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// Copyright (c) 2004-2013 Sergey Lyubka
// Copyright (c) 2013-2020 Cesanta Software Limited
// All rights reserved
//
// This software is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <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.cesanta.com/license>.
#include "mongoose.h"
#ifdef MG_ENABLE_LINES
#line 1 "src/private.h"
#endif
void mg_connect_resolved(struct mg_connection *);
#if MG_ARCH == MG_ARCH_FREERTOS
static inline void *mg_calloc(int cnt, size_t size) {
void *p = pvPortMalloc(size);
if (p != NULL) memset(p, 0, size);
return p;
}
#define calloc(a, b) mg_calloc((a), (b))
#define malloc(a) pvPortMalloc(a)
#define free(a) vPortFree(a)
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/base64.c"
#endif
#include <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) {
unsigned char rem = (n & 3) % 3;
if (rem == 0) {
to[n] = mg_b64idx(ch >> 2);
to[++n] = (ch & 3) << 4;
} else if (rem == 1) {
to[n] = mg_b64idx(to[n] | (ch >> 4));
to[++n] = (ch & 15) << 2;
} else {
to[n] = mg_b64idx(to[n] | (ch >> 6));
to[++n] = mg_b64idx(ch & 63);
n++;
}
return n;
}
int mg_base64_final(char *to, int n) {
int saved = n;
// printf("---[%.*s]\n", n, to);
if (n & 3) n = mg_base64_update(0, to, n);
if ((saved & 3) == 2) n--;
// printf(" %d[%.*s]\n", n, n, to);
while (n & 3) to[n++] = '=';
to[n] = '\0';
return n;
}
int mg_base64_encode(const unsigned char *p, int n, char *to) {
int i, len = 0;
for (i = 0; i < n; i++) len = mg_base64_update(p[i], to, len);
len = mg_base64_final(to, len);
return len;
}
int mg_base64_decode(const char *src, int n, char *dst) {
const char *end = src + n;
int len = 0;
while (src + 3 < end) {
int a = mg_b64rev(src[0]), b = mg_b64rev(src[1]), c = mg_b64rev(src[2]),
d = mg_b64rev(src[3]);
if (a == 64 || a < 0 || b == 64 || b < 0 || c < 0 || d < 0) return 0;
dst[len++] = (a << 2) | (b >> 4);
if (src[2] != '=') {
dst[len++] = (b << 4) | (c >> 2);
if (src[3] != '=') dst[len++] = (c << 6) | d;
}
src += 4;
}
dst[len] = '\0';
return len;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/dns.c"
#endif
struct mg_dns_header {
uint16_t transaction_id;
uint16_t flags;
uint16_t num_questions;
uint16_t num_answers;
uint16_t num_authority_prs;
uint16_t num_other_prs;
};
struct dns_data {
struct dns_data *next;
struct mg_connection *c;
unsigned long expire;
uint16_t txnid;
};
static struct dns_data *s_reqs; // Active DNS requests
static void mg_sendnsreq(struct mg_connection *, struct mg_str *, int,
struct mg_dns *, bool);
static void mg_dns_free(struct dns_data *d) {
LIST_DELETE(struct dns_data, &s_reqs, d);
free(d);
}
void mg_resolve_cancel(struct mg_connection *c) {
struct dns_data *tmp, *d;
for (d = s_reqs; d != NULL; d = tmp) {
tmp = d->next;
if (d->c == c) mg_dns_free(d);
}
}
static size_t mg_dns_parse_name(const uint8_t *s, const uint8_t *e, size_t off,
char *to, size_t tolen, int depth) {
size_t i = 0, j = 0;
if (tolen > 0) to[0] = '\0';
if (depth > 5) return 0;
while (&s[off + i + 1] < e && s[off + i] > 0) {
size_t n = s[off + i];
if (n & 0xc0) {
size_t ptr = (((n & 0x3f) << 8) | s[off + i + 1]) - 12; // 12 is hdr len
if (&s[ptr + 1] < e && (s[ptr] & 0xc0) == 0) {
mg_dns_parse_name(s, e, ptr, to, tolen, depth + 1);
}
i++;
break;
}
if (&s[off + i + n + 1] >= e) break;
if (j + n + 1 >= tolen) return 0; // Error - overflow
if (j > 0) to[j++] = '.';
memcpy(&to[j], &s[off + i + 1], n);
j += n;
i += n + 1;
to[j] = '\0'; // Zero-terminate this chunk
// LOG(LL_DEBUG, ("-- %zu/%zu %zu %zu", i, e - s, j, n));
}
if (tolen > 0) to[tolen - 1] = '\0'; // Make sure make sure it is nul-term
return i;
}
// txid flags numQ numA numAP numOP
// 0000 00 01 81 80 00 01 00 01 00 00 00 00 07 63 65 73 .............ces
// 0010 61 6e 74 61 03 63 6f 6d 00 00 01 00 01 c0 0c 00 anta.com........
// 0020 01 00 01 00 00 02 57 00 04 94 fb 36 ec ......W....6.
bool mg_dns_parse(const uint8_t *buf, size_t len, struct mg_dns_message *dm) {
struct mg_dns_header *h = (struct mg_dns_header *) buf;
const uint8_t *s = buf + sizeof(*h), *e = &buf[len];
uint16_t atype, aclass;
size_t i, j = 0, n;
memset(dm, 0, sizeof(*dm));
if (len < sizeof(*h)) return 0; // Too small, headers dont fit
if (len > 512) return 0; // Too large, we don't expect that
if (mg_ntohs(h->num_questions) > 2) return 0; // Sanity
if (mg_ntohs(h->num_answers) > 5) return 0; // Sanity
dm->txnid = mg_ntohs(h->transaction_id);
{
// char *s = mg_hexdump(buf, len);
// LOG(LL_DEBUG, ("--\n%s\n--\n", s));
// free(s);
}
for (i = 0; i < mg_ntohs(h->num_questions); i++) {
j += mg_dns_parse_name(s, e, j, dm->name, sizeof(dm->name), 0) + 5;
// LOG(LL_INFO, ("QUE %zu %zu [%s]", i, j, dm->name));
}
for (i = 0; i < mg_ntohs(h->num_answers); i++) {
j += mg_dns_parse_name(s, e, j, dm->name, sizeof(dm->name), 0) + 9;
if (&s[j] + 2 > e) break;
atype = ((int) s[j - 8] << 8) | s[j - 7];
aclass = ((int) s[j - 6] << 8) | s[j - 5];
n = ((int) s[j] << 8) | s[j + 1];
LOG(LL_DEBUG, ("%s %d %hu %hu", dm->name, (int) n, atype, aclass));
if (&s[j] + 2 + n > e) break;
if (n == 4 && atype == 1 && aclass == 1) {
dm->addr.is_ip6 = false;
memcpy(&dm->addr.ip, &s[j + 2], n);
dm->resolved = true;
break; // Return success
} else if (n == 16 && atype == 28 && aclass == 1) {
dm->addr.is_ip6 = true;
memcpy(&dm->addr.ip6, &s[j + 2], n);
dm->resolved = true;
break; // Return success
}
j += 2 + n;
}
return true;
}
static void dns_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
struct dns_data *d, *tmp;
if (ev == MG_EV_POLL) {
unsigned long now = *(unsigned long *) ev_data;
for (d = (struct dns_data *) fn_data; d != NULL; d = tmp) {
tmp = d->next;
// LOG(LL_DEBUG, ("%lu %lu dns poll", d->expire, now));
if (now > d->expire) mg_error(d->c, "DNS timeout");
}
} else if (ev == MG_EV_READ) {
struct mg_dns_message dm;
int resolved = 0;
if (mg_dns_parse(c->recv.buf, c->recv.len, &dm) == false) {
char *s = mg_hexdump(c->recv.buf, c->recv.len);
LOG(LL_ERROR, ("Unexpected DNS response:\n%s\n", s));
free(s);
} else {
LOG(LL_DEBUG, ("%s %d", dm.name, dm.resolved));
for (d = s_reqs; d != NULL; d = tmp) {
tmp = d->next;
// LOG(LL_INFO, ("d %p %hu %hu", d, d->txnid, dm.txnid));
if (dm.txnid != d->txnid) continue;
if (d->c->is_resolving) {
d->c->is_resolving = 0;
if (dm.resolved) {
dm.addr.port = d->c->peer.port; // Save port
d->c->peer = dm.addr; // Copy resolved address
mg_connect_resolved(d->c);
#if MG_ENABLE_IPV6
} else if (dm.addr.is_ip6 == false && dm.name[0] != '\0') {
struct mg_str x = mg_str(dm.name);
mg_sendnsreq(d->c, &x, c->mgr->dnstimeout, &c->mgr->dns6, true);
#endif
} else {
mg_error(d->c, "%s DNS lookup failed", dm.name);
}
} else {
LOG(LL_ERROR, ("%lu already resolved", d->c->id));
}
mg_dns_free(d);
resolved = 1;
}
}
if (!resolved) LOG(LL_ERROR, ("stray DNS reply"));
c->recv.len = 0;
} else if (ev == MG_EV_CLOSE) {
for (d = s_reqs; d != NULL; d = tmp) {
tmp = d->next;
mg_dns_free(d);
}
}
}
void mg_dns_send(struct mg_connection *c, const struct mg_str *name,
uint16_t txnid, bool ipv6) {
struct {
struct mg_dns_header header;
uint8_t data[256];
} pkt;
size_t i, n;
memset(&pkt, 0, sizeof(pkt));
pkt.header.transaction_id = mg_htons(txnid);
pkt.header.flags = mg_htons(0x100);
pkt.header.num_questions = mg_htons(1);
for (i = n = 0; i < sizeof(pkt.data) - 5; i++) {
if (name->ptr[i] == '.' || i >= name->len) {
pkt.data[n] = (uint8_t)(i - n);
memcpy(&pkt.data[n + 1], name->ptr + n, i - n);
n = i + 1;
}
if (i >= name->len) break;
}
memcpy(&pkt.data[n], "\x00\x00\x01\x00\x01", 5); // A query
n += 5;
if (ipv6) pkt.data[n - 3] = 0x1c; // AAAA query
// memcpy(&pkt.data[n], "\xc0\x0c\x00\x1c\x00\x01", 6); // AAAA query
// n += 6;
mg_send(c, &pkt, sizeof(pkt.header) + n);
#if 0
// Immediately after A query, send AAAA query. Whatever reply comes first,
// we'll use it. Note: we cannot send two queries in a single packet.
// https://stackoverflow.com/questions/4082081/requesting-a-and-aaaa-records-in-single-dns-query
pkt.data[n - 3] = 0x1c; // AAAA query
mg_send(c, &pkt, sizeof(pkt.header) + n);
#endif
}
static void mg_sendnsreq(struct mg_connection *c, struct mg_str *name, int ms,
struct mg_dns *dnsc, bool ipv6) {
struct dns_data *d = NULL;
if (dnsc->url == NULL) {
mg_error(c, "DNS server URL is NULL. Call mg_mgr_init()");
} else if (dnsc->c == NULL) {
dnsc->c = mg_connect(c->mgr, dnsc->url, NULL, NULL);
if (dnsc->c != NULL) {
dnsc->c->pfn = dns_cb;
snprintf(dnsc->c->label, sizeof(dnsc->c->label), "%s", "DNS");
// dnsc->c->is_hexdumping = 1;
}
}
if (dnsc->c == NULL) {
mg_error(c, "resolver");
} else if ((d = (struct dns_data *) calloc(1, sizeof(*d))) == NULL) {
mg_error(c, "resolve OOM");
} else {
d->txnid = s_reqs ? s_reqs->txnid + 1 : 1;
d->next = s_reqs;
s_reqs = d;
d->expire = mg_millis() + ms;
d->c = c;
c->is_resolving = 1;
LOG(LL_DEBUG, ("%lu resolving %.*s, txnid %hu", c->id, (int) name->len,
name->ptr, d->txnid));
mg_dns_send(dnsc->c, name, d->txnid, ipv6);
}
}
void mg_resolve(struct mg_connection *c, struct mg_str *name, int ms) {
if (mg_aton(*name, &c->peer)) {
// name is an IP address, do not fire name resolution
mg_connect_resolved(c);
} else {
// name is not an IP, send DNS resolution request
mg_sendnsreq(c, name, ms, &c->mgr->dns4, false);
}
}
#ifdef MG_ENABLE_LINES
#line 1 "src/event.c"
#endif
void mg_call(struct mg_connection *c, int ev, void *ev_data) {
if (c->pfn != NULL) c->pfn(c, ev, ev_data, c->pfn_data);
if (c->fn != NULL) c->fn(c, ev, ev_data, c->fn_data);
}
void mg_error(struct mg_connection *c, const char *fmt, ...) {
char mem[256], *buf = mem;
va_list ap;
va_start(ap, fmt);
mg_vasprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
LOG(LL_ERROR, ("%lu %s", c->id, buf));
mg_call(c, MG_EV_ERROR, buf);
if (buf != mem) free(buf);
c->is_closing = 1;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/http.c"
#endif
struct http_data {
void *old_pfn_data; // Previous pfn_data
FILE *fp; // For static file serving
};
// Multipart POST example:
// https://gist.github.com/cpq/b8dd247571e6ee9c54ef7e8dfcfecf48
void mg_http_bauth(struct mg_connection *c, const char *user,
const char *pass) {
struct mg_str u = mg_str(user), p = mg_str(pass);
size_t need = c->send.len + 36 + (u.len + p.len) * 2;
if (c->send.size < need) mg_iobuf_resize(&c->send, need);
if (c->send.size >= need) {
size_t i, n = 0;
char *buf = (char *) &c->send.buf[c->send.len + 21];
memcpy(&buf[-21], "Authorization: Basic ", 21); // DON'T use mg_send!
for (i = 0; i < u.len; i++) n = mg_base64_update(u.ptr[i], buf, n);
if (p.len > 0) {
n = mg_base64_update(':', buf, n);
for (i = 0; i < p.len; i++) n = mg_base64_update(p.ptr[i], buf, n);
}
n = mg_base64_final(buf, n);
c->send.len += 21 + n + 2;
memcpy(&c->send.buf[c->send.len - 2], "\r\n", 2);
} else {
LOG(LL_ERROR, ("%lu %s cannot resize iobuf %d->%d ", c->id, c->label,
(int) c->send.size, (int) need));
}
}
int mg_http_get_var(const struct mg_str *buf, const char *name, char *dst,
int dst_len) {
const char *p, *e, *s;
size_t name_len;
int len;
if (dst == NULL || dst_len == 0) {
len = -2; // Bad destination
} else if (buf->ptr == NULL || name == NULL || buf->len == 0) {
len = -1; // Bad source
dst[0] = '\0';
} else {
name_len = strlen(name);
e = buf->ptr + buf->len;
len = -4; // Name does not exist
dst[0] = '\0';
for (p = buf->ptr; p + name_len < e; p++) {
if ((p == buf->ptr || p[-1] == '&') && p[name_len] == '=' &&
!mg_ncasecmp(name, p, name_len)) {
p += name_len + 1;
s = (const char *) memchr(p, '&', (size_t)(e - p));
if (s == NULL) s = e;
len = mg_url_decode(p, (size_t)(s - p), dst, dst_len, 1);
if (len == -1) len = -3; // Failed to decode
break;
}
}
}
return len;
}
int mg_url_decode(const char *src, size_t src_len, char *dst, size_t dst_len,
int is_form_url_encoded) {
size_t i, j;
for (i = j = 0; i < src_len && j + 1 < dst_len; i++, j++) {
if (src[i] == '%') {
// Use `i + 2 < src_len`, not `i < src_len - 2`, note small src_len
if (i + 2 < src_len && isxdigit(*(const unsigned char *) (src + i + 1)) &&
isxdigit(*(const unsigned char *) (src + i + 2))) {
mg_unhex(src + i + 1, 2, (uint8_t *) &dst[j]);
i += 2;
} else {
return -1;
}
} else if (is_form_url_encoded && src[i] == '+') {
dst[j] = ' ';
} else {
dst[j] = src[i];
}
}
if (j < dst_len) dst[j] = '\0'; // Null-terminate the destination
return i >= src_len ? (int) j : -1;
}
int mg_http_get_request_len(const unsigned char *buf, size_t buf_len) {
size_t i;
for (i = 0; i < buf_len; i++) {
if (!isprint(buf[i]) && buf[i] != '\r' && buf[i] != '\n' && buf[i] < 128)
return -1;
if ((i > 0 && buf[i] == '\n' && buf[i - 1] == '\n') ||
(i > 3 && buf[i] == '\n' && buf[i - 1] == '\r' && buf[i - 2] == '\n'))
return (int) i + 1;
}
return 0;
}
static const char *skip(const char *s, const char *end, const char *delims,
struct mg_str *v) {
v->ptr = s;
while (s < end && strchr(delims, *(unsigned char *) s) == NULL) s++;
v->len = s - v->ptr;
while (s < end && strchr(delims, *(unsigned char *) s) != NULL) s++;
return s;
}
struct mg_str *mg_http_get_header(struct mg_http_message *h, const char *name) {
size_t i, n = strlen(name), max = sizeof(h->headers) / sizeof(h->headers[0]);
for (i = 0; i < max && h->headers[i].name.len > 0; i++) {
struct mg_str *k = &h->headers[i].name, *v = &h->headers[i].value;
if (n == k->len && mg_ncasecmp(k->ptr, name, n) == 0) return v;
}
return NULL;
}
void mg_http_parse_headers(const char *s, const char *end,
struct mg_http_header *h, int max_headers) {
int i;
for (i = 0; i < max_headers; i++) {
struct mg_str k, v, tmp;
const char *he = skip(s, end, "\n", &tmp);
s = skip(s, he, ": \r\n", &k);
s = skip(s, he, "\r\n", &v);
if (k.len == tmp.len) continue;
while (v.len > 0 && v.ptr[v.len - 1] == ' ') v.len--; // Trim spaces
if (k.len == 0) break;
// LOG(LL_INFO, ("--HH [%.*s] [%.*s] [%.*s]", (int) tmp.len - 1, tmp.ptr,
//(int) k.len, k.ptr, (int) v.len, v.ptr));
h[i].name = k;
h[i].value = v;
}
}
int mg_http_parse(const char *s, size_t len, struct mg_http_message *hm) {
int is_response, req_len = mg_http_get_request_len((unsigned char *) s, len);
const char *end = s + req_len, *qs;
struct mg_str *cl;
memset(hm, 0, sizeof(*hm));
if (req_len <= 0) return req_len;
hm->message.ptr = s;
hm->body.ptr = s + req_len;
hm->message.len = hm->body.len = (size_t) ~0; // Set body length to infinite
// Parse request line
s = skip(s, end, " ", &hm->method);
s = skip(s, end, " ", &hm->uri);
s = skip(s, end, "\r\n", &hm->proto);
if (hm->uri.ptr <= hm->method.ptr || hm->proto.ptr <= hm->uri.ptr) return -1;
// If URI contains '?' character, setup query string
if ((qs = (const char *) memchr(hm->uri.ptr, '?', hm->uri.len)) != NULL) {
hm->query.ptr = qs + 1;
hm->query.len = &hm->uri.ptr[hm->uri.len] - (qs + 1);
hm->uri.len = qs - hm->uri.ptr;
}
mg_http_parse_headers(s, end, hm->headers,
sizeof(hm->headers) / sizeof(hm->headers[0]));
if ((cl = mg_http_get_header(hm, "Content-Length")) != NULL) {
hm->body.len = (size_t) mg_to64(*cl);
hm->message.len = req_len + hm->body.len;
}
// mg_http_parse() is used to parse both HTTP requests and HTTP
// responses. If HTTP response does not have Content-Length set, then
// body is read until socket is closed, i.e. body.len is infinite (~0).
