git.sur5r.net Git - openldap/blob - servers/slapd/connection.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2004 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29 #include <limits.h>
  30
  31 #include <ac/socket.h>
  32 #include <ac/errno.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "ldap_pvt.h"
  38 #include "lutil.h"
  39 #include "slap.h"
  40
  41 #ifdef LDAP_SLAPI
  42 #include "slapi/slapi.h"
  43 #endif
  44
  45 /* protected by connections_mutex */
  46 static ldap_pvt_thread_mutex_t connections_mutex;
  47 static Connection *connections = NULL;
  48 static unsigned long conn_nextid = 0;
  49
  50 /* structure state (protected by connections_mutex) */
  51 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  52 #define SLAP_C_UNUSED                   0x01
  53 #define SLAP_C_USED                             0x02
  54
  55 /* connection state (protected by c_mutex ) */
  56 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  57 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  58 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  59 #define SLAP_C_BINDING                  0x03    /* binding */
  60 #define SLAP_C_CLOSING                  0x04    /* closing */
  61 #define SLAP_C_CLIENT                   0x05    /* outbound client conn */
  62
  63 const char *
  64 connection_state2str( int state )
  65 {
  66         switch( state ) {
  67         case SLAP_C_INVALID:    return "!";
  68         case SLAP_C_INACTIVE:   return "|";
  69         case SLAP_C_ACTIVE:             return "";
  70         case SLAP_C_BINDING:    return "B";
  71         case SLAP_C_CLOSING:    return "C";
  72         case SLAP_C_CLIENT:             return "L";
  73         }
  74
  75         return "?";
  76 }
  77
  78 static Connection* connection_get( ber_socket_t s );
  79
  80 static int connection_input( Connection *c );
  81 static void connection_close( Connection *c );
  82
  83 static int connection_op_activate( Operation *op );
  84 static int connection_resched( Connection *conn );
  85 static void connection_abandon( Connection *conn );
  86 static void connection_destroy( Connection *c );
  87
  88 static ldap_pvt_thread_start_t connection_operation;
  89
  90 /*
  91  * Initialize connection management infrastructure.
  92  */
  93 int connections_init(void)
  94 {
  95         int i;
  96
  97         assert( connections == NULL );
  98
  99         if( connections != NULL) {
 100 #ifdef NEW_LOGGING
 101                 LDAP_LOG( CONNECTION, INFO,
 102                         "connections_init: already initialized.\n", 0, 0, 0 );
 103 #else
 104                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 105                         0, 0, 0 );
 106 #endif
 107                 return -1;
 108         }
 109
 110         /* should check return of every call */
 111         ldap_pvt_thread_mutex_init( &connections_mutex );
 112
 113         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 114
 115         if( connections == NULL ) {
 116 #ifdef NEW_LOGGING
 117                 LDAP_LOG( CONNECTION, ERR,
 118                         "connections_init: allocation (%d * %ld) of connection "
 119                         "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
 120 #else
 121                 Debug( LDAP_DEBUG_ANY,
 122                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 123                         dtblsize, (long) sizeof(Connection), 0 );
 124 #endif
 125                 return -1;
 126         }
 127
 128         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 129         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 130
 131         for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 132
 133         /*
 134          * per entry initialization of the Connection array initialization
 135          * will be done by connection_init()
 136          */
 137
 138         return 0;
 139 }
 140
 141 /*
 142  * Destroy connection management infrastructure.
 143  */
 144 int connections_destroy(void)
 145 {
 146         ber_socket_t i;
 147
 148         /* should check return of every call */
 149
 150         if( connections == NULL) {
 151 #ifdef NEW_LOGGING
 152                 LDAP_LOG( CONNECTION, INFO,
 153                         "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 154 #else
 155                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 156                         0, 0, 0 );
 157 #endif
 158                 return -1;
 159         }
 160
 161         for ( i = 0; i < dtblsize; i++ ) {
 162                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 163                         ber_sockbuf_free( connections[i].c_sb );
 164                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 165                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 166                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 167 #ifdef LDAP_SLAPI
 168                         if ( slapi_plugins_used ) {
 169                                 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &connections[i] );
 170                         }
 171 #endif
 172                 }
 173         }
 174
 175         free( connections );
 176         connections = NULL;
 177
 178         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 179         return 0;
 180 }
 181
 182 /*
 183  * shutdown all connections
 184  */
 185 int connections_shutdown(void)
 186 {
 187         ber_socket_t i;
 188
 189         ldap_pvt_thread_mutex_lock( &connections_mutex );
 190
 191         for ( i = 0; i < dtblsize; i++ ) {
 192                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 193                         continue;
 194                 }
 195                 /* give persistent clients a chance to cleanup */
 196                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 197                         ldap_pvt_thread_pool_submit( &connection_pool,
 198                         connections[i].c_clientfunc, connections[i].c_clientarg );
 199                         continue;
 200                 }
 201
 202                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 203
 204                 /* connections_mutex and c_mutex are locked */
 205                 connection_closing( &connections[i] );
 206                 connection_close( &connections[i] );
 207
 208                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 209         }
 210
 211         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 212
 213         return 0;
 214 }
 215
 216 /*
 217  * Timeout idle connections.
 218  */
 219 int connections_timeout_idle(time_t now)
 220 {
 221         int i = 0;
 222         int connindex;
 223         Connection* c;
 224
 225         for( c = connection_first( &connindex );
 226                 c != NULL;
 227                 c = connection_next( c, &connindex ) )
 228         {
 229                 /* Don't timeout a slow-running request or a persistent
 230                  * outbound connection */
 231                 if( c->c_n_ops_executing ||
 232                         c->c_conn_state == SLAP_C_CLIENT ) continue;
 233
 234                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 235                         /* close it */
 236                         connection_closing( c );
 237                         connection_close( c );
 238                         i++;
 239                 }
 240         }
 241         connection_done( c );
 242
 243         return i;
 244 }
 245
 246 static Connection* connection_get( ber_socket_t s )
 247 {
 248         /* connections_mutex should be locked by caller */
 249
 250         Connection *c;
 251
 252 #ifdef NEW_LOGGING
 253         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 254 #else
 255         Debug( LDAP_DEBUG_ARGS,
 256                 "connection_get(%ld)\n",
 257                 (long) s, 0, 0 );
 258 #endif
 259
 260         assert( connections != NULL );
 261
 262         if(s == AC_SOCKET_INVALID) {
 263                 return NULL;
 264         }
 265
 266 #ifndef HAVE_WINSOCK
 267         c = &connections[s];
 268
 269         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 270
 271 #else
 272         c = NULL;
 273         {
 274                 ber_socket_t i, sd;
 275
 276                 for(i=0; i<dtblsize; i++) {
 277                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 278                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 279                                 assert( connections[i].c_sb == 0 );
 280                                 break;
 281                         }
 282
 283                         ber_sockbuf_ctrl( connections[i].c_sb,
 284                                 LBER_SB_OPT_GET_FD, &sd );
 285
 286                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 287                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 288                                 assert( sd == AC_SOCKET_INVALID );
 289                                 continue;
 290                         }
 291
 292                         /* state can actually change from used -> unused by resched,
 293                          * so don't assert details here.
