xref: /minix/external/bsd/tcpdump/dist/print-smb.c (revision bb9622b5) 
1 /*
2  * Copyright (C) Andrew Tridgell 1995-1999
3  *
4  * This software may be distributed either under the terms of the
5  * BSD-style license that accompanies tcpdump or the GNU GPL version 2
6  * or later
7  */
8 
9 #include <sys/cdefs.h>
10 #ifndef lint
11 __RCSID("$NetBSD: print-smb.c,v 1.5 2015/03/31 21:59:35 christos Exp $");
12 #endif
13 
14 #define NETDISSECT_REWORKED
15 #ifdef HAVE_CONFIG_H
16 #include "config.h"
17 #endif
18 
19 #include <tcpdump-stdinc.h>
20 
21 #include <string.h>
22 
23 #include "interface.h"
24 #include "extract.h"
25 #include "smb.h"
26 
27 static const char tstr[] = "[|SMB]";
28 
29 static int request = 0;
30 static int unicodestr = 0;
31 
32 const u_char *startbuf = NULL;
33 
34 struct smbdescript {
35     const char *req_f1;
36     const char *req_f2;
37     const char *rep_f1;
38     const char *rep_f2;
39     void (*fn)(netdissect_options *, const u_char *, const u_char *, const u_char *, const u_char *);
40 };
41 
42 struct smbdescriptint {
43     const char *req_f1;
44     const char *req_f2;
45     const char *rep_f1;
46     const char *rep_f2;
47     void (*fn)(netdissect_options *, const u_char *, const u_char *, int, int);
48 };
49 
50 struct smbfns
51 {
52     int id;
53     const char *name;
54     int flags;
55     struct smbdescript descript;
56 };
57 
58 struct smbfnsint
59 {
60     int id;
61     const char *name;
62     int flags;
63     struct smbdescriptint descript;
64 };
65 
66 #define DEFDESCRIPT	{ NULL, NULL, NULL, NULL, NULL }
67 
68 #define FLG_CHAIN	(1 << 0)
69 
70 static const struct smbfns *
71 smbfind(int id, const struct smbfns *list)
72 {
73     int sindex;
74 
75     for (sindex = 0; list[sindex].name; sindex++)
76 	if (list[sindex].id == id)
77 	    return(&list[sindex]);
78 
79     return(&list[0]);
80 }
81 
82 static const struct smbfnsint *
83 smbfindint(int id, const struct smbfnsint *list)
84 {
85     int sindex;
86 
87     for (sindex = 0; list[sindex].name; sindex++)
88 	if (list[sindex].id == id)
89 	    return(&list[sindex]);
90 
91     return(&list[0]);
92 }
93 
94 static void
95 trans2_findfirst(netdissect_options *ndo,
96                  const u_char *param, const u_char *data, int pcnt, int dcnt)
97 {
98     const char *fmt;
99 
100     if (request)
101 	fmt = "Attribute=[A]\nSearchCount=[d]\nFlags=[w]\nLevel=[dP4]\nFile=[S]\n";
102     else
103 	fmt = "Handle=[w]\nCount=[d]\nEOS=[w]\nEoffset=[d]\nLastNameOfs=[w]\n";
104 
105     smb_fdata(ndo, param, fmt, param + pcnt, unicodestr);
106     if (dcnt) {
107 	ND_PRINT((ndo, "data:\n"));
108 	print_data(ndo, data, dcnt);
109     }
110 }
111 
112 static void
113 trans2_qfsinfo(netdissect_options *ndo,
114                const u_char *param, const u_char *data, int pcnt, int dcnt)
115 {
116     static int level = 0;
117     const char *fmt="";
118 
119     if (request) {
120 	ND_TCHECK2(*param, 2);
121 	level = EXTRACT_LE_16BITS(param);
122 	fmt = "InfoLevel=[d]\n";
123 	smb_fdata(ndo, param, fmt, param + pcnt, unicodestr);
124     } else {
125 	switch (level) {
126 	case 1:
127 	    fmt = "idFileSystem=[W]\nSectorUnit=[D]\nUnit=[D]\nAvail=[D]\nSectorSize=[d]\n";
128 	    break;
129 	case 2:
130 	    fmt = "CreationTime=[T2]VolNameLength=[lb]\nVolumeLabel=[c]\n";
131 	    break;
132 	case 0x105:
133 	    fmt = "Capabilities=[W]\nMaxFileLen=[D]\nVolNameLen=[lD]\nVolume=[C]\n";
134 	    break;
135 	default:
136 	    fmt = "UnknownLevel\n";
137 	    break;
138 	}
139 	smb_fdata(ndo, data, fmt, data + dcnt, unicodestr);
140     }
141     if (dcnt) {
142 	ND_PRINT((ndo, "data:\n"));
143 	print_data(ndo, data, dcnt);
144     }
145     return;
146 trunc:
147     ND_PRINT((ndo, "%s", tstr));
148 }
149 
150 static const struct smbfnsint trans2_fns[] = {
151     { 0, "TRANSACT2_OPEN", 0,
152 	{ "Flags2=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]\nOFun=[w]\nSize=[D]\nRes=([w, w, w, w, w])\nPath=[S]",
153 	  NULL,
154 	  "Handle=[d]\nAttrib=[A]\nTime=[T2]\nSize=[D]\nAccess=[w]\nType=[w]\nState=[w]\nAction=[w]\nInode=[W]\nOffErr=[d]\n|EALength=[d]\n",
155 	  NULL, NULL }},
156     { 1, "TRANSACT2_FINDFIRST", 0,
157 	{ NULL, NULL, NULL, NULL, trans2_findfirst }},
158     { 2, "TRANSACT2_FINDNEXT", 0, DEFDESCRIPT },
159     { 3, "TRANSACT2_QFSINFO", 0,
160 	{ NULL, NULL, NULL, NULL, trans2_qfsinfo }},
161     { 4, "TRANSACT2_SETFSINFO", 0, DEFDESCRIPT },
162     { 5, "TRANSACT2_QPATHINFO", 0, DEFDESCRIPT },
163     { 6, "TRANSACT2_SETPATHINFO", 0, DEFDESCRIPT },
164     { 7, "TRANSACT2_QFILEINFO", 0, DEFDESCRIPT },
165     { 8, "TRANSACT2_SETFILEINFO", 0, DEFDESCRIPT },
166     { 9, "TRANSACT2_FSCTL", 0, DEFDESCRIPT },
167     { 10, "TRANSACT2_IOCTL", 0, DEFDESCRIPT },
168     { 11, "TRANSACT2_FINDNOTIFYFIRST", 0, DEFDESCRIPT },
169     { 12, "TRANSACT2_FINDNOTIFYNEXT", 0, DEFDESCRIPT },
170     { 13, "TRANSACT2_MKDIR", 0, DEFDESCRIPT },
171     { -1, NULL, 0, DEFDESCRIPT }
172 };
173 
174 
175 static void
176 print_trans2(netdissect_options *ndo,
177              const u_char *words, const u_char *dat, const u_char *buf, const u_char *maxbuf)
178 {
179     u_int bcc;
180     static const struct smbfnsint *fn = &trans2_fns[0];
181     const u_char *data, *param;
182     const u_char *w = words + 1;
183     const char *f1 = NULL, *f2 = NULL;
184     int pcnt, dcnt;
185 
186     ND_TCHECK(words[0]);
187     if (request) {
188 	ND_TCHECK2(w[14 * 2], 2);
189 	pcnt = EXTRACT_LE_16BITS(w + 9 * 2);
190 	param = buf + EXTRACT_LE_16BITS(w + 10 * 2);
191 	dcnt = EXTRACT_LE_16BITS(w + 11 * 2);
192 	data = buf + EXTRACT_LE_16BITS(w + 12 * 2);
193 	fn = smbfindint(EXTRACT_LE_16BITS(w + 14 * 2), trans2_fns);
194     } else {
195 	if (words[0] == 0) {
196 	    ND_PRINT((ndo, "%s\n", fn->name));
197 	    ND_PRINT((ndo, "Trans2Interim\n"));
198 	    return;
199 	}
200 	ND_TCHECK2(w[7 * 2], 2);
201 	pcnt = EXTRACT_LE_16BITS(w + 3 * 2);
202 	param = buf + EXTRACT_LE_16BITS(w + 4 * 2);
203 	dcnt = EXTRACT_LE_16BITS(w + 6 * 2);
204 	data = buf + EXTRACT_LE_16BITS(w + 7 * 2);
205     }
206 
207     ND_PRINT((ndo, "%s param_length=%d data_length=%d\n", fn->name, pcnt, dcnt));
208 
