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         LDAPURLDesc     *srv;
 308
 309         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 310                 use_ldsb, connect, (bind != NULL) );
 311         /*
 312          * make a new LDAP server connection
 313          * XXX open connection synchronously for now
 314          */
 315         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 316         if ( lc == NULL ) {
 317                 ld->ld_errno = LDAP_NO_MEMORY;
 318                 return( NULL );
 319         }
 320
 321         if ( use_ldsb ) {
 322                 assert( ld->ld_sb != NULL );
 323                 lc->lconn_sb = ld->ld_sb;
 324
 325         } else {
 326                 lc->lconn_sb = ber_sockbuf_alloc();
 327                 if ( lc->lconn_sb == NULL ) {
 328                         LDAP_FREE( (char *)lc );
 329                         ld->ld_errno = LDAP_NO_MEMORY;
 330                         return( NULL );
 331                 }
 332         }
 333
 334         if ( connect ) {
 335                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 336                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 337                         {
 338                                 break;
 339                         }
 340                 }
 341
 342                 if ( srv == NULL ) {
 343                         if ( !use_ldsb ) {
 344                                 ber_sockbuf_free( lc->lconn_sb );
 345                         }
 346                         LDAP_FREE( (char *)lc );
 347                         ld->ld_errno = LDAP_SERVER_DOWN;
 348                         return( NULL );
 349                 }
 350
 351                 lc->lconn_server = ldap_url_dup( srv );
 352         }
 353
 354         lc->lconn_status = LDAP_CONNST_CONNECTED;
 355 #ifdef LDAP_R_COMPILE
 356         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 357 #endif
 358         lc->lconn_next = ld->ld_conns;
 359         ld->ld_conns = lc;
 360 #ifdef LDAP_R_COMPILE
 361         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 362 #endif
 363
 364         /*
 365          * XXX for now, we always do a synchronous bind.  This will have
 366          * to change in the long run...
 367          */
 368         if ( bind != NULL) {
 369                 int             err = 0;
 370                 LDAPConn        *savedefconn;
 371
 372                 /* Set flag to prevent additional referrals
 373                  * from being processed on this
 374                  * connection until the bind has completed
 375                  */
 376                 lc->lconn_rebind_inprogress = 1;
 377                 /* V3 rebind function */
 378                 if ( ld->ld_rebind_proc != NULL) {
 379                         LDAPURLDesc     *srvfunc;
 380
 381                         srvfunc = ldap_url_dup( srvlist );
 382                         if ( srvfunc == NULL ) {
 383                                 ld->ld_errno = LDAP_NO_MEMORY;
 384                                 err = -1;
 385                         } else {
 386                                 savedefconn = ld->ld_defconn;
 387                                 ++lc->lconn_refcnt;     /* avoid premature free */
 388                                 ld->ld_defconn = lc;
 389
 390                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 391 #ifdef LDAP_R_COMPILE
 392                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 393                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 394 #endif
 395                                 err = (*ld->ld_rebind_proc)( ld,
 396                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 397                                         ld->ld_rebind_params );
 398 #ifdef LDAP_R_COMPILE
 399                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 400                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 401 #endif
 402
 403                                 ld->ld_defconn = savedefconn;
 404                                 --lc->lconn_refcnt;
 405
 406                                 if ( err != 0 ) {
 407                                         err = -1;
 408                                         ldap_free_connection( ld, lc, 1, 0 );
 409                                         lc = NULL;
 410                                 }
 411                                 ldap_free_urldesc( srvfunc );
 412                         }
 413                 } else {
 414                         int             msgid, rc;
 415                         struct berval   passwd = BER_BVNULL;
 416
 417                         savedefconn = ld->ld_defconn;
 418                         ++lc->lconn_refcnt;     /* avoid premature free */
 419                         ld->ld_defconn = lc;
 420
 421                         Debug( LDAP_DEBUG_TRACE, "anonymous rebind via ldap_bind_s\n", 0, 0, 0);
 422 #ifdef LDAP_R_COMPILE
 423                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 424                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 425 #endif
 426                         rc = ldap_sasl_bind( ld, "", LDAP_SASL_SIMPLE, &passwd,
 427                                 NULL, NULL, &msgid );
 428                         if ( rc != LDAP_SUCCESS ) {
 429                                 err = -1;
 430
 431                         } else {
 432                                 for ( err = 1; err > 0; ) {
 433                                         struct timeval  tv = { 0, 100000 };
 434                                         LDAPMessage     *res = NULL;
 435
 436                                         switch ( ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 437                                         case -1:
 438                                                 err = -1;
