ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 1 | /* |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 2 | * Copyright 2020 The WebRTC project authors. All Rights Reserved. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 11 | #ifndef PC_SCTP_DATA_CHANNEL_H_ |
| 12 | #define PC_SCTP_DATA_CHANNEL_H_ |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 13 | |
Steve Anton | 944c755 | 2018-12-13 14:19:10 -0800 | [diff] [blame] | 14 | #include <memory> |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 15 | #include <set> |
| 16 | #include <string> |
| 17 | |
Steve Anton | 10542f2 | 2019-01-11 09:11:00 -0800 | [diff] [blame] | 18 | #include "api/data_channel_interface.h" |
Harald Alvestrand | fd5ae7f | 2020-05-16 08:37:49 +0200 | [diff] [blame] | 19 | #include "api/priority.h" |
Mirko Bonadei | d970807 | 2019-01-25 20:26:48 +0100 | [diff] [blame] | 20 | #include "api/scoped_refptr.h" |
Niels Möller | 2a70703 | 2020-06-16 16:39:13 +0200 | [diff] [blame] | 21 | #include "api/transport/data_channel_transport_interface.h" |
Steve Anton | 10542f2 | 2019-01-11 09:11:00 -0800 | [diff] [blame] | 22 | #include "media/base/media_channel.h" |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 23 | #include "pc/data_channel_utils.h" |
Steve Anton | 10542f2 | 2019-01-11 09:11:00 -0800 | [diff] [blame] | 24 | #include "rtc_base/async_invoker.h" |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 25 | #include "rtc_base/ssl_stream_adapter.h" // For SSLRole |
Artem Titov | e41c433 | 2018-07-25 15:04:28 +0200 | [diff] [blame] | 26 | #include "rtc_base/third_party/sigslot/sigslot.h" |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 27 | |
| 28 | namespace webrtc { |
| 29 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 30 | class SctpDataChannel; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 31 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 32 | // TODO(deadbeef): Get rid of this and have SctpDataChannel depend on |
| 33 | // SctpTransportInternal (pure virtual SctpTransport interface) instead. |
| 34 | class SctpDataChannelProviderInterface { |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 35 | public: |
| 36 | // Sends the data to the transport. |
| 37 | virtual bool SendData(const cricket::SendDataParams& params, |
| 38 | const rtc::CopyOnWriteBuffer& payload, |
| 39 | cricket::SendDataResult* result) = 0; |
| 40 | // Connects to the transport signals. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 41 | virtual bool ConnectDataChannel(SctpDataChannel* data_channel) = 0; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 42 | // Disconnects from the transport signals. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 43 | virtual void DisconnectDataChannel(SctpDataChannel* data_channel) = 0; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 44 | // Adds the data channel SID to the transport for SCTP. |
| 45 | virtual void AddSctpDataStream(int sid) = 0; |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 46 | // Begins the closing procedure by sending an outgoing stream reset. Still |
| 47 | // need to wait for callbacks to tell when this completes. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 48 | virtual void RemoveSctpDataStream(int sid) = 0; |
| 49 | // Returns true if the transport channel is ready to send data. |
| 50 | virtual bool ReadyToSendData() const = 0; |
| 51 | |
| 52 | protected: |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 53 | virtual ~SctpDataChannelProviderInterface() {} |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 54 | }; |
| 55 | |
Tomas Gunnarsson | 0ca13d9 | 2020-06-10 12:17:50 +0200 | [diff] [blame] | 56 | // TODO(tommi): Change to not inherit from DataChannelInit but to have it as |
| 57 | // a const member. Block access to the 'id' member since it cannot be const. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 58 | struct InternalDataChannelInit : public DataChannelInit { |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 59 | enum OpenHandshakeRole { kOpener, kAcker, kNone }; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 60 | // The default role is kOpener because the default |negotiated| is false. |
| 61 | InternalDataChannelInit() : open_handshake_role(kOpener) {} |
Harald Alvestrand | f3736ed | 2019-04-08 13:09:30 +0200 | [diff] [blame] | 62 | explicit InternalDataChannelInit(const DataChannelInit& base); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 63 | OpenHandshakeRole open_handshake_role; |
| 64 | }; |
| 65 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 66 | // Helper class to allocate unique IDs for SCTP DataChannels. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 67 | class SctpSidAllocator { |
| 68 | public: |
| 69 | // Gets the first unused odd/even id based on the DTLS role. If |role| is |
| 70 | // SSL_CLIENT, the allocated id starts from 0 and takes even numbers; |
