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| 1 /* | |
| 2 * libjingle | |
| 3 * Copyright 2012 Google Inc. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are met: | |
| 7 * | |
| 8 * 1. Redistributions of source code must retain the above copyright notice, | |
| 9 * this list of conditions and the following disclaimer. | |
| 10 * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 11 * this list of conditions and the following disclaimer in the documentation | |
| 12 * and/or other materials provided with the distribution. | |
| 13 * 3. The name of the author may not be used to endorse or promote products | |
| 14 * derived from this software without specific prior written permission. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
| 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
| 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO | |
| 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #include "talk/app/webrtc/webrtcsession.h" | |
| 29 | |
| 30 #include <limits.h> | |
| 31 | |
| 32 #include <algorithm> | |
| 33 #include <set> | |
| 34 #include <utility> | |
| 35 #include <vector> | |
| 36 | |
| 37 #include "talk/app/webrtc/jsepicecandidate.h" | |
| 38 #include "talk/app/webrtc/jsepsessiondescription.h" | |
| 39 #include "talk/app/webrtc/mediaconstraintsinterface.h" | |
| 40 #include "talk/app/webrtc/peerconnectioninterface.h" | |
| 41 #include "talk/app/webrtc/sctputils.h" | |
| 42 #include "talk/app/webrtc/webrtcsessiondescriptionfactory.h" | |
| 43 #include "talk/session/media/channel.h" | |
| 44 #include "talk/session/media/channelmanager.h" | |
| 45 #include "talk/session/media/mediasession.h" | |
| 46 #include "webrtc/audio/audio_sink.h" | |
| 47 #include "webrtc/base/basictypes.h" | |
| 48 #include "webrtc/base/checks.h" | |
| 49 #include "webrtc/base/helpers.h" | |
| 50 #include "webrtc/base/logging.h" | |
| 51 #include "webrtc/base/stringencode.h" | |
| 52 #include "webrtc/base/stringutils.h" | |
| 53 #include "webrtc/call.h" | |
| 54 #include "webrtc/media/base/constants.h" | |
| 55 #include "webrtc/media/base/videocapturer.h" | |
| 56 #include "webrtc/p2p/base/portallocator.h" | |
| 57 #include "webrtc/p2p/base/transportchannel.h" | |
| 58 | |
| 59 using cricket::ContentInfo; | |
| 60 using cricket::ContentInfos; | |
| 61 using cricket::MediaContentDescription; | |
| 62 using cricket::SessionDescription; | |
| 63 using cricket::TransportInfo; | |
| 64 | |
| 65 using cricket::LOCAL_PORT_TYPE; | |
| 66 using cricket::STUN_PORT_TYPE; | |
| 67 using cricket::RELAY_PORT_TYPE; | |
| 68 using cricket::PRFLX_PORT_TYPE; | |
| 69 | |
| 70 namespace webrtc { | |
| 71 | |
| 72 // Error messages | |
| 73 const char kBundleWithoutRtcpMux[] = "RTCP-MUX must be enabled when BUNDLE " | |
| 74 "is enabled."; | |
| 75 const char kCreateChannelFailed[] = "Failed to create channels."; | |
| 76 const char kInvalidCandidates[] = "Description contains invalid candidates."; | |
| 77 const char kInvalidSdp[] = "Invalid session description."; | |
| 78 const char kMlineMismatch[] = | |
| 79 "Offer and answer descriptions m-lines are not matching. Rejecting answer."; | |
| 80 const char kPushDownTDFailed[] = | |
| 81 "Failed to push down transport description:"; | |
| 82 const char kSdpWithoutDtlsFingerprint[] = | |
| 83 "Called with SDP without DTLS fingerprint."; | |
| 84 const char kSdpWithoutSdesCrypto[] = | |
| 85 "Called with SDP without SDES crypto."; | |
| 86 const char kSdpWithoutIceUfragPwd[] = | |
| 87 "Called with SDP without ice-ufrag and ice-pwd."; | |
| 88 const char kSessionError[] = "Session error code: "; | |
| 89 const char kSessionErrorDesc[] = "Session error description: "; | |
| 90 const char kDtlsSetupFailureRtp[] = | |
| 91 "Couldn't set up DTLS-SRTP on RTP channel."; | |
| 92 const char kDtlsSetupFailureRtcp[] = | |
| 93 "Couldn't set up DTLS-SRTP on RTCP channel."; | |
| 94 const char kEnableBundleFailed[] = "Failed to enable BUNDLE."; | |
| 95 | |
| 96 IceCandidatePairType GetIceCandidatePairCounter( | |
| 97 const cricket::Candidate& local, | |
| 98 const cricket::Candidate& remote) { | |
| 99 const auto& l = local.type(); | |
| 100 const auto& r = remote.type(); | |
| 101 const auto& host = LOCAL_PORT_TYPE; | |
| 102 const auto& srflx = STUN_PORT_TYPE; | |
| 103 const auto& relay = RELAY_PORT_TYPE; | |
| 104 const auto& prflx = PRFLX_PORT_TYPE; | |
| 105 if (l == host && r == host) { | |
| 106 bool local_private = IPIsPrivate(local.address().ipaddr()); | |
| 107 bool remote_private = IPIsPrivate(remote.address().ipaddr()); | |
| 108 if (local_private) { | |
| 109 if (remote_private) { | |
| 110 return kIceCandidatePairHostPrivateHostPrivate; | |
| 111 } else { | |
| 112 return kIceCandidatePairHostPrivateHostPublic; | |
| 113 } | |
| 114 } else { | |
| 115 if (remote_private) { | |
| 116 return kIceCandidatePairHostPublicHostPrivate; | |
| 117 } else { | |
| 118 return kIceCandidatePairHostPublicHostPublic; | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 if (l == host && r == srflx) | |
| 123 return kIceCandidatePairHostSrflx; | |
| 124 if (l == host && r == relay) | |
| 125 return kIceCandidatePairHostRelay; | |
| 126 if (l == host && r == prflx) | |
| 127 return kIceCandidatePairHostPrflx; | |
| 128 if (l == srflx && r == host) | |
| 129 return kIceCandidatePairSrflxHost; | |
| 130 if (l == srflx && r == srflx) | |
| 131 return kIceCandidatePairSrflxSrflx; | |
| 132 if (l == srflx && r == relay) | |
| 133 return kIceCandidatePairSrflxRelay; | |
| 134 if (l == srflx && r == prflx) | |
| 135 return kIceCandidatePairSrflxPrflx; | |
| 136 if (l == relay && r == host) | |
| 137 return kIceCandidatePairRelayHost; | |
| 138 if (l == relay && r == srflx) | |
| 139 return kIceCandidatePairRelaySrflx; | |
| 140 if (l == relay && r == relay) | |
| 141 return kIceCandidatePairRelayRelay; | |
| 142 if (l == relay && r == prflx) | |
| 143 return kIceCandidatePairRelayPrflx; | |
| 144 if (l == prflx && r == host) | |
| 145 return kIceCandidatePairPrflxHost; | |
| 146 if (l == prflx && r == srflx) | |
| 147 return kIceCandidatePairPrflxSrflx; | |
| 148 if (l == prflx && r == relay) | |
| 149 return kIceCandidatePairPrflxRelay; | |
| 150 return kIceCandidatePairMax; | |
| 151 } | |
| 152 | |
| 153 // Compares |answer| against |offer|. Comparision is done | |
| 154 // for number of m-lines in answer against offer. If matches true will be | |
| 155 // returned otherwise false. | |
| 156 static bool VerifyMediaDescriptions( | |
| 157 const SessionDescription* answer, const SessionDescription* offer) { | |
| 158 if (offer->contents().size() != answer->contents().size()) | |
| 159 return false; | |
| 160 | |
| 161 for (size_t i = 0; i < offer->contents().size(); ++i) { | |
| 162 if ((offer->contents()[i].name) != answer->contents()[i].name) { | |
| 163 return false; | |
| 164 } | |
| 165 const MediaContentDescription* offer_mdesc = | |
| 166 static_cast<const MediaContentDescription*>( | |
| 167 offer->contents()[i].description); | |
| 168 const MediaContentDescription* answer_mdesc = | |
| 169 static_cast<const MediaContentDescription*>( | |
| 170 answer->contents()[i].description); | |
| 171 if (offer_mdesc->type() != answer_mdesc->type()) { | |
| 172 return false; | |
| 173 } | |
| 174 } | |
| 175 return true; | |
| 176 } | |
| 177 | |
| 178 // Checks that each non-rejected content has SDES crypto keys or a DTLS | |
| 179 // fingerprint. Mismatches, such as replying with a DTLS fingerprint to SDES | |
| 180 // keys, will be caught in Transport negotiation, and backstopped by Channel's | |
| 181 // |secure_required| check. | |
| 182 static bool VerifyCrypto(const SessionDescription* desc, | |
| 183 bool dtls_enabled, | |
| 184 std::string* error) { | |
| 185 const ContentInfos& contents = desc->contents(); | |
| 186 for (size_t index = 0; index < contents.size(); ++index) { | |
| 187 const ContentInfo* cinfo = &contents[index]; | |
| 188 if (cinfo->rejected) { | |
| 189 continue; | |
| 190 } | |
| 191 | |
| 192 // If the content isn't rejected, crypto must be present. | |
| 193 const MediaContentDescription* media = | |
| 194 static_cast<const MediaContentDescription*>(cinfo->description); | |
| 195 const TransportInfo* tinfo = desc->GetTransportInfoByName(cinfo->name); | |
| 196 if (!media || !tinfo) { | |
| 197 // Something is not right. | |
| 198 LOG(LS_ERROR) << kInvalidSdp; | |
| 199 *error = kInvalidSdp; | |
| 200 return false; | |
| 201 } | |
| 202 if (dtls_enabled) { | |
| 203 if (!tinfo->description.identity_fingerprint) { | |
| 204 LOG(LS_WARNING) << | |
| 205 "Session description must have DTLS fingerprint if DTLS enabled."; | |
| 206 *error = kSdpWithoutDtlsFingerprint; | |
| 207 return false; | |
| 208 } | |
| 209 } else { | |
| 210 if (media->cryptos().empty()) { | |
| 211 LOG(LS_WARNING) << | |
| 212 "Session description must have SDES when DTLS disabled."; | |
| 213 *error = kSdpWithoutSdesCrypto; | |
| 214 return false; | |
| 215 } | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 return true; | |
| 220 } | |
| 221 | |
| 222 // Checks that each non-rejected content has ice-ufrag and ice-pwd set. | |
| 223 static bool VerifyIceUfragPwdPresent(const SessionDescription* desc) { | |
| 224 const ContentInfos& contents = desc->contents(); | |
| 225 for (size_t index = 0; index < contents.size(); ++index) { | |
| 226 const ContentInfo* cinfo = &contents[index]; | |
| 227 if (cinfo->rejected) { | |
| 228 continue; | |
| 229 } | |
| 230 | |
| 231 // If the content isn't rejected, ice-ufrag and ice-pwd must be present. | |
| 232 const TransportInfo* tinfo = desc->GetTransportInfoByName(cinfo->name); | |
| 233 if (!tinfo) { | |
| 234 // Something is not right. | |
| 235 LOG(LS_ERROR) << kInvalidSdp; | |
| 236 return false; | |
| 237 } | |
| 238 if (tinfo->description.ice_ufrag.empty() || | |
| 239 tinfo->description.ice_pwd.empty()) { | |
| 240 LOG(LS_ERROR) << "Session description must have ice ufrag and pwd."; | |
| 241 return false; | |
| 242 } | |
| 243 } | |
| 244 return true; | |
| 245 } | |
| 246 | |
| 247 // Forces |sdesc->crypto_required| to the appropriate state based on the | |
| 248 // current security policy, to ensure a failure occurs if there is an error | |
| 249 // in crypto negotiation. | |
| 250 // Called when processing the local session description. | |
| 251 static void UpdateSessionDescriptionSecurePolicy(cricket::CryptoType type, | |
| 252 SessionDescription* sdesc) { | |
| 253 if (!sdesc) { | |
| 254 return; | |
| 255 } | |
| 256 | |
| 257 // Updating the |crypto_required_| in MediaContentDescription to the | |
| 258 // appropriate state based on the current security policy. | |
| 259 for (cricket::ContentInfos::iterator iter = sdesc->contents().begin(); | |
| 260 iter != sdesc->contents().end(); ++iter) { | |
| 261 if (cricket::IsMediaContent(&*iter)) { | |
| 262 MediaContentDescription* mdesc = | |
| 263 static_cast<MediaContentDescription*> (iter->description); | |
| 264 if (mdesc) { | |
| 265 mdesc->set_crypto_required(type); | |
| 266 } | |
| 267 } | |
| 268 } | |
| 269 } | |
| 270 | |
| 271 static bool GetAudioSsrcByTrackId(const SessionDescription* session_description, | |
| 272 const std::string& track_id, | |
| 273 uint32_t* ssrc) { | |
| 274 const cricket::ContentInfo* audio_info = | |
| 275 cricket::GetFirstAudioContent(session_description); | |
| 276 if (!audio_info) { | |
| 277 LOG(LS_ERROR) << "Audio not used in this call"; | |
