| /* |
| * Copyright 2004 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 <algorithm> |
| #include <iterator> |
| #include <utility> |
| |
| #include "pc/channel.h" |
| |
| #include "api/call/audio_sink.h" |
| #include "media/base/mediaconstants.h" |
| #include "media/base/rtputils.h" |
| #include "rtc_base/bind.h" |
| #include "rtc_base/byteorder.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/copyonwritebuffer.h" |
| #include "rtc_base/dscp.h" |
| #include "rtc_base/logging.h" |
| #include "rtc_base/networkroute.h" |
| #include "rtc_base/ptr_util.h" |
| #include "rtc_base/trace_event.h" |
| // Adding 'nogncheck' to disable the gn include headers check to support modular |
| // WebRTC build targets. |
| #include "media/engine/webrtcvoiceengine.h" // nogncheck |
| #include "p2p/base/packettransportinternal.h" |
| #include "pc/channelmanager.h" |
| #include "pc/rtpmediautils.h" |
| |
| namespace cricket { |
| using rtc::Bind; |
| using webrtc::SdpType; |
| |
| namespace { |
| |
| struct SendPacketMessageData : public rtc::MessageData { |
| rtc::CopyOnWriteBuffer packet; |
| rtc::PacketOptions options; |
| }; |
| |
| } // namespace |
| |
| enum { |
| MSG_SEND_RTP_PACKET = 1, |
| MSG_SEND_RTCP_PACKET, |
| MSG_READYTOSENDDATA, |
| MSG_DATARECEIVED, |
| MSG_FIRSTPACKETRECEIVED, |
| }; |
| |
| static void SafeSetError(const std::string& message, std::string* error_desc) { |
| if (error_desc) { |
| *error_desc = message; |
| } |
| } |
| |
| static bool ValidPacket(bool rtcp, const rtc::CopyOnWriteBuffer* packet) { |
| // Check the packet size. We could check the header too if needed. |
| return packet && IsValidRtpRtcpPacketSize(rtcp, packet->size()); |
| } |
| |
| template <class Codec> |
| void RtpParametersFromMediaDescription( |
| const MediaContentDescriptionImpl<Codec>* desc, |
| const RtpHeaderExtensions& extensions, |
| RtpParameters<Codec>* params) { |
| // TODO(pthatcher): Remove this once we're sure no one will give us |
| // a description without codecs. Currently the ORTC implementation is relying |
| // on this. |
| if (desc->has_codecs()) { |
| params->codecs = desc->codecs(); |
| } |
| // TODO(pthatcher): See if we really need |
| // rtp_header_extensions_set() and remove it if we don't. |
| if (desc->rtp_header_extensions_set()) { |
| params->extensions = extensions; |
| } |
| params->rtcp.reduced_size = desc->rtcp_reduced_size(); |
| } |
| |
| template <class Codec> |
| void RtpSendParametersFromMediaDescription( |
| const MediaContentDescriptionImpl<Codec>* desc, |
| const RtpHeaderExtensions& extensions, |
| RtpSendParameters<Codec>* send_params) { |
| RtpParametersFromMediaDescription(desc, extensions, send_params); |
| send_params->max_bandwidth_bps = desc->bandwidth(); |
| } |
| |
| BaseChannel::BaseChannel(rtc::Thread* worker_thread, |
| rtc::Thread* network_thread, |
| rtc::Thread* signaling_thread, |
| std::unique_ptr<MediaChannel> media_channel, |
| const std::string& content_name, |
| bool rtcp_mux_required, |
| bool srtp_required) |
| : worker_thread_(worker_thread), |
| network_thread_(network_thread), |
| signaling_thread_(signaling_thread), |
| content_name_(content_name), |
| rtcp_mux_required_(rtcp_mux_required), |
| unencrypted_rtp_transport_( |
| rtc::MakeUnique<webrtc::RtpTransport>(rtcp_mux_required)), |
| srtp_required_(srtp_required), |
| media_channel_(std::move(media_channel)) { |
| RTC_DCHECK_RUN_ON(worker_thread_); |
| rtp_transport_ = unencrypted_rtp_transport_.get(); |
| ConnectToRtpTransport(); |
| RTC_LOG(LS_INFO) << "Created channel for " << content_name; |
| } |
| |
| BaseChannel::~BaseChannel() { |
| TRACE_EVENT0("webrtc", "BaseChannel::~BaseChannel"); |
| RTC_DCHECK_RUN_ON(worker_thread_); |
| Deinit(); |
| // Eats any outstanding messages or packets. |
| worker_thread_->Clear(&invoker_); |
| worker_thread_->Clear(this); |
| // We must destroy the media channel before the transport channel, otherwise |
| // the media channel may try to send on the dead transport channel. NULLing |
| // is not an effective strategy since the sends will come on another thread. |
| media_channel_.reset(); |
| RTC_LOG(LS_INFO) << "Destroyed channel: " << content_name_; |
| } |
| |
| void BaseChannel::ConnectToRtpTransport() { |
| RTC_DCHECK(rtp_transport_); |
| rtp_transport_->SignalReadyToSend.connect( |
| this, &BaseChannel::OnTransportReadyToSend); |
| // TODO(zstein): RtpTransport::SignalPacketReceived will probably be replaced |
| // with a callback interface later so that the demuxer can select which |
| // channel to signal. |
| rtp_transport_->SignalPacketReceived.connect(this, |
| &BaseChannel::OnPacketReceived); |
| rtp_transport_->SignalNetworkRouteChanged.connect( |
| this, &BaseChannel::OnNetworkRouteChanged); |
| rtp_transport_->SignalWritableState.connect(this, |
| &BaseChannel::OnWritableState); |
| rtp_transport_->SignalSentPacket.connect(this, |
| &BaseChannel::SignalSentPacket_n); |
| // TODO(bugs.webrtc.org/8587): Set the metrics observer through |
| // JsepTransportController once it takes responsibility for creating |
| // RtpTransports. |
| if (metrics_observer_) { |
| rtp_transport_->SetMetricsObserver(metrics_observer_); |
| } |
| } |
| |
| void BaseChannel::DisconnectFromRtpTransport() { |
| RTC_DCHECK(rtp_transport_); |
| rtp_transport_->SignalReadyToSend.disconnect(this); |
| rtp_transport_->SignalPacketReceived.disconnect(this); |
| rtp_transport_->SignalNetworkRouteChanged.disconnect(this); |
| rtp_transport_->SignalWritableState.disconnect(this); |
| rtp_transport_->SignalSentPacket.disconnect(this); |
| rtp_transport_->SetMetricsObserver(nullptr); |
| } |
| |
| void BaseChannel::Init_w(DtlsTransportInternal* rtp_dtls_transport, |
| DtlsTransportInternal* rtcp_dtls_transport, |
| rtc::PacketTransportInternal* rtp_packet_transport, |
| rtc::PacketTransportInternal* rtcp_packet_transport) { |
| RTC_DCHECK_RUN_ON(worker_thread_); |
| network_thread_->Invoke<void>(RTC_FROM_HERE, [&] { |
| SetTransports_n(rtp_dtls_transport, rtcp_dtls_transport, |
| rtp_packet_transport, rtcp_packet_transport); |
| |
| if (rtcp_mux_required_) { |
| rtcp_mux_filter_.SetActive(); |
| } |
| }); |
| |
| // Both RTP and RTCP channels should be set, we can call SetInterface on |
| // the media channel and it can set network options. |
| media_channel_->SetInterface(this); |
| } |
| |
| void BaseChannel::Init_w(webrtc::RtpTransportInternal* rtp_transport) { |
| RTC_DCHECK_RUN_ON(worker_thread_); |
| network_thread_->Invoke<void>(RTC_FROM_HERE, [&] { |
| SetRtpTransport(rtp_transport); |
| |
| if (rtcp_mux_required_) { |
| rtcp_mux_filter_.SetActive(); |
| } |
| }); |
| |
| // Both RTP and RTCP channels should be set, we can call SetInterface on |
| // the media channel and it can set network options. |
| media_channel_->SetInterface(this); |
| } |
| |
| void BaseChannel::Deinit() { |
| RTC_DCHECK(worker_thread_->IsCurrent()); |
| media_channel_->SetInterface(NULL); |
| // Packets arrive on the network thread, processing packets calls virtual |
| // functions, so need to stop this process in Deinit that is called in |
| // derived classes destructor. |
| network_thread_->Invoke<void>(RTC_FROM_HERE, [&] { |
| FlushRtcpMessages_n(); |
| |
