GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.sbin/tcpdump/print-atalk.c Lines: 0 247 0.0 %
Date: 2017-11-13 Branches: 0 152 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: print-atalk.c,v 1.33 2017/08/30 09:23:00 otto Exp $	*/
2
3
/*
4
 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
5
 *	The Regents of the University of California.  All rights reserved.
6
 *
7
 * Redistribution and use in source and binary forms, with or without
8
 * modification, are permitted provided that: (1) source code distributions
9
 * retain the above copyright notice and this paragraph in its entirety, (2)
10
 * distributions including binary code include the above copyright notice and
11
 * this paragraph in its entirety in the documentation or other materials
12
 * provided with the distribution, and (3) all advertising materials mentioning
13
 * features or use of this software display the following acknowledgement:
14
 * ``This product includes software developed by the University of California,
15
 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
16
 * the University nor the names of its contributors may be used to endorse
17
 * or promote products derived from this software without specific prior
18
 * written permission.
19
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22
 *
23
 * Format and print AppleTalk packets.
24
 */
25
26
#include <sys/time.h>
27
#include <sys/socket.h>
28
29
struct mbuf;
30
struct rtentry;
31
#include <net/if.h>
32
33
#include <netinet/in.h>
34
#include <netinet/ip.h>
35
#include <netinet/ip_var.h>
36
#include <netinet/if_ether.h>
37
#include <netinet/udp.h>
38
#include <netinet/udp_var.h>
39
#include <netinet/tcp.h>
40
41
#include <inttypes.h>
42
#include <stdio.h>
43
#include <stdlib.h>
44
#include <string.h>
45
#include <limits.h>
46
47
#include "interface.h"
48
#include "addrtoname.h"
49
#include "ethertype.h"
50
#include "extract.h"			/* must come after interface.h */
51
#include "appletalk.h"
52
#include "savestr.h"
53
#include "privsep.h"
54
55
static struct tok type2str[] = {
56
	{ ddpRTMP,		"rtmp" },
57
	{ ddpRTMPrequest,	"rtmpReq" },
58
	{ ddpECHO,		"echo" },
59
	{ ddpIP,		"IP" },
60
	{ ddpARP,		"ARP" },
61
	{ ddpKLAP,		"KLAP" },
62
	{ 0,			NULL }
63
};
64
65
struct aarp {
66
	u_int16_t	htype, ptype;
67
	u_int8_t	halen, palen;
68
	u_int16_t	op;
69
	u_int8_t	hsaddr[6];
70
	u_int8_t	psaddr[4];
71
	u_int8_t	hdaddr[6];
72
	u_int8_t	pdaddr[4];
73
};
74
75
static char tstr[] = "[|atalk]";
76
77
static void atp_print(const struct atATP *, u_int);
78
static void atp_bitmap_print(u_char);
79
static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char);
80
static const char *print_cstring(const char *, const u_char *);
81
static const struct atNBPtuple *nbp_tuple_print(const struct atNBPtuple *,
82
						const u_char *,
83
						u_short, u_char, u_char);
84
static const struct atNBPtuple *nbp_name_print(const struct atNBPtuple *,
85
					       const u_char *);
86
static const char *ataddr_string(u_short, u_char);
87
static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char);
88
static const char *ddpskt_string(int);
89
90
/*
91
 * Print AppleTalk Datagram Delivery Protocol packets
92
 * without the LLAP encapsulating header (i.e.
93
 * from Ethertalk)
94
 */
95
void
96
atalk_print(const u_char *bp, u_int length)
97
{
98
	const struct atDDP *dp;
99
	u_short snet;
100
101
	if (length < ddpSize) {
102
		(void)printf(" [|ddp %d]", length);
103
		return;
104
	}
105
	dp = (const struct atDDP *)bp;
106
	snet = EXTRACT_16BITS(&dp->srcNet);
107
	printf("%s.%s", ataddr_string(snet, dp->srcNode),
108
	    ddpskt_string(dp->srcSkt));
109
	printf(" > %s.%s:",
110
	    ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
111
	    ddpskt_string(dp->dstSkt));
112
	bp += ddpSize;
113
	length -= ddpSize;
114
	ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
115
}
116
117
/*
118
 * Print AppleTalk Datagram Delivery Protocol packets
119
 * from localtalk (i.e. the 230 Kbps net built into
120
 * every Macintosh). We can get these from a localtalk
121
 * interface if we have one, or from UDP encapsulated tunnels.
