// Copyright (c) 2004-2013 Sergey Lyubka // Copyright (c) 2013-2020 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 . // // 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 . #include "mongoose.h" #ifdef MG_ENABLE_LINES #line 1 "src/private.h" #endif void mg_connect_resolved(struct mg_connection *); #if MG_ARCH == MG_ARCH_FREERTOS static inline void *mg_calloc(int cnt, size_t size) { void *p = pvPortMalloc(size); if (p != NULL) memset(p, 0, size); return p; } #define calloc(a, b) mg_calloc((a), (b)) #define malloc(a) pvPortMalloc(a) #define free(a) vPortFree(a) #endif #ifdef MG_ENABLE_LINES #line 1 "src/base64.c" #endif #include 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) { unsigned char rem = (n & 3) % 3; if (rem == 0) { to[n] = mg_b64idx(ch >> 2); to[++n] = (ch & 3) << 4; } else if (rem == 1) { to[n] = mg_b64idx(to[n] | (ch >> 4)); to[++n] = (ch & 15) << 2; } else { to[n] = mg_b64idx(to[n] | (ch >> 6)); to[++n] = 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 + n; int len = 0; while (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++] = (a << 2) | (b >> 4); if (src[2] != '=') { dst[len++] = (b << 4) | (c >> 2); if (src[3] != '=') dst[len++] = (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; unsigned long expire; uint16_t txnid; }; static struct dns_data *s_reqs; // Active DNS requests static void mg_sendnsreq(struct mg_connection *, struct mg_str *, int, struct mg_dns *, bool); static void mg_dns_free(struct dns_data *d) { LIST_DELETE(struct dns_data, &s_reqs, d); free(d); } void mg_resolve_cancel(struct mg_connection *c) { struct dns_data *tmp, *d; for (d = s_reqs; d != NULL; d = tmp) { tmp = d->next; if (d->c == c) mg_dns_free(d); } } static size_t mg_dns_parse_name_depth(const uint8_t *s, size_t len, size_t ofs, char *to, size_t tolen, int depth) { size_t i = 0, j = 0; if (tolen > 0) to[0] = '\0'; if (depth > 5) return 0; 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 if (ptr + 1 < len && (s[ptr] & 0xc0) == 0 && mg_dns_parse_name_depth(s, len, ptr, to, tolen, 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 } if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term return i; } 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); } 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 struct mg_dns_header *h = (struct mg_dns_header *) buf; const uint8_t *s = buf + ofs, *e = &buf[len]; memset(rr, 0, sizeof(*rr)); if (len < sizeof(*h)) return 0; // Too small, headers dont fit if (len > 512) return 0; // Too large, we don't expect that if (s >= e) return 0; // Overflow if ((rr->nlen = mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0) return 0; // LOG(LL_INFO, ("%zu %zu %hu %d", ofs, len, rr->nlen, is_question)); s += rr->nlen + 4; if (s > e) return 0; rr->atype = ((uint16_t) s[-4] << 8) | s[-3]; rr->aclass = ((uint16_t) s[-2] << 8) | s[-1]; if (is_question) return rr->nlen + 4; s += 6; if (s > e) return 0; rr->alen = ((uint16_t) s[-2] << 8) | s[-1]; if (s + rr->alen > e) return 0; return 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; // LOG(LL_INFO, ("Q %zu %zu", ofs, n)); ofs += n; } for (i = 0; i < mg_ntohs(h->num_answers); i++) { // LOG(LL_INFO, ("A -- %zu %zu %s", ofs, n, dm->name)); if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false; mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name)); LOG(LL_INFO, ("A %zu %zu %s", ofs, n, 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) { unsigned long now = *(unsigned long *) ev_data; for (d = (struct dns_data *) fn_data; d != NULL; d = tmp) { tmp = d->next; // LOG(LL_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) { char *s = mg_hexdump(c->recv.buf, c->recv.len); LOG(LL_ERROR, ("Unexpected DNS response:\n%s\n", s)); free(s); } else { LOG(LL_VERBOSE_DEBUG, ("%s %d", dm.name, dm.resolved)); for (d = s_reqs; d != NULL; d = tmp) { tmp = d->next; // LOG(LL_INFO, ("d %p %hu %hu", d, d->txnid, dm.txnid)); if (dm.txnid != d->txnid) continue; if (d->c->is_resolving) { d->c->is_resolving = 0; if (dm.resolved) { dm.addr.port = d->c->peer.port; // Save port d->c->peer = dm.addr; // Copy resolved address mg_connect_resolved(d->c); #if MG_ENABLE_IPV6 } else if (dm.addr.is_ip6 == false && dm.name[0] != '\0') { 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 { LOG(LL_ERROR, ("%lu already resolved", d->c->id)); } mg_dns_free(d); resolved = 1; } } if (!resolved) LOG(LL_ERROR, ("stray DNS reply")); c->recv.len = 0; } else if (ev == MG_EV_CLOSE) { for (d = s_reqs; d != NULL; d = tmp) { tmp = d->next; mg_dns_free(d); } } } void 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; mg_send(c, &pkt, sizeof(pkt.header) + n); #if 0 // Immediately after A query, send AAAA query. Whatever reply comes first, // we'll use it. Note: we cannot send two queries in a single packet. // https://stackoverflow.com/questions/4082081/requesting-a-and-aaaa-records-in-single-dns-query pkt.data[n - 3] = 0x1c; // AAAA query mg_send(c, &pkt, sizeof(pkt.header) + n); #endif } 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; snprintf(dnsc->c->label, sizeof(dnsc->c->label), "%s", "DNS"); // 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 { d->txnid = s_reqs ? s_reqs->txnid + 1 : 1; d->next = s_reqs; s_reqs = d; d->expire = mg_millis() + ms; d->c = c; c->is_resolving = 1; LOG(LL_DEBUG, ("%lu resolving %.*s, txnid %hu", c->id, (int) name->len, name->ptr, d->txnid)); mg_dns_send(dnsc->c, name, d->txnid, ipv6); } } void mg_resolve(struct mg_connection *c, struct mg_str *name, int ms) { if (mg_aton(*name, &c->peer)) { // name is an IP address, do not fire name resolution mg_connect_resolved(c); } else { // name is not an IP, send DNS resolution request mg_sendnsreq(c, name, ms, &c->mgr->dns4, false); } } #ifdef MG_ENABLE_LINES #line 1 "src/event.c" #endif void mg_call(struct mg_connection *c, int ev, void *ev_data) { if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data); if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data); } void mg_error(struct mg_connection *c, const char *fmt, ...) { char mem[256], *buf = mem; va_list ap; va_start(ap, fmt); mg_vasprintf(&buf, sizeof(mem), fmt, ap); va_end(ap); LOG(LL_ERROR, ("%lu %s", c->id, buf)); mg_call(c, MG_EV_ERROR, buf); if (buf != mem) free(buf); c->is_closing = 1; } #ifdef MG_ENABLE_LINES #line 1 "src/http.c" #endif struct http_data { void *old_pfn_data; // Previous pfn_data FILE *fp; // For static file serving }; // Multipart POST example: // https://gist.github.com/cpq/b8dd247571e6ee9c54ef7e8dfcfecf48 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) { size_t 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 < u.len; i++) n = mg_base64_update(u.ptr[i], buf, n); if (p.len > 0) { n = mg_base64_update(':', buf, n); for (i = 0; i < p.len; i++) n = mg_base64_update(p.ptr[i], buf, n); } n = mg_base64_final(buf, n); c->send.len += 21 + n + 2; memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2); } else { LOG(LL_ERROR, ("%lu %s cannot resize iobuf %d->%d ", c->id, c->label, (int) c->send.size, (int) need)); } } int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst, int dst_len) { const char *p, *e, *s; size_t name_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 { name_len = strlen(name); e = buf->ptr + buf->len; len = -4; // Name does not exist dst[0] = '\0'; for (p = buf->ptr; p + name_len < e; p++) { if ((p == buf->ptr || p[-1] == '&') && p[name_len] == '=' && !mg_ncasecmp(name, p, name_len)) { p += name_len + 1; s = (const char *) memchr(p, '&', (size_t)(e - p)); if (s == NULL) s = e; len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1); if (len == -1) len = -3; // Failed to decode break; } } } return len; } 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 && isxdigit(*(const unsigned char *) (src + i + 1)) && isxdigit(*(const unsigned char *) (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 ? (int) j : -1; } 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 (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128) 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 *end, const char *delims, struct mg_str *v) { v->ptr = s; while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++; v->len = s - v->ptr; while (s < end && strchr(delims, *(unsigned char *) 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; } 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; // LOG(LL_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 + req_len, *qs; struct mg_str *cl; memset(hm, 0, sizeof(*hm)); if (req_len <= 0) return req_len; hm->message.ptr = s; hm->body.ptr = s + req_len; 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); if (hm->uri.ptr <= hm->method.ptr || hm->proto.ptr <= hm->uri.ptr) 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 = &hm->uri.ptr[hm->uri.len] - (qs + 1); hm->uri.len = 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 = 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 = 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 = req_len; } return req_len; } static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt, va_list ap) { char mem[256], *buf = mem; int len = mg_vasprintf(&buf, sizeof(mem), fmt, ap); mg_printf(c, "%X\r\n", len); mg_send(c, buf, len); mg_send(c, "\r\n", 2); if (buf != mem) free(buf); } 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, "%X\r\n", len); mg_send(c, buf, len); mg_send(c, "\r\n", 2); } void mg_http_reply(struct mg_connection *c, int code, const char *headers, const char *fmt, ...) { char mem[100], *buf = mem; va_list ap; int len; va_start(ap, fmt); len = mg_vasprintf(&buf, sizeof(mem), fmt, ap); va_end(ap); mg_printf(c, "HTTP/1.1 %d OK\r\n%sContent-Length: %d\r\n\r\n", code, headers == NULL ? "" : headers, len); mg_send(c, buf, len); if (buf != mem) free(buf); } #if MG_ENABLE_FS static void http_cb(struct mg_connection *, int, void *, void *); static void restore_http_cb(struct mg_connection *c) { struct http_data *d = (struct http_data *) c->pfn_data; if (d->fp != NULL) fclose(d->fp); c->pfn_data = d->old_pfn_data; c->pfn = http_cb; free(d); } char *mg_http_etag(char *buf, size_t len, struct stat *st) { snprintf(buf, len, "\"%lx.