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 1998-2007 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 = 1;
  97
  98         Debug( LDAP_DEBUG_TRACE, "ldap_send_initial_request\n", 0, 0, 0 );
  99
 100 #ifdef LDAP_R_COMPILE
 101         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 102 #endif
 103         if ( ber_sockbuf_ctrl( ld->ld_sb, LBER_SB_OPT_GET_FD, NULL ) == -1 ) {
 104                 /* not connected yet */
 105                 rc = ldap_open_defconn( ld );
 106
 107         }
 108 #ifdef LDAP_R_COMPILE
 109         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 110 #endif
 111         if( rc < 0 ) {
 112                 ber_free( ber, 1 );
 113                 return( -1 );
 114         } else if ( rc == 0 ) {
 115                 Debug( LDAP_DEBUG_TRACE,
 116                         "ldap_open_defconn: successful\n",
 117                         0, 0, 0 );
 118         }
 119
 120 #ifdef LDAP_CONNECTIONLESS
 121         if (LDAP_IS_UDP(ld)) {
 122                 if (msgtype == LDAP_REQ_BIND) {
 123                         if (ld->ld_options.ldo_cldapdn)
 124                                 ldap_memfree(ld->ld_options.ldo_cldapdn);
 125                         ld->ld_options.ldo_cldapdn = ldap_strdup(dn);
 126                         return 0;
 127                 }
 128                 if (msgtype != LDAP_REQ_ABANDON && msgtype != LDAP_REQ_SEARCH)
 129                         return LDAP_PARAM_ERROR;
 130         }
 131 #endif
 132 #ifdef LDAP_R_COMPILE
 133         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 134 #endif
 135         rc = ldap_send_server_request( ld, ber, msgid, NULL,
 136                 NULL, NULL, NULL );
 137 #ifdef LDAP_R_COMPILE
 138         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 139 #endif
 140         return(rc);
 141 }
 142
 143
 144 int
 145 ldap_int_flush_request(
 146         LDAP *ld,
 147         LDAPRequest *lr )
 148 {
 149         LDAPConn *lc = lr->lr_conn;
 150
 151         if ( ber_flush( lc->lconn_sb, lr->lr_ber, 0 ) != 0 ) {
 152                 if ( sock_errno() == EAGAIN ) {
 153                         /* need to continue write later */
 154                         lr->lr_status = LDAP_REQST_WRITING;
 155                         ldap_mark_select_write( ld, lc->lconn_sb );
 156                         ld->ld_errno = LDAP_BUSY;
 157                         return -2;
 158                 } else {
 159                         ld->ld_errno = LDAP_SERVER_DOWN;
 160                         ldap_free_request( ld, lr );
 161                         ldap_free_connection( ld, lc, 0, 0 );
 162                         return( -1 );
 163                 }
 164         } else {
 165                 if ( lr->lr_parent == NULL ) {
 166                         lr->lr_ber->ber_end = lr->lr_ber->ber_ptr;
 167                         lr->lr_ber->ber_ptr = lr->lr_ber->ber_buf;
 168                 }
 169                 lr->lr_status = LDAP_REQST_INPROGRESS;
 170
 171                 /* sent -- waiting for a response */
 172                 ldap_mark_select_read( ld, lc->lconn_sb );
 173         }
 174         return 0;
 175 }
 176
 177 int
 178 ldap_send_server_request(
 179         LDAP *ld,
 180         BerElement *ber,
 181         ber_int_t msgid,
 182         LDAPRequest *parentreq,
 183         LDAPURLDesc *srvlist,
 184         LDAPConn *lc,
 185         LDAPreqinfo *bind )
 186 {
 187         LDAPRequest     *lr;
 188         int incparent, rc;
 189
 190         Debug( LDAP_DEBUG_TRACE, "ldap_send_server_request\n", 0, 0, 0 );
 191
 192         incparent = 0;
 193         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 194
 195         if ( lc == NULL ) {
 196                 if ( srvlist == NULL ) {
 197                         lc = ld->ld_defconn;
 198                 } else {
 199                         lc = find_connection( ld, srvlist, 1 );
 200                         if ( lc == NULL ) {
 201                                 if ( (bind != NULL) && (parentreq != NULL) ) {
 202                                         /* Remember the bind in the parent */
 203                                         incparent = 1;
 204                                         ++parentreq->lr_outrefcnt;
 205                                 }
 206                                 lc = ldap_new_connection( ld, srvlist, 0, 1, bind );
 207                         }
 208                 }
 209         }
 210
 211         if ( lc == NULL || lc->lconn_status != LDAP_CONNST_CONNECTED ) {
 212                 ber_free( ber, 1 );
 213                 if ( ld->ld_errno == LDAP_SUCCESS ) {
 214                         ld->ld_errno = LDAP_SERVER_DOWN;
 215                 }
 216                 if ( incparent ) {
 217                         /* Forget about the bind */
 218                         --parentreq->lr_outrefcnt;
 219                 }
 220                 return( -1 );
 221         }
 222
 223         use_connection( ld, lc );
 224
 225         /* If we still have an incomplete write, try to finish it before
 226          * dealing with the new request. If we don't finish here, return
 227          * LDAP_BUSY and let the caller retry later. We only allow a single
 228          * request to be in WRITING state.
