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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2006 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  */
  18 /* This notice applies to changes, created by or for Novell, Inc.,
  19  * to preexisting works for which notices appear elsewhere in this file.
  20  *
  21  * Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
  22  *
  23  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND TREATIES.
  24  * USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT TO VERSION
  25  * 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS AVAILABLE AT
  26  * HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE" IN THE
  27  * TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION OF THIS
  28  * WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP PUBLIC
  29  * LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT THE
  30  * PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
  31  *---
  32  * Modification to OpenLDAP source by Novell, Inc.
  33  * April 2000 sfs  Added code to chase V3 referrals
  34  *  request.c - sending of ldap requests; handling of referrals
  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
  41 #include "portable.h"
  42
  43 #include <stdio.h>
  44
  45 #include <ac/stdlib.h>
  46
  47 #include <ac/errno.h>
  48 #include <ac/socket.h>
  49 #include <ac/string.h>
  50 #include <ac/time.h>
  51 #include <ac/unistd.h>
  52
  53 #include "ldap-int.h"
  54 #include "lber.h"
  55
  56 static LDAPConn *find_connection LDAP_P(( LDAP *ld, LDAPURLDesc *srv, int any ));
  57 static void use_connection LDAP_P(( LDAP *ld, LDAPConn *lc ));
  58 static void ldap_free_request_int LDAP_P(( LDAP *ld, LDAPRequest *lr ));
  59
  60 static BerElement *
  61 re_encode_request( LDAP *ld,
  62         BerElement *origber,
  63         ber_int_t msgid,
  64         int sref,
  65         LDAPURLDesc *srv,
  66         int *type );
  67
  68 BerElement *
  69 ldap_alloc_ber_with_options( LDAP *ld )
  70 {
  71         BerElement      *ber;
  72
  73     if (( ber = ber_alloc_t( ld->ld_lberoptions )) == NULL ) {
  74                 ld->ld_errno = LDAP_NO_MEMORY;
  75         }
  76
  77         return( ber );
  78 }
  79
  80
  81 void
  82 ldap_set_ber_options( LDAP *ld, BerElement *ber )
  83 {
  84         ber->ber_options = ld->ld_lberoptions;
  85 }
  86
  87
  88 ber_int_t
  89 ldap_send_initial_request(
  90         LDAP *ld,
  91         ber_tag_t msgtype,
  92         const char *dn,
  93         BerElement *ber,
  94         ber_int_t msgid)
  95 {
  96         int rc;
  97
  98         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
  99
 100         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 101                 /* not connected yet */
 102                 int rc = ldap_open_defconn( ld );
 103
 104                 if( rc < 0 ) {
 105                         ber_free( ber, 1 );
 106                         return( -1 );
 107                 }
 108
 109                 Debug( LDAP_DEBUG_TRACE,
 110                         "ldap_open_defconn: successful\n",
 111                         0, 0, 0 );
 112         }
 113
 114 #ifdef LDAP_CONNECTIONLESS
 115         if (LDAP_IS_UDP(ld)) {
 116                 if (msgtype == LDAP_REQ_BIND) {
 117                         if (ld->ld_options.ldo_cldapdn)
 118                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 119                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 120                         return 0;
 121                 }
 122                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 123                         return LDAP_PARAM_ERROR;
 124         }
 125 #endif
 126 #ifdef LDAP_R_COMPILE
 127         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 128 #endif
 129         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 130                 NULL, NULL, NULL );
 131 #ifdef LDAP_R_COMPILE
 132         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 133 #endif
 134         return(rc);
 135 }
 136
 137
 138 int
 139 ldap_int_flush_request(
 140         LDAP *ld,
 141         LDAPRequest *lr )
 142 {
 143         LDAPConn *lc = lr->lr_conn;
 144
 145         if ( ber_flush2( lc->lconn_sb, lr->lr_ber, LBER_FLUSH_FREE_NEVER ) != 0 ) {
 146                 if ( errno == EAGAIN ) {
 147                         /* need to continue write later */
 148                         lr->lr_status = LDAP_REQST_WRITING;
 149                         ldap_mark_select_write( ld, lc->lconn_sb );
 150                         ld->ld_errno = LDAP_BUSY;
 151                         return -2;
 152                 } else {
 153                         ld->ld_errno = LDAP_SERVER_DOWN;
 154                         ldap_free_request( ld, lr );
 155                         ldap_free_connection( ld, lc, 0, 0 );
 156                         return( -1 );
 157                 }
 158         } else {
 159                 if ( lr->lr_parent == NULL ) {
 160                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 161                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 162                 }
 163                 lr->lr_status = LDAP_REQST_INPROGRESS;
 164
 165                 /* sent -- waiting for a response */
 166                 ldap_mark_select_read( ld, lc->lconn_sb );
 167         }
 168         return 0;
 169 }
 170
 171 int
 172 ldap_send_server_request(
 173         LDAP *ld,
 174         BerElement *ber,
 175         ber_int_t msgid,
 176         LDAPRequest *parentreq,
 177         LDAPURLDesc **srvlist,
 178         LDAPConn *lc,
 179         LDAPreqinfo *bind )
 180 {
 181         LDAPRequest     *lr;
 182         int             incparent, rc;
 183
 184         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 185
 186         incparent = 0;
 187         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 188
 189         if ( lc == NULL ) {
 190                 if ( srvlist == NULL ) {
 191                         lc = ld->ld_defconn;
 192                 } else {
 193                         lc = find_connection( ld, *srvlist, 1 );
 194                         if ( lc == NULL ) {
 195                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 196                                         /* Remember the bind in the parent */
 197                                         incparent = 1;
 198                                         ++parentreq->lr_outrefcnt;
 199                                 }
 200                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 201                         }
 202                 }
 203         }
 204
 205         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 206                 ber_free( ber, 1 );
 207                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 208                         ld->ld_errno = LDAP_SERVER_DOWN;
 209                 }
 210                 if ( incparent ) {
 211                         /* Forget about the bind */
 212                         --parentreq->lr_outrefcnt;
 213                 }
 214                 return( -1 );
 215         }
 216
 217         use_connection( ld, lc );
 218
 219         /* If we still have an incomplete write, try to finish it before
 220          * dealing with the new request. If we don't finish here, return
 221          * LDAP_BUSY and let the caller retry later. We only allow a single
 222          * request to be in WRITING state.
