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

   1 /* $OpenLDAP$ */
   2 /* constraint.c - Overlay to constrain attributes to certain values */
   3 /*
   4  * Copyright 2003-2004 Hewlett-Packard Company
   5  * Copyright 2007 Emmanuel Dreyfus
   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  * Authors: Neil Dunbar <neil.dunbar@hp.com>
  18  *                      Emmannuel Dreyfus <manu@netbsd.org>
  19  */
  20 #include "portable.h"
  21
  22 #ifdef SLAPD_OVER_CONSTRAINT
  23
  24 #include <stdio.h>
  25
  26 #include <ac/string.h>
  27 #include <ac/socket.h>
  28 #include <ac/regex.h>
  29
  30 #include "lutil.h"
  31 #include "slap.h"
  32 #include "config.h"
  33
  34 /*
  35  * This overlay limits the values which can be placed into an
  36  * attribute, over and above the limits placed by the schema.
  37  *
  38  * It traps only LDAP adds and modify commands (and only seeks to
  39  * control the add and modify value mods of a modify)
  40  */
  41
  42 #define REGEX_STR "regex"
  43 #define URI_STR "uri"
  44 #define SET_STR "set"
  45 #define SIZE_STR "size"
  46 #define COUNT_STR "count"
  47
  48 /*
  49  * Linked list of attribute constraints which we should enforce.
  50  * This is probably a sub optimal structure - some form of sorted
  51  * array would be better if the number of attributes contrained is
  52  * likely to be much bigger than 4 or 5. We stick with a list for
  53  * the moment.
  54  */
  55
  56 typedef struct constraint {
  57         struct constraint *ap_next;
  58         AttributeDescription **ap;
  59
  60         LDAPURLDesc *restrict_lud;
  61         struct berval restrict_ndn;
  62         Filter *restrict_filter;
  63         struct berval restrict_val;
  64
  65         regex_t *re;
  66         LDAPURLDesc *lud;
  67         int set;
  68         size_t size;
  69         size_t count;
  70         AttributeDescription **attrs;
  71         struct berval val; /* constraint value */
  72         struct berval dn;
  73         struct berval filter;
  74 } constraint;
  75
  76 enum {
  77         CONSTRAINT_ATTRIBUTE = 1
  78 };
  79
  80 static ConfigDriver constraint_cf_gen;
  81
  82 static ConfigTable constraintcfg[] = {
  83         { "constraint_attribute", "attribute[list]> (regex|uri|set|size|count) <value> [<restrict URI>]",
  84           4, 0, 0, ARG_MAGIC | CONSTRAINT_ATTRIBUTE, constraint_cf_gen,
  85           "( OLcfgOvAt:13.1 NAME 'olcConstraintAttribute' "
  86           "DESC 'constraint for list of attributes' "
  87           "EQUALITY caseIgnoreMatch "
  88           "SYNTAX OMsDirectoryString )", NULL, NULL },
  89         { NULL, NULL, 0, 0, 0, ARG_IGNORED }
  90 };
  91
  92 static ConfigOCs constraintocs[] = {
  93         { "( OLcfgOvOc:13.1 "
  94           "NAME 'olcConstraintConfig' "
  95           "DESC 'Constraint overlay configuration' "
  96           "SUP olcOverlayConfig "
  97           "MAY ( olcConstraintAttribute ) )",
  98           Cft_Overlay, constraintcfg },
  99         { NULL, 0, NULL }
 100 };
 101
 102 static void
 103 constraint_free( constraint *cp, int freeme )
 104 {
 105         if (cp->restrict_lud)
 106                 ldap_free_urldesc(cp->restrict_lud);
 107         if (!BER_BVISNULL(&cp->restrict_ndn))
 108                 ch_free(cp->restrict_ndn.bv_val);
 109         if (cp->restrict_filter != NULL && cp->restrict_filter != slap_filter_objectClass_pres)
 110                 filter_free(cp->restrict_filter);
 111         if (!BER_BVISNULL(&cp->restrict_val))
 112                 ch_free(cp->restrict_val.bv_val);
 113         if (cp->re) {
 114                 regfree(cp->re);
 115                 ch_free(cp->re);
 116         }
 117         if (!BER_BVISNULL(&cp->val))
 118                 ch_free(cp->val.bv_val);
 119         if (cp->lud)
 120                 ldap_free_urldesc(cp->lud);
 121         if (cp->attrs)
 122                 ch_free(cp->attrs);
 123         if (cp->ap)
 124                 ch_free(cp->ap);
 125         if (freeme)
 126                 ch_free(cp);
 127 }
 128
 129 static int
 130 constraint_cf_gen( ConfigArgs *c )
 131 {
 132         slap_overinst *on = (slap_overinst *)(c->bi);
 133         constraint *cn = on->on_bi.bi_private, *cp;
 134         struct berval bv;
 135         int i, rc = 0;
 136         constraint ap = { NULL };
 137         const char *text = NULL;
 138
 139         switch ( c->op ) {
 140         case SLAP_CONFIG_EMIT:
 141                 switch (c->type) {
 142                 case CONSTRAINT_ATTRIBUTE:
 143                         for (cp=cn; cp; cp=cp->ap_next) {
 144                                 char *s;
 145                                 char *tstr = NULL;
 146                                 int quotes = 0;
 147                                 int j;
 148                                 size_t val;
 149                                 char val_buf[SLAP_TEXT_BUFLEN] = { '\0' };
 150
 151                                 bv.bv_len = STRLENOF("  ");
 152                                 for (j = 0; cp->ap[j]; j++) {
 153                                         bv.bv_len += cp->ap[j]->ad_cname.bv_len;
 154                                 }
 155
 156                                 /* room for commas */
 157                                 bv.bv_len += j - 1;
 158
 159                                 if (cp->re) {
 160                                         tstr = REGEX_STR;
 161                                         quotes = 1;
 162                                 } else if (cp->lud) {
 163                                         tstr = URI_STR;
 164                                         quotes = 1;
 165                                 } else if (cp->set) {
 166                                         tstr = SET_STR;
 167                                         quotes = 1;
 168                                 } else if (cp->size) {
 169                                         tstr = SIZE_STR;
 170                                         val = cp->size;
 171                                 } else if (cp->count) {
 172                                         tstr = COUNT_STR;
 173                                         val = cp->count;
 174                                 }
 175
 176                                 bv.bv_len += strlen(tstr);
 177                                 bv.bv_len += cp->val.bv_len + 2*quotes;
 178
 179                                 if (cp->restrict_lud != NULL) {
 180                                         bv.bv_len += cp->restrict_val.bv_len + STRLENOF(" restrict=\"\"");
 181                                 }
 182
 183                                 if (cp->count || cp->size) {
 184                                         int len = snprintf(val_buf, sizeof(val_buf), "%d", val);
 185                                         if (len <= 0) {
 186                                                 /* error */
 187                                                 return -1;
 188                                         }
 189                                         bv.bv_len += len;
 190                                 }
 191
 192                                 s = bv.bv_val = ch_malloc(bv.bv_len + 1);
 193
 194                                 s = lutil_strncopy( s, cp->ap[0]->ad_cname.bv_val, cp->ap[0]->ad_cname.bv_len );
 195                                 for (j = 1; cp->ap[j]; j++) {
 196                                         *s++ = ',';