 229          */
 230         rc = 0;
 231         if ( ld->ld_requests &&
 232                 ld->ld_requests->lr_status == LDAP_REQST_WRITING &&
 233                 ldap_int_flush_request( ld, ld->ld_requests ) < 0 )
 234         {
 235                 rc = -1;
 236         }
 237         if ( rc ) return rc;
 238
 239         lr = (LDAPRequest *)LDAP_CALLOC( 1, sizeof( LDAPRequest ));
 240         if ( lr == NULL ) {
 241                 ld->ld_errno = LDAP_NO_MEMORY;
 242                 ldap_free_connection( ld, lc, 0, 0 );
 243                 ber_free( ber, 1 );
 244                 if ( incparent ) {
 245                         /* Forget about the bind */
 246                         --parentreq->lr_outrefcnt;
 247                 }
 248                 return( -1 );
 249         }
 250         lr->lr_msgid = msgid;
 251         lr->lr_status = LDAP_REQST_INPROGRESS;
 252         lr->lr_res_errno = LDAP_SUCCESS;        /* optimistic */
 253         lr->lr_ber = ber;
 254         lr->lr_conn = lc;
 255         if ( parentreq != NULL ) {      /* sub-request */
 256                 if ( !incparent ) {
 257                         /* Increment if we didn't do it before the bind */
 258                         ++parentreq->lr_outrefcnt;
 259                 }
 260                 lr->lr_origid = parentreq->lr_origid;
 261                 lr->lr_parentcnt = ++parentreq->lr_parentcnt;
 262                 lr->lr_parent = parentreq;
 263                 lr->lr_refnext = parentreq->lr_child;
 264                 parentreq->lr_child = lr;
 265         } else {                        /* original request */
 266                 lr->lr_origid = lr->lr_msgid;
 267         }
 268
 269         /* Extract requestDN for future reference */
 270         {
 271                 BerElement tmpber = *ber;
 272                 ber_int_t       bint;
 273                 ber_tag_t       tag, rtag;
 274
 275                 ber_reset( &tmpber, 1 );
 276                 rtag = ber_scanf( &tmpber, "{it", /*}*/ &bint, &tag );
 277                 switch ( tag ) {
 278                 case LDAP_REQ_BIND:
 279                         rtag = ber_scanf( &tmpber, "{i" /*}*/, &bint );
 280                         break;
 281                 case LDAP_REQ_DELETE:
 282                         break;
 283                 default:
 284                         rtag = ber_scanf( &tmpber, "{" /*}*/ );
 285                 case LDAP_REQ_ABANDON:
 286                         break;
 287                 }
 288                 if ( tag != LDAP_REQ_ABANDON ) {
 289                         ber_skip_tag( &tmpber, &lr->lr_dn.bv_len );
 290                         lr->lr_dn.bv_val = tmpber.ber_ptr;
 291                 }
 292         }
 293
 294         lr->lr_prev = NULL;
 295         if (( lr->lr_next = ld->ld_requests ) != NULL ) {
 296                 lr->lr_next->lr_prev = lr;
 297         }
 298         ld->ld_requests = lr;
 299
 300         ld->ld_errno = LDAP_SUCCESS;
 301         if ( ldap_int_flush_request( ld, lr ) == -1 ) {
 302                 msgid = -1;
 303         }
 304
 305         return( msgid );
 306 }
 307
 308 LDAPConn *
 309 ldap_new_connection( LDAP *ld, LDAPURLDesc *srvlist, int use_ldsb,
 310         int connect, LDAPreqinfo *bind )
 311 {
 312         LDAPConn        *lc;
 313         LDAPURLDesc     *srv;
 314
 315         Debug( LDAP_DEBUG_TRACE, "ldap_new_connection %d %d %d\n",
 316                 use_ldsb, connect, (bind != NULL) );
 317         /*
 318          * make a new LDAP server connection
 319          * XXX open connection synchronously for now
 320          */
 321         lc = (LDAPConn *)LDAP_CALLOC( 1, sizeof( LDAPConn ) );
 322         if ( lc == NULL ) {
 323                 ld->ld_errno = LDAP_NO_MEMORY;
 324                 return( NULL );
 325         }
 326
 327         if ( use_ldsb ) {
 328                 assert( ld->ld_sb != NULL );
 329                 lc->lconn_sb = ld->ld_sb;
 330
 331         } else {
 332                 lc->lconn_sb = ber_sockbuf_alloc();
 333                 if ( lc->lconn_sb == NULL ) {
 334                         LDAP_FREE( (char *)lc );
 335                         ld->ld_errno = LDAP_NO_MEMORY;
 336                         return( NULL );
 337                 }
 338         }
 339
 340         if ( connect ) {
 341                 for ( srv = srvlist; srv != NULL; srv = srv->lud_next ) {
 342                         if ( ldap_int_open_connection( ld, lc, srv, 0 ) != -1 )
 343                         {
 344                                 break;
 345                         }
 346                 }
 347
 348                 if ( srv == NULL ) {
 349                         if ( !use_ldsb ) {
 350                                 ber_sockbuf_free( lc->lconn_sb );
 351                         }
 352                         LDAP_FREE( (char *)lc );
 353                         ld->ld_errno = LDAP_SERVER_DOWN;
 354                         return( NULL );
 355                 }
 356
 357                 lc->lconn_server = ldap_url_dup( srv );
 358         }
 359
 360         lc->lconn_status = LDAP_CONNST_CONNECTED;
 361 #ifdef LDAP_R_COMPILE
 362         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 363 #endif
 364         lc->lconn_next = ld->ld_conns;
 365         ld->ld_conns = lc;
 366 #ifdef LDAP_R_COMPILE
 367         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 368 #endif
 369
 370         /*
 371          * XXX for now, we always do a synchronous bind.  This will have
 372          * to change in the long run...
