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                 BER_BVZERO( &c->c_authmech );
 467                 BER_BVZERO( &c->c_dn );
 468                 BER_BVZERO( &c->c_ndn );
 469
 470                 c->c_listener = NULL;
 471                 BER_BVZERO( &c->c_peer_domain );
 472                 BER_BVZERO( &c->c_peer_name );
 473
 474                 LDAP_STAILQ_INIT(&c->c_ops);
 475                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 476
 477                 BER_BVZERO( &c->c_sasl_bind_mech );
 478                 c->c_sasl_done = 0;
 479                 c->c_sasl_authctx = NULL;
 480                 c->c_sasl_sockctx = NULL;
 481                 c->c_sasl_extra = NULL;
 482                 c->c_sasl_bindop = NULL;
 483
 484                 c->c_sb = ber_sockbuf_alloc( );
 485
 486                 {
 487                         ber_len_t max = sockbuf_max_incoming;
 488                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 489                 }
 490
 491                 c->c_currentber = NULL;
 492
 493                 /* should check status of thread calls */
 494                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 495                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 496                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 497
 498 #ifdef LDAP_SLAPI
 499                 if ( slapi_plugins_used ) {
 500                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 501                 }
 502 #endif
 503
 504                 c->c_struct_state = SLAP_C_UNUSED;
 505         }
 506
 507         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 508
 509         assert( c->c_struct_state == SLAP_C_UNUSED );
 510         assert( BER_BVISNULL( &c->c_authmech ) );
 511         assert( BER_BVISNULL( &c->c_dn ) );
 512         assert( BER_BVISNULL( &c->c_ndn ) );
 513         assert( c->c_listener == NULL );
 514         assert( BER_BVISNULL( &c->c_peer_domain ) );
 515         assert( BER_BVISNULL( &c->c_peer_name ) );
 516         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 517         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 518         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 519         assert( c->c_sasl_done == 0 );
 520         assert( c->c_sasl_authctx == NULL );
 521         assert( c->c_sasl_sockctx == NULL );
 522         assert( c->c_sasl_extra == NULL );
 523         assert( c->c_sasl_bindop == NULL );
 524         assert( c->c_currentber == NULL );
 525         assert( c->c_writewaiter == 0);
 526
 527         c->c_listener = listener;
 528
 529         if ( flags == CONN_IS_CLIENT ) {
 530                 c->c_conn_state = SLAP_C_CLIENT;
 531                 c->c_struct_state = SLAP_C_USED;
 532                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
 533                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 534                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 535
 536                 return 0;
 537         }
 538
 539         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 540         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 541
 542         c->c_n_ops_received = 0;
 543         c->c_n_ops_executing = 0;
 544         c->c_n_ops_pending = 0;
 545         c->c_n_ops_completed = 0;
 546
 547         c->c_n_get = 0;
 548         c->c_n_read = 0;
 549         c->c_n_write = 0;
 550
 551         /* set to zero until bind, implies LDAP_VERSION3 */
 552         c->c_protocol = 0;
 553
 554 #ifdef SLAPD_MONITOR
 555         c->c_activitytime = c->c_starttime = slap_get_time();
 556 #else
 557         if( global_idletimeout > 0 ) {
 558                 c->c_activitytime = c->c_starttime = slap_get_time();
 559         }
 560 #endif
 561
 562 #ifdef LDAP_CONNECTIONLESS
 563         c->c_is_udp = 0;
 564         if( flags == CONN_IS_UDP ) {
 565                 c->c_is_udp = 1;
 566 #ifdef LDAP_DEBUG
 567                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 568                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 569 #endif
 570                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 571                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 572                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 573                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 574         } else
 575 #endif
 576         {
 577 #ifdef LDAP_DEBUG
 578                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 579                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 580 #endif
 581                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 582                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 583         }
 584
 585 #ifdef LDAP_DEBUG
 586         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 587                 INT_MAX, (void*)"ldap_" );
 588 #endif
 589
 590         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 591                 c /* non-NULL */ ) < 0 )
 592         {
 593 #ifdef NEW_LOGGING
 594                 LDAP_LOG( CONNECTION, INFO,
 595                         "connection_init: conn %lu set nonblocking failed\n",
 596                         c->c_connid, 0, 0 );
 597 #else
 598                 Debug( LDAP_DEBUG_ANY,
 599                         "connection_init(%d, %s): set nonblocking failed\n",
 600                         s, c->c_peer_name.bv_val, 0 );
 601 #endif
 602         }
 603
 604         id = c->c_connid = conn_nextid++;
 605
 606         c->c_conn_state = SLAP_C_INACTIVE;
 607         c->c_struct_state = SLAP_C_USED;
 608
 609         c->c_ssf = c->c_transport_ssf = ssf;
 610         c->c_tls_ssf = 0;
 611
 612 #ifdef HAVE_TLS
 613         if ( flags == CONN_IS_TLS ) {
 614                 c->c_is_tls = 1;
 615                 c->c_needs_tls_accept = 1;
 616         } else {
 617                 c->c_is_tls = 0;
 618                 c->c_needs_tls_accept = 0;
 619         }
 620 #endif
 621
 622         slap_sasl_open( c, 0 );
 623         slap_sasl_external( c, ssf, authid );
 624
 625         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 626         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 627
 628         backend_connection_init(c);
 629
 630         return id;
 631 }
 632
