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 1998-2013 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_CONNECTIONLESS
  43 #include "../../libraries/liblber/lber-int.h"   /* ber_int_sb_read() */
  44 #endif
  45
  46 #ifdef LDAP_SLAPI
  47 #include "slapi/slapi.h"
  48 #endif
  49
  50 /* protected by connections_mutex */
  51 static ldap_pvt_thread_mutex_t connections_mutex;
  52 static Connection *connections = NULL;
  53
  54 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
  55 static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET;
  56
  57 static const char conn_lost_str[] = "connection lost";
  58
  59 const char *
  60 connection_state2str( int state )
  61 {
  62         switch( state ) {
  63         case SLAP_C_INVALID:    return "!";
  64         case SLAP_C_INACTIVE:   return "|";
  65         case SLAP_C_CLOSING:    return "C";
  66         case SLAP_C_ACTIVE:             return "";
  67         case SLAP_C_BINDING:    return "B";
  68         case SLAP_C_CLIENT:             return "L";
  69         }
  70
  71         return "?";
  72 }
  73
  74 static Connection* connection_get( ber_socket_t s );
  75
  76 typedef struct conn_readinfo {
  77         Operation *op;
  78         ldap_pvt_thread_start_t *func;
  79         void *arg;
  80         void *ctx;
  81         int nullop;
  82 } conn_readinfo;
  83
  84 static int connection_input( Connection *c, conn_readinfo *cri );
  85 static void connection_close( Connection *c );
  86
  87 static int connection_op_activate( Operation *op );
  88 static void connection_op_queue( Operation *op );
  89 static int connection_resched( Connection *conn );
  90 static void connection_abandon( Connection *conn );
  91 static void connection_destroy( Connection *c );
  92
  93 static ldap_pvt_thread_start_t connection_operation;
  94
  95 /*
  96  * Initialize connection management infrastructure.
  97  */
  98 int connections_init(void)
  99 {
 100         int i;
 101
 102         assert( connections == NULL );
 103
 104         if( connections != NULL) {
 105                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 106                         0, 0, 0 );
 107                 return -1;
 108         }
 109
 110         /* should check return of every call */
 111         ldap_pvt_thread_mutex_init( &connections_mutex );
 112         ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 113
 114         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 115
 116         if( connections == NULL ) {
 117                 Debug( LDAP_DEBUG_ANY, "connections_init: "
 118                         "allocation (%d*%ld) of connection array failed\n",
 119                         dtblsize, (long) sizeof(Connection), 0 );
 120                 return -1;
 121         }
 122
 123         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 124         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 125
 126         for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 127
 128         /*
 129          * per entry initialization of the Connection array initialization
 130          * will be done by connection_init()
 131          */
 132
 133         return 0;
 134 }
 135
 136 /*
 137  * Destroy connection management infrastructure.
 138  */
 139
 140 int connections_destroy(void)
 141 {
 142         ber_socket_t i;
 143
 144         /* should check return of every call */
 145
 146         if( connections == NULL) {
 147                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 148                         0, 0, 0 );
 149                 return -1;
 150         }
 151
 152         for ( i = 0; i < dtblsize; i++ ) {
 153                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 154                         ber_sockbuf_free( connections[i].c_sb );
 155                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 156                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
 157                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
 158                         ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
 159                         ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
 160 #ifdef LDAP_SLAPI
 161                         if ( slapi_plugins_used ) {
 162                                 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
 163                                         &connections[i] );
 164                         }
 165 #endif
 166                 }
 167         }
 168
 169         free( connections );
 170         connections = NULL;
 171
 172         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 173         ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
 174         return 0;
 175 }
 176
 177 /*
 178  * shutdown all connections
 179  */
 180 int connections_shutdown(void)
 181 {
 182         ber_socket_t i;
 183
 184         for ( i = 0; i < dtblsize; i++ ) {
 185                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 186                         ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 187                         if( connections[i].c_struct_state == SLAP_C_USED ) {
 188
 189                                 /* give persistent clients a chance to cleanup */
 190                                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 191                                         ldap_pvt_thread_pool_submit( &connection_pool,
 192                                         connections[i].c_clientfunc, connections[i].c_clientarg );
 193                                 } else {
 194                                         /* c_mutex is locked */
 195                                         connection_closing( &connections[i], "slapd shutdown" );
 196                                         connection_close( &connections[i] );
 197                                 }
 198                         }
 199                         ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 200                 }
 201         }
 202
 203         return 0;
 204 }
 205
 206 /*
 207  * Timeout idle connections.
 208  */
 209 int connections_timeout_idle(time_t now)
 210 {
 211         int i = 0, writers = 0;
 212         ber_socket_t connindex;
 213         Connection* c;
 214         time_t old;
 215
 216         old = slapd_get_writetime();
 217
 218         for( c = connection_first( &connindex );
 219                 c != NULL;
 220                 c = connection_next( c, &connindex ) )
 221         {
 222                 /* Don't timeout a slow-running request or a persistent
 223                  * outbound connection. But if it has a writewaiter, see
 224                  * if the waiter has been there too long.
