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 1998-2005 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
  82 /*
  83  * ldap_result - wait for an ldap result response to a message from the
  84  * ldap server.  If msgid is LDAP_RES_ANY (-1), any message will be
  85  * accepted.  If msgid is LDAP_RES_UNSOLICITED (0), any unsolicited
  86  * message is accepted.  Otherwise ldap_result will wait for a response
  87  * with msgid.  If all is LDAP_MSG_ONE (0) the first message with id
  88  * msgid will be accepted, otherwise, ldap_result will wait for all
  89  * responses with id msgid and then return a pointer to the entire list
  90  * of messages.  In general, this is only useful for search responses,
  91  * which can be of three message types (zero or more entries, zero or
  92  * search references, followed by an ldap result).  An extension to
  93  * LDAPv3 allows partial extended responses to be returned in response
  94  * to any request.  The type of the first message received is returned.
  95  * When waiting, any messages that have been abandoned are discarded.
  96  *
  97  * Example:
  98  *      ldap_result( s, msgid, all, timeout, result )
  99  */
 100 int
 101 ldap_result(
 102         LDAP *ld,
 103         int msgid,
 104         int all,
 105         struct timeval *timeout,
 106         LDAPMessage **result )
 107 {
 108         LDAPMessage     *lm;
 109         int     rc;
 110
 111         assert( ld != NULL );
 112         assert( result != NULL );
 113
 114         Debug( LDAP_DEBUG_TRACE, "ldap_result ld %p msgid %d\n", (void *)ld, msgid, 0 );
 115
 116 #ifdef LDAP_R_COMPILE
 117         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 118 #endif
 119         lm = chkResponseList(ld, msgid, all);
 120
 121         if ( lm == NULL ) {
 122                 rc = wait4msg( ld, msgid, all, timeout, result );
 123         } else {
 124                 *result = lm;
 125                 ld->ld_errno = LDAP_SUCCESS;
 126                 rc = lm->lm_msgtype;
 127         }
 128 #ifdef LDAP_R_COMPILE
 129         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 130 #endif
 131         return( rc );
 132 }
 133
 134 static LDAPMessage *
 135 chkResponseList(
 136         LDAP *ld,
 137         int msgid,
 138         int all)
 139 {
 140         LDAPMessage     *lm, **lastlm, *nextlm;
 141     /*
 142          * Look through the list of responses we have received on
 143          * this association and see if the response we're interested in
 144          * is there.  If it is, return it.  If not, call wait4msg() to
 145          * wait until it arrives or timeout occurs.
 146          */
 147
 148         Debug( LDAP_DEBUG_TRACE,
 149                 "ldap_chkResponseList ld %p msgid %d all %d\n",
 150                 (void *)ld, msgid, all );
 151         lastlm = &ld->ld_responses;
 152         for ( lm = ld->ld_responses; lm != NULL; lm = nextlm ) {
 153                 nextlm = lm->lm_next;
 154
 155                 if ( ldap_abandoned( ld, lm->lm_msgid ) ) {
 156                         Debug( LDAP_DEBUG_TRACE,
 157                                 "ldap_chkResponseList msg abandoned, msgid %d\n",
 158                             msgid, 0, 0 );
 159                         ldap_mark_abandoned( ld, lm->lm_msgid );
 160
 161                         /* Remove this entry from list */
 162                         *lastlm = nextlm;
 163
 164                         ldap_msgfree( lm );
 165
 166                         continue;
 167                 }
 168
 169                 if ( msgid == LDAP_RES_ANY || lm->lm_msgid == msgid ) {
 170                         LDAPMessage     *tmp;
 171
 172                         if ( all == LDAP_MSG_ONE || all == LDAP_MSG_RECEIVED ||
 173                                 msgid == LDAP_RES_UNSOLICITED ) {
 174                                 break;
 175                         }
 176
 177                         tmp = lm->lm_chain_tail;
 178                         if ((tmp->lm_msgtype == LDAP_RES_SEARCH_ENTRY) ||
 179                                 (tmp->lm_msgtype == LDAP_RES_SEARCH_REFERENCE) ||
 180                                 (tmp->lm_msgtype == LDAP_RES_INTERMEDIATE)) {
 181                                 tmp = NULL;
 182                         }
 183
 184                         if ( tmp == NULL ) {
 185                                 lm = NULL;
 186                         }
 187
 188                         break;
 189                 }
 190                 lastlm = &lm->lm_next;
 191         }
 192
 193     if ( lm != NULL ) {
 194                 /* Found an entry, remove it from the list */
 195             if ( all == LDAP_MSG_ONE && lm->lm_chain != NULL ) {
 196                         *lastlm = lm->lm_chain;
 197                         lm->lm_chain->lm_next = lm->lm_next;
 198                         lm->lm_chain->lm_chain_tail = ( lm->lm_chain_tail != lm ) ? lm->lm_chain_tail : lm->lm_chain;
 199                         lm->lm_chain = NULL;
 200                         lm->lm_chain_tail = NULL;
 201             } else {
 202                         *lastlm = lm->lm_next;
 203                 }
 204             lm->lm_next = NULL;
 205     }
 206
 207 #ifdef LDAP_DEBUG
 208         if( lm == NULL) {
 209                 Debug( LDAP_DEBUG_TRACE,
 210                         "ldap_chkResponseList returns ld %p NULL\n", (void *)ld, 0, 0);
 211         } else {
 212                 Debug( LDAP_DEBUG_TRACE,
 213                         "ldap_chkResponseList returns ld %p msgid %d, type 0x%02lu\n",
 214                         (void *)ld, lm->lm_msgid, (unsigned long) lm->lm_msgtype);
 215         }
 216 #endif
 217     return lm;
 218 }
 219
 220 static int
 221 wait4msg(
 222         LDAP *ld,
 223         ber_int_t msgid,
 224         int all,
 225         struct timeval *timeout,
 226         LDAPMessage **result )
 227 {
 228         int             rc;
 229         struct timeval  tv = { 0 },
 230                         tv0 = { 0 },
 231                         *tvp;
 232         time_t          start_time = 0;
 233         time_t          tmp_time;
 234         LDAPConn        *lc, *nextlc;
 235
 236         assert( ld != NULL );
 237         assert( result != NULL );
 238
 239 #ifdef LDAP_DEBUG
 240         if ( timeout == NULL ) {
 241                 Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (infinite timeout)\n",
 242                         (void *)ld, msgid, 0 );
 243         } else {
 244                 Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p msgid %d (timeout %ld usec)\n",
 245                         (void *)ld, msgid, (long)timeout->tv_sec * 1000000 + timeout->tv_usec );
