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

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 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 #undef ldap_debug       /* silence a warning in ldap-int.h */
  49 #include "../../../libraries/libldap/ldap-int.h"
  50
  51 static int ldap_send_entry( Backend *be, Operation *op, Connection *conn,
  52                              LDAPMessage *e, AttributeName *attrs, int attrsonly );
  53
  54 int
  55 ldap_back_search(
  56     Backend     *be,
  57     Connection  *conn,
  58     Operation   *op,
  59     struct berval       *base,
  60     struct berval       *nbase,
  61     int         scope,
  62     int         deref,
  63     int         slimit,
  64     int         tlimit,
  65     Filter      *filter,
  66     struct berval       *filterstr,
  67     AttributeName       *attrs,
  68     int         attrsonly
  69 )
  70 {
  71         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  72         struct ldapconn *lc;
  73         struct timeval  tv;
  74         LDAPMessage             *res, *e;
  75         int     count, rc = 0, msgid, sres = LDAP_SUCCESS;
  76         char *match = NULL, *err = NULL;
  77         char **mapped_attrs = NULL;
  78         struct berval mbase;
  79 #ifdef ENABLE_REWRITE
  80         char *mmatch = NULL;
  81 #endif /* ENABLE_REWRITE */
  82         struct berval mfilter = { 0, NULL };
  83         struct slap_limits_set *limit = NULL;
  84         int isroot = 0;
  85         BerVarray v2refs = NULL;
  86
  87         lc = ldap_back_getconn(li, conn, op);
  88         if ( !lc ) {
  89                 return( -1 );
  90         }
  91
  92         /*
  93          * FIXME: in case of values return filter, we might want
  94          * to map attrs and maybe rewrite value
  95          */
  96         if ( !ldap_back_dobind( li, lc, conn, op ) ) {
  97                 return( -1 );
  98         }
  99
 100         /* if not root, get appropriate limits */
 101         if ( be_isroot( be, &op->o_ndn ) ) {
 102                 isroot = 1;
 103         } else {
 104                 ( void ) get_limits( be, &op->o_ndn, &limit );
 105         }
 106
 107         /* if no time limit requested, rely on remote server limits */
 108         /* if requested limit higher than hard limit, abort */
 109         if ( !isroot && tlimit > limit->lms_t_hard ) {
 110                 /* no hard limit means use soft instead */
 111                 if ( limit->lms_t_hard == 0
 112                                 && limit->lms_t_soft > -1
 113                                 && tlimit > limit->lms_t_soft ) {
 114                         tlimit = limit->lms_t_soft;
 115
 116                 /* positive hard limit means abort */
 117                 } else if ( limit->lms_t_hard > 0 ) {
 118                         send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED,
 119                                         NULL, NULL, NULL, NULL );
 120                         rc = 0;
 121                         goto finish;
 122                 }
 123
 124                 /* negative hard limit means no limit */
 125         }
 126
 127         /* if no size limit requested, rely on remote server limits */
 128         /* if requested limit higher than hard limit, abort */
 129         if ( !isroot && slimit > limit->lms_s_hard ) {
 130                 /* no hard limit means use soft instead */
 131                 if ( limit->lms_s_hard == 0
 132                                 && limit->lms_s_soft > -1
 133                                 && slimit > limit->lms_s_soft ) {
 134                         slimit = limit->lms_s_soft;
 135
 136                 /* positive hard limit means abort */
 137                 } else if ( limit->lms_s_hard > 0 ) {
 138                         send_ldap_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED,
