Move server socket functionality from TCPServerSocket into TCPSocket.

net/socket/tcp_server_socket.cc

Index: net/socket/tcp_server_socket.cc
diff --git a/net/socket/tcp_server_socket.cc b/net/socket/tcp_server_socket.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1e91a64d5d0b2f45e5c18ee5d0f20d99958f5a00
--- /dev/null
+++ b/net/socket/tcp_server_socket.cc
@@ -0,0 +1,123 @@
+// Copyright (c) 2013 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 "net/socket/tcp_server_socket.h"
+
+#include "base/bind.h"
+#include "base/bind_helpers.h"
+#include "base/logging.h"
+#include "build/build_config.h"
+#include "net/base/net_errors.h"
+#include "net/socket/tcp_client_socket.h"
+
+namespace net {
+
+TCPServerSocket::TCPServerSocket(NetLog* net_log, const NetLog::Source& source)
+    : socket_(net_log, source),
+      pending_accept_(false) {
+}
+
+TCPServerSocket::~TCPServerSocket() {
+}
+
+int TCPServerSocket::Listen(const IPEndPoint& address, int backlog) {
+  int result = socket_.Create(address.GetFamily());
+  if (result != OK)
+    return result;
+
+  result = socket_.SetDefaultOptionsForServer();
+  if (result != OK) {
+    socket_.Close();
+    return result;
+  }
+
+  result = socket_.Bind(address);
+  if (result != OK) {
+    socket_.Close();
+    return result;
+  }
+
+  result = socket_.Listen(backlog);
+  if (result != OK) {
+    socket_.Close();
+    return result;
+  }
+
+  return OK;
+}
+
+int TCPServerSocket::GetLocalAddress(IPEndPoint* address) const {
+  return socket_.GetLocalAddress(address);
+}
+
+int TCPServerSocket::Accept(scoped_ptr<StreamSocket>* socket,
+                            const CompletionCallback& callback) {
+  DCHECK(socket);
+  DCHECK(!callback.is_null());
+
+  if (pending_accept_) {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  // It is safe to use base::Unretained(this). |socket_| is owned by this class,
+  // and the callback won't be run after |socket_| is destroyed.
+  CompletionCallback accept_callback =
+      base::Bind(&TCPServerSocket::OnAcceptCompleted, base::Unretained(this),
+                 socket, callback);
+  int result = socket_.Accept(&accepted_socket_, &accepted_address_,
+                              accept_callback);
+  if (result != ERR_IO_PENDING) {
+    // |accept_callback| won't be called so we need to run
+    // ConvertAcceptedSocket() ourselves in order to do the conversion from
+    // |accepted_socket_| to |socket|.
+    result = ConvertAcceptedSocket(result, socket);
+  } else {
+    pending_accept_ = true;
+  }
+
+  return result;
+}
+
+int TCPServerSocket::ConvertAcceptedSocket(
+    int result,
+    scoped_ptr<StreamSocket>* output_accepted_socket) {
+  // Make sure the TCPSocket object is destroyed in any case.
+  scoped_ptr<TCPSocket> temp_accepted_socket(accepted_socket_.Pass());
+  if (result != OK)
+    return result;
+
+  scoped_ptr<TCPClientSocket> client_socket(new TCPClientSocket(
+      AddressList(accepted_address_),
+      temp_accepted_socket->net_log().net_log(),
+      temp_accepted_socket->net_log().source()));
+  // TODO(yzshen): Once we switch TCPClientSocket::AdoptSocket() to take a
+  // TCPSocket object, we don't need to do platform-specific handling.
+#if defined(OS_WIN)
+  SOCKET raw_socket = temp_accepted_socket->Release();
+#elif defined(OS_POSIX)
+  int raw_socket = temp_accepted_socket->Release();
+#endif
+  result = client_socket->AdoptSocket(raw_socket);
+  if (result != OK) {
+    // |client_socket| won't take ownership of |raw_socket| on failure.
+    // Therefore, we put it back into |temp_accepted_socket| to close it.
+    temp_accepted_socket->Adopt(raw_socket);
+    return result;
+  }
+
+  *output_accepted_socket = client_socket.Pass();
+  return OK;
+}
+
+void TCPServerSocket::OnAcceptCompleted(
+    scoped_ptr<StreamSocket>* output_accepted_socket,
+    const CompletionCallback& forward_callback,
+    int result) {
+  result = ConvertAcceptedSocket(result, output_accepted_socket);
+  pending_accept_ = false;
+  forward_callback.Run(result);
+}
+
+}  // namespace net