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