source3/lib/util_str.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4
   5    Copyright (C) Andrew Tridgell 1992-2001
   6    Copyright (C) Simo Sorce      2001-2002
   7    Copyright (C) Martin Pool     2003
   8    Copyright (C) James Peach     2006
   9    Copyright (C) Jeremy Allison  1992-2007
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "lib/param/loadparm.h"
  27
  28 const char toupper_ascii_fast_table[128] = {
  29         0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf,
  30         0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
  31         0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
  32         0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
  33         0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
  34         0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
  35         0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
  36         0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f
  37 };
  38
  39 /**
  40  * Compare 2 strings up to and including the nth char.
  41  *
  42  * @note The comparison is case-insensitive.
  43  **/
  44 bool strnequal(const char *s1,const char *s2,size_t n)
  45 {
  46         if (s1 == s2)
  47                 return(true);
  48         if (!s1 || !s2 || !n)
  49                 return(false);
  50
  51         return(strncasecmp_m(s1,s2,n)==0);
  52 }
  53
  54 /**
  55  Convert a string to "normal" form.
  56 **/
  57
  58 void strnorm(char *s, int case_default)
  59 {
  60         if (case_default == CASE_UPPER)
  61                 strupper_m(s);
  62         else
  63                 strlower_m(s);
  64 }
  65
  66 /**
  67  *  Skip past some strings in a buffer - old version - no checks.
  68  *  **/
  69
  70 char *push_skip_string(char *buf)
  71 {
  72         buf += strlen(buf) + 1;
  73         return(buf);
  74 }
  75
  76 /**
  77  Skip past a string in a buffer. Buffer may not be
  78  null terminated. end_ptr points to the first byte after
  79  then end of the buffer.
  80 **/
  81
  82 char *skip_string(const char *base, size_t len, char *buf)
  83 {
  84         const char *end_ptr = base + len;
  85
  86         if (end_ptr < base || !base || !buf || buf >= end_ptr) {
  87                 return NULL;
  88         }
  89
  90         /* Skip the string */
  91         while (*buf) {
  92                 buf++;
  93                 if (buf >= end_ptr) {
  94                         return NULL;
  95                 }
  96         }
  97         /* Skip the '\0' */
  98         buf++;
  99         return buf;
 100 }
 101
 102 /**
 103  Count the number of characters in a string. Normally this will
 104  be the same as the number of bytes in a string for single byte strings,
 105  but will be different for multibyte.
 106 **/
 107
 108 size_t str_charnum(const char *s)
 109 {
 110         size_t ret, converted_size;
 111         smb_ucs2_t *tmpbuf2 = NULL;
 112         if (!push_ucs2_talloc(talloc_tos(), &tmpbuf2, s, &converted_size)) {
 113                 return 0;
 114         }
 115         ret = strlen_w(tmpbuf2);
 116         TALLOC_FREE(tmpbuf2);
 117         return ret;
 118 }
 119
 120 bool trim_char(char *s,char cfront,char cback)
 121 {
 122         bool ret = false;
 123         char *ep;
 124         char *fp = s;
 125
 126         /* Ignore null or empty strings. */
 127         if (!s || (s[0] == '\0'))
 128                 return false;
 129
 130         if (cfront) {
 131                 while (*fp && *fp == cfront)
 132                         fp++;
 133                 if (!*fp) {
 134                         /* We ate the string. */
 135                         s[0] = '\0';
 136                         return true;
 137                 }
 138                 if (fp != s)
 139                         ret = true;
 140         }
 141
 142         ep = fp + strlen(fp) - 1;
 143         if (cback) {
 144                 /* Attempt ascii only. Bail for mb strings. */
 145                 while ((ep >= fp) && (*ep == cback)) {
 146                         ret = true;
 147                         if ((ep > fp) && (((unsigned char)ep[-1]) & 0x80)) {
 148                                 /* Could be mb... bail back to tim_string. */
 149                                 char fs[2], bs[2];
 150                                 if (cfront) {
 151                                         fs[0] = cfront;
 152                                         fs[1] = '\0';
 153                                 }
 154                                 bs[0] = cback;
 155                                 bs[1] = '\0';
 156                                 return trim_string(s, cfront ? fs : NULL, bs);
 157                         } else {
 158                                 ep--;
 159                         }
 160                 }
 161                 if (ep < fp) {
 162                         /* We ate the string. */
 163                         s[0] = '\0';
 164                         return true;
 165                 }
 166         }
 167
 168         ep[1] = '\0';
 169         memmove(s, fp, ep-fp+2);
 170         return ret;
