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 1998-2009 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 = SLAPD_SYNC_SYNCCONN_OFFSET;
  52
  53 static const char conn_lost_str[] = "connection lost";
  54
  55 const char *
  56 connection_state2str( int state )
  57 {
  58         switch( state ) {
  59         case SLAP_C_INVALID:    return "!";
  60         case SLAP_C_INACTIVE:   return "|";
  61         case SLAP_C_CLOSING:    return "C";
  62         case SLAP_C_ACTIVE:             return "";
  63         case SLAP_C_BINDING:    return "B";
  64         case SLAP_C_CLIENT:             return "L";
  65         }
  66
  67         return "?";
  68 }
  69
  70 static Connection* connection_get( ber_socket_t s );
  71
  72 typedef struct conn_readinfo {
  73         Operation *op;
  74         ldap_pvt_thread_start_t *func;
  75         void *arg;
  76         void *ctx;
  77         int nullop;
  78 } conn_readinfo;
  79
  80 static int connection_input( Connection *c, conn_readinfo *cri );
  81 static void connection_close( Connection *c );
  82
  83 static int connection_op_activate( Operation *op );
  84 static void connection_op_queue( Operation *op );
  85 static int connection_resched( Connection *conn );
  86 static void connection_abandon( Connection *conn );
  87 static void connection_destroy( Connection *c );
  88
  89 static ldap_pvt_thread_start_t connection_operation;
  90
  91 /*
  92  * Initialize connection management infrastructure.
  93  */
  94 int connections_init(void)
  95 {
  96         int i;
  97
  98         assert( connections == NULL );
  99
 100         if( connections != NULL) {
 101                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 102                         0, 0, 0 );
 103                 return -1;
 104         }
 105
 106         /* should check return of every call */
 107         ldap_pvt_thread_mutex_init( &connections_mutex );
 108         ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 109
 110         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 111
 112         if( connections == NULL ) {
 113                 Debug( LDAP_DEBUG_ANY, "connections_init: "
 114                         "allocation (%d*%ld) of connection array failed\n",
 115                         dtblsize, (long) sizeof(Connection), 0 );
 116                 return -1;
 117         }
 118
 119         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 120         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 121
 122         for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 123
 124         /*
 125          * per entry initialization of the Connection array initialization
 126          * will be done by connection_init()
 127          */
 128
 129         return 0;
 130 }
 131
 132 /*
 133  * Destroy connection management infrastructure.
 134  */
 135
 136 int connections_destroy(void)
 137 {
 138         ber_socket_t i;
 139
 140         /* should check return of every call */
 141
 142         if( connections == NULL) {
 143                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 144                         0, 0, 0 );
 145                 return -1;
 146         }
 147
 148         for ( i = 0; i < dtblsize; i++ ) {
 149                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 150                         ber_sockbuf_free( connections[i].c_sb );
 151                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 152                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
 153                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
 154                         ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
 155                         ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
 156 #ifdef LDAP_SLAPI
 157                         if ( slapi_plugins_used ) {
 158                                 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
 159                                         &connections[i] );
 160                         }
 161 #endif
 162                 }
 163         }
 164
 165         free( connections );
 166         connections = NULL;
 167
 168         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 169         ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
 170         return 0;
 171 }
 172
 173 /*
 174  * shutdown all connections
 175  */
 176 int connections_shutdown(void)
 177 {
 178         ber_socket_t i;
 179
 180         for ( i = 0; i < dtblsize; i++ ) {
 181                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 182                         ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 183                         if( connections[i].c_struct_state == SLAP_C_USED ) {
 184
 185                                 /* give persistent clients a chance to cleanup */
 186                                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 187                                         ldap_pvt_thread_pool_submit( &connection_pool,
 188                                         connections[i].c_clientfunc, connections[i].c_clientarg );
 189                                 } else {
 190                                         /* c_mutex is locked */
 191                                         connection_closing( &connections[i], "slapd shutdown" );
 192                                         connection_close( &connections[i] );
 193                                 }
 194                         }
 195                         ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 196                 }
 197         }
 198
 199         return 0;
 200 }
 201
 202 /*
 203  * Timeout idle connections.
 204  */
 205 int connections_timeout_idle(time_t now)
 206 {
 207         int i = 0, writers = 0;
 208         int connindex;
 209         Connection* c;
 210         time_t old;
 211
 212         old = slapd_get_writetime();
 213
 214         for( c = connection_first( &connindex );
 215                 c != NULL;
 216                 c = connection_next( c, &connindex ) )
 217         {
 218                 /* Don't timeout a slow-running request or a persistent
 219                  * outbound connection. But if it has a writewaiter, see
 220                  * if the waiter has been there too long.
 221                  */
 222                 if(( c->c_n_ops_executing && !c->c_writewaiter)
 223                         || c->c_conn_state == SLAP_C_CLIENT ) {
 224                         continue;
 225                 }
 226
 227                 if( global_idletimeout &&
 228                         difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 229                         /* close it */
 230                         connection_closing( c, "idletimeout" );
 231                         connection_close( c );
 232                         i++;
 233                         continue;
 234                 }
 235                 if ( c->c_writewaiter && global_writetimeout ) {
 236                         writers = 1;
 237                         if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
 238                                 /* close it */
 239                                 connection_closing( c, "writetimeout" );
 240                                 connection_close( c );
 241                                 i++;
 242                         }
 243                 }
 244         }
 245         connection_done( c );
 246         if ( old && !writers )
 247                 slapd_clr_writetime( old );
 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         assert( s < dtblsize );
 265         c = &connections[s];
 266
 267         if( c != NULL ) {
 268                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 269
 270                 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 271
 272                 if( c->c_struct_state != SLAP_C_USED ) {
 273                         /* connection must have been closed due to resched */
 274
 275                         assert( c->c_conn_state == SLAP_C_INVALID );
 276                         assert( c->c_sd == AC_SOCKET_INVALID );
 277
 278                         Debug( LDAP_DEBUG_CONNS,
 279                                 "connection_get(%d): connection not used\n",
 280                                 s, 0, 0 );
 281
 282                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 283                         return NULL;
 284                 }
 285
 286                 Debug( LDAP_DEBUG_TRACE,
 287                         "connection_get(%d): got connid=%lu\n",
 288                         s, c->c_connid, 0 );
 289
 290                 c->c_n_get++;
 291
 292                 assert( c->c_struct_state == SLAP_C_USED );
 293                 assert( c->c_conn_state != SLAP_C_INVALID );
 294                 assert( c->c_sd != AC_SOCKET_INVALID );
 295
 296 #ifndef SLAPD_MONITOR
 297                 if ( global_idletimeout > 0 )
 298 #endif /* ! SLAPD_MONITOR */
 299                 {
 300                         c->c_activitytime = slap_get_time();
 301                 }
 302         }
 303
 304         return c;
 305 }
 306
 307 static void connection_return( Connection *c )
 308 {
 309         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 310 }
 311
 312 Connection * connection_init(
 313         ber_socket_t s,
 314         Listener *listener,
 315         const char* dnsname,
 316         const char* peername,
 317         int flags,
 318         slap_ssf_t ssf,
 319         struct berval *authid
 320         LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
 321 {
 322         unsigned long id;
 323         Connection *c;
 324         int doinit = 0;
 325         ber_socket_t sfd = SLAP_FD2SOCK(s);
 326
 327         assert( connections != NULL );
 328