| if (dtls_srtp_transport_) { |
| dtls_srtp_transport_->SetDtlsTransports(nullptr, nullptr); |
| } else { |
| rtp_transport_->SetRtpPacketTransport(nullptr); |
| rtp_transport_->SetRtcpPacketTransport(nullptr); |
| } |
| // Clear pending read packets/messages. |
| network_thread_->Clear(&invoker_); |
| network_thread_->Clear(this); |
| }); |
| } |
| |
| void BaseChannel::SetRtpTransport(webrtc::RtpTransportInternal* rtp_transport) { |
| if (!network_thread_->IsCurrent()) { |
| network_thread_->Invoke<void>(RTC_FROM_HERE, [&] { |
| SetRtpTransport(rtp_transport); |
| return; |
| }); |
| } |
| |
| RTC_DCHECK(rtp_transport); |
| |
| if (rtp_transport_) { |
| DisconnectFromRtpTransport(); |
| } |
| rtp_transport_ = rtp_transport; |
| RTC_LOG(LS_INFO) << "Setting the RtpTransport for " << content_name(); |
| ConnectToRtpTransport(); |
| |
| UpdateWritableState_n(); |
| } |
| |
| void BaseChannel::SetTransports(DtlsTransportInternal* rtp_dtls_transport, |
| DtlsTransportInternal* rtcp_dtls_transport) { |
| network_thread_->Invoke<void>( |
| RTC_FROM_HERE, |
| Bind(&BaseChannel::SetTransports_n, this, rtp_dtls_transport, |
| rtcp_dtls_transport, rtp_dtls_transport, rtcp_dtls_transport)); |
| } |
| |
| void BaseChannel::SetTransports( |
| rtc::PacketTransportInternal* rtp_packet_transport, |
| rtc::PacketTransportInternal* rtcp_packet_transport) { |
| network_thread_->Invoke<void>( |
| RTC_FROM_HERE, Bind(&BaseChannel::SetTransports_n, this, nullptr, nullptr, |
| rtp_packet_transport, rtcp_packet_transport)); |
| } |
| |
| void BaseChannel::SetTransports_n( |
| DtlsTransportInternal* rtp_dtls_transport, |
| DtlsTransportInternal* rtcp_dtls_transport, |
| rtc::PacketTransportInternal* rtp_packet_transport, |
| rtc::PacketTransportInternal* rtcp_packet_transport) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| // Validate some assertions about the input. |
| RTC_DCHECK(rtp_packet_transport); |
| RTC_DCHECK_EQ(NeedsRtcpTransport(), rtcp_packet_transport != nullptr); |
| if (rtp_dtls_transport || rtcp_dtls_transport) { |
| // DTLS/non-DTLS pointers should be to the same object. |
| RTC_DCHECK(rtp_dtls_transport == rtp_packet_transport); |
| RTC_DCHECK(rtcp_dtls_transport == rtcp_packet_transport); |
| // Can't go from non-DTLS to DTLS. |
| RTC_DCHECK(!rtp_transport_->rtp_packet_transport() || rtp_dtls_transport_); |
| } else { |
| // Can't go from DTLS to non-DTLS. |
| RTC_DCHECK(!rtp_dtls_transport_); |
| } |
| // Transport names should be the same. |
| if (rtp_dtls_transport && rtcp_dtls_transport) { |
| RTC_DCHECK(rtp_dtls_transport->transport_name() == |
| rtcp_dtls_transport->transport_name()); |
| } |
| |
| if (rtp_packet_transport == rtp_transport_->rtp_packet_transport()) { |
| // Nothing to do if transport isn't changing. |
| return; |
| } |
| |
| std::string debug_name; |
| if (rtp_dtls_transport) { |
| transport_name_ = rtp_dtls_transport->transport_name(); |
| debug_name = transport_name_; |
| } else { |
| debug_name = rtp_packet_transport->transport_name(); |
| } |
| // If this BaseChannel doesn't require RTCP mux and we haven't fully |
| // negotiated RTCP mux, we need an RTCP transport. |
| if (rtcp_packet_transport) { |
| RTC_LOG(LS_INFO) << "Setting RTCP Transport for " << content_name() |
| << " on " << debug_name << " transport " |
| << rtcp_packet_transport; |
| SetTransport_n(/*rtcp=*/true, rtcp_dtls_transport, rtcp_packet_transport); |
| } |
| |
| RTC_LOG(LS_INFO) << "Setting RTP Transport for " << content_name() << " on " |
| << debug_name << " transport " << rtp_packet_transport; |
| SetTransport_n(/*rtcp=*/false, rtp_dtls_transport, rtp_packet_transport); |
| |
| // Set DtlsTransport/PacketTransport for RTP-level transport. |
| if ((rtp_dtls_transport_ || rtcp_dtls_transport_) && dtls_srtp_transport_) { |
| // When setting the transport with non-null |dtls_srtp_transport_|, we are |
| // using DTLS-SRTP. This could happen for bundling. If the |
| // |dtls_srtp_transport| is null, we cannot tell if it doing DTLS-SRTP or |
| // SDES until the description is set. So don't call |EnableDtlsSrtp_n| here. |
| dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport, |
| rtcp_dtls_transport); |
| } else { |
| rtp_transport_->SetRtpPacketTransport(rtp_packet_transport); |
| rtp_transport_->SetRtcpPacketTransport(rtcp_packet_transport); |
| } |
| |
| // Update aggregate writable/ready-to-send state between RTP and RTCP upon |
| // setting new transport channels. |
| UpdateWritableState_n(); |
| } |
| |
| void BaseChannel::SetTransport_n( |
| bool rtcp, |
| DtlsTransportInternal* new_dtls_transport, |
| rtc::PacketTransportInternal* new_packet_transport) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| if (new_dtls_transport) { |
| RTC_DCHECK(new_dtls_transport == new_packet_transport); |
| } |
| DtlsTransportInternal*& old_dtls_transport = |
| rtcp ? rtcp_dtls_transport_ : rtp_dtls_transport_; |
| rtc::PacketTransportInternal* old_packet_transport = |
| rtcp ? rtp_transport_->rtcp_packet_transport() |
| : rtp_transport_->rtp_packet_transport(); |
| |
| if (!old_packet_transport && !new_packet_transport) { |
| // Nothing to do. |
| return; |
| } |
| |
| RTC_DCHECK(old_packet_transport != new_packet_transport); |
| |
| old_dtls_transport = new_dtls_transport; |
| |
| // If there's no new transport, we're done. |
| if (!new_packet_transport) { |
| return; |
| } |
| |
| if (rtcp && new_dtls_transport) { |
| RTC_CHECK(!(ShouldSetupDtlsSrtp_n() && srtp_active())) |
| << "Setting RTCP for DTLS/SRTP after the DTLS is active " |
| << "should never happen."; |
| } |
| |
| auto& socket_options = rtcp ? rtcp_socket_options_ : socket_options_; |
| for (const auto& pair : socket_options) { |
| new_packet_transport->SetOption(pair.first, pair.second); |
| } |
| } |
| |
| void BaseChannel::SetMetricsObserver( |
| rtc::scoped_refptr<webrtc::MetricsObserverInterface> metrics_observer) { |
| metrics_observer_ = metrics_observer; |
| if (rtp_transport_) { |
| rtp_transport_->SetMetricsObserver(metrics_observer); |
| } |
| } |
| |
| bool BaseChannel::Enable(bool enable) { |
| worker_thread_->Invoke<void>( |
| RTC_FROM_HERE, |
| Bind(enable ? &BaseChannel::EnableMedia_w : &BaseChannel::DisableMedia_w, |
| this)); |
| return true; |
| } |
| |
| bool BaseChannel::AddRecvStream(const StreamParams& sp) { |
| return InvokeOnWorker<bool>(RTC_FROM_HERE, |
| Bind(&BaseChannel::AddRecvStream_w, this, sp)); |
| } |
| |
| bool BaseChannel::RemoveRecvStream(uint32_t ssrc) { |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, Bind(&BaseChannel::RemoveRecvStream_w, this, ssrc)); |
| } |
| |
| bool BaseChannel::AddSendStream(const StreamParams& sp) { |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, Bind(&MediaChannel::AddSendStream, media_channel(), sp)); |
| } |
| |
| bool BaseChannel::RemoveSendStream(uint32_t ssrc) { |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, |
| Bind(&MediaChannel::RemoveSendStream, media_channel(), ssrc)); |
| } |
| |
| bool BaseChannel::SetLocalContent(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "BaseChannel::SetLocalContent"); |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, |
| Bind(&BaseChannel::SetLocalContent_w, this, content, type, error_desc)); |
