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 #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.bv_val = ( char * )base->bv_val;
 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                 }
 189 #ifdef NEW_LOGGING
 190                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 191                                 "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 192                                 filterstr->bv_val, mfilter.bv_val ));
 193 #else /* !NEW_LOGGING */
 194                 Debug( LDAP_DEBUG_ARGS,
 195                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 196                                 filterstr->bv_val, mfilter.bv_val, "" );
 197 #endif /* !NEW_LOGGING */
 198                 break;
 199
 200         case REWRITE_REGEXEC_UNWILLING:
 201                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 202                                 NULL, "Unwilling to perform", NULL, NULL );
 203         case REWRITE_REGEXEC_ERR:
 204                 rc = -1;
 205                 goto finish;
 206         }
 207 #else /* !ENABLE_REWRITE */
 208         ldap_back_dn_massage( li, base, &mbase, 0, 1 );
 209 #endif /* !ENABLE_REWRITE */
 210
 211         mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
 212 #ifdef ENABLE_REWRITE
 213                         &mfilter,
 214 #else /* !ENABLE_REWRITE */
 215                         filterstr,
 216 #endif /* !ENABLE_REWRITE */
 217                         0);
 218         if ( mapped_filter == NULL ) {
 219 #ifdef ENABLE_REWRITE
 220                 mapped_filter = mfilter.bv_val;
 221 #else /* !ENABLE_REWRITE */
 222                 mapped_filter = filterstr->bv_val;
 223 #endif /* !ENABLE_REWRITE */
 224         }
 225
 226         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0);
 227         if ( mapped_attrs == NULL && attrs) {
 228                 AttributeName *an;
 229                 for (count=0, an=attrs; an; an=an->an_next,count++);
 230                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 231                 for (count=0, an=attrs; an; an=an->an_next,count++) {
 232                         mapped_attrs[count] = an->an_name.bv_val;
 233                 }
 234                 mapped_attrs[count] = NULL;
 235         }
 236
 237         if ((msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs,
 238                 attrsonly)) == -1)
 239         {
 240 fail:;
 241                 rc = ldap_back_op_result(lc, op);
 242                 goto finish;
 243         }
 244
 245         /* We pull apart the ber result, stuff it into a slapd entry, and
 246          * let send_search_entry stuff it back into ber format. Slow & ugly,
 247          * but this is necessary for version matching, and for ACL processing.
 248          */
 249
 250         for (   count=0, rc=0;
 251                         rc != -1;
 252                         rc = ldap_result(lc->ld, LDAP_RES_ANY, 0, &tv, &res))
 253         {
 254                 int ab;
 255
 256                 /* check for abandon */
 257                 ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 258                 ab = op->o_abandon;
 259                 ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 260
 261                 if (ab) {
 262                         ldap_abandon(lc->ld, msgid);
 263                         rc = 0;
 264                         goto finish;
 265                 }
 266                 if (rc == 0) {
 267                         tv.tv_sec = 0;
 268                         tv.tv_usec = 100000;
 269                         ldap_pvt_thread_yield();
 270                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 271                         e = ldap_first_entry(lc->ld,res);
 272                         ldap_send_entry(be, op, lc, e, attrs, attrsonly);
 273                         count++;
 274                         ldap_msgfree(res);
 275                 } else {
 276                         sres = ldap_result2error(lc->ld, res, 1);
 277                         sres = ldap_back_map_result(sres);
 278                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
 279                         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 280                         rc = 0;
 281                         break;
 282                 }
 283         }
 284
 285         if (rc == -1)
 286                 goto fail;
 287
 288 #ifdef ENABLE_REWRITE
 289         /*
 290          * Rewrite the matched portion of the search base, if required
 291          */
 292         if ( match != NULL ) {
 293                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 294                                 match, conn, &mmatch ) ) {
 295                 case REWRITE_REGEXEC_OK:
 296                         if ( mmatch == NULL ) {
 297                                 mmatch = ( char * )match;
 298                         }
 299 #ifdef NEW_LOGGING
 300                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 301                                         "[rw]  matchedDn:"
 302                                         " \"%s\" -> \"%s\"\n",
 303                                         match, mmatch ));
 304 #else /* !NEW_LOGGING */
 305                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 306                                         " \"%s\" -> \"%s\"\n%s",
 307                                         match, mmatch, "" );
