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channel_unittest.cc
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/*
* Copyright 2009 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.
*/
#include "pc/channel.h"
#include <stddef.h>
#include <cstdint>
#include <string>
#include <type_traits>
#include "absl/functional/any_invocable.h"
#include "api/array_view.h"
#include "api/audio_options.h"
#include "api/rtp_parameters.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "media/base/codec.h"
#include "media/base/fake_media_engine.h"
#include "media/base/fake_rtp.h"
#include "media/base/media_channel.h"
#include "media/base/media_constants.h"
#include "media/base/rid_description.h"
#include "p2p/base/candidate_pair_interface.h"
#include "p2p/base/dtls_transport_internal.h"
#include "p2p/base/fake_dtls_transport.h"
#include "p2p/base/fake_packet_transport.h"
#include "p2p/base/ice_transport_internal.h"
#include "p2p/base/p2p_constants.h"
#include "p2p/base/packet_transport_internal.h"
#include "pc/dtls_srtp_transport.h"
#include "pc/jsep_transport.h"
#include "pc/rtp_transport.h"
#include "rtc_base/arraysize.h"
#include "rtc_base/buffer.h"
#include "rtc_base/byte_order.h"
#include "rtc_base/checks.h"
#include "rtc_base/rtc_certificate.h"
#include "rtc_base/ssl_identity.h"
#include "rtc_base/task_queue_for_test.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/scoped_key_value_config.h"
namespace {
using ::cricket::DtlsTransportInternal;
using ::cricket::FakeVoiceMediaReceiveChannel;
using ::cricket::FakeVoiceMediaSendChannel;
using ::cricket::RidDescription;
using ::cricket::RidDirection;
using ::cricket::StreamParams;
using ::testing::AllOf;
using ::testing::ElementsAre;
using ::testing::Field;
using ::webrtc::RtpTransceiverDirection;
using ::webrtc::SdpType;
const cricket::Codec kPcmuCodec =
cricket::CreateAudioCodec(0, "PCMU", 64000, 1);
const cricket::Codec kPcmaCodec =
cricket::CreateAudioCodec(8, "PCMA", 64000, 1);
const cricket::Codec kIsacCodec =
cricket::CreateAudioCodec(103, "ISAC", 40000, 1);
const cricket::Codec kH264Codec = cricket::CreateVideoCodec(97, "H264");
const cricket::Codec kH264SvcCodec = cricket::CreateVideoCodec(99, "H264-SVC");
const uint32_t kSsrc1 = 0x1111;
const uint32_t kSsrc2 = 0x2222;
const uint32_t kSsrc3 = 0x3333;
const uint32_t kSsrc4 = 0x4444;
const int kAudioPts[] = {0, 8};
const int kVideoPts[] = {97, 99};
enum class NetworkIsWorker { Yes, No };
template <class ChannelT,
class MediaSendChannelT,
class MediaReceiveChannelT,
class MediaSendChannelInterfaceT,
class MediaReceiveChannelInterfaceT,
class ContentT,
class MediaInfoT,
class OptionsT>
class Traits {
public:
typedef ChannelT Channel;
typedef MediaSendChannelT MediaSendChannel;
typedef MediaReceiveChannelT MediaReceiveChannel;
typedef MediaSendChannelInterfaceT MediaSendChannelInterface;
typedef MediaReceiveChannelInterfaceT MediaReceiveChannelInterface;
typedef ContentT Content;
typedef MediaInfoT MediaInfo;
typedef OptionsT Options;
};
class VoiceTraits : public Traits<cricket::VoiceChannel,
cricket::FakeVoiceMediaSendChannel,
cricket::FakeVoiceMediaReceiveChannel,
cricket::VoiceMediaSendChannelInterface,
cricket::VoiceMediaReceiveChannelInterface,
cricket::AudioContentDescription,
cricket::VoiceMediaInfo,
cricket::AudioOptions> {};
class VideoTraits : public Traits<cricket::VideoChannel,
cricket::FakeVideoMediaSendChannel,
cricket::FakeVideoMediaReceiveChannel,
cricket::VideoMediaSendChannelInterface,
cricket::VideoMediaReceiveChannelInterface,
cricket::VideoContentDescription,
cricket::VideoMediaInfo,
cricket::VideoOptions> {};
// Base class for Voice/Video tests
template <class T>
class ChannelTest : public ::testing::Test, public sigslot::has_slots<> {
public:
enum Flags {
RTCP_MUX = 0x1,
SSRC_MUX = 0x8,
DTLS = 0x10,
// Use BaseChannel with PacketTransportInternal rather than
// DtlsTransportInternal.