%lu\"", (unsigned long) st->st_mtime, (unsigned long) st->st_size); return buf; } int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm, const char *dir) { char offset[40] = "", name[200] = "", path[256]; mg_http_get_var(&hm->query, "offset", offset, sizeof(offset)); mg_http_get_var(&hm->query, "name", name, sizeof(name)); if (name[0] == '\0') { mg_http_reply(c, 400, "", "%s", "name required"); return -1; } else { FILE *fp; size_t oft = strtoul(offset, NULL, 0); snprintf(path, sizeof(path), "%s%c%s", dir, MG_DIRSEP, name); LOG(LL_DEBUG, ("%p %d bytes @ %d [%s]", c->fd, (int) hm->body.len, (int) oft, name)); if ((fp = fopen(path, oft == 0 ? "wb" : "a")) == NULL) { mg_http_reply(c, 400, "", "fopen(%s): %d", name, errno); return -2; } else { fwrite(hm->body.ptr, 1, hm->body.len, fp); fclose(fp); mg_http_reply(c, 200, "", ""); return hm->body.len; } } } 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 http_data *d = (struct http_data *) fn_data; // Read to send IO buffer directly, avoid extra on-stack buffer size_t n, max = 2 * MG_IO_SIZE; if (c->send.size < max) mg_iobuf_resize(&c->send, max); if (c->send.len >= c->send.size) return; // Rate limit n = fread(c->send.buf + c->send.len, 1, c->send.size - c->send.len, d->fp); if (n > 0) c->send.len += n; if (c->send.len < c->send.size) restore_http_cb(c); } else if (ev == MG_EV_CLOSE) { restore_http_cb(c); } (void) ev_data; } static const char *guess_content_type(const char *filename) { size_t n = strlen(filename); #define MIME_ENTRY(_ext, _type) \ { _ext, sizeof(_ext) - 1, _type } const struct { const char *ext; size_t ext_len; const char *type; } * t, types[] = { MIME_ENTRY("html", "text/html"), MIME_ENTRY("htm", "text/html"), MIME_ENTRY("shtml", "text/html"), MIME_ENTRY("css", "text/css"), MIME_ENTRY("js", "text/javascript"), MIME_ENTRY("mjs", "text/javascript"), MIME_ENTRY("json", "application/json"), MIME_ENTRY("ico", "image/x-icon"), MIME_ENTRY("gif", "image/gif"), MIME_ENTRY("jpg", "image/jpeg"), MIME_ENTRY("jpeg", "image/jpeg"), MIME_ENTRY("png", "image/png"), MIME_ENTRY("svg", "image/svg+xml"), MIME_ENTRY("txt", "text/plain"), MIME_ENTRY("wav", "audio/wav"), MIME_ENTRY("mp3", "audio/mpeg"), MIME_ENTRY("mid", "audio/mid"), MIME_ENTRY("ogg", "application/ogg"), MIME_ENTRY("xml", "application/xml"), MIME_ENTRY("ttf", "font/ttf"), MIME_ENTRY("json", "application/json"), MIME_ENTRY("xsl", "application/xml"), MIME_ENTRY("doc", "application/msword"), MIME_ENTRY("exe", "application/octet-stream"), MIME_ENTRY("zip", "application/zip"), MIME_ENTRY("xls", "application/excel"), MIME_ENTRY("tgz", "application/tar-gz"), MIME_ENTRY("tar", "application/tar"), MIME_ENTRY("gz", "application/gzip"), MIME_ENTRY("rar", "application/rar"), MIME_ENTRY("rtf", "application/rtf"), MIME_ENTRY("pdf", "application/pdf"), MIME_ENTRY("mpg", "video/mpeg"), MIME_ENTRY("webm", "video/webm"), MIME_ENTRY("mpeg", "video/mpeg"), MIME_ENTRY("mov", "video/quicktime"), MIME_ENTRY("mp4", "video/mp4"), MIME_ENTRY("avi", "video/x-msvideo"), MIME_ENTRY("csv", "text/csv"), MIME_ENTRY("bmp", "image/bmp"), MIME_ENTRY("bin", "application/octet-stream"), MIME_ENTRY("wasm", "application/wasm"), {NULL, 0, NULL}, }; for (t = types; t->ext != NULL; t++) { if (n < t->ext_len + 2) continue; if (mg_ncasecmp(t->ext, &filename[n - t->ext_len], t->ext_len)) continue; return t->type; } return "text/plain"; } void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm, const char *path, const char *mime) { struct mg_str *inm = mg_http_get_header(hm, "If-None-Match"); struct stat st; FILE *fp = fopen(path, "rb"); char etag[64]; if (fp == NULL || stat(path, &st) != 0 || mg_http_etag(etag, sizeof(etag), &st) != etag) { mg_http_reply(c, 404, "", "%s", "Not found\n"); } else if (inm != NULL && mg_vcasecmp(inm, etag) == 0) { mg_printf(c, "HTTP/1.1 304 Not Modified\r\nContent-Length: 0\r\n\r\n"); } else { mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Type: %s\r\n" "Etag: %s\r\nContent-Length: %lu\r\n\r\n", mime, etag, (unsigned long) st.st_size); if (mg_vcasecmp(&hm->method, "HEAD") == 0) { fclose(fp); } else { struct http_data *d = (struct http_data *) calloc(1, sizeof(*d)); d->fp = fp; d->old_pfn_data = c->pfn_data; c->pfn = static_cb; c->pfn_data = d; } } } #if MG_ARCH == MG_ARCH_ESP32 || MG_ARCH == MG_ARCH_ESP8266 || \ MG_ARCH == MG_ARCH_FREERTOS char *realpath(const char *src, char *dst) { int len = strlen(src); if (len > PATH_MAX - 1) len = PATH_MAX - 1; strncpy(dst, src, len); dst[len] = '\0'; return dst; } #endif // Try to avoid dirent API static int mg_is_dir(const char *path) { #if MG_ARCH == MG_ARCH_FREERTOS struct FF_STAT st; return (ff_stat(path, &st) == 0) && (st.st_mode & FF_IFDIR); #else struct stat st; return (stat(path, &st) == 0) && (st.st_mode & S_IFDIR); #endif } #if MG_ENABLE_DIRECTORY_LISTING #ifdef _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 *) malloc(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 printdirentry(struct mg_connection *c, struct mg_http_message *hm, const char *name, struct stat *stp) { char size[64], mod[64]; //, path[PATH_MAX]; int is_dir = S_ISDIR(stp->st_mode); const char *slash = is_dir ? "/" : ""; if (is_dir) { snprintf(size, sizeof(size), "%s", "[DIR]"); } else { if (stp->st_size < 1024) { snprintf(size, sizeof(size), "%d", (int) stp->st_size); } else if (stp->st_size < 0x100000) { snprintf(size, sizeof(size), "%.1fk", (double) stp->st_size / 1024.0); } else if (stp->st_size < 0x40000000) { snprintf(size, sizeof(size), "%.1fM", (double) stp->st_size / 1048576); } else { snprintf(size, sizeof(size), "%.1fG", (double) stp->st_size / 1073741824); } } strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime)); // mg_escape(file_name, path, sizeof(path)); // href = mg_url_encode(mg_mk_str(file_name)); mg_http_printf_chunk( c, "%s%s%s%s", (int) hm->uri.len, hm->uri.ptr, name, slash, name, slash, mod, size); // free((void *) href.p); } static void listdir(struct mg_connection *c, struct mg_http_message *hm, char *dir) { char path[PATH_MAX + 1], *p = &dir[strlen(dir) - 1]; struct dirent *dp; DIR *dirp; while (p > dir && *p != '/') *p-- = '\0'; if ((dirp = (opendir(dir))) != NULL) { mg_printf(c, "%s\r\n", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n"); mg_http_printf_chunk( c, "Index of %.*s" "" "

Index of %.*s

" "" "", (int) hm->uri.len, hm->uri.ptr, (int) hm->uri.len, hm->uri.ptr); while ((dp = readdir(dirp)) != NULL) { struct stat st; // Do not show current dir and hidden files if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue; snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name); if (stat(path, &st) != 0) { LOG(LL_ERROR, ("%lu stat(%s): %d", c->id, path, errno)); continue; } printdirentry(c, hm, dp->d_name, &st); } closedir(dirp); mg_http_printf_chunk( c, "" "
NameModifiedSize
Mongoose v.%s
", MG_VERSION); mg_http_write_chunk(c, "", 0); } else { mg_http_reply(c, 400, "", "Cannot open dir"); LOG(LL_DEBUG, ("%lu opendir(%s) -> %d", c->id, dir, errno)); } } #endif void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm, const char *dir) { char path[PATH_MAX + 2], root[sizeof(path) - 2], real[sizeof(path) - 2]; path[0] = root[0] = real[0] = '\0'; if (realpath(dir, root) == NULL) LOG(LL_DEBUG, ("realpath(%s): %d", dir, errno)); if (!mg_is_dir(root)) { mg_http_reply(c, 400, "", "Bad web root [%s]\n", root); } else { // NOTE(lsm): Xilinx snprintf does not 0-terminate the detination for // the %.*s specifier, if the length is zero. Make sure hm->uri.len > 0 bool is_index = false; size_t n = snprintf(path, sizeof(path), "%s%.*s", root, (int) hm->uri.len, hm->uri.ptr); while (n > 0 && n < sizeof(path) && path[n - 1] == '/') path[--n] = 0; if (realpath(path, real) == NULL) LOG(LL_DEBUG, ("realpath(%s): %d", path, errno)); // LOG(LL_INFO, ("[%s] [%s] [%s] [%s]", dir, root, path, real)); if (mg_is_dir(real)) { strncat(real, "/index.html", sizeof(real) - strlen(real) - 1); is_index = true; } if (strlen(real) < strlen(root) || memcmp(real, root, strlen(root)) != 0) { mg_http_reply(c, 404, "", "Not found %.*s\n", hm->uri.len, hm->uri.ptr); } else { FILE *fp = fopen(real, "r"); #if MG_ENABLE_HTTP_DEBUG_ENDPOINT snprintf(c->label, sizeof(c->label) - 1, "<-F %s", real); #endif if (is_index && fp == NULL) { #if MG_ENABLE_DIRECTORY_LISTING listdir(c, hm, real); #else mg_http_reply(c, 403, "", "%s", "Directory listing not supported"); #endif } else { mg_http_serve_file(c, hm, real, guess_content_type(real)); } if (fp != NULL) fclose(fp); } } } #endif void mg_http_creds(struct mg_http_message *hm, char *user, int userlen, char *pass, int 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); if (p != NULL) { snprintf(user, userlen, "%.*s", (int) (p - buf), buf); snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1); } } else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) { snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7); } else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) { size_t i; for (i = 0; i < v->len - 13; i++) { if (memcmp(&v->ptr[i], "access_token=", 13) == 0) { const char *p2 = v->ptr + i + 13, *p3 = p2; while (p2 < &v->ptr[v->len] && p2[0] != ';' && p2[0] != ' ') p2++; snprintf(pass, passlen, "%.*s", (int) (p2 - p3), p3); break; } } } else { mg_http_get_var(&hm->query, "access_token", pass, passlen); } } bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) { return mg_globmatch(glob, strlen(glob), hm->uri.ptr, hm->uri.len); } static void http_cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { if (ev == MG_EV_READ || ev == MG_EV_CLOSE) { struct mg_http_message hm; for (;;) { int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm); if (ev == MG_EV_CLOSE) { hm.message.len = c->recv.len; hm.body.len = hm.message.len - (hm.body.ptr - hm.message.ptr); } if (n < 0 && ev == MG_EV_READ) { LOG(LL_ERROR, ("%lu HTTP parse error", c->id)); c->is_closing = 1; break; } else if (n > 0 && (size_t) c->recv.len >= hm.message.len) { #if MG_ENABLE_HTTP_DEBUG_ENDPOINT snprintf(c->label, sizeof(c->label) - 1, "<-[%.*s]", (int) hm.uri.len, hm.uri.ptr); if (mg_http_match_uri(&hm, "/debug/info")) { struct mg_mgr *mgr = (struct mg_mgr *) fn_data; struct mg_connection *x; mg_printf(c, "%s\r\n", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n"); for (x = mgr->conns; x != NULL; x = x->next) { // LOG(LL_INFO, ("%p %s", x->fd, x->label)); mg_http_printf_chunk( c, "%-4p %-12s %04d.%04d/%04d.