 294                          */
 295
 296                         if( sd == s ) {
 297                                 c = &connections[i];
 298                                 break;
 299                         }
 300                 }
 301         }
 302 #endif
 303
 304         if( c != NULL ) {
 305                 ber_socket_t    sd;
 306
 307                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 308
 309                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 310                 if( c->c_struct_state != SLAP_C_USED ) {
 311                         /* connection must have been closed due to resched */
 312
 313                         assert( c->c_conn_state == SLAP_C_INVALID );
 314                         assert( sd == AC_SOCKET_INVALID );
 315
 316 #ifdef NEW_LOGGING
 317                         LDAP_LOG( CONNECTION, ARGS,
 318                                 "connection_get: connection %d not used\n", s, 0, 0 );
 319 #else
 320                         Debug( LDAP_DEBUG_TRACE,
 321                                 "connection_get(%d): connection not used\n",
 322                                 s, 0, 0 );
 323 #endif
 324
 325                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 326                         return NULL;
 327                 }
 328
 329 #ifdef NEW_LOGGING
 330                 LDAP_LOG( CONNECTION, RESULTS,
 331                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 332 #else
 333                 Debug( LDAP_DEBUG_TRACE,
 334                         "connection_get(%d): got connid=%lu\n",
 335                         s, c->c_connid, 0 );
 336 #endif
 337
 338                 c->c_n_get++;
 339
 340                 assert( c->c_struct_state == SLAP_C_USED );
 341                 assert( c->c_conn_state != SLAP_C_INVALID );
 342                 assert( sd != AC_SOCKET_INVALID );
 343
 344 #ifdef SLAPD_MONITOR
 345                 c->c_activitytime = slap_get_time();
 346 #else
 347                 if( global_idletimeout > 0 ) {
 348                         c->c_activitytime = slap_get_time();
 349                 }
 350 #endif
 351         }
 352
 353         return c;
 354 }
 355
 356 static void connection_return( Connection *c )
 357 {
 358         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 359 }
 360
 361 long connection_init(
 362         ber_socket_t s,
 363         Listener *listener,
 364         const char* dnsname,
 365         const char* peername,
 366         int flags,
 367         slap_ssf_t ssf,
 368         struct berval *authid )
 369 {
 370         unsigned long id;
 371         Connection *c;
 372
 373         assert( connections != NULL );
 374
 375         assert( listener != NULL );
 376         assert( dnsname != NULL );
 377         assert( peername != NULL );
 378
 379 #ifndef HAVE_TLS
 380         assert( flags != CONN_IS_TLS );
 381 #endif
 382
 383         if( s == AC_SOCKET_INVALID ) {
 384 #ifdef NEW_LOGGING
 385                 LDAP_LOG( CONNECTION, INFO,
 386                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 387 #else
 388                 Debug( LDAP_DEBUG_ANY,
 389                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 390 #endif
 391                 return -1;
 392         }
 393
 394         assert( s >= 0 );
 395 #ifndef HAVE_WINSOCK
 396         assert( s < dtblsize );
 397 #endif
 398
 399         ldap_pvt_thread_mutex_lock( &connections_mutex );
 400
 401 #ifndef HAVE_WINSOCK
 402         c = &connections[s];
 403
 404 #else
 405         {
 406                 ber_socket_t i;
 407                 c = NULL;
 408
 409                 for( i=0; i < dtblsize; i++) {
 410                         ber_socket_t    sd;
 411
 412                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 413                                 assert( connections[i].c_sb == 0 );
 414                                 c = &connections[i];
 415                                 break;
 416                         }
 417
 418                         sd = AC_SOCKET_INVALID;
 419                         if (connections[i].c_sb != NULL) {
 420                                 ber_sockbuf_ctrl( connections[i].c_sb,
 421                                         LBER_SB_OPT_GET_FD, &sd );
 422                         }
 423
 424                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 425                                 assert( sd == AC_SOCKET_INVALID );
 426                                 c = &connections[i];
 427                                 break;
 428                         }
 429
 430                         if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 431                                 continue;
 432                         }
 433
 434                         assert( connections[i].c_struct_state == SLAP_C_USED );
 435                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 436                         assert( sd != AC_SOCKET_INVALID );
 437                 }
 438
 439                 if( c == NULL ) {
 440 #ifdef NEW_LOGGING
 441                         LDAP_LOG( CONNECTION, INFO,
 442                                 "connection_init(%d): connection table full "
 443                                 "(%d/%d)\n", s, i, dtblsize );
 444 #else
 445                         Debug( LDAP_DEBUG_ANY,
 446                                 "connection_init(%d): connection table full "
 447                                 "(%d/%d)\n", s, i, dtblsize);
 448 #endif
 449                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 450                         return -1;
 451                 }
 452         }
 453 #endif
 454
 455         assert( c != NULL );
 456
 457         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 458                 c->c_send_ldap_result = slap_send_ldap_result;
 459                 c->c_send_search_entry = slap_send_search_entry;
 460                 c->c_send_search_reference = slap_send_search_reference;
 461                 c->c_send_ldap_extended = slap_send_ldap_extended;
 462 #ifdef LDAP_RES_INTERMEDIATE
 463                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 464 #endif
 465
 466                 c->c_authmech.bv_val = NULL;
 467                 c->c_authmech.bv_len = 0;
 468                 c->c_dn.bv_val = NULL;
 469                 c->c_dn.bv_len = 0;
 470                 c->c_ndn.bv_val = NULL;
 471                 c->c_ndn.bv_len = 0;
 472
 473                 c->c_listener = NULL;
 474                 c->c_peer_domain.bv_val = NULL;
 475                 c->c_peer_domain.bv_len = 0;
 476                 c->c_peer_name.bv_val = NULL;
 477                 c->c_peer_name.bv_len = 0;
 478
 479                 LDAP_STAILQ_INIT(&c->c_ops);
 480                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 481
 482                 c->c_sasl_bind_mech.bv_val = NULL;
 483                 c->c_sasl_bind_mech.bv_len = 0;
 484                 c->c_sasl_done = 0;
 485                 c->c_sasl_authctx = NULL;
 486                 c->c_sasl_sockctx = NULL;
 487                 c->c_sasl_extra = NULL;
 488                 c->c_sasl_bindop = NULL;
 489
 490                 c->c_sb = ber_sockbuf_alloc( );
 491
 492                 {
 493                         ber_len_t max = sockbuf_max_incoming;
 494                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 495                 }
 496
 497                 c->c_currentber = NULL;
 498
 499                 /* should check status of thread calls */
 500                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 501                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 502                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 503
 504 #ifdef LDAP_SLAPI
 505                 if ( slapi_plugins_used ) {
 506                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 507                 }
 508 #endif
 509
 510                 c->c_struct_state = SLAP_C_UNUSED;
 511         }
 512
 513         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 514
 515         assert( c->c_struct_state == SLAP_C_UNUSED );