| 71 | // otherwise, the id starts from 1 and takes odd numbers. |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 72 | // Returns false if no ID can be allocated. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 73 | bool AllocateSid(rtc::SSLRole role, int* sid); |
| 74 | |
| 75 | // Attempts to reserve a specific sid. Returns false if it's unavailable. |
| 76 | bool ReserveSid(int sid); |
| 77 | |
| 78 | // Indicates that |sid| isn't in use any more, and is thus available again. |
| 79 | void ReleaseSid(int sid); |
| 80 | |
| 81 | private: |
| 82 | // Checks if |sid| is available to be assigned to a new SCTP data channel. |
| 83 | bool IsSidAvailable(int sid) const; |
| 84 | |
| 85 | std::set<int> used_sids_; |
| 86 | }; |
| 87 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 88 | // SctpDataChannel is an implementation of the DataChannelInterface based on |
| 89 | // SctpTransport. It provides an implementation of unreliable or |
| 90 | // reliabledata channels. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 91 | |
| 92 | // DataChannel states: |
| 93 | // kConnecting: The channel has been created the transport might not yet be |
| 94 | // ready. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 95 | // kOpen: The open handshake has been performed (if relevant) and the data |
| 96 | // channel is able to send messages. |
| 97 | // kClosing: DataChannelInterface::Close has been called, or the remote side |
| 98 | // initiated the closing procedure, but the closing procedure has not |
| 99 | // yet finished. |
| 100 | // kClosed: The closing handshake is finished (possibly initiated from this, |
| 101 | // side, possibly from the peer). |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 102 | // |
| 103 | // How the closing procedure works for SCTP: |
| 104 | // 1. Alice calls Close(), state changes to kClosing. |
| 105 | // 2. Alice finishes sending any queued data. |
| 106 | // 3. Alice calls RemoveSctpDataStream, sends outgoing stream reset. |
| 107 | // 4. Bob receives incoming stream reset; OnClosingProcedureStartedRemotely |
| 108 | // called. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 109 | // 5. Bob sends outgoing stream reset. |
| 110 | // 6. Alice receives incoming reset, Bob receives acknowledgement. Both receive |
| 111 | // OnClosingProcedureComplete callback and transition to kClosed. |
| 112 | class SctpDataChannel : public DataChannelInterface, |
| 113 | public sigslot::has_slots<> { |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 114 | public: |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 115 | static rtc::scoped_refptr<SctpDataChannel> Create( |
| 116 | SctpDataChannelProviderInterface* provider, |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 117 | const std::string& label, |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 118 | const InternalDataChannelInit& config, |
| 119 | rtc::Thread* signaling_thread, |
| 120 | rtc::Thread* network_thread); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 121 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 122 | // Instantiates an API proxy for a SctpDataChannel instance that will be |
| 123 | // handed out to external callers. |
Tomas Gunnarsson | 6476d0b | 2020-06-16 18:39:50 +0200 | [diff] [blame] | 124 | static rtc::scoped_refptr<DataChannelInterface> CreateProxy( |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 125 | rtc::scoped_refptr<SctpDataChannel> channel); |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 126 | |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 127 | void RegisterObserver(DataChannelObserver* observer) override; |
| 128 | void UnregisterObserver() override; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 129 | |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 130 | std::string label() const override { return label_; } |
| 131 | bool reliable() const override; |
| 132 | bool ordered() const override { return config_.ordered; } |
Harald Alvestrand | f3736ed | 2019-04-08 13:09:30 +0200 | [diff] [blame] | 133 | // Backwards compatible accessors |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 134 | uint16_t maxRetransmitTime() const override { |
Harald Alvestrand | f3736ed | 2019-04-08 13:09:30 +0200 | [diff] [blame] | 135 | return config_.maxRetransmitTime ? *config_.maxRetransmitTime |
| 136 | : static_cast<uint16_t>(-1); |
| 137 | } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 138 | uint16_t maxRetransmits() const override { |
Harald Alvestrand | f3736ed | 2019-04-08 13:09:30 +0200 | [diff] [blame] | 139 | return config_.maxRetransmits ? *config_.maxRetransmits |
| 140 | : static_cast<uint16_t>(-1); |
| 141 | } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 142 | absl::optional<int> maxPacketLifeTime() const override { |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 143 | return config_.maxRetransmitTime; |
| 144 | } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 145 | absl::optional<int> maxRetransmitsOpt() const override { |
