git.sur5r.net Git - openldap/blob - servers/slapd/limits.c

   1 /* limits.c - routines to handle regex-based size and time limits */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2006 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20
  21 #include <ac/regex.h>
  22 #include <ac/string.h>
  23
  24 #include "slap.h"
  25 #include "lutil.h"
  26
  27 /* define to get an error if requesting limit higher than hard */
  28 #undef ABOVE_HARD_LIMIT_IS_ERROR
  29
  30 static char *
  31 limits2str( unsigned i )
  32 {
  33         switch ( i ) {
  34         case SLAP_LIMITS_UNDEFINED:
  35                 return "UNDEFINED";
  36
  37         case SLAP_LIMITS_EXACT:
  38                 return "EXACT";
  39
  40         case SLAP_LIMITS_ONE:
  41                 return "ONELEVEL";
  42
  43         case SLAP_LIMITS_SUBTREE:
  44                 return "SUBTREE";
  45
  46         case SLAP_LIMITS_CHILDREN:
  47                 return "CHILDREN";
  48
  49         case SLAP_LIMITS_REGEX:
  50                 return "REGEX";
  51
  52         case SLAP_LIMITS_ANONYMOUS:
  53                 return "ANONYMOUS";
  54
  55         case SLAP_LIMITS_USERS:
  56                 return "USERS";
  57
  58         case SLAP_LIMITS_ANY:
  59                 return "ANY";
  60
  61         default:
  62                 return "UNKNOWN";
  63         }
  64 }
  65
  66 int
  67 limits_get(
  68         Operation               *op,
  69         struct berval           *ndn,
  70         struct slap_limits_set  **limit
  71 )
  72 {
  73         struct slap_limits **lm;
  74
  75         assert( op != NULL );
  76         assert( limit != NULL );
  77
  78         Debug( LDAP_DEBUG_TRACE, "==> limits_get: %s dn=\"%s\"\n",
  79                         op->o_log_prefix,
  80                         BER_BVISNULL( ndn ) ? "[anonymous]" : ndn->bv_val, 0 );
  81         /*
  82          * default values
  83          */
  84         *limit = &op->o_bd->be_def_limit;
  85
  86         if ( op->o_bd->be_limits == NULL ) {
  87                 return( 0 );
  88         }
  89
  90         for ( lm = op->o_bd->be_limits; lm[0] != NULL; lm++ ) {
  91                 unsigned        style = lm[0]->lm_flags & SLAP_LIMITS_MASK;
  92                 unsigned        type = lm[0]->lm_flags & SLAP_LIMITS_TYPE_MASK;
  93
  94                 switch ( style ) {
  95                 case SLAP_LIMITS_EXACT:
  96                         if ( BER_BVISEMPTY( ndn ) ) {
  97                                 break;
  98                         }
  99
 100                         if ( type == SLAP_LIMITS_TYPE_GROUP ) {
 101                                 int     rc;
 102
 103                                 rc = backend_group( op, NULL,
 104                                                 &lm[0]->lm_pat, ndn,
 105                                                 lm[0]->lm_group_oc,
 106                                                 lm[0]->lm_group_ad );
 107                                 if ( rc == 0 ) {
 108                                         *limit = &lm[0]->lm_limits;
 109                                         Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=GROUP match=EXACT "
 110                                                         "dn=\"%s\" oc=\"%s\" ad=\"%s\"\n",
 111                                                         lm[0]->lm_pat.bv_val,
 112                                                         lm[0]->lm_group_oc->soc_cname.bv_val,
 113                                                         lm[0]->lm_group_ad->ad_cname.bv_val );
 114
 115                                         return( 0 );
 116                                 }
 117                         } else {
 118
 119                                 if ( dn_match( &lm[0]->lm_pat, ndn ) ) {
 120                                         *limit = &lm[0]->lm_limits;
 121                                         Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=DN match=EXACT dn=\"%s\"\n",
 122                                                         lm[0]->lm_pat.bv_val, 0, 0 );
 123                                         return( 0 );
 124                                 }
 125                         }
 126                         break;
 127
 128                 case SLAP_LIMITS_ONE:
 129                 case SLAP_LIMITS_SUBTREE:
 130                 case SLAP_LIMITS_CHILDREN: {
 131                         size_t d;
 132
 133                         if ( BER_BVISEMPTY( ndn ) ) {
 134                                 break;
 135                         }
 136
 137                         /* ndn shorter than dn_pat */
 138                         if ( ndn->bv_len < lm[0]->lm_pat.bv_len ) {
 139                                 break;
 140                         }
 141                         d = ndn->bv_len - lm[0]->lm_pat.bv_len;
 142
 143                         /* allow exact match for SUBTREE only */
 144                         if ( d == 0 ) {
 145                                 if ( style != SLAP_LIMITS_SUBTREE ) {
 146                                         break;
 147                                 }
 148                         } else {
 149                                 /* check for unescaped rdn separator */
 150                                 if ( !DN_SEPARATOR( ndn->bv_val[d - 1] ) ) {
 151                                         break;
 152                                 }
 153                         }
 154
 155                         /* in case of (sub)match ... */
 156                         if ( lm[0]->lm_pat.bv_len == ( ndn->bv_len - d )
 157                                         && strcmp( lm[0]->lm_pat.bv_val,
 158                                                 &ndn->bv_val[d] ) == 0 )
 159                         {
 160                                 /* check for exactly one rdn in case of ONE */
 161                                 if ( style == SLAP_LIMITS_ONE ) {
 162                                         /*
 163                                          * if ndn is more that one rdn
 164                                          * below dn_pat, continue
 165                                          */
 166                                         if ( (size_t) dn_rdnlen( NULL, ndn )
 167                                                         != d - 1 )
 168                                         {
 169                                                 break;
 170                                         }
 171                                 }
 172
 173                                 *limit = &lm[0]->lm_limits;
 174                                 Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=DN match=%s dn=\"%s\"\n",
 175                                                 limits2str( style ), lm[0]->lm_pat.bv_val, 0 );
 176                                 return( 0 );
 177                         }
 178
 179                         break;
 180                 }
 181
 182                 case SLAP_LIMITS_REGEX:
 183                         if ( BER_BVISEMPTY( ndn ) ) {
 184                                 break;
 185                         }
 186                         if ( regexec( &lm[0]->lm_regex, ndn->bv_val,
 187                                                 0, NULL, 0 ) == 0 )
 188                         {
 189                                 *limit = &lm[0]->lm_limits;
 190                                 Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=DN match=%s dn=\"%s\"\n",
 191                                                 limits2str( style ), lm[0]->lm_pat.bv_val, 0 );
 192                                 return( 0 );
 193                         }
 194                         break;
 195
 196                 case SLAP_LIMITS_ANONYMOUS:
 197                         if ( BER_BVISEMPTY( ndn ) ) {
 198                                 Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=DN match=%s\n",