 225                  */
 226                 if(( c->c_n_ops_executing && !c->c_writewaiter)
 227                         || c->c_conn_state == SLAP_C_CLIENT ) {
 228                         continue;
 229                 }
 230
 231                 if( global_idletimeout &&
 232                         difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 233                         /* close it */
 234                         connection_closing( c, "idletimeout" );
 235                         connection_close( c );
 236                         i++;
 237                         continue;
 238                 }
 239                 if ( c->c_writewaiter && global_writetimeout ) {
 240                         writers = 1;
 241                         if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
 242                                 /* close it */
 243                                 connection_closing( c, "writetimeout" );
 244                                 connection_close( c );
 245                                 i++;
 246                                 continue;
 247                         }
 248                 }
 249         }
 250         connection_done( c );
 251         if ( old && !writers )
 252                 slapd_clr_writetime( old );
 253
 254         return i;
 255 }
 256
 257 /* Drop all client connections */
 258 void connections_drop()
 259 {
 260         Connection* c;
 261         ber_socket_t connindex;
 262
 263         for( c = connection_first( &connindex );
 264                 c != NULL;
 265                 c = connection_next( c, &connindex ) )
 266         {
 267                 /* Don't close a slow-running request or a persistent
 268                  * outbound connection.
 269                  */
 270                 if(( c->c_n_ops_executing && !c->c_writewaiter)
 271                         || c->c_conn_state == SLAP_C_CLIENT ) {
 272                         continue;
 273                 }
 274                 connection_closing( c, "dropping" );
 275                 connection_close( c );
 276         }
 277         connection_done( c );
 278 }
 279
 280 static Connection* connection_get( ber_socket_t s )
 281 {
 282         Connection *c;
 283
 284         Debug( LDAP_DEBUG_ARGS,
 285                 "connection_get(%ld)\n",
 286                 (long) s, 0, 0 );
 287
 288         assert( connections != NULL );
 289
 290         if(s == AC_SOCKET_INVALID) return NULL;
 291
 292         assert( s < dtblsize );
 293         c = &connections[s];
 294
 295         if( c != NULL ) {
 296                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 297
 298                 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 299
 300                 if( c->c_struct_state != SLAP_C_USED ) {
 301                         /* connection must have been closed due to resched */
 302
 303                         Debug( LDAP_DEBUG_CONNS,
 304                                 "connection_get(%d): connection not used\n",
 305                                 s, 0, 0 );
 306                         assert( c->c_conn_state == SLAP_C_INVALID );
 307                         assert( c->c_sd == AC_SOCKET_INVALID );
 308
 309                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 310                         return NULL;
 311                 }
 312
 313                 Debug( LDAP_DEBUG_TRACE,
 314                         "connection_get(%d): got connid=%lu\n",
 315                         s, c->c_connid, 0 );
 316
 317                 c->c_n_get++;
 318
 319                 assert( c->c_struct_state == SLAP_C_USED );
 320                 assert( c->c_conn_state != SLAP_C_INVALID );
 321                 assert( c->c_sd != AC_SOCKET_INVALID );
 322
 323 #ifndef SLAPD_MONITOR
 324                 if ( global_idletimeout > 0 )
 325 #endif /* ! SLAPD_MONITOR */
 326                 {
 327                         c->c_activitytime = slap_get_time();
 328                 }
 329         }
 330
 331         return c;
 332 }
 333
 334 static void connection_return( Connection *c )
 335 {
 336         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 337 }
 338
 339 Connection * connection_init(
 340         ber_socket_t s,
 341         Listener *listener,
 342         const char* dnsname,
 343         const char* peername,
 344         int flags,
 345         slap_ssf_t ssf,
 346         struct berval *authid
 347         LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
 348 {
 349         unsigned long id;
 350         Connection *c;
 351         int doinit = 0;
 352         ber_socket_t sfd = SLAP_FD2SOCK(s);
 353
 354         assert( connections != NULL );
 355
 356         assert( listener != NULL );
 357         assert( dnsname != NULL );
 358         assert( peername != NULL );
 359
 360 #ifndef HAVE_TLS
 361         assert( !( flags & CONN_IS_TLS ));
 362 #endif
 363
 364         if( s == AC_SOCKET_INVALID ) {
 365                 Debug( LDAP_DEBUG_ANY,
 366                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 367                 return NULL;
 368         }
 369
 370         assert( s >= 0 );
 371         assert( s < dtblsize );
 372         c = &connections[s];
 373         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 374                 doinit = 1;
 375         } else {
 376                 assert( c->c_struct_state == SLAP_C_UNUSED );
 377         }
 378
 379         if( doinit ) {
 380                 c->c_send_ldap_result = slap_send_ldap_result;
 381                 c->c_send_search_entry = slap_send_search_entry;
 382                 c->c_send_search_reference = slap_send_search_reference;
 383                 c->c_send_ldap_extended = slap_send_ldap_extended;
 384                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 385
 386                 BER_BVZERO( &c->c_authmech );
 387                 BER_BVZERO( &c->c_dn );
 388                 BER_BVZERO( &c->c_ndn );
 389
 390                 c->c_listener = NULL;
