git.sur5r.net Git - openldap/blob - libraries/libldap/result.c

   1 /* result.c - wait for an ldap result */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2006 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1990 Regents of the University of Michigan.
  17  * All rights reserved.
  18  */
  19 /* This notice applies to changes, created by or for Novell, Inc.,
  20  * to preexisting works for which notices appear elsewhere in this file.
  21  *
  22  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  23  *
  24  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  25  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  26  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  27  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  28  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  29  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  30  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  31  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  32  *---
  33  * Modification to OpenLDAP source by Novell, Inc.
  34  * April 2000 sfs Add code to process V3 referrals and search results
  35  *---
  36  * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License
  37  * can be found in the file "build/LICENSE-2.0.1" in this distribution
  38  * of OpenLDAP Software.
  39  */
  40 /* Portions Copyright (C) The Internet Society (1997)
  41  * ASN.1 fragments are from RFC 2251; see RFC for full legal notices.
  42  */
  43
  44 /*
  45  * LDAPv3 (RFC2251)
  46  *      LDAPResult ::= SEQUENCE {
  47  *              resultCode              ENUMERATED { ... },
  48  *              matchedDN               LDAPDN,
  49  *              errorMessage    LDAPString,
  50  *              referral                Referral OPTIONAL
  51  *      }
  52  *      Referral ::= SEQUENCE OF LDAPURL        (one or more)
  53  *      LDAPURL ::= LDAPString                          (limited to URL chars)
  54  */
  55
  56 #include "portable.h"
  57
  58 #include <stdio.h>
  59
  60 #include <ac/stdlib.h>
  61
  62 #include <ac/errno.h>
  63 #include <ac/socket.h>
  64 #include <ac/string.h>
  65 #include <ac/time.h>
  66 #include <ac/unistd.h>
  67
  68 #include "ldap-int.h"
  69 #include "ldap_log.h"
  70
  71 static int ldap_abandoned LDAP_P(( LDAP *ld, ber_int_t msgid ));
  72 static int ldap_mark_abandoned LDAP_P(( LDAP *ld, ber_int_t msgid ));
  73 static int wait4msg LDAP_P(( LDAP *ld, ber_int_t msgid, int all, struct timeval *timeout,
  74         LDAPMessage **result ));
  75 static ber_tag_t try_read1msg LDAP_P(( LDAP *ld, ber_int_t msgid,
  76         int all, Sockbuf *sb, LDAPConn **lc, LDAPMessage **result ));
  77 static ber_tag_t build_result_ber LDAP_P(( LDAP *ld, BerElement **bp, LDAPRequest *lr ));
  78 static void merge_error_info LDAP_P(( LDAP *ld, LDAPRequest *parentr, LDAPRequest *lr ));
  79 static LDAPMessage * chkResponseList LDAP_P(( LDAP *ld, int msgid, int all));
  80
  81 #define LDAP_MSG_X_KEEP_LOOKING         (-2)
  82
  83
  84 /*
  85  * ldap_result - wait for an ldap result response to a message from the
  86  * ldap server.  If msgid is LDAP_RES_ANY (-1), any message will be
  87  * accepted.  If msgid is LDAP_RES_UNSOLICITED (0), any unsolicited
  88  * message is accepted.  Otherwise ldap_result will wait for a response
  89  * with msgid.  If all is LDAP_MSG_ONE (0) the first message with id
  90  * msgid will be accepted, otherwise, ldap_result will wait for all
  91  * responses with id msgid and then return a pointer to the entire list
  92  * of messages.  In general, this is only useful for search responses,
  93  * which can be of three message types (zero or more entries, zero or
  94  * search references, followed by an ldap result).  An extension to
  95  * LDAPv3 allows partial extended responses to be returned in response
  96  * to any request.  The type of the first message received is returned.
  97  * When waiting, any messages that have been abandoned are discarded.
  98  *
  99  * Example:
 100  *      ldap_result( s, msgid, all, timeout, result )
 101  */
 102 int
 103 ldap_result(
 104         LDAP *ld,
 105         int msgid,
 106         int all,
 107         struct timeval *timeout,
 108         LDAPMessage **result )
 109 {
 110         LDAPMessage     *lm;
 111         int     rc;
 112
 113         assert( ld != NULL );
 114         assert( result != NULL );
 115
 116         Debug( LDAP_DEBUG_TRACE, "ldap_result ld %p msgid %d\n", (void *)ld, msgid, 0 );
 117
 118 #ifdef LDAP_R_COMPILE
 119         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 120 #endif
 121         lm = chkResponseList(ld, msgid, all);
 122
 123         if ( lm == NULL ) {
 124                 rc = wait4msg( ld, msgid, all, timeout, result );
 125         } else {
 126                 *result = lm;
 127                 ld->ld_errno = LDAP_SUCCESS;
 128                 rc = lm->lm_msgtype;
 129         }
 130 #ifdef LDAP_R_COMPILE
 131         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 132 #endif
 133         return( rc );
 134 }
 135
 136 static LDAPMessage *
 137 chkResponseList(
 138         LDAP *ld,
 139         int msgid,
 140         int all)
 141 {
 142         LDAPMessage     *lm, **lastlm, *nextlm;
 143     /*
 144          * Look through the list of responses we have received on
 145          * this association and see if the response we're interested in
 146          * is there.  If it is, return it.  If not, call wait4msg() to
 147          * wait until it arrives or timeout occurs.