 373          */
 374         if ( bind != NULL) {
 375                 int             err = 0;
 376                 LDAPConn        *savedefconn;
 377
 378                 /* Set flag to prevent additional referrals
 379                  * from being processed on this
 380                  * connection until the bind has completed
 381                  */
 382                 lc->lconn_rebind_inprogress = 1;
 383                 /* V3 rebind function */
 384                 if ( ld->ld_rebind_proc != NULL) {
 385                         LDAPURLDesc     *srvfunc;
 386
 387                         srvfunc = ldap_url_dup( srvlist );
 388                         if ( srvfunc == NULL ) {
 389                                 ld->ld_errno = LDAP_NO_MEMORY;
 390                                 err = -1;
 391                         } else {
 392                                 savedefconn = ld->ld_defconn;
 393                                 ++lc->lconn_refcnt;     /* avoid premature free */
 394                                 ld->ld_defconn = lc;
 395
 396                                 Debug( LDAP_DEBUG_TRACE, "Call application rebind_proc\n", 0, 0, 0);
 397 #ifdef LDAP_R_COMPILE
 398                                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 399                                 ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 400 #endif
 401                                 err = (*ld->ld_rebind_proc)( ld,
 402                                         bind->ri_url, bind->ri_request, bind->ri_msgid,
 403                                         ld->ld_rebind_params );
 404 #ifdef LDAP_R_COMPILE
 405                                 ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 406                                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 407 #endif
 408
 409                                 ld->ld_defconn = savedefconn;
 410                                 --lc->lconn_refcnt;
 411
 412                                 if ( err != 0 ) {
 413                                         err = -1;
 414                                         ldap_free_connection( ld, lc, 1, 0 );
 415                                         lc = NULL;
 416                                 }
 417                                 ldap_free_urldesc( srvfunc );
 418                         }
 419                 } else {
 420                         int             msgid, rc;
 421                         struct berval   passwd = BER_BVNULL;
 422
 423                         savedefconn = ld->ld_defconn;
 424                         ++lc->lconn_refcnt;     /* avoid premature free */
 425                         ld->ld_defconn = lc;
 426
 427                         Debug( LDAP_DEBUG_TRACE,
 428                                 "anonymous rebind via ldap_sasl_bind(\"\")\n",
 429                                 0, 0, 0);
 430
 431 #ifdef LDAP_R_COMPILE
 432                         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 433                         ldap_pvt_thread_mutex_unlock( &ld->ld_res_mutex );
 434 #endif
 435                         rc = ldap_sasl_bind( ld, "", LDAP_SASL_SIMPLE, &passwd,
 436                                 NULL, NULL, &msgid );
 437                         if ( rc != LDAP_SUCCESS ) {
 438                                 err = -1;
 439
 440                         } else {
 441                                 for ( err = 1; err > 0; ) {
 442                                         struct timeval  tv = { 0, 100000 };
 443                                         LDAPMessage     *res = NULL;
 444
 445                                         switch ( ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res ) ) {
 446                                         case -1:
 447                                                 err = -1;
 448                                                 break;
 449
 450                                         case 0:
 451 #ifdef LDAP_R_COMPILE
 452                                                 ldap_pvt_thread_yield();
 453 #endif
 454                                                 break;
 455
 456                                         case LDAP_RES_BIND:
 457                                                 rc = ldap_parse_result( ld, res, &err, NULL, NULL, NULL, NULL, 1 );
 458                                                 if ( rc != LDAP_SUCCESS ) {
 459                                                         err = -1;
 460
 461                                                 } else if ( err != LDAP_SUCCESS ) {
 462                                                         err = -1;
 463                                                 }
 464                                                 /* else err == LDAP_SUCCESS == 0 */
 465                                                 break;
 466
 467                                         default:
 468                                                 Debug( LDAP_DEBUG_TRACE,
 469                                                         "ldap_new_connection %p: "
 470                                                         "unexpected response %d "
 471                                                         "from BIND request id=%d\n",
 472                                                         ld, ldap_msgtype( res ), msgid );
 473                                                 err = -1;
 474                                                 break;
 475                                         }
