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webrtc/pc/data_channel_integrationtest.cc
Florent Castelli 15e46aa358 pc: Increase timeout for EndToEndCallWithSctpDataChannelFullBuffer 
The timeout was not long enough in debug mode on slower machines.

Bug: chromium:40072842
Change-Id: Id82399cd7211abf5dd2e03ffa2ee4bd49f8c492f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/344680
Commit-Queue: Florent Castelli <orphis@webrtc.org>
Auto-Submit: Florent Castelli <orphis@webrtc.org>
Reviewed-by: Victor Boivie <boivie@webrtc.org>
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41971}
2024-03-27 11:09:05 +00:00

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/*
* Copyright 2012 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 <stdint.h>
#include <cstdlib>
#include <iterator>
#include <string>
#include <tuple>
#include <vector>
#include "absl/algorithm/container.h"
#include "absl/types/optional.h"
#include "api/data_channel_interface.h"
#include "api/dtls_transport_interface.h"
#include "api/peer_connection_interface.h"
#include "api/scoped_refptr.h"
#include "api/sctp_transport_interface.h"
#include "api/stats/rtc_stats_report.h"
#include "api/stats/rtcstats_objects.h"
#include "api/units/time_delta.h"
#include "p2p/base/transport_description.h"
#include "p2p/base/transport_info.h"
#include "pc/media_session.h"
#include "pc/session_description.h"
#include "pc/test/integration_test_helpers.h"
#include "pc/test/mock_peer_connection_observers.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/fake_clock.h"
#include "rtc_base/gunit.h"
#include "rtc_base/helpers.h"
#include "rtc_base/logging.h"
#include "rtc_base/numerics/safe_conversions.h"
#include "rtc_base/virtual_socket_server.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
// All tests in this file require SCTP support.
#ifdef WEBRTC_HAVE_SCTP
#if defined(WEBRTC_ANDROID)
// Disable heavy tests running on low-end Android devices.
#define DISABLED_ON_ANDROID(t) DISABLED_##t
#else
#define DISABLED_ON_ANDROID(t) t
#endif
class DataChannelIntegrationTest
: public PeerConnectionIntegrationBaseTest,
public ::testing::WithParamInterface<std::tuple<SdpSemantics, bool>> {
protected:
DataChannelIntegrationTest()
: PeerConnectionIntegrationBaseTest(std::get<0>(GetParam())),
allow_media_(std::get<1>(GetParam())) {}
bool allow_media() { return allow_media_; }
bool CreatePeerConnectionWrappers() {
if (allow_media_) {
return PeerConnectionIntegrationBaseTest::CreatePeerConnectionWrappers();
}
return PeerConnectionIntegrationBaseTest::
CreatePeerConnectionWrappersWithoutMediaEngine();
}
private:
// True if media is allowed to be added
const bool allow_media_;
};
// Fake clock must be set before threads are started to prevent race on
// Set/GetClockForTesting().
// To achieve that, multiple inheritance is used as a mixin pattern
// where order of construction is finely controlled.
// This also ensures peerconnection is closed before switching back to non-fake
// clock, avoiding other races and DCHECK failures such as in rtp_sender.cc.
class FakeClockForTest : public rtc::ScopedFakeClock {
protected:
FakeClockForTest() {
// Some things use a time of "0" as a special value, so we need to start out
// the fake clock at a nonzero time.
// TODO(deadbeef): Fix this.
AdvanceTime(TimeDelta::Seconds(1));
}
// Explicit handle.
ScopedFakeClock& FakeClock() { return *this; }
};
class DataChannelIntegrationTestPlanB
: public PeerConnectionIntegrationBaseTest {
protected:
DataChannelIntegrationTestPlanB()
: PeerConnectionIntegrationBaseTest(SdpSemantics::kPlanB_DEPRECATED) {}
};
class DataChannelIntegrationTestUnifiedPlan
: public PeerConnectionIntegrationBaseTest {
protected:
DataChannelIntegrationTestUnifiedPlan()
: PeerConnectionIntegrationBaseTest(SdpSemantics::kUnifiedPlan) {}
};
void MakeActiveSctpOffer(cricket::SessionDescription* desc) {
auto& transport_infos = desc->transport_infos();
for (auto& transport_info : transport_infos) {
transport_info.description.connection_role = cricket::CONNECTIONROLE_ACTIVE;
}
}
// This test causes a PeerConnection to enter Disconnected state, and
// sends data on a DataChannel while disconnected.
// The data should be surfaced when the connection reestablishes.
