src/core/sipe-media.c

   1 /**
   2  * @file sipe-media.c
   3  *
   4  * pidgin-sipe
   5  *
   6  * Copyright (C) 2011-12 SIPE Project <http://sipe.sourceforge.net/>
   7  * Copyright (C) 2010 Jakub Adam <jakub.adam@ktknet.cz>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include "config.h"
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31
  32 #include <glib.h>
  33
  34 #include "sipe-common.h"
  35 #include "sipmsg.h"
  36 #include "sip-transport.h"
  37 #include "sipe-backend.h"
  38 #include "sdpmsg.h"
  39 #include "sipe-chat.h"
  40 #include "sipe-core.h"
  41 #include "sipe-core-private.h"
  42 #include "sipe-dialog.h"
  43 #include "sipe-media.h"
  44 #include "sipe-ocs2007.h"
  45 #include "sipe-session.h"
  46 #include "sipe-utils.h"
  47 #include "sipe-nls.h"
  48 #include "sipe-schedule.h"
  49 #include "sipe-xml.h"
  50
  51 struct sipe_media_call_private {
  52         struct sipe_media_call public;
  53
  54         /* private part starts here */
  55         struct sipe_core_private        *sipe_private;
  56         gchar                           *with;
  57
  58         struct sipmsg                   *invitation;
  59         SipeIceVersion                   ice_version;
  60         gboolean                         encryption_compatible;
  61
  62         struct sdpmsg                   *smsg;
  63         GSList                          *failed_media;
  64 };
  65 #define SIPE_MEDIA_CALL         ((struct sipe_media_call *) call_private)
  66 #define SIPE_MEDIA_CALL_PRIVATE ((struct sipe_media_call_private *) call)
  67
  68 static void sipe_media_codec_list_free(GList *codecs)
  69 {
  70         for (; codecs; codecs = g_list_delete_link(codecs, codecs))
  71                 sipe_backend_codec_free(codecs->data);
  72 }
  73
  74 static void sipe_media_candidate_list_free(GList *candidates)
  75 {
  76         for (; candidates; candidates = g_list_delete_link(candidates, candidates))
  77                 sipe_backend_candidate_free(candidates->data);
  78 }
  79
  80 static void
  81 sipe_media_call_free(struct sipe_media_call_private *call_private)
  82 {
  83         if (call_private) {
  84                 struct sip_session *session;
  85                 sipe_backend_media_free(call_private->public.backend_private);
  86
  87                 session = sipe_session_find_call(call_private->sipe_private,
  88                                                  call_private->with);
  89                 if (session)
  90                         sipe_session_remove(call_private->sipe_private, session);
  91
  92                 if (call_private->invitation)
  93                         sipmsg_free(call_private->invitation);
  94
  95                 sdpmsg_free(call_private->smsg);
  96                 g_slist_free_full(call_private->failed_media,
  97                                   (GDestroyNotify)sdpmedia_free);
  98                 g_free(call_private->with);
  99                 g_free(call_private);
 100         }
 101 }
 102
 103 static GSList *
 104 backend_candidates_to_sdpcandidate(GList *candidates)
 105 {
 106         GSList *result = NULL;
 107         GList *i;
 108
 109         for (i = candidates; i; i = i->next) {
 110                 struct sipe_backend_candidate *candidate = i->data;
 111                 struct sdpcandidate *c = g_new(struct sdpcandidate, 1);
 112
 113                 c->foundation = sipe_backend_candidate_get_foundation(candidate);
 114                 c->component = sipe_backend_candidate_get_component_type(candidate);
 115                 c->type = sipe_backend_candidate_get_type(candidate);
 116                 c->protocol = sipe_backend_candidate_get_protocol(candidate);
 117                 c->ip = sipe_backend_candidate_get_ip(candidate);
 118                 c->port = sipe_backend_candidate_get_port(candidate);
 119                 c->base_ip = sipe_backend_candidate_get_base_ip(candidate);
 120                 c->base_port = sipe_backend_candidate_get_base_port(candidate);
 121                 c->priority = sipe_backend_candidate_get_priority(candidate);
 122                 c->username = sipe_backend_candidate_get_username(candidate);
 123                 c->password = sipe_backend_candidate_get_password(candidate);
 124
 125                 result = g_slist_append(result, c);
 126         }
 127
 128         return result;
 129 }
 130
 131 static void
 132 get_stream_ip_and_ports(GSList *candidates,
 133                         gchar **ip, guint *rtp_port, guint *rtcp_port,
 134                         SipeCandidateType type)
 135 {
 136         *rtp_port = 0;
 137         *rtcp_port = 0;
 138
 139         for (; candidates; candidates = candidates->next) {
 140                 struct sdpcandidate *candidate = candidates->data;
 141
 142                 if (type == SIPE_CANDIDATE_TYPE_ANY || candidate->type == type) {
 143                         if (candidate->component == SIPE_COMPONENT_RTP) {
 144                                 *rtp_port = candidate->port;
 145                                 *ip = g_strdup(candidate->ip);
 146                         } else if (candidate->component == SIPE_COMPONENT_RTCP)
 147                                 *rtcp_port = candidate->port;
 148                 }
 149
 150                 if (*rtp_port != 0 && *rtcp_port != 0)
 151                         return;
 152         }
 153 }
 154
 155 static struct sdpmedia *
 156 backend_stream_to_sdpmedia(struct sipe_backend_media *backend_media,
 157                            struct sipe_backend_stream *backend_stream)
 158 {
 159         struct sdpmedia *media = g_new0(struct sdpmedia, 1);
 160         GList *codecs = sipe_backend_get_local_codecs(backend_media,
 161                                                       backend_stream);
 162         guint rtcp_port = 0;
 163         SipeMediaType type;
 164         GSList *attributes = NULL;
 165         GList *candidates;
 166         GList *i;
 167
 168         media->name = g_strdup(sipe_backend_stream_get_id(backend_stream));
 169
 170         if (sipe_strequal(media->name, "audio"))
 171                 type = SIPE_MEDIA_AUDIO;
 172         else if (sipe_strequal(media->name, "video"))
 173                 type = SIPE_MEDIA_VIDEO;
 174         else {
 175                 // TODO: incompatible media, should not happen here
 176                 g_free(media->name);
 177                 g_free(media);
 178                 sipe_media_codec_list_free(codecs);
 179                 return(NULL);
 180         }
 181
 182         // Process codecs
 183         for (i = codecs; i; i = i->next) {
 184                 struct sipe_backend_codec *codec = i->data;
 185                 struct sdpcodec *c = g_new0(struct sdpcodec, 1);
 186                 GList *params;
 187
 188                 c->id = sipe_backend_codec_get_id(codec);
 189                 c->name = sipe_backend_codec_get_name(codec);
 190                 c->clock_rate = sipe_backend_codec_get_clock_rate(codec);
 191                 c->type = type;
 192
 193                 params = sipe_backend_codec_get_optional_parameters(codec);
 194                 for (; params; params = params->next) {
 195                         struct sipnameval *param = params->data;
 196                         struct sipnameval *copy = g_new0(struct sipnameval, 1);
 197
 198                         copy->name = g_strdup(param->name);
 199                         copy->value = g_strdup(param->value);
 200
 201                         c->parameters = g_slist_append(c->parameters, copy);
 202                 }
 203
 204                 media->codecs = g_slist_append(media->codecs, c);
 205         }
 206
 207         sipe_media_codec_list_free(codecs);
 208
 209         // Process local candidates
 210         // If we have established candidate pairs, send them in SDP response.
