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mongoose/mongoose.c

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// Copyright (c) 2004-2013 Sergey Lyubka
// Copyright (c) 2013-2022 Cesanta Software Limited
// All rights reserved
//
// This software is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see http://www.gnu.org/licenses/
//
// You are free to use this software under the terms of the GNU General
// Public License, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU General Public License for more details.
//
// Alternatively, you can license this software under a commercial
// license, as set out in https://www.mongoose.ws/licensing/
//
// SPDX-License-Identifier: GPL-2.0 or commercial
#include "mongoose.h"
#ifdef MG_ENABLE_LINES
#line 1 "src/base64.c"
#endif
#include <string.h>
static int mg_b64idx(int c) {
if (c < 26) {
return c + 'A';
} else if (c < 52) {
return c - 26 + 'a';
} else if (c < 62) {
return c - 52 + '0';
} else {
return c == 62 ? '+' : '/';
}
}
static int mg_b64rev(int c) {
if (c >= 'A' && c <= 'Z') {
return c - 'A';
} else if (c >= 'a' && c <= 'z') {
return c + 26 - 'a';
} else if (c >= '0' && c <= '9') {
return c + 52 - '0';
} else if (c == '+') {
return 62;
} else if (c == '/') {
return 63;
} else if (c == '=') {
return 64;
} else {
return -1;
}
}
int mg_base64_update(unsigned char ch, char *to, int n) {
int rem = (n & 3) % 3;
if (rem == 0) {
to[n] = (char) mg_b64idx(ch >> 2);
to[++n] = (char) ((ch & 3) << 4);
} else if (rem == 1) {
to[n] = (char) mg_b64idx(to[n] | (ch >> 4));
to[++n] = (char) ((ch & 15) << 2);
} else {
to[n] = (char) mg_b64idx(to[n] | (ch >> 6));
to[++n] = (char) mg_b64idx(ch & 63);
n++;
}
return n;
}
int mg_base64_final(char *to, int n) {
int saved = n;
// printf("---[%.*s]\n", n, to);
if (n & 3) n = mg_base64_update(0, to, n);
if ((saved & 3) == 2) n--;
// printf(" %d[%.*s]\n", n, n, to);
while (n & 3) to[n++] = '=';
to[n] = '\0';
return n;
}
int mg_base64_encode(const unsigned char *p, int n, char *to) {
int i, len = 0;
for (i = 0; i < n; i++) len = mg_base64_update(p[i], to, len);
len = mg_base64_final(to, len);
return len;
}
int mg_base64_decode(const char *src, int n, char *dst) {
const char *end = src + 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++] = (char) ((a << 2) | (b >> 4));
if (src[2] != '=') {
dst[len++] = (char) ((b << 4) | (c >> 2));
if (src[3] != '=') dst[len++] = (char) ((c << 6) | d);
}
src += 4;
}
dst[len] = '\0';
return len;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/dns.c"
#endif
struct dns_data {
struct dns_data *next;
struct mg_connection *c;
uint64_t expire;
uint16_t txnid;
};
static void mg_sendnsreq(struct mg_connection *, struct mg_str *, int,
struct mg_dns *, bool);
static void mg_dns_free(struct mg_connection *c, struct dns_data *d) {
LIST_DELETE(struct dns_data,
(struct dns_data **) &c->mgr->active_dns_requests, d);
free(d);
}
void mg_resolve_cancel(struct mg_connection *c) {
struct dns_data *tmp, *d = (struct dns_data *) c->mgr->active_dns_requests;
for (; d != NULL; d = tmp) {
tmp = d->next;
if (d->c == c) mg_dns_free(c, d);
}
}
static size_t mg_dns_parse_name_depth(const uint8_t *s, size_t len, size_t ofs,
char *to, size_t tolen, size_t j,
int depth) {
size_t i = 0;
if (tolen > 0 && depth == 0) to[0] = '\0';
if (depth > 5) return 0;
// MG_INFO(("ofs %lx %x %x", (unsigned long) ofs, s[ofs], s[ofs + 1]));
while (ofs + i + 1 < len) {
size_t n = s[ofs + i];
if (n == 0) {
i++;
break;
}
if (n & 0xc0) {
size_t ptr = (((n & 0x3f) << 8) | s[ofs + i + 1]); // 12 is hdr len
// MG_INFO(("PTR %lx", (unsigned long) ptr));
if (ptr + 1 < len && (s[ptr] & 0xc0) == 0 &&
mg_dns_parse_name_depth(s, len, ptr, to, tolen, j, depth + 1) == 0)
return 0;
i += 2;
break;
}
if (ofs + i + n + 1 >= len) return 0;
if (j > 0) {
if (j < tolen) to[j] = '.';
j++;
}
if (j + n < tolen) memcpy(&to[j], &s[ofs + i + 1], n);
j += n;
i += n + 1;
if (j < tolen) to[j] = '\0'; // Zero-terminate this chunk
// MG_INFO(("--> [%s]", to));
}
if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term
return i;
}
static size_t mg_dns_parse_name(const uint8_t *s, size_t n, size_t ofs,
char *dst, size_t dstlen) {
return mg_dns_parse_name_depth(s, n, ofs, dst, dstlen, 0, 0);
}
size_t mg_dns_parse_rr(const uint8_t *buf, size_t len, size_t ofs,
bool is_question, struct mg_dns_rr *rr) {
const uint8_t *s = buf + ofs, *e = &buf[len];
memset(rr, 0, sizeof(*rr));
if (len < sizeof(struct mg_dns_header)) return 0; // Too small
if (len > 512) return 0; // Too large, we don't expect that
if (s >= e) return 0; // Overflow
if ((rr->nlen = (uint16_t) mg_dns_parse_name(buf, len, ofs, NULL, 0)) == 0)
return 0;
s += rr->nlen + 4;
if (s > e) return 0;
rr->atype = (uint16_t) (((uint16_t) s[-4] << 8) | s[-3]);
rr->aclass = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]);
if (is_question) return (size_t) (rr->nlen + 4);
s += 6;
if (s > e) return 0;
rr->alen = (uint16_t) (((uint16_t) s[-2] << 8) | s[-1]);
if (s + rr->alen > e) return 0;
return (size_t) (rr->nlen + rr->alen + 10);
}
bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) {
const struct mg_dns_header *h = (struct mg_dns_header *) buf;
struct mg_dns_rr rr;
size_t i, n, ofs = sizeof(*h);
memset(dm, 0, sizeof(*dm));
if (len < sizeof(*h)) return 0; // Too small, headers dont fit
if (mg_ntohs(h->num_questions) > 1) return 0; // Sanity
if (mg_ntohs(h->num_answers) > 10) return 0; // Sanity
dm->txnid = mg_ntohs(h->txnid);
for (i = 0; i < mg_ntohs(h->num_questions); i++) {
if ((n = mg_dns_parse_rr(buf, len, ofs, true, &rr)) == 0) return false;
// MG_INFO(("Q %lu %lu %hu/%hu", ofs, n, rr.atype, rr.aclass));
ofs += n;
}
for (i = 0; i < mg_ntohs(h->num_answers); i++) {
if ((n = mg_dns_parse_rr(buf, len, ofs, false, &rr)) == 0) return false;
// MG_INFO(("A -- %lu %lu %hu/%hu %s", ofs, n, rr.atype, rr.aclass,
// dm->name));
mg_dns_parse_name(buf, len, ofs, dm->name, sizeof(dm->name));
ofs += n;
if (rr.alen == 4 && rr.atype == 1 && rr.aclass == 1) {
dm->addr.is_ip6 = false;
memcpy(&dm->addr.ip, &buf[ofs - 4], 4);
dm->resolved = true;
break; // Return success
} else if (rr.alen == 16 && rr.atype == 28 && rr.aclass == 1) {
dm->addr.is_ip6 = true;
memcpy(&dm->addr.ip6, &buf[ofs - 16], 16);
dm->resolved = true;
break; // Return success
}
}
return true;
}
static void dns_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
struct dns_data *d, *tmp;
if (ev == MG_EV_POLL) {
uint64_t now = *(uint64_t *) ev_data;
for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL;
d = tmp) {
tmp = d->next;
// MG_DEBUG ("%lu %lu dns poll", d->expire, now));
if (now > d->expire) mg_error(d->c, "DNS timeout");
}
} else if (ev == MG_EV_READ) {
struct mg_dns_message dm;
int resolved = 0;
if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) {
char *s = mg_hexdump(c->recv.buf, c->recv.len);
MG_ERROR(("Unexpected DNS response:\n%s\n", s));
free(s);
} else {
MG_VERBOSE(("%s %d", dm.name, dm.resolved));
for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL;
d = tmp) {
tmp = d->next;
// MG_INFO(("d %p %hu %hu", d, d->txnid, dm.txnid));
if (dm.txnid != d->txnid) continue;
if (d->c->is_resolving) {
if (dm.resolved) {
char buf[100];
dm.addr.port = d->c->rem.port; // Save port
d->c->rem = dm.addr; // Copy resolved address
MG_DEBUG(("%lu %s resolved to %s", d->c->id, dm.name,
mg_ntoa(&d->c->rem, buf, sizeof(buf))));
mg_connect_resolved(d->c);
#if MG_ENABLE_IPV6
} else if (dm.addr.is_ip6 == false && dm.name[0] != '\0') {
struct mg_str x = mg_str(dm.name);
mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true);
#endif
} else {
mg_error(d->c, "%s DNS lookup failed", dm.name);
}
} else {
MG_ERROR(("%lu already resolved", d->c->id));
}
mg_dns_free(c, d);
resolved = 1;
}
}
if (!resolved) MG_ERROR(("stray DNS reply"));
c->recv.len = 0;
} else if (ev == MG_EV_CLOSE) {
for (d = (struct dns_data *) c->mgr->active_dns_requests; d != NULL;
d = tmp) {
tmp = d->next;
mg_error(d->c, "DNS error");
mg_dns_free(c, d);
}
}
(void) fn_data;
}
static bool mg_dns_send(struct mg_connection *c, const struct mg_str *name,
uint16_t txnid, bool ipv6) {
struct {
struct mg_dns_header header;
uint8_t data[256];
} pkt;
size_t i, n;
memset(&pkt, 0, sizeof(pkt));
pkt.header.txnid = mg_htons(txnid);
pkt.header.flags = mg_htons(0x100);
pkt.header.num_questions = mg_htons(1);
for (i = n = 0; i < sizeof(pkt.data) - 5; i++) {
if (name->ptr[i] == '.' || i >= name->len) {
pkt.data[n] = (uint8_t) (i - n);
memcpy(&pkt.data[n + 1], name->ptr + n, i - n);
n = i + 1;
}
if (i >= name->len) break;
}
memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5); // A query
n += 5;
if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query
// memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query
// n += 6;
return mg_send(c, &pkt, sizeof(pkt.header) + n);
}
static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
struct mg_dns *dnsc, bool ipv6) {
struct dns_data *d = NULL;
if (dnsc->url == NULL) {
mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()");
} else if (dnsc->c == NULL) {
dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL);
if (dnsc->c != NULL) {
dnsc->c->pfn = dns_cb;
// dnsc->c->is_hexdumping = 1;
}
}
if (dnsc->c == NULL) {
mg_error(c, "resolver");
} else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) {
mg_error(c, "resolve OOM");
} else {
struct dns_data *reqs = (struct dns_data *) c->mgr->active_dns_requests;
char buf[100];
d->txnid = reqs ? (uint16_t) (reqs->txnid + 1) : 1;
d->next = (struct dns_data *) c->mgr->active_dns_requests;
c->mgr->active_dns_requests = d;
d->expire = mg_millis() + (uint64_t) ms;
d->c = c;
c->is_resolving = 1;
MG_VERBOSE(("%lu resolving %.*s @ %s, txnid %hu", c->id, (int) name->len,
name->ptr, mg_ntoa(&dnsc->c->rem, buf, sizeof(buf)), d->txnid));
if (!mg_dns_send(dnsc->c, name, d->txnid, ipv6)) {
mg_error(dnsc->c, "DNS send");
}
}
}
void mg_resolve(struct mg_connection *c, const char *url) {
struct mg_str host = mg_url_host(url);
c->rem.port = mg_htons(mg_url_port(url));
if (mg_aton(host, &c->rem)) {
// host is an IP address, do not fire name resolution
mg_connect_resolved(c);
} else {
// host is not an IP, send DNS resolution request
mg_sendnsreq(c, &host, c->mgr->dnstimeout, &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) {
// Run user-defined handler first, in order to give it an ability
// to intercept processing (e.g. clean input buffer) before the
// protocol handler kicks in
if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data);
if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data);
}
void mg_error(struct mg_connection *c, const char *fmt, ...) {
char mem[256], *buf = mem;
va_list ap;
va_start(ap, fmt);
mg_vasprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
MG_ERROR(("%lu %p %s", c->id, c->fd, buf));
c->is_closing = 1; // Set is_closing before sending MG_EV_CALL
mg_call(c, MG_EV_ERROR, buf); // Let user handler to override it
if (buf != mem) free(buf);
}
#ifdef MG_ENABLE_LINES
#line 1 "src/fs.c"
#endif
struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags) {
struct mg_fd *fd = (struct mg_fd *) calloc(1, sizeof(*fd));
if (fd != NULL) {
fd->fd = fs->op(path, flags);
fd->fs = fs;
if (fd->fd == NULL) {
free(fd);
fd = NULL;
}
}
return fd;
}
void mg_fs_close(struct mg_fd *fd) {
if (fd != NULL) {
fd->fs->cl(fd->fd);
free(fd);
}
}
char *mg_file_read(struct mg_fs *fs, const char *path, size_t *sizep) {
struct mg_fd *fd;
char *data = NULL;
size_t size = 0;
fs->st(path, &size, NULL);
if ((fd = mg_fs_open(fs, path, MG_FS_READ)) != NULL) {
data = (char *) calloc(1, size + 1);
if (data != NULL) {
if (fs->rd(fd->fd, data, size) != size) {
free(data);
data = NULL;
} else {
data[size] = '\0';
if (sizep != NULL) *sizep = size;
}
}
mg_fs_close(fd);
}
return data;
}
bool mg_file_write(struct mg_fs *fs, const char *path, const void *buf,
size_t len) {
bool result = false;
struct mg_fd *fd;
char tmp[MG_PATH_MAX];
mg_snprintf(tmp, sizeof(tmp), "%s..%d", path, rand());
if ((fd = mg_fs_open(fs, tmp, MG_FS_WRITE)) != NULL) {
result = fs->wr(fd->fd, buf, len) == len;
mg_fs_close(fd);
if (result) {
fs->rm(path);
fs->mv(tmp, path);
} else {
fs->rm(tmp);
}
}
return result;
}
bool mg_file_printf(struct mg_fs *fs, const char *path, const char *fmt, ...) {
char tmp[256], *buf = tmp;
bool result;
size_t len;
va_list ap;
va_start(ap, fmt);
len = mg_vasprintf(&buf, sizeof(tmp), fmt, ap);
va_end(ap);
result = mg_file_write(fs, path, buf, len > 0 ? (size_t) len : 0);
if (buf != tmp) free(buf);
return result;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/fs_fat.c"
#endif
#if MG_ENABLE_FATFS
#include <ff.h>
static int mg_days_from_epoch(int y, int m, int d) {
y -= m <= 2;
int era = y / 400;
int yoe = y - era * 400;
int doy = (153 * (m + (m > 2 ? -3 : 9)) + 2) / 5 + d - 1;
int doe = yoe * 365 + yoe / 4 - yoe / 100 + doy;
return era * 146097 + doe - 719468;
}
static time_t mg_timegm(const struct tm *t) {
int year = t->tm_year + 1900;
int month = t->tm_mon; // 0-11
if (month > 11) {
year += month / 12;
month %= 12;
} else if (month < 0) {
int years_diff = (11 - month) / 12;
year -= years_diff;
month += 12 * years_diff;
}
int x = mg_days_from_epoch(year, month + 1, t->tm_mday);
return 60 * (60 * (24L * x + t->tm_hour) + t->tm_min) + t->tm_sec;
}
static time_t ff_time_to_epoch(uint16_t fdate, uint16_t ftime) {
struct tm tm;
memset(&tm, 0, sizeof(struct tm));
tm.tm_sec = (ftime << 1) & 0x3e;
tm.tm_min = ((ftime >> 5) & 0x3f);
tm.tm_hour = ((ftime >> 11) & 0x1f);
tm.tm_mday = (fdate & 0x1f);
tm.tm_mon = ((fdate >> 5) & 0x0f) - 1;
tm.tm_year = ((fdate >> 9) & 0x7f) + 80;
return mg_timegm(&tm);
}
static int ff_stat(const char *path, size_t *size, time_t *mtime) {
FILINFO fi;
if (path[0] == '\0') {
if (size) *size = 0;
if (mtime) *mtime = 0;
return MG_FS_DIR;
} else if (f_stat(path, &fi) == 0) {
if (size) *size = (size_t) fi.fsize;
if (mtime) *mtime = ff_time_to_epoch(fi.fdate, fi.ftime);
return MG_FS_READ | MG_FS_WRITE | ((fi.fattrib & AM_DIR) ? MG_FS_DIR : 0);
} else {
return 0;
}
}
static void ff_list(const char *dir, void (*fn)(const char *, void *),
void *userdata) {
DIR d;
FILINFO fi;
if (f_opendir(&d, dir) == FR_OK) {
while (f_readdir(&d, &fi) == FR_OK && fi.fname[0] != '\0') {
if (!strcmp(fi.fname, ".") || !strcmp(fi.fname, "..")) continue;
fn(fi.fname, userdata);
}
f_closedir(&d);
}
}
static void *ff_open(const char *path, int flags) {
FIL f;
unsigned char mode = FA_READ;
if (flags & MG_FS_WRITE) mode |= FA_WRITE | FA_OPEN_ALWAYS | FA_OPEN_APPEND;
if (f_open(&f, path, mode) == 0) {
FIL *fp = calloc(1, sizeof(*fp));
*fp = f;
return fp;
} else {
return NULL;
}
}
static void ff_close(void *fp) {
if (fp != NULL) {
f_close((FIL *) fp);
free(fp);
}
}
static size_t ff_read(void *fp, void *buf, size_t len) {
unsigned n = 0, misalign = ((size_t) buf) & 3;
if (misalign) {
char aligned[4];
f_read((FIL *) fp, aligned, len > misalign ? misalign : len, &n);
memcpy(buf, aligned, n);
} else {
f_read((FIL *) fp, buf, len, &n);
}
return n;
}
static size_t ff_write(void *fp, const void *buf, size_t len) {
unsigned n = 0;
return f_write((FIL *) fp, (char *) buf, len, &n) == FR_OK ? n : 0;
}
static size_t ff_seek(void *fp, size_t offset) {
f_lseek((FIL *) fp, offset);
return offset;
}
static bool ff_rename(const char *from, const char *to) {
return f_rename(from, to) == FR_OK;
}
static bool ff_remove(const char *path) {
return f_unlink(path) == FR_OK;
}
static bool ff_mkdir(const char *path) {
return f_mkdir(path) == FR_OK;
}
struct mg_fs mg_fs_fat = {ff_stat, ff_list, ff_open, ff_close, ff_read,
ff_write, ff_seek, ff_rename, ff_remove, ff_mkdir};
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/fs_packed.c"
#endif
