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audio: move repeating code to a function
[siplcs.git] / src / core / sipe-media.c
bloba383498f1ceccb7f91d97baac5e3a3ec4cb94004
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 #ifdef HAVE_CONFIG_H
24 #include "config.h"
25 #endif
26
27 #include <glib.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30
31 #include "sipe-core.h"
32 #include "sipe-core-private.h"
33 #include "sipe.h"
34 #include "sipmsg.h"
35 #include "sipe-session.h"
36 #include "sipe-media.h"
37 #include "sipe-dialog.h"
38 #include "sipe-utils.h"
39 #include "sipe-common.h"
40 #include "sip-transport.h"
41
42 gchar *
43 sipe_media_get_callid(sipe_media_call *call)
44 {
45 return call->dialog->callid;
46 }
47
48 void sipe_media_codec_list_free(GList *codecs)
49 {
50 for (; codecs; codecs = g_list_delete_link(codecs, codecs))
51 sipe_backend_codec_free(codecs->data);
52 }
53
54 void sipe_media_candidate_list_free(GList *candidates)
55 {
56 for (; candidates; candidates = g_list_delete_link(candidates, candidates))
57 sipe_backend_candidate_free(candidates->data);
58 }
59
60 static void
61 sipe_media_call_free(sipe_media_call *call)
62 {
63 if (call) {
64 sipe_utils_nameval_free(call->sdp_attrs);
65 if (call->invitation)
66 sipmsg_free(call->invitation);
67 sipe_media_codec_list_free(call->remote_codecs);
68 sipe_media_candidate_list_free(call->remote_candidates);
69 g_free(call);
70 }
71 }
72
73 static GList *
74 sipe_media_parse_codecs(GSList *sdp_attrs)
75 {
76 int i = 0;
77 const gchar *attr;
78 GList *codecs = NULL;
79
80 while ((attr = sipe_utils_nameval_find_instance(sdp_attrs, "rtpmap", i++))) {
81 gchar **tokens = g_strsplit_set(attr, " /", 3);
82
83 int id = atoi(tokens[0]);
84 gchar *name = tokens[1];
85 int clock_rate = atoi(tokens[2]);
86 SipeMediaType type = SIPE_MEDIA_AUDIO;
87
88 sipe_codec *codec = sipe_backend_codec_new(id, name, clock_rate, type);
89
90 // TODO: more secure and effective implementation
91 int j = 0;
92 const gchar* params;
93 while((params = sipe_utils_nameval_find_instance(sdp_attrs, "fmtp", j++))) {
94 gchar **tokens = g_strsplit_set(params, " ", 0);
95 gchar **next = tokens + 1;
96
97 if (atoi(tokens[0]) == id) {
98 while (*next) {
99 gchar name[50];
100 gchar value[50];
101
102 if (sscanf(*next, "%[a-zA-Z0-9]=%s", name, value) == 2)
103 sipe_backend_codec_add_optional_parameter(codec, name, value);
104
105 ++next;
106 }
107 }
108
109 g_strfreev(tokens);
110 }
111
112 codecs = g_list_append(codecs, codec);
113 g_strfreev(tokens);
114 }
115
116 return codecs;
117 }
118
119 static gint
120 codec_name_compare(sipe_codec* codec1, sipe_codec* codec2)
121 {
122 gchar *name1 = sipe_backend_codec_get_name(codec1);
123 gchar *name2 = sipe_backend_codec_get_name(codec2);
124
125 return g_strcmp0(name1, name2);
126 }
127
128 static GList *
129 sipe_media_prune_remote_codecs(GList *local_codecs, GList *remote_codecs)
130 {
131 GList *remote_codecs_head = remote_codecs;
132 GList *pruned_codecs = NULL;
133
134 while (remote_codecs) {
135 sipe_codec *c = remote_codecs->data;
136
137 if (g_list_find_custom(local_codecs, c, (GCompareFunc)codec_name_compare)) {
138 pruned_codecs = g_list_append(pruned_codecs, c);
139 remote_codecs->data = NULL;
140 }
141 remote_codecs = remote_codecs->next;
142 }
143
144 sipe_media_codec_list_free(remote_codecs_head);
145
146 return pruned_codecs;