 148          */
 149
 150         Debug( LDAP_DEBUG_TRACE,
 151                 "ldap_chkResponseList ld %p msgid %d all %d\n",
 152                 (void *)ld, msgid, all );
 153         lastlm = &ld->ld_responses;
 154         for ( lm = ld->ld_responses; lm != NULL; lm = nextlm ) {
 155                 nextlm = lm->lm_next;
 156
 157                 if ( ldap_abandoned( ld, lm->lm_msgid ) ) {
 158                         Debug( LDAP_DEBUG_TRACE,
 159                                 "ldap_chkResponseList msg abandoned, msgid %d\n",
 160                             msgid, 0, 0 );
 161                         ldap_mark_abandoned( ld, lm->lm_msgid );
 162
 163                         /* Remove this entry from list */
 164                         *lastlm = nextlm;
 165
 166                         ldap_msgfree( lm );
 167
 168                         continue;
 169                 }
 170
 171                 if ( msgid == LDAP_RES_ANY || lm->lm_msgid == msgid ) {
 172                         LDAPMessage     *tmp;
 173
 174                         if ( all == LDAP_MSG_ONE || all == LDAP_MSG_RECEIVED ||
 175                                 msgid == LDAP_RES_UNSOLICITED ) {
 176                                 break;
 177                         }
 178
 179                         tmp = lm->lm_chain_tail;
 180                         if ((tmp->lm_msgtype == LDAP_RES_SEARCH_ENTRY) ||
 181                                 (tmp->lm_msgtype == LDAP_RES_SEARCH_REFERENCE) ||
 182                                 (tmp->lm_msgtype == LDAP_RES_INTERMEDIATE)) {
 183                                 tmp = NULL;
 184                         }
 185
 186                         if ( tmp == NULL ) {
 187                                 lm = NULL;
 188                         }
 189
 190                         break;
 191                 }
 192                 lastlm = &lm->lm_next;
 193         }
 194
 195     if ( lm != NULL ) {
 196                 /* Found an entry, remove it from the list */
 197             if ( all == LDAP_MSG_ONE && lm->lm_chain != NULL ) {
 198                         *lastlm = lm->lm_chain;
 199                         lm->lm_chain->lm_next = lm->lm_next;
 200                         lm->lm_chain->lm_chain_tail = ( lm->lm_chain_tail != lm ) ? lm->lm_chain_tail : lm->lm_chain;
 201                         lm->lm_chain = NULL;
 202                         lm->lm_chain_tail = NULL;
 203             } else {
 204                         *lastlm = lm->lm_next;
 205                 }
 206             lm->lm_next = NULL;
 207     }
 208
 209 #ifdef LDAP_DEBUG
 210         if( lm == NULL) {
 211                 Debug( LDAP_DEBUG_TRACE,
 212                         "ldap_chkResponseList returns ld %p NULL\n", (void *)ld, 0, 0);
 213         } else {
 214                 Debug( LDAP_DEBUG_TRACE,
 215                         "ldap_chkResponseList returns ld %p msgid %d, type 0x%02lu\n",
 216                         (void *)ld, lm->lm_msgid, (unsigned long) lm->lm_msgtype);
 217         }
 218 #endif
 219     return lm;
 220 }
 221
 222 static int
 223 wait4msg(
 224         LDAP *ld,
 225         ber_int_t msgid,
 226         int all,
 227         struct timeval *timeout,
 228         LDAPMessage **result )
 229 {
 230         int             rc;
 231         struct timeval  tv = { 0 },
 232                         tv0 = { 0 },
 233                         *tvp;
 234         time_t          start_time = 0;
 235         time_t          tmp_time;
 236         LDAPConn        *lc, *nextlc;
 237
 238         assert( ld != NULL );
 239         assert( result != NULL );
 240
 241 #ifdef LDAP_DEBUG
 242         if ( timeout == NULL ) {
 243                 Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (infinite timeout)\n",
 244                         (void *)ld, msgid, 0 );
 245         } else {
 246                 Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (timeout %ld usec)\n",
 247                         (void *)ld, msgid, (long)timeout->tv_sec * 1000000 + timeout->tv_usec );
 248         }
 249 #endif /* LDAP_DEBUG */
 250
 251         if ( timeout == NULL ) {
 252                 tvp = NULL;
 253         } else {
 254                 tv0 = *timeout;
 255                 tv = *timeout;
 256                 tvp = &tv;
 257                 start_time = time( NULL );
 258         }
 259
 260         rc = LDAP_MSG_X_KEEP_LOOKING;
 261         while ( rc == LDAP_MSG_X_KEEP_LOOKING ) {
 262 #ifdef LDAP_DEBUG
 263                 if ( ldap_debug & LDAP_DEBUG_TRACE ) {
 264                         Debug( LDAP_DEBUG_TRACE, "wait4msg continue ld %p msgid %d all %d\n",
 265                                 (void *)ld, msgid, all );
 266                         ldap_dump_connection( ld, ld->ld_conns, 1 );
 267                         ldap_dump_requests_and_responses( ld );
 268                 }
 269 #endif /* LDAP_DEBUG */
 270
 271                 if ( (*result = chkResponseList(ld, msgid, all)) != NULL ) {
 272                         rc = (*result)->lm_msgtype;
 273
 274                 } else {
 275                         int lc_ready = 0;
 276
 277 #ifdef LDAP_R_COMPILE
 278                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 279 #endif
 280                         for ( lc = ld->ld_conns; lc != NULL; lc = nextlc ) {
 281                                 nextlc = lc->lconn_next;
 282                                 if ( ber_sockbuf_ctrl( lc->lconn_sb,
 283                                                 LBER_SB_OPT_DATA_READY, NULL ) ) {
 284 #ifdef LDAP_R_COMPILE
 285                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 286 #endif
 287                                         rc = try_read1msg( ld, msgid, all, lc->lconn_sb,
 288                                                 &lc, result );
 289 #ifdef LDAP_R_COMPILE
 290                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 291 #endif
 292                                         lc_ready = 1;
 293                                         break;
 294                                 }
 295                         }
 296 #ifdef LDAP_R_COMPILE
 297                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 298 #endif
 299
 300                         if ( !lc_ready ) {
 301                                 rc = ldap_int_select( ld, tvp );
 302 #ifdef LDAP_DEBUG
 303                                 if ( rc == -1 ) {
 304                                         Debug( LDAP_DEBUG_TRACE,
 305                                                 "ldap_int_select returned -1: errno %d\n",