 329         assert( listener != NULL );
 330         assert( dnsname != NULL );
 331         assert( peername != NULL );
 332
 333 #ifndef HAVE_TLS
 334         assert( !( flags & CONN_IS_TLS ));
 335 #endif
 336
 337         if( s == AC_SOCKET_INVALID ) {
 338                 Debug( LDAP_DEBUG_ANY,
 339                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 340                 return NULL;
 341         }
 342
 343         assert( s >= 0 );
 344         assert( s < dtblsize );
 345         c = &connections[s];
 346         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 347                 doinit = 1;
 348         } else {
 349                 assert( c->c_struct_state == SLAP_C_UNUSED );
 350         }
 351
 352         if( doinit ) {
 353                 c->c_send_ldap_result = slap_send_ldap_result;
 354                 c->c_send_search_entry = slap_send_search_entry;
 355                 c->c_send_search_reference = slap_send_search_reference;
 356                 c->c_send_ldap_extended = slap_send_ldap_extended;
 357                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 358
 359                 BER_BVZERO( &c->c_authmech );
 360                 BER_BVZERO( &c->c_dn );
 361                 BER_BVZERO( &c->c_ndn );
 362
 363                 c->c_listener = NULL;
 364                 BER_BVZERO( &c->c_peer_domain );
 365                 BER_BVZERO( &c->c_peer_name );
 366
 367                 LDAP_STAILQ_INIT(&c->c_ops);
 368                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 369
 370 #ifdef LDAP_X_TXN
 371                 c->c_txn = CONN_TXN_INACTIVE;
 372                 c->c_txn_backend = NULL;
 373                 LDAP_STAILQ_INIT(&c->c_txn_ops);
 374 #endif
 375
 376                 BER_BVZERO( &c->c_sasl_bind_mech );
 377                 c->c_sasl_done = 0;
 378                 c->c_sasl_authctx = NULL;
 379                 c->c_sasl_sockctx = NULL;
 380                 c->c_sasl_extra = NULL;
 381                 c->c_sasl_bindop = NULL;
 382
 383                 c->c_sb = ber_sockbuf_alloc( );
 384
 385                 {
 386                         ber_len_t max = sockbuf_max_incoming;
 387                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 388                 }
 389
 390                 c->c_currentber = NULL;
 391
 392                 /* should check status of thread calls */
 393                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 394                 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
 395                 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
 396                 ldap_pvt_thread_cond_init( &c->c_write1_cv );
 397                 ldap_pvt_thread_cond_init( &c->c_write2_cv );
 398
 399 #ifdef LDAP_SLAPI
 400                 if ( slapi_plugins_used ) {
 401                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 402                 }
 403 #endif
 404         }
 405
 406         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 407
 408         assert( BER_BVISNULL( &c->c_authmech ) );
 409         assert( BER_BVISNULL( &c->c_dn ) );
 410         assert( BER_BVISNULL( &c->c_ndn ) );
 411         assert( c->c_listener == NULL );
 412         assert( BER_BVISNULL( &c->c_peer_domain ) );
 413         assert( BER_BVISNULL( &c->c_peer_name ) );
 414         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 415         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 416 #ifdef LDAP_X_TXN
 417         assert( c->c_txn == CONN_TXN_INACTIVE );
 418         assert( c->c_txn_backend == NULL );
 419         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 420 #endif
 421         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 422         assert( c->c_sasl_done == 0 );
 423         assert( c->c_sasl_authctx == NULL );
 424         assert( c->c_sasl_sockctx == NULL );
 425         assert( c->c_sasl_extra == NULL );
 426         assert( c->c_sasl_bindop == NULL );
 427         assert( c->c_currentber == NULL );
 428         assert( c->c_writewaiter == 0);
 429         assert( c->c_writers == 0);
 430
 431         c->c_listener = listener;
 432         c->c_sd = s;
 433
 434         if ( flags & CONN_IS_CLIENT ) {
 435                 c->c_connid = 0;
 436                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 437                 c->c_conn_state = SLAP_C_CLIENT;
 438                 c->c_struct_state = SLAP_C_USED;
 439                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 440                 c->c_close_reason = "?";                        /* should never be needed */
 441                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
 442                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 443
 444                 return c;
 445         }
 446
 447         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 448         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 449
 450         c->c_n_ops_received = 0;
 451         c->c_n_ops_executing = 0;
 452         c->c_n_ops_pending = 0;
 453         c->c_n_ops_completed = 0;
 454
 455         c->c_n_get = 0;
 456         c->c_n_read = 0;
 457         c->c_n_write = 0;
 458
 459         /* set to zero until bind, implies LDAP_VERSION3 */
 460         c->c_protocol = 0;
 461
 462 #ifndef SLAPD_MONITOR
 463         if ( global_idletimeout > 0 )
 464 #endif /* ! SLAPD_MONITOR */
 465         {
 466                 c->c_activitytime = c->c_starttime = slap_get_time();
 467         }
 468
 469 #ifdef LDAP_CONNECTIONLESS
 470         c->c_is_udp = 0;
 471         if( flags & CONN_IS_UDP ) {
 472                 c->c_is_udp = 1;
 473 #ifdef LDAP_DEBUG
 474                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 475                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 476 #endif
 477                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 478                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 479                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 480                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 481         } else
 482 #endif /* LDAP_CONNECTIONLESS */
 483 #ifdef LDAP_PF_LOCAL
 484         if ( flags & CONN_IS_IPC ) {
 485 #ifdef LDAP_DEBUG
 486                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 487                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 488 #endif
 489                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
 490                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 491 #ifdef LDAP_PF_LOCAL_SENDMSG
 492                 if ( !BER_BVISEMPTY( peerbv ))
 493                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
 494 #endif
 495         } else
 496 #endif /* LDAP_PF_LOCAL */
 497         {
 498 #ifdef LDAP_DEBUG
 499                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 500                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 501 #endif
 502                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 503                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 504         }
 505
 506 #ifdef LDAP_DEBUG
 507         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 508                 INT_MAX, (void*)"ldap_" );
 509 #endif
 510
 511         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 512                 c /* non-NULL */ ) < 0 )
 513         {
 514                 Debug( LDAP_DEBUG_ANY,
 515                         "connection_init(%d, %s): set nonblocking failed\n",
 516                         s, c->c_peer_name.bv_val, 0 );
 517         }
 518
 519         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 520         id = c->c_connid = conn_nextid++;
 521         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 522
 523         ldap_pvt_thread_mutex_lock( &connections_mutex );
 524         c->c_conn_state = SLAP_C_INACTIVE;
 525         c->c_struct_state = SLAP_C_USED;
 526         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 527         c->c_close_reason = "?";                        /* should never be needed */
 528
 529         c->c_ssf = c->c_transport_ssf = ssf;
 530         c->c_tls_ssf = 0;
 531
 532 #ifdef HAVE_TLS
 533         if ( flags & CONN_IS_TLS ) {
 534                 c->c_is_tls = 1;
 535                 c->c_needs_tls_accept = 1;
 536         } else {
 537                 c->c_is_tls = 0;
 538                 c->c_needs_tls_accept = 0;
 539         }
 540 #endif
 541
 542         slap_sasl_open( c, 0 );
 543         slap_sasl_external( c, ssf, authid );
 544
 545         slapd_add_internal( s, 1 );
 546         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 547
 548         backend_connection_init(c);
 549
 550         return c;
 551 }
 552
 553 void connection2anonymous( Connection *c )
 554 {
 555         assert( connections != NULL );
 556         assert( c != NULL );
 557
 558         {
 559                 ber_len_t max = sockbuf_max_incoming;
 560                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 561         }
 562
 563         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 564                 ch_free(c->c_authmech.bv_val);
 565         }
 566         BER_BVZERO( &c->c_authmech );
 567
 568         if ( !BER_BVISNULL( &c->c_dn ) ) {
 569                 ch_free(c->c_dn.bv_val);
 570         }
 571         BER_BVZERO( &c->c_dn );
 572
 573         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 574                 ch_free(c->c_ndn.bv_val);
 575         }
 576         BER_BVZERO( &c->c_ndn );
 577
 578         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 579                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 580         }
 581         BER_BVZERO( &c->c_sasl_authz_dn );
 582
