diff --git a/examples/zephyr/http-client/CMakeLists.txt b/examples/zephyr/http-client/CMakeLists.txt index a64e924d..a4b28de3 100644 --- a/examples/zephyr/http-client/CMakeLists.txt +++ b/examples/zephyr/http-client/CMakeLists.txt @@ -5,7 +5,7 @@ cmake_minimum_required(VERSION 3.20.0) find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE}) -project(http_server) +project(http_client) #add_definitions(-DMG_ENABLE_LINES=1) add_definitions(-DMG_ENABLE_MBEDTLS=1 -DMG_MBEDTLS_DEBUG_LEVEL=4) target_sources(app PRIVATE src/main.c src/mongoose.c) diff --git a/examples/zephyr/http-client/Makefile b/examples/zephyr/http-client/Makefile index 5a096a5a..1c329a82 100644 --- a/examples/zephyr/http-client/Makefile +++ b/examples/zephyr/http-client/Makefile @@ -1,17 +1,59 @@ -PROJECT_DIR ?= /mnt -ZEPHYR_DIR ?= /zephyrproject -BOARD ?= nucleo_f746zg -DOCKER ?= docker run -v $(realpath $(CURDIR)):/mnt mdashnet/zephyr +MONGOOSE_ROOT ?= $(realpath $(CURDIR)/../../..) +DOCKER_PROJECT_DIR ?= /workdir +ZEPHYR_DIR ?= zephyrproject +PROJECT_NAME = $(notdir $(CURDIR)) +PROJECT_PATH = $(realpath $(CURDIR)) +ZEPHYR_PATH = $(realpath $(CURDIR)/..)/$(ZEPHYR_DIR) +DOCKER_PROJECT_PATH = $(DOCKER_PROJECT_DIR)/$(PROJECT_NAME) +DOCKER_ZEPHYR_PATH = $(DOCKER_PROJECT_DIR)/$(ZEPHYR_DIR) + +BOARD ?= qemu_x86 +ifeq "$(BOARD)" "qemu_x86" +OVERLAY ?= -DOVERLAY_CONFIG=overlay-e1000.conf +else +OVERLAY ?= +endif + +SHAREUSB ?= --privileged -v /dev/bus/usb/:/dev/bus/usb +SHARETUN ?= --cap-add=NET_ADMIN --device /dev/net/tun --net=host +DOCKER ?= docker run --rm -v $(PROJECT_PATH):$(DOCKER_PROJECT_PATH) -v $(ZEPHYR_PATH):$(DOCKER_ZEPHYR_PATH) +REPO ?= zephyrprojectrtos/ci + example: true build: - cp ../../../mongoose.c ../../../mongoose.h src/ - $(DOCKER) /bin/sh -c 'cd $(ZEPHYR_DIR) && west build -b $(BOARD) -p auto $(PROJECT_DIR)' + cp $(MONGOOSE_ROOT)/mongoose.[c,h] src/ + $(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH)/zephyr && \ + west build -b $(BOARD) -p auto $(DOCKER_PROJECT_PATH) $(OVERLAY) --build-dir $(DOCKER_PROJECT_PATH)/build' -flash: - cd $(ZEPHYR_DIR) && west flash +run: + $(DOCKER) -it $(SHARETUN) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && \ + west build -t run --build-dir $(DOCKER_PROJECT_PATH)/build' clean: - rm -rf */*/mongoose.* + $(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && \ + west build -t clean --build-dir $(DOCKER_PROJECT_PATH)/build' + +pristine: + $(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && \ + west build -t pristine --build-dir $(DOCKER_PROJECT_PATH)/build' + + +flash: + $(DOCKER) $(SHAREUSB) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && \ + west flash --build-dir $(DOCKER_PROJECT_PATH)/build' + +debug: + $(DOCKER) -it $(SHAREUSB) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && \ + west debug --build-dir $(DOCKER_PROJECT_PATH)/build' + +.PHONY: build flash zephyr clean pristine run + +zephyr: +ifeq ($(wildcard $(ZEPHYR_PATH)/.*),) + mkdir $(ZEPHYR_PATH) + $(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_PROJECT_DIR) && west init ./$(ZEPHYR_DIR)' +endif + $(DOCKER) $(REPO) /bin/sh -c 'cd $(DOCKER_ZEPHYR_PATH) && west update' diff --git a/examples/zephyr/http-client/README.md b/examples/zephyr/http-client/README.md new file mode 120000 index 00000000..32d46ee8 --- /dev/null +++ b/examples/zephyr/http-client/README.md @@ -0,0 +1 @@ +../README.md \ No newline at end of file diff --git a/examples/zephyr/http-client/overlay-e1000.conf b/examples/zephyr/http-client/overlay-e1000.conf new file mode 100644 index 00000000..1995cfda --- /dev/null +++ b/examples/zephyr/http-client/overlay-e1000.conf @@ -0,0 +1,7 @@ +CONFIG_NET_L2_ETHERNET=y +CONFIG_NET_QEMU_ETHERNET=y +CONFIG_ETH_QEMU_IFACE_NAME="tap0" + +CONFIG_PCIE=y + +#CONFIG_ETHERNET_LOG_LEVEL_DBG=y diff --git a/examples/zephyr/http-client/prj.conf b/examples/zephyr/http-client/prj.conf index 38ff71e3..1c530a00 100644 --- a/examples/zephyr/http-client/prj.conf +++ b/examples/zephyr/http-client/prj.conf @@ -8,6 +8,7 @@ CONFIG_NET_SOCKETS=y CONFIG_NET_SOCKETS_POLL_MAX=32 CONFIG_POSIX_MAX_FDS=32 CONFIG_NET_CONFIG_SETTINGS=y +CONFIG_NET_CONNECTION_MANAGER=y CONFIG_NET_LOG=y CONFIG_LOG=y @@ -27,4 +28,4 @@ CONFIG_MINIMAL_LIBC_MALLOC_ARENA_SIZE=131072 CONFIG_PRINTK=y CONFIG_MBEDTLS_DEBUG=y -CONFIG_MBEDTLS_DEBUG_LEVEL=4 +CONFIG_MBEDTLS_LOG_LEVEL_DBG=y diff --git a/examples/zephyr/http-client/src/main.c b/examples/zephyr/http-client/src/main.c index 92c7389d..c950c301 100644 --- a/examples/zephyr/http-client/src/main.c +++ b/examples/zephyr/http-client/src/main.c @@ -11,6 +11,7 @@ static const char *s_post_data = NULL; // POST data static const int64_t s_timeout_ms = 1500; // Connect timeout in milliseconds struct mg_mgr s_mgr; static int s_connected = 0; +static bool done = false; // Print HTTP response and signal that we're done static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { @@ -54,25 +55,23 @@ static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { } } -// We have no valid system time(), and we need it for TLS. Implement it -time_t time(time_t *tp) { - time_t t = s_boot_timestamp + k_uptime_get() / 1000; +// example system time()-like function +time_t ourtime(time_t *tp) { + time_t t = s_boot_timestamp + mg_millis() / 1000; if (tp != NULL) *tp = t; return t; } -// SNTP callback. Modifies s_boot_timestamp, to make time() correct +// SNTP callback. Modifies s_boot_timestamp, to make ourtime() correct static void sfn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { if (ev == MG_EV_SNTP_TIME) { int64_t t = *(int64_t *) ev_data; MG_INFO(("Got SNTP time: %lld ms from epoch", t)); s_boot_timestamp = (time_t) ((t - mg_millis()) / 1000); - // We need correct time in order to get HTTPs working, therefore, - // making https request from SMTP callback if (!s_connected) { MG_INFO(("Connecting to : [%s]", s_url)); - mg_http_connect(&s_mgr, s_url, fn, NULL); // Create client connection + mg_http_connect(&s_mgr, s_url, fn, &done); // Create client connection s_connected = 1; } } else if (ev == MG_EV_CLOSE) { @@ -87,17 +86,33 @@ static void timer_fn(void *arg) { if (s_boot_timestamp < 9999) mg_sntp_request(s_sntp_conn); } +// Zephyr: Define a semaphore and network management callback to be able to wait +// until our IP address is ready. The main function will start and block on this +// semaphore until this event handler releases it when the network is ready +K_SEM_DEFINE(run, 0, 1); + +static void zeh(struct net_mgmt_event_callback *cb, uint32_t mgmt_event, + struct net_if *iface) { + if (mgmt_event == NET_EVENT_L4_CONNECTED) k_sem_give(&run); +} + int main(int argc, char *argv[]) { + // Zephyr: Register the network management callback and block on the semaphore + struct net_mgmt_event_callback ncb; + net_mgmt_init_event_callback(&ncb, zeh, NET_EVENT_L4_CONNECTED); + net_mgmt_add_event_callback(&ncb); + k_sem_take(&run, K_FOREVER); + mg_log_set(MG_LL_DEBUG); mg_mgr_init(&s_mgr); mg_timer_add(&s_mgr, 5000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_fn, &s_mgr); - // Start infinite event loop + // Start event loop, exit when client is done MG_INFO(("Mongoose version : v%s", MG_VERSION)); - for (;;) mg_mgr_poll(&s_mgr, 1000); + while (!done) mg_mgr_poll(&s_mgr, 1000); mg_mgr_free(&s_mgr); return 0; diff --git a/examples/zephyr/http-client/src/mongoose.c b/examples/zephyr/http-client/src/mongoose.c new file mode 100644 index 00000000..ee00a90c --- /dev/null +++ b/examples/zephyr/http-client/src/mongoose.c @@ -0,0 +1,7294 @@ +// Copyright (c) 2004-2013 Sergey Lyubka +// Copyright (c) 2013-2022 Cesanta Software Limited +// All rights reserved +// +// This software is dual-licensed: you can redistribute it and/or modify +// it under the terms of the GNU General Public License version 2 as +// published by the Free Software Foundation. For the terms of this +// license, see http://www.gnu.org/licenses/ +// +// You are free to use this software under the terms of the GNU General +// Public License, but WITHOUT ANY WARRANTY; without even the implied +// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +// See the GNU General Public License for more details. +// +// Alternatively, you can license this software under a commercial +// license, as set out in https://www.mongoose.ws/licensing/ +// +// SPDX-License-Identifier: GPL-2.0-only or commercial + +#include "mongoose.h" + +#ifdef MG_ENABLE_LINES +#line 1 "src/base64.c" +#endif + + + +static int mg_b64idx(int c) { + if (c < 26) { + return c + 'A'; + } else if (c < 52) { + return c - 26 + 'a'; + } else if (c < 62) { + return c - 52 + '0'; + } else { + return c == 62 ? '+' : '/'; + } +} + +static int mg_b64rev(int c) { + if (c >= 'A' && c <= 'Z') { + return c - 'A'; + } else if (c >= 'a' && c <= 'z') { + return c + 26 - 'a'; + } else if (c >= '0' && c <= '9') { + return c + 52 - '0'; + } else if (c == '+') { + return 62; + } else if (c == '/') { + return 63; + } else if (c == '=') { + return 64; + } else { + return -1; + } +} + +int mg_base64_update(unsigned char ch, char *to, int n) { + int rem = (n & 3) % 3; + if (rem == 0) { + to[n] = (char) mg_b64idx(ch >> 2); + to[++n] = (char) ((ch & 3) << 4); + } else if (rem == 1) { + to[n] = (char) mg_b64idx(to[n] | (ch >> 4)); + to[++n] = (char) ((ch & 15) << 2); + } else { + to[n] = (char) mg_b64idx(to[n] | (ch >> 6)); + to[++n] = (char) mg_b64idx(ch & 63); + n++; + } + return n; +} + +int mg_base64_final(char *to, int n) { + int saved = n; + // printf("---[%.*s]\n", n, to); + if (n & 3) n = mg_base64_update(0, to, n); + if ((saved & 3) == 2) n--; + // printf(" %d[%.*s]\n", n, n, to); + while (n & 3) to[n++] = '='; + to[n] = '\0'; + return n; +} + +int mg_base64_encode(const unsigned char *p, int n, char *to) { + int i, len = 0; + for (i = 0; i < n; i++) len = mg_base64_update(p[i], to, len); + len = mg_base64_final(to, len); + return len; +} + +int mg_base64_decode(const char *src, int n, char *dst) { + const char *end = src == NULL ? NULL : src + n; // Cannot add to NULL + int len = 0; + while (src != NULL && src + 3 < end) { + int a = mg_b64rev(src[0]), b = mg_b64rev(src[1]), c = mg_b64rev(src[2]), + d = mg_b64rev(src[3]); + if (a == 64 || a < 0 || b == 64 || b < 0 || c < 0 || d < 0) return 0; + dst[len++] = (char) ((a << 2) | (b >> 4)); + if (src[2] != '=') { + dst[len++] = (char) ((b << 4) | (c >> 2)); + if (src[3] != '=') dst[len++] = (char) ((c << 6) | d); + } + src += 4; + } + dst[len] = '\0'; + return len; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/dns.c" +#endif + + + + + + + +struct dns_data { + struct dns_data *next; + struct mg_connection *c; + uint64_t expire; + uint16_t txnid; +}; + +static void mg_sendnsreq(struct mg_connection *, struct mg_str *, int, + struct mg_dns *, bool); + +static void mg_dns_free(struct mg_connection *c, struct dns_data *d) { + LIST_DELETE(struct dns_data, + (struct dns_data **) &c->mgr->active_dns_requests, d); + free(d); +} + +void mg_resolve_cancel(struct mg_connection *c) { + struct dns_data *tmp, *d = (struct dns_data *) c->mgr->active_dns_requests; + for (; d != NULL; d = tmp) { + tmp = d->next; + if (d->c == c) mg_dns_free(c, d); + } +} + +static size_t mg_dns_parse_name_depth(const uint8_t *s, size_t len, size_t ofs, + char *to, size_t tolen, size_t j, + int depth) { + size_t i = 0; + if (tolen > 0 && depth == 0) to[0] = '\0'; + if (depth > 5) return 0; + // MG_INFO(("ofs %lx %x %x", (unsigned long) ofs, s[ofs], s[ofs + 1])); + while (ofs + i + 1 < len) { + size_t n = s[ofs + i]; + if (n == 0) { + i++; + break; + } + if (n & 0xc0) { + size_t ptr = (((n & 0x3f) << 8) | s[ofs + i + 1]); // 12 is hdr len + // MG_INFO(("PTR %lx", (unsigned long) ptr)); + if (ptr + 1 < len && (s[ptr] & 0xc0) == 0 && + mg_dns_parse_name_depth(s, len, ptr, to, tolen, j, depth + 1) == 0) + return 0; + i += 2; + break; + } + if (ofs + i + n + 1 >= len) return 0; + if (j > 0) { + if (j < tolen) to[j] = '.'; + j++; + } + if (j + n < tolen) memcpy(&to[j], &s[ofs + i + 1], n); + j += n; + i += n + 1; + if (j < tolen) to[j] = '\0'; // Zero-terminate this chunk + // MG_INFO(("--> [%s]", to)); + } + if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term + return i; +} + +static size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, + char *dst, size_t dstlen) { + return mg_dns_parse_name_depth(s, n, ofs, dst, dstlen, 0, 0); +} + +size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs, + bool is_question, struct mg_dns_rr *rr) { + const uint8_t *s = buf + ofs, *e = &buf[len]; + + memset(rr, 0, sizeof(*rr)); + if (len < sizeof(struct mg_dns_header)) return 0; // Too small + if (len > 512) return 0; // Too large, we don't expect that + if (s >= e) return 0; // Overflow + + if ((rr->nlen = (uint16_t) mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0) + return 0; + s += rr->nlen + 4; + if (s > e) return 0; + rr->atype = (uint16_t) (((uint16_t) s[-4] << 8) | s[-3]); + rr->aclass = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (is_question) return (size_t) (rr->nlen + 4); + + s += 6; + if (s > e) return 0; + rr->alen = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (s + rr->alen > e) return 0; + return (size_t) (rr->nlen + rr->alen + 10); +} + +bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) { + const struct mg_dns_header *h = (struct mg_dns_header *) buf; + struct mg_dns_rr rr; + size_t i, n, ofs = sizeof(*h); + memset(dm, 0, sizeof(*dm)); + + if (len < sizeof(*h)) return 0; // Too small, headers dont fit + if (mg_ntohs(h->num_questions) > 1) return 0; // Sanity + if (mg_ntohs(h->num_answers) > 10) return 0; // Sanity + dm->txnid = mg_ntohs(h->txnid); + + for (i = 0; i < mg_ntohs(h->num_questions); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, true, &rr)) == 0) return false; + // MG_INFO(("Q %lu %lu %hu/%hu", ofs, n, rr.atype, rr.aclass)); + ofs += n; + } + for (i = 0; i < mg_ntohs(h->num_answers); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false; + // MG_INFO(("A -- %lu %lu %hu/%hu %s", ofs, n, rr.atype, rr.aclass, + // dm->name)); + mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name)); + ofs += n; + + if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) { + dm->addr.is_ip6 = false; + memcpy(&dm->addr.ip, &buf[ofs - 4], 4); + dm->resolved = true; + break; // Return success + } else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) { + dm->addr.is_ip6 = true; + memcpy(&dm->addr.ip6, &buf[ofs - 16], 16); + dm->resolved = true; + break; // Return success + } + } + return true; +} + +static void dns_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + struct dns_data *d, *tmp; + if (ev == MG_EV_POLL) { + uint64_t now = *(uint64_t *) ev_data; + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_DEBUG ("%lu %lu dns poll", d->expire, now)); + if (now > d->expire) mg_error(d->c, "DNS timeout"); + } + } else if (ev == MG_EV_READ) { + struct mg_dns_message dm; + int resolved = 0; + if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) { + MG_ERROR(("Unexpected DNS response:")); + mg_hexdump(c->recv.buf, c->recv.len); + } else { + // MG_VERBOSE(("%s %d", dm.name, dm.resolved)); + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_INFO(("d %p %hu %hu", d, d->txnid, dm.txnid)); + if (dm.txnid != d->txnid) continue; + if (d->c->is_resolving) { + if (dm.resolved) { + char buf[100]; + dm.addr.port = d->c->rem.port; // Save port + d->c->rem = dm.addr; // Copy resolved address + MG_DEBUG(("%lu %s is %s", d->c->id, dm.name, + mg_ntoa(&d->c->rem, buf, sizeof(buf)))); + mg_connect_resolved(d->c); +#if MG_ENABLE_IPV6 + } else if (dm.addr.is_ip6 == false && dm.name[0] != '\0' && + c->mgr->use_dns6 == false) { + struct mg_str x = mg_str(dm.name); + mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true); +#endif + } else { + mg_error(d->c, "%s DNS lookup failed", dm.name); + } + } else { + MG_ERROR(("%lu already resolved", d->c->id)); + } + mg_dns_free(c, d); + resolved = 1; + } + } + if (!resolved) MG_ERROR(("stray DNS reply")); + c->recv.len = 0; + } else if (ev == MG_EV_CLOSE) { + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + mg_error(d->c, "DNS error"); + mg_dns_free(c, d); + } + } + (void) fn_data; +} + +static bool mg_dns_send(struct mg_connection *c, const struct mg_str *name, + uint16_t txnid, bool ipv6) { + struct { + struct mg_dns_header header; + uint8_t data[256]; + } pkt; + size_t i, n; + memset(&pkt, 0, sizeof(pkt)); + pkt.header.txnid = mg_htons(txnid); + pkt.header.flags = mg_htons(0x100); + pkt.header.num_questions = mg_htons(1); + for (i = n = 0; i < sizeof(pkt.data) - 5; i++) { + if (name->ptr[i] == '.' || i >= name->len) { + pkt.data[n] = (uint8_t) (i - n); + memcpy(&pkt.data[n + 1], name->ptr + n, i - n); + n = i + 1; + } + if (i >= name->len) break; + } + memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5); // A query + n += 5; + if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query + // memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query + // n += 6; + return mg_send(c, &pkt, sizeof(pkt.header) + n); +} + +static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms, + struct mg_dns *dnsc, bool ipv6) { + struct dns_data *d = NULL; + if (dnsc->url == NULL) { + mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()"); + } else if (dnsc->c == NULL) { + dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL); + if (dnsc->c != NULL) { + dnsc->c->pfn = dns_cb; + // dnsc->c->is_hexdumping = 1; + } + } + if (dnsc->c == NULL) { + mg_error(c, "resolver"); + } else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) { + mg_error(c, "resolve OOM"); + } else { + struct dns_data *reqs = (struct dns_data *) c->mgr->active_dns_requests; + char buf[100]; + d->txnid = reqs ? (uint16_t) (reqs->txnid + 1) : 1; + d->next = (struct dns_data *) c->mgr->active_dns_requests; + c->mgr->active_dns_requests = d; + d->expire = mg_millis() + (uint64_t) ms; + d->c = c; + c->is_resolving = 1; + MG_VERBOSE(("%lu resolving %.*s @ %s, txnid %hu", c->id, (int) name->len, + name->ptr, mg_ntoa(&dnsc->c->rem, buf, sizeof(buf)), d->txnid)); + if (!mg_dns_send(dnsc->c, name, d->txnid, ipv6)) { + mg_error(dnsc->c, "DNS send"); + } + } +} + +void mg_resolve(struct mg_connection *c, const char *url) { + struct mg_str host = mg_url_host(url); + c->rem.port = mg_htons(mg_url_port(url)); + if (mg_aton(host, &c->rem)) { + // host is an IP address, do not fire name resolution + mg_connect_resolved(c); + } else { + // host is not an IP, send DNS resolution request + struct mg_dns *dns = c->mgr->use_dns6 ? &c->mgr->dns6 : &c->mgr->dns4; + mg_sendnsreq(c, &host, c->mgr->dnstimeout, dns, c->mgr->use_dns6); + } +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/event.c" +#endif + + + + + +void mg_call(struct mg_connection *c, int ev, void *ev_data) { + // Run user-defined handler first, in order to give it an ability + // to intercept processing (e.g. clean input buffer) before the + // protocol handler kicks in + if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data); + if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data); +} + +void mg_error(struct mg_connection *c, const char *fmt, ...) { + char buf[64]; + va_list ap; + va_start(ap, fmt); + mg_vsnprintf(buf, sizeof(buf), fmt, &ap); + va_end(ap); + MG_ERROR(("%lu %p %s", c->id, c->fd, buf)); + c->is_closing = 1; // Set is_closing before sending MG_EV_CALL + mg_call(c, MG_EV_ERROR, buf); // Let user handler to override it +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fmt.c" +#endif + + + +static void mg_pfn_iobuf_private(char ch, void *param, bool expand) { + struct mg_iobuf *io = (struct mg_iobuf *) param; + if (expand && io->len + 2 > io->size) mg_iobuf_resize(io, io->len + 2); + if (io->len + 2 <= io->size) { + io->buf[io->len++] = (uint8_t) ch; + io->buf[io->len] = 0; + } else if (io->len < io->size) { + io->buf[io->len++] = 0; // Guarantee to 0-terminate + } +} + +static void mg_putchar_iobuf_static(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, false); +} + +void mg_pfn_iobuf(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, true); +} + +size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap) { + struct mg_iobuf io = {(uint8_t *) buf, len, 0, 0}; + size_t n = mg_vxprintf(mg_putchar_iobuf_static, &io, fmt, ap); + if (n < len) buf[n] = '\0'; + return n; +} + +size_t mg_snprintf(char *buf, size_t len, const char *fmt, ...) { + va_list ap; + size_t n; + va_start(ap, fmt); + n = mg_vsnprintf(buf, len, fmt, &ap); + va_end(ap); + return n; +} + +char *mg_vmprintf(const char *fmt, va_list *ap) { + struct mg_iobuf io = {0, 0, 0, 256}; + mg_vxprintf(mg_pfn_iobuf, &io, fmt, ap); + return (char *) io.buf; +} + +char *mg_mprintf(const char *fmt, ...) { + char *s; + va_list ap; + va_start(ap, fmt); + s = mg_vmprintf(fmt, &ap); + va_end(ap); + return s; +} + +size_t mg_xprintf(void (*out)(char, void *), void *ptr, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vxprintf(out, ptr, fmt, &ap); + va_end(ap); + return len; +} + +static bool is_digit(int c) { + return c >= '0' && c <= '9'; +} + +static int addexp(char *buf, int e, int sign) { + int n = 0; + buf[n++] = 'e'; + buf[n++] = (char) sign; + if (e > 400) return 0; + if (e < 10) buf[n++] = '0'; + if (e >= 100) buf[n++] = (char) (e / 100 + '0'), e -= 100 * (e / 100); + if (e >= 10) buf[n++] = (char) (e / 10 + '0'), e -= 10 * (e / 10); + buf[n++] = (char) (e + '0'); + return n; +} + +static int xisinf(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) == 0x7ff00000 && + ((unsigned) ieee754.u == 0); +} + +static int xisnan(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) + + ((unsigned) ieee754.u != 0) > + 0x7ff00000; +} + +static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width) { + char buf[40]; + int i, s = 0, n = 0, e = 0; + double t, mul, saved; + if (d == 0.0) return mg_snprintf(dst, dstlen, "%s", "0"); + if (xisinf(d)) return mg_snprintf(dst, dstlen, "%s", d > 0 ? "inf" : "-inf"); + if (xisnan(d)) return mg_snprintf(dst, dstlen, "%s", "nan"); + if (d < 0.0) d = -d, buf[s++] = '-'; + + // Round + saved = d; + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0; + while (d <= 1.0 && d / mul <= 1.0) mul /= 10.0; + for (i = 0, t = mul * 5; i < width; i++) t /= 10.0; + d += t; + // Calculate exponent, and 'mul' for scientific representation + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0, e++; + while (d < 1.0 && d / mul < 1.0) mul /= 10.0, e--; + // printf(" --> %g %d %g %g\n", saved, e, t, mul); + + if (e >= width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / t, e, n, buf); + n += addexp(buf + s + n, e, '+'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else if (e <= -width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / mul, e, n, buf); + n += addexp(buf + s + n, -e, '-'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else { + for (i = 0, t = mul; t >= 1.0 && s + n < (int) sizeof(buf); i++) { + int ch = (int) (d / t); + if (n > 0 || ch > 0) buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + // printf(" --> [%g] -> %g %g (%d) [%.*s]\n", saved, d, t, n, s + n, buf); + if (n == 0) buf[s++] = '0'; + while (t >= 1.0 && n + s < (int) sizeof(buf)) buf[n++] = '0', t /= 10.0; + if (s + n < (int) sizeof(buf)) buf[n + s++] = '.'; + // printf(" 1--> [%g] -> [%.*s]\n", saved, s + n, buf); + for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && n < width; i++) { + int ch = (int) (d / t); + buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + } + while (n > 0 && buf[s + n - 1] == '0') n--; // Trim trailing zeros + if (n > 0 && buf[s + n - 1] == '.') n--; // Trim trailing dot + n += s; + if (n >= (int) sizeof(buf)) n = (int) sizeof(buf) - 1; + buf[n] = '\0'; + return mg_snprintf(dst, dstlen, "%s", buf); +} + +static size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex) { + const char *letters = "0123456789abcdef"; + uint64_t v = (uint64_t) val; + size_t s = 0, n, i; + if (is_signed && val < 0) buf[s++] = '-', v = (uint64_t) (-val); + // This loop prints a number in reverse order. I guess this is because we + // write numbers from right to left: least significant digit comes last. + // Maybe because we use Arabic numbers, and Arabs write RTL? + if (is_hex) { + for (n = 0; v; v >>= 4) buf[s + n++] = letters[v & 15]; + } else { + for (n = 0; v; v /= 10) buf[s + n++] = letters[v % 10]; + } + // Reverse a string + for (i = 0; i < n / 2; i++) { + char t = buf[s + i]; + buf[s + i] = buf[s + n - i - 1], buf[s + n - i - 1] = t; + } + if (val == 0) buf[n++] = '0'; // Handle special case + return n + s; +} + +static size_t scpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0; + while (i < len && buf[i] != '\0') out(buf[i++], ptr); + return i; +} + +static char mg_esc(int c, bool esc) { + const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\""; + for (p = esc ? esc1 : esc2; *p != '\0'; p++) { + if (*p == c) return esc ? esc2[p - esc1] : esc1[p - esc2]; + } + return 0; +} + +static char mg_escape(int c) { + return mg_esc(c, true); +} + +static size_t qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0, extra = 0; + for (i = 0; i < len && buf[i] != '\0'; i++) { + char c = mg_escape(buf[i]); + if (c) { + out('\\', ptr), out(c, ptr), extra++; + } else { + out(buf[i], ptr); + } + } + return i + extra; +} + +static size_t Qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t n = 2; + out('"', ptr); + n += qcpy(out, ptr, buf, len); + out('"', ptr); + return n; +} + +static size_t bcpy(void (*out)(char, void *), void *ptr, uint8_t *buf, + size_t len) { + size_t i, n = 0; + const char *t = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + out('"', ptr), n++; + for (i = 0; i < len; i += 3) { + uint8_t c1 = buf[i], c2 = i + 1 < len ? buf[i + 1] : 0, + c3 = i + 2 < len ? buf[i + 2] : 0; + char tmp[4] = {t[c1 >> 2], t[(c1 & 3) << 4 | (c2 >> 4)], '=', '='}; + if (i + 1 < len) tmp[2] = t[(c2 & 15) << 2 | (c3 >> 6)]; + if (i + 2 < len) tmp[3] = t[c3 & 63]; + n += scpy(out, ptr, tmp, sizeof(tmp)); + } + out('"', ptr), n++; + return n; +} + +size_t mg_vxprintf(void (*out)(char, void *), void *param, const char *fmt, + va_list *ap) { + size_t i = 0, n = 0; + while (fmt[i] != '\0') { + if (fmt[i] == '%') { + size_t j, k, x = 0, is_long = 0, w = 0 /* width */, pr = ~0U /* prec */; + char pad = ' ', minus = 0, c = fmt[++i]; + if (c == '#') x++, c = fmt[++i]; + if (c == '-') minus++, c = fmt[++i]; + if (c == '0') pad = '0', c = fmt[++i]; + while (is_digit(c)) w *= 10, w += (size_t) (c - '0'), c = fmt[++i]; + if (c == '.') { + c = fmt[++i]; + if (c == '*') { + pr = (size_t) va_arg(*ap, int); + c = fmt[++i]; + } else { + pr = 0; + while (is_digit(c)) pr *= 10, pr += (size_t) (c - '0'), c = fmt[++i]; + } + } + while (c == 'h') c = fmt[++i]; // Treat h and hh as int + if (c == 'l') { + is_long++, c = fmt[++i]; + if (c == 'l') is_long++, c = fmt[++i]; + } + if (c == 'p') x = 1, is_long = 1; + if (c == 'd' || c == 'u' || c == 'x' || c == 'X' || c == 'p' || + c == 'g' || c == 'f') { + bool s = (c == 'd'), h = (c == 'x' || c == 'X' || c == 'p'); + char tmp[40]; + size_t xl = x ? 2 : 0; + if (c == 'g' || c == 'f') { + double v = va_arg(*ap, double); + if (pr == ~0U) pr = 6; + k = mg_dtoa(tmp, sizeof(tmp), v, (int) pr); + } else if (is_long == 2) { + int64_t v = va_arg(*ap, int64_t); + k = mg_lld(tmp, v, s, h); + } else if (is_long == 1) { + long v = va_arg(*ap, long); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned long) v, s, h); + } else { + int v = va_arg(*ap, int); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned) v, s, h); + } + for (j = 0; j < xl && w > 0; j++) w--; + for (j = 0; pad == ' ' && !minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, (char *) "0x", xl); + for (j = 0; pad == '0' && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, tmp, k); + for (j = 0; pad == ' ' && minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + } else if (c == 'M') { + mg_pm_t f = va_arg(*ap, mg_pm_t); + n += f(out, param, ap); + } else if (c == 'c') { + int ch = va_arg(*ap, int); + out((char) ch, param); + n++; + } else if (c == 'H') { + // Print hex-encoded double-quoted string + size_t bl = (size_t) va_arg(*ap, int); + uint8_t *p = va_arg(*ap, uint8_t *), dquote = '"'; + const char *hex = "0123456789abcdef"; + n += scpy(out, param, (char *) &dquote, 1); + for (j = 0; j < bl; j++) { + n += scpy(out, param, (char *) &hex[(p[j] >> 4) & 15], 1); + n += scpy(out, param, (char *) &hex[p[j] & 15], 1); + } + n += scpy(out, param, (char *) &dquote, 1); + } else if (c == 'V') { + // Print base64-encoded double-quoted string + size_t len = (size_t) va_arg(*ap, int); + uint8_t *buf = va_arg(*ap, uint8_t *); + n += bcpy(out, param, buf, len); + } else if (c == 's' || c == 'Q' || c == 'q') { + char *p = va_arg(*ap, char *); + size_t (*f)(void (*)(char, void *), void *, char *, size_t) = scpy; + if (c == 'Q') f = Qcpy; + if (c == 'q') f = qcpy; + if (pr == ~0U) pr = p == NULL ? 0 : strlen(p); + for (j = 0; !minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + n += f(out, param, p, pr); + for (j = 0; minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + } else if (c == '%') { + out('%', param); + n++; + } else { + out('%', param); + out(c, param); + n += 2; + } + i++; + } else { + out(fmt[i], param), n++, i++; + } + } + return n; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs.c" +#endif + + + +struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags) { + struct mg_fd *fd = (struct mg_fd *) calloc(1, sizeof(*fd)); + if (fd != NULL) { + fd->fd = fs->op(path, flags); + fd->fs = fs; + if (fd->fd == NULL) { + free(fd); + fd = NULL; + } + } + return fd; +} + +void mg_fs_close(struct mg_fd *fd) { + if (fd != NULL) { + fd->fs->cl(fd->fd); + free(fd); + } +} + +char *mg_file_read(struct mg_fs *fs, const char *path, size_t *sizep) { + struct mg_fd *fd; + char *data = NULL; + size_t size = 0; + fs->st(path, &size, NULL); + if ((fd = mg_fs_open(fs, path, MG_FS_READ)) != NULL) { + data = (char *) calloc(1, size + 1); + if (data != NULL) { + if (fs->rd(fd->fd, data, size) != size) { + free(data); + data = NULL; + } else { + data[size] = '\0'; + if (sizep != NULL) *sizep = size; + } + } + mg_fs_close(fd); + } + return data; +} + +bool mg_file_write(struct mg_fs *fs, const char *path, const void *buf, + size_t len) { + bool result = false; + struct mg_fd *fd; + char tmp[MG_PATH_MAX]; + mg_snprintf(tmp, sizeof(tmp), "%s..%d", path, rand()); + if ((fd = mg_fs_open(fs, tmp, MG_FS_WRITE)) != NULL) { + result = fs->wr(fd->fd, buf, len) == len; + mg_fs_close(fd); + if (result) { + fs->rm(path); + fs->mv(tmp, path); + } else { + fs->rm(tmp); + } + } + return result; +} + +bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...) { + va_list ap; + char *data; + bool result = false; + va_start(ap, fmt); + data = mg_vmprintf(fmt, &ap); + va_end(ap); + result = mg_file_write(fs, path, data, strlen(data)); + free(data); + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_fat.c" +#endif + + + +#if MG_ENABLE_FATFS +#include + +static int mg_days_from_epoch(int y, int m, int d) { + y -= m <= 2; + int era = y / 400; + int yoe = y - era * 400; + int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1; + int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy; + return era * 146097 + doe - 719468; +} + +static time_t mg_timegm(const struct tm *t) { + int year = t->tm_year + 1900; + int month = t->tm_mon; // 0-11 + if (month > 11) { + year += month / 12; + month %= 12; + } else if (month < 0) { + int years_diff = (11 - month) / 12; + year -= years_diff; + month += 12 * years_diff; + } + int x = mg_days_from_epoch(year, month + 1, t->tm_mday); + return 60 * (60 * (24L * x + t->tm_hour) + t->tm_min) + t->tm_sec; +} + +static time_t ff_time_to_epoch(uint16_t fdate, uint16_t ftime) { + struct tm tm; + memset(&tm, 0, sizeof(struct tm)); + tm.tm_sec = (ftime << 1) & 0x3e; + tm.tm_min = ((ftime >> 5) & 0x3f); + tm.tm_hour = ((ftime >> 11) & 0x1f); + tm.tm_mday = (fdate & 0x1f); + tm.tm_mon = ((fdate >> 5) & 0x0f) - 1; + tm.tm_year = ((fdate >> 9) & 0x7f) + 80; + return mg_timegm(&tm); +} + +static int ff_stat(const char *path, size_t *size, time_t *mtime) { + FILINFO fi; + if (path[0] == '\0') { + if (size) *size = 0; + if (mtime) *mtime = 0; + return MG_FS_DIR; + } else if (f_stat(path, &fi) == 0) { + if (size) *size = (size_t) fi.fsize; + if (mtime) *mtime = ff_time_to_epoch(fi.fdate, fi.ftime); + return MG_FS_READ | MG_FS_WRITE | ((fi.fattrib & AM_DIR) ? MG_FS_DIR : 0); + } else { + return 0; + } +} + +static void ff_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + DIR d; + FILINFO fi; + if (f_opendir(&d, dir) == FR_OK) { + while (f_readdir(&d, &fi) == FR_OK && fi.fname[0] != '\0') { + if (!strcmp(fi.fname, ".") || !strcmp(fi.fname, "..")) continue; + fn(fi.fname, userdata); + } + f_closedir(&d); + } +} + +static void *ff_open(const char *path, int flags) { + FIL f; + unsigned char mode = FA_READ; + if (flags & MG_FS_WRITE) mode |= FA_WRITE | FA_OPEN_ALWAYS | FA_OPEN_APPEND; + if (f_open(&f, path, mode) == 0) { + FIL *fp = calloc(1, sizeof(*fp)); + memcpy(fp, &f, sizeof(*fp)); + return fp; + } else { + return NULL; + } +} + +static void ff_close(void *fp) { + if (fp != NULL) { + f_close((FIL *) fp); + free(fp); + } +} + +static size_t ff_read(void *fp, void *buf, size_t len) { + UINT n = 0, misalign = ((size_t) buf) & 3; + if (misalign) { + char aligned[4]; + f_read((FIL *) fp, aligned, len > misalign ? misalign : len, &n); + memcpy(buf, aligned, n); + } else { + f_read((FIL *) fp, buf, len, &n); + } + return n; +} + +static size_t ff_write(void *fp, const void *buf, size_t len) { + UINT n = 0; + return f_write((FIL *) fp, (char *) buf, len, &n) == FR_OK ? n : 0; +} + +static size_t ff_seek(void *fp, size_t offset) { + f_lseek((FIL *) fp, offset); + return offset; +} + +static bool ff_rename(const char *from, const char *to) { + return f_rename(from, to) == FR_OK; +} + +static bool ff_remove(const char *path) { + return f_unlink(path) == FR_OK; +} + +static bool ff_mkdir(const char *path) { + return f_mkdir(path) == FR_OK; +} + +struct mg_fs mg_fs_fat = {ff_stat, ff_list, ff_open, ff_close, ff_read, + ff_write, ff_seek, ff_rename, ff_remove, ff_mkdir}; +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_packed.c" +#endif + + + + +struct packed_file { + const char *data; + size_t size; + size_t pos; +}; + +const char *mg_unpack(const char *path, size_t *size, time_t *mtime); +const char *mg_unlist(size_t no); + +#if MG_ENABLE_PACKED_FS +#else +const char *mg_unpack(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return NULL; +} +const char *mg_unlist(size_t no) { + (void) no; + return NULL; +} +#endif + +static int is_dir_prefix(const char *prefix, size_t n, const char *path) { + // MG_INFO(("[%.*s] [%s] %c", (int) n, prefix, path, path[n])); + return n < strlen(path) && strncmp(prefix, path, n) == 0 && + (n == 0 || path[n] == '/' || path[n - 1] == '/'); +} + +static int packed_stat(const char *path, size_t *size, time_t *mtime) { + const char *p; + size_t i, n = strlen(path); + if (mg_unpack(path, size, mtime)) return MG_FS_READ; // Regular file + // Scan all files. If `path` is a dir prefix for any of them, it's a dir + for (i = 0; (p = mg_unlist(i)) != NULL; i++) { + if (is_dir_prefix(path, n, p)) return MG_FS_DIR; + } + return 0; +} + +static void packed_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + char buf[MG_PATH_MAX], tmp[sizeof(buf)]; + const char *path, *begin, *end; + size_t i, n = strlen(dir); + tmp[0] = '\0'; // Previously listed entry + for (i = 0; (path = mg_unlist(i)) != NULL; i++) { + if (!is_dir_prefix(dir, n, path)) continue; + begin = &path[n + 1]; + end = strchr(begin, '/'); + if (end == NULL) end = begin + strlen(begin); + mg_snprintf(buf, sizeof(buf), "%.*s", (int) (end - begin), begin); + buf[sizeof(buf) - 1] = '\0'; + // If this entry has been already listed, skip + // NOTE: we're assuming that file list is sorted alphabetically + if (strcmp(buf, tmp) == 0) continue; + fn(buf, userdata); // Not yet listed, call user function + strcpy(tmp, buf); // And save this entry as listed + } +} + +static void *packed_open(const char *path, int flags) { + size_t size = 0; + const char *data = mg_unpack(path, &size, NULL); + struct packed_file *fp = NULL; + if (data == NULL) return NULL; + if (flags & MG_FS_WRITE) return NULL; + fp = (struct packed_file *) calloc(1, sizeof(*fp)); + fp->size = size; + fp->data = data; + return (void *) fp; +} + +static void packed_close(void *fp) { + if (fp != NULL) free(fp); +} + +static size_t packed_read(void *fd, void *buf, size_t len) { + struct packed_file *fp = (struct packed_file *) fd; + if (fp->pos + len > fp->size) len = fp->size - fp->pos; + memcpy(buf, &fp->data[fp->pos], len); + fp->pos += len; + return len; +} + +static size_t packed_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} + +static size_t packed_seek(void *fd, size_t offset) { + struct packed_file *fp = (struct packed_file *) fd; + fp->pos = offset; + if (fp->pos > fp->size) fp->pos = fp->size; + return fp->pos; +} + +static bool packed_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} + +static bool packed_remove(const char *path) { + (void) path; + return false; +} + +static bool packed_mkdir(const char *path) { + (void) path; + return false; +} + +struct mg_fs mg_fs_packed = { + packed_stat, packed_list, packed_open, packed_close, packed_read, + packed_write, packed_seek, packed_rename, packed_remove, packed_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_posix.c" +#endif + + +#if MG_ENABLE_FILE + +#ifndef MG_STAT_STRUCT +#define MG_STAT_STRUCT stat +#endif + +#ifndef MG_STAT_FUNC +#define MG_STAT_FUNC stat +#endif + +static int p_stat(const char *path, size_t *size, time_t *mtime) { +#if !defined(S_ISDIR) + MG_ERROR(("stat() API is not supported. %p %p %p", path, size, mtime)); + return 0; +#else +#if MG_ARCH == MG_ARCH_WIN32 + struct _stati64 st; + wchar_t tmp[MG_PATH_MAX]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, tmp, sizeof(tmp) / sizeof(tmp[0])); + if (_wstati64(tmp, &st) != 0) return 0; +#else + struct MG_STAT_STRUCT st; + if (MG_STAT_FUNC(path, &st) != 0) return 0; +#endif + if (size) *size = (size_t) st.st_size; + if (mtime) *mtime = st.st_mtime; + return MG_FS_READ | MG_FS_WRITE | (S_ISDIR(st.st_mode) ? MG_FS_DIR : 0); +#endif +} + +#if MG_ARCH == MG_ARCH_WIN32 +struct dirent { + char d_name[MAX_PATH]; +}; + +typedef struct win32_dir { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; + +int gettimeofday(struct timeval *tv, void *tz) { + FILETIME ft; + unsigned __int64 tmpres = 0; + + if (tv != NULL) { + GetSystemTimeAsFileTime(&ft); + tmpres |= ft.dwHighDateTime; + tmpres <<= 32; + tmpres |= ft.dwLowDateTime; + tmpres /= 10; // convert into microseconds + tmpres -= (int64_t) 11644473600000000; + tv->tv_sec = (long) (tmpres / 1000000UL); + tv->tv_usec = (long) (tmpres % 1000000UL); + } + (void) tz; + return 0; +} + +static int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + int ret; + char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p; + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + // Trim trailing slashes. Leave backslash for paths like "X:\" + p = buf + strlen(buf) - 1; + while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + // Convert back to Unicode. If doubly-converted string does not match the + // original, something is fishy, reject. + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + ret = 0; + } + return ret; +} + +DIR *opendir(const char *name) { + DIR *d = NULL; + wchar_t wpath[MAX_PATH]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((d = (DIR *) calloc(1, sizeof(*d))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0])); + attrs = GetFileAttributesW(wpath); + if (attrs != 0Xffffffff && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + d->handle = FindFirstFileW(wpath, &d->info); + d->result.d_name[0] = '\0'; + } else { + free(d); + d = NULL; + } + } + return d; +} + +int closedir(DIR *d) { + int result = 0; + if (d != NULL) { + if (d->handle != INVALID_HANDLE_VALUE) + result = FindClose(d->handle) ? 0 : -1; + free(d); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} + +struct dirent *readdir(DIR *d) { + struct dirent *result = NULL; + if (d != NULL) { + memset(&d->result, 0, sizeof(d->result)); + if (d->handle != INVALID_HANDLE_VALUE) { + result = &d->result; + WideCharToMultiByte(CP_UTF8, 0, d->info.cFileName, -1, result->d_name, + sizeof(result->d_name), NULL, NULL); + if (!FindNextFileW(d->handle, &d->info)) { + FindClose(d->handle); + d->handle = INVALID_HANDLE_VALUE; + } + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} +#endif + +static void p_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { +#if MG_ENABLE_DIRLIST + struct dirent *dp; + DIR *dirp; + if ((dirp = (opendir(dir))) == NULL) return; + while ((dp = readdir(dirp)) != NULL) { + if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; + fn(dp->d_name, userdata); + } + closedir(dirp); +#else + (void) dir, (void) fn, (void) userdata; +#endif +} + +static void *p_open(const char *path, int flags) { + const char *mode = flags == MG_FS_READ ? "rb" : "a+b"; +#if MG_ARCH == MG_ARCH_WIN32 + wchar_t b1[MG_PATH_MAX], b2[10]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, b1, sizeof(b1) / sizeof(b1[0])); + MultiByteToWideChar(CP_UTF8, 0, mode, -1, b2, sizeof(b2) / sizeof(b2[0])); + return (void *) _wfopen(b1, b2); +#else + return (void *) fopen(path, mode); +#endif +} + +static void p_close(void *fp) { + fclose((FILE *) fp); +} + +static size_t p_read(void *fp, void *buf, size_t len) { + return fread(buf, 1, len, (FILE *) fp); +} + +static size_t p_write(void *fp, const void *buf, size_t len) { + return fwrite(buf, 1, len, (FILE *) fp); +} + +static size_t p_seek(void *fp, size_t offset) { +#if (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64) || \ + (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \ + (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600) + if (fseeko((FILE *) fp, (off_t) offset, SEEK_SET) != 0) (void) 0; +#else + if (fseek((FILE *) fp, (long) offset, SEEK_SET) != 0) (void) 0; +#endif + return (size_t) ftell((FILE *) fp); +} + +static bool p_rename(const char *from, const char *to) { + return rename(from, to) == 0; +} + +static bool p_remove(const char *path) { + return remove(path) == 0; +} + +static bool p_mkdir(const char *path) { + return mkdir(path, 0775) == 0; +} + +#else + +static int p_stat(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return 0; +} +static void p_list(const char *path, void (*fn)(const char *, void *), + void *userdata) { + (void) path, (void) fn, (void) userdata; +} +static void *p_open(const char *path, int flags) { + (void) path, (void) flags; + return NULL; +} +static void p_close(void *fp) { + (void) fp; +} +static size_t p_read(void *fd, void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_seek(void *fd, size_t offset) { + (void) fd, (void) offset; + return (size_t) ~0; +} +static bool p_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} +static bool p_remove(const char *path) { + (void) path; + return false; +} +static bool p_mkdir(const char *path) { + (void) path; + return false; +} +#endif + +struct mg_fs mg_fs_posix = {p_stat, p_list, p_open, p_close, p_read, + p_write, p_seek, p_rename, p_remove, p_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/http.c" +#endif + + + + + + + + + + + +// Chunk deletion marker is the MSB in the "processed" counter +#define MG_DMARK ((size_t) 1 << (sizeof(size_t) * 8 - 1)) + +// Multipart POST example: +// --xyz +// Content-Disposition: form-data; name="val" +// +// abcdef +// --xyz +// Content-Disposition: form-data; name="foo"; filename="a.txt" +// Content-Type: text/plain +// +// hello world +// +// --xyz-- +size_t mg_http_next_multipart(struct mg_str body, size_t ofs, + struct mg_http_part *part) { + struct mg_str cd = mg_str_n("Content-Disposition", 19); + const char *s = body.ptr; + size_t b = ofs, h1, h2, b1, b2, max = body.len; + + // Init part params + if (part != NULL) part->name = part->filename = part->body = mg_str_n(0, 0); + + // Skip boundary + while (b + 2 < max && s[b] != '\r' && s[b + 1] != '\n') b++; + if (b <= ofs || b + 2 >= max) return 0; + // MG_INFO(("B: %zu %zu [%.*s]", ofs, b - ofs, (int) (b - ofs), s)); + + // Skip headers + h1 = h2 = b + 2; + for (;;) { + while (h2 + 2 < max && s[h2] != '\r' && s[h2 + 1] != '\n') h2++; + if (h2 == h1) break; + if (h2 + 2 >= max) return 0; + // MG_INFO(("Header: [%.*s]", (int) (h2 - h1), &s[h1])); + if (part != NULL && h1 + cd.len + 2 < h2 && s[h1 + cd.len] == ':' && + mg_ncasecmp(&s[h1], cd.ptr, cd.len) == 0) { + struct mg_str v = mg_str_n(&s[h1 + cd.len + 2], h2 - (h1 + cd.len + 2)); + part->name = mg_http_get_header_var(v, mg_str_n("name", 4)); + part->filename = mg_http_get_header_var(v, mg_str_n("filename", 8)); + } + h1 = h2 = h2 + 2; + } + b1 = b2 = h2 + 2; + while (b2 + 2 + (b - ofs) + 2 < max && !(s[b2] == '\r' && s[b2 + 1] == '\n' && + memcmp(&s[b2 + 2], s, b - ofs) == 0)) + b2++; + + if (b2 + 2 >= max) return 0; + if (part != NULL) part->body = mg_str_n(&s[b1], b2 - b1); + // MG_INFO(("Body: [%.*s]", (int) (b2 - b1), &s[b1])); + return b2 + 2; +} + +void mg_http_bauth(struct mg_connection *c, const char *user, + const char *pass) { + struct mg_str u = mg_str(user), p = mg_str(pass); + size_t need = c->send.len + 36 + (u.len + p.len) * 2; + if (c->send.size < need) mg_iobuf_resize(&c->send, need); + if (c->send.size >= need) { + int i, n = 0; + char *buf = (char *) &c->send.buf[c->send.len + 21]; + memcpy(&buf[-21], "Authorization: Basic ", 21); // DON'T use mg_send! + for (i = 0; i < (int) u.len; i++) { + n = mg_base64_update(((unsigned char *) u.ptr)[i], buf, n); + } + if (p.len > 0) { + n = mg_base64_update(':', buf, n); + for (i = 0; i < (int) p.len; i++) { + n = mg_base64_update(((unsigned char *) p.ptr)[i], buf, n); + } + } + n = mg_base64_final(buf, n); + c->send.len += 21 + (size_t) n + 2; + memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2); + } else { + MG_ERROR(("%lu %s cannot resize iobuf %d->%d ", c->id, c->label, + (int) c->send.size, (int) need)); + } +} + +struct mg_str mg_http_var(struct mg_str buf, struct mg_str name) { + struct mg_str k, v, result = mg_str_n(NULL, 0); + while (mg_split(&buf, &k, &v, '&')) { + if (name.len == k.len && mg_ncasecmp(name.ptr, k.ptr, k.len) == 0) { + result = v; + break; + } + } + return result; +} + +int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst, + size_t dst_len) { + int len; + if (dst == NULL || dst_len == 0) { + len = -2; // Bad destination + } else if (buf->ptr == NULL || name == NULL || buf->len == 0) { + len = -1; // Bad source + dst[0] = '\0'; + } else { + struct mg_str v = mg_http_var(*buf, mg_str(name)); + if (v.ptr == NULL) { + len = -4; // Name does not exist + } else { + len = mg_url_decode(v.ptr, v.len, dst, dst_len, 1); + if (len < 0) len = -3; // Failed to decode + } + } + return len; +} + +static bool isx(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || + (c >= 'A' && c <= 'F'); +} + +int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len, + int is_form_url_encoded) { + size_t i, j; + for (i = j = 0; i < src_len && j + 1 < dst_len; i++, j++) { + if (src[i] == '%') { + // Use `i + 2 < src_len`, not `i < src_len - 2`, note small src_len + if (i + 2 < src_len && isx(src[i + 1]) && isx(src[i + 2])) { + mg_unhex(src + i + 1, 2, (uint8_t *) &dst[j]); + i += 2; + } else { + return -1; + } + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } + if (j < dst_len) dst[j] = '\0'; // Null-terminate the destination + return i >= src_len && j < dst_len ? (int) j : -1; +} + +static bool isok(uint8_t c) { + return c == '\n' || c == '\r' || c >= ' '; +} + +int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) { + size_t i; + for (i = 0; i < buf_len; i++) { + if (!isok(buf[i])) return -1; + if ((i > 0 && buf[i] == '\n' && buf[i - 1] == '\n') || + (i > 3 && buf[i] == '\n' && buf[i - 1] == '\r' && buf[i - 2] == '\n')) + return (int) i + 1; + } + return 0; +} + +static const char *skip(const char *s, const char *e, const char *d, + struct mg_str *v) { + v->ptr = s; + while (s < e && *s != '\n' && strchr(d, *s) == NULL) s++; + v->len = (size_t) (s - v->ptr); + while (s < e && strchr(d, *s) != NULL) s++; + return s; +} + +struct mg_str *mg_http_get_header(struct mg_http_message *h, const char *name) { + size_t i, n = strlen(name), max = sizeof(h->headers) / sizeof(h->headers[0]); + for (i = 0; i < max && h->headers[i].name.len > 0; i++) { + struct mg_str *k = &h->headers[i].name, *v = &h->headers[i].value; + if (n == k->len && mg_ncasecmp(k->ptr, name, n) == 0) return v; + } + return NULL; +} + +static void mg_http_parse_headers(const char *s, const char *end, + struct mg_http_header *h, int max_headers) { + int i; + for (i = 0; i < max_headers; i++) { + struct mg_str k, v, tmp; + const char *he = skip(s, end, "\n", &tmp); + s = skip(s, he, ": \r\n", &k); + s = skip(s, he, "\r\n", &v); + if (k.len == tmp.len) continue; + while (v.len > 0 && v.ptr[v.len - 1] == ' ') v.len--; // Trim spaces + if (k.len == 0) break; + // MG_INFO(("--HH [%.