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[] =
  15      "@(#) $Header: /tcpdump/master/tcpdump/smbutil.c,v 1.19 2002-04-20 09:42:58 guy Exp $";
  16 #endif
  17
  18 #include <sys/param.h>
  19 #include <sys/time.h>
  20 #include <sys/types.h>
  21 #include <sys/socket.h>
  22
  23 #include <netinet/in.h>
  24
  25 #include <ctype.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #ifdef TIME_WITH_SYS_TIME
  30 #include <time.h>
  31 #endif
  32
  33 #include "interface.h"
  34 #include "extract.h"
  35 #include "smb.h"
  36
  37 extern const u_char *startbuf;
  38
  39 /*
  40  * interpret a 32 bit dos packed date/time to some parameters
  41  */
  42 static void
  43 interpret_dos_date(u_int32_t date, struct tm *tp)
  44 {
  45     u_int32_t p0, p1, p2, p3;
  46
  47     p0 = date & 0xFF;
  48     p1 = ((date & 0xFF00) >> 8) & 0xFF;
  49     p2 = ((date & 0xFF0000) >> 16) & 0xFF;
  50     p3 = ((date & 0xFF000000) >> 24) & 0xFF;
  51
  52     tp->tm_sec = 2 * (p0 & 0x1F);
  53     tp->tm_min = ((p0 >> 5) & 0xFF) + ((p1 & 0x7) << 3);
  54     tp->tm_hour = (p1 >> 3) & 0xFF;
  55     tp->tm_mday = (p2 & 0x1F);
  56     tp->tm_mon = ((p2 >> 5) & 0xFF) + ((p3 & 0x1) << 3) - 1;
  57     tp->tm_year = ((p3 >> 1) & 0xFF) + 80;
  58 }
  59
  60 /*
  61  * common portion:
  62  * create a unix date from a dos date
  63  */
  64 static time_t
  65 int_unix_date(u_int32_t dos_date)
  66 {
  67     struct tm t;
  68
  69     if (dos_date == 0)
  70         return(0);
  71
  72     interpret_dos_date(dos_date, &t);
  73     t.tm_wday = 1;
  74     t.tm_yday = 1;
  75     t.tm_isdst = 0;
  76
  77     return (mktime(&t));
  78 }
  79
  80 /*
  81  * create a unix date from a dos date
  82  * in network byte order
  83  */
  84 static time_t
  85 make_unix_date(const u_char *date_ptr)
  86 {
  87     u_int32_t dos_date = 0;
  88
  89     dos_date = EXTRACT_LE_32BITS(date_ptr);
  90
  91     return int_unix_date(dos_date);
  92 }
  93
  94 /*
  95  * create a unix date from a dos date
  96  * in halfword-swapped network byte order!
  97  */
  98 static time_t
  99 make_unix_date2(const u_char *date_ptr)
 100 {
 101     u_int32_t x, x2;
 102
 103     x = EXTRACT_LE_32BITS(date_ptr);
 104     x2 = ((x & 0xFFFF) << 16) | ((x & 0xFFFF0000) >> 16);
 105     return int_unix_date(x2);
 106 }
 107
 108 /*
 109  * interpret an 8 byte "filetime" structure to a time_t
 110  * It's originally in "100ns units since jan 1st 1601"
 111  */
 112 static time_t
 113 interpret_long_date(const u_char *p)
 114 {
 115     double d;
 116     time_t ret;
 117
 118     TCHECK2(p[4], 4);
 119
 120     /* this gives us seconds since jan 1st 1601 (approx) */
 121     d = (EXTRACT_LE_32BITS(p + 4) * 256.0 + p[3]) * (1.0e-7 * (1 << 24));
 122
 123     /* now adjust by 369 years to make the secs since 1970 */
 124     d -= 369.0 * 365.25 * 24 * 60 * 60;
 125
 126     /* and a fudge factor as we got it wrong by a few days */
 127     d += (3 * 24 * 60 * 60 + 6 * 60 * 60 + 2);
 128
 129     if (d < 0)
 130         return(0);
 131
 132     ret = (time_t)d;
 133
 134     return(ret);
 135 trunc:
 136     return(0);
 137 }
 138
 139 /*
 140  * interpret the weird netbios "name". Return the name type, or -1 if
 141  * we run past the end of the buffer
 142  */
 143 static int
 144 name_interpret(const u_char *in, const u_char *maxbuf, char *out)
 145 {
 146     int ret;
 147     int len;
 148
 149     if (in >= maxbuf)
 150         return(-1);     /* name goes past the end of the buffer */
 151     TCHECK2(*in, 1);
 152     len = (*in++) / 2;
 153
 154     *out=0;
 155
 156     if (len > 30 || len < 1)
 157         return(0);
 158
 159     while (len--) {
 160         TCHECK2(*in, 2);
 161         if (in + 1 >= maxbuf)
 162             return(-1); /* name goes past the end of the buffer */
