henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
kjellander | b24317b | 2016-02-10 07:54:43 -0800 | [diff] [blame] | 2 | * Copyright 2012 The WebRTC project authors. All Rights Reserved. |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 3 | * |
kjellander | b24317b | 2016-02-10 07:54:43 -0800 | [diff] [blame] | 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. |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 9 | */ |
jlmiller@webrtc.org | 5f93d0a | 2015-01-20 21:36:13 +0000 | [diff] [blame] | 10 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 11 | #include "pc/datachannel.h" |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 12 | |
kwiberg | d1fe281 | 2016-04-27 06:47:29 -0700 | [diff] [blame] | 13 | #include <memory> |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 14 | #include <string> |
| 15 | |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 16 | #include "media/sctp/sctptransportinternal.h" |
| 17 | #include "pc/sctputils.h" |
| 18 | #include "rtc_base/checks.h" |
Yves Gerey | 3e70781 | 2018-11-28 16:47:49 +0100 | [diff] [blame^] | 19 | #include "rtc_base/location.h" |
Mirko Bonadei | 92ea95e | 2017-09-15 06:47:31 +0200 | [diff] [blame] | 20 | #include "rtc_base/logging.h" |
Yves Gerey | 3e70781 | 2018-11-28 16:47:49 +0100 | [diff] [blame^] | 21 | #include "rtc_base/refcountedobject.h" |
| 22 | #include "rtc_base/thread.h" |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 23 | |
| 24 | namespace webrtc { |
| 25 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 26 | static size_t kMaxQueuedReceivedDataBytes = 16 * 1024 * 1024; |
| 27 | static size_t kMaxQueuedSendDataBytes = 16 * 1024 * 1024; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 28 | |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 29 | bool SctpSidAllocator::AllocateSid(rtc::SSLRole role, int* sid) { |
| 30 | int potential_sid = (role == rtc::SSL_CLIENT) ? 0 : 1; |
| 31 | while (!IsSidAvailable(potential_sid)) { |
| 32 | potential_sid += 2; |
| 33 | if (potential_sid > static_cast<int>(cricket::kMaxSctpSid)) { |
| 34 | return false; |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | *sid = potential_sid; |
| 39 | used_sids_.insert(potential_sid); |
| 40 | return true; |
| 41 | } |
| 42 | |
| 43 | bool SctpSidAllocator::ReserveSid(int sid) { |
| 44 | if (!IsSidAvailable(sid)) { |
| 45 | return false; |
| 46 | } |
| 47 | used_sids_.insert(sid); |
| 48 | return true; |
| 49 | } |
| 50 | |
| 51 | void SctpSidAllocator::ReleaseSid(int sid) { |
| 52 | auto it = used_sids_.find(sid); |
| 53 | if (it != used_sids_.end()) { |
| 54 | used_sids_.erase(it); |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | bool SctpSidAllocator::IsSidAvailable(int sid) const { |
Taylor Brandstetter | 1d7a637 | 2016-08-24 13:15:27 -0700 | [diff] [blame] | 59 | if (sid < static_cast<int>(cricket::kMinSctpSid) || |
| 60 | sid > static_cast<int>(cricket::kMaxSctpSid)) { |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 61 | return false; |
| 62 | } |
| 63 | return used_sids_.find(sid) == used_sids_.end(); |
| 64 | } |
| 65 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 66 | DataChannel::PacketQueue::PacketQueue() : byte_count_(0) {} |
| 67 | |
| 68 | DataChannel::PacketQueue::~PacketQueue() { |
| 69 | Clear(); |
| 70 | } |
| 71 | |
| 72 | bool DataChannel::PacketQueue::Empty() const { |
| 73 | return packets_.empty(); |
| 74 | } |
| 75 | |
| 76 | DataBuffer* DataChannel::PacketQueue::Front() { |
| 77 | return packets_.front(); |
| 78 | } |
| 79 | |
| 80 | void DataChannel::PacketQueue::Pop() { |
| 81 | if (packets_.empty()) { |
| 82 | return; |
| 83 | } |
| 84 | |
| 85 | byte_count_ -= packets_.front()->size(); |
| 86 | packets_.pop_front(); |
| 87 | } |
| 88 | |
| 89 | void DataChannel::PacketQueue::Push(DataBuffer* packet) { |
| 90 | byte_count_ += packet->size(); |
| 91 | packets_.push_back(packet); |
| 92 | } |
| 93 | |
| 94 | void DataChannel::PacketQueue::Clear() { |
| 95 | while (!packets_.empty()) { |
| 96 | delete packets_.front(); |
| 97 | packets_.pop_front(); |
| 98 | } |
| 99 | byte_count_ = 0; |
| 100 | } |
| 101 | |
| 102 | void DataChannel::PacketQueue::Swap(PacketQueue* other) { |
| 103 | size_t other_byte_count = other->byte_count_; |
| 104 | other->byte_count_ = byte_count_; |
| 105 | byte_count_ = other_byte_count; |
| 106 | |
| 107 | other->packets_.swap(packets_); |
| 108 | } |
| 109 | |
buildbot@webrtc.org | d4e598d | 2014-07-29 17:36:52 +0000 | [diff] [blame] | 110 | rtc::scoped_refptr<DataChannel> DataChannel::Create( |
wu@webrtc.org | 7818752 | 2013-10-07 23:32:02 +0000 | [diff] [blame] | 111 | DataChannelProviderInterface* provider, |
| 112 | cricket::DataChannelType dct, |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 113 | const std::string& label, |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 114 | const InternalDataChannelInit& config) { |
buildbot@webrtc.org | d4e598d | 2014-07-29 17:36:52 +0000 | [diff] [blame] | 115 | rtc::scoped_refptr<DataChannel> channel( |
