OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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23 namespace { | 23 namespace { |
24 | 24 |
25 // messages for queuing up work for ourselves | 25 // messages for queuing up work for ourselves |
26 enum { MSG_SORT = 1, MSG_CHECK_AND_PING }; | 26 enum { MSG_SORT = 1, MSG_CHECK_AND_PING }; |
27 | 27 |
28 // When the socket is unwritable, we will use 10 Kbps (ignoring IP+UDP headers) | 28 // When the socket is unwritable, we will use 10 Kbps (ignoring IP+UDP headers) |
29 // for pinging. When the socket is writable, we will use only 1 Kbps because | 29 // for pinging. When the socket is writable, we will use only 1 Kbps because |
30 // we don't want to degrade the quality on a modem. These numbers should work | 30 // we don't want to degrade the quality on a modem. These numbers should work |
31 // well on a 28.8K modem, which is the slowest connection on which the voice | 31 // well on a 28.8K modem, which is the slowest connection on which the voice |
32 // quality is reasonable at all. | 32 // quality is reasonable at all. |
33 static const uint32 PING_PACKET_SIZE = 60 * 8; | 33 static const uint32_t PING_PACKET_SIZE = 60 * 8; |
34 // STRONG_PING_DELAY (480ms) is applied when the best connection is both | 34 // STRONG_PING_DELAY (480ms) is applied when the best connection is both |
35 // writable and receiving. | 35 // writable and receiving. |
36 static const uint32 STRONG_PING_DELAY = 1000 * PING_PACKET_SIZE / 1000; | 36 static const uint32_t STRONG_PING_DELAY = 1000 * PING_PACKET_SIZE / 1000; |
37 // WEAK_PING_DELAY (48ms) is applied when the best connection is either not | 37 // WEAK_PING_DELAY (48ms) is applied when the best connection is either not |
38 // writable or not receiving. | 38 // writable or not receiving. |
39 static const uint32 WEAK_PING_DELAY = 1000 * PING_PACKET_SIZE / 10000; | 39 static const uint32_t WEAK_PING_DELAY = 1000 * PING_PACKET_SIZE / 10000; |
40 | 40 |
41 // If the current best connection is both writable and receiving, then we will | 41 // If the current best connection is both writable and receiving, then we will |
42 // also try hard to make sure it is pinged at this rate (a little less than | 42 // also try hard to make sure it is pinged at this rate (a little less than |
43 // 2 * STRONG_PING_DELAY). | 43 // 2 * STRONG_PING_DELAY). |
44 static const uint32 MAX_CURRENT_STRONG_DELAY = 900; | 44 static const uint32_t MAX_CURRENT_STRONG_DELAY = 900; |
45 | 45 |
46 static const int MIN_CHECK_RECEIVING_DELAY = 50; // ms | 46 static const int MIN_CHECK_RECEIVING_DELAY = 50; // ms |
47 | 47 |
48 // The minimum improvement in RTT that justifies a switch. | 48 // The minimum improvement in RTT that justifies a switch. |
49 static const double kMinImprovement = 10; | 49 static const double kMinImprovement = 10; |
50 | 50 |
51 cricket::PortInterface::CandidateOrigin GetOrigin(cricket::PortInterface* port, | 51 cricket::PortInterface::CandidateOrigin GetOrigin(cricket::PortInterface* port, |
52 cricket::PortInterface* origin_port) { | 52 cricket::PortInterface* origin_port) { |
53 if (!origin_port) | 53 if (!origin_port) |
54 return cricket::PortInterface::ORIGIN_MESSAGE; | 54 return cricket::PortInterface::ORIGIN_MESSAGE; |
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218 ice_role_(ICEROLE_UNKNOWN), | 218 ice_role_(ICEROLE_UNKNOWN), |
219 tiebreaker_(0), | 219 tiebreaker_(0), |
220 remote_candidate_generation_(0), | 220 remote_candidate_generation_(0), |
221 gathering_state_(kIceGatheringNew), | 221 gathering_state_(kIceGatheringNew), |
222 check_receiving_delay_(MIN_CHECK_RECEIVING_DELAY * 5), | 222 check_receiving_delay_(MIN_CHECK_RECEIVING_DELAY * 5), |
