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- /*
- * 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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