X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fif_arp.h;h=4d3401812e6cbfe237902c51a00e7123a96fc4cb;hb=65ae24b1811650f2bc5b0b85ea8b0bff6b5bf4a9;hp=7f5714214ee35e787aa77dfbd3b8cf63d21ca620;hpb=7ff3e52cf2947ebd38c84159af68e5a29d228f6c;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/if_arp.h b/include/linux/if_arp.h
index 7f5714214ee..4d3401812e6 100644
--- a/include/linux/if_arp.h
+++ b/include/linux/if_arp.h
@@ -52,6 +52,7 @@
 #define ARPHRD_ROSE	270
 #define ARPHRD_X25	271		/* CCITT X.25			*/
 #define ARPHRD_HWX25	272		/* Boards with X.25 in firmware	*/
+#define ARPHRD_CAN	280		/* Controller Area Network      */
 #define ARPHRD_PPP	512
 #define ARPHRD_CISCO	513		/* Cisco HDLC	 		*/
 #define ARPHRD_HDLC	ARPHRD_CISCO
@@ -148,4 +149,19 @@ struct arphdr
 
 };
 
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+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 */