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, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 25 | const struct xt_match *match, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 26 | const void *matchinfo, |
| 27 | int offset, |
| 28 | unsigned int protoff, |
| 29 | int *hotdrop) |
| 30 | { |
| 31 | const struct xt_pkttype_info *info = matchinfo; |
| 32 | |
| 33 | return (skb->pkt_type == info->pkttype) ^ info->invert; |
| 34 | } |
| 35 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 36 | static struct xt_match pkttype_match = { |
| 37 | .name = "pkttype", |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 38 | .match = match, |
| 39 | .matchsize = sizeof(struct xt_pkttype_info), |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 40 | .family = AF_INET, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 41 | .me = THIS_MODULE, |
| 42 | }; |
| 43 | |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 44 | static struct xt_match pkttype6_match = { |
| 45 | .name = "pkttype", |
| 46 | .match = match, |
| 47 | .matchsize = sizeof(struct xt_pkttype_info), |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 48 | .family = AF_INET6, |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 49 | .me = THIS_MODULE, |
| 50 | }; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 51 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame^] | 52 | static int __init xt_pkttype_init(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 53 | { |
| 54 | int ret; |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 55 | ret = xt_register_match(&pkttype_match); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 56 | if (ret) |
| 57 | return ret; |
| 58 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 59 | ret = xt_register_match(&pkttype6_match); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 60 | if (ret) |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 61 | xt_unregister_match(&pkttype_match); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 62 | |
| 63 | return ret; |
| 64 | } |
| 65 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame^] | 66 | static void __exit xt_pkttype_fini(void) |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 67 | { |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 68 | xt_unregister_match(&pkttype_match); |
| 69 | xt_unregister_match(&pkttype6_match); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 70 | } |
| 71 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame^] | 72 | module_init(xt_pkttype_init); |
| 73 | module_exit(xt_pkttype_fini); |