git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/bind.c

   1 /* bind.c - ldap backend bind function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2012 The OpenLDAP Foundation.
   6  * Portions Copyright 2000-2003 Pierangelo Masarati.
   7  * Portions Copyright 1999-2003 Howard Chu.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/errno.h>
  29 #include <ac/socket.h>
  30 #include <ac/string.h>
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "back-ldap.h"
  35 #include "lutil.h"
  36 #include "lutil_ldap.h"
  37
  38 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ       "2.16.840.1.113730.3.4.12"
  39
  40 #ifdef LDAP_DEVEL
  41 #define SLAP_AUTH_DN 1
  42 #endif
  43
  44 #if LDAP_BACK_PRINT_CONNTREE > 0
  45
  46 static const struct {
  47         slap_mask_t     f;
  48         char            c;
  49 } flagsmap[] = {
  50         { LDAP_BACK_FCONN_ISBOUND,      'B' },
  51         { LDAP_BACK_FCONN_ISANON,       'A' },
  52         { LDAP_BACK_FCONN_ISPRIV,       'P' },
  53         { LDAP_BACK_FCONN_ISTLS,        'T' },
  54         { LDAP_BACK_FCONN_BINDING,      'X' },
  55         { LDAP_BACK_FCONN_TAINTED,      'E' },
  56         { LDAP_BACK_FCONN_ABANDON,      'N' },
  57         { LDAP_BACK_FCONN_ISIDASR,      'S' },
  58         { LDAP_BACK_FCONN_CACHED,       'C' },
  59         { 0,                            '\0' }
  60 };
  61
  62 static void
  63 ldap_back_conn_print( ldapconn_t *lc, const char *avlstr )
  64 {
  65         char buf[ SLAP_TEXT_BUFLEN ];
  66         char fbuf[ sizeof("BAPTIENSC") ];
  67         int i;
  68
  69         ldap_back_conn2str( &lc->lc_base, buf, sizeof( buf ) );
  70         for ( i = 0; flagsmap[ i ].c != '\0'; i++ ) {
  71                 if ( lc->lc_lcflags & flagsmap[i].f ) {
  72                         fbuf[i] = flagsmap[i].c;
  73
  74                 } else {
  75                         fbuf[i] = '.';
  76                 }
  77         }
  78         fbuf[i] = '\0';
  79
  80         fprintf( stderr, "lc=%p %s %s flags=0x%08x (%s)\n",
  81                 (void *)lc, buf, avlstr, lc->lc_lcflags, fbuf );
  82 }
  83
  84 static void
  85 ldap_back_ravl_print( Avlnode *root, int depth )
  86 {
  87         int             i;
  88         ldapconn_t      *lc;
  89
  90         if ( root == 0 ) {
  91                 return;
  92         }
  93
  94         ldap_back_ravl_print( root->avl_right, depth+1 );
  95
  96         for ( i = 0; i < depth; i++ ) {
  97                 fprintf( stderr, "-" );
  98         }
  99
 100         lc = root->avl_data;
 101         ldap_back_conn_print( lc, avl_bf2str( root->avl_bf ) );
 102
 103         ldap_back_ravl_print( root->avl_left, depth + 1 );
 104 }
 105
 106 static char* priv2str[] = {
 107         "privileged",
 108         "privileged/TLS",
 109         "anonymous",
 110         "anonymous/TLS",
 111         "bind",
 112         "bind/TLS",
 113         NULL
 114 };
 115
 116 void
 117 ldap_back_print_conntree( ldapinfo_t *li, char *msg )
 118 {
 119         int     c;
 120
 121         fprintf( stderr, "========> %s\n", msg );
 122
 123         for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
 124                 int             i = 0;
 125                 ldapconn_t      *lc;
 126
 127                 fprintf( stderr, "  %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num );
 128
 129                 LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q )
 130                 {
 131                         fprintf( stderr, "    [%d] ", i );
 132                         ldap_back_conn_print( lc, "" );
 133                         i++;
 134                 }
 135         }
 136
 137         if ( li->li_conninfo.lai_tree == 0 ) {
 138                 fprintf( stderr, "\t(empty)\n" );
 139
 140         } else {
 141                 ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 );
 142         }
 143
 144         fprintf( stderr, "<======== %s\n", msg );
 145 }
 146 #endif /* LDAP_BACK_PRINT_CONNTREE */
 147
 148 static int
 149 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock );
 150
 151 static ldapconn_t *
 152 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 153         struct berval *binddn, struct berval *bindcred );
 154
 155 static int
 156 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 157         struct berval *binddn, struct berval *bindcred );
 158
 159 static int
 160 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs,
 161         ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred );
 162
 163 static int
 164 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs,
 165         ldap_back_send_t sendok );
 166
 167 static int
 168 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
 169
 170 ldapconn_t *
 171 ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc )
 172 {
 173         if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 174                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 175                         assert( lc->lc_q.tqe_prev != NULL );
 176                         assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 );
 177                         li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--;
 178                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 179                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 180                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 181
 182                 } else {
 183                         assert( LDAP_BACK_CONN_TAINTED( lc ) );
 184                         assert( lc->lc_q.tqe_prev == NULL );
 185                 }
 186
 187         } else {
 188                 ldapconn_t      *tmplc = NULL;
 189
 190                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 191                         assert( !LDAP_BACK_CONN_TAINTED( lc ) );
 192                         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 193                                 ldap_back_conndnlc_cmp );
 194                         assert( tmplc == lc );
 195                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 196                 }
 197
 198                 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 199         }
 200
 201         return lc;
 202 }
 203
 204 int
 205 ldap_back_bind( Operation *op, SlapReply *rs )
 206 {
 207         ldapinfo_t              *li = (ldapinfo_t *) op->o_bd->be_private;
 208         ldapconn_t              *lc;
 209
 210         LDAPControl             **ctrls = NULL;
 211         struct berval           save_o_dn;
 212         int                     save_o_do_not_cache,
 213                                 rc = 0;
 214         ber_int_t               msgid;
 215         ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
 216
 217         /* allow rootdn as a means to auth without the need to actually
 218          * contact the proxied DSA */
 219         switch ( be_rootdn_bind( op, rs ) ) {
 220         case SLAP_CB_CONTINUE:
 221                 break;
 222
 223         default:
 224                 return rs->sr_err;
 225         }
 226
 227         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL );
 228         if ( !lc ) {
 229                 return rs->sr_err;
 230         }
 231
 232         /* we can do (almost) whatever we want with this conn,
 233          * because either it's temporary, or it's marked as binding */
 234         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 235                 ch_free( lc->lc_bound_ndn.bv_val );
 236                 BER_BVZERO( &lc->lc_bound_ndn );
 237         }
 238         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 239                 memset( lc->lc_cred.bv_val, 0, lc->lc_cred.bv_len );
 240                 ch_free( lc->lc_cred.bv_val );
 241                 BER_BVZERO( &lc->lc_cred );
 242         }
 243         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 244
 245         /* don't add proxyAuthz; set the bindDN */
 246         save_o_dn = op->o_dn;
 247         save_o_do_not_cache = op->o_do_not_cache;
 248         op->o_dn = op->o_req_dn;
 249         op->o_do_not_cache = 1;
 250
 251         ctrls = op->o_ctrls;
 252         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 253         op->o_dn = save_o_dn;
 254         op->o_do_not_cache = save_o_do_not_cache;
 255         if ( rc != LDAP_SUCCESS ) {
 256                 send_ldap_result( op, rs );
 257                 ldap_back_release_conn( li, lc );
 258                 return( rc );
 259         }
 260
 261 retry:;
 262         /* method is always LDAP_AUTH_SIMPLE if we got here */
 263         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 264                         LDAP_SASL_SIMPLE,
 265                         &op->orb_cred, ctrls, NULL, &msgid );
 266         /* FIXME: should we always retry, or only when piping the bind
 267          * in the "override" connection pool? */
 268         rc = ldap_back_op_result( lc, op, rs, msgid,
 269                 li->li_timeout[ SLAP_OP_BIND ],
 270                 LDAP_BACK_BIND_SERR | retrying );
 271         if ( rc == LDAP_UNAVAILABLE && retrying ) {
 272                 retrying &= ~LDAP_BACK_RETRYING;
 273                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) {
 274                         goto retry;
 275                 }
 276         }
 277
 278         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
 279         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
 280         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
 281
 282         ldap_back_controls_free( op, rs, &ctrls );
 283
 284         if ( rc == LDAP_SUCCESS ) {
 285                 op->o_conn->c_authz_cookie = op->o_bd->be_private;
 286
 287                 /* If defined, proxyAuthz will be used also when
 288                  * back-ldap is the authorizing backend; for this
 289                  * purpose, after a successful bind the connection
 290                  * is left for further binds, and further operations
 291                  * on this client connection will use a default
 292                  * connection with identity assertion */
 293                 /* NOTE: use with care */
 294                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 295                         ldap_back_release_conn( li, lc );
 296                         return( rc );
 297                 }
 298
 299                 /* rebind is now done inside ldap_back_proxy_authz_bind()
 300                  * in case of success */
 301                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 302                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 303
 304                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 305                         memset( lc->lc_cred.bv_val, 0,
 306                                         lc->lc_cred.bv_len );
 307                 }
 308
 309                 if ( LDAP_BACK_SAVECRED( li ) ) {
 310                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 311                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 312
 313                 } else {
 314                         lc->lc_cred.bv_len = 0;
 315                 }
 316         }
 317
 318         /* must re-insert if local DN changed as result of bind */
 319         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 320                 || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn )
 321                         && !LDAP_BACK_PCONN_ISPRIV( lc ) ) )
 322         {
 323                 int             lerr = -1;
 324                 ldapconn_t      *tmplc;
 325
 326                 /* wait for all other ops to release the connection */
 327 retry_lock:;
 328                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 329                 if ( lc->lc_refcnt > 1 ) {
 330                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 331                         ldap_pvt_thread_yield();
 332                         goto retry_lock;
 333                 }
 334
 335 #if LDAP_BACK_PRINT_CONNTREE > 0
 336                 ldap_back_print_conntree( li, ">>> ldap_back_bind" );
 337 #endif /* LDAP_BACK_PRINT_CONNTREE */
 338
 339                 assert( lc->lc_refcnt == 1 );
 340                 ldap_back_conn_delete( li, lc );
 341
 342                 /* delete all cached connections with the current connection */
 343                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 344                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 345                         {
 346                                 assert( !LDAP_BACK_PCONN_ISPRIV( lc ) );
 347                                 Debug( LDAP_DEBUG_TRACE,
 348                                         "=>ldap_back_bind: destroying conn %lu (refcnt=%u)\n",
 349                                         lc->lc_conn->c_connid, lc->lc_refcnt, 0 );
 350
 351                                 if ( tmplc->lc_refcnt != 0 ) {
 352                                         /* taint it */
 353                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 354                                         LDAP_BACK_CONN_CACHED_CLEAR( tmplc );
 355
 356                                 } else {
 357                                         /*
 358                                          * Needs a test because the handler may be corrupted,
 359                                          * and calling ldap_unbind on a corrupted header results
 360                                          * in a segmentation fault
 361                                          */
 362                                         ldap_back_conn_free( tmplc );
 363                                 }
 364                         }
 365                 }
 366
 367                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 368                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 369                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 370                                 LDAP_BACK_PCONN_ROOTDN_SET( lc, op );
 371                         }
 372                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 373                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 374                 }
 375
 376 #if LDAP_BACK_PRINT_CONNTREE > 0
 377                 ldap_back_print_conntree( li, "<<< ldap_back_bind" );
 378 #endif /* LDAP_BACK_PRINT_CONNTREE */
 379
 380                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 381                 switch ( lerr ) {
 382                 case 0:
 383                         LDAP_BACK_CONN_CACHED_SET( lc );
 384                         break;
 385
 386                 case -1:
 387                         /* duplicate; someone else successfully bound
 388                          * on the same connection with the same identity;
 389                          * we can do this because lc_refcnt == 1 */
 390                         ldap_back_conn_free( lc );
 391                         lc = NULL;
 392                 }
 393         }
 394
 395         if ( lc != NULL ) {
 396                 ldap_back_release_conn( li, lc );
 397         }
 398
 399         return( rc );
 400 }
 401
 402 /*
 403  * ldap_back_conndn_cmp
 404  *
 405  * compares two ldapconn_t based on the value of the conn pointer
 406  * and of the local DN; used by avl stuff for insert, lookup
 407  * and direct delete
 408  */
 409 int
 410 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 411 {
 412         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 413         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 414         int rc;
 415
 416         /* If local DNs don't match, it is definitely not a match */
 417         /* For shared sessions, conn is NULL. Only explicitly
 418          * bound sessions will have non-NULL conn.