 583         c->c_authz_backend = NULL;
 584 }
 585
 586 static void
 587 connection_destroy( Connection *c )
 588 {
 589         unsigned long   connid;
 590         const char              *close_reason;
 591         Sockbuf                 *sb;
 592         ber_socket_t    sd;
 593
 594         assert( connections != NULL );
 595         assert( c != NULL );
 596         assert( c->c_struct_state != SLAP_C_UNUSED );
 597         assert( c->c_conn_state != SLAP_C_INVALID );
 598         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 599         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 600 #ifdef LDAP_X_TXN
 601         assert( c->c_txn == CONN_TXN_INACTIVE );
 602         assert( c->c_txn_backend == NULL );
 603         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 604 #endif
 605         assert( c->c_writewaiter == 0);
 606         assert( c->c_writers == 0);
 607
 608         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 609         connid = c->c_connid;
 610         close_reason = c->c_close_reason;
 611
 612         ldap_pvt_thread_mutex_lock( &connections_mutex );
 613         c->c_struct_state = SLAP_C_PENDING;
 614         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 615
 616         backend_connection_destroy(c);
 617
 618         c->c_protocol = 0;
 619         c->c_connid = -1;
 620
 621         c->c_activitytime = c->c_starttime = 0;
 622
 623         connection2anonymous( c );
 624         c->c_listener = NULL;
 625
 626         if(c->c_peer_domain.bv_val != NULL) {
 627                 free(c->c_peer_domain.bv_val);
 628         }
 629         BER_BVZERO( &c->c_peer_domain );
 630         if(c->c_peer_name.bv_val != NULL) {
 631                 free(c->c_peer_name.bv_val);
 632         }
 633         BER_BVZERO( &c->c_peer_name );
 634
 635         c->c_sasl_bind_in_progress = 0;
 636         if(c->c_sasl_bind_mech.bv_val != NULL) {
 637                 free(c->c_sasl_bind_mech.bv_val);
 638         }
 639         BER_BVZERO( &c->c_sasl_bind_mech );
 640
 641         slap_sasl_close( c );
 642
 643         if ( c->c_currentber != NULL ) {
 644                 ber_free( c->c_currentber, 1 );
 645                 c->c_currentber = NULL;
 646         }
 647
 648
 649 #ifdef LDAP_SLAPI
 650         /* call destructors, then constructors; avoids unnecessary allocation */
 651         if ( slapi_plugins_used ) {
 652                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 653         }
 654 #endif
 655
 656         sd = c->c_sd;
 657         c->c_sd = AC_SOCKET_INVALID;
 658         c->c_conn_state = SLAP_C_INVALID;
 659         c->c_struct_state = SLAP_C_UNUSED;
 660         c->c_close_reason = "?";                        /* should never be needed */
 661
 662         sb = c->c_sb;
 663         c->c_sb = ber_sockbuf_alloc( );
 664         {
 665                 ber_len_t max = sockbuf_max_incoming;
 666                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 667         }
 668
 669         /* c must be fully reset by this point; when we call slapd_remove
 670          * it may get immediately reused by a new connection.
 671          */
 672         if ( sd != AC_SOCKET_INVALID ) {
 673                 slapd_remove( sd, sb, 1, 0, 0 );
 674
 675                 if ( close_reason == NULL ) {
 676                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
 677                                 connid, (long) sd, 0, 0, 0 );
 678                 } else {
 679                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
 680                                 connid, (long) sd, close_reason, 0, 0 );
 681                 }
 682         }
 683 }
 684
 685 int connection_valid( Connection *c )
 686 {
 687         /* c_mutex must be locked by caller */
 688
 689         assert( c != NULL );
 690
 691         return c->c_struct_state == SLAP_C_USED &&
 692                 c->c_conn_state >= SLAP_C_ACTIVE &&
 693                 c->c_conn_state <= SLAP_C_CLIENT;
 694 }
 695
 696 static void connection_abandon( Connection *c )
 697 {
 698         /* c_mutex must be locked by caller */
 699
 700         Operation *o, *next, op = {0};
 701         Opheader ohdr = {0};
 702         SlapReply rs = {0};
 703
 704         op.o_hdr = &ohdr;
 705         op.o_conn = c;
 706         op.o_connid = c->c_connid;
 707         op.o_tag = LDAP_REQ_ABANDON;
 708
 709         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 710                 next = LDAP_STAILQ_NEXT( o, o_next );
 711                 op.orn_msgid = o->o_msgid;
 712                 o->o_abandon = 1;
 713                 op.o_bd = frontendDB;
 714                 frontendDB->be_abandon( &op, &rs );
 715         }
 716
 717 #ifdef LDAP_X_TXN
 718         /* remove operations in pending transaction */
 719         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 720                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 721                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 722                 slap_op_free( o, NULL );
 723         }
 724
 725         /* clear transaction */
 726         c->c_txn_backend = NULL;
 727         c->c_txn = CONN_TXN_INACTIVE;
 728 #endif
 729
 730         /* remove pending operations */
 731         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 732                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 733                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 734                 slap_op_free( o, NULL );
 735         }
 736 }
 737
 738 static void
 739 connection_wake_writers( Connection *c )
 740 {
 741         /* wake write blocked operations */
 742         ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 743         if ( c->c_writers > 0 ) {
 744                 c->c_writers = -c->c_writers;
 745                 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
 746                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 747                 if ( c->c_writewaiter ) {
 748                         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
 749                         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
 750                         slapd_clr_write( c->c_sd, 1 );
 751                         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
 752                 }
 753                 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 754                 while ( c->c_writers ) {
 755                         ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
 756                 }
 757                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 758         } else {
 759                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 760                 slapd_clr_write( c->c_sd, 1 );
 761         }
 762 }
 763
 764 void connection_closing( Connection *c, const char *why )
 765 {
 766         assert( connections != NULL );
 767         assert( c != NULL );
 768
 769         if ( c->c_struct_state != SLAP_C_USED ) return;
 770
 771         assert( c->c_conn_state != SLAP_C_INVALID );
 772
 773         /* c_mutex must be locked by caller */
 774
 775         if( c->c_conn_state != SLAP_C_CLOSING ) {
 776                 Debug( LDAP_DEBUG_CONNS,
 777                         "connection_closing: readying conn=%lu sd=%d for close\n",
 778                         c->c_connid, c->c_sd, 0 );
 779                 /* update state to closing */
 780                 c->c_conn_state = SLAP_C_CLOSING;
 781                 c->c_close_reason = why;
 782
 783                 /* don't listen on this port anymore */
 784                 slapd_clr_read( c->c_sd, 0 );
 785
 786                 /* abandon active operations */
 787                 connection_abandon( c );
 788
 789                 /* wake write blocked operations */
 790                 connection_wake_writers( c );
 791
 792         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 793                 /* Client closed connection after doing Unbind. */
 794                 c->c_close_reason = NULL;
 795         }
 796 }
 797
 798 static void
 799 connection_close( Connection *c )
 800 {
 801         assert( connections != NULL );
 802         assert( c != NULL );
 803
 804         if ( c->c_struct_state != SLAP_C_USED ) return;
 805
 806         assert( c->c_conn_state == SLAP_C_CLOSING );
 807
 808         /* NOTE: c_mutex should be locked by caller */
 809
 810         if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
 811                 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
 812         {
 813                 Debug( LDAP_DEBUG_CONNS,
 814                         "connection_close: deferring conn=%lu sd=%d\n",
 815                         c->c_connid, c->c_sd, 0 );
 816                 return;
 817         }
 818
 819         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 820                 c->c_connid, c->c_sd, 0 );
 821
 822         connection_destroy( c );
 823 }
 824
 825 unsigned long connections_nextid(void)
 826 {
 827         unsigned long id;
 828         assert( connections != NULL );
 829
 830         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 831
 832         id = conn_nextid;
 833
 834         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 835
 836         return id;
 837 }
 838
 839 Connection* connection_first( ber_socket_t *index )
 840 {
 841         assert( connections != NULL );
 842         assert( index != NULL );
 843
 844         ldap_pvt_thread_mutex_lock( &connections_mutex );
 845         for( *index = 0; *index < dtblsize; (*index)++) {
 846                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 847                         break;
 848                 }
 849         }
 850         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 851
