233 lines
9.0 KiB
C
233 lines
9.0 KiB
C
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/*
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* Copyright 2015 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_P2P_BASE_TRANSPORTCONTROLLER_H_
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#define WEBRTC_P2P_BASE_TRANSPORTCONTROLLER_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 "webrtc/base/asyncinvoker.h"
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#include "webrtc/base/sigslot.h"
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#include "webrtc/base/sslstreamadapter.h"
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#include "webrtc/p2p/base/candidate.h"
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#include "webrtc/p2p/base/transport.h"
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namespace rtc {
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class Thread;
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}
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namespace cricket {
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class TransportController : public sigslot::has_slots<>,
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public rtc::MessageHandler {
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public:
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TransportController(rtc::Thread* signaling_thread,
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rtc::Thread* network_thread,
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PortAllocator* port_allocator);
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virtual ~TransportController();
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rtc::Thread* signaling_thread() const { return signaling_thread_; }
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rtc::Thread* network_thread() const { return network_thread_; }
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PortAllocator* port_allocator() const { return port_allocator_; }
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// Can only be set before transports are created.
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// TODO(deadbeef): Make this an argument to the constructor once BaseSession
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// and WebRtcSession are combined
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bool SetSslMaxProtocolVersion(rtc::SSLProtocolVersion version);
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void SetIceConfig(const IceConfig& config);
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void SetIceRole(IceRole ice_role);
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bool GetSslRole(const std::string& transport_name, rtc::SSLRole* role);
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// Specifies the identity to use in this session.
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// Can only be called once.
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bool SetLocalCertificate(
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const rtc::scoped_refptr<rtc::RTCCertificate>& certificate);
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bool GetLocalCertificate(
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const std::string& transport_name,
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rtc::scoped_refptr<rtc::RTCCertificate>* certificate);
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// Caller owns returned certificate
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std::unique_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate(
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const std::string& transport_name);
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bool SetLocalTransportDescription(const std::string& transport_name,
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const TransportDescription& tdesc,
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ContentAction action,
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std::string* err);
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bool SetRemoteTransportDescription(const std::string& transport_name,
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const TransportDescription& tdesc,
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ContentAction action,
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std::string* err);
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// Start gathering candidates for any new transports, or transports doing an
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// ICE restart.
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void MaybeStartGathering();
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bool AddRemoteCandidates(const std::string& transport_name,
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const Candidates& candidates,
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std::string* err);
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bool RemoveRemoteCandidates(const Candidates& candidates, std::string* err);
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bool ReadyForRemoteCandidates(const std::string& transport_name);
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bool GetStats(const std::string& transport_name, TransportStats* stats);
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// Creates a channel if it doesn't exist. Otherwise, increments a reference
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// count and returns an existing channel.
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virtual TransportChannel* CreateTransportChannel_n(
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const std::string& transport_name,
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int component);
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// Decrements a channel's reference count, and destroys the channel if
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// nothing is referencing it.
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virtual void DestroyTransportChannel_n(const std::string& transport_name,
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int component);
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void use_quic() { quic_ = true; }
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bool quic() const { return quic_; }
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// All of these signals are fired on the signalling thread.
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// If any transport failed => failed,
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// Else if all completed => completed,
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// Else if all connected => connected,
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// Else => connecting
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sigslot::signal1<IceConnectionState> SignalConnectionState;
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// Receiving if any transport is receiving
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sigslot::signal1<bool> SignalReceiving;
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// If all transports done gathering => complete,
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// Else if any are gathering => gathering,
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// Else => new
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sigslot::signal1<IceGatheringState> SignalGatheringState;
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// (transport_name, candidates)
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sigslot::signal2<const std::string&, const Candidates&>
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SignalCandidatesGathered;
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sigslot::signal1<const Candidates&> SignalCandidatesRemoved;
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// for unit test
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const rtc::scoped_refptr<rtc::RTCCertificate>& certificate_for_testing();
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protected:
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// Protected and virtual so we can override it in unit tests.
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virtual Transport* CreateTransport_n(const std::string& transport_name);
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// For unit tests
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const std::map<std::string, Transport*>& transports() { return transports_; }
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Transport* GetTransport_n(const std::string& transport_name);
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private:
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void OnMessage(rtc::Message* pmsg) override;
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// It's the Transport that's currently responsible for creating/destroying
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// channels, but the TransportController keeps track of how many external
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// objects (BaseChannels) reference each channel.