| 116 | new rtc::RefCountedObject<DataChannel>(provider, dct, label)); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 117 | if (!channel->Init(config)) { |
| 118 | return NULL; |
| 119 | } |
| 120 | return channel; |
| 121 | } |
| 122 | |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 123 | bool DataChannel::IsSctpLike(cricket::DataChannelType type) { |
| 124 | return type == cricket::DCT_SCTP || type == cricket::DCT_MEDIA_TRANSPORT; |
| 125 | } |
| 126 | |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 127 | DataChannel::DataChannel(DataChannelProviderInterface* provider, |
| 128 | cricket::DataChannelType dct, |
| 129 | const std::string& label) |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 130 | : label_(label), |
hbos | 84ffdee | 2016-10-12 14:14:39 -0700 | [diff] [blame] | 131 | observer_(nullptr), |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 132 | state_(kConnecting), |
hbos | 84ffdee | 2016-10-12 14:14:39 -0700 | [diff] [blame] | 133 | messages_sent_(0), |
| 134 | bytes_sent_(0), |
| 135 | messages_received_(0), |
| 136 | bytes_received_(0), |
henrika@webrtc.org | 44461fa | 2014-01-13 09:35:02 +0000 | [diff] [blame] | 137 | data_channel_type_(dct), |
| 138 | provider_(provider), |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 139 | handshake_state_(kHandshakeInit), |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 140 | connected_to_provider_(false), |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 141 | send_ssrc_set_(false), |
henrika@webrtc.org | 44461fa | 2014-01-13 09:35:02 +0000 | [diff] [blame] | 142 | receive_ssrc_set_(false), |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 143 | writable_(false), |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 144 | send_ssrc_(0), |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 145 | receive_ssrc_(0) {} |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 146 | |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 147 | bool DataChannel::Init(const InternalDataChannelInit& config) { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 148 | if (data_channel_type_ == cricket::DCT_RTP) { |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 149 | if (config.reliable || config.id != -1 || config.maxRetransmits != -1 || |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 150 | config.maxRetransmitTime != -1) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 151 | RTC_LOG(LS_ERROR) << "Failed to initialize the RTP data channel due to " |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 152 | "invalid DataChannelInit."; |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 153 | return false; |
| 154 | } |
| 155 | handshake_state_ = kHandshakeReady; |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 156 | } else if (IsSctpLike(data_channel_type_)) { |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 157 | if (config.id < -1 || config.maxRetransmits < -1 || |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 158 | config.maxRetransmitTime < -1) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 159 | RTC_LOG(LS_ERROR) << "Failed to initialize the SCTP data channel due to " |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 160 | "invalid DataChannelInit."; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 161 | return false; |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 162 | } |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 163 | if (config.maxRetransmits != -1 && config.maxRetransmitTime != -1) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 164 | RTC_LOG(LS_ERROR) |
| 165 | << "maxRetransmits and maxRetransmitTime should not be both set."; |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 166 | return false; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 167 | } |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 168 | config_ = config; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 169 | |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 170 | switch (config_.open_handshake_role) { |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 171 | case webrtc::InternalDataChannelInit::kNone: // pre-negotiated |
| 172 | handshake_state_ = kHandshakeReady; |
| 173 | break; |
| 174 | case webrtc::InternalDataChannelInit::kOpener: |
| 175 | handshake_state_ = kHandshakeShouldSendOpen; |
| 176 | break; |
| 177 | case webrtc::InternalDataChannelInit::kAcker: |
| 178 | handshake_state_ = kHandshakeShouldSendAck; |
| 179 | break; |
Steve Anton | 36b29d1 | 2017-10-30 09:57:42 -0700 | [diff] [blame] | 180 | } |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 181 | |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 182 | // Try to connect to the transport in case the transport channel already |
| 183 | // exists. |
| 184 | OnTransportChannelCreated(); |
wu@webrtc.org | 07a6fbe | 2013-11-04 18:41:34 +0000 | [diff] [blame] | 185 | |
| 186 | // Checks if the transport is ready to send because the initial channel |
| 187 | // ready signal may have been sent before the DataChannel creation. |
| 188 | // This has to be done async because the upper layer objects (e.g. |
