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 1998-2006 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_USED ) {
 200                         continue;
 201                 }
 202                 /* give persistent clients a chance to cleanup */
 203                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 204                         ldap_pvt_thread_pool_submit( &connection_pool,
 205                         connections[i].c_clientfunc, connections[i].c_clientarg );
 206                         continue;
 207                 }
 208
 209                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 210
 211                 /* c_mutex is locked */
 212                 connection_closing( &connections[i], "slapd shutdown" );
 213                 connection_close( &connections[i] );
 214
 215                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 216         }
 217
 218         return 0;
 219 }
 220
 221 /*
 222  * Timeout idle connections.
 223  */
 224 int connections_timeout_idle(time_t now)
 225 {
 226         int i = 0;
 227         int connindex;
 228         Connection* c;
 229
 230         for( c = connection_first( &connindex );
 231                 c != NULL;
 232                 c = connection_next( c, &connindex ) )
 233         {
 234                 /* Don't timeout a slow-running request or a persistent
 235                  * outbound connection */
 236                 if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
 237                         continue;
 238                 }
 239
 240                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 241                         /* close it */
 242                         connection_closing( c, "idletimeout" );
 243                         connection_close( c );
 244                         i++;
 245                 }
 246         }
 247         connection_done( c );
 248
 249         return i;
 250 }
 251
 252 static Connection* connection_get( ber_socket_t s )
 253 {
 254         Connection *c;
 255
 256         Debug( LDAP_DEBUG_ARGS,
 257                 "connection_get(%ld)\n",
 258                 (long) s, 0, 0 );
 259
 260         assert( connections != NULL );
 261
 262         if(s == AC_SOCKET_INVALID) return NULL;
 263
 264 #ifndef HAVE_WINSOCK
 265         assert( s < dtblsize );
 266         c = &connections[s];
 267
 268 #else
 269         c = NULL;
 270         {
 271                 ber_socket_t i, sd;
 272
 273                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 274                 for(i=0; i<dtblsize; i++) {
 275                         if( connections[i].c_struct_state == SLAP_C_PENDING )
 276                                 continue;
 277
 278                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 279                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 280                                 assert( connections[i].c_sb == 0 );
 281                                 break;
 282                         }
 283
 284                         ber_sockbuf_ctrl( connections[i].c_sb,
 285                                 LBER_SB_OPT_GET_FD, &sd );
 286
 287                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 288                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 289                                 assert( sd == AC_SOCKET_INVALID );
 290                                 continue;
 291                         }
 292
 293                         /* state can actually change from used -> unused by resched,
 294                          * so don't assert details here.
 295                          */
 296
 297                         if( sd == s ) {
 298                                 c = &connections[i];
 299                                 break;
 300                         }
 301                 }
 302                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 303         }
 304 #endif
 305
 306         if( c != NULL ) {
 307                 ber_socket_t    sd;
 308
 309                 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 310
 311                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 312
 313                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 314                 if( c->c_struct_state != SLAP_C_USED ) {
 315                         /* connection must have been closed due to resched */
 316
 317                         assert( c->c_conn_state == SLAP_C_INVALID );
 318                         assert( sd == AC_SOCKET_INVALID );
 319
 320                         Debug( LDAP_DEBUG_TRACE,
 321                                 "connection_get(%d): connection not used\n",
 322                                 s, 0, 0 );
 323
 324                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 325                         return NULL;
 326                 }
 327
 328                 Debug( LDAP_DEBUG_TRACE,
 329                         "connection_get(%d): got connid=%lu\n",
 330                         s, c->c_connid, 0 );
 331
 332                 c->c_n_get++;
 333
 334                 assert( c->c_struct_state == SLAP_C_USED );
 335                 assert( c->c_conn_state != SLAP_C_INVALID );
 336                 assert( sd != AC_SOCKET_INVALID );
 337
 338 #ifndef SLAPD_MONITOR
 339                 if ( global_idletimeout > 0 )
 340 #endif /* ! SLAPD_MONITOR */
 341                 {
 342                         c->c_activitytime = slap_get_time();
 343                 }
 344         }
 345
 346         return c;
 347 }
 348
 349 static void connection_return( Connection *c )
 350 {
 351         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 352 }
 353
 354 long connection_init(
 355         ber_socket_t s,
 356         Listener *listener,
 357         const char* dnsname,
 358         const char* peername,
 359         int flags,
 360         slap_ssf_t ssf,
 361         struct berval *authid )
 362 {
 363         unsigned long id;
 364         Connection *c;
 365         int doinit = 0;
 366
 367         assert( connections != NULL );
 368
 369         assert( listener != NULL );
 370         assert( dnsname != NULL );
 371         assert( peername != NULL );
 372
 373 #ifndef HAVE_TLS
 374         assert( flags != CONN_IS_TLS );
 375 #endif
 376
 377         if( s == AC_SOCKET_INVALID ) {
 378                 Debug( LDAP_DEBUG_ANY,
 379                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 380                 return -1;
 381         }
 382
 383         assert( s >= 0 );
 384 #ifndef HAVE_WINSOCK
 385         assert( s < dtblsize );
 386         c = &connections[s];
 387         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 388                 doinit = 1;
 389         } else {
 390                 assert( c->c_struct_state == SLAP_C_UNUSED );
 391         }
 392 #else
 393         {
 394                 ber_socket_t i;
 395                 c = NULL;
 396
 397                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 398                 for( i=0; i < dtblsize; i++) {
 399                         ber_socket_t    sd;
 400
 401                         if ( connections[i].c_struct_state == SLAP_C_PENDING )
 402                                 continue;
 403
 404                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 405                                 assert( connections[i].c_sb == 0 );
 406                                 c = &connections[i];
 407                                 c->c_struct_state = SLAP_C_PENDING;
 408                                 doinit = 1;
 409                                 break;
 410                         }
 411
 412                         sd = AC_SOCKET_INVALID;
 413                         if (connections[i].c_sb != NULL) {
 414                                 ber_sockbuf_ctrl( connections[i].c_sb,
 415                                         LBER_SB_OPT_GET_FD, &sd );
 416                         }
 417
 418                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 419                                 assert( sd == AC_SOCKET_INVALID );
 420                                 c = &connections[i];
 421                                 c->c_struct_state = SLAP_C_PENDING;