 391                 BER_BVZERO( &c->c_peer_domain );
 392                 BER_BVZERO( &c->c_peer_name );
 393
 394                 LDAP_STAILQ_INIT(&c->c_ops);
 395                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 396
 397 #ifdef LDAP_X_TXN
 398                 c->c_txn = CONN_TXN_INACTIVE;
 399                 c->c_txn_backend = NULL;
 400                 LDAP_STAILQ_INIT(&c->c_txn_ops);
 401 #endif
 402
 403                 BER_BVZERO( &c->c_sasl_bind_mech );
 404                 c->c_sasl_done = 0;
 405                 c->c_sasl_authctx = NULL;
 406                 c->c_sasl_sockctx = NULL;
 407                 c->c_sasl_extra = NULL;
 408                 c->c_sasl_bindop = NULL;
 409                 c->c_sasl_cbind = NULL;
 410
 411                 c->c_sb = ber_sockbuf_alloc( );
 412
 413                 {
 414                         ber_len_t max = sockbuf_max_incoming;
 415                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 416                 }
 417
 418                 c->c_currentber = NULL;
 419
 420                 /* should check status of thread calls */
 421                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 422                 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
 423                 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
 424                 ldap_pvt_thread_cond_init( &c->c_write1_cv );
 425                 ldap_pvt_thread_cond_init( &c->c_write2_cv );
 426
 427 #ifdef LDAP_SLAPI
 428                 if ( slapi_plugins_used ) {
 429                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 430                 }
 431 #endif
 432         }
 433
 434         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 435
 436         assert( BER_BVISNULL( &c->c_authmech ) );
 437         assert( BER_BVISNULL( &c->c_dn ) );
 438         assert( BER_BVISNULL( &c->c_ndn ) );
 439         assert( c->c_listener == NULL );
 440         assert( BER_BVISNULL( &c->c_peer_domain ) );
 441         assert( BER_BVISNULL( &c->c_peer_name ) );
 442         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 443         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 444 #ifdef LDAP_X_TXN
 445         assert( c->c_txn == CONN_TXN_INACTIVE );
 446         assert( c->c_txn_backend == NULL );
 447         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 448 #endif
 449         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 450         assert( c->c_sasl_done == 0 );
 451         assert( c->c_sasl_authctx == NULL );
 452         assert( c->c_sasl_sockctx == NULL );
 453         assert( c->c_sasl_extra == NULL );
 454         assert( c->c_sasl_bindop == NULL );
 455         assert( c->c_sasl_cbind == NULL );
 456         assert( c->c_currentber == NULL );
 457         assert( c->c_writewaiter == 0);
 458         assert( c->c_writers == 0);
 459
 460         c->c_listener = listener;
 461         c->c_sd = s;
 462
 463         if ( flags & CONN_IS_CLIENT ) {
 464                 c->c_connid = 0;
 465                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 466                 c->c_conn_state = SLAP_C_CLIENT;
 467                 c->c_struct_state = SLAP_C_USED;
 468                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 469                 c->c_close_reason = "?";                        /* should never be needed */
 470                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
 471                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 472
 473                 return c;
 474         }
 475
 476         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 477         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 478
 479         c->c_n_ops_received = 0;
 480         c->c_n_ops_executing = 0;
 481         c->c_n_ops_pending = 0;
 482         c->c_n_ops_completed = 0;
 483
 484         c->c_n_get = 0;
 485         c->c_n_read = 0;
 486         c->c_n_write = 0;
 487
 488         /* set to zero until bind, implies LDAP_VERSION3 */
 489         c->c_protocol = 0;
 490
 491 #ifndef SLAPD_MONITOR
 492         if ( global_idletimeout > 0 )
 493 #endif /* ! SLAPD_MONITOR */
 494         {
 495                 c->c_activitytime = c->c_starttime = slap_get_time();
 496         }
 497
 498 #ifdef LDAP_CONNECTIONLESS
 499         c->c_is_udp = 0;
 500         if( flags & CONN_IS_UDP ) {
 501                 c->c_is_udp = 1;
 502 #ifdef LDAP_DEBUG
 503                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 504                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 505 #endif
 506                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 507                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 508                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 509                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 510         } else
 511 #endif /* LDAP_CONNECTIONLESS */
 512 #ifdef LDAP_PF_LOCAL
 513         if ( flags & CONN_IS_IPC ) {
 514 #ifdef LDAP_DEBUG
 515                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 516                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 517 #endif
 518                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
 519                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 520 #ifdef LDAP_PF_LOCAL_SENDMSG
 521                 if ( !BER_BVISEMPTY( peerbv ))
 522                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
 523 #endif
 524         } else
 525 #endif /* LDAP_PF_LOCAL */
 526         {
 527 #ifdef LDAP_DEBUG
 528                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 529                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 530 #endif
 531                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 532                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 533         }
 534
 535 #ifdef LDAP_DEBUG