 163         if (in[0] < 'A' || in[0] > 'P' || in[1] < 'A' || in[1] > 'P') {
 164             *out = 0;
 165             return(0);
 166         }
 167         *out = ((in[0] - 'A') << 4) + (in[1] - 'A');
 168         in += 2;
 169         out++;
 170     }
 171     *out = 0;
 172     ret = out[-1];
 173
 174     return(ret);
 175
 176 trunc:
 177     return(-1);
 178 }
 179
 180 /*
 181  * find a pointer to a netbios name
 182  */
 183 static const u_char *
 184 name_ptr(const u_char *buf, int ofs, const u_char *maxbuf)
 185 {
 186     const u_char *p;
 187     u_char c;
 188
 189     p = buf + ofs;
 190     if (p >= maxbuf)
 191         return(NULL);   /* name goes past the end of the buffer */
 192     TCHECK2(*p, 1);
 193
 194     c = *p;
 195
 196     /* XXX - this should use the same code that the DNS dissector does */
 197     if ((c & 0xC0) == 0xC0) {
 198         u_int16_t l = EXTRACT_16BITS(buf + ofs) & 0x3FFF;
 199         if (l == 0) {
 200             /* We have a pointer that points to itself. */
 201             return(NULL);
 202         }
 203         p = buf + l;
 204         if (p >= maxbuf)
 205             return(NULL);       /* name goes past the end of the buffer */
 206         TCHECK2(*p, 1);
 207         return(buf + l);
 208     } else
 209         return(buf + ofs);
 210
 211 trunc:
 212     return(NULL);       /* name goes past the end of the buffer */
 213 }
 214
 215 /*
 216  * extract a netbios name from a buf
 217  */
 218 static int
 219 name_extract(const u_char *buf, int ofs, const u_char *maxbuf, char *name)
 220 {
 221     const u_char *p = name_ptr(buf, ofs, maxbuf);
 222     if (p == NULL)
 223         return(-1);     /* error (probably name going past end of buffer) */
 224     name[0] = '\0';
 225     return(name_interpret(p, maxbuf, name));
 226 }
 227
 228
 229 /*
 230  * return the total storage length of a mangled name
 231  */
 232 static int
 233 name_len(const unsigned char *s, const unsigned char *maxbuf)
 234 {
 235     const unsigned char *s0 = s;
 236     unsigned char c;
 237
 238     if (s >= maxbuf)
 239         return(-1);     /* name goes past the end of the buffer */
 240     TCHECK2(*s, 1);
 241     c = *s;
 242     if ((c & 0xC0) == 0xC0)
 243         return(2);
 244     while (*s) {
 245         if (s >= maxbuf)
 246             return(-1); /* name goes past the end of the buffer */
 247         TCHECK2(*s, 1);
 248         s += (*s) + 1;
 249     }
 250     return(PTR_DIFF(s, s0) + 1);
 251
 252 trunc:
 253     return(-1); /* name goes past the end of the buffer */
 254 }
 255
 256 static void
 257 print_asc(const unsigned char *buf, int len)
 258 {
 259     int i;
 260     for (i = 0; i < len; i++)
 261         safeputchar(buf[i]);
 262 }
 263
 264 static char *
 265 name_type_str(int name_type)
 266 {
 267     char *f = NULL;
 268
 269     switch (name_type) {
 270     case 0:    f = "Workstation"; break;
 271     case 0x03: f = "Client?"; break;
 272     case 0x20: f = "Server"; break;
 273     case 0x1d: f = "Master Browser"; break;
 274     case 0x1b: f = "Domain Controller"; break;
 275     case 0x1e: f = "Browser Server"; break;
 276     default:   f = "Unknown"; break;
 277     }
 278     return(f);
 279 }
 280
 281 void
 282 print_data(const unsigned char *buf, int len)
 283 {
 284     int i = 0;
 285
 286     if (len <= 0)
 287         return;
 288     printf("[%03X] ", i);
 289     for (i = 0; i < len; /*nothing*/) {
 290         printf("%02X ", buf[i] & 0xff);
 291         i++;
 292         if (i%8 == 0)
 293             printf(" ");
 294         if (i % 16 == 0) {
 295             print_asc(&buf[i - 16], 8);
 296             printf(" ");
 297             print_asc(&buf[i - 8], 8);
 298             printf("\n");