 223          */
 224         rc = 0;
 225         if ( ld->ld_requests &&
 226                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 227                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 228         {
 229                 rc = -1;
 230         }
 231         if ( rc ) return rc;
 232
 233         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 234         if ( lr == NULL ) {
 235                 ld->ld_errno = LDAP_NO_MEMORY;
 236                 ldap_free_connection( ld, lc, 0, 0 );
 237                 ber_free( ber, 1 );
 238                 if ( incparent ) {
 239                         /* Forget about the bind */
 240                         --parentreq->lr_outrefcnt;
 241                 }
 242                 return( -1 );
 243         }
 244         lr->lr_msgid = msgid;
 245         lr->lr_status = LDAP_REQST_INPROGRESS;
 246         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 247         lr->lr_ber = ber;
 248         lr->lr_conn = lc;
 249         if ( parentreq != NULL ) {      /* sub-request */
 250                 if ( !incparent ) {
 251                         /* Increment if we didn't do it before the bind */
 252                         ++parentreq->lr_outrefcnt;
 253                 }
 254                 lr->lr_origid = parentreq->lr_origid;
 255                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 256                 lr->lr_parent = parentreq;
 257                 lr->lr_refnext = parentreq->lr_child;
 258                 parentreq->lr_child = lr;
 259         } else {                        /* original request */
 260                 lr->lr_origid = lr->lr_msgid;
 261         }
 262
 263         /* Extract requestDN for future reference */
 264         {
 265                 BerElement tmpber = *ber;
 266                 ber_int_t       bint;
 267                 ber_tag_t       tag, rtag;
 268
 269                 ber_reset( &tmpber, 1 );
 270                 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
 271                 switch ( tag ) {
 272                 case LDAP_REQ_BIND:
 273                         rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
 274                         break;
 275                 case LDAP_REQ_DELETE:
 276                         break;
 277                 default:
 278                         rtag = ber_scanf( &tmpber, "{" /*}*/ );
 279                 case LDAP_REQ_ABANDON:
 280                         break;
 281                 }
 282                 if ( tag != LDAP_REQ_ABANDON ) {
 283                         ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
 284                         lr->lr_dn.bv_val = tmpber.ber_ptr;
 285                 }
 286         }
 287
 288         lr->lr_prev = NULL;
 289         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 290                 lr->lr_next->lr_prev = lr;
 291         }
 292         ld->ld_requests = lr;
 293
 294         ld->ld_errno = LDAP_SUCCESS;
 295         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 296                 msgid = -1;
 297         }
 298
 299         return( msgid );
 300 }
 301
 302 LDAPConn *
 303 ldap_new_connection( LDAP *ld, LDAPURLDesc **srvlist, int use_ldsb,
 304         int connect, LDAPreqinfo *bind )
 305 {
 306         LDAPConn        *lc;
 307
 308         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 309                 use_ldsb, connect, (bind != NULL) );
 310         /*
 311          * make a new LDAP server connection
 312          * XXX open connection synchronously for now
 313          */
 314         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 315         if ( lc == NULL ) {
 316                 ld->ld_errno = LDAP_NO_MEMORY;
 317                 return( NULL );
 318         }
 319
 320         if ( use_ldsb ) {
 321                 assert( ld->ld_sb != NULL );
 322                 lc->lconn_sb = ld->ld_sb;
 323
 324         } else {
 325                 lc->lconn_sb = ber_sockbuf_alloc();
 326                 if ( lc->lconn_sb == NULL ) {
 327                         LDAP_FREE( (char *)lc );
 328                         ld->ld_errno = LDAP_NO_MEMORY;
 329                         return( NULL );
 330                 }
 331         }
 332
 333         if ( connect ) {
 334                 LDAPURLDesc     **srvp, *srv = NULL;
 335
 336                 for ( srvp = srvlist; *srvp != NULL; srvp = &(*srvp)->lud_next ) {
 337                         if ( ldap_int_open_connection( ld, lc, *srvp, 0 ) != -1 )
 338                         {
 339                                 srv = *srvp;
 340
 341                                 if ( ld->ld_urllist_proc ) {
 342                                         ld->ld_urllist_proc( ld, srvlist, srvp, ld->ld_urllist_params );
 343                                 }
 344
 345                                 break;
 346                         }
 347                 }
 348
 349                 if ( srv == NULL ) {
 350                         if ( !use_ldsb ) {
 351                                 ber_sockbuf_free( lc->lconn_sb );
 352                         }
 353                         LDAP_FREE( (char *)lc );
 354                         ld->ld_errno = LDAP_SERVER_DOWN;
 355                         return( NULL );
 356                 }
 357
 358                 lc->lconn_server = ldap_url_dup( srv );
 359         }
 360
 361         lc->lconn_status = LDAP_CONNST_CONNECTED;
 362 #ifdef LDAP_R_COMPILE
 363         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 364 #endif
 365         lc->lconn_next = ld->ld_conns;
 366         ld->ld_conns = lc;
 367 #ifdef LDAP_R_COMPILE
 368         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 369 #endif
 370
 371         if ( bind != NULL ) {
 372                 int             err = 0;
 373                 LDAPConn        *savedefconn;
 374
 375                 /* Set flag to prevent additional referrals
 376                  * from being processed on this
 377                  * connection until the bind has completed
 378                  */
 379                 lc->lconn_rebind_inprogress = 1;
 380                 /* V3 rebind function */
 381                 if ( ld->ld_rebind_proc != NULL) {
 382                         LDAPURLDesc     *srvfunc;
 383
 384                         srvfunc = ldap_url_dup( *srvlist );
 385                         if ( srvfunc == NULL ) {
 386                                 ld->ld_errno = LDAP_NO_MEMORY;
 387                                 err = -1;
 388                         } else {
 389                                 savedefconn = ld->ld_defconn;
 390                                 ++lc->lconn_refcnt;     /* avoid premature free */
 391                                 ld->ld_defconn = lc;
 392
 393                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 394 #ifdef LDAP_R_COMPILE
 395                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 396                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 397 #endif
 398                                 err = (*ld->ld_rebind_proc)( ld,
 399                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 400                                         ld->ld_rebind_params );
 401 #ifdef LDAP_R_COMPILE
 402                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 403                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 404 #endif
