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