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 1998-2007 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 #ifdef HAVE_LIMITS_H
  30 #include <limits.h>
  31 #endif
  32
  33 #include <ac/socket.h>
  34 #include <ac/errno.h>
  35 #include <ac/string.h>
  36 #include <ac/time.h>
  37 #include <ac/unistd.h>
  38
  39 #include "lutil.h"
  40 #include "slap.h"
  41
  42 #ifdef LDAP_SLAPI
  43 #include "slapi/slapi.h"
  44 #endif
  45
  46 /* protected by connections_mutex */
  47 static ldap_pvt_thread_mutex_t connections_mutex;
  48 static Connection *connections = NULL;
  49
  50 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
  51 static unsigned long conn_nextid = 0;
  52
  53 static const char conn_lost_str[] = "connection lost";
  54
  55 /* structure state (protected by connections_mutex) */
  56 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  57 #define SLAP_C_UNUSED                   0x01
  58 #define SLAP_C_USED                             0x02
  59 #define SLAP_C_PENDING                  0x03
  60
  61 /* connection state (protected by c_mutex ) */
  62 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  63 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  64 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  65 #define SLAP_C_BINDING                  0x03    /* binding */
  66 #define SLAP_C_CLOSING                  0x04    /* closing */
  67 #define SLAP_C_CLIENT                   0x05    /* outbound client conn */
  68
  69 const char *
  70 connection_state2str( int state )
  71 {
  72         switch( state ) {
  73         case SLAP_C_INVALID:    return "!";
  74         case SLAP_C_INACTIVE:   return "|";
  75         case SLAP_C_ACTIVE:             return "";
  76         case SLAP_C_BINDING:    return "B";
  77         case SLAP_C_CLOSING:    return "C";
  78         case SLAP_C_CLIENT:             return "L";
  79         }
  80
  81         return "?";
  82 }
  83
  84 static Connection* connection_get( ber_socket_t s );
  85
  86 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
  87
  88 typedef struct conn_readinfo {
  89         Operation *op;
  90         ldap_pvt_thread_start_t *func;
  91         void *arg;
  92         int nullop;
  93 } conn_readinfo;
  94
  95 static int connection_input( Connection *c, conn_readinfo *cri );
  96 #else
  97 static int connection_input( Connection *c );
  98 #endif
  99 static void connection_close( Connection *c );
 100
 101 static int connection_op_activate( Operation *op );
 102 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
 103 static void connection_op_queue( Operation *op );
 104 #endif
 105 static int connection_resched( Connection *conn );
 106 static void connection_abandon( Connection *conn );
 107 static void connection_destroy( Connection *c );
 108
 109 static ldap_pvt_thread_start_t connection_operation;
 110
 111 /*
 112  * Initialize connection management infrastructure.
 113  */
 114 int connections_init(void)
 115 {
 116         int i;
 117
 118         assert( connections == NULL );
 119
 120         if( connections != NULL) {
 121                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 122                         0, 0, 0 );
 123                 return -1;
 124         }
 125
 126         /* should check return of every call */
 127         ldap_pvt_thread_mutex_init( &connections_mutex );
 128         ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 129
 130         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 131
 132         if( connections == NULL ) {
 133                 Debug( LDAP_DEBUG_ANY, "connections_init: "
 134                         "allocation (%d*%ld) of connection array failed\n",
 135                         dtblsize, (long) sizeof(Connection), 0 );
 136                 return -1;
 137         }
 138
 139         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 140         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 141
 142         for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 143
 144         /*
 145          * per entry initialization of the Connection array initialization
 146          * will be done by connection_init()
 147          */
 148
 149         return 0;
 150 }
 151
 152 /*
 153  * Destroy connection management infrastructure.
 154  */
 155
 156 int connections_destroy(void)
 157 {
 158         ber_socket_t i;
 159
 160         /* should check return of every call */
 161
 162         if( connections == NULL) {
 163                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 164                         0, 0, 0 );
 165                 return -1;
 166         }
 167
 168         for ( i = 0; i < dtblsize; i++ ) {
 169                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 170                         ber_sockbuf_free( connections[i].c_sb );
 171                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 172                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 173                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 174 #ifdef LDAP_SLAPI
 175                         if ( slapi_plugins_used ) {
 176                                 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
 177                                         &connections[i] );
 178                         }
 179 #endif
 180                 }
 181         }
 182
 183         free( connections );
 184         connections = NULL;
 185
 186         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 187         ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
 188         return 0;
 189 }
 190
 191 /*
 192  * shutdown all connections
 193  */
 194 int connections_shutdown(void)
 195 {
 196         ber_socket_t i;
 197
 198         for ( i = 0; i < dtblsize; i++ ) {
 199                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 200                         ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 201                         if( connections[i].c_struct_state == SLAP_C_USED ) {
 202
 203                                 /* give persistent clients a chance to cleanup */
 204                                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 205                                         ldap_pvt_thread_pool_submit( &connection_pool,
 206                                         connections[i].c_clientfunc, connections[i].c_clientarg );
 207                                 } else {
 208                                         /* c_mutex is locked */
 209                                         connection_closing( &connections[i], "slapd shutdown" );
 210                                         connection_close( &connections[i] );
 211                                 }
 212                         }
 213                         ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 214                 }
 215         }
 216
 217         return 0;
 218 }
 219
 220 /*
 221  * Timeout idle connections.