122
 */
123
void
124
atalk_print_llap(const u_char *bp, u_int length)
125
{
126
	const struct LAP *lp;
127
	const struct atDDP *dp;
128
	const struct atShortDDP *sdp;
129
	u_short snet;
130
131
	if (length < sizeof(*lp)) {
132
		(void)printf(" [|llap %d]", length);
133
		return;
134
	}
135
136
	lp = (struct LAP *)bp;
137
	bp += sizeof(*lp);
138
	length -= sizeof(*lp);
139
	switch (lp->type) {
140
141
	case lapShortDDP:
142
		if (length < ddpSSize) {
143
			(void)printf(" [|sddp %d]", length);
144
			return;
145
		}
146
		sdp = (const struct atShortDDP *)bp;
147
		printf("%s.%s",
148
		    ataddr_string(0, lp->src), ddpskt_string(sdp->srcSkt));
149
		printf(" > %s.%s:",
150
		    ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt));
151
		bp += ddpSSize;
152
		length -= ddpSSize;
153
		ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
154
		break;
155
156
	case lapDDP:
157
		if (length < ddpSize) {
158
			(void)printf(" [|ddp %d]", length);
159
			return;
160
		}
161
		dp = (const struct atDDP *)bp;
162
		snet = EXTRACT_16BITS(&dp->srcNet);
163
		printf("%s.%s", ataddr_string(snet, dp->srcNode),
164
		    ddpskt_string(dp->srcSkt));
165
		printf(" > %s.%s:",
166
		    ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
167
		    ddpskt_string(dp->dstSkt));
168
		bp += ddpSize;
169
		length -= ddpSize;
170
		ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
171
		break;
172
173
#ifdef notdef
174
	case lapKLAP:
175
		klap_print(bp, length);
176
		break;
177
#endif
178
179
	default:
180
		printf("%d > %d at-lap#%d %d",
181
		    lp->src, lp->dst, lp->type, length);
182
		break;
183
	}
184
}
185
186
/* XXX should probably pass in the snap header and do checks like arp_print() */
187
void
188
aarp_print(const u_char *bp, u_int length)
189
{
190
	const struct aarp *ap;
191
192
#define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])
193
194
	printf("aarp ");
195
	ap = (const struct aarp *)bp;
196
	if (ntohs(ap->htype) == 1 && ntohs(ap->ptype) == ETHERTYPE_ATALK &&
197
	    ap->halen == 6 && ap->palen == 4 )
198
		switch (ntohs(ap->op)) {
199
200
		case 1:				/* request */
201
			(void)printf("who-has %s tell %s",
202
			    AT(pdaddr), AT(psaddr));
203
			return;
204
205
		case 2:				/* response */
206
			(void)printf("reply %s is-at %s",
207
			    AT(pdaddr), etheraddr_string(ap->hdaddr));
208
			return;
209
210
		case 3:				/* probe (oy!) */
211
			(void)printf("probe %s tell %s",
212
			    AT(pdaddr), AT(psaddr));
213
			return;
214
		}
215
	(void)printf("len %u op %u htype %u ptype %#x halen %u palen %u",
216
	    length, ntohs(ap->op), ntohs(ap->htype), ntohs(ap->ptype),
217
	    ap->halen, ap->palen);
218
}
219
220
static void
221
ddp_print(const u_char *bp, u_int length, int t,
222
	  u_short snet, u_char snode, u_char skt)
223
{
224
225
	if ((intptr_t)bp & (sizeof(long)-1)) {
226
		static u_char *abuf = NULL;
227
		int clen = snapend - bp;
228
		if (clen > snaplen)
229
			clen = snaplen;
230
231
		if (abuf == NULL) {
232
			abuf = malloc(snaplen);
233
			if (abuf == NULL)
