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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 <libnetfilter_conntrack/linux_nfnetlink_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack_extensions.h>
#include <libnetfilter_conntrack/libnetfilter_conntrack_sctp.h>
static void parse_proto(struct nfattr *cda[], struct nfct_tuple *tuple)
{
if (cda[CTA_PROTO_SRC_PORT-1])
tuple->l4src.sctp.port =
*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_SRC_PORT-1]);
if (cda[CTA_PROTO_DST_PORT-1])
tuple->l4dst.sctp.port =
*(u_int16_t *)NFA_DATA(cda[CTA_PROTO_DST_PORT-1]);
}
static void parse_protoinfo(struct nfattr *cda[], struct nfct_conntrack *ct)
{
/* if (cda[CTA_PROTOINFO_SCTP_STATE-1])
ct->protoinfo.sctp.state =
*(u_int8_t *)NFA_DATA(cda[CTA_PROTOINFO_SCTP_STATE-1]);
*/
}
static void build_tuple_proto(struct nfnlhdr *req, int size,
struct nfct_tuple *t)
{
nfnl_addattr_l(&req->nlh, size, CTA_PROTO_SRC_PORT,
&t->l4src.sctp.port, sizeof(u_int16_t));
nfnl_addattr_l(&req->nlh, size, CTA_PROTO_DST_PORT,
&t->l4dst.sctp.port, sizeof(u_int16_t));
}
static int print_protoinfo(char *buf, union nfct_protoinfo *protoinfo)
{
/* fprintf(stdout, "%s ", states[protoinfo->sctp.state]); */
return 0;
}
static int print_proto(char *buf, struct nfct_tuple *tuple)
{
return(sprintf(buf, "sport=%u dport=%u ", htons(tuple->l4src.sctp.port),
htons(tuple->l4dst.sctp.port)));
}
static int compare(struct nfct_conntrack *ct1,
struct nfct_conntrack *ct2,
unsigned int flags)
{
if (flags & SCTP_ORIG_SPORT)
if (ct1->tuple[NFCT_DIR_ORIGINAL].l4src.sctp.port !=
ct2->tuple[NFCT_DIR_ORIGINAL].l4src.sctp.port)
return 0;
if (flags & SCTP_ORIG_DPORT)
if (ct1->tuple[NFCT_DIR_ORIGINAL].l4dst.sctp.port !=
ct2->tuple[NFCT_DIR_ORIGINAL].l4dst.sctp.port)
return 0;
if (flags & SCTP_REPL_SPORT)
if (ct1->tuple[NFCT_DIR_REPLY].l4src.sctp.port !=
ct2->tuple[NFCT_DIR_REPLY].l4src.sctp.port)
return 0;
if (flags & SCTP_REPL_DPORT)
if (ct1->tuple[NFCT_DIR_REPLY].l4dst.sctp.port !=
ct2->tuple[NFCT_DIR_REPLY].l4dst.sctp.port)
return 0;
return 1;
}
static struct nfct_proto sctp = {
.name = "sctp",
.protonum = IPPROTO_SCTP,
.parse_proto = parse_proto,
.parse_protoinfo = parse_protoinfo,
.build_tuple_proto = build_tuple_proto,
.print_proto = print_proto,
.print_protoinfo = print_protoinfo,
.compare = compare,
.version = VERSION
};
static void __attribute__ ((constructor)) init(void);
static void init(void)
{
nfct_register_proto(&sctp);
}
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