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/* 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);
}
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