234
				error("ddp_print: malloc");
235
		}
236
		memmove((char *)abuf, (char *)bp, min(length, clen));
237
		snapend = abuf + clen;
238
		packetp = abuf;
239
		bp = abuf;
240
	}
241
242
	switch (t) {
243
244
	case ddpNBP:
245
		nbp_print((const struct atNBP *)bp, length, snet, snode, skt);
246
		break;
247
248
	case ddpATP:
249
		atp_print((const struct atATP *)bp, length);
250
		break;
251
252
	default:
253
		(void)printf(" at-%s %d", tok2str(type2str, NULL, t), length);
254
		break;
255
	}
256
}
257
258
static void
259
atp_print(const struct atATP *ap, u_int length)
260
{
261
	char c;
262
	u_int32_t data;
263
264
	if ((const u_char *)(ap + 1) > snapend) {
265
		/* Just bail if we don't have the whole chunk. */
266
		fputs(tstr, stdout);
267
		return;
268
	}
269
	length -= sizeof(*ap);
270
	switch (ap->control & 0xc0) {
271
272
	case atpReqCode:
273
		(void)printf(" atp-req%s %d",
274
			     ap->control & atpXO? " " : "*",
275
			     EXTRACT_16BITS(&ap->transID));
276
277
		atp_bitmap_print(ap->bitmap);
278
279
		if (length != 0)
280
			(void)printf(" [len=%d]", length);
281
282
		switch (ap->control & (atpEOM|atpSTS)) {
283
		case atpEOM:
284
			(void)printf(" [EOM]");
285
			break;
286
		case atpSTS:
287
			(void)printf(" [STS]");
288
			break;
289
		case atpEOM|atpSTS:
290
			(void)printf(" [EOM,STS]");
291
			break;
292
		}
293
		break;
294
295
	case atpRspCode:
296
		(void)printf(" atp-resp%s%d:%d (%d)",
297
			     ap->control & atpEOM? "*" : " ",
298
			     EXTRACT_16BITS(&ap->transID), ap->bitmap, length);
299
		switch (ap->control & (atpXO|atpSTS)) {
300
		case atpXO:
301
			(void)printf(" [XO]");
302
			break;
303
		case atpSTS:
304
			(void)printf(" [STS]");
305
			break;
306
		case atpXO|atpSTS:
307
			(void)printf(" [XO,STS]");
308
			break;
309
		}
310
		break;
311
312
	case atpRelCode:
313
		(void)printf(" atp-rel  %d", EXTRACT_16BITS(&ap->transID));
314
315
		atp_bitmap_print(ap->bitmap);
316
317
		/* length should be zero */
318
		if (length)
319
			(void)printf(" [len=%d]", length);
320
321
		/* there shouldn't be any control flags */
322
		if (ap->control & (atpXO|atpEOM|atpSTS)) {
323
			c = '[';
324
			if (ap->control & atpXO) {
325
				(void)printf("%cXO", c);
326
				c = ',';
327
			}
328
			if (ap->control & atpEOM) {
329
				(void)printf("%cEOM", c);
330
				c = ',';
331
			}
332
			if (ap->control & atpSTS) {
333
				(void)printf("%cSTS", c);
334
				c = ',';
335
			}
336
			(void)printf("]");
337
		}
338
		break;
339
340
	default:
341
		(void)printf(" atp-0x%x  %d (%d)", ap->control,
342
			     EXTRACT_16BITS(&ap->transID), length);
343
		break;
344
	}
345
	data = EXTRACT_32BITS(&ap->userData);
346
	if (data != 0)
347
		(void)printf(" 0x%x", data);
348
}
349
350
static void
351
atp_bitmap_print(u_char bm)
352
{
353
	char c;
354
	int i;
355
356
	/*
357
	 * The '& 0xff' below is needed for compilers that want to sign
358
	 * extend a u_char, which is the case with the Ultrix compiler.
359
	 * (gcc is smart enough to eliminate it, at least on the Sparc).
