91 lines
3.5 KiB
C
91 lines
3.5 KiB
C
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/*
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* Copyright 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_API_QUICDATATRANSPORT_H_
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#define WEBRTC_API_QUICDATATRANSPORT_H_
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#include <string>
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#include <unordered_map>
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#include "webrtc/api/datachannelinterface.h"
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#include "webrtc/api/quicdatachannel.h"
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#include "webrtc/base/scoped_ref_ptr.h"
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#include "webrtc/base/sigslot.h"
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#include "webrtc/base/thread.h"
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namespace cricket {
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class QuicTransportChannel;
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class ReliableQuicStream;
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} // namepsace cricket
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namespace webrtc {
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// QuicDataTransport creates QuicDataChannels for the PeerConnection. It also
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// handles QUIC stream demuxing by distributing incoming QUIC streams from the
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// QuicTransportChannel among the QuicDataChannels that it has created.
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//
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// QuicDataTransport reads the data channel ID from the incoming QUIC stream,
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// then looks it up in a map of ID => QuicDataChannel. If the data channel
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// exists, it sends the QUIC stream to the QuicDataChannel.
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class QuicDataTransport : public sigslot::has_slots<> {
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public:
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QuicDataTransport(rtc::Thread* signaling_thread, rtc::Thread* worker_thread);
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~QuicDataTransport() override;
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// Sets the QUIC transport channel for the QuicDataChannels and the
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// QuicDataTransport. Returns false if a different QUIC transport channel is
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// already set, the QUIC transport channel cannot be set for any of the
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// QuicDataChannels, or |channel| is NULL.
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bool SetTransportChannel(cricket::QuicTransportChannel* channel);
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// Creates a QuicDataChannel that uses this QuicDataTransport.
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rtc::scoped_refptr<DataChannelInterface> CreateDataChannel(
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const std::string& label,
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const DataChannelInit* config);
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// Removes a QuicDataChannel with the given ID from the QuicDataTransport's
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// data channel map.
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void DestroyDataChannel(int id);
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// True if the QuicDataTransport has a data channel with the given ID.
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bool HasDataChannel(int id) const;
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// True if the QuicDataTransport has data channels.
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bool HasDataChannels() const;
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private:
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// Called from the QuicTransportChannel when a ReliableQuicStream is created
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// to receive incoming data.
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void OnIncomingStream(cricket::ReliableQuicStream* stream);
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// Called from the ReliableQuicStream when the first QUIC stream frame is
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// received for incoming data. The QuicDataTransport reads the data channel ID
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// and message ID from the incoming data, then dispatches the
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// ReliableQuicStream to the QuicDataChannel with the same data channel ID.
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void OnDataReceived(net::QuicStreamId stream_id,
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const char* data,
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size_t len);
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// Map of data channel ID => QUIC data channel values.
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std::unordered_map<int, rtc::scoped_refptr<QuicDataChannel>>
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data_channel_by_id_;
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// Map of QUIC stream ID => ReliableQuicStream* values.
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std::unordered_map<net::QuicStreamId, cricket::ReliableQuicStream*>
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quic_stream_by_id_;
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// QuicTransportChannel for sending/receiving data.
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cricket::QuicTransportChannel* quic_transport_channel_ = nullptr;
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// Signaling and worker threads for the QUIC data channel.
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rtc::Thread* const signaling_thread_;
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rtc::Thread* const worker_thread_;
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};
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} // namespace webrtc
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#endif // WEBRTC_API_QUICDATATRANSPORT_H_
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