 299             if (i < len)
 300                 printf("[%03X] ", i);
 301         }
 302     }
 303     if (i % 16) {
 304         int n;
 305
 306         n = 16 - (i % 16);
 307         printf(" ");
 308         if (n>8)
 309             printf(" ");
 310         while (n--)
 311             printf("   ");
 312
 313         n = SMBMIN(8, i % 16);
 314         print_asc(&buf[i - (i % 16)], n);
 315         printf(" ");
 316         n = (i % 16) - n;
 317         if (n > 0)
 318             print_asc(&buf[i - n], n);
 319         printf("\n");
 320     }
 321 }
 322
 323
 324 static void
 325 write_bits(unsigned int val, char *fmt)
 326 {
 327     char *p = fmt;
 328     int i = 0;
 329
 330     while ((p = strchr(fmt, '|'))) {
 331         size_t l = PTR_DIFF(p, fmt);
 332         if (l && (val & (1 << i)))
 333             printf("%.*s ", (int)l, fmt);
 334         fmt = p + 1;
 335         i++;
 336     }
 337 }
 338
 339 /* convert a UCS2 string into iso-8859-1 string */
 340 static const char *
 341 unistr(const char *s, int *len)
 342 {
 343     static char buf[1000];
 344     int l=0;
 345     static int use_unicode = -1;
 346
 347     if (use_unicode == -1) {
 348         char *p = getenv("USE_UNICODE");
 349         if (p && (atoi(p) == 1))
 350             use_unicode = 1;
 351         else
 352             use_unicode = 0;
 353     }
 354
 355     /* maybe it isn't unicode - a cheap trick */
 356     if (!use_unicode || (s[0] && s[1])) {
 357         *len = strlen(s) + 1;
 358         return s;
 359     }
 360
 361     *len = 0;
 362
 363     if (s[0] == 0 && s[1] != 0) {
 364         s++;
 365         *len = 1;
 366     }
 367
 368     while (l < (sizeof(buf) - 1) && s[0] && s[1] == 0) {
 369         buf[l] = s[0];
 370         s += 2;
 371         l++;
 372         *len += 2;
 373     }
 374     buf[l] = 0;
 375     *len += 2;
 376     return buf;
 377 }
 378
 379 static const u_char *
 380 smb_fdata1(const u_char *buf, const char *fmt, const u_char *maxbuf)
 381 {
 382     int reverse = 0;
 383     char *attrib_fmt = "READONLY|HIDDEN|SYSTEM|VOLUME|DIR|ARCHIVE|";
 384     int len;
 385
 386     while (*fmt && buf<maxbuf) {
 387         switch (*fmt) {
 388         case 'a':
 389             write_bits(buf[0], attrib_fmt);
 390             buf++;
 391             fmt++;
 392             break;
 393
 394         case 'A':
 395             write_bits(EXTRACT_LE_16BITS(buf), attrib_fmt);
 396             buf += 2;
 397             fmt++;
 398             break;
 399
 400         case '{':
 401           {
 402             char bitfmt[128];
 403             char *p = strchr(++fmt, '}');
 404             int l = PTR_DIFF(p, fmt);
 405             strncpy(bitfmt, fmt, l);
 406             bitfmt[l] = 0;
 407             fmt = p + 1;
 408             write_bits(buf[0], bitfmt);
 409             buf++;
 410             break;
 411           }
 412
 413         case 'P':
 414           {
 415             int l = atoi(fmt + 1);
 416             buf += l;
 417             fmt++;
 418             while (isdigit(*fmt))
 419                 fmt++;
 420             break;
 421           }
 422         case 'r':
 423             reverse = !reverse;
 424             fmt++;
 425             break;
 426         case 'D':
 427           {
 428             unsigned int x;
 429
 430             TCHECK2(buf[0], 4);
 431             x = reverse ? EXTRACT_32BITS(buf) : EXTRACT_LE_32BITS(buf);
 432             printf("%d (0x%x)", x, x);
 433             buf += 4;
 434             fmt++;
 435             break;
 436           }
 437         case 'L':
 438           {
 439             unsigned int x1, x2;
 440
 441             TCHECK2(buf[4], 4);
 442             x1 = reverse ? EXTRACT_32BITS(buf) :
 443                            EXTRACT_LE_32BITS(buf);
