1 /*
   2  * Copyright 2000 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 #include <iostream>
  26 #include <winsock2.h>
  27 
  28 using namespace std;
  29 
  30 void
  31 initWinsock()
  32 {
  33   static int initted = 0;
  34   WORD wVersionRequested;
  35   WSADATA wsaData;
  36   int err;
  37 
  38   if (!initted) {
  39     wVersionRequested = MAKEWORD( 2, 0 );
  40 
  41     err = WSAStartup( wVersionRequested, &wsaData );
  42     if ( err != 0 ) {
  43       {
  44         /* Tell the user that we couldn't find a usable */
  45         /* WinSock DLL.                                 */
  46         cerr << "SocketBase::SocketBase: unable to find usable "
  47              << "WinSock DLL" << endl;
  48         exit(1);
  49       }
  50     }
  51 
  52     /* Confirm that the WinSock DLL supports 2.0.*/
  53     /* Note that if the DLL supports versions greater    */
  54     /* than 2.0 in addition to 2.0, it will still return */
  55     /* 2.0 in wVersion since that is the version we      */
  56     /* requested.                                        */
  57 
  58     if ( LOBYTE( wsaData.wVersion ) != 2 ||
  59          HIBYTE( wsaData.wVersion ) != 0 ) {
  60       /* Tell the user that we couldn't find a usable */
  61       /* WinSock DLL.                                  */
  62       {
  63         cerr << "Unable to find suitable version of WinSock DLL" << endl;
  64         WSACleanup( );
  65         exit(1);
  66       }
  67     }
  68 
  69     initted = 1;
  70   }
  71 }