Adding OrtcFactory, and changing UdpTransport to match current plan.

webrtc/p2p/base/udptransport.cc

+/*
+ *  Copyright 2016 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 "webrtc/p2p/base/udptransport.h"
+
+#include <string>
+#include <utility>  // For std::move.
+
+#include "webrtc/base/asyncudpsocket.h"
+#include "webrtc/base/asyncpacketsocket.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/base/socketaddress.h"
+#include "webrtc/base/thread.h"
+#include "webrtc/base/thread_checker.h"
+
+namespace cricket {
+
+UdpTransport::UdpTransport(const std::string& transport_name,
+                           std::unique_ptr<rtc::AsyncPacketSocket> socket)
+    : transport_name_(transport_name), socket_(std::move(socket)) {
+  RTC_DCHECK(socket_);
+  socket_->SignalReadPacket.connect(this, &UdpTransport::OnSocketReadPacket);
+  socket_->SignalSentPacket.connect(this, &UdpTransport::OnSocketSentPacket);
+}
+
+UdpTransport::~UdpTransport() {
+  RTC_DCHECK_RUN_ON(&network_thread_checker_);
+}
+
+rtc::SocketAddress UdpTransport::GetLocalAddress() const {
+  RTC_DCHECK_RUN_ON(&network_thread_checker_);
+  return socket_->GetLocalAddress();
+}
+
+bool UdpTransport::SetRemoteAddress(const rtc::SocketAddress& addr) {
+  RTC_DCHECK_RUN_ON(&network_thread_checker_);
+  if (!addr.IsComplete()) {
+    LOG(LS_WARNING) << "Remote address not complete.";
+    return false;
+  }
+  // TODO(johan): check for ipv4, other settings.
+  bool prev_destination_nil = remote_address_.IsNil();
+  remote_address_ = addr;
+  // Going from "didn't have destination" to "have destination" or vice versa.
+  if (prev_destination_nil != remote_address_.IsNil()) {
+    SignalWritableState(this);
+    if (prev_destination_nil) {
+      SignalReadyToSend(this);
+    }
+  }
+  return true;
+}
+
+rtc::SocketAddress UdpTransport::GetRemoteAddress() const {
+  RTC_DCHECK_RUN_ON(&network_thread_checker_);
+  return remote_address_;
+}
+
+bool UdpTransport::writable() const {
+  RTC_DCHECK_RUN_ON(&network_thread_checker_);
+  return !remote_address_.IsNil();
+}
+
+int UdpTransport::SendPacket(const char* data,
+                             size_t len,
+                             const rtc::PacketOptions& options,
+                             int flags) {
+  // No thread_checker in high frequency network function.
+  if (remote_address_.IsNil()) {
+    LOG(LS_WARNING) << "Remote address not set.";
+    send_error_ = ENOTCONN;
+    return -1;
+  }
+  int result =
+      socket_->SendTo((const void*)data, len, remote_address_, options);
+  if (result <= 0) {
+    LOG(LS_VERBOSE) << "SendPacket() " << result;
+  }
+  return result;
+}
+
+void UdpTransport::OnSocketReadPacket(rtc::AsyncPacketSocket* socket,
+                                      const char* data,
+                                      size_t len,
+                                      const rtc::SocketAddress& remote_addr,
+                                      const rtc::PacketTime& packet_time) {
+  // No thread_checker in high frequency network function.
+  SignalReadPacket(this, data, len, packet_time, 0);
+}
+
+void UdpTransport::OnSocketSentPacket(rtc::AsyncPacketSocket* socket,
+                                      const rtc::SentPacket& packet) {
+  RTC_DCHECK_EQ(socket_.get(), socket);
+  SignalSentPacket(this, packet);
+}
+
+}  // namespace cricket