| 189 | // Chrome glue and WebKit) are not wired up properly until after this |
| 190 | // function returns. |
| 191 | if (provider_->ReadyToSendData()) { |
Steve Anton | 044a04d | 2018-08-31 13:51:19 -0700 | [diff] [blame] | 192 | invoker_.AsyncInvoke<void>(RTC_FROM_HERE, rtc::Thread::Current(), |
| 193 | [this] { OnChannelReady(true); }); |
wu@webrtc.org | 07a6fbe | 2013-11-04 18:41:34 +0000 | [diff] [blame] | 194 | } |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | return true; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 198 | } |
| 199 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 200 | DataChannel::~DataChannel() {} |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 201 | |
| 202 | void DataChannel::RegisterObserver(DataChannelObserver* observer) { |
| 203 | observer_ = observer; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 204 | DeliverQueuedReceivedData(); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 205 | } |
| 206 | |
| 207 | void DataChannel::UnregisterObserver() { |
| 208 | observer_ = NULL; |
| 209 | } |
| 210 | |
| 211 | bool DataChannel::reliable() const { |
wu@webrtc.org | 7818752 | 2013-10-07 23:32:02 +0000 | [diff] [blame] | 212 | if (data_channel_type_ == cricket::DCT_RTP) { |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 213 | return false; |
| 214 | } else { |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 215 | return config_.maxRetransmits == -1 && config_.maxRetransmitTime == -1; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 216 | } |
| 217 | } |
| 218 | |
Peter Boström | 0c4e06b | 2015-10-07 12:23:21 +0200 | [diff] [blame] | 219 | uint64_t DataChannel::buffered_amount() const { |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 220 | return queued_send_data_.byte_count(); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | void DataChannel::Close() { |
| 224 | if (state_ == kClosed) |
| 225 | return; |
| 226 | send_ssrc_ = 0; |
| 227 | send_ssrc_set_ = false; |
| 228 | SetState(kClosing); |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 229 | // Will send queued data before beginning the underlying closing procedure. |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 230 | UpdateState(); |
| 231 | } |
| 232 | |
| 233 | bool DataChannel::Send(const DataBuffer& buffer) { |
| 234 | if (state_ != kOpen) { |
| 235 | return false; |
| 236 | } |
jiayl@webrtc.org | 3edbaaf | 2014-07-18 23:57:50 +0000 | [diff] [blame] | 237 | |
| 238 | // TODO(jiayl): the spec is unclear about if the remote side should get the |
| 239 | // onmessage event. We need to figure out the expected behavior and change the |
| 240 | // code accordingly. |
| 241 | if (buffer.size() == 0) { |
| 242 | return true; |
| 243 | } |
| 244 | |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 245 | // If the queue is non-empty, we're waiting for SignalReadyToSend, |
| 246 | // so just add to the end of the queue and keep waiting. |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 247 | if (!queued_send_data_.Empty()) { |
| 248 | // Only SCTP DataChannel queues the outgoing data when the transport is |
| 249 | // blocked. |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 250 | RTC_DCHECK(IsSctpLike(data_channel_type_)); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 251 | if (!QueueSendDataMessage(buffer)) { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 252 | RTC_LOG(LS_ERROR) << "Closing the DataChannel due to a failure to queue " |
| 253 | "additional data."; |
| 254 | CloseAbruptly(); |
jiayl@webrtc.org | 5dc51fb | 2014-05-29 15:33:54 +0000 | [diff] [blame] | 255 | } |
| 256 | return true; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 257 | } |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 258 | |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 259 | bool success = SendDataMessage(buffer, true); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 260 | if (data_channel_type_ == cricket::DCT_RTP) { |
| 261 | return success; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 262 | } |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 263 | |
| 264 | // Always return true for SCTP DataChannel per the spec. |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 265 | return true; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 266 | } |
| 267 | |
Peter Boström | 0c4e06b | 2015-10-07 12:23:21 +0200 | [diff] [blame] | 268 | void DataChannel::SetReceiveSsrc(uint32_t receive_ssrc) { |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 269 | RTC_DCHECK(data_channel_type_ == cricket::DCT_RTP); |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 270 | |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 271 | if (receive_ssrc_set_) { |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 272 | return; |
| 273 | } |
| 274 | receive_ssrc_ = receive_ssrc; |
| 275 | receive_ssrc_set_ = true; |
| 276 | UpdateState(); |
| 277 | } |
| 278 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 279 | void DataChannel::SetSctpSid(int sid) { |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 280 | RTC_DCHECK_LT(config_.id, 0); |