 405
 406                                 ld->ld_defconn = savedefconn;
 407                                 --lc->lconn_refcnt;
 408
 409                                 if ( err != 0 ) {
 410                                         err = -1;
 411                                         ldap_free_connection( ld, lc, 1, 0 );
 412                                         lc = NULL;
 413                                 }
 414                                 ldap_free_urldesc( srvfunc );
 415                         }
 416                 } else {
 417                         int             msgid, rc;
 418                         struct berval   passwd = BER_BVNULL;
 419
 420                         savedefconn = ld->ld_defconn;
 421                         ++lc->lconn_refcnt;     /* avoid premature free */
 422                         ld->ld_defconn = lc;
 423
 424                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 425 #ifdef LDAP_R_COMPILE
 426                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 427                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 428 #endif
 429                         rc = ldap_sasl_bind( ld, "", LDAP_SASL_SIMPLE, &passwd,
 430                                 NULL, NULL, &msgid );
 431                         if ( rc != LDAP_SUCCESS ) {
 432                                 err = -1;
 433
 434                         } else {
 435                                 for ( err = 1; err > 0; ) {
 436                                         struct timeval  tv = { 0, 100000 };
 437                                         LDAPMessage     *res = NULL;
 438
 439                                         switch ( ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 440                                         case -1:
 441                                                 err = -1;
 442                                                 break;
 443
 444                                         case 0:
 445 #ifdef LDAP_R_COMPILE
 446                                                 ldap_pvt_thread_yield();
 447 #endif
 448                                                 break;
 449
 450                                         case LDAP_RES_BIND:
 451                                                 rc = ldap_parse_result( ld, res, &err, NULL, NULL, NULL, NULL, 1 );
 452                                                 if ( rc != LDAP_SUCCESS ) {
 453                                                         err = -1;
 454
 455                                                 } else if ( err != LDAP_SUCCESS ) {
 456                                                         err = -1;
 457                                                 }
 458                                                 /* else err == LDAP_SUCCESS == 0 */
 459                                                 break;
 460
 461                                         default:
 462                                                 assert( 0 );
 463                                         }
 464                                 }
 465                         }
 466 #ifdef LDAP_R_COMPILE
 467                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 468                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 469 #endif
 470                         ld->ld_defconn = savedefconn;
 471                         --lc->lconn_refcnt;
 472
 473                         if ( err != 0 ) {
 474                                 ldap_free_connection( ld, lc, 1, 0 );
 475                                 lc = NULL;
 476                         }
 477                 }
 478                 if ( lc != NULL )
 479                         lc->lconn_rebind_inprogress = 0;
 480         }
 481
 482         return( lc );
 483 }
 484
 485
 486 static LDAPConn *
 487 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 488 /*
 489  * return an existing connection (if any) to the server srv
 490  * if "any" is non-zero, check for any server in the "srv" chain
 491  */
 492 {
 493         LDAPConn        *lc;
 494         LDAPURLDesc     *lcu, *lsu;
 495         int lcu_port, lsu_port;
 496         int found = 0;
 497
 498 #ifdef LDAP_R_COMPILE
 499         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 500 #endif
 501         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 502                 lcu = lc->lconn_server;
 503                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 504                         lcu->lud_port );
 505
 506                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 507                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 508                                 lsu->lud_port );
 509
 510                         if ( lsu_port == lcu_port
 511                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 512                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 513                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 514                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 515                         {
 516                                 found = 1;
 517                                 break;
 518                         }
 519
 520                         if ( !any ) break;
 521                 }
 522                 if ( found )
 523                         break;
 524         }
 525 #ifdef LDAP_R_COMPILE
 526         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 527 #endif
 528         return lc;
 529 }
 530
 531
 532
 533 static void
 534 use_connection( LDAP *ld, LDAPConn *lc )
 535 {
 536         ++lc->lconn_refcnt;
 537         lc->lconn_lastused = time( NULL );
 538 }
 539
 540
 541 void
 542 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 543 {
 544         LDAPConn        *tmplc, *prevlc;
 545
 546         Debug( LDAP_DEBUG_TRACE,
 547                 "ldap_free_connection %d %d\n",
 548                 force, unbind, 0 );
 549
 550         if ( force || --lc->lconn_refcnt <= 0 ) {
 551                 /* remove from connections list first */
 552 #ifdef LDAP_R_COMPILE
 553                 ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 554 #endif
 555
 556                 for ( prevlc = NULL, tmplc = ld->ld_conns;
 557                         tmplc != NULL;
 558                         tmplc = tmplc->lconn_next )
 559                 {
 560                         if ( tmplc == lc ) {
 561                                 if ( prevlc == NULL ) {
 562                                     ld->ld_conns = tmplc->lconn_next;
 563                                 } else {
 564                                     prevlc->lconn_next = tmplc->lconn_next;
 565                                 }
 566                                 break;
 567                         }
 568                         prevlc = tmplc;
 569                 }
 570 #ifdef LDAP_R_COMPILE
 571                 ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 572 #endif
 573
 574                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 575                         ldap_mark_select_clear( ld, lc->lconn_sb );
 576                         if ( unbind ) {
 577                                 ldap_send_unbind( ld, lc->lconn_sb,
 578                                                 NULL, NULL );
 579                         }