 852         return connection_next(NULL, index);
 853 }
 854
 855 Connection* connection_next( Connection *c, ber_socket_t *index )
 856 {
 857         assert( connections != NULL );
 858         assert( index != NULL );
 859         assert( *index <= dtblsize );
 860
 861         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 862
 863         c = NULL;
 864
 865         ldap_pvt_thread_mutex_lock( &connections_mutex );
 866         for(; *index < dtblsize; (*index)++) {
 867                 int c_struct;
 868                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 869                         /* FIXME: accessing c_conn_state without locking c_mutex */
 870                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 871                         continue;
 872                 }
 873
 874                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 875                         c = &connections[(*index)++];
 876                         if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 877                                 /* avoid deadlock */
 878                                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 879                                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 880                                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 881                                 if ( c->c_struct_state != SLAP_C_USED ) {
 882                                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 883                                         c = NULL;
 884                                         continue;
 885                                 }
 886                         }
 887                         assert( c->c_conn_state != SLAP_C_INVALID );
 888                         break;
 889                 }
 890
 891                 c_struct = connections[*index].c_struct_state;
 892                 if ( c_struct == SLAP_C_PENDING )
 893                         continue;
 894                 assert( c_struct == SLAP_C_UNUSED );
 895                 /* FIXME: accessing c_conn_state without locking c_mutex */
 896                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 897         }
 898
 899         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 900         return c;
 901 }
 902
 903 void connection_done( Connection *c )
 904 {
 905         assert( connections != NULL );
 906
 907         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 908 }
 909
 910 /*
 911  * connection_activity - handle the request operation op on connection
 912  * conn.  This routine figures out what kind of operation it is and
 913  * calls the appropriate stub to handle it.
 914  */
 915
 916 #ifdef SLAPD_MONITOR
 917 /* FIXME: returns 0 in case of failure */
 918 #define INCR_OP_INITIATED(index) \
 919         do { \
 920                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 921                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
 922                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 923         } while (0)
 924 #define INCR_OP_COMPLETED(index) \
 925         do { \
 926                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 927                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 928                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
 929                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 930         } while (0)
 931 #else /* !SLAPD_MONITOR */
 932 #define INCR_OP_INITIATED(index) do { } while (0)
 933 #define INCR_OP_COMPLETED(index) \
 934         do { \
 935                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 936                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 937                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 938         } while (0)
 939 #endif /* !SLAPD_MONITOR */
 940
 941 /*
 942  * NOTE: keep in sync with enum in slapd.h
 943  */
 944 static BI_op_func *opfun[] = {
 945         do_bind,
 946         do_unbind,
 947         do_search,
 948         do_compare,
 949         do_modify,
 950         do_modrdn,
 951         do_add,
 952         do_delete,
 953         do_abandon,
 954         do_extended,
 955         NULL
 956 };
 957
 958 /* Counters are per-thread, not per-connection.
 959  */
 960 static void
 961 conn_counter_destroy( void *key, void *data )
 962 {
 963         slap_counters_t **prev, *sc;
 964
 965         ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
 966         for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
 967                 prev = &sc->sc_next, sc = sc->sc_next ) {
 968                 if ( sc == data ) {
 969                         int i;
 970
 971                         *prev = sc->sc_next;
 972                         /* Copy data to main counter */
 973                         ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
 974                         ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
 975                         ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
 976                         ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
 977                         ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
 978                         ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
 979 #ifdef SLAPD_MONITOR
 980                         for ( i = 0; i < SLAP_OP_LAST; i++ ) {
 981                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
 982                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
 983                         }
 984 #endif /* SLAPD_MONITOR */
 985                         slap_counters_destroy( sc );
 986                         ber_memfree_x( data, NULL );
 987                         break;
 988                 }
 989         }
 990         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
 991 }
 992
 993 static void
 994 conn_counter_init( Operation *op, void *ctx )
 995 {
 996         slap_counters_t *sc;
 997         void *vsc = NULL;
 998
 999         if ( ldap_pvt_thread_pool_getkey(
1000                         ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1001                 vsc = ch_malloc( sizeof( slap_counters_t ));
1002                 sc = vsc;
1003                 slap_counters_init( sc );
1004                 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1005                         conn_counter_destroy, NULL, NULL );
1006
1007                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1008                 sc->sc_next = slap_counters.sc_next;
1009                 slap_counters.sc_next = sc;
1010                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1011         }
1012         op->o_counters = vsc;
1013 }
1014
1015 static void *
1016 connection_operation( void *ctx, void *arg_v )
1017 {
1018         int rc = LDAP_OTHER, cancel;
1019         Operation *op = arg_v;
1020         SlapReply rs = {REP_RESULT};
1021         ber_tag_t tag = op->o_tag;
1022         slap_op_t opidx = SLAP_OP_LAST;
1023         Connection *conn = op->o_conn;
1024         void *memctx = NULL;
1025         void *memctx_null = NULL;
1026         ber_len_t memsiz;
1027
1028         conn_counter_init( op, ctx );
1029         ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1030         /* FIXME: returns 0 in case of failure */
1031         ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1032         ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1033
1034         op->o_threadctx = ctx;
1035         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1036
1037         switch ( tag ) {
1038         case LDAP_REQ_BIND:
1039         case LDAP_REQ_UNBIND:
1040         case LDAP_REQ_ADD:
1041         case LDAP_REQ_DELETE:
1042         case LDAP_REQ_MODDN:
1043         case LDAP_REQ_MODIFY:
1044         case LDAP_REQ_COMPARE:
1045         case LDAP_REQ_SEARCH:
1046         case LDAP_REQ_ABANDON:
1047         case LDAP_REQ_EXTENDED:
1048                 break;
1049         default:
1050                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1051                         "conn %lu unknown LDAP request 0x%lx\n",
1052                         conn->c_connid, tag, 0 );
1053                 op->o_tag = LBER_ERROR;
1054                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1055                 rs.sr_text = "unknown LDAP request";
1056                 send_ldap_disconnect( op, &rs );
1057                 rc = SLAPD_DISCONNECT;
1058                 goto operations_error;
1059         }
1060
1061         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1062                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1063                         "error: SASL bind in progress (tag=%ld).\n",
1064                         (long) tag, 0, 0 );
1065                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1066                         "SASL bind in progress" );
1067                 rc = LDAP_OPERATIONS_ERROR;
1068                 goto operations_error;
1069         }
1070
1071 #ifdef LDAP_X_TXN
1072         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1073                 ( tag == LDAP_REQ_ADD ) ||
1074                 ( tag == LDAP_REQ_DELETE ) ||
1075                 ( tag == LDAP_REQ_MODIFY ) ||
1076                 ( tag == LDAP_REQ_MODRDN )))
1077         {
1078                 /* Disable SLAB allocator for all update operations
1079                         issued inside of a transaction */
1080                 op->o_tmpmemctx = NULL;
1081                 op->o_tmpmfuncs = &ch_mfuncs;
1082         } else
1083 #endif
1084         {
1085         /* We can use Thread-Local storage for most mallocs. We can
1086          * also use TL for ber parsing, but not on Add or Modify.
