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henrike@webrtc.org28e20752013-07-10 00:45:36 +00001/*
kjellanderb24317b2016-02-10 07:54:43 -08002 * Copyright 2012 The WebRTC project authors. All Rights Reserved.
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003 *
kjellanderb24317b2016-02-10 07:54:43 -08004 * Use of this source code is governed by a BSD-style license
5 * that can be found in the LICENSE file in the root of the source
6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree.
henrike@webrtc.org28e20752013-07-10 00:45:36 +00009 */
10
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020011#include "pc/peerconnection.h"
henrike@webrtc.org28e20752013-07-10 00:45:36 +000012
deadbeefeb459812015-12-15 19:24:43 -080013#include <algorithm>
Steve Antondcc3c022017-12-22 16:02:54 -080014#include <queue>
Steve Anton75737c02017-11-06 10:37:17 -080015#include <set>
kwiberg0eb15ed2015-12-17 03:04:15 -080016#include <utility>
17#include <vector>
henrike@webrtc.org28e20752013-07-10 00:45:36 +000018
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020019#include "api/jsepicecandidate.h"
20#include "api/jsepsessiondescription.h"
21#include "api/mediaconstraintsinterface.h"
22#include "api/mediastreamproxy.h"
23#include "api/mediastreamtrackproxy.h"
24#include "call/call.h"
Qingsi Wang93a84392018-01-30 17:13:09 -080025#include "logging/rtc_event_log/icelogger.h"
Elad Alon83ccca12017-10-04 13:18:26 +020026#include "logging/rtc_event_log/output/rtc_event_log_output_file.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020027#include "logging/rtc_event_log/rtc_event_log.h"
28#include "media/sctp/sctptransport.h"
29#include "pc/audiotrack.h"
Steve Anton75737c02017-11-06 10:37:17 -080030#include "pc/channel.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020031#include "pc/channelmanager.h"
32#include "pc/dtmfsender.h"
33#include "pc/mediastream.h"
34#include "pc/mediastreamobserver.h"
35#include "pc/remoteaudiosource.h"
Steve Anton1d03a752017-11-27 14:30:09 -080036#include "pc/rtpmediautils.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020037#include "pc/rtpreceiver.h"
38#include "pc/rtpsender.h"
Steve Anton75737c02017-11-06 10:37:17 -080039#include "pc/sctputils.h"
Steve Antona3a92c22017-12-07 10:27:41 -080040#include "pc/sdputils.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020041#include "pc/streamcollection.h"
42#include "pc/videocapturertracksource.h"
43#include "pc/videotrack.h"
44#include "rtc_base/bind.h"
45#include "rtc_base/checks.h"
46#include "rtc_base/logging.h"
Karl Wiberge40468b2017-11-22 10:42:26 +010047#include "rtc_base/numerics/safe_conversions.h"
Elad Alon83ccca12017-10-04 13:18:26 +020048#include "rtc_base/ptr_util.h"
Mirko Bonadei92ea95e2017-09-15 06:47:31 +020049#include "rtc_base/stringencode.h"
50#include "rtc_base/stringutils.h"
51#include "rtc_base/trace_event.h"
52#include "system_wrappers/include/clock.h"
53#include "system_wrappers/include/field_trial.h"
henrike@webrtc.org28e20752013-07-10 00:45:36 +000054
Steve Anton75737c02017-11-06 10:37:17 -080055using cricket::ContentInfo;
56using cricket::ContentInfos;
57using cricket::MediaContentDescription;
58using cricket::SessionDescription;
Steve Anton5adfafd2017-12-20 16:34:00 -080059using cricket::MediaProtocolType;
Steve Anton75737c02017-11-06 10:37:17 -080060using cricket::TransportInfo;
61
62using cricket::LOCAL_PORT_TYPE;
63using cricket::STUN_PORT_TYPE;
64using cricket::RELAY_PORT_TYPE;
65using cricket::PRFLX_PORT_TYPE;
66
Steve Antonba818672017-11-06 10:21:57 -080067namespace webrtc {
68
Steve Anton75737c02017-11-06 10:37:17 -080069// Error messages
70const char kBundleWithoutRtcpMux[] =
71 "rtcp-mux must be enabled when BUNDLE "
72 "is enabled.";
Steve Anton75737c02017-11-06 10:37:17 -080073const char kInvalidCandidates[] = "Description contains invalid candidates.";
74const char kInvalidSdp[] = "Invalid session description.";
75const char kMlineMismatchInAnswer[] =
76 "The order of m-lines in answer doesn't match order in offer. Rejecting "
77 "answer.";
78const char kMlineMismatchInSubsequentOffer[] =
79 "The order of m-lines in subsequent offer doesn't match order from "
80 "previous offer/answer.";
Steve Anton75737c02017-11-06 10:37:17 -080081const char kSdpWithoutDtlsFingerprint[] =
82 "Called with SDP without DTLS fingerprint.";
83const char kSdpWithoutSdesCrypto[] = "Called with SDP without SDES crypto.";
84const char kSdpWithoutIceUfragPwd[] =
85 "Called with SDP without ice-ufrag and ice-pwd.";
86const char kSessionError[] = "Session error code: ";
87const char kSessionErrorDesc[] = "Session error description: ";
88const char kDtlsSrtpSetupFailureRtp[] =
89 "Couldn't set up DTLS-SRTP on RTP channel.";
90const char kDtlsSrtpSetupFailureRtcp[] =
91 "Couldn't set up DTLS-SRTP on RTCP channel.";
henrike@webrtc.org28e20752013-07-10 00:45:36 +000092
Steve Anton75737c02017-11-06 10:37:17 -080093namespace {
henrike@webrtc.org28e20752013-07-10 00:45:36 +000094
Seth Hampson845e8782018-03-02 11:34:10 -080095static const char kDefaultStreamId[] = "default";
Steve Anton4171afb2017-11-20 10:20:22 -080096static const char kDefaultAudioSenderId[] = "defaulta0";
97static const char kDefaultVideoSenderId[] = "defaultv0";
deadbeefab9b2d12015-10-14 11:33:11 -070098
zhihuang8f65cdf2016-05-06 18:40:30 -070099// The length of RTCP CNAMEs.
100static const int kRtcpCnameLength = 16;
101
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000102enum {
wu@webrtc.org91053e72013-08-10 07:18:04 +0000103 MSG_SET_SESSIONDESCRIPTION_SUCCESS = 0,
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000104 MSG_SET_SESSIONDESCRIPTION_FAILED,
deadbeefab9b2d12015-10-14 11:33:11 -0700105 MSG_CREATE_SESSIONDESCRIPTION_FAILED,
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000106 MSG_GETSTATS,
deadbeefbd292462015-12-14 18:15:29 -0800107 MSG_FREE_DATACHANNELS,
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000108};
109
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +0000110struct SetSessionDescriptionMsg : public rtc::MessageData {
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000111 explicit SetSessionDescriptionMsg(
112 webrtc::SetSessionDescriptionObserver* observer)
113 : observer(observer) {
114 }
115
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +0000116 rtc::scoped_refptr<webrtc::SetSessionDescriptionObserver> observer;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +0100117 RTCError error;
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000118};
119
deadbeefab9b2d12015-10-14 11:33:11 -0700120struct CreateSessionDescriptionMsg : public rtc::MessageData {
121 explicit CreateSessionDescriptionMsg(
122 webrtc::CreateSessionDescriptionObserver* observer)
123 : observer(observer) {}
124
125 rtc::scoped_refptr<webrtc::CreateSessionDescriptionObserver> observer;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +0100126 RTCError error;
deadbeefab9b2d12015-10-14 11:33:11 -0700127};
128
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +0000129struct GetStatsMsg : public rtc::MessageData {
tommi@webrtc.org5b06b062014-08-15 08:38:30 +0000130 GetStatsMsg(webrtc::StatsObserver* observer,
131 webrtc::MediaStreamTrackInterface* track)
132 : observer(observer), track(track) {
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000133 }
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +0000134 rtc::scoped_refptr<webrtc::StatsObserver> observer;
tommi@webrtc.org5b06b062014-08-15 08:38:30 +0000135 rtc::scoped_refptr<webrtc::MediaStreamTrackInterface> track;
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000136};
137
deadbeefab9b2d12015-10-14 11:33:11 -0700138// Check if we can send |new_stream| on a PeerConnection.
139bool CanAddLocalMediaStream(webrtc::StreamCollectionInterface* current_streams,
140 webrtc::MediaStreamInterface* new_stream) {
141 if (!new_stream || !current_streams) {
142 return false;
143 }
Seth Hampson13b8bad2018-03-13 16:05:28 -0700144 if (current_streams->find(new_stream->id()) != nullptr) {
145 RTC_LOG(LS_ERROR) << "MediaStream with ID " << new_stream->id()
Mirko Bonadei675513b2017-11-09 11:09:25 +0100146 << " is already added.";
deadbeefab9b2d12015-10-14 11:33:11 -0700147 return false;
148 }
149 return true;
150}
151
deadbeef5e97fb52015-10-15 12:49:08 -0700152// If the direction is "recvonly" or "inactive", treat the description
153// as containing no streams.
154// See: https://code.google.com/p/webrtc/issues/detail?id=5054
155std::vector<cricket::StreamParams> GetActiveStreams(
156 const cricket::MediaContentDescription* desc) {
Steve Anton4e70a722017-11-28 14:57:10 -0800157 return RtpTransceiverDirectionHasSend(desc->direction())
deadbeef5e97fb52015-10-15 12:49:08 -0700158 ? desc->streams()
159 : std::vector<cricket::StreamParams>();
160}
161
deadbeefab9b2d12015-10-14 11:33:11 -0700162bool IsValidOfferToReceiveMedia(int value) {
163 typedef PeerConnectionInterface::RTCOfferAnswerOptions Options;
164 return (value >= Options::kUndefined) &&
165 (value <= Options::kMaxOfferToReceiveMedia);
166}
167
zhihuang1c378ed2017-08-17 14:10:50 -0700168// Add options to |[audio/video]_media_description_options| from |senders|.
169void AddRtpSenderOptions(
deadbeefa601f5c2016-06-06 14:27:39 -0700170 const std::vector<rtc::scoped_refptr<
171 RtpSenderProxyWithInternal<RtpSenderInternal>>>& senders,
zhihuang1c378ed2017-08-17 14:10:50 -0700172 cricket::MediaDescriptionOptions* audio_media_description_options,
173 cricket::MediaDescriptionOptions* video_media_description_options) {
olka3c747662017-08-17 06:50:32 -0700174 for (const auto& sender : senders) {
zhihuang1c378ed2017-08-17 14:10:50 -0700175 if (sender->media_type() == cricket::MEDIA_TYPE_AUDIO) {
176 if (audio_media_description_options) {
177 audio_media_description_options->AddAudioSender(
Steve Anton8ffb9c32017-08-31 15:45:38 -0700178 sender->id(), sender->internal()->stream_ids());
zhihuang1c378ed2017-08-17 14:10:50 -0700179 }
180 } else {
181 RTC_DCHECK(sender->media_type() == cricket::MEDIA_TYPE_VIDEO);
182 if (video_media_description_options) {
183 video_media_description_options->AddVideoSender(
Steve Anton8ffb9c32017-08-31 15:45:38 -0700184 sender->id(), sender->internal()->stream_ids(), 1);
zhihuang1c378ed2017-08-17 14:10:50 -0700185 }
186 }
zhihuanga77e6bb2017-08-14 18:17:48 -0700187 }
zhihuang1c378ed2017-08-17 14:10:50 -0700188}
olka3c747662017-08-17 06:50:32 -0700189
zhihuang1c378ed2017-08-17 14:10:50 -0700190// Add options to |session_options| from |rtp_data_channels|.
191void AddRtpDataChannelOptions(
192 const std::map<std::string, rtc::scoped_refptr<DataChannel>>&
193 rtp_data_channels,
194 cricket::MediaDescriptionOptions* data_media_description_options) {
195 if (!data_media_description_options) {
196 return;
197 }
deadbeefab9b2d12015-10-14 11:33:11 -0700198 // Check for data channels.
199 for (const auto& kv : rtp_data_channels) {
200 const DataChannel* channel = kv.second;
201 if (channel->state() == DataChannel::kConnecting ||
202 channel->state() == DataChannel::kOpen) {
zhihuang1c378ed2017-08-17 14:10:50 -0700203 // Legacy RTP data channels are signaled with the track/stream ID set to
204 // the data channel's label.
205 data_media_description_options->AddRtpDataChannel(channel->label(),
206 channel->label());
deadbeefab9b2d12015-10-14 11:33:11 -0700207 }
208 }
209}
210
Taylor Brandstettera1c30352016-05-13 08:15:11 -0700211uint32_t ConvertIceTransportTypeToCandidateFilter(
212 PeerConnectionInterface::IceTransportsType type) {
213 switch (type) {
214 case PeerConnectionInterface::kNone:
215 return cricket::CF_NONE;
216 case PeerConnectionInterface::kRelay:
217 return cricket::CF_RELAY;
218 case PeerConnectionInterface::kNoHost:
219 return (cricket::CF_ALL & ~cricket::CF_HOST);
220 case PeerConnectionInterface::kAll:
221 return cricket::CF_ALL;
222 default:
nissec80e7412017-01-11 05:56:46 -0800223 RTC_NOTREACHED();
Taylor Brandstettera1c30352016-05-13 08:15:11 -0700224 }
225 return cricket::CF_NONE;
226}
227
deadbeef293e9262017-01-11 12:28:30 -0800228// Helper to set an error and return from a method.
229bool SafeSetError(webrtc::RTCErrorType type, webrtc::RTCError* error) {
230 if (error) {
231 error->set_type(type);
232 }
233 return type == webrtc::RTCErrorType::NONE;
234}
235
Steve Anton038834f2017-07-14 15:59:59 -0700236bool SafeSetError(webrtc::RTCError error, webrtc::RTCError* error_out) {
237 if (error_out) {
238 *error_out = std::move(error);
239 }
240 return error.ok();
241}
242
Steve Antonba818672017-11-06 10:21:57 -0800243std::string GetSignalingStateString(
244 PeerConnectionInterface::SignalingState state) {
245 switch (state) {
246 case PeerConnectionInterface::kStable:
247 return "kStable";
248 case PeerConnectionInterface::kHaveLocalOffer:
249 return "kHaveLocalOffer";
250 case PeerConnectionInterface::kHaveLocalPrAnswer:
251 return "kHavePrAnswer";
252 case PeerConnectionInterface::kHaveRemoteOffer:
253 return "kHaveRemoteOffer";
254 case PeerConnectionInterface::kHaveRemotePrAnswer:
255 return "kHaveRemotePrAnswer";
256 case PeerConnectionInterface::kClosed:
257 return "kClosed";
258 }
259 RTC_NOTREACHED();
260 return "";
261}
deadbeef0a6c4ca2015-10-06 11:38:28 -0700262
Steve Anton75737c02017-11-06 10:37:17 -0800263IceCandidatePairType GetIceCandidatePairCounter(
264 const cricket::Candidate& local,
265 const cricket::Candidate& remote) {
266 const auto& l = local.type();
267 const auto& r = remote.type();
268 const auto& host = LOCAL_PORT_TYPE;
269 const auto& srflx = STUN_PORT_TYPE;
270 const auto& relay = RELAY_PORT_TYPE;
271 const auto& prflx = PRFLX_PORT_TYPE;
272 if (l == host && r == host) {
273 bool local_private = IPIsPrivate(local.address().ipaddr());
274 bool remote_private = IPIsPrivate(remote.address().ipaddr());
275 if (local_private) {
276 if (remote_private) {
277 return kIceCandidatePairHostPrivateHostPrivate;
278 } else {
279 return kIceCandidatePairHostPrivateHostPublic;
280 }
281 } else {
282 if (remote_private) {
283 return kIceCandidatePairHostPublicHostPrivate;
284 } else {
285 return kIceCandidatePairHostPublicHostPublic;
286 }
287 }
288 }
289 if (l == host && r == srflx)
290 return kIceCandidatePairHostSrflx;
291 if (l == host && r == relay)
292 return kIceCandidatePairHostRelay;
293 if (l == host && r == prflx)
294 return kIceCandidatePairHostPrflx;
295 if (l == srflx && r == host)
296 return kIceCandidatePairSrflxHost;
297 if (l == srflx && r == srflx)
298 return kIceCandidatePairSrflxSrflx;
299 if (l == srflx && r == relay)
300 return kIceCandidatePairSrflxRelay;
301 if (l == srflx && r == prflx)
302 return kIceCandidatePairSrflxPrflx;
303 if (l == relay && r == host)
304 return kIceCandidatePairRelayHost;
305 if (l == relay && r == srflx)
306 return kIceCandidatePairRelaySrflx;
307 if (l == relay && r == relay)
308 return kIceCandidatePairRelayRelay;
309 if (l == relay && r == prflx)
310 return kIceCandidatePairRelayPrflx;
311 if (l == prflx && r == host)
312 return kIceCandidatePairPrflxHost;
313 if (l == prflx && r == srflx)
314 return kIceCandidatePairPrflxSrflx;
315 if (l == prflx && r == relay)
316 return kIceCandidatePairPrflxRelay;
317 return kIceCandidatePairMax;
318}
319
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800320// Logic to decide if an m= section can be recycled. This means that the new
321// m= section is not rejected, but the old local or remote m= section is
322// rejected. |old_content_one| and |old_content_two| refer to the m= section
323// of the old remote and old local descriptions in no particular order.
324// We need to check both the old local and remote because either
325// could be the most current from the latest negotation.
326bool IsMediaSectionBeingRecycled(SdpType type,
327 const ContentInfo& content,
328 const ContentInfo* old_content_one,
329 const ContentInfo* old_content_two) {
330 return type == SdpType::kOffer && !content.rejected &&
331 ((old_content_one && old_content_one->rejected) ||
332 (old_content_two && old_content_two->rejected));
333}
334
Steve Anton75737c02017-11-06 10:37:17 -0800335// Verify that the order of media sections in |new_desc| matches
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800336// |current_desc|. The number of m= sections in |new_desc| should be no
337// less than |current_desc|. In the case of checking an answer's
338// |new_desc|, the |current_desc| is the last offer that was set as the
339// local or remote. In the case of checking an offer's |new_desc| we
340// check against the local and remote descriptions stored from the last
341// negotiation, because either of these could be the most up to date for
342// possible rejected m sections. These are the |current_desc| and
343// |secondary_current_desc|.
344bool MediaSectionsInSameOrder(const SessionDescription& current_desc,
345 const SessionDescription* secondary_current_desc,
346 const SessionDescription& new_desc,
347 const SdpType type) {
348 if (current_desc.contents().size() > new_desc.contents().size()) {
Steve Anton75737c02017-11-06 10:37:17 -0800349 return false;
350 }
351
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800352 for (size_t i = 0; i < current_desc.contents().size(); ++i) {
353 const cricket::ContentInfo* secondary_content_info = nullptr;
354 if (secondary_current_desc &&
355 i < secondary_current_desc->contents().size()) {
356 secondary_content_info = &secondary_current_desc->contents()[i];
357 }
358 if (IsMediaSectionBeingRecycled(type, new_desc.contents()[i],
359 &current_desc.contents()[i],
360 secondary_content_info)) {
361 // For new offer descriptions, if the media section can be recycled, it's
362 // valid for the MID and media type to change.
Steve Antondcc3c022017-12-22 16:02:54 -0800363 continue;
364 }
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800365 if (new_desc.contents()[i].name != current_desc.contents()[i].name) {
Steve Anton75737c02017-11-06 10:37:17 -0800366 return false;
367 }
368 const MediaContentDescription* new_desc_mdesc =
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800369 new_desc.contents()[i].media_description();
370 const MediaContentDescription* current_desc_mdesc =
371 current_desc.contents()[i].media_description();
372 if (new_desc_mdesc->type() != current_desc_mdesc->type()) {
Steve Anton75737c02017-11-06 10:37:17 -0800373 return false;
374 }
375 }
376 return true;
377}
378
Seth Hampsonae8a90a2018-02-13 15:33:48 -0800379bool MediaSectionsHaveSameCount(const SessionDescription& desc1,
380 const SessionDescription& desc2) {
381 return desc1.contents().size() == desc2.contents().size();
Steve Anton75737c02017-11-06 10:37:17 -0800382}
383
Harald Alvestrandf9d0f1d2018-03-02 14:15:26 +0100384void NoteKeyProtocolAndMedia(
385 KeyExchangeProtocolType protocol_type,
386 cricket::MediaType media_type,
387 rtc::scoped_refptr<webrtc::UMAObserver> uma_observer) {
388 if (!uma_observer)
389 return;
390 uma_observer->IncrementEnumCounter(webrtc::kEnumCounterKeyProtocol,
391 protocol_type,
392 webrtc::kEnumCounterKeyProtocolMax);
393 static const std::map<std::pair<KeyExchangeProtocolType, cricket::MediaType>,
394 KeyExchangeProtocolMedia>
395 proto_media_counter_map = {
396 {{kEnumCounterKeyProtocolDtls, cricket::MEDIA_TYPE_AUDIO},
397 kEnumCounterKeyProtocolMediaTypeDtlsAudio},
398 {{kEnumCounterKeyProtocolDtls, cricket::MEDIA_TYPE_VIDEO},
399 kEnumCounterKeyProtocolMediaTypeDtlsVideo},
400 {{kEnumCounterKeyProtocolDtls, cricket::MEDIA_TYPE_DATA},
401 kEnumCounterKeyProtocolMediaTypeDtlsData},
402 {{kEnumCounterKeyProtocolSdes, cricket::MEDIA_TYPE_AUDIO},
403 kEnumCounterKeyProtocolMediaTypeSdesAudio},
404 {{kEnumCounterKeyProtocolSdes, cricket::MEDIA_TYPE_VIDEO},
405 kEnumCounterKeyProtocolMediaTypeSdesVideo},
406 {{kEnumCounterKeyProtocolSdes, cricket::MEDIA_TYPE_DATA},
407 kEnumCounterKeyProtocolMediaTypeSdesData}};
408
409 auto it = proto_media_counter_map.find({protocol_type, media_type});
410 if (it != proto_media_counter_map.end()) {
411 uma_observer->IncrementEnumCounter(webrtc::kEnumCounterKeyProtocolMediaType,
412 it->second,
413 kEnumCounterKeyProtocolMediaTypeMax);
414 }
415}
416
Steve Anton75737c02017-11-06 10:37:17 -0800417// Checks that each non-rejected content has SDES crypto keys or a DTLS
418// fingerprint, unless it's in a BUNDLE group, in which case only the
419// BUNDLE-tag section (first media section/description in the BUNDLE group)
420// needs a ufrag and pwd. Mismatches, such as replying with a DTLS fingerprint
421// to SDES keys, will be caught in JsepTransport negotiation, and backstopped
422// by Channel's |srtp_required| check.
Harald Alvestrand194939b2018-01-24 16:04:13 +0100423RTCError VerifyCrypto(const SessionDescription* desc,
424 bool dtls_enabled,
425 rtc::scoped_refptr<webrtc::UMAObserver> uma_observer) {
Steve Anton75737c02017-11-06 10:37:17 -0800426 const cricket::ContentGroup* bundle =
427 desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
Steve Anton8a006912017-12-04 15:25:56 -0800428 for (const cricket::ContentInfo& content_info : desc->contents()) {
429 if (content_info.rejected) {
Steve Anton75737c02017-11-06 10:37:17 -0800430 continue;
431 }
Harald Alvestrand2e180612018-03-07 10:56:14 +0100432 // Note what media is used with each crypto protocol, for all sections.
433 NoteKeyProtocolAndMedia(dtls_enabled ? webrtc::kEnumCounterKeyProtocolDtls
434 : webrtc::kEnumCounterKeyProtocolSdes,
435 content_info.media_description()->type(),
436 uma_observer);
Steve Anton8a006912017-12-04 15:25:56 -0800437 const std::string& mid = content_info.name;
438 if (bundle && bundle->HasContentName(mid) &&
439 mid != *(bundle->FirstContentName())) {
Steve Anton75737c02017-11-06 10:37:17 -0800440 // This isn't the first media section in the BUNDLE group, so it's not
441 // required to have crypto attributes, since only the crypto attributes
442 // from the first section actually get used.
443 continue;
444 }
445
446 // If the content isn't rejected or bundled into another m= section, crypto
447 // must be present.
Steve Antonb1c1de12017-12-21 15:14:30 -0800448 const MediaContentDescription* media = content_info.media_description();
Steve Anton8a006912017-12-04 15:25:56 -0800449 const TransportInfo* tinfo = desc->GetTransportInfoByName(mid);
Steve Anton75737c02017-11-06 10:37:17 -0800450 if (!media || !tinfo) {
451 // Something is not right.
Steve Anton8a006912017-12-04 15:25:56 -0800452 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, kInvalidSdp);
Steve Anton75737c02017-11-06 10:37:17 -0800453 }
454 if (dtls_enabled) {
455 if (!tinfo->description.identity_fingerprint) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100456 RTC_LOG(LS_WARNING)
457 << "Session description must have DTLS fingerprint if "
458 "DTLS enabled.";
Steve Anton8a006912017-12-04 15:25:56 -0800459 return RTCError(RTCErrorType::INVALID_PARAMETER,
460 kSdpWithoutDtlsFingerprint);
Steve Anton75737c02017-11-06 10:37:17 -0800461 }
462 } else {
463 if (media->cryptos().empty()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100464 RTC_LOG(LS_WARNING)
Steve Anton75737c02017-11-06 10:37:17 -0800465 << "Session description must have SDES when DTLS disabled.";
Steve Anton8a006912017-12-04 15:25:56 -0800466 return RTCError(RTCErrorType::INVALID_PARAMETER, kSdpWithoutSdesCrypto);
Steve Anton75737c02017-11-06 10:37:17 -0800467 }
468 }
469 }
Steve Anton8a006912017-12-04 15:25:56 -0800470 return RTCError::OK();
Steve Anton75737c02017-11-06 10:37:17 -0800471}
472
473// Checks that each non-rejected content has ice-ufrag and ice-pwd set, unless
474// it's in a BUNDLE group, in which case only the BUNDLE-tag section (first
475// media section/description in the BUNDLE group) needs a ufrag and pwd.
476bool VerifyIceUfragPwdPresent(const SessionDescription* desc) {
477 const cricket::ContentGroup* bundle =
478 desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
Steve Anton8a006912017-12-04 15:25:56 -0800479 for (const cricket::ContentInfo& content_info : desc->contents()) {
480 if (content_info.rejected) {
Steve Anton75737c02017-11-06 10:37:17 -0800481 continue;
482 }
Steve Anton8a006912017-12-04 15:25:56 -0800483 const std::string& mid = content_info.name;
484 if (bundle && bundle->HasContentName(mid) &&
485 mid != *(bundle->FirstContentName())) {
Steve Anton75737c02017-11-06 10:37:17 -0800486 // This isn't the first media section in the BUNDLE group, so it's not
487 // required to have ufrag/password, since only the ufrag/password from
488 // the first section actually get used.
489 continue;
490 }
491
492 // If the content isn't rejected or bundled into another m= section,
493 // ice-ufrag and ice-pwd must be present.
Steve Anton8a006912017-12-04 15:25:56 -0800494 const TransportInfo* tinfo = desc->GetTransportInfoByName(mid);
Steve Anton75737c02017-11-06 10:37:17 -0800495 if (!tinfo) {
496 // Something is not right.
Mirko Bonadei675513b2017-11-09 11:09:25 +0100497 RTC_LOG(LS_ERROR) << kInvalidSdp;
Steve Anton75737c02017-11-06 10:37:17 -0800498 return false;
499 }
500 if (tinfo->description.ice_ufrag.empty() ||
501 tinfo->description.ice_pwd.empty()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100502 RTC_LOG(LS_ERROR) << "Session description must have ice ufrag and pwd.";
Steve Anton75737c02017-11-06 10:37:17 -0800503 return false;
504 }
505 }
506 return true;
507}
508
509bool GetTrackIdBySsrc(const SessionDescription* session_description,
510 uint32_t ssrc,
511 std::string* track_id) {
512 RTC_DCHECK(track_id != NULL);
513
Steve Antonb1c1de12017-12-21 15:14:30 -0800514 const cricket::AudioContentDescription* audio_desc =
515 cricket::GetFirstAudioContentDescription(session_description);
516 if (audio_desc) {
517 const auto* found = cricket::GetStreamBySsrc(audio_desc->streams(), ssrc);
Steve Anton75737c02017-11-06 10:37:17 -0800518 if (found) {
519 *track_id = found->id;
520 return true;
521 }
522 }
523
Steve Antonb1c1de12017-12-21 15:14:30 -0800524 const cricket::VideoContentDescription* video_desc =
525 cricket::GetFirstVideoContentDescription(session_description);
526 if (video_desc) {
527 const auto* found = cricket::GetStreamBySsrc(video_desc->streams(), ssrc);
Steve Anton75737c02017-11-06 10:37:17 -0800528 if (found) {
529 *track_id = found->id;
530 return true;
531 }
532 }
533 return false;
534}
535
536// Get the SCTP port out of a SessionDescription.
537// Return -1 if not found.
538int GetSctpPort(const SessionDescription* session_description) {
Steve Antonb1c1de12017-12-21 15:14:30 -0800539 const cricket::DataContentDescription* data_desc =
540 GetFirstDataContentDescription(session_description);
541 RTC_DCHECK(data_desc);
542 if (!data_desc) {
Steve Anton75737c02017-11-06 10:37:17 -0800543 return -1;
544 }
Steve Anton75737c02017-11-06 10:37:17 -0800545 std::string value;
546 cricket::DataCodec match_pattern(cricket::kGoogleSctpDataCodecPlType,
547 cricket::kGoogleSctpDataCodecName);
Steve Antonb1c1de12017-12-21 15:14:30 -0800548 for (const cricket::DataCodec& codec : data_desc->codecs()) {
Steve Anton75737c02017-11-06 10:37:17 -0800549 if (!codec.Matches(match_pattern)) {
550 continue;
551 }
552 if (codec.GetParam(cricket::kCodecParamPort, &value)) {
553 return rtc::FromString<int>(value);
554 }
555 }
556 return -1;
557}
558
Steve Anton75737c02017-11-06 10:37:17 -0800559// Returns true if |new_desc| requests an ICE restart (i.e., new ufrag/pwd).
560bool CheckForRemoteIceRestart(const SessionDescriptionInterface* old_desc,
561 const SessionDescriptionInterface* new_desc,
562 const std::string& content_name) {
563 if (!old_desc) {
564 return false;
565 }
566 const SessionDescription* new_sd = new_desc->description();
567 const SessionDescription* old_sd = old_desc->description();
568 const ContentInfo* cinfo = new_sd->GetContentByName(content_name);
569 if (!cinfo || cinfo->rejected) {
570 return false;
571 }
572 // If the content isn't rejected, check if ufrag and password has changed.
573 const cricket::TransportDescription* new_transport_desc =
574 new_sd->GetTransportDescriptionByName(content_name);
575 const cricket::TransportDescription* old_transport_desc =
576 old_sd->GetTransportDescriptionByName(content_name);
577 if (!new_transport_desc || !old_transport_desc) {
578 // No transport description exists. This is not an ICE restart.
579 return false;
580 }
581 if (cricket::IceCredentialsChanged(
582 old_transport_desc->ice_ufrag, old_transport_desc->ice_pwd,
583 new_transport_desc->ice_ufrag, new_transport_desc->ice_pwd)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100584 RTC_LOG(LS_INFO) << "Remote peer requests ICE restart for " << content_name
585 << ".";
Steve Anton75737c02017-11-06 10:37:17 -0800586 return true;
587 }
588 return false;
589}
590
Steve Anton80dd7b52018-02-16 17:08:42 -0800591// Generates a string error message for SetLocalDescription/SetRemoteDescription
592// from an RTCError.
593std::string GetSetDescriptionErrorMessage(cricket::ContentSource source,
594 SdpType type,
595 const RTCError& error) {
596 std::ostringstream oss;
597 oss << "Failed to set " << (source == cricket::CS_LOCAL ? "local" : "remote")
598 << " " << SdpTypeToString(type) << " sdp: " << error.message();
599 return oss.str();
600}
601
Seth Hampson5b4f0752018-04-02 16:31:36 -0700602std::string GetStreamIdsString(rtc::ArrayView<const std::string> stream_ids) {
603 std::string output = "streams=[";
604 const char* separator = "";
605 for (const auto& stream_id : stream_ids) {
606 output.append(separator).append(stream_id);
607 separator = ", ";
608 }
609 output.append("]");
610 return output;
611}
612
Qingsi Wang866e08d2018-03-22 17:54:23 -0700613rtc::Optional<int> RTCConfigurationToIceConfigOptionalInt(
614 int rtc_configuration_parameter) {
615 if (rtc_configuration_parameter ==
616 webrtc::PeerConnectionInterface::RTCConfiguration::kUndefined) {
617 return rtc::nullopt;
618 }
619 return rtc_configuration_parameter;
620}
621
Steve Anton75737c02017-11-06 10:37:17 -0800622} // namespace
623
Henrik Boström31638672017-11-23 17:48:32 +0100624// Upon completion, posts a task to execute the callback of the
625// SetSessionDescriptionObserver asynchronously on the same thread. At this
626// point, the state of the peer connection might no longer reflect the effects
627// of the SetRemoteDescription operation, as the peer connection could have been
628// modified during the post.
629// TODO(hbos): Remove this class once we remove the version of
630// PeerConnectionInterface::SetRemoteDescription() that takes a
631// SetSessionDescriptionObserver as an argument.
632class PeerConnection::SetRemoteDescriptionObserverAdapter
633 : public rtc::RefCountedObject<SetRemoteDescriptionObserverInterface> {
634 public:
635 SetRemoteDescriptionObserverAdapter(
636 rtc::scoped_refptr<PeerConnection> pc,
637 rtc::scoped_refptr<SetSessionDescriptionObserver> wrapper)
638 : pc_(std::move(pc)), wrapper_(std::move(wrapper)) {}
639
640 // SetRemoteDescriptionObserverInterface implementation.
641 void OnSetRemoteDescriptionComplete(RTCError error) override {
642 if (error.ok())
643 pc_->PostSetSessionDescriptionSuccess(wrapper_);
644 else
Harald Alvestrand5081c0c2018-03-09 15:18:03 +0100645 pc_->PostSetSessionDescriptionFailure(wrapper_, std::move(error));
Henrik Boström31638672017-11-23 17:48:32 +0100646 }
647
648 private:
649 rtc::scoped_refptr<PeerConnection> pc_;
650 rtc::scoped_refptr<SetSessionDescriptionObserver> wrapper_;
651};
652
deadbeef293e9262017-01-11 12:28:30 -0800653bool PeerConnectionInterface::RTCConfiguration::operator==(
654 const PeerConnectionInterface::RTCConfiguration& o) const {
655 // This static_assert prevents us from accidentally breaking operator==.
Steve Anton300bf8e2017-07-14 10:13:10 -0700656 // Note: Order matters! Fields must be ordered the same as RTCConfiguration.
deadbeef293e9262017-01-11 12:28:30 -0800657 struct stuff_being_tested_for_equality {
Magnus Jedvert3beb2072017-07-14 14:23:56 +0000658 IceServers servers;
Steve Anton300bf8e2017-07-14 10:13:10 -0700659 IceTransportsType type;
deadbeef293e9262017-01-11 12:28:30 -0800660 BundlePolicy bundle_policy;
661 RtcpMuxPolicy rtcp_mux_policy;
Steve Anton300bf8e2017-07-14 10:13:10 -0700662 std::vector<rtc::scoped_refptr<rtc::RTCCertificate>> certificates;
663 int ice_candidate_pool_size;
664 bool disable_ipv6;
665 bool disable_ipv6_on_wifi;
deadbeefd21eab32017-07-26 16:50:11 -0700666 int max_ipv6_networks;
Daniel Lazarenko2870b0a2018-01-25 10:30:22 +0100667 bool disable_link_local_networks;
Steve Anton300bf8e2017-07-14 10:13:10 -0700668 bool enable_rtp_data_channel;
669 rtc::Optional<int> screencast_min_bitrate;
670 rtc::Optional<bool> combined_audio_video_bwe;
671 rtc::Optional<bool> enable_dtls_srtp;
deadbeef293e9262017-01-11 12:28:30 -0800672 TcpCandidatePolicy tcp_candidate_policy;
673 CandidateNetworkPolicy candidate_network_policy;
674 int audio_jitter_buffer_max_packets;
675 bool audio_jitter_buffer_fast_accelerate;
676 int ice_connection_receiving_timeout;
677 int ice_backup_candidate_pair_ping_interval;
678 ContinualGatheringPolicy continual_gathering_policy;
deadbeef293e9262017-01-11 12:28:30 -0800679 bool prioritize_most_likely_ice_candidate_pairs;
680 struct cricket::MediaConfig media_config;
deadbeef293e9262017-01-11 12:28:30 -0800681 bool prune_turn_ports;
682 bool presume_writable_when_fully_relayed;
683 bool enable_ice_renomination;
684 bool redetermine_role_on_ice_restart;
Qingsi Wange6826d22018-03-08 14:55:14 -0800685 rtc::Optional<int> ice_check_interval_strong_connectivity;
686 rtc::Optional<int> ice_check_interval_weak_connectivity;
skvlad51072462017-02-02 11:50:14 -0800687 rtc::Optional<int> ice_check_min_interval;
Qingsi Wang22e623a2018-03-13 10:53:57 -0700688 rtc::Optional<int> ice_unwritable_timeout;
689 rtc::Optional<int> ice_unwritable_min_checks;
Qingsi Wangdb53f8e2018-02-20 14:45:49 -0800690 rtc::Optional<int> stun_candidate_keepalive_interval;
Steve Anton300bf8e2017-07-14 10:13:10 -0700691 rtc::Optional<rtc::IntervalRange> ice_regather_interval_range;
Jonas Orelandbdcee282017-10-10 14:01:40 +0200692 webrtc::TurnCustomizer* turn_customizer;
Steve Anton79e79602017-11-20 10:25:56 -0800693 SdpSemantics sdp_semantics;
Qingsi Wang9a5c6f82018-02-01 10:38:40 -0800694 rtc::Optional<rtc::AdapterType> network_preference;
deadbeef293e9262017-01-11 12:28:30 -0800695 };
696 static_assert(sizeof(stuff_being_tested_for_equality) == sizeof(*this),
697 "Did you add something to RTCConfiguration and forget to "
698 "update operator==?");
699 return type == o.type && servers == o.servers &&
700 bundle_policy == o.bundle_policy &&
701 rtcp_mux_policy == o.rtcp_mux_policy &&
702 tcp_candidate_policy == o.tcp_candidate_policy &&
703 candidate_network_policy == o.candidate_network_policy &&
704 audio_jitter_buffer_max_packets == o.audio_jitter_buffer_max_packets &&
705 audio_jitter_buffer_fast_accelerate ==
706 o.audio_jitter_buffer_fast_accelerate &&
707 ice_connection_receiving_timeout ==
708 o.ice_connection_receiving_timeout &&
709 ice_backup_candidate_pair_ping_interval ==
710 o.ice_backup_candidate_pair_ping_interval &&
711 continual_gathering_policy == o.continual_gathering_policy &&
712 certificates == o.certificates &&
713 prioritize_most_likely_ice_candidate_pairs ==
714 o.prioritize_most_likely_ice_candidate_pairs &&
715 media_config == o.media_config && disable_ipv6 == o.disable_ipv6 &&
zhihuangb09b3f92017-03-07 14:40:51 -0800716 disable_ipv6_on_wifi == o.disable_ipv6_on_wifi &&
deadbeefd21eab32017-07-26 16:50:11 -0700717 max_ipv6_networks == o.max_ipv6_networks &&
Daniel Lazarenko2870b0a2018-01-25 10:30:22 +0100718 disable_link_local_networks == o.disable_link_local_networks &&
deadbeef293e9262017-01-11 12:28:30 -0800719 enable_rtp_data_channel == o.enable_rtp_data_channel &&
deadbeef293e9262017-01-11 12:28:30 -0800720 screencast_min_bitrate == o.screencast_min_bitrate &&
721 combined_audio_video_bwe == o.combined_audio_video_bwe &&
722 enable_dtls_srtp == o.enable_dtls_srtp &&
723 ice_candidate_pool_size == o.ice_candidate_pool_size &&
724 prune_turn_ports == o.prune_turn_ports &&
725 presume_writable_when_fully_relayed ==
726 o.presume_writable_when_fully_relayed &&
727 enable_ice_renomination == o.enable_ice_renomination &&
skvlad51072462017-02-02 11:50:14 -0800728 redetermine_role_on_ice_restart == o.redetermine_role_on_ice_restart &&
Qingsi Wange6826d22018-03-08 14:55:14 -0800729 ice_check_interval_strong_connectivity ==
730 o.ice_check_interval_strong_connectivity &&
731 ice_check_interval_weak_connectivity ==
732 o.ice_check_interval_weak_connectivity &&
Steve Anton300bf8e2017-07-14 10:13:10 -0700733 ice_check_min_interval == o.ice_check_min_interval &&
Qingsi Wang22e623a2018-03-13 10:53:57 -0700734 ice_unwritable_timeout == o.ice_unwritable_timeout &&
735 ice_unwritable_min_checks == o.ice_unwritable_min_checks &&
Qingsi Wangdb53f8e2018-02-20 14:45:49 -0800736 stun_candidate_keepalive_interval ==
737 o.stun_candidate_keepalive_interval &&
Jonas Orelandbdcee282017-10-10 14:01:40 +0200738 ice_regather_interval_range == o.ice_regather_interval_range &&
Steve Anton79e79602017-11-20 10:25:56 -0800739 turn_customizer == o.turn_customizer &&
Qingsi Wang9a5c6f82018-02-01 10:38:40 -0800740 sdp_semantics == o.sdp_semantics &&
741 network_preference == o.network_preference;
deadbeef293e9262017-01-11 12:28:30 -0800742}
743
744bool PeerConnectionInterface::RTCConfiguration::operator!=(
745 const PeerConnectionInterface::RTCConfiguration& o) const {
746 return !(*this == o);
deadbeef3edec7c2016-12-10 11:44:26 -0800747}
748
zhihuang8f65cdf2016-05-06 18:40:30 -0700749// Generate a RTCP CNAME when a PeerConnection is created.
750std::string GenerateRtcpCname() {
751 std::string cname;
752 if (!rtc::CreateRandomString(kRtcpCnameLength, &cname)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100753 RTC_LOG(LS_ERROR) << "Failed to generate CNAME.";
nisseeb4ca4e2017-01-12 02:24:27 -0800754 RTC_NOTREACHED();
zhihuang8f65cdf2016-05-06 18:40:30 -0700755 }
756 return cname;
757}
758
zhihuang1c378ed2017-08-17 14:10:50 -0700759bool ValidateOfferAnswerOptions(
760 const PeerConnectionInterface::RTCOfferAnswerOptions& rtc_options) {
761 return IsValidOfferToReceiveMedia(rtc_options.offer_to_receive_audio) &&
762 IsValidOfferToReceiveMedia(rtc_options.offer_to_receive_video);
olka3c747662017-08-17 06:50:32 -0700763}
764
zhihuang1c378ed2017-08-17 14:10:50 -0700765// From |rtc_options|, fill parts of |session_options| shared by all generated
766// m= sections (in other words, nothing that involves a map/array).
767void ExtractSharedMediaSessionOptions(
768 const PeerConnectionInterface::RTCOfferAnswerOptions& rtc_options,
769 cricket::MediaSessionOptions* session_options) {
770 session_options->vad_enabled = rtc_options.voice_activity_detection;
771 session_options->bundle_enabled = rtc_options.use_rtp_mux;
772}
zhihuanga77e6bb2017-08-14 18:17:48 -0700773
zhihuang1c378ed2017-08-17 14:10:50 -0700774bool ConvertConstraintsToOfferAnswerOptions(
775 const MediaConstraintsInterface* constraints,
776 PeerConnectionInterface::RTCOfferAnswerOptions* offer_answer_options) {
olka3c747662017-08-17 06:50:32 -0700777 if (!constraints) {
778 return true;
779 }
zhihuang1c378ed2017-08-17 14:10:50 -0700780
781 bool value = false;
782 size_t mandatory_constraints_satisfied = 0;
783
784 if (FindConstraint(constraints,
785 MediaConstraintsInterface::kOfferToReceiveAudio, &value,
786 &mandatory_constraints_satisfied)) {
787 offer_answer_options->offer_to_receive_audio =
788 value ? PeerConnectionInterface::RTCOfferAnswerOptions::
789 kOfferToReceiveMediaTrue
790 : 0;
791 }
792
793 if (FindConstraint(constraints,
794 MediaConstraintsInterface::kOfferToReceiveVideo, &value,
795 &mandatory_constraints_satisfied)) {
796 offer_answer_options->offer_to_receive_video =
797 value ? PeerConnectionInterface::RTCOfferAnswerOptions::
798 kOfferToReceiveMediaTrue
799 : 0;
800 }
801 if (FindConstraint(constraints,
802 MediaConstraintsInterface::kVoiceActivityDetection, &value,
803 &mandatory_constraints_satisfied)) {
804 offer_answer_options->voice_activity_detection = value;
805 }
806 if (FindConstraint(constraints, MediaConstraintsInterface::kUseRtpMux, &value,
807 &mandatory_constraints_satisfied)) {
808 offer_answer_options->use_rtp_mux = value;
809 }
810 if (FindConstraint(constraints, MediaConstraintsInterface::kIceRestart,
811 &value, &mandatory_constraints_satisfied)) {
812 offer_answer_options->ice_restart = value;
813 }
814
deadbeefab9b2d12015-10-14 11:33:11 -0700815 return mandatory_constraints_satisfied == constraints->GetMandatory().size();
816}
817
zhihuang38ede132017-06-15 12:52:32 -0700818PeerConnection::PeerConnection(PeerConnectionFactory* factory,
819 std::unique_ptr<RtcEventLog> event_log,
820 std::unique_ptr<Call> call)
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000821 : factory_(factory),
zhihuang38ede132017-06-15 12:52:32 -0700822 event_log_(std::move(event_log)),
zhihuang8f65cdf2016-05-06 18:40:30 -0700823 rtcp_cname_(GenerateRtcpCname()),
deadbeefab9b2d12015-10-14 11:33:11 -0700824 local_streams_(StreamCollection::Create()),
zhihuang38ede132017-06-15 12:52:32 -0700825 remote_streams_(StreamCollection::Create()),
826 call_(std::move(call)) {}
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000827
828PeerConnection::~PeerConnection() {
Peter Boström1a9d6152015-12-08 22:15:17 +0100829 TRACE_EVENT0("webrtc", "PeerConnection::~PeerConnection");
Steve Anton4171afb2017-11-20 10:20:22 -0800830 RTC_DCHECK_RUN_ON(signaling_thread());
831
Steve Anton8af21862017-12-15 11:20:13 -0800832 // Need to stop transceivers before destroying the stats collector because
833 // AudioRtpSender has a reference to the StatsCollector it will update when
834 // stopping.