 171 }
 172
 173 /**
 174  Like strncpy but always null terminates. Make sure there is room!
 175  The variable n should always be one less than the available size.
 176 **/
 177 char *StrnCpy(char *dest,const char *src,size_t n)
 178 {
 179         char *d = dest;
 180
 181         if (!dest) {
 182                 smb_panic("ERROR: NULL dest in StrnCpy");
 183         }
 184
 185         if (!src) {
 186                 *dest = 0;
 187                 return(dest);
 188         }
 189
 190         while (n-- && (*d = *src)) {
 191                 d++;
 192                 src++;
 193         }
 194
 195         *d = 0;
 196         return(dest);
 197 }
 198
 199 /**
 200  Check if a string is part of a list.
 201 **/
 202
 203 bool in_list(const char *s, const char *list, bool casesensitive)
 204 {
 205         char *tok = NULL;
 206         bool ret = false;
 207         TALLOC_CTX *frame;
 208
 209         if (!list) {
 210                 return false;
 211         }
 212
 213         frame = talloc_stackframe();
 214         while (next_token_talloc(frame, &list, &tok,LIST_SEP)) {
 215                 if (casesensitive) {
 216                         if (strcmp(tok,s) == 0) {
 217                                 ret = true;
 218                                 break;
 219                         }
 220                 } else {
 221                         if (strcasecmp_m(tok,s) == 0) {
 222                                 ret = true;
 223                                 break;
 224                         }
 225                 }
 226         }
 227         TALLOC_FREE(frame);
 228         return ret;
 229 }
 230
 231 /*
 232  * Internal guts of talloc_string_sub and talloc_all_string_sub.
 233  * talloc version of string_sub2.
 234  */
 235
 236 char *talloc_string_sub2(TALLOC_CTX *mem_ctx, const char *src,
 237                         const char *pattern,
 238                         const char *insert,
 239                         bool remove_unsafe_characters,
 240                         bool replace_once,
 241                         bool allow_trailing_dollar)
 242 {
 243         char *p, *in;
 244         char *s;
 245         char *string;
 246         ssize_t ls,lp,li,ld, i;
 247
 248         if (!insert || !pattern || !*pattern || !src) {
 249                 return NULL;
 250         }
 251
 252         string = talloc_strdup(mem_ctx, src);
 253         if (string == NULL) {
 254                 DEBUG(0, ("talloc_string_sub2: "
 255                         "talloc_strdup failed\n"));
 256                 return NULL;
 257         }
 258
 259         s = string;
 260
 261         in = talloc_strdup(mem_ctx, insert);
 262         if (!in) {
 263                 DEBUG(0, ("talloc_string_sub2: ENOMEM\n"));
 264                 return NULL;
 265         }
 266         ls = (ssize_t)strlen(s);
 267         lp = (ssize_t)strlen(pattern);
 268         li = (ssize_t)strlen(insert);
 269         ld = li - lp;
 270
 271         for (i=0;i<li;i++) {
 272                 switch (in[i]) {
 273                         case '$':
 274                                 /* allow a trailing $
 275                                  * (as in machine accounts) */
 276                                 if (allow_trailing_dollar && (i == li - 1 )) {
 277                                         break;
 278                                 }
 279                         case '`':
 280                         case '"':
 281                         case '\'':
 282                         case ';':
 283                         case '%':
 284                         case '\r':
 285                         case '\n':
 286                                 if (remove_unsafe_characters) {
 287                                         in[i] = '_';
 288                                         break;
 289                                 }
 290                         default:
 291                                 /* ok */
 292                                 break;
 293                 }
 294         }
 295
 296         while ((p = strstr_m(s,pattern))) {
 297                 if (ld > 0) {
 298                         int offset = PTR_DIFF(s,string);
 299                         string = (char *)TALLOC_REALLOC(mem_ctx, string,
 300                                                         ls + ld + 1);
 301                         if (!string) {
 302                                 DEBUG(0, ("talloc_string_sub: out of "
 303                                           "memory!\n"));
 304                                 TALLOC_FREE(in);
 305                                 return NULL;
 306                         }
 307                         p = string + offset + (p - s);
 308                 }
 309                 if (li != lp) {
 310                         memmove(p+li,p+lp,strlen(p+lp)+1);
 311                 }
 312                 memcpy(p, in, li);
 313                 s = p + li;
 314                 ls += ld;
 315
 316                 if (replace_once) {
 317                         break;
 318                 }
 319         }
 320         TALLOC_FREE(in);
 321         return string;
 322 }
 323
 324 /* Same as string_sub, but returns a talloc'ed string */
 325
 326 char *talloc_string_sub(TALLOC_CTX *mem_ctx,
 327                         const char *src,
 328                         const char *pattern,
 329                         const char *insert)
 330 {
 331         return talloc_string_sub2(mem_ctx, src, pattern, insert,
 332                         true, false, false);
 333 }
 334
 335 char *talloc_all_string_sub(TALLOC_CTX *ctx,
 336                                 const char *src,
 337                                 const char *pattern,
 338                                 const char *insert)
 339 {
 340         return talloc_string_sub2(ctx, src, pattern, insert,
 341                         false, false, false);
 342 }
 343
 344 /**
 345  Write an octal as a string.
 346 **/
 347
 348 char *octal_string(int i)
 349 {
 350         char *result;
 351         if (i == -1) {
 352                 result = talloc_strdup(talloc_tos(), "-1");
 353         }
 354         else {
 355                 result = talloc_asprintf(talloc_tos(), "0%o", i);
 356         }
 357         SMB_ASSERT(result != NULL);
 358         return result;
 359 }
 360
 361
 362 /**
 363  Truncate a string at a specified length.
 364 **/
 365
 366 char *string_truncate(char *s, unsigned int length)
 367 {
 368         if (s && strlen(s) > length)
 369                 s[length] = 0;
 370         return s;
 371 }
 372
 373
 374 /***********************************************************************
 375  Return the equivalent of doing strrchr 'n' times - always going
 376  backwards.
