src/core/sipe-media.c

   1 /**
   2  * @file sipe-media.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2010 Jakub Adam <jakub.adam@tieto.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <libpurple/mediamanager.h>
  24
  25 #include "sipe.h"
  26 #include "sipe-utils.h"
  27
  28 struct _sipe_media_session {
  29         gchar                   *with;
  30         GSList                  *sdp_attrs;
  31         struct sipmsg   *invitation;
  32 };
  33 typedef struct _sipe_media_session sipe_media_session;
  34
  35 void
  36 sipe_media_session_free(sipe_media_session* session)
  37 {
  38         if (session) {
  39                 g_free(session->with);
  40                 sipe_utils_nameval_free(session->sdp_attrs);
  41                 if (session->invitation)
  42                         sipmsg_free(session->invitation);
  43                 g_free(session);
  44         }
  45 }
  46
  47 static GList *
  48 sipe_media_parse_remote_codecs(const sipe_media_session *session)
  49 {
  50         int                     i = 0;
  51         const gchar     *attr;
  52         GList           *codecs = NULL;
  53
  54         while ((attr = sipe_utils_nameval_find_instance(session->sdp_attrs, "a", i++))) {
  55                 gchar **tokens;
  56                 int id;
  57                 int clock_rate;
  58                 gchar *codec_name;
  59                 PurpleMediaCodec *codec;
  60
  61                 if (!g_str_has_prefix(attr, "rtpmap:"))
  62                         continue;
  63
  64                 tokens = g_strsplit_set(attr + 7, " /", 3);
  65
  66                 id = atoi(tokens[0]);
  67                 codec_name = tokens[1];
  68                 clock_rate = atoi(tokens[2]);
  69
  70                 codec = purple_media_codec_new(id, codec_name, PURPLE_MEDIA_AUDIO, clock_rate);
  71                 codecs = g_list_append(codecs, codec);
  72
  73                 g_strfreev(tokens);
  74         }
  75
  76         return codecs;
  77 }
  78
  79 static GList *
  80 sipe_media_parse_remote_candidates(const sipe_media_session *session)
  81 {
  82         PurpleMediaCandidate *candidate;
  83         GList *candidates = NULL;
  84
  85         gchar **tokens = g_strsplit(sipe_utils_nameval_find(session->sdp_attrs, "o"), " ", 5);
  86         gchar *ip = g_strdup(tokens[4]);
  87         guint port;
  88
  89         g_strfreev(tokens);
  90
  91         tokens = g_strsplit(sipe_utils_nameval_find(session->sdp_attrs, "m"), " ", 3);
  92         port = atoi(tokens[1]);
  93         g_strfreev(tokens);
  94
  95         candidate = purple_media_candidate_new("foundation?",
  96                                                                         PURPLE_MEDIA_COMPONENT_RTP,
  97                                                                         PURPLE_MEDIA_CANDIDATE_TYPE_HOST,
  98                                                                         PURPLE_MEDIA_NETWORK_PROTOCOL_UDP, ip, port);
  99         candidates = g_list_append(candidates, candidate);
 100
 101         candidate = purple_media_candidate_new("foundation?",
 102                                                                         PURPLE_MEDIA_COMPONENT_RTCP,
 103                                                                         PURPLE_MEDIA_CANDIDATE_TYPE_HOST,
 104                                                                         PURPLE_MEDIA_NETWORK_PROTOCOL_UDP, ip, port + 1);
 105         candidates = g_list_append(candidates, candidate);
 106
 107         return candidates;
 108 }
 109
 110 static void
 111 sipe_media_stream_info_cb(PurpleMedia *media, PurpleMediaInfoType type,
 112                                                         SIPE_UNUSED_PARAMETER gchar *sid, SIPE_UNUSED_PARAMETER gchar *name, SIPE_UNUSED_PARAMETER gboolean local, sipe_media_session *session)
 113 {
 114         PurpleAccount *account = purple_media_get_account(media);
 115
 116         if (type == PURPLE_MEDIA_INFO_ACCEPT) {
 117                 GList *codecs = sipe_media_parse_remote_codecs(session);
 118                 GList *candidates;