 516         assert( c->c_authmech.bv_val == NULL );
 517         assert( c->c_dn.bv_val == NULL );
 518         assert( c->c_ndn.bv_val == NULL );
 519         assert( c->c_listener == NULL );
 520         assert( c->c_peer_domain.bv_val == NULL );
 521         assert( c->c_peer_name.bv_val == NULL );
 522         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 523         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 524         assert( c->c_sasl_bind_mech.bv_val == NULL );
 525         assert( c->c_sasl_done == 0 );
 526         assert( c->c_sasl_authctx == NULL );
 527         assert( c->c_sasl_sockctx == NULL );
 528         assert( c->c_sasl_extra == NULL );
 529         assert( c->c_sasl_bindop == NULL );
 530         assert( c->c_currentber == NULL );
 531         assert( c->c_writewaiter == 0);
 532
 533         c->c_listener = listener;
 534
 535         if ( flags == CONN_IS_CLIENT ) {
 536                 c->c_conn_state = SLAP_C_CLIENT;
 537                 c->c_struct_state = SLAP_C_USED;
 538                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
 539                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 540                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 541
 542                 return 0;
 543         }
 544
 545         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 546         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 547
 548         c->c_n_ops_received = 0;
 549         c->c_n_ops_executing = 0;
 550         c->c_n_ops_pending = 0;
 551         c->c_n_ops_completed = 0;
 552
 553         c->c_n_get = 0;
 554         c->c_n_read = 0;
 555         c->c_n_write = 0;
 556
 557         /* set to zero until bind, implies LDAP_VERSION3 */
 558         c->c_protocol = 0;
 559
 560 #ifdef SLAPD_MONITOR
 561         c->c_activitytime = c->c_starttime = slap_get_time();
 562 #else
 563         if( global_idletimeout > 0 ) {
 564                 c->c_activitytime = c->c_starttime = slap_get_time();
 565         }
 566 #endif
 567
 568 #ifdef LDAP_CONNECTIONLESS
 569         c->c_is_udp = 0;
 570         if( flags == CONN_IS_UDP ) {
 571                 c->c_is_udp = 1;
 572 #ifdef LDAP_DEBUG
 573                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 574                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 575 #endif
 576                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 577                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 578                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 579                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 580         } else
 581 #endif
 582         {
 583 #ifdef LDAP_DEBUG
 584                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 585                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 586 #endif
 587                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 588                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 589         }
 590
 591 #ifdef LDAP_DEBUG
 592         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 593                 INT_MAX, (void*)"ldap_" );
 594 #endif
 595
 596         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 597                 c /* non-NULL */ ) < 0 )
 598         {
 599 #ifdef NEW_LOGGING
 600                 LDAP_LOG( CONNECTION, INFO,
 601                         "connection_init: conn %lu set nonblocking failed\n",
 602                         c->c_connid, 0, 0 );
 603 #else
 604                 Debug( LDAP_DEBUG_ANY,
 605                         "connection_init(%d, %s): set nonblocking failed\n",
 606                         s, c->c_peer_name.bv_val, 0 );
 607 #endif
 608         }
 609
 610         id = c->c_connid = conn_nextid++;
 611
 612         c->c_conn_state = SLAP_C_INACTIVE;
 613         c->c_struct_state = SLAP_C_USED;
 614
 615         c->c_ssf = c->c_transport_ssf = ssf;
 616         c->c_tls_ssf = 0;
 617
 618 #ifdef HAVE_TLS
 619         if ( flags == CONN_IS_TLS ) {
 620                 c->c_is_tls = 1;
 621                 c->c_needs_tls_accept = 1;
 622         } else {
 623                 c->c_is_tls = 0;
 624                 c->c_needs_tls_accept = 0;
 625         }
 626 #endif
 627
 628         slap_sasl_open( c, 0 );
 629         slap_sasl_external( c, ssf, authid );
 630
 631         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 632         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 633
 634         backend_connection_init(c);
 635
 636         return id;
 637 }
 638
 639 void connection2anonymous( Connection *c )
 640 {
 641         assert( connections != NULL );
 642         assert( c != NULL );
 643
 644         {
 645                 ber_len_t max = sockbuf_max_incoming;
 646                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 647         }
 648
 649         if(c->c_authmech.bv_val != NULL ) {
 650                 free(c->c_authmech.bv_val);
 651                 c->c_authmech.bv_val = NULL;
 652         }
 653         c->c_authmech.bv_len = 0;
 654
 655         if(c->c_dn.bv_val != NULL) {
 656                 free(c->c_dn.bv_val);
 657                 c->c_dn.bv_val = NULL;
 658         }
 659         c->c_dn.bv_len = 0;
 660         if(c->c_ndn.bv_val != NULL) {
 661                 free(c->c_ndn.bv_val);
 662                 c->c_ndn.bv_val = NULL;
 663         }
 664         c->c_ndn.bv_len = 0;
 665
 666         c->c_authz_backend = NULL;
 667 }
 668
 669 static void
 670 connection_destroy( Connection *c )
 671 {
 672         /* note: connections_mutex should be locked by caller */
 673         ber_socket_t    sd;
 674         unsigned long   connid;
 675
 676         assert( connections != NULL );
 677         assert( c != NULL );
 678         assert( c->c_struct_state != SLAP_C_UNUSED );
 679         assert( c->c_conn_state != SLAP_C_INVALID );
 680         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 681         assert( c->c_writewaiter == 0);
 682
 683         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 684         connid = c->c_connid;
 685
 686         backend_connection_destroy(c);
 687
 688         c->c_protocol = 0;
 689         c->c_connid = -1;
 690
 691         c->c_activitytime = c->c_starttime = 0;
 692
 693         connection2anonymous( c );
 694         c->c_listener = NULL;
 695
 696         if(c->c_peer_domain.bv_val != NULL) {
 697                 free(c->c_peer_domain.bv_val);
 698                 c->c_peer_domain.bv_val = NULL;
 699         }
 700         c->c_peer_domain.bv_len = 0;
 701         if(c->c_peer_name.bv_val != NULL) {
 702                 free(c->c_peer_name.bv_val);
 703                 c->c_peer_name.bv_val = NULL;
 704         }
 705         c->c_peer_name.bv_len = 0;
 706
 707         c->c_sasl_bind_in_progress = 0;
 708         if(c->c_sasl_bind_mech.bv_val != NULL) {
 709                 free(c->c_sasl_bind_mech.bv_val);
 710                 c->c_sasl_bind_mech.bv_val = NULL;
 711         }
 712         c->c_sasl_bind_mech.bv_len = 0;
 713
 714         slap_sasl_close( c );
 715
 716         if ( c->c_currentber != NULL ) {
 717                 ber_free( c->c_currentber, 1 );
 718                 c->c_currentber = NULL;
 719         }
 720
 721         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 722         if ( sd != AC_SOCKET_INVALID ) {
 723                 slapd_remove( sd, 1, 0 );
 724
 725                 Statslog( LDAP_DEBUG_STATS,
 726                         "conn=%lu fd=%ld closed\n",
 727                         connid, (long) sd, 0, 0, 0 );
 728         }
 729
 730         ber_sockbuf_free( c->c_sb );
 731
 732         c->c_sb = ber_sockbuf_alloc( );
 733
 734         {
 735                 ber_len_t max = sockbuf_max_incoming;
 736                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 737         }
 738
 739         c->c_conn_state = SLAP_C_INVALID;
 740         c->c_struct_state = SLAP_C_UNUSED;
 741
 742 #ifdef LDAP_SLAPI
 743         /* call destructors, then constructors; avoids unnecessary allocation */
 744         if ( slapi_plugins_used ) {
