5 * Bart De Schuymer <bdschuym@pandora.be>
11 #include <linux/netfilter.h>
12 #include <linux/netfilter_bridge/ebtables.h>
13 #include <linux/netfilter_bridge/ebt_redirect.h>
14 #include <linux/module.h>
16 #include "../br_private.h"
18 static int ebt_target_redirect(struct sk_buff *skb, unsigned int hooknr,
19 const struct net_device *in, const struct net_device *out,
20 const void *data, unsigned int datalen)
22 const struct ebt_redirect_info *info = data;
24 if (skb_make_writable(skb, 0))
27 if (hooknr != NF_BR_BROUTING)
28 memcpy(eth_hdr(skb)->h_dest,
29 in->br_port->br->dev->dev_addr, ETH_ALEN);
31 memcpy(eth_hdr(skb)->h_dest, in->dev_addr, ETH_ALEN);
32 skb->pkt_type = PACKET_HOST;
36 static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask,
37 const struct ebt_entry *e, void *data, unsigned int datalen)
39 const struct ebt_redirect_info *info = data;
41 if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info)))
43 if (BASE_CHAIN && info->target == EBT_RETURN)
46 if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&
47 (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )
54 static struct ebt_target redirect_target __read_mostly = {
55 .name = EBT_REDIRECT_TARGET,
56 .target = ebt_target_redirect,
57 .check = ebt_target_redirect_check,
61 static int __init ebt_redirect_init(void)
63 return ebt_register_target(&redirect_target);
66 static void __exit ebt_redirect_fini(void)
68 ebt_unregister_target(&redirect_target);
71 module_init(ebt_redirect_init);
72 module_exit(ebt_redirect_fini);
73 MODULE_DESCRIPTION("Ebtables: Packet redirection to localhost");
74 MODULE_LICENSE("GPL");