| } |
| |
| bool BaseChannel::SetRemoteContent(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "BaseChannel::SetRemoteContent"); |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, |
| Bind(&BaseChannel::SetRemoteContent_w, this, content, type, error_desc)); |
| } |
| |
| bool BaseChannel::NeedsRtcpTransport() { |
| // If this BaseChannel doesn't require RTCP mux and we haven't fully |
| // negotiated RTCP mux, we need an RTCP transport. |
| return !rtcp_mux_required_ && !rtcp_mux_filter_.IsFullyActive(); |
| } |
| |
| bool BaseChannel::IsReadyToReceiveMedia_w() const { |
| // Receive data if we are enabled and have local content, |
| return enabled() && |
| webrtc::RtpTransceiverDirectionHasRecv(local_content_direction_); |
| } |
| |
| bool BaseChannel::IsReadyToSendMedia_w() const { |
| // Need to access some state updated on the network thread. |
| return network_thread_->Invoke<bool>( |
| RTC_FROM_HERE, Bind(&BaseChannel::IsReadyToSendMedia_n, this)); |
| } |
| |
| bool BaseChannel::IsReadyToSendMedia_n() const { |
| // Send outgoing data if we are enabled, have local and remote content, |
| // and we have had some form of connectivity. |
| return enabled() && |
| webrtc::RtpTransceiverDirectionHasRecv(remote_content_direction_) && |
| webrtc::RtpTransceiverDirectionHasSend(local_content_direction_) && |
| was_ever_writable() && (srtp_active() || !ShouldSetupDtlsSrtp_n()); |
| } |
| |
| bool BaseChannel::SendPacket(rtc::CopyOnWriteBuffer* packet, |
| const rtc::PacketOptions& options) { |
| return SendPacket(false, packet, options); |
| } |
| |
| bool BaseChannel::SendRtcp(rtc::CopyOnWriteBuffer* packet, |
| const rtc::PacketOptions& options) { |
| return SendPacket(true, packet, options); |
| } |
| |
| int BaseChannel::SetOption(SocketType type, rtc::Socket::Option opt, |
| int value) { |
| return network_thread_->Invoke<int>( |
| RTC_FROM_HERE, Bind(&BaseChannel::SetOption_n, this, type, opt, value)); |
| } |
| |
| int BaseChannel::SetOption_n(SocketType type, |
| rtc::Socket::Option opt, |
| int value) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| rtc::PacketTransportInternal* transport = nullptr; |
| switch (type) { |
| case ST_RTP: |
| transport = rtp_transport_->rtp_packet_transport(); |
| socket_options_.push_back( |
| std::pair<rtc::Socket::Option, int>(opt, value)); |
| break; |
| case ST_RTCP: |
| transport = rtp_transport_->rtcp_packet_transport(); |
| rtcp_socket_options_.push_back( |
| std::pair<rtc::Socket::Option, int>(opt, value)); |
| break; |
| } |
| return transport ? transport->SetOption(opt, value) : -1; |
| } |
| |
| void BaseChannel::OnWritableState(bool writable) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| if (writable) { |
| // This is used to cover the scenario when the DTLS handshake is completed |
| // and DtlsTransport becomes writable before the remote description is set. |
| if (ShouldSetupDtlsSrtp_n()) { |
| EnableDtlsSrtp_n(); |
| } |
| ChannelWritable_n(); |
| } else { |
| ChannelNotWritable_n(); |
| } |
| } |
| |
| void BaseChannel::OnNetworkRouteChanged( |
| rtc::Optional<rtc::NetworkRoute> network_route) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| rtc::NetworkRoute new_route; |
| if (network_route) { |
| new_route = *(network_route); |
| } |
| // Note: When the RTCP-muxing is not enabled, RTCP transport and RTP transport |
| // use the same transport name and MediaChannel::OnNetworkRouteChanged cannot |
| // work correctly. Intentionally leave it broken to simplify the code and |
| // encourage the users to stop using non-muxing RTCP. |
| invoker_.AsyncInvoke<void>(RTC_FROM_HERE, worker_thread_, [=] { |
| media_channel_->OnNetworkRouteChanged(transport_name_, new_route); |
| }); |
| } |
| |
| void BaseChannel::OnTransportReadyToSend(bool ready) { |
| invoker_.AsyncInvoke<void>(RTC_FROM_HERE, worker_thread_, |
| [=] { media_channel_->OnReadyToSend(ready); }); |
| } |
| |
| bool BaseChannel::SendPacket(bool rtcp, |
| rtc::CopyOnWriteBuffer* packet, |
| const rtc::PacketOptions& options) { |
| // SendPacket gets called from MediaEngine, on a pacer or an encoder thread. |
| // If the thread is not our network thread, we will post to our network |
| // so that the real work happens on our network. This avoids us having to |
| // synchronize access to all the pieces of the send path, including |
| // SRTP and the inner workings of the transport channels. |
| // The only downside is that we can't return a proper failure code if |
| // needed. Since UDP is unreliable anyway, this should be a non-issue. |
| if (!network_thread_->IsCurrent()) { |
| // Avoid a copy by transferring the ownership of the packet data. |
| int message_id = rtcp ? MSG_SEND_RTCP_PACKET : MSG_SEND_RTP_PACKET; |
| SendPacketMessageData* data = new SendPacketMessageData; |
| data->packet = std::move(*packet); |
| data->options = options; |
| network_thread_->Post(RTC_FROM_HERE, this, message_id, data); |
| return true; |
| } |
| TRACE_EVENT0("webrtc", "BaseChannel::SendPacket"); |
| |
| // Now that we are on the correct thread, ensure we have a place to send this |
| // packet before doing anything. (We might get RTCP packets that we don't |
| // intend to send.) If we've negotiated RTCP mux, send RTCP over the RTP |
| // transport. |
| if (!rtp_transport_->IsWritable(rtcp)) { |
| return false; |
| } |
| |
| // Protect ourselves against crazy data. |
| if (!ValidPacket(rtcp, packet)) { |
| RTC_LOG(LS_ERROR) << "Dropping outgoing " << content_name_ << " " |
| << RtpRtcpStringLiteral(rtcp) |
| << " packet: wrong size=" << packet->size(); |
| return false; |
| } |
| |
| if (!srtp_active()) { |
| if (srtp_required_) { |
| // The audio/video engines may attempt to send RTCP packets as soon as the |
| // streams are created, so don't treat this as an error for RTCP. |
| // See: https://bugs.chromium.org/p/webrtc/issues/detail?id=6809 |
| if (rtcp) { |
| return false; |
| } |
| // However, there shouldn't be any RTP packets sent before SRTP is set up |
| // (and SetSend(true) is called). |
| RTC_LOG(LS_ERROR) |
| << "Can't send outgoing RTP packet when SRTP is inactive" |
| << " and crypto is required"; |
| RTC_NOTREACHED(); |
| return false; |
| } |
| |
| std::string packet_type = rtcp ? "RTCP" : "RTP"; |
| RTC_LOG(LS_WARNING) << "Sending an " << packet_type |
| << " packet without encryption."; |
| } else { |
| // Make sure we didn't accidentally send any packets without encryption. |
| RTC_DCHECK(rtp_transport_ == sdes_transport_.get() || |
| rtp_transport_ == dtls_srtp_transport_.get()); |
| } |
| // Bon voyage. |
| return rtcp ? rtp_transport_->SendRtcpPacket(packet, options, PF_SRTP_BYPASS) |
| : rtp_transport_->SendRtpPacket(packet, options, PF_SRTP_BYPASS); |
| } |
| |
| bool BaseChannel::HandlesPayloadType(int packet_type) const { |
| return rtp_transport_->HandlesPayloadType(packet_type); |
| } |
| |
| void BaseChannel::OnPacketReceived(bool rtcp, |
| rtc::CopyOnWriteBuffer* packet, |
| const rtc::PacketTime& packet_time) { |
| if (!has_received_packet_ && !rtcp) { |
| has_received_packet_ = true; |
| signaling_thread()->Post(RTC_FROM_HERE, this, MSG_FIRSTPACKETRECEIVED); |
| } |
| |
| if (!srtp_active() && srtp_required_) { |