 745                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 746         }
 747 #endif
 748 }
 749
 750 int connection_state_closing( Connection *c )
 751 {
 752         /* c_mutex must be locked by caller */
 753
 754         int state;
 755         assert( c != NULL );
 756         assert( c->c_struct_state == SLAP_C_USED );
 757
 758         state = c->c_conn_state;
 759
 760         assert( state != SLAP_C_INVALID );
 761
 762         return state == SLAP_C_CLOSING;
 763 }
 764
 765 static void connection_abandon( Connection *c )
 766 {
 767         /* c_mutex must be locked by caller */
 768
 769         Operation *o;
 770
 771         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 772                 o->o_abandon = 1;
 773         }
 774
 775         /* remove pending operations */
 776         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 777                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 778                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 779                 slap_op_free( o );
 780         }
 781 }
 782
 783 void connection_closing( Connection *c )
 784 {
 785         assert( connections != NULL );
 786         assert( c != NULL );
 787         assert( c->c_struct_state == SLAP_C_USED );
 788         assert( c->c_conn_state != SLAP_C_INVALID );
 789
 790         /* c_mutex must be locked by caller */
 791
 792         if( c->c_conn_state != SLAP_C_CLOSING ) {
 793                 ber_socket_t    sd;
 794
 795                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 796 #ifdef NEW_LOGGING
 797                 LDAP_LOG( CONNECTION, DETAIL1,
 798                         "connection_closing: conn %lu readying socket %d for close.\n",
 799                         c->c_connid, sd, 0 );
 800 #else
 801                 Debug( LDAP_DEBUG_TRACE,
 802                         "connection_closing: readying conn=%lu sd=%d for close\n",
 803                         c->c_connid, sd, 0 );
 804 #endif
 805                 /* update state to closing */
 806                 c->c_conn_state = SLAP_C_CLOSING;
 807
 808                 /* don't listen on this port anymore */
 809                 slapd_clr_read( sd, 1 );
 810
 811                 /* abandon active operations */
 812                 connection_abandon( c );
 813
 814                 /* wake write blocked operations */
 815                 slapd_clr_write( sd, 1 );
 816                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 817         }
 818 }
 819
 820 static void connection_close( Connection *c )
 821 {
 822         ber_socket_t    sd;
 823
 824         assert( connections != NULL );
 825         assert( c != NULL );
 826         assert( c->c_struct_state == SLAP_C_USED );
 827         assert( c->c_conn_state == SLAP_C_CLOSING );
 828
 829         /* note: connections_mutex and c_mutex should be locked by caller */
 830
 831         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 832         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 833 #ifdef NEW_LOGGING
 834                 LDAP_LOG( CONNECTION, DETAIL1,
 835                         "connection_close: conn %lu deferring sd %d\n",
 836                                 c->c_connid, sd, 0 );
 837 #else
 838                 Debug( LDAP_DEBUG_TRACE,
 839                         "connection_close: deferring conn=%lu sd=%d\n",
 840                         c->c_connid, sd, 0 );
 841 #endif
 842                 return;
 843         }
 844
 845 #ifdef NEW_LOGGING
 846         LDAP_LOG( CONNECTION, RESULTS,
 847                 "connection_close: conn %lu sd %d\n", c->c_connid, sd, 0 );
 848 #else
 849         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 850                 c->c_connid, sd, 0 );
 851 #endif
 852         connection_destroy( c );
 853 }
 854
 855 unsigned long connections_nextid(void)
 856 {
 857         unsigned long id;
 858         assert( connections != NULL );
 859
 860         ldap_pvt_thread_mutex_lock( &connections_mutex );
 861
 862         id = conn_nextid;
 863
 864         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 865
 866         return id;
 867 }
 868
 869 Connection* connection_first( ber_socket_t *index )
 870 {
 871         assert( connections != NULL );
 872         assert( index != NULL );
 873
 874         ldap_pvt_thread_mutex_lock( &connections_mutex );
 875
 876         *index = 0;
 877
 878         return connection_next(NULL, index);
 879 }
 880
 881 Connection* connection_next( Connection *c, ber_socket_t *index )
 882 {
 883         assert( connections != NULL );
 884         assert( index != NULL );
 885         assert( *index <= dtblsize );
 886
 887         if( c != NULL ) {
 888                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 889         }
 890
 891         c = NULL;
 892
 893         for(; *index < dtblsize; (*index)++) {
 894                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 895                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 896 #ifndef HAVE_WINSOCK
 897                         continue;
 898 #else
 899                         break;
 900 #endif
 901                 }
 902
 903                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 904                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 905                         c = &connections[(*index)++];
 906                         break;
 907                 }
 908
 909                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 910                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 911         }
 912
 913         if( c != NULL ) {
 914                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 915         }
 916
 917         return c;
 918 }
 919
 920 void connection_done( Connection *c )
 921 {
 922         assert( connections != NULL );
 923
 924         if( c != NULL ) {
 925                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 926         }
 927
 928         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 929 }
 930
 931 /*
 932  * connection_activity - handle the request operation op on connection
 933  * conn.  This routine figures out what kind of operation it is and
 934  * calls the appropriate stub to handle it.
 935  */
 936
 937 #ifdef SLAPD_MONITOR
 938 #define INCR_OP(var,index) \
 939         do { \
 940                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 941                 (var)[(index)]++; \
 942                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 943         } while (0)
 944 #else /* !SLAPD_MONITOR */
 945 #define INCR_OP(var,index)
 946 #endif /* !SLAPD_MONITOR */
 947
 948 static void *
 949 connection_operation( void *ctx, void *arg_v )
 950 {
 951         int rc = SLAPD_DISCONNECT;
 952         Operation *op = arg_v;
 953         SlapReply rs = {REP_RESULT};
 954         ber_tag_t tag = op->o_tag;
 955 #ifdef SLAPD_MONITOR
 956         ber_tag_t oldtag = tag;
 957 #endif /* SLAPD_MONITOR */
 958         Connection *conn = op->o_conn;
 959         void *memctx = NULL;
 960         void *memctx_null = NULL;
 961         ber_len_t memsiz;
 962
 963         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 964         num_ops_initiated++;
 965         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 966
 967         op->o_threadctx = ctx;
 968
 969         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 970 #ifdef NEW_LOGGING
 971                 LDAP_LOG( CONNECTION, ERR,
 972                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 973                         conn->c_connid, (long)tag, 0 );
 974 #else
 975                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 976                         "error: SASL bind in progress (tag=%ld).\n",
 977                         (long) tag, 0, 0 );
 978 #endif
 979                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 980                         "SASL bind in progress" );
 981                 goto operations_error;
 982         }
 983
 984         /* We can use Thread-Local storage for most mallocs. We can
 985          * also use TL for ber parsing, but not on Add or Modify.
