1 /*

     2  * Copyright (c) 2000, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * 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 }