git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/search.c

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7 /* This is an altered version */
   8 /*
   9  * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
  10  *
  11  * Permission is granted to anyone to use this software for any purpose
  12  * on any computer system, and to alter it and redistribute it, subject
  13  * to the following restrictions:
  14  *
  15  * 1. The author is not responsible for the consequences of use of this
  16  *    software, no matter how awful, even if they arise from flaws in it.
  17  *
  18  * 2. The origin of this software must not be misrepresented, either by
  19  *    explicit claim or by omission.  Since few users ever read sources,
  20  *    credits should appear in the documentation.
  21  *
  22  * 3. Altered versions must be plainly marked as such, and must not be
  23  *    misrepresented as being the original software.  Since few users
  24  *    ever read sources, credits should appear in the documentation.
  25  *
  26  * 4. This notice may not be removed or altered.
  27  *
  28  *
  29  *
  30  * Copyright 2000, Pierangelo Masarati, All rights reserved. <ando@sys-net.it>
  31  *
  32  * This software is being modified by Pierangelo Masarati.
  33  * The previously reported conditions apply to the modified code as well.
  34  * Changes in the original code are highlighted where required.
  35  * Credits for the original code go to the author, Howard Chu.
  36  */
  37
  38 #include "portable.h"
  39
  40 #include <stdio.h>
  41
  42 #include <ac/socket.h>
  43 #include <ac/string.h>
  44 #include <ac/time.h>
  45
  46 #include "slap.h"
  47 #include "back-ldap.h"
  48
  49 static void ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc,
  50                              LDAPMessage *e, struct berval **attrs, int attrsonly );
  51
  52 int
  53 ldap_back_search(
  54     Backend     *be,
  55     Connection  *conn,
  56     Operation   *op,
  57     struct berval       *base,
  58     struct berval       *nbase,
  59     int         scope,
  60     int         deref,
  61     int         slimit,
  62     int         tlimit,
  63     Filter      *filter,
  64     const char  *filterstr,
  65     struct berval       **attrs,
  66     int         attrsonly
  67 )
  68 {
  69         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  70         struct ldapconn *lc;
  71         struct timeval  tv;
  72         LDAPMessage             *res, *e;
  73         int     count, rc = 0, msgid, sres = LDAP_SUCCESS;
  74         char *match = NULL, *err = NULL;
  75         char *mapped_filter = NULL, **mapped_attrs = NULL;
  76         struct berval mbase;
  77 #ifdef ENABLE_REWRITE
  78         char *mfilter = NULL, *mmatch = NULL;
  79 #endif /* ENABLE_REWRITE */
  80         struct slap_limits_set *limit = NULL;
  81         int isroot = 0;
  82
  83         lc = ldap_back_getconn(li, conn, op);
  84         if ( !lc ) {
  85                 return( -1 );
  86         }
  87
  88         /* if not root, get appropriate limits */
  89         if ( be_isroot( be, &op->o_ndn ) ) {
  90                 isroot = 1;
  91         } else {
  92                 ( void ) get_limits( be, &op->o_ndn, &limit );
  93         }
  94
  95         /* if no time limit requested, rely on remote server limits */
  96         /* if requested limit higher than hard limit, abort */
  97         if ( !isroot && tlimit > limit->lms_t_hard ) {
  98                 /* no hard limit means use soft instead */
  99                 if ( limit->lms_t_hard == 0 ) {
 100                         tlimit = limit->lms_t_soft;
 101
 102                 /* positive hard limit means abort */
 103                 } else if ( limit->lms_t_hard > 0 ) {
 104                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 105                                         NULL, NULL, NULL, NULL, 0 );
 106                         rc = 0;
 107                         goto finish;
 108                 }
 109
 110                 /* negative hard limit means no limit */
 111         }
 112
 113         /* if no size limit requested, rely on remote server limits */
 114         /* if requested limit higher than hard limit, abort */
 115         if ( !isroot && slimit > limit->lms_s_hard ) {
 116                 /* no hard limit means use soft instead */
 117                 if ( limit->lms_s_hard == 0 ) {
 118                         slimit = limit->lms_s_soft;
 119
 120                 /* positive hard limit means abort */
 121                 } else if ( limit->lms_s_hard > 0 ) {
 122                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 123                                         NULL, NULL, NULL, NULL, 0 );
 124                         rc = 0;
 125                         goto finish;
 126                 }
 127
 128                 /* negative hard limit means no limit */
 129         }
