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/*
* Copyright 2012 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.
*/
#ifndef PC_PEER_CONNECTION_H_
#define PC_PEER_CONNECTION_H_
#include <stdint.h>
#include <functional>
#include <map>
#include <memory>
#include <set>
#include <string>
#include <vector>
#include "absl/types/optional.h"
#include "api/adaptation/resource.h"
#include "api/async_dns_resolver.h"
#include "api/candidate.h"
#include "api/crypto/crypto_options.h"
#include "api/data_channel_interface.h"
#include "api/dtls_transport_interface.h"
#include "api/environment/environment.h"
#include "api/field_trials_view.h"
#include "api/ice_transport_interface.h"
#include "api/jsep.h"
#include "api/media_stream_interface.h"
#include "api/media_types.h"
#include "api/peer_connection_interface.h"
#include "api/rtc_error.h"
#include "api/rtc_event_log/rtc_event_log.h"
#include "api/rtc_event_log_output.h"
#include "api/rtp_receiver_interface.h"
#include "api/rtp_sender_interface.h"
#include "api/rtp_transceiver_interface.h"
#include "api/scoped_refptr.h"
#include "api/sctp_transport_interface.h"
#include "api/sequence_checker.h"
#include "api/set_local_description_observer_interface.h"
#include "api/set_remote_description_observer_interface.h"
#include "api/stats/rtc_stats_collector_callback.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "api/transport/bitrate_settings.h"
#include "api/transport/data_channel_transport_interface.h"
#include "api/transport/enums.h"
#include "api/turn_customizer.h"
#include "call/call.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "p2p/base/ice_transport_internal.h"
#include "p2p/base/port.h"
#include "p2p/base/port_allocator.h"
#include "p2p/base/transport_description.h"
#include "pc/channel_interface.h"
#include "pc/connection_context.h"
#include "pc/data_channel_controller.h"
#include "pc/data_channel_utils.h"
#include "pc/dtls_transport.h"
#include "pc/jsep_transport_controller.h"
#include "pc/legacy_stats_collector.h"
#include "pc/peer_connection_internal.h"
#include "pc/peer_connection_message_handler.h"
#include "pc/rtc_stats_collector.h"
#include "pc/rtp_transceiver.h"
#include "pc/rtp_transmission_manager.h"
#include "pc/rtp_transport_internal.h"
#include "pc/sctp_data_channel.h"
#include "pc/sdp_offer_answer.h"
#include "pc/session_description.h"
#include "pc/transceiver_list.h"
#include "pc/transport_stats.h"
#include "pc/usage_pattern.h"
#include "rtc_base/checks.h"
#include "rtc_base/copy_on_write_buffer.h"
#include "rtc_base/rtc_certificate.h"
#include "rtc_base/ssl_certificate.h"
#include "rtc_base/ssl_stream_adapter.h"
#include "rtc_base/thread.h"
#include "rtc_base/thread_annotations.h"
#include "rtc_base/weak_ptr.h"
namespace webrtc {
// PeerConnection is the implementation of the PeerConnection object as defined
// by the PeerConnectionInterface API surface.
// The class currently is solely responsible for the following:
// - Managing the session state machine (signaling state).
// - Creating and initializing lower-level objects, like PortAllocator and
// BaseChannels.
// - Owning and managing the life cycle of the RtpSender/RtpReceiver and track
// objects.
// - Tracking the current and pending local/remote session descriptions.
// The class currently is jointly responsible for the following:
// - Parsing and interpreting SDP.
// - Generating offers and answers based on the current state.
// - The ICE state machine.
// - Generating stats.
class PeerConnection : public PeerConnectionInternal,
public JsepTransportController::Observer {
public:
// Creates a PeerConnection and initializes it with the given values.
// If the initialization fails, the function releases the PeerConnection
// and returns nullptr.