 633 void connection2anonymous( Connection *c )
 634 {
 635         assert( connections != NULL );
 636         assert( c != NULL );
 637
 638         {
 639                 ber_len_t max = sockbuf_max_incoming;
 640                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 641         }
 642
 643         if(c->c_authmech.bv_val != NULL ) {
 644                 free(c->c_authmech.bv_val);
 645         }
 646         BER_BVZERO( &c->c_authmech );
 647
 648         if(c->c_dn.bv_val != NULL) {
 649                 free(c->c_dn.bv_val);
 650         }
 651         BER_BVZERO( &c->c_dn );
 652         if(c->c_ndn.bv_val != NULL) {
 653                 free(c->c_ndn.bv_val);
 654         }
 655         BER_BVZERO( &c->c_ndn );
 656
 657         c->c_authz_backend = NULL;
 658 }
 659
 660 static void
 661 connection_destroy( Connection *c )
 662 {
 663         /* note: connections_mutex should be locked by caller */
 664         ber_socket_t    sd;
 665         unsigned long   connid;
 666
 667         assert( connections != NULL );
 668         assert( c != NULL );
 669         assert( c->c_struct_state != SLAP_C_UNUSED );
 670         assert( c->c_conn_state != SLAP_C_INVALID );
 671         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 672         assert( c->c_writewaiter == 0);
 673
 674         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 675         connid = c->c_connid;
 676
 677         backend_connection_destroy(c);
 678
 679         c->c_protocol = 0;
 680         c->c_connid = -1;
 681
 682         c->c_activitytime = c->c_starttime = 0;
 683
 684         connection2anonymous( c );
 685         c->c_listener = NULL;
 686
 687         if(c->c_peer_domain.bv_val != NULL) {
 688                 free(c->c_peer_domain.bv_val);
 689         }
 690         BER_BVZERO( &c->c_peer_domain );
 691         if(c->c_peer_name.bv_val != NULL) {
 692                 free(c->c_peer_name.bv_val);
 693         }
 694         BER_BVZERO( &c->c_peer_name );
 695
 696         c->c_sasl_bind_in_progress = 0;
 697         if(c->c_sasl_bind_mech.bv_val != NULL) {
 698                 free(c->c_sasl_bind_mech.bv_val);
 699         }
 700         BER_BVZERO( &c->c_sasl_bind_mech );
 701
 702         slap_sasl_close( c );
 703
 704         if ( c->c_currentber != NULL ) {
 705                 ber_free( c->c_currentber, 1 );
 706                 c->c_currentber = NULL;
 707         }
 708
 709         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 710         if ( sd != AC_SOCKET_INVALID ) {
 711                 slapd_remove( sd, 1, 0 );
 712
 713                 Statslog( LDAP_DEBUG_STATS,
 714                         "conn=%lu fd=%ld closed\n",
 715                         connid, (long) sd, 0, 0, 0 );
 716         }
 717
 718         ber_sockbuf_free( c->c_sb );
 719
 720         c->c_sb = ber_sockbuf_alloc( );
 721
 722         {
 723                 ber_len_t max = sockbuf_max_incoming;
 724                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 725         }
 726
 727         c->c_conn_state = SLAP_C_INVALID;
 728         c->c_struct_state = SLAP_C_UNUSED;
 729
 730 #ifdef LDAP_SLAPI
 731         /* call destructors, then constructors; avoids unnecessary allocation */
 732         if ( slapi_plugins_used ) {
 733                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 734         }
 735 #endif
 736 }
 737
 738 int connection_state_closing( Connection *c )
 739 {
 740         /* c_mutex must be locked by caller */
 741
 742         int state;
 743         assert( c != NULL );
 744         assert( c->c_struct_state == SLAP_C_USED );
 745
 746         state = c->c_conn_state;
 747
 748         assert( state != SLAP_C_INVALID );
 749
 750         return state == SLAP_C_CLOSING;
 751 }
 752
 753 static void connection_abandon( Connection *c )
 754 {
 755         /* c_mutex must be locked by caller */
 756
 757         Operation *o;
 758
 759         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 760                 o->o_abandon = 1;
 761         }
 762
 763         /* remove pending operations */
 764         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 765                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 766                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 767                 slap_op_free( o );
 768         }
 769 }
 770
 771 void connection_closing( Connection *c )
 772 {
 773         assert( connections != NULL );
 774         assert( c != NULL );
 775         assert( c->c_struct_state == SLAP_C_USED );
 776         assert( c->c_conn_state != SLAP_C_INVALID );
 777
 778         /* c_mutex must be locked by caller */
 779
 780         if( c->c_conn_state != SLAP_C_CLOSING ) {
 781                 ber_socket_t    sd;
 782
 783                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 784 #ifdef NEW_LOGGING
 785                 LDAP_LOG( CONNECTION, DETAIL1,
 786                         "connection_closing: conn %lu readying socket %d for close.\n",
 787                         c->c_connid, sd, 0 );
 788 #else
 789                 Debug( LDAP_DEBUG_TRACE,
 790                         "connection_closing: readying conn=%lu sd=%d for close\n",
 791                         c->c_connid, sd, 0 );
 792 #endif
 793                 /* update state to closing */
 794                 c->c_conn_state = SLAP_C_CLOSING;
 795
 796                 /* don't listen on this port anymore */
 797                 slapd_clr_read( sd, 1 );
 798
 799                 /* abandon active operations */
 800                 connection_abandon( c );
 801
 802                 /* wake write blocked operations */
 803                 slapd_clr_write( sd, 1 );
 804                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 805         }
 806 }
 807
 808 static void connection_close( Connection *c )
 809 {
 810         ber_socket_t    sd;
 811
 812         assert( connections != NULL );
 813         assert( c != NULL );
 814         assert( c->c_struct_state == SLAP_C_USED );
 815         assert( c->c_conn_state == SLAP_C_CLOSING );
 816
 817         /* note: connections_mutex and c_mutex should be locked by caller */
 818
 819         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 820         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 821 #ifdef NEW_LOGGING