 306                                                 errno, 0, 0 );
 307                                 }
 308 #endif
 309
 310                                 if ( rc == 0 || ( rc == -1 && (
 311                                         !LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART)
 312                                                 || errno != EINTR )))
 313                                 {
 314                                         ld->ld_errno = (rc == -1 ? LDAP_SERVER_DOWN :
 315                                                 LDAP_TIMEOUT);
 316                                         return( rc );
 317                                 }
 318
 319                                 if ( rc == -1 ) {
 320                                         rc = LDAP_MSG_X_KEEP_LOOKING;   /* select interrupted: loop */
 321                                 } else {
 322                                         rc = LDAP_MSG_X_KEEP_LOOKING;
 323 #ifdef LDAP_R_COMPILE
 324                                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 325 #endif
 326                                         if ( ld->ld_requests &&
 327                                                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 328                                                 ldap_is_write_ready( ld,
 329                                                         ld->ld_requests->lr_conn->lconn_sb ) )
 330                                         {
 331                                                 ldap_int_flush_request( ld, ld->ld_requests );
 332                                         }
 333 #ifdef LDAP_R_COMPILE
 334                                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 335                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 336 #endif
 337                                         for ( lc = ld->ld_conns; rc == LDAP_MSG_X_KEEP_LOOKING && lc != NULL;
 338                                                 lc = nextlc )
 339                                         {
 340                                                 nextlc = lc->lconn_next;
 341                                                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED &&
 342                                                         ldap_is_read_ready( ld, lc->lconn_sb ))
 343                                                 {
 344 #ifdef LDAP_R_COMPILE
 345                                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 346 #endif
 347                                                         rc = try_read1msg( ld, msgid, all,
 348                                                                 lc->lconn_sb, &lc, result );
 349                                                                 if ( lc == NULL ) lc = nextlc;
 350 #ifdef LDAP_R_COMPILE
 351                                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 352 #endif
 353                                                 }
 354                                         }
 355 #ifdef LDAP_R_COMPILE
 356                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 357 #endif
 358                                 }
 359                         }
 360                 }
 361
 362                 if ( rc == LDAP_MSG_X_KEEP_LOOKING && tvp != NULL ) {
 363                         tmp_time = time( NULL );
 364                         tv0.tv_sec -= ( tmp_time - start_time );
 365                         if ( tv0.tv_sec <= 0 ) {
 366                                 rc = 0; /* timed out */
 367                                 ld->ld_errno = LDAP_TIMEOUT;
 368                                 break;
 369                         }
 370                         tv.tv_sec = tv0.tv_sec;
 371
 372                         Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p %ld secs to go\n",
 373                                 (void *)ld, (long) tv.tv_sec, 0 );
 374                         start_time = tmp_time;
 375                 }
 376         }
 377
 378         return( rc );
 379 }
 380
 381
 382 static ber_tag_t
 383 try_read1msg(
 384         LDAP *ld,
 385         ber_int_t msgid,
 386         int all,
 387         Sockbuf *sb,
 388         LDAPConn **lcp,
 389         LDAPMessage **result )
 390 {
 391         BerElement      *ber;
 392         LDAPMessage     *newmsg, *l, *prev;
 393         ber_int_t       id;
 394         ber_tag_t       tag;
 395         ber_len_t       len;
 396         int             foundit = 0;
 397         LDAPRequest     *lr, *tmplr;
 398         LDAPConn        *lc;
 399         BerElement      tmpber;
 400         int             rc, refer_cnt, hadref, simple_request;
 401         ber_int_t       lderr;
 402
 403 #ifdef LDAP_CONNECTIONLESS
 404         LDAPMessage     *tmp = NULL, *chain_head = NULL;
 405         int             moremsgs = 0, isv2 = 0;
 406 #endif
 407
 408         /*
 409          * v3ref = flag for V3 referral / search reference
 410          * 0 = not a ref, 1 = sucessfully chased ref, -1 = pass ref to application
 411          */
 412         enum {
 413                 V3REF_NOREF     = 0,
 414                 V3REF_SUCCESS   = 1,
 415                 V3REF_TOAPP     = -1
 416         }       v3ref;
 417
 418         assert( ld != NULL );
 419         assert( lcp != NULL );
 420         assert( *lcp != NULL );
 421
 422         Debug( LDAP_DEBUG_TRACE, "read1msg: ld %p msgid %d all %d\n",
 423                 (void *)ld, msgid, all );
 424
 425         lc = *lcp;
 426
 427 retry:
 428         if ( lc->lconn_ber == NULL ) {
 429                 lc->lconn_ber = ldap_alloc_ber_with_options(ld);
 430
 431                 if( lc->lconn_ber == NULL ) {
 432                         return -1;
 433                 }
 434         }
 435
 436         ber = lc->lconn_ber;
 437         assert( LBER_VALID (ber) );
 438
 439         /* get the next message */
 440         errno = 0;
 441 #ifdef LDAP_CONNECTIONLESS
 442         if ( LDAP_IS_UDP(ld) ) {
 443                 struct sockaddr from;
 444                 ber_int_sb_read(sb, &from, sizeof(struct sockaddr));
 445                 if (ld->ld_options.ldo_version == LDAP_VERSION2) isv2=1;
 446         }
 447 nextresp3:
 448 #endif
 449         tag = ber_get_next( sb, &len, ber );
 450         if ( tag == LDAP_TAG_MESSAGE ) {
 451                 /*
 452                  * We read a complete message.
 453                  * The connection should no longer need this ber.