 536         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 537                 INT_MAX, (void*)"ldap_" );
 538 #endif
 539
 540         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 541                 c /* non-NULL */ ) < 0 )
 542         {
 543                 Debug( LDAP_DEBUG_ANY,
 544                         "connection_init(%d, %s): set nonblocking failed\n",
 545                         s, c->c_peer_name.bv_val, 0 );
 546         }
 547
 548         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 549         id = c->c_connid = conn_nextid++;
 550         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 551
 552         ldap_pvt_thread_mutex_lock( &connections_mutex );
 553         c->c_conn_state = SLAP_C_INACTIVE;
 554         c->c_struct_state = SLAP_C_USED;
 555         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 556         c->c_close_reason = "?";                        /* should never be needed */
 557
 558         c->c_ssf = c->c_transport_ssf = ssf;
 559         c->c_tls_ssf = 0;
 560
 561 #ifdef HAVE_TLS
 562         if ( flags & CONN_IS_TLS ) {
 563                 c->c_is_tls = 1;
 564                 c->c_needs_tls_accept = 1;
 565         } else {
 566                 c->c_is_tls = 0;
 567                 c->c_needs_tls_accept = 0;
 568         }
 569 #endif
 570
 571         slap_sasl_open( c, 0 );
 572         slap_sasl_external( c, ssf, authid );
 573
 574         slapd_add_internal( s, 1 );
 575
 576         backend_connection_init(c);
 577         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 578
 579         if ( !(flags & CONN_IS_UDP ))
 580                 Statslog( LDAP_DEBUG_STATS,
 581                         "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
 582                         id, (long) s, peername, listener->sl_name.bv_val, 0 );
 583
 584         return c;
 585 }
 586
 587 void connection2anonymous( Connection *c )
 588 {
 589         assert( connections != NULL );
 590         assert( c != NULL );
 591
 592         {
 593                 ber_len_t max = sockbuf_max_incoming;
 594                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 595         }
 596
 597         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 598                 ch_free(c->c_authmech.bv_val);
 599         }
 600         BER_BVZERO( &c->c_authmech );
 601
 602         if ( !BER_BVISNULL( &c->c_dn ) ) {
 603                 ch_free(c->c_dn.bv_val);
 604         }
 605         BER_BVZERO( &c->c_dn );
 606
 607         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 608                 ch_free(c->c_ndn.bv_val);
 609         }
 610         BER_BVZERO( &c->c_ndn );
 611
 612         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 613                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 614         }
 615         BER_BVZERO( &c->c_sasl_authz_dn );
 616
 617         c->c_authz_backend = NULL;
 618 }
 619
 620 static void
 621 connection_destroy( Connection *c )
 622 {
 623         unsigned long   connid;
 624         const char              *close_reason;
 625         Sockbuf                 *sb;
 626         ber_socket_t    sd;
 627
 628         assert( connections != NULL );
 629         assert( c != NULL );
 630         assert( c->c_struct_state != SLAP_C_UNUSED );
 631         assert( c->c_conn_state != SLAP_C_INVALID );
 632         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 633         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 634 #ifdef LDAP_X_TXN
 635         assert( c->c_txn == CONN_TXN_INACTIVE );
 636         assert( c->c_txn_backend == NULL );
 637         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 638 #endif
 639         assert( c->c_writewaiter == 0);
 640         assert( c->c_writers == 0);
 641
 642         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 643         connid = c->c_connid;
 644         close_reason = c->c_close_reason;
 645
 646         ldap_pvt_thread_mutex_lock( &connections_mutex );
 647         c->c_struct_state = SLAP_C_PENDING;
 648         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 649
 650         backend_connection_destroy(c);
 651
 652         c->c_protocol = 0;
 653         c->c_connid = -1;
 654
 655         c->c_activitytime = c->c_starttime = 0;
 656
 657         connection2anonymous( c );
 658         c->c_listener = NULL;
 659
 660         if(c->c_peer_domain.bv_val != NULL) {
 661                 free(c->c_peer_domain.bv_val);
 662         }
 663         BER_BVZERO( &c->c_peer_domain );
 664         if(c->c_peer_name.bv_val != NULL) {
 665                 free(c->c_peer_name.bv_val);
 666         }
 667         BER_BVZERO( &c->c_peer_name );
 668
 669         c->c_sasl_bind_in_progress = 0;
 670         if(c->c_sasl_bind_mech.bv_val != NULL) {
 671                 free(c->c_sasl_bind_mech.bv_val);
 672         }
 673         BER_BVZERO( &c->c_sasl_bind_mech );
 674
 675         slap_sasl_close( c );
 676
 677         if ( c->c_currentber != NULL ) {
 678                 ber_free( c->c_currentber, 1 );
 679                 c->c_currentber = NULL;
 680         }
 681
 682
 683 #ifdef LDAP_SLAPI
 684         /* call destructors, then constructors; avoids unnecessary allocation */
 685         if ( slapi_plugins_used ) {
 686                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 687         }
 688 #endif
 689
 690         sd = c->c_sd;
 691         c->c_sd = AC_SOCKET_INVALID;
 692         c->c_conn_state = SLAP_C_INVALID;
 693         c->c_struct_state = SLAP_C_UNUSED;
 694         c->c_close_reason = "?";                        /* should never be needed */
 695
 696         sb = c->c_sb;
 697         c->c_sb = ber_sockbuf_alloc( );
 698         {
 699                 ber_len_t max = sockbuf_max_incoming;
 700                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 701         }
 702
 703         /* c must be fully reset by this point; when we call slapd_remove
 704          * it may get immediately reused by a new connection.