 822                 LDAP_LOG( CONNECTION, DETAIL1,
 823                         "connection_close: conn %lu deferring sd %d\n",
 824                                 c->c_connid, sd, 0 );
 825 #else
 826                 Debug( LDAP_DEBUG_TRACE,
 827                         "connection_close: deferring conn=%lu sd=%d\n",
 828                         c->c_connid, sd, 0 );
 829 #endif
 830                 return;
 831         }
 832
 833 #ifdef NEW_LOGGING
 834         LDAP_LOG( CONNECTION, RESULTS,
 835                 "connection_close: conn %lu sd %d\n", c->c_connid, sd, 0 );
 836 #else
 837         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 838                 c->c_connid, sd, 0 );
 839 #endif
 840         connection_destroy( c );
 841 }
 842
 843 unsigned long connections_nextid(void)
 844 {
 845         unsigned long id;
 846         assert( connections != NULL );
 847
 848         ldap_pvt_thread_mutex_lock( &connections_mutex );
 849
 850         id = conn_nextid;
 851
 852         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 853
 854         return id;
 855 }
 856
 857 Connection* connection_first( ber_socket_t *index )
 858 {
 859         assert( connections != NULL );
 860         assert( index != NULL );
 861
 862         ldap_pvt_thread_mutex_lock( &connections_mutex );
 863
 864         *index = 0;
 865
 866         return connection_next(NULL, index);
 867 }
 868
 869 Connection* connection_next( Connection *c, ber_socket_t *index )
 870 {
 871         assert( connections != NULL );
 872         assert( index != NULL );
 873         assert( *index <= dtblsize );
 874
 875         if( c != NULL ) {
 876                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 877         }
 878
 879         c = NULL;
 880
 881         for(; *index < dtblsize; (*index)++) {
 882                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 883                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 884 #ifndef HAVE_WINSOCK
 885                         continue;
 886 #else
 887                         break;
 888 #endif
 889                 }
 890
 891                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 892                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 893                         c = &connections[(*index)++];
 894                         break;
 895                 }
 896
 897                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 898                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 899         }
 900
 901         if( c != NULL ) {
 902                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 903         }
 904
 905         return c;
 906 }
 907
 908 void connection_done( Connection *c )
 909 {
 910         assert( connections != NULL );
 911
 912         if( c != NULL ) {
 913                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 914         }
 915
 916         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 917 }
 918
 919 /*
 920  * connection_activity - handle the request operation op on connection
 921  * conn.  This routine figures out what kind of operation it is and
 922  * calls the appropriate stub to handle it.
 923  */
 924
 925 #ifdef SLAPD_MONITOR
 926 #define INCR_OP(var,index) \
 927         do { \
 928                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 929                 (var)[(index)]++; \
 930                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 931         } while (0)
 932 #else /* !SLAPD_MONITOR */
 933 #define INCR_OP(var,index)
 934 #endif /* !SLAPD_MONITOR */
 935
 936 static void *
 937 connection_operation( void *ctx, void *arg_v )
 938 {
 939         int rc = LDAP_OTHER;
 940         Operation *op = arg_v;
 941         SlapReply rs = {REP_RESULT};
 942         ber_tag_t tag = op->o_tag;
 943 #ifdef SLAPD_MONITOR
 944         ber_tag_t oldtag = tag;
 945 #endif /* SLAPD_MONITOR */
 946         Connection *conn = op->o_conn;
 947         void *memctx = NULL;
 948         void *memctx_null = NULL;
 949         ber_len_t memsiz;
 950
 951         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 952         num_ops_initiated++;
 953         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 954
 955         op->o_threadctx = ctx;
 956
 957         switch ( tag ) {
 958         case LDAP_REQ_BIND:
 959         case LDAP_REQ_UNBIND:
 960         case LDAP_REQ_ADD:
 961         case LDAP_REQ_DELETE:
 962         case LDAP_REQ_MODRDN:
 963         case LDAP_REQ_MODIFY:
 964         case LDAP_REQ_COMPARE:
 965         case LDAP_REQ_SEARCH:
 966         case LDAP_REQ_ABANDON:
 967         case LDAP_REQ_EXTENDED:
 968                 break;
 969         default:
 970 #ifdef NEW_LOGGING
 971                 LDAP_LOG( CONNECTION, INFO, "connection_operation: "
 972                         "conn %lu unknown LDAP request 0x%lx\n",
 973                         conn->c_connid, tag, 0 );
 974 #else
 975                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 976                         "conn %lu unknown LDAP request 0x%lx\n",
 977                         conn->c_connid, tag, 0 );
 978 #endif
 979                 op->o_tag = LBER_ERROR;
 980                 rs.sr_err = LDAP_PROTOCOL_ERROR;
 981                 rs.sr_text = "unknown LDAP request";
 982                 send_ldap_disconnect( op, &rs );
 983                 rc = SLAPD_DISCONNECT;
 984                 goto operations_error;
 985         }
 986
 987         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 988 #ifdef NEW_LOGGING
 989                 LDAP_LOG( CONNECTION, ERR,
 990                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 991                         conn->c_connid, (long)tag, 0 );
 992 #else
 993                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 994                         "error: SASL bind in progress (tag=%ld).\n",
 995                         (long) tag, 0, 0 );
 996 #endif
 997                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 998                         "SASL bind in progress" );
 999                 rc = LDAP_OPERATIONS_ERROR;
1000                 goto operations_error;
1001         }
1002
1003         /* We can use Thread-Local storage for most mallocs. We can
1004          * also use TL for ber parsing, but not on Add or Modify.