147 }
148
149 static GList *
150 sipe_media_parse_remote_candidates_legacy(gchar *remote_ip, guint16 remote_port)
151 {
152 sipe_candidate *candidate;
153 GList *candidates = NULL;
154
155 candidate = sipe_backend_candidate_new("foundation",
156 SIPE_COMPONENT_RTP,
157 SIPE_CANDIDATE_TYPE_HOST,
158 SIPE_NETWORK_PROTOCOL_UDP,
159 remote_ip, remote_port);
160 candidates = g_list_append(candidates, candidate);
161
162 candidate = sipe_backend_candidate_new("foundation",
163 SIPE_COMPONENT_RTCP,
164 SIPE_CANDIDATE_TYPE_HOST,
165 SIPE_NETWORK_PROTOCOL_UDP,
166 remote_ip, remote_port + 1);
167 candidates = g_list_append(candidates, candidate);
168
169 return candidates;
170 }
171
172 static GList *
173 sipe_media_parse_remote_candidates(GSList *sdp_attrs)
174 {
175 sipe_candidate *candidate;
176 GList *candidates = NULL;
177 const gchar *attr;
178 int i = 0;
179
180 const gchar* username = sipe_utils_nameval_find(sdp_attrs, "ice-ufrag");
181 const gchar* password = sipe_utils_nameval_find(sdp_attrs, "ice-pwd");
182
183 while ((attr = sipe_utils_nameval_find_instance(sdp_attrs, "candidate", i++))) {
184 gchar **tokens;
185 gchar *foundation;
186 SipeComponentType component;
187 SipeNetworkProtocol protocol;
188 guint32 priority;
189 gchar* ip;
190 guint16 port;
191 SipeCandidateType type;
192
193 tokens = g_strsplit_set(attr, " ", 0);
194
195 foundation = tokens[0];
196
197 switch (atoi(tokens[1])) {
198 case 1:
199 component = SIPE_COMPONENT_RTP;
200 break;
201 case 2:
202 component = SIPE_COMPONENT_RTCP;
203 break;
204 default:
205 component = SIPE_COMPONENT_NONE;
206 }
207
208 if (sipe_strequal(tokens[2], "UDP"))
209 protocol = SIPE_NETWORK_PROTOCOL_UDP;
210 else {
211 // Ignore TCP candidates, at least for now...
212 g_strfreev(tokens);
213 continue;
214 }
215
216 priority = atoi(tokens[3]);
217 ip = tokens[4];
218 port = atoi(tokens[5]);
219
220 if (sipe_strequal(tokens[7], "host"))
221 type = SIPE_CANDIDATE_TYPE_HOST;
222 else if (sipe_strequal(tokens[7], "relay"))
223 type = SIPE_CANDIDATE_TYPE_RELAY;
224 else if (sipe_strequal(tokens[7], "srflx"))
225 type = SIPE_CANDIDATE_TYPE_SRFLX;
226 else {
227 g_strfreev(tokens);
228 continue;
229 }
230
231 candidate = sipe_backend_candidate_new(foundation, component,
232 type, protocol, ip, port);
233 sipe_backend_candidate_set_priority(candidate, priority);
234 candidates = g_list_append(candidates, candidate);
235
236 g_strfreev(tokens);
237 }
238
239 if (username) {
240 GList *it = candidates;
241 while (it) {
242 sipe_backend_candidate_set_username_and_pwd(it->data, username, password);
243 it = it->next;
244 }
245 }
246
247 return candidates;
248 }
249
250 static gchar *
251 sipe_media_sdp_codec_ids_format(GList *codecs)
252 {
253 GString *result = g_string_new(NULL);
254
255 while (codecs) {
256 sipe_codec *c = codecs->data;
257
258 gchar *tmp = g_strdup_printf(" %d", sipe_backend_codec_get_id(c));
259 g_string_append(result,tmp);
260 g_free(tmp);
261
262 codecs = codecs->next;
263 }
264
265 return g_string_free(result, FALSE);
266 }
267
268 static gchar *
269 sipe_media_sdp_codecs_format(GList *codecs)
270 {
271 GString *result = g_string_new(NULL);
272
273 while (codecs) {
274 sipe_codec *c = codecs->data;
275 GList *params = NULL;
276
277 gchar *tmp = g_strdup_printf("a=rtpmap:%d %s/%d\r\n",
278 sipe_backend_codec_get_id(c),
279 sipe_backend_codec_get_name(c),