 439                                                 break;
 440
 441                                         case 0:
 442 #ifdef LDAP_R_COMPILE
 443                                                 ldap_pvt_thread_yield();
 444 #endif
 445                                                 break;
 446
 447                                         case LDAP_RES_BIND:
 448                                                 rc = ldap_parse_result( ld, res, &err, NULL, NULL, NULL, NULL, 1 );
 449                                                 if ( rc != LDAP_SUCCESS ) {
 450                                                         err = -1;
 451
 452                                                 } else if ( err != LDAP_SUCCESS ) {
 453                                                         err = -1;
 454                                                 }
 455                                                 /* else err == LDAP_SUCCESS == 0 */
 456                                                 break;
 457
 458                                         default:
 459                                                 assert( 0 );
 460                                         }
 461                                 }
 462                         }
 463 #ifdef LDAP_R_COMPILE
 464                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 465                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 466 #endif
 467                         ld->ld_defconn = savedefconn;
 468                         --lc->lconn_refcnt;
 469
 470                         if ( err != 0 ) {
 471                                 ldap_free_connection( ld, lc, 1, 0 );
 472                                 lc = NULL;
 473                         }
 474                 }
 475                 if ( lc != NULL )
 476                         lc->lconn_rebind_inprogress = 0;
 477         }
 478
 479         return( lc );
 480 }
 481
 482
 483 static LDAPConn *
 484 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 485 /*
 486  * return an existing connection (if any) to the server srv
 487  * if "any" is non-zero, check for any server in the "srv" chain
 488  */
 489 {
 490         LDAPConn        *lc;
 491         LDAPURLDesc     *lcu, *lsu;
 492         int lcu_port, lsu_port;
 493         int found = 0;
 494
 495 #ifdef LDAP_R_COMPILE
 496         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 497 #endif
 498         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 499                 lcu = lc->lconn_server;
 500                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 501                         lcu->lud_port );
 502
 503                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 504                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 505                                 lsu->lud_port );
 506
 507                         if ( lsu_port == lcu_port
 508                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 509                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 510                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 511                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 512                         {
 513                                 found = 1;
 514                                 break;
 515                         }
 516
 517                         if ( !any ) break;
 518                 }
 519                 if ( found )
 520                         break;
 521         }
 522 #ifdef LDAP_R_COMPILE
 523         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 524 #endif
 525         return lc;
 526 }
 527
 528
 529
 530 static void
 531 use_connection( LDAP *ld, LDAPConn *lc )
 532 {
 533         ++lc->lconn_refcnt;
 534         lc->lconn_lastused = time( NULL );
 535 }
 536
 537
 538 void
 539 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 540 {
 541         LDAPConn        *tmplc, *prevlc;
 542
 543         Debug( LDAP_DEBUG_TRACE,
 544                 "ldap_free_connection %d %d\n",
 545                 force, unbind, 0 );
 546
 547         if ( force || --lc->lconn_refcnt <= 0 ) {
 548                 /* remove from connections list first */
 549 #ifdef LDAP_R_COMPILE
 550                 ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 551 #endif
 552
 553                 for ( prevlc = NULL, tmplc = ld->ld_conns;
 554                         tmplc != NULL;
 555                         tmplc = tmplc->lconn_next )
 556                 {
 557                         if ( tmplc == lc ) {
 558                                 if ( prevlc == NULL ) {
 559                                     ld->ld_conns = tmplc->lconn_next;
 560                                 } else {
 561                                     prevlc->lconn_next = tmplc->lconn_next;
 562                                 }
 563                                 break;
 564                         }
 565                         prevlc = tmplc;
 566                 }
 567 #ifdef LDAP_R_COMPILE
 568                 ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 569 #endif
 570
 571                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 572                         ldap_mark_select_clear( ld, lc->lconn_sb );
 573                         if ( unbind ) {
 574                                 ldap_send_unbind( ld, lc->lconn_sb,
 575                                                 NULL, NULL );
 576                         }
 577                 }
 578
 579                 if ( lc->lconn_ber != NULL ) {
 580                         ber_free( lc->lconn_ber, 1 );
 581                 }
 582
 583                 ldap_int_sasl_close( ld, lc );
 584
 585                 ldap_free_urllist( lc->lconn_server );
 586 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 587                 if ( lc->lconn_krbinstance != NULL ) {