//
// Note that the function takes ownership of dependencies, and will
// either use them or release them, whether it succeeds or fails.
static RTCErrorOr<rtc::scoped_refptr<PeerConnection>> Create(
const Environment& env,
rtc::scoped_refptr<ConnectionContext> context,
const PeerConnectionFactoryInterface::Options& options,
std::unique_ptr<Call> call,
const PeerConnectionInterface::RTCConfiguration& configuration,
PeerConnectionDependencies dependencies);
rtc::scoped_refptr<StreamCollectionInterface> local_streams() override;
rtc::scoped_refptr<StreamCollectionInterface> remote_streams() override;
bool AddStream(MediaStreamInterface* local_stream) override;
void RemoveStream(MediaStreamInterface* local_stream) override;
RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> AddTrack(
rtc::scoped_refptr<MediaStreamTrackInterface> track,
const std::vector<std::string>& stream_ids) override;
RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> AddTrack(
rtc::scoped_refptr<MediaStreamTrackInterface> track,
const std::vector<std::string>& stream_ids,
const std::vector<RtpEncodingParameters>& init_send_encodings) override;
RTCErrorOr<rtc::scoped_refptr<RtpSenderInterface>> AddTrack(
rtc::scoped_refptr<MediaStreamTrackInterface> track,
const std::vector<std::string>& stream_ids,
const std::vector<RtpEncodingParameters>* init_send_encodings);
RTCError RemoveTrackOrError(
rtc::scoped_refptr<RtpSenderInterface> sender) override;
RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>> AddTransceiver(
rtc::scoped_refptr<MediaStreamTrackInterface> track) override;
RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>> AddTransceiver(
rtc::scoped_refptr<MediaStreamTrackInterface> track,
const RtpTransceiverInit& init) override;
RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>> AddTransceiver(
cricket::MediaType media_type) override;
RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>> AddTransceiver(
cricket::MediaType media_type,
const RtpTransceiverInit& init) override;
rtc::scoped_refptr<RtpSenderInterface> CreateSender(
const std::string& kind,
const std::string& stream_id) override;
std::vector<rtc::scoped_refptr<RtpSenderInterface>> GetSenders()
const override;
std::vector<rtc::scoped_refptr<RtpReceiverInterface>> GetReceivers()
const override;
std::vector<rtc::scoped_refptr<RtpTransceiverInterface>> GetTransceivers()
const override;
RTCErrorOr<rtc::scoped_refptr<DataChannelInterface>> CreateDataChannelOrError(
const std::string& label,
const DataChannelInit* config) override;
// WARNING: LEGACY. See peerconnectioninterface.h
bool GetStats(StatsObserver* observer,
MediaStreamTrackInterface* track,
StatsOutputLevel level) override;
// Spec-complaint GetStats(). See peerconnectioninterface.h
void GetStats(RTCStatsCollectorCallback* callback) override;
void GetStats(
rtc::scoped_refptr<RtpSenderInterface> selector,
rtc::scoped_refptr<RTCStatsCollectorCallback> callback) override;
void GetStats(
rtc::scoped_refptr<RtpReceiverInterface> selector,
rtc::scoped_refptr<RTCStatsCollectorCallback> callback) override;
void ClearStatsCache() override;
SignalingState signaling_state() override;
IceConnectionState ice_connection_state() override;
IceConnectionState ice_connection_state_internal() override {
return ice_connection_state();
}
IceConnectionState standardized_ice_connection_state() override;
PeerConnectionState peer_connection_state() override;
IceGatheringState ice_gathering_state() override;
absl::optional<bool> can_trickle_ice_candidates() override;
const SessionDescriptionInterface* local_description() const override;
const SessionDescriptionInterface* remote_description() const override;
const SessionDescriptionInterface* current_local_description() const override;
const SessionDescriptionInterface* current_remote_description()
const override;
const SessionDescriptionInterface* pending_local_description() const override;
const SessionDescriptionInterface* pending_remote_description()
const override;
void RestartIce() override;
// JSEP01
void CreateOffer(CreateSessionDescriptionObserver* observer,
const RTCOfferAnswerOptions& options) override;
void CreateAnswer(CreateSessionDescriptionObserver* observer,
const RTCOfferAnswerOptions& options) override;
void SetLocalDescription(
std::unique_ptr<SessionDescriptionInterface> desc,
rtc::scoped_refptr<SetLocalDescriptionObserverInterface> observer)
override;
void SetLocalDescription(
rtc::scoped_refptr<SetLocalDescriptionObserverInterface> observer)
override;
// ones taking SetLocalDescriptionObserverInterface as argument.