 580                 }
 581
 582                 if ( lc->lconn_ber != NULL ) {
 583                         ber_free( lc->lconn_ber, 1 );
 584                 }
 585
 586                 ldap_int_sasl_close( ld, lc );
 587
 588                 ldap_free_urllist( lc->lconn_server );
 589 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 590                 if ( lc->lconn_krbinstance != NULL ) {
 591                         LDAP_FREE( lc->lconn_krbinstance );
 592                 }
 593 #endif
 594
 595                 /* FIXME: is this at all possible? */
 596                 if ( force ) {
 597                         LDAPRequest     *lr;
 598
 599                         for ( lr = ld->ld_requests; lr; ) {
 600                                 LDAPRequest     *lr_next = lr->lr_next;
 601
 602                                 if ( lr->lr_conn == lc ) {
 603                                         ldap_free_request_int( ld, lr );
 604                                 }
 605
 606                                 lr = lr_next;
 607                         }
 608                 }
 609
 610                 if ( lc->lconn_sb != ld->ld_sb ) {
 611                         ber_sockbuf_free( lc->lconn_sb );
 612                 }
 613
 614                 if ( lc->lconn_rebind_queue != NULL) {
 615                         int i;
 616                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 617                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 618                         }
 619                         LDAP_FREE( lc->lconn_rebind_queue );
 620                 }
 621
 622                 LDAP_FREE( lc );
 623
 624                 Debug( LDAP_DEBUG_TRACE,
 625                         "ldap_free_connection: actually freed\n",
 626                         0, 0, 0 );
 627
 628         } else {
 629                 lc->lconn_lastused = time( NULL );
 630                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 631                                 lc->lconn_refcnt, 0, 0 );
 632         }
 633 }
 634
 635
 636 #ifdef LDAP_DEBUG
 637 void
 638 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 639 {
 640         LDAPConn        *lc;
 641         char            timebuf[32];
 642
 643         fprintf( stderr, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "" );
 644         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 645                 if ( lc->lconn_server != NULL ) {
 646                         fprintf( stderr, "* host: %s  port: %d%s\n",
 647                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 648                             : lc->lconn_server->lud_host,
 649                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 650                             ld->ld_sb ) ? "  (default)" : "" );
 651                 }
 652                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 653                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 654                     "NeedSocket" : ( lc->lconn_status ==
 655                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 656                 fprintf( stderr, "  last used: %s",
 657                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 658                 if( lc->lconn_rebind_inprogress ) {
 659                         fprintf( stderr, "  rebind in progress\n");
 660                         if( lc->lconn_rebind_queue != NULL) {
 661                                 int i = 0;
 662                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 663                                         int j = 0;
 664                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 665                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 666                                                         i, j, lc->lconn_rebind_queue[i][j]);
 667                                         }
 668                                 }
 669                         } else {
 670                                 fprintf( stderr, "    queue is empty\n");
 671                         }
 672                 }
 673                 fprintf(stderr, "\n");
 674                 if ( !all ) {
 675                         break;
 676                 }
 677         }
 678 }
 679
 680
 681 void
 682 ldap_dump_requests_and_responses( LDAP *ld )
 683 {
 684         LDAPRequest     *lr;
 685         LDAPMessage     *lm, *l;
 686
 687 #ifdef LDAP_R_COMPILE
 688         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 689 #endif
 690         fprintf( stderr, "** ld %p Outstanding Requests:\n", (void *)ld );
 691         if (( lr = ld->ld_requests ) == NULL ) {
 692                 fprintf( stderr, "   Empty\n" );
 693         }
 694         for ( ; lr != NULL; lr = lr->lr_next ) {
 695             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 696                 lr->lr_msgid, lr->lr_origid,
 697                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 698                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 699                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 700                 ( lr->lr_status == LDAP_REQST_WRITING ) ? "Writing" :
 701                 ( lr->lr_status == LDAP_REQST_COMPLETED ) ? "RequestCompleted"
 702                         : "InvalidStatus");
 703             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 704                     lr->lr_outrefcnt, lr->lr_parentcnt );
 705         }
 706 #ifdef LDAP_R_COMPILE
 707         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 708 #endif
 709         fprintf( stderr, "** ld %p Response Queue:\n", (void *)ld );
 710         if (( lm = ld->ld_responses ) == NULL ) {
 711                 fprintf( stderr, "   Empty\n" );
 712         }
 713         for ( ; lm != NULL; lm = lm->lm_next ) {
 714                 fprintf( stderr, " * msgid %d,  type %lu\n",
 715                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 716                 if (( l = lm->lm_chain ) != NULL ) {
 717                         fprintf( stderr, "   chained responses:\n" );
 718                         for ( ; l != NULL; l = l->lm_chain ) {
 719                                 fprintf( stderr,
 720                                     "  * msgid %d,  type %lu\n",
 721                                     l->lm_msgid,
 722                                     (unsigned long) l->lm_msgtype );
 723                         }
 724                 }
 725         }
 726 }
 727 #endif /* LDAP_DEBUG */
 728
 729 static void
 730 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 731 {
 732         if ( lr->lr_prev == NULL ) {
 733                 /* free'ing the first request? */
 734                 assert( ld->ld_requests == lr );
 735                 ld->ld_requests = lr->lr_next;
 736
 737         } else {
 738                 lr->lr_prev->lr_next = lr->lr_next;
 739         }
 740
 741         if ( lr->lr_next != NULL ) {
 742                 lr->lr_next->lr_prev = lr->lr_prev;
 743         }
 744
 745         if ( lr->lr_ber != NULL ) {
 746                 ber_free( lr->lr_ber, 1 );
 747                 lr->lr_ber = NULL;
 748         }
 749
 750         if ( lr->lr_res_error != NULL ) {
 751                 LDAP_FREE( lr->lr_res_error );
 752                 lr->lr_res_error = NULL;
 753         }
 754
 755         if ( lr->lr_res_matched != NULL ) {