 246         }
 247 #endif /* LDAP_DEBUG */
 248
 249         if ( timeout == NULL ) {
 250                 tvp = NULL;
 251         } else {
 252                 tv0 = *timeout;
 253                 tv = *timeout;
 254                 tvp = &tv;
 255                 start_time = time( NULL );
 256         }
 257
 258         rc = -2;
 259         while ( rc == -2 ) {
 260 #ifdef LDAP_DEBUG
 261                 if ( ldap_debug & LDAP_DEBUG_TRACE ) {
 262                         Debug( LDAP_DEBUG_TRACE, "wait4msg continue ld %p msgid %d all %d\n",
 263                                 (void *)ld, msgid, all );
 264                         ldap_dump_connection( ld, ld->ld_conns, 1 );
 265                         ldap_dump_requests_and_responses( ld );
 266                 }
 267 #endif /* LDAP_DEBUG */
 268
 269                 if ( (*result = chkResponseList(ld, msgid, all)) != NULL ) {
 270                         rc = (*result)->lm_msgtype;
 271
 272                 } else {
 273                         int lc_ready = 0;
 274
 275 #ifdef LDAP_R_COMPILE
 276                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 277 #endif
 278                         for ( lc = ld->ld_conns; lc != NULL; lc = nextlc ) {
 279                                 nextlc = lc->lconn_next;
 280                                 if ( ber_sockbuf_ctrl( lc->lconn_sb,
 281                                                 LBER_SB_OPT_DATA_READY, NULL ) ) {
 282 #ifdef LDAP_R_COMPILE
 283                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 284 #endif
 285                                         rc = try_read1msg( ld, msgid, all, lc->lconn_sb,
 286                                                 &lc, result );
 287 #ifdef LDAP_R_COMPILE
 288                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 289 #endif
 290                                         lc_ready = 1;
 291                                         break;
 292                                 }
 293                         }
 294 #ifdef LDAP_R_COMPILE
 295                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 296 #endif
 297
 298                         if ( !lc_ready ) {
 299                                 rc = ldap_int_select( ld, tvp );
 300 #ifdef LDAP_DEBUG
 301                                 if ( rc == -1 ) {
 302                                         Debug( LDAP_DEBUG_TRACE,
 303                                                 "ldap_int_select returned -1: errno %d\n",
 304                                                 errno, 0, 0 );
 305                                 }
 306 #endif
 307
 308                                 if ( rc == 0 || ( rc == -1 && (
 309                                         !LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART)
 310                                                 || errno != EINTR )))
 311                                 {
 312                                         ld->ld_errno = (rc == -1 ? LDAP_SERVER_DOWN :
 313                                                 LDAP_TIMEOUT);
 314                                         return( rc );
 315                                 }
 316
 317                                 if ( rc == -1 ) {
 318                                         rc = -2;        /* select interrupted: loop */
 319                                 } else {
 320                                         rc = -2;
 321 #ifdef LDAP_R_COMPILE
 322                                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 323 #endif
 324                                         if ( ld->ld_requests &&
 325                                                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 326                                                 ldap_is_write_ready( ld,
 327                                                         ld->ld_requests->lr_conn->lconn_sb ) )
 328                                         {
 329                                                 ldap_int_flush_request( ld, ld->ld_requests );
 330                                         }
 331 #ifdef LDAP_R_COMPILE
 332                                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 333                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 334 #endif
 335                                         for ( lc = ld->ld_conns; rc == -2 && lc != NULL;
 336                                                 lc = nextlc )
 337                                         {
 338                                                 nextlc = lc->lconn_next;
 339                                                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED &&
 340                                                         ldap_is_read_ready( ld, lc->lconn_sb ))
 341                                                 {
 342 #ifdef LDAP_R_COMPILE
 343                                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 344 #endif
 345                                                         rc = try_read1msg( ld, msgid, all,
 346                                                                 lc->lconn_sb, &lc, result );
 347                                                                 if ( lc == NULL ) lc = nextlc;
 348 #ifdef LDAP_R_COMPILE
 349                                                         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 350 #endif
 351                                                 }
 352                                         }
 353 #ifdef LDAP_R_COMPILE
 354                                         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 355 #endif
 356                                 }
 357                         }
 358                 }
 359
 360                 if ( rc == -2 && tvp != NULL ) {
 361                         tmp_time = time( NULL );
 362                         tv0.tv_sec -= ( tmp_time - start_time );
 363                         if ( tv0.tv_sec <= 0 ) {
 364                                 rc = 0; /* timed out */
 365                                 ld->ld_errno = LDAP_TIMEOUT;
 366                                 break;
 367                         }
 368                         tv.tv_sec = tv0.tv_sec;
 369
 370                         Debug( LDAP_DEBUG_TRACE, "wait4msg ld %p %ld secs to go\n",
 371                                 (void *)ld, (long) tv.tv_sec, 0 );
 372                         start_time = tmp_time;
 373                 }
 374         }
 375
 376         return( rc );
 377 }
 378
 379
 380 static ber_tag_t
 381 try_read1msg(
 382         LDAP *ld,
 383         ber_int_t msgid,
 384         int all,
 385         Sockbuf *sb,