struct packed_file {
const char *data;
size_t size;
size_t pos;
};
const char *mg_unpack(const char *path, size_t *size, time_t *mtime);
const char *mg_unlist(size_t no);
#if MG_ENABLE_PACKED_FS
#else
const char *mg_unpack(const char *path, size_t *size, time_t *mtime) {
(void) path, (void) size, (void) mtime;
return NULL;
}
const char *mg_unlist(size_t no) {
(void) no;
return NULL;
}
#endif
static int is_dir_prefix(const char *prefix, size_t n, const char *path) {
// MG_INFO(("[%.*s] [%s] %c", (int) n, prefix, path, path[n]));
return n < strlen(path) && strncmp(prefix, path, n) == 0 &&
(n == 0 || path[n] == '/' || path[n - 1] == '/');
}
static int packed_stat(const char *path, size_t *size, time_t *mtime) {
const char *p;
size_t i, n = strlen(path);
if (mg_unpack(path, size, mtime)) return MG_FS_READ; // Regular file
// Scan all files. If `path` is a dir prefix for any of them, it's a dir
for (i = 0; (p = mg_unlist(i)) != NULL; i++) {
if (is_dir_prefix(path, n, p)) return MG_FS_DIR;
}
return 0;
}
static void packed_list(const char *dir, void (*fn)(const char *, void *),
void *userdata) {
char buf[256], tmp[sizeof(buf)];
const char *path, *begin, *end;
size_t i, n = strlen(dir);
tmp[0] = '\0'; // Previously listed entry
for (i = 0; (path = mg_unlist(i)) != NULL; i++) {
if (!is_dir_prefix(dir, n, path)) continue;
begin = &path[n + 1];
end = strchr(begin, '/');
if (end == NULL) end = begin + strlen(begin);
mg_snprintf(buf, sizeof(buf), "%.*s", (int) (end - begin), begin);
buf[sizeof(buf) - 1] = '\0';
// If this entry has been already listed, skip
// NOTE: we're assuming that file list is sorted alphabetically
if (strcmp(buf, tmp) == 0) continue;
fn(buf, userdata); // Not yet listed, call user function
strcpy(tmp, buf); // And save this entry as listed
}
}
static void *packed_open(const char *path, int flags) {
size_t size = 0;
const char *data = mg_unpack(path, &size, NULL);
struct packed_file *fp = NULL;
if (data == NULL) return NULL;
if (flags & MG_FS_WRITE) return NULL;
fp = (struct packed_file *) calloc(1, sizeof(*fp));
fp->size = size;
fp->data = data;
return (void *) fp;
}
static void packed_close(void *fp) {
if (fp != NULL) free(fp);
}
static size_t packed_read(void *fd, void *buf, size_t len) {
struct packed_file *fp = (struct packed_file *) fd;
if (fp->pos + len > fp->size) len = fp->size - fp->pos;
memcpy(buf, &fp->data[fp->pos], len);
fp->pos += len;
return len;
}
static size_t packed_write(void *fd, const void *buf, size_t len) {
(void) fd, (void) buf, (void) len;
return 0;
}
static size_t packed_seek(void *fd, size_t offset) {
struct packed_file *fp = (struct packed_file *) fd;
fp->pos = offset;
if (fp->pos > fp->size) fp->pos = fp->size;
return fp->pos;
}
static bool packed_rename(const char *from, const char *to) {
(void) from, (void) to;
return false;
}
static bool packed_remove(const char *path) {
(void) path;
return false;
}
static bool packed_mkdir(const char *path) {
(void) path;
return false;
}
struct mg_fs mg_fs_packed = {
packed_stat, packed_list, packed_open, packed_close, packed_read,
packed_write, packed_seek, packed_rename, packed_remove, packed_mkdir};
#ifdef MG_ENABLE_LINES
#line 1 "src/fs_posix.c"
#endif
#if MG_ENABLE_FILE
#ifndef MG_STAT_STRUCT
#define MG_STAT_STRUCT stat
#endif
#ifndef MG_STAT_FUNC
#define MG_STAT_FUNC stat
#endif
static int p_stat(const char *path, size_t *size, time_t *mtime) {
#if !defined(S_ISDIR)
MG_ERROR(("stat() API is not supported. %p %p %p", path, size, mtime));
return 0;
#else
#if MG_ARCH == MG_ARCH_WIN32
struct _stati64 st;
wchar_t tmp[PATH_MAX];
MultiByteToWideChar(CP_UTF8, 0, path, -1, tmp, sizeof(tmp) / sizeof(tmp[0]));
if (_wstati64(tmp, &st) != 0) return 0;
#else
struct MG_STAT_STRUCT st;
if (MG_STAT_FUNC(path, &st) != 0) return 0;
#endif
if (size) *size = (size_t) st.st_size;
if (mtime) *mtime = st.st_mtime;
return MG_FS_READ | MG_FS_WRITE | (S_ISDIR(st.st_mode) ? MG_FS_DIR : 0);
#endif
}
#if MG_ARCH == MG_ARCH_WIN32
struct dirent {
char d_name[MAX_PATH];
};
typedef struct win32_dir {
HANDLE handle;
WIN32_FIND_DATAW info;
struct dirent result;
} DIR;
int gettimeofday(struct timeval *tv, void *tz) {
FILETIME ft;
unsigned __int64 tmpres = 0;
if (tv != NULL) {
GetSystemTimeAsFileTime(&ft);
tmpres |= ft.dwHighDateTime;
tmpres <<= 32;
tmpres |= ft.dwLowDateTime;
tmpres /= 10; // convert into microseconds
tmpres -= (int64_t) 11644473600000000;
tv->tv_sec = (long) (tmpres / 1000000UL);
tv->tv_usec = (long) (tmpres % 1000000UL);
}
(void) tz;
return 0;
}
static int to_wchar(const char *path, wchar_t *wbuf, size_t wbuf_len) {
int ret;
char buf[MAX_PATH * 2], buf2[MAX_PATH * 2], *p;
strncpy(buf, path, sizeof(buf));
buf[sizeof(buf) - 1] = '\0';
// Trim trailing slashes. Leave backslash for paths like "X:\"
p = buf + strlen(buf) - 1;
while (p > buf && p[-1] != ':' && (p[0] == '\\' || p[0] == '/')) *p-- = '\0';
memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
ret = MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
// Convert back to Unicode. If doubly-converted string does not match the
// original, something is fishy, reject.
WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
NULL, NULL);
if (strcmp(buf, buf2) != 0) {
wbuf[0] = L'\0';
ret = 0;
}
return ret;
}
DIR *opendir(const char *name) {
DIR *d = NULL;
wchar_t wpath[MAX_PATH];
DWORD attrs;
if (name == NULL) {
SetLastError(ERROR_BAD_ARGUMENTS);
} else if ((d = (DIR *) calloc(1, sizeof(*d))) == NULL) {
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
} else {
to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0]));
attrs = GetFileAttributesW(wpath);
if (attrs != 0Xffffffff && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
(void) wcscat(wpath, L"\\*");
d->handle = FindFirstFileW(wpath, &d->info);
d->result.d_name[0] = '\0';
} else {
free(d);
d = NULL;
}
}
return d;
}
int closedir(DIR *d) {
int result = 0;
if (d != NULL) {
if (d->handle != INVALID_HANDLE_VALUE)
result = FindClose(d->handle) ? 0 : -1;
free(d);
} else {
result = -1;
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
struct dirent *readdir(DIR *d) {
struct dirent *result = NULL;
if (d != NULL) {
memset(&d->result, 0, sizeof(d->result));
if (d->handle != INVALID_HANDLE_VALUE) {
result = &d->result;
WideCharToMultiByte(CP_UTF8, 0, d->info.cFileName, -1, result->d_name,
sizeof(result->d_name), NULL, NULL);
if (!FindNextFileW(d->handle, &d->info)) {
FindClose(d->handle);
d->handle = INVALID_HANDLE_VALUE;
}
} else {
SetLastError(ERROR_FILE_NOT_FOUND);
}
} else {
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
#endif
static void p_list(const char *dir, void (*fn)(const char *, void *),
void *userdata) {
#if MG_ENABLE_DIRLIST
struct dirent *dp;
DIR *dirp;
if ((dirp = (opendir(dir))) == NULL) return;
while ((dp = readdir(dirp)) != NULL) {
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
fn(dp->d_name, userdata);
}
closedir(dirp);
#else
(void) dir, (void) fn, (void) userdata;
#endif
}
static void *p_open(const char *path, int flags) {
const char *mode = flags == MG_FS_READ ? "rb" : "a+b";
#if MG_ARCH == MG_ARCH_WIN32
wchar_t b1[PATH_MAX], b2[10];
MultiByteToWideChar(CP_UTF8, 0, path, -1, b1, sizeof(b1) / sizeof(b1[0]));
MultiByteToWideChar(CP_UTF8, 0, mode, -1, b2, sizeof(b2) / sizeof(b2[0]));
return (void *) _wfopen(b1, b2);
#else
return (void *) fopen(path, mode);
#endif
}
static void p_close(void *fp) {
fclose((FILE *) fp);
}
static size_t p_read(void *fp, void *buf, size_t len) {
return fread(buf, 1, len, (FILE *) fp);
}
static size_t p_write(void *fp, const void *buf, size_t len) {
return fwrite(buf, 1, len, (FILE *) fp);
}
static size_t p_seek(void *fp, size_t offset) {
#if (defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64) || \
(defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || \
(defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600)
if (fseeko((FILE *) fp, (off_t) offset, SEEK_SET) != 0) (void) 0;
#else
if (fseek((FILE *) fp, (long) offset, SEEK_SET) != 0) (void) 0;
#endif
return (size_t) ftell((FILE *) fp);
}
static bool p_rename(const char *from, const char *to) {
return rename(from, to) == 0;
}
static bool p_remove(const char *path) {
return remove(path) == 0;
}
static bool p_mkdir(const char *path) {
return mkdir(path, 0775) == 0;
}
#else
static int p_stat(const char *path, size_t *size, time_t *mtime) {
(void) path, (void) size, (void) mtime;
return 0;
}
static void p_list(const char *path, void (*fn)(const char *, void *),
void *userdata) {
(void) path, (void) fn, (void) userdata;
}
static void *p_open(const char *path, int flags) {
(void) path, (void) flags;
return NULL;
}
static void p_close(void *fp) {
(void) fp;
}
static size_t p_read(void *fd, void *buf, size_t len) {
(void) fd, (void) buf, (void) len;
return 0;
}
static size_t p_write(void *fd, const void *buf, size_t len) {
(void) fd, (void) buf, (void) len;
return 0;
}
static size_t p_seek(void *fd, size_t offset) {
(void) fd, (void) offset;
return (size_t) ~0;
}
static bool p_rename(const char *from, const char *to) {
(void) from, (void) to;
return false;
}
static bool p_remove(const char *path) {
(void) path;
return false;
}
static bool p_mkdir(const char *path) {
(void) path;
return false;
}
#endif
struct mg_fs mg_fs_posix = {p_stat, p_list, p_open, p_close, p_read,
p_write, p_seek, p_rename, p_remove, p_mkdir};
#ifdef MG_ENABLE_LINES
#line 1 "src/http.c"
#endif
// Multipart POST example:
// --xyz
// Content-Disposition: form-data; name="val"
//
// abcdef
// --xyz
// Content-Disposition: form-data; name="foo"; filename="a.txt"
// Content-Type: text/plain
//
// hello world
//
// --xyz--
size_t mg_http_next_multipart(struct mg_str body, size_t ofs,
struct mg_http_part *part) {
struct mg_str cd = mg_str_n("Content-Disposition", 19);
const char *s = body.ptr;
size_t b = ofs, h1, h2, b1, b2, max = body.len;
// Init part params
if (part != NULL) part->name = part->filename = part->body = mg_str_n(0, 0);
// Skip boundary
while (b + 2 < max && s[b] != '\r' && s[b + 1] != '\n') b++;
if (b <= ofs || b + 2 >= max) return 0;
// MG_INFO(("B: %zu %zu [%.*s]", ofs, b - ofs, (int) (b - ofs), s));
// Skip headers
h1 = h2 = b + 2;
for (;;) {
while (h2 + 2 < max && s[h2] != '\r' && s[h2 + 1] != '\n') h2++;
if (h2 == h1) break;
if (h2 + 2 >= max) return 0;
// MG_INFO(("Header: [%.*s]", (int) (h2 - h1), &s[h1]));
if (part != NULL && h1 + cd.len + 2 < h2 && s[h1 + cd.len] == ':' &&
mg_ncasecmp(&s[h1], cd.ptr, cd.len) == 0) {
struct mg_str v = mg_str_n(&s[h1 + cd.len + 2], h2 - (h1 + cd.len + 2));
part->name = mg_http_get_header_var(v, mg_str_n("name", 4));
part->filename = mg_http_get_header_var(v, mg_str_n("filename", 8));
}
h1 = h2 = h2 + 2;
}
b1 = b2 = h2 + 2;
while (b2 + 2 + (b - ofs) + 2 < max && !(s[b2] == '\r' && s[b2 + 1] == '\n' &&
memcmp(&s[b2 + 2], s, b - ofs) == 0))
b2++;
if (b2 + 2 >= max) return 0;
if (part != NULL) part->body = mg_str_n(&s[b1], b2 - b1);
// MG_INFO(("Body: [%.*s]", (int) (b2 - b1), &s[b1]));
return b2 + 2;
}
void mg_http_bauth(struct mg_connection *c, const char *user,
const char *pass) {
struct mg_str u = mg_str(user), p = mg_str(pass);
size_t need = c->send.len + 36 + (u.len + p.len) * 2;
if (c->send.size < need) mg_iobuf_resize(&c->send, need);
if (c->send.size >= need) {
int i, n = 0;
char *buf = (char *) &c->send.buf[c->send.len + 21];
memcpy(&buf[-21], "Authorization: Basic ", 21); // DON'T use mg_send!
for (i = 0; i < (int) u.len; i++) {
n = mg_base64_update(((unsigned char *) u.ptr)[i], buf, n);
}
if (p.len > 0) {
n = mg_base64_update(':', buf, n);
for (i = 0; i < (int) p.len; i++) {
n = mg_base64_update(((unsigned char *) p.ptr)[i], buf, n);
}
}
n = mg_base64_final(buf, n);
c->send.len += 21 + (size_t) n + 2;
memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2);
} else {
MG_ERROR(("%lu %s cannot resize iobuf %d->%d ", c->id, c->label,
(int) c->send.size, (int) need));
}
}
int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst,
size_t 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 < 0) len = -3; // Failed to decode
break;
}
}
}
return len;
}
static bool isx(int c) {
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') ||
(c >= 'A' && c <= 'F');
}
int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len,
int is_form_url_encoded) {
size_t i, j;
for (i = j = 0; i < src_len && j + 1 < dst_len; i++, j++) {
if (src[i] == '%') {
// Use `i + 2 < src_len`, not `i < src_len - 2`, note small src_len
if (i + 2 < src_len && isx(src[i + 1]) && isx(src[i + 2])) {
mg_unhex(src + i + 1, 2, (uint8_t *) &dst[j]);
i += 2;
} else {
return -1;
}
} else if (is_form_url_encoded && src[i] == '+') {
dst[j] = ' ';
} else {
dst[j] = src[i];
}
}
if (j < dst_len) dst[j] = '\0'; // Null-terminate the destination
return i >= src_len && j < dst_len ? (int) j : -1;
}
static bool isok(uint8_t c) {
return c == '\n' || c == '\r' || c >= ' ';
}
int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) {
size_t i;
for (i = 0; i < buf_len; i++) {
if (!isok(buf[i])) return -1;
if ((i > 0 && buf[i] == '\n' && buf[i - 1] == '\n') ||
(i > 3 && buf[i] == '\n' && buf[i - 1] == '\r' && buf[i - 2] == '\n'))
return (int) i + 1;
}
return 0;
}
static const char *skip(const char *s, const char *e, const char *d,
struct mg_str *v) {
v->ptr = s;
while (s < e && *s != '\n' && strchr(d, *s) == NULL) s++;
v->len = (size_t) (s - v->ptr);
while (s < e && strchr(d, *s) != NULL) s++;
return s;
}
struct mg_str *mg_http_get_header(struct mg_http_message *h, const char *name) {
size_t i, n = strlen(name), max = sizeof(h->headers) / sizeof(h->headers[0]);
for (i = 0; i < max && h->headers[i].name.len > 0; i++) {
struct mg_str *k = &h->headers[i].name, *v = &h->headers[i].value;
if (n == k->len && mg_ncasecmp(k->ptr, name, n) == 0) return v;
}
return NULL;
}
static void mg_http_parse_headers(const char *s, const char *end,
struct mg_http_header *h, int max_headers) {
int i;
for (i = 0; i < max_headers; i++) {
struct mg_str k, v, tmp;
const char *he = skip(s, end, "\n", &tmp);
s = skip(s, he, ": \r\n", &k);
s = skip(s, he, "\r\n", &v);
if (k.len == tmp.len) continue;
while (v.len > 0 && v.ptr[v.len - 1] == ' ') v.len--; // Trim spaces
if (k.len == 0) break;
// MG_INFO(("--HH [%.*s] [%.*s] [%.*s]", (int) tmp.len - 1, tmp.ptr,
//(int) k.len, k.ptr, (int) v.len, v.ptr));
h[i].name = k;
h[i].value = v;
}
}
int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
int is_response, req_len = mg_http_get_request_len((unsigned char *) s, len);
const char *end = s + req_len, *qs;
struct mg_str *cl;
memset(hm, 0, sizeof(*hm));
if (req_len <= 0) return req_len;
hm->message.ptr = hm->head.ptr = s;
hm->body.ptr = end;
hm->head.len = (size_t) req_len;
hm->chunk.ptr = end;
hm->message.len = hm->body.len = (size_t) ~0; // Set body length to infinite
// Parse request line
s = skip(s, end, " ", &hm->method);
s = skip(s, end, " ", &hm->uri);
s = skip(s, end, "\r\n", &hm->proto);
// Sanity check. Allow protocol/reason to be empty
if (hm->method.len == 0 || hm->uri.len == 0) return -1;
// If URI contains '?' character, setup query string
if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) {
hm->query.ptr = qs + 1;
hm->query.len = (size_t) (&hm->uri.ptr[hm->uri.len] - (qs + 1));
hm->uri.len = (size_t) (qs - hm->uri.ptr);
}
mg_http_parse_headers(s, end, hm->headers,
sizeof(hm->headers) / sizeof(hm->headers[0]));
if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) {
hm->body.len = (size_t) mg_to64(*cl);
hm->message.len = (size_t) req_len + hm->body.len;
}
// mg_http_parse() is used to parse both HTTP requests and HTTP
// responses. If HTTP response does not have Content-Length set, then
// body is read until socket is closed, i.e. body.len is infinite (~0).
