2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
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
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.
21 * Format and print AppleTalk packets.
25 static const char rcsid[] _U_ =
26 "@(#) $Header: /tcpdump/master/tcpdump/print-atalk.c,v 1.78.2.2 2003/11/16 08:51:11 guy Exp $ (LBL)";
33 #include <tcpdump-stdinc.h>
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"
46 static struct tok type2str[] = {
48 { ddpRTMPrequest, "rtmpReq" },
57 u_int16_t htype, ptype;
58 u_int8_t halen, palen;
66 static char tstr[] = "[|atalk]";
68 static void atp_print(const struct atATP *, u_int);
69 static void atp_bitmap_print(u_char);
70 static void nbp_print(const struct atNBP *, u_int, u_short, u_char, u_char);
71 static const char *print_cstring(const char *, const u_char *);
72 static const struct atNBPtuple *nbp_tuple_print(const struct atNBPtuple *,
74 u_short, u_char, u_char);
75 static const struct atNBPtuple *nbp_name_print(const struct atNBPtuple *,
77 static const char *ataddr_string(u_short, u_char);
78 static void ddp_print(const u_char *, u_int, int, u_short, u_char, u_char);
79 static const char *ddpskt_string(int);
82 * Print LLAP packets received on a physical LocalTalk interface.
85 ltalk_if_print(const struct pcap_pkthdr *h, const u_char *p)
87 return (llap_print(p, h->caplen));
91 * Print AppleTalk LLAP packets.
94 llap_print(register const u_char *bp, u_int length)
96 register const struct LAP *lp;
97 register const struct atDDP *dp;
98 register const struct atShortDDP *sdp;
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
110 lp = (const struct LAP *)bp;
112 length -= sizeof(*lp);
113 hdrlen = sizeof(*lp);
117 if (length < ddpSSize) {
118 (void)printf(" [|sddp %d]", length);
121 sdp = (const struct atShortDDP *)bp;
123 ataddr_string(0, lp->src), ddpskt_string(sdp->srcSkt));
125 ataddr_string(0, lp->dst), ddpskt_string(sdp->dstSkt));
129 ddp_print(bp, length, sdp->type, 0, lp->src, sdp->srcSkt);
133 if (length < ddpSize) {
134 (void)printf(" [|ddp %d]", length);
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));
142 ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
143 ddpskt_string(dp->dstSkt));
147 ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
152 klap_print(bp, length);
157 printf("%d > %d at-lap#%d %d",
158 lp->src, lp->dst, lp->type, length);
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
170 atalk_print(register const u_char *bp, u_int length)
172 register const struct atDDP *dp;
175 if (length < ddpSize) {
176 (void)printf(" [|ddp %d]", length);
179 dp = (const struct atDDP *)bp;
180 snet = EXTRACT_16BITS(&dp->srcNet);
181 printf("%s.%s", ataddr_string(snet, dp->srcNode),
182 ddpskt_string(dp->srcSkt));
184 ataddr_string(EXTRACT_16BITS(&dp->dstNet), dp->dstNode),
185 ddpskt_string(dp->dstSkt));
188 ddp_print(bp, length, dp->type, snet, dp->srcNode, dp->srcSkt);
191 /* XXX should probably pass in the snap header and do checks like arp_print() */
193 aarp_print(register const u_char *bp, u_int length)
195 register const struct aarp *ap;
197 #define AT(member) ataddr_string((ap->member[1]<<8)|ap->member[2],ap->member[3])
200 ap = (const struct aarp *)bp;
201 if (EXTRACT_16BITS(&ap->htype) == 1 &&
202 EXTRACT_16BITS(&ap->ptype) == ETHERTYPE_ATALK &&
203 ap->halen == 6 && ap->palen == 4 )
204 switch (EXTRACT_16BITS(&ap->op)) {
206 case 1: /* request */
207 (void)printf("who-has %s tell %s",
208 AT(pdaddr), AT(psaddr));
211 case 2: /* response */
212 (void)printf("reply %s is-at %s",
213 AT(pdaddr), etheraddr_string(ap->hdaddr));
216 case 3: /* probe (oy!) */
217 (void)printf("probe %s tell %s",
218 AT(pdaddr), AT(psaddr));
221 (void)printf("len %u op %u htype %u ptype %#x halen %u palen %u",
222 length, EXTRACT_16BITS(&ap->op), EXTRACT_16BITS(&ap->htype),
223 EXTRACT_16BITS(&ap->ptype), ap->halen, ap->palen);
227 * Print AppleTalk Datagram Delivery Protocol packets.
