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

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 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 #include "../../../libraries/libldap/ldap-int.h"
  49
  50 static void ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc,
  51                              LDAPMessage *e, AttributeName *attrs, int attrsonly );
  52
  53 int
  54 ldap_back_search(
  55     Backend     *be,
  56     Connection  *conn,
  57     Operation   *op,
  58     struct berval       *base,
  59     struct berval       *nbase,
  60     int         scope,
  61     int         deref,
  62     int         slimit,
  63     int         tlimit,
  64     Filter      *filter,
  65     struct berval       *filterstr,
  66     AttributeName       *attrs,
  67     int         attrsonly
  68 )
  69 {
  70         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  71         struct ldapconn *lc;
  72         struct timeval  tv;
  73         LDAPMessage             *res, *e;
  74         int     count, rc = 0, msgid, sres = LDAP_SUCCESS;
  75         char *match = NULL, *err = NULL;
  76         char *mapped_filter = NULL, **mapped_attrs = NULL;
  77         struct berval mbase;
  78 #ifdef ENABLE_REWRITE
  79         char *mmatch = NULL;
  80         struct berval mfilter = { 0, NULL };
  81 #endif /* ENABLE_REWRITE */
  82         struct slap_limits_set *limit = NULL;
  83         int isroot = 0;
  84
  85         lc = ldap_back_getconn(li, conn, op);
  86         if ( !lc ) {
  87                 return( -1 );
  88         }
  89
  90         /* if not root, get appropriate limits */
  91         if ( be_isroot( be, &op->o_ndn ) ) {
  92                 isroot = 1;
  93         } else {
  94                 ( void ) get_limits( be, &op->o_ndn, &limit );
  95         }
  96
  97         /* if no time limit requested, rely on remote server limits */
  98         /* if requested limit higher than hard limit, abort */
  99         if ( !isroot && tlimit > limit->lms_t_hard ) {
 100                 /* no hard limit means use soft instead */
 101                 if ( limit->lms_t_hard == 0 ) {
 102                         tlimit = limit->lms_t_soft;
 103
 104                 /* positive hard limit means abort */
 105                 } else if ( limit->lms_t_hard > 0 ) {
 106                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 107                                         NULL, NULL, NULL, NULL, 0 );
 108                         rc = 0;
 109                         goto finish;
 110                 }
 111
 112                 /* negative hard limit means no limit */
 113         }
 114
 115         /* if no size limit requested, rely on remote server limits */
 116         /* if requested limit higher than hard limit, abort */
 117         if ( !isroot && slimit > limit->lms_s_hard ) {
 118                 /* no hard limit means use soft instead */
 119                 if ( limit->lms_s_hard == 0 ) {
 120                         slimit = limit->lms_s_soft;
 121
 122                 /* positive hard limit means abort */
 123                 } else if ( limit->lms_s_hard > 0 ) {
 124                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 125                                         NULL, NULL, NULL, NULL, 0 );
 126                         rc = 0;
 127                         goto finish;
 128                 }
 129
 130                 /* negative hard limit means no limit */
 131         }
 132
 133         if (deref != -1)
 134                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
 135         if (tlimit != -1)
 136                 ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit);
 137         if (slimit != -1)
 138                 ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit);
 139
 140         if ( !ldap_back_dobind( lc, op ) ) {
 141                 return( -1 );
 142         }
 143
 144         /*
 145          * Rewrite the search base, if required
 146          */
 147 #ifdef ENABLE_REWRITE
 148         switch ( rewrite_session( li->rwinfo, "searchBase",
 149                                 base->bv_val, conn, &mbase.bv_val ) ) {
 150         case REWRITE_REGEXEC_OK:
 151                 if ( mbase.bv_val == NULL ) {
 152                         mbase = *base;
 153                 }
 154 #ifdef NEW_LOGGING