 588                         LDAP_FREE( lc->lconn_krbinstance );
 589                 }
 590 #endif
 591
 592                 /* FIXME: is this at all possible? */
 593                 if ( force ) {
 594                         LDAPRequest     *lr;
 595
 596                         for ( lr = ld->ld_requests; lr; ) {
 597                                 LDAPRequest     *lr_next = lr->lr_next;
 598
 599                                 if ( lr->lr_conn == lc ) {
 600                                         ldap_free_request_int( ld, lr );
 601                                 }
 602
 603                                 lr = lr_next;
 604                         }
 605                 }
 606
 607                 if ( lc->lconn_sb != ld->ld_sb ) {
 608                         ber_sockbuf_free( lc->lconn_sb );
 609                 }
 610
 611                 if ( lc->lconn_rebind_queue != NULL) {
 612                         int i;
 613                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 614                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 615                         }
 616                         LDAP_FREE( lc->lconn_rebind_queue );
 617                 }
 618
 619                 LDAP_FREE( lc );
 620
 621                 Debug( LDAP_DEBUG_TRACE,
 622                         "ldap_free_connection: actually freed\n",
 623                         0, 0, 0 );
 624
 625         } else {
 626                 lc->lconn_lastused = time( NULL );
 627                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 628                                 lc->lconn_refcnt, 0, 0 );
 629         }
 630 }
 631
 632
 633 #ifdef LDAP_DEBUG
 634 void
 635 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 636 {
 637         LDAPConn        *lc;
 638         char            timebuf[32];
 639
 640         fprintf( stderr, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "" );
 641         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 642                 if ( lc->lconn_server != NULL ) {
 643                         fprintf( stderr, "* host: %s  port: %d%s\n",
 644                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 645                             : lc->lconn_server->lud_host,
 646                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 647                             ld->ld_sb ) ? "  (default)" : "" );
 648                 }
 649                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 650                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 651                     "NeedSocket" : ( lc->lconn_status ==
 652                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 653                 fprintf( stderr, "  last used: %s",
 654                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 655                 if( lc->lconn_rebind_inprogress ) {
 656                         fprintf( stderr, "  rebind in progress\n");
 657                         if( lc->lconn_rebind_queue != NULL) {
 658                                 int i = 0;
 659                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 660                                         int j = 0;
 661                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 662                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 663                                                         i, j, lc->lconn_rebind_queue[i][j]);
 664                                         }
 665                                 }
 666                         } else {
 667                                 fprintf( stderr, "    queue is empty\n");
 668                         }
 669                 }
 670                 fprintf(stderr, "\n");
 671                 if ( !all ) {
 672                         break;
 673                 }
 674         }
 675 }
 676
 677
 678 void
 679 ldap_dump_requests_and_responses( LDAP *ld )
 680 {
 681         LDAPRequest     *lr;
 682         LDAPMessage     *lm, *l;
 683
 684 #ifdef LDAP_R_COMPILE
 685         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 686 #endif
 687         fprintf( stderr, "** ld %p Outstanding Requests:\n", (void *)ld );
 688         if (( lr = ld->ld_requests ) == NULL ) {
 689                 fprintf( stderr, "   Empty\n" );
 690         }
 691         for ( ; lr != NULL; lr = lr->lr_next ) {
 692             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 693                 lr->lr_msgid, lr->lr_origid,
 694                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 695                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 696                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 697                 ( lr->lr_status == LDAP_REQST_WRITING ) ? "Writing" :
 698                 ( lr->lr_status == LDAP_REQST_COMPLETED ) ? "RequestCompleted"
 699                         : "InvalidStatus");
 700             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 701                     lr->lr_outrefcnt, lr->lr_parentcnt );
 702         }
 703 #ifdef LDAP_R_COMPILE
 704         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 705 #endif
 706         fprintf( stderr, "** ld %p Response Queue:\n", (void *)ld );
 707         if (( lm = ld->ld_responses ) == NULL ) {
 708                 fprintf( stderr, "   Empty\n" );
 709         }
 710         for ( ; lm != NULL; lm = lm->lm_next ) {
 711                 fprintf( stderr, " * msgid %d,  type %lu\n",
 712                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 713                 if (( l = lm->lm_chain ) != NULL ) {
 714                         fprintf( stderr, "   chained responses:\n" );
 715                         for ( ; l != NULL; l = l->lm_chain ) {
 716                                 fprintf( stderr,
