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 1999-2013 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                 lc->lc_connid = li->li_conn_nextid++;
1070
1071                 assert( lc->lc_refcnt == 1 );
1072
1073 #if LDAP_BACK_PRINT_CONNTREE > 0
1074                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
1075 #endif /* LDAP_BACK_PRINT_CONNTREE */
1076
1077                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1078                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
1079                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
1080                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
1081                                 LDAP_BACK_CONN_CACHED_SET( lc );
1082
1083                         } else {
1084                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1085                         }
1086                         rs->sr_err = 0;
1087
1088                 } else {
1089                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
1090                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
1091                         LDAP_BACK_CONN_CACHED_SET( lc );
1092                 }
1093
1094 #if LDAP_BACK_PRINT_CONNTREE > 0
1095                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
1096 #endif /* LDAP_BACK_PRINT_CONNTREE */
1097
1098                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1099
1100                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1101                         char    buf[ SLAP_TEXT_BUFLEN ];
1102
1103                         snprintf( buf, sizeof( buf ),
1104                                 "lc=%p inserted refcnt=%u rc=%d",
1105                                 (void *)lc, refcnt, rs->sr_err );
1106
1107                         Debug( LDAP_DEBUG_TRACE,
1108                                 "=>ldap_back_getconn: %s: %s\n",
1109                                 op->o_log_prefix, buf, 0 );
1110                 }
1111
1112                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1113                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1114                         switch ( rs->sr_err ) {
1115                         case 0:
1116                                 break;
1117
1118                         case -1:
1119                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1120                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1121                                         /* duplicate: free and try to get the newly created one */
1122                                         ldap_back_conn_free( lc );
1123                                         lc = NULL;
1124                                         goto retry_lock;
1125                                 }
1126
1127                                 /* taint connection, so that it'll be freed when released */
1128                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1129                                 break;
1130
1131                         default:
1132                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1133                                 ldap_back_conn_free( lc );
1134                                 rs->sr_err = LDAP_OTHER;
1135                                 rs->sr_text = "Proxy bind collision";
1136                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1137                                         send_ldap_result( op, rs );
1138                                 }
1139                                 return NULL;
1140                         }
1141                 }
1142
1143         } else {
1144                 int     expiring = 0;
1145
1146                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1147                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1148                 {
1149                         expiring = 1;
1150
1151                         /* let it be used, but taint/delete it so that
1152                          * no-one else can look it up any further */
1153                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1154
1155 #if LDAP_BACK_PRINT_CONNTREE > 0
1156                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1157 #endif /* LDAP_BACK_PRINT_CONNTREE */
1158
1159                         (void)ldap_back_conn_delete( li, lc );
1160                         LDAP_BACK_CONN_TAINTED_SET( lc );
1161
1162 #if LDAP_BACK_PRINT_CONNTREE > 0
1163                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1164 #endif /* LDAP_BACK_PRINT_CONNTREE */
1165
1166                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1167                 }
1168
1169                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1170                         char    buf[ SLAP_TEXT_BUFLEN ];
1171
1172                         snprintf( buf, sizeof( buf ),
1173                                 "conn %p fetched refcnt=%u%s",
1174                                 (void *)lc, refcnt,
1175                                 expiring ? " expiring" : "" );
1176                         Debug( LDAP_DEBUG_TRACE,
1177                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1178                 }
1179         }
1180
1181 #ifdef HAVE_TLS
1182 done:;
1183 #endif /* HAVE_TLS */
1184
1185         return lc;
1186 }
1187
1188 void
1189 ldap_back_release_conn_lock(
1190         ldapinfo_t              *li,
1191         ldapconn_t              **lcp,
1192         int                     dolock )
1193 {
1194
1195         ldapconn_t      *lc = *lcp;
1196
1197         if ( dolock ) {
1198                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1199         }
1200         assert( lc->lc_refcnt > 0 );
1201         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1202         lc->lc_refcnt--;
1203         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1204                 ldap_back_freeconn( li, lc, 0 );
1205                 *lcp = NULL;
1206         }
1207         if ( dolock ) {
1208                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1209         }
1210 }
1211
1212 void
1213 ldap_back_quarantine(
1214         Operation       *op,
1215         SlapReply       *rs )
1216 {
1217         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1218
1219         slap_retry_info_t       *ri = &li->li_quarantine;
1220
1221         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1222
1223         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1224                 time_t          new_last = slap_get_time();
1225
1226                 switch ( li->li_isquarantined ) {
1227                 case LDAP_BACK_FQ_NO:
1228                         if ( ri->ri_last == new_last ) {
1229                                 goto done;
1230                         }
1231
1232                         Debug( LDAP_DEBUG_ANY,
1233                                 "%s: ldap_back_quarantine enter.\n",
1234                                 op->o_log_prefix, 0, 0 );
1235
1236                         ri->ri_idx = 0;
1237                         ri->ri_count = 0;
1238                         break;
1239
1240                 case LDAP_BACK_FQ_RETRYING:
1241                         Debug( LDAP_DEBUG_ANY,
1242                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1243                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1244
1245                         ++ri->ri_count;
1246                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1247                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1248                         {
1249                                 ri->ri_count = 0;
1250                                 ++ri->ri_idx;
1251                         }
1252                         break;
1253
1254                 default:
1255                         break;
1256                 }
1257
1258                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1259                 ri->ri_last = new_last;
1260
1261         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1262                 if ( ri->ri_last == slap_get_time() ) {
1263                         goto done;
1264                 }
1265
1266                 Debug( LDAP_DEBUG_ANY,
