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 /* \summary: SMB/CIFS printer */
  10
  11 #ifdef HAVE_CONFIG_H
  12 #include "config.h"
  13 #endif
  14
  15 #include <netdissect-stdinc.h>
  16
  17 #include <string.h>
  18
  19 #include "netdissect.h"
  20 #include "extract.h"
  21 #include "smb.h"
  22
  23 static const char tstr[] = "[|SMB]";
  24
  25 static int request = 0;
  26 static int unicodestr = 0;
  27
  28 const u_char *startbuf = NULL;
  29
  30 struct smbdescript {
  31     const char *req_f1;
  32     const char *req_f2;
  33     const char *rep_f1;
  34     const char *rep_f2;
  35     void (*fn)(netdissect_options *, const u_char *, const u_char *, const u_char *, const u_char *);
  36 };
  37
  38 struct smbdescriptint {
  39     const char *req_f1;
  40     const char *req_f2;
  41     const char *rep_f1;
  42     const char *rep_f2;
  43     void (*fn)(netdissect_options *, const u_char *, const u_char *, int, int);
  44 };
  45
  46 struct smbfns
  47 {
  48     int id;
  49     const char *name;
  50     int flags;
  51     struct smbdescript descript;
  52 };
  53
  54 struct smbfnsint
  55 {
  56     int id;
  57     const char *name;
  58     int flags;
  59     struct smbdescriptint descript;
  60 };
  61
  62 #define DEFDESCRIPT     { NULL, NULL, NULL, NULL, NULL }
  63
  64 #define FLG_CHAIN       (1 << 0)
  65
  66 static const struct smbfns *
  67 smbfind(int id, const struct smbfns *list)
  68 {
  69     int sindex;
  70
  71     for (sindex = 0; list[sindex].name; sindex++)
  72         if (list[sindex].id == id)
  73             return(&list[sindex]);
  74
  75     return(&list[0]);
  76 }
  77
  78 static const struct smbfnsint *
  79 smbfindint(int id, const struct smbfnsint *list)
  80 {
  81     int sindex;
  82
  83     for (sindex = 0; list[sindex].name; sindex++)
  84         if (list[sindex].id == id)
  85             return(&list[sindex]);
  86
  87     return(&list[0]);
  88 }
  89
  90 static void
  91 trans2_findfirst(netdissect_options *ndo,
  92                  const u_char *param, const u_char *data, int pcnt, int dcnt)
  93 {
  94     const char *fmt;
  95
  96     if (request)
  97         fmt = "Attribute=[A]\nSearchCount=[d]\nFlags=[w]\nLevel=[dP4]\nFile=[S]\n";
  98     else
  99         fmt = "Handle=[w]\nCount=[d]\nEOS=[w]\nEoffset=[d]\nLastNameOfs=[w]\n";
 100
 101     smb_fdata(ndo, param, fmt, param + pcnt, unicodestr);
 102     if (dcnt) {
 103         ND_PRINT((ndo, "data:\n"));
 104         smb_print_data(ndo, data, dcnt);
 105     }
 106 }
 107
 108 static void
 109 trans2_qfsinfo(netdissect_options *ndo,
 110                const u_char *param, const u_char *data, int pcnt, int dcnt)
 111 {
 112     static int level = 0;
 113     const char *fmt="";
 114
 115     if (request) {
 116         ND_TCHECK_2(param);
 117         level = EXTRACT_LE_U_2(param);
 118         fmt = "InfoLevel=[d]\n";
 119         smb_fdata(ndo, param, fmt, param + pcnt, unicodestr);
 120     } else {
 121         switch (level) {
 122         case 1:
 123             fmt = "idFileSystem=[W]\nSectorUnit=[D]\nUnit=[D]\nAvail=[D]\nSectorSize=[d]\n";
 124             break;
 125         case 2:
 126             fmt = "CreationTime=[T2]VolNameLength=[lb]\nVolumeLabel=[c]\n";
 127             break;
 128         case 0x105:
 129             fmt = "Capabilities=[W]\nMaxFileLen=[D]\nVolNameLen=[lD]\nVolume=[C]\n";
 130             break;
 131         default:
 132             fmt = "UnknownLevel\n";
 133             break;
 134         }
 135         smb_fdata(ndo, data, fmt, data + dcnt, unicodestr);
 136     }
 137     if (dcnt) {
 138         ND_PRINT((ndo, "data:\n"));
 139         smb_print_data(ndo, data, dcnt);
 140     }
 141     return;
 142 trunc:
 143     ND_PRINT((ndo, "%s", tstr));
 144 }
 145
 146 static const struct smbfnsint trans2_fns[] = {
 147     { 0, "TRANSACT2_OPEN", 0,
 148         { "Flags2=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]\nOFun=[w]\nSize=[D]\nRes=([w, w, w, w, w])\nPath=[S]",
 149           NULL,
 150           "Handle=[d]\nAttrib=[A]\nTime=[T2]\nSize=[D]\nAccess=[w]\nType=[w]\nState=[w]\nAction=[w]\nInode=[W]\nOffErr=[d]\n|EALength=[d]\n",
 151           NULL, NULL }},
 152     { 1, "TRANSACT2_FINDFIRST", 0,
 153         { NULL, NULL, NULL, NULL, trans2_findfirst }},
 154     { 2, "TRANSACT2_FINDNEXT", 0, DEFDESCRIPT },
 155     { 3, "TRANSACT2_QFSINFO", 0,
 156         { NULL, NULL, NULL, NULL, trans2_qfsinfo }},
 157     { 4, "TRANSACT2_SETFSINFO", 0, DEFDESCRIPT },
 158     { 5, "TRANSACT2_QPATHINFO", 0, DEFDESCRIPT },
 159     { 6, "TRANSACT2_SETPATHINFO", 0, DEFDESCRIPT },
 160     { 7, "TRANSACT2_QFILEINFO", 0, DEFDESCRIPT },
 161     { 8, "TRANSACT2_SETFILEINFO", 0, DEFDESCRIPT },
 162     { 9, "TRANSACT2_FSCTL", 0, DEFDESCRIPT },
 163     { 10, "TRANSACT2_IOCTL", 0, DEFDESCRIPT },
 164     { 11, "TRANSACT2_FINDNOTIFYFIRST", 0, DEFDESCRIPT },
 165     { 12, "TRANSACT2_FINDNOTIFYNEXT", 0, DEFDESCRIPT },
 166     { 13, "TRANSACT2_MKDIR", 0, DEFDESCRIPT },
 167     { -1, NULL, 0, DEFDESCRIPT }
 168 };
 169
 170
 171 static void
 172 print_trans2(netdissect_options *ndo,
 173              const u_char *words, const u_char *dat, const u_char *buf, const u_char *maxbuf)
 174 {
 175     u_int bcc;
 176     static const struct smbfnsint *fn = &trans2_fns[0];
 177     const u_char *data, *param;
 178     const u_char *w = words + 1;
 179     const char *f1 = NULL, *f2 = NULL;
 180     int pcnt, dcnt;
 181
 182     ND_TCHECK(words[0]);
 183     if (request) {
 184         ND_TCHECK_2(w + (14 * 2));
 185         pcnt = EXTRACT_LE_U_2(w + 9 * 2);
 186         param = buf + EXTRACT_LE_U_2(w + 10 * 2);
 187         dcnt = EXTRACT_LE_U_2(w + 11 * 2);
 188         data = buf + EXTRACT_LE_U_2(w + 12 * 2);
 189         fn = smbfindint(EXTRACT_LE_U_2(w + 14 * 2), trans2_fns);
 190     } else {
 191         if (words[0] == 0) {
 192             ND_PRINT((ndo, "%s\n", fn->name));
 193             ND_PRINT((ndo, "Trans2Interim\n"));
 194             return;
 195         }
 196         ND_TCHECK_2(w + (7 * 2));
 197         pcnt = EXTRACT_LE_U_2(w + 3 * 2);
 198         param = buf + EXTRACT_LE_U_2(w + 4 * 2);
 199         dcnt = EXTRACT_LE_U_2(w + 6 * 2);
 200         data = buf + EXTRACT_LE_U_2(w + 7 * 2);
 201     }
 202
 203     ND_PRINT((ndo, "%s param_length=%d data_length=%d\n", fn->name, pcnt, dcnt));
 204
 205     if (request) {
 206         if (words[0] == 8) {
 207             smb_fdata(ndo, words + 1,
 208                 "Trans2Secondary\nTotParam=[d]\nTotData=[d]\nParamCnt=[d]\nParamOff=[d]\nParamDisp=[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nHandle=[d]\n",
 209                 maxbuf, unicodestr);
 210             return;
 211         } else {
 212             smb_fdata(ndo, words + 1,
 213                 "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",