 476                                 }
 477                         }
 478 #ifdef LDAP_R_COMPILE
 479                         ldap_pvt_thread_mutex_lock( &ld->ld_res_mutex );
 480                         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 481 #endif
 482                         ld->ld_defconn = savedefconn;
 483                         --lc->lconn_refcnt;
 484
 485                         if ( err != 0 ) {
 486                                 ldap_free_connection( ld, lc, 1, 0 );
 487                                 lc = NULL;
 488                         }
 489                 }
 490                 if ( lc != NULL )
 491                         lc->lconn_rebind_inprogress = 0;
 492         }
 493
 494         return( lc );
 495 }
 496
 497
 498 static LDAPConn *
 499 find_connection( LDAP *ld, LDAPURLDesc *srv, int any )
 500 /*
 501  * return an existing connection (if any) to the server srv
 502  * if "any" is non-zero, check for any server in the "srv" chain
 503  */
 504 {
 505         LDAPConn        *lc;
 506         LDAPURLDesc     *lcu, *lsu;
 507         int lcu_port, lsu_port;
 508         int found = 0;
 509
 510 #ifdef LDAP_R_COMPILE
 511         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 512 #endif
 513         for ( lc = ld->ld_conns; lc != NULL; lc = lc->lconn_next ) {
 514                 lcu = lc->lconn_server;
 515                 lcu_port = ldap_pvt_url_scheme_port( lcu->lud_scheme,
 516                         lcu->lud_port );
 517
 518                 for ( lsu = srv; lsu != NULL; lsu = lsu->lud_next ) {
 519                         lsu_port = ldap_pvt_url_scheme_port( lsu->lud_scheme,
 520                                 lsu->lud_port );
 521
 522                         if ( lsu_port == lcu_port
 523                                 && strcmp( lcu->lud_scheme, lsu->lud_scheme ) == 0
 524                                 && lcu->lud_host != NULL && *lcu->lud_host != '\0'
 525                             && lsu->lud_host != NULL && *lsu->lud_host != '\0'
 526                                 && strcasecmp( lsu->lud_host, lcu->lud_host ) == 0 )
 527                         {
 528                                 found = 1;
 529                                 break;
 530                         }
 531
 532                         if ( !any ) break;
 533                 }
 534                 if ( found )
 535                         break;
 536         }
 537 #ifdef LDAP_R_COMPILE
 538         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 539 #endif
 540         return lc;
 541 }
 542
 543
 544
 545 static void
 546 use_connection( LDAP *ld, LDAPConn *lc )
 547 {
 548         ++lc->lconn_refcnt;
 549         lc->lconn_lastused = time( NULL );
 550 }
 551
 552
 553 void
 554 ldap_free_connection( LDAP *ld, LDAPConn *lc, int force, int unbind )
 555 {
 556         LDAPConn        *tmplc, *prevlc;
 557
 558         Debug( LDAP_DEBUG_TRACE,
 559                 "ldap_free_connection %d %d\n",
 560                 force, unbind, 0 );
 561
 562         if ( force || --lc->lconn_refcnt <= 0 ) {
 563                 if ( lc->lconn_status == LDAP_CONNST_CONNECTED ) {
 564                         ldap_mark_select_clear( ld, lc->lconn_sb );
 565                         if ( unbind ) {
 566                                 ldap_send_unbind( ld, lc->lconn_sb,
 567                                                 NULL, NULL );
 568                         }
 569                 }
 570
 571                 if ( lc->lconn_ber != NULL ) {
 572                         ber_free( lc->lconn_ber, 1 );
 573                 }
 574
 575                 ldap_int_sasl_close( ld, lc );
 576
 577                 prevlc = NULL;
 578 #ifdef LDAP_R_COMPILE
 579         ldap_pvt_thread_mutex_lock( &ld->ld_conn_mutex );
 580 #endif
 581                 for ( tmplc = ld->ld_conns;
 582                         tmplc != NULL;
 583                         tmplc = tmplc->lconn_next )
 584                 {
 585                         if ( tmplc == lc ) {
 586                                 if ( prevlc == NULL ) {
 587                                     ld->ld_conns = tmplc->lconn_next;
 588                                 } else {
 589                                     prevlc->lconn_next = tmplc->lconn_next;
 590                                 }
 591                                 break;
 592                         }
 593                         prevlc = tmplc;
 594                 }
 595 #ifdef LDAP_R_COMPILE
 596         ldap_pvt_thread_mutex_unlock( &ld->ld_conn_mutex );
 597 #endif
 598                 ldap_free_urllist( lc->lconn_server );
 599 #ifdef LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND
 600                 if ( lc->lconn_krbinstance != NULL ) {
 601                         LDAP_FREE( lc->lconn_krbinstance );
 602                 }
 603 #endif
 604
 605                 /* FIXME: is this at all possible? */
 606                 if ( force ) {
 607                         LDAPRequest     *lr;
 608
 609                         for ( lr = ld->ld_requests; lr; ) {
 610                                 LDAPRequest     *lr_next = lr->lr_next;
 611
 612                                 if ( lr->lr_conn == lc ) {
 613                                         ldap_free_request_int( ld, lr );
 614                                 }
 615
 616                                 lr = lr_next;
 617                         }
 618                 }
 619                 if ( lc->lconn_sb != ld->ld_sb ) {