 717                                     "  * msgid %d,  type %lu\n",
 718                                     l->lm_msgid,
 719                                     (unsigned long) l->lm_msgtype );
 720                         }
 721                 }
 722         }
 723 }
 724 #endif /* LDAP_DEBUG */
 725
 726 static void
 727 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 728 {
 729         if ( lr->lr_prev == NULL ) {
 730                 /* free'ing the first request? */
 731                 assert( ld->ld_requests == lr );
 732                 ld->ld_requests = lr->lr_next;
 733
 734         } else {
 735                 lr->lr_prev->lr_next = lr->lr_next;
 736         }
 737
 738         if ( lr->lr_next != NULL ) {
 739                 lr->lr_next->lr_prev = lr->lr_prev;
 740         }
 741
 742         if ( lr->lr_ber != NULL ) {
 743                 ber_free( lr->lr_ber, 1 );
 744                 lr->lr_ber = NULL;
 745         }
 746
 747         if ( lr->lr_res_error != NULL ) {
 748                 LDAP_FREE( lr->lr_res_error );
 749                 lr->lr_res_error = NULL;
 750         }
 751
 752         if ( lr->lr_res_matched != NULL ) {
 753                 LDAP_FREE( lr->lr_res_matched );
 754                 lr->lr_res_matched = NULL;
 755         }
 756
 757         LDAP_FREE( lr );
 758 }
 759
 760 void
 761 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 762 {
 763         LDAPRequest     **ttmplr;
 764 #ifdef LDAP_R_COMPILE
 765         LDAP_PVT_THREAD_ASSERT_MUTEX_OWNER( &ld->ld_req_mutex );
 766 #endif
 767
 768         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 769                 lr->lr_origid, lr->lr_msgid, 0 );
 770
 771         /* free all referrals (child requests) */
 772         while ( lr->lr_child )
 773                 ldap_free_request( ld, lr->lr_child );
 774
 775         if ( lr->lr_parent != NULL ) {
 776                 --lr->lr_parent->lr_outrefcnt;
 777                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 778                 if ( *ttmplr == lr )
 779                         *ttmplr = lr->lr_refnext;
 780         }
 781         ldap_free_request_int( ld, lr );
 782 }
 783
 784 /*
 785  * call first time with *cntp = -1
 786  * when returns *cntp == -1, no referrals are left
 787  *
 788  * NOTE: may replace *refsp, or shuffle the contents
 789  * of the original array.
 790  */
 791 static int ldap_int_nextref(
 792         LDAP                    *ld,
 793         char                    ***refsp,
 794         int                     *cntp,
 795         void                    *params )
 796 {
 797         assert( refsp != NULL );
 798         assert( *refsp != NULL );
 799         assert( cntp != NULL );
 800
 801         if ( *cntp < -1 ) {
 802                 *cntp = -1;
 803                 return -1;
 804         }
 805
 806         (*cntp)++;
 807
 808         if ( (*refsp)[ *cntp ] == NULL ) {
 809                 *cntp = -1;
 810         }
 811
 812         return 0;
 813 }
 814
 815 /*
 816  * Chase v3 referrals
 817  *
 818  * Parameters:
 819  *  (IN) ld = LDAP connection handle
 820  *  (IN) lr = LDAP Request structure
 821  *  (IN) refs = array of pointers to referral strings that we will chase
 822  *              The array will be free'd by this function when no longer needed
 823  *  (IN) sref != 0 if following search reference
 824  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 825  *  (OUT) hadrefp = 1 if sucessfully followed referral
 826  *
 827  * Return value - number of referrals followed
 828  */
 829 int
 830 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 831 {
 832         char            *unfollowed;
 833         int              unfollowedcnt = 0;
 834         LDAPRequest     *origreq;
 835         LDAPURLDesc     *srv = NULL;
 836         BerElement      *ber;
 837         char            **refarray = NULL;
 838         LDAPConn        *lc;
 839         int                      rc, count, i, j, id;
 840         LDAPreqinfo  rinfo;
 841
 842         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 843         *hadrefp = 0;
 844
 845         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 846
 847         unfollowed = NULL;
 848         rc = count = 0;
 849
 850         /* If no referrals in array, return */
 851         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 852                 rc = 0;
 853                 goto done;
 854         }
 855
 856         /* Check for hop limit exceeded */
 857         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 858                 Debug( LDAP_DEBUG_ANY,
 859                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 860                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 861                 rc = -1;
 862                 goto done;
 863         }
 864
 865         /* find original request */
 866         for ( origreq = lr;
 867                 origreq->lr_parent != NULL;
 868                 origreq = origreq->lr_parent )
 869         {
 870                 /* empty */ ;
 871         }
 872
 873         refarray = refs;
 874         refs = NULL;
 875
 876         if ( ld->ld_nextref_proc == NULL ) {
 877                 ld->ld_nextref_proc = ldap_int_nextref;
 878         }
 879
 880         /* parse out & follow referrals */
 881         i = -1;
 882         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 883                         i != -1;
 884                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 885         {
 886
 887                 /* Parse the referral URL */
 888                 rc = ldap_url_parse_ext( refarray[i], &srv );
 889                 if ( rc != LDAP_URL_SUCCESS ) {
 890                         /* ldap_url_parse_ext() returns LDAP_URL_* errors
 891                          * which do not map on API errors */