*s] [%.*s] [%.*s]", (int) tmp.len - 1, tmp.ptr, + //(int) k.len, k.ptr, (int) v.len, v.ptr)); + h[i].name = k; + h[i].value = v; + } +} + +int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) { + int is_response, req_len = mg_http_get_request_len((unsigned char *) s, len); + const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL + struct mg_str *cl; + + memset(hm, 0, sizeof(*hm)); + if (req_len <= 0) return req_len; + + hm->message.ptr = hm->head.ptr = s; + hm->body.ptr = end; + hm->head.len = (size_t) req_len; + hm->chunk.ptr = end; + hm->message.len = hm->body.len = (size_t) ~0; // Set body length to infinite + + // Parse request line + s = skip(s, end, " ", &hm->method); + s = skip(s, end, " ", &hm->uri); + s = skip(s, end, "\r\n", &hm->proto); + + // Sanity check. Allow protocol/reason to be empty + if (hm->method.len == 0 || hm->uri.len == 0) return -1; + + // If URI contains '?' character, setup query string + if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) { + hm->query.ptr = qs + 1; + hm->query.len = (size_t) (&hm->uri.ptr[hm->uri.len] - (qs + 1)); + hm->uri.len = (size_t) (qs - hm->uri.ptr); + } + + mg_http_parse_headers(s, end, hm->headers, + sizeof(hm->headers) / sizeof(hm->headers[0])); + if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) { + hm->body.len = (size_t) mg_to64(*cl); + hm->message.len = (size_t) req_len + hm->body.len; + } + + // mg_http_parse() is used to parse both HTTP requests and HTTP + // responses. If HTTP response does not have Content-Length set, then + // body is read until socket is closed, i.e. body.len is infinite (~0). + // + // For HTTP requests though, according to + // http://tools.ietf.org/html/rfc7231#section-8.1.3, + // only POST and PUT methods have defined body semantics. + // Therefore, if Content-Length is not specified and methods are + // not one of PUT or POST, set body length to 0. + // + // So, if it is HTTP request, and Content-Length is not set, + // and method is not (PUT or POST) then reset body length to zero. + is_response = mg_ncasecmp(hm->method.ptr, "HTTP/", 5) == 0; + if (hm->body.len == (size_t) ~0 && !is_response && + mg_vcasecmp(&hm->method, "PUT") != 0 && + mg_vcasecmp(&hm->method, "POST") != 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + // The 204 (No content) responses also have 0 body length + if (hm->body.len == (size_t) ~0 && is_response && + mg_vcasecmp(&hm->uri, "204") == 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + return req_len; +} + +static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt, + va_list *ap) { + size_t len = c->send.len; + mg_send(c, " \r\n", 10); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + if (c->send.len >= len + 10) { + mg_snprintf((char *) c->send.buf + len, 9, "%08lx", c->send.len - len - 10); + c->send.buf[len + 8] = '\r'; + if (c->send.len == len + 10) c->is_resp = 0; // Last chunk, reset marker + } + mg_send(c, "\r\n", 2); +} + +void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_http_vprintf_chunk(c, fmt, &ap); + va_end(ap); +} + +void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) { + mg_printf(c, "%lx\r\n", (unsigned long) len); + mg_send(c, buf, len); + mg_send(c, "\r\n", 2); + if (len == 0) c->is_resp = 0; +} + +// clang-format off +static const char *mg_http_status_code_str(int status_code) { + switch (status_code) { + case 100: return "Continue"; + case 201: return "Created"; + case 202: return "Accepted"; + case 204: return "No Content"; + case 206: return "Partial Content"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 304: return "Not Modified"; + case 400: return "Bad Request"; + case 401: return "Unauthorized"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 418: return "I'm a teapot"; + case 500: return "Internal Server Error"; + case 501: return "Not Implemented"; + default: return "OK"; + } +} +// clang-format on + +void mg_http_reply(struct mg_connection *c, int code, const char *headers, + const char *fmt, ...) { + va_list ap; + size_t len; + mg_printf(c, "HTTP/1.1 %d %s\r\n%sContent-Length: \r\n\r\n", code, + mg_http_status_code_str(code), headers == NULL ? "" : headers); + len = c->send.len; + va_start(ap, fmt); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, &ap); + va_end(ap); + if (c->send.len > 15) { + mg_snprintf((char *) &c->send.buf[len - 14], 11, "%010lu", + (unsigned long) (c->send.len - len)); + c->is_resp = 0; + c->send.buf[len - 4] = '\r'; // Change ending 0 to space + } + c->is_resp = 0; +} + +static void http_cb(struct mg_connection *, int, void *, void *); +static void restore_http_cb(struct mg_connection *c) { + mg_fs_close((struct mg_fd *) c->pfn_data); + c->pfn_data = NULL; + c->pfn = http_cb; + c->is_resp = 0; +} + +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime); +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime) { + mg_snprintf(buf, len, "\"%lld.%lld\"", (int64_t) mtime, (int64_t) size); + return buf; +} + +static void static_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_WRITE || ev == MG_EV_POLL) { + struct mg_fd *fd = (struct mg_fd *) fn_data; + // Read to send IO buffer directly, avoid extra on-stack buffer + size_t n, max = MG_IO_SIZE, space, *cl = (size_t *) c->label; + if (c->send.size < max) mg_iobuf_resize(&c->send, max); + if (c->send.len >= c->send.size) return; // Rate limit + if ((space = c->send.size - c->send.len) > *cl) space = *cl; + n = fd->fs->rd(fd->fd, c->send.buf + c->send.len, space); + c->send.len += n; + *cl -= n; + if (n == 0) restore_http_cb(c); + } else if (ev == MG_EV_CLOSE) { + restore_http_cb(c); + } + (void) ev_data; +} + +// Known mime types. Keep it outside guess_content_type() function, since +// some environments don't like it defined there. +// clang-format off +static struct mg_str s_known_types[] = { + MG_C_STR("html"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("htm"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("css"), MG_C_STR("text/css; charset=utf-8"), + MG_C_STR("js"), MG_C_STR("text/javascript; charset=utf-8"), + MG_C_STR("gif"), MG_C_STR("image/gif"), + MG_C_STR("png"), MG_C_STR("image/png"), + MG_C_STR("jpg"), MG_C_STR("image/jpeg"), + MG_C_STR("jpeg"), MG_C_STR("image/jpeg"), + MG_C_STR("woff"), MG_C_STR("font/woff"), + MG_C_STR("ttf"), MG_C_STR("font/ttf"), + MG_C_STR("svg"), MG_C_STR("image/svg+xml"), + MG_C_STR("txt"), MG_C_STR("text/plain; charset=utf-8"), + MG_C_STR("avi"), MG_C_STR("video/x-msvideo"), + MG_C_STR("csv"), MG_C_STR("text/csv"), + MG_C_STR("doc"), MG_C_STR("application/msword"), + MG_C_STR("exe"), MG_C_STR("application/octet-stream"), + MG_C_STR("gz"), MG_C_STR("application/gzip"), + MG_C_STR("ico"), MG_C_STR("image/x-icon"), + MG_C_STR("json"), MG_C_STR("application/json"), + MG_C_STR("mov"), MG_C_STR("video/quicktime"), + MG_C_STR("mp3"), MG_C_STR("audio/mpeg"), + MG_C_STR("mp4"), MG_C_STR("video/mp4"), + MG_C_STR("mpeg"), MG_C_STR("video/mpeg"), + MG_C_STR("pdf"), MG_C_STR("application/pdf"), + MG_C_STR("shtml"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("tgz"), MG_C_STR("application/tar-gz"), + MG_C_STR("wav"), MG_C_STR("audio/wav"), + MG_C_STR("webp"), MG_C_STR("image/webp"), + MG_C_STR("zip"), MG_C_STR("application/zip"), + MG_C_STR("3gp"), MG_C_STR("video/3gpp"), + {0, 0}, +}; +// clang-format on + +static struct mg_str guess_content_type(struct mg_str path, const char *extra) { + struct mg_str k, v, s = mg_str(extra); + size_t i = 0; + + // Shrink path to its extension only + while (i < path.len && path.ptr[path.len - i - 1] != '.') i++; + path.ptr += path.len - i; + path.len = i; + + // Process user-provided mime type overrides, if any + while (mg_commalist(&s, &k, &v)) { + if (mg_strcmp(path, k) == 0) return v; + } + + // Process built-in mime types + for (i = 0; s_known_types[i].ptr != NULL; i += 2) { + if (mg_strcmp(path, s_known_types[i]) == 0) return s_known_types[i + 1]; + } + + return mg_str("text/plain; charset=utf-8"); +} + +static int getrange(struct mg_str *s, int64_t *a, int64_t *b) { + size_t i, numparsed = 0; + // MG_INFO(("%.*s", (int) s->len, s->ptr)); + for (i = 0; i + 6 < s->len; i++) { + if (memcmp(&s->ptr[i], "bytes=", 6) == 0) { + struct mg_str p = mg_str_n(s->ptr + i + 6, s->len - i - 6); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + *a = mg_to64(p); + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + while (p.len && p.ptr[0] >= '0' && p.ptr[0] <= '9') p.ptr++, p.len--; + if (p.len && p.ptr[0] == '-') p.ptr++, p.len--; + *b = mg_to64(p); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + break; + } + } + return (int) numparsed; +} + +void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm, + const char *path, + const struct mg_http_serve_opts *opts) { + char etag[64], tmp[MG_PATH_MAX]; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_fd *fd = path == NULL ? NULL : mg_fs_open(fs, path, MG_FS_READ); + size_t size = 0; + time_t mtime = 0; + struct mg_str *inm = NULL; + struct mg_str mime = guess_content_type(mg_str(path), opts->mime_types); + bool gzip = false; + + // If file does not exist, we try to open file PATH.gz - and if such + // pre-compressed .gz file exists, serve it with the Content-Encoding: gzip + // Note - we ignore Accept-Encoding, cause we don't have a choice + if (fd == NULL) { + MG_DEBUG(("NULL [%s]", path)); + mg_snprintf(tmp, sizeof(tmp), "%s.gz", path); + if ((fd = mg_fs_open(fs, tmp, MG_FS_READ)) != NULL) { + gzip = true; + path = tmp; + } else if (opts->page404 != NULL) { + // No precompressed file, serve 404 + fd = mg_fs_open(fs, opts->page404, MG_FS_READ); + mime = guess_content_type(mg_str(path), opts->mime_types); + path = opts->page404; + } + } + + if (fd == NULL || fs->st(path, &size, &mtime) == 0) { + mg_http_reply(c, 404, opts->extra_headers, "Not found\n"); + mg_fs_close(fd); + // NOTE: mg_http_etag() call should go first! + } else if (mg_http_etag(etag, sizeof(etag), size, mtime) != NULL && + (inm = mg_http_get_header(hm, "If-None-Match")) != NULL && + mg_vcasecmp(inm, etag) == 0) { + mg_fs_close(fd); + mg_http_reply(c, 304, opts->extra_headers, ""); + } else { + int n, status = 200; + char range[100]; + int64_t r1 = 0, r2 = 0, cl = (int64_t) size; + + // Handle Range header + struct mg_str *rh = mg_http_get_header(hm, "Range"); + range[0] = '\0'; + if (rh != NULL && (n = getrange(rh, &r1, &r2)) > 0 && r1 >= 0 && r2 >= 0) { + // If range is specified like "400-", set second limit to content len + if (n == 1) r2 = cl - 1; + if (r1 > r2 || r2 >= cl) { + status = 416; + cl = 0; + mg_snprintf(range, sizeof(range), "Content-Range: bytes */%lld\r\n", + (int64_t) size); + } else { + status = 206; + cl = r2 - r1 + 1; + mg_snprintf(range, sizeof(range), + "Content-Range: bytes %lld-%lld/%lld\r\n", r1, r1 + cl - 1, + (int64_t) size); + fs->sk(fd->fd, (size_t) r1); + } + } + mg_printf(c, + "HTTP/1.1 %d %s\r\n" + "Content-Type: %.*s\r\n" + "Etag: %s\r\n" + "Content-Length: %llu\r\n" + "%s%s%s\r\n", + status, mg_http_status_code_str(status), (int) mime.len, mime.ptr, + etag, cl, gzip ? "Content-Encoding: gzip\r\n" : "", range, + opts->extra_headers ? opts->extra_headers : ""); + if (mg_vcasecmp(&hm->method, "HEAD") == 0) { + c->is_draining = 1; + c->is_resp = 0; + mg_fs_close(fd); + } else { + c->pfn = static_cb; + c->pfn_data = fd; + *(size_t *) c->label = (size_t) cl; // Track to-be-sent content length + } + } +} + +struct printdirentrydata { + struct mg_connection *c; + struct mg_http_message *hm; + const struct mg_http_serve_opts *opts; + const char *dir; +}; + +static void printdirentry(const char *name, void *userdata) { + struct printdirentrydata *d = (struct printdirentrydata *) userdata; + struct mg_fs *fs = d->opts->fs == NULL ? &mg_fs_posix : d->opts->fs; + size_t size = 0; + time_t t = 0; + char path[MG_PATH_MAX], sz[40], mod[40]; + int flags, n = 0; + + // MG_DEBUG(("[%s] [%s]", d->dir, name)); + if (mg_snprintf(path, sizeof(path), "%s%c%s", d->dir, '/', name) > + sizeof(path)) { + MG_ERROR(("%s truncated", name)); + } else if ((flags = fs->st(path, &size, &t)) == 0) { + MG_ERROR(("%lu stat(%s): %d", d->c->id, path, errno)); + } else { + const char *slash = flags & MG_FS_DIR ? "/" : ""; + if (flags & MG_FS_DIR) { + mg_snprintf(sz, sizeof(sz), "%s", "[DIR]"); + } else { + mg_snprintf(sz, sizeof(sz), "%lld", (uint64_t) size); + } +#if defined(MG_HTTP_DIRLIST_TIME) + char time_str[30]; + struct tm *time_info = localtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#elif defined(MG_HTTP_DIRLIST_TIME_UTC) + char time_str[30]; + struct tm *time_info = gmtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#else + mg_snprintf(mod, sizeof(mod), "%ld", (unsigned long) t); +#endif + n = (int) mg_url_encode(name, strlen(name), path, sizeof(path)); + mg_printf(d->c, + " %s%s" + "%s%s\n", + n, path, slash, name, slash, (unsigned long) t, mod, + flags & MG_FS_DIR ? (int64_t) -1 : (int64_t) size, sz); + } +} + +static void listdir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *dir) { + const char *sort_js_code = + ""; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct printdirentrydata d = {c, hm, opts, dir}; + char tmp[10], buf[MG_PATH_MAX]; + size_t off, n; + int len = mg_url_decode(hm->uri.ptr, hm->uri.len, buf, sizeof(buf), 0); + struct mg_str uri = len > 0 ? mg_str_n(buf, (size_t) len) : hm->uri; + + mg_printf(c, + "HTTP/1.1 200 OK\r\n" + "Content-Type: text/html; charset=utf-8\r\n" + "%s" + "Content-Length: \r\n\r\n", + opts->extra_headers == NULL ? "" : opts->extra_headers); + off = c->send.len; // Start of body + mg_printf(c, + "Index of %.*s%s%s" + "" + "

Index of %.*s

" + "" + "" + "" + "" + "\n", + (int) uri.len, uri.ptr, sort_js_code, sort_js_code2, (int) uri.len, + uri.ptr); + mg_printf(c, "%s", + " " + "\n"); + + fs->ls(dir, printdirentry, &d); + mg_printf(c, + "" + "
Name" + "ModifiedSize
..[DIR]
Mongoose v.%s
\n", + MG_VERSION); + n = mg_snprintf(tmp, sizeof(tmp), "%lu", (unsigned long) (c->send.len - off)); + if (n > sizeof(tmp)) n = 0; + memcpy(c->send.buf + off - 12, tmp, n); // Set content length + c->is_resp = 0; // Mark response end +} + +// Resolve requested file into `path` and return its fs->st() result +static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, struct mg_str url, struct mg_str dir, + char *path, size_t path_size) { + int flags, tmp; + // Append URI to the root_dir, and sanitize it + size_t n = mg_snprintf(path, path_size, "%.*s", (int) dir.len, dir.ptr); + if (n > path_size) n = path_size; + path[path_size - 1] = '\0'; + if (n + 2 < path_size) path[n++] = '/', path[n] = '\0'; + mg_url_decode(hm->uri.ptr + url.len, hm->uri.len - url.len, path + n, + path_size - n, 0); + path[path_size - 1] = '\0'; // Double-check + mg_remove_double_dots(path); + n = strlen(path); + while (n > 1 && path[n - 1] == '/') path[--n] = 0; // Trim trailing slashes + flags = mg_vcmp(&hm->uri, "/") == 0 ? MG_FS_DIR : fs->st(path, NULL, NULL); + MG_VERBOSE(("%lu %.*s -> %s %d", c->id, (int) hm->uri.len, hm->uri.ptr, path, + flags)); + if (flags == 0) { + // Do nothing - let's caller decide + } else if ((flags & MG_FS_DIR) && hm->uri.len > 0 && + hm->uri.ptr[hm->uri.len - 1] != '/') { + mg_printf(c, + "HTTP/1.1 301 Moved\r\n" + "Location: %.*s/\r\n" + "Content-Length: 0\r\n" + "\r\n", + (int) hm->uri.len, hm->uri.ptr); + flags = -1; + } else if (flags & MG_FS_DIR) { + if (((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX) > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0) || + (mg_snprintf(path + n, path_size - n, "/index.shtml") > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0))) { + flags = tmp; + } else if ((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX ".gz") > + 0 && + (tmp = fs->st(path, NULL, NULL)) != + 0)) { // check for gzipped index + flags = tmp; + path[n + 1 + strlen(MG_HTTP_INDEX)] = + '\0'; // Remove appended .gz in index file name + } else { + path[n] = '\0'; // Remove appended index file name + } + } + return flags; +} + +static int uri_to_path(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *path, + size_t path_size) { + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_str k, v, s = mg_str(opts->root_dir), u = {0, 0}, p = {0, 0}; + while (mg_commalist(&s, &k, &v)) { + if (v.len == 0) v = k, k = mg_str("/"); + if (hm->uri.len < k.len) continue; + if (mg_strcmp(k, mg_str_n(hm->uri.ptr, k.len)) != 0) continue; + u = k, p = v; + } + return uri_to_path2(c, hm, fs, u, p, path, path_size); +} + +void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts) { + char path[MG_PATH_MAX]; + const char *sp = opts->ssi_pattern; + int flags = uri_to_path(c, hm, opts, path, sizeof(path)); + if (flags < 0) { + // Do nothing: the response has already been sent by uri_to_path() + } else if (flags & MG_FS_DIR) { + listdir(c, hm, opts, path); + } else if (flags && sp != NULL && + mg_globmatch(sp, strlen(sp), path, strlen(path))) { + mg_http_serve_ssi(c, opts->root_dir, path); + } else { + mg_http_serve_file(c, hm, path, opts); + } +} + +static bool mg_is_url_safe(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || + (c >= 'A' && c <= 'Z') || c == '.' || c == '_' || c == '-' || c == '~'; +} + +size_t mg_url_encode(const char *s, size_t sl, char *buf, size_t len) { + size_t i, n = 0; + for (i = 0; i < sl; i++) { + int c = *(unsigned char *) &s[i]; + if (n + 4 >= len) return 0; + if (mg_is_url_safe(c)) { + buf[n++] = s[i]; + } else { + buf[n++] = '%'; + mg_hex(&s[i], 1, &buf[n]); + n += 2; + } + } + return n; +} + +void mg_http_creds(struct mg_http_message *hm, char *user, size_t userlen, + char *pass, size_t passlen) { + struct mg_str *v = mg_http_get_header(hm, "Authorization"); + user[0] = pass[0] = '\0'; + if (v != NULL && v->len > 6 && memcmp(v->ptr, "Basic ", 6) == 0) { + char buf[256]; + int n = mg_base64_decode(v->ptr + 6, (int) v->len - 6, buf); + const char *p = (const char *) memchr(buf, ':', n > 0 ? (size_t) n : 0); + if (p != NULL) { + mg_snprintf(user, userlen, "%.*s", (int) (p - buf), buf); + mg_snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1); + } + } else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) { + mg_snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7); + } else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) { + struct mg_str t = mg_http_get_header_var(*v, mg_str_n("access_token", 12)); + if (t.len > 0) mg_snprintf(pass, passlen, "%.*s", (int) t.len, t.ptr); + } else { + mg_http_get_var(&hm->query, "access_token", pass, passlen); + } +} + +static struct mg_str stripquotes(struct mg_str s) { + return s.len > 1 && s.ptr[0] == '"' && s.ptr[s.len - 1] == '"' + ? mg_str_n(s.ptr + 1, s.len - 2) + : s; +} + +struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v) { + size_t i; + for (i = 0; v.len > 0 && i + v.len + 2 < s.len; i++) { + if (s.ptr[i + v.len] == '=' && memcmp(&s.ptr[i], v.ptr, v.len) == 0) { + const char *p = &s.ptr[i + v.len + 1], *b = p, *x = &s.ptr[s.len]; + int q = p < x && *p == '"' ? 1 : 0; + while (p < x && + (q ? p == b || *p != '"' : *p != ';' && *p != ' ' && *p != ',')) + p++; + // MG_INFO(("[%.*s] [%.*s] [%.*s]", (int) s.len, s.ptr, (int) v.len, + // v.ptr, (int) (p - b), b)); + return stripquotes(mg_str_n(b, (size_t) (p - b + q))); + } + } + return mg_str_n(NULL, 0); +} + +bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) { + return mg_match(hm->uri, mg_str(glob), NULL); +} + +long mg_http_upload(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, const char *path, size_t max_size) { + char buf[20] = "0"; + long res = 0, offset; + mg_http_get_var(&hm->query, "offset", buf, sizeof(buf)); + offset = strtol(buf, NULL, 0); + if (hm->body.len == 0) { + mg_http_reply(c, 200, "", "%ld", res); // Nothing to write + } else { + struct mg_fd *fd; + size_t current_size = 0; + MG_DEBUG(("%s -> %d bytes @ %ld", path, (int) hm->body.len, offset)); + if (offset == 0) fs->rm(path); // If offset if 0, truncate file + fs->st(path, ¤t_size, NULL); + if (offset < 0) { + mg_http_reply(c, 400, "", "offset required"); + res = -1; + } else if (offset > 0 && current_size != (size_t) offset) { + mg_http_reply(c, 400, "", "%s: offset mismatch", path); + res = -2; + } else if ((size_t) offset + hm->body.len > max_size) { + mg_http_reply(c, 400, "", "%s: over max size of %lu", path, + (unsigned long) max_size); + res = -3; + } else if ((fd = mg_fs_open(fs, path, MG_FS_WRITE)) == NULL) { + mg_http_reply(c, 400, "", "open(%s): %d", path, errno); + res = -4; + } else { + res = offset + (long) fs->wr(fd->fd, hm->body.ptr, hm->body.len); + mg_fs_close(fd); + mg_http_reply(c, 200, "", "%ld", res); + } + } + return res; +} + +int mg_http_status(const struct mg_http_message *hm) { + return atoi(hm->uri.ptr); +} + +// If a server sends data to the client using chunked encoding, Mongoose strips +// off the chunking prefix (hex length and \r\n) and suffix (\r\n), appends the +// stripped data to the body, and fires the MG_EV_HTTP_CHUNK event. When zero +// chunk is received, we fire MG_EV_HTTP_MSG, and the body already has all +// chunking prefixes/suffixes stripped. +// +// If a server sends data without chunked encoding, we also fire a series of +// MG_EV_HTTP_CHUNK events for every received piece of data, and then we fire +// MG_EV_HTTP_MSG event in the end. +// +// We track total processed length in the c->pfn_data, which is a void * +// pointer: we store a size_t value there. +static bool getchunk(struct mg_str s, size_t *prefixlen, size_t *datalen) { + size_t i = 0, n; + while (i < s.len && s.ptr[i] != '\r' && s.ptr[i] != '\n') i++; + n = mg_unhexn(s.ptr, i); + // MG_INFO(("%d %d", (int) (i + n + 4), (int) s.len)); + if (s.len < i + n + 4) return false; // Chunk not yet fully buffered + if (s.ptr[i] != '\r' || s.ptr[i + 1] != '\n') return false; + if (s.ptr[i + n + 2] != '\r' || s.ptr[i + n + 3] != '\n') return false; + *prefixlen = i + 2; + *datalen = n; + return true; +} + +static bool mg_is_chunked(struct mg_http_message *hm) { + const char *needle = "chunked"; + struct mg_str *te = mg_http_get_header(hm, "Transfer-Encoding"); + return te != NULL && mg_vcasecmp(te, needle) == 0; +} + +void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm) { + size_t ofs = (size_t) (hm->chunk.ptr - (char *) c->recv.buf); + mg_iobuf_del(&c->recv, ofs, hm->chunk.len); + c->pfn_data = (void *) ((size_t) c->pfn_data | MG_DMARK); +} + +static void deliver_chunked_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + // | ... headers ... | HEXNUM\r\n ..data.. \r\n | ...... + // +------------------+--------------------------+---- + // | hlen | chunk1 | ...... + char *buf = (char *) &c->recv.buf[hlen], *p = buf; + size_t len = c->recv.len - hlen; + size_t processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t mark, pl, dl, del = 0, ofs = 0; + bool last = false; + if (processed <= len) len -= processed, buf += processed; + while (!last && getchunk(mg_str_n(buf + ofs, len - ofs), &pl, &dl)) { + size_t saved = c->recv.len; + memmove(p + processed, buf + ofs + pl, dl); + // MG_INFO(("P2 [%.*s]", (int) (processed + dl), p)); + hm->chunk = mg_str_n(p + processed, dl); + mg_call(c, MG_EV_HTTP_CHUNK, hm); + ofs += pl + dl + 2, del += pl + 2; // 2 is for \r\n suffix + processed += dl; + if (c->recv.len != saved) processed -= dl, buf -= dl; + mg_hexdump(c->recv.buf, hlen + processed); + last = (dl == 0); + } + mg_iobuf_del(&c->recv, hlen + processed, del); + mark = ((size_t) c->pfn_data) & MG_DMARK; + c->pfn_data = (void *) (processed | mark); + if (last) { + hm->body.len = processed; + hm->message.len = hlen + processed; + c->pfn_data = NULL; + if (mark) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + // MG_INFO(("LAST, mark: %lx", mark)); + // mg_hexdump(c->recv.buf, c->recv.len); + } +} + +static void deliver_normal_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + size_t left, processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t deleted = ((size_t) c->pfn_data) & MG_DMARK; + hm->chunk = mg_str_n((char *) &c->recv.buf[hlen], c->recv.len - hlen); + if (processed <= hm->chunk.len && !deleted) { + hm->chunk.len -= processed; + hm->chunk.ptr += processed; + } + left = hm->body.len < processed ? 0 : hm->body.len - processed; + if (hm->chunk.len > left) hm->chunk.len = left; + if (hm->chunk.len > 0) mg_call(c, MG_EV_HTTP_CHUNK, hm); + processed += hm->chunk.len; + deleted = ((size_t) c->pfn_data) & MG_DMARK; // Re-evaluate after user call + if (processed >= hm->body.len) { // Last, 0-len chunk + hm->chunk.len = 0; // Reset length + mg_call(c, MG_EV_HTTP_CHUNK, hm); // Call user handler + c->pfn_data = NULL; // Reset processed counter + if (processed && deleted) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + } else { + c->pfn_data = (void *) (processed | deleted); // if it is set + } +} + +static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ || ev == MG_EV_CLOSE) { + struct mg_http_message hm; + // mg_hexdump(c->recv.buf, c->recv.len); + while (c->recv.buf != NULL && c->recv.len > 0) { + bool next = false; + int hlen = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm); + if (hlen < 0) { + mg_error(c, "HTTP parse:\n%.*s", (int) c->recv.len, c->recv.buf); + break; + } + if (c->is_resp) break; // Response is still generated + if (hlen == 0) break; // Request is not buffered yet + if (ev == MG_EV_CLOSE) { // If client did not set Content-Length + hm.message.len = c->recv.len; // and closes now, deliver a MSG + hm.body.len = hm.message.len - (size_t) (hm.body.ptr - hm.message.ptr); + } + if (mg_is_chunked(&hm)) { + deliver_chunked_chunks(c, (size_t) hlen, &hm, &next); + } else { + deliver_normal_chunks(c, (size_t) hlen, &hm, &next); + } + if (next) continue; // Chunks & request were deleted + // Chunk events are delivered. If we have full body, deliver MSG + if (c->recv.len < hm.message.len) break; + if (c->is_accepted) c->is_resp = 1; // Start generating response + mg_call(c, MG_EV_HTTP_MSG, &hm); // User handler can clear is_resp + mg_iobuf_del(&c->recv, 0, hm.message.len); + } + } + (void) evd, (void) fnd; +} + +struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/iobuf.c" +#endif + + + + +// Not using memset for zeroing memory, cause it can be dropped by compiler +// See https://github.com/cesanta/mongoose/pull/1265 +static void zeromem(volatile unsigned char *buf, size_t len) { + if (buf != NULL) { + while (len--) *buf++ = 0; + } +} + +static size_t roundup(size_t size, size_t align) { + return align == 0 ? size : (size + align - 1) / align * align; +} + +int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) { + int ok = 1; + new_size = roundup(new_size, io->align); + if (new_size == 0) { + zeromem(io->buf, io->size); + free(io->buf); + io->buf = NULL; + io->len = io->size = 0; + } else if (new_size != io->size) { + // NOTE(lsm): do not use realloc here. Use calloc/free only, to ease the + // porting to some obscure platforms like FreeRTOS + void *p = calloc(1, new_size); + if (p != NULL) { + size_t len = new_size < io->len ? new_size : io->len; + if (len > 0 && io->buf != NULL) memmove(p, io->buf, len); + zeromem(io->buf, io->size); + free(io->buf); + io->buf = (unsigned char *) p; + io->size = new_size; + } else { + ok = 0; + MG_ERROR(("%lld->%lld", (uint64_t) io->size, (uint64_t) new_size)); + } + } + return ok; +} + +int mg_iobuf_init(struct mg_iobuf *io, size_t size, size_t align) { + io->buf = NULL; + io->align = align; + io->size = io->len = 0; + return mg_iobuf_resize(io, size); +} + +size_t mg_iobuf_add(struct mg_iobuf *io, size_t ofs, const void *buf, + size_t len) { + size_t new_size = roundup(io->len + len, io->align); + mg_iobuf_resize(io, new_size); // Attempt to resize + if (new_size != io->size) len = 0; // Resize failure, append nothing + if (ofs < io->len) memmove(io->buf + ofs + len, io->buf + ofs, io->len - ofs); + if (buf != NULL) memmove(io->buf + ofs, buf, len); + if (ofs > io->len) io->len += ofs - io->len; + io->len += len; + return len; +} + +size_t mg_iobuf_del(struct mg_iobuf *io, size_t ofs, size_t len) { + if (ofs > io->len) ofs = io->len; + if (ofs + len > io->len) len = io->len - ofs; + if (io->buf) memmove(io->buf + ofs, io->buf + ofs + len, io->len - ofs - len); + if (io->buf) zeromem(io->buf + io->len - len, len); + io->len -= len; + return len; +} + +void mg_iobuf_free(struct mg_iobuf *io) { + mg_iobuf_resize(io, 0); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/json.c" +#endif + + + + +static const char *escapeseq(int esc) { + return esc ? "\b\f\n\r\t\\\"" : "bfnrt\\\""; +} + +static char json_esc(int c, int esc) { + const char *p, *esc1 = escapeseq(esc), *esc2 = escapeseq(!esc); + for (p = esc1; *p != '\0'; p++) { + if (*p == c) return esc2[p - esc1]; + } + return 0; +} + +static int mg_pass_string(const char *s, int len) { + int i; + for (i = 0; i < len; i++) { + if (s[i] == '\\' && i + 1 < len && json_esc(s[i + 1], 1)) { + i++; + } else if (s[i] == '\0') { + return MG_JSON_INVALID; + } else if (s[i] == '"') { + return i; + } + } + return MG_JSON_INVALID; +} + +static double mg_atod(const char *p, int len, int *numlen) { + double d = 0.0; + int i = 0, sign = 1; + + // Sign + if (i < len && *p == '-') { + sign = -1, i++; + } else if (i < len && *p == '+') { + i++; + } + + // Decimal + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + d *= 10.0; + d += p[i] - '0'; + } + d *= sign; + + // Fractional + if (i < len && p[i] == '.') { + double frac = 0.0, base = 0.1; + i++; + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + frac += base * (p[i] - '0'); + base /= 10.0; + } + d += frac * sign; + } + + // Exponential + if (i < len && (p[i] == 'e' || p[i] == 'E')) { + int j, exp = 0, minus = 0; + i++; + if (i < len && p[i] == '-') minus = 1, i++; + if (i < len && p[i] == '+') i++; + while (i < len && p[i] >= '0' && p[i] <= '9' && exp < 308) + exp = exp * 10 + (p[i++] - '0'); + if (minus) exp = -exp; + for (j = 0; j < exp; j++) d *= 10.0; + for (j = 0; j < -exp; j++) d /= 10.0; + } + + if (numlen != NULL) *numlen = i; + return d; +} + +int mg_json_get(struct mg_str json, const char *path, int *toklen) { + const char *s = json.ptr; + int len = (int) json.len; + enum { S_VALUE, S_KEY, S_COLON, S_COMMA_OR_EOO } expecting = S_VALUE; + unsigned char nesting[MG_JSON_MAX_DEPTH]; + int i = 0; // Current offset in `s` + int j = 0; // Offset in `s` we're looking for (return value) + int depth = 0; // Current depth (nesting level) + int ed = 0; // Expected depth + int pos = 1; // Current position in `path` + int ci = -1, ei = -1; // Current and expected index in array + + if (toklen) *toklen = 0; + if (path[0] != '$') return MG_JSON_INVALID; + +#define MG_CHECKRET(x) \ + do { \ + if (depth == ed && path[pos] == '\0' && ci == ei) { \ + if (toklen) *toklen = i - j + 1; \ + return j; \ + } \ + } while (0) + +// In the ascii table, the distance between `[` and `]` is 2. +// Ditto for `{` and `}`. Hence +2 in the code below. +#define MG_EOO(x) \ + do { \ + if (depth == ed && ci != ei) return MG_JSON_NOT_FOUND; \ + if (c != nesting[depth - 1] + 2) return MG_JSON_INVALID; \ + depth--; \ + MG_CHECKRET(x); \ + } while (0) + + for (i = 0; i < len; i++) { + unsigned char c = ((unsigned char *) s)[i]; + if (c == ' ' || c == '\t' || c == '\n' || c == '\r') continue; + switch (expecting) { + case S_VALUE: + // p("V %s [%.*s] %d %d %d %d\n", path, pos, path, depth, ed, ci, ei); + if (depth == ed) j = i; + if (c == '{') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '.' && ci == ei) { + // If we start the object, reset array indices + ed++, pos++, ci = ei = -1; + } + nesting[depth++] = c; + expecting = S_KEY; + break; + } else if (c == '[') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '[' && ei == ci) { + ed++, pos++, ci = 0; + for (ei = 0; path[pos] != ']' && path[pos] != '\0'; pos++) { + ei *= 10; + ei += path[pos] - '0'; + } + if (path[pos] != 0) pos++; + } + nesting[depth++] = c; + break; + } else if (c == ']' && depth > 0) { // Empty array + MG_EOO(']'); + } else if (c == 't' && i + 3 < len && memcmp(&s[i], "true", 4) == 0) { + i += 3; + } else if (c == 'n' && i + 3 < len && memcmp(&s[i], "null", 4) == 0) { + i += 3; + } else if (c == 'f' && i + 4 < len && memcmp(&s[i], "false", 5) == 0) { + i += 4; + } else if (c == '-' || ((c >= '0' && c <= '9'))) { + int numlen = 0; + mg_atod(&s[i], len - i, &numlen); + i += numlen - 1; + } else if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + i += n + 1; + } else { + return MG_JSON_INVALID; + } + MG_CHECKRET('V'); + if (depth == ed && ei >= 0) ci++; + expecting = S_COMMA_OR_EOO; + break; + + case S_KEY: + if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + if (i + 1 + n >= len) return MG_JSON_NOT_FOUND; + if (depth < ed) return MG_JSON_NOT_FOUND; + if (depth == ed && path[pos - 1] != '.') return MG_JSON_NOT_FOUND; + // printf("K %s [%.*s] [%.*s] %d %d %d\n", path, pos, path, n, + // &s[i + 1], n, depth, ed); + // NOTE(cpq): in the check sequence below is important. + // strncmp() must go first: it fails fast if the remaining length of + // the path is smaller than `n`. + if (depth == ed && path[pos - 1] == '.' && + strncmp(&s[i + 1], &path[pos], (size_t) n) == 0 && + (path[pos + n] == '\0' || path[pos + n] == '.' || + path[pos + n] == '[')) { + pos += n; + } + i += n + 1; + expecting = S_COLON; + } else if (c == '}') { // Empty object + MG_EOO('}'); + expecting = S_COMMA_OR_EOO; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COLON: + if (c == ':') { + expecting = S_VALUE; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COMMA_OR_EOO: + if (depth <= 0) { + return MG_JSON_INVALID; + } else if (c == ',') { + expecting = (nesting[depth - 1] == '{') ? S_KEY : S_VALUE; + } else if (c == ']' || c == '}') { + MG_EOO('O'); + if (depth == ed && ei >= 0) ci++; + } else { + return MG_JSON_INVALID; + } + break; + } + } + return MG_JSON_NOT_FOUND; +} + +bool mg_json_get_num(struct mg_str json, const char *path, double *v) { + int n, toklen, found = 0; + if ((n = mg_json_get(json, path, &toklen)) >= 0 && + (json.ptr[n] == '-' || (json.ptr[n] >= '0' && json.ptr[n] <= '9'))) { + if (v != NULL) *v = mg_atod(json.ptr + n, toklen, NULL); + found = 1; + } + return found; +} + +bool mg_json_get_bool(struct mg_str json, const char *path, bool *v) { + int found = 0, off = mg_json_get(json, path, NULL); + if (off >= 0 && (json.ptr[off] == 't' || json.ptr[off] == 'f')) { + if (v != NULL) *v = json.ptr[off] == 't'; + found = 1; + } + return found; +} + +static bool json_unescape(const char *s, size_t len, char *to, size_t n) { + size_t i, j; + for (i = 0, j = 0; i < len && j < n; i++, j++) { + if (s[i] == '\\' && i + 5 < len && s[i + 1] == 'u') { + // \uXXXX escape. We could process a simple one-byte chars + // \u00xx from the ASCII range. More complex chars would require + // dragging in a UTF8 library, which is too much for us + if (s[i + 2] != '0' || s[i + 3] != '0') return false; // Give up + ((unsigned char *) to)[j] = (unsigned char) mg_unhexn(s + i + 4, 2); + + i += 5; + } else if (s[i] == '\\' && i + 1 < len) { + char c = json_esc(s[i + 1], 0); + if (c == 0) return false; + to[j] = c; + i++; + } else { + to[j] = s[i]; + } + } + if (j >= n) return false; + if (n > 0) to[j] = '\0'; + return true; +} + +char *mg_json_get_str(struct mg_str json, const char *path) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && len > 1 && json.ptr[off] == '"') { + if ((result = (char *) calloc(1, (size_t) len)) != NULL && + !json_unescape(json.ptr + off + 1, (size_t) (len - 2), result, + (size_t) len)) { + free(result); + result = NULL; + } + } + return result; +} + +char *mg_json_get_b64(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len)) != NULL) { + int k = mg_base64_decode(json.ptr + off + 1, len - 2, result); + if (slen != NULL) *slen = k; + } + return result; +} + +char *mg_json_get_hex(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len / 2)) != NULL) { + mg_unhex(json.ptr + off + 1, (size_t) (len - 2), (uint8_t *) result); + result[len / 2 - 1] = '\0'; + if (slen != NULL) *slen = len / 2 - 1; + } + return result; +} + +long mg_json_get_long(struct mg_str json, const char *path, long dflt) { + double dv; + long result = dflt; + if (mg_json_get_num(json, path, &dv)) result = (long) dv; + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/log.c" +#endif + + + + + +static void default_logger(char c, void *param) { + putchar(c); + (void) c, (void) param; +} + +static int s_level = MG_LL_INFO; +static mg_pfn_t s_log_func = default_logger; +static void *s_log_func_param = NULL; + +void mg_log_set_fn(mg_pfn_t fn, void *param) { + s_log_func = fn; + s_log_func_param = param; +} + +static void logc(unsigned char c) { + s_log_func((char) c, s_log_func_param); +} + +static void logs(const char *buf, size_t len) { + size_t i; + for (i = 0; i < len; i++) logc(((unsigned char *) buf)[i]); +} + +void mg_log_set(int log_level) { + MG_DEBUG(("Setting log level to %d", log_level)); + s_level = log_level; +} + +bool mg_log_prefix(int level, const char *file, int line, const char *fname) { + if (level <= s_level) { + const char *p = strrchr(file, '/'); + char buf[41]; + size_t n; + if (p == NULL) p = strrchr(file, '\\'); + n = mg_snprintf(buf, sizeof(buf), "%llx %d %s:%d:%s", mg_millis(), level, + p == NULL ? file : p + 1, line, fname); + if (n > sizeof(buf) - 2) n = sizeof(buf) - 2; + while (n < sizeof(buf)) buf[n++] = ' '; + logs(buf, n - 1); + return true; + } else { + return false; + } +} + +void mg_log(const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_vxprintf(s_log_func, s_log_func_param, fmt, &ap); + va_end(ap); + logc((unsigned char) '\n'); +} + +static unsigned char nibble(unsigned c) { + return (unsigned char) (c < 10 ? c + '0' : c + 'W'); +} + +#define ISPRINT(x) ((x) >= ' ' && (x) <= '~') +void mg_hexdump(const void *buf, size_t len) { + const unsigned char *p = (const unsigned char *) buf; + unsigned char ascii[16], alen = 0; + size_t i; + for (i = 0; i < len; i++) { + if ((i % 16) == 0) { + // Print buffered ascii chars + if (i > 0) logs(" ", 2), logs((char *) ascii, 16), logc('\n'), alen = 0; + // Print hex address, then \t + logc(nibble((i >> 12) & 15)), logc(nibble((i >> 8) & 15)), + logc(nibble((i >> 4) & 15)), logc('0'), logs(" ", 3); + } + logc(nibble(p[i] >> 4)), logc(nibble(p[i] & 15)); // Two nibbles, e.g. c5 + logc(' '); // Space after hex number + ascii[alen++] = ISPRINT(p[i]) ? p[i] : '.'; // Add to the ascii buf + } + while (alen < 16) logs(" ", 3), ascii[alen++] = ' '; + logs(" ", 2), logs((char *) ascii, 16), logc('\n'); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/md5.c" +#endif + + + +#if defined(MG_ENABLE_MD5) && MG_ENABLE_MD5 + +static void mg_byte_reverse(unsigned char *buf, unsigned longs) { + if (MG_BIG_ENDIAN) { + do { + uint32_t t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32_t *) buf = t; + buf += 4; + } while (--longs); + } else { + (void) buf, (void) longs; // Little endian. Do nothing + } +} + +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +#define MD5STEP(f, w, x, y, z, data, s) \ + (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void mg_md5_init(mg_md5_ctx *ctx) { + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +static void mg_md5_transform(uint32_t buf[4], uint32_t const in[16]) { + uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +void mg_md5_update(mg_md5_ctx *ctx, const unsigned char *buf, size_t len) { + uint32_t t; + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++; + ctx->bits[1] += (uint32_t) len >> 29; + + t = (t >> 3) & 0x3f; + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + memcpy(ctx->in, buf, len); +} + +void mg_md5_final(mg_md5_ctx *ctx, unsigned char digest[16]) { + unsigned count; + unsigned char *p; + uint32_t *a; + + count = (ctx->bits[0] >> 3) & 0x3F; + + p = ctx->in + count; + *p++ = 0x80; + count = 64 - 1 - count; + if (count < 8) { + memset(p, 0, count); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + memset(ctx->in, 0, 56); + } else { + memset(p, 0, count - 8); + } + mg_byte_reverse(ctx->in, 14); + + a = (uint32_t *) ctx->in; + a[14] = ctx->bits[0]; + a[15] = ctx->bits[1]; + + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + mg_byte_reverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset((char *) ctx, 0, sizeof(*ctx)); +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/mqtt.c" +#endif + + + + + + + + +#define MQTT_CLEAN_SESSION 0x02 +#define MQTT_HAS_WILL 0x04 +#define MQTT_WILL_RETAIN 0x20 +#define MQTT_HAS_PASSWORD 0x40 +#define MQTT_HAS_USER_NAME 0x80 + +void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags, + uint32_t len) { + uint8_t buf[1 + sizeof(len)], *vlen = &buf[1]; + buf[0] = (uint8_t) ((cmd << 4) | flags); + do { + *vlen = len % 0x80; + len /= 0x80; + if (len > 0) *vlen |= 0x80; + vlen++; + } while (len > 0 && vlen < &buf[sizeof(buf)]); + mg_send(c, buf, (size_t) (vlen - buf)); +} + +static void mg_send_u16(struct mg_connection *c, uint16_t value) { + mg_send(c, &value, sizeof(value)); +} + +void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) { + char rnd[10], client_id[21], zero = 0; + struct mg_str cid = opts->client_id; + uint32_t total_len = 7 + 1 + 2 + 2; + uint8_t hdr[8] = {0, 4, 'M', 'Q', 'T', 'T', opts->version, 0}; + + if (cid.len == 0) { + mg_random(rnd, sizeof(rnd)); + mg_hex(rnd, sizeof(rnd), client_id); + client_id[sizeof(client_id) - 1] = '\0'; + cid = mg_str(client_id); + } + + if (hdr[6] == 0) hdr[6] = 4; // If version is not set, use 4 (3.1.1) + c->is_mqtt5 = hdr[6] == 5; // Set version 5 flag + hdr[7] = (uint8_t) ((opts->will_qos & 3) << 3); // Connection flags + if (opts->user.len > 0) { + total_len += 2 + (uint32_t) opts->user.len; + hdr[7] |= MQTT_HAS_USER_NAME; + } + if (opts->pass.len > 0) { + total_len += 2 + (uint32_t) opts->pass.len; + hdr[7] |= MQTT_HAS_PASSWORD; + } + if (opts->will_topic.len > 0 && opts->will_message.len > 0) { + total_len += + 4 + (uint32_t) opts->will_topic.len + (uint32_t) opts->will_message.len; + hdr[7] |= MQTT_HAS_WILL; + } + if (opts->clean || cid.len == 0) hdr[7] |= MQTT_CLEAN_SESSION; + if (opts->will_retain) hdr[7] |= MQTT_WILL_RETAIN; + total_len += (uint32_t) cid.len; + if (c->is_mqtt5) total_len += 1U + (hdr[7] & MQTT_HAS_WILL ? 1U : 0); + + mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len); + mg_send(c, hdr, sizeof(hdr)); + // keepalive == 0 means "do not disconnect us!" + mg_send_u16(c, mg_htons((uint16_t) opts->keepalive)); + + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // V5 properties + mg_send_u16(c, mg_htons((uint16_t) cid.len)); + mg_send(c, cid.ptr, cid.len); + + if (hdr[7] & MQTT_HAS_WILL) { + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // will props + mg_send_u16(c, mg_htons((uint16_t) opts->will_topic.len)); + mg_send(c, opts->will_topic.ptr, opts->will_topic.len); + mg_send_u16(c, mg_htons((uint16_t) opts->will_message.len)); + mg_send(c, opts->will_message.ptr, opts->will_message.len); + } + if (opts->user.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->user.len)); + mg_send(c, opts->user.ptr, opts->user.len); + } + if (opts->pass.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->pass.len)); + mg_send(c, opts->pass.ptr, opts->pass.len); + } +} + +void mg_mqtt_pub(struct mg_connection *c, struct mg_str topic, + struct mg_str data, int qos, bool retain) { + uint8_t flags = (uint8_t) (((qos & 3) << 1) | (retain ? 1 : 0)), zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + (uint32_t) data.len; + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) topic.len, (char *) topic.ptr, + (int) data.len, (char *) data.ptr)); + if (qos > 0) len += 2; + if (c->is_mqtt5) len++; + mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, len); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + if (qos > 0) { + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + } + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send(c, data.ptr, data.len); +} + +void mg_mqtt_sub(struct mg_connection *c, struct mg_str topic, int qos) { + uint8_t qos_ = qos & 3, zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + 2 + 1 + (c->is_mqtt5 ? 1 : 0); + mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, 2, len); + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + mg_send(c, &qos_, sizeof(qos_)); +} + +int mg_mqtt_parse(const uint8_t *buf, size_t len, uint8_t version, + struct mg_mqtt_message *m) { + uint8_t lc = 0, *p, *end; + uint32_t n = 0, len_len = 0; + + memset(m, 0, sizeof(*m)); + m->dgram.ptr = (char *) buf; + if (len < 2) return MQTT_INCOMPLETE; + m->cmd = (uint8_t) (buf[0] >> 4); + m->qos = (buf[0] >> 1) & 3; + + n = len_len = 0; + p = (uint8_t *) buf + 1; + while ((size_t) (p - buf) < len) { + lc = *((uint8_t *) p++); + n += (uint32_t) ((lc & 0x7f) << 7 * len_len); + len_len++; + if (!(lc & 0x80)) break; + if (len_len >= 4) return MQTT_MALFORMED; + } + end = p + n; + if ((lc & 0x80) || (end > buf + len)) return MQTT_INCOMPLETE; + m->dgram.len = (size_t) (end - buf); + + switch (m->cmd) { + case MQTT_CMD_CONNACK: + if (end - p < 2) return MQTT_MALFORMED; + m->ack = p[1]; + break; + case MQTT_CMD_PUBACK: + case MQTT_CMD_PUBREC: + case MQTT_CMD_PUBREL: + case MQTT_CMD_PUBCOMP: + case MQTT_CMD_SUBSCRIBE: + case MQTT_CMD_SUBACK: + case MQTT_CMD_UNSUBSCRIBE: + case MQTT_CMD_UNSUBACK: + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + break; + case MQTT_CMD_PUBLISH: { + if (p + 2 > end) return MQTT_MALFORMED; + m->topic.len = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + m->topic.ptr = (char *) p + 2; + p += 2 + m->topic.len; + if (p > end) return MQTT_MALFORMED; + if (m->qos > 0) { + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + } + if (p >= end) return MQTT_MALFORMED; + if (version == 5) p += 1 + p[0]; // Skip options + if (p > end) return MQTT_MALFORMED; + m->data.ptr = (char *) p; + m->data.len = (size_t) (end - p); + break; + } + default: + break; + } + return MQTT_OK; +} + +static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_READ) { + for (;;) { + uint8_t version = c->is_mqtt5 ? 5 : 4; + struct mg_mqtt_message mm; + int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, version, &mm); + if (rc == MQTT_MALFORMED) { + MG_ERROR(("%lu MQTT malformed message", c->id)); + c->is_closing = 1; + break; + } else if (rc == MQTT_OK) { + MG_VERBOSE(("%lu MQTT CMD %d len %d [%.*s]", c->id, mm.cmd, + (int) mm.dgram.len, (int) mm.data.len, mm.data.ptr)); + switch (mm.cmd) { + case MQTT_CMD_CONNACK: + mg_call(c, MG_EV_MQTT_OPEN, &mm.ack); + if (mm.ack == 0) { + MG_DEBUG(("%lu Connected", c->id)); + } else { + MG_ERROR(("%lu MQTT auth failed, code %d", c->id, mm.ack)); + c->is_closing = 1; + } + break; + case MQTT_CMD_PUBLISH: { + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len, + mm.topic.ptr, (int) mm.data.len, mm.data.ptr)); + if (mm.qos > 0) { + uint16_t id = mg_htons(mm.id); + mg_mqtt_send_header(c, MQTT_CMD_PUBACK, 0, sizeof(id)); + mg_send(c, &id, sizeof(id)); + } + mg_call(c, MG_EV_MQTT_MSG, &mm); + break; + } + } + mg_call(c, MG_EV_MQTT_CMD, &mm); + mg_iobuf_del(&c->recv, 0, mm.dgram.len); + } else { + break; + } + } + } + (void) ev_data; + (void) fn_data; +} + +void mg_mqtt_ping(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGREQ, 0, 0); +} + +void mg_mqtt_pong(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGRESP, 0, 0); +} + +void mg_mqtt_disconnect(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_DISCONNECT, 0, 0); +} + +struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url, + const struct mg_mqtt_opts *opts, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) { + struct mg_mqtt_opts empty; + memset(&empty, 0, sizeof(empty)); + mg_mqtt_login(c, opts == NULL ? &empty : opts); + c->pfn = mqtt_cb; + } + return c; +} + +struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/net.c" +#endif + + + + + + + +size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list *ap) { + size_t old = c->send.len; + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + return c->send.len - old; +} + +size_t mg_printf(struct mg_connection *c, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vprintf(c, fmt, &ap); + va_end(ap); + return len; +} + +char *mg_straddr(struct mg_addr *a, char *buf, size_t len) { + char tmp[30]; + const char *fmt = a->is_ip6 ? "[%s]:%d" : "%s:%d"; + mg_ntoa(a, tmp, sizeof(tmp)); + mg_snprintf(buf, len, fmt, tmp, (int) mg_ntohs(a->port)); + return buf; +} + +char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) { + if (addr->is_ip6) { + uint16_t *p = (uint16_t *) addr->ip6; + mg_snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x", mg_htons(p[0]), + mg_htons(p[1]), mg_htons(p[2]), mg_htons(p[3]), mg_htons(p[4]), + mg_htons(p[5]), mg_htons(p[6]), mg_htons(p[7])); + } else { + uint8_t p[4]; + memcpy(p, &addr->ip, sizeof(p)); + mg_snprintf(buf, len, "%d.