 197                                         s = lutil_strncopy( s, cp->ap[j]->ad_cname.bv_val, cp->ap[j]->ad_cname.bv_len );
 198                                 }
 199                                 *s++ = ' ';
 200                                 s = lutil_strcopy( s, tstr );
 201                                 *s++ = ' ';
 202                                 if (cp->count || cp->size) {
 203                                         s = lutil_strcopy( s, val_buf );
 204                                 } else {
 205                                         if ( quotes ) *s++ = '"';
 206                                         s = lutil_strncopy( s, cp->val.bv_val, cp->val.bv_len );
 207                                         if ( quotes ) *s++ = '"';
 208                                 }
 209                                 if (cp->restrict_lud != NULL) {
 210                                         s = lutil_strcopy( s, " restrict=\"" );
 211                                         s = lutil_strncopy( s, cp->restrict_val.bv_val, cp->restrict_val.bv_len );
 212                                         *s++ = '"';
 213                                 }
 214                                 *s = '\0';
 215
 216                                 rc = value_add_one( &c->rvalue_vals, &bv );
 217                                 if (rc == LDAP_SUCCESS)
 218                                         rc = value_add_one( &c->rvalue_nvals, &bv );
 219                                 ch_free(bv.bv_val);
 220                                 if (rc) return rc;
 221                         }
 222                         break;
 223                 default:
 224                         abort();
 225                         break;
 226                 }
 227                 break;
 228         case LDAP_MOD_DELETE:
 229                 switch (c->type) {
 230                 case CONSTRAINT_ATTRIBUTE:
 231                         if (!cn) break; /* nothing to do */
 232
 233                         if (c->valx < 0) {
 234                                 /* zap all constraints */
 235                                 while (cn) {
 236                                         cp = cn->ap_next;
 237                                         constraint_free( cn, 1 );
 238                                         cn = cp;
 239                                 }
 240
 241                                 on->on_bi.bi_private = NULL;
 242                         } else {
 243                                 constraint **cpp;
 244
 245                                 /* zap constraint numbered 'valx' */
 246                                 for(i=0, cp = cn, cpp = &cn;
 247                                         (cp) && (i<c->valx);
 248                                         i++, cpp = &cp->ap_next, cp = *cpp);
 249
 250                                 if (cp) {
 251                                         /* zap cp, and join cpp to cp->ap_next */
 252                                         *cpp = cp->ap_next;
 253                                         constraint_free( cp, 1 );
 254                                 }
 255                                 on->on_bi.bi_private = cn;
 256                         }
 257                         break;
 258
 259                 default:
 260                         abort();
 261                         break;
 262                 }
 263                 break;
 264         case SLAP_CONFIG_ADD:
 265         case LDAP_MOD_ADD:
 266                 switch (c->type) {
 267                 case CONSTRAINT_ATTRIBUTE: {
 268                         int j;
 269                         char **attrs = ldap_str2charray( c->argv[1], "," );
 270
 271                         for ( j = 0; attrs[j]; j++)
 272                                 /* just count */ ;
 273                         ap.ap = ch_calloc( sizeof(AttributeDescription*), j + 1 );
 274                         for ( j = 0; attrs[j]; j++) {
 275                                 if ( slap_str2ad( attrs[j], &ap.ap[j], &text ) ) {
 276                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 277                                                 "%s <%s>: %s\n", c->argv[0], attrs[j], text );
 278                                         rc = ARG_BAD_CONF;
 279                                         goto done;
 280                                 }
 281                         }
 282
 283                         if ( strcasecmp( c->argv[2], REGEX_STR ) == 0) {
 284                                 int err;
 285
 286                                 ap.re = ch_malloc( sizeof(regex_t) );
 287                                 if ((err = regcomp( ap.re,
 288                                         c->argv[3], REG_EXTENDED )) != 0) {
 289                                         char errmsg[1024];
 290
 291                                         regerror( err, ap.re, errmsg, sizeof(errmsg) );
 292                                         ch_free(ap.re);
 293                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 294                                                 "%s %s: Illegal regular expression \"%s\": Error %s",
 295                                                 c->argv[0], c->argv[1], c->argv[3], errmsg);
 296                                         ap.re = NULL;
 297                                         rc = ARG_BAD_CONF;
 298                                         goto done;
 299                                 }
 300                                 ber_str2bv( c->argv[3], 0, 1, &ap.val );
 301                         } else if ( strcasecmp( c->argv[2], SIZE_STR ) == 0 ) {
 302                                 size_t size;
 303
 304                                 if ( ( size = atoi(c->argv[3]) ) != 0 )
 305                                         ap.size = size;
 306                         } else if ( strcasecmp( c->argv[2], COUNT_STR ) == 0 ) {
 307                                 size_t count;
 308
 309                                 if ( ( count = atoi(c->argv[3]) ) != 0 )
 310                                         ap.count = count;
 311                         } else if ( strcasecmp( c->argv[2], URI_STR ) == 0 ) {
 312                                 int err;
 313
 314                                 err = ldap_url_parse(c->argv[3], &ap.lud);
 315                                 if ( err != LDAP_URL_SUCCESS ) {
 316                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 317                                                 "%s %s: Invalid URI \"%s\"",
 318                                                 c->argv[0], c->argv[1], c->argv[3]);
 319                                         rc = ARG_BAD_CONF;
 320                                         goto done;
 321                                 }
 322
 323                                 if (ap.lud->lud_host != NULL) {
 324                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 325                                                 "%s %s: unsupported hostname in URI \"%s\"",
 326                                                 c->argv[0], c->argv[1], c->argv[3]);
 327                                         ldap_free_urldesc(ap.lud);
 328                                         rc = ARG_BAD_CONF;
 329                                         goto done;
 330                                 }
 331
 332                                 for ( i=0; ap.lud->lud_attrs[i]; i++);