 155                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 156                                 "[rw] searchBase: \"%s\" -> \"%s\"\n%",
 157                                 base->bv_val, mbase.bv_val ));
 158 #else /* !NEW_LOGGING */
 159                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 160                                 base->bv_val, mbase.bv_val, "" );
 161 #endif /* !NEW_LOGGING */
 162                 break;
 163
 164         case REWRITE_REGEXEC_UNWILLING:
 165                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 166                                 NULL, "Unwilling to perform", NULL, NULL );
 167                 rc = -1;
 168                 goto finish;
 169
 170         case REWRITE_REGEXEC_ERR:
 171                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 172                                 NULL, "Operations error", NULL, NULL );
 173                 rc = -1;
 174                 goto finish;
 175         }
 176
 177         /*
 178          * Rewrite the search filter, if required
 179          */
 180         switch ( rewrite_session( li->rwinfo, "searchFilter",
 181                                 filterstr->bv_val, conn, &mfilter.bv_val ) ) {
 182         case REWRITE_REGEXEC_OK:
 183                 if ( mfilter.bv_val == NULL || mfilter.bv_val[0] == '\0') {
 184                         if ( mfilter.bv_val != NULL ) {
 185                                 free( mfilter.bv_val );
 186                         }
 187                         mfilter = *filterstr;
 188                 } else {
 189                         mfilter.bv_len = strlen( mfilter.bv_val );
 190                 }
 191
 192 #ifdef NEW_LOGGING
 193                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 194                                 "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 195                                 filterstr->bv_val, mfilter.bv_val ));
 196 #else /* !NEW_LOGGING */
 197                 Debug( LDAP_DEBUG_ARGS,
 198                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 199                                 filterstr->bv_val, mfilter.bv_val, "" );
 200 #endif /* !NEW_LOGGING */
 201                 break;
 202
 203         case REWRITE_REGEXEC_UNWILLING:
 204                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 205                                 NULL, "Unwilling to perform", NULL, NULL );
 206         case REWRITE_REGEXEC_ERR:
 207                 rc = -1;
 208                 goto finish;
 209         }
 210 #else /* !ENABLE_REWRITE */
 211         ldap_back_dn_massage( li, base, &mbase, 0, 1 );
 212 #endif /* !ENABLE_REWRITE */
 213
 214         mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
 215 #ifdef ENABLE_REWRITE
 216                         &mfilter,
 217 #else /* !ENABLE_REWRITE */
 218                         filterstr,
 219 #endif /* !ENABLE_REWRITE */
 220                         0);
 221         if ( mapped_filter == NULL ) {
 222 #ifdef ENABLE_REWRITE
 223                 mapped_filter = mfilter.bv_val;
 224 #else /* !ENABLE_REWRITE */
 225                 mapped_filter = filterstr->bv_val;
 226 #endif /* !ENABLE_REWRITE */
 227         }
 228
 229 #ifdef ENABLE_REWRITE
 230         if ( mfilter.bv_val != filterstr->bv_val ) {
 231                 free( mfilter.bv_val );
 232         }
 233 #endif /* ENABLE_REWRITE */
 234
 235         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0);
 236         if ( mapped_attrs == NULL && attrs) {
 237                 for (count=0; attrs[count].an_name.bv_val; count++);
 238                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 239                 for (count=0; attrs[count].an_name.bv_val; count++) {
 240                         mapped_attrs[count] = attrs[count].an_name.bv_val;
 241                 }
 242                 mapped_attrs[count] = NULL;
 243         }
 244
 245         if ((msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs,
 246                 attrsonly)) == -1)
 247         {
 248 fail:;
 249                 rc = ldap_back_op_result(lc, op);
 250                 goto finish;
 251         }
 252
 253         /* We pull apart the ber result, stuff it into a slapd entry, and
 254          * let send_search_entry stuff it back into ber format. Slow & ugly,
 255          * but this is necessary for version matching, and for ACL processing.
