77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#) Header: fddi.h,v 1.6 94/06/14 20:12:35 leres Exp (LBL)
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*/
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/*
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* Based on Ultrix if_fddi.h
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*/
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/*
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* This stuff should come from a system header file, but there's no
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* obviously portable way to do that and it's not really going
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* to change from system to system (except for the padding business).
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*/
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struct fddi_header {
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#if defined(ultrix) || defined(__alpha)
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/* Ultrix pads to make everything line up on a nice boundary */
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#define FDDIPAD 3
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u_char fddi_ph[FDDIPAD];
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#else
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#define FDDIPAD 0
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#endif
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u_char fddi_fc; /* frame control */
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u_char fddi_dhost[6];
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u_char fddi_shost[6];
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};
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/* Useful values for fddi_fc (frame control) field */
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/*
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* FDDI Frame Control bits
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*/
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#define FDDIFC_C 0x80 /* Class bit */
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#define FDDIFC_L 0x40 /* Address length bit */
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#define FDDIFC_F 0x30 /* Frame format bits */
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#define FDDIFC_Z 0x0f /* Control bits */
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/*
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* FDDI Frame Control values. (48-bit addressing only).
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*/
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#define FDDIFC_VOID 0x40 /* Void frame */
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#define FDDIFC_NRT 0x80 /* Nonrestricted token */
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#define FDDIFC_RT 0xc0 /* Restricted token */
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#define FDDIFC_SMT_INFO 0x41 /* SMT Info */
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#define FDDIFC_SMT_NSA 0x4F /* SMT Next station adrs */
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#define FDDIFC_MAC_BEACON 0xc2 /* MAC Beacon frame */
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#define FDDIFC_MAC_CLAIM 0xc3 /* MAC Claim frame */
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#define FDDIFC_LLC_ASYNC 0x50 /* Async. LLC frame */
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#define FDDIFC_LLC_SYNC 0xd0 /* Sync. LLC frame */
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#define FDDIFC_IMP_ASYNC 0x60 /* Implementor Async. */
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#define FDDIFC_IMP_SYNC 0xe0 /* Implementor Synch. */
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#define FDDIFC_SMT 0x40 /* SMT frame */
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#define FDDIFC_MAC 0xc0 /* MAC frame */
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#define FDDIFC_CLFF 0xF0 /* Class/Length/Format bits */
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#define FDDIFC_ZZZZ 0x0F /* Control bits */
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