 419          */
 420         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 421         if ( rc == 0 ) {
 422                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 423         }
 424
 425         return rc;
 426 }
 427
 428 /*
 429  * ldap_back_conndnlc_cmp
 430  *
 431  * compares two ldapconn_t based on the value of the conn pointer,
 432  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 433  * and direct delete
 434  */
 435 static int
 436 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 437 {
 438         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 439         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 440         int rc;
 441
 442         /* If local DNs don't match, it is definitely not a match */
 443         /* For shared sessions, conn is NULL. Only explicitly
 444          * bound sessions will have non-NULL conn.
 445          */
 446         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 447         if ( rc == 0 ) {
 448                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 449                 if ( rc == 0 ) {
 450                         rc = SLAP_PTRCMP( lc1, lc2 );
 451                 }
 452         }
 453
 454         return rc;
 455 }
 456
 457 /*
 458  * ldap_back_conn_cmp
 459  *
 460  * compares two ldapconn_t based on the value of the conn pointer;
 461  * used by avl stuff for delete of all conns with the same connid
 462  */
 463 int
 464 ldap_back_conn_cmp( const void *c1, const void *c2 )
 465 {
 466         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 467         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 468
 469         /* For shared sessions, conn is NULL. Only explicitly
 470          * bound sessions will have non-NULL conn.
 471          */
 472         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 473 }
 474
 475 /*
 476  * ldap_back_conndn_dup
 477  *
 478  * returns -1 in case a duplicate ldapconn_t has been inserted;
 479  * used by avl stuff
 480  */
 481 int
 482 ldap_back_conndn_dup( void *c1, void *c2 )
 483 {
 484         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 485         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 486
 487         /* Cannot have more than one shared session with same DN */
 488         if ( lc1->lc_conn == lc2->lc_conn &&
 489                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 490         {
 491                 return -1;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static int
 498 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock )
 499 {
 500         if ( dolock ) {
 501                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 502         }
 503
 504 #if LDAP_BACK_PRINT_CONNTREE > 0
 505         ldap_back_print_conntree( li, ">>> ldap_back_freeconn" );
 506 #endif /* LDAP_BACK_PRINT_CONNTREE */
 507
 508         (void)ldap_back_conn_delete( li, lc );
 509
 510         if ( lc->lc_refcnt == 0 ) {
 511                 ldap_back_conn_free( (void *)lc );
 512         }
 513
 514 #if LDAP_BACK_PRINT_CONNTREE > 0
 515         ldap_back_print_conntree( li, "<<< ldap_back_freeconn" );
 516 #endif /* LDAP_BACK_PRINT_CONNTREE */
 517
 518         if ( dolock ) {
 519                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 520         }
 521
 522         return 0;
 523 }
 524
 525 #ifdef HAVE_TLS
 526 static int
 527 ldap_back_start_tls(
 528         LDAP            *ld,
 529         int             protocol,
 530         int             *is_tls,
 531         const char      *url,
 532         unsigned        flags,
 533         int             retries,
 534         const char      **text )
 535 {
 536         int             rc = LDAP_SUCCESS;
 537
 538         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 539         if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) )
 540                                 && !ldap_is_ldaps_url( url ) )
 541         {
 542 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 543                 /*
 544                  * use asynchronous StartTLS
 545                  * in case, chase referral (not implemented yet)
 546                  */
 547                 int             msgid;
 548
 549                 if ( protocol == 0 ) {
 550                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 551                                         (void *)&protocol );
 552                 }
 553
 554                 if ( protocol < LDAP_VERSION3 ) {
 555                         /* we should rather bail out... */
 556                         rc = LDAP_UNWILLING_TO_PERFORM;
 557                         *text = "invalid protocol version";
 558                 }
 559
 560                 if ( rc == LDAP_SUCCESS ) {
 561                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 562                 }
 563
 564                 if ( rc == LDAP_SUCCESS ) {
 565                         LDAPMessage     *res = NULL;
 566                         struct timeval  tv;
 567
 568                         LDAP_BACK_TV_SET( &tv );
 569
 570 retry:;
 571                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 572                         if ( rc < 0 ) {
 573                                 rc = LDAP_UNAVAILABLE;
 574
 575                         } else if ( rc == 0 ) {
 576                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 577                                         ldap_pvt_thread_yield();
 578                                         if ( retries > 0 ) {
 579                                                 retries--;
 580                                         }
 581                                         LDAP_BACK_TV_SET( &tv );
 582                                         goto retry;
 583                                 }
 584                                 rc = LDAP_UNAVAILABLE;
 585
 586                         } else if ( rc == LDAP_RES_EXTENDED ) {
 587                                 struct berval   *data = NULL;
 588
 589                                 rc = ldap_parse_extended_result( ld, res,
 590                                                 NULL, &data, 0 );
 591                                 if ( rc == LDAP_SUCCESS ) {
 592                                         SlapReply rs;
 593                                         rc = ldap_parse_result( ld, res, &rs.sr_err,
 594                                                 NULL, NULL, NULL, NULL, 1 );
 595                                         if ( rc != LDAP_SUCCESS ) {
 596                                                 rs.sr_err = rc;
 597                                         }
 598                                         rc = slap_map_api2result( &rs );
 599                                         res = NULL;
 600
 601                                         /* FIXME: in case a referral
 602                                          * is returned, should we try
 603                                          * using it instead of the
 604                                          * configured URI? */
 605                                         if ( rc == LDAP_SUCCESS ) {
 606                                                 rc = ldap_install_tls( ld );
 607
 608                                         } else if ( rc == LDAP_REFERRAL ) {
 609                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 610                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 611                                         }
 612
 613                                         if ( data ) {
 614                                                 if ( data->bv_val ) {
 615                                                         ber_memfree( data->bv_val );
 616                                                 }
 617                                                 ber_memfree( data );
 618                                         }
 619                                 }
 620
 621                         } else {
 622                                 rc = LDAP_OTHER;
 623                         }
 624
 625                         if ( res != NULL ) {
 626                                 ldap_msgfree( res );
 627                         }
 628                 }
 629 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 630                 /*
 631                  * use synchronous StartTLS
 632                  */
 633                 rc = ldap_start_tls_s( ld, NULL, NULL );
 634 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 635
 636                 /* if StartTLS is requested, only attempt it if the URL
 637                  * is not "ldaps://"; this may occur not only in case
 638                  * of misconfiguration, but also when used in the chain
 639                  * overlay, where the "uri" can be parsed out of a referral */
 640                 switch ( rc ) {
 641                 case LDAP_SUCCESS:
 642                         *is_tls = 1;
 643                         break;
 644
 645                 case LDAP_SERVER_DOWN:
 646                         break;
 647
 648                 default:
 649                         if ( LDAP_BACK_TLS_CRITICAL_F( flags ) ) {
 650                                 *text = "could not start TLS";
 651                                 break;
 652                         }
 653
 654                         /* in case Start TLS is not critical */
 655                         *is_tls = 0;
 656                         rc = LDAP_SUCCESS;
 657                         break;
 658                 }
 659
 660         } else {
 661                 *is_tls = 0;
 662         }
 663
 664         return rc;
 665 }
 666 #endif /* HAVE_TLS */
 667
 668 static int
 669 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 670 {
 671         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 672         int             version;
 673         LDAP            *ld = NULL;
 674 #ifdef HAVE_TLS
 675         int             is_tls = op->o_conn->c_is_tls;
 676         int             flags = li->li_flags;
 677         time_t          lctime = (time_t)(-1);
 678         slap_bindconf *sb;
 679 #endif /* HAVE_TLS */
 680
 681         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 682         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 683         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 684         if ( rs->sr_err != LDAP_SUCCESS ) {
 685                 goto error_return;
 686         }
 687
 688         if ( li->li_urllist_f ) {
 689                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 690         }
 691
 692         /* Set LDAP version. This will always succeed: If the client
 693          * bound with a particular version, then so can we.
