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Commit | Line | Data |
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1da177e4 | 1 | /* IP tables module for matching the routing realm |
1da177e4 LT |
2 | * |
3 | * (C) 2003 by Sampsa Ranta <sampsa@netsonic.fi> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/skbuff.h> | |
12 | #include <linux/netdevice.h> | |
13 | #include <net/route.h> | |
14 | ||
2e4e6a17 HW |
15 | #include <linux/netfilter_ipv4.h> |
16 | #include <linux/netfilter/xt_realm.h> | |
17 | #include <linux/netfilter/x_tables.h> | |
1da177e4 LT |
18 | |
19 | MODULE_AUTHOR("Sampsa Ranta <sampsa@netsonic.fi>"); | |
20 | MODULE_LICENSE("GPL"); | |
2ae15b64 | 21 | MODULE_DESCRIPTION("Xtables: Routing realm match"); |
2e4e6a17 | 22 | MODULE_ALIAS("ipt_realm"); |
1da177e4 | 23 | |
1d93a9cb | 24 | static bool |
62fc8051 | 25 | realm_mt(const struct sk_buff *skb, struct xt_action_param *par) |
1da177e4 | 26 | { |
f7108a20 | 27 | const struct xt_realm_info *info = par->matchinfo; |
adf30907 | 28 | const struct dst_entry *dst = skb_dst(skb); |
601e68e1 | 29 | |
1da177e4 LT |
30 | return (info->id == (dst->tclassid & info->mask)) ^ info->invert; |
31 | } | |
32 | ||
d3c5ee6d | 33 | static struct xt_match realm_mt_reg __read_mostly = { |
1da177e4 | 34 | .name = "realm", |
d3c5ee6d | 35 | .match = realm_mt, |
5d04bff0 | 36 | .matchsize = sizeof(struct xt_realm_info), |
6e23ae2a PM |
37 | .hooks = (1 << NF_INET_POST_ROUTING) | (1 << NF_INET_FORWARD) | |
38 | (1 << NF_INET_LOCAL_OUT) | (1 << NF_INET_LOCAL_IN), | |
ab4f21e6 | 39 | .family = NFPROTO_UNSPEC, |
1da177e4 LT |
40 | .me = THIS_MODULE |
41 | }; | |
42 | ||
d3c5ee6d | 43 | static int __init realm_mt_init(void) |
1da177e4 | 44 | { |
d3c5ee6d | 45 | return xt_register_match(&realm_mt_reg); |
1da177e4 LT |
46 | } |
47 | ||
d3c5ee6d | 48 | static void __exit realm_mt_exit(void) |
1da177e4 | 49 | { |
d3c5ee6d | 50 | xt_unregister_match(&realm_mt_reg); |
1da177e4 LT |
51 | } |
52 | ||
d3c5ee6d JE |
53 | module_init(realm_mt_init); |
54 | module_exit(realm_mt_exit); |