 211         // Otherwise send all available local candidates.
 212         candidates = sipe_backend_media_get_active_local_candidates(backend_media,
 213                                                                     backend_stream);
 214         if (!candidates)
 215                 candidates = sipe_backend_get_local_candidates(backend_media,
 216                                                                backend_stream);
 217
 218         media->candidates = backend_candidates_to_sdpcandidate(candidates);
 219
 220         sipe_media_candidate_list_free(candidates);
 221
 222         get_stream_ip_and_ports(media->candidates, &media->ip, &media->port,
 223                                 &rtcp_port, SIPE_CANDIDATE_TYPE_HOST);
 224         // No usable HOST candidates, use any candidate
 225         if (media->ip == NULL && media->candidates) {
 226                 get_stream_ip_and_ports(media->candidates, &media->ip, &media->port,
 227                                         &rtcp_port, SIPE_CANDIDATE_TYPE_ANY);
 228         }
 229
 230         if (sipe_backend_stream_is_held(backend_stream))
 231                 attributes = sipe_utils_nameval_add(attributes, "inactive", "");
 232
 233         if (rtcp_port) {
 234                 gchar *tmp = g_strdup_printf("%u", rtcp_port);
 235                 attributes  = sipe_utils_nameval_add(attributes, "rtcp", tmp);
 236                 g_free(tmp);
 237         }
 238
 239         attributes = sipe_utils_nameval_add(attributes, "encryption", "rejected");
 240
 241         media->attributes = attributes;
 242
 243         // Process remote candidates
 244         candidates = sipe_backend_media_get_active_remote_candidates(backend_media,
 245                                                                      backend_stream);
 246         media->remote_candidates = backend_candidates_to_sdpcandidate(candidates);
 247         sipe_media_candidate_list_free(candidates);
 248
 249         return media;
 250 }
 251
 252 static struct sdpmsg *
 253 sipe_media_to_sdpmsg(struct sipe_media_call_private *call_private)
 254 {
 255         struct sipe_backend_media *backend_media = call_private->public.backend_private;
 256         struct sdpmsg *msg = g_new0(struct sdpmsg, 1);
 257         GSList *streams = sipe_backend_media_get_streams(backend_media);
 258
 259         for (; streams; streams = streams->next) {
 260                 struct sdpmedia *media = backend_stream_to_sdpmedia(backend_media, streams->data);
 261                 if (media) {
 262                         msg->media = g_slist_append(msg->media, media);
 263
 264                         if (msg->ip == NULL)
 265                                 msg->ip = g_strdup(media->ip);
 266                 }
 267         }
 268
 269         msg->media = g_slist_concat(msg->media, call_private->failed_media);
 270         call_private->failed_media = NULL;
 271
 272         msg->ice_version = call_private->ice_version;
 273
 274         return msg;
 275 }
 276
 277 static void
 278 sipe_invite_call(struct sipe_core_private *sipe_private, TransCallback tc)
 279 {
 280         gchar *hdr;
 281         gchar *contact;
 282         gchar *body;
 283         struct sipe_media_call_private *call_private = sipe_private->media_call;
 284         struct sip_session *session;
 285         struct sip_dialog *dialog;
 286         struct sdpmsg *msg;
 287         gboolean add_2007_fallback = FALSE;
 288
 289         session = sipe_session_find_call(sipe_private, call_private->with);
 290         dialog = session->dialogs->data;
 291         add_2007_fallback = dialog->cseq == 0 &&
 292                 call_private->ice_version == SIPE_ICE_RFC_5245 &&
 293                 !sipe_strequal(call_private->with, sipe_private->test_call_bot_uri);
 294
 295         contact = get_contact(sipe_private);
 296         hdr = g_strdup_printf(
 297                 "ms-keep-alive: UAC;hop-hop=yes\r\n"
 298                 "Contact: %s\r\n"
 299                 "Content-Type: %s\r\n",
 300                 contact,
 301                 add_2007_fallback ?