| 281 | RTC_DCHECK_GE(sid, 0); |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 282 | RTC_DCHECK(IsSctpLike(data_channel_type_)); |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 283 | if (config_.id == sid) { |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 284 | return; |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 285 | } |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 286 | |
| 287 | config_.id = sid; |
| 288 | provider_->AddSctpDataStream(sid); |
| 289 | } |
| 290 | |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 291 | void DataChannel::OnClosingProcedureStartedRemotely(int sid) { |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 292 | if (IsSctpLike(data_channel_type_) && sid == config_.id && |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 293 | state_ != kClosing && state_ != kClosed) { |
| 294 | // Don't bother sending queued data since the side that initiated the |
| 295 | // closure wouldn't receive it anyway. See crbug.com/559394 for a lengthy |
| 296 | // discussion about this. |
| 297 | queued_send_data_.Clear(); |
| 298 | queued_control_data_.Clear(); |
| 299 | // Just need to change state to kClosing, SctpTransport will handle the |
| 300 | // rest of the closing procedure and OnClosingProcedureComplete will be |
| 301 | // called later. |
| 302 | started_closing_procedure_ = true; |
| 303 | SetState(kClosing); |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | void DataChannel::OnClosingProcedureComplete(int sid) { |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 308 | if (IsSctpLike(data_channel_type_) && sid == config_.id) { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 309 | // If the closing procedure is complete, we should have finished sending |
| 310 | // all pending data and transitioned to kClosing already. |
| 311 | RTC_DCHECK_EQ(state_, kClosing); |
| 312 | RTC_DCHECK(queued_send_data_.Empty()); |
| 313 | DisconnectFromProvider(); |
| 314 | SetState(kClosed); |
| 315 | } |
| 316 | } |
| 317 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 318 | void DataChannel::OnTransportChannelCreated() { |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 319 | RTC_DCHECK(IsSctpLike(data_channel_type_)); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 320 | if (!connected_to_provider_) { |
| 321 | connected_to_provider_ = provider_->ConnectDataChannel(this); |
| 322 | } |
| 323 | // The sid may have been unassigned when provider_->ConnectDataChannel was |
| 324 | // done. So always add the streams even if connected_to_provider_ is true. |
| 325 | if (config_.id >= 0) { |
| 326 | provider_->AddSctpDataStream(config_.id); |
| 327 | } |
| 328 | } |
| 329 | |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 330 | void DataChannel::OnTransportChannelDestroyed() { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 331 | // The SctpTransport is going away (for example, because the SCTP m= section |
| 332 | // was rejected), so we need to close abruptly. |
| 333 | CloseAbruptly(); |
| 334 | } |
| 335 | |
| 336 | // The remote peer request that this channel shall be closed. |
| 337 | void DataChannel::RemotePeerRequestClose() { |
| 338 | RTC_DCHECK(data_channel_type_ == cricket::DCT_RTP); |
| 339 | CloseAbruptly(); |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 340 | } |
| 341 | |
Peter Boström | 0c4e06b | 2015-10-07 12:23:21 +0200 | [diff] [blame] | 342 | void DataChannel::SetSendSsrc(uint32_t send_ssrc) { |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 343 | RTC_DCHECK(data_channel_type_ == cricket::DCT_RTP); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 344 | if (send_ssrc_set_) { |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 345 | return; |
| 346 | } |
| 347 | send_ssrc_ = send_ssrc; |
| 348 | send_ssrc_set_ = true; |
| 349 | UpdateState(); |
| 350 | } |
| 351 | |
deadbeef | 953c2ce | 2017-01-09 14:53:41 -0800 | [diff] [blame] | 352 | void DataChannel::OnDataReceived(const cricket::ReceiveDataParams& params, |
jbauch | eec21bd | 2016-03-20 06:15:43 -0700 | [diff] [blame] | 353 | const rtc::CopyOnWriteBuffer& payload) { |
deadbeef | 953c2ce | 2017-01-09 14:53:41 -0800 | [diff] [blame] | 354 | if (data_channel_type_ == cricket::DCT_RTP && params.ssrc != receive_ssrc_) { |
| 355 | return; |
| 356 | } |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 357 | if (IsSctpLike(data_channel_type_) && params.sid != config_.id) { |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 358 | return; |
| 359 | } |
| 360 | |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 361 | if (params.type == cricket::DMT_CONTROL) { |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 362 | RTC_DCHECK(IsSctpLike(data_channel_type_)); |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 363 | if (handshake_state_ != kHandshakeWaitingForAck) { |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 364 | // Ignore it if we are not expecting an ACK message. |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 365 | RTC_LOG(LS_WARNING) |
| 366 | << "DataChannel received unexpected CONTROL message, sid = " |
