| /* |
| * Copyright 2018 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 "pc/datagram_dtls_adaptor.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <utility> |
| |
| #include "absl/memory/memory.h" |
| #include "absl/strings/string_view.h" |
| #include "absl/types/optional.h" |
| #include "api/rtc_error.h" |
| #include "api/rtc_event_log/rtc_event_log.h" |
| #include "logging/rtc_event_log/events/rtc_event_dtls_transport_state.h" |
| #include "logging/rtc_event_log/events/rtc_event_dtls_writable_state.h" |
| #include "modules/rtp_rtcp/include/rtp_header_parser.h" |
| #include "modules/rtp_rtcp/source/rtcp_packet/transport_feedback.h" |
| #include "modules/rtp_rtcp/source/rtp_packet.h" |
| #include "p2p/base/dtls_transport_internal.h" |
| #include "p2p/base/packet_transport_internal.h" |
| #include "rtc_base/buffer.h" |
| #include "rtc_base/checks.h" |
| #include "rtc_base/dscp.h" |
| #include "rtc_base/logging.h" |
| #include "rtc_base/message_queue.h" |
| #include "rtc_base/rtc_certificate.h" |
| #include "rtc_base/ssl_stream_adapter.h" |
| #include "rtc_base/stream.h" |
| #include "rtc_base/thread.h" |
| #include "system_wrappers/include/field_trial.h" |
| |
| #ifdef BYPASS_DATAGRAM_DTLS_TEST_ONLY |
| // Send unencrypted packets directly to ICE, bypassing datagtram |
| // transport. Use in tests only. |
| constexpr bool kBypassDatagramDtlsTestOnly = true; |
| #else |
| constexpr bool kBypassDatagramDtlsTestOnly = false; |
| #endif |
| |
| namespace cricket { |
| |
| namespace { |
| |
| // Field trials. |
| // Disable datagram to RTCP feedback translation and enable RTCP feedback loop |
| // on top of datagram feedback loop. Note that two |
| // feedback loops add unneccesary overhead, so it's preferable to use feedback |
| // loop provided by datagram transport and convert datagram ACKs to RTCP ACKs, |
| // but enabling RTCP feedback loop may be useful in tests and experiments. |
| const char kDisableDatagramToRtcpFeebackTranslationFieldTrial[] = |
| "WebRTC-kDisableDatagramToRtcpFeebackTranslation"; |
| |
| } // namespace |
| |
| // Maximum packet size of RTCP feedback packet for allocation. We re-create RTCP |
| // feedback packets when we get ACK notifications from datagram transport. Our |
| // rtcp feedback packets contain only 1 ACK, so they are much smaller than 1250. |
| constexpr size_t kMaxRtcpFeedbackPacketSize = 1250; |
| |
| DatagramDtlsAdaptor::DatagramDtlsAdaptor( |
| const std::vector<webrtc::RtpExtension>& rtp_header_extensions, |
| IceTransportInternal* ice_transport, |
| webrtc::DatagramTransportInterface* datagram_transport, |
| const webrtc::CryptoOptions& crypto_options, |
| webrtc::RtcEventLog* event_log) |
| : crypto_options_(crypto_options), |
| ice_transport_(ice_transport), |
| datagram_transport_(datagram_transport), |
| event_log_(event_log), |
| disable_datagram_to_rtcp_feeback_translation_( |
| webrtc::field_trial::IsEnabled( |
| kDisableDatagramToRtcpFeebackTranslationFieldTrial)) { |
| // Save extension map for parsing RTP packets (we only need transport |
| // sequence numbers). |
| const webrtc::RtpExtension* transport_sequence_number_extension = |
| webrtc::RtpExtension::FindHeaderExtensionByUri( |
| rtp_header_extensions, webrtc::TransportSequenceNumber::kUri); |
| |
| if (transport_sequence_number_extension != nullptr) { |
| rtp_header_extension_map_.Register<webrtc::TransportSequenceNumber>( |
| transport_sequence_number_extension->id); |
| } else { |
| RTC_LOG(LS_ERROR) << "Transport sequence numbers are not supported in " |
| "datagram transport connection"; |
| } |
| |
| // TODO(sukhanov): Add CHECK to make sure that field trial |