 222  */
 223 int connections_timeout_idle(time_t now)
 224 {
 225         int i = 0;
 226         int connindex;
 227         Connection* c;
 228
 229         for( c = connection_first( &connindex );
 230                 c != NULL;
 231                 c = connection_next( c, &connindex ) )
 232         {
 233                 /* Don't timeout a slow-running request or a persistent
 234                  * outbound connection */
 235                 if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
 236                         continue;
 237                 }
 238
 239                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 240                         /* close it */
 241                         connection_closing( c, "idletimeout" );
 242                         connection_close( c );
 243                         i++;
 244                 }
 245         }
 246         connection_done( c );
 247
 248         return i;
 249 }
 250
 251 static Connection* connection_get( ber_socket_t s )
 252 {
 253         Connection *c;
 254
 255         Debug( LDAP_DEBUG_ARGS,
 256                 "connection_get(%ld)\n",
 257                 (long) s, 0, 0 );
 258
 259         assert( connections != NULL );
 260
 261         if(s == AC_SOCKET_INVALID) return NULL;
 262
 263 #ifndef HAVE_WINSOCK
 264         assert( s < dtblsize );
 265         c = &connections[s];
 266
 267 #else
 268         c = NULL;
 269         {
 270                 ber_socket_t i, sd;
 271
 272                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 273                 for(i=0; i<dtblsize; i++) {
 274                         if( connections[i].c_struct_state == SLAP_C_PENDING )
 275                                 continue;
 276
 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                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 302         }
 303 #endif
 304
 305         if( c != NULL ) {
 306                 ber_socket_t    sd;
 307
 308                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 309
 310                 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 311
 312                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 313 #ifdef HAVE_WINSOCK
 314                 /* Avoid race condition after releasing
 315                  * connections_mutex
 316                  */
 317                 if ( sd != s ) {
 318                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319                         return NULL;
 320                 }
 321 #endif
 322                 if( c->c_struct_state != SLAP_C_USED ) {
 323                         /* connection must have been closed due to resched */
 324
 325                         assert( c->c_conn_state == SLAP_C_INVALID );
 326                         assert( sd == AC_SOCKET_INVALID );
 327
 328                         Debug( LDAP_DEBUG_TRACE,
 329                                 "connection_get(%d): connection not used\n",
 330                                 s, 0, 0 );
 331
 332                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 333                         return NULL;
 334                 }
 335
 336                 Debug( LDAP_DEBUG_TRACE,
 337                         "connection_get(%d): got connid=%lu\n",
 338                         s, c->c_connid, 0 );
 339
 340                 c->c_n_get++;
 341
 342                 assert( c->c_struct_state == SLAP_C_USED );
 343                 assert( c->c_conn_state != SLAP_C_INVALID );
 344                 assert( sd != AC_SOCKET_INVALID );
 345
 346 #ifndef SLAPD_MONITOR
 347                 if ( global_idletimeout > 0 )
 348 #endif /* ! SLAPD_MONITOR */
 349                 {
 350                         c->c_activitytime = slap_get_time();
 351                 }
 352         }
 353
 354         return c;
 355 }
 356
 357 static void connection_return( Connection *c )
 358 {
 359         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 360 }
 361
 362 Connection * connection_init(
 363         ber_socket_t s,
 364         Listener *listener,
 365         const char* dnsname,
 366         const char* peername,
 367         int flags,
 368         slap_ssf_t ssf,
 369         struct berval *authid
 370         LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
 371 {
 372         unsigned long id;
 373         Connection *c;
 374         int doinit = 0;
 375
 376         assert( connections != NULL );
 377
 378         assert( listener != NULL );
 379         assert( dnsname != NULL );
 380         assert( peername != NULL );
 381
 382 #ifndef HAVE_TLS
 383         assert( !( flags & CONN_IS_TLS ));
 384 #endif
 385
 386         if( s == AC_SOCKET_INVALID ) {
 387                 Debug( LDAP_DEBUG_ANY,
 388                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 389                 return NULL;
 390         }
 391
 392         assert( s >= 0 );
 393 #ifndef HAVE_WINSOCK
 394         assert( s < dtblsize );
 395         c = &connections[s];
 396         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 397                 doinit = 1;
 398         } else {
 399                 assert( c->c_struct_state == SLAP_C_UNUSED );
 400         }
 401 #else
 402         {
 403                 ber_socket_t i;
 404                 c = NULL;
 405
 406                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 407                 for( i=0; i < dtblsize; i++) {
 408                         ber_socket_t    sd;
 409
 410                         if ( connections[i].c_struct_state == SLAP_C_PENDING )
 411                                 continue;
 412
 413                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 414                                 assert( connections[i].c_sb == 0 );
 415                                 c = &connections[i];
 416                                 c->c_struct_state = SLAP_C_PENDING;
 417                                 doinit = 1;
 418                                 break;
 419                         }
 420
 421                         sd = AC_SOCKET_INVALID;
 422                         if (connections[i].c_sb != NULL) {
 423                                 ber_sockbuf_ctrl( connections[i].c_sb,
 424                                         LBER_SB_OPT_GET_FD, &sd );
 425                         }
 426
 427                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 428                                 assert( sd == AC_SOCKET_INVALID );
 429                                 c = &connections[i];
 430                                 c->c_struct_state = SLAP_C_PENDING;
 431                                 break;
 432                         }
 433
 434                         if( connections[i].c_conn_state == SLAP_C_CLIENT ) continue;
 435
 436                         assert( connections[i].c_struct_state == SLAP_C_USED );
 437                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 438                         assert( sd != AC_SOCKET_INVALID );
 439                 }
 440                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 441
 442                 if( c == NULL ) {
 443                         Debug( LDAP_DEBUG_ANY,
 444                                 "connection_init(%d): connection table full "
 445                                 "(%d/%d)\n", s, i, dtblsize);
 446                         return NULL;
 447                 }
 448         }
 449 #endif
 450
 451         if( doinit ) {
 452                 c->c_send_ldap_result = slap_send_ldap_result;
 453                 c->c_send_search_entry = slap_send_search_entry;
 454                 c->c_send_search_reference = slap_send_search_reference;
 455                 c->c_send_ldap_extended = slap_send_ldap_extended;
 456                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 457
 458                 BER_BVZERO( &c->c_authmech );
 459                 BER_BVZERO( &c->c_dn );
 460                 BER_BVZERO( &c->c_ndn );
 461
 462                 c->c_listener = NULL;
 463                 BER_BVZERO( &c->c_peer_domain );
 464                 BER_BVZERO( &c->c_peer_name );
 465
 466                 LDAP_STAILQ_INIT(&c->c_ops);
 467                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 468
 469 #ifdef LDAP_X_TXN
 470                 c->c_txn = CONN_TXN_INACTIVE;
 471                 c->c_txn_backend = NULL;
 472                 LDAP_STAILQ_INIT(&c->c_txn_ops);
 473 #endif
 474
 475                 BER_BVZERO( &c->c_sasl_bind_mech );
 476                 c->c_sasl_done = 0;
 477                 c->c_sasl_authctx = NULL;
 478                 c->c_sasl_sockctx = NULL;
 479                 c->c_sasl_extra = NULL;
 480                 c->c_sasl_bindop = NULL;
 481
 482                 c->c_sb = ber_sockbuf_alloc( );
 483
 484                 {
 485                         ber_len_t max = sockbuf_max_incoming;
 486                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 487                 }
 488
 489                 c->c_currentber = NULL;
 490