 386         LDAPConn **lcp,
 387         LDAPMessage **result )
 388 {
 389         BerElement      *ber;
 390         LDAPMessage     *newmsg, *l, *prev;
 391         ber_int_t       id;
 392         ber_tag_t       tag;
 393         ber_len_t       len;
 394         int             foundit = 0;
 395         LDAPRequest     *lr, *tmplr;
 396         LDAPConn        *lc;
 397         BerElement      tmpber;
 398         int             rc, refer_cnt, hadref, simple_request;
 399         ber_int_t       lderr;
 400
 401 #ifdef LDAP_CONNECTIONLESS
 402         LDAPMessage     *tmp = NULL, *chain_head = NULL;
 403         int             moremsgs = 0, isv2 = 0;
 404 #endif
 405
 406         /*
 407          * v3ref = flag for V3 referral / search reference
 408          * 0 = not a ref, 1 = sucessfully chased ref, -1 = pass ref to application
 409          */
 410         enum {
 411                 V3REF_NOREF     = 0,
 412                 V3REF_SUCCESS   = 1,
 413                 V3REF_TOAPP     = -1
 414         }       v3ref;
 415
 416         assert( ld != NULL );
 417         assert( lcp != NULL );
 418         assert( *lcp != NULL );
 419
 420         Debug( LDAP_DEBUG_TRACE, "read1msg: ld %p msgid %d all %d\n",
 421                 (void *)ld, msgid, all );
 422
 423         lc = *lcp;
 424
 425 retry:
 426         if ( lc->lconn_ber == NULL ) {
 427                 lc->lconn_ber = ldap_alloc_ber_with_options(ld);
 428
 429                 if( lc->lconn_ber == NULL ) {
 430                         return -1;
 431                 }
 432         }
 433
 434         ber = lc->lconn_ber;
 435         assert( LBER_VALID (ber) );
 436
 437         /* get the next message */
 438         errno = 0;
 439 #ifdef LDAP_CONNECTIONLESS
 440         if ( LDAP_IS_UDP(ld) ) {
 441                 struct sockaddr from;
 442                 ber_int_sb_read(sb, &from, sizeof(struct sockaddr));
 443                 if (ld->ld_options.ldo_version == LDAP_VERSION2) isv2=1;
 444         }
 445 nextresp3:
 446 #endif
 447         tag = ber_get_next( sb, &len, ber );
 448         if ( tag == LDAP_TAG_MESSAGE ) {
 449                 /*
 450                  * We read a complete message.
 451                  * The connection should no longer need this ber.
 452                  */
 453                 lc->lconn_ber = NULL;
 454         }
 455         if ( tag != LDAP_TAG_MESSAGE ) {
 456                 if ( tag == LBER_DEFAULT) {
 457 #ifdef LDAP_DEBUG
 458                         Debug( LDAP_DEBUG_CONNS,
 459                                 "ber_get_next failed.\n", 0, 0, 0 );
 460 #endif
 461 #ifdef EWOULDBLOCK
 462                         if (errno==EWOULDBLOCK) return -2;
 463 #endif
 464 #ifdef EAGAIN
 465                         if (errno == EAGAIN) return -2;
 466 #endif
 467                         ld->ld_errno = LDAP_SERVER_DOWN;
 468                         return -1;
 469                 }
 470                 ld->ld_errno = LDAP_LOCAL_ERROR;
 471                 return -1;
 472         }
 473
 474         /* message id */
 475         if ( ber_get_int( ber, &id ) == LBER_ERROR ) {
 476                 ber_free( ber, 1 );
 477                 ld->ld_errno = LDAP_DECODING_ERROR;
 478                 return( -1 );
 479         }
 480
 481         /* if it's been abandoned, toss it */
 482         if ( ldap_abandoned( ld, id ) ) {
 483                 Debug( LDAP_DEBUG_ANY, "abandoned ld %p msgid %ld\n",
 484                         (void *)ld, (long) id, 0);
 485 retry_ber:
 486                 ber_free( ber, 1 );
 487                 if ( ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
 488                         goto retry;
 489                 }
 490                 return( -2 );   /* continue looking */
 491         }
 492
 493         lr = ldap_find_request_by_msgid( ld, id );
 494         if ( lr == NULL ) {
 495                 Debug( LDAP_DEBUG_ANY,
 496                         "no request for response on ld %p msgid %ld (tossing)\n",
 497                         (void *)ld, (long) id, 0 );
 498                 goto retry_ber;
 499         }
 500 #ifdef LDAP_CONNECTIONLESS
 501         if (LDAP_IS_UDP(ld) && isv2) {
 502                 ber_scanf(ber, "x{");
 503         }
 504 nextresp2:
 505 #endif
 506         /* the message type */
 507         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
 508                 ld->ld_errno = LDAP_DECODING_ERROR;
 509                 ber_free( ber, 1 );
 510                 return( -1 );
 511         }
 512
 513         Debug( LDAP_DEBUG_TRACE,
 514                 "read1msg: ld %p msgid %ld message type %s\n",
 515                 (void *)ld, (long) lr->lr_msgid, ldap_int_msgtype2str( tag ));
 516
 517         id = lr->lr_origid;
 518         refer_cnt = 0;
 519         hadref = simple_request = 0;
 520         rc = -2;        /* default is to keep looking (no response found) */
 521         lr->lr_res_msgtype = tag;
 522
 523         /*
 524          * This code figures out if we are going to chase a
 525          * referral / search reference, or pass it back to the application
 526          */
 527         v3ref = V3REF_NOREF;    /* Assume not a V3 search reference/referral */
 528         if( (tag != LDAP_RES_SEARCH_ENTRY) && (ld->ld_version > LDAP_VERSION2) ) {
 529                 BerElement      tmpber = *ber;  /* struct copy */
 530                 char **refs = NULL;
 531
 532                 if( tag == LDAP_RES_SEARCH_REFERENCE ) {
 533                         /* This is a V3 search reference */
 534                         /* Assume we do not chase the reference,
 535                          * but pass it to application */
 536                         v3ref = V3REF_TOAPP;
 537                         if( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ||
 538                                         (lr->lr_parent != NULL) )
 539                         {
 540                                 /* Get the referral list */
 541                                 if ( ber_scanf( &tmpber, "{v}", &refs ) == LBER_ERROR ) {
 542                                         rc = LDAP_DECODING_ERROR;
 543                                 } else {
 544                                         /* Note: refs array is freed by ldap_chase_v3referrals */
 545                                         refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
 546                                             1, &lr->lr_res_error, &hadref );
 547                                         if ( refer_cnt > 0 ) {
 548                                                 /* sucessfully chased reference */