280 sipe_backend_codec_get_clock_rate(c));
281
282 g_string_append(result, tmp);
283 g_free(tmp);
284
285 if ((params = sipe_backend_codec_get_optional_parameters(c))) {
286 tmp = g_strdup_printf("a=fmtp:%d",sipe_backend_codec_get_id(c));
287 g_string_append(result, tmp);
288 g_free(tmp);
289
290 while (params) {
291 struct sipnameval* par = params->data;
292 tmp = g_strdup_printf(" %s=%s", par->name, par->value);
293 g_string_append(result, tmp);
294 g_free(tmp);
295 params = params->next;
296 }
297 g_string_append(result, "\r\n");
298 }
299
300 codecs = codecs->next;
301 }
302
303 return g_string_free(result, FALSE);
304 }
305
306 static gchar *
307 sipe_media_sdp_candidates_format(GList *candidates, sipe_media_call* call)
308 {
309 GString *result = g_string_new("");
310 gchar *tmp;
311 gchar *username = sipe_backend_candidate_get_username(candidates->data);
312 gchar *password = sipe_backend_candidate_get_password(candidates->data);
313 guint16 rtcp_port = 0;
314
315 if (call->legacy_mode)
316 return g_string_free(result, FALSE);
317
318 tmp = g_strdup_printf("a=ice-ufrag:%s\r\na=ice-pwd:%s\r\n",username, password);
319 g_string_append(result, tmp);
320 g_free(tmp);
321
322 while (candidates) {
323 sipe_candidate *c = candidates->data;
324
325 guint16 port;
326 guint16 component;
327 gchar *protocol;
328 gchar *type;
329
330 port = sipe_backend_candidate_get_port(c);
331
332 switch (sipe_backend_candidate_get_component_type(c)) {
333 case SIPE_COMPONENT_RTP:
334 component = 1;
335 break;
336 case SIPE_COMPONENT_RTCP:
337 component = 2;
338 if (rtcp_port == 0)
339 rtcp_port = port;
340 break;
341 case SIPE_COMPONENT_NONE:
342 component = 0;
343 }
344
345 switch (sipe_backend_candidate_get_protocol(c)) {
346 case SIPE_NETWORK_PROTOCOL_TCP:
347 protocol = "TCP";
348 break;
349 case SIPE_NETWORK_PROTOCOL_UDP:
350 protocol = "UDP";
351 break;
352 }
353
354 switch (sipe_backend_candidate_get_type(c)) {
355 case SIPE_CANDIDATE_TYPE_HOST:
356 type = "host";
357 break;
358 case SIPE_CANDIDATE_TYPE_RELAY:
359 type = "relay";
360 break;
361 case SIPE_CANDIDATE_TYPE_SRFLX:
362 type = "srflx";
363 break;
364 default:
365 // TODO: error unknown/unsupported type
366 break;
367 }
368
369 tmp = g_strdup_printf("a=candidate:%s %u %s %u %s %d typ %s \r\n",
370 sipe_backend_candidate_get_foundation(c),
371 component,
372 protocol,
373 sipe_backend_candidate_get_priority(c),
374 sipe_backend_candidate_get_ip(c),
375 port,
376 type);
377
378 g_string_append(result, tmp);
379 g_free(tmp);
380
381 candidates = candidates->next;
382 }
383
384 // No exchange of remote candidates in the first round of negotiation
385 if ((call->invite_cnt > 1) && call->remote_candidates) {
386 sipe_candidate *first = call->remote_candidates->data;
387 sipe_candidate *second = call->remote_candidates->next->data;
388 tmp = g_strdup_printf("a=remote-candidates:1 %s %u 2 %s %u\r\n",
389 sipe_backend_candidate_get_ip(first), sipe_backend_candidate_get_port(first),
390 sipe_backend_candidate_get_ip(second), sipe_backend_candidate_get_port(second));
391
392 g_string_append(result, tmp);
393 g_free(tmp);
394 }
395
396
397 if (rtcp_port != 0) {
398 tmp = g_strdup_printf("a=maxptime:200\r\na=rtcp:%u\r\n", rtcp_port);
399 g_string_append(result, tmp);
400 g_free(tmp);
401 }
402
403 return g_string_free(result, FALSE);
404 }
405
406 static gchar*