 333                                 /* FIXME: This is worthless without at least one attr */
 334                                 if ( i ) {
 335                                         ap.attrs = ch_malloc( (i+1)*sizeof(AttributeDescription *));
 336                                         for ( i=0; ap.lud->lud_attrs[i]; i++) {
 337                                                 ap.attrs[i] = NULL;
 338                                                 if ( slap_str2ad( ap.lud->lud_attrs[i], &ap.attrs[i], &text ) ) {
 339                                                         ch_free( ap.attrs );
 340                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 341                                                                 "%s <%s>: %s\n", c->argv[0], ap.lud->lud_attrs[i], text );
 342                                                         rc = ARG_BAD_CONF;
 343                                                         goto done;
 344                                                 }
 345                                         }
 346                                         ap.attrs[i] = NULL;
 347                                 }
 348
 349                                 if (ap.lud->lud_dn == NULL) {
 350                                         ap.lud->lud_dn = ch_strdup("");
 351                                 } else {
 352                                         struct berval dn, ndn;
 353
 354                                         ber_str2bv( ap.lud->lud_dn, 0, 0, &dn );
 355                                         if (dnNormalize( 0, NULL, NULL, &dn, &ndn, NULL ) ) {
 356                                                 /* cleanup */
 357                                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 358                                                         "%s %s: URI %s DN normalization failed",
 359                                                         c->argv[0], c->argv[1], c->argv[3] );
 360                                                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 361                                                            "%s: %s\n", c->log, c->cr_msg, 0 );
 362                                                 rc = ARG_BAD_CONF;
 363                                                 goto done;
 364                                         }
 365                                         ldap_memfree( ap.lud->lud_dn );
 366                                         ap.lud->lud_dn = ndn.bv_val;
 367                                 }
 368
 369                                 if (ap.lud->lud_filter == NULL) {
 370                                         ap.lud->lud_filter = ch_strdup("objectClass=*");
 371                                 } else if ( ap.lud->lud_filter[0] == '(' ) {
 372                                         ber_len_t len = strlen( ap.lud->lud_filter );
 373                                         if ( ap.lud->lud_filter[len - 1] != ')' ) {
 374                                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 375                                                         "%s %s: invalid URI filter: %s",
 376                                                         c->argv[0], c->argv[1], ap.lud->lud_filter );
 377                                                 rc = ARG_BAD_CONF;
 378                                                 goto done;
 379                                         }
 380                                         AC_MEMCPY( &ap.lud->lud_filter[0], &ap.lud->lud_filter[1], len - 2 );
 381                                         ap.lud->lud_filter[len - 2] = '\0';
 382                                 }
 383
 384                                 ber_str2bv( c->argv[3], 0, 1, &ap.val );
 385
 386                         } else if ( strcasecmp( c->argv[2], SET_STR ) == 0 ) {
 387                                 ap.set = 1;
 388                                 ber_str2bv( c->argv[3], 0, 1, &ap.val );
 389
 390                         } else {
 391                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 392                                         "%s %s: Unknown constraint type: %s",
 393                                         c->argv[0], c->argv[1], c->argv[2] );
 394                                 rc = ARG_BAD_CONF;
 395                                 goto done;
 396                         }
 397
 398                         if ( c->argc > 4 ) {
 399                                 int argidx;
 400
 401                                 for ( argidx = 4; argidx < c->argc; argidx++ ) {
 402                                         if ( strncasecmp( c->argv[argidx], "restrict=", STRLENOF("restrict=") ) == 0 ) {
 403                                                 int err;
 404                                                 char *arg = c->argv[argidx] + STRLENOF("restrict=");
 405
 406                                                 err = ldap_url_parse(arg, &ap.restrict_lud);
 407                                                 if ( err != LDAP_URL_SUCCESS ) {
 408                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 409                                                                 "%s %s: Invalid restrict URI \"%s\"",
 410                                                                 c->argv[0], c->argv[1], arg);
 411                                                         rc = ARG_BAD_CONF;
 412                                                         goto done;
 413                                                 }
 414
 415                                                 if (ap.restrict_lud->lud_host != NULL) {
 416                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 417                                                                 "%s %s: unsupported hostname in restrict URI \"%s\"",
 418                                                                 c->argv[0], c->argv[1], arg);
 419                                                         rc = ARG_BAD_CONF;
 420                                                         goto done;
 421                                                 }
 422
 423                                                 if ( ap.restrict_lud->lud_attrs != NULL ) {
 424                                                         if ( ap.restrict_lud->lud_attrs[0] != '\0' ) {
 425                                                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 426                                                                         "%s %s: attrs not allowed in restrict URI %s\n",
 427                                                                         c->argv[0], c->argv[1], arg);
 428                                                                 rc = ARG_BAD_CONF;
 429                                                                 goto done;
 430                                                         }
 431                                                         ldap_memvfree((void *)ap.restrict_lud->lud_attrs);
 432                                                         ap.restrict_lud->lud_attrs = NULL;
 433                                                 }
 434
 435                                                 if (ap.restrict_lud->lud_dn != NULL) {
 436                                                         if (ap.restrict_lud->lud_dn[0] == '\0') {
 437                                                                 ldap_memfree(ap.restrict_lud->lud_dn);