223 receiving_timeout_(MIN_CHECK_RECEIVING_DELAY * 50) {} | 223 receiving_timeout_(MIN_CHECK_RECEIVING_DELAY * 50) {} |
224 | 224 |
225 P2PTransportChannel::~P2PTransportChannel() { | 225 P2PTransportChannel::~P2PTransportChannel() { |
226 ASSERT(worker_thread_ == rtc::Thread::Current()); | 226 ASSERT(worker_thread_ == rtc::Thread::Current()); |
227 | 227 |
228 for (uint32 i = 0; i < allocator_sessions_.size(); ++i) | 228 for (size_t i = 0; i < allocator_sessions_.size(); ++i) |
229 delete allocator_sessions_[i]; | 229 delete allocator_sessions_[i]; |
230 } | 230 } |
231 | 231 |
232 // Add the allocator session to our list so that we know which sessions | 232 // Add the allocator session to our list so that we know which sessions |
233 // are still active. | 233 // are still active. |
234 void P2PTransportChannel::AddAllocatorSession(PortAllocatorSession* session) { | 234 void P2PTransportChannel::AddAllocatorSession(PortAllocatorSession* session) { |
235 session->set_generation(static_cast<uint32>(allocator_sessions_.size())); | 235 session->set_generation(static_cast<uint32_t>(allocator_sessions_.size())); |
236 allocator_sessions_.push_back(session); | 236 allocator_sessions_.push_back(session); |
237 | 237 |
238 // We now only want to apply new candidates that we receive to the ports | 238 // We now only want to apply new candidates that we receive to the ports |
239 // created by this new session because these are replacing those of the | 239 // created by this new session because these are replacing those of the |
240 // previous sessions. | 240 // previous sessions. |
241 ports_.clear(); | 241 ports_.clear(); |
242 | 242 |
243 session->SignalPortReady.connect(this, &P2PTransportChannel::OnPortReady); | 243 session->SignalPortReady.connect(this, &P2PTransportChannel::OnPortReady); |
244 session->SignalCandidatesReady.connect( | 244 session->SignalCandidatesReady.connect( |
245 this, &P2PTransportChannel::OnCandidatesReady); | 245 this, &P2PTransportChannel::OnCandidatesReady); |
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268 ASSERT(worker_thread_ == rtc::Thread::Current()); | 268 ASSERT(worker_thread_ == rtc::Thread::Current()); |
269 if (ice_role_ != ice_role) { | 269 if (ice_role_ != ice_role) { |
270 ice_role_ = ice_role; | 270 ice_role_ = ice_role; |
271 for (std::vector<PortInterface *>::iterator it = ports_.begin(); | 271 for (std::vector<PortInterface *>::iterator it = ports_.begin(); |
272 it != ports_.end(); ++it) { | 272 it != ports_.end(); ++it) { |
273 (*it)->SetIceRole(ice_role); | 273 (*it)->SetIceRole(ice_role); |
274 } | 274 } |
275 } | 275 } |
276 } | 276 } |
277 | 277 |
278 void P2PTransportChannel::SetIceTiebreaker(uint64 tiebreaker) { | 278 void P2PTransportChannel::SetIceTiebreaker(uint64_t tiebreaker) { |
279 ASSERT(worker_thread_ == rtc::Thread::Current()); | 279 ASSERT(worker_thread_ == rtc::Thread::Current()); |
280 if (!ports_.empty()) { | 280 if (!ports_.empty()) { |
281 LOG(LS_ERROR) | 281 LOG(LS_ERROR) |
282 << "Attempt to change tiebreaker after Port has been allocated."; | 282 << "Attempt to change tiebreaker after Port has been allocated."; |
283 return; | 283 return; |
284 } | 284 } |
285 | 285 |
286 tiebreaker_ = tiebreaker; | 286 tiebreaker_ = tiebreaker; |
287 } | 287 } |
288 | 288 |
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546 // existing remote candidates, it represents a new peer reflexive remote | 546 // existing remote candidates, it represents a new peer reflexive remote |
547 // candidate. | 547 // candidate. |
548 remote_candidate = | 548 remote_candidate = |
549 Candidate(component(), ProtoToString(proto), address, 0, | 549 Candidate(component(), ProtoToString(proto), address, 0, |
550 remote_username, remote_password, PRFLX_PORT_TYPE, 0U, ""); | 550 remote_username, remote_password, PRFLX_PORT_TYPE, 0U, ""); |