 139                                         NULL, NULL, NULL, NULL );
 140                         rc = 0;
 141                         goto finish;
 142                 }
 143
 144                 /* negative hard limit means no limit */
 145         }
 146
 147         /* should we check return values? */
 148         if (deref != -1)
 149                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
 150         if (tlimit != -1) {
 151                 tv.tv_sec = tlimit;
 152                 tv.tv_usec = 0;
 153         } else {
 154                 tv.tv_sec = 0;
 155         }
 156
 157         /*
 158          * Rewrite the search base, if required
 159          */
 160 #ifdef ENABLE_REWRITE
 161         switch ( rewrite_session( li->rwinfo, "searchBase",
 162                                 base->bv_val, conn, &mbase.bv_val ) ) {
 163         case REWRITE_REGEXEC_OK:
 164                 if ( mbase.bv_val == NULL ) {
 165                         mbase = *base;
 166                 }
 167 #ifdef NEW_LOGGING
 168                 LDAP_LOG( BACK_LDAP, DETAIL1,
 169                         "[rw] searchBase: \"%s\" -> \"%s\"\n",
 170                         base->bv_val, mbase.bv_val, 0 );
 171 #else /* !NEW_LOGGING */
 172                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 173                                 base->bv_val, mbase.bv_val, "" );
 174 #endif /* !NEW_LOGGING */
 175                 break;
 176
 177         case REWRITE_REGEXEC_UNWILLING:
 178                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 179                                 NULL, "Operation not allowed", NULL, NULL );
 180                 rc = -1;
 181                 goto finish;
 182
 183         case REWRITE_REGEXEC_ERR:
 184                 send_ldap_result( conn, op, LDAP_OTHER,
 185                                 NULL, "Rewrite error", NULL, NULL );
 186                 rc = -1;
 187                 goto finish;
 188         }
 189
 190 #else /* !ENABLE_REWRITE */
 191         ldap_back_dn_massage( li, base, &mbase, 0, 1 );
 192 #endif /* !ENABLE_REWRITE */
 193
 194 #ifdef ENABLE_REWRITE
 195         rc = ldap_back_filter_map_rewrite_( li->rwinfo, conn,
 196                         &li->at_map, &li->oc_map, filter, &mfilter,
 197                         BACKLDAP_MAP );
 198 #else /* ! ENABLE_REWRITE */
 199         rc = ldap_back_filter_map_rewrite_( &li->at_map, &li->oc_map,
 200                         filter, &mfilter, BACKLDAP_MAP );
 201 #endif /* ! ENABLE_REWRITE */
 202
 203         if ( rc ) {
 204                 rc = -1;
 205                 goto finish;
 206         }
 207
 208         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, BACKLDAP_MAP);
 209         if ( mapped_attrs == NULL && attrs) {
 210                 for (count=0; attrs[count].an_name.bv_val; count++);
 211                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 212                 for (count=0; attrs[count].an_name.bv_val; count++) {
 213                         mapped_attrs[count] = attrs[count].an_name.bv_val;
 214                 }
 215                 mapped_attrs[count] = NULL;
 216         }
 217
 218         rc = ldap_search_ext(lc->ld, mbase.bv_val, scope, mfilter.bv_val,
 219                         mapped_attrs, attrsonly, op->o_ctrls, NULL, tv.tv_sec ? &tv
 220                         : NULL, slimit, &msgid);
 221         if ( rc != LDAP_SUCCESS ) {
 222 fail:;
 223                 rc = ldap_back_op_result(li, lc, conn, op, msgid, rc, 0);
 224                 goto finish;
 225         }
 226
 227         /* We pull apart the ber result, stuff it into a slapd entry, and
 228          * let send_search_entry stuff it back into ber format. Slow & ugly,
 229          * but this is necessary for version matching, and for ACL processing.