 438                                                                 ap.restrict_lud->lud_dn = NULL;
 439
 440                                                         } else {
 441                                                                 struct berval dn, ndn;
 442                                                                 int j;
 443
 444                                                                 ber_str2bv(ap.restrict_lud->lud_dn, 0, 0, &dn);
 445                                                                 if (dnNormalize(0, NULL, NULL, &dn, &ndn, NULL)) {
 446                                                                         /* cleanup */
 447                                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 448                                                                                 "%s %s: restrict URI %s DN normalization failed",
 449                                                                                 c->argv[0], c->argv[1], arg );
 450                                                                         rc = ARG_BAD_CONF;
 451                                                                         goto done;
 452                                                                 }
 453
 454                                                                 assert(c->be != NULL);
 455                                                                 if (c->be->be_nsuffix == NULL) {
 456                                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 457                                                                                 "%s %s: restrict URI requires suffix",
 458                                                                                 c->argv[0], c->argv[1] );
 459                                                                         rc = ARG_BAD_CONF;
 460                                                                         goto done;
 461                                                                 }
 462
 463                                                                 for ( j = 0; !BER_BVISNULL(&c->be->be_nsuffix[j]); j++) {
 464                                                                         if (dnIsSuffix(&ndn, &c->be->be_nsuffix[j])) break;
 465                                                                 }
 466
 467                                                                 if (BER_BVISNULL(&c->be->be_nsuffix[j])) {
 468                                                                         /* error */
 469                                                                         snprintf( c->cr_msg, sizeof( c->cr_msg ),
 470                                                                                 "%s %s: restrict URI DN %s not within database naming context(s)",
 471                                                                                 c->argv[0], c->argv[1], dn.bv_val );
 472                                                                         rc = ARG_BAD_CONF;
 473                                                                         goto done;
 474                                                                 }
 475
 476                                                                 ap.restrict_ndn = ndn;
 477                                                         }
 478                                                 }
 479
 480                                                 if (ap.restrict_lud->lud_filter != NULL) {
 481                                                         ap.restrict_filter = str2filter(ap.restrict_lud->lud_filter);
 482                                                         if (ap.restrict_filter == NULL) {
 483                                                                 /* error */
 484                                                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 485                                                                         "%s %s: restrict URI filter %s invalid",
 486                                                                         c->argv[0], c->argv[1], ap.restrict_lud->lud_filter );
 487                                                                 rc = ARG_BAD_CONF;
 488                                                                 goto done;
 489                                                         }
 490                                                 }
 491
 492                                                 ber_str2bv(c->argv[argidx] + STRLENOF("restrict="), 0, 1, &ap.restrict_val);
 493
 494                                         } else {
 495                                                 /* cleanup */
 496                                                 snprintf( c->cr_msg, sizeof( c->cr_msg ),
 497                                                         "%s %s: unrecognized arg #%d (%s)",
 498                                                         c->argv[0], c->argv[1], argidx, c->argv[argidx] );
 499                                                 rc = ARG_BAD_CONF;
 500                                                 goto done;
 501                                         }
 502                                 }
 503                         }
 504
 505 done:;
 506                         if ( rc == LDAP_SUCCESS ) {
 507                                 constraint *a2 = ch_calloc( sizeof(constraint), 1 );
 508                                 a2->ap_next = on->on_bi.bi_private;
 509                                 a2->ap = ap.ap;
 510                                 a2->re = ap.re;
 511                                 a2->val = ap.val;
 512                                 a2->lud = ap.lud;
 513                                 a2->set = ap.set;
 514                                 a2->size = ap.size;
 515                                 a2->count = ap.count;
 516                                 if ( a2->lud ) {
 517                                         ber_str2bv(a2->lud->lud_dn, 0, 0, &a2->dn);
 518                                         ber_str2bv(a2->lud->lud_filter, 0, 0, &a2->filter);
 519                                 }
 520                                 a2->attrs = ap.attrs;
 521                                 a2->restrict_lud = ap.restrict_lud;
 522                                 a2->restrict_ndn = ap.restrict_ndn;
 523                                 a2->restrict_filter = ap.restrict_filter;
 524                                 a2->restrict_val = ap.restrict_val;
 525                                 on->on_bi.bi_private = a2;
 526
 527                         } else {
 528                                 Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
 529                                            "%s: %s\n", c->log, c->cr_msg, 0 );
 530                                 constraint_free( &ap, 0 );
 531                         }
 532
 533                         ldap_memvfree((void**)attrs);
 534                         } break;
 535                 default:
 536                         abort();
 537                         break;
 538                 }
 539                 break;
 540         default:
 541                 abort();
 542         }
 543
 544         return rc;
 545 }
 546
 547 static int
 548 constraint_uri_cb( Operation *op, SlapReply *rs )
 549 {
 550         if(rs->sr_type == REP_SEARCH) {
 551                 int *foundp = op->o_callback->sc_private;