1005          */
1006 #if 0
1007         memsiz = ber_len( op->o_ber ) * 64;
1008         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1009 #endif
1010         memsiz = SLAP_SLAB_SIZE;
1011
1012         memctx = slap_sl_mem_create( memsiz, ctx );
1013         op->o_tmpmemctx = memctx;
1014         op->o_tmpmfuncs = &slap_sl_mfuncs;
1015         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1016                 /* Note - the ber and its buffer are already allocated from
1017                  * regular memory; this only affects subsequent mallocs that
1018                  * ber_scanf may invoke.
1019                  */
1020                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1021         }
1022
1023         switch ( tag ) {
1024         case LDAP_REQ_BIND:
1025                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
1026                 rc = do_bind( op, &rs );
1027                 break;
1028
1029         case LDAP_REQ_UNBIND:
1030                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
1031                 rc = do_unbind( op, &rs );
1032                 break;
1033
1034         case LDAP_REQ_ADD:
1035                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
1036                 rc = do_add( op, &rs );
1037                 break;
1038
1039         case LDAP_REQ_DELETE:
1040                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
1041                 rc = do_delete( op, &rs );
1042                 break;
1043
1044         case LDAP_REQ_MODRDN:
1045                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
1046                 rc = do_modrdn( op, &rs );
1047                 break;
1048
1049         case LDAP_REQ_MODIFY:
1050                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
1051                 rc = do_modify( op, &rs );
1052                 break;
1053
1054         case LDAP_REQ_COMPARE:
1055                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
1056                 rc = do_compare( op, &rs );
1057                 break;
1058
1059         case LDAP_REQ_SEARCH:
1060                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
1061                 rc = do_search( op, &rs );
1062                 break;
1063
1064         case LDAP_REQ_ABANDON:
1065                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
1066                 rc = do_abandon( op, &rs );
1067                 break;
1068
1069         case LDAP_REQ_EXTENDED:
1070                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
1071                 rc = do_extended( op, &rs );
1072                 break;
1073
1074         default:
1075                 /* not reachable */
1076                 assert( 0 );
1077         }
1078
1079 operations_error:
1080         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1081
1082         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1083
1084         num_ops_completed++;
1085 #ifdef SLAPD_MONITOR
1086         switch (oldtag) {
1087         case LDAP_REQ_BIND:
1088                 num_ops_completed_[SLAP_OP_BIND]++;
1089                 break;
1090         case LDAP_REQ_UNBIND:
1091                 num_ops_completed_[SLAP_OP_UNBIND]++;
1092                 break;
1093         case LDAP_REQ_ADD:
1094                 num_ops_completed_[SLAP_OP_ADD]++;
1095                 break;
1096         case LDAP_REQ_DELETE:
1097                 num_ops_completed_[SLAP_OP_DELETE]++;
1098                 break;
1099         case LDAP_REQ_MODRDN:
1100                 num_ops_completed_[SLAP_OP_MODRDN]++;
1101                 break;
1102         case LDAP_REQ_MODIFY:
1103                 num_ops_completed_[SLAP_OP_MODIFY]++;
1104                 break;
1105         case LDAP_REQ_COMPARE:
1106                 num_ops_completed_[SLAP_OP_COMPARE]++;
1107                 break;
1108         case LDAP_REQ_SEARCH:
1109                 num_ops_completed_[SLAP_OP_SEARCH]++;
1110                 break;
1111         case LDAP_REQ_ABANDON:
1112                 num_ops_completed_[SLAP_OP_ABANDON]++;
1113                 break;
1114         case LDAP_REQ_EXTENDED:
1115                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1116                 break;
1117         default:
1118                 /* not reachable */
1119                 assert( 0 );
1120         }
1121 #endif /* SLAPD_MONITOR */
1122         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1123
1124         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1125                 op->o_cancel = LDAP_TOO_LATE;
1126         }
1127         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1128                 op->o_cancel != SLAP_CANCEL_DONE )
1129         {
1130                 ldap_pvt_thread_yield();
1131         }
1132
1133         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1134
1135         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1136
1137         if ( op->o_cancel != SLAP_CANCEL_ACK &&
1138                 ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
1139         {
1140                 slap_sl_mem_detach( ctx, memctx );
1141
1142         } else if ( op->o_sync_slog_size != -1 ) {
1143                 slap_sl_mem_detach( ctx, memctx );
1144                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1145                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1146                 conn->c_n_ops_executing--;
1147                 conn->c_n_ops_completed++;
1148
1149         } else {
1150                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1151                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1152                 slap_op_free( op );
1153                 conn->c_n_ops_executing--;
1154                 conn->c_n_ops_completed++;
1155         }
1156
1157         switch( tag ) {
1158         case LBER_ERROR:
1159         case LDAP_REQ_UNBIND:
1160                 /* c_mutex is locked */
1161                 connection_closing( conn );
1162                 break;
1163
1164         case LDAP_REQ_BIND:
1165                 conn->c_sasl_bind_in_progress =
1166                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1167
1168                 if( conn->c_conn_state == SLAP_C_BINDING) {
1169                         conn->c_conn_state = SLAP_C_ACTIVE;
1170                 }
1171         }
1172
1173         connection_resched( conn );
1174         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1175         return NULL;
1176 }
1177
1178 static const Listener dummy_list = { {0, ""}, {0, ""} };
1179
1180 int connection_client_setup(
1181         ber_socket_t s,
1182         ldap_pvt_thread_start_t *func,
1183         void *arg )
1184 {
1185         int rc;
1186         Connection *c;
1187
1188         rc = connection_init( s, (Listener *)&dummy_list, "", "",
1189                 CONN_IS_CLIENT, 0, NULL );
