xref: /netbsd/external/bsd/tcpdump/dist/print-atalk.c (revision c767dfb8)
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 
22 /* \summary: AppleTalk printer */
23 
24 #include <sys/cdefs.h>
25 #ifndef lint
26 __RCSID("$NetBSD: print-atalk.c,v 1.7 2017/02/05 04:05:05 spz Exp $");
27 #endif
28 
29 #ifdef HAVE_CONFIG_H
30 #include "config.h"
31 #endif
32 
33 #include <netdissect-stdinc.h>
34 
35 #include <stdio.h>
36 #include <string.h>
37 
38 #include "netdissect.h"
39 #include "addrtoname.h"
40 #include "ethertype.h"
41 #include "extract.h"
42 #include "appletalk.h"
43 
44 static const char tstr[] = "[|atalk]";
45 
46 static const 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 
56 struct aarp {
57 	uint16_t	htype, ptype;
58 	uint8_t		halen, palen;
59 	uint16_t	op;
60 	uint8_t		hsaddr[6];
61 	uint8_t		psaddr[4];
62 	uint8_t		hdaddr[6];
63 	uint8_t		pdaddr[4];
64 };
65 
66 static void atp_print(netdissect_options *, const struct atATP *, u_int);
67 static void atp_bitmap_print(netdissect_options *, u_char);
68 static void nbp_print(netdissect_options *, const struct atNBP *, u_int, u_short, u_char, u_char);
69 static const struct atNBPtuple *nbp_tuple_print(netdissect_options *ndo, const struct atNBPtuple *,
70 						const u_char *,
71 						u_short, u_char, u_char);
72 static const struct atNBPtuple *nbp_name_print(netdissect_options *, const struct atNBPtuple *,
73 					       const u_char *);
74 static const char *ataddr_string(netdissect_options *, u_short, u_char);
75 static void ddp_print(netdissect_options *, const u_char *, u_int, int, u_short, u_char, u_char);
76 static const char *ddpskt_string(netdissect_options *, int);
77 
78 /*
79  * Print LLAP packets received on a physical LocalTalk interface.
80  */
81 u_int
ltalk_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)82 ltalk_if_print(netdissect_options *ndo,
83                const struct pcap_pkthdr *h, const u_char *p)
84 {
85 	u_int hdrlen;
86 
87 	hdrlen = llap_print(ndo, p, h->len);
88 	if (hdrlen == 0) {
89 		/* Cut short by the snapshot length. */
90 		return (h->caplen);
91 	}
92 	return (hdrlen);
93 }
94 
95 /*
96  * Print AppleTalk LLAP packets.
97  */
98 u_int
llap_print(netdissect_options * ndo,register const u_char * bp,u_int length)99 llap_print(netdissect_options *ndo,
100            register const u_char *bp, u_int length)
101 {
102 	register const struct LAP *lp;
103 	register const struct atDDP *dp;
104 	register const struct atShortDDP *sdp;
105 	u_short snet;
106 	u_int hdrlen;
107 
108 	if (length < sizeof(*lp)) {
109 		ND_PRINT((ndo, " [|llap %u]", length));
110 		return (length);
111 	}
112 	if (!ND_TTEST2(*bp, sizeof(*lp))) {
113 		ND_PRINT((ndo, " [|llap]"));
114 		return (0);	/* cut short by the snapshot length */
115 	}
116 	lp = (const struct LAP *)bp;
117 	bp += sizeof(*lp);
118 	length -= sizeof(*lp);
119 	hdrlen = sizeof(*lp);
120 	switch (lp->type) {
121 
122 	case lapShortDDP:
123 		if (length < ddpSSize) {
124 			ND_PRINT((ndo, " [|sddp %u]", length));
125 			return (length);
126 		}
127 		if (!ND_TTEST2(*bp, ddpSSize)) {
128 			ND_PRINT((ndo, " [|sddp]"));
129 			return (0);	/* cut short by the snapshot length */
130 		}
131 		sdp = (const struct atShortDDP *)bp;
132 		ND_PRINT((ndo, "%s.%s",
133 		    ataddr_string(ndo, 0, lp->src), ddpskt_string(ndo, sdp->srcSkt)));
134 		ND_PRINT((ndo, " > %s.%s:",
135 		    ataddr_string(ndo, 0, lp->dst), ddpskt_string(ndo, sdp->dstSkt)));
136 		bp += ddpSSize;
137 		length -= ddpSSize;
138 		hdrlen += ddpSSize;
139 		ddp_print(ndo, bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
140 		break;
141 
142 	case lapDDP:
143 		if (length < ddpSize) {
144 			ND_PRINT((ndo, " [|ddp %u]", length));
