forked from JumpingYang001/webrtc
-
Notifications
You must be signed in to change notification settings - Fork 0
/
peer_connection_signaling_unittest.cc
1231 lines (1064 loc) · 47.9 KB
/
peer_connection_signaling_unittest.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// This file contains tests that check the PeerConnection's signaling state
// machine, as well as tests that check basic, media-agnostic aspects of SDP.
#include <algorithm>
#include <memory>
#include <tuple>
#include "api/audio_codecs/builtin_audio_decoder_factory.h"
#include "api/audio_codecs/builtin_audio_encoder_factory.h"
#include "api/create_peerconnection_factory.h"
#include "api/jsep_session_description.h"
#include "api/video_codecs/builtin_video_decoder_factory.h"
#include "api/video_codecs/builtin_video_encoder_factory.h"
#include "pc/peer_connection.h"
#include "pc/peer_connection_proxy.h"
#include "pc/peer_connection_wrapper.h"
#include "pc/sdp_utils.h"
#include "pc/webrtc_sdp.h"
#ifdef WEBRTC_ANDROID
#include "pc/test/android_test_initializer.h"
#endif
#include "pc/test/fake_audio_capture_module.h"
#include "pc/test/fake_rtc_certificate_generator.h"
#include "rtc_base/gunit.h"
#include "rtc_base/virtual_socket_server.h"
#include "test/gmock.h"
namespace webrtc {
using SignalingState = PeerConnectionInterface::SignalingState;
using RTCConfiguration = PeerConnectionInterface::RTCConfiguration;
using RTCOfferAnswerOptions = PeerConnectionInterface::RTCOfferAnswerOptions;
using ::testing::Bool;
using ::testing::Combine;
using ::testing::Values;
namespace {
const int64_t kWaitTimeout = 10000;
} // namespace
class PeerConnectionWrapperForSignalingTest : public PeerConnectionWrapper {
public:
using PeerConnectionWrapper::PeerConnectionWrapper;
bool initial_offerer() {
return GetInternalPeerConnection()->initial_offerer();
}
PeerConnection* GetInternalPeerConnection() {
auto* pci =
static_cast<PeerConnectionProxyWithInternal<PeerConnectionInterface>*>(
pc());
return static_cast<PeerConnection*>(pci->internal());
}
};
class ExecuteFunctionOnCreateSessionDescriptionObserver
: public CreateSessionDescriptionObserver {
public:
ExecuteFunctionOnCreateSessionDescriptionObserver(
std::function<void(SessionDescriptionInterface*)> function)
: function_(std::move(function)) {}
~ExecuteFunctionOnCreateSessionDescriptionObserver() override {
RTC_DCHECK(was_called_);
}
bool was_called() const { return was_called_; }
void OnSuccess(SessionDescriptionInterface* desc) override {
RTC_DCHECK(!was_called_);
was_called_ = true;
function_(desc);
}
void OnFailure(RTCError error) override { RTC_NOTREACHED(); }
private:
bool was_called_ = false;
std::function<void(SessionDescriptionInterface*)> function_;
};
class PeerConnectionSignalingBaseTest : public ::testing::Test {
protected:
typedef std::unique_ptr<PeerConnectionWrapperForSignalingTest> WrapperPtr;
explicit PeerConnectionSignalingBaseTest(SdpSemantics sdp_semantics)
: vss_(new rtc::VirtualSocketServer()),
main_(vss_.get()),
sdp_semantics_(sdp_semantics) {
#ifdef WEBRTC_ANDROID
InitializeAndroidObjects();
#endif
pc_factory_ = CreatePeerConnectionFactory(
rtc::Thread::Current(), rtc::Thread::Current(), rtc::Thread::Current(),
rtc::scoped_refptr<AudioDeviceModule>(FakeAudioCaptureModule::Create()),
CreateBuiltinAudioEncoderFactory(), CreateBuiltinAudioDecoderFactory(),
CreateBuiltinVideoEncoderFactory(), CreateBuiltinVideoDecoderFactory(),
nullptr /* audio_mixer */, nullptr /* audio_processing */);
}
WrapperPtr CreatePeerConnection() {
return CreatePeerConnection(RTCConfiguration());
}
WrapperPtr CreatePeerConnection(const RTCConfiguration& config) {
auto observer = std::make_unique<MockPeerConnectionObserver>();
RTCConfiguration modified_config = config;
modified_config.sdp_semantics = sdp_semantics_;
auto pc = pc_factory_->CreatePeerConnection(modified_config, nullptr,
nullptr, observer.get());
if (!pc) {
return nullptr;
}
observer->SetPeerConnectionInterface(pc.get());
return std::make_unique<PeerConnectionWrapperForSignalingTest>(
pc_factory_, pc, std::move(observer));
}
// Accepts the same arguments as CreatePeerConnection and adds default audio
// and video tracks.
