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