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
  49 static void ldap_send_entry( Backend *be, Operation *op, struct ldapconn *lc,
  50                              LDAPMessage *e, struct berval **attrs, int attrsonly );
  51
  52 int
  53 ldap_back_search(
  54     Backend     *be,
  55     Connection  *conn,
  56     Operation   *op,
  57     const char  *base,
  58     const char  *nbase,
  59     int         scope,
  60     int         deref,
  61     int         slimit,
  62     int         tlimit,
  63     Filter      *filter,
  64     const char  *filterstr,
  65     struct berval       **attrs,
  66     int         attrsonly
  67 )
  68 {
  69         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
  70         struct ldapconn *lc;
  71         struct timeval  tv;
  72         LDAPMessage             *res, *e;
  73         int     count, rc = 0, msgid, sres = LDAP_SUCCESS;
  74         char *match = NULL, *err = NULL;
  75         char *mbase = NULL, *mapped_filter = NULL, **mapped_attrs = NULL;
  76 #ifdef ENABLE_REWRITE
  77         char *mfilter = NULL, *mmatch = NULL;
  78 #endif /* ENABLE_REWRITE */
  79         struct slap_limits_set *limit = NULL;
  80         int isroot = 0;
  81
  82         lc = ldap_back_getconn(li, conn, op);
  83         if ( !lc ) {
  84                 return( -1 );
  85         }
  86
  87         /* if not root, get appropriate limits */
  88         if ( be_isroot( be, &op->o_ndn ) ) {
  89                 isroot = 1;
  90         } else {
  91                 ( void ) get_limits( be, op->o_ndn.bv_val, &limit );
  92         }
  93
  94         /* if no time limit requested, rely on remote server limits */
  95         /* if requested limit higher than hard limit, abort */
  96         if ( !isroot && tlimit > limit->lms_t_hard ) {
  97                 /* no hard limit means use soft instead */
  98                 if ( limit->lms_t_hard == 0 ) {
  99                         tlimit = limit->lms_t_soft;
 100
 101                 /* positive hard limit means abort */
 102                 } else if ( limit->lms_t_hard > 0 ) {
 103                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 104                                         NULL, NULL, NULL, NULL, 0 );
 105                         rc = 0;
 106                         goto finish;
 107                 }
 108
 109                 /* negative hard limit means no limit */
 110         }
 111
 112         /* if no size limit requested, rely on remote server limits */
 113         /* if requested limit higher than hard limit, abort */
 114         if ( !isroot && slimit > limit->lms_s_hard ) {
 115                 /* no hard limit means use soft instead */
 116                 if ( limit->lms_s_hard == 0 ) {
 117                         slimit = limit->lms_s_soft;
 118
 119                 /* positive hard limit means abort */
 120                 } else if ( limit->lms_s_hard > 0 ) {
 121                         send_search_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 122                                         NULL, NULL, NULL, NULL, 0 );
 123                         rc = 0;
 124                         goto finish;
 125                 }
 126
 127                 /* negative hard limit means no limit */
 128         }
 129
 130         if (deref != -1)
 131                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&deref);
 132         if (tlimit != -1)
 133                 ldap_set_option( lc->ld, LDAP_OPT_TIMELIMIT, (void *)&tlimit);
 134         if (slimit != -1)
 135                 ldap_set_option( lc->ld, LDAP_OPT_SIZELIMIT, (void *)&slimit);
 136
 137         if ( !ldap_back_dobind( lc, op ) ) {
 138                 return( -1 );
 139         }
 140
 141         /*
 142          * Rewrite the search base, if required
 143          */
 144 #ifdef ENABLE_REWRITE
 145         switch ( rewrite_session( li->rwinfo, "searchBase",
 146                                 base, conn, &mbase ) ) {