template <typename... Args>
WrapperPtr CreatePeerConnectionWithAudioVideo(Args&&... args) {
auto wrapper = CreatePeerConnection(std::forward<Args>(args)...);
if (!wrapper) {
return nullptr;
}
wrapper->AddAudioTrack("a");
wrapper->AddVideoTrack("v");
return wrapper;
}
int NumberOfDtlsTransports(const WrapperPtr& pc_wrapper) {
std::set<DtlsTransportInterface*> transports;
auto transceivers = pc_wrapper->pc()->GetTransceivers();
for (auto& transceiver : transceivers) {
if (transceiver->sender()->dtls_transport()) {
EXPECT_TRUE(transceiver->receiver()->dtls_transport());
EXPECT_EQ(transceiver->sender()->dtls_transport().get(),
transceiver->receiver()->dtls_transport().get());
transports.insert(transceiver->sender()->dtls_transport().get());
} else {
// If one transceiver is missing, they all should be.
EXPECT_EQ(0UL, transports.size());
}
}
return transports.size();
}
bool HasDtlsTransport(const WrapperPtr& pc_wrapper) {
return NumberOfDtlsTransports(pc_wrapper) > 0;
}
std::unique_ptr<rtc::VirtualSocketServer> vss_;
rtc::AutoSocketServerThread main_;
rtc::scoped_refptr<PeerConnectionFactoryInterface> pc_factory_;
const SdpSemantics sdp_semantics_;
};
class PeerConnectionSignalingTest
: public PeerConnectionSignalingBaseTest,
public ::testing::WithParamInterface<SdpSemantics> {
protected:
PeerConnectionSignalingTest() : PeerConnectionSignalingBaseTest(GetParam()) {}
};
TEST_P(PeerConnectionSignalingTest, SetLocalOfferTwiceWorks) {
auto caller = CreatePeerConnection();
EXPECT_TRUE(caller->SetLocalDescription(caller->CreateOffer()));
EXPECT_TRUE(caller->SetLocalDescription(caller->CreateOffer()));
}
TEST_P(PeerConnectionSignalingTest, SetRemoteOfferTwiceWorks) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
EXPECT_TRUE(callee->SetRemoteDescription(caller->CreateOffer()));
EXPECT_TRUE(callee->SetRemoteDescription(caller->CreateOffer()));
}
TEST_P(PeerConnectionSignalingTest, FailToSetNullLocalDescription) {
auto caller = CreatePeerConnection();
std::string error;
ASSERT_FALSE(caller->SetLocalDescription(nullptr, &error));
EXPECT_EQ("SessionDescription is NULL.", error);
}
TEST_P(PeerConnectionSignalingTest, FailToSetNullRemoteDescription) {
auto caller = CreatePeerConnection();
std::string error;
ASSERT_FALSE(caller->SetRemoteDescription(nullptr, &error));
EXPECT_EQ("SessionDescription is NULL.", error);
}
// The following parameterized test verifies that calls to various signaling
// methods on PeerConnection will succeed/fail depending on what is the
// PeerConnection's signaling state. Note that the test tries many different
// forms of SignalingState::kClosed by arriving at a valid state then calling
// |Close()|. This is intended to catch cases where the PeerConnection signaling
// method ignores the closed flag but may work/not work because of the single
// state the PeerConnection was created in before it was closed.
class PeerConnectionSignalingStateTest
: public PeerConnectionSignalingBaseTest,
public ::testing::WithParamInterface<
std::tuple<SdpSemantics, SignalingState, bool>> {
protected:
PeerConnectionSignalingStateTest()
: PeerConnectionSignalingBaseTest(std::get<0>(GetParam())),
state_under_test_(std::make_tuple(std::get<1>(GetParam()),
std::get<2>(GetParam()))) {}
RTCConfiguration GetConfig() {
RTCConfiguration config;
config.certificates.push_back(
FakeRTCCertificateGenerator::GenerateCertificate());
return config;
}
WrapperPtr CreatePeerConnectionUnderTest() {
return CreatePeerConnectionInState(state_under_test_);
}
WrapperPtr CreatePeerConnectionInState(SignalingState state) {
return CreatePeerConnectionInState(std::make_tuple(state, false));
}
WrapperPtr CreatePeerConnectionInState(
std::tuple<SignalingState, bool> state_tuple) {
SignalingState state = std::get<0>(state_tuple);
bool closed = std::get<1>(state_tuple);
auto wrapper = CreatePeerConnectionWithAudioVideo(GetConfig());
switch (state) {
case SignalingState::kStable: {
break;
}
case SignalingState::kHaveLocalOffer: {
wrapper->SetLocalDescription(wrapper->CreateOffer());
break;
}
case SignalingState::kHaveLocalPrAnswer: {
auto caller = CreatePeerConnectionWithAudioVideo(GetConfig());
wrapper->SetRemoteDescription(caller->CreateOffer());
auto answer = wrapper->CreateAnswer();
wrapper->SetLocalDescription(
CloneSessionDescriptionAsType(answer.get(), SdpType::kPrAnswer));
break;
}
case SignalingState::kHaveRemoteOffer: {
auto caller = CreatePeerConnectionWithAudioVideo(GetConfig());