| // WebRTC-ExcludeTransportSequenceNumberFromFecFieldTrial is enabled. |
| // If feedback loop is translation is enabled, FEC packets must exclude |
| // transport sequence numbers, otherwise recovered packets will be corrupt. |
| |
| RTC_DCHECK(ice_transport_); |
| RTC_DCHECK(datagram_transport_); |
| ConnectToIceTransport(); |
| } |
| |
| void DatagramDtlsAdaptor::ConnectToIceTransport() { |
| ice_transport_->SignalWritableState.connect( |
| this, &DatagramDtlsAdaptor::OnWritableState); |
| ice_transport_->SignalReadyToSend.connect( |
| this, &DatagramDtlsAdaptor::OnReadyToSend); |
| ice_transport_->SignalReceivingState.connect( |
| this, &DatagramDtlsAdaptor::OnReceivingState); |
| // Datagram transport does not propagate network route change. |
| ice_transport_->SignalNetworkRouteChanged.connect( |
| this, &DatagramDtlsAdaptor::OnNetworkRouteChanged); |
| if (kBypassDatagramDtlsTestOnly) { |
| // In bypass mode we have to subscribe to ICE read and sent events. |
| // Test only case to use ICE directly instead of data transport. |
| ice_transport_->SignalReadPacket.connect( |
| this, &DatagramDtlsAdaptor::OnReadPacket); |
| ice_transport_->SignalSentPacket.connect( |
| this, &DatagramDtlsAdaptor::OnSentPacket); |
| } else { |
| // Subscribe to Data Transport read packets. |
| datagram_transport_->SetDatagramSink(this); |
| datagram_transport_->SetTransportStateCallback(this); |
| } |
| } |
| |
| DatagramDtlsAdaptor::~DatagramDtlsAdaptor() { |
| // Unsubscribe from Datagram Transport dinks. |
| datagram_transport_->SetDatagramSink(nullptr); |
| datagram_transport_->SetTransportStateCallback(nullptr); |
| } |
| |
| const webrtc::CryptoOptions& DatagramDtlsAdaptor::crypto_options() const { |
| return crypto_options_; |
| } |
| |
| int DatagramDtlsAdaptor::SendPacket(const char* data, |
| size_t len, |
| const rtc::PacketOptions& options, |
| int flags) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| |
| // TODO(sukhanov): Handle options and flags. |
| if (kBypassDatagramDtlsTestOnly) { |
| // In bypass mode sent directly to ICE. |
| return ice_transport_->SendPacket(data, len, options); |
| } |
| |
| // Assign and increment datagram_id. |
| const webrtc::DatagramId datagram_id = current_datagram_id_++; |
| |
| rtc::ArrayView<const uint8_t> original_data( |
| reinterpret_cast<const uint8_t*>(data), len); |
| |
| // Send as is (without extracting transport sequence number) for |
| // - All RTCP packets, because they do not have transport sequence number. |
| // - RTP packets if we are not doing datagram => RTCP feedback translation. |
| if (disable_datagram_to_rtcp_feeback_translation_ || |
| webrtc::RtpHeaderParser::IsRtcp(original_data.data(), |
| original_data.size())) { |
| // Even if we are not extracting transport sequence number we need to |
| // propagate "Sent" notification for both RTP and RTCP packets. For this |
| // reason we need save options.packet_id in packet map. |
| sent_rtp_packet_map_[datagram_id] = SentPacketInfo(options.packet_id); |
| |
| return SendDatagram(original_data, datagram_id); |
| } |
| |
| // Parse RTP packet. |
| webrtc::RtpPacket rtp_packet(&rtp_header_extension_map_); |
| if (!rtp_packet.Parse(original_data)) { |
| RTC_NOTREACHED() << "Failed to parse outgoing RtpPacket, len=" << len |
| << ", options.packet_id=" << options.packet_id; |
| return -1; |
| } |
| |
| // Try to get transport sequence number. |
| uint16_t transport_senquence_number; |
| if (!rtp_packet.GetExtension<webrtc::TransportSequenceNumber>( |
| &transport_senquence_number)) { |
| // Save packet info without transport sequence number. |
