The Tcpdump Group git mirrors - tcpdump/blob - smbutil.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 #ifndef lint
  14 static const char rcsid[] _U_ =
  15      "@(#) $Header: /tcpdump/master/tcpdump/smbutil.c,v 1.30 2004-12-28 03:34:08 guy Exp $";
  16 #endif
  17
  18 #include <tcpdump-stdinc.h>
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 #include "interface.h"
  25 #include "extract.h"
  26 #include "smb.h"
  27
  28 extern const u_char *startbuf;
  29
  30 /*
  31  * interpret a 32 bit dos packed date/time to some parameters
  32  */
  33 static void
  34 interpret_dos_date(u_int32_t date, struct tm *tp)
  35 {
  36     u_int32_t p0, p1, p2, p3;
  37
  38     p0 = date & 0xFF;
  39     p1 = ((date & 0xFF00) >> 8) & 0xFF;
  40     p2 = ((date & 0xFF0000) >> 16) & 0xFF;
  41     p3 = ((date & 0xFF000000) >> 24) & 0xFF;
  42
  43     tp->tm_sec = 2 * (p0 & 0x1F);
  44     tp->tm_min = ((p0 >> 5) & 0xFF) + ((p1 & 0x7) << 3);
  45     tp->tm_hour = (p1 >> 3) & 0xFF;
  46     tp->tm_mday = (p2 & 0x1F);
  47     tp->tm_mon = ((p2 >> 5) & 0xFF) + ((p3 & 0x1) << 3) - 1;
  48     tp->tm_year = ((p3 >> 1) & 0xFF) + 80;
  49 }
  50
  51 /*
  52  * common portion:
  53  * create a unix date from a dos date
  54  */
  55 static time_t
  56 int_unix_date(u_int32_t dos_date)
  57 {
  58     struct tm t;
  59
  60     if (dos_date == 0)
  61         return(0);
  62
  63     interpret_dos_date(dos_date, &t);
  64     t.tm_wday = 1;
  65     t.tm_yday = 1;
  66     t.tm_isdst = 0;
  67
  68     return (mktime(&t));
  69 }
  70
  71 /*
  72  * create a unix date from a dos date
  73  * in network byte order
  74  */
  75 static time_t
  76 make_unix_date(const u_char *date_ptr)
  77 {
  78     u_int32_t dos_date = 0;
  79
  80     dos_date = EXTRACT_LE_32BITS(date_ptr);
  81
  82     return int_unix_date(dos_date);
  83 }
  84
  85 /*
  86  * create a unix date from a dos date
  87  * in halfword-swapped network byte order!
  88  */
  89 static time_t
  90 make_unix_date2(const u_char *date_ptr)
  91 {
  92     u_int32_t x, x2;
  93
  94     x = EXTRACT_LE_32BITS(date_ptr);
  95     x2 = ((x & 0xFFFF) << 16) | ((x & 0xFFFF0000) >> 16);
  96     return int_unix_date(x2);
  97 }
  98
  99 /*
 100  * interpret an 8 byte "filetime" structure to a time_t
 101  * It's originally in "100ns units since jan 1st 1601"
 102  */
 103 static time_t
 104 interpret_long_date(const u_char *p)
 105 {
 106     double d;
 107     time_t ret;
 108
 109     TCHECK2(p[4], 4);
 110
 111     /* this gives us seconds since jan 1st 1601 (approx) */
 112     d = (EXTRACT_LE_32BITS(p + 4) * 256.0 + p[3]) * (1.0e-7 * (1 << 24));
 113
 114     /* now adjust by 369 years to make the secs since 1970 */
 115     d -= 369.0 * 365.25 * 24 * 60 * 60;
 116
 117     /* and a fudge factor as we got it wrong by a few days */
 118     d += (3 * 24 * 60 * 60 + 6 * 60 * 60 + 2);
 119
 120     if (d < 0)
 121         return(0);
 122
 123     ret = (time_t)d;
 124
 125     return(ret);
 126 trunc:
 127     return(0);
 128 }
 129
 130 /*
 131  * interpret the weird netbios "name". Return the name type, or -1 if
 132  * we run past the end of the buffer
 133  */
 134 static int
 135 name_interpret(const u_char *in, const u_char *maxbuf, char *out)
 136 {
 137     int ret;
 138     int len;
 139
 140     if (in >= maxbuf)
 141         return(-1);     /* name goes past the end of the buffer */
 142     TCHECK2(*in, 1);
 143     len = (*in++) / 2;
 144
 145     *out=0;
 146
 147     if (len > 30 || len < 1)
 148         return(0);
 149
 150     while (len--) {
 151         TCHECK2(*in, 2);
 152         if (in + 1 >= maxbuf)
 153             return(-1); /* name goes past the end of the buffer */
 154         if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
 155             *out = 0;
 156             return(0);
 157         }
 158         *out = ((in[0] - 'A') << 4) + (in[1] - 'A');