 308 #endif /* !NEW_LOGGING */
 309                         break;
 310
 311                 case REWRITE_REGEXEC_UNWILLING:
 312                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 313                                         NULL, "Unwilling to perform",
 314                                         NULL, NULL );
 315
 316                 case REWRITE_REGEXEC_ERR:
 317                         rc = -1;
 318                         goto finish;
 319                 }
 320         }
 321
 322         send_search_result( conn, op, sres,
 323                 mmatch, err, NULL, NULL, count );
 324
 325 #else /* !ENABLE_REWRITE */
 326         send_search_result( conn, op, sres,
 327                 match, err, NULL, NULL, count );
 328 #endif /* !ENABLE_REWRITE */
 329
 330 finish:;
 331         if ( match ) {
 332 #ifdef ENABLE_REWRITE
 333                 if ( mmatch != match ) {
 334                         free( mmatch );
 335                 }
 336 #endif /* ENABLE_REWRITE */
 337                 free(match);
 338         }
 339         if ( err ) {
 340                 free( err );
 341         }
 342         if ( mapped_attrs ) {
 343                 free( mapped_attrs );
 344         }
 345 #ifdef ENABLE_REWRITE
 346         if ( mapped_filter != mfilter.bv_val ) {
 347                 free( mapped_filter );
 348         }
 349         if ( mfilter.bv_val != filterstr->bv_val ) {
 350                 free( mfilter.bv_val );
 351         }
 352 #else /* !ENABLE_REWRITE */
 353         if ( mapped_filter != filterstr->bv_val ) {
 354                 free( mapped_filter );
 355         }
 356 #endif /* !ENABLE_REWRITE */
 357
 358         if ( mbase.bv_val != base->bv_val ) {
 359                 free( mbase.bv_val );
 360         }
 361
 362         return rc;
 363 }
 364
 365 static void
 366 ldap_send_entry(
 367         Backend *be,
 368         Operation *op,
 369         struct ldapconn *lc,
 370         LDAPMessage *e,
 371         AttributeName *attrs,
 372         int attrsonly
 373 )
 374 {
 375         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 376         struct berval a, mapped;
 377         Entry ent;
 378         BerElement ber = *e->lm_ber;
 379         Attribute *attr, **attrp;
 380         struct berval dummy = { 0, NULL };
 381         struct berval *bv, bdn;
 382         const char *text;
 383
 384         if ( ber_scanf( &ber, "{o", &bdn ) == LBER_ERROR ) {
 385                 return;
 386         }
 387 #ifdef ENABLE_REWRITE
 388
 389         /*
 390          * Rewrite the dn of the result, if needed
 391          */
 392         switch ( rewrite_session( li->rwinfo, "searchResult",
 393                                 bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) {
 394         case REWRITE_REGEXEC_OK:
 395                 if ( ent.e_name.bv_val == NULL ) {
 396                         ent.e_name = bdn;
 397
 398                 } else {
 399 #ifdef NEW_LOGGING
 400                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 401                                         "[rw] searchResult: \"%s\""
 402                                         " -> \"%s\"\n", bdn.bv_val, ent.e_dn ));
 403 #else /* !NEW_LOGGING */
 404                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 405                                         " -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" );
 406 #endif /* !NEW_LOGGING */
 407                         free( bdn.bv_val );
 408                         bdn.bv_val = NULL;
 409                         ent.e_name.bv_len = strlen( ent.e_name.bv_val );
 410                 }
 411                 break;
 412
 413         case REWRITE_REGEXEC_ERR:
 414         case REWRITE_REGEXEC_UNWILLING:
 415                 return;
 416         }
 417 #else /* !ENABLE_REWRITE */
 418         ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
 419 #endif /* !ENABLE_REWRITE */
 420
 421         dnNormalize2( NULL, &ent.e_name, &ent.e_nname );
 422         ent.e_id = 0;
 423         ent.e_attrs = 0;
 424         ent.e_private = 0;
 425         attrp = &ent.e_attrs;
 426
 427         while ( ber_scanf( &ber, "{{o", &a ) != LBER_ERROR ) {
 428                 ldap_back_map(&li->at_map, &a, &mapped, 1);
 429                 if (mapped.bv_val == NULL)
 430                         continue;
 431                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 432                 if (attr == NULL)
 433                         continue;
 434                 attr->a_next = 0;
 435                 attr->a_desc = NULL;
 436                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 437                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 438                                         != LDAP_SUCCESS) {
 439 #ifdef NEW_LOGGING
 440                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 441                                                 "slap_str2undef_ad(%s): "
 442                                                 "%s\n", mapped.bv_val, text ));
 443 #else /* !NEW_LOGGING */
 444                                 Debug( LDAP_DEBUG_ANY,
 445                                                 "slap_str2undef_ad(%s): "
 446                                                 "%s\n%s", mapped.bv_val, text, "" );
 447 #endif /* !NEW_LOGGING */
 448
 449                                 ch_free(attr);
 450                                 continue;