 444             x2 = reverse ? EXTRACT_32BITS(buf + 4) :
 445                            EXTRACT_LE_32BITS(buf + 4);
 446             if (x2)
 447                 printf("0x%08x:%08x", x2, x1);
 448             else
 449                 printf("%d (0x%08x%08x)", x1, x2, x1);
 450             buf += 8;
 451             fmt++;
 452             break;
 453           }
 454         case 'd':
 455           {
 456             unsigned int x;
 457             TCHECK2(buf[0], 2);
 458             x = reverse ? EXTRACT_16BITS(buf) :
 459                           EXTRACT_LE_16BITS(buf);
 460             printf("%d (0x%x)", x, x);
 461             buf += 2;
 462             fmt++;
 463             break;
 464           }
 465         case 'W':
 466           {
 467             unsigned int x;
 468             TCHECK2(buf[0], 4);
 469             x = reverse ? EXTRACT_32BITS(buf) :
 470                           EXTRACT_LE_32BITS(buf);
 471             printf("0x%X", x);
 472             buf += 4;
 473             fmt++;
 474             break;
 475           }
 476         case 'w':
 477           {
 478             unsigned int x;
 479             TCHECK2(buf[0], 2);
 480             x = reverse ? EXTRACT_16BITS(buf) :
 481                           EXTRACT_LE_16BITS(buf);
 482             printf("0x%X", x);
 483             buf += 2;
 484             fmt++;
 485             break;
 486           }
 487         case 'B':
 488           {
 489             unsigned int x;
 490             TCHECK(buf[0]);
 491             x = buf[0];
 492             printf("0x%X", x);
 493             buf += 1;
 494             fmt++;
 495             break;
 496           }
 497         case 'b':
 498           {
 499             unsigned int x;
 500             TCHECK(buf[0]);
 501             x = buf[0];
 502             printf("%u (0x%x)", x, x);
 503             buf += 1;
 504             fmt++;
 505             break;
 506           }
 507         case 'S':
 508           {
 509             /*XXX unistr() */
 510             printf("%.*s", (int)PTR_DIFF(maxbuf, buf), unistr(buf, &len));
 511             buf += len;
 512             fmt++;
 513             break;
 514           }
 515         case 'Z':
 516           {
 517             if (*buf != 4 && *buf != 2)
 518                 printf("Error! ASCIIZ buffer of type %u (safety=%lu)\n", *buf,
 519                     (unsigned long)PTR_DIFF(maxbuf, buf));
 520             printf("%.*s", (int)PTR_DIFF(maxbuf, buf + 1),
 521                 unistr(buf + 1, &len));
 522             buf += len + 1;
 523             fmt++;
 524             break;
 525           }
 526         case 's':
 527           {
 528             int l = atoi(fmt + 1);
 529             printf("%-*.*s", l, l, buf);
 530             buf += l;
 531             fmt++;
 532             while (isdigit(*fmt))
 533                 fmt++;
 534             break;
 535           }
 536         case 'h':
 537           {
 538             int l = atoi(fmt + 1);
 539             while (l--)
 540                 printf("%02x", *buf++);
 541             fmt++;
 542             while (isdigit(*fmt))
 543                 fmt++;
 544             break;
 545           }
 546         case 'n':
 547           {
 548             int t = atoi(fmt+1);
 549             char nbuf[255];
 550             int name_type;
 551             int len;
 552
 553             switch (t) {
 554             case 1:
 555                 name_type = name_extract(startbuf, PTR_DIFF(buf, startbuf),
 556                     maxbuf, nbuf);
 557                 if (name_type < 0)
 558                     goto trunc;
 559                 len = name_len(buf, maxbuf);
 560                 if (len < 0)
 561                     goto trunc;