| 278 return false; | |
| 279 } | |
| 280 | |
| 281 const cricket::MediaContentDescription* audio_content = | |
| 282 static_cast<const cricket::MediaContentDescription*>( | |
| 283 audio_info->description); | |
| 284 const cricket::StreamParams* stream = | |
| 285 cricket::GetStreamByIds(audio_content->streams(), "", track_id); | |
| 286 if (!stream) { | |
| 287 return false; | |
| 288 } | |
| 289 | |
| 290 *ssrc = stream->first_ssrc(); | |
| 291 return true; | |
| 292 } | |
| 293 | |
| 294 static bool GetTrackIdBySsrc(const SessionDescription* session_description, | |
| 295 uint32_t ssrc, | |
| 296 std::string* track_id) { | |
| 297 ASSERT(track_id != NULL); | |
| 298 | |
| 299 const cricket::ContentInfo* audio_info = | |
| 300 cricket::GetFirstAudioContent(session_description); | |
| 301 if (audio_info) { | |
| 302 const cricket::MediaContentDescription* audio_content = | |
| 303 static_cast<const cricket::MediaContentDescription*>( | |
| 304 audio_info->description); | |
| 305 | |
| 306 const auto* found = | |
| 307 cricket::GetStreamBySsrc(audio_content->streams(), ssrc); | |
| 308 if (found) { | |
| 309 *track_id = found->id; | |
| 310 return true; | |
| 311 } | |
| 312 } | |
| 313 | |
| 314 const cricket::ContentInfo* video_info = | |
| 315 cricket::GetFirstVideoContent(session_description); | |
| 316 if (video_info) { | |
| 317 const cricket::MediaContentDescription* video_content = | |
| 318 static_cast<const cricket::MediaContentDescription*>( | |
| 319 video_info->description); | |
| 320 | |
| 321 const auto* found = | |
| 322 cricket::GetStreamBySsrc(video_content->streams(), ssrc); | |
| 323 if (found) { | |
| 324 *track_id = found->id; | |
| 325 return true; | |
| 326 } | |
| 327 } | |
| 328 return false; | |
| 329 } | |
| 330 | |
| 331 static bool BadSdp(const std::string& source, | |
| 332 const std::string& type, | |
| 333 const std::string& reason, | |
| 334 std::string* err_desc) { | |
| 335 std::ostringstream desc; | |
| 336 desc << "Failed to set " << source; | |
| 337 if (!type.empty()) { | |
| 338 desc << " " << type; | |
| 339 } | |
| 340 desc << " sdp: " << reason; | |
| 341 | |
| 342 if (err_desc) { | |
| 343 *err_desc = desc.str(); | |
| 344 } | |
| 345 LOG(LS_ERROR) << desc.str(); | |
| 346 return false; | |
| 347 } | |
| 348 | |
| 349 static bool BadSdp(cricket::ContentSource source, | |
| 350 const std::string& type, | |
| 351 const std::string& reason, | |
| 352 std::string* err_desc) { | |
| 353 if (source == cricket::CS_LOCAL) { | |
| 354 return BadSdp("local", type, reason, err_desc); | |
| 355 } else { | |
| 356 return BadSdp("remote", type, reason, err_desc); | |
| 357 } | |
| 358 } | |
| 359 | |
| 360 static bool BadLocalSdp(const std::string& type, | |
| 361 const std::string& reason, | |
| 362 std::string* err_desc) { | |
| 363 return BadSdp(cricket::CS_LOCAL, type, reason, err_desc); | |
| 364 } | |
| 365 | |
| 366 static bool BadRemoteSdp(const std::string& type, | |
| 367 const std::string& reason, | |
| 368 std::string* err_desc) { | |
| 369 return BadSdp(cricket::CS_REMOTE, type, reason, err_desc); | |
| 370 } | |
| 371 | |
| 372 static bool BadOfferSdp(cricket::ContentSource source, | |
| 373 const std::string& reason, | |
| 374 std::string* err_desc) { | |
| 375 return BadSdp(source, SessionDescriptionInterface::kOffer, reason, err_desc); | |
| 376 } | |
| 377 | |
| 378 static bool BadPranswerSdp(cricket::ContentSource source, | |
| 379 const std::string& reason, | |
| 380 std::string* err_desc) { | |
| 381 return BadSdp(source, SessionDescriptionInterface::kPrAnswer, | |
| 382 reason, err_desc); | |
| 383 } | |
| 384 | |
| 385 static bool BadAnswerSdp(cricket::ContentSource source, | |
| 386 const std::string& reason, | |
| 387 std::string* err_desc) { | |
| 388 return BadSdp(source, SessionDescriptionInterface::kAnswer, reason, err_desc); | |
| 389 } | |
| 390 | |
| 391 #define GET_STRING_OF_STATE(state) \ | |
| 392 case webrtc::WebRtcSession::state: \ | |
| 393 result = #state; \ | |
| 394 break; | |
| 395 | |
| 396 static std::string GetStateString(webrtc::WebRtcSession::State state) { | |
| 397 std::string result; | |
| 398 switch (state) { | |
| 399 GET_STRING_OF_STATE(STATE_INIT) | |
| 400 GET_STRING_OF_STATE(STATE_SENTOFFER) | |
| 401 GET_STRING_OF_STATE(STATE_RECEIVEDOFFER) | |
| 402 GET_STRING_OF_STATE(STATE_SENTPRANSWER) | |
| 403 GET_STRING_OF_STATE(STATE_RECEIVEDPRANSWER) | |
| 404 GET_STRING_OF_STATE(STATE_INPROGRESS) | |
| 405 GET_STRING_OF_STATE(STATE_CLOSED) | |
| 406 default: | |
| 407 ASSERT(false); | |
| 408 break; | |
| 409 } | |
| 410 return result; | |
| 411 } | |
| 412 | |
| 413 #define GET_STRING_OF_ERROR_CODE(err) \ | |
| 414 case webrtc::WebRtcSession::err: \ | |
| 415 result = #err; \ | |
| 416 break; | |
| 417 | |
| 418 static std::string GetErrorCodeString(webrtc::WebRtcSession::Error err) { | |
| 419 std::string result; | |
| 420 switch (err) { | |
| 421 GET_STRING_OF_ERROR_CODE(ERROR_NONE) | |
| 422 GET_STRING_OF_ERROR_CODE(ERROR_CONTENT) | |
| 423 GET_STRING_OF_ERROR_CODE(ERROR_TRANSPORT) | |
| 424 default: | |
| 425 RTC_DCHECK(false); | |
| 426 break; | |
| 427 } | |
| 428 return result; | |
| 429 } | |
| 430 | |
| 431 static std::string MakeErrorString(const std::string& error, | |
| 432 const std::string& desc) { | |
| 433 std::ostringstream ret; | |
| 434 ret << error << " " << desc; | |
| 435 return ret.str(); | |
| 436 } | |
| 437 | |
| 438 static std::string MakeTdErrorString(const std::string& desc) { | |
| 439 return MakeErrorString(kPushDownTDFailed, desc); | |
| 440 } | |
| 441 | |
| 442 // Set |option| to the highest-priority value of |key| in the optional | |
| 443 // constraints if the key is found and has a valid value. | |
| 444 template <typename T> | |
| 445 static void SetOptionFromOptionalConstraint( | |
| 446 const MediaConstraintsInterface* constraints, | |
| 447 const std::string& key, | |
| 448 rtc::Optional<T>* option) { | |
| 449 if (!constraints) { | |
| 450 return; | |
| 451 } | |
| 452 std::string string_value; | |
| 453 T value; | |
| 454 if (constraints->GetOptional().FindFirst(key, &string_value)) { | |
| 455 if (rtc::FromString(string_value, &value)) { | |
| 456 *option = rtc::Optional<T>(value); | |
| 457 } | |
| 458 } | |
| 459 } | |
| 460 | |
| 461 uint32_t ConvertIceTransportTypeToCandidateFilter( | |
| 462 PeerConnectionInterface::IceTransportsType type) { | |
| 463 switch (type) { | |
| 464 case PeerConnectionInterface::kNone: | |
| 465 return cricket::CF_NONE; | |
| 466 case PeerConnectionInterface::kRelay: | |
| 467 return cricket::CF_RELAY; | |
| 468 case PeerConnectionInterface::kNoHost: | |
| 469 return (cricket::CF_ALL & ~cricket::CF_HOST); | |
| 470 case PeerConnectionInterface::kAll: | |
| 471 return cricket::CF_ALL; | |
| 472 default: ASSERT(false); | |
| 473 } | |
| 474 return cricket::CF_NONE; | |
| 475 } | |
| 476 | |
| 477 // Help class used to remember if a a remote peer has requested ice restart by | |
| 478 // by sending a description with new ice ufrag and password. | |
| 479 class IceRestartAnswerLatch { | |
| 480 public: | |
| 481 IceRestartAnswerLatch() : ice_restart_(false) { } | |
| 482 | |
| 483 // Returns true if CheckForRemoteIceRestart has been called with a new session | |
| 484 // description where ice password and ufrag has changed since last time | |
| 485 // Reset() was called. | |
| 486 bool Get() const { | |
| 487 return ice_restart_; | |
| 488 } | |
| 489 | |
| 490 void Reset() { | |
| 491 if (ice_restart_) { | |
| 492 ice_restart_ = false; | |
| 493 } | |
| 494 } | |
| 495 | |
| 496 // This method has two purposes: 1. Return whether |new_desc| requests | |
| 497 // an ICE restart (i.e., new ufrag/pwd). 2. If it requests an ICE restart | |
| 498 // and it is an OFFER, remember this in |ice_restart_| so that the next | |
| 499 // Local Answer will be created with new ufrag and pwd. | |
| 500 bool CheckForRemoteIceRestart(const SessionDescriptionInterface* old_desc, | |
| 501 const SessionDescriptionInterface* new_desc) { | |
| 502 if (!old_desc) { | |
| 503 return false; | |
| 504 } | |
| 505 const SessionDescription* new_sd = new_desc->description(); | |
| 506 const SessionDescription* old_sd = old_desc->description(); | |
| 507 const ContentInfos& contents = new_sd->contents(); | |
| 508 for (size_t index = 0; index < contents.size(); ++index) { | |
| 509 const ContentInfo* cinfo = &contents[index]; | |
| 510 if (cinfo->rejected) { | |
| 511 continue; | |
| 512 } | |
| 513 // If the content isn't rejected, check if ufrag and password has | |
| 514 // changed. | |
| 515 const cricket::TransportDescription* new_transport_desc = | |
| 516 new_sd->GetTransportDescriptionByName(cinfo->name); | |
| 517 const cricket::TransportDescription* old_transport_desc = | |
| 518 old_sd->GetTransportDescriptionByName(cinfo->name); | |
| 519 if (!new_transport_desc || !old_transport_desc) { | |
| 520 // No transport description exist. This is not an ice restart. | |
| 521 continue; | |
| 522 } | |
| 523 if (cricket::IceCredentialsChanged(old_transport_desc->ice_ufrag, | |
| 524 old_transport_desc->ice_pwd, | |
| 525 new_transport_desc->ice_ufrag, | |
| 526 new_transport_desc->ice_pwd)) { | |
| 527 LOG(LS_INFO) << "Remote peer request ice restart."; | |
| 528 if (new_desc->type() == SessionDescriptionInterface::kOffer) { | |
| 529 ice_restart_ = true; | |
| 530 } | |
| 531 return true; | |
| 532 } | |
| 533 } | |
| 534 return false; | |
| 535 } | |
| 536 | |
| 537 private: | |
| 538 bool ice_restart_; | |
| 539 }; | |
| 540 | |
| 541 WebRtcSession::WebRtcSession(webrtc::MediaControllerInterface* media_controller, | |
| 542 rtc::Thread* signaling_thread, | |
| 543 rtc::Thread* worker_thread, | |
| 544 cricket::PortAllocator* port_allocator) | |
| 545 : signaling_thread_(signaling_thread), | |
| 546 worker_thread_(worker_thread), | |
| 547 port_allocator_(port_allocator), | |
| 548 // RFC 3264: The numeric value of the session id and version in the | |
| 549 // o line MUST be representable with a "64 bit signed integer". | |
| 550 // Due to this constraint session id |sid_| is max limited to LLONG_MAX. | |
| 551 sid_(rtc::ToString(rtc::CreateRandomId64() & LLONG_MAX)), | |
| 552 transport_controller_(new cricket::TransportController(signaling_thread, | |
| 553 worker_thread, | |
| 554 port_allocator)), | |
| 555 media_controller_(media_controller), | |
| 556 channel_manager_(media_controller_->channel_manager()), | |
| 557 ice_observer_(NULL), | |
| 558 ice_connection_state_(PeerConnectionInterface::kIceConnectionNew), | |
| 559 ice_connection_receiving_(true), | |
| 560 older_version_remote_peer_(false), | |
| 561 dtls_enabled_(false), | |
| 562 data_channel_type_(cricket::DCT_NONE), | |
| 563 ice_restart_latch_(new IceRestartAnswerLatch), | |
| 564 metrics_observer_(NULL) { | |
| 565 transport_controller_->SetIceRole(cricket::ICEROLE_CONTROLLED); | |
| 566 transport_controller_->SignalConnectionState.connect( | |
| 567 this, &WebRtcSession::OnTransportControllerConnectionState); | |
| 568 transport_controller_->SignalReceiving.connect( | |
| 569 this, &WebRtcSession::OnTransportControllerReceiving); | |
| 570 transport_controller_->SignalGatheringState.connect( | |
| 571 this, &WebRtcSession::OnTransportControllerGatheringState); | |
| 572 transport_controller_->SignalCandidatesGathered.connect( | |