 159         in += 2;
 160         out++;
 161     }
 162     *out = 0;
 163     ret = out[-1];
 164
 165     return(ret);
 166
 167 trunc:
 168     return(-1);
 169 }
 170
 171 /*
 172  * find a pointer to a netbios name
 173  */
 174 static const u_char *
 175 name_ptr(const u_char *buf, int ofs, const u_char *maxbuf)
 176 {
 177     const u_char *p;
 178     u_char c;
 179
 180     p = buf + ofs;
 181     if (p >= maxbuf)
 182         return(NULL);   /* name goes past the end of the buffer */
 183     TCHECK2(*p, 1);
 184
 185     c = *p;
 186
 187     /* XXX - this should use the same code that the DNS dissector does */
 188     if ((c & 0xC0) == 0xC0) {
 189         u_int16_t l = EXTRACT_16BITS(buf + ofs) & 0x3FFF;
 190         if (l == 0) {
 191             /* We have a pointer that points to itself. */
 192             return(NULL);
 193         }
 194         p = buf + l;
 195         if (p >= maxbuf)
 196             return(NULL);       /* name goes past the end of the buffer */
 197         TCHECK2(*p, 1);
 198         return(buf + l);
 199     } else
 200         return(buf + ofs);
 201
 202 trunc:
 203     return(NULL);       /* name goes past the end of the buffer */
 204 }
 205
 206 /*
 207  * extract a netbios name from a buf
 208  */
 209 static int
 210 name_extract(const u_char *buf, int ofs, const u_char *maxbuf, char *name)
 211 {
 212     const u_char *p = name_ptr(buf, ofs, maxbuf);
 213     if (p == NULL)
 214         return(-1);     /* error (probably name going past end of buffer) */
 215     name[0] = '\0';
 216     return(name_interpret(p, maxbuf, name));
 217 }
 218
 219
 220 /*
 221  * return the total storage length of a mangled name
 222  */
 223 static int
 224 name_len(const unsigned char *s, const unsigned char *maxbuf)
 225 {
 226     const unsigned char *s0 = s;
 227     unsigned char c;
 228
 229     if (s >= maxbuf)
 230         return(-1);     /* name goes past the end of the buffer */
 231     TCHECK2(*s, 1);
 232     c = *s;
 233     if ((c & 0xC0) == 0xC0)
 234         return(2);
 235     while (*s) {
 236         if (s >= maxbuf)
 237             return(-1); /* name goes past the end of the buffer */
 238         TCHECK2(*s, 1);
 239         s += (*s) + 1;
 240     }
 241     return(PTR_DIFF(s, s0) + 1);
 242
 243 trunc:
 244     return(-1); /* name goes past the end of the buffer */
 245 }
 246
 247 static void
 248 print_asc(const unsigned char *buf, int len)
 249 {
 250     int i;
 251     for (i = 0; i < len; i++)
 252         safeputchar(buf[i]);
 253 }
 254
 255 static const char *
 256 name_type_str(int name_type)
 257 {
 258     const char *f = NULL;
 259
 260     switch (name_type) {
 261     case 0:    f = "Workstation"; break;
 262     case 0x03: f = "Client?"; break;
 263     case 0x20: f = "Server"; break;
 264     case 0x1d: f = "Master Browser"; break;
 265     case 0x1b: f = "Domain Controller"; break;
 266     case 0x1e: f = "Browser Server"; break;
 267     default:   f = "Unknown"; break;
 268     }
 269     return(f);
 270 }
 271
 272 void
 273 print_data(const unsigned char *buf, int len)
 274 {
 275     int i = 0;
 276
 277     if (len <= 0)
 278         return;
 279     printf("[%03X] ", i);
 280     for (i = 0; i < len; /*nothing*/) {
 281         printf("%02X ", buf[i] & 0xff);
 282         i++;
 283         if (i%8 == 0)
 284             printf(" ");
 285         if (i % 16 == 0) {
 286             print_asc(&buf[i - 16], 8);
 287             printf(" ");
 288             print_asc(&buf[i - 8], 8);
 289             printf("\n");
 290             if (i < len)
 291                 printf("[%03X] ", i);
 292         }
 293     }
 294     if (i % 16) {
 295         int n;
 296
 297         n = 16 - (i % 16);
 298         printf(" ");
 299         if (n>8)
 300             printf(" ");
 301         while (n--)