 562                 buf += len;
 563                 printf("%-15.15s NameType=0x%02X (%s)", nbuf, name_type,
 564                     name_type_str(name_type));
 565                 break;
 566             case 2:
 567                 name_type = buf[15];
 568                 printf("%-15.15s NameType=0x%02X (%s)", buf, name_type,
 569                     name_type_str(name_type));
 570                 buf += 16;
 571                 break;
 572             }
 573             fmt++;
 574             while (isdigit(*fmt))
 575                 fmt++;
 576             break;
 577           }
 578         case 'T':
 579           {
 580             time_t t;
 581             int x;
 582             x = EXTRACT_LE_32BITS(buf);
 583
 584             switch (atoi(fmt + 1)) {
 585             case 1:
 586                 if (x == 0 || x == -1 || x == 0xFFFFFFFF)
 587                     t = 0;
 588                 else
 589                     t = make_unix_date(buf);
 590                 buf += 4;
 591                 break;
 592             case 2:
 593                 if (x == 0 || x == -1 || x == 0xFFFFFFFF)
 594                     t = 0;
 595                 else
 596                     t = make_unix_date2(buf);
 597                 buf += 4;
 598                 break;
 599             case 3:
 600                 t = interpret_long_date(buf);
 601                 buf += 8;
 602                 break;
 603             }
 604             printf("%s", t ? asctime(localtime(&t)) : "NULL\n");
 605             fmt++;
 606             while (isdigit(*fmt))
 607                 fmt++;
 608             break;
 609           }
 610         default:
 611             putchar(*fmt);
 612             fmt++;
 613             break;
 614         }
 615     }
 616
 617     if (buf >= maxbuf && *fmt)
 618         printf("END OF BUFFER\n");
 619
 620     return(buf);
 621
 622 trunc:
 623     printf("\n");
 624     printf("WARNING: Short packet. Try increasing the snap length\n");
 625     return(NULL);
 626 }
 627
 628 const u_char *
 629 smb_fdata(const u_char *buf, const char *fmt, const u_char *maxbuf)
 630 {
 631     static int depth = 0;
 632     char s[128];
 633     char *p;
 634
 635     while (*fmt) {
 636         switch (*fmt) {
 637         case '*':
 638             fmt++;
 639             while (buf < maxbuf) {
 640                 const u_char *buf2;
 641                 depth++;
 642                 buf2 = smb_fdata(buf, fmt, maxbuf);
 643                 depth--;
 644                 if (buf2 == NULL)
 645                     return(NULL);
 646                 if (buf2 == buf)
 647                     return(buf);
 648                 buf = buf2;
 649             }
 650             return(buf);
 651
 652         case '|':
 653             fmt++;
 654             if (buf >= maxbuf)
 655                 return(buf);
 656             break;
 657
 658         case '%':
 659             fmt++;
 660             buf = maxbuf;
 661             break;
 662
 663         case '#':
 664             fmt++;
 665             return(buf);
 666             break;
 667
 668         case '[':
 669             fmt++;
 670             if (buf >= maxbuf)
 671                 return(buf);
 672             memset(s, 0, sizeof(s));
 673             p = strchr(fmt, ']');
 674             if (p - fmt + 1 > sizeof(s)) {
 675                 /* overrun */
 676                 return(buf);
 677             }
 678             strncpy(s, fmt, p - fmt);
 679             s[p - fmt] = '\0';
 680             fmt = p + 1;
 681             buf = smb_fdata1(buf, s, maxbuf);
 682             if (buf == NULL)
 683                 return(NULL);
 684             break;
 685
 686         default:
 687             putchar(*fmt);
 688             fmt++;
 689             fflush(stdout);