 986          */
 987 #if 0
 988         memsiz = ber_len( op->o_ber ) * 64;
 989         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
 990 #endif
 991         memsiz = SLAP_SLAB_SIZE;
 992
 993         memctx = slap_sl_mem_create( memsiz, ctx );
 994         op->o_tmpmemctx = memctx;
 995         op->o_tmpmfuncs = &slap_sl_mfuncs;
 996         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
 997                 /* Note - the ber and its buffer are already allocated from
 998                  * regular memory; this only affects subsequent mallocs that
 999                  * ber_scanf may invoke.
1000                  */
1001                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1002         }
1003
1004         switch ( tag ) {
1005         case LDAP_REQ_BIND:
1006                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
1007                 rc = do_bind( op, &rs );
1008                 break;
1009
1010         case LDAP_REQ_UNBIND:
1011                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
1012                 rc = do_unbind( op, &rs );
1013                 break;
1014
1015         case LDAP_REQ_ADD:
1016                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
1017                 rc = do_add( op, &rs );
1018                 break;
1019
1020         case LDAP_REQ_DELETE:
1021                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
1022                 rc = do_delete( op, &rs );
1023                 break;
1024
1025         case LDAP_REQ_MODRDN:
1026                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
1027                 rc = do_modrdn( op, &rs );
1028                 break;
1029
1030         case LDAP_REQ_MODIFY:
1031                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
1032                 rc = do_modify( op, &rs );
1033                 break;
1034
1035         case LDAP_REQ_COMPARE:
1036                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
1037                 rc = do_compare( op, &rs );
1038                 break;
1039
1040         case LDAP_REQ_SEARCH:
1041                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
1042                 rc = do_search( op, &rs );
1043                 break;
1044
1045         case LDAP_REQ_ABANDON:
1046                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
1047                 rc = do_abandon( op, &rs );
1048                 break;
1049
1050         case LDAP_REQ_EXTENDED:
1051                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
1052                 rc = do_extended( op, &rs );
1053                 break;
1054
1055         default:
1056 #ifdef NEW_LOGGING
1057                 LDAP_LOG( CONNECTION, INFO,
1058                         "connection_operation: conn %lu unknown LDAP request 0x%lx\n",
1059                         conn->c_connid, tag, 0 );
1060 #else
1061                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1062                         tag, 0, 0 );
1063 #endif
1064                 op->o_tag = LBER_ERROR;
1065                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1066                 rs.sr_text = "unknown LDAP request";
1067                 send_ldap_disconnect( op, &rs );
1068                 rc = -1;
1069                 break;
1070         }
1071
1072 #ifdef SLAPD_MONITOR
1073         oldtag = tag;
1074 #endif /* SLAPD_MONITOR */
1075         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1076
1077 operations_error:
1078         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1079         num_ops_completed++;
1080 #ifdef SLAPD_MONITOR
1081         switch (oldtag) {
1082         case LDAP_REQ_BIND:
1083                 num_ops_completed_[SLAP_OP_BIND]++;
1084                 break;
1085         case LDAP_REQ_UNBIND:
1086                 num_ops_completed_[SLAP_OP_UNBIND]++;
1087                 break;
1088         case LDAP_REQ_ADD:
1089                 num_ops_completed_[SLAP_OP_ADD]++;
1090                 break;
1091         case LDAP_REQ_DELETE:
1092                 num_ops_completed_[SLAP_OP_DELETE]++;
1093                 break;
1094         case LDAP_REQ_MODRDN:
1095                 num_ops_completed_[SLAP_OP_MODRDN]++;
1096                 break;
1097         case LDAP_REQ_MODIFY:
1098                 num_ops_completed_[SLAP_OP_MODIFY]++;
1099                 break;
1100         case LDAP_REQ_COMPARE:
1101                 num_ops_completed_[SLAP_OP_COMPARE]++;
1102                 break;
1103         case LDAP_REQ_SEARCH:
1104                 num_ops_completed_[SLAP_OP_SEARCH]++;
1105                 break;
1106         case LDAP_REQ_ABANDON:
1107                 num_ops_completed_[SLAP_OP_ABANDON]++;
1108                 break;
1109         case LDAP_REQ_EXTENDED:
1110                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1111                 break;
1112         }
1113 #endif /* SLAPD_MONITOR */
1114         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1115
1116         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1117                 op->o_cancel = LDAP_TOO_LATE;
1118         }
1119
1120         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1121                 op->o_cancel != SLAP_CANCEL_DONE )
1122         {
1123                 ldap_pvt_thread_yield();
1124         }
1125
1126         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1127
1128         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1129
1130         if ( op->o_cancel != SLAP_CANCEL_ACK &&
1131                                 ( op->o_sync_mode & SLAP_SYNC_PERSIST ) ) {
1132                 slap_sl_mem_detach( ctx, memctx );
1133         } else if (( op->o_sync_slog_size != -1 )) {
1134                 slap_sl_mem_detach( ctx, memctx );
1135                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1136                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1137                 conn->c_n_ops_executing--;
1138                 conn->c_n_ops_completed++;
1139         } else {
1140                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1141                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1142                 slap_op_free( op );
1143                 conn->c_n_ops_executing--;
1144                 conn->c_n_ops_completed++;
1145         }
1146
1147         switch( tag ) {
1148         case LBER_ERROR:
1149         case LDAP_REQ_UNBIND:
1150                 /* c_mutex is locked */
1151                 connection_closing( conn );
1152                 break;
1153
1154         case LDAP_REQ_BIND:
1155                 conn->c_sasl_bind_in_progress =
1156                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1157
1158                 if( conn->c_conn_state == SLAP_C_BINDING) {
1159                         conn->c_conn_state = SLAP_C_ACTIVE;
1160                 }
1161         }
1162
1163         connection_resched( conn );
1164
1165         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1166
1167         return NULL;
1168 }
1169
1170 static const Listener dummy_list = { {0, ""}, {0, ""} };
1171
1172 int connection_client_setup(
1173         ber_socket_t s,
1174         ldap_pvt_thread_start_t *func,
1175         void *arg )
1176 {
1177         Connection *c;
1178
1179         if ( connection_init( s, (Listener *)&dummy_list, "", "", CONN_IS_CLIENT, 0, NULL ) < 0 ) {
1180                 return -1;
1181         }
1182
1183         c = connection_get( s );
1184         c->c_clientfunc = func;
1185         c->c_clientarg = arg;
1186         connection_return( c );
1187         slapd_add_internal( s, 0 );
1188         slapd_set_read( s, 1 );
1189         return 0;
1190 }
1191
1192 void connection_client_enable(
1193         ber_socket_t s
1194 )
1195 {
1196         slapd_set_read( s, 1 );
1197 }
1198
1199 void connection_client_stop(
1200         ber_socket_t s
1201 )
1202 {
1203         Connection *c;
1204
1205         /* get (locked) connection */
1206         c = connection_get( s );
1207
1208         assert( c->c_conn_state == SLAP_C_CLIENT );
1209
1210         c->c_listener = NULL;
1211         c->c_conn_state = SLAP_C_INVALID;
1212         c->c_struct_state = SLAP_C_UNUSED;
1213         connection_return( c );
1214         slapd_remove( s, 0, 1 );
