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server.c

/*
 * $Id: server.c,v 1.1 2002-10-14 10:31:36 cvs Exp $
 */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <string.h>
#include <unistd.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>


#include "gssTunnel.h"

int
create_socket(int *dataFd, int *cbPort)
{

      struct sockaddr_in me, him;
#if defined(sun) || defined(sgi) || defined (__alpha)
      size_t          addrSize;
#else
      socklen_t       addrSize;
#endif
      int             bindResult;
      int             newFd;
      struct hostent *he;

      char           *hostName;



      hostName = (char *) malloc(MAXHOSTNAMELEN + 1);
      if (hostName == NULL) {
            *dataFd = -1;
            return -1;

      }
      hostName[MAXHOSTNAMELEN] = '\0';

      if (gethostname(hostName, MAXHOSTNAMELEN) < 0) {
            printf("Failed to get local host name.\n");
            *dataFd = -1;
            return -1;
      }
      /* trying to get full fully-qualified domain name. */
      he = (struct hostent *) gethostbyname((const char *) hostName);

      if (he != NULL) {
            /* if we successed to get it, let use it */
            free(hostName);
            hostName = (char *) strdup(he->h_name);
      } else {
            printf("Unable to get FQDN for host %s.\n", hostName);
      }

      printf("Setting hostname to %s.\n", hostName);


      *dataFd = socket(AF_INET, SOCK_STREAM, 0);
      if (*dataFd < 0) {
            return *dataFd;
      }
      memset((char *) &me, 0, sizeof(me));
      me.sin_family = AF_INET;
      me.sin_addr.s_addr = htonl(INADDR_ANY);
      me.sin_port = htons(*cbPort);

      addrSize = sizeof(me);
      bindResult = bind(*dataFd, (struct sockaddr *) & me, addrSize);
      if (bindResult < 0) {
            close(*dataFd);
            *dataFd = -1;
            return -1;
      }
      if (*cbPort == 0) {
            /* get our TCP port number */
#if defined(sun) || defined(sgi) || defined(__alpha)
            getsockname(*dataFd, (struct sockaddr *) & me, (int *) &addrSize);
#else
            getsockname(*dataFd, (struct sockaddr *) & me, (socklen_t *) & addrSize);
#endif
            *cbPort = ntohs(me.sin_port);
      }
      listen(*dataFd, 512);
      addrSize = sizeof(him);
      newFd = accept(*dataFd, (struct sockaddr *) & him, (int *) &addrSize);
      close(*dataFd);
      *dataFd = newFd;
      return *cbPort;

}



int
main(int argc, char *argv[])
{
      int             rc;
      int             port;
      int             sock;

      if (argc != 2) {
            printf("Usage %s <port>\n", argv[0]);
            exit(1);
      }
      port = atoi(argv[1]);

      create_socket(&sock, &port);


      gss_check(sock );
      
      close(sock);
      return 0;

}

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