 756                 LDAP_FREE( lr->lr_res_matched );
 757                 lr->lr_res_matched = NULL;
 758         }
 759
 760         LDAP_FREE( lr );
 761 }
 762
 763 void
 764 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 765 {
 766         LDAPRequest     **ttmplr;
 767 #ifdef LDAP_R_COMPILE
 768         LDAP_PVT_THREAD_ASSERT_MUTEX_OWNER( &ld->ld_req_mutex );
 769 #endif
 770
 771         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 772                 lr->lr_origid, lr->lr_msgid, 0 );
 773
 774         /* free all referrals (child requests) */
 775         while ( lr->lr_child )
 776                 ldap_free_request( ld, lr->lr_child );
 777
 778         if ( lr->lr_parent != NULL ) {
 779                 --lr->lr_parent->lr_outrefcnt;
 780                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 781                 if ( *ttmplr == lr )
 782                         *ttmplr = lr->lr_refnext;
 783         }
 784         ldap_free_request_int( ld, lr );
 785 }
 786
 787 /*
 788  * call first time with *cntp = -1
 789  * when returns *cntp == -1, no referrals are left
 790  *
 791  * NOTE: may replace *refsp, or shuffle the contents
 792  * of the original array.
 793  */
 794 static int ldap_int_nextref(
 795         LDAP                    *ld,
 796         char                    ***refsp,
 797         int                     *cntp,
 798         void                    *params )
 799 {
 800         assert( refsp != NULL );
 801         assert( *refsp != NULL );
 802         assert( cntp != NULL );
 803
 804         if ( *cntp < -1 ) {
 805                 *cntp = -1;
 806                 return -1;
 807         }
 808
 809         (*cntp)++;
 810
 811         if ( (*refsp)[ *cntp ] == NULL ) {
 812                 *cntp = -1;
 813         }
 814
 815         return 0;
 816 }
 817
 818 /*
 819  * Chase v3 referrals
 820  *
 821  * Parameters:
 822  *  (IN) ld = LDAP connection handle
 823  *  (IN) lr = LDAP Request structure
 824  *  (IN) refs = array of pointers to referral strings that we will chase
 825  *              The array will be free'd by this function when no longer needed
 826  *  (IN) sref != 0 if following search reference
 827  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 828  *  (OUT) hadrefp = 1 if sucessfully followed referral
 829  *
 830  * Return value - number of referrals followed
 831  */
 832 int
 833 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 834 {
 835         char            *unfollowed;
 836         int              unfollowedcnt = 0;
 837         LDAPRequest     *origreq;
 838         LDAPURLDesc     *srv = NULL;
 839         BerElement      *ber;
 840         char            **refarray = NULL;
 841         LDAPConn        *lc;
 842         int                      rc, count, i, j, id;
 843         LDAPreqinfo  rinfo;
 844
 845         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 846         *hadrefp = 0;
 847
 848         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 849
 850         unfollowed = NULL;
 851         rc = count = 0;
 852
 853         /* If no referrals in array, return */
 854         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 855                 rc = 0;
 856                 goto done;
 857         }
 858
 859         /* Check for hop limit exceeded */
 860         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 861                 Debug( LDAP_DEBUG_ANY,
 862                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 863                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 864                 rc = -1;
 865                 goto done;
 866         }
 867
 868         /* find original request */
 869         for ( origreq = lr;
 870                 origreq->lr_parent != NULL;
 871                 origreq = origreq->lr_parent )
 872         {
 873                 /* empty */ ;
 874         }
 875
 876         refarray = refs;
 877         refs = NULL;
 878
 879         if ( ld->ld_nextref_proc == NULL ) {
 880                 ld->ld_nextref_proc = ldap_int_nextref;
 881         }
 882
 883         /* parse out & follow referrals */
 884         i = -1;
 885         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 886                         i != -1;
 887                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 888         {
 889
 890                 /* Parse the referral URL */
 891                 rc = ldap_url_parse_ext( refarray[i], &srv, LDAP_PVT_URL_PARSE_NOEMPTY_DN );
 892                 if ( rc != LDAP_URL_SUCCESS ) {
 893                         /* ldap_url_parse_ext() returns LDAP_URL_* errors
 894                          * which do not map on API errors */
 895                         ld->ld_errno = LDAP_PARAM_ERROR;
 896                         rc = -1;
 897                         goto done;
 898                 }
 899
 900                 if( srv->lud_crit_exts ) {
 901                         /* we do not support any extensions */
 902                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 903                         rc = -1;
 904                         goto done;
 905                 }
 906
 907                 /* check connection for re-bind in progress */
 908                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 909                         /* See if we've already requested this DN with this conn */
 910                         LDAPRequest *lp;
 911                         int looped = 0;
 912                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 913                         for ( lp = origreq; lp; ) {
 914                                 if ( lp->lr_conn == lc
 915                                         && len == lp->lr_dn.bv_len
 916                                         && len
 917                                         && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
 918                                 {
 919                                         looped = 1;
 920                                         break;
 921                                 }
 922                                 if ( lp == origreq ) {
 923                                         lp = lp->lr_child;
 924                                 } else {
 925                                         lp = lr->lr_refnext;
 926                                 }
 927                         }
 928                         if ( looped ) {
 929                                 ldap_free_urllist( srv );
 930                                 srv = NULL;
 931                                 ld->ld_errno = LDAP_CLIENT_LOOP;
 932                                 rc = -1;
 933                                 continue;
 934                         }
 935
 936                         if ( lc->lconn_rebind_inprogress ) {
 937                                 /* We are already chasing a referral or search reference and a
 938                                  * bind on that connection is in progress.  We must queue
 939                                  * referrals on that connection, so we don't get a request
 940                                  * going out before the bind operation completes. This happens
 941                                  * if two search references come in one behind the other
 942                                  * for the same server with different contexts.