 491                 /* should check status of thread calls */
 492                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 493                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 494                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 495
 496 #ifdef LDAP_SLAPI
 497                 if ( slapi_plugins_used ) {
 498                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 499                 }
 500 #endif
 501         }
 502
 503         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 504
 505         assert( BER_BVISNULL( &c->c_authmech ) );
 506         assert( BER_BVISNULL( &c->c_dn ) );
 507         assert( BER_BVISNULL( &c->c_ndn ) );
 508         assert( c->c_listener == NULL );
 509         assert( BER_BVISNULL( &c->c_peer_domain ) );
 510         assert( BER_BVISNULL( &c->c_peer_name ) );
 511         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 512         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 513 #ifdef LDAP_X_TXN
 514         assert( c->c_txn == CONN_TXN_INACTIVE );
 515         assert( c->c_txn_backend == NULL );
 516         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 517 #endif
 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_connid = 0;
 531                 c->c_conn_state = SLAP_C_CLIENT;
 532                 c->c_struct_state = SLAP_C_USED;
 533                 c->c_close_reason = "?";                        /* should never be needed */
 534                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
 535                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 536
 537                 return c;
 538         }
 539
 540         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 541         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 542
 543         c->c_n_ops_received = 0;
 544         c->c_n_ops_executing = 0;
 545         c->c_n_ops_pending = 0;
 546         c->c_n_ops_completed = 0;
 547
 548         c->c_n_get = 0;
 549         c->c_n_read = 0;
 550         c->c_n_write = 0;
 551
 552         /* set to zero until bind, implies LDAP_VERSION3 */
 553         c->c_protocol = 0;
 554
 555 #ifndef SLAPD_MONITOR
 556         if ( global_idletimeout > 0 )
 557 #endif /* ! SLAPD_MONITOR */
 558         {
 559                 c->c_activitytime = c->c_starttime = slap_get_time();
 560         }
 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 /* LDAP_CONNECTIONLESS */
 576 #ifdef LDAP_PF_LOCAL
 577         if ( flags & CONN_IS_IPC ) {
 578 #ifdef LDAP_DEBUG
 579                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 580                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 581 #endif
 582                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
 583                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 584 #ifdef LDAP_PF_LOCAL_SENDMSG
 585                 if ( !BER_BVISEMPTY( peerbv ))
 586                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
 587 #endif
 588         } else
 589 #endif /* LDAP_PF_LOCAL */
 590         {
 591 #ifdef LDAP_DEBUG
 592                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 593                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 594 #endif
 595                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 596                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 597         }
 598
 599 #ifdef LDAP_DEBUG
 600         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 601                 INT_MAX, (void*)"ldap_" );
 602 #endif
 603
 604         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 605                 c /* non-NULL */ ) < 0 )
 606         {
 607                 Debug( LDAP_DEBUG_ANY,
 608                         "connection_init(%d, %s): set nonblocking failed\n",
 609                         s, c->c_peer_name.bv_val, 0 );
 610         }
 611
 612         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 613         id = c->c_connid = conn_nextid++;
 614         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 615
 616         c->c_conn_state = SLAP_C_INACTIVE;
 617         c->c_struct_state = SLAP_C_USED;
 618         c->c_close_reason = "?";                        /* should never be needed */
 619
 620         c->c_ssf = c->c_transport_ssf = ssf;
 621         c->c_tls_ssf = 0;
 622
 623 #ifdef HAVE_TLS
 624         if ( flags & CONN_IS_TLS ) {
 625                 c->c_is_tls = 1;
 626                 c->c_needs_tls_accept = 1;
 627         } else {
 628                 c->c_is_tls = 0;
 629                 c->c_needs_tls_accept = 0;
 630         }
 631 #endif
 632
 633         slap_sasl_open( c, 0 );
 634         slap_sasl_external( c, ssf, authid );
 635
 636         slapd_add_internal( s, 1 );
 637         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 638
 639         backend_connection_init(c);
 640
 641         return c;
 642 }
 643
 644 void connection2anonymous( Connection *c )
 645 {
 646         assert( connections != NULL );
 647         assert( c != NULL );
 648
 649         {
 650                 ber_len_t max = sockbuf_max_incoming;
 651                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 652         }
 653
 654         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 655                 ch_free(c->c_authmech.bv_val);
 656         }
 657         BER_BVZERO( &c->c_authmech );
 658
 659         if ( !BER_BVISNULL( &c->c_dn ) ) {
 660                 ch_free(c->c_dn.bv_val);
 661         }
 662         BER_BVZERO( &c->c_dn );
 663
 664         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 665                 ch_free(c->c_ndn.bv_val);
 666         }
 667         BER_BVZERO( &c->c_ndn );
 668
 669         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 670                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 671         }
 672         BER_BVZERO( &c->c_sasl_authz_dn );
 673
 674         c->c_authz_backend = NULL;
 675 }
 676
 677 static void
 678 connection_destroy( Connection *c )
 679 {
 680         ber_socket_t    sd;
 681         unsigned long   connid;
 682         const char              *close_reason;
 683         Sockbuf                 *sb;
 684
 685         assert( connections != NULL );
 686         assert( c != NULL );
 687         assert( c->c_struct_state != SLAP_C_UNUSED );
 688         assert( c->c_conn_state != SLAP_C_INVALID );
 689         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 690         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 691 #ifdef LDAP_X_TXN
 692         assert( c->c_txn == CONN_TXN_INACTIVE );
 693         assert( c->c_txn_backend == NULL );
 694         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 695 #endif
 696         assert( c->c_writewaiter == 0);
 697
 698         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 699         connid = c->c_connid;
 700         close_reason = c->c_close_reason;
 701
 702         ldap_pvt_thread_mutex_lock( &connections_mutex );
 703         c->c_struct_state = SLAP_C_PENDING;
 704         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 705
 706         backend_connection_destroy(c);
 707
 708         c->c_protocol = 0;
 709         c->c_connid = -1;
 710
 711         c->c_activitytime = c->c_starttime = 0;
 712
 713         connection2anonymous( c );
 714         c->c_listener = NULL;
 715
 716         if(c->c_peer_domain.bv_val != NULL) {
 717                 free(c->c_peer_domain.bv_val);
 718         }
 719         BER_BVZERO( &c->c_peer_domain );
 720         if(c->c_peer_name.bv_val != NULL) {
 721                 free(c->c_peer_name.bv_val);
 722         }
 723         BER_BVZERO( &c->c_peer_name );
 724
 725         c->c_sasl_bind_in_progress = 0;
 726         if(c->c_sasl_bind_mech.bv_val != NULL) {
 727                 free(c->c_sasl_bind_mech.bv_val);
 728         }
 729         BER_BVZERO( &c->c_sasl_bind_mech );
 730
 731         slap_sasl_close( c );
 732
 733         if ( c->c_currentber != NULL ) {
 734                 ber_free( c->c_currentber, 1 );
 735                 c->c_currentber = NULL;
 736         }
 737
 738
 739 #ifdef LDAP_SLAPI
 740         /* call destructors, then constructors; avoids unnecessary allocation */
 741         if ( slapi_plugins_used ) {
 742                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 743         }
 744 #endif
 745
 746         c->c_conn_state = SLAP_C_INVALID;
 747         c->c_struct_state = SLAP_C_UNUSED;
 748         c->c_close_reason = "?";                        /* should never be needed */
 749
 750         sb = c->c_sb;
 751         c->c_sb = ber_sockbuf_alloc( );
 752         {
 753                 ber_len_t max = sockbuf_max_incoming;
 754                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 755         }
 756
 757         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 758
 759         /* c must be fully reset by this point; when we call slapd_remove
 760          * it may get immediately reused by a new connection.