 549                                                 /* If haven't got end search, set chasing referrals */
 550                                                 if( lr->lr_status != LDAP_REQST_COMPLETED) {
 551                                                         lr->lr_status = LDAP_REQST_CHASINGREFS;
 552                                                         Debug( LDAP_DEBUG_TRACE,
 553                                                                 "read1msg:  search ref chased, "
 554                                                                 "mark request chasing refs, "
 555                                                                 "id = %d\n",
 556                                                                 lr->lr_msgid, 0, 0);
 557                                                 }
 558
 559                                                 /* We sucessfully chased the reference */
 560                                                 v3ref = V3REF_SUCCESS;
 561                                         }
 562                                 }
 563                         }
 564                 } else {
 565                         /* Check for V3 referral */
 566                         ber_len_t       len;
 567                         char            *lr_res_error = NULL;
 568
 569 #ifdef LDAP_NULL_IS_NULL
 570                         if ( ber_scanf( &tmpber, "{eAA",/*}*/ &lderr,
 571                                     &lr->lr_res_matched, &lr_res_error )
 572                                     != LBER_ERROR )
 573 #else /* ! LDAP_NULL_IS_NULL */
 574                         if ( ber_scanf( &tmpber, "{eaa",/*}*/ &lderr,
 575                                     &lr->lr_res_matched, &lr_res_error )
 576                                     != LBER_ERROR )
 577 #endif /* ! LDAP_NULL_IS_NULL */
 578                         {
 579                                 if ( lr_res_error != NULL ) {
 580 #ifndef LDAP_NULL_IS_NULL
 581                                         if ( lr_res_error[ 0 ] == '\0' ) {
 582                                                 LDAP_FREE( lr_res_error );
 583                                                 lr_res_error = NULL;
 584                                         } else
 585 #endif /* ! LDAP_NULL_IS_NULL */
 586                                         {
 587                                                 if ( lr->lr_res_error != NULL ) {
 588                                                         (void)ldap_append_referral( ld, &lr->lr_res_error, lr_res_error );
 589                                                         LDAP_FREE( (char *)lr_res_error );
 590
 591                                                 } else {
 592                                                         lr->lr_res_error = lr_res_error;
 593                                                 }
 594                                         }
 595                                         lr_res_error = NULL;
 596                                 }
 597
 598                                 /* Check if V3 referral */
 599                                 if ( ber_peek_tag( &tmpber, &len ) == LDAP_TAG_REFERRAL ) {
 600                                         /* We have a V3 referral, assume we cannot chase it */
 601                                         v3ref = V3REF_TOAPP;
 602                                         if( LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS)
 603                                                          || (lr->lr_parent != NULL) )
 604                                         {
 605                                                 /* Assume referral not chased and return it to app */
 606                                                 v3ref = V3REF_TOAPP;
 607
 608                                                 /* Get the referral list */
 609                                                 if( ber_scanf( &tmpber, "{v}", &refs) == LBER_ERROR) {
 610                                                         rc = LDAP_DECODING_ERROR;
 611                                                         lr->lr_status = LDAP_REQST_COMPLETED;
 612                                                         Debug( LDAP_DEBUG_TRACE,
 613                                                                 "read1msg: referral decode error, mark request completed, ld %p msgid %d\n",
 614                                                                 (void *)ld, lr->lr_msgid, 0);
 615                                                 } else {
 616                                                         /* Chase the referral
 617                                                          * Note: refs arrary is freed by ldap_chase_v3referrals
 618                                                          */
 619                                                         refer_cnt = ldap_chase_v3referrals( ld, lr, refs,
 620                                                             0, &lr->lr_res_error, &hadref );
 621                                                         lr->lr_status = LDAP_REQST_COMPLETED;
 622                                                         Debug( LDAP_DEBUG_TRACE,
 623                                                                 "read1msg: referral chased, mark request completed, ld %p msgid %d\n",
 624                                                                 (void *)ld, lr->lr_msgid, 0);
 625                                                         if( refer_cnt > 0) {
 626                                                                 /* Referral successfully chased */
 627                                                                 v3ref = V3REF_SUCCESS;
 628                                                         }
 629                                                 }
 630                                         }
 631                                 }
 632
 633                                 if( lr->lr_res_matched != NULL ) {
 634                                         LDAP_FREE( lr->lr_res_matched );
 635                                         lr->lr_res_matched = NULL;
 636                                 }
 637                                 if( lr->lr_res_error != NULL ) {
 638                                         LDAP_FREE( lr->lr_res_error );
 639                                         lr->lr_res_error = NULL;
 640                                 }
 641                         }
 642                 }
 643         }
 644
 645         /* All results that just return a status, i.e. don't return data
 646          * go through the following code.  This code also chases V2 referrals
 647          * and checks if all referrals have been chased.