 214                 words + 1 + 14 * 2, unicodestr);
 215         }
 216         f1 = fn->descript.req_f1;
 217         f2 = fn->descript.req_f2;
 218     } else {
 219         smb_fdata(ndo, words + 1,
 220             "TotParam=[d]\nTotData=[d]\nRes1=[w]\nParamCnt=[d]\nParamOff=[d]\nParamDisp[d]\nDataCnt=[d]\nDataOff=[d]\nDataDisp=[d]\nSetupCnt=[b][P1]\n",
 221             words + 1 + 10 * 2, unicodestr);
 222         f1 = fn->descript.rep_f1;
 223         f2 = fn->descript.rep_f2;
 224     }
 225
 226     ND_TCHECK_2(dat);
 227     bcc = EXTRACT_LE_U_2(dat);
 228     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 229     if (fn->descript.fn)
 230         (*fn->descript.fn)(ndo, param, data, pcnt, dcnt);
 231     else {
 232         smb_fdata(ndo, param, f1 ? f1 : "Parameters=\n", param + pcnt, unicodestr);
 233         smb_fdata(ndo, data, f2 ? f2 : "Data=\n", data + dcnt, unicodestr);
 234     }
 235     return;
 236 trunc:
 237     ND_PRINT((ndo, "%s", tstr));
 238 }
 239
 240 static void
 241 print_browse(netdissect_options *ndo,
 242              const u_char *param, int paramlen, const u_char *data, int datalen)
 243 {
 244     const u_char *maxbuf = data + datalen;
 245     int command;
 246
 247     ND_TCHECK(data[0]);
 248     command = data[0];
 249
 250     smb_fdata(ndo, param, "BROWSE PACKET\n|Param ", param+paramlen, unicodestr);
 251
 252     switch (command) {
 253     case 0xF:
 254         data = smb_fdata(ndo, data,
 255             "BROWSE PACKET:\nType=[B] (LocalMasterAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
 256             maxbuf, unicodestr);
 257         break;
 258
 259     case 0x1:
 260         data = smb_fdata(ndo, data,
 261             "BROWSE PACKET:\nType=[B] (HostAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nElectionVersion=[w]\nBrowserConstant=[w]\n",
 262             maxbuf, unicodestr);
 263         break;
 264
 265     case 0x2:
 266         data = smb_fdata(ndo, data,
 267             "BROWSE PACKET:\nType=[B] (AnnouncementRequest)\nFlags=[B]\nReplySystemName=[S]\n",
 268             maxbuf, unicodestr);
 269         break;
 270
 271     case 0xc:
 272         data = smb_fdata(ndo, data,
 273             "BROWSE PACKET:\nType=[B] (WorkgroupAnnouncement)\nUpdateCount=[w]\nRes1=[B]\nAnnounceInterval=[d]\nName=[n2]\nMajorVersion=[B]\nMinorVersion=[B]\nServerType=[W]\nCommentPointer=[W]\nServerName=[S]\n",
 274             maxbuf, unicodestr);
 275         break;
 276
 277     case 0x8:
 278         data = smb_fdata(ndo, data,
 279             "BROWSE PACKET:\nType=[B] (ElectionFrame)\nElectionVersion=[B]\nOSSummary=[W]\nUptime=[(W, W)]\nServerName=[S]\n",
 280             maxbuf, unicodestr);
 281         break;
 282
 283     case 0xb:
 284         data = smb_fdata(ndo, data,
 285             "BROWSE PACKET:\nType=[B] (BecomeBackupBrowser)\nName=[S]\n",
 286             maxbuf, unicodestr);
 287         break;
 288
 289     case 0x9:
 290         data = smb_fdata(ndo, data,
 291             "BROWSE PACKET:\nType=[B] (GetBackupList)\nListCount?=[B]\nToken=[W]\n",
 292             maxbuf, unicodestr);
 293         break;
 294
 295     case 0xa:
 296         data = smb_fdata(ndo, data,
 297             "BROWSE PACKET:\nType=[B] (BackupListResponse)\nServerCount?=[B]\nToken=[W]\n*Name=[S]\n",
 298             maxbuf, unicodestr);
 299         break;
 300
 301     case 0xd:
 302         data = smb_fdata(ndo, data,
 303             "BROWSE PACKET:\nType=[B] (MasterAnnouncement)\nMasterName=[S]\n",
 304             maxbuf, unicodestr);
 305         break;
 306
 307     case 0xe:
 308         data = smb_fdata(ndo, data,
 309             "BROWSE PACKET:\nType=[B] (ResetBrowser)\nOptions=[B]\n", maxbuf, unicodestr);
 310         break;
 311
 312     default:
 313         data = smb_fdata(ndo, data, "Unknown Browser Frame ", maxbuf, unicodestr);
 314         break;
 315     }
 316     return;
 317 trunc:
 318     ND_PRINT((ndo, "%s", tstr));
 319 }
 320
 321
 322 static void
 323 print_ipc(netdissect_options *ndo,
 324           const u_char *param, int paramlen, const u_char *data, int datalen)
 325 {
 326     if (paramlen)
 327         smb_fdata(ndo, param, "Command=[w]\nStr1=[S]\nStr2=[S]\n", param + paramlen,
 328             unicodestr);
 329     if (datalen)
 330         smb_fdata(ndo, data, "IPC ", data + datalen, unicodestr);
 331 }
 332
 333
 334 static void
 335 print_trans(netdissect_options *ndo,
 336             const u_char *words, const u_char *data1, const u_char *buf, const u_char *maxbuf)
 337 {
 338     u_int bcc;
 339     const char *f1, *f2, *f3, *f4;
 340     const u_char *data, *param;
 341     const u_char *w = words + 1;
 342     int datalen, paramlen;
 343
 344     if (request) {
 345         ND_TCHECK_2(w + (12 * 2));
 346         paramlen = EXTRACT_LE_U_2(w + 9 * 2);
 347         param = buf + EXTRACT_LE_U_2(w + 10 * 2);
 348         datalen = EXTRACT_LE_U_2(w + 11 * 2);
 349         data = buf + EXTRACT_LE_U_2(w + 12 * 2);
 350         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";
 351         f2 = "|Name=[S]\n";
 352         f3 = "|Param ";
 353         f4 = "|Data ";
 354     } else {
 355         ND_TCHECK_2(w + (7 * 2));
 356         paramlen = EXTRACT_LE_U_2(w + 3 * 2);
 357         param = buf + EXTRACT_LE_U_2(w + 4 * 2);
 358         datalen = EXTRACT_LE_U_2(w + 6 * 2);
 359         data = buf + EXTRACT_LE_U_2(w + 7 * 2);
 360         f1 = "TotParamCnt=[d] \nTotDataCnt=[d] \nRes1=[d]\nParamCnt=[d] \nParamOff=[d] \nRes2=[d] \nDataCnt=[d] \nDataOff=[d] \nRes3=[d]\nLsetup=[d]\n";
 361         f2 = "|Unknown ";
 362         f3 = "|Param ";
 363         f4 = "|Data ";
 364     }
 365
 366     smb_fdata(ndo, words + 1, f1, min(words + 1 + 2 * words[0], maxbuf),
 367         unicodestr);
 368
 369     ND_TCHECK_2(data1);
 370     bcc = EXTRACT_LE_U_2(data1);
 371     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 372     if (bcc > 0) {
 373         smb_fdata(ndo, data1 + 2, f2, maxbuf - (paramlen + datalen), unicodestr);
 374
 375         if (strcmp((const char *)(data1 + 2), "\\MAILSLOT\\BROWSE") == 0) {
 376             print_browse(ndo, param, paramlen, data, datalen);
 377             return;
 378         }
 379
 380         if (strcmp((const char *)(data1 + 2), "\\PIPE\\LANMAN") == 0) {
 381             print_ipc(ndo, param, paramlen, data, datalen);
 382             return;
 383         }
 384
 385         if (paramlen)
 386             smb_fdata(ndo, param, f3, min(param + paramlen, maxbuf), unicodestr);
 387         if (datalen)
 388             smb_fdata(ndo, data, f4, min(data + datalen, maxbuf), unicodestr);
 389     }
 390     return;
 391 trunc:
 392     ND_PRINT((ndo, "%s", tstr));
 393 }
 394
 395
 396 static void
 397 print_negprot(netdissect_options *ndo,
 398               const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
