usr/src/cmd/ipf/lib/common/checkrev.c

   1 /*
   2  * Copyright (C) 1993-2001 by Darren Reed.
   3  *
   4  * See the IPFILTER.LICENCE file for details on licencing.
   5  *
   6  * $Id: checkrev.c,v 1.12.2.1 2004/03/09 14:44:39 darrenr Exp $
   7  */
   8
   9 #include <sys/ioctl.h>
  10 #include <fcntl.h>
  11
  12 #include "ipf.h"
  13 #include "netinet/ipl.h"
  14
  15 int checkrev(ipfname)
  16 char *ipfname;
  17 {
  18         static int vfd = -1;
  19         struct friostat fio, *fiop = &fio;
  20         ipfobj_t ipfo;
  21
  22         bzero((caddr_t)&ipfo, sizeof(ipfo));
  23         ipfo.ipfo_rev = IPFILTER_VERSION;
  24         ipfo.ipfo_size = sizeof(*fiop);
  25         ipfo.ipfo_ptr = (void *)fiop;
  26         ipfo.ipfo_type = IPFOBJ_IPFSTAT;
  27
  28         if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
  29                 perror("open device");
  30                 return -1;
  31         }
  32
  33         if (ioctl(vfd, SIOCGETFS, &ipfo)) {
  34                 perror("ioctl(SIOCGETFS)");
  35                 close(vfd);
  36                 vfd = -1;
  37                 return -1;
  38         }
  39
  40         if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
  41                 return -1;
  42         }
  43         return 0;
  44 }