Modify PeerConnection for end-to-end QuicDataChannel usage

To allow end-to-end QuicDataChannel usage with a
PeerConnection, RTCConfiguration has been modified to
include a boolean for whether to do QUIC, since negotiation of
QUIC is not implemented. If one peer does QUIC, then it will be
assumed that the other peer must do QUIC or the connection
will fail.

PeerConnection has been modified to create data channels of type
QuicDataChannel when the peer wants to do QUIC.

WebRtcSession has been modified to use a QuicTransportChannel
instead of a DtlsTransportChannelWrapper/DataChannel
when QUIC should be used.

Modification of previous in-flight CL: https://codereview.chromium.org/1844803002/

Review-Url: https://codereview.webrtc.org/2089553002
Cr-Commit-Position: refs/heads/master@{#13470}

webrtc/api/quicdatachannel.cc

@@ -61,10 +61,12 @@ bool ParseQuicDataMessageHeader(const char* data,
 
 QuicDataChannel::QuicDataChannel(rtc::Thread* signaling_thread,
                                  rtc::Thread* worker_thread,
+                                 rtc::Thread* network_thread,
                                  const std::string& label,
                                  const DataChannelInit& config)
     : signaling_thread_(signaling_thread),
       worker_thread_(worker_thread),
+      network_thread_(network_thread),
       id_(config.id),
       state_(kConnecting),
       buffered_amount_(0),
@@ -91,12 +93,12 @@ bool QuicDataChannel::Send(const DataBuffer& buffer) {
                   << " is not open so cannot send.";
     return false;
   }
-  return worker_thread_->Invoke<bool>(
+  return network_thread_->Invoke<bool>(
-      RTC_FROM_HERE, rtc::Bind(&QuicDataChannel::Send_w, this, buffer));
+      RTC_FROM_HERE, rtc::Bind(&QuicDataChannel::Send_n, this, buffer));
 }
 
-bool QuicDataChannel::Send_w(const DataBuffer& buffer) {
+bool QuicDataChannel::Send_n(const DataBuffer& buffer) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
+  RTC_DCHECK(network_thread_->IsCurrent());
 
   // Encode and send the header containing the data channel ID and message ID.
   rtc::CopyOnWriteBuffer header;
@@ -256,7 +258,7 @@ DataChannelInterface::DataState QuicDataChannel::SetTransportChannel_w() {
 }
 
 void QuicDataChannel::OnIncomingMessage(Message&& message) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
+  RTC_DCHECK(network_thread_->IsCurrent());
   RTC_DCHECK(message.stream);
   if (!observer_) {
     LOG(LS_WARNING) << "QUIC data channel " << id_
@@ -295,7 +297,7 @@ void QuicDataChannel::OnIncomingMessage(Message&& message) {
 void QuicDataChannel::OnDataReceived(net::QuicStreamId stream_id,
                                      const char* data,
                                      size_t len) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
+  RTC_DCHECK(network_thread_->IsCurrent());
   RTC_DCHECK(data);
   const auto& kv = incoming_quic_messages_.find(stream_id);
   if (kv == incoming_quic_messages_.end()) {
@@ -325,7 +327,7 @@ void QuicDataChannel::OnDataReceived(net::QuicStreamId stream_id,
 }
 
 void QuicDataChannel::OnReadyToSend(cricket::TransportChannel* channel) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
+  RTC_DCHECK(network_thread_->IsCurrent());
   RTC_DCHECK(channel == quic_transport_channel_);
   LOG(LS_INFO) << "QuicTransportChannel is ready to send";
   invoker_.AsyncInvoke<void>(
@@ -342,7 +344,7 @@ void QuicDataChannel::OnWriteBlockedStreamClosed(net::QuicStreamId stream_id,
 
 void QuicDataChannel::OnIncomingQueuedStreamClosed(net::QuicStreamId stream_id,
                                                    int error) {
-  RTC_DCHECK(worker_thread_->IsCurrent());
+  RTC_DCHECK(network_thread_->IsCurrent());
   LOG(LS_VERBOSE) << "Incoming queued stream " << stream_id << " is closed.";
   incoming_quic_messages_.erase(stream_id);
 }

webrtc/api/quicdatachannel.h

@@ -88,6 +88,7 @@ class QuicDataChannel : public rtc::RefCountedObject<DataChannelInterface>,
 