 147         case REWRITE_REGEXEC_OK:
 148                 if ( mbase == NULL ) {
 149                         mbase = ( char * )base;
 150                 }
 151 #ifdef NEW_LOGGING
 152                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 153                                 "[rw] searchBase: \"%s\" -> \"%s\"\n%",
 154                                 base, mbase ));
 155 #else /* !NEW_LOGGING */
 156                 Debug( LDAP_DEBUG_ARGS, "rw> searchBase: \"%s\" -> \"%s\"\n%s",
 157                                 base, mbase, "" );
 158 #endif /* !NEW_LOGGING */
 159                 break;
 160
 161         case REWRITE_REGEXEC_UNWILLING:
 162                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 163                                 NULL, "Unwilling to perform", NULL, NULL );
 164                 rc = -1;
 165                 goto finish;
 166
 167         case REWRITE_REGEXEC_ERR:
 168                 send_ldap_result( conn, op, LDAP_OPERATIONS_ERROR,
 169                                 NULL, "Operations error", NULL, NULL );
 170                 rc = -1;
 171                 goto finish;
 172         }
 173
 174         /*
 175          * Rewrite the search filter, if required
 176          */
 177         switch ( rewrite_session( li->rwinfo, "searchFilter",
 178                                 filterstr, conn, &mfilter ) ) {
 179         case REWRITE_REGEXEC_OK:
 180                 if ( mfilter == NULL || mfilter[0] == '\0') {
 181                         if ( mfilter != NULL ) {
 182                                 free( mfilter );
 183                         }
 184                         mfilter = ( char * )filterstr;
 185                 }
 186 #ifdef NEW_LOGGING
 187                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 188                                 "[rw] searchFilter: \"%s\" -> \"%s\"\n",
 189                                 filterstr, mfilter ));
 190 #else /* !NEW_LOGGING */
 191                 Debug( LDAP_DEBUG_ARGS,
 192                                 "rw> searchFilter: \"%s\" -> \"%s\"\n%s",
 193                                 filterstr, mfilter, "" );
 194 #endif /* !NEW_LOGGING */
 195                 break;
 196
 197         case REWRITE_REGEXEC_UNWILLING:
 198                 send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 199                                 NULL, "Unwilling to perform", NULL, NULL );
 200         case REWRITE_REGEXEC_ERR:
 201                 rc = -1;
 202                 goto finish;
 203         }
 204 #else /* !ENABLE_REWRITE */
 205         mbase = ldap_back_dn_massage( li, ch_strdup( base ), 0 );
 206 #endif /* !ENABLE_REWRITE */
 207
 208         mapped_filter = ldap_back_map_filter(&li->at_map, &li->oc_map,
 209 #ifdef ENABLE_REWRITE
 210                         (char *)mfilter,
 211 #else /* !ENABLE_REWRITE */
 212                         (char *)filterstr,
 213 #endif /* !ENABLE_REWRITE */
 214                         0);
 215         if ( mapped_filter == NULL ) {
 216 #ifdef ENABLE_REWRITE
 217                 mapped_filter = (char *)mfilter;
 218 #else /* !ENABLE_REWRITE */
 219                 mapped_filter = (char *)filterstr;
 220 #endif /* !ENABLE_REWRITE */
 221         }
 222
 223         mapped_attrs = ldap_back_map_attrs(&li->at_map, attrs, 0);
 224         if ( mapped_attrs == NULL ) {
 225                 mapped_attrs = attrs;
 226         }
 227
 228         if ((msgid = ldap_search(lc->ld, mbase, scope, mapped_filter, mapped_attrs,
 229                 attrsonly)) == -1)
 230         {
 231 fail:;
 232                 rc = ldap_back_op_result(lc, op);
 233                 goto finish;
 234         }
 235
 236         /* We pull apart the ber result, stuff it into a slapd entry, and
 237          * let send_search_entry stuff it back into ber format. Slow & ugly,
 238          * but this is necessary for version matching, and for ACL processing.