void SetLocalDescription(SetSessionDescriptionObserver* observer,
SessionDescriptionInterface* desc) override;
void SetLocalDescription(SetSessionDescriptionObserver* observer) override;
void SetRemoteDescription(
std::unique_ptr<SessionDescriptionInterface> desc,
rtc::scoped_refptr<SetRemoteDescriptionObserverInterface> observer)
override;
// ones taking SetRemoteDescriptionObserverInterface as argument.
void SetRemoteDescription(SetSessionDescriptionObserver* observer,
SessionDescriptionInterface* desc) override;
PeerConnectionInterface::RTCConfiguration GetConfiguration() override;
RTCError SetConfiguration(
const PeerConnectionInterface::RTCConfiguration& configuration) override;
bool AddIceCandidate(const IceCandidateInterface* candidate) override;
void AddIceCandidate(std::unique_ptr<IceCandidateInterface> candidate,
std::function<void(RTCError)> callback) override;
bool RemoveIceCandidates(
const std::vector<cricket::Candidate>& candidates) override;
RTCError SetBitrate(const BitrateSettings& bitrate) override;
void ReconfigureBandwidthEstimation(
const BandwidthEstimationSettings& settings) override;
void SetAudioPlayout(bool playout) override;
void SetAudioRecording(bool recording) override;
rtc::scoped_refptr<DtlsTransportInterface> LookupDtlsTransportByMid(
const std::string& mid) override;
rtc::scoped_refptr<DtlsTransport> LookupDtlsTransportByMidInternal(
const std::string& mid);
rtc::scoped_refptr<SctpTransportInterface> GetSctpTransport() const override;
void AddAdaptationResource(rtc::scoped_refptr<Resource> resource) override;
bool StartRtcEventLog(std::unique_ptr<RtcEventLogOutput> output,
int64_t output_period_ms) override;
bool StartRtcEventLog(std::unique_ptr<RtcEventLogOutput> output) override;
void StopRtcEventLog() override;
void Close() override;
rtc::Thread* signaling_thread() const final {
return context_->signaling_thread();
}
rtc::Thread* network_thread() const final {
return context_->network_thread();
}
rtc::Thread* worker_thread() const final { return context_->worker_thread(); }
std::string session_id() const override { return session_id_; }
bool initial_offerer() const override {
RTC_DCHECK_RUN_ON(signaling_thread());
return sdp_handler_->initial_offerer();
}
std::vector<
rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>>
GetTransceiversInternal() const override {
RTC_DCHECK_RUN_ON(signaling_thread());
if (!ConfiguredForMedia()) {
return {};
}
return rtp_manager()->transceivers()->List();
}
std::vector<DataChannelStats> GetDataChannelStats() const override;
absl::optional<std::string> sctp_transport_name() const override;
absl::optional<std::string> sctp_mid() const override;
cricket::CandidateStatsList GetPooledCandidateStats() const override;
std::map<std::string, cricket::TransportStats> GetTransportStatsByNames(
const std::set<std::string>& transport_names) override;
Call::Stats GetCallStats() override;
absl::optional<AudioDeviceModule::Stats> GetAudioDeviceStats() override;
bool GetLocalCertificate(
const std::string& transport_name,
rtc::scoped_refptr<rtc::RTCCertificate>* certificate) override;
std::unique_ptr<rtc::SSLCertChain> GetRemoteSSLCertChain(
const std::string& transport_name) override;
bool IceRestartPending(const std::string& content_name) const override;
bool NeedsIceRestart(const std::string& content_name) const override;
bool GetSslRole(const std::string& content_name, rtc::SSLRole* role) override;
// Functions needed by DataChannelController
void NoteDataAddedEvent() override { NoteUsageEvent(UsageEvent::DATA_ADDED); }
// Returns the observer. Will crash on CHECK if the observer is removed.