 377 ***********************************************************************/
 378
 379 char *strnrchr_m(const char *s, char c, unsigned int n)
 380 {
 381         smb_ucs2_t *ws = NULL;
 382         char *s2 = NULL;
 383         smb_ucs2_t *p;
 384         char *ret;
 385         size_t converted_size;
 386
 387         if (!push_ucs2_talloc(talloc_tos(), &ws, s, &converted_size)) {
 388                 /* Too hard to try and get right. */
 389                 return NULL;
 390         }
 391         p = strnrchr_w(ws, UCS2_CHAR(c), n);
 392         if (!p) {
 393                 TALLOC_FREE(ws);
 394                 return NULL;
 395         }
 396         *p = 0;
 397         if (!pull_ucs2_talloc(talloc_tos(), &s2, ws, &converted_size)) {
 398                 TALLOC_FREE(ws);
 399                 /* Too hard to try and get right. */
 400                 return NULL;
 401         }
 402         ret = discard_const_p(char, (s+strlen(s2)));
 403         TALLOC_FREE(ws);
 404         TALLOC_FREE(s2);
 405         return ret;
 406 }
 407
 408 static bool unix_strlower(const char *src, size_t srclen, char *dest, size_t destlen)
 409 {
 410         size_t size;
 411         smb_ucs2_t *buffer = NULL;
 412         bool ret;
 413
 414         if (!convert_string_talloc(talloc_tos(), CH_UNIX, CH_UTF16LE, src, srclen,
 415                                    (void **)(void *)&buffer, &size))
 416         {
 417                 smb_panic("failed to create UCS2 buffer");
 418                 /* NOTREACHED. Yet. */
 419                 return false;
 420         }
 421         if (!strlower_w(buffer) && (dest == src)) {
 422                 TALLOC_FREE(buffer);
 423                 return true;
 424         }
 425         ret = convert_string(CH_UTF16LE, CH_UNIX, buffer, size, dest, destlen, &size);
 426         TALLOC_FREE(buffer);
 427         return ret;
 428 }
 429
 430 #if 0 /* Alternate function that avoid talloc calls for ASCII and non ASCII */
 431
 432 /**
 433  Convert a string to lower case.
 434 **/
 435 _PUBLIC_ void strlower_m(char *s)
 436 {
 437         char *d;
 438         struct smb_iconv_handle *iconv_handle;
 439
 440         iconv_handle = get_iconv_handle();
 441
 442         d = s;
 443
 444         while (*s) {
 445                 size_t c_size, c_size2;
 446                 codepoint_t c = next_codepoint_handle(iconv_handle, s, &c_size);
 447                 c_size2 = push_codepoint_handle(iconv_handle, d, tolower_m(c));
 448                 if (c_size2 > c_size) {
 449                         DEBUG(0,("FATAL: codepoint 0x%x (0x%x) expanded from %d to %d bytes in strlower_m\n",
 450                                  c, tolower_m(c), (int)c_size, (int)c_size2));
 451                         smb_panic("codepoint expansion in strlower_m\n");
 452                 }
 453                 s += c_size;
 454                 d += c_size2;
 455         }
 456         *d = 0;
 457 }
 458
 459 #endif
 460
 461 /**
 462  Convert a string to lower case.
 463 **/
 464
 465 void strlower_m(char *s)
 466 {
 467         size_t len;
 468         int errno_save;
 469
 470         /* this is quite a common operation, so we want it to be
 471            fast. We optimise for the ascii case, knowing that all our
 472            supported multi-byte character sets are ascii-compatible
 473            (ie. they match for the first 128 chars) */
 474
 475         while (*s && !(((unsigned char)s[0]) & 0x80)) {
 476                 *s = tolower_m((unsigned char)*s);
 477                 s++;
 478         }
 479
 480         if (!*s)
 481                 return;
 482
 483         /* I assume that lowercased string takes the same number of bytes
 484          * as source string even in UTF-8 encoding. (VIV) */
 485         len = strlen(s) + 1;
 486         errno_save = errno;
 487         errno = 0;
 488         unix_strlower(s,len,s,len);
 489         /* Catch mb conversion errors that may not terminate. */
 490         if (errno)
 491                 s[len-1] = '\0';
 492         errno = errno_save;
 493 }
 494
 495 static bool unix_strupper(const char *src, size_t srclen, char *dest, size_t destlen)
 496 {
 497         size_t size;
 498         smb_ucs2_t *buffer;
 499         bool ret;
 500
 501         if (!push_ucs2_talloc(talloc_tos(), &buffer, src, &size)) {
 502                 return false;
 503         }
 504
 505         if (!strupper_w(buffer) && (dest == src)) {
 506                 TALLOC_FREE(buffer);
 507                 return true;
 508         }
 509
 510         ret = convert_string(CH_UTF16LE, CH_UNIX, buffer, size, dest, destlen, &size);
 511         TALLOC_FREE(buffer);
 512         return ret;
 513 }
 514
 515 #if 0 /* Alternate function that avoid talloc calls for ASCII and non ASCII */