| sent_rtp_packet_map_[datagram_id] = SentPacketInfo(options.packet_id); |
| |
| RTC_LOG(LS_VERBOSE) |
| << "Sending rtp packet without transport sequence number, packet=" |
| << rtp_packet.ToString(); |
| |
| return SendDatagram(original_data, datagram_id); |
| } |
| |
| // Save packet info with sequence number and ssrc so we could reconstruct |
| // RTCP feedback packet when we receive datagram ACK. |
| sent_rtp_packet_map_[datagram_id] = SentPacketInfo( |
| options.packet_id, rtp_packet.Ssrc(), transport_senquence_number); |
| |
| // Since datagram transport provides feedback and timestamps, we do not need |
| // to send transport sequence number, so we remove it from RTP packet. Later |
| // when we get Ack for sent datagram, we will re-create RTCP feedback packet. |
| if (!rtp_packet.RemoveExtension(webrtc::TransportSequenceNumber::kId)) { |
| RTC_NOTREACHED() << "Failed to remove transport sequence number, packet=" |
| << rtp_packet.ToString(); |
| return -1; |
| } |
| |
| RTC_LOG(LS_VERBOSE) << "Removed transport_senquence_number=" |
| << transport_senquence_number |
| << " from packet=" << rtp_packet.ToString() |
| << ", saved bytes=" << len - rtp_packet.size(); |
| |
| return SendDatagram( |
| rtc::ArrayView<const uint8_t>(rtp_packet.data(), rtp_packet.size()), |
| datagram_id); |
| } |
| |
| int DatagramDtlsAdaptor::SendDatagram(rtc::ArrayView<const uint8_t> data, |
| webrtc::DatagramId datagram_id) { |
| webrtc::RTCError error = datagram_transport_->SendDatagram(data, datagram_id); |
| return (error.ok() ? data.size() : -1); |
| } |
| |
| void DatagramDtlsAdaptor::OnReadPacket(rtc::PacketTransportInternal* transport, |
| const char* data, |
| size_t size, |
| const int64_t& packet_time_us, |
| int flags) { |
| // Only used in bypass mode. |
| RTC_DCHECK(kBypassDatagramDtlsTestOnly); |
| |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| RTC_DCHECK_EQ(transport, ice_transport_); |
| RTC_DCHECK(flags == 0); |
| |
| PropagateReadPacket( |
| rtc::MakeArrayView(reinterpret_cast<const uint8_t*>(data), size), |
| packet_time_us); |
| } |
| |
| void DatagramDtlsAdaptor::OnDatagramReceived( |
| rtc::ArrayView<const uint8_t> data) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| RTC_DCHECK(!kBypassDatagramDtlsTestOnly); |
| |
| // TODO(sukhanov): I am not filling out time, but on my video quality |
| // test in WebRTC the time was not set either and higher layers of the stack |
| // overwrite -1 with current current rtc time. Leaveing comment for now to |
| // make sure it works as expected. |
| int64_t packet_time_us = -1; |
| |
| PropagateReadPacket(data, packet_time_us); |
| } |
| |
| void DatagramDtlsAdaptor::OnDatagramSent(webrtc::DatagramId datagram_id) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| |
| // Find packet_id and propagate OnPacketSent notification. |
| const auto& it = sent_rtp_packet_map_.find(datagram_id); |
| if (it == sent_rtp_packet_map_.end()) { |
| RTC_NOTREACHED() << "Did not find sent packet info for sent datagram_id=" |
| << datagram_id; |
| return; |
| } |
| |
| // Also see how DatagramDtlsAdaptor::OnSentPacket handles OnSentPacket |
| // notification from ICE in bypass mode. |
| rtc::SentPacket sent_packet(/*packet_id=*/it->second.packet_id, |
| rtc::TimeMillis()); |
| |
| PropagateOnSentNotification(sent_packet); |
| } |
| |
| bool DatagramDtlsAdaptor::GetAndRemoveSentPacketInfo( |
| webrtc::DatagramId datagram_id, |
| SentPacketInfo* sent_packet_info) { |
| RTC_CHECK(sent_packet_info != nullptr); |
| |
| const auto& it = sent_rtp_packet_map_.find(datagram_id); |
| if (it == sent_rtp_packet_map_.end()) { |
| return false; |
| } |
| |
