5 * Bart De Schuymer <bdschuym@pandora.be>
10 #include <linux/module.h>
11 #include <linux/netfilter/x_tables.h>
12 #include <linux/netfilter_bridge/ebtables.h>
13 #include <linux/netfilter_bridge/ebt_pkttype.h>
15 static bool ebt_filter_pkttype(const struct sk_buff *skb,
16 const struct net_device *in,
17 const struct net_device *out,
21 const struct ebt_pkttype_info *info = data;
23 return (skb->pkt_type == info->pkt_type) ^ info->invert;
26 static bool ebt_pkttype_check(const char *tablename, unsigned int hookmask,
27 const struct ebt_entry *e, void *data, unsigned int datalen)
29 const struct ebt_pkttype_info *info = data;
31 if (info->invert != 0 && info->invert != 1)
33 /* Allow any pkt_type value */
37 static struct ebt_match filter_pkttype __read_mostly = {
38 .name = EBT_PKTTYPE_MATCH,
40 .family = NFPROTO_BRIDGE,
41 .match = ebt_filter_pkttype,
42 .check = ebt_pkttype_check,
43 .matchsize = XT_ALIGN(sizeof(struct ebt_pkttype_info)),
47 static int __init ebt_pkttype_init(void)
49 return ebt_register_match(&filter_pkttype);
52 static void __exit ebt_pkttype_fini(void)
54 ebt_unregister_match(&filter_pkttype);
57 module_init(ebt_pkttype_init);
58 module_exit(ebt_pkttype_fini);
59 MODULE_DESCRIPTION("Ebtables: Link layer packet type match");
60 MODULE_LICENSE("GPL");