Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* This is a module which is used for setting the NFMARK field of an skb. */ |
| 2 | |
| 3 | /* (C) 1999-2001 Marc Boucher <marc@mbsi.ca> |
| 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/ip.h> |
| 13 | #include <net/checksum.h> |
| 14 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 15 | #include <linux/netfilter/x_tables.h> |
| 16 | #include <linux/netfilter/xt_MARK.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
| 18 | MODULE_LICENSE("GPL"); |
| 19 | MODULE_AUTHOR("Marc Boucher <marc@mbsi.ca>"); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 20 | MODULE_DESCRIPTION("ip[6]tables MARK modification module"); |
| 21 | MODULE_ALIAS("ipt_MARK"); |
| 22 | MODULE_ALIAS("ip6t_MARK"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | static unsigned int |
| 25 | target_v0(struct sk_buff **pskb, |
| 26 | const struct net_device *in, |
| 27 | const struct net_device *out, |
| 28 | unsigned int hooknum, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 29 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | const void *targinfo, |
| 31 | void *userinfo) |
| 32 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 33 | const struct xt_mark_target_info *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 35 | if((*pskb)->nfmark != markinfo->mark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | (*pskb)->nfmark = markinfo->mark; |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 37 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 38 | return XT_CONTINUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | } |
| 40 | |
| 41 | static unsigned int |
| 42 | target_v1(struct sk_buff **pskb, |
| 43 | const struct net_device *in, |
| 44 | const struct net_device *out, |
| 45 | unsigned int hooknum, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 46 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | const void *targinfo, |
| 48 | void *userinfo) |
| 49 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 50 | const struct xt_mark_target_info_v1 *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | int mark = 0; |
| 52 | |
| 53 | switch (markinfo->mode) { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 54 | case XT_MARK_SET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | mark = markinfo->mark; |
| 56 | break; |
| 57 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 58 | case XT_MARK_AND: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | mark = (*pskb)->nfmark & markinfo->mark; |
| 60 | break; |
| 61 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 62 | case XT_MARK_OR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | mark = (*pskb)->nfmark | markinfo->mark; |
| 64 | break; |
| 65 | } |
| 66 | |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 67 | if((*pskb)->nfmark != mark) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | (*pskb)->nfmark = mark; |
Harald Welte | 6869c4d | 2005-08-09 19:24:19 -0700 | [diff] [blame] | 69 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 70 | return XT_CONTINUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | |
| 74 | static int |
| 75 | checkentry_v0(const char *tablename, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 76 | const void *entry, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 77 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | void *targinfo, |
| 79 | unsigned int targinfosize, |
| 80 | unsigned int hook_mask) |
| 81 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 82 | struct xt_mark_target_info *markinfo = targinfo; |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 83 | |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 84 | if (markinfo->mark > 0xffffffff) { |
| 85 | printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n"); |
| 86 | return 0; |
| 87 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | return 1; |
| 89 | } |
| 90 | |
| 91 | static int |
| 92 | checkentry_v1(const char *tablename, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 93 | const void *entry, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 94 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | void *targinfo, |
| 96 | unsigned int targinfosize, |
| 97 | unsigned int hook_mask) |
| 98 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 99 | struct xt_mark_target_info_v1 *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 101 | if (markinfo->mode != XT_MARK_SET |
| 102 | && markinfo->mode != XT_MARK_AND |
| 103 | && markinfo->mode != XT_MARK_OR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | printk(KERN_WARNING "MARK: unknown mode %u\n", |
| 105 | markinfo->mode); |
| 106 | return 0; |
| 107 | } |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 108 | if (markinfo->mark > 0xffffffff) { |
| 109 | printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n"); |
| 110 | return 0; |
| 111 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | return 1; |
| 113 | } |
| 114 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 115 | static struct xt_target ipt_mark_reg_v0 = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | .name = "MARK", |
| 117 | .target = target_v0, |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 118 | .targetsize = sizeof(struct xt_mark_target_info), |
| 119 | .table = "mangle", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | .checkentry = checkentry_v0, |
| 121 | .me = THIS_MODULE, |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 122 | .family = AF_INET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | .revision = 0, |
| 124 | }; |
| 125 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 126 | static struct xt_target ipt_mark_reg_v1 = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | .name = "MARK", |
| 128 | .target = target_v1, |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 129 | .targetsize = sizeof(struct xt_mark_target_info_v1), |
| 130 | .table = "mangle", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | .checkentry = checkentry_v1, |
| 132 | .me = THIS_MODULE, |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 133 | .family = AF_INET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | .revision = 1, |
| 135 | }; |
| 136 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 137 | static struct xt_target ip6t_mark_reg_v0 = { |
| 138 | .name = "MARK", |
| 139 | .target = target_v0, |
Patrick McHardy | 5d04bff | 2006-03-20 18:01:58 -0800 | [diff] [blame] | 140 | .targetsize = sizeof(struct xt_mark_target_info), |
| 141 | .table = "mangle", |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 142 | .checkentry = checkentry_v0, |
| 143 | .me = THIS_MODULE, |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 144 | .family = AF_INET6, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 145 | .revision = 0, |
| 146 | }; |
| 147 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 148 | static int __init xt_mark_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | { |
| 150 | int err; |
| 151 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 152 | err = xt_register_target(&ipt_mark_reg_v0); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 153 | if (err) |
| 154 | return err; |
| 155 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 156 | err = xt_register_target(&ipt_mark_reg_v1); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 157 | if (err) |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 158 | xt_unregister_target(&ipt_mark_reg_v0); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 159 | |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 160 | err = xt_register_target(&ip6t_mark_reg_v0); |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 161 | if (err) { |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 162 | xt_unregister_target(&ipt_mark_reg_v0); |
| 163 | xt_unregister_target(&ipt_mark_reg_v1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | } |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | return err; |
| 167 | } |
| 168 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 169 | static void __exit xt_mark_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Pablo Neira Ayuso | a45049c | 2006-03-22 13:55:40 -0800 | [diff] [blame] | 171 | xt_unregister_target(&ipt_mark_reg_v0); |
| 172 | xt_unregister_target(&ipt_mark_reg_v1); |
| 173 | xt_unregister_target(&ip6t_mark_reg_v0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | } |
| 175 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 176 | module_init(xt_mark_init); |
| 177 | module_exit(xt_mark_fini); |