 399 {
 400     u_int wct, bcc;
 401     const char *f1 = NULL, *f2 = NULL;
 402
 403     ND_TCHECK(words[0]);
 404     wct = words[0];
 405     if (request)
 406         f2 = "*|Dialect=[Y]\n";
 407     else {
 408         if (wct == 1)
 409             f1 = "Core Protocol\nDialectIndex=[d]";
 410         else if (wct == 17)
 411             f1 = "NT1 Protocol\nDialectIndex=[d]\nSecMode=[B]\nMaxMux=[d]\nNumVcs=[d]\nMaxBuffer=[D]\nRawSize=[D]\nSessionKey=[W]\nCapabilities=[W]\nServerTime=[T3]TimeZone=[d]\nCryptKey=";
 412         else if (wct == 13)
 413             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=";
 414     }
 415
 416     if (f1)
 417         smb_fdata(ndo, words + 1, f1, min(words + 1 + wct * 2, maxbuf),
 418             unicodestr);
 419     else
 420         smb_print_data(ndo, words + 1, min(wct * 2, PTR_DIFF(maxbuf, words + 1)));
 421
 422     ND_TCHECK_2(data);
 423     bcc = EXTRACT_LE_U_2(data);
 424     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 425     if (bcc > 0) {
 426         if (f2)
 427             smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_U_2(data),
 428                                              maxbuf), unicodestr);
 429         else
 430             smb_print_data(ndo, data + 2,
 431                            min(EXTRACT_LE_U_2(data), PTR_DIFF(maxbuf, data + 2)));
 432     }
 433     return;
 434 trunc:
 435     ND_PRINT((ndo, "%s", tstr));
 436 }
 437
 438 static void
 439 print_sesssetup(netdissect_options *ndo,
 440                 const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
 441 {
 442     u_int wct, bcc;
 443     const char *f1 = NULL, *f2 = NULL;
 444
 445     ND_TCHECK(words[0]);
 446     wct = words[0];
 447     if (request) {
 448         if (wct == 10)
 449             f1 = "Com2=[w]\nOff2=[d]\nBufSize=[d]\nMpxMax=[d]\nVcNum=[d]\nSessionKey=[W]\nPassLen=[d]\nCryptLen=[d]\nCryptOff=[d]\nPass&Name=\n";
 450         else
 451             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";
 452     } else {
 453         if (wct == 3) {
 454             f1 = "Com2=[w]\nOff2=[d]\nAction=[w]\n";
 455         } else if (wct == 13) {
 456             f1 = "Com2=[B]\nRes=[B]\nOff2=[d]\nAction=[w]\n";
 457             f2 = "NativeOS=[S]\nNativeLanMan=[S]\nPrimaryDomain=[S]\n";
 458         }
 459     }
 460
 461     if (f1)
 462         smb_fdata(ndo, words + 1, f1, min(words + 1 + wct * 2, maxbuf),
 463             unicodestr);
 464     else
 465         smb_print_data(ndo, words + 1, min(wct * 2, PTR_DIFF(maxbuf, words + 1)));
 466
 467     ND_TCHECK_2(data);
 468     bcc = EXTRACT_LE_U_2(data);
 469     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 470     if (bcc > 0) {
 471         if (f2)
 472             smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_U_2(data),
 473                                              maxbuf), unicodestr);
 474         else
 475             smb_print_data(ndo, data + 2,
 476                            min(EXTRACT_LE_U_2(data), PTR_DIFF(maxbuf, data + 2)));
 477     }
 478     return;
 479 trunc:
 480     ND_PRINT((ndo, "%s", tstr));
 481 }
 482
 483 static void
 484 print_lockingandx(netdissect_options *ndo,
 485                   const u_char *words, const u_char *data, const u_char *buf _U_, const u_char *maxbuf)
 486 {
 487     u_int wct, bcc;
 488     const u_char *maxwords;
 489     const char *f1 = NULL, *f2 = NULL;
 490
 491     ND_TCHECK(words[0]);
 492     wct = words[0];
 493     if (request) {
 494         f1 = "Com2=[w]\nOff2=[d]\nHandle=[d]\nLockType=[w]\nTimeOut=[D]\nUnlockCount=[d]\nLockCount=[d]\n";
 495         ND_TCHECK(words[7]);
 496         if (words[7] & 0x10)
 497             f2 = "*Process=[d]\n[P2]Offset=[M]\nLength=[M]\n";
 498         else
 499             f2 = "*Process=[d]\nOffset=[D]\nLength=[D]\n";
 500     } else {
 501         f1 = "Com2=[w]\nOff2=[d]\n";
 502     }
 503
 504     maxwords = min(words + 1 + wct * 2, maxbuf);
 505     if (wct)
 506         smb_fdata(ndo, words + 1, f1, maxwords, unicodestr);
 507
 508     ND_TCHECK_2(data);
 509     bcc = EXTRACT_LE_U_2(data);
 510     ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 511     if (bcc > 0) {
 512         if (f2)
 513             smb_fdata(ndo, data + 2, f2, min(data + 2 + EXTRACT_LE_U_2(data),
 514                                              maxbuf), unicodestr);
 515         else
 516             smb_print_data(ndo, data + 2,
 517                            min(EXTRACT_LE_U_2(data), PTR_DIFF(maxbuf, data + 2)));
 518     }
 519     return;
 520 trunc:
 521     ND_PRINT((ndo, "%s", tstr));
 522 }
 523
 524
 525 static const struct smbfns smb_fns[] = {
 526     { -1, "SMBunknown", 0, DEFDESCRIPT },
 527
 528     { SMBtcon, "SMBtcon", 0,
 529         { NULL, "Path=[Z]\nPassword=[Z]\nDevice=[Z]\n",
 530           "MaxXmit=[d]\nTreeId=[d]\n", NULL,
 531           NULL } },
 532
 533     { SMBtdis, "SMBtdis", 0, DEFDESCRIPT },
 534     { SMBexit,  "SMBexit", 0, DEFDESCRIPT },
 535     { SMBioctl, "SMBioctl", 0, DEFDESCRIPT },
 536
 537     { SMBecho, "SMBecho", 0,
 538         { "ReverbCount=[d]\n", NULL,
 539           "SequenceNum=[d]\n", NULL,
 540           NULL } },
 541
 542     { SMBulogoffX, "SMBulogoffX", FLG_CHAIN, DEFDESCRIPT },
 543
 544     { SMBgetatr, "SMBgetatr", 0,
 545         { NULL, "Path=[Z]\n",
 546           "Attribute=[A]\nTime=[T2]Size=[D]\nRes=([w,w,w,w,w])\n", NULL,
 547           NULL } },
 548
 549     { SMBsetatr, "SMBsetatr", 0,
 550         { "Attribute=[A]\nTime=[T2]Res=([w,w,w,w,w])\n", "Path=[Z]\n",
 551           NULL, NULL, NULL } },
 552
 553     { SMBchkpth, "SMBchkpth", 0,
 554        { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
 555
 556     { SMBsearch, "SMBsearch", 0,
 557         { "Count=[d]\nAttrib=[A]\n",
 558           "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\nRes2=[W]\n",
 559           "Count=[d]\n",
 560           "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",
 561           NULL } },
 562
 563     { SMBopen, "SMBopen", 0,
 564         { "Mode=[w]\nAttribute=[A]\n", "Path=[Z]\n",
 565           "Handle=[d]\nOAttrib=[A]\nTime=[T2]Size=[D]\nAccess=[w]\n",
 566           NULL, NULL } },
 567
 568     { SMBcreate, "SMBcreate", 0,
 569         { "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },
 570
 571     { SMBmknew, "SMBmknew", 0,
 572         { "Attrib=[A]\nTime=[T2]", "Path=[Z]\n", "Handle=[d]\n", NULL, NULL } },
 573
 574     { SMBunlink, "SMBunlink", 0,
 575         { "Attrib=[A]\n", "Path=[Z]\n", NULL, NULL, NULL } },
 576
 577     { SMBread, "SMBread", 0,
 578         { "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
 579           "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },
 580
 581     { SMBwrite, "SMBwrite", 0,
 582         { "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
 583           "Count=[d]\n", NULL, NULL } },
