1 files changed, 147 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/async_udp_socket.cc b/third_party/libwebrtc/rtc_base/async_udp_socket.cc
new file mode 100644
index 0000000000..af7ae56fb6
--- /dev/null
+++ b/third_party/libwebrtc/rtc_base/async_udp_socket.cc
@@ -0,0 +1,147 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "rtc_base/async_udp_socket.h"
+
+
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/network/sent_packet.h"
+#include "rtc_base/time_utils.h"
+#include "system_wrappers/include/field_trial.h"
+
+namespace rtc {
+
+// Returns true if the experiement "WebRTC-SCM-Timestamp" is explicitly
+// disabled.
+static bool IsScmTimeStampExperimentDisabled() {
+  return webrtc::field_trial::IsDisabled("WebRTC-SCM-Timestamp");
+}
+
+AsyncUDPSocket* AsyncUDPSocket::Create(Socket* socket,
+                                       const SocketAddress& bind_address) {
+  std::unique_ptr<Socket> owned_socket(socket);
+  if (socket->Bind(bind_address) < 0) {
+    RTC_LOG(LS_ERROR) << "Bind() failed with error " << socket->GetError();
+    return nullptr;
+  }
+  return new AsyncUDPSocket(owned_socket.release());
+}
+
+AsyncUDPSocket* AsyncUDPSocket::Create(SocketFactory* factory,
+                                       const SocketAddress& bind_address) {
+  Socket* socket = factory->CreateSocket(bind_address.family(), SOCK_DGRAM);
+  if (!socket)
+    return nullptr;
+  return Create(socket, bind_address);
+}
+
+AsyncUDPSocket::AsyncUDPSocket(Socket* socket) : socket_(socket) {
+  sequence_checker_.Detach();
+  // The socket should start out readable but not writable.
+  socket_->SignalReadEvent.connect(this, &AsyncUDPSocket::OnReadEvent);
+  socket_->SignalWriteEvent.connect(this, &AsyncUDPSocket::OnWriteEvent);
+}
+
+SocketAddress AsyncUDPSocket::GetLocalAddress() const {
+  return socket_->GetLocalAddress();
+}
+
+SocketAddress AsyncUDPSocket::GetRemoteAddress() const {
+  return socket_->GetRemoteAddress();
+}
+
+int AsyncUDPSocket::Send(const void* pv,
+                         size_t cb,
+                         const rtc::PacketOptions& options) {
+  rtc::SentPacket sent_packet(options.packet_id, rtc::TimeMillis(),
+                              options.info_signaled_after_sent);
+  CopySocketInformationToPacketInfo(cb, *this, false, &sent_packet.info);
+  int ret = socket_->Send(pv, cb);
+  SignalSentPacket(this, sent_packet);
+  return ret;
+}
+
+int AsyncUDPSocket::SendTo(const void* pv,
+                           size_t cb,
+                           const SocketAddress& addr,
+                           const rtc::PacketOptions& options) {
+  rtc::SentPacket sent_packet(options.packet_id, rtc::TimeMillis(),
+                              options.info_signaled_after_sent);
+  CopySocketInformationToPacketInfo(cb, *this, true, &sent_packet.info);
+  int ret = socket_->SendTo(pv, cb, addr);
+  SignalSentPacket(this, sent_packet);
+  return ret;
+}
+
+int AsyncUDPSocket::Close() {
+  return socket_->Close();
+}
+
+AsyncUDPSocket::State AsyncUDPSocket::GetState() const {
+  return STATE_BOUND;
+}
+
+int AsyncUDPSocket::GetOption(Socket::Option opt, int* value) {
+  return socket_->GetOption(opt, value);
+}
+
+int AsyncUDPSocket::SetOption(Socket::Option opt, int value) {
+  return socket_->SetOption(opt, value);
+}
+
+int AsyncUDPSocket::GetError() const {
+  return socket_->GetError();
+}
+
+void AsyncUDPSocket::SetError(int error) {
+  return socket_->SetError(error);
+}
+
+void AsyncUDPSocket::OnReadEvent(Socket* socket) {
+  RTC_DCHECK(socket_.get() == socket);
+  RTC_DCHECK_RUN_ON(&sequence_checker_);
+
+  SocketAddress remote_addr;
+  int64_t timestamp = -1;
+  int len = socket_->RecvFrom(buf_, BUF_SIZE, &remote_addr, &timestamp);
+
+  if (len < 0) {
+    // An error here typically means we got an ICMP error in response to our
+    // send datagram, indicating the remote address was unreachable.
+    // When doing ICE, this kind of thing will often happen.
+    // TODO: Do something better like forwarding the error to the user.
+    SocketAddress local_addr = socket_->GetLocalAddress();
+    RTC_LOG(LS_INFO) << "AsyncUDPSocket[" << local_addr.ToSensitiveString()
+                     << "] receive failed with error " << socket_->GetError();
+    return;
+  }
+  if (timestamp == -1) {
+    // Timestamp from socket is not available.
+    timestamp = TimeMicros();
+  } else {
+    if (!socket_time_offset_) {
+      socket_time_offset_ =
+          !IsScmTimeStampExperimentDisabled() ? TimeMicros() - timestamp : 0;
+    }
+    timestamp += *socket_time_offset_;
+  }
+
+  // TODO: Make sure that we got all of the packet.
+  // If we did not, then we should resize our buffer to be large enough.
+  SignalReadPacket(this, buf_, static_cast<size_t>(len), remote_addr,
+                   timestamp);
+}
+
+void AsyncUDPSocket::OnWriteEvent(Socket* socket) {
+  SignalReadyToSend(this);
+}
+
+}  // namespace rtc