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/* ebt_redirect
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*
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* Authors:
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* Bart De Schuymer <bdschuym@pandora.be>
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*
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* April, 2002
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <getopt.h>
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#include <xtables.h>
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#include <linux/netfilter_bridge/ebt_redirect.h>
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#include "iptables/nft.h"
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#include "iptables/nft-bridge.h"
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#define REDIRECT_TARGET '1'
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static const struct option brredir_opts[] =
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{
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{ "redirect-target", required_argument, 0, REDIRECT_TARGET },
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{ 0 }
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};
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static void brredir_print_help(void)
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{
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printf(
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"redirect option:\n"
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" --redirect-target target : ACCEPT, DROP, RETURN or CONTINUE\n");
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}
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static void brredir_init(struct xt_entry_target *target)
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{
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struct ebt_redirect_info *redirectinfo =
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(struct ebt_redirect_info *)target->data;
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redirectinfo->target = EBT_ACCEPT;
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}
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#define OPT_REDIRECT_TARGET 0x01
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static int brredir_parse(int c, char **argv, int invert, unsigned int *flags,
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const void *entry, struct xt_entry_target **target)
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{
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struct ebt_redirect_info *redirectinfo =
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(struct ebt_redirect_info *)(*target)->data;
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switch (c) {
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case REDIRECT_TARGET:
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EBT_CHECK_OPTION(flags, OPT_REDIRECT_TARGET);
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if (ebt_fill_target(optarg, (unsigned int *)&redirectinfo->target))
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xtables_error(PARAMETER_PROBLEM, "Illegal --redirect-target target");
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break;
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default:
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return 0;
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}
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return 1;
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}
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static void brredir_print(const void *ip, const struct xt_entry_target *target, int numeric)
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{
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struct ebt_redirect_info *redirectinfo =
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(struct ebt_redirect_info *)target->data;
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if (redirectinfo->target == EBT_ACCEPT)
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return;
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printf("--redirect-target %s", ebt_target_name(redirectinfo->target));
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}
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static const char* brredir_verdict(int verdict)
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{
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switch (verdict) {
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case EBT_ACCEPT: return "accept";
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case EBT_DROP: return "drop";
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case EBT_CONTINUE: return "continue";
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case EBT_RETURN: return "return";
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}
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return "";
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}
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static int brredir_xlate(struct xt_xlate *xl,
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const struct xt_xlate_tg_params *params)
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{
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const struct ebt_redirect_info *red = (const void*)params->target->data;
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xt_xlate_add(xl, "meta set pkttype host");
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if (red->target != EBT_ACCEPT)
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xt_xlate_add(xl, " %s ", brredir_verdict(red->target));
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return 0;
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}
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static struct xtables_target brredirect_target = {
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.name = "redirect",
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.version = XTABLES_VERSION,
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.family = NFPROTO_BRIDGE,
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.size = XT_ALIGN(sizeof(struct ebt_redirect_info)),
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.userspacesize = XT_ALIGN(sizeof(struct ebt_redirect_info)),
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.help = brredir_print_help,
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.init = brredir_init,
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.parse = brredir_parse,
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.print = brredir_print,
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.xlate = brredir_xlate,
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.extra_opts = brredir_opts,
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};
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void _init(void)
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{
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xtables_register_target(&brredirect_target);
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}
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