1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Global definitions for the Token-Ring IEEE 802.5 interface. 7 * 8 * Version: @(#)if_tr.h 0.0 07/11/94 9 * 10 * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 11 * Donald Becker, <becker@super.org> 12 * Peter De Schrijver, <stud11@cc4.kuleuven.ac.be> 13 * 14 * This program is free software; you can redistribute it and/or 15 * modify it under the terms of the GNU General Public License 16 * as published by the Free Software Foundation; either version 17 * 2 of the License, or (at your option) any later version. 18 */ 19 #ifndef _LINUX_IF_TR_H 20 #define _LINUX_IF_TR_H 21 22 #include <linux/types.h> 23 #include <asm/byteorder.h> /* For __be16 */ 24 25 /* IEEE 802.5 Token-Ring magic constants. The frame sizes omit the preamble 26 and FCS/CRC (frame check sequence). */ 27 #define TR_ALEN 6 /* Octets in one token-ring addr */ 28 #define TR_HLEN (sizeof(struct trh_hdr)+sizeof(struct trllc)) 29 #define AC 0x10 30 #define LLC_FRAME 0x40 31 32 /* LLC and SNAP constants */ 33 #define EXTENDED_SAP 0xAA 34 #define UI_CMD 0x03 35 36 /* This is an Token-Ring frame header. */ 37 struct trh_hdr { 38 __u8 ac; /* access control field */ 39 __u8 fc; /* frame control field */ 40 __u8 daddr[TR_ALEN]; /* destination address */ 41 __u8 saddr[TR_ALEN]; /* source address */ 42 __be16 rcf; /* route control field */ 43 __be16 rseg[8]; /* routing registers */ 44 }; 45 46 #ifdef __KERNEL__ 47 #include <linux/skbuff.h> 48 tr_hdr(const struct sk_buff * skb)49static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb) 50 { 51 return (struct trh_hdr *)skb_mac_header(skb); 52 } 53 #endif 54 55 /* This is an Token-Ring LLC structure */ 56 struct trllc { 57 __u8 dsap; /* destination SAP */ 58 __u8 ssap; /* source SAP */ 59 __u8 llc; /* LLC control field */ 60 __u8 protid[3]; /* protocol id */ 61 __be16 ethertype; /* ether type field */ 62 }; 63 64 /* Token-Ring statistics collection data. */ 65 struct tr_statistics { 66 unsigned long rx_packets; /* total packets received */ 67 unsigned long tx_packets; /* total packets transmitted */ 68 unsigned long rx_bytes; /* total bytes received */ 69 unsigned long tx_bytes; /* total bytes transmitted */ 70 unsigned long rx_errors; /* bad packets received */ 71 unsigned long tx_errors; /* packet transmit problems */ 72 unsigned long rx_dropped; /* no space in linux buffers */ 73 unsigned long tx_dropped; /* no space available in linux */ 74 unsigned long multicast; /* multicast packets received */ 75 unsigned long transmit_collision; 76 77 /* detailed Token-Ring errors. See IBM Token-Ring Network 78 Architecture for more info */ 79 80 unsigned long line_errors; 81 unsigned long internal_errors; 82 unsigned long burst_errors; 83 unsigned long A_C_errors; 84 unsigned long abort_delimiters; 85 unsigned long lost_frames; 86 unsigned long recv_congest_count; 87 unsigned long frame_copied_errors; 88 unsigned long frequency_errors; 89 unsigned long token_errors; 90 unsigned long dummy1; 91 }; 92 93 /* source routing stuff */ 94 #define TR_RII 0x80 95 #define TR_RCF_DIR_BIT 0x80 96 #define TR_RCF_LEN_MASK 0x1f00 97 #define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */ 98 #define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */ 99 #define TR_RCF_FRAME2K 0x20 100 #define TR_RCF_BROADCAST_MASK 0xC000 101 #define TR_MAXRIFLEN 18 102 103 #endif /* _LINUX_IF_TR_H */ 104