mlo_rule.c

/*
 * Copyright (C) 2007 by Darren Reed.
 *
 * See the IPFILTER.LICENCE file for details on licencing.
 *
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/mbuf.h>
#include <sys/exec.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <net/route.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcpip.h>
#include <sys/lkm.h>
#include "ip_compat.h"
#include "ip_fil.h"
#include "ip_rules.h"


#ifdef	IPFILTER_LKM

static int ipfruleaction __P((struct lkm_table *, int));

int	ipfrule __P((struct lkm_table *, int, int));


MOD_MISC("IPFilter Rules");

int ipfrule(lkmtp, cmd, ver)
	struct lkm_table *lkmtp;
	int cmd, ver;
{
	DISPATCH(lkmtp, cmd, ver, ipfruleaction, ipfruleaction, ipfruleaction);
}

int lkmexists __P((struct lkm_table *)); /* defined in /sys/kern/kern_lkm.c */

static int ipfruleaction(lkmtp, cmd)
	struct lkm_table *lkmtp;
	int cmd;
{
	int err = 0;

	switch (cmd)
	{
	case LKM_E_LOAD :
		if (lkmexists(lkmtp))
			return EEXIST;

		err = ipfrule_add();
		if (!err)
			ipf_refcnt++;
		break;
	case LKM_E_UNLOAD :
		err = ipfrule_remove();
		if (!err)
			ipf_refcnt--;
		break;
	case LKM_E_STAT :
		break;
	default:
		err = EIO;
		break;
	}
	return err;
}
#endif	/* IPFILTER_LKM */