[NETFILTER]: ebtables: Update modules' descriptions

[karo-tx-linux.git] / net / bridge / netfilter / ebt_snat.c

diff --git a/net/bridge/netfilter/ebt_snat.c b/net/bridge/netfilter/ebt_snat.c
index a50722182bfe401c62727d5b768c02de794c709c..ed858580b07e01383bfe1761fe07e5ba4623269e 100644 (file)
--- a/net/bridge/netfilter/ebt_snat.c
+++ b/net/bridge/netfilter/ebt_snat.c
@@ -8,6 +8,7 @@
  *
  */
 
+#include <linux/netfilter.h>
 #include <linux/netfilter_bridge/ebtables.h>
 #include <linux/netfilter_bridge/ebt_nat.h>
 #include <linux/module.h>
@@ -15,34 +16,27 @@
 #include <linux/if_arp.h>
 #include <net/arp.h>
 
-static int ebt_target_snat(struct sk_buff **pskb, unsigned int hooknr,
+static int ebt_target_snat(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 NF_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_source, info->mac, ETH_ALEN);
+       memcpy(eth_hdr(skb)->h_source, info->mac, ETH_ALEN);
        if (!(info->target & NAT_ARP_BIT) &&
-           eth_hdr(*pskb)->h_proto == htons(ETH_P_ARP)) {
-               struct arphdr _ah, *ap;
+           eth_hdr(skb)->h_proto == htons(ETH_P_ARP)) {
+               const struct arphdr *ap;
+               struct arphdr _ah;
 
-               ap = skb_header_pointer(*pskb, 0, sizeof(_ah), &_ah);
+               ap = skb_header_pointer(skb, 0, sizeof(_ah), &_ah);
                if (ap == NULL)
                        return EBT_DROP;
                if (ap->ar_hln != ETH_ALEN)
                        goto out;
-               if (skb_store_bits(*pskb, sizeof(_ah), info->mac,ETH_ALEN))
+               if (skb_store_bits(skb, sizeof(_ah), info->mac,ETH_ALEN))
                        return EBT_DROP;
        }
 out:
@@ -52,7 +46,7 @@ out:
 static int ebt_target_snat_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;
        int tmp;
 
        if (datalen != EBT_ALIGN(sizeof(struct ebt_nat_info)))
@@ -94,4 +88,5 @@ static void __exit ebt_snat_fini(void)
 
 module_init(ebt_snat_init);
 module_exit(ebt_snat_fini);
+MODULE_DESCRIPTION("Ebtables: Source MAC address translation");
 MODULE_LICENSE("GPL");