LXR linux/include/uapi/linux/if

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