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   1 /*
   2  * Copyright (c) 1992, 1993, 1994, 1995, 1996
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  *
  21  * @(#) $Header: /tcpdump/master/tcpdump/fddi.h,v 1.11 2002-12-11 07:13:51 guy Exp $ (LBL)
  22  */
  23
  24 /*
  25  * Based on Ultrix if_fddi.h
  26  */
  27
  28 /*
  29  * This stuff should come from a system header file, but there's no
  30  * obviously portable way to do that and it's not really going
  31  * to change from system to system (except for the padding business).
  32  */
  33
  34 struct fddi_header {
  35         u_char  fddi_fc;                /* frame control */
  36         u_char  fddi_dhost[6];
  37         u_char  fddi_shost[6];
  38 };
  39
  40 /*
  41  * Length of an FDDI header; note that some compilers may pad
  42  * "struct fddi_header" to a multiple of 4 bytes, for example, so
  43  * "sizeof (struct fddi_header)" may not give the right
  44  * answer.
  45  */
  46 #define FDDI_HDRLEN 13
  47
  48 /* Useful values for fddi_fc (frame control) field */
  49
  50 /*
  51  * FDDI Frame Control bits
  52  */
  53 #define FDDIFC_C                0x80            /* Class bit */
  54 #define FDDIFC_L                0x40            /* Address length bit */
  55 #define FDDIFC_F                0x30            /* Frame format bits */
  56 #define FDDIFC_Z                0x0f            /* Control bits */
  57
  58 /*
  59  * FDDI Frame Control values. (48-bit addressing only).
  60  */
  61 #define FDDIFC_VOID             0x40            /* Void frame */
  62 #define FDDIFC_NRT              0x80            /* Nonrestricted token */
  63 #define FDDIFC_RT               0xc0            /* Restricted token */
  64 #define FDDIFC_SMT_INFO         0x41            /* SMT Info */
  65 #define FDDIFC_SMT_NSA          0x4F            /* SMT Next station adrs */
  66 #define FDDIFC_MAC_BEACON       0xc2            /* MAC Beacon frame */
  67 #define FDDIFC_MAC_CLAIM        0xc3            /* MAC Claim frame */
  68 #define FDDIFC_LLC_ASYNC        0x50            /* Async. LLC frame */
  69 #define FDDIFC_LLC_SYNC         0xd0            /* Sync. LLC frame */
  70 #define FDDIFC_IMP_ASYNC        0x60            /* Implementor Async. */
  71 #define FDDIFC_IMP_SYNC         0xe0            /* Implementor Synch. */
  72 #define FDDIFC_SMT              0x40            /* SMT frame */
  73 #define FDDIFC_MAC              0xc0            /* MAC frame */
  74
  75 #define FDDIFC_CLFF             0xF0            /* Class/Length/Format bits */
  76 #define FDDIFC_ZZZZ             0x0F            /* Control bits */