dist/ipf/lib/getnattype.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2002-2004 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  * Added redirect stuff and a variety of bug fixes. (mcn@EnGarde.com)
   9  */
  10 #include "ipf.h"
  11 #include "kmem.h"
  12
  13 #if !defined(lint)
  14 static const char rcsid[] = "@(#)Id: getnattype.c,v 1.3.2.2 2006/07/14 06:12:24 darrenr Exp";
  15 #endif
  16
  17
  18 /*
  19  * Get a nat filter type given its kernel address.
  20  */
  21 char *getnattype(nat, alive)
  22 nat_t *nat;
  23 int alive;
  24 {
  25         static char unknownbuf[20];
  26         ipnat_t *ipn, ipnat;
  27         char *which;
  28         int type;
  29
  30         if (!nat)
  31                 return "???";
  32         if (alive) {
  33                 type = nat->nat_redir;
  34         } else {
  35                 ipn = nat->nat_ptr;
  36                 if (kmemcpy((char *)&ipnat, (long)ipn, sizeof(ipnat)))
  37                         return "!!!";
  38                 type = ipnat.in_redir;
  39         }
  40
  41         switch (type)
  42         {
  43         case NAT_MAP :
  44                 which = "MAP";
  45                 break;
  46         case NAT_MAPBLK :
  47                 which = "MAP-BLOCK";
  48                 break;
  49         case NAT_REDIRECT :
  50                 which = "RDR";
  51                 break;
  52         case NAT_BIMAP :
  53                 which = "BIMAP";
  54                 break;
  55         default :
  56                 sprintf(unknownbuf, "unknown(%04x)", type & 0xffffffff);
  57                 which = unknownbuf;
  58                 break;
  59         }
  60         return which;
  61 }