Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-token.c
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c8cf0f94
PA
1/*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
16 * written permission.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 *
21 * Hacked version of print-ether.c Larry Lile <lile@stdio.com>
22 *
23 * Further tweaked to more closely resemble print-fddi.c
24 * Guy Harris <guy@alum.mit.edu>
25 */
26#ifndef lint
27static const char rcsid[] _U_ =
28 "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.25.2.2 2005/11/13 12:13:01 guy Exp $";
29#endif
30
31#ifdef HAVE_CONFIG_H
32#include "config.h"
33#endif
34
35#include <tcpdump-stdinc.h>
36
37#include <pcap.h>
38#include <stdio.h>
39#include <string.h>
40
41#include "interface.h"
42#include "addrtoname.h"
43#include "ethertype.h"
44
45#include "ether.h"
46#include "token.h"
47
48/* Extract src, dst addresses */
49static inline void
50extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst)
51{
52 memcpy(fdst, (const char *)trp->token_dhost, 6);
53 memcpy(fsrc, (const char *)trp->token_shost, 6);
54}
55
56/*
57 * Print the TR MAC header
58 */
59static inline void
60token_hdr_print(register const struct token_header *trp, register u_int length,
61 register const u_char *fsrc, register const u_char *fdst)
62{
63 const char *srcname, *dstname;
64
65 srcname = etheraddr_string(fsrc);
66 dstname = etheraddr_string(fdst);
67
68 if (vflag)
69 (void) printf("%02x %02x %s %s %d: ",
70 trp->token_ac,
71 trp->token_fc,
72 srcname, dstname,
73 length);
74 else
75 printf("%s %s %d: ", srcname, dstname, length);
76}
77
78static const char *broadcast_indicator[] = {
79 "Non-Broadcast", "Non-Broadcast",
80 "Non-Broadcast", "Non-Broadcast",
81 "All-routes", "All-routes",
82 "Single-route", "Single-route"
83};
84
85static const char *direction[] = {
86 "Forward", "Backward"
87};
88
89static const char *largest_frame[] = {
90 "516",
91 "1500",
92 "2052",
93 "4472",
94 "8144",
95 "11407",
96 "17800",
97 "??"
98};
99
100u_int
101token_print(const u_char *p, u_int length, u_int caplen)
102{
103 const struct token_header *trp;
104 u_short extracted_ethertype;
105 struct ether_header ehdr;
106 u_int route_len = 0, hdr_len = TOKEN_HDRLEN;
107 int seg;
108
109 trp = (const struct token_header *)p;
110
111 if (caplen < TOKEN_HDRLEN) {
112 printf("[|token-ring]");
113 return hdr_len;
114 }
115
116 /*
117 * Get the TR addresses into a canonical form
118 */
119 extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr));
120
121 /* Adjust for source routing information in the MAC header */
122 if (IS_SOURCE_ROUTED(trp)) {
123 /* Clear source-routed bit */
124 *ESRC(&ehdr) &= 0x7f;
125
126 if (eflag)
127 token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
128
129 route_len = RIF_LENGTH(trp);
130 if (vflag) {
131 printf("%s ", broadcast_indicator[BROADCAST(trp)]);
132 printf("%s", direction[DIRECTION(trp)]);
133
134 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
135 printf(" [%d:%d]", RING_NUMBER(trp, seg),
136 BRIDGE_NUMBER(trp, seg));
137 } else {
138 printf("rt = %x", ntohs(trp->token_rcf));
139
140 for (seg = 0; seg < SEGMENT_COUNT(trp); seg++)
141 printf(":%x", ntohs(trp->token_rseg[seg]));
142 }
143 printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]);
144 } else {
145 if (eflag)
146 token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr));
147 }
148
149 /* Skip over token ring MAC header and routing information */
150 hdr_len += route_len;
151 length -= hdr_len;
152 p += hdr_len;
153 caplen -= hdr_len;
154
155 /* Frame Control field determines interpretation of packet */
156 if (FRAME_TYPE(trp) == TOKEN_FC_LLC) {
157 /* Try to print the LLC-layer header & higher layers */
158 if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
159 &extracted_ethertype) == 0) {
160 /* ether_type not known, print raw packet */
161 if (!eflag)
162 token_hdr_print(trp,
163 length + TOKEN_HDRLEN + route_len,
164 ESRC(&ehdr), EDST(&ehdr));
165 if (extracted_ethertype) {
166 printf("(LLC %s) ",
167 etherproto_string(htons(extracted_ethertype)));
168 }
169 if (!suppress_default_print)
170 default_print(p, caplen);
171 }
172 } else {
173 /* Some kinds of TR packet we cannot handle intelligently */
174 /* XXX - dissect MAC packets if frame type is 0 */
175 if (!eflag)
176 token_hdr_print(trp, length + TOKEN_HDRLEN + route_len,
177 ESRC(&ehdr), EDST(&ehdr));
178 if (!suppress_default_print)
179 default_print(p, caplen);
180 }
181 return (hdr_len);
182}
183
184/*
185 * This is the top level routine of the printer. 'p' points
186 * to the TR header of the packet, 'h->ts' is the timestamp,
187 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
188 * is the number of bytes actually captured.
189 */
190u_int
191token_if_print(const struct pcap_pkthdr *h, const u_char *p)
192{
193 return (token_print(p, h->len, h->caplen));
194}