 230          */
 231
 232         for (   count=0, rc=0;
 233                         rc != -1;
 234                         rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 235         {
 236                 /* check for abandon */
 237                 if (op->o_abandon) {
 238                         ldap_abandon(lc->ld, msgid);
 239                         rc = 0;
 240                         goto finish;
 241                 }
 242
 243                 if (rc == 0) {
 244                         tv.tv_sec = 0;
 245                         tv.tv_usec = 100000;
 246                         ldap_pvt_thread_yield();
 247
 248                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 249                         e = ldap_first_entry(lc->ld,res);
 250                         if ( ldap_send_entry(be, op, conn, e, attrs, attrsonly)
 251                                         == LDAP_SUCCESS ) {
 252                                 count++;
 253                         }
 254                         ldap_msgfree(res);
 255
 256                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 257                         char            **references = NULL;
 258                         LDAPControl     **ctrls = NULL;
 259                         BerVarray       refs;
 260                         int             cnt;
 261
 262                         rc = ldap_parse_reference( lc->ld, res,
 263                                         &references, &ctrls, 1 );
 264
 265                         if ( rc != LDAP_SUCCESS ) {
 266                                 continue;
 267                         }
 268
 269                         if ( references == NULL ) {
 270                                 continue;
 271                         }
 272
 273                         for ( cnt = 0; references[ cnt ]; cnt++ )
 274                                 /* NO OP */ ;
 275
 276                         refs = ch_calloc( cnt + 1, sizeof( struct berval ) );
 277
 278                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 279                                 refs[ cnt ].bv_val = references[ cnt ];
 280                                 refs[ cnt ].bv_len = strlen( references[ cnt ] );
 281                         }
 282
 283                         /* ignore return value by now */
 284                         ( void )send_search_reference( be, conn, op,
 285                                         NULL, refs, ctrls, &v2refs );
 286
 287                         /* cleanup */
 288                         if ( references ) {
 289                                 ldap_value_free( references );
 290                                 ch_free( refs );
 291                         }
 292
 293                         if ( ctrls ) {
 294                                 ldap_controls_free( ctrls );
 295                         }
 296
 297                 } else {
 298                         rc = ldap_parse_result(lc->ld, res, &sres, &match,
 299                                 &err, NULL, NULL, 1);
 300                         if (rc != LDAP_SUCCESS ) sres = rc;
 301                         sres = ldap_back_map_result(sres);
 302                         rc = 0;
 303                         break;
 304                 }
 305         }
 306
 307         if (rc == -1)
 308                 goto fail;
 309
 310 #ifdef ENABLE_REWRITE
 311         /*
 312          * Rewrite the matched portion of the search base, if required
 313          */
 314         if ( match != NULL ) {
 315                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 316                                 match, conn, &mmatch ) ) {
 317                 case REWRITE_REGEXEC_OK:
 318                         if ( mmatch == NULL ) {
 319                                 mmatch = ( char * )match;
 320                         }
 321 #ifdef NEW_LOGGING
 322                         LDAP_LOG( BACK_LDAP, DETAIL1,
 323                                 "[rw]  matchedDn:" " \"%s\" -> \"%s\"\n", match, mmatch, 0 );
 324 #else /* !NEW_LOGGING */
 325                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 326                                         " \"%s\" -> \"%s\"\n%s",
 327                                         match, mmatch, "" );
 328 #endif /* !NEW_LOGGING */
 329                         break;
 330
 331                 case REWRITE_REGEXEC_UNWILLING:
 332
 333                 case REWRITE_REGEXEC_ERR:
 334                         /* FIXME: no error, but no matched ... */
 335                         mmatch = NULL;
 336                         break;
 337                 }
 338         }
 339
 340         if ( v2refs ) {
 341                 sres = LDAP_REFERRAL;
 342         }
 343
 344         send_search_result( conn, op, sres,
 345                 mmatch, err, v2refs, NULL, count );
 346
 347 #else /* !ENABLE_REWRITE */
 348         if ( v2refs ) {
 349                 sres = LDAP_REFERRAL;
 350         }
 351         send_search_result( conn, op, sres,
 352                 match, err, v2refs, NULL, count );
 353 #endif /* !ENABLE_REWRITE */
 354
 355 finish:;
 356         if ( match ) {
 357 #ifdef ENABLE_REWRITE
 358                 if ( mmatch != match ) {
 359                         free( mmatch );
 360                 }
 361 #endif /* ENABLE_REWRITE */
 362                 LDAP_FREE(match);
 363         }
 364         if ( err ) {
 365                 LDAP_FREE( err );
 366         }
 367         if ( mapped_attrs ) {
 368                 ch_free( mapped_attrs );
 369         }
 370         if ( mfilter.bv_val != filterstr->bv_val ) {
 371                 ch_free( mfilter.bv_val );
 372         }
 373         if ( mbase.bv_val != base->bv_val ) {
 374                 free( mbase.bv_val );
 375         }
 376
 377         return rc;
 378 }
 379
 380 static int
 381 ldap_send_entry(
 382         Backend *be,
 383         Operation *op,
 384         Connection *conn,
 385         LDAPMessage *e,
 386         AttributeName *attrs,
 387         int attrsonly
 388 )
 389 {
 390         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 391         struct berval a, mapped;
 392         Entry ent;
 393         BerElement ber = *e->lm_ber;
 394         Attribute *attr, **attrp;
 395         struct berval dummy = { 0, NULL };
 396         struct berval *bv, bdn;
