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![Thomas Gleixner](/assets/img/avatar_default.png)
Based on 2 normalized pattern(s): 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* 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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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/if_arp.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 mac_mt(const struct sk_buff *skb, struct xt_action_param *par)
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{
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const struct xt_mac_info *info = par->matchinfo;
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bool ret;
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if (skb->dev == NULL || skb->dev->type != ARPHRD_ETHER)
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return false;
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if (skb_mac_header(skb) < skb->head)
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return false;
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if (skb_mac_header(skb) + ETH_HLEN > skb->data)
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return false;
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ret = ether_addr_equal(eth_hdr(skb)->h_source, info->srcaddr);
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ret ^= info->invert;
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return ret;
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}
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static struct xt_match mac_mt_reg __read_mostly = {
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.name = "mac",
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.revision = 0,
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.family = NFPROTO_UNSPEC,
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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) | (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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static int __init mac_mt_init(void)
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{
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return xt_register_match(&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_match(&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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