| 573 this, &WebRtcSession::OnTransportControllerCandidatesGathered); | |
| 574 } | |
| 575 | |
| 576 WebRtcSession::~WebRtcSession() { | |
| 577 ASSERT(signaling_thread()->IsCurrent()); | |
| 578 // Destroy video_channel_ first since it may have a pointer to the | |
| 579 // voice_channel_. | |
| 580 if (video_channel_) { | |
| 581 SignalVideoChannelDestroyed(); | |
| 582 channel_manager_->DestroyVideoChannel(video_channel_.release()); | |
| 583 } | |
| 584 if (voice_channel_) { | |
| 585 SignalVoiceChannelDestroyed(); | |
| 586 channel_manager_->DestroyVoiceChannel(voice_channel_.release()); | |
| 587 } | |
| 588 if (data_channel_) { | |
| 589 SignalDataChannelDestroyed(); | |
| 590 channel_manager_->DestroyDataChannel(data_channel_.release()); | |
| 591 } | |
| 592 SignalDestroyed(); | |
| 593 | |
| 594 LOG(LS_INFO) << "Session: " << id() << " is destroyed."; | |
| 595 } | |
| 596 | |
| 597 bool WebRtcSession::Initialize( | |
| 598 const PeerConnectionFactoryInterface::Options& options, | |
| 599 const MediaConstraintsInterface* constraints, | |
| 600 rtc::scoped_ptr<DtlsIdentityStoreInterface> dtls_identity_store, | |
| 601 const PeerConnectionInterface::RTCConfiguration& rtc_configuration) { | |
| 602 bundle_policy_ = rtc_configuration.bundle_policy; | |
| 603 rtcp_mux_policy_ = rtc_configuration.rtcp_mux_policy; | |
| 604 video_options_.disable_prerenderer_smoothing = | |
| 605 rtc::Optional<bool>(rtc_configuration.disable_prerenderer_smoothing); | |
| 606 transport_controller_->SetSslMaxProtocolVersion(options.ssl_max_version); | |
| 607 | |
| 608 // Obtain a certificate from RTCConfiguration if any were provided (optional). | |
| 609 rtc::scoped_refptr<rtc::RTCCertificate> certificate; | |
| 610 if (!rtc_configuration.certificates.empty()) { | |
| 611 // TODO(hbos,torbjorng): Decide on certificate-selection strategy instead of | |
| 612 // just picking the first one. The decision should be made based on the DTLS | |
| 613 // handshake. The DTLS negotiations need to know about all certificates. | |
| 614 certificate = rtc_configuration.certificates[0]; | |
| 615 } | |
| 616 | |
| 617 SetIceConfig(ParseIceConfig(rtc_configuration)); | |
| 618 | |
| 619 // TODO(perkj): Take |constraints| into consideration. Return false if not all | |
| 620 // mandatory constraints can be fulfilled. Note that |constraints| | |
| 621 // can be null. | |
| 622 bool value; | |
| 623 | |
| 624 if (options.disable_encryption) { | |
| 625 dtls_enabled_ = false; | |
| 626 } else { | |
| 627 // Enable DTLS by default if we have an identity store or a certificate. | |
| 628 dtls_enabled_ = (dtls_identity_store || certificate); | |
| 629 // |constraints| can override the default |dtls_enabled_| value. | |
| 630 if (FindConstraint(constraints, MediaConstraintsInterface::kEnableDtlsSrtp, | |
| 631 &value, nullptr)) { | |
| 632 dtls_enabled_ = value; | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 // Enable creation of RTP data channels if the kEnableRtpDataChannels is set. | |
| 637 // It takes precendence over the disable_sctp_data_channels | |
| 638 // PeerConnectionFactoryInterface::Options. | |
| 639 if (FindConstraint( | |
| 640 constraints, MediaConstraintsInterface::kEnableRtpDataChannels, | |
| 641 &value, NULL) && value) { | |
| 642 LOG(LS_INFO) << "Allowing RTP data engine."; | |
| 643 data_channel_type_ = cricket::DCT_RTP; | |
| 644 } else { | |
| 645 // DTLS has to be enabled to use SCTP. | |
| 646 if (!options.disable_sctp_data_channels && dtls_enabled_) { | |
| 647 LOG(LS_INFO) << "Allowing SCTP data engine."; | |
| 648 data_channel_type_ = cricket::DCT_SCTP; | |
| 649 } | |
| 650 } | |
| 651 | |
| 652 // Find DSCP constraint. | |
| 653 if (FindConstraint( | |
| 654 constraints, | |
| 655 MediaConstraintsInterface::kEnableDscp, | |
| 656 &value, NULL)) { | |
| 657 audio_options_.dscp = rtc::Optional<bool>(value); | |
| 658 video_options_.dscp = rtc::Optional<bool>(value); | |
| 659 } | |
| 660 | |
| 661 // Find Suspend Below Min Bitrate constraint. | |
| 662 if (FindConstraint( | |
| 663 constraints, | |
| 664 MediaConstraintsInterface::kEnableVideoSuspendBelowMinBitrate, | |
| 665 &value, | |
| 666 NULL)) { | |
| 667 video_options_.suspend_below_min_bitrate = rtc::Optional<bool>(value); | |
| 668 } | |
| 669 | |
| 670 SetOptionFromOptionalConstraint(constraints, | |
| 671 MediaConstraintsInterface::kScreencastMinBitrate, | |
| 672 &video_options_.screencast_min_bitrate_kbps); | |
| 673 | |
| 674 // Find constraints for cpu overuse detection. | |
| 675 SetOptionFromOptionalConstraint(constraints, | |
| 676 MediaConstraintsInterface::kCpuOveruseDetection, | |
| 677 &video_options_.cpu_overuse_detection); | |
| 678 | |
| 679 SetOptionFromOptionalConstraint(constraints, | |
| 680 MediaConstraintsInterface::kCombinedAudioVideoBwe, | |
| 681 &audio_options_.combined_audio_video_bwe); | |
| 682 | |
| 683 audio_options_.audio_jitter_buffer_max_packets = | |
| 684 rtc::Optional<int>(rtc_configuration.audio_jitter_buffer_max_packets); | |
| 685 | |
| 686 audio_options_.audio_jitter_buffer_fast_accelerate = rtc::Optional<bool>( | |
| 687 rtc_configuration.audio_jitter_buffer_fast_accelerate); | |
| 688 | |
| 689 if (!dtls_enabled_) { | |
| 690 // Construct with DTLS disabled. | |
| 691 webrtc_session_desc_factory_.reset(new WebRtcSessionDescriptionFactory( | |
| 692 signaling_thread(), channel_manager_, this, id())); | |
| 693 } else { | |
| 694 // Construct with DTLS enabled. | |
| 695 if (!certificate) { | |
| 696 // Use the |dtls_identity_store| to generate a certificate. | |
| 697 RTC_DCHECK(dtls_identity_store); | |
| 698 webrtc_session_desc_factory_.reset(new WebRtcSessionDescriptionFactory( | |
| 699 signaling_thread(), channel_manager_, std::move(dtls_identity_store), | |
| 700 this, id())); | |
| 701 } else { | |
| 702 // Use the already generated certificate. | |
| 703 webrtc_session_desc_factory_.reset(new WebRtcSessionDescriptionFactory( | |
| 704 signaling_thread(), channel_manager_, certificate, this, id())); | |
| 705 } | |
| 706 } | |
| 707 | |
| 708 webrtc_session_desc_factory_->SignalCertificateReady.connect( | |
| 709 this, &WebRtcSession::OnCertificateReady); | |
| 710 | |
| 711 if (options.disable_encryption) { | |
| 712 webrtc_session_desc_factory_->SetSdesPolicy(cricket::SEC_DISABLED); | |
| 713 } | |
| 714 port_allocator()->set_candidate_filter( | |
| 715 ConvertIceTransportTypeToCandidateFilter(rtc_configuration.type)); | |
| 716 | |
| 717 return true; | |
| 718 } | |
| 719 | |
| 720 void WebRtcSession::Close() { | |
| 721 SetState(STATE_CLOSED); | |
| 722 RemoveUnusedChannels(nullptr); | |
| 723 ASSERT(!voice_channel_); | |
| 724 ASSERT(!video_channel_); | |
| 725 ASSERT(!data_channel_); | |
| 726 } | |
| 727 | |
| 728 void WebRtcSession::SetSdesPolicy(cricket::SecurePolicy secure_policy) { | |
| 729 webrtc_session_desc_factory_->SetSdesPolicy(secure_policy); | |
| 730 } | |
| 731 | |
| 732 cricket::SecurePolicy WebRtcSession::SdesPolicy() const { | |
| 733 return webrtc_session_desc_factory_->SdesPolicy(); | |
| 734 } | |
| 735 | |
| 736 bool WebRtcSession::GetSslRole(const std::string& transport_name, | |
| 737 rtc::SSLRole* role) { | |
| 738 if (!local_desc_ || !remote_desc_) { | |
| 739 LOG(LS_INFO) << "Local and Remote descriptions must be applied to get " | |
| 740 << "SSL Role of the session."; | |
| 741 return false; | |
| 742 } | |
| 743 | |
| 744 return transport_controller_->GetSslRole(transport_name, role); | |
| 745 } | |
| 746 | |
| 747 bool WebRtcSession::GetSslRole(const cricket::BaseChannel* channel, | |
| 748 rtc::SSLRole* role) { | |
| 749 return channel && GetSslRole(channel->transport_name(), role); | |
| 750 } | |
| 751 | |
| 752 void WebRtcSession::CreateOffer( | |
| 753 CreateSessionDescriptionObserver* observer, | |
| 754 const PeerConnectionInterface::RTCOfferAnswerOptions& options, | |
| 755 const cricket::MediaSessionOptions& session_options) { | |
| 756 webrtc_session_desc_factory_->CreateOffer(observer, options, session_options); | |
| 757 } | |
| 758 | |
| 759 void WebRtcSession::CreateAnswer( | |
| 760 CreateSessionDescriptionObserver* observer, | |
| 761 const MediaConstraintsInterface* constraints, | |
| 762 const cricket::MediaSessionOptions& session_options) { | |
| 763 webrtc_session_desc_factory_->CreateAnswer(observer, constraints, | |
| 764 session_options); | |
| 765 } | |
| 766 | |
| 767 bool WebRtcSession::SetLocalDescription(SessionDescriptionInterface* desc, | |
| 768 std::string* err_desc) { | |
| 769 ASSERT(signaling_thread()->IsCurrent()); | |
| 770 | |
| 771 // Takes the ownership of |desc| regardless of the result. | |
| 772 rtc::scoped_ptr<SessionDescriptionInterface> desc_temp(desc); | |
| 773 | |
| 774 // Validate SDP. | |
| 775 if (!ValidateSessionDescription(desc, cricket::CS_LOCAL, err_desc)) { | |
| 776 return false; | |
| 777 } | |
| 778 | |
| 779 // Update the initial_offerer flag if this session is the initial_offerer. | |
| 780 Action action = GetAction(desc->type()); | |
| 781 if (state() == STATE_INIT && action == kOffer) { | |
| 782 initial_offerer_ = true; | |
| 783 transport_controller_->SetIceRole(cricket::ICEROLE_CONTROLLING); | |
| 784 } | |
| 785 | |
| 786 cricket::SecurePolicy sdes_policy = | |
| 787 webrtc_session_desc_factory_->SdesPolicy(); | |
| 788 cricket::CryptoType crypto_required = dtls_enabled_ ? | |
| 789 cricket::CT_DTLS : (sdes_policy == cricket::SEC_REQUIRED ? | |
| 790 cricket::CT_SDES : cricket::CT_NONE); | |
| 791 // Update the MediaContentDescription crypto settings as per the policy set. | |
| 792 UpdateSessionDescriptionSecurePolicy(crypto_required, desc->description()); | |
| 793 | |
| 794 local_desc_.reset(desc_temp.release()); | |
| 795 | |
| 796 // Transport and Media channels will be created only when offer is set. | |
| 797 if (action == kOffer && !CreateChannels(local_desc_->description())) { | |
| 798 // TODO(mallinath) - Handle CreateChannel failure, as new local description | |
| 799 // is applied. Restore back to old description. | |
| 800 return BadLocalSdp(desc->type(), kCreateChannelFailed, err_desc); | |
| 801 } | |
| 802 | |
| 803 // Remove unused channels if MediaContentDescription is rejected. | |
| 804 RemoveUnusedChannels(local_desc_->description()); | |
| 805 | |
| 806 if (!UpdateSessionState(action, cricket::CS_LOCAL, err_desc)) { | |
| 807 return false; | |
| 808 } | |
| 809 | |
| 810 if (remote_desc_) { | |
| 811 // Now that we have a local description, we can push down remote candidates. | |
| 812 UseCandidatesInSessionDescription(remote_desc_.get()); | |
| 813 } | |
| 814 | |
| 815 if (error() != ERROR_NONE) { | |
| 816 return BadLocalSdp(desc->type(), GetSessionErrorMsg(), err_desc); | |
| 817 } | |
| 818 return true; | |
| 819 } | |
| 820 | |
| 821 bool WebRtcSession::SetRemoteDescription(SessionDescriptionInterface* desc, | |
| 822 std::string* err_desc) { | |
| 823 ASSERT(signaling_thread()->IsCurrent()); | |
| 824 | |
| 825 // Takes the ownership of |desc| regardless of the result. | |
| 826 rtc::scoped_ptr<SessionDescriptionInterface> desc_temp(desc); | |
| 827 | |
| 828 // Validate SDP. | |
| 829 if (!ValidateSessionDescription(desc, cricket::CS_REMOTE, err_desc)) { | |
| 830 return false; | |
| 831 } | |
| 832 | |
| 833 rtc::scoped_ptr<SessionDescriptionInterface> old_remote_desc( | |
| 834 remote_desc_.release()); | |
| 835 remote_desc_.reset(desc_temp.release()); | |
| 836 | |
