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| 1 /* |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 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 |
| 11 #include "webrtc/p2p/base/transport.h" |
| 12 #include "webrtc/p2p/base/transportchannelimpl.h" |
| 13 #include "webrtc/p2p/base/transportchannelproxy.h" |
| 14 #include "webrtc/base/common.h" |
| 15 #include "webrtc/base/logging.h" |
| 16 #include "webrtc/base/thread.h" |
| 17 |
| 18 namespace cricket { |
| 19 |
| 20 enum { |
| 21 MSG_UPDATESTATE, |
| 22 }; |
| 23 |
| 24 TransportChannelProxy::TransportChannelProxy(const std::string& content_name, |
| 25 int component) |
| 26 : TransportChannel(content_name, component), |
| 27 impl_(NULL) { |
| 28 worker_thread_ = rtc::Thread::Current(); |
| 29 } |
| 30 |
| 31 TransportChannelProxy::~TransportChannelProxy() { |
| 32 // Clearing any pending signal. |
| 33 worker_thread_->Clear(this); |
| 34 if (impl_) { |
| 35 impl_->GetTransport()->DestroyChannel(impl_->component()); |
| 36 } |
| 37 } |
| 38 |
| 39 void TransportChannelProxy::SetImplementation(TransportChannelImpl* impl) { |
| 40 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 41 |
| 42 if (impl == impl_) { |
| 43 // Ignore if the |impl| has already been set. |
| 44 LOG(LS_WARNING) << "Ignored TransportChannelProxy::SetImplementation call " |
| 45 << "with a same impl as the existing one."; |
| 46 return; |
| 47 } |
| 48 |
| 49 // Destroy any existing impl_. |
| 50 if (impl_) { |
| 51 impl_->GetTransport()->DestroyChannel(impl_->component()); |
| 52 } |
| 53 |
| 54 // Adopt the supplied impl, and connect to its signals. |
| 55 impl_ = impl; |
| 56 |
| 57 if (impl_) { |
| 58 impl_->SignalWritableState.connect( |
| 59 this, &TransportChannelProxy::OnWritableState); |
| 60 impl_->SignalReceivingState.connect( |
| 61 this, &TransportChannelProxy::OnReceivingState); |
| 62 impl_->SignalReadPacket.connect( |
| 63 this, &TransportChannelProxy::OnReadPacket); |
| 64 impl_->SignalReadyToSend.connect( |
| 65 this, &TransportChannelProxy::OnReadyToSend); |
| 66 impl_->SignalRouteChange.connect( |
| 67 this, &TransportChannelProxy::OnRouteChange); |
| 68 for (const auto& pair : options_) { |
| 69 impl_->SetOption(pair.first, pair.second); |
| 70 } |
| 71 |
| 72 // Push down the SRTP ciphers, if any were set. |
| 73 if (!pending_srtp_ciphers_.empty()) { |
| 74 impl_->SetSrtpCiphers(pending_srtp_ciphers_); |
| 75 } |
| 76 } |
| 77 |
| 78 // Post ourselves a message to see if we need to fire state callbacks. |
| 79 worker_thread_->Post(this, MSG_UPDATESTATE); |
| 80 } |
| 81 |
| 82 int TransportChannelProxy::SendPacket(const char* data, size_t len, |
| 83 const rtc::PacketOptions& options, |
| 84 int flags) { |
| 85 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 86 // Fail if we don't have an impl yet. |
| 87 if (!impl_) { |
| 88 return -1; |
| 89 } |
| 90 return impl_->SendPacket(data, len, options, flags); |
| 91 } |
| 92 |
| 93 int TransportChannelProxy::SetOption(rtc::Socket::Option opt, int value) { |
| 94 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 95 options_.push_back(OptionPair(opt, value)); |
| 96 if (!impl_) { |
| 97 return 0; |
| 98 } |
| 99 return impl_->SetOption(opt, value); |
| 100 } |
| 101 |
| 102 bool TransportChannelProxy::GetOption(rtc::Socket::Option opt, int* value) { |
| 103 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 104 if (impl_) { |
| 105 return impl_->GetOption(opt, value); |
| 106 } |
| 107 |
| 108 for (const auto& pair : options_) { |
| 109 if (pair.first == opt) { |
| 110 *value = pair.second; |
| 111 return true; |
| 112 } |
| 113 } |
| 114 return false; |
| 115 } |
| 116 |
| 117 int TransportChannelProxy::GetError() { |
| 118 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 119 if (!impl_) { |
| 120 return 0; |
| 121 } |
| 122 return impl_->GetError(); |
| 123 } |
| 124 |
| 125 TransportChannelState TransportChannelProxy::GetState() const { |
| 126 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 127 if (!impl_) { |
| 128 return TransportChannelState::STATE_CONNECTING; |
| 129 } |
| 130 return impl_->GetState(); |
| 131 } |
| 132 |
| 133 bool TransportChannelProxy::GetStats(ConnectionInfos* infos) { |
| 134 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 135 if (!impl_) { |
| 136 return false; |
| 137 } |
| 138 return impl_->GetStats(infos); |
| 139 } |
| 140 |
| 141 bool TransportChannelProxy::IsDtlsActive() const { |
| 142 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 143 if (!impl_) { |
| 144 return false; |
| 145 } |
| 146 return impl_->IsDtlsActive(); |