 422                                 break;
 423                         }
 424
 425                         if( connections[i].c_conn_state == SLAP_C_CLIENT ) continue;
 426
 427                         assert( connections[i].c_struct_state == SLAP_C_USED );
 428                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 429                         assert( sd != AC_SOCKET_INVALID );
 430                 }
 431                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 432
 433                 if( c == NULL ) {
 434                         Debug( LDAP_DEBUG_ANY,
 435                                 "connection_init(%d): connection table full "
 436                                 "(%d/%d)\n", s, i, dtblsize);
 437                         return -1;
 438                 }
 439         }
 440 #endif
 441
 442         if( doinit ) {
 443                 c->c_send_ldap_result = slap_send_ldap_result;
 444                 c->c_send_search_entry = slap_send_search_entry;
 445                 c->c_send_search_reference = slap_send_search_reference;
 446                 c->c_send_ldap_extended = slap_send_ldap_extended;
 447                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 448
 449                 BER_BVZERO( &c->c_authmech );
 450                 BER_BVZERO( &c->c_dn );
 451                 BER_BVZERO( &c->c_ndn );
 452
 453                 c->c_listener = NULL;
 454                 BER_BVZERO( &c->c_peer_domain );
 455                 BER_BVZERO( &c->c_peer_name );
 456
 457                 LDAP_STAILQ_INIT(&c->c_ops);
 458                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 459
 460 #ifdef LDAP_X_TXN
 461                 c->c_txn = CONN_TXN_INACTIVE;
 462                 c->c_txn_backend = NULL;
 463                 LDAP_STAILQ_INIT(&c->c_txn_ops);
 464 #endif
 465
 466                 BER_BVZERO( &c->c_sasl_bind_mech );
 467                 c->c_sasl_done = 0;
 468                 c->c_sasl_authctx = NULL;
 469                 c->c_sasl_sockctx = NULL;
 470                 c->c_sasl_extra = NULL;
 471                 c->c_sasl_bindop = NULL;
 472
 473                 c->c_sb = ber_sockbuf_alloc( );
 474
 475                 {
 476                         ber_len_t max = sockbuf_max_incoming;
 477                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 478                 }
 479
 480                 c->c_currentber = NULL;
 481
 482                 /* should check status of thread calls */
 483                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 484                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 485                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 486
 487 #ifdef LDAP_SLAPI
 488                 if ( slapi_plugins_used ) {
 489                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 490                 }
 491 #endif
 492         }
 493
 494         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 495
 496         assert( BER_BVISNULL( &c->c_authmech ) );
 497         assert( BER_BVISNULL( &c->c_dn ) );
 498         assert( BER_BVISNULL( &c->c_ndn ) );
 499         assert( c->c_listener == NULL );
 500         assert( BER_BVISNULL( &c->c_peer_domain ) );
 501         assert( BER_BVISNULL( &c->c_peer_name ) );
 502         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 503         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 504 #ifdef LDAP_X_TXN
 505         assert( c->c_txn == CONN_TXN_INACTIVE );
 506         assert( c->c_txn_backend == NULL );
 507         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 508 #endif
 509         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 510         assert( c->c_sasl_done == 0 );
 511         assert( c->c_sasl_authctx == NULL );
 512         assert( c->c_sasl_sockctx == NULL );
 513         assert( c->c_sasl_extra == NULL );
 514         assert( c->c_sasl_bindop == NULL );
 515         assert( c->c_currentber == NULL );
 516         assert( c->c_writewaiter == 0);
 517
 518         c->c_listener = listener;
 519
 520         if ( flags == CONN_IS_CLIENT ) {
 521                 c->c_conn_state = SLAP_C_CLIENT;
 522                 c->c_struct_state = SLAP_C_USED;
 523                 c->c_close_reason = "?";                        /* should never be needed */
 524                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
 525                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 526
 527                 return 0;
 528         }
 529
 530         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 531         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 532
 533         c->c_n_ops_received = 0;
 534         c->c_n_ops_executing = 0;
 535         c->c_n_ops_pending = 0;
 536         c->c_n_ops_completed = 0;
 537
 538         c->c_n_get = 0;
 539         c->c_n_read = 0;
 540         c->c_n_write = 0;
 541
 542         /* set to zero until bind, implies LDAP_VERSION3 */
 543         c->c_protocol = 0;
 544
 545 #ifndef SLAPD_MONITOR
 546         if ( global_idletimeout > 0 )
 547 #endif /* ! SLAPD_MONITOR */
 548         {
 549                 c->c_activitytime = c->c_starttime = slap_get_time();
 550         }
 551
 552 #ifdef LDAP_CONNECTIONLESS
 553         c->c_is_udp = 0;
 554         if( flags == CONN_IS_UDP ) {
 555                 c->c_is_udp = 1;
 556 #ifdef LDAP_DEBUG
 557                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 558                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 559 #endif
 560                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 561                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 562                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 563                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 564         } else
 565 #endif
 566         {
 567 #ifdef LDAP_DEBUG
 568                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 569                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 570 #endif
 571                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 572                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 573         }
 574
 575 #ifdef LDAP_DEBUG
 576         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 577                 INT_MAX, (void*)"ldap_" );
 578 #endif
 579
 580         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 581                 c /* non-NULL */ ) < 0 )
 582         {
 583                 Debug( LDAP_DEBUG_ANY,
 584                         "connection_init(%d, %s): set nonblocking failed\n",
 585                         s, c->c_peer_name.bv_val, 0 );
 586         }
 587
 588         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 589         id = c->c_connid = conn_nextid++;
 590         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 591
 592         c->c_conn_state = SLAP_C_INACTIVE;
 593         c->c_struct_state = SLAP_C_USED;
 594         c->c_close_reason = "?";                        /* should never be needed */
 595
 596         c->c_ssf = c->c_transport_ssf = ssf;
 597         c->c_tls_ssf = 0;
 598
 599 #ifdef HAVE_TLS
 600         if ( flags == CONN_IS_TLS ) {
 601                 c->c_is_tls = 1;
 602                 c->c_needs_tls_accept = 1;
 603         } else {
 604                 c->c_is_tls = 0;
 605                 c->c_needs_tls_accept = 0;
 606         }
 607 #endif
 608
 609         slap_sasl_open( c, 0 );
 610         slap_sasl_external( c, ssf, authid );
 611
 612         slapd_add_internal( s, 1 );
 613         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 614
 615         backend_connection_init(c);
 616
 617         return id;
 618 }
 619
 620 void connection2anonymous( Connection *c )
 621 {
 622         assert( connections != NULL );
 623         assert( c != NULL );
 624
 625         {
 626                 ber_len_t max = sockbuf_max_incoming;
 627                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 628         }
 629
 630         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 631                 ch_free(c->c_authmech.bv_val);