 256          */
 257
 258         for (   count=0, rc=0;
 259                         rc != -1;
 260                         rc = ldap_result(lc->ld, LDAP_RES_ANY, 0, &tv, &res))
 261         {
 262                 int ab;
 263
 264                 /* check for abandon */
 265                 ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 266                 ab = op->o_abandon;
 267                 ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 268
 269                 if (ab) {
 270                         ldap_abandon(lc->ld, msgid);
 271                         rc = 0;
 272                         goto finish;
 273                 }
 274                 if (rc == 0) {
 275                         tv.tv_sec = 0;
 276                         tv.tv_usec = 100000;
 277                         ldap_pvt_thread_yield();
 278                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 279                         e = ldap_first_entry(lc->ld,res);
 280                         ldap_send_entry(be, op, lc, e, attrs, attrsonly);
 281                         count++;
 282                         ldap_msgfree(res);
 283                 } else {
 284                         sres = ldap_result2error(lc->ld, res, 1);
 285                         sres = ldap_back_map_result(sres);
 286                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
 287                         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 288                         rc = 0;
 289                         break;
 290                 }
 291         }
 292
 293         if (rc == -1)
 294                 goto fail;
 295
 296 #ifdef ENABLE_REWRITE
 297         /*
 298          * Rewrite the matched portion of the search base, if required
 299          */
 300         if ( match != NULL ) {
 301                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 302                                 match, conn, &mmatch ) ) {
 303                 case REWRITE_REGEXEC_OK:
 304                         if ( mmatch == NULL ) {
 305                                 mmatch = ( char * )match;
 306                         }
 307 #ifdef NEW_LOGGING
 308                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 309                                         "[rw]  matchedDn:"
 310                                         " \"%s\" -> \"%s\"\n",
 311                                         match, mmatch ));
 312 #else /* !NEW_LOGGING */
 313                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 314                                         " \"%s\" -> \"%s\"\n%s",
 315                                         match, mmatch, "" );
 316 #endif /* !NEW_LOGGING */
 317                         break;
 318
 319                 case REWRITE_REGEXEC_UNWILLING:
 320                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 321                                         NULL, "Unwilling to perform",
 322                                         NULL, NULL );
 323
 324                 case REWRITE_REGEXEC_ERR:
 325                         rc = -1;
 326                         goto finish;
 327                 }
 328         }
 329
 330         send_search_result( conn, op, sres,
 331                 mmatch, err, NULL, NULL, count );
 332
 333 #else /* !ENABLE_REWRITE */
 334         send_search_result( conn, op, sres,
 335                 match, err, NULL, NULL, count );
 336 #endif /* !ENABLE_REWRITE */
 337
 338 finish:;
 339         if ( match ) {
 340 #ifdef ENABLE_REWRITE
 341                 if ( mmatch != match ) {
 342                         free( mmatch );
 343                 }
 344 #endif /* ENABLE_REWRITE */
 345                 LDAP_FREE(match);
 346         }
 347         if ( err ) {
 348                 LDAP_FREE( err );
 349         }
 350         if ( mapped_attrs ) {
 351                 ch_free( mapped_attrs );
 352         }
 353         if ( mapped_filter != filterstr->bv_val ) {
 354                 ch_free( mapped_filter );
 355         }
 356         if ( mbase.bv_val != base->bv_val ) {
 357                 free( mbase.bv_val );
 358         }
 359
 360         return rc;
 361 }
 362
 363 static void
 364 ldap_send_entry(
 365         Backend *be,
 366         Operation *op,
 367         struct ldapconn *lc,
 368         LDAPMessage *e,
 369         AttributeName *attrs,
 370         int attrsonly
 371 )
 372 {
 373         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 374         struct berval a, mapped;
 375         Entry ent;
 376         BerElement ber = *e->lm_ber;
 377         Attribute *attr, **attrp;
 378         struct berval dummy = { 0, NULL };
 379         struct berval *bv, bdn;
 380         const char *text;
 381
 382         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
 383                 return;
 384         }
 385 #ifdef ENABLE_REWRITE
 386
 387         /*
 388          * Rewrite the dn of the result, if needed
 389          */
 390         switch ( rewrite_session( li->rwinfo, "searchResult",
 391                                 bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) {
 392         case REWRITE_REGEXEC_OK:
 393                 if ( ent.e_name.bv_val == NULL ) {
 394                         ent.e_name = bdn;
 395                 } else {
 396 #ifdef NEW_LOGGING
 397                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 398                                         "[rw] searchResult: \"%s\""
 399                                         " -> \"%s\"\n", bdn.bv_val, ent.e_dn ));
 400 #else /* !NEW_LOGGING */
 401                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 402                                         " -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" );
 403 #endif /* !NEW_LOGGING */
 404                         ent.e_name.bv_len = strlen( ent.e_name.bv_val );
 405                 }
 406                 break;
 407
 408         case REWRITE_REGEXEC_ERR:
 409         case REWRITE_REGEXEC_UNWILLING:
 410                 return;
 411         }
 412 #else /* !ENABLE_REWRITE */
 413         ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
 414 #endif /* !ENABLE_REWRITE */
 415
 416         dnNormalize2( NULL, &ent.e_name, &ent.e_nname );
 417         ent.e_id = 0;
 418         ent.e_attrs = 0;
 419         ent.e_private = 0;
 420         attrp = &ent.e_attrs;
 421
 422         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 423                 ldap_back_map(&li->at_map, &a, &mapped, 1);
 424                 if (mapped.bv_val == NULL)
 425                         continue;
 426                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 427                 if (attr == NULL)
 428                         continue;
 429                 attr->a_flags = 0;
 430                 attr->a_next = 0;
 431                 attr->a_desc = NULL;