%d.%d.%d", (int) p[0], (int) p[1], (int) p[2], + (int) p[3]); + } + return buf; +} + +static bool mg_atonl(struct mg_str str, struct mg_addr *addr) { + if (mg_vcasecmp(&str, "localhost") != 0) return false; + addr->ip = mg_htonl(0x7f000001); + addr->is_ip6 = false; + return true; +} + +static bool mg_atone(struct mg_str str, struct mg_addr *addr) { + if (str.len > 0) return false; + addr->ip = 0; + addr->is_ip6 = false; + return true; +} + +static bool mg_aton4(struct mg_str str, struct mg_addr *addr) { + uint8_t data[4] = {0, 0, 0, 0}; + size_t i, num_dots = 0; + for (i = 0; i < str.len; i++) { + if (str.ptr[i] >= '0' && str.ptr[i] <= '9') { + int octet = data[num_dots] * 10 + (str.ptr[i] - '0'); + if (octet > 255) return false; + data[num_dots] = (uint8_t) octet; + } else if (str.ptr[i] == '.') { + if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false; + num_dots++; + } else { + return false; + } + } + if (num_dots != 3 || str.ptr[i - 1] == '.') return false; + memcpy(&addr->ip, data, sizeof(data)); + addr->is_ip6 = false; + return true; +} + +static bool mg_v4mapped(struct mg_str str, struct mg_addr *addr) { + int i; + if (str.len < 14) return false; + if (str.ptr[0] != ':' || str.ptr[1] != ':' || str.ptr[6] != ':') return false; + for (i = 2; i < 6; i++) { + if (str.ptr[i] != 'f' && str.ptr[i] != 'F') return false; + } + if (!mg_aton4(mg_str_n(&str.ptr[7], str.len - 7), addr)) return false; + memset(addr->ip6, 0, sizeof(addr->ip6)); + addr->ip6[10] = addr->ip6[11] = 255; + memcpy(&addr->ip6[12], &addr->ip, 4); + addr->is_ip6 = true; + return true; +} + +static bool mg_aton6(struct mg_str str, struct mg_addr *addr) { + size_t i, j = 0, n = 0, dc = 42; + if (str.len > 2 && str.ptr[0] == '[') str.ptr++, str.len -= 2; + if (mg_v4mapped(str, addr)) return true; + for (i = 0; i < str.len; i++) { + if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') || + (str.ptr[i] >= 'a' && str.ptr[i] <= 'f') || + (str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) { + unsigned long val; + if (i > j + 3) return false; + // MG_DEBUG(("%zu %zu [%.*s]", i, j, (int) (i - j + 1), &str.ptr[j])); + val = mg_unhexn(&str.ptr[j], i - j + 1); + addr->ip6[n] = (uint8_t) ((val >> 8) & 255); + addr->ip6[n + 1] = (uint8_t) (val & 255); + } else if (str.ptr[i] == ':') { + j = i + 1; + if (i > 0 && str.ptr[i - 1] == ':') { + dc = n; // Double colon + if (i > 1 && str.ptr[i - 2] == ':') return false; + } else if (i > 0) { + n += 2; + } + if (n > 14) return false; + addr->ip6[n] = addr->ip6[n + 1] = 0; // For trailing :: + } else { + return false; + } + } + if (n < 14 && dc == 42) return false; + if (n < 14) { + memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2); + memset(&addr->ip6[dc], 0, 14 - n); + } + addr->is_ip6 = true; + return true; +} + +bool mg_aton(struct mg_str str, struct mg_addr *addr) { + // MG_INFO(("[%.*s]", (int) str.len, str.ptr)); + return mg_atone(str, addr) || mg_atonl(str, addr) || mg_aton4(str, addr) || + mg_aton6(str, addr); +} + +struct mg_connection *mg_alloc_conn(struct mg_mgr *mgr) { + struct mg_connection *c = + (struct mg_connection *) calloc(1, sizeof(*c) + mgr->extraconnsize); + if (c != NULL) { + c->mgr = mgr; + c->send.align = c->recv.align = MG_IO_SIZE; + c->id = ++mgr->nextid; + } + return c; +} + +void mg_close_conn(struct mg_connection *c) { + mg_resolve_cancel(c); // Close any pending DNS query + LIST_DELETE(struct mg_connection, &c->mgr->conns, c); + if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL; + if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL; + // Order of operations is important. `MG_EV_CLOSE` event must be fired + // before we deallocate received data, see #1331 + mg_call(c, MG_EV_CLOSE, NULL); + MG_DEBUG(("%lu %p closed", c->id, c->fd)); + + mg_tls_free(c); + mg_iobuf_free(&c->recv); + mg_iobuf_free(&c->send); + memset(c, 0, sizeof(*c)); + free(c); +} + +struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if (url == NULL || url[0] == '\0') { + MG_ERROR(("null url")); + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM")); + } else { + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->is_udp = (strncmp(url, "udp:", 4) == 0); + c->fn = fn; + c->is_client = true; + c->fn_data = fn_data; + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + mg_call(c, MG_EV_OPEN, NULL); + mg_resolve(c, url); + } + return c; +} + +struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM %s", url)); + } else if (!mg_open_listener(c, url)) { + MG_ERROR(("Failed: %s, errno %d", url, errno)); + free(c); + c = NULL; + } else { + c->is_listening = 1; + c->is_udp = strncmp(url, "udp:", 4) == 0; + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fn = fn; + c->fn_data = fn_data; + mg_call(c, MG_EV_OPEN, NULL); + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + } + return c; +} + +struct mg_connection *mg_wrapfd(struct mg_mgr *mgr, int fd, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_alloc_conn(mgr); + if (c != NULL) { + c->fd = (void *) (size_t) fd; + c->fn = fn; + c->fn_data = fn_data; + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_OPEN, NULL); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + } + return c; +} + +struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds, + unsigned flags, void (*fn)(void *), void *arg) { + struct mg_timer *t = (struct mg_timer *) calloc(1, sizeof(*t)); + if (t != NULL) { + mg_timer_init(&mgr->timers, t, milliseconds, flags, fn, arg); + t->id = mgr->timerid++; + } + return t; +} + +void mg_mgr_free(struct mg_mgr *mgr) { + struct mg_connection *c; + struct mg_timer *tmp, *t = mgr->timers; + while (t != NULL) tmp = t->next, free(t), t = tmp; + mgr->timers = NULL; // Important. Next call to poll won't touch timers + for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1; + mg_mgr_poll(mgr, 0); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_DeleteSocketSet(mgr->ss); +#endif + MG_DEBUG(("All connections closed")); +#if MG_ENABLE_EPOLL + if (mgr->epoll_fd >= 0) close(mgr->epoll_fd), mgr->epoll_fd = -1; +#endif + free(mgr->priv); +} + +void mg_mgr_init(struct mg_mgr *mgr) { + memset(mgr, 0, sizeof(*mgr)); +#if MG_ENABLE_EPOLL + if ((mgr->epoll_fd = epoll_create1(0)) < 0) MG_ERROR(("epoll: %d", errno)); +#else + mgr->epoll_fd = -1; +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + // clang-format off + { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } + // clang-format on +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + mgr->ss = FreeRTOS_CreateSocketSet(); +#elif defined(__unix) || defined(__unix__) || defined(__APPLE__) + // Ignore SIGPIPE signal, so if client cancels the request, it + // won't kill the whole process. + signal(SIGPIPE, SIG_IGN); +#endif + mgr->dnstimeout = 3000; + mgr->dns4.url = "udp://8.8.8.8:53"; + mgr->dns6.url = "udp://[2001:4860:4860::8888]:53"; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/rpc.c" +#endif + + +void mg_rpc_add(struct mg_rpc **head, struct mg_str method, + void (*fn)(struct mg_rpc_req *), void *fn_data) { + struct mg_rpc *rpc = (struct mg_rpc *) calloc(1, sizeof(*rpc)); + if (rpc != NULL) { + rpc->method = mg_strdup(method), rpc->fn = fn, rpc->fn_data = fn_data; + rpc->next = *head, *head = rpc; + } +} + +void mg_rpc_del(struct mg_rpc **head, void (*fn)(struct mg_rpc_req *)) { + struct mg_rpc *r; + while ((r = *head) != NULL) { + if (r->fn == fn || fn == NULL) { + *head = r->next; + free((void *) r->method.ptr); + free(r); + } else { + head = &(*head)->next; + } + } +} + +static void mg_rpc_call(struct mg_rpc_req *r, struct mg_str method) { + struct mg_rpc *h = r->head == NULL ? NULL : *r->head; + while (h != NULL && !mg_match(method, h->method, NULL)) h = h->next; + if (h != NULL) { + r->rpc = h; + h->fn(r); + } else { + mg_rpc_err(r, -32601, "\"%.*s not found\"", (int) method.len, method.ptr); + } +} + +void mg_rpc_process(struct mg_rpc_req *r) { + int len, off = mg_json_get(r->frame, "$.method", &len); + if (off > 0 && r->frame.ptr[off] == '"') { + struct mg_str method = mg_str_n(&r->frame.ptr[off + 1], (size_t) len - 2); + mg_rpc_call(r, method); + } else if ((off = mg_json_get(r->frame, "$.result", &len)) > 0 || + (off = mg_json_get(r->frame, "$.error", &len)) > 0) { + mg_rpc_call(r, mg_str("")); // JSON response! call "" method handler + } else { + mg_rpc_err(r, -32700, "%.*Q", (int) r->frame.len, r->frame.ptr); // Invalid + } +} + +void mg_rpc_vok(struct mg_rpc_req *r, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "{%Q:%.*s,%Q:", "id", len, + &r->frame.ptr[off], "result"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}"); + } +} + +void mg_rpc_ok(struct mg_rpc_req *r, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_vok(r, fmt, &ap); + va_end(ap); +} + +void mg_rpc_verr(struct mg_rpc_req *r, int code, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + mg_xprintf(r->pfn, r->pfn_data, "{"); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "%Q:%.*s,", "id", len, &r->frame.ptr[off]); + } + mg_xprintf(r->pfn, r->pfn_data, "%Q:{%Q:%d,%Q:", "error", "code", code, + "message"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}}"); +} + +void mg_rpc_err(struct mg_rpc_req *r, int code, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_verr(r, code, fmt, &ap); + va_end(ap); +} + +static size_t print_methods(mg_pfn_t pfn, void *pfn_data, va_list *ap) { + struct mg_rpc *h, **head = (struct mg_rpc **) va_arg(*ap, void **); + size_t len = 0; + for (h = *head; h != NULL; h = h->next) { + len += mg_xprintf(pfn, pfn_data, "%s%.*Q", h == *head ? "" : ",", + (int) h->method.len, h->method.ptr); + } + return len; +} + +void mg_rpc_list(struct mg_rpc_req *r) { + mg_rpc_ok(r, "[%M]", print_methods, r->head); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sha1.c" +#endif +/* Copyright(c) By Steve Reid */ +/* 100% Public Domain */ + + + +union char64long16 { + unsigned char c[64]; + uint32_t l[16]; +}; + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { + if (MG_BIG_ENDIAN) { + } else { + block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | + (rol(block->l[i], 8) & 0x00FF00FF); + } + return block->l[i]; +} + +/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ +#undef blk +#undef R0 +#undef R1 +#undef R2 +#undef R3 +#undef R4 + +#define blk(i) \ + (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \ + block->l[(i + 2) & 15] ^ block->l[i & 15], \ + 1)) +#define R0(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R1(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R2(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ + w = rol(w, 30); +#define R3(v, w, x, y, z, i) \ + z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ + w = rol(w, 30); +#define R4(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ + w = rol(w, 30); + +static void mg_sha1_transform(uint32_t state[5], + const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a, b, c, d, e, 0); + R0(e, a, b, c, d, 1); + R0(d, e, a, b, c, 2); + R0(c, d, e, a, b, 3); + R0(b, c, d, e, a, 4); + R0(a, b, c, d, e, 5); + R0(e, a, b, c, d, 6); + R0(d, e, a, b, c, 7); + R0(c, d, e, a, b, 8); + R0(b, c, d, e, a, 9); + R0(a, b, c, d, e, 10); + R0(e, a, b, c, d, 11); + R0(d, e, a, b, c, 12); + R0(c, d, e, a, b, 13); + R0(b, c, d, e, a, 14); + R0(a, b, c, d, e, 15); + R1(e, a, b, c, d, 16); + R1(d, e, a, b, c, 17); + R1(c, d, e, a, b, 18); + R1(b, c, d, e, a, 19); + R2(a, b, c, d, e, 20); + R2(e, a, b, c, d, 21); + R2(d, e, a, b, c, 22); + R2(c, d, e, a, b, 23); + R2(b, c, d, e, a, 24); + R2(a, b, c, d, e, 25); + R2(e, a, b, c, d, 26); + R2(d, e, a, b, c, 27); + R2(c, d, e, a, b, 28); + R2(b, c, d, e, a, 29); + R2(a, b, c, d, e, 30); + R2(e, a, b, c, d, 31); + R2(d, e, a, b, c, 32); + R2(c, d, e, a, b, 33); + R2(b, c, d, e, a, 34); + R2(a, b, c, d, e, 35); + R2(e, a, b, c, d, 36); + R2(d, e, a, b, c, 37); + R2(c, d, e, a, b, 38); + R2(b, c, d, e, a, 39); + R3(a, b, c, d, e, 40); + R3(e, a, b, c, d, 41); + R3(d, e, a, b, c, 42); + R3(c, d, e, a, b, 43); + R3(b, c, d, e, a, 44); + R3(a, b, c, d, e, 45); + R3(e, a, b, c, d, 46); + R3(d, e, a, b, c, 47); + R3(c, d, e, a, b, 48); + R3(b, c, d, e, a, 49); + R3(a, b, c, d, e, 50); + R3(e, a, b, c, d, 51); + R3(d, e, a, b, c, 52); + R3(c, d, e, a, b, 53); + R3(b, c, d, e, a, 54); + R3(a, b, c, d, e, 55); + R3(e, a, b, c, d, 56); + R3(d, e, a, b, c, 57); + R3(c, d, e, a, b, 58); + R3(b, c, d, e, a, 59); + R4(a, b, c, d, e, 60); + R4(e, a, b, c, d, 61); + R4(d, e, a, b, c, 62); + R4(c, d, e, a, b, 63); + R4(b, c, d, e, a, 64); + R4(a, b, c, d, e, 65); + R4(e, a, b, c, d, 66); + R4(d, e, a, b, c, 67); + R4(c, d, e, a, b, 68); + R4(b, c, d, e, a, 69); + R4(a, b, c, d, e, 70); + R4(e, a, b, c, d, 71); + R4(d, e, a, b, c, 72); + R4(c, d, e, a, b, 73); + R4(b, c, d, e, a, 74); + R4(a, b, c, d, e, 75); + R4(e, a, b, c, d, 76); + R4(d, e, a, b, c, 77); + R4(c, d, e, a, b, 78); + R4(b, c, d, e, a, 79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + /* Erase working structures. The order of operations is important, + * used to ensure that compiler doesn't optimize those out. */ + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; + (void) b; + (void) c; + (void) d; + (void) e; +} + +void mg_sha1_init(mg_sha1_ctx *context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; +} + +void mg_sha1_update(mg_sha1_ctx *context, const unsigned char *data, + size_t len) { + size_t i, j; + + j = context->count[0]; + if ((context->count[0] += (uint32_t) len << 3) < j) context->count[1]++; + context->count[1] += (uint32_t) (len >> 29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64 - j)); + mg_sha1_transform(context->state, context->buffer); + for (; i + 63 < len; i += 64) { + mg_sha1_transform(context->state, &data[i]); + } + j = 0; + } else + i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} + +void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> + ((3 - (i & 3)) * 8)) & + 255); + } + c = 0200; + mg_sha1_update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + mg_sha1_update(context, &c, 1); + } + mg_sha1_update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = + (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sntp.c" +#endif + + + + + + +#define SNTP_TIME_OFFSET 2208988800U // (1970 - 1900) in seconds +#define SNTP_MAX_FRAC 4294967295.0 // 2 ** 32 - 1 + +static int64_t gettimestamp(const uint32_t *data) { + uint32_t sec = mg_ntohl(data[0]), frac = mg_ntohl(data[1]); + if (sec) sec -= SNTP_TIME_OFFSET; + return ((int64_t) sec) * 1000 + (int64_t) (frac / SNTP_MAX_FRAC * 1000.0); +} + +int64_t mg_sntp_parse(const unsigned char *buf, size_t len) { + int64_t res = -1; + int mode = len > 0 ? buf[0] & 7 : 0; + int version = len > 0 ? (buf[0] >> 3) & 7 : 0; + if (len < 48) { + MG_ERROR(("%s", "corrupt packet")); + } else if (mode != 4 && mode != 5) { + MG_ERROR(("%s", "not a server reply")); + } else if (buf[1] == 0) { + MG_ERROR(("%s", "server sent a kiss of death")); + } else if (version == 4 || version == 3) { + // int64_t ref = gettimestamp((uint32_t *) &buf[16]); + int64_t t0 = gettimestamp((uint32_t *) &buf[24]); + int64_t t1 = gettimestamp((uint32_t *) &buf[32]); + int64_t t2 = gettimestamp((uint32_t *) &buf[40]); + int64_t t3 = (int64_t) mg_millis(); + int64_t delta = (t3 - t0) - (t2 - t1); + MG_VERBOSE(("%lld %lld %lld %lld delta:%lld", t0, t1, t2, t3, delta)); + res = t2 + delta / 2; + } else { + MG_ERROR(("unexpected version: %d", version)); + } + return res; +} + +static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ) { + int64_t milliseconds = mg_sntp_parse(c->recv.buf, c->recv.len); + if (milliseconds > 0) { + MG_INFO(("%lu got time: %lld ms from epoch", c->id, milliseconds)); + mg_call(c, MG_EV_SNTP_TIME, (uint64_t *) &milliseconds); + MG_VERBOSE(("%u.%u", (unsigned) (milliseconds / 1000), + (unsigned) (milliseconds % 1000))); + } + mg_iobuf_del(&c->recv, 0, c->recv.len); // Free receive buffer + } else if (ev == MG_EV_CONNECT) { + mg_sntp_request(c); + } else if (ev == MG_EV_CLOSE) { + } + (void) fnd; + (void) evd; +} + +void mg_sntp_request(struct mg_connection *c) { + if (c->is_resolving) { + MG_ERROR(("%lu wait until resolved", c->id)); + } else { + int64_t now = (int64_t) mg_millis(); // Use int64_t, for vc98 + uint8_t buf[48] = {0}; + uint32_t *t = (uint32_t *) &buf[40]; + double frac = ((double) (now % 1000)) / 1000.0 * SNTP_MAX_FRAC; + buf[0] = (0 << 6) | (4 << 3) | 3; + t[0] = mg_htonl((uint32_t) (now / 1000) + SNTP_TIME_OFFSET); + t[1] = mg_htonl((uint32_t) frac); + mg_send(c, buf, sizeof(buf)); + } +} + +struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fnd) { + struct mg_connection *c = NULL; + if (url == NULL) url = "udp://time.google.com:123"; + if ((c = mg_connect(mgr, url, fn, fnd)) != NULL) c->pfn = sntp_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sock.c" +#endif + + + + + + + + + + +#if MG_ENABLE_SOCKET +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK +typedef unsigned long nfds_t; +#define MG_SOCK_ERRNO WSAGetLastError() +#if defined(_MSC_VER) +#pragma comment(lib, "ws2_32.lib") +#define alloca(a) _alloca(a) +#endif +#define poll(a, b, c) WSAPoll((a), (b), (c)) +#ifndef SO_EXCLUSIVEADDRUSE +#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR)) +#endif +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP +#define MG_SOCK_ERRNO errno +typedef Socket_t SOCKET; +#define INVALID_SOCKET FREERTOS_INVALID_SOCKET +#elif MG_ARCH == MG_ARCH_TIRTOS +#define MG_SOCK_ERRNO errno +#define closesocket(x) close(x) +#else +#define MG_SOCK_ERRNO errno +#ifndef closesocket +#define closesocket(x) close(x) +#endif +#define INVALID_SOCKET (-1) +typedef int SOCKET; +#endif + +#define FD(c_) ((SOCKET) (size_t) (c_)->fd) +#define S2PTR(s_) ((void *) (size_t) (s_)) + +#ifndef MSG_NONBLOCKING +#define MSG_NONBLOCKING 0 +#endif + +#ifndef AF_INET6 +#define AF_INET6 10 +#endif + +union usa { + struct sockaddr sa; + struct sockaddr_in sin; +#if MG_ENABLE_IPV6 + struct sockaddr_in6 sin6; +#endif +}; + +static socklen_t tousa(struct mg_addr *a, union usa *usa) { + socklen_t len = sizeof(usa->sin); + memset(usa, 0, sizeof(*usa)); + usa->sin.sin_family = AF_INET; + usa->sin.sin_port = a->port; + *(uint32_t *) &usa->sin.sin_addr = a->ip; +#if MG_ENABLE_IPV6 + if (a->is_ip6) { + usa->sin.sin_family = AF_INET6; + usa->sin6.sin6_port = a->port; + memcpy(&usa->sin6.sin6_addr, a->ip6, sizeof(a->ip6)); + len = sizeof(usa->sin6); + } +#endif + return len; +} + +static void tomgaddr(union usa *usa, struct mg_addr *a, bool is_ip6) { + a->is_ip6 = is_ip6; + a->port = usa->sin.sin_port; + memcpy(&a->ip, &usa->sin.sin_addr, sizeof(a->ip)); +#if MG_ENABLE_IPV6 + if (is_ip6) { + memcpy(a->ip6, &usa->sin6.sin6_addr, sizeof(a->ip6)); + a->port = usa->sin6.sin6_port; + } +#endif +} + +static bool mg_sock_would_block(void) { + int err = MG_SOCK_ERRNO; + return err == EINPROGRESS || err == EWOULDBLOCK +#ifndef WINCE + || err == EAGAIN || err == EINTR +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + || err == WSAEINTR || err == WSAEWOULDBLOCK +#endif + ; +} + +static bool mg_sock_conn_reset(void) { + int err = MG_SOCK_ERRNO; +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + return err == WSAECONNRESET; +#else + return err == EPIPE || err == ECONNRESET; +#endif +} + +static void setlocaddr(SOCKET fd, struct mg_addr *addr) { + union usa usa; + socklen_t n = sizeof(usa); + if (getsockname(fd, &usa.sa, &n) == 0) { + tomgaddr(&usa, addr, n != sizeof(usa.sin)); + } +} + +static void iolog(struct mg_connection *c, char *buf, long n, bool r) { + if (n == MG_IO_WAIT) { + // Do nothing + } else if (n <= 0) { + c->is_closing = 1; // Termination. Don't call mg_error(): #1529 + } else if (n > 0) { + if (c->is_hexdumping) { + union usa usa; + char t1[50], t2[50]; + socklen_t slen = sizeof(usa.sin); + struct mg_addr a; + memset(&usa, 0, sizeof(usa)); + memset(&a, 0, sizeof(a)); + if (getsockname(FD(c), &usa.sa, &slen) < 0) (void) 0; // Ignore result + tomgaddr(&usa, &a, c->rem.is_ip6); + MG_INFO(("\n-- %lu %s %s %s %s %ld", c->id, + mg_straddr(&a, t1, sizeof(t1)), r ? "<-" : "->", + mg_straddr(&c->rem, t2, sizeof(t2)), c->label, n)); + + mg_hexdump(buf, (size_t) n); + } + if (r) { + c->recv.len += (size_t) n; + mg_call(c, MG_EV_READ, &n); + } else { + mg_iobuf_del(&c->send, 0, (size_t) n); + // if (c->send.len == 0) mg_iobuf_resize(&c->send, 0); + if (c->send.len == 0) { + MG_EPOLL_MOD(c, 0); + } + mg_call(c, MG_EV_WRITE, &n); + } + } +} + +long mg_io_send(struct mg_connection *c, const void *buf, size_t len) { + long n; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen); + if (n > 0) setlocaddr(FD(c), &c->loc); + } else { + n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING); +#if MG_ARCH == MG_ARCH_RTX + if (n == BSD_EWOULDBLOCK) return MG_IO_WAIT; +#endif + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +bool mg_send(struct mg_connection *c, const void *buf, size_t len) { + if (c->is_udp) { + long n = mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p %d:%d %ld err %d", c->id, c->fd, (int) c->send.len, + (int) c->recv.len, n, MG_SOCK_ERRNO)); + iolog(c, (char *) buf, n, false); + return n > 0; + } else { + return mg_iobuf_add(&c->send, c->send.len, buf, len); + } +} + +static void mg_set_non_blocking_mode(SOCKET fd) { +#if defined(MG_CUSTOM_NONBLOCK) + MG_CUSTOM_NONBLOCK(fd); +#elif MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_RTX + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + const BaseType_t off = 0; + if (setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off)) != 0) (void) 0; + if (setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off)) != 0) (void) 0; +#elif MG_ARCH == MG_ARCH_FREERTOS_LWIP || MG_ARCH == MG_ARCH_RTX_LWIP + lwip_fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_AZURERTOS + fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_TIRTOS + int val = 0; + setsockopt(fd, 0, SO_BLOCKING, &val, sizeof(val)); + int status = 0; + int res = SockStatus(fd, FDSTATUS_SEND, &status); + if (res == 0 && status > 0) { + val = status / 2; + int val_size = sizeof(val); + res = SockSet(fd, SOL_SOCKET, SO_SNDLOWAT, &val, val_size); + } +#else + fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); // Non-blocking mode + fcntl(fd, F_SETFD, FD_CLOEXEC); // Set close-on-exec +#endif +} + +bool mg_open_listener(struct mg_connection *c, const char *url) { + SOCKET fd = INVALID_SOCKET; + bool success = false; + c->loc.port = mg_htons(mg_url_port(url)); + if (!mg_aton(mg_url_host(url), &c->loc)) { + MG_ERROR(("invalid listening URL: %s", url)); + } else { + union usa usa; + socklen_t slen = tousa(&c->loc, &usa); + int on = 1, af = c->loc.is_ip6 ? AF_INET6 : AF_INET; + int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM; + int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP; + (void) on; + + if ((fd = socket(af, type, proto)) == INVALID_SOCKET) { + MG_ERROR(("socket: %d", MG_SOCK_ERRNO)); +#if ((MG_ARCH == MG_ARCH_WIN32) || (MG_ARCH == MG_ARCH_UNIX) || \ + (defined(LWIP_SOCKET) && SO_REUSE == 1)) + } else if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, + sizeof(on)) != 0) { + // 1. SO_RESUSEADDR is not enabled on Windows because the semantics of + // SO_REUSEADDR on UNIX and Windows is different. On Windows, + // SO_REUSEADDR allows to bind a socket to a port without error even + // if the port is already open by another program. This is not the + // behavior SO_REUSEADDR was designed for, and leads to hard-to-track + // failure scenarios. Therefore, SO_REUSEADDR was disabled on Windows + // unless SO_EXCLUSIVEADDRUSE is supported and set on a socket. + // 2. In case of LWIP, SO_REUSEADDR should be explicitly enabled, by + // defining + // SO_REUSE (in lwipopts.h), otherwise the code below will compile + // but won't work! (setsockopt will return EINVAL) + MG_ERROR(("reuseaddr: %d", MG_SOCK_ERRNO)); +#endif +#if MG_ARCH == MG_ARCH_WIN32 && !defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE) + } else if (setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *) &on, + sizeof(on)) != 0) { + // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" + MG_ERROR(("exclusiveaddruse: %d", MG_SOCK_ERRNO)); +#endif + } else if (bind(fd, &usa.sa, slen) != 0) { + MG_ERROR(("bind: %d", MG_SOCK_ERRNO)); + } else if ((type == SOCK_STREAM && + listen(fd, MG_SOCK_LISTEN_BACKLOG_SIZE) != 0)) { + // NOTE(lsm): FreeRTOS uses backlog value as a connection limit + // In case port was set to 0, get the real port number + MG_ERROR(("listen: %d", MG_SOCK_ERRNO)); + } else { + setlocaddr(fd, &c->loc); + mg_set_non_blocking_mode(fd); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + success = true; + } + } + if (success == false && fd != INVALID_SOCKET) closesocket(fd); + return success; +} + +long mg_io_recv(struct mg_connection *c, void *buf, size_t len) { + long n = 0; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen); + if (n > 0) tomgaddr(&usa, &c->rem, slen != sizeof(usa.sin)); + } else { + n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING); + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +// NOTE(lsm): do only one iteration of reads, cause some systems +// (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data +static void read_conn(struct mg_connection *c) { + long n = -1; + if (c->recv.len >= MG_MAX_RECV_SIZE) { + mg_error(c, "max_recv_buf_size reached"); + } else if (c->recv.size <= c->recv.len && + !mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE)) { + mg_error(c, "oom"); + } else { + char *buf = (char *) &c->recv.buf[c->recv.len]; + size_t len = c->recv.size - c->recv.len; + n = c->is_tls ? mg_tls_recv(c, buf, len) : mg_io_recv(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, true); + } +} + +static void write_conn(struct mg_connection *c) { + char *buf = (char *) c->send.buf; + size_t len = c->send.len; + long n = c->is_tls ? mg_tls_send(c, buf, len) : mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, false); +} + +static void close_conn(struct mg_connection *c) { + if (FD(c) != INVALID_SOCKET) { +#if MG_ENABLE_EPOLL + epoll_ctl(c->mgr->epoll_fd, EPOLL_CTL_DEL, FD(c), NULL); +#endif + closesocket(FD(c)); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL); +#endif + } + mg_close_conn(c); +} + +static void connect_conn(struct mg_connection *c) { + union usa usa; + socklen_t n = sizeof(usa); + // Use getpeername() to test whether we have connected + if (getpeername(FD(c), &usa.sa, &n) == 0) { + c->is_connecting = 0; + mg_call(c, MG_EV_CONNECT, NULL); + MG_EPOLL_MOD(c, 0); + if (c->is_tls_hs) mg_tls_handshake(c); + } else { + mg_error(c, "socket error"); + } +} + +static void setsockopts(struct mg_connection *c) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_AZURERTOS || \ + MG_ARCH == MG_ARCH_TIRTOS + (void) c; +#else + int on = 1; +#if !defined(SOL_TCP) +#define SOL_TCP IPPROTO_TCP +#endif + if (setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) != 0) + (void) 0; + if (setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) != + 0) + (void) 0; +#endif +} + +void mg_connect_resolved(struct mg_connection *c) { + int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM; + int rc, af = c->rem.is_ip6 ? AF_INET6 : AF_INET; // c->rem has resolved IP + c->fd = S2PTR(socket(af, type, 0)); // Create outbound socket + c->is_resolving = 0; // Clear resolving flag + if (FD(c) == INVALID_SOCKET) { + mg_error(c, "socket(): %d", MG_SOCK_ERRNO); + } else if (c->is_udp) { + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + mg_call(c, MG_EV_CONNECT, NULL); + } else { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + if ((rc = connect(FD(c), &usa.sa, slen)) == 0) { + mg_call(c, MG_EV_CONNECT, NULL); + } else if (mg_sock_would_block()) { + MG_DEBUG(("%lu %p -> %x:%hu pend", c->id, c->fd, mg_ntohl(c->rem.ip), + mg_ntohs(c->rem.port))); + c->is_connecting = 1; + } else { + mg_error(c, "connect: %d", MG_SOCK_ERRNO); + } + } +} + +static SOCKET raccept(SOCKET sock, union usa *usa, socklen_t len) { + SOCKET s = INVALID_SOCKET; + do { + memset(usa, 0, sizeof(*usa)); + s = accept(sock, &usa->sa, &len); + } while (s == INVALID_SOCKET && errno == EINTR); + return s; +} + +static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) { + struct mg_connection *c = NULL; + union usa usa; + socklen_t sa_len = sizeof(usa); + SOCKET fd = raccept(FD(lsn), &usa, sa_len); + if (fd == INVALID_SOCKET) { +#if MG_ARCH == MG_ARCH_AZURERTOS + // AzureRTOS, in non-block socket mode can mark listening socket readable + // even it is not. See comment for 'select' func implementation in + // nx_bsd.c That's not an error, just should try later + if (MG_SOCK_ERRNO != EAGAIN) +#endif + MG_ERROR(("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO)); +#if (MG_ARCH != MG_ARCH_WIN32) && (MG_ARCH != MG_ARCH_FREERTOS_TCP) && \ + (MG_ARCH != MG_ARCH_TIRTOS) && !(MG_ENABLE_POLL) + } else if ((long) fd >= FD_SETSIZE) { + MG_ERROR(("%ld > %ld", (long) fd, (long) FD_SETSIZE)); + closesocket(fd); +#endif + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("%lu OOM", lsn->id)); + closesocket(fd); + } else { + // char buf[40]; + tomgaddr(&usa, &c->rem, sa_len != sizeof(usa.sin)); + // mg_straddr(&c->rem, buf, sizeof(buf)); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + c->is_accepted = 1; + c->is_hexdumping = lsn->is_hexdumping; + c->loc = lsn->loc; + c->pfn = lsn->pfn; + c->pfn_data = lsn->pfn_data; + c->fn = lsn->fn; + c->fn_data = lsn->fn_data; + MG_DEBUG(("%lu %p accepted %x.%hu -> %x.%hu", c->id, c->fd, + mg_ntohl(c->rem.ip), mg_ntohs(c->rem.port), mg_ntohl(c->loc.ip), + mg_ntohs(c->loc.port))); + mg_call(c, MG_EV_OPEN, NULL); + mg_call(c, MG_EV_ACCEPT, NULL); + } +} + +static bool mg_socketpair(SOCKET sp[2], union usa usa[2], bool udp) { + SOCKET sock; + socklen_t n = sizeof(usa[0].sin); + bool success = false; + + sock = sp[0] = sp[1] = INVALID_SOCKET; + (void) memset(&usa[0], 0, sizeof(usa[0])); + usa[0].sin.sin_family = AF_INET; + *(uint32_t *) &usa->sin.sin_addr = mg_htonl(0x7f000001U); // 127.0.0.1 + usa[1] = usa[0]; + + if (udp && (sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + (sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + bind(sp[0], &usa[0].sa, n) == 0 && bind(sp[1], &usa[1].sa, n) == 0 && + getsockname(sp[0], &usa[0].sa, &n) == 0 && + getsockname(sp[1], &usa[1].sa, &n) == 0 && + connect(sp[0], &usa[1].sa, n) == 0 && + connect(sp[1], &usa[0].sa, n) == 0) { + success = true; + } else if (!udp && + (sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + bind(sock, &usa[0].sa, n) == 0 && + listen(sock, MG_SOCK_LISTEN_BACKLOG_SIZE) == 0 && + getsockname(sock, &usa[0].sa, &n) == 0 && + (sp[0] = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + connect(sp[0], &usa[0].sa, n) == 0 && + (sp[1] = raccept(sock, &usa[1], n)) != INVALID_SOCKET) { + success = true; + } + if (success) { + mg_set_non_blocking_mode(sp[1]); + } else { + if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); + if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } + if (sock != INVALID_SOCKET) closesocket(sock); + return success; +} + +int mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn, void *fn_data, + bool udp) { + union usa usa[2]; + SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET}; + struct mg_connection *c = NULL; + if (!mg_socketpair(sp, usa, udp)) { + MG_ERROR(("Cannot create socket pair")); + } else if ((c = mg_wrapfd(mgr, (int) sp[1], fn, fn_data)) == NULL) { + closesocket(sp[0]); + closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } else { + tomgaddr(&usa[0], &c->rem, false); + MG_DEBUG(("%lu %p pipe %lu", c->id, c->fd, (unsigned long) sp[0])); + } + return (int) sp[0]; +} + +static bool can_read(const struct mg_connection *c) { + return c->is_full == false; +} + +static bool can_write(const struct mg_connection *c) { + return c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0); +} + +static bool skip_iotest(const struct mg_connection *c) { + return (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) || + (can_read(c) == false && can_write(c) == false); +} + +static void mg_iotest(struct mg_mgr *mgr, int ms) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + struct mg_connection *c; + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + if (can_read(c)) + FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_READ | eSELECT_EXCEPT); + if (can_write(c)) FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_WRITE); + } + FreeRTOS_select(mgr->ss, pdMS_TO_TICKS(ms)); + for (c = mgr->conns; c != NULL; c = c->next) { + EventBits_t bits = FreeRTOS_FD_ISSET(c->fd, mgr->ss); + c->is_readable = bits & (eSELECT_READ | eSELECT_EXCEPT) ? 1 : 0; + c->is_writable = bits & eSELECT_WRITE ? 1 : 0; + FreeRTOS_FD_CLR(c->fd, mgr->ss, + eSELECT_READ | eSELECT_EXCEPT | eSELECT_WRITE); + } +#elif MG_ENABLE_EPOLL + size_t max = 1; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (mg_tls_pending(c) > 0) ms = 1, c->is_readable = 1; + if (can_write(c)) MG_EPOLL_MOD(c, 1); + max++; + } + struct epoll_event *evs = (struct epoll_event *) alloca(max * sizeof(evs[0])); + int n = epoll_wait(mgr->epoll_fd, evs, (int) max, ms); + for (int i = 0; i < n; i++) { + struct mg_connection *c = (struct mg_connection *) evs[i].data.ptr; + if (evs[i].events & EPOLLERR) { + mg_error(c, "socket error"); + } else if (c->is_readable == 0) { + bool rd = evs[i].events & (EPOLLIN | EPOLLHUP); + bool wr = evs[i].events & EPOLLOUT; + c->is_readable = can_read(c) && rd ? 1U : 0; + c->is_writable = can_write(c) && wr ? 1U : 0; + } + } + (void) skip_iotest; +#elif MG_ENABLE_POLL + nfds_t n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) n++; + struct pollfd *fds = (struct pollfd *) alloca(n * sizeof(fds[0])); + memset(fds, 0, n * sizeof(fds[0])); + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + ms = 1; // Don't wait if TLS is ready + } else { + fds[n].fd = FD(c); + if (can_read(c)) fds[n].events |= POLLIN; + if (can_write(c)) fds[n].events |= POLLOUT; + n++; + } + } + + // MG_INFO(("poll n=%d ms=%d", (int) n, ms)); + if (poll(fds, n, ms) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (n == 0) Sleep(ms); // On Windows, poll fails if no sockets +#endif + memset(fds, 0, n * sizeof(fds[0])); + } + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + c->is_readable = 1; + } else { + if (fds[n].revents & POLLERR) { + mg_error(c, "socket error"); + } else { + c->is_readable = + (unsigned) (fds[n].revents & (POLLIN | POLLHUP) ? 1 : 0); + c->is_writable = (unsigned) (fds[n].revents & POLLOUT ? 1 : 0); + } + n++; + } + } +#else + struct timeval tv = {ms / 1000, (ms % 1000) * 1000}, tv_zero = {0, 0}; + struct mg_connection *c; + fd_set rset, wset, eset; + SOCKET maxfd = 0; + int rc; + + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + FD_SET(FD(c), &eset); + if (can_read(c)) FD_SET(FD(c), &rset); + if (can_write(c)) FD_SET(FD(c), &wset); + if (mg_tls_pending(c) > 0) tv = tv_zero; + if (FD(c) > maxfd) maxfd = FD(c); + } + + if ((rc = select((int) maxfd + 1, &rset, &wset, &eset, &tv)) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (maxfd == 0) Sleep(ms); // On Windows, select fails if no sockets +#else + MG_ERROR(("select: %d %d", rc, MG_SOCK_ERRNO)); +#endif + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + } + + for (c = mgr->conns; c != NULL; c = c->next) { + if (FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &eset)) { + mg_error(c, "socket error"); + } else { + c->is_readable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset); + c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset); + if (mg_tls_pending(c) > 0) c->is_readable = 1; + } + } +#endif +} + +void mg_mgr_poll(struct mg_mgr *mgr, int ms) { + struct mg_connection *c, *tmp; + uint64_t now; + + mg_iotest(mgr, ms); + now = mg_millis(); + mg_timer_poll(&mgr->timers, now); + + for (c = mgr->conns; c != NULL; c = tmp) { + bool is_resp = c->is_resp; + tmp = c->next; + mg_call(c, MG_EV_POLL, &now); + if (is_resp && !c->is_resp) { + long n = 0; + mg_call(c, MG_EV_READ, &n); + } + MG_VERBOSE(("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-', + c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't', + c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h', + c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c')); + if (c->is_resolving || c->is_closing) { + // Do nothing + } else if (c->is_listening && c->is_udp == 0) { + if (c->is_readable) accept_conn(mgr, c); + } else if (c->is_connecting) { + if (c->is_readable || c->is_writable) connect_conn(c); + } else if (c->is_tls_hs) { + if ((c->is_readable || c->is_writable)) mg_tls_handshake(c); + } else { + if (c->is_readable) read_conn(c); + if (c->is_writable) write_conn(c); + } + + if (c->is_draining && c->send.len == 0) c->is_closing = 1; + if (c->is_closing) close_conn(c); + } +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/ssi.c" +#endif + + + + +#ifndef MG_MAX_SSI_DEPTH +#define MG_MAX_SSI_DEPTH 5 +#endif + +#ifndef MG_SSI_BUFSIZ +#define MG_SSI_BUFSIZ 1024 +#endif + +#if MG_ENABLE_SSI +static char *mg_ssi(const char *path, const char *root, int depth) { + struct mg_iobuf b = {NULL, 0, 0, MG_IO_SIZE}; + FILE *fp = fopen(path, "rb"); + if (fp != NULL) { + char buf[MG_SSI_BUFSIZ], arg[sizeof(buf)]; + int ch, intag = 0; + size_t len = 0; + buf[0] = arg[0] = '\0'; + while ((ch = fgetc(fp)) != EOF) { + if (intag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') { + buf[len++] = (char) (ch & 0xff); + buf[len] = '\0'; + if (sscanf(buf, " [%s]", to)); + } + if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term + return i; +} + +static size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, + char *dst, size_t dstlen) { + return mg_dns_parse_name_depth(s, n, ofs, dst, dstlen, 0, 0); +} + +size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs, + bool is_question, struct mg_dns_rr *rr) { + const uint8_t *s = buf + ofs, *e = &buf[len]; + + memset(rr, 0, sizeof(*rr)); + if (len < sizeof(struct mg_dns_header)) return 0; // Too small + if (len > 512) return 0; // Too large, we don't expect that + if (s >= e) return 0; // Overflow + + if ((rr->nlen = (uint16_t) mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0) + return 0; + s += rr->nlen + 4; + if (s > e) return 0; + rr->atype = (uint16_t) (((uint16_t) s[-4] << 8) | s[-3]); + rr->aclass = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (is_question) return (size_t) (rr->nlen + 4); + + s += 6; + if (s > e) return 0; + rr->alen = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (s + rr->alen > e) return 0; + return (size_t) (rr->nlen + rr->alen + 10); +} + +bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) { + const struct mg_dns_header *h = (struct mg_dns_header *) buf; + struct mg_dns_rr rr; + size_t i, n, ofs = sizeof(*h); + memset(dm, 0, sizeof(*dm)); + + if (len < sizeof(*h)) return 0; // Too small, headers dont fit + if (mg_ntohs(h->num_questions) > 1) return 0; // Sanity + if (mg_ntohs(h->num_answers) > 10) return 0; // Sanity + dm->txnid = mg_ntohs(h->txnid); + + for (i = 0; i < mg_ntohs(h->num_questions); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, true, &rr)) == 0) return false; + // MG_INFO(("Q %lu %lu %hu/%hu", ofs, n, rr.atype, rr.aclass)); + ofs += n; + } + for (i = 0; i < mg_ntohs(h->num_answers); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false; + // MG_INFO(("A -- %lu %lu %hu/%hu %s", ofs, n, rr.atype, rr.aclass, + // dm->name)); + mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name)); + ofs += n; + + if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) { + dm->addr.is_ip6 = false; + memcpy(&dm->addr.ip, &buf[ofs - 4], 4); + dm->resolved = true; + break; // Return success + } else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) { + dm->addr.is_ip6 = true; + memcpy(&dm->addr.ip6, &buf[ofs - 16], 16); + dm->resolved = true; + break; // Return success + } + } + return true; +} + +static void dns_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + struct dns_data *d, *tmp; + if (ev == MG_EV_POLL) { + uint64_t now = *(uint64_t *) ev_data; + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_DEBUG ("%lu %lu dns poll", d->expire, now)); + if (now > d->expire) mg_error(d->c, "DNS timeout"); + } + } else if (ev == MG_EV_READ) { + struct mg_dns_message dm; + int resolved = 0; + if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) { + MG_ERROR(("Unexpected DNS response:")); + mg_hexdump(c->recv.buf, c->recv.len); + } else { + // MG_VERBOSE(("%s %d", dm.name, dm.resolved)); + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_INFO(("d %p %hu %hu", d, d->txnid, dm.txnid)); + if (dm.txnid != d->txnid) continue; + if (d->c->is_resolving) { + if (dm.resolved) { + char buf[100]; + dm.addr.port = d->c->rem.port; // Save port + d->c->rem = dm.addr; // Copy resolved address + MG_DEBUG(("%lu %s is %s", d->c->id, dm.name, + mg_ntoa(&d->c->rem, buf, sizeof(buf)))); + mg_connect_resolved(d->c); +#if MG_ENABLE_IPV6 + } else if (dm.addr.is_ip6 == false && dm.name[0] != '\0' && + c->mgr->use_dns6 == false) { + struct mg_str x = mg_str(dm.name); + mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true); +#endif + } else { + mg_error(d->c, "%s DNS lookup failed", dm.name); + } + } else { + MG_ERROR(("%lu already resolved", d->c->id)); + } + mg_dns_free(c, d); + resolved = 1; + } + } + if (!resolved) MG_ERROR(("stray DNS reply")); + c->recv.len = 0; + } else if (ev == MG_EV_CLOSE) { + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + mg_error(d->c, "DNS error"); + mg_dns_free(c, d); + } + } + (void) fn_data; +} + +static bool mg_dns_send(struct mg_connection *c, const struct mg_str *name, + uint16_t txnid, bool ipv6) { + struct { + struct mg_dns_header header; + uint8_t data[256]; + } pkt; + size_t i, n; + memset(&pkt, 0, sizeof(pkt)); + pkt.header.txnid = mg_htons(txnid); + pkt.header.flags = mg_htons(0x100); + pkt.header.num_questions = mg_htons(1); + for (i = n = 0; i < sizeof(pkt.data) - 5; i++) { + if (name->ptr[i] == '.' || i >= name->len) { + pkt.data[n] = (uint8_t) (i - n); + memcpy(&pkt.data[n + 1], name->ptr + n, i - n); + n = i + 1; + } + if (i >= name->len) break; + } + memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5); // A query + n += 5; + if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query + // memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query + // n += 6; + return mg_send(c, &pkt, sizeof(pkt.header) + n); +} + +static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms, + struct mg_dns *dnsc, bool ipv6) { + struct dns_data *d = NULL; + if (dnsc->url == NULL) { + mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()"); + } else if (dnsc->c == NULL) { + dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL); + if (dnsc->c != NULL) { + dnsc->c->pfn = dns_cb; + // dnsc->c->is_hexdumping = 1; + } + } + if (dnsc->c == NULL) { + mg_error(c, "resolver"); + } else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) { + mg_error(c, "resolve OOM"); + } else { + struct dns_data *reqs = (struct dns_data *) c->mgr->active_dns_requests; + char buf[100]; + d->txnid = reqs ? (uint16_t) (reqs->txnid + 1) : 1; + d->next = (struct dns_data *) c->mgr->active_dns_requests; + c->mgr->active_dns_requests = d; + d->expire = mg_millis() + (uint64_t) ms; + d->c = c; + c->is_resolving = 1; + MG_VERBOSE(("%lu resolving %.*s @ %s, txnid %hu", c->id, (int) name->len, + name->ptr, mg_ntoa(&dnsc->c->rem, buf, sizeof(buf)), d->txnid)); + if (!mg_dns_send(dnsc->c, name, d->txnid, ipv6)) { + mg_error(dnsc->c, "DNS send"); + } + } +} + +void mg_resolve(struct mg_connection *c, const char *url) { + struct mg_str host = mg_url_host(url); + c->rem.port = mg_htons(mg_url_port(url)); + if (mg_aton(host, &c->rem)) { + // host is an IP address, do not fire name resolution + mg_connect_resolved(c); + } else { + // host is not an IP, send DNS resolution request + struct mg_dns *dns = c->mgr->use_dns6 ? &c->mgr->dns6 : &c->mgr->dns4; + mg_sendnsreq(c, &host, c->mgr->dnstimeout, dns, c->mgr->use_dns6); + } +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/event.c" +#endif + + + + + +void mg_call(struct mg_connection *c, int ev, void *ev_data) { + // Run user-defined handler first, in order to give it an ability + // to intercept processing (e.g. clean input buffer) before the + // protocol handler kicks in + if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data); + if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data); +} + +void mg_error(struct mg_connection *c, const char *fmt, ...) { + char buf[64]; + va_list ap; + va_start(ap, fmt); + mg_vsnprintf(buf, sizeof(buf), fmt, &ap); + va_end(ap); + MG_ERROR(("%lu %p %s", c->id, c->fd, buf)); + c->is_closing = 1; // Set is_closing before sending MG_EV_CALL + mg_call(c, MG_EV_ERROR, buf); // Let user handler to override it +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fmt.c" +#endif + + + +static void mg_pfn_iobuf_private(char ch, void *param, bool expand) { + struct mg_iobuf *io = (struct mg_iobuf *) param; + if (expand && io->len + 2 > io->size) mg_iobuf_resize(io, io->len + 2); + if (io->len + 2 <= io->size) { + io->buf[io->len++] = (uint8_t) ch; + io->buf[io->len] = 0; + } else if (io->len < io->size) { + io->buf[io->len++] = 0; // Guarantee to 0-terminate + } +} + +static void mg_putchar_iobuf_static(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, false); +} + +void mg_pfn_iobuf(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, true); +} + +size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap) { + struct mg_iobuf io = {(uint8_t *) buf, len, 0, 0}; + size_t n = mg_vxprintf(mg_putchar_iobuf_static, &io, fmt, ap); + if (n < len) buf[n] = '\0'; + return n; +} + +size_t mg_snprintf(char *buf, size_t len, const char *fmt, ...) { + va_list ap; + size_t n; + va_start(ap, fmt); + n = mg_vsnprintf(buf, len, fmt, &ap); + va_end(ap); + return n; +} + +char *mg_vmprintf(const char *fmt, va_list *ap) { + struct mg_iobuf io = {0, 0, 0, 256}; + mg_vxprintf(mg_pfn_iobuf, &io, fmt, ap); + return (char *) io.buf; +} + +char *mg_mprintf(const char *fmt, ...) { + char *s; + va_list ap; + va_start(ap, fmt); + s = mg_vmprintf(fmt, &ap); + va_end(ap); + return s; +} + +size_t mg_xprintf(void (*out)(char, void *), void *ptr, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vxprintf(out, ptr, fmt, &ap); + va_end(ap); + return len; +} + +static bool is_digit(int c) { + return c >= '0' && c <= '9'; +} + +static int addexp(char *buf, int e, int sign) { + int n = 0; + buf[n++] = 'e'; + buf[n++] = (char) sign; + if (e > 400) return 0; + if (e < 10) buf[n++] = '0'; + if (e >= 100) buf[n++] = (char) (e / 100 + '0'), e -= 100 * (e / 100); + if (e >= 10) buf[n++] = (char) (e / 10 + '0'), e -= 10 * (e / 10); + buf[n++] = (char) (e + '0'); + return n; +} + +static int xisinf(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) == 0x7ff00000 && + ((unsigned) ieee754.u == 0); +} + +static int xisnan(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) + + ((unsigned) ieee754.u != 0) > + 0x7ff00000; +} + +static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width) { + char buf[40]; + int i, s = 0, n = 0, e = 0; + double t, mul, saved; + if (d == 0.0) return mg_snprintf(dst, dstlen, "%s", "0"); + if (xisinf(d)) return mg_snprintf(dst, dstlen, "%s", d > 0 ? "inf" : "-inf"); + if (xisnan(d)) return mg_snprintf(dst, dstlen, "%s", "nan"); + if (d < 0.0) d = -d, buf[s++] = '-'; + + // Round + saved = d; + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0; + while (d <= 1.0 && d / mul <= 1.0) mul /= 10.0; + for (i = 0, t = mul * 5; i < width; i++) t /= 10.0; + d += t; + // Calculate exponent, and 'mul' for scientific representation + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0, e++; + while (d < 1.0 && d / mul < 1.0) mul /= 10.0, e--; + // printf(" --> %g %d %g %g\n", saved, e, t, mul); + + if (e >= width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / t, e, n, buf); + n += addexp(buf + s + n, e, '+'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else if (e <= -width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / mul, e, n, buf); + n += addexp(buf + s + n, -e, '-'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else { + for (i = 0, t = mul; t >= 1.0 && s + n < (int) sizeof(buf); i++) { + int ch = (int) (d / t); + if (n > 0 || ch > 0) buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + // printf(" --> [%g] -> %g %g (%d) [%.