Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ebt_mark_m |
| 3 | * |
| 4 | * Authors: |
| 5 | * Bart De Schuymer <bdschuym@pandora.be> |
| 6 | * |
| 7 | * July, 2002 |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <linux/netfilter_bridge/ebtables.h> |
| 12 | #include <linux/netfilter_bridge/ebt_mark_m.h> |
| 13 | #include <linux/module.h> |
| 14 | |
| 15 | static int ebt_filter_mark(const struct sk_buff *skb, |
| 16 | const struct net_device *in, const struct net_device *out, const void *data, |
| 17 | unsigned int datalen) |
| 18 | { |
Jan Engelhardt | abfdf1c | 2008-01-31 03:59:24 -0800 | [diff] [blame] | 19 | const struct ebt_mark_m_info *info = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | |
| 21 | if (info->bitmask & EBT_MARK_OR) |
Thomas Graf | 82e91ff | 2006-11-09 15:19:14 -0800 | [diff] [blame] | 22 | return !(!!(skb->mark & info->mask) ^ info->invert); |
| 23 | return !(((skb->mark & info->mask) == info->mark) ^ info->invert); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | } |
| 25 | |
| 26 | static int ebt_mark_check(const char *tablename, unsigned int hookmask, |
| 27 | const struct ebt_entry *e, void *data, unsigned int datalen) |
| 28 | { |
Jan Engelhardt | abfdf1c | 2008-01-31 03:59:24 -0800 | [diff] [blame] | 29 | const struct ebt_mark_m_info *info = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_m_info))) |
| 32 | return -EINVAL; |
| 33 | if (info->bitmask & ~EBT_MARK_MASK) |
| 34 | return -EINVAL; |
| 35 | if ((info->bitmask & EBT_MARK_OR) && (info->bitmask & EBT_MARK_AND)) |
| 36 | return -EINVAL; |
| 37 | if (!info->bitmask) |
| 38 | return -EINVAL; |
| 39 | return 0; |
| 40 | } |
| 41 | |
| 42 | static struct ebt_match filter_mark = |
| 43 | { |
| 44 | .name = EBT_MARK_MATCH, |
| 45 | .match = ebt_filter_mark, |
| 46 | .check = ebt_mark_check, |
| 47 | .me = THIS_MODULE, |
| 48 | }; |
| 49 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 50 | static int __init ebt_mark_m_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | { |
| 52 | return ebt_register_match(&filter_mark); |
| 53 | } |
| 54 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 55 | static void __exit ebt_mark_m_fini(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
| 57 | ebt_unregister_match(&filter_mark); |
| 58 | } |
| 59 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 60 | module_init(ebt_mark_m_init); |
| 61 | module_exit(ebt_mark_m_fini); |
Jan Engelhardt | f776c4c | 2008-01-31 04:00:30 -0800 | [diff] [blame^] | 62 | MODULE_DESCRIPTION("Ebtables: Packet mark match"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | MODULE_LICENSE("GPL"); |