Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ebt_pkttype | |
3 | * | |
4 | * Authors: | |
5 | * Bart De Schuymer <bdschuym@pandora.be> | |
6 | * | |
7 | * April, 2003 | |
8 | * | |
9 | */ | |
18219d3f JE |
10 | #include <linux/module.h> |
11 | #include <linux/netfilter/x_tables.h> | |
1da177e4 LT |
12 | #include <linux/netfilter_bridge/ebtables.h> |
13 | #include <linux/netfilter_bridge/ebt_pkttype.h> | |
1da177e4 | 14 | |
2d06d4a5 | 15 | static bool |
62fc8051 | 16 | ebt_pkttype_mt(const struct sk_buff *skb, struct xt_action_param *par) |
1da177e4 | 17 | { |
f7108a20 | 18 | const struct ebt_pkttype_info *info = par->matchinfo; |
1da177e4 | 19 | |
8cc784ee | 20 | return (skb->pkt_type == info->pkt_type) ^ info->invert; |
1da177e4 LT |
21 | } |
22 | ||
b0f38452 | 23 | static int ebt_pkttype_mt_check(const struct xt_mtchk_param *par) |
1da177e4 | 24 | { |
9b4fce7a | 25 | const struct ebt_pkttype_info *info = par->matchinfo; |
1da177e4 | 26 | |
1da177e4 | 27 | if (info->invert != 0 && info->invert != 1) |
bd414ee6 | 28 | return -EINVAL; |
1da177e4 | 29 | /* Allow any pkt_type value */ |
bd414ee6 | 30 | return 0; |
1da177e4 LT |
31 | } |
32 | ||
043ef46c JE |
33 | static struct xt_match ebt_pkttype_mt_reg __read_mostly = { |
34 | .name = "pkttype", | |
001a18d3 JE |
35 | .revision = 0, |
36 | .family = NFPROTO_BRIDGE, | |
2d06d4a5 JE |
37 | .match = ebt_pkttype_mt, |
38 | .checkentry = ebt_pkttype_mt_check, | |
fc0e3df4 | 39 | .matchsize = sizeof(struct ebt_pkttype_info), |
1da177e4 LT |
40 | .me = THIS_MODULE, |
41 | }; | |
42 | ||
65b4b4e8 | 43 | static int __init ebt_pkttype_init(void) |
1da177e4 | 44 | { |
043ef46c | 45 | return xt_register_match(&ebt_pkttype_mt_reg); |
1da177e4 LT |
46 | } |
47 | ||
65b4b4e8 | 48 | static void __exit ebt_pkttype_fini(void) |
1da177e4 | 49 | { |
043ef46c | 50 | xt_unregister_match(&ebt_pkttype_mt_reg); |
1da177e4 LT |
51 | } |
52 | ||
65b4b4e8 AM |
53 | module_init(ebt_pkttype_init); |
54 | module_exit(ebt_pkttype_fini); | |
f776c4cd | 55 | MODULE_DESCRIPTION("Ebtables: Link layer packet type match"); |
1da177e4 | 56 | MODULE_LICENSE("GPL"); |