1087          */
1088 #if 0
1089         memsiz = ber_len( op->o_ber ) * 64;
1090         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1091 #endif
1092         memsiz = SLAP_SLAB_SIZE;
1093
1094         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1095         op->o_tmpmemctx = memctx;
1096         op->o_tmpmfuncs = &slap_sl_mfuncs;
1097         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1098                 /* Note - the ber and its buffer are already allocated from
1099                  * regular memory; this only affects subsequent mallocs that
1100                  * ber_scanf may invoke.
1101                  */
1102                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1103         }
1104         }
1105
1106         opidx = slap_req2op( tag );
1107         assert( opidx != SLAP_OP_LAST );
1108         INCR_OP_INITIATED( opidx );
1109         rc = (*(opfun[opidx]))( op, &rs );
1110
1111 operations_error:
1112         if ( rc == SLAPD_DISCONNECT ) {
1113                 tag = LBER_ERROR;
1114
1115         } else if ( opidx != SLAP_OP_LAST ) {
1116                 /* increment completed operations count
1117                  * only if operation was initiated
1118                  * and rc != SLAPD_DISCONNECT */
1119                 INCR_OP_COMPLETED( opidx );
1120         }
1121
1122         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1123
1124         if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1125                 conn->c_conn_state = SLAP_C_ACTIVE;
1126
1127         cancel = op->o_cancel;
1128         if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1129                 if ( cancel == SLAP_CANCEL_REQ ) {
1130                         op->o_cancel = rc == SLAPD_ABANDON
1131                                 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1132                 }
1133
1134                 do {
1135                         /* Fake a cond_wait with thread_yield, then
1136                          * verify the result properly mutex-protected.
1137                          */
1138                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1139                         do {
1140                                 ldap_pvt_thread_yield();
1141                         } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1142                                         && cancel != SLAP_CANCEL_DONE );
1143                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1144                 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1145                                 && cancel != SLAP_CANCEL_DONE );
1146         }
1147
1148         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1149
1150         LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1151         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1152         conn->c_n_ops_executing--;
1153         conn->c_n_ops_completed++;
1154
1155         switch( tag ) {
1156         case LBER_ERROR:
1157         case LDAP_REQ_UNBIND:
1158                 /* c_mutex is locked */
1159                 connection_closing( conn,
1160                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1161                 break;
1162         }
1163
1164         connection_resched( conn );
1165         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1166         slap_op_free( op, ctx );
1167         return NULL;
1168 }
1169
1170 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1171
1172 Connection *connection_client_setup(
1173         ber_socket_t s,
1174         ldap_pvt_thread_start_t *func,
1175         void *arg )
1176 {
1177         Connection *c;
1178         ber_socket_t sfd = SLAP_SOCKNEW( s );
1179
1180         c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1181                 CONN_IS_CLIENT, 0, NULL
1182                 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1183         if ( c ) {
1184                 c->c_clientfunc = func;
1185                 c->c_clientarg = arg;
1186
1187                 slapd_add_internal( sfd, 0 );
1188         }
1189         return c;
1190 }
1191
1192 void connection_client_enable(
1193         Connection *c )
1194 {
1195         slapd_set_read( c->c_sd, 1 );
1196 }
1197
1198 void connection_client_stop(
1199         Connection *c )
1200 {
1201         Sockbuf *sb;
1202         ber_socket_t s = c->c_sd;
1203
1204         /* get (locked) connection */
1205         c = connection_get( s );
1206
1207         assert( c->c_conn_state == SLAP_C_CLIENT );
1208
1209         c->c_listener = NULL;
1210         c->c_conn_state = SLAP_C_INVALID;
1211         c->c_struct_state = SLAP_C_UNUSED;
1212         c->c_sd = AC_SOCKET_INVALID;
1213         c->c_close_reason = "?";                        /* should never be needed */
1214         sb = c->c_sb;
1215         c->c_sb = ber_sockbuf_alloc( );
1216         {
1217                 ber_len_t max = sockbuf_max_incoming;
1218                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1219         }
1220         slapd_remove( s, sb, 0, 1, 0 );
1221
1222         connection_return( c );
1223 }
1224
1225 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1226
1227 static void* connection_read_thread( void* ctx, void* argv )
1228 {
1229         int rc ;
1230         conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1231         ber_socket_t s = (long)argv;
1232
1233         /*
1234          * read incoming LDAP requests. If there is more than one,
1235          * the first one is returned with new_op
1236          */
1237         cri.ctx = ctx;
1238         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1239                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1240                 return (void*)(long)rc;
1241         }
1242
1243         /* execute a single queued request in the same thread */
1244         if( cri.op && !cri.nullop ) {
1245                 rc = (long)connection_operation( ctx, cri.op );
1246         } else if ( cri.func ) {
1247                 rc = (long)cri.func( ctx, cri.arg );
1248         }
1249
1250         return (void*)(long)rc;
1251 }
1252
1253 int connection_read_activate( ber_socket_t s )
1254 {
1255         int rc;
1256
1257         /*
1258          * suspend reading on this file descriptor until a connection processing
1259          * thread reads data on it. Otherwise the listener thread will repeatedly
1260          * submit the same event on it to the pool.