145 			return (length);
146 		}
147 		if (!ND_TTEST2(*bp, ddpSize)) {
148 			ND_PRINT((ndo, " [|ddp]"));
149 			return (0);	/* cut short by the snapshot length */
150 		}
151 		dp = (const struct atDDP *)bp;
152 		snet = EXTRACT_16BITS(&dp->srcNet);
153 		ND_PRINT((ndo, "%s.%s", ataddr_string(ndo, snet, dp->srcNode),
154 		    ddpskt_string(ndo, dp->srcSkt)));
155 		ND_PRINT((ndo, " > %s.%s:",
156 		    ataddr_string(ndo, EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
157 		    ddpskt_string(ndo, dp->dstSkt)));
158 		bp += ddpSize;
159 		length -= ddpSize;
160 		hdrlen += ddpSize;
161 		ddp_print(ndo, bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
162 		break;
163 
164 #ifdef notdef
165 	case lapKLAP:
166 		klap_print(bp, length);
167 		break;
168 #endif
169 
170 	default:
171 		ND_PRINT((ndo, "%d > %d at-lap#%d %u",
172 		    lp->src, lp->dst, lp->type, length));
173 		break;
174 	}
175 	return (hdrlen);
176 }
177 
178 /*
179  * Print EtherTalk/TokenTalk packets (or FDDITalk, or whatever it's called
180  * when it runs over FDDI; yes, I've seen FDDI captures with AppleTalk
181  * packets in them).
182  */
183 void
atalk_print(netdissect_options * ndo,register const u_char * bp,u_int length)184 atalk_print(netdissect_options *ndo,
185             register const u_char *bp, u_int length)
186 {
187 	register const struct atDDP *dp;
188 	u_short snet;
189 
190         if(!ndo->ndo_eflag)
191             ND_PRINT((ndo, "AT "));
192 
193 	if (length < ddpSize) {
194 		ND_PRINT((ndo, " [|ddp %u]", length));
195 		return;
196 	}
197 	if (!ND_TTEST2(*bp, ddpSize)) {
198 		ND_PRINT((ndo, " [|ddp]"));
199 		return;
200 	}
201 	dp = (const struct atDDP *)bp;
202 	snet = EXTRACT_16BITS(&dp->srcNet);
203 	ND_PRINT((ndo, "%s.%s", ataddr_string(ndo, snet, dp->srcNode),
204 	       ddpskt_string(ndo, dp->srcSkt)));
205 	ND_PRINT((ndo, " > %s.%s: ",
206 	       ataddr_string(ndo, EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
207 	       ddpskt_string(ndo, dp->dstSkt)));
208 	bp += ddpSize;
209 	length -= ddpSize;
210 	ddp_print(ndo, bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
211 }
212 
213 /* XXX should probably pass in the snap header and do checks like arp_print() */
214 void
aarp_print(netdissect_options * ndo,register const u_char * bp,u_int length)215 aarp_print(netdissect_options *ndo,
216            register const u_char *bp, u_int length)
217 {
218 	register const struct aarp *ap;
219 
220 #define AT(member) ataddr_string(ndo, (ap->member[1]<<8)|ap->member[2],ap->member[3])
221 
222 	ND_PRINT((ndo, "aarp "));
223 	ap = (const struct aarp *)bp;
224 	if (!ND_TTEST(*ap)) {
225 		/* Just bail if we don't have the whole chunk. */
226 		ND_PRINT((ndo, " [|aarp]"));
227 		return;
228 	}
229 	if (length < sizeof(*ap)) {
230 		ND_PRINT((ndo, " [|aarp %u]", length));
231 		return;
232 	}
233 	if (EXTRACT_16BITS(&ap->htype) == 1 &&
234 	    EXTRACT_16BITS(&ap->ptype) == ETHERTYPE_ATALK &&
235 	    ap->halen == 6 && ap->palen == 4 )
236 		switch (EXTRACT_16BITS(&ap->op)) {
237 
238 		case 1:				/* request */
239 			ND_PRINT((ndo, "who-has %s tell %s", AT(pdaddr), AT(psaddr)));
240 			return;
241 
242 		case 2:				/* response */
243 			ND_PRINT((ndo, "reply %s is-at %s", AT(psaddr), etheraddr_string(ndo, ap->hsaddr)));
244 			return;
245 
246 		case 3:				/* probe (oy!) */
247 			ND_PRINT((ndo, "probe %s tell %s", AT(pdaddr), AT(psaddr)));
248 			return;
249 		}
250 	ND_PRINT((ndo, "len %u op %u htype %u ptype %#x halen %u palen %u",
251 	    length, EXTRACT_16BITS(&ap->op), EXTRACT_16BITS(&ap->htype),
252 	    EXTRACT_16BITS(&ap->ptype), ap->halen, ap->palen));
253 }
254 
255 /*
256  * Print AppleTalk Datagram Delivery Protocol packets.