| *sent_packet_info = it->second; |
| sent_rtp_packet_map_.erase(it); |
| return true; |
| } |
| |
| void DatagramDtlsAdaptor::OnDatagramAcked(const webrtc::DatagramAck& ack) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| |
| SentPacketInfo sent_packet_info; |
| if (!GetAndRemoveSentPacketInfo(ack.datagram_id, &sent_packet_info)) { |
| // TODO(sukhanov): If OnDatagramAck() can come after OnDatagramLost(), |
| // datagram_id is already deleted and we may need to relax the CHECK below. |
| // It's probably OK to ignore such datagrams, because it's been a few RTTs |
| // anyway since they were sent. |
| RTC_NOTREACHED() << "Did not find sent packet info for datagram_id=" |
| << ack.datagram_id; |
| return; |
| } |
| |
| RTC_LOG(LS_VERBOSE) << "Datagram acked, ack.datagram_id=" << ack.datagram_id |
| << ", sent_packet_info.packet_id=" |
| << sent_packet_info.packet_id |
| << ", sent_packet_info.transport_sequence_number=" |
| << sent_packet_info.transport_sequence_number.value_or(-1) |
| << ", sent_packet_info.ssrc=" |
| << sent_packet_info.ssrc.value_or(-1) |
| << ", receive_timestamp_ms=" |
| << ack.receive_timestamp.ms(); |
| |
| // If transport sequence number was not present in RTP packet, we do not need |
| // to propagate RTCP feedback. |
| if (!sent_packet_info.transport_sequence_number) { |
| return; |
| } |
| |
| // TODO(sukhanov): We noticed that datagram transport implementations can |
| // return zero timestamps in the middle of the call. This is workaround to |
| // avoid propagating zero timestamps, but we need to understand why we have |
| // them in the first place. |
| int64_t receive_timestamp_us = ack.receive_timestamp.us(); |
| |
| if (receive_timestamp_us == 0) { |
| receive_timestamp_us = previous_nonzero_timestamp_us_; |
| } else { |
| previous_nonzero_timestamp_us_ = receive_timestamp_us; |
| } |
| |
| // Ssrc must be provided in packet info if transport sequence number is set, |
| // which is guaranteed by SentPacketInfo constructor. |
| RTC_CHECK(sent_packet_info.ssrc); |
| |
| // Recreate RTCP feedback packet. |
| webrtc::rtcp::TransportFeedback feedback_packet; |
| feedback_packet.SetMediaSsrc(*sent_packet_info.ssrc); |
| |
| const uint16_t transport_sequence_number = |
| sent_packet_info.transport_sequence_number.value(); |
| |
| feedback_packet.SetBase(transport_sequence_number, receive_timestamp_us); |
| feedback_packet.AddReceivedPacket(transport_sequence_number, |
| receive_timestamp_us); |
| |
| rtc::Buffer buffer(kMaxRtcpFeedbackPacketSize); |
| size_t index = 0; |
| if (!feedback_packet.Create(buffer.data(), &index, buffer.capacity(), |
| nullptr)) { |
| RTC_NOTREACHED() << "Failed to create RTCP feedback packet"; |
| return; |
| } |
| |
| RTC_CHECK_GT(index, 0); |
| RTC_CHECK_LE(index, kMaxRtcpFeedbackPacketSize); |
| |
| // Propagage created RTCP packet as normal incoming packet. |
| buffer.SetSize(index); |
| PropagateReadPacket(buffer, /*packet_time_us=*/-1); |
| } |
| |
| void DatagramDtlsAdaptor::OnDatagramLost(webrtc::DatagramId datagram_id) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| |
| RTC_LOG(LS_INFO) << "Datagram lost, datagram_id=" << datagram_id; |
| |
| SentPacketInfo sent_packet_info; |
| if (!GetAndRemoveSentPacketInfo(datagram_id, &sent_packet_info)) { |
| RTC_NOTREACHED() << "Did not find sent packet info for lost datagram_id=" |
| << datagram_id; |
| } |
| } |
| |
| void DatagramDtlsAdaptor::OnSentPacket(rtc::PacketTransportInternal* transport, |
| const rtc::SentPacket& sent_packet) { |
| // Only used in bypass mode. |
| RTC_DCHECK(kBypassDatagramDtlsTestOnly); |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| |