 302             printf("   ");
 303
 304         n = SMBMIN(8, i % 16);
 305         print_asc(&buf[i - (i % 16)], n);
 306         printf(" ");
 307         n = (i % 16) - n;
 308         if (n > 0)
 309             print_asc(&buf[i - n], n);
 310         printf("\n");
 311     }
 312 }
 313
 314
 315 static void
 316 write_bits(unsigned int val, const char *fmt)
 317 {
 318     const char *p = fmt;
 319     int i = 0;
 320
 321     while ((p = strchr(fmt, '|'))) {
 322         size_t l = PTR_DIFF(p, fmt);
 323         if (l && (val & (1 << i)))
 324             printf("%.*s ", (int)l, fmt);
 325         fmt = p + 1;
 326         i++;
 327     }
 328 }
 329
 330 /* convert a UCS2 string into iso-8859-1 string */
 331 static const char *
 332 unistr(const u_char *s, int *len)
 333 {
 334     static char buf[1000];
 335     int l=0;
 336     static int use_unicode = -1;
 337
 338     if (use_unicode == -1) {
 339         char *p = getenv("USE_UNICODE");
 340         if (p && (atoi(p) == 1))
 341             use_unicode = 1;
 342         else
 343             use_unicode = 0;
 344     }
 345
 346     /* maybe it isn't unicode - a cheap trick */
 347     if (!use_unicode || (s[0] && s[1])) {
 348         *len = strlen((const char *)s) + 1;
 349         return (const char *)s;
 350     }
 351
 352     *len = 0;
 353
 354     if (s[0] == 0 && s[1] != 0) {
 355         s++;
 356         *len = 1;
 357     }
 358
 359     while (l < (int)(sizeof(buf) - 1) && s[0] && s[1] == 0) {
 360         buf[l] = s[0];
 361         s += 2;
 362         l++;
 363         *len += 2;
 364     }
 365     buf[l] = 0;
 366     *len += 2;
 367     return buf;
 368 }
 369
 370 static const u_char *
 371 smb_fdata1(const u_char *buf, const char *fmt, const u_char *maxbuf)
 372 {
 373     int reverse = 0;
 374     const char *attrib_fmt = "READONLY|HIDDEN|SYSTEM|VOLUME|DIR|ARCHIVE|";
 375     int len;
 376
 377     while (*fmt && buf<maxbuf) {
 378         switch (*fmt) {
 379         case 'a':
 380             write_bits(buf[0], attrib_fmt);
 381             buf++;
 382             fmt++;
 383             break;
 384
 385         case 'A':
 386             write_bits(EXTRACT_LE_16BITS(buf), attrib_fmt);
 387             buf += 2;
 388             fmt++;
 389             break;
 390
 391         case '{':
 392           {
 393             char bitfmt[128];
 394             char *p;
 395             int l;
 396
 397             p = strchr(++fmt, '}');
 398             l = PTR_DIFF(p, fmt);
 399
 400             if ((unsigned int)l > sizeof(bitfmt) - 1)
 401                     l = sizeof(bitfmt)-1;
 402
 403             strncpy(bitfmt, fmt, l);
 404             bitfmt[l] = '\0';
 405             fmt = p + 1;
 406             write_bits(buf[0], bitfmt);
 407             buf++;
 408             break;
 409           }
 410
 411         case 'P':
 412           {
 413             int l = atoi(fmt + 1);
 414             buf += l;
 415             fmt++;
 416             while (isdigit((unsigned char)*fmt))
 417                 fmt++;
 418             break;
 419           }
 420         case 'r':
 421             reverse = !reverse;
 422             fmt++;
 423             break;
 424         case 'b':
 425           {
 426             unsigned int x;
 427             TCHECK(buf[0]);
 428             x = buf[0];
 429             printf("%u (0x%x)", x, x);
 430             buf += 1;
 431             fmt++;
 432             break;
 433           }
 434         case 'd':
 435           {
 436             unsigned int x;
 437             TCHECK2(buf[0], 2);
 438             x = reverse ? EXTRACT_16BITS(buf) :
 439                           EXTRACT_LE_16BITS(buf);
 440             printf("%d (0x%x)", x, x);
 441             buf += 2;
 442             fmt++;
 443             break;
 444           }
 445         case 'D':
 446           {
 447             unsigned int x;