407 sipe_media_create_sdp(sipe_media_call *call) {
408 GList *usable_codecs = sipe_backend_get_local_codecs(call);
409 GList *local_candidates = sipe_backend_get_local_candidates(call, call->dialog->with);
410
411 // TODO: more sophisticated
412 guint16 local_port = sipe_backend_candidate_get_port(local_candidates->data);
413 const char *ip = sipe_utils_get_suitable_local_ip(-1);
414
415 gchar *sdp_codecs = sipe_media_sdp_codecs_format(usable_codecs);
416 gchar *sdp_codec_ids = sipe_media_sdp_codec_ids_format(usable_codecs);
417 gchar *sdp_candidates = sipe_media_sdp_candidates_format(local_candidates, call);
418 gchar *inactive = (call->local_on_hold || call->remote_on_hold) ? "a=inactive\r\n" : "";
419
420 gchar *body = g_strdup_printf(
421 "v=0\r\n"
422 "o=- 0 0 IN IP4 %s\r\n"
423 "s=session\r\n"
424 "c=IN IP4 %s\r\n"
425 "b=CT:99980\r\n"
426 "t=0 0\r\n"
427 "m=audio %d RTP/AVP%s\r\n"
428 "%s"
429 "%s"
430 "%s"
431 "a=encryption:rejected\r\n"
432 ,ip, ip, local_port, sdp_codec_ids, sdp_candidates, inactive, sdp_codecs);
433
434 g_free(sdp_codecs);
435 g_free(sdp_codec_ids);
436 g_free(sdp_candidates);
437
438 return body;
439 }
440
441 static void
442 sipe_invite_call(struct sipe_account_data *sip, TransCallback tc)
443 {
444 gchar *hdr;
445 gchar *contact;
446 gchar *body;
447 sipe_media_call *call = sip->media_call;
448 struct sip_dialog *dialog = call->dialog;
449
450 ++(call->invite_cnt);
451
452 contact = get_contact(sip);
453 hdr = g_strdup_printf(
454 "Supported: ms-early-media\r\n"
455 "Supported: 100rel\r\n"
456 "ms-keep-alive: UAC;hop-hop=yes\r\n"
457 "Contact: %s%s\r\n"
458 "Content-Type: application/sdp\r\n",
459 contact,
460 (call->local_on_hold || call->remote_on_hold) ? ";+sip.rendering=\"no\"" : "");
461 g_free(contact);
462
463 body = sipe_media_create_sdp(call);
464
465 send_sip_request(SIP_TO_CORE_PRIVATE, "INVITE", dialog->with, dialog->with, hdr, body,
466 dialog, tc);
467
468 g_free(body);
469 g_free(hdr);
470 }
471
472 static gboolean
473 sipe_media_parse_remote_codecs(sipe_media_call *call);
474
475 static gboolean
476 sipe_media_parse_sdp_attributes_and_candidates(sipe_media_call* call, gchar *frame) {
477 gchar **lines = g_strsplit(frame, "\r\n", 0);
478 GSList *sdp_attrs = NULL;
479 gchar *remote_ip = NULL;
480 guint16 remote_port = 0;
481 GList *remote_candidates;
482 gchar **ptr;
483 gboolean no_error = TRUE;
484
485 for (ptr = lines; *ptr != NULL; ++ptr) {
486 if (g_str_has_prefix(*ptr, "a=")) {
487 gchar **parts = g_strsplit(*ptr + 2, ":", 2);
488 if(!parts[0]) {
489 g_strfreev(parts);
490 sipe_utils_nameval_free(sdp_attrs);
491 sdp_attrs = NULL;
492 no_error = FALSE;
493 break;
494 }
495 sdp_attrs = sipe_utils_nameval_add(sdp_attrs, parts[0], parts[1]);
496 g_strfreev(parts);
497
498 } else if (g_str_has_prefix(*ptr, "o=")) {
499 gchar **parts = g_strsplit(*ptr + 2, " ", 6);
500 remote_ip = g_strdup(parts[5]);
501 g_strfreev(parts);
502 } else if (g_str_has_prefix(*ptr, "m=")) {
503 gchar **parts = g_strsplit(*ptr + 2, " ", 3);
504 remote_port = atoi(parts[1]);
505 g_strfreev(parts);
506 }
507 }
508
509 g_strfreev(lines);
510
511 remote_candidates = sipe_media_parse_remote_candidates(sdp_attrs);
512 if (!remote_candidates) {
513 // No a=candidate in SDP message, revert to OC2005 behaviour
514 sipe_media_parse_remote_candidates_legacy(remote_ip, remote_port);
515 // This seems to be pre-OC2007 R2 UAC