%04d" " %d%d%d%d%d%d%d%d%d%d%d%d%d%d\n", x->fd, x->label, x->recv.len, x->recv.size, x->send.len, x->send.size, c->is_listening, c->is_client, c->is_accepted, c->is_resolving, c->is_connecting, c->is_tls, c->is_tls_hs, c->is_udp, c->is_websocket, c->is_hexdumping, c->is_draining, c->is_closing, c->is_readable, c->is_writable); } mg_http_write_chunk(c, "", 0); mg_iobuf_delete(&c->recv, hm.message.len); continue; } #endif mg_call(c, MG_EV_HTTP_MSG, &hm); mg_iobuf_delete(&c->recv, hm.message.len); } else { break; } } } (void) fn_data; (void) ev_data; } 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, c->pfn_data = mgr; #if MG_ENABLE_HTTP_DEBUG_ENDPOINT snprintf(c->label, sizeof(c->label) - 1, "->%s", url); #endif 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, c->pfn_data = mgr; #if MG_ENABLE_HTTP_DEBUG_ENDPOINT if (c != NULL) snprintf(c->label, sizeof(c->label) - 1, "<-LSN"); #endif return c; } #ifdef MG_ENABLE_LINES #line 1 "src/iobuf.c" #endif #include void mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) { if (new_size == 0) { 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 malloc/free only, to ease the // porting to some obscure platforms like FreeRTOS void *p = malloc(new_size); if (p != NULL) { memcpy(p, io->buf, io->size < new_size ? io->size : new_size); free(io->buf); io->buf = (unsigned char *) p; io->size = new_size; } else { LOG(LL_ERROR, ("%lu->%lu", (unsigned long) io->size, (unsigned long) new_size)); } } } void mg_iobuf_init(struct mg_iobuf *io, size_t size) { io->buf = NULL; io->len = io->size = 0; if (size > 0) mg_iobuf_resize(io, size); } size_t mg_iobuf_append(struct mg_iobuf *io, const void *buf, size_t len, size_t chunk_size) { size_t new_size = io->len + len + chunk_size; new_size -= new_size % chunk_size; if (new_size != io->size) mg_iobuf_resize(io, new_size); if (new_size != io->size) len = 0; // Realloc failure, append nothing if (buf != NULL) memmove(io->buf + io->len, buf, len); io->len += len; return len; } size_t mg_iobuf_delete(struct mg_iobuf *io, size_t len) { if (len > io->len) len = 0; memmove(io->buf, io->buf + len, io->len - len); io->len -= len; return len; } void mg_iobuf_free(struct mg_iobuf *io) { free(io->buf); mg_iobuf_init(io, 0); } #ifdef MG_ENABLE_LINES #line 1 "src/log.c" #endif #if MG_ENABLE_MGOS #else #if MG_ENABLE_LOG static void mg_log_stdout(const void *buf, int len, void *userdata) { (void) userdata; fwrite(buf, 1, len, stdout); } static const char *s_spec = "2"; static void (*s_fn)(const void *, int, void *) = mg_log_stdout; static void *s_fn_param = NULL; void mg_log_set(const char *spec) { LOG(LL_INFO, ("Setting log level to %s", spec)); s_spec = spec; } bool mg_log_prefix(int level, const char *file, int line, const char *fname) { // static unsigned long seq; int max = LL_INFO; struct mg_str k, v, s = mg_str(s_spec); const char *p = strrchr(file, '/'); p = p == NULL ? file : p + 1; if (s_fn == NULL) return false; while (mg_next_comma_entry(&s, &k, &v)) { if (v.len == 0) max = atoi(k.ptr); if (v.len > 0 && strncmp(p, k.ptr, k.len) == 0) max = atoi(v.ptr); } if (level <= max) { char timebuf[21], buf[50] = ""; time_t t = time(NULL); struct tm *tm = gmtime(&t); int n, tag; strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", tm); tag = level == LL_ERROR ? 'E' : level == LL_INFO ? 'I' : ' '; n = snprintf(buf, sizeof(buf), "%s %c %s:%d:%s", timebuf, tag, p, line, fname); if (n < 0 || n > (int) sizeof(buf) - 2) n = sizeof(buf) - 2; while (n < (int) sizeof(buf) - 1) buf[n++] = ' '; s_fn(buf, sizeof(buf) - 1, s_fn_param); return true; } else { return false; } } void mg_log(const char *fmt, ...) { char mem[256], *buf = mem; va_list ap; int len = 0; va_start(ap, fmt); len = mg_vasprintf(&buf, sizeof(mem), fmt, ap); va_end(ap); s_fn(buf, len, s_fn_param); s_fn("\n", 1, s_fn_param); if (buf != mem) free(buf); } void mg_log_set_callback(void (*fn)(const void *, int, void *), void *param) { s_fn = fn; s_fn_param = param; } #endif #endif #ifdef MG_ENABLE_LINES #line 1 "src/lwip.c" #endif #if MG_ENABLE_LWIP #include #include static void tcp_error_cb(void *arg, err_t err) { struct mg_connection *c = (struct mg_connection *) arg; mg_error(c, "%p err %ld", c->fd, err); } static err_t connect_cb(void *arg, struct tcp_pcb *pcb, err_t err) { struct mg_connection *c = (struct mg_connection *) arg; LOG(LL_DEBUG, ("err %ld, arg %p, pcb %p", err, arg, pcb)); c->is_connecting = 0; if (err != ERR_OK) mg_error(c, "%p err %d", c->fd, err); return err; } static err_t tcp_recv_cb(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) { struct mg_connection *c = (struct mg_connection *) arg; LOG(LL_DEBUG, ("err %ld, pbuf %p/%d, io.len %d, io.size %d", err, p, p == NULL ? 0 : (int) p->len, (int) c->recv.len, (int) c->recv.size)); if (err == ERR_OK && p != NULL) { #if 0 if (s->io.size < s->io.len + p->len) { char *buf = realloc(s->io.buf, s->io.len + p->len); if (buf != NULL) { s->io.buf = buf; s->io.size = s->io.len + p->len; } else { return ERR_MEM; } } // MLOG(LL_DEBUG, " --> cpy, %p %p", s->io.buf, p->payload); memcpy(s->io.buf + s->io.len, p->payload, p->len); s->io.len += p->len; #endif tcp_recved(pcb, p->len); pbuf_free(p); return err; } else { // rmsock(s); return ERR_ABRT; } } static void udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, uint16_t port) { LOG(LL_DEBUG, ("%p %p pbuf %p/%d port %hu", arg, pcb, p, p == NULL ? 0 : p->len, port)); } static err_t tcp_sent_cb(void *arg, struct tcp_pcb *pcb, uint16_t len) { LOG(LL_DEBUG, ("%p %d", pcb, (int) len)); return ERR_OK; } #if 0 static int ll_write(struct mg_connection *c, const void *buf, int len, int *fail) { int n = c->is_tls ? mg_tls_send(c, buf, len, fail) : mg_sock_send(c, buf, len, fail); LOG(*fail ? LL_ERROR : LL_VERBOSE_DEBUG, ("%p %c%c%c %d/%d %d", c->fd, c->is_tls ? 'T' : 't', c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len, MG_SOCK_ERRNO)); if (n > 0 && c->is_hexdumping) mg_hexdump(c, "->", buf, n); return n; } #endif int mg_send(struct mg_connection *c, const void *buf, size_t len) { if (c->is_udp) { struct udp_pcb *pcb = (struct udp_pcb *) c->fd; struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM); if (p != NULL) { // p->payload = (void *) buf; memcpy(p->payload, buf, len); err_t err = udp_send(pcb, p); pbuf_free(p); LOG(LL_DEBUG, ("%lu UDP %d bytes -> %x:%hu, err %ld", c->id, (int) len, (unsigned) *(uint32_t *) &pcb->remote_ip, pcb->remote_port, err)); if (err != ERR_OK) mg_error(c, "%p err %d", c->fd, err); } else { mg_error(c, "%p pbuf OOM", c->fd); } } else if (c->is_connecting) { mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE); } else { } #if 0 int fail, n = c->is_udp ? ll_write(c, buf, (SOCKET) len, &fail) : mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE); return n; #endif return 0; } static struct mg_connection *mg_mkconn(const char *url) { struct mg_connection *c = (struct mg_connection *) calloc(1, sizeof(*c)); typedef void *(*new_t)(void); int is_udp = strncmp(url, "udp:", 4) == 0; if (c == NULL) { LOG(LL_ERROR, ("%s %s", url, "OOM")); } else if ((c->fd = (is_udp ? (new_t) udp_new : (new_t) tcp_new)()) == NULL) { LOG(LL_ERROR, ("%s new", url)); free(c); c = NULL; } else { c->is_udp = is_udp; } return 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 = mg_mkconn(url); struct mg_str host = mg_url_host(url); if (c == NULL) return c; c->next = mgr->conns; mgr->conns = c; // mg_set_non_blocking_mode((SOCKET) c->fd); c->is_client = 1; c->peer.port = mg_htons(mg_url_port(url)); c->fn = fn; c->fn_data = fn_data; c->is_hexdumping = 1; if (c->is_udp) { udp_bind(c->fd, IP_ADDR_ANY, 0); udp_recv(c->fd, udp_recv_cb, c); } else { tcp_arg(c->fd, c); tcp_err(c->fd, tcp_error_cb); tcp_sent(c->fd, tcp_sent_cb); tcp_recv(c->fd, tcp_recv_cb); tcp_bind(c->fd, IP_ADDR_ANY, 0); tcp_nagle_disable((struct tcp_pcb *) c->fd); } LOG(LL_DEBUG, ("%lu -> %s %s", c->id, url, c->is_udp ? "UDP" : "TCP")); mg_resolve(mgr, c, &host, mgr->dnstimeout); return c; } void mg_connect_resolved(struct mg_connection *c) { char buf[40]; ip_addr_t ipaddr; memcpy(&ipaddr, &c->peer.ip, sizeof(ipaddr)); mg_call(c, MG_EV_RESOLVE, NULL); LOG(LL_DEBUG, ("%lu resolved to %s", c->id, mg_straddr(c, buf, sizeof(buf)))); err_t err = c->is_udp ? udp_connect((struct udp_pcb *) c->fd, &ipaddr, mg_ntohs(c->peer.port)) : tcp_connect((struct tcp_pcb *) c->fd, &ipaddr, mg_ntohs(c->peer.port), connect_cb); if (c->is_udp) c->is_connecting = 0; if (err != ERR_OK) mg_error(c, "%p failed, err %d", c->fd, err); } static err_t accept_cb(void *arg, struct tcp_pcb *pcb, err_t e) { LOG(LL_DEBUG, ("%p err %ld, pcb %p", arg, e, pcb)); return ERR_OK; } struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url, mg_event_handler_t fn, void *fn_data) { struct mg_connection *c = mg_mkconn(url); struct mg_str host = mg_url_host(url); uint16_t port = mg_url_port(url); uint32_t ipaddr; err_t err; if (c == NULL) return c; mg_aton(host.ptr, &ipaddr); if (!mg_vcasecmp(&host, "localhost")) ipaddr = mg_htonl(0x7f000001); if ((err = tcp_bind(c->fd, (ip_addr_t *) &ipaddr, port)) != ERR_OK) { mg_error(c, "%p tcp_bind(%x:%hu) -> %ld", c->fd, ipaddr, port, err); } else { tcp_listen(c->fd); tcp_accept(c->fd, accept_cb); } return c; } void mg_mgr_poll(struct mg_mgr *mgr, int ms) { LOG(LL_DEBUG, ("%p %d", mgr, ms)); mg_usleep(200 * 1000); mg_timer_poll(mg_millis()); } #endif #ifdef MG_ENABLE_LINES #line 1 "src/md5.c" #endif #include #if MG_ENABLE_MD5 #if !defined(BYTE_ORDER) && defined(__BYTE_ORDER) #define BYTE_ORDER __BYTE_ORDER #ifndef LITTLE_ENDIAN #define LITTLE_ENDIAN __LITTLE_ENDIAN #endif /* LITTLE_ENDIAN */ #ifndef BIG_ENDIAN #define BIG_ENDIAN __LITTLE_ENDIAN #endif /* BIG_ENDIAN */ #endif /* BYTE_ORDER */ static void mg_byte_reverse(unsigned char *buf, unsigned longs) { /* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */ #if BYTE_ORDER == 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; #endif } #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 #define MQTT_GET_WILL_QOS(flags) (((flags) &0x18) >> 3) #define MQTT_SET_WILL_QOS(flags, qos) (flags) = ((flags) & ~0x18) | ((qos) << 3) enum { MQTT_OK, MQTT_INCOMPLETE, MQTT_MALFORMED }; 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] = (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, vlen - buf); } static