209     if (request) {
210 	if (words[0] == 8) {
211 	    smb_fdata(ndo, words + 1,
212 		"Trans2Secondary\nTotParam=[d]\nTotData=[d]\nParamCnt=[d]\nParamOff=[d]\nParamDisp=[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nHandle=[d]\n",
213 		maxbuf, unicodestr);
214 	    return;
215 	} else {
216 	    smb_fdata(ndo, words + 1,
217 		"TotParam=[d]\nTotData=[d]\nMaxParam=[d]\nMaxData=[d]\nMaxSetup=[b][P1]\nFlags=[w]\nTimeOut=[D]\nRes1=[w]\nParamCnt=[d]\nParamOff=[d]\nDataCnt=[d]\nDataOff=[d]\nSetupCnt=[b][P1]\n",
218 		words + 1 + 14 * 2, unicodestr);
219 	}
220 	f1 = fn->descript.req_f1;
221 	f2 = fn->descript.req_f2;
222     } else {
223 	smb_fdata(ndo, words + 1,
224 	    "TotParam=[d]\nTotData=[d]\nRes1=[w]\nParamCnt=[d]\nParamOff=[d]\nParamDisp[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nSetupCnt=[b][P1]\n",
225 	    words + 1 + 10 * 2, unicodestr);
226 	f1 = fn->descript.rep_f1;
227 	f2 = fn->descript.rep_f2;
228     }
229 
230     ND_TCHECK2(*dat, 2);
231     bcc = EXTRACT_LE_16BITS(dat);
232     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
233     if (fn->descript.fn)
234 	(*fn->descript.fn)(ndo, param, data, pcnt, dcnt);
235     else {
236 	smb_fdata(ndo, param, f1 ? f1 : "Parameters=\n", param + pcnt, unicodestr);
237 	smb_fdata(ndo, data, f2 ? f2 : "Data=\n", data + dcnt, unicodestr);
238     }
239     return;
240 trunc:
241     ND_PRINT((ndo, "%s", tstr));
242 }
243 
244 static void
245 print_browse(netdissect_options *ndo,
246              const u_char *param, int paramlen, const u_char *data, int datalen)
247 {
248     const u_char *maxbuf = data + datalen;
249     int command;
250 
251     ND_TCHECK(data[0]);
252     command = data[0];
253 
254     smb_fdata(ndo, param, "BROWSE PACKET\n|Param ", param+paramlen, unicodestr);
255 
256     switch (command) {
257     case 0xF:
258 	data = smb_fdata(ndo, data,
259 	    "BROWSE PACKET:\nType=[B] (LocalMasterAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
260 	    maxbuf, unicodestr);
261 	break;
262 
263     case 0x1:
264 	data = smb_fdata(ndo, data,
265 	    "BROWSE PACKET:\nType=[B] (HostAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
266 	    maxbuf, unicodestr);
267 	break;
268 
269     case 0x2:
270 	data = smb_fdata(ndo, data,
271 	    "BROWSE PACKET:\nType=[B] (AnnouncementRequest)\nFlags=[B]\nReplySystemName=[S]\n",
272 	    maxbuf, unicodestr);
273 	break;
274 
275     case 0xc:
276 	data = smb_fdata(ndo, data,
277 	    "BROWSE PACKET:\nType=[B] (WorkgroupAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nCommentPointer=[W]\nServerName=[S]\n",
278 	    maxbuf, unicodestr);
279 	break;
280 
281     case 0x8:
282 	data = smb_fdata(ndo, data,
283 	    "BROWSE PACKET:\nType=[B] (ElectionFrame)\nElectionVersion=[B]\nOSSummary=[W]\nUptime=[(W, W)]\nServerName=[S]\n",
284 	    maxbuf, unicodestr);
285 	break;
286 
287     case 0xb:
288 	data = smb_fdata(ndo, data,
289 	    "BROWSE PACKET:\nType=[B] (BecomeBackupBrowser)\nName=[S]\n",
290 	    maxbuf, unicodestr);
291 	break;
292 
293     case 0x9:
294 	data = smb_fdata(ndo, data,
295 	    "BROWSE PACKET:\nType=[B] (GetBackupList)\nListCount?=[B]\nToken=[W]\n",
296 	    maxbuf, unicodestr);
297 	break;
298 
299     case 0xa:
300 	data = smb_fdata(ndo, data,
301 	    "BROWSE PACKET:\nType=[B] (BackupListResponse)\nServerCount?=[B]\nToken=[W]\n*Name=[S]\n",
302 	    maxbuf, unicodestr);
303 	break;
304 
305     case 0xd:
306 	data = smb_fdata(ndo, data,
307 	    "BROWSE PACKET:\nType=[B] (MasterAnnouncement)\nMasterName=[S]\n",
308 	    maxbuf, unicodestr);
309 	break;
310 
311     case 0xe:
312 	data = smb_fdata(ndo, data,
313 	    "BROWSE PACKET:\nType=[B] (ResetBrowser)\nOptions=[B]\n", maxbuf, unicodestr);
314 	break;
315 
316     default:
317 	data = smb_fdata(ndo, data, "Unknown Browser Frame ", maxbuf, unicodestr);
318 	break;
319     }
320     return;
321 trunc:
322     ND_PRINT((ndo, "%s", tstr));
323 }
324 
325 
326 static void
327 print_ipc(netdissect_options *ndo,
328           const u_char *param, int paramlen, const u_char *data, int datalen)
329 {
330     if (paramlen)
331 	smb_fdata(ndo, param, "Command=[w]\nStr1=[S]\nStr2=[S]\n", param + paramlen,
332 	    unicodestr);
333     if (datalen)
334 	smb_fdata(ndo, data, "IPC ", data + datalen, unicodestr);
335 }
336 
337 
338 static void
339 print_trans(netdissect_options *ndo,
340             const u_char *words, const u_char *data1, const u_char *buf, const u_char *maxbuf)
341 {
342     u_int bcc;
343     const char *f1, *f2, *f3, *f4;
344     const u_char *data, *param;
345     const u_char *w = words + 1;
346     int datalen, paramlen;
347 
348     if (request) {
349 	ND_TCHECK2(w[12 * 2], 2);
350 	paramlen = EXTRACT_LE_16BITS(w + 9 * 2);
351 	param = buf + EXTRACT_LE_16BITS(w + 10 * 2);
352 	datalen = EXTRACT_LE_16BITS(w + 11 * 2);
353 	data = buf + EXTRACT_LE_16BITS(w + 12 * 2);
354 	f1 = "TotParamCnt=[d] \nTotDataCnt=[d] \nMaxParmCnt=[d] \nMaxDataCnt=[d]\nMaxSCnt=[d] \nTransFlags=[w] \nRes1=[w] \nRes2=[w] \nRes3=[w]\nParamCnt=[d] \nParamOff=[d] \nDataCnt=[d] \nDataOff=[d] \nSUCnt=[d]\n";
355 	f2 = "|Name=[S]\n";
356 	f3 = "|Param ";
357 	f4 = "|Data ";
358     } else {
359 	ND_TCHECK2(w[7 * 2], 2);
360 	paramlen = EXTRACT_LE_16BITS(w + 3 * 2);
361 	param = buf + EXTRACT_LE_16BITS(w + 4 * 2);
362 	datalen = EXTRACT_LE_16BITS(w + 6 * 2);
363 	data = buf + EXTRACT_LE_16BITS(w + 7 * 2);
364 	f1 = "TotParamCnt=[d] \nTotDataCnt=[d] \nRes1=[d]\nParamCnt=[d] \nParamOff=[d] \nRes2=[d] \nDataCnt=[d] \nDataOff=[d] \nRes3=[d]\nLsetup=[d]\n";
365 	f2 = "|Unknown ";
366 	f3 = "|Param ";
367 	f4 = "|Data ";
368     }
369 
370     smb_fdata(ndo, words + 1, f1, min(words + 1 + 2 * words[0], maxbuf),
371         unicodestr);
372 
373     ND_TCHECK2(*data1, 2);
374     bcc = EXTRACT_LE_16BITS(data1);
375     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
376     if (bcc > 0) {
377 	smb_fdata(ndo, data1 + 2, f2, maxbuf - (paramlen + datalen), unicodestr);
378 
379 	if (strcmp((const char *)(data1 + 2), "\\MAILSLOT\\BROWSE") == 0) {
380 	    print_browse(ndo, param, paramlen, data, datalen);
381 	    return;
382 	}
383 
384 	if (strcmp((const char *)(data1 + 2), "\\PIPE\\LANMAN") == 0) {