 454                  */
 455                 lc->lconn_ber = NULL;
 456         }
 457         if ( tag != LDAP_TAG_MESSAGE ) {
 458                 if ( tag == LBER_DEFAULT) {
 459 #ifdef LDAP_DEBUG
 460                         Debug( LDAP_DEBUG_CONNS,
 461                                 "ber_get_next failed.\n", 0, 0, 0 );
 462 #endif
 463 #ifdef EWOULDBLOCK
 464                         if (errno==EWOULDBLOCK) return LDAP_MSG_X_KEEP_LOOKING;
 465 #endif
 466 #ifdef EAGAIN
 467                         if (errno == EAGAIN) return LDAP_MSG_X_KEEP_LOOKING;
 468 #endif
 469                         ld->ld_errno = LDAP_SERVER_DOWN;
 470                         return -1;
 471                 }
 472                 ld->ld_errno = LDAP_LOCAL_ERROR;
 473                 return -1;
 474         }
 475
 476         /* message id */
 477         if ( ber_get_int( ber, &id ) == LBER_ERROR ) {
 478                 ber_free( ber, 1 );
 479                 ld->ld_errno = LDAP_DECODING_ERROR;
 480                 return( -1 );
 481         }
 482
 483         /* if it's been abandoned, toss it */
 484         if ( ldap_abandoned( ld, id ) ) {
 485                 Debug( LDAP_DEBUG_ANY, "abandoned ld %p msgid %ld\n",
 486                         (void *)ld, (long) id, 0);
 487 retry_ber:
 488                 ber_free( ber, 1 );
 489                 if ( ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
 490                         goto retry;
 491                 }
 492                 return( LDAP_MSG_X_KEEP_LOOKING );      /* continue looking */
 493         }
 494
 495         lr = ldap_find_request_by_msgid( ld, id );
 496         if ( lr == NULL ) {
 497                 Debug( LDAP_DEBUG_ANY,
 498                         "no request for response on ld %p msgid %ld (tossing)\n",
 499                         (void *)ld, (long) id, 0 );
 500                 goto retry_ber;
 501         }
 502 #ifdef LDAP_CONNECTIONLESS
 503         if (LDAP_IS_UDP(ld) && isv2) {
 504                 ber_scanf(ber, "x{");
 505         }
 506 nextresp2:
 507 #endif
 508         /* the message type */
 509         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
 510                 ld->ld_errno = LDAP_DECODING_ERROR;
 511                 ber_free( ber, 1 );
 512                 return( -1 );
 513         }
 514
 515         Debug( LDAP_DEBUG_TRACE,
 516                 "read1msg: ld %p msgid %ld message type %s\n",
 517                 (void *)ld, (long) lr->lr_msgid, ldap_int_msgtype2str( tag ));
 518
 519         id = lr->lr_origid;
 520         refer_cnt = 0;
 521         hadref = simple_request = 0;
 522         rc = LDAP_MSG_X_KEEP_LOOKING;   /* default is to keep looking (no response found) */
 523         lr->lr_res_msgtype = tag;
 524
 525         /*
 526          * This code figures out if we are going to chase a
 527          * referral / search reference, or pass it back to the application
 528          */
 529         v3ref = V3REF_NOREF;    /* Assume not a V3 search reference/referral */
 530         if( (tag != LDAP_RES_SEARCH_ENTRY) && (ld->ld_version > LDAP_VERSION2) ) {
 531                 BerElement      tmpber = *ber;  /* struct copy */
 532                 char **refs = NULL;
 533
 534                 if( tag == LDAP_RES_SEARCH_REFERENCE ) {
 535                         /* This is a V3 search reference */
 536                         /* Assume we do not chase the reference,
 537                          * but pass it to application */
 538                         v3ref = V3REF_TOAPP;
 539                         if( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ||
 540                                         (lr->lr_parent != NULL) )
 541                         {
 542                                 /* Get the referral list */
 543                                 if ( ber_scanf( &tmpber, "{v}", &refs ) == LBER_ERROR ) {
 544                                         rc = LDAP_DECODING_ERROR;
 545                                 } else {
 546                                         /* Note: refs array is freed by ldap_chase_v3referrals */
 547                                         refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
 548                                             1, &lr->lr_res_error, &hadref );
 549                                         if ( refer_cnt > 0 ) {
 550                                                 /* sucessfully chased reference */
 551                                                 /* If haven't got end search, set chasing referrals */
 552                                                 if( lr->lr_status != LDAP_REQST_COMPLETED) {
 553                                                         lr->lr_status = LDAP_REQST_CHASINGREFS;
 554                                                         Debug( LDAP_DEBUG_TRACE,
 555                                                                 "read1msg:  search ref chased, "
 556                                                                 "mark request chasing refs, "
 557                                                                 "id = %d\n",
 558                                                                 lr->lr_msgid, 0, 0);
 559                                                 }
 560
 561                                                 /* We sucessfully chased the reference */
 562                                                 v3ref = V3REF_SUCCESS;
 563                                         }
 564                                 }
 565                         }
 566                 } else {
 567                         /* Check for V3 referral */
 568                         ber_len_t       len;
 569                         char            *lr_res_error = NULL;
 570
 571                         if ( ber_scanf( &tmpber, "{eAA",/*}*/ &lderr,
 572                                     &lr->lr_res_matched, &lr_res_error )
 573                                     != LBER_ERROR )
 574                         {
 575                                 if ( lr_res_error != NULL ) {
 576                                         {
 577                                                 if ( lr->lr_res_error != NULL ) {
 578                                                         (void)ldap_append_referral( ld, &lr->lr_res_error, lr_res_error );
 579                                                         LDAP_FREE( (char *)lr_res_error );
 580
 581                                                 } else {
 582                                                         lr->lr_res_error = lr_res_error;
 583                                                 }
 584                                         }
 585                                         lr_res_error = NULL;
 586                                 }
 587
 588                                 /* Check if V3 referral */
 589                                 if ( ber_peek_tag( &tmpber, &len ) == LDAP_TAG_REFERRAL ) {
 590                                         /* We have a V3 referral, assume we cannot chase it */
 591                                         v3ref = V3REF_TOAPP;
 592                                         if( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS)
 593                                                          || (lr->lr_parent != NULL) )
 594                                         {
 595                                                 /* Assume referral not chased and return it to app */
 596                                                 v3ref = V3REF_TOAPP;
 597
 598                                                 /* Get the referral list */
 599                                                 if( ber_scanf( &tmpber, "{v}", &refs) == LBER_ERROR) {
 600                                                         rc = LDAP_DECODING_ERROR;
 601                                                         lr->lr_status = LDAP_REQST_COMPLETED;
 602                                                         Debug( LDAP_DEBUG_TRACE,
 603                                                                 "read1msg: referral decode error, mark request completed, ld %p msgid %d\n",
 604                                                                 (void *)ld, lr->lr_msgid, 0);
 605                                                 } else {
 606                                                         /* Chase the referral
 607                                                          * Note: refs arrary is freed by ldap_chase_v3referrals
 608                                                          */
 609                                                         refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
 610                                                             0, &lr->lr_res_error, &hadref );
 611                                                         lr->lr_status = LDAP_REQST_COMPLETED;
 612                                                         Debug( LDAP_DEBUG_TRACE,
 613                                                                 "read1msg: referral chased, mark request completed, ld %p msgid %d\n",
 614                                                                 (void *)ld, lr->lr_msgid, 0);
 615                                                         if( refer_cnt > 0) {
 616                                                                 /* Referral successfully chased */
 617                                                                 v3ref = V3REF_SUCCESS;
 618                                                         }
 619                                                 }
 620                                         }
 621                                 }
 622
 623                                 if( lr->lr_res_matched != NULL ) {
 624                                         LDAP_FREE( lr->lr_res_matched );
 625                                         lr->lr_res_matched = NULL;
 626                                 }
 627                                 if( lr->lr_res_error != NULL ) {
 628                                         LDAP_FREE( lr->lr_res_error );
 629                                         lr->lr_res_error = NULL;
 630                                 }
 631                         }
 632                 }
 633         }
 634
 635         /* All results that just return a status, i.e. don't return data
 636          * go through the following code.  This code also chases V2 referrals
 637          * and checks if all referrals have been chased.