| // Our session description indicates that SRTP is required, but we got a |
| // packet before our SRTP filter is active. This means either that |
| // a) we got SRTP packets before we received the SDES keys, in which case |
| // we can't decrypt it anyway, or |
| // b) we got SRTP packets before DTLS completed on both the RTP and RTCP |
| // transports, so we haven't yet extracted keys, even if DTLS did |
| // complete on the transport that the packets are being sent on. It's |
| // really good practice to wait for both RTP and RTCP to be good to go |
| // before sending media, to prevent weird failure modes, so it's fine |
| // for us to just eat packets here. This is all sidestepped if RTCP mux |
| // is used anyway. |
| RTC_LOG(LS_WARNING) |
| << "Can't process incoming " << RtpRtcpStringLiteral(rtcp) |
| << " packet when SRTP is inactive and crypto is required"; |
| return; |
| } |
| |
| invoker_.AsyncInvoke<void>( |
| RTC_FROM_HERE, worker_thread_, |
| Bind(&BaseChannel::ProcessPacket, this, rtcp, *packet, packet_time)); |
| } |
| |
| void BaseChannel::ProcessPacket(bool rtcp, |
| const rtc::CopyOnWriteBuffer& packet, |
| const rtc::PacketTime& packet_time) { |
| RTC_DCHECK(worker_thread_->IsCurrent()); |
| |
| // Need to copy variable because OnRtcpReceived/OnPacketReceived |
| // requires non-const pointer to buffer. This doesn't memcpy the actual data. |
| rtc::CopyOnWriteBuffer data(packet); |
| if (rtcp) { |
| media_channel_->OnRtcpReceived(&data, packet_time); |
| } else { |
| media_channel_->OnPacketReceived(&data, packet_time); |
| } |
| } |
| |
| void BaseChannel::EnableMedia_w() { |
| RTC_DCHECK(worker_thread_ == rtc::Thread::Current()); |
| if (enabled_) |
| return; |
| |
| RTC_LOG(LS_INFO) << "Channel enabled"; |
| enabled_ = true; |
| UpdateMediaSendRecvState_w(); |
| } |
| |
| void BaseChannel::DisableMedia_w() { |
| RTC_DCHECK(worker_thread_ == rtc::Thread::Current()); |
| if (!enabled_) |
| return; |
| |
| RTC_LOG(LS_INFO) << "Channel disabled"; |
| enabled_ = false; |
| UpdateMediaSendRecvState_w(); |
| } |
| |
| void BaseChannel::UpdateWritableState_n() { |
| rtc::PacketTransportInternal* rtp_packet_transport = |
| rtp_transport_->rtp_packet_transport(); |
| rtc::PacketTransportInternal* rtcp_packet_transport = |
| rtp_transport_->rtcp_packet_transport(); |
| if (rtp_packet_transport && rtp_packet_transport->writable() && |
| (!rtcp_packet_transport || rtcp_packet_transport->writable())) { |
| ChannelWritable_n(); |
| } else { |
| ChannelNotWritable_n(); |
| } |
| } |
| |
| void BaseChannel::ChannelWritable_n() { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| if (writable_) { |
| return; |
| } |
| |
| RTC_LOG(LS_INFO) << "Channel writable (" << content_name_ << ")" |
| << (was_ever_writable_ ? "" : " for the first time"); |
| |
| was_ever_writable_ = true; |
| writable_ = true; |
| UpdateMediaSendRecvState(); |
| } |
| |
| bool BaseChannel::ShouldSetupDtlsSrtp_n() const { |
| // Since DTLS is applied to all transports, checking RTP should be enough. |
| return rtp_dtls_transport_ && rtp_dtls_transport_->IsDtlsActive(); |
| } |
| |
| void BaseChannel::ChannelNotWritable_n() { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| if (!writable_) |
| return; |
| |
| RTC_LOG(LS_INFO) << "Channel not writable (" << content_name_ << ")"; |
| writable_ = false; |
| UpdateMediaSendRecvState(); |
| } |
| |
| bool BaseChannel::SetRtpTransportParameters( |
| const MediaContentDescription* content, |
| SdpType type, |
| ContentSource src, |
| const RtpHeaderExtensions& extensions, |
| std::string* error_desc) { |
| std::vector<int> encrypted_extension_ids; |
| for (const webrtc::RtpExtension& extension : extensions) { |
| if (extension.encrypt) { |
| RTC_LOG(LS_INFO) << "Using " << (src == CS_LOCAL ? "local" : "remote") |
| << " encrypted extension: " << extension.ToString(); |
| encrypted_extension_ids.push_back(extension.id); |
| } |
| } |
| |
| // Cache srtp_required_ for belt and suspenders check on SendPacket |
| return network_thread_->Invoke<bool>( |
| RTC_FROM_HERE, |
| Bind(&BaseChannel::SetRtpTransportParameters_n, this, content, type, src, |
| encrypted_extension_ids, error_desc)); |
| } |
| |
| bool BaseChannel::SetRtpTransportParameters_n( |
| const MediaContentDescription* content, |
| SdpType type, |
| ContentSource src, |
| const std::vector<int>& encrypted_extension_ids, |
| std::string* error_desc) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| |
| if (!SetSrtp_n(content->cryptos(), type, src, encrypted_extension_ids, |
| error_desc)) { |
| return false; |
| } |
| |
| if (!SetRtcpMux_n(content->rtcp_mux(), type, src, error_desc)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // |dtls| will be set to true if DTLS is active for transport and crypto is |
| // empty. |
| bool BaseChannel::CheckSrtpConfig_n(const std::vector<CryptoParams>& cryptos, |
| bool* dtls, |
| std::string* error_desc) { |
| *dtls = rtp_dtls_transport_ && rtp_dtls_transport_->IsDtlsActive(); |
| if (*dtls && !cryptos.empty()) { |
| SafeSetError("Cryptos must be empty when DTLS is active.", error_desc); |
| return false; |
| } |
| return true; |
| } |
| |
| void BaseChannel::EnableSdes_n() { |
| if (sdes_transport_) { |
| return; |
| } |
| // DtlsSrtpTransport and SrtpTransport shouldn't be enabled at the same |
| // time. |
| RTC_DCHECK(!dtls_srtp_transport_); |
| RTC_DCHECK(unencrypted_rtp_transport_); |
| sdes_transport_ = rtc::MakeUnique<webrtc::SrtpTransport>( |
| std::move(unencrypted_rtp_transport_)); |
| #if defined(ENABLE_EXTERNAL_AUTH) |
| sdes_transport_->EnableExternalAuth(); |
| #endif |
| SetRtpTransport(sdes_transport_.get()); |
| RTC_LOG(LS_INFO) << "Wrapping RtpTransport in SrtpTransport."; |
| } |
| |
| void BaseChannel::EnableDtlsSrtp_n() { |
| if (dtls_srtp_transport_) { |
| return; |
| } |
| // DtlsSrtpTransport and SrtpTransport shouldn't be enabled at the same |
| // time. |
| RTC_DCHECK(!sdes_transport_); |
| RTC_DCHECK(unencrypted_rtp_transport_); |
| |
| auto srtp_transport = rtc::MakeUnique<webrtc::SrtpTransport>( |
| std::move(unencrypted_rtp_transport_)); |
| #if defined(ENABLE_EXTERNAL_AUTH) |
| srtp_transport->EnableExternalAuth(); |
| #endif |
| dtls_srtp_transport_ = |
| rtc::MakeUnique<webrtc::DtlsSrtpTransport>(std::move(srtp_transport)); |
| |
| SetRtpTransport(dtls_srtp_transport_.get()); |
| if (cached_send_extension_ids_) { |
| dtls_srtp_transport_->UpdateSendEncryptedHeaderExtensionIds( |
| *cached_send_extension_ids_); |
| } |
| if (cached_recv_extension_ids_) { |
| dtls_srtp_transport_->UpdateRecvEncryptedHeaderExtensionIds( |
| *cached_recv_extension_ids_); |
| } |
| // Set the DtlsTransport and the |dtls_srtp_transport_| will handle the DTLS |
| // relate signal internally. |
| RTC_DCHECK(rtp_dtls_transport_); |
| dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport_, |
| rtcp_dtls_transport_); |
| |
| RTC_LOG(LS_INFO) << "Wrapping SrtpTransport in DtlsSrtpTransport."; |
| } |
| |
| bool BaseChannel::SetSrtp_n(const std::vector<CryptoParams>& cryptos, |
| SdpType type, |
| ContentSource src, |
| const std::vector<int>& encrypted_extension_ids, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "BaseChannel::SetSrtp_w"); |
