Move tcpdump-3.9/ to tcpdump/. No need for a versioned dir.
[dragonfly.git] / contrib / tcpdump / print-atalk.c
CommitLineData
c8cf0f94
PA
1/*
2 * Copyright (c) 1988, 1989, 1990, 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 * Format and print AppleTalk packets.
22 */
23
24#ifndef lint
25static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.81 2004/05/01 09:41:50 hannes Exp $ (LBL)";
27#endif
28
29#ifdef HAVE_CONFIG_H
30#include "config.h"
31#endif
32
33#include <tcpdump-stdinc.h>
34
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <pcap.h>
39
40#include "interface.h"
41#include "addrtoname.h"
42#include "ethertype.h"
43#include "extract.h" /* must come after interface.h */
44#include "appletalk.h"
45
46static struct tok type2str[] = {
47 { ddpRTMP, "rtmp" },
48 { ddpRTMPrequest, "rtmpReq" },
49 { ddpECHO, "echo" },
50 { ddpIP, "IP" },
51 { ddpARP, "ARP" },
52 { ddpKLAP, "KLAP" },
53 { 0, NULL }
54};
55
56struct aarp {
57 u_int16_t htype, ptype;
58 u_int8_t halen, palen;
59 u_int16_t op;
60 u_int8_t hsaddr[6];
61 u_int8_t psaddr[4];
62 u_int8_t hdaddr[6];
63 u_int8_t pdaddr[4];
64};
65
66static char tstr[] = "[|atalk]";
67
68static void atp_print(const struct atATP *, u_int);
69static void atp_bitmap_print(u_char);
70static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char);
71static const char *print_cstring(const char *, const u_char *);
72static const struct atNBPtuple *nbp_tuple_print(const struct atNBPtuple *,
73 const u_char *,
74 u_short, u_char, u_char);
75static const struct atNBPtuple *nbp_name_print(const struct atNBPtuple *,
76 const u_char *);
77static const char *ataddr_string(u_short, u_char);
78static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char);
79static const char *ddpskt_string(int);
80
81/*
82 * Print LLAP packets received on a physical LocalTalk interface.
83 */
84u_int
85ltalk_if_print(const struct pcap_pkthdr *h, const u_char *p)
86{
87 return (llap_print(p, h->caplen));
88}
89
90/*
91 * Print AppleTalk LLAP packets.
92 */
93u_int
94llap_print(register const u_char *bp, u_int length)
95{
96 register const struct LAP *lp;
97 register const struct atDDP *dp;
98 register const struct atShortDDP *sdp;
99 u_short snet;
100 u_int hdrlen;
101
102 /*
103 * Our packet is on a 4-byte boundary, as we're either called
104 * directly from a top-level link-layer printer (ltalk_if_print)
105 * or from the UDP printer. The LLAP+DDP header is a multiple
106 * of 4 bytes in length, so the DDP payload is also on a 4-byte
107 * boundary, and we don't need to align it before calling
108 * "ddp_print()".
109 */
110 lp = (const struct LAP *)bp;
111 bp += sizeof(*lp);
112 length -= sizeof(*lp);
113 hdrlen = sizeof(*lp);
114 switch (lp->type) {
115
116 case lapShortDDP:
117 if (length < ddpSSize) {
118 (void)printf(" [|sddp %d]", length);
119 return (length);
120 }
121 sdp = (const struct atShortDDP *)bp;
122 printf("%s.%s",
123 ataddr_string(0, lp->src), ddpskt_string(sdp->srcSkt));
124 printf(" > %s.%s:",
125 ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt));
126 bp += ddpSSize;
127 length -= ddpSSize;
128 hdrlen += ddpSSize;
129 ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
130 break;
131
132 case lapDDP:
133 if (length < ddpSize) {
134 (void)printf(" [|ddp %d]", length);
135 return (length);
136 }
137 dp = (const struct atDDP *)bp;
138 snet = EXTRACT_16BITS(&dp->srcNet);
139 printf("%s.%s", ataddr_string(snet, dp->srcNode),
140 ddpskt_string(dp->srcSkt));
141 printf(" > %s.%s:",
142 ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
143 ddpskt_string(dp->dstSkt));
144 bp += ddpSize;
145 length -= ddpSize;
146 hdrlen += ddpSize;
147 ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
148 break;
149
150#ifdef notdef
151 case lapKLAP:
152 klap_print(bp, length);
153 break;
154#endif
155
156 default:
157 printf("%d > %d at-lap#%d %d",
158 lp->src, lp->dst, lp->type, length);
159 break;
160 }
161 return (hdrlen);
162}
163
164/*
165 * Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
166 * when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
167 * packets in them).