| 147 } |
| 148 |
| 149 bool TransportChannelProxy::GetSslRole(rtc::SSLRole* role) const { |
| 150 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 151 if (!impl_) { |
| 152 return false; |
| 153 } |
| 154 return impl_->GetSslRole(role); |
| 155 } |
| 156 |
| 157 bool TransportChannelProxy::SetSslRole(rtc::SSLRole role) { |
| 158 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 159 if (!impl_) { |
| 160 return false; |
| 161 } |
| 162 return impl_->SetSslRole(role); |
| 163 } |
| 164 |
| 165 bool TransportChannelProxy::SetSrtpCiphers(const std::vector<std::string>& |
| 166 ciphers) { |
| 167 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 168 pending_srtp_ciphers_ = ciphers; // Cache so we can send later, but always |
| 169 // set so it stays consistent. |
| 170 if (impl_) { |
| 171 return impl_->SetSrtpCiphers(ciphers); |
| 172 } |
| 173 return true; |
| 174 } |
| 175 |
| 176 bool TransportChannelProxy::GetSrtpCipher(std::string* cipher) { |
| 177 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 178 if (!impl_) { |
| 179 return false; |
| 180 } |
| 181 return impl_->GetSrtpCipher(cipher); |
| 182 } |
| 183 |
| 184 bool TransportChannelProxy::GetSslCipher(std::string* cipher) { |
| 185 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 186 if (!impl_) { |
| 187 return false; |
| 188 } |
| 189 return impl_->GetSslCipher(cipher); |
| 190 } |
| 191 |
| 192 rtc::scoped_refptr<rtc::RTCCertificate> |
| 193 TransportChannelProxy::GetLocalCertificate() const { |
| 194 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 195 if (!impl_) { |
| 196 return nullptr; |
| 197 } |
| 198 return impl_->GetLocalCertificate(); |
| 199 } |
| 200 |
| 201 bool TransportChannelProxy::GetRemoteSSLCertificate( |
| 202 rtc::SSLCertificate** cert) const { |
| 203 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 204 if (!impl_) { |
| 205 return false; |
| 206 } |
| 207 return impl_->GetRemoteSSLCertificate(cert); |
| 208 } |
| 209 |
| 210 bool TransportChannelProxy::ExportKeyingMaterial(const std::string& label, |
| 211 const uint8* context, |
| 212 size_t context_len, |
| 213 bool use_context, |
| 214 uint8* result, |
| 215 size_t result_len) { |
| 216 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 217 if (!impl_) { |
| 218 return false; |
| 219 } |
| 220 return impl_->ExportKeyingMaterial(label, context, context_len, use_context, |
| 221 result, result_len); |
| 222 } |
| 223 |
| 224 IceRole TransportChannelProxy::GetIceRole() const { |
| 225 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 226 if (!impl_) { |
| 227 return ICEROLE_UNKNOWN; |
| 228 } |
| 229 return impl_->GetIceRole(); |
| 230 } |
| 231 |
| 232 void TransportChannelProxy::OnWritableState(TransportChannel* channel) { |
| 233 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 234 ASSERT(channel == impl_); |
| 235 set_writable(impl_->writable()); |
| 236 // Note: SignalWritableState fired by set_writable. |
| 237 } |
| 238 |
| 239 void TransportChannelProxy::OnReceivingState(TransportChannel* channel) { |
| 240 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 241 ASSERT(channel == impl_); |
| 242 set_receiving(impl_->receiving()); |
| 243 // Note: SignalReceivingState fired by set_receiving. |
| 244 } |
| 245 |
| 246 void TransportChannelProxy::OnReadPacket( |
| 247 TransportChannel* channel, const char* data, size_t size, |
| 248 const rtc::PacketTime& packet_time, int flags) { |
| 249 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 250 ASSERT(channel == impl_); |
| 251 SignalReadPacket(this, data, size, packet_time, flags); |
| 252 } |
| 253 |
| 254 void TransportChannelProxy::OnReadyToSend(TransportChannel* channel) { |
| 255 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 256 ASSERT(channel == impl_); |
| 257 SignalReadyToSend(this); |
| 258 } |
| 259 |
| 260 void TransportChannelProxy::OnRouteChange(TransportChannel* channel, |
| 261 const Candidate& candidate) { |
| 262 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 263 ASSERT(channel == impl_); |
| 264 SignalRouteChange(this, candidate); |
| 265 } |
| 266 |
| 267 void TransportChannelProxy::OnMessage(rtc::Message* msg) { |
| 268 ASSERT(rtc::Thread::Current() == worker_thread_); |
| 269 if (msg->message_id == MSG_UPDATESTATE) { |
| 270 // If impl_ is already receiving or writable, push up those signals. |
| 271 set_writable(impl_ ? impl_->writable() : false); |
| 272 set_receiving(impl_ ? impl_->receiving() : false); |
| 273 } |
| 274 } |
| 275 |
| 276 } // namespace cricket |
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