 620                         ber_sockbuf_free( lc->lconn_sb );
 621                 }
 622                 if ( lc->lconn_rebind_queue != NULL) {
 623                         int i;
 624                         for( i = 0; lc->lconn_rebind_queue[i] != NULL; i++ ) {
 625                                 LDAP_VFREE( lc->lconn_rebind_queue[i] );
 626                         }
 627                         LDAP_FREE( lc->lconn_rebind_queue );
 628                 }
 629                 LDAP_FREE( lc );
 630                 Debug( LDAP_DEBUG_TRACE,
 631                         "ldap_free_connection: actually freed\n",
 632                         0, 0, 0 );
 633         } else {
 634                 lc->lconn_lastused = time( NULL );
 635                 Debug( LDAP_DEBUG_TRACE, "ldap_free_connection: refcnt %d\n",
 636                                 lc->lconn_refcnt, 0, 0 );
 637         }
 638 }
 639
 640
 641 #ifdef LDAP_DEBUG
 642 void
 643 ldap_dump_connection( LDAP *ld, LDAPConn *lconns, int all )
 644 {
 645         LDAPConn        *lc;
 646         char            timebuf[32];
 647
 648         fprintf( stderr, "** ld %p Connection%s:\n", (void *)ld, all ? "s" : "" );
 649         for ( lc = lconns; lc != NULL; lc = lc->lconn_next ) {
 650                 if ( lc->lconn_server != NULL ) {
 651                         fprintf( stderr, "* host: %s  port: %d%s\n",
 652                             ( lc->lconn_server->lud_host == NULL ) ? "(null)"
 653                             : lc->lconn_server->lud_host,
 654                             lc->lconn_server->lud_port, ( lc->lconn_sb ==
 655                             ld->ld_sb ) ? "  (default)" : "" );
 656                 }
 657                 fprintf( stderr, "  refcnt: %d  status: %s\n", lc->lconn_refcnt,
 658                     ( lc->lconn_status == LDAP_CONNST_NEEDSOCKET ) ?
 659                     "NeedSocket" : ( lc->lconn_status ==
 660                     LDAP_CONNST_CONNECTING ) ? "Connecting" : "Connected" );
 661                 fprintf( stderr, "  last used: %s",
 662                     ldap_pvt_ctime( &lc->lconn_lastused, timebuf ));
 663                 if( lc->lconn_rebind_inprogress ) {
 664                         fprintf( stderr, "  rebind in progress\n");
 665                         if( lc->lconn_rebind_queue != NULL) {
 666                                 int i = 0;
 667                                 for( ;lc->lconn_rebind_queue[i] != NULL; i++) {
 668                                         int j = 0;
 669                                         for( ;lc->lconn_rebind_queue[i][j] != 0; j++) {
 670                                                 fprintf( stderr, "    queue %d entry %d - %s\n",
 671                                                         i, j, lc->lconn_rebind_queue[i][j]);
 672                                         }
 673                                 }
 674                         } else {
 675                                 fprintf( stderr, "    queue is empty\n");
 676                         }
 677                 }
 678                 fprintf(stderr, "\n");
 679                 if ( !all ) {
 680                         break;
 681                 }
 682         }
 683 }
 684
 685
 686 void
 687 ldap_dump_requests_and_responses( LDAP *ld )
 688 {
 689         LDAPRequest     *lr;
 690         LDAPMessage     *lm, *l;
 691
 692 #ifdef LDAP_R_COMPILE
 693         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
 694 #endif
 695         fprintf( stderr, "** ld %p Outstanding Requests:\n", (void *)ld );
 696         if (( lr = ld->ld_requests ) == NULL ) {
 697                 fprintf( stderr, "   Empty\n" );
 698         }
 699         for ( ; lr != NULL; lr = lr->lr_next ) {
 700             fprintf( stderr, " * msgid %d,  origid %d, status %s\n",
 701                 lr->lr_msgid, lr->lr_origid,
 702                 ( lr->lr_status == LDAP_REQST_INPROGRESS ) ? "InProgress" :
 703                 ( lr->lr_status == LDAP_REQST_CHASINGREFS ) ? "ChasingRefs" :
 704                 ( lr->lr_status == LDAP_REQST_NOTCONNECTED ) ? "NotConnected" :
 705                 ( lr->lr_status == LDAP_REQST_WRITING) ? "Writing" :
 706                 ( lr->lr_status == LDAP_REQST_COMPLETED ? "RequestCompleted"
 707                         : "InvalidStatus"));
 708             fprintf( stderr, "   outstanding referrals %d, parent count %d\n",
 709                     lr->lr_outrefcnt, lr->lr_parentcnt );
 710         }
 711 #ifdef LDAP_R_COMPILE
 712         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
 713 #endif
 714         fprintf( stderr, "** ld %p Response Queue:\n", (void *)ld );
 715         if (( lm = ld->ld_responses ) == NULL ) {
 716                 fprintf( stderr, "   Empty\n" );
 717         }
 718         for ( ; lm != NULL; lm = lm->lm_next ) {
 719                 fprintf( stderr, " * msgid %d,  type %lu\n",
 720                     lm->lm_msgid, (unsigned long) lm->lm_msgtype );
 721                 if (( l = lm->lm_chain ) != NULL ) {
 722                         fprintf( stderr, "   chained responses:\n" );
 723                         for ( ; l != NULL; l = l->lm_chain ) {
 724                                 fprintf( stderr,
 725                                     "  * msgid %d,  type %lu\n",
 726                                     l->lm_msgid,
 727                                     (unsigned long) l->lm_msgtype );
 728                         }
 729                 }
 730         }