 584
 585     { SMBclose, "SMBclose", 0,
 586         { "Handle=[d]\nTime=[T2]", NULL, NULL, NULL, NULL } },
 587
 588     { SMBmkdir, "SMBmkdir", 0,
 589         { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
 590
 591     { SMBrmdir, "SMBrmdir", 0,
 592         { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
 593
 594     { SMBdskattr, "SMBdskattr", 0,
 595         { NULL, NULL,
 596           "TotalUnits=[d]\nBlocksPerUnit=[d]\nBlockSize=[d]\nFreeUnits=[d]\nMedia=[w]\n",
 597           NULL, NULL } },
 598
 599     { SMBmv, "SMBmv", 0,
 600         { "Attrib=[A]\n", "OldPath=[Z]\nNewPath=[Z]\n", NULL, NULL, NULL } },
 601
 602     /*
 603      * this is a Pathworks specific call, allowing the
 604      * changing of the root path
 605      */
 606     { pSETDIR, "SMBsetdir", 0, { NULL, "Path=[Z]\n", NULL, NULL, NULL } },
 607
 608     { SMBlseek, "SMBlseek", 0,
 609         { "Handle=[d]\nMode=[w]\nOffset=[D]\n", "Offset=[D]\n", NULL, NULL, NULL } },
 610
 611     { SMBflush, "SMBflush", 0, { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
 612
 613     { SMBsplopen, "SMBsplopen", 0,
 614         { "SetupLen=[d]\nMode=[w]\n", "Ident=[Z]\n", "Handle=[d]\n",
 615           NULL, NULL } },
 616
 617     { SMBsplclose, "SMBsplclose", 0,
 618         { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
 619
 620     { SMBsplretq, "SMBsplretq", 0,
 621         { "MaxCount=[d]\nStartIndex=[d]\n", NULL,
 622           "Count=[d]\nIndex=[d]\n",
 623           "*Time=[T2]Status=[B]\nJobID=[d]\nSize=[D]\nRes=[B]Name=[s16]\n",
 624           NULL } },
 625
 626     { SMBsplwr, "SMBsplwr", 0,
 627         { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
 628
 629     { SMBlock, "SMBlock", 0,
 630         { "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },
 631
 632     { SMBunlock, "SMBunlock", 0,
 633         { "Handle=[d]\nCount=[D]\nOffset=[D]\n", NULL, NULL, NULL, NULL } },
 634
 635     /* CORE+ PROTOCOL FOLLOWS */
 636
 637     { SMBreadbraw, "SMBreadbraw", 0,
 638         { "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[d]\n",
 639           NULL, NULL, NULL, NULL } },
 640
 641     { SMBwritebraw, "SMBwritebraw", 0,
 642         { "Handle=[d]\nTotalCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\n|DataSize=[d]\nDataOff=[d]\n",
 643           NULL, "WriteRawAck", NULL, NULL } },
 644
 645     { SMBwritec, "SMBwritec", 0,
 646         { NULL, NULL, "Count=[d]\n", NULL, NULL } },
 647
 648     { SMBwriteclose, "SMBwriteclose", 0,
 649         { "Handle=[d]\nCount=[d]\nOffset=[D]\nTime=[T2]Res=([w,w,w,w,w,w])",
 650           NULL, "Count=[d]\n", NULL, NULL } },
 651
 652     { SMBlockread, "SMBlockread", 0,
 653         { "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
 654           "Count=[d]\nRes=([w,w,w,w])\n", NULL, NULL } },
 655
 656     { SMBwriteunlock, "SMBwriteunlock", 0,
 657         { "Handle=[d]\nByteCount=[d]\nOffset=[D]\nCountLeft=[d]\n", NULL,
 658           "Count=[d]\n", NULL, NULL } },
 659
 660     { SMBreadBmpx, "SMBreadBmpx", 0,
 661         { "Handle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nRes=[w]\n",
 662           NULL,
 663           "Offset=[D]\nTotCount=[d]\nRemaining=[d]\nRes=([w,w])\nDataSize=[d]\nDataOff=[d]\n",
 664           NULL, NULL } },
 665
 666     { SMBwriteBmpx, "SMBwriteBmpx", 0,
 667         { "Handle=[d]\nTotCount=[d]\nRes=[w]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nRes2=[W]\nDataSize=[d]\nDataOff=[d]\n", NULL,
 668           "Remaining=[d]\n", NULL, NULL } },
 669
 670     { SMBwriteBs, "SMBwriteBs", 0,
 671         { "Handle=[d]\nTotCount=[d]\nOffset=[D]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\n",
 672           NULL, "Count=[d]\n", NULL, NULL } },
 673
 674     { SMBsetattrE, "SMBsetattrE", 0,
 675         { "Handle=[d]\nCreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]", NULL,
 676           NULL, NULL, NULL } },
 677
 678     { SMBgetattrE, "SMBgetattrE", 0,
 679         { "Handle=[d]\n", NULL,
 680           "CreationTime=[T2]AccessTime=[T2]ModifyTime=[T2]Size=[D]\nAllocSize=[D]\nAttribute=[A]\n",
 681           NULL, NULL } },
 682
 683     { SMBtranss, "SMBtranss", 0, DEFDESCRIPT },
 684     { SMBioctls, "SMBioctls", 0, DEFDESCRIPT },
 685
 686     { SMBcopy, "SMBcopy", 0,
 687         { "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
 688           "CopyCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },
 689
 690     { SMBmove, "SMBmove", 0,
 691         { "TreeID2=[d]\nOFun=[w]\nFlags=[w]\n", "Path=[S]\nNewPath=[S]\n",
 692           "MoveCount=[d]\n",  "|ErrStr=[S]\n",  NULL } },
 693
 694     { SMBopenX, "SMBopenX", FLG_CHAIN,
 695         { "Com2=[w]\nOff2=[d]\nFlags=[w]\nMode=[w]\nSearchAttrib=[A]\nAttrib=[A]\nTime=[T2]OFun=[w]\nSize=[D]\nTimeOut=[D]\nRes=[W]\n",
 696           "Path=[S]\n",
 697           "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",
 698           NULL, NULL } },
 699
 700     { SMBreadX, "SMBreadX", FLG_CHAIN,
 701         { "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nMaxCount=[d]\nMinCount=[d]\nTimeOut=[D]\nCountLeft=[d]\n",
 702           NULL,
 703           "Com2=[w]\nOff2=[d]\nRemaining=[d]\nRes=[W]\nDataSize=[d]\nDataOff=[d]\nRes=([w,w,w,w])\n",
 704           NULL, NULL } },
 705
 706     { SMBwriteX, "SMBwriteX", FLG_CHAIN,
 707         { "Com2=[w]\nOff2=[d]\nHandle=[d]\nOffset=[D]\nTimeOut=[D]\nWMode=[w]\nCountLeft=[d]\nRes=[w]\nDataSize=[d]\nDataOff=[d]\n",
 708           NULL,
 709           "Com2=[w]\nOff2=[d]\nCount=[d]\nRemaining=[d]\nRes=[W]\n",
 710           NULL, NULL } },
 711
 712     { SMBffirst, "SMBffirst", 0,
 713         { "Count=[d]\nAttrib=[A]\n",
 714           "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
 715           "Count=[d]\n",
 716           "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",
 717           NULL } },
 718
 719     { SMBfunique, "SMBfunique", 0,
 720         { "Count=[d]\nAttrib=[A]\n",
 721           "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
 722           "Count=[d]\n",
 723           "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",
 724           NULL } },
 725
 726     { SMBfclose, "SMBfclose", 0,
 727         { "Count=[d]\nAttrib=[A]\n",
 728           "Path=[Z]\nBlkType=[B]\nBlkLen=[d]\n|Res1=[B]\nMask=[s11]\nSrv1=[B]\nDirIndex=[d]\nSrv2=[w]\n",
 729           "Count=[d]\n",
 730           "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",
 731           NULL } },
 732
 733     { SMBfindnclose, "SMBfindnclose", 0,
 734         { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
 735
 736     { SMBfindclose, "SMBfindclose", 0,
 737         { "Handle=[d]\n", NULL, NULL, NULL, NULL } },
 738
 739     { SMBsends, "SMBsends", 0,
 740         { NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },
 741
 742     { SMBsendstrt, "SMBsendstrt", 0,