 302                           "multipart/alternative;boundary=\"----=_NextPart_000_001E_01CB4397.0B5EB570\""
 303                         : "application/sdp");
 304         g_free(contact);
 305
 306         msg = sipe_media_to_sdpmsg(call_private);
 307         body = sdpmsg_to_string(msg);
 308
 309         if (add_2007_fallback) {
 310                 gchar *tmp;
 311                 tmp = g_strdup_printf(
 312                         "------=_NextPart_000_001E_01CB4397.0B5EB570\r\n"
 313                         "Content-Type: application/sdp\r\n"
 314                         "Content-Transfer-Encoding: 7bit\r\n"
 315                         "Content-Disposition: session; handling=optional; ms-proxy-2007fallback\r\n"
 316                         "\r\n"
 317                         "o=- 0 0 IN IP4 %s\r\n"
 318                         "s=session\r\n"
 319                         "c=IN IP4 %s\r\n"
 320                         "m=audio 0 RTP/AVP\r\n"
 321                         "\r\n"
 322                         "------=_NextPart_000_001E_01CB4397.0B5EB570\r\n"
 323                         "Content-Type: application/sdp\r\n"
 324                         "Content-Transfer-Encoding: 7bit\r\n"
 325                         "Content-Disposition: session; handling=optional\r\n"
 326                         "\r\n"
 327                         "%s"
 328                         "\r\n"
 329                         "------=_NextPart_000_001E_01CB4397.0B5EB570--\r\n",
 330                         msg->ip, msg->ip, body);
 331                 g_free(body);
 332                 body = tmp;
 333         }
 334
 335         sdpmsg_free(msg);
 336
 337         dialog->outgoing_invite = sip_transport_invite(sipe_private,
 338                                                        hdr,
 339                                                        body,
 340                                                        dialog,
 341                                                        tc);
 342
 343         g_free(body);
 344         g_free(hdr);
 345 }
 346
 347 static struct sip_dialog *
 348 sipe_media_dialog_init(struct sip_session* session, struct sipmsg *msg)
 349 {
 350         gchar *newTag = gentag();
 351         const gchar *oldHeader;
 352         gchar *newHeader;
 353         struct sip_dialog *dialog;
 354
 355         oldHeader = sipmsg_find_header(msg, "To");
 356         newHeader = g_strdup_printf("%s;tag=%s", oldHeader, newTag);
 357         sipmsg_remove_header_now(msg, "To");
 358         sipmsg_add_header_now(msg, "To", newHeader);
 359         g_free(newHeader);
 360
 361         dialog = sipe_dialog_add(session);
 362         dialog->callid = g_strdup(sipmsg_find_header(msg, "Call-ID"));
 363         dialog->with = parse_from(sipmsg_find_header(msg, "From"));
 364         sipe_dialog_parse(dialog, msg, FALSE);
 365
 366         return dialog;
 367 }
 368
 369 static void
 370 send_response_with_session_description(struct sipe_media_call_private *call_private, int code, gchar *text)
 371 {
 372         struct sdpmsg *msg = sipe_media_to_sdpmsg(call_private);
 373         gchar *body = sdpmsg_to_string(msg);
 374         sdpmsg_free(msg);
 375         sipmsg_add_header(call_private->invitation, "Content-Type", "application/sdp");
 376         sip_transport_response(call_private->sipe_private, call_private->invitation, code, text, body);
 377         g_free(body);
 378 }
 379
 380 static gboolean
 381 encryption_levels_compatible(struct sdpmsg *msg)
 382 {
 383         GSList *i;
 384
 385         for (i = msg->media; i; i = i->next) {
 386                 const gchar *enc_level;
 387                 struct sdpmedia *m = i->data;
 388
 389                 enc_level = sipe_utils_nameval_find(m->attributes, "encryption");
 390
 391                 // Decline call if peer requires encryption as we don't support it yet.
 392                 if (sipe_strequal(enc_level, "required"))
 393                         return FALSE;
 394         }
 395
 396         return TRUE;
 397 }
 398
 399 static gboolean
 400 process_invite_call_response(struct sipe_core_private *sipe_private,
 401                                                                    struct sipmsg *msg,
 402                                                                    struct transaction *trans);
 403
 404 static gboolean
 405 update_remote_media(struct sipe_media_call_private* call_private,
 406                     struct sdpmedia *media)
 407 {
 408         struct sipe_backend_media *backend_media = SIPE_MEDIA_CALL->backend_private;
 409         struct sipe_backend_stream *backend_stream;
 410         GList *backend_candidates = NULL;
 411         GList *backend_codecs = NULL;
 412         GSList *i;
 413         gboolean result = TRUE;
 414
 415         backend_stream = sipe_backend_media_get_stream_by_id(backend_media,
 416                                                              media->name);
 417         if (media->port == 0) {
 418                 if (backend_stream)
 419                         sipe_backend_media_remove_stream(backend_media, backend_stream);
 420                 return TRUE;
 421         }
 422
 423         if (!backend_stream)
 424                 return FALSE;
 425
 426         for (i = media->codecs; i; i = i->next) {
 427                 struct sdpcodec *c = i->data;
 428                 struct sipe_backend_codec *codec;
 429                 GSList *j;
 430
 431                 codec = sipe_backend_codec_new(c->id,
 432                                                c->name,
 433                                                c->type,
 434                                                c->clock_rate);
 435
 436                 for (j = c->parameters; j; j = j->next) {
 437                         struct sipnameval *attr = j->data;
 438
 439                         sipe_backend_codec_add_optional_parameter(codec,
 440                                                                   attr->name,
 441                                                                   attr->value);
 442                 }
 443
 444                 backend_codecs = g_list_append(backend_codecs, codec);
 445         }
 446
 447         result = sipe_backend_set_remote_codecs(backend_media,
 448                                                 backend_stream,
 449                                                 backend_codecs);
 450         sipe_media_codec_list_free(backend_codecs);
 451
 452         if (result == FALSE) {
 453                 sipe_backend_media_remove_stream(backend_media, backend_stream);
 454                 return FALSE;
 455         }
 456
 457         for (i = media->candidates; i; i = i->next) {
 458                 struct sdpcandidate *c = i->data;
 459                 struct sipe_backend_candidate *candidate;
 460                 candidate = sipe_backend_candidate_new(c->foundation,
 461                                                        c->component,
 462                                                        c->type,
 463                                                        c->protocol,
 464                                                        c->ip,
 465                                                        c->port,
 466                                                        c->username,
 467                                                        c->password);
 468                 sipe_backend_candidate_set_priority(candidate, c->priority);
 469
 470                 backend_candidates = g_list_append(backend_candidates, candidate);
 471         }
 472
 473         sipe_backend_media_add_remote_candidates(backend_media,
 474                                                  backend_stream,
 475                                                  backend_candidates);
 476         sipe_media_candidate_list_free(backend_candidates);
 477
 478         if (sipe_utils_nameval_find(media->attributes, "inactive")) {
 479                 sipe_backend_stream_hold(backend_media, backend_stream, FALSE);
 480         } else if (sipe_backend_stream_is_held(backend_stream)) {
 481                 sipe_backend_stream_unhold(backend_media, backend_stream, FALSE);
 482         }
 483
 484         return TRUE;
 485 }
 486
 487 static void
 488 apply_remote_message(struct sipe_media_call_private* call_private,
 489                      struct sdpmsg* msg)
 490 {
 491         GSList *i;
 492
 493         g_slist_free_full(call_private->failed_media, (GDestroyNotify)sdpmedia_free);
 494         call_private->failed_media = NULL;
 495
 496         for (i = msg->media; i; i = i->next) {
 497                 struct sdpmedia *media = i->data;
 498                 if (!update_remote_media(call_private, media)) {
 499                         media->port = 0;
 500                         call_private->failed_media =
 501                                 g_slist_append(call_private->failed_media, media);
 502                 }
 503         }
 504
 505         /* We need to keep failed medias until response is sent, remove them
 506          * from sdpmsg that is to be freed. */
 507         for (i = call_private->failed_media; i; i = i->next) {
 508                 msg->media = g_slist_remove(msg->media, i->data);
 509         }
 510
 511         call_private->encryption_compatible = encryption_levels_compatible(msg);
 512 }
 513
 514 // Sends an invite response when the call is accepted and local candidates were
 515 // prepared, otherwise does nothing. If error response is sent, call_private is
 516 // disposed before function returns. Returns true when response was sent.
