dist/ipf/lib/checkrev.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2000-2004 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * Id: checkrev.c,v 1.12.2.2 2006/06/16 17:20:56 darrenr Exp
   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, *fiop = &fio;
  22         ipfobj_t ipfo;
  23
  24         bzero((caddr_t)&ipfo, sizeof(ipfo));
  25         ipfo.ipfo_rev = IPFILTER_VERSION;
  26         ipfo.ipfo_size = sizeof(*fiop);
  27         ipfo.ipfo_ptr = (void *)fiop;
  28         ipfo.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, &ipfo)) {
  36                 perror("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 }