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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 mac_mt(const struct sk_buff
*skb
, const struct net_device
*in
,
29 const struct net_device
*out
, const struct xt_match
*match
,
30 const void *matchinfo
, int offset
, unsigned int protoff
, bool *hotdrop
)
32 const struct xt_mac_info
*info
= matchinfo
;
34 /* Is mac pointer valid? */
35 return skb_mac_header(skb
) >= skb
->head
&&
36 skb_mac_header(skb
) + ETH_HLEN
<= skb
->data
37 /* If so, compare... */
38 && ((!compare_ether_addr(eth_hdr(skb
)->h_source
, info
->srcaddr
))
42 static struct xt_match mac_mt_reg
[] __read_mostly
= {
47 .matchsize
= sizeof(struct xt_mac_info
),
48 .hooks
= (1 << NF_INET_PRE_ROUTING
) |
49 (1 << NF_INET_LOCAL_IN
) |
50 (1 << NF_INET_FORWARD
),
57 .matchsize
= sizeof(struct xt_mac_info
),
58 .hooks
= (1 << NF_INET_PRE_ROUTING
) |
59 (1 << NF_INET_LOCAL_IN
) |
60 (1 << NF_INET_FORWARD
),
65 static int __init
mac_mt_init(void)
67 return xt_register_matches(mac_mt_reg
, ARRAY_SIZE(mac_mt_reg
));
70 static void __exit
mac_mt_exit(void)
72 xt_unregister_matches(mac_mt_reg
, ARRAY_SIZE(mac_mt_reg
));
75 module_init(mac_mt_init
);
76 module_exit(mac_mt_exit
);