| bool ret = false; |
| bool dtls = false; |
| ret = CheckSrtpConfig_n(cryptos, &dtls, error_desc); |
| if (!ret) { |
| return false; |
| } |
| |
| // If SRTP was not required, but we're setting a description that uses SDES, |
| // we need to upgrade to an SrtpTransport. |
| if (!sdes_transport_ && !dtls && !cryptos.empty()) { |
| EnableSdes_n(); |
| } |
| |
| if ((type == SdpType::kAnswer || type == SdpType::kPrAnswer) && dtls) { |
| EnableDtlsSrtp_n(); |
| } |
| |
| UpdateEncryptedHeaderExtensionIds(src, encrypted_extension_ids); |
| |
| if (!dtls) { |
| switch (type) { |
| case SdpType::kOffer: |
| ret = sdes_negotiator_.SetOffer(cryptos, src); |
| break; |
| case SdpType::kPrAnswer: |
| ret = sdes_negotiator_.SetProvisionalAnswer(cryptos, src); |
| break; |
| case SdpType::kAnswer: |
| ret = sdes_negotiator_.SetAnswer(cryptos, src); |
| break; |
| default: |
| break; |
| } |
| |
| // If setting an SDES answer succeeded, apply the negotiated parameters |
| // to the SRTP transport. |
| if ((type == SdpType::kPrAnswer || type == SdpType::kAnswer) && ret) { |
| if (sdes_negotiator_.send_cipher_suite() && |
| sdes_negotiator_.recv_cipher_suite()) { |
| RTC_DCHECK(cached_send_extension_ids_); |
| RTC_DCHECK(cached_recv_extension_ids_); |
| ret = sdes_transport_->SetRtpParams( |
| *(sdes_negotiator_.send_cipher_suite()), |
| sdes_negotiator_.send_key().data(), |
| static_cast<int>(sdes_negotiator_.send_key().size()), |
| *(cached_send_extension_ids_), |
| *(sdes_negotiator_.recv_cipher_suite()), |
| sdes_negotiator_.recv_key().data(), |
| static_cast<int>(sdes_negotiator_.recv_key().size()), |
| *(cached_recv_extension_ids_)); |
| } else { |
| RTC_LOG(LS_INFO) << "No crypto keys are provided for SDES."; |
| if (type == SdpType::kAnswer && sdes_transport_) { |
| // Explicitly reset the |sdes_transport_| if no crypto param is |
| // provided in the answer. No need to call |ResetParams()| for |
| // |sdes_negotiator_| because it resets the params inside |SetAnswer|. |
| sdes_transport_->ResetParams(); |
| } |
| } |
| } |
| } |
| |
| if (!ret) { |
| SafeSetError("Failed to setup SRTP.", error_desc); |
| return false; |
| } |
| return true; |
| } |
| |
| bool BaseChannel::SetRtcpMux_n(bool enable, |
| SdpType type, |
| ContentSource src, |
| std::string* error_desc) { |
| // Provide a more specific error message for the RTCP mux "require" policy |
| // case. |
| if (rtcp_mux_required_ && !enable) { |
| SafeSetError( |
| "rtcpMuxPolicy is 'require', but media description does not " |
| "contain 'a=rtcp-mux'.", |
| error_desc); |
| return false; |
| } |
| bool ret = false; |
| switch (type) { |
| case SdpType::kOffer: |
| ret = rtcp_mux_filter_.SetOffer(enable, src); |
| break; |
| case SdpType::kPrAnswer: |
| // This may activate RTCP muxing, but we don't yet destroy the transport |
| // because the final answer may deactivate it. |
| ret = rtcp_mux_filter_.SetProvisionalAnswer(enable, src); |
| break; |
| case SdpType::kAnswer: |
| ret = rtcp_mux_filter_.SetAnswer(enable, src); |
| if (ret && rtcp_mux_filter_.IsActive()) { |
| ActivateRtcpMux(); |
| } |
| break; |
| default: |
| break; |
| } |
| if (!ret) { |
| SafeSetError("Failed to setup RTCP mux filter.", error_desc); |
| return false; |
| } |
| rtp_transport_->SetRtcpMuxEnabled(rtcp_mux_filter_.IsActive()); |
| // |rtcp_mux_filter_| can be active if |action| is SdpType::kPrAnswer or |
| // SdpType::kAnswer, but we only want to tear down the RTCP transport if we |
| // received a final answer. |
| if (rtcp_mux_filter_.IsActive()) { |
| // If the RTP transport is already writable, then so are we. |
| if (rtp_transport_->rtp_packet_transport()->writable()) { |
| ChannelWritable_n(); |
| } |
| } |
| |
| return true; |
| } |
| |
| bool BaseChannel::AddRecvStream_w(const StreamParams& sp) { |
| RTC_DCHECK(worker_thread() == rtc::Thread::Current()); |
| return media_channel()->AddRecvStream(sp); |
| } |
| |
| bool BaseChannel::RemoveRecvStream_w(uint32_t ssrc) { |
| RTC_DCHECK(worker_thread() == rtc::Thread::Current()); |
| return media_channel()->RemoveRecvStream(ssrc); |
| } |
| |
| bool BaseChannel::UpdateLocalStreams_w(const std::vector<StreamParams>& streams, |
| SdpType type, |
| std::string* error_desc) { |
| // Check for streams that have been removed. |
| bool ret = true; |
| for (StreamParamsVec::const_iterator it = local_streams_.begin(); |
| it != local_streams_.end(); ++it) { |
| if (!GetStreamBySsrc(streams, it->first_ssrc())) { |
| if (!media_channel()->RemoveSendStream(it->first_ssrc())) { |
| std::ostringstream desc; |
| desc << "Failed to remove send stream with ssrc " |
| << it->first_ssrc() << "."; |
| SafeSetError(desc.str(), error_desc); |
| ret = false; |
| } |
| } |
| } |
| // Check for new streams. |
| for (StreamParamsVec::const_iterator it = streams.begin(); |
| it != streams.end(); ++it) { |
| if (!GetStreamBySsrc(local_streams_, it->first_ssrc())) { |
| if (media_channel()->AddSendStream(*it)) { |
| RTC_LOG(LS_INFO) << "Add send stream ssrc: " << it->ssrcs[0]; |
| } else { |
| std::ostringstream desc; |
| desc << "Failed to add send stream ssrc: " << it->first_ssrc(); |
| SafeSetError(desc.str(), error_desc); |
| ret = false; |
| } |
| } |
| } |
| local_streams_ = streams; |
| return ret; |
| } |
| |
| bool BaseChannel::UpdateRemoteStreams_w( |
| const std::vector<StreamParams>& streams, |
| SdpType type, |
| std::string* error_desc) { |
| // Check for streams that have been removed. |
| bool ret = true; |
| for (StreamParamsVec::const_iterator it = remote_streams_.begin(); |
| it != remote_streams_.end(); ++it) { |
| if (!GetStreamBySsrc(streams, it->first_ssrc())) { |
| if (!RemoveRecvStream_w(it->first_ssrc())) { |
| std::ostringstream desc; |
| desc << "Failed to remove remote stream with ssrc " |
| << it->first_ssrc() << "."; |
| SafeSetError(desc.str(), error_desc); |
| ret = false; |
| } |
| } |
| } |
| // Check for new streams. |
| for (StreamParamsVec::const_iterator it = streams.begin(); |
| it != streams.end(); ++it) { |
| if (!GetStreamBySsrc(remote_streams_, it->first_ssrc())) { |
| if (AddRecvStream_w(*it)) { |
| RTC_LOG(LS_INFO) << "Add remote ssrc: " << it->ssrcs[0]; |
| } else { |
| std::ostringstream desc; |
| desc << "Failed to add remote stream ssrc: " << it->first_ssrc(); |
| SafeSetError(desc.str(), error_desc); |
| ret = false; |
| } |
| } |
| } |
| remote_streams_ = streams; |
| return ret; |
| } |
| |
| RtpHeaderExtensions BaseChannel::GetFilteredRtpHeaderExtensions( |
| const RtpHeaderExtensions& extensions) { |
| if (!rtp_dtls_transport_ || |
| !rtp_dtls_transport_->crypto_options() |
| .enable_encrypted_rtp_header_extensions) { |
| RtpHeaderExtensions filtered; |
| auto pred = [](const webrtc::RtpExtension& extension) { |
| return !extension.encrypt; |
| }; |
| std::copy_if(extensions.begin(), extensions.end(), |
| std::back_inserter(filtered), pred); |
| return filtered; |
| } |
| |
| return webrtc::RtpExtension::FilterDuplicateNonEncrypted(extensions); |
| } |
| |
| void BaseChannel::MaybeCacheRtpAbsSendTimeHeaderExtension_w( |
| const std::vector<webrtc::RtpExtension>& extensions) { |
| // Absolute Send Time extension id is used only with external auth, |