RAW_PACKET_TRANSPORT = 0x20,
};
ChannelTest(bool verify_playout,
rtc::ArrayView<const uint8_t> rtp_data,
rtc::ArrayView<const uint8_t> rtcp_data,
NetworkIsWorker network_is_worker)
: verify_playout_(verify_playout),
rtp_packet_(rtp_data.data(), rtp_data.size()),
rtcp_packet_(rtcp_data.data(), rtcp_data.size()) {
if (network_is_worker == NetworkIsWorker::Yes) {
network_thread_ = rtc::Thread::Current();
} else {
network_thread_keeper_ = rtc::Thread::Create();
network_thread_keeper_->SetName("Network", nullptr);
network_thread_ = network_thread_keeper_.get();
}
RTC_DCHECK(network_thread_);
}
~ChannelTest() {
if (network_thread_) {
SendTask(network_thread_, [this]() {
network_thread_safety_->SetNotAlive();
DeinitChannels();
// Transports must be created and destroyed on the network thread.
fake_rtp_dtls_transport1_ = nullptr;
fake_rtcp_dtls_transport1_ = nullptr;
fake_rtp_dtls_transport2_ = nullptr;
fake_rtcp_dtls_transport2_ = nullptr;
fake_rtp_packet_transport1_ = nullptr;
fake_rtcp_packet_transport1_ = nullptr;
fake_rtp_packet_transport2_ = nullptr;
fake_rtcp_packet_transport2_ = nullptr;
rtp_transport1_ = nullptr;
rtp_transport2_ = nullptr;
new_rtp_transport_ = nullptr;
});
}
}
void CreateChannels(int flags1, int flags2) {
CreateChannels(std::make_unique<typename T::MediaSendChannel>(
typename T::Options(), network_thread_),
std::make_unique<typename T::MediaReceiveChannel>(
typename T::Options(), network_thread_),
std::make_unique<typename T::MediaSendChannel>(
typename T::Options(), network_thread_),
std::make_unique<typename T::MediaReceiveChannel>(
typename T::Options(), network_thread_),
flags1, flags2);
}
void CreateChannels(std::unique_ptr<typename T::MediaSendChannel> ch1s,
std::unique_ptr<typename T::MediaReceiveChannel> ch1r,
std::unique_ptr<typename T::MediaSendChannel> ch2s,
std::unique_ptr<typename T::MediaReceiveChannel> ch2r,
int flags1,
int flags2) {
RTC_DCHECK(!channel1_);
RTC_DCHECK(!channel2_);
// Network thread is started in CreateChannels, to allow the test to
// configure a fake clock before any threads are spawned and attempt to
// access the time.
if (network_thread_keeper_) {
network_thread_keeper_->Start();
}
// Make sure if using raw packet transports, they're used for both
// channels.
RTC_DCHECK_EQ(flags1 & RAW_PACKET_TRANSPORT, flags2 & RAW_PACKET_TRANSPORT);
rtc::Thread* worker_thread = rtc::Thread::Current();
network_thread_->BlockingCall([&] {
// Based on flags, create fake DTLS or raw packet transports.
if (flags1 & RAW_PACKET_TRANSPORT) {
fake_rtp_packet_transport1_.reset(
new rtc::FakePacketTransport("channel1_rtp"));
if (!(flags1 & RTCP_MUX)) {
fake_rtcp_packet_transport1_.reset(
new rtc::FakePacketTransport("channel1_rtcp"));
}
} else {
// Confirmed to work with KT_RSA and KT_ECDSA.
fake_rtp_dtls_transport1_.reset(new cricket::FakeDtlsTransport(
"channel1", cricket::ICE_CANDIDATE_COMPONENT_RTP, network_thread_));
if (!(flags1 & RTCP_MUX)) {
fake_rtcp_dtls_transport1_.reset(new cricket::FakeDtlsTransport(
"channel1", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
network_thread_));
}
if (flags1 & DTLS) {
auto cert1 = rtc::RTCCertificate::Create(
rtc::SSLIdentity::Create("session1", rtc::KT_DEFAULT));
fake_rtp_dtls_transport1_->SetLocalCertificate(cert1);
if (fake_rtcp_dtls_transport1_) {
fake_rtcp_dtls_transport1_->SetLocalCertificate(cert1);
}
}
}
// Based on flags, create fake DTLS or raw packet transports.
if (flags2 & RAW_PACKET_TRANSPORT) {
fake_rtp_packet_transport2_.reset(
new rtc::FakePacketTransport("channel2_rtp"));
if (!(flags2 & RTCP_MUX)) {
fake_rtcp_packet_transport2_.reset(
new rtc::FakePacketTransport("channel2_rtcp"));
}
} else {
// Confirmed to work with KT_RSA and KT_ECDSA.
