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* Copyright 2016 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 <string>
#include <unordered_map>
#include "webrtc/api/datachannelinterface.h"
#include "webrtc/p2p/base/transportcontroller.h"
#include "webrtc/pc/quicdatachannel.h"
#include "webrtc/rtc_base/scoped_ref_ptr.h"
#include "webrtc/rtc_base/sigslot.h"
#include "webrtc/rtc_base/thread.h"
namespace cricket {
class QuicTransportChannel;
class ReliableQuicStream;
} // namepsace cricket
namespace webrtc {
// QuicDataTransport creates QuicDataChannels for the PeerConnection. It also
// handles QUIC stream demuxing by distributing incoming QUIC streams from the
// QuicTransportChannel among the QuicDataChannels that it has created.
// QuicDataTransport reads the data channel ID from the incoming QUIC stream,
// then looks it up in a map of ID => QuicDataChannel. If the data channel
// exists, it sends the QUIC stream to the QuicDataChannel.
class QuicDataTransport : public sigslot::has_slots<> {
QuicDataTransport(rtc::Thread* signaling_thread,
rtc::Thread* worker_thread,
rtc::Thread* network_thread,
cricket::TransportController* transport_controller);
~QuicDataTransport() override;
// The QuicDataTransport acts like a BaseChannel with these functions.
bool SetTransport(const std::string& transport_name);
const std::string& transport_name() const { return transport_name_; }
const std::string& content_name() const { return content_name_; }
void set_content_name(const std::string& content_name) {
content_name_ = content_name;
// Creates a QuicDataChannel that uses this QuicDataTransport.
rtc::scoped_refptr<DataChannelInterface> CreateDataChannel(
const std::string& label,
const DataChannelInit* config);
// Removes a QuicDataChannel with the given ID from the QuicDataTransport's
// data channel map.
void DestroyDataChannel(int id);
// True if the QuicDataTransport has a data channel with the given ID.
bool HasDataChannel(int id) const;
// True if the QuicDataTransport has data channels.
bool HasDataChannels() const;
cricket::QuicTransportChannel* quic_transport_channel() {
return quic_transport_channel_;
// Sets the QUIC transport channel for the QuicDataChannels and the
// QuicDataTransport. Returns false if a different QUIC transport channel is
// already set, the QUIC transport channel cannot be set for any of the
// QuicDataChannels, or |channel| is NULL.
bool SetTransportChannel(cricket::QuicTransportChannel* channel);
// Called from the QuicTransportChannel when a ReliableQuicStream is created
// to receive incoming data.
void OnIncomingStream(cricket::ReliableQuicStream* stream);
// Called from the ReliableQuicStream when the first QUIC stream frame is
// received for incoming data. The QuicDataTransport reads the data channel ID
// and message ID from the incoming data, then dispatches the
// ReliableQuicStream to the QuicDataChannel with the same data channel ID.
void OnDataReceived(net::QuicStreamId stream_id,
const char* data,
size_t len);
cricket::QuicTransportChannel* CreateTransportChannel(
const std::string& transport_name);
void DestroyTransportChannel(cricket::TransportChannel* transport_channel);
// Map of data channel ID => QUIC data channel values.
std::unordered_map<int, rtc::scoped_refptr<QuicDataChannel>>
// Map of QUIC stream ID => ReliableQuicStream* values.
std::unordered_map<net::QuicStreamId, cricket::ReliableQuicStream*>
// QuicTransportChannel for sending/receiving data.
cricket::QuicTransportChannel* quic_transport_channel_ = nullptr;
// Threads for the QUIC data channel.
rtc::Thread* const signaling_thread_;
rtc::Thread* const worker_thread_;
rtc::Thread* const network_thread_;
cricket::TransportController* transport_controller_;
std::string content_name_;
std::string transport_name_;
} // namespace webrtc