//
// For HTTP requests though, according to
// http://tools.ietf.org/html/rfc7231#section-8.1.3,
// only POST and PUT methods have defined body semantics.
// Therefore, if Content-Length is not specified and methods are
// not one of PUT or POST, set body length to 0.
//
// So, if it is HTTP request, and Content-Length is not set,
// and method is not (PUT or POST) then reset body length to zero.
is_response = mg_ncasecmp(hm->method.ptr, "HTTP/", 5) == 0;
if (hm->body.len == (size_t) ~0 && !is_response &&
mg_vcasecmp(&hm->method, "PUT") != 0 &&
mg_vcasecmp(&hm->method, "POST") != 0) {
hm->body.len = 0;
hm->message.len = (size_t) req_len;
}
// The 204 (No content) responses also have 0 body length
if (hm->body.len == (size_t) ~0 && is_response &&
mg_vcasecmp(&hm->uri, "204") == 0) {
hm->body.len = 0;
hm->message.len = (size_t) req_len;
}
return req_len;
}
static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt,
va_list ap) {
char mem[256], *buf = mem;
size_t len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
mg_printf(c, "%lx\r\n", (unsigned long) len);
mg_send(c, buf, len > 0 ? (size_t) len : 0);
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, "%lx\r\n", (unsigned long) len);
mg_send(c, buf, len);
mg_send(c, "\r\n", 2);
}
// clang-format off
static const char *mg_http_status_code_str(int status_code) {
switch (status_code) {
case 100: return "Continue";
case 201: return "Created";
case 202: return "Accepted";
case 204: return "No Content";
case 206: return "Partial Content";
case 301: return "Moved Permanently";
case 302: return "Found";
case 304: return "Not Modified";
case 400: return "Bad Request";
case 401: return "Unauthorized";
case 403: return "Forbidden";
case 404: return "Not Found";
case 418: return "I'm a teapot";
case 500: return "Internal Server Error";
case 501: return "Not Implemented";
default: return "OK";
}
}
// clang-format on
void mg_http_reply(struct mg_connection *c, int code, const char *headers,
const char *fmt, ...) {
char mem[256], *buf = mem;
va_list ap;
size_t len;
va_start(ap, fmt);
len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
mg_printf(c, "HTTP/1.1 %d %s\r\n%sContent-Length: %d\r\n\r\n", code,
mg_http_status_code_str(code), headers == NULL ? "" : headers, len);
mg_send(c, buf, len > 0 ? len : 0);
if (buf != mem) free(buf);
}
static void http_cb(struct mg_connection *, int, void *, void *);
static void restore_http_cb(struct mg_connection *c) {
mg_fs_close((struct mg_fd *) c->pfn_data);
c->pfn_data = NULL;
c->pfn = http_cb;
}
char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime);
char *mg_http_etag(char *buf, size_t len, size_t size, time_t mtime) {
mg_snprintf(buf, len, "\"%lld.%lld\"", (int64_t) mtime, (int64_t) size);
return buf;
}
static void static_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_WRITE || ev == MG_EV_POLL) {
struct mg_fd *fd = (struct mg_fd *) fn_data;
// Read to send IO buffer directly, avoid extra on-stack buffer
size_t n, max = 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 = fd->fs->rd(fd->fd, c->send.buf + c->send.len,
c->send.size - c->send.len);
c->send.len += n;
if (n == 0) restore_http_cb(c);
} else if (ev == MG_EV_CLOSE) {
restore_http_cb(c);
}
(void) ev_data;
}
static struct mg_str guess_content_type(struct mg_str path, const char *extra) {
struct mg_str k, v, s = mg_str(extra);
size_t i = 0;
// clang-format off
struct mg_str tab[] = {
MG_C_STR("html"), MG_C_STR("text/html; charset=utf-8"),
MG_C_STR("htm"), MG_C_STR("text/html; charset=utf-8"),
MG_C_STR("css"), MG_C_STR("text/css; charset=utf-8"),
MG_C_STR("js"), MG_C_STR("text/javascript; charset=utf-8"),
MG_C_STR("gif"), MG_C_STR("image/gif"),
MG_C_STR("png"), MG_C_STR("image/png"),
MG_C_STR("jpg"), MG_C_STR("image/jpeg"),
MG_C_STR("jpeg"), MG_C_STR("image/jpeg"),
MG_C_STR("woff"), MG_C_STR("font/woff"),
MG_C_STR("ttf"), MG_C_STR("font/ttf"),
MG_C_STR("svg"), MG_C_STR("image/svg+xml"),
MG_C_STR("txt"), MG_C_STR("text/plain; charset=utf-8"),
MG_C_STR("avi"), MG_C_STR("video/x-msvideo"),
MG_C_STR("csv"), MG_C_STR("text/csv"),
MG_C_STR("doc"), MG_C_STR("application/msword"),
MG_C_STR("exe"), MG_C_STR("application/octet-stream"),
MG_C_STR("gz"), MG_C_STR("application/gzip"),
MG_C_STR("ico"), MG_C_STR("image/x-icon"),
MG_C_STR("json"), MG_C_STR("application/json"),
MG_C_STR("mov"), MG_C_STR("video/quicktime"),
MG_C_STR("mp3"), MG_C_STR("audio/mpeg"),
MG_C_STR("mp4"), MG_C_STR("video/mp4"),
MG_C_STR("mpeg"), MG_C_STR("video/mpeg"),
MG_C_STR("pdf"), MG_C_STR("application/pdf"),
MG_C_STR("shtml"), MG_C_STR("text/html; charset=utf-8"),
MG_C_STR("tgz"), MG_C_STR("application/tar-gz"),
MG_C_STR("wav"), MG_C_STR("audio/wav"),
MG_C_STR("webp"), MG_C_STR("image/webp"),
MG_C_STR("zip"), MG_C_STR("application/zip"),
MG_C_STR("3gp"), MG_C_STR("video/3gpp"),
{0, 0},
};
// clang-format on
// Shrink path to its extension only
while (i < path.len && path.ptr[path.len - i - 1] != '.') i++;
path.ptr += path.len - i;
path.len = i;
// Process user-provided mime type overrides, if any
while (mg_commalist(&s, &k, &v)) {
if (mg_strcmp(path, k) == 0) return v;
}
// Process built-in mime types
for (i = 0; tab[i].ptr != NULL; i += 2) {
if (mg_strcmp(path, tab[i]) == 0) return tab[i + 1];
}
return mg_str("text/plain; charset=utf-8");
}
static int getrange(struct mg_str *s, int64_t *a, int64_t *b) {
size_t i, numparsed = 0;
// MG_INFO(("%.*s", (int) s->len, s->ptr));
for (i = 0; i + 6 < s->len; i++) {
if (memcmp(&s->ptr[i], "bytes=", 6) == 0) {
struct mg_str p = mg_str_n(s->ptr + i + 6, s->len - i - 6);
if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++;
*a = mg_to64(p);
// MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed));
while (p.len && p.ptr[0] >= '0' && p.ptr[0] <= '9') p.ptr++, p.len--;
if (p.len && p.ptr[0] == '-') p.ptr++, p.len--;
*b = mg_to64(p);
if (p.len > 0 && p.ptr[0] >= '0' && p.ptr[0] <= '9') numparsed++;
// MG_INFO(("PPP [%.*s] %d", (int) p.len, p.ptr, numparsed));
break;
}
}
return (int) numparsed;
}
void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
const char *path,
const struct mg_http_serve_opts *opts) {
char etag[64];
struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs;
struct mg_fd *fd = mg_fs_open(fs, path, MG_FS_READ);
size_t size = 0;
time_t mtime = 0;
struct mg_str *inm = NULL;
if (fd == NULL || fs->st(path, &size, &mtime) == 0) {
MG_DEBUG(("404 [%s] %p", path, (void *) fd));
mg_http_reply(c, 404, "", "%s", "Not found\n");
mg_fs_close(fd);
// NOTE: mg_http_etag() call should go first!
} else if (mg_http_etag(etag, sizeof(etag), size, mtime) != NULL &&
(inm = mg_http_get_header(hm, "If-None-Match")) != NULL &&
mg_vcasecmp(inm, etag) == 0) {
mg_fs_close(fd);
mg_printf(c, "HTTP/1.1 304 Not Modified\r\nContent-Length: 0\r\n\r\n");
} else {
int n, status = 200;
char range[100] = "";
int64_t r1 = 0, r2 = 0, cl = (int64_t) size;
struct mg_str mime = guess_content_type(mg_str(path), opts->mime_types);
// Handle Range header
struct mg_str *rh = mg_http_get_header(hm, "Range");
if (rh != NULL && (n = getrange(rh, &r1, &r2)) > 0 && r1 >= 0 && r2 >= 0) {
// If range is specified like "400-", set second limit to content len
if (n == 1) r2 = cl - 1;
if (r1 > r2 || r2 >= cl) {
status = 416;
cl = 0;
mg_snprintf(range, sizeof(range), "Content-Range: bytes */%lld\r\n",
(int64_t) size);
} else {
status = 206;
cl = r2 - r1 + 1;
mg_snprintf(range, sizeof(range),
"Content-Range: bytes %lld-%lld/%lld\r\n", r1, r1 + cl - 1,
(int64_t) size);
fs->sk(fd->fd, (size_t) r1);
}
}
mg_printf(c,
"HTTP/1.1 %d %s\r\n"
"Content-Type: %.*s\r\n"
"Etag: %s\r\n"
"Content-Length: %llu\r\n"
"%s%s\r\n",
status, mg_http_status_code_str(status), (int) mime.len, mime.ptr,
etag, cl, range, opts->extra_headers ? opts->extra_headers : "");
if (mg_vcasecmp(&hm->method, "HEAD") == 0) {
c->is_draining = 1;
mg_fs_close(fd);
} else {
c->pfn = static_cb;
c->pfn_data = fd;
}
}
}
struct printdirentrydata {
struct mg_connection *c;
struct mg_http_message *hm;
const struct mg_http_serve_opts *opts;
const char *dir;
};
static void printdirentry(const char *name, void *userdata) {
struct printdirentrydata *d = (struct printdirentrydata *) userdata;
struct mg_fs *fs = d->opts->fs == NULL ? &mg_fs_posix : d->opts->fs;
size_t size = 0;
time_t t = 0;
char path[MG_PATH_MAX], sz[40], mod[40];
int flags, n = 0;
// MG_DEBUG(("[%s] [%s]", d->dir, name));
if (mg_snprintf(path, sizeof(path), "%s%c%s", d->dir, '/', name) >
sizeof(path)) {
MG_ERROR(("%s truncated", name));
} else if ((flags = fs->st(path, &size, &t)) == 0) {
MG_ERROR(("%lu stat(%s): %d", d->c->id, path, errno));
} else {
const char *slash = flags & MG_FS_DIR ? "/" : "";
if (flags & MG_FS_DIR) {
mg_snprintf(sz, sizeof(sz), "%s", "[DIR]");
} else {
mg_snprintf(sz, sizeof(sz), "%lld", (uint64_t) size);
}
mg_snprintf(mod, sizeof(mod), "%ld", (unsigned long) t);
n = (int) mg_url_encode(name, strlen(name), path, sizeof(path));
mg_printf(d->c,
" <tr><td><a href=\"%.*s%s\">%s%s</a></td>"
"<td name=%lu>%s</td><td name=%lld>%s</td></tr>\n",
n, path, slash, name, slash, (unsigned long) t, mod,
flags & MG_FS_DIR ? (int64_t) -1 : (int64_t) size, sz);
}
}
static void listdir(struct mg_connection *c, struct mg_http_message *hm,
const struct mg_http_serve_opts *opts, char *dir) {
const char *sort_js_code =
"<script>function srt(tb, sc, so, d) {"
"var tr = Array.prototype.slice.call(tb.rows, 0),"
"tr = tr.sort(function (a, b) { var c1 = a.cells[sc], c2 = b.cells[sc],"
"n1 = c1.getAttribute('name'), n2 = c2.getAttribute('name'), "
"t1 = a.cells[2].getAttribute('name'), "
"t2 = b.cells[2].getAttribute('name'); "
"return so * (t1 < 0 && t2 >= 0 ? -1 : t2 < 0 && t1 >= 0 ? 1 : "
"n1 ? parseInt(n2) - parseInt(n1) : "
"c1.textContent.trim().localeCompare(c2.textContent.trim())); });";
const char *sort_js_code2 =
"for (var i = 0; i < tr.length; i++) tb.appendChild(tr[i]); "
"if (!d) window.location.hash = ('sc=' + sc + '&so=' + so); "
"};"
"window.onload = function() {"
"var tb = document.getElementById('tb');"
"var m = /sc=([012]).so=(1|-1)/.exec(window.location.hash) || [0, 2, 1];"
"var sc = m[1], so = m[2]; document.onclick = function(ev) { "
"var c = ev.target.rel; if (c) {if (c == sc) so *= -1; srt(tb, c, so); "
"sc = c; ev.preventDefault();}};"
"srt(tb, sc, so, true);"
"}"
"</script>";
struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs;
struct printdirentrydata d = {c, hm, opts, dir};
char tmp[10], buf[MG_PATH_MAX];
size_t off, n;
int len = mg_url_decode(hm->uri.ptr, hm->uri.len, buf, sizeof(buf), 0);
struct mg_str uri = len > 0 ? mg_str_n(buf, (size_t) len) : hm->uri;
mg_printf(c,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/html; charset=utf-8\r\n"
"%s"
"Content-Length: \r\n\r\n",
opts->extra_headers == NULL ? "" : opts->extra_headers);
off = c->send.len; // Start of body
mg_printf(c,
"<!DOCTYPE html><html><head><title>Index of %.*s</title>%s%s"
"<style>th,td {text-align: left; padding-right: 1em; "
"font-family: monospace; }</style></head>"
"<body><h1>Index of %.*s</h1><table cellpadding=\"0\"><thead>"
"<tr><th><a href=\"#\" rel=\"0\">Name</a></th><th>"
"<a href=\"#\" rel=\"1\">Modified</a></th>"
"<th><a href=\"#\" rel=\"2\">Size</a></th></tr>"
"<tr><td colspan=\"3\"><hr></td></tr>"
"</thead>"
"<tbody id=\"tb\">\n",
(int) uri.len, uri.ptr, sort_js_code, sort_js_code2, (int) uri.len,
uri.ptr);
mg_printf(c, "%s",
" <tr><td><a href=\"..\">..</a></td>"
"<td name=-1></td><td name=-1>[DIR]</td></tr>\n");
fs->ls(dir, printdirentry, &d);
mg_printf(c,
"</tbody><tfoot><tr><td colspan=\"3\"><hr></td></tr></tfoot>"
"</table><address>Mongoose v.%s</address></body></html>\n",
MG_VERSION);
n = mg_snprintf(tmp, sizeof(tmp), "%lu", (unsigned long) (c->send.len - off));
if (n > sizeof(tmp)) n = 0;
memcpy(c->send.buf + off - 10, tmp, n); // Set content length
}
static void remove_double_dots(char *s) {
char *p = s;
while (*s != '\0') {
*p++ = *s++;
if (s[-1] == '/' || s[-1] == '\\') {
while (s[0] != '\0') {
if (s[0] == '/' || s[0] == '\\') {
s++;
} else if (s[0] == '.' && s[1] == '.' &&
(s[2] == '/' || s[2] == '\\')) {
s += 2;
} else {
break;
}
}
}
}
*p = '\0';
}
// Resolve requested file into `path` and return its fs->st() result
static int uri_to_path2(struct mg_connection *c, struct mg_http_message *hm,
struct mg_fs *fs, struct mg_str url, struct mg_str dir,
char *path, size_t path_size) {
int flags, tmp;
// Append URI to the root_dir, and sanitize it
size_t n = mg_snprintf(path, path_size, "%.*s", (int) dir.len, dir.ptr);
if (n > path_size) n = path_size;
path[path_size - 1] = '\0';
if (n + 2 < path_size) path[n++] = '/', path[n] = '\0';
mg_url_decode(hm->uri.ptr + url.len, hm->uri.len - url.len, path + n,
path_size - n, 0);
path[path_size - 1] = '\0'; // Double-check
remove_double_dots(path);
n = strlen(path);
MG_VERBOSE(("%lu %.*s -> %s", c->id, (int) hm->uri.len, hm->uri.ptr, path));
while (n > 0 && path[n - 1] == '/') path[--n] = 0; // Trim trailing slashes
flags = mg_vcmp(&hm->uri, "/") == 0 ? MG_FS_DIR : fs->st(path, NULL, NULL);
if (flags == 0) {
mg_http_reply(c, 404, "", "Not found\n"); // Does not exist, doh
} else if ((flags & MG_FS_DIR) && hm->uri.len > 0 &&
hm->uri.ptr[hm->uri.len - 1] != '/') {
mg_printf(c,
"HTTP/1.1 301 Moved\r\n"
"Location: %.*s/\r\n"
"Content-Length: 0\r\n"
"\r\n",
(int) hm->uri.len, hm->uri.ptr);
flags = 0;
} else if (flags & MG_FS_DIR) {
if (((mg_snprintf(path + n, path_size - n, "/" MG_HTTP_INDEX) > 0 &&
(tmp = fs->st(path, NULL, NULL)) != 0) ||
(mg_snprintf(path + n, path_size - n, "/index.shtml") > 0 &&
(tmp = fs->st(path, NULL, NULL)) != 0))) {
flags = tmp;
} else {
path[n] = '\0'; // Remove appended index file name
}
}
return flags;
}
static int uri_to_path(struct mg_connection *c, struct mg_http_message *hm,
const struct mg_http_serve_opts *opts, char *path,
size_t path_size) {
struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs;
struct mg_str k, v, s = mg_str(opts->root_dir), u = {0, 0}, p = {0, 0};
while (mg_commalist(&s, &k, &v)) {
if (v.len == 0) v = k, k = mg_str("/");
if (hm->uri.len < k.len) continue;
if (mg_strcmp(k, mg_str_n(hm->uri.ptr, k.len)) != 0) continue;
u = k, p = v;
}
return uri_to_path2(c, hm, fs, u, p, path, path_size);
}
void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm,
const struct mg_http_serve_opts *opts) {
char path[MG_PATH_MAX] = "";
const char *sp = opts->ssi_pattern;
int flags = uri_to_path(c, hm, opts, path, sizeof(path));
if (flags == 0) return;
if (flags & MG_FS_DIR) {
listdir(c, hm, opts, path);
} else if (sp != NULL && mg_globmatch(sp, strlen(sp), path, strlen(path))) {
mg_http_serve_ssi(c, opts->root_dir, path);
} else {
mg_http_serve_file(c, hm, path, opts);
}
}
static bool mg_is_url_safe(int c) {
return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') ||
(c >= 'A' && c <= 'Z') || c == '.' || c == '_' || c == '-' || c == '~';
}
size_t mg_url_encode(const char *s, size_t sl, char *buf, size_t len) {
size_t i, n = 0;
for (i = 0; i < sl; i++) {
int c = *(unsigned char *) &s[i];
if (n + 4 >= len) return 0;
if (mg_is_url_safe(c)) {
buf[n++] = s[i];
} else {
buf[n++] = '%';
mg_hex(&s[i], 1, &buf[n]);
n += 2;
}
}
return n;
}
void mg_http_creds(struct mg_http_message *hm, char *user, size_t userlen,
char *pass, size_t passlen) {
struct mg_str *v = mg_http_get_header(hm, "Authorization");
user[0] = pass[0] = '\0';
if (v != NULL && v->len > 6 && memcmp(v->ptr, "Basic ", 6) == 0) {
char buf[256];
int n = mg_base64_decode(v->ptr + 6, (int) v->len - 6, buf);
const char *p = (const char *) memchr(buf, ':', n > 0 ? (size_t) n : 0);
if (p != NULL) {
mg_snprintf(user, userlen, "%.*s", (int) (p - buf), buf);
mg_snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1);
}
} else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) {
mg_snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7);
} else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) {
struct mg_str t = mg_http_get_header_var(*v, mg_str_n("access_token", 12));
if (t.len > 0) mg_snprintf(pass, passlen, "%.*s", (int) t.len, t.ptr);
} else {
mg_http_get_var(&hm->query, "access_token", pass, passlen);
}
}
static struct mg_str stripquotes(struct mg_str s) {
return s.len > 1 && s.ptr[0] == '"' && s.ptr[s.len - 1] == '"'
? mg_str_n(s.ptr + 1, s.len - 2)
: s;
}
struct mg_str mg_http_get_header_var(struct mg_str s, struct mg_str v) {
size_t i;
for (i = 0; v.len > 0 && i + v.len + 2 < s.len; i++) {
if (s.ptr[i + v.len] == '=' && memcmp(&s.ptr[i], v.ptr, v.len) == 0) {
const char *p = &s.ptr[i + v.len + 1], *b = p, *x = &s.ptr[s.len];
int q = p < x && *p == '"' ? 1 : 0;
while (p < x &&
(q ? p == b || *p != '"' : *p != ';' && *p != ' ' && *p != ','))
p++;
// MG_INFO(("[%.*s] [%.*s] [%.*s]", (int) s.len, s.ptr, (int) v.len,
// v.ptr, (int) (p - b), b));
return stripquotes(mg_str_n(b, (size_t) (p - b + q)));
}
}
return mg_str_n(NULL, 0);
}
bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) {
return mg_match(hm->uri, mg_str(glob), NULL);
}
static size_t get_chunk_length(const char *buf, size_t len, size_t *ll) {
size_t i = 0, n;
while (i < len && buf[i] != '\r' && i != '\n') i++;
n = mg_unhexn((char *) buf, i);
while (i < len && (buf[i] == '\r' || i == '\n')) i++;
// MG_INFO(("len %zu i %zu n %zu ", len, i, n));
if (ll != NULL) *ll = i + 1;
if (i < len && i + n + 2 < len) return i + n + 3;
return 0;
}
// Walk through all chunks in the chunked body. For each chunk, fire
// an MG_EV_HTTP_CHUNK event.
