d3c5ee6d54
Give all Netfilter modules consistent and unique symbol names. Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
72 lines
1.8 KiB
C
72 lines
1.8 KiB
C
/* (C) 1999-2001 Michal Ludvig <michal@logix.cz>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/if_packet.h>
|
|
#include <linux/in.h>
|
|
#include <linux/ip.h>
|
|
|
|
#include <linux/netfilter/xt_pkttype.h>
|
|
#include <linux/netfilter/x_tables.h>
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Michal Ludvig <michal@logix.cz>");
|
|
MODULE_DESCRIPTION("IP tables match to match on linklayer packet type");
|
|
MODULE_ALIAS("ipt_pkttype");
|
|
MODULE_ALIAS("ip6t_pkttype");
|
|
|
|
static bool
|
|
pkttype_mt(const struct sk_buff *skb, const struct net_device *in,
|
|
const struct net_device *out, const struct xt_match *match,
|
|
const void *matchinfo, int offset, unsigned int protoff,
|
|
bool *hotdrop)
|
|
{
|
|
u_int8_t type;
|
|
const struct xt_pkttype_info *info = matchinfo;
|
|
|
|
if (skb->pkt_type == PACKET_LOOPBACK)
|
|
type = MULTICAST(ip_hdr(skb)->daddr)
|
|
? PACKET_MULTICAST
|
|
: PACKET_BROADCAST;
|
|
else
|
|
type = skb->pkt_type;
|
|
|
|
return (type == info->pkttype) ^ info->invert;
|
|
}
|
|
|
|
static struct xt_match pkttype_mt_reg[] __read_mostly = {
|
|
{
|
|
.name = "pkttype",
|
|
.family = AF_INET,
|
|
.match = pkttype_mt,
|
|
.matchsize = sizeof(struct xt_pkttype_info),
|
|
.me = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "pkttype",
|
|
.family = AF_INET6,
|
|
.match = pkttype_mt,
|
|
.matchsize = sizeof(struct xt_pkttype_info),
|
|
.me = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init pkttype_mt_init(void)
|
|
{
|
|
return xt_register_matches(pkttype_mt_reg, ARRAY_SIZE(pkttype_mt_reg));
|
|
}
|
|
|
|
static void __exit pkttype_mt_exit(void)
|
|
{
|
|
xt_unregister_matches(pkttype_mt_reg, ARRAY_SIZE(pkttype_mt_reg));
|
|
}
|
|
|
|
module_init(pkttype_mt_init);
|
|
module_exit(pkttype_mt_exit);
|