 632         }
 633         BER_BVZERO( &c->c_authmech );
 634
 635         if ( !BER_BVISNULL( &c->c_dn ) ) {
 636                 ch_free(c->c_dn.bv_val);
 637         }
 638         BER_BVZERO( &c->c_dn );
 639
 640         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 641                 ch_free(c->c_ndn.bv_val);
 642         }
 643         BER_BVZERO( &c->c_ndn );
 644
 645         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 646                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 647         }
 648         BER_BVZERO( &c->c_sasl_authz_dn );
 649
 650         c->c_authz_backend = NULL;
 651 }
 652
 653 static void
 654 connection_destroy( Connection *c )
 655 {
 656         ber_socket_t    sd, inval = AC_SOCKET_INVALID;
 657         unsigned long   connid;
 658         const char              *close_reason;
 659         Sockbuf                 *sb;
 660
 661         assert( connections != NULL );
 662         assert( c != NULL );
 663         assert( c->c_struct_state != SLAP_C_UNUSED );
 664         assert( c->c_conn_state != SLAP_C_INVALID );
 665         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 666         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 667 #ifdef LDAP_X_TXN
 668         assert( c->c_txn == CONN_TXN_INACTIVE );
 669         assert( c->c_txn_backend == NULL );
 670         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 671 #endif
 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         close_reason = c->c_close_reason;
 677
 678         ldap_pvt_thread_mutex_lock( &connections_mutex );
 679         c->c_struct_state = SLAP_C_PENDING;
 680         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 681
 682         backend_connection_destroy(c);
 683
 684         c->c_protocol = 0;
 685         c->c_connid = -1;
 686
 687         c->c_activitytime = c->c_starttime = 0;
 688
 689         connection2anonymous( c );
 690         c->c_listener = NULL;
 691
 692         if(c->c_peer_domain.bv_val != NULL) {
 693                 free(c->c_peer_domain.bv_val);
 694         }
 695         BER_BVZERO( &c->c_peer_domain );
 696         if(c->c_peer_name.bv_val != NULL) {
 697                 free(c->c_peer_name.bv_val);
 698         }
 699         BER_BVZERO( &c->c_peer_name );
 700
 701         c->c_sasl_bind_in_progress = 0;
 702         if(c->c_sasl_bind_mech.bv_val != NULL) {
 703                 free(c->c_sasl_bind_mech.bv_val);
 704         }
 705         BER_BVZERO( &c->c_sasl_bind_mech );
 706
 707         slap_sasl_close( c );
 708
 709         if ( c->c_currentber != NULL ) {
 710                 ber_free( c->c_currentber, 1 );
 711                 c->c_currentber = NULL;
 712         }
 713
 714
 715 #ifdef LDAP_SLAPI
 716         /* call destructors, then constructors; avoids unnecessary allocation */
 717         if ( slapi_plugins_used ) {
 718                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 719         }
 720 #endif
 721
 722         c->c_conn_state = SLAP_C_INVALID;
 723         c->c_struct_state = SLAP_C_UNUSED;
 724         c->c_close_reason = "?";                        /* should never be needed */
 725
 726         sb = c->c_sb;
 727         c->c_sb = ber_sockbuf_alloc( );
 728         {
 729                 ber_len_t max = sockbuf_max_incoming;
 730                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 731         }
 732
 733         ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
 734         slapd_sd_lock();
 735
 736         ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &inval );
 737         ber_sockbuf_free( sb );
 738
 739         /* c must be fully reset by this point; when we call slapd_remove
 740          * it may get immediately reused by a new connection.
 741          */
 742         if ( sd != AC_SOCKET_INVALID ) {
 743                 slapd_remove( sd, 1, 0, 1 );
 744
 745                 Statslog( LDAP_DEBUG_STATS, (close_reason
 746                                                                          ? "conn=%lu fd=%ld closed (%s)\n"
 747                                                                          : "conn=%lu fd=%ld closed\n"),
 748                         connid, (long) sd, close_reason, 0, 0 );
 749         } else {
 750                 slapd_sd_unlock();
 751         }
 752 }
 753
 754 int connection_state_closing( Connection *c )
 755 {
 756         /* c_mutex must be locked by caller */
 757
 758         int state;
 759         assert( c != NULL );
 760         assert( c->c_struct_state == SLAP_C_USED );
 761
 762         state = c->c_conn_state;
 763
 764         assert( state != SLAP_C_INVALID );
 765
 766         return state == SLAP_C_CLOSING;
 767 }
 768
 769 static void connection_abandon( Connection *c )
 770 {
 771         /* c_mutex must be locked by caller */
 772
 773         Operation *o, *next, op = {0};
 774         Opheader ohdr = {0};
 775         SlapReply rs = {0};
 776
 777         op.o_hdr = &ohdr;
 778         op.o_conn = c;
 779         op.o_connid = c->c_connid;
 780         op.o_tag = LDAP_REQ_ABANDON;
 781
 782         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 783                 next = LDAP_STAILQ_NEXT( o, o_next );
 784                 op.orn_msgid = o->o_msgid;
 785                 o->o_abandon = 1;
 786                 op.o_bd = frontendDB;
 787                 frontendDB->be_abandon( &op, &rs );
 788         }
 789
 790 #ifdef LDAP_X_TXN
 791         /* remove operations in pending transaction */
 792         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 793                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 794                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 795                 slap_op_free( o );
 796         }
 797
 798         /* clear transaction */
 799         c->c_txn_backend = NULL;
 800         c->c_txn = CONN_TXN_INACTIVE;
 801 #endif
 802
 803         /* remove pending operations */
 804         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 805                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 806                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 807                 slap_op_free( o );
 808         }
 809 }
 810
 811 void connection_closing( Connection *c, const char *why )
 812 {
 813         assert( connections != NULL );
 814         assert( c != NULL );
 815         assert( c->c_struct_state == SLAP_C_USED );
 816         assert( c->c_conn_state != SLAP_C_INVALID );
 817
 818         /* c_mutex must be locked by caller */
 819
 820         if( c->c_conn_state != SLAP_C_CLOSING ) {
 821                 ber_socket_t    sd;
 822
 823                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 824                 Debug( LDAP_DEBUG_TRACE,
 825                         "connection_closing: readying conn=%lu sd=%d for close\n",
 826                         c->c_connid, sd, 0 );
 827                 /* update state to closing */
 828                 c->c_conn_state = SLAP_C_CLOSING;
 829                 c->c_close_reason = why;
 830
 831                 /* don't listen on this port anymore */
 832                 slapd_clr_read( sd, 0 );
 833
 834                 /* abandon active operations */
 835                 connection_abandon( c );
 836
 837                 /* wake write blocked operations */
 838                 slapd_clr_write( sd, 1 );
 839                 if ( c->c_writewaiter ) {
 840                         ldap_pvt_thread_cond_signal( &c->c_write_cv );
 841                 }
 842
 843         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 844                 /* Client closed connection after doing Unbind. */
 845                 c->c_close_reason = NULL;
 846         }
 847 }
 848
 849 static void connection_close( Connection *c )
 850 {
 851         ber_socket_t    sd;
 852
 853         assert( connections != NULL );
 854         assert( c != NULL );
 855         assert( c->c_struct_state == SLAP_C_USED );
 856         assert( c->c_conn_state == SLAP_C_CLOSING );
 857
 858         /* note: c_mutex should be locked by caller */
 859
 860         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 861         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 862                 Debug( LDAP_DEBUG_TRACE,