835 for (auto transceiver : transceivers_) {
836 transceiver->Stop();
837 }
Steve Anton4171afb2017-11-20 10:20:22 -0800838
Taylor Brandstettera1c30352016-05-13 08:15:11 -0700839 stats_.reset(nullptr);
hbosb78306a2016-12-19 05:06:57 -0800840 if (stats_collector_) {
841 stats_collector_->WaitForPendingRequest();
842 stats_collector_ = nullptr;
843 }
Steve Anton75737c02017-11-06 10:37:17 -0800844
Steve Anton8af21862017-12-15 11:20:13 -0800845 // Don't destroy BaseChannels until after stats has been cleaned up so that
846 // the last stats request can still read from the channels.
847 DestroyAllChannels();
848
Mirko Bonadei675513b2017-11-09 11:09:25 +0100849 RTC_LOG(LS_INFO) << "Session: " << session_id() << " is destroyed.";
Steve Anton75737c02017-11-06 10:37:17 -0800850
851 webrtc_session_desc_factory_.reset();
852 sctp_invoker_.reset();
853 sctp_factory_.reset();
854 transport_controller_.reset();
855
deadbeef91dd5672016-05-18 16:55:30 -0700856 // port_allocator_ lives on the network thread and should be destroyed there.
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -0700857 network_thread()->Invoke<void>(RTC_FROM_HERE,
nisseeaabdf62017-05-05 02:23:02 -0700858 [this] { port_allocator_.reset(); });
eladalon248fd4f2017-09-06 05:18:15 -0700859 // call_ and event_log_ must be destroyed on the worker thread.
Steve Anton978b8762017-09-29 12:15:02 -0700860 worker_thread()->Invoke<void>(RTC_FROM_HERE, [this] {
eladalon248fd4f2017-09-06 05:18:15 -0700861 call_.reset();
Qingsi Wang93a84392018-01-30 17:13:09 -0800862 // The event log must outlive call (and any other object that uses it).
eladalon248fd4f2017-09-06 05:18:15 -0700863 event_log_.reset();
864 });
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000865}
866
Steve Anton8af21862017-12-15 11:20:13 -0800867void PeerConnection::DestroyAllChannels() {
Steve Anton3fe1b152017-12-12 10:20:08 -0800868 // Destroy video channels first since they may have a pointer to a voice
869 // channel.
870 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -0800871 if (transceiver->media_type() == cricket::MEDIA_TYPE_VIDEO) {
Steve Anton3fe1b152017-12-12 10:20:08 -0800872 DestroyTransceiverChannel(transceiver);
873 }
874 }
875 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -0800876 if (transceiver->media_type() == cricket::MEDIA_TYPE_AUDIO) {
Steve Anton3fe1b152017-12-12 10:20:08 -0800877 DestroyTransceiverChannel(transceiver);
878 }
879 }
880 DestroyDataChannel();
881}
882
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000883bool PeerConnection::Initialize(
buildbot@webrtc.org41451d42014-05-03 05:39:45 +0000884 const PeerConnectionInterface::RTCConfiguration& configuration,
kwibergd1fe2812016-04-27 06:47:29 -0700885 std::unique_ptr<cricket::PortAllocator> allocator,
Henrik Boströmd03c23b2016-06-01 11:44:18 +0200886 std::unique_ptr<rtc::RTCCertificateGeneratorInterface> cert_generator,
deadbeef653b8e02015-11-11 12:55:10 -0800887 PeerConnectionObserver* observer) {
Peter Boström1a9d6152015-12-08 22:15:17 +0100888 TRACE_EVENT0("webrtc", "PeerConnection::Initialize");
Steve Anton038834f2017-07-14 15:59:59 -0700889
890 RTCError config_error = ValidateConfiguration(configuration);
891 if (!config_error.ok()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100892 RTC_LOG(LS_ERROR) << "Invalid configuration: " << config_error.message();
Steve Anton038834f2017-07-14 15:59:59 -0700893 return false;
894 }
895
deadbeef293e9262017-01-11 12:28:30 -0800896 if (!allocator) {
Mirko Bonadei675513b2017-11-09 11:09:25 +0100897 RTC_LOG(LS_ERROR)
898 << "PeerConnection initialized without a PortAllocator? "
Jonas Olsson45cc8902018-02-13 10:37:07 +0100899 "This shouldn't happen if using PeerConnectionFactory.";
deadbeef293e9262017-01-11 12:28:30 -0800900 return false;
901 }
Jonas Orelandbdcee282017-10-10 14:01:40 +0200902
deadbeef653b8e02015-11-11 12:55:10 -0800903 if (!observer) {
deadbeef293e9262017-01-11 12:28:30 -0800904 // TODO(deadbeef): Why do we do this?
Mirko Bonadei675513b2017-11-09 11:09:25 +0100905 RTC_LOG(LS_ERROR) << "PeerConnection initialized without a "
Jonas Olsson45cc8902018-02-13 10:37:07 +0100906 "PeerConnectionObserver";
deadbeef653b8e02015-11-11 12:55:10 -0800907 return false;
908 }
pthatcher@webrtc.org877ac762015-02-04 22:03:09 +0000909 observer_ = observer;
kwiberg0eb15ed2015-12-17 03:04:15 -0800910 port_allocator_ = std::move(allocator);
deadbeef653b8e02015-11-11 12:55:10 -0800911
deadbeef91dd5672016-05-18 16:55:30 -0700912 // The port allocator lives on the network thread and should be initialized
Taylor Brandstettera1c30352016-05-13 08:15:11 -0700913 // there.
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -0700914 if (!network_thread()->Invoke<bool>(
915 RTC_FROM_HERE, rtc::Bind(&PeerConnection::InitializePortAllocator_n,
916 this, configuration))) {
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000917 return false;
918 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000919
Zhi Huange830e682018-03-30 10:48:35 -0700920 const PeerConnectionFactoryInterface::Options& options = factory_->options();
921
Steve Anton75737c02017-11-06 10:37:17 -0800922 // RFC 3264: The numeric value of the session id and version in the
923 // o line MUST be representable with a "64 bit signed integer".
924 // Due to this constraint session id |session_id_| is max limited to
925 // LLONG_MAX.
926 session_id_ = rtc::ToString(rtc::CreateRandomId64() & LLONG_MAX);
Zhi Huange830e682018-03-30 10:48:35 -0700927 JsepTransportController::Config config;
928 config.redetermine_role_on_ice_restart =
929 configuration.redetermine_role_on_ice_restart;
930 config.ssl_max_version = factory_->options().ssl_max_version;
931 config.disable_encryption = options.disable_encryption;
932 config.bundle_policy = configuration.bundle_policy;
933 config.rtcp_mux_policy = configuration.rtcp_mux_policy;
934 config.crypto_options = options.crypto_options;
Zhi Huang365381f2018-04-13 16:44:34 -0700935 config.transport_observer = this;
Zhi Huange830e682018-03-30 10:48:35 -0700936#if defined(ENABLE_EXTERNAL_AUTH)
937 config.enable_external_auth = true;
938#endif
939 transport_controller_.reset(new JsepTransportController(
940 signaling_thread(), network_thread(), port_allocator_.get(), config));
941 transport_controller_->SignalIceConnectionState.connect(
Steve Anton75737c02017-11-06 10:37:17 -0800942 this, &PeerConnection::OnTransportControllerConnectionState);
Zhi Huange830e682018-03-30 10:48:35 -0700943 transport_controller_->SignalIceGatheringState.connect(
Steve Anton75737c02017-11-06 10:37:17 -0800944 this, &PeerConnection::OnTransportControllerGatheringState);
Zhi Huange830e682018-03-30 10:48:35 -0700945 transport_controller_->SignalIceCandidatesGathered.connect(
Steve Anton75737c02017-11-06 10:37:17 -0800946 this, &PeerConnection::OnTransportControllerCandidatesGathered);
Zhi Huange830e682018-03-30 10:48:35 -0700947 transport_controller_->SignalIceCandidatesRemoved.connect(
Steve Anton75737c02017-11-06 10:37:17 -0800948 this, &PeerConnection::OnTransportControllerCandidatesRemoved);
949 transport_controller_->SignalDtlsHandshakeError.connect(
950 this, &PeerConnection::OnTransportControllerDtlsHandshakeError);
951
952 sctp_factory_ = factory_->CreateSctpTransportInternalFactory();
zhihuang29ff8442016-07-27 11:07:25 -0700953
deadbeefab9b2d12015-10-14 11:33:11 -0700954 stats_.reset(new StatsCollector(this));
hbos74e1a4f2016-09-15 23:33:01 -0700955 stats_collector_ = RTCStatsCollector::Create(this);
henrike@webrtc.org28e20752013-07-10 00:45:36 +0000956
Steve Antonba818672017-11-06 10:21:57 -0800957 configuration_ = configuration;
958
Steve Anton75737c02017-11-06 10:37:17 -0800959 // Obtain a certificate from RTCConfiguration if any were provided (optional).
960 rtc::scoped_refptr<rtc::RTCCertificate> certificate;
961 if (!configuration.certificates.empty()) {
962 // TODO(hbos,torbjorng): Decide on certificate-selection strategy instead of
963 // just picking the first one. The decision should be made based on the DTLS
964 // handshake. The DTLS negotiations need to know about all certificates.
965 certificate = configuration.certificates[0];
966 }
967
Steve Antond25da372017-11-06 14:50:29 -0800968 transport_controller_->SetIceConfig(ParseIceConfig(configuration));
Steve Anton75737c02017-11-06 10:37:17 -0800969
970 if (options.disable_encryption) {
971 dtls_enabled_ = false;
972 } else {
973 // Enable DTLS by default if we have an identity store or a certificate.
974 dtls_enabled_ = (cert_generator || certificate);
975 // |configuration| can override the default |dtls_enabled_| value.
976 if (configuration.enable_dtls_srtp) {
977 dtls_enabled_ = *(configuration.enable_dtls_srtp);
978 }
979 }
980
981 // Enable creation of RTP data channels if the kEnableRtpDataChannels is set.
982 // It takes precendence over the disable_sctp_data_channels
983 // PeerConnectionFactoryInterface::Options.
984 if (configuration.enable_rtp_data_channel) {
985 data_channel_type_ = cricket::DCT_RTP;
986 } else {
987 // DTLS has to be enabled to use SCTP.
988 if (!options.disable_sctp_data_channels && dtls_enabled_) {
989 data_channel_type_ = cricket::DCT_SCTP;
990 }
991 }
992
993 video_options_.screencast_min_bitrate_kbps =
994 configuration.screencast_min_bitrate;
995 audio_options_.combined_audio_video_bwe =
996 configuration.combined_audio_video_bwe;
997
998 audio_options_.audio_jitter_buffer_max_packets =
Oskar Sundbom9b28a032017-11-16 10:53:30 +0100999 configuration.audio_jitter_buffer_max_packets;
Steve Anton75737c02017-11-06 10:37:17 -08001000
1001 audio_options_.audio_jitter_buffer_fast_accelerate =
Oskar Sundbom9b28a032017-11-16 10:53:30 +01001002 configuration.audio_jitter_buffer_fast_accelerate;
Steve Anton75737c02017-11-06 10:37:17 -08001003
1004 // Whether the certificate generator/certificate is null or not determines
1005 // what PeerConnectionDescriptionFactory will do, so make sure that we give it
1006 // the right instructions by clearing the variables if needed.
1007 if (!dtls_enabled_) {
1008 cert_generator.reset();
1009 certificate = nullptr;
1010 } else if (certificate) {
1011 // Favor generated certificate over the certificate generator.
1012 cert_generator.reset();
1013 }
1014
1015 webrtc_session_desc_factory_.reset(new WebRtcSessionDescriptionFactory(
1016 signaling_thread(), channel_manager(), this, session_id(),
1017 std::move(cert_generator), certificate));
1018 webrtc_session_desc_factory_->SignalCertificateReady.connect(
1019 this, &PeerConnection::OnCertificateReady);
1020
1021 if (options.disable_encryption) {
1022 webrtc_session_desc_factory_->SetSdesPolicy(cricket::SEC_DISABLED);
1023 }
1024
1025 webrtc_session_desc_factory_->set_enable_encrypted_rtp_header_extensions(
1026 options.crypto_options.enable_encrypted_rtp_header_extensions);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001027
Steve Anton4171afb2017-11-20 10:20:22 -08001028 // Add default audio/video transceivers for Plan B SDP.
1029 if (!IsUnifiedPlan()) {
1030 transceivers_.push_back(
1031 RtpTransceiverProxyWithInternal<RtpTransceiver>::Create(
1032 signaling_thread(), new RtpTransceiver(cricket::MEDIA_TYPE_AUDIO)));
1033 transceivers_.push_back(
1034 RtpTransceiverProxyWithInternal<RtpTransceiver>::Create(
1035 signaling_thread(), new RtpTransceiver(cricket::MEDIA_TYPE_VIDEO)));
1036 }
1037
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001038 return true;
1039}
1040
Steve Anton038834f2017-07-14 15:59:59 -07001041RTCError PeerConnection::ValidateConfiguration(
1042 const RTCConfiguration& config) const {
1043 if (config.ice_regather_interval_range &&
1044 config.continual_gathering_policy == GATHER_ONCE) {
1045 return RTCError(RTCErrorType::INVALID_PARAMETER,
1046 "ice_regather_interval_range specified but continual "
1047 "gathering policy is GATHER_ONCE");
1048 }
Qingsi Wangdea68892018-03-27 10:55:21 -07001049 auto result =
1050 cricket::P2PTransportChannel::ValidateIceConfig(ParseIceConfig(config));
1051 return result;
Steve Anton038834f2017-07-14 15:59:59 -07001052}
1053
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00001054rtc::scoped_refptr<StreamCollectionInterface>
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001055PeerConnection::local_streams() {
Steve Antonfc853712018-03-01 13:48:58 -08001056 RTC_CHECK(!IsUnifiedPlan()) << "local_streams is not available with Unified "
1057 "Plan SdpSemantics. Please use GetSenders "
1058 "instead.";
deadbeefab9b2d12015-10-14 11:33:11 -07001059 return local_streams_;
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001060}
1061
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00001062rtc::scoped_refptr<StreamCollectionInterface>
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001063PeerConnection::remote_streams() {
Steve Antonfc853712018-03-01 13:48:58 -08001064 RTC_CHECK(!IsUnifiedPlan()) << "remote_streams is not available with Unified "
1065 "Plan SdpSemantics. Please use GetReceivers "
1066 "instead.";
deadbeefab9b2d12015-10-14 11:33:11 -07001067 return remote_streams_;
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001068}
1069
perkj@webrtc.orgc2dd5ee2014-11-04 11:31:29 +00001070bool PeerConnection::AddStream(MediaStreamInterface* local_stream) {
Steve Antonfc853712018-03-01 13:48:58 -08001071 RTC_CHECK(!IsUnifiedPlan()) << "AddStream is not available with Unified Plan "
1072 "SdpSemantics. Please use AddTrack instead.";
Peter Boström1a9d6152015-12-08 22:15:17 +01001073 TRACE_EVENT0("webrtc", "PeerConnection::AddStream");
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001074 if (IsClosed()) {
1075 return false;
1076 }
deadbeefab9b2d12015-10-14 11:33:11 -07001077 if (!CanAddLocalMediaStream(local_streams_, local_stream)) {
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001078 return false;
1079 }
deadbeefab9b2d12015-10-14 11:33:11 -07001080
1081 local_streams_->AddStream(local_stream);
deadbeefeb459812015-12-15 19:24:43 -08001082 MediaStreamObserver* observer = new MediaStreamObserver(local_stream);
1083 observer->SignalAudioTrackAdded.connect(this,
1084 &PeerConnection::OnAudioTrackAdded);
1085 observer->SignalAudioTrackRemoved.connect(
1086 this, &PeerConnection::OnAudioTrackRemoved);
1087 observer->SignalVideoTrackAdded.connect(this,
1088 &PeerConnection::OnVideoTrackAdded);
1089 observer->SignalVideoTrackRemoved.connect(
1090 this, &PeerConnection::OnVideoTrackRemoved);
kwibergd1fe2812016-04-27 06:47:29 -07001091 stream_observers_.push_back(std::unique_ptr<MediaStreamObserver>(observer));
deadbeefab9b2d12015-10-14 11:33:11 -07001092
deadbeefab9b2d12015-10-14 11:33:11 -07001093 for (const auto& track : local_stream->GetAudioTracks()) {
korniltsev.anatolyec390b52017-07-24 17:00:25 -07001094 AddAudioTrack(track.get(), local_stream);
deadbeefab9b2d12015-10-14 11:33:11 -07001095 }
1096 for (const auto& track : local_stream->GetVideoTracks()) {
korniltsev.anatolyec390b52017-07-24 17:00:25 -07001097 AddVideoTrack(track.get(), local_stream);
deadbeefab9b2d12015-10-14 11:33:11 -07001098 }
1099
tommi@webrtc.org03505bc2014-07-14 20:15:26 +00001100 stats_->AddStream(local_stream);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001101 observer_->OnRenegotiationNeeded();
1102 return true;
1103}
1104
1105void PeerConnection::RemoveStream(MediaStreamInterface* local_stream) {
Steve Antonfc853712018-03-01 13:48:58 -08001106 RTC_CHECK(!IsUnifiedPlan()) << "RemoveStream is not available with Unified "
1107 "Plan SdpSemantics. Please use RemoveTrack "
1108 "instead.";
Peter Boström1a9d6152015-12-08 22:15:17 +01001109 TRACE_EVENT0("webrtc", "PeerConnection::RemoveStream");
korniltsev.anatolyec390b52017-07-24 17:00:25 -07001110 if (!IsClosed()) {
1111 for (const auto& track : local_stream->GetAudioTracks()) {
1112 RemoveAudioTrack(track.get(), local_stream);
1113 }
1114 for (const auto& track : local_stream->GetVideoTracks()) {
1115 RemoveVideoTrack(track.get(), local_stream);
1116 }
deadbeefab9b2d12015-10-14 11:33:11 -07001117 }
deadbeefab9b2d12015-10-14 11:33:11 -07001118 local_streams_->RemoveStream(local_stream);
deadbeefeb459812015-12-15 19:24:43 -08001119 stream_observers_.erase(
1120 std::remove_if(
1121 stream_observers_.begin(), stream_observers_.end(),
kwibergd1fe2812016-04-27 06:47:29 -07001122 [local_stream](const std::unique_ptr<MediaStreamObserver>& observer) {
Seth Hampson13b8bad2018-03-13 16:05:28 -07001123 return observer->stream()->id().compare(local_stream->id()) == 0;
deadbeefeb459812015-12-15 19:24:43 -08001124 }),
1125 stream_observers_.end());
deadbeefab9b2d12015-10-14 11:33:11 -07001126
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001127 if (IsClosed()) {
1128 return;
1129 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001130 observer_->OnRenegotiationNeeded();
1131}
1132
deadbeefe1f9d832016-01-14 15:35:42 -08001133rtc::scoped_refptr<RtpSenderInterface> PeerConnection::AddTrack(
1134 MediaStreamTrackInterface* track,
1135 std::vector<MediaStreamInterface*> streams) {
1136 TRACE_EVENT0("webrtc", "PeerConnection::AddTrack");
Seth Hampson845e8782018-03-02 11:34:10 -08001137 std::vector<std::string> stream_ids;
Steve Antonf9381f02017-12-14 10:23:57 -08001138 for (auto* stream : streams) {
1139 if (!stream) {
1140 RTC_LOG(LS_ERROR) << "Stream list has null element.";
1141 return nullptr;
1142 }
Seth Hampson13b8bad2018-03-13 16:05:28 -07001143 stream_ids.push_back(stream->id());
Steve Antonf9381f02017-12-14 10:23:57 -08001144 }
Seth Hampson845e8782018-03-02 11:34:10 -08001145 auto sender_or_error = AddTrack(track, stream_ids);
Steve Antonf9381f02017-12-14 10:23:57 -08001146 if (!sender_or_error.ok()) {
deadbeefe1f9d832016-01-14 15:35:42 -08001147 return nullptr;
1148 }
Steve Antonf9381f02017-12-14 10:23:57 -08001149 return sender_or_error.MoveValue();
1150}
1151
Steve Anton2d6c76a2018-01-05 17:10:52 -08001152RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> PeerConnection::AddTrack(
Steve Antonf9381f02017-12-14 10:23:57 -08001153 rtc::scoped_refptr<MediaStreamTrackInterface> track,
Seth Hampson845e8782018-03-02 11:34:10 -08001154 const std::vector<std::string>& stream_ids) {
Steve Anton2d6c76a2018-01-05 17:10:52 -08001155 TRACE_EVENT0("webrtc", "PeerConnection::AddTrack");
Steve Antonf9381f02017-12-14 10:23:57 -08001156 if (!track) {
1157 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, "Track is null.");
1158 }
1159 if (!(track->kind() == MediaStreamTrackInterface::kAudioKind ||
1160 track->kind() == MediaStreamTrackInterface::kVideoKind)) {
1161 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
1162 "Track has invalid kind: " + track->kind());
1163 }
Steve Antonf9381f02017-12-14 10:23:57 -08001164 if (IsClosed()) {
1165 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_STATE,
1166 "PeerConnection is closed.");
deadbeefe1f9d832016-01-14 15:35:42 -08001167 }
Steve Anton4171afb2017-11-20 10:20:22 -08001168 if (FindSenderForTrack(track)) {
Steve Antonf9381f02017-12-14 10:23:57 -08001169 LOG_AND_RETURN_ERROR(
1170 RTCErrorType::INVALID_PARAMETER,
1171 "Sender already exists for track " + track->id() + ".");
deadbeefe1f9d832016-01-14 15:35:42 -08001172 }
Steve Antonf9381f02017-12-14 10:23:57 -08001173 auto sender_or_error =
Seth Hampson5b4f0752018-04-02 16:31:36 -07001174 (IsUnifiedPlan() ? AddTrackUnifiedPlan(track, stream_ids)
1175 : AddTrackPlanB(track, stream_ids));
Steve Antonf9381f02017-12-14 10:23:57 -08001176 if (sender_or_error.ok()) {
1177 observer_->OnRenegotiationNeeded();
Steve Anton43a723a2018-01-04 15:48:17 -08001178 stats_->AddTrack(track);
Steve Antonf9381f02017-12-14 10:23:57 -08001179 }
1180 return sender_or_error;
1181}
deadbeefe1f9d832016-01-14 15:35:42 -08001182
Steve Antonf9381f02017-12-14 10:23:57 -08001183RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>>
1184PeerConnection::AddTrackPlanB(
1185 rtc::scoped_refptr<MediaStreamTrackInterface> track,
Seth Hampson845e8782018-03-02 11:34:10 -08001186 const std::vector<std::string>& stream_ids) {
Seth Hampson5b4f0752018-04-02 16:31:36 -07001187 if (stream_ids.size() > 1u) {
1188 LOG_AND_RETURN_ERROR(RTCErrorType::UNSUPPORTED_OPERATION,
1189 "AddTrack with more than one stream is not "
1190 "supported with Plan B semantics.");
1191 }
1192 std::vector<std::string> adjusted_stream_ids = stream_ids;
1193 if (adjusted_stream_ids.empty()) {
1194 adjusted_stream_ids.push_back(rtc::CreateRandomUuid());
1195 }
Steve Anton02ee47c2018-01-10 16:26:06 -08001196 cricket::MediaType media_type =
1197 (track->kind() == MediaStreamTrackInterface::kAudioKind
1198 ? cricket::MEDIA_TYPE_AUDIO
1199 : cricket::MEDIA_TYPE_VIDEO);
Seth Hampson5b4f0752018-04-02 16:31:36 -07001200 auto new_sender = CreateSender(media_type, track, adjusted_stream_ids);
deadbeefe1f9d832016-01-14 15:35:42 -08001201 if (track->kind() == MediaStreamTrackInterface::kAudioKind) {
Steve Anton57858b32018-02-15 15:19:50 -08001202 new_sender->internal()->SetVoiceMediaChannel(voice_media_channel());
Steve Anton4171afb2017-11-20 10:20:22 -08001203 GetAudioTransceiver()->internal()->AddSender(new_sender);
Steve Anton4171afb2017-11-20 10:20:22 -08001204 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00001205 FindSenderInfo(local_audio_sender_infos_,
Seth Hampson5b4f0752018-04-02 16:31:36 -07001206 new_sender->internal()->stream_ids()[0], track->id());
Steve Anton4171afb2017-11-20 10:20:22 -08001207 if (sender_info) {
1208 new_sender->internal()->SetSsrc(sender_info->first_ssrc);
deadbeefe1f9d832016-01-14 15:35:42 -08001209 }
Steve Antonf9381f02017-12-14 10:23:57 -08001210 } else {
1211 RTC_DCHECK_EQ(MediaStreamTrackInterface::kVideoKind, track->kind());
Steve Anton57858b32018-02-15 15:19:50 -08001212 new_sender->internal()->SetVideoMediaChannel(video_media_channel());
Steve Anton4171afb2017-11-20 10:20:22 -08001213 GetVideoTransceiver()->internal()->AddSender(new_sender);
Steve Anton4171afb2017-11-20 10:20:22 -08001214 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00001215 FindSenderInfo(local_video_sender_infos_,
Seth Hampson5b4f0752018-04-02 16:31:36 -07001216 new_sender->internal()->stream_ids()[0], track->id());
Steve Anton4171afb2017-11-20 10:20:22 -08001217 if (sender_info) {
1218 new_sender->internal()->SetSsrc(sender_info->first_ssrc);
deadbeefe1f9d832016-01-14 15:35:42 -08001219 }
deadbeefe1f9d832016-01-14 15:35:42 -08001220 }
Steve Anton02ee47c2018-01-10 16:26:06 -08001221 return rtc::scoped_refptr<RtpSenderInterface>(new_sender);
Steve Antonf9381f02017-12-14 10:23:57 -08001222}
deadbeefe1f9d832016-01-14 15:35:42 -08001223
Steve Antonf9381f02017-12-14 10:23:57 -08001224RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>>
1225PeerConnection::AddTrackUnifiedPlan(
1226 rtc::scoped_refptr<MediaStreamTrackInterface> track,
Seth Hampson845e8782018-03-02 11:34:10 -08001227 const std::vector<std::string>& stream_ids) {
Steve Antonf9381f02017-12-14 10:23:57 -08001228 auto transceiver = FindFirstTransceiverForAddedTrack(track);
1229 if (transceiver) {
Steve Anton3d954a62018-04-02 11:27:23 -07001230 RTC_LOG(LS_INFO) << "Reusing an existing "
1231 << cricket::MediaTypeToString(transceiver->media_type())
1232 << " transceiver for AddTrack.";
Steve Antonf9381f02017-12-14 10:23:57 -08001233 if (transceiver->direction() == RtpTransceiverDirection::kRecvOnly) {
Steve Anton52d86772018-02-20 15:48:12 -08001234 transceiver->internal()->set_direction(
1235 RtpTransceiverDirection::kSendRecv);
Steve Antonf9381f02017-12-14 10:23:57 -08001236 } else if (transceiver->direction() == RtpTransceiverDirection::kInactive) {
Steve Anton52d86772018-02-20 15:48:12 -08001237 transceiver->internal()->set_direction(
1238 RtpTransceiverDirection::kSendOnly);
Steve Antonf9381f02017-12-14 10:23:57 -08001239 }
Steve Anton02ee47c2018-01-10 16:26:06 -08001240 transceiver->sender()->SetTrack(track);
Seth Hampson845e8782018-03-02 11:34:10 -08001241 transceiver->internal()->sender_internal()->set_stream_ids(stream_ids);
Steve Antonf9381f02017-12-14 10:23:57 -08001242 } else {
1243 cricket::MediaType media_type =
1244 (track->kind() == MediaStreamTrackInterface::kAudioKind
1245 ? cricket::MEDIA_TYPE_AUDIO
1246 : cricket::MEDIA_TYPE_VIDEO);
Steve Anton3d954a62018-04-02 11:27:23 -07001247 RTC_LOG(LS_INFO) << "Adding " << cricket::MediaTypeToString(media_type)
1248 << " transceiver in response to a call to AddTrack.";
Seth Hampson845e8782018-03-02 11:34:10 -08001249 auto sender = CreateSender(media_type, track, stream_ids);
Steve Anton02ee47c2018-01-10 16:26:06 -08001250 auto receiver = CreateReceiver(media_type, rtc::CreateRandomUuid());
1251 transceiver = CreateAndAddTransceiver(sender, receiver);
Steve Antonf9381f02017-12-14 10:23:57 -08001252 transceiver->internal()->set_created_by_addtrack(true);
Steve Anton52d86772018-02-20 15:48:12 -08001253 transceiver->internal()->set_direction(RtpTransceiverDirection::kSendRecv);
Steve Antonf9381f02017-12-14 10:23:57 -08001254 }
Steve Antonf9381f02017-12-14 10:23:57 -08001255 return transceiver->sender();
1256}
1257
1258rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
1259PeerConnection::FindFirstTransceiverForAddedTrack(
1260 rtc::scoped_refptr<MediaStreamTrackInterface> track) {
1261 RTC_DCHECK(track);
1262 for (auto transceiver : transceivers_) {
1263 if (!transceiver->sender()->track() &&
Steve Anton69470252018-02-09 11:43:08 -08001264 cricket::MediaTypeToString(transceiver->media_type()) ==
Steve Antonf9381f02017-12-14 10:23:57 -08001265 track->kind() &&
Seth Hampson2f0d7022018-02-20 11:54:42 -08001266 !transceiver->internal()->has_ever_been_used_to_send() &&
1267 !transceiver->stopped()) {
Steve Antonf9381f02017-12-14 10:23:57 -08001268 return transceiver;
1269 }
1270 }
1271 return nullptr;
deadbeefe1f9d832016-01-14 15:35:42 -08001272}
1273
1274bool PeerConnection::RemoveTrack(RtpSenderInterface* sender) {
1275 TRACE_EVENT0("webrtc", "PeerConnection::RemoveTrack");
Steve Antonf9381f02017-12-14 10:23:57 -08001276 return RemoveTrackInternal(sender).ok();
1277}
1278
1279RTCError PeerConnection::RemoveTrackInternal(
1280 rtc::scoped_refptr<RtpSenderInterface> sender) {
1281 if (!sender) {
1282 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, "Sender is null.");
1283 }
deadbeefe1f9d832016-01-14 15:35:42 -08001284 if (IsClosed()) {
Steve Antonf9381f02017-12-14 10:23:57 -08001285 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_STATE,
1286 "PeerConnection is closed.");
deadbeefe1f9d832016-01-14 15:35:42 -08001287 }
Steve Antonf9381f02017-12-14 10:23:57 -08001288 if (IsUnifiedPlan()) {
1289 auto transceiver = FindTransceiverBySender(sender);
1290 if (!transceiver || !sender->track()) {
1291 return RTCError::OK();
1292 }
1293 sender->SetTrack(nullptr);
1294 if (transceiver->direction() == RtpTransceiverDirection::kSendRecv) {
Steve Anton52d86772018-02-20 15:48:12 -08001295 transceiver->internal()->set_direction(
1296 RtpTransceiverDirection::kRecvOnly);
Steve Antonf9381f02017-12-14 10:23:57 -08001297 } else if (transceiver->direction() == RtpTransceiverDirection::kSendOnly) {
Steve Anton52d86772018-02-20 15:48:12 -08001298 transceiver->internal()->set_direction(
1299 RtpTransceiverDirection::kInactive);
Steve Antonf9381f02017-12-14 10:23:57 -08001300 }
Steve Anton4171afb2017-11-20 10:20:22 -08001301 } else {
Steve Antonf9381f02017-12-14 10:23:57 -08001302 bool removed;
1303 if (sender->media_type() == cricket::MEDIA_TYPE_AUDIO) {
1304 removed = GetAudioTransceiver()->internal()->RemoveSender(sender);
1305 } else {
1306 RTC_DCHECK_EQ(cricket::MEDIA_TYPE_VIDEO, sender->media_type());
1307 removed = GetVideoTransceiver()->internal()->RemoveSender(sender);
1308 }
1309 if (!removed) {
1310 LOG_AND_RETURN_ERROR(
1311 RTCErrorType::INVALID_PARAMETER,
1312 "Couldn't find sender " + sender->id() + " to remove.");
1313 }
Steve Anton4171afb2017-11-20 10:20:22 -08001314 }
deadbeefe1f9d832016-01-14 15:35:42 -08001315 observer_->OnRenegotiationNeeded();
Steve Antonf9381f02017-12-14 10:23:57 -08001316 return RTCError::OK();
1317}
1318
1319rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
1320PeerConnection::FindTransceiverBySender(
1321 rtc::scoped_refptr<RtpSenderInterface> sender) {
1322 for (auto transceiver : transceivers_) {
1323 if (transceiver->sender() == sender) {
1324 return transceiver;
1325 }
1326 }
1327 return nullptr;
deadbeefe1f9d832016-01-14 15:35:42 -08001328}
1329
Steve Anton9158ef62017-11-27 13:01:52 -08001330RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>
1331PeerConnection::AddTransceiver(
1332 rtc::scoped_refptr<MediaStreamTrackInterface> track) {
1333 return AddTransceiver(track, RtpTransceiverInit());
1334}
1335
1336RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>
1337PeerConnection::AddTransceiver(
1338 rtc::scoped_refptr<MediaStreamTrackInterface> track,
1339 const RtpTransceiverInit& init) {
Steve Antonfc853712018-03-01 13:48:58 -08001340 RTC_CHECK(IsUnifiedPlan())
1341 << "AddTransceiver is only available with Unified Plan SdpSemantics";
Steve Anton9158ef62017-11-27 13:01:52 -08001342 if (!track) {
1343 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, "track is null");
1344 }
1345 cricket::MediaType media_type;
1346 if (track->kind() == MediaStreamTrackInterface::kAudioKind) {
1347 media_type = cricket::MEDIA_TYPE_AUDIO;
1348 } else if (track->kind() == MediaStreamTrackInterface::kVideoKind) {
1349 media_type = cricket::MEDIA_TYPE_VIDEO;
1350 } else {
1351 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
1352 "Track kind is not audio or video");
1353 }
1354 return AddTransceiver(media_type, track, init);
1355}
1356
1357RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>
1358PeerConnection::AddTransceiver(cricket::MediaType media_type) {
1359 return AddTransceiver(media_type, RtpTransceiverInit());
1360}
1361
1362RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>
1363PeerConnection::AddTransceiver(cricket::MediaType media_type,
1364 const RtpTransceiverInit& init) {
Steve Antonfc853712018-03-01 13:48:58 -08001365 RTC_CHECK(IsUnifiedPlan())
1366 << "AddTransceiver is only available with Unified Plan SdpSemantics";
Steve Anton9158ef62017-11-27 13:01:52 -08001367 if (!(media_type == cricket::MEDIA_TYPE_AUDIO ||
1368 media_type == cricket::MEDIA_TYPE_VIDEO)) {
1369 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
1370 "media type is not audio or video");
1371 }
1372 return AddTransceiver(media_type, nullptr, init);
1373}
1374
1375RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>>
1376PeerConnection::AddTransceiver(
1377 cricket::MediaType media_type,
1378 rtc::scoped_refptr<MediaStreamTrackInterface> track,
Steve Anton22da89f2018-01-25 13:58:07 -08001379 const RtpTransceiverInit& init,
1380 bool fire_callback) {
Steve Anton9158ef62017-11-27 13:01:52 -08001381 RTC_DCHECK((media_type == cricket::MEDIA_TYPE_AUDIO ||
1382 media_type == cricket::MEDIA_TYPE_VIDEO));
1383 if (track) {
1384 RTC_DCHECK_EQ(media_type,
1385 (track->kind() == MediaStreamTrackInterface::kAudioKind
1386 ? cricket::MEDIA_TYPE_AUDIO
1387 : cricket::MEDIA_TYPE_VIDEO));
1388 }
1389
1390 // TODO(bugs.webrtc.org/7600): Verify init.
1391
Steve Anton3d954a62018-04-02 11:27:23 -07001392 RTC_LOG(LS_INFO) << "Adding " << cricket::MediaTypeToString(media_type)
1393 << " transceiver in response to a call to AddTransceiver.";
Seth Hampson5b4f0752018-04-02 16:31:36 -07001394 auto sender = CreateSender(media_type, track, init.stream_ids);
Steve Anton02ee47c2018-01-10 16:26:06 -08001395 auto receiver = CreateReceiver(media_type, rtc::CreateRandomUuid());
1396 auto transceiver = CreateAndAddTransceiver(sender, receiver);
1397 transceiver->internal()->set_direction(init.direction);
1398
Steve Anton22da89f2018-01-25 13:58:07 -08001399 if (fire_callback) {
1400 observer_->OnRenegotiationNeeded();
1401 }
Steve Antonf9381f02017-12-14 10:23:57 -08001402
1403 return rtc::scoped_refptr<RtpTransceiverInterface>(transceiver);
1404}
1405
Steve Anton02ee47c2018-01-10 16:26:06 -08001406rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>
1407PeerConnection::CreateSender(
1408 cricket::MediaType media_type,
1409 rtc::scoped_refptr<MediaStreamTrackInterface> track,
Seth Hampson845e8782018-03-02 11:34:10 -08001410 const std::vector<std::string>& stream_ids) {
Steve Anton9158ef62017-11-27 13:01:52 -08001411 rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> sender;
Steve Anton02ee47c2018-01-10 16:26:06 -08001412 if (media_type == cricket::MEDIA_TYPE_AUDIO) {
1413 RTC_DCHECK(!track ||
1414 (track->kind() == MediaStreamTrackInterface::kAudioKind));
1415 sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
1416 signaling_thread(),
Steve Anton47136dd2018-01-12 10:49:35 -08001417 new AudioRtpSender(worker_thread(),
1418 static_cast<AudioTrackInterface*>(track.get()),
Seth Hampson845e8782018-03-02 11:34:10 -08001419 stream_ids, stats_.get()));
Steve Anton02ee47c2018-01-10 16:26:06 -08001420 } else {
1421 RTC_DCHECK_EQ(media_type, cricket::MEDIA_TYPE_VIDEO);
1422 RTC_DCHECK(!track ||
1423 (track->kind() == MediaStreamTrackInterface::kVideoKind));
1424 sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
1425 signaling_thread(),
Steve Anton47136dd2018-01-12 10:49:35 -08001426 new VideoRtpSender(worker_thread(),
1427 static_cast<VideoTrackInterface*>(track.get()),
Seth Hampson845e8782018-03-02 11:34:10 -08001428 stream_ids));
Steve Anton02ee47c2018-01-10 16:26:06 -08001429 }
Seth Hampson845e8782018-03-02 11:34:10 -08001430 sender->internal()->set_stream_ids(stream_ids);
Steve Anton02ee47c2018-01-10 16:26:06 -08001431 return sender;
1432}
1433
1434rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>
1435PeerConnection::CreateReceiver(cricket::MediaType media_type,
1436 const std::string& receiver_id) {
Steve Anton9158ef62017-11-27 13:01:52 -08001437 rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>
1438 receiver;
Steve Anton9158ef62017-11-27 13:01:52 -08001439 if (media_type == cricket::MEDIA_TYPE_AUDIO) {
Steve Anton9158ef62017-11-27 13:01:52 -08001440 receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
Steve Anton60776752018-01-10 11:51:34 -08001441 signaling_thread(),
Steve Antond3679212018-01-17 17:41:02 -08001442 new AudioRtpReceiver(worker_thread(), receiver_id, {}));
Steve Anton9158ef62017-11-27 13:01:52 -08001443 } else {
Steve Anton02ee47c2018-01-10 16:26:06 -08001444 RTC_DCHECK_EQ(media_type, cricket::MEDIA_TYPE_VIDEO);
Steve Anton9158ef62017-11-27 13:01:52 -08001445 receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
1446 signaling_thread(),
Steve Antond3679212018-01-17 17:41:02 -08001447 new VideoRtpReceiver(worker_thread(), receiver_id, {}));
Steve Anton9158ef62017-11-27 13:01:52 -08001448 }
Steve Anton02ee47c2018-01-10 16:26:06 -08001449 return receiver;
1450}
1451
1452rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
1453PeerConnection::CreateAndAddTransceiver(
1454 rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> sender,
1455 rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>
1456 receiver) {
1457 auto transceiver = RtpTransceiverProxyWithInternal<RtpTransceiver>::Create(
1458 signaling_thread(), new RtpTransceiver(sender, receiver));
Steve Anton9158ef62017-11-27 13:01:52 -08001459 transceivers_.push_back(transceiver);
Steve Anton52d86772018-02-20 15:48:12 -08001460 transceiver->internal()->SignalNegotiationNeeded.connect(
1461 this, &PeerConnection::OnNegotiationNeeded);
Steve Antonf9381f02017-12-14 10:23:57 -08001462 return transceiver;
Steve Anton9158ef62017-11-27 13:01:52 -08001463}
1464
Steve Anton52d86772018-02-20 15:48:12 -08001465void PeerConnection::OnNegotiationNeeded() {
1466 RTC_DCHECK_RUN_ON(signaling_thread());
1467 RTC_DCHECK(!IsClosed());
1468 observer_->OnRenegotiationNeeded();
1469}
1470
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00001471rtc::scoped_refptr<DtmfSenderInterface> PeerConnection::CreateDtmfSender(
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001472 AudioTrackInterface* track) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001473 TRACE_EVENT0("webrtc", "PeerConnection::CreateDtmfSender");
zhihuang29ff8442016-07-27 11:07:25 -07001474 if (IsClosed()) {
1475 return nullptr;
1476 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001477 if (!track) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001478 RTC_LOG(LS_ERROR) << "CreateDtmfSender - track is NULL.";
deadbeef20cb0c12017-02-01 20:27:00 -08001479 return nullptr;
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001480 }
Steve Anton4171afb2017-11-20 10:20:22 -08001481 auto track_sender = FindSenderForTrack(track);
1482 if (!track_sender) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001483 RTC_LOG(LS_ERROR) << "CreateDtmfSender called with a non-added track.";
deadbeef20cb0c12017-02-01 20:27:00 -08001484 return nullptr;
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001485 }
1486
Steve Anton4171afb2017-11-20 10:20:22 -08001487 return track_sender->GetDtmfSender();
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001488}
1489
deadbeeffac06552015-11-25 11:26:01 -08001490rtc::scoped_refptr<RtpSenderInterface> PeerConnection::CreateSender(
deadbeefbd7d8f72015-12-18 16:58:44 -08001491 const std::string& kind,
1492 const std::string& stream_id) {
Steve Antonfc853712018-03-01 13:48:58 -08001493 RTC_CHECK(!IsUnifiedPlan()) << "CreateSender is not available with Unified "
1494 "Plan SdpSemantics. Please use AddTransceiver "
1495 "instead.";
Peter Boström1a9d6152015-12-08 22:15:17 +01001496 TRACE_EVENT0("webrtc", "PeerConnection::CreateSender");
zhihuang29ff8442016-07-27 11:07:25 -07001497 if (IsClosed()) {
1498 return nullptr;
1499 }
Steve Anton4171afb2017-11-20 10:20:22 -08001500
Seth Hampson5b4f0752018-04-02 16:31:36 -07001501 // Internally we need to have one stream with Plan B semantics, so we
1502 // generate a random stream ID if not specified.