168 */
169void
170atalk_print(register const u_char *bp, u_int length)
171{
172 register const struct atDDP *dp;
173 u_short snet;
174
175 if(!eflag)
176 printf("AT ");
177
178 if (length < ddpSize) {
179 (void)printf(" [|ddp %d]", length);
180 return;
181 }
182 dp = (const struct atDDP *)bp;
183 snet = EXTRACT_16BITS(&dp->srcNet);
184 printf("%s.%s", ataddr_string(snet, dp->srcNode),
185 ddpskt_string(dp->srcSkt));
186 printf(" > %s.%s: ",
187 ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
188 ddpskt_string(dp->dstSkt));
189 bp += ddpSize;
190 length -= ddpSize;
191 ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
192}
193
194/* XXX should probably pass in the snap header and do checks like arp_print() */
195void
196aarp_print(register const u_char *bp, u_int length)
197{
198 register const struct aarp *ap;
199
200#define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])
201
202 printf("aarp ");
203 ap = (const struct aarp *)bp;
204 if (EXTRACT_16BITS(&ap->htype) == 1 &&
205 EXTRACT_16BITS(&ap->ptype) == ETHERTYPE_ATALK &&
206 ap->halen == 6 && ap->palen == 4 )
207 switch (EXTRACT_16BITS(&ap->op)) {
208
209 case 1: /* request */
210 (void)printf("who-has %s tell %s",
211 AT(pdaddr), AT(psaddr));
212 return;
213
214 case 2: /* response */
215 (void)printf("reply %s is-at %s",
216 AT(pdaddr), etheraddr_string(ap->hdaddr));
217 return;
218
219 case 3: /* probe (oy!) */
220 (void)printf("probe %s tell %s",
221 AT(pdaddr), AT(psaddr));
222 return;
223 }
224 (void)printf("len %u op %u htype %u ptype %#x halen %u palen %u",
225 length, EXTRACT_16BITS(&ap->op), EXTRACT_16BITS(&ap->htype),
226 EXTRACT_16BITS(&ap->ptype), ap->halen, ap->palen);
227}
228
229/*
230 * Print AppleTalk Datagram Delivery Protocol packets.
231 */
232static void
233ddp_print(register const u_char *bp, register u_int length, register int t,
234 register u_short snet, register u_char snode, u_char skt)
235{
236
237 switch (t) {
238
239 case ddpNBP:
240 nbp_print((const struct atNBP *)bp, length, snet, snode, skt);
241 break;
242
243 case ddpATP:
244 atp_print((const struct atATP *)bp, length);
245 break;
246
247 case ddpEIGRP:
248 eigrp_print(bp, length);
249 break;
250
251 default:
252 (void)printf(" at-%s %d", tok2str(type2str, NULL, t), length);
253 break;
254 }
255}
256
257static void
258atp_print(register const struct atATP *ap, u_int length)
259{
260 char c;
261 u_int32_t data;
262
263 if ((const u_char *)(ap + 1) > snapend) {
264 /* Just bail if we don't have the whole chunk. */
265 fputs(tstr, stdout);
266 return;
267 }
268 length -= sizeof(*ap);
269 switch (ap->control & 0xc0) {
270
271 case atpReqCode:
272 (void)printf(" atp-req%s %d",
273 ap->control & atpXO? " " : "*",
274 EXTRACT_16BITS(&ap->transID));
275
276 atp_bitmap_print(ap->bitmap);
277
278 if (length != 0)
279 (void)printf(" [len=%d]", length);
280
281 switch (ap->control & (atpEOM|atpSTS)) {
282 case atpEOM:
283 (void)printf(" [EOM]");
284 break;
285 case atpSTS:
286 (void)printf(" [STS]");
287 break;
288 case atpEOM|atpSTS:
289 (void)printf(" [EOM,STS]");
290 break;
291 }
292 break;
293
294 case atpRspCode:
295 (void)printf(" atp-resp%s%d:%d (%d)",
296 ap->control & atpEOM? "*" : " ",
297 EXTRACT_16BITS(&ap->transID), ap->bitmap, length);
298 switch (ap->control & (atpXO|atpSTS)) {
299 case atpXO:
300 (void)printf(" [XO]");
301 break;
302 case atpSTS:
303 (void)printf(" [STS]");
304 break;
305 case atpXO|atpSTS:
306 (void)printf(" [XO,STS]");
307 break;
308 }
309 break;
310
311 case atpRelCode:
312 (void)printf(" atp-rel %d", EXTRACT_16BITS(&ap->transID));
313
314 atp_bitmap_print(ap->bitmap);
315
316 /* length should be zero */
317 if (length)
318 (void)printf(" [len=%d]", length);
319
320 /* there shouldn't be any control flags */
321 if (ap->control & (atpXO|atpEOM|atpSTS)) {
322 c = '[';
323 if (ap->control & atpXO) {
324 (void)printf("%cXO", c);
325 c = ',';
326 }
327 if (ap->control & atpEOM) {
328 (void)printf("%cEOM", c);
329 c = ',';
330 }
331 if (ap->control & atpSTS) {
332 (void)printf("%cSTS", c);
333 c = ',';
334 }
335 (void)printf("]");
336 }
337 break;
338
339 default:
340 (void)printf(" atp-0x%x %d (%d)", ap->control,
341 EXTRACT_16BITS(&ap->transID), length);
342 break;
343 }
344 data = EXTRACT_32BITS(&ap->userData);
345 if (data != 0)
346 (void)printf(" 0x%x", data);
347}
348
349static void
350atp_bitmap_print(register u_char bm)
351{
352 register char c;
353 register int i;
354
355 /*
356 * The '& 0xff' below is needed for compilers that want to sign
357 * extend a u_char, which is the case with the Ultrix compiler.