 552
 553                 *foundp = 1;
 554
 555                 Debug(LDAP_DEBUG_TRACE, "==> constraint_uri_cb <%s>\n",
 556                         rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);
 557         }
 558         return 0;
 559 }
 560
 561 static int
 562 constraint_violation( constraint *c, struct berval *bv, Operation *op )
 563 {
 564         if ((!c) || (!bv)) return LDAP_SUCCESS;
 565
 566         if ((c->re) &&
 567                 (regexec(c->re, bv->bv_val, 0, NULL, 0) == REG_NOMATCH))
 568                 return LDAP_CONSTRAINT_VIOLATION; /* regular expression violation */
 569
 570         if ((c->size) && (bv->bv_len > c->size))
 571                 return LDAP_CONSTRAINT_VIOLATION; /* size violation */
 572
 573         if (c->lud) {
 574                 Operation nop = *op;
 575                 slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 576                 slap_callback cb;
 577                 int i;
 578                 int found = 0;
 579                 int rc;
 580                 size_t len;
 581                 struct berval filterstr;
 582                 char *ptr;
 583
 584                 cb.sc_next = NULL;
 585                 cb.sc_response = constraint_uri_cb;
 586                 cb.sc_cleanup = NULL;
 587                 cb.sc_private = &found;
 588
 589                 nop.o_protocol = LDAP_VERSION3;
 590                 nop.o_tag = LDAP_REQ_SEARCH;
 591                 nop.o_time = slap_get_time();
 592                 if (c->lud->lud_dn) {
 593                         struct berval dn;
 594
 595                         ber_str2bv(c->lud->lud_dn, 0, 0, &dn);
 596                         nop.o_req_dn = dn;
 597                         nop.o_req_ndn = dn;
 598                         nop.o_bd = select_backend(&nop.o_req_ndn, 1 );
 599                         if (!nop.o_bd) {
 600                                 return LDAP_NO_SUCH_OBJECT; /* unexpected error */
 601                         }
 602                         if (!nop.o_bd->be_search) {
 603                                 return LDAP_OTHER; /* unexpected error */
 604                         }
 605                 } else {
 606                         nop.o_req_dn = nop.o_bd->be_nsuffix[0];
 607                         nop.o_req_ndn = nop.o_bd->be_nsuffix[0];
 608                         nop.o_bd = on->on_info->oi_origdb;
 609                 }
 610                 nop.o_do_not_cache = 1;
 611                 nop.o_callback = &cb;
 612
 613                 nop.ors_scope = c->lud->lud_scope;
 614                 nop.ors_deref = LDAP_DEREF_NEVER;
 615                 nop.ors_slimit = SLAP_NO_LIMIT;
 616                 nop.ors_tlimit = SLAP_NO_LIMIT;
 617                 nop.ors_limit = NULL;
 618
 619                 nop.ors_attrsonly = 0;
 620                 nop.ors_attrs = slap_anlist_no_attrs;
 621
 622                 len = STRLENOF("(&(") +
 623                           c->filter.bv_len +
 624                           STRLENOF(")(|");
 625
 626                 for (i = 0; c->attrs[i]; i++) {
 627                         len += STRLENOF("(") +
 628                                    c->attrs[i]->ad_cname.bv_len +
 629                                    STRLENOF("=") +
 630                                    bv->bv_len +
 631                                    STRLENOF(")");
 632                 }
 633
 634                 len += STRLENOF("))");
 635                 filterstr.bv_len = len;
 636                 filterstr.bv_val = op->o_tmpalloc(len + 1, op->o_tmpmemctx);
 637
 638                 ptr = filterstr.bv_val +
 639                         snprintf(filterstr.bv_val, len, "(&(%s)(|", c->lud->lud_filter);
 640                 for (i = 0; c->attrs[i]; i++) {
 641                         *ptr++ = '(';
 642                         ptr = lutil_strcopy( ptr, c->attrs[i]->ad_cname.bv_val );
 643                         *ptr++ = '=';
 644                         ptr = lutil_strcopy( ptr, bv->bv_val );
 645                         *ptr++ = ')';
 646                 }
 647                 *ptr++ = ')';
 648                 *ptr++ = ')';
 649                 *ptr++ = '\0';
 650
 651                 nop.ors_filterstr = filterstr;
 652                 nop.ors_filter = str2filter_x(&nop, filterstr.bv_val);
 653                 if ( nop.ors_filter == NULL ) {
 654                         Debug( LDAP_DEBUG_ANY,
 655                                 "%s constraint_violation uri filter=\"%s\" invalid\n",
 656                                 op->o_log_prefix, filterstr.bv_val, 0 );
 657                         rc = LDAP_OTHER;
 658
 659                 } else {
 660                         SlapReply nrs = { REP_RESULT };
 661
 662                         Debug(LDAP_DEBUG_TRACE,
 663                                 "==> constraint_violation uri filter = %s\n",
 664                                 filterstr.bv_val, 0, 0);
 665
 666                         rc = nop.o_bd->be_search( &nop, &nrs );
 667
 668                         Debug(LDAP_DEBUG_TRACE,
 669                                 "==> constraint_violation uri rc = %d, found = %d\n",
 670                                 rc, found, 0);
 671                 }
 672                 op->o_tmpfree(filterstr.bv_val, op->o_tmpmemctx);
 673
 674                 if ((rc != LDAP_SUCCESS) && (rc != LDAP_NO_SUCH_OBJECT)) {
 675                         return rc; /* unexpected error */
 676                 }
 677
 678                 if (!found)
 679                         return LDAP_CONSTRAINT_VIOLATION; /* constraint violation */
 680         }
 681
 682         return LDAP_SUCCESS;
 683 }
 684
 685 static char *
 686 print_message( struct berval *errtext, AttributeDescription *a )
 687 {
 688         char *ret;
 689         int sz;
 690
 691         sz = errtext->bv_len + sizeof(" on ") + a->ad_cname.bv_len;
 692         ret = ch_malloc(sz);
 693         snprintf( ret, sz, "%s on %s", errtext->bv_val, a->ad_cname.bv_val );
 694         return ret;
 695 }
 696
 697 static unsigned
 698 constraint_count_attr(Entry *e, AttributeDescription *ad)
 699 {
 700         struct Attribute *a;
 701
 702         if ((a = attr_find(e->e_attrs, ad)) != NULL)
 703                 return a->a_numvals;
 704         return 0;
 705 }
 706
 707 static int
 708 constraint_check_restrict( Operation *op, constraint *c, Entry *e )
 709 {
 710         assert( c->restrict_lud != NULL );
 711
 712         if ( c->restrict_lud->lud_dn != NULL ) {
 713                 int diff = e->e_nname.bv_len - c->restrict_ndn.bv_len;
 714
 715                 if ( diff < 0 ) {
 716                         return 0;
 717                 }
 718
 719                 if ( c->restrict_lud->lud_scope == LDAP_SCOPE_BASE ) {
 720                         return bvmatch( &e->e_nname, &c->restrict_ndn );
 721                 }
 722
 723                 if ( !dnIsSuffix( &e->e_nname, &c->restrict_ndn ) ) {
 724                         return 0;
 725                 }
 726
 727                 if ( c->restrict_lud->lud_scope != LDAP_SCOPE_SUBTREE ) {
 728                         struct berval pdn;
 729
 730                         if ( diff == 0 ) {
 731                                 return 0;
 732                         }
 733
 734                         dnParent( &e->e_nname, &pdn );
 735
 736                         if ( c->restrict_lud->lud_scope == LDAP_SCOPE_ONELEVEL
 737                                 && pdn.bv_len != c->restrict_ndn.bv_len )