static void walkchunks(struct mg_connection *c, struct mg_http_message *hm,
size_t reqlen) {
size_t off = 0, bl, ll;
while (off + reqlen < c->recv.len) {
char *buf = (char *) &c->recv.buf[reqlen];
size_t memo = c->recv.len;
size_t cl = get_chunk_length(&buf[off], memo - reqlen - off, &ll);
// MG_INFO(("len %zu off %zu cl %zu ll %zu", len, off, cl, ll));
if (cl == 0) break;
hm->chunk = mg_str_n(&buf[off + ll], cl < ll + 2 ? 0 : cl - ll - 2);
mg_call(c, MG_EV_HTTP_CHUNK, hm);
// Increase offset only if user has not deleted this chunk
if (memo == c->recv.len) off += cl;
if (cl <= 5) {
// Zero chunk - last one. Prepare body - cut off chunk lengths
off = bl = 0;
while (off + reqlen < c->recv.len) {
char *buf2 = (char *) &c->recv.buf[reqlen];
size_t memo2 = c->recv.len;
size_t cl2 = get_chunk_length(&buf2[off], memo2 - reqlen - off, &ll);
size_t n = cl2 < ll + 2 ? 0 : cl2 - ll - 2;
memmove(buf2 + bl, buf2 + off + ll, n);
bl += n;
off += cl2;
if (cl2 <= 5) break;
}
// MG_INFO(("BL->%d del %d off %d", (int) bl, (int) del, (int) off));
c->recv.len -= off - bl;
// Set message length to indicate we've received
// everything, to fire MG_EV_HTTP_MSG
hm->message.len = bl + reqlen;
hm->body.len = bl;
break;
}
}
}
static bool mg_is_chunked(struct mg_http_message *hm) {
struct mg_str needle = mg_str_n("chunked", 7);
struct mg_str *te = mg_http_get_header(hm, "Transfer-Encoding");
return te != NULL && mg_strstr(*te, needle) != NULL;
}
void mg_http_delete_chunk(struct mg_connection *c, struct mg_http_message *hm) {
struct mg_str ch = hm->chunk;
const char *end = (char *) &c->recv.buf[c->recv.len], *ce;
bool chunked = mg_is_chunked(hm);
if (chunked) {
ch.len += 4, ch.ptr -= 2; // \r\n before and after the chunk
while (ch.ptr > hm->body.ptr && *ch.ptr != '\n') ch.ptr--, ch.len++;
}
ce = &ch.ptr[ch.len];
if (ce < end) memmove((void *) ch.ptr, ce, (size_t) (end - ce));
c->recv.len -= ch.len;
if (c->pfn_data != NULL) c->pfn_data = (char *) c->pfn_data - ch.len;
}
int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
struct mg_fs *fs, const char *dir) {
char offset[40] = "", name[200] = "", path[256];
int res = 0;
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");
res = -1;
} else if (hm->body.len > 0) {
struct mg_fd *fd;
long oft = strtol(offset, NULL, 0);
mg_snprintf(path, sizeof(path), "%s%c%s", dir, MG_DIRSEP, name);
remove_double_dots(path);
MG_DEBUG(("%d bytes @ %ld [%s]", (int) hm->body.len, oft, path));
if (oft == 0) fs->rm(path);
if ((fd = mg_fs_open(fs, path, MG_FS_WRITE)) == NULL) {
mg_http_reply(c, 400, "", "open(%s): %d", path, errno);
res = -2;
} else {
res = (int) fs->wr(fd->fd, hm->body.ptr, hm->body.len);
mg_fs_close(fd);
mg_http_reply(c, 200, "", "%d", res);
}
}
return res;
}
int mg_http_status(const struct mg_http_message *hm) {
return atoi(hm->uri.ptr);
}
static void http_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
if (ev == MG_EV_READ || ev == MG_EV_CLOSE) {
struct mg_http_message hm;
while (c->recv.buf != NULL && c->recv.len > 0) {
int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
bool is_chunked = n > 0 && mg_is_chunked(&hm);
if (ev == MG_EV_CLOSE) {
hm.message.len = c->recv.len;
hm.body.len = hm.message.len - (size_t) (hm.body.ptr - hm.message.ptr);
} else if (is_chunked && n > 0) {
walkchunks(c, &hm, (size_t) n);
}
// MG_INFO(("---->%d %d\n%.*s", n, is_chunked, (int) c->recv.len,
// c->recv.buf));
if (n < 0 && ev == MG_EV_READ) {
mg_error(c, "HTTP parse:\n%.*s", (int) c->recv.len, c->recv.buf);
break;
} else if (n > 0 && (size_t) c->recv.len >= hm.message.len) {
mg_call(c, MG_EV_HTTP_MSG, &hm);
mg_iobuf_del(&c->recv, 0, hm.message.len);
} else {
if (n > 0 && !is_chunked) {
hm.chunk =
mg_str_n((char *) &c->recv.buf[n], c->recv.len - (size_t) n);
// Store remaining body length in c->pfn_data
if (c->pfn_data == NULL)
c->pfn_data = (void *) (hm.message.len - (size_t) n);
mg_call(c, MG_EV_HTTP_CHUNK, &hm);
if (c->pfn_data == NULL) {
hm.chunk.len = 0; // Last chunk!
mg_call(c, MG_EV_HTTP_CHUNK, &hm); // Lest user know
memmove(c->recv.buf, c->recv.buf + n, c->recv.len - (size_t) n);
c->recv.len -= (size_t) n;
}
}
break;
}
}
}
(void) fnd;
(void) evd;
}
struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = http_cb;
return c;
}
struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = http_cb;
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/iobuf.c"
#endif
#include <string.h>
// Not using memset for zeroing memory, cause it can be dropped by compiler
// See https://github.com/cesanta/mongoose/pull/1265
static void zeromem(volatile unsigned char *buf, size_t len) {
if (buf != NULL) {
while (len--) *buf++ = 0;
}
}
int mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
int ok = 1;
if (new_size == 0) {
zeromem(io->buf, io->size);
free(io->buf);
io->buf = NULL;
io->len = io->size = 0;
} else if (new_size != io->size) {
// NOTE(lsm): do not use realloc here. Use calloc/free only, to ease the
// porting to some obscure platforms like FreeRTOS
void *p = calloc(1, new_size);
if (p != NULL) {
size_t len = new_size < io->len ? new_size : io->len;
if (len > 0) memmove(p, io->buf, len);
zeromem(io->buf, io->size);
free(io->buf);
io->buf = (unsigned char *) p;
io->size = new_size;
} else {
ok = 0;
MG_ERROR(("%lld->%lld", (uint64_t) io->size, (uint64_t) new_size));
}
}
return ok;
}
int mg_iobuf_init(struct mg_iobuf *io, size_t size) {
io->buf = NULL;
io->size = io->len = 0;
return mg_iobuf_resize(io, size);
}
size_t mg_iobuf_add(struct mg_iobuf *io, size_t ofs, const void *buf,
size_t len, size_t chunk_size) {
size_t new_size = io->len + len;
if (new_size > io->size) {
new_size += chunk_size; // Make sure that io->size
new_size -= new_size % chunk_size; // is aligned by chunk_size boundary
mg_iobuf_resize(io, new_size); // Attempt to realloc
if (new_size != io->size) len = 0; // Realloc failure, append nothing
}
if (ofs < io->len) memmove(io->buf + ofs + len, io->buf + ofs, io->len - ofs);
if (buf != NULL) memmove(io->buf + ofs, buf, len);
if (ofs > io->len) io->len += ofs - io->len;
io->len += len;
return len;
}
size_t mg_iobuf_del(struct mg_iobuf *io, size_t ofs, size_t len) {
if (ofs > io->len) ofs = io->len;
if (ofs + len > io->len) len = io->len - ofs;
if (io->buf) memmove(io->buf + ofs, io->buf + ofs + len, io->len - ofs - len);
if (io->buf) zeromem(io->buf + io->len - len, len);
io->len -= len;
return len;
}
void mg_iobuf_free(struct mg_iobuf *io) {
mg_iobuf_resize(io, 0);
}
#ifdef MG_ENABLE_LINES
#line 1 "src/log.c"
#endif
#if MG_ENABLE_LOG
static void mg_log_stdout(const void *buf, size_t len, void *userdata) {
(void) userdata, (void) buf, (void) len;
#if MG_ENABLE_FILE
fwrite(buf, 1, len, stdout);
#endif
}
static const char *s_spec = "2";
static void (*s_fn)(const void *, size_t, void *) = mg_log_stdout;
static void *s_fn_param = NULL;
void mg_log_set(const char *spec) {
MG_DEBUG(("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 = MG_LL_INFO;
struct mg_str k, v, s = mg_str(s_spec);
const char *p = strrchr(file, '/');
if (s_fn == NULL) return false;
if (p == NULL) p = strrchr(file, '\\');
p = p == NULL ? file : p + 1;
while (mg_commalist(&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 buf[41];
size_t n = mg_snprintf(buf, sizeof(buf), "%llx %d %s:%d:%s", mg_millis(),
level, p, line, fname);
if (n > sizeof(buf) - 2) n = sizeof(buf) - 2;
while (n < sizeof(buf)) buf[n++] = ' ';
buf[sizeof(buf) - 1] = '\0';
s_fn(buf, n - 1, s_fn_param);
return true;
} else {
return false;
}
}
void mg_log(const char *fmt, ...) {
char mem[256], *buf = mem;
va_list ap;
size_t len;
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 *, size_t, void *), void *fnd) {
s_fn = fn;
s_fn_param = fnd;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/md5.c"
#endif
#include <string.h>
#if defined(MG_ENABLE_MD5) && 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
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] = (uint8_t) ((cmd << 4) | flags);
do {
*vlen = len % 0x80;
len /= 0x80;
if (len > 0) *vlen |= 0x80;
vlen++;
} while (len > 0 && vlen < &buf[sizeof(buf)]);
mg_send(c, buf, (size_t) (vlen - buf));
}
static void mg_send_u16(struct mg_connection *c, uint16_t value) {
mg_send(c, &value, sizeof(value));
}
void mg_mqtt_login(struct mg_connection *c, const struct mg_mqtt_opts *opts) {
char rnd[9], client_id[16];
struct mg_str cid = opts->client_id;
uint32_t total_len = 7 + 1 + 2 + 2;
uint8_t connflag = (uint8_t) ((opts->will_qos & 3) << 3);
if (cid.len == 0) {
mg_random(rnd, sizeof(rnd));
mg_base64_encode((unsigned char *) rnd, sizeof(rnd), client_id);
client_id[sizeof(client_id) - 1] = '\0';
cid = mg_str(client_id);
}
if (opts->user.len > 0) {
total_len += 2 + (uint32_t) opts->user.len;
connflag |= MQTT_HAS_USER_NAME;
}
if (opts->pass.len > 0) {
total_len += 2 + (uint32_t) opts->pass.len;
connflag |= 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;
connflag |= MQTT_HAS_WILL;
}
if (opts->clean || cid.len == 0) connflag |= MQTT_CLEAN_SESSION;
if (opts->will_retain) connflag |= MQTT_WILL_RETAIN;
total_len += (uint32_t) cid.len;
mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len);
mg_send(c, "\00\04MQTT\04", 7);
mg_send(c, &connflag, sizeof(connflag));
// 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) cid.len));
mg_send(c, cid.ptr, cid.len);
if (connflag & 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 (opts->user.len > 0) {
mg_send_u16(c, mg_htons((uint16_t) opts->user.len));
mg_send(c, opts->user.ptr, opts->user.len);
}
if (opts->pass.len > 0) {
mg_send_u16(c, mg_htons((uint16_t) opts->pass.len));
mg_send(c, opts->pass.ptr, opts->pass.len);
}
}
void mg_mqtt_pub(struct mg_connection *c, struct mg_str topic,
struct mg_str data, int qos, bool retain) {
uint8_t flags = (uint8_t) (((qos & 3) << 1) | (retain ? 1 : 0));
uint32_t total_len = 2 + (uint32_t) topic.len + (uint32_t) data.len;
MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) topic.len, (char *) topic.ptr,
(int) data.len, (char *) data.ptr));
if (qos > 0) 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 (qos > 0) {
if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
mg_send_u16(c, mg_htons(c->mgr->mqtt_id));
}
mg_send(c, data.ptr, data.len);
}
void mg_mqtt_sub(struct mg_connection *c, struct mg_str topic, int qos) {
uint8_t qos_ = qos & 3;
uint32_t total_len = 2 + (uint32_t) topic.len + 2 + 1;
mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, 2, total_len);
if (++c->mgr->mqtt_id == 0) ++c->mgr->mqtt_id;
mg_send_u16(c, mg_htons(c->mgr->mqtt_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 = (uint8_t) (buf[0] >> 4);
m->qos = (buf[0] >> 1) & 3;
n = len_len = 0;
p = (uint8_t *) buf + 1;
while ((size_t) (p - buf) < len) {
lc = *((uint8_t *) p++);
n += (uint32_t) ((lc & 0x7f) << 7 * len_len);
len_len++;
if (!(lc & 0x80)) break;
if (len_len >= 4) return MQTT_MALFORMED;
}
end = p + n;
if ((lc & 0x80) || (end > buf + len)) return MQTT_INCOMPLETE;
m->dgram.len = (size_t) (end - buf);
switch (m->cmd) {
case MQTT_CMD_CONNACK:
if (end - p < 2) return MQTT_MALFORMED;
m->ack = p[1];
break;
case MQTT_CMD_PUBACK:
case MQTT_CMD_PUBREC:
case MQTT_CMD_PUBREL:
case MQTT_CMD_PUBCOMP:
case MQTT_CMD_SUBACK:
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]);
break;
case MQTT_CMD_SUBSCRIBE: {
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]);
p += 2;
break;
}
case MQTT_CMD_PUBLISH: {
if (p + 2 > end) return MQTT_MALFORMED;
m->topic.len = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]);
m->topic.ptr = (char *) p + 2;
p += 2 + m->topic.len;
if (p > end) return MQTT_MALFORMED;
if (m->qos > 0) {
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (uint16_t) ((((uint16_t) p[0]) << 8) | p[1]);
p += 2;
}
if (p > end) return MQTT_MALFORMED;
m->data.ptr = (char *) p;
m->data.len = (size_t) (end - p);
break;
}
default:
break;
}
return MQTT_OK;
}
static size_t mg_mqtt_next_topic(struct mg_mqtt_message *msg,
struct mg_str *topic, uint8_t *qos,
size_t pos) {
unsigned char *buf = (unsigned char *) msg->dgram.ptr + pos;
size_t new_pos;
if (pos >= msg->dgram.len) return 0;
topic->len = (size_t) (((unsigned) buf[0]) << 8 | buf[1]);
topic->ptr = (char *) buf + 2;
new_pos = pos + 2 + topic->len + (qos == NULL ? 0 : 1);
if ((size_t) new_pos > msg->dgram.len) return 0;
if (qos != NULL) *qos = buf[2 + topic->len];
return new_pos;
}
size_t mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, size_t pos) {
uint8_t tmp;
return mg_mqtt_next_topic(msg, topic, qos == NULL ? &tmp : qos, pos);
}
size_t mg_mqtt_next_unsub(struct mg_mqtt_message *msg, struct mg_str *topic,
size_t pos) {
return mg_mqtt_next_topic(msg, topic, NULL, 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) {
MG_ERROR(("%lu MQTT malformed message", c->id));
c->is_closing = 1;
break;
} else if (rc == MQTT_OK) {
MG_VERBOSE(("%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) {
MG_DEBUG(("%lu Connected", c->id));
} else {
MG_ERROR(("%lu MQTT auth failed, code %d", c->id, mm.ack));
c->is_closing = 1;
}
break;
case MQTT_CMD_PUBLISH: {
MG_DEBUG(("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len,
mm.topic.ptr, (int) mm.data.len, mm.data.ptr));
mg_call(c, MG_EV_MQTT_MSG, &mm);
break;
}
}
mg_call(c, MG_EV_MQTT_CMD, &mm);
mg_iobuf_del(&c->recv, 0, mm.dgram.len);
} else {
break;
}
}
}
(void) ev_data;
(void) fn_data;
}
void mg_mqtt_ping(struct mg_connection *nc) {
mg_mqtt_send_header(nc, MQTT_CMD_PINGREQ, 0, 0);
}
void mg_mqtt_pong(struct mg_connection *nc) {
mg_mqtt_send_header(nc, MQTT_CMD_PINGRESP, 0, 0);
}
void mg_mqtt_disconnect(struct mg_connection *nc) {
mg_mqtt_send_header(nc, MQTT_CMD_DISCONNECT, 0, 0);
}
struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url,
const struct mg_mqtt_opts *opts,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
if (c != NULL) {
struct mg_mqtt_opts empty;
memset(&empty, 0, sizeof(empty));
mg_mqtt_login(c, opts == NULL ? &empty : opts);
c->pfn = mqtt_cb;
}
return c;
}
struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr;
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/net.c"
#endif
size_t mg_vprintf(struct mg_connection *c, const char *fmt, va_list ap) {
char mem[256], *buf = mem;
size_t len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
len = mg_send(c, buf, len);
if (buf != mem) free(buf);
return len;
}
size_t mg_printf(struct mg_connection *c, const char *fmt, ...) {
size_t len = 0;
va_list ap;
va_start(ap, fmt);
len = mg_vprintf(c, fmt, ap);
va_end(ap);
return len;
}
char *mg_straddr(struct mg_addr *a, char *buf, size_t len) {
char tmp[30];
const char *fmt = a->is_ip6 ? "[%s]:%d" : "%s:%d";
mg_ntoa(a, tmp, sizeof(tmp));
mg_snprintf(buf, len, fmt, tmp, (int) mg_ntohs(a->port));
return buf;
}
char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) {
if (addr->is_ip6) {
uint16_t *p = (uint16_t *) addr->ip6;
mg_snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x", mg_htons(p[0]),
mg_htons(p[1]), mg_htons(p[2]), mg_htons(p[3]), mg_htons(p[4]),
mg_htons(p[5]), mg_htons(p[6]), mg_htons(p[7]));
} else {
uint8_t p[4];
memcpy(p, &addr->ip, sizeof(p));
mg_snprintf(buf, len, "%d.%d.%d.%d", (int) p[0], (int) p[1], (int) p[2],