| // so do not bother searching for it and making asyncronious call to set |
| // something that is not used. |
| #if defined(ENABLE_EXTERNAL_AUTH) |
| const webrtc::RtpExtension* send_time_extension = |
| webrtc::RtpExtension::FindHeaderExtensionByUri( |
| extensions, webrtc::RtpExtension::kAbsSendTimeUri); |
| int rtp_abs_sendtime_extn_id = |
| send_time_extension ? send_time_extension->id : -1; |
| invoker_.AsyncInvoke<void>( |
| RTC_FROM_HERE, network_thread_, |
| Bind(&BaseChannel::CacheRtpAbsSendTimeHeaderExtension_n, this, |
| rtp_abs_sendtime_extn_id)); |
| #endif |
| } |
| |
| void BaseChannel::CacheRtpAbsSendTimeHeaderExtension_n( |
| int rtp_abs_sendtime_extn_id) { |
| if (sdes_transport_) { |
| sdes_transport_->CacheRtpAbsSendTimeHeaderExtension( |
| rtp_abs_sendtime_extn_id); |
| } else if (dtls_srtp_transport_) { |
| dtls_srtp_transport_->CacheRtpAbsSendTimeHeaderExtension( |
| rtp_abs_sendtime_extn_id); |
| } else { |
| RTC_LOG(LS_WARNING) |
| << "Trying to cache the Absolute Send Time extension id " |
| "but the SRTP is not active."; |
| } |
| } |
| |
| void BaseChannel::OnMessage(rtc::Message *pmsg) { |
| TRACE_EVENT0("webrtc", "BaseChannel::OnMessage"); |
| switch (pmsg->message_id) { |
| case MSG_SEND_RTP_PACKET: |
| case MSG_SEND_RTCP_PACKET: { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| SendPacketMessageData* data = |
| static_cast<SendPacketMessageData*>(pmsg->pdata); |
| bool rtcp = pmsg->message_id == MSG_SEND_RTCP_PACKET; |
| SendPacket(rtcp, &data->packet, data->options); |
| delete data; |
| break; |
| } |
| case MSG_FIRSTPACKETRECEIVED: { |
| SignalFirstPacketReceived(this); |
| break; |
| } |
| } |
| } |
| |
| void BaseChannel::AddHandledPayloadType(int payload_type) { |
| rtp_transport_->AddHandledPayloadType(payload_type); |
| } |
| |
| void BaseChannel::FlushRtcpMessages_n() { |
| // Flush all remaining RTCP messages. This should only be called in |
| // destructor. |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| rtc::MessageList rtcp_messages; |
| network_thread_->Clear(this, MSG_SEND_RTCP_PACKET, &rtcp_messages); |
| for (const auto& message : rtcp_messages) { |
| network_thread_->Send(RTC_FROM_HERE, this, MSG_SEND_RTCP_PACKET, |
| message.pdata); |
| } |
| } |
| |
| void BaseChannel::SignalSentPacket_n(const rtc::SentPacket& sent_packet) { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| invoker_.AsyncInvoke<void>( |
| RTC_FROM_HERE, worker_thread_, |
| rtc::Bind(&BaseChannel::SignalSentPacket_w, this, sent_packet)); |
| } |
| |
| void BaseChannel::SignalSentPacket_w(const rtc::SentPacket& sent_packet) { |
| RTC_DCHECK(worker_thread_->IsCurrent()); |
| SignalSentPacket(sent_packet); |
| } |
| |
| void BaseChannel::UpdateEncryptedHeaderExtensionIds( |
| cricket::ContentSource source, |
| const std::vector<int>& extension_ids) { |
| if (source == ContentSource::CS_LOCAL) { |
| cached_recv_extension_ids_ = std::move(extension_ids); |
| if (dtls_srtp_transport_) { |
| dtls_srtp_transport_->UpdateRecvEncryptedHeaderExtensionIds( |
| extension_ids); |
| } |
| } else { |
| cached_send_extension_ids_ = std::move(extension_ids); |
| if (dtls_srtp_transport_) { |
| dtls_srtp_transport_->UpdateSendEncryptedHeaderExtensionIds( |
| extension_ids); |
| } |
| } |
| } |
| |
| void BaseChannel::ActivateRtcpMux() { |
| // We permanently activated RTCP muxing; signal that we no longer need |
| // the RTCP transport. |
| std::string debug_name = |
| transport_name_.empty() |
| ? rtp_transport_->rtp_packet_transport()->transport_name() |
| : transport_name_; |
| RTC_LOG(LS_INFO) << "Enabling rtcp-mux for " << content_name() |
| << "; no longer need RTCP transport for " << debug_name; |
| if (rtp_transport_->rtcp_packet_transport()) { |
| SetTransport_n(/*rtcp=*/true, nullptr, nullptr); |
| if (dtls_srtp_transport_) { |
| RTC_DCHECK(rtp_dtls_transport_); |
| dtls_srtp_transport_->SetDtlsTransports(rtp_dtls_transport_, |
| /*rtcp_dtls_transport_=*/nullptr); |
| } else { |
| rtp_transport_->SetRtcpPacketTransport(nullptr); |
| } |
| SignalRtcpMuxFullyActive(transport_name_); |
| } |
| UpdateWritableState_n(); |
| } |
| |
| VoiceChannel::VoiceChannel(rtc::Thread* worker_thread, |
| rtc::Thread* network_thread, |
| rtc::Thread* signaling_thread, |
| // TODO(nisse): Delete unused argument. |
| MediaEngineInterface* /* media_engine */, |
| std::unique_ptr<VoiceMediaChannel> media_channel, |
| const std::string& content_name, |
| bool rtcp_mux_required, |
| bool srtp_required) |
| : BaseChannel(worker_thread, |
| network_thread, |
| signaling_thread, |
| std::move(media_channel), |
| content_name, |
| rtcp_mux_required, |
| srtp_required) {} |
| |
| VoiceChannel::~VoiceChannel() { |
| TRACE_EVENT0("webrtc", "VoiceChannel::~VoiceChannel"); |
| // this can't be done in the base class, since it calls a virtual |
| DisableMedia_w(); |
| Deinit(); |
| } |
| |
| void BaseChannel::UpdateMediaSendRecvState() { |
| RTC_DCHECK(network_thread_->IsCurrent()); |
| invoker_.AsyncInvoke<void>( |
| RTC_FROM_HERE, worker_thread_, |
| Bind(&BaseChannel::UpdateMediaSendRecvState_w, this)); |
| } |
| |
| void VoiceChannel::UpdateMediaSendRecvState_w() { |
| // Render incoming data if we're the active call, and we have the local |
| // content. We receive data on the default channel and multiplexed streams. |
| bool recv = IsReadyToReceiveMedia_w(); |
| media_channel()->SetPlayout(recv); |
| |
| // Send outgoing data if we're the active call, we have the remote content, |
| // and we have had some form of connectivity. |
| bool send = IsReadyToSendMedia_w(); |
| media_channel()->SetSend(send); |
| |
| RTC_LOG(LS_INFO) << "Changing voice state, recv=" << recv << " send=" << send; |
| } |
| |
| bool VoiceChannel::SetLocalContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "VoiceChannel::SetLocalContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting local voice description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find audio content in local description.", error_desc); |
| return false; |
| } |
| |
| const AudioContentDescription* audio = content->as_audio(); |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(audio->rtp_header_extensions()); |
| |
| if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions, |
| error_desc)) { |
| return false; |
| } |
| |
| AudioRecvParameters recv_params = last_recv_params_; |
| RtpParametersFromMediaDescription(audio, rtp_header_extensions, &recv_params); |
| if (!media_channel()->SetRecvParameters(recv_params)) { |
| SafeSetError("Failed to set local audio description recv parameters.", |
| error_desc); |
| return false; |
| } |
| for (const AudioCodec& codec : audio->codecs()) { |
| AddHandledPayloadType(codec.id); |
| } |
| last_recv_params_ = recv_params; |
| |
| // TODO(pthatcher): Move local streams into AudioSendParameters, and |
| // only give it to the media channel once we have a remote |
| // description too (without a remote description, we won't be able |
| // to send them anyway). |
| if (!UpdateLocalStreams_w(audio->streams(), type, error_desc)) { |
| SafeSetError("Failed to set local audio description streams.", error_desc); |
| return false; |
| } |
| |
