X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fbridge%2Fnetfilter%2Febt_dnat.c;h=ca64c1cc1b47a1f29d88e5e31f1e04e686ee9895;hb=abf5cdb89d09ca981db10e1a85fd8531440165f2;hp=4582659dff0e1e535b51551003ed45a1af92ebea;hpb=d42510a0f58c2583c37c8e9b7548e3a68545863a;p=linux-2.6

diff --git a/net/bridge/netfilter/ebt_dnat.c b/net/bridge/netfilter/ebt_dnat.c
index 4582659dff..ca64c1cc1b 100644
--- a/net/bridge/netfilter/ebt_dnat.c
+++ b/net/bridge/netfilter/ebt_dnat.c
@@ -8,36 +8,29 @@
  *
  */
 
+#include <linux/netfilter.h>
 #include <linux/netfilter_bridge/ebtables.h>
 #include <linux/netfilter_bridge/ebt_nat.h>
 #include <linux/module.h>
 #include <net/sock.h>
 
-static int ebt_target_dnat(struct sk_buff **pskb, unsigned int hooknr,
+static int ebt_target_dnat(struct sk_buff *skb, unsigned int hooknr,
    const struct net_device *in, const struct net_device *out,
    const void *data, unsigned int datalen)
 {
-	struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+	const struct ebt_nat_info *info = data;
 
-	if (skb_shared(*pskb) || skb_cloned(*pskb)) {
-		struct sk_buff *nskb;
+	if (!skb_make_writable(skb, 0))
+		return EBT_DROP;
 
-		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;
-	}
-	memcpy(eth_hdr(*pskb)->h_dest, info->mac, ETH_ALEN);
+	memcpy(eth_hdr(skb)->h_dest, info->mac, ETH_ALEN);
 	return info->target;
 }
 
 static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask,
    const struct ebt_entry *e, void *data, unsigned int datalen)
 {
-	struct ebt_nat_info *info = (struct ebt_nat_info *)data;
+	const struct ebt_nat_info *info = data;
 
 	if (BASE_CHAIN && info->target == EBT_RETURN)
 		return -EINVAL;
@@ -53,8 +46,7 @@ static int ebt_target_dnat_check(const char *tablename, unsigned int hookmask,
 	return 0;
 }
 
-static struct ebt_target dnat =
-{
+static struct ebt_target dnat __read_mostly = {
 	.name		= EBT_DNAT_TARGET,
 	.target		= ebt_target_dnat,
 	.check		= ebt_target_dnat_check,
@@ -73,4 +65,5 @@ static void __exit ebt_dnat_fini(void)
 
 module_init(ebt_dnat_init);
 module_exit(ebt_dnat_fini);
+MODULE_DESCRIPTION("Ebtables: Destination MAC address translation");
 MODULE_LICENSE("GPL");