 731 }
 732 #endif /* LDAP_DEBUG */
 733
 734 static void
 735 ldap_free_request_int( LDAP *ld, LDAPRequest *lr )
 736 {
 737         if ( lr->lr_prev == NULL ) {
 738                 /* free'ing the first request? */
 739                 assert( ld->ld_requests == lr );
 740                 ld->ld_requests = lr->lr_next;
 741
 742         } else {
 743                 lr->lr_prev->lr_next = lr->lr_next;
 744         }
 745
 746         if ( lr->lr_next != NULL ) {
 747                 lr->lr_next->lr_prev = lr->lr_prev;
 748         }
 749
 750         if ( lr->lr_ber != NULL ) {
 751                 ber_free( lr->lr_ber, 1 );
 752         }
 753
 754         if ( lr->lr_res_error != NULL ) {
 755                 LDAP_FREE( lr->lr_res_error );
 756         }
 757
 758         if ( lr->lr_res_matched != NULL ) {
 759                 LDAP_FREE( lr->lr_res_matched );
 760         }
 761
 762         LDAP_FREE( lr );
 763 }
 764
 765 void
 766 ldap_free_request( LDAP *ld, LDAPRequest *lr )
 767 {
 768         LDAPRequest     **ttmplr;
 769
 770         Debug( LDAP_DEBUG_TRACE, "ldap_free_request (origid %d, msgid %d)\n",
 771                 lr->lr_origid, lr->lr_msgid, 0 );
 772
 773         /* free all referrals (child requests) */
 774         while ( lr->lr_child )
 775                 ldap_free_request( ld, lr->lr_child );
 776
 777         if ( lr->lr_parent != NULL ) {
 778                 --lr->lr_parent->lr_outrefcnt;
 779                 for ( ttmplr = &lr->lr_parent->lr_child; *ttmplr && *ttmplr != lr; ttmplr = &(*ttmplr)->lr_refnext );
 780                 if ( *ttmplr == lr )
 781                         *ttmplr = lr->lr_refnext;
 782         }
 783         ldap_free_request_int( ld, lr );
 784 }
 785
 786 /*
 787  * call first time with *cntp = -1
 788  * when returns *cntp == -1, no referrals are left
 789  *
 790  * NOTE: may replace *refsp, or shuffle the contents
 791  * of the original array.
 792  */
 793 static int ldap_int_nextref(
 794         LDAP                    *ld,
 795         char                    ***refsp,
 796         int                     *cntp,
 797         void                    *params )
 798 {
 799         assert( refsp != NULL );
 800         assert( *refsp != NULL );
 801         assert( cntp != NULL );
 802
 803         if ( *cntp < -1 ) {
 804                 *cntp = -1;
 805                 return -1;
 806         }
 807
 808         (*cntp)++;
 809
 810         if ( (*refsp)[ *cntp ] == NULL ) {
 811                 *cntp = -1;
 812         }
 813
 814         return 0;
 815 }
 816
 817 /*
 818  * Chase v3 referrals
 819  *
 820  * Parameters:
 821  *  (IN) ld = LDAP connection handle
 822  *  (IN) lr = LDAP Request structure
 823  *  (IN) refs = array of pointers to referral strings that we will chase
 824  *              The array will be free'd by this function when no longer needed
 825  *  (IN) sref != 0 if following search reference
 826  *  (OUT) errstrp = Place to return a string of referrals which could not be followed
 827  *  (OUT) hadrefp = 1 if sucessfully followed referral
 828  *
 829  * Return value - number of referrals followed
 830  */
 831 int
 832 ldap_chase_v3referrals( LDAP *ld, LDAPRequest *lr, char **refs, int sref, char **errstrp, int *hadrefp )
 833 {
 834         char            *unfollowed;
 835         int              unfollowedcnt = 0;
 836         LDAPRequest     *origreq;
 837         LDAPURLDesc     *srv = NULL;
 838         BerElement      *ber;
 839         char            **refarray = NULL;
 840         LDAPConn        *lc;
 841         int                      rc, count, i, j, id;
 842         LDAPreqinfo  rinfo;
 843
 844         ld->ld_errno = LDAP_SUCCESS;    /* optimistic */
 845         *hadrefp = 0;
 846
 847         Debug( LDAP_DEBUG_TRACE, "ldap_chase_v3referrals\n", 0, 0, 0 );
 848
 849         unfollowed = NULL;
 850         rc = count = 0;
 851
 852         /* If no referrals in array, return */
 853         if ( (refs == NULL) || ( (refs)[0] == NULL) ) {
 854                 rc = 0;
 855                 goto done;
 856         }
 857
 858         /* Check for hop limit exceeded */
 859         if ( lr->lr_parentcnt >= ld->ld_refhoplimit ) {
 860                 Debug( LDAP_DEBUG_ANY,
 861                     "more than %d referral hops (dropping)\n", ld->ld_refhoplimit, 0, 0 );
 862                 ld->ld_errno = LDAP_REFERRAL_LIMIT_EXCEEDED;
 863             rc = -1;
 864                 goto done;
 865         }
 866
 867         /* find original request */
 868         for ( origreq = lr;
 869                 origreq->lr_parent != NULL;
 870                 origreq = origreq->lr_parent )
 871         {
 872                 /* empty */ ;
 873         }
 874
 875         refarray = refs;
 876         refs = NULL;
 877
 878         if ( ld->ld_nextref_proc == NULL ) {
 879                 ld->ld_nextref_proc = ldap_int_nextref;
 880         }
 881
 882         /* parse out & follow referrals */
 883         i = -1;
 884         for ( ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params );
 885                         i != -1;
 886                         ld->ld_nextref_proc( ld, &refarray, &i, ld->ld_nextref_params ) )
 887         {
 888
 889                 /* Parse the referral URL */
 890                 if (( rc = ldap_url_parse_ext( refarray[i], &srv)) != LDAP_SUCCESS) {
 891                         ld->ld_errno = rc;
 892                         rc = -1;
 893                         goto done;
 894                 }