385 	    print_ipc(ndo, param, paramlen, data, datalen);
386 	    return;
387 	}
388 
389 	if (paramlen)
390 	    smb_fdata(ndo, param, f3, min(param + paramlen, maxbuf), unicodestr);
391 	if (datalen)
392 	    smb_fdata(ndo, data, f4, min(data + datalen, maxbuf), unicodestr);
393     }
394     return;
395 trunc:
396     ND_PRINT((ndo, "%s", tstr));
397 }
398 
399 
400 static void
401 print_negprot(netdissect_options *ndo,
402               const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
403 {
404     u_int wct, bcc;
405     const char *f1 = NULL, *f2 = NULL;
406 
407     ND_TCHECK(words[0]);
408     wct = words[0];
409     if (request)
410 	f2 = "*|Dialect=[Y]\n";
411     else {
412 	if (wct == 1)
413 	    f1 = "Core Protocol\nDialectIndex=[d]";
414 	else if (wct == 17)
415 	    f1 = "NT1 Protocol\nDialectIndex=[d]\nSecMode=[B]\nMaxMux=[d]\nNumVcs=[d]\nMaxBuffer=[D]\nRawSize=[D]\nSessionKey=[W]\nCapabilities=[W]\nServerTime=[T3]TimeZone=[d]\nCryptKey=";
416 	else if (wct == 13)
417 	    f1 = "Coreplus/Lanman1/Lanman2 Protocol\nDialectIndex=[d]\nSecMode=[w]\nMaxXMit=[d]\nMaxMux=[d]\nMaxVcs=[d]\nBlkMode=[w]\nSessionKey=[W]\nServerTime=[T1]TimeZone=[d]\nRes=[W]\nCryptKey=";
418     }
419 
420     if (f1)
421 	smb_fdata(ndo, words + 1, f1, min(words + 1 + wct * 2, maxbuf),
422 	    unicodestr);
423     else
424 	print_data(ndo, words + 1, min(wct * 2, PTR_DIFF(maxbuf, words + 1)));
425 
426     ND_TCHECK2(*data, 2);
427     bcc = EXTRACT_LE_16BITS(data);
428     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
429     if (bcc > 0) {
430 	if (f2)
431 	    smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_16BITS(data),
432 		maxbuf), unicodestr);
433 	else
434 	    print_data(ndo, data + 2, min(EXTRACT_LE_16BITS(data), PTR_DIFF(maxbuf, data + 2)));
435     }
436     return;
437 trunc:
438     ND_PRINT((ndo, "%s", tstr));
439 }
440 
441 static void
442 print_sesssetup(netdissect_options *ndo,
443                 const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
444 {
445     u_int wct, bcc;
446     const char *f1 = NULL, *f2 = NULL;
447 
448     ND_TCHECK(words[0]);
449     wct = words[0];
450     if (request) {
451 	if (wct == 10)
452 	    f1 = "Com2=[w]\nOff2=[d]\nBufSize=[d]\nMpxMax=[d]\nVcNum=[d]\nSessionKey=[W]\nPassLen=[d]\nCryptLen=[d]\nCryptOff=[d]\nPass&Name=\n";
453 	else
454 	    f1 = "Com2=[B]\nRes1=[B]\nOff2=[d]\nMaxBuffer=[d]\nMaxMpx=[d]\nVcNumber=[d]\nSessionKey=[W]\nCaseInsensitivePasswordLength=[d]\nCaseSensitivePasswordLength=[d]\nRes=[W]\nCapabilities=[W]\nPass1&Pass2&Account&Domain&OS&LanMan=\n";
455     } else {
456 	if (wct == 3) {
457 	    f1 = "Com2=[w]\nOff2=[d]\nAction=[w]\n";
458 	} else if (wct == 13) {
459 	    f1 = "Com2=[B]\nRes=[B]\nOff2=[d]\nAction=[w]\n";
460 	    f2 = "NativeOS=[S]\nNativeLanMan=[S]\nPrimaryDomain=[S]\n";
461 	}
462     }
463 
464     if (f1)
465 	smb_fdata(ndo, words + 1, f1, min(words + 1 + wct * 2, maxbuf),
466 	    unicodestr);
467     else
468 	print_data(ndo, words + 1, min(wct * 2, PTR_DIFF(maxbuf, words + 1)));
469 
470     ND_TCHECK2(*data, 2);
471     bcc = EXTRACT_LE_16BITS(data);
472     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
473     if (bcc > 0) {
474 	if (f2)
475 	    smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_16BITS(data),
476 		maxbuf), unicodestr);
477 	else
478 	    print_data(ndo, data + 2, min(EXTRACT_LE_16BITS(data), PTR_DIFF(maxbuf, data + 2)));
479     }
480     return;
481 trunc:
482     ND_PRINT((ndo, "%s", tstr));
483 }
484 
485 static void
486 print_lockingandx(netdissect_options *ndo,
487                   const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
488 {
489     u_int wct, bcc;
490     const u_char *maxwords;
491     const char *f1 = NULL, *f2 = NULL;
492 
493     ND_TCHECK(words[0]);
494     wct = words[0];
495     if (request) {
496 	f1 = "Com2=[w]\nOff2=[d]\nHandle=[d]\nLockType=[w]\nTimeOut=[D]\nUnlockCount=[d]\nLockCount=[d]\n";
497 	ND_TCHECK(words[7]);
498 	if (words[7] & 0x10)
499 	    f2 = "*Process=[d]\n[P2]Offset=[M]\nLength=[M]\n";
500 	else
501 	    f2 = "*Process=[d]\nOffset=[D]\nLength=[D]\n";
502     } else {
503 	f1 = "Com2=[w]\nOff2=[d]\n";
504     }
505 
506     maxwords = min(words + 1 + wct * 2, maxbuf);
507     if (wct)
508 	smb_fdata(ndo, words + 1, f1, maxwords, unicodestr);
509 
510     ND_TCHECK2(*data, 2);
511     bcc = EXTRACT_LE_16BITS(data);
512     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
513     if (bcc > 0) {
514 	if (f2)
515 	    smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_16BITS(data),
516 		maxbuf), unicodestr);
517 	else
518 	    print_data(ndo, data + 2, min(EXTRACT_LE_16BITS(data), PTR_DIFF(maxbuf, data + 2)));
519     }
520     return;
521 trunc:
522     ND_PRINT((ndo, "%s", tstr));
523 }
524 
525 
526 static const struct smbfns smb_fns[] = {
527     { -1, "SMBunknown", 0, DEFDESCRIPT },
528 
529     { SMBtcon, "SMBtcon", 0,
530 	{ NULL, "Path=[Z]\nPassword=[Z]\nDevice=[Z]\n",
531 	  "MaxXmit=[d]\nTreeId=[d]\n", NULL,
532 	  NULL } },
533 
534     { SMBtdis, "SMBtdis", 0, DEFDESCRIPT },
535     { SMBexit,  "SMBexit", 0, DEFDESCRIPT },
536     { SMBioctl, "SMBioctl", 0, DEFDESCRIPT },
537 
538     { SMBecho, "SMBecho", 0,
539 	{ "ReverbCount=[d]\n", NULL,
540 	  "SequenceNum=[d]\n", NULL,
541 	  NULL } },
542 
543     { SMBulogoffX, "SMBulogoffX", FLG_CHAIN, DEFDESCRIPT },
544 
545     { SMBgetatr, "SMBgetatr", 0,
546 	{ NULL, "Path=[Z]\n",
547 	  "Attribute=[A]\nTime=[T2]Size=[D]\nRes=([w,w,w,w,w])\n", NULL,
548 	  NULL } },
549 
550     { SMBsetatr, "SMBsetatr", 0,
551 	{ "Attribute=[A]\nTime=[T2]Res=([w,w,w,w,w])\n", "Path=[Z]\n",
552 	  NULL, NULL, NULL } },
553 
554     { SMBchkpth, "SMBchkpth", 0,
555        { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
556 
557     { SMBsearch, "SMBsearch", 0,
558 	{ "Count=[d]\nAttrib=[A]\n",
559 	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\n",
560 	  "Count=[d]\n",
561 	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
562 	  NULL } },
563 
564     { SMBopen, "SMBopen", 0,
565 	{ "Mode=[w]\nAttribute=[A]\n", "Path=[Z]\n",
566 	  "Handle=[d]\nOAttrib=[A]\nTime=[T2]Size=[D]\nAccess=[w]\n",