 199                                                 limits2str( style ), 0, 0 );
 200                                 *limit = &lm[0]->lm_limits;
 201                                 return( 0 );
 202                         }
 203                         break;
 204
 205                 case SLAP_LIMITS_USERS:
 206                         if ( !BER_BVISEMPTY( ndn ) ) {
 207                                 *limit = &lm[0]->lm_limits;
 208                                 Debug( LDAP_DEBUG_TRACE, "<== limits_get: type=DN match=%s\n",
 209                                                 limits2str( style ), 0, 0 );
 210                                 return( 0 );
 211                         }
 212                         break;
 213
 214                 case SLAP_LIMITS_ANY:
 215                         *limit = &lm[0]->lm_limits;
 216                         return( 0 );
 217
 218                 default:
 219                         assert( 0 );    /* unreachable */
 220                         return( -1 );
 221                 }
 222         }
 223
 224         return( 0 );
 225 }
 226
 227 static int
 228 limits_add(
 229         Backend                 *be,
 230         unsigned                flags,
 231         const char              *pattern,
 232         ObjectClass             *group_oc,
 233         AttributeDescription    *group_ad,
 234         struct slap_limits_set  *limit
 235 )
 236 {
 237         int                     i;
 238         struct slap_limits      *lm;
 239         unsigned                type, style;
 240
 241         assert( be != NULL );
 242         assert( limit != NULL );
 243
 244         type = flags & SLAP_LIMITS_TYPE_MASK;
 245         style = flags & SLAP_LIMITS_MASK;
 246
 247         switch ( style ) {
 248         case SLAP_LIMITS_ANONYMOUS:
 249         case SLAP_LIMITS_USERS:
 250         case SLAP_LIMITS_ANY:
 251                 for ( i = 0; be->be_limits && be->be_limits[ i ]; i++ ) {
 252                         if ( be->be_limits[ i ]->lm_flags == style ) {
 253                                 return( -1 );
 254                         }
 255                 }
 256                 break;
 257         }
 258
 259
 260         lm = ( struct slap_limits * )ch_calloc( sizeof( struct slap_limits ), 1 );
 261
 262         switch ( style ) {
 263         case SLAP_LIMITS_UNDEFINED:
 264                 style = SLAP_LIMITS_EXACT;
 265                 /* continue to next cases */
 266         case SLAP_LIMITS_EXACT:
 267         case SLAP_LIMITS_ONE:
 268         case SLAP_LIMITS_SUBTREE:
 269         case SLAP_LIMITS_CHILDREN:
 270                 lm->lm_flags = style | type;
 271                 {
 272                         int rc;
 273                         struct berval bv;
 274
 275                         ber_str2bv( pattern, 0, 0, &bv );
 276
 277                         rc = dnNormalize( 0, NULL, NULL, &bv, &lm->lm_pat, NULL );
 278                         if ( rc != LDAP_SUCCESS ) {
 279                                 ch_free( lm );
 280                                 return( -1 );
 281                         }
 282                 }
 283                 break;
 284
 285         case SLAP_LIMITS_REGEX:
 286                 lm->lm_flags = style | type;
 287                 ber_str2bv( pattern, 0, 1, &lm->lm_pat );
 288                 if ( regcomp( &lm->lm_regex, lm->lm_pat.bv_val,
 289                                         REG_EXTENDED | REG_ICASE ) ) {
 290                         free( lm->lm_pat.bv_val );
 291                         ch_free( lm );
 292                         return( -1 );
 293                 }
 294                 break;
 295
 296         case SLAP_LIMITS_ANONYMOUS:
 297         case SLAP_LIMITS_USERS:
 298         case SLAP_LIMITS_ANY:
 299                 lm->lm_flags = style | type;
 300                 BER_BVZERO( &lm->lm_pat );
 301                 break;
 302         }
 303
 304         switch ( type ) {
 305         case SLAP_LIMITS_TYPE_GROUP:
 306                 assert( group_oc != NULL );
 307                 assert( group_ad != NULL );
 308                 lm->lm_group_oc = group_oc;
 309                 lm->lm_group_ad = group_ad;
 310                 break;
 311         }
 312
 313         lm->lm_limits = *limit;
 314
 315         i = 0;
 316         if ( be->be_limits != NULL ) {
 317                 for ( ; be->be_limits[i]; i++ );
 318         }
 319
 320         be->be_limits = ( struct slap_limits ** )ch_realloc( be->be_limits,
 321                         sizeof( struct slap_limits * ) * ( i + 2 ) );
 322         be->be_limits[i] = lm;
 323         be->be_limits[i+1] = NULL;
 324
 325         return( 0 );
 326 }
 327
 328 int
 329 limits_parse(
 330         Backend     *be,
 331         const char  *fname,
 332         int         lineno,
 333         int         argc,
 334         char        **argv
 335 )
 336 {
 337         int                     flags = SLAP_LIMITS_UNDEFINED;
 338         char                    *pattern;
 339         struct slap_limits_set  limit;
 340         int                     i, rc = 0;
 341         ObjectClass             *group_oc = NULL;
 342         AttributeDescription    *group_ad = NULL;
 343
 344         assert( be != NULL );
 345
 346         if ( argc < 3 ) {
 347                 Debug( LDAP_DEBUG_ANY,
 348                         "%s : line %d: missing arg(s) in "
 349                         "\"limits <pattern> <limits>\" line.\n%s",
 350                         fname, lineno, "" );
 351                 return( -1 );
 352         }
 353
 354         limit = be->be_def_limit;
 355
 356         /*
 357          * syntax:
 358          *
 359          * "limits" <pattern> <limit> [ ... ]
 360          *
 361          *
 362          * <pattern>:
 363          *
 364          * "anonymous"
 365          * "users"
 366          * [ "dn" [ "." { "exact" | "base" | "onelevel" | "subtree" | children"
 367          *      | "regex" | "anonymous" } ] "=" ] <dn pattern>
 368          *
 369          * Note:
 370          *      "exact" and "base" are the same (exact match);
 371          *      "onelevel" means exactly one rdn below, NOT including pattern
 372          *      "subtree" means any rdn below, including pattern
 373          *      "children" means any rdn below, NOT including pattern
 374          *
 375          *      "anonymous" may be deprecated in favour
 376          *      of the pattern = "anonymous" form
 377          *
 378          * "group[/objectClass[/attributeType]]" "=" "<dn pattern>"
 379          *
 380          * <limit>:
 381          *
 382          * "time" [ "." { "soft" | "hard" } ] "=" <integer>
 383          *
 384          * "size" [ "." { "soft" | "hard" | "unchecked" } ] "=" <integer>
 385          */
 386
 387         pattern = argv[1];
 388         if ( strcmp( pattern, "*" ) == 0) {
 389                 flags = SLAP_LIMITS_ANY;
 390
 391         } else if ( strcasecmp( pattern, "anonymous" ) == 0 ) {
 392                 flags = SLAP_LIMITS_ANONYMOUS;
 393
 394         } else if ( strcasecmp( pattern, "users" ) == 0 ) {
 395                 flags = SLAP_LIMITS_USERS;
 396
 397         } else if ( strncasecmp( pattern, "dn", STRLENOF( "dn" ) ) == 0 ) {
 398                 pattern += STRLENOF( "dn" );
 399                 if ( pattern[0] == '.' ) {
 400                         pattern++;
 401                         if ( strncasecmp( pattern, "exact", STRLENOF( "exact" )) == 0 ) {
 402                                 flags = SLAP_LIMITS_EXACT;
 403                                 pattern += STRLENOF( "exact" );
 404
 405                         } else if ( strncasecmp( pattern, "base", STRLENOF( "base" ) ) == 0 ) {
 406                                 flags = SLAP_LIMITS_BASE;
 407                                 pattern += STRLENOF( "base" );
 408
