TcpClientSocketWin may detect EOF before the last asynchronous I/O

net/socket/tcp_client_socket_win.cc

 // Copyright (c) 2011 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_client_socket_win.h"
 
 #include <mstcpip.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 571 matching lines @@
 
   previously_disconnected_ = true;
 }
 
 bool TCPClientSocketWin::IsConnected() const {
   DCHECK(CalledOnValidThread());
 
   if (socket_ == INVALID_SOCKET || waiting_connect())
     return false;
 
+  if (waiting_read_ || waiting_write_)
+    return true;

[wtc, 2011/09/30 19:02:43]

Any change we make to TCPClientSocketWin::IsConnected should
also be made to the closely-related function
TCPClientSocketWin::IsConnectedAndIdle below.

I will request more debugging info in the bug report.

[Takashi Toyoshima, 2011/10/04 03:38:35]

Done.

+
   // Check if connection is alive.
   char c;
   int rv = recv(socket_, &c, 1, MSG_PEEK);
   if (rv == 0)
     return false;
   if (rv == SOCKET_ERROR && WSAGetLastError() != WSAEWOULDBLOCK)
     return false;
 
   return true;
 }
@@ skipping 296 matching lines @@
         use_history_.set_was_used_to_convey_data();
       net_log_.AddByteTransferEvent(NetLog::TYPE_SOCKET_BYTES_SENT, num_bytes,
                                     core_->write_buffer_.buf);
     }
   }
   core_->write_iobuffer_ = NULL;
   DoWriteCallback(rv);
 }
 
 }  // namespace net