567 	  NULL, NULL } },
568 
569     { SMBcreate, "SMBcreate", 0,
570 	{ "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },
571 
572     { SMBmknew, "SMBmknew", 0,
573 	{ "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },
574 
575     { SMBunlink, "SMBunlink", 0,
576 	{ "Attrib=[A]\n", "Path=[Z]\n", NULL, NULL, NULL } },
577 
578     { SMBread, "SMBread", 0,
579 	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
580 	  "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },
581 
582     { SMBwrite, "SMBwrite", 0,
583 	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
584 	  "Count=[d]\n", NULL, NULL } },
585 
586     { SMBclose, "SMBclose", 0,
587 	{ "Handle=[d]\nTime=[T2]", NULL, NULL, NULL, NULL } },
588 
589     { SMBmkdir, "SMBmkdir", 0,
590 	{ NULL, "Path=[Z]\n", NULL, NULL, NULL } },
591 
592     { SMBrmdir, "SMBrmdir", 0,
593 	{ NULL, "Path=[Z]\n", NULL, NULL, NULL } },
594 
595     { SMBdskattr, "SMBdskattr", 0,
596 	{ NULL, NULL,
597 	  "TotalUnits=[d]\nBlocksPerUnit=[d]\nBlockSize=[d]\nFreeUnits=[d]\nMedia=[w]\n",
598 	  NULL, NULL } },
599 
600     { SMBmv, "SMBmv", 0,
601 	{ "Attrib=[A]\n", "OldPath=[Z]\nNewPath=[Z]\n", NULL, NULL, NULL } },
602 
603     /*
604      * this is a Pathworks specific call, allowing the
605      * changing of the root path
606      */
607     { pSETDIR, "SMBsetdir", 0, { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
608 
609     { SMBlseek, "SMBlseek", 0,
610 	{ "Handle=[d]\nMode=[w]\nOffset=[D]\n", "Offset=[D]\n", NULL, NULL, NULL } },
611 
612     { SMBflush, "SMBflush", 0, { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
613 
614     { SMBsplopen, "SMBsplopen", 0,
615 	{ "SetupLen=[d]\nMode=[w]\n", "Ident=[Z]\n", "Handle=[d]\n",
616 	  NULL, NULL } },
617 
618     { SMBsplclose, "SMBsplclose", 0,
619 	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },
620 
621     { SMBsplretq, "SMBsplretq", 0,
622 	{ "MaxCount=[d]\nStartIndex=[d]\n", NULL,
623 	  "Count=[d]\nIndex=[d]\n",
624 	  "*Time=[T2]Status=[B]\nJobID=[d]\nSize=[D]\nRes=[B]Name=[s16]\n",
625 	  NULL } },
626 
627     { SMBsplwr, "SMBsplwr", 0,
628 	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },
629 
630     { SMBlock, "SMBlock", 0,
631 	{ "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },
632 
633     { SMBunlock, "SMBunlock", 0,
634 	{ "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },
635 
636     /* CORE+ PROTOCOL FOLLOWS */
637 
638     { SMBreadbraw, "SMBreadbraw", 0,
639 	{ "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[d]\n",
640 	  NULL, NULL, NULL, NULL } },
641 
642     { SMBwritebraw, "SMBwritebraw", 0,
643 	{ "Handle=[d]\nTotalCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\n|DataSize=[d]\nDataOff=[d]\n",
644 	  NULL, "WriteRawAck", NULL, NULL } },
645 
646     { SMBwritec, "SMBwritec", 0,
647 	{ NULL, NULL, "Count=[d]\n", NULL, NULL } },
648 
649     { SMBwriteclose, "SMBwriteclose", 0,
650 	{ "Handle=[d]\nCount=[d]\nOffset=[D]\nTime=[T2]Res=([w,w,w,w,w,w])",
651 	  NULL, "Count=[d]\n", NULL, NULL } },
652 
653     { SMBlockread, "SMBlockread", 0,
654 	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
655 	  "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },
656 
657     { SMBwriteunlock, "SMBwriteunlock", 0,
658 	{ "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
659 	  "Count=[d]\n", NULL, NULL } },
660 
661     { SMBreadBmpx, "SMBreadBmpx", 0,
662 	{ "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[w]\n",
663 	  NULL,
664 	  "Offset=[D]\nTotCount=[d]\nRemaining=[d]\nRes=([w,w])\nDataSize=[d]\nDataOff=[d]\n",
665 	  NULL, NULL } },
666 
667     { SMBwriteBmpx, "SMBwriteBmpx", 0,
668 	{ "Handle=[d]\nTotCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\nDataSize=[d]\nDataOff=[d]\n", NULL,
669 	  "Remaining=[d]\n", NULL, NULL } },
670 
671     { SMBwriteBs, "SMBwriteBs", 0,
672 	{ "Handle=[d]\nTotCount=[d]\nOffset=[D]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\n",
673 	  NULL, "Count=[d]\n", NULL, NULL } },
674 
675     { SMBsetattrE, "SMBsetattrE", 0,
676 	{ "Handle=[d]\nCreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]", NULL,
677 	  NULL, NULL, NULL } },
678 
679     { SMBgetattrE, "SMBgetattrE", 0,
680 	{ "Handle=[d]\n", NULL,
681 	  "CreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]Size=[D]\nAllocSize=[D]\nAttribute=[A]\n",
682 	  NULL, NULL } },
683 
684     { SMBtranss, "SMBtranss", 0, DEFDESCRIPT },
685     { SMBioctls, "SMBioctls", 0, DEFDESCRIPT },
686 
687     { SMBcopy, "SMBcopy", 0,
688 	{ "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
689 	  "CopyCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },
690 
691     { SMBmove, "SMBmove", 0,
692 	{ "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
693 	  "MoveCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },
694 
695     { SMBopenX, "SMBopenX", FLG_CHAIN,
696 	{ "Com2=[w]\nOff2=[d]\nFlags=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]OFun=[w]\nSize=[D]\nTimeOut=[D]\nRes=[W]\n",
697 	  "Path=[S]\n",
698 	  "Com2=[w]\nOff2=[d]\nHandle=[d]\nAttrib=[A]\nTime=[T2]Size=[D]\nAccess=[w]\nType=[w]\nState=[w]\nAction=[w]\nFileID=[W]\nRes=[w]\n",
699 	  NULL, NULL } },
700 
701     { SMBreadX, "SMBreadX", FLG_CHAIN,
702 	{ "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nCountLeft=[d]\n",
703 	  NULL,
704 	  "Com2=[w]\nOff2=[d]\nRemaining=[d]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\nRes=([w,w,w,w])\n",
705 	  NULL, NULL } },
706 
707     { SMBwriteX, "SMBwriteX", FLG_CHAIN,
708 	{ "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nCountLeft=[d]\nRes=[w]\nDataSize=[d]\nDataOff=[d]\n",
709 	  NULL,
710 	  "Com2=[w]\nOff2=[d]\nCount=[d]\nRemaining=[d]\nRes=[W]\n",
711 	  NULL, NULL } },
712 
713     { SMBffirst, "SMBffirst", 0,
714 	{ "Count=[d]\nAttrib=[A]\n",
715 	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
716 	  "Count=[d]\n",
717 	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
718 	  NULL } },
719 
720     { SMBfunique, "SMBfunique", 0,
721 	{ "Count=[d]\nAttrib=[A]\n",
722 	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
723 	  "Count=[d]\n",