 517 static gboolean
 518 send_invite_response_if_ready(struct sipe_media_call_private *call_private)
 519 {
 520         struct sipe_backend_media *backend_media;
 521
 522         backend_media = call_private->public.backend_private;
 523
 524         if (!sipe_backend_media_accepted(backend_media) ||
 525             !sipe_backend_candidates_prepared(backend_media))
 526                 return FALSE;
 527
 528         if (!call_private->encryption_compatible) {
 529                 struct sipe_core_private *sipe_private = call_private->sipe_private;
 530
 531                 sipmsg_add_header(call_private->invitation, "Warning",
 532                         "308 lcs.microsoft.com \"Encryption Levels not compatible\"");
 533                 sip_transport_response(sipe_private,
 534                         call_private->invitation,
 535                         488, "Encryption Levels not compatible",
 536                         NULL);
 537                 sipe_backend_media_reject(backend_media, FALSE);
 538                 sipe_backend_notify_error(SIPE_CORE_PUBLIC,
 539                                           _("Unable to establish a call"),
 540                                           _("Encryption settings of peer are incompatible with ours."));
 541         } else {
 542                 send_response_with_session_description(call_private, 200, "OK");
 543         }
 544
 545         return TRUE;
 546 }
 547
 548 static void
 549 candidates_prepared_cb(struct sipe_media_call *call,
 550                        struct sipe_backend_stream *stream)
 551 {
 552         struct sipe_media_call_private *call_private = SIPE_MEDIA_CALL_PRIVATE;
 553         struct sipe_backend_media *backend_private = call->backend_private;
 554
 555         if (sipe_backend_media_is_initiator(backend_private, stream)) {
 556                 sipe_invite_call(call_private->sipe_private,
 557                                  process_invite_call_response);
 558         } else {
 559                 struct sdpmsg *smsg = call_private->smsg;
 560                 call_private->smsg = NULL;
 561
 562                 apply_remote_message(call_private, smsg);
 563                 send_invite_response_if_ready(call_private);
 564                 sdpmsg_free(smsg);
 565         }
 566 }
 567
 568 static void phone_state_publish(struct sipe_core_private *sipe_private)
 569 {
 570         if (SIPE_CORE_PRIVATE_FLAG_IS(OCS2007)) {
 571                 sipe_ocs2007_phone_state_publish(sipe_private);
 572         } else {
 573                 // TODO: OCS 2005 support. Is anyone still using it at all?
 574         }
 575 }
 576
 577 static void
 578 media_end_cb(struct sipe_media_call *call)
 579 {
 580         g_return_if_fail(call);
 581
 582         SIPE_MEDIA_CALL_PRIVATE->sipe_private->media_call = NULL;
 583         phone_state_publish(SIPE_MEDIA_CALL_PRIVATE->sipe_private);
 584         sipe_media_call_free(SIPE_MEDIA_CALL_PRIVATE);
 585 }
 586
 587 static void
 588 call_accept_cb(struct sipe_media_call *call, gboolean local)
 589 {
 590         if (local) {
 591                 send_invite_response_if_ready(SIPE_MEDIA_CALL_PRIVATE);
 592         }
 593         phone_state_publish(SIPE_MEDIA_CALL_PRIVATE->sipe_private);
 594 }
 595
 596 static void
 597 call_reject_cb(struct sipe_media_call *call, gboolean local)
 598 {
 599         if (local) {
 600                 struct sipe_media_call_private *call_private = SIPE_MEDIA_CALL_PRIVATE;
 601                 sip_transport_response(call_private->sipe_private,
 602                                        call_private->invitation,
 603                                        603, "Decline", NULL);
 604         }
 605 }
 606
 607 static gboolean
 608 sipe_media_send_ack(struct sipe_core_private *sipe_private, struct sipmsg *msg,
 609                                         struct transaction *trans);
 610
 611 static void call_hold_cb(struct sipe_media_call *call,
 612                          gboolean local,
 613                          SIPE_UNUSED_PARAMETER gboolean state)
 614 {
 615         if (local)
 616                 sipe_invite_call(SIPE_MEDIA_CALL_PRIVATE->sipe_private,
 617                                  sipe_media_send_ack);
 618 }
 619
 620 static void call_hangup_cb(struct sipe_media_call *call, gboolean local)
 621 {
 622         if (local) {
 623                 struct sipe_media_call_private *call_private = SIPE_MEDIA_CALL_PRIVATE;
 624                 struct sip_session *session;
 625                 session = sipe_session_find_call(call_private->sipe_private,
 626                                                  call_private->with);
 627
 628                 if (session) {
 629                         sipe_session_close(call_private->sipe_private, session);
 630                 }
 631         }
 632 }
 633
 634 static void
 635 error_cb(struct sipe_media_call *call, gchar *message)
 636 {
 637         struct sipe_media_call_private *call_private = SIPE_MEDIA_CALL_PRIVATE;
 638         struct sipe_core_private *sipe_private = call_private->sipe_private;
 639         gboolean initiator = sipe_backend_media_is_initiator(call->backend_private, NULL);
 640         gboolean accepted = sipe_backend_media_accepted(call->backend_private);
 641
 642         gchar *title = g_strdup_printf("Call with %s failed", call_private->with);
 643         sipe_backend_notify_error(SIPE_CORE_PUBLIC, title, message);
 644         g_free(title);
 645
 646         if (!initiator && !accepted) {
 647                 sip_transport_response(sipe_private,
 648                                        call_private->invitation,
 649                                        488, "Not Acceptable Here", NULL);
 650         }
 651
 652         sipe_backend_media_hangup(call->backend_private, initiator || accepted);
 653 }
 654
 655 static struct sipe_media_call_private *
 656 sipe_media_call_new(struct sipe_core_private *sipe_private,
 657                     const gchar* with, gboolean initiator, SipeIceVersion ice_version)
 658 {
 659         struct sipe_media_call_private *call_private = g_new0(struct sipe_media_call_private, 1);
 660         gchar *cname;
 661
 662         call_private->sipe_private = sipe_private;
 663
 664         cname = g_strdup(sipe_private->contact + 1);
 665         cname[strlen(cname) - 1] = '\0';
 666
 667         call_private->public.backend_private = sipe_backend_media_new(SIPE_CORE_PUBLIC,
 668                                                                       SIPE_MEDIA_CALL,
 669                                                                       with,
 670                                                                       initiator);
 671         sipe_backend_media_set_cname(call_private->public.backend_private, cname);
 672
 673         call_private->ice_version = ice_version;
 674         call_private->encryption_compatible = TRUE;
 675
 676         call_private->public.candidates_prepared_cb = candidates_prepared_cb;
 677         call_private->public.media_end_cb           = media_end_cb;
 678         call_private->public.call_accept_cb         = call_accept_cb;
 679         call_private->public.call_reject_cb         = call_reject_cb;
 680         call_private->public.call_hold_cb           = call_hold_cb;
 681         call_private->public.call_hangup_cb         = call_hangup_cb;
 682         call_private->public.error_cb               = error_cb;
 683
 684         g_free(cname);
 685
 686         return call_private;