 409                         } else if ( strncasecmp( pattern, "one", STRLENOF( "one" ) ) == 0 ) {
 410                                 flags = SLAP_LIMITS_ONE;
 411                                 pattern += STRLENOF( "one" );
 412                                 if ( strncasecmp( pattern, "level", STRLENOF( "level" ) ) == 0 ) {
 413                                         pattern += STRLENOF( "level" );
 414
 415                                 } else {
 416                                         Debug( LDAP_DEBUG_ANY,
 417                                                 "%s : line %d: deprecated \"one\" style "
 418                                                 "\"limits <pattern> <limits>\" line; "
 419                                                 "use \"onelevel\" instead.\n", fname, lineno, 0 );
 420                                 }
 421
 422                         } else if ( strncasecmp( pattern, "sub", STRLENOF( "sub" ) ) == 0 ) {
 423                                 flags = SLAP_LIMITS_SUBTREE;
 424                                 pattern += STRLENOF( "sub" );
 425                                 if ( strncasecmp( pattern, "tree", STRLENOF( "tree" ) ) == 0 ) {
 426                                         pattern += STRLENOF( "tree" );
 427
 428                                 } else {
 429                                         Debug( LDAP_DEBUG_ANY,
 430                                                 "%s : line %d: deprecated \"sub\" style "
 431                                                 "\"limits <pattern> <limits>\" line; "
 432                                                 "use \"subtree\" instead.\n", fname, lineno, 0 );
 433                                 }
 434
 435                         } else if ( strncasecmp( pattern, "children", STRLENOF( "children" ) ) == 0 ) {
 436                                 flags = SLAP_LIMITS_CHILDREN;
 437                                 pattern += STRLENOF( "children" );
 438
 439                         } else if ( strncasecmp( pattern, "regex", STRLENOF( "regex" ) ) == 0 ) {
 440                                 flags = SLAP_LIMITS_REGEX;
 441                                 pattern += STRLENOF( "regex" );
 442
 443                         /*
 444                          * this could be deprecated in favour
 445                          * of the pattern = "anonymous" form
 446                          */
 447                         } else if ( strncasecmp( pattern, "anonymous", STRLENOF( "anonymous" ) ) == 0 ) {
 448                                 flags = SLAP_LIMITS_ANONYMOUS;
 449                                 pattern = NULL;
 450                         }
 451                 }
 452
 453                 /* pre-check the data */
 454                 switch ( flags ) {
 455                 case SLAP_LIMITS_ANONYMOUS:
 456                 case SLAP_LIMITS_USERS:
 457
 458                         /* no need for pattern */
 459                         pattern = NULL;
 460                         break;
 461
 462                 default:
 463                         if ( pattern[0] != '=' ) {
 464                                 Debug( LDAP_DEBUG_ANY,
 465                                         "%s : line %d: missing '=' in "
 466                                         "\"dn[.{exact|base|onelevel|subtree"
 467                                         "|children|regex|anonymous}]"
 468                                         "=<pattern>\" in "
 469                                         "\"limits <pattern> <limits>\" "
 470                                         "line.\n%s",
 471                                         fname, lineno, "" );
 472                                 return( -1 );
 473                         }
 474
 475                         /* skip '=' (required) */
 476                         pattern++;
 477
 478                         /* trim obvious cases */
 479                         if ( strcmp( pattern, "*" ) == 0 ) {
 480                                 flags = SLAP_LIMITS_ANY;
 481                                 pattern = NULL;
 482
 483                         } else if ( flags == SLAP_LIMITS_REGEX
 484                                         && strcmp( pattern, ".*" ) == 0 ) {
 485                                 flags = SLAP_LIMITS_ANY;
 486                                 pattern = NULL;
 487                         }
 488                 }
 489
 490         } else if (strncasecmp( pattern, "group", STRLENOF( "group" ) ) == 0 ) {
 491                 pattern += STRLENOF( "group" );
 492
 493                 if ( pattern[0] == '/' ) {
 494                         struct berval   oc, ad;
 495
 496                         oc.bv_val = pattern + 1;
 497                         pattern = strchr( pattern, '=' );
 498                         if ( pattern == NULL ) {
 499                                 return -1;
 500                         }
 501
 502                         ad.bv_val = strchr( oc.bv_val, '/' );
 503                         if ( ad.bv_val != NULL ) {
 504                                 const char      *text = NULL;
 505                                 int             rc;
 506
 507                                 oc.bv_len = ad.bv_val - oc.bv_val;
 508
 509                                 ad.bv_val++;
 510                                 ad.bv_len = pattern - ad.bv_val;
 511                                 rc = slap_bv2ad( &ad, &group_ad, &text );
 512                                 if ( rc != LDAP_SUCCESS ) {
 513                                         goto no_ad;
 514                                 }
 515
 516                         } else {
 517                                 oc.bv_len = pattern - oc.bv_val;
 518                         }
 519
 520                         group_oc = oc_bvfind( &oc );
 521                         if ( group_oc == NULL ) {
 522                                 goto no_oc;
 523                         }
 524                 }
 525
 526                 if ( group_oc == NULL ) {
 527                         group_oc = oc_find( SLAPD_GROUP_CLASS );
 528                         if ( group_oc == NULL ) {
 529 no_oc:;
 530                                 return( -1 );
 531                         }
 532                 }
 533
 534                 if ( group_ad == NULL ) {
 535                         const char      *text = NULL;
 536                         int             rc;
 537
 538                         rc = slap_str2ad( SLAPD_GROUP_ATTR, &group_ad, &text );
 539
 540                         if ( rc != LDAP_SUCCESS ) {
 541 no_ad:;
 542                                 return( -1 );
 543                         }
 544                 }
 545
 546                 flags = SLAP_LIMITS_TYPE_GROUP | SLAP_LIMITS_EXACT;
 547
 548                 if ( pattern[0] != '=' ) {
 549                         Debug( LDAP_DEBUG_ANY,
 550                                 "%s : line %d: missing '=' in "
 551                                 "\"group[/objectClass[/attributeType]]"
 552                                 "=<pattern>\" in "
 553                                 "\"limits <pattern> <limits>\" line.\n",
 554                                 fname, lineno, 0 );
 555                         return( -1 );
 556                 }
 557
 558                 /* skip '=' (required) */
 559                 pattern++;
 560         }
 561
 562         /* get the limits */
 563         for ( i = 2; i < argc; i++ ) {
 564                 if ( limits_parse_one( argv[i], &limit ) ) {
 565
 566                         Debug( LDAP_DEBUG_ANY,
 567                                 "%s : line %d: unknown limit values \"%s\" in "
 568                                 "\"limits <pattern> <limits>\" line.\n",
 569                         fname, lineno, argv[i] );
 570
 571                         return( 1 );
 572                 }
 573         }
 574
 575         /*
 576          * sanity checks ...