 743         { NULL, "Source=[Z]\nDest=[Z]\n", "GroupID=[d]\n", NULL, NULL } },
 744
 745     { SMBsendend, "SMBsendend", 0,
 746         { "GroupID=[d]\n", NULL, NULL, NULL, NULL } },
 747
 748     { SMBsendtxt, "SMBsendtxt", 0,
 749         { "GroupID=[d]\n", NULL, NULL, NULL, NULL } },
 750
 751     { SMBsendb, "SMBsendb", 0,
 752         { NULL, "Source=[Z]\nDest=[Z]\n", NULL, NULL, NULL } },
 753
 754     { SMBfwdname, "SMBfwdname", 0, DEFDESCRIPT },
 755     { SMBcancelf, "SMBcancelf", 0, DEFDESCRIPT },
 756     { SMBgetmac, "SMBgetmac", 0, DEFDESCRIPT },
 757
 758     { SMBnegprot, "SMBnegprot", 0,
 759         { NULL, NULL, NULL, NULL, print_negprot } },
 760
 761     { SMBsesssetupX, "SMBsesssetupX", FLG_CHAIN,
 762         { NULL, NULL, NULL, NULL, print_sesssetup } },
 763
 764     { SMBtconX, "SMBtconX", FLG_CHAIN,
 765         { "Com2=[w]\nOff2=[d]\nFlags=[w]\nPassLen=[d]\nPasswd&Path&Device=\n",
 766           NULL, "Com2=[w]\nOff2=[d]\n", "ServiceType=[R]\n", NULL } },
 767
 768     { SMBlockingX, "SMBlockingX", FLG_CHAIN,
 769         { NULL, NULL, NULL, NULL, print_lockingandx } },
 770
 771     { SMBtrans2, "SMBtrans2", 0, { NULL, NULL, NULL, NULL, print_trans2 } },
 772
 773     { SMBtranss2, "SMBtranss2", 0, DEFDESCRIPT },
 774     { SMBctemp, "SMBctemp", 0, DEFDESCRIPT },
 775     { SMBreadBs, "SMBreadBs", 0, DEFDESCRIPT },
 776     { SMBtrans, "SMBtrans", 0, { NULL, NULL, NULL, NULL, print_trans } },
 777
 778     { SMBnttrans, "SMBnttrans", 0, DEFDESCRIPT },
 779     { SMBnttranss, "SMBnttranss", 0, DEFDESCRIPT },
 780
 781     { SMBntcreateX, "SMBntcreateX", FLG_CHAIN,
 782         { "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",
 783           "Path=[C]\n",
 784           "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",
 785           NULL, NULL } },
 786
 787     { SMBntcancel, "SMBntcancel", 0, DEFDESCRIPT },
 788
 789     { -1, NULL, 0, DEFDESCRIPT }
 790 };
 791
 792
 793 /*
 794  * print a SMB message
 795  */
 796 static void
 797 print_smb(netdissect_options *ndo,
 798           const u_char *buf, const u_char *maxbuf)
 799 {
 800     uint16_t flags2;
 801     int nterrcodes;
 802     int command;
 803     uint32_t nterror;
 804     const u_char *words, *maxwords, *data;
 805     const struct smbfns *fn;
 806     const char *fmt_smbheader =
 807         "[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";
 808     int smboffset;
 809
 810     ND_TCHECK(buf[9]);
 811     request = (buf[9] & 0x80) ? 0 : 1;
 812     startbuf = buf;
 813
 814     command = buf[4];
 815
 816     fn = smbfind(command, smb_fns);
 817
 818     if (ndo->ndo_vflag > 1)
 819         ND_PRINT((ndo, "\n"));
 820
 821     ND_PRINT((ndo, "SMB PACKET: %s (%s)\n", fn->name, request ? "REQUEST" : "REPLY"));
 822
 823     if (ndo->ndo_vflag < 2)
 824         return;
 825
 826     ND_TCHECK_2(buf + 10);
 827     flags2 = EXTRACT_LE_U_2(buf + 10);
 828     unicodestr = flags2 & 0x8000;
 829     nterrcodes = flags2 & 0x4000;
 830
 831     /* print out the header */
 832     smb_fdata(ndo, buf, fmt_smbheader, buf + 33, unicodestr);
 833
 834     if (nterrcodes) {
 835         nterror = EXTRACT_LE_U_4(buf + 5);
 836         if (nterror)
 837             ND_PRINT((ndo, "NTError = %s\n", nt_errstr(nterror)));
 838     } else {
 839         if (buf[5])
 840             ND_PRINT((ndo, "SMBError = %s\n", smb_errstr(buf[5], EXTRACT_LE_U_2(buf + 7))));
 841     }
 842
 843     smboffset = 32;
 844
 845     for (;;) {
 846         const char *f1, *f2;
 847         int wct;
 848         u_int bcc;
 849         int newsmboffset;
 850
 851         words = buf + smboffset;
 852         ND_TCHECK(words[0]);
 853         wct = words[0];
 854         data = words + 1 + wct * 2;
 855         maxwords = min(data, maxbuf);
 856
 857         if (request) {
 858             f1 = fn->descript.req_f1;
 859             f2 = fn->descript.req_f2;
 860         } else {
 861             f1 = fn->descript.rep_f1;
 862             f2 = fn->descript.rep_f2;
 863         }
 864
 865         if (fn->descript.fn)
 866             (*fn->descript.fn)(ndo, words, data, buf, maxbuf);
 867         else {
 868             if (wct) {
 869                 if (f1)
 870                     smb_fdata(ndo, words + 1, f1, words + 1 + wct * 2, unicodestr);
 871                 else {
 872                     int i;
 873                     int v;
 874
 875                     for (i = 0; &words[1 + 2 * i] < maxwords; i++) {
 876                         ND_TCHECK_2(words + (1 + 2 * i));
 877                         v = EXTRACT_LE_U_2(words + 1 + 2 * i);
 878                         ND_PRINT((ndo, "smb_vwv[%d]=%d (0x%X)\n", i, v, v));
 879                     }
 880                 }
 881             }
 882
 883             ND_TCHECK_2(data);
 884             bcc = EXTRACT_LE_U_2(data);
 885             ND_PRINT((ndo, "smb_bcc=%u\n", bcc));
 886             if (f2) {
 887                 if (bcc > 0)
 888                     smb_fdata(ndo, data + 2, f2, data + 2 + bcc, unicodestr);
 889             } else {
 890                 if (bcc > 0) {
 891                     ND_PRINT((ndo, "smb_buf[]=\n"));
 892                     smb_print_data(ndo, data + 2, min(bcc, PTR_DIFF(maxbuf, data + 2)));
 893                 }
 894             }
 895         }
 896
 897         if ((fn->flags & FLG_CHAIN) == 0)
 898             break;
 899         if (wct == 0)
 900             break;
 901         ND_TCHECK(words[1]);
 902         command = words[1];
 903         if (command == 0xFF)
 904             break;
 905         ND_TCHECK_2(words + 3);
 906         newsmboffset = EXTRACT_LE_U_2(words + 3);
 907
 908         fn = smbfind(command, smb_fns);
 909
 910         ND_PRINT((ndo, "\nSMB PACKET: %s (%s) (CHAINED)\n",
 911             fn->name, request ? "REQUEST" : "REPLY"));
 912         if (newsmboffset <= smboffset) {
 913             ND_PRINT((ndo, "Bad andX offset: %u <= %u\n", newsmboffset, smboffset));
 914             break;
 915         }
 916         smboffset = newsmboffset;
 917     }
 918
 919     ND_PRINT((ndo, "\n"));
 920     return;
 921 trunc:
 922     ND_PRINT((ndo, "%s", tstr));
 923 }
 924
 925
 926 /*
 927  * print a NBT packet received across tcp on port 139
 928  */
 929 void
 930 nbt_tcp_print(netdissect_options *ndo,
 931               const u_char *data, int length)
 932 {
 933     int caplen;
 934     int type;
 935     u_int nbt_len;
 936     const u_char *maxbuf;
 937
 938     if (length < 4)
 939         goto trunc;
 940     if (ndo->ndo_snapend < data)
 941         goto trunc;
 942     caplen = ndo->ndo_snapend - data;
 943     if (caplen < 4)
 944         goto trunc;
 945     maxbuf = data + caplen;
 946     type = data[0];
 947     nbt_len = EXTRACT_BE_U_2(data + 2);
 948     length -= 4;
 949     caplen -= 4;
 950
 951     startbuf = data;
 952
