fddi.h

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/*
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that: (1) source code distributions
 * retain the above copyright notice and this paragraph in its entirety, (2)
 * distributions including binary code include the above copyright notice and
 * this paragraph in its entirety in the documentation or other materials
 * provided with the distribution, and (3) all advertising materials mentioning
 * features or use of this software display the following acknowledgement:
 * ``This product includes software developed by the University of California,
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 * the University nor the names of its contributors may be used to endorse
 * or promote products derived from this software without specific prior
 * written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * @(#) $Header: fddi.h,v 1.8 96/06/03 03:06:04 leres Exp $ (LBL)
 */

/*
 * Based on Ultrix if_fddi.h
 */

/*
 * This stuff should come from a system header file, but there's no
 * obviously portable way to do that and it's not really going
 * to change from system to system (except for the padding business).
 */

struct fddi_header {
       u_char fddi_fc;             /* frame control */
       u_char fddi_dhost[6];
       u_char fddi_shost[6];
     };


/* Useful values for fddi_fc (frame control) field
 */

/*
 * FDDI Frame Control bits
 */
#define FDDIFC_C          0x80     /* Class bit */
#define FDDIFC_L          0x40     /* Address length bit */
#define FDDIFC_F          0x30     /* Frame format bits */
#define FDDIFC_Z          0x0f     /* Control bits */

/*
 * FDDI Frame Control values. (48-bit addressing only).
 */
#define FDDIFC_VOID       0x40     /* Void frame */
#define FDDIFC_NRT        0x80     /* Nonrestricted token */
#define FDDIFC_RT         0xc0     /* Restricted token */
#define FDDIFC_SMT_INFO   0x41     /* SMT Info */
#define FDDIFC_SMT_NSA    0x4F     /* SMT Next station adrs */
#define FDDIFC_MAC_BEACON 0xc2     /* MAC Beacon frame */
#define FDDIFC_MAC_CLAIM  0xc3     /* MAC Claim frame */
#define FDDIFC_LLC_ASYNC  0x50     /* Async. LLC frame */
#define FDDIFC_LLC_SYNC   0xd0     /* Sync. LLC frame */
#define FDDIFC_IMP_ASYNC  0x60     /* Implementor Async. */
#define FDDIFC_IMP_SYNC   0xe0     /* Implementor Synch. */
#define FDDIFC_SMT        0x40     /* SMT frame */
#define FDDIFC_MAC        0xc0     /* MAC frame */

#define FDDIFC_CLFF       0xF0     /* Class/Length/Format bits */
#define FDDIFC_ZZZZ       0x0F     /* Control bits */