 577          *
 578          * FIXME: add warnings?
 579          */
 580         if ( limit.lms_t_hard > 0 &&
 581                         ( limit.lms_t_hard < limit.lms_t_soft
 582                           || limit.lms_t_soft == -1 ) ) {
 583                 limit.lms_t_hard = limit.lms_t_soft;
 584         }
 585
 586         if ( limit.lms_s_hard > 0 &&
 587                         ( limit.lms_s_hard < limit.lms_s_soft
 588                           || limit.lms_s_soft == -1 ) ) {
 589                 limit.lms_s_hard = limit.lms_s_soft;
 590         }
 591
 592         /*
 593          * defaults ...
 594          *
 595          * lms_t_hard:
 596          *      -1      => no limits
 597          *      0       => same as soft
 598          *      > 0     => limit (in seconds)
 599          *
 600          * lms_s_hard:
 601          *      -1      => no limits
 602          *      0       0> same as soft
 603          *      > 0     => limit (in entries)
 604          *
 605          * lms_s_pr_total:
 606          *      -2      => disable the control
 607          *      -1      => no limits
 608          *      0       => same as soft
 609          *      > 0     => limit (in entries)
 610          *
 611          * lms_s_pr:
 612          *      -1      => no limits
 613          *      0       => no limits?
 614          *      > 0     => limit size (in entries)
 615          */
 616         if ( limit.lms_s_pr_total > 0 &&
 617                         limit.lms_s_pr > limit.lms_s_pr_total ) {
 618                 limit.lms_s_pr = limit.lms_s_pr_total;
 619         }
 620
 621         rc = limits_add( be, flags, pattern, group_oc, group_ad, &limit );
 622         if ( rc ) {
 623
 624                 Debug( LDAP_DEBUG_ANY,
 625                         "%s : line %d: unable to add limit in "
 626                         "\"limits <pattern> <limits>\" line.\n",
 627                 fname, lineno, 0 );
 628         }
 629
 630         return( rc );
 631 }
 632
 633 int
 634 limits_parse_one(
 635         const char              *arg,
 636         struct slap_limits_set  *limit
 637 )
 638 {
 639         assert( arg != NULL );
 640         assert( limit != NULL );
 641
 642         if ( strncasecmp( arg, "time", STRLENOF( "time" ) ) == 0 ) {
 643                 arg += STRLENOF( "time" );
 644
 645                 if ( arg[0] == '.' ) {
 646                         arg++;
 647                         if ( strncasecmp( arg, "soft=", STRLENOF( "soft=" ) ) == 0 ) {
 648                                 arg += STRLENOF( "soft=" );
 649                                 if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 650                                         limit->lms_t_soft = -1;
 651
 652                                 } else {
 653                                         int     soft;
 654
 655                                         if ( lutil_atoi( &soft, arg ) != 0 || soft < -1 ) {
 656                                                 return( 1 );
 657                                         }
 658
 659                                         if ( soft == -1 ) {
 660                                                 /* FIXME: use "unlimited" instead; issue warning? */
 661                                         }
 662
 663                                         limit->lms_t_soft = soft;
 664                                 }
 665
 666                         } else if ( strncasecmp( arg, "hard=", STRLENOF( "hard=" ) ) == 0 ) {
 667                                 arg += STRLENOF( "hard=" );
 668                                 if ( strcasecmp( arg, "soft" ) == 0 ) {
 669                                         limit->lms_t_hard = 0;
 670
 671                                 } else if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 672                                         limit->lms_t_hard = -1;
 673
 674                                 } else {
 675                                         int     hard;
 676
 677                                         if ( lutil_atoi( &hard, arg ) != 0 || hard < -1 ) {
 678                                                 return( 1 );
 679                                         }
 680
 681                                         if ( hard == -1 ) {
 682                                                 /* FIXME: use "unlimited" instead */
 683                                         }
 684
 685                                         if ( hard == 0 ) {
 686                                                 /* FIXME: use "soft" instead */
 687                                         }
 688
 689                                         limit->lms_t_hard = hard;
 690                                 }
 691
 692                         } else {
 693                                 return( 1 );
 694                         }
 695
 696                 } else if ( arg[0] == '=' ) {
 697                         arg++;
 698                         if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 699                                 limit->lms_t_soft = -1;
 700
 701                         } else {
 702                                 if ( lutil_atoi( &limit->lms_t_soft, arg ) != 0
 703                                         || limit->lms_t_soft < -1 )
 704                                 {
 705                                         return( 1 );
 706                                 }
 707                         }
 708                         limit->lms_t_hard = 0;
 709
 710                 } else {
 711                         return( 1 );
 712                 }
 713
 714         } else if ( strncasecmp( arg, "size", STRLENOF( "size" ) ) == 0 ) {
 715                 arg += STRLENOF( "size" );
 716
 717                 if ( arg[0] == '.' ) {
 718                         arg++;
 719                         if ( strncasecmp( arg, "soft=", STRLENOF( "soft=" ) ) == 0 ) {
 720                                 arg += STRLENOF( "soft=" );
 721                                 if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 722                                         limit->lms_s_soft = -1;
 723
 724                                 } else {
 725                                         int     soft;
 726
 727                                         if ( lutil_atoi( &soft, arg ) != 0 || soft < -1 ) {
 728                                                 return( 1 );
 729                                         }
 730
 731                                         if ( soft == -1 ) {
 732                                                 /* FIXME: use "unlimited" instead */
 733                                         }
 734
 735                                         limit->lms_s_soft = soft;
 736                                 }
 737
 738                         } else if ( strncasecmp( arg, "hard=", STRLENOF( "hard=" ) ) == 0 ) {
 739                                 arg += STRLENOF( "hard=" );
 740                                 if ( strcasecmp( arg, "soft" ) == 0 ) {
 741                                         limit->lms_s_hard = 0;
 742
 743                                 } else if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 744                                         limit->lms_s_hard = -1;
 745
 746                                 } else {
 747                                         int     hard;
 748
 749                                         if ( lutil_atoi( &hard, arg ) != 0 || hard < -1 ) {
 750                                                 return( 1 );
 751                                         }
 752
 753                                         if ( hard == -1 ) {