1267                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1268                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1269
1270                 if ( li->li_quarantine_f ) {
1271                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1272                 }
1273
1274                 ri->ri_count = 0;
1275                 ri->ri_idx = 0;
1276                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1277         }
1278
1279 done:;
1280         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1281 }
1282
1283 static int
1284 ldap_back_dobind_cb(
1285         Operation *op,
1286         SlapReply *rs
1287 )
1288 {
1289         ber_tag_t *tptr = op->o_callback->sc_private;
1290         op->o_tag = *tptr;
1291         rs->sr_tag = slap_req2res( op->o_tag );
1292
1293         return SLAP_CB_CONTINUE;
1294 }
1295
1296 /*
1297  * ldap_back_dobind_int
1298  *
1299  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1300  */
1301 static int
1302 ldap_back_dobind_int(
1303         ldapconn_t              **lcp,
1304         Operation               *op,
1305         SlapReply               *rs,
1306         ldap_back_send_t        sendok,
1307         int                     retries,
1308         int                     dolock )
1309 {
1310         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1311
1312         ldapconn_t      *lc;
1313         struct berval   binddn = slap_empty_bv,
1314                         bindcred = slap_empty_bv;
1315
1316         int             rc = 0,
1317                         isbound,
1318                         binding = 0;
1319         ber_int_t       msgid;
1320         ber_tag_t       o_tag = op->o_tag;
1321         slap_callback cb = {0};
1322         char            *tmp_dn;
1323
1324         assert( lcp != NULL );
1325         assert( retries >= 0 );
1326
1327         if ( sendok & LDAP_BACK_GETCONN ) {
1328                 assert( *lcp == NULL );
1329
1330                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1331                 if ( lc == NULL ) {
1332                         return 0;
1333                 }
1334                 *lcp = lc;
1335
1336         } else {
1337                 lc = *lcp;
1338         }
1339
1340         assert( lc != NULL );
1341
1342 retry_lock:;
1343         if ( dolock ) {
1344                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1345         }
1346
1347         if ( binding == 0 ) {
1348                 /* check if already bound */
1349                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1350                 if ( isbound ) {
1351                         if ( dolock ) {
1352                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1353                         }
1354                         return rc;
1355                 }
1356
1357                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1358                         /* if someone else is about to bind it, give up and retry */
1359                         if ( dolock ) {
1360                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1361                         }
1362                         ldap_pvt_thread_yield();
1363                         goto retry_lock;
1364
1365                 } else {
1366                         /* otherwise this thread will bind it */
1367                         LDAP_BACK_CONN_BINDING_SET( lc );
1368                         binding = 1;
1369                 }
1370         }
1371
1372         if ( dolock ) {
1373                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1374         }
1375
1376         /*
1377          * FIXME: we need to let clients use proxyAuthz
1378          * otherwise we cannot do symmetric pools of servers;
1379          * we have to live with the fact that a user can
1380          * authorize itself as any ID that is allowed
1381          * by the authzTo directive of the "proxyauthzdn".
1382          */
1383         /*
1384          * NOTE: current Proxy Authorization specification
1385          * and implementation do not allow proxy authorization
1386          * control to be provided with Bind requests
1387          */
1388         /*
1389          * if no bind took place yet, but the connection is bound
1390          * and the "idassert-authcDN" (or other ID) is set,
1391          * then bind as the asserting identity and explicitly
1392          * add the proxyAuthz control to every operation with the
1393          * dn bound to the connection as control value.
1394          * This is done also if this is the authorizing backend,
1395          * but the "override" flag is given to idassert.
1396          * It allows to use SASL bind and yet proxyAuthz users
1397          */
1398         op->o_tag = LDAP_REQ_BIND;
1399         cb.sc_next = op->o_callback;
1400         cb.sc_private = &o_tag;
1401         cb.sc_response = ldap_back_dobind_cb;
1402         op->o_callback = &cb;
1403
1404         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1405                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1406                         /* if we got here, it shouldn't return result */
1407                         rc = ldap_back_is_proxy_authz( op, rs,
1408                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1409                         if ( rc != 1 ) {
1410                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_back_is_proxy_authz "
1411                                         "returned %d, misconfigured URI?\n", rc, 0, 0 );
1412                                 rs->sr_err = LDAP_OTHER;
1413                                 rs->sr_text = "misconfigured URI?";
1414                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1415                                 if ( sendok & LDAP_BACK_SENDERR ) {
1416                                         send_ldap_result( op, rs );
1417                                 }
1418                                 goto done;
1419                         }
1420                 }
1421                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1422                 goto done;
1423         }
1424
1425 #ifdef HAVE_CYRUS_SASL
1426         if ( LDAP_BACK_CONN_ISPRIV( lc )) {
1427         slap_bindconf *sb;
1428         if ( li->li_acl_authmethod != LDAP_AUTH_NONE )
1429                 sb = &li->li_acl;
1430         else
1431                 sb = &li->li_idassert.si_bc;
1432
1433         if ( sb->sb_method == LDAP_AUTH_SASL ) {
1434                 void            *defaults = NULL;
1435
1436                 if ( sb->sb_secprops != NULL ) {
1437                         rc = ldap_set_option( lc->lc_ld,
1438                                 LDAP_OPT_X_SASL_SECPROPS, sb->sb_secprops );
1439
1440                         if ( rc != LDAP_OPT_SUCCESS ) {
1441                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1442                                         "(SECPROPS,\"%s\") failed!\n",
1443                                         sb->sb_secprops, 0, 0 );
1444                                 goto done;
1445                         }
1446                 }
1447
1448                 defaults = lutil_sasl_defaults( lc->lc_ld,
1449                                 sb->sb_saslmech.bv_val,
1450                                 sb->sb_realm.bv_val,
1451                                 sb->sb_authcId.bv_val,
1452                                 sb->sb_cred.bv_val,
1453                                 NULL );
1454                 if ( defaults == NULL ) {
1455                         rs->sr_err = LDAP_OTHER;
1456                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1457                         if ( sendok & LDAP_BACK_SENDERR ) {
1458                                 send_ldap_result( op, rs );
1459                         }
1460                         goto done;
1461                 }
1462
1463                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1464                                 sb->sb_binddn.bv_val,
1465                                 sb->sb_saslmech.bv_val, NULL, NULL,
1466                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1467                                 defaults );
1468