| PropagateOnSentNotification(sent_packet); |
| } |
| |
| void DatagramDtlsAdaptor::PropagateOnSentNotification( |
| const rtc::SentPacket& sent_packet) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| SignalSentPacket(this, sent_packet); |
| } |
| |
| void DatagramDtlsAdaptor::PropagateReadPacket( |
| rtc::ArrayView<const uint8_t> data, |
| const int64_t& packet_time_us) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| SignalReadPacket(this, reinterpret_cast<const char*>(data.data()), |
| data.size(), packet_time_us, /*flags=*/0); |
| } |
| |
| int DatagramDtlsAdaptor::component() const { |
| return kDatagramDtlsAdaptorComponent; |
| } |
| bool DatagramDtlsAdaptor::IsDtlsActive() const { |
| return false; |
| } |
| bool DatagramDtlsAdaptor::GetDtlsRole(rtc::SSLRole* role) const { |
| return false; |
| } |
| bool DatagramDtlsAdaptor::SetDtlsRole(rtc::SSLRole role) { |
| return false; |
| } |
| bool DatagramDtlsAdaptor::GetSrtpCryptoSuite(int* cipher) { |
| return false; |
| } |
| bool DatagramDtlsAdaptor::GetSslCipherSuite(int* cipher) { |
| return false; |
| } |
| |
| rtc::scoped_refptr<rtc::RTCCertificate> |
| DatagramDtlsAdaptor::GetLocalCertificate() const { |
| return nullptr; |
| } |
| |
| bool DatagramDtlsAdaptor::SetLocalCertificate( |
| const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) { |
| return false; |
| } |
| |
| std::unique_ptr<rtc::SSLCertChain> DatagramDtlsAdaptor::GetRemoteSSLCertChain() |
| const { |
| return nullptr; |
| } |
| |
| bool DatagramDtlsAdaptor::ExportKeyingMaterial(const std::string& label, |
| const uint8_t* context, |
| size_t context_len, |
| bool use_context, |
| uint8_t* result, |
| size_t result_len) { |
| return false; |
| } |
| |
| bool DatagramDtlsAdaptor::SetRemoteFingerprint(const std::string& digest_alg, |
| const uint8_t* digest, |
| size_t digest_len) { |
| // TODO(sukhanov): We probably should not called with fingerptints in |
| // datagram scenario, but we may need to change code up the stack before |
| // we can return false or DCHECK. |
| return true; |
| } |
| |
| bool DatagramDtlsAdaptor::SetSslMaxProtocolVersion( |
| rtc::SSLProtocolVersion version) { |
| // TODO(sukhanov): We may be able to return false and/or DCHECK that we |
| // are not called if datagram transport is used, but we need to change |
| // integration before we can do it. |
| return true; |
| } |
| |
| IceTransportInternal* DatagramDtlsAdaptor::ice_transport() { |
| return ice_transport_; |
| } |
| |
| // Similar implementaton as in p2p/base/dtls_transport.cc. |
| void DatagramDtlsAdaptor::OnReadyToSend( |
| rtc::PacketTransportInternal* transport) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| if (writable()) { |
| SignalReadyToSend(this); |
| } |
| } |
| |
| void DatagramDtlsAdaptor::OnWritableState( |
| rtc::PacketTransportInternal* transport) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| RTC_DCHECK(transport == ice_transport_); |
| RTC_LOG(LS_VERBOSE) << "ice_transport writable state changed to " |
| << ice_transport_->writable(); |
| |
| if (kBypassDatagramDtlsTestOnly) { |
| // Note: SignalWritableState fired by set_writable. |
| set_writable(ice_transport_->writable()); |
| return; |
| } |
| |
| switch (dtls_state()) { |
| case DTLS_TRANSPORT_NEW: |
| break; |
| case DTLS_TRANSPORT_CONNECTED: |
| // Note: SignalWritableState fired by set_writable. |
| // Do we also need set_receiving(ice_transport_->receiving()) here now, in |
| // case we lose that signal before "DTLS" connects? |
| // DtlsTransport::OnWritableState does not set_receiving in a similar |
| // case, so leaving it out for the time being, but it would be good to |