Seth Hampson845e8782018-03-02 11:34:10 -08001503 std::vector<std::string> stream_ids;
Seth Hampson5b4f0752018-04-02 16:31:36 -07001504 if (stream_id.empty()) {
1505 stream_ids.push_back(rtc::CreateRandomUuid());
1506 RTC_LOG(LS_INFO)
1507 << "No stream_id specified for sender. Generated stream ID: "
1508 << stream_ids[0];
1509 } else {
Seth Hampson845e8782018-03-02 11:34:10 -08001510 stream_ids.push_back(stream_id);
Steve Anton02ee47c2018-01-10 16:26:06 -08001511 }
1512
Steve Anton4171afb2017-11-20 10:20:22 -08001513 // TODO(steveanton): Move construction of the RtpSenders to RtpTransceiver.
deadbeefa601f5c2016-06-06 14:27:39 -07001514 rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>> new_sender;
deadbeeffac06552015-11-25 11:26:01 -08001515 if (kind == MediaStreamTrackInterface::kAudioKind) {
Seth Hampson845e8782018-03-02 11:34:10 -08001516 auto* audio_sender =
1517 new AudioRtpSender(worker_thread(), nullptr, stream_ids, stats_.get());
Steve Anton57858b32018-02-15 15:19:50 -08001518 audio_sender->SetVoiceMediaChannel(voice_media_channel());
deadbeefa601f5c2016-06-06 14:27:39 -07001519 new_sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
Steve Anton02ee47c2018-01-10 16:26:06 -08001520 signaling_thread(), audio_sender);
Steve Anton4171afb2017-11-20 10:20:22 -08001521 GetAudioTransceiver()->internal()->AddSender(new_sender);
deadbeeffac06552015-11-25 11:26:01 -08001522 } else if (kind == MediaStreamTrackInterface::kVideoKind) {
Steve Anton47136dd2018-01-12 10:49:35 -08001523 auto* video_sender =
Seth Hampson845e8782018-03-02 11:34:10 -08001524 new VideoRtpSender(worker_thread(), nullptr, stream_ids);
Steve Anton57858b32018-02-15 15:19:50 -08001525 video_sender->SetVideoMediaChannel(video_media_channel());
deadbeefa601f5c2016-06-06 14:27:39 -07001526 new_sender = RtpSenderProxyWithInternal<RtpSenderInternal>::Create(
Steve Anton02ee47c2018-01-10 16:26:06 -08001527 signaling_thread(), video_sender);
Steve Anton4171afb2017-11-20 10:20:22 -08001528 GetVideoTransceiver()->internal()->AddSender(new_sender);
deadbeeffac06552015-11-25 11:26:01 -08001529 } else {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001530 RTC_LOG(LS_ERROR) << "CreateSender called with invalid kind: " << kind;
Steve Anton4171afb2017-11-20 10:20:22 -08001531 return nullptr;
deadbeeffac06552015-11-25 11:26:01 -08001532 }
Steve Anton4171afb2017-11-20 10:20:22 -08001533
deadbeefe1f9d832016-01-14 15:35:42 -08001534 return new_sender;
deadbeeffac06552015-11-25 11:26:01 -08001535}
1536
deadbeef70ab1a12015-09-28 16:53:55 -07001537std::vector<rtc::scoped_refptr<RtpSenderInterface>> PeerConnection::GetSenders()
1538 const {
deadbeefa601f5c2016-06-06 14:27:39 -07001539 std::vector<rtc::scoped_refptr<RtpSenderInterface>> ret;
Steve Anton4171afb2017-11-20 10:20:22 -08001540 for (auto sender : GetSendersInternal()) {
1541 ret.push_back(sender);
deadbeefa601f5c2016-06-06 14:27:39 -07001542 }
1543 return ret;
deadbeef70ab1a12015-09-28 16:53:55 -07001544}
1545
Steve Anton4171afb2017-11-20 10:20:22 -08001546std::vector<rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>>
1547PeerConnection::GetSendersInternal() const {
1548 std::vector<rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>>
1549 all_senders;
1550 for (auto transceiver : transceivers_) {
1551 auto senders = transceiver->internal()->senders();
1552 all_senders.insert(all_senders.end(), senders.begin(), senders.end());
1553 }
1554 return all_senders;
1555}
1556
deadbeef70ab1a12015-09-28 16:53:55 -07001557std::vector<rtc::scoped_refptr<RtpReceiverInterface>>
1558PeerConnection::GetReceivers() const {
deadbeefa601f5c2016-06-06 14:27:39 -07001559 std::vector<rtc::scoped_refptr<RtpReceiverInterface>> ret;
Steve Anton4171afb2017-11-20 10:20:22 -08001560 for (const auto& receiver : GetReceiversInternal()) {
1561 ret.push_back(receiver);
deadbeefa601f5c2016-06-06 14:27:39 -07001562 }
1563 return ret;
deadbeef70ab1a12015-09-28 16:53:55 -07001564}
1565
Steve Anton4171afb2017-11-20 10:20:22 -08001566std::vector<
1567 rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>>
1568PeerConnection::GetReceiversInternal() const {
1569 std::vector<
1570 rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>>
1571 all_receivers;
1572 for (auto transceiver : transceivers_) {
1573 auto receivers = transceiver->internal()->receivers();
1574 all_receivers.insert(all_receivers.end(), receivers.begin(),
1575 receivers.end());
1576 }
1577 return all_receivers;
1578}
1579
Steve Anton9158ef62017-11-27 13:01:52 -08001580std::vector<rtc::scoped_refptr<RtpTransceiverInterface>>
1581PeerConnection::GetTransceivers() const {
Steve Antonfc853712018-03-01 13:48:58 -08001582 RTC_CHECK(IsUnifiedPlan())
1583 << "GetTransceivers is only supported with Unified Plan SdpSemantics.";
Steve Anton9158ef62017-11-27 13:01:52 -08001584 std::vector<rtc::scoped_refptr<RtpTransceiverInterface>> all_transceivers;
1585 for (auto transceiver : transceivers_) {
1586 all_transceivers.push_back(transceiver);
1587 }
1588 return all_transceivers;
1589}
1590
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001591bool PeerConnection::GetStats(StatsObserver* observer,
wu@webrtc.orgb9a088b2014-02-13 23:18:49 +00001592 MediaStreamTrackInterface* track,
1593 StatsOutputLevel level) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001594 TRACE_EVENT0("webrtc", "PeerConnection::GetStats");
deadbeef0a6c4ca2015-10-06 11:38:28 -07001595 RTC_DCHECK(signaling_thread()->IsCurrent());
nisse7ce109a2017-01-31 00:57:56 -08001596 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001597 RTC_LOG(LS_ERROR) << "GetStats - observer is NULL.";
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001598 return false;
1599 }
1600
tommi@webrtc.org03505bc2014-07-14 20:15:26 +00001601 stats_->UpdateStats(level);
zhihuange9e94c32016-11-04 11:38:15 -07001602 // The StatsCollector is used to tell if a track is valid because it may
1603 // remember tracks that the PeerConnection previously removed.
1604 if (track && !stats_->IsValidTrack(track->id())) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001605 RTC_LOG(LS_WARNING) << "GetStats is called with an invalid track: "
1606 << track->id();
zhihuange9e94c32016-11-04 11:38:15 -07001607 return false;
1608 }
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -07001609 signaling_thread()->Post(RTC_FROM_HERE, this, MSG_GETSTATS,
tommi@webrtc.org5b06b062014-08-15 08:38:30 +00001610 new GetStatsMsg(observer, track));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001611 return true;
1612}
1613
hbos74e1a4f2016-09-15 23:33:01 -07001614void PeerConnection::GetStats(RTCStatsCollectorCallback* callback) {
Henrik Boström1df1bf82018-03-20 13:24:20 +01001615 TRACE_EVENT0("webrtc", "PeerConnection::GetStats");
hbos74e1a4f2016-09-15 23:33:01 -07001616 RTC_DCHECK(stats_collector_);
Henrik Boström1df1bf82018-03-20 13:24:20 +01001617 RTC_DCHECK(callback);
hbos74e1a4f2016-09-15 23:33:01 -07001618 stats_collector_->GetStatsReport(callback);
1619}
1620
Henrik Boström1df1bf82018-03-20 13:24:20 +01001621void PeerConnection::GetStats(
1622 rtc::scoped_refptr<RtpSenderInterface> selector,
1623 rtc::scoped_refptr<RTCStatsCollectorCallback> callback) {
1624 TRACE_EVENT0("webrtc", "PeerConnection::GetStats");
1625 RTC_DCHECK(callback);
1626 RTC_DCHECK(stats_collector_);
1627 rtc::scoped_refptr<RtpSenderInternal> internal_sender;
1628 if (selector) {
1629 for (const auto& proxy_transceiver : transceivers_) {
1630 for (const auto& proxy_sender :
1631 proxy_transceiver->internal()->senders()) {
1632 if (proxy_sender == selector) {
1633 internal_sender = proxy_sender->internal();
1634 break;
1635 }
1636 }
1637 if (internal_sender)
1638 break;
1639 }
1640 }
1641 // If there is no |internal_sender| then |selector| is either null or does not
1642 // belong to the PeerConnection (in Plan B, senders can be removed from the
1643 // PeerConnection). This means that "all the stats objects representing the
1644 // selector" is an empty set. Invoking GetStatsReport() with a null selector
1645 // produces an empty stats report.
1646 stats_collector_->GetStatsReport(internal_sender, callback);
1647}
1648
1649void PeerConnection::GetStats(
1650 rtc::scoped_refptr<RtpReceiverInterface> selector,
1651 rtc::scoped_refptr<RTCStatsCollectorCallback> callback) {
1652 TRACE_EVENT0("webrtc", "PeerConnection::GetStats");
1653 RTC_DCHECK(callback);
1654 RTC_DCHECK(stats_collector_);
1655 rtc::scoped_refptr<RtpReceiverInternal> internal_receiver;
1656 if (selector) {
1657 for (const auto& proxy_transceiver : transceivers_) {
1658 for (const auto& proxy_receiver :
1659 proxy_transceiver->internal()->receivers()) {
1660 if (proxy_receiver == selector) {
1661 internal_receiver = proxy_receiver->internal();
1662 break;
1663 }
1664 }
1665 if (internal_receiver)
1666 break;
1667 }
1668 }
1669 // If there is no |internal_receiver| then |selector| is either null or does
1670 // not belong to the PeerConnection (in Plan B, receivers can be removed from
1671 // the PeerConnection). This means that "all the stats objects representing
1672 // the selector" is an empty set. Invoking GetStatsReport() with a null
1673 // selector produces an empty stats report.
1674 stats_collector_->GetStatsReport(internal_receiver, callback);
1675}
1676
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001677PeerConnectionInterface::SignalingState PeerConnection::signaling_state() {
1678 return signaling_state_;
1679}
1680
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001681PeerConnectionInterface::IceConnectionState
1682PeerConnection::ice_connection_state() {
1683 return ice_connection_state_;
1684}
1685
1686PeerConnectionInterface::IceGatheringState
1687PeerConnection::ice_gathering_state() {
1688 return ice_gathering_state_;
1689}
1690
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00001691rtc::scoped_refptr<DataChannelInterface>
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001692PeerConnection::CreateDataChannel(
1693 const std::string& label,
1694 const DataChannelInit* config) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001695 TRACE_EVENT0("webrtc", "PeerConnection::CreateDataChannel");
zhihuang9763d562016-08-05 11:14:50 -07001696
deadbeefab9b2d12015-10-14 11:33:11 -07001697 bool first_datachannel = !HasDataChannels();
jiayl@webrtc.org001fd2d2014-05-29 15:31:11 +00001698
kwibergd1fe2812016-04-27 06:47:29 -07001699 std::unique_ptr<InternalDataChannelInit> internal_config;
henrika@webrtc.orgaebb1ad2014-01-14 10:00:58 +00001700 if (config) {
1701 internal_config.reset(new InternalDataChannelInit(*config));
1702 }
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00001703 rtc::scoped_refptr<DataChannelInterface> channel(
deadbeefab9b2d12015-10-14 11:33:11 -07001704 InternalCreateDataChannel(label, internal_config.get()));
1705 if (!channel.get()) {
1706 return nullptr;
1707 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001708
jiayl@webrtc.org001fd2d2014-05-29 15:31:11 +00001709 // Trigger the onRenegotiationNeeded event for every new RTP DataChannel, or
1710 // the first SCTP DataChannel.
Steve Anton75737c02017-11-06 10:37:17 -08001711 if (data_channel_type() == cricket::DCT_RTP || first_datachannel) {
jiayl@webrtc.org001fd2d2014-05-29 15:31:11 +00001712 observer_->OnRenegotiationNeeded();
1713 }
wu@webrtc.org91053e72013-08-10 07:18:04 +00001714
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001715 return DataChannelProxy::Create(signaling_thread(), channel.get());
1716}
1717
1718void PeerConnection::CreateOffer(CreateSessionDescriptionObserver* observer,
1719 const MediaConstraintsInterface* constraints) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001720 TRACE_EVENT0("webrtc", "PeerConnection::CreateOffer");
Steve Anton8d3444d2017-10-20 15:30:51 -07001721
zhihuang1c378ed2017-08-17 14:10:50 -07001722 PeerConnectionInterface::RTCOfferAnswerOptions offer_answer_options;
1723 // Always create an offer even if |ConvertConstraintsToOfferAnswerOptions|
1724 // returns false for now. Because |ConvertConstraintsToOfferAnswerOptions|
1725 // compares the mandatory fields parsed with the mandatory fields added in the
1726 // |constraints| and some downstream applications might create offers with
1727 // mandatory fields which would not be parsed in the helper method. For
1728 // example, in Chromium/remoting, |kEnableDtlsSrtp| is added to the
1729 // |constraints| as a mandatory field but it is not parsed.
1730 ConvertConstraintsToOfferAnswerOptions(constraints, &offer_answer_options);
jiayl@webrtc.orgb18bf5e2014-08-04 18:34:16 +00001731
zhihuang1c378ed2017-08-17 14:10:50 -07001732 CreateOffer(observer, offer_answer_options);
jiayl@webrtc.orgb18bf5e2014-08-04 18:34:16 +00001733}
1734
1735void PeerConnection::CreateOffer(CreateSessionDescriptionObserver* observer,
1736 const RTCOfferAnswerOptions& options) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001737 TRACE_EVENT0("webrtc", "PeerConnection::CreateOffer");
Steve Anton8d3444d2017-10-20 15:30:51 -07001738
nisse7ce109a2017-01-31 00:57:56 -08001739 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001740 RTC_LOG(LS_ERROR) << "CreateOffer - observer is NULL.";
jiayl@webrtc.orgb18bf5e2014-08-04 18:34:16 +00001741 return;
1742 }
deadbeefab9b2d12015-10-14 11:33:11 -07001743
Steve Anton8d3444d2017-10-20 15:30:51 -07001744 if (IsClosed()) {
1745 std::string error = "CreateOffer called when PeerConnection is closed.";
Mirko Bonadei675513b2017-11-09 11:09:25 +01001746 RTC_LOG(LS_ERROR) << error;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001747 PostCreateSessionDescriptionFailure(
1748 observer, RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error)));
Steve Anton8d3444d2017-10-20 15:30:51 -07001749 return;
1750 }
1751
zhihuang1c378ed2017-08-17 14:10:50 -07001752 if (!ValidateOfferAnswerOptions(options)) {
deadbeefab9b2d12015-10-14 11:33:11 -07001753 std::string error = "CreateOffer called with invalid options.";
Mirko Bonadei675513b2017-11-09 11:09:25 +01001754 RTC_LOG(LS_ERROR) << error;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001755 PostCreateSessionDescriptionFailure(
1756 observer, RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error)));
deadbeefab9b2d12015-10-14 11:33:11 -07001757 return;
1758 }
1759
Steve Anton22da89f2018-01-25 13:58:07 -08001760 // Legacy handling for offer_to_receive_audio and offer_to_receive_video.
1761 // Specified in WebRTC section 4.4.3.2 "Legacy configuration extensions".
1762 if (IsUnifiedPlan()) {
1763 RTCError error = HandleLegacyOfferOptions(options);
1764 if (!error.ok()) {
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001765 PostCreateSessionDescriptionFailure(observer, std::move(error));
Steve Anton22da89f2018-01-25 13:58:07 -08001766 return;
1767 }
1768 }
1769
zhihuang1c378ed2017-08-17 14:10:50 -07001770 cricket::MediaSessionOptions session_options;
1771 GetOptionsForOffer(options, &session_options);
Steve Antond25da372017-11-06 14:50:29 -08001772 webrtc_session_desc_factory_->CreateOffer(observer, options, session_options);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001773}
1774
Steve Anton22da89f2018-01-25 13:58:07 -08001775RTCError PeerConnection::HandleLegacyOfferOptions(
1776 const RTCOfferAnswerOptions& options) {
1777 RTC_DCHECK(IsUnifiedPlan());
1778
1779 if (options.offer_to_receive_audio == 0) {
1780 RemoveRecvDirectionFromReceivingTransceiversOfType(
1781 cricket::MEDIA_TYPE_AUDIO);
1782 } else if (options.offer_to_receive_audio == 1) {
1783 AddUpToOneReceivingTransceiverOfType(cricket::MEDIA_TYPE_AUDIO);
1784 } else if (options.offer_to_receive_audio > 1) {
1785 LOG_AND_RETURN_ERROR(RTCErrorType::UNSUPPORTED_PARAMETER,
1786 "offer_to_receive_audio > 1 is not supported.");
1787 }
1788
1789 if (options.offer_to_receive_video == 0) {
1790 RemoveRecvDirectionFromReceivingTransceiversOfType(
1791 cricket::MEDIA_TYPE_VIDEO);
1792 } else if (options.offer_to_receive_video == 1) {
1793 AddUpToOneReceivingTransceiverOfType(cricket::MEDIA_TYPE_VIDEO);
1794 } else if (options.offer_to_receive_video > 1) {
1795 LOG_AND_RETURN_ERROR(RTCErrorType::UNSUPPORTED_PARAMETER,
1796 "offer_to_receive_video > 1 is not supported.");
1797 }
1798
1799 return RTCError::OK();
1800}
1801
1802void PeerConnection::RemoveRecvDirectionFromReceivingTransceiversOfType(
1803 cricket::MediaType media_type) {
1804 for (auto transceiver : GetReceivingTransceiversOfType(media_type)) {
Steve Anton3d954a62018-04-02 11:27:23 -07001805 RtpTransceiverDirection new_direction =
1806 RtpTransceiverDirectionWithRecvSet(transceiver->direction(), false);
1807 if (new_direction != transceiver->direction()) {
1808 RTC_LOG(LS_INFO) << "Changing " << cricket::MediaTypeToString(media_type)
1809 << " transceiver (MID="
1810 << transceiver->mid().value_or("<not set>") << ") from "
1811 << RtpTransceiverDirectionToString(
1812 transceiver->direction())
1813 << " to "
1814 << RtpTransceiverDirectionToString(new_direction)
1815 << " since CreateOffer specified offer_to_receive=0";
1816 transceiver->internal()->set_direction(new_direction);
1817 }
Steve Anton22da89f2018-01-25 13:58:07 -08001818 }
1819}
1820
1821void PeerConnection::AddUpToOneReceivingTransceiverOfType(
1822 cricket::MediaType media_type) {
1823 if (GetReceivingTransceiversOfType(media_type).empty()) {
Steve Anton3d954a62018-04-02 11:27:23 -07001824 RTC_LOG(LS_INFO)
1825 << "Adding one recvonly " << cricket::MediaTypeToString(media_type)
1826 << " transceiver since CreateOffer specified offer_to_receive=1";
Steve Anton22da89f2018-01-25 13:58:07 -08001827 RtpTransceiverInit init;
1828 init.direction = RtpTransceiverDirection::kRecvOnly;
1829 AddTransceiver(media_type, nullptr, init, /*fire_callback=*/false);
1830 }
1831}
1832
1833std::vector<rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
1834PeerConnection::GetReceivingTransceiversOfType(cricket::MediaType media_type) {
1835 std::vector<
1836 rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
1837 receiving_transceivers;
1838 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -08001839 if (!transceiver->stopped() && transceiver->media_type() == media_type &&
Steve Anton22da89f2018-01-25 13:58:07 -08001840 RtpTransceiverDirectionHasRecv(transceiver->direction())) {
1841 receiving_transceivers.push_back(transceiver);
1842 }
1843 }
1844 return receiving_transceivers;
1845}
1846
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001847void PeerConnection::CreateAnswer(
1848 CreateSessionDescriptionObserver* observer,
1849 const MediaConstraintsInterface* constraints) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001850 TRACE_EVENT0("webrtc", "PeerConnection::CreateAnswer");
Steve Anton8d3444d2017-10-20 15:30:51 -07001851
nisse7ce109a2017-01-31 00:57:56 -08001852 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001853 RTC_LOG(LS_ERROR) << "CreateAnswer - observer is NULL.";
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001854 return;
1855 }
deadbeefab9b2d12015-10-14 11:33:11 -07001856
zhihuang1c378ed2017-08-17 14:10:50 -07001857 PeerConnectionInterface::RTCOfferAnswerOptions offer_answer_options;
1858 if (!ConvertConstraintsToOfferAnswerOptions(constraints,
1859 &offer_answer_options)) {
deadbeefab9b2d12015-10-14 11:33:11 -07001860 std::string error = "CreateAnswer called with invalid constraints.";
Mirko Bonadei675513b2017-11-09 11:09:25 +01001861 RTC_LOG(LS_ERROR) << error;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001862 PostCreateSessionDescriptionFailure(
1863 observer, RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error)));
deadbeefab9b2d12015-10-14 11:33:11 -07001864 return;
1865 }
1866
Steve Anton8d3444d2017-10-20 15:30:51 -07001867 CreateAnswer(observer, offer_answer_options);
htaa2a49d92016-03-04 02:51:39 -08001868}
1869
1870void PeerConnection::CreateAnswer(CreateSessionDescriptionObserver* observer,
1871 const RTCOfferAnswerOptions& options) {
1872 TRACE_EVENT0("webrtc", "PeerConnection::CreateAnswer");
nisse7ce109a2017-01-31 00:57:56 -08001873 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001874 RTC_LOG(LS_ERROR) << "CreateAnswer - observer is NULL.";
htaa2a49d92016-03-04 02:51:39 -08001875 return;
1876 }
1877
Steve Antondffead82018-02-06 10:31:29 -08001878 if (!(signaling_state_ == kHaveRemoteOffer ||
1879 signaling_state_ == kHaveLocalPrAnswer)) {
1880 std::string error =
1881 "PeerConnection cannot create an answer in a state other than "
1882 "have-remote-offer or have-local-pranswer.";
Mirko Bonadei675513b2017-11-09 11:09:25 +01001883 RTC_LOG(LS_ERROR) << error;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001884 PostCreateSessionDescriptionFailure(
1885 observer, RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error)));
Steve Anton8d3444d2017-10-20 15:30:51 -07001886 return;
1887 }
1888
Steve Antondffead82018-02-06 10:31:29 -08001889 // The remote description should be set if we're in the right state.
1890 RTC_DCHECK(remote_description());
Steve Anton8d3444d2017-10-20 15:30:51 -07001891
Steve Anton22da89f2018-01-25 13:58:07 -08001892 if (IsUnifiedPlan()) {
1893 if (options.offer_to_receive_audio != RTCOfferAnswerOptions::kUndefined) {
1894 RTC_LOG(LS_WARNING) << "CreateAnswer: offer_to_receive_audio is not "
1895 "supported with Unified Plan semantics. Use the "
1896 "RtpTransceiver API instead.";
1897 }
1898 if (options.offer_to_receive_video != RTCOfferAnswerOptions::kUndefined) {
1899 RTC_LOG(LS_WARNING) << "CreateAnswer: offer_to_receive_video is not "
1900 "supported with Unified Plan semantics. Use the "
1901 "RtpTransceiver API instead.";
1902 }
1903 }
1904
htaa2a49d92016-03-04 02:51:39 -08001905 cricket::MediaSessionOptions session_options;
zhihuang1c378ed2017-08-17 14:10:50 -07001906 GetOptionsForAnswer(options, &session_options);
htaa2a49d92016-03-04 02:51:39 -08001907
Steve Antond25da372017-11-06 14:50:29 -08001908 webrtc_session_desc_factory_->CreateAnswer(observer, session_options);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001909}
1910
1911void PeerConnection::SetLocalDescription(
1912 SetSessionDescriptionObserver* observer,
Steve Anton80dd7b52018-02-16 17:08:42 -08001913 SessionDescriptionInterface* desc_ptr) {
Peter Boström1a9d6152015-12-08 22:15:17 +01001914 TRACE_EVENT0("webrtc", "PeerConnection::SetLocalDescription");
Steve Anton8a006912017-12-04 15:25:56 -08001915
Steve Anton80dd7b52018-02-16 17:08:42 -08001916 // The SetLocalDescription contract is that we take ownership of the session
1917 // description regardless of the outcome, so wrap it in a unique_ptr right
1918 // away. Ideally, SetLocalDescription's signature will be changed to take the
1919 // description as a unique_ptr argument to formalize this agreement.
1920 std::unique_ptr<SessionDescriptionInterface> desc(desc_ptr);
1921
nisse7ce109a2017-01-31 00:57:56 -08001922 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01001923 RTC_LOG(LS_ERROR) << "SetLocalDescription - observer is NULL.";
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001924 return;
1925 }
Steve Anton8a006912017-12-04 15:25:56 -08001926
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001927 if (!desc) {
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001928 PostSetSessionDescriptionFailure(
1929 observer,
1930 RTCError(RTCErrorType::INTERNAL_ERROR, "SessionDescription is NULL."));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00001931 return;
1932 }
Steve Anton8d3444d2017-10-20 15:30:51 -07001933
Steve Anton80dd7b52018-02-16 17:08:42 -08001934 // If a session error has occurred the PeerConnection is in a possibly
1935 // inconsistent state so fail right away.
1936 if (session_error() != SessionError::kNone) {
1937 std::string error_message = GetSessionErrorMsg();
1938 RTC_LOG(LS_ERROR) << "SetLocalDescription: " << error_message;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001939 PostSetSessionDescriptionFailure(
1940 observer,
1941 RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error_message)));
Steve Anton80dd7b52018-02-16 17:08:42 -08001942 return;
1943 }
Steve Anton8d3444d2017-10-20 15:30:51 -07001944
Steve Anton80dd7b52018-02-16 17:08:42 -08001945 RTCError error = ValidateSessionDescription(desc.get(), cricket::CS_LOCAL);
1946 if (!error.ok()) {
1947 std::string error_message = GetSetDescriptionErrorMessage(
1948 cricket::CS_LOCAL, desc->GetType(), error);
1949 RTC_LOG(LS_ERROR) << error_message;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001950 PostSetSessionDescriptionFailure(
1951 observer,
1952 RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error_message)));
Steve Anton80dd7b52018-02-16 17:08:42 -08001953 return;
1954 }
1955
1956 // Grab the description type before moving ownership to ApplyLocalDescription,
1957 // which may destroy it before returning.
1958 const SdpType type = desc->GetType();
1959
1960 error = ApplyLocalDescription(std::move(desc));
Steve Anton8a006912017-12-04 15:25:56 -08001961 // |desc| may be destroyed at this point.
1962
1963 if (!error.ok()) {
Steve Anton80dd7b52018-02-16 17:08:42 -08001964 // If ApplyLocalDescription fails, the PeerConnection could be in an
1965 // inconsistent state, so act conservatively here and set the session error
1966 // so that future calls to SetLocalDescription/SetRemoteDescription fail.
1967 SetSessionError(SessionError::kContent, error.message());
1968 std::string error_message =
1969 GetSetDescriptionErrorMessage(cricket::CS_LOCAL, type, error);
1970 RTC_LOG(LS_ERROR) << error_message;
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01001971 PostSetSessionDescriptionFailure(
1972 observer,
1973 RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error_message)));
Steve Anton8d3444d2017-10-20 15:30:51 -07001974 return;
1975 }
Steve Anton8a006912017-12-04 15:25:56 -08001976 RTC_DCHECK(local_description());
1977
1978 PostSetSessionDescriptionSuccess(observer);
1979
Steve Anton8a006912017-12-04 15:25:56 -08001980 // MaybeStartGathering needs to be called after posting
1981 // MSG_SET_SESSIONDESCRIPTION_SUCCESS, so that we don't signal any candidates
1982 // before signaling that SetLocalDescription completed.
1983 transport_controller_->MaybeStartGathering();
1984
Steve Antona3a92c22017-12-07 10:27:41 -08001985 if (local_description()->GetType() == SdpType::kAnswer) {
Steve Anton8a006912017-12-04 15:25:56 -08001986 // TODO(deadbeef): We already had to hop to the network thread for
1987 // MaybeStartGathering...
1988 network_thread()->Invoke<void>(
1989 RTC_FROM_HERE, rtc::Bind(&cricket::PortAllocator::DiscardCandidatePool,
1990 port_allocator_.get()));
Steve Anton0ffaaa22018-02-23 10:31:30 -08001991 // Make UMA notes about what was agreed to.
1992 ReportNegotiatedSdpSemantics(*local_description());
Steve Anton8a006912017-12-04 15:25:56 -08001993 }
1994}
1995
1996RTCError PeerConnection::ApplyLocalDescription(
1997 std::unique_ptr<SessionDescriptionInterface> desc) {
1998 RTC_DCHECK_RUN_ON(signaling_thread());
1999 RTC_DCHECK(desc);
2000
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002001 // Update stats here so that we have the most recent stats for tracks and
2002 // streams that might be removed by updating the session description.
tommi@webrtc.org03505bc2014-07-14 20:15:26 +00002003 stats_->UpdateStats(kStatsOutputLevelStandard);
Steve Anton8a006912017-12-04 15:25:56 -08002004
Steve Antondcc3c022017-12-22 16:02:54 -08002005 // Take a reference to the old local description since it's used below to
2006 // compare against the new local description. When setting the new local
2007 // description, grab ownership of the replaced session description in case it
2008 // is the same as |old_local_description|, to keep it alive for the duration
2009 // of the method.
2010 const SessionDescriptionInterface* old_local_description =
2011 local_description();
2012 std::unique_ptr<SessionDescriptionInterface> replaced_local_description;
Zhi Huange830e682018-03-30 10:48:35 -07002013 SdpType type = desc->GetType();
Steve Anton3828c062017-12-06 10:34:51 -08002014 if (type == SdpType::kAnswer) {
Steve Antondcc3c022017-12-22 16:02:54 -08002015 replaced_local_description = pending_local_description_
2016 ? std::move(pending_local_description_)
2017 : std::move(current_local_description_);
Steve Anton8a006912017-12-04 15:25:56 -08002018 current_local_description_ = std::move(desc);
2019 pending_local_description_ = nullptr;
2020 current_remote_description_ = std::move(pending_remote_description_);
2021 } else {
Steve Antondcc3c022017-12-22 16:02:54 -08002022 replaced_local_description = std::move(pending_local_description_);
Steve Anton8a006912017-12-04 15:25:56 -08002023 pending_local_description_ = std::move(desc);
2024 }
2025 // The session description to apply now must be accessed by
2026 // |local_description()|.
Henrik Boströmfdb92012017-11-09 19:55:44 +01002027 RTC_DCHECK(local_description());
deadbeefab9b2d12015-10-14 11:33:11 -07002028
Zhi Huange830e682018-03-30 10:48:35 -07002029 RTCError error = PushdownTransportDescription(cricket::CS_LOCAL, type);
2030 if (!error.ok()) {
2031 return error;
2032 }
2033
Steve Antondcc3c022017-12-22 16:02:54 -08002034 if (IsUnifiedPlan()) {
2035 RTCError error = UpdateTransceiversAndDataChannels(
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002036 cricket::CS_LOCAL, *local_description(), old_local_description,
2037 remote_description());
Steve Anton8a006912017-12-04 15:25:56 -08002038 if (!error.ok()) {
2039 return error;
2040 }
Steve Antondcc3c022017-12-22 16:02:54 -08002041 for (auto transceiver : transceivers_) {
2042 const ContentInfo* content =
2043 FindMediaSectionForTransceiver(transceiver, local_description());
2044 if (!content) {
2045 continue;
2046 }
2047 const MediaContentDescription* media_desc = content->media_description();
2048 if (type == SdpType::kPrAnswer || type == SdpType::kAnswer) {
2049 transceiver->internal()->set_current_direction(media_desc->direction());
2050 }
2051 if (content->rejected && !transceiver->stopped()) {
Steve Anton3d954a62018-04-02 11:27:23 -07002052 RTC_LOG(LS_INFO) << "Stopping transceiver for MID=" << content->name
2053 << " since the media section was rejected.";
Steve Antondcc3c022017-12-22 16:02:54 -08002054 transceiver->Stop();
2055 }
2056 }
2057 } else {
Zhi Huange830e682018-03-30 10:48:35 -07002058 // Media channels will be created only when offer is set. These may use new
2059 // transports just created by PushdownTransportDescription.
Steve Antondcc3c022017-12-22 16:02:54 -08002060 if (type == SdpType::kOffer) {
2061 // TODO(bugs.webrtc.org/4676) - Handle CreateChannel failure, as new local
2062 // description is applied. Restore back to old description.
2063 RTCError error = CreateChannels(*local_description()->description());
2064 if (!error.ok()) {
2065 return error;
2066 }
2067 }
Steve Antondcc3c022017-12-22 16:02:54 -08002068 // Remove unused channels if MediaContentDescription is rejected.
2069 RemoveUnusedChannels(local_description()->description());
2070 }
Steve Anton8a006912017-12-04 15:25:56 -08002071
Zhi Huange830e682018-03-30 10:48:35 -07002072 error = UpdateSessionState(type, cricket::CS_LOCAL,
2073 local_description()->description());
Steve Anton8a006912017-12-04 15:25:56 -08002074 if (!error.ok()) {
2075 return error;
2076 }
Steve Antondcc3c022017-12-22 16:02:54 -08002077
Steve Anton8a006912017-12-04 15:25:56 -08002078 if (remote_description()) {
2079 // Now that we have a local description, we can push down remote candidates.
2080 UseCandidatesInSessionDescription(remote_description());
2081 }
2082
2083 pending_ice_restarts_.clear();
2084 if (session_error() != SessionError::kNone) {
2085 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR, GetSessionErrorMsg());
2086 }
2087
deadbeefab9b2d12015-10-14 11:33:11 -07002088 // If setting the description decided our SSL role, allocate any necessary
2089 // SCTP sids.
2090 rtc::SSLRole role;
Steve Anton75737c02017-11-06 10:37:17 -08002091 if (data_channel_type() == cricket::DCT_SCTP && GetSctpSslRole(&role)) {
deadbeefab9b2d12015-10-14 11:33:11 -07002092 AllocateSctpSids(role);
2093 }
2094
Steve Antond3679212018-01-17 17:41:02 -08002095 if (IsUnifiedPlan()) {
2096 for (auto transceiver : transceivers_) {
2097 const ContentInfo* content =
2098 FindMediaSectionForTransceiver(transceiver, local_description());
2099 if (!content) {
2100 continue;
2101 }
Steve Anton74255ff2018-01-24 18:32:57 -08002102 const auto& streams = content->media_description()->streams();
2103 if (!content->rejected && !streams.empty()) {
Steve Antond3679212018-01-17 17:41:02 -08002104 transceiver->internal()->sender_internal()->set_stream_ids(
Seth Hampson845e8782018-03-02 11:34:10 -08002105 streams[0].stream_ids());
Steve Antond3679212018-01-17 17:41:02 -08002106 transceiver->internal()->sender_internal()->SetSsrc(
Steve Anton74255ff2018-01-24 18:32:57 -08002107 streams[0].first_ssrc());
Steve Antond3679212018-01-17 17:41:02 -08002108 }
2109 }
2110 } else {
2111 // Plan B semantics.
2112
Steve Antondcc3c022017-12-22 16:02:54 -08002113 // Update state and SSRC of local MediaStreams and DataChannels based on the
2114 // local session description.
2115 const cricket::ContentInfo* audio_content =
2116 GetFirstAudioContent(local_description()->description());
2117 if (audio_content) {
2118 if (audio_content->rejected) {
2119 RemoveSenders(cricket::MEDIA_TYPE_AUDIO);
2120 } else {
2121 const cricket::AudioContentDescription* audio_desc =
2122 audio_content->media_description()->as_audio();
2123 UpdateLocalSenders(audio_desc->streams(), audio_desc->type());
2124 }
deadbeeffaac4972015-11-12 15:33:07 -08002125 }
deadbeefab9b2d12015-10-14 11:33:11 -07002126
Steve Antondcc3c022017-12-22 16:02:54 -08002127 const cricket::ContentInfo* video_content =
2128 GetFirstVideoContent(local_description()->description());
2129 if (video_content) {
2130 if (video_content->rejected) {
2131 RemoveSenders(cricket::MEDIA_TYPE_VIDEO);
2132 } else {
2133 const cricket::VideoContentDescription* video_desc =
2134 video_content->media_description()->as_video();
2135 UpdateLocalSenders(video_desc->streams(), video_desc->type());
2136 }
deadbeeffaac4972015-11-12 15:33:07 -08002137 }
deadbeefab9b2d12015-10-14 11:33:11 -07002138 }
2139
2140 const cricket::ContentInfo* data_content =
Henrik Boströmfdb92012017-11-09 19:55:44 +01002141 GetFirstDataContent(local_description()->description());
deadbeefab9b2d12015-10-14 11:33:11 -07002142 if (data_content) {
2143 const cricket::DataContentDescription* data_desc =
Steve Antonb1c1de12017-12-21 15:14:30 -08002144 data_content->media_description()->as_data();
deadbeefab9b2d12015-10-14 11:33:11 -07002145 if (rtc::starts_with(data_desc->protocol().data(),
2146 cricket::kMediaProtocolRtpPrefix)) {
2147 UpdateLocalRtpDataChannels(data_desc->streams());
2148 }
2149 }
2150
Steve Anton8a006912017-12-04 15:25:56 -08002151 return RTCError::OK();
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002152}
2153
2154void PeerConnection::SetRemoteDescription(
Henrik Boströma4ecf552017-11-23 14:17:07 +00002155 SetSessionDescriptionObserver* observer,
2156 SessionDescriptionInterface* desc) {
Henrik Boström31638672017-11-23 17:48:32 +01002157 SetRemoteDescription(
2158 std::unique_ptr<SessionDescriptionInterface>(desc),
2159 rtc::scoped_refptr<SetRemoteDescriptionObserverInterface>(
2160 new SetRemoteDescriptionObserverAdapter(this, observer)));
2161}
2162
2163void PeerConnection::SetRemoteDescription(
2164 std::unique_ptr<SessionDescriptionInterface> desc,
2165 rtc::scoped_refptr<SetRemoteDescriptionObserverInterface> observer) {
Peter Boström1a9d6152015-12-08 22:15:17 +01002166 TRACE_EVENT0("webrtc", "PeerConnection::SetRemoteDescription");
Steve Anton8a006912017-12-04 15:25:56 -08002167
nisse7ce109a2017-01-31 00:57:56 -08002168 if (!observer) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002169 RTC_LOG(LS_ERROR) << "SetRemoteDescription - observer is NULL.";
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002170 return;
2171 }
Steve Anton8a006912017-12-04 15:25:56 -08002172
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002173 if (!desc) {
Henrik Boström31638672017-11-23 17:48:32 +01002174 observer->OnSetRemoteDescriptionComplete(RTCError(
Steve Anton8a006912017-12-04 15:25:56 -08002175 RTCErrorType::INVALID_PARAMETER, "SessionDescription is NULL."));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002176 return;
2177 }
Steve Anton8d3444d2017-10-20 15:30:51 -07002178
Steve Anton80dd7b52018-02-16 17:08:42 -08002179 // If a session error has occurred the PeerConnection is in a possibly
2180 // inconsistent state so fail right away.
2181 if (session_error() != SessionError::kNone) {
2182 std::string error_message = GetSessionErrorMsg();
2183 RTC_LOG(LS_ERROR) << "SetRemoteDescription: " << error_message;
2184 observer->OnSetRemoteDescriptionComplete(
2185 RTCError(RTCErrorType::INTERNAL_ERROR, std::move(error_message)));
2186 return;
2187 }
Steve Anton71439a62018-02-15 11:53:06 -08002188
Steve Antonba42e992018-04-09 14:10:01 -07002189 if (desc->GetType() == SdpType::kOffer) {
2190 // Report to UMA the format of the received offer.
2191 ReportSdpFormatReceived(*desc);
2192 }
2193
Steve Anton80dd7b52018-02-16 17:08:42 -08002194 RTCError error = ValidateSessionDescription(desc.get(), cricket::CS_REMOTE);
Steve Anton71439a62018-02-15 11:53:06 -08002195 if (!error.ok()) {
Steve Anton80dd7b52018-02-16 17:08:42 -08002196 std::string error_message = GetSetDescriptionErrorMessage(
2197 cricket::CS_REMOTE, desc->GetType(), error);
2198 RTC_LOG(LS_ERROR) << error_message;
Steve Anton71439a62018-02-15 11:53:06 -08002199 observer->OnSetRemoteDescriptionComplete(
2200 RTCError(error.type(), std::move(error_message)));
2201 return;
2202 }
Steve Anton71439a62018-02-15 11:53:06 -08002203
Steve Anton80dd7b52018-02-16 17:08:42 -08002204 // Grab the description type before moving ownership to
2205 // ApplyRemoteDescription, which may destroy it before returning.
2206 const SdpType type = desc->GetType();
2207
2208 error = ApplyRemoteDescription(std::move(desc));
2209 // |desc| may be destroyed at this point.
2210
2211 if (!error.ok()) {
2212 // If ApplyRemoteDescription fails, the PeerConnection could be in an
2213 // inconsistent state, so act conservatively here and set the session error
2214 // so that future calls to SetLocalDescription/SetRemoteDescription fail.
2215 SetSessionError(SessionError::kContent, error.message());
2216 std::string error_message =
2217 GetSetDescriptionErrorMessage(cricket::CS_REMOTE, type, error);
2218 RTC_LOG(LS_ERROR) << error_message;
2219 observer->OnSetRemoteDescriptionComplete(
2220 RTCError(error.type(), std::move(error_message)));
2221 return;
2222 }
2223 RTC_DCHECK(remote_description());
2224
2225 if (type == SdpType::kAnswer) {
Steve Anton8a006912017-12-04 15:25:56 -08002226 // TODO(deadbeef): We already had to hop to the network thread for
2227 // MaybeStartGathering...
2228 network_thread()->Invoke<void>(
2229 RTC_FROM_HERE, rtc::Bind(&cricket::PortAllocator::DiscardCandidatePool,
2230 port_allocator_.get()));
Harald Alvestrand5dbb5862018-02-13 23:48:00 +01002231 // Make UMA notes about what was agreed to.
Steve Anton0ffaaa22018-02-23 10:31:30 -08002232 ReportNegotiatedSdpSemantics(*remote_description());
Steve Anton8a006912017-12-04 15:25:56 -08002233 }
2234
2235 observer->OnSetRemoteDescriptionComplete(RTCError::OK());
2236}
2237
2238RTCError PeerConnection::ApplyRemoteDescription(
2239 std::unique_ptr<SessionDescriptionInterface> desc) {
2240 RTC_DCHECK_RUN_ON(signaling_thread());
2241 RTC_DCHECK(desc);
2242
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002243 // Update stats here so that we have the most recent stats for tracks and
2244 // streams that might be removed by updating the session description.
tommi@webrtc.org03505bc2014-07-14 20:15:26 +00002245 stats_->UpdateStats(kStatsOutputLevelStandard);
Steve Anton8a006912017-12-04 15:25:56 -08002246
Steve Antondcc3c022017-12-22 16:02:54 -08002247 // Take a reference to the old remote description since it's used below to
2248 // compare against the new remote description. When setting the new remote
2249 // description, grab ownership of the replaced session description in case it
2250 // is the same as |old_remote_description|, to keep it alive for the duration
2251 // of the method.
Steve Anton8a006912017-12-04 15:25:56 -08002252 const SessionDescriptionInterface* old_remote_description =
2253 remote_description();
Steve Anton8a006912017-12-04 15:25:56 -08002254 std::unique_ptr<SessionDescriptionInterface> replaced_remote_description;
Steve Anton3828c062017-12-06 10:34:51 -08002255 SdpType type = desc->GetType();
2256 if (type == SdpType::kAnswer) {
Steve Anton8a006912017-12-04 15:25:56 -08002257 replaced_remote_description = pending_remote_description_
2258 ? std::move(pending_remote_description_)
2259 : std::move(current_remote_description_);
2260 current_remote_description_ = std::move(desc);
2261 pending_remote_description_ = nullptr;
2262 current_local_description_ = std::move(pending_local_description_);
2263 } else {
2264 replaced_remote_description = std::move(pending_remote_description_);
2265 pending_remote_description_ = std::move(desc);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002266 }
Steve Anton8a006912017-12-04 15:25:56 -08002267 // The session description to apply now must be accessed by
2268 // |remote_description()|.
Henrik Boströmfdb92012017-11-09 19:55:44 +01002269 RTC_DCHECK(remote_description());
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002270
Zhi Huange830e682018-03-30 10:48:35 -07002271 RTCError error = PushdownTransportDescription(cricket::CS_REMOTE, type);
2272 if (!error.ok()) {
2273 return error;
2274 }
Steve Anton8a006912017-12-04 15:25:56 -08002275 // Transport and Media channels will be created only when offer is set.
Steve Antondcc3c022017-12-22 16:02:54 -08002276 if (IsUnifiedPlan()) {
2277 RTCError error = UpdateTransceiversAndDataChannels(
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002278 cricket::CS_REMOTE, *remote_description(), local_description(),
2279 old_remote_description);
Steve Anton8a006912017-12-04 15:25:56 -08002280 if (!error.ok()) {
2281 return error;
2282 }
Steve Antondcc3c022017-12-22 16:02:54 -08002283 } else {
Zhi Huange830e682018-03-30 10:48:35 -07002284 // Media channels will be created only when offer is set. These may use new
2285 // transports just created by PushdownTransportDescription.
