54 lines
2.4 KiB
C
54 lines
2.4 KiB
C
/* @(#) $Header: /tcpdump/master/tcpdump/token.h,v 1.6 2002-12-11 07:14:12 guy Exp $ (LBL) */
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/*
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* Copyright (c) 1998, Larry Lile
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* 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 the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#define TOKEN_HDRLEN 14
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#define TOKEN_RING_MAC_LEN 6
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#define ROUTING_SEGMENT_MAX 16
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#define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
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#define FRAME_TYPE(trp) (((trp)->token_fc & 0xC0) >> 6)
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#define TOKEN_FC_LLC 1
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#define BROADCAST(trp) ((ntohs((trp)->token_rcf) & 0xE000) >> 13)
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#define RIF_LENGTH(trp) ((ntohs((trp)->token_rcf) & 0x1f00) >> 8)
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#define DIRECTION(trp) ((ntohs((trp)->token_rcf) & 0x0080) >> 7)
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#define LARGEST_FRAME(trp) ((ntohs((trp)->token_rcf) & 0x0070) >> 4)
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#define RING_NUMBER(trp, x) ((ntohs((trp)->token_rseg[x]) & 0xfff0) >> 4)
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#define BRIDGE_NUMBER(trp, x) ((ntohs((trp)->token_rseg[x]) & 0x000f))
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#define SEGMENT_COUNT(trp) ((int)((RIF_LENGTH(trp) - 2) / 2))
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struct token_header {
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u_int8_t token_ac;
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u_int8_t token_fc;
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u_int8_t token_dhost[TOKEN_RING_MAC_LEN];
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u_int8_t token_shost[TOKEN_RING_MAC_LEN];
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u_int16_t token_rcf;
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u_int16_t token_rseg[ROUTING_SEGMENT_MAX];
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};
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