 432                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 433                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 434                                         != LDAP_SUCCESS) {
 435 #ifdef NEW_LOGGING
 436                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 437                                                 "slap_bv2undef_ad(%s):  "
 438                                                 "%s\n", mapped.bv_val, text ));
 439 #else /* !NEW_LOGGING */
 440                                 Debug( LDAP_DEBUG_ANY,
 441                                                 "slap_bv2undef_ad(%s):  "
 442                                                 "%s\n%s", mapped.bv_val, text, "" );
 443 #endif /* !NEW_LOGGING */
 444                                 ch_free(attr);
 445                                 continue;
 446                         }
 447                 }
 448
 449                 /* no subschemaSubentry */
 450                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 451                         ch_free(attr);
 452                         continue;
 453                 }
 454
 455                 if (ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR ) {
 456                         attr->a_vals = &dummy;
 457                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 458                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 459                         int i, last;
 460                         for ( last = 0; attr->a_vals[last].bv_val; last++ ) ;
 461                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
 462                                 ldap_back_map(&li->oc_map, bv, &mapped, 1);
 463                                 if (mapped.bv_val == NULL) {
 464                                         LBER_FREE(bv->bv_val);
 465                                         bv->bv_val = NULL;
 466                                         if (--last < 0)
 467                                                 break;
 468                                         *bv = attr->a_vals[last];
 469                                         attr->a_vals[last].bv_val = NULL;
 470                                         i--;
 471                                 } else if ( mapped.bv_val != bv->bv_val ) {
 472                                         /*
 473                                          * FIXME: after LBER_FREEing
 474                                          * the value is replaced by
 475                                          * ch_alloc'ed memory
 476                                          */
 477                                         LBER_FREE(bv->bv_val);
 478                                         ber_dupbv( bv, &mapped );
 479                                 }
 480                         }
 481
 482 #ifdef ENABLE_REWRITE
 483                 /*
 484                  * It is necessary to try to rewrite attributes with
 485                  * dn syntax because they might be used in ACLs as
 486                  * members of groups; since ACLs are applied to the
 487                  * rewritten stuff, no dn-based subecj clause could
 488                  * be used at the ldap backend side (see
 489                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 490                  * The problem can be overcome by moving the dn-based
 491                  * ACLs to the target directory server, and letting
 492                  * everything pass thru the ldap backend.
 493                  */
 494                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 495                                         SLAPD_DN_SYNTAX ) == 0 ) {
 496                         int i;
 497                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
 498                                 char *newval;
 499
 500                                 switch ( rewrite_session( li->rwinfo,
 501                                                         "searchResult",
 502                                                         bv->bv_val,
 503                                                         lc->conn, &newval )) {
 504                                 case REWRITE_REGEXEC_OK:
 505                                         /* left as is */
 506                                         if ( newval == NULL ) {
 507                                                 break;
 508                                         }
 509 #ifdef NEW_LOGGING
 510                                         LDAP_LOG(( "backend",
 511                                                         LDAP_LEVEL_DETAIL1,
 512                                                         "[rw] searchResult on"
 513                                                         " attr=%s:"
 514                                                         " \"%s\" -> \"%s\"\n",
 515                                                         attr->a_desc->ad_type->sat_cname.bv_val,
 516                                                         bv->bv_val, newval ));
 517 #else /* !NEW_LOGGING */
 518                                         Debug( LDAP_DEBUG_ARGS,
 519                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 520                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 521                                                 bv->bv_val, newval );
 522 #endif /* !NEW_LOGGING */
 523                                         free( bv->bv_val );
 524                                         bv->bv_val = newval;
 525                                         bv->bv_len = strlen( newval );
 526
 527                                         break;
 528
 529                                 case REWRITE_REGEXEC_UNWILLING:
 530
 531                                 case REWRITE_REGEXEC_ERR:
 532                                         /*
 533                                          * FIXME: better give up,
 534                                          * skip the attribute
 535                                          * or leave it untouched?
 536                                          */
 537                                         break;
 538                                 }
 539                         }
 540 #endif /* ENABLE_REWRITE */
 541                 }
 542
 543                 *attrp = attr;
 544                 attrp = &attr->a_next;
 545         }
 546         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 547         while (ent.e_attrs) {
 548                 attr = ent.e_attrs;
 549                 ent.e_attrs = attr->a_next;
 550                 if (attr->a_vals != &dummy)
 551                         ber_bvarray_free(attr->a_vals);
 552                 ch_free(attr);
 553         }
 554
 555         if ( ent.e_dn && ent.e_dn != bdn.bv_val )
 556                 free( ent.e_dn );
 557         if ( ent.e_ndn )
 558                 free( ent.e_ndn );
 559 }