(int) p[3]);
}
return buf;
}
static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
if (mg_vcasecmp(&str, "localhost") != 0) return false;
addr->ip = mg_htonl(0x7f000001);
addr->is_ip6 = false;
return true;
}
static bool mg_atone(struct mg_str str, struct mg_addr *addr) {
if (str.len > 0) return false;
addr->ip = 0;
addr->is_ip6 = false;
return true;
}
static bool mg_aton4(struct mg_str str, struct mg_addr *addr) {
uint8_t data[4] = {0, 0, 0, 0};
size_t i, num_dots = 0;
for (i = 0; i < str.len; i++) {
if (str.ptr[i] >= '0' && str.ptr[i] <= '9') {
int octet = data[num_dots] * 10 + (str.ptr[i] - '0');
if (octet > 255) return false;
data[num_dots] = (uint8_t) octet;
} else if (str.ptr[i] == '.') {
if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false;
num_dots++;
} else {
return false;
}
}
if (num_dots != 3 || str.ptr[i - 1] == '.') return false;
memcpy(&addr->ip, data, sizeof(data));
addr->is_ip6 = false;
return true;
}
static bool mg_v4mapped(struct mg_str str, struct mg_addr *addr) {
int i;
if (str.len < 14) return false;
if (str.ptr[0] != ':' || str.ptr[1] != ':' || str.ptr[6] != ':') return false;
for (i = 2; i < 6; i++) {
if (str.ptr[i] != 'f' && str.ptr[i] != 'F') return false;
}
if (!mg_aton4(mg_str_n(&str.ptr[7], str.len - 7), addr)) return false;
memset(addr->ip6, 0, sizeof(addr->ip6));
addr->ip6[10] = addr->ip6[11] = 255;
memcpy(&addr->ip6[12], &addr->ip, 4);
addr->is_ip6 = true;
return true;
}
static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
size_t i, j = 0, n = 0, dc = 42;
if (str.len > 2 && str.ptr[0] == '[') str.ptr++, str.len -= 2;
if (mg_v4mapped(str, addr)) return true;
for (i = 0; i < str.len; i++) {
if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') ||
(str.ptr[i] >= 'a' && str.ptr[i] <= 'f') ||
(str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) {
unsigned long val;
if (i > j + 3) return false;
// MG_DEBUG(("%zu %zu [%.*s]", i, j, (int) (i - j + 1), &str.ptr[j]));
val = mg_unhexn(&str.ptr[j], i - j + 1);
addr->ip6[n] = (uint8_t) ((val >> 8) & 255);
addr->ip6[n + 1] = (uint8_t) (val & 255);
} else if (str.ptr[i] == ':') {
j = i + 1;
if (i > 0 && str.ptr[i - 1] == ':') {
dc = n; // Double colon
if (i > 1 && str.ptr[i - 2] == ':') return false;
} else if (i > 0) {
n += 2;
}
if (n > 14) return false;
addr->ip6[n] = addr->ip6[n + 1] = 0; // For trailing ::
} else {
return false;
}
}
if (n < 14 && dc == 42) return false;
if (n < 14) {
memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2);
memset(&addr->ip6[dc], 0, 14 - n);
}
addr->is_ip6 = true;
return true;
}
bool mg_aton(struct mg_str str, struct mg_addr *addr) {
// MG_INFO(("[%.*s]", (int) str.len, str.ptr));
return mg_atone(str, addr) || mg_atonl(str, addr) || mg_aton4(str, addr) ||
mg_aton6(str, addr);
}
struct mg_connection *mg_alloc_conn(struct mg_mgr *mgr) {
struct mg_connection *c = (struct mg_connection *) calloc(1, sizeof(*c));
if (c != NULL) {
c->mgr = mgr;
c->id = ++mgr->nextid;
}
return c;
}
void mg_close_conn(struct mg_connection *c) {
mg_resolve_cancel(c); // Close any pending DNS query
LIST_DELETE(struct mg_connection, &c->mgr->conns, c);
if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL;
if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL;
// Order of operations is important. `MG_EV_CLOSE` event must be fired
// before we deallocate received data, see #1331
mg_call(c, MG_EV_CLOSE, NULL);
MG_DEBUG(("%lu closed", c->id));
mg_tls_free(c);
mg_iobuf_free(&c->recv);
mg_iobuf_free(&c->send);
memset(c, 0, sizeof(*c));
free(c);
}
struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = NULL;
if (url == NULL || url[0] == '\0') {
MG_ERROR(("null url"));
} else if ((c = mg_alloc_conn(mgr)) == NULL) {
MG_ERROR(("OOM"));
} else {
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->is_udp = (strncmp(url, "udp:", 4) == 0);
c->fn = fn;
c->is_client = true;
c->fd = (void *) (size_t) -1; // Set to invalid socket
c->fn_data = fn_data;
MG_DEBUG(("%lu -1 %s", c->id, url));
mg_call(c, MG_EV_OPEN, NULL);
mg_resolve(c, url);
}
return c;
}
struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = NULL;
if ((c = mg_alloc_conn(mgr)) == NULL) {
MG_ERROR(("OOM %s", url));
} else if (!mg_open_listener(c, url)) {
MG_ERROR(("Failed: %s, errno %d", url, errno));
free(c);
} else {
c->is_listening = 1;
c->is_udp = strncmp(url, "udp:", 4) == 0;
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->fn = fn;
c->fn_data = fn_data;
mg_call(c, MG_EV_OPEN, NULL);
MG_DEBUG(("%lu %p %s", c->id, c->fd, url));
}
return c;
}
struct mg_timer *mg_timer_add(struct mg_mgr *mgr, uint64_t milliseconds,
unsigned flags, void (*fn)(void *), void *arg) {
struct mg_timer *t = (struct mg_timer *) calloc(1, sizeof(*t));
mg_timer_init(&mgr->timers, t, milliseconds, flags, fn, arg);
return t;
}
void mg_mgr_free(struct mg_mgr *mgr) {
struct mg_connection *c;
struct mg_timer *tmp, *t = mgr->timers;
while (t != NULL) tmp = t->next, free(t), t = tmp;
for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1;
mg_mgr_poll(mgr, 0);
#if MG_ARCH == MG_ARCH_FREERTOS_TCP
FreeRTOS_DeleteSocketSet(mgr->ss);
#endif
MG_DEBUG(("All connections closed"));
}
void mg_mgr_init(struct mg_mgr *mgr) {
memset(mgr, 0, sizeof(*mgr));
#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
// clang-format off
{ WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); }
// clang-format on
#elif MG_ARCH == MG_ARCH_FREERTOS_TCP
mgr->ss = FreeRTOS_CreateSocketSet();
#elif defined(__unix) || defined(__unix__) || defined(__APPLE__)
// Ignore SIGPIPE signal, so if client cancels the request, it
// won't kill the whole process.
signal(SIGPIPE, SIG_IGN);
#endif
mgr->dnstimeout = 3000;
mgr->dns4.url = "udp://8.8.8.8:53";
mgr->dns6.url = "udp://[2001:4860:4860::8888]:53";
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sha1.c"
#endif
/* Copyright(c) By Steve Reid <steve@edmweb.com> */
/* 100% Public Domain */
#include <string.h>
/*
* 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);
static void mg_sha1_transform(uint32_t state[5],
const unsigned char buffer[64]) {
uint32_t a, b, c, d, e;
union char64long16 block[1];
memcpy(block, buffer, 64);
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
R0(a, b, c, d, e, 0);
R0(e, a, b, c, d, 1);
R0(d, e, a, b, c, 2);
R0(c, d, e, a, b, 3);
R0(b, c, d, e, a, 4);
R0(a, b, c, d, e, 5);
R0(e, a, b, c, d, 6);
R0(d, e, a, b, c, 7);
R0(c, d, e, a, b, 8);
R0(b, c, d, e, a, 9);
R0(a, b, c, d, e, 10);
R0(e, a, b, c, d, 11);
R0(d, e, a, b, c, 12);
R0(c, d, e, a, b, 13);
R0(b, c, d, e, a, 14);
R0(a, b, c, d, e, 15);
R1(e, a, b, c, d, 16);
R1(d, e, a, b, c, 17);
R1(c, d, e, a, b, 18);
R1(b, c, d, e, a, 19);
R2(a, b, c, d, e, 20);
R2(e, a, b, c, d, 21);
R2(d, e, a, b, c, 22);
R2(c, d, e, a, b, 23);
R2(b, c, d, e, a, 24);
R2(a, b, c, d, e, 25);
R2(e, a, b, c, d, 26);
R2(d, e, a, b, c, 27);
R2(c, d, e, a, b, 28);
R2(b, c, d, e, a, 29);
R2(a, b, c, d, e, 30);
R2(e, a, b, c, d, 31);
R2(d, e, a, b, c, 32);
R2(c, d, e, a, b, 33);
R2(b, c, d, e, a, 34);
R2(a, b, c, d, e, 35);
R2(e, a, b, c, d, 36);
R2(d, e, a, b, c, 37);
R2(c, d, e, a, b, 38);
R2(b, c, d, e, a, 39);
R3(a, b, c, d, e, 40);
R3(e, a, b, c, d, 41);
R3(d, e, a, b, c, 42);
R3(c, d, e, a, b, 43);
R3(b, c, d, e, a, 44);
R3(a, b, c, d, e, 45);
R3(e, a, b, c, d, 46);
R3(d, e, a, b, c, 47);
R3(c, d, e, a, b, 48);
R3(b, c, d, e, a, 49);
R3(a, b, c, d, e, 50);
R3(e, a, b, c, d, 51);
R3(d, e, a, b, c, 52);
R3(c, d, e, a, b, 53);
R3(b, c, d, e, a, 54);
R3(a, b, c, d, e, 55);
R3(e, a, b, c, d, 56);
R3(d, e, a, b, c, 57);
R3(c, d, e, a, b, 58);
R3(b, c, d, e, a, 59);
R4(a, b, c, d, e, 60);
R4(e, a, b, c, d, 61);
R4(d, e, a, b, c, 62);
R4(c, d, e, a, b, 63);
R4(b, c, d, e, a, 64);
R4(a, b, c, d, e, 65);
R4(e, a, b, c, d, 66);
R4(d, e, a, b, c, 67);
R4(c, d, e, a, b, 68);
R4(b, c, d, e, a, 69);
R4(a, b, c, d, e, 70);
R4(e, a, b, c, d, 71);
R4(d, e, a, b, c, 72);
R4(c, d, e, a, b, 73);
R4(b, c, d, e, a, 74);
R4(a, b, c, d, e, 75);
R4(e, a, b, c, d, 76);
R4(d, e, a, b, c, 77);
R4(c, d, e, a, b, 78);
R4(b, c, d, e, a, 79);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Erase working structures. The order of operations is important,
* used to ensure that compiler doesn't optimize those out. */
memset(block, 0, sizeof(block));
a = b = c = d = e = 0;
(void) a;
(void) b;
(void) c;
(void) d;
(void) e;
}
void mg_sha1_init(mg_sha1_ctx *context) {
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
void mg_sha1_update(mg_sha1_ctx *context, const unsigned char *data,
size_t len) {
size_t i, j;
j = context->count[0];
if ((context->count[0] += (uint32_t) len << 3) < j) context->count[1]++;
context->count[1] += (uint32_t) (len >> 29);
j = (j >> 3) & 63;
if ((j + len) > 63) {
memcpy(&context->buffer[j], data, (i = 64 - j));
mg_sha1_transform(context->state, context->buffer);
for (; i + 63 < len; i += 64) {
mg_sha1_transform(context->state, &data[i]);
}
j = 0;
} else
i = 0;
memcpy(&context->buffer[j], &data[i], len - i);
}
void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *context) {
unsigned i;
unsigned char finalcount[8], c;
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >>
((3 - (i & 3)) * 8)) &
255);
}
c = 0200;
mg_sha1_update(context, &c, 1);
while ((context->count[0] & 504) != 448) {
c = 0000;
mg_sha1_update(context, &c, 1);
}
mg_sha1_update(context, finalcount, 8);
for (i = 0; i < 20; i++) {
digest[i] =
(unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
}
memset(context, '\0', sizeof(*context));
memset(&finalcount, '\0', sizeof(finalcount));
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sntp.c"
#endif
#define SNTP_INTERVAL_SEC 3600
#define SNTP_TIME_OFFSET 2208988800UL
int64_t mg_sntp_parse(const unsigned char *buf, size_t len) {
int64_t res = -1;
int mode = len > 0 ? buf[0] & 7 : 0;
if (len < 48) {
MG_ERROR(("%s", "corrupt packet"));
} else if ((buf[0] & 0x38) >> 3 != 4) {
MG_ERROR(("%s", "wrong version"));
} else if (mode != 4 && mode != 5) {
MG_ERROR(("%s", "not a server reply"));
} else if (buf[1] == 0) {
MG_ERROR(("%s", "server sent a kiss of death"));
} else {
uint32_t *data = (uint32_t *) &buf[40];
unsigned long seconds = mg_ntohl(data[0]) - SNTP_TIME_OFFSET;
unsigned long useconds = mg_ntohl(data[1]);
// MG_DEBUG(("%lu %lu %lu", time(0), seconds, useconds));
res = ((int64_t) seconds) * 1000 + (int64_t) ((useconds / 1000) % 1000);
}
return res;
}
static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
if (ev == MG_EV_READ) {
int64_t milliseconds = mg_sntp_parse(c->recv.buf, c->recv.len);
if (milliseconds > 0) {
mg_call(c, MG_EV_SNTP_TIME, (uint64_t *) &milliseconds);
MG_DEBUG(("%u.%u", (unsigned) (milliseconds / 1000),
(unsigned) (milliseconds % 1000)));
}
c->recv.len = 0; // Clear receive buffer
} else if (ev == MG_EV_CONNECT) {
mg_sntp_send(c, (unsigned long) 0);
} else if (ev == MG_EV_CLOSE) {
}
(void) fnd;
(void) evd;
}
void mg_sntp_send(struct mg_connection *c, unsigned long utc) {
if (c->is_resolving) {
MG_ERROR(("%lu wait until resolved", c->id));
} else {
uint8_t buf[48] = {0};
buf[0] = (0 << 6) | (4 << 3) | 3;
mg_send(c, buf, sizeof(buf));
MG_DEBUG(("%lu ct %lu", c->id, utc));
}
}
struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fnd) {
struct mg_connection *c = NULL;
if (url == NULL) url = "udp://time.google.com:123";
if ((c = mg_connect(mgr, url, fn, fnd)) != NULL) c->pfn = sntp_cb;
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sock.c"
#endif
#if MG_ENABLE_SOCKET
#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
#define MG_SOCK_ERRNO WSAGetLastError()
#ifndef SO_EXCLUSIVEADDRUSE
#define SO_EXCLUSIVEADDRUSE ((int) (~SO_REUSEADDR))
#pragma comment(lib, "ws2_32.lib")
#endif
#elif MG_ARCH == MG_ARCH_FREERTOS_TCP
#define MG_SOCK_ERRNO errno
typedef Socket_t SOCKET;
#define INVALID_SOCKET FREERTOS_INVALID_SOCKET
#else
#define MG_SOCK_ERRNO errno
#ifndef closesocket
#define closesocket(x) close(x)
#endif
#define INVALID_SOCKET (-1)
typedef int SOCKET;
#endif
#define FD(c_) ((SOCKET) (size_t) (c_)->fd)
#define S2PTR(s_) ((void *) (size_t) (s_))
#ifndef MSG_NONBLOCKING
#define MSG_NONBLOCKING 0
#endif
#ifndef AF_INET6
#define AF_INET6 10
#endif
union usa {
struct sockaddr sa;
struct sockaddr_in sin;
#if MG_ENABLE_IPV6
struct sockaddr_in6 sin6;
#endif
};
static socklen_t tousa(struct mg_addr *a, union usa *usa) {
socklen_t len = sizeof(usa->sin);
memset(usa, 0, sizeof(*usa));
usa->sin.sin_family = AF_INET;
usa->sin.sin_port = a->port;
*(uint32_t *) &usa->sin.sin_addr = a->ip;
#if MG_ENABLE_IPV6
if (a->is_ip6) {
usa->sin.sin_family = AF_INET6;
usa->sin6.sin6_port = a->port;
memcpy(&usa->sin6.sin6_addr, a->ip6, sizeof(a->ip6));
len = sizeof(usa->sin6);
}
#endif
return len;
}
static void tomgaddr(union usa *usa, struct mg_addr *a, bool is_ip6) {
a->is_ip6 = is_ip6;
a->port = usa->sin.sin_port;
memcpy(&a->ip, &usa->sin.sin_addr, sizeof(a->ip));
#if MG_ENABLE_IPV6
if (is_ip6) {
memcpy(a->ip6, &usa->sin6.sin6_addr, sizeof(a->ip6));
a->port = usa->sin6.sin6_port;
}
#endif
}
bool mg_sock_would_block(void);
bool mg_sock_would_block(void) {
int err = MG_SOCK_ERRNO;
return err == EINPROGRESS || err == EWOULDBLOCK
#ifndef WINCE
|| err == EAGAIN || err == EINTR
#endif
#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
|| err == WSAEINTR || err == WSAEWOULDBLOCK
#endif
;
}
bool mg_sock_conn_reset(void);
bool mg_sock_conn_reset(void) {
int err = MG_SOCK_ERRNO;
#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
return err == WSAECONNRESET;
#else
return err == EPIPE || err == ECONNRESET;
#endif
}
static void iolog(struct mg_connection *c, char *buf, long n, bool r) {
if (n == 0) {
// Do nothing
} else if (n < 0) {
c->is_closing = 1; // Termination. Don't call mg_error(): #1529
} else if (n > 0) {
if (c->is_hexdumping) {
union usa usa;
char t1[50] = "", t2[50] = "";
socklen_t slen = sizeof(usa.sin);
char *s = mg_hexdump(buf, (size_t) n);
struct mg_addr a;
memset(&usa, 0, sizeof(usa));
memset(&a, 0, sizeof(a));
if (getsockname(FD(c), &usa.sa, &slen) < 0) (void) 0; // Ignore result
tomgaddr(&usa, &a, c->rem.is_ip6);
MG_INFO(("\n-- %lu %s %s %s %s %ld\n%s", c->id,
mg_straddr(&a, t1, sizeof(t1)), r ? "<-" : "->",
mg_straddr(&c->rem, t2, sizeof(t2)), c->label, n, s));
free(s);
(void) t1, (void) t2; // Silence warnings for MG_ENABLE_LOG=0
}
if (r) {
struct mg_str evd = mg_str_n(buf, (size_t) n);
c->recv.len += (size_t) n;
mg_call(c, MG_EV_READ, &evd);
} else {
mg_iobuf_del(&c->send, 0, (size_t) n);
// if (c->send.len == 0) mg_iobuf_resize(&c->send, 0);
mg_call(c, MG_EV_WRITE, &n);
}
}
}
static long mg_sock_send(struct mg_connection *c, const void *buf, size_t len) {
long n;
if (c->is_udp) {
union usa usa;
socklen_t slen = tousa(&c->rem, &usa);
n = sendto(FD(c), (char *) buf, len, 0, &usa.sa, slen);
} else {
n = send(FD(c), (char *) buf, len, MSG_NONBLOCKING);
}
return n == 0 ? -1 : n < 0 && mg_sock_would_block() ? 0 : n;
}
bool mg_send(struct mg_connection *c, const void *buf, size_t len) {
if (c->is_udp) {
long n = mg_sock_send(c, buf, len);
MG_DEBUG(("%lu %p %d:%d %ld err %d (%s)", c->id, c->fd, (int) c->send.len,
(int) c->recv.len, n, MG_SOCK_ERRNO, strerror(errno)));
iolog(c, (char *) buf, n, false);