Steve Antondcc3c022017-12-22 16:02:54 -08002286 if (type == SdpType::kOffer) {
Zhi Huange830e682018-03-30 10:48:35 -07002287 // TODO(mallinath) - Handle CreateChannel failure, as new local
Steve Antondcc3c022017-12-22 16:02:54 -08002288 // description is applied. Restore back to old description.
2289 RTCError error = CreateChannels(*remote_description()->description());
2290 if (!error.ok()) {
2291 return error;
2292 }
2293 }
Steve Antondcc3c022017-12-22 16:02:54 -08002294 // Remove unused channels if MediaContentDescription is rejected.
2295 RemoveUnusedChannels(remote_description()->description());
2296 }
Steve Anton8a006912017-12-04 15:25:56 -08002297
Zhi Huange830e682018-03-30 10:48:35 -07002298 // NOTE: Candidates allocation will be initiated only when
2299 // SetLocalDescription is called.
2300 error = UpdateSessionState(type, cricket::CS_REMOTE,
2301 remote_description()->description());
Steve Anton8a006912017-12-04 15:25:56 -08002302 if (!error.ok()) {
2303 return error;
2304 }
2305
2306 if (local_description() &&
2307 !UseCandidatesInSessionDescription(remote_description())) {
2308 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, kInvalidCandidates);
2309 }
2310
2311 if (old_remote_description) {
2312 for (const cricket::ContentInfo& content :
2313 old_remote_description->description()->contents()) {
2314 // Check if this new SessionDescription contains new ICE ufrag and
2315 // password that indicates the remote peer requests an ICE restart.
2316 // TODO(deadbeef): When we start storing both the current and pending
2317 // remote description, this should reset pending_ice_restarts and compare
2318 // against the current description.
2319 if (CheckForRemoteIceRestart(old_remote_description, remote_description(),
2320 content.name)) {
Steve Anton3828c062017-12-06 10:34:51 -08002321 if (type == SdpType::kOffer) {
Steve Anton8a006912017-12-04 15:25:56 -08002322 pending_ice_restarts_.insert(content.name);
2323 }
2324 } else {
2325 // We retain all received candidates only if ICE is not restarted.
2326 // When ICE is restarted, all previous candidates belong to an old
2327 // generation and should not be kept.
2328 // TODO(deadbeef): This goes against the W3C spec which says the remote
2329 // description should only contain candidates from the last set remote
2330 // description plus any candidates added since then. We should remove
2331 // this once we're sure it won't break anything.
2332 WebRtcSessionDescriptionFactory::CopyCandidatesFromSessionDescription(
2333 old_remote_description, content.name, mutable_remote_description());
2334 }
2335 }
2336 }
2337
2338 if (session_error() != SessionError::kNone) {
2339 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR, GetSessionErrorMsg());
2340 }
2341
2342 // Set the the ICE connection state to connecting since the connection may
2343 // become writable with peer reflexive candidates before any remote candidate
2344 // is signaled.
2345 // TODO(pthatcher): This is a short-term solution for crbug/446908. A real fix
2346 // is to have a new signal the indicates a change in checking state from the
2347 // transport and expose a new checking() member from transport that can be
2348 // read to determine the current checking state. The existing SignalConnecting
2349 // actually means "gathering candidates", so cannot be be used here.
Steve Antona3a92c22017-12-07 10:27:41 -08002350 if (remote_description()->GetType() != SdpType::kOffer &&
Steve Anton8a006912017-12-04 15:25:56 -08002351 ice_connection_state() == PeerConnectionInterface::kIceConnectionNew) {
2352 SetIceConnectionState(PeerConnectionInterface::kIceConnectionChecking);
2353 }
2354
deadbeefab9b2d12015-10-14 11:33:11 -07002355 // If setting the description decided our SSL role, allocate any necessary
2356 // SCTP sids.
2357 rtc::SSLRole role;
Steve Anton75737c02017-11-06 10:37:17 -08002358 if (data_channel_type() == cricket::DCT_SCTP && GetSctpSslRole(&role)) {
deadbeefab9b2d12015-10-14 11:33:11 -07002359 AllocateSctpSids(role);
2360 }
2361
Steve Antondcc3c022017-12-22 16:02:54 -08002362 if (IsUnifiedPlan()) {
Steve Anton8b815cd2018-02-16 16:14:42 -08002363 std::vector<rtc::scoped_refptr<RtpTransceiverInterface>>
2364 receiving_transceivers;
Steve Antonc49bcd92018-02-14 14:28:13 -08002365 std::vector<rtc::scoped_refptr<MediaStreamInterface>> added_streams;
Steve Antondcc3c022017-12-22 16:02:54 -08002366 for (auto transceiver : transceivers_) {
2367 const ContentInfo* content =
2368 FindMediaSectionForTransceiver(transceiver, remote_description());
2369 if (!content) {
2370 continue;
2371 }
2372 const MediaContentDescription* media_desc = content->media_description();
2373 RtpTransceiverDirection local_direction =
2374 RtpTransceiverDirectionReversed(media_desc->direction());
2375 // From the WebRTC specification, steps 2.2.8.5/6 of section 4.4.1.6 "Set
2376 // the RTCSessionDescription: If direction is sendrecv or recvonly, and
2377 // transceiver's current direction is neither sendrecv nor recvonly,
2378 // process the addition of a remote track for the media description.
Seth Hampson5b4f0752018-04-02 16:31:36 -07002379 std::vector<std::string> stream_ids;
Seth Hampson2f0d7022018-02-20 11:54:42 -08002380 if (!media_desc->streams().empty()) {
Seth Hampson5897a6e2018-04-03 11:16:33 -07002381 // The remote description has signaled the stream IDs.
2382 stream_ids = media_desc->streams()[0].stream_ids();
Seth Hampson2f0d7022018-02-20 11:54:42 -08002383 }
Steve Antondcc3c022017-12-22 16:02:54 -08002384 if (RtpTransceiverDirectionHasRecv(local_direction) &&
2385 (!transceiver->current_direction() ||
2386 !RtpTransceiverDirectionHasRecv(
Seth Hampson2f0d7022018-02-20 11:54:42 -08002387 *transceiver->current_direction()))) {
Steve Anton3d954a62018-04-02 11:27:23 -07002388 RTC_LOG(LS_INFO) << "Processing the addition of a new track for MID="
Seth Hampson5b4f0752018-04-02 16:31:36 -07002389 << content->name << " (added to "
2390 << GetStreamIdsString(stream_ids) << ").";
2391
2392 std::vector<rtc::scoped_refptr<MediaStreamInterface>> media_streams;
2393 for (const std::string& stream_id : stream_ids) {
2394 rtc::scoped_refptr<MediaStreamInterface> stream =
2395 remote_streams_->find(stream_id);
2396 if (!stream) {
2397 stream = MediaStreamProxy::Create(rtc::Thread::Current(),
2398 MediaStream::Create(stream_id));
2399 remote_streams_->AddStream(stream);
2400 added_streams.push_back(stream);
2401 }
2402 media_streams.push_back(stream);
Steve Antonef65ef12018-01-10 17:15:20 -08002403 }
Seth Hampson5b4f0752018-04-02 16:31:36 -07002404 transceiver->internal()->receiver_internal()->SetStreams(media_streams);
Steve Anton8b815cd2018-02-16 16:14:42 -08002405 receiving_transceivers.push_back(transceiver);
Steve Antondcc3c022017-12-22 16:02:54 -08002406 }
2407 // If direction is sendonly or inactive, and transceiver's current
2408 // direction is neither sendonly nor inactive, process the removal of a
2409 // remote track for the media description.
2410 if (!RtpTransceiverDirectionHasRecv(local_direction) &&
Steve Antonef65ef12018-01-10 17:15:20 -08002411 (transceiver->current_direction() &&
Steve Antondcc3c022017-12-22 16:02:54 -08002412 RtpTransceiverDirectionHasRecv(*transceiver->current_direction()))) {
Steve Anton3d954a62018-04-02 11:27:23 -07002413 RTC_LOG(LS_INFO) << "Processing the removal of a track for MID="
2414 << content->name;
Steve Antonef65ef12018-01-10 17:15:20 -08002415 transceiver->internal()->receiver_internal()->SetStreams({});
Steve Antondcc3c022017-12-22 16:02:54 -08002416 }
2417 if (type == SdpType::kPrAnswer || type == SdpType::kAnswer) {
2418 transceiver->internal()->set_current_direction(local_direction);
2419 }
2420 if (content->rejected && !transceiver->stopped()) {
Steve Anton3d954a62018-04-02 11:27:23 -07002421 RTC_LOG(LS_INFO) << "Stopping transceiver for MID=" << content->name
2422 << " since the media section was rejected.";
Steve Antondcc3c022017-12-22 16:02:54 -08002423 transceiver->Stop();
2424 }
Seth Hampson2f0d7022018-02-20 11:54:42 -08002425 if (!content->rejected &&
2426 RtpTransceiverDirectionHasRecv(local_direction)) {
2427 // Set ssrc to 0 in the case of an unsignalled ssrc.
2428 uint32_t ssrc = 0;
Seth Hampson5897a6e2018-04-03 11:16:33 -07002429 if (!media_desc->streams().empty() &&
2430 media_desc->streams()[0].has_ssrcs()) {
Seth Hampson2f0d7022018-02-20 11:54:42 -08002431 ssrc = media_desc->streams()[0].first_ssrc();
2432 }
2433 transceiver->internal()->receiver_internal()->SetupMediaChannel(ssrc);
Steve Antond3679212018-01-17 17:41:02 -08002434 }
Steve Antondcc3c022017-12-22 16:02:54 -08002435 }
Steve Antonc49bcd92018-02-14 14:28:13 -08002436 // Once all processing has finished, fire off callbacks.
Steve Anton8b815cd2018-02-16 16:14:42 -08002437 for (auto transceiver : receiving_transceivers) {
Steve Anton6e221372018-02-20 12:59:16 -08002438 stats_->AddTrack(transceiver->receiver()->track());
Steve Anton8b815cd2018-02-16 16:14:42 -08002439 observer_->OnTrack(transceiver);
2440 observer_->OnAddTrack(transceiver->receiver(),
2441 transceiver->receiver()->streams());
Steve Antonef65ef12018-01-10 17:15:20 -08002442 }
Steve Antonc49bcd92018-02-14 14:28:13 -08002443 for (auto stream : added_streams) {
2444 observer_->OnAddStream(stream);
2445 }
Steve Antondcc3c022017-12-22 16:02:54 -08002446 }
2447
Henrik Boströmfdb92012017-11-09 19:55:44 +01002448 const cricket::ContentInfo* audio_content =
2449 GetFirstAudioContent(remote_description()->description());
2450 const cricket::ContentInfo* video_content =
2451 GetFirstVideoContent(remote_description()->description());
deadbeefbda7e0b2015-12-08 17:13:40 -08002452 const cricket::AudioContentDescription* audio_desc =
Henrik Boströmfdb92012017-11-09 19:55:44 +01002453 GetFirstAudioContentDescription(remote_description()->description());
deadbeefbda7e0b2015-12-08 17:13:40 -08002454 const cricket::VideoContentDescription* video_desc =
Henrik Boströmfdb92012017-11-09 19:55:44 +01002455 GetFirstVideoContentDescription(remote_description()->description());
deadbeefbda7e0b2015-12-08 17:13:40 -08002456 const cricket::DataContentDescription* data_desc =
Henrik Boströmfdb92012017-11-09 19:55:44 +01002457 GetFirstDataContentDescription(remote_description()->description());
deadbeefbda7e0b2015-12-08 17:13:40 -08002458
2459 // Check if the descriptions include streams, just in case the peer supports
2460 // MSID, but doesn't indicate so with "a=msid-semantic".
Henrik Boströmfdb92012017-11-09 19:55:44 +01002461 if (remote_description()->description()->msid_supported() ||
deadbeefbda7e0b2015-12-08 17:13:40 -08002462 (audio_desc && !audio_desc->streams().empty()) ||
2463 (video_desc && !video_desc->streams().empty())) {
2464 remote_peer_supports_msid_ = true;
2465 }
deadbeefab9b2d12015-10-14 11:33:11 -07002466
2467 // We wait to signal new streams until we finish processing the description,
2468 // since only at that point will new streams have all their tracks.
2469 rtc::scoped_refptr<StreamCollection> new_streams(StreamCollection::Create());
2470
Steve Antondcc3c022017-12-22 16:02:54 -08002471 if (!IsUnifiedPlan()) {
2472 // TODO(steveanton): When removing RTP senders/receivers in response to a
2473 // rejected media section, there is some cleanup logic that expects the
2474 // voice/ video channel to still be set. But in this method the voice/video
2475 // channel would have been destroyed by the SetRemoteDescription caller
2476 // above so the cleanup that relies on them fails to run. The RemoveSenders
2477 // calls should be moved to right before the DestroyChannel calls to fix
2478 // this.
Steve Anton8d3444d2017-10-20 15:30:51 -07002479
Steve Antondcc3c022017-12-22 16:02:54 -08002480 // Find all audio rtp streams and create corresponding remote AudioTracks
2481 // and MediaStreams.
2482 if (audio_content) {
2483 if (audio_content->rejected) {
2484 RemoveSenders(cricket::MEDIA_TYPE_AUDIO);
2485 } else {
2486 bool default_audio_track_needed =
2487 !remote_peer_supports_msid_ &&
2488 RtpTransceiverDirectionHasSend(audio_desc->direction());
2489 UpdateRemoteSendersList(GetActiveStreams(audio_desc),
2490 default_audio_track_needed, audio_desc->type(),
2491 new_streams);
2492 }
deadbeeffaac4972015-11-12 15:33:07 -08002493 }
deadbeefab9b2d12015-10-14 11:33:11 -07002494
Steve Antondcc3c022017-12-22 16:02:54 -08002495 // Find all video rtp streams and create corresponding remote VideoTracks
2496 // and MediaStreams.
2497 if (video_content) {
2498 if (video_content->rejected) {
2499 RemoveSenders(cricket::MEDIA_TYPE_VIDEO);
2500 } else {
2501 bool default_video_track_needed =
2502 !remote_peer_supports_msid_ &&
2503 RtpTransceiverDirectionHasSend(video_desc->direction());
2504 UpdateRemoteSendersList(GetActiveStreams(video_desc),
2505 default_video_track_needed, video_desc->type(),
2506 new_streams);
2507 }
deadbeeffaac4972015-11-12 15:33:07 -08002508 }
deadbeefab9b2d12015-10-14 11:33:11 -07002509
Steve Antondcc3c022017-12-22 16:02:54 -08002510 // Update the DataChannels with the information from the remote peer.
2511 if (data_desc) {
2512 if (rtc::starts_with(data_desc->protocol().data(),
2513 cricket::kMediaProtocolRtpPrefix)) {
2514 UpdateRemoteRtpDataChannels(GetActiveStreams(data_desc));
2515 }
deadbeefab9b2d12015-10-14 11:33:11 -07002516 }
deadbeefab9b2d12015-10-14 11:33:11 -07002517
Steve Antondcc3c022017-12-22 16:02:54 -08002518 // Iterate new_streams and notify the observer about new MediaStreams.
2519 for (size_t i = 0; i < new_streams->count(); ++i) {
2520 MediaStreamInterface* new_stream = new_streams->at(i);
2521 stats_->AddStream(new_stream);
2522 observer_->OnAddStream(
2523 rtc::scoped_refptr<MediaStreamInterface>(new_stream));
2524 }
deadbeefab9b2d12015-10-14 11:33:11 -07002525
Steve Antondcc3c022017-12-22 16:02:54 -08002526 UpdateEndedRemoteMediaStreams();
2527 }
deadbeefab9b2d12015-10-14 11:33:11 -07002528
Steve Anton8a006912017-12-04 15:25:56 -08002529 return RTCError::OK();
deadbeeffc648b62015-10-13 16:42:33 -07002530}
2531
Steve Antondcc3c022017-12-22 16:02:54 -08002532RTCError PeerConnection::UpdateTransceiversAndDataChannels(
2533 cricket::ContentSource source,
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002534 const SessionDescriptionInterface& new_session,
2535 const SessionDescriptionInterface* old_local_description,
2536 const SessionDescriptionInterface* old_remote_description) {
Steve Antondcc3c022017-12-22 16:02:54 -08002537 RTC_DCHECK(IsUnifiedPlan());
2538
Steve Anton7464fca2018-01-19 11:10:37 -08002539 const cricket::ContentGroup* bundle_group = nullptr;
2540 if (new_session.GetType() == SdpType::kOffer) {
2541 auto bundle_group_or_error =
2542 GetEarlyBundleGroup(*new_session.description());
2543 if (!bundle_group_or_error.ok()) {
2544 return bundle_group_or_error.MoveError();
2545 }
2546 bundle_group = bundle_group_or_error.MoveValue();
Steve Antondcc3c022017-12-22 16:02:54 -08002547 }
Steve Antondcc3c022017-12-22 16:02:54 -08002548
Steve Antondcc3c022017-12-22 16:02:54 -08002549 const ContentInfos& new_contents = new_session.description()->contents();
Steve Antondcc3c022017-12-22 16:02:54 -08002550 for (size_t i = 0; i < new_contents.size(); ++i) {
2551 const cricket::ContentInfo& new_content = new_contents[i];
Steve Antondcc3c022017-12-22 16:02:54 -08002552 cricket::MediaType media_type = new_content.media_description()->type();
2553 seen_mids_.insert(new_content.name);
2554 if (media_type == cricket::MEDIA_TYPE_AUDIO ||
2555 media_type == cricket::MEDIA_TYPE_VIDEO) {
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002556 const cricket::ContentInfo* old_local_content = nullptr;
2557 if (old_local_description &&
2558 i < old_local_description->description()->contents().size()) {
2559 old_local_content =
2560 &old_local_description->description()->contents()[i];
2561 }
2562 const cricket::ContentInfo* old_remote_content = nullptr;
2563 if (old_remote_description &&
2564 i < old_remote_description->description()->contents().size()) {
2565 old_remote_content =
2566 &old_remote_description->description()->contents()[i];
2567 }
Steve Antondcc3c022017-12-22 16:02:54 -08002568 auto transceiver_or_error =
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002569 AssociateTransceiver(source, new_session.GetType(), i, new_content,
2570 old_local_content, old_remote_content);
Steve Antondcc3c022017-12-22 16:02:54 -08002571 if (!transceiver_or_error.ok()) {
2572 return transceiver_or_error.MoveError();
2573 }
2574 auto transceiver = transceiver_or_error.MoveValue();
Steve Antondcc3c022017-12-22 16:02:54 -08002575 RTCError error =
2576 UpdateTransceiverChannel(transceiver, new_content, bundle_group);
2577 if (!error.ok()) {
2578 return error;
2579 }
2580 } else if (media_type == cricket::MEDIA_TYPE_DATA) {
Steve Antonfa2260d2017-12-28 16:38:23 -08002581 if (GetDataMid() && new_content.name != *GetDataMid()) {
2582 // Ignore all but the first data section.
Steve Anton3d954a62018-04-02 11:27:23 -07002583 RTC_LOG(LS_INFO) << "Ignoring data media section with MID="
2584 << new_content.name;
Steve Antonfa2260d2017-12-28 16:38:23 -08002585 continue;
2586 }
2587 RTCError error = UpdateDataChannel(source, new_content, bundle_group);
2588 if (!error.ok()) {
2589 return error;
2590 }
Steve Antondcc3c022017-12-22 16:02:54 -08002591 } else {
2592 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
2593 "Unknown section type.");
2594 }
2595 }
2596
2597 return RTCError::OK();
2598}
2599
2600RTCError PeerConnection::UpdateTransceiverChannel(
2601 rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
2602 transceiver,
2603 const cricket::ContentInfo& content,
2604 const cricket::ContentGroup* bundle_group) {
2605 RTC_DCHECK(IsUnifiedPlan());
2606 RTC_DCHECK(transceiver);
2607 cricket::BaseChannel* channel = transceiver->internal()->channel();
2608 if (content.rejected) {
2609 if (channel) {
2610 transceiver->internal()->SetChannel(nullptr);
2611 DestroyBaseChannel(channel);
2612 }
2613 } else {
2614 if (!channel) {
Steve Anton69470252018-02-09 11:43:08 -08002615 if (transceiver->media_type() == cricket::MEDIA_TYPE_AUDIO) {
Zhi Huange830e682018-03-30 10:48:35 -07002616 channel = CreateVoiceChannel(content.name);
Steve Antondcc3c022017-12-22 16:02:54 -08002617 } else {
Steve Anton69470252018-02-09 11:43:08 -08002618 RTC_DCHECK_EQ(cricket::MEDIA_TYPE_VIDEO, transceiver->media_type());
Zhi Huange830e682018-03-30 10:48:35 -07002619 channel = CreateVideoChannel(content.name);
Steve Antondcc3c022017-12-22 16:02:54 -08002620 }
2621 if (!channel) {
2622 LOG_AND_RETURN_ERROR(
2623 RTCErrorType::INTERNAL_ERROR,
2624 "Failed to create channel for mid=" + content.name);
2625 }
2626 transceiver->internal()->SetChannel(channel);
2627 }
2628 }
2629 return RTCError::OK();
2630}
2631
Steve Antonfa2260d2017-12-28 16:38:23 -08002632RTCError PeerConnection::UpdateDataChannel(
2633 cricket::ContentSource source,
2634 const cricket::ContentInfo& content,
2635 const cricket::ContentGroup* bundle_group) {
2636 if (data_channel_type_ == cricket::DCT_NONE) {
Steve Antondbf9d032018-01-19 15:23:40 -08002637 // If data channels are disabled, ignore this media section. CreateAnswer
2638 // will take care of rejecting it.
2639 return RTCError::OK();
Steve Antonfa2260d2017-12-28 16:38:23 -08002640 }
2641 if (content.rejected) {
2642 DestroyDataChannel();
2643 } else {
2644 if (!rtp_data_channel_ && !sctp_transport_) {
Zhi Huange830e682018-03-30 10:48:35 -07002645 if (!CreateDataChannel(content.name)) {
Steve Antonfa2260d2017-12-28 16:38:23 -08002646 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
2647 "Failed to create data channel.");
2648 }
2649 }
2650 if (source == cricket::CS_REMOTE) {
2651 const MediaContentDescription* data_desc = content.media_description();
2652 if (data_desc && cricket::IsRtpProtocol(data_desc->protocol())) {
2653 UpdateRemoteRtpDataChannels(GetActiveStreams(data_desc));
2654 }
2655 }
2656 }
2657 return RTCError::OK();
2658}
2659
Steve Antondcc3c022017-12-22 16:02:54 -08002660RTCErrorOr<rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
2661PeerConnection::AssociateTransceiver(cricket::ContentSource source,
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002662 SdpType type,
Steve Antondcc3c022017-12-22 16:02:54 -08002663 size_t mline_index,
2664 const ContentInfo& content,
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002665 const ContentInfo* old_local_content,
2666 const ContentInfo* old_remote_content) {
Steve Antondcc3c022017-12-22 16:02:54 -08002667 RTC_DCHECK(IsUnifiedPlan());
Seth Hampsonae8a90a2018-02-13 15:33:48 -08002668 // If this is an offer then the m= section might be recycled. If the m=
2669 // section is being recycled (defined as: rejected in the current local or
2670 // remote description and not rejected in new description), dissociate the
2671 // currently associated RtpTransceiver by setting its mid property to null,
2672 // and discard the mapping between the transceiver and its m= section index.
2673 if (IsMediaSectionBeingRecycled(type, content, old_local_content,
2674 old_remote_content)) {
2675 // We want to dissociate the transceiver that has the rejected mid.
2676 const std::string& old_mid =
2677 (old_local_content && old_local_content->rejected)
2678 ? old_local_content->name
2679 : old_remote_content->name;
2680 auto old_transceiver = GetAssociatedTransceiver(old_mid);
Steve Antondcc3c022017-12-22 16:02:54 -08002681 if (old_transceiver) {
Steve Anton3d954a62018-04-02 11:27:23 -07002682 RTC_LOG(LS_INFO) << "Dissociating transceiver for MID=" << old_mid
2683 << " since the media section is being recycled.";
Steve Antondcc3c022017-12-22 16:02:54 -08002684 old_transceiver->internal()->set_mid(rtc::nullopt);
2685 old_transceiver->internal()->set_mline_index(rtc::nullopt);
2686 }
2687 }
2688 const MediaContentDescription* media_desc = content.media_description();
2689 auto transceiver = GetAssociatedTransceiver(content.name);
2690 if (source == cricket::CS_LOCAL) {
2691 // Find the RtpTransceiver that corresponds to this m= section, using the
2692 // mapping between transceivers and m= section indices established when
2693 // creating the offer.
2694 if (!transceiver) {
2695 transceiver = GetTransceiverByMLineIndex(mline_index);
2696 }
2697 if (!transceiver) {
2698 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
2699 "Unknown transceiver");
2700 }
2701 } else {
2702 RTC_DCHECK_EQ(source, cricket::CS_REMOTE);
2703 // If the m= section is sendrecv or recvonly, and there are RtpTransceivers
2704 // of the same type...
2705 if (!transceiver &&
2706 RtpTransceiverDirectionHasRecv(media_desc->direction())) {
2707 transceiver = FindAvailableTransceiverToReceive(media_desc->type());
2708 }
2709 // If no RtpTransceiver was found in the previous step, create one with a
2710 // recvonly direction.
2711 if (!transceiver) {
Steve Anton3d954a62018-04-02 11:27:23 -07002712 RTC_LOG(LS_INFO) << "Adding "
2713 << cricket::MediaTypeToString(media_desc->type())
2714 << " transceiver for MID=" << content.name
2715 << " at i=" << mline_index
2716 << " in response to the remote description.";
Steve Anton02ee47c2018-01-10 16:26:06 -08002717 auto sender =
2718 CreateSender(media_desc->type(), nullptr, {rtc::CreateRandomUuid()});
Steve Anton5f94aa22018-02-01 10:58:30 -08002719 std::string receiver_id;
2720 if (!media_desc->streams().empty()) {
2721 receiver_id = media_desc->streams()[0].id;
2722 } else {
2723 receiver_id = rtc::CreateRandomUuid();
2724 }
2725 auto receiver = CreateReceiver(media_desc->type(), receiver_id);
Steve Anton02ee47c2018-01-10 16:26:06 -08002726 transceiver = CreateAndAddTransceiver(sender, receiver);
Steve Antondcc3c022017-12-22 16:02:54 -08002727 transceiver->internal()->set_direction(
2728 RtpTransceiverDirection::kRecvOnly);
2729 }
2730 }
2731 RTC_DCHECK(transceiver);
Steve Anton69470252018-02-09 11:43:08 -08002732 if (transceiver->media_type() != media_desc->type()) {
Steve Antondcc3c022017-12-22 16:02:54 -08002733 LOG_AND_RETURN_ERROR(
2734 RTCErrorType::INVALID_PARAMETER,
2735 "Transceiver type does not match media description type.");
2736 }
2737 // Associate the found or created RtpTransceiver with the m= section by
2738 // setting the value of the RtpTransceiver's mid property to the MID of the m=
2739 // section, and establish a mapping between the transceiver and the index of
2740 // the m= section.
2741 transceiver->internal()->set_mid(content.name);
2742 transceiver->internal()->set_mline_index(mline_index);
2743 return std::move(transceiver);
2744}
2745
2746rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
2747PeerConnection::GetAssociatedTransceiver(const std::string& mid) const {
2748 RTC_DCHECK(IsUnifiedPlan());
2749 for (auto transceiver : transceivers_) {
2750 if (transceiver->mid() == mid) {
2751 return transceiver;
2752 }
2753 }
2754 return nullptr;
2755}
2756
2757rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
2758PeerConnection::GetTransceiverByMLineIndex(size_t mline_index) const {
2759 RTC_DCHECK(IsUnifiedPlan());
2760 for (auto transceiver : transceivers_) {
2761 if (transceiver->internal()->mline_index() == mline_index) {
2762 return transceiver;
2763 }
2764 }
2765 return nullptr;
2766}
2767
2768rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
2769PeerConnection::FindAvailableTransceiverToReceive(
2770 cricket::MediaType media_type) const {
2771 RTC_DCHECK(IsUnifiedPlan());
2772 // From JSEP section 5.10 (Applying a Remote Description):
2773 // If the m= section is sendrecv or recvonly, and there are RtpTransceivers of
2774 // the same type that were added to the PeerConnection by addTrack and are not
2775 // associated with any m= section and are not stopped, find the first such
2776 // RtpTransceiver.
2777 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -08002778 if (transceiver->media_type() == media_type &&
Steve Antondcc3c022017-12-22 16:02:54 -08002779 transceiver->internal()->created_by_addtrack() && !transceiver->mid() &&
2780 !transceiver->stopped()) {
2781 return transceiver;
2782 }
2783 }
2784 return nullptr;
2785}
2786
Steve Antoned10bd92017-12-05 10:52:59 -08002787const cricket::ContentInfo* PeerConnection::FindMediaSectionForTransceiver(
2788 rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
2789 transceiver,
2790 const SessionDescriptionInterface* sdesc) const {
2791 RTC_DCHECK(transceiver);
2792 RTC_DCHECK(sdesc);
2793 if (IsUnifiedPlan()) {
2794 if (!transceiver->internal()->mid()) {
2795 // This transceiver is not associated with a media section yet.
2796 return nullptr;
2797 }
2798 return sdesc->description()->GetContentByName(
2799 *transceiver->internal()->mid());
2800 } else {
2801 // Plan B only allows at most one audio and one video section, so use the
2802 // first media section of that type.
2803 return cricket::GetFirstMediaContent(sdesc->description()->contents(),
Steve Anton69470252018-02-09 11:43:08 -08002804 transceiver->media_type());
Steve Antoned10bd92017-12-05 10:52:59 -08002805 }
2806}
2807
deadbeef46c73892016-11-16 19:42:04 -08002808PeerConnectionInterface::RTCConfiguration PeerConnection::GetConfiguration() {
2809 return configuration_;
2810}
2811
deadbeef293e9262017-01-11 12:28:30 -08002812bool PeerConnection::SetConfiguration(const RTCConfiguration& configuration,
2813 RTCError* error) {
Peter Boström1a9d6152015-12-08 22:15:17 +01002814 TRACE_EVENT0("webrtc", "PeerConnection::SetConfiguration");
deadbeef6de92f92016-12-12 18:49:32 -08002815
Qingsi Wanga2d60672018-04-11 16:57:45 -07002816 // According to JSEP, after setLocalDescription, changing the candidate pool
2817 // size is not allowed, and changing the set of ICE servers will not result
2818 // in new candidates being gathered.
Steve Anton75737c02017-11-06 10:37:17 -08002819 if (local_description() && configuration.ice_candidate_pool_size !=
2820 configuration_.ice_candidate_pool_size) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002821 RTC_LOG(LS_ERROR) << "Can't change candidate pool size after calling "
2822 "SetLocalDescription.";
deadbeef293e9262017-01-11 12:28:30 -08002823 return SafeSetError(RTCErrorType::INVALID_MODIFICATION, error);
buildbot@webrtc.org41451d42014-05-03 05:39:45 +00002824 }
Taylor Brandstettera1c30352016-05-13 08:15:11 -07002825
deadbeef293e9262017-01-11 12:28:30 -08002826 // The simplest (and most future-compatible) way to tell if the config was
2827 // modified in an invalid way is to copy each property we do support
2828 // modifying, then use operator==. There are far more properties we don't
2829 // support modifying than those we do, and more could be added.
2830 RTCConfiguration modified_config = configuration_;
2831 modified_config.servers = configuration.servers;
2832 modified_config.type = configuration.type;
2833 modified_config.ice_candidate_pool_size =
2834 configuration.ice_candidate_pool_size;
2835 modified_config.prune_turn_ports = configuration.prune_turn_ports;
skvladd1f5fda2017-02-03 16:54:05 -08002836 modified_config.ice_check_min_interval = configuration.ice_check_min_interval;
Qingsi Wange6826d22018-03-08 14:55:14 -08002837 modified_config.ice_check_interval_strong_connectivity =
2838 configuration.ice_check_interval_strong_connectivity;
2839 modified_config.ice_check_interval_weak_connectivity =
2840 configuration.ice_check_interval_weak_connectivity;
Qingsi Wang22e623a2018-03-13 10:53:57 -07002841 modified_config.ice_unwritable_timeout = configuration.ice_unwritable_timeout;
2842 modified_config.ice_unwritable_min_checks =
2843 configuration.ice_unwritable_min_checks;
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08002844 modified_config.stun_candidate_keepalive_interval =
2845 configuration.stun_candidate_keepalive_interval;
Jonas Orelandbdcee282017-10-10 14:01:40 +02002846 modified_config.turn_customizer = configuration.turn_customizer;
Qingsi Wang9a5c6f82018-02-01 10:38:40 -08002847 modified_config.network_preference = configuration.network_preference;
deadbeef293e9262017-01-11 12:28:30 -08002848 if (configuration != modified_config) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002849 RTC_LOG(LS_ERROR) << "Modifying the configuration in an unsupported way.";
deadbeef293e9262017-01-11 12:28:30 -08002850 return SafeSetError(RTCErrorType::INVALID_MODIFICATION, error);
2851 }
2852
Steve Anton038834f2017-07-14 15:59:59 -07002853 // Validate the modified configuration.
2854 RTCError validate_error = ValidateConfiguration(modified_config);
2855 if (!validate_error.ok()) {
2856 return SafeSetError(std::move(validate_error), error);
2857 }
2858
deadbeef293e9262017-01-11 12:28:30 -08002859 // Note that this isn't possible through chromium, since it's an unsigned
2860 // short in WebIDL.
2861 if (configuration.ice_candidate_pool_size < 0 ||
2862 configuration.ice_candidate_pool_size > UINT16_MAX) {
2863 return SafeSetError(RTCErrorType::INVALID_RANGE, error);
2864 }
2865
2866 // Parse ICE servers before hopping to network thread.
2867 cricket::ServerAddresses stun_servers;
2868 std::vector<cricket::RelayServerConfig> turn_servers;
2869 RTCErrorType parse_error =
2870 ParseIceServers(configuration.servers, &stun_servers, &turn_servers);
2871 if (parse_error != RTCErrorType::NONE) {
2872 return SafeSetError(parse_error, error);
2873 }
2874
2875 // In theory this shouldn't fail.
2876 if (!network_thread()->Invoke<bool>(
2877 RTC_FROM_HERE,
2878 rtc::Bind(&PeerConnection::ReconfigurePortAllocator_n, this,
2879 stun_servers, turn_servers, modified_config.type,
2880 modified_config.ice_candidate_pool_size,
Jonas Orelandbdcee282017-10-10 14:01:40 +02002881 modified_config.prune_turn_ports,
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08002882 modified_config.turn_customizer,
2883 modified_config.stun_candidate_keepalive_interval))) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002884 RTC_LOG(LS_ERROR) << "Failed to apply configuration to PortAllocator.";
deadbeef293e9262017-01-11 12:28:30 -08002885 return SafeSetError(RTCErrorType::INTERNAL_ERROR, error);
2886 }
Honghai Zhang4cedf2b2016-08-31 08:18:11 -07002887
deadbeefd1a38b52016-12-10 13:15:33 -08002888 // As described in JSEP, calling setConfiguration with new ICE servers or
2889 // candidate policy must set a "needs-ice-restart" bit so that the next offer
2890 // triggers an ICE restart which will pick up the changes.
deadbeef293e9262017-01-11 12:28:30 -08002891 if (modified_config.servers != configuration_.servers ||
2892 modified_config.type != configuration_.type ||
2893 modified_config.prune_turn_ports != configuration_.prune_turn_ports) {
Steve Antond25da372017-11-06 14:50:29 -08002894 transport_controller_->SetNeedsIceRestartFlag();
deadbeefd1a38b52016-12-10 13:15:33 -08002895 }
skvladd1f5fda2017-02-03 16:54:05 -08002896
Qingsi Wang9c98f0c2018-02-15 15:10:59 -08002897 transport_controller_->SetIceConfig(ParseIceConfig(modified_config));
skvladd1f5fda2017-02-03 16:54:05 -08002898
deadbeef293e9262017-01-11 12:28:30 -08002899 configuration_ = modified_config;
2900 return SafeSetError(RTCErrorType::NONE, error);
buildbot@webrtc.org41451d42014-05-03 05:39:45 +00002901}
2902
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002903bool PeerConnection::AddIceCandidate(
2904 const IceCandidateInterface* ice_candidate) {
Peter Boström1a9d6152015-12-08 22:15:17 +01002905 TRACE_EVENT0("webrtc", "PeerConnection::AddIceCandidate");
zhihuang29ff8442016-07-27 11:07:25 -07002906 if (IsClosed()) {
2907 return false;
2908 }
Steve Antond25da372017-11-06 14:50:29 -08002909
2910 if (!remote_description()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002911 RTC_LOG(LS_ERROR) << "ProcessIceMessage: ICE candidates can't be added "
Jonas Olsson45cc8902018-02-13 10:37:07 +01002912 "without any remote session description.";
Steve Antond25da372017-11-06 14:50:29 -08002913 return false;
2914 }
2915
2916 if (!ice_candidate) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002917 RTC_LOG(LS_ERROR) << "ProcessIceMessage: Candidate is NULL.";
Steve Antond25da372017-11-06 14:50:29 -08002918 return false;
2919 }
2920
2921 bool valid = false;
2922 bool ready = ReadyToUseRemoteCandidate(ice_candidate, nullptr, &valid);
2923 if (!valid) {
2924 return false;
2925 }
2926
2927 // Add this candidate to the remote session description.
2928 if (!mutable_remote_description()->AddCandidate(ice_candidate)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002929 RTC_LOG(LS_ERROR) << "ProcessIceMessage: Candidate cannot be used.";
Steve Antond25da372017-11-06 14:50:29 -08002930 return false;
2931 }
2932
2933 if (ready) {
2934 return UseCandidate(ice_candidate);
2935 } else {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002936 RTC_LOG(LS_INFO) << "ProcessIceMessage: Not ready to use candidate.";
Steve Antond25da372017-11-06 14:50:29 -08002937 return true;
2938 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00002939}
2940
Honghai Zhang7fb69db2016-03-14 11:59:18 -07002941bool PeerConnection::RemoveIceCandidates(
2942 const std::vector<cricket::Candidate>& candidates) {
2943 TRACE_EVENT0("webrtc", "PeerConnection::RemoveIceCandidates");
Steve Antond25da372017-11-06 14:50:29 -08002944 if (!remote_description()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002945 RTC_LOG(LS_ERROR) << "RemoveRemoteIceCandidates: ICE candidates can't be "
Jonas Olsson45cc8902018-02-13 10:37:07 +01002946 "removed without any remote session description.";
Steve Antond25da372017-11-06 14:50:29 -08002947 return false;
2948 }
2949
2950 if (candidates.empty()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002951 RTC_LOG(LS_ERROR) << "RemoveRemoteIceCandidates: candidates are empty.";
Steve Antond25da372017-11-06 14:50:29 -08002952 return false;
2953 }
2954
2955 size_t number_removed =
2956 mutable_remote_description()->RemoveCandidates(candidates);
2957 if (number_removed != candidates.size()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01002958 RTC_LOG(LS_ERROR)
2959 << "RemoveRemoteIceCandidates: Failed to remove candidates. "
Jonas Olsson45cc8902018-02-13 10:37:07 +01002960 "Requested "
2961 << candidates.size() << " but only " << number_removed
Mirko Bonadei675513b2017-11-09 11:09:25 +01002962 << " are removed.";
Steve Antond25da372017-11-06 14:50:29 -08002963 }
2964
2965 // Remove the candidates from the transport controller.
Zhi Huange830e682018-03-30 10:48:35 -07002966 RTCError error = transport_controller_->RemoveRemoteCandidates(candidates);
2967 if (!error.ok()) {
2968 RTC_LOG(LS_ERROR) << "Error when removing remote candidates: "
2969 << error.message();
Steve Antond25da372017-11-06 14:50:29 -08002970 }
2971 return true;
Honghai Zhang7fb69db2016-03-14 11:59:18 -07002972}
2973
buildbot@webrtc.org1567b8c2014-05-08 19:54:16 +00002974void PeerConnection::RegisterUMAObserver(UMAObserver* observer) {
Peter Boström1a9d6152015-12-08 22:15:17 +01002975 TRACE_EVENT0("webrtc", "PeerConnection::RegisterUmaObserver");
Qingsi Wanga2d60672018-04-11 16:57:45 -07002976 network_thread()->Invoke<void>(
2977 RTC_FROM_HERE,
2978 rtc::Bind(&PeerConnection::SetMetricObserver_n, this, observer));
2979 // Send information about IPv4/IPv6 status.
2980 if (uma_observer_) {
2981 if (port_allocator_flags_ & cricket::PORTALLOCATOR_ENABLE_IPV6) {
2982 uma_observer_->IncrementEnumCounter(
2983 kEnumCounterAddressFamily, kPeerConnection_IPv6,
2984 kPeerConnectionAddressFamilyCounter_Max);
2985 } else {
2986 uma_observer_->IncrementEnumCounter(
2987 kEnumCounterAddressFamily, kPeerConnection_IPv4,
2988 kPeerConnectionAddressFamilyCounter_Max);
2989 }
2990 }
2991}
Patrik Höglund3dc41062018-04-11 11:13:57 +00002992
Qingsi Wanga2d60672018-04-11 16:57:45 -07002993void PeerConnection::SetMetricObserver_n(UMAObserver* observer) {
2994 RTC_DCHECK(network_thread()->IsCurrent());
2995 uma_observer_ = observer;
Patrik Höglund3dc41062018-04-11 11:13:57 +00002996 if (transport_controller()) {
2997 transport_controller()->SetMetricsObserver(uma_observer_);
2998 }
2999
3000 for (auto transceiver : transceivers_) {
3001 auto* channel = transceiver->internal()->channel();
3002 if (channel) {
3003 channel->SetMetricsObserver(uma_observer_);
3004 }
3005 }
3006
deadbeef293e9262017-01-11 12:28:30 -08003007 if (uma_observer_) {
Patrik Höglund3dc41062018-04-11 11:13:57 +00003008 port_allocator_->SetMetricsObserver(uma_observer_);
mallinath@webrtc.orgd37bcfa2014-05-12 23:10:18 +00003009 }
buildbot@webrtc.org1567b8c2014-05-08 19:54:16 +00003010}
3011
zstein4b979802017-06-02 14:37:37 -07003012RTCError PeerConnection::SetBitrate(const BitrateParameters& bitrate) {
Steve Anton978b8762017-09-29 12:15:02 -07003013 if (!worker_thread()->IsCurrent()) {
3014 return worker_thread()->Invoke<RTCError>(
zstein4b979802017-06-02 14:37:37 -07003015 RTC_FROM_HERE, rtc::Bind(&PeerConnection::SetBitrate, this, bitrate));
3016 }
3017
3018 const bool has_min = static_cast<bool>(bitrate.min_bitrate_bps);
3019 const bool has_current = static_cast<bool>(bitrate.current_bitrate_bps);
3020 const bool has_max = static_cast<bool>(bitrate.max_bitrate_bps);
3021 if (has_min && *bitrate.min_bitrate_bps < 0) {
3022 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3023 "min_bitrate_bps <= 0");
3024 }
3025 if (has_current) {
3026 if (has_min && *bitrate.current_bitrate_bps < *bitrate.min_bitrate_bps) {
3027 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3028 "current_bitrate_bps < min_bitrate_bps");
3029 } else if (*bitrate.current_bitrate_bps < 0) {
3030 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3031 "curent_bitrate_bps < 0");
3032 }
3033 }
3034 if (has_max) {
3035 if (has_current &&
3036 *bitrate.max_bitrate_bps < *bitrate.current_bitrate_bps) {
3037 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3038 "max_bitrate_bps < current_bitrate_bps");
3039 } else if (has_min && *bitrate.max_bitrate_bps < *bitrate.min_bitrate_bps) {
3040 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3041 "max_bitrate_bps < min_bitrate_bps");
3042 } else if (*bitrate.max_bitrate_bps < 0) {
3043 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
3044 "max_bitrate_bps < 0");
3045 }
3046 }
3047
Sebastian Janssonfc8d26b2018-02-21 09:52:06 +01003048 BitrateConstraintsMask mask;
zstein4b979802017-06-02 14:37:37 -07003049 mask.min_bitrate_bps = bitrate.min_bitrate_bps;
3050 mask.start_bitrate_bps = bitrate.current_bitrate_bps;
3051 mask.max_bitrate_bps = bitrate.max_bitrate_bps;
3052
3053 RTC_DCHECK(call_.get());
Sebastian Jansson8f83b422018-02-21 13:07:13 +01003054 call_->GetTransportControllerSend()->SetClientBitratePreferences(mask);
zstein4b979802017-06-02 14:37:37 -07003055
3056 return RTCError::OK();
3057}
3058
Alex Narest78609d52017-10-20 10:37:47 +02003059void PeerConnection::SetBitrateAllocationStrategy(
3060 std::unique_ptr<rtc::BitrateAllocationStrategy>
3061 bitrate_allocation_strategy) {
3062 rtc::Thread* worker_thread = factory_->worker_thread();
3063 if (!worker_thread->IsCurrent()) {
3064 rtc::BitrateAllocationStrategy* strategy_raw =
3065 bitrate_allocation_strategy.release();
3066 auto functor = [this, strategy_raw]() {
3067 call_->SetBitrateAllocationStrategy(
3068 rtc::WrapUnique<rtc::BitrateAllocationStrategy>(strategy_raw));
3069 };
3070 worker_thread->Invoke<void>(RTC_FROM_HERE, functor);
3071 return;
3072 }
3073 RTC_DCHECK(call_.get());
3074 call_->SetBitrateAllocationStrategy(std::move(bitrate_allocation_strategy));
3075}
3076
henrika5f6bf242017-11-01 11:06:56 +01003077void PeerConnection::SetAudioPlayout(bool playout) {
3078 if (!worker_thread()->IsCurrent()) {
3079 worker_thread()->Invoke<void>(
3080 RTC_FROM_HERE,
3081 rtc::Bind(&PeerConnection::SetAudioPlayout, this, playout));
3082 return;
3083 }
3084 auto audio_state =
3085 factory_->channel_manager()->media_engine()->GetAudioState();
3086 audio_state->SetPlayout(playout);
3087}
3088
3089void PeerConnection::SetAudioRecording(bool recording) {
3090 if (!worker_thread()->IsCurrent()) {
3091 worker_thread()->Invoke<void>(
3092 RTC_FROM_HERE,
3093 rtc::Bind(&PeerConnection::SetAudioRecording, this, recording));
3094 return;
3095 }
3096 auto audio_state =
3097 factory_->channel_manager()->media_engine()->GetAudioState();
3098 audio_state->SetRecording(recording);
3099}
3100
Steve Anton8c0f7a72017-10-03 10:03:10 -07003101std::unique_ptr<rtc::SSLCertificate>
3102PeerConnection::GetRemoteAudioSSLCertificate() {
Taylor Brandstetterc3928662018-02-23 13:04:51 -08003103 std::unique_ptr<rtc::SSLCertChain> chain = GetRemoteAudioSSLCertChain();
3104 if (!chain || !chain->GetSize()) {
Steve Anton8c0f7a72017-10-03 10:03:10 -07003105 return nullptr;
3106 }
Taylor Brandstetterc3928662018-02-23 13:04:51 -08003107 return chain->Get(0).GetUniqueReference();
Steve Anton8c0f7a72017-10-03 10:03:10 -07003108}
3109
Zhi Huang70b820f2018-01-27 14:16:15 -08003110std::unique_ptr<rtc::SSLCertChain>
3111PeerConnection::GetRemoteAudioSSLCertChain() {
Steve Antonafb0bb72018-02-20 11:35:37 -08003112 auto audio_transceiver = GetFirstAudioTransceiver();
3113 if (!audio_transceiver || !audio_transceiver->internal()->channel()) {
Zhi Huang70b820f2018-01-27 14:16:15 -08003114 return nullptr;
3115 }
Zhi Huang70b820f2018-01-27 14:16:15 -08003116 return transport_controller_->GetRemoteSSLCertChain(
Steve Antonafb0bb72018-02-20 11:35:37 -08003117 audio_transceiver->internal()->channel()->transport_name());
3118}
3119
3120rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
3121PeerConnection::GetFirstAudioTransceiver() const {
3122 for (auto transceiver : transceivers_) {
3123 if (transceiver->media_type() == cricket::MEDIA_TYPE_AUDIO) {
3124 return transceiver;
3125 }
3126 }
3127 return nullptr;
Zhi Huang70b820f2018-01-27 14:16:15 -08003128}
3129
ivoc14d5dbe2016-07-04 07:06:55 -07003130bool PeerConnection::StartRtcEventLog(rtc::PlatformFile file,
3131 int64_t max_size_bytes) {
Elad Alon99c3fe52017-10-13 16:29:40 +02003132 // TODO(eladalon): It would be better to not allow negative values into PC.