 451                         }
 452                 }
 453                 if (ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR ) {
 454                         attr->a_vals = &dummy;
 455                 } else if ( strcasecmp( mapped.bv_val, "objectclass" ) == 0 ) {
 456                         int i, last;
 457                         for ( last = 0; attr->a_vals[last].bv_val; last++ ) ;
 458                         for ( i = 0; ( bv = &attr->a_vals[i] ); i++ ) {
 459                                 ldap_back_map(&li->oc_map, bv, &mapped, 1);
 460                                 if (mapped.bv_val == NULL) {
 461                                         free(attr->a_vals[i].bv_val);
 462                                         attr->a_vals[i].bv_val = NULL;
 463                                         if (--last < 0)
 464                                                 break;
 465                                         attr->a_vals[i] = attr->a_vals[last];
 466                                         attr->a_vals[last].bv_val = NULL;
 467                                         i--;
 468                                 } else if ( mapped.bv_val != bv->bv_val ) {
 469                                         ch_free(bv->bv_val);
 470                                         ber_dupbv( bv, &mapped );
 471                                 }
 472                         }
 473
 474 #ifdef ENABLE_REWRITE
 475                 /*
 476                  * It is necessary to try to rewrite attributes with
 477                  * dn syntax because they might be used in ACLs as
 478                  * members of groups; since ACLs are applied to the
 479                  * rewritten stuff, no dn-based subecj clause could
 480                  * be used at the ldap backend side (see
 481                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 482                  * The problem can be overcome by moving the dn-based
 483                  * ACLs to the target directory server, and letting
 484                  * everything pass thru the ldap backend.
 485                  */
 486                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 487                                         SLAPD_DN_SYNTAX ) == 0 ) {
 488                         int i;
 489                         for ( i = 0; ( bv = &attr->a_vals[ i ] ); i++ ) {
 490                                 char *newval;
 491
 492                                 switch ( rewrite_session( li->rwinfo,
 493                                                         "searchResult",
 494                                                         bv->bv_val,
 495                                                         lc->conn, &newval )) {
 496                                 case REWRITE_REGEXEC_OK:
 497                                         /* left as is */
 498                                         if ( newval == NULL ) {
 499                                                 break;
 500                                         }
 501 #ifdef NEW_LOGGING
 502                                         LDAP_LOG(( "backend",
 503                                                         LDAP_LEVEL_DETAIL1,
 504                                                         "[rw] searchResult on"
 505                                                         " attr=%s:"
 506                                                         " \"%s\" -> \"%s\"\n",
 507                                                         attr->a_desc->ad_type->sat_cname.bv_val,
 508                                                         bv->bv_val, newval ));
 509 #else /* !NEW_LOGGING */
 510                                         Debug( LDAP_DEBUG_ARGS,
 511                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 512                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 513                                                 bv->bv_val, newval );
 514 #endif /* !NEW_LOGGING */
 515
 516                                         free( bv->bv_val );
 517                                         bv->bv_val = newval;
 518                                         bv->bv_len = strlen( newval );
 519
 520                                         break;
 521
 522                                 case REWRITE_REGEXEC_UNWILLING:
 523
 524                                 case REWRITE_REGEXEC_ERR:
 525                                         /*
 526                                          * FIXME: better give up,
 527                                          * skip the attribute
 528                                          * or leave it untouched?
 529                                          */
 530                                         break;
 531                                 }
 532                         }
 533 #endif /* ENABLE_REWRITE */
 534                 }
 535
 536                 *attrp = attr;
 537                 attrp = &attr->a_next;
 538         }
 539         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 540         while (ent.e_attrs) {
 541                 attr = ent.e_attrs;
 542                 ent.e_attrs = attr->a_next;
 543                 if (attr->a_vals != &dummy)
 544                         bvarray_free(attr->a_vals);
 545                 free(attr);
 546         }
 547
 548         if ( ent.e_dn )
 549                 free( ent.e_dn );
 550         if ( ent.e_ndn )
 551                 free( ent.e_ndn );
 552 }
 553