 754                                                 /* FIXME: use "unlimited" instead */
 755                                         }
 756
 757                                         if ( hard == 0 ) {
 758                                                 /* FIXME: use "soft" instead */
 759                                         }
 760
 761                                         limit->lms_s_hard = hard;
 762                                 }
 763
 764                         } else if ( strncasecmp( arg, "unchecked=", STRLENOF( "unchecked=" ) ) == 0 ) {
 765                                 arg += STRLENOF( "unchecked=" );
 766                                 if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 767                                         limit->lms_s_unchecked = -1;
 768
 769                                 } else if ( strcasecmp( arg, "disabled" ) == 0 ) {
 770                                         limit->lms_s_unchecked = 0;
 771
 772                                 } else {
 773                                         int     unchecked;
 774
 775                                         if ( lutil_atoi( &unchecked, arg ) != 0 || unchecked < -1 ) {
 776                                                 return( 1 );
 777                                         }
 778
 779                                         if ( unchecked == -1 ) {
 780                                                 /*  FIXME: use "unlimited" instead */
 781                                         }
 782
 783                                         limit->lms_s_unchecked = unchecked;
 784                                 }
 785
 786                         } else if ( strncasecmp( arg, "pr=", STRLENOF( "pr=" ) ) == 0 ) {
 787                                 arg += STRLENOF( "pr=" );
 788                                 if ( strcasecmp( arg, "noEstimate" ) == 0 ) {
 789                                         limit->lms_s_pr_hide = 1;
 790
 791                                 } else if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 792                                         limit->lms_s_pr = -1;
 793
 794                                 } else {
 795                                         int     pr;
 796
 797                                         if ( lutil_atoi( &pr, arg ) != 0 || pr < -1 ) {
 798                                                 return( 1 );
 799                                         }
 800
 801                                         if ( pr == -1 ) {
 802                                                 /* FIXME: use "unlimited" instead */
 803                                         }
 804
 805                                         limit->lms_s_pr = pr;
 806                                 }
 807
 808                         } else if ( strncasecmp( arg, "prtotal=", STRLENOF( "prtotal=" ) ) == 0 ) {
 809                                 arg += STRLENOF( "prtotal=" );
 810
 811                                 if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 812                                         limit->lms_s_pr_total = -1;
 813
 814                                 } else if ( strcasecmp( arg, "disabled" ) == 0 ) {
 815                                         limit->lms_s_pr_total = -2;
 816
 817                                 } else if ( strcasecmp( arg, "hard" ) == 0 ) {
 818                                         limit->lms_s_pr_total = 0;
 819
 820                                 } else {
 821                                         int     total;
 822
 823                                         if ( lutil_atoi( &total, arg ) != 0 || total < -1 ) {
 824                                                 return( 1 );
 825                                         }
 826
 827                                         if ( total == -1 ) {
 828                                                 /* FIXME: use "unlimited" instead */
 829                                         }
 830
 831                                         if ( total == 0 ) {
 832                                                 /* FIXME: use "pr=disable" instead */
 833                                         }
 834
 835                                         limit->lms_s_pr_total = total;
 836                                 }
 837
 838                         } else {
 839                                 return( 1 );
 840                         }
 841
 842                 } else if ( arg[0] == '=' ) {
 843                         arg++;
 844                         if ( strcasecmp( arg, "unlimited" ) == 0 || strcasecmp( arg, "none" ) == 0 ) {
 845                                 limit->lms_s_soft = -1;
 846
 847                         } else {
 848                                 if ( lutil_atoi( &limit->lms_s_soft, arg ) != 0
 849                                         || limit->lms_s_soft < -1 )
 850                                 {
 851                                         return( 1 );
 852                                 }
 853                         }
 854                         limit->lms_s_hard = 0;
 855
 856                 } else {
 857                         return( 1 );
 858                 }
 859         }
 860
 861         return 0;
 862 }
 863
 864 static const char *lmpats[] = {
 865         "base",
 866         "base",
 867         "onelevel",
 868         "subtree",
 869         "children",
 870         "regex",
 871         "anonymous",
 872         "users",
 873         "*"
 874 };
 875
 876 #define WHATSLEFT       ( buflen - ( ptr - bv->bv_val ) )
 877
 878 /* Caller must provide an adequately sized buffer in bv */
 879 int
 880 limits_unparse( struct slap_limits *lim, struct berval *bv, ber_len_t buflen )
 881 {
 882         struct berval btmp;
 883         char *ptr;
 884         int lm;
 885
 886         if ( !bv || !bv->bv_val ) return -1;
 887
 888         ptr = bv->bv_val;
 889
 890         if (( lim->lm_flags & SLAP_LIMITS_TYPE_MASK ) == SLAP_LIMITS_TYPE_GROUP ) {
 891                 if ( WHATSLEFT <= STRLENOF( "group/" "/" "=\"" "\"" )
 892                                 + lim->lm_group_oc->soc_cname.bv_len
 893                                 + lim->lm_group_ad->ad_cname.bv_len
 894                                 + lim->lm_pat.bv_len ) return -1;
 895
 896                 ptr = lutil_strcopy( ptr, "group/" );
 897                 ptr = lutil_strcopy( ptr, lim->lm_group_oc->soc_cname.bv_val );
 898                 *ptr++ = '/';
 899                 ptr = lutil_strcopy( ptr, lim->lm_group_ad->ad_cname.bv_val );
 900                 ptr = lutil_strcopy( ptr, "=\"" );
 901                 ptr = lutil_strcopy( ptr, lim->lm_pat.bv_val );
 902                 *ptr++ = '"';
 903         } else {
 904                 lm = lim->lm_flags & SLAP_LIMITS_MASK;
 905                 switch( lm ) {
 906                 case SLAP_LIMITS_ANONYMOUS:
 907                 case SLAP_LIMITS_USERS:
 908                 case SLAP_LIMITS_ANY:
 909                         if ( WHATSLEFT <= strlen( lmpats[lm] ) ) return -1;
 910                         ptr = lutil_strcopy( ptr, lmpats[lm] );
 911                         break;
 912                 case SLAP_LIMITS_UNDEFINED:
 913                 case SLAP_LIMITS_EXACT:
 914                 case SLAP_LIMITS_ONE:
 915                 case SLAP_LIMITS_SUBTREE:
 916                 case SLAP_LIMITS_CHILDREN:
 917                 case SLAP_LIMITS_REGEX:
 918                         if ( WHATSLEFT <= STRLENOF( "dn." "=" "\"" "\"" )
 919                                         + strlen( lmpats[lm] ) + lim->lm_pat.bv_len ) return -1;