 943                                  */
 944                                 Debug( LDAP_DEBUG_TRACE,
 945                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 946                                         refarray[i], 0, 0);
 947                                 if( lc->lconn_rebind_queue == NULL ) {
 948                                         /* Create a referral list */
 949                                         lc->lconn_rebind_queue =
 950                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 951
 952                                         if( lc->lconn_rebind_queue == NULL) {
 953                                                 ld->ld_errno = LDAP_NO_MEMORY;
 954                                                 rc = -1;
 955                                                 goto done;
 956                                         }
 957
 958                                         lc->lconn_rebind_queue[0] = refarray;
 959                                         lc->lconn_rebind_queue[1] = NULL;
 960                                         refarray = NULL;
 961
 962                                 } else {
 963                                         /* Count how many referral arrays we already have */
 964                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 965                                                 /* empty */;
 966                                         }
 967
 968                                         /* Add the new referral to the list */
 969                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 970                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 971
 972                                         if( lc->lconn_rebind_queue == NULL ) {
 973                                                 ld->ld_errno = LDAP_NO_MEMORY;
 974                                                 rc = -1;
 975                                                 goto done;
 976                                         }
 977                                         lc->lconn_rebind_queue[j] = refarray;
 978                                         lc->lconn_rebind_queue[j+1] = NULL;
 979                                         refarray = NULL;
 980                                 }
 981
 982                                 /* We have queued the referral/reference, now just return */
 983                                 rc = 0;
 984                                 *hadrefp = 1;
 985                                 count = 1; /* Pretend we already followed referral */
 986                                 goto done;
 987                         }
 988                 }
 989                 /* Re-encode the request with the new starting point of the search.
 990                  * Note: In the future we also need to replace the filter if one
 991                  * was provided with the search reference
 992                  */
 993
 994                 /* For references we don't want old dn if new dn empty */
 995                 if ( sref && srv->lud_dn == NULL ) {
 996                         srv->lud_dn = LDAP_STRDUP( "" );
 997                 }
 998
 999                 LDAP_NEXT_MSGID( ld, id );
1000                 ber = re_encode_request( ld, origreq->lr_ber, id,
1001                         sref, srv, &rinfo.ri_request );
1002
1003                 if( ber == NULL ) {
1004                         ld->ld_errno = LDAP_ENCODING_ERROR;
1005                         rc = -1;
1006                         goto done;
1007                 }
1008
1009                 Debug( LDAP_DEBUG_TRACE,
1010                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
1011                         lr->lr_msgid, refarray[i], 0);
1012
1013                 /* Send the new request to the server - may require a bind */
1014                 rinfo.ri_msgid = origreq->lr_origid;
1015                 rinfo.ri_url = refarray[i];
1016 #ifdef LDAP_R_COMPILE
1017                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1018 #endif
1019                 rc = ldap_send_server_request( ld, ber, id,
1020                         origreq, &srv, NULL, &rinfo );
1021 #ifdef LDAP_R_COMPILE
1022                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1023 #endif
1024                 if ( rc < 0 ) {
1025                         /* Failure, try next referral in the list */
1026                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
1027                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1028                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
1029                         ldap_free_urllist( srv );
1030                         srv = NULL;
1031                         ld->ld_errno = LDAP_REFERRAL;
1032                 } else {
1033                         /* Success, no need to try this referral list further */
1034                         rc = 0;
1035                         ++count;
1036                         *hadrefp = 1;
1037
1038                         /* check if there is a queue of referrals that came in during bind */
1039                         if ( lc == NULL) {
1040                                 lc = find_connection( ld, srv, 1 );
1041                                 if ( lc == NULL ) {
1042                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
1043                                         rc = -1;
1044                                         goto done;
1045                                 }
1046                         }
1047
1048                         if ( lc->lconn_rebind_queue != NULL ) {
1049                                 /* Release resources of previous list */
1050                                 LDAP_VFREE( refarray );
1051                                 refarray = NULL;
1052                                 ldap_free_urllist( srv );
1053                                 srv = NULL;
1054
1055                                 /* Pull entries off end of queue so list always null terminated */
1056                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
1057                                         ;
1058                                 refarray = lc->lconn_rebind_queue[j - 1];
1059                                 lc->lconn_rebind_queue[j-1] = NULL;
1060                                 /* we pulled off last entry from queue, free queue */
1061                                 if ( j == 1 ) {
1062                                         LDAP_FREE( lc->lconn_rebind_queue );
1063                                         lc->lconn_rebind_queue = NULL;
1064                                 }
1065                                 /* restart the loop the with new referral list */
1066                                 i = -1;
1067                                 continue;
1068                         }
1069                         break; /* referral followed, break out of for loop */
1070                 }
1071         } /* end for loop */
1072 done:
1073         LDAP_VFREE( refarray );
1074         ldap_free_urllist( srv );
1075         LDAP_FREE( *errstrp );