| 837 // Transport and Media channels will be created only when offer is set. | |
| 838 Action action = GetAction(desc->type()); | |
| 839 if (action == kOffer && !CreateChannels(desc->description())) { | |
| 840 // TODO(mallinath) - Handle CreateChannel failure, as new local description | |
| 841 // is applied. Restore back to old description. | |
| 842 return BadRemoteSdp(desc->type(), kCreateChannelFailed, err_desc); | |
| 843 } | |
| 844 | |
| 845 // Remove unused channels if MediaContentDescription is rejected. | |
| 846 RemoveUnusedChannels(desc->description()); | |
| 847 | |
| 848 // NOTE: Candidates allocation will be initiated only when SetLocalDescription | |
| 849 // is called. | |
| 850 if (!UpdateSessionState(action, cricket::CS_REMOTE, err_desc)) { | |
| 851 return false; | |
| 852 } | |
| 853 | |
| 854 if (local_desc_ && !UseCandidatesInSessionDescription(desc)) { | |
| 855 return BadRemoteSdp(desc->type(), kInvalidCandidates, err_desc); | |
| 856 } | |
| 857 | |
| 858 // Check if this new SessionDescription contains new ice ufrag and password | |
| 859 // that indicates the remote peer requests ice restart. | |
| 860 bool ice_restart = | |
| 861 ice_restart_latch_->CheckForRemoteIceRestart(old_remote_desc.get(), desc); | |
| 862 // We retain all received candidates only if ICE is not restarted. | |
| 863 // When ICE is restarted, all previous candidates belong to an old generation | |
| 864 // and should not be kept. | |
| 865 // TODO(deadbeef): This goes against the W3C spec which says the remote | |
| 866 // description should only contain candidates from the last set remote | |
| 867 // description plus any candidates added since then. We should remove this | |
| 868 // once we're sure it won't break anything. | |
| 869 if (!ice_restart) { | |
| 870 WebRtcSessionDescriptionFactory::CopyCandidatesFromSessionDescription( | |
| 871 old_remote_desc.get(), desc); | |
| 872 } | |
| 873 | |
| 874 if (error() != ERROR_NONE) { | |
| 875 return BadRemoteSdp(desc->type(), GetSessionErrorMsg(), err_desc); | |
| 876 } | |
| 877 | |
| 878 // Set the the ICE connection state to connecting since the connection may | |
| 879 // become writable with peer reflexive candidates before any remote candidate | |
| 880 // is signaled. | |
| 881 // TODO(pthatcher): This is a short-term solution for crbug/446908. A real fix | |
| 882 // is to have a new signal the indicates a change in checking state from the | |
| 883 // transport and expose a new checking() member from transport that can be | |
| 884 // read to determine the current checking state. The existing SignalConnecting | |
| 885 // actually means "gathering candidates", so cannot be be used here. | |
| 886 if (desc->type() != SessionDescriptionInterface::kOffer && | |
| 887 ice_connection_state_ == PeerConnectionInterface::kIceConnectionNew) { | |
| 888 SetIceConnectionState(PeerConnectionInterface::kIceConnectionChecking); | |
| 889 } | |
| 890 return true; | |
| 891 } | |
| 892 | |
| 893 void WebRtcSession::LogState(State old_state, State new_state) { | |
| 894 LOG(LS_INFO) << "Session:" << id() | |
| 895 << " Old state:" << GetStateString(old_state) | |
| 896 << " New state:" << GetStateString(new_state); | |
| 897 } | |
| 898 | |
| 899 void WebRtcSession::SetState(State state) { | |
| 900 ASSERT(signaling_thread_->IsCurrent()); | |
| 901 if (state != state_) { | |
| 902 LogState(state_, state); | |
| 903 state_ = state; | |
| 904 SignalState(this, state_); | |
| 905 } | |
| 906 } | |
| 907 | |
| 908 void WebRtcSession::SetError(Error error, const std::string& error_desc) { | |
| 909 ASSERT(signaling_thread_->IsCurrent()); | |
| 910 if (error != error_) { | |
| 911 error_ = error; | |
| 912 error_desc_ = error_desc; | |
| 913 } | |
| 914 } | |
| 915 | |
| 916 bool WebRtcSession::UpdateSessionState( | |
| 917 Action action, cricket::ContentSource source, | |
| 918 std::string* err_desc) { | |
| 919 ASSERT(signaling_thread()->IsCurrent()); | |
| 920 | |
| 921 // If there's already a pending error then no state transition should happen. | |
| 922 // But all call-sites should be verifying this before calling us! | |
| 923 ASSERT(error() == ERROR_NONE); | |
| 924 std::string td_err; | |
| 925 if (action == kOffer) { | |
| 926 if (!PushdownTransportDescription(source, cricket::CA_OFFER, &td_err)) { | |
| 927 return BadOfferSdp(source, MakeTdErrorString(td_err), err_desc); | |
| 928 } | |
| 929 SetState(source == cricket::CS_LOCAL ? STATE_SENTOFFER | |
| 930 : STATE_RECEIVEDOFFER); | |
| 931 if (!PushdownMediaDescription(cricket::CA_OFFER, source, err_desc)) { | |
| 932 SetError(ERROR_CONTENT, *err_desc); | |
| 933 } | |
| 934 if (error() != ERROR_NONE) { | |
| 935 return BadOfferSdp(source, GetSessionErrorMsg(), err_desc); | |
| 936 } | |
| 937 } else if (action == kPrAnswer) { | |
| 938 if (!PushdownTransportDescription(source, cricket::CA_PRANSWER, &td_err)) { | |
| 939 return BadPranswerSdp(source, MakeTdErrorString(td_err), err_desc); | |
| 940 } | |
| 941 EnableChannels(); | |
| 942 SetState(source == cricket::CS_LOCAL ? STATE_SENTPRANSWER | |
| 943 : STATE_RECEIVEDPRANSWER); | |
| 944 if (!PushdownMediaDescription(cricket::CA_PRANSWER, source, err_desc)) { | |
| 945 SetError(ERROR_CONTENT, *err_desc); | |
| 946 } | |
| 947 if (error() != ERROR_NONE) { | |
| 948 return BadPranswerSdp(source, GetSessionErrorMsg(), err_desc); | |
| 949 } | |
| 950 } else if (action == kAnswer) { | |
| 951 const cricket::ContentGroup* local_bundle = | |
| 952 local_desc_->description()->GetGroupByName(cricket::GROUP_TYPE_BUNDLE); | |
| 953 const cricket::ContentGroup* remote_bundle = | |
| 954 remote_desc_->description()->GetGroupByName(cricket::GROUP_TYPE_BUNDLE); | |
| 955 if (local_bundle && remote_bundle) { | |
| 956 // The answerer decides the transport to bundle on. | |
| 957 const cricket::ContentGroup* answer_bundle = | |
| 958 (source == cricket::CS_LOCAL ? local_bundle : remote_bundle); | |
| 959 if (!EnableBundle(*answer_bundle)) { | |
| 960 LOG(LS_WARNING) << "Failed to enable BUNDLE."; | |
| 961 return BadAnswerSdp(source, kEnableBundleFailed, err_desc); | |
| 962 } | |
| 963 } | |
| 964 // Only push down the transport description after enabling BUNDLE; we don't | |
| 965 // want to push down a description on a transport about to be destroyed. | |
| 966 if (!PushdownTransportDescription(source, cricket::CA_ANSWER, &td_err)) { | |
| 967 return BadAnswerSdp(source, MakeTdErrorString(td_err), err_desc); | |
| 968 } | |
| 969 EnableChannels(); | |
| 970 SetState(STATE_INPROGRESS); | |
| 971 if (!PushdownMediaDescription(cricket::CA_ANSWER, source, err_desc)) { | |
| 972 SetError(ERROR_CONTENT, *err_desc); | |
| 973 } | |
| 974 if (error() != ERROR_NONE) { | |
| 975 return BadAnswerSdp(source, GetSessionErrorMsg(), err_desc); | |
| 976 } | |
| 977 } | |
| 978 return true; | |
| 979 } | |
| 980 | |
| 981 WebRtcSession::Action WebRtcSession::GetAction(const std::string& type) { | |
| 982 if (type == SessionDescriptionInterface::kOffer) { | |
| 983 return WebRtcSession::kOffer; | |
| 984 } else if (type == SessionDescriptionInterface::kPrAnswer) { | |
| 985 return WebRtcSession::kPrAnswer; | |
| 986 } else if (type == SessionDescriptionInterface::kAnswer) { | |
| 987 return WebRtcSession::kAnswer; | |
| 988 } | |
| 989 ASSERT(false && "unknown action type"); | |
| 990 return WebRtcSession::kOffer; | |
| 991 } | |
| 992 | |
| 993 bool WebRtcSession::PushdownMediaDescription( | |
| 994 cricket::ContentAction action, | |
| 995 cricket::ContentSource source, | |
| 996 std::string* err) { | |
| 997 auto set_content = [this, action, source, err](cricket::BaseChannel* ch) { | |
| 998 if (!ch) { | |
| 999 return true; | |
| 1000 } else if (source == cricket::CS_LOCAL) { | |
| 1001 return ch->PushdownLocalDescription(local_desc_->description(), action, | |
| 1002 err); | |
| 1003 } else { | |
| 1004 return ch->PushdownRemoteDescription(remote_desc_->description(), action, | |
| 1005 err); | |
| 1006 } | |
| 1007 }; | |
| 1008 | |
| 1009 return (set_content(voice_channel()) && | |
| 1010 set_content(video_channel()) && | |
| 1011 set_content(data_channel())); | |
| 1012 } | |
| 1013 | |
| 1014 bool WebRtcSession::PushdownTransportDescription(cricket::ContentSource source, | |
| 1015 cricket::ContentAction action, | |
| 1016 std::string* error_desc) { | |
| 1017 RTC_DCHECK(signaling_thread()->IsCurrent()); | |
| 1018 | |
| 1019 if (source == cricket::CS_LOCAL) { | |
| 1020 return PushdownLocalTransportDescription(local_desc_->description(), action, | |
| 1021 error_desc); | |
| 1022 } | |
| 1023 return PushdownRemoteTransportDescription(remote_desc_->description(), action, | |
| 1024 error_desc); | |
| 1025 } | |
| 1026 | |
| 1027 bool WebRtcSession::PushdownLocalTransportDescription( | |
| 1028 const SessionDescription* sdesc, | |
| 1029 cricket::ContentAction action, | |
| 1030 std::string* err) { | |
| 1031 RTC_DCHECK(signaling_thread()->IsCurrent()); | |
| 1032 | |
| 1033 if (!sdesc) { | |
| 1034 return false; | |
| 1035 } | |
| 1036 | |
| 1037 for (const TransportInfo& tinfo : sdesc->transport_infos()) { | |
| 1038 if (!transport_controller_->SetLocalTransportDescription( | |
| 1039 tinfo.content_name, tinfo.description, action, err)) { | |
| 1040 return false; | |
| 1041 } | |
| 1042 } | |
| 1043 | |
| 1044 return true; | |
| 1045 } | |
| 1046 | |
| 1047 bool WebRtcSession::PushdownRemoteTransportDescription( | |
| 1048 const SessionDescription* sdesc, | |
| 1049 cricket::ContentAction action, | |
| 1050 std::string* err) { | |
| 1051 RTC_DCHECK(signaling_thread()->IsCurrent()); | |
| 1052 | |
| 1053 if (!sdesc) { | |
| 1054 return false; | |
| 1055 } | |
| 1056 | |
| 1057 for (const TransportInfo& tinfo : sdesc->transport_infos()) { | |
| 1058 if (!transport_controller_->SetRemoteTransportDescription( | |
| 1059 tinfo.content_name, tinfo.description, action, err)) { | |
| 1060 return false; | |
| 1061 } | |
| 1062 } | |
| 1063 | |
| 1064 return true; | |
| 1065 } | |
| 1066 | |
| 1067 bool WebRtcSession::GetTransportDescription( | |
| 1068 const SessionDescription* description, | |
| 1069 const std::string& content_name, | |
| 1070 cricket::TransportDescription* tdesc) { | |
| 1071 if (!description || !tdesc) { | |
| 1072 return false; | |
| 1073 } | |
| 1074 const TransportInfo* transport_info = | |
| 1075 description->GetTransportInfoByName(content_name); | |
| 1076 if (!transport_info) { | |
| 1077 return false; | |
| 1078 } | |
| 1079 *tdesc = transport_info->description; | |
| 1080 return true; | |
| 1081 } | |
| 1082 | |
| 1083 bool WebRtcSession::GetTransportStats(SessionStats* stats) { | |
| 1084 ASSERT(signaling_thread()->IsCurrent()); | |
| 1085 return (GetChannelTransportStats(voice_channel(), stats) && | |
| 1086 GetChannelTransportStats(video_channel(), stats) && | |
| 1087 GetChannelTransportStats(data_channel(), stats)); | |
| 1088 } | |
| 1089 | |
| 1090 bool WebRtcSession::GetChannelTransportStats(cricket::BaseChannel* ch, | |
| 1091 SessionStats* stats) { | |
| 1092 ASSERT(signaling_thread()->IsCurrent()); | |
| 1093 if (!ch) { | |
| 1094 // Not using this channel. | |
| 1095 return true; | |
| 1096 } | |
| 1097 | |
| 1098 const std::string& content_name = ch->content_name(); | |
| 1099 const std::string& transport_name = ch->transport_name(); | |
| 1100 stats->proxy_to_transport[content_name] = transport_name; | |
