/* * ebt_mark * * Authors: * Bart De Schuymer * * July, 2002 * */ /* The mark target can be used in any chain, * I believe adding a mangle table just for marking is total overkill. * Marking a frame doesn't really change anything in the frame anyway. */ #include #include #include static int ebt_target_mark(struct sk_buff **pskb, unsigned int hooknr, const struct net_device *in, const struct net_device *out, const void *data, unsigned int datalen) { struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data; if ((*pskb)->nfmark != info->mark) { (*pskb)->nfmark = info->mark; (*pskb)->nfcache |= NFC_ALTERED; } return info->target; } static int ebt_target_mark_check(const char *tablename, unsigned int hookmask, const struct ebt_entry *e, void *data, unsigned int datalen) { struct ebt_mark_t_info *info = (struct ebt_mark_t_info *)data; if (datalen != sizeof(struct ebt_mark_t_info)) return -EINVAL; if (BASE_CHAIN && info->target == EBT_RETURN) return -EINVAL; CLEAR_BASE_CHAIN_BIT; if (INVALID_TARGET) return -EINVAL; return 0; } static struct ebt_target mark_target = { .name = EBT_MARK_TARGET, .target = ebt_target_mark, .check = ebt_target_mark_check, .me = THIS_MODULE, }; static int __init init(void) { return ebt_register_target(&mark_target); } static void __exit fini(void) { ebt_unregister_target(&mark_target); } module_init(init); module_exit(fini); MODULE_LICENSE("GPL");