void mg_send_u16(struct mg_connection *c, uint16_t value) { mg_send(c, &value, sizeof(value)); } static void mqtt_login(struct mg_connection *c, const char *url, struct mg_mqtt_opts *opts) { uint32_t total_len = 7 + 1 + 2 + 2; uint16_t flags = (opts->qos & 3) << 3; struct mg_str user = mg_url_user(url); struct mg_str pass = mg_url_pass(url); if (user.len > 0) { total_len += 2 + (uint32_t) user.len; flags |= MQTT_HAS_USER_NAME; } if (pass.len > 0) { total_len += 2 + (uint32_t) pass.len; flags |= 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; flags |= MQTT_HAS_WILL; } if (opts->clean || opts->client_id.len == 0) flags |= MQTT_CLEAN_SESSION; if (opts->will_retain) flags |= MQTT_WILL_RETAIN; total_len += (uint32_t) opts->client_id.len; mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len); mg_send(c, "\00\04MQTT\04", 7); mg_send(c, &flags, 1); // keepalive == 0 means "do not disconnect us!" mg_send_u16(c, mg_htons((uint16_t) opts->keepalive)); mg_send_u16(c, mg_htons((uint16_t) opts->client_id.len)); mg_send(c, opts->client_id.ptr, opts->client_id.len); if (flags & MQTT_HAS_WILL) { 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 (user.len > 0) { mg_send_u16(c, mg_htons((uint16_t) user.len)); mg_send(c, user.ptr, user.len); } if (pass.len > 0) { mg_send_u16(c, mg_htons((uint16_t) pass.len)); mg_send(c, pass.ptr, pass.len); } } void mg_mqtt_pub(struct mg_connection *c, struct mg_str *topic, struct mg_str *data) { uint8_t flags = MQTT_QOS(1); uint32_t total_len = 2 + (uint32_t) topic->len + (uint32_t) data->len; LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) topic->len, (char *) topic->ptr, (int) data->len, (char *) data->ptr)); if (MQTT_GET_QOS(flags) > 0) total_len += 2; mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, total_len); mg_send_u16(c, mg_htons((uint16_t) topic->len)); mg_send(c, topic->ptr, topic->len); if (MQTT_GET_QOS(flags) > 0) { static uint16_t s_id; if (++s_id == 0) s_id++; mg_send_u16(c, mg_htons(s_id)); } mg_send(c, data->ptr, data->len); } void mg_mqtt_sub(struct mg_connection *c, struct mg_str *topic) { static uint16_t s_id; uint8_t qos = 1; uint32_t total_len = 2 + (uint32_t) topic->len + 2 + 1; mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, (uint8_t) MQTT_QOS(qos), total_len); if (++s_id == 0) ++s_id; mg_send_u16(c, mg_htons(s_id)); 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, 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 = 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 += (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 = 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_SUBACK: if (p + 2 > end) return MQTT_MALFORMED; m->id = (p[0] << 8) | p[1]; break; case MQTT_CMD_SUBSCRIBE: { if (p + 2 > end) return MQTT_MALFORMED; m->id = (p[0] << 8) | p[1]; p += 2; break; } case MQTT_CMD_PUBLISH: { if (p + 2 > end) return MQTT_MALFORMED; m->topic.len = (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 = (p[0] << 8) | p[1]; p += 2; } if (p > end) return MQTT_MALFORMED; m->data.ptr = (char *) p; m->data.len = end - p; break; } default: break; } return MQTT_OK; } int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic, uint8_t *qos, int pos) { unsigned char *buf = (unsigned char *) msg->dgram.ptr + pos; int new_pos; if ((size_t) pos >= msg->dgram.len) return -1; topic->len = buf[0] << 8 | buf[1]; topic->ptr = (char *) buf + 2; new_pos = pos + 2 + topic->len + 1; if ((size_t) new_pos > msg->dgram.len) return -1; *qos = buf[2 + topic->len]; return new_pos; } static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { if (ev == MG_EV_READ) { for (;;) { struct mg_mqtt_message mm; int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, &mm); if (rc == MQTT_MALFORMED) { LOG(LL_ERROR, ("%lu MQTT malformed message", c->id)); c->is_closing = 1; break; } else if (rc == MQTT_OK) { LOG(LL_VERBOSE_DEBUG, ("%p MQTT CMD %d len %d [%.*s]", c->fd, 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) { LOG(LL_INFO, ("%lu Connected", c->id)); } else { LOG(LL_ERROR, ("%lu MQTT auth failed, code %d", c->id, mm.ack)); c->is_closing = 1; } break; case MQTT_CMD_PUBLISH: { LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len, mm.topic.ptr, (int) mm.data.len, mm.data.ptr)); mg_call(c, MG_EV_MQTT_MSG, &mm); break; } } mg_call(c, MG_EV_MQTT_CMD, &mm); mg_iobuf_delete(&c->recv, mm.dgram.len); } else { break; } } } (void) ev_data; (void) fn_data; } struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url, 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)); mqtt_login(c, url, 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 int mg_vprintf(struct mg_connection *c, const char *fmt, va_list ap) { char mem[256], *buf = mem; int len = mg_vasprintf(&buf, sizeof(mem), fmt, ap); len = mg_send(c, buf, len); if (buf != mem) free(buf); return len; } int mg_printf(struct mg_connection *c, const char *fmt, ...) { int 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_connection *c, char *buf, size_t len) { char tmp[100]; const char *fmt = c->peer.is_ip6 ? "[%s]:%d" : "%s:%d"; mg_ntoa(&c->peer, tmp, sizeof(tmp)); snprintf(buf, len, fmt, tmp, (int) mg_ntohs(c->peer.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; 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)); 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_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] = 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_aton6(struct mg_str str, struct mg_addr *addr) { size_t i, j = 0, n = 0, dc = 42; 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; // LOG(LL_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) { // LOG(LL_INFO, ("[%.*s]", (int) str.len, str.ptr)); return mg_atonl(str, addr) || mg_aton4(str, addr) || mg_aton6(str, addr); } void mg_mgr_free(struct mg_mgr *mgr) { struct mg_connection *c; for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1; mg_mgr_poll(mgr, 0); #if MG_ARCH == MG_ARCH_FREERTOS FreeRTOS_DeleteSocketSet(mgr->ss); #endif LOG(LL_INFO, ("All connections closed")); } void mg_mgr_init(struct mg_mgr *mgr) { #ifdef _WIN32 WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); #elif MG_ARCH == MG_ARCH_FREERTOS 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 memset(mgr, 0, sizeof(*mgr)); 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/sha1.c" #endif /* Copyright(c) By Steve Reid */ /* 100% Public Domain */ #include /* * clang with std=-c99 uses __LITTLE_ENDIAN, by default * while for ex, RTOS gcc - LITTLE_ENDIAN, by default * it depends on __USE_BSD, but let's have everything */ #if !defined(BYTE_ORDER) && defined(__BYTE_ORDER) #define BYTE_ORDER __BYTE_ORDER #ifndef LITTLE_ENDIAN #define LITTLE_ENDIAN __LITTLE_ENDIAN #endif /* LITTLE_ENDIAN */ #ifndef BIG_ENDIAN #define BIG_ENDIAN __LITTLE_ENDIAN #endif /* BIG_ENDIAN */ #endif /* BYTE_ORDER */ 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) { /* Forrest: SHA expect BIG_ENDIAN, swap if LITTLE_ENDIAN */ #if BYTE_ORDER == LITTLE_ENDIAN block->l[i] = (rol(block->l[i], 24) & 0xFF00FF00) | (rol(block->l[i], 8) & 0x00FF00FF); #endif 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); 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)); } void mg_hmac_sha1(const unsigned char *key, size_t keylen, const unsigned char *data, size_t datalen, unsigned char out[20]) { mg_sha1_ctx ctx; unsigned char buf1[64], buf2[64], tmp_key[20], i; if (keylen > sizeof(buf1)) { mg_sha1_init(&ctx); mg_sha1_update(&ctx, key, keylen); mg_sha1_final(tmp_key, &ctx); key = tmp_key; keylen = sizeof(tmp_key); } memset(buf1, 0, sizeof(buf1)); memset(buf2, 0, sizeof(buf2)); memcpy(buf1, key, keylen); memcpy(buf2, key, keylen); for (i = 0; i < sizeof(buf1); i++) { buf1[i] ^= 0x36; buf2[i] ^= 0x5c; } mg_sha1_init(&ctx); mg_sha1_update(&ctx, buf1, sizeof(buf1)); mg_sha1_update(&ctx, data, datalen); mg_sha1_final(out, &ctx); mg_sha1_init(&ctx); mg_sha1_update(&ctx, buf2, sizeof(buf2)); mg_sha1_update(&ctx, out, 20); mg_sha1_final(out, &ctx); } #ifdef MG_ENABLE_LINES #line 1 "src/sntp.c" #endif #define SNTP_INTERVAL_SEC (3600) #define SNTP_TIME_OFFSET 2208988800 static unsigned long s_sntmp_next; int mg_sntp_parse(const unsigned char *buf, size_t len, struct timeval *tv) { int mode = len > 0 ? buf[0] & 7 : 0, res = -1; if (len < 48) { LOG(LL_ERROR, ("%s", "corrupt packet")); } else if ((buf[0] & 0x38) >> 3 != 4) { LOG(LL_ERROR, ("%s", "wrong version")); } else if (mode != 4 && mode != 5) { LOG(LL_ERROR, ("%s", "not a server reply")); } else if (buf[1] == 0) { LOG(LL_ERROR, ("%s", "server sent a kiss of death")); } else { uint32_t *data = (uint32_t *) &buf[40]; tv->tv_sec = mg_ntohl(data[0]) - SNTP_TIME_OFFSET; tv->tv_usec = mg_ntohl(data[1]); s_sntmp_next = tv->tv_sec + SNTP_INTERVAL_SEC; res = 0; } return res; } static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) { if (ev == MG_EV_READ) { struct timeval tv = {0, 0}; if (mg_sntp_parse(c->recv.buf, c->recv.len, &tv) == 0) { mg_call(c, MG_EV_SNTP_TIME, &tv); LOG(LL_DEBUG, ("%u.