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  1. /*
  2.  * TLS/SSL Protocol
  3.  * Copyright (c) 2011 Martin Storsjo
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "avformat.h"
  23. #include "internal.h"
  24. #include "network.h"
  25. #include "os_support.h"
  26. #include "url.h"
  27. #include "tls.h"
  28. #include "libavutil/avstring.h"
  29. #include "libavutil/opt.h"
  30. #include "libavutil/parseutils.h"
  31.  
  32. static void set_options(TLSShared *c, const char *uri)
  33. {
  34.     char buf[1024];
  35.     const char *p = strchr(uri, '?');
  36.     if (!p)
  37.         return;
  38.  
  39.     if (!c->ca_file && av_find_info_tag(buf, sizeof(buf), "cafile", p))
  40.         c->ca_file = av_strdup(buf);
  41.  
  42.     if (!c->verify && av_find_info_tag(buf, sizeof(buf), "verify", p)) {
  43.         char *endptr = NULL;
  44.         c->verify = strtol(buf, &endptr, 10);
  45.         if (buf == endptr)
  46.             c->verify = 1;
  47.     }
  48.  
  49.     if (!c->cert_file && av_find_info_tag(buf, sizeof(buf), "cert", p))
  50.         c->cert_file = av_strdup(buf);
  51.  
  52.     if (!c->key_file && av_find_info_tag(buf, sizeof(buf), "key", p))
  53.         c->key_file = av_strdup(buf);
  54. }
  55.  
  56. int ff_tls_open_underlying(TLSShared *c, URLContext *parent, const char *uri, AVDictionary **options)
  57. {
  58.     int port;
  59.     const char *p;
  60.     char buf[200], opts[50] = "";
  61.     struct addrinfo hints = { 0 }, *ai = NULL;
  62.     const char *proxy_path;
  63.     int use_proxy;
  64.  
  65.     set_options(c, uri);
  66.  
  67.     if (c->listen)
  68.         snprintf(opts, sizeof(opts), "?listen=1");
  69.  
  70.     av_url_split(NULL, 0, NULL, 0, c->underlying_host, sizeof(c->underlying_host), &port, NULL, 0, uri);
  71.  
  72.     p = strchr(uri, '?');
  73.  
  74.     if (!p) {
  75.         p = opts;
  76.     } else {
  77.         if (av_find_info_tag(opts, sizeof(opts), "listen", p))
  78.             c->listen = 1;
  79.     }
  80.  
  81.     ff_url_join(buf, sizeof(buf), "tcp", NULL, c->underlying_host, port, "%s", p);
  82.  
  83.     hints.ai_flags = AI_NUMERICHOST;
  84.     if (!getaddrinfo(c->underlying_host, NULL, &hints, &ai)) {
  85.         c->numerichost = 1;
  86.         freeaddrinfo(ai);
  87.     }
  88.  
  89.     if (!c->host && !(c->host = av_strdup(c->underlying_host)))
  90.         return AVERROR(ENOMEM);
  91.  
  92.     proxy_path = getenv("http_proxy");
  93.     use_proxy = !ff_http_match_no_proxy(getenv("no_proxy"), c->underlying_host) &&
  94.                 proxy_path && av_strstart(proxy_path, "http://", NULL);
  95.  
  96.     if (use_proxy) {
  97.         char proxy_host[200], proxy_auth[200], dest[200];
  98.         int proxy_port;
  99.         av_url_split(NULL, 0, proxy_auth, sizeof(proxy_auth),
  100.                      proxy_host, sizeof(proxy_host), &proxy_port, NULL, 0,
  101.                      proxy_path);
  102.         ff_url_join(dest, sizeof(dest), NULL, NULL, c->underlying_host, port, NULL);
  103.         ff_url_join(buf, sizeof(buf), "httpproxy", proxy_auth, proxy_host,
  104.                     proxy_port, "/%s", dest);
  105.     }
  106.  
  107.     return ffurl_open(&c->tcp, buf, AVIO_FLAG_READ_WRITE,
  108.                       &parent->interrupt_callback, options);
  109. }
  110.