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