TEST_P(DataChannelIntegrationTest, DataChannelWhileDisconnected) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer(), kDefaultTimeout);
std::string data1 = "hello first";
caller()->data_channel()->Send(DataBuffer(data1));
EXPECT_EQ_WAIT(data1, callee()->data_observer()->last_message(),
kDefaultTimeout);
// Cause a network outage
virtual_socket_server()->set_drop_probability(1.0);
EXPECT_EQ_WAIT(PeerConnectionInterface::kIceConnectionDisconnected,
caller()->standardized_ice_connection_state(),
kDefaultTimeout);
std::string data2 = "hello second";
caller()->data_channel()->Send(DataBuffer(data2));
// Remove the network outage. The connection should reestablish.
virtual_socket_server()->set_drop_probability(0.0);
EXPECT_EQ_WAIT(data2, callee()->data_observer()->last_message(),
kDefaultTimeout);
}
// This test causes a PeerConnection to enter Disconnected state,
// sends data on a DataChannel while disconnected, and then triggers
// an ICE restart.
// The data should be surfaced when the connection reestablishes.
TEST_P(DataChannelIntegrationTest, DataChannelWhileDisconnectedIceRestart) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer(), kDefaultTimeout);
std::string data1 = "hello first";
caller()->data_channel()->Send(DataBuffer(data1));
EXPECT_EQ_WAIT(data1, callee()->data_observer()->last_message(),
kDefaultTimeout);
// Cause a network outage
virtual_socket_server()->set_drop_probability(1.0);
ASSERT_EQ_WAIT(PeerConnectionInterface::kIceConnectionDisconnected,
caller()->standardized_ice_connection_state(),
kDefaultTimeout);
std::string data2 = "hello second";
caller()->data_channel()->Send(DataBuffer(data2));
// Trigger an ICE restart. The signaling channel is not affected by
// the network outage.
caller()->SetOfferAnswerOptions(IceRestartOfferAnswerOptions());
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Remove the network outage. The connection should reestablish.
virtual_socket_server()->set_drop_probability(0.0);
EXPECT_EQ_WAIT(data2, callee()->data_observer()->last_message(),
kDefaultTimeout);
}
// This test sets up a call between two parties with audio, video and an SCTP
// data channel.
TEST_P(DataChannelIntegrationTest, EndToEndCallWithSctpDataChannel) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Expect that data channel created on caller side will show up for callee as
// well.
caller()->CreateDataChannel();
if (allow_media()) {
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
}
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
if (allow_media()) {
// Ensure the existence of the SCTP data channel didn't impede audio/video.
MediaExpectations media_expectations;
media_expectations.ExpectBidirectionalAudioAndVideo();
ASSERT_TRUE(ExpectNewFrames(media_expectations));
}
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Ensure data can be sent in both directions.
std::string data = "hello world";
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
// This test sets up a call between two parties with an SCTP
// data channel only, and sends messages of various sizes.
TEST_P(DataChannelIntegrationTest,
EndToEndCallWithSctpDataChannelVariousSizes) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Expect that data channel created on caller side will show up for callee as
// well.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
for (int message_size = 1; message_size < 100000; message_size *= 2) {
std::string data(message_size, 'a');
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
// Specifically probe the area around the MTU size.
for (int message_size = 1100; message_size < 1300; message_size += 1) {
std::string data(message_size, 'a');
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
caller()->data_channel()->Close();
EXPECT_EQ_WAIT(caller()->data_observer()->state(),
webrtc::DataChannelInterface::kClosed, kDefaultTimeout);
EXPECT_EQ_WAIT(callee()->data_observer()->state(),
webrtc::DataChannelInterface::kClosed, kDefaultTimeout);
}
// This test sets up a call between two parties with an SCTP
// data channel only, and sends enough messages to fill the queue and then
// closes on the caller. We expect the state to transition to closed on both
// caller and callee.
TEST_P(DataChannelIntegrationTest, EndToEndCallWithSctpDataChannelFullBuffer) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Expect that data channel created on caller side will show up for callee as
// well.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
std::string data(256 * 1024, 'a');
for (size_t queued_size = 0;
queued_size < webrtc::DataChannelInterface::MaxSendQueueSize();
queued_size += data.size()) {
caller()->data_channel()->SendAsync(DataBuffer(data), nullptr);
}
caller()->data_channel()->Close();
DataChannelInterface::DataState expected_states[] = {
DataChannelInterface::DataState::kConnecting,
DataChannelInterface::DataState::kOpen,
DataChannelInterface::DataState::kClosing,
DataChannelInterface::DataState::kClosed};
// Debug data channels are very slow, use a long timeout for those slow,
// heavily parallelized runs.