wrapper->SetRemoteDescription(caller->CreateOffer());
break;
}
case SignalingState::kHaveRemotePrAnswer: {
auto callee = CreatePeerConnectionWithAudioVideo(GetConfig());
callee->SetRemoteDescription(wrapper->CreateOfferAndSetAsLocal());
auto answer = callee->CreateAnswer();
wrapper->SetRemoteDescription(
CloneSessionDescriptionAsType(answer.get(), SdpType::kPrAnswer));
break;
}
case SignalingState::kClosed: {
RTC_NOTREACHED() << "Set the second member of the tuple to true to "
"achieve a closed state from an existing, valid "
"state.";
}
}
RTC_DCHECK_EQ(state, wrapper->pc()->signaling_state());
if (closed) {
wrapper->pc()->Close();
RTC_DCHECK_EQ(SignalingState::kClosed, wrapper->signaling_state());
}
return wrapper;
}
std::tuple<SignalingState, bool> state_under_test_;
};
TEST_P(PeerConnectionSignalingStateTest, CreateOffer) {
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() != SignalingState::kClosed) {
EXPECT_TRUE(wrapper->CreateOffer());
} else {
std::string error;
ASSERT_FALSE(wrapper->CreateOffer(RTCOfferAnswerOptions(), &error));
EXPECT_PRED_FORMAT2(AssertStartsWith, error,
"CreateOffer called when PeerConnection is closed.");
}
}
TEST_P(PeerConnectionSignalingStateTest, CreateAnswer) {
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kHaveLocalPrAnswer ||
wrapper->signaling_state() == SignalingState::kHaveRemoteOffer) {
EXPECT_TRUE(wrapper->CreateAnswer());
} else {
std::string error;
ASSERT_FALSE(wrapper->CreateAnswer(RTCOfferAnswerOptions(), &error));
EXPECT_EQ(error,
"PeerConnection cannot create an answer in a state other than "
"have-remote-offer or have-local-pranswer.");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetLocalOffer) {
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kStable ||
wrapper->signaling_state() == SignalingState::kHaveLocalOffer) {
// Need to call CreateOffer on the PeerConnection under test, otherwise when
// setting the local offer it will want to verify the DTLS fingerprint
// against the locally generated certificate, but without a call to
// CreateOffer the certificate will never be generated.
EXPECT_TRUE(wrapper->SetLocalDescription(wrapper->CreateOffer()));
} else {
auto wrapper_for_offer =
CreatePeerConnectionInState(SignalingState::kHaveLocalOffer);
auto offer =
CloneSessionDescription(wrapper_for_offer->pc()->local_description());
std::string error;
ASSERT_FALSE(wrapper->SetLocalDescription(std::move(offer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set local offer sdp: Called in wrong state:");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetLocalPrAnswer) {
auto wrapper_for_pranswer =
CreatePeerConnectionInState(SignalingState::kHaveLocalPrAnswer);
auto pranswer =
CloneSessionDescription(wrapper_for_pranswer->pc()->local_description());
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kHaveLocalPrAnswer ||
wrapper->signaling_state() == SignalingState::kHaveRemoteOffer) {
EXPECT_TRUE(wrapper->SetLocalDescription(std::move(pranswer)));
} else {
std::string error;
ASSERT_FALSE(wrapper->SetLocalDescription(std::move(pranswer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set local pranswer sdp: Called in wrong state:");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetLocalAnswer) {
auto wrapper_for_answer =
CreatePeerConnectionInState(SignalingState::kHaveRemoteOffer);
auto answer = wrapper_for_answer->CreateAnswer();
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kHaveLocalPrAnswer ||
wrapper->signaling_state() == SignalingState::kHaveRemoteOffer) {
EXPECT_TRUE(wrapper->SetLocalDescription(std::move(answer)));
} else {
std::string error;
ASSERT_FALSE(wrapper->SetLocalDescription(std::move(answer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set local answer sdp: Called in wrong state:");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetRemoteOffer) {
auto wrapper_for_offer =
CreatePeerConnectionInState(SignalingState::kHaveRemoteOffer);
auto offer =
CloneSessionDescription(wrapper_for_offer->pc()->remote_description());
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kStable ||
wrapper->signaling_state() == SignalingState::kHaveRemoteOffer) {
EXPECT_TRUE(wrapper->SetRemoteDescription(std::move(offer)));
} else {
std::string error;
ASSERT_FALSE(wrapper->SetRemoteDescription(std::move(offer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set remote offer sdp: Called in wrong state:");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetRemotePrAnswer) {
auto wrapper_for_pranswer =