| 1101 if (stats->transport_stats.find(transport_name) != | |
| 1102 stats->transport_stats.end()) { | |
| 1103 // Transport stats already done for this transport. | |
| 1104 return true; | |
| 1105 } | |
| 1106 | |
| 1107 cricket::TransportStats tstats; | |
| 1108 if (!transport_controller_->GetStats(transport_name, &tstats)) { | |
| 1109 return false; | |
| 1110 } | |
| 1111 | |
| 1112 stats->transport_stats[transport_name] = tstats; | |
| 1113 return true; | |
| 1114 } | |
| 1115 | |
| 1116 bool WebRtcSession::GetLocalCertificate( | |
| 1117 const std::string& transport_name, | |
| 1118 rtc::scoped_refptr<rtc::RTCCertificate>* certificate) { | |
| 1119 ASSERT(signaling_thread()->IsCurrent()); | |
| 1120 return transport_controller_->GetLocalCertificate(transport_name, | |
| 1121 certificate); | |
| 1122 } | |
| 1123 | |
| 1124 bool WebRtcSession::GetRemoteSSLCertificate(const std::string& transport_name, | |
| 1125 rtc::SSLCertificate** cert) { | |
| 1126 ASSERT(signaling_thread()->IsCurrent()); | |
| 1127 return transport_controller_->GetRemoteSSLCertificate(transport_name, cert); | |
| 1128 } | |
| 1129 | |
| 1130 cricket::BaseChannel* WebRtcSession::GetChannel( | |
| 1131 const std::string& content_name) { | |
| 1132 if (voice_channel() && voice_channel()->content_name() == content_name) { | |
| 1133 return voice_channel(); | |
| 1134 } | |
| 1135 if (video_channel() && video_channel()->content_name() == content_name) { | |
| 1136 return video_channel(); | |
| 1137 } | |
| 1138 if (data_channel() && data_channel()->content_name() == content_name) { | |
| 1139 return data_channel(); | |
| 1140 } | |
| 1141 return nullptr; | |
| 1142 } | |
| 1143 | |
| 1144 bool WebRtcSession::EnableBundle(const cricket::ContentGroup& bundle) { | |
| 1145 const std::string* first_content_name = bundle.FirstContentName(); | |
| 1146 if (!first_content_name) { | |
| 1147 LOG(LS_WARNING) << "Tried to BUNDLE with no contents."; | |
| 1148 return false; | |
| 1149 } | |
| 1150 const std::string& transport_name = *first_content_name; | |
| 1151 cricket::BaseChannel* first_channel = GetChannel(transport_name); | |
| 1152 | |
| 1153 auto maybe_set_transport = [this, bundle, transport_name, | |
| 1154 first_channel](cricket::BaseChannel* ch) { | |
| 1155 if (!ch || !bundle.HasContentName(ch->content_name())) { | |
| 1156 return true; | |
| 1157 } | |
| 1158 | |
| 1159 if (ch->transport_name() == transport_name) { | |
| 1160 LOG(LS_INFO) << "BUNDLE already enabled for " << ch->content_name() | |
| 1161 << " on " << transport_name << "."; | |
| 1162 return true; | |
| 1163 } | |
| 1164 | |
| 1165 if (!ch->SetTransport(transport_name)) { | |
| 1166 LOG(LS_WARNING) << "Failed to enable BUNDLE for " << ch->content_name(); | |
| 1167 return false; | |
| 1168 } | |
| 1169 LOG(LS_INFO) << "Enabled BUNDLE for " << ch->content_name() << " on " | |
| 1170 << transport_name << "."; | |
| 1171 return true; | |
| 1172 }; | |
| 1173 | |
| 1174 if (!maybe_set_transport(voice_channel()) || | |
| 1175 !maybe_set_transport(video_channel()) || | |
| 1176 !maybe_set_transport(data_channel())) { | |
| 1177 return false; | |
| 1178 } | |
| 1179 | |
| 1180 return true; | |
| 1181 } | |
| 1182 | |
| 1183 bool WebRtcSession::ProcessIceMessage(const IceCandidateInterface* candidate) { | |
| 1184 if (!remote_desc_) { | |
| 1185 LOG(LS_ERROR) << "ProcessIceMessage: ICE candidates can't be added " | |
| 1186 << "without any remote session description."; | |
| 1187 return false; | |
| 1188 } | |
| 1189 | |
| 1190 if (!candidate) { | |
| 1191 LOG(LS_ERROR) << "ProcessIceMessage: Candidate is NULL."; | |
| 1192 return false; | |
| 1193 } | |
| 1194 | |
| 1195 bool valid = false; | |
| 1196 bool ready = ReadyToUseRemoteCandidate(candidate, NULL, &valid); | |
| 1197 if (!valid) { | |
| 1198 return false; | |
| 1199 } | |
| 1200 | |
| 1201 // Add this candidate to the remote session description. | |
| 1202 if (!remote_desc_->AddCandidate(candidate)) { | |
| 1203 LOG(LS_ERROR) << "ProcessIceMessage: Candidate cannot be used."; | |
| 1204 return false; | |
| 1205 } | |
| 1206 | |
| 1207 if (ready) { | |
| 1208 return UseCandidate(candidate); | |
| 1209 } else { | |
| 1210 LOG(LS_INFO) << "ProcessIceMessage: Not ready to use candidate."; | |
| 1211 return true; | |
| 1212 } | |
| 1213 } | |
| 1214 | |
| 1215 bool WebRtcSession::SetIceTransports( | |
| 1216 PeerConnectionInterface::IceTransportsType type) { | |
| 1217 return port_allocator()->set_candidate_filter( | |
| 1218 ConvertIceTransportTypeToCandidateFilter(type)); | |
| 1219 } | |
| 1220 | |
| 1221 cricket::IceConfig WebRtcSession::ParseIceConfig( | |
| 1222 const PeerConnectionInterface::RTCConfiguration& config) const { | |
| 1223 cricket::IceConfig ice_config; | |
| 1224 ice_config.receiving_timeout_ms = config.ice_connection_receiving_timeout; | |
| 1225 ice_config.backup_connection_ping_interval = | |
| 1226 config.ice_backup_candidate_pair_ping_interval; | |
| 1227 ice_config.gather_continually = (config.continual_gathering_policy == | |
| 1228 PeerConnectionInterface::GATHER_CONTINUALLY); | |
| 1229 return ice_config; | |
| 1230 } | |
| 1231 | |
| 1232 void WebRtcSession::SetIceConfig(const cricket::IceConfig& config) { | |
| 1233 transport_controller_->SetIceConfig(config); | |
| 1234 } | |
| 1235 | |
| 1236 void WebRtcSession::MaybeStartGathering() { | |
| 1237 transport_controller_->MaybeStartGathering(); | |
| 1238 } | |
| 1239 | |
| 1240 bool WebRtcSession::GetLocalTrackIdBySsrc(uint32_t ssrc, | |
| 1241 std::string* track_id) { | |
| 1242 if (!local_desc_) { | |
| 1243 return false; | |
| 1244 } | |
| 1245 return webrtc::GetTrackIdBySsrc(local_desc_->description(), ssrc, track_id); | |
| 1246 } | |
| 1247 | |
| 1248 bool WebRtcSession::GetRemoteTrackIdBySsrc(uint32_t ssrc, | |
| 1249 std::string* track_id) { | |
| 1250 if (!remote_desc_) { | |
| 1251 return false; | |
| 1252 } | |
| 1253 return webrtc::GetTrackIdBySsrc(remote_desc_->description(), ssrc, track_id); | |
| 1254 } | |
| 1255 | |
| 1256 std::string WebRtcSession::BadStateErrMsg(State state) { | |
| 1257 std::ostringstream desc; | |
| 1258 desc << "Called in wrong state: " << GetStateString(state); | |
| 1259 return desc.str(); | |
| 1260 } | |
| 1261 | |
| 1262 void WebRtcSession::SetAudioPlayout(uint32_t ssrc, bool enable) { | |
| 1263 ASSERT(signaling_thread()->IsCurrent()); | |
| 1264 if (!voice_channel_) { | |
| 1265 LOG(LS_ERROR) << "SetAudioPlayout: No audio channel exists."; | |
| 1266 return; | |
| 1267 } | |
| 1268 if (!voice_channel_->SetOutputVolume(ssrc, enable ? 1 : 0)) { | |
| 1269 // Allow that SetOutputVolume fail if |enable| is false but assert | |
| 1270 // otherwise. This in the normal case when the underlying media channel has | |
| 1271 // already been deleted. | |
| 1272 ASSERT(enable == false); | |
| 1273 } | |
| 1274 } | |
| 1275 | |
| 1276 void WebRtcSession::SetAudioSend(uint32_t ssrc, | |
| 1277 bool enable, | |
| 1278 const cricket::AudioOptions& options, | |
| 1279 cricket::AudioRenderer* renderer) { | |
| 1280 ASSERT(signaling_thread()->IsCurrent()); | |
| 1281 if (!voice_channel_) { | |
| 1282 LOG(LS_ERROR) << "SetAudioSend: No audio channel exists."; | |
| 1283 return; | |
| 1284 } | |
| 1285 if (!voice_channel_->SetAudioSend(ssrc, enable, &options, renderer)) { | |
| 1286 LOG(LS_ERROR) << "SetAudioSend: ssrc is incorrect: " << ssrc; | |
| 1287 } | |
| 1288 } | |
| 1289 | |
| 1290 void WebRtcSession::SetAudioPlayoutVolume(uint32_t ssrc, double volume) { | |
| 1291 ASSERT(signaling_thread()->IsCurrent()); | |
| 1292 ASSERT(volume >= 0 && volume <= 10); | |
| 1293 if (!voice_channel_) { | |
| 1294 LOG(LS_ERROR) << "SetAudioPlayoutVolume: No audio channel exists."; | |
| 1295 return; | |
| 1296 } | |
| 1297 | |
| 1298 if (!voice_channel_->SetOutputVolume(ssrc, volume)) { | |
| 1299 ASSERT(false); | |
| 1300 } | |
| 1301 } | |
| 1302 | |
| 1303 void WebRtcSession::SetRawAudioSink(uint32_t ssrc, | |
| 1304 rtc::scoped_ptr<AudioSinkInterface> sink) { | |
| 1305 ASSERT(signaling_thread()->IsCurrent()); | |
| 1306 if (!voice_channel_) | |
| 1307 return; | |
| 1308 | |
| 1309 voice_channel_->SetRawAudioSink(ssrc, std::move(sink)); | |
| 1310 } | |
| 1311 | |
| 1312 bool WebRtcSession::SetCaptureDevice(uint32_t ssrc, | |
| 1313 cricket::VideoCapturer* camera) { | |
| 1314 ASSERT(signaling_thread()->IsCurrent()); | |
| 1315 | |
| 1316 if (!video_channel_) { | |
| 1317 // |video_channel_| doesnt't exist. Probably because the remote end doesnt't | |
| 1318 // support video. | |
| 1319 LOG(LS_WARNING) << "Video not used in this call."; | |
| 1320 return false; | |
| 1321 } | |
| 1322 if (!video_channel_->SetCapturer(ssrc, camera)) { | |
| 1323 // Allow that SetCapturer fail if |camera| is NULL but assert otherwise. | |
| 1324 // This in the normal case when the underlying media channel has already | |
| 1325 // been deleted. | |
| 1326 ASSERT(camera == NULL); | |
| 1327 return false; | |
| 1328 } | |
| 1329 return true; | |
| 1330 } | |
| 1331 | |
| 1332 void WebRtcSession::SetVideoPlayout( | |
| 1333 uint32_t ssrc, | |
| 1334 bool enable, | |
| 1335 rtc::VideoSinkInterface<cricket::VideoFrame>* sink) { | |
| 1336 ASSERT(signaling_thread()->IsCurrent()); | |
| 1337 if (!video_channel_) { | |
| 1338 LOG(LS_WARNING) << "SetVideoPlayout: No video channel exists."; | |
| 1339 return; | |
| 1340 } | |
| 1341 if (!video_channel_->SetSink(ssrc, enable ? sink : NULL)) { | |
| 1342 // Allow that SetSink fail if |sink| is NULL but assert otherwise. | |
| 1343 // This in the normal case when the underlying media channel has already | |
| 1344 // been deleted. | |
| 1345 ASSERT(sink == NULL); | |
| 1346 } | |
| 1347 } | |
| 1348 | |
| 1349 void WebRtcSession::SetVideoSend(uint32_t ssrc, | |
| 1350 bool enable, | |
| 1351 const cricket::VideoOptions* options) { | |
| 1352 ASSERT(signaling_thread()->IsCurrent()); | |
| 1353 if (!video_channel_) { | |
| 1354 LOG(LS_WARNING) << "SetVideoSend: No video channel exists."; | |
| 1355 return; | |
| 1356 } | |
| 1357 if (!video_channel_->SetVideoSend(ssrc, enable, options)) { | |
| 1358 // Allow that MuteStream fail if |enable| is false but assert otherwise. | |
| 1359 // This in the normal case when the underlying media channel has already | |
| 1360 // been deleted. | |
| 1361 ASSERT(enable == false); | |
| 1362 } | |
| 1363 } | |
| 1364 | |
| 1365 bool WebRtcSession::CanInsertDtmf(const std::string& track_id) { | |
| 1366 ASSERT(signaling_thread()->IsCurrent()); | |
| 1367 if (!voice_channel_) { | |
| 1368 LOG(LS_ERROR) << "CanInsertDtmf: No audio channel exists."; | |
| 1369 return false; | |
| 1370 } | |
| 1371 uint32_t send_ssrc = 0; | |
| 1372 // The Dtmf is negotiated per channel not ssrc, so we only check if the ssrc | |
| 1373 // exists. | |
| 1374 if (!local_desc_ || | |
| 1375 !GetAudioSsrcByTrackId(local_desc_->description(), track_id, | |
| 1376 &send_ssrc)) { | |
| 1377 LOG(LS_ERROR) << "CanInsertDtmf: Track does not exist: " << track_id; | |
| 1378 return false; | |
| 1379 } | |
| 1380 return voice_channel_->CanInsertDtmf(); | |
| 1381 } | |
| 1382 | |
| 1383 bool WebRtcSession::InsertDtmf(const std::string& track_id, | |
| 1384 int code, int duration) { | |
| 1385 ASSERT(signaling_thread()->IsCurrent()); | |
| 1386 if (!voice_channel_) { | |
| 1387 LOG(LS_ERROR) << "InsertDtmf: No audio channel exists."; | |
| 1388 return false; | |
| 1389 } | |