*s]\n", saved, d, t, n, s + n, buf); + if (n == 0) buf[s++] = '0'; + while (t >= 1.0 && n + s < (int) sizeof(buf)) buf[n++] = '0', t /= 10.0; + if (s + n < (int) sizeof(buf)) buf[n + s++] = '.'; + // printf(" 1--> [%g] -> [%.*s]\n", saved, s + n, buf); + for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && n < width; i++) { + int ch = (int) (d / t); + buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + } + while (n > 0 && buf[s + n - 1] == '0') n--; // Trim trailing zeros + if (n > 0 && buf[s + n - 1] == '.') n--; // Trim trailing dot + n += s; + if (n >= (int) sizeof(buf)) n = (int) sizeof(buf) - 1; + buf[n] = '\0'; + return mg_snprintf(dst, dstlen, "%s", buf); +} + +static size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex) { + const char *letters = "0123456789abcdef"; + uint64_t v = (uint64_t) val; + size_t s = 0, n, i; + if (is_signed && val < 0) buf[s++] = '-', v = (uint64_t) (-val); + // This loop prints a number in reverse order. I guess this is because we + // write numbers from right to left: least significant digit comes last. + // Maybe because we use Arabic numbers, and Arabs write RTL? + if (is_hex) { + for (n = 0; v; v >>= 4) buf[s + n++] = letters[v & 15]; + } else { + for (n = 0; v; v /= 10) buf[s + n++] = letters[v % 10]; + } + // Reverse a string + for (i = 0; i < n / 2; i++) { + char t = buf[s + i]; + buf[s + i] = buf[s + n - i - 1], buf[s + n - i - 1] = t; + } + if (val == 0) buf[n++] = '0'; // Handle special case + return n + s; +} + +static size_t scpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0; + while (i < len && buf[i] != '\0') out(buf[i++], ptr); + return i; +} + +static char mg_esc(int c, bool esc) { + const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\""; + for (p = esc ? esc1 : esc2; *p != '\0'; p++) { + if (*p == c) return esc ? esc2[p - esc1] : esc1[p - esc2]; + } + return 0; +} + +static char mg_escape(int c) { + return mg_esc(c, true); +} + +static size_t qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0, extra = 0; + for (i = 0; i < len && buf[i] != '\0'; i++) { + char c = mg_escape(buf[i]); + if (c) { + out('\\', ptr), out(c, ptr), extra++; + } else { + out(buf[i], ptr); + } + } + return i + extra; +} + +static size_t Qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t n = 2; + out('"', ptr); + n += qcpy(out, ptr, buf, len); + out('"', ptr); + return n; +} + +static size_t bcpy(void (*out)(char, void *), void *ptr, uint8_t *buf, + size_t len) { + size_t i, n = 0; + const char *t = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + out('"', ptr), n++; + for (i = 0; i < len; i += 3) { + uint8_t c1 = buf[i], c2 = i + 1 < len ? buf[i + 1] : 0, + c3 = i + 2 < len ? buf[i + 2] : 0; + char tmp[4] = {t[c1 >> 2], t[(c1 & 3) << 4 | (c2 >> 4)], '=', '='}; + if (i + 1 < len) tmp[2] = t[(c2 & 15) << 2 | (c3 >> 6)]; + if (i + 2 < len) tmp[3] = t[c3 & 63]; + n += scpy(out, ptr, tmp, sizeof(tmp)); + } + out('"', ptr), n++; + return n; +} + +size_t mg_vxprintf(void (*out)(char, void *), void *param, const char *fmt, + va_list *ap) { + size_t i = 0, n = 0; + while (fmt[i] != '\0') { + if (fmt[i] == '%') { + size_t j, k, x = 0, is_long = 0, w = 0 /* width */, pr = ~0U /* prec */; + char pad = ' ', minus = 0, c = fmt[++i]; + if (c == '#') x++, c = fmt[++i]; + if (c == '-') minus++, c = fmt[++i]; + if (c == '0') pad = '0', c = fmt[++i]; + while (is_digit(c)) w *= 10, w += (size_t) (c - '0'), c = fmt[++i]; + if (c == '.') { + c = fmt[++i]; + if (c == '*') { + pr = (size_t) va_arg(*ap, int); + c = fmt[++i]; + } else { + pr = 0; + while (is_digit(c)) pr *= 10, pr += (size_t) (c - '0'), c = fmt[++i]; + } + } + while (c == 'h') c = fmt[++i]; // Treat h and hh as int + if (c == 'l') { + is_long++, c = fmt[++i]; + if (c == 'l') is_long++, c = fmt[++i]; + } + if (c == 'p') x = 1, is_long = 1; + if (c == 'd' || c == 'u' || c == 'x' || c == 'X' || c == 'p' || + c == 'g' || c == 'f') { + bool s = (c == 'd'), h = (c == 'x' || c == 'X' || c == 'p'); + char tmp[40]; + size_t xl = x ? 2 : 0; + if (c == 'g' || c == 'f') { + double v = va_arg(*ap, double); + if (pr == ~0U) pr = 6; + k = mg_dtoa(tmp, sizeof(tmp), v, (int) pr); + } else if (is_long == 2) { + int64_t v = va_arg(*ap, int64_t); + k = mg_lld(tmp, v, s, h); + } else if (is_long == 1) { + long v = va_arg(*ap, long); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned long) v, s, h); + } else { + int v = va_arg(*ap, int); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned) v, s, h); + } + for (j = 0; j < xl && w > 0; j++) w--; + for (j = 0; pad == ' ' && !minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, (char *) "0x", xl); + for (j = 0; pad == '0' && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, tmp, k); + for (j = 0; pad == ' ' && minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + } else if (c == 'M') { + mg_pm_t f = va_arg(*ap, mg_pm_t); + n += f(out, param, ap); + } else if (c == 'c') { + int ch = va_arg(*ap, int); + out((char) ch, param); + n++; + } else if (c == 'H') { + // Print hex-encoded double-quoted string + size_t bl = (size_t) va_arg(*ap, int); + uint8_t *p = va_arg(*ap, uint8_t *), dquote = '"'; + const char *hex = "0123456789abcdef"; + n += scpy(out, param, (char *) &dquote, 1); + for (j = 0; j < bl; j++) { + n += scpy(out, param, (char *) &hex[(p[j] >> 4) & 15], 1); + n += scpy(out, param, (char *) &hex[p[j] & 15], 1); + } + n += scpy(out, param, (char *) &dquote, 1); + } else if (c == 'V') { + // Print base64-encoded double-quoted string + size_t len = (size_t) va_arg(*ap, int); + uint8_t *buf = va_arg(*ap, uint8_t *); + n += bcpy(out, param, buf, len); + } else if (c == 's' || c == 'Q' || c == 'q') { + char *p = va_arg(*ap, char *); + size_t (*f)(void (*)(char, void *), void *, char *, size_t) = scpy; + if (c == 'Q') f = Qcpy; + if (c == 'q') f = qcpy; + if (pr == ~0U) pr = p == NULL ? 0 : strlen(p); + for (j = 0; !minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + n += f(out, param, p, pr); + for (j = 0; minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + } else if (c == '%') { + out('%', param); + n++; + } else { + out('%', param); + out(c, param); + n += 2; + } + i++; + } else { + out(fmt[i], param), n++, i++; + } + } + return n; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs.c" +#endif + + + +struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags) { + struct mg_fd *fd = (struct mg_fd *) calloc(1, sizeof(*fd)); + if (fd != NULL) { + fd->fd = fs->op(path, flags); + fd->fs = fs; + if (fd->fd == NULL) { + free(fd); + fd = NULL; + } + } + return fd; +} + +void mg_fs_close(struct mg_fd *fd) { + if (fd != NULL) { + fd->fs->cl(fd->fd); + free(fd); + } +} + +char *mg_file_read(struct mg_fs *fs, const char *path, size_t *sizep) { + struct mg_fd *fd; + char *data = NULL; + size_t size = 0; + fs->st(path, &size, NULL); + if ((fd = mg_fs_open(fs, path, MG_FS_READ)) != NULL) { + data = (char *) calloc(1, size + 1); + if (data != NULL) { + if (fs->rd(fd->fd, data, size) != size) { + free(data); + data = NULL; + } else { + data[size] = '\0'; + if (sizep != NULL) *sizep = size; + } + } + mg_fs_close(fd); + } + return data; +} + +bool mg_file_write(struct mg_fs *fs, const char *path, const void *buf, + size_t len) { + bool result = false; + struct mg_fd *fd; + char tmp[MG_PATH_MAX]; + mg_snprintf(tmp, sizeof(tmp), "%s..%d", path, rand()); + if ((fd = mg_fs_open(fs, tmp, MG_FS_WRITE)) != NULL) { + result = fs->wr(fd->fd, buf, len) == len; + mg_fs_close(fd); + if (result) { + fs->rm(path); + fs->mv(tmp, path); + } else { + fs->rm(tmp); + } + } + return result; +} + +bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...) { + va_list ap; + char *data; + bool result = false; + va_start(ap, fmt); + data = mg_vmprintf(fmt, &ap); + va_end(ap); + result = mg_file_write(fs, path, data, strlen(data)); + free(data); + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_fat.c" +#endif + + + +#if MG_ENABLE_FATFS +#include + +static int mg_days_from_epoch(int y, int m, int d) { + y -= m <= 2; + int era = y / 400; + int yoe = y - era * 400; + int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1; + int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy; + return era * 146097 + doe - 719468; +} + +static time_t mg_timegm(const struct tm *t) { + int year = t->tm_year + 1900; + int month = t->tm_mon; // 0-11 + if (month > 11) { + year += month / 12; + month %= 12; + } else if (month < 0) { + int years_diff = (11 - month) / 12; + year -= years_diff; + month += 12 * years_diff; + } + int x = mg_days_from_epoch(year, month + 1, t->tm_mday); + return 60 * (60 * (24L * x + t->tm_hour) + t->tm_min) + t->tm_sec; +} + +static time_t ff_time_to_epoch(uint16_t fdate, uint16_t ftime) { + struct tm tm; + memset(&tm, 0, sizeof(struct tm)); + tm.tm_sec = (ftime << 1) & 0x3e; + tm.tm_min = ((ftime >> 5) & 0x3f); + tm.tm_hour = ((ftime >> 11) & 0x1f); + tm.tm_mday = (fdate & 0x1f); + tm.tm_mon = ((fdate >> 5) & 0x0f) - 1; + tm.tm_year = ((fdate >> 9) & 0x7f) + 80; + return mg_timegm(&tm); +} + +static int ff_stat(const char *path, size_t *size, time_t *mtime) { + FILINFO fi; + if (path[0] == '\0') { + if (size) *size = 0; + if (mtime) *mtime = 0; + return MG_FS_DIR; + } else if (f_stat(path, &fi) == 0) { + if (size) *size = (size_t) fi.fsize; + if (mtime) *mtime = ff_time_to_epoch(fi.fdate, fi.ftime); + return MG_FS_READ | MG_FS_WRITE | ((fi.fattrib & AM_DIR) ? MG_FS_DIR : 0); + } else { + return 0; + } +} + +static void ff_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + DIR d; + FILINFO fi; + if (f_opendir(&d, dir) == FR_OK) { + while (f_readdir(&d, &fi) == FR_OK && fi.fname[0] != '\0') { + if (!strcmp(fi.fname, ".") || !strcmp(fi.fname, "..")) continue; + fn(fi.fname, userdata); + } + f_closedir(&d); + } +} + +static void *ff_open(const char *path, int flags) { + FIL f; + unsigned char mode = FA_READ; + if (flags & MG_FS_WRITE) mode |= FA_WRITE | FA_OPEN_ALWAYS | FA_OPEN_APPEND; + if (f_open(&f, path, mode) == 0) { + FIL *fp = calloc(1, sizeof(*fp)); + memcpy(fp, &f, sizeof(*fp)); + return fp; + } else { + return NULL; + } +} + +static void ff_close(void *fp) { + if (fp != NULL) { + f_close((FIL *) fp); + free(fp); + } +} + +static size_t ff_read(void *fp, void *buf, size_t len) { + UINT n = 0, misalign = ((size_t) buf) & 3; + if (misalign) { + char aligned[4]; + f_read((FIL *) fp, aligned, len > misalign ? misalign : len, &n); + memcpy(buf, aligned, n); + } else { + f_read((FIL *) fp, buf, len, &n); + } + return n; +} + +static size_t ff_write(void *fp, const void *buf, size_t len) { + UINT n = 0; + return f_write((FIL *) fp, (char *) buf, len, &n) == FR_OK ? n : 0; +} + +static size_t ff_seek(void *fp, size_t offset) { + f_lseek((FIL *) fp, offset); + return offset; +} + +static bool ff_rename(const char *from, const char *to) { + return f_rename(from, to) == FR_OK; +} + +static bool ff_remove(const char *path) { + return f_unlink(path) == FR_OK; +} + +static bool ff_mkdir(const char *path) { + return f_mkdir(path) == FR_OK; +} + +struct mg_fs mg_fs_fat = {ff_stat, ff_list, ff_open, ff_close, ff_read, + ff_write, ff_seek, ff_rename, ff_remove, ff_mkdir}; +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_packed.c" +#endif + + + + +struct packed_file { + const char *data; + size_t size; + size_t pos; +}; + +const char *mg_unpack(const char *path, size_t *size, time_t *mtime); +const char *mg_unlist(size_t no); + +#if MG_ENABLE_PACKED_FS +#else +const char *mg_unpack(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return NULL; +} +const char *mg_unlist(size_t no) { + (void) no; + return NULL; +} +#endif + +static int is_dir_prefix(const char *prefix, size_t n, const char *path) { + // MG_INFO(("[%.*s] [%s] %c", (int) n, prefix, path, path[n])); + return n < strlen(path) && strncmp(prefix, path, n) == 0 && + (n == 0 || path[n] == '/' || path[n - 1] == '/'); +} + +static int packed_stat(const char *path, size_t *size, time_t *mtime) { + const char *p; + size_t i, n = strlen(path); + if (mg_unpack(path, size, mtime)) return MG_FS_READ; // Regular file + // Scan all files. If `path` is a dir prefix for any of them, it's a dir + for (i = 0; (p = mg_unlist(i)) != NULL; i++) { + if (is_dir_prefix(path, n, p)) return MG_FS_DIR; + } + return 0; +} + +static void packed_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + char buf[MG_PATH_MAX], tmp[sizeof(buf)]; + const char *path, *begin, *end; + size_t i, n = strlen(dir); + tmp[0] = '\0'; // Previously listed entry + for (i = 0; (path = mg_unlist(i)) != NULL; i++) { + if (!is_dir_prefix(dir, n, path)) continue; + begin = &path[n + 1]; + end = strchr(begin, '/'); + if (end == NULL) end = begin + strlen(begin); + mg_snprintf(buf, sizeof(buf), "%.*s", (int) (end - begin), begin); + buf[sizeof(buf) - 1] = '\0'; + // If this entry has been already listed, skip + // NOTE: we're assuming that file list is sorted alphabetically + if (strcmp(buf, tmp) == 0) continue; + fn(buf, userdata); // Not yet listed, call user function + strcpy(tmp, buf); // And save this entry as listed + } +} + +static void *packed_open(const char *path, int flags) { + size_t size = 0; + const char *data = mg_unpack(path, &size, NULL); + struct packed_file *fp = NULL; + if (data == NULL) return NULL; + if (flags & MG_FS_WRITE) return NULL; + fp = (struct packed_file *) calloc(1, sizeof(*fp)); + fp->size = size; + fp->data = data; + return (void *) fp; +} + +static void packed_close(void *fp) { + if (fp != NULL) free(fp); +} + +static size_t packed_read(void *fd, void *buf, size_t len) { + struct packed_file *fp = (struct packed_file *) fd; + if (fp->pos + len > fp->size) len = fp->size - fp->pos; + memcpy(buf, &fp->data[fp->pos], len); + fp->pos += len; + return len; +} + +static size_t packed_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} + +static size_t packed_seek(void *fd, size_t offset) { + struct packed_file *fp = (struct packed_file *) fd; + fp->pos = offset; + if (fp->pos > fp->size) fp->pos = fp->size; + return fp->pos; +} + +static bool packed_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} + +static bool packed_remove(const char *path) { + (void) path; + return false; +} + +static bool packed_mkdir(const char *path) { + (void) path; + return false; +} + +struct mg_fs mg_fs_packed = { + packed_stat, packed_list, packed_open, packed_close, packed_read, + packed_write, packed_seek, packed_rename, packed_remove, packed_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_posix.c" +#endif + + +#if MG_ENABLE_FILE + +#ifndef MG_STAT_STRUCT +#define MG_STAT_STRUCT stat +#endif + +#ifndef MG_STAT_FUNC +#define MG_STAT_FUNC stat +#endif + +static int p_stat(const char *path, size_t *size, time_t *mtime) { +#if !defined(S_ISDIR) + MG_ERROR(("stat() API is not supported. %p %p %p", path, size, mtime)); + return 0; +#else +#if MG_ARCH == MG_ARCH_WIN32 + struct _stati64 st; + wchar_t tmp[MG_PATH_MAX]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, tmp, sizeof(tmp) / sizeof(tmp[0])); + if (_wstati64(tmp, &st) != 0) return 0; +#else + struct MG_STAT_STRUCT st; + if (MG_STAT_FUNC(path, &st) != 0) return 0; +#endif + if (size) *size = (size_t) st.st_size; + if (mtime) *mtime = st.st_mtime; + return MG_FS_READ | MG_FS_WRITE | (S_ISDIR(st.st_mode) ? MG_FS_DIR : 0); +#endif +} + +#if MG_ARCH == MG_ARCH_WIN32 +struct dirent { + char d_name[MAX_PATH]; +}; + +typedef struct win32_dir { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; + +int gettimeofday(struct timeval *tv, void *tz) { + FILETIME ft; + unsigned __int64 tmpres = 0; + + if (tv != NULL) { + GetSystemTimeAsFileTime(&ft); + tmpres |= ft.dwHighDateTime; + tmpres <<= 32; + tmpres |= ft.dwLowDateTime; + tmpres /= 10; // convert into microseconds + tmpres -= (int64_t) 11644473600000000; + tv->tv_sec = (long) (tmpres / 1000000UL); + tv->tv_usec = (long) (tmpres % 1000000UL); + } + (void) tz; + return 0; +} + +static int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + int ret; + char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p; + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + // Trim trailing slashes. Leave backslash for paths like "X:\" + p = buf + strlen(buf) - 1; + while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + // Convert back to Unicode. If doubly-converted string does not match the + // original, something is fishy, reject. + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + ret = 0; + } + return ret; +} + +DIR *opendir(const char *name) { + DIR *d = NULL; + wchar_t wpath[MAX_PATH]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((d = (DIR *) calloc(1, sizeof(*d))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0])); + attrs = GetFileAttributesW(wpath); + if (attrs != 0Xffffffff && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + d->handle = FindFirstFileW(wpath, &d->info); + d->result.d_name[0] = '\0'; + } else { + free(d); + d = NULL; + } + } + return d; +} + +int closedir(DIR *d) { + int result = 0; + if (d != NULL) { + if (d->handle != INVALID_HANDLE_VALUE) + result = FindClose(d->handle) ? 0 : -1; + free(d); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} + +struct dirent *readdir(DIR *d) { + struct dirent *result = NULL; + if (d != NULL) { + memset(&d->result, 0, sizeof(d->result)); + if (d->handle != INVALID_HANDLE_VALUE) { + result = &d->result; + WideCharToMultiByte(CP_UTF8, 0, d->info.cFileName, -1, result->d_name, + sizeof(result->d_name), NULL, NULL); + if (!FindNextFileW(d->handle, &d->info)) { + FindClose(d->handle); + d->handle = INVALID_HANDLE_VALUE; + } + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} +#endif + +static void p_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { +#if MG_ENABLE_DIRLIST + struct dirent *dp; + DIR *dirp; + if ((dirp = (opendir(dir))) == NULL) return; + while ((dp = readdir(dirp)) != NULL) { + if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; + fn(dp->d_name, userdata); + } + closedir(dirp); +#else + (void) dir, (void) fn, (void) userdata; +#endif +} + +static void *p_open(const char *path, int flags) { + const char *mode = flags == MG_FS_READ ? "rb" : "a+b"; +#if MG_ARCH == MG_ARCH_WIN32 + wchar_t b1[MG_PATH_MAX], b2[10]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, b1, sizeof(b1) / sizeof(b1[0])); + MultiByteToWideChar(CP_UTF8, 0, mode, -1, b2, sizeof(b2) / sizeof(b2[0])); + return (void *) _wfopen(b1, b2); +#else + return (void *) fopen(path, mode); +#endif +} + +static void p_close(void *fp) { + fclose((FILE *) fp); +} + +static size_t p_read(void *fp, void *buf, size_t len) { + return fread(buf, 1, len, (FILE *) fp); +} + +static size_t p_write(void *fp, const void *buf, size_t len) { + return fwrite(buf, 1, len, (FILE *) fp); +} + +static size_t p_seek(void *fp, size_t offset) { +#if (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64) || \ + (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \ + (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600) + if (fseeko((FILE *) fp, (off_t) offset, SEEK_SET) != 0) (void) 0; +#else + if (fseek((FILE *) fp, (long) offset, SEEK_SET) != 0) (void) 0; +#endif + return (size_t) ftell((FILE *) fp); +} + +static bool p_rename(const char *from, const char *to) { + return rename(from, to) == 0; +} + +static bool p_remove(const char *path) { + return remove(path) == 0; +} + +static bool p_mkdir(const char *path) { + return mkdir(path, 0775) == 0; +} + +#else + +static int p_stat(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return 0; +} +static void p_list(const char *path, void (*fn)(const char *, void *), + void *userdata) { + (void) path, (void) fn, (void) userdata; +} +static void *p_open(const char *path, int flags) { + (void) path, (void) flags; + return NULL; +} +static void p_close(void *fp) { + (void) fp; +} +static size_t p_read(void *fd, void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_seek(void *fd, size_t offset) { + (void) fd, (void) offset; + return (size_t) ~0; +} +static bool p_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} +static bool p_remove(const char *path) { + (void) path; + return false; +} +static bool p_mkdir(const char *path) { + (void) path; + return false; +} +#endif + +struct mg_fs mg_fs_posix = {p_stat, p_list, p_open, p_close, p_read, + p_write, p_seek, p_rename, p_remove, p_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/http.c" +#endif + + + + + + + + + + + +// Chunk deletion marker is the MSB in the "processed" counter +#define MG_DMARK ((size_t) 1 << (sizeof(size_t) * 8 - 1)) + +// Multipart POST example: +// --xyz +// Content-Disposition: form-data; name="val" +// +// abcdef +// --xyz +// Content-Disposition: form-data; name="foo"; filename="a.txt" +// Content-Type: text/plain +// +// hello world +// +// --xyz-- +size_t mg_http_next_multipart(struct mg_str body, size_t ofs, + struct mg_http_part *part) { + struct mg_str cd = mg_str_n("Content-Disposition", 19); + const char *s = body.ptr; + size_t b = ofs, h1, h2, b1, b2, max = body.len; + + // Init part params + if (part != NULL) part->name = part->filename = part->body = mg_str_n(0, 0); + + // Skip boundary + while (b + 2 < max && s[b] != '\r' && s[b + 1] != '\n') b++; + if (b <= ofs || b + 2 >= max) return 0; + // MG_INFO(("B: %zu %zu [%.*s]", ofs, b - ofs, (int) (b - ofs), s)); + + // Skip headers + h1 = h2 = b + 2; + for (;;) { + while (h2 + 2 < max && s[h2] != '\r' && s[h2 + 1] != '\n') h2++; + if (h2 == h1) break; + if (h2 + 2 >= max) return 0; + // MG_INFO(("Header: [%.*s]", (int) (h2 - h1), &s[h1])); + if (part != NULL && h1 + cd.len + 2 < h2 && s[h1 + cd.len] == ':' && + mg_ncasecmp(&s[h1], cd.ptr, cd.len) == 0) { + struct mg_str v = mg_str_n(&s[h1 + cd.len + 2], h2 - (h1 + cd.len + 2)); + part->name = mg_http_get_header_var(v, mg_str_n("name", 4)); + part->filename = mg_http_get_header_var(v, mg_str_n("filename", 8)); + } + h1 = h2 = h2 + 2; + } + b1 = b2 = h2 + 2; + while (b2 + 2 + (b - ofs) + 2 < max && !(s[b2] == '\r' && s[b2 + 1] == '\n' && + memcmp(&s[b2 + 2], s, b - ofs) == 0)) + b2++; + + if (b2 + 2 >= max) return 0; + if (part != NULL) part->body = mg_str_n(&s[b1], b2 - b1); + // MG_INFO(("Body: [%.*s]", (int) (b2 - b1), &s[b1])); + return b2 + 2; +} + +void mg_http_bauth(struct mg_connection *c, const char *user, + const char *pass) { + struct mg_str u = mg_str(user), p = mg_str(pass); + size_t need = c->send.len + 36 + (u.len + p.len) * 2; + if (c->send.size < need) mg_iobuf_resize(&c->send, need); + if (c->send.size >= need) { + int i, n = 0; + char *buf = (char *) &c->send.buf[c->send.len + 21]; + memcpy(&buf[-21], "Authorization: Basic ", 21); // DON'T use mg_send! + for (i = 0; i < (int) u.len; i++) { + n = mg_base64_update(((unsigned char *) u.ptr)[i], buf, n); + } + if (p.len > 0) { + n = mg_base64_update(':', buf, n); + for (i = 0; i < (int) p.len; i++) { + n = mg_base64_update(((unsigned char *) p.ptr)[i], buf, n); + } + } + n = mg_base64_final(buf, n); + c->send.len += 21 + (size_t) n + 2; + memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2); + } else { + MG_ERROR(("%lu %s cannot resize iobuf %d->%d ", c->id, c->label, + (int) c->send.size, (int) need)); + } +} + +struct mg_str mg_http_var(struct mg_str buf, struct mg_str name) { + struct mg_str k, v, result = mg_str_n(NULL, 0); + while (mg_split(&buf, &k, &v, '&')) { + if (name.len == k.len && mg_ncasecmp(name.ptr, k.ptr, k.len) == 0) { + result = v; + break; + } + } + return result; +} + +int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst, + size_t dst_len) { + int len; + if (dst == NULL || dst_len == 0) { + len = -2; // Bad destination + } else if (buf->ptr == NULL || name == NULL || buf->len == 0) { + len = -1; // Bad source + dst[0] = '\0'; + } else { + struct mg_str v = mg_http_var(*buf, mg_str(name)); + if (v.ptr == NULL) { + len = -4; // Name does not exist + } else { + len = mg_url_decode(v.ptr, v.len, dst, dst_len, 1); + if (len < 0) len = -3; // Failed to decode + } + } + return len; +} + +static bool isx(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || + (c >= 'A' && c <= 'F'); +} + +int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len, + int is_form_url_encoded) { + size_t i, j; + for (i = j = 0; i < src_len && j + 1 < dst_len; i++, j++) { + if (src[i] == '%') { + // Use `i + 2 < src_len`, not `i < src_len - 2`, note small src_len + if (i + 2 < src_len && isx(src[i + 1]) && isx(src[i + 2])) { + mg_unhex(src + i + 1, 2, (uint8_t *) &dst[j]); + i += 2; + } else { + return -1; + } + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } + if (j < dst_len) dst[j] = '\0'; // Null-terminate the destination + return i >= src_len && j < dst_len ? (int) j : -1; +} + +static bool isok(uint8_t c) { + return c == '\n' || c == '\r' || c >= ' '; +} + +int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) { + size_t i; + for (i = 0; i < buf_len; i++) { + if (!isok(buf[i])) return -1; + if ((i > 0 && buf[i] == '\n' && buf[i - 1] == '\n') || + (i > 3 && buf[i] == '\n' && buf[i - 1] == '\r' && buf[i - 2] == '\n')) + return (int) i + 1; + } + return 0; +} + +static const char *skip(const char *s, const char *e, const char *d, + struct mg_str *v) { + v->ptr = s; + while (s < e && *s != '\n' && strchr(d, *s) == NULL) s++; + v->len = (size_t) (s - v->ptr); + while (s < e && strchr(d, *s) != NULL) s++; + return s; +} + +struct mg_str *mg_http_get_header(struct mg_http_message *h, const char *name) { + size_t i, n = strlen(name), max = sizeof(h->headers) / sizeof(h->headers[0]); + for (i = 0; i < max && h->headers[i].name.len > 0; i++) { + struct mg_str *k = &h->headers[i].name, *v = &h->headers[i].value; + if (n == k->len && mg_ncasecmp(k->ptr, name, n) == 0) return v; + } + return NULL; +} + +static void mg_http_parse_headers(const char *s, const char *end, + struct mg_http_header *h, int max_headers) { + int i; + for (i = 0; i < max_headers; i++) { + struct mg_str k, v, tmp; + const char *he = skip(s, end, "\n", &tmp); + s = skip(s, he, ": \r\n", &k); + s = skip(s, he, "\r\n", &v); + if (k.len == tmp.len) continue; + while (v.len > 0 && v.ptr[v.len - 1] == ' ') v.len--; // Trim spaces + if (k.len == 0) break; + // MG_INFO(("--HH [%.*s] [%.*s] [%.*s]", (int) tmp.len - 1, tmp.ptr, + //(int) k.len, k.ptr, (int) v.len, v.ptr)); + h[i].name = k; + h[i].value = v; + } +} + +int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) { + int is_response, req_len = mg_http_get_request_len((unsigned char *) s, len); + const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL + struct mg_str *cl; + + memset(hm, 0, sizeof(*hm)); + if (req_len <= 0) return req_len; + + hm->message.ptr = hm->head.ptr = s; + hm->body.ptr = end; + hm->head.len = (size_t) req_len; + hm->chunk.ptr = end; + hm->message.len = hm->body.len = (size_t) ~0; // Set body length to infinite + + // Parse request line + s = skip(s, end, " ", &hm->method); + s = skip(s, end, " ", &hm->uri); + s = skip(s, end, "\r\n", &hm->proto); + + // Sanity check. Allow protocol/reason to be empty + if (hm->method.len == 0 || hm->uri.len == 0) return -1; + + // If URI contains '?' character, setup query string + if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) { + hm->query.ptr = qs + 1; + hm->query.len = (size_t) (&hm->uri.ptr[hm->uri.len] - (qs + 1)); + hm->uri.len = (size_t) (qs - hm->uri.ptr); + } + + mg_http_parse_headers(s, end, hm->headers, + sizeof(hm->headers) / sizeof(hm->headers[0])); + if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) { + hm->body.len = (size_t) mg_to64(*cl); + hm->message.len = (size_t) req_len + hm->body.len; + } + + // mg_http_parse() is used to parse both HTTP requests and HTTP + // responses. If HTTP response does not have Content-Length set, then + // body is read until socket is closed, i.e. body.len is infinite (~0). + // + // For HTTP requests though, according to + // http://tools.ietf.org/html/rfc7231#section-8.1.3, + // only POST and PUT methods have defined body semantics. + // Therefore, if Content-Length is not specified and methods are + // not one of PUT or POST, set body length to 0. + // + // So, if it is HTTP request, and Content-Length is not set, + // and method is not (PUT or POST) then reset body length to zero. + is_response = mg_ncasecmp(hm->method.ptr, "HTTP/", 5) == 0; + if (hm->body.len == (size_t) ~0 && !is_response && + mg_vcasecmp(&hm->method, "PUT") != 0 && + mg_vcasecmp(&hm->method, "POST") != 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + // The 204 (No content) responses also have 0 body length + if (hm->body.len == (size_t) ~0 && is_response && + mg_vcasecmp(&hm->uri, "204") == 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + return req_len; +} + +static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt, + va_list *ap) { + size_t len = c->send.len; + mg_send(c, " \r\n", 10); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + if (c->send.len >= len + 10) { + mg_snprintf((char *) c->send.buf + len, 9, "%08lx", c->send.len - len - 10); + c->send.buf[len + 8] = '\r'; + if (c->send.len == len + 10) c->is_resp = 0; // Last chunk, reset marker + } + mg_send(c, "\r\n", 2); +} + +void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_http_vprintf_chunk(c, fmt, &ap); + va_end(ap); +} + +void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) { + mg_printf(c, "%lx\r\n", (unsigned long) len); + mg_send(c, buf, len); + mg_send(c, "\r\n", 2); + if (len == 0) c->is_resp = 0; +} + +// clang-format off +static const char *mg_http_status_code_str(int status_code) { + switch (status_code) { + case 100: return "Continue"; + case 201: return "Created"; + case 202: return "Accepted"; + case 204: return "No Content"; + case 206: return "Partial Content"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 304: return "Not Modified"; + case 400: return "Bad Request"; + case 401: return "Unauthorized"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 418: return "I'm a teapot"; + case 500: return "Internal Server Error"; + case 501: return "Not Implemented"; + default: return "OK"; + } +} +// clang-format on + +void mg_http_reply(struct mg_connection *c, int code, const char *headers, + const char *fmt, ...) { + va_list ap; + size_t len; + mg_printf(c, "HTTP/1.1 %d %s\r\n%sContent-Length: \r\n\r\n", code, + mg_http_status_code_str(code), headers == NULL ? "" : headers); + len = c->send.len; + va_start(ap, fmt); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, &ap); + va_end(ap); + if (c->send.len > 15) { + mg_snprintf((char *) &c->send.buf[len - 14], 11, "%010lu", + (unsigned long) (c->send.len - len)); + c->is_resp = 0; + c->send.buf[len - 4] = '\r'; // Change ending 0 to space + } + c->is_resp = 0; +} + +static void http_cb(struct mg_connection *, int, void *, void *); +static void restore_http_cb(struct mg_connection *c) { + mg_fs_close((struct mg_fd *) c->pfn_data); + c->pfn_data = NULL; + c->pfn = http_cb; + c->is_resp = 0; +} + +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime); +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime) { + mg_snprintf(buf, len, "\"%lld.%lld\"", (int64_t) mtime, (int64_t) size); + return buf; +} + +static void static_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_WRITE || ev == MG_EV_POLL) { + struct mg_fd *fd = (struct mg_fd *) fn_data; + // Read to send IO buffer directly, avoid extra on-stack buffer + size_t n, max = MG_IO_SIZE, space, *cl = (size_t *) c->label; + if (c->send.size < max) mg_iobuf_resize(&c->send, max); + if (c->send.len >= c->send.size) return; // Rate limit + if ((space = c->send.size - c->send.len) > *cl) space = *cl; + n = fd->fs->rd(fd->fd, c->send.buf + c->send.len, space); + c->send.len += n; + *cl -= n; + if (n == 0) restore_http_cb(c); + } else if (ev == MG_EV_CLOSE) { + restore_http_cb(c); + } + (void) ev_data; +} + +// Known mime types. Keep it outside guess_content_type() function, since +// some environments don't like it defined there. +// clang-format off +static struct mg_str s_known_types[] = { + MG_C_STR("html"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("htm"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("css"), MG_C_STR("text/css; charset=utf-8"), + MG_C_STR("js"), MG_C_STR("text/javascript; charset=utf-8"), + MG_C_STR("gif"), MG_C_STR("image/gif"), + MG_C_STR("png"), MG_C_STR("image/png"), + MG_C_STR("jpg"), MG_C_STR("image/jpeg"), + MG_C_STR("jpeg"), MG_C_STR("image/jpeg"), + MG_C_STR("woff"), MG_C_STR("font/woff"), + MG_C_STR("ttf"), MG_C_STR("font/ttf"), + MG_C_STR("svg"), MG_C_STR("image/svg+xml"), + MG_C_STR("txt"), MG_C_STR("text/plain; charset=utf-8"), + MG_C_STR("avi"), MG_C_STR("video/x-msvideo"), + MG_C_STR("csv"), MG_C_STR("text/csv"), + MG_C_STR("doc"), MG_C_STR("application/msword"), + MG_C_STR("exe"), MG_C_STR("application/octet-stream"), + MG_C_STR("gz"), MG_C_STR("application/gzip"), + MG_C_STR("ico"), MG_C_STR("image/x-icon"), + MG_C_STR("json"), MG_C_STR("application/json"), + MG_C_STR("mov"), MG_C_STR("video/quicktime"), + MG_C_STR("mp3"), MG_C_STR("audio/mpeg"), + MG_C_STR("mp4"), MG_C_STR("video/mp4"), + MG_C_STR("mpeg"), MG_C_STR("video/mpeg"), + MG_C_STR("pdf"), MG_C_STR("application/pdf"), + MG_C_STR("shtml"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("tgz"), MG_C_STR("application/tar-gz"), + MG_C_STR("wav"), MG_C_STR("audio/wav"), + MG_C_STR("webp"), MG_C_STR("image/webp"), + MG_C_STR("zip"), MG_C_STR("application/zip"), + MG_C_STR("3gp"), MG_C_STR("video/3gpp"), + {0, 0}, +}; +// clang-format on + +static struct mg_str guess_content_type(struct mg_str path, const char *extra) { + struct mg_str k, v, s = mg_str(extra); + size_t i = 0; + + // Shrink path to its extension only + while (i < path.len && path.ptr[path.len - i - 1] != '.') i++; + path.ptr += path.len - i; + path.len = i; + + // Process user-provided mime type overrides, if any + while (mg_commalist(&s, &k, &v)) { + if (mg_strcmp(path, k) == 0) return v; + } + + // Process built-in mime types + for (i = 0; s_known_types[i].ptr != NULL; i += 2) { + if (mg_strcmp(path, s_known_types[i]) == 0) return s_known_types[i + 1]; + } + + return mg_str("text/plain; charset=utf-8"); +} + +static int getrange(struct mg_str *s, int64_t *a, int64_t *b) { + size_t i, numparsed = 0; + // MG_INFO(("%.*s", (int) s->len, s->ptr)); + for (i = 0; i + 6 < s->len; i++) { + if (memcmp(&s->ptr[i], "bytes=", 6) == 0) { + struct mg_str p = mg_str_n(s->ptr + i + 6, s->len - i - 6); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + *a = mg_to64(p); + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + while (p.len && p.ptr[0] >= '0' && p.ptr[0] <= '9') p.ptr++, p.len--; + if (p.len && p.ptr[0] == '-') p.ptr++, p.len--; + *b = mg_to64(p); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + break; + } + } + return (int) numparsed; +} + +void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm, + const char *path, + const struct mg_http_serve_opts *opts) { + char etag[64], tmp[MG_PATH_MAX]; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_fd *fd = path == NULL ? NULL : mg_fs_open(fs, path, MG_FS_READ); + size_t size = 0; + time_t mtime = 0; + struct mg_str *inm = NULL; + struct mg_str mime = guess_content_type(mg_str(path), opts->mime_types); + bool gzip = false; + + // If file does not exist, we try to open file PATH.gz - and if such + // pre-compressed .gz file exists, serve it with the Content-Encoding: gzip + // Note - we ignore Accept-Encoding, cause we don't have a choice + if (fd == NULL) { + MG_DEBUG(("NULL [%s]", path)); + mg_snprintf(tmp, sizeof(tmp), "%s.gz", path); + if ((fd = mg_fs_open(fs, tmp, MG_FS_READ)) != NULL) { + gzip = true; + path = tmp; + } else if (opts->page404 != NULL) { + // No precompressed file, serve 404 + fd = mg_fs_open(fs, opts->page404, MG_FS_READ); + mime = guess_content_type(mg_str(path), opts->mime_types); + path = opts->page404; + } + } + + if (fd == NULL || fs->st(path, &size, &mtime) == 0) { + mg_http_reply(c, 404, opts->extra_headers, "Not found\n"); + mg_fs_close(fd); + // NOTE: mg_http_etag() call should go first! + } else if (mg_http_etag(etag, sizeof(etag), size, mtime) != NULL && + (inm = mg_http_get_header(hm, "If-None-Match")) != NULL && + mg_vcasecmp(inm, etag) == 0) { + mg_fs_close(fd); + mg_http_reply(c, 304, opts->extra_headers, ""); + } else { + int n, status = 200; + char range[100]; + int64_t r1 = 0, r2 = 0, cl = (int64_t) size; + + // Handle Range header + struct mg_str *rh = mg_http_get_header(hm, "Range"); + range[0] = '\0'; + if (rh != NULL && (n = getrange(rh, &r1, &r2)) > 0 && r1 >= 0 && r2 >= 0) { + // If range is specified like "400-", set second limit to content len + if (n == 1) r2 = cl - 1; + if (r1 > r2 || r2 >= cl) { + status = 416; + cl = 0; + mg_snprintf(range, sizeof(range), "Content-Range: bytes */%lld\r\n", + (int64_t) size); + } else { + status = 206; + cl = r2 - r1 + 1; + mg_snprintf(range, sizeof(range), + "Content-Range: bytes %lld-%lld/%lld\r\n", r1, r1 + cl - 1, + (int64_t) size); + fs->sk(fd->fd, (size_t) r1); + } + } + mg_printf(c, + "HTTP/1.1 %d %s\r\n" + "Content-Type: %.*s\r\n" + "Etag: %s\r\n" + "Content-Length: %llu\r\n" + "%s%s%s\r\n", + status, mg_http_status_code_str(status), (int) mime.len, mime.ptr, + etag, cl, gzip ? "Content-Encoding: gzip\r\n" : "", range, + opts->extra_headers ? opts->extra_headers : ""); + if (mg_vcasecmp(&hm->method, "HEAD") == 0) { + c->is_draining = 1; + c->is_resp = 0; + mg_fs_close(fd); + } else { + c->pfn = static_cb; + c->pfn_data = fd; + *(size_t *) c->label = (size_t) cl; // Track to-be-sent content length + } + } +} + +struct printdirentrydata { + struct mg_connection *c; + struct mg_http_message *hm; + const struct mg_http_serve_opts *opts; + const char *dir; +}; + +static void printdirentry(const char *name, void *userdata) { + struct printdirentrydata *d = (struct printdirentrydata *) userdata; + struct mg_fs *fs = d->opts->fs == NULL ? &mg_fs_posix : d->opts->fs; + size_t size = 0; + time_t t = 0; + char path[MG_PATH_MAX], sz[40], mod[40]; + int flags, n = 0; + + // MG_DEBUG(("[%s] [%s]", d->dir, name)); + if (mg_snprintf(path, sizeof(path), "%s%c%s", d->dir, '/', name) > + sizeof(path)) { + MG_ERROR(("%s truncated", name)); + } else if ((flags = fs->st(path, &size, &t)) == 0) { + MG_ERROR(("%lu stat(%s): %d", d->c->id, path, errno)); + } else { + const char *slash = flags & MG_FS_DIR ? "/" : ""; + if (flags & MG_FS_DIR) { + mg_snprintf(sz, sizeof(sz), "%s", "[DIR]"); + } else { + mg_snprintf(sz, sizeof(sz), "%lld", (uint64_t) size); + } +#if defined(MG_HTTP_DIRLIST_TIME) + char time_str[30]; + struct tm *time_info = localtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#elif defined(MG_HTTP_DIRLIST_TIME_UTC) + char time_str[30]; + struct tm *time_info = gmtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#else + mg_snprintf(mod, sizeof(mod), "%ld", (unsigned long) t); +#endif + n = (int) mg_url_encode(name, strlen(name), path, sizeof(path)); + mg_printf(d->c, + " %s%s" + "%s%s\n", + n, path, slash, name, slash, (unsigned long) t, mod, + flags & MG_FS_DIR ? (int64_t) -1 : (int64_t) size, sz); + } +} + +static void listdir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *dir) { + const char *sort_js_code = + ""; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct printdirentrydata d = {c, hm, opts, dir}; + char tmp[10], buf[MG_PATH_MAX]; + size_t off, n; + int len = mg_url_decode(hm->uri.ptr, hm->uri.len, buf, sizeof(buf), 0); + struct mg_str uri = len > 0 ? mg_str_n(buf, (size_t) len) : hm->uri; + + mg_printf(c, + "HTTP/1.1 200 OK\r\n" + "Content-Type: text/html; charset=utf-8\r\n" + "%s" + "Content-Length: \r\n\r\n", + opts->extra_headers == NULL ? "" : opts->extra_headers); + off = c->send.len; // Start of body + mg_printf(c, + "Index of %.*s%s%s" + "" + "

Index of %.*s

" + "" + "" + "" + "" + "\n", + (int) uri.len, uri.ptr, sort_js_code, sort_js_code2, (int) uri.len, + uri.ptr); + mg_printf(c, "%s", + " " + "\n"); + + fs->ls(dir, printdirentry, &d); + mg_printf(c, + "" + "
Name" + "ModifiedSize
..[DIR]
Mongoose v.%s
\n", + MG_VERSION); + n = mg_snprintf(tmp, sizeof(tmp), "%lu", (unsigned long) (c->send.len - off)); + if (n > sizeof(tmp)) n = 0; + memcpy(c->send.buf + off - 12, tmp, n); // Set content length + c->is_resp = 0; // Mark response end +} + +// Resolve requested file into `path` and return its fs->st() result +static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, struct mg_str url, struct mg_str dir, + char *path, size_t path_size) { + int flags, tmp; + // Append URI to the root_dir, and sanitize it + size_t n = mg_snprintf(path, path_size, "%.*s", (int) dir.len, dir.ptr); + if (n > path_size) n = path_size; + path[path_size - 1] = '\0'; + if (n + 2 < path_size) path[n++] = '/', path[n] = '\0'; + mg_url_decode(hm->uri.ptr + url.len, hm->uri.len - url.len, path + n, + path_size - n, 0); + path[path_size - 1] = '\0'; // Double-check + mg_remove_double_dots(path); + n = strlen(path); + while (n > 1 && path[n - 1] == '/') path[--n] = 0; // Trim trailing slashes + flags = mg_vcmp(&hm->uri, "/") == 0 ? MG_FS_DIR : fs->st(path, NULL, NULL); + MG_VERBOSE(("%lu %.*s -> %s %d", c->id, (int) hm->uri.len, hm->uri.ptr, path, + flags)); + if (flags == 0) { + // Do nothing - let's caller decide + } else if ((flags & MG_FS_DIR) && hm->uri.len > 0 && + hm->uri.ptr[hm->uri.len - 1] != '/') { + mg_printf(c, + "HTTP/1.1 301 Moved\r\n" + "Location: %.*s/\r\n" + "Content-Length: 0\r\n" + "\r\n", + (int) hm->uri.len, hm->uri.ptr); + flags = -1; + } else if (flags & MG_FS_DIR) { + if (((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX) > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0) || + (mg_snprintf(path + n, path_size - n, "/index.shtml") > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0))) { + flags = tmp; + } else if ((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX ".gz") > + 0 && + (tmp = fs->st(path, NULL, NULL)) != + 0)) { // check for gzipped index + flags = tmp; + path[n + 1 + strlen(MG_HTTP_INDEX)] = + '\0'; // Remove appended .gz in index file name + } else { + path[n] = '\0'; // Remove appended index file name + } + } + return flags; +} + +static int uri_to_path(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *path, + size_t path_size) { + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_str k, v, s = mg_str(opts->root_dir), u = {0, 0}, p = {0, 0}; + while (mg_commalist(&s, &k, &v)) { + if (v.len == 0) v = k, k = mg_str("/"); + if (hm->uri.len < k.len) continue; + if (mg_strcmp(k, mg_str_n(hm->uri.ptr, k.len)) != 0) continue; + u = k, p = v; + } + return uri_to_path2(c, hm, fs, u, p, path, path_size); +} + +void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts) { + char path[MG_PATH_MAX]; + const char *sp = opts->ssi_pattern; + int flags = uri_to_path(c, hm, opts, path, sizeof(path)); + if (flags < 0) { + // Do nothing: the response has already been sent by uri_to_path() + } else if (flags & MG_FS_DIR) { + listdir(c, hm, opts, path); + } else if (flags && sp != NULL && + mg_globmatch(sp, strlen(sp), path, strlen(path))) { + mg_http_serve_ssi(c, opts->root_dir, path); + } else { + mg_http_serve_file(c, hm, path, opts); + } +} + +static bool mg_is_url_safe(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || + (c >= 'A' && c <= 'Z') || c == '.' || c == '_' || c == '-' || c == '~'; +} + +size_t mg_url_encode(const char *s, size_t sl, char *buf, size_t len) { + size_t i, n = 0; + for (i = 0; i < sl; i++) { + int c = *(unsigned char *) &s[i]; + if (n + 4 >= len) return 0; + if (mg_is_url_safe(c)) { + buf[n++] = s[i]; + } else { + buf[n++] = '%'; + mg_hex(&s[i], 1, &buf[n]); + n += 2; + } + } + return n; +} + +void mg_http_creds(struct mg_http_message *hm, char *user, size_t userlen, + char *pass, size_t passlen) { + struct mg_str *v = mg_http_get_header(hm, "Authorization"); + user[0] = pass[0] = '\0'; + if (v != NULL && v->len > 6 && memcmp(v->ptr, "Basic ", 6) == 0) { + char buf[256]; + int n = mg_base64_decode(v->ptr + 6, (int) v->len - 6, buf); + const char *p = (const char *) memchr(buf, ':', n > 0 ? (size_t) n : 0); + if (p != NULL) { + mg_snprintf(user, userlen, "%.*s", (int) (p - buf), buf); + mg_snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1); + } + } else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) { + mg_snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7); + } else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) { + struct mg_str t = mg_http_get_header_var(*v, mg_str_n("access_token", 12)); + if (t.len > 0) mg_snprintf(pass, passlen, "%.*s", (int) t.len, t.ptr); + } else { + mg_http_get_var(&hm->query, "access_token", pass, passlen); + } +} + +static struct mg_str stripquotes(struct mg_str s) { + return s.len > 1 && s.ptr[0] == '"' && s.ptr[s.len - 1] == '"' + ? mg_str_n(s.ptr + 1, s.len - 2) + : s; +} + +struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v) { + size_t i; + for (i = 0; v.len > 0 && i + v.len + 2 < s.len; i++) { + if (s.ptr[i + v.len] == '=' && memcmp(&s.ptr[i], v.ptr, v.len) == 0) { + const char *p = &s.ptr[i + v.len + 1], *b = p, *x = &s.ptr[s.len]; + int q = p < x && *p == '"' ? 1 : 0; + while (p < x && + (q ? p == b || *p != '"' : *p != ';' && *p != ' ' && *p != ',')) + p++; + // MG_INFO(("[%.*s] [%.*s] [%.*s]", (int) s.len, s.ptr, (int) v.len, + // v.ptr, (int) (p - b), b)); + return stripquotes(mg_str_n(b, (size_t) (p - b + q))); + } + } + return mg_str_n(NULL, 0); +} + +bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) { + return mg_match(hm->uri, mg_str(glob), NULL); +} + +long mg_http_upload(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, const char *path, size_t max_size) { + char buf[20] = "0"; + long res = 0, offset; + mg_http_get_var(&hm->query, "offset", buf, sizeof(buf)); + offset = strtol(buf, NULL, 0); + if (hm->body.len == 0) { + mg_http_reply(c, 200, "", "%ld", res); // Nothing to write + } else { + struct mg_fd *fd; + size_t current_size = 0; + MG_DEBUG(("%s -> %d bytes @ %ld", path, (int) hm->body.len, offset)); + if (offset == 0) fs->rm(path); // If offset if 0, truncate file + fs->st(path, ¤t_size, NULL); + if (offset < 0) { + mg_http_reply(c, 400, "", "offset required"); + res = -1; + } else if (offset > 0 && current_size != (size_t) offset) { + mg_http_reply(c, 400, "", "%s: offset mismatch", path); + res = -2; + } else if ((size_t) offset + hm->body.len > max_size) { + mg_http_reply(c, 400, "", "%s: over max size of %lu", path, + (unsigned long) max_size); + res = -3; + } else if ((fd = mg_fs_open(fs, path, MG_FS_WRITE)) == NULL) { + mg_http_reply(c, 400, "", "open(%s): %d", path, errno); + res = -4; + } else { + res = offset + (long) fs->wr(fd->fd, hm->body.ptr, hm->body.len); + mg_fs_close(fd); + mg_http_reply(c, 200, "", "%ld", res); + } + } + return res; +} + +int mg_http_status(const struct mg_http_message *hm) { + return atoi(hm->uri.ptr); +} + +// If a server sends data to the client using chunked encoding, Mongoose strips +// off the chunking prefix (hex length and \r\n) and suffix (\r\n), appends the +// stripped data to the body, and fires the MG_EV_HTTP_CHUNK event. When zero +// chunk is received, we fire MG_EV_HTTP_MSG, and the body already has all +// chunking prefixes/suffixes stripped. +// +// If a server sends data without chunked encoding, we also fire a series of +// MG_EV_HTTP_CHUNK events for every received piece of data, and then we fire +// MG_EV_HTTP_MSG event in the end. +// +// We track total processed length in the c->pfn_data, which is a void * +// pointer: we store a size_t value there. +static bool getchunk(struct mg_str s, size_t *prefixlen, size_t *datalen) { + size_t i = 0, n; + while (i < s.len && s.ptr[i] != '\r' && s.ptr[i] != '\n') i++; + n = mg_unhexn(s.ptr, i); + // MG_INFO(("%d %d", (int) (i + n + 4), (int) s.len)); + if (s.len < i + n + 4) return false; // Chunk not yet fully buffered + if (s.ptr[i] != '\r' || s.ptr[i + 1] != '\n') return false; + if (s.ptr[i + n + 2] != '\r' || s.ptr[i + n + 3] != '\n') return false; + *prefixlen = i + 2; + *datalen = n; + return true; +} + +static bool mg_is_chunked(struct mg_http_message *hm) { + const char *needle = "chunked"; + struct mg_str *te = mg_http_get_header(hm, "Transfer-Encoding"); + return te != NULL && mg_vcasecmp(te, needle) == 0; +} + +void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm) { + size_t ofs = (size_t) (hm->chunk.ptr - (char *) c->recv.buf); + mg_iobuf_del(&c->recv, ofs, hm->chunk.len); + c->pfn_data = (void *) ((size_t) c->pfn_data | MG_DMARK); +} + +static void deliver_chunked_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + // | ... headers ... | HEXNUM\r\n ..data.. \r\n | ...... + // +------------------+--------------------------+---- + // | hlen | chunk1 | ...... + char *buf = (char *) &c->recv.buf[hlen], *p = buf; + size_t len = c->recv.len - hlen; + size_t processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t mark, pl, dl, del = 0, ofs = 0; + bool last = false; + if (processed <= len) len -= processed, buf += processed; + while (!last && getchunk(mg_str_n(buf + ofs, len - ofs), &pl, &dl)) { + size_t saved = c->recv.len; + memmove(p + processed, buf + ofs + pl, dl); + // MG_INFO(("P2 [%.