516 call->legacy_mode = TRUE;
517 }
518
519 if (no_error) {
520 sipe_utils_nameval_free(call->sdp_attrs);
521 sipe_media_candidate_list_free(call->remote_candidates);
522
523 call->sdp_attrs = sdp_attrs;
524 call->remote_ip = remote_ip;
525 call->remote_port = remote_port;
526 call->remote_candidates = remote_candidates;
527 } else {
528 sipe_utils_nameval_free(sdp_attrs);
529 sipe_media_candidate_list_free(remote_candidates);
530 }
531
532 return no_error;
533 }
534
535 static gboolean
536 sipe_media_parse_remote_codecs(sipe_media_call *call)
537 {
538 GList *local_codecs = sipe_backend_get_local_codecs(call);
539 GList *remote_codecs;
540
541 remote_codecs = sipe_media_parse_codecs(call->sdp_attrs);
542 remote_codecs = sipe_media_prune_remote_codecs(local_codecs, remote_codecs);
543
544 if (remote_codecs) {
545 sipe_media_codec_list_free(call->remote_codecs);
546
547 call->remote_codecs = remote_codecs;
548
549 if (!sipe_backend_set_remote_codecs(call, call->dialog->with)) {
550 printf("ERROR SET REMOTE CODECS"); // TODO
551 return FALSE;
552 }
553
554 return TRUE;
555 } else {
556 sipe_media_codec_list_free(remote_codecs);
557 printf("ERROR NO CANDIDATES OR CODECS");
558
559 return FALSE;
560 }
561 }
562
563 static struct sip_dialog *
564 sipe_media_dialog_init(struct sip_session* session, struct sipmsg *msg)
565 {
566 gchar *newTag = gentag();
567 const gchar *oldHeader;
568 gchar *newHeader;
569 struct sip_dialog *dialog;
570
571 oldHeader = sipmsg_find_header(msg, "To");
572 newHeader = g_strdup_printf("%s;tag=%s", oldHeader, newTag);
573 sipmsg_remove_header_now(msg, "To");
574 sipmsg_add_header_now(msg, "To", newHeader);
575 g_free(newHeader);
576
577 dialog = sipe_dialog_add(session);
578 dialog->callid = g_strdup(session->callid);
579 dialog->with = parse_from(sipmsg_find_header(msg, "From"));
580 sipe_dialog_parse(dialog, msg, FALSE);
581
582 return dialog;
583 }
584
585 static void
586 send_response_with_session_description(sipe_media_call *call, int code, gchar *text)
587 {
588 struct sipe_account_data *sip = call->sip;
589 gchar *body = sipe_media_create_sdp(call);
590 sipmsg_add_header(call->invitation, "Content-Type", "application/sdp");
591 send_sip_response(SIP_TO_CORE_PRIVATE, call->invitation, code, text, body);
592 g_free(body);
593 }
594
595 static gboolean
596 sipe_media_process_invite_response(struct sipe_account_data *sip,
597 struct sipmsg *msg,
598 struct transaction *trans);
599
600 static void candidates_prepared_cb(sipe_media_call *call)
601 {
602 if (sipe_backend_media_is_initiator(call->media, call->dialog->with)) {
603 sipe_invite_call(call->sip, sipe_media_process_invite_response);
604 } else if (!call->legacy_mode) {
605 if (!sipe_media_parse_remote_codecs(call)) {
606 g_free(call);
607 return;
608 }
609
610 send_response_with_session_description(call, 183, "Session Progress");
611 }
612 }
613
614 static void media_connected_cb(sipe_media_call *call)
615 {
616 call = call;
617 }
618
619 static void call_accept_cb(sipe_media_call *call, gboolean local)
620 {
621 if (local) {
622 send_response_with_session_description(call, 200, "OK");
623 }
624 }
625
626 static void call_reject_cb(sipe_media_call *call, gboolean local)
627 {
628 if (local) {
629 struct sipe_account_data *sip = call->sip;
630 send_sip_response(SIP_TO_CORE_PRIVATE, call->invitation, 603, "Decline", NULL);