PeerConnectionObserver* Observer() const override;
bool IsClosed() const override {
RTC_DCHECK_RUN_ON(signaling_thread());
return !sdp_handler_ ||
sdp_handler_->signaling_state() == PeerConnectionInterface::kClosed;
}
// Get current SSL role used by SCTP's underlying transport.
absl::optional<rtc::SSLRole> GetSctpSslRole_n() override;
void OnSctpDataChannelStateChanged(
int channel_id,
DataChannelInterface::DataState state) override;
bool ShouldFireNegotiationNeededEvent(uint32_t event_id) override;
// Functions needed by SdpOfferAnswerHandler
LegacyStatsCollector* legacy_stats() override {
RTC_DCHECK_RUN_ON(signaling_thread());
return legacy_stats_.get();
}
DataChannelController* data_channel_controller() override {
RTC_DCHECK_RUN_ON(signaling_thread());
return &data_channel_controller_;
}
bool dtls_enabled() const override {
RTC_DCHECK_RUN_ON(signaling_thread());
return dtls_enabled_;
}
const PeerConnectionInterface::RTCConfiguration* configuration()
const override {
RTC_DCHECK_RUN_ON(signaling_thread());
return &configuration_;
}
PeerConnectionMessageHandler* message_handler() override {
RTC_DCHECK_RUN_ON(signaling_thread());
return &message_handler_;
}
RtpTransmissionManager* rtp_manager() override { return rtp_manager_.get(); }
const RtpTransmissionManager* rtp_manager() const override {
return rtp_manager_.get();
}
JsepTransportController* transport_controller_s() override {
RTC_DCHECK_RUN_ON(signaling_thread());
return transport_controller_copy_;
}
JsepTransportController* transport_controller_n() override {
RTC_DCHECK_RUN_ON(network_thread());
return transport_controller_.get();
}
cricket::PortAllocator* port_allocator() override {
return port_allocator_.get();
}
Call* call_ptr() override { return call_ptr_; }
ConnectionContext* context() { return context_.get(); }
const PeerConnectionFactoryInterface::Options* options() const override {
return &options_;
}
void SetIceConnectionState(IceConnectionState new_state) override;
void NoteUsageEvent(UsageEvent event) override;
// Asynchronously adds a remote candidate on the network thread.
void AddRemoteCandidate(const std::string& mid,
const cricket::Candidate& candidate) override;
// Report the UMA metric BundleUsage for the given remote description.
void ReportSdpBundleUsage(
const SessionDescriptionInterface& remote_description) override;
// Report several UMA metrics on establishing the connection.
void ReportFirstConnectUsageMetrics() RTC_RUN_ON(signaling_thread());
// Returns true if the PeerConnection is configured to use Unified Plan
// semantics for creating offers/answers and setting local/remote
// descriptions. If this is true the RtpTransceiver API will also be available
// to the user. If this is false, Plan B semantics are assumed.
// TODO(bugs.webrtc.org/8530): Flip the default to be Unified Plan once
// sufficient time has passed.
bool IsUnifiedPlan() const override {
RTC_DCHECK_RUN_ON(signaling_thread());
return is_unified_plan_;
}
bool ValidateBundleSettings(
const cricket::SessionDescription* desc,
const std::map<std::string, const cricket::ContentGroup*>&
bundle_groups_by_mid) override;
bool CreateDataChannelTransport(absl::string_view mid) override;
void DestroyDataChannelTransport(RTCError error) override;
// Asynchronously calls SctpTransport::Start() on the network thread for
// `sctp_mid()` if set. Called as part of setting the local description.
void StartSctpTransport(int local_port,
int remote_port,
int max_message_size) override;
// Returns the CryptoOptions for this PeerConnection. This will always
// return the RTCConfiguration.crypto_options if set and will only default
// back to the PeerConnectionFactory settings if nothing was set.
CryptoOptions GetCryptoOptions() override;
// Internal implementation for AddTransceiver family of methods. If
// `fire_callback` is set, fires OnRenegotiationNeeded callback if successful.