CreatePeerConnectionInState(SignalingState::kHaveRemotePrAnswer);
auto pranswer =
CloneSessionDescription(wrapper_for_pranswer->pc()->remote_description());
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kHaveLocalOffer ||
wrapper->signaling_state() == SignalingState::kHaveRemotePrAnswer) {
EXPECT_TRUE(wrapper->SetRemoteDescription(std::move(pranswer)));
} else {
std::string error;
ASSERT_FALSE(wrapper->SetRemoteDescription(std::move(pranswer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set remote pranswer sdp: Called in wrong state:");
}
}
TEST_P(PeerConnectionSignalingStateTest, SetRemoteAnswer) {
auto wrapper_for_answer =
CreatePeerConnectionInState(SignalingState::kHaveRemoteOffer);
auto answer = wrapper_for_answer->CreateAnswer();
auto wrapper = CreatePeerConnectionUnderTest();
if (wrapper->signaling_state() == SignalingState::kHaveLocalOffer ||
wrapper->signaling_state() == SignalingState::kHaveRemotePrAnswer) {
EXPECT_TRUE(wrapper->SetRemoteDescription(std::move(answer)));
} else {
std::string error;
ASSERT_FALSE(wrapper->SetRemoteDescription(std::move(answer), &error));
EXPECT_PRED_FORMAT2(
AssertStartsWith, error,
"Failed to set remote answer sdp: Called in wrong state:");
}
}
INSTANTIATE_TEST_SUITE_P(PeerConnectionSignalingTest,
PeerConnectionSignalingStateTest,
Combine(Values(SdpSemantics::kPlanB,
SdpSemantics::kUnifiedPlan),
Values(SignalingState::kStable,
SignalingState::kHaveLocalOffer,
SignalingState::kHaveLocalPrAnswer,
SignalingState::kHaveRemoteOffer,
SignalingState::kHaveRemotePrAnswer),
Bool()));
// Test that CreateAnswer fails if a round of offer/answer has been done and
// the PeerConnection is in the stable state.
TEST_P(PeerConnectionSignalingTest, CreateAnswerFailsIfStable) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(caller->ExchangeOfferAnswerWith(callee.get()));
ASSERT_EQ(SignalingState::kStable, caller->signaling_state());
EXPECT_FALSE(caller->CreateAnswer());
ASSERT_EQ(SignalingState::kStable, callee->signaling_state());
EXPECT_FALSE(callee->CreateAnswer());
}
// According to https://tools.ietf.org/html/rfc3264#section-8, the session id
// stays the same but the version must be incremented if a later, different
// session description is generated. These two tests verify that is the case for
// both offers and answers.
TEST_P(PeerConnectionSignalingTest,
SessionVersionIncrementedInSubsequentDifferentOffer) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
auto original_offer = caller->CreateOfferAndSetAsLocal();
const std::string original_id = original_offer->session_id();
const std::string original_version = original_offer->session_version();
ASSERT_TRUE(callee->SetRemoteDescription(std::move(original_offer)));
ASSERT_TRUE(caller->SetRemoteDescription(callee->CreateAnswer()));
// Add track to get a different offer.
caller->AddAudioTrack("a");
auto later_offer = caller->CreateOffer();
EXPECT_EQ(original_id, later_offer->session_id());
EXPECT_LT(rtc::FromString<uint64_t>(original_version),
rtc::FromString<uint64_t>(later_offer->session_version()));
}
TEST_P(PeerConnectionSignalingTest,
SessionVersionIncrementedInSubsequentDifferentAnswer) {
auto caller = CreatePeerConnection();
auto callee = CreatePeerConnection();
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
auto original_answer = callee->CreateAnswer();
const std::string original_id = original_answer->session_id();
const std::string original_version = original_answer->session_version();
// Add track to get a different answer.
callee->AddAudioTrack("a");
auto later_answer = callee->CreateAnswer();
EXPECT_EQ(original_id, later_answer->session_id());
EXPECT_LT(rtc::FromString<uint64_t>(original_version),
rtc::FromString<uint64_t>(later_answer->session_version()));
}
TEST_P(PeerConnectionSignalingTest, InitiatorFlagSetOnCallerAndNotOnCallee) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
EXPECT_FALSE(caller->initial_offerer());
EXPECT_FALSE(callee->initial_offerer());
ASSERT_TRUE(callee->SetRemoteDescription(caller->CreateOfferAndSetAsLocal()));
EXPECT_TRUE(caller->initial_offerer());
EXPECT_FALSE(callee->initial_offerer());
ASSERT_TRUE(
caller->SetRemoteDescription(callee->CreateAnswerAndSetAsLocal()));
EXPECT_TRUE(caller->initial_offerer());
EXPECT_FALSE(callee->initial_offerer());
}
// Test creating a PeerConnection, request multiple offers, destroy the
// PeerConnection and make sure we get success/failure callbacks for all of the
// requests.