EXPECT_EQ_WAIT(DataChannelInterface::DataState::kClosed,
caller()->data_observer()->state(), kLongTimeout);
EXPECT_THAT(caller()->data_observer()->states(),
::testing::ElementsAreArray(expected_states));
EXPECT_EQ_WAIT(DataChannelInterface::DataState::kClosed,
callee()->data_observer()->state(), kDefaultTimeout);
EXPECT_THAT(callee()->data_observer()->states(),
::testing::ElementsAreArray(expected_states));
}
// This test sets up a call between two parties with an SCTP
// data channel only, and sends empty messages
TEST_P(DataChannelIntegrationTest,
EndToEndCallWithSctpDataChannelEmptyMessages) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Expect that data channel created on caller side will show up for callee as
// well.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Ensure data can be sent in both directions.
// Sending empty string data
std::string data = "";
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
EXPECT_TRUE(callee()->data_observer()->last_message().empty());
EXPECT_FALSE(callee()->data_observer()->messages().back().binary);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(1u, caller()->data_observer()->received_message_count(),
kDefaultTimeout);
EXPECT_TRUE(caller()->data_observer()->last_message().empty());
EXPECT_FALSE(caller()->data_observer()->messages().back().binary);
// Sending empty binary data
rtc::CopyOnWriteBuffer empty_buffer;
caller()->data_channel()->Send(DataBuffer(empty_buffer, true));
EXPECT_EQ_WAIT(2u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
EXPECT_TRUE(callee()->data_observer()->last_message().empty());
EXPECT_TRUE(callee()->data_observer()->messages().back().binary);
callee()->data_channel()->Send(DataBuffer(empty_buffer, true));
EXPECT_EQ_WAIT(2u, caller()->data_observer()->received_message_count(),
kDefaultTimeout);
EXPECT_TRUE(caller()->data_observer()->last_message().empty());
EXPECT_TRUE(caller()->data_observer()->messages().back().binary);
}
TEST_P(DataChannelIntegrationTest,
EndToEndCallWithSctpDataChannelLowestSafeMtu) {
// The lowest payload size limit that's tested and found safe for this
// application. Note that this is not the safe limit under all conditions;
// in particular, the default is not the largest DTLS signature, and
// this test does not use TURN.
const size_t kLowestSafePayloadSizeLimit = 1225;
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Expect that data channel created on caller side will show up for callee as
// well.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
virtual_socket_server()->set_max_udp_payload(kLowestSafePayloadSizeLimit);
for (int message_size = 1140; message_size < 1240; message_size += 1) {
std::string data(message_size, 'a');
caller()->data_channel()->Send(DataBuffer(data));
ASSERT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
ASSERT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
}
// This test verifies that lowering the MTU of the connection will cause
// the datachannel to not transmit reliably.
// The purpose of this test is to ensure that we know how a too-small MTU
// error manifests itself.
TEST_P(DataChannelIntegrationTest, EndToEndCallWithSctpDataChannelHarmfulMtu) {
// The lowest payload size limit that's tested and found safe for this
// application in this configuration (see test above).
const size_t kLowestSafePayloadSizeLimit = 1225;
// The size of the smallest message that fails to be delivered.
const size_t kMessageSizeThatIsNotDelivered = 1157;
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
virtual_socket_server()->set_max_udp_payload(kLowestSafePayloadSizeLimit - 1);
// Probe for an undelivered or slowly delivered message. The exact
// size limit seems to be dependent on the message history, so make the
// code easily able to find the current value.
bool failure_seen = false;
for (size_t message_size = 1110; message_size < 1400; message_size++) {
const size_t message_count =
callee()->data_observer()->received_message_count();
const std::string data(message_size, 'a');
caller()->data_channel()->Send(DataBuffer(data));
// Wait a very short time for the message to be delivered.
// Note: Waiting only 10 ms is too short for Windows bots; they will
// flakily fail at a random frame.
WAIT(callee()->data_observer()->received_message_count() > message_count,
100);
if (callee()->data_observer()->received_message_count() == message_count) {
ASSERT_EQ(kMessageSizeThatIsNotDelivered, message_size);
failure_seen = true;
break;
}
}
ASSERT_TRUE(failure_seen);
}
// Ensure that when the callee closes an SCTP data channel, the closing
// procedure results in the data channel being closed for the caller as well.
TEST_P(DataChannelIntegrationTest, CalleeClosesSctpDataChannel) {
// Same procedure as above test.
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
if (allow_media()) {
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
}
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Close the data channel on the callee side, and wait for it to reach the
// "closed" state on both sides.
callee()->data_channel()->Close();
DataChannelInterface::DataState expected_states[] = {
DataChannelInterface::DataState::kConnecting,
DataChannelInterface::DataState::kOpen,
DataChannelInterface::DataState::kClosing,
DataChannelInterface::DataState::kClosed};
EXPECT_EQ_WAIT(DataChannelInterface::DataState::kClosed,
caller()->data_observer()->state(), kDefaultTimeout);
EXPECT_THAT(caller()->data_observer()->states(),
::testing::ElementsAreArray(expected_states));
EXPECT_EQ_WAIT(DataChannelInterface::DataState::kClosed,
callee()->data_observer()->state(), kDefaultTimeout);
EXPECT_THAT(callee()->data_observer()->states(),
::testing::ElementsAreArray(expected_states));
}
TEST_P(DataChannelIntegrationTest, SctpDataChannelConfigSentToOtherSide) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
DataChannelInit init;
init.id = 53;
init.maxRetransmits = 52;
caller()->CreateDataChannel("data-channel", &init);
if (allow_media()) {
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
}
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Since "negotiated" is false, the "id" parameter should be ignored.