1215 }
1216
1217 int connection_read(ber_socket_t s)
1218 {
1219         int rc = 0;
1220         Connection *c;
1221
1222         assert( connections != NULL );
1223
1224         ldap_pvt_thread_mutex_lock( &connections_mutex );
1225
1226         /* get (locked) connection */
1227         c = connection_get( s );
1228
1229         if( c == NULL ) {
1230 #ifdef NEW_LOGGING
1231                 LDAP_LOG( CONNECTION, INFO,
1232                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1233 #else
1234                 Debug( LDAP_DEBUG_ANY,
1235                         "connection_read(%ld): no connection!\n",
1236                         (long) s, 0, 0 );
1237 #endif
1238                 slapd_remove(s, 1, 0);
1239
1240                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1241                 return -1;
1242         }
1243
1244         c->c_n_read++;
1245
1246         if( c->c_conn_state == SLAP_C_CLOSING ) {
1247 #ifdef NEW_LOGGING
1248                 LDAP_LOG( CONNECTION, INFO,
1249                         "connection_read: conn %lu connection closing, ignoring input\n",
1250                         c->c_connid, 0, 0 );
1251 #else
1252                 Debug( LDAP_DEBUG_TRACE,
1253                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1254                         s, c->c_connid, 0 );
1255 #endif
1256                 connection_return( c );
1257                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1258                 return 0;
1259         }
1260
1261         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1262                 slapd_clr_read( s, 0 );
1263                 ldap_pvt_thread_pool_submit( &connection_pool,
1264                         c->c_clientfunc, c->c_clientarg );
1265                 connection_return( c );
1266                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1267                 return 0;
1268         }
1269
1270 #ifdef NEW_LOGGING
1271         LDAP_LOG( CONNECTION, DETAIL1,
1272                 "connection_read: conn %lu checking for input.\n",
1273                         c->c_connid, 0, 0 );
1274 #else
1275         Debug( LDAP_DEBUG_TRACE,
1276                 "connection_read(%d): checking for input on id=%lu\n",
1277                 s, c->c_connid, 0 );
1278 #endif
1279
1280 #ifdef HAVE_TLS
1281         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1282                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1283                 if ( rc < 0 ) {
1284 #if 0 /* required by next #if 0 */
1285                         struct timeval tv;
1286                         fd_set rfd;
1287 #endif
1288
1289 #ifdef NEW_LOGGING
1290                         LDAP_LOG( CONNECTION, ERR,
1291                                 "connection_read: conn %lu TLS accept error, error %d\n",
1292                                 c->c_connid, rc, 0 );
1293 #else
1294                         Debug( LDAP_DEBUG_TRACE,
1295                                 "connection_read(%d): TLS accept error "
1296                                 "error=%d id=%lu, closing\n",
1297                                 s, rc, c->c_connid );
1298 #endif
1299                         c->c_needs_tls_accept = 0;
1300                         /* connections_mutex and c_mutex are locked */
1301                         connection_closing( c );
1302
1303 #if 0
1304                         /* Drain input before close, to allow SSL error codes
1305                          * to propagate to client. */
1306                         FD_ZERO(&rfd);
1307                         FD_SET(s, &rfd);
1308                         for (rc=1; rc>0;) {
1309                                 tv.tv_sec = 1;
1310                                 tv.tv_usec = 0;
1311                                 rc = select(s+1, &rfd, NULL, NULL, &tv);
1312                                 if (rc == 1) {
1313                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1314                                 }
1315                         }
1316 #endif
1317                         connection_close( c );
1318
1319                 } else if ( rc == 0 ) {
1320                         void *ssl;
1321                         struct berval authid = BER_BVNULL;
1322
1323                         c->c_needs_tls_accept = 0;
1324
1325                         /* we need to let SASL know */
1326                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1327
1328                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1329                         if( c->c_tls_ssf > c->c_ssf ) {
1330                                 c->c_ssf = c->c_tls_ssf;
1331                         }
1332
1333                         rc = dnX509peerNormalize( ssl, &authid );
1334                         if ( rc != LDAP_SUCCESS ) {
1335 #ifdef NEW_LOGGING
1336                                 LDAP_LOG( CONNECTION, INFO,
1337                                         "connection_read: conn %lu unable to get TLS client DN, "
1338                                         "error %d\n", c->c_connid, rc, 0 );
1339 #else
1340                                 Debug( LDAP_DEBUG_TRACE,
1341                                 "connection_read(%d): unable to get TLS client DN "
1342                                 "error=%d id=%lu\n",
1343                                 s, rc, c->c_connid );
1344 #endif
1345                         }
1346                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1347                         if ( authid.bv_val ) free( authid.bv_val );
1348                 }
1349
1350                 /* if success and data is ready, fall thru to data input loop */
1351                 if( rc != 0 ||
1352                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1353                 {
1354                         connection_return( c );
1355                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1356                         return 0;
1357                 }
1358         }
1359 #endif
1360
1361 #ifdef HAVE_CYRUS_SASL
1362         if ( c->c_sasl_layers ) {
1363                 /* If previous layer is not removed yet, give up for now */
1364                 if ( !c->c_sasl_sockctx ) {
1365                         connection_return( c );
1366                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1367                         return 0;
1368                 }
1369
1370                 c->c_sasl_layers = 0;
1371
1372                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1373
1374                 if( rc != LDAP_SUCCESS ) {
1375 #ifdef NEW_LOGGING
1376                         LDAP_LOG( CONNECTION, ERR,
1377                                 "connection_read: conn %lu SASL install error %d, closing\n",
1378                                 c->c_connid, rc, 0 );
1379 #else
1380                         Debug( LDAP_DEBUG_TRACE,
1381                                 "connection_read(%d): SASL install error "
1382                                 "error=%d id=%lu, closing\n",
1383                                 s, rc, c->c_connid );
1384 #endif
1385                         /* connections_mutex and c_mutex are locked */
1386                         connection_closing( c );
1387                         connection_close( c );
1388                         connection_return( c );
1389                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1390                         return 0;
1391                 }
1392         }
1393 #endif
1394
1395 #define CONNECTION_INPUT_LOOP 1
1396 /* #define      DATA_READY_LOOP 1 */
1397
1398         do {
1399                 /* How do we do this without getting into a busy loop ? */
1400                 rc = connection_input( c );
1401         }
1402 #ifdef DATA_READY_LOOP
1403         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1404 #elif CONNECTION_INPUT_LOOP
1405         while(!rc);
1406 #else
1407         while(0);
1408 #endif
1409
1410         if( rc < 0 ) {
1411 #ifdef NEW_LOGGING
1412                 LDAP_LOG( CONNECTION, ERR,
1413                         "connection_read: conn %lu input error %d, closing.\n",
1414                         c->c_connid, rc, 0 );
1415 #else
1416                 Debug( LDAP_DEBUG_TRACE,
1417                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1418                         s, rc, c->c_connid );