 761          */
 762         if ( sd != AC_SOCKET_INVALID ) {
 763                 slapd_remove( sd, sb, 1, 0, 0 );
 764
 765                 if ( close_reason == NULL ) {
 766                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
 767                                 connid, (long) sd, 0, 0, 0 );
 768                 } else {
 769                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
 770                                 connid, (long) sd, close_reason, 0, 0 );
 771                 }
 772         }
 773 }
 774
 775 int connection_state_closing( Connection *c )
 776 {
 777         /* c_mutex must be locked by caller */
 778
 779         int state;
 780         assert( c != NULL );
 781         assert( c->c_struct_state == SLAP_C_USED );
 782
 783         state = c->c_conn_state;
 784
 785         assert( state != SLAP_C_INVALID );
 786
 787         return state == SLAP_C_CLOSING;
 788 }
 789
 790 static void connection_abandon( Connection *c )
 791 {
 792         /* c_mutex must be locked by caller */
 793
 794         Operation *o, *next, op = {0};
 795         Opheader ohdr = {0};
 796         SlapReply rs = {0};
 797
 798         op.o_hdr = &ohdr;
 799         op.o_conn = c;
 800         op.o_connid = c->c_connid;
 801         op.o_tag = LDAP_REQ_ABANDON;
 802
 803         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 804                 next = LDAP_STAILQ_NEXT( o, o_next );
 805                 op.orn_msgid = o->o_msgid;
 806                 o->o_abandon = 1;
 807                 op.o_bd = frontendDB;
 808                 frontendDB->be_abandon( &op, &rs );
 809         }
 810
 811 #ifdef LDAP_X_TXN
 812         /* remove operations in pending transaction */
 813         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 814                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 815                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 816                 slap_op_free( o );
 817         }
 818
 819         /* clear transaction */
 820         c->c_txn_backend = NULL;
 821         c->c_txn = CONN_TXN_INACTIVE;
 822 #endif
 823
 824         /* remove pending operations */
 825         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 826                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 827                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 828                 slap_op_free( o );
 829         }
 830 }
 831
 832 void connection_closing( Connection *c, const char *why )
 833 {
 834         assert( connections != NULL );
 835         assert( c != NULL );
 836         assert( c->c_struct_state == SLAP_C_USED );
 837         assert( c->c_conn_state != SLAP_C_INVALID );
 838
 839         /* c_mutex must be locked by caller */
 840
 841         if( c->c_conn_state != SLAP_C_CLOSING ) {
 842                 ber_socket_t    sd;
 843
 844                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 845                 Debug( LDAP_DEBUG_TRACE,
 846                         "connection_closing: readying conn=%lu sd=%d for close\n",
 847                         c->c_connid, sd, 0 );
 848                 /* update state to closing */
 849                 c->c_conn_state = SLAP_C_CLOSING;
 850                 c->c_close_reason = why;
 851
 852                 /* don't listen on this port anymore */
 853                 slapd_clr_read( sd, 0 );
 854
 855                 /* abandon active operations */
 856                 connection_abandon( c );
 857
 858                 /* wake write blocked operations */
 859                 if ( c->c_writewaiter ) {
 860                         ldap_pvt_thread_cond_signal( &c->c_write_cv );
 861                         /* ITS#4667 this may allow another thread to drop into
 862                          * connection_resched / connection_close before we
 863                          * finish, but that's OK.
 864                          */
 865                         slapd_clr_write( sd, 1 );
 866                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 867                         ldap_pvt_thread_mutex_lock( &c->c_write_mutex );
 868                         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 869                         ldap_pvt_thread_mutex_unlock( &c->c_write_mutex );
 870                 } else {
 871                         slapd_clr_write( sd, 1 );
 872                 }
 873
 874         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 875                 /* Client closed connection after doing Unbind. */
 876                 c->c_close_reason = NULL;
 877         }
 878 }
 879
 880 static void
 881 connection_close( Connection *c )
 882 {
 883         ber_socket_t    sd = AC_SOCKET_INVALID;
 884
 885         assert( connections != NULL );
 886         assert( c != NULL );
 887
 888         /* ITS#4667 we may have gotten here twice */
 889         if ( c->c_conn_state == SLAP_C_INVALID )
 890                 return;
 891
 892         assert( c->c_struct_state == SLAP_C_USED );
 893         assert( c->c_conn_state == SLAP_C_CLOSING );
 894
 895         /* NOTE: c_mutex should be locked by caller */
 896
 897         /* NOTE: don't get the file descriptor if not needed */
 898         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 899                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 900         }
 901
 902         if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
 903                 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
 904         {
 905                 Debug( LDAP_DEBUG_TRACE,
 906                         "connection_close: deferring conn=%lu sd=%d\n",
 907                         c->c_connid, sd, 0 );
 908                 return;
 909         }
 910
 911         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 912                 c->c_connid, sd, 0 );
 913
 914         connection_destroy( c );
 915 }
 916
 917 unsigned long connections_nextid(void)
 918 {
 919         unsigned long id;
 920         assert( connections != NULL );
 921
 922         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 923
 924         id = conn_nextid;
 925
 926         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 927
 928         return id;
 929 }
 930
 931 Connection* connection_first( ber_socket_t *index )
 932 {
 933         assert( connections != NULL );
 934         assert( index != NULL );
 935
 936         ldap_pvt_thread_mutex_lock( &connections_mutex );
 937         for( *index = 0; *index < dtblsize; (*index)++) {
 938                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 939                         break;
 940                 }
 941         }
 942         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 943
 944         return connection_next(NULL, index);
 945 }
 946
 947 Connection* connection_next( Connection *c, ber_socket_t *index )
 948 {
 949         assert( connections != NULL );
 950         assert( index != NULL );
 951         assert( *index <= dtblsize );
 952
 953         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 954
 955         c = NULL;
 956
 957         ldap_pvt_thread_mutex_lock( &connections_mutex );
 958         for(; *index < dtblsize; (*index)++) {
 959                 int c_struct;
 960                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 961                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 962 #ifdef HAVE_WINSOCK
 963                         break;
 964 #else
 965                         continue;
 966 #endif
 967                 }
 968
 969                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 970                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 971                         c = &connections[(*index)++];
 972                         if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 973                                 /* avoid deadlock */
 974                                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 975                                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 976                                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 977                                 if ( c->c_struct_state != SLAP_C_USED ) {
 978                                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 979                                         c = NULL;
 980                                         continue;
 981                                 }
 982                         }
 983                         break;
 984                 }
 985
 986                 c_struct = connections[*index].c_struct_state;
 987                 if ( c_struct == SLAP_C_PENDING )
 988                         continue;
 989                 assert( c_struct == SLAP_C_UNUSED );
 990                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 991         }
 992
 993         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 994         return c;
 995 }
 996
 997 void connection_done( Connection *c )
 998 {
 999         assert( connections != NULL );
1000
1001         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
1002 }
1003
1004 /*
1005  * connection_activity - handle the request operation op on connection
1006  * conn.  This routine figures out what kind of operation it is and
1007  * calls the appropriate stub to handle it.