| 1390 uint32_t send_ssrc = 0; | |
| 1391 if (!VERIFY(local_desc_ && GetAudioSsrcByTrackId(local_desc_->description(), | |
| 1392 track_id, &send_ssrc))) { | |
| 1393 LOG(LS_ERROR) << "InsertDtmf: Track does not exist: " << track_id; | |
| 1394 return false; | |
| 1395 } | |
| 1396 if (!voice_channel_->InsertDtmf(send_ssrc, code, duration)) { | |
| 1397 LOG(LS_ERROR) << "Failed to insert DTMF to channel."; | |
| 1398 return false; | |
| 1399 } | |
| 1400 return true; | |
| 1401 } | |
| 1402 | |
| 1403 sigslot::signal0<>* WebRtcSession::GetOnDestroyedSignal() { | |
| 1404 return &SignalDestroyed; | |
| 1405 } | |
| 1406 | |
| 1407 bool WebRtcSession::SendData(const cricket::SendDataParams& params, | |
| 1408 const rtc::Buffer& payload, | |
| 1409 cricket::SendDataResult* result) { | |
| 1410 if (!data_channel_) { | |
| 1411 LOG(LS_ERROR) << "SendData called when data_channel_ is NULL."; | |
| 1412 return false; | |
| 1413 } | |
| 1414 return data_channel_->SendData(params, payload, result); | |
| 1415 } | |
| 1416 | |
| 1417 bool WebRtcSession::ConnectDataChannel(DataChannel* webrtc_data_channel) { | |
| 1418 if (!data_channel_) { | |
| 1419 LOG(LS_ERROR) << "ConnectDataChannel called when data_channel_ is NULL."; | |
| 1420 return false; | |
| 1421 } | |
| 1422 data_channel_->SignalReadyToSendData.connect(webrtc_data_channel, | |
| 1423 &DataChannel::OnChannelReady); | |
| 1424 data_channel_->SignalDataReceived.connect(webrtc_data_channel, | |
| 1425 &DataChannel::OnDataReceived); | |
| 1426 data_channel_->SignalStreamClosedRemotely.connect( | |
| 1427 webrtc_data_channel, &DataChannel::OnStreamClosedRemotely); | |
| 1428 return true; | |
| 1429 } | |
| 1430 | |
| 1431 void WebRtcSession::DisconnectDataChannel(DataChannel* webrtc_data_channel) { | |
| 1432 if (!data_channel_) { | |
| 1433 LOG(LS_ERROR) << "DisconnectDataChannel called when data_channel_ is NULL."; | |
| 1434 return; | |
| 1435 } | |
| 1436 data_channel_->SignalReadyToSendData.disconnect(webrtc_data_channel); | |
| 1437 data_channel_->SignalDataReceived.disconnect(webrtc_data_channel); | |
| 1438 data_channel_->SignalStreamClosedRemotely.disconnect(webrtc_data_channel); | |
| 1439 } | |
| 1440 | |
| 1441 void WebRtcSession::AddSctpDataStream(int sid) { | |
| 1442 if (!data_channel_) { | |
| 1443 LOG(LS_ERROR) << "AddDataChannelStreams called when data_channel_ is NULL."; | |
| 1444 return; | |
| 1445 } | |
| 1446 data_channel_->AddRecvStream(cricket::StreamParams::CreateLegacy(sid)); | |
| 1447 data_channel_->AddSendStream(cricket::StreamParams::CreateLegacy(sid)); | |
| 1448 } | |
| 1449 | |
| 1450 void WebRtcSession::RemoveSctpDataStream(int sid) { | |
| 1451 if (!data_channel_) { | |
| 1452 LOG(LS_ERROR) << "RemoveDataChannelStreams called when data_channel_ is " | |
| 1453 << "NULL."; | |
| 1454 return; | |
| 1455 } | |
| 1456 data_channel_->RemoveRecvStream(sid); | |
| 1457 data_channel_->RemoveSendStream(sid); | |
| 1458 } | |
| 1459 | |
| 1460 bool WebRtcSession::ReadyToSendData() const { | |
| 1461 return data_channel_ && data_channel_->ready_to_send_data(); | |
| 1462 } | |
| 1463 | |
| 1464 cricket::DataChannelType WebRtcSession::data_channel_type() const { | |
| 1465 return data_channel_type_; | |
| 1466 } | |
| 1467 | |
| 1468 bool WebRtcSession::IceRestartPending() const { | |
| 1469 return ice_restart_latch_->Get(); | |
| 1470 } | |
| 1471 | |
| 1472 void WebRtcSession::ResetIceRestartLatch() { | |
| 1473 ice_restart_latch_->Reset(); | |
| 1474 } | |
| 1475 | |
| 1476 void WebRtcSession::OnCertificateReady( | |
| 1477 const rtc::scoped_refptr<rtc::RTCCertificate>& certificate) { | |
| 1478 transport_controller_->SetLocalCertificate(certificate); | |
| 1479 } | |
| 1480 | |
| 1481 bool WebRtcSession::waiting_for_certificate_for_testing() const { | |
| 1482 return webrtc_session_desc_factory_->waiting_for_certificate_for_testing(); | |
| 1483 } | |
| 1484 | |
| 1485 const rtc::scoped_refptr<rtc::RTCCertificate>& | |
| 1486 WebRtcSession::certificate_for_testing() { | |
| 1487 return transport_controller_->certificate_for_testing(); | |
| 1488 } | |
| 1489 | |
| 1490 void WebRtcSession::SetIceConnectionState( | |
| 1491 PeerConnectionInterface::IceConnectionState state) { | |
| 1492 if (ice_connection_state_ == state) { | |
| 1493 return; | |
| 1494 } | |
| 1495 | |
| 1496 // ASSERT that the requested transition is allowed. Note that | |
| 1497 // WebRtcSession does not implement "kIceConnectionClosed" (that is handled | |
| 1498 // within PeerConnection). This switch statement should compile away when | |
| 1499 // ASSERTs are disabled. | |
| 1500 LOG(LS_INFO) << "Changing IceConnectionState " << ice_connection_state_ | |
| 1501 << " => " << state; | |
| 1502 switch (ice_connection_state_) { | |
| 1503 case PeerConnectionInterface::kIceConnectionNew: | |
| 1504 ASSERT(state == PeerConnectionInterface::kIceConnectionChecking); | |
| 1505 break; | |
| 1506 case PeerConnectionInterface::kIceConnectionChecking: | |
| 1507 ASSERT(state == PeerConnectionInterface::kIceConnectionFailed || | |
| 1508 state == PeerConnectionInterface::kIceConnectionConnected); | |
| 1509 break; | |
| 1510 case PeerConnectionInterface::kIceConnectionConnected: | |
| 1511 ASSERT(state == PeerConnectionInterface::kIceConnectionDisconnected || | |
| 1512 state == PeerConnectionInterface::kIceConnectionChecking || | |
| 1513 state == PeerConnectionInterface::kIceConnectionCompleted); | |
| 1514 break; | |
| 1515 case PeerConnectionInterface::kIceConnectionCompleted: | |
| 1516 ASSERT(state == PeerConnectionInterface::kIceConnectionConnected || | |
| 1517 state == PeerConnectionInterface::kIceConnectionDisconnected); | |
| 1518 break; | |
| 1519 case PeerConnectionInterface::kIceConnectionFailed: | |
| 1520 ASSERT(state == PeerConnectionInterface::kIceConnectionNew); | |
| 1521 break; | |
| 1522 case PeerConnectionInterface::kIceConnectionDisconnected: | |
| 1523 ASSERT(state == PeerConnectionInterface::kIceConnectionChecking || | |
| 1524 state == PeerConnectionInterface::kIceConnectionConnected || | |
| 1525 state == PeerConnectionInterface::kIceConnectionCompleted || | |
| 1526 state == PeerConnectionInterface::kIceConnectionFailed); | |
| 1527 break; | |
| 1528 case PeerConnectionInterface::kIceConnectionClosed: | |
| 1529 ASSERT(false); | |
| 1530 break; | |
| 1531 default: | |
| 1532 ASSERT(false); | |
| 1533 break; | |
| 1534 } | |
| 1535 | |
| 1536 ice_connection_state_ = state; | |
| 1537 if (ice_observer_) { | |
| 1538 ice_observer_->OnIceConnectionChange(ice_connection_state_); | |
| 1539 } | |
| 1540 } | |
| 1541 | |
| 1542 void WebRtcSession::OnTransportControllerConnectionState( | |
| 1543 cricket::IceConnectionState state) { | |
| 1544 switch (state) { | |
| 1545 case cricket::kIceConnectionConnecting: | |
| 1546 // If the current state is Connected or Completed, then there were | |
| 1547 // writable channels but now there are not, so the next state must | |
| 1548 // be Disconnected. | |
| 1549 // kIceConnectionConnecting is currently used as the default, | |
| 1550 // un-connected state by the TransportController, so its only use is | |
| 1551 // detecting disconnections. | |
| 1552 if (ice_connection_state_ == | |
| 1553 PeerConnectionInterface::kIceConnectionConnected || | |
| 1554 ice_connection_state_ == | |
| 1555 PeerConnectionInterface::kIceConnectionCompleted) { | |
| 1556 SetIceConnectionState( | |
| 1557 PeerConnectionInterface::kIceConnectionDisconnected); | |
| 1558 } | |
| 1559 break; | |
| 1560 case cricket::kIceConnectionFailed: | |
| 1561 SetIceConnectionState(PeerConnectionInterface::kIceConnectionFailed); | |
| 1562 break; | |
| 1563 case cricket::kIceConnectionConnected: | |
| 1564 LOG(LS_INFO) << "Changing to ICE connected state because " | |
| 1565 << "all transports are writable."; | |
| 1566 SetIceConnectionState(PeerConnectionInterface::kIceConnectionConnected); | |
| 1567 break; | |
| 1568 case cricket::kIceConnectionCompleted: | |
| 1569 LOG(LS_INFO) << "Changing to ICE completed state because " | |
| 1570 << "all transports are complete."; | |
| 1571 if (ice_connection_state_ != | |
| 1572 PeerConnectionInterface::kIceConnectionConnected) { | |
| 1573 // If jumping directly from "checking" to "connected", | |
| 1574 // signal "connected" first. | |
| 1575 SetIceConnectionState(PeerConnectionInterface::kIceConnectionConnected); | |
| 1576 } | |
| 1577 SetIceConnectionState(PeerConnectionInterface::kIceConnectionCompleted); | |
| 1578 if (metrics_observer_) { | |
| 1579 ReportTransportStats(); | |
| 1580 } | |
| 1581 break; | |
| 1582 default: | |
| 1583 ASSERT(false); | |
| 1584 } | |
| 1585 } | |
| 1586 | |
| 1587 void WebRtcSession::OnTransportControllerReceiving(bool receiving) { | |
| 1588 SetIceConnectionReceiving(receiving); | |
| 1589 } | |
| 1590 | |
| 1591 void WebRtcSession::SetIceConnectionReceiving(bool receiving) { | |
| 1592 if (ice_connection_receiving_ == receiving) { | |
| 1593 return; | |
| 1594 } | |
| 1595 ice_connection_receiving_ = receiving; | |
| 1596 if (ice_observer_) { | |
| 1597 ice_observer_->OnIceConnectionReceivingChange(receiving); | |
| 1598 } | |
| 1599 } | |
| 1600 | |
| 1601 void WebRtcSession::OnTransportControllerCandidatesGathered( | |
| 1602 const std::string& transport_name, | |
| 1603 const cricket::Candidates& candidates) { | |
| 1604 ASSERT(signaling_thread()->IsCurrent()); | |
| 1605 int sdp_mline_index; | |
| 1606 if (!GetLocalCandidateMediaIndex(transport_name, &sdp_mline_index)) { | |
| 1607 LOG(LS_ERROR) << "OnTransportControllerCandidatesGathered: content name " | |
| 1608 << transport_name << " not found"; | |
| 1609 return; | |
| 1610 } | |
| 1611 | |
| 1612 for (cricket::Candidates::const_iterator citer = candidates.begin(); | |
| 1613 citer != candidates.end(); ++citer) { | |
| 1614 // Use transport_name as the candidate media id. | |
| 1615 JsepIceCandidate candidate(transport_name, sdp_mline_index, *citer); | |
| 1616 if (ice_observer_) { | |
| 1617 ice_observer_->OnIceCandidate(&candidate); | |
| 1618 } | |
| 1619 if (local_desc_) { | |
| 1620 local_desc_->AddCandidate(&candidate); | |
| 1621 } | |
| 1622 } | |
| 1623 } | |
| 1624 | |
| 1625 // Enabling voice and video channel. | |
| 1626 void WebRtcSession::EnableChannels() { | |
| 1627 if (voice_channel_ && !voice_channel_->enabled()) | |
| 1628 voice_channel_->Enable(true); | |
| 1629 | |
| 1630 if (video_channel_ && !video_channel_->enabled()) | |
| 1631 video_channel_->Enable(true); | |
| 1632 | |
| 1633 if (data_channel_ && !data_channel_->enabled()) | |
| 1634 data_channel_->Enable(true); | |
| 1635 } | |
| 1636 | |
| 1637 // Returns the media index for a local ice candidate given the content name. | |
| 1638 bool WebRtcSession::GetLocalCandidateMediaIndex(const std::string& content_name, | |
| 1639 int* sdp_mline_index) { | |
| 1640 if (!local_desc_ || !sdp_mline_index) { | |
| 1641 return false; | |
| 1642 } | |
| 1643 | |
| 1644 bool content_found = false; | |
| 1645 const ContentInfos& contents = local_desc_->description()->contents(); | |
| 1646 for (size_t index = 0; index < contents.size(); ++index) { | |
| 1647 if (contents[index].name == content_name) { | |
| 1648 *sdp_mline_index = static_cast<int>(index); | |
| 1649 content_found = true; | |
| 1650 break; | |
| 1651 } | |
| 1652 } | |
| 1653 return content_found; | |
| 1654 } | |
| 1655 | |
| 1656 bool WebRtcSession::UseCandidatesInSessionDescription( | |
