token.h revision 50514 
1/*
2 * Copyright (c) 1998, Larry Lile
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 */
28
29#define TOKEN_HDR_LEN       14
30#define TOKEN_RING_MAC_LEN  6
31#define ROUTING_SEGMENT_MAX 16
32#define IS_SOURCE_ROUTED    (tp->ether_shost[0] & 0x80)
33#define BROADCAST           ((ntohs(tp->rcf) & 0xE000) >> 13)
34#define RIF_LENGTH          ((ntohs(tp->rcf) & 0x1f00) >> 8)
35#define DIRECTION           ((ntohs(tp->rcf) & 0x0080) >> 7)
36#define LARGEST_FRAME       ((ntohs(tp->rcf) & 0x0070) >> 4)
37#define RING_NUMBER(x)      ((ntohs(tp->rseg[x]) & 0xfff0) >> 4)
38#define BRIDGE_NUMBER(x)    ((ntohs(tp->rseg[x]) & 0x000f))
39#define SEGMENT_COUNT       ((RIF_LENGTH - 2) / 2)
40
41char *broadcast_indicator[] = { "Non-Broadcast", "Non-Broadcast",
42                                "Non-Broadcast", "Non-Broadcast",
43                                "All-routes",    "All-routes",
44                                "Single-route",  "Single-route"};
45
46char *direction[] = { "Forward", "Backward"};
47
48char *largest_frame[] = { "516", "1500", "2052", "4472", "8144",
49                          "11407", "17800", ""};
50
51
52struct token_header {
53        u_char   ac;
54        u_char   fc;
55        u_char   ether_dhost[TOKEN_RING_MAC_LEN];
56        u_char   ether_shost[TOKEN_RING_MAC_LEN];
57        u_short  rcf;
58        u_short  rseg[ROUTING_SEGMENT_MAX];
59};
60