 694          */
 695         if ( li->li_version != 0 ) {
 696                 version = li->li_version;
 697
 698         } else if ( op->o_protocol != 0 ) {
 699                 version = op->o_protocol;
 700
 701         } else {
 702                 /* assume it's an internal op; set to LDAPv3 */
 703                 version = LDAP_VERSION3;
 704         }
 705         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 706
 707         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 708         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 709                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 710
 711         if ( li->li_network_timeout > 0 ) {
 712                 struct timeval          tv;
 713
 714                 tv.tv_sec = li->li_network_timeout;
 715                 tv.tv_usec = 0;
 716                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 717         }
 718
 719 #ifdef HAVE_TLS
 720         if ( LDAP_BACK_CONN_ISPRIV( lc ) ) {
 721                 /* See "rationale" comment in ldap_back_getconn() */
 722                 if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
 723                          li->li_idassert_authmethod != LDAP_AUTH_NONE )
 724                         sb = &li->li_idassert.si_bc;
 725                 else
 726                         sb = &li->li_acl;
 727
 728         } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
 729                 sb = &li->li_idassert.si_bc;
 730
 731         } else {
 732                 sb = &li->li_tls;
 733         }
 734
 735         if ( sb->sb_tls_do_init ) {
 736                 bindconf_tls_set( sb, ld );
 737         } else if ( sb->sb_tls_ctx ) {
 738                 ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
 739         }
 740
 741         /* if required by the bindconf configuration, force TLS */
 742         if ( ( sb == &li->li_acl || sb == &li->li_idassert.si_bc ) &&
 743                 sb->sb_tls_ctx )
 744         {
 745                 flags |= LDAP_BACK_F_USE_TLS;
 746         }
 747
 748         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 749         assert( li->li_uri_mutex_do_not_lock == 0 );
 750         li->li_uri_mutex_do_not_lock = 1;
 751         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 752                         li->li_uri, flags, li->li_nretries, &rs->sr_text );
 753         li->li_uri_mutex_do_not_lock = 0;
 754         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 755         if ( rs->sr_err != LDAP_SUCCESS ) {
 756                 ldap_unbind_ext( ld, NULL, NULL );
 757                 rs->sr_text = "Start TLS failed";
 758                 goto error_return;
 759
 760         } else if ( li->li_idle_timeout ) {
 761                 /* only touch when activity actually took place... */
 762                 lctime = op->o_time;
 763         }
 764 #endif /* HAVE_TLS */
 765
 766         lc->lc_ld = ld;
 767         lc->lc_refcnt = 1;
 768 #ifdef HAVE_TLS
 769         if ( is_tls ) {
 770                 LDAP_BACK_CONN_ISTLS_SET( lc );
 771         } else {
 772                 LDAP_BACK_CONN_ISTLS_CLEAR( lc );
 773         }
 774         if ( lctime != (time_t)(-1) ) {
 775                 lc->lc_time = lctime;
 776         }
 777 #endif /* HAVE_TLS */
 778
 779 error_return:;
 780         if ( rs->sr_err != LDAP_SUCCESS ) {
 781                 rs->sr_err = slap_map_api2result( rs );
 782                 if ( sendok & LDAP_BACK_SENDERR ) {
 783                         if ( rs->sr_text == NULL ) {
 784                                 rs->sr_text = "Proxy connection initialization failed";
 785                         }
 786                         send_ldap_result( op, rs );
 787                 }
 788
 789         } else {
 790                 if ( li->li_conn_ttl > 0 ) {
 791                         lc->lc_create_time = op->o_time;
 792                 }
 793         }
 794
 795         return rs->sr_err;
 796 }
 797
 798 static ldapconn_t *
 799 ldap_back_getconn(
 800         Operation               *op,
 801         SlapReply               *rs,
 802         ldap_back_send_t        sendok,
 803         struct berval           *binddn,
 804         struct berval           *bindcred )
 805 {
 806         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 807         ldapconn_t      *lc = NULL,
 808                         lc_curr = {{ 0 }};
 809         int             refcnt = 1,
 810                         lookupconn = !( sendok & LDAP_BACK_BINDING );
 811
 812         /* if the server is quarantined, and
 813          * - the current interval did not expire yet, or
 814          * - no more retries should occur,
 815          * don't return the connection */
 816         if ( li->li_isquarantined ) {
 817                 slap_retry_info_t       *ri = &li->li_quarantine;
 818                 int                     dont_retry = 1;
 819
 820                 if ( li->li_quarantine.ri_interval ) {
 821                         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
 822                         if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
 823                                 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
 824                                         || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
 825                                 if ( !dont_retry ) {
 826                                         Debug( LDAP_DEBUG_ANY,
 827                                                 "%s: ldap_back_getconn quarantine "
 828                                                 "retry block #%d try #%d.\n",
 829                                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
 830                                         li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
 831                                 }
 832                         }
 833                         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
 834                 }
 835
 836                 if ( dont_retry ) {
 837                         rs->sr_err = LDAP_UNAVAILABLE;
 838                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 839                                 rs->sr_text = "Target is quarantined";
 840                                 send_ldap_result( op, rs );
 841                         }
 842                         return NULL;
 843                 }
 844         }
 845
 846         /* Internal searches are privileged and shared. So is root. */
 847         if ( op->o_do_not_cache || be_isroot( op ) ) {
 848                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 849                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 850                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 851
 852         } else {
 853                 struct berval   tmpbinddn,
 854                                 tmpbindcred,
 855                                 save_o_dn,
 856                                 save_o_ndn;
 857                 int             isproxyauthz;
 858
 859                 /* need cleanup */
 860                 if ( binddn == NULL ) {
 861                         binddn = &tmpbinddn;
 862                 }
 863                 if ( bindcred == NULL ) {
 864                         bindcred = &tmpbindcred;
 865                 }
 866                 if ( op->o_tag == LDAP_REQ_BIND ) {
 867                         save_o_dn = op->o_dn;
 868                         save_o_ndn = op->o_ndn;
 869                         op->o_dn = op->o_req_dn;
 870                         op->o_ndn = op->o_req_ndn;
 871                 }
 872                 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
 873                 if ( op->o_tag == LDAP_REQ_BIND ) {
 874                         op->o_dn = save_o_dn;
 875                         op->o_ndn = save_o_ndn;
 876                 }
 877                 if ( isproxyauthz == -1 ) {
 878                         return NULL;
 879                 }
 880
 881                 lc_curr.lc_local_ndn = op->o_ndn;
 882                 /* Explicit binds must not be shared;
 883                  * however, explicit binds are piped in a special connection
 884                  * when idassert is to occur with "override" set */
 885                 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
 886                         lc_curr.lc_conn = op->o_conn;
 887
 888                 } else {
 889                         if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
 890                                 lc_curr.lc_local_ndn = *binddn;
 891                                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 892                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 893
 894                         } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
 895                                 lc_curr.lc_local_ndn = slap_empty_bv;
 896                                 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
 897                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 898                                 lookupconn = 1;
 899
 900                         } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
 901                                 lc_curr.lc_conn = op->o_conn;
 902
 903                         } else {
 904                                 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
 905                         }
 906                 }
 907         }
 908
 909         /* Explicit Bind requests always get their own conn */
 910         if ( lookupconn ) {
 911 retry_lock:
 912                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 913                 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
 914                         /* lookup a conn that's not binding */
 915                         LDAP_TAILQ_FOREACH( lc,
 916                                 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
 917                                 lc_q )
 918                         {
 919                                 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
 920                                         break;
 921                                 }
 922                         }
 923
 924                         if ( lc != NULL ) {
 925                                 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 926                                         ldapconn_t, lc_q ) )
 927                                 {
 928                                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 929                                                 lc, lc_q );
 930                                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 931                                         LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 932                                                 lc, lc_q );
 933                                 }
 934
 935                         } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
 936                                 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
 937                         {
 938                                 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
 939                         }
 940
 941                 } else {
 942
 943                         /* Searches for a ldapconn in the avl tree */
 944                         lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 945                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 946                 }
 947
 948                 if ( lc != NULL ) {
 949                         /* Don't reuse connections while they're still binding */
 950                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 951                                 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
 952                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 953
 954                                         ldap_pvt_thread_yield();
 955                                         goto retry_lock;
 956                                 }
 957                                 lc = NULL;
 958                         }
 959
 960                         if ( lc != NULL ) {
 961                                 if ( op->o_tag == LDAP_REQ_BIND ) {
 962                                         /* right now, this is the only possible case */
 963                                         assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
 964                                         LDAP_BACK_CONN_BINDING_SET( lc );
 965                                 }
 966
 967                                 refcnt = ++lc->lc_refcnt;
 968                         }
 969                 }
 970                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 971         }
 972
 973         /* Looks like we didn't get a bind. Open a new session... */
 974         if ( lc == NULL ) {
 975                 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 976                 lc->lc_flags = li->li_flags;
 977                 lc->lc_lcflags = lc_curr.lc_lcflags;
 978                 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 979                         ch_free( lc );
 980                         return NULL;
 981                 }
 982
 983                 if ( sendok & LDAP_BACK_BINDING ) {
 984                         LDAP_BACK_CONN_BINDING_SET( lc );
 985                 }
 986
 987                 lc->lc_conn = lc_curr.lc_conn;
 988                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 989
 990                 /*
 991                  * the rationale is: connections as the rootdn are privileged,
 992                  * so li_acl is to be used; however, in some cases
 993                  * one already configured identity assertion with a highly
 994                  * privileged idassert_authcDN, so if li_acl is not configured
 995                  * and idassert is, use idassert instead.
 996                  *
 997                  * might change in the future, because it's preferable
 998                  * to make clear what identity is being used, since
 999                  * the only drawback is that one risks to configure
1000                  * the same identity twice...
1001                  */
1002                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
1003                         if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
1004                                  li->li_idassert_authmethod != LDAP_AUTH_NONE ) {
1005                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
1006                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
1007
1008                         } else {
1009                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
1010                                 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
1011                         }
1012                         LDAP_BACK_CONN_ISPRIV_SET( lc );
1013
1014                 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
1015                         if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
1016                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
1017                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
1018                         }
1019                         LDAP_BACK_CONN_ISIDASSERT_SET( lc );
1020
1021                 } else {
1022                         BER_BVZERO( &lc->lc_cred );
1023                         BER_BVZERO( &lc->lc_bound_ndn );
1024                         if ( !BER_BVISEMPTY( &op->o_ndn )
1025                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
1026                         {
1027                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
1028                         }
1029                 }
1030
1031 #ifdef HAVE_TLS
1032                 /* if start TLS failed but it was not mandatory,
1033                  * check if the non-TLS connection was already
1034                  * in cache; in case, destroy the newly created
1035                  * connection and use the existing one */
1036                 if ( LDAP_BACK_PCONN_ISTLS( lc )
1037                                 && !ldap_tls_inplace( lc->lc_ld ) )
1038                 {
1039                         ldapconn_t      *tmplc = NULL;
1040                         int             idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
1041
1042                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1043                         LDAP_TAILQ_FOREACH( tmplc,
1044                                 &li->li_conn_priv[ idx ].lic_priv,
1045                                 lc_q )
1046                         {
1047                                 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
1048                                         break;
1049                                 }
1050                         }
1051
1052                         if ( tmplc != NULL ) {
1053                                 refcnt = ++tmplc->lc_refcnt;
1054                                 ldap_back_conn_free( lc );
1055                                 lc = tmplc;
1056                         }
1057                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1058
1059                         if ( tmplc != NULL ) {
1060                                 goto done;
1061                         }
1062                 }
1063 #endif /* HAVE_TLS */
1064
1065                 /* Inserts the newly created ldapconn in the avl tree */
1066                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1067
1068                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1069
1070                 assert( lc->lc_refcnt == 1 );
1071
1072 #if LDAP_BACK_PRINT_CONNTREE > 0
1073                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
1074 #endif /* LDAP_BACK_PRINT_CONNTREE */
1075
1076                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1077                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
1078                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
1079                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
1080                                 LDAP_BACK_CONN_CACHED_SET( lc );
1081
1082                         } else {
1083                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1084                         }
1085                         rs->sr_err = 0;
1086
1087                 } else {
1088                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
1089                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
1090                         LDAP_BACK_CONN_CACHED_SET( lc );
1091                 }
1092
1093 #if LDAP_BACK_PRINT_CONNTREE > 0
1094                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
1095 #endif /* LDAP_BACK_PRINT_CONNTREE */
1096
1097                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1098
1099                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1100                         char    buf[ SLAP_TEXT_BUFLEN ];
1101
1102                         snprintf( buf, sizeof( buf ),
1103                                 "lc=%p inserted refcnt=%u rc=%d",
1104                                 (void *)lc, refcnt, rs->sr_err );
1105
1106                         Debug( LDAP_DEBUG_TRACE,
1107                                 "=>ldap_back_getconn: %s: %s\n",
1108                                 op->o_log_prefix, buf, 0 );
1109                 }
1110
1111                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1112                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1113                         switch ( rs->sr_err ) {
1114                         case 0:
1115                                 break;
1116
1117                         case -1:
1118                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1119                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1120                                         /* duplicate: free and try to get the newly created one */
1121                                         ldap_back_conn_free( lc );
