mirror of
https://github.com/brain-hackers/linux-brain.git
synced 2024-06-09 23:36:23 +09:00
d2912cb15b
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>
64 lines
1.6 KiB
C
64 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* Kernel module to match MAC address parameters. */
|
|
|
|
/* (C) 1999-2001 Paul `Rusty' Russell
|
|
* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
|
|
*/
|
|
|
|
#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;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static void __exit mac_mt_exit(void)
|
|
{
|
|
xt_unregister_match(&mac_mt_reg);
|
|
}
|
|
|
|
module_init(mac_mt_init);
|
|
module_exit(mac_mt_exit);
|