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| 1 /* | |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/asyncudpsocket.h" | |
| 12 #include "webrtc/base/checks.h" | |
| 13 #include "webrtc/base/logging.h" | |
| 14 | |
| 15 namespace rtc { | |
| 16 | |
| 17 static const int BUF_SIZE = 64 * 1024; | |
| 18 | |
| 19 AsyncUDPSocket* AsyncUDPSocket::Create( | |
| 20 AsyncSocket* socket, | |
| 21 const SocketAddress& bind_address) { | |
| 22 std::unique_ptr<AsyncSocket> owned_socket(socket); | |
| 23 if (socket->Bind(bind_address) < 0) { | |
| 24 LOG(LS_ERROR) << "Bind() failed with error " << socket->GetError(); | |
| 25 return nullptr; | |
| 26 } | |
| 27 return new AsyncUDPSocket(owned_socket.release()); | |
| 28 } | |
| 29 | |
| 30 AsyncUDPSocket* AsyncUDPSocket::Create(SocketFactory* factory, | |
| 31 const SocketAddress& bind_address) { | |
| 32 AsyncSocket* socket = | |
| 33 factory->CreateAsyncSocket(bind_address.family(), SOCK_DGRAM); | |
| 34 if (!socket) | |
| 35 return nullptr; | |
| 36 return Create(socket, bind_address); | |
| 37 } | |
| 38 | |
| 39 AsyncUDPSocket::AsyncUDPSocket(AsyncSocket* socket) | |
| 40 : socket_(socket) { | |
| 41 size_ = BUF_SIZE; | |
| 42 buf_ = new char[size_]; | |
| 43 | |
| 44 // The socket should start out readable but not writable. | |
| 45 socket_->SignalReadEvent.connect(this, &AsyncUDPSocket::OnReadEvent); | |
| 46 socket_->SignalWriteEvent.connect(this, &AsyncUDPSocket::OnWriteEvent); | |
| 47 } | |
| 48 | |
| 49 AsyncUDPSocket::~AsyncUDPSocket() { | |
| 50 delete [] buf_; | |
| 51 } | |
| 52 | |
| 53 SocketAddress AsyncUDPSocket::GetLocalAddress() const { | |
| 54 return socket_->GetLocalAddress(); | |
| 55 } | |
| 56 | |
| 57 SocketAddress AsyncUDPSocket::GetRemoteAddress() const { | |
| 58 return socket_->GetRemoteAddress(); | |
| 59 } | |
| 60 | |
| 61 int AsyncUDPSocket::Send(const void *pv, size_t cb, | |
| 62 const rtc::PacketOptions& options) { | |
| 63 rtc::SentPacket sent_packet(options.packet_id, rtc::TimeMillis()); | |
| 64 int ret = socket_->Send(pv, cb); | |
| 65 SignalSentPacket(this, sent_packet); | |
| 66 return ret; | |
| 67 } | |
| 68 | |
| 69 int AsyncUDPSocket::SendTo(const void *pv, size_t cb, | |
| 70 const SocketAddress& addr, | |
| 71 const rtc::PacketOptions& options) { | |
| 72 rtc::SentPacket sent_packet(options.packet_id, rtc::TimeMillis()); | |
| 73 int ret = socket_->SendTo(pv, cb, addr); | |
| 74 SignalSentPacket(this, sent_packet); | |
| 75 return ret; | |
| 76 } | |
| 77 | |
| 78 int AsyncUDPSocket::Close() { | |
| 79 return socket_->Close(); | |
| 80 } | |
| 81 | |
| 82 AsyncUDPSocket::State AsyncUDPSocket::GetState() const { | |
| 83 return STATE_BOUND; | |
| 84 } | |
| 85 | |
| 86 int AsyncUDPSocket::GetOption(Socket::Option opt, int* value) { | |
| 87 return socket_->GetOption(opt, value); | |
| 88 } | |
| 89 | |
| 90 int AsyncUDPSocket::SetOption(Socket::Option opt, int value) { | |
| 91 return socket_->SetOption(opt, value); | |
| 92 } | |
| 93 | |
| 94 int AsyncUDPSocket::GetError() const { | |
| 95 return socket_->GetError(); | |
| 96 } | |
| 97 | |
| 98 void AsyncUDPSocket::SetError(int error) { | |
| 99 return socket_->SetError(error); | |
| 100 } | |
| 101 | |
| 102 void AsyncUDPSocket::OnReadEvent(AsyncSocket* socket) { | |
| 103 RTC_DCHECK(socket_.get() == socket); | |
| 104 | |
| 105 SocketAddress remote_addr; | |
| 106 int64_t timestamp; | |
| 107 int len = socket_->RecvFrom(buf_, size_, &remote_addr, ×tamp); | |
| 108 if (len < 0) { | |
| 109 // An error here typically means we got an ICMP error in response to our | |
| 110 // send datagram, indicating the remote address was unreachable. | |
| 111 // When doing ICE, this kind of thing will often happen. | |
| 112 // TODO: Do something better like forwarding the error to the user. | |
| 113 SocketAddress local_addr = socket_->GetLocalAddress(); | |
| 114 LOG(LS_INFO) << "AsyncUDPSocket[" << local_addr.ToSensitiveString() << "] " | |
| 115 << "receive failed with error " << socket_->GetError(); | |
| 116 return; | |
| 117 } | |
| 118 | |
| 119 // TODO: Make sure that we got all of the packet. | |
| 120 // If we did not, then we should resize our buffer to be large enough. | |
| 121 SignalReadPacket( | |
| 122 this, buf_, static_cast<size_t>(len), remote_addr, | |
| 123 (timestamp > -1 ? PacketTime(timestamp, 0) : CreatePacketTime(0))); | |
| 124 } | |
| 125 | |
| 126 void AsyncUDPSocket::OnWriteEvent(AsyncSocket* socket) { | |
| 127 SignalReadyToSend(this); | |
| 128 } | |
| 129 | |
| 130 } // namespace rtc | |
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