dist/tcpdump/token.h

   1 /*      $NetBSD$        */
   2
   3 /* @(#) Header: /tcpdump/master/tcpdump/token.h,v 1.6 2002/12/11 07:14:12 guy Exp (LBL) */
   4 /*
   5  * Copyright (c) 1998, Larry Lile
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice unmodified, this list of conditions, and the following
  13  *    disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  */
  31
  32 #define TOKEN_HDRLEN            14
  33 #define TOKEN_RING_MAC_LEN      6
  34 #define ROUTING_SEGMENT_MAX     16
  35 #define IS_SOURCE_ROUTED(trp)   ((trp)->token_shost[0] & 0x80)
  36 #define FRAME_TYPE(trp)         (((trp)->token_fc & 0xC0) >> 6)
  37 #define TOKEN_FC_LLC            1
  38
  39 #define BROADCAST(trp)          ((ntohs((trp)->token_rcf) & 0xE000) >> 13)
  40 #define RIF_LENGTH(trp)         ((ntohs((trp)->token_rcf) & 0x1f00) >> 8)
  41 #define DIRECTION(trp)          ((ntohs((trp)->token_rcf) & 0x0080) >> 7)
  42 #define LARGEST_FRAME(trp)      ((ntohs((trp)->token_rcf) & 0x0070) >> 4)
  43 #define RING_NUMBER(trp, x)     ((ntohs((trp)->token_rseg[x]) & 0xfff0) >> 4)
  44 #define BRIDGE_NUMBER(trp, x)   ((ntohs((trp)->token_rseg[x]) & 0x000f))
  45 #define SEGMENT_COUNT(trp)      ((int)((RIF_LENGTH(trp) - 2) / 2))
  46
  47 struct token_header {
  48         u_int8_t  token_ac;
  49         u_int8_t  token_fc;
  50         u_int8_t  token_dhost[TOKEN_RING_MAC_LEN];
  51         u_int8_t  token_shost[TOKEN_RING_MAC_LEN];
  52         u_int16_t token_rcf;
  53         u_int16_t token_rseg[ROUTING_SEGMENT_MAX];
  54 };