1076
1077         if( rc == 0 ) {
1078                 *errstrp = NULL;
1079                 LDAP_FREE( unfollowed );
1080                 return count;
1081         } else {
1082                 *errstrp = unfollowed;
1083                 return rc;
1084         }
1085 }
1086
1087 /*
1088  * XXX merging of errors in this routine needs to be improved
1089  */
1090 int
1091 ldap_chase_referrals( LDAP *ld,
1092         LDAPRequest *lr,
1093         char **errstrp,
1094         int sref,
1095         int *hadrefp )
1096 {
1097         int             rc, count, id;
1098         unsigned        len;
1099         char            *p, *ref, *unfollowed;
1100         LDAPRequest     *origreq;
1101         LDAPURLDesc     *srv;
1102         BerElement      *ber;
1103         LDAPreqinfo  rinfo;
1104         LDAPConn        *lc;
1105
1106         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1107
1108         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
1109         *hadrefp = 0;
1110
1111         if ( *errstrp == NULL ) {
1112                 return( 0 );
1113         }
1114
1115         len = strlen( *errstrp );
1116         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1117                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1118                         *p = '\0';
1119                         p += LDAP_REF_STR_LEN;
1120                         break;
1121                 }
1122         }
1123
1124         if ( len < LDAP_REF_STR_LEN ) {
1125                 return( 0 );
1126         }
1127
1128         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1129                 Debug( LDAP_DEBUG_ANY,
1130                     "more than %d referral hops (dropping)\n",
1131                     ld->ld_refhoplimit, 0, 0 );
1132                     /* XXX report as error in ld->ld_errno? */
1133                     return( 0 );
1134         }
1135
1136         /* find original request */
1137         for ( origreq = lr; origreq->lr_parent != NULL;
1138              origreq = origreq->lr_parent ) {
1139                 /* empty */;
1140         }
1141
1142         unfollowed = NULL;
1143         rc = count = 0;
1144
1145         /* parse out & follow referrals */
1146         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1147                 p = strchr( ref, '\n' );
1148                 if ( p != NULL ) {
1149                         *p++ = '\0';
1150                 }
1151
1152                 rc = ldap_url_parse_ext( ref, &srv, LDAP_PVT_URL_PARSE_NOEMPTY_DN );
1153                 if ( rc != LDAP_URL_SUCCESS ) {
1154                         Debug( LDAP_DEBUG_TRACE,
1155                                 "ignoring %s referral <%s>\n",
1156                                 ref, rc == LDAP_URL_ERR_BADSCHEME ? "unknown" : "incorrect", 0 );
1157                         rc = ldap_append_referral( ld, &unfollowed, ref );
1158                         *hadrefp = 1;
1159                         continue;
1160                 }
1161
1162                 Debug( LDAP_DEBUG_TRACE,
1163                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1164
1165                 *hadrefp = 1;
1166
1167                 /* See if we've already been here */
1168                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1169                         LDAPRequest *lp;
1170                         int looped = 0;
1171                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1172                         for (lp = lr; lp; lp = lp->lr_parent ) {
1173                                 if ( lp->lr_conn == lc
1174                                         && len == lp->lr_dn.bv_len
1175                                         && len
1176                                         && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
1177                                 {
1178                                         looped = 1;
1179                                         break;
1180                                 }
1181                         }
1182                         if ( looped ) {
1183                                 ldap_free_urllist(srv);
1184                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1185                                 rc = -1;
1186                                 continue;
1187                         }
1188                 }
1189
1190                 LDAP_NEXT_MSGID( ld, id );
1191                 ber = re_encode_request( ld, origreq->lr_ber,
1192                     id, sref, srv, &rinfo.ri_request );
1193
1194                 if ( ber == NULL ) {
1195                         return -1 ;
1196                 }
1197
1198                 /* copy the complete referral for rebind process */
1199                 rinfo.ri_url = LDAP_STRDUP( ref );
1200
1201                 rinfo.ri_msgid = origreq->lr_origid;
1202
1203 #ifdef LDAP_R_COMPILE
1204                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1205 #endif
1206                 rc = ldap_send_server_request( ld, ber, id,
1207                         lr, &srv, NULL, &rinfo );
1208 #ifdef LDAP_R_COMPILE
1209                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1210 #endif
1211
1212                 LDAP_FREE( rinfo.ri_url );
1213
1214                 if( rc >= 0 ) {
1215                         ++count;
1216                 } else {
1217                         Debug( LDAP_DEBUG_ANY,
1218                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1219                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1220                         rc = ldap_append_referral( ld, &unfollowed, ref );
1221                 }
1222
1223                 ldap_free_urllist(srv);
1224         }
1225
1226         LDAP_FREE( *errstrp );
1227         *errstrp = unfollowed;
1228
1229         return(( rc == 0 ) ? count : rc );
1230 }
1231
1232
1233 int
1234 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1235 {
1236         int     first;
1237
1238         if ( *referralsp == NULL ) {
1239                 first = 1;
1240                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1241                     + 1 );
1242         } else {
1243                 first = 0;
1244                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1245                     strlen( *referralsp ) + strlen( s ) + 2 );
1246         }
1247
1248         if ( *referralsp == NULL ) {
1249                 ld->ld_errno = LDAP_NO_MEMORY;
1250                 return( -1 );
1251         }
1252
1253         if ( first ) {
1254                 strcpy( *referralsp, LDAP_REF_STR );
1255         } else {
1256                 strcat( *referralsp, "\n" );
1257         }
1258         strcat( *referralsp, s );
1259
1260         return( 0 );
1261 }
1262
1263
1264
1265 static BerElement *
1266 re_encode_request( LDAP *ld,
1267         BerElement *origber,
1268         ber_int_t msgid,
1269         int sref,
1270         LDAPURLDesc *srv,
1271         int *type )
1272 {
1273         /*
1274          * XXX this routine knows way too much about how the lber library works!