//
// For HTTP requests though, according to
// http://tools.ietf.org/html/rfc7231#section-8.1.3,
// only POST and PUT methods have defined body semantics.
// Therefore, if Content-Length is not specified and methods are
// not one of PUT or POST, set body length to 0.
//
// So, if it is HTTP request, and Content-Length is not set,
// and method is not (PUT or POST) then reset body length to zero.
is_response = mg_ncasecmp(hm->method.ptr, "HTTP/", 5) == 0;
if (hm->body.len == (size_t) ~0 && !is_response &&
mg_vcasecmp(&hm->method, "PUT") != 0 &&
mg_vcasecmp(&hm->method, "POST") != 0) {
hm->body.len = 0;
hm->message.len = req_len;
}
return req_len;
}
static void mg_http_vprintf_chunk(struct mg_connection *c, const char *fmt,
va_list ap) {
char mem[256], *buf = mem;
int len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
mg_printf(c, "%X\r\n", len);
mg_send(c, buf, len);
mg_send(c, "\r\n", 2);
if (buf != mem) free(buf);
}
void mg_http_printf_chunk(struct mg_connection *c, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
mg_http_vprintf_chunk(c, fmt, ap);
va_end(ap);
}
void mg_http_write_chunk(struct mg_connection *c, const char *buf, size_t len) {
mg_printf(c, "%X\r\n", len);
mg_send(c, buf, len);
mg_send(c, "\r\n", 2);
}
void mg_http_reply(struct mg_connection *c, int code, const char *headers,
const char *fmt, ...) {
char mem[100], *buf = mem;
va_list ap;
int len;
va_start(ap, fmt);
len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
mg_printf(c, "HTTP/1.1 %d OK\r\n%sContent-Length: %d\r\n\r\n", code,
headers == NULL ? "" : headers, len);
mg_send(c, buf, len);
if (buf != mem) free(buf);
}
static void http_cb(struct mg_connection *, int, void *, void *);
static void restore_http_cb(struct mg_connection *c) {
struct http_data *d = (struct http_data *) c->pfn_data;
if (d->fp != NULL) fclose(d->fp);
c->pfn_data = d->old_pfn_data;
c->pfn = http_cb;
free(d);
}
#if MG_ENABLE_FS
char *mg_http_etag(char *buf, size_t len, struct stat *st) {
snprintf(buf, len, "\"%lx.%lu\"", (unsigned long) st->st_mtime,
(unsigned long) st->st_size);
return buf;
}
int mg_http_upload(struct mg_connection *c, struct mg_http_message *hm,
const char *dir) {
char offset[40] = "", name[200] = "", path[256];
mg_http_get_var(&hm->query, "offset", offset, sizeof(offset));
mg_http_get_var(&hm->query, "name", name, sizeof(name));
if (name[0] == '\0') {
mg_http_reply(c, 400, "", "%s", "name required");
return -1;
} else {
FILE *fp;
size_t oft = strtoul(offset, NULL, 0);
snprintf(path, sizeof(path), "%s%c%s", dir, MG_DIRSEP, name);
LOG(LL_DEBUG,
("%p %d bytes @ %d [%s]", c->fd, (int) hm->body.len, (int) oft, name));
if ((fp = fopen(path, oft == 0 ? "wb" : "a")) == NULL) {
mg_http_reply(c, 400, "", "fopen(%s): %d", name, errno);
return -2;
} else {
fwrite(hm->body.ptr, 1, hm->body.len, fp);
fclose(fp);
mg_http_reply(c, 200, "", "");
return hm->body.len;
}
}
}
static void static_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_WRITE || ev == MG_EV_POLL) {
struct http_data *d = (struct http_data *) fn_data;
// Read to send IO buffer directly, avoid extra on-stack buffer
size_t n, max = 2 * MG_IO_SIZE;
if (c->send.size < max) mg_iobuf_resize(&c->send, max);
if (c->send.len >= c->send.size) return; // Rate limit
n = fread(c->send.buf + c->send.len, 1, c->send.size - c->send.len, d->fp);
if (n > 0) c->send.len += n;
if (c->send.len < c->send.size) restore_http_cb(c);
} else if (ev == MG_EV_CLOSE) {
restore_http_cb(c);
}
(void) ev_data;
}
static const char *guess_content_type(const char *filename) {
size_t n = strlen(filename);
#define MIME_ENTRY(_ext, _type) \
{ _ext, sizeof(_ext) - 1, _type }
const struct {
const char *ext;
size_t ext_len;
const char *type;
} * t, types[] = {
MIME_ENTRY("html", "text/html"),
MIME_ENTRY("htm", "text/html"),
MIME_ENTRY("shtml", "text/html"),
MIME_ENTRY("css", "text/css"),
MIME_ENTRY("js", "text/javascript"),
MIME_ENTRY("mjs", "text/javascript"),
MIME_ENTRY("json", "application/json"),
MIME_ENTRY("ico", "image/x-icon"),
MIME_ENTRY("gif", "image/gif"),
MIME_ENTRY("jpg", "image/jpeg"),
MIME_ENTRY("jpeg", "image/jpeg"),
MIME_ENTRY("png", "image/png"),
MIME_ENTRY("svg", "image/svg+xml"),
MIME_ENTRY("txt", "text/plain"),
MIME_ENTRY("wav", "audio/wav"),
MIME_ENTRY("mp3", "audio/mpeg"),
MIME_ENTRY("mid", "audio/mid"),
MIME_ENTRY("ogg", "application/ogg"),
MIME_ENTRY("xml", "application/xml"),
MIME_ENTRY("ttf", "font/ttf"),
MIME_ENTRY("json", "application/json"),
MIME_ENTRY("xsl", "application/xml"),
MIME_ENTRY("doc", "application/msword"),
MIME_ENTRY("exe", "application/octet-stream"),
MIME_ENTRY("zip", "application/zip"),
MIME_ENTRY("xls", "application/excel"),
MIME_ENTRY("tgz", "application/tar-gz"),
MIME_ENTRY("tar", "application/tar"),
MIME_ENTRY("gz", "application/gzip"),
MIME_ENTRY("rar", "application/rar"),
MIME_ENTRY("rtf", "application/rtf"),
MIME_ENTRY("pdf", "application/pdf"),
MIME_ENTRY("mpg", "video/mpeg"),
MIME_ENTRY("webm", "video/webm"),
MIME_ENTRY("mpeg", "video/mpeg"),
MIME_ENTRY("mov", "video/quicktime"),
MIME_ENTRY("mp4", "video/mp4"),
MIME_ENTRY("avi", "video/x-msvideo"),
MIME_ENTRY("csv", "text/csv"),
MIME_ENTRY("bmp", "image/bmp"),
MIME_ENTRY("bin", "application/octet-stream"),
MIME_ENTRY("wasm", "application/wasm"),
{NULL, 0, NULL},
};
for (t = types; t->ext != NULL; t++) {
if (n < t->ext_len + 2) continue;
if (mg_ncasecmp(t->ext, &filename[n - t->ext_len], t->ext_len)) continue;
return t->type;
}
return "text/plain";
}
void mg_http_serve_file(struct mg_connection *c, struct mg_http_message *hm,
const char *path, const char *mime) {
struct mg_str *inm = mg_http_get_header(hm, "If-None-Match");
struct stat st;
FILE *fp = fopen(path, "rb");
char etag[64];
if (fp == NULL || stat(path, &st) != 0 ||
mg_http_etag(etag, sizeof(etag), &st) != etag) {
mg_http_reply(c, 404, "", "%s", "Not found\n");
} else if (inm != NULL && mg_vcasecmp(inm, etag) == 0) {
mg_printf(c, "HTTP/1.1 304 Not Modified\r\nContent-Length: 0\r\n\r\n");
} else {
mg_printf(c,
"HTTP/1.1 200 OK\r\nContent-Type: %s\r\n"
"Etag: %s\r\nContent-Length: %lu\r\n\r\n",
mime, etag, (unsigned long) st.st_size);
if (mg_vcasecmp(&hm->method, "HEAD") == 0) {
fclose(fp);
} else {
struct http_data *d = (struct http_data *) calloc(1, sizeof(*d));
d->fp = fp;
d->old_pfn_data = c->pfn_data;
c->pfn = static_cb;
c->pfn_data = d;
}
}
}
#if MG_ARCH == MG_ARCH_ESP32 || MG_ARCH == MG_ARCH_ESP8266 || \
MG_ARCH == MG_ARCH_FREERTOS
char *realpath(const char *src, char *dst) {
int len = strlen(src);
if (len > PATH_MAX - 1) len = PATH_MAX - 1;
strncpy(dst, src, len);
dst[len] = '\0';
return dst;
}
#endif
// Try to avoid dirent API
static int mg_is_dir(const char *path) {
#if MG_ARCH == MG_ARCH_FREERTOS
struct FF_STAT st;
return (ff_stat(path, &st) == 0) && (st.st_mode & FF_IFDIR);
#else
struct stat st;
return (stat(path, &st) == 0) && (st.st_mode & S_IFDIR);
#endif
}
#if MG_ENABLE_DIRECTORY_LISTING
#ifdef _WIN32
struct dirent {
char d_name[MAX_PATH];
};
typedef struct win32_dir {
HANDLE handle;
WIN32_FIND_DATAW info;
struct dirent result;
} DIR;
int gettimeofday(struct timeval *tv, void *tz) {
FILETIME ft;
unsigned __int64 tmpres = 0;
static int tzflag = 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);
}
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 = malloc(sizeof(*d))) == NULL) {
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
} else {
to_wchar(name, wpath, sizeof(wpath) / sizeof(wpath[0]));
attrs = GetFileAttributesW(wpath);
if (attrs != 0Xffffffff && (attrs & FILE_ATTRIBUTE_DIRECTORY)) {
(void) wcscat(wpath, L"\\*");
d->handle = FindFirstFileW(wpath, &d->info);
d->result.d_name[0] = '\0';
} else {
free(d);
d = NULL;
}
}
return d;
}
int closedir(DIR *d) {
int result = 0;
if (d != NULL) {
if (d->handle != INVALID_HANDLE_VALUE)
result = FindClose(d->handle) ? 0 : -1;
free(d);
} else {
result = -1;
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
struct dirent *readdir(DIR *d) {
struct dirent *result = NULL;
if (d != NULL) {
memset(&d->result, 0, sizeof(d->result));
if (d->handle != INVALID_HANDLE_VALUE) {
result = &d->result;
WideCharToMultiByte(CP_UTF8, 0, d->info.cFileName, -1, result->d_name,
sizeof(result->d_name), NULL, NULL);
if (!FindNextFileW(d->handle, &d->info)) {
FindClose(d->handle);
d->handle = INVALID_HANDLE_VALUE;
}
} else {
SetLastError(ERROR_FILE_NOT_FOUND);
}
} else {
SetLastError(ERROR_BAD_ARGUMENTS);
}
return result;
}
#endif
static void printdirentry(struct mg_connection *c, struct mg_http_message *hm,
const char *name, struct stat *stp) {
char size[64], mod[64]; //, path[PATH_MAX];
int is_dir = S_ISDIR(stp->st_mode);
const char *slash = is_dir ? "/" : "";
if (is_dir) {
snprintf(size, sizeof(size), "%s", "[DIR]");
} else {
if (stp->st_size < 1024) {
snprintf(size, sizeof(size), "%d", (int) stp->st_size);
} else if (stp->st_size < 0x100000) {
snprintf(size, sizeof(size), "%.1fk", (double) stp->st_size / 1024.0);
} else if (stp->st_size < 0x40000000) {
snprintf(size, sizeof(size), "%.1fM", (double) stp->st_size / 1048576);
} else {
snprintf(size, sizeof(size), "%.1fG", (double) stp->st_size / 1073741824);
}
}
strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&stp->st_mtime));
// mg_escape(file_name, path, sizeof(path));
// href = mg_url_encode(mg_mk_str(file_name));
mg_http_printf_chunk(
c,
"<tr><td><a href=\"%.*s%s%s\">%s%s</a></td><td>%s</td><td>%s</td></tr>",
(int) hm->uri.len, hm->uri.ptr, name, slash, name, slash, mod, size);
// free((void *) href.p);
}
static void listdir(struct mg_connection *c, struct mg_http_message *hm,
char *dir) {
char path[PATH_MAX + 1], *p = &dir[strlen(dir) - 1];
struct dirent *dp;
DIR *dirp;
while (p > dir && *p != '/') *p-- = '\0';
if ((dirp = (opendir(dir))) != NULL) {
mg_printf(c, "%s\r\n", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n");
mg_http_printf_chunk(
c,
"<!DOCTYPE html><html><head><title>Index of %.*s</title>"
"<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>Name</th><th>Modified</th><th>Size</th></tr>"
"<tr><td colspan=\"3\"><hr></td></tr></thead><tbody>",
(int) hm->uri.len, hm->uri.ptr, (int) hm->uri.len, hm->uri.ptr);
while ((dp = readdir(dirp)) != NULL) {
struct stat st;
// Do not show current dir and hidden files
if (!strcmp(dp->d_name, ".") || !strcmp(dp->d_name, "..")) continue;
snprintf(path, sizeof(path), "%s/%s", dir, dp->d_name);
if (stat(path, &st) != 0) {
LOG(LL_ERROR, ("%lu stat(%s): %d", c->id, path, errno));
continue;
}
printdirentry(c, hm, dp->d_name, &st);
}
closedir(dirp);
mg_http_printf_chunk(
c,
"</tbody><tfoot><tr><td colspan=\"3\"><hr></td></tr></tfoot>"
"</table><address>Mongoose v.%s</address></body></html>",
MG_VERSION);
mg_http_write_chunk(c, "", 0);
} else {
mg_http_reply(c, 400, "", "Cannot open dir");
LOG(LL_DEBUG, ("%lu opendir(%s) -> %d", c->id, dir, errno));
}
}
#endif
void mg_http_serve_dir(struct mg_connection *c, struct mg_http_message *hm,
const char *dir) {
char path[PATH_MAX + 2], root[sizeof(path) - 2], real[sizeof(path) - 2];
path[0] = root[0] = real[0] = '\0';
if (realpath(dir, root) == NULL)
LOG(LL_DEBUG, ("realpath(%s): %d", dir, errno));
if (!mg_is_dir(root)) {
mg_http_reply(c, 400, "", "Bad web root [%s]\n", root);
} else {
// NOTE(lsm): Xilinx snprintf does not 0-terminate the detination for
// the %.*s specifier, if the length is zero. Make sure hm->uri.len > 0
bool is_index = false;
size_t n = snprintf(path, sizeof(path), "%s%.*s", root, (int) hm->uri.len,
hm->uri.ptr);
while (n > 0 && n < sizeof(path) && path[n - 1] == '/') path[--n] = 0;
if (realpath(path, real) == NULL)
LOG(LL_DEBUG, ("realpath(%s): %d", path, errno));
// LOG(LL_INFO, ("[%s] [%s] [%s] [%s]", dir, root, path, real));
if (mg_is_dir(real)) {
strncat(real, "/index.html", sizeof(real) - strlen(real) - 1);
is_index = true;
}
if (strlen(real) < strlen(root) || memcmp(real, root, strlen(root)) != 0) {
mg_http_reply(c, 404, "", "Not found %.*s\n", hm->uri.len, hm->uri.ptr);
} else {
FILE *fp = fopen(real, "r");
#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
snprintf(c->label, sizeof(c->label) - 1, "<-F %s", real);
#endif
if (is_index && fp == NULL) {
#if MG_ENABLE_DIRECTORY_LISTING
listdir(c, hm, real);
#else
mg_http_reply(c, 403, "", "%s", "Directory listing not supported");
#endif
} else {
mg_http_serve_file(c, hm, real, guess_content_type(real));
}
if (fp != NULL) fclose(fp);
}
}
}
#endif
void mg_http_creds(struct mg_http_message *hm, char *user, int userlen,
char *pass, int passlen) {
struct mg_str *v = mg_http_get_header(hm, "Authorization");
user[0] = pass[0] = '\0';