360
	 */
361
	if ((bm + 1) & (bm & 0xff)) {
362
		c = '<';
363
		for (i = 0; bm; ++i) {
364
			if (bm & 1) {
365
				(void)printf("%c%d", c, i);
366
				c = ',';
367
			}
368
			bm >>= 1;
369
		}
370
		(void)printf(">");
371
	} else {
372
		for (i = 0; bm; ++i)
373
			bm >>= 1;
374
		if (i > 1)
375
			(void)printf("<0-%d>", i - 1);
376
		else
377
			(void)printf("<0>");
378
	}
379
}
380
381
static void
382
nbp_print(const struct atNBP *np, u_int length, u_short snet,
383
	  u_char snode, u_char skt)
384
{
385
	const struct atNBPtuple *tp =
386
			(struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
387
	int i;
388
	const u_char *ep;
389
390
	if (length < nbpHeaderSize) {
391
		(void)printf(" truncated-nbp %d", length);
392
		return;
393
	}
394
395
	length -= nbpHeaderSize;
396
	if (length < 8) {
397
		/* must be room for at least one tuple */
398
		if (np->control == nbpNATLKerr) {
399
			(void)printf(" nbp-netatalk_err");
400
			return;
401
		} else if (np->control == nbpNATLKok) {
402
			(void)printf(" nbp-netatalk_ok");
403
			return;
404
		}
405
		(void)printf(" truncated-nbp nbp-0x%x  %d (%d)",
406
			np->control, np->id, length + nbpHeaderSize);
407
		return;
408
	}
409
	/* ep points to end of available data */
410
	ep = snapend;
411
	if ((const u_char *)tp > ep) {
412
		fputs(tstr, stdout);
413
		return;
414
	}
415
	switch (i = np->control & 0xf0) {
416
417
	case nbpBrRq:
418
	case nbpLkUp:
419
		(void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
420
			     np->id);
421
		if ((const u_char *)(tp + 1) > ep) {
422
			fputs(tstr, stdout);
423
			return;
424
		}
425
		(void)nbp_name_print(tp, ep);
426
		/*
427
		 * look for anomalies: the spec says there can only
428
		 * be one tuple, the address must match the source
429
		 * address and the enumerator should be zero.
430
		 */
431
		if ((np->control & 0xf) != 1)
432
			(void)printf(" [ntup=%d]", np->control & 0xf);
433
		if (tp->enumerator)
434
			(void)printf(" [enum=%d]", tp->enumerator);
435
		if (EXTRACT_16BITS(&tp->net) != snet ||
436
		    tp->node != snode || tp->skt != skt)
437
			(void)printf(" [addr=%s.%d]",
438
			    ataddr_string(EXTRACT_16BITS(&tp->net),
439
			    tp->node), tp->skt);
440
		break;
441
442
	case nbpLkUpReply:
443
		(void)printf(" nbp-reply %d:", np->id);
444
445
		/* print each of the tuples in the reply */
446
		for (i = np->control & 0xf; --i >= 0 && tp; )
447
			tp = nbp_tuple_print(tp, ep, snet, snode, skt);
448
		break;
449
450
	case nbpNATLKrgstr:
451
	case nbpNATLKunrgstr:
452
		(void)printf((i == nbpNATLKrgstr) ?