 687 }
 688
 689 void sipe_media_hangup(struct sipe_media_call_private *call_private)
 690 {
 691         if (call_private) {
 692                 sipe_backend_media_hangup(call_private->public.backend_private,
 693                                           FALSE);
 694         }
 695 }
 696
 697 static void
 698 sipe_media_initiate_call(struct sipe_core_private *sipe_private,
 699                          const char *with, SipeIceVersion ice_version,
 700                          gboolean with_video)
 701 {
 702         struct sipe_media_call_private *call_private;
 703         struct sipe_backend_media *backend_media;
 704         struct sipe_backend_media_relays *backend_media_relays;
 705         struct sip_session *session;
 706         struct sip_dialog *dialog;
 707
 708         if (sipe_private->media_call)
 709                 return;
 710
 711         call_private = sipe_media_call_new(sipe_private, with, TRUE, ice_version);
 712
 713         session = sipe_session_add_call(sipe_private, with);
 714         dialog = sipe_dialog_add(session);
 715         dialog->callid = gencallid();
 716         dialog->with = g_strdup(session->with);
 717         dialog->ourtag = gentag();
 718
 719         call_private->with = g_strdup(session->with);
 720
 721         backend_media = call_private->public.backend_private;
 722
 723         backend_media_relays =
 724                 sipe_backend_media_relays_convert(sipe_private->media_relays,
 725                                                   sipe_private->media_relay_username,
 726                                                   sipe_private->media_relay_password);
 727
 728         if (!sipe_backend_media_add_stream(backend_media,
 729                                            "audio", with, SIPE_MEDIA_AUDIO,
 730                                            call_private->ice_version, TRUE,
 731                                            backend_media_relays)) {
 732                 sipe_backend_notify_error(SIPE_CORE_PUBLIC,
 733                                           _("Error occured"),
 734                                           _("Error creating audio stream"));
 735                 sipe_media_call_free(call_private);
 736                 sipe_backend_media_relays_free(backend_media_relays);
 737                 return;
 738         }
 739
 740         if (   with_video
 741             && !sipe_backend_media_add_stream(backend_media,
 742                                               "video", with, SIPE_MEDIA_VIDEO,
 743                                               call_private->ice_version, TRUE,
 744                                               backend_media_relays)) {
 745                 sipe_backend_notify_error(SIPE_CORE_PUBLIC,
 746                                           _("Error occured"),
 747                                           _("Error creating video stream"));
 748                 sipe_media_call_free(call_private);
 749                 sipe_backend_media_relays_free(backend_media_relays);
 750                 return;
 751         }
 752
 753         sipe_private->media_call = call_private;
 754
 755         sipe_backend_media_relays_free(backend_media_relays);
 756
 757         // Processing continues in candidates_prepared_cb
 758 }
 759
 760 void
 761 sipe_core_media_initiate_call(struct sipe_core_public *sipe_public,
 762                               const char *with,
 763                               gboolean with_video)
 764 {
 765         sipe_media_initiate_call(SIPE_CORE_PRIVATE, with,
 766                                  SIPE_ICE_RFC_5245, with_video);
 767 }
 768
 769 void sipe_core_media_connect_conference(struct sipe_core_public *sipe_public,
 770                                         struct sipe_chat_session *chat_session)
 771 {
 772         struct sipe_core_private *sipe_private = SIPE_CORE_PRIVATE;
 773         struct sipe_backend_media_relays *backend_media_relays;
 774         struct sip_session *session;
 775         struct sip_dialog *dialog;
 776         gchar **parts;
 777         gchar *av_uri;
 778
 779         session = sipe_session_find_chat(sipe_private, chat_session);
 780
 781         if (sipe_private->media_call || !session)
 782                 return;
 783
 784         session->is_call = TRUE;
 785
 786         parts = g_strsplit(chat_session->id, "app:conf:focus:", 2);
 787         av_uri = g_strjoinv("app:conf:audio-video:", parts);
 788         g_strfreev(parts);
 789
 790         sipe_private->media_call = sipe_media_call_new(sipe_private, av_uri,
 791                                                        TRUE, SIPE_ICE_DRAFT_6);
 792
 793         session = sipe_session_add_call(sipe_private, av_uri);
 794         dialog = sipe_dialog_add(session);
 795         dialog->callid = gencallid();
 796         dialog->with = g_strdup(session->with);
 797         dialog->ourtag = gentag();
 798
 799         g_free(av_uri);
 800
 801         sipe_private->media_call->with = g_strdup(session->with);
 802
 803         backend_media_relays =
 804                 sipe_backend_media_relays_convert(sipe_private->media_relays,
 805                                                   sipe_private->media_relay_username,
 806                                                   sipe_private->media_relay_password);
 807
 808         if (!sipe_backend_media_add_stream(sipe_private->media_call->public.backend_private,
 809                                            "audio", dialog->with,
 810                                            SIPE_MEDIA_AUDIO,
 811                                            sipe_private->media_call->ice_version,
 812                                            TRUE, backend_media_relays)) {
 813                 sipe_backend_notify_error(sipe_public,
 814                                           _("Error occured"),
 815                                           _("Error creating audio stream"));
 816                 sipe_media_call_free(sipe_private->media_call);
 817                 sipe_private->media_call = NULL;
 818         }
 819
 820         sipe_backend_media_relays_free(backend_media_relays);
 821
 822         // Processing continues in candidates_prepared_cb
 823 }
 824
 825 gboolean sipe_core_media_in_call(struct sipe_core_public *sipe_public)
 826 {
 827         if (sipe_public) {
 828                 return SIPE_CORE_PRIVATE->media_call != NULL;
 829         }
 830         return FALSE;
 831 }
 832
 833 void sipe_core_media_test_call(struct sipe_core_public *sipe_public)
 834 {
 835         struct sipe_core_private *sipe_private = SIPE_CORE_PRIVATE;
 836         if (!sipe_private->test_call_bot_uri) {
 837                 sipe_backend_notify_error(sipe_public,
 838                                           _("Unable to establish a call"),
 839                                           _("Audio Test Service is not available."));
 840                 return;
 841         }
 842
 843         sipe_core_media_initiate_call(sipe_public,
 844                                       sipe_private->test_call_bot_uri, FALSE);
 845 }
 846
 847 void
 848 process_incoming_invite_call(struct sipe_core_private *sipe_private,
 849                              struct sipmsg *msg)
 850 {
 851         struct sipe_media_call_private *call_private = sipe_private->media_call;
 852         struct sipe_backend_media *backend_media;
 853         struct sipe_backend_media_relays *backend_media_relays = NULL;
 854         struct sdpmsg *smsg;
