dist/ipf/mlo_rule.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 1993-2001 by Darren Reed.
   5  *
   6  * See the IPFILTER.LICENCE file for details on licencing.
   7  *
   8  */
   9
  10 #include <sys/param.h>
  11 #include <sys/systm.h>
  12 #include <sys/conf.h>
  13 #include <sys/proc.h>
  14 #include <sys/ioctl.h>
  15 #include <sys/kernel.h>
  16 #include <sys/mbuf.h>
  17 #include <sys/exec.h>
  18 #include <sys/socket.h>
  19 #include <net/if.h>
  20 #include <netinet/in_systm.h>
  21 #include <netinet/in.h>
  22 #include <netinet/ip.h>
  23 #include <net/route.h>
  24 #include <netinet/ip_var.h>
  25 #include <netinet/tcp.h>
  26 #include <netinet/tcpip.h>
  27 #include <sys/lkm.h>
  28 #include "ip_compat.h"
  29 #include "ip_fil.h"
  30 #include "ip_rules.h"
  31
  32
  33 #ifdef  IPFILTER_LKM
  34
  35 static int ipfruleaction __P((struct lkm_table *, int));
  36
  37 int     ipfrule __P((struct lkm_table *, int, int));
  38
  39
  40 MOD_MISC("IPFilter Rules");
  41
  42 int ipfrule(lkmtp, cmd, ver)
  43 struct lkm_table *lkmtp;
  44 int cmd, ver;
  45 {
  46         DISPATCH(lkmtp, cmd, ver, ipfruleaction, ipfruleaction, ipfruleaction);
  47 }
  48
  49 int lkmexists __P((struct lkm_table *)); /* defined in /sys/kern/kern_lkm.c */
  50
  51 static int ipfruleaction(lkmtp, cmd)
  52 struct lkm_table *lkmtp;
  53 int cmd;
  54 {
  55         int err = 0;
  56
  57         switch (cmd)
  58         {
  59         case LKM_E_LOAD :
  60                 if (lkmexists(lkmtp))
  61                         return EEXIST;
  62
  63                 err = ipfrule_add();
  64                 if (!err)
  65                         fr_refcnt++;
  66                 break;
  67         case LKM_E_UNLOAD :
  68                 err = ipfrule_remove();
  69                 if (!err)
  70                         fr_refcnt--;
  71                 break;
  72         case LKM_E_STAT :
  73                 break;
  74         default:
  75                 err = EIO;
  76                 break;
  77         }
  78         return err;
  79 }
  80 #endif  /* IPFILTER_LKM */