1008  */
1009
1010 #ifdef SLAPD_MONITOR
1011 /* FIXME: returns 0 in case of failure */
1012 #define INCR_OP_INITIATED(index) \
1013         do { \
1014                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1015                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated_[(index)], 1); \
1016                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1017         } while (0)
1018 #define INCR_OP_COMPLETED(index) \
1019         do { \
1020                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1021                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
1022                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed_[(index)], 1); \
1023                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1024         } while (0)
1025 #else /* !SLAPD_MONITOR */
1026 #define INCR_OP_INITIATED(index) do { } while (0)
1027 #define INCR_OP_COMPLETED(index) \
1028         do { \
1029                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1030                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
1031                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1032         } while (0)
1033 #endif /* !SLAPD_MONITOR */
1034
1035 /*
1036  * NOTE: keep in sync with enum in slapd.h
1037  */
1038 static BI_op_func *opfun[] = {
1039         do_bind,
1040         do_unbind,
1041         do_search,
1042         do_compare,
1043         do_modify,
1044         do_modrdn,
1045         do_add,
1046         do_delete,
1047         do_abandon,
1048         do_extended,
1049         NULL
1050 };
1051
1052 static void *
1053 connection_operation( void *ctx, void *arg_v )
1054 {
1055         int rc = LDAP_OTHER;
1056         Operation *op = arg_v;
1057         SlapReply rs = {REP_RESULT};
1058         ber_tag_t tag = op->o_tag;
1059         slap_op_t opidx = SLAP_OP_LAST;
1060         Connection *conn = op->o_conn;
1061         void *memctx = NULL;
1062         void *memctx_null = NULL;
1063         ber_len_t memsiz;
1064
1065         ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex );
1066         /* FIXME: returns 0 in case of failure */
1067         ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated, 1);
1068         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex );
1069
1070         op->o_threadctx = ctx;
1071         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1072
1073         switch ( tag ) {
1074         case LDAP_REQ_BIND:
1075         case LDAP_REQ_UNBIND:
1076         case LDAP_REQ_ADD:
1077         case LDAP_REQ_DELETE:
1078         case LDAP_REQ_MODDN:
1079         case LDAP_REQ_MODIFY:
1080         case LDAP_REQ_COMPARE:
1081         case LDAP_REQ_SEARCH:
1082         case LDAP_REQ_ABANDON:
1083         case LDAP_REQ_EXTENDED:
1084                 break;
1085         default:
1086                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1087                         "conn %lu unknown LDAP request 0x%lx\n",
1088                         conn->c_connid, tag, 0 );
1089                 op->o_tag = LBER_ERROR;
1090                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1091                 rs.sr_text = "unknown LDAP request";
1092                 send_ldap_disconnect( op, &rs );
1093                 rc = SLAPD_DISCONNECT;
1094                 goto operations_error;
1095         }
1096
1097         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1098                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1099                         "error: SASL bind in progress (tag=%ld).\n",
1100                         (long) tag, 0, 0 );
1101                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1102                         "SASL bind in progress" );
1103                 rc = LDAP_OPERATIONS_ERROR;
1104                 goto operations_error;
1105         }
1106
1107 #ifdef LDAP_X_TXN
1108         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1109                 ( tag == LDAP_REQ_ADD ) ||
1110                 ( tag == LDAP_REQ_DELETE ) ||
1111                 ( tag == LDAP_REQ_MODIFY ) ||
1112                 ( tag == LDAP_REQ_MODRDN )))
1113         {
1114                 /* Disable SLAB allocator for all update operations
1115                         issued inside of a transaction */
1116                 op->o_tmpmemctx = NULL;
1117                 op->o_tmpmfuncs = &ch_mfuncs;
1118         } else
1119 #endif
1120         {
1121         /* We can use Thread-Local storage for most mallocs. We can
1122          * also use TL for ber parsing, but not on Add or Modify.
1123          */
1124 #if 0
1125         memsiz = ber_len( op->o_ber ) * 64;
1126         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1127 #endif
1128         memsiz = SLAP_SLAB_SIZE;
1129
1130         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1131         op->o_tmpmemctx = memctx;
1132         op->o_tmpmfuncs = &slap_sl_mfuncs;
1133         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1134                 /* Note - the ber and its buffer are already allocated from
1135                  * regular memory; this only affects subsequent mallocs that
1136                  * ber_scanf may invoke.
1137                  */
1138                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1139         }
1140         }
1141
1142         opidx = slap_req2op( tag );
1143         assert( opidx != SLAP_OP_LAST );
1144         INCR_OP_INITIATED( opidx );
1145         rc = (*(opfun[opidx]))( op, &rs );
1146
1147 operations_error:
1148         if ( rc == SLAPD_DISCONNECT ) {
1149                 tag = LBER_ERROR;
1150
1151         } else if ( opidx != SLAP_OP_LAST ) {
1152                 /* increment completed operations count
1153                  * only if operation was initiated
1154                  * and rc != SLAPD_DISCONNECT */
1155                 INCR_OP_COMPLETED( opidx );
1156         }
1157
1158         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1159                 if ( rc == SLAPD_ABANDON ) {
1160                         op->o_cancel = SLAP_CANCEL_ACK;
1161                 } else {
1162                         op->o_cancel = LDAP_TOO_LATE;
1163                 }
1164         }
1165
1166         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1167                 op->o_cancel != SLAP_CANCEL_DONE )
1168         {
1169                 ldap_pvt_thread_yield();
1170         }
1171
1172         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1173
1174         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1175
1176         LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1177         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1178         slap_op_free( op );
1179         conn->c_n_ops_executing--;
1180         conn->c_n_ops_completed++;
1181
1182         switch( tag ) {
1183         case LBER_ERROR:
1184         case LDAP_REQ_UNBIND:
1185                 /* c_mutex is locked */
1186                 connection_closing( conn,
1187                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1188                 break;
1189         }
1190
1191         connection_resched( conn );
1192         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1193         return NULL;
1194 }
1195
1196 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1197
1198 int connection_client_setup(
1199         ber_socket_t s,
1200         ldap_pvt_thread_start_t *func,
1201         void *arg )
1202 {
1203         Connection *c;
1204
1205         c = connection_init( s, (Listener *)&dummy_list, "", "",
1206                 CONN_IS_CLIENT, 0, NULL
1207                 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1208         if ( !c ) return -1;
1209
1210         c->c_clientfunc = func;
1211         c->c_clientarg = arg;
1212
1213         slapd_add_internal( s, 0 );
1214         slapd_set_read( s, 1 );
1215         return 0;
1216 }
1217
1218 void connection_client_enable(
1219         ber_socket_t s )
1220 {
1221         slapd_set_read( s, 1 );
1222 }
1223
1224 void connection_client_stop(
1225         ber_socket_t s )
1226 {
1227         Connection *c;
1228         Sockbuf *sb;
1229
1230         /* get (locked) connection */
1231         c = connection_get( s );
1232
1233         assert( c->c_conn_state == SLAP_C_CLIENT );
1234
1235         c->c_listener = NULL;
1236         c->c_conn_state = SLAP_C_INVALID;
1237         c->c_struct_state = SLAP_C_UNUSED;
1238         c->c_close_reason = "?";                        /* should never be needed */
1239         sb = c->c_sb;
1240         c->c_sb = ber_sockbuf_alloc( );
1241         {
1242                 ber_len_t max = sockbuf_max_incoming;
1243                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1244         }
1245         slapd_remove( s, sb, 0, 1, 0 );
1246
1247         connection_return( c );
1248 }
1249
1250 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1251
1252 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1253
1254 static void* connection_read_thread( void* ctx, void* argv )
1255 {
1256         int rc ;
1257         conn_readinfo cri = { NULL, NULL, NULL, 0 };
1258         ber_socket_t s = (long)argv;
1259
1260         /*
1261          * read incoming LDAP requests. If there is more than one,
1262          * the first one is returned with new_op
1263          */
1264         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1265                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1266                 return (void*)(long)rc;
1267         }
1268
1269         /* execute a single queued request in the same thread */
1270         if( cri.op && !cri.nullop ) {
1271                 rc = (long)connection_operation( ctx, cri.op );
1272         } else if ( cri.func ) {
1273                 rc = (long)cri.func( ctx, cri.arg );
1274         }
1275
1276         return (void*)(long)rc;
1277 }
1278
1279 int connection_read_activate( ber_socket_t s )
1280 {
1281         int rc;
1282
1283         /*
1284          * suspend reading on this file descriptor until a connection processing
1285          * thread reads data on it. Otherwise the listener thread will repeatedly
1286          * submit the same event on it to the pool.