 892                         ld->ld_errno = LDAP_PARAM_ERROR;
 893                         rc = -1;
 894                         goto done;
 895                 }
 896
 897                 if( srv->lud_crit_exts ) {
 898                         /* we do not support any extensions */
 899                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 900                         rc = -1;
 901                         goto done;
 902                 }
 903
 904                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 905                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 906                         LDAP_FREE( srv->lud_dn );
 907                         srv->lud_dn = NULL;
 908                 }
 909
 910                 /* check connection for re-bind in progress */
 911                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 912                         /* See if we've already requested this DN with this conn */
 913                         LDAPRequest *lp;
 914                         int looped = 0;
 915                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 916                         for ( lp = origreq; lp; ) {
 917                                 if ( lp->lr_conn == lc
 918                                         && len == lp->lr_dn.bv_len
 919                                         && len
 920                                         && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
 921                                 {
 922                                         looped = 1;
 923                                         break;
 924                                 }
 925                                 if ( lp == origreq ) {
 926                                         lp = lp->lr_child;
 927                                 } else {
 928                                         lp = lr->lr_refnext;
 929                                 }
 930                         }
 931                         if ( looped ) {
 932                                 ldap_free_urllist( srv );
 933                                 srv = NULL;
 934                                 ld->ld_errno = LDAP_CLIENT_LOOP;
 935                                 rc = -1;
 936                                 continue;
 937                         }
 938
 939                         if ( lc->lconn_rebind_inprogress ) {
 940                                 /* We are already chasing a referral or search reference and a
 941                                  * bind on that connection is in progress.  We must queue
 942                                  * referrals on that connection, so we don't get a request
 943                                  * going out before the bind operation completes. This happens
 944                                  * if two search references come in one behind the other
 945                                  * for the same server with different contexts.
 946                                  */
 947                                 Debug( LDAP_DEBUG_TRACE,
 948                                         "ldap_chase_v3referrals: queue referral \"%s\"\n",
 949                                         refarray[i], 0, 0);
 950                                 if( lc->lconn_rebind_queue == NULL ) {
 951                                         /* Create a referral list */
 952                                         lc->lconn_rebind_queue =
 953                                                 (char ***) LDAP_MALLOC( sizeof(void *) * 2);
 954
 955                                         if( lc->lconn_rebind_queue == NULL) {
 956                                                 ld->ld_errno = LDAP_NO_MEMORY;
 957                                                 rc = -1;
 958                                                 goto done;
 959                                         }
 960
 961                                         lc->lconn_rebind_queue[0] = refarray;
 962                                         lc->lconn_rebind_queue[1] = NULL;
 963                                         refarray = NULL;
 964
 965                                 } else {
 966                                         /* Count how many referral arrays we already have */
 967                                         for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++) {
 968                                                 /* empty */;
 969                                         }
 970
 971                                         /* Add the new referral to the list */
 972                                         lc->lconn_rebind_queue = (char ***) LDAP_REALLOC(
 973                                                 lc->lconn_rebind_queue, sizeof(void *) * (j + 2));
 974
 975                                         if( lc->lconn_rebind_queue == NULL ) {
 976                                                 ld->ld_errno = LDAP_NO_MEMORY;
 977                                                 rc = -1;
 978                                                 goto done;
 979                                         }
 980                                         lc->lconn_rebind_queue[j] = refarray;
 981                                         lc->lconn_rebind_queue[j+1] = NULL;
 982                                         refarray = NULL;
 983                                 }
 984
 985                                 /* We have queued the referral/reference, now just return */
 986                                 rc = 0;
 987                                 *hadrefp = 1;
 988                                 count = 1; /* Pretend we already followed referral */
 989                                 goto done;
 990                         }
 991                 }
 992                 /* Re-encode the request with the new starting point of the search.