   QuicDataChannel(rtc::Thread* signaling_thread,
                   rtc::Thread* worker_thread,
+                  rtc::Thread* network_thread,
                   const std::string& label,
                   const DataChannelInit& config);
   ~QuicDataChannel() override;
@@ -155,11 +156,13 @@ class QuicDataChannel : public rtc::RefCountedObject<DataChannelInterface>,
   void OnReadyToSend(cricket::TransportChannel* channel);
   void OnConnectionClosed();
 
-  // Worker thread methods.
+  // Network thread methods.
   // Sends the data buffer to the remote peer using an outgoing QUIC stream.
   // Returns true if the data buffer can be successfully sent, or if it is
   // queued to be sent later.
-  bool Send_w(const DataBuffer& buffer);
+  bool Send_n(const DataBuffer& buffer);
+
+  // Worker thread methods.
   // Connects the |quic_transport_channel_| signals to this QuicDataChannel,
   // then returns the new QuicDataChannel state.
   DataState SetTransportChannel_w();
@@ -185,8 +188,10 @@ class QuicDataChannel : public rtc::RefCountedObject<DataChannelInterface>,
   cricket::QuicTransportChannel* quic_transport_channel_ = nullptr;
   // Signaling thread for DataChannelInterface methods.
   rtc::Thread* const signaling_thread_;
-  // Worker thread for sending data and |quic_transport_channel_| callbacks.
+  // Worker thread for |quic_transport_channel_| callbacks.
   rtc::Thread* const worker_thread_;
+  // Network thread for sending data and |quic_transport_channel_| callbacks.
+  rtc::Thread* const network_thread_;
   rtc::AsyncInvoker invoker_;
   // Map of QUIC stream ID => ReliableQuicStream* for write blocked QUIC
   // streams.

webrtc/api/quicdatachannel_unittest.cc

@@ -120,8 +120,9 @@ class FakeQuicDataTransport : public sigslot::has_slots<> {
     DataChannelInit config;
     config.id = id;
     config.protocol = protocol;
-    rtc::scoped_refptr<QuicDataChannel> data_channel(new QuicDataChannel(
+    rtc::scoped_refptr<QuicDataChannel> data_channel(
-        rtc::Thread::Current(), rtc::Thread::Current(), label, config));
+        new QuicDataChannel(rtc::Thread::Current(), rtc::Thread::Current(),
+                            rtc::Thread::Current(), label, config));
     data_channel_by_id_[id] = data_channel;
     return data_channel;
   }
@@ -201,8 +202,6 @@ class QuicDataChannelPeer {
 
   // Connects |ice_transport_channel_| to that of the other peer.
   void Connect(QuicDataChannelPeer* other_peer) {
-    ice_transport_channel_->Connect();
-    other_peer->ice_transport_channel_->Connect();
     ice_transport_channel_->SetDestination(other_peer->ice_transport_channel_);
   }
 

webrtc/api/quicdatatransport.cc

@@ -17,10 +17,14 @@
 namespace webrtc {
 
 QuicDataTransport::QuicDataTransport(rtc::Thread* signaling_thread,
-                                     rtc::Thread* worker_thread)
+                                     rtc::Thread* worker_thread,
-    : signaling_thread_(signaling_thread), worker_thread_(worker_thread) {
+                                     rtc::Thread* network_thread)
+    : signaling_thread_(signaling_thread),
+      worker_thread_(worker_thread),
+      network_thread_(network_thread) {
   RTC_DCHECK(signaling_thread_);
   RTC_DCHECK(worker_thread_);
+  RTC_DCHECK(network_thread_);
 }
 
