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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - net/netfilter/xt_mac.c
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.
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("iptables mac matching module");
24 MODULE_ALIAS("ipt_mac");
25 MODULE_ALIAS("ip6t_mac");
28 match(const struct sk_buff
*skb
,
29 const struct net_device
*in
,
30 const struct net_device
*out
,
31 const struct xt_match
*match
,
32 const void *matchinfo
,
37 const struct xt_mac_info
*info
= matchinfo
;
39 /* Is mac pointer valid? */
40 return (skb_mac_header(skb
) >= skb
->head
&&
41 (skb_mac_header(skb
) + ETH_HLEN
) <= skb
->data
42 /* If so, compare... */
43 && ((!compare_ether_addr(eth_hdr(skb
)->h_source
, info
->srcaddr
))
47 static struct xt_match xt_mac_match
[] = {
52 .matchsize
= sizeof(struct xt_mac_info
),
53 .hooks
= (1 << NF_IP_PRE_ROUTING
) |
54 (1 << NF_IP_LOCAL_IN
) |
62 .matchsize
= sizeof(struct xt_mac_info
),
63 .hooks
= (1 << NF_IP6_PRE_ROUTING
) |
64 (1 << NF_IP6_LOCAL_IN
) |
65 (1 << NF_IP6_FORWARD
),
70 static int __init
xt_mac_init(void)
72 return xt_register_matches(xt_mac_match
, ARRAY_SIZE(xt_mac_match
));
75 static void __exit
xt_mac_fini(void)
77 xt_unregister_matches(xt_mac_match
, ARRAY_SIZE(xt_mac_match
));
80 module_init(xt_mac_init
);
81 module_exit(xt_mac_fini
);