Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-fddi.c
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c8cf0f94
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1/*
2 * Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997
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
22#ifndef lint
23static const char rcsid[] _U_ =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-fddi.c,v 1.64.2.2 2005/11/13 12:12:59 guy Exp $ (LBL)";
25#endif
26
27#ifdef HAVE_CONFIG_H
28#include "config.h"
29#endif
30
31#include <tcpdump-stdinc.h>
32
33#include <pcap.h>
34#include <stdio.h>
35#include <string.h>
36
37#include "interface.h"
38#include "addrtoname.h"
39#include "ethertype.h"
40
41#include "ether.h"
42#include "fddi.h"
43
44/*
45 * Some FDDI interfaces use bit-swapped addresses.
46 */
47#if defined(ultrix) || defined(__alpha) || defined(__bsdi) || defined(__NetBSD__) || defined(__linux__)
48int fddi_bitswap = 0;
49#else
50int fddi_bitswap = 1;
51#endif
52
53/*
54 * FDDI support for tcpdump, by Jeffrey Mogul [DECWRL], June 1992
55 *
56 * Based in part on code by Van Jacobson, which bears this note:
57 *
58 * NOTE: This is a very preliminary hack for FDDI support.
59 * There are all sorts of wired in constants & nothing (yet)
60 * to print SMT packets as anything other than hex dumps.
61 * Most of the necessary changes are waiting on my redoing
62 * the "header" that a kernel fddi driver supplies to bpf: I
63 * want it to look like one byte of 'direction' (0 or 1
64 * depending on whether the packet was inbound or outbound),
65 * two bytes of system/driver dependent data (anything an
66 * implementor thinks would be useful to filter on and/or
67 * save per-packet, then the real 21-byte FDDI header.
68 * Steve McCanne & I have also talked about adding the
69 * 'direction' byte to all bpf headers (e.g., in the two
70 * bytes of padding on an ethernet header). It's not clear
71 * we could do this in a backwards compatible way & we hate
72 * the idea of an incompatible bpf change. Discussions are
73 * proceeding.
74 *
75 * Also, to really support FDDI (and better support 802.2
76 * over ethernet) we really need to re-think the rather simple
77 * minded assumptions about fixed length & fixed format link
78 * level headers made in gencode.c. One day...
79 *
80 * - vj
81 */
82
83static u_char fddi_bit_swap[] = {
84 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
85 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
86 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
87 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
88 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
89 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
90 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
91 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
92 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
93 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
94 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
95 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
96 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
97 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
98 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
99 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
100 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
101 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
102 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
103 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
104 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
105 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
106 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
107 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
108 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
109 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
110 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
111 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
112 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
113 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
114 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
115 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
116};
117
118/*
119 * Print FDDI frame-control bits
120 */
121static inline void
122print_fddi_fc(u_char fc)
123{
124 switch (fc) {
125
126 case FDDIFC_VOID: /* Void frame */
127 printf("void ");
128 break;
129
130 case FDDIFC_NRT: /* Nonrestricted token */
131 printf("nrt ");
132 break;
133
134 case FDDIFC_RT: /* Restricted token */
135 printf("rt ");
136 break;
137
138 case FDDIFC_SMT_INFO: /* SMT Info */
139 printf("info ");
140 break;
141
142 case FDDIFC_SMT_NSA: /* SMT Next station adrs */
143 printf("nsa ");
144 break;
145
146 case FDDIFC_MAC_BEACON: /* MAC Beacon frame */
147 printf("beacon ");
148 break;
149
150 case FDDIFC_MAC_CLAIM: /* MAC Claim frame */
151 printf("claim ");
152 break;
153
154 default:
155 switch (fc & FDDIFC_CLFF) {
156
157 case FDDIFC_MAC:
158 printf("mac%1x ", fc & FDDIFC_ZZZZ);
159 break;
160
161 case FDDIFC_SMT:
162 printf("smt%1x ", fc & FDDIFC_ZZZZ);
163 break;
164
165 case FDDIFC_LLC_ASYNC:
166 printf("async%1x ", fc & FDDIFC_ZZZZ);
167 break;
168
169 case FDDIFC_LLC_SYNC:
170 printf("sync%1x ", fc & FDDIFC_ZZZZ);
171 break;
172
173 case FDDIFC_IMP_ASYNC:
174 printf("imp_async%1x ", fc & FDDIFC_ZZZZ);
175 break;
176
177 case FDDIFC_IMP_SYNC:
178 printf("imp_sync%1x ", fc & FDDIFC_ZZZZ);
179 break;
180
181 default:
182 printf("%02x ", fc);
183 break;
184 }
185 }
186}
187
188/* Extract src, dst addresses */
189static inline void
190extract_fddi_addrs(const struct fddi_header *fddip, char *fsrc, char *fdst)
191{
192 register int i;
193
194 if (fddi_bitswap) {
195 /*
196 * bit-swap the fddi addresses (isn't the IEEE standards
197 * process wonderful!) then convert them to names.