1122                                         lc = NULL;
1123                                         goto retry_lock;
1124                                 }
1125
1126                                 /* taint connection, so that it'll be freed when released */
1127                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1128                                 break;
1129
1130                         default:
1131                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1132                                 ldap_back_conn_free( lc );
1133                                 rs->sr_err = LDAP_OTHER;
1134                                 rs->sr_text = "Proxy bind collision";
1135                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1136                                         send_ldap_result( op, rs );
1137                                 }
1138                                 return NULL;
1139                         }
1140                 }
1141
1142         } else {
1143                 int     expiring = 0;
1144
1145                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1146                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1147                 {
1148                         expiring = 1;
1149
1150                         /* let it be used, but taint/delete it so that
1151                          * no-one else can look it up any further */
1152                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1153
1154 #if LDAP_BACK_PRINT_CONNTREE > 0
1155                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1156 #endif /* LDAP_BACK_PRINT_CONNTREE */
1157
1158                         (void)ldap_back_conn_delete( li, lc );
1159                         LDAP_BACK_CONN_TAINTED_SET( lc );
1160
1161 #if LDAP_BACK_PRINT_CONNTREE > 0
1162                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1163 #endif /* LDAP_BACK_PRINT_CONNTREE */
1164
1165                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1166                 }
1167
1168                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1169                         char    buf[ SLAP_TEXT_BUFLEN ];
1170
1171                         snprintf( buf, sizeof( buf ),
1172                                 "conn %p fetched refcnt=%u%s",
1173                                 (void *)lc, refcnt,
1174                                 expiring ? " expiring" : "" );
1175                         Debug( LDAP_DEBUG_TRACE,
1176                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1177                 }
1178         }
1179
1180 #ifdef HAVE_TLS
1181 done:;
1182 #endif /* HAVE_TLS */
1183
1184         return lc;
1185 }
1186
1187 void
1188 ldap_back_release_conn_lock(
1189         ldapinfo_t              *li,
1190         ldapconn_t              **lcp,
1191         int                     dolock )
1192 {
1193
1194         ldapconn_t      *lc = *lcp;
1195
1196         if ( dolock ) {
1197                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1198         }
1199         assert( lc->lc_refcnt > 0 );
1200         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1201         lc->lc_refcnt--;
1202         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1203                 ldap_back_freeconn( li, lc, 0 );
1204                 *lcp = NULL;
1205         }
1206         if ( dolock ) {
1207                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1208         }
1209 }
1210
1211 void
1212 ldap_back_quarantine(
1213         Operation       *op,
1214         SlapReply       *rs )
1215 {
1216         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1217
1218         slap_retry_info_t       *ri = &li->li_quarantine;
1219
1220         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1221
1222         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1223                 time_t          new_last = slap_get_time();
1224
1225                 switch ( li->li_isquarantined ) {
1226                 case LDAP_BACK_FQ_NO:
1227                         if ( ri->ri_last == new_last ) {
1228                                 goto done;
1229                         }
1230
1231                         Debug( LDAP_DEBUG_ANY,
1232                                 "%s: ldap_back_quarantine enter.\n",
1233                                 op->o_log_prefix, 0, 0 );
1234
1235                         ri->ri_idx = 0;
1236                         ri->ri_count = 0;
1237                         break;
1238
1239                 case LDAP_BACK_FQ_RETRYING:
1240                         Debug( LDAP_DEBUG_ANY,
1241                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1242                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1243
1244                         ++ri->ri_count;
1245                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1246                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1247                         {
1248                                 ri->ri_count = 0;
1249                                 ++ri->ri_idx;
1250                         }
1251                         break;
1252
1253                 default:
1254                         break;
1255                 }
1256
1257                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1258                 ri->ri_last = new_last;
1259
1260         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1261                 if ( ri->ri_last == slap_get_time() ) {
1262                         goto done;
1263                 }
1264
1265                 Debug( LDAP_DEBUG_ANY,
1266                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1267                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1268
1269                 if ( li->li_quarantine_f ) {
1270                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1271                 }
1272
1273                 ri->ri_count = 0;
1274                 ri->ri_idx = 0;
1275                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1276         }
1277
1278 done:;
1279         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1280 }
1281
1282 static int
1283 ldap_back_dobind_cb(
1284         Operation *op,
1285         SlapReply *rs
1286 )
1287 {
1288         ber_tag_t *tptr = op->o_callback->sc_private;
1289         op->o_tag = *tptr;
1290         rs->sr_tag = slap_req2res( op->o_tag );
1291
1292         return SLAP_CB_CONTINUE;
1293 }
1294
1295 /*
1296  * ldap_back_dobind_int
1297  *
1298  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1299  */
1300 static int
1301 ldap_back_dobind_int(
1302         ldapconn_t              **lcp,
1303         Operation               *op,
1304         SlapReply               *rs,
1305         ldap_back_send_t        sendok,
1306         int                     retries,
1307         int                     dolock )
1308 {
1309         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1310
1311         ldapconn_t      *lc;
1312         struct berval   binddn = slap_empty_bv,
1313                         bindcred = slap_empty_bv;
1314
1315         int             rc = 0,
1316                         isbound,
1317                         binding = 0;
1318         ber_int_t       msgid;
1319         ber_tag_t       o_tag = op->o_tag;
1320         slap_callback cb = {0};
1321         char            *tmp_dn;
1322
1323         assert( lcp != NULL );
1324         assert( retries >= 0 );
1325
1326         if ( sendok & LDAP_BACK_GETCONN ) {
1327                 assert( *lcp == NULL );
1328
1329                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1330                 if ( lc == NULL ) {
1331                         return 0;
1332                 }
1333                 *lcp = lc;
1334
1335         } else {
1336                 lc = *lcp;
1337         }
1338
1339         assert( lc != NULL );
1340
1341 retry_lock:;
1342         if ( dolock ) {
1343                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1344         }
1345
1346         if ( binding == 0 ) {
1347                 /* check if already bound */
1348                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1349                 if ( isbound ) {
1350                         if ( dolock ) {
1351                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1352                         }
1353                         return rc;
1354                 }
1355
1356                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1357                         /* if someone else is about to bind it, give up and retry */
1358                         if ( dolock ) {
1359                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1360                         }
1361                         ldap_pvt_thread_yield();
1362                         goto retry_lock;
1363
1364                 } else {
1365                         /* otherwise this thread will bind it */
1366                         LDAP_BACK_CONN_BINDING_SET( lc );
1367                         binding = 1;
1368                 }
1369         }
1370
1371         if ( dolock ) {
1372                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1373         }
1374
1375         /*
1376          * FIXME: we need to let clients use proxyAuthz
1377          * otherwise we cannot do symmetric pools of servers;
1378          * we have to live with the fact that a user can
1379          * authorize itself as any ID that is allowed
1380          * by the authzTo directive of the "proxyauthzdn".
1381          */
1382         /*
1383          * NOTE: current Proxy Authorization specification
1384          * and implementation do not allow proxy authorization
1385          * control to be provided with Bind requests
1386          */
1387         /*
1388          * if no bind took place yet, but the connection is bound
1389          * and the "idassert-authcDN" (or other ID) is set,
1390          * then bind as the asserting identity and explicitly
1391          * add the proxyAuthz control to every operation with the
1392          * dn bound to the connection as control value.
1393          * This is done also if this is the authorizing backend,
1394          * but the "override" flag is given to idassert.
1395          * It allows to use SASL bind and yet proxyAuthz users
1396          */
1397         op->o_tag = LDAP_REQ_BIND;
1398         cb.sc_next = op->o_callback;
1399         cb.sc_private = &o_tag;
1400         cb.sc_response = ldap_back_dobind_cb;
1401         op->o_callback = &cb;
1402
1403         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1404                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1405                         /* if we got here, it shouldn't return result */
1406                         rc = ldap_back_is_proxy_authz( op, rs,
1407                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1408                         if ( rc != 1 ) {
1409                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_back_is_proxy_authz "
1410                                         "returned %d, misconfigured URI?\n", rc, 0, 0 );
1411                                 rs->sr_err = LDAP_OTHER;
1412                                 rs->sr_text = "misconfigured URI?";
1413                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1414                                 if ( sendok & LDAP_BACK_SENDERR ) {
1415                                         send_ldap_result( op, rs );
1416                                 }
1417                                 goto done;
1418                         }
1419                 }
1420                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1421                 goto done;
1422         }
1423
1424 #ifdef HAVE_CYRUS_SASL
1425         if ( LDAP_BACK_CONN_ISPRIV( lc )) {
1426         slap_bindconf *sb;
1427         if ( li->li_acl_authmethod != LDAP_AUTH_NONE )
1428                 sb = &li->li_acl;
1429         else
1430                 sb = &li->li_idassert.si_bc;
1431
1432         if ( sb->sb_method == LDAP_AUTH_SASL ) {
1433                 void            *defaults = NULL;
1434
1435                 if ( sb->sb_secprops != NULL ) {
1436                         rc = ldap_set_option( lc->lc_ld,
1437                                 LDAP_OPT_X_SASL_SECPROPS, sb->sb_secprops );
1438
1439                         if ( rc != LDAP_OPT_SUCCESS ) {
1440                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1441                                         "(SECPROPS,\"%s\") failed!\n",
1442                                         sb->sb_secprops, 0, 0 );
1443                                 goto done;
1444                         }
1445                 }
1446
1447                 defaults = lutil_sasl_defaults( lc->lc_ld,
1448                                 sb->sb_saslmech.bv_val,
1449                                 sb->sb_realm.bv_val,
1450                                 sb->sb_authcId.bv_val,
1451                                 sb->sb_cred.bv_val,
1452                                 NULL );
1453                 if ( defaults == NULL ) {
1454                         rs->sr_err = LDAP_OTHER;
1455                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1456                         if ( sendok & LDAP_BACK_SENDERR ) {
1457                                 send_ldap_result( op, rs );
1458                         }
1459                         goto done;
1460                 }
1461
1462                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1463                                 sb->sb_binddn.bv_val,
1464                                 sb->sb_saslmech.bv_val, NULL, NULL,
1465                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1466                                 defaults );
1467
1468                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1469                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1470                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1471
1472                 lutil_sasl_freedefs( defaults );
1473
1474                 switch ( rs->sr_err ) {
1475                 case LDAP_SUCCESS:
1476                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1477                         break;
1478
1479                 case LDAP_LOCAL_ERROR:
1480                         /* list client API error codes that require
1481                          * to taint the connection */
1482                         /* FIXME: should actually retry? */
1483                         LDAP_BACK_CONN_TAINTED_SET( lc );
1484
1485                         /* fallthru */
1486
1487                 default:
1488                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1489                         rs->sr_err = slap_map_api2result( rs );
1490                         if ( sendok & LDAP_BACK_SENDERR ) {
1491                                 send_ldap_result( op, rs );
1492                         }
1493                         break;
1494                 }
1495
1496                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1497                         ldap_back_quarantine( op, rs );
1498                 }
1499
1500                 goto done;
1501         }
1502         }
1503 #endif /* HAVE_CYRUS_SASL */
1504
1505 retry:;
1506         if ( BER_BVISNULL( &lc->lc_cred ) ) {
1507                 tmp_dn = "";
1508                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) && !BER_BVISEMPTY( &lc->lc_bound_ndn ) ) {
1509                         Debug( LDAP_DEBUG_ANY, "%s ldap_back_dobind_int: DN=\"%s\" without creds, binding anonymously",
1510                                 op->o_log_prefix, lc->lc_bound_ndn.bv_val, 0 );
1511                 }
1512
1513         } else {
1514                 tmp_dn = lc->lc_bound_ndn.bv_val;
1515         }
1516         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1517                         tmp_dn,
1518                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1519                         NULL, NULL, &msgid );
1520
1521         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1522         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1523         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1524
1525         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1526                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1527                         if ( dolock ) {
1528                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1529                         }
1530
1531                         assert( lc->lc_refcnt > 0 );
1532                         if ( lc->lc_refcnt == 1 ) {
1533                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1534                                 lc->lc_ld = NULL;
1535
1536                                 /* lc here must be the regular lc, reset and ready for init */
1537                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1538                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1539                                         sendok &= ~LDAP_BACK_SENDERR;
1540                                         lc->lc_refcnt = 0;
1541                                 }
1542                         }
1543
1544                         if ( dolock ) {
1545                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1546                         }
1547
1548                         if ( rs->sr_err == LDAP_SUCCESS ) {
1549                                 if ( retries > 0 ) {
1550                                         retries--;
1551                                 }
1552                                 goto retry;
1553                         }
1554                 }
1555
1556                 assert( lc->lc_refcnt == 1 );
1557                 lc->lc_refcnt = 0;
1558                 ldap_back_freeconn( li, lc, dolock );
1559                 *lcp = NULL;
1560                 rs->sr_err = slap_map_api2result( rs );
1561
1562                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1563                         ldap_back_quarantine( op, rs );
1564                 }
1565
1566                 if ( rs->sr_err != LDAP_SUCCESS &&
1567                         ( sendok & LDAP_BACK_SENDERR ) )
1568                 {
1569                         if ( op->o_callback == &cb )
1570                                 op->o_callback = cb.sc_next;
1571                         op->o_tag = o_tag;
1572                         rs->sr_text = "Proxy can't contact remote server";
1573                         send_ldap_result( op, rs );
1574                 }
1575
1576                 rc = 0;
1577                 goto func_leave;
1578         }
1579
1580         rc = ldap_back_op_result( lc, op, rs, msgid,
1581                 -1, ( sendok | LDAP_BACK_BINDING ) );
1582         if ( rc == LDAP_SUCCESS ) {
1583                 op->o_conn->c_authz_cookie = op->o_bd->be_private;
1584                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1585         }
1586
1587 done:;
1588         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1589         rc = LDAP_BACK_CONN_ISBOUND( lc );
1590         if ( !rc ) {
1591                 ldap_back_release_conn_lock( li, lcp, dolock );
1592
1593         } else if ( LDAP_BACK_SAVECRED( li ) ) {
1594                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1595         }
1596
1597 func_leave:;
1598         if ( op->o_callback == &cb )
1599                 op->o_callback = cb.sc_next;
1600         op->o_tag = o_tag;
1601
1602         return rc;
1603 }
1604
1605 /*
1606  * ldap_back_dobind
1607  *
1608  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1609  */
1610 int
1611 ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1612 {
1613         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1614
1615         return ldap_back_dobind_int( lcp, op, rs,
1616                 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
1617 }
1618
1619 /*
1620  * ldap_back_default_rebind
1621  *
1622  * This is a callback used for chasing referrals using the same
1623  * credentials as the original user on this session.