1190         if ( rc < 0 ) return -1;
1191
1192         c = connection_get( s );
1193         c->c_clientfunc = func;
1194         c->c_clientarg = arg;
1195         connection_return( c );
1196         slapd_add_internal( s, 0 );
1197         slapd_set_read( s, 1 );
1198         return 0;
1199 }
1200
1201 void connection_client_enable(
1202         ber_socket_t s )
1203 {
1204         slapd_set_read( s, 1 );
1205 }
1206
1207 void connection_client_stop(
1208         ber_socket_t s )
1209 {
1210         Connection *c;
1211
1212         /* get (locked) connection */
1213         c = connection_get( s );
1214
1215         assert( c->c_conn_state == SLAP_C_CLIENT );
1216
1217         c->c_listener = NULL;
1218         c->c_conn_state = SLAP_C_INVALID;
1219         c->c_struct_state = SLAP_C_UNUSED;
1220         connection_return( c );
1221         slapd_remove( s, 0, 1 );
1222 }
1223
1224 int connection_read(ber_socket_t s)
1225 {
1226         int rc = 0;
1227         Connection *c;
1228
1229         assert( connections != NULL );
1230
1231         ldap_pvt_thread_mutex_lock( &connections_mutex );
1232
1233         /* get (locked) connection */
1234         c = connection_get( s );
1235
1236         if( c == NULL ) {
1237 #ifdef NEW_LOGGING
1238                 LDAP_LOG( CONNECTION, INFO,
1239                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1240 #else
1241                 Debug( LDAP_DEBUG_ANY,
1242                         "connection_read(%ld): no connection!\n",
1243                         (long) s, 0, 0 );
1244 #endif
1245                 slapd_remove(s, 1, 0);
1246
1247                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1248                 return -1;
1249         }
1250
1251         c->c_n_read++;
1252
1253         if( c->c_conn_state == SLAP_C_CLOSING ) {
1254 #ifdef NEW_LOGGING
1255                 LDAP_LOG( CONNECTION, INFO,
1256                         "connection_read: conn %lu connection closing, ignoring input\n",
1257                         c->c_connid, 0, 0 );
1258 #else
1259                 Debug( LDAP_DEBUG_TRACE,
1260                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1261                         s, c->c_connid, 0 );
1262 #endif
1263                 connection_return( c );
1264                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1265                 return 0;
1266         }
1267
1268         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1269                 slapd_clr_read( s, 0 );
1270                 ldap_pvt_thread_pool_submit( &connection_pool,
1271                         c->c_clientfunc, c->c_clientarg );
1272                 connection_return( c );
1273                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1274                 return 0;
1275         }
1276
1277 #ifdef NEW_LOGGING
1278         LDAP_LOG( CONNECTION, DETAIL1,
1279                 "connection_read: conn %lu checking for input.\n",
1280                         c->c_connid, 0, 0 );
1281 #else
1282         Debug( LDAP_DEBUG_TRACE,
1283                 "connection_read(%d): checking for input on id=%lu\n",
1284                 s, c->c_connid, 0 );
1285 #endif
1286
1287 #ifdef HAVE_TLS
1288         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1289                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1290                 if ( rc < 0 ) {
1291 #if 0 /* required by next #if 0 */
1292                         struct timeval tv;
1293                         fd_set rfd;
1294 #endif
1295
1296 #ifdef NEW_LOGGING
1297                         LDAP_LOG( CONNECTION, ERR,
1298                                 "connection_read: conn %lu TLS accept error, error %d\n",
1299                                 c->c_connid, rc, 0 );
1300 #else
1301                         Debug( LDAP_DEBUG_TRACE,
1302                                 "connection_read(%d): TLS accept error "
1303                                 "error=%d id=%lu, closing\n",
1304                                 s, rc, c->c_connid );
1305 #endif
1306                         c->c_needs_tls_accept = 0;
1307                         /* connections_mutex and c_mutex are locked */
1308                         connection_closing( c );
1309
1310 #if 0
1311                         /* Drain input before close, to allow SSL error codes
1312                          * to propagate to client. */
1313                         FD_ZERO(&rfd);
1314                         FD_SET(s, &rfd);
1315                         for (rc=1; rc>0;) {
1316                                 tv.tv_sec = 1;
1317                                 tv.tv_usec = 0;
1318                                 rc = select(s+1, &rfd, NULL, NULL, &tv);
1319                                 if (rc == 1) {
1320                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1321                                 }
1322                         }
1323 #endif
1324                         connection_close( c );
1325
1326                 } else if ( rc == 0 ) {
1327                         void *ssl;
1328                         struct berval authid = BER_BVNULL;
1329
1330                         c->c_needs_tls_accept = 0;
1331
1332                         /* we need to let SASL know */
1333                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1334
1335                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1336                         if( c->c_tls_ssf > c->c_ssf ) {
1337                                 c->c_ssf = c->c_tls_ssf;
1338                         }
1339
1340                         rc = dnX509peerNormalize( ssl, &authid );
1341                         if ( rc != LDAP_SUCCESS ) {
1342 #ifdef NEW_LOGGING
1343                                 LDAP_LOG( CONNECTION, INFO, "connection_read: "
1344                                         "conn %lu unable to get TLS client DN, error %d\n",
1345                                         c->c_connid, rc, 0 );
1346 #else
1347                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1348                                         "unable to get TLS client DN, error=%d id=%lu\n",
1349                                         s, rc, c->c_connid );
1350 #endif
1351                         }
1352                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1353                         if ( authid.bv_val ) free( authid.bv_val );
1354                 }
1355
1356                 /* if success and data is ready, fall thru to data input loop */
1357                 if( rc != 0 ||
1358                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1359                 {
1360                         connection_return( c );
1361                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1362                         return 0;
1363                 }
1364         }
1365 #endif
1366
1367 #ifdef HAVE_CYRUS_SASL
1368         if ( c->c_sasl_layers ) {