 705          */
 706         if ( sd != AC_SOCKET_INVALID ) {
 707                 slapd_remove( sd, sb, 1, 0, 0 );
 708
 709                 if ( close_reason == NULL ) {
 710                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
 711                                 connid, (long) sd, 0, 0, 0 );
 712                 } else {
 713                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
 714                                 connid, (long) sd, close_reason, 0, 0 );
 715                 }
 716         }
 717 }
 718
 719 int connection_valid( Connection *c )
 720 {
 721         /* c_mutex must be locked by caller */
 722
 723         assert( c != NULL );
 724
 725         return c->c_struct_state == SLAP_C_USED &&
 726                 c->c_conn_state >= SLAP_C_ACTIVE &&
 727                 c->c_conn_state <= SLAP_C_CLIENT;
 728 }
 729
 730 static void connection_abandon( Connection *c )
 731 {
 732         /* c_mutex must be locked by caller */
 733
 734         Operation *o, *next, op = {0};
 735         Opheader ohdr = {0};
 736
 737         op.o_hdr = &ohdr;
 738         op.o_conn = c;
 739         op.o_connid = c->c_connid;
 740         op.o_tag = LDAP_REQ_ABANDON;
 741
 742         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 743                 SlapReply rs = {REP_RESULT};
 744
 745                 next = LDAP_STAILQ_NEXT( o, o_next );
 746                 op.orn_msgid = o->o_msgid;
 747                 o->o_abandon = 1;
 748                 op.o_bd = frontendDB;
 749                 frontendDB->be_abandon( &op, &rs );
 750         }
 751
 752 #ifdef LDAP_X_TXN
 753         /* remove operations in pending transaction */
 754         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 755                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 756                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 757                 slap_op_free( o, NULL );
 758         }
 759
 760         /* clear transaction */
 761         c->c_txn_backend = NULL;
 762         c->c_txn = CONN_TXN_INACTIVE;
 763 #endif
 764
 765         /* remove pending operations */
 766         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 767                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 768                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 769                 slap_op_free( o, NULL );
 770         }
 771 }
 772
 773 static void
 774 connection_wake_writers( Connection *c )
 775 {
 776         /* wake write blocked operations */
 777         ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 778         if ( c->c_writers > 0 ) {
 779                 c->c_writers = -c->c_writers;
 780                 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
 781                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 782                 if ( c->c_writewaiter ) {
 783                         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
 784                         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
 785                         slapd_clr_write( c->c_sd, 1 );
 786                         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
 787                 }
 788                 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 789                 while ( c->c_writers ) {
 790                         ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
 791                 }
 792                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 793         } else {
 794                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 795                 slapd_clr_write( c->c_sd, 1 );
 796         }
 797 }
 798
 799 void connection_closing( Connection *c, const char *why )
 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_INVALID );
 807
 808         /* c_mutex must be locked by caller */
 809
 810         if( c->c_conn_state != SLAP_C_CLOSING ) {
 811                 Debug( LDAP_DEBUG_CONNS,
 812                         "connection_closing: readying conn=%lu sd=%d for close\n",
 813                         c->c_connid, c->c_sd, 0 );
 814                 /* update state to closing */
 815                 c->c_conn_state = SLAP_C_CLOSING;
 816                 c->c_close_reason = why;
 817
 818                 /* don't listen on this port anymore */
 819                 slapd_clr_read( c->c_sd, 0 );
 820
 821                 /* abandon active operations */
 822                 connection_abandon( c );
 823
 824                 /* wake write blocked operations */
 825                 connection_wake_writers( c );
 826
 827         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 828                 /* Client closed connection after doing Unbind. */
 829                 c->c_close_reason = NULL;
 830         }
 831 }
 832
 833 static void
 834 connection_close( Connection *c )
 835 {
 836         assert( connections != NULL );
 837         assert( c != NULL );
 838
 839         if ( c->c_struct_state != SLAP_C_USED ) return;
 840
 841         assert( c->c_conn_state == SLAP_C_CLOSING );
 842
 843         /* NOTE: c_mutex should be locked by caller */
 844
 845         if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
 846                 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
 847         {
 848                 Debug( LDAP_DEBUG_CONNS,
 849                         "connection_close: deferring conn=%lu sd=%d\n",
 850                         c->c_connid, c->c_sd, 0 );
 851                 return;
 852         }
 853
 854         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 855                 c->c_connid, c->c_sd, 0 );
 856
 857         connection_destroy( c );
 858 }
 859
 860 unsigned long connections_nextid(void)
 861 {
 862         unsigned long id;
 863         assert( connections != NULL );
 864
 865         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 866
 867         id = conn_nextid;
 868
 869         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 870
 871         return id;
 872 }
 873
 874 /*
 875  * Loop through the connections:
 876  *
 877  *      for (c = connection_first(&i); c; c = connection_next(c, &i)) ...;
 878  *      connection_done(c);
 879  *
 880  * 'i' is the cursor, initialized by connection_first().