%u, next at %lu", (unsigned) tv.tv_sec, (unsigned) tv.tv_usec, s_sntmp_next)); } c->recv.len = 0; // Clear receive buffer } else if (ev == MG_EV_RESOLVE) { mg_sntp_send(c, time(NULL)); } else if (ev == MG_EV_CLOSE) { // mg_fn_del(c, sntp_cb); } (void) fnd; (void) evd; } void mg_sntp_send(struct mg_connection *c, unsigned long utc) { if (c->is_resolving) { LOG(LL_ERROR, ("%lu wait until resolved", c->id)); } else if (utc > s_sntmp_next) { uint8_t buf[48] = {0}; s_sntmp_next = utc + SNTP_INTERVAL_SEC; buf[0] = (3 << 6) | (4 << 3) | 3; mg_send(c, buf, sizeof(buf)); LOG(LL_DEBUG, ("%p request sent, ct %lu, next at %lu", c->fd, utc, s_sntmp_next)); } } 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 defined(_WIN32) #define MG_SOCK_ERRNO WSAGetLastError() #define FD(C_) ((SOCKET)(C_)->fd) #elif MG_ARCH == MG_ARCH_FREERTOS #define MG_SOCK_ERRNO errno typedef Socket_t SOCKET; #define FD(C_) ((long) (C_)->fd) #define INVALID_SOCKET FREERTOS_INVALID_SOCKET #else #define MG_SOCK_ERRNO errno #define closesocket(x) close(x) #define INVALID_SOCKET (-1) typedef int SOCKET; #define FD(C_) ((SOCKET)(long) (C_)->fd) #endif #ifndef MSG_NONBLOCKING #define MSG_NONBLOCKING 0 #endif union usa { struct sockaddr sa; struct sockaddr_in sin; #if MG_ENABLE_IPV6 struct sockaddr_in6 sin6; #endif }; static union usa tousa(struct mg_addr *a) { union usa usa; 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)); } #endif return usa; } static int mg_sock_failed(void) { int err = MG_SOCK_ERRNO; return err != EINPROGRESS && err != EWOULDBLOCK #ifndef WINCE && err != EAGAIN && err != EINTR #endif #ifdef _WIN32 && err != WSAEINTR && err != WSAEWOULDBLOCK #endif ; } static struct mg_connection *alloc_conn(struct mg_mgr *mgr, int is_client, SOCKET fd) { struct mg_connection *c = (struct mg_connection *) calloc(1, sizeof(*c)); if (c != NULL) { c->is_client = is_client; c->fd = (void *) (long) fd; c->mgr = mgr; c->id = ++mgr->nextid; } return c; } static int mg_sock_recv(struct mg_connection *c, void *buf, int len, int *fail) { int n = 0; if (c->is_udp) { union usa usa; socklen_t slen = sizeof(usa.sin); #if MG_ENABLE_IPV6 if (c->peer.is_ip6) slen = sizeof(usa.sin6); #endif n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen); if (n > 0) { if (c->peer.is_ip6) { #if MG_ENABLE_IPV6 memcpy(c->peer.ip6, &usa.sin6.sin6_addr, sizeof(c->peer.ip6)); c->peer.port = usa.sin6.sin6_port; #endif } else { c->peer.ip = *(uint32_t *) &usa.sin.sin_addr; c->peer.port = usa.sin.sin_port; } } } else { n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING); } *fail = (n == 0) || (n < 0 && mg_sock_failed()); return n; } static int mg_sock_send(struct mg_connection *c, const void *buf, int len, int *fail) { int n = 0; if (c->is_udp) { union usa usa = tousa(&c->peer); socklen_t slen = sizeof(usa.sin); #if MG_ENABLE_IPV6 if (c->peer.is_ip6) slen = sizeof(usa.sin6); #endif n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen); } else { n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING); } *fail = (n == 0) || (n < 0 && mg_sock_failed()); return n; } static int ll_read(struct mg_connection *c, void *buf, int len, int *fail) { int n = c->is_tls ? mg_tls_recv(c, buf, len, fail) : mg_sock_recv(c, buf, len, fail); LOG(*fail ? LL_DEBUG : LL_VERBOSE_DEBUG, ("%lu %c%c%c %d/%d %d %d", c->id, c->is_tls ? 'T' : 't', c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len, MG_SOCK_ERRNO, *fail)); if (n > 0 && c->is_hexdumping) { char *s = mg_hexdump(buf, n); LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "<-", n, s)); free(s); } return n; } static int ll_write(struct mg_connection *c, const void *buf, int len, int *fail) { int n = c->is_tls ? mg_tls_send(c, buf, len, fail) : mg_sock_send(c, buf, len, fail); LOG(*fail ? LL_ERROR : LL_VERBOSE_DEBUG, ("%lu %c%c%c %d/%d %d", c->id, c->is_tls ? 'T' : 't', c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len, MG_SOCK_ERRNO)); if (n > 0 && c->is_hexdumping) { char *s = mg_hexdump(buf, len); LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "->", len, s)); free(s); } return n; } int mg_send(struct mg_connection *c, const void *buf, size_t len) { int fail, n = c->is_udp ? ll_write(c, buf, (SOCKET) len, &fail) : (int) mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE); return n; } static void mg_set_non_blocking_mode(SOCKET fd) { #ifdef _WIN32 unsigned long on = 1; ioctlsocket(fd, FIONBIO, &on); #elif MG_ARCH == MG_ARCH_FREERTOS const BaseType_t off = 0; setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off)); setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off)); #else fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); #endif } SOCKET mg_open_listener(const char *url) { struct mg_addr addr; SOCKET fd = INVALID_SOCKET; memset(&addr, 0, sizeof(addr)); addr.port = mg_htons(mg_url_port(url)); if (!mg_aton(mg_url_host(url), &addr)) { LOG(LL_ERROR, ("invalid listening URL: %s", url)); } else { union usa usa = tousa(&addr); int on = 1, af = AF_INET; int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM; int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP; socklen_t slen = sizeof(usa.sin); #if MG_ENABLE_IPV6 if (addr.is_ip6) af = AF_INET6, slen = sizeof(usa.sin6); #endif if ((fd = socket(af, type, proto)) != INVALID_SOCKET && #if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE) // 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. !setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) && #endif #if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE) // "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE" !setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (char *) &on, sizeof(on)) && #endif bind(fd, &usa.sa, slen) == 0 && // NOTE(lsm): FreeRTOS uses backlog value as a connection limit (type == SOCK_DGRAM || listen(fd, 128) == 0)) { mg_set_non_blocking_mode(fd); } else if (fd != INVALID_SOCKET) { LOG(LL_ERROR, ("Failed to listen on %s, errno %d", url, MG_SOCK_ERRNO)); closesocket(fd); fd = INVALID_SOCKET; } } return fd; } static void read_conn(struct mg_connection *c, int (*fn)(struct mg_connection *, void *, int, int *)) { unsigned char *buf; int rc, len, fail; // NOTE(lsm): do only one iteration of reads, cause some systems // (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data if (c->recv.size - c->recv.len < MG_IO_SIZE && c->recv.size < MG_MAX_RECV_BUF_SIZE) { mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE); } buf = c->recv.buf + c->recv.len; len = (int) (c->recv.size - c->recv.len); rc = fn(c, buf, len, &fail); if (rc > 0) { struct mg_str evd = mg_str_n((char *) buf, rc); c->recv.len += rc; mg_call(c, MG_EV_READ, &evd); } else { if (fail) c->is_closing = 1; } } static int write_conn(struct mg_connection *c) { int fail, rc = ll_write(c, c->send.buf, (SOCKET) c->send.len, &fail); if (rc > 0) { mg_iobuf_delete(&c->send, rc); if (c->send.len == 0) mg_iobuf_resize(&c->send, 0); mg_call(c, MG_EV_WRITE, &rc); } else if (fail) { c->is_closing = 1; } return rc; } static void close_conn(struct mg_connection *c) { // Unlink this connection from the list LIST_DELETE(struct mg_connection, &c->mgr->conns, c); mg_resolve_cancel(c); if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL; if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL; mg_call(c, MG_EV_CLOSE, NULL); // while (c->callbacks != NULL) mg_fn_del(c, c->callbacks->fn); LOG(LL_DEBUG, ("%lu closed", c->id)); if (FD(c) != INVALID_SOCKET) { closesocket(FD(c)); #if MG_ARCH == MG_ARCH_FREERTOS FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL); #endif } mg_tls_free(c); free(c->recv.buf); free(c->send.buf); memset(c, 0, sizeof(*c)); free(c); } static void setsockopts(struct mg_connection *c) { #if MG_ARCH == MG_ARCH_FREERTOS FreeRTOS_FD_SET(c->fd, c->mgr->ss, eSELECT_READ | eSELECT_EXCEPT); #else int on = 1; #if !defined(SOL_TCP) #define SOL_TCP IPPROTO_TCP #endif setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on)); #if defined(TCP_QUICKACK) setsockopt(FD(c), SOL_TCP, TCP_QUICKACK, (char *) &on, sizeof(on)); #endif setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)); #if ESP32 || ESP8266 || defined(__linux__) int idle = 60; setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(idle)); #endif #ifndef _WIN32 { int cnt = 3, intvl = 20; setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPCNT, &cnt, sizeof(cnt)); setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPINTVL, &intvl, sizeof(intvl)); } #endif #endif } void mg_connect_resolved(struct mg_connection *c) { char buf[40]; int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM; int af = AF_INET; #if MG_ENABLE_IPV6 if (c->peer.is_ip6) af = AF_INET6; #endif mg_straddr(c, buf, sizeof(buf)); c->fd = (void *) (long) socket(af, type, 0); LOG(LL_DEBUG, ("%lu resolved, sock %p -> %s", c->id, c->fd, buf)); if (FD(c) == INVALID_SOCKET) { mg_error(c, "socket(): %d", MG_SOCK_ERRNO); return; } mg_set_non_blocking_mode(FD(c)); mg_call(c, MG_EV_RESOLVE, NULL); if (type == SOCK_STREAM) { union usa usa = tousa(&c->peer); socklen_t slen = #if MG_ENABLE_IPV6 c->peer.is_ip6 ? sizeof(usa.sin6) : #endif sizeof(usa.sin); int rc = connect(FD(c), &usa.sa, slen); int fail = rc < 0 && mg_sock_failed() ? MG_SOCK_ERRNO : 0; if (fail) { mg_error(c, "connect: %d", MG_SOCK_ERRNO); } else { setsockopts(c); } if (rc < 0) c->is_connecting = 1; } } 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 ((c = alloc_conn(mgr, 1, INVALID_SOCKET)) == NULL) { LOG(LL_ERROR, ("OOM")); } else { struct mg_str host = mg_url_host(url); LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); c->is_udp = (strncmp(url, "udp:", 4) == 0); c->peer.port = mg_htons(mg_url_port(url)); c->fn = fn; c->fn_data = fn_data; LOG(LL_DEBUG, ("%lu -> %s", c->id, url)); mg_resolve(c, &host, mgr->dnstimeout); } return c; } 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.sin); SOCKET fd = accept(FD(lsn), &usa.sa, &sa_len); if (fd == INVALID_SOCKET) { LOG(LL_ERROR, ("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO)); #if !defined(_WIN32) } else if (fd >= FD_SETSIZE) { LOG(LL_ERROR, ("%ld > %ld", (long) fd, (long) FD_SETSIZE)); closesocket(fd); #endif } else if ((c = alloc_conn(mgr, 0, fd)) == NULL) { LOG(LL_ERROR, ("%lu OOM", lsn->id)); closesocket(fd); } else { char buf[40]; c->peer.port = usa.sin.sin_port; memcpy(&c->peer.ip, &usa.sin.sin_addr, sizeof(c->peer.ip)); mg_straddr(c, buf, sizeof(buf)); LOG(LL_DEBUG, ("%lu accepted %s", c->id, buf)); mg_set_non_blocking_mode(FD(c)); setsockopts(c); LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); c->is_accepted = 1; c->is_hexdumping = lsn->is_hexdumping; c->pfn = lsn->pfn; c->pfn_data = lsn->pfn_data; c->fn = lsn->fn; c->fn_data = lsn->fn_data; mg_call(c, MG_EV_ACCEPT, NULL); } } #if MG_ENABLE_SOCKETPAIR bool mg_socketpair(int *s1, int *s2) { #if MG_ARCH == MG_ARCH_UNIX int sp[2], ret = 0; if (socketpair(AF_INET, SOCK_DGRAM, 0, sp) == 0) { *s1 = sp[0], *s2 = sp[1], ret = 1; } return ret; #else union usa sa, sa2; SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET}; socklen_t len = sizeof(sa.sin); int ret = 0, res[2] = {-1, -1}; (void) memset(&sa, 0, sizeof(sa)); sa.sin.sin_family = AF_INET; sa.sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */ sa2 = sa; if ((sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && (sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET && bind(sp[0], &sa.sa, len) == 0 && bind(sp[1], &sa2.sa, len) == 0 && getsockname(sp[0], &sa.sa, &len) == 0 && getsockname(sp[1], &sa2.sa, &len) == 0 && connect(sp[0], &sa2.sa, len) == 0 && connect(sp[1], &sa.sa, len) == 0) { mg_set_non_blocking_mode(sp[1]); *s1 = sp[0]; *s2 = sp[1]; ret = 1; } else { if (sp[0] != INVALID_SOCKET) closesocket(sp[0]); if (sp[1] != INVALID_SOCKET) closesocket(sp[1]); } return ret; #endif } #endif 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; int is_udp = strncmp(url, "udp:", 4) == 0; SOCKET fd = mg_open_listener(url); if (fd == INVALID_SOCKET) { } else if ((c = alloc_conn(mgr, 0, fd)) == NULL) { LOG(LL_ERROR, ("OOM %s", url)); closesocket(fd); } else { c->fd = (void *) (long) fd; c->is_listening = 1; c->is_udp = is_udp; setsockopts(c); LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c); c->fn = fn; c->fn_data = fn_data; LOG(LL_INFO, ("%lu accepting on %s", c->id, url)); } return c; } static void mg_iotest(struct mg_mgr *mgr, int ms) { #if MG_ARCH == MG_ARCH_FREERTOS struct mg_connection *c; for (c = mgr->conns; c != NULL; c = c->next) { FreeRTOS_FD_CLR(c->fd, mgr->ss, eSELECT_WRITE); if (c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0)) 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; } #else struct timeval tv = {ms / 1000, (ms % 1000) * 1000}; struct mg_connection *c; fd_set rset, wset; SOCKET maxfd = 0; int rc; FD_ZERO(&rset); FD_ZERO(&wset); for (c = mgr->conns; c != NULL; c = c->next) { // c->is_writable = 0; // TLS might have stuff buffered, so dig everything // c->is_readable = c->is_tls && c->is_readable ? 