3133 const size_t max_size = (max_size_bytes < 0)
3134 ? RtcEventLog::kUnlimitedOutput
3135 : rtc::saturated_cast<size_t>(max_size_bytes);
3136 return StartRtcEventLog(
Bjorn Tereliusde939432017-11-20 17:38:14 +01003137 rtc::MakeUnique<RtcEventLogOutputFile>(file, max_size),
3138 webrtc::RtcEventLog::kImmediateOutput);
Elad Alon99c3fe52017-10-13 16:29:40 +02003139}
3140
Bjorn Tereliusde939432017-11-20 17:38:14 +01003141bool PeerConnection::StartRtcEventLog(std::unique_ptr<RtcEventLogOutput> output,
3142 int64_t output_period_ms) {
Karl Wibergd6b48192017-10-16 23:01:06 +02003143 // TODO(eladalon): In C++14, this can be done with a lambda.
3144 struct Functor {
Bjorn Tereliusde939432017-11-20 17:38:14 +01003145 bool operator()() {
3146 return pc->StartRtcEventLog_w(std::move(output), output_period_ms);
3147 }
Karl Wibergd6b48192017-10-16 23:01:06 +02003148 PeerConnection* const pc;
3149 std::unique_ptr<RtcEventLogOutput> output;
Bjorn Tereliusde939432017-11-20 17:38:14 +01003150 const int64_t output_period_ms;
Elad Alon99c3fe52017-10-13 16:29:40 +02003151 };
Bjorn Tereliusde939432017-11-20 17:38:14 +01003152 return worker_thread()->Invoke<bool>(
3153 RTC_FROM_HERE, Functor{this, std::move(output), output_period_ms});
ivoc14d5dbe2016-07-04 07:06:55 -07003154}
3155
3156void PeerConnection::StopRtcEventLog() {
Steve Anton978b8762017-09-29 12:15:02 -07003157 worker_thread()->Invoke<void>(
ivoc14d5dbe2016-07-04 07:06:55 -07003158 RTC_FROM_HERE, rtc::Bind(&PeerConnection::StopRtcEventLog_w, this));
3159}
3160
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003161const SessionDescriptionInterface* PeerConnection::local_description() const {
Steve Anton75737c02017-11-06 10:37:17 -08003162 return pending_local_description_ ? pending_local_description_.get()
3163 : current_local_description_.get();
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003164}
3165
3166const SessionDescriptionInterface* PeerConnection::remote_description() const {
Steve Anton75737c02017-11-06 10:37:17 -08003167 return pending_remote_description_ ? pending_remote_description_.get()
3168 : current_remote_description_.get();
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003169}
3170
deadbeeffe4a8a42016-12-20 17:56:17 -08003171const SessionDescriptionInterface* PeerConnection::current_local_description()
3172 const {
Steve Anton75737c02017-11-06 10:37:17 -08003173 return current_local_description_.get();
deadbeeffe4a8a42016-12-20 17:56:17 -08003174}
3175
3176const SessionDescriptionInterface* PeerConnection::current_remote_description()
3177 const {
Steve Anton75737c02017-11-06 10:37:17 -08003178 return current_remote_description_.get();
deadbeeffe4a8a42016-12-20 17:56:17 -08003179}
3180
3181const SessionDescriptionInterface* PeerConnection::pending_local_description()
3182 const {
Steve Anton75737c02017-11-06 10:37:17 -08003183 return pending_local_description_.get();
deadbeeffe4a8a42016-12-20 17:56:17 -08003184}
3185
3186const SessionDescriptionInterface* PeerConnection::pending_remote_description()
3187 const {
Steve Anton75737c02017-11-06 10:37:17 -08003188 return pending_remote_description_.get();
deadbeeffe4a8a42016-12-20 17:56:17 -08003189}
3190
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003191void PeerConnection::Close() {
Peter Boström1a9d6152015-12-08 22:15:17 +01003192 TRACE_EVENT0("webrtc", "PeerConnection::Close");
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003193 // Update stats here so that we have the most recent stats for tracks and
3194 // streams before the channels are closed.
tommi@webrtc.org03505bc2014-07-14 20:15:26 +00003195 stats_->UpdateStats(kStatsOutputLevelStandard);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003196
Steve Anton75737c02017-11-06 10:37:17 -08003197 ChangeSignalingState(PeerConnectionInterface::kClosed);
Steve Anton3fe1b152017-12-12 10:20:08 -08003198
Steve Anton8af21862017-12-15 11:20:13 -08003199 for (auto transceiver : transceivers_) {
3200 transceiver->Stop();
3201 }
3202 DestroyAllChannels();
Steve Anton75737c02017-11-06 10:37:17 -08003203
Qingsi Wang93a84392018-01-30 17:13:09 -08003204 // The event log is used in the transport controller, which must be outlived
3205 // by the former. CreateOffer by the peer connection is implemented
3206 // asynchronously and if the peer connection is closed without resetting the
3207 // WebRTC session description factory, the session description factory would
3208 // call the transport controller.
3209 webrtc_session_desc_factory_.reset();
3210 transport_controller_.reset();
3211
deadbeef42a42632017-03-10 15:18:00 -08003212 network_thread()->Invoke<void>(
3213 RTC_FROM_HERE,
3214 rtc::Bind(&cricket::PortAllocator::DiscardCandidatePool,
3215 port_allocator_.get()));
nisseeaabdf62017-05-05 02:23:02 -07003216
Steve Anton978b8762017-09-29 12:15:02 -07003217 worker_thread()->Invoke<void>(RTC_FROM_HERE, [this] {
eladalon248fd4f2017-09-06 05:18:15 -07003218 call_.reset();
3219 // The event log must outlive call (and any other object that uses it).
3220 event_log_.reset();
3221 });
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003222}
3223
buildbot@webrtc.orgd4e598d2014-07-29 17:36:52 +00003224void PeerConnection::OnMessage(rtc::Message* msg) {
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003225 switch (msg->message_id) {
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003226 case MSG_SET_SESSIONDESCRIPTION_SUCCESS: {
3227 SetSessionDescriptionMsg* param =
3228 static_cast<SetSessionDescriptionMsg*>(msg->pdata);
3229 param->observer->OnSuccess();
3230 delete param;
3231 break;
3232 }
3233 case MSG_SET_SESSIONDESCRIPTION_FAILED: {
3234 SetSessionDescriptionMsg* param =
3235 static_cast<SetSessionDescriptionMsg*>(msg->pdata);
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003236 param->observer->OnFailure(std::move(param->error));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003237 delete param;
3238 break;
3239 }
deadbeefab9b2d12015-10-14 11:33:11 -07003240 case MSG_CREATE_SESSIONDESCRIPTION_FAILED: {
3241 CreateSessionDescriptionMsg* param =
3242 static_cast<CreateSessionDescriptionMsg*>(msg->pdata);
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003243 param->observer->OnFailure(std::move(param->error));
deadbeefab9b2d12015-10-14 11:33:11 -07003244 delete param;
3245 break;
3246 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003247 case MSG_GETSTATS: {
3248 GetStatsMsg* param = static_cast<GetStatsMsg*>(msg->pdata);
nissee8abe3e2017-01-18 05:00:34 -08003249 StatsReports reports;
3250 stats_->GetStats(param->track, &reports);
3251 param->observer->OnComplete(reports);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003252 delete param;
3253 break;
3254 }
deadbeefbd292462015-12-14 18:15:29 -08003255 case MSG_FREE_DATACHANNELS: {
3256 sctp_data_channels_to_free_.clear();
3257 break;
3258 }
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003259 default:
nisseeb4ca4e2017-01-12 02:24:27 -08003260 RTC_NOTREACHED() << "Not implemented";
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003261 break;
3262 }
3263}
3264
Steve Antonafb0bb72018-02-20 11:35:37 -08003265cricket::VoiceMediaChannel* PeerConnection::voice_media_channel() const {
3266 RTC_DCHECK(!IsUnifiedPlan());
3267 auto* voice_channel = static_cast<cricket::VoiceChannel*>(
3268 GetAudioTransceiver()->internal()->channel());
3269 if (voice_channel) {
3270 return voice_channel->media_channel();
3271 } else {
3272 return nullptr;
3273 }
3274}
3275
3276cricket::VideoMediaChannel* PeerConnection::video_media_channel() const {
3277 RTC_DCHECK(!IsUnifiedPlan());
3278 auto* video_channel = static_cast<cricket::VideoChannel*>(
3279 GetVideoTransceiver()->internal()->channel());
3280 if (video_channel) {
3281 return video_channel->media_channel();
3282 } else {
3283 return nullptr;
3284 }
3285}
3286
Steve Anton4171afb2017-11-20 10:20:22 -08003287void PeerConnection::CreateAudioReceiver(
3288 MediaStreamInterface* stream,
3289 const RtpSenderInfo& remote_sender_info) {
Henrik Boström9e6fd2b2017-11-21 13:41:51 +01003290 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams;
3291 streams.push_back(rtc::scoped_refptr<MediaStreamInterface>(stream));
Steve Antond3679212018-01-17 17:41:02 -08003292 auto* audio_receiver = new AudioRtpReceiver(
3293 worker_thread(), remote_sender_info.sender_id, streams);
Steve Anton57858b32018-02-15 15:19:50 -08003294 audio_receiver->SetVoiceMediaChannel(voice_media_channel());
Steve Antond3679212018-01-17 17:41:02 -08003295 audio_receiver->SetupMediaChannel(remote_sender_info.first_ssrc);
3296 auto receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
3297 signaling_thread(), audio_receiver);
Steve Anton4171afb2017-11-20 10:20:22 -08003298 GetAudioTransceiver()->internal()->AddReceiver(receiver);
Henrik Boström9e6fd2b2017-11-21 13:41:51 +01003299 observer_->OnAddTrack(receiver, std::move(streams));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003300}
3301
Steve Anton4171afb2017-11-20 10:20:22 -08003302void PeerConnection::CreateVideoReceiver(
3303 MediaStreamInterface* stream,
3304 const RtpSenderInfo& remote_sender_info) {
Henrik Boström9e6fd2b2017-11-21 13:41:51 +01003305 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams;
3306 streams.push_back(rtc::scoped_refptr<MediaStreamInterface>(stream));
Steve Antond3679212018-01-17 17:41:02 -08003307 auto* video_receiver = new VideoRtpReceiver(
3308 worker_thread(), remote_sender_info.sender_id, streams);
Steve Anton57858b32018-02-15 15:19:50 -08003309 video_receiver->SetVideoMediaChannel(video_media_channel());
Steve Antond3679212018-01-17 17:41:02 -08003310 video_receiver->SetupMediaChannel(remote_sender_info.first_ssrc);
3311 auto receiver = RtpReceiverProxyWithInternal<RtpReceiverInternal>::Create(
3312 signaling_thread(), video_receiver);
Steve Anton4171afb2017-11-20 10:20:22 -08003313 GetVideoTransceiver()->internal()->AddReceiver(receiver);
Henrik Boström9e6fd2b2017-11-21 13:41:51 +01003314 observer_->OnAddTrack(receiver, std::move(streams));
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003315}
3316
deadbeef70ab1a12015-09-28 16:53:55 -07003317// TODO(deadbeef): Keep RtpReceivers around even if track goes away in remote
3318// description.
Henrik Boström933d8b02017-10-10 10:05:16 -07003319rtc::scoped_refptr<RtpReceiverInterface> PeerConnection::RemoveAndStopReceiver(
Steve Anton4171afb2017-11-20 10:20:22 -08003320 const RtpSenderInfo& remote_sender_info) {
3321 auto receiver = FindReceiverById(remote_sender_info.sender_id);
3322 if (!receiver) {
3323 RTC_LOG(LS_WARNING) << "RtpReceiver for track with id "
3324 << remote_sender_info.sender_id << " doesn't exist.";
Henrik Boström933d8b02017-10-10 10:05:16 -07003325 return nullptr;
deadbeef70ab1a12015-09-28 16:53:55 -07003326 }
Steve Anton4171afb2017-11-20 10:20:22 -08003327 if (receiver->media_type() == cricket::MEDIA_TYPE_AUDIO) {
3328 GetAudioTransceiver()->internal()->RemoveReceiver(receiver);
3329 } else {
3330 GetVideoTransceiver()->internal()->RemoveReceiver(receiver);
3331 }
Henrik Boström933d8b02017-10-10 10:05:16 -07003332 return receiver;
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003333}
3334
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003335void PeerConnection::AddAudioTrack(AudioTrackInterface* track,
3336 MediaStreamInterface* stream) {
3337 RTC_DCHECK(!IsClosed());
3338 auto sender = FindSenderForTrack(track);
Steve Anton4171afb2017-11-20 10:20:22 -08003339 if (sender) {
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003340 // We already have a sender for this track, so just change the stream_id
3341 // so that it's correct in the next call to CreateOffer.
Seth Hampson5b4f0752018-04-02 16:31:36 -07003342 sender->internal()->set_stream_ids({stream->id()});
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003343 return;
3344 }
3345
3346 // Normal case; we've never seen this track before.
Steve Anton02ee47c2018-01-10 16:26:06 -08003347 auto new_sender =
Seth Hampson13b8bad2018-03-13 16:05:28 -07003348 CreateSender(cricket::MEDIA_TYPE_AUDIO, track, {stream->id()});
Steve Anton57858b32018-02-15 15:19:50 -08003349 new_sender->internal()->SetVoiceMediaChannel(voice_media_channel());
Steve Anton4171afb2017-11-20 10:20:22 -08003350 GetAudioTransceiver()->internal()->AddSender(new_sender);
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003351 // If the sender has already been configured in SDP, we call SetSsrc,
3352 // which will connect the sender to the underlying transport. This can
3353 // occur if a local session description that contains the ID of the sender
3354 // is set before AddStream is called. It can also occur if the local
3355 // session description is not changed and RemoveStream is called, and
3356 // later AddStream is called again with the same stream.
Steve Anton4171afb2017-11-20 10:20:22 -08003357 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00003358 FindSenderInfo(local_audio_sender_infos_, stream->id(), track->id());
Steve Anton4171afb2017-11-20 10:20:22 -08003359 if (sender_info) {
3360 new_sender->internal()->SetSsrc(sender_info->first_ssrc);
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003361 }
3362}
3363
3364// TODO(deadbeef): Don't destroy RtpSenders here; they should be kept around
3365// indefinitely, when we have unified plan SDP.
3366void PeerConnection::RemoveAudioTrack(AudioTrackInterface* track,
3367 MediaStreamInterface* stream) {
3368 RTC_DCHECK(!IsClosed());
3369 auto sender = FindSenderForTrack(track);
Steve Anton4171afb2017-11-20 10:20:22 -08003370 if (!sender) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01003371 RTC_LOG(LS_WARNING) << "RtpSender for track with id " << track->id()
3372 << " doesn't exist.";
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003373 return;
3374 }
Steve Anton4171afb2017-11-20 10:20:22 -08003375 GetAudioTransceiver()->internal()->RemoveSender(sender);
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003376}
3377
3378void PeerConnection::AddVideoTrack(VideoTrackInterface* track,
3379 MediaStreamInterface* stream) {
3380 RTC_DCHECK(!IsClosed());
3381 auto sender = FindSenderForTrack(track);
Steve Anton4171afb2017-11-20 10:20:22 -08003382 if (sender) {
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003383 // We already have a sender for this track, so just change the stream_id
3384 // so that it's correct in the next call to CreateOffer.
Seth Hampson5b4f0752018-04-02 16:31:36 -07003385 sender->internal()->set_stream_ids({stream->id()});
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003386 return;
3387 }
3388
3389 // Normal case; we've never seen this track before.
Steve Anton02ee47c2018-01-10 16:26:06 -08003390 auto new_sender =
Seth Hampson13b8bad2018-03-13 16:05:28 -07003391 CreateSender(cricket::MEDIA_TYPE_VIDEO, track, {stream->id()});
Steve Anton57858b32018-02-15 15:19:50 -08003392 new_sender->internal()->SetVideoMediaChannel(video_media_channel());
Steve Anton4171afb2017-11-20 10:20:22 -08003393 GetVideoTransceiver()->internal()->AddSender(new_sender);
3394 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00003395 FindSenderInfo(local_video_sender_infos_, stream->id(), track->id());
Steve Anton4171afb2017-11-20 10:20:22 -08003396 if (sender_info) {
3397 new_sender->internal()->SetSsrc(sender_info->first_ssrc);
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003398 }
3399}
3400
3401void PeerConnection::RemoveVideoTrack(VideoTrackInterface* track,
3402 MediaStreamInterface* stream) {
3403 RTC_DCHECK(!IsClosed());
3404 auto sender = FindSenderForTrack(track);
Steve Anton4171afb2017-11-20 10:20:22 -08003405 if (!sender) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01003406 RTC_LOG(LS_WARNING) << "RtpSender for track with id " << track->id()
3407 << " doesn't exist.";
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003408 return;
3409 }
Steve Anton4171afb2017-11-20 10:20:22 -08003410 GetVideoTransceiver()->internal()->RemoveSender(sender);
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003411}
3412
Steve Antonba818672017-11-06 10:21:57 -08003413void PeerConnection::SetIceConnectionState(IceConnectionState new_state) {
deadbeef0a6c4ca2015-10-06 11:38:28 -07003414 RTC_DCHECK(signaling_thread()->IsCurrent());
Steve Antonba818672017-11-06 10:21:57 -08003415 if (ice_connection_state_ == new_state) {
3416 return;
3417 }
3418
deadbeefcbecd352015-09-23 11:50:27 -07003419 // After transitioning to "closed", ignore any additional states from
Steve Antonba818672017-11-06 10:21:57 -08003420 // TransportController (such as "disconnected").
deadbeefab9b2d12015-10-14 11:33:11 -07003421 if (IsClosed()) {
deadbeefcbecd352015-09-23 11:50:27 -07003422 return;
3423 }
Steve Antonba818672017-11-06 10:21:57 -08003424
Mirko Bonadei675513b2017-11-09 11:09:25 +01003425 RTC_LOG(LS_INFO) << "Changing IceConnectionState " << ice_connection_state_
3426 << " => " << new_state;
Steve Antonba818672017-11-06 10:21:57 -08003427 RTC_DCHECK(ice_connection_state_ !=
3428 PeerConnectionInterface::kIceConnectionClosed);
3429
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003430 ice_connection_state_ = new_state;
mallinath@webrtc.orgd3dc4242014-03-01 00:05:52 +00003431 observer_->OnIceConnectionChange(ice_connection_state_);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003432}
3433
3434void PeerConnection::OnIceGatheringChange(
3435 PeerConnectionInterface::IceGatheringState new_state) {
deadbeef0a6c4ca2015-10-06 11:38:28 -07003436 RTC_DCHECK(signaling_thread()->IsCurrent());
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003437 if (IsClosed()) {
3438 return;
3439 }
3440 ice_gathering_state_ = new_state;
mallinath@webrtc.orgd3dc4242014-03-01 00:05:52 +00003441 observer_->OnIceGatheringChange(ice_gathering_state_);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003442}
3443
jbauch81bf7b02017-03-25 08:31:12 -07003444void PeerConnection::OnIceCandidate(
3445 std::unique_ptr<IceCandidateInterface> candidate) {
deadbeef0a6c4ca2015-10-06 11:38:28 -07003446 RTC_DCHECK(signaling_thread()->IsCurrent());
zhihuang29ff8442016-07-27 11:07:25 -07003447 if (IsClosed()) {
3448 return;
3449 }
jbauch81bf7b02017-03-25 08:31:12 -07003450 observer_->OnIceCandidate(candidate.get());
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003451}
3452
Honghai Zhang7fb69db2016-03-14 11:59:18 -07003453void PeerConnection::OnIceCandidatesRemoved(
3454 const std::vector<cricket::Candidate>& candidates) {
3455 RTC_DCHECK(signaling_thread()->IsCurrent());
zhihuang29ff8442016-07-27 11:07:25 -07003456 if (IsClosed()) {
3457 return;
3458 }
Honghai Zhang7fb69db2016-03-14 11:59:18 -07003459 observer_->OnIceCandidatesRemoved(candidates);
3460}
3461
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003462void PeerConnection::ChangeSignalingState(
3463 PeerConnectionInterface::SignalingState signaling_state) {
Steve Antonba818672017-11-06 10:21:57 -08003464 RTC_DCHECK(signaling_thread()->IsCurrent());
3465 if (signaling_state_ == signaling_state) {
3466 return;
3467 }
Mirko Bonadei675513b2017-11-09 11:09:25 +01003468 RTC_LOG(LS_INFO) << "Session: " << session_id() << " Old state: "
3469 << GetSignalingStateString(signaling_state_)
3470 << " New state: "
3471 << GetSignalingStateString(signaling_state);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003472 signaling_state_ = signaling_state;
3473 if (signaling_state == kClosed) {
3474 ice_connection_state_ = kIceConnectionClosed;
3475 observer_->OnIceConnectionChange(ice_connection_state_);
3476 if (ice_gathering_state_ != kIceGatheringComplete) {
3477 ice_gathering_state_ = kIceGatheringComplete;
3478 observer_->OnIceGatheringChange(ice_gathering_state_);
3479 }
3480 }
3481 observer_->OnSignalingChange(signaling_state_);
henrike@webrtc.org28e20752013-07-10 00:45:36 +00003482}
3483
deadbeefeb459812015-12-15 19:24:43 -08003484void PeerConnection::OnAudioTrackAdded(AudioTrackInterface* track,
3485 MediaStreamInterface* stream) {
zhihuang29ff8442016-07-27 11:07:25 -07003486 if (IsClosed()) {
3487 return;
3488 }
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003489 AddAudioTrack(track, stream);
3490 observer_->OnRenegotiationNeeded();
deadbeefeb459812015-12-15 19:24:43 -08003491}
3492
deadbeefeb459812015-12-15 19:24:43 -08003493void PeerConnection::OnAudioTrackRemoved(AudioTrackInterface* track,
3494 MediaStreamInterface* stream) {
zhihuang29ff8442016-07-27 11:07:25 -07003495 if (IsClosed()) {
3496 return;
3497 }
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003498 RemoveAudioTrack(track, stream);
3499 observer_->OnRenegotiationNeeded();
deadbeefeb459812015-12-15 19:24:43 -08003500}
3501
3502void PeerConnection::OnVideoTrackAdded(VideoTrackInterface* track,
3503 MediaStreamInterface* stream) {
zhihuang29ff8442016-07-27 11:07:25 -07003504 if (IsClosed()) {
3505 return;
3506 }
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003507 AddVideoTrack(track, stream);
3508 observer_->OnRenegotiationNeeded();
deadbeefeb459812015-12-15 19:24:43 -08003509}
3510
3511void PeerConnection::OnVideoTrackRemoved(VideoTrackInterface* track,
3512 MediaStreamInterface* stream) {
zhihuang29ff8442016-07-27 11:07:25 -07003513 if (IsClosed()) {
3514 return;
3515 }
korniltsev.anatolyec390b52017-07-24 17:00:25 -07003516 RemoveVideoTrack(track, stream);
3517 observer_->OnRenegotiationNeeded();
deadbeefeb459812015-12-15 19:24:43 -08003518}
3519
Henrik Boström31638672017-11-23 17:48:32 +01003520void PeerConnection::PostSetSessionDescriptionSuccess(
3521 SetSessionDescriptionObserver* observer) {
3522 SetSessionDescriptionMsg* msg = new SetSessionDescriptionMsg(observer);
3523 signaling_thread()->Post(RTC_FROM_HERE, this,
3524 MSG_SET_SESSIONDESCRIPTION_SUCCESS, msg);
3525}
3526
deadbeefab9b2d12015-10-14 11:33:11 -07003527void PeerConnection::PostSetSessionDescriptionFailure(
3528 SetSessionDescriptionObserver* observer,
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003529 RTCError&& error) {
3530 RTC_DCHECK(!error.ok());
deadbeefab9b2d12015-10-14 11:33:11 -07003531 SetSessionDescriptionMsg* msg = new SetSessionDescriptionMsg(observer);
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003532 msg->error = std::move(error);
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -07003533 signaling_thread()->Post(RTC_FROM_HERE, this,
3534 MSG_SET_SESSIONDESCRIPTION_FAILED, msg);
deadbeefab9b2d12015-10-14 11:33:11 -07003535}
3536
3537void PeerConnection::PostCreateSessionDescriptionFailure(
3538 CreateSessionDescriptionObserver* observer,
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003539 RTCError error) {
3540 RTC_DCHECK(!error.ok());
deadbeefab9b2d12015-10-14 11:33:11 -07003541 CreateSessionDescriptionMsg* msg = new CreateSessionDescriptionMsg(observer);
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01003542 msg->error = std::move(error);
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -07003543 signaling_thread()->Post(RTC_FROM_HERE, this,
3544 MSG_CREATE_SESSIONDESCRIPTION_FAILED, msg);
deadbeefab9b2d12015-10-14 11:33:11 -07003545}
3546
zhihuang1c378ed2017-08-17 14:10:50 -07003547void PeerConnection::GetOptionsForOffer(
Steve Antondcc3c022017-12-22 16:02:54 -08003548 const PeerConnectionInterface::RTCOfferAnswerOptions& offer_answer_options,
deadbeefab9b2d12015-10-14 11:33:11 -07003549 cricket::MediaSessionOptions* session_options) {
Steve Antondcc3c022017-12-22 16:02:54 -08003550 ExtractSharedMediaSessionOptions(offer_answer_options, session_options);
zhihuang1c378ed2017-08-17 14:10:50 -07003551
Steve Antondcc3c022017-12-22 16:02:54 -08003552 if (IsUnifiedPlan()) {
3553 GetOptionsForUnifiedPlanOffer(offer_answer_options, session_options);
3554 } else {
3555 GetOptionsForPlanBOffer(offer_answer_options, session_options);
3556 }
3557
Steve Antonfa2260d2017-12-28 16:38:23 -08003558 // Intentionally unset the data channel type for RTP data channel with the
3559 // second condition. Otherwise the RTP data channels would be successfully
3560 // negotiated by default and the unit tests in WebRtcDataBrowserTest will fail
3561 // when building with chromium. We want to leave RTP data channels broken, so
3562 // people won't try to use them.
3563 if (!rtp_data_channels_.empty() || data_channel_type() != cricket::DCT_RTP) {
3564 session_options->data_channel_type = data_channel_type();
3565 }
3566
Steve Antondcc3c022017-12-22 16:02:54 -08003567 // Apply ICE restart flag and renomination flag.
3568 for (auto& options : session_options->media_description_options) {
3569 options.transport_options.ice_restart = offer_answer_options.ice_restart;
3570 options.transport_options.enable_ice_renomination =
3571 configuration_.enable_ice_renomination;
3572 }
3573
3574 session_options->rtcp_cname = rtcp_cname_;
3575 session_options->crypto_options = factory_->options().crypto_options;
Steve Antone831b8c2018-02-01 12:22:16 -08003576 session_options->is_unified_plan = IsUnifiedPlan();
Steve Antondcc3c022017-12-22 16:02:54 -08003577}
3578
3579void PeerConnection::GetOptionsForPlanBOffer(
3580 const PeerConnectionInterface::RTCOfferAnswerOptions& offer_answer_options,
3581 cricket::MediaSessionOptions* session_options) {
zhihuang1c378ed2017-08-17 14:10:50 -07003582 // Figure out transceiver directional preferences.
3583 bool send_audio = HasRtpSender(cricket::MEDIA_TYPE_AUDIO);
3584 bool send_video = HasRtpSender(cricket::MEDIA_TYPE_VIDEO);
3585
3586 // By default, generate sendrecv/recvonly m= sections.
3587 bool recv_audio = true;
3588 bool recv_video = true;
3589
3590 // By default, only offer a new m= section if we have media to send with it.
3591 bool offer_new_audio_description = send_audio;
3592 bool offer_new_video_description = send_video;
3593 bool offer_new_data_description = HasDataChannels();
3594
3595 // The "offer_to_receive_X" options allow those defaults to be overridden.
Steve Antondcc3c022017-12-22 16:02:54 -08003596 if (offer_answer_options.offer_to_receive_audio !=
3597 RTCOfferAnswerOptions::kUndefined) {
3598 recv_audio = (offer_answer_options.offer_to_receive_audio > 0);
zhihuang1c378ed2017-08-17 14:10:50 -07003599 offer_new_audio_description =
Steve Antondcc3c022017-12-22 16:02:54 -08003600 offer_new_audio_description ||
3601 (offer_answer_options.offer_to_receive_audio > 0);
zhihuang1c378ed2017-08-17 14:10:50 -07003602 }
Steve Antondcc3c022017-12-22 16:02:54 -08003603 if (offer_answer_options.offer_to_receive_video !=
3604 RTCOfferAnswerOptions::kUndefined) {
3605 recv_video = (offer_answer_options.offer_to_receive_video > 0);
zhihuang1c378ed2017-08-17 14:10:50 -07003606 offer_new_video_description =
Steve Antondcc3c022017-12-22 16:02:54 -08003607 offer_new_video_description ||
3608 (offer_answer_options.offer_to_receive_video > 0);
zhihuang1c378ed2017-08-17 14:10:50 -07003609 }
3610
3611 rtc::Optional<size_t> audio_index;
3612 rtc::Optional<size_t> video_index;
3613 rtc::Optional<size_t> data_index;
3614 // If a current description exists, generate m= sections in the same order,
3615 // using the first audio/video/data section that appears and rejecting
3616 // extraneous ones.
Steve Anton75737c02017-11-06 10:37:17 -08003617 if (local_description()) {
zhihuang1c378ed2017-08-17 14:10:50 -07003618 GenerateMediaDescriptionOptions(
Steve Anton75737c02017-11-06 10:37:17 -08003619 local_description(),
Steve Anton1d03a752017-11-27 14:30:09 -08003620 RtpTransceiverDirectionFromSendRecv(send_audio, recv_audio),
3621 RtpTransceiverDirectionFromSendRecv(send_video, recv_video),
3622 &audio_index, &video_index, &data_index, session_options);
deadbeefab9b2d12015-10-14 11:33:11 -07003623 }
3624
zhihuang1c378ed2017-08-17 14:10:50 -07003625 // Add audio/video/data m= sections to the end if needed.
3626 if (!audio_index && offer_new_audio_description) {
3627 session_options->media_description_options.push_back(
3628 cricket::MediaDescriptionOptions(
3629 cricket::MEDIA_TYPE_AUDIO, cricket::CN_AUDIO,
Steve Anton1d03a752017-11-27 14:30:09 -08003630 RtpTransceiverDirectionFromSendRecv(send_audio, recv_audio),
3631 false));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003632 audio_index = session_options->media_description_options.size() - 1;
deadbeefc80741f2015-10-22 13:14:45 -07003633 }
zhihuang1c378ed2017-08-17 14:10:50 -07003634 if (!video_index && offer_new_video_description) {
3635 session_options->media_description_options.push_back(
3636 cricket::MediaDescriptionOptions(
3637 cricket::MEDIA_TYPE_VIDEO, cricket::CN_VIDEO,
Steve Anton1d03a752017-11-27 14:30:09 -08003638 RtpTransceiverDirectionFromSendRecv(send_video, recv_video),
3639 false));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003640 video_index = session_options->media_description_options.size() - 1;
deadbeefc80741f2015-10-22 13:14:45 -07003641 }
zhihuang1c378ed2017-08-17 14:10:50 -07003642 if (!data_index && offer_new_data_description) {
3643 session_options->media_description_options.push_back(
Steve Antonfa2260d2017-12-28 16:38:23 -08003644 GetMediaDescriptionOptionsForActiveData(cricket::CN_DATA));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003645 data_index = session_options->media_description_options.size() - 1;
zhihuang1c378ed2017-08-17 14:10:50 -07003646 }
3647
3648 cricket::MediaDescriptionOptions* audio_media_description_options =
3649 !audio_index ? nullptr
3650 : &session_options->media_description_options[*audio_index];
3651 cricket::MediaDescriptionOptions* video_media_description_options =
3652 !video_index ? nullptr
3653 : &session_options->media_description_options[*video_index];
zhihuang1c378ed2017-08-17 14:10:50 -07003654
Steve Anton4171afb2017-11-20 10:20:22 -08003655 AddRtpSenderOptions(GetSendersInternal(), audio_media_description_options,
zhihuang1c378ed2017-08-17 14:10:50 -07003656 video_media_description_options);
Steve Antondcc3c022017-12-22 16:02:54 -08003657}
3658
3659// Find a new MID that is not already in |used_mids|, then add it to |used_mids|
3660// and return a reference to it.
3661// Generated MIDs should be no more than 3 bytes long to take up less space in
3662// the RTP packet.
3663static const std::string& AllocateMid(std::set<std::string>* used_mids) {
3664 RTC_DCHECK(used_mids);
3665 // We're boring: just generate MIDs 0, 1, 2, ...
3666 size_t i = 0;
3667 std::set<std::string>::iterator it;
3668 bool inserted;
3669 do {
3670 std::string mid = rtc::ToString(i++);
3671 auto insert_result = used_mids->insert(mid);
3672 it = insert_result.first;
3673 inserted = insert_result.second;
3674 } while (!inserted);
3675 return *it;
3676}
3677
3678static cricket::MediaDescriptionOptions
3679GetMediaDescriptionOptionsForTransceiver(
3680 rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
3681 transceiver,
3682 const std::string& mid) {
3683 cricket::MediaDescriptionOptions media_description_options(
Steve Anton69470252018-02-09 11:43:08 -08003684 transceiver->media_type(), mid, transceiver->direction(),
Steve Antondcc3c022017-12-22 16:02:54 -08003685 transceiver->stopped());
Steve Anton5f94aa22018-02-01 10:58:30 -08003686 // This behavior is specified in JSEP. The gist is that:
3687 // 1. The MSID is included if the RtpTransceiver's direction is sendonly or
3688 // sendrecv.
3689 // 2. If the MSID is included, then it must be included in any subsequent
3690 // offer/answer exactly the same until the RtpTransceiver is stopped.
3691 if (!transceiver->stopped() &&
3692 (RtpTransceiverDirectionHasSend(transceiver->direction()) ||
3693 transceiver->internal()->has_ever_been_used_to_send())) {
3694 cricket::SenderOptions sender_options;
3695 sender_options.track_id = transceiver->sender()->id();
3696 sender_options.stream_ids = transceiver->sender()->stream_ids();
3697 // TODO(bugs.webrtc.org/7600): Set num_sim_layers to the number of encodings
3698 // set in the RTP parameters when the transceiver was added.
3699 sender_options.num_sim_layers = 1;
3700 media_description_options.sender_options.push_back(sender_options);
3701 }
Steve Antondcc3c022017-12-22 16:02:54 -08003702 return media_description_options;
3703}
3704
3705void PeerConnection::GetOptionsForUnifiedPlanOffer(
3706 const RTCOfferAnswerOptions& offer_answer_options,
3707 cricket::MediaSessionOptions* session_options) {
3708 // Rules for generating an offer are dictated by JSEP sections 5.2.1 (Initial
3709 // Offers) and 5.2.2 (Subsequent Offers).
3710 RTC_DCHECK_EQ(session_options->media_description_options.size(), 0);
3711 const ContentInfos& local_contents =
3712 (local_description() ? local_description()->description()->contents()
3713 : ContentInfos());
3714 const ContentInfos& remote_contents =
3715 (remote_description() ? remote_description()->description()->contents()
3716 : ContentInfos());
3717 // The mline indices that can be recycled. New transceivers should reuse these
3718 // slots first.
3719 std::queue<size_t> recycleable_mline_indices;
3720 // Track the MIDs used in previous offer/answer exchanges and the current
3721 // offer so that new, unique MIDs are generated.
3722 std::set<std::string> used_mids = seen_mids_;
3723 // First, go through each media section that exists in either the local or
3724 // remote description and generate a media section in this offer for the
3725 // associated transceiver. If a media section can be recycled, generate a
3726 // default, rejected media section here that can be later overwritten.
3727 for (size_t i = 0;
3728 i < std::max(local_contents.size(), remote_contents.size()); ++i) {
3729 // Either |local_content| or |remote_content| is non-null.
3730 const ContentInfo* local_content =
3731 (i < local_contents.size() ? &local_contents[i] : nullptr);
3732 const ContentInfo* remote_content =
3733 (i < remote_contents.size() ? &remote_contents[i] : nullptr);
3734 bool had_been_rejected = (local_content && local_content->rejected) ||
3735 (remote_content && remote_content->rejected);
3736 const std::string& mid =
3737 (local_content ? local_content->name : remote_content->name);
3738 cricket::MediaType media_type =
3739 (local_content ? local_content->media_description()->type()
3740 : remote_content->media_description()->type());
3741 if (media_type == cricket::MEDIA_TYPE_AUDIO ||
3742 media_type == cricket::MEDIA_TYPE_VIDEO) {
3743 auto transceiver = GetAssociatedTransceiver(mid);
3744 RTC_CHECK(transceiver);
3745 // A media section is considered eligible for recycling if it is marked as
3746 // rejected in either the local or remote description.
Seth Hampsonae8a90a2018-02-13 15:33:48 -08003747 if (had_been_rejected && transceiver->stopped()) {
Steve Antondcc3c022017-12-22 16:02:54 -08003748 session_options->media_description_options.push_back(
Steve Anton69470252018-02-09 11:43:08 -08003749 cricket::MediaDescriptionOptions(transceiver->media_type(), mid,
3750 RtpTransceiverDirection::kInactive,
3751 /*stopped=*/true));
Steve Antondcc3c022017-12-22 16:02:54 -08003752 recycleable_mline_indices.push(i);
3753 } else {
3754 session_options->media_description_options.push_back(
3755 GetMediaDescriptionOptionsForTransceiver(transceiver, mid));
3756 // CreateOffer shouldn't really cause any state changes in
3757 // PeerConnection, but we need a way to match new transceivers to new
3758 // media sections in SetLocalDescription and JSEP specifies this is done
3759 // by recording the index of the media section generated for the
3760 // transceiver in the offer.
3761 transceiver->internal()->set_mline_index(i);
3762 }
3763 } else {
3764 RTC_CHECK_EQ(cricket::MEDIA_TYPE_DATA, media_type);
Steve Antonfa2260d2017-12-28 16:38:23 -08003765 RTC_CHECK(GetDataMid());
3766 if (had_been_rejected || mid != *GetDataMid()) {
3767 session_options->media_description_options.push_back(
3768 GetMediaDescriptionOptionsForRejectedData(mid));
3769 } else {
3770 session_options->media_description_options.push_back(
3771 GetMediaDescriptionOptionsForActiveData(mid));
3772 }
Steve Antondcc3c022017-12-22 16:02:54 -08003773 }
3774 }
3775 // Next, look for transceivers that are newly added (that is, are not stopped
3776 // and not associated). Reuse media sections marked as recyclable first,
3777 // otherwise append to the end of the offer. New media sections should be
3778 // added in the order they were added to the PeerConnection.
3779 for (auto transceiver : transceivers_) {
3780 if (transceiver->mid() || transceiver->stopped()) {
3781 continue;
3782 }
3783 size_t mline_index;
3784 if (!recycleable_mline_indices.empty()) {
3785 mline_index = recycleable_mline_indices.front();
3786 recycleable_mline_indices.pop();
3787 session_options->media_description_options[mline_index] =
3788 GetMediaDescriptionOptionsForTransceiver(transceiver,
3789 AllocateMid(&used_mids));
3790 } else {
3791 mline_index = session_options->media_description_options.size();
3792 session_options->media_description_options.push_back(
3793 GetMediaDescriptionOptionsForTransceiver(transceiver,
3794 AllocateMid(&used_mids)));
3795 }
3796 // See comment above for why CreateOffer changes the transceiver's state.
3797 transceiver->internal()->set_mline_index(mline_index);
3798 }
Steve Antonfa2260d2017-12-28 16:38:23 -08003799 // Lastly, add a m-section if we have local data channels and an m section
3800 // does not already exist.
3801 if (!GetDataMid() && HasDataChannels()) {
3802 session_options->media_description_options.push_back(
3803 GetMediaDescriptionOptionsForActiveData(AllocateMid(&used_mids)));
3804 }
Steve Antondcc3c022017-12-22 16:02:54 -08003805}
3806
3807void PeerConnection::GetOptionsForAnswer(
3808 const RTCOfferAnswerOptions& offer_answer_options,
3809 cricket::MediaSessionOptions* session_options) {
3810 ExtractSharedMediaSessionOptions(offer_answer_options, session_options);
3811
3812 if (IsUnifiedPlan()) {
3813 GetOptionsForUnifiedPlanAnswer(offer_answer_options, session_options);
3814 } else {
3815 GetOptionsForPlanBAnswer(offer_answer_options, session_options);
3816 }
3817
Steve Antonfa2260d2017-12-28 16:38:23 -08003818 // Intentionally unset the data channel type for RTP data channel. Otherwise
3819 // the RTP data channels would be successfully negotiated by default and the
3820 // unit tests in WebRtcDataBrowserTest will fail when building with chromium.
3821 // We want to leave RTP data channels broken, so people won't try to use them.
3822 if (!rtp_data_channels_.empty() || data_channel_type() != cricket::DCT_RTP) {
3823 session_options->data_channel_type = data_channel_type();
3824 }
3825
Steve Antondcc3c022017-12-22 16:02:54 -08003826 // Apply ICE renomination flag.
3827 for (auto& options : session_options->media_description_options) {
3828 options.transport_options.enable_ice_renomination =
3829 configuration_.enable_ice_renomination;
3830 }
zhihuang8f65cdf2016-05-06 18:40:30 -07003831
3832 session_options->rtcp_cname = rtcp_cname_;
jbauchcb560652016-08-04 05:20:32 -07003833 session_options->crypto_options = factory_->options().crypto_options;
Steve Antone831b8c2018-02-01 12:22:16 -08003834 session_options->is_unified_plan = IsUnifiedPlan();
deadbeefab9b2d12015-10-14 11:33:11 -07003835}
3836
Steve Antondcc3c022017-12-22 16:02:54 -08003837void PeerConnection::GetOptionsForPlanBAnswer(
3838 const PeerConnectionInterface::RTCOfferAnswerOptions& offer_answer_options,
Honghai Zhang4cedf2b2016-08-31 08:18:11 -07003839 cricket::MediaSessionOptions* session_options) {
zhihuang1c378ed2017-08-17 14:10:50 -07003840 // Figure out transceiver directional preferences.