724 	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
725 	  NULL } },
726 
727     { SMBfclose, "SMBfclose", 0,
728 	{ "Count=[d]\nAttrib=[A]\n",
729 	  "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
730 	  "Count=[d]\n",
731 	  "BlkType=[B]\nBlkLen=[d]\n*\nRes1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\nAttrib=[a]\nTime=[T1]Size=[D]\nName=[s13]\n",
732 	  NULL } },
733 
734     { SMBfindnclose, "SMBfindnclose", 0,
735 	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },
736 
737     { SMBfindclose, "SMBfindclose", 0,
738 	{ "Handle=[d]\n", NULL, NULL, NULL, NULL } },
739 
740     { SMBsends, "SMBsends", 0,
741 	{ NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },
742 
743     { SMBsendstrt, "SMBsendstrt", 0,
744 	{ NULL, "Source=[Z]\nDest=[Z]\n", "GroupID=[d]\n", NULL, NULL } },
745 
746     { SMBsendend, "SMBsendend", 0,
747 	{ "GroupID=[d]\n", NULL, NULL, NULL, NULL } },
748 
749     { SMBsendtxt, "SMBsendtxt", 0,
750 	{ "GroupID=[d]\n", NULL, NULL, NULL, NULL } },
751 
752     { SMBsendb, "SMBsendb", 0,
753 	{ NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },
754 
755     { SMBfwdname, "SMBfwdname", 0, DEFDESCRIPT },
756     { SMBcancelf, "SMBcancelf", 0, DEFDESCRIPT },
757     { SMBgetmac, "SMBgetmac", 0, DEFDESCRIPT },
758 
759     { SMBnegprot, "SMBnegprot", 0,
760 	{ NULL, NULL, NULL, NULL, print_negprot } },
761 
762     { SMBsesssetupX, "SMBsesssetupX", FLG_CHAIN,
763 	{ NULL, NULL, NULL, NULL, print_sesssetup } },
764 
765     { SMBtconX, "SMBtconX", FLG_CHAIN,
766 	{ "Com2=[w]\nOff2=[d]\nFlags=[w]\nPassLen=[d]\nPasswd&Path&Device=\n",
767 	  NULL, "Com2=[w]\nOff2=[d]\n", "ServiceType=[R]\n", NULL } },
768 
769     { SMBlockingX, "SMBlockingX", FLG_CHAIN,
770 	{ NULL, NULL, NULL, NULL, print_lockingandx } },
771 
772     { SMBtrans2, "SMBtrans2", 0, { NULL, NULL, NULL, NULL, print_trans2 } },
773 
774     { SMBtranss2, "SMBtranss2", 0, DEFDESCRIPT },
775     { SMBctemp, "SMBctemp", 0, DEFDESCRIPT },
776     { SMBreadBs, "SMBreadBs", 0, DEFDESCRIPT },
777     { SMBtrans, "SMBtrans", 0, { NULL, NULL, NULL, NULL, print_trans } },
778 
779     { SMBnttrans, "SMBnttrans", 0, DEFDESCRIPT },
780     { SMBnttranss, "SMBnttranss", 0, DEFDESCRIPT },
781 
782     { SMBntcreateX, "SMBntcreateX", FLG_CHAIN,
783 	{ "Com2=[w]\nOff2=[d]\nRes=[b]\nNameLen=[ld]\nFlags=[W]\nRootDirectoryFid=[D]\nAccessMask=[W]\nAllocationSize=[L]\nExtFileAttributes=[W]\nShareAccess=[W]\nCreateDisposition=[W]\nCreateOptions=[W]\nImpersonationLevel=[W]\nSecurityFlags=[b]\n",
784 	  "Path=[C]\n",
785 	  "Com2=[w]\nOff2=[d]\nOplockLevel=[b]\nFid=[d]\nCreateAction=[W]\nCreateTime=[T3]LastAccessTime=[T3]LastWriteTime=[T3]ChangeTime=[T3]ExtFileAttributes=[W]\nAllocationSize=[L]\nEndOfFile=[L]\nFileType=[w]\nDeviceState=[w]\nDirectory=[b]\n",
786 	  NULL, NULL } },
787 
788     { SMBntcancel, "SMBntcancel", 0, DEFDESCRIPT },
789 
790     { -1, NULL, 0, DEFDESCRIPT }
791 };
792 
793 
794 /*
795  * print a SMB message
796  */
797 static void
798 print_smb(netdissect_options *ndo,
799           const u_char *buf, const u_char *maxbuf)
800 {
801     uint16_t flags2;
802     int nterrcodes;
803     int command;
804     uint32_t nterror;
805     const u_char *words, *maxwords, *data;
806     const struct smbfns *fn;
807     const char *fmt_smbheader =
808         "[P4]SMB Command   =  [B]\nError class   =  [BP1]\nError code    =  [d]\nFlags1        =  [B]\nFlags2        =  [B][P13]\nTree ID       =  [d]\nProc ID       =  [d]\nUID           =  [d]\nMID           =  [d]\nWord Count    =  [b]\n";
809     int smboffset;
810 
811     ND_TCHECK(buf[9]);
812     request = (buf[9] & 0x80) ? 0 : 1;
813     flags2 = EXTRACT_LE_16BITS(&buf[10]);
814     unicodestr = flags2 & 0x8000;
815     nterrcodes = flags2 & 0x4000;
816     startbuf = buf;
817 
818     command = buf[4];
819 
820     fn = smbfind(command, smb_fns);
821 
822     if (ndo->ndo_vflag > 1)
823 	ND_PRINT((ndo, "\n"));
824 
825     ND_PRINT((ndo, "SMB PACKET: %s (%s)\n", fn->name, request ? "REQUEST" : "REPLY"));
826 
827     if (ndo->ndo_vflag < 2)
828 	return;
829 
830     /* print out the header */
831     smb_fdata(ndo, buf, fmt_smbheader, buf + 33, unicodestr);
832 
833     if (nterrcodes) {
834     	nterror = EXTRACT_LE_32BITS(&buf[5]);
835 	if (nterror)
836 	    ND_PRINT((ndo, "NTError = %s\n", nt_errstr(nterror)));
837     } else {
838 	if (buf[5])
839 	    ND_PRINT((ndo, "SMBError = %s\n", smb_errstr(buf[5], EXTRACT_LE_16BITS(&buf[7]))));
840     }
841 
842     smboffset = 32;
843 
844     for (;;) {
845 	const char *f1, *f2;
846 	int wct;
847 	u_int bcc;
848 	int newsmboffset;
849 
850 	words = buf + smboffset;
851 	ND_TCHECK(words[0]);
852 	wct = words[0];
853 	data = words + 1 + wct * 2;
854 	maxwords = min(data, maxbuf);
855 
856 	if (request) {
857 	    f1 = fn->descript.req_f1;
858 	    f2 = fn->descript.req_f2;
859 	} else {
860 	    f1 = fn->descript.rep_f1;
861 	    f2 = fn->descript.rep_f2;
862 	}
863 
864 	if (fn->descript.fn)
865 	    (*fn->descript.fn)(ndo, words, data, buf, maxbuf);
866 	else {
867 	    if (wct) {
868 		if (f1)
869 		    smb_fdata(ndo, words + 1, f1, words + 1 + wct * 2, unicodestr);
870 		else {
871 		    int i;
872 		    int v;
873 
874 		    for (i = 0; &words[1 + 2 * i] < maxwords; i++) {
875 			ND_TCHECK2(words[1 + 2 * i], 2);
876 			v = EXTRACT_LE_16BITS(words + 1 + 2 * i);
877 			ND_PRINT((ndo, "smb_vwv[%d]=%d (0x%X)\n", i, v, v));
878 		    }
879 		}
880 	    }
881 
882 	    ND_TCHECK2(*data, 2);
883 	    bcc = EXTRACT_LE_16BITS(data);
884 	    ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
885 	    if (f2) {
886 		if (bcc > 0)
887 		    smb_fdata(ndo, data + 2, f2, data + 2 + bcc, unicodestr);
888 	    } else {
889 		if (bcc > 0) {
890 		    ND_PRINT((ndo, "smb_buf[]=\n"));
891 		    print_data(ndo, data + 2, min(bcc, PTR_DIFF(maxbuf, data + 2)));
892 		}
893 	    }
894 	}
895 
896 	if ((fn->flags & FLG_CHAIN) == 0)
897 	    break;
898 	if (wct == 0)
899 	    break;
900 	ND_TCHECK(words[1]);
901 	command = words[1];
902 	if (command == 0xFF)
903 	    break;
904 	ND_TCHECK2(words[3], 2);
905 	newsmboffset = EXTRACT_LE_16BITS(words + 3);
906 
907 	fn = smbfind(command, smb_fns);