 920                         ptr = lutil_strcopy( ptr, "dn." );
 921                         ptr = lutil_strcopy( ptr, lmpats[lm] );
 922                         *ptr++ = '=';
 923                         *ptr++ = '"';
 924                         ptr = lutil_strcopy( ptr, lim->lm_pat.bv_val );
 925                         *ptr++ = '"';
 926                         break;
 927                 }
 928         }
 929         bv->bv_len = ptr - bv->bv_val;
 930         btmp.bv_val = ptr;
 931         btmp.bv_len = 0;
 932         if ( limits_unparse_one( &lim->lm_limits,
 933                         SLAP_LIMIT_SIZE|SLAP_LIMIT_TIME,
 934                         &btmp, WHATSLEFT ) )
 935         {
 936                 return -1;
 937         }
 938         bv->bv_len += btmp.bv_len;
 939         return 0;
 940 }
 941
 942 /* Caller must provide an adequately sized buffer in bv */
 943 int
 944 limits_unparse_one( struct slap_limits_set *lim, int which, struct berval *bv, ber_len_t buflen )
 945 {
 946         char *ptr;
 947
 948         if ( !bv || !bv->bv_val ) return -1;
 949
 950         ptr = bv->bv_val;
 951
 952         if ( which & SLAP_LIMIT_SIZE ) {
 953                 if ( lim->lms_s_soft != SLAPD_DEFAULT_SIZELIMIT ) {
 954
 955                         /* If same as global limit, drop it */
 956                         if ( lim != &frontendDB->be_def_limit &&
 957                                 lim->lms_s_soft == frontendDB->be_def_limit.lms_s_soft )
 958                         {
 959                                 goto s_hard;
 960                         /* If there's also a hard limit, fully qualify this one */
 961                         } else if ( lim->lms_s_hard ) {
 962                                 if ( WHATSLEFT <= STRLENOF( " size.soft=" ) ) return -1;
 963                                 ptr = lutil_strcopy( ptr, " size.soft=" );
 964
 965                         /* If doing both size & time, qualify this */
 966                         } else if ( which & SLAP_LIMIT_TIME ) {
 967                                 if ( WHATSLEFT <= STRLENOF( " size=" ) ) return -1;
 968                                 ptr = lutil_strcopy( ptr, " size=" );
 969                         }
 970
 971                         if ( lim->lms_s_soft == -1 ) {
 972                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
 973                                 ptr = lutil_strcopy( ptr, "unlimited" );
 974                         } else {
 975                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_s_soft );
 976                                 if ( WHATSLEFT < 0 ) return -1;
 977                         }
 978                         *ptr++ = ' ';
 979                 }
 980 s_hard:
 981                 if ( lim->lms_s_hard ) {
 982                         if ( WHATSLEFT <= STRLENOF( " size.hard=" ) ) return -1;
 983                         ptr = lutil_strcopy( ptr, " size.hard=" );
 984                         if ( lim->lms_s_hard == -1 ) {
 985                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
 986                                 ptr = lutil_strcopy( ptr, "unlimited" );
 987                         } else {
 988                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_s_hard );
 989                                 if ( WHATSLEFT < 0 ) return -1;
 990                         }
 991                         *ptr++ = ' ';
 992                 }
 993                 if ( lim->lms_s_unchecked != -1 ) {
 994                         if ( WHATSLEFT <= STRLENOF( " size.unchecked=" ) ) return -1;
 995                         ptr = lutil_strcopy( ptr, " size.unchecked=" );
 996                         if ( lim->lms_s_unchecked == 0 ) {
 997                                 if ( WHATSLEFT <= STRLENOF( "disabled" ) ) return -1;
 998                                 ptr = lutil_strcopy( ptr, "disabled" );
 999                         } else {
1000                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_s_unchecked );
1001                                 if ( WHATSLEFT < 0 ) return -1;
1002                         }
1003                         *ptr++ = ' ';
1004                 }
1005                 if ( lim->lms_s_pr_hide ) {
1006                         if ( WHATSLEFT <= STRLENOF( " size.pr=noEstimate " ) ) return -1;
1007                         ptr = lutil_strcopy( ptr, " size.pr=noEstimate " );
1008                 }
1009                 if ( lim->lms_s_pr ) {
1010                         if ( WHATSLEFT <= STRLENOF( " size.pr=" ) ) return -1;
1011                         ptr = lutil_strcopy( ptr, " size.pr=" );
1012                         if ( lim->lms_s_pr == -1 ) {
1013                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
1014                                 ptr = lutil_strcopy( ptr, "unlimited" );
1015                         } else {
1016                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_s_pr );
1017                                 if ( WHATSLEFT < 0 ) return -1;
1018                         }
1019                         *ptr++ = ' ';
1020                 }
1021                 if ( lim->lms_s_pr_total ) {
1022                         if ( WHATSLEFT <= STRLENOF( " size.prtotal=" ) ) return -1;
1023                         ptr = lutil_strcopy( ptr, " size.prtotal=" );
1024                         if ( lim->lms_s_pr_total == -1 ) {
1025                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
1026                                 ptr = lutil_strcopy( ptr, "unlimited" );
1027                         } else if ( lim->lms_s_pr_total == -2 ) {
1028                                 if ( WHATSLEFT <= STRLENOF( "disabled" ) ) return -1;
1029                                 ptr = lutil_strcopy( ptr, "disabled" );
1030                         } else {
1031                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_s_pr_total );
1032                                 if ( WHATSLEFT < 0 ) return -1;
1033                         }
1034                         *ptr++ = ' ';
1035                 }
1036         }
1037
1038         if ( which & SLAP_LIMIT_TIME ) {
1039                 if ( lim->lms_t_soft != SLAPD_DEFAULT_TIMELIMIT ) {
1040
1041                         /* If same as global limit, drop it */
1042                         if ( lim != &frontendDB->be_def_limit &&
1043                                 lim->lms_t_soft == frontendDB->be_def_limit.lms_t_soft )
1044                         {
1045                                 goto t_hard;
1046
1047                         /* If there's also a hard limit, fully qualify this one */
1048                         } else if ( lim->lms_t_hard ) {
1049                                 if ( WHATSLEFT <= STRLENOF( " time.soft=" ) ) return -1;
1050                                 ptr = lutil_strcopy( ptr, " time.soft=" );
1051
1052                         /* If doing both size & time, qualify this */
1053                         } else if ( which & SLAP_LIMIT_SIZE ) {
1054                                 if ( WHATSLEFT <= STRLENOF( " time=" ) ) return -1;
1055                                 ptr = lutil_strcopy( ptr, " time=" );
1056                         }
1057
1058                         if ( lim->lms_t_soft == -1 ) {
1059                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
1060                                 ptr = lutil_strcopy( ptr, "unlimited" );
1061                         } else {
1062                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_t_soft );
1063                                 if ( WHATSLEFT < 0 ) return -1;