 638          */
 639         if ( (tag != LDAP_RES_SEARCH_ENTRY) && (v3ref != V3REF_TOAPP) &&
 640                 (tag != LDAP_RES_INTERMEDIATE ))
 641         {
 642                 /* For a v3 search referral/reference, only come here if already chased it */
 643                 if ( ld->ld_version >= LDAP_VERSION2 &&
 644                         ( lr->lr_parent != NULL ||
 645                         LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ) )
 646                 {
 647                         char            *lr_res_error = NULL;
 648
 649                         tmpber = *ber;  /* struct copy */
 650                         if ( v3ref == V3REF_SUCCESS ) {
 651                                 /* V3 search reference or V3 referral
 652                                  * sucessfully chased. If this message
 653                                  * is a search result, then it has no more
 654                                  * outstanding referrals.
 655                                  */
 656                                 if ( tag == LDAP_RES_SEARCH_RESULT )
 657                                         refer_cnt = 0;
 658                         } else if ( ber_scanf( &tmpber, "{eAA}", &lderr,
 659                                 &lr->lr_res_matched, &lr_res_error )
 660                                 != LBER_ERROR )
 661                         {
 662                                 if ( lr_res_error != NULL ) {
 663                                         {
 664                                                 if ( lr->lr_res_error != NULL ) {
 665                                                         (void)ldap_append_referral( ld, &lr->lr_res_error, lr_res_error );
 666                                                         LDAP_FREE( (char *)lr_res_error );
 667                                                 } else {
 668                                                         lr->lr_res_error = lr_res_error;
 669                                                 }
 670                                         }
 671                                         lr_res_error = NULL;
 672                                 }
 673
 674                                 switch ( lderr ) {
 675                                 case LDAP_SUCCESS:
 676                                 case LDAP_COMPARE_TRUE:
 677                                 case LDAP_COMPARE_FALSE:
 678                                         break;
 679
 680                                 default:
 681                                         if ( lr->lr_res_error == NULL
 682                                                 || lr->lr_res_error[ 0 ] == '\0' )
 683                                         {
 684                                                 break;
 685                                         }
 686
 687                                         /* referrals are in error string */
 688                                         refer_cnt = ldap_chase_referrals( ld, lr,
 689                                                 &lr->lr_res_error, -1, &hadref );
 690                                         lr->lr_status = LDAP_REQST_COMPLETED;
 691                                         Debug( LDAP_DEBUG_TRACE,
 692                                                 "read1msg:  V2 referral chased, "
 693                                                 "mark request completed, id = %d\n",
 694                                                 lr->lr_msgid, 0, 0 );
 695                                         break;
 696                                 }
 697
 698                                 /* save errno, message, and matched string */
 699                                 if ( !hadref || lr->lr_res_error == NULL ) {
 700                                         lr->lr_res_errno = ( lderr ==
 701                                         LDAP_PARTIAL_RESULTS ) ? LDAP_SUCCESS
 702                                         : lderr;
 703                                 } else if ( ld->ld_errno != LDAP_SUCCESS ) {
 704                                         lr->lr_res_errno = ld->ld_errno;
 705                                 } else {
 706                                         lr->lr_res_errno = LDAP_PARTIAL_RESULTS;
 707                                 }
 708
 709                                 Debug( LDAP_DEBUG_TRACE, "new result:  "
 710                                         "res_errno: %d, "
 711                                         "res_error: <%s>, "
 712                                         "res_matched: <%s>\n",
 713                                         lr->lr_res_errno,
 714                                         lr->lr_res_error ? lr->lr_res_error : "",
 715                                         lr->lr_res_matched ? lr->lr_res_matched : "" );
 716                         }
 717
 718                         /* in any case, don't leave any lr_res_error 'round */
 719                         if ( lr_res_error ) {
 720                                 LDAP_FREE( lr_res_error );
 721                         }
 722                 }
 723
 724                 Debug( LDAP_DEBUG_TRACE,
 725                         "read1msg: ld %p %d new referrals\n",
 726                         (void *)ld, refer_cnt, 0 );
 727
 728                 if ( refer_cnt != 0 ) { /* chasing referrals */
 729                         ber_free( ber, 1 );
 730                         ber = NULL;
 731                         if ( refer_cnt < 0 ) {
 732                                 return( -1 );   /* fatal error */
 733                         }
 734                         lr->lr_res_errno = LDAP_SUCCESS; /* sucessfully chased referral */
 735                 } else {
 736                         if ( lr->lr_outrefcnt <= 0 && lr->lr_parent == NULL ) {
 737                                 /* request without any referrals */
 738                                 simple_request = ( hadref ? 0 : 1 );
 739                         } else {
 740                                 /* request with referrals or child request */
 741                                 ber_free( ber, 1 );
 742                                 ber = NULL;
 743                         }
 744
 745                         lr->lr_status = LDAP_REQST_COMPLETED; /* declare this request done */
 746                         Debug( LDAP_DEBUG_TRACE,
 747                                 "read1msg:  mark request completed, ld %p msgid %d\n",
 748                                 (void *)ld, lr->lr_msgid, 0);
 749                         while ( lr->lr_parent != NULL ) {
 750                                 merge_error_info( ld, lr->lr_parent, lr );
 751
 752                                 lr = lr->lr_parent;
 753                                 if ( --lr->lr_outrefcnt > 0 ) {
 754                                         break;  /* not completely done yet */
 755                                 }
 756                         }
 757
 758                         /* Check if all requests are finished, lr is now parent */
 759                         tmplr = lr;