1287          */
1288         rc = slapd_clr_read( s, 0 );
1289         if ( rc )
1290                 return rc;
1291
1292         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1293                 connection_read_thread, (void *)(long)s );
1294
1295         if( rc != 0 ) {
1296                 Debug( LDAP_DEBUG_ANY,
1297                         "connection_read_activate(%d): submit failed (%d)\n",
1298                         s, rc, 0 );
1299         }
1300
1301         return rc;
1302 }
1303 #endif
1304
1305 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1306 static int
1307 connection_read( ber_socket_t s, conn_readinfo *cri )
1308 #else
1309 int connection_read(ber_socket_t s)
1310 #endif
1311 {
1312         int rc = 0;
1313         Connection *c;
1314
1315         assert( connections != NULL );
1316
1317         /* get (locked) connection */
1318         c = connection_get( s );
1319
1320         if( c == NULL ) {
1321                 Debug( LDAP_DEBUG_ANY,
1322                         "connection_read(%ld): no connection!\n",
1323                         (long) s, 0, 0 );
1324
1325                 return -1;
1326         }
1327
1328         c->c_n_read++;
1329
1330         if( c->c_conn_state == SLAP_C_CLOSING ) {
1331                 Debug( LDAP_DEBUG_TRACE,
1332                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1333                         s, c->c_connid, 0 );
1334                 connection_return( c );
1335                 return 0;
1336         }
1337
1338         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1339 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1340                 cri->func = c->c_clientfunc;
1341                 cri->arg = c->c_clientarg;
1342                 /* read should already be cleared */
1343 #else
1344                 slapd_clr_read( s, 0 );
1345                 ldap_pvt_thread_pool_submit( &connection_pool,
1346                         c->c_clientfunc, c->c_clientarg );
1347 #endif
1348                 connection_return( c );
1349                 return 0;
1350         }
1351
1352         Debug( LDAP_DEBUG_TRACE,
1353                 "connection_read(%d): checking for input on id=%lu\n",
1354                 s, c->c_connid, 0 );
1355
1356 #ifdef HAVE_TLS
1357         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1358                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1359                 if ( rc < 0 ) {
1360                         Debug( LDAP_DEBUG_TRACE,
1361                                 "connection_read(%d): TLS accept failure "
1362                                 "error=%d id=%lu, closing\n",
1363                                 s, rc, c->c_connid );
1364
1365                         c->c_needs_tls_accept = 0;
1366                         /* c_mutex is locked */
1367                         connection_closing( c, "TLS negotiation failure" );
1368                         connection_close( c );
1369                         connection_return( c );
1370                         return 0;
1371
1372                 } else if ( rc == 0 ) {
1373                         void *ssl;
1374                         struct berval authid = BER_BVNULL;
1375
1376                         c->c_needs_tls_accept = 0;
1377
1378                         /* we need to let SASL know */
1379                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1380
1381                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1382                         if( c->c_tls_ssf > c->c_ssf ) {
1383                                 c->c_ssf = c->c_tls_ssf;
1384                         }
1385
1386                         rc = dnX509peerNormalize( ssl, &authid );
1387                         if ( rc != LDAP_SUCCESS ) {
1388                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1389                                         "unable to get TLS client DN, error=%d id=%lu\n",
1390                                         s, rc, c->c_connid );
1391                         }
1392                         Statslog( LDAP_DEBUG_STATS,
1393                                 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1394                             c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1395                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1396                         if ( authid.bv_val ) free( authid.bv_val );
1397                 }
1398
1399                 /* if success and data is ready, fall thru to data input loop */
1400                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1401                 {
1402 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1403                         slapd_set_read( s, 1 );
1404 #endif
1405
1406                         connection_return( c );
1407                         return 0;
1408                 }
1409         }
1410 #endif
1411
1412 #ifdef HAVE_CYRUS_SASL
1413         if ( c->c_sasl_layers ) {
1414                 /* If previous layer is not removed yet, give up for now */
1415                 if ( !c->c_sasl_sockctx ) {
1416 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1417                         slapd_set_read( s, 1 );
1418 #endif
1419
1420                         connection_return( c );
1421                         return 0;
1422                 }
1423
1424                 c->c_sasl_layers = 0;
1425
1426                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1427                 if( rc != LDAP_SUCCESS ) {
1428                         Debug( LDAP_DEBUG_TRACE,
1429                                 "connection_read(%d): SASL install error "
1430                                 "error=%d id=%lu, closing\n",
1431                                 s, rc, c->c_connid );
1432
1433                         /* c_mutex is locked */
1434                         connection_closing( c, "SASL layer install failure" );
1435                         connection_close( c );
1436                         connection_return( c );
1437                         return 0;
1438                 }
1439         }
1440 #endif
1441
1442 #define CONNECTION_INPUT_LOOP 1
1443 /* #define      DATA_READY_LOOP 1 */
1444
1445         do {
1446                 /* How do we do this without getting into a busy loop ? */
1447 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1448                 rc = connection_input( c, cri );
1449 #else
1450                 rc = connection_input( c );
1451 #endif
1452         }
1453 #ifdef DATA_READY_LOOP
1454         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1455 #elif defined CONNECTION_INPUT_LOOP
1456         while(!rc);
1457 #else
1458         while(0);
1459 #endif
1460
1461         if( rc < 0 ) {
1462                 Debug( LDAP_DEBUG_CONNS,
1463                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1464                         s, rc, c->c_connid );
1465
1466                 /* c_mutex is locked */
1467                 connection_closing( c, conn_lost_str );
1468                 connection_close( c );
1469                 connection_return( c );
1470                 return 0;
1471         }
1472
1473 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1474         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1475                 slapd_set_write( s, 0 );
1476         }
1477
1478         slapd_set_read( s, 1 );
1479 #else
1480         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1481                 slapd_set_read( s, 1 );
1482         }
1483
1484         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1485                 slapd_set_write( s, 1 );
1486         }
1487 #endif
1488
1489         connection_return( c );
1490
1491         return 0;
1492 }
1493
1494 static int
1495 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1496 connection_input( Connection *conn , conn_readinfo *cri )
1497 #else
1498 connection_input( Connection *conn )
1499 #endif
1500 {
1501         Operation *op;
1502         ber_tag_t       tag;
1503         ber_len_t       len;
1504         ber_int_t       msgid;
1505         BerElement      *ber;
1506         int             rc;
1507 #ifdef LDAP_CONNECTIONLESS
1508         Sockaddr        peeraddr;
1509         char            *cdn = NULL;
1510 #endif
1511         char *defer = NULL;
1512
1513         if ( conn->c_currentber == NULL &&
1514                 ( conn->c_currentber = ber_alloc()) == NULL )
1515         {
1516                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1517                 return -1;
1518         }
1519
1520         sock_errset(0);
1521
1522 #ifdef LDAP_CONNECTIONLESS
1523         if ( conn->c_is_udp ) {
1524                 char peername[sizeof("IP=255.255.255.255:65336")];
1525
1526                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1527                 if (len != sizeof(struct sockaddr)) return 1;
1528
1529                 sprintf( peername, "IP=%s:%d",
1530                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1531                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1532                 Statslog( LDAP_DEBUG_STATS,
1533                         "conn=%lu UDP request from %s (%s) accepted.\n",
1534                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1535         }
1536 #endif
1537
1538         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1539         if ( tag != LDAP_TAG_MESSAGE ) {
1540                 int err = sock_errno();
1541                 ber_socket_t    sd;
1542
1543                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1544
1545                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1546                         /* log, close and send error */
1547                         Debug( LDAP_DEBUG_TRACE,
1548                                 "ber_get_next on fd %d failed errno=%d (%s)\n",
1549                         sd, err, sock_errstr(err) );
1550                         ber_free( conn->c_currentber, 1 );
1551                         conn->c_currentber = NULL;