 855         gboolean has_new_media = FALSE;
 856         GSList *i;
 857
 858         if (call_private && !is_media_session_msg(call_private, msg)) {
 859                 sip_transport_response(sipe_private, msg, 486, "Busy Here", NULL);
 860                 return;
 861         }
 862
 863         smsg = sdpmsg_parse_msg(msg->body);
 864         if (!smsg) {
 865                 sip_transport_response(sipe_private, msg,
 866                                        488, "Not Acceptable Here", NULL);
 867                 sipe_media_hangup(call_private);
 868                 return;
 869         }
 870
 871         if (!call_private) {
 872                 gchar *with = parse_from(sipmsg_find_header(msg, "From"));
 873                 struct sip_session *session;
 874
 875                 call_private = sipe_media_call_new(sipe_private, with, FALSE, smsg->ice_version);
 876                 session = sipe_session_add_call(sipe_private, with);
 877                 sipe_media_dialog_init(session, msg);
 878
 879                 call_private->with = g_strdup(session->with);
 880                 sipe_private->media_call = call_private;
 881                 g_free(with);
 882         }
 883
 884         backend_media = call_private->public.backend_private;
 885
 886         if (call_private->invitation)
 887                 sipmsg_free(call_private->invitation);
 888         call_private->invitation = sipmsg_copy(msg);
 889
 890         if (smsg->media)
 891                 backend_media_relays = sipe_backend_media_relays_convert(
 892                                                 sipe_private->media_relays,
 893                                                 sipe_private->media_relay_username,
 894                                                 sipe_private->media_relay_password);
 895
 896         // Create any new media streams
 897         for (i = smsg->media; i; i = i->next) {
 898                 struct sdpmedia *media = i->data;
 899                 gchar *id = media->name;
 900                 SipeMediaType type;
 901
 902                 if (   media->port != 0
 903                     && !sipe_backend_media_get_stream_by_id(backend_media, id)) {
 904                         gchar *with;
 905
 906                         if (sipe_strequal(id, "audio"))
 907                                 type = SIPE_MEDIA_AUDIO;
 908                         else if (sipe_strequal(id, "video"))
 909                                 type = SIPE_MEDIA_VIDEO;
 910                         else
 911                                 continue;
 912
 913                         with = parse_from(sipmsg_find_header(msg, "From"));
 914                         sipe_backend_media_add_stream(backend_media, id, with,
 915                                                       type,
 916                                                       smsg->ice_version,
 917                                                       FALSE,
 918                                                       backend_media_relays);
 919                         has_new_media = TRUE;
 920                         g_free(with);
 921                 }
 922         }
 923
 924         sipe_backend_media_relays_free(backend_media_relays);
 925
 926         if (has_new_media) {
 927                 sdpmsg_free(call_private->smsg);
 928                 call_private->smsg = smsg;
 929                 sip_transport_response(sipe_private, call_private->invitation,
 930                                        180, "Ringing", NULL);
 931                 // Processing continues in candidates_prepared_cb
 932         } else {
 933                 apply_remote_message(call_private, smsg);
 934                 send_response_with_session_description(call_private, 200, "OK");
 935
 936                 sdpmsg_free(smsg);
 937         }
 938 }
 939
 940 void process_incoming_cancel_call(struct sipe_core_private *sipe_private,
 941                                   struct sipmsg *msg)
 942 {
 943         struct sipe_media_call_private *call_private = sipe_private->media_call;
 944
 945         // We respond to the CANCEL request with 200 OK response and
 946         // with 487 Request Terminated to the remote INVITE in progress.
 947         sip_transport_response(sipe_private, msg, 200, "OK", NULL);
 948
 949         if (call_private->invitation) {
 950                 sip_transport_response(sipe_private, call_private->invitation,
 951                                        487, "Request Terminated", NULL);
 952         }
 953
 954         sipe_media_hangup(call_private);
 955 }
 956
 957 static gboolean
 958 sipe_media_send_ack(struct sipe_core_private *sipe_private,
 959                     struct sipmsg *msg,
 960                     struct transaction *trans)
 961 {
 962         struct sipe_media_call_private *call_private = sipe_private->media_call;
 963         struct sip_session *session;
 964         struct sip_dialog *dialog;
 965         int tmp_cseq;
 966
 967         if (!is_media_session_msg(call_private, msg))
 968                 return FALSE;
 969
 970         session = sipe_session_find_call(sipe_private, call_private->with);
 971         dialog = session->dialogs->data;
 972         if (!dialog)
 973                 return FALSE;
 974
 975         tmp_cseq = dialog->cseq;
 976
 977         dialog->cseq = sip_transaction_cseq(trans) - 1;
 978         sip_transport_ack(sipe_private, dialog);
 979         dialog->cseq = tmp_cseq;
 980
 981         dialog->outgoing_invite = NULL;
 982
 983         return TRUE;
 984 }
 985
 986 static gboolean
 987 sipe_media_send_final_ack(struct sipe_core_private *sipe_private,
 988                           struct sipmsg *msg,
 989                           struct transaction *trans)
 990 {
 991         if (!sipe_media_send_ack(sipe_private, msg, trans))
 992                 return FALSE;
 993
 994         sipe_backend_media_accept(sipe_private->media_call->public.backend_private,
 995                                   FALSE);
 996
 997         return TRUE;
 998 }
 999
1000 static void
1001 reinvite_on_candidate_pair_cb(struct sipe_core_public *sipe_public)
1002 {
1003         struct sipe_core_private *sipe_private = SIPE_CORE_PRIVATE;
1004         struct sipe_media_call_private *media_call = sipe_private->media_call;
1005         struct sipe_backend_media *backend_media;
1006         GSList *streams;
1007
1008         if (!media_call)
1009                 return;
1010
1011         backend_media = media_call->public.backend_private;
1012         streams = sipe_backend_media_get_streams(backend_media);
1013
1014         for (; streams; streams = streams->next) {
1015                 struct sipe_backend_stream *s = streams->data;
1016                 GList *remote_candidates =  sipe_backend_media_get_active_remote_candidates(backend_media, s);
1017                 guint components = g_list_length(remote_candidates);
1018
1019                 sipe_media_candidate_list_free(remote_candidates);
1020
1021                 // We must have candidates for both (RTP + RTCP) components ready
1022                 if (components < 2) {
1023                         sipe_schedule_mseconds(sipe_private,
1024                                                "<+media-reinvite-on-candidate-pair>",
1025                                                NULL,
1026                                                500,
1027                                                (sipe_schedule_action) reinvite_on_candidate_pair_cb,
