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/* 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);
}
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