1064                         }
1065                         *ptr++ = ' ';
1066                 }
1067 t_hard:
1068                 if ( lim->lms_t_hard ) {
1069                         if ( WHATSLEFT <= STRLENOF( " time.hard=" ) ) return -1;
1070                         ptr = lutil_strcopy( ptr, " time.hard=" );
1071                         if ( lim->lms_t_hard == -1 ) {
1072                                 if ( WHATSLEFT <= STRLENOF( "unlimited" ) ) return -1;
1073                                 ptr = lutil_strcopy( ptr, "unlimited" );
1074                         } else {
1075                                 ptr += snprintf( ptr, WHATSLEFT, "%d", lim->lms_t_hard );
1076                                 if ( WHATSLEFT < 0 ) return -1;
1077                         }
1078                         *ptr++ = ' ';
1079                 }
1080         }
1081         if ( ptr != bv->bv_val ) {
1082                 ptr--;
1083                 *ptr = '\0';
1084                 bv->bv_len = ptr - bv->bv_val;
1085         }
1086
1087         return 0;
1088 }
1089
1090 int
1091 limits_check( Operation *op, SlapReply *rs )
1092 {
1093         assert( op != NULL );
1094         assert( rs != NULL );
1095         /* FIXME: should this be always true? */
1096         assert( op->o_tag == LDAP_REQ_SEARCH);
1097
1098         /* protocol only allows 0..maxInt;
1099          *
1100          * internal searches:
1101          * - may use SLAP_NO_LIMIT ( = -1 ) to indicate no limits;
1102          * - should use slimit = N and tlimit = SLAP_NO_LIMIT to
1103          *   indicate searches that should return exactly N matches,
1104          *   and handle errors thru a callback (see for instance
1105          *   slap_sasl_match() and slap_sasl2dn())
1106          */
1107         if ( op->ors_tlimit == SLAP_NO_LIMIT && op->ors_slimit == SLAP_NO_LIMIT ) {
1108                 return 0;
1109         }
1110
1111         /* allow root to set no limit */
1112         if ( be_isroot( op ) ) {
1113                 op->ors_limit = NULL;
1114
1115                 if ( op->ors_tlimit == 0 ) {
1116                         op->ors_tlimit = SLAP_NO_LIMIT;
1117                 }
1118
1119                 if ( op->ors_slimit == 0 ) {
1120                         op->ors_slimit = SLAP_NO_LIMIT;
1121                 }
1122
1123         /* if not root, get appropriate limits */
1124         } else {
1125                 ( void ) limits_get( op, &op->o_ndn, &op->ors_limit );
1126
1127                 assert( op->ors_limit != NULL );
1128
1129                 /* if no limit is required, use soft limit */
1130                 if ( op->ors_tlimit == 0 ) {
1131                         op->ors_tlimit = op->ors_limit->lms_t_soft;
1132
1133                 /* limit required: check if legal */
1134                 } else {
1135                         if ( op->ors_limit->lms_t_hard == 0 ) {
1136                                 if ( op->ors_limit->lms_t_soft > 0
1137                                                 && ( op->ors_tlimit > op->ors_limit->lms_t_soft ) ) {
1138                                         op->ors_tlimit = op->ors_limit->lms_t_soft;
1139                                 }
1140
1141                         } else if ( op->ors_limit->lms_t_hard > 0 ) {
1142 #ifdef ABOVE_HARD_LIMIT_IS_ERROR
1143                                 if ( op->ors_tlimit == SLAP_MAX_LIMIT ) {
1144                                         op->ors_tlimit = op->ors_limit->lms_t_hard;
1145
1146                                 } else if ( op->ors_tlimit > op->ors_limit->lms_t_hard ) {
1147                                         /* error if exceeding hard limit */
1148                                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1149                                         send_ldap_result( op, rs );
1150                                         rs->sr_err = LDAP_SUCCESS;
1151                                         return -1;
1152                                 }
1153 #else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1154                                 if ( op->ors_tlimit > op->ors_limit->lms_t_hard ) {
1155                                         op->ors_tlimit = op->ors_limit->lms_t_hard;
1156                                 }
1157 #endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1158                         }
1159                 }
1160
1161                 /* else leave as is */
1162
1163                 /* don't even get to backend if candidate check is disabled */
1164                 if ( op->ors_limit->lms_s_unchecked == 0 ) {
1165                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1166                         send_ldap_result( op, rs );
1167                         rs->sr_err = LDAP_SUCCESS;
1168                         return -1;
1169                 }
1170
1171                 /* if paged results is requested */
1172                 if ( get_pagedresults( op ) > SLAP_CONTROL_IGNORED ) {
1173                         int     slimit = -2;
1174                         int     pr_total;
1175                         PagedResultsState *ps = op->o_pagedresults_state;
1176
1177                         /* paged results is not allowed */
1178                         if ( op->ors_limit->lms_s_pr_total == -2 ) {
1179                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1180                                 rs->sr_text = "pagedResults control not allowed";
1181                                 send_ldap_result( op, rs );
1182                                 rs->sr_err = LDAP_SUCCESS;
1183                                 rs->sr_text = NULL;
1184                                 return -1;
1185                         }
1186
1187                         if ( op->ors_limit->lms_s_pr > 0 && ps->ps_size > op->ors_limit->lms_s_pr ) {
1188                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1189                                 rs->sr_text = "illegal pagedResults page size";
1190                                 send_ldap_result( op, rs );
1191                                 rs->sr_err = LDAP_SUCCESS;
1192                                 rs->sr_text = NULL;
1193                                 return -1;
1194                         }
1195
1196                         if ( op->ors_limit->lms_s_pr_total == 0 ) {
1197                                 if ( op->ors_limit->lms_s_hard == 0 ) {
1198                                         pr_total = op->ors_limit->lms_s_soft;
1199                                 } else {
1200                                         pr_total = op->ors_limit->lms_s_hard;
1201                                 }
1202                         } else {
1203                                 pr_total = op->ors_limit->lms_s_pr_total;
1204                         }
1205
1206                         if ( pr_total == -1 ) {
1207                                 if ( op->ors_slimit == 0 || op->ors_slimit == SLAP_MAX_LIMIT ) {
1208                                         slimit = -1;
1209
1210                                 } else {
1211                                         slimit = op->ors_slimit - ps->ps_count;
1212                                 }
1213
1214 #ifdef ABOVE_HARD_LIMIT_IS_ERROR
1215                         } else if ( pr_total > 0 && op->ors_slimit != SLAP_MAX_LIMIT
1216                                         && ( op->ors_slimit == SLAP_NO_LIMIT || op->ors_slimit > pr_total ) )
1217                         {
1218                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1219                                 send_ldap_result( op, rs );
1220                                 rs->sr_err = LDAP_SUCCESS;