 863                         "connection_close: deferring conn=%lu sd=%d\n",
 864                         c->c_connid, sd, 0 );
 865                 return;
 866         }
 867
 868         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 869                 c->c_connid, sd, 0 );
 870         connection_destroy( c );
 871 }
 872
 873 unsigned long connections_nextid(void)
 874 {
 875         unsigned long id;
 876         assert( connections != NULL );
 877
 878         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 879
 880         id = conn_nextid;
 881
 882         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 883
 884         return id;
 885 }
 886
 887 Connection* connection_first( ber_socket_t *index )
 888 {
 889         assert( connections != NULL );
 890         assert( index != NULL );
 891
 892         ldap_pvt_thread_mutex_lock( &connections_mutex );
 893         for( *index = 0; *index < dtblsize; (*index)++) {
 894                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 895                         break;
 896                 }
 897         }
 898         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 899
 900         return connection_next(NULL, index);
 901 }
 902
 903 Connection* connection_next( Connection *c, ber_socket_t *index )
 904 {
 905         assert( connections != NULL );
 906         assert( index != NULL );
 907         assert( *index <= dtblsize );
 908
 909         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 910
 911         c = NULL;
 912
 913         ldap_pvt_thread_mutex_lock( &connections_mutex );
 914         for(; *index < dtblsize; (*index)++) {
 915                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 916                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 917                         break;
 918                 }
 919
 920                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 921                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 922                         c = &connections[(*index)++];
 923                         if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 924                                 /* avoid deadlock */
 925                                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 926                                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 927                                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 928                                 if ( c->c_struct_state != SLAP_C_USED ) {
 929                                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 930                                         c = NULL;
 931                                         continue;
 932                                 }
 933                         }
 934                         break;
 935                 }
 936
 937                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 938                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 939         }
 940
 941         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 942         return c;
 943 }
 944
 945 void connection_done( Connection *c )
 946 {
 947         assert( connections != NULL );
 948
 949         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 950 }
 951
 952 /*
 953  * connection_activity - handle the request operation op on connection
 954  * conn.  This routine figures out what kind of operation it is and
 955  * calls the appropriate stub to handle it.
 956  */
 957
 958 #ifdef SLAPD_MONITOR
 959 /* FIXME: returns 0 in case of failure */
 960 #define INCR_OP_INITIATED(index) \
 961         do { \
 962                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
 963                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated_[(index)], 1); \
 964                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
 965         } while (0)
 966 #define INCR_OP_COMPLETED(index) \
 967         do { \
 968                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
 969                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
 970                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed_[(index)], 1); \
 971                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
 972         } while (0)
 973 #else /* !SLAPD_MONITOR */
 974 #define INCR_OP_INITIATED(index) do { } while (0)
 975 #define INCR_OP_COMPLETED(index) \
 976         do { \
 977                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
 978                 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
 979                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
 980         } while (0)
 981 #endif /* !SLAPD_MONITOR */
 982
 983 /*
 984  * NOTE: keep in sync with enum in slapd.h
 985  */
 986 static BI_op_func *opfun[] = {
 987         do_bind,
 988         do_unbind,
 989         do_add,
 990         do_delete,
 991         do_modrdn,
 992         do_modify,
 993         do_compare,
 994         do_search,
 995         do_abandon,
 996         do_extended,
 997         NULL
 998 };
 999
1000 static void *
1001 connection_operation( void *ctx, void *arg_v )
1002 {
1003         int rc = LDAP_OTHER;
1004         Operation *op = arg_v;
1005         SlapReply rs = {REP_RESULT};
1006         ber_tag_t tag = op->o_tag;
1007         int opidx = -1;
1008         Connection *conn = op->o_conn;
1009         void *memctx = NULL;
1010         void *memctx_null = NULL;
1011         ber_len_t memsiz;
1012
1013         ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex );
1014         /* FIXME: returns 0 in case of failure */
1015         ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated, 1);
1016         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex );
1017
1018         op->o_threadctx = ctx;
1019         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1020
1021         switch ( tag ) {
1022         case LDAP_REQ_BIND:
1023         case LDAP_REQ_UNBIND:
1024         case LDAP_REQ_ADD:
1025         case LDAP_REQ_DELETE:
1026         case LDAP_REQ_MODDN:
1027         case LDAP_REQ_MODIFY:
1028         case LDAP_REQ_COMPARE:
1029         case LDAP_REQ_SEARCH:
1030         case LDAP_REQ_ABANDON:
1031         case LDAP_REQ_EXTENDED:
1032                 break;
1033         default:
1034                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1035                         "conn %lu unknown LDAP request 0x%lx\n",
1036                         conn->c_connid, tag, 0 );
1037                 op->o_tag = LBER_ERROR;
1038                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1039                 rs.sr_text = "unknown LDAP request";
1040                 send_ldap_disconnect( op, &rs );
1041                 rc = SLAPD_DISCONNECT;
1042                 goto operations_error;
1043         }
1044
1045         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1046                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1047                         "error: SASL bind in progress (tag=%ld).\n",
1048                         (long) tag, 0, 0 );
1049                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1050                         "SASL bind in progress" );
1051                 rc = LDAP_OPERATIONS_ERROR;
1052                 goto operations_error;
1053         }
1054
1055 #ifdef LDAP_X_TXN
1056         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1057                 ( tag == LDAP_REQ_ADD ) ||
1058                 ( tag == LDAP_REQ_DELETE ) ||
1059                 ( tag == LDAP_REQ_MODIFY ) ||
1060                 ( tag == LDAP_REQ_MODRDN )))
1061         {
1062                 /* Disable SLAB allocator for all update operations
1063                         issued inside of a transaction */
1064                 op->o_tmpmemctx = NULL;
1065                 op->o_tmpmfuncs = &ch_mfuncs;
1066         } else
1067 #endif
1068         {
1069         /* We can use Thread-Local storage for most mallocs. We can
1070          * also use TL for ber parsing, but not on Add or Modify.
