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/* @(#) $Header: /home/pdw/vcvs/repos/iftop/token.h,v 1.2 2003/06/06 22:42:35 pdw Exp $ (LBL) */
/*
* Copyright (c) 1998, Larry Lile
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#define TOKEN_HDRLEN 14
#define TOKEN_RING_MAC_LEN 6
#define ROUTING_SEGMENT_MAX 16
#define IS_SOURCE_ROUTED(trp) ((trp)->token_shost[0] & 0x80)
#define FRAME_TYPE(trp) (((trp)->token_fc & 0xC0) >> 6)
#define TOKEN_FC_LLC 1
#define BROADCAST(trp) ((ntohs((trp)->token_rcf) & 0xE000) >> 13)
#define RIF_LENGTH(trp) ((ntohs((trp)->token_rcf) & 0x1f00) >> 8)
#define DIRECTION(trp) ((ntohs((trp)->token_rcf) & 0x0080) >> 7)
#define LARGEST_FRAME(trp) ((ntohs((trp)->token_rcf) & 0x0070) >> 4)
#define RING_NUMBER(trp, x) ((ntohs((trp)->token_rseg[x]) & 0xfff0) >> 4)
#define BRIDGE_NUMBER(trp, x) ((ntohs((trp)->token_rseg[x]) & 0x000f))
#define SEGMENT_COUNT(trp) ((RIF_LENGTH(trp) - 2) / 2)
struct token_header {
u_int8_t token_ac;
u_int8_t token_fc;
u_int8_t token_dhost[TOKEN_RING_MAC_LEN];
u_int8_t token_shost[TOKEN_RING_MAC_LEN];
u_int16_t token_rcf;
u_int16_t token_rseg[ROUTING_SEGMENT_MAX];
};
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