 648          */
 649         if ( (tag != LDAP_RES_SEARCH_ENTRY) && (v3ref != V3REF_TOAPP) &&
 650                 (tag != LDAP_RES_INTERMEDIATE ))
 651         {
 652                 /* For a v3 search referral/reference, only come here if already chased it */
 653                 if ( ld->ld_version >= LDAP_VERSION2 &&
 654                         ( lr->lr_parent != NULL ||
 655                         LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_REFERRALS) ) )
 656                 {
 657                         char            *lr_res_error = NULL;
 658
 659                         tmpber = *ber;  /* struct copy */
 660                         if ( v3ref == V3REF_SUCCESS ) {
 661                                 /* V3 search reference or V3 referral
 662                                  * sucessfully chased. If this message
 663                                  * is a search result, then it has no more
 664                                  * outstanding referrals.
 665                                  */
 666                                 if ( tag == LDAP_RES_SEARCH_RESULT )
 667                                         refer_cnt = 0;
 668 #ifdef LDAP_NULL_IS_NULL
 669                         } else if ( ber_scanf( &tmpber, "{eAA}", &lderr,
 670                                 &lr->lr_res_matched, &lr_res_error )
 671                                 != LBER_ERROR )
 672 #else /* ! LDAP_NULL_IS_NULL */
 673                         } else if ( ber_scanf( &tmpber, "{eaa}", &lderr,
 674                                 &lr->lr_res_matched, &lr_res_error )
 675                                 != LBER_ERROR )
 676 #endif /* ! LDAP_NULL_IS_NULL */
 677                         {
 678                                 if ( lr_res_error != NULL ) {
 679 #ifndef LDAP_NULL_IS_NULL
 680                                         if ( lr_res_error[ 0 ] == '\0' ) {
 681                                                 LDAP_FREE( lr_res_error );
 682                                         } else
 683 #endif /* ! LDAP_NULL_IS_NULL */
 684                                         {
 685                                                 if ( lr->lr_res_error != NULL ) {
 686                                                         (void)ldap_append_referral( ld, &lr->lr_res_error, lr_res_error );
 687                                                         LDAP_FREE( (char *)lr_res_error );
 688                                                 } else {
 689                                                         lr->lr_res_error = lr_res_error;
 690                                                 }
 691                                         }
 692                                         lr_res_error = NULL;
 693                                 }
 694
 695                                 switch ( lderr ) {
 696                                 case LDAP_SUCCESS:
 697                                 case LDAP_COMPARE_TRUE:
 698                                 case LDAP_COMPARE_FALSE:
 699                                         break;
 700
 701                                 default:
 702                                         if ( lr->lr_res_error == NULL
 703                                                 || lr->lr_res_error[ 0 ] == '\0' )
 704                                         {
 705                                                 break;
 706                                         }
 707
 708                                         /* referrals are in error string */
 709                                         refer_cnt = ldap_chase_referrals( ld, lr,
 710                                                 &lr->lr_res_error, -1, &hadref );
 711                                         lr->lr_status = LDAP_REQST_COMPLETED;
 712                                         Debug( LDAP_DEBUG_TRACE,
 713                                                 "read1msg:  V2 referral chased, "
 714                                                 "mark request completed, id = %d\n",
 715                                                 lr->lr_msgid, 0, 0 );
 716                                         break;
 717                                 }
 718
 719                                 /* save errno, message, and matched string */
 720                                 if ( !hadref || lr->lr_res_error == NULL ) {
 721                                         lr->lr_res_errno = ( lderr ==
 722                                         LDAP_PARTIAL_RESULTS ) ? LDAP_SUCCESS
 723                                         : lderr;
 724                                 } else if ( ld->ld_errno != LDAP_SUCCESS ) {
 725                                         lr->lr_res_errno = ld->ld_errno;
 726                                 } else {
 727                                         lr->lr_res_errno = LDAP_PARTIAL_RESULTS;
 728                                 }
 729
 730                                 Debug( LDAP_DEBUG_TRACE, "new result:  "
 731                                         "res_errno: %d, "
 732                                         "res_error: <%s>, "
 733                                         "res_matched: <%s>\n",
 734                                         lr->lr_res_errno,
 735                                         lr->lr_res_error ? lr->lr_res_error : "",
 736                                         lr->lr_res_matched ? lr->lr_res_matched : "" );
 737                         }
 738
 739                         /* in any case, don't leave any lr_res_error 'round */
 740                         if ( lr_res_error ) {
 741                                 LDAP_FREE( lr_res_error );
 742                         }
 743                 }
 744
 745                 Debug( LDAP_DEBUG_TRACE,
 746                         "read1msg: ld %p %d new referrals\n",
 747                         (void *)ld, refer_cnt, 0 );
 748
 749                 if ( refer_cnt != 0 ) { /* chasing referrals */
 750                         ber_free( ber, 1 );
 751                         ber = NULL;
 752                         if ( refer_cnt < 0 ) {
 753                                 return( -1 );   /* fatal error */
 754                         }
 755                         lr->lr_res_errno = LDAP_SUCCESS; /* sucessfully chased referral */
 756                 } else {
 757                         if ( lr->lr_outrefcnt <= 0 && lr->lr_parent == NULL ) {
 758                                 /* request without any referrals */
 759                                 simple_request = ( hadref ? 0 : 1 );
 760                         } else {
 761                                 /* request with referrals or child request */
 762                                 ber_free( ber, 1 );
 763                                 ber = NULL;
 764                         }
 765
 766                         lr->lr_status = LDAP_REQST_COMPLETED; /* declare this request done */
 767                         Debug( LDAP_DEBUG_TRACE,
 768                                 "read1msg:  mark request completed, ld %p msgid %d\n",
 769                                 (void *)ld, lr->lr_msgid, 0);
 770                         while ( lr->lr_parent != NULL ) {
 771                                 merge_error_info( ld, lr->lr_parent, lr );
 772
 773                                 lr = lr->lr_parent;
 774                                 if ( --lr->lr_outrefcnt > 0 ) {