257  */
258 static void
ddp_print(netdissect_options * ndo,register const u_char * bp,register u_int length,register int t,register u_short snet,register u_char snode,u_char skt)259 ddp_print(netdissect_options *ndo,
260           register const u_char *bp, register u_int length, register int t,
261           register u_short snet, register u_char snode, u_char skt)
262 {
263 
264 	switch (t) {
265 
266 	case ddpNBP:
267 		nbp_print(ndo, (const struct atNBP *)bp, length, snet, snode, skt);
268 		break;
269 
270 	case ddpATP:
271 		atp_print(ndo, (const struct atATP *)bp, length);
272 		break;
273 
274 	case ddpEIGRP:
275 		eigrp_print(ndo, bp, length);
276 		break;
277 
278 	default:
279 		ND_PRINT((ndo, " at-%s %d", tok2str(type2str, NULL, t), length));
280 		break;
281 	}
282 }
283 
284 static void
atp_print(netdissect_options * ndo,register const struct atATP * ap,u_int length)285 atp_print(netdissect_options *ndo,
286           register const struct atATP *ap, u_int length)
287 {
288 	char c;
289 	uint32_t data;
290 
291 	if ((const u_char *)(ap + 1) > ndo->ndo_snapend) {
292 		/* Just bail if we don't have the whole chunk. */
293 		ND_PRINT((ndo, "%s", tstr));
294 		return;
295 	}
296 	if (length < sizeof(*ap)) {
297 		ND_PRINT((ndo, " [|atp %u]", length));
298 		return;
299 	}
300 	length -= sizeof(*ap);
301 	switch (ap->control & 0xc0) {
302 
303 	case atpReqCode:
304 		ND_PRINT((ndo, " atp-req%s %d",
305 			     ap->control & atpXO? " " : "*",
306 			     EXTRACT_16BITS(&ap->transID)));
307 
308 		atp_bitmap_print(ndo, ap->bitmap);
309 
310 		if (length != 0)
311 			ND_PRINT((ndo, " [len=%u]", length));
312 
313 		switch (ap->control & (atpEOM|atpSTS)) {
314 		case atpEOM:
315 			ND_PRINT((ndo, " [EOM]"));
316 			break;
317 		case atpSTS:
318 			ND_PRINT((ndo, " [STS]"));
319 			break;
320 		case atpEOM|atpSTS:
321 			ND_PRINT((ndo, " [EOM,STS]"));
322 			break;
323 		}
324 		break;
325 
326 	case atpRspCode:
327 		ND_PRINT((ndo, " atp-resp%s%d:%d (%u)",
328 			     ap->control & atpEOM? "*" : " ",
329 			     EXTRACT_16BITS(&ap->transID), ap->bitmap, length));
330 		switch (ap->control & (atpXO|atpSTS)) {
331 		case atpXO:
332 			ND_PRINT((ndo, " [XO]"));
333 			break;
334 		case atpSTS:
335 			ND_PRINT((ndo, " [STS]"));
336 			break;
337 		case atpXO|atpSTS:
338 			ND_PRINT((ndo, " [XO,STS]"));
339 			break;
340 		}
341 		break;
342 
343 	case atpRelCode:
344 		ND_PRINT((ndo, " atp-rel  %d", EXTRACT_16BITS(&ap->transID)));
345 
346 		atp_bitmap_print(ndo, ap->bitmap);
347 
348 		/* length should be zero */
349 		if (length)
350 			ND_PRINT((ndo, " [len=%u]", length));
351 
352 		/* there shouldn't be any control flags */
353 		if (ap->control & (atpXO|atpEOM|atpSTS)) {
354 			c = '[';
355 			if (ap->control & atpXO) {
356 				ND_PRINT((ndo, "%cXO", c));