3841 bool send_audio = HasRtpSender(cricket::MEDIA_TYPE_AUDIO);
3842 bool send_video = HasRtpSender(cricket::MEDIA_TYPE_VIDEO);
3843
3844 // By default, generate sendrecv/recvonly m= sections. The direction is also
3845 // restricted by the direction in the offer.
3846 bool recv_audio = true;
3847 bool recv_video = true;
3848
3849 // The "offer_to_receive_X" options allow those defaults to be overridden.
Steve Antondcc3c022017-12-22 16:02:54 -08003850 if (offer_answer_options.offer_to_receive_audio !=
3851 RTCOfferAnswerOptions::kUndefined) {
3852 recv_audio = (offer_answer_options.offer_to_receive_audio > 0);
deadbeef0ed85b22016-02-23 17:24:52 -08003853 }
Steve Antondcc3c022017-12-22 16:02:54 -08003854 if (offer_answer_options.offer_to_receive_video !=
3855 RTCOfferAnswerOptions::kUndefined) {
3856 recv_video = (offer_answer_options.offer_to_receive_video > 0);
zhihuang1c378ed2017-08-17 14:10:50 -07003857 }
3858
3859 rtc::Optional<size_t> audio_index;
3860 rtc::Optional<size_t> video_index;
3861 rtc::Optional<size_t> data_index;
Steve Antondffead82018-02-06 10:31:29 -08003862
3863 // Generate m= sections that match those in the offer.
3864 // Note that mediasession.cc will handle intersection our preferred
3865 // direction with the offered direction.
3866 GenerateMediaDescriptionOptions(
3867 remote_description(),
3868 RtpTransceiverDirectionFromSendRecv(send_audio, recv_audio),
3869 RtpTransceiverDirectionFromSendRecv(send_video, recv_video), &audio_index,
3870 &video_index, &data_index, session_options);
zhihuang1c378ed2017-08-17 14:10:50 -07003871
3872 cricket::MediaDescriptionOptions* audio_media_description_options =
3873 !audio_index ? nullptr
3874 : &session_options->media_description_options[*audio_index];
3875 cricket::MediaDescriptionOptions* video_media_description_options =
3876 !video_index ? nullptr
3877 : &session_options->media_description_options[*video_index];
zhihuang1c378ed2017-08-17 14:10:50 -07003878
Steve Anton4171afb2017-11-20 10:20:22 -08003879 AddRtpSenderOptions(GetSendersInternal(), audio_media_description_options,
zhihuang1c378ed2017-08-17 14:10:50 -07003880 video_media_description_options);
Steve Antondcc3c022017-12-22 16:02:54 -08003881}
zhihuangaf388472016-11-02 16:49:48 -07003882
Steve Antondcc3c022017-12-22 16:02:54 -08003883void PeerConnection::GetOptionsForUnifiedPlanAnswer(
3884 const PeerConnectionInterface::RTCOfferAnswerOptions& offer_answer_options,
3885 cricket::MediaSessionOptions* session_options) {
3886 // Rules for generating an answer are dictated by JSEP sections 5.3.1 (Initial
3887 // Answers) and 5.3.2 (Subsequent Answers).
3888 RTC_DCHECK(remote_description());
3889 RTC_DCHECK(remote_description()->GetType() == SdpType::kOffer);
3890 for (const ContentInfo& content :
3891 remote_description()->description()->contents()) {
3892 cricket::MediaType media_type = content.media_description()->type();
3893 if (media_type == cricket::MEDIA_TYPE_AUDIO ||
3894 media_type == cricket::MEDIA_TYPE_VIDEO) {
3895 auto transceiver = GetAssociatedTransceiver(content.name);
3896 RTC_CHECK(transceiver);
3897 session_options->media_description_options.push_back(
3898 GetMediaDescriptionOptionsForTransceiver(transceiver, content.name));
3899 } else {
3900 RTC_CHECK_EQ(cricket::MEDIA_TYPE_DATA, media_type);
Steve Antondbf9d032018-01-19 15:23:40 -08003901 // Reject all data sections if data channels are disabled.
3902 // Reject a data section if it has already been rejected.
3903 // Reject all data sections except for the first one.
3904 if (data_channel_type_ == cricket::DCT_NONE || content.rejected ||
3905 content.name != *GetDataMid()) {
Steve Antonfa2260d2017-12-28 16:38:23 -08003906 session_options->media_description_options.push_back(
3907 GetMediaDescriptionOptionsForRejectedData(content.name));
3908 } else {
3909 session_options->media_description_options.push_back(
3910 GetMediaDescriptionOptionsForActiveData(content.name));
3911 }
Steve Antondcc3c022017-12-22 16:02:54 -08003912 }
3913 }
htaa2a49d92016-03-04 02:51:39 -08003914}
3915
zhihuang1c378ed2017-08-17 14:10:50 -07003916void PeerConnection::GenerateMediaDescriptionOptions(
3917 const SessionDescriptionInterface* session_desc,
Steve Anton1d03a752017-11-27 14:30:09 -08003918 RtpTransceiverDirection audio_direction,
3919 RtpTransceiverDirection video_direction,
zhihuang1c378ed2017-08-17 14:10:50 -07003920 rtc::Optional<size_t>* audio_index,
3921 rtc::Optional<size_t>* video_index,
3922 rtc::Optional<size_t>* data_index,
htaa2a49d92016-03-04 02:51:39 -08003923 cricket::MediaSessionOptions* session_options) {
zhihuang1c378ed2017-08-17 14:10:50 -07003924 for (const cricket::ContentInfo& content :
3925 session_desc->description()->contents()) {
3926 if (IsAudioContent(&content)) {
3927 // If we already have an audio m= section, reject this extra one.
3928 if (*audio_index) {
3929 session_options->media_description_options.push_back(
3930 cricket::MediaDescriptionOptions(
3931 cricket::MEDIA_TYPE_AUDIO, content.name,
Steve Anton1d03a752017-11-27 14:30:09 -08003932 RtpTransceiverDirection::kInactive, true));
zhihuang1c378ed2017-08-17 14:10:50 -07003933 } else {
3934 session_options->media_description_options.push_back(
3935 cricket::MediaDescriptionOptions(
3936 cricket::MEDIA_TYPE_AUDIO, content.name, audio_direction,
Steve Anton1d03a752017-11-27 14:30:09 -08003937 audio_direction == RtpTransceiverDirection::kInactive));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003938 *audio_index = session_options->media_description_options.size() - 1;
zhihuang1c378ed2017-08-17 14:10:50 -07003939 }
3940 } else if (IsVideoContent(&content)) {
3941 // If we already have an video m= section, reject this extra one.
3942 if (*video_index) {
3943 session_options->media_description_options.push_back(
3944 cricket::MediaDescriptionOptions(
3945 cricket::MEDIA_TYPE_VIDEO, content.name,
Steve Anton1d03a752017-11-27 14:30:09 -08003946 RtpTransceiverDirection::kInactive, true));
zhihuang1c378ed2017-08-17 14:10:50 -07003947 } else {
3948 session_options->media_description_options.push_back(
3949 cricket::MediaDescriptionOptions(
3950 cricket::MEDIA_TYPE_VIDEO, content.name, video_direction,
Steve Anton1d03a752017-11-27 14:30:09 -08003951 video_direction == RtpTransceiverDirection::kInactive));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003952 *video_index = session_options->media_description_options.size() - 1;
zhihuang1c378ed2017-08-17 14:10:50 -07003953 }
3954 } else {
3955 RTC_DCHECK(IsDataContent(&content));
3956 // If we already have an data m= section, reject this extra one.
3957 if (*data_index) {
3958 session_options->media_description_options.push_back(
Steve Antonfa2260d2017-12-28 16:38:23 -08003959 GetMediaDescriptionOptionsForRejectedData(content.name));
zhihuang1c378ed2017-08-17 14:10:50 -07003960 } else {
3961 session_options->media_description_options.push_back(
Steve Antonfa2260d2017-12-28 16:38:23 -08003962 GetMediaDescriptionOptionsForActiveData(content.name));
Oskar Sundbom9b28a032017-11-16 10:53:30 +01003963 *data_index = session_options->media_description_options.size() - 1;
zhihuang1c378ed2017-08-17 14:10:50 -07003964 }
3965 }
htaa2a49d92016-03-04 02:51:39 -08003966 }
deadbeefab9b2d12015-10-14 11:33:11 -07003967}
3968
Steve Antonfa2260d2017-12-28 16:38:23 -08003969cricket::MediaDescriptionOptions
3970PeerConnection::GetMediaDescriptionOptionsForActiveData(
3971 const std::string& mid) const {
3972 // Direction for data sections is meaningless, but legacy endpoints might
3973 // expect sendrecv.
3974 cricket::MediaDescriptionOptions options(cricket::MEDIA_TYPE_DATA, mid,
3975 RtpTransceiverDirection::kSendRecv,
3976 /*stopped=*/false);
3977 AddRtpDataChannelOptions(rtp_data_channels_, &options);
3978 return options;
3979}
3980
3981cricket::MediaDescriptionOptions
3982PeerConnection::GetMediaDescriptionOptionsForRejectedData(
3983 const std::string& mid) const {
3984 cricket::MediaDescriptionOptions options(cricket::MEDIA_TYPE_DATA, mid,
3985 RtpTransceiverDirection::kInactive,
3986 /*stopped=*/true);
3987 AddRtpDataChannelOptions(rtp_data_channels_, &options);
3988 return options;
3989}
3990
3991rtc::Optional<std::string> PeerConnection::GetDataMid() const {
3992 switch (data_channel_type_) {
3993 case cricket::DCT_RTP:
3994 if (!rtp_data_channel_) {
3995 return rtc::nullopt;
3996 }
3997 return rtp_data_channel_->content_name();
3998 case cricket::DCT_SCTP:
Zhi Huange830e682018-03-30 10:48:35 -07003999 return sctp_mid_;
Steve Antonfa2260d2017-12-28 16:38:23 -08004000 default:
4001 return rtc::nullopt;
4002 }
4003}
4004
Steve Anton4171afb2017-11-20 10:20:22 -08004005void PeerConnection::RemoveSenders(cricket::MediaType media_type) {
4006 UpdateLocalSenders(std::vector<cricket::StreamParams>(), media_type);
4007 UpdateRemoteSendersList(std::vector<cricket::StreamParams>(), false,
deadbeefbda7e0b2015-12-08 17:13:40 -08004008 media_type, nullptr);
deadbeeffaac4972015-11-12 15:33:07 -08004009}
4010
Steve Anton4171afb2017-11-20 10:20:22 -08004011void PeerConnection::UpdateRemoteSendersList(
deadbeefab9b2d12015-10-14 11:33:11 -07004012 const cricket::StreamParamsVec& streams,
Steve Anton4171afb2017-11-20 10:20:22 -08004013 bool default_sender_needed,
deadbeefab9b2d12015-10-14 11:33:11 -07004014 cricket::MediaType media_type,
4015 StreamCollection* new_streams) {
Seth Hampson5b4f0752018-04-02 16:31:36 -07004016 RTC_DCHECK(!IsUnifiedPlan());
4017
Steve Anton4171afb2017-11-20 10:20:22 -08004018 std::vector<RtpSenderInfo>* current_senders =
4019 GetRemoteSenderInfos(media_type);
deadbeefab9b2d12015-10-14 11:33:11 -07004020
Steve Anton4171afb2017-11-20 10:20:22 -08004021 // Find removed senders. I.e., senders where the sender id or ssrc don't match
deadbeeffac06552015-11-25 11:26:01 -08004022 // the new StreamParam.
Steve Anton4171afb2017-11-20 10:20:22 -08004023 for (auto sender_it = current_senders->begin();
4024 sender_it != current_senders->end();
4025 /* incremented manually */) {
4026 const RtpSenderInfo& info = *sender_it;
deadbeefab9b2d12015-10-14 11:33:11 -07004027 const cricket::StreamParams* params =
Steve Anton4171afb2017-11-20 10:20:22 -08004028 cricket::GetStreamBySsrc(streams, info.first_ssrc);
Seth Hampson83d676b2018-04-05 18:12:09 -07004029 std::string params_stream_id;
4030 if (params) {
4031 params_stream_id =
4032 (!params->first_stream_id().empty() ? params->first_stream_id()
4033 : kDefaultStreamId);
4034 }
Seth Hampson5b4f0752018-04-02 16:31:36 -07004035 bool sender_exists = params && params->id == info.sender_id &&
Seth Hampson83d676b2018-04-05 18:12:09 -07004036 params_stream_id == info.stream_id;
deadbeefbda7e0b2015-12-08 17:13:40 -08004037 // If this is a default track, and we still need it, don't remove it.
Seth Hampson845e8782018-03-02 11:34:10 -08004038 if ((info.stream_id == kDefaultStreamId && default_sender_needed) ||
Steve Anton4171afb2017-11-20 10:20:22 -08004039 sender_exists) {
4040 ++sender_it;
deadbeefbda7e0b2015-12-08 17:13:40 -08004041 } else {
Steve Anton4171afb2017-11-20 10:20:22 -08004042 OnRemoteSenderRemoved(info, media_type);
4043 sender_it = current_senders->erase(sender_it);
deadbeefab9b2d12015-10-14 11:33:11 -07004044 }
4045 }
4046
Steve Anton4171afb2017-11-20 10:20:22 -08004047 // Find new and active senders.
deadbeefab9b2d12015-10-14 11:33:11 -07004048 for (const cricket::StreamParams& params : streams) {
Seth Hampson5897a6e2018-04-03 11:16:33 -07004049 if (!params.has_ssrcs()) {
4050 // The remote endpoint has streams, but didn't signal ssrcs. For an active
4051 // sender, this means it is coming from a Unified Plan endpoint,so we just
4052 // create a default.
4053 default_sender_needed = true;
4054 break;
4055 }
4056
Seth Hampson845e8782018-03-02 11:34:10 -08004057 // |params.id| is the sender id and the stream id uses the first of
Seth Hampson5b4f0752018-04-02 16:31:36 -07004058 // |params.stream_ids|. The remote description could come from a Unified
Seth Hampson5897a6e2018-04-03 11:16:33 -07004059 // Plan endpoint, with multiple or no stream_ids() signaled. Since this is
4060 // not supported in Plan B, we just take the first here and create the
4061 // default stream ID if none is specified.
Seth Hampson845e8782018-03-02 11:34:10 -08004062 const std::string& stream_id =
Seth Hampson83d676b2018-04-05 18:12:09 -07004063 (!params.first_stream_id().empty() ? params.first_stream_id()
4064 : kDefaultStreamId);
Steve Anton4171afb2017-11-20 10:20:22 -08004065 const std::string& sender_id = params.id;
deadbeefab9b2d12015-10-14 11:33:11 -07004066 uint32_t ssrc = params.first_ssrc();
4067
4068 rtc::scoped_refptr<MediaStreamInterface> stream =
Seth Hampson845e8782018-03-02 11:34:10 -08004069 remote_streams_->find(stream_id);
deadbeefab9b2d12015-10-14 11:33:11 -07004070 if (!stream) {
4071 // This is a new MediaStream. Create a new remote MediaStream.
perkjd61bf802016-03-24 03:16:19 -07004072 stream = MediaStreamProxy::Create(rtc::Thread::Current(),
Seth Hampson845e8782018-03-02 11:34:10 -08004073 MediaStream::Create(stream_id));
deadbeefab9b2d12015-10-14 11:33:11 -07004074 remote_streams_->AddStream(stream);
4075 new_streams->AddStream(stream);
4076 }
4077
Steve Anton4171afb2017-11-20 10:20:22 -08004078 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00004079 FindSenderInfo(*current_senders, stream_id, sender_id);
Steve Anton4171afb2017-11-20 10:20:22 -08004080 if (!sender_info) {
Seth Hampson845e8782018-03-02 11:34:10 -08004081 current_senders->push_back(RtpSenderInfo(stream_id, sender_id, ssrc));
Steve Anton4171afb2017-11-20 10:20:22 -08004082 OnRemoteSenderAdded(current_senders->back(), media_type);
deadbeefab9b2d12015-10-14 11:33:11 -07004083 }
4084 }
deadbeefbda7e0b2015-12-08 17:13:40 -08004085
Steve Anton4171afb2017-11-20 10:20:22 -08004086 // Add default sender if necessary.
4087 if (default_sender_needed) {
deadbeefbda7e0b2015-12-08 17:13:40 -08004088 rtc::scoped_refptr<MediaStreamInterface> default_stream =
Seth Hampson845e8782018-03-02 11:34:10 -08004089 remote_streams_->find(kDefaultStreamId);
deadbeefbda7e0b2015-12-08 17:13:40 -08004090 if (!default_stream) {
4091 // Create the new default MediaStream.
perkjd61bf802016-03-24 03:16:19 -07004092 default_stream = MediaStreamProxy::Create(
Seth Hampson845e8782018-03-02 11:34:10 -08004093 rtc::Thread::Current(), MediaStream::Create(kDefaultStreamId));
deadbeefbda7e0b2015-12-08 17:13:40 -08004094 remote_streams_->AddStream(default_stream);
4095 new_streams->AddStream(default_stream);
4096 }
Steve Anton4171afb2017-11-20 10:20:22 -08004097 std::string default_sender_id = (media_type == cricket::MEDIA_TYPE_AUDIO)
4098 ? kDefaultAudioSenderId
4099 : kDefaultVideoSenderId;
Seth Hampson845e8782018-03-02 11:34:10 -08004100 const RtpSenderInfo* default_sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00004101 FindSenderInfo(*current_senders, kDefaultStreamId, default_sender_id);
Steve Anton4171afb2017-11-20 10:20:22 -08004102 if (!default_sender_info) {
4103 current_senders->push_back(
Seth Hampson845e8782018-03-02 11:34:10 -08004104 RtpSenderInfo(kDefaultStreamId, default_sender_id, 0));
Steve Anton4171afb2017-11-20 10:20:22 -08004105 OnRemoteSenderAdded(current_senders->back(), media_type);
deadbeefbda7e0b2015-12-08 17:13:40 -08004106 }
4107 }
deadbeefab9b2d12015-10-14 11:33:11 -07004108}
4109
Steve Anton4171afb2017-11-20 10:20:22 -08004110void PeerConnection::OnRemoteSenderAdded(const RtpSenderInfo& sender_info,
4111 cricket::MediaType media_type) {
Steve Anton3d954a62018-04-02 11:27:23 -07004112 RTC_LOG(LS_INFO) << "Creating " << cricket::MediaTypeToString(media_type)
4113 << " receiver for track_id=" << sender_info.sender_id
4114 << " and stream_id=" << sender_info.stream_id;
deadbeefab9b2d12015-10-14 11:33:11 -07004115
Steve Anton3d954a62018-04-02 11:27:23 -07004116 MediaStreamInterface* stream = remote_streams_->find(sender_info.stream_id);
deadbeefab9b2d12015-10-14 11:33:11 -07004117 if (media_type == cricket::MEDIA_TYPE_AUDIO) {
Steve Anton4171afb2017-11-20 10:20:22 -08004118 CreateAudioReceiver(stream, sender_info);
deadbeefab9b2d12015-10-14 11:33:11 -07004119 } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
Steve Anton4171afb2017-11-20 10:20:22 -08004120 CreateVideoReceiver(stream, sender_info);
deadbeefab9b2d12015-10-14 11:33:11 -07004121 } else {
nisseeb4ca4e2017-01-12 02:24:27 -08004122 RTC_NOTREACHED() << "Invalid media type";
deadbeefab9b2d12015-10-14 11:33:11 -07004123 }
4124}
4125
Steve Anton4171afb2017-11-20 10:20:22 -08004126void PeerConnection::OnRemoteSenderRemoved(const RtpSenderInfo& sender_info,
4127 cricket::MediaType media_type) {
Seth Hampson83d676b2018-04-05 18:12:09 -07004128 RTC_LOG(LS_INFO) << "Removing " << cricket::MediaTypeToString(media_type)
4129 << " receiver for track_id=" << sender_info.sender_id
4130 << " and stream_id=" << sender_info.stream_id;
4131
Seth Hampson845e8782018-03-02 11:34:10 -08004132 MediaStreamInterface* stream = remote_streams_->find(sender_info.stream_id);
deadbeefab9b2d12015-10-14 11:33:11 -07004133
Henrik Boström933d8b02017-10-10 10:05:16 -07004134 rtc::scoped_refptr<RtpReceiverInterface> receiver;
deadbeefab9b2d12015-10-14 11:33:11 -07004135 if (media_type == cricket::MEDIA_TYPE_AUDIO) {
perkjd61bf802016-03-24 03:16:19 -07004136 // When the MediaEngine audio channel is destroyed, the RemoteAudioSource
4137 // will be notified which will end the AudioRtpReceiver::track().
Steve Anton4171afb2017-11-20 10:20:22 -08004138 receiver = RemoveAndStopReceiver(sender_info);
deadbeefab9b2d12015-10-14 11:33:11 -07004139 rtc::scoped_refptr<AudioTrackInterface> audio_track =
Steve Anton4171afb2017-11-20 10:20:22 -08004140 stream->FindAudioTrack(sender_info.sender_id);
deadbeefab9b2d12015-10-14 11:33:11 -07004141 if (audio_track) {
deadbeefab9b2d12015-10-14 11:33:11 -07004142 stream->RemoveTrack(audio_track);
deadbeefab9b2d12015-10-14 11:33:11 -07004143 }
4144 } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
perkjd61bf802016-03-24 03:16:19 -07004145 // Stopping or destroying a VideoRtpReceiver will end the
4146 // VideoRtpReceiver::track().
Steve Anton4171afb2017-11-20 10:20:22 -08004147 receiver = RemoveAndStopReceiver(sender_info);
deadbeefab9b2d12015-10-14 11:33:11 -07004148 rtc::scoped_refptr<VideoTrackInterface> video_track =
Steve Anton4171afb2017-11-20 10:20:22 -08004149 stream->FindVideoTrack(sender_info.sender_id);
deadbeefab9b2d12015-10-14 11:33:11 -07004150 if (video_track) {
perkjd61bf802016-03-24 03:16:19 -07004151 // There's no guarantee the track is still available, e.g. the track may
4152 // have been removed from the stream by an application.
deadbeefab9b2d12015-10-14 11:33:11 -07004153 stream->RemoveTrack(video_track);
deadbeefab9b2d12015-10-14 11:33:11 -07004154 }
4155 } else {
nisseede5da42017-01-12 05:15:36 -08004156 RTC_NOTREACHED() << "Invalid media type";
deadbeefab9b2d12015-10-14 11:33:11 -07004157 }
Henrik Boström933d8b02017-10-10 10:05:16 -07004158 if (receiver) {
4159 observer_->OnRemoveTrack(receiver);
4160 }
deadbeefab9b2d12015-10-14 11:33:11 -07004161}
4162
4163void PeerConnection::UpdateEndedRemoteMediaStreams() {
4164 std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_to_remove;
4165 for (size_t i = 0; i < remote_streams_->count(); ++i) {
4166 MediaStreamInterface* stream = remote_streams_->at(i);
4167 if (stream->GetAudioTracks().empty() && stream->GetVideoTracks().empty()) {
4168 streams_to_remove.push_back(stream);
4169 }
4170 }
4171
Taylor Brandstetter98cde262016-05-31 13:02:21 -07004172 for (auto& stream : streams_to_remove) {
deadbeefab9b2d12015-10-14 11:33:11 -07004173 remote_streams_->RemoveStream(stream);
Taylor Brandstetter98cde262016-05-31 13:02:21 -07004174 observer_->OnRemoveStream(std::move(stream));
deadbeefab9b2d12015-10-14 11:33:11 -07004175 }
4176}
4177
Steve Anton4171afb2017-11-20 10:20:22 -08004178void PeerConnection::UpdateLocalSenders(
deadbeefab9b2d12015-10-14 11:33:11 -07004179 const std::vector<cricket::StreamParams>& streams,
4180 cricket::MediaType media_type) {
Steve Anton4171afb2017-11-20 10:20:22 -08004181 std::vector<RtpSenderInfo>* current_senders = GetLocalSenderInfos(media_type);
deadbeefab9b2d12015-10-14 11:33:11 -07004182
Seth Hampson845e8782018-03-02 11:34:10 -08004183 // Find removed tracks. I.e., tracks where the track id, stream id or ssrc
deadbeefab9b2d12015-10-14 11:33:11 -07004184 // don't match the new StreamParam.
Steve Anton4171afb2017-11-20 10:20:22 -08004185 for (auto sender_it = current_senders->begin();
4186 sender_it != current_senders->end();
4187 /* incremented manually */) {
4188 const RtpSenderInfo& info = *sender_it;
deadbeefab9b2d12015-10-14 11:33:11 -07004189 const cricket::StreamParams* params =
Steve Anton4171afb2017-11-20 10:20:22 -08004190 cricket::GetStreamBySsrc(streams, info.first_ssrc);
4191 if (!params || params->id != info.sender_id ||
Seth Hampson845e8782018-03-02 11:34:10 -08004192 params->first_stream_id() != info.stream_id) {
Steve Anton4171afb2017-11-20 10:20:22 -08004193 OnLocalSenderRemoved(info, media_type);
4194 sender_it = current_senders->erase(sender_it);
deadbeefab9b2d12015-10-14 11:33:11 -07004195 } else {
Steve Anton4171afb2017-11-20 10:20:22 -08004196 ++sender_it;
deadbeefab9b2d12015-10-14 11:33:11 -07004197 }
4198 }
4199
Steve Anton4171afb2017-11-20 10:20:22 -08004200 // Find new and active senders.
deadbeefab9b2d12015-10-14 11:33:11 -07004201 for (const cricket::StreamParams& params : streams) {
4202 // The sync_label is the MediaStream label and the |stream.id| is the
Steve Anton4171afb2017-11-20 10:20:22 -08004203 // sender id.
Seth Hampson845e8782018-03-02 11:34:10 -08004204 const std::string& stream_id = params.first_stream_id();
Steve Anton4171afb2017-11-20 10:20:22 -08004205 const std::string& sender_id = params.id;
deadbeefab9b2d12015-10-14 11:33:11 -07004206 uint32_t ssrc = params.first_ssrc();
Steve Anton4171afb2017-11-20 10:20:22 -08004207 const RtpSenderInfo* sender_info =
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00004208 FindSenderInfo(*current_senders, stream_id, sender_id);
Steve Anton4171afb2017-11-20 10:20:22 -08004209 if (!sender_info) {
Seth Hampson845e8782018-03-02 11:34:10 -08004210 current_senders->push_back(RtpSenderInfo(stream_id, sender_id, ssrc));
Steve Anton4171afb2017-11-20 10:20:22 -08004211 OnLocalSenderAdded(current_senders->back(), media_type);
deadbeefab9b2d12015-10-14 11:33:11 -07004212 }
4213 }
4214}
4215
Steve Anton4171afb2017-11-20 10:20:22 -08004216void PeerConnection::OnLocalSenderAdded(const RtpSenderInfo& sender_info,
4217 cricket::MediaType media_type) {
Seth Hampson5b4f0752018-04-02 16:31:36 -07004218 RTC_DCHECK(!IsUnifiedPlan());
Steve Anton4171afb2017-11-20 10:20:22 -08004219 auto sender = FindSenderById(sender_info.sender_id);
deadbeeffac06552015-11-25 11:26:01 -08004220 if (!sender) {
Steve Anton4171afb2017-11-20 10:20:22 -08004221 RTC_LOG(LS_WARNING) << "An unknown RtpSender with id "
4222 << sender_info.sender_id
Mirko Bonadei675513b2017-11-09 11:09:25 +01004223 << " has been configured in the local description.";
deadbeefab9b2d12015-10-14 11:33:11 -07004224 return;
4225 }
4226
deadbeeffac06552015-11-25 11:26:01 -08004227 if (sender->media_type() != media_type) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004228 RTC_LOG(LS_WARNING) << "An RtpSender has been configured in the local"
Jonas Olsson45cc8902018-02-13 10:37:07 +01004229 " description with an unexpected media type.";
deadbeeffac06552015-11-25 11:26:01 -08004230 return;
deadbeefab9b2d12015-10-14 11:33:11 -07004231 }
deadbeeffac06552015-11-25 11:26:01 -08004232
Seth Hampson5b4f0752018-04-02 16:31:36 -07004233 sender->internal()->set_stream_ids({sender_info.stream_id});
Steve Anton4171afb2017-11-20 10:20:22 -08004234 sender->internal()->SetSsrc(sender_info.first_ssrc);
deadbeefab9b2d12015-10-14 11:33:11 -07004235}
4236
Steve Anton4171afb2017-11-20 10:20:22 -08004237void PeerConnection::OnLocalSenderRemoved(const RtpSenderInfo& sender_info,
4238 cricket::MediaType media_type) {
4239 auto sender = FindSenderById(sender_info.sender_id);
deadbeeffac06552015-11-25 11:26:01 -08004240 if (!sender) {
4241 // This is the normal case. I.e., RemoveStream has been called and the
deadbeefab9b2d12015-10-14 11:33:11 -07004242 // SessionDescriptions has been renegotiated.
4243 return;
4244 }
deadbeeffac06552015-11-25 11:26:01 -08004245
4246 // A sender has been removed from the SessionDescription but it's still
4247 // associated with the PeerConnection. This only occurs if the SDP doesn't
4248 // match with the calls to CreateSender, AddStream and RemoveStream.
4249 if (sender->media_type() != media_type) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004250 RTC_LOG(LS_WARNING) << "An RtpSender has been configured in the local"
Jonas Olsson45cc8902018-02-13 10:37:07 +01004251 " description with an unexpected media type.";
deadbeeffac06552015-11-25 11:26:01 -08004252 return;
deadbeefab9b2d12015-10-14 11:33:11 -07004253 }
deadbeeffac06552015-11-25 11:26:01 -08004254
Steve Anton4171afb2017-11-20 10:20:22 -08004255 sender->internal()->SetSsrc(0);
deadbeefab9b2d12015-10-14 11:33:11 -07004256}
4257
4258void PeerConnection::UpdateLocalRtpDataChannels(
4259 const cricket::StreamParamsVec& streams) {
4260 std::vector<std::string> existing_channels;
4261
4262 // Find new and active data channels.
4263 for (const cricket::StreamParams& params : streams) {
4264 // |it->sync_label| is actually the data channel label. The reason is that
4265 // we use the same naming of data channels as we do for
4266 // MediaStreams and Tracks.
4267 // For MediaStreams, the sync_label is the MediaStream label and the
4268 // track label is the same as |streamid|.
Seth Hampson845e8782018-03-02 11:34:10 -08004269 const std::string& channel_label = params.first_stream_id();
deadbeefab9b2d12015-10-14 11:33:11 -07004270 auto data_channel_it = rtp_data_channels_.find(channel_label);
nisse7ce109a2017-01-31 00:57:56 -08004271 if (data_channel_it == rtp_data_channels_.end()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004272 RTC_LOG(LS_ERROR) << "channel label not found";
deadbeefab9b2d12015-10-14 11:33:11 -07004273 continue;
4274 }
4275 // Set the SSRC the data channel should use for sending.
4276 data_channel_it->second->SetSendSsrc(params.first_ssrc());
4277 existing_channels.push_back(data_channel_it->first);
4278 }
4279
4280 UpdateClosingRtpDataChannels(existing_channels, true);
4281}
4282
4283void PeerConnection::UpdateRemoteRtpDataChannels(
4284 const cricket::StreamParamsVec& streams) {
4285 std::vector<std::string> existing_channels;
4286
4287 // Find new and active data channels.
4288 for (const cricket::StreamParams& params : streams) {
4289 // The data channel label is either the mslabel or the SSRC if the mslabel
4290 // does not exist. Ex a=ssrc:444330170 mslabel:test1.
Seth Hampson845e8782018-03-02 11:34:10 -08004291 std::string label = params.first_stream_id().empty()
deadbeefab9b2d12015-10-14 11:33:11 -07004292 ? rtc::ToString(params.first_ssrc())
Seth Hampson845e8782018-03-02 11:34:10 -08004293 : params.first_stream_id();
deadbeefab9b2d12015-10-14 11:33:11 -07004294 auto data_channel_it = rtp_data_channels_.find(label);
4295 if (data_channel_it == rtp_data_channels_.end()) {
4296 // This is a new data channel.
4297 CreateRemoteRtpDataChannel(label, params.first_ssrc());
4298 } else {
4299 data_channel_it->second->SetReceiveSsrc(params.first_ssrc());
4300 }
4301 existing_channels.push_back(label);
4302 }
4303
4304 UpdateClosingRtpDataChannels(existing_channels, false);
4305}
4306
4307void PeerConnection::UpdateClosingRtpDataChannels(
4308 const std::vector<std::string>& active_channels,
4309 bool is_local_update) {
4310 auto it = rtp_data_channels_.begin();
4311 while (it != rtp_data_channels_.end()) {
4312 DataChannel* data_channel = it->second;
4313 if (std::find(active_channels.begin(), active_channels.end(),
4314 data_channel->label()) != active_channels.end()) {
4315 ++it;
4316 continue;
4317 }
4318
4319 if (is_local_update) {
4320 data_channel->SetSendSsrc(0);
4321 } else {
4322 data_channel->RemotePeerRequestClose();
4323 }
4324
4325 if (data_channel->state() == DataChannel::kClosed) {
4326 rtp_data_channels_.erase(it);
4327 it = rtp_data_channels_.begin();
4328 } else {
4329 ++it;
4330 }
4331 }
4332}
4333
4334void PeerConnection::CreateRemoteRtpDataChannel(const std::string& label,
4335 uint32_t remote_ssrc) {
4336 rtc::scoped_refptr<DataChannel> channel(
4337 InternalCreateDataChannel(label, nullptr));
4338 if (!channel.get()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004339 RTC_LOG(LS_WARNING) << "Remote peer requested a DataChannel but"
Jonas Olsson45cc8902018-02-13 10:37:07 +01004340 "CreateDataChannel failed.";
deadbeefab9b2d12015-10-14 11:33:11 -07004341 return;
4342 }
4343 channel->SetReceiveSsrc(remote_ssrc);
deadbeefa601f5c2016-06-06 14:27:39 -07004344 rtc::scoped_refptr<DataChannelInterface> proxy_channel =
4345 DataChannelProxy::Create(signaling_thread(), channel);
Taylor Brandstetter98cde262016-05-31 13:02:21 -07004346 observer_->OnDataChannel(std::move(proxy_channel));
deadbeefab9b2d12015-10-14 11:33:11 -07004347}
4348
4349rtc::scoped_refptr<DataChannel> PeerConnection::InternalCreateDataChannel(
4350 const std::string& label,
4351 const InternalDataChannelInit* config) {
4352 if (IsClosed()) {
4353 return nullptr;
4354 }
Steve Anton75737c02017-11-06 10:37:17 -08004355 if (data_channel_type() == cricket::DCT_NONE) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004356 RTC_LOG(LS_ERROR)
deadbeefab9b2d12015-10-14 11:33:11 -07004357 << "InternalCreateDataChannel: Data is not supported in this call.";
4358 return nullptr;
4359 }
4360 InternalDataChannelInit new_config =
4361 config ? (*config) : InternalDataChannelInit();
Steve Anton75737c02017-11-06 10:37:17 -08004362 if (data_channel_type() == cricket::DCT_SCTP) {
deadbeefab9b2d12015-10-14 11:33:11 -07004363 if (new_config.id < 0) {
4364 rtc::SSLRole role;
Steve Anton75737c02017-11-06 10:37:17 -08004365 if ((GetSctpSslRole(&role)) &&
deadbeefab9b2d12015-10-14 11:33:11 -07004366 !sid_allocator_.AllocateSid(role, &new_config.id)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004367 RTC_LOG(LS_ERROR)
4368 << "No id can be allocated for the SCTP data channel.";
deadbeefab9b2d12015-10-14 11:33:11 -07004369 return nullptr;
4370 }
4371 } else if (!sid_allocator_.ReserveSid(new_config.id)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004372 RTC_LOG(LS_ERROR) << "Failed to create a SCTP data channel "
Jonas Olsson45cc8902018-02-13 10:37:07 +01004373 "because the id is already in use or out of range.";
deadbeefab9b2d12015-10-14 11:33:11 -07004374 return nullptr;
4375 }
4376 }
4377
Steve Anton75737c02017-11-06 10:37:17 -08004378 rtc::scoped_refptr<DataChannel> channel(
4379 DataChannel::Create(this, data_channel_type(), label, new_config));
deadbeefab9b2d12015-10-14 11:33:11 -07004380 if (!channel) {
4381 sid_allocator_.ReleaseSid(new_config.id);
4382 return nullptr;
4383 }
4384
4385 if (channel->data_channel_type() == cricket::DCT_RTP) {
4386 if (rtp_data_channels_.find(channel->label()) != rtp_data_channels_.end()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004387 RTC_LOG(LS_ERROR) << "DataChannel with label " << channel->label()
4388 << " already exists.";
deadbeefab9b2d12015-10-14 11:33:11 -07004389 return nullptr;
4390 }
4391 rtp_data_channels_[channel->label()] = channel;
4392 } else {
4393 RTC_DCHECK(channel->data_channel_type() == cricket::DCT_SCTP);
4394 sctp_data_channels_.push_back(channel);
4395 channel->SignalClosed.connect(this,
4396 &PeerConnection::OnSctpDataChannelClosed);
4397 }
4398
Steve Anton2d8609c2018-01-23 16:38:46 -08004399 SignalDataChannelCreated_(channel.get());
deadbeefab9b2d12015-10-14 11:33:11 -07004400 return channel;
4401}
4402
4403bool PeerConnection::HasDataChannels() const {
4404 return !rtp_data_channels_.empty() || !sctp_data_channels_.empty();
4405}
4406
4407void PeerConnection::AllocateSctpSids(rtc::SSLRole role) {
4408 for (const auto& channel : sctp_data_channels_) {
4409 if (channel->id() < 0) {
4410 int sid;
4411 if (!sid_allocator_.AllocateSid(role, &sid)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004412 RTC_LOG(LS_ERROR) << "Failed to allocate SCTP sid.";
deadbeefab9b2d12015-10-14 11:33:11 -07004413 continue;
4414 }
4415 channel->SetSctpSid(sid);
4416 }
4417 }
4418}
4419
4420void PeerConnection::OnSctpDataChannelClosed(DataChannel* channel) {
deadbeefbd292462015-12-14 18:15:29 -08004421 RTC_DCHECK(signaling_thread()->IsCurrent());
deadbeefab9b2d12015-10-14 11:33:11 -07004422 for (auto it = sctp_data_channels_.begin(); it != sctp_data_channels_.end();
4423 ++it) {
4424 if (it->get() == channel) {
4425 if (channel->id() >= 0) {
4426 sid_allocator_.ReleaseSid(channel->id());
4427 }
deadbeefbd292462015-12-14 18:15:29 -08004428 // Since this method is triggered by a signal from the DataChannel,
4429 // we can't free it directly here; we need to free it asynchronously.
4430 sctp_data_channels_to_free_.push_back(*it);
deadbeefab9b2d12015-10-14 11:33:11 -07004431 sctp_data_channels_.erase(it);
Taylor Brandstetter5d97a9a2016-06-10 14:17:27 -07004432 signaling_thread()->Post(RTC_FROM_HERE, this, MSG_FREE_DATACHANNELS,
4433 nullptr);
deadbeefab9b2d12015-10-14 11:33:11 -07004434 return;
4435 }
4436 }
4437}
4438
deadbeefab9b2d12015-10-14 11:33:11 -07004439void PeerConnection::OnDataChannelDestroyed() {
4440 // Use a temporary copy of the RTP/SCTP DataChannel list because the
4441 // DataChannel may callback to us and try to modify the list.
4442 std::map<std::string, rtc::scoped_refptr<DataChannel>> temp_rtp_dcs;
4443 temp_rtp_dcs.swap(rtp_data_channels_);
4444 for (const auto& kv : temp_rtp_dcs) {
4445 kv.second->OnTransportChannelDestroyed();
4446 }
4447
4448 std::vector<rtc::scoped_refptr<DataChannel>> temp_sctp_dcs;
4449 temp_sctp_dcs.swap(sctp_data_channels_);
4450 for (const auto& channel : temp_sctp_dcs) {
4451 channel->OnTransportChannelDestroyed();
4452 }
4453}
4454
4455void PeerConnection::OnDataChannelOpenMessage(
4456 const std::string& label,
4457 const InternalDataChannelInit& config) {
4458 rtc::scoped_refptr<DataChannel> channel(
4459 InternalCreateDataChannel(label, &config));
4460 if (!channel.get()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004461 RTC_LOG(LS_ERROR) << "Failed to create DataChannel from the OPEN message.";
deadbeefab9b2d12015-10-14 11:33:11 -07004462 return;
4463 }
4464
deadbeefa601f5c2016-06-06 14:27:39 -07004465 rtc::scoped_refptr<DataChannelInterface> proxy_channel =
4466 DataChannelProxy::Create(signaling_thread(), channel);
Taylor Brandstetter98cde262016-05-31 13:02:21 -07004467 observer_->OnDataChannel(std::move(proxy_channel));
deadbeefab9b2d12015-10-14 11:33:11 -07004468}
4469
Steve Anton4171afb2017-11-20 10:20:22 -08004470rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
4471PeerConnection::GetAudioTransceiver() const {
4472 // This method only works with Plan B SDP, where there is a single
4473 // audio/video transceiver.
4474 RTC_DCHECK(!IsUnifiedPlan());
4475 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -08004476 if (transceiver->media_type() == cricket::MEDIA_TYPE_AUDIO) {
Steve Anton4171afb2017-11-20 10:20:22 -08004477 return transceiver;
4478 }
4479 }
4480 RTC_NOTREACHED();
4481 return nullptr;
4482}
4483
4484rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
4485PeerConnection::GetVideoTransceiver() const {
4486 // This method only works with Plan B SDP, where there is a single
4487 // audio/video transceiver.
4488 RTC_DCHECK(!IsUnifiedPlan());
4489 for (auto transceiver : transceivers_) {
Steve Anton69470252018-02-09 11:43:08 -08004490 if (transceiver->media_type() == cricket::MEDIA_TYPE_VIDEO) {
Steve Anton4171afb2017-11-20 10:20:22 -08004491 return transceiver;
4492 }
4493 }
4494 RTC_NOTREACHED();
4495 return nullptr;
4496}
4497
4498// TODO(bugs.webrtc.org/7600): Remove this when multiple transceivers with
4499// individual transceiver directions are supported.
zhihuang1c378ed2017-08-17 14:10:50 -07004500bool PeerConnection::HasRtpSender(cricket::MediaType type) const {
Steve Anton4171afb2017-11-20 10:20:22 -08004501 switch (type) {
4502 case cricket::MEDIA_TYPE_AUDIO:
4503 return !GetAudioTransceiver()->internal()->senders().empty();
4504 case cricket::MEDIA_TYPE_VIDEO:
4505 return !GetVideoTransceiver()->internal()->senders().empty();
4506 case cricket::MEDIA_TYPE_DATA:
4507 return false;
4508 }
4509 RTC_NOTREACHED();
4510 return false;
zhihuang1c378ed2017-08-17 14:10:50 -07004511}
4512
Steve Anton4171afb2017-11-20 10:20:22 -08004513rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>
4514PeerConnection::FindSenderForTrack(MediaStreamTrackInterface* track) const {
4515 for (auto transceiver : transceivers_) {
4516 for (auto sender : transceiver->internal()->senders()) {
4517 if (sender->track() == track) {
4518 return sender;
4519 }
4520 }
4521 }
4522 return nullptr;
deadbeeffac06552015-11-25 11:26:01 -08004523}
4524
Steve Anton4171afb2017-11-20 10:20:22 -08004525rtc::scoped_refptr<RtpSenderProxyWithInternal<RtpSenderInternal>>
4526PeerConnection::FindSenderById(const std::string& sender_id) const {
4527 for (auto transceiver : transceivers_) {
4528 for (auto sender : transceiver->internal()->senders()) {
4529 if (sender->id() == sender_id) {
4530 return sender;
4531 }
4532 }
4533 }
4534 return nullptr;
deadbeef70ab1a12015-09-28 16:53:55 -07004535}
4536
Steve Anton4171afb2017-11-20 10:20:22 -08004537rtc::scoped_refptr<RtpReceiverProxyWithInternal<RtpReceiverInternal>>
4538PeerConnection::FindReceiverById(const std::string& receiver_id) const {
4539 for (auto transceiver : transceivers_) {
4540 for (auto receiver : transceiver->internal()->receivers()) {
4541 if (receiver->id() == receiver_id) {
4542 return receiver;
4543 }
4544 }
4545 }
4546 return nullptr;
deadbeef70ab1a12015-09-28 16:53:55 -07004547}
4548
Steve Anton4171afb2017-11-20 10:20:22 -08004549std::vector<PeerConnection::RtpSenderInfo>*
4550PeerConnection::GetRemoteSenderInfos(cricket::MediaType media_type) {
4551 RTC_DCHECK(media_type == cricket::MEDIA_TYPE_AUDIO ||
4552 media_type == cricket::MEDIA_TYPE_VIDEO);
4553 return (media_type == cricket::MEDIA_TYPE_AUDIO)
4554 ? &remote_audio_sender_infos_
4555 : &remote_video_sender_infos_;
4556}
4557
4558std::vector<PeerConnection::RtpSenderInfo>* PeerConnection::GetLocalSenderInfos(
deadbeefab9b2d12015-10-14 11:33:11 -07004559 cricket::MediaType media_type) {
4560 RTC_DCHECK(media_type == cricket::MEDIA_TYPE_AUDIO ||
4561 media_type == cricket::MEDIA_TYPE_VIDEO);
Steve Anton4171afb2017-11-20 10:20:22 -08004562 return (media_type == cricket::MEDIA_TYPE_AUDIO) ? &local_audio_sender_infos_
4563 : &local_video_sender_infos_;
deadbeefab9b2d12015-10-14 11:33:11 -07004564}
4565
Steve Anton4171afb2017-11-20 10:20:22 -08004566const PeerConnection::RtpSenderInfo* PeerConnection::FindSenderInfo(
4567 const std::vector<PeerConnection::RtpSenderInfo>& infos,
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00004568 const std::string& stream_id,
Steve Anton4171afb2017-11-20 10:20:22 -08004569 const std::string sender_id) const {
4570 for (const RtpSenderInfo& sender_info : infos) {
Emircan Uysalerbc609ea2018-03-27 21:57:18 +00004571 if (sender_info.stream_id == stream_id &&
4572 sender_info.sender_id == sender_id) {
Steve Anton4171afb2017-11-20 10:20:22 -08004573 return &sender_info;
deadbeefab9b2d12015-10-14 11:33:11 -07004574 }
4575 }
4576 return nullptr;
4577}
4578
4579DataChannel* PeerConnection::FindDataChannelBySid(int sid) const {
4580 for (const auto& channel : sctp_data_channels_) {
4581 if (channel->id() == sid) {
4582 return channel;
4583 }
4584 }
4585 return nullptr;
4586}
4587
deadbeef91dd5672016-05-18 16:55:30 -07004588bool PeerConnection::InitializePortAllocator_n(
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004589 const RTCConfiguration& configuration) {
4590 cricket::ServerAddresses stun_servers;
4591 std::vector<cricket::RelayServerConfig> turn_servers;
deadbeef293e9262017-01-11 12:28:30 -08004592 if (ParseIceServers(configuration.servers, &stun_servers, &turn_servers) !=
4593 RTCErrorType::NONE) {
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004594 return false;
4595 }
4596
Taylor Brandstetterf8e65772016-06-27 17:20:15 -07004597 port_allocator_->Initialize();
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004598 // To handle both internal and externally created port allocator, we will
4599 // enable BUNDLE here.