551 | 551 |
552 // From RFC 5245, section-7.2.1.3: | 552 // From RFC 5245, section-7.2.1.3: |
553 // The foundation of the candidate is set to an arbitrary value, different | 553 // The foundation of the candidate is set to an arbitrary value, different |
554 // from the foundation for all other remote candidates. | 554 // from the foundation for all other remote candidates. |
555 remote_candidate.set_foundation( | 555 remote_candidate.set_foundation( |
556 rtc::ToString<uint32>(rtc::ComputeCrc32(remote_candidate.id()))); | 556 rtc::ToString<uint32_t>(rtc::ComputeCrc32(remote_candidate.id()))); |
557 | 557 |
558 remote_candidate.set_priority(remote_candidate_priority); | 558 remote_candidate.set_priority(remote_candidate_priority); |
559 } | 559 } |
560 | 560 |
561 // RFC5245, the agent constructs a pair whose local candidate is equal to | 561 // RFC5245, the agent constructs a pair whose local candidate is equal to |
562 // the transport address on which the STUN request was received, and a | 562 // the transport address on which the STUN request was received, and a |
563 // remote candidate equal to the source transport address where the | 563 // remote candidate equal to the source transport address where the |
564 // request came from. | 564 // request came from. |
565 | 565 |
566 // There shouldn't be an existing connection with this remote address. | 566 // There shouldn't be an existing connection with this remote address. |
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631 } else { | 631 } else { |
632 LOG(LS_INFO) << "Not switching the best connection on controlled side yet," | 632 LOG(LS_INFO) << "Not switching the best connection on controlled side yet," |
633 << " because it's not writable: " << conn->ToString(); | 633 << " because it's not writable: " << conn->ToString(); |
634 pending_best_connection_ = conn; | 634 pending_best_connection_ = conn; |
635 } | 635 } |
636 } | 636 } |
637 | 637 |
638 void P2PTransportChannel::AddRemoteCandidate(const Candidate& candidate) { | 638 void P2PTransportChannel::AddRemoteCandidate(const Candidate& candidate) { |
639 ASSERT(worker_thread_ == rtc::Thread::Current()); | 639 ASSERT(worker_thread_ == rtc::Thread::Current()); |
640 | 640 |
641 uint32 generation = candidate.generation(); | 641 uint32_t generation = candidate.generation(); |
642 // Network may not guarantee the order of the candidate delivery. If a | 642 // Network may not guarantee the order of the candidate delivery. If a |
643 // remote candidate with an older generation arrives, drop it. | 643 // remote candidate with an older generation arrives, drop it. |
644 if (generation != 0 && generation < remote_candidate_generation_) { | 644 if (generation != 0 && generation < remote_candidate_generation_) { |
645 LOG(LS_WARNING) << "Dropping a remote candidate because its generation " | 645 LOG(LS_WARNING) << "Dropping a remote candidate because its generation " |
646 << generation | 646 << generation |
647 << " is lower than the current remote generation " | 647 << " is lower than the current remote generation " |
648 << remote_candidate_generation_; | 648 << remote_candidate_generation_; |
649 return; | 649 return; |
650 } | 650 } |
651 | 651 |
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758 return true; | 758 return true; |
759 } | 759 } |
760 | 760 |
761 bool P2PTransportChannel::FindConnection( | 761 bool P2PTransportChannel::FindConnection( |
762 cricket::Connection* connection) const { | 762 cricket::Connection* connection) const { |
763 std::vector<Connection*>::const_iterator citer = | 763 std::vector<Connection*>::const_iterator citer = |
764 std::find(connections_.begin(), connections_.end(), connection); | 764 std::find(connections_.begin(), connections_.end(), connection); |
