192 lines
7.4 KiB
C++
192 lines
7.4 KiB
C++
/*
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* Copyright 2019 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 PC_DATA_CHANNEL_CONTROLLER_H_
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#define PC_DATA_CHANNEL_CONTROLLER_H_
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#include <stdint.h>
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#include "api/data_channel_interface.h"
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#include "api/scoped_refptr.h"
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#include "api/sequence_checker.h"
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#include "api/transport/data_channel_transport_interface.h"
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#include "media/base/media_channel.h"
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#include "media/base/media_engine.h"
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#include "media/base/stream_params.h"
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#include "pc/channel.h"
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#include "pc/data_channel_utils.h"
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#include "pc/sctp_data_channel.h"
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#include "rtc_base/checks.h"
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#include "rtc_base/copy_on_write_buffer.h"
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#include "rtc_base/ssl_stream_adapter.h"
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#include "rtc_base/third_party/sigslot/sigslot.h"
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#include "rtc_base/thread.h"
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#include "rtc_base/thread_annotations.h"
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#include "rtc_base/weak_ptr.h"
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namespace webrtc {
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class PeerConnection;
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class DataChannelController : public SctpDataChannelProviderInterface,
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public DataChannelSink {
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public:
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explicit DataChannelController(PeerConnection* pc) : pc_(pc) {}
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// Not copyable or movable.
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DataChannelController(DataChannelController&) = delete;
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DataChannelController& operator=(const DataChannelController& other) = delete;
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DataChannelController(DataChannelController&&) = delete;
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DataChannelController& operator=(DataChannelController&& other) = delete;
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// Implements
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// SctpDataChannelProviderInterface.
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bool SendData(int sid,
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const SendDataParams& params,
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const rtc::CopyOnWriteBuffer& payload,
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cricket::SendDataResult* result) override;
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bool ConnectDataChannel(SctpDataChannel* webrtc_data_channel) override;
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void DisconnectDataChannel(SctpDataChannel* webrtc_data_channel) override;
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void AddSctpDataStream(int sid) override;
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void RemoveSctpDataStream(int sid) override;
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bool ReadyToSendData() const override;
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// Implements DataChannelSink.
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void OnDataReceived(int channel_id,
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DataMessageType type,
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const rtc::CopyOnWriteBuffer& buffer) override;
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void OnChannelClosing(int channel_id) override;
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void OnChannelClosed(int channel_id) override;
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void OnReadyToSend() override;
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void OnTransportClosed(RTCError error) override;
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// Called from PeerConnection::SetupDataChannelTransport_n
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void SetupDataChannelTransport_n();
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// Called from PeerConnection::TeardownDataChannelTransport_n
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void TeardownDataChannelTransport_n();
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// Called from PeerConnection::OnTransportChanged
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// to make required changes to datachannels' transports.
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void OnTransportChanged(
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DataChannelTransportInterface* data_channel_transport);
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// Called from PeerConnection::GetDataChannelStats on the signaling thread.
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std::vector<DataChannelStats> GetDataChannelStats() const;
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// Creates channel and adds it to the collection of DataChannels that will
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// be offered in a SessionDescription, and wraps it in a proxy object.
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rtc::scoped_refptr<DataChannelInterface> InternalCreateDataChannelWithProxy(
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const std::string& label,
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const InternalDataChannelInit*
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config) /* RTC_RUN_ON(signaling_thread()) */;
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void AllocateSctpSids(rtc::SSLRole role);
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SctpDataChannel* FindDataChannelBySid(int sid) const;
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// Checks if any data channel has been added.
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bool HasDataChannels() const;
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bool HasSctpDataChannels() const {
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RTC_DCHECK_RUN_ON(signaling_thread());
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return !sctp_data_channels_.empty();
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}
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// Accessors
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DataChannelTransportInterface* data_channel_transport() const;
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void set_data_channel_transport(DataChannelTransportInterface* transport);
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sigslot::signal1<SctpDataChannel*>& SignalSctpDataChannelCreated() {
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RTC_DCHECK_RUN_ON(signaling_thread());
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return SignalSctpDataChannelCreated_;
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}
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// Called when the transport for the data channels is closed or destroyed.
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void OnTransportChannelClosed(RTCError error);
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void OnSctpDataChannelClosed(SctpDataChannel* channel);
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private:
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rtc::scoped_refptr<SctpDataChannel> InternalCreateSctpDataChannel(
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const std::string& label,
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const InternalDataChannelInit*
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config) /* RTC_RUN_ON(signaling_thread()) */;
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// Parses and handles open messages. Returns true if the message is an open
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// message, false otherwise.
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bool HandleOpenMessage_s(const cricket::ReceiveDataParams& params,
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const rtc::CopyOnWriteBuffer& buffer)
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RTC_RUN_ON(signaling_thread());
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// Called when a valid data channel OPEN message is received.
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void OnDataChannelOpenMessage(const std::string& label,
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const InternalDataChannelInit& config)
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RTC_RUN_ON(signaling_thread());
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// Called from SendData when data_channel_transport() is true.
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bool DataChannelSendData(int sid,
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const SendDataParams& params,
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const rtc::CopyOnWriteBuffer& payload,
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cricket::SendDataResult* result);
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// Called when all data channels need to be notified of a transport channel
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// (calls OnTransportChannelCreated on the signaling thread).
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void NotifyDataChannelsOfTransportCreated();
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rtc::Thread* network_thread() const;
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rtc::Thread* signaling_thread() const;
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// Plugin transport used for data channels. Pointer may be accessed and
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// checked from any thread, but the object may only be touched on the
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// network thread.
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// TODO(bugs.webrtc.org/9987): Accessed on both signaling and network
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// thread.
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DataChannelTransportInterface* data_channel_transport_ = nullptr;
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// Cached value of whether the data channel transport is ready to send.
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bool data_channel_transport_ready_to_send_
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RTC_GUARDED_BY(signaling_thread()) = false;
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SctpSidAllocator sid_allocator_ /* RTC_GUARDED_BY(signaling_thread()) */;
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std::vector<rtc::scoped_refptr<SctpDataChannel>> sctp_data_channels_
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RTC_GUARDED_BY(signaling_thread());
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std::vector<rtc::scoped_refptr<SctpDataChannel>> sctp_data_channels_to_free_
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RTC_GUARDED_BY(signaling_thread());
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// Signals from `data_channel_transport_`. These are invoked on the
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// signaling thread.
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// TODO(bugs.webrtc.org/11547): These '_s' signals likely all belong on the
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// network thread.
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sigslot::signal1<bool> SignalDataChannelTransportWritable_s
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RTC_GUARDED_BY(signaling_thread());
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sigslot::signal2<const cricket::ReceiveDataParams&,
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const rtc::CopyOnWriteBuffer&>
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SignalDataChannelTransportReceivedData_s
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RTC_GUARDED_BY(signaling_thread());
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sigslot::signal1<int> SignalDataChannelTransportChannelClosing_s
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RTC_GUARDED_BY(signaling_thread());
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sigslot::signal1<int> SignalDataChannelTransportChannelClosed_s
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RTC_GUARDED_BY(signaling_thread());
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sigslot::signal1<SctpDataChannel*> SignalSctpDataChannelCreated_
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RTC_GUARDED_BY(signaling_thread());
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// Owning PeerConnection.
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PeerConnection* const pc_;
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// The weak pointers must be dereferenced and invalidated on the signalling
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// thread only.
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rtc::WeakPtrFactory<DataChannelController> weak_factory_{this};
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};
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} // namespace webrtc
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#endif // PC_DATA_CHANNEL_CONTROLLER_H_
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