 881  * 'c_mutex' is locked in the returned connection.  The functions must
 882  * be passed the previous return value so they can unlock it again.
 883  */
 884
 885 Connection* connection_first( ber_socket_t *index )
 886 {
 887         assert( connections != NULL );
 888         assert( index != NULL );
 889
 890         ldap_pvt_thread_mutex_lock( &connections_mutex );
 891         for( *index = 0; *index < dtblsize; (*index)++) {
 892                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 893                         break;
 894                 }
 895         }
 896         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 897
 898         return connection_next(NULL, index);
 899 }
 900
 901 /* Next connection in loop, see connection_first() */
 902 Connection* connection_next( Connection *c, ber_socket_t *index )
 903 {
 904         assert( connections != NULL );
 905         assert( index != NULL );
 906         assert( *index <= dtblsize );
 907
 908         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 909
 910         c = NULL;
 911
 912         ldap_pvt_thread_mutex_lock( &connections_mutex );
 913         for(; *index < dtblsize; (*index)++) {
 914                 int c_struct;
 915                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 916                         /* FIXME: accessing c_conn_state without locking c_mutex */
 917                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 918                         continue;
 919                 }
 920
 921                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 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                         assert( c->c_conn_state != SLAP_C_INVALID );
 935                         break;
 936                 }
 937
 938                 c_struct = connections[*index].c_struct_state;
 939                 if ( c_struct == SLAP_C_PENDING )
 940                         continue;
 941                 assert( c_struct == SLAP_C_UNUSED );
 942                 /* FIXME: accessing c_conn_state without locking c_mutex */
 943                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 944         }
 945
 946         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 947         return c;
 948 }
 949
 950 /* End connection loop, see connection_first() */
 951 void connection_done( Connection *c )
 952 {
 953         assert( connections != NULL );
 954
 955         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 956 }
 957
 958 /*
 959  * connection_activity - handle the request operation op on connection
 960  * conn.  This routine figures out what kind of operation it is and
 961  * calls the appropriate stub to handle it.
 962  */
 963
 964 #ifdef SLAPD_MONITOR
 965 /* FIXME: returns 0 in case of failure */
 966 #define INCR_OP_INITIATED(index) \
 967         do { \
 968                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 969                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
 970                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 971         } while (0)
 972 #define INCR_OP_COMPLETED(index) \
 973         do { \
 974                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 975                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 976                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
 977                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 978         } while (0)
 979 #else /* !SLAPD_MONITOR */
 980 #define INCR_OP_INITIATED(index) do { } while (0)
 981 #define INCR_OP_COMPLETED(index) \
 982         do { \
 983                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 984                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 985                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 986         } while (0)
 987 #endif /* !SLAPD_MONITOR */
 988
 989 /*
 990  * NOTE: keep in sync with enum in slapd.h
 991  */
 992 static BI_op_func *opfun[] = {
 993         do_bind,
 994         do_unbind,
 995         do_search,
 996         do_compare,
 997         do_modify,
 998         do_modrdn,
 999         do_add,
1000         do_delete,
1001         do_abandon,
1002         do_extended,
1003         NULL
1004 };
1005
1006 /* Counters are per-thread, not per-connection.
1007  */
1008 static void
1009 conn_counter_destroy( void *key, void *data )
1010 {
1011         slap_counters_t **prev, *sc;
1012
1013         ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1014         for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
1015                 prev = &sc->sc_next, sc = sc->sc_next ) {
1016                 if ( sc == data ) {
1017                         int i;
1018
1019                         *prev = sc->sc_next;
1020                         /* Copy data to main counter */
1021                         ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1022                         ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1023                         ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1024                         ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1025                         ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1026                         ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1027 #ifdef SLAPD_MONITOR
1028                         for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1029                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1030                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1031                         }
1032 #endif /* SLAPD_MONITOR */
1033                         slap_counters_destroy( sc );
1034                         ber_memfree_x( data, NULL );
1035                         break;
1036                 }
1037         }
1038         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1039 }
1040
1041 static void