| // understand why. |
| set_writable(ice_transport_->writable()); |
| break; |
| case DTLS_TRANSPORT_CONNECTING: |
| // Do nothing. |
| break; |
| case DTLS_TRANSPORT_FAILED: |
| case DTLS_TRANSPORT_CLOSED: |
| // Should not happen. Do nothing. |
| break; |
| } |
| } |
| |
| void DatagramDtlsAdaptor::OnStateChanged(webrtc::MediaTransportState state) { |
| // Convert MediaTransportState to DTLS state. |
| switch (state) { |
| case webrtc::MediaTransportState::kPending: |
| set_dtls_state(DTLS_TRANSPORT_CONNECTING); |
| break; |
| |
| case webrtc::MediaTransportState::kWritable: |
| // Since we do not set writable state until datagram transport is |
| // connected, we need to call set_writable first. |
| set_writable(ice_transport_->writable()); |
| set_dtls_state(DTLS_TRANSPORT_CONNECTED); |
| break; |
| |
| case webrtc::MediaTransportState::kClosed: |
| set_dtls_state(DTLS_TRANSPORT_CLOSED); |
| break; |
| } |
| } |
| |
| DtlsTransportState DatagramDtlsAdaptor::dtls_state() const { |
| return dtls_state_; |
| } |
| |
| const std::string& DatagramDtlsAdaptor::transport_name() const { |
| return ice_transport_->transport_name(); |
| } |
| |
| bool DatagramDtlsAdaptor::writable() const { |
| // NOTE that even if ice is writable, writable_ maybe false, because we |
| // propagte writable only after DTLS is connect (this is consistent with |
| // implementation in dtls_transport.cc). |
| return writable_; |
| } |
| |
| bool DatagramDtlsAdaptor::receiving() const { |
| return receiving_; |
| } |
| |
| int DatagramDtlsAdaptor::SetOption(rtc::Socket::Option opt, int value) { |
| return ice_transport_->SetOption(opt, value); |
| } |
| |
| int DatagramDtlsAdaptor::GetError() { |
| return ice_transport_->GetError(); |
| } |
| |
| void DatagramDtlsAdaptor::OnNetworkRouteChanged( |
| absl::optional<rtc::NetworkRoute> network_route) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| SignalNetworkRouteChanged(network_route); |
| } |
| |
| void DatagramDtlsAdaptor::OnReceivingState( |
| rtc::PacketTransportInternal* transport) { |
| RTC_DCHECK_RUN_ON(&thread_checker_); |
| RTC_DCHECK(transport == ice_transport_); |
| RTC_LOG(LS_VERBOSE) << "ice_transport receiving state changed to " |
| << ice_transport_->receiving(); |
| |
| if (kBypassDatagramDtlsTestOnly || dtls_state() == DTLS_TRANSPORT_CONNECTED) { |
| // Note: SignalReceivingState fired by set_receiving. |
| set_receiving(ice_transport_->receiving()); |
| } |
| } |
| |
| void DatagramDtlsAdaptor::set_receiving(bool receiving) { |
| if (receiving_ == receiving) { |
| return; |
| } |
| receiving_ = receiving; |
| SignalReceivingState(this); |
| } |
| |
| // Similar implementaton as in p2p/base/dtls_transport.cc. |
| void DatagramDtlsAdaptor::set_writable(bool writable) { |
| if (writable_ == writable) { |
| return; |
| } |
| if (event_log_) { |
| event_log_->Log( |
| absl::make_unique<webrtc::RtcEventDtlsWritableState>(writable)); |
| } |
| RTC_LOG(LS_VERBOSE) << "set_writable to: " << writable; |
| writable_ = writable; |
| if (writable_) { |
| SignalReadyToSend(this); |
| } |
| SignalWritableState(this); |
| } |
| |
| // Similar implementaton as in p2p/base/dtls_transport.cc. |
| void DatagramDtlsAdaptor::set_dtls_state(DtlsTransportState state) { |
| if (dtls_state_ == state) { |
| return; |
| } |
| if (event_log_) { |
| event_log_->Log(absl::make_unique<webrtc::RtcEventDtlsTransportState>( |
| ConvertDtlsTransportState(state))); |
| } |
| RTC_LOG(LS_VERBOSE) << "set_dtls_state from:" << dtls_state_ << " to " |
| << state; |
| dtls_state_ = state; |
| SignalDtlsState(this, state); |
| } |
| |
| } // namespace cricket |