 953     if (ndo->ndo_vflag < 2) {
 954         ND_PRINT((ndo, " NBT Session Packet: "));
 955         switch (type) {
 956         case 0x00:
 957             ND_PRINT((ndo, "Session Message"));
 958             break;
 959
 960         case 0x81:
 961             ND_PRINT((ndo, "Session Request"));
 962             break;
 963
 964         case 0x82:
 965             ND_PRINT((ndo, "Session Granted"));
 966             break;
 967
 968         case 0x83:
 969           {
 970             int ecode;
 971
 972             if (nbt_len < 4)
 973                 goto trunc;
 974             if (length < 4)
 975                 goto trunc;
 976             if (caplen < 4)
 977                 goto trunc;
 978             ecode = data[4];
 979
 980             ND_PRINT((ndo, "Session Reject, "));
 981             switch (ecode) {
 982             case 0x80:
 983                 ND_PRINT((ndo, "Not listening on called name"));
 984                 break;
 985             case 0x81:
 986                 ND_PRINT((ndo, "Not listening for calling name"));
 987                 break;
 988             case 0x82:
 989                 ND_PRINT((ndo, "Called name not present"));
 990                 break;
 991             case 0x83:
 992                 ND_PRINT((ndo, "Called name present, but insufficient resources"));
 993                 break;
 994             default:
 995                 ND_PRINT((ndo, "Unspecified error 0x%X", ecode));
 996                 break;
 997             }
 998           }
 999             break;
1000
1001         case 0x85:
1002             ND_PRINT((ndo, "Session Keepalive"));
1003             break;
1004
1005         default:
1006             data = smb_fdata(ndo, data, "Unknown packet type [rB]", maxbuf, 0);
1007             break;
1008         }
1009     } else {
1010         ND_PRINT((ndo, "\n>>> NBT Session Packet\n"));
1011         switch (type) {
1012         case 0x00:
1013             data = smb_fdata(ndo, data, "[P1]NBT Session Message\nFlags=[B]\nLength=[rd]\n",
1014                 data + 4, 0);
1015             if (data == NULL)
1016                 break;
1017             if (nbt_len >= 4 && caplen >= 4 && memcmp(data,"\377SMB",4) == 0) {
1018                 if ((int)nbt_len > caplen) {
1019                     if ((int)nbt_len > length)
1020                         ND_PRINT((ndo, "WARNING: Packet is continued in later TCP segments\n"));
1021                     else
1022                         ND_PRINT((ndo, "WARNING: Short packet. Try increasing the snap length by %d\n",
1023                             nbt_len - caplen));
1024                 }
1025                 print_smb(ndo, data, maxbuf > data + nbt_len ? data + nbt_len : maxbuf);
1026             } else
1027                 ND_PRINT((ndo, "Session packet:(raw data or continuation?)\n"));
1028             break;
1029
1030         case 0x81:
1031             data = smb_fdata(ndo, data,
1032                 "[P1]NBT Session Request\nFlags=[B]\nLength=[rd]\nDestination=[n1]\nSource=[n1]\n",
1033                 maxbuf, 0);
1034             break;
1035
1036         case 0x82:
1037             data = smb_fdata(ndo, data, "[P1]NBT Session Granted\nFlags=[B]\nLength=[rd]\n", maxbuf, 0);
1038             break;
1039
1040         case 0x83:
1041           {
1042             const u_char *origdata;
1043             int ecode;
1044
1045             origdata = data;
1046             data = smb_fdata(ndo, data, "[P1]NBT SessionReject\nFlags=[B]\nLength=[rd]\nReason=[B]\n",
1047                 maxbuf, 0);
1048             if (data == NULL)
1049                 break;
1050             if (nbt_len >= 1 && caplen >= 1) {
1051                 ecode = origdata[4];
1052                 switch (ecode) {
1053                 case 0x80:
1054                     ND_PRINT((ndo, "Not listening on called name\n"));
1055                     break;
1056                 case 0x81:
1057                     ND_PRINT((ndo, "Not listening for calling name\n"));
1058                     break;
1059                 case 0x82:
1060                     ND_PRINT((ndo, "Called name not present\n"));
1061                     break;
1062                 case 0x83:
1063                     ND_PRINT((ndo, "Called name present, but insufficient resources\n"));
1064                     break;
1065                 default:
1066                     ND_PRINT((ndo, "Unspecified error 0x%X\n", ecode));
1067                     break;
1068                 }
1069             }
1070           }
1071             break;
1072
1073         case 0x85:
1074             data = smb_fdata(ndo, data, "[P1]NBT Session Keepalive\nFlags=[B]\nLength=[rd]\n", maxbuf, 0);
1075             break;
1076
1077         default:
1078             data = smb_fdata(ndo, data, "NBT - Unknown packet type\nType=[B]\n", maxbuf, 0);
1079             break;
1080         }
1081         ND_PRINT((ndo, "\n"));
1082     }
1083     return;
1084 trunc:
1085     ND_PRINT((ndo, "%s", tstr));
1086 }
1087
1088 static const struct tok opcode_str[] = {
1089         { 0,  "QUERY"                   },
1090         { 5,  "REGISTRATION"            },
1091         { 6,  "RELEASE"                 },
1092         { 7,  "WACK"                    },
1093         { 8,  "REFRESH(8)"              },
1094         { 9,  "REFRESH"                 },
1095         { 15, "MULTIHOMED REGISTRATION" },
1096         { 0, NULL }
1097 };
1098
1099 /*
1100  * print a NBT packet received across udp on port 137
1101  */
1102 void
1103 nbt_udp137_print(netdissect_options *ndo,
1104                  const u_char *data, int length)
1105 {
1106     const u_char *maxbuf = data + length;
1107     int name_trn_id, response, opcode, nm_flags, rcode;
1108     int qdcount, ancount, nscount, arcount;
1109     const u_char *p;
1110     int total, i;
1111
1112     ND_TCHECK_2(data + 10);
1113     name_trn_id = EXTRACT_BE_U_2(data);
1114     response = (data[2] >> 7);
1115     opcode = (data[2] >> 3) & 0xF;
1116     nm_flags = ((data[2] & 0x7) << 4) + (data[3] >> 4);
1117     rcode = data[3] & 0xF;
1118     qdcount = EXTRACT_BE_U_2(data + 4);
1119     ancount = EXTRACT_BE_U_2(data + 6);
1120     nscount = EXTRACT_BE_U_2(data + 8);
1121     arcount = EXTRACT_BE_U_2(data + 10);
1122     startbuf = data;
1123
1124     if (maxbuf <= data)
1125         return;
1126
1127     if (ndo->ndo_vflag > 1)
1128         ND_PRINT((ndo, "\n>>> "));
1129
1130     ND_PRINT((ndo, "NBT UDP PACKET(137): %s", tok2str(opcode_str, "OPUNKNOWN", opcode)));
1131     if (response) {
1132         ND_PRINT((ndo, "; %s", rcode ? "NEGATIVE" : "POSITIVE"));
1133     }
1134     ND_PRINT((ndo, "; %s; %s", response ? "RESPONSE" : "REQUEST",
1135               (nm_flags & 1) ? "BROADCAST" : "UNICAST"));
1136
1137     if (ndo->ndo_vflag < 2)
1138         return;
1139
1140     ND_PRINT((ndo, "\nTrnID=0x%X\nOpCode=%d\nNmFlags=0x%X\nRcode=%d\nQueryCount=%d\nAnswerCount=%d\nAuthorityCount=%d\nAddressRecCount=%d\n",