EXPECT_NE(init.id, callee()->data_channel()->id());
EXPECT_EQ("data-channel", callee()->data_channel()->label());
EXPECT_EQ(init.maxRetransmits, callee()->data_channel()->maxRetransmits());
EXPECT_FALSE(callee()->data_channel()->negotiated());
}
// Test sctp's ability to process unordered data stream, where data actually
// arrives out of order using simulated delays. Previously there have been some
// bugs in this area.
TEST_P(DataChannelIntegrationTest, StressTestUnorderedSctpDataChannel) {
// Introduce random network delays.
// Otherwise it's not a true "unordered" test.
virtual_socket_server()->set_delay_mean(20);
virtual_socket_server()->set_delay_stddev(5);
virtual_socket_server()->UpdateDelayDistribution();
// Normal procedure, but with unordered data channel config.
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
DataChannelInit init;
init.ordered = false;
caller()->CreateDataChannel(&init);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
static constexpr int kNumMessages = 100;
// Deliberately chosen to be larger than the MTU so messages get fragmented.
static constexpr size_t kMaxMessageSize = 4096;
// Create and send random messages.
std::vector<std::string> sent_messages;
for (int i = 0; i < kNumMessages; ++i) {
size_t length =
(rand() % kMaxMessageSize) + 1; // NOLINT (rand_r instead of rand)
std::string message;
ASSERT_TRUE(rtc::CreateRandomString(length, &message));
caller()->data_channel()->Send(DataBuffer(message));
callee()->data_channel()->Send(DataBuffer(message));
sent_messages.push_back(message);
}
// Wait for all messages to be received.
EXPECT_EQ_WAIT(rtc::checked_cast<size_t>(kNumMessages),
caller()->data_observer()->received_message_count(),
kDefaultTimeout);
EXPECT_EQ_WAIT(rtc::checked_cast<size_t>(kNumMessages),
callee()->data_observer()->received_message_count(),
kDefaultTimeout);
// Sort and compare to make sure none of the messages were corrupted.
std::vector<std::string> caller_received_messages;
absl::c_transform(caller()->data_observer()->messages(),
std::back_inserter(caller_received_messages),
[](const auto& a) { return a.data; });
std::vector<std::string> callee_received_messages;
absl::c_transform(callee()->data_observer()->messages(),
std::back_inserter(callee_received_messages),
[](const auto& a) { return a.data; });
absl::c_sort(sent_messages);
absl::c_sort(caller_received_messages);
absl::c_sort(callee_received_messages);
EXPECT_EQ(sent_messages, caller_received_messages);
EXPECT_EQ(sent_messages, callee_received_messages);
}
// Repeatedly open and close data channels on a peer connection to check that
// the channels are properly negotiated and SCTP stream IDs properly recycled.
TEST_P(DataChannelIntegrationTest, StressTestOpenCloseChannelNoDelay) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
int channel_id = 0;
const size_t kChannelCount = 8;
const size_t kIterations = 10;
bool has_negotiated = false;
DataChannelInit init;
for (size_t repeats = 0; repeats < kIterations; ++repeats) {
RTC_LOG(LS_INFO) << "Iteration " << (repeats + 1) << "/" << kIterations;
for (size_t i = 0; i < kChannelCount; ++i) {
rtc::StringBuilder sb;
sb << "channel-" << channel_id++;
caller()->CreateDataChannel(sb.Release(), &init);
}
ASSERT_EQ(caller()->data_channels().size(), kChannelCount);
if (!has_negotiated) {
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
has_negotiated = true;
}
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(caller()->data_channels()[i]->state(),
DataChannelInterface::DataState::kOpen, kDefaultTimeout);
RTC_LOG(LS_INFO) << "Caller Channel "
<< caller()->data_channels()[i]->label() << " with id "
<< caller()->data_channels()[i]->id() << " is open.";
}
ASSERT_EQ_WAIT(callee()->data_channels().size(), kChannelCount,
kDefaultTimeout);
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(callee()->data_channels()[i]->state(),
DataChannelInterface::DataState::kOpen, kDefaultTimeout);
RTC_LOG(LS_INFO) << "Callee Channel "
<< callee()->data_channels()[i]->label() << " with id "
<< callee()->data_channels()[i]->id() << " is open.";
}
// Closing from both sides to attempt creating races.