*s]", (int) (processed + dl), p)); + hm->chunk = mg_str_n(p + processed, dl); + mg_call(c, MG_EV_HTTP_CHUNK, hm); + ofs += pl + dl + 2, del += pl + 2; // 2 is for \r\n suffix + processed += dl; + if (c->recv.len != saved) processed -= dl, buf -= dl; + mg_hexdump(c->recv.buf, hlen + processed); + last = (dl == 0); + } + mg_iobuf_del(&c->recv, hlen + processed, del); + mark = ((size_t) c->pfn_data) & MG_DMARK; + c->pfn_data = (void *) (processed | mark); + if (last) { + hm->body.len = processed; + hm->message.len = hlen + processed; + c->pfn_data = NULL; + if (mark) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + // MG_INFO(("LAST, mark: %lx", mark)); + // mg_hexdump(c->recv.buf, c->recv.len); + } +} + +static void deliver_normal_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + size_t left, processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t deleted = ((size_t) c->pfn_data) & MG_DMARK; + hm->chunk = mg_str_n((char *) &c->recv.buf[hlen], c->recv.len - hlen); + if (processed <= hm->chunk.len && !deleted) { + hm->chunk.len -= processed; + hm->chunk.ptr += processed; + } + left = hm->body.len < processed ? 0 : hm->body.len - processed; + if (hm->chunk.len > left) hm->chunk.len = left; + if (hm->chunk.len > 0) mg_call(c, MG_EV_HTTP_CHUNK, hm); + processed += hm->chunk.len; + deleted = ((size_t) c->pfn_data) & MG_DMARK; // Re-evaluate after user call + if (processed >= hm->body.len) { // Last, 0-len chunk + hm->chunk.len = 0; // Reset length + mg_call(c, MG_EV_HTTP_CHUNK, hm); // Call user handler + c->pfn_data = NULL; // Reset processed counter + if (processed && deleted) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + } else { + c->pfn_data = (void *) (processed | deleted); // if it is set + } +} + +static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ || ev == MG_EV_CLOSE) { + struct mg_http_message hm; + // mg_hexdump(c->recv.buf, c->recv.len); + while (c->recv.buf != NULL && c->recv.len > 0) { + bool next = false; + int hlen = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm); + if (hlen < 0) { + mg_error(c, "HTTP parse:\n%.*s", (int) c->recv.len, c->recv.buf); + break; + } + if (c->is_resp) break; // Response is still generated + if (hlen == 0) break; // Request is not buffered yet + if (ev == MG_EV_CLOSE) { // If client did not set Content-Length + hm.message.len = c->recv.len; // and closes now, deliver a MSG + hm.body.len = hm.message.len - (size_t) (hm.body.ptr - hm.message.ptr); + } + if (mg_is_chunked(&hm)) { + deliver_chunked_chunks(c, (size_t) hlen, &hm, &next); + } else { + deliver_normal_chunks(c, (size_t) hlen, &hm, &next); + } + if (next) continue; // Chunks & request were deleted + // Chunk events are delivered. If we have full body, deliver MSG + if (c->recv.len < hm.message.len) break; + if (c->is_accepted) c->is_resp = 1; // Start generating response + mg_call(c, MG_EV_HTTP_MSG, &hm); // User handler can clear is_resp + mg_iobuf_del(&c->recv, 0, hm.message.len); + } + } + (void) evd, (void) fnd; +} + +struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/iobuf.c" +#endif + + + + +// Not using memset for zeroing memory, cause it can be dropped by compiler +// See https://github.com/cesanta/mongoose/pull/1265 +static void zeromem(volatile unsigned char *buf, size_t len) { + if (buf != NULL) { + while (len--) *buf++ = 0; + } +} + +static size_t roundup(size_t size, size_t align) { + return align == 0 ? size : (size + align - 1) / align * align; +} + +int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) { + int ok = 1; + new_size = roundup(new_size, io->align); + if (new_size == 0) { + zeromem(io->buf, io->size); + free(io->buf); + io->buf = NULL; + io->len = io->size = 0; + } else if (new_size != io->size) { + // NOTE(lsm): do not use realloc here. Use calloc/free only, to ease the + // porting to some obscure platforms like FreeRTOS + void *p = calloc(1, new_size); + if (p != NULL) { + size_t len = new_size < io->len ? new_size : io->len; + if (len > 0 && io->buf != NULL) memmove(p, io->buf, len); + zeromem(io->buf, io->size); + free(io->buf); + io->buf = (unsigned char *) p; + io->size = new_size; + } else { + ok = 0; + MG_ERROR(("%lld->%lld", (uint64_t) io->size, (uint64_t) new_size)); + } + } + return ok; +} + +int mg_iobuf_init(struct mg_iobuf *io, size_t size, size_t align) { + io->buf = NULL; + io->align = align; + io->size = io->len = 0; + return mg_iobuf_resize(io, size); +} + +size_t mg_iobuf_add(struct mg_iobuf *io, size_t ofs, const void *buf, + size_t len) { + size_t new_size = roundup(io->len + len, io->align); + mg_iobuf_resize(io, new_size); // Attempt to resize + if (new_size != io->size) len = 0; // Resize failure, append nothing + if (ofs < io->len) memmove(io->buf + ofs + len, io->buf + ofs, io->len - ofs); + if (buf != NULL) memmove(io->buf + ofs, buf, len); + if (ofs > io->len) io->len += ofs - io->len; + io->len += len; + return len; +} + +size_t mg_iobuf_del(struct mg_iobuf *io, size_t ofs, size_t len) { + if (ofs > io->len) ofs = io->len; + if (ofs + len > io->len) len = io->len - ofs; + if (io->buf) memmove(io->buf + ofs, io->buf + ofs + len, io->len - ofs - len); + if (io->buf) zeromem(io->buf + io->len - len, len); + io->len -= len; + return len; +} + +void mg_iobuf_free(struct mg_iobuf *io) { + mg_iobuf_resize(io, 0); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/json.c" +#endif + + + + +static const char *escapeseq(int esc) { + return esc ? "\b\f\n\r\t\\\"" : "bfnrt\\\""; +} + +static char json_esc(int c, int esc) { + const char *p, *esc1 = escapeseq(esc), *esc2 = escapeseq(!esc); + for (p = esc1; *p != '\0'; p++) { + if (*p == c) return esc2[p - esc1]; + } + return 0; +} + +static int mg_pass_string(const char *s, int len) { + int i; + for (i = 0; i < len; i++) { + if (s[i] == '\\' && i + 1 < len && json_esc(s[i + 1], 1)) { + i++; + } else if (s[i] == '\0') { + return MG_JSON_INVALID; + } else if (s[i] == '"') { + return i; + } + } + return MG_JSON_INVALID; +} + +static double mg_atod(const char *p, int len, int *numlen) { + double d = 0.0; + int i = 0, sign = 1; + + // Sign + if (i < len && *p == '-') { + sign = -1, i++; + } else if (i < len && *p == '+') { + i++; + } + + // Decimal + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + d *= 10.0; + d += p[i] - '0'; + } + d *= sign; + + // Fractional + if (i < len && p[i] == '.') { + double frac = 0.0, base = 0.1; + i++; + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + frac += base * (p[i] - '0'); + base /= 10.0; + } + d += frac * sign; + } + + // Exponential + if (i < len && (p[i] == 'e' || p[i] == 'E')) { + int j, exp = 0, minus = 0; + i++; + if (i < len && p[i] == '-') minus = 1, i++; + if (i < len && p[i] == '+') i++; + while (i < len && p[i] >= '0' && p[i] <= '9' && exp < 308) + exp = exp * 10 + (p[i++] - '0'); + if (minus) exp = -exp; + for (j = 0; j < exp; j++) d *= 10.0; + for (j = 0; j < -exp; j++) d /= 10.0; + } + + if (numlen != NULL) *numlen = i; + return d; +} + +int mg_json_get(struct mg_str json, const char *path, int *toklen) { + const char *s = json.ptr; + int len = (int) json.len; + enum { S_VALUE, S_KEY, S_COLON, S_COMMA_OR_EOO } expecting = S_VALUE; + unsigned char nesting[MG_JSON_MAX_DEPTH]; + int i = 0; // Current offset in `s` + int j = 0; // Offset in `s` we're looking for (return value) + int depth = 0; // Current depth (nesting level) + int ed = 0; // Expected depth + int pos = 1; // Current position in `path` + int ci = -1, ei = -1; // Current and expected index in array + + if (toklen) *toklen = 0; + if (path[0] != '$') return MG_JSON_INVALID; + +#define MG_CHECKRET(x) \ + do { \ + if (depth == ed && path[pos] == '\0' && ci == ei) { \ + if (toklen) *toklen = i - j + 1; \ + return j; \ + } \ + } while (0) + +// In the ascii table, the distance between `[` and `]` is 2. +// Ditto for `{` and `}`. Hence +2 in the code below. +#define MG_EOO(x) \ + do { \ + if (depth == ed && ci != ei) return MG_JSON_NOT_FOUND; \ + if (c != nesting[depth - 1] + 2) return MG_JSON_INVALID; \ + depth--; \ + MG_CHECKRET(x); \ + } while (0) + + for (i = 0; i < len; i++) { + unsigned char c = ((unsigned char *) s)[i]; + if (c == ' ' || c == '\t' || c == '\n' || c == '\r') continue; + switch (expecting) { + case S_VALUE: + // p("V %s [%.*s] %d %d %d %d\n", path, pos, path, depth, ed, ci, ei); + if (depth == ed) j = i; + if (c == '{') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '.' && ci == ei) { + // If we start the object, reset array indices + ed++, pos++, ci = ei = -1; + } + nesting[depth++] = c; + expecting = S_KEY; + break; + } else if (c == '[') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '[' && ei == ci) { + ed++, pos++, ci = 0; + for (ei = 0; path[pos] != ']' && path[pos] != '\0'; pos++) { + ei *= 10; + ei += path[pos] - '0'; + } + if (path[pos] != 0) pos++; + } + nesting[depth++] = c; + break; + } else if (c == ']' && depth > 0) { // Empty array + MG_EOO(']'); + } else if (c == 't' && i + 3 < len && memcmp(&s[i], "true", 4) == 0) { + i += 3; + } else if (c == 'n' && i + 3 < len && memcmp(&s[i], "null", 4) == 0) { + i += 3; + } else if (c == 'f' && i + 4 < len && memcmp(&s[i], "false", 5) == 0) { + i += 4; + } else if (c == '-' || ((c >= '0' && c <= '9'))) { + int numlen = 0; + mg_atod(&s[i], len - i, &numlen); + i += numlen - 1; + } else if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + i += n + 1; + } else { + return MG_JSON_INVALID; + } + MG_CHECKRET('V'); + if (depth == ed && ei >= 0) ci++; + expecting = S_COMMA_OR_EOO; + break; + + case S_KEY: + if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + if (i + 1 + n >= len) return MG_JSON_NOT_FOUND; + if (depth < ed) return MG_JSON_NOT_FOUND; + if (depth == ed && path[pos - 1] != '.') return MG_JSON_NOT_FOUND; + // printf("K %s [%.*s] [%.*s] %d %d %d\n", path, pos, path, n, + // &s[i + 1], n, depth, ed); + // NOTE(cpq): in the check sequence below is important. + // strncmp() must go first: it fails fast if the remaining length of + // the path is smaller than `n`. + if (depth == ed && path[pos - 1] == '.' && + strncmp(&s[i + 1], &path[pos], (size_t) n) == 0 && + (path[pos + n] == '\0' || path[pos + n] == '.' || + path[pos + n] == '[')) { + pos += n; + } + i += n + 1; + expecting = S_COLON; + } else if (c == '}') { // Empty object + MG_EOO('}'); + expecting = S_COMMA_OR_EOO; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COLON: + if (c == ':') { + expecting = S_VALUE; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COMMA_OR_EOO: + if (depth <= 0) { + return MG_JSON_INVALID; + } else if (c == ',') { + expecting = (nesting[depth - 1] == '{') ? S_KEY : S_VALUE; + } else if (c == ']' || c == '}') { + MG_EOO('O'); + if (depth == ed && ei >= 0) ci++; + } else { + return MG_JSON_INVALID; + } + break; + } + } + return MG_JSON_NOT_FOUND; +} + +bool mg_json_get_num(struct mg_str json, const char *path, double *v) { + int n, toklen, found = 0; + if ((n = mg_json_get(json, path, &toklen)) >= 0 && + (json.ptr[n] == '-' || (json.ptr[n] >= '0' && json.ptr[n] <= '9'))) { + if (v != NULL) *v = mg_atod(json.ptr + n, toklen, NULL); + found = 1; + } + return found; +} + +bool mg_json_get_bool(struct mg_str json, const char *path, bool *v) { + int found = 0, off = mg_json_get(json, path, NULL); + if (off >= 0 && (json.ptr[off] == 't' || json.ptr[off] == 'f')) { + if (v != NULL) *v = json.ptr[off] == 't'; + found = 1; + } + return found; +} + +static bool json_unescape(const char *s, size_t len, char *to, size_t n) { + size_t i, j; + for (i = 0, j = 0; i < len && j < n; i++, j++) { + if (s[i] == '\\' && i + 5 < len && s[i + 1] == 'u') { + // \uXXXX escape. We could process a simple one-byte chars + // \u00xx from the ASCII range. More complex chars would require + // dragging in a UTF8 library, which is too much for us + if (s[i + 2] != '0' || s[i + 3] != '0') return false; // Give up + ((unsigned char *) to)[j] = (unsigned char) mg_unhexn(s + i + 4, 2); + + i += 5; + } else if (s[i] == '\\' && i + 1 < len) { + char c = json_esc(s[i + 1], 0); + if (c == 0) return false; + to[j] = c; + i++; + } else { + to[j] = s[i]; + } + } + if (j >= n) return false; + if (n > 0) to[j] = '\0'; + return true; +} + +char *mg_json_get_str(struct mg_str json, const char *path) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && len > 1 && json.ptr[off] == '"') { + if ((result = (char *) calloc(1, (size_t) len)) != NULL && + !json_unescape(json.ptr + off + 1, (size_t) (len - 2), result, + (size_t) len)) { + free(result); + result = NULL; + } + } + return result; +} + +char *mg_json_get_b64(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len)) != NULL) { + int k = mg_base64_decode(json.ptr + off + 1, len - 2, result); + if (slen != NULL) *slen = k; + } + return result; +} + +char *mg_json_get_hex(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len / 2)) != NULL) { + mg_unhex(json.ptr + off + 1, (size_t) (len - 2), (uint8_t *) result); + result[len / 2 - 1] = '\0'; + if (slen != NULL) *slen = len / 2 - 1; + } + return result; +} + +long mg_json_get_long(struct mg_str json, const char *path, long dflt) { + double dv; + long result = dflt; + if (mg_json_get_num(json, path, &dv)) result = (long) dv; + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/log.c" +#endif + + + + + +static void default_logger(char c, void *param) { + putchar(c); + (void) c, (void) param; +} + +static int s_level = MG_LL_INFO; +static mg_pfn_t s_log_func = default_logger; +static void *s_log_func_param = NULL; + +void mg_log_set_fn(mg_pfn_t fn, void *param) { + s_log_func = fn; + s_log_func_param = param; +} + +static void logc(unsigned char c) { + s_log_func((char) c, s_log_func_param); +} + +static void logs(const char *buf, size_t len) { + size_t i; + for (i = 0; i < len; i++) logc(((unsigned char *) buf)[i]); +} + +void mg_log_set(int log_level) { + MG_DEBUG(("Setting log level to %d", log_level)); + s_level = log_level; +} + +bool mg_log_prefix(int level, const char *file, int line, const char *fname) { + if (level <= s_level) { + const char *p = strrchr(file, '/'); + char buf[41]; + size_t n; + if (p == NULL) p = strrchr(file, '\\'); + n = mg_snprintf(buf, sizeof(buf), "%llx %d %s:%d:%s", mg_millis(), level, + p == NULL ? file : p + 1, line, fname); + if (n > sizeof(buf) - 2) n = sizeof(buf) - 2; + while (n < sizeof(buf)) buf[n++] = ' '; + logs(buf, n - 1); + return true; + } else { + return false; + } +} + +void mg_log(const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_vxprintf(s_log_func, s_log_func_param, fmt, &ap); + va_end(ap); + logc((unsigned char) '\n'); +} + +static unsigned char nibble(unsigned c) { + return (unsigned char) (c < 10 ? c + '0' : c + 'W'); +} + +#define ISPRINT(x) ((x) >= ' ' && (x) <= '~') +void mg_hexdump(const void *buf, size_t len) { + const unsigned char *p = (const unsigned char *) buf; + unsigned char ascii[16], alen = 0; + size_t i; + for (i = 0; i < len; i++) { + if ((i % 16) == 0) { + // Print buffered ascii chars + if (i > 0) logs(" ", 2), logs((char *) ascii, 16), logc('\n'), alen = 0; + // Print hex address, then \t + logc(nibble((i >> 12) & 15)), logc(nibble((i >> 8) & 15)), + logc(nibble((i >> 4) & 15)), logc('0'), logs(" ", 3); + } + logc(nibble(p[i] >> 4)), logc(nibble(p[i] & 15)); // Two nibbles, e.g. c5 + logc(' '); // Space after hex number + ascii[alen++] = ISPRINT(p[i]) ? p[i] : '.'; // Add to the ascii buf + } + while (alen < 16) logs(" ", 3), ascii[alen++] = ' '; + logs(" ", 2), logs((char *) ascii, 16), logc('\n'); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/md5.c" +#endif + + + +#if defined(MG_ENABLE_MD5) && MG_ENABLE_MD5 + +static void mg_byte_reverse(unsigned char *buf, unsigned longs) { + if (MG_BIG_ENDIAN) { + do { + uint32_t t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32_t *) buf = t; + buf += 4; + } while (--longs); + } else { + (void) buf, (void) longs; // Little endian. Do nothing + } +} + +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +#define MD5STEP(f, w, x, y, z, data, s) \ + (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void mg_md5_init(mg_md5_ctx *ctx) { + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +static void mg_md5_transform(uint32_t buf[4], uint32_t const in[16]) { + uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +void mg_md5_update(mg_md5_ctx *ctx, const unsigned char *buf, size_t len) { + uint32_t t; + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++; + ctx->bits[1] += (uint32_t) len >> 29; + + t = (t >> 3) & 0x3f; + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + memcpy(ctx->in, buf, len); +} + +void mg_md5_final(mg_md5_ctx *ctx, unsigned char digest[16]) { + unsigned count; + unsigned char *p; + uint32_t *a; + + count = (ctx->bits[0] >> 3) & 0x3F; + + p = ctx->in + count; + *p++ = 0x80; + count = 64 - 1 - count; + if (count < 8) { + memset(p, 0, count); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + memset(ctx->in, 0, 56); + } else { + memset(p, 0, count - 8); + } + mg_byte_reverse(ctx->in, 14); + + a = (uint32_t *) ctx->in; + a[14] = ctx->bits[0]; + a[15] = ctx->bits[1]; + + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + mg_byte_reverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset((char *) ctx, 0, sizeof(*ctx)); +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/mqtt.c" +#endif + + + + + + + + +#define MQTT_CLEAN_SESSION 0x02 +#define MQTT_HAS_WILL 0x04 +#define MQTT_WILL_RETAIN 0x20 +#define MQTT_HAS_PASSWORD 0x40 +#define MQTT_HAS_USER_NAME 0x80 + +void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags, + uint32_t len) { + uint8_t buf[1 + sizeof(len)], *vlen = &buf[1]; + buf[0] = (uint8_t) ((cmd << 4) | flags); + do { + *vlen = len % 0x80; + len /= 0x80; + if (len > 0) *vlen |= 0x80; + vlen++; + } while (len > 0 && vlen < &buf[sizeof(buf)]); + mg_send(c, buf, (size_t) (vlen - buf)); +} + +static void mg_send_u16(struct mg_connection *c, uint16_t value) { + mg_send(c, &value, sizeof(value)); +} + +void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) { + char rnd[10], client_id[21], zero = 0; + struct mg_str cid = opts->client_id; + uint32_t total_len = 7 + 1 + 2 + 2; + uint8_t hdr[8] = {0, 4, 'M', 'Q', 'T', 'T', opts->version, 0}; + + if (cid.len == 0) { + mg_random(rnd, sizeof(rnd)); + mg_hex(rnd, sizeof(rnd), client_id); + client_id[sizeof(client_id) - 1] = '\0'; + cid = mg_str(client_id); + } + + if (hdr[6] == 0) hdr[6] = 4; // If version is not set, use 4 (3.1.1) + c->is_mqtt5 = hdr[6] == 5; // Set version 5 flag + hdr[7] = (uint8_t) ((opts->will_qos & 3) << 3); // Connection flags + if (opts->user.len > 0) { + total_len += 2 + (uint32_t) opts->user.len; + hdr[7] |= MQTT_HAS_USER_NAME; + } + if (opts->pass.len > 0) { + total_len += 2 + (uint32_t) opts->pass.len; + hdr[7] |= MQTT_HAS_PASSWORD; + } + if (opts->will_topic.len > 0 && opts->will_message.len > 0) { + total_len += + 4 + (uint32_t) opts->will_topic.len + (uint32_t) opts->will_message.len; + hdr[7] |= MQTT_HAS_WILL; + } + if (opts->clean || cid.len == 0) hdr[7] |= MQTT_CLEAN_SESSION; + if (opts->will_retain) hdr[7] |= MQTT_WILL_RETAIN; + total_len += (uint32_t) cid.len; + if (c->is_mqtt5) total_len += 1U + (hdr[7] & MQTT_HAS_WILL ? 1U : 0); + + mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len); + mg_send(c, hdr, sizeof(hdr)); + // keepalive == 0 means "do not disconnect us!" + mg_send_u16(c, mg_htons((uint16_t) opts->keepalive)); + + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // V5 properties + mg_send_u16(c, mg_htons((uint16_t) cid.len)); + mg_send(c, cid.ptr, cid.len); + + if (hdr[7] & MQTT_HAS_WILL) { + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // will props + mg_send_u16(c, mg_htons((uint16_t) opts->will_topic.len)); + mg_send(c, opts->will_topic.ptr, opts->will_topic.len); + mg_send_u16(c, mg_htons((uint16_t) opts->will_message.len)); + mg_send(c, opts->will_message.ptr, opts->will_message.len); + } + if (opts->user.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->user.len)); + mg_send(c, opts->user.ptr, opts->user.len); + } + if (opts->pass.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->pass.len)); + mg_send(c, opts->pass.ptr, opts->pass.len); + } +} + +void mg_mqtt_pub(struct mg_connection *c, struct mg_str topic, + struct mg_str data, int qos, bool retain) { + uint8_t flags = (uint8_t) (((qos & 3) << 1) | (retain ? 1 : 0)), zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + (uint32_t) data.len; + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) topic.len, (char *) topic.ptr, + (int) data.len, (char *) data.ptr)); + if (qos > 0) len += 2; + if (c->is_mqtt5) len++; + mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, len); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + if (qos > 0) { + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + } + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send(c, data.ptr, data.len); +} + +void mg_mqtt_sub(struct mg_connection *c, struct mg_str topic, int qos) { + uint8_t qos_ = qos & 3, zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + 2 + 1 + (c->is_mqtt5 ? 1 : 0); + mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, 2, len); + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + mg_send(c, &qos_, sizeof(qos_)); +} + +int mg_mqtt_parse(const uint8_t *buf, size_t len, uint8_t version, + struct mg_mqtt_message *m) { + uint8_t lc = 0, *p, *end; + uint32_t n = 0, len_len = 0; + + memset(m, 0, sizeof(*m)); + m->dgram.ptr = (char *) buf; + if (len < 2) return MQTT_INCOMPLETE; + m->cmd = (uint8_t) (buf[0] >> 4); + m->qos = (buf[0] >> 1) & 3; + + n = len_len = 0; + p = (uint8_t *) buf + 1; + while ((size_t) (p - buf) < len) { + lc = *((uint8_t *) p++); + n += (uint32_t) ((lc & 0x7f) << 7 * len_len); + len_len++; + if (!(lc & 0x80)) break; + if (len_len >= 4) return MQTT_MALFORMED; + } + end = p + n; + if ((lc & 0x80) || (end > buf + len)) return MQTT_INCOMPLETE; + m->dgram.len = (size_t) (end - buf); + + switch (m->cmd) { + case MQTT_CMD_CONNACK: + if (end - p < 2) return MQTT_MALFORMED; + m->ack = p[1]; + break; + case MQTT_CMD_PUBACK: + case MQTT_CMD_PUBREC: + case MQTT_CMD_PUBREL: + case MQTT_CMD_PUBCOMP: + case MQTT_CMD_SUBSCRIBE: + case MQTT_CMD_SUBACK: + case MQTT_CMD_UNSUBSCRIBE: + case MQTT_CMD_UNSUBACK: + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + break; + case MQTT_CMD_PUBLISH: { + if (p + 2 > end) return MQTT_MALFORMED; + m->topic.len = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + m->topic.ptr = (char *) p + 2; + p += 2 + m->topic.len; + if (p > end) return MQTT_MALFORMED; + if (m->qos > 0) { + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + } + if (p >= end) return MQTT_MALFORMED; + if (version == 5) p += 1 + p[0]; // Skip options + if (p > end) return MQTT_MALFORMED; + m->data.ptr = (char *) p; + m->data.len = (size_t) (end - p); + break; + } + default: + break; + } + return MQTT_OK; +} + +static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_READ) { + for (;;) { + uint8_t version = c->is_mqtt5 ? 5 : 4; + struct mg_mqtt_message mm; + int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, version, &mm); + if (rc == MQTT_MALFORMED) { + MG_ERROR(("%lu MQTT malformed message", c->id)); + c->is_closing = 1; + break; + } else if (rc == MQTT_OK) { + MG_VERBOSE(("%lu MQTT CMD %d len %d [%.*s]", c->id, mm.cmd, + (int) mm.dgram.len, (int) mm.data.len, mm.data.ptr)); + switch (mm.cmd) { + case MQTT_CMD_CONNACK: + mg_call(c, MG_EV_MQTT_OPEN, &mm.ack); + if (mm.ack == 0) { + MG_DEBUG(("%lu Connected", c->id)); + } else { + MG_ERROR(("%lu MQTT auth failed, code %d", c->id, mm.ack)); + c->is_closing = 1; + } + break; + case MQTT_CMD_PUBLISH: { + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len, + mm.topic.ptr, (int) mm.data.len, mm.data.ptr)); + if (mm.qos > 0) { + uint16_t id = mg_htons(mm.id); + mg_mqtt_send_header(c, MQTT_CMD_PUBACK, 0, sizeof(id)); + mg_send(c, &id, sizeof(id)); + } + mg_call(c, MG_EV_MQTT_MSG, &mm); + break; + } + } + mg_call(c, MG_EV_MQTT_CMD, &mm); + mg_iobuf_del(&c->recv, 0, mm.dgram.len); + } else { + break; + } + } + } + (void) ev_data; + (void) fn_data; +} + +void mg_mqtt_ping(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGREQ, 0, 0); +} + +void mg_mqtt_pong(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGRESP, 0, 0); +} + +void mg_mqtt_disconnect(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_DISCONNECT, 0, 0); +} + +struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url, + const struct mg_mqtt_opts *opts, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) { + struct mg_mqtt_opts empty; + memset(&empty, 0, sizeof(empty)); + mg_mqtt_login(c, opts == NULL ? &empty : opts); + c->pfn = mqtt_cb; + } + return c; +} + +struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/net.c" +#endif + + + + + + + +size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list *ap) { + size_t old = c->send.len; + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + return c->send.len - old; +} + +size_t mg_printf(struct mg_connection *c, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vprintf(c, fmt, &ap); + va_end(ap); + return len; +} + +char *mg_straddr(struct mg_addr *a, char *buf, size_t len) { + char tmp[30]; + const char *fmt = a->is_ip6 ? "[%s]:%d" : "%s:%d"; + mg_ntoa(a, tmp, sizeof(tmp)); + mg_snprintf(buf, len, fmt, tmp, (int) mg_ntohs(a->port)); + return buf; +} + +char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) { + if (addr->is_ip6) { + uint16_t *p = (uint16_t *) addr->ip6; + mg_snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x", mg_htons(p[0]), + mg_htons(p[1]), mg_htons(p[2]), mg_htons(p[3]), mg_htons(p[4]), + mg_htons(p[5]), mg_htons(p[6]), mg_htons(p[7])); + } else { + uint8_t p[4]; + memcpy(p, &addr->ip, sizeof(p)); + mg_snprintf(buf, len, "%d.%d.%d.%d", (int) p[0], (int) p[1], (int) p[2], + (int) p[3]); + } + return buf; +} + +static bool mg_atonl(struct mg_str str, struct mg_addr *addr) { + if (mg_vcasecmp(&str, "localhost") != 0) return false; + addr->ip = mg_htonl(0x7f000001); + addr->is_ip6 = false; + return true; +} + +static bool mg_atone(struct mg_str str, struct mg_addr *addr) { + if (str.len > 0) return false; + addr->ip = 0; + addr->is_ip6 = false; + return true; +} + +static bool mg_aton4(struct mg_str str, struct mg_addr *addr) { + uint8_t data[4] = {0, 0, 0, 0}; + size_t i, num_dots = 0; + for (i = 0; i < str.len; i++) { + if (str.ptr[i] >= '0' && str.ptr[i] <= '9') { + int octet = data[num_dots] * 10 + (str.ptr[i] - '0'); + if (octet > 255) return false; + data[num_dots] = (uint8_t) octet; + } else if (str.ptr[i] == '.') { + if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false; + num_dots++; + } else { + return false; + } + } + if (num_dots != 3 || str.ptr[i - 1] == '.') return false; + memcpy(&addr->ip, data, sizeof(data)); + addr->is_ip6 = false; + return true; +} + +static bool mg_v4mapped(struct mg_str str, struct mg_addr *addr) { + int i; + if (str.len < 14) return false; + if (str.ptr[0] != ':' || str.ptr[1] != ':' || str.ptr[6] != ':') return false; + for (i = 2; i < 6; i++) { + if (str.ptr[i] != 'f' && str.ptr[i] != 'F') return false; + } + if (!mg_aton4(mg_str_n(&str.ptr[7], str.len - 7), addr)) return false; + memset(addr->ip6, 0, sizeof(addr->ip6)); + addr->ip6[10] = addr->ip6[11] = 255; + memcpy(&addr->ip6[12], &addr->ip, 4); + addr->is_ip6 = true; + return true; +} + +static bool mg_aton6(struct mg_str str, struct mg_addr *addr) { + size_t i, j = 0, n = 0, dc = 42; + if (str.len > 2 && str.ptr[0] == '[') str.ptr++, str.len -= 2; + if (mg_v4mapped(str, addr)) return true; + for (i = 0; i < str.len; i++) { + if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') || + (str.ptr[i] >= 'a' && str.ptr[i] <= 'f') || + (str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) { + unsigned long val; + if (i > j + 3) return false; + // MG_DEBUG(("%zu %zu [%.*s]", i, j, (int) (i - j + 1), &str.ptr[j])); + val = mg_unhexn(&str.ptr[j], i - j + 1); + addr->ip6[n] = (uint8_t) ((val >> 8) & 255); + addr->ip6[n + 1] = (uint8_t) (val & 255); + } else if (str.ptr[i] == ':') { + j = i + 1; + if (i > 0 && str.ptr[i - 1] == ':') { + dc = n; // Double colon + if (i > 1 && str.ptr[i - 2] == ':') return false; + } else if (i > 0) { + n += 2; + } + if (n > 14) return false; + addr->ip6[n] = addr->ip6[n + 1] = 0; // For trailing :: + } else { + return false; + } + } + if (n < 14 && dc == 42) return false; + if (n < 14) { + memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2); + memset(&addr->ip6[dc], 0, 14 - n); + } + addr->is_ip6 = true; + return true; +} + +bool mg_aton(struct mg_str str, struct mg_addr *addr) { + // MG_INFO(("[%.*s]", (int) str.len, str.ptr)); + return mg_atone(str, addr) || mg_atonl(str, addr) || mg_aton4(str, addr) || + mg_aton6(str, addr); +} + +struct mg_connection *mg_alloc_conn(struct mg_mgr *mgr) { + struct mg_connection *c = + (struct mg_connection *) calloc(1, sizeof(*c) + mgr->extraconnsize); + if (c != NULL) { + c->mgr = mgr; + c->send.align = c->recv.align = MG_IO_SIZE; + c->id = ++mgr->nextid; + } + return c; +} + +void mg_close_conn(struct mg_connection *c) { + mg_resolve_cancel(c); // Close any pending DNS query + LIST_DELETE(struct mg_connection, &c->mgr->conns, c); + if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL; + if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL; + // Order of operations is important. `MG_EV_CLOSE` event must be fired + // before we deallocate received data, see #1331 + mg_call(c, MG_EV_CLOSE, NULL); + MG_DEBUG(("%lu %p closed", c->id, c->fd)); + + mg_tls_free(c); + mg_iobuf_free(&c->recv); + mg_iobuf_free(&c->send); + memset(c, 0, sizeof(*c)); + free(c); +} + +struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if (url == NULL || url[0] == '\0') { + MG_ERROR(("null url")); + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM")); + } else { + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->is_udp = (strncmp(url, "udp:", 4) == 0); + c->fn = fn; + c->is_client = true; + c->fn_data = fn_data; + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + mg_call(c, MG_EV_OPEN, NULL); + mg_resolve(c, url); + } + return c; +} + +struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM %s", url)); + } else if (!mg_open_listener(c, url)) { + MG_ERROR(("Failed: %s, errno %d", url, errno)); + free(c); + c = NULL; + } else { + c->is_listening = 1; + c->is_udp = strncmp(url, "udp:", 4) == 0; + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fn = fn; + c->fn_data = fn_data; + mg_call(c, MG_EV_OPEN, NULL); + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + } + return c; +} + +struct mg_connection *mg_wrapfd(struct mg_mgr *mgr, int fd, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_alloc_conn(mgr); + if (c != NULL) { + c->fd = (void *) (size_t) fd; + c->fn = fn; + c->fn_data = fn_data; + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_OPEN, NULL); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + } + return c; +} + +struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds, + unsigned flags, void (*fn)(void *), void *arg) { + struct mg_timer *t = (struct mg_timer *) calloc(1, sizeof(*t)); + if (t != NULL) { + mg_timer_init(&mgr->timers, t, milliseconds, flags, fn, arg); + t->id = mgr->timerid++; + } + return t; +} + +void mg_mgr_free(struct mg_mgr *mgr) { + struct mg_connection *c; + struct mg_timer *tmp, *t = mgr->timers; + while (t != NULL) tmp = t->next, free(t), t = tmp; + mgr->timers = NULL; // Important. Next call to poll won't touch timers + for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1; + mg_mgr_poll(mgr, 0); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_DeleteSocketSet(mgr->ss); +#endif + MG_DEBUG(("All connections closed")); +#if MG_ENABLE_EPOLL + if (mgr->epoll_fd >= 0) close(mgr->epoll_fd), mgr->epoll_fd = -1; +#endif + free(mgr->priv); +} + +void mg_mgr_init(struct mg_mgr *mgr) { + memset(mgr, 0, sizeof(*mgr)); +#if MG_ENABLE_EPOLL + if ((mgr->epoll_fd = epoll_create1(0)) < 0) MG_ERROR(("epoll: %d", errno)); +#else + mgr->epoll_fd = -1; +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + // clang-format off + { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } + // clang-format on +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + mgr->ss = FreeRTOS_CreateSocketSet(); +#elif defined(__unix) || defined(__unix__) || defined(__APPLE__) + // Ignore SIGPIPE signal, so if client cancels the request, it + // won't kill the whole process. + signal(SIGPIPE, SIG_IGN); +#endif + mgr->dnstimeout = 3000; + mgr->dns4.url = "udp://8.8.8.8:53"; + mgr->dns6.url = "udp://[2001:4860:4860::8888]:53"; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/rpc.c" +#endif + + +void mg_rpc_add(struct mg_rpc **head, struct mg_str method, + void (*fn)(struct mg_rpc_req *), void *fn_data) { + struct mg_rpc *rpc = (struct mg_rpc *) calloc(1, sizeof(*rpc)); + if (rpc != NULL) { + rpc->method = mg_strdup(method), rpc->fn = fn, rpc->fn_data = fn_data; + rpc->next = *head, *head = rpc; + } +} + +void mg_rpc_del(struct mg_rpc **head, void (*fn)(struct mg_rpc_req *)) { + struct mg_rpc *r; + while ((r = *head) != NULL) { + if (r->fn == fn || fn == NULL) { + *head = r->next; + free((void *) r->method.ptr); + free(r); + } else { + head = &(*head)->next; + } + } +} + +static void mg_rpc_call(struct mg_rpc_req *r, struct mg_str method) { + struct mg_rpc *h = r->head == NULL ? NULL : *r->head; + while (h != NULL && !mg_match(method, h->method, NULL)) h = h->next; + if (h != NULL) { + r->rpc = h; + h->fn(r); + } else { + mg_rpc_err(r, -32601, "\"%.*s not found\"", (int) method.len, method.ptr); + } +} + +void mg_rpc_process(struct mg_rpc_req *r) { + int len, off = mg_json_get(r->frame, "$.method", &len); + if (off > 0 && r->frame.ptr[off] == '"') { + struct mg_str method = mg_str_n(&r->frame.ptr[off + 1], (size_t) len - 2); + mg_rpc_call(r, method); + } else if ((off = mg_json_get(r->frame, "$.result", &len)) > 0 || + (off = mg_json_get(r->frame, "$.error", &len)) > 0) { + mg_rpc_call(r, mg_str("")); // JSON response! call "" method handler + } else { + mg_rpc_err(r, -32700, "%.*Q", (int) r->frame.len, r->frame.ptr); // Invalid + } +} + +void mg_rpc_vok(struct mg_rpc_req *r, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "{%Q:%.*s,%Q:", "id", len, + &r->frame.ptr[off], "result"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}"); + } +} + +void mg_rpc_ok(struct mg_rpc_req *r, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_vok(r, fmt, &ap); + va_end(ap); +} + +void mg_rpc_verr(struct mg_rpc_req *r, int code, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + mg_xprintf(r->pfn, r->pfn_data, "{"); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "%Q:%.*s,", "id", len, &r->frame.ptr[off]); + } + mg_xprintf(r->pfn, r->pfn_data, "%Q:{%Q:%d,%Q:", "error", "code", code, + "message"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}}"); +} + +void mg_rpc_err(struct mg_rpc_req *r, int code, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_verr(r, code, fmt, &ap); + va_end(ap); +} + +static size_t print_methods(mg_pfn_t pfn, void *pfn_data, va_list *ap) { + struct mg_rpc *h, **head = (struct mg_rpc **) va_arg(*ap, void **); + size_t len = 0; + for (h = *head; h != NULL; h = h->next) { + len += mg_xprintf(pfn, pfn_data, "%s%.*Q", h == *head ? "" : ",", + (int) h->method.len, h->method.ptr); + } + return len; +} + +void mg_rpc_list(struct mg_rpc_req *r) { + mg_rpc_ok(r, "[%M]", print_methods, r->head); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sha1.c" +#endif +/* Copyright(c) By Steve Reid */ +/* 100% Public Domain */ + + + +union char64long16 { + unsigned char c[64]; + uint32_t l[16]; +}; + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { + if (MG_BIG_ENDIAN) { + } else { + block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | + (rol(block->l[i], 8) & 0x00FF00FF); + } + return block->l[i]; +} + +/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ +#undef blk +#undef R0 +#undef R1 +#undef R2 +#undef R3 +#undef R4 + +#define blk(i) \ + (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \ + block->l[(i + 2) & 15] ^ block->l[i & 15], \ + 1)) +#define R0(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R1(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R2(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ + w = rol(w, 30); +#define R3(v, w, x, y, z, i) \ + z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ + w = rol(w, 30); +#define R4(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ + w = rol(w, 30); + +static void mg_sha1_transform(uint32_t state[5], + const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a, b, c, d, e, 0); + R0(e, a, b, c, d, 1); + R0(d, e, a, b, c, 2); + R0(c, d, e, a, b, 3); + R0(b, c, d, e, a, 4); + R0(a, b, c, d, e, 5); + R0(e, a, b, c, d, 6); + R0(d, e, a, b, c, 7); + R0(c, d, e, a, b, 8); + R0(b, c, d, e, a, 9); + R0(a, b, c, d, e, 10); + R0(e, a, b, c, d, 11); + R0(d, e, a, b, c, 12); + R0(c, d, e, a, b, 13); + R0(b, c, d, e, a, 14); + R0(a, b, c, d, e, 15); + R1(e, a, b, c, d, 16); + R1(d, e, a, b, c, 17); + R1(c, d, e, a, b, 18); + R1(b, c, d, e, a, 19); + R2(a, b, c, d, e, 20); + R2(e, a, b, c, d, 21); + R2(d, e, a, b, c, 22); + R2(c, d, e, a, b, 23); + R2(b, c, d, e, a, 24); + R2(a, b, c, d, e, 25); + R2(e, a, b, c, d, 26); + R2(d, e, a, b, c, 27); + R2(c, d, e, a, b, 28); + R2(b, c, d, e, a, 29); + R2(a, b, c, d, e, 30); + R2(e, a, b, c, d, 31); + R2(d, e, a, b, c, 32); + R2(c, d, e, a, b, 33); + R2(b, c, d, e, a, 34); + R2(a, b, c, d, e, 35); + R2(e, a, b, c, d, 36); + R2(d, e, a, b, c, 37); + R2(c, d, e, a, b, 38); + R2(b, c, d, e, a, 39); + R3(a, b, c, d, e, 40); + R3(e, a, b, c, d, 41); + R3(d, e, a, b, c, 42); + R3(c, d, e, a, b, 43); + R3(b, c, d, e, a, 44); + R3(a, b, c, d, e, 45); + R3(e, a, b, c, d, 46); + R3(d, e, a, b, c, 47); + R3(c, d, e, a, b, 48); + R3(b, c, d, e, a, 49); + R3(a, b, c, d, e, 50); + R3(e, a, b, c, d, 51); + R3(d, e, a, b, c, 52); + R3(c, d, e, a, b, 53); + R3(b, c, d, e, a, 54); + R3(a, b, c, d, e, 55); + R3(e, a, b, c, d, 56); + R3(d, e, a, b, c, 57); + R3(c, d, e, a, b, 58); + R3(b, c, d, e, a, 59); + R4(a, b, c, d, e, 60); + R4(e, a, b, c, d, 61); + R4(d, e, a, b, c, 62); + R4(c, d, e, a, b, 63); + R4(b, c, d, e, a, 64); + R4(a, b, c, d, e, 65); + R4(e, a, b, c, d, 66); + R4(d, e, a, b, c, 67); + R4(c, d, e, a, b, 68); + R4(b, c, d, e, a, 69); + R4(a, b, c, d, e, 70); + R4(e, a, b, c, d, 71); + R4(d, e, a, b, c, 72); + R4(c, d, e, a, b, 73); + R4(b, c, d, e, a, 74); + R4(a, b, c, d, e, 75); + R4(e, a, b, c, d, 76); + R4(d, e, a, b, c, 77); + R4(c, d, e, a, b, 78); + R4(b, c, d, e, a, 79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + /* Erase working structures. The order of operations is important, + * used to ensure that compiler doesn't optimize those out. */ + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; + (void) b; + (void) c; + (void) d; + (void) e; +} + +void mg_sha1_init(mg_sha1_ctx *context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; +} + +void mg_sha1_update(mg_sha1_ctx *context, const unsigned char *data, + size_t len) { + size_t i, j; + + j = context->count[0]; + if ((context->count[0] += (uint32_t) len << 3) < j) context->count[1]++; + context->count[1] += (uint32_t) (len >> 29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64 - j)); + mg_sha1_transform(context->state, context->buffer); + for (; i + 63 < len; i += 64) { + mg_sha1_transform(context->state, &data[i]); + } + j = 0; + } else + i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} + +void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> + ((3 - (i & 3)) * 8)) & + 255); + } + c = 0200; + mg_sha1_update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + mg_sha1_update(context, &c, 1); + } + mg_sha1_update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = + (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sntp.c" +#endif + + + + + + +#define SNTP_TIME_OFFSET 2208988800U // (1970 - 1900) in seconds +#define SNTP_MAX_FRAC 4294967295.0 // 2 ** 32 - 1 + +static int64_t gettimestamp(const uint32_t *data) { + uint32_t sec = mg_ntohl(data[0]), frac = mg_ntohl(data[1]); + if (sec) sec -= SNTP_TIME_OFFSET; + return ((int64_t) sec) * 1000 + (int64_t) (frac / SNTP_MAX_FRAC * 1000.0); +} + +int64_t mg_sntp_parse(const unsigned char *buf, size_t len) { + int64_t res = -1; + int mode = len > 0 ? buf[0] & 7 : 0; + int version = len > 0 ? (buf[0] >> 3) & 7 : 0; + if (len < 48) { + MG_ERROR(("%s", "corrupt packet")); + } else if (mode != 4 && mode != 5) { + MG_ERROR(("%s", "not a server reply")); + } else if (buf[1] == 0) { + MG_ERROR(("%s", "server sent a kiss of death")); + } else if (version == 4 || version == 3) { + // int64_t ref = gettimestamp((uint32_t *) &buf[16]); + int64_t t0 = gettimestamp((uint32_t *) &buf[24]); + int64_t t1 = gettimestamp((uint32_t *) &buf[32]); + int64_t t2 = gettimestamp((uint32_t *) &buf[40]); + int64_t t3 = (int64_t) mg_millis(); + int64_t delta = (t3 - t0) - (t2 - t1); + MG_VERBOSE(("%lld %lld %lld %lld delta:%lld", t0, t1, t2, t3, delta)); + res = t2 + delta / 2; + } else { + MG_ERROR(("unexpected version: %d", version)); + } + return res; +} + +static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ) { + int64_t milliseconds = mg_sntp_parse(c->recv.buf, c->recv.len); + if (milliseconds > 0) { + MG_INFO(("%lu got time: %lld ms from epoch", c->id, milliseconds)); + mg_call(c, MG_EV_SNTP_TIME, (uint64_t *) &milliseconds); + MG_VERBOSE(("%u.%u", (unsigned) (milliseconds / 1000), + (unsigned) (milliseconds % 1000))); + } + mg_iobuf_del(&c->recv, 0, c->recv.len); // Free receive buffer + } else if (ev == MG_EV_CONNECT) { + mg_sntp_request(c); + } else if (ev == MG_EV_CLOSE) { + } + (void) fnd; + (void) evd; +} + +void mg_sntp_request(struct mg_connection *c) { + if (c->is_resolving) { + MG_ERROR(("%lu wait until resolved", c->id)); + } else { + int64_t now = (int64_t) mg_millis(); // Use int64_t, for vc98 + uint8_t buf[48] = {0}; + uint32_t *t = (uint32_t *) &buf[40]; + double frac = ((double) (now % 1000)) / 1000.0 * SNTP_MAX_FRAC; + buf[0] = (0 << 6) | (4 << 3) | 3; + t[0] = mg_htonl((uint32_t) (now / 1000) + SNTP_TIME_OFFSET); + t[1] = mg_htonl((uint32_t) frac); + mg_send(c, buf, sizeof(buf)); + } +} + +struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fnd) { + struct mg_connection *c = NULL; + if (url == NULL) url = "udp://time.google.com:123"; + if ((c = mg_connect(mgr, url, fn, fnd)) != NULL) c->pfn = sntp_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sock.c" +#endif + + + + + + + + + + +#if MG_ENABLE_SOCKET +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK +typedef unsigned long nfds_t; +#define MG_SOCK_ERRNO WSAGetLastError() +#if defined(_MSC_VER) +#pragma comment(lib, "ws2_32.lib") +#define alloca(a) _alloca(a) +#endif +#define poll(a, b, c) WSAPoll((a), (b), (c)) +#ifndef SO_EXCLUSIVEADDRUSE +#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR)) +#endif +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP +#define MG_SOCK_ERRNO errno +typedef Socket_t SOCKET; +#define INVALID_SOCKET FREERTOS_INVALID_SOCKET +#elif MG_ARCH == MG_ARCH_TIRTOS +#define MG_SOCK_ERRNO errno +#define closesocket(x) close(x) +#else +#define MG_SOCK_ERRNO errno +#ifndef closesocket +#define closesocket(x) close(x) +#endif +#define INVALID_SOCKET (-1) +typedef int SOCKET; +#endif + +#define FD(c_) ((SOCKET) (size_t) (c_)->fd) +#define S2PTR(s_) ((void *) (size_t) (s_)) + +#ifndef MSG_NONBLOCKING +#define MSG_NONBLOCKING 0 +#endif + +#ifndef AF_INET6 +#define AF_INET6 10 +#endif + +union usa { + struct sockaddr sa; + struct sockaddr_in sin; +#if MG_ENABLE_IPV6 + struct sockaddr_in6 sin6; +#endif +}; + +static socklen_t tousa(struct mg_addr *a, union usa *usa) { + socklen_t len = sizeof(usa->sin); + memset(usa, 0, sizeof(*usa)); + usa->sin.sin_family = AF_INET; + usa->sin.sin_port = a->port; + *(uint32_t *) &usa->sin.sin_addr = a->ip; +#if MG_ENABLE_IPV6 + if (a->is_ip6) { + usa->sin.sin_family = AF_INET6; + usa->sin6.sin6_port = a->port; + memcpy(&usa->sin6.sin6_addr, a->ip6, sizeof(a->ip6)); + len = sizeof(usa->sin6); + } +#endif + return len; +} + +static void tomgaddr(union usa *usa, struct mg_addr *a, bool is_ip6) { + a->is_ip6 = is_ip6; + a->port = usa->sin.sin_port; + memcpy(&a->ip, &usa->sin.sin_addr, sizeof(a->ip)); +#if MG_ENABLE_IPV6 + if (is_ip6) { + memcpy(a->ip6, &usa->sin6.sin6_addr, sizeof(a->ip6)); + a->port = usa->sin6.sin6_port; + } +#endif +} + +static bool mg_sock_would_block(void) { + int err = MG_SOCK_ERRNO; + return err == EINPROGRESS || err == EWOULDBLOCK +#ifndef WINCE + || err == EAGAIN || err == EINTR +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + || err == WSAEINTR || err == WSAEWOULDBLOCK +#endif + ; +} + +static bool mg_sock_conn_reset(void) { + int err = MG_SOCK_ERRNO; +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + return err == WSAECONNRESET; +#else + return err == EPIPE || err == ECONNRESET; +#endif +} + +static void setlocaddr(SOCKET fd, struct mg_addr *addr) { + union usa usa; + socklen_t n = sizeof(usa); + if (getsockname(fd, &usa.sa, &n) == 0) { + tomgaddr(&usa, addr, n != sizeof(usa.sin)); + } +} + +static void iolog(struct mg_connection *c, char *buf, long n, bool r) { + if (n == MG_IO_WAIT) { + // Do nothing + } else if (n <= 0) { + c->is_closing = 1; // Termination. Don't call mg_error(): #1529 + } else if (n > 0) { + if (c->is_hexdumping) { + union usa usa; + char t1[50], t2[50]; + socklen_t slen = sizeof(usa.sin); + struct mg_addr a; + memset(&usa, 0, sizeof(usa)); + memset(&a, 0, sizeof(a)); + if (getsockname(FD(c), &usa.sa, &slen) < 0) (void) 0; // Ignore result + tomgaddr(&usa, &a, c->rem.is_ip6); + MG_INFO(("\n-- %lu %s %s %s %s %ld", c->id, + mg_straddr(&a, t1, sizeof(t1)), r ? "<-" : "->", + mg_straddr(&c->rem, t2, sizeof(t2)), c->label, n)); + + mg_hexdump(buf, (size_t) n); + } + if (r) { + c->recv.len += (size_t) n; + mg_call(c, MG_EV_READ, &n); + } else { + mg_iobuf_del(&c->send, 0, (size_t) n); + // if (c->send.len == 0) mg_iobuf_resize(&c->send, 0); + if (c->send.len == 0) { + MG_EPOLL_MOD(c, 0); + } + mg_call(c, MG_EV_WRITE, &n); + } + } +} + +long mg_io_send(struct mg_connection *c, const void *buf, size_t len) { + long n; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen); + if (n > 0) setlocaddr(FD(c), &c->loc); + } else { + n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING); +#if MG_ARCH == MG_ARCH_RTX + if (n == BSD_EWOULDBLOCK) return MG_IO_WAIT; +#endif + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +bool mg_send(struct mg_connection *c, const void *buf, size_t len) { + if (c->is_udp) { + long n = mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p %d:%d %ld err %d", c->id, c->fd, (int) c->send.len, + (int) c->recv.len, n, MG_SOCK_ERRNO)); + iolog(c, (char *) buf, n, false); + return n > 0; + } else { + return mg_iobuf_add(&c->send, c->send.len, buf, len); + } +} + +static void mg_set_non_blocking_mode(SOCKET fd) { +#if defined(MG_CUSTOM_NONBLOCK) + MG_CUSTOM_NONBLOCK(fd); +#elif MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_RTX + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + const BaseType_t off = 0; + if (setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off)) != 0) (void) 0; + if (setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off)) != 0) (void) 0; +#elif MG_ARCH == MG_ARCH_FREERTOS_LWIP || MG_ARCH == MG_ARCH_RTX_LWIP + lwip_fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_AZURERTOS + fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_TIRTOS + int val = 0; + setsockopt(fd, 0, SO_BLOCKING, &val, sizeof(val)); + int status = 0; + int res = SockStatus(fd, FDSTATUS_SEND, &status); + if (res == 0 && status > 0) { + val = status / 2; + int val_size = sizeof(val); + res = SockSet(fd, SOL_SOCKET, SO_SNDLOWAT, &val, val_size); + } +#else + fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); // Non-blocking mode + fcntl(fd, F_SETFD, FD_CLOEXEC); // Set close-on-exec +#endif +} + +bool mg_open_listener(struct mg_connection *c, const char *url) { + SOCKET fd = INVALID_SOCKET; + bool success = false; + c->loc.port = mg_htons(mg_url_port(url)); + if (!mg_aton(mg_url_host(url), &c->loc)) { + MG_ERROR(("invalid listening URL: %s", url)); + } else { + union usa usa; + socklen_t slen = tousa(&c->loc, &usa); + int on = 1, af = c->loc.is_ip6 ? AF_INET6 : AF_INET; + int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM; + int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP; + (void) on; + + if ((fd = socket(af, type, proto)) == INVALID_SOCKET) { + MG_ERROR(("socket: %d", MG_SOCK_ERRNO)); +#if ((MG_ARCH == MG_ARCH_WIN32) || (MG_ARCH == MG_ARCH_UNIX) || \ + (defined(LWIP_SOCKET) && SO_REUSE == 1)) + } else if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, + sizeof(on)) != 0) { + // 1. SO_RESUSEADDR is not enabled on Windows because the semantics of + // SO_REUSEADDR on UNIX and Windows is different. On Windows, + // SO_REUSEADDR allows to bind a socket to a port without error even + // if the port is already open by another program. This is not the + // behavior SO_REUSEADDR was designed for, and leads to hard-to-track + // failure scenarios. Therefore, SO_REUSEADDR was disabled on Windows + // unless SO_EXCLUSIVEADDRUSE is supported and set on a socket. + // 2. In case of LWIP, SO_REUSEADDR should be explicitly enabled, by + // defining + // SO_REUSE (in lwipopts.h), otherwise the code below will compile + // but won't work! (setsockopt will return EINVAL) + MG_ERROR(("reuseaddr: %d", MG_SOCK_ERRNO)); +#endif +#if MG_ARCH == MG_ARCH_WIN32 && !defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE) + } else if (setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *) &on, + sizeof(on)) != 0) { + // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" + MG_ERROR(("exclusiveaddruse: %d", MG_SOCK_ERRNO)); +#endif + } else if (bind(fd, &usa.sa, slen) != 0) { + MG_ERROR(("bind: %d", MG_SOCK_ERRNO)); + } else if ((type == SOCK_STREAM && + listen(fd, MG_SOCK_LISTEN_BACKLOG_SIZE) != 0)) { + // NOTE(lsm): FreeRTOS uses backlog value as a connection limit + // In case port was set to 0, get the real port number + MG_ERROR(("listen: %d", MG_SOCK_ERRNO)); + } else { + setlocaddr(fd, &c->loc); + mg_set_non_blocking_mode(fd); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + success = true; + } + } + if (success == false && fd != INVALID_SOCKET) closesocket(fd); + return success; +} + +long mg_io_recv(struct mg_connection *c, void *buf, size_t len) { + long n = 0; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen); + if (n > 0) tomgaddr(&usa, &c->rem, slen != sizeof(usa.sin)); + } else { + n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING); + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +// NOTE(lsm): do only one iteration of reads, cause some systems +// (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data +static void read_conn(struct mg_connection *c) { + long n = -1; + if (c->recv.len >= MG_MAX_RECV_SIZE) { + mg_error(c, "max_recv_buf_size reached"); + } else if (c->recv.size <= c->recv.len && + !mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE)) { + mg_error(c, "oom"); + } else { + char *buf = (char *) &c->recv.buf[c->recv.len]; + size_t len = c->recv.size - c->recv.len; + n = c->is_tls ? mg_tls_recv(c, buf, len) : mg_io_recv(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, true); + } +} + +static void write_conn(struct mg_connection *c) { + char *buf = (char *) c->send.buf; + size_t len = c->send.len; + long n = c->is_tls ? mg_tls_send(c, buf, len) : mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, false); +} + +static void close_conn(struct mg_connection *c) { + if (FD(c) != INVALID_SOCKET) { +#if MG_ENABLE_EPOLL + epoll_ctl(c->mgr->epoll_fd, EPOLL_CTL_DEL, FD(c), NULL); +#endif + closesocket(FD(c)); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL); +#endif + } + mg_close_conn(c); +} + +static void connect_conn(struct mg_connection *c) { + union usa usa; + socklen_t n = sizeof(usa); + // Use getpeername() to test whether we have connected + if (getpeername(FD(c), &usa.sa, &n) == 0) { + c->is_connecting = 0; + mg_call(c, MG_EV_CONNECT, NULL); + MG_EPOLL_MOD(c, 0); + if (c->is_tls_hs) mg_tls_handshake(c); + } else { + mg_error(c, "socket error"); + } +} + +static void setsockopts(struct mg_connection *c) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_AZURERTOS || \ + MG_ARCH == MG_ARCH_TIRTOS + (void) c; +#else + int on = 1; +#if !defined(SOL_TCP) +#define SOL_TCP IPPROTO_TCP +#endif + if (setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) != 0) + (void) 0; + if (setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) != + 0) + (void) 0; +#endif +} + +void mg_connect_resolved(struct mg_connection *c) { + int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM; + int rc, af = c->rem.is_ip6 ? AF_INET6 : AF_INET; // c->rem has resolved IP + c->fd = S2PTR(socket(af, type, 0)); // Create outbound socket + c->is_resolving = 0; // Clear resolving flag + if (FD(c) == INVALID_SOCKET) { + mg_error(c, "socket(): %d", MG_SOCK_ERRNO); + } else if (c->is_udp) { + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + mg_call(c, MG_EV_CONNECT, NULL); + } else { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + if ((rc = connect(FD(c), &usa.sa, slen)) == 0) { + mg_call(c, MG_EV_CONNECT, NULL); + } else if (mg_sock_would_block()) { + MG_DEBUG(("%lu %p -> %x:%hu pend", c->id, c->fd, mg_ntohl(c->rem.ip), + mg_ntohs(c->rem.port))); + c->is_connecting = 1; + } else { + mg_error(c, "connect: %d", MG_SOCK_ERRNO); + } + } +} + +static SOCKET raccept(SOCKET sock, union usa *usa, socklen_t len) { + SOCKET s = INVALID_SOCKET; + do { + memset(usa, 0, sizeof(*usa)); + s = accept(sock, &usa->sa, &len); + } while (s == INVALID_SOCKET && errno == EINTR); + return s; +} + +static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) { + struct mg_connection *c = NULL; + union usa usa; + socklen_t sa_len = sizeof(usa); + SOCKET fd = raccept(FD(lsn), &usa, sa_len); + if (fd == INVALID_SOCKET) { +#if MG_ARCH == MG_ARCH_AZURERTOS + // AzureRTOS, in non-block socket mode can mark listening socket readable + // even it is not. See comment for 'select' func implementation in + // nx_bsd.c That's not an error, just should try later + if (MG_SOCK_ERRNO != EAGAIN) +#endif + MG_ERROR(("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO)); +#if (MG_ARCH != MG_ARCH_WIN32) && (MG_ARCH != MG_ARCH_FREERTOS_TCP) && \ + (MG_ARCH != MG_ARCH_TIRTOS) && !