 690             break;
 691         }
 692     }
 693     if (!depth && buf < maxbuf) {
 694         size_t len = PTR_DIFF(maxbuf, buf);
 695         printf("Data: (%lu bytes)\n", (unsigned long)len);
 696         print_data(buf, len);
 697         return(buf + len);
 698     }
 699     return(buf);
 700 }
 701
 702 typedef struct {
 703     const char *name;
 704     int code;
 705     const char *message;
 706 } err_code_struct;
 707
 708 /* Dos Error Messages */
 709 static err_code_struct dos_msgs[] = {
 710     { "ERRbadfunc", 1, "Invalid function." },
 711     { "ERRbadfile", 2, "File not found." },
 712     { "ERRbadpath", 3, "Directory invalid." },
 713     { "ERRnofids", 4, "No file descriptors available" },
 714     { "ERRnoaccess", 5, "Access denied." },
 715     { "ERRbadfid", 6, "Invalid file handle." },
 716     { "ERRbadmcb", 7, "Memory control blocks destroyed." },
 717     { "ERRnomem", 8, "Insufficient server memory to perform the requested function." },
 718     { "ERRbadmem", 9, "Invalid memory block address." },
 719     { "ERRbadenv", 10, "Invalid environment." },
 720     { "ERRbadformat", 11, "Invalid format." },
 721     { "ERRbadaccess", 12, "Invalid open mode." },
 722     { "ERRbaddata", 13, "Invalid data." },
 723     { "ERR", 14, "reserved." },
 724     { "ERRbaddrive", 15, "Invalid drive specified." },
 725     { "ERRremcd", 16, "A Delete Directory request attempted  to  remove  the  server's  current directory." },
 726     { "ERRdiffdevice", 17, "Not same device." },
 727     { "ERRnofiles", 18, "A File Search command can find no more files matching the specified criteria." },
 728     { "ERRbadshare", 32, "The sharing mode specified for an Open conflicts with existing  FIDs  on the file." },
 729     { "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." },
 730     { "ERRfilexists", 80, "The file named in a Create Directory,  Make  New  File  or  Link  request already exists." },
 731     { "ERRbadpipe", 230, "Pipe invalid." },
 732     { "ERRpipebusy", 231, "All instances of the requested pipe are busy." },
 733     { "ERRpipeclosing", 232, "Pipe close in progress." },
 734     { "ERRnotconnected", 233, "No process on other end of pipe." },
 735     { "ERRmoredata", 234, "There is more data to be returned." },
 736     { NULL, -1, NULL }
 737  };
 738
 739 /* Server Error Messages */
 740 err_code_struct server_msgs[] = {
 741     { "ERRerror", 1, "Non-specific error code." },
 742     { "ERRbadpw", 2, "Bad password - name/password pair in a Tree Connect or Session Setup are invalid." },
 743     { "ERRbadtype", 3, "reserved." },
 744     { "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." },
 745     { "ERRinvnid", 5, "The tree ID (TID) specified in a command was invalid." },
 746     { "ERRinvnetname", 6, "Invalid network name in tree connect." },
 747     { "ERRinvdevice", 7, "Invalid device - printer request made to non-printer connection or  non-printer request made to printer connection." },
 748     { "ERRqfull", 49, "Print queue full (files) -- returned by open print file." },
 749     { "ERRqtoobig", 50, "Print queue full -- no space." },
 750     { "ERRqeof", 51, "EOF on print queue dump." },
 751     { "ERRinvpfid", 52, "Invalid print file FID." },
 752     { "ERRsmbcmd", 64, "The server did not recognize the command received." },
 753     { "ERRsrverror", 65, "The server encountered an internal error,  e.g.,  system file unavailable." },
 754     { "ERRfilespecs", 67, "The file handle (FID) and pathname parameters contained an invalid  combination of values." },
 755     { "ERRreserved", 68, "reserved." },
 756     { "ERRbadpermits", 69, "The access permissions specified for a file or directory are not a valid combination.  The server cannot set the requested attribute." },