1071          */
1072 #if 0
1073         memsiz = ber_len( op->o_ber ) * 64;
1074         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1075 #endif
1076         memsiz = SLAP_SLAB_SIZE;
1077
1078         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx );
1079         op->o_tmpmemctx = memctx;
1080         op->o_tmpmfuncs = &slap_sl_mfuncs;
1081         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1082                 /* Note - the ber and its buffer are already allocated from
1083                  * regular memory; this only affects subsequent mallocs that
1084                  * ber_scanf may invoke.
1085                  */
1086                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1087         }
1088         }
1089
1090         switch ( tag ) {
1091         case LDAP_REQ_BIND:
1092                 opidx = SLAP_OP_BIND;
1093                 break;
1094
1095         case LDAP_REQ_UNBIND:
1096                 opidx = SLAP_OP_UNBIND;
1097                 break;
1098
1099         case LDAP_REQ_ADD:
1100                 opidx = SLAP_OP_ADD;
1101                 break;
1102
1103         case LDAP_REQ_DELETE:
1104                 opidx = SLAP_OP_DELETE;
1105                 break;
1106
1107         case LDAP_REQ_MODRDN:
1108                 opidx = SLAP_OP_MODRDN;
1109                 break;
1110
1111         case LDAP_REQ_MODIFY:
1112                 opidx = SLAP_OP_MODIFY;
1113                 break;
1114
1115         case LDAP_REQ_COMPARE:
1116                 opidx = SLAP_OP_COMPARE;
1117                 break;
1118
1119         case LDAP_REQ_SEARCH:
1120                 opidx = SLAP_OP_SEARCH;
1121                 break;
1122
1123         case LDAP_REQ_ABANDON:
1124                 opidx = SLAP_OP_ABANDON;
1125                 break;
1126
1127         case LDAP_REQ_EXTENDED:
1128                 opidx = SLAP_OP_EXTENDED;
1129                 break;
1130
1131         default:
1132                 /* not reachable */
1133                 assert( 0 );
1134         }
1135
1136         assert( opidx > -1 );
1137         INCR_OP_INITIATED( opidx );
1138         rc = (*(opfun[opidx]))( op, &rs );
1139
1140 operations_error:
1141         if ( rc == SLAPD_DISCONNECT ) {
1142                 tag = LBER_ERROR;
1143
1144         } else if ( opidx > -1 ) {
1145                 /* increment completed operations count
1146                  * only if operation was initiated
1147                  * and rc != SLAPD_DISCONNECT */
1148                 INCR_OP_COMPLETED( opidx );
1149         }
1150
1151         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1152                 if ( rc == SLAPD_ABANDON ) {
1153                         op->o_cancel = SLAP_CANCEL_ACK;
1154                 } else {
1155                         op->o_cancel = LDAP_TOO_LATE;
1156                 }
1157         }
1158         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1159                 op->o_cancel != SLAP_CANCEL_DONE )
1160         {
1161                 ldap_pvt_thread_yield();
1162         }
1163
1164         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1165
1166         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1167
1168         LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1169         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1170         slap_op_free( op );
1171         conn->c_n_ops_executing--;
1172         conn->c_n_ops_completed++;
1173
1174         switch( tag ) {
1175         case LBER_ERROR:
1176         case LDAP_REQ_UNBIND:
1177                 /* c_mutex is locked */
1178                 connection_closing( conn,
1179                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1180                 break;
1181         }
1182
1183         connection_resched( conn );
1184         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1185         return NULL;
1186 }
1187
1188 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1189
1190 int connection_client_setup(
1191         ber_socket_t s,
1192         ldap_pvt_thread_start_t *func,
1193         void *arg )
1194 {
1195         int rc;
1196         Connection *c;
1197
1198         rc = connection_init( s, (Listener *)&dummy_list, "", "",
1199                 CONN_IS_CLIENT, 0, NULL );
1200         if ( rc < 0 ) return -1;
1201
1202         c = connection_get( s );
1203         c->c_clientfunc = func;
1204         c->c_clientarg = arg;
1205
1206         slapd_add_internal( s, 0 );
1207         slapd_set_read( s, 1 );
1208         connection_return( c );
1209         return 0;
1210 }
1211
1212 void connection_client_enable(
1213         ber_socket_t s )
1214 {
1215         slapd_set_read( s, 1 );
1216 }
1217
1218 void connection_client_stop(
1219         ber_socket_t s )
1220 {
1221         Connection *c;
1222         ber_socket_t inval = AC_SOCKET_INVALID;
1223
1224         /* get (locked) connection */
1225         c = connection_get( s );
1226
1227         assert( c->c_conn_state == SLAP_C_CLIENT );
1228
1229         c->c_listener = NULL;
1230         c->c_conn_state = SLAP_C_INVALID;
1231         c->c_struct_state = SLAP_C_UNUSED;
1232         c->c_close_reason = "?";                        /* should never be needed */
1233         slapd_sd_lock();
1234         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &inval );
1235         ber_sockbuf_free( c->c_sb );
1236         slapd_remove( s, 0, 1, 1 );
1237         c->c_sb = ber_sockbuf_alloc( );
1238         {
1239                 ber_len_t max = sockbuf_max_incoming;
1240                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1241         }
1242
1243         connection_return( c );
1244 }
1245
1246 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1247
1248 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1249
1250 static void* connection_read_thread( void* ctx, void* argv )
1251 {
1252         int rc ;
1253         conn_readinfo cri = { NULL, NULL, NULL, 0 };
1254         ber_socket_t s = (long)argv;
1255
1256         /*
1257          * read incoming LDAP requests. If there is more than one,
1258          * the first one is returned with new_op
1259          */
1260         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1261                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1262                 return (void*)(long)rc;
1263         }
1264
1265         /* execute a single queued request in the same thread */
1266         if( cri.op && !cri.nullop ) {
1267                 rc = (long)connection_operation( ctx, cri.op );
1268         } else if ( cri.func ) {
1269                 rc = (long)cri.func( ctx, cri.arg );
1270         }
1271
1272         return (void*)(long)rc;
1273 }
1274
1275 int connection_read_activate( ber_socket_t s )
1276 {
1277         int rc;
1278
1279         /*
1280          * suspend reading on this file descriptor until a connection processing
1281          * thread reads data on it. Otherwise the listener thread will repeatedly
1282          * submit the same event on it to the pool.