Qingsi Wanga2d60672018-04-11 16:57:45 -07004600 port_allocator_flags_ = port_allocator_->flags();
4601 port_allocator_flags_ |= cricket::PORTALLOCATOR_ENABLE_SHARED_SOCKET |
4602 cricket::PORTALLOCATOR_ENABLE_IPV6 |
4603 cricket::PORTALLOCATOR_ENABLE_IPV6_ON_WIFI;
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004604 // If the disable-IPv6 flag was specified, we'll not override it
4605 // by experiment.
4606 if (configuration.disable_ipv6) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004607 port_allocator_flags_ &= ~(cricket::PORTALLOCATOR_ENABLE_IPV6);
sprangc1b57a12017-02-28 08:50:47 -08004608 } else if (webrtc::field_trial::FindFullName("WebRTC-IPv6Default")
4609 .find("Disabled") == 0) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004610 port_allocator_flags_ &= ~(cricket::PORTALLOCATOR_ENABLE_IPV6);
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004611 }
4612
zhihuangb09b3f92017-03-07 14:40:51 -08004613 if (configuration.disable_ipv6_on_wifi) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004614 port_allocator_flags_ &= ~(cricket::PORTALLOCATOR_ENABLE_IPV6_ON_WIFI);
Mirko Bonadei675513b2017-11-09 11:09:25 +01004615 RTC_LOG(LS_INFO) << "IPv6 candidates on Wi-Fi are disabled.";
zhihuangb09b3f92017-03-07 14:40:51 -08004616 }
4617
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004618 if (configuration.tcp_candidate_policy == kTcpCandidatePolicyDisabled) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004619 port_allocator_flags_ |= cricket::PORTALLOCATOR_DISABLE_TCP;
Mirko Bonadei675513b2017-11-09 11:09:25 +01004620 RTC_LOG(LS_INFO) << "TCP candidates are disabled.";
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004621 }
4622
honghaiz60347052016-05-31 18:29:12 -07004623 if (configuration.candidate_network_policy ==
4624 kCandidateNetworkPolicyLowCost) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004625 port_allocator_flags_ |= cricket::PORTALLOCATOR_DISABLE_COSTLY_NETWORKS;
Mirko Bonadei675513b2017-11-09 11:09:25 +01004626 RTC_LOG(LS_INFO) << "Do not gather candidates on high-cost networks";
honghaiz60347052016-05-31 18:29:12 -07004627 }
4628
Daniel Lazarenko2870b0a2018-01-25 10:30:22 +01004629 if (configuration.disable_link_local_networks) {
Qingsi Wanga2d60672018-04-11 16:57:45 -07004630 port_allocator_flags_ |= cricket::PORTALLOCATOR_DISABLE_LINK_LOCAL_NETWORKS;
Daniel Lazarenko2870b0a2018-01-25 10:30:22 +01004631 RTC_LOG(LS_INFO) << "Disable candidates on link-local network interfaces.";
4632 }
4633
Qingsi Wanga2d60672018-04-11 16:57:45 -07004634 port_allocator_->set_flags(port_allocator_flags_);
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004635 // No step delay is used while allocating ports.
4636 port_allocator_->set_step_delay(cricket::kMinimumStepDelay);
4637 port_allocator_->set_candidate_filter(
4638 ConvertIceTransportTypeToCandidateFilter(configuration.type));
deadbeefd21eab32017-07-26 16:50:11 -07004639 port_allocator_->set_max_ipv6_networks(configuration.max_ipv6_networks);
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004640
4641 // Call this last since it may create pooled allocator sessions using the
4642 // properties set above.
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08004643 port_allocator_->SetConfiguration(
4644 stun_servers, turn_servers, configuration.ice_candidate_pool_size,
4645 configuration.prune_turn_ports, configuration.turn_customizer,
4646 configuration.stun_candidate_keepalive_interval);
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004647 return true;
4648}
4649
deadbeef91dd5672016-05-18 16:55:30 -07004650bool PeerConnection::ReconfigurePortAllocator_n(
deadbeef293e9262017-01-11 12:28:30 -08004651 const cricket::ServerAddresses& stun_servers,
4652 const std::vector<cricket::RelayServerConfig>& turn_servers,
4653 IceTransportsType type,
4654 int candidate_pool_size,
Jonas Orelandbdcee282017-10-10 14:01:40 +02004655 bool prune_turn_ports,
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08004656 webrtc::TurnCustomizer* turn_customizer,
4657 rtc::Optional<int> stun_candidate_keepalive_interval) {
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004658 port_allocator_->set_candidate_filter(
deadbeef293e9262017-01-11 12:28:30 -08004659 ConvertIceTransportTypeToCandidateFilter(type));
Qingsi Wanga2d60672018-04-11 16:57:45 -07004660 // According to JSEP, after setLocalDescription, changing the candidate pool
4661 // size is not allowed, and changing the set of ICE servers will not result
4662 // in new candidates being gathered.
4663 if (local_description()) {
4664 port_allocator_->FreezeCandidatePool();
4665 }
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004666 // Call this last since it may create pooled allocator sessions using the
4667 // candidate filter set above.
deadbeef6de92f92016-12-12 18:49:32 -08004668 return port_allocator_->SetConfiguration(
Jonas Orelandbdcee282017-10-10 14:01:40 +02004669 stun_servers, turn_servers, candidate_pool_size, prune_turn_ports,
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08004670 turn_customizer, stun_candidate_keepalive_interval);
Taylor Brandstettera1c30352016-05-13 08:15:11 -07004671}
4672
Steve Antonba818672017-11-06 10:21:57 -08004673cricket::ChannelManager* PeerConnection::channel_manager() const {
4674 return factory_->channel_manager();
4675}
4676
4677MetricsObserverInterface* PeerConnection::metrics_observer() const {
4678 return uma_observer_;
4679}
4680
Elad Alon99c3fe52017-10-13 16:29:40 +02004681bool PeerConnection::StartRtcEventLog_w(
Bjorn Tereliusde939432017-11-20 17:38:14 +01004682 std::unique_ptr<RtcEventLogOutput> output,
4683 int64_t output_period_ms) {
zhihuang77985012017-02-07 15:45:16 -08004684 if (!event_log_) {
4685 return false;
4686 }
Bjorn Tereliusde939432017-11-20 17:38:14 +01004687 return event_log_->StartLogging(std::move(output), output_period_ms);
ivoc14d5dbe2016-07-04 07:06:55 -07004688}
4689
4690void PeerConnection::StopRtcEventLog_w() {
zhihuang77985012017-02-07 15:45:16 -08004691 if (event_log_) {
4692 event_log_->StopLogging();
4693 }
ivoc14d5dbe2016-07-04 07:06:55 -07004694}
nisseeaabdf62017-05-05 02:23:02 -07004695
Steve Anton75737c02017-11-06 10:37:17 -08004696cricket::BaseChannel* PeerConnection::GetChannel(
4697 const std::string& content_name) {
Steve Antondcc3c022017-12-22 16:02:54 -08004698 for (auto transceiver : transceivers_) {
4699 cricket::BaseChannel* channel = transceiver->internal()->channel();
4700 if (channel && channel->content_name() == content_name) {
4701 return channel;
4702 }
Steve Anton75737c02017-11-06 10:37:17 -08004703 }
4704 if (rtp_data_channel() &&
4705 rtp_data_channel()->content_name() == content_name) {
4706 return rtp_data_channel();
4707 }
4708 return nullptr;
4709}
4710
4711bool PeerConnection::GetSctpSslRole(rtc::SSLRole* role) {
4712 if (!local_description() || !remote_description()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004713 RTC_LOG(LS_INFO)
4714 << "Local and Remote descriptions must be applied to get the "
Jonas Olsson45cc8902018-02-13 10:37:07 +01004715 "SSL Role of the SCTP transport.";
Steve Anton75737c02017-11-06 10:37:17 -08004716 return false;
4717 }
4718 if (!sctp_transport_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004719 RTC_LOG(LS_INFO) << "Non-rejected SCTP m= section is needed to get the "
Jonas Olsson45cc8902018-02-13 10:37:07 +01004720 "SSL Role of the SCTP transport.";
Steve Anton75737c02017-11-06 10:37:17 -08004721 return false;
4722 }
4723
Zhi Huange830e682018-03-30 10:48:35 -07004724 auto dtls_role = transport_controller_->GetDtlsRole(*sctp_mid_);
4725 if (dtls_role) {
4726 *role = *dtls_role;
4727 return true;
4728 }
4729 return false;
Steve Anton75737c02017-11-06 10:37:17 -08004730}
4731
4732bool PeerConnection::GetSslRole(const std::string& content_name,
4733 rtc::SSLRole* role) {
4734 if (!local_description() || !remote_description()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004735 RTC_LOG(LS_INFO)
4736 << "Local and Remote descriptions must be applied to get the "
Jonas Olsson45cc8902018-02-13 10:37:07 +01004737 "SSL Role of the session.";
Steve Anton75737c02017-11-06 10:37:17 -08004738 return false;
4739 }
4740
Zhi Huange830e682018-03-30 10:48:35 -07004741 auto dtls_role = transport_controller_->GetDtlsRole(content_name);
4742 if (dtls_role) {
4743 *role = *dtls_role;
4744 return true;
4745 }
4746 return false;
Steve Anton75737c02017-11-06 10:37:17 -08004747}
4748
Steve Antonf8470812017-12-04 10:46:21 -08004749void PeerConnection::SetSessionError(SessionError error,
4750 const std::string& error_desc) {
4751 RTC_DCHECK_RUN_ON(signaling_thread());
4752 if (error != session_error_) {
4753 session_error_ = error;
4754 session_error_desc_ = error_desc;
Steve Anton75737c02017-11-06 10:37:17 -08004755 }
4756}
4757
Zhi Huange830e682018-03-30 10:48:35 -07004758RTCError PeerConnection::UpdateSessionState(
4759 SdpType type,
4760 cricket::ContentSource source,
4761 const cricket::SessionDescription* description) {
Steve Anton8a006912017-12-04 15:25:56 -08004762 RTC_DCHECK_RUN_ON(signaling_thread());
Steve Anton75737c02017-11-06 10:37:17 -08004763
4764 // If there's already a pending error then no state transition should happen.
4765 // But all call-sites should be verifying this before calling us!
Steve Antonf8470812017-12-04 10:46:21 -08004766 RTC_DCHECK(session_error() == SessionError::kNone);
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004767
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004768 // If this is answer-ish we're ready to let media flow.
Steve Anton3828c062017-12-06 10:34:51 -08004769 if (type == SdpType::kPrAnswer || type == SdpType::kAnswer) {
Steve Antoned10bd92017-12-05 10:52:59 -08004770 EnableSending();
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004771 }
4772
4773 // Update the signaling state according to the specified state machine (see
4774 // https://w3c.github.io/webrtc-pc/#rtcsignalingstate-enum).
Steve Anton3828c062017-12-06 10:34:51 -08004775 if (type == SdpType::kOffer) {
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004776 ChangeSignalingState(source == cricket::CS_LOCAL
4777 ? PeerConnectionInterface::kHaveLocalOffer
4778 : PeerConnectionInterface::kHaveRemoteOffer);
Steve Anton3828c062017-12-06 10:34:51 -08004779 } else if (type == SdpType::kPrAnswer) {
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004780 ChangeSignalingState(source == cricket::CS_LOCAL
4781 ? PeerConnectionInterface::kHaveLocalPrAnswer
4782 : PeerConnectionInterface::kHaveRemotePrAnswer);
4783 } else {
Steve Anton3828c062017-12-06 10:34:51 -08004784 RTC_DCHECK(type == SdpType::kAnswer);
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004785 ChangeSignalingState(PeerConnectionInterface::kStable);
4786 }
4787
4788 // Update internal objects according to the session description's media
4789 // descriptions.
Zhi Huange830e682018-03-30 10:48:35 -07004790 RTCError error = PushdownMediaDescription(type, source);
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004791 if (!error.ok()) {
Steve Anton80dd7b52018-02-16 17:08:42 -08004792 return error;
Steve Anton6d6a2ae2017-12-04 17:19:47 -08004793 }
4794
Steve Anton8a006912017-12-04 15:25:56 -08004795 return RTCError::OK();
Steve Anton75737c02017-11-06 10:37:17 -08004796}
4797
Steve Anton8a006912017-12-04 15:25:56 -08004798RTCError PeerConnection::PushdownMediaDescription(
Steve Anton3828c062017-12-06 10:34:51 -08004799 SdpType type,
Steve Anton8a006912017-12-04 15:25:56 -08004800 cricket::ContentSource source) {
Steve Antoned10bd92017-12-05 10:52:59 -08004801 const SessionDescriptionInterface* sdesc =
4802 (source == cricket::CS_LOCAL ? local_description()
4803 : remote_description());
Steve Anton75737c02017-11-06 10:37:17 -08004804 RTC_DCHECK(sdesc);
Steve Antoned10bd92017-12-05 10:52:59 -08004805
4806 // Push down the new SDP media section for each audio/video transceiver.
4807 for (auto transceiver : transceivers_) {
Steve Anton75737c02017-11-06 10:37:17 -08004808 const ContentInfo* content_info =
Steve Antoned10bd92017-12-05 10:52:59 -08004809 FindMediaSectionForTransceiver(transceiver, sdesc);
4810 cricket::BaseChannel* channel = transceiver->internal()->channel();
4811 if (!channel || !content_info || content_info->rejected) {
Steve Anton75737c02017-11-06 10:37:17 -08004812 continue;
4813 }
4814 const MediaContentDescription* content_desc =
Steve Antonb1c1de12017-12-21 15:14:30 -08004815 content_info->media_description();
Steve Antoned10bd92017-12-05 10:52:59 -08004816 if (!content_desc) {
4817 continue;
4818 }
4819 std::string error;
4820 bool success =
4821 (source == cricket::CS_LOCAL)
Steve Anton3828c062017-12-06 10:34:51 -08004822 ? channel->SetLocalContent(content_desc, type, &error)
4823 : channel->SetRemoteContent(content_desc, type, &error);
Steve Antoned10bd92017-12-05 10:52:59 -08004824 if (!success) {
4825 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, std::move(error));
4826 }
4827 }
4828
4829 // If using the RtpDataChannel, push down the new SDP section for it too.
4830 if (rtp_data_channel_) {
4831 const ContentInfo* data_content =
4832 cricket::GetFirstDataContent(sdesc->description());
4833 if (data_content && !data_content->rejected) {
4834 const MediaContentDescription* data_desc =
Steve Antonb1c1de12017-12-21 15:14:30 -08004835 data_content->media_description();
Steve Antoned10bd92017-12-05 10:52:59 -08004836 if (data_desc) {
4837 std::string error;
4838 bool success =
4839 (source == cricket::CS_LOCAL)
Steve Anton3828c062017-12-06 10:34:51 -08004840 ? rtp_data_channel_->SetLocalContent(data_desc, type, &error)
4841 : rtp_data_channel_->SetRemoteContent(data_desc, type,
Steve Antoned10bd92017-12-05 10:52:59 -08004842 &error);
4843 if (!success) {
4844 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
4845 std::move(error));
4846 }
Steve Anton75737c02017-11-06 10:37:17 -08004847 }
4848 }
4849 }
Steve Antoned10bd92017-12-05 10:52:59 -08004850
Steve Anton75737c02017-11-06 10:37:17 -08004851 // Need complete offer/answer with an SCTP m= section before starting SCTP,
4852 // according to https://tools.ietf.org/html/draft-ietf-mmusic-sctp-sdp-19
4853 if (sctp_transport_ && local_description() && remote_description() &&
4854 cricket::GetFirstDataContent(local_description()->description()) &&
4855 cricket::GetFirstDataContent(remote_description()->description())) {
Steve Anton8a006912017-12-04 15:25:56 -08004856 bool success = network_thread()->Invoke<bool>(
Steve Anton75737c02017-11-06 10:37:17 -08004857 RTC_FROM_HERE,
4858 rtc::Bind(&PeerConnection::PushdownSctpParameters_n, this, source));
Steve Anton8a006912017-12-04 15:25:56 -08004859 if (!success) {
4860 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
4861 "Failed to push down SCTP parameters.");
4862 }
Steve Anton75737c02017-11-06 10:37:17 -08004863 }
Steve Antoned10bd92017-12-05 10:52:59 -08004864
Steve Anton8a006912017-12-04 15:25:56 -08004865 return RTCError::OK();
Steve Anton75737c02017-11-06 10:37:17 -08004866}
4867
4868bool PeerConnection::PushdownSctpParameters_n(cricket::ContentSource source) {
4869 RTC_DCHECK(network_thread()->IsCurrent());
4870 RTC_DCHECK(local_description());
4871 RTC_DCHECK(remote_description());
4872 // Apply the SCTP port (which is hidden inside a DataCodec structure...)
4873 // When we support "max-message-size", that would also be pushed down here.
4874 return sctp_transport_->Start(
4875 GetSctpPort(local_description()->description()),
4876 GetSctpPort(remote_description()->description()));
4877}
4878
Steve Anton8a006912017-12-04 15:25:56 -08004879RTCError PeerConnection::PushdownTransportDescription(
4880 cricket::ContentSource source,
Steve Anton3828c062017-12-06 10:34:51 -08004881 SdpType type) {
Steve Anton8a006912017-12-04 15:25:56 -08004882 RTC_DCHECK_RUN_ON(signaling_thread());
Steve Anton75737c02017-11-06 10:37:17 -08004883
Zhi Huange830e682018-03-30 10:48:35 -07004884 if (source == cricket::CS_LOCAL) {
4885 const SessionDescriptionInterface* sdesc = local_description();
4886 RTC_DCHECK(sdesc);
4887 return transport_controller_->SetLocalDescription(type,
4888 sdesc->description());
4889 } else {
4890 const SessionDescriptionInterface* sdesc = remote_description();
4891 RTC_DCHECK(sdesc);
4892 return transport_controller_->SetRemoteDescription(type,
4893 sdesc->description());
Steve Anton75737c02017-11-06 10:37:17 -08004894 }
Steve Anton75737c02017-11-06 10:37:17 -08004895}
4896
4897bool PeerConnection::GetTransportDescription(
4898 const SessionDescription* description,
4899 const std::string& content_name,
4900 cricket::TransportDescription* tdesc) {
4901 if (!description || !tdesc) {
4902 return false;
4903 }
4904 const TransportInfo* transport_info =
4905 description->GetTransportInfoByName(content_name);
4906 if (!transport_info) {
4907 return false;
4908 }
4909 *tdesc = transport_info->description;
4910 return true;
4911}
4912
Steve Anton75737c02017-11-06 10:37:17 -08004913cricket::IceConfig PeerConnection::ParseIceConfig(
4914 const PeerConnectionInterface::RTCConfiguration& config) const {
4915 cricket::ContinualGatheringPolicy gathering_policy;
4916 // TODO(honghaiz): Add the third continual gathering policy in
4917 // PeerConnectionInterface and map it to GATHER_CONTINUALLY_AND_RECOVER.
4918 switch (config.continual_gathering_policy) {
4919 case PeerConnectionInterface::GATHER_ONCE:
4920 gathering_policy = cricket::GATHER_ONCE;
4921 break;
4922 case PeerConnectionInterface::GATHER_CONTINUALLY:
4923 gathering_policy = cricket::GATHER_CONTINUALLY;
4924 break;
4925 default:
4926 RTC_NOTREACHED();
4927 gathering_policy = cricket::GATHER_ONCE;
4928 }
Qingsi Wang9a5c6f82018-02-01 10:38:40 -08004929
Steve Anton75737c02017-11-06 10:37:17 -08004930 cricket::IceConfig ice_config;
Qingsi Wang866e08d2018-03-22 17:54:23 -07004931 ice_config.receiving_timeout = RTCConfigurationToIceConfigOptionalInt(
4932 config.ice_connection_receiving_timeout);
Steve Anton75737c02017-11-06 10:37:17 -08004933 ice_config.prioritize_most_likely_candidate_pairs =
4934 config.prioritize_most_likely_ice_candidate_pairs;
4935 ice_config.backup_connection_ping_interval =
Qingsi Wang866e08d2018-03-22 17:54:23 -07004936 RTCConfigurationToIceConfigOptionalInt(
4937 config.ice_backup_candidate_pair_ping_interval);
Steve Anton75737c02017-11-06 10:37:17 -08004938 ice_config.continual_gathering_policy = gathering_policy;
4939 ice_config.presume_writable_when_fully_relayed =
4940 config.presume_writable_when_fully_relayed;
Qingsi Wange6826d22018-03-08 14:55:14 -08004941 ice_config.ice_check_interval_strong_connectivity =
4942 config.ice_check_interval_strong_connectivity;
4943 ice_config.ice_check_interval_weak_connectivity =
4944 config.ice_check_interval_weak_connectivity;
Steve Anton75737c02017-11-06 10:37:17 -08004945 ice_config.ice_check_min_interval = config.ice_check_min_interval;
Qingsi Wangdb53f8e2018-02-20 14:45:49 -08004946 ice_config.stun_keepalive_interval = config.stun_candidate_keepalive_interval;
Steve Anton75737c02017-11-06 10:37:17 -08004947 ice_config.regather_all_networks_interval_range =
4948 config.ice_regather_interval_range;
Qingsi Wang9a5c6f82018-02-01 10:38:40 -08004949 ice_config.network_preference = config.network_preference;
Steve Anton75737c02017-11-06 10:37:17 -08004950 return ice_config;
4951}
4952
Steve Anton75737c02017-11-06 10:37:17 -08004953bool PeerConnection::GetLocalTrackIdBySsrc(uint32_t ssrc,
4954 std::string* track_id) {
4955 if (!local_description()) {
4956 return false;
4957 }
4958 return webrtc::GetTrackIdBySsrc(local_description()->description(), ssrc,
4959 track_id);
4960}
4961
4962bool PeerConnection::GetRemoteTrackIdBySsrc(uint32_t ssrc,
4963 std::string* track_id) {
4964 if (!remote_description()) {
4965 return false;
4966 }
4967 return webrtc::GetTrackIdBySsrc(remote_description()->description(), ssrc,
4968 track_id);
4969}
4970
4971bool PeerConnection::SendData(const cricket::SendDataParams& params,
4972 const rtc::CopyOnWriteBuffer& payload,
4973 cricket::SendDataResult* result) {
4974 if (!rtp_data_channel_ && !sctp_transport_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01004975 RTC_LOG(LS_ERROR) << "SendData called when rtp_data_channel_ "
Jonas Olsson45cc8902018-02-13 10:37:07 +01004976 "and sctp_transport_ are NULL.";
Steve Anton75737c02017-11-06 10:37:17 -08004977 return false;
4978 }
4979 return rtp_data_channel_
4980 ? rtp_data_channel_->SendData(params, payload, result)
4981 : network_thread()->Invoke<bool>(
4982 RTC_FROM_HERE,
4983 Bind(&cricket::SctpTransportInternal::SendData,
4984 sctp_transport_.get(), params, payload, result));
4985}
4986
4987bool PeerConnection::ConnectDataChannel(DataChannel* webrtc_data_channel) {
4988 if (!rtp_data_channel_ && !sctp_transport_) {
4989 // Don't log an error here, because DataChannels are expected to call
4990 // ConnectDataChannel in this state. It's the only way to initially tell
4991 // whether or not the underlying transport is ready.
4992 return false;
4993 }
4994 if (rtp_data_channel_) {
4995 rtp_data_channel_->SignalReadyToSendData.connect(
4996 webrtc_data_channel, &DataChannel::OnChannelReady);
4997 rtp_data_channel_->SignalDataReceived.connect(webrtc_data_channel,
4998 &DataChannel::OnDataReceived);
4999 } else {
5000 SignalSctpReadyToSendData.connect(webrtc_data_channel,
5001 &DataChannel::OnChannelReady);
5002 SignalSctpDataReceived.connect(webrtc_data_channel,
5003 &DataChannel::OnDataReceived);
5004 SignalSctpStreamClosedRemotely.connect(
5005 webrtc_data_channel, &DataChannel::OnStreamClosedRemotely);
5006 }
5007 return true;
5008}
5009
5010void PeerConnection::DisconnectDataChannel(DataChannel* webrtc_data_channel) {
5011 if (!rtp_data_channel_ && !sctp_transport_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005012 RTC_LOG(LS_ERROR)
5013 << "DisconnectDataChannel called when rtp_data_channel_ and "
5014 "sctp_transport_ are NULL.";
Steve Anton75737c02017-11-06 10:37:17 -08005015 return;
5016 }
5017 if (rtp_data_channel_) {
5018 rtp_data_channel_->SignalReadyToSendData.disconnect(webrtc_data_channel);
5019 rtp_data_channel_->SignalDataReceived.disconnect(webrtc_data_channel);
5020 } else {
5021 SignalSctpReadyToSendData.disconnect(webrtc_data_channel);
5022 SignalSctpDataReceived.disconnect(webrtc_data_channel);
5023 SignalSctpStreamClosedRemotely.disconnect(webrtc_data_channel);
5024 }
5025}
5026
5027void PeerConnection::AddSctpDataStream(int sid) {
5028 if (!sctp_transport_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005029 RTC_LOG(LS_ERROR)
5030 << "AddSctpDataStream called when sctp_transport_ is NULL.";
Steve Anton75737c02017-11-06 10:37:17 -08005031 return;
5032 }
5033 network_thread()->Invoke<void>(
5034 RTC_FROM_HERE, rtc::Bind(&cricket::SctpTransportInternal::OpenStream,
5035 sctp_transport_.get(), sid));
5036}
5037
5038void PeerConnection::RemoveSctpDataStream(int sid) {
5039 if (!sctp_transport_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005040 RTC_LOG(LS_ERROR) << "RemoveSctpDataStream called when sctp_transport_ is "
Jonas Olsson45cc8902018-02-13 10:37:07 +01005041 "NULL.";
Steve Anton75737c02017-11-06 10:37:17 -08005042 return;
5043 }
5044 network_thread()->Invoke<void>(
5045 RTC_FROM_HERE, rtc::Bind(&cricket::SctpTransportInternal::ResetStream,
5046 sctp_transport_.get(), sid));
5047}
5048
5049bool PeerConnection::ReadyToSendData() const {
5050 return (rtp_data_channel_ && rtp_data_channel_->ready_to_send_data()) ||
5051 sctp_ready_to_send_data_;
5052}
5053
Zhi Huange830e682018-03-30 10:48:35 -07005054rtc::Optional<std::string> PeerConnection::sctp_transport_name() const {
5055 if (sctp_mid_ && transport_controller_) {
5056 auto dtls_transport = transport_controller_->GetDtlsTransport(*sctp_mid_);
5057 if (dtls_transport) {
5058 return dtls_transport->transport_name();
5059 }
5060 return rtc::Optional<std::string>();
5061 }
5062 return rtc::Optional<std::string>();
5063}
5064
Qingsi Wang72a43a12018-02-20 16:03:18 -08005065cricket::CandidateStatsList PeerConnection::GetPooledCandidateStats() const {
5066 cricket::CandidateStatsList candidate_states_list;
Qingsi Wanga2d60672018-04-11 16:57:45 -07005067 network_thread()->Invoke<void>(
5068 RTC_FROM_HERE,
5069 rtc::Bind(&cricket::PortAllocator::GetCandidateStatsFromPooledSessions,
5070 port_allocator_.get(), &candidate_states_list));
Qingsi Wang72a43a12018-02-20 16:03:18 -08005071 return candidate_states_list;
5072}
5073
Steve Anton5dfde182018-02-06 10:34:40 -08005074std::map<std::string, std::string> PeerConnection::GetTransportNamesByMid()
5075 const {
5076 std::map<std::string, std::string> transport_names_by_mid;
5077 for (auto transceiver : transceivers_) {
5078 cricket::BaseChannel* channel = transceiver->internal()->channel();
5079 if (channel) {
5080 transport_names_by_mid[channel->content_name()] =
5081 channel->transport_name();
5082 }
Steve Anton75737c02017-11-06 10:37:17 -08005083 }
Steve Anton5dfde182018-02-06 10:34:40 -08005084 if (rtp_data_channel_) {
5085 transport_names_by_mid[rtp_data_channel_->content_name()] =
5086 rtp_data_channel_->transport_name();
Steve Anton75737c02017-11-06 10:37:17 -08005087 }
5088 if (sctp_transport_) {
Zhi Huange830e682018-03-30 10:48:35 -07005089 rtc::Optional<std::string> transport_name = sctp_transport_name();
5090 RTC_DCHECK(transport_name);
5091 transport_names_by_mid[*sctp_mid_] = *transport_name;
Steve Anton75737c02017-11-06 10:37:17 -08005092 }
Steve Anton5dfde182018-02-06 10:34:40 -08005093 return transport_names_by_mid;
Steve Anton75737c02017-11-06 10:37:17 -08005094}
5095
Steve Anton5dfde182018-02-06 10:34:40 -08005096std::map<std::string, cricket::TransportStats>
5097PeerConnection::GetTransportStatsByNames(
5098 const std::set<std::string>& transport_names) {
5099 if (!network_thread()->IsCurrent()) {
5100 return network_thread()
5101 ->Invoke<std::map<std::string, cricket::TransportStats>>(
5102 RTC_FROM_HERE,
5103 [&] { return GetTransportStatsByNames(transport_names); });
Steve Anton75737c02017-11-06 10:37:17 -08005104 }
Steve Anton5dfde182018-02-06 10:34:40 -08005105 std::map<std::string, cricket::TransportStats> transport_stats_by_name;
5106 for (const std::string& transport_name : transport_names) {
5107 cricket::TransportStats transport_stats;
5108 bool success =
5109 transport_controller_->GetStats(transport_name, &transport_stats);
5110 if (success) {
5111 transport_stats_by_name[transport_name] = std::move(transport_stats);
5112 } else {
5113 RTC_LOG(LS_ERROR) << "Failed to get transport stats for transport_name="
5114 << transport_name;
5115 }
5116 }
5117 return transport_stats_by_name;
Steve Anton75737c02017-11-06 10:37:17 -08005118}
5119
5120bool PeerConnection::GetLocalCertificate(
5121 const std::string& transport_name,
5122 rtc::scoped_refptr<rtc::RTCCertificate>* certificate) {
Zhi Huange830e682018-03-30 10:48:35 -07005123 if (!certificate) {
5124 return false;
5125 }
5126 *certificate = transport_controller_->GetLocalCertificate(transport_name);
5127 return *certificate != nullptr;
Steve Anton75737c02017-11-06 10:37:17 -08005128}
5129
Taylor Brandstetterc3928662018-02-23 13:04:51 -08005130std::unique_ptr<rtc::SSLCertChain> PeerConnection::GetRemoteSSLCertChain(
Steve Anton75737c02017-11-06 10:37:17 -08005131 const std::string& transport_name) {
Taylor Brandstetterc3928662018-02-23 13:04:51 -08005132 return transport_controller_->GetRemoteSSLCertChain(transport_name);
Steve Anton75737c02017-11-06 10:37:17 -08005133}
5134
5135cricket::DataChannelType PeerConnection::data_channel_type() const {
5136 return data_channel_type_;
5137}
5138
5139bool PeerConnection::IceRestartPending(const std::string& content_name) const {
5140 return pending_ice_restarts_.find(content_name) !=
5141 pending_ice_restarts_.end();
5142}
5143
Steve Anton75737c02017-11-06 10:37:17 -08005144bool PeerConnection::NeedsIceRestart(const std::string& content_name) const {
5145 return transport_controller_->NeedsIceRestart(content_name);
5146}
5147
5148void PeerConnection::OnCertificateReady(
5149 const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) {
5150 transport_controller_->SetLocalCertificate(certificate);
5151}
5152
5153void PeerConnection::OnDtlsSrtpSetupFailure(cricket::BaseChannel*, bool rtcp) {
Steve Antonf8470812017-12-04 10:46:21 -08005154 SetSessionError(SessionError::kTransport,
5155 rtcp ? kDtlsSrtpSetupFailureRtcp : kDtlsSrtpSetupFailureRtp);
Steve Anton75737c02017-11-06 10:37:17 -08005156}
5157
5158void PeerConnection::OnTransportControllerConnectionState(
5159 cricket::IceConnectionState state) {
5160 switch (state) {
5161 case cricket::kIceConnectionConnecting:
5162 // If the current state is Connected or Completed, then there were
5163 // writable channels but now there are not, so the next state must
5164 // be Disconnected.
5165 // kIceConnectionConnecting is currently used as the default,
5166 // un-connected state by the TransportController, so its only use is
5167 // detecting disconnections.
5168 if (ice_connection_state_ ==
5169 PeerConnectionInterface::kIceConnectionConnected ||
5170 ice_connection_state_ ==
5171 PeerConnectionInterface::kIceConnectionCompleted) {
5172 SetIceConnectionState(
5173 PeerConnectionInterface::kIceConnectionDisconnected);
5174 }
5175 break;
5176 case cricket::kIceConnectionFailed:
5177 SetIceConnectionState(PeerConnectionInterface::kIceConnectionFailed);
5178 break;
5179 case cricket::kIceConnectionConnected:
Mirko Bonadei675513b2017-11-09 11:09:25 +01005180 RTC_LOG(LS_INFO) << "Changing to ICE connected state because "
Jonas Olsson45cc8902018-02-13 10:37:07 +01005181 "all transports are writable.";
Steve Anton75737c02017-11-06 10:37:17 -08005182 SetIceConnectionState(PeerConnectionInterface::kIceConnectionConnected);
5183 break;
5184 case cricket::kIceConnectionCompleted:
Mirko Bonadei675513b2017-11-09 11:09:25 +01005185 RTC_LOG(LS_INFO) << "Changing to ICE completed state because "
Jonas Olsson45cc8902018-02-13 10:37:07 +01005186 "all transports are complete.";
Steve Anton75737c02017-11-06 10:37:17 -08005187 if (ice_connection_state_ !=
5188 PeerConnectionInterface::kIceConnectionConnected) {
5189 // If jumping directly from "checking" to "connected",
5190 // signal "connected" first.
5191 SetIceConnectionState(PeerConnectionInterface::kIceConnectionConnected);
5192 }
5193 SetIceConnectionState(PeerConnectionInterface::kIceConnectionCompleted);
5194 if (metrics_observer()) {
5195 ReportTransportStats();
5196 }
5197 break;
5198 default:
5199 RTC_NOTREACHED();
5200 }
5201}
5202
5203void PeerConnection::OnTransportControllerCandidatesGathered(
5204 const std::string& transport_name,
5205 const cricket::Candidates& candidates) {
5206 RTC_DCHECK(signaling_thread()->IsCurrent());
5207 int sdp_mline_index;
5208 if (!GetLocalCandidateMediaIndex(transport_name, &sdp_mline_index)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005209 RTC_LOG(LS_ERROR)
5210 << "OnTransportControllerCandidatesGathered: content name "
5211 << transport_name << " not found";
Steve Anton75737c02017-11-06 10:37:17 -08005212 return;
5213 }
5214
5215 for (cricket::Candidates::const_iterator citer = candidates.begin();
5216 citer != candidates.end(); ++citer) {
5217 // Use transport_name as the candidate media id.
5218 std::unique_ptr<JsepIceCandidate> candidate(
5219 new JsepIceCandidate(transport_name, sdp_mline_index, *citer));
5220 if (local_description()) {
5221 mutable_local_description()->AddCandidate(candidate.get());
5222 }
5223 OnIceCandidate(std::move(candidate));
5224 }
5225}
5226
5227void PeerConnection::OnTransportControllerCandidatesRemoved(
5228 const std::vector<cricket::Candidate>& candidates) {
5229 RTC_DCHECK(signaling_thread()->IsCurrent());
5230 // Sanity check.
5231 for (const cricket::Candidate& candidate : candidates) {
5232 if (candidate.transport_name().empty()) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005233 RTC_LOG(LS_ERROR) << "OnTransportControllerCandidatesRemoved: "
Jonas Olsson45cc8902018-02-13 10:37:07 +01005234 "empty content name in candidate "
Mirko Bonadei675513b2017-11-09 11:09:25 +01005235 << candidate.ToString();
Steve Anton75737c02017-11-06 10:37:17 -08005236 return;
5237 }
5238 }
5239
5240 if (local_description()) {
5241 mutable_local_description()->RemoveCandidates(candidates);
5242 }
5243 OnIceCandidatesRemoved(candidates);
5244}
5245
5246void PeerConnection::OnTransportControllerDtlsHandshakeError(
5247 rtc::SSLHandshakeError error) {
5248 if (metrics_observer()) {
5249 metrics_observer()->IncrementEnumCounter(
5250 webrtc::kEnumCounterDtlsHandshakeError, static_cast<int>(error),
5251 static_cast<int>(rtc::SSLHandshakeError::MAX_VALUE));
5252 }
5253}
5254
Steve Antoned10bd92017-12-05 10:52:59 -08005255void PeerConnection::EnableSending() {
5256 for (auto transceiver : transceivers_) {
5257 cricket::BaseChannel* channel = transceiver->internal()->channel();
5258 if (channel && !channel->enabled()) {
5259 channel->Enable(true);
5260 }
Steve Anton75737c02017-11-06 10:37:17 -08005261 }
5262
Steve Anton4171afb2017-11-20 10:20:22 -08005263 if (rtp_data_channel_ && !rtp_data_channel_->enabled()) {
Steve Anton75737c02017-11-06 10:37:17 -08005264 rtp_data_channel_->Enable(true);
Steve Anton4171afb2017-11-20 10:20:22 -08005265 }
Steve Anton75737c02017-11-06 10:37:17 -08005266}
5267
5268// Returns the media index for a local ice candidate given the content name.
5269bool PeerConnection::GetLocalCandidateMediaIndex(
5270 const std::string& content_name,
5271 int* sdp_mline_index) {
5272 if (!local_description() || !sdp_mline_index) {
5273 return false;
5274 }
5275
5276 bool content_found = false;
5277 const ContentInfos& contents = local_description()->description()->contents();
5278 for (size_t index = 0; index < contents.size(); ++index) {
5279 if (contents[index].name == content_name) {
5280 *sdp_mline_index = static_cast<int>(index);
5281 content_found = true;
5282 break;
5283 }
5284 }
5285 return content_found;
5286}
5287
5288bool PeerConnection::UseCandidatesInSessionDescription(
5289 const SessionDescriptionInterface* remote_desc) {
5290 if (!remote_desc) {
5291 return true;
5292 }
5293 bool ret = true;
5294
5295 for (size_t m = 0; m < remote_desc->number_of_mediasections(); ++m) {
5296 const IceCandidateCollection* candidates = remote_desc->candidates(m);
5297 for (size_t n = 0; n < candidates->count(); ++n) {
5298 const IceCandidateInterface* candidate = candidates->at(n);
5299 bool valid = false;
5300 if (!ReadyToUseRemoteCandidate(candidate, remote_desc, &valid)) {
5301 if (valid) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005302 RTC_LOG(LS_INFO)
5303 << "UseCandidatesInSessionDescription: Not ready to use "
Jonas Olsson45cc8902018-02-13 10:37:07 +01005304 "candidate.";
Steve Anton75737c02017-11-06 10:37:17 -08005305 }
5306 continue;
5307 }
5308 ret = UseCandidate(candidate);
5309 if (!ret) {
5310 break;
5311 }
5312 }
5313 }
5314 return ret;
5315}
5316
5317bool PeerConnection::UseCandidate(const IceCandidateInterface* candidate) {
5318 size_t mediacontent_index = static_cast<size_t>(candidate->sdp_mline_index());
5319 size_t remote_content_size =
5320 remote_description()->description()->contents().size();
5321 if (mediacontent_index >= remote_content_size) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005322 RTC_LOG(LS_ERROR) << "UseCandidate: Invalid candidate media index.";
Steve Anton75737c02017-11-06 10:37:17 -08005323 return false;
5324 }
5325
5326 cricket::ContentInfo content =
5327 remote_description()->description()->contents()[mediacontent_index];
5328 std::vector<cricket::Candidate> candidates;
5329 candidates.push_back(candidate->candidate());
5330 // Invoking BaseSession method to handle remote candidates.
Zhi Huange830e682018-03-30 10:48:35 -07005331 RTCError error =
5332 transport_controller_->AddRemoteCandidates(content.name, candidates);
Henrik Boström5d8f8fa2018-04-13 15:22:50 +00005333 if (error.ok()) {
5334 // Candidates successfully submitted for checking.
5335 if (ice_connection_state_ == PeerConnectionInterface::kIceConnectionNew ||
5336 ice_connection_state_ ==
5337 PeerConnectionInterface::kIceConnectionDisconnected) {
5338 // If state is New, then the session has just gotten its first remote ICE
5339 // candidates, so go to Checking.
5340 // If state is Disconnected, the session is re-using old candidates or
5341 // receiving additional ones, so go to Checking.
5342 // If state is Connected, stay Connected.
5343 // TODO(bemasc): If state is Connected, and the new candidates are for a
5344 // newly added transport, then the state actually _should_ move to
5345 // checking. Add a way to distinguish that case.
5346 SetIceConnectionState(PeerConnectionInterface::kIceConnectionChecking);
5347 }
5348 // TODO(bemasc): If state is Completed, go back to Connected.
5349 } else if (error.message()) {
Zhi Huange830e682018-03-30 10:48:35 -07005350 RTC_LOG(LS_WARNING) << error.message();
Steve Anton75737c02017-11-06 10:37:17 -08005351 }
5352 return true;
5353}
5354
5355void PeerConnection::RemoveUnusedChannels(const SessionDescription* desc) {
Steve Anton75737c02017-11-06 10:37:17 -08005356 // Destroy video channel first since it may have a pointer to the
5357 // voice channel.
5358 const cricket::ContentInfo* video_info = cricket::GetFirstVideoContent(desc);
Steve Anton6fec8802017-12-04 10:37:29 -08005359 if (!video_info || video_info->rejected) {
5360 DestroyTransceiverChannel(GetVideoTransceiver());
Steve Anton75737c02017-11-06 10:37:17 -08005361 }
5362
Steve Anton6fec8802017-12-04 10:37:29 -08005363 const cricket::ContentInfo* audio_info = cricket::GetFirstAudioContent(desc);
5364 if (!audio_info || audio_info->rejected) {
5365 DestroyTransceiverChannel(GetAudioTransceiver());
Steve Anton75737c02017-11-06 10:37:17 -08005366 }
5367
5368 const cricket::ContentInfo* data_info = cricket::GetFirstDataContent(desc);
5369 if (!data_info || data_info->rejected) {
Steve Anton6fec8802017-12-04 10:37:29 -08005370 DestroyDataChannel();
Steve Anton75737c02017-11-06 10:37:17 -08005371 }
5372}
5373
Steve Antondcc3c022017-12-22 16:02:54 -08005374RTCErrorOr<const cricket::ContentGroup*> PeerConnection::GetEarlyBundleGroup(
5375 const SessionDescription& desc) const {
Steve Anton75737c02017-11-06 10:37:17 -08005376 const cricket::ContentGroup* bundle_group = nullptr;
5377 if (configuration_.bundle_policy ==
5378 PeerConnectionInterface::kBundlePolicyMaxBundle) {
Steve Antondcc3c022017-12-22 16:02:54 -08005379 bundle_group = desc.GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
Steve Anton75737c02017-11-06 10:37:17 -08005380 if (!bundle_group) {
Steve Anton8a006912017-12-04 15:25:56 -08005381 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5382 "max-bundle configured but session description "
5383 "has no BUNDLE group");
Steve Anton75737c02017-11-06 10:37:17 -08005384 }
5385 }
Steve Antondcc3c022017-12-22 16:02:54 -08005386 return std::move(bundle_group);
5387}
5388
5389RTCError PeerConnection::CreateChannels(const SessionDescription& desc) {
Zhi Huange830e682018-03-30 10:48:35 -07005390 // Creating the media channels. Transports should already have been created
5391 // at this point.