 130
 131         if (deref != -1)
 132                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
 133         if (tlimit != -1)
 134                 ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit);
 135         if (slimit != -1)
 136                 ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit);
 137
 138         if ( !ldap_back_dobind( lc, op ) ) {
 139                 return( -1 );
 140         }
 141
 142         /*
 143          * Rewrite the search base, if required
 144          */
 145 #ifdef ENABLE_REWRITE
 146         switch ( rewrite_session( li->rwinfo, "searchBase",
 147                                 base->bv_val, conn, &mbase.bv_val ) ) {
 148         case REWRITE_REGEXEC_OK:
 149                 if ( mbase.bv_val == NULL ) {
 150                         mbase.bv_val = ( char * )base->bv_val;
 151                 }
 152 #ifdef NEW_LOGGING
 153                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 154                                 "[rw] searchBase: \"%s\" -> \"%s\"\n%",
 155                                 base->bv_val, mbase.bv_val ));
 156 #else /* !NEW_LOGGING */
 157                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 158                                 base->bv_val, mbase.bv_val, "" );
 159 #endif /* !NEW_LOGGING */
 160                 break;
 161
 162         case REWRITE_REGEXEC_UNWILLING:
 163                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 164                                 NULL, "Unwilling to perform", NULL, NULL );
 165                 rc = -1;
 166                 goto finish;
 167
 168         case REWRITE_REGEXEC_ERR:
 169                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 170                                 NULL, "Operations error", NULL, NULL );
 171                 rc = -1;
 172                 goto finish;
 173         }
 174
 175         /*
 176          * Rewrite the search filter, if required
 177          */
 178         switch ( rewrite_session( li->rwinfo, "searchFilter",
 179                                 filterstr, conn, &mfilter ) ) {
 180         case REWRITE_REGEXEC_OK:
 181                 if ( mfilter == NULL || mfilter[0] == '\0') {
 182                         if ( mfilter != NULL ) {
 183                                 free( mfilter );
 184                         }
 185                         mfilter = ( char * )filterstr;
 186                 }
 187 #ifdef NEW_LOGGING
 188                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 189                                 "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 190                                 filterstr, mfilter ));
 191 #else /* !NEW_LOGGING */
 192                 Debug( LDAP_DEBUG_ARGS,
 193                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 194                                 filterstr, mfilter, "" );
 195 #endif /* !NEW_LOGGING */
 196                 break;
 197
 198         case REWRITE_REGEXEC_UNWILLING:
 199                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 200                                 NULL, "Unwilling to perform", NULL, NULL );
 201         case REWRITE_REGEXEC_ERR:
 202                 rc = -1;
 203                 goto finish;
 204         }
 205 #else /* !ENABLE_REWRITE */
 206         ldap_back_dn_massage( li, base, &mbase, 0, 1 );
 207 #endif /* !ENABLE_REWRITE */
 208
 209         mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
 210 #ifdef ENABLE_REWRITE
 211                         (char *)mfilter,
 212 #else /* !ENABLE_REWRITE */
 213                         (char *)filterstr,
 214 #endif /* !ENABLE_REWRITE */
 215                         0);
 216         if ( mapped_filter == NULL ) {
 217 #ifdef ENABLE_REWRITE
 218                 mapped_filter = (char *)mfilter;
 219 #else /* !ENABLE_REWRITE */
 220                 mapped_filter = (char *)filterstr;
 221 #endif /* !ENABLE_REWRITE */
 222         }
 223
 224         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0);
 225         if ( mapped_attrs == NULL && attrs) {
 226                 for (count=0; attrs[count]; count++);
 227                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 228                 for (count=0; attrs[count]; count++) {
 229                         mapped_attrs[count] = attrs[count]->bv_val;
 230                 }
 231                 mapped_attrs[count] = NULL;
 232         }
 233
 234         if ((msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs,
 235                 attrsonly)) == -1)
 236         {
 237 fail:;
 238                 rc = ldap_back_op_result(lc, op);
 239                 goto finish;
 240         }
 241
 242         /* We pull apart the ber result, stuff it into a slapd entry, and
 243          * let send_search_entry stuff it back into ber format. Slow & ugly,
 244          * but this is necessary for version matching, and for ACL processing.