| 367 | << params.sid; |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 368 | return; |
| 369 | } |
| 370 | if (ParseDataChannelOpenAckMessage(payload)) { |
| 371 | // We can send unordered as soon as we receive the ACK message. |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 372 | handshake_state_ = kHandshakeReady; |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 373 | RTC_LOG(LS_INFO) << "DataChannel received OPEN_ACK message, sid = " |
| 374 | << params.sid; |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 375 | } else { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 376 | RTC_LOG(LS_WARNING) |
| 377 | << "DataChannel failed to parse OPEN_ACK message, sid = " |
| 378 | << params.sid; |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 379 | } |
| 380 | return; |
| 381 | } |
| 382 | |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 383 | RTC_DCHECK(params.type == cricket::DMT_BINARY || |
| 384 | params.type == cricket::DMT_TEXT); |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 385 | |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 386 | RTC_LOG(LS_VERBOSE) << "DataChannel received DATA message, sid = " |
| 387 | << params.sid; |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 388 | // We can send unordered as soon as we receive any DATA message since the |
| 389 | // remote side must have received the OPEN (and old clients do not send |
| 390 | // OPEN_ACK). |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 391 | if (handshake_state_ == kHandshakeWaitingForAck) { |
| 392 | handshake_state_ = kHandshakeReady; |
| 393 | } |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 394 | |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 395 | bool binary = (params.type == cricket::DMT_BINARY); |
kwiberg | d1fe281 | 2016-04-27 06:47:29 -0700 | [diff] [blame] | 396 | std::unique_ptr<DataBuffer> buffer(new DataBuffer(payload, binary)); |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 397 | if (state_ == kOpen && observer_) { |
hbos | 84ffdee | 2016-10-12 14:14:39 -0700 | [diff] [blame] | 398 | ++messages_received_; |
| 399 | bytes_received_ += buffer->size(); |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 400 | observer_->OnMessage(*buffer.get()); |
| 401 | } else { |
kwiberg@webrtc.org | eebcab5 | 2015-03-24 09:19:06 +0000 | [diff] [blame] | 402 | if (queued_received_data_.byte_count() + payload.size() > |
| 403 | kMaxQueuedReceivedDataBytes) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 404 | RTC_LOG(LS_ERROR) << "Queued received data exceeds the max buffer size."; |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 405 | |
| 406 | queued_received_data_.Clear(); |
| 407 | if (data_channel_type_ != cricket::DCT_RTP) { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 408 | CloseAbruptly(); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | return; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 412 | } |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 413 | queued_received_data_.Push(buffer.release()); |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 414 | } |
| 415 | } |
| 416 | |
| 417 | void DataChannel::OnChannelReady(bool writable) { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 418 | writable_ = writable; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 419 | if (!writable) { |
| 420 | return; |
| 421 | } |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 422 | |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 423 | SendQueuedControlMessages(); |
| 424 | SendQueuedDataMessages(); |
| 425 | UpdateState(); |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 426 | } |
| 427 | |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 428 | void DataChannel::CloseAbruptly() { |
| 429 | if (state_ == kClosed) { |
jiayl@webrtc.org | 9f8164c | 2014-05-30 21:53:17 +0000 | [diff] [blame] | 430 | return; |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 431 | } |
jiayl@webrtc.org | 9f8164c | 2014-05-30 21:53:17 +0000 | [diff] [blame] | 432 | |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 433 | if (connected_to_provider_) { |
| 434 | DisconnectFromProvider(); |
| 435 | } |
| 436 | |
| 437 | // Closing abruptly means any queued data gets thrown away. |
| 438 | queued_send_data_.Clear(); |
| 439 | queued_control_data_.Clear(); |
| 440 | |
| 441 | // Still go to "kClosing" before "kClosed", since observers may be expecting |
| 442 | // that. |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 443 | SetState(kClosing); |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 444 | SetState(kClosed); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | void DataChannel::UpdateState() { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 448 | // UpdateState determines what to do from a few state variables. Include |
| 449 | // all conditions required for each state transition here for |
| 450 | // clarity. OnChannelReady(true) will send any queued data and then invoke |
| 451 | // UpdateState(). |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 452 | switch (state_) { |
