Linux 2.6.31.6
[linux/fpc-iii.git] / net / netfilter / xt_mac.c
blobc2007116ce5bb66db44ae43590e8ba94330d03ea
1 /* Kernel module to match MAC address parameters. */
3 /* (C) 1999-2001 Paul `Rusty' Russell
4 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
11 #include <linux/module.h>
12 #include <linux/skbuff.h>
13 #include <linux/if_ether.h>
14 #include <linux/etherdevice.h>
16 #include <linux/netfilter_ipv4.h>
17 #include <linux/netfilter_ipv6.h>
18 #include <linux/netfilter/xt_mac.h>
19 #include <linux/netfilter/x_tables.h>
21 MODULE_LICENSE("GPL");
22 MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
23 MODULE_DESCRIPTION("Xtables: MAC address match");
24 MODULE_ALIAS("ipt_mac");
25 MODULE_ALIAS("ip6t_mac");
27 static bool mac_mt(const struct sk_buff *skb, const struct xt_match_param *par)
29 const struct xt_mac_info *info = par->matchinfo;
31 /* Is mac pointer valid? */
32 return skb_mac_header(skb) >= skb->head &&
33 skb_mac_header(skb) + ETH_HLEN <= skb->data
34 /* If so, compare... */
35 && ((!compare_ether_addr(eth_hdr(skb)->h_source, info->srcaddr))
36 ^ info->invert);
39 static struct xt_match mac_mt_reg __read_mostly = {
40 .name = "mac",
41 .revision = 0,
42 .family = NFPROTO_UNSPEC,
43 .match = mac_mt,
44 .matchsize = sizeof(struct xt_mac_info),
45 .hooks = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) |
46 (1 << NF_INET_FORWARD),
47 .me = THIS_MODULE,
50 static int __init mac_mt_init(void)
52 return xt_register_match(&mac_mt_reg);
55 static void __exit mac_mt_exit(void)
57 xt_unregister_match(&mac_mt_reg);
60 module_init(mac_mt_init);
61 module_exit(mac_mt_exit);