| set_local_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| bool VoiceChannel::SetRemoteContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "VoiceChannel::SetRemoteContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting remote voice description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find audio content in remote description.", error_desc); |
| return false; |
| } |
| |
| const AudioContentDescription* audio = content->as_audio(); |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(audio->rtp_header_extensions()); |
| |
| if (!SetRtpTransportParameters(content, type, CS_REMOTE, |
| rtp_header_extensions, error_desc)) { |
| return false; |
| } |
| |
| AudioSendParameters send_params = last_send_params_; |
| RtpSendParametersFromMediaDescription(audio, rtp_header_extensions, |
| &send_params); |
| send_params.mid = content_name(); |
| |
| bool parameters_applied = media_channel()->SetSendParameters(send_params); |
| if (!parameters_applied) { |
| SafeSetError("Failed to set remote audio description send parameters.", |
| error_desc); |
| return false; |
| } |
| last_send_params_ = send_params; |
| |
| // TODO(pthatcher): Move remote streams into AudioRecvParameters, |
| // and only give it to the media channel once we have a local |
| // description too (without a local description, we won't be able to |
| // recv them anyway). |
| if (!UpdateRemoteStreams_w(audio->streams(), type, error_desc)) { |
| SafeSetError("Failed to set remote audio description streams.", error_desc); |
| return false; |
| } |
| |
| if (audio->rtp_header_extensions_set()) { |
| MaybeCacheRtpAbsSendTimeHeaderExtension_w(rtp_header_extensions); |
| } |
| |
| set_remote_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| VideoChannel::VideoChannel(rtc::Thread* worker_thread, |
| rtc::Thread* network_thread, |
| rtc::Thread* signaling_thread, |
| std::unique_ptr<VideoMediaChannel> media_channel, |
| const std::string& content_name, |
| bool rtcp_mux_required, |
| bool srtp_required) |
| : BaseChannel(worker_thread, |
| network_thread, |
| signaling_thread, |
| std::move(media_channel), |
| content_name, |
| rtcp_mux_required, |
| srtp_required) {} |
| |
| VideoChannel::~VideoChannel() { |
| TRACE_EVENT0("webrtc", "VideoChannel::~VideoChannel"); |
| // this can't be done in the base class, since it calls a virtual |
| DisableMedia_w(); |
| |
| Deinit(); |
| } |
| |
| void VideoChannel::UpdateMediaSendRecvState_w() { |
| // Send outgoing data if we're the active call, we have the remote content, |
| // and we have had some form of connectivity. |
| bool send = IsReadyToSendMedia_w(); |
| if (!media_channel()->SetSend(send)) { |
| RTC_LOG(LS_ERROR) << "Failed to SetSend on video channel"; |
| // TODO(gangji): Report error back to server. |
| } |
| |
| RTC_LOG(LS_INFO) << "Changing video state, send=" << send; |
| } |
| |
| void VideoChannel::FillBitrateInfo(BandwidthEstimationInfo* bwe_info) { |
| InvokeOnWorker<void>(RTC_FROM_HERE, Bind(&VideoMediaChannel::FillBitrateInfo, |
| media_channel(), bwe_info)); |
| } |
| |
| bool VideoChannel::SetLocalContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "VideoChannel::SetLocalContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting local video description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find video content in local description.", error_desc); |
| return false; |
| } |
| |
| const VideoContentDescription* video = content->as_video(); |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(video->rtp_header_extensions()); |
| |
| if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions, |
| error_desc)) { |
| return false; |
| } |
| |
| VideoRecvParameters recv_params = last_recv_params_; |
| RtpParametersFromMediaDescription(video, rtp_header_extensions, &recv_params); |
| if (!media_channel()->SetRecvParameters(recv_params)) { |
| SafeSetError("Failed to set local video description recv parameters.", |
| error_desc); |
| return false; |
| } |
| for (const VideoCodec& codec : video->codecs()) { |
| AddHandledPayloadType(codec.id); |
| } |
| last_recv_params_ = recv_params; |
| |
| // TODO(pthatcher): Move local streams into VideoSendParameters, and |
| // only give it to the media channel once we have a remote |
| // description too (without a remote description, we won't be able |
| // to send them anyway). |
| if (!UpdateLocalStreams_w(video->streams(), type, error_desc)) { |
| SafeSetError("Failed to set local video description streams.", error_desc); |
| return false; |
| } |
| |
| set_local_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| bool VideoChannel::SetRemoteContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "VideoChannel::SetRemoteContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting remote video description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find video content in remote description.", error_desc); |
| return false; |
| } |
| |
| const VideoContentDescription* video = content->as_video(); |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(video->rtp_header_extensions()); |
| |
| if (!SetRtpTransportParameters(content, type, CS_REMOTE, |
| rtp_header_extensions, error_desc)) { |
| return false; |
| } |
| |
| VideoSendParameters send_params = last_send_params_; |
| RtpSendParametersFromMediaDescription(video, rtp_header_extensions, |
| &send_params); |
| if (video->conference_mode()) { |
| send_params.conference_mode = true; |
| } |
| send_params.mid = content_name(); |
| |
| bool parameters_applied = media_channel()->SetSendParameters(send_params); |
| |
| if (!parameters_applied) { |
| SafeSetError("Failed to set remote video description send parameters.", |
| error_desc); |
| return false; |
| } |
| last_send_params_ = send_params; |
| |
| // TODO(pthatcher): Move remote streams into VideoRecvParameters, |
| // and only give it to the media channel once we have a local |
| // description too (without a local description, we won't be able to |
| // recv them anyway). |
| if (!UpdateRemoteStreams_w(video->streams(), type, error_desc)) { |
| SafeSetError("Failed to set remote video description streams.", error_desc); |
| return false; |
| } |
| |
| if (video->rtp_header_extensions_set()) { |
| MaybeCacheRtpAbsSendTimeHeaderExtension_w(rtp_header_extensions); |
| } |
| |
| set_remote_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| RtpDataChannel::RtpDataChannel(rtc::Thread* worker_thread, |
| rtc::Thread* network_thread, |
| rtc::Thread* signaling_thread, |
| std::unique_ptr<DataMediaChannel> media_channel, |
| const std::string& content_name, |
| bool rtcp_mux_required, |
| bool srtp_required) |
| : BaseChannel(worker_thread, |
| network_thread, |
| signaling_thread, |
| std::move(media_channel), |
| content_name, |
| rtcp_mux_required, |
| srtp_required) {} |
| |
| RtpDataChannel::~RtpDataChannel() { |
| TRACE_EVENT0("webrtc", "RtpDataChannel::~RtpDataChannel"); |
| // this can't be done in the base class, since it calls a virtual |
| DisableMedia_w(); |
| |
| Deinit(); |
| } |
| |
| void RtpDataChannel::Init_w( |
| DtlsTransportInternal* rtp_dtls_transport, |
| DtlsTransportInternal* rtcp_dtls_transport, |
| rtc::PacketTransportInternal* rtp_packet_transport, |
| rtc::PacketTransportInternal* rtcp_packet_transport) { |