(MG_ENABLE_POLL) + } else if ((long) fd >= FD_SETSIZE) { + MG_ERROR(("%ld > %ld", (long) fd, (long) FD_SETSIZE)); + closesocket(fd); +#endif + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("%lu OOM", lsn->id)); + closesocket(fd); + } else { + // char buf[40]; + tomgaddr(&usa, &c->rem, sa_len != sizeof(usa.sin)); + // mg_straddr(&c->rem, buf, sizeof(buf)); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + c->is_accepted = 1; + c->is_hexdumping = lsn->is_hexdumping; + c->loc = lsn->loc; + c->pfn = lsn->pfn; + c->pfn_data = lsn->pfn_data; + c->fn = lsn->fn; + c->fn_data = lsn->fn_data; + MG_DEBUG(("%lu %p accepted %x.%hu -> %x.%hu", c->id, c->fd, + mg_ntohl(c->rem.ip), mg_ntohs(c->rem.port), mg_ntohl(c->loc.ip), + mg_ntohs(c->loc.port))); + mg_call(c, MG_EV_OPEN, NULL); + mg_call(c, MG_EV_ACCEPT, NULL); + } +} + +static bool mg_socketpair(SOCKET sp[2], union usa usa[2], bool udp) { + SOCKET sock; + socklen_t n = sizeof(usa[0].sin); + bool success = false; + + sock = sp[0] = sp[1] = INVALID_SOCKET; + (void) memset(&usa[0], 0, sizeof(usa[0])); + usa[0].sin.sin_family = AF_INET; + *(uint32_t *) &usa->sin.sin_addr = mg_htonl(0x7f000001U); // 127.0.0.1 + usa[1] = usa[0]; + + if (udp && (sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + (sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + bind(sp[0], &usa[0].sa, n) == 0 && bind(sp[1], &usa[1].sa, n) == 0 && + getsockname(sp[0], &usa[0].sa, &n) == 0 && + getsockname(sp[1], &usa[1].sa, &n) == 0 && + connect(sp[0], &usa[1].sa, n) == 0 && + connect(sp[1], &usa[0].sa, n) == 0) { + success = true; + } else if (!udp && + (sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + bind(sock, &usa[0].sa, n) == 0 && + listen(sock, MG_SOCK_LISTEN_BACKLOG_SIZE) == 0 && + getsockname(sock, &usa[0].sa, &n) == 0 && + (sp[0] = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + connect(sp[0], &usa[0].sa, n) == 0 && + (sp[1] = raccept(sock, &usa[1], n)) != INVALID_SOCKET) { + success = true; + } + if (success) { + mg_set_non_blocking_mode(sp[1]); + } else { + if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); + if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } + if (sock != INVALID_SOCKET) closesocket(sock); + return success; +} + +int mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn, void *fn_data, + bool udp) { + union usa usa[2]; + SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET}; + struct mg_connection *c = NULL; + if (!mg_socketpair(sp, usa, udp)) { + MG_ERROR(("Cannot create socket pair")); + } else if ((c = mg_wrapfd(mgr, (int) sp[1], fn, fn_data)) == NULL) { + closesocket(sp[0]); + closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } else { + tomgaddr(&usa[0], &c->rem, false); + MG_DEBUG(("%lu %p pipe %lu", c->id, c->fd, (unsigned long) sp[0])); + } + return (int) sp[0]; +} + +static bool can_read(const struct mg_connection *c) { + return c->is_full == false; +} + +static bool can_write(const struct mg_connection *c) { + return c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0); +} + +static bool skip_iotest(const struct mg_connection *c) { + return (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) || + (can_read(c) == false && can_write(c) == false); +} + +static void mg_iotest(struct mg_mgr *mgr, int ms) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + struct mg_connection *c; + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + if (can_read(c)) + FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_READ | eSELECT_EXCEPT); + if (can_write(c)) FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_WRITE); + } + FreeRTOS_select(mgr->ss, pdMS_TO_TICKS(ms)); + for (c = mgr->conns; c != NULL; c = c->next) { + EventBits_t bits = FreeRTOS_FD_ISSET(c->fd, mgr->ss); + c->is_readable = bits & (eSELECT_READ | eSELECT_EXCEPT) ? 1 : 0; + c->is_writable = bits & eSELECT_WRITE ? 1 : 0; + FreeRTOS_FD_CLR(c->fd, mgr->ss, + eSELECT_READ | eSELECT_EXCEPT | eSELECT_WRITE); + } +#elif MG_ENABLE_EPOLL + size_t max = 1; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (mg_tls_pending(c) > 0) ms = 1, c->is_readable = 1; + if (can_write(c)) MG_EPOLL_MOD(c, 1); + max++; + } + struct epoll_event *evs = (struct epoll_event *) alloca(max * sizeof(evs[0])); + int n = epoll_wait(mgr->epoll_fd, evs, (int) max, ms); + for (int i = 0; i < n; i++) { + struct mg_connection *c = (struct mg_connection *) evs[i].data.ptr; + if (evs[i].events & EPOLLERR) { + mg_error(c, "socket error"); + } else if (c->is_readable == 0) { + bool rd = evs[i].events & (EPOLLIN | EPOLLHUP); + bool wr = evs[i].events & EPOLLOUT; + c->is_readable = can_read(c) && rd ? 1U : 0; + c->is_writable = can_write(c) && wr ? 1U : 0; + } + } + (void) skip_iotest; +#elif MG_ENABLE_POLL + nfds_t n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) n++; + struct pollfd *fds = (struct pollfd *) alloca(n * sizeof(fds[0])); + memset(fds, 0, n * sizeof(fds[0])); + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + ms = 1; // Don't wait if TLS is ready + } else { + fds[n].fd = FD(c); + if (can_read(c)) fds[n].events |= POLLIN; + if (can_write(c)) fds[n].events |= POLLOUT; + n++; + } + } + + // MG_INFO(("poll n=%d ms=%d", (int) n, ms)); + if (poll(fds, n, ms) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (n == 0) Sleep(ms); // On Windows, poll fails if no sockets +#endif + memset(fds, 0, n * sizeof(fds[0])); + } + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + c->is_readable = 1; + } else { + if (fds[n].revents & POLLERR) { + mg_error(c, "socket error"); + } else { + c->is_readable = + (unsigned) (fds[n].revents & (POLLIN | POLLHUP) ? 1 : 0); + c->is_writable = (unsigned) (fds[n].revents & POLLOUT ? 1 : 0); + } + n++; + } + } +#else + struct timeval tv = {ms / 1000, (ms % 1000) * 1000}, tv_zero = {0, 0}; + struct mg_connection *c; + fd_set rset, wset, eset; + SOCKET maxfd = 0; + int rc; + + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + FD_SET(FD(c), &eset); + if (can_read(c)) FD_SET(FD(c), &rset); + if (can_write(c)) FD_SET(FD(c), &wset); + if (mg_tls_pending(c) > 0) tv = tv_zero; + if (FD(c) > maxfd) maxfd = FD(c); + } + + if ((rc = select((int) maxfd + 1, &rset, &wset, &eset, &tv)) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (maxfd == 0) Sleep(ms); // On Windows, select fails if no sockets +#else + MG_ERROR(("select: %d %d", rc, MG_SOCK_ERRNO)); +#endif + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + } + + for (c = mgr->conns; c != NULL; c = c->next) { + if (FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &eset)) { + mg_error(c, "socket error"); + } else { + c->is_readable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset); + c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset); + if (mg_tls_pending(c) > 0) c->is_readable = 1; + } + } +#endif +} + +void mg_mgr_poll(struct mg_mgr *mgr, int ms) { + struct mg_connection *c, *tmp; + uint64_t now; + + mg_iotest(mgr, ms); + now = mg_millis(); + mg_timer_poll(&mgr->timers, now); + + for (c = mgr->conns; c != NULL; c = tmp) { + bool is_resp = c->is_resp; + tmp = c->next; + mg_call(c, MG_EV_POLL, &now); + if (is_resp && !c->is_resp) { + long n = 0; + mg_call(c, MG_EV_READ, &n); + } + MG_VERBOSE(("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-', + c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't', + c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h', + c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c')); + if (c->is_resolving || c->is_closing) { + // Do nothing + } else if (c->is_listening && c->is_udp == 0) { + if (c->is_readable) accept_conn(mgr, c); + } else if (c->is_connecting) { + if (c->is_readable || c->is_writable) connect_conn(c); + } else if (c->is_tls_hs) { + if ((c->is_readable || c->is_writable)) mg_tls_handshake(c); + } else { + if (c->is_readable) read_conn(c); + if (c->is_writable) write_conn(c); + } + + if (c->is_draining && c->send.len == 0) c->is_closing = 1; + if (c->is_closing) close_conn(c); + } +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/ssi.c" +#endif + + + + +#ifndef MG_MAX_SSI_DEPTH +#define MG_MAX_SSI_DEPTH 5 +#endif + +#ifndef MG_SSI_BUFSIZ +#define MG_SSI_BUFSIZ 1024 +#endif + +#if MG_ENABLE_SSI +static char *mg_ssi(const char *path, const char *root, int depth) { + struct mg_iobuf b = {NULL, 0, 0, MG_IO_SIZE}; + FILE *fp = fopen(path, "rb"); + if (fp != NULL) { + char buf[MG_SSI_BUFSIZ], arg[sizeof(buf)]; + int ch, intag = 0; + size_t len = 0; + buf[0] = arg[0] = '\0'; + while ((ch = fgetc(fp)) != EOF) { + if (intag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') { + buf[len++] = (char) (ch & 0xff); + buf[len] = '\0'; + if (sscanf(buf, " [%s]", to)); + } + if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term + return i; +} + +static size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs, + char *dst, size_t dstlen) { + return mg_dns_parse_name_depth(s, n, ofs, dst, dstlen, 0, 0); +} + +size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs, + bool is_question, struct mg_dns_rr *rr) { + const uint8_t *s = buf + ofs, *e = &buf[len]; + + memset(rr, 0, sizeof(*rr)); + if (len < sizeof(struct mg_dns_header)) return 0; // Too small + if (len > 512) return 0; // Too large, we don't expect that + if (s >= e) return 0; // Overflow + + if ((rr->nlen = (uint16_t) mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0) + return 0; + s += rr->nlen + 4; + if (s > e) return 0; + rr->atype = (uint16_t) (((uint16_t) s[-4] << 8) | s[-3]); + rr->aclass = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (is_question) return (size_t) (rr->nlen + 4); + + s += 6; + if (s > e) return 0; + rr->alen = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]); + if (s + rr->alen > e) return 0; + return (size_t) (rr->nlen + rr->alen + 10); +} + +bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) { + const struct mg_dns_header *h = (struct mg_dns_header *) buf; + struct mg_dns_rr rr; + size_t i, n, ofs = sizeof(*h); + memset(dm, 0, sizeof(*dm)); + + if (len < sizeof(*h)) return 0; // Too small, headers dont fit + if (mg_ntohs(h->num_questions) > 1) return 0; // Sanity + if (mg_ntohs(h->num_answers) > 10) return 0; // Sanity + dm->txnid = mg_ntohs(h->txnid); + + for (i = 0; i < mg_ntohs(h->num_questions); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, true, &rr)) == 0) return false; + // MG_INFO(("Q %lu %lu %hu/%hu", ofs, n, rr.atype, rr.aclass)); + ofs += n; + } + for (i = 0; i < mg_ntohs(h->num_answers); i++) { + if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false; + // MG_INFO(("A -- %lu %lu %hu/%hu %s", ofs, n, rr.atype, rr.aclass, + // dm->name)); + mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name)); + ofs += n; + + if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) { + dm->addr.is_ip6 = false; + memcpy(&dm->addr.ip, &buf[ofs - 4], 4); + dm->resolved = true; + break; // Return success + } else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) { + dm->addr.is_ip6 = true; + memcpy(&dm->addr.ip6, &buf[ofs - 16], 16); + dm->resolved = true; + break; // Return success + } + } + return true; +} + +static void dns_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + struct dns_data *d, *tmp; + if (ev == MG_EV_POLL) { + uint64_t now = *(uint64_t *) ev_data; + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_DEBUG ("%lu %lu dns poll", d->expire, now)); + if (now > d->expire) mg_error(d->c, "DNS timeout"); + } + } else if (ev == MG_EV_READ) { + struct mg_dns_message dm; + int resolved = 0; + if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) { + MG_ERROR(("Unexpected DNS response:")); + mg_hexdump(c->recv.buf, c->recv.len); + } else { + // MG_VERBOSE(("%s %d", dm.name, dm.resolved)); + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + // MG_INFO(("d %p %hu %hu", d, d->txnid, dm.txnid)); + if (dm.txnid != d->txnid) continue; + if (d->c->is_resolving) { + if (dm.resolved) { + char buf[100]; + dm.addr.port = d->c->rem.port; // Save port + d->c->rem = dm.addr; // Copy resolved address + MG_DEBUG(("%lu %s is %s", d->c->id, dm.name, + mg_ntoa(&d->c->rem, buf, sizeof(buf)))); + mg_connect_resolved(d->c); +#if MG_ENABLE_IPV6 + } else if (dm.addr.is_ip6 == false && dm.name[0] != '\0' && + c->mgr->use_dns6 == false) { + struct mg_str x = mg_str(dm.name); + mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true); +#endif + } else { + mg_error(d->c, "%s DNS lookup failed", dm.name); + } + } else { + MG_ERROR(("%lu already resolved", d->c->id)); + } + mg_dns_free(c, d); + resolved = 1; + } + } + if (!resolved) MG_ERROR(("stray DNS reply")); + c->recv.len = 0; + } else if (ev == MG_EV_CLOSE) { + for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL; + d = tmp) { + tmp = d->next; + mg_error(d->c, "DNS error"); + mg_dns_free(c, d); + } + } + (void) fn_data; +} + +static bool mg_dns_send(struct mg_connection *c, const struct mg_str *name, + uint16_t txnid, bool ipv6) { + struct { + struct mg_dns_header header; + uint8_t data[256]; + } pkt; + size_t i, n; + memset(&pkt, 0, sizeof(pkt)); + pkt.header.txnid = mg_htons(txnid); + pkt.header.flags = mg_htons(0x100); + pkt.header.num_questions = mg_htons(1); + for (i = n = 0; i < sizeof(pkt.data) - 5; i++) { + if (name->ptr[i] == '.' || i >= name->len) { + pkt.data[n] = (uint8_t) (i - n); + memcpy(&pkt.data[n + 1], name->ptr + n, i - n); + n = i + 1; + } + if (i >= name->len) break; + } + memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5); // A query + n += 5; + if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query + // memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query + // n += 6; + return mg_send(c, &pkt, sizeof(pkt.header) + n); +} + +static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms, + struct mg_dns *dnsc, bool ipv6) { + struct dns_data *d = NULL; + if (dnsc->url == NULL) { + mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()"); + } else if (dnsc->c == NULL) { + dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL); + if (dnsc->c != NULL) { + dnsc->c->pfn = dns_cb; + // dnsc->c->is_hexdumping = 1; + } + } + if (dnsc->c == NULL) { + mg_error(c, "resolver"); + } else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) { + mg_error(c, "resolve OOM"); + } else { + struct dns_data *reqs = (struct dns_data *) c->mgr->active_dns_requests; + char buf[100]; + d->txnid = reqs ? (uint16_t) (reqs->txnid + 1) : 1; + d->next = (struct dns_data *) c->mgr->active_dns_requests; + c->mgr->active_dns_requests = d; + d->expire = mg_millis() + (uint64_t) ms; + d->c = c; + c->is_resolving = 1; + MG_VERBOSE(("%lu resolving %.*s @ %s, txnid %hu", c->id, (int) name->len, + name->ptr, mg_ntoa(&dnsc->c->rem, buf, sizeof(buf)), d->txnid)); + if (!mg_dns_send(dnsc->c, name, d->txnid, ipv6)) { + mg_error(dnsc->c, "DNS send"); + } + } +} + +void mg_resolve(struct mg_connection *c, const char *url) { + struct mg_str host = mg_url_host(url); + c->rem.port = mg_htons(mg_url_port(url)); + if (mg_aton(host, &c->rem)) { + // host is an IP address, do not fire name resolution + mg_connect_resolved(c); + } else { + // host is not an IP, send DNS resolution request + struct mg_dns *dns = c->mgr->use_dns6 ? &c->mgr->dns6 : &c->mgr->dns4; + mg_sendnsreq(c, &host, c->mgr->dnstimeout, dns, c->mgr->use_dns6); + } +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/event.c" +#endif + + + + + +void mg_call(struct mg_connection *c, int ev, void *ev_data) { + // Run user-defined handler first, in order to give it an ability + // to intercept processing (e.g. clean input buffer) before the + // protocol handler kicks in + if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data); + if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data); +} + +void mg_error(struct mg_connection *c, const char *fmt, ...) { + char buf[64]; + va_list ap; + va_start(ap, fmt); + mg_vsnprintf(buf, sizeof(buf), fmt, &ap); + va_end(ap); + MG_ERROR(("%lu %p %s", c->id, c->fd, buf)); + c->is_closing = 1; // Set is_closing before sending MG_EV_CALL + mg_call(c, MG_EV_ERROR, buf); // Let user handler to override it +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fmt.c" +#endif + + + +static void mg_pfn_iobuf_private(char ch, void *param, bool expand) { + struct mg_iobuf *io = (struct mg_iobuf *) param; + if (expand && io->len + 2 > io->size) mg_iobuf_resize(io, io->len + 2); + if (io->len + 2 <= io->size) { + io->buf[io->len++] = (uint8_t) ch; + io->buf[io->len] = 0; + } else if (io->len < io->size) { + io->buf[io->len++] = 0; // Guarantee to 0-terminate + } +} + +static void mg_putchar_iobuf_static(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, false); +} + +void mg_pfn_iobuf(char ch, void *param) { + mg_pfn_iobuf_private(ch, param, true); +} + +size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list *ap) { + struct mg_iobuf io = {(uint8_t *) buf, len, 0, 0}; + size_t n = mg_vxprintf(mg_putchar_iobuf_static, &io, fmt, ap); + if (n < len) buf[n] = '\0'; + return n; +} + +size_t mg_snprintf(char *buf, size_t len, const char *fmt, ...) { + va_list ap; + size_t n; + va_start(ap, fmt); + n = mg_vsnprintf(buf, len, fmt, &ap); + va_end(ap); + return n; +} + +char *mg_vmprintf(const char *fmt, va_list *ap) { + struct mg_iobuf io = {0, 0, 0, 256}; + mg_vxprintf(mg_pfn_iobuf, &io, fmt, ap); + return (char *) io.buf; +} + +char *mg_mprintf(const char *fmt, ...) { + char *s; + va_list ap; + va_start(ap, fmt); + s = mg_vmprintf(fmt, &ap); + va_end(ap); + return s; +} + +size_t mg_xprintf(void (*out)(char, void *), void *ptr, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vxprintf(out, ptr, fmt, &ap); + va_end(ap); + return len; +} + +static bool is_digit(int c) { + return c >= '0' && c <= '9'; +} + +static int addexp(char *buf, int e, int sign) { + int n = 0; + buf[n++] = 'e'; + buf[n++] = (char) sign; + if (e > 400) return 0; + if (e < 10) buf[n++] = '0'; + if (e >= 100) buf[n++] = (char) (e / 100 + '0'), e -= 100 * (e / 100); + if (e >= 10) buf[n++] = (char) (e / 10 + '0'), e -= 10 * (e / 10); + buf[n++] = (char) (e + '0'); + return n; +} + +static int xisinf(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) == 0x7ff00000 && + ((unsigned) ieee754.u == 0); +} + +static int xisnan(double x) { + union { + double f; + uint64_t u; + } ieee754 = {x}; + return ((unsigned) (ieee754.u >> 32) & 0x7fffffff) + + ((unsigned) ieee754.u != 0) > + 0x7ff00000; +} + +static size_t mg_dtoa(char *dst, size_t dstlen, double d, int width) { + char buf[40]; + int i, s = 0, n = 0, e = 0; + double t, mul, saved; + if (d == 0.0) return mg_snprintf(dst, dstlen, "%s", "0"); + if (xisinf(d)) return mg_snprintf(dst, dstlen, "%s", d > 0 ? "inf" : "-inf"); + if (xisnan(d)) return mg_snprintf(dst, dstlen, "%s", "nan"); + if (d < 0.0) d = -d, buf[s++] = '-'; + + // Round + saved = d; + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0; + while (d <= 1.0 && d / mul <= 1.0) mul /= 10.0; + for (i = 0, t = mul * 5; i < width; i++) t /= 10.0; + d += t; + // Calculate exponent, and 'mul' for scientific representation + mul = 1.0; + while (d >= 10.0 && d / mul >= 10.0) mul *= 10.0, e++; + while (d < 1.0 && d / mul < 1.0) mul /= 10.0, e--; + // printf(" --> %g %d %g %g\n", saved, e, t, mul); + + if (e >= width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / t, e, n, buf); + n += addexp(buf + s + n, e, '+'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else if (e <= -width) { + n = (int) mg_dtoa(buf, sizeof(buf), saved / mul, width); + // printf(" --> %.*g %d [%.*s]\n", 10, d / mul, e, n, buf); + n += addexp(buf + s + n, -e, '-'); + return mg_snprintf(dst, dstlen, "%.*s", n, buf); + } else { + for (i = 0, t = mul; t >= 1.0 && s + n < (int) sizeof(buf); i++) { + int ch = (int) (d / t); + if (n > 0 || ch > 0) buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + // printf(" --> [%g] -> %g %g (%d) [%.*s]\n", saved, d, t, n, s + n, buf); + if (n == 0) buf[s++] = '0'; + while (t >= 1.0 && n + s < (int) sizeof(buf)) buf[n++] = '0', t /= 10.0; + if (s + n < (int) sizeof(buf)) buf[n + s++] = '.'; + // printf(" 1--> [%g] -> [%.*s]\n", saved, s + n, buf); + for (i = 0, t = 0.1; s + n < (int) sizeof(buf) && n < width; i++) { + int ch = (int) (d / t); + buf[s + n++] = (char) (ch + '0'); + d -= ch * t; + t /= 10.0; + } + } + while (n > 0 && buf[s + n - 1] == '0') n--; // Trim trailing zeros + if (n > 0 && buf[s + n - 1] == '.') n--; // Trim trailing dot + n += s; + if (n >= (int) sizeof(buf)) n = (int) sizeof(buf) - 1; + buf[n] = '\0'; + return mg_snprintf(dst, dstlen, "%s", buf); +} + +static size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex) { + const char *letters = "0123456789abcdef"; + uint64_t v = (uint64_t) val; + size_t s = 0, n, i; + if (is_signed && val < 0) buf[s++] = '-', v = (uint64_t) (-val); + // This loop prints a number in reverse order. I guess this is because we + // write numbers from right to left: least significant digit comes last. + // Maybe because we use Arabic numbers, and Arabs write RTL? + if (is_hex) { + for (n = 0; v; v >>= 4) buf[s + n++] = letters[v & 15]; + } else { + for (n = 0; v; v /= 10) buf[s + n++] = letters[v % 10]; + } + // Reverse a string + for (i = 0; i < n / 2; i++) { + char t = buf[s + i]; + buf[s + i] = buf[s + n - i - 1], buf[s + n - i - 1] = t; + } + if (val == 0) buf[n++] = '0'; // Handle special case + return n + s; +} + +static size_t scpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0; + while (i < len && buf[i] != '\0') out(buf[i++], ptr); + return i; +} + +static char mg_esc(int c, bool esc) { + const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\""; + for (p = esc ? esc1 : esc2; *p != '\0'; p++) { + if (*p == c) return esc ? esc2[p - esc1] : esc1[p - esc2]; + } + return 0; +} + +static char mg_escape(int c) { + return mg_esc(c, true); +} + +static size_t qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t i = 0, extra = 0; + for (i = 0; i < len && buf[i] != '\0'; i++) { + char c = mg_escape(buf[i]); + if (c) { + out('\\', ptr), out(c, ptr), extra++; + } else { + out(buf[i], ptr); + } + } + return i + extra; +} + +static size_t Qcpy(void (*out)(char, void *), void *ptr, char *buf, + size_t len) { + size_t n = 2; + out('"', ptr); + n += qcpy(out, ptr, buf, len); + out('"', ptr); + return n; +} + +static size_t bcpy(void (*out)(char, void *), void *ptr, uint8_t *buf, + size_t len) { + size_t i, n = 0; + const char *t = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + out('"', ptr), n++; + for (i = 0; i < len; i += 3) { + uint8_t c1 = buf[i], c2 = i + 1 < len ? buf[i + 1] : 0, + c3 = i + 2 < len ? buf[i + 2] : 0; + char tmp[4] = {t[c1 >> 2], t[(c1 & 3) << 4 | (c2 >> 4)], '=', '='}; + if (i + 1 < len) tmp[2] = t[(c2 & 15) << 2 | (c3 >> 6)]; + if (i + 2 < len) tmp[3] = t[c3 & 63]; + n += scpy(out, ptr, tmp, sizeof(tmp)); + } + out('"', ptr), n++; + return n; +} + +size_t mg_vxprintf(void (*out)(char, void *), void *param, const char *fmt, + va_list *ap) { + size_t i = 0, n = 0; + while (fmt[i] != '\0') { + if (fmt[i] == '%') { + size_t j, k, x = 0, is_long = 0, w = 0 /* width */, pr = ~0U /* prec */; + char pad = ' ', minus = 0, c = fmt[++i]; + if (c == '#') x++, c = fmt[++i]; + if (c == '-') minus++, c = fmt[++i]; + if (c == '0') pad = '0', c = fmt[++i]; + while (is_digit(c)) w *= 10, w += (size_t) (c - '0'), c = fmt[++i]; + if (c == '.') { + c = fmt[++i]; + if (c == '*') { + pr = (size_t) va_arg(*ap, int); + c = fmt[++i]; + } else { + pr = 0; + while (is_digit(c)) pr *= 10, pr += (size_t) (c - '0'), c = fmt[++i]; + } + } + while (c == 'h') c = fmt[++i]; // Treat h and hh as int + if (c == 'l') { + is_long++, c = fmt[++i]; + if (c == 'l') is_long++, c = fmt[++i]; + } + if (c == 'p') x = 1, is_long = 1; + if (c == 'd' || c == 'u' || c == 'x' || c == 'X' || c == 'p' || + c == 'g' || c == 'f') { + bool s = (c == 'd'), h = (c == 'x' || c == 'X' || c == 'p'); + char tmp[40]; + size_t xl = x ? 2 : 0; + if (c == 'g' || c == 'f') { + double v = va_arg(*ap, double); + if (pr == ~0U) pr = 6; + k = mg_dtoa(tmp, sizeof(tmp), v, (int) pr); + } else if (is_long == 2) { + int64_t v = va_arg(*ap, int64_t); + k = mg_lld(tmp, v, s, h); + } else if (is_long == 1) { + long v = va_arg(*ap, long); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned long) v, s, h); + } else { + int v = va_arg(*ap, int); + k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned) v, s, h); + } + for (j = 0; j < xl && w > 0; j++) w--; + for (j = 0; pad == ' ' && !minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, (char *) "0x", xl); + for (j = 0; pad == '0' && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + n += scpy(out, param, tmp, k); + for (j = 0; pad == ' ' && minus && k < w && j + k < w; j++) + n += scpy(out, param, &pad, 1); + } else if (c == 'M') { + mg_pm_t f = va_arg(*ap, mg_pm_t); + n += f(out, param, ap); + } else if (c == 'c') { + int ch = va_arg(*ap, int); + out((char) ch, param); + n++; + } else if (c == 'H') { + // Print hex-encoded double-quoted string + size_t bl = (size_t) va_arg(*ap, int); + uint8_t *p = va_arg(*ap, uint8_t *), dquote = '"'; + const char *hex = "0123456789abcdef"; + n += scpy(out, param, (char *) &dquote, 1); + for (j = 0; j < bl; j++) { + n += scpy(out, param, (char *) &hex[(p[j] >> 4) & 15], 1); + n += scpy(out, param, (char *) &hex[p[j] & 15], 1); + } + n += scpy(out, param, (char *) &dquote, 1); + } else if (c == 'V') { + // Print base64-encoded double-quoted string + size_t len = (size_t) va_arg(*ap, int); + uint8_t *buf = va_arg(*ap, uint8_t *); + n += bcpy(out, param, buf, len); + } else if (c == 's' || c == 'Q' || c == 'q') { + char *p = va_arg(*ap, char *); + size_t (*f)(void (*)(char, void *), void *, char *, size_t) = scpy; + if (c == 'Q') f = Qcpy; + if (c == 'q') f = qcpy; + if (pr == ~0U) pr = p == NULL ? 0 : strlen(p); + for (j = 0; !minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + n += f(out, param, p, pr); + for (j = 0; minus && pr < w && j + pr < w; j++) + n += f(out, param, &pad, 1); + } else if (c == '%') { + out('%', param); + n++; + } else { + out('%', param); + out(c, param); + n += 2; + } + i++; + } else { + out(fmt[i], param), n++, i++; + } + } + return n; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs.c" +#endif + + + +struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags) { + struct mg_fd *fd = (struct mg_fd *) calloc(1, sizeof(*fd)); + if (fd != NULL) { + fd->fd = fs->op(path, flags); + fd->fs = fs; + if (fd->fd == NULL) { + free(fd); + fd = NULL; + } + } + return fd; +} + +void mg_fs_close(struct mg_fd *fd) { + if (fd != NULL) { + fd->fs->cl(fd->fd); + free(fd); + } +} + +char *mg_file_read(struct mg_fs *fs, const char *path, size_t *sizep) { + struct mg_fd *fd; + char *data = NULL; + size_t size = 0; + fs->st(path, &size, NULL); + if ((fd = mg_fs_open(fs, path, MG_FS_READ)) != NULL) { + data = (char *) calloc(1, size + 1); + if (data != NULL) { + if (fs->rd(fd->fd, data, size) != size) { + free(data); + data = NULL; + } else { + data[size] = '\0'; + if (sizep != NULL) *sizep = size; + } + } + mg_fs_close(fd); + } + return data; +} + +bool mg_file_write(struct mg_fs *fs, const char *path, const void *buf, + size_t len) { + bool result = false; + struct mg_fd *fd; + char tmp[MG_PATH_MAX]; + mg_snprintf(tmp, sizeof(tmp), "%s..%d", path, rand()); + if ((fd = mg_fs_open(fs, tmp, MG_FS_WRITE)) != NULL) { + result = fs->wr(fd->fd, buf, len) == len; + mg_fs_close(fd); + if (result) { + fs->rm(path); + fs->mv(tmp, path); + } else { + fs->rm(tmp); + } + } + return result; +} + +bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...) { + va_list ap; + char *data; + bool result = false; + va_start(ap, fmt); + data = mg_vmprintf(fmt, &ap); + va_end(ap); + result = mg_file_write(fs, path, data, strlen(data)); + free(data); + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_fat.c" +#endif + + + +#if MG_ENABLE_FATFS +#include + +static int mg_days_from_epoch(int y, int m, int d) { + y -= m <= 2; + int era = y / 400; + int yoe = y - era * 400; + int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1; + int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy; + return era * 146097 + doe - 719468; +} + +static time_t mg_timegm(const struct tm *t) { + int year = t->tm_year + 1900; + int month = t->tm_mon; // 0-11 + if (month > 11) { + year += month / 12; + month %= 12; + } else if (month < 0) { + int years_diff = (11 - month) / 12; + year -= years_diff; + month += 12 * years_diff; + } + int x = mg_days_from_epoch(year, month + 1, t->tm_mday); + return 60 * (60 * (24L * x + t->tm_hour) + t->tm_min) + t->tm_sec; +} + +static time_t ff_time_to_epoch(uint16_t fdate, uint16_t ftime) { + struct tm tm; + memset(&tm, 0, sizeof(struct tm)); + tm.tm_sec = (ftime << 1) & 0x3e; + tm.tm_min = ((ftime >> 5) & 0x3f); + tm.tm_hour = ((ftime >> 11) & 0x1f); + tm.tm_mday = (fdate & 0x1f); + tm.tm_mon = ((fdate >> 5) & 0x0f) - 1; + tm.tm_year = ((fdate >> 9) & 0x7f) + 80; + return mg_timegm(&tm); +} + +static int ff_stat(const char *path, size_t *size, time_t *mtime) { + FILINFO fi; + if (path[0] == '\0') { + if (size) *size = 0; + if (mtime) *mtime = 0; + return MG_FS_DIR; + } else if (f_stat(path, &fi) == 0) { + if (size) *size = (size_t) fi.fsize; + if (mtime) *mtime = ff_time_to_epoch(fi.fdate, fi.ftime); + return MG_FS_READ | MG_FS_WRITE | ((fi.fattrib & AM_DIR) ? MG_FS_DIR : 0); + } else { + return 0; + } +} + +static void ff_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + DIR d; + FILINFO fi; + if (f_opendir(&d, dir) == FR_OK) { + while (f_readdir(&d, &fi) == FR_OK && fi.fname[0] != '\0') { + if (!strcmp(fi.fname, ".") || !strcmp(fi.fname, "..")) continue; + fn(fi.fname, userdata); + } + f_closedir(&d); + } +} + +static void *ff_open(const char *path, int flags) { + FIL f; + unsigned char mode = FA_READ; + if (flags & MG_FS_WRITE) mode |= FA_WRITE | FA_OPEN_ALWAYS | FA_OPEN_APPEND; + if (f_open(&f, path, mode) == 0) { + FIL *fp = calloc(1, sizeof(*fp)); + memcpy(fp, &f, sizeof(*fp)); + return fp; + } else { + return NULL; + } +} + +static void ff_close(void *fp) { + if (fp != NULL) { + f_close((FIL *) fp); + free(fp); + } +} + +static size_t ff_read(void *fp, void *buf, size_t len) { + UINT n = 0, misalign = ((size_t) buf) & 3; + if (misalign) { + char aligned[4]; + f_read((FIL *) fp, aligned, len > misalign ? misalign : len, &n); + memcpy(buf, aligned, n); + } else { + f_read((FIL *) fp, buf, len, &n); + } + return n; +} + +static size_t ff_write(void *fp, const void *buf, size_t len) { + UINT n = 0; + return f_write((FIL *) fp, (char *) buf, len, &n) == FR_OK ? n : 0; +} + +static size_t ff_seek(void *fp, size_t offset) { + f_lseek((FIL *) fp, offset); + return offset; +} + +static bool ff_rename(const char *from, const char *to) { + return f_rename(from, to) == FR_OK; +} + +static bool ff_remove(const char *path) { + return f_unlink(path) == FR_OK; +} + +static bool ff_mkdir(const char *path) { + return f_mkdir(path) == FR_OK; +} + +struct mg_fs mg_fs_fat = {ff_stat, ff_list, ff_open, ff_close, ff_read, + ff_write, ff_seek, ff_rename, ff_remove, ff_mkdir}; +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_packed.c" +#endif + + + + +struct packed_file { + const char *data; + size_t size; + size_t pos; +}; + +const char *mg_unpack(const char *path, size_t *size, time_t *mtime); +const char *mg_unlist(size_t no); + +#if MG_ENABLE_PACKED_FS +#else +const char *mg_unpack(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return NULL; +} +const char *mg_unlist(size_t no) { + (void) no; + return NULL; +} +#endif + +static int is_dir_prefix(const char *prefix, size_t n, const char *path) { + // MG_INFO(("[%.*s] [%s] %c", (int) n, prefix, path, path[n])); + return n < strlen(path) && strncmp(prefix, path, n) == 0 && + (n == 0 || path[n] == '/' || path[n - 1] == '/'); +} + +static int packed_stat(const char *path, size_t *size, time_t *mtime) { + const char *p; + size_t i, n = strlen(path); + if (mg_unpack(path, size, mtime)) return MG_FS_READ; // Regular file + // Scan all files. If `path` is a dir prefix for any of them, it's a dir + for (i = 0; (p = mg_unlist(i)) != NULL; i++) { + if (is_dir_prefix(path, n, p)) return MG_FS_DIR; + } + return 0; +} + +static void packed_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { + char buf[MG_PATH_MAX], tmp[sizeof(buf)]; + const char *path, *begin, *end; + size_t i, n = strlen(dir); + tmp[0] = '\0'; // Previously listed entry + for (i = 0; (path = mg_unlist(i)) != NULL; i++) { + if (!is_dir_prefix(dir, n, path)) continue; + begin = &path[n + 1]; + end = strchr(begin, '/'); + if (end == NULL) end = begin + strlen(begin); + mg_snprintf(buf, sizeof(buf), "%.*s", (int) (end - begin), begin); + buf[sizeof(buf) - 1] = '\0'; + // If this entry has been already listed, skip + // NOTE: we're assuming that file list is sorted alphabetically + if (strcmp(buf, tmp) == 0) continue; + fn(buf, userdata); // Not yet listed, call user function + strcpy(tmp, buf); // And save this entry as listed + } +} + +static void *packed_open(const char *path, int flags) { + size_t size = 0; + const char *data = mg_unpack(path, &size, NULL); + struct packed_file *fp = NULL; + if (data == NULL) return NULL; + if (flags & MG_FS_WRITE) return NULL; + fp = (struct packed_file *) calloc(1, sizeof(*fp)); + fp->size = size; + fp->data = data; + return (void *) fp; +} + +static void packed_close(void *fp) { + if (fp != NULL) free(fp); +} + +static size_t packed_read(void *fd, void *buf, size_t len) { + struct packed_file *fp = (struct packed_file *) fd; + if (fp->pos + len > fp->size) len = fp->size - fp->pos; + memcpy(buf, &fp->data[fp->pos], len); + fp->pos += len; + return len; +} + +static size_t packed_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} + +static size_t packed_seek(void *fd, size_t offset) { + struct packed_file *fp = (struct packed_file *) fd; + fp->pos = offset; + if (fp->pos > fp->size) fp->pos = fp->size; + return fp->pos; +} + +static bool packed_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} + +static bool packed_remove(const char *path) { + (void) path; + return false; +} + +static bool packed_mkdir(const char *path) { + (void) path; + return false; +} + +struct mg_fs mg_fs_packed = { + packed_stat, packed_list, packed_open, packed_close, packed_read, + packed_write, packed_seek, packed_rename, packed_remove, packed_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/fs_posix.c" +#endif + + +#if MG_ENABLE_FILE + +#ifndef MG_STAT_STRUCT +#define MG_STAT_STRUCT stat +#endif + +#ifndef MG_STAT_FUNC +#define MG_STAT_FUNC stat +#endif + +static int p_stat(const char *path, size_t *size, time_t *mtime) { +#if !defined(S_ISDIR) + MG_ERROR(("stat() API is not supported. %p %p %p", path, size, mtime)); + return 0; +#else +#if MG_ARCH == MG_ARCH_WIN32 + struct _stati64 st; + wchar_t tmp[MG_PATH_MAX]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, tmp, sizeof(tmp) / sizeof(tmp[0])); + if (_wstati64(tmp, &st) != 0) return 0; +#else + struct MG_STAT_STRUCT st; + if (MG_STAT_FUNC(path, &st) != 0) return 0; +#endif + if (size) *size = (size_t) st.st_size; + if (mtime) *mtime = st.st_mtime; + return MG_FS_READ | MG_FS_WRITE | (S_ISDIR(st.st_mode) ? MG_FS_DIR : 0); +#endif +} + +#if MG_ARCH == MG_ARCH_WIN32 +struct dirent { + char d_name[MAX_PATH]; +}; + +typedef struct win32_dir { + HANDLE handle; + WIN32_FIND_DATAW info; + struct dirent result; +} DIR; + +int gettimeofday(struct timeval *tv, void *tz) { + FILETIME ft; + unsigned __int64 tmpres = 0; + + if (tv != NULL) { + GetSystemTimeAsFileTime(&ft); + tmpres |= ft.dwHighDateTime; + tmpres <<= 32; + tmpres |= ft.dwLowDateTime; + tmpres /= 10; // convert into microseconds + tmpres -= (int64_t) 11644473600000000; + tv->tv_sec = (long) (tmpres / 1000000UL); + tv->tv_usec = (long) (tmpres % 1000000UL); + } + (void) tz; + return 0; +} + +static int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) { + int ret; + char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p; + strncpy(buf, path, sizeof(buf)); + buf[sizeof(buf) - 1] = '\0'; + // Trim trailing slashes. Leave backslash for paths like "X:\" + p = buf + strlen(buf) - 1; + while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0'; + memset(wbuf, 0, wbuf_len * sizeof(wchar_t)); + ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len); + // Convert back to Unicode. If doubly-converted string does not match the + // original, something is fishy, reject. + WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2), + NULL, NULL); + if (strcmp(buf, buf2) != 0) { + wbuf[0] = L'\0'; + ret = 0; + } + return ret; +} + +DIR *opendir(const char *name) { + DIR *d = NULL; + wchar_t wpath[MAX_PATH]; + DWORD attrs; + + if (name == NULL) { + SetLastError(ERROR_BAD_ARGUMENTS); + } else if ((d = (DIR *) calloc(1, sizeof(*d))) == NULL) { + SetLastError(ERROR_NOT_ENOUGH_MEMORY); + } else { + to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0])); + attrs = GetFileAttributesW(wpath); + if (attrs != 0Xffffffff && (attrs & FILE_ATTRIBUTE_DIRECTORY)) { + (void) wcscat(wpath, L"\\*"); + d->handle = FindFirstFileW(wpath, &d->info); + d->result.d_name[0] = '\0'; + } else { + free(d); + d = NULL; + } + } + return d; +} + +int closedir(DIR *d) { + int result = 0; + if (d != NULL) { + if (d->handle != INVALID_HANDLE_VALUE) + result = FindClose(d->handle) ? 0 : -1; + free(d); + } else { + result = -1; + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} + +struct dirent *readdir(DIR *d) { + struct dirent *result = NULL; + if (d != NULL) { + memset(&d->result, 0, sizeof(d->result)); + if (d->handle != INVALID_HANDLE_VALUE) { + result = &d->result; + WideCharToMultiByte(CP_UTF8, 0, d->info.cFileName, -1, result->d_name, + sizeof(result->d_name), NULL, NULL); + if (!FindNextFileW(d->handle, &d->info)) { + FindClose(d->handle); + d->handle = INVALID_HANDLE_VALUE; + } + } else { + SetLastError(ERROR_FILE_NOT_FOUND); + } + } else { + SetLastError(ERROR_BAD_ARGUMENTS); + } + return result; +} +#endif + +static void p_list(const char *dir, void (*fn)(const char *, void *), + void *userdata) { +#if MG_ENABLE_DIRLIST + struct dirent *dp; + DIR *dirp; + if ((dirp = (opendir(dir))) == NULL) return; + while ((dp = readdir(dirp)) != NULL) { + if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; + fn(dp->d_name, userdata); + } + closedir(dirp); +#else + (void) dir, (void) fn, (void) userdata; +#endif +} + +static void *p_open(const char *path, int flags) { + const char *mode = flags == MG_FS_READ ? "rb" : "a+b"; +#if MG_ARCH == MG_ARCH_WIN32 + wchar_t b1[MG_PATH_MAX], b2[10]; + MultiByteToWideChar(CP_UTF8, 0, path, -1, b1, sizeof(b1) / sizeof(b1[0])); + MultiByteToWideChar(CP_UTF8, 0, mode, -1, b2, sizeof(b2) / sizeof(b2[0])); + return (void *) _wfopen(b1, b2); +#else + return (void *) fopen(path, mode); +#endif +} + +static void p_close(void *fp) { + fclose((FILE *) fp); +} + +static size_t p_read(void *fp, void *buf, size_t len) { + return fread(buf, 1, len, (FILE *) fp); +} + +static size_t p_write(void *fp, const void *buf, size_t len) { + return fwrite(buf, 1, len, (FILE *) fp); +} + +static size_t p_seek(void *fp, size_t offset) { +#if (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64) || \ + (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \ + (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600) + if (fseeko((FILE *) fp, (off_t) offset, SEEK_SET) != 0) (void) 0; +#else + if (fseek((FILE *) fp, (long) offset, SEEK_SET) != 0) (void) 0; +#endif + return (size_t) ftell((FILE *) fp); +} + +static bool p_rename(const char *from, const char *to) { + return rename(from, to) == 0; +} + +static bool p_remove(const char *path) { + return remove(path) == 0; +} + +static bool p_mkdir(const char *path) { + return mkdir(path, 0775) == 0; +} + +#else + +static int p_stat(const char *path, size_t *size, time_t *mtime) { + (void) path, (void) size, (void) mtime; + return 0; +} +static void p_list(const char *path, void (*fn)(const char *, void *), + void *userdata) { + (void) path, (void) fn, (void) userdata; +} +static void *p_open(const char *path, int flags) { + (void) path, (void) flags; + return NULL; +} +static void p_close(void *fp) { + (void) fp; +} +static size_t p_read(void *fd, void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_write(void *fd, const void *buf, size_t len) { + (void) fd, (void) buf, (void) len; + return 0; +} +static size_t p_seek(void *fd, size_t offset) { + (void) fd, (void) offset; + return (size_t) ~0; +} +static bool p_rename(const char *from, const char *to) { + (void) from, (void) to; + return false; +} +static bool p_remove(const char *path) { + (void) path; + return false; +} +static bool p_mkdir(const char *path) { + (void) path; + return false; +} +#endif + +struct mg_fs mg_fs_posix = {p_stat, p_list, p_open, p_close, p_read, + p_write, p_seek, p_rename, p_remove, p_mkdir}; + +#ifdef MG_ENABLE_LINES +#line 1 "src/http.c" +#endif + + + + + + + + + + + +// Chunk deletion marker is the MSB in the "processed" counter +#define MG_DMARK ((size_t) 1 << (sizeof(size_t) * 8 - 1)) + +// Multipart POST example: +// --xyz +// Content-Disposition: form-data; name="val" +// +// abcdef +// --xyz +// Content-Disposition: form-data; name="foo"; filename="a.txt" +// Content-Type: text/plain +// +// hello world +// +// --xyz-- +size_t mg_http_next_multipart(struct mg_str body, size_t ofs, + struct mg_http_part *part) { + struct mg_str cd = mg_str_n("Content-Disposition", 19); + const char *s = body.ptr; + size_t b = ofs, h1, h2, b1, b2, max = body.len; + + // Init part params + if (part != NULL) part->name = part->filename = part->body = mg_str_n(0, 0); + + // Skip boundary + while (b + 2 < max && s[b] != '\r' && s[b + 1] != '\n') b++; + if (b <= ofs || b + 2 >= max) return 0; + // MG_INFO(("B: %zu %zu [%.*s]", ofs, b - ofs, (int) (b - ofs), s)); + + // Skip headers + h1 = h2 = b + 2; + for (;;) { + while (h2 + 2 < max && s[h2] != '\r' && s[h2 + 1] != '\n') h2++; + if (h2 == h1) break; + if (h2 + 2 >= max) return 0; + // MG_INFO(("Header: [%.*s]", (int) (h2 - h1), &s[h1])); + if (part != NULL && h1 + cd.len + 2 < h2 && s[h1 + cd.len] == ':' && + mg_ncasecmp(&s[h1], cd.ptr, cd.len) == 0) { + struct mg_str v = mg_str_n(&s[h1 + cd.len + 2], h2 - (h1 + cd.len + 2)); + part->name = mg_http_get_header_var(v, mg_str_n("name", 4)); + part->filename = mg_http_get_header_var(v, mg_str_n("filename", 8)); + } + h1 = h2 = h2 + 2; + } + b1 = b2 = h2 + 2; + while (b2 + 2 + (b - ofs) + 2 < max && !(s[b2] == '\r' && s[b2 + 1] == '\n' && + memcmp(&s[b2 + 2], s, b - ofs) == 0)) + b2++; + + if (b2 + 2 >= max) return 0; + if (part != NULL) part->body = mg_str_n(&s[b1], b2 - b1); + // MG_INFO(("Body: [%.