Reimplements net::AddressList without struct addrinfo.

net/socket/tcp_client_socket_libevent.h

 // 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.
 
 #ifndef NET_SOCKET_TCP_CLIENT_SOCKET_LIBEVENT_H_
 #define NET_SOCKET_TCP_CLIENT_SOCKET_LIBEVENT_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 105 matching lines @@
 
     DISALLOW_COPY_AND_ASSIGN(WriteWatcher);
   };
 
   // State machine used by Connect().
   int DoConnectLoop(int result);
   int DoConnect();
   int DoConnectComplete(int result);
 
   // Helper used by Disconnect(), which disconnects minus the logging and
-  // resetting of current_ai_.
+  // resetting of current_address_index_.
   void DoDisconnect();
 
   void DoReadCallback(int rv);
   void DoWriteCallback(int rv);
   void DidCompleteRead();
   void DidCompleteWrite();
   void DidCompleteConnect();
 
   // Returns true if a Connect() is in progress.
   bool waiting_connect() const {
@@ skipping 11 matching lines @@
   // Local IP address and port we are bound to. Set to NULL if Bind()
   // was't called (in that cases OS chooses address/port).
   scoped_ptr<IPEndPoint> bind_address_;
 
   // Stores bound socket between Bind() and Connect() calls.
   int bound_socket_;
 
   // The list of addresses we should try in order to establish a connection.
   AddressList addresses_;
 
-  // Where we are in above list, or NULL if all addrinfos have been tried.
-  const struct addrinfo* current_ai_;
+  // Where we are in above list. Set to -1 if uninitialized.
+  int current_address_index_;
 
   // The socket's libevent wrappers
   MessageLoopForIO::FileDescriptorWatcher read_socket_watcher_;
   MessageLoopForIO::FileDescriptorWatcher write_socket_watcher_;
 
   // The corresponding watchers for reads and writes.
   ReadWatcher read_watcher_;
   WriteWatcher write_watcher_;
 
   // The buffer used by OnSocketReady to retry Read requests
@@ skipping 34 matching lines @@
   base::TimeTicks connect_start_time_;
   base::TimeDelta connect_time_micros_;
   int64 num_bytes_read_;
 
   DISALLOW_COPY_AND_ASSIGN(TCPClientSocketLibevent);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_TCP_CLIENT_SOCKET_LIBEVENT_H_