X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fif_arp.h;h=4d3401812e6cbfe237902c51a00e7123a96fc4cb;hb=18ce3751ccd488c78d3827e9f6bf54e6322676fb;hp=296e8e86e91d1c33052ea2b27ad3b1d8f86895db;hpb=7924e4f6519dd5b349ed146fe9fe35206730be67;p=linux-2.6

diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index 296e8e86e9..4d3401812e 100644
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -156,6 +156,12 @@ static inline struct arphdr *arp_hdr(const struct sk_buff *skb)
 {
 	return (struct arphdr *)skb_network_header(skb);
 }
+
+static inline int arp_hdr_len(struct net_device *dev)
+{
+	/* ARP header, plus 2 device addresses, plus 2 IP addresses. */
+	return sizeof(struct arphdr) + (dev->addr_len + sizeof(u32)) * 2;
+}
 #endif
 
 #endif	/* _LINUX_IF_ARP_H */