1028                                                NULL);
1029                         return;
1030                 }
1031         }
1032
1033         sipe_invite_call(sipe_private, sipe_media_send_final_ack);
1034 }
1035
1036 static gboolean
1037 process_invite_call_response(struct sipe_core_private *sipe_private,
1038                              struct sipmsg *msg,
1039                              struct transaction *trans)
1040 {
1041         const gchar *with;
1042         struct sipe_media_call_private *call_private = sipe_private->media_call;
1043         struct sipe_backend_media *backend_private;
1044         struct sip_session *session;
1045         struct sip_dialog *dialog;
1046         struct sdpmsg *smsg;
1047
1048         if (!is_media_session_msg(call_private, msg))
1049                 return FALSE;
1050
1051         session = sipe_session_find_call(sipe_private, call_private->with);
1052         dialog = session->dialogs->data;
1053
1054         backend_private = call_private->public.backend_private;
1055         with = dialog->with;
1056
1057         dialog->outgoing_invite = NULL;
1058
1059         if (msg->response >= 400) {
1060                 // Call rejected by remote peer or an error occurred
1061                 const gchar *title;
1062                 GString *desc = g_string_new("");
1063                 gboolean append_responsestr = FALSE;
1064
1065                 switch (msg->response) {
1066                         case 480: {
1067                                 title = _("User unavailable");
1068
1069                                 if (sipmsg_parse_warning(msg, NULL) == 391) {
1070                                         g_string_append_printf(desc, _("%s does not want to be disturbed"), with);
1071                                 } else
1072                                         g_string_append_printf(desc, _("User %s is not available"), with);
1073                                 break;
1074                         }
1075                         case 603:
1076                         case 605:
1077                                 title = _("Call rejected");
1078                                 g_string_append_printf(desc, _("User %s rejected call"), with);
1079                                 break;
1080                         case 488: {
1081                                 /* Check for incompatible encryption levels error.
1082                                  *
1083                                  * MS Lync 2010:
1084                                  * 488 Not Acceptable Here
1085                                  * ms-client-diagnostics: 52017;reason="Encryption levels dont match"
1086                                  *
1087                                  * older clients (and SIPE itself):
1088                                  * 488 Encryption Levels not compatible
1089                                  */
1090                                 const gchar *ms_diag = sipmsg_find_header(msg, "ms-client-diagnostics");
1091
1092                                 if (sipe_strequal(msg->responsestr, "Encryption Levels not compatible") ||
1093                                     (ms_diag && g_str_has_prefix(ms_diag, "52017;"))) {
1094                                         title = _("Unable to establish a call");
1095                                         g_string_append(desc, _("Encryption settings of peer are incompatible with ours."));
1096                                         break;
1097                                 }
1098
1099                                 if (call_private->ice_version == SIPE_ICE_RFC_5245 &&
1100                                     sip_transaction_cseq(trans) == 1) {
1101                                         gchar *with = g_strdup(call_private->with);
1102                                         gboolean with_video = sipe_backend_media_get_stream_by_id(backend_private, "video") != NULL;
1103
1104                                         sipe_media_hangup(call_private);
1105                                         // We might be calling to OC 2007 instance, retry with ICEv6
1106                                         sipe_media_initiate_call(sipe_private, with,
1107                                                                   SIPE_ICE_DRAFT_6, with_video);
1108
1109                                         g_free(with);
1110                                         return TRUE;
1111                                 }
1112                                 // Break intentionally omitted
1113                         }
1114                         default:
1115                                 title = _("Error occured");
1116                                 g_string_append(desc, _("Unable to establish a call"));
1117                                 append_responsestr = TRUE;
1118                                 break;
1119                 }
1120
1121                 if (append_responsestr)
1122                         g_string_append_printf(desc, "\n%d %s",
1123                                                msg->response, msg->responsestr);
1124
1125                 sipe_backend_notify_error(SIPE_CORE_PUBLIC, title, desc->str);
1126                 g_string_free(desc, TRUE);
1127
1128                 sipe_media_send_ack(sipe_private, msg, trans);
1129                 sipe_media_hangup(call_private);
1130
1131                 return TRUE;
1132         }
1133
1134         sipe_dialog_parse(dialog, msg, TRUE);
1135         smsg = sdpmsg_parse_msg(msg->body);
1136         if (!smsg) {
1137                 sip_transport_response(sipe_private, msg,
1138                                        488, "Not Acceptable Here", NULL);
1139                 sipe_media_hangup(call_private);
1140                 return FALSE;
1141         }
1142
1143         apply_remote_message(call_private, smsg);
1144         sdpmsg_free(smsg);
1145
1146         sipe_media_send_ack(sipe_private, msg, trans);
1147         reinvite_on_candidate_pair_cb(SIPE_CORE_PUBLIC);
1148
1149         return TRUE;
1150 }
1151
1152 gboolean is_media_session_msg(struct sipe_media_call_private *call_private,
1153                               struct sipmsg *msg)
1154 {
1155         if (call_private) {
1156                 const gchar *callid = sipmsg_find_header(msg, "Call-ID");
1157                 struct sip_session *session;
1158
1159                 session = sipe_session_find_call(call_private->sipe_private,
1160                                                  call_private->with);
1161                 if (session) {
1162                         struct sip_dialog *dialog = session->dialogs->data;
1163                         return sipe_strequal(dialog->callid, callid);
1164                 }
1165         }
1166         return FALSE;
1167 }
1168
1169 void sipe_media_handle_going_offline(struct sipe_media_call_private *call_private)
1170 {
1171         struct sipe_backend_media *backend_private;
1172
1173         backend_private = call_private->public.backend_private;
1174
1175         if (   !sipe_backend_media_is_initiator(backend_private, NULL)
1176             && !sipe_backend_media_accepted(backend_private)) {
1177                 sip_transport_response(call_private->sipe_private,
1178                                        call_private->invitation,
1179                                        480, "Temporarily Unavailable", NULL);
1180         } else {
1181                 struct sip_session *session;
1182