1042 conn_counter_init( Operation *op, void *ctx )
1043 {
1044         slap_counters_t *sc;
1045         void *vsc = NULL;
1046
1047         if ( ldap_pvt_thread_pool_getkey(
1048                         ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1049                 vsc = ch_malloc( sizeof( slap_counters_t ));
1050                 sc = vsc;
1051                 slap_counters_init( sc );
1052                 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1053                         conn_counter_destroy, NULL, NULL );
1054
1055                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1056                 sc->sc_next = slap_counters.sc_next;
1057                 slap_counters.sc_next = sc;
1058                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1059         }
1060         op->o_counters = vsc;
1061 }
1062
1063 static void *
1064 connection_operation( void *ctx, void *arg_v )
1065 {
1066         int rc = LDAP_OTHER, cancel;
1067         Operation *op = arg_v;
1068         SlapReply rs = {REP_RESULT};
1069         ber_tag_t tag = op->o_tag;
1070         slap_op_t opidx = SLAP_OP_LAST;
1071         Connection *conn = op->o_conn;
1072         void *memctx = NULL;
1073         void *memctx_null = NULL;
1074         ber_len_t memsiz;
1075
1076         conn_counter_init( op, ctx );
1077         ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1078         /* FIXME: returns 0 in case of failure */
1079         ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1080         ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1081
1082         op->o_threadctx = ctx;
1083         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1084
1085         switch ( tag ) {
1086         case LDAP_REQ_BIND:
1087         case LDAP_REQ_UNBIND:
1088         case LDAP_REQ_ADD:
1089         case LDAP_REQ_DELETE:
1090         case LDAP_REQ_MODDN:
1091         case LDAP_REQ_MODIFY:
1092         case LDAP_REQ_COMPARE:
1093         case LDAP_REQ_SEARCH:
1094         case LDAP_REQ_ABANDON:
1095         case LDAP_REQ_EXTENDED:
1096                 break;
1097         default:
1098                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1099                         "conn %lu unknown LDAP request 0x%lx\n",
1100                         conn->c_connid, tag, 0 );
1101                 op->o_tag = LBER_ERROR;
1102                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1103                 rs.sr_text = "unknown LDAP request";
1104                 send_ldap_disconnect( op, &rs );
1105                 rc = SLAPD_DISCONNECT;
1106                 goto operations_error;
1107         }
1108
1109         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1110                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1111                         "error: SASL bind in progress (tag=%ld).\n",
1112                         (long) tag, 0, 0 );
1113                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1114                         "SASL bind in progress" );
1115                 rc = LDAP_OPERATIONS_ERROR;
1116                 goto operations_error;
1117         }
1118
1119 #ifdef LDAP_X_TXN
1120         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1121                 ( tag == LDAP_REQ_ADD ) ||
1122                 ( tag == LDAP_REQ_DELETE ) ||
1123                 ( tag == LDAP_REQ_MODIFY ) ||
1124                 ( tag == LDAP_REQ_MODRDN )))
1125         {
1126                 /* Disable SLAB allocator for all update operations
1127                         issued inside of a transaction */
1128                 op->o_tmpmemctx = NULL;
1129                 op->o_tmpmfuncs = &ch_mfuncs;
1130         } else
1131 #endif
1132         {
1133         /* We can use Thread-Local storage for most mallocs. We can
1134          * also use TL for ber parsing, but not on Add or Modify.
1135          */
1136 #if 0
1137         memsiz = ber_len( op->o_ber ) * 64;
1138         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1139 #endif
1140         memsiz = SLAP_SLAB_SIZE;
1141
1142         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1143         op->o_tmpmemctx = memctx;
1144         op->o_tmpmfuncs = &slap_sl_mfuncs;
1145         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1146                 /* Note - the ber and its buffer are already allocated from
1147                  * regular memory; this only affects subsequent mallocs that
1148                  * ber_scanf may invoke.
1149                  */
1150                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1151         }
1152         }
1153
1154         opidx = slap_req2op( tag );
1155         assert( opidx != SLAP_OP_LAST );
1156         INCR_OP_INITIATED( opidx );
1157         rc = (*(opfun[opidx]))( op, &rs );
1158
1159 operations_error:
1160         if ( rc == SLAPD_DISCONNECT ) {
1161                 tag = LBER_ERROR;
1162
1163         } else if ( opidx != SLAP_OP_LAST ) {
1164                 /* increment completed operations count
1165                  * only if operation was initiated
1166                  * and rc != SLAPD_DISCONNECT */
1167                 INCR_OP_COMPLETED( opidx );
1168         }
1169
1170         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1171
1172         if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1173                 conn->c_conn_state = SLAP_C_ACTIVE;
1174
1175         cancel = op->o_cancel;
1176         if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1177                 if ( cancel == SLAP_CANCEL_REQ ) {
1178                         op->o_cancel = rc == SLAPD_ABANDON
1179                                 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1180                 }
1181
1182                 do {
1183                         /* Fake a cond_wait with thread_yield, then
1184                          * verify the result properly mutex-protected.