RTCErrorOr<rtc::scoped_refptr<RtpTransceiverInterface>> AddTransceiver(
cricket::MediaType media_type,
rtc::scoped_refptr<MediaStreamTrackInterface> track,
const RtpTransceiverInit& init,
bool fire_callback = true) override;
// Returns true if SRTP (either using DTLS-SRTP or SDES) is required by
// this session.
bool SrtpRequired() const override;
absl::optional<std::string> SetupDataChannelTransport_n(absl::string_view mid)
RTC_RUN_ON(network_thread());
void TeardownDataChannelTransport_n(RTCError error)
RTC_RUN_ON(network_thread());
const FieldTrialsView& trials() const override { return env_.field_trials(); }
bool ConfiguredForMedia() const;
// Functions made public for testing.
void ReturnHistogramVeryQuicklyForTesting() {
RTC_DCHECK_RUN_ON(signaling_thread());
return_histogram_very_quickly_ = true;
}
void RequestUsagePatternReportForTesting();
NetworkControllerInterface* GetNetworkController() override {
if (!worker_thread()->IsCurrent()) {
return worker_thread()->BlockingCall(
[this]() { return GetNetworkController(); });
}
RTC_DCHECK_RUN_ON(worker_thread());
RTC_DCHECK(call_);
return call_->GetTransportControllerSend()->GetNetworkController();
}
protected:
// Available for rtc::scoped_refptr creation
PeerConnection(const Environment& env,
rtc::scoped_refptr<ConnectionContext> context,
const PeerConnectionFactoryInterface::Options& options,
bool is_unified_plan,
std::unique_ptr<Call> call,
PeerConnectionDependencies& dependencies,
bool dtls_enabled);
~PeerConnection() override;
private:
RTCError Initialize(
const PeerConnectionInterface::RTCConfiguration& configuration,
PeerConnectionDependencies dependencies);
JsepTransportController* InitializeTransportController_n(
const RTCConfiguration& configuration,
const PeerConnectionDependencies& dependencies)
RTC_RUN_ON(network_thread());
rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
FindTransceiverBySender(rtc::scoped_refptr<RtpSenderInterface> sender)
RTC_RUN_ON(signaling_thread());
void SetStandardizedIceConnectionState(
PeerConnectionInterface::IceConnectionState new_state)
RTC_RUN_ON(signaling_thread());
void SetConnectionState(
PeerConnectionInterface::PeerConnectionState new_state)
RTC_RUN_ON(signaling_thread());
// Called any time the IceGatheringState changes.
void OnIceGatheringChange(IceGatheringState new_state)
RTC_RUN_ON(signaling_thread());
// New ICE candidate has been gathered.
void OnIceCandidate(std::unique_ptr<IceCandidateInterface> candidate)
RTC_RUN_ON(signaling_thread());
// Gathering of an ICE candidate failed.
void OnIceCandidateError(const std::string& address,
int port,
const std::string& url,
int error_code,
const std::string& error_text)
RTC_RUN_ON(signaling_thread());
// Some local ICE candidates have been removed.
void OnIceCandidatesRemoved(const std::vector<cricket::Candidate>& candidates)
RTC_RUN_ON(signaling_thread());
void OnSelectedCandidatePairChanged(
const cricket::CandidatePairChangeEvent& event)
RTC_RUN_ON(signaling_thread());
void OnNegotiationNeeded();
// Called when first configuring the port allocator.
struct InitializePortAllocatorResult {
bool enable_ipv6;
};
InitializePortAllocatorResult InitializePortAllocator_n(
const cricket::ServerAddresses& stun_servers,
const std::vector<cricket::RelayServerConfig>& turn_servers,
const RTCConfiguration& configuration);
// Called when SetConfiguration is called to apply the supported subset
// of the configuration on the network thread.
bool ReconfigurePortAllocator_n(
const cricket::ServerAddresses& stun_servers,
const std::vector<cricket::RelayServerConfig>& turn_servers,
IceTransportsType type,
int candidate_pool_size,
PortPrunePolicy turn_port_prune_policy,
TurnCustomizer* turn_customizer,
absl::optional<int> stun_candidate_keepalive_interval,
bool have_local_description);
// Starts output of an RTC event log to the given output object.
