Proxy support for P2P TCP Socket

content/browser/renderer_host/p2p/socket_host_tcp.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/p2p/socket_host_tcp.h"
 
 #include "base/sys_byteorder.h"
 #include "content/common/p2p_messages.h"
 #include "ipc/ipc_sender.h"
+#include "jingle/glue/proxy_resolving_client_socket.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
 #include "net/socket/tcp_client_socket.h"
 
 namespace {
 
 typedef uint16 PacketLength;
 const int kPacketHeaderSize = sizeof(PacketLength);
 const int kReadBufferSize = 4096;
 const int kPacketLengthOffset = 2;
 const int kTurnChannelDataHeaderSize = 4;
 
 }  // namespace
 
 namespace content {
 
+namespace {
+
+net::StreamSocket* CreateSocket(

[Sergey Ulanov, 2013/06/20 01:50:02]

This function is called in only one place and it just creates new
ProxyResolvingClientSocket(), so I think you don't really need it.

[Mallinath (Gone from Chromium), 2013/06/20 05:24:15]

Done.

+    const net::HostPortPair& host_and_port,
+    const scoped_refptr<net::URLRequestContextGetter>& request_context_getter) {
+  // The default SSLConfig is good enough for us for now.
+  const net::SSLConfig ssl_config;
+  return new jingle_glue::ProxyResolvingClientSocket(
+      NULL,     // Default socket pool provided by the net::Proxy.
+      request_context_getter,
+      ssl_config,
+      host_and_port);
+}
+
+}  // namespace
+
 P2PSocketHostTcpBase::P2PSocketHostTcpBase(IPC::Sender* message_sender,
-                                           int id)
+                                           int id,
+                                           net::URLRequestContextGetter* getter)
     : P2PSocketHost(message_sender, id),
+      //weak_ptr_factory_(this),
       write_pending_(false),
-      connected_(false) {
+      connected_(false),
+      context_getter_(getter) {
 }
 
 P2PSocketHostTcpBase::~P2PSocketHostTcpBase() {
   if (state_ == STATE_OPEN) {
     DCHECK(socket_.get());
     socket_.reset();
   }
 }
 
 bool P2PSocketHostTcpBase::InitAccepted(const net::IPEndPoint& remote_address,
                                         net::StreamSocket* socket) {
   DCHECK(socket);
   DCHECK_EQ(state_, STATE_UNINITIALIZED);
 
   remote_address_ = remote_address;
   socket_.reset(socket);
   state_ = STATE_OPEN;
   DoRead();
   return state_ != STATE_ERROR;
 }
 
 bool P2PSocketHostTcpBase::Init(const net::IPEndPoint& local_address,
-                            const net::IPEndPoint& remote_address) {
+                                const net::IPEndPoint& remote_address) {
   DCHECK_EQ(state_, STATE_UNINITIALIZED);
 
   remote_address_ = remote_address;
   state_ = STATE_CONNECTING;
-  scoped_ptr<net::TCPClientSocket> tcp_socket(new net::TCPClientSocket(
-      net::AddressList(remote_address),
-      NULL, net::NetLog::Source()));
-  if (tcp_socket->Bind(local_address) != net::OK) {
-    OnError();
-    return false;
-  }
-  socket_.reset(tcp_socket.release());
 
-  int result = socket_->Connect(
-      base::Bind(&P2PSocketHostTcp::OnConnected, base::Unretained(this)));
-  if (result != net::ERR_IO_PENDING) {
-    OnConnected(result);
+  net::HostPortPair dest_host_port_pair =
+      net::HostPortPair::FromIPEndPoint(remote_address);
+  // TODO(mallinath) - We are ignoring local_address altogether. We should
+  // find a way to inject this into ProxyResolvingClientSocket. This could be
+  // a problem on multi-homed host.
+  socket_.reset(CreateSocket(dest_host_port_pair, context_getter_));
+
+  int status = socket_->Connect(
+      base::Bind(&P2PSocketHostTcpBase::OnConnected,
+                 base::Unretained(this)));
+  if (status != net::ERR_IO_PENDING) {
+    // We defer execution of ProcessConnectDone instead of calling it
+    // directly here as the caller may not expect an error/close to
+    // happen here.  This is okay, as from the caller's point of view,
+    // the connect always happens asynchronously.
+    base::MessageLoop* message_loop = base::MessageLoop::current();
+    CHECK(message_loop);
+    message_loop->PostTask(
+        FROM_HERE,
+        base::Bind(&P2PSocketHostTcpBase::OnConnected,
+                   base::Unretained(this), status));
   }
 
   return state_ != STATE_ERROR;
 }
 
 void P2PSocketHostTcpBase::OnError() {
   socket_.reset();
 
   if (state_ == STATE_UNINITIALIZED || state_ == STATE_CONNECTING ||
       state_ == STATE_OPEN) {
@@ skipping 183 matching lines @@
     pos += consumed;
   }
   // We've consumed all complete packets from the buffer; now move any remaining
   // bytes to the head of the buffer and set offset to reflect this.
   if (pos && pos <= read_buffer_->offset()) {
     memmove(head, head + pos, read_buffer_->offset() - pos);
     read_buffer_->set_offset(read_buffer_->offset() - pos);
   }
 }
 
-P2PSocketHostTcp::P2PSocketHostTcp(IPC::Sender* message_sender, int id)
-    : P2PSocketHostTcpBase(message_sender, id) {
+P2PSocketHostTcp::P2PSocketHostTcp(IPC::Sender* message_sender, int id,
+                                   net::URLRequestContextGetter* getter)
+    : P2PSocketHostTcpBase(message_sender, id, getter) {
 }
 
 P2PSocketHostTcp::~P2PSocketHostTcp() {
 }
 
 int P2PSocketHostTcp::ProcessInput(char* input, int input_len) {
   if (input_len < kPacketHeaderSize)
     return 0;
   int packet_size = base::NetToHost16(*reinterpret_cast<uint16*>(input));
   if (input_len < packet_size + kPacketHeaderSize)
@@ skipping 13 matching lines @@
   scoped_refptr<net::DrainableIOBuffer> buffer =
       new net::DrainableIOBuffer(new net::IOBuffer(size), size);
   *reinterpret_cast<uint16*>(buffer->data()) = base::HostToNet16(data.size());
   memcpy(buffer->data() + kPacketHeaderSize, &data[0], data.size());
 
   WriteOrQueue(buffer);
 }
 
 // P2PSocketHostStunTcp
 P2PSocketHostStunTcp::P2PSocketHostStunTcp(IPC::Sender* message_sender,
-                                           int id)
-    : P2PSocketHostTcpBase(message_sender, id) {
+                                           int id,
+                                           net::URLRequestContextGetter* getter)
+    : P2PSocketHostTcpBase(message_sender, id, getter) {
 }
 
 P2PSocketHostStunTcp::~P2PSocketHostStunTcp() {
 }
 
 int P2PSocketHostStunTcp::ProcessInput(char* input, int input_len) {
   if (input_len < kPacketHeaderSize + kPacketLengthOffset)
     return 0;
 
   int pad_bytes;
@@ skipping 66 matching lines @@
   } else {
     packet_size += kTurnChannelDataHeaderSize;
     // Calculate any padding if present.
     if (packet_size % 4)
       *pad_bytes = 4 - packet_size % 4;
   }
   return packet_size;
 }
 
 }  // namespace content