1275          */
1276         ber_int_t       along;
1277         ber_tag_t       tag;
1278         ber_tag_t       rtag;
1279         ber_int_t       ver;
1280         ber_int_t       scope;
1281         int             rc;
1282         BerElement      tmpber, *ber;
1283         struct berval           dn;
1284
1285         Debug( LDAP_DEBUG_TRACE,
1286             "re_encode_request: new msgid %ld, new dn <%s>\n",
1287             (long) msgid,
1288                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1289
1290         tmpber = *origber;
1291
1292         /*
1293          * all LDAP requests are sequences that start with a message id.
1294          * For all except delete, this is followed by a sequence that is
1295          * tagged with the operation code.  For delete, the provided DN
1296          * is not wrapped by a sequence.
1297          */
1298         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1299
1300         if ( rtag == LBER_ERROR ) {
1301                 ld->ld_errno = LDAP_DECODING_ERROR;
1302                 return( NULL );
1303         }
1304
1305         assert( tag != 0);
1306         if ( tag == LDAP_REQ_BIND ) {
1307                 /* bind requests have a version number before the DN & other stuff */
1308                 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &dn );
1309
1310         } else if ( tag == LDAP_REQ_DELETE ) {
1311                 /* delete requests don't have a DN wrapping sequence */
1312                 rtag = ber_scanf( &tmpber, "m", &dn );
1313
1314         } else if ( tag == LDAP_REQ_SEARCH ) {
1315                 /* search requests need to be re-scope-ed */
1316                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &dn, &scope );
1317
1318                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1319                         /* use the scope provided in reference */
1320                         scope = srv->lud_scope;
1321
1322                 } else if ( sref ) {
1323                         /* use scope implied by previous operation
1324                          *   base -> base
1325                          *   one -> base
1326                          *   subtree -> subtree
1327                          *   subordinate -> subtree
1328                          */
1329                         switch( scope ) {
1330                         default:
1331                         case LDAP_SCOPE_BASE:
1332                         case LDAP_SCOPE_ONELEVEL:
1333                                 scope = LDAP_SCOPE_BASE;
1334                                 break;
1335                         case LDAP_SCOPE_SUBTREE:
1336                         case LDAP_SCOPE_SUBORDINATE:
1337                                 scope = LDAP_SCOPE_SUBTREE;
1338                                 break;
1339                         }
1340                 }
1341
1342         } else {
1343                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &dn );
1344         }
1345
1346         if( rtag == LBER_ERROR ) {
1347                 ld->ld_errno = LDAP_DECODING_ERROR;
1348                 return NULL;
1349         }
1350
1351         /* restore character zero'd out by ber_scanf*/
1352         dn.bv_val[dn.bv_len] = tmpber.ber_tag;
1353
1354         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1355                 return NULL;
1356         }
1357
1358         if ( srv->lud_dn ) {
1359                 ber_str2bv( srv->lud_dn, 0, 0, &dn );
1360         }
1361
1362         if ( tag == LDAP_REQ_BIND ) {
1363                 rc = ber_printf( ber, "{it{iO" /*}}*/, msgid, tag, ver, &dn );
1364         } else if ( tag == LDAP_REQ_DELETE ) {
1365                 rc = ber_printf( ber, "{itON}", msgid, tag, &dn );
1366         } else if ( tag == LDAP_REQ_SEARCH ) {
1367                 rc = ber_printf( ber, "{it{Oe" /*}}*/, msgid, tag, &dn, scope );
1368         } else {
1369                 rc = ber_printf( ber, "{it{O" /*}}*/, msgid, tag, &dn );
1370         }
1371
1372         if ( rc == -1 ) {
1373                 ld->ld_errno = LDAP_ENCODING_ERROR;
1374                 ber_free( ber, 1 );
1375                 return NULL;
1376         }
1377
1378         if ( tag != LDAP_REQ_DELETE && (
1379                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1380                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1381             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1382         {
1383                 ld->ld_errno = LDAP_ENCODING_ERROR;
1384                 ber_free( ber, 1 );
1385                 return NULL;
1386         }
1387
1388 #ifdef LDAP_DEBUG
1389         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1390                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1391                     0, 0, 0 );
1392                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1393         }
1394 #endif /* LDAP_DEBUG */
1395
1396         *type = tag;    /* return request type */
1397         return ber;
1398 }
1399
1400
1401 LDAPRequest *
1402 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1403 {
1404         LDAPRequest     *lr;
1405
1406 #ifdef LDAP_R_COMPILE
1407         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1408 #endif
1409         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1410                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1411                         continue;       /* Skip completed requests */
1412                 }
1413                 if ( msgid == lr->lr_msgid ) {
1414                         break;
1415                 }
1416         }
1417 #ifdef LDAP_R_COMPILE
1418         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1419 #endif
1420
1421         return( lr );
1422 }
1423
1424