fake_rtp_dtls_transport2_.reset(new cricket::FakeDtlsTransport(
"channel2", cricket::ICE_CANDIDATE_COMPONENT_RTP, network_thread_));
if (!(flags2 & RTCP_MUX)) {
fake_rtcp_dtls_transport2_.reset(new cricket::FakeDtlsTransport(
"channel2", cricket::ICE_CANDIDATE_COMPONENT_RTCP,
network_thread_));
}
if (flags2 & DTLS) {
auto cert2 = rtc::RTCCertificate::Create(
rtc::SSLIdentity::Create("session2", rtc::KT_DEFAULT));
fake_rtp_dtls_transport2_->SetLocalCertificate(cert2);
if (fake_rtcp_dtls_transport2_) {
fake_rtcp_dtls_transport2_->SetLocalCertificate(cert2);
}
}
}
rtp_transport1_ = CreateRtpTransportBasedOnFlags(
fake_rtp_packet_transport1_.get(), fake_rtcp_packet_transport1_.get(),
fake_rtp_dtls_transport1_.get(), fake_rtcp_dtls_transport1_.get(),
flags1);
rtp_transport2_ = CreateRtpTransportBasedOnFlags(
fake_rtp_packet_transport2_.get(), fake_rtcp_packet_transport2_.get(),
fake_rtp_dtls_transport2_.get(), fake_rtcp_dtls_transport2_.get(),
flags2);
});
channel1_ = CreateChannel(worker_thread, network_thread_, std::move(ch1s),
std::move(ch1r), rtp_transport1_.get(), flags1);
channel2_ = CreateChannel(worker_thread, network_thread_, std::move(ch2s),
std::move(ch2r), rtp_transport2_.get(), flags2);
CreateContent(flags1, kPcmuCodec, kH264Codec, &local_media_content1_);
CreateContent(flags2, kPcmuCodec, kH264Codec, &local_media_content2_);
CopyContent(local_media_content1_, &remote_media_content1_);
CopyContent(local_media_content2_, &remote_media_content2_);
// Add stream information (SSRC) to the local content but not to the remote
// content. This means that we per default know the SSRC of what we send but
// not what we receive.
AddLegacyStreamInContent(kSsrc1, flags1, &local_media_content1_);
AddLegacyStreamInContent(kSsrc2, flags2, &local_media_content2_);
// If SSRC_MUX is used we also need to know the SSRC of the incoming stream.
if (flags1 & SSRC_MUX) {
AddLegacyStreamInContent(kSsrc1, flags1, &remote_media_content1_);
}
if (flags2 & SSRC_MUX) {
AddLegacyStreamInContent(kSsrc2, flags2, &remote_media_content2_);
}
}
std::unique_ptr<typename T::Channel> CreateChannel(
rtc::Thread* worker_thread,
rtc::Thread* network_thread,
std::unique_ptr<typename T::MediaSendChannel> ch_send,
std::unique_ptr<typename T::MediaReceiveChannel> ch_receive,
webrtc::RtpTransportInternal* rtp_transport,
int flags);
std::unique_ptr<webrtc::RtpTransportInternal> CreateRtpTransportBasedOnFlags(
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport,
DtlsTransportInternal* rtp_dtls_transport,
DtlsTransportInternal* rtcp_dtls_transport,
int flags) {
if (flags & RTCP_MUX) {
rtcp_packet_transport = nullptr;
rtcp_dtls_transport = nullptr;
}
if (flags & DTLS) {
return CreateDtlsSrtpTransport(rtp_dtls_transport, rtcp_dtls_transport);
} else {
if (flags & RAW_PACKET_TRANSPORT) {
return CreateUnencryptedTransport(rtp_packet_transport,
rtcp_packet_transport);
} else {
return CreateUnencryptedTransport(rtp_dtls_transport,
rtcp_dtls_transport);
}
}
}
// Unininitializes the channels on the network thread.
void DeinitChannels() {
if (!channel1_ && !channel2_)
return;
SendTask(network_thread_, [this]() {
if (channel1_) {
RTC_DCHECK_RUN_ON(channel1_->network_thread());
channel1_->SetRtpTransport(nullptr);
}
if (channel2_) {
RTC_DCHECK_RUN_ON(channel2_->network_thread());
channel2_->SetRtpTransport(nullptr);
}
});
}
std::unique_ptr<webrtc::RtpTransport> CreateUnencryptedTransport(
rtc::PacketTransportInternal* rtp_packet_transport,
rtc::PacketTransportInternal* rtcp_packet_transport) {
auto rtp_transport = std::make_unique<webrtc::RtpTransport>(
rtcp_packet_transport == nullptr);
SendTask(network_thread_,
[&rtp_transport, rtp_packet_transport, rtcp_packet_transport] {
rtp_transport->SetRtpPacketTransport(rtp_packet_transport);
if (rtcp_packet_transport) {
rtp_transport->SetRtcpPacketTransport(rtcp_packet_transport);
}
});
return rtp_transport;
}
std::unique_ptr<webrtc::DtlsSrtpTransport> CreateDtlsSrtpTransport(
cricket::DtlsTransportInternal* rtp_dtls_transport,
cricket::DtlsTransportInternal* rtcp_dtls_transport) {
auto dtls_srtp_transport = std::make_unique<webrtc::DtlsSrtpTransport>(
rtcp_dtls_transport == nullptr, field_trials_);
SendTask(network_thread_,
[&dtls_srtp_transport, rtp_dtls_transport, rtcp_dtls_transport] {
dtls_srtp_transport->SetDtlsTransports(rtp_dtls_transport,
rtcp_dtls_transport);
});
return dtls_srtp_transport;
}
void ConnectFakeTransports() {
SendTask(network_thread_, [this] {
bool asymmetric = false;
// Depending on test flags, could be using DTLS or raw packet transport.