1624  */
1625 int
1626 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1627         ber_int_t msgid, void *params )
1628 {
1629         ldapconn_t      *lc = (ldapconn_t *)params;
1630
1631 #ifdef HAVE_TLS
1632         /* ... otherwise we couldn't get here */
1633         assert( lc != NULL );
1634
1635         if ( !ldap_tls_inplace( ld ) ) {
1636                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1637                                 rc;
1638                 const char      *text = NULL;
1639
1640                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1641                         LDAP_BACK_RETRY_DEFAULT, &text );
1642                 if ( rc != LDAP_SUCCESS ) {
1643                         return rc;
1644                 }
1645         }
1646 #endif /* HAVE_TLS */
1647
1648         /* FIXME: add checks on the URL/identity? */
1649         /* TODO: would like to count this bind operation for monitoring
1650          * too, but where do we get the ldapinfo_t? */
1651
1652         return ldap_sasl_bind_s( ld,
1653                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1654                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1655 }
1656
1657 /*
1658  * ldap_back_default_urllist
1659  */
1660 int
1661 ldap_back_default_urllist(
1662         LDAP            *ld,
1663         LDAPURLDesc     **urllist,
1664         LDAPURLDesc     **url,
1665         void            *params )
1666 {
1667         ldapinfo_t      *li = (ldapinfo_t *)params;
1668         LDAPURLDesc     **urltail;
1669
1670         if ( urllist == url ) {
1671                 return LDAP_SUCCESS;
1672         }
1673
1674         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1675                 /* count */ ;
1676
1677         *urltail = *urllist;
1678         *urllist = *url;
1679         *url = NULL;
1680
1681         if ( !li->li_uri_mutex_do_not_lock ) {
1682                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1683         }
1684
1685         if ( li->li_uri ) {
1686                 ch_free( li->li_uri );
1687         }
1688
1689         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1690
1691         if ( !li->li_uri_mutex_do_not_lock ) {
1692                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1693         }
1694
1695         return LDAP_SUCCESS;
1696 }
1697
1698 int
1699 ldap_back_cancel(
1700                 ldapconn_t              *lc,
1701                 Operation               *op,
1702                 SlapReply               *rs,
1703                 ber_int_t               msgid,
1704                 ldap_back_send_t        sendok )
1705 {
1706         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1707
1708         /* default behavior */
1709         if ( LDAP_BACK_ABANDON( li ) ) {
1710                 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1711         }
1712
1713         if ( LDAP_BACK_IGNORE( li ) ) {
1714                 return ldap_pvt_discard( lc->lc_ld, msgid );
1715         }
1716
1717         if ( LDAP_BACK_CANCEL( li ) ) {
1718                 /* FIXME: asynchronous? */
1719                 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
1720         }
1721
1722         assert( 0 );
1723
1724         return LDAP_OTHER;
1725 }
1726
1727 int
1728 ldap_back_op_result(
1729                 ldapconn_t              *lc,
1730                 Operation               *op,
1731                 SlapReply               *rs,
1732                 ber_int_t               msgid,
1733                 time_t                  timeout,
1734                 ldap_back_send_t        sendok )
1735 {
1736         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1737
1738         char            *match = NULL;
1739         char            *text = NULL;
1740         char            **refs = NULL;
1741         LDAPControl     **ctrls = NULL;
1742
1743         rs->sr_text = NULL;
1744         rs->sr_matched = NULL;
1745         rs->sr_ref = NULL;
1746         rs->sr_ctrls = NULL;
1747
1748         /* if the error recorded in the reply corresponds
1749          * to a successful state, get the error from the
1750          * remote server response */
1751         if ( LDAP_ERR_OK( rs->sr_err ) ) {
1752                 int             rc;
1753                 struct timeval  tv;
1754                 LDAPMessage     *res = NULL;
1755                 time_t          stoptime = (time_t)(-1);
1756                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1757                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1758                 const char      *timeout_text = "Operation timed out";
1759
1760                 /* if timeout is not specified, compute and use
1761                  * the one specific to the ongoing operation */
1762                 if ( timeout == (time_t)(-1) ) {
1763                         slap_op_t       opidx = slap_req2op( op->o_tag );
1764
1765                         if ( opidx == SLAP_OP_SEARCH ) {
1766                                 if ( op->ors_tlimit <= 0 ) {
1767                                         timeout = 0;
1768
1769                                 } else {
1770                                         timeout = op->ors_tlimit;
1771                                         timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1772                                         timeout_text = NULL;
1773                                 }
1774
1775                         } else {
1776                                 timeout = li->li_timeout[ opidx ];
1777                         }
1778                 }
1779
1780                 /* better than nothing :) */
1781                 if ( timeout == 0 ) {
1782                         if ( li->li_idle_timeout ) {
1783                                 timeout = li->li_idle_timeout;
1784
1785                         } else if ( li->li_conn_ttl ) {
1786                                 timeout = li->li_conn_ttl;
1787                         }
1788                 }
1789
1790                 if ( timeout ) {
1791                         stoptime = op->o_time + timeout;
1792                 }
1793
1794                 LDAP_BACK_TV_SET( &tv );
1795
1796 retry:;
1797                 /* if result parsing fails, note the failure reason */
1798                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1799                 switch ( rc ) {
1800                 case 0:
1801                         if ( timeout && slap_get_time() > stoptime ) {
1802                                 if ( sendok & LDAP_BACK_BINDING ) {
1803                                         ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1804                                         lc->lc_ld = NULL;
1805
1806                                         /* let it be used, but taint/delete it so that
1807                                          * no-one else can look it up any further */
1808                                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1809
1810 #if LDAP_BACK_PRINT_CONNTREE > 0
1811                                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1812 #endif /* LDAP_BACK_PRINT_CONNTREE */
1813
1814                                         (void)ldap_back_conn_delete( li, lc );
1815                                         LDAP_BACK_CONN_TAINTED_SET( lc );
1816
1817 #if LDAP_BACK_PRINT_CONNTREE > 0
1818                                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1819 #endif /* LDAP_BACK_PRINT_CONNTREE */
1820                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1821
1822                                 } else {
1823                                         (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
1824                                 }
1825                                 rs->sr_err = timeout_err;
1826                                 rs->sr_text = timeout_text;
1827                                 break;
1828                         }
1829
1830                         /* timeout == 0 */
1831                         LDAP_BACK_TV_SET( &tv );
1832                         ldap_pvt_thread_yield();
1833                         goto retry;
1834
1835                 case -1:
1836                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1837                                         &rs->sr_err );
1838                         break;
1839
1840
1841                 /* otherwise get the result; if it is not
1842                  * LDAP_SUCCESS, record it in the reply
1843                  * structure (this includes
1844                  * LDAP_COMPARE_{TRUE|FALSE}) */
1845                 default:
1846                         /* only touch when activity actually took place... */
1847                         if ( li->li_idle_timeout && lc ) {
1848                                 lc->lc_time = op->o_time;
1849                         }
1850
1851                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1852                                         &match, &text, &refs, &ctrls, 1 );
1853                         if ( rc == LDAP_SUCCESS ) {
1854                                 rs->sr_text = text;
1855                         } else {
1856                                 rs->sr_err = rc;
1857                         }
1858                         rs->sr_err = slap_map_api2result( rs );
1859
1860                         /* RFC 4511: referrals can only appear
1861                          * if result code is LDAP_REFERRAL */
1862                         if ( refs != NULL
1863                                 && refs[ 0 ] != NULL
1864                                 && refs[ 0 ][ 0 ] != '\0' )
1865                         {
1866                                 if ( rs->sr_err != LDAP_REFERRAL ) {
1867                                         Debug( LDAP_DEBUG_ANY,
1868                                                 "%s ldap_back_op_result: "
1869                                                 "got referrals with err=%d\n",
1870                                                 op->o_log_prefix,
1871                                                 rs->sr_err, 0 );
1872
1873                                 } else {
1874                                         int     i;
1875
1876                                         for ( i = 0; refs[ i ] != NULL; i++ )
1877                                                 /* count */ ;
1878                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1879                                                 op->o_tmpmemctx );
1880                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1881                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1882                                         }
1883                                         BER_BVZERO( &rs->sr_ref[ i ] );
1884                                 }
1885
1886                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
1887                                 Debug( LDAP_DEBUG_ANY,
1888                                         "%s ldap_back_op_result: "
1889                                         "got err=%d with null "
1890                                         "or empty referrals\n",
1891                                         op->o_log_prefix,
1892                                         rs->sr_err, 0 );
1893
1894                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1895                         }
1896
1897                         if ( ctrls != NULL ) {
1898                                 rs->sr_ctrls = ctrls;
1899                         }
1900                 }
1901         }
1902
1903         /* if the error in the reply structure is not
1904          * LDAP_SUCCESS, try to map it from client
1905          * to server error */
1906         if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1907                 rs->sr_err = slap_map_api2result( rs );
1908
1909                 /* internal ops ( op->o_conn == NULL )
1910                  * must not reply to client */
1911                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1912
1913                         /* record the (massaged) matched
1914                          * DN into the reply structure */
1915                         rs->sr_matched = match;
1916                 }
1917         }
1918
1919         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1920                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1921                         if ( LDAP_BACK_QUARANTINE( li ) ) {
1922                                 ldap_back_quarantine( op, rs );
1923                         }
1924                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1925                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1926                                 send_ldap_result( op, rs );
1927                         }
1928                 }
1929
1930         } else if ( op->o_conn &&
1931                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1932                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1933         {
1934                 send_ldap_result( op, rs );
1935         }
1936
1937         if ( text ) {
1938                 ldap_memfree( text );
1939         }
1940         rs->sr_text = NULL;
1941
1942         /* there can't be refs with a (successful) bind */
1943         if ( rs->sr_ref ) {
1944                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1945                 rs->sr_ref = NULL;
1946         }
1947
1948         if ( refs ) {
1949                 ber_memvfree( (void **)refs );
1950         }
1951
1952         /* match should not be possible with a successful bind */
1953         if ( match ) {
1954                 if ( rs->sr_matched != match ) {
1955                         free( (char *)rs->sr_matched );
1956                 }
1957                 rs->sr_matched = NULL;
1958                 ldap_memfree( match );
1959         }
1960
1961         if ( ctrls != NULL ) {
1962                 if ( op->o_tag == LDAP_REQ_BIND && rs->sr_err == LDAP_SUCCESS ) {
1963                         int i;
1964
1965                         for ( i = 0; ctrls[i] != NULL; i++ );
1966
1967                         rs->sr_ctrls = op->o_tmpalloc( sizeof( LDAPControl * )*( i + 1 ),
1968                                 op->o_tmpmemctx );
1969                         for ( i = 0; ctrls[ i ] != NULL; i++ ) {
1970                                 char *ptr;
1971                                 ber_len_t oidlen = strlen( ctrls[i]->ldctl_oid );
1972                                 ber_len_t size = sizeof( LDAPControl )
1973                                         + oidlen + 1
1974                                         + ctrls[i]->ldctl_value.bv_len + 1;
1975
1976                                 rs->sr_ctrls[ i ] = op->o_tmpalloc( size, op->o_tmpmemctx );
1977                                 rs->sr_ctrls[ i ]->ldctl_oid = (char *)&rs->sr_ctrls[ i ][ 1 ];
1978                                 lutil_strcopy( rs->sr_ctrls[ i ]->ldctl_oid, ctrls[i]->ldctl_oid );
1979                                 rs->sr_ctrls[ i ]->ldctl_value.bv_val
1980                                                 = (char *)&rs->sr_ctrls[ i ]->ldctl_oid[oidlen + 1];