1183                 session = sipe_session_find_call(call_private->sipe_private,
1184                                                  call_private->with);
1185                 if (session)
1186                         sipe_session_close(call_private->sipe_private, session);
1187         }
1188
1189         sipe_media_hangup(call_private);
1190 }
1191
1192 gboolean sipe_media_is_conference_call(struct sipe_media_call_private *call_private)
1193 {
1194         return g_strstr_len(call_private->with, -1, "app:conf:audio-video:") != NULL;
1195 }
1196
1197 static void
1198 sipe_media_relay_free(struct sipe_media_relay *relay)
1199 {
1200         g_free(relay->hostname);
1201         if (relay->dns_query)
1202                 sipe_backend_dns_query_cancel(relay->dns_query);
1203         g_free(relay);
1204 }
1205
1206 void
1207 sipe_media_relay_list_free(GSList *list)
1208 {
1209         for (; list; list = g_slist_delete_link(list, list))
1210                 sipe_media_relay_free(list->data);
1211 }
1212
1213 static void
1214 relay_ip_resolved_cb(struct sipe_media_relay* relay,
1215                      const gchar *ip, SIPE_UNUSED_PARAMETER guint port)
1216 {
1217         gchar *hostname = relay->hostname;
1218         relay->dns_query = NULL;
1219
1220         if (ip && port) {
1221                 relay->hostname = g_strdup(ip);
1222                 SIPE_DEBUG_INFO("Media relay %s resolved to %s.", hostname, ip);
1223         } else {
1224                 relay->hostname = NULL;
1225                 SIPE_DEBUG_INFO("Unable to resolve media relay %s.", hostname);
1226         }
1227
1228         g_free(hostname);
1229 }
1230
1231 static gboolean
1232 process_get_av_edge_credentials_response(struct sipe_core_private *sipe_private,
1233                                          struct sipmsg *msg,
1234                                          SIPE_UNUSED_PARAMETER struct transaction *trans)
1235 {
1236         g_free(sipe_private->media_relay_username);
1237         g_free(sipe_private->media_relay_password);
1238         sipe_media_relay_list_free(sipe_private->media_relays);
1239         sipe_private->media_relay_username = NULL;
1240         sipe_private->media_relay_password = NULL;
1241         sipe_private->media_relays = NULL;
1242
1243         if (msg->response >= 400) {
1244                 SIPE_DEBUG_INFO_NOFORMAT("process_get_av_edge_credentials_response: SERVICE response is not 200. "
1245                                          "Failed to obtain A/V Edge credentials.");
1246                 return FALSE;
1247         }
1248
1249         if (msg->response == 200) {
1250                 sipe_xml *xn_response = sipe_xml_parse(msg->body, msg->bodylen);
1251
1252                 if (sipe_strequal("OK", sipe_xml_attribute(xn_response, "reasonPhrase"))) {
1253                         const sipe_xml *xn_credentials = sipe_xml_child(xn_response, "credentialsResponse/credentials");
1254                         const sipe_xml *xn_relays = sipe_xml_child(xn_response, "credentialsResponse/mediaRelayList");
1255                         const sipe_xml *item;
1256                         GSList *relays = NULL;
1257
1258                         item = sipe_xml_child(xn_credentials, "username");
1259                         sipe_private->media_relay_username = sipe_xml_data(item);
1260                         item = sipe_xml_child(xn_credentials, "password");
1261                         sipe_private->media_relay_password = sipe_xml_data(item);
1262
1263                         for (item = sipe_xml_child(xn_relays, "mediaRelay"); item; item = sipe_xml_twin(item)) {
1264                                 struct sipe_media_relay *relay = g_new0(struct sipe_media_relay, 1);
1265                                 const sipe_xml *node;
1266                                 gchar *tmp;
1267
1268                                 node = sipe_xml_child(item, "hostName");
1269                                 relay->hostname = sipe_xml_data(node);
1270
1271                                 node = sipe_xml_child(item, "udpPort");
1272                                 relay->udp_port = atoi(tmp = sipe_xml_data(node));
1273                                 g_free(tmp);
1274
1275                                 node = sipe_xml_child(item, "tcpPort");
1276                                 relay->tcp_port = atoi(tmp = sipe_xml_data(node));
1277                                 g_free(tmp);
1278
1279                                 relays = g_slist_append(relays, relay);
1280
1281                                 relay->dns_query = sipe_backend_dns_query_a(
1282                                                         SIPE_CORE_PUBLIC,
1283                                                         relay->hostname,
1284                                                         relay->udp_port,
1285                                                         (sipe_dns_resolved_cb) relay_ip_resolved_cb,
1286                                                         relay);
1287
1288                                 SIPE_DEBUG_INFO("Media relay: %s TCP: %d UDP: %d",
1289                                                 relay->hostname,
1290                                                 relay->tcp_port, relay->udp_port);
1291                         }
1292
1293                         sipe_private->media_relays = relays;
1294                 }
1295
1296                 sipe_xml_free(xn_response);
1297         }
1298
1299         return TRUE;
1300 }
1301
1302 void
1303 sipe_media_get_av_edge_credentials(struct sipe_core_private *sipe_private)
1304 {
1305         // TODO: re-request credentials after duration expires?
1306         const char CRED_REQUEST_XML[] =
1307                 "<request requestID=\"%d\" "
1308                          "from=\"%s\" "
1309                          "version=\"1.0\" "
1310                          "to=\"%s\" "
1311                          "xmlns=\"http://schemas.microsoft.com/2006/09/sip/mrasp\" "
1312                          "xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\">"
1313                         "<credentialsRequest credentialsRequestID=\"%d\">"
1314                                 "<identity>%s</identity>"
1315                                 "<location>%s</location>"
1316                                 "<duration>480</duration>"
1317                         "</credentialsRequest>"
1318                 "</request>";
1319
1320         int request_id = rand();
1321         gchar *self;
1322         gchar *body;
1323
1324         if (!sipe_private->mras_uri)
1325                 return;
1326
1327         self = sip_uri_self(sipe_private);
1328
1329         body = g_strdup_printf(
1330                 CRED_REQUEST_XML,
1331                 request_id,
1332                 self,
1333                 sipe_private->mras_uri,
1334                 request_id,
1335                 self,
1336                 SIPE_CORE_PRIVATE_FLAG_IS(REMOTE_USER) ? "internet" : "intranet");
1337         g_free(self);
1338
1339         sip_transport_service(sipe_private,
1340                               sipe_private->mras_uri,
1341                               "Content-Type: application/msrtc-media-relay-auth+xml\r\n",
1342                               body,
1343                               process_get_av_edge_credentials_response);
1344
1345         g_free(body);
1346 }
1347
1348 /*
1349   Local Variables:
1350   mode: c
1351   c-file-style: "bsd"
1352   indent-tabs-mode: t
1353   tab-width: 8
1354   End:
1355 */