| 453 | case kConnecting: { |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 454 | if (send_ssrc_set_ == receive_ssrc_set_) { |
| 455 | if (data_channel_type_ == cricket::DCT_RTP && !connected_to_provider_) { |
| 456 | connected_to_provider_ = provider_->ConnectDataChannel(this); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 457 | } |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 458 | if (connected_to_provider_) { |
| 459 | if (handshake_state_ == kHandshakeShouldSendOpen) { |
jbauch | eec21bd | 2016-03-20 06:15:43 -0700 | [diff] [blame] | 460 | rtc::CopyOnWriteBuffer payload; |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 461 | WriteDataChannelOpenMessage(label_, config_, &payload); |
| 462 | SendControlMessage(payload); |
| 463 | } else if (handshake_state_ == kHandshakeShouldSendAck) { |
jbauch | eec21bd | 2016-03-20 06:15:43 -0700 | [diff] [blame] | 464 | rtc::CopyOnWriteBuffer payload; |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 465 | WriteDataChannelOpenAckMessage(&payload); |
| 466 | SendControlMessage(payload); |
| 467 | } |
Yves Gerey | 665174f | 2018-06-19 15:03:05 +0200 | [diff] [blame] | 468 | if (writable_ && (handshake_state_ == kHandshakeReady || |
| 469 | handshake_state_ == kHandshakeWaitingForAck)) { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 470 | SetState(kOpen); |
| 471 | // If we have received buffers before the channel got writable. |
| 472 | // Deliver them now. |
| 473 | DeliverQueuedReceivedData(); |
| 474 | } |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 475 | } |
| 476 | } |
| 477 | break; |
| 478 | } |
| 479 | case kOpen: { |
| 480 | break; |
| 481 | } |
| 482 | case kClosing: { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 483 | // Wait for all queued data to be sent before beginning the closing |
| 484 | // procedure. |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 485 | if (queued_send_data_.Empty() && queued_control_data_.Empty()) { |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 486 | if (data_channel_type_ == cricket::DCT_RTP) { |
| 487 | // For RTP data channels, we can go to "closed" after we finish |
| 488 | // sending data and the send/recv SSRCs are unset. |
| 489 | if (connected_to_provider_) { |
| 490 | DisconnectFromProvider(); |
| 491 | } |
| 492 | if (!send_ssrc_set_ && !receive_ssrc_set_) { |
| 493 | SetState(kClosed); |
| 494 | } |
| 495 | } else { |
| 496 | // For SCTP data channels, we need to wait for the closing procedure |
| 497 | // to complete; after calling RemoveSctpDataStream, |
| 498 | // OnClosingProcedureComplete will end up called asynchronously |
| 499 | // afterwards. |
| 500 | if (connected_to_provider_ && !started_closing_procedure_ && |
| 501 | config_.id >= 0) { |
| 502 | started_closing_procedure_ = true; |
| 503 | provider_->RemoveSctpDataStream(config_.id); |
| 504 | } |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 505 | } |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 506 | } |
| 507 | break; |
| 508 | } |
| 509 | case kClosed: |
| 510 | break; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | void DataChannel::SetState(DataState state) { |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 515 | if (state_ == state) { |
jiayl@webrtc.org | 9f8164c | 2014-05-30 21:53:17 +0000 | [diff] [blame] | 516 | return; |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 517 | } |
jiayl@webrtc.org | 9f8164c | 2014-05-30 21:53:17 +0000 | [diff] [blame] | 518 | |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 519 | state_ = state; |
| 520 | if (observer_) { |
| 521 | observer_->OnStateChange(); |
| 522 | } |
hbos | 82ebe02 | 2016-11-14 01:41:09 -0800 | [diff] [blame] | 523 | if (state_ == kOpen) { |
| 524 | SignalOpened(this); |
| 525 | } else if (state_ == kClosed) { |
deadbeef | ab9b2d1 | 2015-10-14 11:33:11 -0700 | [diff] [blame] | 526 | SignalClosed(this); |
| 527 | } |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 528 | } |
| 529 | |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 530 | void DataChannel::DisconnectFromProvider() { |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 531 | if (!connected_to_provider_) |
| 532 | return; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 533 | |
wu@webrtc.org | 7818752 | 2013-10-07 23:32:02 +0000 | [diff] [blame] | 534 | provider_->DisconnectDataChannel(this); |
| 535 | connected_to_provider_ = false; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 536 | } |
| 537 | |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 538 | void DataChannel::DeliverQueuedReceivedData() { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 539 | if (!observer_) { |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 540 | return; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 541 | } |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 542 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 543 | while (!queued_received_data_.Empty()) { |
kwiberg | d1fe281 | 2016-04-27 06:47:29 -0700 | [diff] [blame] | 544 | std::unique_ptr<DataBuffer> buffer(queued_received_data_.Front()); |