1283          */
1284         rc = slapd_clr_read( s, 0 );
1285         if ( rc )
1286                 return rc;
1287
1288         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1289                 connection_read_thread, (void *)(long)s );
1290
1291         if( rc != 0 ) {
1292                 Debug( LDAP_DEBUG_ANY,
1293                         "connection_read_activate(%d): submit failed (%d)\n",
1294                         s, rc, 0 );
1295         }
1296
1297         return rc;
1298 }
1299 #endif
1300
1301 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1302 static int
1303 connection_read( ber_socket_t s, conn_readinfo *cri )
1304 #else
1305 int connection_read(ber_socket_t s)
1306 #endif
1307 {
1308         int rc = 0;
1309         Connection *c;
1310
1311         assert( connections != NULL );
1312
1313         /* get (locked) connection */
1314         c = connection_get( s );
1315
1316         if( c == NULL ) {
1317                 Debug( LDAP_DEBUG_ANY,
1318                         "connection_read(%ld): no connection!\n",
1319                         (long) s, 0, 0 );
1320
1321                 return -1;
1322         }
1323
1324         c->c_n_read++;
1325
1326         if( c->c_conn_state == SLAP_C_CLOSING ) {
1327                 Debug( LDAP_DEBUG_TRACE,
1328                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1329                         s, c->c_connid, 0 );
1330                 connection_return( c );
1331                 return 0;
1332         }
1333
1334         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1335 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1336                 cri->func = c->c_clientfunc;
1337                 cri->arg = c->c_clientarg;
1338                 /* read should already be cleared */
1339 #else
1340                 slapd_clr_read( s, 0 );
1341                 ldap_pvt_thread_pool_submit( &connection_pool,
1342                         c->c_clientfunc, c->c_clientarg );
1343 #endif
1344                 connection_return( c );
1345                 return 0;
1346         }
1347
1348         Debug( LDAP_DEBUG_TRACE,
1349                 "connection_read(%d): checking for input on id=%lu\n",
1350                 s, c->c_connid, 0 );
1351
1352 #ifdef HAVE_TLS
1353         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1354                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1355                 if ( rc < 0 ) {
1356                         Debug( LDAP_DEBUG_TRACE,
1357                                 "connection_read(%d): TLS accept failure "
1358                                 "error=%d id=%lu, closing\n",
1359                                 s, rc, c->c_connid );
1360
1361                         c->c_needs_tls_accept = 0;
1362                         /* c_mutex is locked */
1363                         connection_closing( c, "TLS negotiation failure" );
1364                         connection_close( c );
1365                         connection_return( c );
1366                         return 0;
1367
1368                 } else if ( rc == 0 ) {
1369                         void *ssl;
1370                         struct berval authid = BER_BVNULL;
1371
1372                         c->c_needs_tls_accept = 0;
1373
1374                         /* we need to let SASL know */
1375                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1376
1377                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1378                         if( c->c_tls_ssf > c->c_ssf ) {
1379                                 c->c_ssf = c->c_tls_ssf;
1380                         }
1381
1382                         rc = dnX509peerNormalize( ssl, &authid );
1383                         if ( rc != LDAP_SUCCESS ) {
1384                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1385                                         "unable to get TLS client DN, error=%d id=%lu\n",
1386                                         s, rc, c->c_connid );
1387                         }
1388                         Statslog( LDAP_DEBUG_STATS,
1389                                 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1390                             c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1391                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1392                         if ( authid.bv_val ) free( authid.bv_val );
1393                 }
1394
1395                 /* if success and data is ready, fall thru to data input loop */
1396                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1397                 {
1398 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1399                         slapd_set_read( s, 1 );
1400 #endif
1401
1402                         connection_return( c );
1403                         return 0;
1404                 }
1405         }
1406 #endif
1407
1408 #ifdef HAVE_CYRUS_SASL
1409         if ( c->c_sasl_layers ) {
1410                 /* If previous layer is not removed yet, give up for now */
1411                 if ( !c->c_sasl_sockctx ) {
1412 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1413                         slapd_set_read( s, 1 );
1414 #endif
1415
1416                         connection_return( c );
1417                         return 0;
1418                 }
1419
1420                 c->c_sasl_layers = 0;
1421
1422                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1423                 if( rc != LDAP_SUCCESS ) {
1424                         Debug( LDAP_DEBUG_TRACE,
1425                                 "connection_read(%d): SASL install error "
1426                                 "error=%d id=%lu, closing\n",
1427                                 s, rc, c->c_connid );
1428
1429                         /* c_mutex is locked */
1430                         connection_closing( c, "SASL layer install failure" );
1431                         connection_close( c );
1432                         connection_return( c );
1433                         return 0;
1434                 }
1435         }
1436 #endif
1437
1438 #define CONNECTION_INPUT_LOOP 1
1439 /* #define      DATA_READY_LOOP 1 */
1440
1441         do {
1442                 /* How do we do this without getting into a busy loop ? */
1443 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1444                 rc = connection_input( c, cri );
1445 #else
1446                 rc = connection_input( c );
1447 #endif
1448         }
1449 #ifdef DATA_READY_LOOP
1450         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1451 #elif CONNECTION_INPUT_LOOP
1452         while(!rc);
1453 #else
1454         while(0);
1455 #endif
1456
1457         if( rc < 0 ) {
1458                 Debug( LDAP_DEBUG_CONNS,
1459                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1460                         s, rc, c->c_connid );
1461
1462                 /* c_mutex is locked */
1463                 connection_closing( c, conn_lost_str );
1464                 connection_close( c );
1465                 connection_return( c );
1466                 return 0;
1467         }
1468
1469 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1470         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1471                 slapd_set_write( s, 0 );
1472         }
1473
1474         slapd_set_read( s, 1 );
1475 #else
1476         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1477                 slapd_set_read( s, 1 );
1478         }
1479
