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/* Shared library add-on to iptables for NFQ
*
* (C) 2005 by Harald Welte <laforge@netfilter.org>
*
* This program is distributed under the terms of GNU GPL v2, 1991
*
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <getopt.h>
#include <iptables.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_NFQUEUE.h>
static void init(struct xt_entry_target *t, unsigned int *nfcache)
{
}
static void help(void)
{
printf(
"NFQUEUE target options\n"
" --queue-num value Send packet to QUEUE number <value>.\n"
" Valid queue numbers are 0-65535\n"
);
}
static struct option opts[] = {
{ "queue-num", 1, 0, 'F' },
{ 0 }
};
static void
parse_num(const char *s, struct ipt_NFQ_info *tinfo)
{
unsigned int num;
if (string_to_number(s, 0, 65535, &num) == -1)
exit_error(PARAMETER_PROBLEM,
"Invalid queue number `%s'\n", s);
tinfo->queuenum = num & 0xffff;
return;
}
static int
parse(int c, char **argv, int invert, unsigned int *flags,
const void *entry,
struct xt_entry_target **target)
{
struct ipt_NFQ_info *tinfo
= (struct ipt_NFQ_info *)(*target)->data;
switch (c) {
case 'F':
if (*flags)
exit_error(PARAMETER_PROBLEM, "NFQUEUE target: "
"Only use --queue-num ONCE!");
parse_num(optarg, tinfo);
break;
default:
return 0;
}
return 1;
}
static void
final_check(unsigned int flags)
{
}
/* Prints out the targinfo. */
static void
print(const void *ip,
const struct xt_entry_target *target,
int numeric)
{
const struct ipt_NFQ_info *tinfo =
(const struct ipt_NFQ_info *)target->data;
printf("NFQUEUE num %u", tinfo->queuenum);
}
/* Saves the union ipt_targinfo in parsable form to stdout. */
static void
save(const void *ip, const struct xt_entry_target *target)
{
const struct ipt_NFQ_info *tinfo =
(const struct ipt_NFQ_info *)target->data;
printf("--queue-num %u ", tinfo->queuenum);
}
static struct iptables_target nfqueue = {
.next = NULL,
.name = "NFQUEUE",
.version = IPTABLES_VERSION,
.size = IPT_ALIGN(sizeof(struct ipt_NFQ_info)),
.userspacesize = IPT_ALIGN(sizeof(struct ipt_NFQ_info)),
.help = &help,
.init = &init,
.parse = &parse,
.final_check = &final_check,
.print = &print,
.save = &save,
.extra_opts = opts
};
void _init(void)
{
register_target(&nfqueue);
}
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