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 ARCnet interface. 7 * 8 * Authors: David Woodhouse and Avery Pennarun 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 */ 15 16#ifndef _LINUX_IF_ARCNET_H 17#define _LINUX_IF_ARCNET_H 18 19#include <linux/types.h> 20#include <linux/if_ether.h> 21 22 23/* 24 * These are the defined ARCnet Protocol ID's. 25 */ 26 27/* CAP mode */ 28/* No macro but uses 1-8 */ 29 30/* RFC1201 Protocol ID's */ 31#define ARC_P_IP 212 /* 0xD4 */ 32#define ARC_P_IPV6 196 /* 0xC4: RFC2497 */ 33#define ARC_P_ARP 213 /* 0xD5 */ 34#define ARC_P_RARP 214 /* 0xD6 */ 35#define ARC_P_IPX 250 /* 0xFA */ 36#define ARC_P_NOVELL_EC 236 /* 0xEC */ 37 38/* Old RFC1051 Protocol ID's */ 39#define ARC_P_IP_RFC1051 240 /* 0xF0 */ 40#define ARC_P_ARP_RFC1051 241 /* 0xF1 */ 41 42/* MS LanMan/WfWg "NDIS" encapsulation */ 43#define ARC_P_ETHER 232 /* 0xE8 */ 44 45/* Unsupported/indirectly supported protocols */ 46#define ARC_P_DATAPOINT_BOOT 0 /* very old Datapoint equipment */ 47#define ARC_P_DATAPOINT_MOUNT 1 48#define ARC_P_POWERLAN_BEACON 8 /* Probably ATA-Netbios related */ 49#define ARC_P_POWERLAN_BEACON2 243 /* 0xF3 */ 50#define ARC_P_LANSOFT 251 /* 0xFB - what is this? */ 51#define ARC_P_ATALK 0xDD 52 53/* Hardware address length */ 54#define ARCNET_ALEN 1 55 56/* 57 * The RFC1201-specific components of an arcnet packet header. 58 */ 59struct arc_rfc1201 { 60 __u8 proto; /* protocol ID field - varies */ 61 __u8 split_flag; /* for use with split packets */ 62 __be16 sequence; /* sequence number */ 63 __u8 payload[0]; /* space remaining in packet (504 bytes)*/ 64}; 65#define RFC1201_HDR_SIZE 4 66 67 68/* 69 * The RFC1051-specific components. 70 */ 71struct arc_rfc1051 { 72 __u8 proto; /* ARC_P_RFC1051_ARP/RFC1051_IP */ 73 __u8 payload[0]; /* 507 bytes */ 74}; 75#define RFC1051_HDR_SIZE 1 76 77 78/* 79 * The ethernet-encap-specific components. We have a real ethernet header 80 * and some data. 81 */ 82struct arc_eth_encap { 83 __u8 proto; /* Always ARC_P_ETHER */ 84 struct ethhdr eth; /* standard ethernet header (yuck!) */ 85 __u8 payload[0]; /* 493 bytes */ 86}; 87#define ETH_ENCAP_HDR_SIZE 14 88 89 90struct arc_cap { 91 __u8 proto; 92 __u8 cookie[sizeof(int)]; /* Actually NOT sent over the network */ 93 union { 94 __u8 ack; 95 __u8 raw[0]; /* 507 bytes */ 96 } mes; 97}; 98 99/* 100 * The data needed by the actual arcnet hardware. 101 * 102 * Now, in the real arcnet hardware, the third and fourth bytes are the 103 * 'offset' specification instead of the length, and the soft data is at 104 * the _end_ of the 512-byte buffer. We hide this complexity inside the 105 * driver. 106 */ 107struct arc_hardware { 108 __u8 source, /* source ARCnet - filled in automagically */ 109 dest, /* destination ARCnet - 0 for broadcast */ 110 offset[2]; /* offset bytes (some weird semantics) */ 111}; 112#define ARC_HDR_SIZE 4 113 114/* 115 * This is an ARCnet frame header, as seen by the kernel (and userspace, 116 * when you do a raw packet capture). 117 */ 118struct archdr { 119 /* hardware requirements */ 120 struct arc_hardware hard; 121 122 /* arcnet encapsulation-specific bits */ 123 union { 124 struct arc_rfc1201 rfc1201; 125 struct arc_rfc1051 rfc1051; 126 struct arc_eth_encap eth_encap; 127 struct arc_cap cap; 128 __u8 raw[0]; /* 508 bytes */ 129 } soft; 130}; 131 132#endif /* _LINUX_IF_ARCNET_H */ 133