357 				c = ',';
358 			}
359 			if (ap->control & atpEOM) {
360 				ND_PRINT((ndo, "%cEOM", c));
361 				c = ',';
362 			}
363 			if (ap->control & atpSTS) {
364 				ND_PRINT((ndo, "%cSTS", c));
365 				c = ',';
366 			}
367 			ND_PRINT((ndo, "]"));
368 		}
369 		break;
370 
371 	default:
372 		ND_PRINT((ndo, " atp-0x%x  %d (%u)", ap->control,
373 			     EXTRACT_16BITS(&ap->transID), length));
374 		break;
375 	}
376 	data = EXTRACT_32BITS(&ap->userData);
377 	if (data != 0)
378 		ND_PRINT((ndo, " 0x%x", data));
379 }
380 
381 static void
atp_bitmap_print(netdissect_options * ndo,register u_char bm)382 atp_bitmap_print(netdissect_options *ndo,
383                  register u_char bm)
384 {
385 	register char c;
386 	register int i;
387 
388 	/*
389 	 * The '& 0xff' below is needed for compilers that want to sign
390 	 * extend a u_char, which is the case with the Ultrix compiler.
391 	 * (gcc is smart enough to eliminate it, at least on the Sparc).
392 	 */
393 	if ((bm + 1) & (bm & 0xff)) {
394 		c = '<';
395 		for (i = 0; bm; ++i) {
396 			if (bm & 1) {
397 				ND_PRINT((ndo, "%c%d", c, i));
398 				c = ',';
399 			}
400 			bm >>= 1;
401 		}
402 		ND_PRINT((ndo, ">"));
403 	} else {
404 		for (i = 0; bm; ++i)
405 			bm >>= 1;
406 		if (i > 1)
407 			ND_PRINT((ndo, "<0-%d>", i - 1));
408 		else
409 			ND_PRINT((ndo, "<0>"));
410 	}
411 }
412 
413 static void
nbp_print(netdissect_options * ndo,register const struct atNBP * np,u_int length,register u_short snet,register u_char snode,register u_char skt)414 nbp_print(netdissect_options *ndo,
415           register const struct atNBP *np, u_int length, register u_short snet,
416           register u_char snode, register u_char skt)
417 {
418 	register const struct atNBPtuple *tp =
419 		(const struct atNBPtuple *)((const u_char *)np + nbpHeaderSize);
420 	int i;
421 	const u_char *ep;
422 
423 	if (length < nbpHeaderSize) {
424 		ND_PRINT((ndo, " truncated-nbp %u", length));
425 		return;
426 	}
427 
428 	length -= nbpHeaderSize;
429 	if (length < 8) {
430 		/* must be room for at least one tuple */
431 		ND_PRINT((ndo, " truncated-nbp %u", length + nbpHeaderSize));
432 		return;
433 	}
434 	/* ep points to end of available data */
435 	ep = ndo->ndo_snapend;
436 	if ((const u_char *)tp > ep) {
437 		ND_PRINT((ndo, "%s", tstr));
438 		return;
439 	}
440 	switch (i = np->control & 0xf0) {
441 
442 	case nbpBrRq:
443 	case nbpLkUp:
444 		ND_PRINT((ndo, i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:", np->id));
445 		if ((const u_char *)(tp + 1) > ep) {
446 			ND_PRINT((ndo, "%s", tstr));
447 			return;
448 		}
449 		(void)nbp_name_print(ndo, tp, ep);
450 		/*
451 		 * look for anomalies: the spec says there can only
452 		 * be one tuple, the address must match the source
453 		 * address and the enumerator should be zero.
