Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 1 | /* (C) 1999-2001 Michal Ludvig <michal@logix.cz> |
| 2 | * |
| 3 | * This program is free software; you can redistribute it and/or modify |
| 4 | * it under the terms of the GNU General Public License version 2 as |
| 5 | * published by the Free Software Foundation. |
| 6 | */ |
| 7 | |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/skbuff.h> |
| 10 | #include <linux/if_ether.h> |
| 11 | #include <linux/if_packet.h> |
| 12 | |
| 13 | #include <linux/netfilter/xt_pkttype.h> |
| 14 | #include <linux/netfilter/x_tables.h> |
| 15 | |
| 16 | MODULE_LICENSE("GPL"); |
| 17 | MODULE_AUTHOR("Michal Ludvig <michal@logix.cz>"); |
| 18 | MODULE_DESCRIPTION("IP tables match to match on linklayer packet type"); |
| 19 | MODULE_ALIAS("ipt_pkttype"); |
| 20 | MODULE_ALIAS("ip6t_pkttype"); |
| 21 | |
| 22 | static int match(const struct sk_buff *skb, |
| 23 | const struct net_device *in, |
| 24 | const struct net_device *out, |
| 25 | const void *matchinfo, |
| 26 | int offset, |
| 27 | unsigned int protoff, |
| 28 | int *hotdrop) |
| 29 | { |
| 30 | const struct xt_pkttype_info *info = matchinfo; |
| 31 | |
| 32 | return (skb->pkt_type == info->pkttype) ^ info->invert; |
| 33 | } |
| 34 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 35 | static struct xt_match pkttype_match = { |
| 36 | .name = "pkttype", |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame^] | 37 | .match = match, |
| 38 | .matchsize = sizeof(struct xt_pkttype_info), |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 39 | .me = THIS_MODULE, |
| 40 | }; |
| 41 | |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame^] | 42 | static struct xt_match pkttype6_match = { |
| 43 | .name = "pkttype", |
| 44 | .match = match, |
| 45 | .matchsize = sizeof(struct xt_pkttype_info), |
| 46 | .me = THIS_MODULE, |
| 47 | }; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 48 | |
| 49 | static int __init init(void) |
| 50 | { |
| 51 | int ret; |
| 52 | ret = xt_register_match(AF_INET, &pkttype_match); |
| 53 | if (ret) |
| 54 | return ret; |
| 55 | |
| 56 | ret = xt_register_match(AF_INET6, &pkttype6_match); |
| 57 | if (ret) |
| 58 | xt_unregister_match(AF_INET, &pkttype_match); |
| 59 | |
| 60 | return ret; |
| 61 | } |
| 62 | |
| 63 | static void __exit fini(void) |
| 64 | { |
| 65 | xt_unregister_match(AF_INET, &pkttype_match); |
| 66 | xt_unregister_match(AF_INET6, &pkttype6_match); |
| 67 | } |
| 68 | |
| 69 | module_init(init); |
| 70 | module_exit(fini); |