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 #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, struct ldapconn *lc,
  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_filter = NULL, **mapped_attrs = NULL;
  78         struct berval mbase;
  79 #ifdef ENABLE_REWRITE
  80         char *mmatch = NULL;
  81         struct berval mfilter = { 0, NULL };
  82 #endif /* ENABLE_REWRITE */
  83         struct slap_limits_set *limit = NULL;
  84         int isroot = 0;
  85
  86         lc = ldap_back_getconn(li, conn, op);
  87         if ( !lc ) {
  88                 return( -1 );
  89         }
  90
  91         /* if not root, get appropriate limits */
  92         if ( be_isroot( be, &op->o_ndn ) ) {
  93                 isroot = 1;
  94         } else {
  95                 ( void ) get_limits( be, &op->o_ndn, &limit );
  96         }
  97
  98         /* if no time limit requested, rely on remote server limits */
  99         /* if requested limit higher than hard limit, abort */
 100         if ( !isroot && tlimit > limit->lms_t_hard ) {
 101                 /* no hard limit means use soft instead */
 102                 if ( limit->lms_t_hard == 0 && tlimit > limit->lms_t_soft ) {
 103                         tlimit = limit->lms_t_soft;
 104
 105                 /* positive hard limit means abort */
 106                 } else if ( limit->lms_t_hard > 0 ) {
 107                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 108                                         NULL, NULL, NULL, NULL, 0 );
 109                         rc = 0;
 110                         goto finish;
 111                 }
 112
 113                 /* negative hard limit means no limit */
 114         }
 115
 116         /* if no size limit requested, rely on remote server limits */
 117         /* if requested limit higher than hard limit, abort */
 118         if ( !isroot && slimit > limit->lms_s_hard ) {
 119                 /* no hard limit means use soft instead */
 120                 if ( limit->lms_s_hard == 0 && slimit > limit->lms_s_soft ) {
 121                         slimit = limit->lms_s_soft;
 122
 123                 /* positive hard limit means abort */
 124                 } else if ( limit->lms_s_hard > 0 ) {
 125                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 126                                         NULL, NULL, NULL, NULL, 0 );
 127                         rc = 0;
 128                         goto finish;
 129                 }
 130
 131                 /* negative hard limit means no limit */
 132         }
 133
 134         if (deref != -1)
 135                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
 136         if (tlimit != -1)
 137                 ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit);
 138         if (slimit != -1)
 139                 ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit);
 140
 141
 142         /*
 143          * controls are set in ldap_back_dobind()
 144          *
 145          * FIXME: in case of values return filter, we might want
 146          * to map attrs and maybe rewrite value
 147          */
 148         if ( !ldap_back_dobind( lc, op ) ) {
 149                 return( -1 );
 150         }
 151
 152         /*
 153          * Rewrite the search base, if required
 154          */
 155 #ifdef ENABLE_REWRITE
 156         switch ( rewrite_session( li->rwinfo, "searchBase",
 157                                 base->bv_val, conn, &mbase.bv_val ) ) {
 158         case REWRITE_REGEXEC_OK:
 159                 if ( mbase.bv_val == NULL ) {
 160                         mbase = *base;
 161                 }
 162 #ifdef NEW_LOGGING
 163                 LDAP_LOG( BACK_LDAP, DETAIL1,
 164                         "[rw] searchBase: \"%s\" -> \"%s\"\n",
 165                         base->bv_val, mbase.bv_val, 0 );
 166 #else /* !NEW_LOGGING */
 167                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 168                                 base->bv_val, mbase.bv_val, "" );
 169 #endif /* !NEW_LOGGING */
 170                 break;
 171
 172         case REWRITE_REGEXEC_UNWILLING:
 173                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 174                                 NULL, "Unwilling to perform", NULL, NULL );
 175                 rc = -1;
 176                 goto finish;
 177
 178         case REWRITE_REGEXEC_ERR:
 179                 send_ldap_result( conn, op, LDAP_OTHER,
 180                                 NULL, "Operations error", NULL, NULL );
 181                 rc = -1;
 182                 goto finish;
 183         }
 184
 185         /*
 186          * Rewrite the search filter, if required
 187          */
