Release 4.14 net/netfilter/xt_mac.c

/* Kernel module to match MAC address parameters. */

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * 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/if_arp.h>
#include <linux/if_ether.h>
#include <linux/etherdevice.h>

#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter/xt_mac.h>
#include <linux/netfilter/x_tables.h>

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
MODULE_DESCRIPTION("Xtables: MAC address match");
MODULE_ALIAS("ipt_mac");
MODULE_ALIAS("ip6t_mac");



static bool mac_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
	const struct xt_mac_info *info = par->matchinfo;
	bool ret;

	if (skb->dev == NULL || skb->dev->type != ARPHRD_ETHER)
		return false;
	if (skb_mac_header(skb) < skb->head)
		return false;
	if (skb_mac_header(skb) + ETH_HLEN > skb->data)
		return false;
	ret  = ether_addr_equal(eth_hdr(skb)->h_source, info->srcaddr);
	ret ^= info->invert;
	return ret;
}

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Jan Engelhardt
50
48.08%
6
50.00%
Linus Torvalds (pre-git)
41
39.42%
1
8.33%
Arnaldo Carvalho de Melo
9
8.65%
2
16.67%
Linus Torvalds
2
1.92%
1
8.33%
Harald Welte
1
0.96%
1
8.33%
Joe Perches
1
0.96%
1
8.33%
Total
104
100.00%
12
100.00%


static struct xt_match mac_mt_reg __read_mostly = {
	.name      = "mac",
	.revision  = 0,
	.family    = NFPROTO_UNSPEC,
	.match     = mac_mt,
	.matchsize = sizeof(struct xt_mac_info),
	.hooks     = (1 << NF_INET_PRE_ROUTING) | (1 << NF_INET_LOCAL_IN) |
	             (1 << NF_INET_FORWARD),
	.me        = THIS_MODULE,
};



static int __init mac_mt_init(void)
{
	return xt_register_match(&mac_mt_reg);
}

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Linus Torvalds (pre-git)
11
68.75%
1
25.00%
Jan Engelhardt
4
25.00%
2
50.00%
Patrick McHardy
1
6.25%
1
25.00%
Total
16
100.00%
4
100.00%



static void __exit mac_mt_exit(void)
{
	xt_unregister_match(&mac_mt_reg);
}

Contributors
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Tokens
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Commits
CommitProp
Linus Torvalds (pre-git)
9
60.00%
1
25.00%
Jan Engelhardt
4
26.67%
2
50.00%
Harald Welte
2
13.33%
1
25.00%
Total
15
100.00%
4
100.00%


module_init(mac_mt_init);

module_exit(mac_mt_exit);
Overall Contributors
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Tokens
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Commits
CommitProp
Linus Torvalds (pre-git)
89
33.97%
1
4.35%
Jan Engelhardt
69
26.34%
8
34.78%
Harald Welte
49
18.70%
3
13.04%
Patrick McHardy
36
13.74%
5
21.74%
Arnaldo Carvalho de Melo
9
3.44%
2
8.70%
Art Haas
4
1.53%
1
4.35%
Kris Katterjohn
3
1.15%
1
4.35%
Linus Torvalds
2
0.76%
1
4.35%
Joe Perches
1
0.38%
1
4.35%
Total
262
100.00%
23
100.00%
Directory: net/netfilter

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