 993                  * Note: In the future we also need to replace the filter if one
 994                  * was provided with the search reference
 995                  */
 996
 997                 /* For references we don't want old dn if new dn empty */
 998                 if ( sref && srv->lud_dn == NULL ) {
 999                         srv->lud_dn = LDAP_STRDUP( "" );
1000                 }
1001
1002                 LDAP_NEXT_MSGID( ld, id );
1003                 ber = re_encode_request( ld, origreq->lr_ber, id,
1004                         sref, srv, &rinfo.ri_request );
1005
1006                 if( ber == NULL ) {
1007                         ld->ld_errno = LDAP_ENCODING_ERROR;
1008                         rc = -1;
1009                         goto done;
1010                 }
1011
1012                 Debug( LDAP_DEBUG_TRACE,
1013                         "ldap_chase_v3referral: msgid %d, url \"%s\"\n",
1014                         lr->lr_msgid, refarray[i], 0);
1015
1016                 /* Send the new request to the server - may require a bind */
1017                 rinfo.ri_msgid = origreq->lr_origid;
1018                 rinfo.ri_url = refarray[i];
1019 #ifdef LDAP_R_COMPILE
1020                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1021 #endif
1022                 rc = ldap_send_server_request( ld, ber, id,
1023                         origreq, srv, NULL, &rinfo );
1024 #ifdef LDAP_R_COMPILE
1025                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1026 #endif
1027                 if ( rc < 0 ) {
1028                         /* Failure, try next referral in the list */
1029                         Debug( LDAP_DEBUG_ANY, "Unable to chase referral \"%s\" (%d: %s)\n",
1030                                 refarray[i], ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1031                         unfollowedcnt += ldap_append_referral( ld, &unfollowed, refarray[i] );
1032                         ldap_free_urllist( srv );
1033                         srv = NULL;
1034                         ld->ld_errno = LDAP_REFERRAL;
1035                 } else {
1036                         /* Success, no need to try this referral list further */
1037                         rc = 0;
1038                         ++count;
1039                         *hadrefp = 1;
1040
1041                         /* check if there is a queue of referrals that came in during bind */
1042                         if ( lc == NULL) {
1043                                 lc = find_connection( ld, srv, 1 );
1044                                 if ( lc == NULL ) {
1045                                         ld->ld_errno = LDAP_OPERATIONS_ERROR;
1046                                         rc = -1;
1047                                         goto done;
1048                                 }
1049                         }
1050
1051                         if ( lc->lconn_rebind_queue != NULL ) {
1052                                 /* Release resources of previous list */
1053                                 LDAP_VFREE( refarray );
1054                                 refarray = NULL;
1055                                 ldap_free_urllist( srv );
1056                                 srv = NULL;
1057
1058                                 /* Pull entries off end of queue so list always null terminated */
1059                                 for( j = 0; lc->lconn_rebind_queue[j] != NULL; j++ )
1060                                         ;
1061                                 refarray = lc->lconn_rebind_queue[j - 1];
1062                                 lc->lconn_rebind_queue[j-1] = NULL;
1063                                 /* we pulled off last entry from queue, free queue */
1064                                 if ( j == 1 ) {
1065                                         LDAP_FREE( lc->lconn_rebind_queue );
1066                                         lc->lconn_rebind_queue = NULL;
1067                                 }
1068                                 /* restart the loop the with new referral list */
1069                                 i = -1;
1070                                 continue;
1071                         }
1072                         break; /* referral followed, break out of for loop */
1073                 }
1074         } /* end for loop */
1075 done:
1076         LDAP_VFREE( refarray );
1077         ldap_free_urllist( srv );
1078         LDAP_FREE( *errstrp );
1079
1080         if( rc == 0 ) {
1081                 *errstrp = NULL;
1082                 LDAP_FREE( unfollowed );
1083                 return count;
1084         } else {
1085                 *errstrp = unfollowed;
1086                 return rc;
1087         }
1088 }
1089
1090 /*
1091  * XXX merging of errors in this routine needs to be improved
1092  */
1093 int
1094 ldap_chase_referrals( LDAP *ld,
1095         LDAPRequest *lr,
1096         char **errstrp,
1097         int sref,
1098         int *hadrefp )
1099 {
1100         int             rc, count, id;
1101         unsigned        len;
1102         char            *p, *ref, *unfollowed;
1103         LDAPRequest     *origreq;
1104         LDAPURLDesc     *srv;
1105         BerElement      *ber;
1106         LDAPreqinfo  rinfo;
1107         LDAPConn        *lc;
1108
1109         Debug( LDAP_DEBUG_TRACE, "ldap_chase_referrals\n", 0, 0, 0 );
1110
1111         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
1112         *hadrefp = 0;
1113
1114         if ( *errstrp == NULL ) {
1115                 return( 0 );
1116         }
1117
1118         len = strlen( *errstrp );
1119         for ( p = *errstrp; len >= LDAP_REF_STR_LEN; ++p, --len ) {
1120                 if ( strncasecmp( p, LDAP_REF_STR, LDAP_REF_STR_LEN ) == 0 ) {
1121                         *p = '\0';
1122                         p += LDAP_REF_STR_LEN;
1123                         break;
1124                 }
1125         }
1126
1127         if ( len < LDAP_REF_STR_LEN ) {
1128                 return( 0 );
1129         }
1130
1131         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
1132                 Debug( LDAP_DEBUG_ANY,
1133                     "more than %d referral hops (dropping)\n",