 738                         {
 739                                 return 0;
 740                         }
 741                 }
 742         }
 743
 744         if ( c->restrict_filter != NULL ) {
 745                 int rc;
 746                 struct berval save_dn = op->o_dn, save_ndn = op->o_ndn;
 747
 748                 op->o_dn = op->o_bd->be_rootdn;
 749                 op->o_ndn = op->o_bd->be_rootndn;
 750                 rc = test_filter( op, e, c->restrict_filter );
 751                 op->o_dn = save_dn;
 752                 op->o_ndn = save_ndn;
 753
 754                 if ( rc != LDAP_COMPARE_TRUE ) {
 755                         return 0;
 756                 }
 757         }
 758
 759         return 1;
 760 }
 761
 762 static int
 763 constraint_add( Operation *op, SlapReply *rs )
 764 {
 765         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 766         Attribute *a;
 767         constraint *c = on->on_bi.bi_private, *cp;
 768         BerVarray b = NULL;
 769         int i;
 770         struct berval rsv = BER_BVC("add breaks constraint");
 771         int rc;
 772         char *msg = NULL;
 773
 774         if (get_relax(op)) {
 775                 return SLAP_CB_CONTINUE;
 776         }
 777
 778         if ((a = op->ora_e->e_attrs) == NULL) {
 779                 op->o_bd->bd_info = (BackendInfo *)(on->on_info);
 780                 send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
 781                         "constraint_add: no attrs");
 782                 return(rs->sr_err);
 783         }
 784
 785         for(; a; a = a->a_next ) {
 786                 /* we don't constrain operational attributes */
 787                 if (is_at_operational(a->a_desc->ad_type)) continue;
 788
 789                 for(cp = c; cp; cp = cp->ap_next) {
 790                         int j;
 791                         for (j = 0; cp->ap[j]; j++) {
 792                                 if (cp->ap[j] == a->a_desc) break;
 793                         }
 794                         if (cp->ap[j] == NULL) continue;
 795                         if ((b = a->a_vals) == NULL) continue;
 796
 797                         if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, op->ora_e) == 0) {
 798                                 continue;
 799                         }
 800
 801                         Debug(LDAP_DEBUG_TRACE,
 802                                 "==> constraint_add, "
 803                                 "a->a_numvals = %u, cp->count = %lu\n",
 804                                 a->a_numvals, (unsigned long) cp->count, 0);
 805
 806                         if ((cp->count != 0) && (a->a_numvals > cp->count)) {
 807                                 rc = LDAP_CONSTRAINT_VIOLATION;
 808                                 goto add_violation;
 809                         }
 810
 811                         for ( i = 0; b[i].bv_val; i++ ) {
 812                                 rc = constraint_violation( cp, &b[i], op );
 813                                 if ( rc ) {
 814                                         goto add_violation;
 815                                 }
 816                         }
 817
 818                         if (cp->set && acl_match_set(&cp->val, op, op->ora_e, NULL) == 0) {
 819                                 rc = LDAP_CONSTRAINT_VIOLATION;
 820                                 goto add_violation; /* constraint violation */
 821                         }
 822
 823                 }
 824         }
 825
 826         /* Default is to just fall through to the normal processing */
 827         return SLAP_CB_CONTINUE;
 828
 829 add_violation:
 830         op->o_bd->bd_info = (BackendInfo *)(on->on_info);
 831         if (rc == LDAP_CONSTRAINT_VIOLATION ) {
 832                 msg = print_message( &rsv, a->a_desc );
 833         }
 834         send_ldap_error(op, rs, rc, msg );
 835         ch_free(msg);
 836         return (rs->sr_err);
 837 }
 838
 839
 840 static int
 841 constraint_check_count_violation( Modifications *m, Entry *target_entry, constraint *cp )
 842 {
 843         BerVarray b = NULL;
 844         unsigned ce = 0;
 845         unsigned ca;
 846         int j;
 847
 848         for ( j = 0; cp->ap[j]; j++ ) {
 849                 ca = 0;
 850
 851                 /* Get this attribute count */
 852                 if ( target_entry )
 853                         ce = constraint_count_attr( target_entry, cp->ap[j] );
 854
 855                 for( ; m; m = m->sml_next ) {
 856                         if ( cp->ap[j] == m->sml_desc ) {
 857                                 switch ( m->sml_op ) {
 858                                 case LDAP_MOD_DELETE:
 859                                         if (( b = m->sml_values ) == NULL  || b[0].bv_val == NULL ) {
 860                                                 ce = 0;
 861                                         }
 862                                         else {
 863                                                 /* No need to check for values' validity. Invalid values
 864                                                  * cause the whole transaction to die anyway. */
 865                                                 for ( ca = 0; b[ca].bv_val; ++ca );
 866                                                 ce -= ca;
 867                                         }
 868                                         break;
 869
 870                                 case LDAP_MOD_ADD:
 871                                         if (( b = m->sml_values ) == NULL  || b[0].bv_val == NULL )
 872                                                 continue;
 873
 874                                         for ( ca = 0; b[ca].bv_val; ++ca );
 875                                         ce += ca;
 876                                         break;
 877
 878                                 case LDAP_MOD_REPLACE:
 879                                         if (( b = m->sml_values ) == NULL  || b[0].bv_val == NULL )
 880                                                 continue;
 881
 882                                         for ( ca = 0; b[ca].bv_val; ++ca );
 883                                         ce = ca;
 884                                         break;
 885
 886                                 default:
 887                                         /* impossible! assert? */
 888                                         return 1;
 889                                 }
 890
 891                                 Debug(LDAP_DEBUG_TRACE,
 892                                         "==> constraint_check_count_violation ce = %u, "
 893                                         "ca = %u, cp->count = %lu\n",
 894                                         ce, ca, (unsigned long) cp->count);
 895                         }
 896                 }
 897         }
 898
 899         return ( ce > cp->count );
 900 }
 901
 902 static int
 903 constraint_update( Operation *op, SlapReply *rs )
 904 {
 905         slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
 906         Backend *be = op->o_bd;
 907         constraint *c = on->on_bi.bi_private, *cp;
 908         Entry *target_entry = NULL, *target_entry_copy = NULL;
 909         Modifications *modlist, *m;
 910         BerVarray b = NULL;
 911         int i;
 912         struct berval rsv = BER_BVC("modify breaks constraint");
 913         int rc;
 914         char *msg = NULL;
 915         int is_v;