1552
1553                         return -2;
1554                 }
1555                 return 1;
1556         }
1557
1558         ber = conn->c_currentber;
1559         conn->c_currentber = NULL;
1560
1561         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1562                 /* log, close and send error */
1563                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1564                 ber_free( ber, 1 );
1565                 return -1;
1566         }
1567
1568         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1569                 /* log, close and send error */
1570                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1571                 ber_free( ber, 1 );
1572
1573                 return -1;
1574         }
1575
1576 #ifdef LDAP_CONNECTIONLESS
1577         if( conn->c_is_udp ) {
1578                 if( tag == LBER_OCTETSTRING ) {
1579                         ber_get_stringa( ber, &cdn );
1580                         tag = ber_peek_tag(ber, &len);
1581                 }
1582                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1583                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1584                         ber_free( ber, 1 );
1585                         return 0;
1586                 }
1587         }
1588 #endif
1589
1590         if(tag == LDAP_REQ_BIND) {
1591                 /* immediately abandon all existing operations upon BIND */
1592                 connection_abandon( conn );
1593         }
1594
1595         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1596
1597         op->o_conn = conn;
1598         /* clear state if the connection is being reused from inactive */
1599         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1600                 memset( &conn->c_pagedresults_state, 0,
1601                         sizeof( conn->c_pagedresults_state ) );
1602         }
1603
1604         op->o_res_ber = NULL;
1605
1606 #ifdef LDAP_CONNECTIONLESS
1607         if (conn->c_is_udp) {
1608                 if ( cdn ) {
1609                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1610                         op->o_protocol = LDAP_VERSION2;
1611                 }
1612                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1613                 if (op->o_res_ber == NULL) return 1;
1614
1615                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1616                         sizeof(struct sockaddr), 0 );
1617
1618                 if (rc != sizeof(struct sockaddr)) {
1619                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1620                         return 1;
1621                 }
1622
1623                 if (op->o_protocol == LDAP_VERSION2) {
1624                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1625                         if (rc == -1) {
1626                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1627                                 return rc;
1628                         }
1629                 }
1630         }
1631 #endif /* LDAP_CONNECTIONLESS */
1632
1633         rc = 0;
1634
1635         /* Don't process requests when the conn is in the middle of a
1636          * Bind, or if it's closing. Also, don't let any single conn
1637          * use up all the available threads, and don't execute if we're
1638          * currently blocked on output. And don't execute if there are
1639          * already pending ops, let them go first.  Abandon operations
1640          * get exceptions to some, but not all, cases.
1641          */
1642         switch( tag ){
1643         default:
1644                 /* Abandon and Unbind are exempt from these checks */
1645                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1646                         defer = "closing";
1647                         break;
1648                 } else if (conn->c_writewaiter) {
1649                         defer = "awaiting write";
1650                         break;
1651                 } else if (conn->c_n_ops_pending) {
1652                         defer = "pending operations";
1653                         break;
1654                 }
1655                 /* FALLTHRU */
1656         case LDAP_REQ_ABANDON:
1657                 /* Unbind is exempt from these checks */
1658                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1659                         defer = "too many executing";
1660                         break;
1661                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1662                         defer = "binding";
1663                         break;
1664                 }
1665                 /* FALLTHRU */
1666         case LDAP_REQ_UNBIND:
1667                 break;
1668         }
1669
1670         if( defer ) {
1671                 int max = conn->c_dn.bv_len
1672                         ? slap_conn_max_pending_auth
1673                         : slap_conn_max_pending;
1674
1675                 Debug( LDAP_DEBUG_ANY,
1676                         "connection_input: conn=%lu deferring operation: %s\n",
1677                         conn->c_connid, defer, 0 );
1678                 conn->c_n_ops_pending++;
1679                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1680                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1681
1682         } else {
1683                 conn->c_n_ops_executing++;
1684
1685 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1686                 /*
1687                  * The first op will be processed in the same thread context,
1688                  * as long as there is only one op total.
1689                  * Subsequent ops will be submitted to the pool by
1690                  * calling connection_op_activate()
1691                  */
1692                 if ( cri->op == NULL ) {
1693                         /* the first incoming request */
1694                         connection_op_queue( op );
1695                         cri->op = op;
1696                 } else {
1697                         if ( !cri->nullop ) {
1698                                 cri->nullop = 1;
1699                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1700                                         connection_operation, (void *) cri->op );
1701                         }
1702                         connection_op_activate( op );
1703                 }
1704 #else
1705                 connection_op_activate( op );
1706 #endif
1707         }
1708
1709 #ifdef NO_THREADS
1710         if ( conn->c_struct_state != SLAP_C_USED ) {
1711                 /* connection must have got closed underneath us */
1712                 return 1;
1713         }
1714 #endif
1715
1716         assert( conn->c_struct_state == SLAP_C_USED );
1717         return rc;
1718 }
1719
1720 static int
1721 connection_resched( Connection *conn )
1722 {
1723         Operation *op;
1724
1725         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1726                 ber_socket_t    sd;
1727                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1728
1729                 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1730                         "attempting closing conn=%lu sd=%d\n",
1731                         conn->c_connid, sd, 0 );
1732                 connection_close( conn );
1733                 return 0;
1734         }
1735
1736         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1737                 /* other states need different handling */
1738                 return 0;
1739         }
1740
1741         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1742                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1743
1744                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1745                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1746
1747                 /* pending operations should not be marked for abandonment */
1748                 assert(!op->o_abandon);
1749
1750                 conn->c_n_ops_pending--;
1751                 conn->c_n_ops_executing++;
1752
1753                 connection_op_activate( op );
1754
1755                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1756         }
1757         return 0;
1758 }
1759
1760 static void
1761 connection_init_log_prefix( Operation *op )
1762 {
1763         if ( op->o_connid == (unsigned long)(-1) ) {
1764                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1765                         "conn=-1 op=%lu", op->o_opid );
1766
1767         } else {
1768                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1769                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1770         }
1771 }
1772
1773 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1774 {
1775         op->o_conn->c_sasl_bindop = NULL;
1776
1777         ch_free( op->o_callback );
1778         op->o_callback = NULL;
1779
1780         return SLAP_CB_CONTINUE;
1781 }
1782
1783 static int connection_bind_cb( Operation *op, SlapReply *rs )
1784 {
1785         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1786         if ( op->o_conn->c_conn_state == SLAP_C_BINDING )
1787                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1788         op->o_conn->c_sasl_bind_in_progress =
1789                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1790
1791         /* Moved here from bind.c due to ITS#4158 */
1792         op->o_conn->c_sasl_bindop = NULL;
1793         if ( op->orb_method == LDAP_AUTH_SASL ) {
1794                 if( rs->sr_err == LDAP_SUCCESS ) {
1795                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1796                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1797                                 /* edn is always normalized already */
1798                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1799                         }
1800                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1801                         BER_BVZERO( &op->orb_edn );