if (v != NULL && v->len > 6 && memcmp(v->ptr, "Basic ", 6) == 0) {
char buf[256];
int n = mg_base64_decode(v->ptr + 6, (int) v->len - 6, buf);
const char *p = (const char *) memchr(buf, ':', n);
if (p != NULL) {
snprintf(user, userlen, "%.*s", (int) (p - buf), buf);
snprintf(pass, passlen, "%.*s", n - (int) (p - buf) - 1, p + 1);
}
} else if (v != NULL && v->len > 7 && memcmp(v->ptr, "Bearer ", 7) == 0) {
snprintf(pass, passlen, "%.*s", (int) v->len - 7, v->ptr + 7);
} else if ((v = mg_http_get_header(hm, "Cookie")) != NULL) {
size_t i;
for (i = 0; i < v->len - 13; i++) {
if (memcmp(&v->ptr[i], "access_token=", 13) == 0) {
const char *p2 = v->ptr + i + 13, *p3 = p2;
while (p2 < &v->ptr[v->len] && p2[0] != ';' && p2[0] != ' ') p2++;
snprintf(pass, passlen, "%.*s", (int) (p2 - p3), p3);
break;
}
}
} else {
mg_http_get_var(&hm->query, "access_token", pass, passlen);
}
}
bool mg_http_match_uri(const struct mg_http_message *hm, const char *glob) {
return mg_globmatch(glob, strlen(glob), hm->uri.ptr, hm->uri.len);
}
static void http_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_READ || ev == MG_EV_CLOSE) {
struct mg_http_message hm;
for (;;) {
int n = mg_http_parse((char *) c->recv.buf, c->recv.len, &hm);
if (ev == MG_EV_CLOSE) {
hm.message.len = c->recv.len;
hm.body.len = hm.message.len - (hm.body.ptr - hm.message.ptr);
}
if (n < 0 && ev == MG_EV_READ) {
LOG(LL_ERROR, ("%lu HTTP parse error", c->id));
c->is_closing = 1;
break;
} else if (n > 0 && (size_t) c->recv.len >= hm.message.len) {
#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
snprintf(c->label, sizeof(c->label) - 1, "<-[%.*s]", (int) hm.uri.len,
hm.uri.ptr);
if (mg_http_match_uri(&hm, "/debug/info")) {
struct mg_mgr *mgr = (struct mg_mgr *) fn_data;
struct mg_connection *x;
mg_printf(c, "%s\r\n",
"HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n");
for (x = mgr->conns; x != NULL; x = x->next) {
// LOG(LL_INFO, ("%p %s", x->fd, x->label));
mg_http_printf_chunk(
c,
"%-4p %-12s %04d.%04d/%04d.%04d"
" %d%d%d%d%d%d%d%d%d%d%d%d%d%d\n",
x->fd, x->label, x->recv.len, x->recv.size, x->send.len,
x->send.size, c->is_listening, c->is_client, c->is_accepted,
c->is_resolving, c->is_connecting, c->is_tls, c->is_tls_hs,
c->is_udp, c->is_websocket, c->is_hexdumping, c->is_draining,
c->is_closing, c->is_readable, c->is_writable);
}
mg_http_write_chunk(c, "", 0);
mg_iobuf_delete(&c->recv, hm.message.len);
continue;
}
#endif
mg_call(c, MG_EV_HTTP_MSG, &hm);
mg_iobuf_delete(&c->recv, hm.message.len);
} else {
break;
}
}
}
(void) fn_data;
(void) ev_data;
}
struct mg_connection *mg_http_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = http_cb, c->pfn_data = mgr;
#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
snprintf(c->label, sizeof(c->label) - 1, "->%s", url);
#endif
return c;
}
struct mg_connection *mg_http_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = http_cb, c->pfn_data = mgr;
#if MG_ENABLE_HTTP_DEBUG_ENDPOINT
if (c != NULL) snprintf(c->label, sizeof(c->label) - 1, "<-LSN");
#endif
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/iobuf.c"
#endif
#include <string.h>
void mg_iobuf_resize(struct mg_iobuf *io, size_t new_size) {
if (new_size == 0) {
free(io->buf);
io->buf = NULL;
io->len = io->size = 0;
} else if (new_size != io->size) {
// NOTE(lsm): do not use realloc here. Use malloc/free only, to ease the
// porting to some obscure platforms like FreeRTOS
void *p = malloc(new_size);
if (p != NULL) {
memcpy(p, io->buf, io->size < new_size ? io->size : new_size);
free(io->buf);
io->buf = (unsigned char *) p;
io->size = new_size;
} else {
LOG(LL_ERROR,
("%lu->%lu", (unsigned long) io->size, (unsigned long) new_size));
}
}
}
void mg_iobuf_init(struct mg_iobuf *io, size_t size) {
io->buf = NULL;
io->len = io->size = 0;
if (size > 0) mg_iobuf_resize(io, size);
}
size_t mg_iobuf_append(struct mg_iobuf *io, const void *buf, size_t len,
size_t chunk_size) {
size_t new_size = io->len + len + chunk_size;
new_size -= new_size % chunk_size;
if (new_size != io->size) mg_iobuf_resize(io, new_size);
if (new_size != io->size) len = 0; // Realloc failure, append nothing
if (buf != NULL) memmove(io->buf + io->len, buf, len);
io->len += len;
return len;
}
size_t mg_iobuf_delete(struct mg_iobuf *io, size_t len) {
if (len > io->len) len = 0;
memmove(io->buf, io->buf + len, io->len - len);
io->len -= len;
return len;
}
void mg_iobuf_free(struct mg_iobuf *io) {
free(io->buf);
mg_iobuf_init(io, 0);
}
#ifdef MG_ENABLE_LINES
#line 1 "src/log.c"
#endif
#if MG_ENABLE_MGOS
#else
#if MG_ENABLE_LOG
static void mg_log_stdout(const void *buf, int len, void *userdata) {
(void) userdata;
fwrite(buf, 1, len, stdout);
}
static const char *s_spec = "2";
static void (*s_fn)(const void *, int, void *) = mg_log_stdout;
static void *s_fn_param = NULL;
void mg_log_set(const char *spec) {
LOG(LL_INFO, ("Setting log level to %s", spec));
s_spec = spec;
}
bool mg_log_prefix(int level, const char *file, int line, const char *fname) {
// static unsigned long seq;
int max = LL_INFO;
struct mg_str k, v, s = mg_str(s_spec);
const char *p = strrchr(file, '/');
p = p == NULL ? file : p + 1;
if (s_fn == NULL) return false;
while (mg_next_comma_entry(&s, &k, &v)) {
if (v.len == 0) max = atoi(k.ptr);
if (v.len > 0 && strncmp(p, k.ptr, k.len) == 0) max = atoi(v.ptr);
}
if (level <= max) {
char timebuf[21], buf[50] = "";
time_t t = time(NULL);
struct tm *tm = gmtime(&t);
int n, tag;
strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S", tm);
tag = level == LL_ERROR ? 'E' : level == LL_INFO ? 'I' : ' ';
n = snprintf(buf, sizeof(buf), "%s %c %s:%d:%s", timebuf, tag, p, line,
fname);
if (n < 0 || n > (int) sizeof(buf) - 2) n = sizeof(buf) - 2;
while (n < (int) sizeof(buf) - 1) buf[n++] = ' ';
s_fn(buf, sizeof(buf) - 1, s_fn_param);
return true;
} else {
return false;
}
}
void mg_log(const char *fmt, ...) {
char mem[256], *buf = mem;
va_list ap;
int len = 0;
va_start(ap, fmt);
len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
va_end(ap);
s_fn(buf, len, s_fn_param);
s_fn("\n", 1, s_fn_param);
if (buf != mem) free(buf);
}
void mg_log_set_callback(void (*fn)(const void *, int, void *), void *param) {
s_fn = fn;
s_fn_param = param;
}
#endif
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/lwip.c"
#endif
#if MG_ENABLE_LWIP
#include <lwip/tcp.h>
#include <lwip/udp.h>
static void tcp_error_cb(void *arg, err_t err) {
struct mg_connection *c = (struct mg_connection *) arg;
mg_error(c, "%p err %ld", c->fd, err);
}
static err_t connect_cb(void *arg, struct tcp_pcb *pcb, err_t err) {
struct mg_connection *c = (struct mg_connection *) arg;
LOG(LL_DEBUG, ("err %ld, arg %p, pcb %p", err, arg, pcb));
c->is_connecting = 0;
if (err != ERR_OK) mg_error(c, "%p err %d", c->fd, err);
return err;
}
static err_t tcp_recv_cb(void *arg, struct tcp_pcb *pcb, struct pbuf *p,
err_t err) {
struct mg_connection *c = (struct mg_connection *) arg;
LOG(LL_DEBUG,
("err %ld, pbuf %p/%d, io.len %d, io.size %d", err, p,
p == NULL ? 0 : (int) p->len, (int) c->recv.len, (int) c->recv.size));
if (err == ERR_OK && p != NULL) {
#if 0
if (s->io.size < s->io.len + p->len) {
char *buf = realloc(s->io.buf, s->io.len + p->len);
if (buf != NULL) {
s->io.buf = buf;
s->io.size = s->io.len + p->len;
} else {
return ERR_MEM;
}
}
// MLOG(LL_DEBUG, " --> cpy, %p %p", s->io.buf, p->payload);
memcpy(s->io.buf + s->io.len, p->payload, p->len);
s->io.len += p->len;
#endif
tcp_recved(pcb, p->len);
pbuf_free(p);
return err;
} else {
// rmsock(s);
return ERR_ABRT;
}
}
static void udp_recv_cb(void *arg, struct udp_pcb *pcb, struct pbuf *p,
const ip_addr_t *addr, uint16_t port) {
LOG(LL_DEBUG,
("%p %p pbuf %p/%d port %hu", arg, pcb, p, p == NULL ? 0 : p->len, port));
}
static err_t tcp_sent_cb(void *arg, struct tcp_pcb *pcb, uint16_t len) {
LOG(LL_DEBUG, ("%p %d", pcb, (int) len));
return ERR_OK;
}
#if 0
static int ll_write(struct mg_connection *c, const void *buf, int len,
int *fail) {
int n = c->is_tls ? mg_tls_send(c, buf, len, fail)
: mg_sock_send(c, buf, len, fail);
LOG(*fail ? LL_ERROR : LL_VERBOSE_DEBUG,
("%p %c%c%c %d/%d %d", c->fd, c->is_tls ? 'T' : 't',
c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len,
MG_SOCK_ERRNO));
if (n > 0 && c->is_hexdumping) mg_hexdump(c, "->", buf, n);
return n;
}
#endif
int mg_send(struct mg_connection *c, const void *buf, size_t len) {
if (c->is_udp) {
struct udp_pcb *pcb = (struct udp_pcb *) c->fd;
struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
if (p != NULL) {
// p->payload = (void *) buf;
memcpy(p->payload, buf, len);
err_t err = udp_send(pcb, p);
pbuf_free(p);
LOG(LL_DEBUG,
("%lu UDP %d bytes -> %x:%hu, err %ld", c->id, (int) len,
(unsigned) *(uint32_t *) &pcb->remote_ip, pcb->remote_port, err));
if (err != ERR_OK) mg_error(c, "%p err %d", c->fd, err);
} else {
mg_error(c, "%p pbuf OOM", c->fd);
}
} else if (c->is_connecting) {
mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE);
} else {
}
#if 0
int fail, n = c->is_udp
? ll_write(c, buf, (SOCKET) len, &fail)
: mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE);
return n;
#endif
return 0;
}
static struct mg_connection *mg_mkconn(const char *url) {
struct mg_connection *c = (struct mg_connection *) calloc(1, sizeof(*c));
typedef void *(*new_t)(void);
int is_udp = strncmp(url, "udp:", 4) == 0;
if (c == NULL) {
LOG(LL_ERROR, ("%s %s", url, "OOM"));
} else if ((c->fd = (is_udp ? (new_t) udp_new : (new_t) tcp_new)()) == NULL) {
LOG(LL_ERROR, ("%s new", url));
free(c);
c = NULL;
} else {
c->is_udp = is_udp;
}
return c;
}
struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_mkconn(url);
struct mg_str host = mg_url_host(url);
if (c == NULL) return c;
c->next = mgr->conns;
mgr->conns = c;
// mg_set_non_blocking_mode((SOCKET) c->fd);
c->is_client = 1;
c->peer.port = mg_htons(mg_url_port(url));
c->fn = fn;
c->fn_data = fn_data;
c->is_hexdumping = 1;
if (c->is_udp) {
udp_bind(c->fd, IP_ADDR_ANY, 0);
udp_recv(c->fd, udp_recv_cb, c);
} else {
tcp_arg(c->fd, c);
tcp_err(c->fd, tcp_error_cb);
tcp_sent(c->fd, tcp_sent_cb);
tcp_recv(c->fd, tcp_recv_cb);
tcp_bind(c->fd, IP_ADDR_ANY, 0);
tcp_nagle_disable((struct tcp_pcb *) c->fd);
}
LOG(LL_DEBUG, ("%lu -> %s %s", c->id, url, c->is_udp ? "UDP" : "TCP"));
mg_resolve(mgr, c, &host, mgr->dnstimeout);
return c;
}
void mg_connect_resolved(struct mg_connection *c) {
char buf[40];
ip_addr_t ipaddr;
memcpy(&ipaddr, &c->peer.ip, sizeof(ipaddr));
mg_call(c, MG_EV_RESOLVE, NULL);
LOG(LL_DEBUG, ("%lu resolved to %s", c->id, mg_straddr(c, buf, sizeof(buf))));
err_t err = c->is_udp ? udp_connect((struct udp_pcb *) c->fd, &ipaddr,
mg_ntohs(c->peer.port))
: tcp_connect((struct tcp_pcb *) c->fd, &ipaddr,
mg_ntohs(c->peer.port), connect_cb);
if (c->is_udp) c->is_connecting = 0;
if (err != ERR_OK) mg_error(c, "%p failed, err %d", c->fd, err);
}
static err_t accept_cb(void *arg, struct tcp_pcb *pcb, err_t e) {
LOG(LL_DEBUG, ("%p err %ld, pcb %p", arg, e, pcb));
return ERR_OK;
}
struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_mkconn(url);
struct mg_str host = mg_url_host(url);
uint16_t port = mg_url_port(url);
uint32_t ipaddr;
err_t err;
if (c == NULL) return c;
mg_aton(host.ptr, &ipaddr);
if (!mg_vcasecmp(&host, "localhost")) ipaddr = mg_htonl(0x7f000001);
if ((err = tcp_bind(c->fd, (ip_addr_t *) &ipaddr, port)) != ERR_OK) {
mg_error(c, "%p tcp_bind(%x:%hu) -> %ld", c->fd, ipaddr, port, err);
} else {
tcp_listen(c->fd);
tcp_accept(c->fd, accept_cb);
}
return c;
}
void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
LOG(LL_DEBUG, ("%p %d", mgr, ms));
mg_usleep(200 * 1000);
mg_timer_poll(mg_millis());
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/md5.c"
#endif
#include <string.h>
#if MG_ENABLE_MD5
#if !defined(BYTE_ORDER) && defined(__BYTE_ORDER)
#define BYTE_ORDER __BYTE_ORDER
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN __LITTLE_ENDIAN
#endif /* LITTLE_ENDIAN */
#ifndef BIG_ENDIAN
#define BIG_ENDIAN __LITTLE_ENDIAN
#endif /* BIG_ENDIAN */
#endif /* BYTE_ORDER */
static void mg_byte_reverse(unsigned char *buf, unsigned longs) {
/* Forrest: MD5 expect LITTLE_ENDIAN, swap if BIG_ENDIAN */
#if BYTE_ORDER == BIG_ENDIAN
do {
uint32_t t = (uint32_t)((unsigned) buf[3] << 8 | buf[2]) << 16 |
((unsigned) buf[1] << 8 | buf[0]);
*(uint32_t *) buf = t;
buf += 4;
} while (--longs);
#else
(void) buf;
(void) longs;
#endif
}
#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))
#define MD5STEP(f, w, x, y, z, data, s) \
(w += f(x, y, z) + data, w = w << s | w >> (32 - s), w += x)
/*
* Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
* initialization constants.