if (fake_rtp_dtls_transport1_ && fake_rtp_dtls_transport2_) {
fake_rtp_dtls_transport1_->SetDestination(
fake_rtp_dtls_transport2_.get(), asymmetric);
}
if (fake_rtcp_dtls_transport1_ && fake_rtcp_dtls_transport2_) {
fake_rtcp_dtls_transport1_->SetDestination(
fake_rtcp_dtls_transport2_.get(), asymmetric);
}
if (fake_rtp_packet_transport1_ && fake_rtp_packet_transport2_) {
fake_rtp_packet_transport1_->SetDestination(
fake_rtp_packet_transport2_.get(), asymmetric);
}
if (fake_rtcp_packet_transport1_ && fake_rtcp_packet_transport2_) {
fake_rtcp_packet_transport1_->SetDestination(
fake_rtcp_packet_transport2_.get(), asymmetric);
}
});
// The transport becoming writable will asynchronously update the send state
// on the worker thread; since this test uses the main thread as the worker
// thread, we must process the message queue for this to occur.
WaitForThreads();
}
bool SendInitiate() {
std::string err;
bool result = channel1_->SetLocalContent(&local_media_content1_,
SdpType::kOffer, err);
if (result) {
channel1_->Enable(true);
FlushCurrentThread();
result = channel2_->SetRemoteContent(&remote_media_content1_,
SdpType::kOffer, err);
if (result) {
ConnectFakeTransports();
result = channel2_->SetLocalContent(&local_media_content2_,
SdpType::kAnswer, err);
}
}
return result;
}
bool SendAccept() {
channel2_->Enable(true);
FlushCurrentThread();
std::string err;
return channel1_->SetRemoteContent(&remote_media_content2_,
SdpType::kAnswer, err);
}
bool SendOffer() {
std::string err;
bool result = channel1_->SetLocalContent(&local_media_content1_,
SdpType::kOffer, err);
if (result) {
channel1_->Enable(true);
result = channel2_->SetRemoteContent(&remote_media_content1_,
SdpType::kOffer, err);
}
return result;
}
bool SendProvisionalAnswer() {
std::string err;
bool result = channel2_->SetLocalContent(&local_media_content2_,
SdpType::kPrAnswer, err);
if (result) {
channel2_->Enable(true);
result = channel1_->SetRemoteContent(&remote_media_content2_,
SdpType::kPrAnswer, err);
ConnectFakeTransports();
}
return result;
}
bool SendFinalAnswer() {
std::string err;
bool result = channel2_->SetLocalContent(&local_media_content2_,
SdpType::kAnswer, err);
if (result) {
result = channel1_->SetRemoteContent(&remote_media_content2_,
SdpType::kAnswer, err);
}
return result;
}
void SendRtp(typename T::MediaSendChannel* media_channel, rtc::Buffer data) {
network_thread_->PostTask(webrtc::SafeTask(
network_thread_safety_, [media_channel, data = std::move(data)]() {
media_channel->SendPacket(data.data(), data.size(),
rtc::PacketOptions());
}));
}
void SendRtp1() {
SendRtp1(rtc::Buffer(rtp_packet_.data(), rtp_packet_.size()));
}
void SendRtp1(rtc::Buffer data) {
SendRtp(media_send_channel1_impl(), std::move(data));
}
void SendRtp2() {
SendRtp2(rtc::Buffer(rtp_packet_.data(), rtp_packet_.size()));
}
void SendRtp2(rtc::Buffer data) {
SendRtp(media_send_channel2_impl(), std::move(data));
}
// Methods to send custom data.
void SendCustomRtp1(uint32_t ssrc, int sequence_number, int pl_type = -1) {
SendRtp1(CreateRtpData(ssrc, sequence_number, pl_type));
}
void SendCustomRtp2(uint32_t ssrc, int sequence_number, int pl_type = -1) {
SendRtp2(CreateRtpData(ssrc, sequence_number, pl_type));
}
bool CheckRtp1() {
return media_receive_channel1_impl()->CheckRtp(rtp_packet_.data(),
rtp_packet_.size());
}
bool CheckRtp2() {
return media_receive_channel2_impl()->CheckRtp(rtp_packet_.data(),
rtp_packet_.size());
}
// Methods to check custom data.