 775                                         break;  /* not completely done yet */
 776                                 }
 777                         }
 778
 779                         /* Check if all requests are finished, lr is now parent */
 780                         tmplr = lr;
 781                         if (tmplr->lr_status == LDAP_REQST_COMPLETED) {
 782                                 for ( tmplr=lr->lr_child;
 783                                         tmplr != NULL;
 784                                         tmplr=tmplr->lr_refnext)
 785                                 {
 786                                         if( tmplr->lr_status != LDAP_REQST_COMPLETED) break;
 787                                 }
 788                         }
 789
 790                         /* This is the parent request if the request has referrals */
 791                         if ( lr->lr_outrefcnt <= 0 && lr->lr_parent == NULL &&
 792                                 tmplr == NULL )
 793                         {
 794                                 id = lr->lr_msgid;
 795                                 tag = lr->lr_res_msgtype;
 796                                 Debug( LDAP_DEBUG_ANY, "request done: ld %p msgid %ld\n",
 797                                         (void *)ld, (long) id, 0 );
 798 Debug( LDAP_DEBUG_TRACE,
 799 "res_errno: %d, res_error: <%s>, res_matched: <%s>\n",
 800 lr->lr_res_errno, lr->lr_res_error ? lr->lr_res_error : "",
 801 lr->lr_res_matched ? lr->lr_res_matched : "" );
 802                                 if ( !simple_request ) {
 803                                         ber_free( ber, 1 );
 804                                         ber = NULL;
 805                                         if ( build_result_ber( ld, &ber, lr )
 806                                             == LBER_ERROR ) {
 807                                                 rc = -1; /* fatal error */
 808                                         }
 809                                 }
 810
 811 #ifdef LDAP_R_COMPILE
 812                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 813 #endif
 814                                 ldap_free_request( ld, lr );
 815 #ifdef LDAP_R_COMPILE
 816                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 817 #endif
 818                         }
 819
 820                         if ( lc != NULL ) {
 821 #ifdef LDAP_R_COMPILE
 822                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 823 #endif
 824                                 ldap_free_connection( ld, lc, 0, 1 );
 825 #ifdef LDAP_R_COMPILE
 826                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 827 #endif
 828                                 *lcp = NULL;
 829                         }
 830                 }
 831         }
 832
 833         if ( ber == NULL ) {
 834                 return( rc );
 835         }
 836
 837         /* make a new ldap message */
 838         newmsg = (LDAPMessage *) LDAP_CALLOC( 1, sizeof(LDAPMessage) );
 839         if ( newmsg == NULL ) {
 840                 ld->ld_errno = LDAP_NO_MEMORY;
 841                 return( -1 );
 842         }
 843         newmsg->lm_msgid = (int)id;
 844         newmsg->lm_msgtype = tag;
 845         newmsg->lm_ber = ber;
 846         newmsg->lm_chain_tail = newmsg;
 847
 848 #ifdef LDAP_CONNECTIONLESS
 849         /* CLDAP replies all fit in a single datagram. In LDAPv2 RFC1798
 850          * the responses are all a sequence wrapped in one message. In
 851          * LDAPv3 each response is in its own message. The datagram must
 852          * end with a SearchResult. We can't just parse each response in
 853          * separate calls to try_read1msg because the header info is only
 854          * present at the beginning of the datagram, not at the beginning
 855          * of each response. So parse all the responses at once and queue
 856          * them up, then pull off the first response to return to the
 857          * caller when all parsing is complete.
 858          */
 859         if ( LDAP_IS_UDP(ld) ) {
 860                 /* If not a result, look for more */
 861                 if ( tag != LDAP_RES_SEARCH_RESULT ) {
 862                         int ok = 0;
 863                         moremsgs = 1;
 864                         if (isv2) {
 865                                 /* LDAPv2: dup the current ber, skip past the current
 866                                  * response, and see if there are any more after it.
 867                                  */
 868                                 ber = ber_dup( ber );
 869                                 ber_scanf( ber, "x" );
 870                                 if (ber_peek_tag(ber, &len) != LBER_DEFAULT) {
 871                                         /* There's more - dup the ber buffer so they can all be
 872                                          * individually freed by ldap_msgfree.
 873                                          */
 874                                         struct berval bv;
 875                                         ber_get_option(ber, LBER_OPT_BER_REMAINING_BYTES, &len);
 876                                         bv.bv_val = LDAP_MALLOC(len);
 877                                         if (bv.bv_val) {
 878                                                 ok=1;
 879                                                 ber_read(ber, bv.bv_val, len);
 880                                                 bv.bv_len = len;
 881                                                 ber_init2(ber, &bv, ld->ld_lberoptions );
 882                                         }
 883                                 }
 884                         } else {
 885                                 /* LDAPv3: Just allocate a new ber. Since this is a buffered
 886                                  * datagram, if the sockbuf is readable we still have data
 887                                  * to parse.
 888                                  */
 889                                 ber = ldap_alloc_ber_with_options(ld);
 890                                 if (ber_sockbuf_ctrl(sb, LBER_SB_OPT_DATA_READY, NULL)) ok=1;
 891                         }
 892                         /* set up response chain */
 893                         if ( tmp == NULL ) {
 894                                 newmsg->lm_next = ld->ld_responses;
 895                                 ld->ld_responses = newmsg;
 896                                 chain_head = newmsg;
 897                         } else {
 898                                 tmp->lm_chain = newmsg;
 899                         }
 900                         chain_head->lm_chain_tail = newmsg;
 901                         tmp = newmsg;
 902                         /* "ok" means there's more to parse */
 903                         if (ok) {
 904                                 if (isv2) goto nextresp2;
 905                                 else goto nextresp3;
 906                         } else {
 907                                 /* got to end of datagram without a SearchResult. Free
 908                                  * our dup'd ber, but leave any buffer alone. For v2 case,
 909                                  * the previous response is still using this buffer. For v3,
 910                                  * the new ber has no buffer to free yet.