| 1657 const SessionDescriptionInterface* remote_desc) { | |
| 1658 if (!remote_desc) { | |
| 1659 return true; | |
| 1660 } | |
| 1661 bool ret = true; | |
| 1662 | |
| 1663 for (size_t m = 0; m < remote_desc->number_of_mediasections(); ++m) { | |
| 1664 const IceCandidateCollection* candidates = remote_desc->candidates(m); | |
| 1665 for (size_t n = 0; n < candidates->count(); ++n) { | |
| 1666 const IceCandidateInterface* candidate = candidates->at(n); | |
| 1667 bool valid = false; | |
| 1668 if (!ReadyToUseRemoteCandidate(candidate, remote_desc, &valid)) { | |
| 1669 if (valid) { | |
| 1670 LOG(LS_INFO) << "UseCandidatesInSessionDescription: Not ready to use " | |
| 1671 << "candidate."; | |
| 1672 } | |
| 1673 continue; | |
| 1674 } | |
| 1675 ret = UseCandidate(candidate); | |
| 1676 if (!ret) { | |
| 1677 break; | |
| 1678 } | |
| 1679 } | |
| 1680 } | |
| 1681 return ret; | |
| 1682 } | |
| 1683 | |
| 1684 bool WebRtcSession::UseCandidate( | |
| 1685 const IceCandidateInterface* candidate) { | |
| 1686 | |
| 1687 size_t mediacontent_index = static_cast<size_t>(candidate->sdp_mline_index()); | |
| 1688 size_t remote_content_size = remote_desc_->description()->contents().size(); | |
| 1689 if (mediacontent_index >= remote_content_size) { | |
| 1690 LOG(LS_ERROR) | |
| 1691 << "UseRemoteCandidateInSession: Invalid candidate media index."; | |
| 1692 return false; | |
| 1693 } | |
| 1694 | |
| 1695 cricket::ContentInfo content = | |
| 1696 remote_desc_->description()->contents()[mediacontent_index]; | |
| 1697 std::vector<cricket::Candidate> candidates; | |
| 1698 candidates.push_back(candidate->candidate()); | |
| 1699 // Invoking BaseSession method to handle remote candidates. | |
| 1700 std::string error; | |
| 1701 if (transport_controller_->AddRemoteCandidates(content.name, candidates, | |
| 1702 &error)) { | |
| 1703 // Candidates successfully submitted for checking. | |
| 1704 if (ice_connection_state_ == PeerConnectionInterface::kIceConnectionNew || | |
| 1705 ice_connection_state_ == | |
| 1706 PeerConnectionInterface::kIceConnectionDisconnected) { | |
| 1707 // If state is New, then the session has just gotten its first remote ICE | |
| 1708 // candidates, so go to Checking. | |
| 1709 // If state is Disconnected, the session is re-using old candidates or | |
| 1710 // receiving additional ones, so go to Checking. | |
| 1711 // If state is Connected, stay Connected. | |
| 1712 // TODO(bemasc): If state is Connected, and the new candidates are for a | |
| 1713 // newly added transport, then the state actually _should_ move to | |
| 1714 // checking. Add a way to distinguish that case. | |
| 1715 SetIceConnectionState(PeerConnectionInterface::kIceConnectionChecking); | |
| 1716 } | |
| 1717 // TODO(bemasc): If state is Completed, go back to Connected. | |
| 1718 } else { | |
| 1719 if (!error.empty()) { | |
| 1720 LOG(LS_WARNING) << error; | |
| 1721 } | |
| 1722 } | |
| 1723 return true; | |
| 1724 } | |
| 1725 | |
| 1726 void WebRtcSession::RemoveUnusedChannels(const SessionDescription* desc) { | |
| 1727 // Destroy video_channel_ first since it may have a pointer to the | |
| 1728 // voice_channel_. | |
| 1729 const cricket::ContentInfo* video_info = | |
| 1730 cricket::GetFirstVideoContent(desc); | |
| 1731 if ((!video_info || video_info->rejected) && video_channel_) { | |
| 1732 SignalVideoChannelDestroyed(); | |
| 1733 channel_manager_->DestroyVideoChannel(video_channel_.release()); | |
| 1734 } | |
| 1735 | |
| 1736 const cricket::ContentInfo* voice_info = | |
| 1737 cricket::GetFirstAudioContent(desc); | |
| 1738 if ((!voice_info || voice_info->rejected) && voice_channel_) { | |
| 1739 SignalVoiceChannelDestroyed(); | |
| 1740 channel_manager_->DestroyVoiceChannel(voice_channel_.release()); | |
| 1741 } | |
| 1742 | |
| 1743 const cricket::ContentInfo* data_info = | |
| 1744 cricket::GetFirstDataContent(desc); | |
| 1745 if ((!data_info || data_info->rejected) && data_channel_) { | |
| 1746 SignalDataChannelDestroyed(); | |
| 1747 channel_manager_->DestroyDataChannel(data_channel_.release()); | |
| 1748 } | |
| 1749 } | |
| 1750 | |
| 1751 // TODO(mallinath) - Add a correct error code if the channels are not created | |
| 1752 // due to BUNDLE is enabled but rtcp-mux is disabled. | |
| 1753 bool WebRtcSession::CreateChannels(const SessionDescription* desc) { | |
| 1754 // Creating the media channels and transport proxies. | |
| 1755 const cricket::ContentInfo* voice = cricket::GetFirstAudioContent(desc); | |
| 1756 if (voice && !voice->rejected && !voice_channel_) { | |
| 1757 if (!CreateVoiceChannel(voice)) { | |
| 1758 LOG(LS_ERROR) << "Failed to create voice channel."; | |
| 1759 return false; | |
| 1760 } | |
| 1761 } | |
| 1762 | |
| 1763 const cricket::ContentInfo* video = cricket::GetFirstVideoContent(desc); | |
| 1764 if (video && !video->rejected && !video_channel_) { | |
| 1765 if (!CreateVideoChannel(video)) { | |
| 1766 LOG(LS_ERROR) << "Failed to create video channel."; | |
| 1767 return false; | |
| 1768 } | |
| 1769 } | |
| 1770 | |
| 1771 const cricket::ContentInfo* data = cricket::GetFirstDataContent(desc); | |
| 1772 if (data_channel_type_ != cricket::DCT_NONE && | |
| 1773 data && !data->rejected && !data_channel_) { | |
| 1774 if (!CreateDataChannel(data)) { | |
| 1775 LOG(LS_ERROR) << "Failed to create data channel."; | |
| 1776 return false; | |
| 1777 } | |
| 1778 } | |
| 1779 | |
| 1780 if (rtcp_mux_policy_ == PeerConnectionInterface::kRtcpMuxPolicyRequire) { | |
| 1781 if (voice_channel()) { | |
| 1782 voice_channel()->ActivateRtcpMux(); | |
| 1783 } | |
| 1784 if (video_channel()) { | |
| 1785 video_channel()->ActivateRtcpMux(); | |
| 1786 } | |
| 1787 if (data_channel()) { | |
| 1788 data_channel()->ActivateRtcpMux(); | |
| 1789 } | |
| 1790 } | |
| 1791 | |
| 1792 // Enable BUNDLE immediately when kBundlePolicyMaxBundle is in effect. | |
| 1793 if (bundle_policy_ == PeerConnectionInterface::kBundlePolicyMaxBundle) { | |
| 1794 const cricket::ContentGroup* bundle_group = desc->GetGroupByName( | |
| 1795 cricket::GROUP_TYPE_BUNDLE); | |
| 1796 if (!bundle_group) { | |
| 1797 LOG(LS_WARNING) << "max-bundle specified without BUNDLE specified"; | |
| 1798 return false; | |
| 1799 } | |
| 1800 if (!EnableBundle(*bundle_group)) { | |
| 1801 LOG(LS_WARNING) << "max-bundle failed to enable bundling."; | |
| 1802 return false; | |
| 1803 } | |
| 1804 } | |
| 1805 | |
| 1806 return true; | |
| 1807 } | |
| 1808 | |
| 1809 bool WebRtcSession::CreateVoiceChannel(const cricket::ContentInfo* content) { | |
| 1810 voice_channel_.reset(channel_manager_->CreateVoiceChannel( | |
| 1811 media_controller_, transport_controller_.get(), content->name, true, | |
| 1812 audio_options_)); | |
| 1813 if (!voice_channel_) { | |
| 1814 return false; | |
| 1815 } | |
| 1816 | |
| 1817 voice_channel_->SignalDtlsSetupFailure.connect( | |
| 1818 this, &WebRtcSession::OnDtlsSetupFailure); | |
| 1819 | |
| 1820 SignalVoiceChannelCreated(); | |
| 1821 voice_channel_->transport_channel()->SignalSentPacket.connect( | |
| 1822 this, &WebRtcSession::OnSentPacket_w); | |
| 1823 return true; | |
| 1824 } | |
| 1825 | |
| 1826 bool WebRtcSession::CreateVideoChannel(const cricket::ContentInfo* content) { | |
| 1827 video_channel_.reset(channel_manager_->CreateVideoChannel( | |
| 1828 media_controller_, transport_controller_.get(), content->name, true, | |
| 1829 video_options_)); | |
| 1830 if (!video_channel_) { | |
| 1831 return false; | |
| 1832 } | |
| 1833 | |
| 1834 video_channel_->SignalDtlsSetupFailure.connect( | |
| 1835 this, &WebRtcSession::OnDtlsSetupFailure); | |
| 1836 | |
| 1837 SignalVideoChannelCreated(); | |
| 1838 video_channel_->transport_channel()->SignalSentPacket.connect( | |
| 1839 this, &WebRtcSession::OnSentPacket_w); | |
| 1840 return true; | |
| 1841 } | |
| 1842 | |
| 1843 bool WebRtcSession::CreateDataChannel(const cricket::ContentInfo* content) { | |
| 1844 bool sctp = (data_channel_type_ == cricket::DCT_SCTP); | |
| 1845 data_channel_.reset(channel_manager_->CreateDataChannel( | |
| 1846 transport_controller_.get(), content->name, !sctp, data_channel_type_)); | |
| 1847 if (!data_channel_) { | |
| 1848 return false; | |
| 1849 } | |
| 1850 | |
| 1851 if (sctp) { | |
| 1852 data_channel_->SignalDataReceived.connect( | |
| 1853 this, &WebRtcSession::OnDataChannelMessageReceived); | |
| 1854 } | |
| 1855 | |
| 1856 data_channel_->SignalDtlsSetupFailure.connect( | |
| 1857 this, &WebRtcSession::OnDtlsSetupFailure); | |
| 1858 | |
| 1859 SignalDataChannelCreated(); | |
| 1860 data_channel_->transport_channel()->SignalSentPacket.connect( | |
| 1861 this, &WebRtcSession::OnSentPacket_w); | |
| 1862 return true; | |
| 1863 } | |
| 1864 | |
| 1865 void WebRtcSession::OnDtlsSetupFailure(cricket::BaseChannel*, bool rtcp) { | |
| 1866 SetError(ERROR_TRANSPORT, | |
| 1867 rtcp ? kDtlsSetupFailureRtcp : kDtlsSetupFailureRtp); | |
| 1868 } | |
| 1869 | |
| 1870 void WebRtcSession::OnDataChannelMessageReceived( | |
| 1871 cricket::DataChannel* channel, | |
| 1872 const cricket::ReceiveDataParams& params, | |
| 1873 const rtc::Buffer& payload) { | |
| 1874 RTC_DCHECK(data_channel_type_ == cricket::DCT_SCTP); | |
| 1875 if (params.type == cricket::DMT_CONTROL && IsOpenMessage(payload)) { | |
| 1876 // Received OPEN message; parse and signal that a new data channel should | |
| 1877 // be created. | |
| 1878 std::string label; | |
| 1879 InternalDataChannelInit config; | |
| 1880 config.id = params.ssrc; | |
| 1881 if (!ParseDataChannelOpenMessage(payload, &label, &config)) { | |
| 1882 LOG(LS_WARNING) << "Failed to parse the OPEN message for sid " | |
| 1883 << params.ssrc; | |
| 1884 return; | |
| 1885 } | |
| 1886 config.open_handshake_role = InternalDataChannelInit::kAcker; | |
| 1887 SignalDataChannelOpenMessage(label, config); | |
| 1888 } | |
| 1889 // Otherwise ignore the message. | |
| 1890 } | |
| 1891 | |
| 1892 // Returns false if bundle is enabled and rtcp_mux is disabled. | |
| 1893 bool WebRtcSession::ValidateBundleSettings(const SessionDescription* desc) { | |
| 1894 bool bundle_enabled = desc->HasGroup(cricket::GROUP_TYPE_BUNDLE); | |
| 1895 if (!bundle_enabled) | |
| 1896 return true; | |
| 1897 | |
| 1898 const cricket::ContentGroup* bundle_group = | |
| 1899 desc->GetGroupByName(cricket::GROUP_TYPE_BUNDLE); | |
| 1900 ASSERT(bundle_group != NULL); | |
| 1901 | |
| 1902 const cricket::ContentInfos& contents = desc->contents(); | |
| 1903 for (cricket::ContentInfos::const_iterator citer = contents.begin(); | |
| 1904 citer != contents.end(); ++citer) { | |
| 1905 const cricket::ContentInfo* content = (&*citer); | |
| 1906 ASSERT(content != NULL); | |
| 1907 if (bundle_group->HasContentName(content->name) && | |
| 1908 !content->rejected && content->type == cricket::NS_JINGLE_RTP) { | |
| 1909 if (!HasRtcpMuxEnabled(content)) | |
| 1910 return false; | |
| 1911 } | |
| 1912 } | |
| 1913 // RTCP-MUX is enabled in all the contents. | |
| 1914 return true; | |
| 1915 } | |
| 1916 | |
| 1917 bool WebRtcSession::HasRtcpMuxEnabled( | |
| 1918 const cricket::ContentInfo* content) { | |
| 1919 const cricket::MediaContentDescription* description = | |
| 1920 static_cast<cricket::MediaContentDescription*>(content->description); | |
| 1921 return description->rtcp_mux(); | |
| 1922 } | |
| 1923 | |
| 1924 bool WebRtcSession::ValidateSessionDescription( | |