 239          */
 240
 241         for (   count=0, rc=0;
 242                         rc != -1;
 243                         rc = ldap_result(lc->ld, LDAP_RES_ANY, 0, &tv, &res))
 244         {
 245                 int ab;
 246
 247                 /* check for abandon */
 248                 ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
 249                 ab = op->o_abandon;
 250                 ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
 251
 252                 if (ab) {
 253                         ldap_abandon(lc->ld, msgid);
 254                         rc = 0;
 255                         goto finish;
 256                 }
 257                 if (rc == 0) {
 258                         tv.tv_sec = 0;
 259                         tv.tv_usec = 100000;
 260                         ldap_pvt_thread_yield();
 261                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 262                         e = ldap_first_entry(lc->ld,res);
 263                         ldap_send_entry(be, op, lc, e, attrs, attrsonly);
 264                         count++;
 265                         ldap_msgfree(res);
 266                 } else {
 267                         sres = ldap_result2error(lc->ld, res, 1);
 268                         sres = ldap_back_map_result(sres);
 269                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_STRING, &err);
 270                         ldap_get_option(lc->ld, LDAP_OPT_MATCHED_DN, &match);
 271                         rc = 0;
 272                         break;
 273                 }
 274         }
 275
 276         if (rc == -1)
 277                 goto fail;
 278
 279 #ifdef ENABLE_REWRITE
 280         /*
 281          * Rewrite the matched portion of the search base, if required
 282          */
 283         if ( match != NULL ) {
 284                 switch ( rewrite_session( li->rwinfo, "matchedDn",
 285                                 match, conn, &mmatch ) ) {
 286                 case REWRITE_REGEXEC_OK:
 287                         if ( mmatch == NULL ) {
 288                                 mmatch = ( char * )match;
 289                         }
 290 #ifdef NEW_LOGGING
 291                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 292                                         "[rw]  matchedDn:"
 293                                         " \"%s\" -> \"%s\"\n",
 294                                         match, mmatch ));
 295 #else /* !NEW_LOGGING */
 296                         Debug( LDAP_DEBUG_ARGS, "rw> matchedDn:"
 297                                         " \"%s\" -> \"%s\"\n%s",
 298                                         match, mmatch, "" );
 299 #endif /* !NEW_LOGGING */
 300                         break;
 301
 302                 case REWRITE_REGEXEC_UNWILLING:
 303                         send_ldap_result( conn, op, LDAP_UNWILLING_TO_PERFORM,
 304                                         NULL, "Unwilling to perform",
 305                                         NULL, NULL );
 306
 307                 case REWRITE_REGEXEC_ERR:
 308                         rc = -1;
 309                         goto finish;
 310                 }
 311         }
 312
 313         send_search_result( conn, op, sres,
 314                 mmatch, err, NULL, NULL, count );
 315
 316 #else /* !ENABLE_REWRITE */
 317         send_search_result( conn, op, sres,
 318                 match, err, NULL, NULL, count );
 319 #endif /* !ENABLE_REWRITE */
 320
 321 finish:;
 322         if ( match ) {
 323 #ifdef ENABLE_REWRITE
 324                 if ( mmatch != match ) {
 325                         free( mmatch );
 326                 }
 327 #endif /* ENABLE_REWRITE */
 328                 free(match);
 329         }
 330         if ( err ) {
 331                 free( err );
 332         }
 333         if ( mapped_attrs != attrs ) {
 334                 charray_free( mapped_attrs );
 335         }
 336 #ifdef ENABLE_REWRITE
 337         if ( mapped_filter != mfilter ) {
 338                 free( mapped_filter );
 339         }
 340         if ( mfilter != filterstr ) {
 341                 free( mfilter );
 342         }
 343 #else /* !ENABLE_REWRITE */
 344         if ( mapped_filter != filterstr ) {
 345                 free( mapped_filter );
 346         }
 347 #endif /* !ENABLE_REWRITE */
 348
 349 #ifdef ENABLE_REWRITE
 350         if ( mbase != base ) {
 351 #endif /* ENABLE_REWRITE */
 352                 free( mbase );
 353 #ifdef ENABLE_REWRITE
 354         }
 355 #endif /* ENABLE_REWRITE */
 356
 357         return rc;
 358 }
 359
 360 static void
 361 ldap_send_entry(
 362         Backend *be,