*s]", (int) (b2 - b1), &s[b1])); + return b2 + 2; +} + +void mg_http_bauth(struct mg_connection *c, const char *user, + const char *pass) { + struct mg_str u = mg_str(user), p = mg_str(pass); + size_t need = c->send.len + 36 + (u.len + p.len) * 2; + if (c->send.size < need) mg_iobuf_resize(&c->send, need); + if (c->send.size >= need) { + int i, n = 0; + char *buf = (char *) &c->send.buf[c->send.len + 21]; + memcpy(&buf[-21], "Authorization: Basic ", 21); // DON'T use mg_send! + for (i = 0; i < (int) u.len; i++) { + n = mg_base64_update(((unsigned char *) u.ptr)[i], buf, n); + } + if (p.len > 0) { + n = mg_base64_update(':', buf, n); + for (i = 0; i < (int) p.len; i++) { + n = mg_base64_update(((unsigned char *) p.ptr)[i], buf, n); + } + } + n = mg_base64_final(buf, n); + c->send.len += 21 + (size_t) n + 2; + memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2); + } else { + MG_ERROR(("%lu %s cannot resize iobuf %d->%d ", c->id, c->label, + (int) c->send.size, (int) need)); + } +} + +struct mg_str mg_http_var(struct mg_str buf, struct mg_str name) { + struct mg_str k, v, result = mg_str_n(NULL, 0); + while (mg_split(&buf, &k, &v, '&')) { + if (name.len == k.len && mg_ncasecmp(name.ptr, k.ptr, k.len) == 0) { + result = v; + break; + } + } + return result; +} + +int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst, + size_t dst_len) { + int len; + if (dst == NULL || dst_len == 0) { + len = -2; // Bad destination + } else if (buf->ptr == NULL || name == NULL || buf->len == 0) { + len = -1; // Bad source + dst[0] = '\0'; + } else { + struct mg_str v = mg_http_var(*buf, mg_str(name)); + if (v.ptr == NULL) { + len = -4; // Name does not exist + } else { + len = mg_url_decode(v.ptr, v.len, dst, dst_len, 1); + if (len < 0) len = -3; // Failed to decode + } + } + return len; +} + +static bool isx(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || + (c >= 'A' && c <= 'F'); +} + +int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len, + int is_form_url_encoded) { + size_t i, j; + for (i = j = 0; i < src_len && j + 1 < dst_len; i++, j++) { + if (src[i] == '%') { + // Use `i + 2 < src_len`, not `i < src_len - 2`, note small src_len + if (i + 2 < src_len && isx(src[i + 1]) && isx(src[i + 2])) { + mg_unhex(src + i + 1, 2, (uint8_t *) &dst[j]); + i += 2; + } else { + return -1; + } + } else if (is_form_url_encoded && src[i] == '+') { + dst[j] = ' '; + } else { + dst[j] = src[i]; + } + } + if (j < dst_len) dst[j] = '\0'; // Null-terminate the destination + return i >= src_len && j < dst_len ? (int) j : -1; +} + +static bool isok(uint8_t c) { + return c == '\n' || c == '\r' || c >= ' '; +} + +int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) { + size_t i; + for (i = 0; i < buf_len; i++) { + if (!isok(buf[i])) return -1; + if ((i > 0 && buf[i] == '\n' && buf[i - 1] == '\n') || + (i > 3 && buf[i] == '\n' && buf[i - 1] == '\r' && buf[i - 2] == '\n')) + return (int) i + 1; + } + return 0; +} + +static const char *skip(const char *s, const char *e, const char *d, + struct mg_str *v) { + v->ptr = s; + while (s < e && *s != '\n' && strchr(d, *s) == NULL) s++; + v->len = (size_t) (s - v->ptr); + while (s < e && strchr(d, *s) != NULL) s++; + return s; +} + +struct mg_str *mg_http_get_header(struct mg_http_message *h, const char *name) { + size_t i, n = strlen(name), max = sizeof(h->headers) / sizeof(h->headers[0]); + for (i = 0; i < max && h->headers[i].name.len > 0; i++) { + struct mg_str *k = &h->headers[i].name, *v = &h->headers[i].value; + if (n == k->len && mg_ncasecmp(k->ptr, name, n) == 0) return v; + } + return NULL; +} + +static void mg_http_parse_headers(const char *s, const char *end, + struct mg_http_header *h, int max_headers) { + int i; + for (i = 0; i < max_headers; i++) { + struct mg_str k, v, tmp; + const char *he = skip(s, end, "\n", &tmp); + s = skip(s, he, ": \r\n", &k); + s = skip(s, he, "\r\n", &v); + if (k.len == tmp.len) continue; + while (v.len > 0 && v.ptr[v.len - 1] == ' ') v.len--; // Trim spaces + if (k.len == 0) break; + // MG_INFO(("--HH [%.*s] [%.*s] [%.*s]", (int) tmp.len - 1, tmp.ptr, + //(int) k.len, k.ptr, (int) v.len, v.ptr)); + h[i].name = k; + h[i].value = v; + } +} + +int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) { + int is_response, req_len = mg_http_get_request_len((unsigned char *) s, len); + const char *end = s == NULL ? NULL : s + req_len, *qs; // Cannot add to NULL + struct mg_str *cl; + + memset(hm, 0, sizeof(*hm)); + if (req_len <= 0) return req_len; + + hm->message.ptr = hm->head.ptr = s; + hm->body.ptr = end; + hm->head.len = (size_t) req_len; + hm->chunk.ptr = end; + hm->message.len = hm->body.len = (size_t) ~0; // Set body length to infinite + + // Parse request line + s = skip(s, end, " ", &hm->method); + s = skip(s, end, " ", &hm->uri); + s = skip(s, end, "\r\n", &hm->proto); + + // Sanity check. Allow protocol/reason to be empty + if (hm->method.len == 0 || hm->uri.len == 0) return -1; + + // If URI contains '?' character, setup query string + if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) { + hm->query.ptr = qs + 1; + hm->query.len = (size_t) (&hm->uri.ptr[hm->uri.len] - (qs + 1)); + hm->uri.len = (size_t) (qs - hm->uri.ptr); + } + + mg_http_parse_headers(s, end, hm->headers, + sizeof(hm->headers) / sizeof(hm->headers[0])); + if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) { + hm->body.len = (size_t) mg_to64(*cl); + hm->message.len = (size_t) req_len + hm->body.len; + } + + // mg_http_parse() is used to parse both HTTP requests and HTTP + // responses. If HTTP response does not have Content-Length set, then + // body is read until socket is closed, i.e. body.len is infinite (~0). + // + // For HTTP requests though, according to + // http://tools.ietf.org/html/rfc7231#section-8.1.3, + // only POST and PUT methods have defined body semantics. + // Therefore, if Content-Length is not specified and methods are + // not one of PUT or POST, set body length to 0. + // + // So, if it is HTTP request, and Content-Length is not set, + // and method is not (PUT or POST) then reset body length to zero. + is_response = mg_ncasecmp(hm->method.ptr, "HTTP/", 5) == 0; + if (hm->body.len == (size_t) ~0 && !is_response && + mg_vcasecmp(&hm->method, "PUT") != 0 && + mg_vcasecmp(&hm->method, "POST") != 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + // The 204 (No content) responses also have 0 body length + if (hm->body.len == (size_t) ~0 && is_response && + mg_vcasecmp(&hm->uri, "204") == 0) { + hm->body.len = 0; + hm->message.len = (size_t) req_len; + } + + return req_len; +} + +static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt, + va_list *ap) { + size_t len = c->send.len; + mg_send(c, " \r\n", 10); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + if (c->send.len >= len + 10) { + mg_snprintf((char *) c->send.buf + len, 9, "%08lx", c->send.len - len - 10); + c->send.buf[len + 8] = '\r'; + if (c->send.len == len + 10) c->is_resp = 0; // Last chunk, reset marker + } + mg_send(c, "\r\n", 2); +} + +void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_http_vprintf_chunk(c, fmt, &ap); + va_end(ap); +} + +void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) { + mg_printf(c, "%lx\r\n", (unsigned long) len); + mg_send(c, buf, len); + mg_send(c, "\r\n", 2); + if (len == 0) c->is_resp = 0; +} + +// clang-format off +static const char *mg_http_status_code_str(int status_code) { + switch (status_code) { + case 100: return "Continue"; + case 201: return "Created"; + case 202: return "Accepted"; + case 204: return "No Content"; + case 206: return "Partial Content"; + case 301: return "Moved Permanently"; + case 302: return "Found"; + case 304: return "Not Modified"; + case 400: return "Bad Request"; + case 401: return "Unauthorized"; + case 403: return "Forbidden"; + case 404: return "Not Found"; + case 418: return "I'm a teapot"; + case 500: return "Internal Server Error"; + case 501: return "Not Implemented"; + default: return "OK"; + } +} +// clang-format on + +void mg_http_reply(struct mg_connection *c, int code, const char *headers, + const char *fmt, ...) { + va_list ap; + size_t len; + mg_printf(c, "HTTP/1.1 %d %s\r\n%sContent-Length: \r\n\r\n", code, + mg_http_status_code_str(code), headers == NULL ? "" : headers); + len = c->send.len; + va_start(ap, fmt); + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, &ap); + va_end(ap); + if (c->send.len > 15) { + mg_snprintf((char *) &c->send.buf[len - 14], 11, "%010lu", + (unsigned long) (c->send.len - len)); + c->is_resp = 0; + c->send.buf[len - 4] = '\r'; // Change ending 0 to space + } + c->is_resp = 0; +} + +static void http_cb(struct mg_connection *, int, void *, void *); +static void restore_http_cb(struct mg_connection *c) { + mg_fs_close((struct mg_fd *) c->pfn_data); + c->pfn_data = NULL; + c->pfn = http_cb; + c->is_resp = 0; +} + +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime); +char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime) { + mg_snprintf(buf, len, "\"%lld.%lld\"", (int64_t) mtime, (int64_t) size); + return buf; +} + +static void static_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_WRITE || ev == MG_EV_POLL) { + struct mg_fd *fd = (struct mg_fd *) fn_data; + // Read to send IO buffer directly, avoid extra on-stack buffer + size_t n, max = MG_IO_SIZE, space, *cl = (size_t *) c->label; + if (c->send.size < max) mg_iobuf_resize(&c->send, max); + if (c->send.len >= c->send.size) return; // Rate limit + if ((space = c->send.size - c->send.len) > *cl) space = *cl; + n = fd->fs->rd(fd->fd, c->send.buf + c->send.len, space); + c->send.len += n; + *cl -= n; + if (n == 0) restore_http_cb(c); + } else if (ev == MG_EV_CLOSE) { + restore_http_cb(c); + } + (void) ev_data; +} + +// Known mime types. Keep it outside guess_content_type() function, since +// some environments don't like it defined there. +// clang-format off +static struct mg_str s_known_types[] = { + MG_C_STR("html"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("htm"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("css"), MG_C_STR("text/css; charset=utf-8"), + MG_C_STR("js"), MG_C_STR("text/javascript; charset=utf-8"), + MG_C_STR("gif"), MG_C_STR("image/gif"), + MG_C_STR("png"), MG_C_STR("image/png"), + MG_C_STR("jpg"), MG_C_STR("image/jpeg"), + MG_C_STR("jpeg"), MG_C_STR("image/jpeg"), + MG_C_STR("woff"), MG_C_STR("font/woff"), + MG_C_STR("ttf"), MG_C_STR("font/ttf"), + MG_C_STR("svg"), MG_C_STR("image/svg+xml"), + MG_C_STR("txt"), MG_C_STR("text/plain; charset=utf-8"), + MG_C_STR("avi"), MG_C_STR("video/x-msvideo"), + MG_C_STR("csv"), MG_C_STR("text/csv"), + MG_C_STR("doc"), MG_C_STR("application/msword"), + MG_C_STR("exe"), MG_C_STR("application/octet-stream"), + MG_C_STR("gz"), MG_C_STR("application/gzip"), + MG_C_STR("ico"), MG_C_STR("image/x-icon"), + MG_C_STR("json"), MG_C_STR("application/json"), + MG_C_STR("mov"), MG_C_STR("video/quicktime"), + MG_C_STR("mp3"), MG_C_STR("audio/mpeg"), + MG_C_STR("mp4"), MG_C_STR("video/mp4"), + MG_C_STR("mpeg"), MG_C_STR("video/mpeg"), + MG_C_STR("pdf"), MG_C_STR("application/pdf"), + MG_C_STR("shtml"), MG_C_STR("text/html; charset=utf-8"), + MG_C_STR("tgz"), MG_C_STR("application/tar-gz"), + MG_C_STR("wav"), MG_C_STR("audio/wav"), + MG_C_STR("webp"), MG_C_STR("image/webp"), + MG_C_STR("zip"), MG_C_STR("application/zip"), + MG_C_STR("3gp"), MG_C_STR("video/3gpp"), + {0, 0}, +}; +// clang-format on + +static struct mg_str guess_content_type(struct mg_str path, const char *extra) { + struct mg_str k, v, s = mg_str(extra); + size_t i = 0; + + // Shrink path to its extension only + while (i < path.len && path.ptr[path.len - i - 1] != '.') i++; + path.ptr += path.len - i; + path.len = i; + + // Process user-provided mime type overrides, if any + while (mg_commalist(&s, &k, &v)) { + if (mg_strcmp(path, k) == 0) return v; + } + + // Process built-in mime types + for (i = 0; s_known_types[i].ptr != NULL; i += 2) { + if (mg_strcmp(path, s_known_types[i]) == 0) return s_known_types[i + 1]; + } + + return mg_str("text/plain; charset=utf-8"); +} + +static int getrange(struct mg_str *s, int64_t *a, int64_t *b) { + size_t i, numparsed = 0; + // MG_INFO(("%.*s", (int) s->len, s->ptr)); + for (i = 0; i + 6 < s->len; i++) { + if (memcmp(&s->ptr[i], "bytes=", 6) == 0) { + struct mg_str p = mg_str_n(s->ptr + i + 6, s->len - i - 6); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + *a = mg_to64(p); + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + while (p.len && p.ptr[0] >= '0' && p.ptr[0] <= '9') p.ptr++, p.len--; + if (p.len && p.ptr[0] == '-') p.ptr++, p.len--; + *b = mg_to64(p); + if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++; + // MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed)); + break; + } + } + return (int) numparsed; +} + +void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm, + const char *path, + const struct mg_http_serve_opts *opts) { + char etag[64], tmp[MG_PATH_MAX]; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_fd *fd = path == NULL ? NULL : mg_fs_open(fs, path, MG_FS_READ); + size_t size = 0; + time_t mtime = 0; + struct mg_str *inm = NULL; + struct mg_str mime = guess_content_type(mg_str(path), opts->mime_types); + bool gzip = false; + + // If file does not exist, we try to open file PATH.gz - and if such + // pre-compressed .gz file exists, serve it with the Content-Encoding: gzip + // Note - we ignore Accept-Encoding, cause we don't have a choice + if (fd == NULL) { + MG_DEBUG(("NULL [%s]", path)); + mg_snprintf(tmp, sizeof(tmp), "%s.gz", path); + if ((fd = mg_fs_open(fs, tmp, MG_FS_READ)) != NULL) { + gzip = true; + path = tmp; + } else if (opts->page404 != NULL) { + // No precompressed file, serve 404 + fd = mg_fs_open(fs, opts->page404, MG_FS_READ); + mime = guess_content_type(mg_str(path), opts->mime_types); + path = opts->page404; + } + } + + if (fd == NULL || fs->st(path, &size, &mtime) == 0) { + mg_http_reply(c, 404, opts->extra_headers, "Not found\n"); + mg_fs_close(fd); + // NOTE: mg_http_etag() call should go first! + } else if (mg_http_etag(etag, sizeof(etag), size, mtime) != NULL && + (inm = mg_http_get_header(hm, "If-None-Match")) != NULL && + mg_vcasecmp(inm, etag) == 0) { + mg_fs_close(fd); + mg_http_reply(c, 304, opts->extra_headers, ""); + } else { + int n, status = 200; + char range[100]; + int64_t r1 = 0, r2 = 0, cl = (int64_t) size; + + // Handle Range header + struct mg_str *rh = mg_http_get_header(hm, "Range"); + range[0] = '\0'; + if (rh != NULL && (n = getrange(rh, &r1, &r2)) > 0 && r1 >= 0 && r2 >= 0) { + // If range is specified like "400-", set second limit to content len + if (n == 1) r2 = cl - 1; + if (r1 > r2 || r2 >= cl) { + status = 416; + cl = 0; + mg_snprintf(range, sizeof(range), "Content-Range: bytes */%lld\r\n", + (int64_t) size); + } else { + status = 206; + cl = r2 - r1 + 1; + mg_snprintf(range, sizeof(range), + "Content-Range: bytes %lld-%lld/%lld\r\n", r1, r1 + cl - 1, + (int64_t) size); + fs->sk(fd->fd, (size_t) r1); + } + } + mg_printf(c, + "HTTP/1.1 %d %s\r\n" + "Content-Type: %.*s\r\n" + "Etag: %s\r\n" + "Content-Length: %llu\r\n" + "%s%s%s\r\n", + status, mg_http_status_code_str(status), (int) mime.len, mime.ptr, + etag, cl, gzip ? "Content-Encoding: gzip\r\n" : "", range, + opts->extra_headers ? opts->extra_headers : ""); + if (mg_vcasecmp(&hm->method, "HEAD") == 0) { + c->is_draining = 1; + c->is_resp = 0; + mg_fs_close(fd); + } else { + c->pfn = static_cb; + c->pfn_data = fd; + *(size_t *) c->label = (size_t) cl; // Track to-be-sent content length + } + } +} + +struct printdirentrydata { + struct mg_connection *c; + struct mg_http_message *hm; + const struct mg_http_serve_opts *opts; + const char *dir; +}; + +static void printdirentry(const char *name, void *userdata) { + struct printdirentrydata *d = (struct printdirentrydata *) userdata; + struct mg_fs *fs = d->opts->fs == NULL ? &mg_fs_posix : d->opts->fs; + size_t size = 0; + time_t t = 0; + char path[MG_PATH_MAX], sz[40], mod[40]; + int flags, n = 0; + + // MG_DEBUG(("[%s] [%s]", d->dir, name)); + if (mg_snprintf(path, sizeof(path), "%s%c%s", d->dir, '/', name) > + sizeof(path)) { + MG_ERROR(("%s truncated", name)); + } else if ((flags = fs->st(path, &size, &t)) == 0) { + MG_ERROR(("%lu stat(%s): %d", d->c->id, path, errno)); + } else { + const char *slash = flags & MG_FS_DIR ? "/" : ""; + if (flags & MG_FS_DIR) { + mg_snprintf(sz, sizeof(sz), "%s", "[DIR]"); + } else { + mg_snprintf(sz, sizeof(sz), "%lld", (uint64_t) size); + } +#if defined(MG_HTTP_DIRLIST_TIME) + char time_str[30]; + struct tm *time_info = localtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#elif defined(MG_HTTP_DIRLIST_TIME_UTC) + char time_str[30]; + struct tm *time_info = gmtime(&t); + strftime(time_str, sizeof time_str, "%Y/%m/%d %H:%M:%S", time_info); + mg_snprintf(mod, sizeof(mod), "%s", time_str); +#else + mg_snprintf(mod, sizeof(mod), "%ld", (unsigned long) t); +#endif + n = (int) mg_url_encode(name, strlen(name), path, sizeof(path)); + mg_printf(d->c, + " %s%s" + "%s%s\n", + n, path, slash, name, slash, (unsigned long) t, mod, + flags & MG_FS_DIR ? (int64_t) -1 : (int64_t) size, sz); + } +} + +static void listdir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *dir) { + const char *sort_js_code = + ""; + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct printdirentrydata d = {c, hm, opts, dir}; + char tmp[10], buf[MG_PATH_MAX]; + size_t off, n; + int len = mg_url_decode(hm->uri.ptr, hm->uri.len, buf, sizeof(buf), 0); + struct mg_str uri = len > 0 ? mg_str_n(buf, (size_t) len) : hm->uri; + + mg_printf(c, + "HTTP/1.1 200 OK\r\n" + "Content-Type: text/html; charset=utf-8\r\n" + "%s" + "Content-Length: \r\n\r\n", + opts->extra_headers == NULL ? "" : opts->extra_headers); + off = c->send.len; // Start of body + mg_printf(c, + "Index of %.*s%s%s" + "" + "

Index of %.*s

" + "" + "" + "" + "" + "\n", + (int) uri.len, uri.ptr, sort_js_code, sort_js_code2, (int) uri.len, + uri.ptr); + mg_printf(c, "%s", + " " + "\n"); + + fs->ls(dir, printdirentry, &d); + mg_printf(c, + "" + "
Name" + "ModifiedSize
..[DIR]
Mongoose v.%s
\n", + MG_VERSION); + n = mg_snprintf(tmp, sizeof(tmp), "%lu", (unsigned long) (c->send.len - off)); + if (n > sizeof(tmp)) n = 0; + memcpy(c->send.buf + off - 12, tmp, n); // Set content length + c->is_resp = 0; // Mark response end +} + +// Resolve requested file into `path` and return its fs->st() result +static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, struct mg_str url, struct mg_str dir, + char *path, size_t path_size) { + int flags, tmp; + // Append URI to the root_dir, and sanitize it + size_t n = mg_snprintf(path, path_size, "%.*s", (int) dir.len, dir.ptr); + if (n > path_size) n = path_size; + path[path_size - 1] = '\0'; + if (n + 2 < path_size) path[n++] = '/', path[n] = '\0'; + mg_url_decode(hm->uri.ptr + url.len, hm->uri.len - url.len, path + n, + path_size - n, 0); + path[path_size - 1] = '\0'; // Double-check + mg_remove_double_dots(path); + n = strlen(path); + while (n > 1 && path[n - 1] == '/') path[--n] = 0; // Trim trailing slashes + flags = mg_vcmp(&hm->uri, "/") == 0 ? MG_FS_DIR : fs->st(path, NULL, NULL); + MG_VERBOSE(("%lu %.*s -> %s %d", c->id, (int) hm->uri.len, hm->uri.ptr, path, + flags)); + if (flags == 0) { + // Do nothing - let's caller decide + } else if ((flags & MG_FS_DIR) && hm->uri.len > 0 && + hm->uri.ptr[hm->uri.len - 1] != '/') { + mg_printf(c, + "HTTP/1.1 301 Moved\r\n" + "Location: %.*s/\r\n" + "Content-Length: 0\r\n" + "\r\n", + (int) hm->uri.len, hm->uri.ptr); + flags = -1; + } else if (flags & MG_FS_DIR) { + if (((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX) > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0) || + (mg_snprintf(path + n, path_size - n, "/index.shtml") > 0 && + (tmp = fs->st(path, NULL, NULL)) != 0))) { + flags = tmp; + } else if ((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX ".gz") > + 0 && + (tmp = fs->st(path, NULL, NULL)) != + 0)) { // check for gzipped index + flags = tmp; + path[n + 1 + strlen(MG_HTTP_INDEX)] = + '\0'; // Remove appended .gz in index file name + } else { + path[n] = '\0'; // Remove appended index file name + } + } + return flags; +} + +static int uri_to_path(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts, char *path, + size_t path_size) { + struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs; + struct mg_str k, v, s = mg_str(opts->root_dir), u = {0, 0}, p = {0, 0}; + while (mg_commalist(&s, &k, &v)) { + if (v.len == 0) v = k, k = mg_str("/"); + if (hm->uri.len < k.len) continue; + if (mg_strcmp(k, mg_str_n(hm->uri.ptr, k.len)) != 0) continue; + u = k, p = v; + } + return uri_to_path2(c, hm, fs, u, p, path, path_size); +} + +void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm, + const struct mg_http_serve_opts *opts) { + char path[MG_PATH_MAX]; + const char *sp = opts->ssi_pattern; + int flags = uri_to_path(c, hm, opts, path, sizeof(path)); + if (flags < 0) { + // Do nothing: the response has already been sent by uri_to_path() + } else if (flags & MG_FS_DIR) { + listdir(c, hm, opts, path); + } else if (flags && sp != NULL && + mg_globmatch(sp, strlen(sp), path, strlen(path))) { + mg_http_serve_ssi(c, opts->root_dir, path); + } else { + mg_http_serve_file(c, hm, path, opts); + } +} + +static bool mg_is_url_safe(int c) { + return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || + (c >= 'A' && c <= 'Z') || c == '.' || c == '_' || c == '-' || c == '~'; +} + +size_t mg_url_encode(const char *s, size_t sl, char *buf, size_t len) { + size_t i, n = 0; + for (i = 0; i < sl; i++) { + int c = *(unsigned char *) &s[i]; + if (n + 4 >= len) return 0; + if (mg_is_url_safe(c)) { + buf[n++] = s[i]; + } else { + buf[n++] = '%'; + mg_hex(&s[i], 1, &buf[n]); + n += 2; + } + } + return n; +} + +void mg_http_creds(struct mg_http_message *hm, char *user, size_t userlen, + char *pass, size_t passlen) { + struct mg_str *v = mg_http_get_header(hm, "Authorization"); + user[0] = pass[0] = '\0'; + if (v != NULL && v->len > 6 && memcmp(v->ptr, "Basic ", 6) == 0) { + char buf[256]; + int n = mg_base64_decode(v->ptr + 6, (int) v->len - 6, buf); + const char *p = (const char *) memchr(buf, ':', n > 0 ? (size_t) n : 0); + if (p != NULL) { + mg_snprintf(user, userlen, "%.*s", (int) (p - buf), buf); + mg_snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1); + } + } else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) { + mg_snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7); + } else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) { + struct mg_str t = mg_http_get_header_var(*v, mg_str_n("access_token", 12)); + if (t.len > 0) mg_snprintf(pass, passlen, "%.*s", (int) t.len, t.ptr); + } else { + mg_http_get_var(&hm->query, "access_token", pass, passlen); + } +} + +static struct mg_str stripquotes(struct mg_str s) { + return s.len > 1 && s.ptr[0] == '"' && s.ptr[s.len - 1] == '"' + ? mg_str_n(s.ptr + 1, s.len - 2) + : s; +} + +struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v) { + size_t i; + for (i = 0; v.len > 0 && i + v.len + 2 < s.len; i++) { + if (s.ptr[i + v.len] == '=' && memcmp(&s.ptr[i], v.ptr, v.len) == 0) { + const char *p = &s.ptr[i + v.len + 1], *b = p, *x = &s.ptr[s.len]; + int q = p < x && *p == '"' ? 1 : 0; + while (p < x && + (q ? p == b || *p != '"' : *p != ';' && *p != ' ' && *p != ',')) + p++; + // MG_INFO(("[%.*s] [%.*s] [%.*s]", (int) s.len, s.ptr, (int) v.len, + // v.ptr, (int) (p - b), b)); + return stripquotes(mg_str_n(b, (size_t) (p - b + q))); + } + } + return mg_str_n(NULL, 0); +} + +bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) { + return mg_match(hm->uri, mg_str(glob), NULL); +} + +long mg_http_upload(struct mg_connection *c, struct mg_http_message *hm, + struct mg_fs *fs, const char *path, size_t max_size) { + char buf[20] = "0"; + long res = 0, offset; + mg_http_get_var(&hm->query, "offset", buf, sizeof(buf)); + offset = strtol(buf, NULL, 0); + if (hm->body.len == 0) { + mg_http_reply(c, 200, "", "%ld", res); // Nothing to write + } else { + struct mg_fd *fd; + size_t current_size = 0; + MG_DEBUG(("%s -> %d bytes @ %ld", path, (int) hm->body.len, offset)); + if (offset == 0) fs->rm(path); // If offset if 0, truncate file + fs->st(path, ¤t_size, NULL); + if (offset < 0) { + mg_http_reply(c, 400, "", "offset required"); + res = -1; + } else if (offset > 0 && current_size != (size_t) offset) { + mg_http_reply(c, 400, "", "%s: offset mismatch", path); + res = -2; + } else if ((size_t) offset + hm->body.len > max_size) { + mg_http_reply(c, 400, "", "%s: over max size of %lu", path, + (unsigned long) max_size); + res = -3; + } else if ((fd = mg_fs_open(fs, path, MG_FS_WRITE)) == NULL) { + mg_http_reply(c, 400, "", "open(%s): %d", path, errno); + res = -4; + } else { + res = offset + (long) fs->wr(fd->fd, hm->body.ptr, hm->body.len); + mg_fs_close(fd); + mg_http_reply(c, 200, "", "%ld", res); + } + } + return res; +} + +int mg_http_status(const struct mg_http_message *hm) { + return atoi(hm->uri.ptr); +} + +// If a server sends data to the client using chunked encoding, Mongoose strips +// off the chunking prefix (hex length and \r\n) and suffix (\r\n), appends the +// stripped data to the body, and fires the MG_EV_HTTP_CHUNK event. When zero +// chunk is received, we fire MG_EV_HTTP_MSG, and the body already has all +// chunking prefixes/suffixes stripped. +// +// If a server sends data without chunked encoding, we also fire a series of +// MG_EV_HTTP_CHUNK events for every received piece of data, and then we fire +// MG_EV_HTTP_MSG event in the end. +// +// We track total processed length in the c->pfn_data, which is a void * +// pointer: we store a size_t value there. +static bool getchunk(struct mg_str s, size_t *prefixlen, size_t *datalen) { + size_t i = 0, n; + while (i < s.len && s.ptr[i] != '\r' && s.ptr[i] != '\n') i++; + n = mg_unhexn(s.ptr, i); + // MG_INFO(("%d %d", (int) (i + n + 4), (int) s.len)); + if (s.len < i + n + 4) return false; // Chunk not yet fully buffered + if (s.ptr[i] != '\r' || s.ptr[i + 1] != '\n') return false; + if (s.ptr[i + n + 2] != '\r' || s.ptr[i + n + 3] != '\n') return false; + *prefixlen = i + 2; + *datalen = n; + return true; +} + +static bool mg_is_chunked(struct mg_http_message *hm) { + const char *needle = "chunked"; + struct mg_str *te = mg_http_get_header(hm, "Transfer-Encoding"); + return te != NULL && mg_vcasecmp(te, needle) == 0; +} + +void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm) { + size_t ofs = (size_t) (hm->chunk.ptr - (char *) c->recv.buf); + mg_iobuf_del(&c->recv, ofs, hm->chunk.len); + c->pfn_data = (void *) ((size_t) c->pfn_data | MG_DMARK); +} + +static void deliver_chunked_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + // | ... headers ... | HEXNUM\r\n ..data.. \r\n | ...... + // +------------------+--------------------------+---- + // | hlen | chunk1 | ...... + char *buf = (char *) &c->recv.buf[hlen], *p = buf; + size_t len = c->recv.len - hlen; + size_t processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t mark, pl, dl, del = 0, ofs = 0; + bool last = false; + if (processed <= len) len -= processed, buf += processed; + while (!last && getchunk(mg_str_n(buf + ofs, len - ofs), &pl, &dl)) { + size_t saved = c->recv.len; + memmove(p + processed, buf + ofs + pl, dl); + // MG_INFO(("P2 [%.*s]", (int) (processed + dl), p)); + hm->chunk = mg_str_n(p + processed, dl); + mg_call(c, MG_EV_HTTP_CHUNK, hm); + ofs += pl + dl + 2, del += pl + 2; // 2 is for \r\n suffix + processed += dl; + if (c->recv.len != saved) processed -= dl, buf -= dl; + mg_hexdump(c->recv.buf, hlen + processed); + last = (dl == 0); + } + mg_iobuf_del(&c->recv, hlen + processed, del); + mark = ((size_t) c->pfn_data) & MG_DMARK; + c->pfn_data = (void *) (processed | mark); + if (last) { + hm->body.len = processed; + hm->message.len = hlen + processed; + c->pfn_data = NULL; + if (mark) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + // MG_INFO(("LAST, mark: %lx", mark)); + // mg_hexdump(c->recv.buf, c->recv.len); + } +} + +static void deliver_normal_chunks(struct mg_connection *c, size_t hlen, + struct mg_http_message *hm, bool *next) { + size_t left, processed = ((size_t) c->pfn_data) & ~MG_DMARK; + size_t deleted = ((size_t) c->pfn_data) & MG_DMARK; + hm->chunk = mg_str_n((char *) &c->recv.buf[hlen], c->recv.len - hlen); + if (processed <= hm->chunk.len && !deleted) { + hm->chunk.len -= processed; + hm->chunk.ptr += processed; + } + left = hm->body.len < processed ? 0 : hm->body.len - processed; + if (hm->chunk.len > left) hm->chunk.len = left; + if (hm->chunk.len > 0) mg_call(c, MG_EV_HTTP_CHUNK, hm); + processed += hm->chunk.len; + deleted = ((size_t) c->pfn_data) & MG_DMARK; // Re-evaluate after user call + if (processed >= hm->body.len) { // Last, 0-len chunk + hm->chunk.len = 0; // Reset length + mg_call(c, MG_EV_HTTP_CHUNK, hm); // Call user handler + c->pfn_data = NULL; // Reset processed counter + if (processed && deleted) mg_iobuf_del(&c->recv, 0, hlen), *next = true; + } else { + c->pfn_data = (void *) (processed | deleted); // if it is set + } +} + +static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ || ev == MG_EV_CLOSE) { + struct mg_http_message hm; + // mg_hexdump(c->recv.buf, c->recv.len); + while (c->recv.buf != NULL && c->recv.len > 0) { + bool next = false; + int hlen = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm); + if (hlen < 0) { + mg_error(c, "HTTP parse:\n%.*s", (int) c->recv.len, c->recv.buf); + break; + } + if (c->is_resp) break; // Response is still generated + if (hlen == 0) break; // Request is not buffered yet + if (ev == MG_EV_CLOSE) { // If client did not set Content-Length + hm.message.len = c->recv.len; // and closes now, deliver a MSG + hm.body.len = hm.message.len - (size_t) (hm.body.ptr - hm.message.ptr); + } + if (mg_is_chunked(&hm)) { + deliver_chunked_chunks(c, (size_t) hlen, &hm, &next); + } else { + deliver_normal_chunks(c, (size_t) hlen, &hm, &next); + } + if (next) continue; // Chunks & request were deleted + // Chunk events are delivered. If we have full body, deliver MSG + if (c->recv.len < hm.message.len) break; + if (c->is_accepted) c->is_resp = 1; // Start generating response + mg_call(c, MG_EV_HTTP_MSG, &hm); // User handler can clear is_resp + mg_iobuf_del(&c->recv, 0, hm.message.len); + } + } + (void) evd, (void) fnd; +} + +struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = http_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/iobuf.c" +#endif + + + + +// Not using memset for zeroing memory, cause it can be dropped by compiler +// See https://github.com/cesanta/mongoose/pull/1265 +static void zeromem(volatile unsigned char *buf, size_t len) { + if (buf != NULL) { + while (len--) *buf++ = 0; + } +} + +static size_t roundup(size_t size, size_t align) { + return align == 0 ? size : (size + align - 1) / align * align; +} + +int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) { + int ok = 1; + new_size = roundup(new_size, io->align); + if (new_size == 0) { + zeromem(io->buf, io->size); + free(io->buf); + io->buf = NULL; + io->len = io->size = 0; + } else if (new_size != io->size) { + // NOTE(lsm): do not use realloc here. Use calloc/free only, to ease the + // porting to some obscure platforms like FreeRTOS + void *p = calloc(1, new_size); + if (p != NULL) { + size_t len = new_size < io->len ? new_size : io->len; + if (len > 0 && io->buf != NULL) memmove(p, io->buf, len); + zeromem(io->buf, io->size); + free(io->buf); + io->buf = (unsigned char *) p; + io->size = new_size; + } else { + ok = 0; + MG_ERROR(("%lld->%lld", (uint64_t) io->size, (uint64_t) new_size)); + } + } + return ok; +} + +int mg_iobuf_init(struct mg_iobuf *io, size_t size, size_t align) { + io->buf = NULL; + io->align = align; + io->size = io->len = 0; + return mg_iobuf_resize(io, size); +} + +size_t mg_iobuf_add(struct mg_iobuf *io, size_t ofs, const void *buf, + size_t len) { + size_t new_size = roundup(io->len + len, io->align); + mg_iobuf_resize(io, new_size); // Attempt to resize + if (new_size != io->size) len = 0; // Resize failure, append nothing + if (ofs < io->len) memmove(io->buf + ofs + len, io->buf + ofs, io->len - ofs); + if (buf != NULL) memmove(io->buf + ofs, buf, len); + if (ofs > io->len) io->len += ofs - io->len; + io->len += len; + return len; +} + +size_t mg_iobuf_del(struct mg_iobuf *io, size_t ofs, size_t len) { + if (ofs > io->len) ofs = io->len; + if (ofs + len > io->len) len = io->len - ofs; + if (io->buf) memmove(io->buf + ofs, io->buf + ofs + len, io->len - ofs - len); + if (io->buf) zeromem(io->buf + io->len - len, len); + io->len -= len; + return len; +} + +void mg_iobuf_free(struct mg_iobuf *io) { + mg_iobuf_resize(io, 0); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/json.c" +#endif + + + + +static const char *escapeseq(int esc) { + return esc ? "\b\f\n\r\t\\\"" : "bfnrt\\\""; +} + +static char json_esc(int c, int esc) { + const char *p, *esc1 = escapeseq(esc), *esc2 = escapeseq(!esc); + for (p = esc1; *p != '\0'; p++) { + if (*p == c) return esc2[p - esc1]; + } + return 0; +} + +static int mg_pass_string(const char *s, int len) { + int i; + for (i = 0; i < len; i++) { + if (s[i] == '\\' && i + 1 < len && json_esc(s[i + 1], 1)) { + i++; + } else if (s[i] == '\0') { + return MG_JSON_INVALID; + } else if (s[i] == '"') { + return i; + } + } + return MG_JSON_INVALID; +} + +static double mg_atod(const char *p, int len, int *numlen) { + double d = 0.0; + int i = 0, sign = 1; + + // Sign + if (i < len && *p == '-') { + sign = -1, i++; + } else if (i < len && *p == '+') { + i++; + } + + // Decimal + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + d *= 10.0; + d += p[i] - '0'; + } + d *= sign; + + // Fractional + if (i < len && p[i] == '.') { + double frac = 0.0, base = 0.1; + i++; + for (; i < len && p[i] >= '0' && p[i] <= '9'; i++) { + frac += base * (p[i] - '0'); + base /= 10.0; + } + d += frac * sign; + } + + // Exponential + if (i < len && (p[i] == 'e' || p[i] == 'E')) { + int j, exp = 0, minus = 0; + i++; + if (i < len && p[i] == '-') minus = 1, i++; + if (i < len && p[i] == '+') i++; + while (i < len && p[i] >= '0' && p[i] <= '9' && exp < 308) + exp = exp * 10 + (p[i++] - '0'); + if (minus) exp = -exp; + for (j = 0; j < exp; j++) d *= 10.0; + for (j = 0; j < -exp; j++) d /= 10.0; + } + + if (numlen != NULL) *numlen = i; + return d; +} + +int mg_json_get(struct mg_str json, const char *path, int *toklen) { + const char *s = json.ptr; + int len = (int) json.len; + enum { S_VALUE, S_KEY, S_COLON, S_COMMA_OR_EOO } expecting = S_VALUE; + unsigned char nesting[MG_JSON_MAX_DEPTH]; + int i = 0; // Current offset in `s` + int j = 0; // Offset in `s` we're looking for (return value) + int depth = 0; // Current depth (nesting level) + int ed = 0; // Expected depth + int pos = 1; // Current position in `path` + int ci = -1, ei = -1; // Current and expected index in array + + if (toklen) *toklen = 0; + if (path[0] != '$') return MG_JSON_INVALID; + +#define MG_CHECKRET(x) \ + do { \ + if (depth == ed && path[pos] == '\0' && ci == ei) { \ + if (toklen) *toklen = i - j + 1; \ + return j; \ + } \ + } while (0) + +// In the ascii table, the distance between `[` and `]` is 2. +// Ditto for `{` and `}`. Hence +2 in the code below. +#define MG_EOO(x) \ + do { \ + if (depth == ed && ci != ei) return MG_JSON_NOT_FOUND; \ + if (c != nesting[depth - 1] + 2) return MG_JSON_INVALID; \ + depth--; \ + MG_CHECKRET(x); \ + } while (0) + + for (i = 0; i < len; i++) { + unsigned char c = ((unsigned char *) s)[i]; + if (c == ' ' || c == '\t' || c == '\n' || c == '\r') continue; + switch (expecting) { + case S_VALUE: + // p("V %s [%.*s] %d %d %d %d\n", path, pos, path, depth, ed, ci, ei); + if (depth == ed) j = i; + if (c == '{') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '.' && ci == ei) { + // If we start the object, reset array indices + ed++, pos++, ci = ei = -1; + } + nesting[depth++] = c; + expecting = S_KEY; + break; + } else if (c == '[') { + if (depth >= (int) sizeof(nesting)) return MG_JSON_TOO_DEEP; + if (depth == ed && path[pos] == '[' && ei == ci) { + ed++, pos++, ci = 0; + for (ei = 0; path[pos] != ']' && path[pos] != '\0'; pos++) { + ei *= 10; + ei += path[pos] - '0'; + } + if (path[pos] != 0) pos++; + } + nesting[depth++] = c; + break; + } else if (c == ']' && depth > 0) { // Empty array + MG_EOO(']'); + } else if (c == 't' && i + 3 < len && memcmp(&s[i], "true", 4) == 0) { + i += 3; + } else if (c == 'n' && i + 3 < len && memcmp(&s[i], "null", 4) == 0) { + i += 3; + } else if (c == 'f' && i + 4 < len && memcmp(&s[i], "false", 5) == 0) { + i += 4; + } else if (c == '-' || ((c >= '0' && c <= '9'))) { + int numlen = 0; + mg_atod(&s[i], len - i, &numlen); + i += numlen - 1; + } else if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + i += n + 1; + } else { + return MG_JSON_INVALID; + } + MG_CHECKRET('V'); + if (depth == ed && ei >= 0) ci++; + expecting = S_COMMA_OR_EOO; + break; + + case S_KEY: + if (c == '"') { + int n = mg_pass_string(&s[i + 1], len - i - 1); + if (n < 0) return n; + if (i + 1 + n >= len) return MG_JSON_NOT_FOUND; + if (depth < ed) return MG_JSON_NOT_FOUND; + if (depth == ed && path[pos - 1] != '.') return MG_JSON_NOT_FOUND; + // printf("K %s [%.*s] [%.*s] %d %d %d\n", path, pos, path, n, + // &s[i + 1], n, depth, ed); + // NOTE(cpq): in the check sequence below is important. + // strncmp() must go first: it fails fast if the remaining length of + // the path is smaller than `n`. + if (depth == ed && path[pos - 1] == '.' && + strncmp(&s[i + 1], &path[pos], (size_t) n) == 0 && + (path[pos + n] == '\0' || path[pos + n] == '.' || + path[pos + n] == '[')) { + pos += n; + } + i += n + 1; + expecting = S_COLON; + } else if (c == '}') { // Empty object + MG_EOO('}'); + expecting = S_COMMA_OR_EOO; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COLON: + if (c == ':') { + expecting = S_VALUE; + } else { + return MG_JSON_INVALID; + } + break; + + case S_COMMA_OR_EOO: + if (depth <= 0) { + return MG_JSON_INVALID; + } else if (c == ',') { + expecting = (nesting[depth - 1] == '{') ? S_KEY : S_VALUE; + } else if (c == ']' || c == '}') { + MG_EOO('O'); + if (depth == ed && ei >= 0) ci++; + } else { + return MG_JSON_INVALID; + } + break; + } + } + return MG_JSON_NOT_FOUND; +} + +bool mg_json_get_num(struct mg_str json, const char *path, double *v) { + int n, toklen, found = 0; + if ((n = mg_json_get(json, path, &toklen)) >= 0 && + (json.ptr[n] == '-' || (json.ptr[n] >= '0' && json.ptr[n] <= '9'))) { + if (v != NULL) *v = mg_atod(json.ptr + n, toklen, NULL); + found = 1; + } + return found; +} + +bool mg_json_get_bool(struct mg_str json, const char *path, bool *v) { + int found = 0, off = mg_json_get(json, path, NULL); + if (off >= 0 && (json.ptr[off] == 't' || json.ptr[off] == 'f')) { + if (v != NULL) *v = json.ptr[off] == 't'; + found = 1; + } + return found; +} + +static bool json_unescape(const char *s, size_t len, char *to, size_t n) { + size_t i, j; + for (i = 0, j = 0; i < len && j < n; i++, j++) { + if (s[i] == '\\' && i + 5 < len && s[i + 1] == 'u') { + // \uXXXX escape. We could process a simple one-byte chars + // \u00xx from the ASCII range. More complex chars would require + // dragging in a UTF8 library, which is too much for us + if (s[i + 2] != '0' || s[i + 3] != '0') return false; // Give up + ((unsigned char *) to)[j] = (unsigned char) mg_unhexn(s + i + 4, 2); + + i += 5; + } else if (s[i] == '\\' && i + 1 < len) { + char c = json_esc(s[i + 1], 0); + if (c == 0) return false; + to[j] = c; + i++; + } else { + to[j] = s[i]; + } + } + if (j >= n) return false; + if (n > 0) to[j] = '\0'; + return true; +} + +char *mg_json_get_str(struct mg_str json, const char *path) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && len > 1 && json.ptr[off] == '"') { + if ((result = (char *) calloc(1, (size_t) len)) != NULL && + !json_unescape(json.ptr + off + 1, (size_t) (len - 2), result, + (size_t) len)) { + free(result); + result = NULL; + } + } + return result; +} + +char *mg_json_get_b64(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len)) != NULL) { + int k = mg_base64_decode(json.ptr + off + 1, len - 2, result); + if (slen != NULL) *slen = k; + } + return result; +} + +char *mg_json_get_hex(struct mg_str json, const char *path, int *slen) { + char *result = NULL; + int len = 0, off = mg_json_get(json, path, &len); + if (off >= 0 && json.ptr[off] == '"' && len > 1 && + (result = (char *) calloc(1, (size_t) len / 2)) != NULL) { + mg_unhex(json.ptr + off + 1, (size_t) (len - 2), (uint8_t *) result); + result[len / 2 - 1] = '\0'; + if (slen != NULL) *slen = len / 2 - 1; + } + return result; +} + +long mg_json_get_long(struct mg_str json, const char *path, long dflt) { + double dv; + long result = dflt; + if (mg_json_get_num(json, path, &dv)) result = (long) dv; + return result; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/log.c" +#endif + + + + + +static void default_logger(char c, void *param) { + putchar(c); + (void) c, (void) param; +} + +static int s_level = MG_LL_INFO; +static mg_pfn_t s_log_func = default_logger; +static void *s_log_func_param = NULL; + +void mg_log_set_fn(mg_pfn_t fn, void *param) { + s_log_func = fn; + s_log_func_param = param; +} + +static void logc(unsigned char c) { + s_log_func((char) c, s_log_func_param); +} + +static void logs(const char *buf, size_t len) { + size_t i; + for (i = 0; i < len; i++) logc(((unsigned char *) buf)[i]); +} + +void mg_log_set(int log_level) { + MG_DEBUG(("Setting log level to %d", log_level)); + s_level = log_level; +} + +bool mg_log_prefix(int level, const char *file, int line, const char *fname) { + if (level <= s_level) { + const char *p = strrchr(file, '/'); + char buf[41]; + size_t n; + if (p == NULL) p = strrchr(file, '\\'); + n = mg_snprintf(buf, sizeof(buf), "%llx %d %s:%d:%s", mg_millis(), level, + p == NULL ? file : p + 1, line, fname); + if (n > sizeof(buf) - 2) n = sizeof(buf) - 2; + while (n < sizeof(buf)) buf[n++] = ' '; + logs(buf, n - 1); + return true; + } else { + return false; + } +} + +void mg_log(const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_vxprintf(s_log_func, s_log_func_param, fmt, &ap); + va_end(ap); + logc((unsigned char) '\n'); +} + +static unsigned char nibble(unsigned c) { + return (unsigned char) (c < 10 ? c + '0' : c + 'W'); +} + +#define ISPRINT(x) ((x) >= ' ' && (x) <= '~') +void mg_hexdump(const void *buf, size_t len) { + const unsigned char *p = (const unsigned char *) buf; + unsigned char ascii[16], alen = 0; + size_t i; + for (i = 0; i < len; i++) { + if ((i % 16) == 0) { + // Print buffered ascii chars + if (i > 0) logs(" ", 2), logs((char *) ascii, 16), logc('\n'), alen = 0; + // Print hex address, then \t + logc(nibble((i >> 12) & 15)), logc(nibble((i >> 8) & 15)), + logc(nibble((i >> 4) & 15)), logc('0'), logs(" ", 3); + } + logc(nibble(p[i] >> 4)), logc(nibble(p[i] & 15)); // Two nibbles, e.g. c5 + logc(' '); // Space after hex number + ascii[alen++] = ISPRINT(p[i]) ? p[i] : '.'; // Add to the ascii buf + } + while (alen < 16) logs(" ", 3), ascii[alen++] = ' '; + logs(" ", 2), logs((char *) ascii, 16), logc('\n'); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/md5.c" +#endif + + + +#if defined(MG_ENABLE_MD5) && MG_ENABLE_MD5 + +static void mg_byte_reverse(unsigned char *buf, unsigned longs) { + if (MG_BIG_ENDIAN) { + do { + uint32_t t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32_t *) buf = t; + buf += 4; + } while (--longs); + } else { + (void) buf, (void) longs; // Little endian. Do nothing + } +} + +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +#define MD5STEP(f, w, x, y, z, data, s) \ + (w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x) + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void mg_md5_init(mg_md5_ctx *ctx) { + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +static void mg_md5_transform(uint32_t buf[4], uint32_t const in[16]) { + uint32_t a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7); + MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12); + MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17); + MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22); + MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7); + MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12); + MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17); + MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22); + MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7); + MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12); + MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17); + MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22); + MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7); + MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12); + MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17); + MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22); + + MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5); + MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9); + MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14); + MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20); + MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5); + MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9); + MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14); + MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20); + MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5); + MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9); + MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14); + MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20); + MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5); + MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9); + MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14); + MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20); + + MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4); + MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11); + MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16); + MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23); + MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4); + MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11); + MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16); + MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23); + MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4); + MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11); + MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16); + MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23); + MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4); + MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11); + MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16); + MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23); + + MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6); + MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10); + MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15); + MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21); + MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6); + MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10); + MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15); + MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21); + MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6); + MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10); + MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15); + MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21); + MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6); + MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10); + MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15); + MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} + +void mg_md5_update(mg_md5_ctx *ctx, const unsigned char *buf, size_t len) { + uint32_t t; + + t = ctx->bits[0]; + if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++; + ctx->bits[1] += (uint32_t) len >> 29; + + t = (t >> 3) & 0x3f; + + if (t) { + unsigned char *p = (unsigned char *) ctx->in + t; + + t = 64 - t; + if (len < t) { + memcpy(p, buf, len); + return; + } + memcpy(p, buf, t); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += t; + len -= t; + } + + while (len >= 64) { + memcpy(ctx->in, buf, 64); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + buf += 64; + len -= 64; + } + + memcpy(ctx->in, buf, len); +} + +void mg_md5_final(mg_md5_ctx *ctx, unsigned char digest[16]) { + unsigned count; + unsigned char *p; + uint32_t *a; + + count = (ctx->bits[0] >> 3) & 0x3F; + + p = ctx->in + count; + *p++ = 0x80; + count = 64 - 1 - count; + if (count < 8) { + memset(p, 0, count); + mg_byte_reverse(ctx->in, 16); + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + memset(ctx->in, 0, 56); + } else { + memset(p, 0, count - 8); + } + mg_byte_reverse(ctx->in, 14); + + a = (uint32_t *) ctx->in; + a[14] = ctx->bits[0]; + a[15] = ctx->bits[1]; + + mg_md5_transform(ctx->buf, (uint32_t *) ctx->in); + mg_byte_reverse((unsigned char *) ctx->buf, 4); + memcpy(digest, ctx->buf, 16); + memset((char *) ctx, 0, sizeof(*ctx)); +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/mqtt.c" +#endif + + + + + + + + +#define MQTT_CLEAN_SESSION 0x02 +#define MQTT_HAS_WILL 0x04 +#define MQTT_WILL_RETAIN 0x20 +#define MQTT_HAS_PASSWORD 0x40 +#define MQTT_HAS_USER_NAME 0x80 + +void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags, + uint32_t len) { + uint8_t buf[1 + sizeof(len)], *vlen = &buf[1]; + buf[0] = (uint8_t) ((cmd << 4) | flags); + do { + *vlen = len % 0x80; + len /= 0x80; + if (len > 0) *vlen |= 0x80; + vlen++; + } while (len > 0 && vlen < &buf[sizeof(buf)]); + mg_send(c, buf, (size_t) (vlen - buf)); +} + +static void mg_send_u16(struct mg_connection *c, uint16_t value) { + mg_send(c, &value, sizeof(value)); +} + +void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) { + char rnd[10], client_id[21], zero = 0; + struct mg_str cid = opts->client_id; + uint32_t total_len = 7 + 1 + 2 + 2; + uint8_t hdr[8] = {0, 4, 'M', 'Q', 'T', 'T', opts->version, 0}; + + if (cid.len == 0) { + mg_random(rnd, sizeof(rnd)); + mg_hex(rnd, sizeof(rnd), client_id); + client_id[sizeof(client_id) - 1] = '\0'; + cid = mg_str(client_id); + } + + if (hdr[6] == 0) hdr[6] = 4; // If version is not set, use 4 (3.1.1) + c->is_mqtt5 = hdr[6] == 5; // Set version 5 flag + hdr[7] = (uint8_t) ((opts->will_qos & 3) << 3); // Connection flags + if (opts->user.len > 0) { + total_len += 2 + (uint32_t) opts->user.len; + hdr[7] |= MQTT_HAS_USER_NAME; + } + if (opts->pass.len > 0) { + total_len += 2 + (uint32_t) opts->pass.len; + hdr[7] |= MQTT_HAS_PASSWORD; + } + if (opts->will_topic.len > 0 && opts->will_message.len > 0) { + total_len += + 4 + (uint32_t) opts->will_topic.len + (uint32_t) opts->will_message.len; + hdr[7] |= MQTT_HAS_WILL; + } + if (opts->clean || cid.len == 0) hdr[7] |= MQTT_CLEAN_SESSION; + if (opts->will_retain) hdr[7] |= MQTT_WILL_RETAIN; + total_len += (uint32_t) cid.len; + if (c->is_mqtt5) total_len += 1U + (hdr[7] & MQTT_HAS_WILL ? 