// A real application would likely only close from one side.
for (size_t i = 0; i < kChannelCount; ++i) {
if (i % 3 == 0) {
callee()->data_channels()[i]->Close();
caller()->data_channels()[i]->Close();
} else {
caller()->data_channels()[i]->Close();
callee()->data_channels()[i]->Close();
}
}
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(caller()->data_channels()[i]->state(),
DataChannelInterface::DataState::kClosed, kDefaultTimeout);
ASSERT_EQ_WAIT(callee()->data_channels()[i]->state(),
DataChannelInterface::DataState::kClosed, kDefaultTimeout);
}
caller()->data_channels().clear();
caller()->data_observers().clear();
callee()->data_channels().clear();
callee()->data_observers().clear();
}
}
// Repeatedly open and close data channels on a peer connection to check that
// the channels are properly negotiated and SCTP stream IDs properly recycled.
// Some delay is added for better coverage.
TEST_P(DataChannelIntegrationTest, StressTestOpenCloseChannelWithDelay) {
// Simulate some network delay
virtual_socket_server()->set_delay_mean(20);
virtual_socket_server()->set_delay_stddev(5);
virtual_socket_server()->UpdateDelayDistribution();
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
int channel_id = 0;
const size_t kChannelCount = 8;
const size_t kIterations = 10;
bool has_negotiated = false;
DataChannelInit init;
for (size_t repeats = 0; repeats < kIterations; ++repeats) {
RTC_LOG(LS_INFO) << "Iteration " << (repeats + 1) << "/" << kIterations;
for (size_t i = 0; i < kChannelCount; ++i) {
rtc::StringBuilder sb;
sb << "channel-" << channel_id++;
caller()->CreateDataChannel(sb.Release(), &init);
}
ASSERT_EQ(caller()->data_channels().size(), kChannelCount);
if (!has_negotiated) {
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
has_negotiated = true;
}
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(caller()->data_channels()[i]->state(),
DataChannelInterface::DataState::kOpen, kDefaultTimeout);
RTC_LOG(LS_INFO) << "Caller Channel "
<< caller()->data_channels()[i]->label() << " with id "
<< caller()->data_channels()[i]->id() << " is open.";
}
ASSERT_EQ_WAIT(callee()->data_channels().size(), kChannelCount,
kDefaultTimeout);
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(callee()->data_channels()[i]->state(),
DataChannelInterface::DataState::kOpen, kDefaultTimeout);
RTC_LOG(LS_INFO) << "Callee Channel "
<< callee()->data_channels()[i]->label() << " with id "
<< callee()->data_channels()[i]->id() << " is open.";
}
// Closing from both sides to attempt creating races.
// A real application would likely only close from one side.
for (size_t i = 0; i < kChannelCount; ++i) {
if (i % 3 == 0) {
callee()->data_channels()[i]->Close();
caller()->data_channels()[i]->Close();
} else {
caller()->data_channels()[i]->Close();
callee()->data_channels()[i]->Close();
}
}
for (size_t i = 0; i < kChannelCount; ++i) {
ASSERT_EQ_WAIT(caller()->data_channels()[i]->state(),
DataChannelInterface::DataState::kClosed, kDefaultTimeout);
ASSERT_EQ_WAIT(callee()->data_channels()[i]->state(),
DataChannelInterface::DataState::kClosed, kDefaultTimeout);
}
caller()->data_channels().clear();
caller()->data_observers().clear();
callee()->data_channels().clear();
callee()->data_observers().clear();
}
}
// This test sets up a call between two parties with audio, and video. When
// audio and video are setup and flowing, an SCTP data channel is negotiated.
TEST_P(DataChannelIntegrationTest, AddSctpDataChannelInSubsequentOffer) {
// This test can't be performed without media.
if (!allow_media()) {
return;
}
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Do initial offer/answer with audio/video.
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Create data channel and do new offer and answer.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Caller data channel should already exist (it created one). Callee data
// channel may not exist yet, since negotiation happens in-band, not in SDP.
ASSERT_NE(nullptr, caller()->data_channel());
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Ensure data can be sent in both directions.
std::string data = "hello world";
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
// Set up a connection initially just using SCTP data channels, later
// upgrading to audio/video, ensuring frames are received end-to-end.
// Effectively the inverse of the test above. This was broken in M57; see
// https://crbug.com/711243
TEST_P(DataChannelIntegrationTest, SctpDataChannelToAudioVideoUpgrade) {
// This test can't be performed without media.
if (!allow_media()) {
return;
}
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
// Do initial offer/answer with just data channel.
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
// Wait until data can be sent over the data channel.