 760                         if (tmplr->lr_status == LDAP_REQST_COMPLETED) {
 761                                 for ( tmplr=lr->lr_child;
 762                                         tmplr != NULL;
 763                                         tmplr=tmplr->lr_refnext)
 764                                 {
 765                                         if( tmplr->lr_status != LDAP_REQST_COMPLETED) break;
 766                                 }
 767                         }
 768
 769                         /* This is the parent request if the request has referrals */
 770                         if ( lr->lr_outrefcnt <= 0 && lr->lr_parent == NULL &&
 771                                 tmplr == NULL )
 772                         {
 773                                 id = lr->lr_msgid;
 774                                 tag = lr->lr_res_msgtype;
 775                                 Debug( LDAP_DEBUG_ANY, "request done: ld %p msgid %ld\n",
 776                                         (void *)ld, (long) id, 0 );
 777 Debug( LDAP_DEBUG_TRACE,
 778 "res_errno: %d, res_error: <%s>, res_matched: <%s>\n",
 779 lr->lr_res_errno, lr->lr_res_error ? lr->lr_res_error : "",
 780 lr->lr_res_matched ? lr->lr_res_matched : "" );
 781                                 if ( !simple_request ) {
 782                                         ber_free( ber, 1 );
 783                                         ber = NULL;
 784                                         if ( build_result_ber( ld, &ber, lr )
 785                                             == LBER_ERROR ) {
 786                                                 rc = -1; /* fatal error */
 787                                         }
 788                                 }
 789
 790 #ifdef LDAP_R_COMPILE
 791                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 792 #endif
 793                                 ldap_free_request( ld, lr );
 794 #ifdef LDAP_R_COMPILE
 795                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 796 #endif
 797                         }
 798
 799                         if ( lc != NULL ) {
 800 #ifdef LDAP_R_COMPILE
 801                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 802 #endif
 803                                 ldap_free_connection( ld, lc, 0, 1 );
 804 #ifdef LDAP_R_COMPILE
 805                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 806 #endif
 807                                 *lcp = NULL;
 808                         }
 809                 }
 810         }
 811
 812         if ( ber == NULL ) {
 813                 return( rc );
 814         }
 815
 816         /* make a new ldap message */
 817         newmsg = (LDAPMessage *) LDAP_CALLOC( 1, sizeof(LDAPMessage) );
 818         if ( newmsg == NULL ) {
 819                 ld->ld_errno = LDAP_NO_MEMORY;
 820                 return( -1 );
 821         }
 822         newmsg->lm_msgid = (int)id;
 823         newmsg->lm_msgtype = tag;
 824         newmsg->lm_ber = ber;
 825         newmsg->lm_chain_tail = newmsg;
 826
 827 #ifdef LDAP_CONNECTIONLESS
 828         /* CLDAP replies all fit in a single datagram. In LDAPv2 RFC1798
 829          * the responses are all a sequence wrapped in one message. In
 830          * LDAPv3 each response is in its own message. The datagram must
 831          * end with a SearchResult. We can't just parse each response in
 832          * separate calls to try_read1msg because the header info is only
 833          * present at the beginning of the datagram, not at the beginning
 834          * of each response. So parse all the responses at once and queue
 835          * them up, then pull off the first response to return to the
 836          * caller when all parsing is complete.
 837          */
 838         if ( LDAP_IS_UDP(ld) ) {
 839                 /* If not a result, look for more */
 840                 if ( tag != LDAP_RES_SEARCH_RESULT ) {
 841                         int ok = 0;
 842                         moremsgs = 1;
 843                         if (isv2) {
 844                                 /* LDAPv2: dup the current ber, skip past the current
 845                                  * response, and see if there are any more after it.
 846                                  */
 847                                 ber = ber_dup( ber );
 848                                 ber_scanf( ber, "x" );
 849                                 if (ber_peek_tag(ber, &len) != LBER_DEFAULT) {
 850                                         /* There's more - dup the ber buffer so they can all be
 851                                          * individually freed by ldap_msgfree.
 852                                          */
 853                                         struct berval bv;
 854                                         ber_get_option(ber, LBER_OPT_BER_REMAINING_BYTES, &len);
 855                                         bv.bv_val = LDAP_MALLOC(len);
 856                                         if (bv.bv_val) {
 857                                                 ok=1;
 858                                                 ber_read(ber, bv.bv_val, len);
 859                                                 bv.bv_len = len;
 860                                                 ber_init2(ber, &bv, ld->ld_lberoptions );
 861                                         }
 862                                 }
 863                         } else {
 864                                 /* LDAPv3: Just allocate a new ber. Since this is a buffered
 865                                  * datagram, if the sockbuf is readable we still have data
 866                                  * to parse.
 867                                  */
 868                                 ber = ldap_alloc_ber_with_options(ld);
 869                                 if (ber_sockbuf_ctrl(sb, LBER_SB_OPT_DATA_READY, NULL)) ok=1;
 870                         }
 871                         /* set up response chain */
 872                         if ( tmp == NULL ) {
 873                                 newmsg->lm_next = ld->ld_responses;
 874                                 ld->ld_responses = newmsg;
 875                                 chain_head = newmsg;
 876                         } else {
 877                                 tmp->lm_chain = newmsg;
 878                         }
 879                         chain_head->lm_chain_tail = newmsg;
 880                         tmp = newmsg;
 881                         /* "ok" means there's more to parse */
 882                         if (ok) {
 883                                 if (isv2) goto nextresp2;
 884                                 else goto nextresp3;
 885                         } else {
 886                                 /* got to end of datagram without a SearchResult. Free
 887                                  * our dup'd ber, but leave any buffer alone. For v2 case,
 888                                  * the previous response is still using this buffer. For v3,
 889                                  * the new ber has no buffer to free yet.
