If an idle socket has received data unexpectedly, we...

net/base/ssl_client_socket_mac.cc

 // Copyright (c) 2008 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/base/ssl_client_socket_mac.h"
 
 #include "base/singleton.h"
 #include "base/string_util.h"
 #include "net/base/net_errors.h"
 #include "net/base/ssl_info.h"
@@ skipping 289 matching lines @@
 bool SSLClientSocketMac::IsConnected() const {
   // Ideally, we should also check if we have received the close_notify alert
   // message from the server, and return false in that case.  We're not doing
   // that, so this function may return a false positive.  Since the upper
   // layer (HttpNetworkTransaction) needs to handle a persistent connection
   // closed by the server when we send a request anyway, a false positive in
   // exchange for simpler code is a good trade-off.
   return completed_handshake_ && transport_->IsConnected();
 }
 
+bool SSLClientSocketMac::IsConnectedAndIdle() const {
+  // Unlike IsConnected, this method doesn't return a false positive.
+  //
+  // Strictly speaking, we should check if we have received the close_notify
+  // alert message from the server, and return false in that case.  Although
+  // the close_notify alert message means EOF in the SSL layer, it is just
+  // bytes to the transport layer below, so transport_->IsConnectedAndIdle()
+  // returns the desired false when we receive close_notify.
+  return completed_handshake_ && transport_->IsConnectedAndIdle();
+}
+
 int SSLClientSocketMac::Read(char* buf, int buf_len,
                              CompletionCallback* callback) {
   DCHECK(completed_handshake_);
   DCHECK(next_state_ == STATE_NONE);
   DCHECK(!user_callback_);
 
   user_buf_ = buf;
   user_buf_len_ = buf_len;
 
   next_state_ = STATE_PAYLOAD_READ;
@@ skipping 427 matching lines @@
   if (rv < 0 && rv != ERR_IO_PENDING) {
     return OSStatusFromNetError(rv);
   }
   
   // always lie to our caller
   return noErr;
 }
 
 }  // namespace net