diff --git a/include/linux/if_arcnet.h b/include/linux/if_arcnet.h
new file mode 100644
index 0000000..af380cb
--- /dev/null
+++ b/include/linux/if_arcnet.h
@@ -0,0 +1,137 @@
+/*
+ * INET         An implementation of the TCP/IP protocol suite for the LINUX
+ *              operating system.  INET is implemented using the  BSD Socket
+ *              interface as the means of communication with the user level.
+ *
+ *              Global definitions for the ARCnet interface.
+ *
+ * Authors:     David Woodhouse and Avery Pennarun
+ *
+ *              This program is free software; you can redistribute it and/or
+ *              modify it under the terms of the GNU General Public License
+ *              as published by the Free Software Foundation; either version
+ *              2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_IF_ARCNET_H
+#define _LINUX_IF_ARCNET_H
+
+#include <linux/if_ether.h>
+
+
+/*
+ *    These are the defined ARCnet Protocol ID's.
+ */
+
+/* CAP mode */
+/* No macro but uses 1-8 */
+
+/* RFC1201 Protocol ID's */
+#define ARC_P_IP		212	/* 0xD4 */
+#define ARC_P_IPV6		196	/* 0xC4: RFC2497 */
+#define ARC_P_ARP		213	/* 0xD5 */
+#define ARC_P_RARP		214	/* 0xD6 */
+#define ARC_P_IPX		250	/* 0xFA */
+#define ARC_P_NOVELL_EC		236	/* 0xEC */
+
+/* Old RFC1051 Protocol ID's */
+#define ARC_P_IP_RFC1051	240	/* 0xF0 */
+#define ARC_P_ARP_RFC1051	241	/* 0xF1 */
+
+/* MS LanMan/WfWg "NDIS" encapsulation */
+#define ARC_P_ETHER		232	/* 0xE8 */
+
+/* Unsupported/indirectly supported protocols */
+#define ARC_P_DATAPOINT_BOOT	0	/* very old Datapoint equipment */
+#define ARC_P_DATAPOINT_MOUNT	1
+#define ARC_P_POWERLAN_BEACON	8	/* Probably ATA-Netbios related */
+#define ARC_P_POWERLAN_BEACON2	243	/* 0xF3 */
+#define ARC_P_LANSOFT		251	/* 0xFB - what is this? */
+#define ARC_P_ATALK		0xDD
+
+/* Hardware address length */
+#define ARCNET_ALEN	1
+
+/*
+ * The RFC1201-specific components of an arcnet packet header.
+ */
+struct arc_rfc1201
+{
+    uint8_t  proto;		/* protocol ID field - varies		*/
+    uint8_t  split_flag;	/* for use with split packets		*/
+    uint16_t sequence;		/* sequence number			*/
+    uint8_t  payload[0];	/* space remaining in packet (504 bytes)*/
+};
+#define RFC1201_HDR_SIZE 4
+
+
+/*
+ * The RFC1051-specific components.
+ */
+struct arc_rfc1051
+{
+    uint8_t proto;		/* ARC_P_RFC1051_ARP/RFC1051_IP	*/
+    uint8_t payload[0];		/* 507 bytes			*/
+};
+#define RFC1051_HDR_SIZE 1
+
+
+/*
+ * The ethernet-encap-specific components.  We have a real ethernet header
+ * and some data.
+ */
+struct arc_eth_encap
+{
+    uint8_t proto;		/* Always ARC_P_ETHER			*/
+    struct ethhdr eth;		/* standard ethernet header (yuck!)	*/
+    uint8_t payload[0];		/* 493 bytes				*/
+};
+#define ETH_ENCAP_HDR_SIZE 14
+
+
+struct arc_cap
+{
+	uint8_t proto;
+	uint8_t cookie[sizeof(int)];   /* Actually NOT sent over the network */
+	union {
+		uint8_t ack;
+		uint8_t raw[0];		/* 507 bytes */
+	} mes;
+};
+
+/*
+ * The data needed by the actual arcnet hardware.
+ *
+ * Now, in the real arcnet hardware, the third and fourth bytes are the
+ * 'offset' specification instead of the length, and the soft data is at
+ * the _end_ of the 512-byte buffer.  We hide this complexity inside the
+ * driver.
+ */
+struct arc_hardware
+{
+    uint8_t  source,		/* source ARCnet - filled in automagically */
+             dest,		/* destination ARCnet - 0 for broadcast    */
+    	     offset[2];		/* offset bytes (some weird semantics)     */
+};
+#define ARC_HDR_SIZE 4
+
+/*
+ * This is an ARCnet frame header, as seen by the kernel (and userspace,
+ * when you do a raw packet capture).
+ */
+struct archdr
+{
+    /* hardware requirements */
+    struct arc_hardware hard;
+     
+    /* arcnet encapsulation-specific bits */
+    union {
+	struct arc_rfc1201   rfc1201;
+	struct arc_rfc1051   rfc1051;
+	struct arc_eth_encap eth_encap;
+	struct arc_cap       cap;
+	uint8_t raw[0];		/* 508 bytes				*/
+    } soft;
+};
+
+#endif				/* _LINUX_IF_ARCNET_H */