| 1925 const SessionDescriptionInterface* sdesc, | |
| 1926 cricket::ContentSource source, std::string* err_desc) { | |
| 1927 std::string type; | |
| 1928 if (error() != ERROR_NONE) { | |
| 1929 return BadSdp(source, type, GetSessionErrorMsg(), err_desc); | |
| 1930 } | |
| 1931 | |
| 1932 if (!sdesc || !sdesc->description()) { | |
| 1933 return BadSdp(source, type, kInvalidSdp, err_desc); | |
| 1934 } | |
| 1935 | |
| 1936 type = sdesc->type(); | |
| 1937 Action action = GetAction(sdesc->type()); | |
| 1938 if (source == cricket::CS_LOCAL) { | |
| 1939 if (!ExpectSetLocalDescription(action)) | |
| 1940 return BadLocalSdp(type, BadStateErrMsg(state()), err_desc); | |
| 1941 } else { | |
| 1942 if (!ExpectSetRemoteDescription(action)) | |
| 1943 return BadRemoteSdp(type, BadStateErrMsg(state()), err_desc); | |
| 1944 } | |
| 1945 | |
| 1946 // Verify crypto settings. | |
| 1947 std::string crypto_error; | |
| 1948 if ((webrtc_session_desc_factory_->SdesPolicy() == cricket::SEC_REQUIRED || | |
| 1949 dtls_enabled_) && | |
| 1950 !VerifyCrypto(sdesc->description(), dtls_enabled_, &crypto_error)) { | |
| 1951 return BadSdp(source, type, crypto_error, err_desc); | |
| 1952 } | |
| 1953 | |
| 1954 // Verify ice-ufrag and ice-pwd. | |
| 1955 if (!VerifyIceUfragPwdPresent(sdesc->description())) { | |
| 1956 return BadSdp(source, type, kSdpWithoutIceUfragPwd, err_desc); | |
| 1957 } | |
| 1958 | |
| 1959 if (!ValidateBundleSettings(sdesc->description())) { | |
| 1960 return BadSdp(source, type, kBundleWithoutRtcpMux, err_desc); | |
| 1961 } | |
| 1962 | |
| 1963 // Verify m-lines in Answer when compared against Offer. | |
| 1964 if (action == kAnswer) { | |
| 1965 const cricket::SessionDescription* offer_desc = | |
| 1966 (source == cricket::CS_LOCAL) ? remote_desc_->description() | |
| 1967 : local_desc_->description(); | |
| 1968 if (!VerifyMediaDescriptions(sdesc->description(), offer_desc)) { | |
| 1969 return BadAnswerSdp(source, kMlineMismatch, err_desc); | |
| 1970 } | |
| 1971 } | |
| 1972 | |
| 1973 return true; | |
| 1974 } | |
| 1975 | |
| 1976 bool WebRtcSession::ExpectSetLocalDescription(Action action) { | |
| 1977 return ((action == kOffer && state() == STATE_INIT) || | |
| 1978 // update local offer | |
| 1979 (action == kOffer && state() == STATE_SENTOFFER) || | |
| 1980 // update the current ongoing session. | |
| 1981 (action == kOffer && state() == STATE_INPROGRESS) || | |
| 1982 // accept remote offer | |
| 1983 (action == kAnswer && state() == STATE_RECEIVEDOFFER) || | |
| 1984 (action == kAnswer && state() == STATE_SENTPRANSWER) || | |
| 1985 (action == kPrAnswer && state() == STATE_RECEIVEDOFFER) || | |
| 1986 (action == kPrAnswer && state() == STATE_SENTPRANSWER)); | |
| 1987 } | |
| 1988 | |
| 1989 bool WebRtcSession::ExpectSetRemoteDescription(Action action) { | |
| 1990 return ((action == kOffer && state() == STATE_INIT) || | |
| 1991 // update remote offer | |
| 1992 (action == kOffer && state() == STATE_RECEIVEDOFFER) || | |
| 1993 // update the current ongoing session | |
| 1994 (action == kOffer && state() == STATE_INPROGRESS) || | |
| 1995 // accept local offer | |
| 1996 (action == kAnswer && state() == STATE_SENTOFFER) || | |
| 1997 (action == kAnswer && state() == STATE_RECEIVEDPRANSWER) || | |
| 1998 (action == kPrAnswer && state() == STATE_SENTOFFER) || | |
| 1999 (action == kPrAnswer && state() == STATE_RECEIVEDPRANSWER)); | |
| 2000 } | |
| 2001 | |
| 2002 std::string WebRtcSession::GetSessionErrorMsg() { | |
| 2003 std::ostringstream desc; | |
| 2004 desc << kSessionError << GetErrorCodeString(error()) << ". "; | |
| 2005 desc << kSessionErrorDesc << error_desc() << "."; | |
| 2006 return desc.str(); | |
| 2007 } | |
| 2008 | |
| 2009 // We need to check the local/remote description for the Transport instead of | |
| 2010 // the session, because a new Transport added during renegotiation may have | |
| 2011 // them unset while the session has them set from the previous negotiation. | |
| 2012 // Not doing so may trigger the auto generation of transport description and | |
| 2013 // mess up DTLS identity information, ICE credential, etc. | |
| 2014 bool WebRtcSession::ReadyToUseRemoteCandidate( | |
| 2015 const IceCandidateInterface* candidate, | |
| 2016 const SessionDescriptionInterface* remote_desc, | |
| 2017 bool* valid) { | |
| 2018 *valid = true;; | |
| 2019 | |
| 2020 const SessionDescriptionInterface* current_remote_desc = | |
| 2021 remote_desc ? remote_desc : remote_desc_.get(); | |
| 2022 | |
| 2023 if (!current_remote_desc) { | |
| 2024 return false; | |
| 2025 } | |
| 2026 | |
| 2027 size_t mediacontent_index = | |
| 2028 static_cast<size_t>(candidate->sdp_mline_index()); | |
| 2029 size_t remote_content_size = | |
| 2030 current_remote_desc->description()->contents().size(); | |
| 2031 if (mediacontent_index >= remote_content_size) { | |
| 2032 LOG(LS_ERROR) | |
| 2033 << "ReadyToUseRemoteCandidate: Invalid candidate media index."; | |
| 2034 | |
| 2035 *valid = false; | |
| 2036 return false; | |
| 2037 } | |
| 2038 | |
| 2039 cricket::ContentInfo content = | |
| 2040 current_remote_desc->description()->contents()[mediacontent_index]; | |
| 2041 cricket::BaseChannel* channel = GetChannel(content.name); | |
| 2042 if (!channel) { | |
| 2043 return false; | |
| 2044 } | |
| 2045 | |
| 2046 return transport_controller_->ReadyForRemoteCandidates( | |
| 2047 channel->transport_name()); | |
| 2048 } | |
| 2049 | |
| 2050 void WebRtcSession::OnTransportControllerGatheringState( | |
| 2051 cricket::IceGatheringState state) { | |
| 2052 ASSERT(signaling_thread()->IsCurrent()); | |
| 2053 if (state == cricket::kIceGatheringGathering) { | |
| 2054 if (ice_observer_) { | |
| 2055 ice_observer_->OnIceGatheringChange( | |
| 2056 PeerConnectionInterface::kIceGatheringGathering); | |
| 2057 } | |
| 2058 } else if (state == cricket::kIceGatheringComplete) { | |
| 2059 if (ice_observer_) { | |
| 2060 ice_observer_->OnIceGatheringChange( | |
| 2061 PeerConnectionInterface::kIceGatheringComplete); | |
| 2062 } | |
| 2063 } | |
| 2064 } | |
| 2065 | |
| 2066 void WebRtcSession::ReportTransportStats() { | |
| 2067 // Use a set so we don't report the same stats twice if two channels share | |
| 2068 // a transport. | |
| 2069 std::set<std::string> transport_names; | |
| 2070 if (voice_channel()) { | |
| 2071 transport_names.insert(voice_channel()->transport_name()); | |
| 2072 } | |
| 2073 if (video_channel()) { | |
| 2074 transport_names.insert(video_channel()->transport_name()); | |
| 2075 } | |
| 2076 if (data_channel()) { | |
| 2077 transport_names.insert(data_channel()->transport_name()); | |
| 2078 } | |
| 2079 for (const auto& name : transport_names) { | |
| 2080 cricket::TransportStats stats; | |
| 2081 if (transport_controller_->GetStats(name, &stats)) { | |
| 2082 ReportBestConnectionState(stats); | |
| 2083 ReportNegotiatedCiphers(stats); | |
| 2084 } | |
| 2085 } | |
| 2086 } | |
| 2087 // Walk through the ConnectionInfos to gather best connection usage | |
| 2088 // for IPv4 and IPv6. | |
| 2089 void WebRtcSession::ReportBestConnectionState( | |
| 2090 const cricket::TransportStats& stats) { | |
| 2091 RTC_DCHECK(metrics_observer_ != NULL); | |
| 2092 for (cricket::TransportChannelStatsList::const_iterator it = | |
| 2093 stats.channel_stats.begin(); | |
| 2094 it != stats.channel_stats.end(); ++it) { | |
| 2095 for (cricket::ConnectionInfos::const_iterator it_info = | |
| 2096 it->connection_infos.begin(); | |
| 2097 it_info != it->connection_infos.end(); ++it_info) { | |
| 2098 if (!it_info->best_connection) { | |
| 2099 continue; | |
| 2100 } | |
| 2101 | |
| 2102 PeerConnectionEnumCounterType type = kPeerConnectionEnumCounterMax; | |
| 2103 const cricket::Candidate& local = it_info->local_candidate; | |
| 2104 const cricket::Candidate& remote = it_info->remote_candidate; | |
| 2105 | |
| 2106 // Increment the counter for IceCandidatePairType. | |
| 2107 if (local.protocol() == cricket::TCP_PROTOCOL_NAME || | |
| 2108 (local.type() == RELAY_PORT_TYPE && | |
| 2109 local.relay_protocol() == cricket::TCP_PROTOCOL_NAME)) { | |
| 2110 type = kEnumCounterIceCandidatePairTypeTcp; | |
| 2111 } else if (local.protocol() == cricket::UDP_PROTOCOL_NAME) { | |
| 2112 type = kEnumCounterIceCandidatePairTypeUdp; | |
| 2113 } else { | |
| 2114 RTC_CHECK(0); | |
| 2115 } | |
| 2116 metrics_observer_->IncrementEnumCounter( | |
| 2117 type, GetIceCandidatePairCounter(local, remote), | |
| 2118 kIceCandidatePairMax); | |
| 2119 | |
| 2120 // Increment the counter for IP type. | |
| 2121 if (local.address().family() == AF_INET) { | |
| 2122 metrics_observer_->IncrementEnumCounter( | |
| 2123 kEnumCounterAddressFamily, kBestConnections_IPv4, | |
| 2124 kPeerConnectionAddressFamilyCounter_Max); | |
| 2125 | |
| 2126 } else if (local.address().family() == AF_INET6) { | |
| 2127 metrics_observer_->IncrementEnumCounter( | |
| 2128 kEnumCounterAddressFamily, kBestConnections_IPv6, | |
| 2129 kPeerConnectionAddressFamilyCounter_Max); | |
| 2130 } else { | |
| 2131 RTC_CHECK(0); | |
| 2132 } | |
| 2133 | |
| 2134 return; | |
| 2135 } | |
| 2136 } | |
| 2137 } | |
| 2138 | |
| 2139 void WebRtcSession::ReportNegotiatedCiphers( | |
| 2140 const cricket::TransportStats& stats) { | |
| 2141 RTC_DCHECK(metrics_observer_ != NULL); | |
| 2142 if (!dtls_enabled_ || stats.channel_stats.empty()) { | |
| 2143 return; | |
| 2144 } | |
| 2145 | |
| 2146 int srtp_crypto_suite = stats.channel_stats[0].srtp_crypto_suite; | |
| 2147 int ssl_cipher_suite = stats.channel_stats[0].ssl_cipher_suite; | |
| 2148 if (srtp_crypto_suite == rtc::SRTP_INVALID_CRYPTO_SUITE && | |
| 2149 ssl_cipher_suite == rtc::TLS_NULL_WITH_NULL_NULL) { | |
| 2150 return; | |
| 2151 } | |
| 2152 | |
| 2153 PeerConnectionEnumCounterType srtp_counter_type; | |
| 2154 PeerConnectionEnumCounterType ssl_counter_type; | |
| 2155 if (stats.transport_name == cricket::CN_AUDIO) { | |
| 2156 srtp_counter_type = kEnumCounterAudioSrtpCipher; | |
| 2157 ssl_counter_type = kEnumCounterAudioSslCipher; | |
| 2158 } else if (stats.transport_name == cricket::CN_VIDEO) { | |
| 2159 srtp_counter_type = kEnumCounterVideoSrtpCipher; | |
| 2160 ssl_counter_type = kEnumCounterVideoSslCipher; | |
| 2161 } else if (stats.transport_name == cricket::CN_DATA) { | |
| 2162 srtp_counter_type = kEnumCounterDataSrtpCipher; | |
| 2163 ssl_counter_type = kEnumCounterDataSslCipher; | |
| 2164 } else { | |
| 2165 RTC_NOTREACHED(); | |
| 2166 return; | |
| 2167 } | |
| 2168 | |
| 2169 if (srtp_crypto_suite != rtc::SRTP_INVALID_CRYPTO_SUITE) { | |
| 2170 metrics_observer_->IncrementSparseEnumCounter(srtp_counter_type, | |
| 2171 srtp_crypto_suite); | |
| 2172 } | |
| 2173 if (ssl_cipher_suite != rtc::TLS_NULL_WITH_NULL_NULL) { | |
| 2174 metrics_observer_->IncrementSparseEnumCounter(ssl_counter_type, | |
| 2175 ssl_cipher_suite); | |
| 2176 } | |
| 2177 } | |
| 2178 | |
| 2179 void WebRtcSession::OnSentPacket_w(cricket::TransportChannel* channel, | |
| 2180 const rtc::SentPacket& sent_packet) { | |
| 2181 RTC_DCHECK(worker_thread()->IsCurrent()); | |
| 2182 media_controller_->call_w()->OnSentPacket(sent_packet); | |
| 2183 } | |
| 2184 | |
| 2185 } // namespace webrtc | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1610243002:
Move talk/app/webrtc to webrtc/api (Closed)
Base URL: https://chromium.googlesource.com/external/webrtc.git@master