bool CheckCustomRtp1(uint32_t ssrc, int sequence_number, int pl_type = -1) {
rtc::Buffer data = CreateRtpData(ssrc, sequence_number, pl_type);
return media_receive_channel1_impl()->CheckRtp(data.data(), data.size());
}
bool CheckCustomRtp2(uint32_t ssrc, int sequence_number, int pl_type = -1) {
rtc::Buffer data = CreateRtpData(ssrc, sequence_number, pl_type);
return media_receive_channel2_impl()->CheckRtp(data.data(), data.size());
}
rtc::Buffer CreateRtpData(uint32_t ssrc, int sequence_number, int pl_type) {
rtc::Buffer data(rtp_packet_.data(), rtp_packet_.size());
// Set SSRC in the rtp packet copy.
rtc::SetBE32(data.data() + 8, ssrc);
rtc::SetBE16(data.data() + 2, sequence_number);
if (pl_type >= 0) {
rtc::Set8(data.data(), 1, static_cast<uint8_t>(pl_type));
}
return data;
}
bool CheckNoRtp1() { return media_send_channel1_impl()->CheckNoRtp(); }
bool CheckNoRtp2() { return media_send_channel2_impl()->CheckNoRtp(); }
void CreateContent(int flags,
const cricket::Codec& audio_codec,
const cricket::Codec& video_codec,
typename T::Content* content) {
// overridden in specialized classes
}
void CopyContent(const typename T::Content& source,
typename T::Content* content) {
// overridden in specialized classes
}
// Creates a MediaContent with one stream.
// kPcmuCodec is used as audio codec and kH264Codec is used as video codec.
typename T::Content* CreateMediaContentWithStream(uint32_t ssrc) {
typename T::Content* content = new typename T::Content();
CreateContent(0, kPcmuCodec, kH264Codec, content);
AddLegacyStreamInContent(ssrc, 0, content);
return content;
}
// Will manage the lifetime of a CallThread, making sure it's
// destroyed before this object goes out of scope.
class ScopedCallThread {
public:
explicit ScopedCallThread(absl::AnyInvocable<void() &&> functor)
: thread_(rtc::Thread::Create()) {
thread_->Start();
thread_->PostTask(std::move(functor));
}
~ScopedCallThread() { thread_->Stop(); }
rtc::Thread* thread() { return thread_.get(); }
private:
std::unique_ptr<rtc::Thread> thread_;
};
cricket::CandidatePairInterface* last_selected_candidate_pair() {
return last_selected_candidate_pair_;
}
void AddLegacyStreamInContent(uint32_t ssrc,
int flags,
typename T::Content* content) {
// Base implementation.
}
// Utility method that calls BaseChannel::srtp_active() on the network thread
// and returns the result. The `srtp_active()` state is maintained on the
// network thread, which callers need to factor in.
bool IsSrtpActive(std::unique_ptr<typename T::Channel>& channel) {
RTC_DCHECK(channel.get());
bool result;
SendTask(network_thread_, [&] { result = channel->srtp_active(); });
return result;
}
// Returns true iff the transport is set for a channel and rtcp_mux_enabled()
// returns true.
bool IsRtcpMuxEnabled(std::unique_ptr<typename T::Channel>& channel) {
RTC_DCHECK(channel.get());
bool result;
SendTask(network_thread_, [&] {
result = channel->rtp_transport() &&
channel->rtp_transport()->rtcp_mux_enabled();
});
return result;
}
// Tests that can be used by derived classes.
// Basic sanity check.
void TestInit() {
CreateChannels(0, 0);
EXPECT_FALSE(IsSrtpActive(channel1_));
EXPECT_FALSE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel1_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->send_codecs().empty());
EXPECT_TRUE(media_receive_channel1_impl()->recv_streams().empty());
EXPECT_TRUE(media_send_channel1_impl()->rtp_packets().empty());
// Basic sanity test for send and receive channel objects
EXPECT_EQ(channel1_->media_send_channel()->media_type(),
media_send_channel1_impl()->media_type());
EXPECT_EQ(channel1_->media_receive_channel()->media_type(),
media_receive_channel1_impl()->media_type());
EXPECT_EQ(channel1_->media_send_channel()->media_type(),
channel1_->media_receive_channel()->media_type());
}
// Test that SetLocalContent and SetRemoteContent properly configure
// the codecs.
void TestSetContents() {
CreateChannels(0, 0);
typename T::Content content;
CreateContent(0, kPcmuCodec, kH264Codec, &content);
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content, SdpType::kOffer, err));
EXPECT_EQ(0U, media_send_channel1_impl()->send_codecs().size());
EXPECT_TRUE(channel1_->SetRemoteContent(&content, SdpType::kAnswer, err));
ASSERT_EQ(1U, media_send_channel1_impl()->send_codecs().size());
EXPECT_EQ(content.codecs()[0],
media_send_channel1_impl()->send_codecs()[0]);
}
// Test that SetLocalContent and SetRemoteContent properly configure
// extmap-allow-mixed.
void TestSetContentsExtmapAllowMixedCaller(bool offer, bool answer) {
// For a caller, SetLocalContent() is called first with an offer and next
// SetRemoteContent() is called with the answer.