 516
 517 /**
 518  Convert a string to UPPER case.
 519 **/
 520 _PUBLIC_ void strupper_m(char *s)
 521 {
 522         char *d;
 523         struct smb_iconv_handle *iconv_handle;
 524
 525         iconv_handle = get_iconv_handle();
 526
 527         d = s;
 528
 529         while (*s) {
 530                 size_t c_size, c_size2;
 531                 codepoint_t c = next_codepoint_handle(iconv_handle, s, &c_size);
 532                 c_size2 = push_codepoint_handle(iconv_handle, d, toupper_m(c));
 533                 if (c_size2 > c_size) {
 534                         DEBUG(0,("FATAL: codepoint 0x%x (0x%x) expanded from %d to %d bytes in strupper_m\n",
 535                                  c, toupper_m(c), (int)c_size, (int)c_size2));
 536                         smb_panic("codepoint expansion in strupper_m\n");
 537                 }
 538                 s += c_size;
 539                 d += c_size2;
 540         }
 541         *d = 0;
 542 }
 543
 544 #endif
 545
 546 /**
 547  Convert a string to upper case.
 548 **/
 549
 550 bool strupper_m(char *s)
 551 {
 552         size_t len;
 553         int errno_save;
 554         bool ret = false;
 555
 556         /* this is quite a common operation, so we want it to be
 557            fast. We optimise for the ascii case, knowing that all our
 558            supported multi-byte character sets are ascii-compatible
 559            (ie. they match for the first 128 chars) */
 560
 561         while (*s && !(((unsigned char)s[0]) & 0x80)) {
 562                 *s = toupper_ascii_fast((unsigned char)*s);
 563                 s++;
 564         }
 565
 566         if (!*s)
 567                 return true;
 568
 569         /* I assume that lowercased string takes the same number of bytes
 570          * as source string even in multibyte encoding. (VIV) */
 571         len = strlen(s) + 1;
 572         errno_save = errno;
 573         errno = 0;
 574         ret = unix_strupper(s,len,s,len);
 575         /* Catch mb conversion errors that may not terminate. */
 576         if (errno) {
 577                 s[len-1] = '\0';
 578                 ret = false;
 579         }
 580         errno = errno_save;
 581         return ret;
 582 }
 583
 584 /**
 585  Just a typesafety wrapper for snprintf into a fstring.
 586 **/
 587
 588 int fstr_sprintf(fstring s, const char *fmt, ...)
 589 {
 590         va_list ap;
 591         int ret;
 592
 593         va_start(ap, fmt);
 594         ret = vsnprintf(s, FSTRING_LEN, fmt, ap);
 595         va_end(ap);
 596         return ret;
 597 }
 598
 599 /**
 600  List of Strings manipulation functions
 601 **/
 602
 603 #define S_LIST_ABS 16 /* List Allocation Block Size */
 604
 605 /******************************************************************************
 606  substitute a specific pattern in a string list
 607  *****************************************************************************/
 608
 609 bool str_list_substitute(char **list, const char *pattern, const char *insert)
 610 {
 611         TALLOC_CTX *ctx = list;
 612         char *p, *s, *t;
 613         ssize_t ls, lp, li, ld, i, d;
 614
 615         if (!list)
 616                 return false;
 617         if (!pattern)
 618                 return false;
 619         if (!insert)
 620                 return false;
 621
 622         lp = (ssize_t)strlen(pattern);
 623         li = (ssize_t)strlen(insert);
 624         ld = li -lp;
 625
 626         while (*list) {
 627                 s = *list;
 628                 ls = (ssize_t)strlen(s);
 629
 630                 while ((p = strstr_m(s, pattern))) {
 631                         t = *list;
 632                         d = p -t;
 633                         if (ld) {
 634                                 t = talloc_array(ctx, char, ls +ld +1);
 635                                 if (!t) {
 636                                         DEBUG(0,("str_list_substitute: "
 637                                                 "Unable to allocate memory"));
 638                                         return false;
 639                                 }
 640                                 memcpy(t, *list, d);
 641                                 memcpy(t +d +li, p +lp, ls -d -lp +1);
 642                                 TALLOC_FREE(*list);
 643                                 *list = t;
 644                                 ls += ld;
 645                                 s = t +d +li;
 646                         }
 647
 648                         for (i = 0; i < li; i++) {
 649                                 switch (insert[i]) {