908 
909 	ND_PRINT((ndo, "\nSMB PACKET: %s (%s) (CHAINED)\n",
910 	    fn->name, request ? "REQUEST" : "REPLY"));
911 	if (newsmboffset <= smboffset) {
912 	    ND_PRINT((ndo, "Bad andX offset: %u <= %u\n", newsmboffset, smboffset));
913 	    break;
914 	}
915 	smboffset = newsmboffset;
916     }
917 
918     ND_PRINT((ndo, "\n"));
919     return;
920 trunc:
921     ND_PRINT((ndo, "%s", tstr));
922 }
923 
924 
925 /*
926  * print a NBT packet received across tcp on port 139
927  */
928 void
929 nbt_tcp_print(netdissect_options *ndo,
930               const u_char *data, int length)
931 {
932     int caplen;
933     int type;
934     u_int nbt_len;
935     const u_char *maxbuf;
936 
937     if (length < 4)
938 	goto trunc;
939     if (ndo->ndo_snapend < data)
940 	goto trunc;
941     caplen = ndo->ndo_snapend - data;
942     if (caplen < 4)
943 	goto trunc;
944     maxbuf = data + caplen;
945     type = data[0];
946     nbt_len = EXTRACT_16BITS(data + 2);
947     length -= 4;
948     caplen -= 4;
949 
950     startbuf = data;
951 
952     if (ndo->ndo_vflag < 2) {
953 	ND_PRINT((ndo, " NBT Session Packet: "));
954 	switch (type) {
955 	case 0x00:
956 	    ND_PRINT((ndo, "Session Message"));
957 	    break;
958 
959 	case 0x81:
960 	    ND_PRINT((ndo, "Session Request"));
961 	    break;
962 
963 	case 0x82:
964 	    ND_PRINT((ndo, "Session Granted"));
965 	    break;
966 
967 	case 0x83:
968 	  {
969 	    int ecode;
970 
971 	    if (nbt_len < 4)
972 		goto trunc;
973 	    if (length < 4)
974 		goto trunc;
975 	    if (caplen < 4)
976 		goto trunc;
977 	    ecode = data[4];
978 
979 	    ND_PRINT((ndo, "Session Reject, "));
980 	    switch (ecode) {
981 	    case 0x80:
982 		ND_PRINT((ndo, "Not listening on called name"));
983 		break;
984 	    case 0x81:
985 		ND_PRINT((ndo, "Not listening for calling name"));
986 		break;
987 	    case 0x82:
988 		ND_PRINT((ndo, "Called name not present"));
989 		break;
990 	    case 0x83:
991 		ND_PRINT((ndo, "Called name present, but insufficient resources"));
992 		break;
993 	    default:
994 		ND_PRINT((ndo, "Unspecified error 0x%X", ecode));
995 		break;
996 	    }
997 	  }
998 	    break;
999 
1000 	case 0x85:
1001 	    ND_PRINT((ndo, "Session Keepalive"));
1002 	    break;
1003 
1004 	default:
1005 	    data = smb_fdata(ndo, data, "Unknown packet type [rB]", maxbuf, 0);
1006 	    break;
1007 	}
1008     } else {
1009 	ND_PRINT((ndo, "\n>>> NBT Session Packet\n"));
1010 	switch (type) {
1011 	case 0x00:
1012 	    data = smb_fdata(ndo, data, "[P1]NBT Session Message\nFlags=[B]\nLength=[rd]\n",
1013 		data + 4, 0);
1014 	    if (data == NULL)
1015 		break;
1016 	    if (nbt_len >= 4 && caplen >= 4 && memcmp(data,"\377SMB",4) == 0) {
1017 		if ((int)nbt_len > caplen) {
1018 		    if ((int)nbt_len > length)
1019 			ND_PRINT((ndo, "WARNING: Packet is continued in later TCP segments\n"));
1020 		    else
1021 			ND_PRINT((ndo, "WARNING: Short packet. Try increasing the snap length by %d\n",
1022 			    nbt_len - caplen));
1023 		}
1024 		print_smb(ndo, data, maxbuf > data + nbt_len ? data + nbt_len : maxbuf);
1025 	    } else
1026 		ND_PRINT((ndo, "Session packet:(raw data or continuation?)\n"));
1027 	    break;
1028 
1029 	case 0x81:
1030 	    data = smb_fdata(ndo, data,
1031 		"[P1]NBT Session Request\nFlags=[B]\nLength=[rd]\nDestination=[n1]\nSource=[n1]\n",
1032 		maxbuf, 0);
1033 	    break;
1034 
1035 	case 0x82:
1036 	    data = smb_fdata(ndo, data, "[P1]NBT Session Granted\nFlags=[B]\nLength=[rd]\n", maxbuf, 0);
1037 	    break;
1038 
1039 	case 0x83:
1040 	  {
1041 	    const u_char *origdata;
1042 	    int ecode;
1043 
1044 	    origdata = data;
1045 	    data = smb_fdata(ndo, data, "[P1]NBT SessionReject\nFlags=[B]\nLength=[rd]\nReason=[B]\n",
1046 		maxbuf, 0);
1047 	    if (data == NULL)
1048 		break;
1049 	    if (nbt_len >= 1 && caplen >= 1) {
1050 		ecode = origdata[4];
1051 		switch (ecode) {
1052 		case 0x80:
1053 		    ND_PRINT((ndo, "Not listening on called name\n"));
1054 		    break;
1055 		case 0x81:
1056 		    ND_PRINT((ndo, "Not listening for calling name\n"));
1057 		    break;
1058 		case 0x82:
1059 		    ND_PRINT((ndo, "Called name not present\n"));
1060 		    break;
1061 		case 0x83:
1062 		    ND_PRINT((ndo, "Called name present, but insufficient resources\n"));
1063 		    break;
1064 		default:
1065 		    ND_PRINT((ndo, "Unspecified error 0x%X\n", ecode));
1066 		    break;
1067 		}
1068 	    }
1069 	  }
1070 	    break;
1071 
1072 	case 0x85:
1073 	    data = smb_fdata(ndo, data, "[P1]NBT Session Keepalive\nFlags=[B]\nLength=[rd]\n", maxbuf, 0);
1074 	    break;
1075 
1076 	default:
1077 	    data = smb_fdata(ndo, data, "NBT - Unknown packet type\nType=[B]\n", maxbuf, 0);
1078 	    break;
1079 	}
1080 	ND_PRINT((ndo, "\n"));
1081     }
1082     return;
1083 trunc:
1084     ND_PRINT((ndo, "%s", tstr));
1085 }
1086 
1087 static const struct tok opcode_str[] = {
1088 	{ 0,  "QUERY"                   },
1089 	{ 5,  "REGISTRATION"            },
1090 	{ 6,  "RELEASE"                 },
1091 	{ 7,  "WACK"                    },
1092 	{ 8,  "REFRESH(8)"              },
1093 	{ 9,  "REFRESH"                 },
1094 	{ 15, "MULTIHOMED REGISTRATION" },
1095 	{ 0, NULL }
1096 };
1097 
1098 /*
1099  * print a NBT packet received across udp on port 137
1100  */
1101 void
1102 nbt_udp137_print(netdissect_options *ndo,
1103                  const u_char *data, int length)
1104 {
1105     const u_char *maxbuf = data + length;
1106     int name_trn_id, response, opcode, nm_flags, rcode;
1107     int qdcount, ancount, nscount, arcount;
1108     const u_char *p;
1109     int total, i;
1110 
1111     ND_TCHECK2(data[10], 2);
1112     name_trn_id = EXTRACT_16BITS(data);
1113     response = (data[2] >> 7);
1114     opcode = (data[2] >> 3) & 0xF;
1115     nm_flags = ((data[2] & 0x7) << 4) + (data[3] >> 4);
1116     rcode = data[3] & 0xF;
1117     qdcount = EXTRACT_16BITS(data + 4);
1118     ancount = EXTRACT_16BITS(data + 6);
1119     nscount = EXTRACT_16BITS(data + 8);
1120     arcount = EXTRACT_16BITS(data + 10);
1121     startbuf = data;
1122 
1123     if (maxbuf <= data)
1124 	return;
1125 