1469                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1470                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1471                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1472
1473                 lutil_sasl_freedefs( defaults );
1474
1475                 switch ( rs->sr_err ) {
1476                 case LDAP_SUCCESS:
1477                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1478                         break;
1479
1480                 case LDAP_LOCAL_ERROR:
1481                         /* list client API error codes that require
1482                          * to taint the connection */
1483                         /* FIXME: should actually retry? */
1484                         LDAP_BACK_CONN_TAINTED_SET( lc );
1485
1486                         /* fallthru */
1487
1488                 default:
1489                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1490                         rs->sr_err = slap_map_api2result( rs );
1491                         if ( sendok & LDAP_BACK_SENDERR ) {
1492                                 send_ldap_result( op, rs );
1493                         }
1494                         break;
1495                 }
1496
1497                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1498                         ldap_back_quarantine( op, rs );
1499                 }
1500
1501                 goto done;
1502         }
1503         }
1504 #endif /* HAVE_CYRUS_SASL */
1505
1506 retry:;
1507         if ( BER_BVISNULL( &lc->lc_cred ) ) {
1508                 tmp_dn = "";
1509                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) && !BER_BVISEMPTY( &lc->lc_bound_ndn ) ) {
1510                         Debug( LDAP_DEBUG_ANY, "%s ldap_back_dobind_int: DN=\"%s\" without creds, binding anonymously",
1511                                 op->o_log_prefix, lc->lc_bound_ndn.bv_val, 0 );
1512                 }
1513
1514         } else {
1515                 tmp_dn = lc->lc_bound_ndn.bv_val;
1516         }
1517         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1518                         tmp_dn,
1519                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1520                         NULL, NULL, &msgid );
1521
1522         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1523         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1524         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1525
1526         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1527                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1528                         if ( dolock ) {
1529                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1530                         }
1531
1532                         assert( lc->lc_refcnt > 0 );
1533                         if ( lc->lc_refcnt == 1 ) {
1534                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1535                                 lc->lc_ld = NULL;
1536
1537                                 /* lc here must be the regular lc, reset and ready for init */
1538                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1539                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1540                                         sendok &= ~LDAP_BACK_SENDERR;
1541                                         lc->lc_refcnt = 0;
1542                                 }
1543                         }
1544
1545                         if ( dolock ) {
1546                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1547                         }
1548
1549                         if ( rs->sr_err == LDAP_SUCCESS ) {
1550                                 if ( retries > 0 ) {
1551                                         retries--;
1552                                 }
1553                                 goto retry;
1554                         }
1555                 }
1556
1557                 assert( lc->lc_refcnt == 1 );
1558                 lc->lc_refcnt = 0;
1559                 ldap_back_freeconn( li, lc, dolock );
1560                 *lcp = NULL;
1561                 rs->sr_err = slap_map_api2result( rs );
1562
1563                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1564                         ldap_back_quarantine( op, rs );
1565                 }
1566
1567                 if ( rs->sr_err != LDAP_SUCCESS &&
1568                         ( sendok & LDAP_BACK_SENDERR ) )
1569                 {
1570                         if ( op->o_callback == &cb )
1571                                 op->o_callback = cb.sc_next;
1572                         op->o_tag = o_tag;
1573                         rs->sr_text = "Proxy can't contact remote server";
1574                         send_ldap_result( op, rs );
1575                 }
1576
1577                 rc = 0;
1578                 goto func_leave;
1579         }
1580
1581         rc = ldap_back_op_result( lc, op, rs, msgid,
1582                 -1, ( sendok | LDAP_BACK_BINDING ) );
1583         if ( rc == LDAP_SUCCESS ) {
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         if ( !( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE )) {
2119                 if ( op->o_tag == LDAP_REQ_BIND ) {
2120                         if ( !BER_BVISEMPTY( &ndn )) {
2121                                 dobind = 0;
2122                                 goto done;
2123                         }
2124                 } else if ( SLAP_IS_AUTHZ_BACKEND( op )) {
2125                         dobind = 0;
2126                         goto done;
2127                 }
2128         }
2129
2130         switch ( li->li_idassert_mode ) {
2131         case LDAP_BACK_IDASSERT_LEGACY:
2132                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
2133                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
2134                         {
2135                                 *binddn = li->li_idassert_authcDN;
2136                                 *bindcred = li->li_idassert_passwd;
2137                                 dobind = 1;
2138                         }
2139                 }
2140                 break;
2141
2142         default:
2143                 /* NOTE: rootdn can always idassert */
2144                 if ( BER_BVISNULL( &ndn )
2145                         && li->li_idassert_authz == NULL
2146                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
2147                 {
2148                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2149                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
2150                                 if ( sendok & LDAP_BACK_SENDERR ) {
2151                                         send_ldap_result( op, rs );
2152                                         dobind = -1;
2153                                 }
2154
2155                         } else {
2156                                 rs->sr_err = LDAP_SUCCESS;
2157                                 *binddn = slap_empty_bv;
2158                                 *bindcred = slap_empty_bv;
2159                                 break;
2160                         }
2161
2162                         goto done;
2163
2164                 } else if ( !be_isroot( op ) ) {
2165                         if ( li->li_idassert_passthru ) {
2166                                 struct berval authcDN;
2167
2168                                 if ( BER_BVISNULL( &ndn ) ) {
2169                                         authcDN = slap_empty_bv;
2170
2171                                 } else {
2172                                         authcDN = ndn;
2173                                 }
2174                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_passthru,
2175                                                 &authcDN, &authcDN );
2176                                 if ( rs->sr_err == LDAP_SUCCESS ) {
2177                                         dobind = 0;
2178                                         break;
2179                                 }
2180                         }
2181
2182                         if ( li->li_idassert_authz ) {
2183                                 struct berval authcDN;
2184
2185                                 if ( BER_BVISNULL( &ndn ) ) {