1419 #endif
1420                 /* connections_mutex and c_mutex are locked */
1421                 connection_closing( c );
1422                 connection_close( c );
1423                 connection_return( c );
1424                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1425                 return 0;
1426         }
1427
1428         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1429                 slapd_set_read( s, 1 );
1430         }
1431
1432         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1433                 slapd_set_write( s, 1 );
1434         }
1435
1436         connection_return( c );
1437         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1438         return 0;
1439 }
1440
1441 static int
1442 connection_input(
1443         Connection *conn )
1444 {
1445         Operation *op;
1446         ber_tag_t       tag;
1447         ber_len_t       len;
1448         ber_int_t       msgid;
1449         BerElement      *ber;
1450         int             rc;
1451 #ifdef LDAP_CONNECTIONLESS
1452         Sockaddr        peeraddr;
1453         char            *cdn = NULL;
1454 #endif
1455         char *defer = NULL;
1456
1457         if ( conn->c_currentber == NULL &&
1458                 ( conn->c_currentber = ber_alloc()) == NULL )
1459         {
1460 #ifdef NEW_LOGGING
1461                 LDAP_LOG( CONNECTION, ERR,
1462                         "connection_input: conn %lu ber_alloc failed.\n",
1463                         conn->c_connid, 0, 0 );
1464 #else
1465                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1466 #endif
1467                 return -1;
1468         }
1469
1470         errno = 0;
1471
1472 #ifdef LDAP_CONNECTIONLESS
1473         if ( conn->c_is_udp ) {
1474                 char    peername[sizeof("IP=255.255.255.255:65336")];
1475                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1476                         sizeof(struct sockaddr));
1477                 if (len != sizeof(struct sockaddr))
1478                         return 1;
1479                 sprintf( peername, "IP=%s:%d",
1480                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1481                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1482                 Statslog( LDAP_DEBUG_STATS,
1483                         "conn=%lu UDP request from %s (%s) accepted.\n",
1484                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1485         }
1486 #endif
1487         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1488         if ( tag != LDAP_TAG_MESSAGE ) {
1489                 int err = errno;
1490                 ber_socket_t    sd;
1491
1492                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1493
1494 #ifdef NEW_LOGGING
1495                 LDAP_LOG( CONNECTION, ERR,
1496                         "connection_input: conn %lu ber_get_next failed, errno %d (%s).\n",
1497                         conn->c_connid, err, sock_errstr(err) );
1498 #else
1499                 Debug( LDAP_DEBUG_TRACE,
1500                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1501                         sd, err, sock_errstr(err) );
1502 #endif
1503                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1504                         /* log, close and send error */
1505                         ber_free( conn->c_currentber, 1 );
1506                         conn->c_currentber = NULL;
1507
1508                         return -2;
1509                 }
1510                 return 1;
1511         }
1512
1513         ber = conn->c_currentber;
1514         conn->c_currentber = NULL;
1515
1516         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1517                 /* log, close and send error */
1518 #ifdef NEW_LOGGING
1519                 LDAP_LOG( CONNECTION, ERR,
1520                         "connection_input: conn %lu ber_get_int returns 0x%lx.\n",
1521                         conn->c_connid, tag, 0 );
1522 #else
1523                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n",
1524                         tag, 0, 0 );
1525 #endif
1526                 ber_free( ber, 1 );
1527                 return -1;
1528         }
1529
1530         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1531                 /* log, close and send error */
1532 #ifdef NEW_LOGGING
1533                 LDAP_LOG( CONNECTION, ERR,
1534                         "connection_input: conn %lu ber_peek_tag returns 0x%lx.\n",
1535                         conn->c_connid, tag, 0 );
1536 #else
1537                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n",
1538                         tag, 0, 0 );
1539 #endif
1540                 ber_free( ber, 1 );
1541
1542                 return -1;
1543         }
1544
1545 #ifdef LDAP_CONNECTIONLESS
1546         if( conn->c_is_udp ) {
1547                 if( tag == LBER_OCTETSTRING ) {
1548                         ber_get_stringa( ber, &cdn );
1549                         tag = ber_peek_tag(ber, &len);
1550                 }
1551                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1552 #ifdef NEW_LOGGING
1553                         LDAP_LOG( CONNECTION, ERR,
1554                                 "connection_input: conn %lu invalid req for UDP 0x%lx.\n",
1555                                 conn->c_connid, tag, 0 );
1556 #else
1557                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1558 #endif
1559                         ber_free( ber, 1 );
1560                         return 0;
1561                 }
1562         }
1563 #endif
1564         if(tag == LDAP_REQ_BIND) {
1565                 /* immediately abandon all exiting operations upon BIND */
1566                 connection_abandon( conn );
1567         }
1568
1569         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1570
1571         op->o_conn = conn;
1572         op->o_assertion = NULL;
1573         op->o_preread_attrs = NULL;
1574         op->o_postread_attrs = NULL;
1575         op->o_vrFilter = NULL;
1576         op->o_pagedresults_state = conn->c_pagedresults_state;
1577
1578         op->o_res_ber = NULL;
1579
1580 #ifdef LDAP_CONNECTIONLESS
1581         if (conn->c_is_udp) {
1582                 if ( cdn ) {
1583                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1584                         op->o_protocol = LDAP_VERSION2;
1585                 }
1586                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1587                 if (op->o_res_ber == NULL) return 1;
1588
1589                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1590                         sizeof(struct sockaddr), 0 );
1591
1592                 if (rc != sizeof(struct sockaddr)) {
1593 #ifdef NEW_LOGGING
1594                         LDAP_LOG( CONNECTION, INFO,
1595                                 "connection_input: conn %lu ber_write failed\n",
1596                                 conn->c_connid, 0, 0 );
1597 #else
1598                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1599 #endif
1600                         return 1;
1601                 }
1602
1603                 if (op->o_protocol == LDAP_VERSION2) {
1604                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1605                         if (rc == -1) {
1606 #ifdef NEW_LOGGING
1607                                 LDAP_LOG( CONNECTION, INFO,
1608                                         "connection_input: conn %lu put outer sequence failed\n",
1609                                         conn->c_connid, 0, 0 );
1610 #else
1611                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1612 #endif
1613                                 return rc;
1614                         }
1615                 }
1616         }
1617 #endif /* LDAP_CONNECTIONLESS */
1618
1619         rc = 0;
1620
1621         /* Don't process requests when the conn is in the middle of a
1622          * Bind, or if it's closing. Also, don't let any single conn
1623          * use up all the available threads, and don't execute if we're
1624          * currently blocked on output. And don't execute if there are
1625          * already pending ops, let them go first.  Abandon operations
1626          * get exceptions to some, but not all, cases.
