2005-04-16 22:20:36 +00:00
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/* Kernel module to match MAC address parameters. */
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/* (C) 1999-2001 Paul `Rusty' Russell
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* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/if_ether.h>
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2006-01-10 00:01:43 +00:00
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#include <linux/etherdevice.h>
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2005-04-16 22:20:36 +00:00
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[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
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter/xt_mac.h>
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#include <linux/netfilter/x_tables.h>
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2005-04-16 22:20:36 +00:00
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
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MODULE_DESCRIPTION("iptables mac matching module");
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[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
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MODULE_ALIAS("ipt_mac");
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MODULE_ALIAS("ip6t_mac");
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2005-04-16 22:20:36 +00:00
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static int
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match(const struct sk_buff *skb,
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const struct net_device *in,
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const struct net_device *out,
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2006-03-21 02:02:56 +00:00
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const struct xt_match *match,
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2005-04-16 22:20:36 +00:00
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const void *matchinfo,
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int offset,
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[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
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unsigned int protoff,
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2005-04-16 22:20:36 +00:00
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int *hotdrop)
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{
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[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
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const struct xt_mac_info *info = matchinfo;
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2005-04-16 22:20:36 +00:00
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/* Is mac pointer valid? */
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return (skb->mac.raw >= skb->head
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&& (skb->mac.raw + ETH_HLEN) <= skb->data
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/* If so, compare... */
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2006-01-10 00:01:43 +00:00
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&& ((!compare_ether_addr(eth_hdr(skb)->h_source, info->srcaddr))
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^ info->invert));
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2005-04-16 22:20:36 +00:00
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}
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2006-08-22 07:34:04 +00:00
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static struct xt_match xt_mac_match[] = {
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{
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.name = "mac",
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.family = AF_INET,
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.match = match,
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.matchsize = sizeof(struct xt_mac_info),
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.hooks = (1 << NF_IP_PRE_ROUTING) |
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(1 << NF_IP_LOCAL_IN) |
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(1 << NF_IP_FORWARD),
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.me = THIS_MODULE,
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},
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{
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.name = "mac",
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.family = AF_INET6,
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.match = match,
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.matchsize = sizeof(struct xt_mac_info),
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.hooks = (1 << NF_IP_PRE_ROUTING) |
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(1 << NF_IP_LOCAL_IN) |
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(1 << NF_IP_FORWARD),
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.me = THIS_MODULE,
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},
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2005-04-16 22:20:36 +00:00
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};
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2006-03-29 00:37:06 +00:00
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static int __init xt_mac_init(void)
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2005-04-16 22:20:36 +00:00
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{
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2006-08-22 07:34:04 +00:00
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return xt_register_matches(xt_mac_match, ARRAY_SIZE(xt_mac_match));
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2005-04-16 22:20:36 +00:00
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}
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2006-03-29 00:37:06 +00:00
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static void __exit xt_mac_fini(void)
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2005-04-16 22:20:36 +00:00
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{
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2006-08-22 07:34:04 +00:00
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xt_unregister_matches(xt_mac_match, ARRAY_SIZE(xt_mac_match));
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2005-04-16 22:20:36 +00:00
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}
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2006-03-29 00:37:06 +00:00
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module_init(xt_mac_init);
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module_exit(xt_mac_fini);
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