1134                     ld->ld_refhoplimit, 0, 0 );
1135                     /* XXX report as error in ld->ld_errno? */
1136                     return( 0 );
1137         }
1138
1139         /* find original request */
1140         for ( origreq = lr; origreq->lr_parent != NULL;
1141              origreq = origreq->lr_parent ) {
1142                 /* empty */;
1143         }
1144
1145         unfollowed = NULL;
1146         rc = count = 0;
1147
1148         /* parse out & follow referrals */
1149         for ( ref = p; rc == 0 && ref != NULL; ref = p ) {
1150                 p = strchr( ref, '\n' );
1151                 if ( p != NULL ) {
1152                         *p++ = '\0';
1153                 }
1154
1155                 rc = ldap_url_parse_ext( ref, &srv );
1156                 if ( rc != LDAP_URL_SUCCESS ) {
1157                         Debug( LDAP_DEBUG_TRACE,
1158                                 "ignoring %s referral <%s>\n",
1159                                 ref, rc == LDAP_URL_ERR_BADSCHEME ? "unknown" : "incorrect", 0 );
1160                         rc = ldap_append_referral( ld, &unfollowed, ref );
1161                         *hadrefp = 1;
1162                         continue;
1163                 }
1164
1165                 if ( srv->lud_dn != NULL && srv->lud_dn == '\0' ) {
1166                         LDAP_FREE( srv->lud_dn );
1167                         srv->lud_dn = NULL;
1168                 }
1169
1170                 Debug( LDAP_DEBUG_TRACE,
1171                     "chasing LDAP referral: <%s>\n", ref, 0, 0 );
1172
1173                 *hadrefp = 1;
1174
1175                 /* See if we've already been here */
1176                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
1177                         LDAPRequest *lp;
1178                         int looped = 0;
1179                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
1180                         for (lp = lr; lp; lp = lp->lr_parent ) {
1181                                 if ( lp->lr_conn == lc
1182                                         && len == lp->lr_dn.bv_len
1183                                         && len
1184                                         && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
1185                                 {
1186                                         looped = 1;
1187                                         break;
1188                                 }
1189                         }
1190                         if ( looped ) {
1191                                 ldap_free_urllist(srv);
1192                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1193                                 rc = -1;
1194                                 continue;
1195                         }
1196                 }
1197
1198                 LDAP_NEXT_MSGID( ld, id );
1199                 ber = re_encode_request( ld, origreq->lr_ber,
1200                     id, sref, srv, &rinfo.ri_request );
1201
1202                 if ( ber == NULL ) {
1203                         return -1 ;
1204                 }
1205
1206                 /* copy the complete referral for rebind process */
1207                 rinfo.ri_url = LDAP_STRDUP( ref );
1208
1209                 rinfo.ri_msgid = origreq->lr_origid;
1210
1211 #ifdef LDAP_R_COMPILE
1212                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1213 #endif
1214                 rc = ldap_send_server_request( ld, ber, id,
1215                         lr, srv, NULL, &rinfo );
1216 #ifdef LDAP_R_COMPILE
1217                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1218 #endif
1219
1220                 LDAP_FREE( rinfo.ri_url );
1221
1222                 if( rc >= 0 ) {
1223                         ++count;
1224                 } else {
1225                         Debug( LDAP_DEBUG_ANY,
1226                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1227                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1228                         rc = ldap_append_referral( ld, &unfollowed, ref );
1229                 }
1230
1231                 ldap_free_urllist(srv);
1232         }
1233
1234         LDAP_FREE( *errstrp );
1235         *errstrp = unfollowed;
1236
1237         return(( rc == 0 ) ? count : rc );
1238 }
1239
1240
1241 int
1242 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1243 {
1244         int     first;
1245
1246         if ( *referralsp == NULL ) {
1247                 first = 1;
1248                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1249                     + 1 );
1250         } else {
1251                 first = 0;
1252                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1253                     strlen( *referralsp ) + strlen( s ) + 2 );
1254         }
1255
1256         if ( *referralsp == NULL ) {
1257                 ld->ld_errno = LDAP_NO_MEMORY;
1258                 return( -1 );
1259         }
1260
1261         if ( first ) {
1262                 strcpy( *referralsp, LDAP_REF_STR );
1263         } else {
1264                 strcat( *referralsp, "\n" );
1265         }
1266         strcat( *referralsp, s );
1267
1268         return( 0 );
1269 }
1270
1271
1272
1273 static BerElement *
1274 re_encode_request( LDAP *ld,
1275         BerElement *origber,
1276         ber_int_t msgid,
1277         int sref,
1278         LDAPURLDesc *srv,
1279         int *type )
1280 {
1281         /*
1282          * XXX this routine knows way too much about how the lber library works!
1283          */
1284         ber_int_t       along;
1285         ber_tag_t       tag;
1286         ber_tag_t       rtag;
1287         ber_int_t       ver;
1288         ber_int_t       scope;
1289         int             rc;
1290         BerElement      tmpber, *ber;
1291         struct berval           orig_dn;
1292         char            *dn;
1293
1294         Debug( LDAP_DEBUG_TRACE,
1295             "re_encode_request: new msgid %ld, new dn <%s>\n",
1296             (long) msgid,
1297                 ( srv == NULL || srv->lud_dn == NULL) ? "NONE" : srv->lud_dn, 0 );
1298
1299         tmpber = *origber;
1300
1301         /*
1302          * all LDAP requests are sequences that start with a message id.