 650                                         case '`':
 651                                         case '"':
 652                                         case '\'':
 653                                         case ';':
 654                                         case '$':
 655                                         case '%':
 656                                         case '\r':
 657                                         case '\n':
 658                                                 t[d +i] = '_';
 659                                                 break;
 660                                         default:
 661                                                 t[d +i] = insert[i];
 662                                 }
 663                         }
 664                 }
 665
 666                 list++;
 667         }
 668
 669         return true;
 670 }
 671
 672
 673 #define IPSTR_LIST_SEP  ","
 674 #define IPSTR_LIST_CHAR ','
 675
 676 /**
 677  * Add ip string representation to ipstr list. Used also
 678  * as part of @function ipstr_list_make
 679  *
 680  * @param ipstr_list pointer to string containing ip list;
 681  *        MUST BE already allocated and IS reallocated if necessary
 682  * @param ipstr_size pointer to current size of ipstr_list (might be changed
 683  *        as a result of reallocation)
 684  * @param ip IP address which is to be added to list
 685  * @return pointer to string appended with new ip and possibly
 686  *         reallocated to new length
 687  **/
 688
 689 static char *ipstr_list_add(char **ipstr_list, const struct ip_service *service)
 690 {
 691         char *new_ipstr = NULL;
 692         char addr_buf[INET6_ADDRSTRLEN];
 693         int ret;
 694
 695         /* arguments checking */
 696         if (!ipstr_list || !service) {
 697                 return NULL;
 698         }
 699
 700         print_sockaddr(addr_buf,
 701                         sizeof(addr_buf),
 702                         &service->ss);
 703
 704         /* attempt to convert ip to a string and append colon separator to it */
 705         if (*ipstr_list) {
 706                 if (service->ss.ss_family == AF_INET) {
 707                         /* IPv4 */
 708                         ret = asprintf(&new_ipstr, "%s%s%s:%d", *ipstr_list,
 709                                        IPSTR_LIST_SEP, addr_buf,
 710                                        service->port);
 711                 } else {
 712                         /* IPv6 */
 713                         ret = asprintf(&new_ipstr, "%s%s[%s]:%d", *ipstr_list,
 714                                        IPSTR_LIST_SEP, addr_buf,
 715                                        service->port);
 716                 }
 717                 SAFE_FREE(*ipstr_list);
 718         } else {
 719                 if (service->ss.ss_family == AF_INET) {
 720                         /* IPv4 */
 721                         ret = asprintf(&new_ipstr, "%s:%d", addr_buf,
 722                                        service->port);
 723                 } else {
 724                         /* IPv6 */
 725                         ret = asprintf(&new_ipstr, "[%s]:%d", addr_buf,
 726                                        service->port);
 727                 }
 728         }
 729         if (ret == -1) {
 730                 return NULL;
 731         }
 732         *ipstr_list = new_ipstr;
 733         return *ipstr_list;
 734 }
 735
 736 /**
 737  * Allocate and initialise an ipstr list using ip adresses
 738  * passed as arguments.
 739  *
 740  * @param ipstr_list pointer to string meant to be allocated and set
 741  * @param ip_list array of ip addresses to place in the list
 742  * @param ip_count number of addresses stored in ip_list
 743  * @return pointer to allocated ip string
 744  **/
 745
 746 char *ipstr_list_make(char **ipstr_list,
 747                         const struct ip_service *ip_list,
 748                         int ip_count)
 749 {
 750         int i;
 751
 752         /* arguments checking */
 753         if (!ip_list || !ipstr_list) {
 754                 return 0;
 755         }
 756
 757         *ipstr_list = NULL;
 758
 759         /* process ip addresses given as arguments */
 760         for (i = 0; i < ip_count; i++) {
 761                 *ipstr_list = ipstr_list_add(ipstr_list, &ip_list[i]);
 762         }
 763
 764         return (*ipstr_list);
 765 }
 766
 767
 768 /**
 769  * Parse given ip string list into array of ip addresses
 770  * (as ip_service structures)
 771  *    e.g. [IPv6]:port,192.168.1.100:389,192.168.1.78, ...