 119                 gchar *body;
 120
 121                 if (codecs) {
 122                         purple_media_set_remote_codecs(media, "sipe-voice", session->with, codecs);
 123
 124                         // TODO
 125                         purple_media_set_send_codec(media, "sipe-voice", codecs->data);
 126
 127                         for (; codecs; codecs = g_list_delete_link(codecs, codecs))
 128                                 g_object_unref(codecs->data);
 129                 }
 130
 131                 candidates = sipe_media_parse_remote_candidates(session);
 132                 if (candidates) {
 133                         purple_media_add_remote_candidates(media, "sipe-voice", session->with, candidates);
 134
 135                         for (; candidates; candidates = g_list_delete_link(candidates, candidates))
 136                                 g_object_unref(candidates->data);
 137                 }
 138
 139                 body = g_strdup_printf(
 140                         "v=0\r\n"
 141                         "o=- 0 0 IN IP4 %s\r\n"
 142                         "s=session\r\n"
 143                         "c=IN IP4 %s\r\n"
 144                         "b=CT:1000\r\n"
 145                         "t=0 0\r\n"
 146                         "m=audio 6804 RTP/AVP 97 111 101\r\n"
 147                         "k=base64:oPI/otNCy6dGWwyVOIPzcIX2iSij5RISzLhSd1WZxG0\r\n"
 148                         "a=rtpmap:97 red/8000\r\n"
 149                         "a=rtpmap:111 SIREN/16000\r\n"
 150                         "a=fmtp:111 bitrate=16000\r\n"
 151                         "a=rtpmap:101 telephone-event/8000\r\n"
 152                         "a=fmtp:101 0-16\r\n"
 153                         "a=encryption:optional\r\n",
 154                         "192.168.1.2", "192.168.1.2");
 155
 156                 send_sip_response(account->gc, session->invitation, 200, "OK", body);
 157                 sipmsg_free(session->invitation);
 158                 session->invitation = NULL;
 159                 g_free(body);
 160
 161         } else if (type == PURPLE_MEDIA_INFO_REJECT) {
 162                 send_sip_response(account->gc, session->invitation, 603, "Decline", NULL);
 163                 sipe_media_session_free(session);
 164         }
 165 }
 166
 167 static GSList *
 168 sipe_media_parse_sdp_frame(gchar *frame) {
 169         gchar   **lines = g_strsplit(frame, "\r\n", 0);
 170         GSList  *sdp_attrs = NULL;
 171
 172         gboolean result = sipe_utils_parse_lines(&sdp_attrs, lines, "=");
 173         g_strfreev(lines);
 174
 175         if (result == FALSE) {
 176                 sipe_utils_nameval_free(sdp_attrs);
 177                 return NULL;
 178         }
 179
 180         return sdp_attrs;
 181 }
 182
 183 void sipe_media_incoming_invite(PurpleAccount *account, struct sipmsg *msg)
 184 {
 185         struct sipe_account_data        *sip = account->gc->proto_data;
 186
 187         PurpleMediaManager                      *manager = purple_media_manager_get();
 188         PurpleMedia                                     *media;
 189
 190         sipe_media_session                      *session;
 191
 192         session = g_new0(sipe_media_session, 1);
 193         session->with = parse_from(sipmsg_find_header(msg,"From"));
 194         session->sdp_attrs = sipe_media_parse_sdp_frame(msg->body);
 195         session->invitation = msg;
 196
 197         msg->dont_free = TRUE;
 198
 199         media = purple_media_manager_create_media(manager, sip->account,
 200                                                         "fsrtpconference", session->with, FALSE);
 201
 202         g_signal_connect(G_OBJECT(media), "stream-info",
 203                                                 G_CALLBACK(sipe_media_stream_info_cb), session);
 204
 205         purple_media_add_stream(media, "sipe-voice", session->with, PURPLE_MEDIA_AUDIO,
 206                                                         FALSE, "nice", 0, NULL);
 207 }
 208
 209 /*
 210   Local Variables:
 211   mode: c
 212   c-file-style: "bsd"
 213   indent-tabs-mode: t
 214   tab-width: 8
 215   End:
 216 */