453
			" nbp-netatalk_rgstr %d:" :
454
			" nbp-netatalk_unrgstr %d:",
455
			np->id);
456
		for (i = np->control & 0xf; --i >= 0 && tp; )
457
			tp = nbp_tuple_print(tp, ep, snet, snode, skt);
458
		break;
459
460
	default:
461
		(void)printf(" nbp-0x%x  %d (%d)", np->control, np->id,
462
				length);
463
		break;
464
	}
465
}
466
467
/* print a counted string */
468
static const char *
469
print_cstring(const char *cp, const u_char *ep)
470
{
471
	u_int length;
472
473
	if (cp >= (const char *)ep) {
474
		fputs(tstr, stdout);
475
		return (0);
476
	}
477
	length = *cp++;
478
479
	/* Spec says string can be at most 32 bytes long */
480
	if (length > 32) {
481
		(void)printf("[len=%d]", length);
482
		return (0);
483
	}
484
	while ((int)--length >= 0) {
485
		if (cp >= (char *)ep) {
486
			fputs(tstr, stdout);
487
			return (0);
488
		}
489
		putchar(*cp++);
490
	}
491
	return (cp);
492
}
493
494
static const struct atNBPtuple *
495
nbp_tuple_print(const struct atNBPtuple *tp,
496
		const u_char *ep,
497
		u_short snet, u_char snode,
498
		u_char skt)
499
{
500
	const struct atNBPtuple *tpn;
501
502
	if ((const u_char *)(tp + 1) > ep) {
503
		fputs(tstr, stdout);
504
		return 0;
505
	}
506
	tpn = nbp_name_print(tp, ep);
507
508
	/* if the enumerator isn't 1, print it */
509
	if (tp->enumerator != 1)
510
		(void)printf("(%d)", tp->enumerator);
511
512
	/* if the socket doesn't match the src socket, print it */
513
	if (tp->skt != skt)
514
		(void)printf(" %d", tp->skt);
515
516
	/* if the address doesn't match the src address, it's an anomaly */
517
	if (EXTRACT_16BITS(&tp->net) != snet || tp->node != snode)
518
		(void)printf(" [addr=%s]",
519
		    ataddr_string(EXTRACT_16BITS(&tp->net), tp->node));
520
521
	return (tpn);
522
}
523
524
static const struct atNBPtuple *
525
nbp_name_print(const struct atNBPtuple *tp, const u_char *ep)
526
{
527
	const char *cp = (const char *)tp + nbpTupleSize;
528
529
	putchar(' ');
530
531
	/* Object */
532
	putchar('"');
533
	if ((cp = print_cstring(cp, ep)) != NULL) {
534
		/* Type */
535
		putchar(':');
536
		if ((cp = print_cstring(cp, ep)) != NULL) {
537
			/* Zone */
538
			putchar('@');
539
			if ((cp = print_cstring(cp, ep)) != NULL)
540
				putchar('"');
541
		}
542
	}
543
	return ((const struct atNBPtuple *)cp);
544
}
545
546
547
#define HASHNAMESIZE 4096
548
549
struct hnamemem {
550
	int addr;
551
	char *name;
552
	struct hnamemem *nxt;
553
};
554
555
static struct hnamemem hnametable[HASHNAMESIZE];
556
557
static const char *
558
ataddr_string(u_short atnet, u_char athost)
559
{
560
	struct hnamemem *tp, *tp2;
561
	int i = (atnet << 8) | athost;
562
	char nambuf[HOST_NAME_MAX+1 + 20];
563
564
	for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
565
		if (tp->addr == i)
566
			return (tp->name);
567
568
	/* didn't have the node name -- see if we've got the net name */
569
	i |= 255;
570
	for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
571
		if (tp2->addr == i) {
572
			tp->addr = (atnet << 8) | athost;
573
			tp->nxt = newhnamemem();
574
			(void)snprintf(nambuf, sizeof nambuf, "%s.%d",
575
			    tp2->name, athost);
576
			tp->name = savestr(nambuf);
577
			return (tp->name);
578
		}
579
580
	tp->addr = (atnet << 8) | athost;
581
	tp->nxt = newhnamemem();
582
	if (athost != 255)
583
		(void)snprintf(nambuf, sizeof nambuf, "%d.%d.%d",
584
			atnet >> 8, atnet & 0xff, athost);
585
	else
586
		(void)snprintf(nambuf, sizeof nambuf, "%d.%d",
587
			atnet >> 8, atnet & 0xff);
588
	tp->name = savestr(nambuf);
589
590
	return (tp->name);
591
}
592
593
static struct tok skt2str[] = {
594
	{ rtmpSkt,	"rtmp" },	/* routing table maintenance */
595
	{ nbpSkt,	"nis" },	/* name info socket */
596
	{ echoSkt,	"echo" },	/* AppleTalk echo protocol */
597
	{ zipSkt,	"zip" },	/* zone info protocol */
598
	{ 0,		NULL }
599
};
600
601
static const char *
602
ddpskt_string(int skt)
603
{
604
	static char buf[12];
605
606
	if (nflag) {
607
		(void)snprintf(buf, sizeof buf, "%d", skt);
608
		return (buf);
609
	}
610
	return (tok2str(skt2str, "%d", skt));
611
}