 911                                  */
 912                                 ber_free(ber, 0);
 913                                 return -1;
 914                         }
 915                 } else if ( moremsgs ) {
 916                 /* got search result, and we had multiple responses in 1 datagram.
 917                  * stick the result onto the end of the chain, and then pull the
 918                  * first response off the head of the chain.
 919                  */
 920                         tmp->lm_chain = newmsg;
 921                         chain_head->lm_chain_tail = newmsg;
 922                         *result = chkResponseList( ld, msgid, all );
 923                         ld->ld_errno = LDAP_SUCCESS;
 924                         return( (*result)->lm_msgtype );
 925                 }
 926         }
 927 #endif /* LDAP_CONNECTIONLESS */
 928
 929         /* is this the one we're looking for? */
 930         if ( msgid == LDAP_RES_ANY || id == msgid ) {
 931                 if ( all == LDAP_MSG_ONE
 932                     || (newmsg->lm_msgtype != LDAP_RES_SEARCH_RESULT
 933                     && newmsg->lm_msgtype != LDAP_RES_SEARCH_ENTRY
 934                     && newmsg->lm_msgtype != LDAP_RES_SEARCH_REFERENCE) ) {
 935                         *result = newmsg;
 936                         ld->ld_errno = LDAP_SUCCESS;
 937                         return( tag );
 938                 } else if ( newmsg->lm_msgtype == LDAP_RES_SEARCH_RESULT) {
 939                         foundit = 1;    /* return the chain later */
 940                 }
 941         }
 942
 943         /*
 944          * if not, we must add it to the list of responses.  if
 945          * the msgid is already there, it must be part of an existing
 946          * search response.
 947          */
 948
 949         prev = NULL;
 950         for ( l = ld->ld_responses; l != NULL; l = l->lm_next ) {
 951                 if ( l->lm_msgid == newmsg->lm_msgid )
 952                         break;
 953                 prev = l;
 954         }
 955
 956         /* not part of an existing search response */
 957         if ( l == NULL ) {
 958                 if ( foundit ) {
 959                         *result = newmsg;
 960                         goto exit;
 961                 }
 962
 963                 newmsg->lm_next = ld->ld_responses;
 964                 ld->ld_responses = newmsg;
 965                 goto exit;
 966         }
 967
 968         Debug( LDAP_DEBUG_TRACE, "adding response ld %p msgid %ld type %ld:\n",
 969                 (void *)ld, (long) newmsg->lm_msgid, (long) newmsg->lm_msgtype );
 970
 971         /* part of a search response - add to end of list of entries */
 972         l->lm_chain_tail->lm_chain = newmsg;
 973         l->lm_chain_tail = newmsg;
 974
 975         /* return the whole chain if that's what we were looking for */
 976         if ( foundit ) {
 977                 if ( prev == NULL )
 978                         ld->ld_responses = l->lm_next;
 979                 else
 980                         prev->lm_next = l->lm_next;
 981                 *result = l;
 982         }
 983
 984 exit:
 985         if ( foundit ) {
 986                 ld->ld_errno = LDAP_SUCCESS;
 987                 return( tag );
 988         }
 989         if ( ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ) ) {
 990                 goto retry;
 991         }
 992         return( -2 );   /* continue looking */
 993 }
 994
 995
 996 static ber_tag_t
 997 build_result_ber( LDAP *ld, BerElement **bp, LDAPRequest *lr )
 998 {
 999         ber_len_t       len;
1000         ber_tag_t       tag;
1001         ber_int_t       along;
1002         BerElement *ber;
1003
1004         *bp = NULL;
1005         ber = ldap_alloc_ber_with_options( ld );
1006
1007         if( ber == NULL ) {
1008                 ld->ld_errno = LDAP_NO_MEMORY;
1009                 return LBER_ERROR;
1010         }
1011
1012         if ( ber_printf( ber, "{it{ess}}", lr->lr_msgid,
1013                 lr->lr_res_msgtype, lr->lr_res_errno,
1014                 lr->lr_res_matched ? lr->lr_res_matched : "",
1015                 lr->lr_res_error ? lr->lr_res_error : "" ) == -1 )
1016         {
1017                 ld->ld_errno = LDAP_ENCODING_ERROR;
1018                 ber_free(ber, 1);
1019                 return( LBER_ERROR );
1020         }
1021
1022         ber_reset( ber, 1 );
1023
1024         if ( ber_skip_tag( ber, &len ) == LBER_ERROR ) {
1025                 ld->ld_errno = LDAP_DECODING_ERROR;
1026                 ber_free(ber, 1);
1027                 return( LBER_ERROR );
1028         }
1029
1030         if ( ber_get_enum( ber, &along ) == LBER_ERROR ) {
1031                 ld->ld_errno = LDAP_DECODING_ERROR;
1032                 ber_free(ber, 1);
1033                 return( LBER_ERROR );
1034         }
1035
1036         tag = ber_peek_tag( ber, &len );
1037
1038         if ( tag == LBER_ERROR ) {
1039                 ld->ld_errno = LDAP_DECODING_ERROR;
1040                 ber_free(ber, 1);
1041                 return( LBER_ERROR );
1042         }
1043
1044         *bp = ber;
1045         return tag;
1046 }
1047
1048
1049 static void
1050 merge_error_info( LDAP *ld, LDAPRequest *parentr, LDAPRequest *lr )
1051 {
1052 /*
1053  * Merge error information in "lr" with "parentr" error code and string.