 916         int first = 1;
 917
 918         if (get_relax(op)) {
 919                 return SLAP_CB_CONTINUE;
 920         }
 921
 922         switch ( op->o_tag ) {
 923         case LDAP_REQ_MODIFY:
 924                 modlist = op->orm_modlist;
 925                 break;
 926
 927         case LDAP_REQ_MODRDN:
 928                 modlist = op->orr_modlist;
 929                 break;
 930
 931         default:
 932                 /* impossible! assert? */
 933                 return LDAP_OTHER;
 934         }
 935
 936         Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, "constraint_update()\n", 0,0,0);
 937         if ((m = modlist) == NULL) {
 938                 op->o_bd->bd_info = (BackendInfo *)(on->on_info);
 939                 send_ldap_error(op, rs, LDAP_INVALID_SYNTAX,
 940                                                 "constraint_update() got null modlist");
 941                 return(rs->sr_err);
 942         }
 943
 944         /* Do we need to count attributes? */
 945         for(cp = c; cp; cp = cp->ap_next) {
 946                 if (cp->count != 0 || cp->set || cp->restrict_lud != 0) {
 947                         if (first) {
 948                                 op->o_bd = on->on_info->oi_origdb;
 949                                 rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &target_entry );
 950                                 op->o_bd = be;
 951                                 first = 0;
 952                         }
 953                         if (rc != 0 || target_entry == NULL) {
 954                                 Debug(LDAP_DEBUG_TRACE,
 955                                         "==> constraint_update rc = %d DN=\"%s\"%s\n",
 956                                         rc, op->o_req_ndn.bv_val,
 957                                         target_entry ? "" : " not found" );
 958                                 if ( rc == 0 )
 959                                         rc = LDAP_CONSTRAINT_VIOLATION;
 960                                 goto mod_violation;
 961                         }
 962
 963                         is_v = constraint_check_count_violation(m, target_entry, cp);
 964
 965                         Debug(LDAP_DEBUG_TRACE,
 966                                 "==> constraint_update is_v: %d\n", is_v, 0, 0);
 967
 968                         if (is_v) {
 969                                 rc = LDAP_CONSTRAINT_VIOLATION;
 970                                 goto mod_violation;
 971                         }
 972                 }
 973         }
 974
 975         rc = LDAP_CONSTRAINT_VIOLATION;
 976         for(;m; m = m->sml_next) {
 977                 unsigned ce = 0;
 978
 979                 if (is_at_operational( m->sml_desc->ad_type )) continue;
 980
 981                 if ((( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_ADD) &&
 982                         (( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_REPLACE) &&
 983                         (( m->sml_op & LDAP_MOD_OP ) != LDAP_MOD_DELETE))
 984                         continue;
 985                 /* we only care about ADD and REPLACE modifications */
 986                 /* and DELETE are used to track attribute count */
 987                 if ((( b = m->sml_values ) == NULL ) || (b[0].bv_val == NULL))
 988                         continue;
 989
 990                 for(cp = c; cp; cp = cp->ap_next) {
 991                         int j;
 992                         for (j = 0; cp->ap[j]; j++) {
 993                                 if (cp->ap[j] == m->sml_desc) {
 994                                         break;
 995                                 }
 996                         }
 997                         if (cp->ap[j] == NULL) continue;
 998
 999                         if (cp->restrict_lud != NULL && constraint_check_restrict(op, cp, target_entry) == 0) {
1000                                 continue;
1001                         }
1002
1003                         /* DELETE are to be ignored beyond this point */
1004                         if (( m->sml_op & LDAP_MOD_OP ) == LDAP_MOD_DELETE)
1005                                 continue;
1006
1007                         for ( i = 0; b[i].bv_val; i++ ) {
1008                                 rc = constraint_violation( cp, &b[i], op );
1009                                 if ( rc ) {
1010                                         goto mod_violation;
1011                                 }
1012                         }
1013
1014                         if (cp->set && target_entry) {
1015                                 if (target_entry_copy == NULL) {
1016                                         Modifications *ml;
1017
1018                                         target_entry_copy = entry_dup(target_entry);
1019
1020                                         /* if rename, set the new entry's name
1021                                          * (in normalized form only) */
1022                                         if ( op->o_tag == LDAP_REQ_MODRDN ) {
1023                                                 struct berval pdn, ndn = BER_BVNULL;
1024
1025                                                 if ( op->orr_nnewSup ) {
1026                                                         pdn = *op->orr_nnewSup;
1027
1028                                                 } else {
1029                                                         dnParent( &target_entry_copy->e_nname, &pdn );
1030                                                 }
1031
1032                                                 build_new_dn( &ndn, &pdn, &op->orr_nnewrdn, NULL );
1033
1034                                                 ber_memfree( target_entry_copy->e_nname.bv_val );
1035                                                 target_entry_copy->e_nname = ndn;
1036                                                 ber_bvreplace( &target_entry_copy->e_name, &ndn );
1037                                         }
1038
1039                                         /* apply modifications, in an attempt
1040                                          * to estimate what the entry would
1041                                          * look like in case all modifications
1042                                          * pass */
1043                                         for ( ml = modlist; ml; ml = ml->sml_next ) {
1044                                                 Modification *mod = &ml->sml_mod;
1045                                                 const char *text;
1046                                                 char textbuf[SLAP_TEXT_BUFLEN];
1047                                                 size_t textlen = sizeof(textbuf);
1048                                                 int err;
1049
1050                                                 switch ( mod->sm_op ) {
1051                                                 case LDAP_MOD_ADD:
1052                                                         err = modify_add_values( target_entry_copy,
1053                                                                 mod, get_permissiveModify(op),
1054                                                                 &text, textbuf, textlen );
1055                                                         break;
1056
1057                                                 case LDAP_MOD_DELETE:
1058                                                         err = modify_delete_values( target_entry_copy,