1141         name_trn_id, opcode, nm_flags, rcode, qdcount, ancount, nscount,
1142         arcount));
1143
1144     p = data + 12;
1145
1146     total = ancount + nscount + arcount;
1147
1148     if (qdcount > 100 || total > 100) {
1149         ND_PRINT((ndo, "Corrupt packet??\n"));
1150         return;
1151     }
1152
1153     if (qdcount) {
1154         ND_PRINT((ndo, "QuestionRecords:\n"));
1155         for (i = 0; i < qdcount; i++) {
1156             p = smb_fdata(ndo, p,
1157                 "|Name=[n1]\nQuestionType=[rw]\nQuestionClass=[rw]\n#",
1158                 maxbuf, 0);
1159             if (p == NULL)
1160                 goto out;
1161         }
1162     }
1163
1164     if (total) {
1165         ND_PRINT((ndo, "\nResourceRecords:\n"));
1166         for (i = 0; i < total; i++) {
1167             int rdlen;
1168             int restype;
1169
1170             p = smb_fdata(ndo, p, "Name=[n1]\n#", maxbuf, 0);
1171             if (p == NULL)
1172                 goto out;
1173             ND_TCHECK_2(p);
1174             restype = EXTRACT_BE_U_2(p);
1175             p = smb_fdata(ndo, p, "ResType=[rw]\nResClass=[rw]\nTTL=[rD]\n", p + 8, 0);
1176             if (p == NULL)
1177                 goto out;
1178             ND_TCHECK_2(p);
1179             rdlen = EXTRACT_BE_U_2(p);
1180             ND_PRINT((ndo, "ResourceLength=%d\nResourceData=\n", rdlen));
1181             p += 2;
1182             if (rdlen == 6) {
1183                 p = smb_fdata(ndo, p, "AddrType=[rw]\nAddress=[b.b.b.b]\n", p + rdlen, 0);
1184                 if (p == NULL)
1185                     goto out;
1186             } else {
1187                 if (restype == 0x21) {
1188                     int numnames;
1189
1190                     ND_TCHECK(*p);
1191                     numnames = p[0];
1192                     p = smb_fdata(ndo, p, "NumNames=[B]\n", p + 1, 0);
1193                     if (p == NULL)
1194                         goto out;
1195                     while (numnames--) {
1196                         p = smb_fdata(ndo, p, "Name=[n2]\t#", maxbuf, 0);
1197                         if (p == NULL)
1198                             goto out;
1199                         ND_TCHECK(*p);
1200                         if (p[0] & 0x80)
1201                             ND_PRINT((ndo, "<GROUP> "));
1202                         switch (p[0] & 0x60) {
1203                         case 0x00: ND_PRINT((ndo, "B ")); break;
1204                         case 0x20: ND_PRINT((ndo, "P ")); break;
1205                         case 0x40: ND_PRINT((ndo, "M ")); break;
1206                         case 0x60: ND_PRINT((ndo, "_ ")); break;
1207                         }
1208                         if (p[0] & 0x10)
1209                             ND_PRINT((ndo, "<DEREGISTERING> "));
1210                         if (p[0] & 0x08)
1211                             ND_PRINT((ndo, "<CONFLICT> "));
1212                         if (p[0] & 0x04)
1213                             ND_PRINT((ndo, "<ACTIVE> "));
1214                         if (p[0] & 0x02)
1215                             ND_PRINT((ndo, "<PERMANENT> "));
1216                         ND_PRINT((ndo, "\n"));
1217                         p += 2;
1218                     }
1219                 } else {
1220                     smb_print_data(ndo, p, min(rdlen, length - (p - data)));
1221                     p += rdlen;
1222                 }
1223             }
1224         }
1225     }
1226
1227     if (p < maxbuf)
1228         smb_fdata(ndo, p, "AdditionalData:\n", maxbuf, 0);
1229
1230 out:
1231     ND_PRINT((ndo, "\n"));
1232     return;
1233 trunc:
1234     ND_PRINT((ndo, "%s", tstr));
1235 }
1236
1237 /*
1238  * Print an SMB-over-TCP packet received across tcp on port 445
1239  */
1240 void
1241 smb_tcp_print(netdissect_options *ndo,
1242               const u_char * data, int length)
1243 {
1244     int caplen;
1245     u_int smb_len;
1246     const u_char *maxbuf;
1247
1248     if (length < 4)
1249         goto trunc;
1250     if (ndo->ndo_snapend < data)
1251         goto trunc;
1252     caplen = ndo->ndo_snapend - data;
1253     if (caplen < 4)
1254         goto trunc;
1255     maxbuf = data + caplen;
1256     smb_len = EXTRACT_BE_U_3(data + 1);
1257     length -= 4;
1258     caplen -= 4;
1259
1260     startbuf = data;
1261     data += 4;
1262
1263     if (smb_len >= 4 && caplen >= 4 && memcmp(data,"\377SMB",4) == 0) {
1264         if ((int)smb_len > caplen) {
1265             if ((int)smb_len > length)
1266                 ND_PRINT((ndo, " WARNING: Packet is continued in later TCP segments\n"));
1267             else
1268                 ND_PRINT((ndo, " WARNING: Short packet. Try increasing the snap length by %d\n",
1269                     smb_len - caplen));
1270         } else
1271             ND_PRINT((ndo, " "));
1272         print_smb(ndo, data, maxbuf > data + smb_len ? data + smb_len : maxbuf);
1273     } else
1274         ND_PRINT((ndo, " SMB-over-TCP packet:(raw data or continuation?)\n"));
1275     return;
1276 trunc:
1277     ND_PRINT((ndo, "%s", tstr));
1278 }
1279
1280 /*
1281  * print a NBT packet received across udp on port 138
1282  */
1283 void
1284 nbt_udp138_print(netdissect_options *ndo,
1285                  const u_char *data, int length)
1286 {
1287     const u_char *maxbuf = data + length;
1288
1289     if (maxbuf > ndo->ndo_snapend)
1290         maxbuf = ndo->ndo_snapend;
1291     if (maxbuf <= data)
1292         return;
1293     startbuf = data;
1294
1295     if (ndo->ndo_vflag < 2) {
1296         ND_PRINT((ndo, "NBT UDP PACKET(138)"));
1297         return;
1298     }
1299
1300     data = smb_fdata(ndo, data,
1301         "\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#",
1302         maxbuf, 0);
1303
1304     if (data != NULL) {
1305         /* If there isn't enough data for "\377SMB", don't check for it. */
1306         if (&data[3] >= maxbuf)
1307             goto out;
1308
1309         if (memcmp(data, "\377SMB",4) == 0)
1310             print_smb(ndo, data, maxbuf);
1311     }
1312 out:
1313     ND_PRINT((ndo, "\n"));
1314 }
1315
1316
1317 /*
1318    print netbeui frames
1319 */
1320 static struct nbf_strings {
1321         const char      *name;
1322         const char      *nonverbose;
1323         const char      *verbose;
1324 } nbf_strings[0x20] = {
1325         { "Add Group Name Query", ", [P23]Name to add=[n2]#",
1326           "[P5]ResponseCorrelator=[w]\n[P16]Name to add=[n2]\n" },
1327         { "Add Name Query", ", [P23]Name to add=[n2]#",
1328           "[P5]ResponseCorrelator=[w]\n[P16]Name to add=[n2]\n" },
1329         { "Name In Conflict", NULL, NULL },
1330         { "Status Query", NULL, NULL },
1331         { NULL, NULL, NULL },   /* not used */
1332         { NULL, NULL, NULL },   /* not used */