765 return citer != connections_.end(); | 765 return citer != connections_.end(); |
766 } | 766 } |
767 | 767 |
768 uint32 P2PTransportChannel::GetRemoteCandidateGeneration( | 768 uint32_t P2PTransportChannel::GetRemoteCandidateGeneration( |
769 const Candidate& candidate) { | 769 const Candidate& candidate) { |
770 // We need to keep track of the remote ice restart so newer | 770 // We need to keep track of the remote ice restart so newer |
771 // connections are prioritized over the older. | 771 // connections are prioritized over the older. |
772 ASSERT(candidate.generation() == 0 || | 772 ASSERT(candidate.generation() == 0 || |
773 candidate.generation() == remote_candidate_generation_); | 773 candidate.generation() == remote_candidate_generation_); |
774 return remote_candidate_generation_; | 774 return remote_candidate_generation_; |
775 } | 775 } |
776 | 776 |
777 // Check if remote candidate is already cached. | 777 // Check if remote candidate is already cached. |
778 bool P2PTransportChannel::IsDuplicateRemoteCandidate( | 778 bool P2PTransportChannel::IsDuplicateRemoteCandidate( |
779 const Candidate& candidate) { | 779 const Candidate& candidate) { |
780 for (uint32 i = 0; i < remote_candidates_.size(); ++i) { | 780 for (size_t i = 0; i < remote_candidates_.size(); ++i) { |
781 if (remote_candidates_[i].IsEquivalent(candidate)) { | 781 if (remote_candidates_[i].IsEquivalent(candidate)) { |
782 return true; | 782 return true; |
783 } | 783 } |
784 } | 784 } |
785 return false; | 785 return false; |
786 } | 786 } |
787 | 787 |
788 // Maintain our remote candidate list, adding this new remote one. | 788 // Maintain our remote candidate list, adding this new remote one. |
789 void P2PTransportChannel::RememberRemoteCandidate( | 789 void P2PTransportChannel::RememberRemoteCandidate( |
790 const Candidate& remote_candidate, PortInterface* origin_port) { | 790 const Candidate& remote_candidate, PortInterface* origin_port) { |
791 // Remove any candidates whose generation is older than this one. The | 791 // Remove any candidates whose generation is older than this one. The |
792 // presence of a new generation indicates that the old ones are not useful. | 792 // presence of a new generation indicates that the old ones are not useful. |
793 uint32 i = 0; | 793 size_t i = 0; |
794 while (i < remote_candidates_.size()) { | 794 while (i < remote_candidates_.size()) { |
795 if (remote_candidates_[i].generation() < remote_candidate.generation()) { | 795 if (remote_candidates_[i].generation() < remote_candidate.generation()) { |
796 LOG(INFO) << "Pruning candidate from old generation: " | 796 LOG(INFO) << "Pruning candidate from old generation: " |
797 << remote_candidates_[i].address().ToSensitiveString(); | 797 << remote_candidates_[i].address().ToSensitiveString(); |
798 remote_candidates_.erase(remote_candidates_.begin() + i); | 798 remote_candidates_.erase(remote_candidates_.begin() + i); |
799 } else { | 799 } else { |
800 i += 1; | 800 i += 1; |
801 } | 801 } |
802 } | 802 } |
803 | 803 |
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817 ASSERT(worker_thread_ == rtc::Thread::Current()); | 817 ASSERT(worker_thread_ == rtc::Thread::Current()); |
818 OptionMap::iterator it = options_.find(opt); | 818 OptionMap::iterator it = options_.find(opt); |
819 if (it == options_.end()) { | 819 if (it == options_.end()) { |
820 options_.insert(std::make_pair(opt, value)); | 820 options_.insert(std::make_pair(opt, value)); |
821 } else if (it->second == value) { | 821 } else if (it->second == value) { |
822 return 0; | 822 return 0; |
823 } else { | 823 } else { |
824 it->second = value; | 824 it->second = value; |
825 } | 825 } |
826 | 826 |
