The Tcpdump Group git mirrors - tcpdump/blob - print-smb.c

   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 *
  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 *
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
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
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
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
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
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 }