1 : 0; if (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) continue; FD_SET(FD(c), &rset); if (FD(c) > maxfd) maxfd = FD(c); if (c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0)) FD_SET(FD(c), &wset); } if ((rc = select(maxfd + 1, &rset, &wset, NULL, &tv)) < 0) { LOG(LL_DEBUG, ("select: %d %d", rc, MG_SOCK_ERRNO)); FD_ZERO(&rset); FD_ZERO(&wset); } for (c = mgr->conns; c != NULL; c = c->next) { // TLS might have stuff buffered, so dig everything c->is_readable = c->is_tls && c->is_readable ? 1 : FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset); c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset); } #endif } static void connect_conn(struct mg_connection *c) { int rc = 0; socklen_t len = sizeof(rc); if (getsockopt(FD(c), SOL_SOCKET, SO_ERROR, (char *) &rc, &len)) rc = 1; if (rc == EAGAIN || rc == EWOULDBLOCK) rc = 0; c->is_connecting = 0; if (rc) { char buf[40]; mg_error(c, "error connecting to %s", mg_straddr(c, buf, sizeof(buf))); } else { if (c->is_tls_hs) mg_tls_handshake(c); mg_call(c, MG_EV_CONNECT, NULL); } } void mg_mgr_poll(struct mg_mgr *mgr, int ms) { struct mg_connection *c, *tmp; unsigned long now; mg_iotest(mgr, ms); now = mg_millis(); mg_timer_poll(now); for (c = mgr->conns; c != NULL; c = tmp) { tmp = c->next; mg_call(c, MG_EV_POLL, &now); LOG(LL_VERBOSE_DEBUG, ("%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, ll_read); 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/str.c" #endif #include struct mg_str mg_str(const char *s) { struct mg_str str = {s, s == NULL ? 0 : strlen(s)}; return str; } struct mg_str mg_str_n(const char *s, size_t n) { struct mg_str str = {s, n}; return str; } int mg_lower(const char *s) { return tolower(*(const unsigned char *) s); } int mg_ncasecmp(const char *s1, const char *s2, size_t len) { int diff = 0; if (len > 0) do { diff = mg_lower(s1++) - mg_lower(s2++); } while (diff == 0 && s1[-1] != '\0' && --len > 0); return diff; } int mg_casecmp(const char *s1, const char *s2) { return mg_ncasecmp(s1, s2, (size_t) ~0); } int mg_vcmp(const struct mg_str *s1, const char *s2) { size_t n2 = strlen(s2), n1 = s1->len; int r = strncmp(s1->ptr, s2, (n1 < n2) ? n1 : n2); if (r == 0) return (int) (n1 - n2); return r; } int mg_vcasecmp(const struct mg_str *str1, const char *str2) { size_t n2 = strlen(str2), n1 = str1->len; int r = mg_ncasecmp(str1->ptr, str2, (n1 < n2) ? n1 : n2); if (r == 0) return (int) (n1 - n2); return r; } struct mg_str mg_strdup(const struct mg_str s) { struct mg_str r = {NULL, 0}; if (s.len > 0 && s.ptr != NULL) { char *sc = (char *) malloc(s.len + 1); if (sc != NULL) { memcpy(sc, s.ptr, s.len); sc[s.len] = '\0'; r.ptr = sc; r.len = s.len; } } return r; } int mg_strcmp(const struct mg_str str1, const struct mg_str str2) { size_t i = 0; while (i < str1.len && i < str2.len) { int c1 = str1.ptr[i]; int c2 = str2.ptr[i]; if (c1 < c2) return -1; if (c1 > c2) return 1; i++; } if (i < str1.len) return 1; if (i < str2.len) return -1; return 0; } const char *mg_strstr(const struct mg_str haystack, const struct mg_str needle) { size_t i; if (needle.len > haystack.len) return NULL; for (i = 0; i <= haystack.len - needle.len; i++) { if (memcmp(haystack.ptr + i, needle.ptr, needle.len) == 0) { return haystack.ptr + i; } } return NULL; } struct mg_str mg_strstrip(struct mg_str s) { while (s.len > 0 && isspace((int) *s.ptr)) s.ptr++, s.len--; while (s.len > 0 && isspace((int) *(s.ptr + s.len - 1))) s.len--; return s; } #ifdef MG_ENABLE_LINES #line 1 "src/timer.c" #endif // Copyright (c) Cesanta Software Limited // All rights reserved struct mg_timer *g_timers; void mg_timer_init(struct mg_timer *t, int ms, int flags, void (*fn)(void *), void *arg) { struct mg_timer tmp = {ms, flags, fn, arg, 0UL, g_timers}; *t = tmp; g_timers = t; if (flags & MG_TIMER_RUN_NOW) fn(arg); } void mg_timer_free(struct mg_timer *t) { struct mg_timer **head = &g_timers; while (*head && *head != t) head = &(*head)->next; if (*head) *head = t->next; } void mg_timer_poll(unsigned long now_ms) { // If time goes back (wrapped around), reset timers struct mg_timer *t, *tmp; static unsigned long oldnow; // Timestamp in a previous invocation if (oldnow > now_ms) { // If it is wrapped, reset timers for (t = g_timers; t != NULL; t = t->next) t->expire = 0; } oldnow = now_ms; for (t = g_timers; t != NULL; t = tmp) { tmp = t->next; if (t->expire == 0) t->expire = now_ms + t->period_ms; if (t->expire > now_ms) continue; t->fn(t->arg); // Try to tick timers with the given period as accurate as possible, // even if this polling function is called with some random period. t->expire = now_ms - t->expire > (unsigned long) t->period_ms ? now_ms + t->period_ms : t->expire + t->period_ms; if (!(t->flags & MG_TIMER_REPEAT)) mg_timer_free(t); } } #ifdef MG_ENABLE_LINES #line 1 "src/tls.c" #endif #if MG_ENABLE_MBEDTLS ///////////////////////////////////////// MBEDTLS #include #include // Different versions have those in different files, so declare here #ifdef __cplusplus #define EXTERN_C extern "C" #else #define EXTERN_C #endif EXTERN_C int mbedtls_net_recv(void *, unsigned char *, size_t); EXTERN_C int mbedtls_net_send(void *, const unsigned char *, size_t); struct mg_tls { char *cafile; // CA certificate path mbedtls_x509_crt ca; // Parsed CA certificate mbedtls_x509_crt cert; // Parsed certificate mbedtls_ssl_context ssl; // SSL/TLS context mbedtls_ssl_config conf; // SSL-TLS config mbedtls_pk_context pk; // Private key context }; int mg_tls_handshake(struct mg_connection *c) { struct mg_tls *tls = (struct mg_tls *) c->tls; int rc; mbedtls_ssl_set_bio(&tls->ssl, &c->fd, mbedtls_net_send, mbedtls_net_recv, 0); rc = mbedtls_ssl_handshake(&tls->ssl); if (rc == 0) { // Success LOG(LL_DEBUG, ("%lu success", c->id)); c->is_tls_hs = 0; } else if (rc == MBEDTLS_ERR_SSL_WANT_READ || rc == MBEDTLS_ERR_SSL_WANT_WRITE) { // Still pending LOG(LL_VERBOSE_DEBUG, ("%lu pending, %d%d %d (-%#x)", c->id, c->is_connecting, c->is_tls_hs, rc, -rc)); } else { mg_error(c, "TLS handshake: -%#x", -rc); // Error } return rc == 0; } static int mbed_rng(void *ctx, unsigned char *buf, size_t len) { mg_random(buf, len); (void) ctx; return 0; } static void debug_cb(void *c, int lev, const char *s, int n, const char *s2) { n = strlen(s2) - 1; LOG(LL_VERBOSE_DEBUG, ("%p %.*s", ((struct mg_connection *) c)->fd, n, s2)); (void) s; (void) c; (void) lev; } int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) { struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls)); int rc = 0; LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id, opts->ca == NULL ? "null" : opts->ca, opts->cert == NULL ? "null" : opts->cert, opts->certkey == NULL ? "null" : opts->certkey)); mbedtls_ssl_init(&tls->ssl); mbedtls_ssl_config_init(&tls->conf); mbedtls_ssl_conf_dbg(&tls->conf, debug_cb, c); #if !defined(ESP_PLATFORM) mbedtls_debug_set_threshold(5); #endif if ((rc = mbedtls_ssl_config_defaults( &tls->conf, c->is_client ? MBEDTLS_SSL_IS_CLIENT : MBEDTLS_SSL_IS_SERVER, MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT)) != 0) { mg_error(c, "tls defaults %#x", -rc); goto fail; } mbedtls_ssl_conf_rng(&tls->conf, mbed_rng, c); if (opts->ca == NULL || strcmp(opts->ca, "*") == 0) { mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_NONE); } if (opts->ca != NULL && opts->ca[0] != '\0') { #if defined(MBEDTLS_X509_CA_CHAIN_ON_DISK) tls->cafile = strdup(opts->ca); rc = mbedtls_ssl_conf_ca_chain_file(&tls->conf, tls->cafile, NULL); if (rc != 0) { mg_error(c, "parse on-disk chain(%s) err %#x", opts->ca, -rc); goto fail; } #else mbedtls_x509_crt_init(&tls->ca); if ((rc = mbedtls_x509_crt_parse_file(&tls->ca, opts->ca)) != 0) { mg_error(c, "parse(%s) err %#x", opts->ca, -rc); goto fail; } mbedtls_ssl_conf_ca_chain(&tls->conf, &tls->ca, NULL); #endif mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_REQUIRED); } if (opts->cert != NULL && opts->cert[0] != '\0') { const char *key = opts->certkey; if (key == NULL) key = opts->cert; mbedtls_x509_crt_init(&tls->cert); mbedtls_pk_init(&tls->pk); if ((rc = mbedtls_x509_crt_parse_file(&tls->cert, opts->cert)) != 0) { mg_error(c, "parse(%s) err %#x", opts->cert, -rc); goto fail; } if ((rc = mbedtls_pk_parse_keyfile(&tls->pk, key, NULL)) != 0) { mg_error(c, "tls key(%s) %#x", key, -rc); goto fail; } rc = mbedtls_ssl_conf_own_cert(&tls->conf, &tls->cert, &tls->pk); if (rc != 0) { mg_error(c, "own cert %#x", -rc); goto fail; } } if ((rc = mbedtls_ssl_setup(&tls->ssl, &tls->conf)) != 0) { mg_error(c, "setup err %#x", -rc); goto fail; } c->tls = tls; c->is_tls = 1; c->is_tls_hs = 1; if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) { mg_tls_handshake(c); } return 1; fail: c->is_closing = 1; free(tls); return 0; } int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) { struct mg_tls *tls = (struct mg_tls *) c->tls; int n = mbedtls_ssl_read(&tls->ssl, (unsigned char *) buf, len); *fail = (n == 0) || (n < 0 && n != MBEDTLS_ERR_SSL_WANT_READ); return n; } int mg_tls_send(struct mg_connection *c, const void *buf, size_t len, int *fail) { struct mg_tls *tls = (struct mg_tls *) c->tls; int n = mbedtls_ssl_write(&tls->ssl, (unsigned char *) buf, len); *fail = (n == 0) || (n < 0 && n != MBEDTLS_ERR_SSL_WANT_WRITE); return n; } int mg_tls_free(struct mg_connection *c) { struct mg_tls *tls = (struct mg_tls *) c->tls; if (tls == NULL) return 0; free(tls->cafile); mbedtls_x509_crt_free(&tls->ca); mbedtls_x509_crt_free(&tls->cert); mbedtls_ssl_free(&tls->ssl); mbedtls_pk_free(&tls->pk); mbedtls_ssl_config_free(&tls->conf); free(tls); return 1; } #elif MG_ENABLE_OPENSSL ///////////////////////////////////////// OPENSSL #include #include #include struct mg_tls { SSL_CTX *ctx; SSL *ssl; }; static int mg_tls_err(struct mg_tls *tls, int res) { int err = SSL_get_error(tls->ssl, res); // We've just fetched the last error from the queue. // Now we need to clear the error queue. If we do not, then the following // can happen (actually reported): // - A new connection is accept()-ed with cert error (e.g. self-signed cert) // - Since all accept()-ed connections share listener's context, // - *ALL* SSL accepted connection report read error on the next poll cycle. // Thus a single errored connection can close all the rest, unrelated ones. // Clearing the error keeps the shared SSL_CTX in an OK state. ERR_clear_error(); if (err == SSL_ERROR_WANT_READ) return 0; if (err == SSL_ERROR_WANT_WRITE) return 0; return err; } int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) { struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls)); const char *id = "mongoose"; static unsigned char s_initialised = 0; int rc; if (!s_initialised) { SSL_library_init(); s_initialised++; } LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id, opts->ca == NULL ? "null" : opts->ca, opts->cert == NULL ? "null" : opts->cert, opts->certkey == NULL ? "null" : opts->certkey)); tls->ctx = c->is_client ? SSL_CTX_new(SSLv23_client_method()) : SSL_CTX_new(SSLv23_server_method()); if ((tls->ssl = SSL_new(tls->ctx)) == NULL) { mg_error(c, "SSL_new"); goto fail; } SSL_set_session_id_context(tls->ssl, (const uint8_t *) id, strlen(id)); // Disable deprecated protocols SSL_set_options(tls->ssl, SSL_OP_NO_SSLv2); SSL_set_options(tls->ssl, SSL_OP_NO_SSLv3); SSL_set_options(tls->ssl, SSL_OP_NO_TLSv1); #ifdef MG_ENABLE_OPENSSL_NO_COMPRESSION SSL_set_options(tls->ssl, SSL_OP_NO_COMPRESSION); #endif #ifdef MG_ENABLE_OPENSSL_CIPHER_SERVER_PREFERENCE SSL_set_options(tls->ssl, SSL_OP_CIPHER_SERVER_PREFERENCE); #endif if (opts->ca != NULL && opts->ca[0] != '\0') { if ((rc = SSL_CTX_load_verify_locations(tls->ctx, opts->ca, NULL)) != 1) { mg_error(c, "parse(%s): err %d", opts->ca, mg_tls_err(tls, rc)); goto fail; } SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT, 0); } if (opts->cert != NULL && opts->cert[0] != '\0') { const char *key = opts->certkey; if (key == NULL) key = opts->cert; if ((rc = SSL_use_certificate_file(tls->ssl, opts->cert, 1)) != 1) { mg_error(c, "Invalid SSL cert, err %d", mg_tls_err(tls, rc)); goto fail; } else if ((rc = SSL_use_PrivateKey_file(tls->ssl, key, 1)) != 1) { mg_error(c, "Invalid SSL key, err %d", mg_tls_err(tls, rc)); goto fail; #if OPENSSL_VERSION_NUMBER > 0x10002000L } else if ((rc = SSL_use_certificate_chain_file(tls->ssl, opts->cert)) != 1) { mg_error(c, "Invalid CA, err %d", mg_tls_err(tls, rc)); goto fail; #endif } else { SSL_set_mode(tls->ssl, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER); #if OPENSSL_VERSION_NUMBER > 0x10002000L SSL_set_ecdh_auto(tls->ssl, 1); #endif } } if (opts->ciphers != NULL) SSL_set_cipher_list(tls->ssl, opts->ciphers); if (opts->srvname != NULL) SSL_set_tlsext_host_name(tls->ssl, opts->srvname); c->tls = tls; c->is_tls = 1; c->is_tls_hs = 1; if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) { mg_tls_handshake(c); } c->is_hexdumping = 1; LOG(LL_INFO, ("SSL SETUP OK, %s", c->is_accepted ? "accepted" : "client")); return 1; fail: c->is_closing = 1; free(tls); return 0; } int mg_tls_handshake(struct mg_connection *c) { struct mg_tls *tls = (struct mg_tls *) c->tls; int rc; SSL_set_fd(tls->ssl, (int) c->fd); rc = c->is_client ? SSL_connect(tls->ssl) : SSL_accept(tls->ssl); if (rc == 1) { LOG(LL_DEBUG, ("%lu success", c->id)); c->is_tls_hs = 0; return 1; } else { ERR_print_errors_fp(stderr); int code = mg_tls_err(tls, rc); if (code != 0) mg_error(c, "tls hs: rc %d, err %d", rc, code); return 0; } } int mg_tls_free(struct mg_connection *c) { struct mg_tls *tls = (struct mg_tls *) c->tls; if (tls == NULL) return 0; SSL_free(tls->ssl); SSL_CTX_free(tls->ctx); free(tls); return 1; } int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) { struct mg_tls *tls = (struct mg_tls *) c->tls; int n = SSL_read(tls->ssl, buf, len); *fail = (n == 0) || (n < 0 && mg_tls_err(tls, n) != 0); return n; } int mg_tls_send(struct mg_connection *c, const void *buf, size_t len, int *fail) { struct mg_tls *tls = (struct mg_tls *) c->tls; int n = SSL_write(tls->ssl, buf, len); *fail = (n == 0) || (n < 0 && mg_tls_err(tls, n) != 0); return n; } #else ////////////////////////////////////////// NO TLS int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) { (void) opts; mg_error(c, "TLS is not enabled"); return 0; } int mg_tls_handshake(struct mg_connection *c) { return c != NULL; } int mg_tls_free(struct mg_connection *c) { return c != NULL; } int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) { *fail = 1; return c == NULL || buf == NULL || len == 0 ? 0 : -1; } int mg_tls_send(struct mg_connection *c, const void *buf, size_t len, int *fail) { *fail = 1; return c == NULL || buf == NULL || len == 0 ? 0 : -1; } #endif #ifdef MG_ENABLE_LINES #line 1 "src/url.c" #endif #include struct url { int key, user, pass, host, port, uri, end; }; int mg_url_is_ssl(const char *url) { return strncmp(url, "wss:", 4) == 0 || strncmp(url, "https:", 6) == 0 || strncmp(url, "mqtts:", 6) == 0 || strncmp(url, "ssl:", 4) == 0 || strncmp(url, "tls:", 4) == 0; } static struct url urlparse(const char *url) { int i; struct url u; memset(&u, 0, sizeof(u)); for (i = 0; url[i] != '\0'; i++) { if (i > 0 && url[i - 1] == '/' && url[i] == '/') { u.host = i + 1; u.port = 0; } else if (url[i] == ']') { u.port = 0; // IPv6 URLs, like http://[::1]/bar } else if (url[i] == ':') { u.port = i + 1; } else if (url[i] == '@') { u.user = u.host; u.pass = u.port; u.host = i + 1; u.port = 0; } else if (u.host && !u.uri && url[i] == '/') { u.uri = i; } } u.end = i; #if 0 printf("[%s] %d %d %d %d %d\n", url, u.user, u.pass, u.host, u.port, u.uri); #endif return u; } struct mg_str mg_url_host(const char *url) { struct url u = urlparse(url); int n = u.port ? u.port - u.host - 1 : u.uri ? u.uri - u.host : u.end - u.host; struct mg_str s = mg_str_n(url + u.host, n); if (s.len > 2 && s.ptr[0] == '[' && s.ptr[s.len - 1] == ']') { s.len -= 2; s.ptr++; } return s; } const char *mg_url_uri(const char *url) { struct url u = urlparse(url); return u.uri ? url + u.uri : "/"; } unsigned short mg_url_port(const char *url) { struct url u = urlparse(url); unsigned short port = 0; if (memcmp(url, "http:", 5) == 0) port = 80; if (memcmp(url, "wss:", 4) == 0 || memcmp(url, "https:", 6) == 0) port = 443; if (memcmp(url, "mqtt:", 5) == 0) port = 1883; if (memcmp(url, "mqtts:", 6) == 0) port = 8883; if (u.port) port = atoi(url + u.port); return port; } struct mg_str mg_url_user(const char *url) { struct url u = urlparse(url); struct mg_str s = mg_str(""); if (u.user && (u.pass || u.host)) { int n = u.pass ? u.pass - u.user - 1 : u.host - u.user - 1; s = mg_str_n(url + u.user, n); } return s; } struct mg_str mg_url_pass(const char *url) { struct url u = urlparse(url); struct mg_str s = mg_str(""); if (u.pass && u.host) { int n = u.host - u.pass - 1; s = mg_str_n(url + u.pass, n); } return s; } #ifdef MG_ENABLE_LINES #line 1 "src/util.c" #endif size_t mg_file_size(const char *path) { #if MG_ARCH == MG_ARCH_FREERTOS struct FF_STAT st; return ff_stat(path, &st) == 0 ? st.st_size : 0; #else struct stat st; return stat(path, &st) == 0 ? st.st_size : 0; #endif } char *mg_file_read(const char *path) { FILE *fp; char *data = NULL; size_t size = mg_file_size(path); if ((fp = fopen(path, "rb")) != NULL) { data = (char *) malloc(size + 1); if (data != NULL) { if (fread(data, 1, size, fp) != size) { free(data); data = NULL; } else { data[size] = '\0'; } } fclose(fp); } return data; } int mg_file_write(const char *path, const char *fmt, ...) { char tmp[100]; int written = 0; FILE *fp; snprintf(tmp, sizeof(tmp), "%s.%d", path, rand()); fp = fopen(tmp, "wb"); if (fp != NULL) { va_list ap; va_start(ap, fmt); written = vfprintf(fp, fmt, ap); va_end(ap); fclose(fp); remove(path); rename(tmp, path); } return written; } void mg_random(void *buf, size_t len) { FILE *fp = fopen("/dev/urandom", "rb"); size_t i, n = 0; if (fp != NULL) n = fread(buf, 1, len, fp); if (fp == NULL || n <= 0) { for (i = 0; i < len; i++) ((unsigned char *) buf)[i] = rand() % 0xff; } if (fp != NULL) fclose(fp); } bool mg_globmatch(const char *s1, int n1, const char *s2, int n2) { int i = 0, j = 0, ni = 0, nj = 0; while (i < n1 || j < n2) { if (i < n1 && j < n2 && (s1[i] == '?' || s2[j] == s1[i])) { i++, j++; } else if (i < n1 && (s1[i] == '*' || s1[i] == '#')) { ni = i, nj = j + 1, i++; } else if (nj > 0 && nj <= n2 && (s1[i - 1] == '#' || s2[j] != '/')) { i = ni, j = nj; } else { return false; } } return true; } static int mg_nextcommaentry(const char *s, int slen, int ofs, int *koff, int *klen, int *voff, int *vlen) { int kvlen, kl; for (kvlen = 0; ofs + kvlen < slen && s[ofs + kvlen] != ',';) kvlen++; for (kl = 0; kl < kvlen && s[ofs + kl] != '=';) kl++; if (koff != NULL) *koff = ofs; if (klen != NULL) *klen = kl; if (voff != NULL) *voff = kl < kvlen ? ofs + kl + 1 : 0; if (vlen != NULL) *vlen = kl < kvlen ? kvlen - kl - 1 : 0; return ofs >= slen ? slen : ofs + kvlen + 1; } bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v) { int koff, klen, voff, vlen; int off = mg_nextcommaentry(s->ptr, s->len, 0, &koff, &klen, &voff, &vlen); if (k != NULL) *k = mg_str_n(s->ptr + koff, klen); if (v != NULL) *v = mg_str_n(s->ptr + voff, vlen); *s = mg_str_n(s->ptr + off, s->len - off); return off > 0; } uint32_t mg_ntohl(uint32_t net) { uint8_t data[4] = {0, 0, 0, 0}; memcpy(&data, &net, sizeof(data)); return ((uint32_t) data[3] << 0) | ((uint32_t) data[2] << 8) | ((uint32_t) data[1] << 16) | ((uint32_t) data[0] << 24); } uint16_t mg_ntohs(uint16_t net) { uint8_t data[2] = {0, 0}; memcpy(&data, &net, sizeof(data)); return ((uint16_t) data[1] << 0) | ((uint32_t) data[0] << 8); } char *mg_hexdump(const void *buf, size_t len) { const unsigned char *p = (const unsigned char *) buf; size_t i, idx, n = 0, ofs = 0, dlen = len * 5 + 100; char ascii[17] = "", *dst = (char *) malloc(dlen); if (dst == NULL) return dst; for (i = 0; i < len; i++) { idx = i % 16; if (idx == 0) { if (i > 0 && dlen > n) n += snprintf(dst + n, dlen - n, " %s\n", ascii); if (dlen > n) n += snprintf(dst + n, dlen - n, "%04x ", (int) (i + ofs)); } if (dlen < n) break; n += snprintf(dst + n, dlen - n, " %02x", p[i]); ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]; ascii[idx + 1] = '\0'; } while (i++ % 16) { if (n < dlen) n += snprintf(dst + n, dlen - n, "%s", " "); } if (n < dlen) n += snprintf(dst + n, dlen - n, " %s\n", ascii); if (n > dlen - 1) n = dlen - 1; dst[n] = '\0'; return dst; } char *mg_hex(const void *buf, int len, char *to) { const unsigned char *p = (const unsigned char *) buf; static const char *hex = "0123456789abcdef"; int i = 0; for (; len--; p++) { to[i++] = hex[p[0] >> 4]; to[i++] = hex[p[0] & 0x0f]; } to[i] = '\0'; return to; } unsigned long mg_unhexn(const char *s, int len) { unsigned long i = 0, v = 0; for (i = 0; i < (unsigned long) len; i++) { int c = s[i]; if (i > 0) v <<= 4; v |= (c >= '0' && c <= '9') ? c - '0' : (c >= 'A' && c <= 'F') ? c - '7' : c - 'W'; } return v; } void mg_unhex(const char *buf, int len, unsigned char *to) { int i; for (i = 0; i < len; i += 2) { to[i >> 1] = (unsigned char) mg_unhexn(&buf[i], 2); } } int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap) { va_list ap_copy; int len; va_copy(ap_copy, ap); len = vsnprintf(*buf, size, fmt, ap_copy); va_end(ap_copy); if (len < 0) { // eCos and Windows are not standard-compliant and return -1 when // the buffer is too small. Keep allocating larger buffers until we // succeed or out of memory. // LCOV_EXCL_START *buf = NULL; while (len < 0) { free(*buf); if (size == 0) size = 5; size *= 2; if ((*buf = (char *) malloc(size)) == NULL) { len = -1; break; } va_copy(ap_copy, ap); len = vsnprintf(*buf, size - 1, fmt, ap_copy); va_end(ap_copy); } // Microsoft version of vsnprintf() is not always null-terminated, so put // the terminator manually if (*buf != NULL) (*buf)[len] = 0; // LCOV_EXCL_STOP } else if (len >= (int) size) { /// Standard-compliant code path. Allocate a buffer that is large enough if ((*buf = (char *) malloc(len + 1)) == NULL) { len = -1; // LCOV_EXCL_LINE } else { // LCOV_EXCL_LINE va_copy(ap_copy, ap); len = vsnprintf(*buf, len + 1, fmt, ap_copy); va_end(ap_copy); } } return len; } int mg_asprintf(char **buf, size_t size, const char *fmt, ...) { int ret; va_list ap; va_start(ap, fmt); ret = mg_vasprintf(buf, size, fmt, ap); va_end(ap); return ret; } int64_t mg_to64(struct mg_str str) { int64_t result = 0, neg = 1; size_t i = 0; while (i < str.len && (str.ptr[i] == ' ' || str.ptr[i] == '\t')) i++; if (i < str.len && str.ptr[i] == '-') neg = -1, i++; while (i < str.len && str.ptr[i] >= '0' && str.ptr[i] <= '9') { result *= 10; result += (str.ptr[i] - '0'); i++; } return result * neg; } double mg_time(void) { #if MG_ARCH == MG_ARCH_WIN32 SYSTEMTIME sysnow; FILETIME ftime; GetLocalTime(&sysnow); SystemTimeToFileTime(&sysnow, &ftime); /* * 1. VC 6.0 doesn't support conversion uint64 -> double, so, using int64 * This should not cause a problems in this (21th) century * 2. Windows FILETIME is a number of 100-nanosecond intervals since January * 1, 1601 while time_t is a number of _seconds_ since January 1, 1970 UTC, * thus, we need to convert to seconds and adjust amount (subtract 11644473600 * seconds) */ return (double) (((int64_t) ftime.dwLowDateTime + ((int64_t) ftime.dwHighDateTime << 32)) / 10000000.0) - 11644473600; #else struct timeval tv; if (gettimeofday(&tv, NULL /* tz */) != 0) return 0; return (double) tv.tv_sec + (((double) tv.tv_usec) / 1000000.0); #endif /* _WIN32 */ } void mg_usleep(unsigned long usecs) { #if MG_ARCH == MG_ARCH_WIN32 Sleep(usecs / 1000); #elif MG_ARCH == MG_ARCH_ESP8266 ets_delay_us(usecs); #else usleep(usecs); #endif } unsigned long mg_millis(void) { #if MG_ARCH == MG_ARCH_WIN32 return GetTickCount(); #elif MG_ARCH == MG_ARCH_ESP32 return esp_timer_get_time() / 1000; #elif MG_ARCH == MG_ARCH_ESP8266 // return system_get_time() / 1000; return xTaskGetTickCount() * portTICK_PERIOD_MS; #elif MG_ARCH == MG_ARCH_FREERTOS return xTaskGetTickCount() * portTICK_PERIOD_MS; #else struct timespec ts; clock_gettime(CLOCK_REALTIME, &ts); return ts.tv_sec * 1000 + ts.tv_nsec / 1000000; #endif } #ifdef MG_ENABLE_LINES #line 1 "src/ws.c" #endif struct ws_msg { uint8_t flags; size_t header_len; size_t data_len; }; static void ws_handshake(struct mg_connection *c, const char *key, size_t key_len) { const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; unsigned char sha[20], b64_sha[30]; // mem[256], *buf = mem; // int len = 0; mg_sha1_ctx sha_ctx; mg_sha1_init(&sha_ctx); mg_sha1_update(&sha_ctx, (unsigned char *) key, key_len); mg_sha1_update(&sha_ctx, (unsigned char *) magic, 36); mg_sha1_final(sha, &sha_ctx); mg_base64_encode(sha, sizeof(sha), (char *) b64_sha); mg_printf(c, "HTTP/1.1 101 Switching Protocols\r\n" "Upgrade: websocket\r\n" "Connection: Upgrade\r\n" "Sec-WebSocket-Accept: %s\r\n\r\n", b64_sha); // mg_send(c, buf, len); // if (buf != mem) free(buf); } static size_t ws_process(uint8_t *buf, size_t len, struct ws_msg *msg) { size_t i, n = 0, mask_len = 0; memset(msg, 0, sizeof(*msg)); if (len >= 2) { n = buf[1] & 0x7f; mask_len = buf[1] & WEBSOCKET_FLAGS_MASK_FIN ? 4 : 0; msg->flags = *(unsigned char *) buf; if (n < 126 && len >= mask_len) { msg->data_len = n; msg->header_len = 2 + mask_len; } else if (n == 126 && len >= 4 + mask_len) { msg->header_len = 4 + mask_len; msg->data_len = mg_ntohs(*(uint16_t *) &buf[2]); } else if (len >= 10 + mask_len) { msg->header_len = 10 + mask_len; msg->data_len = (int) (((uint64_t) mg_ntohl(*(uint32_t *) &buf[2])) << 32) + mg_ntohl(*(uint32_t *) &buf[6]); } } if (msg->header_len + msg->data_len > len) return 0; if (mask_len > 0) { uint8_t *p = buf + msg->header_len, *m = p - mask_len; for (i = 0; i < msg->data_len; i++) p[i] ^= m[i & 3]; } return msg->header_len + msg->data_len; } size_t mg_ws_send(struct mg_connection *c, const char *buf, size_t len, int op) { unsigned char header[10], mask[4]; size_t i, header_len = 0; header[0] = (uint8_t)(op | WEBSOCKET_FLAGS_MASK_FIN); if (len < 126) { header[1] = (unsigned char) len; header_len = 2; } else if (len < 65536) { uint16_t tmp = mg_htons((uint16_t) len); header[1] = 126; memcpy(&header[2], &tmp, sizeof(tmp)); header_len = 4; } else { uint32_t tmp; header[1] = 127; tmp = mg_htonl((uint32_t)((uint64_t) len >> 32)); memcpy(&header[2], &tmp, sizeof(tmp)); tmp = mg_htonl((uint32_t)(len & 0xffffffff)); memcpy(&header[6], &tmp, sizeof(tmp)); header_len = 10; } if (c->is_client) header[1] |= 1 << 7; // Set masking flag mg_send(c, header, header_len); if (c->is_client) { mg_random(mask, sizeof(mask)); mg_send(c, mask, sizeof(mask)); header_len += sizeof(mask); } LOG(LL_VERBOSE_DEBUG, ("WS out: %d [%.*s]", (int) len, (int) len, buf)); mg_send(c, buf, len); if (c->is_client) { uint8_t *p = c->send.buf + c->send.len - len; for (i = 0; i < len; i++) p[i] ^= mask[i & 3]; } return header_len + len; } static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) { struct ws_msg msg; if (ev == MG_EV_READ) { if (!c->is_websocket && c->is_client) { int n = mg_http_get_request_len(c->recv.buf, c->recv.len); if (n < 0) { c->is_closing = 1; // Some just, not an HTTP request } else if (n > 0) { if (n < 15 || memcmp(c->recv.buf + 9, "101", 3) != 0) { LOG(LL_ERROR, ("%lu WS handshake error: %.*s", c->id, 15, c->recv.buf)); c->is_closing = 1; } else { c->is_websocket = 1; mg_call(c, MG_EV_WS_OPEN, NULL); } mg_iobuf_delete(&c->recv, n); } else { return; // A request is not yet received } } while (ws_process(c->recv.buf, c->recv.len, &msg) > 0) { char *s = (char *) c->recv.buf + msg.header_len; struct mg_ws_message m = {{s, msg.data_len}, msg.flags}; switch (msg.flags & WEBSOCKET_FLAGS_MASK_OP) { case WEBSOCKET_OP_PING: LOG(LL_DEBUG, ("%s", "WS PONG")); mg_ws_send(c, s, msg.data_len, WEBSOCKET_OP_PONG); mg_call(c, MG_EV_WS_CTL, &m); break; case WEBSOCKET_OP_PONG: mg_call(c, MG_EV_WS_CTL, &m); break; case WEBSOCKET_OP_CLOSE: LOG(LL_ERROR, ("%lu Got WS CLOSE", c->id)); mg_call(c, MG_EV_WS_CTL, &m); c->is_closing = 1; return; default: { mg_call(c, MG_EV_WS_MSG, &m); break; } } mg_iobuf_delete(&c->recv, msg.header_len + msg.data_len); } } (void) fn_data; (void) ev_data; } struct mg_connection *mg_ws_connect(struct mg_mgr *mgr, const char *url, mg_event_handler_t fn, void *fn_data, const char *fmt, ...) { struct mg_connection *c = mg_connect(mgr, url, fn, fn_data); if (c != NULL) { char nonce[16], key[30], mem1[128], mem2[256], *buf1 = mem1, *buf2 = mem2; struct mg_str host = mg_url_host(url); int n1 = 0, n2 = 0; if (fmt != NULL) { va_list ap; va_start(ap, fmt); n1 = mg_vasprintf(&buf1, sizeof(mem1), fmt, ap); va_end(ap); } // Send handshake request // mg_url_host(url, host, sizeof(host)); mg_random(nonce, sizeof(nonce)); mg_base64_encode((unsigned char *) nonce, sizeof(nonce), key); // LOG(LL_DEBUG, "%p [%s]", uri, uri == NULL ? "???" : uri); n2 = mg_asprintf(&buf2, sizeof(mem2), "GET %s HTTP/1.1\r\n" "Upgrade: websocket\r\n" "Host: %.*s\r\n" "Connection: Upgrade\r\n" "%.*s" "Sec-WebSocket-Version: 13\r\n" "Sec-WebSocket-Key: %s\r\n" "\r\n", mg_url_uri(url), (int) host.len, host.ptr, n1, buf1, key); mg_send(c, buf2, n2); if (buf1 != mem1) free(buf1); if (buf2 != mem2) free(buf2); c->pfn = mg_ws_cb; c->fn_data = fn_data; } return c; } void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm) { struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key"); c->pfn = mg_ws_cb; if (wskey != NULL) ws_handshake(c, wskey->ptr, wskey->len); c->is_websocket = 1; }