827 for (uint32 i = 0; i < ports_.size(); ++i) { | 827 for (size_t i = 0; i < ports_.size(); ++i) { |
828 int val = ports_[i]->SetOption(opt, value); | 828 int val = ports_[i]->SetOption(opt, value); |
829 if (val < 0) { | 829 if (val < 0) { |
830 // Because this also occurs deferred, probably no point in reporting an | 830 // Because this also occurs deferred, probably no point in reporting an |
831 // error | 831 // error |
832 LOG(WARNING) << "SetOption(" << opt << ", " << value << ") failed: " | 832 LOG(WARNING) << "SetOption(" << opt << ", " << value << ") failed: " |
833 << ports_[i]->GetError(); | 833 << ports_[i]->GetError(); |
834 } | 834 } |
835 } | 835 } |
836 return 0; | 836 return 0; |
837 } | 837 } |
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904 rtc::DiffServCodePoint P2PTransportChannel::DefaultDscpValue() const { | 904 rtc::DiffServCodePoint P2PTransportChannel::DefaultDscpValue() const { |
905 OptionMap::const_iterator it = options_.find(rtc::Socket::OPT_DSCP); | 905 OptionMap::const_iterator it = options_.find(rtc::Socket::OPT_DSCP); |
906 if (it == options_.end()) { | 906 if (it == options_.end()) { |
907 return rtc::DSCP_NO_CHANGE; | 907 return rtc::DSCP_NO_CHANGE; |
908 } | 908 } |
909 return static_cast<rtc::DiffServCodePoint> (it->second); | 909 return static_cast<rtc::DiffServCodePoint> (it->second); |
910 } | 910 } |
911 | 911 |
912 // Monitor connection states. | 912 // Monitor connection states. |
913 void P2PTransportChannel::UpdateConnectionStates() { | 913 void P2PTransportChannel::UpdateConnectionStates() { |
914 uint32 now = rtc::Time(); | 914 uint32_t now = rtc::Time(); |
915 | 915 |
916 // We need to copy the list of connections since some may delete themselves | 916 // We need to copy the list of connections since some may delete themselves |
917 // when we call UpdateState. | 917 // when we call UpdateState. |
918 for (uint32 i = 0; i < connections_.size(); ++i) | 918 for (size_t i = 0; i < connections_.size(); ++i) |
919 connections_[i]->UpdateState(now); | 919 connections_[i]->UpdateState(now); |
920 } | 920 } |
921 | 921 |
922 // Prepare for best candidate sorting. | 922 // Prepare for best candidate sorting. |
923 void P2PTransportChannel::RequestSort() { | 923 void P2PTransportChannel::RequestSort() { |
924 if (!sort_dirty_) { | 924 if (!sort_dirty_) { |
925 worker_thread_->Post(this, MSG_SORT); | 925 worker_thread_->Post(this, MSG_SORT); |
926 sort_dirty_ = true; | 926 sort_dirty_ = true; |
927 } | 927 } |
928 } | 928 } |
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940 sort_dirty_ = false; | 940 sort_dirty_ = false; |
941 | 941 |
942 // Find the best alternative connection by sorting. It is important to note | 942 // Find the best alternative connection by sorting. It is important to note |
943 // that amongst equal preference, writable connections, this will choose the | 943 // that amongst equal preference, writable connections, this will choose the |
944 // one whose estimated latency is lowest. So it is the only one that we | 944 // one whose estimated latency is lowest. So it is the only one that we |
945 // need to consider switching to. | 945 // need to consider switching to. |
946 ConnectionCompare cmp; | 946 ConnectionCompare cmp; |
947 std::stable_sort(connections_.begin(), connections_.end(), cmp); | 947 std::stable_sort(connections_.begin(), connections_.end(), cmp); |
948 LOG(LS_VERBOSE) << "Sorting " << connections_.size() | 948 LOG(LS_VERBOSE) << "Sorting " << connections_.size() |
949 << " available connections:"; | 949 << " available connections:"; |
950 for (uint32 i = 0; i < connections_.size(); ++i) { | 950 for (size_t i = 0; i < connections_.size(); ++i) { |
951 LOG(LS_VERBOSE) << connections_[i]->ToString(); | 951 LOG(LS_VERBOSE) << connections_[i]->ToString(); |