454 		 */
455 		if ((np->control & 0xf) != 1)
456 			ND_PRINT((ndo, " [ntup=%d]", np->control & 0xf));
457 		if (tp->enumerator)
458 			ND_PRINT((ndo, " [enum=%d]", tp->enumerator));
459 		if (EXTRACT_16BITS(&tp->net) != snet ||
460 		    tp->node != snode || tp->skt != skt)
461 			ND_PRINT((ndo, " [addr=%s.%d]",
462 			    ataddr_string(ndo, EXTRACT_16BITS(&tp->net),
463 			    tp->node), tp->skt));
464 		break;
465 
466 	case nbpLkUpReply:
467 		ND_PRINT((ndo, " nbp-reply %d:", np->id));
468 
469 		/* print each of the tuples in the reply */
470 		for (i = np->control & 0xf; --i >= 0 && tp; )
471 			tp = nbp_tuple_print(ndo, tp, ep, snet, snode, skt);
472 		break;
473 
474 	default:
475 		ND_PRINT((ndo, " nbp-0x%x  %d (%u)", np->control, np->id, length));
476 		break;
477 	}
478 }
479 
480 /* print a counted string */
481 static const char *
print_cstring(netdissect_options * ndo,register const char * cp,register const u_char * ep)482 print_cstring(netdissect_options *ndo,
483               register const char *cp, register const u_char *ep)
484 {
485 	register u_int length;
486 
487 	if (cp >= (const char *)ep) {
488 		ND_PRINT((ndo, "%s", tstr));
489 		return (0);
490 	}
491 	length = *cp++;
492 
493 	/* Spec says string can be at most 32 bytes long */
494 	if (length > 32) {
495 		ND_PRINT((ndo, "[len=%u]", length));
496 		return (0);
497 	}
498 	while ((int)--length >= 0) {
499 		if (cp >= (const char *)ep) {
500 			ND_PRINT((ndo, "%s", tstr));
501 			return (0);
502 		}
503 		ND_PRINT((ndo, "%c", *cp++));
504 	}
505 	return (cp);
506 }
507 
508 static const struct atNBPtuple *
nbp_tuple_print(netdissect_options * ndo,register const struct atNBPtuple * tp,register const u_char * ep,register u_short snet,register u_char snode,register u_char skt)509 nbp_tuple_print(netdissect_options *ndo,
510                 register const struct atNBPtuple *tp, register const u_char *ep,
511                 register u_short snet, register u_char snode, register u_char skt)
512 {
513 	register const struct atNBPtuple *tpn;
514 
515 	if ((const u_char *)(tp + 1) > ep) {
516 		ND_PRINT((ndo, "%s", tstr));
517 		return 0;
518 	}
519 	tpn = nbp_name_print(ndo, tp, ep);
520 
521 	/* if the enumerator isn't 1, print it */
522 	if (tp->enumerator != 1)
523 		ND_PRINT((ndo, "(%d)", tp->enumerator));
524 
525 	/* if the socket doesn't match the src socket, print it */
526 	if (tp->skt != skt)
527 		ND_PRINT((ndo, " %d", tp->skt));
528 
529 	/* if the address doesn't match the src address, it's an anomaly */
530 	if (EXTRACT_16BITS(&tp->net) != snet || tp->node != snode)
531 		ND_PRINT((ndo, " [addr=%s]",
532 		    ataddr_string(ndo, EXTRACT_16BITS(&tp->net), tp->node)));
533 
534 	return (tpn);
535 }
536 
537 static const struct atNBPtuple *
nbp_name_print(netdissect_options * ndo,const struct atNBPtuple * tp,register const u_char * ep)538 nbp_name_print(netdissect_options *ndo,
539                const struct atNBPtuple *tp, register const u_char *ep)
540 {
541 	register const char *cp = (const char *)tp + nbpTupleSize;
542 
543 	ND_PRINT((ndo, " "));
544 
545 	/* Object */
546 	ND_PRINT((ndo, "\""));
547 	if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
548 		/* Type */
549 		ND_PRINT((ndo, ":"));
550 		if ((cp = print_cstring(ndo, cp, ep)) != NULL) {
551 			/* Zone */
552 			ND_PRINT((ndo, "@"));
553 			if ((cp = print_cstring(ndo, cp, ep)) != NULL)
554 				ND_PRINT((ndo, "\""));
555 		}
556 	}
557 	return ((const struct atNBPtuple *)cp);
558 }
559 
560 
561 #define HASHNAMESIZE 4096
562 
563 struct hnamemem {
564 	int addr;
565 	char *name;
566 	struct hnamemem *nxt;
567 };
568 
569 static struct hnamemem hnametable[HASHNAMESIZE];
570 
571 static const char *
ataddr_string(netdissect_options * ndo,u_short atnet,u_char athost)572 ataddr_string(netdissect_options *ndo,
573               u_short atnet, u_char athost)
574 {
575 	register struct hnamemem *tp, *tp2;
576 	register int i = (atnet << 8) | athost;
577 	char nambuf[256+1];
578 	static int first = 1;
579 	FILE *fp;
580 
581 	/*
582 	 * if this is the first call, see if there's an AppleTalk
583 	 * number to name map file.