2186                                         authcDN = slap_empty_bv;
2187
2188                                 } else {
2189                                         authcDN = ndn;
2190                                 }
2191                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
2192                                                 &authcDN, &authcDN );
2193                                 if ( rs->sr_err != LDAP_SUCCESS ) {
2194                                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2195                                                 if ( sendok & LDAP_BACK_SENDERR ) {
2196                                                         send_ldap_result( op, rs );
2197                                                         dobind = -1;
2198                                                 }
2199
2200                                         } else {
2201                                                 rs->sr_err = LDAP_SUCCESS;
2202                                                 *binddn = slap_empty_bv;
2203                                                 *bindcred = slap_empty_bv;
2204                                                 break;
2205                                         }
2206
2207                                         goto done;
2208                                 }
2209                         }
2210                 }
2211
2212                 *binddn = li->li_idassert_authcDN;
2213                 *bindcred = li->li_idassert_passwd;
2214                 dobind = 1;
2215                 break;
2216         }
2217
2218 done:;
2219         return dobind;
2220 }
2221
2222 static int
2223 ldap_back_proxy_authz_bind(
2224         ldapconn_t              *lc,
2225         Operation               *op,
2226         SlapReply               *rs,
2227         ldap_back_send_t        sendok,
2228         struct berval           *binddn,
2229         struct berval           *bindcred )
2230 {
2231         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2232         struct berval   ndn;
2233         int             msgid;
2234         int             rc;
2235
2236         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2237                 ndn = op->o_conn->c_ndn;
2238
2239         } else {
2240                 ndn = op->o_ndn;
2241         }
2242
2243         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
2244 #ifdef HAVE_CYRUS_SASL
2245                 void            *defaults = NULL;
2246                 struct berval   authzID = BER_BVNULL;
2247                 int             freeauthz = 0;
2248                 LDAPControl **ctrlsp = NULL;
2249                 LDAPMessage *result = NULL;
2250                 const char *rmech = NULL;
2251                 const char *save_text = rs->sr_text;
2252
2253 #ifdef SLAP_AUTH_DN
2254                 LDAPControl ctrl, *ctrls[2];
2255                 int msgid;
2256 #endif /* SLAP_AUTH_DN */
2257
2258                 /* if SASL supports native authz, prepare for it */
2259                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
2260                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2261                 {
2262                         switch ( li->li_idassert_mode ) {
2263                         case LDAP_BACK_IDASSERT_OTHERID:
2264                         case LDAP_BACK_IDASSERT_OTHERDN:
2265                                 authzID = li->li_idassert_authzID;
2266                                 break;
2267
2268                         case LDAP_BACK_IDASSERT_ANONYMOUS:
2269                                 BER_BVSTR( &authzID, "dn:" );
2270                                 break;
2271
2272                         case LDAP_BACK_IDASSERT_SELF:
2273                                 if ( BER_BVISNULL( &ndn ) ) {
2274                                         /* connection is not authc'd, so don't idassert */
2275                                         BER_BVSTR( &authzID, "dn:" );
2276                                         break;
2277                                 }
2278                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
2279                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
2280                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
2281                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
2282                                                 ndn.bv_val, ndn.bv_len + 1 );
2283                                 freeauthz = 1;
2284                                 break;
2285
2286                         default:
2287                                 break;
2288                         }
2289                 }
2290
2291                 if ( li->li_idassert_secprops != NULL ) {
2292                         rs->sr_err = ldap_set_option( lc->lc_ld,
2293                                 LDAP_OPT_X_SASL_SECPROPS,
2294                                 (void *)li->li_idassert_secprops );
2295
2296                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
2297                                 rs->sr_err = LDAP_OTHER;
2298                                 if ( sendok & LDAP_BACK_SENDERR ) {
2299                                         send_ldap_result( op, rs );
2300                                 }
2301                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2302                                 goto done;
2303                         }
2304                 }
2305
2306                 defaults = lutil_sasl_defaults( lc->lc_ld,
2307                                 li->li_idassert_sasl_mech.bv_val,
2308                                 li->li_idassert_sasl_realm.bv_val,
2309                                 li->li_idassert_authcID.bv_val,
2310                                 li->li_idassert_passwd.bv_val,
2311                                 authzID.bv_val );
2312                 if ( defaults == NULL ) {
2313                         rs->sr_err = LDAP_OTHER;
2314                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2315                         if ( sendok & LDAP_BACK_SENDERR ) {
2316                                 send_ldap_result( op, rs );
2317                         }
2318                         goto done;
2319                 }
2320
2321 #ifdef SLAP_AUTH_DN
2322                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2323                         assert( BER_BVISNULL( binddn ) );
2324
2325                         ctrl.ldctl_oid = LDAP_CONTROL_AUTHZID_REQUEST;
2326                         ctrl.ldctl_iscritical = 0;
2327                         BER_BVZERO( &ctrl.ldctl_value );
2328                         ctrls[0] = &ctrl;
2329                         ctrls[1] = NULL;
2330                         ctrlsp = ctrls;
2331                 }
2332 #endif /* SLAP_AUTH_DN */
2333
2334                 do {
2335                         rs->sr_err = ldap_sasl_interactive_bind( lc->lc_ld, binddn->bv_val,
2336                                 li->li_idassert_sasl_mech.bv_val,
2337                                 ctrlsp, NULL, LDAP_SASL_QUIET, lutil_sasl_interact, defaults,
2338                                 result, &rmech, &msgid );
2339
2340                         if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS )
2341                                 break;
2342
2343                         ldap_msgfree( result );
2344
2345                         if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) {
2346                                 ldap_get_option( lc->lc_ld, LDAP_OPT_RESULT_CODE, (void*)&rs->sr_err );
2347                                 ldap_get_option( lc->lc_ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&rs->sr_text );
2348                                 break;
2349                         }
2350                 } while ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
2351
2352                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2353                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2354                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2355
2356                 switch ( rs->sr_err ) {
2357                 case LDAP_SUCCESS:
2358 #ifdef SLAP_AUTH_DN
2359                         /* FIXME: right now, the only reason to check