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Do subsequent offer/answer with two-way audio and video. Audio and video
// should end up bundled on the DTLS/ICE transport already used for data.
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
MediaExpectations media_expectations;
media_expectations.ExpectBidirectionalAudioAndVideo();
ASSERT_TRUE(ExpectNewFrames(media_expectations));
}
static void MakeSpecCompliantSctpOffer(cricket::SessionDescription* desc) {
cricket::SctpDataContentDescription* dcd_offer =
GetFirstSctpDataContentDescription(desc);
// See https://crbug.com/webrtc/11211 - this function is a no-op
ASSERT_TRUE(dcd_offer);
dcd_offer->set_use_sctpmap(false);
dcd_offer->set_protocol("UDP/DTLS/SCTP");
}
// Test that the data channel works when a spec-compliant SCTP m= section is
// offered (using "a=sctp-port" instead of "a=sctpmap", and using
// "UDP/DTLS/SCTP" as the protocol).
TEST_P(DataChannelIntegrationTest,
DataChannelWorksWhenSpecCompliantSctpOfferReceived) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->SetGeneratedSdpMunger(MakeSpecCompliantSctpOffer);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel() != nullptr, kDefaultTimeout);
EXPECT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
// Ensure data can be sent in both directions.
std::string data = "hello world";
caller()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, callee()->data_observer()->last_message(),
kDefaultTimeout);
callee()->data_channel()->Send(DataBuffer(data));
EXPECT_EQ_WAIT(data, caller()->data_observer()->last_message(),
kDefaultTimeout);
}
// Test that after closing PeerConnections, they stop sending any packets
// (ICE, DTLS, RTP...).
TEST_P(DataChannelIntegrationTest, ClosingConnectionStopsPacketFlow) {
// This test can't be performed without media.
if (!allow_media()) {
return;
}
// Set up audio/video/data, wait for some frames to be received.
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->AddAudioVideoTracks();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
MediaExpectations media_expectations;
media_expectations.CalleeExpectsSomeAudioAndVideo();
ASSERT_TRUE(ExpectNewFrames(media_expectations));
// Close PeerConnections.
ClosePeerConnections();
// Pump messages for a second, and ensure no new packets end up sent.
uint32_t sent_packets_a = virtual_socket_server()->sent_packets();
WAIT(false, 1000);
uint32_t sent_packets_b = virtual_socket_server()->sent_packets();
EXPECT_EQ(sent_packets_a, sent_packets_b);
}
TEST_P(DataChannelIntegrationTest, DtlsRoleIsSetNormally) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
ASSERT_FALSE(caller()->pc()->GetSctpTransport());
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_TRUE(caller()->pc()->GetSctpTransport());
ASSERT_TRUE(
caller()->pc()->GetSctpTransport()->Information().dtls_transport());
EXPECT_TRUE(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role());
EXPECT_EQ(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kServer);
EXPECT_EQ(callee()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kClient);
// ID should be assigned according to the odd/even rule based on role;
// client gets even numbers, server gets odd ones. RFC 8832 section 6.
// TODO(hta): Test multiple channels.
EXPECT_EQ(caller()->data_channel()->id(), 1);
}
TEST_P(DataChannelIntegrationTest, DtlsRoleIsSetWhenReversed) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
callee()->SetReceivedSdpMunger(MakeActiveSctpOffer);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
EXPECT_TRUE(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role());
EXPECT_EQ(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kClient);
EXPECT_EQ(callee()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kServer);
// ID should be assigned according to the odd/even rule based on role;
// client gets even numbers, server gets odd ones. RFC 8832 section 6.
// TODO(hta): Test multiple channels.
EXPECT_EQ(caller()->data_channel()->id(), 0);
}
TEST_P(DataChannelIntegrationTest,
DtlsRoleIsSetWhenReversedWithChannelCollision) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
callee()->SetReceivedSdpMunger([this](cricket::SessionDescription* desc) {
MakeActiveSctpOffer(desc);
callee()->CreateDataChannel();
});
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_EQ_WAIT(callee()->data_channels().size(), 2U, kDefaultTimeout);
ASSERT_EQ_WAIT(caller()->data_channels().size(), 2U, kDefaultTimeout);
EXPECT_TRUE(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role());
EXPECT_EQ(caller()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kClient);
EXPECT_EQ(callee()
->pc()
->GetSctpTransport()
->Information()
.dtls_transport()
->Information()
.role(),
DtlsTransportTlsRole::kServer);
// ID should be assigned according to the odd/even rule based on role;
// client gets even numbers, server gets odd ones. RFC 8832 section 6.