 QuicDataTransport::~QuicDataTransport() {}
@@ -68,8 +72,8 @@ rtc::scoped_refptr<DataChannelInterface> QuicDataTransport::CreateDataChannel(
     LOG(LS_ERROR) << "QUIC data channel already exists with id " << config->id;
     return nullptr;
   }
-  rtc::scoped_refptr<QuicDataChannel> data_channel(
+  rtc::scoped_refptr<QuicDataChannel> data_channel(new QuicDataChannel(
-      new QuicDataChannel(signaling_thread_, worker_thread_, label, *config));
+      signaling_thread_, worker_thread_, network_thread_, label, *config));
   if (quic_transport_channel_) {
     if (!data_channel->SetTransportChannel(quic_transport_channel_)) {
       LOG(LS_ERROR)

webrtc/api/quicdatatransport.h

@@ -36,7 +36,9 @@ namespace webrtc {
 // exists, it sends the QUIC stream to the QuicDataChannel.
 class QuicDataTransport : public sigslot::has_slots<> {
  public:
-  QuicDataTransport(rtc::Thread* signaling_thread, rtc::Thread* worker_thread);
+  QuicDataTransport(rtc::Thread* signaling_thread,
+                    rtc::Thread* worker_thread,
+                    rtc::Thread* network_thread);
   ~QuicDataTransport() override;
 
   // Sets the QUIC transport channel for the QuicDataChannels and the
@@ -80,9 +82,10 @@ class QuicDataTransport : public sigslot::has_slots<> {
       quic_stream_by_id_;
   // QuicTransportChannel for sending/receiving data.
   cricket::QuicTransportChannel* quic_transport_channel_ = nullptr;
-  // Signaling and worker threads for the QUIC data channel.
+  // Threads for the QUIC data channel.
   rtc::Thread* const signaling_thread_;
   rtc::Thread* const worker_thread_;
+  rtc::Thread* const network_thread_;
 };
 
 }  // namespace webrtc

webrtc/api/quicdatatransport_unittest.cc

@@ -64,7 +64,9 @@ class FakeObserver : public DataChannelObserver {
 class QuicDataTransportPeer {
  public:
   QuicDataTransportPeer()
-      : quic_data_transport_(rtc::Thread::Current(), rtc::Thread::Current()),
+      : quic_data_transport_(rtc::Thread::Current(),
+                             rtc::Thread::Current(),
+                             rtc::Thread::Current()),
         ice_transport_channel_(new FakeTransportChannel("data", 0)),
         quic_transport_channel_(ice_transport_channel_) {
     ice_transport_channel_->SetAsync(true);
@@ -80,8 +82,6 @@ class QuicDataTransportPeer {
 
   // Connects |ice_transport_channel_| to that of the other peer.
   void Connect(QuicDataTransportPeer* other_peer) {
-    ice_transport_channel_->Connect();
-    other_peer->ice_transport_channel_->Connect();
     ice_transport_channel_->SetDestination(other_peer->ice_transport_channel_);
   }
 

webrtc/p2p/quic/quicsession_unittest.cc

@@ -295,8 +295,6 @@ void QuicSessionTest::CreateClientAndServerSessions() {
   channel2->SetAsync(true);
 
