Home | History | Annotate | Download | only in tcpdump
      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)		((EXTRACT_16BITS(&(trp)->token_rcf) & 0xE000) >> 13)
     38 #define RIF_LENGTH(trp)		((EXTRACT_16BITS(&(trp)->token_rcf) & 0x1f00) >> 8)
     39 #define DIRECTION(trp)		((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0080) >> 7)
     40 #define LARGEST_FRAME(trp)	((EXTRACT_16BITS(&(trp)->token_rcf) & 0x0070) >> 4)
     41 #define RING_NUMBER(trp, x)	((EXTRACT_16BITS(&(trp)->token_rseg[x]) & 0xfff0) >> 4)
     42 #define BRIDGE_NUMBER(trp, x)	((EXTRACT_16BITS(&(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 };
     53