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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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