1261          */
1262         rc = slapd_clr_read( s, 0 );
1263         if ( rc )
1264                 return rc;
1265
1266         /* Don't let blocked writers block a pause request */
1267         if ( connections[s].c_writewaiter &&
1268                 ldap_pvt_thread_pool_pausing( &connection_pool ))
1269                 connection_wake_writers( &connections[s] );
1270
1271         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1272                 connection_read_thread, (void *)(long)s );
1273
1274         if( rc != 0 ) {
1275                 Debug( LDAP_DEBUG_ANY,
1276                         "connection_read_activate(%d): submit failed (%d)\n",
1277                         s, rc, 0 );
1278         }
1279
1280         return rc;
1281 }
1282
1283 static int
1284 connection_read( ber_socket_t s, conn_readinfo *cri )
1285 {
1286         int rc = 0;
1287         Connection *c;
1288
1289         assert( connections != NULL );
1290
1291         /* get (locked) connection */
1292         c = connection_get( s );
1293
1294         if( c == NULL ) {
1295                 Debug( LDAP_DEBUG_ANY,
1296                         "connection_read(%ld): no connection!\n",
1297                         (long) s, 0, 0 );
1298
1299                 return -1;
1300         }
1301
1302         c->c_n_read++;
1303
1304         if( c->c_conn_state == SLAP_C_CLOSING ) {
1305                 Debug( LDAP_DEBUG_CONNS,
1306                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1307                         s, c->c_connid, 0 );
1308                 connection_return( c );
1309                 return 0;
1310         }
1311
1312         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1313                 cri->func = c->c_clientfunc;
1314                 cri->arg = c->c_clientarg;
1315                 /* read should already be cleared */
1316                 connection_return( c );
1317                 return 0;
1318         }
1319
1320         Debug( LDAP_DEBUG_TRACE,
1321                 "connection_read(%d): checking for input on id=%lu\n",
1322                 s, c->c_connid, 0 );
1323
1324 #ifdef HAVE_TLS
1325         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1326                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1327                 if ( rc < 0 ) {
1328                         Debug( LDAP_DEBUG_TRACE,
1329                                 "connection_read(%d): TLS accept failure "
1330                                 "error=%d id=%lu, closing\n",
1331                                 s, rc, c->c_connid );
1332
1333                         c->c_needs_tls_accept = 0;
1334                         /* c_mutex is locked */
1335                         connection_closing( c, "TLS negotiation failure" );
1336                         connection_close( c );
1337                         connection_return( c );
1338                         return 0;
1339
1340                 } else if ( rc == 0 ) {
1341                         void *ssl;
1342                         struct berval authid = BER_BVNULL;
1343
1344                         c->c_needs_tls_accept = 0;
1345
1346                         /* we need to let SASL know */
1347                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1348
1349                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1350                         if( c->c_tls_ssf > c->c_ssf ) {
1351                                 c->c_ssf = c->c_tls_ssf;
1352                         }
1353
1354                         rc = dnX509peerNormalize( ssl, &authid );
1355                         if ( rc != LDAP_SUCCESS ) {
1356                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1357                                         "unable to get TLS client DN, error=%d id=%lu\n",
1358                                         s, rc, c->c_connid );
1359                         }
1360                         Statslog( LDAP_DEBUG_STATS,
1361                                 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1362                             c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1363                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1364                         if ( authid.bv_val ) free( authid.bv_val );
1365                 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1366                         LBER_SB_OPT_NEEDS_WRITE, NULL )) {      /* need to retry */
1367                         slapd_set_write( s, 1 );
1368                         connection_return( c );
1369                         return 0;
1370                 }
1371
1372                 /* if success and data is ready, fall thru to data input loop */
1373                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1374                 {
1375                         slapd_set_read( s, 1 );
1376                         connection_return( c );
1377                         return 0;
1378                 }
1379         }
1380 #endif
1381
1382 #ifdef HAVE_CYRUS_SASL
1383         if ( c->c_sasl_layers ) {
1384                 /* If previous layer is not removed yet, give up for now */
1385                 if ( !c->c_sasl_sockctx ) {
1386                         slapd_set_read( s, 1 );
1387                         connection_return( c );
1388                         return 0;
1389                 }
1390
1391                 c->c_sasl_layers = 0;
1392
1393                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1394                 if( rc != LDAP_SUCCESS ) {
1395                         Debug( LDAP_DEBUG_TRACE,
1396                                 "connection_read(%d): SASL install error "
1397                                 "error=%d id=%lu, closing\n",
1398                                 s, rc, c->c_connid );
1399
1400                         /* c_mutex is locked */
1401                         connection_closing( c, "SASL layer install failure" );
1402                         connection_close( c );
1403                         connection_return( c );
1404                         return 0;
1405                 }
1406         }
1407 #endif
1408
1409 #define CONNECTION_INPUT_LOOP 1
1410 /* #define      DATA_READY_LOOP 1 */
1411
1412         do {
1413                 /* How do we do this without getting into a busy loop ? */
1414                 rc = connection_input( c, cri );
1415         }
1416 #ifdef DATA_READY_LOOP
1417         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1418 #elif defined CONNECTION_INPUT_LOOP
1419         while(!rc);
1420 #else
1421         while(0);
1422 #endif
1423
1424         if( rc < 0 ) {
1425                 Debug( LDAP_DEBUG_CONNS,
1426                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1427                         s, rc, c->c_connid );
1428
1429                 /* c_mutex is locked */
1430                 connection_closing( c, conn_lost_str );
1431                 connection_close( c );
1432                 connection_return( c );
1433                 return 0;
1434         }
1435
1436         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1437                 slapd_set_write( s, 0 );
1438         }
1439
1440         slapd_set_read( s, 1 );
1441         connection_return( c );
1442
1443         return 0;
1444 }
1445
1446 static int
1447 connection_input( Connection *conn , conn_readinfo *cri )
1448 {
1449         Operation *op;
1450         ber_tag_t       tag;
1451         ber_len_t       len;
1452         ber_int_t       msgid;
1453         BerElement      *ber;
1454         int             rc;
1455 #ifdef LDAP_CONNECTIONLESS
1456         Sockaddr        peeraddr;
1457         char            *cdn = NULL;
1458 #endif
1459         char *defer = NULL;
1460         void *ctx;
1461
1462         if ( conn->c_currentber == NULL &&
1463                 ( conn->c_currentber = ber_alloc()) == NULL )
1464         {
1465                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1466                 return -1;
1467         }
1468
1469         sock_errset(0);
1470
1471 #ifdef LDAP_CONNECTIONLESS
1472         if ( conn->c_is_udp ) {
1473                 char peername[sizeof("IP=255.255.255.255:65336")];
1474
1475                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1476                 if (len != sizeof(struct sockaddr)) return 1;
1477
1478                 sprintf( peername, "IP=%s:%d",
1479                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1480                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1481                 Statslog( LDAP_DEBUG_STATS,
1482                         "conn=%lu UDP request from %s (%s) accepted.\n",
1483                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1484         }
1485 #endif
1486
1487         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1488         if ( tag != LDAP_TAG_MESSAGE ) {
1489                 int err = sock_errno();
1490
1491                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1492                         /* log, close and send error */
1493                         Debug( LDAP_DEBUG_TRACE,
1494                                 "ber_get_next on fd %d failed errno=%d (%s)\n",
1495                         conn->c_sd, err, sock_errstr(err) );
1496                         ber_free( conn->c_currentber, 1 );
1497                         conn->c_currentber = NULL;
1498
1499                         return -2;
1500                 }
1501                 return 1;
1502         }
1503
1504         ber = conn->c_currentber;
1505         conn->c_currentber = NULL;
1506
1507         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1508                 /* log, close and send error */
1509                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1510                 ber_free( ber, 1 );
1511                 return -1;
1512         }
1513
1514         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1515                 /* log, close and send error */
1516                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1517                 ber_free( ber, 1 );