// Background: crbug.com/507307
TEST_P(PeerConnectionSignalingTest, CreateOffersAndShutdown) {
auto caller = CreatePeerConnection();
RTCOfferAnswerOptions options;
options.offer_to_receive_audio =
RTCOfferAnswerOptions::kOfferToReceiveMediaTrue;
rtc::scoped_refptr<MockCreateSessionDescriptionObserver> observers[100];
for (auto& observer : observers) {
observer = rtc::make_ref_counted<MockCreateSessionDescriptionObserver>();
caller->pc()->CreateOffer(observer, options);
}
// Destroy the PeerConnection.
caller.reset(nullptr);
for (auto& observer : observers) {
// We expect to have received a notification now even if the PeerConnection
// was terminated. The offer creation may or may not have succeeded, but we
// must have received a notification.
EXPECT_TRUE(observer->called());
}
}
// Similar to the above test, but by closing the PC first the CreateOffer() will
// fail "early", which triggers a codepath where the PeerConnection is
// reponsible for invoking the observer, instead of the normal codepath where
// the WebRtcSessionDescriptionFactory is responsible for it.
TEST_P(PeerConnectionSignalingTest, CloseCreateOfferAndShutdown) {
auto caller = CreatePeerConnection();
auto observer = rtc::make_ref_counted<MockCreateSessionDescriptionObserver>();
caller->pc()->Close();
caller->pc()->CreateOffer(observer, RTCOfferAnswerOptions());
caller.reset(nullptr);
EXPECT_TRUE(observer->called());
}
TEST_P(PeerConnectionSignalingTest,
ImplicitCreateOfferAndShutdownWithOldObserver) {
auto caller = CreatePeerConnection();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(observer.get());
caller.reset(nullptr);
// The old observer does not get invoked because posted messages are lost.
EXPECT_FALSE(observer->called());
}
TEST_P(PeerConnectionSignalingTest, ImplicitCreateOfferAndShutdown) {
auto caller = CreatePeerConnection();
rtc::scoped_refptr<FakeSetLocalDescriptionObserver> observer(
new FakeSetLocalDescriptionObserver());
caller->pc()->SetLocalDescription(observer);
caller.reset(nullptr);
// The new observer gets invoked because it is called immediately.
EXPECT_TRUE(observer->called());
EXPECT_FALSE(observer->error().ok());
}
TEST_P(PeerConnectionSignalingTest,
CloseBeforeImplicitCreateOfferAndShutdownWithOldObserver) {
auto caller = CreatePeerConnection();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->Close();
caller->pc()->SetLocalDescription(observer.get());
caller.reset(nullptr);
// The old observer does not get invoked because posted messages are lost.
EXPECT_FALSE(observer->called());
}
TEST_P(PeerConnectionSignalingTest, CloseBeforeImplicitCreateOfferAndShutdown) {
auto caller = CreatePeerConnection();
rtc::scoped_refptr<FakeSetLocalDescriptionObserver> observer(
new FakeSetLocalDescriptionObserver());
caller->pc()->Close();
caller->pc()->SetLocalDescription(observer);
caller.reset(nullptr);
// The new observer gets invoked because it is called immediately.
EXPECT_TRUE(observer->called());
EXPECT_FALSE(observer->error().ok());
}
TEST_P(PeerConnectionSignalingTest,
CloseAfterImplicitCreateOfferAndShutdownWithOldObserver) {
auto caller = CreatePeerConnection();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(observer.get());
caller->pc()->Close();
caller.reset(nullptr);
// The old observer does not get invoked because posted messages are lost.
EXPECT_FALSE(observer->called());
}
TEST_P(PeerConnectionSignalingTest, CloseAfterImplicitCreateOfferAndShutdown) {
auto caller = CreatePeerConnection();
rtc::scoped_refptr<FakeSetLocalDescriptionObserver> observer(
new FakeSetLocalDescriptionObserver());
caller->pc()->SetLocalDescription(observer);
caller->pc()->Close();
caller.reset(nullptr);
// The new observer gets invoked because it is called immediately.
EXPECT_TRUE(observer->called());
EXPECT_FALSE(observer->error().ok());
}
TEST_P(PeerConnectionSignalingTest,
SetLocalDescriptionNewObserverIsInvokedImmediately) {
auto caller = CreatePeerConnection();
auto offer = caller->CreateOffer(RTCOfferAnswerOptions());
rtc::scoped_refptr<FakeSetLocalDescriptionObserver> observer(
new FakeSetLocalDescriptionObserver());
caller->pc()->SetLocalDescription(std::move(offer), observer);
// The new observer is invoked immediately.
EXPECT_TRUE(observer->called());
EXPECT_TRUE(observer->error().ok());
}
TEST_P(PeerConnectionSignalingTest,
SetLocalDescriptionOldObserverIsInvokedInAPostedMessage) {
auto caller = CreatePeerConnection();
auto offer = caller->CreateOffer(RTCOfferAnswerOptions());
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(observer, offer.release());
// The old observer is not invoked immediately.