1981                                 rs->sr_ctrls[ i ]->ldctl_value.bv_len
1982                                         = ctrls[i]->ldctl_value.bv_len;
1983                                 ptr = lutil_memcopy( rs->sr_ctrls[ i ]->ldctl_value.bv_val,
1984                                         ctrls[i]->ldctl_value.bv_val, ctrls[i]->ldctl_value.bv_len );
1985                                 *ptr = '\0';
1986                         }
1987                         rs->sr_ctrls[ i ] = NULL;
1988                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
1989
1990                 } else {
1991                         assert( rs->sr_ctrls != NULL );
1992                         rs->sr_ctrls = NULL;
1993                 }
1994
1995                 ldap_controls_free( ctrls );
1996         }
1997
1998         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1999 }
2000
2001 /* return true if bound, false if failed */
2002 int
2003 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
2004 {
2005         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2006         int             rc = 0;
2007
2008         assert( lcp != NULL );
2009         assert( *lcp != NULL );
2010
2011         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
2012
2013         if ( (*lcp)->lc_refcnt == 1 ) {
2014                 int binding = LDAP_BACK_CONN_BINDING( *lcp );
2015
2016                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
2017                 Debug( LDAP_DEBUG_ANY,
2018                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
2019                         op->o_log_prefix, li->li_uri,
2020                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
2021                                 "" : (*lcp)->lc_bound_ndn.bv_val );
2022                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
2023
2024                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
2025                 (*lcp)->lc_ld = NULL;
2026                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
2027
2028                 /* lc here must be the regular lc, reset and ready for init */
2029                 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok );
2030                 if ( rc != LDAP_SUCCESS ) {
2031                         /* freeit, because lc_refcnt == 1 */
2032                         (*lcp)->lc_refcnt = 0;
2033                         (void)ldap_back_freeconn( li, *lcp, 0 );
2034                         *lcp = NULL;
2035                         rc = 0;
2036
2037                 } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
2038                         if ( binding ) {
2039                                 LDAP_BACK_CONN_BINDING_SET( *lcp );
2040                         }
2041                         rc = 1;
2042
2043                 } else {
2044                         rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
2045                         if ( rc == 0 && *lcp != NULL ) {
2046                                 /* freeit, because lc_refcnt == 1 */
2047                                 (*lcp)->lc_refcnt = 0;
2048                                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
2049                                 (void)ldap_back_freeconn( li, *lcp, 0 );
2050                                 *lcp = NULL;
2051                         }
2052                 }
2053
2054         } else {
2055                 Debug( LDAP_DEBUG_TRACE,
2056                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
2057                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
2058
2059                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
2060                 ldap_back_release_conn_lock( li, lcp, 0 );
2061                 assert( *lcp == NULL );
2062
2063                 if ( sendok & LDAP_BACK_SENDERR ) {
2064                         rs->sr_err = LDAP_UNAVAILABLE;
2065                         rs->sr_text = "Unable to retry";
2066                         send_ldap_result( op, rs );
2067                 }
2068         }
2069
2070         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
2071
2072         return rc;
2073 }
2074
2075 static int
2076 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
2077         struct berval *binddn, struct berval *bindcred )
2078 {
2079         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2080         struct berval   ndn;
2081         int             dobind = 0;
2082
2083         if ( op->o_conn == NULL || op->o_do_not_cache ) {
2084                 goto done;
2085         }
2086
2087         /* don't proxyAuthz if protocol is not LDAPv3 */
2088         switch ( li->li_version ) {
2089         case LDAP_VERSION3:
2090                 break;
2091
2092         case 0:
2093                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2094                         break;
2095                 }
2096                 /* fall thru */
2097
2098         default:
2099                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2100                 if ( sendok & LDAP_BACK_SENDERR ) {
2101                         send_ldap_result( op, rs );
2102                         dobind = -1;
2103                 }
2104                 goto done;
2105         }
2106
2107         /* safe default */
2108         *binddn = slap_empty_bv;
2109         *bindcred = slap_empty_bv;
2110
2111         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2112                 ndn = op->o_conn->c_ndn;
2113
2114         } else {
2115                 ndn = op->o_ndn;
2116         }
2117
2118         switch ( li->li_idassert_mode ) {
2119         case LDAP_BACK_IDASSERT_LEGACY:
2120                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
2121                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
2122                         {
2123                                 *binddn = li->li_idassert_authcDN;
2124                                 *bindcred = li->li_idassert_passwd;
2125                                 dobind = 1;
2126                         }
2127                 }
2128                 break;
2129
2130         default:
2131                 /* NOTE: rootdn can always idassert */
2132                 if ( BER_BVISNULL( &ndn )
2133                         && li->li_idassert_authz == NULL
2134                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
2135                 {
2136                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2137                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
2138                                 if ( sendok & LDAP_BACK_SENDERR ) {
2139                                         send_ldap_result( op, rs );
2140                                         dobind = -1;
2141                                 }
2142
2143                         } else {
2144                                 rs->sr_err = LDAP_SUCCESS;
2145                                 *binddn = slap_empty_bv;
2146                                 *bindcred = slap_empty_bv;
2147                                 break;
2148                         }
2149
2150                         goto done;
2151
2152                 } else if ( !be_isroot( op ) ) {
2153                         if ( li->li_idassert_passthru ) {
2154                                 struct berval authcDN;
2155
2156                                 if ( BER_BVISNULL( &ndn ) ) {
2157                                         authcDN = slap_empty_bv;
2158
2159                                 } else {
2160                                         authcDN = ndn;
2161                                 }
2162                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_passthru,
2163                                                 &authcDN, &authcDN );
2164                                 if ( rs->sr_err == LDAP_SUCCESS ) {
2165                                         dobind = 0;
2166                                         break;
2167                                 }
2168                         }
2169
2170                         if ( li->li_idassert_authz ) {
2171                                 struct berval authcDN;
2172
2173                                 if ( BER_BVISNULL( &ndn ) ) {
2174                                         authcDN = slap_empty_bv;
2175
2176                                 } else {
2177                                         authcDN = ndn;
2178                                 }
2179                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
2180                                                 &authcDN, &authcDN );
2181                                 if ( rs->sr_err != LDAP_SUCCESS ) {
2182                                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2183                                                 if ( sendok & LDAP_BACK_SENDERR ) {
2184                                                         send_ldap_result( op, rs );
2185                                                         dobind = -1;
2186                                                 }
2187
2188                                         } else {
2189                                                 rs->sr_err = LDAP_SUCCESS;
2190                                                 *binddn = slap_empty_bv;
2191                                                 *bindcred = slap_empty_bv;
2192                                                 break;
2193                                         }
2194
2195                                         goto done;
2196                                 }
2197                         }
2198                 }
2199
2200                 *binddn = li->li_idassert_authcDN;
2201                 *bindcred = li->li_idassert_passwd;
2202                 dobind = 1;
2203                 break;
2204         }
2205
2206 done:;
2207         return dobind;
2208 }
2209
2210 static int
2211 ldap_back_proxy_authz_bind(
2212         ldapconn_t              *lc,
2213         Operation               *op,
2214         SlapReply               *rs,
2215         ldap_back_send_t        sendok,
2216         struct berval           *binddn,
2217         struct berval           *bindcred )
2218 {
2219         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2220         struct berval   ndn;
2221         int             msgid;
2222         int             rc;
2223
2224         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2225                 ndn = op->o_conn->c_ndn;
2226
2227         } else {
2228                 ndn = op->o_ndn;
2229         }
2230
2231         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
2232 #ifdef HAVE_CYRUS_SASL
2233                 void            *defaults = NULL;
2234                 struct berval   authzID = BER_BVNULL;
2235                 int             freeauthz = 0;
2236                 LDAPControl **ctrlsp = NULL;
2237                 LDAPMessage *result = NULL;
2238                 const char *rmech = NULL;
2239                 const char *save_text = rs->sr_text;
2240
2241 #ifdef SLAP_AUTH_DN
2242                 LDAPControl ctrl, *ctrls[2];
2243                 int msgid;
2244 #endif /* SLAP_AUTH_DN */
2245
2246                 /* if SASL supports native authz, prepare for it */
2247                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
2248                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2249                 {
2250                         switch ( li->li_idassert_mode ) {
2251                         case LDAP_BACK_IDASSERT_OTHERID:
2252                         case LDAP_BACK_IDASSERT_OTHERDN:
2253                                 authzID = li->li_idassert_authzID;
2254                                 break;
2255
2256                         case LDAP_BACK_IDASSERT_ANONYMOUS:
2257                                 BER_BVSTR( &authzID, "dn:" );
2258                                 break;
2259
2260                         case LDAP_BACK_IDASSERT_SELF:
2261                                 if ( BER_BVISNULL( &ndn ) ) {
2262                                         /* connection is not authc'd, so don't idassert */
2263                                         BER_BVSTR( &authzID, "dn:" );
2264                                         break;
2265                                 }
2266                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
2267                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
2268                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
2269                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
2270                                                 ndn.bv_val, ndn.bv_len + 1 );
2271                                 freeauthz = 1;
2272                                 break;
2273
2274                         default:
2275                                 break;
2276                         }
2277                 }
2278
2279                 if ( li->li_idassert_secprops != NULL ) {
2280                         rs->sr_err = ldap_set_option( lc->lc_ld,
2281                                 LDAP_OPT_X_SASL_SECPROPS,
2282                                 (void *)li->li_idassert_secprops );
2283
2284                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
2285                                 rs->sr_err = LDAP_OTHER;
2286                                 if ( sendok & LDAP_BACK_SENDERR ) {
2287                                         send_ldap_result( op, rs );
2288                                 }
2289                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2290                                 goto done;
2291                         }
2292                 }
2293
2294                 defaults = lutil_sasl_defaults( lc->lc_ld,
2295                                 li->li_idassert_sasl_mech.bv_val,
2296                                 li->li_idassert_sasl_realm.bv_val,
2297                                 li->li_idassert_authcID.bv_val,
2298                                 li->li_idassert_passwd.bv_val,
2299                                 authzID.bv_val );
2300                 if ( defaults == NULL ) {
2301                         rs->sr_err = LDAP_OTHER;
2302                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2303                         if ( sendok & LDAP_BACK_SENDERR ) {
2304                                 send_ldap_result( op, rs );
2305                         }
2306                         goto done;
2307                 }
2308
2309 #ifdef SLAP_AUTH_DN
2310                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2311                         assert( BER_BVISNULL( binddn ) );
2312
2313                         ctrl.ldctl_oid = LDAP_CONTROL_AUTHZID_REQUEST;
2314                         ctrl.ldctl_iscritical = 0;
2315                         BER_BVZERO( &ctrl.ldctl_value );
2316                         ctrls[0] = &ctrl;
2317                         ctrls[1] = NULL;
2318                         ctrlsp = ctrls;
2319                 }
2320 #endif /* SLAP_AUTH_DN */
2321
2322                 do {
2323                         rs->sr_err = ldap_sasl_interactive_bind( lc->lc_ld, binddn->bv_val,
2324                                 li->li_idassert_sasl_mech.bv_val,