*/
void mg_md5_init(mg_md5_ctx *ctx) {
ctx->buf[0] = 0x67452301;
ctx->buf[1] = 0xefcdab89;
ctx->buf[2] = 0x98badcfe;
ctx->buf[3] = 0x10325476;
ctx->bits[0] = 0;
ctx->bits[1] = 0;
}
static void mg_md5_transform(uint32_t buf[4], uint32_t const in[16]) {
register uint32_t a, b, c, d;
a = buf[0];
b = buf[1];
c = buf[2];
d = buf[3];
MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
buf[0] += a;
buf[1] += b;
buf[2] += c;
buf[3] += d;
}
void mg_md5_update(mg_md5_ctx *ctx, const unsigned char *buf, size_t len) {
uint32_t t;
t = ctx->bits[0];
if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t) ctx->bits[1]++;
ctx->bits[1] += (uint32_t) len >> 29;
t = (t >> 3) & 0x3f;
if (t) {
unsigned char *p = (unsigned char *) ctx->in + t;
t = 64 - t;
if (len < t) {
memcpy(p, buf, len);
return;
}
memcpy(p, buf, t);
mg_byte_reverse(ctx->in, 16);
mg_md5_transform(ctx->buf, (uint32_t *) ctx->in);
buf += t;
len -= t;
}
while (len >= 64) {
memcpy(ctx->in, buf, 64);
mg_byte_reverse(ctx->in, 16);
mg_md5_transform(ctx->buf, (uint32_t *) ctx->in);
buf += 64;
len -= 64;
}
memcpy(ctx->in, buf, len);
}
void mg_md5_final(mg_md5_ctx *ctx, unsigned char digest[16]) {
unsigned count;
unsigned char *p;
uint32_t *a;
count = (ctx->bits[0] >> 3) & 0x3F;
p = ctx->in + count;
*p++ = 0x80;
count = 64 - 1 - count;
if (count < 8) {
memset(p, 0, count);
mg_byte_reverse(ctx->in, 16);
mg_md5_transform(ctx->buf, (uint32_t *) ctx->in);
memset(ctx->in, 0, 56);
} else {
memset(p, 0, count - 8);
}
mg_byte_reverse(ctx->in, 14);
a = (uint32_t *) ctx->in;
a[14] = ctx->bits[0];
a[15] = ctx->bits[1];
mg_md5_transform(ctx->buf, (uint32_t *) ctx->in);
mg_byte_reverse((unsigned char *) ctx->buf, 4);
memcpy(digest, ctx->buf, 16);
memset((char *) ctx, 0, sizeof(*ctx));
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/mqtt.c"
#endif
#define MQTT_CLEAN_SESSION 0x02
#define MQTT_HAS_WILL 0x04
#define MQTT_WILL_RETAIN 0x20
#define MQTT_HAS_PASSWORD 0x40
#define MQTT_HAS_USER_NAME 0x80
#define MQTT_GET_WILL_QOS(flags) (((flags) &0x18) >> 3)
#define MQTT_SET_WILL_QOS(flags, qos) (flags) = ((flags) & ~0x18) | ((qos) << 3)
enum { MQTT_OK, MQTT_INCOMPLETE, MQTT_MALFORMED };
void mg_mqtt_send_header(struct mg_connection *c, uint8_t cmd, uint8_t flags,
uint32_t len) {
uint8_t buf[1 + sizeof(len)], *vlen = &buf[1];
buf[0] = (cmd << 4) | flags;
do {
*vlen = len % 0x80;
len /= 0x80;
if (len > 0) *vlen |= 0x80;
vlen++;
} while (len > 0 && vlen < &buf[sizeof(buf)]);
mg_send(c, buf, vlen - buf);
}
static void mg_send_u16(struct mg_connection *c, uint16_t value) {
mg_send(c, &value, sizeof(value));
}
static void mqtt_login(struct mg_connection *c, const char *url,
struct mg_mqtt_opts *opts) {
uint32_t total_len = 7 + 1 + 2 + 2;
uint16_t flags = (opts->qos & 3) << 3;
struct mg_str user = mg_url_user(url);
struct mg_str pass = mg_url_pass(url);
if (user.len > 0) {
total_len += 2 + (uint32_t) user.len;
flags |= MQTT_HAS_USER_NAME;
}
if (pass.len > 0) {
total_len += 2 + (uint32_t) pass.len;
flags |= MQTT_HAS_PASSWORD;
}
if (opts->will_topic.len > 0 && opts->will_message.len > 0) {
total_len +=
4 + (uint32_t) opts->will_topic.len + (uint32_t) opts->will_message.len;
flags |= MQTT_HAS_WILL;
}
if (opts->clean || opts->client_id.len == 0) flags |= MQTT_CLEAN_SESSION;
if (opts->will_retain) flags |= MQTT_WILL_RETAIN;
total_len += (uint32_t) opts->client_id.len;
mg_mqtt_send_header(c, MQTT_CMD_CONNECT, 0, total_len);
mg_send(c, "\00\04MQTT\04", 7);
mg_send(c, &flags, 1);
// keepalive == 0 means "do not disconnect us!"
mg_send_u16(c, mg_htons((uint16_t) opts->keepalive));
mg_send_u16(c, mg_htons((uint16_t) opts->client_id.len));
mg_send(c, opts->client_id.ptr, opts->client_id.len);
if (flags & MQTT_HAS_WILL) {
mg_send_u16(c, mg_htons((uint16_t) opts->will_topic.len));
mg_send(c, opts->will_topic.ptr, opts->will_topic.len);
mg_send_u16(c, mg_htons((uint16_t) opts->will_message.len));
mg_send(c, opts->will_message.ptr, opts->will_message.len);
}
if (user.len > 0) {
mg_send_u16(c, mg_htons((uint16_t) user.len));
mg_send(c, user.ptr, user.len);
}
if (pass.len > 0) {
mg_send_u16(c, mg_htons((uint16_t) pass.len));
mg_send(c, pass.ptr, pass.len);
}
}
void mg_mqtt_pub(struct mg_connection *c, struct mg_str *topic,
struct mg_str *data) {
uint8_t flags = MQTT_QOS(1);
uint32_t total_len = 2 + (uint32_t) topic->len + (uint32_t) data->len;
LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) topic->len,
(char *) topic->ptr, (int) data->len, (char *) data->ptr));
if (MQTT_GET_QOS(flags) > 0) total_len += 2;
mg_mqtt_send_header(c, MQTT_CMD_PUBLISH, flags, total_len);
mg_send_u16(c, mg_htons((uint16_t) topic->len));
mg_send(c, topic->ptr, topic->len);
if (MQTT_GET_QOS(flags) > 0) {
static uint16_t s_id;
if (++s_id == 0) s_id++;
mg_send_u16(c, mg_htons(s_id));
}
mg_send(c, data->ptr, data->len);
}
void mg_mqtt_sub(struct mg_connection *c, struct mg_str *topic) {
static uint16_t s_id;
uint8_t qos = 1;
uint32_t total_len = 2 + (uint32_t) topic->len + 2 + 1;
mg_mqtt_send_header(c, MQTT_CMD_SUBSCRIBE, (uint8_t) MQTT_QOS(qos),
total_len);
if (++s_id == 0) ++s_id;
mg_send_u16(c, mg_htons(s_id));
mg_send_u16(c, mg_htons((uint16_t) topic->len));
mg_send(c, topic->ptr, topic->len);
mg_send(c, &qos, sizeof(qos));
}
int mg_mqtt_parse(const uint8_t *buf, size_t len, struct mg_mqtt_message *m) {
uint8_t lc = 0, *p, *end;
uint32_t n = 0, len_len = 0;
memset(m, 0, sizeof(*m));
m->dgram.ptr = (char *) buf;
if (len < 2) return MQTT_INCOMPLETE;
m->cmd = buf[0] >> 4;
m->qos = (buf[0] >> 1) & 3;
n = len_len = 0;
p = (uint8_t *) buf + 1;
while ((size_t)(p - buf) < len) {
lc = *((uint8_t *) p++);
n += (lc & 0x7f) << 7 * len_len;
len_len++;
if (!(lc & 0x80)) break;
if (len_len >= 4) return MQTT_MALFORMED;
}
end = p + n;
if (lc & 0x80 || end > buf + len) return MQTT_INCOMPLETE;
m->dgram.len = end - buf;
switch (m->cmd) {
case MQTT_CMD_CONNACK:
if (end - p < 2) return MQTT_MALFORMED;
m->ack = p[1];
break;
case MQTT_CMD_PUBACK:
case MQTT_CMD_PUBREC:
case MQTT_CMD_PUBREL:
case MQTT_CMD_PUBCOMP:
case MQTT_CMD_SUBACK:
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (p[0] << 8) | p[1];
break;
case MQTT_CMD_SUBSCRIBE: {
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (p[0] << 8) | p[1];
p += 2;
break;
}
case MQTT_CMD_PUBLISH: {
if (p + 2 > end) return MQTT_MALFORMED;
m->topic.len = (p[0] << 8) | p[1];
m->topic.ptr = (char *) p + 2;
p += 2 + m->topic.len;
if (p > end) return MQTT_MALFORMED;
if (m->qos > 0) {
if (p + 2 > end) return MQTT_MALFORMED;
m->id = (p[0] << 8) | p[1];
p += 2;
}
if (p > end) return MQTT_MALFORMED;
m->data.ptr = (char *) p;
m->data.len = end - p;
break;
}
default:
break;
}
return MQTT_OK;
}
int mg_mqtt_next_sub(struct mg_mqtt_message *msg, struct mg_str *topic,
uint8_t *qos, int pos) {
unsigned char *buf = (unsigned char *) msg->dgram.ptr + pos;
int new_pos;
if ((size_t) pos >= msg->dgram.len) return -1;
topic->len = buf[0] << 8 | buf[1];
topic->ptr = (char *) buf + 2;
new_pos = pos + 2 + topic->len + 1;
if ((size_t) new_pos > msg->dgram.len) return -1;
*qos = buf[2 + topic->len];
return new_pos;
}
static void mqtt_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
if (ev == MG_EV_READ) {
for (;;) {
struct mg_mqtt_message mm;
int rc = mg_mqtt_parse(c->recv.buf, c->recv.len, &mm);
if (rc == MQTT_MALFORMED) {
LOG(LL_ERROR, ("%lu MQTT malformed message", c->id));
c->is_closing = 1;
break;
} else if (rc == MQTT_OK) {
LOG(LL_VERBOSE_DEBUG,
("%p MQTT CMD %d len %d [%.*s]", c->fd, mm.cmd, (int) mm.dgram.len,
(int) mm.data.len, mm.data.ptr));
switch (mm.cmd) {
case MQTT_CMD_CONNACK:
mg_call(c, MG_EV_MQTT_OPEN, &mm.ack);
if (mm.ack == 0) {
LOG(LL_INFO, ("%lu Connected", c->id));
} else {
LOG(LL_ERROR, ("%lu MQTT auth failed, code %d", c->id, mm.ack));
c->is_closing = 1;
}
break;
case MQTT_CMD_PUBLISH: {
LOG(LL_DEBUG, ("%lu [%.*s] -> [%.*s]", c->id, (int) mm.topic.len,
mm.topic.ptr, (int) mm.data.len, mm.data.ptr));
mg_call(c, MG_EV_MQTT_MSG, &mm);
break;
}
}
mg_call(c, MG_EV_MQTT_CMD, &mm);
mg_iobuf_delete(&c->recv, mm.dgram.len);
} else {
break;
}
}
}
(void) ev_data;
(void) fn_data;
}
struct mg_connection *mg_mqtt_connect(struct mg_mgr *mgr, const char *url,
struct mg_mqtt_opts *opts,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
if (c != NULL) {
struct mg_mqtt_opts empty;
memset(&empty, 0, sizeof(empty));
mqtt_login(c, url, opts == NULL ? &empty : opts);
c->pfn = mqtt_cb;
}
return c;
}
struct mg_connection *mg_mqtt_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = mg_listen(mgr, url, fn, fn_data);
if (c != NULL) c->pfn = mqtt_cb, c->pfn_data = mgr;
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/net.c"
#endif
int mg_vprintf(struct mg_connection *c, const char *fmt, va_list ap) {
char mem[256], *buf = mem;
int len = mg_vasprintf(&buf, sizeof(mem), fmt, ap);
len = mg_send(c, buf, len);
if (buf != mem) free(buf);
return len;
}
int mg_printf(struct mg_connection *c, const char *fmt, ...) {
int len = 0;
va_list ap;
va_start(ap, fmt);
len = mg_vprintf(c, fmt, ap);
va_end(ap);
return len;
}
char *mg_straddr(struct mg_connection *c, char *buf, size_t len) {
if (c->peer.is_ip6) {
uint16_t *p = (uint16_t *) c->peer.ip6;
snprintf(buf, len, "[%x:%x:%x:%x:%x:%x:%x:%x]:%hu", 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]),
mg_ntohs(c->peer.port));
} else {
unsigned char *p = (unsigned char *) &c->peer.ip;
snprintf(buf, len, "%d.%d.%d.%d:%hu", p[0], p[1], p[2], p[3],
mg_ntohs(c->peer.port));
}
return buf;
}
char *mg_ntoa(const struct mg_addr *addr, char *buf, size_t len) {
uint8_t p[4];
memcpy(p, &addr->ip, sizeof(p));
snprintf(buf, len, "%hhu.%hhu.%hhu.%hhu", p[0], p[1], p[2], p[3]);
return buf;
}
static bool mg_atonl(struct mg_str str, struct mg_addr *addr) {
if (mg_vcasecmp(&str, "localhost") != 0) return false;
addr->ip = mg_htonl(0x7f000001);
addr->is_ip6 = false;
return true;
}
static bool mg_aton4(struct mg_str str, struct mg_addr *addr) {
uint8_t data[4] = {0, 0, 0, 0};
size_t i, num_dots = 0;
for (i = 0; i < str.len; i++) {
if (str.ptr[i] >= '0' && str.ptr[i] <= '9') {
int octet = data[num_dots] * 10 + (str.ptr[i] - '0');
if (octet > 255) return false;
data[num_dots] = octet;
} else if (str.ptr[i] == '.') {
if (num_dots >= 3 || i == 0 || str.ptr[i - 1] == '.') return false;
num_dots++;
} else {
return false;
}
}
if (num_dots != 3 || str.ptr[i - 1] == '.') return false;
memcpy(&addr->ip, data, sizeof(data));
addr->is_ip6 = false;
return true;
}
static bool mg_aton6(struct mg_str str, struct mg_addr *addr) {
size_t i, j = 0, n = 0, dc = 42;
for (i = 0; i < str.len; i++) {
if ((str.ptr[i] >= '0' && str.ptr[i] <= '9') ||
(str.ptr[i] >= 'a' && str.ptr[i] <= 'f') ||
(str.ptr[i] >= 'A' && str.ptr[i] <= 'F')) {
unsigned long val;
if (i > j + 3) return false;
// LOG(LL_DEBUG, ("%zu %zu [%.*s]", i, j, (int) (i - j + 1),
// &str.ptr[j]));
val = mg_unhexn(&str.ptr[j], i - j + 1);
addr->ip6[n] = (uint8_t)((val >> 8) & 255);
addr->ip6[n + 1] = (uint8_t)(val & 255);
} else if (str.ptr[i] == ':') {
j = i + 1;
if (i > 0 && str.ptr[i - 1] == ':') {
dc = n; // Double colon
if (i > 1 && str.ptr[i - 2] == ':') return false;
} else if (i > 0) {
n += 2;
}
if (n > 14) return false;
addr->ip6[n] = addr->ip6[n + 1] = 0; // For trailing ::
} else {
return false;
}
}
if (n < 14 && dc == 42) return false;
if (n < 14) {
memmove(&addr->ip6[dc + (14 - n)], &addr->ip6[dc], n - dc + 2);
memset(&addr->ip6[dc], 0, 14 - n);
}
addr->is_ip6 = true;
return true;
}
bool mg_aton(struct mg_str str, struct mg_addr *addr) {
// LOG(LL_INFO, ("[%.*s]", (int) str.len, str.ptr));
return mg_atonl(str, addr) || mg_aton4(str, addr) || mg_aton6(str, addr);
}
void mg_mgr_free(struct mg_mgr *mgr) {
struct mg_connection *c;
for (c = mgr->conns; c != NULL; c = c->next) c->is_closing = 1;
mg_mgr_poll(mgr, 0);
#if MG_ARCH == MG_ARCH_FREERTOS
FreeRTOS_DeleteSocketSet(mgr->ss);
#endif
LOG(LL_INFO, ("All connections closed"));
}
void mg_mgr_init(struct mg_mgr *mgr) {
#ifdef _WIN32
WSADATA data;
WSAStartup(MAKEWORD(2, 2), &data);
#elif MG_ARCH == MG_ARCH_FREERTOS
mgr->ss = FreeRTOS_CreateSocketSet();
#elif defined(__unix) || defined(__unix__) || defined(__APPLE__)
// Ignore SIGPIPE signal, so if client cancels the request, it
// won't kill the whole process.
