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, |
Patrick McHardy | fe1cb10 | 2006-08-22 00:35:47 -0700 | [diff] [blame] | 30 | const void *targinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 32 | const struct xt_mark_target_info *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Jan Engelhardt | 2822b0d | 2007-02-07 15:06:43 -0800 | [diff] [blame^] | 34 | (*pskb)->mark = markinfo->mark; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 35 | return XT_CONTINUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | static unsigned int |
| 39 | target_v1(struct sk_buff **pskb, |
| 40 | const struct net_device *in, |
| 41 | const struct net_device *out, |
| 42 | unsigned int hooknum, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 43 | const struct xt_target *target, |
Patrick McHardy | fe1cb10 | 2006-08-22 00:35:47 -0700 | [diff] [blame] | 44 | const void *targinfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 46 | const struct xt_mark_target_info_v1 *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | int mark = 0; |
| 48 | |
| 49 | switch (markinfo->mode) { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 50 | case XT_MARK_SET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | mark = markinfo->mark; |
| 52 | break; |
| 53 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 54 | case XT_MARK_AND: |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 55 | mark = (*pskb)->mark & markinfo->mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | break; |
| 57 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 58 | case XT_MARK_OR: |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 59 | mark = (*pskb)->mark | markinfo->mark; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | break; |
| 61 | } |
| 62 | |
Jan Engelhardt | 2822b0d | 2007-02-07 15:06:43 -0800 | [diff] [blame^] | 63 | (*pskb)->mark = mark; |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 64 | return XT_CONTINUE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | |
| 68 | static int |
| 69 | checkentry_v0(const char *tablename, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 70 | const void *entry, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 71 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | void *targinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | unsigned int hook_mask) |
| 74 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 75 | struct xt_mark_target_info *markinfo = targinfo; |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 76 | |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 77 | if (markinfo->mark > 0xffffffff) { |
| 78 | printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n"); |
| 79 | return 0; |
| 80 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | return 1; |
| 82 | } |
| 83 | |
| 84 | static int |
| 85 | checkentry_v1(const char *tablename, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 86 | const void *entry, |
Patrick McHardy | c498673 | 2006-03-20 18:02:56 -0800 | [diff] [blame] | 87 | const struct xt_target *target, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | void *targinfo, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | unsigned int hook_mask) |
| 90 | { |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 91 | struct xt_mark_target_info_v1 *markinfo = targinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 93 | if (markinfo->mode != XT_MARK_SET |
| 94 | && markinfo->mode != XT_MARK_AND |
| 95 | && markinfo->mode != XT_MARK_OR) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | printk(KERN_WARNING "MARK: unknown mode %u\n", |
| 97 | markinfo->mode); |
| 98 | return 0; |
| 99 | } |
Harald Welte | bf3a46a | 2005-08-09 19:22:01 -0700 | [diff] [blame] | 100 | if (markinfo->mark > 0xffffffff) { |
| 101 | printk(KERN_WARNING "MARK: Only supports 32bit wide mark\n"); |
| 102 | return 0; |
| 103 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | return 1; |
| 105 | } |
| 106 | |
Patrick McHardy | be7263b | 2006-09-20 12:06:10 -0700 | [diff] [blame] | 107 | #ifdef CONFIG_COMPAT |
| 108 | struct compat_xt_mark_target_info_v1 { |
| 109 | compat_ulong_t mark; |
| 110 | u_int8_t mode; |
| 111 | u_int8_t __pad1; |
| 112 | u_int16_t __pad2; |
| 113 | }; |
| 114 | |
| 115 | static void compat_from_user_v1(void *dst, void *src) |
| 116 | { |
| 117 | struct compat_xt_mark_target_info_v1 *cm = src; |
| 118 | struct xt_mark_target_info_v1 m = { |
| 119 | .mark = cm->mark, |
| 120 | .mode = cm->mode, |
| 121 | }; |
| 122 | memcpy(dst, &m, sizeof(m)); |
| 123 | } |
| 124 | |
| 125 | static int compat_to_user_v1(void __user *dst, void *src) |
| 126 | { |
| 127 | struct xt_mark_target_info_v1 *m = src; |
| 128 | struct compat_xt_mark_target_info_v1 cm = { |
| 129 | .mark = m->mark, |
| 130 | .mode = m->mode, |
| 131 | }; |
| 132 | return copy_to_user(dst, &cm, sizeof(cm)) ? -EFAULT : 0; |
| 133 | } |
| 134 | #endif /* CONFIG_COMPAT */ |
| 135 | |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 136 | static struct xt_target xt_mark_target[] = { |
| 137 | { |
| 138 | .name = "MARK", |
| 139 | .family = AF_INET, |
| 140 | .revision = 0, |
| 141 | .checkentry = checkentry_v0, |
| 142 | .target = target_v0, |
| 143 | .targetsize = sizeof(struct xt_mark_target_info), |
| 144 | .table = "mangle", |
| 145 | .me = THIS_MODULE, |
| 146 | }, |
| 147 | { |
| 148 | .name = "MARK", |
| 149 | .family = AF_INET, |
| 150 | .revision = 1, |
| 151 | .checkentry = checkentry_v1, |
| 152 | .target = target_v1, |
| 153 | .targetsize = sizeof(struct xt_mark_target_info_v1), |
Patrick McHardy | be7263b | 2006-09-20 12:06:10 -0700 | [diff] [blame] | 154 | #ifdef CONFIG_COMPAT |
| 155 | .compatsize = sizeof(struct compat_xt_mark_target_info_v1), |
| 156 | .compat_from_user = compat_from_user_v1, |
| 157 | .compat_to_user = compat_to_user_v1, |
| 158 | #endif |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 159 | .table = "mangle", |
| 160 | .me = THIS_MODULE, |
| 161 | }, |
| 162 | { |
| 163 | .name = "MARK", |
| 164 | .family = AF_INET6, |
| 165 | .revision = 0, |
| 166 | .checkentry = checkentry_v0, |
| 167 | .target = target_v0, |
| 168 | .targetsize = sizeof(struct xt_mark_target_info), |
| 169 | .table = "mangle", |
| 170 | .me = THIS_MODULE, |
| 171 | }, |
Harald Welte | 2e4e6a1 | 2006-01-12 13:30:04 -0800 | [diff] [blame] | 172 | }; |
| 173 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 174 | static int __init xt_mark_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 176 | return xt_register_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
| 178 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 179 | static void __exit xt_mark_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | { |
Patrick McHardy | 4470bbc | 2006-08-22 00:34:04 -0700 | [diff] [blame] | 181 | xt_unregister_targets(xt_mark_target, ARRAY_SIZE(xt_mark_target)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 184 | module_init(xt_mark_init); |
| 185 | module_exit(xt_mark_fini); |