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struct RefCountedChannel {
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RefCountedChannel() : impl_(nullptr), ref_(0) {}
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explicit RefCountedChannel(TransportChannelImpl* impl)
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: impl_(impl), ref_(0) {}
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void AddRef() { ++ref_; }
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void DecRef() {
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ASSERT(ref_ > 0);
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--ref_;
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}
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int ref() const { return ref_; }
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TransportChannelImpl* get() const { return impl_; }
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TransportChannelImpl* operator->() const { return impl_; }
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private:
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TransportChannelImpl* impl_;
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int ref_;
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};
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std::vector<RefCountedChannel>::iterator FindChannel_n(
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const std::string& transport_name,
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int component);
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Transport* GetOrCreateTransport_n(const std::string& transport_name);
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void DestroyTransport_n(const std::string& transport_name);
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void DestroyAllTransports_n();
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bool SetSslMaxProtocolVersion_n(rtc::SSLProtocolVersion version);
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void SetIceConfig_n(const IceConfig& config);
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void SetIceRole_n(IceRole ice_role);
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bool GetSslRole_n(const std::string& transport_name, rtc::SSLRole* role);
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bool SetLocalCertificate_n(
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const rtc::scoped_refptr<rtc::RTCCertificate>& certificate);
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bool GetLocalCertificate_n(
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const std::string& transport_name,
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rtc::scoped_refptr<rtc::RTCCertificate>* certificate);
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std::unique_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate_n(
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const std::string& transport_name);
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bool SetLocalTransportDescription_n(const std::string& transport_name,
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const TransportDescription& tdesc,
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ContentAction action,
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std::string* err);
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bool SetRemoteTransportDescription_n(const std::string& transport_name,
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const TransportDescription& tdesc,
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ContentAction action,
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std::string* err);
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void MaybeStartGathering_n();
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bool AddRemoteCandidates_n(const std::string& transport_name,
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const Candidates& candidates,
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std::string* err);
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bool RemoveRemoteCandidates_n(const Candidates& candidates, std::string* err);
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bool ReadyForRemoteCandidates_n(const std::string& transport_name);
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bool GetStats_n(const std::string& transport_name, TransportStats* stats);
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// Handlers for signals from Transport.
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void OnChannelWritableState_n(TransportChannel* channel);
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void OnChannelReceivingState_n(TransportChannel* channel);
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void OnChannelGatheringState_n(TransportChannelImpl* channel);
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void OnChannelCandidateGathered_n(TransportChannelImpl* channel,
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const Candidate& candidate);
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void OnChannelCandidatesRemoved(const Candidates& candidates);
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void OnChannelCandidatesRemoved_n(TransportChannelImpl* channel,
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const Candidates& candidates);
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void OnChannelRoleConflict_n(TransportChannelImpl* channel);
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void OnChannelStateChanged_n(TransportChannelImpl* channel);
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void UpdateAggregateStates_n();
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rtc::Thread* const signaling_thread_ = nullptr;
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rtc::Thread* const network_thread_ = nullptr;
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typedef std::map<std::string, Transport*> TransportMap;
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TransportMap transports_;
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std::vector<RefCountedChannel> channels_;
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PortAllocator* const port_allocator_ = nullptr;
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rtc::SSLProtocolVersion ssl_max_version_ = rtc::SSL_PROTOCOL_DTLS_12;
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// Aggregate state for TransportChannelImpls.
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IceConnectionState connection_state_ = kIceConnectionConnecting;
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bool receiving_ = false;
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IceGatheringState gathering_state_ = kIceGatheringNew;
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// TODO(deadbeef): Move the fields below down to the transports themselves
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IceConfig ice_config_;
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IceRole ice_role_ = ICEROLE_CONTROLLING;
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uint64_t ice_tiebreaker_ = rtc::CreateRandomId64();
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rtc::scoped_refptr<rtc::RTCCertificate> certificate_;
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rtc::AsyncInvoker invoker_;
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// True if QUIC is used instead of DTLS.
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bool quic_ = false;
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};
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} // namespace cricket
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#endif // WEBRTC_P2P_BASE_TRANSPORTCONTROLLER_H_
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