 245          */
 246
 247         for (   count=0, rc=0;
 248                         rc != -1;
 249                         rc = ldap_result(lc->ld, LDAP_RES_ANY, 0, &tv, &res))
 250         {
 251                 int ab;
 252
 253                 /* check for abandon */
 254                 ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 255                 ab = op->o_abandon;
 256                 ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 257
 258                 if (ab) {
 259                         ldap_abandon(lc->ld, msgid);
 260                         rc = 0;
 261                         goto finish;
 262                 }
 263                 if (rc == 0) {
 264                         tv.tv_sec = 0;
 265                         tv.tv_usec = 100000;
 266                         ldap_pvt_thread_yield();
 267                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 268                         e = ldap_first_entry(lc->ld,res);
 269                         ldap_send_entry(be, op, lc, e, attrs, attrsonly);
 270                         count++;
 271                         ldap_msgfree(res);
 272                 } else {
 273                         sres = ldap_result2error(lc->ld, res, 1);
 274                         sres = ldap_back_map_result(sres);
 275                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
 276                         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 277                         rc = 0;
 278                         break;
 279                 }
 280         }
 281
 282         if (rc == -1)
 283                 goto fail;
 284
 285 #ifdef ENABLE_REWRITE
 286         /*
 287          * Rewrite the matched portion of the search base, if required
 288          */
 289         if ( match != NULL ) {
 290                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 291                                 match, conn, &mmatch ) ) {
 292                 case REWRITE_REGEXEC_OK:
 293                         if ( mmatch == NULL ) {
 294                                 mmatch = ( char * )match;
 295                         }
 296 #ifdef NEW_LOGGING
 297                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 298                                         "[rw]  matchedDn:"
 299                                         " \"%s\" -> \"%s\"\n",
 300                                         match, mmatch ));
 301 #else /* !NEW_LOGGING */
 302                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 303                                         " \"%s\" -> \"%s\"\n%s",
 304                                         match, mmatch, "" );
 305 #endif /* !NEW_LOGGING */
 306                         break;
 307
 308                 case REWRITE_REGEXEC_UNWILLING:
 309                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 310                                         NULL, "Unwilling to perform",
 311                                         NULL, NULL );
 312
 313                 case REWRITE_REGEXEC_ERR:
 314                         rc = -1;
 315                         goto finish;
 316                 }
 317         }
 318
 319         send_search_result( conn, op, sres,
 320                 mmatch, err, NULL, NULL, count );
 321
 322 #else /* !ENABLE_REWRITE */
 323         send_search_result( conn, op, sres,
 324                 match, err, NULL, NULL, count );
 325 #endif /* !ENABLE_REWRITE */
 326
 327 finish:;
 328         if ( match ) {
 329 #ifdef ENABLE_REWRITE
 330                 if ( mmatch != match ) {
 331                         free( mmatch );
 332                 }
 333 #endif /* ENABLE_REWRITE */
 334                 free(match);
 335         }
 336         if ( err ) {
 337                 free( err );
 338         }
 339         if ( mapped_attrs ) {
 340                 free( mapped_attrs );
 341         }
 342 #ifdef ENABLE_REWRITE
 343         if ( mapped_filter != mfilter ) {
 344                 free( mapped_filter );
 345         }
 346         if ( mfilter != filterstr ) {
 347                 free( mfilter );
 348         }
 349 #else /* !ENABLE_REWRITE */
 350         if ( mapped_filter != filterstr ) {
 351                 free( mapped_filter );
 352         }
 353 #endif /* !ENABLE_REWRITE */
 354
 355         if ( mbase.bv_val != base->bv_val ) {
 356                 free( mbase.bv_val );
 357         }
 358
 359         return rc;
 360 }
 361
 362 static void
 363 ldap_send_entry(
 364         Backend *be,
 365         Operation *op,
 366         struct ldapconn *lc,
