include/uapi/linux/if_arcnet.h

   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  */
  58 struct 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  */
  69 struct 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  */
  79 struct 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
  86 struct 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  */
 104 struct 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  */
 115 struct 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 */