EXPECT_FALSE(observer->called());
// Process all currently pending messages by waiting for a posted task to run.
bool checkpoint_reached = false;
rtc::Thread::Current()->PostTask(
RTC_FROM_HERE, [&checkpoint_reached] { checkpoint_reached = true; });
EXPECT_TRUE_WAIT(checkpoint_reached, kWaitTimeout);
// If resolving the observer was pending, it must now have been called.
EXPECT_TRUE(observer->called());
}
TEST_P(PeerConnectionSignalingTest, SetRemoteDescriptionExecutesImmediately) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
// This offer will cause receivers to be created.
auto offer = caller->CreateOffer(RTCOfferAnswerOptions());
// By not waiting for the observer's callback we can verify that the operation
// executed immediately.
callee->pc()->SetRemoteDescription(std::move(offer),
new FakeSetRemoteDescriptionObserver());
EXPECT_EQ(2u, callee->pc()->GetReceivers().size());
}
TEST_P(PeerConnectionSignalingTest, CreateOfferBlocksSetRemoteDescription) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnection();
// This offer will cause receivers to be created.
auto offer = caller->CreateOffer(RTCOfferAnswerOptions());
EXPECT_EQ(0u, callee->pc()->GetReceivers().size());
auto offer_observer =
rtc::make_ref_counted<MockCreateSessionDescriptionObserver>();
// Synchronously invoke CreateOffer() and SetRemoteDescription(). The
// SetRemoteDescription() operation should be chained to be executed
// asynchronously, when CreateOffer() completes.
callee->pc()->CreateOffer(offer_observer, RTCOfferAnswerOptions());
callee->pc()->SetRemoteDescription(std::move(offer),
new FakeSetRemoteDescriptionObserver());
// CreateOffer() is asynchronous; without message processing this operation
// should not have completed.
EXPECT_FALSE(offer_observer->called());
// Due to chaining, the receivers should not have been created by the offer
// yet.
EXPECT_EQ(0u, callee->pc()->GetReceivers().size());
// EXPECT_TRUE_WAIT causes messages to be processed...
EXPECT_TRUE_WAIT(offer_observer->called(), kWaitTimeout);
// Now that the offer has been completed, SetRemoteDescription() will have
// been executed next in the chain.
EXPECT_EQ(2u, callee->pc()->GetReceivers().size());
}
TEST_P(PeerConnectionSignalingTest,
ParameterlessSetLocalDescriptionCreatesOffer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(observer.get());
// The offer is created asynchronously; message processing is needed for it to
// complete.
EXPECT_FALSE(observer->called());
EXPECT_FALSE(caller->pc()->pending_local_description());
EXPECT_EQ(PeerConnection::kStable, caller->signaling_state());
// Wait for messages to be processed.
EXPECT_TRUE_WAIT(observer->called(), kWaitTimeout);
EXPECT_TRUE(observer->result());
EXPECT_TRUE(caller->pc()->pending_local_description());
EXPECT_EQ(SdpType::kOffer,
caller->pc()->pending_local_description()->GetType());
EXPECT_EQ(PeerConnection::kHaveLocalOffer, caller->signaling_state());
}
TEST_P(PeerConnectionSignalingTest,
ParameterlessSetLocalDescriptionCreatesAnswer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
callee->SetRemoteDescription(caller->CreateOffer());
EXPECT_EQ(PeerConnection::kHaveRemoteOffer, callee->signaling_state());
auto observer = MockSetSessionDescriptionObserver::Create();
callee->pc()->SetLocalDescription(observer.get());
// The answer is created asynchronously; message processing is needed for it
// to complete.
EXPECT_FALSE(observer->called());
EXPECT_FALSE(callee->pc()->current_local_description());
// Wait for messages to be processed.
EXPECT_TRUE_WAIT(observer->called(), kWaitTimeout);
EXPECT_TRUE(observer->result());
EXPECT_TRUE(callee->pc()->current_local_description());
EXPECT_EQ(SdpType::kAnswer,
callee->pc()->current_local_description()->GetType());
EXPECT_EQ(PeerConnection::kStable, callee->signaling_state());
}
TEST_P(PeerConnectionSignalingTest,
ParameterlessSetLocalDescriptionFullExchange) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto callee = CreatePeerConnectionWithAudioVideo();
// SetLocalDescription(), implicitly creating an offer.
auto caller_set_local_description_observer =
MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(
caller_set_local_description_observer.get());
EXPECT_TRUE_WAIT(caller_set_local_description_observer->called(),
kWaitTimeout);
ASSERT_TRUE(caller->pc()->pending_local_description());
// SetRemoteDescription(offer)
auto callee_set_remote_description_observer =
MockSetSessionDescriptionObserver::Create();
callee->pc()->SetRemoteDescription(
callee_set_remote_description_observer,
CloneSessionDescription(caller->pc()->pending_local_description())
.release());
// SetLocalDescription(), implicitly creating an answer.
auto callee_set_local_description_observer =
MockSetSessionDescriptionObserver::Create();
callee->pc()->SetLocalDescription(
callee_set_local_description_observer.get());
EXPECT_TRUE_WAIT(callee_set_local_description_observer->called(),
kWaitTimeout);
// Chaining guarantees SetRemoteDescription() happened before
// SetLocalDescription().