 448             TCHECK2(buf[0], 4);
 449             x = reverse ? EXTRACT_32BITS(buf) :
 450                           EXTRACT_LE_32BITS(buf);
 451             printf("%d (0x%x)", x, x);
 452             buf += 4;
 453             fmt++;
 454             break;
 455           }
 456         case 'L':
 457           {
 458             u_int64_t x;
 459             TCHECK2(buf[0], 8);
 460             x = reverse ? EXTRACT_64BITS(buf) :
 461                           EXTRACT_LE_64BITS(buf);
 462             printf("%" PRIu64 " (0x%" PRIx64 ")", x, x);
 463             buf += 8;
 464             fmt++;
 465             break;
 466           }
 467         case 'B':
 468           {
 469             unsigned int x;
 470             TCHECK(buf[0]);
 471             x = buf[0];
 472             printf("0x%X", x);
 473             buf += 1;
 474             fmt++;
 475             break;
 476           }
 477         case 'w':
 478           {
 479             unsigned int x;
 480             TCHECK2(buf[0], 2);
 481             x = reverse ? EXTRACT_16BITS(buf) :
 482                           EXTRACT_LE_16BITS(buf);
 483             printf("0x%X", x);
 484             buf += 2;
 485             fmt++;
 486             break;
 487           }
 488         case 'W':
 489           {
 490             unsigned int x;
 491             TCHECK2(buf[0], 4);
 492             x = reverse ? EXTRACT_32BITS(buf) :
 493                           EXTRACT_LE_32BITS(buf);
 494             printf("0x%X", x);
 495             buf += 4;
 496             fmt++;
 497             break;
 498           }
 499         case 'S':
 500           {
 501             /*XXX unistr() */
 502             printf("%.*s", (int)PTR_DIFF(maxbuf, buf), unistr(buf, &len));
 503             buf += len;
 504             fmt++;
 505             break;
 506           }
 507         case 'Z':
 508           {
 509             if (*buf != 4 && *buf != 2)
 510                 printf("Error! ASCIIZ buffer of type %u (safety=%lu)\n", *buf,
 511                     (unsigned long)PTR_DIFF(maxbuf, buf));
 512             printf("%.*s", (int)PTR_DIFF(maxbuf, buf + 1),
 513                 unistr(buf + 1, &len));
 514             buf += len + 1;
 515             fmt++;
 516             break;
 517           }
 518         case 's':
 519           {
 520             int l = atoi(fmt + 1);
 521             printf("%-*.*s", l, l, buf);
 522             buf += l;
 523             fmt++;
 524             while (isdigit((unsigned char)*fmt))
 525                 fmt++;
 526             break;
 527           }
 528         case 'h':
 529           {
 530             int l = atoi(fmt + 1);
 531             while (l--)
 532                 printf("%02x", *buf++);
 533             fmt++;
 534             while (isdigit((unsigned char)*fmt))
 535                 fmt++;
 536             break;
 537           }
 538         case 'n':
 539           {
 540             int t = atoi(fmt+1);
 541             char nbuf[255];
 542             int name_type;
 543             int len;
 544
 545             switch (t) {
 546             case 1:
 547                 name_type = name_extract(startbuf, PTR_DIFF(buf, startbuf),
 548                     maxbuf, nbuf);
 549                 if (name_type < 0)
 550                     goto trunc;
 551                 len = name_len(buf, maxbuf);
 552                 if (len < 0)
 553                     goto trunc;
 554                 buf += len;
 555                 printf("%-15.15s NameType=0x%02X (%s)", nbuf, name_type,
 556                     name_type_str(name_type));
 557                 break;
 558             case 2:
 559                 name_type = buf[15];
 560                 printf("%-15.15s NameType=0x%02X (%s)", buf, name_type,
 561                     name_type_str(name_type));
 562                 buf += 16;
 563                 break;