1627          */
1628         if (tag != LDAP_REQ_ABANDON && conn->c_conn_state == SLAP_C_CLOSING) {
1629                 defer = "closing";
1630         } else if (tag != LDAP_REQ_ABANDON && conn->c_writewaiter) {
1631                 defer = "awaiting write";
1632         } else if (conn->c_n_ops_executing >= connection_pool_max/2) {
1633                 defer = "too many executing";
1634         } else if (conn->c_conn_state == SLAP_C_BINDING) {
1635                 defer = "binding";
1636         } else if (tag != LDAP_REQ_ABANDON && conn->c_n_ops_pending) {
1637                 defer = "pending operations";
1638         }
1639
1640         if( defer ) {
1641                 int max = conn->c_dn.bv_len
1642                         ? slap_conn_max_pending_auth
1643                         : slap_conn_max_pending;
1644
1645 #ifdef NEW_LOGGING
1646                 LDAP_LOG( CONNECTION, INFO,
1647                         "connection_input: conn %lu deferring operation: %s\n",
1648                         conn->c_connid, defer, 0 );
1649 #else
1650                 Debug( LDAP_DEBUG_ANY,
1651                         "connection_input: conn=%lu deferring operation: %s\n",
1652                         conn->c_connid, defer, 0 );
1653 #endif
1654                 conn->c_n_ops_pending++;
1655                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1656                 if ( conn->c_n_ops_pending > max ) {
1657                         rc = -1;
1658                 } else {
1659                         rc = 1;
1660                 }
1661         } else {
1662                 conn->c_n_ops_executing++;
1663                 connection_op_activate( op );
1664         }
1665
1666 #ifdef NO_THREADS
1667         if ( conn->c_struct_state != SLAP_C_USED ) {
1668                 /* connection must have got closed underneath us */
1669                 return 1;
1670         }
1671 #endif
1672         assert( conn->c_struct_state == SLAP_C_USED );
1673
1674         return rc;
1675 }
1676
1677 static int
1678 connection_resched( Connection *conn )
1679 {
1680         Operation *op;
1681
1682         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1683                 int rc;
1684                 ber_socket_t    sd;
1685                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1686
1687                 /* us trylock to avoid possible deadlock */
1688                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1689
1690                 if( rc ) {
1691 #ifdef NEW_LOGGING
1692                         LDAP_LOG( CONNECTION, DETAIL1,
1693                                 "connection_resched: conn %lu reaquiring locks.\n",
1694                                 conn->c_connid, 0, 0 );
1695 #else
1696                         Debug( LDAP_DEBUG_TRACE,
1697                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1698                                 conn->c_connid, sd, 0 );
1699 #endif
1700                         /*
1701                          * reaquire locks in the right order...
1702                          * this may allow another thread to close this connection,
1703                          * so recheck state below.
1704                          */
1705                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1706                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1707                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1708                 }
1709
1710                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1711 #ifdef NEW_LOGGING
1712                         LDAP_LOG( CONNECTION, INFO,
1713                                 "connection_resched: conn %lu closed by other thread.\n",
1714                                 conn->c_connid, 0, 0 );
1715 #else
1716                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1717                                 "closed by other thread conn=%lu sd=%d\n",
1718                                 conn->c_connid, sd, 0 );
1719 #endif
1720                 } else {
1721 #ifdef NEW_LOGGING
1722                         LDAP_LOG( CONNECTION, DETAIL1,
1723                                 "connection_resched: conn %lu attempting closing.\n",
1724                                 conn->c_connid, 0, 0 );
1725 #else
1726                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1727                                 "attempting closing conn=%lu sd=%d\n",
1728                                 conn->c_connid, sd, 0 );
1729 #endif
1730                         connection_close( conn );
1731                 }
1732
1733                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1734                 return 0;
1735         }
1736
1737         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1738                 /* other states need different handling */
1739                 return 0;
1740         }
1741
1742         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1743                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1744                         break;
1745                 }
1746                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1747                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1748                 /* pending operations should not be marked for abandonment */
1749                 assert(!op->o_abandon);
1750
1751                 conn->c_n_ops_pending--;
1752                 conn->c_n_ops_executing++;
1753
1754                 connection_op_activate( op );
1755
1756                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1757                         break;
1758                 }
1759         }
1760         return 0;
1761 }
1762
1763 static int connection_op_activate( Operation *op )
1764 {
1765         int status;
1766         ber_tag_t tag = op->o_tag;
1767
1768         if(tag == LDAP_REQ_BIND) {
1769                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1770         }
1771
1772         if (!op->o_dn.bv_len) {
1773                 op->o_authz = op->o_conn->c_authz;
1774                 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1775                 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1776         }
1777         op->o_authtype = op->o_conn->c_authtype;
1778         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1779
1780         if (!op->o_protocol) {
1781                 op->o_protocol = op->o_conn->c_protocol
1782                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1783         }
1784         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1785                 && op->o_protocol > LDAP_VERSION2)
1786         {
1787                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1788         }
1789
1790         op->o_connid = op->o_conn->c_connid;
1791
1792         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1793
1794         status = ldap_pvt_thread_pool_submit( &connection_pool,
1795                 connection_operation, (void *) op );
1796
1797         if ( status != 0 ) {
1798 #ifdef NEW_LOGGING
1799                 LDAP_LOG( CONNECTION, ERR,
1800                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1801                         op->o_connid, 0, 0 );
1802 #else
1803                 Debug( LDAP_DEBUG_ANY,
1804                         "ldap_pvt_thread_pool_submit: failed (%d) for conn=%lu\n",
1805                         status, op->o_connid, 0 );
1806 #endif
1807                 /* should move op to pending list */
1808         }
1809
1810         return status;
1811 }
1812
1813 int connection_write(ber_socket_t s)
1814 {
1815         Connection *c;
1816
1817         assert( connections != NULL );
1818
1819         ldap_pvt_thread_mutex_lock( &connections_mutex );
1820
1821         c = connection_get( s );
1822
1823         slapd_clr_write( s, 0);
1824
1825         if( c == NULL ) {
1826 #ifdef NEW_LOGGING
1827                 LDAP_LOG( CONNECTION, ERR,
1828                         "connection_write: sock %ld no connection!\n", (long)s, 0, 0);
1829 #else
1830                 Debug( LDAP_DEBUG_ANY,
1831                         "connection_write(%ld): no connection!\n",
1832                         (long)s, 0, 0 );
1833 #endif
1834                 slapd_remove(s, 1, 0);
1835                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1836                 return -1;
1837         }
1838
1839         c->c_n_write++;
1840
1841 #ifdef NEW_LOGGING
1842         LDAP_LOG( CONNECTION, DETAIL1,
1843                 "connection_write conn %lu waking output.\n", c->c_connid, 0, 0 );
1844 #else
1845         Debug( LDAP_DEBUG_TRACE,
1846                 "connection_write(%d): waking output for id=%lu\n",
1847                 s, c->c_connid, 0 );
1848 #endif
1849         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1850
1851         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1852                 slapd_set_read( s, 1 );
1853         }
1854         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1855                 slapd_set_write( s, 1 );
1856         }
1857         connection_return( c );
1858         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1859         return 0;
1860 }
1861
1862 void
1863 connection_fake_init(
1864         Connection *conn,
1865         Operation *op,
1866         void *ctx )
1867 {
1868         conn->c_connid = -1;
1869         conn->c_send_ldap_result = slap_send_ldap_result;
1870         conn->c_send_search_entry = slap_send_search_entry;
1871         conn->c_send_search_reference = slap_send_search_reference;
1872         conn->c_listener = (Listener *)&dummy_list;
1873         conn->c_peer_name = slap_empty_bv;
1874
1875         /* set memory context */
1876         op->o_tmpmemctx = slap_sl_mem_create( SLAP_SLAB_SIZE, ctx );
1877         op->o_tmpmfuncs = &slap_sl_mfuncs;
1878         op->o_threadctx = ctx;
1879
1880         op->o_conn = conn;
1881         op->o_connid = op->o_conn->c_connid;
1882
1883         op->o_time = slap_get_time();
1884 }