1U : 0); + + mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len); + mg_send(c, hdr, sizeof(hdr)); + // keepalive == 0 means "do not disconnect us!" + mg_send_u16(c, mg_htons((uint16_t) opts->keepalive)); + + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // V5 properties + mg_send_u16(c, mg_htons((uint16_t) cid.len)); + mg_send(c, cid.ptr, cid.len); + + if (hdr[7] & MQTT_HAS_WILL) { + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); // will props + mg_send_u16(c, mg_htons((uint16_t) opts->will_topic.len)); + mg_send(c, opts->will_topic.ptr, opts->will_topic.len); + mg_send_u16(c, mg_htons((uint16_t) opts->will_message.len)); + mg_send(c, opts->will_message.ptr, opts->will_message.len); + } + if (opts->user.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->user.len)); + mg_send(c, opts->user.ptr, opts->user.len); + } + if (opts->pass.len > 0) { + mg_send_u16(c, mg_htons((uint16_t) opts->pass.len)); + mg_send(c, opts->pass.ptr, opts->pass.len); + } +} + +void mg_mqtt_pub(struct mg_connection *c, struct mg_str topic, + struct mg_str data, int qos, bool retain) { + uint8_t flags = (uint8_t) (((qos & 3) << 1) | (retain ? 1 : 0)), zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + (uint32_t) data.len; + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) topic.len, (char *) topic.ptr, + (int) data.len, (char *) data.ptr)); + if (qos > 0) len += 2; + if (c->is_mqtt5) len++; + mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, len); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + if (qos > 0) { + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + } + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send(c, data.ptr, data.len); +} + +void mg_mqtt_sub(struct mg_connection *c, struct mg_str topic, int qos) { + uint8_t qos_ = qos & 3, zero = 0; + uint32_t len = 2 + (uint32_t) topic.len + 2 + 1 + (c->is_mqtt5 ? 1 : 0); + mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, 2, len); + if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id; + mg_send_u16(c, mg_htons(c->mgr->mqtt_id)); + if (c->is_mqtt5) mg_send(c, &zero, sizeof(zero)); + mg_send_u16(c, mg_htons((uint16_t) topic.len)); + mg_send(c, topic.ptr, topic.len); + mg_send(c, &qos_, sizeof(qos_)); +} + +int mg_mqtt_parse(const uint8_t *buf, size_t len, uint8_t version, + struct mg_mqtt_message *m) { + uint8_t lc = 0, *p, *end; + uint32_t n = 0, len_len = 0; + + memset(m, 0, sizeof(*m)); + m->dgram.ptr = (char *) buf; + if (len < 2) return MQTT_INCOMPLETE; + m->cmd = (uint8_t) (buf[0] >> 4); + m->qos = (buf[0] >> 1) & 3; + + n = len_len = 0; + p = (uint8_t *) buf + 1; + while ((size_t) (p - buf) < len) { + lc = *((uint8_t *) p++); + n += (uint32_t) ((lc & 0x7f) << 7 * len_len); + len_len++; + if (!(lc & 0x80)) break; + if (len_len >= 4) return MQTT_MALFORMED; + } + end = p + n; + if ((lc & 0x80) || (end > buf + len)) return MQTT_INCOMPLETE; + m->dgram.len = (size_t) (end - buf); + + switch (m->cmd) { + case MQTT_CMD_CONNACK: + if (end - p < 2) return MQTT_MALFORMED; + m->ack = p[1]; + break; + case MQTT_CMD_PUBACK: + case MQTT_CMD_PUBREC: + case MQTT_CMD_PUBREL: + case MQTT_CMD_PUBCOMP: + case MQTT_CMD_SUBSCRIBE: + case MQTT_CMD_SUBACK: + case MQTT_CMD_UNSUBSCRIBE: + case MQTT_CMD_UNSUBACK: + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + break; + case MQTT_CMD_PUBLISH: { + if (p + 2 > end) return MQTT_MALFORMED; + m->topic.len = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + m->topic.ptr = (char *) p + 2; + p += 2 + m->topic.len; + if (p > end) return MQTT_MALFORMED; + if (m->qos > 0) { + if (p + 2 > end) return MQTT_MALFORMED; + m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]); + p += 2; + } + if (p >= end) return MQTT_MALFORMED; + if (version == 5) p += 1 + p[0]; // Skip options + if (p > end) return MQTT_MALFORMED; + m->data.ptr = (char *) p; + m->data.len = (size_t) (end - p); + break; + } + default: + break; + } + return MQTT_OK; +} + +static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data, + void *fn_data) { + if (ev == MG_EV_READ) { + for (;;) { + uint8_t version = c->is_mqtt5 ? 5 : 4; + struct mg_mqtt_message mm; + int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, version, &mm); + if (rc == MQTT_MALFORMED) { + MG_ERROR(("%lu MQTT malformed message", c->id)); + c->is_closing = 1; + break; + } else if (rc == MQTT_OK) { + MG_VERBOSE(("%lu MQTT CMD %d len %d [%.*s]", c->id, mm.cmd, + (int) mm.dgram.len, (int) mm.data.len, mm.data.ptr)); + switch (mm.cmd) { + case MQTT_CMD_CONNACK: + mg_call(c, MG_EV_MQTT_OPEN, &mm.ack); + if (mm.ack == 0) { + MG_DEBUG(("%lu Connected", c->id)); + } else { + MG_ERROR(("%lu MQTT auth failed, code %d", c->id, mm.ack)); + c->is_closing = 1; + } + break; + case MQTT_CMD_PUBLISH: { + MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len, + mm.topic.ptr, (int) mm.data.len, mm.data.ptr)); + if (mm.qos > 0) { + uint16_t id = mg_htons(mm.id); + mg_mqtt_send_header(c, MQTT_CMD_PUBACK, 0, sizeof(id)); + mg_send(c, &id, sizeof(id)); + } + mg_call(c, MG_EV_MQTT_MSG, &mm); + break; + } + } + mg_call(c, MG_EV_MQTT_CMD, &mm); + mg_iobuf_del(&c->recv, 0, mm.dgram.len); + } else { + break; + } + } + } + (void) ev_data; + (void) fn_data; +} + +void mg_mqtt_ping(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGREQ, 0, 0); +} + +void mg_mqtt_pong(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_PINGRESP, 0, 0); +} + +void mg_mqtt_disconnect(struct mg_connection *nc) { + mg_mqtt_send_header(nc, MQTT_CMD_DISCONNECT, 0, 0); +} + +struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url, + const struct mg_mqtt_opts *opts, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); + if (c != NULL) { + struct mg_mqtt_opts empty; + memset(&empty, 0, sizeof(empty)); + mg_mqtt_login(c, opts == NULL ? &empty : opts); + c->pfn = mqtt_cb; + } + return c; +} + +struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_listen(mgr, url, fn, fn_data); + if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/net.c" +#endif + + + + + + + +size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list *ap) { + size_t old = c->send.len; + mg_vxprintf(mg_pfn_iobuf, &c->send, fmt, ap); + return c->send.len - old; +} + +size_t mg_printf(struct mg_connection *c, const char *fmt, ...) { + size_t len = 0; + va_list ap; + va_start(ap, fmt); + len = mg_vprintf(c, fmt, &ap); + va_end(ap); + return len; +} + +char *mg_straddr(struct mg_addr *a, char *buf, size_t len) { + char tmp[30]; + const char *fmt = a->is_ip6 ? "[%s]:%d" : "%s:%d"; + mg_ntoa(a, tmp, sizeof(tmp)); + mg_snprintf(buf, len, fmt, tmp, (int) mg_ntohs(a->port)); + return buf; +} + +char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) { + if (addr->is_ip6) { + uint16_t *p = (uint16_t *) addr->ip6; + mg_snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x", mg_htons(p[0]), + mg_htons(p[1]), mg_htons(p[2]), mg_htons(p[3]), mg_htons(p[4]), + mg_htons(p[5]), mg_htons(p[6]), mg_htons(p[7])); + } else { + uint8_t p[4]; + memcpy(p, &addr->ip, sizeof(p)); + mg_snprintf(buf, len, "%d.%d.%d.%d", (int) p[0], (int) p[1], (int) p[2], + (int) p[3]); + } + return buf; +} + +static bool mg_atonl(struct mg_str str, struct mg_addr *addr) { + if (mg_vcasecmp(&str, "localhost") != 0) return false; + addr->ip = mg_htonl(0x7f000001); + addr->is_ip6 = false; + return true; +} + +static bool mg_atone(struct mg_str str, struct mg_addr *addr) { + if (str.len > 0) return false; + addr->ip = 0; + addr->is_ip6 = false; + return true; +} + +static bool mg_aton4(struct mg_str str, struct mg_addr *addr) { + uint8_t data[4] = {0, 0, 0, 0}; + size_t i, num_dots = 0; + for (i = 0; i < str.len; i++) { + if (str.ptr[i] >= '0' && str.ptr[i] <= '9') { + int octet = data[num_dots] * 10 + (str.ptr[i] - '0'); + if (octet > 255) return false; + data[num_dots] = (uint8_t) octet; + } else if (str.ptr[i] == '.') { + if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false; + num_dots++; + } else { + return false; + } + } + if (num_dots != 3 || str.ptr[i - 1] == '.') return false; + memcpy(&addr->ip, data, sizeof(data)); + addr->is_ip6 = false; + return true; +} + +static bool mg_v4mapped(struct mg_str str, struct mg_addr *addr) { + int i; + if (str.len < 14) return false; + if (str.ptr[0] != ':' || str.ptr[1] != ':' || str.ptr[6] != ':') return false; + for (i = 2; i < 6; i++) { + if (str.ptr[i] != 'f' && str.ptr[i] != 'F') return false; + } + if (!mg_aton4(mg_str_n(&str.ptr[7], str.len - 7), addr)) return false; + memset(addr->ip6, 0, sizeof(addr->ip6)); + addr->ip6[10] = addr->ip6[11] = 255; + memcpy(&addr->ip6[12], &addr->ip, 4); + addr->is_ip6 = true; + return true; +} + +static bool mg_aton6(struct mg_str str, struct mg_addr *addr) { + size_t i, j = 0, n = 0, dc = 42; + if (str.len > 2 && str.ptr[0] == '[') str.ptr++, str.len -= 2; + if (mg_v4mapped(str, addr)) return true; + for (i = 0; i < str.len; i++) { + if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') || + (str.ptr[i] >= 'a' && str.ptr[i] <= 'f') || + (str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) { + unsigned long val; + if (i > j + 3) return false; + // MG_DEBUG(("%zu %zu [%.*s]", i, j, (int) (i - j + 1), &str.ptr[j])); + val = mg_unhexn(&str.ptr[j], i - j + 1); + addr->ip6[n] = (uint8_t) ((val >> 8) & 255); + addr->ip6[n + 1] = (uint8_t) (val & 255); + } else if (str.ptr[i] == ':') { + j = i + 1; + if (i > 0 && str.ptr[i - 1] == ':') { + dc = n; // Double colon + if (i > 1 && str.ptr[i - 2] == ':') return false; + } else if (i > 0) { + n += 2; + } + if (n > 14) return false; + addr->ip6[n] = addr->ip6[n + 1] = 0; // For trailing :: + } else { + return false; + } + } + if (n < 14 && dc == 42) return false; + if (n < 14) { + memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2); + memset(&addr->ip6[dc], 0, 14 - n); + } + addr->is_ip6 = true; + return true; +} + +bool mg_aton(struct mg_str str, struct mg_addr *addr) { + // MG_INFO(("[%.*s]", (int) str.len, str.ptr)); + return mg_atone(str, addr) || mg_atonl(str, addr) || mg_aton4(str, addr) || + mg_aton6(str, addr); +} + +struct mg_connection *mg_alloc_conn(struct mg_mgr *mgr) { + struct mg_connection *c = + (struct mg_connection *) calloc(1, sizeof(*c) + mgr->extraconnsize); + if (c != NULL) { + c->mgr = mgr; + c->send.align = c->recv.align = MG_IO_SIZE; + c->id = ++mgr->nextid; + } + return c; +} + +void mg_close_conn(struct mg_connection *c) { + mg_resolve_cancel(c); // Close any pending DNS query + LIST_DELETE(struct mg_connection, &c->mgr->conns, c); + if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL; + if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL; + // Order of operations is important. `MG_EV_CLOSE` event must be fired + // before we deallocate received data, see #1331 + mg_call(c, MG_EV_CLOSE, NULL); + MG_DEBUG(("%lu %p closed", c->id, c->fd)); + + mg_tls_free(c); + mg_iobuf_free(&c->recv); + mg_iobuf_free(&c->send); + memset(c, 0, sizeof(*c)); + free(c); +} + +struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if (url == NULL || url[0] == '\0') { + MG_ERROR(("null url")); + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM")); + } else { + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->is_udp = (strncmp(url, "udp:", 4) == 0); + c->fn = fn; + c->is_client = true; + c->fn_data = fn_data; + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + mg_call(c, MG_EV_OPEN, NULL); + mg_resolve(c, url); + } + return c; +} + +struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = NULL; + if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("OOM %s", url)); + } else if (!mg_open_listener(c, url)) { + MG_ERROR(("Failed: %s, errno %d", url, errno)); + free(c); + c = NULL; + } else { + c->is_listening = 1; + c->is_udp = strncmp(url, "udp:", 4) == 0; + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fn = fn; + c->fn_data = fn_data; + mg_call(c, MG_EV_OPEN, NULL); + MG_DEBUG(("%lu %p %s", c->id, c->fd, url)); + } + return c; +} + +struct mg_connection *mg_wrapfd(struct mg_mgr *mgr, int fd, + mg_event_handler_t fn, void *fn_data) { + struct mg_connection *c = mg_alloc_conn(mgr); + if (c != NULL) { + c->fd = (void *) (size_t) fd; + c->fn = fn; + c->fn_data = fn_data; + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_OPEN, NULL); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + } + return c; +} + +struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds, + unsigned flags, void (*fn)(void *), void *arg) { + struct mg_timer *t = (struct mg_timer *) calloc(1, sizeof(*t)); + if (t != NULL) { + mg_timer_init(&mgr->timers, t, milliseconds, flags, fn, arg); + t->id = mgr->timerid++; + } + return t; +} + +void mg_mgr_free(struct mg_mgr *mgr) { + struct mg_connection *c; + struct mg_timer *tmp, *t = mgr->timers; + while (t != NULL) tmp = t->next, free(t), t = tmp; + mgr->timers = NULL; // Important. Next call to poll won't touch timers + for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1; + mg_mgr_poll(mgr, 0); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_DeleteSocketSet(mgr->ss); +#endif + MG_DEBUG(("All connections closed")); +#if MG_ENABLE_EPOLL + if (mgr->epoll_fd >= 0) close(mgr->epoll_fd), mgr->epoll_fd = -1; +#endif + free(mgr->priv); +} + +void mg_mgr_init(struct mg_mgr *mgr) { + memset(mgr, 0, sizeof(*mgr)); +#if MG_ENABLE_EPOLL + if ((mgr->epoll_fd = epoll_create1(0)) < 0) MG_ERROR(("epoll: %d", errno)); +#else + mgr->epoll_fd = -1; +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + // clang-format off + { WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); } + // clang-format on +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + mgr->ss = FreeRTOS_CreateSocketSet(); +#elif defined(__unix) || defined(__unix__) || defined(__APPLE__) + // Ignore SIGPIPE signal, so if client cancels the request, it + // won't kill the whole process. + signal(SIGPIPE, SIG_IGN); +#endif + mgr->dnstimeout = 3000; + mgr->dns4.url = "udp://8.8.8.8:53"; + mgr->dns6.url = "udp://[2001:4860:4860::8888]:53"; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/rpc.c" +#endif + + +void mg_rpc_add(struct mg_rpc **head, struct mg_str method, + void (*fn)(struct mg_rpc_req *), void *fn_data) { + struct mg_rpc *rpc = (struct mg_rpc *) calloc(1, sizeof(*rpc)); + if (rpc != NULL) { + rpc->method = mg_strdup(method), rpc->fn = fn, rpc->fn_data = fn_data; + rpc->next = *head, *head = rpc; + } +} + +void mg_rpc_del(struct mg_rpc **head, void (*fn)(struct mg_rpc_req *)) { + struct mg_rpc *r; + while ((r = *head) != NULL) { + if (r->fn == fn || fn == NULL) { + *head = r->next; + free((void *) r->method.ptr); + free(r); + } else { + head = &(*head)->next; + } + } +} + +static void mg_rpc_call(struct mg_rpc_req *r, struct mg_str method) { + struct mg_rpc *h = r->head == NULL ? NULL : *r->head; + while (h != NULL && !mg_match(method, h->method, NULL)) h = h->next; + if (h != NULL) { + r->rpc = h; + h->fn(r); + } else { + mg_rpc_err(r, -32601, "\"%.*s not found\"", (int) method.len, method.ptr); + } +} + +void mg_rpc_process(struct mg_rpc_req *r) { + int len, off = mg_json_get(r->frame, "$.method", &len); + if (off > 0 && r->frame.ptr[off] == '"') { + struct mg_str method = mg_str_n(&r->frame.ptr[off + 1], (size_t) len - 2); + mg_rpc_call(r, method); + } else if ((off = mg_json_get(r->frame, "$.result", &len)) > 0 || + (off = mg_json_get(r->frame, "$.error", &len)) > 0) { + mg_rpc_call(r, mg_str("")); // JSON response! call "" method handler + } else { + mg_rpc_err(r, -32700, "%.*Q", (int) r->frame.len, r->frame.ptr); // Invalid + } +} + +void mg_rpc_vok(struct mg_rpc_req *r, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "{%Q:%.*s,%Q:", "id", len, + &r->frame.ptr[off], "result"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}"); + } +} + +void mg_rpc_ok(struct mg_rpc_req *r, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_vok(r, fmt, &ap); + va_end(ap); +} + +void mg_rpc_verr(struct mg_rpc_req *r, int code, const char *fmt, va_list *ap) { + int len, off = mg_json_get(r->frame, "$.id", &len); + mg_xprintf(r->pfn, r->pfn_data, "{"); + if (off > 0) { + mg_xprintf(r->pfn, r->pfn_data, "%Q:%.*s,", "id", len, &r->frame.ptr[off]); + } + mg_xprintf(r->pfn, r->pfn_data, "%Q:{%Q:%d,%Q:", "error", "code", code, + "message"); + mg_vxprintf(r->pfn, r->pfn_data, fmt == NULL ? "null" : fmt, ap); + mg_xprintf(r->pfn, r->pfn_data, "}}"); +} + +void mg_rpc_err(struct mg_rpc_req *r, int code, const char *fmt, ...) { + va_list ap; + va_start(ap, fmt); + mg_rpc_verr(r, code, fmt, &ap); + va_end(ap); +} + +static size_t print_methods(mg_pfn_t pfn, void *pfn_data, va_list *ap) { + struct mg_rpc *h, **head = (struct mg_rpc **) va_arg(*ap, void **); + size_t len = 0; + for (h = *head; h != NULL; h = h->next) { + len += mg_xprintf(pfn, pfn_data, "%s%.*Q", h == *head ? "" : ",", + (int) h->method.len, h->method.ptr); + } + return len; +} + +void mg_rpc_list(struct mg_rpc_req *r) { + mg_rpc_ok(r, "[%M]", print_methods, r->head); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sha1.c" +#endif +/* Copyright(c) By Steve Reid */ +/* 100% Public Domain */ + + + +union char64long16 { + unsigned char c[64]; + uint32_t l[16]; +}; + +#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) + +static uint32_t blk0(union char64long16 *block, int i) { + if (MG_BIG_ENDIAN) { + } else { + block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | + (rol(block->l[i], 8) & 0x00FF00FF); + } + return block->l[i]; +} + +/* Avoid redefine warning (ARM /usr/include/sys/ucontext.h define R0~R4) */ +#undef blk +#undef R0 +#undef R1 +#undef R2 +#undef R3 +#undef R4 + +#define blk(i) \ + (block->l[i & 15] = rol(block->l[(i + 13) & 15] ^ block->l[(i + 8) & 15] ^ \ + block->l[(i + 2) & 15] ^ block->l[i & 15], \ + 1)) +#define R0(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk0(block, i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R1(v, w, x, y, z, i) \ + z += ((w & (x ^ y)) ^ y) + blk(i) + 0x5A827999 + rol(v, 5); \ + w = rol(w, 30); +#define R2(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0x6ED9EBA1 + rol(v, 5); \ + w = rol(w, 30); +#define R3(v, w, x, y, z, i) \ + z += (((w | x) & y) | (w & x)) + blk(i) + 0x8F1BBCDC + rol(v, 5); \ + w = rol(w, 30); +#define R4(v, w, x, y, z, i) \ + z += (w ^ x ^ y) + blk(i) + 0xCA62C1D6 + rol(v, 5); \ + w = rol(w, 30); + +static void mg_sha1_transform(uint32_t state[5], + const unsigned char buffer[64]) { + uint32_t a, b, c, d, e; + union char64long16 block[1]; + + memcpy(block, buffer, 64); + a = state[0]; + b = state[1]; + c = state[2]; + d = state[3]; + e = state[4]; + R0(a, b, c, d, e, 0); + R0(e, a, b, c, d, 1); + R0(d, e, a, b, c, 2); + R0(c, d, e, a, b, 3); + R0(b, c, d, e, a, 4); + R0(a, b, c, d, e, 5); + R0(e, a, b, c, d, 6); + R0(d, e, a, b, c, 7); + R0(c, d, e, a, b, 8); + R0(b, c, d, e, a, 9); + R0(a, b, c, d, e, 10); + R0(e, a, b, c, d, 11); + R0(d, e, a, b, c, 12); + R0(c, d, e, a, b, 13); + R0(b, c, d, e, a, 14); + R0(a, b, c, d, e, 15); + R1(e, a, b, c, d, 16); + R1(d, e, a, b, c, 17); + R1(c, d, e, a, b, 18); + R1(b, c, d, e, a, 19); + R2(a, b, c, d, e, 20); + R2(e, a, b, c, d, 21); + R2(d, e, a, b, c, 22); + R2(c, d, e, a, b, 23); + R2(b, c, d, e, a, 24); + R2(a, b, c, d, e, 25); + R2(e, a, b, c, d, 26); + R2(d, e, a, b, c, 27); + R2(c, d, e, a, b, 28); + R2(b, c, d, e, a, 29); + R2(a, b, c, d, e, 30); + R2(e, a, b, c, d, 31); + R2(d, e, a, b, c, 32); + R2(c, d, e, a, b, 33); + R2(b, c, d, e, a, 34); + R2(a, b, c, d, e, 35); + R2(e, a, b, c, d, 36); + R2(d, e, a, b, c, 37); + R2(c, d, e, a, b, 38); + R2(b, c, d, e, a, 39); + R3(a, b, c, d, e, 40); + R3(e, a, b, c, d, 41); + R3(d, e, a, b, c, 42); + R3(c, d, e, a, b, 43); + R3(b, c, d, e, a, 44); + R3(a, b, c, d, e, 45); + R3(e, a, b, c, d, 46); + R3(d, e, a, b, c, 47); + R3(c, d, e, a, b, 48); + R3(b, c, d, e, a, 49); + R3(a, b, c, d, e, 50); + R3(e, a, b, c, d, 51); + R3(d, e, a, b, c, 52); + R3(c, d, e, a, b, 53); + R3(b, c, d, e, a, 54); + R3(a, b, c, d, e, 55); + R3(e, a, b, c, d, 56); + R3(d, e, a, b, c, 57); + R3(c, d, e, a, b, 58); + R3(b, c, d, e, a, 59); + R4(a, b, c, d, e, 60); + R4(e, a, b, c, d, 61); + R4(d, e, a, b, c, 62); + R4(c, d, e, a, b, 63); + R4(b, c, d, e, a, 64); + R4(a, b, c, d, e, 65); + R4(e, a, b, c, d, 66); + R4(d, e, a, b, c, 67); + R4(c, d, e, a, b, 68); + R4(b, c, d, e, a, 69); + R4(a, b, c, d, e, 70); + R4(e, a, b, c, d, 71); + R4(d, e, a, b, c, 72); + R4(c, d, e, a, b, 73); + R4(b, c, d, e, a, 74); + R4(a, b, c, d, e, 75); + R4(e, a, b, c, d, 76); + R4(d, e, a, b, c, 77); + R4(c, d, e, a, b, 78); + R4(b, c, d, e, a, 79); + state[0] += a; + state[1] += b; + state[2] += c; + state[3] += d; + state[4] += e; + /* Erase working structures. The order of operations is important, + * used to ensure that compiler doesn't optimize those out. */ + memset(block, 0, sizeof(block)); + a = b = c = d = e = 0; + (void) a; + (void) b; + (void) c; + (void) d; + (void) e; +} + +void mg_sha1_init(mg_sha1_ctx *context) { + context->state[0] = 0x67452301; + context->state[1] = 0xEFCDAB89; + context->state[2] = 0x98BADCFE; + context->state[3] = 0x10325476; + context->state[4] = 0xC3D2E1F0; + context->count[0] = context->count[1] = 0; +} + +void mg_sha1_update(mg_sha1_ctx *context, const unsigned char *data, + size_t len) { + size_t i, j; + + j = context->count[0]; + if ((context->count[0] += (uint32_t) len << 3) < j) context->count[1]++; + context->count[1] += (uint32_t) (len >> 29); + j = (j >> 3) & 63; + if ((j + len) > 63) { + memcpy(&context->buffer[j], data, (i = 64 - j)); + mg_sha1_transform(context->state, context->buffer); + for (; i + 63 < len; i += 64) { + mg_sha1_transform(context->state, &data[i]); + } + j = 0; + } else + i = 0; + memcpy(&context->buffer[j], &data[i], len - i); +} + +void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *context) { + unsigned i; + unsigned char finalcount[8], c; + + for (i = 0; i < 8; i++) { + finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >> + ((3 - (i & 3)) * 8)) & + 255); + } + c = 0200; + mg_sha1_update(context, &c, 1); + while ((context->count[0] & 504) != 448) { + c = 0000; + mg_sha1_update(context, &c, 1); + } + mg_sha1_update(context, finalcount, 8); + for (i = 0; i < 20; i++) { + digest[i] = + (unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255); + } + memset(context, '\0', sizeof(*context)); + memset(&finalcount, '\0', sizeof(finalcount)); +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sntp.c" +#endif + + + + + + +#define SNTP_TIME_OFFSET 2208988800U // (1970 - 1900) in seconds +#define SNTP_MAX_FRAC 4294967295.0 // 2 ** 32 - 1 + +static int64_t gettimestamp(const uint32_t *data) { + uint32_t sec = mg_ntohl(data[0]), frac = mg_ntohl(data[1]); + if (sec) sec -= SNTP_TIME_OFFSET; + return ((int64_t) sec) * 1000 + (int64_t) (frac / SNTP_MAX_FRAC * 1000.0); +} + +int64_t mg_sntp_parse(const unsigned char *buf, size_t len) { + int64_t res = -1; + int mode = len > 0 ? buf[0] & 7 : 0; + int version = len > 0 ? (buf[0] >> 3) & 7 : 0; + if (len < 48) { + MG_ERROR(("%s", "corrupt packet")); + } else if (mode != 4 && mode != 5) { + MG_ERROR(("%s", "not a server reply")); + } else if (buf[1] == 0) { + MG_ERROR(("%s", "server sent a kiss of death")); + } else if (version == 4 || version == 3) { + // int64_t ref = gettimestamp((uint32_t *) &buf[16]); + int64_t t0 = gettimestamp((uint32_t *) &buf[24]); + int64_t t1 = gettimestamp((uint32_t *) &buf[32]); + int64_t t2 = gettimestamp((uint32_t *) &buf[40]); + int64_t t3 = (int64_t) mg_millis(); + int64_t delta = (t3 - t0) - (t2 - t1); + MG_VERBOSE(("%lld %lld %lld %lld delta:%lld", t0, t1, t2, t3, delta)); + res = t2 + delta / 2; + } else { + MG_ERROR(("unexpected version: %d", version)); + } + return res; +} + +static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { + if (ev == MG_EV_READ) { + int64_t milliseconds = mg_sntp_parse(c->recv.buf, c->recv.len); + if (milliseconds > 0) { + MG_INFO(("%lu got time: %lld ms from epoch", c->id, milliseconds)); + mg_call(c, MG_EV_SNTP_TIME, (uint64_t *) &milliseconds); + MG_VERBOSE(("%u.%u", (unsigned) (milliseconds / 1000), + (unsigned) (milliseconds % 1000))); + } + mg_iobuf_del(&c->recv, 0, c->recv.len); // Free receive buffer + } else if (ev == MG_EV_CONNECT) { + mg_sntp_request(c); + } else if (ev == MG_EV_CLOSE) { + } + (void) fnd; + (void) evd; +} + +void mg_sntp_request(struct mg_connection *c) { + if (c->is_resolving) { + MG_ERROR(("%lu wait until resolved", c->id)); + } else { + int64_t now = (int64_t) mg_millis(); // Use int64_t, for vc98 + uint8_t buf[48] = {0}; + uint32_t *t = (uint32_t *) &buf[40]; + double frac = ((double) (now % 1000)) / 1000.0 * SNTP_MAX_FRAC; + buf[0] = (0 << 6) | (4 << 3) | 3; + t[0] = mg_htonl((uint32_t) (now / 1000) + SNTP_TIME_OFFSET); + t[1] = mg_htonl((uint32_t) frac); + mg_send(c, buf, sizeof(buf)); + } +} + +struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url, + mg_event_handler_t fn, void *fnd) { + struct mg_connection *c = NULL; + if (url == NULL) url = "udp://time.google.com:123"; + if ((c = mg_connect(mgr, url, fn, fnd)) != NULL) c->pfn = sntp_cb; + return c; +} + +#ifdef MG_ENABLE_LINES +#line 1 "src/sock.c" +#endif + + + + + + + + + + +#if MG_ENABLE_SOCKET +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK +typedef unsigned long nfds_t; +#define MG_SOCK_ERRNO WSAGetLastError() +#if defined(_MSC_VER) +#pragma comment(lib, "ws2_32.lib") +#define alloca(a) _alloca(a) +#endif +#define poll(a, b, c) WSAPoll((a), (b), (c)) +#ifndef SO_EXCLUSIVEADDRUSE +#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR)) +#endif +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP +#define MG_SOCK_ERRNO errno +typedef Socket_t SOCKET; +#define INVALID_SOCKET FREERTOS_INVALID_SOCKET +#elif MG_ARCH == MG_ARCH_TIRTOS +#define MG_SOCK_ERRNO errno +#define closesocket(x) close(x) +#else +#define MG_SOCK_ERRNO errno +#ifndef closesocket +#define closesocket(x) close(x) +#endif +#define INVALID_SOCKET (-1) +typedef int SOCKET; +#endif + +#define FD(c_) ((SOCKET) (size_t) (c_)->fd) +#define S2PTR(s_) ((void *) (size_t) (s_)) + +#ifndef MSG_NONBLOCKING +#define MSG_NONBLOCKING 0 +#endif + +#ifndef AF_INET6 +#define AF_INET6 10 +#endif + +union usa { + struct sockaddr sa; + struct sockaddr_in sin; +#if MG_ENABLE_IPV6 + struct sockaddr_in6 sin6; +#endif +}; + +static socklen_t tousa(struct mg_addr *a, union usa *usa) { + socklen_t len = sizeof(usa->sin); + memset(usa, 0, sizeof(*usa)); + usa->sin.sin_family = AF_INET; + usa->sin.sin_port = a->port; + *(uint32_t *) &usa->sin.sin_addr = a->ip; +#if MG_ENABLE_IPV6 + if (a->is_ip6) { + usa->sin.sin_family = AF_INET6; + usa->sin6.sin6_port = a->port; + memcpy(&usa->sin6.sin6_addr, a->ip6, sizeof(a->ip6)); + len = sizeof(usa->sin6); + } +#endif + return len; +} + +static void tomgaddr(union usa *usa, struct mg_addr *a, bool is_ip6) { + a->is_ip6 = is_ip6; + a->port = usa->sin.sin_port; + memcpy(&a->ip, &usa->sin.sin_addr, sizeof(a->ip)); +#if MG_ENABLE_IPV6 + if (is_ip6) { + memcpy(a->ip6, &usa->sin6.sin6_addr, sizeof(a->ip6)); + a->port = usa->sin6.sin6_port; + } +#endif +} + +static bool mg_sock_would_block(void) { + int err = MG_SOCK_ERRNO; + return err == EINPROGRESS || err == EWOULDBLOCK +#ifndef WINCE + || err == EAGAIN || err == EINTR +#endif +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + || err == WSAEINTR || err == WSAEWOULDBLOCK +#endif + ; +} + +static bool mg_sock_conn_reset(void) { + int err = MG_SOCK_ERRNO; +#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + return err == WSAECONNRESET; +#else + return err == EPIPE || err == ECONNRESET; +#endif +} + +static void setlocaddr(SOCKET fd, struct mg_addr *addr) { + union usa usa; + socklen_t n = sizeof(usa); + if (getsockname(fd, &usa.sa, &n) == 0) { + tomgaddr(&usa, addr, n != sizeof(usa.sin)); + } +} + +static void iolog(struct mg_connection *c, char *buf, long n, bool r) { + if (n == MG_IO_WAIT) { + // Do nothing + } else if (n <= 0) { + c->is_closing = 1; // Termination. Don't call mg_error(): #1529 + } else if (n > 0) { + if (c->is_hexdumping) { + union usa usa; + char t1[50], t2[50]; + socklen_t slen = sizeof(usa.sin); + struct mg_addr a; + memset(&usa, 0, sizeof(usa)); + memset(&a, 0, sizeof(a)); + if (getsockname(FD(c), &usa.sa, &slen) < 0) (void) 0; // Ignore result + tomgaddr(&usa, &a, c->rem.is_ip6); + MG_INFO(("\n-- %lu %s %s %s %s %ld", c->id, + mg_straddr(&a, t1, sizeof(t1)), r ? "<-" : "->", + mg_straddr(&c->rem, t2, sizeof(t2)), c->label, n)); + + mg_hexdump(buf, (size_t) n); + } + if (r) { + c->recv.len += (size_t) n; + mg_call(c, MG_EV_READ, &n); + } else { + mg_iobuf_del(&c->send, 0, (size_t) n); + // if (c->send.len == 0) mg_iobuf_resize(&c->send, 0); + if (c->send.len == 0) { + MG_EPOLL_MOD(c, 0); + } + mg_call(c, MG_EV_WRITE, &n); + } + } +} + +long mg_io_send(struct mg_connection *c, const void *buf, size_t len) { + long n; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen); + if (n > 0) setlocaddr(FD(c), &c->loc); + } else { + n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING); +#if MG_ARCH == MG_ARCH_RTX + if (n == BSD_EWOULDBLOCK) return MG_IO_WAIT; +#endif + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +bool mg_send(struct mg_connection *c, const void *buf, size_t len) { + if (c->is_udp) { + long n = mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p %d:%d %ld err %d", c->id, c->fd, (int) c->send.len, + (int) c->recv.len, n, MG_SOCK_ERRNO)); + iolog(c, (char *) buf, n, false); + return n > 0; + } else { + return mg_iobuf_add(&c->send, c->send.len, buf, len); + } +} + +static void mg_set_non_blocking_mode(SOCKET fd) { +#if defined(MG_CUSTOM_NONBLOCK) + MG_CUSTOM_NONBLOCK(fd); +#elif MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_RTX + unsigned long on = 1; + ioctlsocket(fd, FIONBIO, &on); +#elif MG_ARCH == MG_ARCH_FREERTOS_TCP + const BaseType_t off = 0; + if (setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off)) != 0) (void) 0; + if (setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off)) != 0) (void) 0; +#elif MG_ARCH == MG_ARCH_FREERTOS_LWIP || MG_ARCH == MG_ARCH_RTX_LWIP + lwip_fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_AZURERTOS + fcntl(fd, F_SETFL, O_NONBLOCK); +#elif MG_ARCH == MG_ARCH_TIRTOS + int val = 0; + setsockopt(fd, 0, SO_BLOCKING, &val, sizeof(val)); + int status = 0; + int res = SockStatus(fd, FDSTATUS_SEND, &status); + if (res == 0 && status > 0) { + val = status / 2; + int val_size = sizeof(val); + res = SockSet(fd, SOL_SOCKET, SO_SNDLOWAT, &val, val_size); + } +#else + fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); // Non-blocking mode + fcntl(fd, F_SETFD, FD_CLOEXEC); // Set close-on-exec +#endif +} + +bool mg_open_listener(struct mg_connection *c, const char *url) { + SOCKET fd = INVALID_SOCKET; + bool success = false; + c->loc.port = mg_htons(mg_url_port(url)); + if (!mg_aton(mg_url_host(url), &c->loc)) { + MG_ERROR(("invalid listening URL: %s", url)); + } else { + union usa usa; + socklen_t slen = tousa(&c->loc, &usa); + int on = 1, af = c->loc.is_ip6 ? AF_INET6 : AF_INET; + int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM; + int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP; + (void) on; + + if ((fd = socket(af, type, proto)) == INVALID_SOCKET) { + MG_ERROR(("socket: %d", MG_SOCK_ERRNO)); +#if ((MG_ARCH == MG_ARCH_WIN32) || (MG_ARCH == MG_ARCH_UNIX) || \ + (defined(LWIP_SOCKET) && SO_REUSE == 1)) + } else if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, + sizeof(on)) != 0) { + // 1. SO_RESUSEADDR is not enabled on Windows because the semantics of + // SO_REUSEADDR on UNIX and Windows is different. On Windows, + // SO_REUSEADDR allows to bind a socket to a port without error even + // if the port is already open by another program. This is not the + // behavior SO_REUSEADDR was designed for, and leads to hard-to-track + // failure scenarios. Therefore, SO_REUSEADDR was disabled on Windows + // unless SO_EXCLUSIVEADDRUSE is supported and set on a socket. + // 2. In case of LWIP, SO_REUSEADDR should be explicitly enabled, by + // defining + // SO_REUSE (in lwipopts.h), otherwise the code below will compile + // but won't work! (setsockopt will return EINVAL) + MG_ERROR(("reuseaddr: %d", MG_SOCK_ERRNO)); +#endif +#if MG_ARCH == MG_ARCH_WIN32 && !defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE) + } else if (setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *) &on, + sizeof(on)) != 0) { + // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" + MG_ERROR(("exclusiveaddruse: %d", MG_SOCK_ERRNO)); +#endif + } else if (bind(fd, &usa.sa, slen) != 0) { + MG_ERROR(("bind: %d", MG_SOCK_ERRNO)); + } else if ((type == SOCK_STREAM && + listen(fd, MG_SOCK_LISTEN_BACKLOG_SIZE) != 0)) { + // NOTE(lsm): FreeRTOS uses backlog value as a connection limit + // In case port was set to 0, get the real port number + MG_ERROR(("listen: %d", MG_SOCK_ERRNO)); + } else { + setlocaddr(fd, &c->loc); + mg_set_non_blocking_mode(fd); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + success = true; + } + } + if (success == false && fd != INVALID_SOCKET) closesocket(fd); + return success; +} + +long mg_io_recv(struct mg_connection *c, void *buf, size_t len) { + long n = 0; + if (c->is_udp) { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen); + if (n > 0) tomgaddr(&usa, &c->rem, slen != sizeof(usa.sin)); + } else { + n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING); + } + if (n < 0 && mg_sock_would_block()) return MG_IO_WAIT; + if (n < 0 && mg_sock_conn_reset()) return MG_IO_RESET; + if (n <= 0) return MG_IO_ERR; + return n; +} + +// NOTE(lsm): do only one iteration of reads, cause some systems +// (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data +static void read_conn(struct mg_connection *c) { + long n = -1; + if (c->recv.len >= MG_MAX_RECV_SIZE) { + mg_error(c, "max_recv_buf_size reached"); + } else if (c->recv.size <= c->recv.len && + !mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE)) { + mg_error(c, "oom"); + } else { + char *buf = (char *) &c->recv.buf[c->recv.len]; + size_t len = c->recv.size - c->recv.len; + n = c->is_tls ? mg_tls_recv(c, buf, len) : mg_io_recv(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, true); + } +} + +static void write_conn(struct mg_connection *c) { + char *buf = (char *) c->send.buf; + size_t len = c->send.len; + long n = c->is_tls ? mg_tls_send(c, buf, len) : mg_io_send(c, buf, len); + MG_DEBUG(("%lu %p snd %ld/%ld rcv %ld/%ld n=%ld err=%d", c->id, c->fd, + (long) c->send.len, (long) c->send.size, (long) c->recv.len, + (long) c->recv.size, n, MG_SOCK_ERRNO)); + iolog(c, buf, n, false); +} + +static void close_conn(struct mg_connection *c) { + if (FD(c) != INVALID_SOCKET) { +#if MG_ENABLE_EPOLL + epoll_ctl(c->mgr->epoll_fd, EPOLL_CTL_DEL, FD(c), NULL); +#endif + closesocket(FD(c)); +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL); +#endif + } + mg_close_conn(c); +} + +static void connect_conn(struct mg_connection *c) { + union usa usa; + socklen_t n = sizeof(usa); + // Use getpeername() to test whether we have connected + if (getpeername(FD(c), &usa.sa, &n) == 0) { + c->is_connecting = 0; + mg_call(c, MG_EV_CONNECT, NULL); + MG_EPOLL_MOD(c, 0); + if (c->is_tls_hs) mg_tls_handshake(c); + } else { + mg_error(c, "socket error"); + } +} + +static void setsockopts(struct mg_connection *c) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_AZURERTOS || \ + MG_ARCH == MG_ARCH_TIRTOS + (void) c; +#else + int on = 1; +#if !defined(SOL_TCP) +#define SOL_TCP IPPROTO_TCP +#endif + if (setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) != 0) + (void) 0; + if (setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) != + 0) + (void) 0; +#endif +} + +void mg_connect_resolved(struct mg_connection *c) { + int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM; + int rc, af = c->rem.is_ip6 ? AF_INET6 : AF_INET; // c->rem has resolved IP + c->fd = S2PTR(socket(af, type, 0)); // Create outbound socket + c->is_resolving = 0; // Clear resolving flag + if (FD(c) == INVALID_SOCKET) { + mg_error(c, "socket(): %d", MG_SOCK_ERRNO); + } else if (c->is_udp) { + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + mg_call(c, MG_EV_CONNECT, NULL); + } else { + union usa usa; + socklen_t slen = tousa(&c->rem, &usa); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + MG_EPOLL_ADD(c); + mg_call(c, MG_EV_RESOLVE, NULL); + if ((rc = connect(FD(c), &usa.sa, slen)) == 0) { + mg_call(c, MG_EV_CONNECT, NULL); + } else if (mg_sock_would_block()) { + MG_DEBUG(("%lu %p -> %x:%hu pend", c->id, c->fd, mg_ntohl(c->rem.ip), + mg_ntohs(c->rem.port))); + c->is_connecting = 1; + } else { + mg_error(c, "connect: %d", MG_SOCK_ERRNO); + } + } +} + +static SOCKET raccept(SOCKET sock, union usa *usa, socklen_t len) { + SOCKET s = INVALID_SOCKET; + do { + memset(usa, 0, sizeof(*usa)); + s = accept(sock, &usa->sa, &len); + } while (s == INVALID_SOCKET && errno == EINTR); + return s; +} + +static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) { + struct mg_connection *c = NULL; + union usa usa; + socklen_t sa_len = sizeof(usa); + SOCKET fd = raccept(FD(lsn), &usa, sa_len); + if (fd == INVALID_SOCKET) { +#if MG_ARCH == MG_ARCH_AZURERTOS + // AzureRTOS, in non-block socket mode can mark listening socket readable + // even it is not. See comment for 'select' func implementation in + // nx_bsd.c That's not an error, just should try later + if (MG_SOCK_ERRNO != EAGAIN) +#endif + MG_ERROR(("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO)); +#if (MG_ARCH != MG_ARCH_WIN32) && (MG_ARCH != MG_ARCH_FREERTOS_TCP) && \ + (MG_ARCH != MG_ARCH_TIRTOS) && !(MG_ENABLE_POLL) + } else if ((long) fd >= FD_SETSIZE) { + MG_ERROR(("%ld > %ld", (long) fd, (long) FD_SETSIZE)); + closesocket(fd); +#endif + } else if ((c = mg_alloc_conn(mgr)) == NULL) { + MG_ERROR(("%lu OOM", lsn->id)); + closesocket(fd); + } else { + // char buf[40]; + tomgaddr(&usa, &c->rem, sa_len != sizeof(usa.sin)); + // mg_straddr(&c->rem, buf, sizeof(buf)); + LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); + c->fd = S2PTR(fd); + MG_EPOLL_ADD(c); + mg_set_non_blocking_mode(FD(c)); + setsockopts(c); + c->is_accepted = 1; + c->is_hexdumping = lsn->is_hexdumping; + c->loc = lsn->loc; + c->pfn = lsn->pfn; + c->pfn_data = lsn->pfn_data; + c->fn = lsn->fn; + c->fn_data = lsn->fn_data; + MG_DEBUG(("%lu %p accepted %x.%hu -> %x.%hu", c->id, c->fd, + mg_ntohl(c->rem.ip), mg_ntohs(c->rem.port), mg_ntohl(c->loc.ip), + mg_ntohs(c->loc.port))); + mg_call(c, MG_EV_OPEN, NULL); + mg_call(c, MG_EV_ACCEPT, NULL); + } +} + +static bool mg_socketpair(SOCKET sp[2], union usa usa[2], bool udp) { + SOCKET sock; + socklen_t n = sizeof(usa[0].sin); + bool success = false; + + sock = sp[0] = sp[1] = INVALID_SOCKET; + (void) memset(&usa[0], 0, sizeof(usa[0])); + usa[0].sin.sin_family = AF_INET; + *(uint32_t *) &usa->sin.sin_addr = mg_htonl(0x7f000001U); // 127.0.0.1 + usa[1] = usa[0]; + + if (udp && (sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + (sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && + bind(sp[0], &usa[0].sa, n) == 0 && bind(sp[1], &usa[1].sa, n) == 0 && + getsockname(sp[0], &usa[0].sa, &n) == 0 && + getsockname(sp[1], &usa[1].sa, &n) == 0 && + connect(sp[0], &usa[1].sa, n) == 0 && + connect(sp[1], &usa[0].sa, n) == 0) { + success = true; + } else if (!udp && + (sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + bind(sock, &usa[0].sa, n) == 0 && + listen(sock, MG_SOCK_LISTEN_BACKLOG_SIZE) == 0 && + getsockname(sock, &usa[0].sa, &n) == 0 && + (sp[0] = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET && + connect(sp[0], &usa[0].sa, n) == 0 && + (sp[1] = raccept(sock, &usa[1], n)) != INVALID_SOCKET) { + success = true; + } + if (success) { + mg_set_non_blocking_mode(sp[1]); + } else { + if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); + if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } + if (sock != INVALID_SOCKET) closesocket(sock); + return success; +} + +int mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn, void *fn_data, + bool udp) { + union usa usa[2]; + SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET}; + struct mg_connection *c = NULL; + if (!mg_socketpair(sp, usa, udp)) { + MG_ERROR(("Cannot create socket pair")); + } else if ((c = mg_wrapfd(mgr, (int) sp[1], fn, fn_data)) == NULL) { + closesocket(sp[0]); + closesocket(sp[1]); + sp[0] = sp[1] = INVALID_SOCKET; + } else { + tomgaddr(&usa[0], &c->rem, false); + MG_DEBUG(("%lu %p pipe %lu", c->id, c->fd, (unsigned long) sp[0])); + } + return (int) sp[0]; +} + +static bool can_read(const struct mg_connection *c) { + return c->is_full == false; +} + +static bool can_write(const struct mg_connection *c) { + return c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0); +} + +static bool skip_iotest(const struct mg_connection *c) { + return (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) || + (can_read(c) == false && can_write(c) == false); +} + +static void mg_iotest(struct mg_mgr *mgr, int ms) { +#if MG_ARCH == MG_ARCH_FREERTOS_TCP + struct mg_connection *c; + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + if (can_read(c)) + FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_READ | eSELECT_EXCEPT); + if (can_write(c)) FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_WRITE); + } + FreeRTOS_select(mgr->ss, pdMS_TO_TICKS(ms)); + for (c = mgr->conns; c != NULL; c = c->next) { + EventBits_t bits = FreeRTOS_FD_ISSET(c->fd, mgr->ss); + c->is_readable = bits & (eSELECT_READ | eSELECT_EXCEPT) ? 1 : 0; + c->is_writable = bits & eSELECT_WRITE ? 1 : 0; + FreeRTOS_FD_CLR(c->fd, mgr->ss, + eSELECT_READ | eSELECT_EXCEPT | eSELECT_WRITE); + } +#elif MG_ENABLE_EPOLL + size_t max = 1; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (mg_tls_pending(c) > 0) ms = 1, c->is_readable = 1; + if (can_write(c)) MG_EPOLL_MOD(c, 1); + max++; + } + struct epoll_event *evs = (struct epoll_event *) alloca(max * sizeof(evs[0])); + int n = epoll_wait(mgr->epoll_fd, evs, (int) max, ms); + for (int i = 0; i < n; i++) { + struct mg_connection *c = (struct mg_connection *) evs[i].data.ptr; + if (evs[i].events & EPOLLERR) { + mg_error(c, "socket error"); + } else if (c->is_readable == 0) { + bool rd = evs[i].events & (EPOLLIN | EPOLLHUP); + bool wr = evs[i].events & EPOLLOUT; + c->is_readable = can_read(c) && rd ? 1U : 0; + c->is_writable = can_write(c) && wr ? 1U : 0; + } + } + (void) skip_iotest; +#elif MG_ENABLE_POLL + nfds_t n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) n++; + struct pollfd *fds = (struct pollfd *) alloca(n * sizeof(fds[0])); + memset(fds, 0, n * sizeof(fds[0])); + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + ms = 1; // Don't wait if TLS is ready + } else { + fds[n].fd = FD(c); + if (can_read(c)) fds[n].events |= POLLIN; + if (can_write(c)) fds[n].events |= POLLOUT; + n++; + } + } + + // MG_INFO(("poll n=%d ms=%d", (int) n, ms)); + if (poll(fds, n, ms) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (n == 0) Sleep(ms); // On Windows, poll fails if no sockets +#endif + memset(fds, 0, n * sizeof(fds[0])); + } + n = 0; + for (struct mg_connection *c = mgr->conns; c != NULL; c = c->next) { + if (skip_iotest(c)) { + // Socket not valid, ignore + } else if (mg_tls_pending(c) > 0) { + c->is_readable = 1; + } else { + if (fds[n].revents & POLLERR) { + mg_error(c, "socket error"); + } else { + c->is_readable = + (unsigned) (fds[n].revents & (POLLIN | POLLHUP) ? 1 : 0); + c->is_writable = (unsigned) (fds[n].revents & POLLOUT ? 1 : 0); + } + n++; + } + } +#else + struct timeval tv = {ms / 1000, (ms % 1000) * 1000}, tv_zero = {0, 0}; + struct mg_connection *c; + fd_set rset, wset, eset; + SOCKET maxfd = 0; + int rc; + + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + for (c = mgr->conns; c != NULL; c = c->next) { + c->is_readable = c->is_writable = 0; + if (skip_iotest(c)) continue; + FD_SET(FD(c), &eset); + if (can_read(c)) FD_SET(FD(c), &rset); + if (can_write(c)) FD_SET(FD(c), &wset); + if (mg_tls_pending(c) > 0) tv = tv_zero; + if (FD(c) > maxfd) maxfd = FD(c); + } + + if ((rc = select((int) maxfd + 1, &rset, &wset, &eset, &tv)) < 0) { +#if MG_ARCH == MG_ARCH_WIN32 + if (maxfd == 0) Sleep(ms); // On Windows, select fails if no sockets +#else + MG_ERROR(("select: %d %d", rc, MG_SOCK_ERRNO)); +#endif + FD_ZERO(&rset); + FD_ZERO(&wset); + FD_ZERO(&eset); + } + + for (c = mgr->conns; c != NULL; c = c->next) { + if (FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &eset)) { + mg_error(c, "socket error"); + } else { + c->is_readable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset); + c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset); + if (mg_tls_pending(c) > 0) c->is_readable = 1; + } + } +#endif +} + +void mg_mgr_poll(struct mg_mgr *mgr, int ms) { + struct mg_connection *c, *tmp; + uint64_t now; + + mg_iotest(mgr, ms); + now = mg_millis(); + mg_timer_poll(&mgr->timers, now); + + for (c = mgr->conns; c != NULL; c = tmp) { + bool is_resp = c->is_resp; + tmp = c->next; + mg_call(c, MG_EV_POLL, &now); + if (is_resp && !c->is_resp) { + long n = 0; + mg_call(c, MG_EV_READ, &n); + } + MG_VERBOSE(("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-', + c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't', + c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h', + c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c')); + if (c->is_resolving || c->is_closing) { + // Do nothing + } else if (c->is_listening && c->is_udp == 0) { + if (c->is_readable) accept_conn(mgr, c); + } else if (c->is_connecting) { + if (c->is_readable || c->is_writable) connect_conn(c); + } else if (c->is_tls_hs) { + if ((c->is_readable || c->is_writable)) mg_tls_handshake(c); + } else { + if (c->is_readable) read_conn(c); + if (c->is_writable) write_conn(c); + } + + if (c->is_draining && c->send.len == 0) c->is_closing = 1; + if (c->is_closing) close_conn(c); + } +} +#endif + +#ifdef MG_ENABLE_LINES +#line 1 "src/ssi.c" +#endif + + + + +#ifndef MG_MAX_SSI_DEPTH +#define MG_MAX_SSI_DEPTH 5 +#endif + +#ifndef MG_SSI_BUFSIZ +#define MG_SSI_BUFSIZ 1024 +#endif + +#if MG_ENABLE_SSI +static char *mg_ssi(const char *path, const char *root, int depth) { + struct mg_iobuf b = {NULL, 0, 0, MG_IO_SIZE}; + FILE *fp = fopen(path, "rb"); + if (fp != NULL) { + char buf[MG_SSI_BUFSIZ], arg[sizeof(buf)]; + int ch, intag = 0; + size_t len = 0; + buf[0] = arg[0] = '\0'; + while ((ch = fgetc(fp)) != EOF) { + if (intag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') { + buf[len++] = (char) (ch & 0xff); + buf[len] = '\0'; + if (sscanf(buf, "