952 } | 952 } |
953 | 953 |
954 Connection* top_connection = | 954 Connection* top_connection = |
955 (connections_.size() > 0) ? connections_[0] : nullptr; | 955 (connections_.size() > 0) ? connections_[0] : nullptr; |
956 | 956 |
957 // If necessary, switch to the new choice. | 957 // If necessary, switch to the new choice. |
958 // Note that |top_connection| doesn't have to be writable to become the best | 958 // Note that |top_connection| doesn't have to be writable to become the best |
959 // connection although it will have higher priority if it is writable. | 959 // connection although it will have higher priority if it is writable. |
960 if (ShouldSwitch(best_connection_, top_connection, ice_role_)) { | 960 if (ShouldSwitch(best_connection_, top_connection, ice_role_)) { |
961 LOG(LS_INFO) << "Switching best connection: " << top_connection->ToString(); | 961 LOG(LS_INFO) << "Switching best connection: " << top_connection->ToString(); |
962 SwitchBestConnectionTo(top_connection); | 962 SwitchBestConnectionTo(top_connection); |
963 } | 963 } |
964 | 964 |
965 // Controlled side can prune only if the best connection has been nominated. | 965 // Controlled side can prune only if the best connection has been nominated. |
966 // because otherwise it may delete the connection that will be selected by | 966 // because otherwise it may delete the connection that will be selected by |
967 // the controlling side. | 967 // the controlling side. |
968 if (ice_role_ == ICEROLE_CONTROLLING || best_nominated_connection()) { | 968 if (ice_role_ == ICEROLE_CONTROLLING || best_nominated_connection()) { |
969 PruneConnections(); | 969 PruneConnections(); |
970 } | 970 } |
971 | 971 |
972 // Check if all connections are timedout. | 972 // Check if all connections are timedout. |
973 bool all_connections_timedout = true; | 973 bool all_connections_timedout = true; |
974 for (uint32 i = 0; i < connections_.size(); ++i) { | 974 for (size_t i = 0; i < connections_.size(); ++i) { |
975 if (connections_[i]->write_state() != Connection::STATE_WRITE_TIMEOUT) { | 975 if (connections_[i]->write_state() != Connection::STATE_WRITE_TIMEOUT) { |
976 all_connections_timedout = false; | 976 all_connections_timedout = false; |
977 break; | 977 break; |
978 } | 978 } |
979 } | 979 } |
980 | 980 |
981 // Now update the writable state of the channel with the information we have | 981 // Now update the writable state of the channel with the information we have |
982 // so far. | 982 // so far. |
983 if (best_connection_ && best_connection_->writable()) { | 983 if (best_connection_ && best_connection_->writable()) { |
984 HandleWritable(); | 984 HandleWritable(); |
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1113 | 1113 |
1114 // If we have a best connection, return it, otherwise return top one in the | 1114 // If we have a best connection, return it, otherwise return top one in the |
1115 // list (later we will mark it best). | 1115 // list (later we will mark it best). |
1116 Connection* P2PTransportChannel::GetBestConnectionOnNetwork( | 1116 Connection* P2PTransportChannel::GetBestConnectionOnNetwork( |
1117 rtc::Network* network) const { | 1117 rtc::Network* network) const { |
1118 // If the best connection is on this network, then it wins. | 1118 // If the best connection is on this network, then it wins. |
1119 if (best_connection_ && (best_connection_->port()->Network() == network)) | 1119 if (best_connection_ && (best_connection_->port()->Network() == network)) |
1120 return best_connection_; | 1120 return best_connection_; |
1121 | 1121 |
1122 // Otherwise, we return the top-most in sorted order. | 1122 // Otherwise, we return the top-most in sorted order. |