1518
1519                 return -1;
1520         }
1521
1522 #ifdef LDAP_CONNECTIONLESS
1523         if( conn->c_is_udp ) {
1524                 if( tag == LBER_OCTETSTRING ) {
1525                         ber_get_stringa( ber, &cdn );
1526                         tag = ber_peek_tag(ber, &len);
1527                 }
1528                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1529                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1530                         ber_free( ber, 1 );
1531                         return 0;
1532                 }
1533         }
1534 #endif
1535
1536         if(tag == LDAP_REQ_BIND) {
1537                 /* immediately abandon all existing operations upon BIND */
1538                 connection_abandon( conn );
1539         }
1540
1541         ctx = cri->ctx;
1542         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1543
1544         Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1545                 (long) op->o_time, 0);
1546
1547         op->o_conn = conn;
1548         /* clear state if the connection is being reused from inactive */
1549         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1550                 memset( &conn->c_pagedresults_state, 0,
1551                         sizeof( conn->c_pagedresults_state ) );
1552         }
1553
1554         op->o_res_ber = NULL;
1555
1556 #ifdef LDAP_CONNECTIONLESS
1557         if (conn->c_is_udp) {
1558                 if ( cdn ) {
1559                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1560                         op->o_protocol = LDAP_VERSION2;
1561                 }
1562                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1563                 if (op->o_res_ber == NULL) return 1;
1564
1565                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1566                         sizeof(struct sockaddr), 0 );
1567
1568                 if (rc != sizeof(struct sockaddr)) {
1569                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1570                         return 1;
1571                 }
1572
1573                 if (op->o_protocol == LDAP_VERSION2) {
1574                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1575                         if (rc == -1) {
1576                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1577                                 return rc;
1578                         }
1579                 }
1580         }
1581 #endif /* LDAP_CONNECTIONLESS */
1582
1583         rc = 0;
1584
1585         /* Don't process requests when the conn is in the middle of a
1586          * Bind, or if it's closing. Also, don't let any single conn
1587          * use up all the available threads, and don't execute if we're
1588          * currently blocked on output. And don't execute if there are
1589          * already pending ops, let them go first.  Abandon operations
1590          * get exceptions to some, but not all, cases.
1591          */
1592         switch( tag ){
1593         default:
1594                 /* Abandon and Unbind are exempt from these checks */
1595                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1596                         defer = "closing";
1597                         break;
1598                 } else if (conn->c_writewaiter) {
1599                         defer = "awaiting write";
1600                         break;
1601                 } else if (conn->c_n_ops_pending) {
1602                         defer = "pending operations";
1603                         break;
1604                 }
1605                 /* FALLTHRU */
1606         case LDAP_REQ_ABANDON:
1607                 /* Unbind is exempt from these checks */
1608                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1609                         defer = "too many executing";
1610                         break;
1611                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1612                         defer = "binding";
1613                         break;
1614                 }
1615                 /* FALLTHRU */
1616         case LDAP_REQ_UNBIND:
1617                 break;
1618         }
1619
1620         if( defer ) {
1621                 int max = conn->c_dn.bv_len
1622                         ? slap_conn_max_pending_auth
1623                         : slap_conn_max_pending;
1624
1625                 Debug( LDAP_DEBUG_ANY,
1626                         "connection_input: conn=%lu deferring operation: %s\n",
1627                         conn->c_connid, defer, 0 );
1628                 conn->c_n_ops_pending++;
1629                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1630                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1631
1632         } else {
1633                 conn->c_n_ops_executing++;
1634
1635                 /*
1636                  * The first op will be processed in the same thread context,
1637                  * as long as there is only one op total.
1638                  * Subsequent ops will be submitted to the pool by
1639                  * calling connection_op_activate()
1640                  */
1641                 if ( cri->op == NULL ) {
1642                         /* the first incoming request */
1643                         connection_op_queue( op );
1644                         cri->op = op;
1645                 } else {
1646                         if ( !cri->nullop ) {
1647                                 cri->nullop = 1;
1648                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1649                                         connection_operation, (void *) cri->op );
1650                         }
1651                         connection_op_activate( op );
1652                 }
1653         }
1654
1655 #ifdef NO_THREADS
1656         if ( conn->c_struct_state != SLAP_C_USED ) {
1657                 /* connection must have got closed underneath us */
1658                 return 1;
1659         }
1660 #endif
1661
1662         assert( conn->c_struct_state == SLAP_C_USED );
1663         return rc;
1664 }
1665
1666 static int
1667 connection_resched( Connection *conn )
1668 {
1669         Operation *op;
1670
1671         if( conn->c_writewaiter )
1672                 return 0;
1673
1674         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1675                 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1676                         "attempting closing conn=%lu sd=%d\n",
1677                         conn->c_connid, conn->c_sd, 0 );
1678                 connection_close( conn );
1679                 return 0;
1680         }
1681
1682         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1683                 /* other states need different handling */
1684                 return 0;
1685         }
1686
1687         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1688                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1689
1690                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1691                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1692
1693                 /* pending operations should not be marked for abandonment */
1694                 assert(!op->o_abandon);
1695
1696                 conn->c_n_ops_pending--;
1697                 conn->c_n_ops_executing++;
1698
1699                 connection_op_activate( op );
1700
1701                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1702         }
1703         return 0;
1704 }
1705
1706 static void
1707 connection_init_log_prefix( Operation *op )
1708 {
1709         if ( op->o_connid == (unsigned long)(-1) ) {
1710                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1711                         "conn=-1 op=%lu", op->o_opid );
1712
1713         } else {
1714                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1715                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1716         }
1717 }
1718
1719 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1720 {
1721         op->o_conn->c_sasl_bindop = NULL;
1722
1723         ch_free( op->o_callback );
1724         op->o_callback = NULL;
1725
1726         return SLAP_CB_CONTINUE;
1727 }
1728
1729 static int connection_bind_cb( Operation *op, SlapReply *rs )
1730 {
1731         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1732         op->o_conn->c_sasl_bind_in_progress =
1733                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1734
1735         /* Moved here from bind.c due to ITS#4158 */
1736         op->o_conn->c_sasl_bindop = NULL;
1737         if ( op->orb_method == LDAP_AUTH_SASL ) {
1738                 if( rs->sr_err == LDAP_SUCCESS ) {
1739                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1740                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1741                                 /* edn is always normalized already */
1742                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1743                         }
1744                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1745                         BER_BVZERO( &op->orb_edn );
1746                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1747                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1748
1749                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1750                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1751                                 op->o_conn->c_ssf = op->orb_ssf;
1752                         }
1753
1754                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1755                                 ber_len_t max = sockbuf_max_incoming_auth;
1756                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1757                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1758                         }
1759
1760                         /* log authorization identity */
