UDP sockets implementation for windows.

net/socket/tcp_client_socket_win.cc

 // Copyright (c) 2010 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"
 #include "base/memory_debug.h"
 #include "base/metrics/stats_counters.h"
 #include "base/string_util.h"
 #include "base/sys_info.h"
 #include "base/win/object_watcher.h"
 #include "net/base/address_list_net_log_param.h"
 #include "net/base/connection_type_histograms.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_log.h"
 #include "net/base/net_util.h"
 #include "net/base/network_change_notifier.h"
 #include "net/base/sys_addrinfo.h"
 #include "net/base/winsock_init.h"
+#include "net/base/winsock_util.h"
 
 namespace net {
 
 namespace {
 
-// Prevent the compiler from optimizing away the arguments so they appear
-// nicely on the stack in crash dumps.
-#pragma warning (disable: 4748)
-#pragma optimize( "", off )
-
-// Pass the important values as function arguments so that they are available
-// in crash dumps.
-void CheckEventWait(WSAEVENT hEvent, DWORD wait_rv, DWORD expected) {
-  if (wait_rv != expected) {
-    DWORD err = ERROR_SUCCESS;
-    if (wait_rv == WAIT_FAILED)
-      err = GetLastError();
-    CHECK(false);  // Crash.
-  }
-}
-
-#pragma optimize( "", on )
-#pragma warning (default: 4748)
-
-// Assert that the (manual-reset) event object is not signaled.
-void AssertEventNotSignaled(WSAEVENT hEvent) {
-  DWORD wait_rv = WaitForSingleObject(hEvent, 0);
-  CheckEventWait(hEvent, wait_rv, WAIT_TIMEOUT);
-}
-
-// If the (manual-reset) event object is signaled, resets it and returns true.
-// Otherwise, does nothing and returns false.  Called after a Winsock function
-// succeeds synchronously
-//
-// Our testing shows that except in rare cases (when running inside QEMU),
-// the event object is already signaled at this point, so we call this method
-// to avoid a context switch in common cases.  This is just a performance
-// optimization.  The code still works if this function simply returns false.
-bool ResetEventIfSignaled(WSAEVENT hEvent) {
-  // TODO(wtc): Remove the CHECKs after enough testing.
-  DWORD wait_rv = WaitForSingleObject(hEvent, 0);
-  if (wait_rv == WAIT_TIMEOUT)
-    return false;  // The event object is not signaled.
-  CheckEventWait(hEvent, wait_rv, WAIT_OBJECT_0);
-  BOOL ok = WSAResetEvent(hEvent);
-  CHECK(ok);
-  return true;
-}
-
-//-----------------------------------------------------------------------------
-
-int MapWinsockError(int os_error) {
-  // There are numerous Winsock error codes, but these are the ones we thus far
-  // find interesting.
-  switch (os_error) {
-    case WSAEACCES:
-      return ERR_ACCESS_DENIED;
-    case WSAENETDOWN:
-      return ERR_INTERNET_DISCONNECTED;
-    case WSAETIMEDOUT:
-      return ERR_TIMED_OUT;
-    case WSAECONNRESET:
-    case WSAENETRESET:  // Related to keep-alive
-      return ERR_CONNECTION_RESET;
-    case WSAECONNABORTED:
-      return ERR_CONNECTION_ABORTED;
-    case WSAECONNREFUSED:
-      return ERR_CONNECTION_REFUSED;
-    case WSA_IO_INCOMPLETE:
-    case WSAEDISCON:
-      // WSAEDISCON is returned by WSARecv or WSARecvFrom for message-oriented
-      // sockets (where a return value of zero means a zero-byte message) to
-      // indicate graceful connection shutdown.  We should not ever see this
-      // error code for TCP sockets, which are byte stream oriented.
-      LOG(DFATAL) << "Unexpected error " << os_error
-                  << " mapped to net::ERR_UNEXPECTED";
-      return ERR_UNEXPECTED;
-    case WSAEHOSTUNREACH:
-    case WSAENETUNREACH:
-      return ERR_ADDRESS_UNREACHABLE;
-    case WSAEADDRNOTAVAIL:
-      return ERR_ADDRESS_INVALID;
-    case ERROR_SUCCESS:
-      return OK;
-    default:
-      LOG(WARNING) << "Unknown error " << os_error
-                   << " mapped to net::ERR_FAILED";
-      return ERR_FAILED;
-  }
-}
-
 int MapConnectError(int os_error) {
   switch (os_error) {
     // connect fails with WSAEACCES when Windows Firewall blocks the
     // connection.
     case WSAEACCES:
       return ERR_NETWORK_ACCESS_DENIED;
     case WSAETIMEDOUT:
       return ERR_CONNECTION_TIMED_OUT;
     default: {
       int net_error = MapWinsockError(os_error);
@@ skipping 765 matching lines @@
         use_history_.set_was_used_to_convey_data();
       LogByteTransfer(net_log_, NetLog::TYPE_SOCKET_BYTES_SENT, num_bytes,
                       core_->write_buffer_.buf);
     }
   }
   core_->write_iobuffer_ = NULL;
   DoWriteCallback(rv);
 }
 
 }  // namespace net