358 * (gcc is smart enough to eliminate it, at least on the Sparc).
359 */
360 if ((bm + 1) & (bm & 0xff)) {
361 c = '<';
362 for (i = 0; bm; ++i) {
363 if (bm & 1) {
364 (void)printf("%c%d", c, i);
365 c = ',';
366 }
367 bm >>= 1;
368 }
369 (void)printf(">");
370 } else {
371 for (i = 0; bm; ++i)
372 bm >>= 1;
373 if (i > 1)
374 (void)printf("<0-%d>", i - 1);
375 else
376 (void)printf("<0>");
377 }
378}
379
380static void
381nbp_print(register const struct atNBP *np, u_int length, register u_short snet,
382 register u_char snode, register u_char skt)
383{
384 register const struct atNBPtuple *tp =
385 (const struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
386 int i;
387 const u_char *ep;
388
389 if (length < nbpHeaderSize) {
390 (void)printf(" truncated-nbp %d", length);
391 return;
392 }
393
394 length -= nbpHeaderSize;
395 if (length < 8) {
396 /* must be room for at least one tuple */
397 (void)printf(" truncated-nbp %d", length + nbpHeaderSize);
398 return;
399 }
400 /* ep points to end of available data */
401 ep = snapend;
402 if ((const u_char *)tp > ep) {
403 fputs(tstr, stdout);
404 return;
405 }
406 switch (i = np->control & 0xf0) {
407
408 case nbpBrRq:
409 case nbpLkUp:
410 (void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
411 np->id);
412 if ((const u_char *)(tp + 1) > ep) {
413 fputs(tstr, stdout);
414 return;
415 }
416 (void)nbp_name_print(tp, ep);
417 /*
418 * look for anomalies: the spec says there can only
419 * be one tuple, the address must match the source
420 * address and the enumerator should be zero.
421 */
422 if ((np->control & 0xf) != 1)
423 (void)printf(" [ntup=%d]", np->control & 0xf);
424 if (tp->enumerator)
425 (void)printf(" [enum=%d]", tp->enumerator);
426 if (EXTRACT_16BITS(&tp->net) != snet ||
427 tp->node != snode || tp->skt != skt)
428 (void)printf(" [addr=%s.%d]",
429 ataddr_string(EXTRACT_16BITS(&tp->net),
430 tp->node), tp->skt);
431 break;
432
433 case nbpLkUpReply:
434 (void)printf(" nbp-reply %d:", np->id);
435
436 /* print each of the tuples in the reply */
437 for (i = np->control & 0xf; --i >= 0 && tp; )
438 tp = nbp_tuple_print(tp, ep, snet, snode, skt);
439 break;
440
441 default:
442 (void)printf(" nbp-0x%x %d (%d)", np->control, np->id,
443 length);
444 break;
445 }
446}
447
448/* print a counted string */
449static const char *
450print_cstring(register const char *cp, register const u_char *ep)
451{
452 register u_int length;
453
454 if (cp >= (const char *)ep) {
455 fputs(tstr, stdout);
456 return (0);
457 }
458 length = *cp++;
459
460 /* Spec says string can be at most 32 bytes long */
461 if (length > 32) {
462 (void)printf("[len=%u]", length);
463 return (0);
464 }
465 while ((int)--length >= 0) {
466 if (cp >= (const char *)ep) {
467 fputs(tstr, stdout);
468 return (0);
469 }
470 putchar(*cp++);
471 }
472 return (cp);
473}
474
475static const struct atNBPtuple *
476nbp_tuple_print(register const struct atNBPtuple *tp,
477 register const u_char *ep,
478 register u_short snet, register u_char snode,
479 register u_char skt)
480{
481 register const struct atNBPtuple *tpn;
482
483 if ((const u_char *)(tp + 1) > ep) {
484 fputs(tstr, stdout);
485 return 0;
486 }
487 tpn = nbp_name_print(tp, ep);
488
489 /* if the enumerator isn't 1, print it */
490 if (tp->enumerator != 1)
491 (void)printf("(%d)", tp->enumerator);
492
493 /* if the socket doesn't match the src socket, print it */