EXPECT_TRUE(callee_set_remote_description_observer->called());
EXPECT_TRUE(callee->pc()->current_local_description());
// SetRemoteDescription(answer)
auto caller_set_remote_description_observer =
MockSetSessionDescriptionObserver::Create();
caller->pc()->SetRemoteDescription(
caller_set_remote_description_observer,
CloneSessionDescription(callee->pc()->current_local_description())
.release());
EXPECT_TRUE_WAIT(caller_set_remote_description_observer->called(),
kWaitTimeout);
EXPECT_EQ(PeerConnection::kStable, caller->signaling_state());
EXPECT_EQ(PeerConnection::kStable, callee->signaling_state());
}
TEST_P(PeerConnectionSignalingTest,
ParameterlessSetLocalDescriptionCloseBeforeCreatingOffer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->Close();
caller->pc()->SetLocalDescription(observer.get());
// The operation should fail asynchronously.
EXPECT_FALSE(observer->called());
EXPECT_TRUE_WAIT(observer->called(), kWaitTimeout);
EXPECT_FALSE(observer->result());
// This did not affect the signaling state.
EXPECT_EQ(PeerConnection::kClosed, caller->pc()->signaling_state());
EXPECT_EQ(
"SetLocalDescription failed to create session description - "
"SetLocalDescription called when PeerConnection is closed.",
observer->error());
}
TEST_P(PeerConnectionSignalingTest,
ParameterlessSetLocalDescriptionCloseWhileCreatingOffer) {
auto caller = CreatePeerConnectionWithAudioVideo();
auto observer = MockSetSessionDescriptionObserver::Create();
caller->pc()->SetLocalDescription(observer.get());
caller->pc()->Close();
// The operation should fail asynchronously.
EXPECT_FALSE(observer->called());
EXPECT_TRUE_WAIT(observer->called(), kWaitTimeout);
EXPECT_FALSE(observer->result());
// This did not affect the signaling state.
EXPECT_EQ(PeerConnection::kClosed, caller->pc()->signaling_state());
EXPECT_EQ(
"SetLocalDescription failed to create session description - "
"CreateOffer failed because the session was shut down",
observer->error());
}
TEST_P(PeerConnectionSignalingTest, UnsupportedContentType) {
auto caller = CreatePeerConnection();
// Call setRemoteDescription with a m= line we don't understand.
std::string sdp =
"v=0\r\n"
"o=- 18446744069414584320 18446462598732840960 IN IP4 127.0.0.1\r\n"
"s=-\r\n"
"t=0 0\r\n"
"m=bogus 9 FOO 0 8\r\n"
"c=IN IP4 0.0.0.0\r\n"
"a=mid:bogusmid\r\n";
std::unique_ptr<webrtc::SessionDescriptionInterface> remote_description =
webrtc::CreateSessionDescription(SdpType::kOffer, sdp, nullptr);
EXPECT_TRUE(caller->SetRemoteDescription(std::move(remote_description)));
// Assert we respond back with something meaningful.
auto answer = caller->CreateAnswer();
ASSERT_EQ(answer->description()->contents().size(), 1u);
EXPECT_NE(answer->description()
->contents()[0]
.media_description()
->as_unsupported(),
nullptr);
EXPECT_EQ(answer->description()
->contents()[0]
.media_description()
->as_unsupported()
->media_type(),
"bogus");
EXPECT_TRUE(answer->description()->contents()[0].rejected);
EXPECT_EQ(answer->description()->contents()[0].mid(), "bogusmid");
EXPECT_EQ(
answer->description()->contents()[0].media_description()->protocol(),
"FOO");
EXPECT_FALSE(
answer->description()->contents()[0].media_description()->has_codecs());
EXPECT_TRUE(caller->SetLocalDescription(std::move(answer)));
// Assert we keep this in susequent offers.