 363         Operation *op,
 364         struct ldapconn *lc,
 365         LDAPMessage *e,
 366         struct berval **attrs,
 367         int attrsonly
 368 )
 369 {
 370         struct ldapinfo *li = (struct ldapinfo *) be->be_private;
 371         char *a, *mapped;
 372         Entry ent;
 373         BerElement *ber = NULL;
 374         Attribute *attr, **attrp;
 375         struct berval *dummy = NULL;
 376         struct berval *bv;
 377         const char *text;
 378
 379 #ifdef ENABLE_REWRITE
 380         char *dn;
 381
 382         dn = ldap_get_dn(lc->ld, e);
 383         if ( dn == NULL ) {
 384                 return;
 385         }
 386
 387         /*
 388          * Rewrite the dn of the result, if needed
 389          */
 390         switch ( rewrite_session( li->rwinfo, "searchResult",
 391                                 dn, lc->conn, &ent.e_dn ) ) {
 392         case REWRITE_REGEXEC_OK:
 393                 if ( ent.e_dn == NULL ) {
 394                         ent.e_dn = dn;
 395                 } else {
 396 #ifdef NEW_LOGGING
 397                         LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 398                                         "[rw] searchResult: \"%s\""
 399                                         " -> \"%s\"\n", dn, ent.e_dn ));
 400 #else /* !NEW_LOGGING */
 401                         Debug( LDAP_DEBUG_ARGS, "rw> searchResult: \"%s\""
 402                                         " -> \"%s\"\n%s", dn, ent.e_dn, "" );
 403 #endif /* !NEW_LOGGING */
 404                         free( dn );
 405                         dn = NULL;
 406                 }
 407                 break;
 408
 409         case REWRITE_REGEXEC_ERR:
 410         case REWRITE_REGEXEC_UNWILLING:
 411                 free( dn );
 412                 return;
 413         }
 414 #else /* !ENABLE_REWRITE */
 415         ent.e_dn = ldap_back_dn_restore( li, ldap_get_dn(lc->ld, e), 0 );
 416 #endif /* !ENABLE_REWRITE */
 417
 418         ent.e_ndn = ch_strdup( ent.e_dn );
 419         (void) dn_normalize( ent.e_ndn );
 420         ent.e_id = 0;
 421         ent.e_attrs = 0;
 422         ent.e_private = 0;
 423         attrp = &ent.e_attrs;
 424
 425         for (   a = ldap_first_attribute(lc->ld, e, &ber);
 426                         a != NULL;
 427                         a = ldap_next_attribute(lc->ld, e, ber))
 428         {
 429                 mapped = ldap_back_map(&li->at_map, a, 1);
 430                 if (mapped == NULL)
 431                         continue;
 432                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 433                 if (attr == NULL)
 434                         continue;
 435                 attr->a_next = 0;
 436                 attr->a_desc = NULL;
 437                 if (slap_str2ad(mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 438                         if (slap_str2undef_ad(mapped, &attr->a_desc, &text)
 439                                         != LDAP_SUCCESS) {
 440 #ifdef NEW_LOGGING
 441                                 LDAP_LOG(( "backend", LDAP_LEVEL_DETAIL1,
 442                                                 "slap_str2undef_ad(%s): "
 443                                                 "%s\n", mapped, text ));
 444 #else /* !NEW_LOGGING */
 445                                 Debug( LDAP_DEBUG_ANY,
 446                                                 "slap_str2undef_ad(%s): "
 447                                                 "%s\n%s", mapped, text, "" );
 448 #endif /* !NEW_LOGGING */
 449
 450                                 ch_free(attr);
 451                                 continue;
 452                         }
 453                 }
 454                 attr->a_vals = ldap_get_values_len(lc->ld, e, a);
 455                 if (!attr->a_vals) {
 456                         attr->a_vals = &dummy;
 457                 } else if ( strcasecmp( mapped, "objectclass" ) == 0 ) {
 458                         int i, last;
 459                         for ( last = 0; attr->a_vals[last]; last++ ) ;
 460                         for ( i = 0; ( bv = attr->a_vals[i] ); i++ ) {
 461                                 mapped = ldap_back_map(&li->oc_map, bv->bv_val, 1);
 462                                 if (mapped == NULL) {
 463                                         ber_bvfree(attr->a_vals[i]);
 464                                         attr->a_vals[i] = NULL;
 465                                         if (--last < 0)
 466                                                 break;
 467                                         attr->a_vals[i] = attr->a_vals[last];