494 if (tp->skt != skt)
495 (void)printf(" %d", tp->skt);
496
497 /* if the address doesn't match the src address, it's an anomaly */
498 if (EXTRACT_16BITS(&tp->net) != snet || tp->node != snode)
499 (void)printf(" [addr=%s]",
500 ataddr_string(EXTRACT_16BITS(&tp->net), tp->node));
501
502 return (tpn);
503}
504
505static const struct atNBPtuple *
506nbp_name_print(const struct atNBPtuple *tp, register const u_char *ep)
507{
508 register const char *cp = (const char *)tp + nbpTupleSize;
509
510 putchar(' ');
511
512 /* Object */
513 putchar('"');
514 if ((cp = print_cstring(cp, ep)) != NULL) {
515 /* Type */
516 putchar(':');
517 if ((cp = print_cstring(cp, ep)) != NULL) {
518 /* Zone */
519 putchar('@');
520 if ((cp = print_cstring(cp, ep)) != NULL)
521 putchar('"');
522 }
523 }
524 return ((const struct atNBPtuple *)cp);
525}
526
527
528#define HASHNAMESIZE 4096
529
530struct hnamemem {
531 int addr;
532 char *name;
533 struct hnamemem *nxt;
534};
535
536static struct hnamemem hnametable[HASHNAMESIZE];
537
538static const char *
539ataddr_string(u_short atnet, u_char athost)
540{
541 register struct hnamemem *tp, *tp2;
542 register int i = (atnet << 8) | athost;
543 char nambuf[MAXHOSTNAMELEN + 20];
544 static int first = 1;
545 FILE *fp;
546
547 /*
548 * if this is the first call, see if there's an AppleTalk
549 * number to name map file.
550 */
551 if (first && (first = 0, !nflag)
552 && (fp = fopen("/etc/atalk.names", "r"))) {
553 char line[256];
554 int i1, i2, i3;
555
556 while (fgets(line, sizeof(line), fp)) {
557 if (line[0] == '\n' || line[0] == 0 || line[0] == '#')
558 continue;
559 if (sscanf(line, "%d.%d.%d %256s", &i1, &i2, &i3,
560 nambuf) == 4)
561 /* got a hostname. */
562 i3 |= ((i1 << 8) | i2) << 8;
563 else if (sscanf(line, "%d.%d %256s", &i1, &i2,
564 nambuf) == 3)
565 /* got a net name */
566 i3 = (((i1 << 8) | i2) << 8) | 255;
567 else
568 continue;
569
570 for (tp = &hnametable[i3 & (HASHNAMESIZE-1)];
571 tp->nxt; tp = tp->nxt)
572 ;
573 tp->addr = i3;
574 tp->nxt = newhnamemem();
575 tp->name = strdup(nambuf);
576 }
577 fclose(fp);
578 }
579
580 for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
581 if (tp->addr == i)
582 return (tp->name);
583
584 /* didn't have the node name -- see if we've got the net name */
585 i |= 255;
586 for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
587 if (tp2->addr == i) {
588 tp->addr = (atnet << 8) | athost;
589 tp->nxt = newhnamemem();
590 (void)snprintf(nambuf, sizeof(nambuf), "%s.%d",
591 tp2->name, athost);
592 tp->name = strdup(nambuf);
593 return (tp->name);
594 }
595
596 tp->addr = (atnet << 8) | athost;
597 tp->nxt = newhnamemem();
598 if (athost != 255)
599 (void)snprintf(nambuf, sizeof(nambuf), "%d.%d.%d",
600 atnet >> 8, atnet & 0xff, athost);
601 else
602 (void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet >> 8,
603 atnet & 0xff);
604 tp->name = strdup(nambuf);
605
606 return (tp->name);
607}
608
609static struct tok skt2str[] = {
610 { rtmpSkt, "rtmp" }, /* routing table maintenance */
611 { nbpSkt, "nis" }, /* name info socket */
612 { echoSkt, "echo" }, /* AppleTalk echo protocol */
613 { zipSkt, "zip" }, /* zone info protocol */
614 { 0, NULL }
615};
616
617static const char *
618ddpskt_string(register int skt)
619{
620 static char buf[8];
621
622 if (nflag) {
623 (void)snprintf(buf, sizeof(buf), "%d", skt);
624 return (buf);
625 }
626 return (tok2str(skt2str, "%d", skt));
627}