1369                 /* If previous layer is not removed yet, give up for now */
1370                 if ( !c->c_sasl_sockctx ) {
1371                         connection_return( c );
1372                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1373                         return 0;
1374                 }
1375
1376                 c->c_sasl_layers = 0;
1377
1378                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1379
1380                 if( rc != LDAP_SUCCESS ) {
1381 #ifdef NEW_LOGGING
1382                         LDAP_LOG( CONNECTION, ERR,
1383                                 "connection_read: conn %lu SASL install error %d, closing\n",
1384                                 c->c_connid, rc, 0 );
1385 #else
1386                         Debug( LDAP_DEBUG_TRACE,
1387                                 "connection_read(%d): SASL install error "
1388                                 "error=%d id=%lu, closing\n",
1389                                 s, rc, c->c_connid );
1390 #endif
1391                         /* connections_mutex and c_mutex are locked */
1392                         connection_closing( c );
1393                         connection_close( c );
1394                         connection_return( c );
1395                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1396                         return 0;
1397                 }
1398         }
1399 #endif
1400
1401 #define CONNECTION_INPUT_LOOP 1
1402 /* #define      DATA_READY_LOOP 1 */
1403
1404         do {
1405                 /* How do we do this without getting into a busy loop ? */
1406                 rc = connection_input( c );
1407         }
1408 #ifdef DATA_READY_LOOP
1409         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1410 #elif CONNECTION_INPUT_LOOP
1411         while(!rc);
1412 #else
1413         while(0);
1414 #endif
1415
1416         if( rc < 0 ) {
1417 #ifdef NEW_LOGGING
1418                 LDAP_LOG( CONNECTION, ERR,
1419                         "connection_read: conn %lu input error %d, closing.\n",
1420                         c->c_connid, rc, 0 );
1421 #else
1422                 Debug( LDAP_DEBUG_TRACE,
1423                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1424                         s, rc, c->c_connid );
1425 #endif
1426                 /* connections_mutex and c_mutex are locked */
1427                 connection_closing( c );
1428                 connection_close( c );
1429                 connection_return( c );
1430                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1431                 return 0;
1432         }
1433
1434         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1435                 slapd_set_read( s, 1 );
1436         }
1437
1438         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1439                 slapd_set_write( s, 1 );
1440         }
1441
1442         connection_return( c );
1443         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1444         return 0;
1445 }
1446
1447 static int
1448 connection_input(
1449         Connection *conn )
1450 {
1451         Operation *op;
1452         ber_tag_t       tag;
1453         ber_len_t       len;
1454         ber_int_t       msgid;
1455         BerElement      *ber;
1456         int             rc;
1457 #ifdef LDAP_CONNECTIONLESS
1458         Sockaddr        peeraddr;
1459         char            *cdn = NULL;
1460 #endif
1461         char *defer = NULL;
1462
1463         if ( conn->c_currentber == NULL &&
1464                 ( conn->c_currentber = ber_alloc()) == NULL )
1465         {
1466 #ifdef NEW_LOGGING
1467                 LDAP_LOG( CONNECTION, ERR,
1468                         "connection_input: conn %lu ber_alloc failed.\n",
1469                         conn->c_connid, 0, 0 );
1470 #else
1471                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1472 #endif
1473                 return -1;
1474         }
1475
1476         errno = 0;
1477
1478 #ifdef LDAP_CONNECTIONLESS
1479         if ( conn->c_is_udp ) {
1480                 char    peername[sizeof("IP=255.255.255.255:65336")];
1481                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1482                         sizeof(struct sockaddr));
1483                 if (len != sizeof(struct sockaddr))
1484                         return 1;
1485                 sprintf( peername, "IP=%s:%d",
1486                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1487                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1488                 Statslog( LDAP_DEBUG_STATS,
1489                         "conn=%lu UDP request from %s (%s) accepted.\n",
1490                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1491         }
1492 #endif
1493         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1494         if ( tag != LDAP_TAG_MESSAGE ) {
1495                 int err = errno;
1496                 ber_socket_t    sd;
1497
1498                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1499
1500 #ifdef NEW_LOGGING
1501                 LDAP_LOG( CONNECTION, ERR,
1502                         "connection_input: conn %lu ber_get_next failed, errno %d (%s).\n",
1503                         conn->c_connid, err, sock_errstr(err) );
1504 #else
1505                 Debug( LDAP_DEBUG_TRACE,
1506                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1507                         sd, err, sock_errstr(err) );
1508 #endif
1509                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1510                         /* log, close and send error */
1511                         ber_free( conn->c_currentber, 1 );
1512                         conn->c_currentber = NULL;
1513
1514                         return -2;
1515                 }
1516                 return 1;
1517         }
1518
1519         ber = conn->c_currentber;
1520         conn->c_currentber = NULL;
1521
1522         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1523                 /* log, close and send error */
1524 #ifdef NEW_LOGGING
1525                 LDAP_LOG( CONNECTION, ERR,
1526                         "connection_input: conn %lu ber_get_int returns 0x%lx.\n",
1527                         conn->c_connid, tag, 0 );
1528 #else
1529                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n",
1530                         tag, 0, 0 );
1531 #endif
1532                 ber_free( ber, 1 );
1533                 return -1;
1534         }
1535
1536         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1537                 /* log, close and send error */
1538 #ifdef NEW_LOGGING
1539                 LDAP_LOG( CONNECTION, ERR,
1540                         "connection_input: conn %lu ber_peek_tag returns 0x%lx.\n",
1541                         conn->c_connid, tag, 0 );
1542 #else
1543                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n",
1544                         tag, 0, 0 );
