2005-04-16 22:20:36 +00:00
|
|
|
/* Kernel module to match EUI64 address parameters. */
|
|
|
|
|
|
|
|
/* (C) 2001-2002 Andras Kis-Szabo <kisza@sch.bme.hu>
|
|
|
|
*
|
|
|
|
* 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/ipv6.h>
|
|
|
|
#include <linux/if_ether.h>
|
|
|
|
|
|
|
|
#include <linux/netfilter_ipv6/ip6_tables.h>
|
|
|
|
|
|
|
|
MODULE_DESCRIPTION("IPv6 EUI64 address checking match");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_AUTHOR("Andras Kis-Szabo <kisza@sch.bme.hu>");
|
|
|
|
|
|
|
|
static int
|
|
|
|
match(const struct sk_buff *skb,
|
|
|
|
const struct net_device *in,
|
|
|
|
const struct net_device *out,
|
|
|
|
const void *matchinfo,
|
|
|
|
int offset,
|
|
|
|
unsigned int protoff,
|
|
|
|
int *hotdrop)
|
|
|
|
{
|
|
|
|
|
|
|
|
unsigned char eui64[8];
|
|
|
|
int i=0;
|
|
|
|
|
|
|
|
if ( !(skb->mac.raw >= skb->head
|
|
|
|
&& (skb->mac.raw + ETH_HLEN) <= skb->data)
|
|
|
|
&& offset != 0) {
|
|
|
|
*hotdrop = 1;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
memset(eui64, 0, sizeof(eui64));
|
|
|
|
|
|
|
|
if (eth_hdr(skb)->h_proto == ntohs(ETH_P_IPV6)) {
|
|
|
|
if (skb->nh.ipv6h->version == 0x6) {
|
|
|
|
memcpy(eui64, eth_hdr(skb)->h_source, 3);
|
|
|
|
memcpy(eui64 + 5, eth_hdr(skb)->h_source + 3, 3);
|
|
|
|
eui64[3]=0xff;
|
|
|
|
eui64[4]=0xfe;
|
|
|
|
eui64[0] |= 0x02;
|
|
|
|
|
|
|
|
i=0;
|
|
|
|
while ((skb->nh.ipv6h->saddr.s6_addr[8+i] ==
|
|
|
|
eui64[i]) && (i<8)) i++;
|
|
|
|
|
|
|
|
if ( i == 8 )
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
ip6t_eui64_checkentry(const char *tablename,
|
[NETFILTER] x_tables: Abstraction layer for {ip,ip6,arp}_tables
This monster-patch tries to do the best job for unifying the data
structures and backend interfaces for the three evil clones ip_tables,
ip6_tables and arp_tables. In an ideal world we would never have
allowed this kind of copy+paste programming... but well, our world
isn't (yet?) ideal.
o introduce a new x_tables module
o {ip,arp,ip6}_tables depend on this x_tables module
o registration functions for tables, matches and targets are only
wrappers around x_tables provided functions
o all matches/targets that are used from ip_tables and ip6_tables
are now implemented as xt_FOOBAR.c files and provide module aliases
to ipt_FOOBAR and ip6t_FOOBAR
o header files for xt_matches are in include/linux/netfilter/,
include/linux/netfilter_{ipv4,ipv6} contains compatibility wrappers
around the xt_FOOBAR.h headers
Based on this patchset we're going to further unify the code,
gradually getting rid of all the layer 3 specific assumptions.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-01-12 21:30:04 +00:00
|
|
|
const void *ip,
|
2005-04-16 22:20:36 +00:00
|
|
|
void *matchinfo,
|
|
|
|
unsigned int matchsize,
|
|
|
|
unsigned int hook_mask)
|
|
|
|
{
|
|
|
|
if (hook_mask
|
|
|
|
& ~((1 << NF_IP6_PRE_ROUTING) | (1 << NF_IP6_LOCAL_IN) |
|
|
|
|
(1 << NF_IP6_FORWARD))) {
|
|
|
|
printk("ip6t_eui64: only valid for PRE_ROUTING, LOCAL_IN or FORWARD.\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (matchsize != IP6T_ALIGN(sizeof(int)))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ip6t_match eui64_match = {
|
|
|
|
.name = "eui64",
|
|
|
|
.match = &match,
|
|
|
|
.checkentry = &ip6t_eui64_checkentry,
|
|
|
|
.me = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init init(void)
|
|
|
|
{
|
|
|
|
return ip6t_register_match(&eui64_match);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit fini(void)
|
|
|
|
{
|
|
|
|
ip6t_unregister_match(&eui64_match);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(init);
|
|
|
|
module_exit(fini);
|