 397         const char *text;
 398
 399         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
 400                 return LDAP_DECODING_ERROR;
 401         }
 402 #ifdef ENABLE_REWRITE
 403
 404         /*
 405          * Rewrite the dn of the result, if needed
 406          */
 407         switch ( rewrite_session( li->rwinfo, "searchResult",
 408                                 bdn.bv_val, conn, &ent.e_name.bv_val ) ) {
 409         case REWRITE_REGEXEC_OK:
 410                 if ( ent.e_name.bv_val == NULL ) {
 411                         ent.e_name = bdn;
 412                 } else {
 413 #ifdef NEW_LOGGING
 414                         LDAP_LOG( BACK_LDAP, DETAIL1,
 415                                 "[rw] searchResult: \"%s\"" " -> \"%s\"\n",
 416                                 bdn.bv_val, ent.e_dn, 0 );
 417 #else /* !NEW_LOGGING */
 418                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 419                                         " -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" );
 420 #endif /* !NEW_LOGGING */
 421                         ent.e_name.bv_len = strlen( ent.e_name.bv_val );
 422                 }
 423                 break;
 424
 425         case REWRITE_REGEXEC_ERR:
 426         case REWRITE_REGEXEC_UNWILLING:
 427                 return LDAP_OTHER;
 428         }
 429 #else /* !ENABLE_REWRITE */
 430         ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
 431 #endif /* !ENABLE_REWRITE */
 432
 433         /*
 434          * Note: this may fail if the target host(s) schema differs
 435          * from the one known to the meta, and a DN with unknown
 436          * attributes is returned.
 437          *
 438          * FIXME: should we log anything, or delegate to dnNormalize2?
 439          */
 440         if ( dnNormalize2( NULL, &ent.e_name, &ent.e_nname ) != LDAP_SUCCESS ) {
 441                 return LDAP_INVALID_DN_SYNTAX;
 442         }
 443
 444         ent.e_id = 0;
 445         ent.e_attrs = 0;
 446         ent.e_private = 0;
 447         attrp = &ent.e_attrs;
 448
 449         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 450                 ldap_back_map(&li->at_map, &a, &mapped, BACKLDAP_REMAP);
 451                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 452                         continue;
 453                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 454                 if (attr == NULL)
 455                         continue;
 456                 attr->a_flags = 0;
 457                 attr->a_next = 0;
 458                 attr->a_desc = NULL;
 459                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 460                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 461                                         != LDAP_SUCCESS) {
 462 #ifdef NEW_LOGGING
 463                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 464                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 465 #else /* !NEW_LOGGING */
 466                                 Debug( LDAP_DEBUG_ANY,
 467                                                 "slap_bv2undef_ad(%s):  "
 468                                                 "%s\n%s", mapped.bv_val, text, "" );
 469 #endif /* !NEW_LOGGING */
 470                                 ch_free(attr);
 471                                 continue;
 472                         }
 473                 }
 474
 475                 /* no subschemaSubentry */
 476                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 477                         ch_free(attr);
 478                         continue;
 479                 }
 480
 481                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 482                                 || attr->a_vals == NULL ) {
 483                         /*
 484                          * Note: attr->a_vals can be null when using
 485                          * values result filter
 486                          */
 487                         attr->a_vals = &dummy;
 488
 489                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 490                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 491                         int             last;
 492
 493                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 494
 495                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 496                                 ldap_back_map(&li->oc_map, bv, &mapped,
 497                                                 BACKLDAP_REMAP);
 498                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 499                                         LBER_FREE(bv->bv_val);
 500                                         bv->bv_val = NULL;
 501                                         if (--last < 0)
 502                                                 break;
 503                                         *bv = attr->a_vals[last];
 504                                         attr->a_vals[last].bv_val = NULL;
 505                                         bv--;
 506
 507                                 } else if ( mapped.bv_val != bv->bv_val ) {
 508                                         /*
 509                                          * FIXME: after LBER_FREEing
 510                                          * the value is replaced by
 511                                          * ch_alloc'ed memory
 512                                          */
 513                                         LBER_FREE(bv->bv_val);
 514                                         ber_dupbv( bv, &mapped );
 515                                 }
 516                         }
 517
 518                 /*
 519                  * It is necessary to try to rewrite attributes with
 520                  * dn syntax because they might be used in ACLs as
 521                  * members of groups; since ACLs are applied to the
 522                  * rewritten stuff, no dn-based subject clause could
 523                  * be used at the ldap backend side (see
 524                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 525                  * The problem can be overcome by moving the dn-based
 526                  * ACLs to the target directory server, and letting
 527                  * everything pass thru the ldap backend.