// This function should only be called from the worker thread.
bool StartRtcEventLog_w(std::unique_ptr<RtcEventLogOutput> output,
int64_t output_period_ms);
// Stops recording an RTC event log.
// This function should only be called from the worker thread.
void StopRtcEventLog_w();
// Returns true and the TransportInfo of the given `content_name`
// from `description`. Returns false if it's not available.
static bool GetTransportDescription(
const cricket::SessionDescription* description,
const std::string& content_name,
cricket::TransportDescription* info);
// Returns the media index for a local ice candidate given the content name.
// Returns false if the local session description does not have a media
// content called `content_name`.
bool GetLocalCandidateMediaIndex(const std::string& content_name,
int* sdp_mline_index)
RTC_RUN_ON(signaling_thread());
// JsepTransportController signal handlers.
void OnTransportControllerConnectionState(cricket::IceConnectionState state)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerGatheringState(cricket::IceGatheringState state)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerCandidatesGathered(
const std::string& transport_name,
const std::vector<cricket::Candidate>& candidates)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerCandidateError(
const cricket::IceCandidateErrorEvent& event)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerCandidatesRemoved(
const std::vector<cricket::Candidate>& candidates)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerCandidateChanged(
const cricket::CandidatePairChangeEvent& event)
RTC_RUN_ON(signaling_thread());
void OnTransportControllerDtlsHandshakeError(rtc::SSLHandshakeError error);
// Invoked when TransportController connection completion is signaled.
// Reports stats for all transports in use.
void ReportTransportStats(std::vector<RtpTransceiverProxyRefPtr> transceivers)
RTC_RUN_ON(network_thread());
// Gather the usage of IPv4/IPv6 as best connection.
static void ReportBestConnectionState(const cricket::TransportStats& stats);
static void ReportNegotiatedCiphers(
bool dtls_enabled,
const cricket::TransportStats& stats,
const std::set<cricket::MediaType>& media_types);
void ReportIceCandidateCollected(const cricket::Candidate& candidate)
RTC_RUN_ON(signaling_thread());
void ReportUsagePattern() const RTC_RUN_ON(signaling_thread());
void ReportRemoteIceCandidateAdded(const cricket::Candidate& candidate);
// JsepTransportController::Observer override.
//
// Called by `transport_controller_` when processing transport information
// from a session description, and the mapping from m= sections to transports
// changed (as a result of BUNDLE negotiation, or m= sections being
// rejected).
bool OnTransportChanged(
const std::string& mid,
RtpTransportInternal* rtp_transport,
rtc::scoped_refptr<DtlsTransport> dtls_transport,
DataChannelTransportInterface* data_channel_transport) override;
void SetSctpTransportName(std::string sctp_transport_name);
std::function<void(const rtc::CopyOnWriteBuffer& packet,
int64_t packet_time_us)>
InitializeRtcpCallback();
std::function<void(const RtpPacketReceived& parsed_packet)>
InitializeUnDemuxablePacketHandler();
const Environment env_;
const rtc::scoped_refptr<ConnectionContext> context_;
const PeerConnectionFactoryInterface::Options options_;
PeerConnectionObserver* observer_ RTC_GUARDED_BY(signaling_thread()) =
nullptr;
const bool is_unified_plan_;
IceConnectionState ice_connection_state_ RTC_GUARDED_BY(signaling_thread()) =
kIceConnectionNew;
PeerConnectionInterface::IceConnectionState standardized_ice_connection_state_
RTC_GUARDED_BY(signaling_thread()) = kIceConnectionNew;
PeerConnectionInterface::PeerConnectionState connection_state_
RTC_GUARDED_BY(signaling_thread()) = PeerConnectionState::kNew;
IceGatheringState ice_gathering_state_ RTC_GUARDED_BY(signaling_thread()) =
kIceGatheringNew;
PeerConnectionInterface::RTCConfiguration configuration_
RTC_GUARDED_BY(signaling_thread());
const std::unique_ptr<AsyncDnsResolverFactoryInterface>
async_dns_resolver_factory_;
std::unique_ptr<cricket::PortAllocator>
port_allocator_; // TODO(bugs.webrtc.org/9987): Accessed on both
// signaling and network thread.