1333         { NULL, NULL, NULL },   /* not used */
1334         { "Terminate Trace", NULL, NULL },
1335         { "Datagram", NULL,
1336           "[P7]Destination=[n2]\nSource=[n2]\n" },
1337         { "Broadcast Datagram", NULL,
1338           "[P7]Destination=[n2]\nSource=[n2]\n" },
1339         { "Name Query", ", [P7]Name=[n2]#",
1340           "[P1]SessionNumber=[B]\nNameType=[B][P2]\nResponseCorrelator=[w]\nName=[n2]\nName of sender=[n2]\n" },
1341         { NULL, NULL, NULL },   /* not used */
1342         { NULL, NULL, NULL },   /* not used */
1343         { "Add Name Response", ", [P1]GroupName=[w] [P4]Destination=[n2] Source=[n2]#",
1344           "AddNameInProcess=[B]\nGroupName=[w]\nTransmitCorrelator=[w][P2]\nDestination=[n2]\nSource=[n2]\n" },
1345         { "Name Recognized", NULL,
1346           "[P1]Data2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nDestination=[n2]\nSource=[n2]\n" },
1347         { "Status Response", NULL, NULL },
1348         { NULL, NULL, NULL },   /* not used */
1349         { NULL, NULL, NULL },   /* not used */
1350         { NULL, NULL, NULL },   /* not used */
1351         { "Terminate Trace", NULL, NULL },
1352         { "Data Ack", NULL,
1353           "[P3]TransmitCorrelator=[w][P2]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1354         { "Data First/Middle", NULL,
1355           "Flags=[{RECEIVE_CONTINUE|NO_ACK||PIGGYBACK_ACK_INCLUDED|}]\nResyncIndicator=[w][P2]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1356         { "Data Only/Last", NULL,
1357           "Flags=[{|NO_ACK|PIGGYBACK_ACK_ALLOWED|PIGGYBACK_ACK_INCLUDED|}]\nResyncIndicator=[w][P2]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1358         { "Session Confirm", NULL,
1359           "Data1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1360         { "Session End", NULL,
1361           "[P1]Data2=[w][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1362         { "Session Initialize", NULL,
1363           "Data1=[B]\nData2=[w]\nTransmitCorrelator=[w]\nResponseCorelator=[w]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1364         { "No Receive", NULL,
1365           "Flags=[{|SEND_NO_ACK}]\nDataBytesAccepted=[b][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1366         { "Receive Outstanding", NULL,
1367           "[P1]DataBytesAccepted=[b][P4]\nRemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1368         { "Receive Continue", NULL,
1369           "[P2]TransmitCorrelator=[w]\n[P2]RemoteSessionNumber=[B]\nLocalSessionNumber=[B]\n" },
1370         { NULL, NULL, NULL },   /* not used */
1371         { NULL, NULL, NULL },   /* not used */
1372         { "Session Alive", NULL, NULL }
1373 };
1374
1375 void
1376 netbeui_print(netdissect_options *ndo,
1377               u_short control, const u_char *data, int length)
1378 {
1379     const u_char *maxbuf = data + length;
1380     int len;
1381     int command;
1382     const u_char *data2;
1383     int is_truncated = 0;
1384
1385     if (maxbuf > ndo->ndo_snapend)
1386         maxbuf = ndo->ndo_snapend;
1387     ND_TCHECK(data[4]);
1388     len = EXTRACT_LE_U_2(data);
1389     command = data[4];
1390     data2 = data + len;
1391     if (data2 >= maxbuf) {
1392         data2 = maxbuf;
1393         is_truncated = 1;
1394     }
1395
1396     startbuf = data;
1397
1398     if (ndo->ndo_vflag < 2) {
1399         ND_PRINT((ndo, "NBF Packet: "));
1400         data = smb_fdata(ndo, data, "[P5]#", maxbuf, 0);
1401     } else {
1402         ND_PRINT((ndo, "\n>>> NBF Packet\nType=0x%X ", control));
1403         data = smb_fdata(ndo, data, "Length=[d] Signature=[w] Command=[B]\n#", maxbuf, 0);
1404     }
1405     if (data == NULL)
1406         goto out;
1407
1408     if (command > 0x1f || nbf_strings[command].name == NULL) {
1409         if (ndo->ndo_vflag < 2)
1410             data = smb_fdata(ndo, data, "Unknown NBF Command#", data2, 0);
1411         else
1412             data = smb_fdata(ndo, data, "Unknown NBF Command\n", data2, 0);
1413     } else {
1414         if (ndo->ndo_vflag < 2) {
1415             ND_PRINT((ndo, "%s", nbf_strings[command].name));
1416             if (nbf_strings[command].nonverbose != NULL)
1417                 data = smb_fdata(ndo, data, nbf_strings[command].nonverbose, data2, 0);
1418         } else {
1419             ND_PRINT((ndo, "%s:\n", nbf_strings[command].name));
1420             if (nbf_strings[command].verbose != NULL)
1421                 data = smb_fdata(ndo, data, nbf_strings[command].verbose, data2, 0);
1422             else
1423                 ND_PRINT((ndo, "\n"));
1424         }
1425     }
1426
1427     if (ndo->ndo_vflag < 2)
1428         return;
1429
1430     if (data == NULL)
1431         goto out;
1432
1433     if (is_truncated) {
1434         /* data2 was past the end of the buffer */
1435         goto out;
1436     }
1437
1438     /* If this isn't a command that would contain an SMB message, quit. */
1439     if (command != 0x08 && command != 0x09 && command != 0x15 &&
1440         command != 0x16)
1441         goto out;
1442
1443     /* If there isn't enough data for "\377SMB", don't look for it. */
1444     if (&data2[3] >= maxbuf)
1445         goto out;
1446
1447     if (memcmp(data2, "\377SMB",4) == 0)
1448         print_smb(ndo, data2, maxbuf);
1449     else {
1450         int i;
1451         for (i = 0; i < 128; i++) {
1452             if (&data2[i + 3] >= maxbuf)
1453                 break;
1454             if (memcmp(&data2[i], "\377SMB", 4) == 0) {
1455                 ND_PRINT((ndo, "found SMB packet at %d\n", i));
1456                 print_smb(ndo, &data2[i], maxbuf);
1457                 break;
1458             }
1459         }
1460     }
1461
1462 out:
1463     ND_PRINT((ndo, "\n"));
1464     return;
1465 trunc:
1466     ND_PRINT((ndo, "%s", tstr));
1467 }
1468
1469
1470 /*
1471  * print IPX-Netbios frames
1472  */
1473 void
1474 ipx_netbios_print(netdissect_options *ndo,
1475                   const u_char *data, u_int length)
1476 {
1477     /*
1478      * this is a hack till I work out how to parse the rest of the
1479      * NetBIOS-over-IPX stuff
1480      */
1481     int i;
1482     const u_char *maxbuf;
1483
1484     maxbuf = data + length;
1485     /* Don't go past the end of the captured data in the packet. */
1486     if (maxbuf > ndo->ndo_snapend)
1487         maxbuf = ndo->ndo_snapend;
1488     startbuf = data;
1489     for (i = 0; i < 128; i++) {
1490         if (&data[i + 4] > maxbuf)
1491             break;
1492         if (memcmp(&data[i], "\377SMB", 4) == 0) {
1493             smb_fdata(ndo, data, "\n>>> IPX transport ", &data[i], 0);
1494             print_smb(ndo, &data[i], maxbuf);
1495             ND_PRINT((ndo, "\n"));
1496             break;
1497         }
1498     }
1499     if (i == 128)
1500         smb_fdata(ndo, data, "\n>>> Unknown IPX ", maxbuf, 0);
1501 }