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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * ebt_mark_m | |
3 | * | |
4 | * Authors: | |
5 | * Bart De Schuymer <bdschuym@pandora.be> | |
6 | * | |
7 | * July, 2002 | |
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_mark_m.h> | |
1da177e4 | 14 | |
2d06d4a5 | 15 | static bool |
f7108a20 | 16 | ebt_mark_mt(const struct sk_buff *skb, const struct xt_match_param *par) |
1da177e4 | 17 | { |
f7108a20 | 18 | const struct ebt_mark_m_info *info = par->matchinfo; |
1da177e4 LT |
19 | |
20 | if (info->bitmask & EBT_MARK_OR) | |
8cc784ee JE |
21 | return !!(skb->mark & info->mask) ^ info->invert; |
22 | return ((skb->mark & info->mask) == info->mark) ^ info->invert; | |
1da177e4 LT |
23 | } |
24 | ||
9b4fce7a | 25 | static bool ebt_mark_mt_check(const struct xt_mtchk_param *par) |
1da177e4 | 26 | { |
9b4fce7a | 27 | const struct ebt_mark_m_info *info = par->matchinfo; |
1da177e4 | 28 | |
1da177e4 | 29 | if (info->bitmask & ~EBT_MARK_MASK) |
19eda879 | 30 | return false; |
1da177e4 | 31 | if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND)) |
19eda879 | 32 | return false; |
1da177e4 | 33 | if (!info->bitmask) |
19eda879 JE |
34 | return false; |
35 | return true; | |
1da177e4 LT |
36 | } |
37 | ||
043ef46c JE |
38 | static struct xt_match ebt_mark_mt_reg __read_mostly = { |
39 | .name = "mark_m", | |
001a18d3 JE |
40 | .revision = 0, |
41 | .family = NFPROTO_BRIDGE, | |
2d06d4a5 JE |
42 | .match = ebt_mark_mt, |
43 | .checkentry = ebt_mark_mt_check, | |
fc0e3df4 | 44 | .matchsize = sizeof(struct ebt_mark_m_info), |
1da177e4 LT |
45 | .me = THIS_MODULE, |
46 | }; | |
47 | ||
65b4b4e8 | 48 | static int __init ebt_mark_m_init(void) |
1da177e4 | 49 | { |
043ef46c | 50 | return xt_register_match(&ebt_mark_mt_reg); |
1da177e4 LT |
51 | } |
52 | ||
65b4b4e8 | 53 | static void __exit ebt_mark_m_fini(void) |
1da177e4 | 54 | { |
043ef46c | 55 | xt_unregister_match(&ebt_mark_mt_reg); |
1da177e4 LT |
56 | } |
57 | ||
65b4b4e8 AM |
58 | module_init(ebt_mark_m_init); |
59 | module_exit(ebt_mark_m_fini); | |
f776c4cd | 60 | MODULE_DESCRIPTION("Ebtables: Packet mark match"); |
1da177e4 | 61 | MODULE_LICENSE("GPL"); |