230 ddp_print(register const u_char *bp, register u_int length, register int t,
231 register u_short snet, register u_char snode, u_char skt)
237 nbp_print((const struct atNBP *)bp, length, snet, snode, skt);
241 atp_print((const struct atATP *)bp, length);
245 (void)printf(" at-%s %d", tok2str(type2str, NULL, t), length);
251 atp_print(register const struct atATP *ap, u_int length)
256 if ((const u_char *)(ap + 1) > snapend) {
257 /* Just bail if we don't have the whole chunk. */
261 length -= sizeof(*ap);
262 switch (ap->control & 0xc0) {
265 (void)printf(" atp-req%s %d",
266 ap->control & atpXO? " " : "*",
267 EXTRACT_16BITS(&ap->transID));
269 atp_bitmap_print(ap->bitmap);
272 (void)printf(" [len=%d]", length);
274 switch (ap->control & (atpEOM|atpSTS)) {
276 (void)printf(" [EOM]");
279 (void)printf(" [STS]");
282 (void)printf(" [EOM,STS]");
288 (void)printf(" atp-resp%s%d:%d (%d)",
289 ap->control & atpEOM? "*" : " ",
290 EXTRACT_16BITS(&ap->transID), ap->bitmap, length);
291 switch (ap->control & (atpXO|atpSTS)) {
293 (void)printf(" [XO]");
296 (void)printf(" [STS]");
299 (void)printf(" [XO,STS]");
305 (void)printf(" atp-rel %d", EXTRACT_16BITS(&ap->transID));
307 atp_bitmap_print(ap->bitmap);
309 /* length should be zero */
311 (void)printf(" [len=%d]", length);
313 /* there shouldn't be any control flags */
314 if (ap->control & (atpXO|atpEOM|atpSTS)) {
316 if (ap->control & atpXO) {
317 (void)printf("%cXO", c);
320 if (ap->control & atpEOM) {
321 (void)printf("%cEOM", c);
324 if (ap->control & atpSTS) {
325 (void)printf("%cSTS", c);
333 (void)printf(" atp-0x%x %d (%d)", ap->control,
334 EXTRACT_16BITS(&ap->transID), length);
337 data = EXTRACT_32BITS(&ap->userData);
339 (void)printf(" 0x%x", data);
343 atp_bitmap_print(register u_char bm)
349 * The '& 0xff' below is needed for compilers that want to sign
350 * extend a u_char, which is the case with the Ultrix compiler.
351 * (gcc is smart enough to eliminate it, at least on the Sparc).
353 if ((bm + 1) & (bm & 0xff)) {
355 for (i = 0; bm; ++i) {
357 (void)printf("%c%d", c, i);
367 (void)printf("<0-%d>", i - 1);
374 nbp_print(register const struct atNBP *np, u_int length, register u_short snet,
375 register u_char snode, register u_char skt)
377 register const struct atNBPtuple *tp =
378 (const struct atNBPtuple *)((u_char *)np + nbpHeaderSize);
382 if (length < nbpHeaderSize) {
383 (void)printf(" truncated-nbp %d", length);
387 length -= nbpHeaderSize;
389 /* must be room for at least one tuple */
390 (void)printf(" truncated-nbp %d", length + nbpHeaderSize);
393 /* ep points to end of available data */
395 if ((const u_char *)tp > ep) {
399 switch (i = np->control & 0xf0) {
403 (void)printf(i == nbpLkUp? " nbp-lkup %d:":" nbp-brRq %d:",
405 if ((const u_char *)(tp + 1) > ep) {
409 (void)nbp_name_print(tp, ep);
411 * look for anomalies: the spec says there can only
412 * be one tuple, the address must match the source
413 * address and the enumerator should be zero.
