pwinsock.c

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/*--------------------------------------------------------------------*/
/*       p w i n s o c k . c                                          */
/*                                                                    */
/*       WinSock support for Windows 3.1                              */
/*--------------------------------------------------------------------*/

/*--------------------------------------------------------------------*/
/*    Copyright (c) David M. Watt 1993, All Right Reserved            */
/*--------------------------------------------------------------------*/

/*--------------------------------------------------------------------*/
/*    Changes Copyright (c) 1989-1993 by Kendra Electronic            */
/*    Wonderworks.                                                    */
/*                                                                    */
/*    All rights reserved except those explicitly granted by the      */
/*    UUPC/extended license agreement.                                */
/*--------------------------------------------------------------------*/

/*--------------------------------------------------------------------*/
/*                          RCS Information                           */
/*--------------------------------------------------------------------*/

/*
 *    $Id: pwinsock.c 1.2 1993/09/27 00:45:20 ahd Exp $
 *
 *    $Log: pwinsock.c $
 * Revision 1.2  1993/09/27  00:45:20  ahd
 * Add missing def for shutdown()
 *
 * Revision 1.1  1993/09/20  04:39:51  ahd
 * Initial revision
 *
 */

/*--------------------------------------------------------------------*/
/*                        System include files                        */
/*--------------------------------------------------------------------*/

#include <stdio.h>
#include <windows.h>
#include "winsock.h"

/*--------------------------------------------------------------------*/
/*                    UUPC/extended include files                     */
/*--------------------------------------------------------------------*/

#include "lib.h"
#include "pwinsock.h"      // definitions for 16 bit Winsock functions

/*--------------------------------------------------------------------*/
/*                  Define pointers to the functions                  */
/*--------------------------------------------------------------------*/

int PASCAL FAR (*pWSAStartup)(WORD wVersionRequired, LPWSADATA lpWSAData);

int PASCAL FAR (*pWSACleanup)(void);

int PASCAL FAR (*pWSAGetLastError)(void);

BOOL PASCAL FAR (*pWSAIsBlocking)(void);

int PASCAL FAR (*pWSACancelBlockingCall)(void);

struct hostent FAR * PASCAL FAR (*pgethostbyname)(const char FAR * name);

struct servent FAR * PASCAL FAR (*pgetservbyname)(const char FAR * name,
                                                  const char FAR * proto);

unsigned long PASCAL FAR (*pinet_addr)(const char FAR * cp);

SOCKET PASCAL FAR (*psocket)(int af,
                             int type,
                             int protocol);

int PASCAL FAR (*pconnect)(SOCKET s,
                           const struct sockaddr FAR *name,
                           int namelen);

SOCKET PASCAL FAR (*paccept)(SOCKET s,
                             struct sockaddr FAR *addr,
                             int FAR *addrlen);

int PASCAL FAR (*plisten) (SOCKET s, int backlog);

int PASCAL FAR (*bind)(SOCKET s,
                       const struct sockaddr FAR *addr,
                       int namelen);

int PASCAL FAR (*pselect)(int nfds,
                          fd_set FAR *readfds,
                          fd_set FAR *writefds,
                          fd_set FAR *exceptfds,
                          const struct timeval FAR *timeout);

int PASCAL FAR (*psend)(SOCKET s,
                        const char FAR * buf,
                        int len,
                        int flags);

int PASCAL FAR (*precv) (SOCKET s,
                         char FAR * buf,
                         int len,
                         int flags);

int PASCAL FAR (*pclosesocket)(SOCKET s);

u_short PASCAL FAR (*pntohs)(u_short netshort);

u_long PASCAL FAR (*phtonl) (u_long hostlong);

u_long PASCAL FAR (*pntohl) (u_long netlong);

int PASCAL FAR (*pshutdown) (SOCKET s, int how);

/*--------------------------------------------------------------------*/
/*                          Local variables                           */
/*--------------------------------------------------------------------*/

static HINSTANCE hWinsock = NULL;

currentfile();

/*--------------------------------------------------------------------*/
/*       p W i n S o c k I n i t                                      */
/*                                                                    */
/*       Initialize winsock.dll for Windows 3.1                       */
/*--------------------------------------------------------------------*/

boolean pWinSockInit( void )
{

/*--------------------------------------------------------------------*/
/*                          Load the library                          */
/*--------------------------------------------------------------------*/

   if (!hWinsock)
      hWinsock = LoadLibrary("WINSOCK.DLL");
   else {
      printmsg(0,"pWinSockInit: called twice with no termination");
      panic();
   }


   if (!hWinsock)
   {
      printmsg(0, "pWinSockInit: could not find Winsock.DLL");
      return FALSE;
   }

/*--------------------------------------------------------------------*/
/*       Initialize pointers to functions with in the libraries       */
/*--------------------------------------------------------------------*/

#ifdef __TURBOC__
#pragma warn -sus
#endif

   paccept                = GetProcAddress(hWinsock, (LPSTR)MAKELONG(  1,0));
   pbind                  = GetProcAddress(hWinsock, (LPSTR)MAKELONG(  2,0));
   pclosesocket           = GetProcAddress(hWinsock, (LPSTR)MAKELONG(  3,0));
   pconnect               = GetProcAddress(hWinsock, (LPSTR)MAKELONG(  4,0));
   phtonl                 = GetProcAddress(hWinsock, (LPSTR)MAKELONG(  8,0));
   pinet_addr             = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 10,0));
   plisten                = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 13,0));
   pntohl                 = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 14,0));
   pntohs                 = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 15,0));
   precv                  = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 16,0));
   pselect                = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 18,0));
   psend                  = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 19,0));
   pshutdown              = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 22,0));
   psocket                = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 23,0));
   pgethostbyname         = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 52,0));
   pgetservbyname         = GetProcAddress(hWinsock, (LPSTR)MAKELONG( 55,0));
   pWSAGetLastError       = GetProcAddress(hWinsock, (LPSTR)MAKELONG(111,0));
   pWSACancelBlockingCall = GetProcAddress(hWinsock, (LPSTR)MAKELONG(113,0));
   pWSAIsBlocking         = GetProcAddress(hWinsock, (LPSTR)MAKELONG(114,0));
   pWSAStartup            = GetProcAddress(hWinsock, (LPSTR)MAKELONG(115,0));
   pWSACleanup            = GetProcAddress(hWinsock, (LPSTR)MAKELONG(116,0));

#ifdef __TURBOC__
#pragma warn .sus
#endif

   return TRUE;

} /* pWinSockInit */

/*--------------------------------------------------------------------*/
/*       p W i n S o c k E x i t                                      */
/*                                                                    */
/*       Clean up Windows 3.x winsock.dll                             */
/*--------------------------------------------------------------------*/

void pWinSockExit( void )
{

   if (hWinsock)
   {
      FreeLibrary(hWinsock);
      hWinsock = (HINSTANCE) NULL;
   }

} /* pWinSockExit */