include/uapi/linux/if_fddi.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Global definitions for the ANSI FDDI interface.
   8  *
   9  * Version:     @(#)if_fddi.h   1.0.2   Sep 29 2004
  10  *
  11  * Author:      Lawrence V. Stefani, <stefani@lkg.dec.com>
  12  *
  13  *              if_fddi.h is based on previous if_ether.h and if_tr.h work by
  14  *                      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  15  *                      Donald Becker, <becker@super.org>
  16  *                      Alan Cox, <alan@lxorguk.ukuu.org.uk>
  17  *                      Steve Whitehouse, <gw7rrm@eeshack3.swan.ac.uk>
  18  *                      Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
  19  *
  20  *              This program is free software; you can redistribute it and/or
  21  *              modify it under the terms of the GNU General Public License
  22  *              as published by the Free Software Foundation; either version
  23  *              2 of the License, or (at your option) any later version.
  24  */
  25 #ifndef _UAPI_LINUX_IF_FDDI_H
  26 #define _UAPI_LINUX_IF_FDDI_H
  27
  28 #include <linux/types.h>
  29
  30 /*
  31  *  Define max and min legal sizes.  The frame sizes do not include
  32  *  4 byte FCS/CRC (frame check sequence).
  33  */
  34 #define FDDI_K_ALEN             6       /* Octets in one FDDI address */
  35 #define FDDI_K_8022_HLEN        16      /* Total octets in 802.2 header */
  36 #define FDDI_K_SNAP_HLEN        21      /* Total octets in 802.2 SNAP header */
  37 #define FDDI_K_8022_ZLEN        16      /* Min octets in 802.2 frame sans
  38                                            FCS */
  39 #define FDDI_K_SNAP_ZLEN        21      /* Min octets in 802.2 SNAP frame sans
  40                                            FCS */
  41 #define FDDI_K_8022_DLEN        4475    /* Max octets in 802.2 payload */
  42 #define FDDI_K_SNAP_DLEN        4470    /* Max octets in 802.2 SNAP payload */
  43 #define FDDI_K_LLC_ZLEN         13      /* Min octets in LLC frame sans FCS */
  44 #define FDDI_K_LLC_LEN          4491    /* Max octets in LLC frame sans FCS */
  45 #define FDDI_K_OUI_LEN          3       /* Octets in OUI in 802.2 SNAP
  46                                            header */
  47
  48 /* Define FDDI Frame Control (FC) Byte values */
  49 #define FDDI_FC_K_VOID                  0x00
  50 #define FDDI_FC_K_NON_RESTRICTED_TOKEN  0x80
  51 #define FDDI_FC_K_RESTRICTED_TOKEN      0xC0
  52 #define FDDI_FC_K_SMT_MIN               0x41
  53 #define FDDI_FC_K_SMT_MAX               0x4F
  54 #define FDDI_FC_K_MAC_MIN               0xC1
  55 #define FDDI_FC_K_MAC_MAX               0xCF
  56 #define FDDI_FC_K_ASYNC_LLC_MIN         0x50
  57 #define FDDI_FC_K_ASYNC_LLC_DEF         0x54
  58 #define FDDI_FC_K_ASYNC_LLC_MAX         0x5F
  59 #define FDDI_FC_K_SYNC_LLC_MIN          0xD0
  60 #define FDDI_FC_K_SYNC_LLC_MAX          0xD7
  61 #define FDDI_FC_K_IMPLEMENTOR_MIN       0x60
  62 #define FDDI_FC_K_IMPLEMENTOR_MAX       0x6F
  63 #define FDDI_FC_K_RESERVED_MIN          0x70
  64 #define FDDI_FC_K_RESERVED_MAX          0x7F
  65
  66 /* Define LLC and SNAP constants */
  67 #define FDDI_EXTENDED_SAP               0xAA
  68 #define FDDI_UI_CMD                     0x03
  69
  70 /* Define 802.2 Type 1 header */
  71 struct fddi_8022_1_hdr {
  72         __u8    dsap;                   /* destination service access point */
  73         __u8    ssap;                   /* source service access point */
  74         __u8    ctrl;                   /* control byte #1 */
  75 } __attribute__((packed));
  76
  77 /* Define 802.2 Type 2 header */
  78 struct fddi_8022_2_hdr {
  79         __u8    dsap;                   /* destination service access point */
  80         __u8    ssap;                   /* source service access point */
  81         __u8    ctrl_1;                 /* control byte #1 */
  82         __u8    ctrl_2;                 /* control byte #2 */
  83 } __attribute__((packed));
  84
  85 /* Define 802.2 SNAP header */
  86 struct fddi_snap_hdr {
  87         __u8    dsap;                   /* always 0xAA */
  88         __u8    ssap;                   /* always 0xAA */
  89         __u8    ctrl;                   /* always 0x03 */
  90         __u8    oui[FDDI_K_OUI_LEN];    /* organizational universal id */
  91         __be16  ethertype;              /* packet type ID field */
  92 } __attribute__((packed));
  93
  94 /* Define FDDI LLC frame header */
  95 struct fddihdr {
  96         __u8    fc;                     /* frame control */
  97         __u8    daddr[FDDI_K_ALEN];     /* destination address */
  98         __u8    saddr[FDDI_K_ALEN];     /* source address */
  99         union {
 100                 struct fddi_8022_1_hdr  llc_8022_1;
 101                 struct fddi_8022_2_hdr  llc_8022_2;
 102                 struct fddi_snap_hdr    llc_snap;
 103         } hdr;
 104 } __attribute__((packed));
 105
 106
 107 #endif /* _UAPI_LINUX_IF_FDDI_H */