415 if ((np->control & 0xf) != 1)
416 (void)printf(" [ntup=%d]", np->control & 0xf);
418 (void)printf(" [enum=%d]", tp->enumerator);
419 if (EXTRACT_16BITS(&tp->net) != snet ||
420 tp->node != snode || tp->skt != skt)
421 (void)printf(" [addr=%s.%d]",
422 ataddr_string(EXTRACT_16BITS(&tp->net),
427 (void)printf(" nbp-reply %d:", np->id);
429 /* print each of the tuples in the reply */
430 for (i = np->control & 0xf; --i >= 0 && tp; )
431 tp = nbp_tuple_print(tp, ep, snet, snode, skt);
435 (void)printf(" nbp-0x%x %d (%d)", np->control, np->id,
441 /* print a counted string */
443 print_cstring(register const char *cp, register const u_char *ep)
445 register u_int length;
447 if (cp >= (const char *)ep) {
453 /* Spec says string can be at most 32 bytes long */
455 (void)printf("[len=%u]", length);
458 while ((int)--length >= 0) {
459 if (cp >= (const char *)ep) {
468 static const struct atNBPtuple *
469 nbp_tuple_print(register const struct atNBPtuple *tp,
470 register const u_char *ep,
471 register u_short snet, register u_char snode,
474 register const struct atNBPtuple *tpn;
476 if ((const u_char *)(tp + 1) > ep) {
480 tpn = nbp_name_print(tp, ep);
482 /* if the enumerator isn't 1, print it */
483 if (tp->enumerator != 1)
484 (void)printf("(%d)", tp->enumerator);
486 /* if the socket doesn't match the src socket, print it */
488 (void)printf(" %d", tp->skt);
490 /* if the address doesn't match the src address, it's an anomaly */
491 if (EXTRACT_16BITS(&tp->net) != snet || tp->node != snode)
492 (void)printf(" [addr=%s]",
493 ataddr_string(EXTRACT_16BITS(&tp->net), tp->node));
498 static const struct atNBPtuple *
499 nbp_name_print(const struct atNBPtuple *tp, register const u_char *ep)
501 register const char *cp = (const char *)tp + nbpTupleSize;
507 if ((cp = print_cstring(cp, ep)) != NULL) {
510 if ((cp = print_cstring(cp, ep)) != NULL) {
513 if ((cp = print_cstring(cp, ep)) != NULL)
517 return ((const struct atNBPtuple *)cp);
521 #define HASHNAMESIZE 4096
526 struct hnamemem *nxt;
529 static struct hnamemem hnametable[HASHNAMESIZE];
532 ataddr_string(u_short atnet, u_char athost)
534 register struct hnamemem *tp, *tp2;
535 register int i = (atnet << 8) | athost;
536 char nambuf[MAXHOSTNAMELEN + 20];
537 static int first = 1;
541 * if this is the first call, see if there's an AppleTalk
542 * number to name map file.
544 if (first && (first = 0, !nflag)
545 && (fp = fopen("/etc/atalk.names", "r"))) {
549 while (fgets(line, sizeof(line), fp)) {
550 if (line[0] == '\n' || line[0] == 0 || line[0] == '#')
552 if (sscanf(line, "%d.%d.%d %256s", &i1, &i2, &i3,
554 /* got a hostname. */
555 i3 |= ((i1 << 8) | i2) << 8;
556 else if (sscanf(line, "%d.%d %256s", &i1, &i2,
559 i3 = (((i1 << 8) | i2) << 8) | 255;
563 for (tp = &hnametable[i3 & (HASHNAMESIZE-1)];
564 tp->nxt; tp = tp->nxt)
567 tp->nxt = newhnamemem();
568 tp->name = strdup(nambuf);
573 for (tp = &hnametable[i & (HASHNAMESIZE-1)]; tp->nxt; tp = tp->nxt)
577 /* didn't have the node name -- see if we've got the net name */
579 for (tp2 = &hnametable[i & (HASHNAMESIZE-1)]; tp2->nxt; tp2 = tp2->nxt)
580 if (tp2->addr == i) {
581 tp->addr = (atnet << 8) | athost;
582 tp->nxt = newhnamemem();
583 (void)snprintf(nambuf, sizeof(nambuf), "%s.%d",
585 tp->name = strdup(nambuf);
589 tp->addr = (atnet << 8) | athost;
590 tp->nxt = newhnamemem();
592 (void)snprintf(nambuf, sizeof(nambuf), "%d.%d.%d",
593 atnet >> 8, atnet & 0xff, athost);
595 (void)snprintf(nambuf, sizeof(nambuf), "%d.%d", atnet >> 8,
597 tp->name = strdup(nambuf);
602 static struct tok skt2str[] = {
603 { rtmpSkt, "rtmp" }, /* routing table maintenance */
604 { nbpSkt, "nis" }, /* name info socket */
605 { echoSkt, "echo" }, /* AppleTalk echo protocol */
606 { zipSkt, "zip" }, /* zone info protocol */
611 ddpskt_string(register int skt)
616 (void)snprintf(buf, sizeof(buf), "%d", skt);
619 return (tok2str(skt2str, "%d", skt));