 772  *
 773  * @param ipstr ip string list to be parsed
 774  * @param ip_list pointer to array of ip addresses which is
 775  *        allocated by this function and must be freed by caller
 776  * @return number of successfully parsed addresses
 777  **/
 778
 779 int ipstr_list_parse(const char *ipstr_list, struct ip_service **ip_list)
 780 {
 781         TALLOC_CTX *frame;
 782         char *token_str = NULL;
 783         size_t count;
 784         int i;
 785
 786         if (!ipstr_list || !ip_list)
 787                 return 0;
 788
 789         count = count_chars(ipstr_list, IPSTR_LIST_CHAR) + 1;
 790         if ( (*ip_list = SMB_MALLOC_ARRAY(struct ip_service, count)) == NULL ) {
 791                 DEBUG(0,("ipstr_list_parse: malloc failed for %lu entries\n",
 792                                         (unsigned long)count));
 793                 return 0;
 794         }
 795
 796         frame = talloc_stackframe();
 797         for ( i=0; next_token_talloc(frame, &ipstr_list, &token_str,
 798                                 IPSTR_LIST_SEP) && i<count; i++ ) {
 799                 char *s = token_str;
 800                 char *p = strrchr(token_str, ':');
 801
 802                 if (p) {
 803                         *p = 0;
 804                         (*ip_list)[i].port = atoi(p+1);
 805                 }
 806
 807                 /* convert single token to ip address */
 808                 if (token_str[0] == '[') {
 809                         /* IPv6 address. */
 810                         s++;
 811                         p = strchr(token_str, ']');
 812                         if (!p) {
 813                                 continue;
 814                         }
 815                         *p = '\0';
 816                 }
 817                 if (!interpret_string_addr(&(*ip_list)[i].ss,
 818                                         s,
 819                                         AI_NUMERICHOST)) {
 820                         continue;
 821                 }
 822         }
 823         TALLOC_FREE(frame);
 824         return count;
 825 }
 826
 827 /**
 828  * Safely free ip string list
 829  *
 830  * @param ipstr_list ip string list to be freed
 831  **/
 832
 833 void ipstr_list_free(char* ipstr_list)
 834 {
 835         SAFE_FREE(ipstr_list);
 836 }
 837
 838 /* read a SMB_BIG_UINT from a string */
 839 uint64_t STR_TO_SMB_BIG_UINT(const char *nptr, const char **entptr)
 840 {
 841
 842         uint64_t val = (uint64_t)-1;
 843         const char *p = nptr;
 844
 845         if (!p) {
 846                 if (entptr) {
 847                         *entptr = p;
 848                 }
 849                 return val;
 850         }
 851
 852         while (*p && isspace(*p))
 853                 p++;
 854
 855         sscanf(p,"%"PRIu64,&val);
 856         if (entptr) {
 857                 while (*p && isdigit(*p))
 858                         p++;
 859                 *entptr = p;
 860         }
 861
 862         return val;
 863 }
 864
 865 /* Convert a size specification to a count of bytes. We accept the following
 866  * suffixes:
 867  *          bytes if there is no suffix
 868  *      kK  kibibytes
 869  *      mM  mebibytes
 870  *      gG  gibibytes
 871  *      tT  tibibytes
 872  *      pP  whatever the ISO name for petabytes is
 873  *
 874  *  Returns 0 if the string can't be converted.
 875  */
 876 uint64_t conv_str_size(const char * str)
 877 {
 878         uint64_t lval;
 879         char * end;
 880
 881         if (str == NULL || *str == '\0') {
 882                 return 0;
 883         }
 884
 885         lval = strtoull(str, &end, 10 /* base */);
 886
 887         if (end == NULL || end == str) {
 888                 return 0;
 889         }
 890
 891         if (*end == '\0') {
 892                 return lval;
 893         }
 894
 895         if (strwicmp(end, "K") == 0) {
 896                 lval *= 1024ULL;
 897         } else if (strwicmp(end, "M") == 0) {
 898                 lval *= (1024ULL * 1024ULL);
 899         } else if (strwicmp(end, "G") == 0) {
 900                 lval *= (1024ULL * 1024ULL *
 901                          1024ULL);
 902         } else if (strwicmp(end, "T") == 0) {
 903                 lval *= (1024ULL * 1024ULL *
 904                          1024ULL * 1024ULL);
 905         } else if (strwicmp(end, "P") == 0) {
 906                 lval *= (1024ULL * 1024ULL *
 907                          1024ULL * 1024ULL *
 908                          1024ULL);
 909         } else {
 910                 return 0;
 911         }
 912
 913         return lval;
 914 }
 915
 916 /* Append an sprintf'ed string. Double buffer size on demand. Usable without
 917  * error checking in between. The indiation that something weird happened is
 918  * string==NULL */
 919
 920 void sprintf_append(TALLOC_CTX *mem_ctx, char **string, ssize_t *len,
 921                     size_t *bufsize, const char *fmt, ...)