 890                                  */
 891                                 ber_free(ber, 0);
 892                                 return -1;
 893                         }
 894                 } else if ( moremsgs ) {
 895                 /* got search result, and we had multiple responses in 1 datagram.
 896                  * stick the result onto the end of the chain, and then pull the
 897                  * first response off the head of the chain.
 898                  */
 899                         tmp->lm_chain = newmsg;
 900                         chain_head->lm_chain_tail = newmsg;
 901                         *result = chkResponseList( ld, msgid, all );
 902                         ld->ld_errno = LDAP_SUCCESS;
 903                         return( (*result)->lm_msgtype );
 904                 }
 905         }
 906 #endif /* LDAP_CONNECTIONLESS */
 907
 908         /* is this the one we're looking for? */
 909         if ( msgid == LDAP_RES_ANY || id == msgid ) {
 910                 if ( all == LDAP_MSG_ONE
 911                     || (newmsg->lm_msgtype != LDAP_RES_SEARCH_RESULT
 912                     && newmsg->lm_msgtype != LDAP_RES_SEARCH_ENTRY
 913                     && newmsg->lm_msgtype != LDAP_RES_SEARCH_REFERENCE) ) {
 914                         *result = newmsg;
 915                         ld->ld_errno = LDAP_SUCCESS;
 916                         return( tag );
 917                 } else if ( newmsg->lm_msgtype == LDAP_RES_SEARCH_RESULT) {
 918                         foundit = 1;    /* return the chain later */
 919                 }
 920         }
 921
 922         /*
 923          * if not, we must add it to the list of responses.  if
 924          * the msgid is already there, it must be part of an existing
 925          * search response.
 926          */
 927
 928         prev = NULL;
 929         for ( l = ld->ld_responses; l != NULL; l = l->lm_next ) {
 930                 if ( l->lm_msgid == newmsg->lm_msgid )
 931                         break;
 932                 prev = l;
 933         }
 934
 935         /* not part of an existing search response */
 936         if ( l == NULL ) {
 937                 if ( foundit ) {
 938                         *result = newmsg;
 939                         goto exit;
 940                 }
 941
 942                 newmsg->lm_next = ld->ld_responses;
 943                 ld->ld_responses = newmsg;
 944                 goto exit;
 945         }
 946
 947         Debug( LDAP_DEBUG_TRACE, "adding response ld %p msgid %ld type %ld:\n",
 948                 (void *)ld, (long) newmsg->lm_msgid, (long) newmsg->lm_msgtype );
 949
 950         /* part of a search response - add to end of list of entries */
 951         l->lm_chain_tail->lm_chain = newmsg;
 952         l->lm_chain_tail = newmsg;
 953
 954         /* return the whole chain if that's what we were looking for */
 955         if ( foundit ) {
 956                 if ( prev == NULL )
 957                         ld->ld_responses = l->lm_next;
 958                 else
 959                         prev->lm_next = l->lm_next;
 960                 *result = l;
 961         }
 962
 963 exit:
 964         if ( foundit ) {
 965                 ld->ld_errno = LDAP_SUCCESS;
 966                 return( tag );
 967         }
 968         if ( ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
 969                 goto retry;
 970         }
 971         return( LDAP_MSG_X_KEEP_LOOKING );      /* continue looking */
 972 }
 973
 974
 975 static ber_tag_t
 976 build_result_ber( LDAP *ld, BerElement **bp, LDAPRequest *lr )
 977 {
 978         ber_len_t       len;
 979         ber_tag_t       tag;
 980         ber_int_t       along;
 981         BerElement *ber;
 982
 983         *bp = NULL;
 984         ber = ldap_alloc_ber_with_options( ld );
 985
 986         if( ber == NULL ) {
 987                 ld->ld_errno = LDAP_NO_MEMORY;
 988                 return LBER_ERROR;
 989         }
 990
 991         if ( ber_printf( ber, "{it{ess}}", lr->lr_msgid,
 992                 lr->lr_res_msgtype, lr->lr_res_errno,
 993                 lr->lr_res_matched ? lr->lr_res_matched : "",
 994                 lr->lr_res_error ? lr->lr_res_error : "" ) == -1 )
 995         {
 996                 ld->ld_errno = LDAP_ENCODING_ERROR;
 997                 ber_free(ber, 1);
 998                 return( LBER_ERROR );
 999         }
1000
1001         ber_reset( ber, 1 );
1002
1003         if ( ber_skip_tag( ber, &len ) == LBER_ERROR ) {
1004                 ld->ld_errno = LDAP_DECODING_ERROR;
1005                 ber_free(ber, 1);
1006                 return( LBER_ERROR );
1007         }
1008
1009         if ( ber_get_enum( ber, &along ) == LBER_ERROR ) {
1010                 ld->ld_errno = LDAP_DECODING_ERROR;
1011                 ber_free(ber, 1);
1012                 return( LBER_ERROR );
1013         }
1014
1015         tag = ber_peek_tag( ber, &len );
1016
1017         if ( tag == LBER_ERROR ) {
1018                 ld->ld_errno = LDAP_DECODING_ERROR;
1019                 ber_free(ber, 1);
1020                 return( LBER_ERROR );
1021         }
1022
1023         *bp = ber;
1024         return tag;
1025 }
1026
1027
1028 static void
1029 merge_error_info( LDAP *ld, LDAPRequest *parentr, LDAPRequest *lr )
1030 {
1031 /*
1032  * Merge error information in "lr" with "parentr" error code and string.
