mirror of
https://github.com/torvalds/linux
synced 2024-07-21 10:41:44 +00:00
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>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/* (C) 1999-2001 Michal Ludvig <michal@logix.cz>
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/if_packet.h>
|
|
#include <linux/in.h>
|
|
#include <linux/ip.h>
|
|
#include <linux/ipv6.h>
|
|
|
|
#include <linux/netfilter/xt_pkttype.h>
|
|
#include <linux/netfilter/x_tables.h>
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Michal Ludvig <michal@logix.cz>");
|
|
MODULE_DESCRIPTION("Xtables: link layer packet type match");
|
|
MODULE_ALIAS("ipt_pkttype");
|
|
MODULE_ALIAS("ip6t_pkttype");
|
|
|
|
static bool
|
|
pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
|
|
{
|
|
const struct xt_pkttype_info *info = par->matchinfo;
|
|
u_int8_t type;
|
|
|
|
if (skb->pkt_type != PACKET_LOOPBACK)
|
|
type = skb->pkt_type;
|
|
else if (xt_family(par) == NFPROTO_IPV4 &&
|
|
ipv4_is_multicast(ip_hdr(skb)->daddr))
|
|
type = PACKET_MULTICAST;
|
|
else if (xt_family(par) == NFPROTO_IPV6)
|
|
type = PACKET_MULTICAST;
|
|
else
|
|
type = PACKET_BROADCAST;
|
|
|
|
return (type == info->pkttype) ^ info->invert;
|
|
}
|
|
|
|
static struct xt_match pkttype_mt_reg __read_mostly = {
|
|
.name = "pkttype",
|
|
.revision = 0,
|
|
.family = NFPROTO_UNSPEC,
|
|
.match = pkttype_mt,
|
|
.matchsize = sizeof(struct xt_pkttype_info),
|
|
.me = THIS_MODULE,
|
|
};
|
|
|
|
static int __init pkttype_mt_init(void)
|
|
{
|
|
return xt_register_match(&pkttype_mt_reg);
|
|
}
|
|
|
|
static void __exit pkttype_mt_exit(void)
|
|
{
|
|
xt_unregister_match(&pkttype_mt_reg);
|
|
}
|
|
|
|
module_init(pkttype_mt_init);
|
|
module_exit(pkttype_mt_exit);
|