return n > 0;
} else {
return mg_iobuf_add(&c->send, c->send.len, buf, len, MG_IO_SIZE);
}
}
static void mg_set_non_blocking_mode(SOCKET fd) {
#if MG_ARCH == MG_ARCH_WIN32 && MG_ENABLE_WINSOCK
unsigned long on = 1;
ioctlsocket(fd, FIONBIO, &on);
#elif MG_ARCH == MG_ARCH_FREERTOS_TCP
const BaseType_t off = 0;
if (setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off)) != 0) (void) 0;
if (setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off)) != 0) (void) 0;
#elif MG_ARCH == MG_ARCH_FREERTOS_LWIP || MG_ARCH == MG_ARCH_RTX_LWIP
lwip_fcntl(fd, F_SETFL, O_NONBLOCK);
#elif MG_ARCH == MG_ARCH_AZURERTOS
fcntl(fd, F_SETFL, O_NONBLOCK);
#else
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK); // Non-blocking mode
fcntl(fd, F_SETFD, FD_CLOEXEC); // Set close-on-exec
#endif
}
bool mg_open_listener(struct mg_connection *c, const char *url) {
SOCKET fd = INVALID_SOCKET;
int s_err = 0; // Memoized socket error, in case closesocket() overrides it
c->loc.port = mg_htons(mg_url_port(url));
if (!mg_aton(mg_url_host(url), &c->loc)) {
MG_ERROR(("invalid listening URL: %s", url));
} else {
union usa usa;
socklen_t slen = tousa(&c->loc, &usa);
int on = 1, af = c->loc.is_ip6 ? AF_INET6 : AF_INET;
int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM;
int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
(void) on;
if ((fd = socket(af, type, proto)) != INVALID_SOCKET &&
#if (MG_ARCH != MG_ARCH_WIN32 || !defined(SO_EXCLUSIVEADDRUSE)) && \
(!defined(LWIP_SOCKET) || (defined(LWIP_SOCKET) && SO_REUSE == 1))
// 1. SO_RESUSEADDR is not enabled on Windows because the semantics of
// SO_REUSEADDR on UNIX and Windows is different. On Windows,
// SO_REUSEADDR allows to bind a socket to a port without error even
// if the port is already open by another program. This is not the
// behavior SO_REUSEADDR was designed for, and leads to hard-to-track
// failure scenarios. Therefore, SO_REUSEADDR was disabled on Windows
// unless SO_EXCLUSIVEADDRUSE is supported and set on a socket.
// 2. In case of LWIP, SO_REUSEADDR should be explicitly enabled, by
// defining
// SO_REUSE (in lwipopts.h), otherwise the code below will compile
// but won't work! (setsockopt will return EINVAL)
!setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char *) &on, sizeof(on)) &&
#endif
#if MG_ARCH == MG_ARCH_WIN32 && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE)
// "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE"
//! setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char *) &on, sizeof(on))
//! &&
!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, MG_SOCK_LISTEN_BACKLOG_SIZE) == 0)) {
// In case port was set to 0, get the real port number
if (getsockname(fd, &usa.sa, &slen) == 0) {
c->loc.port = usa.sin.sin_port;
#if MG_ENABLE_IPV6
if (c->loc.is_ip6) c->loc.port = usa.sin6.sin6_port;
#endif
}
mg_set_non_blocking_mode(fd);
} else if (fd != INVALID_SOCKET) {
s_err = MG_SOCK_ERRNO;
closesocket(fd);
fd = INVALID_SOCKET;
}
}
c->fd = S2PTR(fd);
if (fd == INVALID_SOCKET) {
if (s_err == 0) s_err = MG_SOCK_ERRNO;
MG_ERROR(("failed %s, errno %d (%s)", url, s_err, strerror(s_err)));
}
return fd != INVALID_SOCKET;
}
static long mg_sock_recv(struct mg_connection *c, void *buf, size_t len) {
long n = 0;
if (c->is_udp) {
union usa usa;
socklen_t slen = tousa(&c->rem, &usa);
n = recvfrom(FD(c), (char *) buf, len, 0, &usa.sa, &slen);
if (n > 0) tomgaddr(&usa, &c->rem, slen != sizeof(usa.sin));
} else {
n = recv(FD(c), (char *) buf, len, MSG_NONBLOCKING);
}
return n == 0 ? -1 : n < 0 && mg_sock_would_block() ? 0 : n;
}
// NOTE(lsm): do only one iteration of reads, cause some systems
// (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data
static long read_conn(struct mg_connection *c) {
long n = -1;
if (c->recv.len >= MG_MAX_RECV_BUF_SIZE) {
mg_error(c, "max_recv_buf_size reached");
} else if (c->recv.size - c->recv.len < MG_IO_SIZE &&
!mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE)) {
mg_error(c, "oom");
} else {
char *buf = (char *) &c->recv.buf[c->recv.len];
size_t len = c->recv.size - c->recv.len;
n = c->is_tls ? mg_tls_recv(c, buf, len) : mg_sock_recv(c, buf, len);
MG_DEBUG(("%lu %p %d:%d %ld err %d (%s)", c->id, c->fd, (int) c->send.len,
(int) c->recv.len, n, MG_SOCK_ERRNO, strerror(errno)));
iolog(c, buf, n, true);
}
return n;
}
static void write_conn(struct mg_connection *c) {
char *buf = (char *) c->send.buf;
size_t len = c->send.len;
long n = c->is_tls ? mg_tls_send(c, buf, len) : mg_sock_send(c, buf, len);
MG_DEBUG(("%lu %p %d:%d %ld err %d (%s)", c->id, c->fd, (int) c->send.len,
(int) c->recv.len, n, MG_SOCK_ERRNO, strerror(errno)));
iolog(c, buf, n, false);
}
static void close_conn(struct mg_connection *c) {
if (FD(c) != INVALID_SOCKET) {
closesocket(FD(c));
#if MG_ARCH == MG_ARCH_FREERTOS_TCP
FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL);
#endif
c->fd = NULL;
}
mg_close_conn(c);
}
static void setsockopts(struct mg_connection *c) {
#if MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_AZURERTOS
(void) c;
#else
int on = 1;
#if !defined(SOL_TCP)
#define SOL_TCP IPPROTO_TCP
#endif
if (setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (char *) &on, sizeof(on)) != 0)
(void) 0;
#if defined(TCP_QUICKACK)
if (setsockopt(FD(c), SOL_TCP, TCP_QUICKACK, (char *) &on, sizeof(on)) != 0)
(void) 0;
#endif
if (setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (char *) &on, sizeof(on)) !=
0)
(void) 0;
#if (defined(ESP32) && ESP32) || (defined(ESP8266) && ESP8266) || \
defined(__linux__)
int idle = 60;
if (setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(idle)) != 0)
(void) 0;
#endif
#if MG_ARCH != MG_ARCH_WIN32 && !defined(__QNX__) && MG_ARCH != MG_ARCH_ZEPHYR
{
int cnt = 3, intvl = 20;
if (setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPCNT, &cnt, sizeof(cnt)) != 0)
(void) 0;
if (setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPINTVL, &intvl, sizeof(intvl)) !=
0)
(void) 0;
}
#endif
#endif
}
void mg_connect_resolved(struct mg_connection *c) {
// char buf[40];
int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM;
int rc, af = c->rem.is_ip6 ? AF_INET6 : AF_INET;
// mg_straddr(&c->rem, buf, sizeof(buf));
c->fd = S2PTR(socket(af, type, 0));
c->is_resolving = 0;
if (FD(c) == INVALID_SOCKET) {
mg_error(c, "socket(): %d", MG_SOCK_ERRNO);
} else if (c->is_udp) {
mg_call(c, MG_EV_RESOLVE, NULL);
mg_call(c, MG_EV_CONNECT, NULL);
} else {
union usa usa;
socklen_t slen = tousa(&c->rem, &usa);
mg_set_non_blocking_mode(FD(c));
setsockopts(c);
mg_call(c, MG_EV_RESOLVE, NULL);
if ((rc = connect(FD(c), &usa.sa, slen)) == 0) {
mg_call(c, MG_EV_CONNECT, NULL);
} else if (mg_sock_would_block()) {
c->is_connecting = 1;
} else {
mg_error(c, "connect: %d", MG_SOCK_ERRNO);
}
}
MG_DEBUG(("%lu %p", c->id, c->fd));
}
static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
struct mg_connection *c = NULL;
union usa usa;
socklen_t sa_len = sizeof(usa);
SOCKET fd = accept(FD(lsn), &usa.sa, &sa_len);
if (fd == INVALID_SOCKET) {
#if MG_ARCH == MG_ARCH_AZURERTOS
// AzureRTOS, in non-block socket mode can mark listening socket readable
// even it is not. See comment for 'select' func implementation in nx_bsd.c
// That's not an error, just should try later
if (MG_SOCK_ERRNO != EAGAIN)
#endif
MG_ERROR(("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO));
#if ((MG_ARCH != MG_ARCH_WIN32) && (MG_ARCH != MG_ARCH_FREERTOS_TCP))
} else if ((long) fd >= FD_SETSIZE) {
MG_ERROR(("%ld > %ld", (long) fd, (long) FD_SETSIZE));
closesocket(fd);
#endif
} else if ((c = mg_alloc_conn(mgr)) == NULL) {
MG_ERROR(("%lu OOM", lsn->id));
closesocket(fd);
} else {
char buf[40];
tomgaddr(&usa, &c->rem, sa_len != sizeof(usa.sin));
mg_straddr(&c->rem, buf, sizeof(buf));
MG_DEBUG(("%lu accepted %s", c->id, buf));
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->fd = S2PTR(fd);
mg_set_non_blocking_mode(FD(c));
setsockopts(c);
c->is_accepted = 1;
c->is_hexdumping = lsn->is_hexdumping;
c->pfn = lsn->pfn;
c->loc = lsn->loc;
c->pfn_data = lsn->pfn_data;
c->fn = lsn->fn;
c->fn_data = lsn->fn_data;
mg_call(c, MG_EV_OPEN, NULL);
mg_call(c, MG_EV_ACCEPT, NULL);
}
}
static bool mg_socketpair(SOCKET sp[2], union usa usa[2]) {
socklen_t n = sizeof(usa[0].sin);
bool result = false;
(void) memset(&usa[0], 0, sizeof(usa[0]));
usa[0].sin.sin_family = AF_INET;
*(uint32_t *) &usa->sin.sin_addr = mg_htonl(0x7f000001); // 127.0.0.1
usa[1] = usa[0];
if ((sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET &&
(sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET &&
bind(sp[0], &usa[0].sa, n) == 0 && bind(sp[1], &usa[1].sa, n) == 0 &&
getsockname(sp[0], &usa[0].sa, &n) == 0 &&
getsockname(sp[1], &usa[1].sa, &n) == 0 &&
connect(sp[0], &usa[1].sa, n) == 0 &&
connect(sp[1], &usa[0].sa, n) == 0) {
mg_set_non_blocking_mode(sp[1]); // Set close-on-exec
result = true;
} else {
if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
sp[0] = sp[1] = INVALID_SOCKET;
}
return result;
}
bool mg_mgr_wakeup(struct mg_connection *c, const void *buf, size_t len) {
if (buf == NULL || len == 0) buf = (void *) "", len = 1;
return (size_t) send((SOCKET) (size_t) c->pfn_data, (const char *) buf, len,
MSG_NONBLOCKING) == len;
}
static void pf1(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
if (ev == MG_EV_READ) {
mg_iobuf_free(&c->recv);
} else if (ev == MG_EV_CLOSE) {
closesocket((SOCKET) (size_t) c->pfn_data);
}
(void) ev_data, (void) fn_data;
}
struct mg_connection *mg_mkpipe(struct mg_mgr *mgr, mg_event_handler_t fn,
void *fn_data) {
union usa usa[2];
SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET};
struct mg_connection *c = NULL;
if (!mg_socketpair(sp, usa)) {
MG_ERROR(("Cannot create socket pair"));
} else if ((c = mg_alloc_conn(mgr)) == NULL) {
closesocket(sp[0]);
closesocket(sp[1]);
MG_ERROR(("OOM"));
} else {
MG_DEBUG(("pipe %lu", (unsigned long) sp[0]));
tomgaddr(&usa[0], &c->rem, false);
c->fd = S2PTR(sp[1]);
c->is_udp = 1;
c->pfn = pf1;
c->pfn_data = (void *) (size_t) sp[0];
c->fn = fn;
c->fn_data = fn_data;
mg_call(c, MG_EV_OPEN, NULL);
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
}
return c;
}
static void mg_iotest(struct mg_mgr *mgr, int ms) {
#if MG_ARCH == MG_ARCH_FREERTOS_TCP
struct mg_connection *c;
for (c = mgr->conns; c != NULL; c = c->next) {
if (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) continue;
FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_READ | eSELECT_EXCEPT);
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;
FreeRTOS_FD_CLR(c->fd, mgr->ss,
eSELECT_READ | eSELECT_EXCEPT | eSELECT_WRITE);
}
#else
struct timeval tv = {ms / 1000, (ms % 1000) * 1000}, tv_zero = {0, 0};
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) {
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 (mg_tls_pending(c) > 0) tv = tv_zero;
}
if ((rc = select((int) maxfd + 1, &rset, &wset, NULL, &tv)) < 0) {
MG_ERROR(("select: %d %d", rc, MG_SOCK_ERRNO));
FD_ZERO(&rset);
FD_ZERO(&wset);
}
for (c = mgr->conns; c != NULL; c = c->next) {
c->is_readable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset);
c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset);
if (mg_tls_pending(c) > 0) c->is_readable = 1;
}
#endif
}
static void connect_conn(struct mg_connection *c) {
int rc = 0;
#if MG_ARCH != MG_ARCH_FREERTOS_TCP
socklen_t len = sizeof(rc);
if (getsockopt(FD(c), SOL_SOCKET, SO_ERROR, (char *) &rc, &len)) rc = 1;
#endif
if (rc == EAGAIN || rc == EWOULDBLOCK) rc = 0;
c->is_connecting = 0;
if (rc) {
char buf[50];
mg_error(c, "error connecting to %s",
mg_straddr(&c->rem, 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;
uint64_t now;
mg_iotest(mgr, ms);
now = mg_millis();
mg_timer_poll(&mgr->timers, now);
for (c = mgr->conns; c != NULL; c = tmp) {
tmp = c->next;
mg_call(c, MG_EV_POLL, &now);
MG_VERBOSE(("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-',
c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't',
c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h',
c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c'));
if (c->is_resolving || c->is_closing) {
// Do nothing
} else if (c->is_listening && c->is_udp == 0) {
if (c->is_readable) accept_conn(mgr, c);
} else if (c->is_connecting) {
if (c->is_readable || c->is_writable) connect_conn(c);
} else if (c->is_tls_hs) {
if ((c->is_readable || c->is_writable)) mg_tls_handshake(c);
} else {
if (c->is_readable) read_conn(c);
if (c->is_writable) write_conn(c);
}
if (c->is_draining && c->send.len == 0) c->is_closing = 1;
if (c->is_closing) close_conn(c);
}
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/ssi.c"
#endif
#ifndef MG_MAX_SSI_DEPTH
#define MG_MAX_SSI_DEPTH 5
#endif
#ifndef MG_SSI_BUFSIZ
#define MG_SSI_BUFSIZ 1024
#endif
#if MG_ENABLE_SSI
static char *mg_ssi(const char *path, const char *root, int depth) {
struct mg_iobuf b = {NULL, 0, 0};
FILE *fp = fopen(path, "rb");
if (fp != NULL) {
char buf[MG_SSI_BUFSIZ] = "", arg[sizeof(buf)] = "";
int ch, intag = 0;
size_t len = 0, align = MG_IO_SIZE;
while ((ch = fgetc(fp)) != EOF) {
if (intag && ch == '>' && buf[len - 1] == '-' && buf[len - 2] == '-') {
buf[len++] = (char) (ch & 0xff);
if (sscanf(buf, "<!--#include file=\"%[^\"]", arg)) {
char tmp[MG_PATH_MAX + MG_SSI_BUFSIZ + 10],
*p = (char *) path + strlen(path), *data;
while (p > path && p[-1] != MG_DIRSEP && p[-1] != '/') p--;
mg_snprintf(tmp, sizeof(tmp), "%.*s%s", (int) (p - path), path, arg);
if (depth < MG_MAX_SSI_DEPTH &&
(data = mg_ssi(tmp, root, depth + 1)) != NULL) {
mg_iobuf_add(&b, b.len, data, strlen(data), align);
free(data);
} else {
MG_ERROR(("%s: file=%s error or too deep", path, arg));
}
} else if (sscanf(buf, "<!--#include virtual=\"%[^\"]", arg)) {
char tmp[MG_PATH_MAX + MG_SSI_BUFSIZ + 10], *data;
mg_snprintf(tmp, sizeof(tmp), "%s%s", root, arg);
if (depth < MG_MAX_SSI_DEPTH &&
(data = mg_ssi(tmp, root, depth + 1)) != NULL) {
mg_iobuf_add(&b, b.len, data, strlen(data), align);
free(data);
} else {
MG_ERROR(("%s: virtual=%s error or too deep", path, arg));
}
} else {
// Unknown SSI tag
MG_ERROR(("Unknown SSI tag: %.*s", (int) len, buf));
mg_iobuf_add(&b, b.len, buf, len, align);
}
intag = 0;
len = 0;
} else if (ch == '<') {
intag = 1;
if (len > 0) mg_iobuf_add(&b, b.len, buf, len, align);
len = 0;
buf[len++] = (char) (ch & 0xff);
} else if (intag) {
if (len == 5 && strncmp(buf, "<!--#", 5) != 0) {
intag = 0;
} else if (len >= sizeof(buf) - 2) {
MG_ERROR(("%s: SSI tag is too large", path));
len = 0;
}
buf[len++] = (char) (ch & 0xff);
} else {
buf[len++] = (char) (ch & 0xff);
if (len >= sizeof(buf)) {
mg_iobuf_add(&b, b.len, buf, len, align);
len = 0;
}
}
}
if (len > 0) mg_iobuf_add(&b, b.len, buf, len, align);
if (b.len > 0) mg_iobuf_add(&b, b.len, "", 1, align); // nul-terminate
fclose(fp);
}
(void) depth;
(void) root;
return (char *) b.buf;
}
void mg_http_serve_ssi(struct mg_connection *c, const char *root,
const char *fullpath) {
const char *headers = "Content-Type: text/html; charset=utf-8\r\n";
char *data = mg_ssi(fullpath, root, 0);
mg_http_reply(c, 200, headers, "%s", data == NULL ? "" : data);
free(data);
}
#else
void mg_http_serve_ssi(struct mg_connection *c, const char *root,