hbos | 84ffdee | 2016-10-12 14:14:39 -0700 | [diff] [blame] | 545 | ++messages_received_; |
| 546 | bytes_received_ += buffer->size(); |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 547 | observer_->OnMessage(*buffer); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 548 | queued_received_data_.Pop(); |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 549 | } |
| 550 | } |
| 551 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 552 | void DataChannel::SendQueuedDataMessages() { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 553 | if (queued_send_data_.Empty()) { |
| 554 | return; |
| 555 | } |
| 556 | |
nisse | ede5da4 | 2017-01-12 05:15:36 -0800 | [diff] [blame] | 557 | RTC_DCHECK(state_ == kOpen || state_ == kClosing); |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 558 | |
Peter Boström | 0c4e06b | 2015-10-07 12:23:21 +0200 | [diff] [blame] | 559 | uint64_t start_buffered_amount = buffered_amount(); |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 560 | while (!queued_send_data_.Empty()) { |
jiayl@webrtc.org | cceb166 | 2015-01-22 00:55:10 +0000 | [diff] [blame] | 561 | DataBuffer* buffer = queued_send_data_.Front(); |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 562 | if (!SendDataMessage(*buffer, false)) { |
jiayl@webrtc.org | cceb166 | 2015-01-22 00:55:10 +0000 | [diff] [blame] | 563 | // Leave the message in the queue if sending is aborted. |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 564 | break; |
| 565 | } |
| 566 | queued_send_data_.Pop(); |
jiayl@webrtc.org | cceb166 | 2015-01-22 00:55:10 +0000 | [diff] [blame] | 567 | delete buffer; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 568 | } |
bemasc | 0edd50c | 2015-07-01 13:34:33 -0700 | [diff] [blame] | 569 | |
| 570 | if (observer_ && buffered_amount() < start_buffered_amount) { |
| 571 | observer_->OnBufferedAmountChange(start_buffered_amount); |
| 572 | } |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 573 | } |
| 574 | |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 575 | bool DataChannel::SendDataMessage(const DataBuffer& buffer, |
| 576 | bool queue_if_blocked) { |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 577 | cricket::SendDataParams send_params; |
| 578 | |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 579 | if (IsSctpLike(data_channel_type_)) { |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 580 | send_params.ordered = config_.ordered; |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 581 | // Send as ordered if it is still going through OPEN/ACK signaling. |
| 582 | if (handshake_state_ != kHandshakeReady && !config_.ordered) { |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 583 | send_params.ordered = true; |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 584 | RTC_LOG(LS_VERBOSE) |
| 585 | << "Sending data as ordered for unordered DataChannel " |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 586 | "because the OPEN_ACK message has not been received."; |
henrika@webrtc.org | aebb1ad | 2014-01-14 10:00:58 +0000 | [diff] [blame] | 587 | } |
| 588 | |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 589 | send_params.max_rtx_count = config_.maxRetransmits; |
| 590 | send_params.max_rtx_ms = config_.maxRetransmitTime; |
deadbeef | 953c2ce | 2017-01-09 14:53:41 -0800 | [diff] [blame] | 591 | send_params.sid = config_.id; |
sergeyu@chromium.org | a23f0ca | 2013-11-13 22:48:52 +0000 | [diff] [blame] | 592 | } else { |
| 593 | send_params.ssrc = send_ssrc_; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 594 | } |
| 595 | send_params.type = buffer.binary ? cricket::DMT_BINARY : cricket::DMT_TEXT; |
| 596 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 597 | cricket::SendDataResult send_result = cricket::SDR_SUCCESS; |
| 598 | bool success = provider_->SendData(send_params, buffer.data, &send_result); |
| 599 | |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 600 | if (success) { |
hbos | 84ffdee | 2016-10-12 14:14:39 -0700 | [diff] [blame] | 601 | ++messages_sent_; |
| 602 | bytes_sent_ += buffer.size(); |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 603 | return true; |
| 604 | } |
| 605 | |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 606 | if (!IsSctpLike(data_channel_type_)) { |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 607 | return false; |
| 608 | } |
| 609 | |
| 610 | if (send_result == cricket::SDR_BLOCK) { |
| 611 | if (!queue_if_blocked || QueueSendDataMessage(buffer)) { |
| 612 | return false; |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 613 | } |
| 614 | } |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 615 | // Close the channel if the error is not SDR_BLOCK, or if queuing the |
| 616 | // message failed. |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 617 | RTC_LOG(LS_ERROR) << "Closing the DataChannel due to a failure to send data, " |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 618 | "send_result = " |
| 619 | << send_result; |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 620 | CloseAbruptly(); |
