Commit | Line | Data |
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17b0d7ef JE |
1 | /* |
2 | * xt_mark - Netfilter module to match NFMARK value | |
3 | * | |
4 | * (C) 1999-2001 Marc Boucher <marc@mbsi.ca> | |
5 | * Copyright © CC Computer Consultants GmbH, 2007 - 2008 | |
6 | * Jan Engelhardt <jengelh@computergmbh.de> | |
1da177e4 | 7 | * |
17b0d7ef JE |
8 | * This program is free software; you can redistribute it and/or modify |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
1da177e4 LT |
11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/skbuff.h> | |
15 | ||
2e4e6a17 HW |
16 | #include <linux/netfilter/xt_mark.h> |
17 | #include <linux/netfilter/x_tables.h> | |
1da177e4 LT |
18 | |
19 | MODULE_LICENSE("GPL"); | |
20 | MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>"); | |
2ae15b64 | 21 | MODULE_DESCRIPTION("Xtables: packet mark match"); |
2e4e6a17 HW |
22 | MODULE_ALIAS("ipt_mark"); |
23 | MODULE_ALIAS("ip6t_mark"); | |
1da177e4 | 24 | |
17b0d7ef | 25 | static bool |
f7108a20 | 26 | mark_mt_v0(const struct sk_buff *skb, const struct xt_match_param *par) |
17b0d7ef | 27 | { |
f7108a20 | 28 | const struct xt_mark_info *info = par->matchinfo; |
17b0d7ef JE |
29 | |
30 | return ((skb->mark & info->mask) == info->mark) ^ info->invert; | |
31 | } | |
32 | ||
1d93a9cb | 33 | static bool |
f7108a20 | 34 | mark_mt(const struct sk_buff *skb, const struct xt_match_param *par) |
1da177e4 | 35 | { |
f7108a20 | 36 | const struct xt_mark_mtinfo1 *info = par->matchinfo; |
1da177e4 | 37 | |
82e91ffe | 38 | return ((skb->mark & info->mask) == info->mark) ^ info->invert; |
1da177e4 LT |
39 | } |
40 | ||
9b4fce7a | 41 | static bool mark_mt_check_v0(const struct xt_mtchk_param *par) |
1da177e4 | 42 | { |
9b4fce7a | 43 | const struct xt_mark_info *minfo = par->matchinfo; |
bf3a46aa | 44 | |
bf3a46aa HW |
45 | if (minfo->mark > 0xffffffff || minfo->mask > 0xffffffff) { |
46 | printk(KERN_WARNING "mark: only supports 32bit mark\n"); | |
ccb79bdc | 47 | return false; |
bf3a46aa | 48 | } |
ccb79bdc | 49 | return true; |
1da177e4 LT |
50 | } |
51 | ||
bc80b656 PM |
52 | #ifdef CONFIG_COMPAT |
53 | struct compat_xt_mark_info { | |
54 | compat_ulong_t mark, mask; | |
55 | u_int8_t invert; | |
56 | u_int8_t __pad1; | |
57 | u_int16_t __pad2; | |
58 | }; | |
59 | ||
17b0d7ef | 60 | static void mark_mt_compat_from_user_v0(void *dst, void *src) |
bc80b656 | 61 | { |
a47362a2 | 62 | const struct compat_xt_mark_info *cm = src; |
bc80b656 PM |
63 | struct xt_mark_info m = { |
64 | .mark = cm->mark, | |
65 | .mask = cm->mask, | |
66 | .invert = cm->invert, | |
67 | }; | |
68 | memcpy(dst, &m, sizeof(m)); | |
69 | } | |
70 | ||
17b0d7ef | 71 | static int mark_mt_compat_to_user_v0(void __user *dst, void *src) |
bc80b656 | 72 | { |
a47362a2 | 73 | const struct xt_mark_info *m = src; |
bc80b656 PM |
74 | struct compat_xt_mark_info cm = { |
75 | .mark = m->mark, | |
76 | .mask = m->mask, | |
77 | .invert = m->invert, | |
78 | }; | |
79 | return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0; | |
80 | } | |
81 | #endif /* CONFIG_COMPAT */ | |
82 | ||
d3c5ee6d | 83 | static struct xt_match mark_mt_reg[] __read_mostly = { |
4470bbc7 PM |
84 | { |
85 | .name = "mark", | |
17b0d7ef | 86 | .revision = 0, |
55b69e91 | 87 | .family = NFPROTO_UNSPEC, |
17b0d7ef JE |
88 | .checkentry = mark_mt_check_v0, |
89 | .match = mark_mt_v0, | |
4470bbc7 | 90 | .matchsize = sizeof(struct xt_mark_info), |
bc80b656 PM |
91 | #ifdef CONFIG_COMPAT |
92 | .compatsize = sizeof(struct compat_xt_mark_info), | |
17b0d7ef JE |
93 | .compat_from_user = mark_mt_compat_from_user_v0, |
94 | .compat_to_user = mark_mt_compat_to_user_v0, | |
bc80b656 | 95 | #endif |
4470bbc7 PM |
96 | .me = THIS_MODULE, |
97 | }, | |
17b0d7ef JE |
98 | { |
99 | .name = "mark", | |
100 | .revision = 1, | |
55b69e91 | 101 | .family = NFPROTO_UNSPEC, |
17b0d7ef JE |
102 | .match = mark_mt, |
103 | .matchsize = sizeof(struct xt_mark_mtinfo1), | |
104 | .me = THIS_MODULE, | |
105 | }, | |
1da177e4 LT |
106 | }; |
107 | ||
d3c5ee6d | 108 | static int __init mark_mt_init(void) |
1da177e4 | 109 | { |
d3c5ee6d | 110 | return xt_register_matches(mark_mt_reg, ARRAY_SIZE(mark_mt_reg)); |
1da177e4 LT |
111 | } |
112 | ||
d3c5ee6d | 113 | static void __exit mark_mt_exit(void) |
1da177e4 | 114 | { |
d3c5ee6d | 115 | xt_unregister_matches(mark_mt_reg, ARRAY_SIZE(mark_mt_reg)); |
1da177e4 LT |
116 | } |
117 | ||
d3c5ee6d JE |
118 | module_init(mark_mt_init); |
119 | module_exit(mark_mt_exit); |