contrib/ipfilter/lib/checkrev.c

   1 /*      $FreeBSD$       */
   2
   3 /*
   4  * Copyright (C) 2012 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * $Id$
   9  */
  10
  11 #include <sys/ioctl.h>
  12 #include <fcntl.h>
  13
  14 #include "ipf.h"
  15 #include "netinet/ipl.h"
  16
  17 int checkrev(ipfname)
  18         char *ipfname;
  19 {
  20         static int vfd = -1;
  21         struct friostat fio;
  22         ipfobj_t obj;
  23
  24         bzero((caddr_t)&obj, sizeof(obj));
  25         obj.ipfo_rev = IPFILTER_VERSION;
  26         obj.ipfo_size = sizeof(fio);
  27         obj.ipfo_ptr = (void *)&fio;
  28         obj.ipfo_type = IPFOBJ_IPFSTAT;
  29
  30         if ((vfd == -1) && ((vfd = open(ipfname, O_RDONLY)) == -1)) {
  31                 perror("open device");
  32                 return -1;
  33         }
  34
  35         if (ioctl(vfd, SIOCGETFS, &obj)) {
  36                 ipferror(vfd, "ioctl(SIOCGETFS)");
  37                 close(vfd);
  38                 vfd = -1;
  39                 return -1;
  40         }
  41
  42         if (strncmp(IPL_VERSION, fio.f_version, sizeof(fio.f_version))) {
  43                 return -1;
  44         }
  45         return 0;
  46 }