ASSERT_EQ(caller()->data_channels().size(), 2U);
ASSERT_EQ(callee()->data_channels().size(), 2U);
EXPECT_EQ(caller()->data_channels()[0]->id(), 0);
EXPECT_EQ(caller()->data_channels()[1]->id(), 1);
EXPECT_EQ(callee()->data_channels()[0]->id(), 1);
EXPECT_EQ(callee()->data_channels()[1]->id(), 0);
}
// Test that transport stats are generated by the RTCStatsCollector for a
// connection that only involves data channels. This is a regression test for
// crbug.com/826972.
TEST_P(DataChannelIntegrationTest,
TransportStatsReportedForDataChannelOnlyConnection) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
auto caller_report = caller()->NewGetStats();
EXPECT_EQ(1u, caller_report->GetStatsOfType<RTCTransportStats>().size());
auto callee_report = callee()->NewGetStats();
EXPECT_EQ(1u, callee_report->GetStatsOfType<RTCTransportStats>().size());
}
TEST_P(DataChannelIntegrationTest, QueuedPacketsGetDeliveredInReliableMode) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
caller()->data_channel()->Send(DataBuffer("hello first"));
ASSERT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
// Cause a temporary network outage
virtual_socket_server()->set_drop_probability(1.0);
for (int i = 1; i <= 10; i++) {
caller()->data_channel()->Send(DataBuffer("Sent while blocked"));
}
// Nothing should be delivered during outage. Short wait.
EXPECT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(), 10);
// Reverse outage
virtual_socket_server()->set_drop_probability(0.0);
// All packets should be delivered.
EXPECT_EQ_WAIT(11u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
}
TEST_P(DataChannelIntegrationTest, QueuedPacketsGetDroppedInUnreliableMode) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
DataChannelInit init;
init.maxRetransmits = 0;
init.ordered = false;
caller()->CreateDataChannel(&init);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
caller()->data_channel()->Send(DataBuffer("hello first"));
ASSERT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
// Cause a temporary network outage
virtual_socket_server()->set_drop_probability(1.0);
// Send a few packets. Note that all get dropped only when all packets
// fit into the receiver receive window/congestion window, so that they
// actually get sent.
for (int i = 1; i <= 10; i++) {
caller()->data_channel()->Send(DataBuffer("Sent while blocked"));
}
// Nothing should be delivered during outage.
// We do a short wait to verify that delivery count is still 1.
WAIT(false, 10);
EXPECT_EQ(1u, callee()->data_observer()->received_message_count());
// Reverse the network outage.
virtual_socket_server()->set_drop_probability(0.0);
// Send a new packet, and wait for it to be delivered.
caller()->data_channel()->Send(DataBuffer("After block"));
EXPECT_EQ_WAIT("After block", callee()->data_observer()->last_message(),
kDefaultTimeout);
// Some messages should be lost, but first and last message should have
// been delivered.
// First, check that the protocol guarantee is preserved.
EXPECT_GT(11u, callee()->data_observer()->received_message_count());
EXPECT_LE(2u, callee()->data_observer()->received_message_count());
// Then, check that observed behavior (lose all messages) has not changed
EXPECT_EQ(2u, callee()->data_observer()->received_message_count());
}
TEST_P(DataChannelIntegrationTest,
QueuedPacketsGetDroppedInLifetimeLimitedMode) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
DataChannelInit init;
init.maxRetransmitTime = 1;
init.ordered = false;
caller()->CreateDataChannel(&init);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
caller()->data_channel()->Send(DataBuffer("hello first"));
ASSERT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
// Cause a temporary network outage
virtual_socket_server()->set_drop_probability(1.0);
for (int i = 1; i <= 200; i++) {
caller()->data_channel()->Send(DataBuffer("Sent while blocked"));
}
// Nothing should be delivered during outage.
// We do a short wait to verify that delivery count is still 1,
// and to make sure max packet lifetime (which is in ms) is exceeded.
WAIT(false, 10);
EXPECT_EQ(1u, callee()->data_observer()->received_message_count());
// Reverse the network outage.
virtual_socket_server()->set_drop_probability(0.0);
// Send a new packet, and wait for it to be delivered.
caller()->data_channel()->Send(DataBuffer("After block"));
EXPECT_EQ_WAIT("After block", callee()->data_observer()->last_message(),
kDefaultTimeout);
// Some messages should be lost, but first and last message should have
// been delivered.
// First, check that the protocol guarantee is preserved.
EXPECT_GT(202u, callee()->data_observer()->received_message_count());
EXPECT_LE(2u, callee()->data_observer()->received_message_count());
// Then, check that observed behavior (lose some messages) has not changed
// DcSctp loses all messages. This is correct.