2360                          * response controls is RFC 3829 authzid */
2361                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2362                                 ctrlsp = NULL;
2363                                 rc = ldap_parse_result( lc->lc_ld, result, NULL, NULL, NULL, NULL,
2364                                         &ctrlsp, 0 );
2365                                 if ( rc == LDAP_SUCCESS && ctrlsp ) {
2366                                         LDAPControl *ctrl;
2367
2368                                         ctrl = ldap_control_find( LDAP_CONTROL_AUTHZID_RESPONSE,
2369                                                 ctrlsp, NULL );
2370                                         if ( ctrl ) {
2371                                                 Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (authzid)\n",
2372                                                         op->o_log_prefix, ctrl->ldctl_value.bv_val, 0 );
2373                                                 if ( ctrl->ldctl_value.bv_len > STRLENOF("dn:") &&
2374                                                         strncasecmp( ctrl->ldctl_value.bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2375                                                 {
2376                                                         struct berval bv;
2377                                                         bv.bv_val = &ctrl->ldctl_value.bv_val[STRLENOF("dn:")];
2378                                                         bv.bv_len = ctrl->ldctl_value.bv_len - STRLENOF("dn:");
2379                                                         ber_bvreplace( &lc->lc_bound_ndn, &bv );
2380                                                 }
2381                                         }
2382                                 }
2383
2384                                 ldap_controls_free( ctrlsp );
2385
2386                         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_WHOAMI ) {
2387                                 struct berval *val = NULL;
2388                                 rc = ldap_whoami_s( lc->lc_ld, &val, NULL, NULL );
2389                                 if ( rc == LDAP_SUCCESS && val != NULL ) {
2390                                         Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (whoami)\n",
2391                                                 op->o_log_prefix, val->bv_val, 0 );
2392                                         if ( val->bv_len > STRLENOF("dn:") &&
2393                                                 strncasecmp( val->bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2394                                         {
2395                                                 struct berval bv;
2396                                                 bv.bv_val = &val->bv_val[STRLENOF("dn:")];
2397                                                 bv.bv_len = val->bv_len - STRLENOF("dn:");
2398                                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2399                                         }
2400                                         ber_bvfree( val );
2401                                 }
2402                         }
2403
2404                         if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_MASK ) &&
2405                                 BER_BVISNULL( &lc->lc_bound_ndn ) )
2406                         {
2407                                 /* all in all, we only need it to be non-null */
2408                                 /* FIXME: should this be configurable? */
2409                                 static struct berval bv = BER_BVC("cn=authzdn");
2410                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2411                         }
2412 #endif /* SLAP_AUTH_DN */
2413                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2414                         break;
2415
2416                 case LDAP_LOCAL_ERROR:
2417                         /* list client API error codes that require
2418                          * to taint the connection */
2419                         /* FIXME: should actually retry? */
2420                         LDAP_BACK_CONN_TAINTED_SET( lc );
2421
2422                         /* fallthru */
2423
2424                 default:
2425                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2426                         rs->sr_err = slap_map_api2result( rs );
2427                         if ( sendok & LDAP_BACK_SENDERR ) {
2428                                 send_ldap_result( op, rs );
2429                         }
2430                         break;
2431                 }
2432
2433                 if ( save_text != rs->sr_text ) {
2434                         ldap_memfree( (char *)rs->sr_text );
2435                         rs->sr_text = save_text;
2436                 }
2437
2438                 ldap_msgfree( result );
2439
2440                 lutil_sasl_freedefs( defaults );
2441                 if ( freeauthz ) {
2442                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2443                 }
2444
2445                 goto done;
2446 #endif /* HAVE_CYRUS_SASL */
2447         }
2448
2449         switch ( li->li_idassert_authmethod ) {
2450         case LDAP_AUTH_NONE:
2451                 /* FIXME: do we really need this? */
2452                 BER_BVSTR( binddn, "" );
2453                 BER_BVSTR( bindcred, "" );
2454                 /* fallthru */
2455
2456         case LDAP_AUTH_SIMPLE:
2457                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2458                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2459                                 bindcred, NULL, NULL, &msgid );
2460                 rc = ldap_back_op_result( lc, op, rs, msgid,
2461                         -1, ( sendok | LDAP_BACK_BINDING ) );
2462
2463                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2464                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2465                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2466                 break;
2467
2468         default:
2469                 /* unsupported! */
2470                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2471                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2472                 if ( sendok & LDAP_BACK_SENDERR ) {
2473                         send_ldap_result( op, rs );
2474                 }
2475                 goto done;
2476         }
2477
2478         if ( rc == LDAP_SUCCESS ) {
2479                 /* set rebind stuff in case of successful proxyAuthz bind,
2480                  * so that referral chasing is attempted using the right
2481                  * identity */
2482                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2483                 if ( !BER_BVISNULL( binddn ) ) {
2484                         ber_bvreplace( &lc->lc_bound_ndn, binddn );
2485                 }
2486
2487                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2488                         memset( lc->lc_cred.bv_val, 0,
2489                                         lc->lc_cred.bv_len );
2490                 }
2491
2492                 if ( LDAP_BACK_SAVECRED( li ) ) {
2493                         if ( !BER_BVISNULL( bindcred ) ) {
2494                                 ber_bvreplace( &lc->lc_cred, bindcred );
2495                                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2496                         }
2497
2498                 } else {
2499                         lc->lc_cred.bv_len = 0;
2500                 }
2501         }
2502
2503 done:;
2504         return LDAP_BACK_CONN_ISBOUND( lc );
2505 }
2506
2507 /*
2508  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2509  * to existing server-side controls if required; if not,
2510  * the existing server-side controls are placed in *pctrls.
2511  * The caller, after using the controls in client API
2512  * operations, if ( *pctrls != op->o_ctrls ), should
2513  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2514  * The function returns success if the control could
2515  * be added if required, or if it did nothing; in the future,
2516  * it might return some error if it failed.
