Adding OrtcFactory, and changing UdpTransport to match current plan.

webrtc/api/ortcfactory.cc

+/*
+ *  Copyright 2017 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/api/ortcfactory.h"
+
+#include <string>
+#include <utility>  // For std::move.
+
+#include "webrtc/base/bind.h"
+#include "webrtc/base/asyncpacketsocket.h"
+#include "webrtc/p2p/base/basicpacketsocketfactory.h"
+#include "webrtc/p2p/base/udptransport.h"
+
+namespace webrtc {
+
+// static
+std::unique_ptr<OrtcFactoryInterface> OrtcFactoryInterface::Create(
+    rtc::Thread* network_thread,
+    rtc::Thread* signaling_thread,
+    rtc::NetworkManager* network_manager,
+    rtc::PacketSocketFactory* socket_factory) {
+  // Hop to signaling thread if needed.
+  if (signaling_thread && !signaling_thread->IsCurrent()) {
+    return signaling_thread->Invoke<std::unique_ptr<OrtcFactoryInterface>>(
+        RTC_FROM_HERE,
+        rtc::Bind(&OrtcFactoryInterface::Create, network_thread,
+                  signaling_thread, network_manager, socket_factory));
+  }
+  OrtcFactory* new_factory =
+      new OrtcFactory(network_thread, signaling_thread,
+                      network_manager, socket_factory);
+  // Return a proxy so that any calls on the returned object (including
+  // destructor) happen on the signaling thread.
+  return OrtcFactoryProxy::Create(new_factory->signaling_thread(),
+                                  new_factory->network_thread(), new_factory);
+}
+
+OrtcFactory::OrtcFactory(rtc::Thread* network_thread,
+                         rtc::Thread* signaling_thread,
+                         rtc::NetworkManager* network_manager,
+                         rtc::PacketSocketFactory* socket_factory)
+    : network_thread_(network_thread),
+      signaling_thread_(signaling_thread),
+      network_manager_(network_manager),
+      socket_factory_(socket_factory) {
+  if (!network_thread_) {
+    owned_network_thread_ = rtc::Thread::CreateWithSocketServer();
+    owned_network_thread_->Start();
+    network_thread_ = owned_network_thread_.get();
+  }
+
+  // The worker thread is created internally because it's an implementation
+  // detail, and consumers of the API don't need to really know about it.
+  owned_worker_thread_ = rtc::Thread::Create();
+  owned_worker_thread_->Start();
+
+  if (signaling_thread_) {
+    RTC_DCHECK_RUN_ON(signaling_thread_);
+  } else {
+    signaling_thread_ = rtc::Thread::Current();
+    if (!signaling_thread_) {
+      // If this thread isn't already wrapped by an rtc::Thread, create a
+      // wrapper and own it in this class.
+      signaling_thread_ = rtc::ThreadManager::Instance()->WrapCurrentThread();
+      wraps_signaling_thread_ = true;
+    }
+  }
+  if (!network_manager_) {
+    owned_network_manager_.reset(new rtc::BasicNetworkManager());
+    network_manager_ = owned_network_manager_.get();
+  }
+  if (!socket_factory_) {
+    owned_socket_factory_.reset(
+        new rtc::BasicPacketSocketFactory(network_thread_));
+    socket_factory_ = owned_socket_factory_.get();
+  }
+}
+
+OrtcFactory::~OrtcFactory() {
+  RTC_DCHECK_RUN_ON(signaling_thread_);
+  if (wraps_signaling_thread_) {
+    rtc::ThreadManager::Instance()->UnwrapCurrentThread();
+  }
+}
+
+std::unique_ptr<UdpTransportInterface> OrtcFactory::CreateUdpTransport(
+    int family,
+    uint16_t min_port,
+    uint16_t max_port) {
+  if (!network_thread_->IsCurrent()) {
+    RTC_DCHECK_RUN_ON(signaling_thread_);
+    return network_thread_->Invoke<std::unique_ptr<UdpTransportInterface>>(
+        RTC_FROM_HERE, rtc::Bind(&OrtcFactory::CreateUdpTransport, this, family,
+                                 min_port, max_port));
+  }
+  std::unique_ptr<rtc::AsyncPacketSocket> socket(
+      socket_factory_->CreateUdpSocket(
+          rtc::SocketAddress(rtc::GetAnyIP(family), 0), min_port, max_port));
+  if (!socket) {
+    LOG(LS_WARNING) << "Local socket allocation failure.";
+    return nullptr;
+  }
+  LOG(LS_INFO) << "Created UDP socket with address "
+               << socket->GetLocalAddress().ToSensitiveString() << ".";
+  // Use proxy so that calls to the returned object are invoked on the network
+  // thread.
+  return UdpTransportProxy::Create(
+      signaling_thread_, network_thread_,
+      new cricket::UdpTransport(std::string(), std::move(socket)));
+}
+
+}  // namespace webrtc