 367         LDAPMessage *e,
 368         struct berval **attrs,
 369         int attrsonly
 370 )
 371 {
 372         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 373         char *a, *mapped;
 374         Entry ent;
 375         BerElement *ber = NULL;
 376         Attribute *attr, **attrp;
 377         struct berval *dummy = NULL;
 378         struct berval *bv, bdn;
 379         const char *text;
 380
 381 #ifdef ENABLE_REWRITE
 382         char *dn;
 383
 384         dn = ldap_get_dn(lc->ld, e);
 385         if ( dn == NULL ) {
 386                 return;
 387         }
 388
 389         /*
 390          * Rewrite the dn of the result, if needed
 391          */
 392         switch ( rewrite_session( li->rwinfo, "searchResult",
 393                                 dn, lc->conn, &ent.e_dn ) ) {
 394         case REWRITE_REGEXEC_OK:
 395                 if ( ent.e_dn == NULL ) {
 396                         ent.e_dn = dn;
 397                 } else {
 398 #ifdef NEW_LOGGING
 399                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 400                                         "[rw] searchResult: \"%s\""
 401                                         " -> \"%s\"\n", dn, ent.e_dn ));
 402 #else /* !NEW_LOGGING */
 403                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 404                                         " -> \"%s\"\n%s", dn, ent.e_dn, "" );
 405 #endif /* !NEW_LOGGING */
 406                         free( dn );
 407                         dn = NULL;
 408                 }
 409                 break;
 410
 411         case REWRITE_REGEXEC_ERR:
 412         case REWRITE_REGEXEC_UNWILLING:
 413                 free( dn );
 414                 return;
 415         }
 416 #else /* !ENABLE_REWRITE */
 417         ber_str2bv( ldap_get_dn(lc->ld, e), 0, 0, &bdn );
 418         ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
 419 #endif /* !ENABLE_REWRITE */
 420
 421         bv = NULL;
 422         dnNormalize( NULL, &ent.e_name, &bv );
 423         ent.e_nname = *bv;
 424         ent.e_id = 0;
 425         ent.e_attrs = 0;
 426         ent.e_private = 0;
 427         attrp = &ent.e_attrs;
 428
 429         for (   a = ldap_first_attribute(lc->ld, e, &ber);
 430                         a != NULL;
 431                         a = ldap_next_attribute(lc->ld, e, ber))
 432         {
 433                 mapped = ldap_back_map(&li->at_map, a, 1);
 434                 if (mapped == NULL)
 435                         continue;
 436                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 437                 if (attr == NULL)
 438                         continue;
 439                 attr->a_next = 0;
 440                 attr->a_desc = NULL;
 441                 if (slap_str2ad(mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 442                         if (slap_str2undef_ad(mapped, &attr->a_desc, &text)
 443                                         != LDAP_SUCCESS) {
 444 #ifdef NEW_LOGGING
 445                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 446                                                 "slap_str2undef_ad(%s): "
 447                                                 "%s\n", mapped, text ));
 448 #else /* !NEW_LOGGING */
 449                                 Debug( LDAP_DEBUG_ANY,
 450                                                 "slap_str2undef_ad(%s): "
 451                                                 "%s\n%s", mapped, text, "" );
 452 #endif /* !NEW_LOGGING */
 453
 454                                 ch_free(attr);
 455                                 continue;
 456                         }
 457                 }
 458                 attr->a_vals = ldap_get_values_len(lc->ld, e, a);
 459                 if (!attr->a_vals) {
 460                         attr->a_vals = &dummy;
 461                 } else if ( strcasecmp( mapped, "objectclass" ) == 0 ) {
 462                         int i, last;
 463                         for ( last = 0; attr->a_vals[last]; last++ ) ;
 464                         for ( i = 0; ( bv = attr->a_vals[i] ); i++ ) {
 465                                 mapped = ldap_back_map(&li->oc_map, bv->bv_val, 1);
 466                                 if (mapped == NULL) {
 467                                         ber_bvfree(attr->a_vals[i]);
 468                                         attr->a_vals[i] = NULL;
 469                                         if (--last < 0)
 470                                                 break;
 471                                         attr->a_vals[i] = attr->a_vals[last];