1480         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1481                 slapd_set_write( s, 1 );
1482         }
1483 #endif
1484
1485         connection_return( c );
1486
1487         return 0;
1488 }
1489
1490 static int
1491 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1492 connection_input( Connection *conn , conn_readinfo *cri )
1493 #else
1494 connection_input( Connection *conn )
1495 #endif
1496 {
1497         Operation *op;
1498         ber_tag_t       tag;
1499         ber_len_t       len;
1500         ber_int_t       msgid;
1501         BerElement      *ber;
1502         int             rc;
1503 #ifdef LDAP_CONNECTIONLESS
1504         Sockaddr        peeraddr;
1505         char            *cdn = NULL;
1506 #endif
1507         char *defer = NULL;
1508
1509         if ( conn->c_currentber == NULL &&
1510                 ( conn->c_currentber = ber_alloc()) == NULL )
1511         {
1512                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1513                 return -1;
1514         }
1515
1516         errno = 0;
1517
1518 #ifdef LDAP_CONNECTIONLESS
1519         if ( conn->c_is_udp ) {
1520                 char peername[sizeof("IP=255.255.255.255:65336")];
1521
1522                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1523                 if (len != sizeof(struct sockaddr)) return 1;
1524
1525                 sprintf( peername, "IP=%s:%d",
1526                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1527                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1528                 Statslog( LDAP_DEBUG_STATS,
1529                         "conn=%lu UDP request from %s (%s) accepted.\n",
1530                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1531         }
1532 #endif
1533
1534         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1535         if ( tag != LDAP_TAG_MESSAGE ) {
1536                 int err = errno;
1537                 ber_socket_t    sd;
1538
1539                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1540
1541                 Debug( LDAP_DEBUG_TRACE,
1542                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1543                         sd, err, sock_errstr(err) );
1544                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1545                         /* log, close and send error */
1546                         ber_free( conn->c_currentber, 1 );
1547                         conn->c_currentber = NULL;
1548
1549                         return -2;
1550                 }
1551                 return 1;
1552         }
1553
1554         ber = conn->c_currentber;
1555         conn->c_currentber = NULL;
1556
1557         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1558                 /* log, close and send error */
1559                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1560                 ber_free( ber, 1 );
1561                 return -1;
1562         }
1563
1564         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1565                 /* log, close and send error */
1566                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1567                 ber_free( ber, 1 );
1568
1569                 return -1;
1570         }
1571
1572 #ifdef LDAP_CONNECTIONLESS
1573         if( conn->c_is_udp ) {
1574                 if( tag == LBER_OCTETSTRING ) {
1575                         ber_get_stringa( ber, &cdn );
1576                         tag = ber_peek_tag(ber, &len);
1577                 }
1578                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1579                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1580                         ber_free( ber, 1 );
1581                         return 0;
1582                 }
1583         }
1584 #endif
1585
1586         if(tag == LDAP_REQ_BIND) {
1587                 /* immediately abandon all existing operations upon BIND */
1588                 connection_abandon( conn );
1589         }
1590
1591         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1592
1593         op->o_conn = conn;
1594         /* clear state if the connection is being reused from inactive */
1595         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1596                 memset( &conn->c_pagedresults_state, 0,
1597                         sizeof( conn->c_pagedresults_state ) );
1598         }
1599
1600         op->o_res_ber = NULL;
1601
1602 #ifdef LDAP_CONNECTIONLESS
1603         if (conn->c_is_udp) {
1604                 if ( cdn ) {
1605                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1606                         op->o_protocol = LDAP_VERSION2;
1607                 }
1608                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1609                 if (op->o_res_ber == NULL) return 1;
1610
1611                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1612                         sizeof(struct sockaddr), 0 );
1613
1614                 if (rc != sizeof(struct sockaddr)) {
1615                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1616                         return 1;
1617                 }
1618
1619                 if (op->o_protocol == LDAP_VERSION2) {
1620                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1621                         if (rc == -1) {
1622                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
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         switch( tag ){
1639         default:
1640                 /* Abandon and Unbind are exempt from these checks */
1641                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1642                         defer = "closing";
1643                         break;
1644                 } else if (conn->c_writewaiter) {
1645                         defer = "awaiting write";
1646                         break;
1647                 } else if (conn->c_n_ops_pending) {
1648                         defer = "pending operations";
1649                         break;
1650                 }
1651                 /* FALLTHRU */
1652         case LDAP_REQ_ABANDON:
1653                 /* Unbind is exempt from these checks */
1654                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1655                         defer = "too many executing";
1656                         break;
1657                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1658                         defer = "binding";
1659                         break;
1660                 }
1661                 /* FALLTHRU */
1662         case LDAP_REQ_UNBIND:
1663                 break;
1664         }
1665
1666         if( defer ) {
1667                 int max = conn->c_dn.bv_len
1668                         ? slap_conn_max_pending_auth
1669                         : slap_conn_max_pending;
1670
1671                 Debug( LDAP_DEBUG_ANY,
1672                         "connection_input: conn=%lu deferring operation: %s\n",
1673                         conn->c_connid, defer, 0 );
1674                 conn->c_n_ops_pending++;
1675                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1676                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1677
1678         } else {
1679                 conn->c_n_ops_executing++;
1680
1681 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1682                 /*
1683                  * The first op will be processed in the same thread context,
1684                  * as long as there is only one op total.