2517  *
2518  * if no bind took place yet, but the connection is bound
2519  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2520  * and explicitly add proxyAuthz the control to every operation
2521  * with the dn bound to the connection as control value.
2522  *
2523  * If no server-side controls are defined for the operation,
2524  * simply add the proxyAuthz control; otherwise, if the
2525  * proxyAuthz control is not already set, add it as
2526  * the first one
2527  *
2528  * FIXME: is controls order significant for security?
2529  * ANSWER: controls ordering and interoperability
2530  * must be indicated by the specs of each control; if none
2531  * is specified, the order is irrelevant.
2532  */
2533 int
2534 ldap_back_proxy_authz_ctrl(
2535                 Operation       *op,
2536                 SlapReply       *rs,
2537                 struct berval   *bound_ndn,
2538                 int             version,
2539                 slap_idassert_t *si,
2540                 LDAPControl     *ctrl )
2541 {
2542         slap_idassert_mode_t    mode;
2543         struct berval           assertedID,
2544                                 ndn;
2545         int                     isroot = 0;
2546
2547         rs->sr_err = SLAP_CB_CONTINUE;
2548
2549         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2550          * but if it is not set this test fails.  We need a different
2551          * means to detect if idassert is enabled */
2552         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2553                 && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
2554                 && BER_BVISNULL( &si->si_bc.sb_saslmech ) )
2555         {
2556                 goto done;
2557         }
2558
2559         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2560                 goto done;
2561         }
2562
2563         if ( op->o_tag == LDAP_REQ_BIND ) {
2564                 ndn = op->o_req_ndn;
2565
2566         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2567                 ndn = op->o_conn->c_ndn;
2568
2569         } else {
2570                 ndn = op->o_ndn;
2571         }
2572
2573         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2574                 if ( op->o_proxy_authz ) {
2575                         /*
2576                          * FIXME: we do not want to perform proxyAuthz
2577                          * on behalf of the client, because this would
2578                          * be performed with "proxyauthzdn" privileges.
2579                          *
2580                          * This might actually be too strict, since
2581                          * the "proxyauthzdn" authzTo, and each entry's
2582                          * authzFrom attributes may be crafted
2583                          * to avoid unwanted proxyAuthz to take place.
2584                          */
2585 #if 0
2586                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2587                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2588 #endif
2589                         goto done;
2590                 }
2591
2592                 if ( !BER_BVISNULL( bound_ndn ) ) {
2593                         goto done;
2594                 }
2595
2596                 if ( BER_BVISNULL( &ndn ) ) {
2597                         goto done;
2598                 }
2599
2600                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2601                         goto done;
2602                 }
2603
2604         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2605                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2606                 {
2607                         /* already asserted in SASL via native authz */
2608                         goto done;
2609                 }
2610
2611         } else if ( si->si_authz && !isroot ) {
2612                 int             rc;
2613                 struct berval authcDN;
2614
2615                 if ( BER_BVISNULL( &ndn ) ) {
2616                         authcDN = slap_empty_bv;
2617                 } else {
2618                         authcDN = ndn;
2619                 }
2620                 rc = slap_sasl_matches( op, si->si_authz,
2621                                 &authcDN, &authcDN );
2622                 if ( rc != LDAP_SUCCESS ) {
2623                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2624                                 /* ndn is not authorized
2625                                  * to use idassert */
2626                                 rs->sr_err = rc;
2627                         }
2628                         goto done;
2629                 }
2630         }
2631
2632         if ( op->o_proxy_authz ) {
2633                 /*
2634                  * FIXME: we can:
2635                  * 1) ignore the already set proxyAuthz control
2636                  * 2) leave it in place, and don't set ours
2637                  * 3) add both
2638                  * 4) reject the operation
2639                  *
2640                  * option (4) is very drastic
2641                  * option (3) will make the remote server reject
2642                  * the operation, thus being equivalent to (4)
2643                  * option (2) will likely break the idassert
2644                  * assumptions, so we cannot accept it;
2645                  * option (1) means that we are contradicting
2646                  * the client's reques.
2647                  *
2648                  * I think (4) is the only correct choice.
2649                  */
2650                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2651                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2652         }
2653
2654         if ( op->o_is_auth_check ) {
2655                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2656
2657         } else {
2658                 mode = si->si_mode;
2659         }
2660
2661         switch ( mode ) {
2662         case LDAP_BACK_IDASSERT_LEGACY:
2663                 /* original behavior:
2664                  * assert the client's identity */
2665         case LDAP_BACK_IDASSERT_SELF:
2666                 assertedID = ndn;
2667                 break;
2668
2669         case LDAP_BACK_IDASSERT_ANONYMOUS:
2670                 /* assert "anonymous" */
2671                 assertedID = slap_empty_bv;
2672                 break;
2673
2674         case LDAP_BACK_IDASSERT_NOASSERT:
2675                 /* don't assert; bind as proxyauthzdn */
2676                 goto done;
2677
2678         case LDAP_BACK_IDASSERT_OTHERID:
2679         case LDAP_BACK_IDASSERT_OTHERDN:
2680                 /* assert idassert DN */
2681                 assertedID = si->si_bc.sb_authzId;
2682                 break;
2683
2684         default:
2685                 assert( 0 );
2686         }
2687
2688         /* if we got here, "" is allowed to proxyAuthz */
2689         if ( BER_BVISNULL( &assertedID ) ) {