signal(SIGPIPE, SIG_IGN);
#endif
memset(mgr, 0, sizeof(*mgr));
mgr->dnstimeout = 3000;
mgr->dns4.url = "udp://8.8.8.8:53";
mgr->dns6.url = "udp://[2001:4860:4860::8888]:53";
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sha1.c"
#endif
/* Copyright(c) By Steve Reid <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);
void mg_sha1_transform(uint32_t state[5], const unsigned char buffer[64]) {
uint32_t a, b, c, d, e;
union char64long16 block[1];
memcpy(block, buffer, 64);
a = state[0];
b = state[1];
c = state[2];
d = state[3];
e = state[4];
R0(a, b, c, d, e, 0);
R0(e, a, b, c, d, 1);
R0(d, e, a, b, c, 2);
R0(c, d, e, a, b, 3);
R0(b, c, d, e, a, 4);
R0(a, b, c, d, e, 5);
R0(e, a, b, c, d, 6);
R0(d, e, a, b, c, 7);
R0(c, d, e, a, b, 8);
R0(b, c, d, e, a, 9);
R0(a, b, c, d, e, 10);
R0(e, a, b, c, d, 11);
R0(d, e, a, b, c, 12);
R0(c, d, e, a, b, 13);
R0(b, c, d, e, a, 14);
R0(a, b, c, d, e, 15);
R1(e, a, b, c, d, 16);
R1(d, e, a, b, c, 17);
R1(c, d, e, a, b, 18);
R1(b, c, d, e, a, 19);
R2(a, b, c, d, e, 20);
R2(e, a, b, c, d, 21);
R2(d, e, a, b, c, 22);
R2(c, d, e, a, b, 23);
R2(b, c, d, e, a, 24);
R2(a, b, c, d, e, 25);
R2(e, a, b, c, d, 26);
R2(d, e, a, b, c, 27);
R2(c, d, e, a, b, 28);
R2(b, c, d, e, a, 29);
R2(a, b, c, d, e, 30);
R2(e, a, b, c, d, 31);
R2(d, e, a, b, c, 32);
R2(c, d, e, a, b, 33);
R2(b, c, d, e, a, 34);
R2(a, b, c, d, e, 35);
R2(e, a, b, c, d, 36);
R2(d, e, a, b, c, 37);
R2(c, d, e, a, b, 38);
R2(b, c, d, e, a, 39);
R3(a, b, c, d, e, 40);
R3(e, a, b, c, d, 41);
R3(d, e, a, b, c, 42);
R3(c, d, e, a, b, 43);
R3(b, c, d, e, a, 44);
R3(a, b, c, d, e, 45);
R3(e, a, b, c, d, 46);
R3(d, e, a, b, c, 47);
R3(c, d, e, a, b, 48);
R3(b, c, d, e, a, 49);
R3(a, b, c, d, e, 50);
R3(e, a, b, c, d, 51);
R3(d, e, a, b, c, 52);
R3(c, d, e, a, b, 53);
R3(b, c, d, e, a, 54);
R3(a, b, c, d, e, 55);
R3(e, a, b, c, d, 56);
R3(d, e, a, b, c, 57);
R3(c, d, e, a, b, 58);
R3(b, c, d, e, a, 59);
R4(a, b, c, d, e, 60);
R4(e, a, b, c, d, 61);
R4(d, e, a, b, c, 62);
R4(c, d, e, a, b, 63);
R4(b, c, d, e, a, 64);
R4(a, b, c, d, e, 65);
R4(e, a, b, c, d, 66);
R4(d, e, a, b, c, 67);
R4(c, d, e, a, b, 68);
R4(b, c, d, e, a, 69);
R4(a, b, c, d, e, 70);
R4(e, a, b, c, d, 71);
R4(d, e, a, b, c, 72);
R4(c, d, e, a, b, 73);
R4(b, c, d, e, a, 74);
R4(a, b, c, d, e, 75);
R4(e, a, b, c, d, 76);
R4(d, e, a, b, c, 77);
R4(c, d, e, a, b, 78);
R4(b, c, d, e, a, 79);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
state[4] += e;
/* Erase working structures. The order of operations is important,
* used to ensure that compiler doesn't optimize those out. */
memset(block, 0, sizeof(block));
a = b = c = d = e = 0;
(void) a;
(void) b;
(void) c;
(void) d;
(void) e;
}
void mg_sha1_init(mg_sha1_ctx *context) {
context->state[0] = 0x67452301;
context->state[1] = 0xEFCDAB89;
context->state[2] = 0x98BADCFE;
context->state[3] = 0x10325476;
context->state[4] = 0xC3D2E1F0;
context->count[0] = context->count[1] = 0;
}
void mg_sha1_update(mg_sha1_ctx *context, const unsigned char *data,
size_t len) {
size_t i, j;
j = context->count[0];
if ((context->count[0] += (uint32_t) len << 3) < j) context->count[1]++;
context->count[1] += (uint32_t)(len >> 29);
j = (j >> 3) & 63;
if ((j + len) > 63) {
memcpy(&context->buffer[j], data, (i = 64 - j));
mg_sha1_transform(context->state, context->buffer);
for (; i + 63 < len; i += 64) {
mg_sha1_transform(context->state, &data[i]);
}
j = 0;
} else
i = 0;
memcpy(&context->buffer[j], &data[i], len - i);
}
void mg_sha1_final(unsigned char digest[20], mg_sha1_ctx *context) {
unsigned i;
unsigned char finalcount[8], c;
for (i = 0; i < 8; i++) {
finalcount[i] = (unsigned char) ((context->count[(i >= 4 ? 0 : 1)] >>
((3 - (i & 3)) * 8)) &
255);
}
c = 0200;
mg_sha1_update(context, &c, 1);
while ((context->count[0] & 504) != 448) {
c = 0000;
mg_sha1_update(context, &c, 1);
}
mg_sha1_update(context, finalcount, 8);
for (i = 0; i < 20; i++) {
digest[i] =
(unsigned char) ((context->state[i >> 2] >> ((3 - (i & 3)) * 8)) & 255);
}
memset(context, '\0', sizeof(*context));
memset(&finalcount, '\0', sizeof(finalcount));
}
void mg_hmac_sha1(const unsigned char *key, size_t keylen,
const unsigned char *data, size_t datalen,
unsigned char out[20]) {
mg_sha1_ctx ctx;
unsigned char buf1[64], buf2[64], tmp_key[20], i;
if (keylen > sizeof(buf1)) {
mg_sha1_init(&ctx);
mg_sha1_update(&ctx, key, keylen);
mg_sha1_final(tmp_key, &ctx);
key = tmp_key;
keylen = sizeof(tmp_key);
}
memset(buf1, 0, sizeof(buf1));
memset(buf2, 0, sizeof(buf2));
memcpy(buf1, key, keylen);
memcpy(buf2, key, keylen);
for (i = 0; i < sizeof(buf1); i++) {
buf1[i] ^= 0x36;
buf2[i] ^= 0x5c;
}
mg_sha1_init(&ctx);
mg_sha1_update(&ctx, buf1, sizeof(buf1));
mg_sha1_update(&ctx, data, datalen);
mg_sha1_final(out, &ctx);
mg_sha1_init(&ctx);
mg_sha1_update(&ctx, buf2, sizeof(buf2));
mg_sha1_update(&ctx, out, 20);
mg_sha1_final(out, &ctx);
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sntp.c"
#endif
#define SNTP_INTERVAL_SEC (3600)
#define SNTP_TIME_OFFSET 2208988800
static unsigned long s_sntmp_next;
int mg_sntp_parse(const unsigned char *buf, size_t len, struct timeval *tv) {
int mode = len > 0 ? buf[0] & 7 : 0, res = -1;
if (len < 48) {
LOG(LL_ERROR, ("%s", "corrupt packet"));
} else if ((buf[0] & 0x38) >> 3 != 4) {
LOG(LL_ERROR, ("%s", "wrong version"));
} else if (mode != 4 && mode != 5) {
LOG(LL_ERROR, ("%s", "not a server reply"));
} else if (buf[1] == 0) {
LOG(LL_ERROR, ("%s", "server sent a kiss of death"));
} else {
uint32_t *data = (uint32_t *) &buf[40];
tv->tv_sec = mg_ntohl(data[0]) - SNTP_TIME_OFFSET;
tv->tv_usec = mg_ntohl(data[1]);
s_sntmp_next = tv->tv_sec + SNTP_INTERVAL_SEC;
res = 0;
}
return res;
}
static void sntp_cb(struct mg_connection *c, int ev, void *evd, void *fnd) {
if (ev == MG_EV_READ) {
struct timeval tv = {0, 0};
if (mg_sntp_parse(c->recv.buf, c->recv.len, &tv) == 0) {
mg_call(c, MG_EV_SNTP_TIME, &tv);
LOG(LL_DEBUG, ("%u.%u, next at %lu", (unsigned) tv.tv_sec,
(unsigned) tv.tv_usec, s_sntmp_next));
}
c->recv.len = 0; // Clear receive buffer
} else if (ev == MG_EV_RESOLVE) {
mg_sntp_send(c, time(NULL));
} else if (ev == MG_EV_CLOSE) {
// mg_fn_del(c, sntp_cb);
}
(void) fnd;
(void) evd;
}
void mg_sntp_send(struct mg_connection *c, unsigned long utc) {
if (c->is_resolving) {
LOG(LL_ERROR, ("%lu wait until resolved", c->id));
} else if (utc > s_sntmp_next) {
uint8_t buf[48] = {0};
s_sntmp_next = utc + SNTP_INTERVAL_SEC;
buf[0] = (3 << 6) | (4 << 3) | 3;
mg_send(c, buf, sizeof(buf));
LOG(LL_DEBUG,
("%p request sent, ct %lu, next at %lu", c->fd, utc, s_sntmp_next));
}
}
struct mg_connection *mg_sntp_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fnd) {
struct mg_connection *c = NULL;
if (url == NULL) url = "udp://time.google.com:123";
if ((c = mg_connect(mgr, url, fn, fnd)) != NULL) c->pfn = sntp_cb;
return c;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/sock.c"
#endif
#if MG_ENABLE_SOCKET
#if defined(_WIN32)
#define MG_SOCK_ERRNO WSAGetLastError()
#define FD(C_) ((SOCKET)(C_)->fd)
#elif MG_ARCH == MG_ARCH_FREERTOS
#define MG_SOCK_ERRNO errno
typedef Socket_t SOCKET;
#define FD(C_) ((long) (C_)->fd)
#define INVALID_SOCKET FREERTOS_INVALID_SOCKET
#else
#define MG_SOCK_ERRNO errno
#define closesocket(x) close(x)
#define INVALID_SOCKET (-1)
typedef int SOCKET;
#define FD(C_) ((SOCKET)(long) (C_)->fd)
#endif
#ifndef MSG_NONBLOCKING
#define MSG_NONBLOCKING 0
#endif
union usa {
struct sockaddr sa;
struct sockaddr_in sin;
#if MG_ENABLE_IPV6
struct sockaddr_in6 sin6;
#endif
};
static union usa tousa(struct mg_addr *a) {
union usa usa;
memset(&usa, 0, sizeof(usa));
usa.sin.sin_family = AF_INET;
usa.sin.sin_port = a->port;
*(uint32_t *) &usa.sin.sin_addr = a->ip;
#if MG_ENABLE_IPV6
if (a->is_ip6) {
usa.sin.sin_family = AF_INET6;
usa.sin6.sin6_port = a->port;
memcpy(&usa.sin6.sin6_addr, a->ip6, sizeof(a->ip6));
}
#endif
return usa;
}
static int mg_sock_failed(void) {
int err = MG_SOCK_ERRNO;
return err != EINPROGRESS && err != EWOULDBLOCK
#ifndef WINCE
&& err != EAGAIN && err != EINTR
#endif
#ifdef _WIN32
&& err != WSAEINTR && err != WSAEWOULDBLOCK
#endif
;
}
static struct mg_connection *alloc_conn(struct mg_mgr *mgr, int is_client,
SOCKET fd) {
struct mg_connection *c = (struct mg_connection *) calloc(1, sizeof(*c));
if (c != NULL) {
c->is_client = is_client;
c->fd = (void *) (long) fd;
c->mgr = mgr;
c->id = ++mgr->nextid;
}
return c;
}
static int mg_sock_recv(struct mg_connection *c, void *buf, int len,
int *fail) {
int n = 0;
if (c->is_udp) {
union usa usa;
socklen_t slen = sizeof(usa.sin);
#if MG_ENABLE_IPV6
if (c->peer.is_ip6) slen = sizeof(usa.sin6);
#endif
n = recvfrom(FD(c), buf, len, 0, &usa.sa, &slen);
if (n > 0) {
if (c->peer.is_ip6) {
#if MG_ENABLE_IPV6
memcpy(c->peer.ip6, &usa.sin6.sin6_addr, sizeof(c->peer.ip6));
c->peer.port = usa.sin6.sin6_port;
#endif
} else {
c->peer.ip = *(uint32_t *) &usa.sin.sin_addr;
c->peer.port = usa.sin.sin_port;
}
}
} else {
n = recv(FD(c), buf, len, MSG_NONBLOCKING);
}
*fail = (n == 0) || (n < 0 && mg_sock_failed());
return n;
}
static int mg_sock_send(struct mg_connection *c, const void *buf, int len,
int *fail) {
int n = 0;
if (c->is_udp) {
union usa usa = tousa(&c->peer);
socklen_t slen = sizeof(usa.sin);
#if MG_ENABLE_IPV6
if (c->peer.is_ip6) slen = sizeof(usa.sin6);
#endif
n = sendto(FD(c), buf, len, 0, &usa.sa, slen);
} else {
n = send(FD(c), buf, len, MSG_NONBLOCKING);
}
*fail = (n == 0) || (n < 0 && mg_sock_failed());
return n;
}
static int ll_read(struct mg_connection *c, void *buf, int len, int *fail) {
int n = c->is_tls ? mg_tls_recv(c, buf, len, fail)
: mg_sock_recv(c, buf, len, fail);
LOG(*fail ? LL_DEBUG : LL_VERBOSE_DEBUG,
("%lu %c%c%c %d/%d %d %d", c->id, c->is_tls ? 'T' : 't',
c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len,
MG_SOCK_ERRNO, *fail));
if (n > 0 && c->is_hexdumping) {
char *s = mg_hexdump(buf, n);
LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "<-", n, s));
free(s);
}
return n;
}
static int ll_write(struct mg_connection *c, const void *buf, int len,
int *fail) {
int n = c->is_tls ? mg_tls_send(c, buf, len, fail)
: mg_sock_send(c, buf, len, fail);
LOG(*fail ? LL_ERROR : LL_VERBOSE_DEBUG,
("%lu %c%c%c %d/%d %d", c->id, c->is_tls ? 'T' : 't',
c->is_udp ? 'U' : 'u', c->is_connecting ? 'C' : 'c', n, len,
MG_SOCK_ERRNO));
if (n > 0 && c->is_hexdumping) {
char *s = mg_hexdump(buf, len);
LOG(LL_INFO, ("\n-- %lu %s %s %d\n%s--", c->id, c->label, "->", len, s));
free(s);
}
return n;
}
int mg_send(struct mg_connection *c, const void *buf, size_t len) {
int fail, n = c->is_udp
? ll_write(c, buf, (SOCKET) len, &fail)
: (int) mg_iobuf_append(&c->send, buf, len, MG_IO_SIZE);
return n;
}
static void mg_set_non_blocking_mode(SOCKET fd) {
#ifdef _WIN32
unsigned long on = 1;
ioctlsocket(fd, FIONBIO, &on);
#elif MG_ARCH == MG_ARCH_FREERTOS
const BaseType_t off = 0;
setsockopt(fd, 0, FREERTOS_SO_RCVTIMEO, &off, sizeof(off));
setsockopt(fd, 0, FREERTOS_SO_SNDTIMEO, &off, sizeof(off));
#else
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL, 0) | O_NONBLOCK);
#endif
}
SOCKET mg_open_listener(const char *url) {
struct mg_addr addr;
SOCKET fd = INVALID_SOCKET;
memset(&addr, 0, sizeof(addr));
addr.port = mg_htons(mg_url_port(url));
if (!mg_aton(mg_url_host(url), &addr)) {
LOG(LL_ERROR, ("invalid listening URL: %s", url));
} else {
union usa usa = tousa(&addr);
int on = 1, af = AF_INET;
int type = strncmp(url, "udp:", 4) == 0 ? SOCK_DGRAM : SOCK_STREAM;
int proto = type == SOCK_DGRAM ? IPPROTO_UDP : IPPROTO_TCP;
socklen_t slen = sizeof(usa.sin);
#if MG_ENABLE_IPV6
if (addr.is_ip6) af = AF_INET6, slen = sizeof(usa.sin6);
#endif
if ((fd = socket(af, type, proto)) != INVALID_SOCKET &&
#if !defined(_WIN32) || !defined(SO_EXCLUSIVEADDRUSE)
// SO_RESUSEADDR is not enabled on Windows because the semantics of
// SO_REUSEADDR on UNIX and Windows is different. On Windows,
// SO_REUSEADDR allows to bind a socket to a port without error even if
// the port is already open by another program. This is not the behavior
// SO_REUSEADDR was designed for, and leads to hard-to-track failure
// scenarios. Therefore, SO_REUSEADDR was disabled on Windows unless
// SO_EXCLUSIVEADDRUSE is supported and set on a socket.
!setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
#endif
#if defined(_WIN32) && defined(SO_EXCLUSIVEADDRUSE) && !defined(WINCE)
// "Using SO_REUSEADDR and SO_EXCLUSIVEADDRUSE"
!setsockopt(fd, SOL_SOCKET, SO_EXCLUSIVEADDRUSE, (void *) &on,
sizeof(on)) &&
#endif
bind(fd, &usa.sa, slen) == 0 &&
// NOTE(lsm): FreeRTOS uses backlog value as a connection limit
(type == SOCK_DGRAM || listen(fd, 128) == 0)) {
mg_set_non_blocking_mode(fd);
} else if (fd >= 0) {
LOG(LL_ERROR, ("Failed to listen on %s, errno %d", url, MG_SOCK_ERRNO));
closesocket(fd);
fd = INVALID_SOCKET;
}
}
return fd;
}
static void read_conn(struct mg_connection *c,
int (*fn)(struct mg_connection *, void *, int, int *)) {
unsigned char *buf;
int rc, len, fail;
// NOTE(lsm): do only one iteration of reads, cause some systems
// (e.g. FreeRTOS stack) return 0 instead of -1/EWOULDBLOCK when no data
if (c->recv.size - c->recv.len < MG_IO_SIZE &&
c->recv.size < MG_MAX_RECV_BUF_SIZE) {
mg_iobuf_resize(&c->recv, c->recv.size + MG_IO_SIZE);
}
buf = c->recv.buf + c->recv.len;
len = (int) (c->recv.size - c->recv.len);
rc = fn(c, buf, len, &fail);
if (rc > 0) {
struct mg_str evd = mg_str_n((char *) buf, rc);
c->recv.len += rc;
mg_call(c, MG_EV_READ, &evd);
} else {
if (fail) c->is_closing = 1;
}
}
static int write_conn(struct mg_connection *c) {
int fail, rc = ll_write(c, c->send.buf, (SOCKET) c->send.len, &fail);
if (rc > 0) {
mg_iobuf_delete(&c->send, rc);
if (c->send.len == 0) mg_iobuf_resize(&c->send, 0);
mg_call(c, MG_EV_WRITE, &rc);
} else if (fail) {
c->is_closing = 1;
}
return rc;
}
static void close_conn(struct mg_connection *c) {
// Unlink this connection from the list
LIST_DELETE(struct mg_connection, &c->mgr->conns, c);
mg_resolve_cancel(c);
if (c == c->mgr->dns4.c) c->mgr->dns4.c = NULL;
if (c == c->mgr->dns6.c) c->mgr->dns6.c = NULL;
mg_call(c, MG_EV_CLOSE, NULL);
// while (c->callbacks != NULL) mg_fn_del(c, c->callbacks->fn);
LOG(LL_DEBUG, ("%lu closed", c->id));
if (FD(c) != INVALID_SOCKET) {
closesocket(FD(c));
#if MG_ARCH == MG_ARCH_FREERTOS
FreeRTOS_FD_CLR(c->fd, c->mgr->ss, eSELECT_ALL);
#endif
}
mg_tls_free(c);
free(c->recv.buf);
free(c->send.buf);
memset(c, 0, sizeof(*c));
free(c);
}
static void setsockopts(struct mg_connection *c) {
#if MG_ARCH == MG_ARCH_FREERTOS
FreeRTOS_FD_SET(c->fd, c->mgr->ss, eSELECT_READ | eSELECT_EXCEPT);
#else
int on = 1, cnt = 3, intvl = 20;
#if !defined(SOL_TCP)
#define SOL_TCP IPPROTO_TCP
#endif
setsockopt(FD(c), SOL_TCP, TCP_NODELAY, (void *) &on, sizeof(on));
#if defined(TCP_QUICKACK)
setsockopt(FD(c), SOL_TCP, TCP_QUICKACK, (void *) &on, sizeof(on));
#endif
setsockopt(FD(c), SOL_SOCKET, SO_KEEPALIVE, (void *) &on, sizeof(on));
#if ESP32 || ESP8266 || defined(__linux__)
int idle = 60;
setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPIDLE, &idle, sizeof(idle));
#endif
#ifndef _WIN32
setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPCNT, &cnt, sizeof(cnt));
setsockopt(FD(c), IPPROTO_TCP, TCP_KEEPINTVL, &intvl, sizeof(intvl));
#endif
#endif
}
void mg_connect_resolved(struct mg_connection *c) {
char buf[40];
int type = c->is_udp ? SOCK_DGRAM : SOCK_STREAM;
int af = AF_INET;
#if MG_ENABLE_IPV6
if (c->peer.is_ip6) af = AF_INET6;
#endif
mg_straddr(c, buf, sizeof(buf));
c->fd = (void *) (long) socket(af, type, 0);
LOG(LL_DEBUG, ("%lu resolved, sock %p -> %s", c->id, c->fd, buf));
if (FD(c) == INVALID_SOCKET) {
mg_error(c, "socket(): %d", MG_SOCK_ERRNO);
return;
}
mg_set_non_blocking_mode(FD(c));
mg_call(c, MG_EV_RESOLVE, NULL);
if (type == SOCK_STREAM) {
union usa usa = tousa(&c->peer);
socklen_t slen =
#if MG_ENABLE_IPV6
c->peer.is_ip6 ? sizeof(usa.sin6) :
#endif
sizeof(usa.sin);
int rc = connect(FD(c), &usa.sa, slen);
int fail = rc < 0 && mg_sock_failed() ? MG_SOCK_ERRNO : 0;
if (fail) {
mg_error(c, "connect: %d", MG_SOCK_ERRNO);
} else {
setsockopts(c);
}
if (rc < 0) c->is_connecting = 1;
}
}
struct mg_connection *mg_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = NULL;
if ((c = alloc_conn(mgr, 1, INVALID_SOCKET)) == NULL) {
LOG(LL_ERROR, ("OOM"));
} else {
struct mg_str host = mg_url_host(url);
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->is_udp = (strncmp(url, "udp:", 4) == 0);
c->peer.port = mg_htons(mg_url_port(url));
c->fn = fn;
c->fn_data = fn_data;
LOG(LL_DEBUG, ("%lu -> %s", c->id, url));
mg_resolve(c, &host, mgr->dnstimeout);
}
return c;
}
static void accept_conn(struct mg_mgr *mgr, struct mg_connection *lsn) {
struct mg_connection *c = NULL;
union usa usa;
socklen_t sa_len = sizeof(usa.sin);
SOCKET fd = accept(FD(lsn), &usa.sa, &sa_len);
if (fd == INVALID_SOCKET) {
LOG(LL_ERROR, ("%lu accept failed, errno %d", lsn->id, MG_SOCK_ERRNO));
#if !defined(_WIN32)
} else if (fd >= FD_SETSIZE) {
LOG(LL_ERROR, ("%ld > %ld", (long) fd, (long) FD_SETSIZE));
closesocket(fd);
#endif
} else if ((c = alloc_conn(mgr, 0, fd)) == NULL) {
LOG(LL_ERROR, ("%lu OOM", lsn->id));
closesocket(fd);
} else {
char buf[40];
c->peer.port = usa.sin.sin_port;
memcpy(&c->peer.ip, &usa.sin.sin_addr, sizeof(c->peer.ip));
mg_straddr(c, buf, sizeof(buf));
LOG(LL_DEBUG, ("%lu accepted %s", c->id, buf));
mg_set_non_blocking_mode(FD(c));
setsockopts(c);
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->is_accepted = 1;
c->is_hexdumping = lsn->is_hexdumping;
c->pfn = lsn->pfn;
c->pfn_data = lsn->pfn_data;
c->fn = lsn->fn;
c->fn_data = lsn->fn_data;
mg_call(c, MG_EV_ACCEPT, NULL);
}
}
#if MG_ENABLE_SOCKETPAIR
bool mg_socketpair(int *s1, int *s2) {
#if MG_ARCH == MG_ARCH_UNIX
int sp[2], ret = 0;
if (socketpair(AF_INET, SOCK_DGRAM, 0, sp) == 0) {
*s1 = sp[0], *s2 = sp[1], ret = 1;
}
return ret;
#else
union usa sa, sa2;
SOCKET sp[2] = {INVALID_SOCKET, INVALID_SOCKET};
socklen_t len = sizeof(sa.sin);
int ret = 0, res[2] = {-1, -1};
(void) memset(&sa, 0, sizeof(sa));
sa.sin.sin_family = AF_INET;
sa.sin.sin_addr.s_addr = htonl(0x7f000001); /* 127.0.0.1 */
sa2 = sa;
if ((sp[0] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET &&
(sp[1] = socket(AF_INET, SOCK_DGRAM, 0)) != INVALID_SOCKET &&
bind(sp[0], &sa.sa, len) == 0 && bind(sp[1], &sa2.sa, len) == 0 &&
getsockname(sp[0], &sa.sa, &len) == 0 &&
getsockname(sp[1], &sa2.sa, &len) == 0 &&
connect(sp[0], &sa2.sa, len) == 0 && connect(sp[1], &sa.sa, len) == 0) {
mg_set_non_blocking_mode(sp[1]);
*s1 = sp[0];
*s2 = sp[1];
ret = 1;
} else {
if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
}
return ret;
#endif
}
#endif
struct mg_connection *mg_listen(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data) {
struct mg_connection *c = NULL;
int is_udp = strncmp(url, "udp:", 4) == 0;
SOCKET fd = mg_open_listener(url);
if (fd == INVALID_SOCKET) {
} else if ((c = alloc_conn(mgr, 0, fd)) == NULL) {
LOG(LL_ERROR, ("OOM %s", url));
closesocket(fd);
} else {
c->fd = (void *) (long) fd;
c->is_listening = 1;
c->is_udp = is_udp;
setsockopts(c);
LIST_ADD_HEAD(struct mg_connection, &mgr->conns, c);
c->fn = fn;
c->fn_data = fn_data;
LOG(LL_INFO, ("%lu accepting on %s", c->id, url));
}
return c;
}
static void mg_iotest(struct mg_mgr *mgr, int ms) {
#if MG_ARCH == MG_ARCH_FREERTOS
struct mg_connection *c;
for (c = mgr->conns; c != NULL; c = c->next) {
FreeRTOS_FD_CLR(c->fd, mgr->ss, eSELECT_WRITE);
if (c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0))
FreeRTOS_FD_SET(c->fd, mgr->ss, eSELECT_WRITE);
}
FreeRTOS_select(mgr->ss, pdMS_TO_TICKS(ms));
for (c = mgr->conns; c != NULL; c = c->next) {
EventBits_t bits = FreeRTOS_FD_ISSET(c->fd, mgr->ss);
c->is_readable = bits & (eSELECT_READ | eSELECT_EXCEPT) ? 1 : 0;
c->is_writable = bits & eSELECT_WRITE ? 1 : 0;
}
#else
struct timeval tv = {ms / 1000, (ms % 1000) * 1000};
struct mg_connection *c;
fd_set rset, wset;
SOCKET maxfd = 0;
int rc;
FD_ZERO(&rset);
FD_ZERO(&wset);
for (c = mgr->conns; c != NULL; c = c->next) {
// c->is_writable = 0;
// TLS might have stuff buffered, so dig everything
// c->is_readable = c->is_tls && c->is_readable ? 1 : 0;
if (c->is_closing || c->is_resolving || FD(c) == INVALID_SOCKET) continue;
FD_SET(FD(c), &rset);
if (FD(c) > maxfd) maxfd = FD(c);
if (c->is_connecting || (c->send.len > 0 && c->is_tls_hs == 0))
FD_SET(FD(c), &wset);
}
if ((rc = select(maxfd + 1, &rset, &wset, NULL, &tv)) < 0) {
LOG(LL_DEBUG, ("select: %d %d", rc, MG_SOCK_ERRNO));
FD_ZERO(&rset);
FD_ZERO(&wset);
}
for (c = mgr->conns; c != NULL; c = c->next) {
// TLS might have stuff buffered, so dig everything
c->is_readable = c->is_tls && c->is_readable
? 1
: FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &rset);
c->is_writable = FD(c) != INVALID_SOCKET && FD_ISSET(FD(c), &wset);
}
#endif
}
static void connect_conn(struct mg_connection *c) {
int rc = 0;
socklen_t len = sizeof(rc);
if (getsockopt(FD(c), SOL_SOCKET, SO_ERROR, (char *) &rc, &len)) rc = 1;
if (rc == EAGAIN || rc == EWOULDBLOCK) rc = 0;
c->is_connecting = 0;
if (rc) {
char buf[40];
mg_error(c, "error connecting to %s", mg_straddr(c, buf, sizeof(buf)));
} else {
if (c->is_tls_hs) mg_tls_handshake(c);
mg_call(c, MG_EV_CONNECT, NULL);
}
}
void mg_mgr_poll(struct mg_mgr *mgr, int ms) {
struct mg_connection *c, *tmp;
unsigned long now;
mg_iotest(mgr, ms);
now = mg_millis();
mg_timer_poll(now);
for (c = mgr->conns; c != NULL; c = tmp) {
tmp = c->next;
mg_call(c, MG_EV_POLL, &now);
LOG(LL_VERBOSE_DEBUG,
("%lu %c%c %c%c%c%c%c", c->id, c->is_readable ? 'r' : '-',
c->is_writable ? 'w' : '-', c->is_tls ? 'T' : 't',
c->is_connecting ? 'C' : 'c', c->is_tls_hs ? 'H' : 'h',
c->is_resolving ? 'R' : 'r', c->is_closing ? 'C' : 'c'));
if (c->is_resolving || c->is_closing) {
// Do nothing
} else if (c->is_listening) {
if (c->is_readable) accept_conn(mgr, c);
} else if (c->is_connecting) {
if (c->is_readable || c->is_writable) connect_conn(c);
} else if (c->is_tls_hs) {
if ((c->is_readable || c->is_writable)) mg_tls_handshake(c);
} else {
if (c->is_readable) read_conn(c, ll_read);
if (c->is_writable) write_conn(c);
}
if (c->is_draining && c->send.len == 0) c->is_closing = 1;
if (c->is_closing) close_conn(c);
}
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/str.c"
#endif
#include <stdlib.h>
struct mg_str mg_str(const char *s) {
struct mg_str str = {s, s == NULL ? 0 : strlen(s)};
return str;
}
struct mg_str mg_str_n(const char *s, size_t n) {
struct mg_str str = {s, n};
return str;
}
int mg_lower(const char *s) {
return tolower(*(const unsigned char *) s);
}
int mg_ncasecmp(const char *s1, const char *s2, size_t len) {
int diff = 0;
if (len > 0) do {
diff = mg_lower(s1++) - mg_lower(s2++);
} while (diff == 0 && s1[-1] != '\0' && --len > 0);
return diff;
}
int mg_casecmp(const char *s1, const char *s2) {
return mg_ncasecmp(s1, s2, (size_t) ~0);
}
int mg_vcmp(const struct mg_str *s1, const char *s2) {
size_t n2 = strlen(s2), n1 = s1->len;
int r = strncmp(s1->ptr, s2, (n1 < n2) ? n1 : n2);
if (r == 0) return (int) (n1 - n2);
return r;
}
int mg_vcasecmp(const struct mg_str *str1, const char *str2) {
size_t n2 = strlen(str2), n1 = str1->len;
int r = mg_ncasecmp(str1->ptr, str2, (n1 < n2) ? n1 : n2);
if (r == 0) return (int) (n1 - n2);
return r;
}
struct mg_str mg_strdup(const struct mg_str s) {
struct mg_str r = {NULL, 0};
if (s.len > 0 && s.ptr != NULL) {
char *sc = (char *) malloc(s.len + 1);
if (sc != NULL) {
memcpy(sc, s.ptr, s.len);
sc[s.len] = '\0';
r.ptr = sc;
r.len = s.len;
}
}
return r;
}
int mg_strcmp(const struct mg_str str1, const struct mg_str str2) {
size_t i = 0;
while (i < str1.len && i < str2.len) {
int c1 = str1.ptr[i];
int c2 = str2.ptr[i];
if (c1 < c2) return -1;
if (c1 > c2) return 1;
i++;
}
if (i < str1.len) return 1;
if (i < str2.len) return -1;
return 0;
}
const char *mg_strstr(const struct mg_str haystack,
const struct mg_str needle) {
size_t i;
if (needle.len > haystack.len) return NULL;
for (i = 0; i <= haystack.len - needle.len; i++) {
if (memcmp(haystack.ptr + i, needle.ptr, needle.len) == 0) {
return haystack.ptr + i;
}
}
return NULL;
}
struct mg_str mg_strstrip(struct mg_str s) {
while (s.len > 0 && isspace((int) *s.ptr)) s.ptr++, s.len--;
while (s.len > 0 && isspace((int) *(s.ptr + s.len - 1))) s.len--;
return s;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/timer.c"
#endif
// Copyright (c) Cesanta Software Limited
// All rights reserved
struct mg_timer *g_timers;
void mg_timer_init(struct mg_timer *t, int ms, int flags, void (*fn)(void *),
void *arg) {
struct mg_timer tmp = {ms, flags, fn, arg, 0UL, g_timers};
*t = tmp;
g_timers = t;
if (flags & MG_TIMER_RUN_NOW) fn(arg);
}
void mg_timer_free(struct mg_timer *t) {
struct mg_timer **head = &g_timers;
while (*head && *head != t) head = &(*head)->next;
if (*head) *head = t->next;
}
void mg_timer_poll(unsigned long now_ms) {
// If time goes back (wrapped around), reset timers
struct mg_timer *t, *tmp;
static unsigned long oldnow; // Timestamp in a previous invocation
if (oldnow > now_ms) { // If it is wrapped, reset timers
for (t = g_timers; t != NULL; t = t->next) t->expire = 0;
}
oldnow = now_ms;
for (t = g_timers; t != NULL; t = tmp) {
tmp = t->next;
if (t->expire == 0) t->expire = now_ms + t->period_ms;
if (t->expire > now_ms) continue;
t->fn(t->arg);
// Try to tick timers with the given period as accurate as possible,
// even if this polling function is called with some random period.