CreateChannels(0, 0);
typename T::Content content;
CreateContent(0, kPcmuCodec, kH264Codec, &content);
auto offer_enum = offer ? (T::Content::kSession) : (T::Content::kNo);
auto answer_enum = answer ? (T::Content::kSession) : (T::Content::kNo);
content.set_extmap_allow_mixed_enum(offer_enum);
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content, SdpType::kOffer, err));
content.set_extmap_allow_mixed_enum(answer_enum);
EXPECT_TRUE(channel1_->SetRemoteContent(&content, SdpType::kAnswer, err));
EXPECT_EQ(answer, media_send_channel1_impl()->ExtmapAllowMixed());
}
void TestSetContentsExtmapAllowMixedCallee(bool offer, bool answer) {
// For a callee, SetRemoteContent() is called first with an offer and next
// SetLocalContent() is called with the answer.
CreateChannels(0, 0);
typename T::Content content;
CreateContent(0, kPcmuCodec, kH264Codec, &content);
auto offer_enum = offer ? (T::Content::kSession) : (T::Content::kNo);
auto answer_enum = answer ? (T::Content::kSession) : (T::Content::kNo);
content.set_extmap_allow_mixed_enum(offer_enum);
std::string err;
EXPECT_TRUE(channel1_->SetRemoteContent(&content, SdpType::kOffer, err));
content.set_extmap_allow_mixed_enum(answer_enum);
EXPECT_TRUE(channel1_->SetLocalContent(&content, SdpType::kAnswer, err));
EXPECT_EQ(answer, media_send_channel1()->ExtmapAllowMixed());
}
// Test that SetLocalContent and SetRemoteContent properly deals
// with an empty offer.
void TestSetContentsNullOffer() {
CreateChannels(0, 0);
typename T::Content content;
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content, SdpType::kOffer, err));
CreateContent(0, kPcmuCodec, kH264Codec, &content);
EXPECT_EQ(0U, media_send_channel1_impl()->send_codecs().size());
EXPECT_TRUE(channel1_->SetRemoteContent(&content, SdpType::kAnswer, err));
ASSERT_EQ(1U, media_send_channel1_impl()->send_codecs().size());
EXPECT_EQ(content.codecs()[0],
media_send_channel1_impl()->send_codecs()[0]);
}
// Test that SetLocalContent and SetRemoteContent properly set RTCP
// mux.
void TestSetContentsRtcpMux() {
CreateChannels(0, 0);
typename T::Content content;
CreateContent(0, kPcmuCodec, kH264Codec, &content);
// Both sides agree on mux. Should no longer be a separate RTCP channel.
content.set_rtcp_mux(true);
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content, SdpType::kOffer, err));
EXPECT_TRUE(channel1_->SetRemoteContent(&content, SdpType::kAnswer, err));
// Only initiator supports mux. Should still have a separate RTCP channel.
EXPECT_TRUE(channel2_->SetLocalContent(&content, SdpType::kOffer, err));
content.set_rtcp_mux(false);
EXPECT_TRUE(channel2_->SetRemoteContent(&content, SdpType::kAnswer, err));
}
// Test that SetLocalContent and SetRemoteContent properly
// handles adding and removing StreamParams when the action is a full
// SdpType::kOffer / SdpType::kAnswer.
void TestChangeStreamParamsInContent() {
cricket::StreamParams stream1;
stream1.id = "stream1";
stream1.ssrcs.push_back(kSsrc1);
stream1.cname = "stream1_cname";
cricket::StreamParams stream2;
stream2.id = "stream2";
stream2.ssrcs.push_back(kSsrc2);
stream2.cname = "stream2_cname";
// Setup a call where channel 1 send `stream1` to channel 2.