1054  */
1055         if ( lr->lr_res_errno == LDAP_PARTIAL_RESULTS ) {
1056                 parentr->lr_res_errno = lr->lr_res_errno;
1057                 if ( lr->lr_res_error != NULL ) {
1058                         (void)ldap_append_referral( ld, &parentr->lr_res_error,
1059                             lr->lr_res_error );
1060                 }
1061         } else if ( lr->lr_res_errno != LDAP_SUCCESS &&
1062                 parentr->lr_res_errno == LDAP_SUCCESS )
1063         {
1064                 parentr->lr_res_errno = lr->lr_res_errno;
1065                 if ( parentr->lr_res_error != NULL ) {
1066                         LDAP_FREE( parentr->lr_res_error );
1067                 }
1068                 parentr->lr_res_error = lr->lr_res_error;
1069                 lr->lr_res_error = NULL;
1070                 if ( LDAP_NAME_ERROR( lr->lr_res_errno ) ) {
1071                         if ( parentr->lr_res_matched != NULL ) {
1072                                 LDAP_FREE( parentr->lr_res_matched );
1073                         }
1074                         parentr->lr_res_matched = lr->lr_res_matched;
1075                         lr->lr_res_matched = NULL;
1076                 }
1077         }
1078
1079         Debug( LDAP_DEBUG_TRACE, "merged parent (id %d) error info:  ",
1080             parentr->lr_msgid, 0, 0 );
1081         Debug( LDAP_DEBUG_TRACE, "result errno %d, error <%s>, matched <%s>\n",
1082             parentr->lr_res_errno, parentr->lr_res_error ?
1083             parentr->lr_res_error : "", parentr->lr_res_matched ?
1084             parentr->lr_res_matched : "" );
1085 }
1086
1087
1088
1089 int
1090 ldap_msgtype( LDAPMessage *lm )
1091 {
1092         assert( lm != NULL );
1093         return ( lm != NULL ) ? (int)lm->lm_msgtype : -1;
1094 }
1095
1096
1097 int
1098 ldap_msgid( LDAPMessage *lm )
1099 {
1100         assert( lm != NULL );
1101
1102         return ( lm != NULL ) ? lm->lm_msgid : -1;
1103 }
1104
1105
1106 char * ldap_int_msgtype2str( ber_tag_t tag )
1107 {
1108         switch( tag ) {
1109         case LDAP_RES_ADD: return "add";
1110         case LDAP_RES_BIND: return "bind";
1111         case LDAP_RES_COMPARE: return "compare";
1112         case LDAP_RES_DELETE: return "delete";
1113         case LDAP_RES_EXTENDED: return "extended-result";
1114         case LDAP_RES_INTERMEDIATE: return "intermediate";
1115         case LDAP_RES_MODIFY: return "modify";
1116         case LDAP_RES_RENAME: return "rename";
1117         case LDAP_RES_SEARCH_ENTRY: return "search-entry";
1118         case LDAP_RES_SEARCH_REFERENCE: return "search-reference";
1119         case LDAP_RES_SEARCH_RESULT: return "search-result";
1120         }
1121         return "unknown";
1122 }
1123
1124 int
1125 ldap_msgfree( LDAPMessage *lm )
1126 {
1127         LDAPMessage     *next;
1128         int             type = 0;
1129
1130         Debug( LDAP_DEBUG_TRACE, "ldap_msgfree\n", 0, 0, 0 );
1131
1132         for ( ; lm != NULL; lm = next ) {
1133                 next = lm->lm_chain;
1134                 type = lm->lm_msgtype;
1135                 ber_free( lm->lm_ber, 1 );
1136                 LDAP_FREE( (char *) lm );
1137         }
1138
1139         return( type );
1140 }
1141
1142 /*
1143  * ldap_msgdelete - delete a message.  It returns:
1144  *      0       if the entire message was deleted
1145  *      -1      if the message was not found, or only part of it was found
1146  */
1147 int
1148 ldap_msgdelete( LDAP *ld, int msgid )
1149 {
1150         LDAPMessage     *lm, *prev;
1151         int rc = 0;
1152
1153         assert( ld != NULL );
1154
1155         Debug( LDAP_DEBUG_TRACE, "ldap_msgdelete\n", 0, 0, 0 );
1156
1157         prev = NULL;
1158 #ifdef LDAP_R_COMPILE
1159         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
1160 #endif
1161         for ( lm = ld->ld_responses; lm != NULL; lm = lm->lm_next ) {
1162                 if ( lm->lm_msgid == msgid )
1163                         break;
1164                 prev = lm;
1165         }
1166
1167         if ( lm == NULL ) {
1168                 rc = -1;
1169         } else {
1170                 if ( prev == NULL )
1171                         ld->ld_responses = lm->lm_next;
1172                 else
1173                         prev->lm_next = lm->lm_next;
1174         }
1175 #ifdef LDAP_R_COMPILE
1176         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
1177 #endif
1178         if ( lm && ldap_msgfree( lm ) == LDAP_RES_SEARCH_ENTRY )
1179                 rc = -1;
1180
1181         return( rc );
1182 }
1183
1184
1185 /*
1186  * return 1 if message msgid is waiting to be abandoned, 0 otherwise
1187  */
1188 static int
1189 ldap_abandoned( LDAP *ld, ber_int_t msgid )
1190 {
1191         int     i;
1192
1193         if ( ld->ld_abandoned == NULL )
1194                 return( 0 );
1195
1196         for ( i = 0; ld->ld_abandoned[i] != -1; i++ )
1197                 if ( ld->ld_abandoned[i] == msgid )
1198                         return( 1 );
1199
1200         return( 0 );
1201 }
1202
1203
1204 static int
1205 ldap_mark_abandoned( LDAP *ld, ber_int_t msgid )
1206 {
1207         int     i;
1208
1209         if ( ld->ld_abandoned == NULL )
1210                 return( -1 );
1211
1212         for ( i = 0; ld->ld_abandoned[i] != -1; i++ )
1213                 if ( ld->ld_abandoned[i] == msgid )
1214                         break;
1215
1216         if ( ld->ld_abandoned[i] == -1 )
1217                 return( -1 );
1218
1219         for ( ; ld->ld_abandoned[i] != -1; i++ ) {
1220                 ld->ld_abandoned[i] = ld->ld_abandoned[i + 1];
1221         }
1222
1223         return( 0 );
1224 }