2325                                 ctrlsp, NULL, LDAP_SASL_QUIET, lutil_sasl_interact, defaults,
2326                                 result, &rmech, &msgid );
2327
2328                         if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS )
2329                                 break;
2330
2331                         ldap_msgfree( result );
2332
2333                         if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) {
2334                                 ldap_get_option( lc->lc_ld, LDAP_OPT_RESULT_CODE, (void*)&rs->sr_err );
2335                                 ldap_get_option( lc->lc_ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&rs->sr_text );
2336                                 break;
2337                         }
2338                 } while ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
2339
2340                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2341                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2342                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2343
2344                 switch ( rs->sr_err ) {
2345                 case LDAP_SUCCESS:
2346 #ifdef SLAP_AUTH_DN
2347                         /* FIXME: right now, the only reason to check
2348                          * response controls is RFC 3829 authzid */
2349                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2350                                 ctrlsp = NULL;
2351                                 rc = ldap_parse_result( lc->lc_ld, result, NULL, NULL, NULL, NULL,
2352                                         &ctrlsp, 0 );
2353                                 if ( rc == LDAP_SUCCESS && ctrlsp ) {
2354                                         LDAPControl *ctrl;
2355
2356                                         ctrl = ldap_control_find( LDAP_CONTROL_AUTHZID_RESPONSE,
2357                                                 ctrlsp, NULL );
2358                                         if ( ctrl ) {
2359                                                 Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (authzid)\n",
2360                                                         op->o_log_prefix, ctrl->ldctl_value.bv_val, 0 );
2361                                                 if ( ctrl->ldctl_value.bv_len > STRLENOF("dn:") &&
2362                                                         strncasecmp( ctrl->ldctl_value.bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2363                                                 {
2364                                                         struct berval bv;
2365                                                         bv.bv_val = &ctrl->ldctl_value.bv_val[STRLENOF("dn:")];
2366                                                         bv.bv_len = ctrl->ldctl_value.bv_len - STRLENOF("dn:");
2367                                                         ber_bvreplace( &lc->lc_bound_ndn, &bv );
2368                                                 }
2369                                         }
2370                                 }
2371
2372                                 ldap_controls_free( ctrlsp );
2373
2374                         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_WHOAMI ) {
2375                                 struct berval *val = NULL;
2376                                 rc = ldap_whoami_s( lc->lc_ld, &val, NULL, NULL );
2377                                 if ( rc == LDAP_SUCCESS && val != NULL ) {
2378                                         Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (whoami)\n",
2379                                                 op->o_log_prefix, val->bv_val, 0 );
2380                                         if ( val->bv_len > STRLENOF("dn:") &&
2381                                                 strncasecmp( val->bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2382                                         {
2383                                                 struct berval bv;
2384                                                 bv.bv_val = &val->bv_val[STRLENOF("dn:")];
2385                                                 bv.bv_len = val->bv_len - STRLENOF("dn:");
2386                                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2387                                         }
2388                                         ber_bvfree( val );
2389                                 }
2390                         }
2391
2392                         if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_MASK ) &&
2393                                 BER_BVISNULL( &lc->lc_bound_ndn ) )
2394                         {
2395                                 /* all in all, we only need it to be non-null */
2396                                 /* FIXME: should this be configurable? */
2397                                 static struct berval bv = BER_BVC("cn=authzdn");
2398                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2399                         }
2400 #endif /* SLAP_AUTH_DN */
2401                         op->o_conn->c_authz_cookie = op->o_bd->be_private;
2402                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2403                         break;
2404
2405                 case LDAP_LOCAL_ERROR:
2406                         /* list client API error codes that require
2407                          * to taint the connection */
2408                         /* FIXME: should actually retry? */
2409                         LDAP_BACK_CONN_TAINTED_SET( lc );
2410
2411                         /* fallthru */
2412
2413                 default:
2414                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2415                         rs->sr_err = slap_map_api2result( rs );
2416                         if ( sendok & LDAP_BACK_SENDERR ) {
2417                                 send_ldap_result( op, rs );
2418                         }
2419                         break;
2420                 }
2421
2422                 if ( save_text != rs->sr_text ) {
2423                         ldap_memfree( (char *)rs->sr_text );
2424                         rs->sr_text = save_text;
2425                 }
2426
2427                 ldap_msgfree( result );
2428
2429                 lutil_sasl_freedefs( defaults );
2430                 if ( freeauthz ) {
2431                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2432                 }
2433
2434                 goto done;
2435 #endif /* HAVE_CYRUS_SASL */
2436         }
2437
2438         switch ( li->li_idassert_authmethod ) {
2439         case LDAP_AUTH_NONE:
2440                 /* FIXME: do we really need this? */
2441                 BER_BVSTR( binddn, "" );
2442                 BER_BVSTR( bindcred, "" );
2443                 /* fallthru */
2444
2445         case LDAP_AUTH_SIMPLE:
2446                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2447                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2448                                 bindcred, NULL, NULL, &msgid );
2449                 rc = ldap_back_op_result( lc, op, rs, msgid,
2450                         -1, ( sendok | LDAP_BACK_BINDING ) );
2451
2452                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2453                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2454                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2455                 break;
2456
2457         default:
2458                 /* unsupported! */
2459                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2460                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2461                 if ( sendok & LDAP_BACK_SENDERR ) {
2462                         send_ldap_result( op, rs );
2463                 }
2464                 goto done;
2465         }
2466
2467         if ( rc == LDAP_SUCCESS ) {
2468                 /* set rebind stuff in case of successful proxyAuthz bind,
2469                  * so that referral chasing is attempted using the right
2470                  * identity */
2471                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2472                 op->o_conn->c_authz_cookie = op->o_bd->be_private;
2473                 if ( !BER_BVISNULL( binddn ) ) {
2474                         ber_bvreplace( &lc->lc_bound_ndn, binddn );
2475                 }
2476
2477                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2478                         memset( lc->lc_cred.bv_val, 0,
2479                                         lc->lc_cred.bv_len );
2480                 }
2481
2482                 if ( LDAP_BACK_SAVECRED( li ) ) {
2483                         if ( !BER_BVISNULL( bindcred ) ) {
2484                                 ber_bvreplace( &lc->lc_cred, bindcred );
2485                                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2486                         }
2487
2488                 } else {
2489                         lc->lc_cred.bv_len = 0;
2490                 }
2491         }
2492
2493 done:;
2494         return LDAP_BACK_CONN_ISBOUND( lc );
2495 }
2496
2497 /*
2498  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2499  * to existing server-side controls if required; if not,
2500  * the existing server-side controls are placed in *pctrls.
2501  * The caller, after using the controls in client API
2502  * operations, if ( *pctrls != op->o_ctrls ), should
2503  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2504  * The function returns success if the control could
2505  * be added if required, or if it did nothing; in the future,
2506  * it might return some error if it failed.
2507  *
2508  * if no bind took place yet, but the connection is bound
2509  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2510  * and explicitly add proxyAuthz the control to every operation
2511  * with the dn bound to the connection as control value.
2512  *
2513  * If no server-side controls are defined for the operation,
2514  * simply add the proxyAuthz control; otherwise, if the
2515  * proxyAuthz control is not already set, add it as
2516  * the first one
2517  *
2518  * FIXME: is controls order significant for security?
2519  * ANSWER: controls ordering and interoperability
2520  * must be indicated by the specs of each control; if none
2521  * is specified, the order is irrelevant.
2522  */
2523 int
2524 ldap_back_proxy_authz_ctrl(
2525                 Operation       *op,
2526                 SlapReply       *rs,
2527                 struct berval   *bound_ndn,
2528                 int             version,
2529                 slap_idassert_t *si,
2530                 LDAPControl     *ctrl )
2531 {
2532         slap_idassert_mode_t    mode;
2533         struct berval           assertedID,
2534                                 ndn;
2535         int                     isroot = 0;
2536
2537         rs->sr_err = SLAP_CB_CONTINUE;
2538
2539         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2540          * but if it is not set this test fails.  We need a different
2541          * means to detect if idassert is enabled */
2542         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2543                 && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
2544                 && BER_BVISNULL( &si->si_bc.sb_saslmech ) )
2545         {
2546                 goto done;
2547         }
2548
2549         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2550                 goto done;
2551         }
2552
2553         if ( op->o_tag == LDAP_REQ_BIND ) {
2554                 ndn = op->o_req_ndn;
2555
2556         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2557                 ndn = op->o_conn->c_ndn;
2558
2559         } else {
2560                 ndn = op->o_ndn;
2561         }
2562
2563         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2564                 if ( op->o_proxy_authz ) {
2565                         /*
2566                          * FIXME: we do not want to perform proxyAuthz
2567                          * on behalf of the client, because this would
2568                          * be performed with "proxyauthzdn" privileges.
2569                          *
2570                          * This might actually be too strict, since
2571                          * the "proxyauthzdn" authzTo, and each entry's
2572                          * authzFrom attributes may be crafted
2573                          * to avoid unwanted proxyAuthz to take place.
2574                          */
2575 #if 0
2576                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2577                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2578 #endif
2579                         goto done;
2580                 }
2581
2582                 if ( !BER_BVISNULL( bound_ndn ) ) {
2583                         goto done;
2584                 }
2585
2586                 if ( BER_BVISNULL( &ndn ) ) {
2587                         goto done;
2588                 }
2589
2590                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2591                         goto done;
2592                 }
2593
2594         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2595                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2596                 {
2597                         /* already asserted in SASL via native authz */
2598                         goto done;
2599                 }
2600
2601         } else if ( si->si_authz && !isroot ) {
2602                 int             rc;
2603                 struct berval authcDN;
2604
2605                 if ( BER_BVISNULL( &ndn ) ) {
2606                         authcDN = slap_empty_bv;
2607                 } else {
2608                         authcDN = ndn;
2609                 }
2610                 rc = slap_sasl_matches( op, si->si_authz,
2611                                 &authcDN, &authcDN );
2612                 if ( rc != LDAP_SUCCESS ) {
2613                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2614                                 /* ndn is not authorized
2615                                  * to use idassert */
2616                                 rs->sr_err = rc;
2617                         }
2618                         goto done;
2619                 }
2620         }
2621
2622         if ( op->o_proxy_authz ) {
2623                 /*
2624                  * FIXME: we can:
2625                  * 1) ignore the already set proxyAuthz control
2626                  * 2) leave it in place, and don't set ours
2627                  * 3) add both
2628                  * 4) reject the operation
2629                  *
2630                  * option (4) is very drastic
2631                  * option (3) will make the remote server reject
2632                  * the operation, thus being equivalent to (4)
2633                  * option (2) will likely break the idassert
2634                  * assumptions, so we cannot accept it;
2635                  * option (1) means that we are contradicting
2636                  * the client's reques.
2637                  *
2638                  * I think (4) is the only correct choice.
