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