projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * ebt_mark | |
| 3 | * | |
| 4 | * Authors: | |
| 5 | * Bart De Schuymer <bdschuym@pandora.be> | |
| 6 | * | |
| 7 | * July, 2002 | |
| 8 | * | |
| 9 | */ | |
| 10 | ||
| 11 | /* The mark target can be used in any chain, | |
| 12 | * I believe adding a mangle table just for marking is total overkill. | |
| 13 | * Marking a frame doesn't really change anything in the frame anyway. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/netfilter_bridge/ebtables.h> | |
| 17 | #include <linux/netfilter_bridge/ebt_mark_t.h> | |
| 18 | #include <linux/module.h> | |
| 19 | ||
| 20 | static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr, | |
| 21 | const struct net_device *in, const struct net_device *out, | |
| 22 | const void *data, unsigned int datalen) | |
| 23 | { | |
| 24 | struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data; | |
| b18dfa90 | 25 | int action = info->target & -16; |
| 1da177e4 | 26 | |
| b18dfa90 | 27 | if (action == MARK_SET_VALUE) |
| 82e91ffe | 28 | (*pskb)->mark = info->mark; |
| b18dfa90 | 29 | else if (action == MARK_OR_VALUE) |
| 82e91ffe | 30 | (*pskb)->mark |= info->mark; |
| b18dfa90 | 31 | else if (action == MARK_AND_VALUE) |
| 82e91ffe | 32 | (*pskb)->mark &= info->mark; |
| b18dfa90 | 33 | else |
| 82e91ffe | 34 | (*pskb)->mark ^= info->mark; |
| 6869c4d8 | 35 | |
| d12cdc3c | 36 | return info->target | ~EBT_VERDICT_BITS; |
| 1da177e4 LT |
37 | } |
| 38 | ||
| 39 | static int ebt_target_mark_check(const char *tablename, unsigned int hookmask, | |
| 40 | const struct ebt_entry *e, void *data, unsigned int datalen) | |
| 41 | { | |
| 42 | struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data; | |
| b18dfa90 | 43 | int tmp; |
| 1da177e4 LT |
44 | |
| 45 | if (datalen != EBT_ALIGN(sizeof(struct ebt_mark_t_info))) | |
| 46 | return -EINVAL; | |
| d12cdc3c | 47 | tmp = info->target | ~EBT_VERDICT_BITS; |
| b18dfa90 | 48 | if (BASE_CHAIN && tmp == EBT_RETURN) |
| 1da177e4 LT |
49 | return -EINVAL; |
| 50 | CLEAR_BASE_CHAIN_BIT; | |
| b18dfa90 BDS |
51 | if (tmp < -NUM_STANDARD_TARGETS || tmp >= 0) |
| 52 | return -EINVAL; | |
| d12cdc3c | 53 | tmp = info->target & ~EBT_VERDICT_BITS; |
| b18dfa90 BDS |
54 | if (tmp != MARK_SET_VALUE && tmp != MARK_OR_VALUE && |
| 55 | tmp != MARK_AND_VALUE && tmp != MARK_XOR_VALUE) | |
| 1da177e4 LT |
56 | return -EINVAL; |
| 57 | return 0; | |
| 58 | } | |
| 59 | ||
| 60 | static struct ebt_target mark_target = | |
| 61 | { | |
| 62 | .name = EBT_MARK_TARGET, | |
| 63 | .target = ebt_target_mark, | |
| 64 | .check = ebt_target_mark_check, | |
| 65 | .me = THIS_MODULE, | |
| 66 | }; | |
| 67 | ||
| 65b4b4e8 | 68 | static int __init ebt_mark_init(void) |
| 1da177e4 LT |
69 | { |
| 70 | return ebt_register_target(&mark_target); | |
| 71 | } | |
| 72 | ||
| 65b4b4e8 | 73 | static void __exit ebt_mark_fini(void) |
| 1da177e4 LT |
74 | { |
| 75 | ebt_unregister_target(&mark_target); | |
| 76 | } | |
| 77 | ||
| 65b4b4e8 AM |
78 | module_init(ebt_mark_init); |
| 79 | module_exit(ebt_mark_fini); | |
| 1da177e4 | 80 | MODULE_LICENSE("GPL"); |