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 <asm/byteorder.h> /* For __be16 */ 23 24 /* IEEE 802.5 Token-Ring magic constants. The frame sizes omit the preamble 25 and FCS/CRC (frame check sequence). */ 26 #define TR_ALEN 6 /* Octets in one token-ring addr */ 27 #define TR_HLEN (sizeof(struct trh_hdr)+sizeof(struct trllc)) 28 #define AC 0x10 29 #define LLC_FRAME 0x40 30 31 /* LLC and SNAP constants */ 32 #define EXTENDED_SAP 0xAA 33 #define UI_CMD 0x03 34 35 /* This is an Token-Ring frame header. */ 36 struct trh_hdr { 37 __u8 ac; /* access control field */ 38 __u8 fc; /* frame control field */ 39 __u8 daddr[TR_ALEN]; /* destination address */ 40 __u8 saddr[TR_ALEN]; /* source address */ 41 __be16 rcf; /* route control field */ 42 __be16 rseg[8]; /* routing registers */ 43 }; 44 45 #ifdef __KERNEL__ 46 #include <linux/skbuff.h> 47 tr_hdr(const struct sk_buff * skb)48static inline struct trh_hdr *tr_hdr(const struct sk_buff *skb) 49 { 50 return (struct trh_hdr *)skb->mac.raw; 51 } 52 #ifdef CONFIG_SYSCTL 53 extern struct ctl_table tr_table[]; 54 #endif 55 #endif 56 57 /* This is an Token-Ring LLC structure */ 58 struct trllc { 59 __u8 dsap; /* destination SAP */ 60 __u8 ssap; /* source SAP */ 61 __u8 llc; /* LLC control field */ 62 __u8 protid[3]; /* protocol id */ 63 __be16 ethertype; /* ether type field */ 64 }; 65 66 /* Token-Ring statistics collection data. */ 67 struct tr_statistics { 68 unsigned long rx_packets; /* total packets received */ 69 unsigned long tx_packets; /* total packets transmitted */ 70 unsigned long rx_bytes; /* total bytes received */ 71 unsigned long tx_bytes; /* total bytes transmitted */ 72 unsigned long rx_errors; /* bad packets received */ 73 unsigned long tx_errors; /* packet transmit problems */ 74 unsigned long rx_dropped; /* no space in linux buffers */ 75 unsigned long tx_dropped; /* no space available in linux */ 76 unsigned long multicast; /* multicast packets received */ 77 unsigned long transmit_collision; 78 79 /* detailed Token-Ring errors. See IBM Token-Ring Network 80 Architecture for more info */ 81 82 unsigned long line_errors; 83 unsigned long internal_errors; 84 unsigned long burst_errors; 85 unsigned long A_C_errors; 86 unsigned long abort_delimiters; 87 unsigned long lost_frames; 88 unsigned long recv_congest_count; 89 unsigned long frame_copied_errors; 90 unsigned long frequency_errors; 91 unsigned long token_errors; 92 unsigned long dummy1; 93 }; 94 95 /* source routing stuff */ 96 #define TR_RII 0x80 97 #define TR_RCF_DIR_BIT 0x80 98 #define TR_RCF_LEN_MASK 0x1f00 99 #define TR_RCF_BROADCAST 0x8000 /* all-routes broadcast */ 100 #define TR_RCF_LIMITED_BROADCAST 0xC000 /* single-route broadcast */ 101 #define TR_RCF_FRAME2K 0x20 102 #define TR_RCF_BROADCAST_MASK 0xC000 103 #define TR_MAXRIFLEN 18 104 105 #endif /* _LINUX_IF_TR_H */ 106