 564             }
 565             fmt++;
 566             while (isdigit((unsigned char)*fmt))
 567                 fmt++;
 568             break;
 569           }
 570         case 'T':
 571           {
 572             time_t t;
 573             struct tm *lt;
 574             const char *tstring;
 575             u_int32_t x;
 576             x = EXTRACT_LE_32BITS(buf);
 577
 578             switch (atoi(fmt + 1)) {
 579             case 1:
 580                 if (x == 0 || x == 0xFFFFFFFF)
 581                     t = 0;
 582                 else
 583                     t = make_unix_date(buf);
 584                 buf += 4;
 585                 break;
 586             case 2:
 587                 if (x == 0 || x == 0xFFFFFFFF)
 588                     t = 0;
 589                 else
 590                     t = make_unix_date2(buf);
 591                 buf += 4;
 592                 break;
 593             case 3:
 594                 t = interpret_long_date(buf);
 595                 buf += 8;
 596                 break;
 597             }
 598             if (t != 0) {
 599                 lt = localtime(&t);
 600                 if (lt != NULL)
 601                     tstring = asctime(lt);
 602                 else
 603                     tstring = "(Can't convert time)\n";
 604             } else
 605                 tstring = "NULL\n";
 606             printf("%s", tstring);
 607             fmt++;
 608             while (isdigit((unsigned char)*fmt))
 609                 fmt++;
 610             break;
 611           }
 612         default:
 613             putchar(*fmt);
 614             fmt++;
 615             break;
 616         }
 617     }
 618
 619     if (buf >= maxbuf && *fmt)
 620         printf("END OF BUFFER\n");
 621
 622     return(buf);
 623
 624 trunc:
 625     printf("\n");
 626     printf("WARNING: Short packet. Try increasing the snap length\n");
 627     return(NULL);
 628 }
 629
 630 const u_char *
 631 smb_fdata(const u_char *buf, const char *fmt, const u_char *maxbuf)
 632 {
 633     static int depth = 0;
 634     char s[128];
 635     char *p;
 636
 637     while (*fmt) {
 638         switch (*fmt) {
 639         case '*':
 640             fmt++;
 641             while (buf < maxbuf) {
 642                 const u_char *buf2;
 643                 depth++;
 644                 buf2 = smb_fdata(buf, fmt, maxbuf);
 645                 depth--;
 646                 if (buf2 == NULL)
 647                     return(NULL);
 648                 if (buf2 == buf)
 649                     return(buf);
 650                 buf = buf2;
 651             }
 652             return(buf);
 653
 654         case '|':
 655             fmt++;
 656             if (buf >= maxbuf)
 657                 return(buf);
 658             break;
 659
 660         case '%':
 661             fmt++;
 662             buf = maxbuf;
 663             break;
 664
 665         case '#':
 666             fmt++;
 667             return(buf);
 668             break;
 669
 670         case '[':
 671             fmt++;
 672             if (buf >= maxbuf)
 673                 return(buf);
 674             memset(s, 0, sizeof(s));
 675             p = strchr(fmt, ']');
 676             if ((size_t)(p - fmt + 1) > sizeof(s)) {
 677                 /* overrun */
 678                 return(buf);
 679             }
 680             strncpy(s, fmt, p - fmt);
 681             s[p - fmt] = '\0';
 682             fmt = p + 1;
 683             buf = smb_fdata1(buf, s, maxbuf);
 684             if (buf == NULL)
 685                 return(NULL);
 686             break;
 687
 688         default:
 689             putchar(*fmt);
 690             fmt++;
 691             fflush(stdout);
 692             break;
 693         }
 694     }
 695     if (!depth && buf < maxbuf) {
 696         size_t len = PTR_DIFF(maxbuf, buf);