CreateChannels(0, 0);
typename T::Content content1;
CreateContent(0, kPcmuCodec, kH264Codec, &content1);
content1.AddStream(stream1);
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content1, SdpType::kOffer, err));
channel1_->Enable(true);
EXPECT_EQ(1u, media_send_channel1_impl()->send_streams().size());
EXPECT_TRUE(channel2_->SetRemoteContent(&content1, SdpType::kOffer, err));
EXPECT_EQ(1u, media_receive_channel2_impl()->recv_streams().size());
ConnectFakeTransports();
// Channel 2 do not send anything.
typename T::Content content2;
CreateContent(0, kPcmuCodec, kH264Codec, &content2);
EXPECT_TRUE(channel1_->SetRemoteContent(&content2, SdpType::kAnswer, err));
EXPECT_EQ(0u, media_receive_channel1_impl()->recv_streams().size());
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kAnswer, err));
channel2_->Enable(true);
EXPECT_EQ(0u, media_send_channel2_impl()->send_streams().size());
SendCustomRtp1(kSsrc1, 0);
WaitForThreads();
EXPECT_TRUE(CheckCustomRtp2(kSsrc1, 0));
// Let channel 2 update the content by sending `stream2` and enable SRTP.
typename T::Content content3;
CreateContent(0, kPcmuCodec, kH264Codec, &content3);
content3.AddStream(stream2);
EXPECT_TRUE(channel2_->SetLocalContent(&content3, SdpType::kOffer, err));
ASSERT_EQ(1u, media_send_channel2_impl()->send_streams().size());
EXPECT_EQ(stream2, media_send_channel2_impl()->send_streams()[0]);
EXPECT_TRUE(channel1_->SetRemoteContent(&content3, SdpType::kOffer, err));
ASSERT_EQ(1u, media_receive_channel1_impl()->recv_streams().size());
EXPECT_EQ(stream2, media_receive_channel1_impl()->recv_streams()[0]);
// Channel 1 replies but stop sending stream1.
typename T::Content content4;
CreateContent(0, kPcmuCodec, kH264Codec, &content4);
EXPECT_TRUE(channel1_->SetLocalContent(&content4, SdpType::kAnswer, err));
EXPECT_EQ(0u, media_send_channel1_impl()->send_streams().size());
EXPECT_TRUE(channel2_->SetRemoteContent(&content4, SdpType::kAnswer, err));
EXPECT_EQ(0u, media_receive_channel2_impl()->recv_streams().size());
SendCustomRtp2(kSsrc2, 0);
WaitForThreads();
EXPECT_TRUE(CheckCustomRtp1(kSsrc2, 0));
}
// Test that we only start playout and sending at the right times.
void TestPlayoutAndSendingStates() {
CreateChannels(0, 0);
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_FALSE(media_send_channel2_impl()->sending());
channel1_->Enable(true);
FlushCurrentThread();
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&local_media_content1_,
SdpType::kOffer, err));
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
EXPECT_TRUE(channel2_->SetRemoteContent(&local_media_content1_,
SdpType::kOffer, err));
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_FALSE(media_send_channel2_impl()->sending());
EXPECT_TRUE(channel2_->SetLocalContent(&local_media_content2_,
SdpType::kAnswer, err));
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_FALSE(media_send_channel2_impl()->sending());
ConnectFakeTransports();
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_FALSE(media_send_channel2_impl()->sending());
channel2_->Enable(true);
FlushCurrentThread();
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel2_impl()->playout());
}
EXPECT_TRUE(media_send_channel2_impl()->sending());
EXPECT_TRUE(channel1_->SetRemoteContent(&local_media_content2_,
SdpType::kAnswer, err));
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->sending());
}
// Test that changing the MediaContentDirection in the local and remote
// session description start playout and sending at the right time.
void TestMediaContentDirection() {
CreateChannels(0, 0);
typename T::Content content1;
CreateContent(0, kPcmuCodec, kH264Codec, &content1);
typename T::Content content2;
CreateContent(0, kPcmuCodec, kH264Codec, &content2);
// Set `content2` to be InActive.
content2.set_direction(RtpTransceiverDirection::kInactive);
channel1_->Enable(true);
channel2_->Enable(true);
FlushCurrentThread();
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_FALSE(media_send_channel2_impl()->sending());
std::string err;
EXPECT_TRUE(channel1_->SetLocalContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetRemoteContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kPrAnswer, err));
EXPECT_TRUE(
channel1_->SetRemoteContent(&content2, SdpType::kPrAnswer, err));
ConnectFakeTransports();
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending()); // remote InActive
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout()); // local InActive
}
EXPECT_FALSE(media_send_channel2_impl()->sending()); // local InActive
// Update `content2` to be RecvOnly.
content2.set_direction(RtpTransceiverDirection::kRecvOnly);
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kPrAnswer, err));
EXPECT_TRUE(
channel1_->SetRemoteContent(&content2, SdpType::kPrAnswer, err));
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel2_impl()->playout()); // local RecvOnly
}
EXPECT_FALSE(media_send_channel2_impl()->sending()); // local RecvOnly
// Update `content2` to be SendRecv.
content2.set_direction(RtpTransceiverDirection::kSendRecv);
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kAnswer, err));
EXPECT_TRUE(channel1_->SetRemoteContent(&content2, SdpType::kAnswer, err));
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->sending());
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel2_impl()->playout());
}
EXPECT_TRUE(media_send_channel2_impl()->sending());
// Update `content2` to be inactive on the receiver while sending at the
// sender.