const std::unique_ptr<IceTransportFactory>
ice_transport_factory_; // TODO(bugs.webrtc.org/9987): Accessed on the
// signaling thread but the underlying raw
// pointer is given to
// `jsep_transport_controller_` and used on the
// network thread.
const std::unique_ptr<rtc::SSLCertificateVerifier> tls_cert_verifier_
RTC_GUARDED_BY(network_thread());
// The unique_ptr belongs to the worker thread, but the Call object manages
// its own thread safety.
std::unique_ptr<Call> call_ RTC_GUARDED_BY(worker_thread());
ScopedTaskSafety signaling_thread_safety_;
rtc::scoped_refptr<PendingTaskSafetyFlag> network_thread_safety_;
rtc::scoped_refptr<PendingTaskSafetyFlag> worker_thread_safety_;
// Points to the same thing as `call_`. Since it's const, we may read the
// pointer from any thread.
// TODO(bugs.webrtc.org/11992): Remove this workaround (and potential dangling
// pointer).
Call* const call_ptr_;
std::unique_ptr<LegacyStatsCollector> legacy_stats_
RTC_GUARDED_BY(signaling_thread()); // A pointer is passed to senders_
rtc::scoped_refptr<RTCStatsCollector> stats_collector_
RTC_GUARDED_BY(signaling_thread());
const std::string session_id_;
// The transport controller is set and used on the network thread.
// Some functions pass the value of the transport_controller_ pointer
// around as arguments while running on the signaling thread; these
// use the transport_controller_copy.
std::unique_ptr<JsepTransportController> transport_controller_
RTC_GUARDED_BY(network_thread());
JsepTransportController* transport_controller_copy_
RTC_GUARDED_BY(signaling_thread()) = nullptr;
// `sctp_mid_` is the content name (MID) in SDP.
// Note: this is used as the data channel MID by both SCTP and data channel
// transports. It is set when either transport is initialized and unset when
// both transports are deleted.
// There is one copy on the signaling thread and another copy on the
// networking thread. Changes are always initiated from the signaling
// thread, but applied first on the networking thread via an invoke().
absl::optional<std::string> sctp_mid_s_ RTC_GUARDED_BY(signaling_thread());
absl::optional<std::string> sctp_mid_n_ RTC_GUARDED_BY(network_thread());
std::string sctp_transport_name_s_ RTC_GUARDED_BY(signaling_thread());
// The machinery for handling offers and answers. Const after initialization.
std::unique_ptr<SdpOfferAnswerHandler> sdp_handler_
RTC_GUARDED_BY(signaling_thread()) RTC_PT_GUARDED_BY(signaling_thread());
const bool dtls_enabled_;
UsagePattern usage_pattern_ RTC_GUARDED_BY(signaling_thread());
bool return_histogram_very_quickly_ RTC_GUARDED_BY(signaling_thread()) =
false;
// The DataChannelController is accessed from both the signaling thread
// and networking thread. It is a thread-aware object.
DataChannelController data_channel_controller_;
// Machinery for handling messages posted to oneself
PeerConnectionMessageHandler message_handler_
RTC_GUARDED_BY(signaling_thread());
// Administration of senders, receivers and transceivers
// Accessed on both signaling and network thread. Const after Initialize().
std::unique_ptr<RtpTransmissionManager> rtp_manager_;
// Did the connectionState ever change to `connected`?
// Used to gather metrics only the first such state change.
bool was_ever_connected_ RTC_GUARDED_BY(signaling_thread()) = false;
// This variable needs to be the last one in the class.
rtc::WeakPtrFactory<PeerConnection> weak_factory_;
};
} // namespace webrtc
#endif // PC_PEER_CONNECTION_H_