 757     { "ERRreserved", 70, "reserved." },
 758     { "ERRsetattrmode", 71, "The attribute mode in the Set File Attribute request is invalid." },
 759     { "ERRpaused", 81, "Server is paused." },
 760     { "ERRmsgoff", 82, "Not receiving messages." },
 761     { "ERRnoroom", 83, "No room to buffer message." },
 762     { "ERRrmuns", 87, "Too many remote user names." },
 763     { "ERRtimeout", 88, "Operation timed out." },
 764     { "ERRnoresource", 89, "No resources currently available for request." },
 765     { "ERRtoomanyuids", 90, "Too many UIDs active on this session." },
 766     { "ERRbaduid", 91, "The UID is not known as a valid ID on this session." },
 767     { "ERRusempx", 250, "Temp unable to support Raw,  use MPX mode." },
 768     { "ERRusestd", 251, "Temp unable to support Raw,  use standard read/write." },
 769     { "ERRcontmpx", 252, "Continue in MPX mode." },
 770     { "ERRreserved", 253, "reserved." },
 771     { "ERRreserved", 254, "reserved." },
 772     { "ERRnosupport", 0xFFFF, "Function not supported." },
 773     { NULL, -1, NULL }
 774 };
 775
 776 /* Hard Error Messages */
 777 err_code_struct hard_msgs[] = {
 778     { "ERRnowrite", 19, "Attempt to write on write-protected diskette." },
 779     { "ERRbadunit", 20, "Unknown unit." },
 780     { "ERRnotready", 21, "Drive not ready." },
 781     { "ERRbadcmd", 22, "Unknown command." },
 782     { "ERRdata", 23, "Data error (CRC)." },
 783     { "ERRbadreq", 24, "Bad request structure length." },
 784     { "ERRseek", 25 , "Seek error." },
 785     { "ERRbadmedia", 26, "Unknown media type." },
 786     { "ERRbadsector", 27, "Sector not found." },
 787     { "ERRnopaper", 28, "Printer out of paper." },
 788     { "ERRwrite", 29, "Write fault." },
 789     { "ERRread", 30, "Read fault." },
 790     { "ERRgeneral", 31, "General failure." },
 791     { "ERRbadshare", 32, "A open conflicts with an existing open." },
 792     { "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." },
 793     { "ERRwrongdisk", 34, "The wrong disk was found in a drive." },
 794     { "ERRFCBUnavail", 35, "No FCBs are available to process request." },
 795     { "ERRsharebufexc", 36, "A sharing buffer has been exceeded." },
 796     { NULL, -1, NULL }
 797 };
 798
 799 static struct {
 800     int code;
 801     char *class;
 802     err_code_struct *err_msgs;
 803 } err_classes[] = {
 804     { 0, "SUCCESS", NULL },
 805     { 0x01, "ERRDOS", dos_msgs },
 806     { 0x02, "ERRSRV", server_msgs },
 807     { 0x03, "ERRHRD", hard_msgs },
 808     { 0x04, "ERRXOS", NULL },
 809     { 0xE1, "ERRRMX1", NULL },
 810     { 0xE2, "ERRRMX2", NULL },
 811     { 0xE3, "ERRRMX3", NULL },
 812     { 0xFF, "ERRCMD", NULL },
 813     { -1, NULL, NULL }
 814 };
 815
 816 /*
 817  * return a SMB error string from a SMB buffer
 818  */
 819 char *
 820 smb_errstr(int class, int num)
 821 {
 822     static char ret[128];
 823     int i, j;
 824
 825     ret[0] = 0;
 826
 827     for (i = 0; err_classes[i].class; i++)
 828         if (err_classes[i].code == class) {
 829             if (err_classes[i].err_msgs) {
 830                 err_code_struct *err = err_classes[i].err_msgs;
 831                 for (j = 0; err[j].name; j++)
 832                     if (num == err[j].code) {
 833                         snprintf(ret, sizeof(ret), "%s - %s (%s)",
 834                             err_classes[i].class, err[j].name, err[j].message);
 835                         return ret;
 836                     }
 837             }
 838
 839             snprintf(ret, sizeof(ret), "%s - %d", err_classes[i].class, num);
 840             return ret;
 841         }
 842
 843     snprintf(ret, sizeof(ret), "ERROR: Unknown error (%d,%d)", class, num);
 844     return(ret);
 845 }