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diff --git a/include/linux/if_tr.h b/include/linux/if_tr.h
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+/*
+ * 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 Token-Ring IEEE 802.5 interface.
+ *
+ * Version: @(#)if_tr.h 0.0 07/11/94
+ *
+ * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ * Donald Becker, <becker@super.org>
+ * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
+ *
+ * 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_TR_H
+#define _LINUX_IF_TR_H
+
+
+/* IEEE 802.5 Token-Ring magic constants. The frame sizes omit the preamble
+ and FCS/CRC (frame check sequence). */
+#define TR_ALEN 6 /* Octets in one ethernet addr */
+#define TR_HLEN (sizeof(struct trh_hdr)+sizeof(struct trllc))
+#define AC 0x10
+#define LLC_FRAME 0x40
+#if 0
+#define ETH_HLEN 14 /* Total octets in header. */
+#define ETH_ZLEN 60 /* Min. octets in frame sans FCS */
+#define ETH_DATA_LEN 1500 /* Max. octets in payload */
+#define ETH_FRAME_LEN 1514 /* Max. octets in frame sans FCS */
+#endif
+
+
+/* LLC and SNAP constants */
+#define EXTENDED_SAP 0xAA
+#define UI_CMD 0x03
+
+/* This is an Token-Ring frame header. */
+struct trh_hdr {
+ __u8 ac; /* access control field */
+ __u8 fc; /* frame control field */
+ __u8 daddr[TR_ALEN]; /* destination address */
+ __u8 saddr[TR_ALEN]; /* source address */
+ __u16 rcf; /* route control field */
+ __u16 rseg[8]; /* routing registers */
+};
+
+#ifdef __KERNEL__
+#include <linux/skbuff.h>
+
+static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb)
+{
+ return (struct trh_hdr *)skb->mac.raw;
+}
+#endif
+
+/* This is an Token-Ring LLC structure */
+struct trllc {
+ __u8 dsap; /* destination SAP */
+ __u8 ssap; /* source SAP */
+ __u8 llc; /* LLC control field */
+ __u8 protid[3]; /* protocol id */
+ __u16 ethertype; /* ether type field */
+};
+
+/* Token-Ring statistics collection data. */
+struct tr_statistics {
+ unsigned long rx_packets; /* total packets received */
+ unsigned long tx_packets; /* total packets transmitted */
+ unsigned long rx_bytes; /* total bytes received */
+ unsigned long tx_bytes; /* total bytes transmitted */
+ unsigned long rx_errors; /* bad packets received */
+ unsigned long tx_errors; /* packet transmit problems */
+ unsigned long rx_dropped; /* no space in linux buffers */
+ unsigned long tx_dropped; /* no space available in linux */
+ unsigned long multicast; /* multicast packets received */
+ unsigned long transmit_collision;
+
+ /* detailed Token-Ring errors. See IBM Token-Ring Network
+ Architecture for more info */
+
+ unsigned long line_errors;
+ unsigned long internal_errors;
+ unsigned long burst_errors;
+ unsigned long A_C_errors;
+ unsigned long abort_delimiters;
+ unsigned long lost_frames;
+ unsigned long recv_congest_count;
+ unsigned long frame_copied_errors;
+ unsigned long frequency_errors;
+ unsigned long token_errors;
+ unsigned long dummy1;
+};
+
+/* source routing stuff */
+
+#define TR_RII 0x80
+#define TR_RCF_DIR_BIT 0x80
+#define TR_RCF_LEN_MASK 0x1f00
+#define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */
+#define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */
+#define TR_RCF_FRAME2K 0x20
+#define TR_RCF_BROADCAST_MASK 0xC000
+#define TR_MAXRIFLEN 18
+
+#endif /* _LINUX_IF_TR_H */
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