 697         printf("Data: (%lu bytes)\n", (unsigned long)len);
 698         print_data(buf, len);
 699         return(buf + len);
 700     }
 701     return(buf);
 702 }
 703
 704 typedef struct {
 705     const char *name;
 706     int code;
 707     const char *message;
 708 } err_code_struct;
 709
 710 /* Dos Error Messages */
 711 static err_code_struct dos_msgs[] = {
 712     { "ERRbadfunc", 1, "Invalid function." },
 713     { "ERRbadfile", 2, "File not found." },
 714     { "ERRbadpath", 3, "Directory invalid." },
 715     { "ERRnofids", 4, "No file descriptors available" },
 716     { "ERRnoaccess", 5, "Access denied." },
 717     { "ERRbadfid", 6, "Invalid file handle." },
 718     { "ERRbadmcb", 7, "Memory control blocks destroyed." },
 719     { "ERRnomem", 8, "Insufficient server memory to perform the requested function." },
 720     { "ERRbadmem", 9, "Invalid memory block address." },
 721     { "ERRbadenv", 10, "Invalid environment." },
 722     { "ERRbadformat", 11, "Invalid format." },
 723     { "ERRbadaccess", 12, "Invalid open mode." },
 724     { "ERRbaddata", 13, "Invalid data." },
 725     { "ERR", 14, "reserved." },
 726     { "ERRbaddrive", 15, "Invalid drive specified." },
 727     { "ERRremcd", 16, "A Delete Directory request attempted to remove the server's current directory." },
 728     { "ERRdiffdevice", 17, "Not same device." },
 729     { "ERRnofiles", 18, "A File Search command can find no more files matching the specified criteria." },
 730     { "ERRbadshare", 32, "The sharing mode specified for an Open conflicts with existing FIDs on the file." },
 731     { "ERRlock", 33, "A Lock request conflicted with an existing lock or specified an invalid mode, or an Unlock requested attempted to remove a lock held by another process." },
 732     { "ERRfilexists", 80, "The file named in a Create Directory, Make New File or Link request already exists." },
 733     { "ERRbadpipe", 230, "Pipe invalid." },
 734     { "ERRpipebusy", 231, "All instances of the requested pipe are busy." },
 735     { "ERRpipeclosing", 232, "Pipe close in progress." },
 736     { "ERRnotconnected", 233, "No process on other end of pipe." },
 737     { "ERRmoredata", 234, "There is more data to be returned." },
 738     { NULL, -1, NULL }
 739  };
 740
 741 /* Server Error Messages */
 742 err_code_struct server_msgs[] = {
 743     { "ERRerror", 1, "Non-specific error code." },
 744     { "ERRbadpw", 2, "Bad password - name/password pair in a Tree Connect or Session Setup are invalid." },
 745     { "ERRbadtype", 3, "reserved." },
 746     { "ERRaccess", 4, "The requester does not have the necessary access rights within the specified context for the requested function. The context is defined by the TID or the UID." },
 747     { "ERRinvnid", 5, "The tree ID (TID) specified in a command was invalid." },
 748     { "ERRinvnetname", 6, "Invalid network name in tree connect." },
 749     { "ERRinvdevice", 7, "Invalid device - printer request made to non-printer connection or non-printer request made to printer connection." },
 750     { "ERRqfull", 49, "Print queue full (files) -- returned by open print file." },
 751     { "ERRqtoobig", 50, "Print queue full -- no space." },
 752     { "ERRqeof", 51, "EOF on print queue dump." },
 753     { "ERRinvpfid", 52, "Invalid print file FID." },
 754     { "ERRsmbcmd", 64, "The server did not recognize the command received." },
 755     { "ERRsrverror", 65, "The server encountered an internal error, e.g., system file unavailable." },
 756     { "ERRfilespecs", 67, "The file handle (FID) and pathname parameters contained an invalid combination of values." },
 757     { "ERRreserved", 68, "reserved." },
 758     { "ERRbadpermits", 69, "The access permissions specified for a file or directory are not a valid combination.  The server cannot set the requested attribute." },