1685                  * Subsequent ops will be submitted to the pool by
1686                  * calling connection_op_activate()
1687                  */
1688                 if ( cri->op == NULL ) {
1689                         /* the first incoming request */
1690                         connection_op_queue( op );
1691                         cri->op = op;
1692                 } else {
1693                         if ( !cri->nullop ) {
1694                                 cri->nullop = 1;
1695                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1696                                         connection_operation, (void *) cri->op );
1697                         }
1698                         connection_op_activate( op );
1699                 }
1700 #else
1701                 connection_op_activate( op );
1702 #endif
1703         }
1704
1705 #ifdef NO_THREADS
1706         if ( conn->c_struct_state != SLAP_C_USED ) {
1707                 /* connection must have got closed underneath us */
1708                 return 1;
1709         }
1710 #endif
1711
1712         assert( conn->c_struct_state == SLAP_C_USED );
1713         return rc;
1714 }
1715
1716 static int
1717 connection_resched( Connection *conn )
1718 {
1719         Operation *op;
1720
1721         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1722                 ber_socket_t    sd;
1723                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1724
1725                 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1726                         "attempting closing conn=%lu sd=%d\n",
1727                         conn->c_connid, sd, 0 );
1728                 connection_close( conn );
1729                 return 0;
1730         }
1731
1732         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1733                 /* other states need different handling */
1734                 return 0;
1735         }
1736
1737         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1738                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1739
1740                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1741                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1742
1743                 /* pending operations should not be marked for abandonment */
1744                 assert(!op->o_abandon);
1745
1746                 conn->c_n_ops_pending--;
1747                 conn->c_n_ops_executing++;
1748
1749                 connection_op_activate( op );
1750
1751                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1752         }
1753         return 0;
1754 }
1755
1756 static void
1757 connection_init_log_prefix( Operation *op )
1758 {
1759         if ( op->o_connid == (unsigned long)(-1) ) {
1760                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1761                         "conn=-1 op=%lu", op->o_opid );
1762
1763         } else {
1764                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1765                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1766         }
1767 }
1768
1769 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1770 {
1771         op->o_conn->c_sasl_bindop = NULL;
1772
1773         return SLAP_CB_CONTINUE;
1774 }
1775
1776 static int connection_bind_cb( Operation *op, SlapReply *rs )
1777 {
1778         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1779         op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1780         op->o_conn->c_sasl_bind_in_progress =
1781                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1782
1783         /* Moved here from bind.c due to ITS#4158 */
1784         op->o_conn->c_sasl_bindop = NULL;
1785         if ( op->orb_method == LDAP_AUTH_SASL ) {
1786                 if( rs->sr_err == LDAP_SUCCESS ) {
1787                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1788                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1789                                 /* edn is always normalized already */
1790                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1791                         }
1792                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1793                         BER_BVZERO( &op->orb_edn );
1794                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1795                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1796
1797                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1798                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1799                                 op->o_conn->c_ssf = op->orb_ssf;
1800                         }
1801
1802                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1803                                 ber_len_t max = sockbuf_max_incoming_auth;
1804                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1805                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1806                         }
1807
1808                         /* log authorization identity */
1809                         Statslog( LDAP_DEBUG_STATS,
1810                                 "%s BIND dn=\"%s\" mech=%s ssf=%d\n",
1811                                 op->o_log_prefix,
1812                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1813                                 op->o_conn->c_authmech.bv_val, op->orb_ssf, 0 );
1814
1815                         Debug( LDAP_DEBUG_TRACE,
1816                                 "do_bind: SASL/%s bind: dn=\"%s\" ssf=%d\n",
1817                                 op->o_conn->c_authmech.bv_val,
1818                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1819                                 op->orb_ssf );
1820
1821                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1822                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1823                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1824                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1825                         }
1826                 }
1827         }
1828         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1829
1830         ch_free( op->o_callback );
1831         op->o_callback = NULL;
1832
1833         return SLAP_CB_CONTINUE;
1834 }
1835
1836 static void connection_op_queue( Operation *op )
1837 {
1838         ber_tag_t tag = op->o_tag;
1839
1840         if (tag == LDAP_REQ_BIND) {
1841                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1842                 sc->sc_response = connection_bind_cb;
1843                 sc->sc_cleanup = connection_bind_cleanup_cb;
1844                 sc->sc_next = op->o_callback;
1845                 op->o_callback = sc;
1846                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1847         }
1848
1849         if (!op->o_dn.bv_len) {
1850                 op->o_authz = op->o_conn->c_authz;
1851                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1852                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1853                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1854                 } else {
1855                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1856                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1857                 }
1858         }
1859
1860         op->o_authtype = op->o_conn->c_authtype;
1861         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1862
1863         if (!op->o_protocol) {
1864                 op->o_protocol = op->o_conn->c_protocol
1865                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1866         }
1867
1868         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1869                 op->o_protocol > LDAP_VERSION2)
1870         {
1871                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1872         }
1873
1874         op->o_connid = op->o_conn->c_connid;
1875         connection_init_log_prefix( op );
1876
1877         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1878 }
1879
1880 static int connection_op_activate( Operation *op )
1881 {
1882         int rc;
1883
1884         connection_op_queue( op );
1885
1886         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1887                 connection_operation, (void *) op );
1888
1889         if ( rc != 0 ) {
1890                 Debug( LDAP_DEBUG_ANY,
1891                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1892                         rc, op->o_connid, 0 );
1893                 /* should move op to pending list */
1894         }
1895
1896         return rc;
1897 }
1898
1899 int connection_write(ber_socket_t s)
1900 {
1901         Connection *c;
1902         Operation *op;
1903
1904         assert( connections != NULL );
1905
1906         slapd_clr_write( s, 0 );
1907
1908         c = connection_get( s );
1909         if( c == NULL ) {
1910                 Debug( LDAP_DEBUG_ANY,
1911                         "connection_write(%ld): no connection!\n",
1912                         (long)s, 0, 0 );
1913                 return -1;
1914         }
1915
1916         c->c_n_write++;
1917
1918         Debug( LDAP_DEBUG_TRACE,
1919                 "connection_write(%d): waking output for id=%lu\n",
1920                 s, c->c_connid, 0 );
1921         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1922
1923         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1924                 slapd_set_read( s, 1 );
1925         }
1926         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1927                 slapd_set_write( s, 1 );
1928         }
1929
1930         /* If there are ops pending because of a writewaiter,
1931          * start one up.
1932          */
1933         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1934                 if ( !c->c_writewaiter ) break;
1935                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1936
1937                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1938                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1939
1940                 /* pending operations should not be marked for abandonment */
1941                 assert(!op->o_abandon);
1942
1943                 c->c_n_ops_pending--;
1944                 c->c_n_ops_executing++;
1945
1946                 connection_op_activate( op );
1947
1948                 break;
1949         }
1950
1951         connection_return( c );
1952         return 0;
1953 }
1954
1955 void
1956 connection_fake_init(
1957         Connection *conn,
1958         Operation *op,
1959         void *ctx )
1960 {
1961         conn->c_connid = -1;
1962         conn->c_send_ldap_result = slap_send_ldap_result;
1963         conn->c_send_search_entry = slap_send_search_entry;
1964         conn->c_send_search_reference = slap_send_search_reference;
1965         conn->c_listener = (Listener *)&dummy_list;
1966         conn->c_peer_domain = slap_empty_bv;
1967         conn->c_peer_name = slap_empty_bv;
1968
1969         memset(op, 0, OPERATION_BUFFER_SIZE);
1970         op->o_hdr = (Opheader *)(op+1);
1971         op->o_controls = (void **)(op->o_hdr+1);
1972         /* set memory context */
1973         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx);
1974         op->o_tmpmfuncs = &slap_sl_mfuncs;
1975         op->o_threadctx = ctx;
1976         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1977
1978         op->o_conn = conn;
1979         op->o_connid = op->o_conn->c_connid;
1980         connection_init_log_prefix( op );
1981
1982 #ifdef LDAP_SLAPI
1983         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
1984         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
1985 #endif /* LDAP_SLAPI */
1986
1987         slap_op_time( &op->o_time, &op->o_tincr );
1988 }
1989
1990 void
1991 connection_assign_nextid( Connection *conn )
1992 {
1993         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
1994         conn->c_connid = conn_nextid++;
1995         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
1996 }