Steve Antondcc3c022017-12-22 16:02:54 -08005392 const cricket::ContentInfo* voice = cricket::GetFirstAudioContent(&desc);
Steve Antoneda6ccd2017-12-04 10:21:55 -08005393 if (voice && !voice->rejected &&
5394 !GetAudioTransceiver()->internal()->channel()) {
Zhi Huange830e682018-03-30 10:48:35 -07005395 cricket::VoiceChannel* voice_channel = CreateVoiceChannel(voice->name);
Steve Antoneda6ccd2017-12-04 10:21:55 -08005396 if (!voice_channel) {
Steve Anton8a006912017-12-04 15:25:56 -08005397 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
5398 "Failed to create voice channel.");
Steve Antoneda6ccd2017-12-04 10:21:55 -08005399 }
5400 GetAudioTransceiver()->internal()->SetChannel(voice_channel);
5401 }
5402
Steve Antondcc3c022017-12-22 16:02:54 -08005403 const cricket::ContentInfo* video = cricket::GetFirstVideoContent(&desc);
Steve Antoneda6ccd2017-12-04 10:21:55 -08005404 if (video && !video->rejected &&
5405 !GetVideoTransceiver()->internal()->channel()) {
Zhi Huange830e682018-03-30 10:48:35 -07005406 cricket::VideoChannel* video_channel = CreateVideoChannel(video->name);
Steve Antoneda6ccd2017-12-04 10:21:55 -08005407 if (!video_channel) {
Steve Anton8a006912017-12-04 15:25:56 -08005408 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
5409 "Failed to create video channel.");
Steve Anton75737c02017-11-06 10:37:17 -08005410 }
Steve Antoneda6ccd2017-12-04 10:21:55 -08005411 GetVideoTransceiver()->internal()->SetChannel(video_channel);
Steve Anton75737c02017-11-06 10:37:17 -08005412 }
5413
Steve Antondcc3c022017-12-22 16:02:54 -08005414 const cricket::ContentInfo* data = cricket::GetFirstDataContent(&desc);
Steve Anton75737c02017-11-06 10:37:17 -08005415 if (data_channel_type_ != cricket::DCT_NONE && data && !data->rejected &&
5416 !rtp_data_channel_ && !sctp_transport_) {
Zhi Huange830e682018-03-30 10:48:35 -07005417 if (!CreateDataChannel(data->name)) {
Steve Anton8a006912017-12-04 15:25:56 -08005418 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR,
5419 "Failed to create data channel.");
Steve Anton75737c02017-11-06 10:37:17 -08005420 }
5421 }
5422
Steve Anton8a006912017-12-04 15:25:56 -08005423 return RTCError::OK();
Steve Anton75737c02017-11-06 10:37:17 -08005424}
5425
Steve Anton4171afb2017-11-20 10:20:22 -08005426// TODO(steveanton): Perhaps this should be managed by the RtpTransceiver.
Steve Antoneda6ccd2017-12-04 10:21:55 -08005427cricket::VoiceChannel* PeerConnection::CreateVoiceChannel(
Zhi Huange830e682018-03-30 10:48:35 -07005428 const std::string& mid) {
5429 RtpTransportInternal* rtp_transport =
5430 transport_controller_->GetRtpTransport(mid);
5431 RTC_DCHECK(rtp_transport);
Steve Anton75737c02017-11-06 10:37:17 -08005432 cricket::VoiceChannel* voice_channel = channel_manager()->CreateVoiceChannel(
Zhi Huange830e682018-03-30 10:48:35 -07005433 call_.get(), configuration_.media_config, rtp_transport,
5434 signaling_thread(), mid, SrtpRequired(),
5435 factory_->options().crypto_options, audio_options_);
Steve Anton75737c02017-11-06 10:37:17 -08005436 if (!voice_channel) {
Steve Antoneda6ccd2017-12-04 10:21:55 -08005437 return nullptr;
Steve Anton75737c02017-11-06 10:37:17 -08005438 }
Steve Anton75737c02017-11-06 10:37:17 -08005439 voice_channel->SignalDtlsSrtpSetupFailure.connect(
5440 this, &PeerConnection::OnDtlsSrtpSetupFailure);
Steve Anton75737c02017-11-06 10:37:17 -08005441 voice_channel->SignalSentPacket.connect(this,
5442 &PeerConnection::OnSentPacket_w);
Zhi Huange830e682018-03-30 10:48:35 -07005443 voice_channel->SetRtpTransport(rtp_transport);
Steve Antondb67ba12018-03-19 17:41:42 -07005444 if (uma_observer_) {
5445 voice_channel->SetMetricsObserver(uma_observer_);
5446 }
Steve Anton4171afb2017-11-20 10:20:22 -08005447
Steve Antoneda6ccd2017-12-04 10:21:55 -08005448 return voice_channel;
Steve Anton75737c02017-11-06 10:37:17 -08005449}
5450
Steve Anton4171afb2017-11-20 10:20:22 -08005451// TODO(steveanton): Perhaps this should be managed by the RtpTransceiver.
Steve Antoneda6ccd2017-12-04 10:21:55 -08005452cricket::VideoChannel* PeerConnection::CreateVideoChannel(
Zhi Huange830e682018-03-30 10:48:35 -07005453 const std::string& mid) {
5454 RtpTransportInternal* rtp_transport =
5455 transport_controller_->GetRtpTransport(mid);
5456 RTC_DCHECK(rtp_transport);
Steve Anton75737c02017-11-06 10:37:17 -08005457 cricket::VideoChannel* video_channel = channel_manager()->CreateVideoChannel(
Zhi Huange830e682018-03-30 10:48:35 -07005458 call_.get(), configuration_.media_config, rtp_transport,
5459 signaling_thread(), mid, SrtpRequired(),
5460 factory_->options().crypto_options, video_options_);
Steve Anton75737c02017-11-06 10:37:17 -08005461 if (!video_channel) {
Steve Antoneda6ccd2017-12-04 10:21:55 -08005462 return nullptr;
Steve Anton75737c02017-11-06 10:37:17 -08005463 }
Steve Anton75737c02017-11-06 10:37:17 -08005464 video_channel->SignalDtlsSrtpSetupFailure.connect(
5465 this, &PeerConnection::OnDtlsSrtpSetupFailure);
Steve Anton75737c02017-11-06 10:37:17 -08005466 video_channel->SignalSentPacket.connect(this,
5467 &PeerConnection::OnSentPacket_w);
Zhi Huange830e682018-03-30 10:48:35 -07005468 video_channel->SetRtpTransport(rtp_transport);
Steve Antondb67ba12018-03-19 17:41:42 -07005469 if (uma_observer_) {
5470 video_channel->SetMetricsObserver(uma_observer_);
5471 }
Steve Anton4171afb2017-11-20 10:20:22 -08005472
Steve Antoneda6ccd2017-12-04 10:21:55 -08005473 return video_channel;
Steve Anton75737c02017-11-06 10:37:17 -08005474}
5475
Zhi Huange830e682018-03-30 10:48:35 -07005476bool PeerConnection::CreateDataChannel(const std::string& mid) {
Steve Anton75737c02017-11-06 10:37:17 -08005477 bool sctp = (data_channel_type_ == cricket::DCT_SCTP);
5478 if (sctp) {
5479 if (!sctp_factory_) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005480 RTC_LOG(LS_ERROR)
Steve Anton75737c02017-11-06 10:37:17 -08005481 << "Trying to create SCTP transport, but didn't compile with "
5482 "SCTP support (HAVE_SCTP)";
5483 return false;
5484 }
5485 if (!network_thread()->Invoke<bool>(
Zhi Huange830e682018-03-30 10:48:35 -07005486 RTC_FROM_HERE,
5487 rtc::Bind(&PeerConnection::CreateSctpTransport_n, this, mid))) {
Steve Anton75737c02017-11-06 10:37:17 -08005488 return false;
5489 }
Steve Antoneda6ccd2017-12-04 10:21:55 -08005490 for (const auto& channel : sctp_data_channels_) {
5491 channel->OnTransportChannelCreated();
5492 }
Steve Anton75737c02017-11-06 10:37:17 -08005493 } else {
Zhi Huange830e682018-03-30 10:48:35 -07005494 RtpTransportInternal* rtp_transport =
5495 transport_controller_->GetRtpTransport(mid);
5496 RTC_DCHECK(rtp_transport);
Steve Anton75737c02017-11-06 10:37:17 -08005497 rtp_data_channel_ = channel_manager()->CreateRtpDataChannel(
Zhi Huange830e682018-03-30 10:48:35 -07005498 configuration_.media_config, rtp_transport, signaling_thread(), mid,
5499 SrtpRequired(), factory_->options().crypto_options);
Steve Anton75737c02017-11-06 10:37:17 -08005500 if (!rtp_data_channel_) {
Steve Anton75737c02017-11-06 10:37:17 -08005501 return false;
5502 }
Steve Anton75737c02017-11-06 10:37:17 -08005503 rtp_data_channel_->SignalDtlsSrtpSetupFailure.connect(
5504 this, &PeerConnection::OnDtlsSrtpSetupFailure);
5505 rtp_data_channel_->SignalSentPacket.connect(
5506 this, &PeerConnection::OnSentPacket_w);
Zhi Huange830e682018-03-30 10:48:35 -07005507 rtp_data_channel_->SetRtpTransport(rtp_transport);
Steve Antondb67ba12018-03-19 17:41:42 -07005508 if (uma_observer_) {
5509 rtp_data_channel_->SetMetricsObserver(uma_observer_);
5510 }
Steve Anton75737c02017-11-06 10:37:17 -08005511 }
5512
Steve Anton75737c02017-11-06 10:37:17 -08005513 return true;
5514}
5515
5516Call::Stats PeerConnection::GetCallStats() {
5517 if (!worker_thread()->IsCurrent()) {
5518 return worker_thread()->Invoke<Call::Stats>(
5519 RTC_FROM_HERE, rtc::Bind(&PeerConnection::GetCallStats, this));
5520 }
5521 if (call_) {
5522 return call_->GetStats();
5523 } else {
5524 return Call::Stats();
5525 }
5526}
5527
Zhi Huange830e682018-03-30 10:48:35 -07005528bool PeerConnection::CreateSctpTransport_n(const std::string& mid) {
Steve Anton75737c02017-11-06 10:37:17 -08005529 RTC_DCHECK(network_thread()->IsCurrent());
5530 RTC_DCHECK(sctp_factory_);
Zhi Huang644fde42018-04-02 19:16:26 -07005531 cricket::DtlsTransportInternal* dtls_transport =
Zhi Huange830e682018-03-30 10:48:35 -07005532 transport_controller_->GetDtlsTransport(mid);
Zhi Huang644fde42018-04-02 19:16:26 -07005533 RTC_DCHECK(dtls_transport);
5534 sctp_transport_ = sctp_factory_->CreateSctpTransport(dtls_transport);
Steve Anton75737c02017-11-06 10:37:17 -08005535 RTC_DCHECK(sctp_transport_);
5536 sctp_invoker_.reset(new rtc::AsyncInvoker());
5537 sctp_transport_->SignalReadyToSendData.connect(
5538 this, &PeerConnection::OnSctpTransportReadyToSendData_n);
5539 sctp_transport_->SignalDataReceived.connect(
5540 this, &PeerConnection::OnSctpTransportDataReceived_n);
5541 sctp_transport_->SignalStreamClosedRemotely.connect(
5542 this, &PeerConnection::OnSctpStreamClosedRemotely_n);
Zhi Huange830e682018-03-30 10:48:35 -07005543 sctp_mid_ = mid;
Zhi Huang644fde42018-04-02 19:16:26 -07005544 sctp_transport_->SetDtlsTransport(dtls_transport);
Zhi Huange830e682018-03-30 10:48:35 -07005545 return true;
Steve Anton75737c02017-11-06 10:37:17 -08005546}
5547
5548void PeerConnection::DestroySctpTransport_n() {
5549 RTC_DCHECK(network_thread()->IsCurrent());
5550 sctp_transport_.reset(nullptr);
Zhi Huange830e682018-03-30 10:48:35 -07005551 sctp_mid_.reset();
Steve Anton75737c02017-11-06 10:37:17 -08005552 sctp_invoker_.reset(nullptr);
5553 sctp_ready_to_send_data_ = false;
5554}
5555
5556void PeerConnection::OnSctpTransportReadyToSendData_n() {
5557 RTC_DCHECK(data_channel_type_ == cricket::DCT_SCTP);
5558 RTC_DCHECK(network_thread()->IsCurrent());
5559 // Note: Cannot use rtc::Bind here because it will grab a reference to
5560 // PeerConnection and potentially cause PeerConnection to live longer than
5561 // expected. It is safe not to grab a reference since the sctp_invoker_ will
5562 // be destroyed before PeerConnection is destroyed, and at that point all
5563 // pending tasks will be cleared.
5564 sctp_invoker_->AsyncInvoke<void>(RTC_FROM_HERE, signaling_thread(), [this] {
5565 OnSctpTransportReadyToSendData_s(true);
5566 });
5567}
5568
5569void PeerConnection::OnSctpTransportReadyToSendData_s(bool ready) {
5570 RTC_DCHECK(signaling_thread()->IsCurrent());
5571 sctp_ready_to_send_data_ = ready;
5572 SignalSctpReadyToSendData(ready);
5573}
5574
5575void PeerConnection::OnSctpTransportDataReceived_n(
5576 const cricket::ReceiveDataParams& params,
5577 const rtc::CopyOnWriteBuffer& payload) {
5578 RTC_DCHECK(data_channel_type_ == cricket::DCT_SCTP);
5579 RTC_DCHECK(network_thread()->IsCurrent());
5580 // Note: Cannot use rtc::Bind here because it will grab a reference to
5581 // PeerConnection and potentially cause PeerConnection to live longer than
5582 // expected. It is safe not to grab a reference since the sctp_invoker_ will
5583 // be destroyed before PeerConnection is destroyed, and at that point all
5584 // pending tasks will be cleared.
5585 sctp_invoker_->AsyncInvoke<void>(
5586 RTC_FROM_HERE, signaling_thread(), [this, params, payload] {
5587 OnSctpTransportDataReceived_s(params, payload);
5588 });
5589}
5590
5591void PeerConnection::OnSctpTransportDataReceived_s(
5592 const cricket::ReceiveDataParams& params,
5593 const rtc::CopyOnWriteBuffer& payload) {
5594 RTC_DCHECK(signaling_thread()->IsCurrent());
5595 if (params.type == cricket::DMT_CONTROL && IsOpenMessage(payload)) {
5596 // Received OPEN message; parse and signal that a new data channel should
5597 // be created.
5598 std::string label;
5599 InternalDataChannelInit config;
5600 config.id = params.ssrc;
5601 if (!ParseDataChannelOpenMessage(payload, &label, &config)) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005602 RTC_LOG(LS_WARNING) << "Failed to parse the OPEN message for sid "
5603 << params.ssrc;
Steve Anton75737c02017-11-06 10:37:17 -08005604 return;
5605 }
5606 config.open_handshake_role = InternalDataChannelInit::kAcker;
5607 OnDataChannelOpenMessage(label, config);
5608 } else {
5609 // Otherwise just forward the signal.
5610 SignalSctpDataReceived(params, payload);
5611 }
5612}
5613
5614void PeerConnection::OnSctpStreamClosedRemotely_n(int sid) {
5615 RTC_DCHECK(data_channel_type_ == cricket::DCT_SCTP);
5616 RTC_DCHECK(network_thread()->IsCurrent());
5617 sctp_invoker_->AsyncInvoke<void>(
5618 RTC_FROM_HERE, signaling_thread(),
5619 rtc::Bind(&sigslot::signal1<int>::operator(),
5620 &SignalSctpStreamClosedRemotely, sid));
5621}
5622
5623// Returns false if bundle is enabled and rtcp_mux is disabled.
5624bool PeerConnection::ValidateBundleSettings(const SessionDescription* desc) {
5625 bool bundle_enabled = desc->HasGroup(cricket::GROUP_TYPE_BUNDLE);
5626 if (!bundle_enabled)
5627 return true;
5628
5629 const cricket::ContentGroup* bundle_group =
5630 desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE);
5631 RTC_DCHECK(bundle_group != NULL);
5632
5633 const cricket::ContentInfos& contents = desc->contents();
5634 for (cricket::ContentInfos::const_iterator citer = contents.begin();
5635 citer != contents.end(); ++citer) {
5636 const cricket::ContentInfo* content = (&*citer);
5637 RTC_DCHECK(content != NULL);
5638 if (bundle_group->HasContentName(content->name) && !content->rejected &&
Steve Anton5adfafd2017-12-20 16:34:00 -08005639 content->type == MediaProtocolType::kRtp) {
Steve Anton75737c02017-11-06 10:37:17 -08005640 if (!HasRtcpMuxEnabled(content))
5641 return false;
5642 }
5643 }
5644 // RTCP-MUX is enabled in all the contents.
5645 return true;
5646}
5647
5648bool PeerConnection::HasRtcpMuxEnabled(const cricket::ContentInfo* content) {
Steve Antonb1c1de12017-12-21 15:14:30 -08005649 return content->media_description()->rtcp_mux();
Steve Anton75737c02017-11-06 10:37:17 -08005650}
5651
Steve Anton8a006912017-12-04 15:25:56 -08005652RTCError PeerConnection::ValidateSessionDescription(
Steve Anton75737c02017-11-06 10:37:17 -08005653 const SessionDescriptionInterface* sdesc,
Steve Anton8a006912017-12-04 15:25:56 -08005654 cricket::ContentSource source) {
Steve Antonf8470812017-12-04 10:46:21 -08005655 if (session_error() != SessionError::kNone) {
Steve Anton8a006912017-12-04 15:25:56 -08005656 LOG_AND_RETURN_ERROR(RTCErrorType::INTERNAL_ERROR, GetSessionErrorMsg());
Steve Anton75737c02017-11-06 10:37:17 -08005657 }
5658
5659 if (!sdesc || !sdesc->description()) {
Steve Anton8a006912017-12-04 15:25:56 -08005660 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER, kInvalidSdp);
Steve Anton75737c02017-11-06 10:37:17 -08005661 }
5662
Steve Anton3828c062017-12-06 10:34:51 -08005663 SdpType type = sdesc->GetType();
5664 if ((source == cricket::CS_LOCAL && !ExpectSetLocalDescription(type)) ||
5665 (source == cricket::CS_REMOTE && !ExpectSetRemoteDescription(type))) {
Steve Anton8a006912017-12-04 15:25:56 -08005666 LOG_AND_RETURN_ERROR(
Harald Alvestrand5081c0c2018-03-09 15:18:03 +01005667 RTCErrorType::INVALID_STATE,
Steve Anton8a006912017-12-04 15:25:56 -08005668 "Called in wrong state: " + GetSignalingStateString(signaling_state()));
Steve Anton75737c02017-11-06 10:37:17 -08005669 }
5670
5671 // Verify crypto settings.
5672 std::string crypto_error;
Steve Anton8a006912017-12-04 15:25:56 -08005673 if (webrtc_session_desc_factory_->SdesPolicy() == cricket::SEC_REQUIRED ||
5674 dtls_enabled_) {
Harald Alvestrand194939b2018-01-24 16:04:13 +01005675 RTCError crypto_error =
5676 VerifyCrypto(sdesc->description(), dtls_enabled_, uma_observer_);
Steve Anton8a006912017-12-04 15:25:56 -08005677 if (!crypto_error.ok()) {
5678 return crypto_error;
5679 }
Steve Anton75737c02017-11-06 10:37:17 -08005680 }
5681
5682 // Verify ice-ufrag and ice-pwd.
5683 if (!VerifyIceUfragPwdPresent(sdesc->description())) {
Steve Anton8a006912017-12-04 15:25:56 -08005684 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5685 kSdpWithoutIceUfragPwd);
Steve Anton75737c02017-11-06 10:37:17 -08005686 }
5687
5688 if (!ValidateBundleSettings(sdesc->description())) {
Steve Anton8a006912017-12-04 15:25:56 -08005689 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5690 kBundleWithoutRtcpMux);
Steve Anton75737c02017-11-06 10:37:17 -08005691 }
5692
5693 // TODO(skvlad): When the local rtcp-mux policy is Require, reject any
5694 // m-lines that do not rtcp-mux enabled.
5695
5696 // Verify m-lines in Answer when compared against Offer.
Steve Anton3828c062017-12-06 10:34:51 -08005697 if (type == SdpType::kPrAnswer || type == SdpType::kAnswer) {
Seth Hampsonae8a90a2018-02-13 15:33:48 -08005698 // With an answer we want to compare the new answer session description with
5699 // the offer's session description from the current negotiation.
Steve Anton75737c02017-11-06 10:37:17 -08005700 const cricket::SessionDescription* offer_desc =
5701 (source == cricket::CS_LOCAL) ? remote_description()->description()
5702 : local_description()->description();
Seth Hampsonae8a90a2018-02-13 15:33:48 -08005703 if (!MediaSectionsHaveSameCount(*offer_desc, *sdesc->description()) ||
5704 !MediaSectionsInSameOrder(*offer_desc, nullptr, *sdesc->description(),
5705 type)) {
Steve Anton8a006912017-12-04 15:25:56 -08005706 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5707 kMlineMismatchInAnswer);
Steve Anton75737c02017-11-06 10:37:17 -08005708 }
5709 } else {
Steve Anton75737c02017-11-06 10:37:17 -08005710 // The re-offers should respect the order of m= sections in current
5711 // description. See RFC3264 Section 8 paragraph 4 for more details.
Seth Hampsonae8a90a2018-02-13 15:33:48 -08005712 // With a re-offer, either the current local or current remote descriptions
5713 // could be the most up to date, so we would like to check against both of
5714 // them if they exist. It could be the case that one of them has a 0 port
5715 // for a media section, but the other does not. This is important to check
5716 // against in the case that we are recycling an m= section.
5717 const cricket::SessionDescription* current_desc = nullptr;
5718 const cricket::SessionDescription* secondary_current_desc = nullptr;
5719 if (local_description()) {
5720 current_desc = local_description()->description();
5721 if (remote_description()) {
5722 secondary_current_desc = remote_description()->description();
5723 }
5724 } else if (remote_description()) {
5725 current_desc = remote_description()->description();
5726 }
Steve Anton75737c02017-11-06 10:37:17 -08005727 if (current_desc &&
Seth Hampsonae8a90a2018-02-13 15:33:48 -08005728 !MediaSectionsInSameOrder(*current_desc, secondary_current_desc,
5729 *sdesc->description(), type)) {
Steve Anton8a006912017-12-04 15:25:56 -08005730 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5731 kMlineMismatchInSubsequentOffer);
Steve Anton75737c02017-11-06 10:37:17 -08005732 }
5733 }
5734
Steve Antonba42e992018-04-09 14:10:01 -07005735 if (IsUnifiedPlan()) {
5736 // Ensure that each audio and video media section has at most one
5737 // "StreamParams". This will return an error if receiving a session
5738 // description from a "Plan B" endpoint which adds multiple tracks of the
5739 // same type. With Unified Plan, there can only be at most one track per
5740 // media section.
5741 for (const ContentInfo& content : sdesc->description()->contents()) {
5742 const MediaContentDescription& desc = *content.description;
5743 if ((desc.type() == cricket::MEDIA_TYPE_AUDIO ||
5744 desc.type() == cricket::MEDIA_TYPE_VIDEO) &&
5745 desc.streams().size() > 1u) {
5746 LOG_AND_RETURN_ERROR(RTCErrorType::INVALID_PARAMETER,
5747 "Media section has more than one track specified "
5748 "with a=ssrc lines which is not supported with "
5749 "Unified Plan.");
5750 }
5751 }
5752 }
5753
Steve Anton8a006912017-12-04 15:25:56 -08005754 return RTCError::OK();
Steve Anton75737c02017-11-06 10:37:17 -08005755}
5756
Steve Anton3828c062017-12-06 10:34:51 -08005757bool PeerConnection::ExpectSetLocalDescription(SdpType type) {
Steve Anton75737c02017-11-06 10:37:17 -08005758 PeerConnectionInterface::SignalingState state = signaling_state();
Steve Anton3828c062017-12-06 10:34:51 -08005759 if (type == SdpType::kOffer) {
Steve Anton75737c02017-11-06 10:37:17 -08005760 return (state == PeerConnectionInterface::kStable) ||
5761 (state == PeerConnectionInterface::kHaveLocalOffer);
Steve Anton20393062017-12-04 16:24:52 -08005762 } else {
Steve Anton3828c062017-12-06 10:34:51 -08005763 RTC_DCHECK(type == SdpType::kPrAnswer || type == SdpType::kAnswer);
Steve Anton75737c02017-11-06 10:37:17 -08005764 return (state == PeerConnectionInterface::kHaveRemoteOffer) ||
5765 (state == PeerConnectionInterface::kHaveLocalPrAnswer);
5766 }
5767}
5768
Steve Anton3828c062017-12-06 10:34:51 -08005769bool PeerConnection::ExpectSetRemoteDescription(SdpType type) {
Steve Anton75737c02017-11-06 10:37:17 -08005770 PeerConnectionInterface::SignalingState state = signaling_state();
Steve Anton3828c062017-12-06 10:34:51 -08005771 if (type == SdpType::kOffer) {
Steve Anton75737c02017-11-06 10:37:17 -08005772 return (state == PeerConnectionInterface::kStable) ||
5773 (state == PeerConnectionInterface::kHaveRemoteOffer);
Steve Anton20393062017-12-04 16:24:52 -08005774 } else {
Steve Anton3828c062017-12-06 10:34:51 -08005775 RTC_DCHECK(type == SdpType::kPrAnswer || type == SdpType::kAnswer);
Steve Anton75737c02017-11-06 10:37:17 -08005776 return (state == PeerConnectionInterface::kHaveLocalOffer) ||
5777 (state == PeerConnectionInterface::kHaveRemotePrAnswer);
5778 }
5779}
5780
Steve Antonf8470812017-12-04 10:46:21 -08005781const char* PeerConnection::SessionErrorToString(SessionError error) const {
5782 switch (error) {
5783 case SessionError::kNone:
5784 return "ERROR_NONE";
5785 case SessionError::kContent:
5786 return "ERROR_CONTENT";
5787 case SessionError::kTransport:
5788 return "ERROR_TRANSPORT";
5789 }
5790 RTC_NOTREACHED();
5791 return "";
5792}
5793
Steve Anton75737c02017-11-06 10:37:17 -08005794std::string PeerConnection::GetSessionErrorMsg() {
5795 std::ostringstream desc;
Steve Antonf8470812017-12-04 10:46:21 -08005796 desc << kSessionError << SessionErrorToString(session_error()) << ". ";
5797 desc << kSessionErrorDesc << session_error_desc() << ".";
Steve Anton75737c02017-11-06 10:37:17 -08005798 return desc.str();
5799}
5800
Steve Anton8e20f172018-03-06 10:55:04 -08005801void PeerConnection::ReportSdpFormatReceived(
5802 const SessionDescriptionInterface& remote_offer) {
5803 if (!uma_observer_) {
5804 return;
5805 }
5806 int num_audio_mlines = 0;
5807 int num_video_mlines = 0;
5808 int num_audio_tracks = 0;
5809 int num_video_tracks = 0;
5810 for (const ContentInfo& content : remote_offer.description()->contents()) {
5811 cricket::MediaType media_type = content.media_description()->type();
5812 int num_tracks = std::max(
5813 1, static_cast<int>(content.media_description()->streams().size()));
5814 if (media_type == cricket::MEDIA_TYPE_AUDIO) {
5815 num_audio_mlines += 1;
5816 num_audio_tracks += num_tracks;
5817 } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
5818 num_video_mlines += 1;
5819 num_video_tracks += num_tracks;
5820 }
5821 }
5822 SdpFormatReceived format = kSdpFormatReceivedNoTracks;
5823 if (num_audio_mlines > 1 || num_video_mlines > 1) {
5824 format = kSdpFormatReceivedComplexUnifiedPlan;
5825 } else if (num_audio_tracks > 1 || num_video_tracks > 1) {
5826 format = kSdpFormatReceivedComplexPlanB;
5827 } else if (num_audio_tracks > 0 || num_video_tracks > 0) {
5828 format = kSdpFormatReceivedSimple;
5829 }
5830 uma_observer_->IncrementEnumCounter(kEnumCounterSdpFormatReceived, format,
5831 kSdpFormatReceivedMax);
5832}
5833
Steve Anton0ffaaa22018-02-23 10:31:30 -08005834void PeerConnection::ReportNegotiatedSdpSemantics(
5835 const SessionDescriptionInterface& answer) {
5836 if (!uma_observer_) {
5837 return;
5838 }
5839 switch (answer.description()->msid_signaling()) {
5840 case 0:
5841 uma_observer_->IncrementEnumCounter(kEnumCounterSdpSemanticNegotiated,
5842 kSdpSemanticNegotiatedNone,
5843 kSdpSemanticNegotiatedMax);
5844 break;
5845 case cricket::kMsidSignalingMediaSection:
5846 uma_observer_->IncrementEnumCounter(kEnumCounterSdpSemanticNegotiated,
5847 kSdpSemanticNegotiatedUnifiedPlan,
5848 kSdpSemanticNegotiatedMax);
5849 break;
5850 case cricket::kMsidSignalingSsrcAttribute:
5851 uma_observer_->IncrementEnumCounter(kEnumCounterSdpSemanticNegotiated,
5852 kSdpSemanticNegotiatedPlanB,
5853 kSdpSemanticNegotiatedMax);
5854 break;
5855 case cricket::kMsidSignalingMediaSection |
5856 cricket::kMsidSignalingSsrcAttribute:
5857 uma_observer_->IncrementEnumCounter(kEnumCounterSdpSemanticNegotiated,
5858 kSdpSemanticNegotiatedMixed,
5859 kSdpSemanticNegotiatedMax);
5860 break;
5861 default:
5862 RTC_NOTREACHED();
5863 }
5864}
5865
Steve Anton75737c02017-11-06 10:37:17 -08005866// We need to check the local/remote description for the Transport instead of
5867// the session, because a new Transport added during renegotiation may have
5868// them unset while the session has them set from the previous negotiation.
5869// Not doing so may trigger the auto generation of transport description and
5870// mess up DTLS identity information, ICE credential, etc.
5871bool PeerConnection::ReadyToUseRemoteCandidate(
5872 const IceCandidateInterface* candidate,
5873 const SessionDescriptionInterface* remote_desc,
5874 bool* valid) {
5875 *valid = true;
5876
5877 const SessionDescriptionInterface* current_remote_desc =
5878 remote_desc ? remote_desc : remote_description();
5879
5880 if (!current_remote_desc) {
5881 return false;
5882 }
5883
5884 size_t mediacontent_index = static_cast<size_t>(candidate->sdp_mline_index());
5885 size_t remote_content_size =
5886 current_remote_desc->description()->contents().size();
5887 if (mediacontent_index >= remote_content_size) {
Mirko Bonadei675513b2017-11-09 11:09:25 +01005888 RTC_LOG(LS_ERROR)
5889 << "ReadyToUseRemoteCandidate: Invalid candidate media index "
5890 << mediacontent_index;
Steve Anton75737c02017-11-06 10:37:17 -08005891
5892 *valid = false;
5893 return false;
5894 }
5895
5896 cricket::ContentInfo content =
5897 current_remote_desc->description()->contents()[mediacontent_index];
5898
5899 const std::string transport_name = GetTransportName(content.name);
5900 if (transport_name.empty()) {
5901 return false;
5902 }
Zhi Huange830e682018-03-30 10:48:35 -07005903 return true;
Steve Anton75737c02017-11-06 10:37:17 -08005904}
5905
5906bool PeerConnection::SrtpRequired() const {
5907 return dtls_enabled_ ||
5908 webrtc_session_desc_factory_->SdesPolicy() == cricket::SEC_REQUIRED;
5909}
5910
5911void PeerConnection::OnTransportControllerGatheringState(
5912 cricket::IceGatheringState state) {
5913 RTC_DCHECK(signaling_thread()->IsCurrent());
5914 if (state == cricket::kIceGatheringGathering) {
5915 OnIceGatheringChange(PeerConnectionInterface::kIceGatheringGathering);
5916 } else if (state == cricket::kIceGatheringComplete) {
5917 OnIceGatheringChange(PeerConnectionInterface::kIceGatheringComplete);
5918 }
5919}
5920
5921void PeerConnection::ReportTransportStats() {
Steve Antonc7b964c2018-02-01 14:39:45 -08005922 std::map<std::string, std::set<cricket::MediaType>>
5923 media_types_by_transport_name;
5924 for (auto transceiver : transceivers_) {
5925 if (transceiver->internal()->channel()) {
5926 const std::string& transport_name =
5927 transceiver->internal()->channel()->transport_name();
5928 media_types_by_transport_name[transport_name].insert(
Steve Anton69470252018-02-09 11:43:08 -08005929 transceiver->media_type());
Steve Antonc7b964c2018-02-01 14:39:45 -08005930 }
Steve Anton75737c02017-11-06 10:37:17 -08005931 }
5932 if (rtp_data_channel()) {
Steve Antonc7b964c2018-02-01 14:39:45 -08005933 media_types_by_transport_name[rtp_data_channel()->transport_name()].insert(
5934 cricket::MEDIA_TYPE_DATA);
Steve Anton75737c02017-11-06 10:37:17 -08005935 }
Zhi Huange830e682018-03-30 10:48:35 -07005936
5937 rtc::Optional<std::string> transport_name = sctp_transport_name();
5938 if (transport_name) {
5939 media_types_by_transport_name[*transport_name].insert(
Steve Antonc7b964c2018-02-01 14:39:45 -08005940 cricket::MEDIA_TYPE_DATA);
Steve Anton75737c02017-11-06 10:37:17 -08005941 }
Zhi Huange830e682018-03-30 10:48:35 -07005942
Steve Antonc7b964c2018-02-01 14:39:45 -08005943 for (const auto& entry : media_types_by_transport_name) {
5944 const std::string& transport_name = entry.first;
5945 const std::set<cricket::MediaType> media_types = entry.second;
Steve Anton75737c02017-11-06 10:37:17 -08005946 cricket::TransportStats stats;
Steve Antonc7b964c2018-02-01 14:39:45 -08005947 if (transport_controller_->GetStats(transport_name, &stats)) {
Steve Anton75737c02017-11-06 10:37:17 -08005948 ReportBestConnectionState(stats);
Steve Antonc7b964c2018-02-01 14:39:45 -08005949 ReportNegotiatedCiphers(stats, media_types);
Steve Anton75737c02017-11-06 10:37:17 -08005950 }
5951 }
5952}
5953// Walk through the ConnectionInfos to gather best connection usage
5954// for IPv4 and IPv6.
5955void PeerConnection::ReportBestConnectionState(
5956 const cricket::TransportStats& stats) {
5957 RTC_DCHECK(metrics_observer());
Steve Antonc7b964c2018-02-01 14:39:45 -08005958 for (const cricket::TransportChannelStats& channel_stats :
5959 stats.channel_stats) {
5960 for (const cricket::ConnectionInfo& connection_info :
5961 channel_stats.connection_infos) {
5962 if (!connection_info.best_connection) {
Steve Anton75737c02017-11-06 10:37:17 -08005963 continue;
5964 }
5965
5966 PeerConnectionEnumCounterType type = kPeerConnectionEnumCounterMax;
Steve Antonc7b964c2018-02-01 14:39:45 -08005967 const cricket::Candidate& local = connection_info.local_candidate;
5968 const cricket::Candidate& remote = connection_info.remote_candidate;
Steve Anton75737c02017-11-06 10:37:17 -08005969
5970 // Increment the counter for IceCandidatePairType.
5971 if (local.protocol() == cricket::TCP_PROTOCOL_NAME ||
5972 (local.type() == RELAY_PORT_TYPE &&
5973 local.relay_protocol() == cricket::TCP_PROTOCOL_NAME)) {
5974 type = kEnumCounterIceCandidatePairTypeTcp;
5975 } else if (local.protocol() == cricket::UDP_PROTOCOL_NAME) {
5976 type = kEnumCounterIceCandidatePairTypeUdp;
5977 } else {
5978 RTC_CHECK(0);
5979 }
5980 metrics_observer()->IncrementEnumCounter(
5981 type, GetIceCandidatePairCounter(local, remote),
5982 kIceCandidatePairMax);
5983
5984 // Increment the counter for IP type.
5985 if (local.address().family() == AF_INET) {
5986 metrics_observer()->IncrementEnumCounter(
5987 kEnumCounterAddressFamily, kBestConnections_IPv4,
5988 kPeerConnectionAddressFamilyCounter_Max);
5989
5990 } else if (local.address().family() == AF_INET6) {
5991 metrics_observer()->IncrementEnumCounter(
5992 kEnumCounterAddressFamily, kBestConnections_IPv6,
5993 kPeerConnectionAddressFamilyCounter_Max);
5994 } else {
5995 RTC_CHECK(0);
5996 }
5997
5998 return;
5999 }
6000 }
6001}
6002
6003void PeerConnection::ReportNegotiatedCiphers(
Steve Antonc7b964c2018-02-01 14:39:45 -08006004 const cricket::TransportStats& stats,
6005 const std::set<cricket::MediaType>& media_types) {
Steve Anton75737c02017-11-06 10:37:17 -08006006 RTC_DCHECK(metrics_observer());
6007 if (!dtls_enabled_ || stats.channel_stats.empty()) {
6008 return;
6009 }
6010
6011 int srtp_crypto_suite = stats.channel_stats[0].srtp_crypto_suite;
6012 int ssl_cipher_suite = stats.channel_stats[0].ssl_cipher_suite;
6013 if (srtp_crypto_suite == rtc::SRTP_INVALID_CRYPTO_SUITE &&
6014 ssl_cipher_suite == rtc::TLS_NULL_WITH_NULL_NULL) {
6015 return;
6016 }
6017
Steve Antonc7b964c2018-02-01 14:39:45 -08006018 for (cricket::MediaType media_type : media_types) {
6019 PeerConnectionEnumCounterType srtp_counter_type;
6020 PeerConnectionEnumCounterType ssl_counter_type;
6021 switch (media_type) {
6022 case cricket::MEDIA_TYPE_AUDIO:
6023 srtp_counter_type = kEnumCounterAudioSrtpCipher;
6024 ssl_counter_type = kEnumCounterAudioSslCipher;
6025 break;
6026 case cricket::MEDIA_TYPE_VIDEO:
6027 srtp_counter_type = kEnumCounterVideoSrtpCipher;
6028 ssl_counter_type = kEnumCounterVideoSslCipher;
6029 break;
6030 case cricket::MEDIA_TYPE_DATA:
6031 srtp_counter_type = kEnumCounterDataSrtpCipher;
6032 ssl_counter_type = kEnumCounterDataSslCipher;
6033 break;
6034 default:
6035 RTC_NOTREACHED();
6036 continue;
6037 }
6038 if (srtp_crypto_suite != rtc::SRTP_INVALID_CRYPTO_SUITE) {
6039 metrics_observer()->IncrementSparseEnumCounter(srtp_counter_type,
6040 srtp_crypto_suite);
6041 }
6042 if (ssl_cipher_suite != rtc::TLS_NULL_WITH_NULL_NULL) {
6043 metrics_observer()->IncrementSparseEnumCounter(ssl_counter_type,
6044 ssl_cipher_suite);
6045 }
Steve Anton75737c02017-11-06 10:37:17 -08006046 }
6047}
6048
6049void PeerConnection::OnSentPacket_w(const rtc::SentPacket& sent_packet) {
6050 RTC_DCHECK(worker_thread()->IsCurrent());
6051 RTC_DCHECK(call_);
6052 call_->OnSentPacket(sent_packet);
6053}
6054
6055const std::string PeerConnection::GetTransportName(
6056 const std::string& content_name) {
6057 cricket::BaseChannel* channel = GetChannel(content_name);
Steve Anton6fec8802017-12-04 10:37:29 -08006058 if (channel) {
6059 return channel->transport_name();
Steve Anton75737c02017-11-06 10:37:17 -08006060 }
Steve Anton6fec8802017-12-04 10:37:29 -08006061 if (sctp_transport_) {
Zhi Huange830e682018-03-30 10:48:35 -07006062 RTC_DCHECK(sctp_mid_);
6063 if (content_name == *sctp_mid_) {
6064 return *sctp_transport_name();
Steve Anton6fec8802017-12-04 10:37:29 -08006065 }
6066 }
6067 // Return an empty string if failed to retrieve the transport name.
6068 return "";
Steve Anton75737c02017-11-06 10:37:17 -08006069}
6070
Steve Anton6fec8802017-12-04 10:37:29 -08006071void PeerConnection::DestroyTransceiverChannel(
6072 rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
6073 transceiver) {
6074 RTC_DCHECK(transceiver);
Steve Anton75737c02017-11-06 10:37:17 -08006075
Steve Anton6fec8802017-12-04 10:37:29 -08006076 cricket::BaseChannel* channel = transceiver->internal()->channel();
6077 if (channel) {
6078 transceiver->internal()->SetChannel(nullptr);
6079 DestroyBaseChannel(channel);
Steve Anton75737c02017-11-06 10:37:17 -08006080 }
6081}
6082
6083void PeerConnection::DestroyDataChannel() {
Steve Anton6fec8802017-12-04 10:37:29 -08006084 if (rtp_data_channel_) {
6085 OnDataChannelDestroyed();
6086 DestroyBaseChannel(rtp_data_channel_);
6087 rtp_data_channel_ = nullptr;
6088 }
6089
6090 // Note: Cannot use rtc::Bind to create a functor to invoke because it will
6091 // grab a reference to this PeerConnection. If this is called from the
6092 // PeerConnection destructor, the RefCountedObject vtable will have already
6093 // been destroyed (since it is a subclass of PeerConnection) and using
6094 // rtc::Bind will cause "Pure virtual function called" error to appear.
6095
6096 if (sctp_transport_) {
6097 OnDataChannelDestroyed();
6098 network_thread()->Invoke<void>(RTC_FROM_HERE,
6099 [this] { DestroySctpTransport_n(); });
6100 }
6101}
6102
6103void PeerConnection::DestroyBaseChannel(cricket::BaseChannel* channel) {
6104 RTC_DCHECK(channel);
Steve Anton6fec8802017-12-04 10:37:29 -08006105 switch (channel->media_type()) {
6106 case cricket::MEDIA_TYPE_AUDIO:
6107 channel_manager()->DestroyVoiceChannel(
6108 static_cast<cricket::VoiceChannel*>(channel));
6109 break;
6110 case cricket::MEDIA_TYPE_VIDEO:
6111 channel_manager()->DestroyVideoChannel(
6112 static_cast<cricket::VideoChannel*>(channel));
6113 break;
6114 case cricket::MEDIA_TYPE_DATA:
6115 channel_manager()->DestroyRtpDataChannel(
6116 static_cast<cricket::RtpDataChannel*>(channel));
6117 break;
6118 default:
6119 RTC_NOTREACHED() << "Unknown media type: " << channel->media_type();
6120 break;
6121 }
Zhi Huange830e682018-03-30 10:48:35 -07006122}
Steve Anton6fec8802017-12-04 10:37:29 -08006123
Taylor Brandstettercbaa2542018-04-16 16:42:14 -07006124bool PeerConnection::OnTransportChanged(
Zhi Huange830e682018-03-30 10:48:35 -07006125 const std::string& mid,
Taylor Brandstettercbaa2542018-04-16 16:42:14 -07006126 RtpTransportInternal* rtp_transport,
6127 cricket::DtlsTransportInternal* dtls_transport) {
6128 bool ret = true;
Zhi Huange830e682018-03-30 10:48:35 -07006129 auto base_channel = GetChannel(mid);
6130 if (base_channel) {
Taylor Brandstettercbaa2542018-04-16 16:42:14 -07006131 ret = base_channel->SetRtpTransport(rtp_transport);
Zhi Huange830e682018-03-30 10:48:35 -07006132 }
Taylor Brandstettercbaa2542018-04-16 16:42:14 -07006133 if (sctp_transport_ && mid == sctp_mid_) {
Zhi Huang644fde42018-04-02 19:16:26 -07006134 sctp_transport_->SetDtlsTransport(dtls_transport);
Steve Anton75737c02017-11-06 10:37:17 -08006135 }
Taylor Brandstettercbaa2542018-04-16 16:42:14 -07006136 return ret;
Steve Anton75737c02017-11-06 10:37:17 -08006137}
6138
Harald Alvestrand89061872018-01-02 14:08:34 +01006139void PeerConnection::ClearStatsCache() {
6140 if (stats_collector_) {
6141 stats_collector_->ClearCachedStatsReport();
6142 }
6143}
6144
henrike@webrtc.org28e20752013-07-10 00:45:36 +00006145} // namespace webrtc