| BaseChannel::Init_w(rtp_dtls_transport, rtcp_dtls_transport, |
| rtp_packet_transport, rtcp_packet_transport); |
| |
| media_channel()->SignalDataReceived.connect(this, |
| &RtpDataChannel::OnDataReceived); |
| media_channel()->SignalReadyToSend.connect( |
| this, &RtpDataChannel::OnDataChannelReadyToSend); |
| } |
| |
| void RtpDataChannel::Init_w(webrtc::RtpTransportInternal* rtp_transport) { |
| BaseChannel::Init_w(rtp_transport); |
| media_channel()->SignalDataReceived.connect(this, |
| &RtpDataChannel::OnDataReceived); |
| media_channel()->SignalReadyToSend.connect( |
| this, &RtpDataChannel::OnDataChannelReadyToSend); |
| } |
| |
| bool RtpDataChannel::SendData(const SendDataParams& params, |
| const rtc::CopyOnWriteBuffer& payload, |
| SendDataResult* result) { |
| return InvokeOnWorker<bool>( |
| RTC_FROM_HERE, Bind(&DataMediaChannel::SendData, media_channel(), params, |
| payload, result)); |
| } |
| |
| bool RtpDataChannel::CheckDataChannelTypeFromContent( |
| const DataContentDescription* content, |
| std::string* error_desc) { |
| bool is_sctp = ((content->protocol() == kMediaProtocolSctp) || |
| (content->protocol() == kMediaProtocolDtlsSctp)); |
| // It's been set before, but doesn't match. That's bad. |
| if (is_sctp) { |
| SafeSetError("Data channel type mismatch. Expected RTP, got SCTP.", |
| error_desc); |
| return false; |
| } |
| return true; |
| } |
| |
| bool RtpDataChannel::SetLocalContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "RtpDataChannel::SetLocalContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting local data description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find data content in local description.", error_desc); |
| return false; |
| } |
| |
| const DataContentDescription* data = content->as_data(); |
| |
| if (!CheckDataChannelTypeFromContent(data, error_desc)) { |
| return false; |
| } |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(data->rtp_header_extensions()); |
| |
| if (!SetRtpTransportParameters(content, type, CS_LOCAL, rtp_header_extensions, |
| error_desc)) { |
| return false; |
| } |
| |
| DataRecvParameters recv_params = last_recv_params_; |
| RtpParametersFromMediaDescription(data, rtp_header_extensions, &recv_params); |
| if (!media_channel()->SetRecvParameters(recv_params)) { |
| SafeSetError("Failed to set remote data description recv parameters.", |
| error_desc); |
| return false; |
| } |
| for (const DataCodec& codec : data->codecs()) { |
| AddHandledPayloadType(codec.id); |
| } |
| last_recv_params_ = recv_params; |
| |
| // TODO(pthatcher): Move local streams into DataSendParameters, and |
| // only give it to the media channel once we have a remote |
| // description too (without a remote description, we won't be able |
| // to send them anyway). |
| if (!UpdateLocalStreams_w(data->streams(), type, error_desc)) { |
| SafeSetError("Failed to set local data description streams.", error_desc); |
| return false; |
| } |
| |
| set_local_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| bool RtpDataChannel::SetRemoteContent_w(const MediaContentDescription* content, |
| SdpType type, |
| std::string* error_desc) { |
| TRACE_EVENT0("webrtc", "RtpDataChannel::SetRemoteContent_w"); |
| RTC_DCHECK_RUN_ON(worker_thread()); |
| RTC_LOG(LS_INFO) << "Setting remote data description"; |
| |
| RTC_DCHECK(content); |
| if (!content) { |
| SafeSetError("Can't find data content in remote description.", error_desc); |
| return false; |
| } |
| |
| const DataContentDescription* data = content->as_data(); |
| |
| // If the remote data doesn't have codecs, it must be empty, so ignore it. |
| if (!data->has_codecs()) { |
| return true; |
| } |
| |
| if (!CheckDataChannelTypeFromContent(data, error_desc)) { |
| return false; |
| } |
| |
| RtpHeaderExtensions rtp_header_extensions = |
| GetFilteredRtpHeaderExtensions(data->rtp_header_extensions()); |
| |
| RTC_LOG(LS_INFO) << "Setting remote data description"; |
| if (!SetRtpTransportParameters(content, type, CS_REMOTE, |
| rtp_header_extensions, error_desc)) { |
| return false; |
| } |
| |
| DataSendParameters send_params = last_send_params_; |
| RtpSendParametersFromMediaDescription<DataCodec>(data, rtp_header_extensions, |
| &send_params); |
| if (!media_channel()->SetSendParameters(send_params)) { |
| SafeSetError("Failed to set remote data description send parameters.", |
| error_desc); |
| return false; |
| } |
| last_send_params_ = send_params; |
| |
| // TODO(pthatcher): Move remote streams into DataRecvParameters, |
| // and only give it to the media channel once we have a local |
| // description too (without a local description, we won't be able to |
| // recv them anyway). |
| if (!UpdateRemoteStreams_w(data->streams(), type, error_desc)) { |
| SafeSetError("Failed to set remote data description streams.", |
| error_desc); |
| return false; |
| } |
| |
| set_remote_content_direction(content->direction()); |
| UpdateMediaSendRecvState_w(); |
| return true; |
| } |
| |
| void RtpDataChannel::UpdateMediaSendRecvState_w() { |
| // Render incoming data if we're the active call, and we have the local |
| // content. We receive data on the default channel and multiplexed streams. |
| bool recv = IsReadyToReceiveMedia_w(); |
| if (!media_channel()->SetReceive(recv)) { |
| RTC_LOG(LS_ERROR) << "Failed to SetReceive on data channel"; |
| } |
| |
| // Send outgoing data if we're the active call, we have the remote content, |
| // and we have had some form of connectivity. |
| bool send = IsReadyToSendMedia_w(); |
| if (!media_channel()->SetSend(send)) { |
| RTC_LOG(LS_ERROR) << "Failed to SetSend on data channel"; |
| } |
| |
| // Trigger SignalReadyToSendData asynchronously. |
| OnDataChannelReadyToSend(send); |
| |
| RTC_LOG(LS_INFO) << "Changing data state, recv=" << recv << " send=" << send; |
| } |
| |
| void RtpDataChannel::OnMessage(rtc::Message* pmsg) { |
| switch (pmsg->message_id) { |
| case MSG_READYTOSENDDATA: { |
| DataChannelReadyToSendMessageData* data = |
| static_cast<DataChannelReadyToSendMessageData*>(pmsg->pdata); |
| ready_to_send_data_ = data->data(); |
| SignalReadyToSendData(ready_to_send_data_); |
| delete data; |
| break; |
| } |
| case MSG_DATARECEIVED: { |
| DataReceivedMessageData* data = |
| static_cast<DataReceivedMessageData*>(pmsg->pdata); |
| SignalDataReceived(data->params, data->payload); |
| delete data; |
| break; |
| } |
| default: |
| BaseChannel::OnMessage(pmsg); |
| break; |
| } |
| } |
| |
| void RtpDataChannel::OnDataReceived(const ReceiveDataParams& params, |
| const char* data, |
| size_t len) { |
| DataReceivedMessageData* msg = new DataReceivedMessageData( |
| params, data, len); |
| signaling_thread()->Post(RTC_FROM_HERE, this, MSG_DATARECEIVED, msg); |
| } |
| |
| void RtpDataChannel::OnDataChannelReadyToSend(bool writable) { |
| // This is usded for congestion control to indicate that the stream is ready |
| // to send by the MediaChannel, as opposed to OnReadyToSend, which indicates |
| // that the transport channel is ready. |
| signaling_thread()->Post(RTC_FROM_HERE, this, MSG_READYTOSENDDATA, |
| new DataChannelReadyToSendMessageData(writable)); |
| } |
| |
| } // namespace cricket |
