[ARP]: Introduce the arp_hdr_len helper.

[deliverable/linux.git] / net / ipv4 / arp.c

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 8e17f65f400215a72c3ac3effb908071255d2747..69e80bd9774af9c8d9bf4115ee76e2fda36c8bdf 100644 (file)
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -570,14 +570,13 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
         *      Allocate a buffer
         */
 
-       skb = alloc_skb(sizeof(struct arphdr)+ 2*(dev->addr_len+4)
-                               + LL_RESERVED_SPACE(dev), GFP_ATOMIC);
+       skb = alloc_skb(arp_hdr_len(dev) + LL_RESERVED_SPACE(dev), GFP_ATOMIC);
        if (skb == NULL)
                return NULL;
 
        skb_reserve(skb, LL_RESERVED_SPACE(dev));
        skb_reset_network_header(skb);
-       arp = (struct arphdr *) skb_put(skb,sizeof(struct arphdr) + 2*(dev->addr_len+4));
+       arp = (struct arphdr *) skb_put(skb, arp_hdr_len(dev));
        skb->dev = dev;
        skb->protocol = htons(ETH_P_ARP);
        if (src_hw == NULL)
@@ -916,9 +915,7 @@ static int arp_rcv(struct sk_buff *skb, struct net_device *dev,
                goto freeskb;
 
        /* ARP header, plus 2 device addresses, plus 2 IP addresses.  */
-       if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
-                                (2 * dev->addr_len) +
-                                (2 * sizeof(u32)))))
+       if (!pskb_may_pull(skb, arp_hdr_len(dev)))
                goto freeskb;
 
        arp = arp_hdr(skb);