/* ebt_redirect

 *

 * Authors:

 * Bart De Schuymer <bdschuym@pandora.be>

 *

 * April, 2002

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <getopt.h>

#include <xtables.h>

#include <linux/netfilter_bridge/ebt_redirect.h>

#include "iptables/nft.h"

#include "iptables/nft-bridge.h"

#define REDIRECT_TARGET '1'

static const struct option brredir_opts[] =

{

	{ "redirect-target", required_argument, 0, REDIRECT_TARGET },

	{ 0 }

};

static void brredir_print_help(void)

{

	printf(

	"redirect option:\n"

	" --redirect-target target   : ACCEPT, DROP, RETURN or CONTINUE\n");

}

static void brredir_init(struct xt_entry_target *target)

{

	struct ebt_redirect_info *redirectinfo =

	   (struct ebt_redirect_info *)target->data;

	redirectinfo->target = EBT_ACCEPT;

}

#define OPT_REDIRECT_TARGET  0x01

static int brredir_parse(int c, char **argv, int invert, unsigned int *flags,

			 const void *entry, struct xt_entry_target **target)

{

	struct ebt_redirect_info *redirectinfo =

	   (struct ebt_redirect_info *)(*target)->data;

	switch (c) {

	case REDIRECT_TARGET:

		EBT_CHECK_OPTION(flags, OPT_REDIRECT_TARGET);

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

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

		break;

	default:

		return 0;

	}

	return 1;

}

static void brredir_print(const void *ip, const struct xt_entry_target *target, int numeric)

{

	struct ebt_redirect_info *redirectinfo =

	   (struct ebt_redirect_info *)target->data;

	if (redirectinfo->target == EBT_ACCEPT)

		return;

	printf("--redirect-target %s", ebt_target_name(redirectinfo->target));

}

static const char* brredir_verdict(int verdict)

{

	switch (verdict) {

	case EBT_ACCEPT: return "accept";

	case EBT_DROP: return "drop";

	case EBT_CONTINUE: return "continue";

	case EBT_RETURN: return "return";

	}

	return "";

}

static int brredir_xlate(struct xt_xlate *xl,

			 const struct xt_xlate_tg_params *params)

{

	const struct ebt_redirect_info *red = (const void*)params->target->data;

	xt_xlate_add(xl, "meta set pkttype host");

	if (red->target != EBT_ACCEPT)

		xt_xlate_add(xl, " %s ", brredir_verdict(red->target));

	return 0;

}

static struct xtables_target brredirect_target = {

	.name		= "redirect",

	.version	= XTABLES_VERSION,

	.family		= NFPROTO_BRIDGE,

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

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

	.help		= brredir_print_help,

	.init		= brredir_init,

	.parse		= brredir_parse,

	.print		= brredir_print,

	.xlate		= brredir_xlate,

	.extra_opts	= brredir_opts,

};

void _init(void)

{

	xtables_register_target(&brredirect_target);

}