/*
 * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
 * 
 * This code is derived from software contributed to The DragonFly Project
 * by Sepherosa Ziehau <sepherosa@gmail.com>
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * $DragonFly: src/sys/net/ipfw/ip_fw2_glue.c,v 1.3 2008/09/13 10:23:39 sephe Exp $
 */

#include <sys/param.h>
#include <sys/socketvar.h>

#include <net/if.h>
#include <net/netisr.h>
#include <net/netmsg2.h>

#include <netinet/in.h>

#include <net/ipfw/ip_fw2.h>

ip_fw_chk_t *ip_fw_chk_ptr;
ip_fw_dn_io_t *ip_fw_dn_io_ptr;
int ip_fw_loaded;
int fw_enable = 1;
int fw_one_pass = 1;

static void	ip_fw_sockopt_dispatch(struct netmsg *);

int
ip_fw_sockopt(struct sockopt *sopt)
{
	struct netmsg smsg;

	/*
	 * Disallow modifications in really-really secure mode, but still allow
	 * the logging counters to be reset.
	 */
	if (sopt->sopt_name == IP_FW_ADD ||
	    (sopt->sopt_dir == SOPT_SET && sopt->sopt_name != IP_FW_RESETLOG)) {
		if (securelevel >= 3)
			return EPERM;
	}

	netmsg_init(&smsg, &curthread->td_msgport, 0, ip_fw_sockopt_dispatch);
	smsg.nm_lmsg.u.ms_resultp = sopt;
	return lwkt_domsg(IPFW_CFGPORT, &smsg.nm_lmsg, 0);
}

static void
ip_fw_sockopt_dispatch(struct netmsg *nmsg)
{
	struct lwkt_msg *msg = &nmsg->nm_lmsg;
	struct sockopt *sopt = msg->u.ms_resultp;
	int error;

	KKASSERT(mycpuid == 0);

	if (IPFW_LOADED)
		error = ip_fw_ctl_ptr(sopt);
	else
		error = ENOPROTOOPT;
	lwkt_replymsg(msg, error);
}