 895
 896                 if( srv->lud_crit_exts ) {
 897                         /* we do not support any extensions */
 898                         ld->ld_errno = LDAP_NOT_SUPPORTED;
 899                         rc = -1;
 900                         goto done;
 901                 }
 902
 903                 /* treat ldap://hostpart and ldap://hostpart/ the same */
 904                 if ( srv->lud_dn && srv->lud_dn[0] == '\0' ) {
 905                         LDAP_FREE( srv->lud_dn );
 906                         srv->lud_dn = NULL;
 907                 }
 908
 909                 /* check connection for re-bind in progress */
 910                 if (( lc = find_connection( ld, srv, 1 )) != NULL ) {
 911                         /* See if we've already requested this DN with this conn */
 912                         LDAPRequest *lp;
 913                         int looped = 0;
 914                         int len = srv->lud_dn ? strlen( srv->lud_dn ) : 0;
 915                         for ( lp = origreq; lp; ) {
 916                                 if ( lp->lr_conn == lc ) {
 917                                         if ( len == lp->lr_dn.bv_len
 918                                                 && len
 919                                                 && strncmp( srv->lud_dn, lp->lr_dn.bv_val, len ) == 0 )
 920                                         {
 921                                                 looped = 1;
 922                                                 break;
 923                                         }
 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
1157                 if ( rc != LDAP_URL_SUCCESS ) {
1158                         Debug( LDAP_DEBUG_TRACE,
1159                             "ignoring unknown referral <%s>\n", ref, 0, 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                                         if ( len == lp->lr_dn.bv_len ) {
1183                                                 if ( len && strncmp( srv->lud_dn, lp->lr_dn.bv_val,
1184                                                         len ))
1185                                                         continue;
1186                                                 looped = 1;
1187                                                 break;
1188                                         }
1189                                 }
1190                         }
1191                         if ( looped ) {
1192                                 ldap_free_urllist(srv);
1193                                 ld->ld_errno = LDAP_CLIENT_LOOP;
1194                                 rc = -1;
1195                                 continue;
1196                         }
1197                 }
1198
1199                 LDAP_NEXT_MSGID( ld, id );
1200                 ber = re_encode_request( ld, origreq->lr_ber,
1201                     id, sref, srv, &rinfo.ri_request );
1202
1203                 if ( ber == NULL ) {
1204                         return -1 ;
1205                 }
1206
1207                 /* copy the complete referral for rebind process */
1208                 rinfo.ri_url = LDAP_STRDUP( ref );
1209
1210                 rinfo.ri_msgid = origreq->lr_origid;
1211
1212 #ifdef LDAP_R_COMPILE
1213                 ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1214 #endif
1215                 rc = ldap_send_server_request( ld, ber, id,
1216                         lr, srv, NULL, &rinfo );
1217 #ifdef LDAP_R_COMPILE
1218                 ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1219 #endif
1220
1221                 LDAP_FREE( rinfo.ri_url );
1222
1223                 if( rc >= 0 ) {
1224                         ++count;
1225                 } else {
1226                         Debug( LDAP_DEBUG_ANY,
1227                                 "Unable to chase referral \"%s\" (%d: %s)\n",
1228                                 ref, ld->ld_errno, ldap_err2string( ld->ld_errno ) );
1229                         rc = ldap_append_referral( ld, &unfollowed, ref );
1230                 }
1231
1232                 ldap_free_urllist(srv);
1233         }
1234
1235         LDAP_FREE( *errstrp );
1236         *errstrp = unfollowed;
1237
1238         return(( rc == 0 ) ? count : rc );
1239 }
1240
1241
1242 int
1243 ldap_append_referral( LDAP *ld, char **referralsp, char *s )
1244 {
1245         int     first;
1246
1247         if ( *referralsp == NULL ) {
1248                 first = 1;
1249                 *referralsp = (char *)LDAP_MALLOC( strlen( s ) + LDAP_REF_STR_LEN
1250                     + 1 );
1251         } else {
1252                 first = 0;
1253                 *referralsp = (char *)LDAP_REALLOC( *referralsp,
1254                     strlen( *referralsp ) + strlen( s ) + 2 );
1255         }
1256
1257         if ( *referralsp == NULL ) {
1258                 ld->ld_errno = LDAP_NO_MEMORY;
1259                 return( -1 );
1260         }
1261
1262         if ( first ) {
1263                 strcpy( *referralsp, LDAP_REF_STR );
1264         } else {
1265                 strcat( *referralsp, "\n" );
1266         }
1267         strcat( *referralsp, s );
1268
1269         return( 0 );
1270 }
1271
1272
1273
1274 static BerElement *
1275 re_encode_request( LDAP *ld,
1276         BerElement *origber,
1277         ber_int_t msgid,
1278         int sref,
1279         LDAPURLDesc *srv,
1280         int *type )
1281 {
1282         /*
1283          * XXX this routine knows way too much about how the lber library works!
