/* *  ebt_redirect * *	Authors: *	Bart De Schuymer <bdschuym@pandora.be> * *  April, 2002 * */#include <linux/netfilter_bridge/ebtables.h>#include <linux/netfilter_bridge/ebt_redirect.h>#include <linux/module.h>#include <net/sock.h>#include "../br_private.h"static int ebt_target_redirect(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_redirect_info *info = (struct ebt_redirect_info *)data;	if (skb_shared(*pskb) || skb_cloned(*pskb)) {		struct sk_buff *nskb;		nskb = skb_copy(*pskb, GFP_ATOMIC);		if (!nskb)			return NF_DROP;		if ((*pskb)->sk)			skb_set_owner_w(nskb, (*pskb)->sk);		kfree_skb(*pskb);		*pskb = nskb;	}	if (hooknr != NF_BR_BROUTING)		memcpy((**pskb).mac.ethernet->h_dest,		   in->br_port->br->dev->dev_addr, ETH_ALEN);	else		memcpy((**pskb).mac.ethernet->h_dest,		   in->dev_addr, ETH_ALEN);	(*pskb)->pkt_type = PACKET_HOST;	return info->target;}static int ebt_target_redirect_check(const char *tablename, unsigned int hookmask,   const struct ebt_entry *e, void *data, unsigned int datalen){	struct ebt_redirect_info *info = (struct ebt_redirect_info *)data;	if (datalen != EBT_ALIGN(sizeof(struct ebt_redirect_info)))		return -EINVAL;	if (BASE_CHAIN && info->target == EBT_RETURN)		return -EINVAL;	CLEAR_BASE_CHAIN_BIT;	if ( (strcmp(tablename, "nat") || hookmask & ~(1 << NF_BR_PRE_ROUTING)) &&	     (strcmp(tablename, "broute") || hookmask & ~(1 << NF_BR_BROUTING)) )		return -EINVAL;	if (INVALID_TARGET)		return -EINVAL;	return 0;}static struct ebt_target redirect_target ={	.name		= EBT_REDIRECT_TARGET,	.target		= ebt_target_redirect,	.check		= ebt_target_redirect_check,	.me		= THIS_MODULE,};static int __init init(void){	return ebt_register_target(&redirect_target);}static void __exit fini(void){	ebt_unregister_target(&redirect_target);}module_init(init);module_exit(fini);MODULE_LICENSE("GPL");