 188         switch ( rewrite_session( li->rwinfo, "searchFilter",
 189                                 filterstr->bv_val, conn, &mfilter.bv_val ) ) {
 190         case REWRITE_REGEXEC_OK:
 191                 if ( mfilter.bv_val == NULL || mfilter.bv_val[0] == '\0') {
 192                         if ( mfilter.bv_val != NULL ) {
 193                                 free( mfilter.bv_val );
 194                         }
 195                         mfilter = *filterstr;
 196                 } else {
 197                         mfilter.bv_len = strlen( mfilter.bv_val );
 198                 }
 199
 200 #ifdef NEW_LOGGING
 201                 LDAP_LOG( BACK_LDAP, DETAIL1,
 202                         "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 203                         filterstr->bv_val, mfilter.bv_val, 0 );
 204 #else /* !NEW_LOGGING */
 205                 Debug( LDAP_DEBUG_ARGS,
 206                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 207                                 filterstr->bv_val, mfilter.bv_val, "" );
 208 #endif /* !NEW_LOGGING */
 209                 break;
 210
 211         case REWRITE_REGEXEC_UNWILLING:
 212                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 213                                 NULL, "Unwilling to perform", NULL, NULL );
 214         case REWRITE_REGEXEC_ERR:
 215                 rc = -1;
 216                 goto finish;
 217         }
 218 #else /* !ENABLE_REWRITE */
 219         ldap_back_dn_massage( li, base, &mbase, 0, 1 );
 220 #endif /* !ENABLE_REWRITE */
 221
 222         mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
 223 #ifdef ENABLE_REWRITE
 224                         &mfilter,
 225 #else /* !ENABLE_REWRITE */
 226                         filterstr,
 227 #endif /* !ENABLE_REWRITE */
 228                         0);
 229         if ( mapped_filter == NULL ) {
 230 #ifdef ENABLE_REWRITE
 231                 mapped_filter = mfilter.bv_val;
 232 #else /* !ENABLE_REWRITE */
 233                 mapped_filter = filterstr->bv_val;
 234 #endif /* !ENABLE_REWRITE */
 235         }
 236
 237 #ifdef ENABLE_REWRITE
 238         if ( mfilter.bv_val != filterstr->bv_val ) {
 239                 free( mfilter.bv_val );
 240         }
 241 #endif /* ENABLE_REWRITE */
 242
 243         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0);
 244         if ( mapped_attrs == NULL && attrs) {
 245                 for (count=0; attrs[count].an_name.bv_val; count++);
 246                 mapped_attrs = ch_malloc( (count+1) * sizeof(char *));
 247                 for (count=0; attrs[count].an_name.bv_val; count++) {
 248                         mapped_attrs[count] = attrs[count].an_name.bv_val;
 249                 }
 250                 mapped_attrs[count] = NULL;
 251         }
 252
 253         if ((msgid = ldap_search(lc->ld, mbase.bv_val, scope, mapped_filter, mapped_attrs,
 254                 attrsonly)) == -1)
 255         {
 256 fail:;
 257                 rc = ldap_back_op_result(lc, op);
 258                 goto finish;
 259         }
 260
 261         /* We pull apart the ber result, stuff it into a slapd entry, and
 262          * let send_search_entry stuff it back into ber format. Slow & ugly,
 263          * but this is necessary for version matching, and for ACL processing.
 264          */
 265
 266         for (   count=0, rc=0;
 267                         rc != -1;
 268                         rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 269         {
 270                 /* check for abandon */
 271                 if (op->o_abandon) {
 272                         ldap_abandon(lc->ld, msgid);
 273                         rc = 0;
 274                         goto finish;
 275                 }
 276                 if (rc == 0) {
 277                         tv.tv_sec = 0;
 278                         tv.tv_usec = 100000;
 279                         ldap_pvt_thread_yield();
 280                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 281                         e = ldap_first_entry(lc->ld,res);
 282                         if ( ldap_send_entry(be, op, lc, e, attrs, attrsonly) == LDAP_SUCCESS ) {
 283                                 count++;
 284                         }
 285                         ldap_msgfree(res);
 286                 } else {
 287                         sres = ldap_result2error(lc->ld, res, 1);
 288                         sres = ldap_back_map_result(sres);
 289                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
 290                         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 291                         rc = 0;
 292                         break;
 293                 }
 294         }
 295
 296         if (rc == -1)