t->expire = now_ms - t->expire > (unsigned long) t->period_ms
? now_ms + t->period_ms
: t->expire + t->period_ms;
if (!(t->flags & MG_TIMER_REPEAT)) mg_timer_free(t);
}
}
#ifdef MG_ENABLE_LINES
#line 1 "src/tls.c"
#endif
#if MG_ENABLE_MBEDTLS ///////////////////////////////////////// MBEDTLS
#include <mbedtls/debug.h>
#include <mbedtls/ssl.h>
// Different versions have those in different files, so declare here
#ifdef __cplusplus
#define EXTERN_C extern "C"
#else
#define EXTERN_C
#endif
EXTERN_C int mbedtls_net_recv(void *, unsigned char *, size_t);
EXTERN_C int mbedtls_net_send(void *, const unsigned char *, size_t);
struct mg_tls {
char *cafile; // CA certificate path
mbedtls_x509_crt ca; // Parsed CA certificate
mbedtls_x509_crt cert; // Parsed certificate
mbedtls_ssl_context ssl; // SSL/TLS context
mbedtls_ssl_config conf; // SSL-TLS config
mbedtls_pk_context pk; // Private key context
};
int mg_tls_handshake(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int rc;
mbedtls_ssl_set_bio(&tls->ssl, &c->fd, mbedtls_net_send, mbedtls_net_recv, 0);
rc = mbedtls_ssl_handshake(&tls->ssl);
if (rc == 0) { // Success
LOG(LL_DEBUG, ("%lu success", c->id));
c->is_tls_hs = 0;
} else if (rc == MBEDTLS_ERR_SSL_WANT_READ ||
rc == MBEDTLS_ERR_SSL_WANT_WRITE) { // Still pending
LOG(LL_VERBOSE_DEBUG, ("%lu pending, %d%d %d (-%#x)", c->id,
c->is_connecting, c->is_tls_hs, rc, -rc));
} else {
mg_error(c, "TLS handshake: -%#x", -rc); // Error
}
return rc == 0;
}
static int mbed_rng(void *ctx, unsigned char *buf, size_t len) {
mg_random(buf, len);
(void) ctx;
return 0;
}
static void debug_cb(void *c, int lev, const char *s, int n, const char *s2) {
n = strlen(s2) - 1;
LOG(LL_VERBOSE_DEBUG, ("%p %.*s", ((struct mg_connection *) c)->fd, n, s2));
(void) s;
(void) c;
(void) lev;
}
int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls));
int rc = 0;
LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id,
opts->ca == NULL ? "null" : opts->ca,
opts->cert == NULL ? "null" : opts->cert,
opts->certkey == NULL ? "null" : opts->certkey));
mbedtls_ssl_init(&tls->ssl);
mbedtls_ssl_config_init(&tls->conf);
mbedtls_ssl_conf_dbg(&tls->conf, debug_cb, c);
#if !defined(ESP_PLATFORM)
mbedtls_debug_set_threshold(5);
#endif
if ((rc = mbedtls_ssl_config_defaults(
&tls->conf,
c->is_client ? MBEDTLS_SSL_IS_CLIENT : MBEDTLS_SSL_IS_SERVER,
MBEDTLS_SSL_TRANSPORT_STREAM, MBEDTLS_SSL_PRESET_DEFAULT)) != 0) {
mg_error(c, "tls defaults %#x", -rc);
goto fail;
}
mbedtls_ssl_conf_rng(&tls->conf, mbed_rng, c);
if (opts->ca == NULL || strcmp(opts->ca, "*") == 0) {
mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_NONE);
}
if (opts->ca != NULL && opts->ca[0] != '\0') {
#if defined(MBEDTLS_X509_CA_CHAIN_ON_DISK)
tls->cafile = strdup(opts->ca);
rc = mbedtls_ssl_conf_ca_chain_file(&tls->conf, tls->cafile, NULL);
if (rc != 0) {
mg_error(c, "parse on-disk chain(%s) err %#x", opts->ca, -rc);
goto fail;
}
#else
mbedtls_x509_crt_init(&tls->ca);
if ((rc = mbedtls_x509_crt_parse_file(&tls->ca, opts->ca)) != 0) {
mg_error(c, "parse(%s) err %#x", opts->ca, -rc);
goto fail;
}
mbedtls_ssl_conf_ca_chain(&tls->conf, &tls->ca, NULL);
#endif
mbedtls_ssl_conf_authmode(&tls->conf, MBEDTLS_SSL_VERIFY_REQUIRED);
}
if (opts->cert != NULL && opts->cert[0] != '\0') {
const char *key = opts->certkey;
if (key == NULL) key = opts->cert;
mbedtls_x509_crt_init(&tls->cert);
mbedtls_pk_init(&tls->pk);
if ((rc = mbedtls_x509_crt_parse_file(&tls->cert, opts->cert)) != 0) {
mg_error(c, "parse(%s) err %#x", opts->cert, -rc);
goto fail;
}
if ((rc = mbedtls_pk_parse_keyfile(&tls->pk, key, NULL)) != 0) {
mg_error(c, "tls key(%s) %#x", key, -rc);
goto fail;
}
rc = mbedtls_ssl_conf_own_cert(&tls->conf, &tls->cert, &tls->pk);
if (rc != 0) {
mg_error(c, "own cert %#x", -rc);
goto fail;
}
}
if ((rc = mbedtls_ssl_setup(&tls->ssl, &tls->conf)) != 0) {
mg_error(c, "setup err %#x", -rc);
goto fail;
}
c->tls = tls;
c->is_tls = 1;
c->is_tls_hs = 1;
if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) {
mg_tls_handshake(c);
}
return 1;
fail:
c->is_closing = 1;
free(tls);
return 0;
}
int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = mbedtls_ssl_read(&tls->ssl, (unsigned char *) buf, len);
*fail = (n == 0) || (n < 0 && n != MBEDTLS_ERR_SSL_WANT_READ);
return n;
}
int mg_tls_send(struct mg_connection *c, const void *buf, size_t len,
int *fail) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = mbedtls_ssl_write(&tls->ssl, (unsigned char *) buf, len);
*fail = (n == 0) || (n < 0 && n != MBEDTLS_ERR_SSL_WANT_WRITE);
return n;
}
int mg_tls_free(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
if (tls == NULL) return 0;
free(tls->cafile);
mbedtls_x509_crt_free(&tls->ca);
mbedtls_x509_crt_free(&tls->cert);
mbedtls_ssl_free(&tls->ssl);
mbedtls_pk_free(&tls->pk);
mbedtls_ssl_config_free(&tls->conf);
free(tls);
return 1;
}
#elif MG_ENABLE_OPENSSL ///////////////////////////////////////// OPENSSL
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/ssl.h>
struct mg_tls {
SSL_CTX *ctx;
SSL *ssl;
};
static int mg_tls_err(struct mg_tls *tls, int res) {
int err = SSL_get_error(tls->ssl, res);
// We've just fetched the last error from the queue.
// Now we need to clear the error queue. If we do not, then the following
// can happen (actually reported):
// - A new connection is accept()-ed with cert error (e.g. self-signed cert)
// - Since all accept()-ed connections share listener's context,
// - *ALL* SSL accepted connection report read error on the next poll cycle.
// Thus a single errored connection can close all the rest, unrelated ones.
// Clearing the error keeps the shared SSL_CTX in an OK state.
ERR_clear_error();
if (err == SSL_ERROR_WANT_READ) return 0;
if (err == SSL_ERROR_WANT_WRITE) return 0;
return err;
}
int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
struct mg_tls *tls = (struct mg_tls *) calloc(1, sizeof(*tls));
const char *id = "mongoose";
static unsigned char s_initialised = 0;
int rc;
if (!s_initialised) {
SSL_library_init();
s_initialised++;
}
LOG(LL_DEBUG, ("%lu Setting TLS, CA: %s, cert: %s, key: %s", c->id,
opts->ca == NULL ? "null" : opts->ca,
opts->cert == NULL ? "null" : opts->cert,
opts->certkey == NULL ? "null" : opts->certkey));
tls->ctx = c->is_client ? SSL_CTX_new(SSLv23_client_method())
: SSL_CTX_new(SSLv23_server_method());
if ((tls->ssl = SSL_new(tls->ctx)) == NULL) {
mg_error(c, "SSL_new");
goto fail;
}
SSL_set_session_id_context(tls->ssl, (const uint8_t *) id, strlen(id));
// Disable deprecated protocols
SSL_set_options(tls->ssl, SSL_OP_NO_SSLv2);
SSL_set_options(tls->ssl, SSL_OP_NO_SSLv3);
SSL_set_options(tls->ssl, SSL_OP_NO_TLSv1);
#ifdef MG_ENABLE_OPENSSL_NO_COMPRESSION
SSL_set_options(tls->ssl, SSL_OP_NO_COMPRESSION);
#endif
#ifdef MG_ENABLE_OPENSSL_CIPHER_SERVER_PREFERENCE
SSL_set_options(tls->ssl, SSL_OP_CIPHER_SERVER_PREFERENCE);
#endif
if (opts->ca != NULL && opts->ca[0] != '\0') {
if ((rc = SSL_CTX_load_verify_locations(tls->ctx, opts->ca, NULL)) != 1) {
mg_error(c, "parse(%s): err %d", opts->ca, mg_tls_err(tls, rc));
goto fail;
}
SSL_set_verify(tls->ssl, SSL_VERIFY_PEER | SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
0);
}
if (opts->cert != NULL && opts->cert[0] != '\0') {
const char *key = opts->certkey;
if (key == NULL) key = opts->cert;
if ((rc = SSL_use_certificate_file(tls->ssl, opts->cert, 1)) != 1) {
mg_error(c, "Invalid SSL cert, err %d", mg_tls_err(tls, rc));
goto fail;
} else if ((rc = SSL_use_PrivateKey_file(tls->ssl, key, 1)) != 1) {
mg_error(c, "Invalid SSL key, err %d", mg_tls_err(tls, rc));
goto fail;
#if OPENSSL_VERSION_NUMBER > 0x10002000L
} else if ((rc = SSL_use_certificate_chain_file(tls->ssl, opts->cert)) !=
1) {
mg_error(c, "Invalid CA, err %d", mg_tls_err(tls, rc));
goto fail;
#endif
} else {
SSL_set_mode(tls->ssl, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);
#if OPENSSL_VERSION_NUMBER > 0x10002000L
SSL_set_ecdh_auto(tls->ssl, 1);
#endif
}
}
if (opts->ciphers != NULL) SSL_set_cipher_list(tls->ssl, opts->ciphers);
if (opts->srvname != NULL) SSL_set_tlsext_host_name(tls->ssl, opts->srvname);
c->tls = tls;
c->is_tls = 1;
c->is_tls_hs = 1;
if (c->is_client && c->is_resolving == 0 && c->is_connecting == 0) {
mg_tls_handshake(c);
}
c->is_hexdumping = 1;
LOG(LL_INFO, ("SSL SETUP OK, %s", c->is_accepted ? "accepted" : "client"));
return 1;
fail:
c->is_closing = 1;
free(tls);
return 0;
}
int mg_tls_handshake(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int rc;
SSL_set_fd(tls->ssl, (int) c->fd);
rc = c->is_client ? SSL_connect(tls->ssl) : SSL_accept(tls->ssl);
if (rc == 1) {
LOG(LL_DEBUG, ("%lu success", c->id));
c->is_tls_hs = 0;
return 1;
} else {
ERR_print_errors_fp(stderr);
int code = mg_tls_err(tls, rc);
if (code != 0) mg_error(c, "tls hs: rc %d, err %d", rc, code);
return 0;
}
}
int mg_tls_free(struct mg_connection *c) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
if (tls == NULL) return 0;
SSL_free(tls->ssl);
SSL_CTX_free(tls->ctx);
free(tls);
return 1;
}
int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = SSL_read(tls->ssl, buf, len);
*fail = (n == 0) || (n < 0 && mg_tls_err(tls, n) != 0);
return n;
}
int mg_tls_send(struct mg_connection *c, const void *buf, size_t len,
int *fail) {
struct mg_tls *tls = (struct mg_tls *) c->tls;
int n = SSL_write(tls->ssl, buf, len);
*fail = (n == 0) || (n < 0 && mg_tls_err(tls, n) != 0);
return n;
}
#else ////////////////////////////////////////// NO TLS
int mg_tls_init(struct mg_connection *c, struct mg_tls_opts *opts) {
(void) opts;
mg_error(c, "TLS is not enabled");
return 0;
}
int mg_tls_handshake(struct mg_connection *c) {
return c != NULL;
}
int mg_tls_free(struct mg_connection *c) {
return c != NULL;
}
int mg_tls_recv(struct mg_connection *c, void *buf, size_t len, int *fail) {
*fail = 1;
return c == NULL || buf == NULL || len == 0 ? 0 : -1;
}
int mg_tls_send(struct mg_connection *c, const void *buf, size_t len,
int *fail) {
*fail = 1;
return c == NULL || buf == NULL || len == 0 ? 0 : -1;
}
#endif
#ifdef MG_ENABLE_LINES
#line 1 "src/url.c"
#endif
#include <stdlib.h>
struct url {
int key, user, pass, host, port, uri, end;
};
int mg_url_is_ssl(const char *url) {
return strncmp(url, "wss:", 4) == 0 || strncmp(url, "https:", 6) == 0 ||
strncmp(url, "mqtts:", 6) == 0 || strncmp(url, "ssl:", 4) == 0 ||
strncmp(url, "tls:", 4) == 0;
}
static struct url urlparse(const char *url) {
int i;
struct url u;
memset(&u, 0, sizeof(u));
for (i = 0; url[i] != '\0'; i++) {
if (i > 0 && url[i - 1] == '/' && url[i] == '/') {
u.host = i + 1;
u.port = 0;
} else if (url[i] == ']') {
u.port = 0; // IPv6 URLs, like http://[::1]/bar
} else if (url[i] == ':') {
u.port = i + 1;
} else if (url[i] == '@') {
u.user = u.host;
u.pass = u.port;
u.host = i + 1;
u.port = 0;
} else if (u.host && !u.uri && url[i] == '/') {
u.uri = i;
}
}
u.end = i;
#if 0
printf("[%s] %d %d %d %d %d\n", url, u.user, u.pass, u.host, u.port, u.uri);
#endif
return u;
}
struct mg_str mg_url_host(const char *url) {
struct url u = urlparse(url);
int n =
u.port ? u.port - u.host - 1 : u.uri ? u.uri - u.host : u.end - u.host;
struct mg_str s = mg_str_n(url + u.host, n);
if (s.len > 2 && s.ptr[0] == '[' && s.ptr[s.len - 1] == ']') {
s.len -= 2;
s.ptr++;
}
return s;
}
const char *mg_url_uri(const char *url) {
struct url u = urlparse(url);
return u.uri ? url + u.uri : "/";
}
unsigned short mg_url_port(const char *url) {
struct url u = urlparse(url);
unsigned short port = 0;
if (memcmp(url, "http:", 5) == 0) port = 80;
if (memcmp(url, "wss:", 4) == 0 || memcmp(url, "https:", 6) == 0) port = 443;
if (memcmp(url, "mqtt:", 5) == 0) port = 1883;
if (memcmp(url, "mqtts:", 6) == 0) port = 8883;
if (u.port) port = atoi(url + u.port);
return port;
}
struct mg_str mg_url_user(const char *url) {
struct url u = urlparse(url);
struct mg_str s = mg_str("");
if (u.user && (u.pass || u.host)) {
int n = u.pass ? u.pass - u.user - 1 : u.host - u.user - 1;
s = mg_str_n(url + u.user, n);
}
return s;
}
struct mg_str mg_url_pass(const char *url) {
struct url u = urlparse(url);
struct mg_str s = mg_str("");
if (u.pass && u.host) {
int n = u.host - u.pass - 1;
s = mg_str_n(url + u.pass, n);
}
return s;
}
#ifdef MG_ENABLE_LINES
#line 1 "src/util.c"
#endif
size_t mg_file_size(const char *path) {
#if MG_ARCH == MG_ARCH_FREERTOS
struct FF_STAT st;
return ff_stat(path, &st) == 0 ? st.st_size : 0;
#else
struct stat st;
return stat(path, &st) == 0 ? st.st_size : 0;
#endif
}