198 */
199 for (i = 0; i < 6; ++i)
200 fdst[i] = fddi_bit_swap[fddip->fddi_dhost[i]];
201 for (i = 0; i < 6; ++i)
202 fsrc[i] = fddi_bit_swap[fddip->fddi_shost[i]];
203 }
204 else {
205 memcpy(fdst, (const char *)fddip->fddi_dhost, 6);
206 memcpy(fsrc, (const char *)fddip->fddi_shost, 6);
207 }
208}
209
210/*
211 * Print the FDDI MAC header
212 */
213static inline void
214fddi_hdr_print(register const struct fddi_header *fddip, register u_int length,
215 register const u_char *fsrc, register const u_char *fdst)
216{
217 const char *srcname, *dstname;
218
219 srcname = etheraddr_string(fsrc);
220 dstname = etheraddr_string(fdst);
221
222 if (vflag)
223 (void) printf("%02x %s %s %d: ",
224 fddip->fddi_fc,
225 srcname, dstname,
226 length);
227 else if (qflag)
228 printf("%s %s %d: ", srcname, dstname, length);
229 else {
230 (void) print_fddi_fc(fddip->fddi_fc);
231 (void) printf("%s %s %d: ", srcname, dstname, length);
232 }
233}
234
235static inline void
236fddi_smt_print(const u_char *p _U_, u_int length _U_)
237{
238 printf("<SMT printer not yet implemented>");
239}
240
241void
242fddi_print(const u_char *p, u_int length, u_int caplen)
243{
244 const struct fddi_header *fddip = (const struct fddi_header *)p;
245 struct ether_header ehdr;
246 u_short extracted_ethertype;
247
248 if (caplen < FDDI_HDRLEN) {
249 printf("[|fddi]");
250 return;
251 }
252
253 /*
254 * Get the FDDI addresses into a canonical form
255 */
256 extract_fddi_addrs(fddip, (char *)ESRC(&ehdr), (char *)EDST(&ehdr));
257
258 if (eflag)
259 fddi_hdr_print(fddip, length, ESRC(&ehdr), EDST(&ehdr));
260
261 /* Skip over FDDI MAC header */
262 length -= FDDI_HDRLEN;
263 p += FDDI_HDRLEN;
264 caplen -= FDDI_HDRLEN;
265
266 /* Frame Control field determines interpretation of packet */
267 if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_LLC_ASYNC) {
268 /* Try to print the LLC-layer header & higher layers */
269 if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr),
270 &extracted_ethertype) == 0) {
271 /*
272 * Some kinds of LLC packet we cannot
273 * handle intelligently
274 */
275 if (!eflag)
276 fddi_hdr_print(fddip, length + FDDI_HDRLEN,
277 ESRC(&ehdr), EDST(&ehdr));
278 if (extracted_ethertype) {
279 printf("(LLC %s) ",
280 etherproto_string(htons(extracted_ethertype)));
281 }
282 if (!suppress_default_print)
283 default_print(p, caplen);
284 }
285 } else if ((fddip->fddi_fc & FDDIFC_CLFF) == FDDIFC_SMT)
286 fddi_smt_print(p, caplen);
287 else {
288 /* Some kinds of FDDI packet we cannot handle intelligently */
289 if (!eflag)
290 fddi_hdr_print(fddip, length + FDDI_HDRLEN, ESRC(&ehdr),
291 EDST(&ehdr));
292 if (!suppress_default_print)
293 default_print(p, caplen);
294 }
295}
296
297/*
298 * This is the top level routine of the printer. 'p' points
299 * to the FDDI header of the packet, 'h->ts' is the timestamp,
300 * 'h->len' is the length of the packet off the wire, and 'h->caplen'
301 * is the number of bytes actually captured.
302 */
303u_int
304fddi_if_print(const struct pcap_pkthdr *h, register const u_char *p)
305{
306 fddi_print(p, h->len, h->caplen);
307
308 return (FDDI_HDRLEN);
309}