1126     if (ndo->ndo_vflag > 1)
1127 	ND_PRINT((ndo, "\n>>> "));
1128 
1129     ND_PRINT((ndo, "NBT UDP PACKET(137): %s", tok2str(opcode_str, "OPUNKNOWN", opcode)));
1130     if (response) {
1131         ND_PRINT((ndo, "; %s", rcode ? "NEGATIVE" : "POSITIVE"));
1132     }
1133     ND_PRINT((ndo, "; %s; %s", response ? "RESPONSE" : "REQUEST",
1134               (nm_flags & 1) ? "BROADCAST" : "UNICAST"));
1135 
1136     if (ndo->ndo_vflag < 2)
1137 	return;
1138 
1139     ND_PRINT((ndo, "\nTrnID=0x%X\nOpCode=%d\nNmFlags=0x%X\nRcode=%d\nQueryCount=%d\nAnswerCount=%d\nAuthorityCount=%d\nAddressRecCount=%d\n",
1140 	name_trn_id, opcode, nm_flags, rcode, qdcount, ancount, nscount,
1141 	arcount));
1142 
1143     p = data + 12;
1144 
1145     total = ancount + nscount + arcount;
1146 
1147     if (qdcount > 100 || total > 100) {
1148 	ND_PRINT((ndo, "Corrupt packet??\n"));
1149 	return;
1150     }
1151 
1152     if (qdcount) {
1153 	ND_PRINT((ndo, "QuestionRecords:\n"));
1154 	for (i = 0; i < qdcount; i++) {
1155 	    p = smb_fdata(ndo, p,
1156 		"|Name=[n1]\nQuestionType=[rw]\nQuestionClass=[rw]\n#",
1157 		maxbuf, 0);
1158 	    if (p == NULL)
1159 		goto out;
1160 	}
1161     }
1162 
1163     if (total) {
1164 	ND_PRINT((ndo, "\nResourceRecords:\n"));
1165 	for (i = 0; i < total; i++) {
1166 	    int rdlen;
1167 	    int restype;
1168 
1169 	    p = smb_fdata(ndo, p, "Name=[n1]\n#", maxbuf, 0);
1170 	    if (p == NULL)
1171 		goto out;
1172 	    restype = EXTRACT_16BITS(p);
1173 	    p = smb_fdata(ndo, p, "ResType=[rw]\nResClass=[rw]\nTTL=[rD]\n", p + 8, 0);
1174 	    if (p == NULL)
1175 		goto out;
1176 	    rdlen = EXTRACT_16BITS(p);
1177 	    ND_PRINT((ndo, "ResourceLength=%d\nResourceData=\n", rdlen));
1178 	    p += 2;
1179 	    if (rdlen == 6) {
1180 		p = smb_fdata(ndo, p, "AddrType=[rw]\nAddress=[b.b.b.b]\n", p + rdlen, 0);
1181 		if (p == NULL)
1182 		    goto out;
1183 	    } else {
1184 		if (restype == 0x21) {
1185 		    int numnames;
1186 
1187 		    ND_TCHECK(*p);
1188 		    numnames = p[0];
1189 		    p = smb_fdata(ndo, p, "NumNames=[B]\n", p + 1, 0);
1190 		    if (p == NULL)
1191 			goto out;
1192 		    while (numnames--) {
1193 			p = smb_fdata(ndo, p, "Name=[n2]\t#", maxbuf, 0);
1194 			if (p == NULL)
1195 			    goto out;
1196 			ND_TCHECK(*p);
1197 			if (p[0] & 0x80)
1198 			    ND_PRINT((ndo, "<GROUP> "));
1199 			switch (p[0] & 0x60) {
1200 			case 0x00: ND_PRINT((ndo, "B ")); break;
1201 			case 0x20: ND_PRINT((ndo, "P ")); break;
1202 			case 0x40: ND_PRINT((ndo, "M ")); break;
1203 			case 0x60: ND_PRINT((ndo, "_ ")); break;
1204 			}
1205 			if (p[0] & 0x10)
1206 			    ND_PRINT((ndo, "<DEREGISTERING> "));
1207 			if (p[0] & 0x08)
1208 			    ND_PRINT((ndo, "<CONFLICT> "));
1209 			if (p[0] & 0x04)
1210 			    ND_PRINT((ndo, "<ACTIVE> "));
1211 			if (p[0] & 0x02)
1212 			    ND_PRINT((ndo, "<PERMANENT> "));
1213 			ND_PRINT((ndo, "\n"));
1214 			p += 2;
1215 		    }
1216 		} else {
1217 		    print_data(ndo, p, min(rdlen, length - (p - data)));
1218 		    p += rdlen;
1219 		}
1220 	    }
1221 	}
1222     }
1223 
1224     if (p < maxbuf)
1225 	smb_fdata(ndo, p, "AdditionalData:\n", maxbuf, 0);
1226 
1227 out:
1228     ND_PRINT((ndo, "\n"));
1229     return;
1230 trunc:
1231     ND_PRINT((ndo, "%s", tstr));
1232 }
1233 
1234 /*
1235  * Print an SMB-over-TCP packet received across tcp on port 445
1236  */
1237 void
1238 smb_tcp_print(netdissect_options *ndo,
1239               const u_char * data, int length)
1240 {
1241     int caplen;
1242     u_int smb_len;
1243     const u_char *maxbuf;
1244 
1245     if (length < 4)
1246 	goto trunc;
1247     if (ndo->ndo_snapend < data)
1248 	goto trunc;
1249     caplen = ndo->ndo_snapend - data;
1250     if (caplen < 4)
1251 	goto trunc;
1252     maxbuf = data + caplen;
1253     smb_len = EXTRACT_24BITS(data + 1);
1254     length -= 4;
1255     caplen -= 4;
1256 
1257     startbuf = data;
1258     data += 4;
1259 
1260     if (smb_len >= 4 && caplen >= 4 && memcmp(data,"\377SMB",4) == 0) {
1261 	if ((int)smb_len > caplen) {
1262 	    if ((int)smb_len > length)
1263 		ND_PRINT((ndo, " WARNING: Packet is continued in later TCP segments\n"));
1264 	    else
1265 		ND_PRINT((ndo, " WARNING: Short packet. Try increasing the snap length by %d\n",
1266 		    smb_len - caplen));
1267 	} else
1268 	    ND_PRINT((ndo, " "));
1269 	print_smb(ndo, data, maxbuf > data + smb_len ? data + smb_len : maxbuf);
1270     } else
1271 	ND_PRINT((ndo, " SMB-over-TCP packet:(raw data or continuation?)\n"));
1272     return;
1273 trunc:
1274     ND_PRINT((ndo, "%s", tstr));
1275 }
1276 
1277 /*
1278  * print a NBT packet received across udp on port 138
1279  */
1280 void
1281 nbt_udp138_print(netdissect_options *ndo,
1282                  const u_char *data, int length)
1283 {
1284     const u_char *maxbuf = data + length;
1285 
1286     if (maxbuf > ndo->ndo_snapend)
1287 	maxbuf = ndo->ndo_snapend;
1288     if (maxbuf <= data)
1289 	return;
1290     startbuf = data;
1291 
1292     if (ndo->ndo_vflag < 2) {
1293 	ND_PRINT((ndo, "NBT UDP PACKET(138)"));
1294 	return;
1295     }
1296 
1297     data = smb_fdata(ndo, data,
1298 	"\n>>> NBT UDP PACKET(138) Res=[rw] ID=[rw] IP=[b.b.b.b] Port=[rd] Length=[rd] Res2=[rw]\nSourceName=[n1]\nDestName=[n1]\n#",
1299 	maxbuf, 0);
1300 
1301     if (data != NULL) {
1302 	/* If there isn't enough data for "\377SMB", don't check for it. */
1303 	if (&data[3] >= maxbuf)
1304 	    goto out;
1305 
1306 	if (memcmp(data, "\377SMB",4) == 0)
1307 	    print_smb(ndo, data, maxbuf);
1308     }
1309 out:
1310     ND_PRINT((ndo, "\n"));
1311 }
1312 
1313 
1314 /*
1315    print netbeui frames
1316 */
1317 struct nbf_strings {
1318 	const char	*name;
1319 	const char	*nonverbose;
1320 	const char	*verbose;
1321 } nbf_strings[0x20] = {
1322 	{ "Add Group Name Query", ", [P23]Name to add=[n2]#",
1323 	  "[P5]ResponseCorrelator=[w]\n[P16]Name to add=[n2]\n" },
1324 	{ "Add Name Query", ", [P23]Name to add=[n2]#",
1325 	  "[P5]ResponseCorrelator=[w]\n[P16]Name to add=[n2]\n" },
1326 	{ "Name In Conflict", NULL, NULL },
1327 	{ "Status Query", NULL, NULL },
1328 	{ NULL, NULL, NULL },	/* not used */