2690                 assertedID = slap_empty_bv;
2691         }
2692
2693         /* don't idassert the bound DN (ITS#4497) */
2694         if ( dn_match( &assertedID, bound_ndn ) ) {
2695                 goto done;
2696         }
2697
2698         ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2699         ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL );
2700
2701         switch ( si->si_mode ) {
2702         /* already in u:ID or dn:DN form */
2703         case LDAP_BACK_IDASSERT_OTHERID:
2704         case LDAP_BACK_IDASSERT_OTHERDN:
2705                 ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx );
2706                 rs->sr_err = LDAP_SUCCESS;
2707                 break;
2708
2709         /* needs the dn: prefix */
2710         default:
2711                 ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2712                 ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1,
2713                                 op->o_tmpmemctx );
2714                 AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2715                 AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2716                                 assertedID.bv_val, assertedID.bv_len + 1 );
2717                 rs->sr_err = LDAP_SUCCESS;
2718                 break;
2719         }
2720
2721         /* Older versions of <draft-weltman-ldapv3-proxy> required
2722          * to encode the value of the authzID (and called it proxyDN);
2723          * this hack provides compatibility with those DSAs that
2724          * implement it this way */
2725         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2726                 struct berval           authzID = ctrl->ldctl_value;
2727                 BerElementBuffer        berbuf;
2728                 BerElement              *ber = (BerElement *)&berbuf;
2729                 ber_tag_t               tag;
2730
2731                 ber_init2( ber, 0, LBER_USE_DER );
2732                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2733
2734                 tag = ber_printf( ber, "O", &authzID );
2735                 if ( tag == LBER_ERROR ) {
2736                         rs->sr_err = LDAP_OTHER;
2737                         goto free_ber;
2738                 }
2739
2740                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2741                         rs->sr_err = LDAP_OTHER;
2742                         goto free_ber;
2743                 }
2744
2745                 rs->sr_err = LDAP_SUCCESS;
2746
2747 free_ber:;
2748                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2749                 ber_free_buf( ber );
2750
2751                 if ( rs->sr_err != LDAP_SUCCESS ) {
2752                         goto done;
2753                 }
2754
2755         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2756                 struct berval           authzID = ctrl->ldctl_value,
2757                                         tmp;
2758                 BerElementBuffer        berbuf;
2759                 BerElement              *ber = (BerElement *)&berbuf;
2760                 ber_tag_t               tag;
2761
2762                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2763                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2764                         goto done;
2765                 }
2766
2767                 tmp = authzID;
2768                 tmp.bv_val += STRLENOF( "dn:" );
2769                 tmp.bv_len -= STRLENOF( "dn:" );
2770
2771                 ber_init2( ber, 0, LBER_USE_DER );
2772                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2773
2774                 /* apparently, Mozilla API encodes this
2775                  * as "SEQUENCE { LDAPDN }" */
2776                 tag = ber_printf( ber, "{O}", &tmp );
2777                 if ( tag == LBER_ERROR ) {
2778                         rs->sr_err = LDAP_OTHER;
2779                         goto free_ber2;
2780                 }
2781
2782                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2783                         rs->sr_err = LDAP_OTHER;
2784                         goto free_ber2;
2785                 }
2786
2787                 ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2788                 rs->sr_err = LDAP_SUCCESS;
2789
2790 free_ber2:;
2791                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2792                 ber_free_buf( ber );
2793
2794                 if ( rs->sr_err != LDAP_SUCCESS ) {
2795                         goto done;
2796                 }
2797         }
2798
2799 done:;
2800
2801         return rs->sr_err;
2802 }
2803
2804 /*
2805  * Add controls;
2806  *
2807  * if any needs to be added, it is prepended to existing ones,
2808  * in a newly allocated array.  The companion function
2809  * ldap_back_controls_free() must be used to restore the original
2810  * status of op->o_ctrls.
2811  */
2812 int
2813 ldap_back_controls_add(
2814                 Operation       *op,
2815                 SlapReply       *rs,
2816                 ldapconn_t      *lc,
2817                 LDAPControl     ***pctrls )
2818 {
2819         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2820
2821         LDAPControl     **ctrls = NULL;
2822         /* set to the maximum number of controls this backend can add */
2823         LDAPControl     c[ 2 ] = { { 0 } };
2824         int             n = 0, i, j1 = 0, j2 = 0;
2825
2826         *pctrls = NULL;
2827
2828         rs->sr_err = LDAP_SUCCESS;
2829
2830         /* don't add controls if protocol is not LDAPv3 */
2831         switch ( li->li_version ) {
2832         case LDAP_VERSION3:
2833                 break;
2834
2835         case 0:
2836                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2837                         break;
2838                 }
2839                 /* fall thru */
2840
2841         default:
2842                 goto done;
2843         }
2844
2845         /* put controls that go __before__ existing ones here */
2846
2847         /* proxyAuthz for identity assertion */
2848         switch ( ldap_back_proxy_authz_ctrl( op, rs, &lc->lc_bound_ndn,
2849                 li->li_version, &li->li_idassert, &c[ j1 ] ) )
2850         {
2851         case SLAP_CB_CONTINUE:
2852                 break;
2853
2854         case LDAP_SUCCESS:
2855                 j1++;
2856                 break;
2857
2858         default:
2859                 goto done;
2860         }
2861
2862         /* put controls that go __after__ existing ones here */
2863
2864 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
2865         /* FIXME: according to <draft-wahl-ldap-session>,
2866          * the server should check if the control can be added
2867          * based on the identity of the client and so */
2868
2869         /* session tracking */
2870         if ( LDAP_BACK_ST_REQUEST( li ) ) {