2639                  */
2640                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2641                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2642         }
2643
2644         if ( op->o_is_auth_check ) {
2645                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2646
2647         } else {
2648                 mode = si->si_mode;
2649         }
2650
2651         switch ( mode ) {
2652         case LDAP_BACK_IDASSERT_LEGACY:
2653                 /* original behavior:
2654                  * assert the client's identity */
2655         case LDAP_BACK_IDASSERT_SELF:
2656                 assertedID = ndn;
2657                 break;
2658
2659         case LDAP_BACK_IDASSERT_ANONYMOUS:
2660                 /* assert "anonymous" */
2661                 assertedID = slap_empty_bv;
2662                 break;
2663
2664         case LDAP_BACK_IDASSERT_NOASSERT:
2665                 /* don't assert; bind as proxyauthzdn */
2666                 goto done;
2667
2668         case LDAP_BACK_IDASSERT_OTHERID:
2669         case LDAP_BACK_IDASSERT_OTHERDN:
2670                 /* assert idassert DN */
2671                 assertedID = si->si_bc.sb_authzId;
2672                 break;
2673
2674         default:
2675                 assert( 0 );
2676         }
2677
2678         /* if we got here, "" is allowed to proxyAuthz */
2679         if ( BER_BVISNULL( &assertedID ) ) {
2680                 assertedID = slap_empty_bv;
2681         }
2682
2683         /* don't idassert the bound DN (ITS#4497) */
2684         if ( dn_match( &assertedID, bound_ndn ) ) {
2685                 goto done;
2686         }
2687
2688         ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2689         ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL );
2690
2691         switch ( si->si_mode ) {
2692         /* already in u:ID or dn:DN form */
2693         case LDAP_BACK_IDASSERT_OTHERID:
2694         case LDAP_BACK_IDASSERT_OTHERDN:
2695                 ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx );
2696                 rs->sr_err = LDAP_SUCCESS;
2697                 break;
2698
2699         /* needs the dn: prefix */
2700         default:
2701                 ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2702                 ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1,
2703                                 op->o_tmpmemctx );
2704                 AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2705                 AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2706                                 assertedID.bv_val, assertedID.bv_len + 1 );
2707                 rs->sr_err = LDAP_SUCCESS;
2708                 break;
2709         }
2710
2711         /* Older versions of <draft-weltman-ldapv3-proxy> required
2712          * to encode the value of the authzID (and called it proxyDN);
2713          * this hack provides compatibility with those DSAs that
2714          * implement it this way */
2715         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2716                 struct berval           authzID = ctrl->ldctl_value;
2717                 BerElementBuffer        berbuf;
2718                 BerElement              *ber = (BerElement *)&berbuf;
2719                 ber_tag_t               tag;
2720
2721                 ber_init2( ber, 0, LBER_USE_DER );
2722                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2723
2724                 tag = ber_printf( ber, "O", &authzID );
2725                 if ( tag == LBER_ERROR ) {
2726                         rs->sr_err = LDAP_OTHER;
2727                         goto free_ber;
2728                 }
2729
2730                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2731                         rs->sr_err = LDAP_OTHER;
2732                         goto free_ber;
2733                 }
2734
2735                 rs->sr_err = LDAP_SUCCESS;
2736
2737 free_ber:;
2738                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2739                 ber_free_buf( ber );
2740
2741                 if ( rs->sr_err != LDAP_SUCCESS ) {
2742                         goto done;
2743                 }
2744
2745         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2746                 struct berval           authzID = ctrl->ldctl_value,
2747                                         tmp;
2748                 BerElementBuffer        berbuf;
2749                 BerElement              *ber = (BerElement *)&berbuf;
2750                 ber_tag_t               tag;
2751
2752                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2753                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2754                         goto done;
2755                 }
2756
2757                 tmp = authzID;
2758                 tmp.bv_val += STRLENOF( "dn:" );
2759                 tmp.bv_len -= STRLENOF( "dn:" );
2760
2761                 ber_init2( ber, 0, LBER_USE_DER );
2762                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2763
2764                 /* apparently, Mozilla API encodes this
2765                  * as "SEQUENCE { LDAPDN }" */
2766                 tag = ber_printf( ber, "{O}", &tmp );
2767                 if ( tag == LBER_ERROR ) {
2768                         rs->sr_err = LDAP_OTHER;
2769                         goto free_ber2;
2770                 }
2771
2772                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2773                         rs->sr_err = LDAP_OTHER;
2774                         goto free_ber2;
2775                 }
2776
2777                 ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2778                 rs->sr_err = LDAP_SUCCESS;
2779
2780 free_ber2:;
2781                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2782                 ber_free_buf( ber );
2783
2784                 if ( rs->sr_err != LDAP_SUCCESS ) {
2785                         goto done;
2786                 }
2787         }
2788
2789 done:;
2790
2791         return rs->sr_err;
2792 }
2793
2794 /*
2795  * Add controls;
2796  *
2797  * if any needs to be added, it is prepended to existing ones,
2798  * in a newly allocated array.  The companion function
2799  * ldap_back_controls_free() must be used to restore the original
2800  * status of op->o_ctrls.
2801  */
2802 int
2803 ldap_back_controls_add(
2804                 Operation       *op,
2805                 SlapReply       *rs,
2806                 ldapconn_t      *lc,
2807                 LDAPControl     ***pctrls )
2808 {
2809         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2810
2811         LDAPControl     **ctrls = NULL;
2812         /* set to the maximum number of controls this backend can add */
2813         LDAPControl     c[ 2 ] = { { 0 } };
2814         int             n = 0, i, j1 = 0, j2 = 0;
2815
2816         *pctrls = NULL;
2817
2818         rs->sr_err = LDAP_SUCCESS;
2819
2820         /* don't add controls if protocol is not LDAPv3 */
2821         switch ( li->li_version ) {
2822         case LDAP_VERSION3:
2823                 break;
2824
2825         case 0:
2826                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2827                         break;
2828                 }
2829                 /* fall thru */
2830
2831         default:
2832                 goto done;
2833         }
2834
2835         /* put controls that go __before__ existing ones here */
2836
2837         /* proxyAuthz for identity assertion */
2838         switch ( ldap_back_proxy_authz_ctrl( op, rs, &lc->lc_bound_ndn,
2839                 li->li_version, &li->li_idassert, &c[ j1 ] ) )
2840         {
2841         case SLAP_CB_CONTINUE:
2842                 break;
2843
2844         case LDAP_SUCCESS:
2845                 j1++;
2846                 break;
2847
2848         default:
2849                 goto done;
2850         }
2851
2852         /* put controls that go __after__ existing ones here */
2853
2854 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
2855         /* FIXME: according to <draft-wahl-ldap-session>,
2856          * the server should check if the control can be added
2857          * based on the identity of the client and so */
2858
2859         /* session tracking */
2860         if ( LDAP_BACK_ST_REQUEST( li ) ) {
2861                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
2862                 case SLAP_CB_CONTINUE:
2863                         break;
2864
2865                 case LDAP_SUCCESS:
2866                         j2++;
2867                         break;
2868
2869                 default:
2870                         goto done;
2871                 }
2872         }
2873 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
2874
2875         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
2876                 rs->sr_err = LDAP_SUCCESS;
2877         }
2878
2879         /* if nothing to do, just bail out */
2880         if ( j1 == 0 && j2 == 0 ) {
2881                 goto done;
2882         }
2883
2884         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
2885
2886         if ( op->o_ctrls ) {
2887                 for ( n = 0; op->o_ctrls[ n ]; n++ )
2888                         /* just count ctrls */ ;
2889         }
2890
2891         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
2892                         op->o_tmpmemctx );
2893         if ( j1 ) {
2894                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
2895                 *ctrls[ 0 ] = c[ 0 ];
2896                 for ( i = 1; i < j1; i++ ) {
2897                         ctrls[ i ] = &ctrls[ 0 ][ i ];
2898                         *ctrls[ i ] = c[ i ];
2899                 }
2900         }
2901
2902         i = 0;
2903         if ( op->o_ctrls ) {
2904                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2905                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
2906                 }
2907         }
2908
2909         n += j1;
2910         if ( j2 ) {
2911                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
2912                 *ctrls[ n ] = c[ j1 ];
2913                 for ( i = 1; i < j2; i++ ) {
2914                         ctrls[ n + i ] = &ctrls[ n ][ i ];
2915                         *ctrls[ n + i ] = c[ i ];
2916                 }
2917         }
2918
2919         ctrls[ n + j2 ] = NULL;
2920
2921 done:;
2922         if ( ctrls == NULL ) {
2923                 ctrls = op->o_ctrls;
2924         }
2925
2926         *pctrls = ctrls;
2927
2928         return rs->sr_err;
2929 }
2930
2931 int
2932 ldap_back_controls_free( Operation *op, SlapReply *rs, LDAPControl ***pctrls )
2933 {
2934         LDAPControl     **ctrls = *pctrls;
2935
2936         /* we assume that the controls added by the proxy come first,
2937          * so as soon as we find op->o_ctrls[ 0 ] we can stop */
2938         if ( ctrls && ctrls != op->o_ctrls ) {
2939                 int             i = 0, n = 0, n_added;
2940                 LDAPControl     *lower, *upper;
2941
2942                 assert( ctrls[ 0 ] != NULL );
2943
2944                 for ( n = 0; ctrls[ n ] != NULL; n++ )
2945                         /* count 'em */ ;
2946
2947                 if ( op->o_ctrls ) {
2948                         for ( i = 0; op->o_ctrls[ i ] != NULL; i++ )
2949                                 /* count 'em */ ;
2950                 }
2951
2952                 n_added = n - i;
2953                 lower = (LDAPControl *)&ctrls[ n ];
2954                 upper = &lower[ n_added ];
2955
2956                 for ( i = 0; ctrls[ i ] != NULL; i++ ) {
2957                         if ( ctrls[ i ] < lower || ctrls[ i ] >= upper ) {
2958                                 /* original; don't touch */
2959                                 continue;
2960                         }
2961
2962                         if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
2963                                 op->o_tmpfree( ctrls[ i ]->ldctl_value.bv_val, op->o_tmpmemctx );
2964                         }
2965                 }
2966
2967                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2968         }
2969
2970         *pctrls = NULL;
2971
2972         return 0;
2973 }
2974
2975 int
2976 ldap_back_conn2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
2977 {
2978         char tbuf[ SLAP_TEXT_BUFLEN ];
2979         char *ptr = buf, *end = buf + buflen;
2980         int len;
2981
2982         if ( ptr + sizeof("conn=") > end ) return -1;
2983         ptr = lutil_strcopy( ptr, "conn=" );
2984
2985         len = ldap_back_connid2str( lc, ptr, (ber_len_t)(end - ptr) );
2986         ptr += len;
2987         if ( ptr >= end ) return -1;
2988
2989         if ( !BER_BVISNULL( &lc->lcb_local_ndn ) ) {
2990                 if ( ptr + sizeof(" DN=\"\"") + lc->lcb_local_ndn.bv_len > end ) return -1;
2991                 ptr = lutil_strcopy( ptr, " DN=\"" );
2992                 ptr = lutil_strncopy( ptr, lc->lcb_local_ndn.bv_val, lc->lcb_local_ndn.bv_len );
2993                 *ptr++ = '"';
2994         }
2995
2996         if ( lc->lcb_create_time != 0 ) {
2997                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_create_time );
2998                 if ( ptr + sizeof(" created=") + len >= end ) return -1;
2999                 ptr = lutil_strcopy( ptr, " created=" );
3000                 ptr = lutil_strcopy( ptr, tbuf );
3001         }
3002
3003         if ( lc->lcb_time != 0 ) {
3004                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_time );
3005                 if ( ptr + sizeof(" modified=") + len >= end ) return -1;
3006                 ptr = lutil_strcopy( ptr, " modified=" );
3007                 ptr = lutil_strcopy( ptr, tbuf );
3008         }
3009
3010         len = snprintf( tbuf, sizeof(tbuf), "%u", lc->lcb_refcnt );
3011         if ( ptr + sizeof(" refcnt=") + len >= end ) return -1;
3012         ptr = lutil_strcopy( ptr, " refcnt=" );
3013         ptr = lutil_strcopy( ptr, tbuf );
3014
3015         return ptr - buf;
3016 }
3017
3018 int
3019 ldap_back_connid2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
3020 {
3021         static struct berval conns[] = {
3022                 BER_BVC("ROOTDN"),
3023                 BER_BVC("ROOTDN-TLS"),
3024                 BER_BVC("ANON"),
3025                 BER_BVC("ANON-TLS"),
3026                 BER_BVC("BIND"),
3027                 BER_BVC("BIND-TLS"),
3028                 BER_BVNULL
3029         };
3030
3031         int len = 0;
3032
3033         if ( LDAP_BACK_PCONN_ISPRIV( (const ldapconn_t *)lc ) ) {
3034                 long cid;
3035                 struct berval *bv;
3036
3037                 cid = (long)lc->lcb_conn;
3038                 assert( cid >= LDAP_BACK_PCONN_FIRST && cid < LDAP_BACK_PCONN_LAST );
3039
3040                 bv = &conns[ cid ];
3041
3042                 if ( bv->bv_len >= buflen ) {
3043                         return bv->bv_len + 1;
3044                 }
3045
3046                 len = bv->bv_len;
3047                 lutil_strncopy( buf, bv->bv_val, bv->bv_len + 1 );
3048
3049         } else {
3050                 len = snprintf( buf, buflen, "%lu", lc->lcb_conn->c_connid );
3051         }
3052
3053         return len;
3054 }