1329 	{ NULL, NULL, NULL },	/* not used */
1330 	{ NULL, NULL, NULL },	/* not used */
1331 	{ "Terminate Trace", NULL, NULL },
1332 	{ "Datagram", NULL,
1333 	  "[P7]Destination=[n2]\nSource=[n2]\n" },
1334 	{ "Broadcast Datagram", NULL,
1335 	  "[P7]Destination=[n2]\nSource=[n2]\n" },
1336 	{ "Name Query", ", [P7]Name=[n2]#",
1337 	  "[P1]SessionNumber=[B]\nNameType=[B][P2]\nResponseCorrelator=[w]\nName=[n2]\nName of sender=[n2]\n" },
1338 	{ NULL, NULL, NULL },	/* not used */
1339 	{ NULL, NULL, NULL },	/* not used */
1340 	{ "Add Name Response", ", [P1]GroupName=[w] [P4]Destination=[n2] Source=[n2]#",
1341 	  "AddNameInProcess=[B]\nGroupName=[w]\nTransmitCorrelator=[w][P2]\nDestination=[n2]\nSource=[n2]\n" },
1342 	{ "Name Recognized", NULL,
1343 	  "[P1]Data2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nDestination=[n2]\nSource=[n2]\n" },
1344 	{ "Status Response", NULL, NULL },
1345 	{ NULL, NULL, NULL },	/* not used */
1346 	{ NULL, NULL, NULL },	/* not used */
1347 	{ NULL, NULL, NULL },	/* not used */
1348 	{ "Terminate Trace", NULL, NULL },
1349 	{ "Data Ack", NULL,
1350 	  "[P3]TransmitCorrelator=[w][P2]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1351 	{ "Data First/Middle", NULL,
1352 	  "Flags=[{RECEIVE_CONTINUE|NO_ACK||PIGGYBACK_ACK_INCLUDED|}]\nResyncIndicator=[w][P2]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1353 	{ "Data Only/Last", NULL,
1354 	  "Flags=[{|NO_ACK|PIGGYBACK_ACK_ALLOWED|PIGGYBACK_ACK_INCLUDED|}]\nResyncIndicator=[w][P2]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1355 	{ "Session Confirm", NULL,
1356 	  "Data1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1357 	{ "Session End", NULL,
1358 	  "[P1]Data2=[w][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1359 	{ "Session Initialize", NULL,
1360 	  "Data1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1361 	{ "No Receive", NULL,
1362 	  "Flags=[{|SEND_NO_ACK}]\nDataBytesAccepted=[b][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1363 	{ "Receive Outstanding", NULL,
1364 	  "[P1]DataBytesAccepted=[b][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1365 	{ "Receive Continue", NULL,
1366 	  "[P2]TransmitCorrelator=[w]\n[P2]RemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1367 	{ NULL, NULL, NULL },	/* not used */
1368 	{ NULL, NULL, NULL },	/* not used */
1369 	{ "Session Alive", NULL, NULL }
1370 };
1371 
1372 void
1373 netbeui_print(netdissect_options *ndo,
1374               u_short control, const u_char *data, int length)
1375 {
1376     const u_char *maxbuf = data + length;
1377     int len;
1378     int command;
1379     const u_char *data2;
1380     int is_truncated = 0;
1381 
1382     if (maxbuf > ndo->ndo_snapend)
1383 	maxbuf = ndo->ndo_snapend;
1384     ND_TCHECK(data[4]);
1385     len = EXTRACT_LE_16BITS(data);
1386     command = data[4];
1387     data2 = data + len;
1388     if (data2 >= maxbuf) {
1389 	data2 = maxbuf;
1390 	is_truncated = 1;
1391     }
1392 
1393     startbuf = data;
1394 
1395     if (ndo->ndo_vflag < 2) {
1396 	ND_PRINT((ndo, "NBF Packet: "));
1397 	data = smb_fdata(ndo, data, "[P5]#", maxbuf, 0);
1398     } else {
1399 	ND_PRINT((ndo, "\n>>> NBF Packet\nType=0x%X ", control));
1400 	data = smb_fdata(ndo, data, "Length=[d] Signature=[w] Command=[B]\n#", maxbuf, 0);
1401     }
1402     if (data == NULL)
1403 	goto out;
1404 
1405     if (command > 0x1f || nbf_strings[command].name == NULL) {
1406 	if (ndo->ndo_vflag < 2)
1407 	    data = smb_fdata(ndo, data, "Unknown NBF Command#", data2, 0);
1408 	else
1409 	    data = smb_fdata(ndo, data, "Unknown NBF Command\n", data2, 0);
1410     } else {
1411 	if (ndo->ndo_vflag < 2) {
1412 	    ND_PRINT((ndo, "%s", nbf_strings[command].name));
1413 	    if (nbf_strings[command].nonverbose != NULL)
1414 		data = smb_fdata(ndo, data, nbf_strings[command].nonverbose, data2, 0);
1415 	} else {
1416 	    ND_PRINT((ndo, "%s:\n", nbf_strings[command].name));
1417 	    if (nbf_strings[command].verbose != NULL)
1418 		data = smb_fdata(ndo, data, nbf_strings[command].verbose, data2, 0);
1419 	    else
1420 		ND_PRINT((ndo, "\n"));
1421 	}
1422     }
1423 
1424     if (ndo->ndo_vflag < 2)
1425 	return;
1426 
1427     if (data == NULL)
1428 	goto out;
1429 
1430     if (is_truncated) {
1431 	/* data2 was past the end of the buffer */
1432 	goto out;
1433     }
1434 
1435     /* If this isn't a command that would contain an SMB message, quit. */
1436     if (command != 0x08 && command != 0x09 && command != 0x15 &&
1437         command != 0x16)
1438 	goto out;
1439 
1440     /* If there isn't enough data for "\377SMB", don't look for it. */
1441     if (&data2[3] >= maxbuf)
1442 	goto out;
1443 
1444     if (memcmp(data2, "\377SMB",4) == 0)
1445 	print_smb(ndo, data2, maxbuf);
1446     else {
1447 	int i;
1448 	for (i = 0; i < 128; i++) {
1449 	    if (&data2[i + 3] >= maxbuf)
1450 		break;
1451 	    if (memcmp(&data2[i], "\377SMB", 4) == 0) {
1452 		ND_PRINT((ndo, "found SMB packet at %d\n", i));
1453 		print_smb(ndo, &data2[i], maxbuf);
1454 		break;
1455 	    }
1456 	}
1457     }
1458 
1459 out:
1460     ND_PRINT((ndo, "\n"));
1461     return;
1462 trunc:
1463     ND_PRINT((ndo, "%s", tstr));
1464 }
1465 
1466 
1467 /*
1468  * print IPX-Netbios frames
1469  */
1470 void
1471 ipx_netbios_print(netdissect_options *ndo,
1472                   const u_char *data, u_int length)
1473 {
1474     /*
1475      * this is a hack till I work out how to parse the rest of the
1476      * NetBIOS-over-IPX stuff
1477      */
1478     int i;
1479     const u_char *maxbuf;
1480 
1481     maxbuf = data + length;
1482     /* Don't go past the end of the captured data in the packet. */
1483     if (maxbuf > ndo->ndo_snapend)
1484 	maxbuf = ndo->ndo_snapend;
1485     startbuf = data;
1486     for (i = 0; i < 128; i++) {
1487 	if (&data[i + 4] > maxbuf)
1488 	    break;
1489 	if (memcmp(&data[i], "\377SMB", 4) == 0) {
1490 	    smb_fdata(ndo, data, "\n>>> IPX transport ", &data[i], 0);
1491 	    print_smb(ndo, &data[i], maxbuf);
1492 	    ND_PRINT((ndo, "\n"));
1493 	    break;
1494 	}
1495     }
1496     if (i == 128)
1497 	smb_fdata(ndo, data, "\n>>> Unknown IPX ", maxbuf, 0);
1498 }
1499