const char *fullpath) {
mg_http_reply(c, 501, NULL, "SSI not enabled");
(void) root, (void) fullpath;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/str.c"
#endif
#include <stdlib.h>
struct mg_str mg_str_s(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) {
int c = *s;
if (c >= 'A' && c <= 'Z') c += 'a' - 'A';
return c;
}
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 *) calloc(1, 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;
}
static bool is_digit(int c) {
return c >= '0' && c <= '9';
}
static bool is_space(int c) {
return c == ' ' || c == '\r' || c == '\n' || c == '\t';
}
struct mg_str mg_strstrip(struct mg_str s) {
while (s.len > 0 && is_space((int) *s.ptr)) s.ptr++, s.len--;
while (s.len > 0 && is_space((int) *(s.ptr + s.len - 1))) s.len--;
return s;
}
bool mg_match(struct mg_str s, struct mg_str p, struct mg_str *caps) {
size_t i = 0, j = 0, ni = 0, nj = 0;
if (caps) caps->ptr = NULL, caps->len = 0;
while (i < p.len || j < s.len) {
if (i < p.len && j < s.len && (p.ptr[i] == '?' || s.ptr[j] == p.ptr[i])) {
if (caps == NULL) {
} else if (p.ptr[i] == '?') {
caps->ptr = &s.ptr[j], caps->len = 1; // Finalize `?` cap
caps++, caps->ptr = NULL, caps->len = 0; // Init next cap
} else if (caps->ptr != NULL && caps->len == 0) {
caps->len = (size_t) (&s.ptr[j] - caps->ptr); // Finalize current cap
caps++, caps->len = 0, caps->ptr = NULL; // Init next cap
}
i++, j++;
} else if (i < p.len && (p.ptr[i] == '*' || p.ptr[i] == '#')) {
if (caps && !caps->ptr) caps->len = 0, caps->ptr = &s.ptr[j]; // Init cap
ni = i++, nj = j + 1;
} else if (nj > 0 && nj <= s.len && (p.ptr[ni] == '#' || s.ptr[j] != '/')) {
i = ni, j = nj;
if (caps && caps->ptr == NULL && caps->len == 0) {
caps--, caps->len = 0; // Restart previous cap
}
} else {
return false;
}
}
if (caps && caps->ptr && caps->len == 0) {
caps->len = (size_t) (&s.ptr[j] - caps->ptr);
}
return true;
}
bool mg_globmatch(const char *s1, size_t n1, const char *s2, size_t n2) {
return mg_match(mg_str_n(s2, n2), mg_str_n(s1, n1), NULL);
}
static size_t mg_nce(const char *s, size_t n, size_t ofs, size_t *koff,
size_t *klen, size_t *voff, size_t *vlen) {
size_t kvlen, kl;
for (kvlen = 0; ofs + kvlen < n && 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;
ofs += kvlen + 1;
return ofs > n ? n : ofs;
}
bool mg_commalist(struct mg_str *s, struct mg_str *k, struct mg_str *v) {
size_t koff = 0, klen = 0, voff = 0, vlen = 0, off = 0;
if (s->ptr == NULL || s->len == 0) return 0;
off = mg_nce(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;
}
size_t mg_snprintf(char *buf, size_t len, const char *fmt, ...) {
va_list ap;
size_t n;
va_start(ap, fmt);
n = mg_vsnprintf(buf, len, fmt, ap);
va_end(ap);
return n;
}
char *mg_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 *) calloc(1, dlen);
if (dst == NULL) return dst;
for (i = 0; i < len; i++) {
idx = i % 16;
if (idx == 0) {
if (i > 0 && dlen > n)
n += mg_snprintf(dst + n, dlen - n, " %s\n", ascii);
if (dlen > n)
n += mg_snprintf(dst + n, dlen - n, "%04x ", (int) (i + ofs));
}
if (dlen < n) break;
n += mg_snprintf(dst + n, dlen - n, " %02x", p[i]);
ascii[idx] = (char) (p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i]);
ascii[idx + 1] = '\0';
}
while (i++ % 16) {
if (n < dlen) n += mg_snprintf(dst + n, dlen - n, "%s", " ");
}
if (n < dlen) n += mg_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, size_t len, char *to) {
const unsigned char *p = (const unsigned char *) buf;
const char *hex = "0123456789abcdef";
size_t i = 0;
for (; len--; p++) {
to[i++] = hex[p[0] >> 4];
to[i++] = hex[p[0] & 0x0f];
}
to[i] = '\0';
return to;
}
static unsigned char mg_unhex_nimble(unsigned char c) {
return (c >= '0' && c <= '9') ? (unsigned char) (c - '0')
: (c >= 'A' && c <= 'F') ? (unsigned char) (c - '7')
: (unsigned char) (c - 'W');
}
unsigned long mg_unhexn(const char *s, size_t len) {
unsigned long i = 0, v = 0;
for (i = 0; i < len; i++) v <<= 4, v |= mg_unhex_nimble(((uint8_t *) s)[i]);
return v;
}
void mg_unhex(const char *buf, size_t len, unsigned char *to) {
size_t i;
for (i = 0; i < len; i += 2) {
to[i >> 1] = (unsigned char) mg_unhexn(&buf[i], 2);
}
}
size_t mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap) {
va_list ap_copy;
size_t len;
va_copy(ap_copy, ap);
len = mg_vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
if (len >= size) {
// Allocate a buffer that is large enough
if ((*buf = (char *) calloc(1, len + 1)) == NULL) {
len = 0;
} else {
va_copy(ap_copy, ap);
len = mg_vsnprintf(*buf, len + 1, fmt, ap_copy);
va_end(ap_copy);
}
}
return len;
}
size_t mg_asprintf(char **buf, size_t size, const char *fmt, ...) {
size_t ret;
va_list ap;
va_start(ap, fmt);
ret = mg_vasprintf(buf, size, fmt, ap);
va_end(ap);
return ret;
}
uint64_t mg_tou64(struct mg_str str) {
uint64_t result = 0;
size_t i = 0;
while (i < str.len && (str.ptr[i] == ' ' || str.ptr[i] == '\t')) i++;
while (i < str.len && str.ptr[i] >= '0' && str.ptr[i] <= '9') {
result *= 10;
result += (unsigned) (str.ptr[i] - '0');
i++;
}
return result;
}
int64_t mg_to64(struct mg_str str) {
int64_t result = 0, neg = 1, max = 922337203685477570 /* INT64_MAX/10-10 */;
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') {
if (result > max) return 0;
result *= 10;
result += (str.ptr[i] - '0');
i++;
}
return result * neg;
}
size_t mg_lld(char *buf, int64_t val, bool is_signed, bool is_hex) {
const char *letters = "0123456789abcdef";
uint64_t v = (uint64_t) val;
size_t s = 0, n, i;
if (is_signed && val < 0) buf[s++] = '-', v = (uint64_t) (-val);
// This loop prints a number in reverse order. I guess this is because we
// write numbers from right to left: least significant digit comes last.
// Maybe because we use Arabic numbers, and Arabs write RTL?
if (is_hex) {
for (n = 0; v; v >>= 4) buf[s + n++] = letters[v & 15];
} else {
for (n = 0; v; v /= 10) buf[s + n++] = letters[v % 10];
}
// Reverse a string
for (i = 0; i < n / 2; i++) {
char t = buf[s + i];
buf[s + i] = buf[s + n - i - 1], buf[s + n - i - 1] = t;
}
if (val == 0) buf[n++] = '0'; // Handle special case
return n + s;
}
static size_t mg_copys(char *buf, size_t len, size_t n, char *p, size_t k) {
size_t j = 0;
for (j = 0; j < k && p[j]; j++)
if (j + n < len) buf[n + j] = p[j];
return j;
}
size_t mg_vsnprintf(char *buf, size_t len, const char *fmt, va_list ap) {
size_t i = 0, n = 0;
while (fmt[i] != '\0') {
if (fmt[i] == '%') {
size_t j, k, x = 0, is_long = 0, w = 0 /* width */, pr = 0 /* prec */;
char pad = ' ', minus = 0, c = fmt[++i];
if (c == '#') x++, c = fmt[++i];
if (c == '-') minus++, c = fmt[++i];
if (c == '0') pad = '0', c = fmt[++i];
while (is_digit(c)) w *= 10, w += (size_t) (c - '0'), c = fmt[++i];
if (c == '.') {
c = fmt[++i];
if (c == '*') {
pr = (size_t) va_arg(ap, int);
c = fmt[++i];
} else {
while (is_digit(c)) pr *= 10, pr += (size_t) (c - '0'), c = fmt[++i];
}
}
while (c == 'h') c = fmt[++i]; // Treat h and hh as int
if (c == 'l') {
is_long++, c = fmt[++i];
if (c == 'l') is_long++, c = fmt[++i];
}
if (c == 'p') x = 1, is_long = 1;
if (c == 'd' || c == 'u' || c == 'x' || c == 'X' || c == 'p') {
bool s = (c == 'd'), h = (c == 'x' || c == 'X' || c == 'p');
char tmp[30];
size_t xl = x ? 2 : 0;
if (is_long == 2) {
int64_t v = va_arg(ap, int64_t);
k = mg_lld(tmp, v, s, h);
} else if (is_long == 1) {
long v = va_arg(ap, long);
k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned long) v, s, h);
} else {
int v = va_arg(ap, int);
k = mg_lld(tmp, s ? (int64_t) v : (int64_t) (unsigned) v, s, h);
}
for (j = 0; j < xl && w > 0; j++) w--;
for (j = 0; pad == ' ' && !minus && k < w && j + k < w; j++)
n += mg_copys(buf, len, n, &pad, 1);
n += mg_copys(buf, len, n, (char *) "0x", xl);
for (j = 0; pad == '0' && k < w && j + k < w; j++)
n += mg_copys(buf, len, n, &pad, 1);
n += mg_copys(buf, len, n, tmp, k);
for (j = 0; pad == ' ' && minus && k < w && j + k < w; j++)
n += mg_copys(buf, len, n, &pad, 1);
} else if (c == 'c') {
int p = va_arg(ap, int);
if (n < len) buf[n] = (char) p;
n++;
} else if (c == 's') {
char *p = va_arg(ap, char *);
if (pr == 0) pr = p == NULL ? 0 : strlen(p);
for (j = 0; !minus && pr < w && j + pr < w; j++)
n += mg_copys(buf, len, n, &pad, 1);
n += mg_copys(buf, len, n, p, pr);
for (j = 0; minus && pr < w && j + pr < w; j++)
n += mg_copys(buf, len, n, &pad, 1);
} else if (c == '%') {
if (n < len) buf[n] = '%';
n++;
} else {
if (n < len) buf[n] = '%';
n++;
if (n < len) buf[n] = c;
n++;
}
i++;
} else {
if (n < len) buf[n] = fmt[i];
n++, i++;
}
}
if (n < len) buf[n] = '\0';
return n;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/timer.c"
#endif
// Copyright (c) Cesanta Software Limited
// All rights reserved
void mg_timer_init(struct mg_timer **head, struct mg_timer *t, uint64_t ms,
unsigned flags, void (*fn)(void *), void *arg) {
struct mg_timer tmp = {ms, 0U, 0U, flags, fn, arg, *head};
*t = tmp;
*head = t;
if (flags & MG_TIMER_RUN_NOW) fn(arg);
}
void mg_timer_free(struct mg_timer **head, struct mg_timer *t) {
while (*head && *head != t) head = &(*head)->next;
if (*head) *head = t->next;
}
void mg_timer_poll(struct mg_timer **head, uint64_t now_ms) {
// If time goes back (wrapped around), reset timers
struct mg_timer *t, *tmp;
for (t = *head; t != NULL; t = tmp) {
tmp = t->next;
if (t->prev_ms > now_ms) t->expire = 0; // Handle time wrap
t->prev_ms = now_ms;
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 > t->period_ms ? now_ms + t->period_ms
: t->expire + t->period_ms;
if (!(t->flags & MG_TIMER_REPEAT)) mg_timer_free(head, t);
}
}
#ifdef MG_ENABLE_LINES
#line 1 "src/tls_dummy.c"
#endif
#if !MG_ENABLE_MBEDTLS && !MG_ENABLE_OPENSSL && !MG_ENABLE_CUSTOM_TLS
void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
(void) opts;
mg_error(c, "TLS is not enabled");
}
void mg_tls_handshake(struct mg_connection *c) {
(void) c;
}
void mg_tls_free(struct mg_connection *c) {
(void) c;
}
long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
return c == NULL || buf == NULL || len == 0 ? 0 : -1;
}
long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
return c == NULL || buf == NULL || len == 0 ? 0 : -1;
}
size_t mg_tls_pending(struct mg_connection *c) {
(void) c;
return 0;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/tls_mbed.c"
#endif
#if MG_ENABLE_MBEDTLS
#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000
#define MGRNG , rng_get, NULL
#else
#define MGRNG
#endif
void mg_tls_free(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
if (tls != NULL) {
free(tls->cafile);
mbedtls_ssl_free(&tls->ssl);
mbedtls_pk_free(&tls->pk);
mbedtls_x509_crt_free(&tls->ca);
mbedtls_x509_crt_free(&tls->cert);
mbedtls_ssl_config_free(&tls->conf);
free(tls);
c->tls = NULL;
}
}
bool mg_sock_would_block(void);
bool mg_sock_conn_reset(void);
static int mg_net_send(void *ctx, const unsigned char *buf, size_t len) {
struct mg_connection *c = (struct mg_connection *) ctx;
int fd = (int) (size_t) c->fd;
int n = (int) send(fd, buf, len, 0);
MG_VERBOSE(("%lu n=%d, errno=%d", c->id, n, errno));
if (n < 0) {
if (mg_sock_would_block()) return MBEDTLS_ERR_SSL_WANT_WRITE;
if (mg_sock_conn_reset()) return MBEDTLS_ERR_NET_CONN_RESET;
return MBEDTLS_ERR_NET_SEND_FAILED;
}
return n;
}
static int mg_net_recv(void *ctx, unsigned char *buf, size_t len) {
struct mg_connection *c = (struct mg_connection *) ctx;
int n, fd = (int) (size_t) c->fd;
n = (int) recv(fd, buf, len, 0);
MG_VERBOSE(("%lu n=%d, errno=%d", c->id, n, errno));
if (n < 0) {
if (mg_sock_would_block()) return MBEDTLS_ERR_SSL_WANT_READ;
if (mg_sock_conn_reset()) return MBEDTLS_ERR_NET_CONN_RESET;
return MBEDTLS_ERR_NET_RECV_FAILED;
}
return n;
}
void 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, mg_net_send, mg_net_recv, 0);
rc = mbedtls_ssl_handshake(&tls->ssl);
if (rc == 0) { // Success
MG_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
MG_VERBOSE(("%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
}
}
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 = (int) strlen(s2) - 1;
MG_VERBOSE(("%lu %d %.*s", ((struct mg_connection *) c)->id, lev, n, s2));
(void) s;
}
#if defined(MBEDTLS_VERSION_NUMBER) && MBEDTLS_VERSION_NUMBER >= 0x03000000
static int rng_get(void *p_rng, unsigned char *buf, size_t len) {
(void) p_rng;
mg_random(buf, len);
return 0;
}
#endif
static struct mg_str mg_loadfile(struct mg_fs *fs, const char *path) {
size_t n = 0;
if (path[0] == '-') return mg_str(path);
char *p = mg_file_read(fs, path, &n);
return mg_str_n(p, n);
}
void mg_tls_init(struct mg_connection *c, const struct mg_tls_opts *opts) {
struct mg_fs *fs = opts->fs == NULL ? &mg_fs_posix : opts->fs;
struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls));
int rc = 0;
c->tls = tls;
if (c->tls == NULL) {
mg_error(c, "TLS OOM");
goto fail;
}
MG_DEBUG(("%lu Setting TLS", c->id));
mbedtls_ssl_init(&tls->ssl);
mbedtls_ssl_config_init(&tls->conf);
mbedtls_x509_crt_init(&tls->ca);
mbedtls_x509_crt_init(&tls->cert);
mbedtls_pk_init(&tls->pk);
mbedtls_ssl_conf_dbg(&tls->conf, debug_cb, c);
#if defined(MG_MBEDTLS_DEBUG_LEVEL)
mbedtls_debug_set_threshold(MG_MBEDTLS_DEBUG_LEVEL);
#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);
} else 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", tls->cafile, -rc);
goto fail;
}
#else
struct mg_str s = mg_loadfile(fs, opts->ca);
rc = mbedtls_x509_crt_parse(&tls->ca, (uint8_t *) s.ptr, s.len + 1);
if (opts->ca[0] != '-') free((char *) s.ptr);
if (rc != 0) {
mg_error(c, "parse(%s) err %#x", opts->ca, -rc);
goto fail;
}
mbedtls_ssl_conf_ca_chain(&tls->conf, &tls->ca, NULL);
#endif
if (opts->srvname.len > 0) {
char mem[128], *buf = mem;
mg_asprintf(&buf, sizeof(mem), "%.*s", (int) opts->srvname.len,
opts->srvname.ptr);
mbedtls_ssl_set_hostname(&tls->ssl, buf);
if (buf != mem) free(buf);
}
mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
}
if (opts->cert != NULL && opts->cert[0] != '\0') {
struct mg_str s = mg_loadfile(fs, opts->cert);
const char *key = opts->certkey == NULL ? opts->cert : opts->certkey;
rc = mbedtls_x509_crt_parse(&tls->cert, (uint8_t *) s.ptr, s.len + 1);
if (opts->cert[0] != '-') free((char *) s.ptr);
if (rc != 0) {
mg_error(c, "parse(%s) err %#x", opts->cert, -rc);
goto fail;
}
s = mg_loadfile(fs, key);
rc = mbedtls_pk_parse_key(&tls->pk, (uint8_t *) s.ptr, s.len + 1, NULL,
0 MGRNG);
if (key[0] != '-') free((char *) s.ptr);
if (rc != 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;
fail:
mg_tls_free(c);
}
size_t mg_tls_pending(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
return tls == NULL ? 0 : mbedtls_ssl_get_bytes_avail(&tls->ssl);
}
long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
long n = mbedtls_ssl_read(&tls->ssl, (unsigned char *) buf, len);
return n == 0 ? -1 : n == MBEDTLS_ERR_SSL_WANT_READ ? 0 : n;
}
long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
long n = mbedtls_ssl_write(&tls->ssl, (unsigned char *) buf, len);
return n == 0 ? -1 : n == MBEDTLS_ERR_SSL_WANT_WRITE ? 0 : n;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/tls_openssl.c"
#endif
#if MG_ENABLE_OPENSSL
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.