1284          */
1285         ber_int_t       along;
1286         ber_tag_t       tag;
1287         ber_tag_t       rtag;
1288         ber_int_t       ver;
1289         ber_int_t       scope;
1290         int             rc;
1291         BerElement      tmpber, *ber;
1292         struct berval           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, &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", &dn );
1322
1323         } else if ( tag == LDAP_REQ_SEARCH ) {
1324                 /* search requests need to be re-scope-ed */
1325                 rtag = ber_scanf( &tmpber, "{me" /*"}"*/, &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 #ifdef LDAP_SCOPE_SUBORDINATE
1346                         case LDAP_SCOPE_SUBORDINATE:
1347 #endif
1348                                 scope = LDAP_SCOPE_SUBTREE;
1349                                 break;
1350                         }
1351                 }
1352
1353         } else {
1354                 rtag = ber_scanf( &tmpber, "{m" /*}*/, &dn );
1355         }
1356
1357         if( rtag == LBER_ERROR ) {
1358                 ld->ld_errno = LDAP_DECODING_ERROR;
1359                 return NULL;
1360         }
1361
1362         /* restore character zero'd out by ber_scanf*/
1363         dn.bv_val[dn.bv_len] = tmpber.ber_tag;
1364
1365         if (( ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
1366                 return NULL;
1367         }
1368
1369         if ( srv->lud_dn ) {
1370                 ber_str2bv( srv->lud_dn, 0, 0, &dn );
1371         }
1372
1373         if ( tag == LDAP_REQ_BIND ) {
1374                 rc = ber_printf( ber, "{it{iO" /*}}*/, msgid, tag, ver, &dn );
1375         } else if ( tag == LDAP_REQ_DELETE ) {
1376                 rc = ber_printf( ber, "{itON}", msgid, tag, &dn );
1377         } else if ( tag == LDAP_REQ_SEARCH ) {
1378                 rc = ber_printf( ber, "{it{Oe" /*}}*/, msgid, tag, &dn, scope );
1379         } else {
1380                 rc = ber_printf( ber, "{it{O" /*}}*/, msgid, tag, &dn );
1381         }
1382
1383         if ( rc == -1 ) {
1384                 ld->ld_errno = LDAP_ENCODING_ERROR;
1385                 ber_free( ber, 1 );
1386                 return NULL;
1387         }
1388
1389         if ( tag != LDAP_REQ_DELETE && (
1390                 ber_write(ber, tmpber.ber_ptr, ( tmpber.ber_end - tmpber.ber_ptr ), 0)
1391                 != ( tmpber.ber_end - tmpber.ber_ptr ) ||
1392             ber_printf( ber, /*{{*/ "N}N}" ) == -1 ) )
1393         {
1394                 ld->ld_errno = LDAP_ENCODING_ERROR;
1395                 ber_free( ber, 1 );
1396                 return NULL;
1397         }
1398
1399 #ifdef LDAP_DEBUG
1400         if ( ldap_debug & LDAP_DEBUG_PACKETS ) {
1401                 Debug( LDAP_DEBUG_ANY, "re_encode_request new request is:\n",
1402                     0, 0, 0 );
1403                 ber_log_dump( LDAP_DEBUG_BER, ldap_debug, ber, 0 );
1404         }
1405 #endif /* LDAP_DEBUG */
1406
1407         *type = tag;    /* return request type */
1408         return ber;
1409 }
1410
1411
1412 LDAPRequest *
1413 ldap_find_request_by_msgid( LDAP *ld, ber_int_t msgid )
1414 {
1415         LDAPRequest     *lr;
1416
1417 #ifdef LDAP_R_COMPILE
1418         ldap_pvt_thread_mutex_lock( &ld->ld_req_mutex );
1419 #endif
1420         for ( lr = ld->ld_requests; lr != NULL; lr = lr->lr_next ) {
1421                 if( lr->lr_status == LDAP_REQST_COMPLETED ) {
1422                         continue;       /* Skip completed requests */
1423                 }
1424                 if ( msgid == lr->lr_msgid ) {
1425                         break;
1426                 }
1427         }
1428 #ifdef LDAP_R_COMPILE
1429         ldap_pvt_thread_mutex_unlock( &ld->ld_req_mutex );
1430 #endif
1431
1432         return( lr );
1433 }
1434
1435