   // Configure peers to send packets to each other.
-  channel1->Connect();
-  channel2->Connect();
   channel1->SetDestination(channel2.get());
 
   client_peer_ = CreateSession(std::move(channel1), Perspective::IS_CLIENT);

webrtc/p2p/quic/quictransportchannel.cc

@@ -395,7 +395,8 @@ void QuicTransportChannel::OnRouteChange(TransportChannel* channel,
 void QuicTransportChannel::OnSelectedCandidatePairChanged(
     TransportChannel* channel,
     CandidatePairInterface* selected_candidate_pair,
-    int last_sent_packet_id bool ready_to_send) {
+    int last_sent_packet_id,
+    bool ready_to_send) {
   ASSERT(channel == channel_.get());
   SignalSelectedCandidatePairChanged(this, selected_candidate_pair,
                                      last_sent_packet_id, ready_to_send);

webrtc/p2p/quic/quictransportchannel.h

@@ -166,9 +166,6 @@ class QuicTransportChannel : public TransportChannelImpl,
   void SetIceConfig(const IceConfig& config) override {
     channel_->SetIceConfig(config);
   }
-  void Connect() override {
-    channel_->Connect();
-  }
 
   // QuicPacketWriter overrides.
   // Called from net::QuicConnection when |quic_| has packets to write.

webrtc/p2p/quic/quictransportchannel_unittest.cc

@@ -112,8 +112,6 @@ class QuicTestPeer : public sigslot::has_slots<> {
 
   // Connects |ice_channel_| to that of the other peer.
   void Connect(QuicTestPeer* other_peer) {
-    ice_channel_->Connect();
-    other_peer->ice_channel_->Connect();
     ice_channel_->SetDestination(other_peer->ice_channel_);
   }
 
@@ -419,8 +417,6 @@ TEST_F(QuicTransportChannelTest, TransferInvalidSrtp) {
 // Test that QuicTransportChannel::WritePacket blocks when the ICE
 // channel is not writable, and otherwise succeeds.
 TEST_F(QuicTransportChannelTest, QuicWritePacket) {
-  peer1_.ice_channel()->Connect();
-  peer2_.ice_channel()->Connect();
   peer1_.ice_channel()->SetDestination(peer2_.ice_channel());
   std::string packet = "FAKEQUICPACKET";
 

webrtc/p2p/quic/reliablequicstream_unittest.cc

@@ -49,6 +49,7 @@ using rtc::SR_BLOCK;
 
 // Arbitrary number for a stream's write blocked priority.
 static const SpdyPriority kDefaultPriority = 3;
+static const net::QuicStreamId kStreamId = 5;
 
 // QuicSession that does not create streams and writes data from
 // ReliableQuicStream to a string.
@@ -78,7 +79,7 @@ class MockQuicSession : public QuicSession {
 
   net::ReliableQuicStream* CreateIncomingDynamicStream(
       QuicStreamId id) override {
-    return nullptr;
+    return new ReliableQuicStream(kStreamId, this);
   }
 
   net::ReliableQuicStream* CreateOutgoingDynamicStream(
@@ -142,7 +143,6 @@ class ReliableQuicStreamTest : public ::testing::Test,
   ReliableQuicStreamTest() {}
 
   void CreateReliableQuicStream() {
-    const net::QuicStreamId kStreamId = 5;
 
     // Arbitrary values for QuicConnection.
     QuicConnectionHelper* quic_helper =
@@ -232,7 +232,7 @@ TEST_F(ReliableQuicStreamTest, BufferData) {
 // Read an entire string.
 TEST_F(ReliableQuicStreamTest, ReadDataWhole) {
   CreateReliableQuicStream();
-  net::QuicStreamFrame frame(-1, false, 0, "Hello, World!");
+  net::QuicStreamFrame frame(kStreamId, false, 0, "Hello, World!");
   stream_->OnStreamFrame(frame);
 
   EXPECT_EQ("Hello, World!", read_buffer_);
@@ -241,7 +241,7 @@ TEST_F(ReliableQuicStreamTest, ReadDataWhole) {
 // Read part of a string.
 TEST_F(ReliableQuicStreamTest, ReadDataPartial) {
   CreateReliableQuicStream();
-  net::QuicStreamFrame frame(-1, false, 0, "Hello, World!");
+  net::QuicStreamFrame frame(kStreamId, false, 0, "Hello, World!");
   frame.frame_length = 5;
   stream_->OnStreamFrame(frame);