 759     { "ERRreserved", 70, "reserved." },
 760     { "ERRsetattrmode", 71, "The attribute mode in the Set File Attribute request is invalid." },
 761     { "ERRpaused", 81, "Server is paused." },
 762     { "ERRmsgoff", 82, "Not receiving messages." },
 763     { "ERRnoroom", 83, "No room to buffer message." },
 764     { "ERRrmuns", 87, "Too many remote user names." },
 765     { "ERRtimeout", 88, "Operation timed out." },
 766     { "ERRnoresource", 89, "No resources currently available for request." },
 767     { "ERRtoomanyuids", 90, "Too many UIDs active on this session." },
 768     { "ERRbaduid", 91, "The UID is not known as a valid ID on this session." },
 769     { "ERRusempx", 250, "Temp unable to support Raw, use MPX mode." },
 770     { "ERRusestd", 251, "Temp unable to support Raw, use standard read/write." },
 771     { "ERRcontmpx", 252, "Continue in MPX mode." },
 772     { "ERRreserved", 253, "reserved." },
 773     { "ERRreserved", 254, "reserved." },
 774     { "ERRnosupport", 0xFFFF, "Function not supported." },
 775     { NULL, -1, NULL }
 776 };
 777
 778 /* Hard Error Messages */
 779 err_code_struct hard_msgs[] = {
 780     { "ERRnowrite", 19, "Attempt to write on write-protected diskette." },
 781     { "ERRbadunit", 20, "Unknown unit." },
 782     { "ERRnotready", 21, "Drive not ready." },
 783     { "ERRbadcmd", 22, "Unknown command." },
 784     { "ERRdata", 23, "Data error (CRC)." },
 785     { "ERRbadreq", 24, "Bad request structure length." },
 786     { "ERRseek", 25 , "Seek error." },
 787     { "ERRbadmedia", 26, "Unknown media type." },
 788     { "ERRbadsector", 27, "Sector not found." },
 789     { "ERRnopaper", 28, "Printer out of paper." },
 790     { "ERRwrite", 29, "Write fault." },
 791     { "ERRread", 30, "Read fault." },
 792     { "ERRgeneral", 31, "General failure." },
 793     { "ERRbadshare", 32, "A open conflicts with an existing open." },
 794     { "ERRlock", 33, "A Lock request conflicted with an existing lock or specified an invalid mode, or an Unlock requested attempted to remove a lock held by another process." },
 795     { "ERRwrongdisk", 34, "The wrong disk was found in a drive." },
 796     { "ERRFCBUnavail", 35, "No FCBs are available to process request." },
 797     { "ERRsharebufexc", 36, "A sharing buffer has been exceeded." },
 798     { NULL, -1, NULL }
 799 };
 800
 801 static struct {
 802     int code;
 803     const char *class;
 804     err_code_struct *err_msgs;
 805 } err_classes[] = {
 806     { 0, "SUCCESS", NULL },
 807     { 0x01, "ERRDOS", dos_msgs },
 808     { 0x02, "ERRSRV", server_msgs },
 809     { 0x03, "ERRHRD", hard_msgs },
 810     { 0x04, "ERRXOS", NULL },
 811     { 0xE1, "ERRRMX1", NULL },
 812     { 0xE2, "ERRRMX2", NULL },
 813     { 0xE3, "ERRRMX3", NULL },
 814     { 0xFF, "ERRCMD", NULL },
 815     { -1, NULL, NULL }
 816 };
 817
 818 /*
 819  * return a SMB error string from a SMB buffer
 820  */
 821 char *
 822 smb_errstr(int class, int num)
 823 {
 824     static char ret[128];
 825     int i, j;
 826
 827     ret[0] = 0;
 828
 829     for (i = 0; err_classes[i].class; i++)
 830         if (err_classes[i].code == class) {
 831             if (err_classes[i].err_msgs) {
 832                 err_code_struct *err = err_classes[i].err_msgs;
 833                 for (j = 0; err[j].name; j++)
 834                     if (num == err[j].code) {
 835                         snprintf(ret, sizeof(ret), "%s - %s (%s)",
 836                             err_classes[i].class, err[j].name, err[j].message);
 837                         return ret;
 838                     }
 839             }
 840
 841             snprintf(ret, sizeof(ret), "%s - %d", err_classes[i].class, num);
 842             return ret;
 843         }
 844
 845     snprintf(ret, sizeof(ret), "ERROR: Unknown error (%d,%d)", class, num);
 846     return(ret);
 847 }