631 call->sip->media_call = NULL;
632 sipe_media_call_free(call);
633 }
634 }
635
636 static gboolean
637 sipe_media_send_ack(struct sipe_account_data *sip, struct sipmsg *msg,
638 struct transaction *trans);
639
640 static void call_hold_cb(sipe_media_call *call, gboolean local, gboolean state)
641 {
642 if (local && (call->local_on_hold != state)) {
643 call->local_on_hold = state;
644 sipe_invite_call(call->sip, sipe_media_send_ack);
645 } else if (call->remote_on_hold != state) {
646 call->remote_on_hold = state;
647 send_response_with_session_description(call, 200, "OK");
648 }
649 }
650
651 static void call_hangup_cb(sipe_media_call *call, gboolean local)
652 {
653 if (local) {
654 struct sipe_account_data *sip = call->sip;
655 send_sip_request(SIP_TO_CORE_PRIVATE, "BYE", call->dialog->with, call->dialog->with,
656 NULL, NULL, call->dialog, NULL);
657 }
658 call->sip->media_call = NULL;
659 sipe_media_call_free(call);
660 }
661
662 static sipe_media_call *
663 sipe_media_call_init(struct sipe_account_data *sip, const gchar* participant, gboolean initiator)
664 {
665 sipe_media_call *call = g_new0(sipe_media_call, 1);
666
667 call->sip = sip;
668 call->media = sipe_backend_media_new(call, participant, initiator);
669
670 call->legacy_mode = FALSE;
671
672 call->candidates_prepared_cb = candidates_prepared_cb;
673 call->media_connected_cb = media_connected_cb;
674 call->call_accept_cb = call_accept_cb;
675 call->call_reject_cb = call_reject_cb;
676 call->call_hold_cb = call_hold_cb;
677 call->call_hangup_cb = call_hangup_cb;
678
679 call->local_on_hold = FALSE;
680 call->remote_on_hold = FALSE;
681
682 return call;
683 }
684
685 void sipe_media_hangup(struct sipe_account_data *sip)
686 {
687 if (sip->media_call)
688 sipe_backend_media_hangup(sip->media_call->media, FALSE);
689 }
690
691 void
692 sipe_media_initiate_call(struct sipe_account_data *sip, const char *participant)
693 {
694 sipe_media_call *call;
695
696 if (sip->media_call)
697 return;
698
699 call = sipe_media_call_init(sip, participant, TRUE);
700
701 sip->media_call = call;
702
703 call->session = sipe_session_add_chat(sip);
704 call->dialog = sipe_dialog_add(call->session);
705 call->dialog->callid = gencallid();
706 call->dialog->with = g_strdup(participant);
707 call->dialog->ourtag = gentag();
708
709 sipe_backend_media_add_stream(call->media, participant, SIPE_MEDIA_AUDIO,
710 !call->legacy_mode, TRUE);
711 }
712
713
714 void
715 sipe_media_incoming_invite(struct sipe_account_data *sip, struct sipmsg *msg)
716 {
717 const gchar *callid = sipmsg_find_header(msg, "Call-ID");
718
719 sipe_media_call *call;
720 struct sip_session *session;
721 struct sip_dialog *dialog;
722
723 if (sip->media_call) {
724 if (sipe_strequal(sip->media_call->dialog->callid, callid)) {
725 ++(sip->media_call->invite_cnt);
726 call = sip->media_call;
727
728 if (call->invitation)
729 sipmsg_free(call->invitation);
730 call->invitation = sipmsg_copy(msg);
731
732 sipe_utils_nameval_free(call->sdp_attrs);
733 call->sdp_attrs = NULL;
734 if (!sipe_media_parse_sdp_attributes_and_candidates(call, call->invitation->body)) {
735 // TODO: handle error
736 }
737 if (!sipe_media_parse_remote_codecs(call)) {
738 g_free(call);
739 return;
740 }
741
742 if (call->legacy_mode && !call->remote_on_hold) {
743 sipe_backend_media_hold(call->media, FALSE);
