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![Jan Engelhardt](/assets/img/avatar_default.png)
Updates the MODULE_DESCRIPTION() tags for all Netfilter modules, actually describing what the module does and not just "netfilter XYZ target". Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
2 KiB
C
76 lines
2 KiB
C
/* 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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#include <linux/etherdevice.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/netfilter_ipv6.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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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Netfilter Core Team <coreteam@netfilter.org>");
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MODULE_DESCRIPTION("Xtables: MAC address match");
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MODULE_ALIAS("ipt_mac");
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MODULE_ALIAS("ip6t_mac");
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static bool
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mac_mt(const struct sk_buff *skb, const struct net_device *in,
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const struct net_device *out, const struct xt_match *match,
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const void *matchinfo, int offset, unsigned int protoff, bool *hotdrop)
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{
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const struct xt_mac_info *info = matchinfo;
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/* Is mac pointer valid? */
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return skb_mac_header(skb) >= skb->head &&
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skb_mac_header(skb) + ETH_HLEN <= skb->data
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/* If so, compare... */
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&& ((!compare_ether_addr(eth_hdr(skb)->h_source, info->srcaddr))
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^ info->invert);
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}
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static struct xt_match mac_mt_reg[] __read_mostly = {
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{
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.name = "mac",
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.family = AF_INET,
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.match = mac_mt,
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.matchsize = sizeof(struct xt_mac_info),
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.hooks = (1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_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 = mac_mt,
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.matchsize = sizeof(struct xt_mac_info),
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.hooks = (1 << NF_INET_PRE_ROUTING) |
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(1 << NF_INET_LOCAL_IN) |
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(1 << NF_INET_FORWARD),
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.me = THIS_MODULE,
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},
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};
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static int __init mac_mt_init(void)
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{
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return xt_register_matches(mac_mt_reg, ARRAY_SIZE(mac_mt_reg));
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}
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static void __exit mac_mt_exit(void)
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{
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xt_unregister_matches(mac_mt_reg, ARRAY_SIZE(mac_mt_reg));
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}
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module_init(mac_mt_init);
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module_exit(mac_mt_exit);
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