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/*
* (C) 2005 by Pablo Neira Ayuso <pablo@netfilter.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#include <stdio.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <netinet/in.h> /* For htons */
#include <linux/netfilter/nfnetlink_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
void parse_proto(struct nfattr *cda[], struct nfct_tuple *tuple)
{
if (cda[CTA_PROTO_SRC_PORT-1])
tuple->l4src.udp.port =
*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_SRC_PORT-1]);
if (cda[CTA_PROTO_DST_PORT-1])
tuple->l4dst.udp.port =
*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_DST_PORT-1]);
}
int print_proto(char *buf, struct nfct_tuple *tuple)
{
return (sprintf(buf, "sport=%u dport=%u ", htons(tuple->l4src.udp.port),
htons(tuple->l4dst.udp.port)));
}
static struct nfct_proto udp = {
.name = "udp",
.protonum = IPPROTO_UDP,
.parse_proto = parse_proto,
.print_proto = print_proto,
.version = LIBNETFILTER_CONNTRACK_VERSION,
};
void __attribute__ ((constructor)) init(void);
void init(void)
{
nfct_register_proto(&udp);
}
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