Jan Engelhardt | 17b0d7e | 2008-01-14 23:41:11 -0800 | [diff] [blame] | 1 | /* |
| 2 | * xt_mark - Netfilter module to match NFMARK value |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Jan Engelhardt | 17b0d7e | 2008-01-14 23:41:11 -0800 | [diff] [blame] | 4 | * (C) 1999-2001 Marc Boucher <marc@mbsi.ca> |
| 5 | * Copyright © CC Computer Consultants GmbH, 2007 - 2008 |
Jan Engelhardt | 4725c72 | 2009-06-12 19:02:27 +0200 | [diff] [blame] | 6 | * Jan Engelhardt <jengelh@medozas.de> |
Jan Engelhardt | 17b0d7e | 2008-01-14 23:41:11 -0800 | [diff] [blame] | 7 | * |
| 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. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/skbuff.h> |
| 15 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 16 | #include <linux/netfilter/xt_mark.h> |
| 17 | #include <linux/netfilter/x_tables.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| 19 | MODULE_LICENSE("GPL"); |
| 20 | MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>"); |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 21 | MODULE_DESCRIPTION("Xtables: packet mark operations"); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 22 | MODULE_ALIAS("ipt_mark"); |
| 23 | MODULE_ALIAS("ip6t_mark"); |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 24 | MODULE_ALIAS("ipt_MARK"); |
| 25 | MODULE_ALIAS("ip6t_MARK"); |
| 26 | |
| 27 | static unsigned int |
Jan Engelhardt | 4b560b4 | 2009-07-05 19:43:26 +0200 | [diff] [blame] | 28 | mark_tg(struct sk_buff *skb, const struct xt_action_param *par) |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 29 | { |
| 30 | const struct xt_mark_tginfo2 *info = par->targinfo; |
| 31 | |
| 32 | skb->mark = (skb->mark & ~info->mask) ^ info->mark; |
| 33 | return XT_CONTINUE; |
| 34 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | |
Jan Engelhardt | 1d93a9c | 2007-07-07 22:15:35 -0700 | [diff] [blame] | 36 | static bool |
Jan Engelhardt | 62fc805 | 2009-07-07 20:42:08 +0200 | [diff] [blame] | 37 | mark_mt(const struct sk_buff *skb, struct xt_action_param *par) |
Jan Engelhardt | 17b0d7e | 2008-01-14 23:41:11 -0800 | [diff] [blame] | 38 | { |
Jan Engelhardt | f7108a20 | 2008-10-08 11:35:18 +0200 | [diff] [blame] | 39 | const struct xt_mark_mtinfo1 *info = par->matchinfo; |
Jan Engelhardt | 17b0d7e | 2008-01-14 23:41:11 -0800 | [diff] [blame] | 40 | |
| 41 | return ((skb->mark & info->mask) == info->mark) ^ info->invert; |
| 42 | } |
| 43 | |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 44 | static struct xt_target mark_tg_reg __read_mostly = { |
| 45 | .name = "MARK", |
| 46 | .revision = 2, |
| 47 | .family = NFPROTO_UNSPEC, |
| 48 | .target = mark_tg, |
| 49 | .targetsize = sizeof(struct xt_mark_tginfo2), |
| 50 | .me = THIS_MODULE, |
| 51 | }; |
| 52 | |
Jan Engelhardt | 4725c72 | 2009-06-12 19:02:27 +0200 | [diff] [blame] | 53 | static struct xt_match mark_mt_reg __read_mostly = { |
| 54 | .name = "mark", |
| 55 | .revision = 1, |
| 56 | .family = NFPROTO_UNSPEC, |
| 57 | .match = mark_mt, |
| 58 | .matchsize = sizeof(struct xt_mark_mtinfo1), |
| 59 | .me = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | }; |
| 61 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 62 | static int __init mark_mt_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 64 | int ret; |
| 65 | |
| 66 | ret = xt_register_target(&mark_tg_reg); |
| 67 | if (ret < 0) |
| 68 | return ret; |
| 69 | ret = xt_register_match(&mark_mt_reg); |
| 70 | if (ret < 0) { |
| 71 | xt_unregister_target(&mark_tg_reg); |
| 72 | return ret; |
| 73 | } |
| 74 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | } |
| 76 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 77 | static void __exit mark_mt_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Jan Engelhardt | 4725c72 | 2009-06-12 19:02:27 +0200 | [diff] [blame] | 79 | xt_unregister_match(&mark_mt_reg); |
Jan Engelhardt | 28b9498 | 2009-02-28 03:23:57 +0100 | [diff] [blame] | 80 | xt_unregister_target(&mark_tg_reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | } |
| 82 | |
Jan Engelhardt | d3c5ee6 | 2007-12-04 23:24:03 -0800 | [diff] [blame] | 83 | module_init(mark_mt_init); |
| 84 | module_exit(mark_mt_exit); |