jiayl@webrtc.org | 6ca6190 | 2014-11-12 17:28:40 +0000 | [diff] [blame] | 621 | |
| 622 | return false; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 623 | } |
| 624 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 625 | bool DataChannel::QueueSendDataMessage(const DataBuffer& buffer) { |
bemasc | 0edd50c | 2015-07-01 13:34:33 -0700 | [diff] [blame] | 626 | size_t start_buffered_amount = buffered_amount(); |
| 627 | if (start_buffered_amount >= kMaxQueuedSendDataBytes) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 628 | RTC_LOG(LS_ERROR) << "Can't buffer any more data for the data channel."; |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 629 | return false; |
| 630 | } |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 631 | queued_send_data_.Push(new DataBuffer(buffer)); |
bemasc | 0edd50c | 2015-07-01 13:34:33 -0700 | [diff] [blame] | 632 | |
| 633 | // The buffer can have length zero, in which case there is no change. |
| 634 | if (observer_ && buffered_amount() > start_buffered_amount) { |
| 635 | observer_->OnBufferedAmountChange(start_buffered_amount); |
| 636 | } |
wu@webrtc.org | d64719d | 2013-08-01 00:00:07 +0000 | [diff] [blame] | 637 | return true; |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 638 | } |
| 639 | |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 640 | void DataChannel::SendQueuedControlMessages() { |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 641 | PacketQueue control_packets; |
| 642 | control_packets.Swap(&queued_control_data_); |
| 643 | |
| 644 | while (!control_packets.Empty()) { |
kwiberg | d1fe281 | 2016-04-27 06:47:29 -0700 | [diff] [blame] | 645 | std::unique_ptr<DataBuffer> buf(control_packets.Front()); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 646 | SendControlMessage(buf->data); |
| 647 | control_packets.Pop(); |
| 648 | } |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 649 | } |
| 650 | |
jbauch | eec21bd | 2016-03-20 06:15:43 -0700 | [diff] [blame] | 651 | void DataChannel::QueueControlMessage(const rtc::CopyOnWriteBuffer& buffer) { |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 652 | queued_control_data_.Push(new DataBuffer(buffer, true)); |
| 653 | } |
| 654 | |
jbauch | eec21bd | 2016-03-20 06:15:43 -0700 | [diff] [blame] | 655 | bool DataChannel::SendControlMessage(const rtc::CopyOnWriteBuffer& buffer) { |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 656 | bool is_open_message = handshake_state_ == kHandshakeShouldSendOpen; |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 657 | |
Bjorn Mellem | 175aa2e | 2018-11-08 11:23:22 -0800 | [diff] [blame] | 658 | RTC_DCHECK(IsSctpLike(data_channel_type_)); |
kwiberg | ee89e78 | 2017-08-09 17:22:01 -0700 | [diff] [blame] | 659 | RTC_DCHECK(writable_); |
| 660 | RTC_DCHECK_GE(config_.id, 0); |
| 661 | RTC_DCHECK(!is_open_message || !config_.negotiated); |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 662 | |
| 663 | cricket::SendDataParams send_params; |
deadbeef | 953c2ce | 2017-01-09 14:53:41 -0800 | [diff] [blame] | 664 | send_params.sid = config_.id; |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 665 | // Send data as ordered before we receive any message from the remote peer to |
| 666 | // make sure the remote peer will not receive any data before it receives the |
| 667 | // OPEN message. |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 668 | send_params.ordered = config_.ordered || is_open_message; |
| 669 | send_params.type = cricket::DMT_CONTROL; |
| 670 | |
| 671 | cricket::SendDataResult send_result = cricket::SDR_SUCCESS; |
| 672 | bool retval = provider_->SendData(send_params, buffer, &send_result); |
| 673 | if (retval) { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 674 | RTC_LOG(LS_INFO) << "Sent CONTROL message on channel " << config_.id; |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 675 | |
Lally Singh | 5c6c6e0 | 2015-05-29 11:52:39 -0400 | [diff] [blame] | 676 | if (handshake_state_ == kHandshakeShouldSendAck) { |
| 677 | handshake_state_ = kHandshakeReady; |
| 678 | } else if (handshake_state_ == kHandshakeShouldSendOpen) { |
| 679 | handshake_state_ = kHandshakeWaitingForAck; |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 680 | } |
| 681 | } else if (send_result == cricket::SDR_BLOCK) { |
| 682 | QueueControlMessage(buffer); |
| 683 | } else { |
Mirko Bonadei | 675513b | 2017-11-09 11:09:25 +0100 | [diff] [blame] | 684 | RTC_LOG(LS_ERROR) << "Closing the DataChannel due to a failure to send" |
Jonas Olsson | 45cc890 | 2018-02-13 10:37:07 +0100 | [diff] [blame] | 685 | " the CONTROL message, send_result = " |
| 686 | << send_result; |
Taylor Brandstetter | cdd05f0 | 2018-05-31 13:23:32 -0700 | [diff] [blame] | 687 | CloseAbruptly(); |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 688 | } |
jiayl@webrtc.org | b43c99d | 2014-06-20 17:11:14 +0000 | [diff] [blame] | 689 | return retval; |
wu@webrtc.org | cecfd18 | 2013-10-30 05:18:12 +0000 | [diff] [blame] | 690 | } |
| 691 | |
henrike@webrtc.org | 28e2075 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 692 | } // namespace webrtc |