/* ebt_arpreply

 *

 * Authors:

 * Grzegorz Borowiak <grzes@gnu.univ.gda.pl>

 * Bart De Schuymer <bdschuym@pandora.be>

 *

 *  August, 2003

 */

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <getopt.h>

#include <xtables.h>

#include <netinet/ether.h>

#include <linux/netfilter_bridge/ebt_arpreply.h>

#include "iptables/nft.h"

#include "iptables/nft-bridge.h"

#define OPT_REPLY_MAC     0x01

#define OPT_REPLY_TARGET  0x02

#define REPLY_MAC '1'

#define REPLY_TARGET '2'

static const struct option brarpreply_opts[] = {

	{ "arpreply-mac" ,    required_argument, 0, REPLY_MAC    },

	{ "arpreply-target" , required_argument, 0, REPLY_TARGET },

	XT_GETOPT_TABLEEND,

};

static void brarpreply_print_help(void)

{

	printf(

	"arpreply target options:\n"

	" --arpreply-mac address           : source MAC of generated reply\n"

	" --arpreply-target target         : ACCEPT, DROP, RETURN or CONTINUE\n"

	"                                    (standard target is DROP)\n");

}

static void brarpreply_init(struct xt_entry_target *target)

{

	struct ebt_arpreply_info *replyinfo = (void *)target->data;

	replyinfo->target = EBT_DROP;

}

static int

brarpreply_parse(int c, char **argv, int invert, unsigned int *flags,

	    const void *entry, struct xt_entry_target **tg)

{

	struct ebt_arpreply_info *replyinfo = (void *)(*tg)->data;

	struct ether_addr *addr;

	switch (c) {

	case REPLY_MAC:

		EBT_CHECK_OPTION(flags, OPT_REPLY_MAC);

		if (!(addr = ether_aton(optarg)))

			xtables_error(PARAMETER_PROBLEM, "Problem with specified --arpreply-mac mac");

		memcpy(replyinfo->mac, addr, ETH_ALEN);

		break;

	case REPLY_TARGET:

		EBT_CHECK_OPTION(flags, OPT_REPLY_TARGET);

		if (ebt_fill_target(optarg, (unsigned int *)&replyinfo->target))

			xtables_error(PARAMETER_PROBLEM, "Illegal --arpreply-target target");

		break;

	default:

		return 0;

	}

	return 1;

}

static void brarpreply_print(const void *ip, const struct xt_entry_target *t, int numeric)

{

	struct ebt_arpreply_info *replyinfo = (void *)t->data;

	printf("--arpreply-mac ");

	xtables_print_mac(replyinfo->mac);

	if (replyinfo->target == EBT_DROP)

		return;

	printf(" --arpreply-target %s", ebt_target_name(replyinfo->target));

}

static struct xtables_target arpreply_target = {

	.name		= "arpreply",

	.version	= XTABLES_VERSION,

	.family		= NFPROTO_BRIDGE,

	.init		= brarpreply_init,

	.size		= XT_ALIGN(sizeof(struct ebt_arpreply_info)),

	.userspacesize	= XT_ALIGN(sizeof(struct ebt_arpreply_info)),

	.help		= brarpreply_print_help,

	.parse		= brarpreply_parse,

	.print		= brarpreply_print,

	.extra_opts	= brarpreply_opts,

};

void _init(void)

{

	xtables_register_target(&arpreply_target);

}