EXPECT_EQ(2u, callee()->data_observer()->received_message_count());
}
TEST_P(DataChannelIntegrationTest,
DISABLED_ON_ANDROID(SomeQueuedPacketsGetDroppedInMaxRetransmitsMode)) {
CreatePeerConnectionWrappers();
ConnectFakeSignaling();
DataChannelInit init;
init.maxRetransmits = 0;
init.ordered = false;
caller()->CreateDataChannel(&init);
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
caller()->data_channel()->Send(DataBuffer("hello first"));
ASSERT_EQ_WAIT(1u, callee()->data_observer()->received_message_count(),
kDefaultTimeout);
// Cause a temporary network outage
virtual_socket_server()->set_drop_probability(1.0);
// Fill the SCTP socket buffer until queued data starts to build.
constexpr size_t kBufferedDataInSctpSocket = 2'000'000;
size_t packet_counter = 0;
while (caller()->data_channel()->buffered_amount() <
kBufferedDataInSctpSocket &&
packet_counter < 10000) {
packet_counter++;
caller()->data_channel()->Send(DataBuffer("Sent while blocked"));
}
if (caller()->data_channel()->buffered_amount() > kBufferedDataInSctpSocket) {
RTC_LOG(LS_INFO) << "Buffered data after " << packet_counter << " packets";
} else {
RTC_LOG(LS_INFO) << "No buffered data after " << packet_counter
<< " packets";
}
// Nothing should be delivered during outage.
// We do a short wait to verify that delivery count is still 1.
WAIT(false, 10);
EXPECT_EQ(1u, callee()->data_observer()->received_message_count());
// Reverse the network outage.
virtual_socket_server()->set_drop_probability(0.0);
// Send a new packet, and wait for it to be delivered.
caller()->data_channel()->Send(DataBuffer("After block"));
EXPECT_EQ_WAIT("After block", callee()->data_observer()->last_message(),
kDefaultTimeout);
// Some messages should be lost, but first and last message should have
// been delivered.
// Due to the fact that retransmissions are only counted when the packet
// goes on the wire, NOT when they are stalled in queue due to
// congestion, we expect some of the packets to be delivered, because
// congestion prevented them from being sent.
// Citation: https://tools.ietf.org/html/rfc7496#section-3.1
// First, check that the protocol guarantee is preserved.
EXPECT_GT(packet_counter,
callee()->data_observer()->received_message_count());
EXPECT_LE(2u, callee()->data_observer()->received_message_count());
// Then, check that observed behavior (lose between 100 and 200 messages)
// has not changed.
// Usrsctp behavior is different on Android (177) and other platforms (122).
// Dcsctp loses 432 packets.
EXPECT_GT(2 + packet_counter - 100,
callee()->data_observer()->received_message_count());
EXPECT_LT(2 + packet_counter - 500,
callee()->data_observer()->received_message_count());
}
INSTANTIATE_TEST_SUITE_P(DataChannelIntegrationTest,
DataChannelIntegrationTest,
Combine(Values(SdpSemantics::kPlanB_DEPRECATED,
SdpSemantics::kUnifiedPlan),
testing::Bool()));
TEST_F(DataChannelIntegrationTestUnifiedPlan,
EndToEndCallWithBundledSctpDataChannel) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->AddAudioVideoTracks();
callee()->AddAudioVideoTracks();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(caller()->pc()->GetSctpTransport(), kDefaultTimeout);
ASSERT_EQ_WAIT(SctpTransportState::kConnected,
caller()->pc()->GetSctpTransport()->Information().state(),
kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
}
TEST_F(DataChannelIntegrationTestUnifiedPlan,
EndToEndCallWithDataChannelOnlyConnects) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_channel(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
ASSERT_TRUE(caller()->data_observer()->IsOpen());
}
TEST_F(DataChannelIntegrationTestUnifiedPlan, DataChannelClosesWhenClosed) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
caller()->data_channel()->Close();
ASSERT_TRUE_WAIT(!callee()->data_observer()->IsOpen(), kDefaultTimeout);
}
TEST_F(DataChannelIntegrationTestUnifiedPlan,
DataChannelClosesWhenClosedReverse) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
callee()->data_channel()->Close();
ASSERT_TRUE_WAIT(!caller()->data_observer()->IsOpen(), kDefaultTimeout);
}
TEST_F(DataChannelIntegrationTestUnifiedPlan,
DataChannelClosesWhenPeerConnectionClosed) {
ASSERT_TRUE(CreatePeerConnectionWrappers());
ConnectFakeSignaling();
caller()->CreateDataChannel();
caller()->CreateAndSetAndSignalOffer();
ASSERT_TRUE_WAIT(SignalingStateStable(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer(), kDefaultTimeout);
ASSERT_TRUE_WAIT(callee()->data_observer()->IsOpen(), kDefaultTimeout);
caller()->pc()->Close();
ASSERT_TRUE_WAIT(!callee()->data_observer()->IsOpen(), kDefaultTimeout);
}
#endif // WEBRTC_HAVE_SCTP
} // namespace
} // namespace webrtc
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