 297                 goto fail;
 298
 299 #ifdef ENABLE_REWRITE
 300         /*
 301          * Rewrite the matched portion of the search base, if required
 302          */
 303         if ( match != NULL ) {
 304                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 305                                 match, conn, &mmatch ) ) {
 306                 case REWRITE_REGEXEC_OK:
 307                         if ( mmatch == NULL ) {
 308                                 mmatch = ( char * )match;
 309                         }
 310 #ifdef NEW_LOGGING
 311                         LDAP_LOG( BACK_LDAP, DETAIL1,
 312                                 "[rw]  matchedDn:" " \"%s\" -> \"%s\"\n", match, mmatch, 0 );
 313 #else /* !NEW_LOGGING */
 314                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 315                                         " \"%s\" -> \"%s\"\n%s",
 316                                         match, mmatch, "" );
 317 #endif /* !NEW_LOGGING */
 318                         break;
 319
 320                 case REWRITE_REGEXEC_UNWILLING:
 321                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 322                                         NULL, "Unwilling to perform",
 323                                         NULL, NULL );
 324
 325                 case REWRITE_REGEXEC_ERR:
 326                         rc = -1;
 327                         goto finish;
 328                 }
 329         }
 330
 331         send_search_result( conn, op, sres,
 332                 mmatch, err, NULL, NULL, count );
 333
 334 #else /* !ENABLE_REWRITE */
 335         send_search_result( conn, op, sres,
 336                 match, err, NULL, NULL, count );
 337 #endif /* !ENABLE_REWRITE */
 338
 339 finish:;
 340         if ( match ) {
 341 #ifdef ENABLE_REWRITE
 342                 if ( mmatch != match ) {
 343                         free( mmatch );
 344                 }
 345 #endif /* ENABLE_REWRITE */
 346                 LDAP_FREE(match);
 347         }
 348         if ( err ) {
 349                 LDAP_FREE( err );
 350         }
 351         if ( mapped_attrs ) {
 352                 ch_free( mapped_attrs );
 353         }
 354         if ( mapped_filter != filterstr->bv_val ) {
 355                 ch_free( mapped_filter );
 356         }
 357         if ( mbase.bv_val != base->bv_val ) {
 358                 free( mbase.bv_val );
 359         }
 360
 361         return rc;
 362 }
 363
 364 static int
 365 ldap_send_entry(
 366         Backend *be,
 367         Operation *op,
 368         struct ldapconn *lc,
 369         LDAPMessage *e,
 370         AttributeName *attrs,
 371         int attrsonly
 372 )
 373 {
 374         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 375         struct berval a, mapped;
 376         Entry ent;
 377         BerElement ber = *e->lm_ber;
 378         Attribute *attr, **attrp;
 379         struct berval dummy = { 0, NULL };
 380         struct berval *bv, bdn;
 381         const char *text;
 382
 383         if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
 384                 return LDAP_DECODING_ERROR;
 385         }
 386 #ifdef ENABLE_REWRITE
 387
 388         /*
 389          * Rewrite the dn of the result, if needed
 390          */
 391         switch ( rewrite_session( li->rwinfo, "searchResult",
 392                                 bdn.bv_val, lc->conn, &ent.e_name.bv_val ) ) {
 393         case REWRITE_REGEXEC_OK:
 394                 if ( ent.e_name.bv_val == NULL ) {
 395                         ent.e_name = bdn;
 396                 } else {
 397 #ifdef NEW_LOGGING
 398                         LDAP_LOG( BACK_LDAP, DETAIL1,
 399                                 "[rw] searchResult: \"%s\"" " -> \"%s\"\n",
 400                                 bdn.bv_val, ent.e_dn, 0 );
 401 #else /* !NEW_LOGGING */
 402                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 403                                         " -> \"%s\"\n%s", bdn.bv_val, ent.e_dn, "" );
 404 #endif /* !NEW_LOGGING */
 405                         ent.e_name.bv_len = strlen( ent.e_name.bv_val );
 406                 }
 407                 break;
 408
 409         case REWRITE_REGEXEC_ERR:
 410         case REWRITE_REGEXEC_UNWILLING:
 411                 return LDAP_OTHER;
 412         }
 413 #else /* !ENABLE_REWRITE */
 414         ldap_back_dn_massage( li, &bdn, &ent.e_name, 0, 0 );
 415 #endif /* !ENABLE_REWRITE */
 416
 417         /*
 418          * Note: this may fail if the target host(s) schema differs
 419          * from the one known to the meta, and a DN with unknown
 420          * attributes is returned.
 421          *
 422          * FIXME: should we log anything, or delegate to dnNormalize2?