1545 #endif
1546                 ber_free( ber, 1 );
1547
1548                 return -1;
1549         }
1550
1551 #ifdef LDAP_CONNECTIONLESS
1552         if( conn->c_is_udp ) {
1553                 if( tag == LBER_OCTETSTRING ) {
1554                         ber_get_stringa( ber, &cdn );
1555                         tag = ber_peek_tag(ber, &len);
1556                 }
1557                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1558 #ifdef NEW_LOGGING
1559                         LDAP_LOG( CONNECTION, ERR,
1560                                 "connection_input: conn %lu invalid req for UDP 0x%lx.\n",
1561                                 conn->c_connid, tag, 0 );
1562 #else
1563                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1564 #endif
1565                         ber_free( ber, 1 );
1566                         return 0;
1567                 }
1568         }
1569 #endif
1570         if(tag == LDAP_REQ_BIND) {
1571                 /* immediately abandon all exiting operations upon BIND */
1572                 connection_abandon( conn );
1573         }
1574
1575         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1576
1577         op->o_conn = conn;
1578         op->o_assertion = NULL;
1579         op->o_preread_attrs = NULL;
1580         op->o_postread_attrs = NULL;
1581         op->o_vrFilter = NULL;
1582         /* clear state if the connection is being reused from inactive */
1583         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1584                 memset( &conn->c_pagedresults_state, 0, sizeof( conn->c_pagedresults_state ) );
1585         }
1586         op->o_pagedresults_state = conn->c_pagedresults_state;
1587
1588         op->o_res_ber = NULL;
1589
1590 #ifdef LDAP_CONNECTIONLESS
1591         if (conn->c_is_udp) {
1592                 if ( cdn ) {
1593                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1594                         op->o_protocol = LDAP_VERSION2;
1595                 }
1596                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1597                 if (op->o_res_ber == NULL) return 1;
1598
1599                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1600                         sizeof(struct sockaddr), 0 );
1601
1602                 if (rc != sizeof(struct sockaddr)) {
1603 #ifdef NEW_LOGGING
1604                         LDAP_LOG( CONNECTION, INFO,
1605                                 "connection_input: conn %lu ber_write failed\n",
1606                                 conn->c_connid, 0, 0 );
1607 #else
1608                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1609 #endif
1610                         return 1;
1611                 }
1612
1613                 if (op->o_protocol == LDAP_VERSION2) {
1614                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1615                         if (rc == -1) {
1616 #ifdef NEW_LOGGING
1617                                 LDAP_LOG( CONNECTION, INFO,
1618                                         "connection_input: conn %lu put outer sequence failed\n",
1619                                         conn->c_connid, 0, 0 );
1620 #else
1621                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1622 #endif
1623                                 return rc;
1624                         }
1625                 }
1626         }
1627 #endif /* LDAP_CONNECTIONLESS */
1628
1629         rc = 0;
1630
1631         /* Don't process requests when the conn is in the middle of a
1632          * Bind, or if it's closing. Also, don't let any single conn
1633          * use up all the available threads, and don't execute if we're
1634          * currently blocked on output. And don't execute if there are
1635          * already pending ops, let them go first.  Abandon operations
1636          * get exceptions to some, but not all, cases.
1637          */
1638         if (tag != LDAP_REQ_ABANDON && conn->c_conn_state == SLAP_C_CLOSING) {
1639                 defer = "closing";
1640         } else if (tag != LDAP_REQ_ABANDON && conn->c_writewaiter) {
1641                 defer = "awaiting write";
1642         } else if (conn->c_n_ops_executing >= connection_pool_max/2) {
1643                 defer = "too many executing";
1644         } else if (conn->c_conn_state == SLAP_C_BINDING) {
1645                 defer = "binding";
1646         } else if (tag != LDAP_REQ_ABANDON && conn->c_n_ops_pending) {
1647                 defer = "pending operations";
1648         }
1649
1650         if( defer ) {
1651                 int max = conn->c_dn.bv_len
1652                         ? slap_conn_max_pending_auth
1653                         : slap_conn_max_pending;
1654
1655 #ifdef NEW_LOGGING
1656                 LDAP_LOG( CONNECTION, INFO,
1657                         "connection_input: conn %lu deferring operation: %s\n",
1658                         conn->c_connid, defer, 0 );
1659 #else
1660                 Debug( LDAP_DEBUG_ANY,
1661                         "connection_input: conn=%lu deferring operation: %s\n",
1662                         conn->c_connid, defer, 0 );
1663 #endif
1664                 conn->c_n_ops_pending++;
1665                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1666                 if ( conn->c_n_ops_pending > max ) {
1667                         rc = -1;
1668                 } else {
1669                         rc = 1;
1670                 }
1671         } else {
1672                 conn->c_n_ops_executing++;
1673                 connection_op_activate( op );
1674         }
1675
1676 #ifdef NO_THREADS
1677         if ( conn->c_struct_state != SLAP_C_USED ) {
1678                 /* connection must have got closed underneath us */
1679                 return 1;
1680         }
1681 #endif
1682         assert( conn->c_struct_state == SLAP_C_USED );
1683
1684         return rc;
1685 }
1686
1687 static int
1688 connection_resched( Connection *conn )
1689 {
1690         Operation *op;
1691
1692         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1693                 int rc;
1694                 ber_socket_t    sd;
1695                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1696
1697                 /* us trylock to avoid possible deadlock */
1698                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1699
1700                 if( rc ) {
1701 #ifdef NEW_LOGGING
1702                         LDAP_LOG( CONNECTION, DETAIL1,
1703                                 "connection_resched: conn %lu reaquiring locks.\n",
1704                                 conn->c_connid, 0, 0 );
1705 #else
1706                         Debug( LDAP_DEBUG_TRACE,
1707                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1708                                 conn->c_connid, sd, 0 );
1709 #endif
1710                         /*
1711                          * reaquire locks in the right order...