1802                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1803                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1804
1805                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1806                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1807                                 op->o_conn->c_ssf = op->orb_ssf;
1808                         }
1809
1810                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1811                                 ber_len_t max = sockbuf_max_incoming_auth;
1812                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1813                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1814                         }
1815
1816                         /* log authorization identity */
1817                         Statslog( LDAP_DEBUG_STATS,
1818                                 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1819                                 op->o_log_prefix,
1820                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1821                                 op->o_conn->c_authmech.bv_val,
1822                                 op->orb_ssf, op->o_conn->c_ssf );
1823
1824                         Debug( LDAP_DEBUG_TRACE,
1825                                 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1826                                 op->o_conn->c_authmech.bv_val,
1827                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1828                                 op->orb_ssf );
1829
1830                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1831                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1832                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1833                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1834                         }
1835                 }
1836         }
1837         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1838
1839         ch_free( op->o_callback );
1840         op->o_callback = NULL;
1841
1842         return SLAP_CB_CONTINUE;
1843 }
1844
1845 static void connection_op_queue( Operation *op )
1846 {
1847         ber_tag_t tag = op->o_tag;
1848
1849         if (tag == LDAP_REQ_BIND) {
1850                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1851                 sc->sc_response = connection_bind_cb;
1852                 sc->sc_cleanup = connection_bind_cleanup_cb;
1853                 sc->sc_next = op->o_callback;
1854                 op->o_callback = sc;
1855                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1856         }
1857
1858         if (!op->o_dn.bv_len) {
1859                 op->o_authz = op->o_conn->c_authz;
1860                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1861                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1862                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1863                 } else {
1864                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1865                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1866                 }
1867         }
1868
1869         op->o_authtype = op->o_conn->c_authtype;
1870         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1871
1872         if (!op->o_protocol) {
1873                 op->o_protocol = op->o_conn->c_protocol
1874                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1875         }
1876
1877         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1878                 op->o_protocol > LDAP_VERSION2)
1879         {
1880                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1881         }
1882
1883         op->o_connid = op->o_conn->c_connid;
1884         connection_init_log_prefix( op );
1885
1886         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1887 }
1888
1889 static int connection_op_activate( Operation *op )
1890 {
1891         int rc;
1892
1893         connection_op_queue( op );
1894
1895         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1896                 connection_operation, (void *) op );
1897
1898         if ( rc != 0 ) {
1899                 Debug( LDAP_DEBUG_ANY,
1900                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1901                         rc, op->o_connid, 0 );
1902                 /* should move op to pending list */
1903         }
1904
1905         return rc;
1906 }
1907
1908 int connection_write(ber_socket_t s)
1909 {
1910         Connection *c;
1911         Operation *op;
1912
1913         assert( connections != NULL );
1914
1915         slapd_clr_write( s, 0 );
1916
1917         c = connection_get( s );
1918         if( c == NULL ) {
1919                 Debug( LDAP_DEBUG_ANY,
1920                         "connection_write(%ld): no connection!\n",
1921                         (long)s, 0, 0 );
1922                 return -1;
1923         }
1924
1925         c->c_n_write++;
1926
1927         Debug( LDAP_DEBUG_TRACE,
1928                 "connection_write(%d): waking output for id=%lu\n",
1929                 s, c->c_connid, 0 );
1930         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1931
1932         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1933                 slapd_set_read( s, 1 );
1934         }
1935         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1936                 slapd_set_write( s, 1 );
1937         }
1938
1939         /* If there are ops pending because of a writewaiter,
1940          * start one up.
1941          */
1942         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1943                 if ( !c->c_writewaiter ) break;
1944                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1945
1946                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1947                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1948
1949                 /* pending operations should not be marked for abandonment */
1950                 assert(!op->o_abandon);
1951
1952                 c->c_n_ops_pending--;
1953                 c->c_n_ops_executing++;
1954
1955                 connection_op_activate( op );
1956
1957                 break;
1958         }
1959
1960         connection_return( c );
1961         return 0;
1962 }
1963
1964 #ifdef LDAP_SLAPI
1965 typedef struct conn_fake_extblock {
1966         void *eb_conn;
1967         void *eb_op;
1968 } conn_fake_extblock;
1969
1970 static void
1971 connection_fake_destroy(
1972         void *key,
1973         void *data )
1974 {
1975         Connection conn = {0};
1976         Operation op = {0};
1977         Opheader ohdr = {0};
1978
1979         conn_fake_extblock *eb = data;
1980
1981         op.o_hdr = &ohdr;
1982         op.o_hdr->oh_extensions = eb->eb_op;
1983         conn.c_extensions = eb->eb_conn;
1984         op.o_conn = &conn;
1985         conn.c_connid = -1;
1986         op.o_connid = -1;
1987
1988         ber_memfree_x( eb, NULL );
1989         slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1990         slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1991 }
1992 #endif
1993
1994 void
1995 connection_fake_init(
1996         Connection *conn,
1997         OperationBuffer *opbuf,
1998         void *ctx )
1999 {
2000         connection_fake_init2( conn, opbuf, ctx, 1 );
2001 }
2002
2003 void
2004 connection_fake_init2(
2005         Connection *conn,
2006         OperationBuffer *opbuf,
2007         void *ctx,
2008         int newmem )
2009 {
2010         Operation *op = (Operation *) opbuf;
2011
2012         conn->c_connid = -1;
2013         conn->c_send_ldap_result = slap_send_ldap_result;
2014         conn->c_send_search_entry = slap_send_search_entry;
2015         conn->c_send_search_reference = slap_send_search_reference;
2016         conn->c_listener = (Listener *)&dummy_list;
2017         conn->c_peer_domain = slap_empty_bv;
2018         conn->c_peer_name = slap_empty_bv;
2019
2020         memset( opbuf, 0, sizeof( *opbuf ));
2021         op->o_hdr = &opbuf->ob_hdr;
2022         op->o_controls = opbuf->ob_controls;
2023
2024         /* set memory context */
2025         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2026                 newmem );
2027         op->o_tmpmfuncs = &slap_sl_mfuncs;
2028         op->o_threadctx = ctx;
2029         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2030
2031         op->o_conn = conn;
2032         op->o_connid = op->o_conn->c_connid;
2033         connection_init_log_prefix( op );
2034
2035 #ifdef LDAP_SLAPI
2036         if ( slapi_plugins_used ) {
2037                 conn_fake_extblock *eb;
2038                 void *ebx = NULL;
2039
2040                 /* Use thread keys to make sure these eventually get cleaned up */
2041                 if ( ldap_pvt_thread_pool_getkey( ctx, connection_fake_init, &ebx,
2042                         NULL )) {
2043                         eb = ch_malloc( sizeof( *eb ));
2044                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2045                         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2046                         eb->eb_conn = conn->c_extensions;
2047                         eb->eb_op = op->o_hdr->oh_extensions;
2048                         ldap_pvt_thread_pool_setkey( ctx, connection_fake_init, eb,
2049                                 connection_fake_destroy );
2050                 } else {
2051                         eb = ebx;
2052                         conn->c_extensions = eb->eb_conn;
2053                         op->o_hdr->oh_extensions = eb->eb_op;
2054                 }
2055         }
2056 #endif /* LDAP_SLAPI */
2057
2058         slap_op_time( &op->o_time, &op->o_tincr );
2059 }
2060
2061 void
2062 connection_assign_nextid( Connection *conn )
2063 {
2064         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2065         conn->c_connid = conn_nextid++;
2066         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2067 }