[ARP]: Introduce the arp_hdr_len helper.

[net-next-2.6.git] / net / ipv4 / netfilter / arp_tables.c

diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index a7591ce344d2c18a747c717ded8fa96671e2dcc8..9b590448618470b9299bf85be12e5f0c2d07348c 100644 (file)
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -233,10 +233,7 @@ unsigned int arpt_do_table(struct sk_buff *skb,
        void *table_base;
        struct xt_table_info *private;
 
-       /* ARP header, plus 2 device addresses, plus 2 IP addresses.  */
-       if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
-                                (2 * skb->dev->addr_len) +
-                                (2 * sizeof(u32)))))
+       if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
                return NF_DROP;
 
        indev = in ? in->name : nulldevname;