1059                                                                 mod, get_permissiveModify(op),
1060                                                                 &text, textbuf, textlen );
1061                                                         break;
1062
1063                                                 case LDAP_MOD_REPLACE:
1064                                                         err = modify_replace_values( target_entry_copy,
1065                                                                 mod, get_permissiveModify(op),
1066                                                                 &text, textbuf, textlen );
1067                                                         break;
1068
1069                                                 case LDAP_MOD_INCREMENT:
1070                                                         err = modify_increment_values( target_entry_copy,
1071                                                                 mod, get_permissiveModify(op),
1072                                                                 &text, textbuf, textlen );
1073                                                         break;
1074
1075                                                 case SLAP_MOD_SOFTADD:
1076                                                         mod->sm_op = LDAP_MOD_ADD;
1077                                                         err = modify_add_values( target_entry_copy,
1078                                                                 mod, get_permissiveModify(op),
1079                                                                 &text, textbuf, textlen );
1080                                                         mod->sm_op = SLAP_MOD_SOFTADD;
1081                                                         if ( err == LDAP_TYPE_OR_VALUE_EXISTS ) {
1082                                                                 err = LDAP_SUCCESS;
1083                                                         }
1084                                                         break;
1085
1086                                                 case SLAP_MOD_SOFTDEL:
1087                                                         mod->sm_op = LDAP_MOD_ADD;
1088                                                         err = modify_delete_values( target_entry_copy,
1089                                                                 mod, get_permissiveModify(op),
1090                                                                 &text, textbuf, textlen );
1091                                                         mod->sm_op = SLAP_MOD_SOFTDEL;
1092                                                         if ( err == LDAP_NO_SUCH_ATTRIBUTE ) {
1093                                                                 err = LDAP_SUCCESS;
1094                                                         }
1095                                                         break;
1096
1097                                                 case SLAP_MOD_ADD_IF_NOT_PRESENT:
1098                                                         if ( attr_find( target_entry_copy->e_attrs, mod->sm_desc ) ) {
1099                                                                 err = LDAP_SUCCESS;
1100                                                                 break;
1101                                                         }
1102                                                         mod->sm_op = LDAP_MOD_ADD;
1103                                                         err = modify_add_values( target_entry_copy,
1104                                                                 mod, get_permissiveModify(op),
1105                                                                 &text, textbuf, textlen );
1106                                                         mod->sm_op = SLAP_MOD_ADD_IF_NOT_PRESENT;
1107                                                         break;
1108
1109                                                 default:
1110                                                         err = LDAP_OTHER;
1111                                                         break;
1112                                                 }
1113
1114                                                 if ( err != LDAP_SUCCESS ) {
1115                                                         rc = err;
1116                                                         goto mod_violation;
1117                                                 }
1118                                         }
1119                                 }
1120
1121                                 if ( acl_match_set(&cp->val, op, target_entry_copy, NULL) == 0) {
1122                                         rc = LDAP_CONSTRAINT_VIOLATION;
1123                                         goto mod_violation;
1124                                 }
1125                         }
1126                 }
1127         }
1128
1129         if (target_entry) {
1130                 op->o_bd = on->on_info->oi_origdb;
1131                 be_entry_release_r(op, target_entry);
1132                 op->o_bd = be;
1133         }
1134
1135         if (target_entry_copy) {
1136                 entry_free(target_entry_copy);
1137         }
1138
1139         return SLAP_CB_CONTINUE;
1140
1141 mod_violation:
1142         /* violation */
1143         if (target_entry) {
1144                 op->o_bd = on->on_info->oi_origdb;
1145                 be_entry_release_r(op, target_entry);
1146                 op->o_bd = be;
1147         }
1148
1149         if (target_entry_copy) {
1150                 entry_free(target_entry_copy);
1151         }
1152
1153         op->o_bd->bd_info = (BackendInfo *)(on->on_info);
1154         if ( rc == LDAP_CONSTRAINT_VIOLATION ) {
1155                 msg = print_message( &rsv, m->sml_desc );
1156         }
1157         send_ldap_error( op, rs, LDAP_CONSTRAINT_VIOLATION, msg );
1158         ch_free(msg);
1159         return (rs->sr_err);
1160 }
1161
1162 static int
1163 constraint_close(
1164         BackendDB *be,
1165         ConfigReply *cr )
1166 {
1167         slap_overinst *on = (slap_overinst *) be->bd_info;
1168         constraint *ap, *a2;
1169
1170         for ( ap = on->on_bi.bi_private; ap; ap = a2 ) {
1171                 a2 = ap->ap_next;
1172                 constraint_free( ap, 1 );
1173         }
1174
1175         return 0;
1176 }
1177
1178 static slap_overinst constraint_ovl;
1179
1180 #if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
1181 static
1182 #endif
1183 int
1184 constraint_initialize( void ) {
1185         int rc;
1186
1187         constraint_ovl.on_bi.bi_type = "constraint";
1188         constraint_ovl.on_bi.bi_db_close = constraint_close;
1189         constraint_ovl.on_bi.bi_op_add = constraint_add;
1190         constraint_ovl.on_bi.bi_op_modify = constraint_update;
1191         constraint_ovl.on_bi.bi_op_modrdn = constraint_update;
1192
1193         constraint_ovl.on_bi.bi_private = NULL;
1194
1195         constraint_ovl.on_bi.bi_cf_ocs = constraintocs;
1196         rc = config_register_schema( constraintcfg, constraintocs );
1197         if (rc) return rc;
1198
1199         return overlay_register( &constraint_ovl );
1200 }
1201
1202 #if SLAPD_OVER_CONSTRAINT == SLAPD_MOD_DYNAMIC
1203 int init_module(int argc, char *argv[]) {
1204         return constraint_initialize();
1205 }
1206 #endif
1207
1208 #endif /* defined(SLAPD_OVER_CONSTRAINT) */
1209