 922 {
 923         va_list ap;
 924         char *newstr;
 925         int ret;
 926         bool increased;
 927
 928         /* len<0 is an internal marker that something failed */
 929         if (*len < 0)
 930                 goto error;
 931
 932         if (*string == NULL) {
 933                 if (*bufsize == 0)
 934                         *bufsize = 128;
 935
 936                 *string = talloc_array(mem_ctx, char, *bufsize);
 937                 if (*string == NULL)
 938                         goto error;
 939         }
 940
 941         va_start(ap, fmt);
 942         ret = vasprintf(&newstr, fmt, ap);
 943         va_end(ap);
 944
 945         if (ret < 0)
 946                 goto error;
 947
 948         increased = false;
 949
 950         while ((*len)+ret >= *bufsize) {
 951                 increased = true;
 952                 *bufsize *= 2;
 953                 if (*bufsize >= (1024*1024*256))
 954                         goto error;
 955         }
 956
 957         if (increased) {
 958                 *string = talloc_realloc(mem_ctx, *string, char,
 959                                                *bufsize);
 960                 if (*string == NULL) {
 961                         goto error;
 962                 }
 963         }
 964
 965         StrnCpy((*string)+(*len), newstr, ret);
 966         (*len) += ret;
 967         free(newstr);
 968         return;
 969
 970  error:
 971         *len = -1;
 972         *string = NULL;
 973 }
 974
 975 /*
 976  * asprintf into a string and strupper_m it after that.
 977  */
 978
 979 int asprintf_strupper_m(char **strp, const char *fmt, ...)
 980 {
 981         va_list ap;
 982         char *result;
 983         int ret;
 984
 985         va_start(ap, fmt);
 986         ret = vasprintf(&result, fmt, ap);
 987         va_end(ap);
 988
 989         if (ret == -1)
 990                 return -1;
 991
 992         strupper_m(result);
 993         *strp = result;
 994         return ret;
 995 }
 996
 997 char *talloc_asprintf_strupper_m(TALLOC_CTX *t, const char *fmt, ...)
 998 {
 999         va_list ap;
1000         char *ret;
1001
1002         va_start(ap, fmt);
1003         ret = talloc_vasprintf(t, fmt, ap);
1004         va_end(ap);
1005
1006         if (ret == NULL) {
1007                 return NULL;
1008         }
1009         strupper_m(ret);
1010         return ret;
1011 }
1012
1013 char *talloc_asprintf_strlower_m(TALLOC_CTX *t, const char *fmt, ...)
1014 {
1015         va_list ap;
1016         char *ret;
1017
1018         va_start(ap, fmt);
1019         ret = talloc_vasprintf(t, fmt, ap);
1020         va_end(ap);
1021
1022         if (ret == NULL) {
1023                 return NULL;
1024         }
1025         strlower_m(ret);
1026         return ret;
1027 }
1028
1029
1030 /********************************************************************
1031  Check a string for any occurrences of a specified list of invalid
1032  characters.
1033 ********************************************************************/
1034
1035 bool validate_net_name( const char *name,
1036                 const char *invalid_chars,
1037                 int max_len)
1038 {
1039         int i;
1040
1041         if (!name) {
1042                 return false;
1043         }
1044
1045         for ( i=0; i<max_len && name[i]; i++ ) {
1046                 /* fail if strchr_m() finds one of the invalid characters */
1047                 if ( name[i] && strchr_m( invalid_chars, name[i] ) ) {
1048                         return false;
1049                 }
1050         }
1051
1052         return true;
1053 }
1054
1055
1056 /*******************************************************************
1057  Add a shell escape character '\' to any character not in a known list
1058  of characters. UNIX charset format.
1059 *******************************************************************/
1060
1061 #define INCLUDE_LIST "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_/ \t.,"
1062 #define INSIDE_DQUOTE_LIST "$`\n\"\\"
1063
1064 char *escape_shell_string(const char *src)
1065 {
1066         size_t srclen = strlen(src);
1067         char *ret = SMB_MALLOC_ARRAY(char, (srclen * 2) + 1);
1068         char *dest = ret;
1069         bool in_s_quote = false;
1070         bool in_d_quote = false;
1071         bool next_escaped = false;
1072
1073         if (!ret) {
1074                 return NULL;
1075         }
1076
1077         while (*src) {
1078                 size_t c_size;
1079                 codepoint_t c = next_codepoint(src, &c_size);
1080
1081                 if (c == INVALID_CODEPOINT) {
1082                         SAFE_FREE(ret);
1083                         return NULL;
1084                 }
1085
1086                 if (c_size > 1) {
1087                         memcpy(dest, src, c_size);
1088                         src += c_size;
1089                         dest += c_size;
1090                         next_escaped = false;
1091                         continue;
1092                 }
1093
1094                 /*
1095                  * Deal with backslash escaped state.
1096                  * This only lasts for one character.
1097                  */
1098
1099                 if (next_escaped) {
1100                         *dest++ = *src++;
1101                         next_escaped = false;
1102                         continue;
1103                 }
1104
1105                 /*
1106                  * Deal with single quote state. The
1107                  * only thing we care about is exiting
1108                  * this state.
1109                  */
1110
1111                 if (in_s_quote) {
1112                         if (*src == '\'') {
1113                                 in_s_quote = false;
1114                         }
1115                         *dest++ = *src++;
1116                         continue;
1117                 }
1118
1119                 /*
1120                  * Deal with double quote state. The most
1121                  * complex state. We must cope with \, meaning
1122                  * possibly escape next char (depending what it
1123                  * is), ", meaning exit this state, and possibly
1124                  * add an \ escape to any unprotected character
1125                  * (listed in INSIDE_DQUOTE_LIST).