 472                                         attr->a_vals[last] = NULL;
 473                                         i--;
 474                                 } else if ( mapped != bv->bv_val ) {
 475                                         ch_free(bv->bv_val);
 476                                         ber_str2bv( mapped, 0, 1, bv );
 477                                 }
 478                         }
 479
 480 #ifdef ENABLE_REWRITE
 481                 /*
 482                  * It is necessary to try to rewrite attributes with
 483                  * dn syntax because they might be used in ACLs as
 484                  * members of groups; since ACLs are applied to the
 485                  * rewritten stuff, no dn-based subecj clause could
 486                  * be used at the ldap backend side (see
 487                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 488                  * The problem can be overcome by moving the dn-based
 489                  * ACLs to the target directory server, and letting
 490                  * everything pass thru the ldap backend.
 491                  */
 492                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 493                                         SLAPD_DN_SYNTAX ) == 0 ) {
 494                         int i;
 495                         for ( i = 0; ( bv = attr->a_vals[ i ] ); i++ ) {
 496                                 char *newval;
 497
 498                                 switch ( rewrite_session( li->rwinfo,
 499                                                         "searchResult",
 500                                                         bv->bv_val,
 501                                                         lc->conn, &newval )) {
 502                                 case REWRITE_REGEXEC_OK:
 503                                         /* left as is */
 504                                         if ( newval == NULL ) {
 505                                                 break;
 506                                         }
 507 #ifdef NEW_LOGGING
 508                                         LDAP_LOG(( "backend",
 509                                                         LDAP_LEVEL_DETAIL1,
 510                                                         "[rw] searchResult on"
 511                                                         " attr=%s:"
 512                                                         " \"%s\" -> \"%s\"\n",
 513                                                         attr->a_desc->ad_type->sat_cname.bv_val,
 514                                                         bv->bv_val, newval ));
 515 #else /* !NEW_LOGGING */
 516                                         Debug( LDAP_DEBUG_ARGS,
 517                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 518                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 519                                                 bv->bv_val, newval );
 520 #endif /* !NEW_LOGGING */
 521
 522                                         free( bv->bv_val );
 523                                         bv->bv_val = newval;
 524                                         bv->bv_len = strlen( newval );
 525
 526                                         break;
 527
 528                                 case REWRITE_REGEXEC_UNWILLING:
 529
 530                                 case REWRITE_REGEXEC_ERR:
 531                                         /*
 532                                          * FIXME: better give up,
 533                                          * skip the attribute
 534                                          * or leave it untouched?
 535                                          */
 536                                         break;
 537                                 }
 538                         }
 539 #endif /* ENABLE_REWRITE */
 540                 }
 541
 542                 *attrp = attr;
 543                 attrp = &attr->a_next;
 544         }
 545         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 546         while (ent.e_attrs) {
 547                 attr = ent.e_attrs;
 548                 ent.e_attrs = attr->a_next;
 549                 if (attr->a_vals != &dummy)
 550                         ber_bvecfree(attr->a_vals);
 551                 free(attr);
 552         }
 553         if (ber)
 554                 ber_free(ber,0);
 555
 556         if ( ent.e_dn )
 557                 free( ent.e_dn );
 558         if ( ent.e_ndn )
 559                 free( ent.e_ndn );
 560 }
 561