if (err != 0) ERR_print_errors_fp(stderr);
ERR_clear_error();
if (err == SSL_ERROR_WANT_READ) return 0;
if (err == SSL_ERROR_WANT_WRITE) return 0;
return err;
}
void mg_tls_init(struct mg_connection *c, const 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 (tls == NULL) {
mg_error(c, "TLS OOM");
goto fail;
}
if (!s_initialised) {
SSL_library_init();
s_initialised++;
}
MG_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,
(unsigned) 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);
SSL_set_options(tls->ssl, SSL_OP_NO_TLSv1_1);
#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') {
SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
NULL);
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;
}
}
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 > 0x10100000L
} 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 OPENSSL_VERSION_NUMBER > 0x10002000L
if (opts->srvname.len > 0) {
char mem[128], *buf = mem;
size_t len = mg_asprintf(&buf, sizeof(mem), "%.*s", (int) opts->srvname.len,
opts->srvname.ptr);
X509_VERIFY_PARAM_set1_host(SSL_get0_param(tls->ssl), buf, len);
if (buf != mem) free(buf);
}
#endif
if (opts->ciphers != NULL) SSL_set_cipher_list(tls->ssl, opts->ciphers);
if (opts->srvname.len > 0) {
char mem[128], *buf = mem;
mg_asprintf(&buf, sizeof(mem), "%.*s", (int) opts->srvname.len,
opts->srvname.ptr);
SSL_set_tlsext_host_name(tls->ssl, buf);
if (buf != mem) free(buf);
}
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);
}
MG_DEBUG(("%lu SSL %s OK", c->id, c->is_accepted ? "accept" : "client"));
return;
fail:
c->is_closing = 1;
free(tls);
}
void mg_tls_handshake(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int rc;
SSL_set_fd(tls->ssl, (int) (size_t) c->fd);
rc = c->is_client ? SSL_connect(tls->ssl) : SSL_accept(tls->ssl);
if (rc == 1) {
MG_DEBUG(("%lu success", c->id));
c->is_tls_hs = 0;
} else {
int code = mg_tls_err(tls, rc);
if (code != 0) mg_error(c, "tls hs: rc %d, err %d", rc, code);
}
}
void mg_tls_free(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
if (tls == NULL) return;
SSL_free(tls->ssl);
SSL_CTX_free(tls->ctx);
free(tls);
c->tls = NULL;
}
size_t mg_tls_pending(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
return tls == NULL ? 0 : (size_t) SSL_pending(tls->ssl);
}
long mg_tls_recv(struct mg_connection *c, void *buf, size_t len) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = SSL_read(tls->ssl, buf, (int) len);
return n == 0 ? -1 : n < 0 && mg_tls_err(tls, n) == 0 ? 0 : n;
}
long mg_tls_send(struct mg_connection *c, const void *buf, size_t len) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = SSL_write(tls->ssl, buf, (int) len);
return n == 0 ? -1 : n < 0 && mg_tls_err(tls, n) == 0 ? 0 : n;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/url.c"
#endif
#include <stdlib.h>
struct url {
size_t 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) {
size_t i;
struct url u;
memset(&u, 0, sizeof(u));
for (i = 0; url[i] != '\0'; i++) {
if (i > 0 && u.host == 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 == 0 && u.uri == 0) {
u.port = i + 1;
} else if (url[i] == '@' && u.user == 0 && u.pass == 0) {
u.user = u.host;
u.pass = u.port;
u.host = i + 1;
u.port = 0;
} else if (u.host && u.uri == 0 && 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);
size_t 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);
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 (strncmp(url, "http:", 5) == 0 || strncmp(url, "ws:", 3) == 0) port = 80;
if (strncmp(url, "wss:", 4) == 0 || strncmp(url, "https:", 6) == 0)
port = 443;
if (strncmp(url, "mqtt:", 5) == 0) port = 1883;
if (strncmp(url, "mqtts:", 6) == 0) port = 8883;
if (u.port) port = (unsigned short) 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)) {
size_t 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_n("", 0UL);
if (u.pass && u.host) {
size_t 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
#if MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
#include <mach/mach_time.h>
#endif
#if MG_ENABLE_CUSTOM_RANDOM
#else
void mg_random(void *buf, size_t len) {
bool done = false;
unsigned char *p = (unsigned char *) buf;
#if MG_ARCH == MG_ARCH_ESP32
while (len--) *p++ = (unsigned char) (esp_random() & 255);
done = true;
#elif MG_ARCH == MG_ARCH_WIN32
#elif MG_ARCH == MG_ARCH_UNIX
FILE *fp = fopen("/dev/urandom", "rb");
if (fp != NULL) {
if (fread(buf, 1, len, fp) == len) done = true;
fclose(fp);
}
#endif
// If everything above did not work, fallback to a pseudo random generator
while (!done && len--) *p++ = (unsigned char) (rand() & 255);
}
#endif
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) ((uint16_t) data[1] | (((uint16_t) data[0]) << 8));
}
uint32_t mg_crc32(uint32_t crc, const char *buf, size_t len) {
int i;
crc = ~crc;
while (len--) {
crc ^= *(unsigned char *) buf++;
for (i = 0; i < 8; i++) crc = crc & 1 ? (crc >> 1) ^ 0xedb88320 : crc >> 1;
}
return ~crc;
}
static int isbyte(int n) {
return n >= 0 && n <= 255;
}
static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
int n, a, b, c, d, slash = 32, len = 0;
if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0 &&
slash < 33) {
len = n;
*net = ((uint32_t) a << 24) | ((uint32_t) b << 16) | ((uint32_t) c << 8) |
(uint32_t) d;
*mask = slash ? (uint32_t) (0xffffffffU << (32 - slash)) : (uint32_t) 0;
}
return len;
}
int mg_check_ip_acl(struct mg_str acl, uint32_t remote_ip) {
struct mg_str k, v;
int allowed = acl.len == 0 ? '+' : '-'; // If any ACL is set, deny by default
while (mg_commalist(&acl, &k, &v)) {
uint32_t net, mask;
if (k.ptr[0] != '+' && k.ptr[0] != '-') return -1;
if (parse_net(&k.ptr[1], &net, &mask) == 0) return -2;
if ((mg_ntohl(remote_ip) & mask) == net) allowed = k.ptr[0];
}
return allowed == '+';
}
#if MG_ENABLE_CUSTOM_MILLIS
#else
uint64_t 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 xTaskGetTickCount() * portTICK_PERIOD_MS;
#elif MG_ARCH == MG_ARCH_FREERTOS_TCP || MG_ARCH == MG_ARCH_FREERTOS_LWIP
return xTaskGetTickCount() * portTICK_PERIOD_MS;
#elif MG_ARCH == MG_ARCH_AZURERTOS
return tx_time_get() * (1000 /* MS per SEC */ / TX_TIMER_TICKS_PER_SECOND);
#elif MG_ARCH == MG_ARCH_UNIX && defined(__APPLE__)
uint64_t ticks = mach_absolute_time();
static mach_timebase_info_data_t timebase;
mach_timebase_info(&timebase);
double ticks_to_nanos = (double) timebase.numer / timebase.denom;
uint64_t uptime_nanos = (uint64_t) (ticks_to_nanos * ticks);
return (uint64_t) (uptime_nanos / 1000000);
#elif MG_ARCH == MG_ARCH_UNIX
struct timespec ts;
#ifdef _POSIX_MONOTONIC_CLOCK
#ifdef CLOCK_MONOTONIC_RAW
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
#else
clock_gettime(CLOCK_MONOTONIC, &ts);
#endif
#else
clock_gettime(CLOCK_REALTIME, &ts);
#endif
return ((uint64_t) ts.tv_sec * 1000 + (uint64_t) ts.tv_nsec / 1000000);
#else
return (uint64_t) (time(NULL) * 1000);
#endif
}
#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 struct mg_str *wskey,
const struct mg_str *wsproto, const char *fmt,
va_list ap) {
const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
unsigned char sha[20], b64_sha[30];
char mem[128], *buf = mem;
mg_sha1_ctx sha_ctx;
mg_sha1_init(&sha_ctx);
mg_sha1_update(&sha_ctx, (unsigned char *) wskey->ptr, wskey->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);
buf[0] = '\0';
if (fmt != NULL) mg_vasprintf(&buf, sizeof(mem), fmt, ap);
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"
"%s",
b64_sha, buf);
if (buf != mem) free(buf);
if (wsproto != NULL) {
mg_printf(c, "Sec-WebSocket-Protocol: %.*s\r\n", (int) wsproto->len,
wsproto->ptr);
}
mg_send(c, "\r\n", 2);
}
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; // Frame length
mask_len = buf[1] & 128 ? 4 : 0; // last bit is a mask bit
msg->flags = buf[0];
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 =
(size_t) (((uint64_t) mg_ntohl(*(uint32_t *) &buf[2])) << 32) +
mg_ntohl(*(uint32_t *) &buf[6]);
}
}
// Sanity check, and integer overflow protection for the boundary check below
// data_len should not be larger than 1 Gb
if (msg->data_len > 1024 * 1024 * 1024) return 0;
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;
}
static size_t mkhdr(size_t len, int op, bool is_client, uint8_t *buf) {
size_t n = 0;
buf[0] = (uint8_t) (op | 128);
if (len < 126) {
buf[1] = (unsigned char) len;
n = 2;
} else if (len < 65536) {
uint16_t tmp = mg_htons((uint16_t) len);
buf[1] = 126;
memcpy(&buf[2], &tmp, sizeof(tmp));
n = 4;
} else {
uint32_t tmp;
buf[1] = 127;
tmp = mg_htonl((uint32_t) ((uint64_t) len >> 32));
memcpy(&buf[2], &tmp, sizeof(tmp));
tmp = mg_htonl((uint32_t) (len & 0xffffffff));
memcpy(&buf[6], &tmp, sizeof(tmp));
n = 10;
}
if (is_client) {
buf[1] |= 1 << 7; // Set masking flag
mg_random(&buf[n], 4);
n += 4;
}
return n;
}
static void mg_ws_mask(struct mg_connection *c, size_t len) {
if (c->is_client && c->send.buf != NULL) {
size_t i;
uint8_t *p = c->send.buf + c->send.len - len, *mask = p - 4;
for (i = 0; i < len; i++) p[i] ^= mask[i & 3];
}
}
size_t mg_ws_send(struct mg_connection *c, const char *buf, size_t len,
int op) {
uint8_t header[14];
size_t header_len = mkhdr(len, op, c->is_client, header);
mg_send(c, header, header_len);
MG_VERBOSE(("WS out: %d [%.*s]", (int) len, (int) len, buf));
mg_send(c, buf, len);
mg_ws_mask(c, len);
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;
size_t ofs = (size_t) c->pfn_data;
// assert(ofs < c->recv.len);
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) {
MG_ERROR(("%lu WS handshake error: %.*s", c->id, 15, c->recv.buf));
c->is_closing = 1;
} else {
struct mg_http_message hm;
mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
c->is_websocket = 1;
mg_call(c, MG_EV_WS_OPEN, &hm);
}
mg_iobuf_del(&c->recv, 0, (size_t) n);
} else {
return; // A request is not yet received
}
}
while (ws_process(c->recv.buf + ofs, c->recv.len - ofs, &msg) > 0) {
char *s = (char *) c->recv.buf + ofs + msg.header_len;
struct mg_ws_message m = {{s, msg.data_len}, msg.flags};
size_t len = msg.header_len + msg.data_len;
uint8_t final = msg.flags & 128, op = msg.flags & 15;
// MG_VERBOSE ("fin %d op %d len %d [%.*s]", final, op,
// (int) m.data.len, (int) m.data.len, m.data.ptr));
switch (op) {
case WEBSOCKET_OP_CONTINUE:
mg_call(c, MG_EV_WS_CTL, &m);
break;
case WEBSOCKET_OP_PING:
MG_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_TEXT:
case WEBSOCKET_OP_BINARY:
if (final) mg_call(c, MG_EV_WS_MSG, &m);
break;
case WEBSOCKET_OP_CLOSE:
MG_DEBUG(("%lu Got WS CLOSE", c->id));
mg_call(c, MG_EV_WS_CTL, &m);
mg_ws_send(c, "", 0, WEBSOCKET_OP_CLOSE);
c->is_draining = 1;
break;
default:
// Per RFC6455, close conn when an unknown op is recvd
mg_error(c, "unknown WS op %d", op);
break;
}
// Handle fragmented frames: strip header, keep in c->recv
if (final == 0 || op == 0) {
if (op) ofs++, len--, msg.header_len--; // First frame
mg_iobuf_del(&c->recv, ofs, msg.header_len); // Strip header
len -= msg.header_len;
ofs += len;
c->pfn_data = (void *) ofs;
// MG_INFO(("FRAG %d [%.*s]", (int) ofs, (int) ofs, c->recv.buf));
}
// Remove non-fragmented frame
if (final && op) mg_iobuf_del(&c->recv, ofs, len);
// Last chunk of the fragmented frame
if (final && !op) {
m.flags = c->recv.buf[0];
m.data = mg_str_n((char *) &c->recv.buf[1], (size_t) (ofs - 1));
mg_call(c, MG_EV_WS_MSG, &m);
mg_iobuf_del(&c->recv, 0, ofs);
ofs = 0;
c->pfn_data = NULL;
}
}
}
(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);
size_t n1 = 0, n2 = 0;
nonce[0] = key[0] = mem1[0] = mem2[0] = '\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_random(nonce, sizeof(nonce));
mg_base64_encode((unsigned char *) nonce, sizeof(nonce), key);
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, (int) n1, buf1,
key);
mg_send(c, buf2, n2);
if (buf1 != mem1) free(buf1);
if (buf2 != mem2) free(buf2);
c->pfn = mg_ws_cb;
c->pfn_data = NULL;
}
return c;
}
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm,
const char *fmt, ...) {
struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key");
c->pfn = mg_ws_cb;
c->pfn_data = NULL;
if (wskey == NULL) {
mg_http_reply(c, 426, "", "WS upgrade expected\n");
c->is_draining = 1;
} else {
struct mg_str *wsproto = mg_http_get_header(hm, "Sec-WebSocket-Protocol");
va_list ap;
va_start(ap, fmt);
ws_handshake(c, wskey, wsproto, fmt, ap);
va_end(ap);
c->is_websocket = 1;
mg_call(c, MG_EV_WS_OPEN, hm);
}
}
size_t mg_ws_wrap(struct mg_connection *c, size_t len, int op) {
uint8_t header[14], *p;
size_t header_len = mkhdr(len, op, c->is_client, header);
// NOTE: order of operations is important!
mg_iobuf_add(&c->send, c->send.len, NULL, header_len, MG_IO_SIZE);
p = &c->send.buf[c->send.len - len]; // p points to data
memmove(p, p - header_len, len); // Shift data
memcpy(p - header_len, header, header_len); // Prepend header
mg_ws_mask(c, len); // Mask data
return c->send.len;
}
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