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