contrib/tcpdump-3.9/token.h

   1 /* @(#) $Header: /tcpdump/master/tcpdump/token.h,v 1.6 2002/12/11 07:14:12 guy Exp $ (LBL) */
   2 /*
   3  * Copyright (c) 1998, Larry Lile
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice unmodified, this list of conditions, and the following
  11  *    disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  */
  29
  30 #define TOKEN_HDRLEN            14
  31 #define TOKEN_RING_MAC_LEN      6
  32 #define ROUTING_SEGMENT_MAX     16
  33 #define IS_SOURCE_ROUTED(trp)   ((trp)->token_shost[0] & 0x80)
  34 #define FRAME_TYPE(trp)         (((trp)->token_fc & 0xC0) >> 6)
  35 #define TOKEN_FC_LLC            1
  36
  37 #define BROADCAST(trp)          ((ntohs((trp)->token_rcf) & 0xE000) >> 13)
  38 #define RIF_LENGTH(trp)         ((ntohs((trp)->token_rcf) & 0x1f00) >> 8)
  39 #define DIRECTION(trp)          ((ntohs((trp)->token_rcf) & 0x0080) >> 7)
  40 #define LARGEST_FRAME(trp)      ((ntohs((trp)->token_rcf) & 0x0070) >> 4)
  41 #define RING_NUMBER(trp, x)     ((ntohs((trp)->token_rseg[x]) & 0xfff0) >> 4)
  42 #define BRIDGE_NUMBER(trp, x)   ((ntohs((trp)->token_rseg[x]) & 0x000f))
  43 #define SEGMENT_COUNT(trp)      ((int)((RIF_LENGTH(trp) - 2) / 2))
  44
  45 struct token_header {
  46         u_int8_t  token_ac;
  47         u_int8_t  token_fc;
  48         u_int8_t  token_dhost[TOKEN_RING_MAC_LEN];
  49         u_int8_t  token_shost[TOKEN_RING_MAC_LEN];
  50         u_int16_t token_rcf;
  51         u_int16_t token_rseg[ROUTING_SEGMENT_MAX];
  52 };