1221                                 return -1;
1222 #endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1223
1224                         } else {
1225                                 /* if no limit is required, use soft limit */
1226                                 int     total;
1227                                 int     slimit2;
1228
1229                                 /* first round of pagedResults: set count to any appropriate limit */
1230
1231                                 /* if the limit is set, check that it does not violate any server-side limit */
1232 #ifdef ABOVE_HARD_LIMIT_IS_ERROR
1233                                 if ( op->ors_slimit == SLAP_MAX_LIMIT ) {
1234                                         slimit2 = op->ors_slimit = pr_total;
1235 #else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1236                                 if ( op->ors_slimit == SLAP_MAX_LIMIT || op->ors_slimit > pr_total ) {
1237                                         slimit2 = op->ors_slimit = pr_total;
1238 #endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1239
1240                                 } else if ( op->ors_slimit == 0 ) {
1241                                         slimit2 = pr_total;
1242
1243                                 } else {
1244                                         slimit2 = op->ors_slimit;
1245                                 }
1246
1247                                 total = slimit2 - ps->ps_count;
1248
1249                                 if ( total >= 0 ) {
1250                                         if ( op->ors_limit->lms_s_pr > 0 ) {
1251                                                 /* use the smallest limit set by total/per page */
1252                                                 if ( total < op->ors_limit->lms_s_pr ) {
1253                                                         slimit = total;
1254
1255                                                 } else {
1256                                                         /* use the perpage limit if any
1257                                                          * NOTE: + 1 because the given value must be legal */
1258                                                         slimit = op->ors_limit->lms_s_pr + 1;
1259                                                 }
1260
1261                                         } else {
1262                                                 /* use the total limit if any */
1263                                                 slimit = total;
1264                                         }
1265
1266                                 } else if ( op->ors_limit->lms_s_pr > 0 ) {
1267                                         /* use the perpage limit if any
1268                                          * NOTE: + 1 because the given value must be legal */
1269                                         slimit = op->ors_limit->lms_s_pr + 1;
1270
1271                                 } else {
1272                                         /* use the standard hard/soft limit if any */
1273                                         slimit = op->ors_limit->lms_s_hard;
1274                                 }
1275                         }
1276
1277                         /* if got any limit, use it */
1278                         if ( slimit != -2 ) {
1279                                 if ( op->ors_slimit == 0 ) {
1280                                         op->ors_slimit = slimit;
1281
1282                                 } else if ( slimit > 0 ) {
1283                                         if ( op->ors_slimit - ps->ps_count > slimit ) {
1284                                                 rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1285                                                 send_ldap_result( op, rs );
1286                                                 rs->sr_err = LDAP_SUCCESS;
1287                                                 return -1;
1288                                         }
1289                                         op->ors_slimit = slimit;
1290
1291                                 } else if ( slimit == 0 ) {
1292                                         op->ors_slimit = 0;
1293                                 }
1294
1295                         } else {
1296                                 /* use the standard hard/soft limit if any */
1297                                 op->ors_slimit = pr_total;
1298                         }
1299
1300                 /* no limit requested: use soft, whatever it is */
1301                 } else if ( op->ors_slimit == 0 ) {
1302                         op->ors_slimit = op->ors_limit->lms_s_soft;
1303
1304                 /* limit requested: check if legal */
1305                 } else {
1306                         /* hard limit as soft (traditional behavior) */
1307                         if ( op->ors_limit->lms_s_hard == 0 ) {
1308                                 if ( op->ors_limit->lms_s_soft > 0
1309                                                 && op->ors_slimit > op->ors_limit->lms_s_soft ) {
1310                                         op->ors_slimit = op->ors_limit->lms_s_soft;
1311                                 }
1312
1313                         /* explicit hard limit: error if violated */
1314                         } else if ( op->ors_limit->lms_s_hard > 0 ) {
1315 #ifdef ABOVE_HARD_LIMIT_IS_ERROR
1316                                 if ( op->ors_slimit == SLAP_MAX_LIMIT ) {
1317                                         op->ors_slimit = op->ors_limit->lms_s_hard;
1318
1319                                 } else if ( op->ors_slimit > op->ors_limit->lms_s_hard ) {
1320                                         /* if limit exceeds hard, error */
1321                                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
1322                                         send_ldap_result( op, rs );
1323                                         rs->sr_err = LDAP_SUCCESS;
1324                                         return -1;
1325                                 }
1326 #else /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1327                                 if ( op->ors_slimit > op->ors_limit->lms_s_hard ) {
1328                                         op->ors_slimit = op->ors_limit->lms_s_hard;
1329                                 }
1330 #endif /* ! ABOVE_HARD_LIMIT_IS_ERROR */
1331                         }
1332                 }
1333
1334                 /* else leave as is */
1335         }
1336
1337         return 0;
1338 }
1339
1340 void
1341 limits_destroy(
1342         struct slap_limits      **lm )
1343 {
1344         int             i;
1345
1346         if ( lm == NULL ) {
1347                 return;
1348         }
1349
1350         for ( i = 0; lm[ i ]; i++ ) {
1351                 switch ( lm[ i ]->lm_flags & SLAP_LIMITS_MASK ) {
1352                 case SLAP_LIMITS_REGEX:
1353                         regfree( &lm[ i ]->lm_regex );
1354                         break;
1355
1356                 case SLAP_LIMITS_EXACT:
1357                 case SLAP_LIMITS_ONE:
1358                 case SLAP_LIMITS_SUBTREE:
1359                 case SLAP_LIMITS_CHILDREN:
1360                         if ( !BER_BVISNULL( &lm[ i ]->lm_pat ) ) {
1361                                 ch_free( lm[ i ]->lm_pat.bv_val );
1362                         }
1363                         break;
1364
1365                 default:
1366                         break;
1367                 }
1368
1369                 ch_free( lm[ i ] );
1370         }
1371
1372         ch_free( lm );
1373 }