Harald Alvestrand | f3736ed | 2019-04-08 13:09:30 +0200 | [diff] [blame] | 146 | return config_.maxRetransmits; |
| 147 | } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 148 | std::string protocol() const override { return config_.protocol; } |
| 149 | bool negotiated() const override { return config_.negotiated; } |
| 150 | int id() const override { return config_.id; } |
| 151 | Priority priority() const override { |
Harald Alvestrand | fd5ae7f | 2020-05-16 08:37:49 +0200 | [diff] [blame] | 152 | return config_.priority ? *config_.priority : Priority::kLow; |
| 153 | } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 154 | |
Harald Alvestrand | 928e7a3 | 2019-07-31 07:16:45 -0400 | [diff] [blame] | 155 | virtual int internal_id() const { return internal_id_; } |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 156 | |
| 157 | uint64_t buffered_amount() const override; |
| 158 | void Close() override; |
| 159 | DataState state() const override; |
| 160 | RTCError error() const override; |
| 161 | uint32_t messages_sent() const override; |
| 162 | uint64_t bytes_sent() const override; |
| 163 | uint32_t messages_received() const override; |
| 164 | uint64_t bytes_received() const override; |
| 165 | bool Send(const DataBuffer& buffer) override; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 166 | |
Harald Alvestrand | 1f928d3 | 2019-03-28 11:29:38 +0100 | [diff] [blame] | 167 | // Close immediately, ignoring any queued data or closing procedure. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 168 | // This is called when the underlying SctpTransport is being destroyed. |
Harald Alvestrand | 1f928d3 | 2019-03-28 11:29:38 +0100 | [diff] [blame] | 169 | // It is also called by the PeerConnection if SCTP ID assignment fails. |
Harald Alvestrand | dfbfb46 | 2019-12-08 05:55:43 +0100 | [diff] [blame] | 170 | void CloseAbruptlyWithError(RTCError error); |
| 171 | // Specializations of CloseAbruptlyWithError |
| 172 | void CloseAbruptlyWithDataChannelFailure(const std::string& message); |
| 173 | void CloseAbruptlyWithSctpCauseCode(const std::string& message, |
| 174 | uint16_t cause_code); |
Harald Alvestrand | 1f928d3 | 2019-03-28 11:29:38 +0100 | [diff] [blame] | 175 | |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 176 | // Slots for provider to connect signals to. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 177 | // |
| 178 | // TODO(deadbeef): Make these private once we're hooking up signals ourselves, |
| 179 | // instead of relying on SctpDataChannelProviderInterface. |
| 180 | |
| 181 | // Called when the SctpTransport's ready to use. That can happen when we've |
| 182 | // finished negotiation, or if the channel was created after negotiation has |
| 183 | // already finished. |
| 184 | void OnTransportReady(bool writable); |
| 185 | |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 186 | void OnDataReceived(const cricket::ReceiveDataParams& params, |
| 187 | const rtc::CopyOnWriteBuffer& payload); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 188 | |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 189 | // Sets the SCTP sid and adds to transport layer if not set yet. Should only |
| 190 | // be called once. |
| 191 | void SetSctpSid(int sid); |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 192 | // The remote side started the closing procedure by resetting its outgoing |
| 193 | // stream (our incoming stream). Sets state to kClosing. |
| 194 | void OnClosingProcedureStartedRemotely(int sid); |
| 195 | // The closing procedure is complete; both incoming and outgoing stream |
| 196 | // resets are done and the channel can transition to kClosed. Called |
| 197 | // asynchronously after RemoveSctpDataStream. |
| 198 | void OnClosingProcedureComplete(int sid); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 199 | // Called when the transport channel is created. |
| 200 | // Only needs to be called for SCTP data channels. |
| 201 | void OnTransportChannelCreated(); |
Harald Alvestrand | 408cb4b | 2019-11-16 12:09:08 +0100 | [diff] [blame] | 202 | // Called when the transport channel is unusable. |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 203 | // This method makes sure the DataChannel is disconnected and changes state |
| 204 | // to kClosed. |
Harald Alvestrand | 408cb4b | 2019-11-16 12:09:08 +0100 | [diff] [blame] | 205 | void OnTransportChannelClosed(); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 206 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 207 | DataChannelStats GetStats() const; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 208 | |
| 209 | // Emitted when state transitions to kOpen. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 210 | sigslot::signal1<DataChannelInterface*> SignalOpened; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 211 | // Emitted when state transitions to kClosed. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 212 | // This signal can be used to tell when the channel's sid is free. |