 423          */
 424         if ( dnNormalize2( NULL, &ent.e_name, &ent.e_nname ) != LDAP_SUCCESS ) {
 425                 return LDAP_INVALID_DN_SYNTAX;
 426         }
 427
 428         ent.e_id = 0;
 429         ent.e_attrs = 0;
 430         ent.e_private = 0;
 431         attrp = &ent.e_attrs;
 432
 433         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 434                 ldap_back_map(&li->at_map, &a, &mapped, 1);
 435                 if (mapped.bv_val == NULL)
 436                         continue;
 437                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 438                 if (attr == NULL)
 439                         continue;
 440                 attr->a_flags = 0;
 441                 attr->a_next = 0;
 442                 attr->a_desc = NULL;
 443                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 444                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 445                                         != LDAP_SUCCESS) {
 446 #ifdef NEW_LOGGING
 447                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 448                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 449 #else /* !NEW_LOGGING */
 450                                 Debug( LDAP_DEBUG_ANY,
 451                                                 "slap_bv2undef_ad(%s):  "
 452                                                 "%s\n%s", mapped.bv_val, text, "" );
 453 #endif /* !NEW_LOGGING */
 454                                 ch_free(attr);
 455                                 continue;
 456                         }
 457                 }
 458
 459                 /* no subschemaSubentry */
 460                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 461                         ch_free(attr);
 462                         continue;
 463                 }
 464
 465                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 466                                 || attr->a_vals == NULL ) {
 467                         /*
 468                          * Note: attr->a_vals can be null when using
 469                          * values result filter
 470                          */
 471                         attr->a_vals = &dummy;
 472
 473                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 474                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 475                         int i, last;
 476
 477                         for ( last = 0; attr->a_vals[last].bv_val; last++ ) ;
 478                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
 479                                 ldap_back_map(&li->oc_map, bv, &mapped, 1);
 480                                 if (mapped.bv_val == NULL) {
 481                                         LBER_FREE(bv->bv_val);
 482                                         bv->bv_val = NULL;
 483                                         if (--last < 0)
 484                                                 break;
 485                                         *bv = attr->a_vals[last];
 486                                         attr->a_vals[last].bv_val = NULL;
 487                                         i--;
 488                                 } else if ( mapped.bv_val != bv->bv_val ) {
 489                                         /*
 490                                          * FIXME: after LBER_FREEing
 491                                          * the value is replaced by
 492                                          * ch_alloc'ed memory
 493                                          */
 494                                         LBER_FREE(bv->bv_val);
 495                                         ber_dupbv( bv, &mapped );
 496                                 }
 497                         }
 498
 499                 /*
 500                  * It is necessary to try to rewrite attributes with
 501                  * dn syntax because they might be used in ACLs as
 502                  * members of groups; since ACLs are applied to the
 503                  * rewritten stuff, no dn-based subject clause could
 504                  * be used at the ldap backend side (see
 505                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 506                  * The problem can be overcome by moving the dn-based
 507                  * ACLs to the target directory server, and letting
 508                  * everything pass thru the ldap backend.
 509                  */
 510                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 511                                         SLAPD_DN_SYNTAX ) == 0 ) {
 512                         int i;
 513                         for ( i = 0, bv = attr->a_vals; bv->bv_val; bv++, i++ ) {
 514                                 struct berval newval;
 515
 516 #ifdef ENABLE_REWRITE
 517                                 switch ( rewrite_session( li->rwinfo,
 518                                                         "searchResult",
 519                                                         bv->bv_val,
 520                                                         lc->conn,
 521                                                         &newval.bv_val )) {
 522                                 case REWRITE_REGEXEC_OK:
 523                                         /* left as is */
 524                                         if ( newval.bv_val == NULL ) {
 525                                                 break;
 526                                         }
 527                                         newval.bv_len = strlen( newval.bv_val );
 528 #ifdef NEW_LOGGING
 529                                         LDAP_LOG( BACK_LDAP, DETAIL1,
 530                                                 "[rw] searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 531                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 532                                                 bv->bv_val, newval.bv_val );
 533 #else /* !NEW_LOGGING */
 534                                         Debug( LDAP_DEBUG_ARGS,
 535                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 536                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 537                                                 bv->bv_val, newval.bv_val );
 538 #endif /* !NEW_LOGGING */
 539                                         free( bv->bv_val );
 540                                         *bv = newval;
 541                                         break;
 542
 543                                 case REWRITE_REGEXEC_UNWILLING:
 544
 545                                 case REWRITE_REGEXEC_ERR:
 546                                         /*
 547                                          * FIXME: better give up,
 548                                          * skip the attribute
 549                                          * or leave it untouched?
 550                                          */
 551                                         break;
 552                                 }
 553 #else /* !ENABLE_REWRITE */
 554                                 ldap_back_dn_massage( li, bv, &newval, 0, 0 );
 555                                 *bv = newval;
 556 #endif /* !ENABLE_REWRITE */
 557                         }
 558                 }
 559
 560                 *attrp = attr;
 561                 attrp = &attr->a_next;
 562         }
 563         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 564         while (ent.e_attrs) {
 565                 attr = ent.e_attrs;
 566                 ent.e_attrs = attr->a_next;
 567                 if (attr->a_vals != &dummy)
 568                         ber_bvarray_free(attr->a_vals);
 569                 ch_free(attr);
 570         }
 571
 572         if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 573                 free( ent.e_dn );
 574         if ( ent.e_ndn )
 575                 free( ent.e_ndn );
 576
 577         return LDAP_SUCCESS;
 578 }