1303          * For all except delete, this is followed by a sequence that is
1304          * tagged with the operation code.  For delete, the provided DN
1305          * is not wrapped by a sequence.
1306          */
1307         rtag = ber_scanf( &tmpber, "{it", /*}*/ &along, &tag );
1308
1309         if ( rtag == LBER_ERROR ) {
1310                 ld->ld_errno = LDAP_DECODING_ERROR;
1311                 return( NULL );
1312         }
1313
1314         assert( tag != 0);
1315         if ( tag == LDAP_REQ_BIND ) {
1316                 /* bind requests have a version number before the DN & other stuff */
1317                 rtag = ber_scanf( &tmpber, "{im" /*}*/, &ver, &orig_dn );
1318
1319         } else if ( tag == LDAP_REQ_DELETE ) {
1320                 /* delete requests don't have a DN wrapping sequence */
1321                 rtag = ber_scanf( &tmpber, "m", &orig_dn );
1322
1323         } else if ( tag == LDAP_REQ_SEARCH ) {
1324                 /* search requests need to be re-scope-ed */
1325                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &orig_dn, &scope );
1326
1327                 if( srv->lud_scope != LDAP_SCOPE_DEFAULT ) {
1328                         /* use the scope provided in reference */
1329                         scope = srv->lud_scope;
1330
1331                 } else if ( sref ) {
1332                         /* use scope implied by previous operation
1333                          *   base -> base
1334                          *   one -> base
1335                          *   subtree -> subtree
1336                          *   subordinate -> subtree
1337                          */
1338                         switch( scope ) {
1339                         default:
1340                         case LDAP_SCOPE_BASE:
1341                         case LDAP_SCOPE_ONELEVEL:
1342                                 scope = LDAP_SCOPE_BASE;
1343                                 break;
1344                         case LDAP_SCOPE_SUBTREE:
1345                         case LDAP_SCOPE_SUBORDINATE:
1346                                 scope = LDAP_SCOPE_SUBTREE;
1347                                 break;
1348                         }
1349                 }
1350
1351         } else {
1352                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &orig_dn );
1353         }
1354
1355         if( rtag == LBER_ERROR ) {
1356                 ld->ld_errno = LDAP_DECODING_ERROR;
1357                 return NULL;
1358         }
1359
1360         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1361                 return NULL;
1362         }
1363
1364         if ( srv->lud_dn == NULL ) {
1365                 dn = orig_dn.bv_val;
1366         } else {
1367                 dn = srv->lud_dn;
1368         }
1369
1370         if ( tag == LDAP_REQ_BIND ) {
1371                 rc = ber_printf( ber, "{it{is" /*}}*/, msgid, tag, ver, dn );
1372         } else if ( tag == LDAP_REQ_DELETE ) {
1373                 rc = ber_printf( ber, "{itsN}", msgid, tag, dn );
1374         } else if ( tag == LDAP_REQ_SEARCH ) {
1375                 rc = ber_printf( ber, "{it{se" /*}}*/, msgid, tag, dn, scope );
1376         } else {
1377                 rc = ber_printf( ber, "{it{s" /*}}*/, msgid, tag, dn );
1378         }
1379
1380         if ( rc == -1 ) {
1381                 ld->ld_errno = LDAP_ENCODING_ERROR;
1382                 ber_free( ber, 1 );
1383                 return NULL;
1384         }
1385
1386         if ( tag != LDAP_REQ_DELETE && (
1387                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1388                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1389             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1390         {
1391                 ld->ld_errno = LDAP_ENCODING_ERROR;
1392                 ber_free( ber, 1 );
1393                 return NULL;
1394         }
1395
1396 #ifdef LDAP_DEBUG
1397         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1398                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1399                     0, 0, 0 );
1400                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1401         }
1402 #endif /* LDAP_DEBUG */
1403
1404         *type = tag;    /* return request type */
1405         return ber;
1406 }
1407
1408
1409 LDAPRequest *
1410 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1411 {
1412         LDAPRequest     *lr;
1413
1414 #ifdef LDAP_R_COMPILE
1415         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1416 #endif
1417         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1418                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1419                         continue;       /* Skip completed requests */
1420                 }
1421                 if ( msgid == lr->lr_msgid ) {
1422                         break;
1423                 }
1424         }
1425 #ifdef LDAP_R_COMPILE
1426         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1427 #endif
1428
1429         return( lr );
1430 }
1431
1432