 468                                         attr->a_vals[last] = NULL;
 469                                         i--;
 470                                 } else if ( mapped != bv->bv_val ) {
 471                                         ch_free(bv->bv_val);
 472                                         bv->bv_val = ch_strdup( mapped );
 473                                         bv->bv_len = strlen( mapped );
 474                                 }
 475                         }
 476
 477 #ifdef ENABLE_REWRITE
 478                 /*
 479                  * It is necessary to try to rewrite attributes with
 480                  * dn syntax because they might be used in ACLs as
 481                  * members of groups; since ACLs are applied to the
 482                  * rewritten stuff, no dn-based subecj clause could
 483                  * be used at the ldap backend side (see
 484                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 485                  * The problem can be overcome by moving the dn-based
 486                  * ACLs to the target directory server, and letting
 487                  * everything pass thru the ldap backend.
 488                  */
 489                 } else if ( strcmp( attr->a_desc->ad_type->sat_syntax->ssyn_oid,
 490                                         SLAPD_DN_SYNTAX ) == 0 ) {
 491                         int i;
 492                         for ( i = 0; ( bv = attr->a_vals[ i ] ); i++ ) {
 493                                 char *newval;
 494
 495                                 switch ( rewrite_session( li->rwinfo,
 496                                                         "searchResult",
 497                                                         bv->bv_val,
 498                                                         lc->conn, &newval )) {
 499                                 case REWRITE_REGEXEC_OK:
 500                                         /* left as is */
 501                                         if ( newval == NULL ) {
 502                                                 break;
 503                                         }
 504 #ifdef NEW_LOGGING
 505                                         LDAP_LOG(( "backend",
 506                                                         LDAP_LEVEL_DETAIL1,
 507                                                         "[rw] searchResult on"
 508                                                         " attr=%s:"
 509                                                         " \"%s\" -> \"%s\"\n",
 510                                                         attr->a_desc->ad_type->sat_cname.bv_val,
 511                                                         bv->bv_val, newval ));
 512 #else /* !NEW_LOGGING */
 513                                         Debug( LDAP_DEBUG_ARGS,
 514                 "rw> searchResult on attr=%s: \"%s\" -> \"%s\"\n",
 515                                                 attr->a_desc->ad_type->sat_cname.bv_val,
 516                                                 bv->bv_val, newval );
 517 #endif /* !NEW_LOGGING */
 518
 519                                         free( bv->bv_val );
 520                                         bv->bv_val = newval;
 521                                         bv->bv_len = strlen( newval );
 522
 523                                         break;
 524
 525                                 case REWRITE_REGEXEC_UNWILLING:
 526
 527                                 case REWRITE_REGEXEC_ERR:
 528                                         /*
 529                                          * FIXME: better give up,
 530                                          * skip the attribute
 531                                          * or leave it untouched?
 532                                          */
 533                                         break;
 534                                 }
 535                         }
 536 #endif /* ENABLE_REWRITE */
 537                 }
 538
 539                 *attrp = attr;
 540                 attrp = &attr->a_next;
 541         }
 542         send_search_entry( be, lc->conn, op, &ent, attrs, attrsonly, NULL );
 543         while (ent.e_attrs) {
 544                 attr = ent.e_attrs;
 545                 ent.e_attrs = attr->a_next;
 546                 if (attr->a_vals != &dummy)
 547                         ber_bvecfree(attr->a_vals);
 548                 free(attr);
 549         }
 550         if (ber)
 551                 ber_free(ber,0);
 552
 553         if ( ent.e_dn )
 554                 free( ent.e_dn );
 555         if ( ent.e_ndn )
 556                 free( ent.e_ndn );
 557 }
 558