5 * Bart De Schuymer <bdschuym@pandora.be>
11 #include <linux/netfilter_bridge/ebtables.h>
12 #include <linux/netfilter_bridge/ebt_nat.h>
13 #include <linux/module.h>
16 static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr,
17 const struct net_device *in, const struct net_device *out,
18 const void *data, unsigned int datalen)
20 struct ebt_nat_info *info = (struct ebt_nat_info *) data;
22 if (skb_shared(*pskb) || skb_cloned(*pskb)) {
25 nskb = skb_copy(*pskb, GFP_ATOMIC);
29 skb_set_owner_w(nskb, (*pskb)->sk);
33 memcpy(((**pskb).mac.ethernet)->h_source, info->mac,
34 ETH_ALEN * sizeof(unsigned char));
38 static int ebt_target_snat_check(const char *tablename, unsigned int hookmask,
39 const struct ebt_entry *e, void *data, unsigned int datalen)
41 struct ebt_nat_info *info = (struct ebt_nat_info *) data;
43 if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
45 if (BASE_CHAIN && info->target == EBT_RETURN)
48 if (strcmp(tablename, "nat"))
50 if (hookmask & ~(1 << NF_BR_POST_ROUTING))
57 static struct ebt_target snat =
59 .name = EBT_SNAT_TARGET,
60 .target = ebt_target_snat,
61 .check = ebt_target_snat_check,
65 static int __init init(void)
67 return ebt_register_target(&snat);
70 static void __exit fini(void)
72 ebt_unregister_target(&snat);
77 MODULE_LICENSE("GPL");