1761                         Statslog( LDAP_DEBUG_STATS,
1762                                 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1763                                 op->o_log_prefix,
1764                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1765                                 op->o_conn->c_authmech.bv_val,
1766                                 op->orb_ssf, op->o_conn->c_ssf );
1767
1768                         Debug( LDAP_DEBUG_TRACE,
1769                                 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1770                                 op->o_conn->c_authmech.bv_val,
1771                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1772                                 op->orb_ssf );
1773
1774                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1775                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1776                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1777                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1778                         }
1779                 }
1780         }
1781         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1782
1783         ch_free( op->o_callback );
1784         op->o_callback = NULL;
1785
1786         return SLAP_CB_CONTINUE;
1787 }
1788
1789 static void connection_op_queue( Operation *op )
1790 {
1791         ber_tag_t tag = op->o_tag;
1792
1793         if (tag == LDAP_REQ_BIND) {
1794                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1795                 sc->sc_response = connection_bind_cb;
1796                 sc->sc_cleanup = connection_bind_cleanup_cb;
1797                 sc->sc_next = op->o_callback;
1798                 op->o_callback = sc;
1799                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1800         }
1801
1802         if (!op->o_dn.bv_len) {
1803                 op->o_authz = op->o_conn->c_authz;
1804                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1805                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1806                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1807                 } else {
1808                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1809                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1810                 }
1811         }
1812
1813         op->o_authtype = op->o_conn->c_authtype;
1814         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1815
1816         if (!op->o_protocol) {
1817                 op->o_protocol = op->o_conn->c_protocol
1818                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1819         }
1820
1821         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1822                 op->o_protocol > LDAP_VERSION2)
1823         {
1824                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1825         }
1826
1827         op->o_connid = op->o_conn->c_connid;
1828         connection_init_log_prefix( op );
1829
1830         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1831 }
1832
1833 static int connection_op_activate( Operation *op )
1834 {
1835         int rc;
1836
1837         connection_op_queue( op );
1838
1839         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1840                 connection_operation, (void *) op );
1841
1842         if ( rc != 0 ) {
1843                 Debug( LDAP_DEBUG_ANY,
1844                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1845                         rc, op->o_connid, 0 );
1846                 /* should move op to pending list */
1847         }
1848
1849         return rc;
1850 }
1851
1852 int connection_write(ber_socket_t s)
1853 {
1854         Connection *c;
1855         Operation *op;
1856
1857         assert( connections != NULL );
1858
1859         slapd_clr_write( s, 0 );
1860
1861         c = connection_get( s );
1862         if( c == NULL ) {
1863                 Debug( LDAP_DEBUG_ANY,
1864                         "connection_write(%ld): no connection!\n",
1865                         (long)s, 0, 0 );
1866                 return -1;
1867         }
1868
1869 #ifdef HAVE_TLS
1870         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1871                 connection_return( c );
1872                 connection_read_activate( s );
1873                 return 0;
1874         }
1875 #endif
1876
1877         c->c_n_write++;
1878
1879         Debug( LDAP_DEBUG_TRACE,
1880                 "connection_write(%d): waking output for id=%lu\n",
1881                 s, c->c_connid, 0 );
1882         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1883         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1884         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1885
1886         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1887                 slapd_set_read( s, 1 );
1888         }
1889         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1890                 slapd_set_write( s, 1 );
1891         }
1892
1893         /* If there are ops pending because of a writewaiter,
1894          * start one up.
1895          */
1896         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1897                 if ( !c->c_writewaiter ) break;
1898                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1899
1900                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1901                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1902
1903                 /* pending operations should not be marked for abandonment */
1904                 assert(!op->o_abandon);
1905
1906                 c->c_n_ops_pending--;
1907                 c->c_n_ops_executing++;
1908
1909                 connection_op_activate( op );
1910
1911                 break;
1912         }
1913
1914         connection_return( c );
1915         return 0;
1916 }
1917
1918 #ifdef LDAP_SLAPI
1919 typedef struct conn_fake_extblock {
1920         void *eb_conn;
1921         void *eb_op;
1922 } conn_fake_extblock;
1923
1924 static void
1925 connection_fake_destroy(
1926         void *key,
1927         void *data )
1928 {
1929         Connection conn = {0};
1930         Operation op = {0};
1931         Opheader ohdr = {0};
1932
1933         conn_fake_extblock *eb = data;
1934
1935         op.o_hdr = &ohdr;
1936         op.o_hdr->oh_extensions = eb->eb_op;
1937         conn.c_extensions = eb->eb_conn;
1938         op.o_conn = &conn;
1939         conn.c_connid = -1;
1940         op.o_connid = -1;
1941
1942         ber_memfree_x( eb, NULL );
1943         slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1944         slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1945 }
1946 #endif
1947
1948 void
1949 connection_fake_init(
1950         Connection *conn,
1951         OperationBuffer *opbuf,
1952         void *ctx )
1953 {
1954         connection_fake_init2( conn, opbuf, ctx, 1 );
1955 }
1956
1957 void
1958 operation_fake_init(
1959         Connection *conn,
1960         Operation *op,
1961         void *ctx,
1962         int newmem )
1963 {
1964         /* set memory context */
1965         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
1966                 newmem );
1967         op->o_tmpmfuncs = &slap_sl_mfuncs;
1968         op->o_threadctx = ctx;
1969         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1970
1971         op->o_counters = &slap_counters;
1972         op->o_conn = conn;
1973         op->o_connid = op->o_conn->c_connid;
1974         connection_init_log_prefix( op );
1975 }
1976
1977
1978 void
1979 connection_fake_init2(
1980         Connection *conn,
1981         OperationBuffer *opbuf,
1982         void *ctx,
1983         int newmem )
1984 {
1985         Operation *op = (Operation *) opbuf;
1986
1987         conn->c_connid = -1;
1988         conn->c_conn_idx = -1;
1989         conn->c_send_ldap_result = slap_send_ldap_result;
1990         conn->c_send_search_entry = slap_send_search_entry;
1991         conn->c_send_search_reference = slap_send_search_reference;
1992         conn->c_send_ldap_extended = slap_send_ldap_extended;
1993         conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
1994         conn->c_listener = (Listener *)&dummy_list;
1995         conn->c_peer_domain = slap_empty_bv;
1996         conn->c_peer_name = slap_empty_bv;
1997
1998         memset( opbuf, 0, sizeof( *opbuf ));
1999         op->o_hdr = &opbuf->ob_hdr;
2000         op->o_controls = opbuf->ob_controls;
2001
2002         operation_fake_init( conn, op, ctx, newmem );
2003
2004 #ifdef LDAP_SLAPI
2005         if ( slapi_plugins_used ) {
2006                 conn_fake_extblock *eb;
2007                 void *ebx = NULL;
2008
2009                 /* Use thread keys to make sure these eventually get cleaned up */
2010                 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2011                                 &ebx, NULL )) {
2012                         eb = ch_malloc( sizeof( *eb ));
2013                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2014                         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2015                         eb->eb_conn = conn->c_extensions;
2016                         eb->eb_op = op->o_hdr->oh_extensions;
2017                         ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2018                                 eb, connection_fake_destroy, NULL, NULL );
2019                 } else {
2020                         eb = ebx;
2021                         conn->c_extensions = eb->eb_conn;
2022                         op->o_hdr->oh_extensions = eb->eb_op;
2023                 }
2024         }
2025 #endif /* LDAP_SLAPI */
2026
2027         slap_op_time( &op->o_time, &op->o_tincr );
2028 }
2029
2030 void
2031 connection_assign_nextid( Connection *conn )
2032 {
2033         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2034         conn->c_connid = conn_nextid++;
2035         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2036 }