token.h

This directory contains source code for tcpdump, a tool for network monitoring and data acquisition

/*
 * 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_HDR_LEN         14
#define TOKEN_RING_MAC_LEN    6
#define ROUTING_SEGMENT_MAX   16

#define IS_SOURCE_ROUTED(tp)  ((tp)->ether_shost[0] & 0x80)
#define BROADCAST(tp)         ((ntohs((tp)->rcf) & 0xE000) >> 13)
#define RIF_LENGTH(tp)        ((ntohs((tp)->rcf) & 0x1f00) >> 8)
#define DIRECTION(tp)         ((ntohs((tp)->rcf) & 0x0080) >> 7)
#define LARGEST_FRAME(tp)     ((ntohs((tp)->rcf) & 0x0070) >> 4)
#define RING_NUMBER(tp,x)     ((ntohs((tp)->rseg[x]) & 0xfff0) >> 4)
#define BRIDGE_NUMBER(tp,x)   ((ntohs((tp)->rseg[x]) & 0x000f))
#define SEGMENT_COUNT(tp)     ((RIF_LENGTH(tp) - 2) / 2)

static char *broadcast_indicator[] = {
            "Non-Broadcast", "Non-Broadcast",
            "Non-Broadcast", "Non-Broadcast",
            "All-routes", "All-routes",
            "Single-route", "Single-route"
          };

static char *direction[] = {
            "Forward", "Backward"
          };

static char *largest_frame[] = {
            "516", "1500", "2052", "4472",
            "8144", "11407", "17800", ""
          };

struct token_header {
       u_char  ac;
       u_char  fc;
       u_char  ether_dhost [TOKEN_RING_MAC_LEN];
       u_char  ether_shost [TOKEN_RING_MAC_LEN];
       u_short rcf;
       u_short rseg [ROUTING_SEGMENT_MAX];
     };