| 213 | sigslot::signal1<DataChannelInterface*> SignalClosed; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 214 | |
Harald Alvestrand | 928e7a3 | 2019-07-31 07:16:45 -0400 | [diff] [blame] | 215 | // Reset the allocator for internal ID values for testing, so that |
| 216 | // the internal IDs generated are predictable. Test only. |
| 217 | static void ResetInternalIdAllocatorForTesting(int new_value); |
| 218 | |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 219 | protected: |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 220 | SctpDataChannel(const InternalDataChannelInit& config, |
| 221 | SctpDataChannelProviderInterface* client, |
| 222 | const std::string& label, |
| 223 | rtc::Thread* signaling_thread, |
| 224 | rtc::Thread* network_thread); |
| 225 | ~SctpDataChannel() override; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 226 | |
| 227 | private: |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 228 | // The OPEN(_ACK) signaling state. |
| 229 | enum HandshakeState { |
| 230 | kHandshakeInit, |
| 231 | kHandshakeShouldSendOpen, |
| 232 | kHandshakeShouldSendAck, |
| 233 | kHandshakeWaitingForAck, |
| 234 | kHandshakeReady |
| 235 | }; |
| 236 | |
Tomas Gunnarsson | 0ca13d9 | 2020-06-10 12:17:50 +0200 | [diff] [blame] | 237 | bool Init(); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 238 | void UpdateState(); |
| 239 | void SetState(DataState state); |
| 240 | void DisconnectFromProvider(); |
| 241 | |
| 242 | void DeliverQueuedReceivedData(); |
| 243 | |
| 244 | void SendQueuedDataMessages(); |
| 245 | bool SendDataMessage(const DataBuffer& buffer, bool queue_if_blocked); |
| 246 | bool QueueSendDataMessage(const DataBuffer& buffer); |
| 247 | |
| 248 | void SendQueuedControlMessages(); |
| 249 | void QueueControlMessage(const rtc::CopyOnWriteBuffer& buffer); |
| 250 | bool SendControlMessage(const rtc::CopyOnWriteBuffer& buffer); |
| 251 | |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 252 | rtc::Thread* const signaling_thread_; |
| 253 | rtc::Thread* const network_thread_; |
Harald Alvestrand | 928e7a3 | 2019-07-31 07:16:45 -0400 | [diff] [blame] | 254 | const int internal_id_; |
Tomas Gunnarsson | 0ca13d9 | 2020-06-10 12:17:50 +0200 | [diff] [blame] | 255 | const std::string label_; |
| 256 | const InternalDataChannelInit config_; |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 257 | DataChannelObserver* observer_ RTC_GUARDED_BY(signaling_thread_) = nullptr; |
| 258 | DataState state_ RTC_GUARDED_BY(signaling_thread_) = kConnecting; |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 259 | RTCError error_ RTC_GUARDED_BY(signaling_thread_); |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 260 | uint32_t messages_sent_ RTC_GUARDED_BY(signaling_thread_) = 0; |
| 261 | uint64_t bytes_sent_ RTC_GUARDED_BY(signaling_thread_) = 0; |
| 262 | uint32_t messages_received_ RTC_GUARDED_BY(signaling_thread_) = 0; |
| 263 | uint64_t bytes_received_ RTC_GUARDED_BY(signaling_thread_) = 0; |
Marina Ciocea | e448a3f | 2019-03-04 15:52:21 +0100 | [diff] [blame] | 264 | // Number of bytes of data that have been queued using Send(). Increased |
| 265 | // before each transport send and decreased after each successful send. |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 266 | uint64_t buffered_amount_ RTC_GUARDED_BY(signaling_thread_) = 0; |
| 267 | SctpDataChannelProviderInterface* const provider_ |
| 268 | RTC_GUARDED_BY(signaling_thread_); |
| 269 | HandshakeState handshake_state_ RTC_GUARDED_BY(signaling_thread_) = |
| 270 | kHandshakeInit; |
| 271 | bool connected_to_provider_ RTC_GUARDED_BY(signaling_thread_) = false; |
| 272 | bool writable_ RTC_GUARDED_BY(signaling_thread_) = false; |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 273 | // Did we already start the graceful SCTP closing procedure? |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 274 | bool started_closing_procedure_ RTC_GUARDED_BY(signaling_thread_) = false; |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 275 | // Control messages that always have to get sent out before any queued |
| 276 | // data. |
Tomas Gunnarsson | 7d3cfbf | 2020-06-15 13:47:42 +0200 | [diff] [blame] | 277 | PacketQueue queued_control_data_ RTC_GUARDED_BY(signaling_thread_); |
| 278 | PacketQueue queued_received_data_ RTC_GUARDED_BY(signaling_thread_); |
| 279 | PacketQueue queued_send_data_ RTC_GUARDED_BY(signaling_thread_); |
| 280 | rtc::AsyncInvoker invoker_ RTC_GUARDED_BY(signaling_thread_); |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 281 | }; |
| 282 | |
ossu | 7bb87ee | 2017-01-23 04:56:25 -0800 | [diff] [blame] | 283 | } // namespace webrtc |
| 284 | |
Taylor Brandstetter | 3a034e1 | 2020-07-09 15:32:34 -0700 | [diff] [blame] | 285 | #endif // PC_SCTP_DATA_CHANNEL_H_ |