1712                          * this may allow another thread to close this connection,
1713                          * so recheck state below.
1714                          */
1715                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1716                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1717                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1718                 }
1719
1720                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1721 #ifdef NEW_LOGGING
1722                         LDAP_LOG( CONNECTION, INFO,
1723                                 "connection_resched: conn %lu closed by other thread.\n",
1724                                 conn->c_connid, 0, 0 );
1725 #else
1726                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1727                                 "closed by other thread conn=%lu sd=%d\n",
1728                                 conn->c_connid, sd, 0 );
1729 #endif
1730                 } else {
1731 #ifdef NEW_LOGGING
1732                         LDAP_LOG( CONNECTION, DETAIL1,
1733                                 "connection_resched: conn %lu attempting closing.\n",
1734                                 conn->c_connid, 0, 0 );
1735 #else
1736                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1737                                 "attempting closing conn=%lu sd=%d\n",
1738                                 conn->c_connid, sd, 0 );
1739 #endif
1740                         connection_close( conn );
1741                 }
1742
1743                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1744                 return 0;
1745         }
1746
1747         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1748                 /* other states need different handling */
1749                 return 0;
1750         }
1751
1752         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1753                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1754                         break;
1755                 }
1756                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1757                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1758                 /* pending operations should not be marked for abandonment */
1759                 assert(!op->o_abandon);
1760
1761                 conn->c_n_ops_pending--;
1762                 conn->c_n_ops_executing++;
1763
1764                 connection_op_activate( op );
1765
1766                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1767                         break;
1768                 }
1769         }
1770         return 0;
1771 }
1772
1773 static int connection_op_activate( Operation *op )
1774 {
1775         int status;
1776         ber_tag_t tag = op->o_tag;
1777
1778         if(tag == LDAP_REQ_BIND) {
1779                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1780         }
1781
1782         if (!op->o_dn.bv_len) {
1783                 op->o_authz = op->o_conn->c_authz;
1784                 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1785                 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1786         }
1787         op->o_authtype = op->o_conn->c_authtype;
1788         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1789
1790         if (!op->o_protocol) {
1791                 op->o_protocol = op->o_conn->c_protocol
1792                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1793         }
1794         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1795                 && op->o_protocol > LDAP_VERSION2)
1796         {
1797                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1798         }
1799
1800         op->o_connid = op->o_conn->c_connid;
1801
1802         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1803
1804         status = ldap_pvt_thread_pool_submit( &connection_pool,
1805                 connection_operation, (void *) op );
1806
1807         if ( status != 0 ) {
1808 #ifdef NEW_LOGGING
1809                 LDAP_LOG( CONNECTION, ERR,
1810                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1811                         op->o_connid, 0, 0 );
1812 #else
1813                 Debug( LDAP_DEBUG_ANY,
1814                         "ldap_pvt_thread_pool_submit: failed (%d) for conn=%lu\n",
1815                         status, op->o_connid, 0 );
1816 #endif
1817                 /* should move op to pending list */
1818         }
1819
1820         return status;
1821 }
1822
1823 int connection_write(ber_socket_t s)
1824 {
1825         Connection *c;
1826
1827         assert( connections != NULL );
1828
1829         ldap_pvt_thread_mutex_lock( &connections_mutex );
1830
1831         c = connection_get( s );
1832
1833         slapd_clr_write( s, 0);
1834
1835         if( c == NULL ) {
1836 #ifdef NEW_LOGGING
1837                 LDAP_LOG( CONNECTION, ERR,
1838                         "connection_write: sock %ld no connection!\n", (long)s, 0, 0);
1839 #else
1840                 Debug( LDAP_DEBUG_ANY,
1841                         "connection_write(%ld): no connection!\n",
1842                         (long)s, 0, 0 );
1843 #endif
1844                 slapd_remove(s, 1, 0);
1845                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1846                 return -1;
1847         }
1848
1849         c->c_n_write++;
1850
1851 #ifdef NEW_LOGGING
1852         LDAP_LOG( CONNECTION, DETAIL1,
1853                 "connection_write conn %lu waking output.\n", c->c_connid, 0, 0 );
1854 #else
1855         Debug( LDAP_DEBUG_TRACE,
1856                 "connection_write(%d): waking output for id=%lu\n",
1857                 s, c->c_connid, 0 );
1858 #endif
1859         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1860
1861         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1862                 slapd_set_read( s, 1 );
1863         }
1864         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1865                 slapd_set_write( s, 1 );
1866         }
1867         connection_return( c );
1868         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1869         return 0;
1870 }
1871
1872 void
1873 connection_fake_init(
1874         Connection *conn,
1875         Operation *op,
1876         void *ctx )
1877 {
1878         conn->c_connid = -1;
1879         conn->c_send_ldap_result = slap_send_ldap_result;
1880         conn->c_send_search_entry = slap_send_search_entry;
1881         conn->c_send_search_reference = slap_send_search_reference;
1882         conn->c_listener = (Listener *)&dummy_list;
1883         conn->c_peer_name = slap_empty_bv;
1884
1885         /* set memory context */
1886         op->o_tmpmemctx = slap_sl_mem_create( SLAP_SLAB_SIZE, ctx );
1887         op->o_tmpmfuncs = &slap_sl_mfuncs;
1888         op->o_threadctx = ctx;
1889
1890         op->o_conn = conn;
1891         op->o_connid = op->o_conn->c_connid;
1892
1893         op->o_time = slap_get_time();
1894 }