1033  */
1034         if ( lr->lr_res_errno == LDAP_PARTIAL_RESULTS ) {
1035                 parentr->lr_res_errno = lr->lr_res_errno;
1036                 if ( lr->lr_res_error != NULL ) {
1037                         (void)ldap_append_referral( ld, &parentr->lr_res_error,
1038                             lr->lr_res_error );
1039                 }
1040         } else if ( lr->lr_res_errno != LDAP_SUCCESS &&
1041                 parentr->lr_res_errno == LDAP_SUCCESS )
1042         {
1043                 parentr->lr_res_errno = lr->lr_res_errno;
1044                 if ( parentr->lr_res_error != NULL ) {
1045                         LDAP_FREE( parentr->lr_res_error );
1046                 }
1047                 parentr->lr_res_error = lr->lr_res_error;
1048                 lr->lr_res_error = NULL;
1049                 if ( LDAP_NAME_ERROR( lr->lr_res_errno ) ) {
1050                         if ( parentr->lr_res_matched != NULL ) {
1051                                 LDAP_FREE( parentr->lr_res_matched );
1052                         }
1053                         parentr->lr_res_matched = lr->lr_res_matched;
1054                         lr->lr_res_matched = NULL;
1055                 }
1056         }
1057
1058         Debug( LDAP_DEBUG_TRACE, "merged parent (id %d) error info:  ",
1059             parentr->lr_msgid, 0, 0 );
1060         Debug( LDAP_DEBUG_TRACE, "result errno %d, error <%s>, matched <%s>\n",
1061             parentr->lr_res_errno, parentr->lr_res_error ?
1062             parentr->lr_res_error : "", parentr->lr_res_matched ?
1063             parentr->lr_res_matched : "" );
1064 }
1065
1066
1067
1068 int
1069 ldap_msgtype( LDAPMessage *lm )
1070 {
1071         assert( lm != NULL );
1072         return ( lm != NULL ) ? (int)lm->lm_msgtype : -1;
1073 }
1074
1075
1076 int
1077 ldap_msgid( LDAPMessage *lm )
1078 {
1079         assert( lm != NULL );
1080
1081         return ( lm != NULL ) ? lm->lm_msgid : -1;
1082 }
1083
1084
1085 char * ldap_int_msgtype2str( ber_tag_t tag )
1086 {
1087         switch( tag ) {
1088         case LDAP_RES_ADD: return "add";
1089         case LDAP_RES_BIND: return "bind";
1090         case LDAP_RES_COMPARE: return "compare";
1091         case LDAP_RES_DELETE: return "delete";
1092         case LDAP_RES_EXTENDED: return "extended-result";
1093         case LDAP_RES_INTERMEDIATE: return "intermediate";
1094         case LDAP_RES_MODIFY: return "modify";
1095         case LDAP_RES_RENAME: return "rename";
1096         case LDAP_RES_SEARCH_ENTRY: return "search-entry";
1097         case LDAP_RES_SEARCH_REFERENCE: return "search-reference";
1098         case LDAP_RES_SEARCH_RESULT: return "search-result";
1099         }
1100         return "unknown";
1101 }
1102
1103 int
1104 ldap_msgfree( LDAPMessage *lm )
1105 {
1106         LDAPMessage     *next;
1107         int             type = 0;
1108
1109         Debug( LDAP_DEBUG_TRACE, "ldap_msgfree\n", 0, 0, 0 );
1110
1111         for ( ; lm != NULL; lm = next ) {
1112                 next = lm->lm_chain;
1113                 type = lm->lm_msgtype;
1114                 ber_free( lm->lm_ber, 1 );
1115                 LDAP_FREE( (char *) lm );
1116         }
1117
1118         return( type );
1119 }
1120
1121 /*
1122  * ldap_msgdelete - delete a message.  It returns:
1123  *      0       if the entire message was deleted
1124  *      -1      if the message was not found, or only part of it was found
1125  */
1126 int
1127 ldap_msgdelete( LDAP *ld, int msgid )
1128 {
1129         LDAPMessage     *lm, *prev;
1130         int rc = 0;
1131
1132         assert( ld != NULL );
1133
1134         Debug( LDAP_DEBUG_TRACE, "ldap_msgdelete\n", 0, 0, 0 );
1135
1136         prev = NULL;
1137 #ifdef LDAP_R_COMPILE
1138         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
1139 #endif
1140         for ( lm = ld->ld_responses; lm != NULL; lm = lm->lm_next ) {
1141                 if ( lm->lm_msgid == msgid )
1142                         break;
1143                 prev = lm;
1144         }
1145
1146         if ( lm == NULL ) {
1147                 rc = -1;
1148         } else {
1149                 if ( prev == NULL )
1150                         ld->ld_responses = lm->lm_next;
1151                 else
1152                         prev->lm_next = lm->lm_next;
1153         }
1154 #ifdef LDAP_R_COMPILE
1155         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
1156 #endif
1157         if ( lm && ldap_msgfree( lm ) == LDAP_RES_SEARCH_ENTRY )
1158                 rc = -1;
1159
1160         return( rc );
1161 }
1162
1163
1164 /*
1165  * return 1 if message msgid is waiting to be abandoned, 0 otherwise
1166  */
1167 static int
1168 ldap_abandoned( LDAP *ld, ber_int_t msgid )
1169 {
1170         int     i;
1171
1172         if ( ld->ld_abandoned == NULL )
1173                 return( 0 );
1174
1175         for ( i = 0; ld->ld_abandoned[i] != -1; i++ )
1176                 if ( ld->ld_abandoned[i] == msgid )
1177                         return( 1 );
1178
1179         return( 0 );
1180 }
1181
1182
1183 static int
1184 ldap_mark_abandoned( LDAP *ld, ber_int_t msgid )
1185 {
1186         int     i;
1187
1188         if ( ld->ld_abandoned == NULL )
1189                 return( -1 );
1190
1191         for ( i = 0; ld->ld_abandoned[i] != -1; i++ )
1192                 if ( ld->ld_abandoned[i] == msgid )
1193                         break;
1194
1195         if ( ld->ld_abandoned[i] == -1 )
1196                 return( -1 );
1197
1198         for ( ; ld->ld_abandoned[i] != -1; i++ ) {
1199                 ld->ld_abandoned[i] = ld->ld_abandoned[i + 1];
1200         }
1201
1202         return( 0 );
1203 }