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// SPDX-License-Identifier: GPL-2.0-only
/*
* ebt_pkttype
*
* Authors:
* Bart De Schuymer <bdschuym@pandora.be>
*
* April, 2003
*
*/
#include <linux/module.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_bridge/ebtables.h>
#include <linux/netfilter_bridge/ebt_pkttype.h>
static bool
ebt_pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par)
{
const struct ebt_pkttype_info *info = par->matchinfo;
return (skb->pkt_type == info->pkt_type) ^ info->invert;
}
static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par)
{
const struct ebt_pkttype_info *info = par->matchinfo;
if (info->invert != 0 && info->invert != 1)
return -EINVAL;
/* Allow any pkt_type value */
return 0;
}
static struct xt_match ebt_pkttype_mt_reg __read_mostly = {
.name = "pkttype",
.revision = 0,
.family = NFPROTO_BRIDGE,
.match = ebt_pkttype_mt,
.checkentry = ebt_pkttype_mt_check,
.matchsize = sizeof(struct ebt_pkttype_info),
.me = THIS_MODULE,
};
static int __init ebt_pkttype_init(void)
{
return xt_register_match(&ebt_pkttype_mt_reg);
}
static void __exit ebt_pkttype_fini(void)
{
xt_unregister_match(&ebt_pkttype_mt_reg);
}
module_init(ebt_pkttype_init);
module_exit(ebt_pkttype_fini);
MODULE_DESCRIPTION("Ebtables: Link layer packet type match");
MODULE_LICENSE("GPL");
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