744 } else if (sipe_utils_nameval_find(call->sdp_attrs, "inactive")) {
745 sipe_backend_media_hold(call->media, FALSE);
746 } else if (call->remote_on_hold) {
747 sipe_backend_media_unhold(call->media, FALSE);
748 } else {
749 send_response_with_session_description(call, 200, "OK");
750 }
751 } else {
752 send_sip_response(SIP_TO_CORE_PRIVATE, msg, 486, "Busy Here", NULL);
753 }
754 return;
755 }
756
757 session = sipe_session_find_or_add_chat_by_callid(sip, callid);
758 dialog = sipe_media_dialog_init(session, msg);
759
760 call = sipe_media_call_init(sip, dialog->with, FALSE);
761 call->invitation = sipmsg_copy(msg);
762 call->session = session;
763 call->dialog = dialog;
764 call->invite_cnt = 1;
765
766 sip->media_call = call;
767
768 if (!sipe_media_parse_sdp_attributes_and_candidates(call, msg->body)) {
769 // TODO error
770 }
771
772 sipe_backend_media_add_stream(call->media, dialog->with, SIPE_MEDIA_AUDIO, !call->legacy_mode, FALSE);
773 sipe_backend_media_add_remote_candidates(call->media, dialog->with, call->remote_candidates);
774
775 send_sip_response(SIP_TO_CORE_PRIVATE, call->invitation, 180, "Ringing", NULL);
776
777 // Processing continues in candidates_prepared_cb
778 }
779
780 static gboolean
781 sipe_media_send_ack(struct sipe_account_data *sip,
782 SIPE_UNUSED_PARAMETER struct sipmsg *msg,
783 struct transaction *trans)
784 {
785 struct sip_dialog *dialog;
786 int trans_cseq;
787 int tmp_cseq;
788
789 if (!sip->media_call || !sip->media_call->dialog)
790 return FALSE;
791
792 dialog = sip->media_call->dialog;
793 tmp_cseq = dialog->cseq;
794
795 sscanf(trans->key, "<%*[a-zA-Z0-9]><%d INVITE>", &trans_cseq);
796 dialog->cseq = trans_cseq - 1;
797 send_sip_request(SIP_TO_CORE_PRIVATE, "ACK", dialog->with, dialog->with, NULL, NULL, dialog, NULL);
798 dialog->cseq = tmp_cseq;
799
800 return TRUE;
801 }
802
803 static gboolean
804 sipe_media_process_invite_response(struct sipe_account_data *sip,
805 struct sipmsg *msg,
806 struct transaction *trans)
807 {
808 const gchar* callid = sipmsg_find_header(msg, "Call-ID");
809 sipe_media_call *call = sip->media_call;
810
811 if (!call || !sipe_strequal(sipe_media_get_callid(call), callid))
812 return FALSE;
813
814 if (msg->response == 183) {
815 // Session in progress
816 const gchar *rseq = sipmsg_find_header(msg, "RSeq");
817 const gchar *cseq = sipmsg_find_header(msg, "CSeq");
818 gchar *rack = g_strdup_printf("RAck: %s %s\r\n", rseq, cseq);
819
820 if (!sipe_media_parse_sdp_attributes_and_candidates(call, msg->body)) {
821 // TODO: handle error
822 }
823
824 if (!sipe_media_parse_remote_codecs(call)) {
825 g_free(call);
826 return FALSE;
827 }
828
829 sipe_backend_media_add_remote_candidates(call->media, call->dialog->with, call->remote_candidates);
830
831 sipe_dialog_parse(call->dialog, msg, TRUE);
832
833 send_sip_request(SIP_TO_CORE_PRIVATE, "PRACK", call->dialog->with, call->dialog->with, rack, NULL, call->dialog, NULL);
834 g_free(rack);
835 } else {
836 //PurpleMedia* m = (PurpleMedia*) call->media;
837 //purple_media_stream_info(m, PURPLE_MEDIA_INFO_ACCEPT, NULL, NULL, FALSE);
838 sipe_media_send_ack(sip, msg, trans);
839 sipe_invite_call(sip, sipe_media_send_ack);
840 }
841
842 return TRUE;
843 }
844
845 /*
846 Local Variables:
847 mode: c
848 c-file-style: "bsd"
849 indent-tabs-mode: t
850 tab-width: 8
851 End:
852 */
A third-party Pidgin plugin for Microsoft LCS/OCS