1123 for (uint32 i = 0; i < connections_.size(); ++i) { | 1123 for (size_t i = 0; i < connections_.size(); ++i) { |
1124 if (connections_[i]->port()->Network() == network) | 1124 if (connections_[i]->port()->Network() == network) |
1125 return connections_[i]; | 1125 return connections_[i]; |
1126 } | 1126 } |
1127 | 1127 |
1128 return NULL; | 1128 return NULL; |
1129 } | 1129 } |
1130 | 1130 |
1131 // Handle any queued up requests | 1131 // Handle any queued up requests |
1132 void P2PTransportChannel::OnMessage(rtc::Message *pmsg) { | 1132 void P2PTransportChannel::OnMessage(rtc::Message *pmsg) { |
1133 switch (pmsg->message_id) { | 1133 switch (pmsg->message_id) { |
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1191 return weak() || conn->write_state() != Connection::STATE_WRITE_TIMEOUT; | 1191 return weak() || conn->write_state() != Connection::STATE_WRITE_TIMEOUT; |
1192 } | 1192 } |
1193 | 1193 |
1194 // Returns the next pingable connection to ping. This will be the oldest | 1194 // Returns the next pingable connection to ping. This will be the oldest |
1195 // pingable connection unless we have a connected, writable connection that is | 1195 // pingable connection unless we have a connected, writable connection that is |
1196 // past the maximum acceptable ping delay. When reconnecting a TCP connection, | 1196 // past the maximum acceptable ping delay. When reconnecting a TCP connection, |
1197 // the best connection is disconnected, although still WRITABLE while | 1197 // the best connection is disconnected, although still WRITABLE while |
1198 // reconnecting. The newly created connection should be selected as the ping | 1198 // reconnecting. The newly created connection should be selected as the ping |
1199 // target to become writable instead. See the big comment in CompareConnections. | 1199 // target to become writable instead. See the big comment in CompareConnections. |
1200 Connection* P2PTransportChannel::FindNextPingableConnection() { | 1200 Connection* P2PTransportChannel::FindNextPingableConnection() { |
1201 uint32 now = rtc::Time(); | 1201 uint32_t now = rtc::Time(); |
1202 if (best_connection_ && best_connection_->connected() && | 1202 if (best_connection_ && best_connection_->connected() && |
1203 best_connection_->writable() && | 1203 best_connection_->writable() && |
1204 (best_connection_->last_ping_sent() + MAX_CURRENT_STRONG_DELAY <= now)) { | 1204 (best_connection_->last_ping_sent() + MAX_CURRENT_STRONG_DELAY <= now)) { |
1205 return best_connection_; | 1205 return best_connection_; |
1206 } | 1206 } |
1207 | 1207 |
1208 // First, find "triggered checks". We ping first those connections | 1208 // First, find "triggered checks". We ping first those connections |
1209 // that have received a ping but have not sent a ping since receiving | 1209 // that have received a ping but have not sent a ping since receiving |
1210 // it (last_received_ping > last_sent_ping). But we shouldn't do | 1210 // it (last_received_ping > last_sent_ping). But we shouldn't do |
1211 // triggered checks if the connection is already writable. | 1211 // triggered checks if the connection is already writable. |
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1356 } | 1356 } |
1357 } | 1357 } |
1358 | 1358 |
1359 void P2PTransportChannel::OnReadyToSend(Connection* connection) { | 1359 void P2PTransportChannel::OnReadyToSend(Connection* connection) { |
1360 if (connection == best_connection_ && writable()) { | 1360 if (connection == best_connection_ && writable()) { |
1361 SignalReadyToSend(this); | 1361 SignalReadyToSend(this); |
1362 } | 1362 } |
1363 } | 1363 } |
1364 | 1364 |
1365 } // namespace cricket | 1365 } // namespace cricket |
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