1126                  */
1127
1128                 if (in_d_quote) {
1129                         if (*src == '\\') {
1130                                 /*
1131                                  * Next character might be escaped.
1132                                  * We have to peek. Inside double
1133                                  * quotes only INSIDE_DQUOTE_LIST
1134                                  * characters are escaped by a \.
1135                                  */
1136
1137                                 char nextchar;
1138
1139                                 c = next_codepoint(&src[1], &c_size);
1140                                 if (c == INVALID_CODEPOINT) {
1141                                         SAFE_FREE(ret);
1142                                         return NULL;
1143                                 }
1144                                 if (c_size > 1) {
1145                                         /*
1146                                          * Don't escape the next char.
1147                                          * Just copy the \.
1148                                          */
1149                                         *dest++ = *src++;
1150                                         continue;
1151                                 }
1152
1153                                 nextchar = src[1];
1154
1155                                 if (nextchar && strchr(INSIDE_DQUOTE_LIST,
1156                                                         (int)nextchar)) {
1157                                         next_escaped = true;
1158                                 }
1159                                 *dest++ = *src++;
1160                                 continue;
1161                         }
1162
1163                         if (*src == '\"') {
1164                                 /* Exit double quote state. */
1165                                 in_d_quote = false;
1166                                 *dest++ = *src++;
1167                                 continue;
1168                         }
1169
1170                         /*
1171                          * We know the character isn't \ or ",
1172                          * so escape it if it's any of the other
1173                          * possible unprotected characters.
1174                          */
1175
1176                         if (strchr(INSIDE_DQUOTE_LIST, (int)*src)) {
1177                                 *dest++ = '\\';
1178                         }
1179                         *dest++ = *src++;
1180                         continue;
1181                 }
1182
1183                 /*
1184                  * From here to the end of the loop we're
1185                  * not in the single or double quote state.
1186                  */
1187
1188                 if (*src == '\\') {
1189                         /* Next character must be escaped. */
1190                         next_escaped = true;
1191                         *dest++ = *src++;
1192                         continue;
1193                 }
1194
1195                 if (*src == '\'') {
1196                         /* Go into single quote state. */
1197                         in_s_quote = true;
1198                         *dest++ = *src++;
1199                         continue;
1200                 }
1201
1202                 if (*src == '\"') {
1203                         /* Go into double quote state. */
1204                         in_d_quote = true;
1205                         *dest++ = *src++;
1206                         continue;
1207                 }
1208
1209                 /* Check if we need to escape the character. */
1210
1211                 if (!strchr(INCLUDE_LIST, (int)*src)) {
1212                         *dest++ = '\\';
1213                 }
1214                 *dest++ = *src++;
1215         }
1216         *dest++ = '\0';
1217         return ret;
1218 }
1219
1220 /***************************************************
1221  str_list_make, v3 version. The v4 version does not
1222  look at quoted strings with embedded blanks, so
1223  do NOT merge this function please!
1224 ***************************************************/
1225
1226 #define S_LIST_ABS 16 /* List Allocation Block Size */
1227
1228 char **str_list_make_v3(TALLOC_CTX *mem_ctx, const char *string,
1229         const char *sep)
1230 {
1231         char **list;
1232         const char *str;
1233         char *s, *tok;
1234         int num, lsize;
1235
1236         if (!string || !*string)
1237                 return NULL;
1238
1239         list = talloc_array(mem_ctx, char *, S_LIST_ABS+1);
1240         if (list == NULL) {
1241                 return NULL;
1242         }
1243         lsize = S_LIST_ABS;
1244
1245         s = talloc_strdup(list, string);
1246         if (s == NULL) {
1247                 DEBUG(0,("str_list_make: Unable to allocate memory"));
1248                 TALLOC_FREE(list);
1249                 return NULL;
1250         }
1251         if (!sep) sep = LIST_SEP;
1252
1253         num = 0;
1254         str = s;
1255
1256         while (next_token_talloc(list, &str, &tok, sep)) {
1257
1258                 if (num == lsize) {
1259                         char **tmp;
1260
1261                         lsize += S_LIST_ABS;
1262
1263                         tmp = talloc_realloc(mem_ctx, list, char *,
1264                                                    lsize + 1);
1265                         if (tmp == NULL) {
1266                                 DEBUG(0,("str_list_make: "
1267                                         "Unable to allocate memory"));
1268                                 TALLOC_FREE(list);
1269                                 return NULL;
1270                         }
1271
1272                         list = tmp;
1273
1274                         memset (&list[num], 0,
1275                                 ((sizeof(char**)) * (S_LIST_ABS +1)));
1276                 }
1277
1278                 list[num] = tok;
1279                 num += 1;
1280         }
1281
1282         list[num] = NULL;
1283
1284         TALLOC_FREE(s);
1285         return list;
1286 }