2871                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
2872                 case SLAP_CB_CONTINUE:
2873                         break;
2874
2875                 case LDAP_SUCCESS:
2876                         j2++;
2877                         break;
2878
2879                 default:
2880                         goto done;
2881                 }
2882         }
2883 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
2884
2885         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
2886                 rs->sr_err = LDAP_SUCCESS;
2887         }
2888
2889         /* if nothing to do, just bail out */
2890         if ( j1 == 0 && j2 == 0 ) {
2891                 goto done;
2892         }
2893
2894         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
2895
2896         if ( op->o_ctrls ) {
2897                 for ( n = 0; op->o_ctrls[ n ]; n++ )
2898                         /* just count ctrls */ ;
2899         }
2900
2901         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
2902                         op->o_tmpmemctx );
2903         if ( j1 ) {
2904                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
2905                 *ctrls[ 0 ] = c[ 0 ];
2906                 for ( i = 1; i < j1; i++ ) {
2907                         ctrls[ i ] = &ctrls[ 0 ][ i ];
2908                         *ctrls[ i ] = c[ i ];
2909                 }
2910         }
2911
2912         i = 0;
2913         if ( op->o_ctrls ) {
2914                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2915                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
2916                 }
2917         }
2918
2919         n += j1;
2920         if ( j2 ) {
2921                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
2922                 *ctrls[ n ] = c[ j1 ];
2923                 for ( i = 1; i < j2; i++ ) {
2924                         ctrls[ n + i ] = &ctrls[ n ][ i ];
2925                         *ctrls[ n + i ] = c[ i ];
2926                 }
2927         }
2928
2929         ctrls[ n + j2 ] = NULL;
2930
2931 done:;
2932         if ( ctrls == NULL ) {
2933                 ctrls = op->o_ctrls;
2934         }
2935
2936         *pctrls = ctrls;
2937
2938         return rs->sr_err;
2939 }
2940
2941 int
2942 ldap_back_controls_free( Operation *op, SlapReply *rs, LDAPControl ***pctrls )
2943 {
2944         LDAPControl     **ctrls = *pctrls;
2945
2946         /* we assume that the controls added by the proxy come first,
2947          * so as soon as we find op->o_ctrls[ 0 ] we can stop */
2948         if ( ctrls && ctrls != op->o_ctrls ) {
2949                 int             i = 0, n = 0, n_added;
2950                 LDAPControl     *lower, *upper;
2951
2952                 assert( ctrls[ 0 ] != NULL );
2953
2954                 for ( n = 0; ctrls[ n ] != NULL; n++ )
2955                         /* count 'em */ ;
2956
2957                 if ( op->o_ctrls ) {
2958                         for ( i = 0; op->o_ctrls[ i ] != NULL; i++ )
2959                                 /* count 'em */ ;
2960                 }
2961
2962                 n_added = n - i;
2963                 lower = (LDAPControl *)&ctrls[ n ];
2964                 upper = &lower[ n_added ];
2965
2966                 for ( i = 0; ctrls[ i ] != NULL; i++ ) {
2967                         if ( ctrls[ i ] < lower || ctrls[ i ] >= upper ) {
2968                                 /* original; don't touch */
2969                                 continue;
2970                         }
2971
2972                         if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
2973                                 op->o_tmpfree( ctrls[ i ]->ldctl_value.bv_val, op->o_tmpmemctx );
2974                         }
2975                 }
2976
2977                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2978         }
2979
2980         *pctrls = NULL;
2981
2982         return 0;
2983 }
2984
2985 int
2986 ldap_back_conn2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
2987 {
2988         char tbuf[ SLAP_TEXT_BUFLEN ];
2989         char *ptr = buf, *end = buf + buflen;
2990         int len;
2991
2992         if ( ptr + sizeof("conn=") > end ) return -1;
2993         ptr = lutil_strcopy( ptr, "conn=" );
2994
2995         len = ldap_back_connid2str( lc, ptr, (ber_len_t)(end - ptr) );
2996         ptr += len;
2997         if ( ptr >= end ) return -1;
2998
2999         if ( !BER_BVISNULL( &lc->lcb_local_ndn ) ) {
3000                 if ( ptr + sizeof(" DN=\"\"") + lc->lcb_local_ndn.bv_len > end ) return -1;
3001                 ptr = lutil_strcopy( ptr, " DN=\"" );
3002                 ptr = lutil_strncopy( ptr, lc->lcb_local_ndn.bv_val, lc->lcb_local_ndn.bv_len );
3003                 *ptr++ = '"';
3004         }
3005
3006         if ( lc->lcb_create_time != 0 ) {
3007                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_create_time );
3008                 if ( ptr + sizeof(" created=") + len >= end ) return -1;
3009                 ptr = lutil_strcopy( ptr, " created=" );
3010                 ptr = lutil_strcopy( ptr, tbuf );
3011         }
3012
3013         if ( lc->lcb_time != 0 ) {
3014                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_time );
3015                 if ( ptr + sizeof(" modified=") + len >= end ) return -1;
3016                 ptr = lutil_strcopy( ptr, " modified=" );
3017                 ptr = lutil_strcopy( ptr, tbuf );
3018         }
3019
3020         len = snprintf( tbuf, sizeof(tbuf), "%u", lc->lcb_refcnt );
3021         if ( ptr + sizeof(" refcnt=") + len >= end ) return -1;
3022         ptr = lutil_strcopy( ptr, " refcnt=" );
3023         ptr = lutil_strcopy( ptr, tbuf );
3024
3025         return ptr - buf;
3026 }
3027
3028 int
3029 ldap_back_connid2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
3030 {
3031         static struct berval conns[] = {
3032                 BER_BVC("ROOTDN"),
3033                 BER_BVC("ROOTDN-TLS"),
3034                 BER_BVC("ANON"),
3035                 BER_BVC("ANON-TLS"),
3036                 BER_BVC("BIND"),
3037                 BER_BVC("BIND-TLS"),
3038                 BER_BVNULL
3039         };
3040
3041         int len = 0;
3042
3043         if ( LDAP_BACK_PCONN_ISPRIV( (const ldapconn_t *)lc ) ) {
3044                 long cid;
3045                 struct berval *bv;
3046
3047                 cid = (long)lc->lcb_conn;
3048                 assert( cid >= LDAP_BACK_PCONN_FIRST && cid < LDAP_BACK_PCONN_LAST );
3049
3050                 bv = &conns[ cid ];
3051
3052                 if ( bv->bv_len >= buflen ) {
3053                         return bv->bv_len + 1;
3054                 }
3055
3056                 len = bv->bv_len;
3057                 lutil_strncopy( buf, bv->bv_val, bv->bv_len + 1 );
3058
3059         } else {
3060                 len = snprintf( buf, buflen, "%lu", lc->lcb_conn->c_connid );
3061         }
3062
3063         return len;
3064 }