584 	 */
585 	if (first && (first = 0, !ndo->ndo_nflag)
586 	    && (fp = fopen("/etc/atalk.names", "r"))) {
587 		char line[256];
588 		int i1, i2;
589 
590 		while (fgets(line, sizeof(line), fp)) {
591 			if (line[0] == '\n' || line[0] == 0 || line[0] == '#')
592 				continue;
593 			if (sscanf(line, "%d.%d %256s", &i1, &i2, nambuf) == 3)
594 				/* got a hostname. */
595 				i2 |= (i1 << 8);
596 			else if (sscanf(line, "%d %256s", &i1, nambuf) == 2)
597 				/* got a net name */
598 				i2 = (i1 << 8) | 255;
599 			else
600 				continue;
601 
602 			for (tp = &hnametable[i2 & (HASHNAMESIZE-1)];
603 			     tp->nxt; tp = tp->nxt)
604 				;
605 			tp->addr = i2;
606 			tp->nxt = newhnamemem(ndo);
607 			tp->name = strdup(nambuf);
608 			if (tp->name == NULL)
609 				(*ndo->ndo_error)(ndo,
610 						  "ataddr_string: strdup(nambuf)");
611 		}
612 		fclose(fp);
613 	}
614 
615 	for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
616 		if (tp->addr == i)
617 			return (tp->name);
618 
619 	/* didn't have the node name -- see if we've got the net name */
620 	i |= 255;
621 	for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
622 		if (tp2->addr == i) {
623 			tp->addr = (atnet << 8) | athost;
624 			tp->nxt = newhnamemem(ndo);
625 			(void)snprintf(nambuf, sizeof(nambuf), "%s.%d",
626 			    tp2->name, athost);
627 			tp->name = strdup(nambuf);
628 			if (tp->name == NULL)
629 				(*ndo->ndo_error)(ndo,
630 						  "ataddr_string: strdup(nambuf)");
631 			return (tp->name);
632 		}
633 
634 	tp->addr = (atnet << 8) | athost;
635 	tp->nxt = newhnamemem(ndo);
636 	if (athost != 255)
637 		(void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet, athost);
638 	else
639 		(void)snprintf(nambuf, sizeof(nambuf), "%d", atnet);
640 	tp->name = strdup(nambuf);
641 	if (tp->name == NULL)
642 		(*ndo->ndo_error)(ndo, "ataddr_string: strdup(nambuf)");
643 
644 	return (tp->name);
645 }
646 
647 static const struct tok skt2str[] = {
648 	{ rtmpSkt,	"rtmp" },	/* routing table maintenance */
649 	{ nbpSkt,	"nis" },	/* name info socket */
650 	{ echoSkt,	"echo" },	/* AppleTalk echo protocol */
651 	{ zipSkt,	"zip" },	/* zone info protocol */
652 	{ 0,		NULL }
653 };
654 
655 static const char *
ddpskt_string(netdissect_options * ndo,register int skt)656 ddpskt_string(netdissect_options *ndo,
657               register int skt)
658 {
659 	static char buf[8];
660 
661 	if (ndo->ndo_nflag) {
662 		(void)snprintf(buf, sizeof(buf), "%d", skt);
663 		return (buf);
664 	}
665 	return (tok2str(skt2str, "%d", skt));
666 }
667