auto offer = caller->CreateOffer();
EXPECT_EQ(offer->description()
->contents()[0]
.media_description()
->as_unsupported()
->media_type(),
"bogus");
EXPECT_TRUE(offer->description()->contents()[0].rejected);
EXPECT_EQ(offer->description()->contents()[0].media_description()->protocol(),
"FOO");
EXPECT_EQ(offer->description()->contents()[0].mid(), "bogusmid");
EXPECT_FALSE(
offer->description()->contents()[0].media_description()->has_codecs());
EXPECT_TRUE(caller->SetLocalDescription(std::move(offer)));
}
TEST_P(PeerConnectionSignalingTest, ReceiveFlexFec) {
auto caller = CreatePeerConnection();
std::string sdp =
"v=0\r\n"
"o=- 8403615332048243445 2 IN IP4 127.0.0.1\r\n"
"s=-\r\n"
"t=0 0\r\n"
"a=group:BUNDLE 0\r\n"
"m=video 9 UDP/TLS/RTP/SAVPF 102 122\r\n"
"c=IN IP4 0.0.0.0\r\n"
"a=rtcp:9 IN IP4 0.0.0.0\r\n"
"a=ice-ufrag:IZeV\r\n"
"a=ice-pwd:uaZhQD4rYM/Tta2qWBT1Bbt4\r\n"
"a=ice-options:trickle\r\n"
"a=fingerprint:sha-256 "
"D8:6C:3D:FA:23:E2:2C:63:11:2D:D0:86:BE:C4:D0:65:F9:42:F7:1C:06:04:27:E6:"
"1C:2C:74:01:8D:50:67:23\r\n"
"a=setup:actpass\r\n"
"a=mid:0\r\n"
"a=sendrecv\r\n"
"a=msid:stream track\r\n"
"a=rtcp-mux\r\n"
"a=rtcp-rsize\r\n"
"a=rtpmap:102 VP8/90000\r\n"
"a=rtcp-fb:102 goog-remb\r\n"
"a=rtcp-fb:102 transport-cc\r\n"
"a=rtcp-fb:102 ccm fir\r\n"
"a=rtcp-fb:102 nack\r\n"
"a=rtcp-fb:102 nack pli\r\n"
"a=rtpmap:122 flexfec-03/90000\r\n"
"a=fmtp:122 repair-window=10000000\r\n"
"a=ssrc-group:FEC-FR 1224551896 1953032773\r\n"
"a=ssrc:1224551896 cname:/exJcmhSLpyu9FgV\r\n"
"a=ssrc:1953032773 cname:/exJcmhSLpyu9FgV\r\n";
std::unique_ptr<webrtc::SessionDescriptionInterface> remote_description =
webrtc::CreateSessionDescription(SdpType::kOffer, sdp, nullptr);
EXPECT_TRUE(caller->SetRemoteDescription(std::move(remote_description)));
auto answer = caller->CreateAnswer();
ASSERT_EQ(answer->description()->contents().size(), 1u);
ASSERT_NE(
answer->description()->contents()[0].media_description()->as_video(),
nullptr);
auto codecs = answer->description()
->contents()[0]
.media_description()
->as_video()
->codecs();
ASSERT_EQ(codecs.size(), 2u);
EXPECT_EQ(codecs[1].name, "flexfec-03");
EXPECT_TRUE(caller->SetLocalDescription(std::move(answer)));
}
TEST_P(PeerConnectionSignalingTest, ReceiveFlexFecReoffer) {
auto caller = CreatePeerConnection();
std::string sdp =
"v=0\r\n"
"o=- 8403615332048243445 2 IN IP4 127.0.0.1\r\n"
"s=-\r\n"
"t=0 0\r\n"
"a=group:BUNDLE 0\r\n"
"m=video 9 UDP/TLS/RTP/SAVPF 102 35\r\n"
"c=IN IP4 0.0.0.0\r\n"
"a=rtcp:9 IN IP4 0.0.0.0\r\n"
"a=ice-ufrag:IZeV\r\n"
"a=ice-pwd:uaZhQD4rYM/Tta2qWBT1Bbt4\r\n"
"a=ice-options:trickle\r\n"
"a=fingerprint:sha-256 "
"D8:6C:3D:FA:23:E2:2C:63:11:2D:D0:86:BE:C4:D0:65:F9:42:F7:1C:06:04:27:E6:"
"1C:2C:74:01:8D:50:67:23\r\n"
"a=setup:actpass\r\n"
"a=mid:0\r\n"
"a=sendrecv\r\n"
"a=msid:stream track\r\n"
"a=rtcp-mux\r\n"
"a=rtcp-rsize\r\n"
"a=rtpmap:102 VP8/90000\r\n"
"a=rtcp-fb:102 goog-remb\r\n"
"a=rtcp-fb:102 transport-cc\r\n"
"a=rtcp-fb:102 ccm fir\r\n"
"a=rtcp-fb:102 nack\r\n"
"a=rtcp-fb:102 nack pli\r\n"
"a=rtpmap:35 flexfec-03/90000\r\n"
"a=fmtp:35 repair-window=10000000\r\n"
"a=ssrc-group:FEC-FR 1224551896 1953032773\r\n"
"a=ssrc:1224551896 cname:/exJcmhSLpyu9FgV\r\n"
"a=ssrc:1953032773 cname:/exJcmhSLpyu9FgV\r\n";
std::unique_ptr<webrtc::SessionDescriptionInterface> remote_description =
webrtc::CreateSessionDescription(SdpType::kOffer, sdp, nullptr);
EXPECT_TRUE(caller->SetRemoteDescription(std::move(remote_description)));
auto answer = caller->CreateAnswer();
ASSERT_EQ(answer->description()->contents().size(), 1u);