char *mg_file_read(const char *path) {
FILE *fp;
char *data = NULL;
size_t size = mg_file_size(path);
if ((fp = fopen(path, "rb")) != NULL) {
data = (char *) malloc(size + 1);
if (data != NULL) {
if (fread(data, 1, size, fp) != size) {
free(data);
data = NULL;
} else {
data[size] = '\0';
}
}
fclose(fp);
}
return data;
}
int mg_file_write(const char *path, const char *fmt, ...) {
char tmp[100];
int written = 0;
FILE *fp;
snprintf(tmp, sizeof(tmp), "%s.%d", path, rand());
fp = fopen(tmp, "wb");
if (fp != NULL) {
va_list ap;
va_start(ap, fmt);
written = vfprintf(fp, fmt, ap);
va_end(ap);
fclose(fp);
remove(path);
rename(tmp, path);
}
return written;
}
void mg_random(void *buf, size_t len) {
FILE *fp = fopen("/dev/urandom", "rb");
size_t i, n = 0;
if (fp != NULL) n = fread(buf, 1, len, fp);
if (fp == NULL || n <= 0) {
for (i = 0; i < len; i++) ((unsigned char *) buf)[i] = rand() % 0xff;
}
if (fp != NULL) fclose(fp);
}
bool mg_globmatch(const char *s1, int n1, const char *s2, int n2) {
int i = 0, j = 0, ni = 0, nj = 0;
while (i < n1 || j < n2) {
if (i < n1 && j < n2 && (s1[i] == '?' || s2[j] == s1[i])) {
i++, j++;
} else if (i < n1 && (s1[i] == '*' || s1[i] == '#')) {
ni = i, nj = j + 1, i++;
} else if (nj > 0 && nj <= n2 && (s1[i - 1] == '#' || s2[j] != '/')) {
i = ni, j = nj;
} else {
return false;
}
}
return true;
}
static int mg_nextcommaentry(const char *s, int slen, int ofs, int *koff,
int *klen, int *voff, int *vlen) {
int kvlen, kl;
for (kvlen = 0; ofs + kvlen < slen && s[ofs + kvlen] != ',';) kvlen++;
for (kl = 0; kl < kvlen && s[ofs + kl] != '=';) kl++;
if (koff != NULL) *koff = ofs;
if (klen != NULL) *klen = kl;
if (voff != NULL) *voff = kl < kvlen ? ofs + kl + 1 : 0;
if (vlen != NULL) *vlen = kl < kvlen ? kvlen - kl - 1 : 0;
return ofs >= slen ? slen : ofs + kvlen + 1;
}
bool mg_next_comma_entry(struct mg_str *s, struct mg_str *k, struct mg_str *v) {
int koff, klen, voff, vlen;
int off = mg_nextcommaentry(s->ptr, s->len, 0, &koff, &klen, &voff, &vlen);
if (k != NULL) *k = mg_str_n(s->ptr + koff, klen);
if (v != NULL) *v = mg_str_n(s->ptr + voff, vlen);
*s = mg_str_n(s->ptr + off, s->len - off);
return off > 0;
}
uint32_t mg_ntohl(uint32_t net) {
uint8_t data[4] = {0, 0, 0, 0};
memcpy(&data, &net, sizeof(data));
return ((uint32_t) data[3] << 0) | ((uint32_t) data[2] << 8) |
((uint32_t) data[1] << 16) | ((uint32_t) data[0] << 24);
}
uint16_t mg_ntohs(uint16_t net) {
uint8_t data[2] = {0, 0};
memcpy(&data, &net, sizeof(data));
return ((uint16_t) data[1] << 0) | ((uint32_t) data[0] << 8);
}
char *mg_hexdump(const void *buf, size_t len) {
const unsigned char *p = (const unsigned char *) buf;
size_t i, idx, n = 0, ofs = 0, dlen = len * 5 + 100;
char ascii[17] = "", *dst = (char *) malloc(dlen);
if (dst == NULL) return dst;
for (i = 0; i < len; i++) {
idx = i % 16;
if (idx == 0) {
if (i > 0 && dlen > n) n += snprintf(dst + n, dlen - n, " %s\n", ascii);
if (dlen > n) n += snprintf(dst + n, dlen - n, "%04x ", (int) (i + ofs));
}
if (dlen < n) break;
n += snprintf(dst + n, dlen - n, " %02x", p[i]);
ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i];
ascii[idx + 1] = '\0';
}
while (i++ % 16) {
if (n < dlen) n += snprintf(dst + n, dlen - n, "%s", " ");
}
if (n < dlen) n += snprintf(dst + n, dlen - n, " %s\n", ascii);
if (n > dlen - 1) n = dlen - 1;
dst[n] = '\0';
return dst;
}
char *mg_hex(const void *buf, int len, char *to) {
const unsigned char *p = (const unsigned char *) buf;
static const char *hex = "0123456789abcdef";
int i = 0;
for (; len--; p++) {
to[i++] = hex[p[0] >> 4];
to[i++] = hex[p[0] & 0x0f];
}
to[i] = '\0';
return to;
}
unsigned long mg_unhexn(const char *s, int len) {
unsigned long i = 0, v = 0;
for (i = 0; i < (unsigned long) len; i++) {
int c = s[i];
if (i > 0) v <<= 4;
v |= (c >= '0' && c <= '9') ? c - '0'
: (c >= 'A' && c <= 'F') ? c - '7' : c - 'W';
}
return v;
}
void mg_unhex(const char *buf, int len, unsigned char *to) {
int i;
for (i = 0; i < len; i += 2) {
to[i >> 1] = (unsigned char) mg_unhexn(&buf[i], 2);
}
}
int mg_vasprintf(char **buf, size_t size, const char *fmt, va_list ap) {
va_list ap_copy;
int len;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
if (len < 0) {
// eCos and Windows are not standard-compliant and return -1 when
// the buffer is too small. Keep allocating larger buffers until we
// succeed or out of memory.
// LCOV_EXCL_START
*buf = NULL;
while (len < 0) {
free(*buf);
if (size == 0) size = 5;
size *= 2;
if ((*buf = (char *) malloc(size)) == NULL) {
len = -1;
break;
}
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size - 1, fmt, ap_copy);
va_end(ap_copy);
}
// Microsoft version of vsnprintf() is not always null-terminated, so put
// the terminator manually
(*buf)[len] = 0;
// LCOV_EXCL_STOP
} else if (len >= (int) size) {
/// Standard-compliant code path. Allocate a buffer that is large enough
if ((*buf = (char *) malloc(len + 1)) == NULL) {
len = -1; // LCOV_EXCL_LINE
} else { // LCOV_EXCL_LINE
va_copy(ap_copy, ap);
len = vsnprintf(*buf, len + 1, fmt, ap_copy);
va_end(ap_copy);
}
}
return len;
}
int mg_asprintf(char **buf, size_t size, const char *fmt, ...) {
int ret;
va_list ap;
va_start(ap, fmt);
ret = mg_vasprintf(buf, size, fmt, ap);
va_end(ap);
return ret;
}
int64_t mg_to64(struct mg_str str) {
int64_t result = 0, neg = 1;
size_t i = 0;
while (i < str.len && (str.ptr[i] == ' ' || str.ptr[i] == '\t')) i++;
if (i < str.len && str.ptr[i] == '-') neg = -1, i++;
while (i < str.len && str.ptr[i] >= '0' && str.ptr[i] <= '9') {
result *= 10;
result += (str.ptr[i] - '0');
i++;
}
return result * neg;
}
double mg_time(void) {
#if MG_ARCH == MG_ARCH_WIN32
SYSTEMTIME sysnow;
FILETIME ftime;
GetLocalTime(&sysnow);
SystemTimeToFileTime(&sysnow, &ftime);
/*
* 1. VC 6.0 doesn't support conversion uint64 -> double, so, using int64
* This should not cause a problems in this (21th) century
* 2. Windows FILETIME is a number of 100-nanosecond intervals since January
* 1, 1601 while time_t is a number of _seconds_ since January 1, 1970 UTC,
* thus, we need to convert to seconds and adjust amount (subtract 11644473600
* seconds)
*/
return (double) (((int64_t) ftime.dwLowDateTime +
((int64_t) ftime.dwHighDateTime << 32)) /
10000000.0) -
11644473600;
#else
struct timeval tv;
if (gettimeofday(&tv, NULL /* tz */) != 0) return 0;
return (double) tv.tv_sec + (((double) tv.tv_usec) / 1000000.0);
#endif /* _WIN32 */
}
void mg_usleep(unsigned long usecs) {
#if MG_ARCH == MG_ARCH_WIN32
Sleep(usecs / 1000);
#elif MG_ARCH == MG_ARCH_ESP8266
ets_delay_us(usecs);
#else
usleep(usecs);
#endif
}
unsigned long mg_millis(void) {
#if MG_ARCH == MG_ARCH_WIN32
return GetTickCount();
#elif MG_ARCH == MG_ARCH_ESP32
return esp_timer_get_time() / 1000;
#elif MG_ARCH == MG_ARCH_ESP8266
return system_get_time() / 1000;
#elif MG_ARCH == MG_ARCH_FREERTOS
return xTaskGetTickCount() * portTICK_PERIOD_MS;
#else
struct timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return ts.tv_sec * 1000 + ts.tv_nsec / 1000000;
#endif
}
#ifdef MG_ENABLE_LINES
#line 1 "src/ws.c"
#endif
struct ws_msg {
uint8_t flags;
size_t header_len;
size_t data_len;
};
static void ws_handshake(struct mg_connection *c, const char *key,
size_t key_len) {
const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
unsigned char sha[20], b64_sha[30];
// mem[256], *buf = mem;
// int len = 0;
mg_sha1_ctx sha_ctx;
mg_sha1_init(&sha_ctx);
mg_sha1_update(&sha_ctx, (unsigned char *) key, key_len);
mg_sha1_update(&sha_ctx, (unsigned char *) magic, 36);
mg_sha1_final(sha, &sha_ctx);
mg_base64_encode(sha, sizeof(sha), (char *) b64_sha);
mg_printf(c,
"HTTP/1.1 101 Switching Protocols\r\n"
"Upgrade: websocket\r\n"
"Connection: Upgrade\r\n"
"Sec-WebSocket-Accept: %s\r\n\r\n",
b64_sha);
// mg_send(c, buf, len);
// if (buf != mem) free(buf);
}
static size_t ws_process(uint8_t *buf, size_t len, struct ws_msg *msg) {
size_t i, n = 0, mask_len = 0;
memset(msg, 0, sizeof(*msg));
if (len >= 2) {
n = buf[1] & 0x7f;
mask_len = buf[1] & WEBSOCKET_FLAGS_MASK_FIN ? 4 : 0;
msg->flags = *(unsigned char *) buf;
if (n < 126 && len >= mask_len) {
msg->data_len = n;
msg->header_len = 2 + mask_len;
} else if (n == 126 && len >= 4 + mask_len) {
msg->header_len = 4 + mask_len;
msg->data_len = mg_ntohs(*(uint16_t *) &buf[2]);
} else if (len >= 10 + mask_len) {
msg->header_len = 10 + mask_len;
msg->data_len =
(int) (((uint64_t) mg_ntohl(*(uint32_t *) &buf[2])) << 32) +
mg_ntohl(*(uint32_t *) &buf[6]);
}
}
if (msg->header_len + msg->data_len > len) return 0;
if (mask_len > 0) {
uint8_t *p = buf + msg->header_len, *m = p - mask_len;
for (i = 0; i < msg->data_len; i++) p[i] ^= m[i & 3];
}
return msg->header_len + msg->data_len;
}
size_t mg_ws_send(struct mg_connection *c, const char *buf, size_t len,
int op) {
unsigned char header[10], mask[4];
size_t i, header_len = 0;
header[0] = (uint8_t)(op | WEBSOCKET_FLAGS_MASK_FIN);
if (len < 126) {
header[1] = (unsigned char) len;
header_len = 2;
} else if (len < 65535) {
uint16_t tmp = mg_htons((uint16_t) len);
header[1] = 126;
memcpy(&header[2], &tmp, sizeof(tmp));
header_len = 4;
} else {
uint32_t tmp;
header[1] = 127;
tmp = mg_htonl((uint32_t)((uint64_t) len >> 32));
memcpy(&header[2], &tmp, sizeof(tmp));
tmp = mg_htonl((uint32_t)(len & 0xffffffff));
memcpy(&header[6], &tmp, sizeof(tmp));
header_len = 10;
}
if (c->is_client) header[1] |= 1 << 7; // Set masking flag
mg_send(c, header, header_len);
if (c->is_client) {
mg_random(mask, sizeof(mask));
mg_send(c, mask, sizeof(mask));
header_len += sizeof(mask);
}
LOG(LL_VERBOSE_DEBUG, ("WS out: %d [%.*s]", (int) len, (int) len, buf));
mg_send(c, buf, len);
if (c->is_client) {
uint8_t *p = c->send.buf + c->send.len - len;
for (i = 0; i < len; i++) p[i] ^= mask[i & 3];
}
return header_len + len;
}
static void mg_ws_cb(struct mg_connection *c, int ev, void *ev_data,
void *fn_data) {
struct ws_msg msg;
if (ev == MG_EV_READ) {
if (!c->is_websocket && c->is_client) {
int n = mg_http_get_request_len(c->recv.buf, c->recv.len);
if (n < 0) {
c->is_closing = 1; // Some just, not an HTTP request
} else if (n > 0) {
if (n < 15 || memcmp(c->recv.buf + 9, "101", 3) != 0) {
LOG(LL_ERROR,
("%lu WS handshake error: %.*s", c->id, 15, c->recv.buf));
c->is_closing = 1;
} else {
c->is_websocket = 1;
mg_call(c, MG_EV_WS_OPEN, NULL);
}
mg_iobuf_delete(&c->recv, n);
} else {
return; // A request is not yet received
}
}
while (ws_process(c->recv.buf, c->recv.len, &msg) > 0) {
char *s = (char *) c->recv.buf + msg.header_len;
struct mg_ws_message m = {{s, msg.data_len}, msg.flags};
switch (msg.flags & WEBSOCKET_FLAGS_MASK_OP) {
case WEBSOCKET_OP_PING:
LOG(LL_DEBUG, ("%s", "WS PONG"));
mg_ws_send(c, s, msg.data_len, WEBSOCKET_OP_PONG);
mg_call(c, MG_EV_WS_CTL, &m);
break;
case WEBSOCKET_OP_PONG:
mg_call(c, MG_EV_WS_CTL, &m);
break;
case WEBSOCKET_OP_CLOSE:
LOG(LL_ERROR, ("%lu Got WS CLOSE", c->id));
mg_call(c, MG_EV_WS_CTL, &m);
c->is_closing = 1;
return;
default: {
mg_call(c, MG_EV_WS_MSG, &m);
break;
}
}
mg_iobuf_delete(&c->recv, msg.header_len + msg.data_len);
}
}
(void) fn_data;
(void) ev_data;
}
struct mg_connection *mg_ws_connect(struct mg_mgr *mgr, const char *url,
mg_event_handler_t fn, void *fn_data,
const char *fmt, ...) {
struct mg_connection *c = mg_connect(mgr, url, fn, fn_data);
if (c != NULL) {
char nonce[16], key[30], mem1[128], mem2[256], *buf1 = mem1, *buf2 = mem2;
struct mg_str host = mg_url_host(url);
int n1 = 0, n2 = 0;
if (fmt != NULL) {
va_list ap;
va_start(ap, fmt);
n1 = mg_vasprintf(&buf1, sizeof(mem1), fmt, ap);
va_end(ap);
}
// Send handshake request
// mg_url_host(url, host, sizeof(host));
mg_random(nonce, sizeof(nonce));
mg_base64_encode((unsigned char *) nonce, sizeof(nonce), key);
// LOG(LL_DEBUG, "%p [%s]", uri, uri == NULL ? "???" : uri);
n2 = mg_asprintf(&buf2, sizeof(mem2),
"GET %s HTTP/1.1\r\n"
"Upgrade: websocket\r\n"
"Host: %.*s\r\n"
"Connection: Upgrade\r\n"
"%.*s"
"Sec-WebSocket-Version: 13\r\n"
"Sec-WebSocket-Key: %s\r\n"
"\r\n",
mg_url_uri(url), (int) host.len, host.ptr, n1, buf1, key);
mg_send(c, buf2, n2);
if (buf1 != mem1) free(buf1);
if (buf2 != mem2) free(buf2);
c->pfn = mg_ws_cb;
c->fn_data = fn_data;
}
return c;
}
void mg_ws_upgrade(struct mg_connection *c, struct mg_http_message *hm) {
struct mg_str *wskey = mg_http_get_header(hm, "Sec-WebSocket-Key");
c->pfn = mg_ws_cb;
if (wskey != NULL) ws_handshake(c, wskey->ptr, wskey->len);
c->is_websocket = 1;
}
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