 528                  */
 529                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 530                                         SLAPD_DN_SYNTAX ) == 0 ) {
 531                         int             last;
 532
 533                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 534
 535                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 536                                 struct berval   newval;
 537
 538 #ifdef ENABLE_REWRITE
 539                                 switch ( rewrite_session( li->rwinfo,
 540                                                         "searchResult",
 541                                                         bv->bv_val,
 542                                                         conn,
 543                                                         &newval.bv_val )) {
 544                                 case REWRITE_REGEXEC_OK:
 545                                         /* left as is */
 546                                         if ( newval.bv_val == NULL ) {
 547                                                 break;
 548                                         }
 549                                         newval.bv_len = strlen( newval.bv_val );
 550 #ifdef NEW_LOGGING
 551                                         LDAP_LOG( BACK_LDAP, DETAIL1,
 552                                                 "[rw] searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 553                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 554                                                 bv->bv_val, newval.bv_val );
 555 #else /* !NEW_LOGGING */
 556                                         Debug( LDAP_DEBUG_ARGS,
 557                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 558                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 559                                                 bv->bv_val, newval.bv_val );
 560 #endif /* !NEW_LOGGING */
 561                                         free( bv->bv_val );
 562                                         *bv = newval;
 563                                         break;
 564
 565                                 case REWRITE_REGEXEC_UNWILLING:
 566                                         LBER_FREE(bv->bv_val);
 567                                         bv->bv_val = NULL;
 568                                         if (--last < 0)
 569                                                 goto next_attr;
 570                                         *bv = attr->a_vals[last];
 571                                         attr->a_vals[last].bv_val = NULL;
 572                                         bv--;
 573                                         break;
 574
 575                                 case REWRITE_REGEXEC_ERR:
 576                                         /*
 577                                          * FIXME: better give up,
 578                                          * skip the attribute
 579                                          * or leave it untouched?
 580                                          */
 581                                         break;
 582                                 }
 583 #else /* !ENABLE_REWRITE */
 584                                 ldap_back_dn_massage( li, bv, &newval, 0, 0 );
 585                                 *bv = newval;
 586 #endif /* !ENABLE_REWRITE */
 587                         }
 588                 }
 589
 590 next_attr:;
 591
 592                 *attrp = attr;
 593                 attrp = &attr->a_next;
 594         }
 595         send_search_entry( be, conn, op, &ent, attrs, attrsonly, NULL );
 596         while (ent.e_attrs) {
 597                 attr = ent.e_attrs;
 598                 ent.e_attrs = attr->a_next;
 599                 if (attr->a_vals != &dummy)
 600                         ber_bvarray_free(attr->a_vals);
 601                 ch_free(attr);
 602         }
 603
 604         if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 605                 free( ent.e_dn );
 606         if ( ent.e_ndn )
 607                 free( ent.e_ndn );
 608
 609         return LDAP_SUCCESS;
 610 }