content2.set_direction(RtpTransceiverDirection::kInactive);
EXPECT_TRUE(channel1_->SetLocalContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetRemoteContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kAnswer, err));
content2.set_direction(RtpTransceiverDirection::kRecvOnly);
EXPECT_TRUE(channel1_->SetRemoteContent(&content2, SdpType::kAnswer, err));
if (verify_playout_) {
EXPECT_FALSE(media_receive_channel2_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->sending());
// Re-enable `content2`.
content2.set_direction(RtpTransceiverDirection::kSendRecv);
EXPECT_TRUE(channel1_->SetLocalContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetRemoteContent(&content1, SdpType::kOffer, err));
EXPECT_TRUE(channel2_->SetLocalContent(&content2, SdpType::kAnswer, err));
EXPECT_TRUE(channel1_->SetRemoteContent(&content2, SdpType::kAnswer, err));
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel2_impl()->playout());
}
EXPECT_TRUE(media_send_channel1_impl()->sending());
}
// Tests that when the transport channel signals a candidate pair change
// event, the media channel will receive a call on the network route change.
void TestNetworkRouteChanges() {
static constexpr uint16_t kLocalNetId = 1;
static constexpr uint16_t kRemoteNetId = 2;
static constexpr int kLastPacketId = 100;
// Ipv4(20) + UDP(8).
static constexpr int kTransportOverheadPerPacket = 28;
static constexpr int kSrtpOverheadPerPacket = 10;
CreateChannels(DTLS, DTLS);
SendInitiate();
typename T::MediaSendChannel* media_send_channel1_impl =
this->media_send_channel1_impl();
ASSERT_TRUE(media_send_channel1_impl);
// Need to wait for the threads before calling
// `set_num_network_route_changes` because the network route would be set
// when creating the channel.
WaitForThreads();
media_send_channel1_impl->set_num_network_route_changes(0);
SendTask(network_thread_, [this] {
rtc::NetworkRoute network_route;
// The transport channel becomes disconnected.
fake_rtp_dtls_transport1_->ice_transport()->SignalNetworkRouteChanged(
absl::optional<rtc::NetworkRoute>(network_route));
});
WaitForThreads();
EXPECT_EQ(1, media_send_channel1_impl->num_network_route_changes());
EXPECT_FALSE(media_send_channel1_impl->last_network_route().connected);
media_send_channel1_impl->set_num_network_route_changes(0);
SendTask(network_thread_, [this] {
rtc::NetworkRoute network_route;
network_route.connected = true;
network_route.local =
rtc::RouteEndpoint::CreateWithNetworkId(kLocalNetId);
network_route.remote =
rtc::RouteEndpoint::CreateWithNetworkId(kRemoteNetId);
network_route.last_sent_packet_id = kLastPacketId;
network_route.packet_overhead = kTransportOverheadPerPacket;
// The transport channel becomes connected.
fake_rtp_dtls_transport1_->ice_transport()->SignalNetworkRouteChanged(
absl::optional<rtc::NetworkRoute>(network_route));
});
WaitForThreads();
EXPECT_EQ(1, media_send_channel1_impl->num_network_route_changes());
EXPECT_TRUE(media_send_channel1_impl->last_network_route().connected);
EXPECT_EQ(
kLocalNetId,
media_send_channel1_impl->last_network_route().local.network_id());
EXPECT_EQ(
kRemoteNetId,
media_send_channel1_impl->last_network_route().remote.network_id());
EXPECT_EQ(
kLastPacketId,
media_send_channel1_impl->last_network_route().last_sent_packet_id);
EXPECT_EQ(kTransportOverheadPerPacket + kSrtpOverheadPerPacket,
media_send_channel1_impl->transport_overhead_per_packet());
}
// Test setting up a call.
void TestCallSetup() {
CreateChannels(0, 0);
EXPECT_FALSE(IsSrtpActive(channel1_));
EXPECT_TRUE(SendInitiate());
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel1_impl()->playout());
}
EXPECT_FALSE(media_send_channel1_impl()->sending());
EXPECT_TRUE(SendAccept());
EXPECT_FALSE(IsSrtpActive(channel1_));
EXPECT_TRUE(media_send_channel1_impl()->sending());
EXPECT_EQ(1U, media_send_channel1_impl()->send_codecs().size());
if (verify_playout_) {
EXPECT_TRUE(media_receive_channel2_impl()->playout());
}
EXPECT_TRUE(media_send_channel2_impl()->sending());
EXPECT_EQ(1U, media_send_channel2_impl()->send_codecs().size());
}
// Send voice RTP data to the other side and ensure it gets there.
void SendRtpToRtp() {
CreateChannels(RTCP_MUX, RTCP_MUX);
EXPECT_TRUE(SendInitiate());
EXPECT_TRUE(SendAccept());