1185                          */
1186                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1187                         do {
1188                                 ldap_pvt_thread_yield();
1189                         } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1190                                         && cancel != SLAP_CANCEL_DONE );
1191                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1192                 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1193                                 && cancel != SLAP_CANCEL_DONE );
1194         }
1195
1196         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1197
1198         LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1199         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1200         conn->c_n_ops_executing--;
1201         conn->c_n_ops_completed++;
1202
1203         switch( tag ) {
1204         case LBER_ERROR:
1205         case LDAP_REQ_UNBIND:
1206                 /* c_mutex is locked */
1207                 connection_closing( conn,
1208                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1209                 break;
1210         }
1211
1212         connection_resched( conn );
1213         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1214         slap_op_free( op, ctx );
1215         return NULL;
1216 }
1217
1218 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1219
1220 Connection *connection_client_setup(
1221         ber_socket_t s,
1222         ldap_pvt_thread_start_t *func,
1223         void *arg )
1224 {
1225         Connection *c;
1226         ber_socket_t sfd = SLAP_SOCKNEW( s );
1227
1228         c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1229                 CONN_IS_CLIENT, 0, NULL
1230                 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1231         if ( c ) {
1232                 c->c_clientfunc = func;
1233                 c->c_clientarg = arg;
1234
1235                 slapd_add_internal( sfd, 0 );
1236         }
1237         return c;
1238 }
1239
1240 void connection_client_enable(
1241         Connection *c )
1242 {
1243         slapd_set_read( c->c_sd, 1 );
1244 }
1245
1246 void connection_client_stop(
1247         Connection *c )
1248 {
1249         Sockbuf *sb;
1250         ber_socket_t s = c->c_sd;
1251
1252         /* get (locked) connection */
1253         c = connection_get( s );
1254
1255         assert( c->c_conn_state == SLAP_C_CLIENT );
1256
1257         c->c_listener = NULL;
1258         c->c_conn_state = SLAP_C_INVALID;
1259         c->c_struct_state = SLAP_C_UNUSED;
1260         c->c_sd = AC_SOCKET_INVALID;
1261         c->c_close_reason = "?";                        /* should never be needed */
1262         sb = c->c_sb;
1263         c->c_sb = ber_sockbuf_alloc( );
1264         {
1265                 ber_len_t max = sockbuf_max_incoming;
1266                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1267         }
1268         slapd_remove( s, sb, 0, 1, 0 );
1269
1270         connection_return( c );
1271 }
1272
1273 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1274
1275 static void* connection_read_thread( void* ctx, void* argv )
1276 {
1277         int rc ;
1278         conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1279         ber_socket_t s = (long)argv;
1280
1281         /*
1282          * read incoming LDAP requests. If there is more than one,
1283          * the first one is returned with new_op
1284          */
1285         cri.ctx = ctx;
1286         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1287                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1288                 return (void*)(long)rc;
1289         }
1290
1291         /* execute a single queued request in the same thread */
1292         if( cri.op && !cri.nullop ) {
1293                 rc = (long)connection_operation( ctx, cri.op );
1294         } else if ( cri.func ) {
1295                 rc = (long)cri.func( ctx, cri.arg );
1296         }
1297
1298         return (void*)(long)rc;
1299 }
1300
1301 int connection_read_activate( ber_socket_t s )
1302 {
1303         int rc;
1304
1305         /*
1306          * suspend reading on this file descriptor until a connection processing
1307          * thread reads data on it. Otherwise the listener thread will repeatedly
1308          * submit the same event on it to the pool.
1309          */
1310         rc = slapd_clr_read( s, 0 );
1311         if ( rc )
1312                 return rc;
1313
1314         /* Don't let blocked writers block a pause request */
1315         if ( connections[s].c_writewaiter &&
1316                 ldap_pvt_thread_pool_pausing( &connection_pool ))
1317                 connection_wake_writers( &connections[s] );
1318
1319         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1320                 connection_read_thread, (void *)(long)s );
1321
1322         if( rc != 0 ) {
1323                 Debug( LDAP_DEBUG_ANY,
1324                         "connection_read_activate(%d): submit failed (%d)\n",
1325                         s, rc, 0 );
1326         }
1327
1328         return rc;
1329 }
1330
1331 static int
1332 connection_read( ber_socket_t s, conn_readinfo *cri )
1333 {
1334         int rc = 0;
1335         Connection *c;
1336
1337         assert( connections != NULL );
1338
1339         /* get (locked) connection */
1340         c = connection_get( s );
1341
1342         if( c == NULL ) {
1343                 Debug( LDAP_DEBUG_ANY,
1344                         "connection_read(%ld): no connection!\n",
1345                         (long) s, 0, 0 );
1346
1347                 return -1;
1348         }
1349
1350         c->c_n_read++;
1351
1352         if( c->c_conn_state == SLAP_C_CLOSING ) {
1353                 Debug( LDAP_DEBUG_CONNS,
1354                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1355                         s, c->c_connid, 0 );
1356                 connection_return( c );
1357                 return 0;
1358         }
1359
1360         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1361                 cri->func = c->c_clientfunc;
1362                 cri->arg = c->c_clientarg;
1363                 /* read should already be cleared */
1364                 connection_return( c );
1365                 return 0;
1366         }
1367
1368         Debug( LDAP_DEBUG_TRACE,
1369                 "connection_read(%d): checking for input on id=%lu\n",
1370                 s, c->c_connid, 0 );
1371
1372 #ifdef HAVE_TLS
1373         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1374                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1375                 if ( rc < 0 ) {
1376                         Debug( LDAP_DEBUG_TRACE,
1377                                 "connection_read(%d): TLS accept failure "
1378                                 "error=%d id=%lu, closing\n",
1379                                 s, rc, c->c_connid );
1380
1381                         c->c_needs_tls_accept = 0;
1382                         /* c_mutex is locked */
1383                         connection_closing( c, "TLS negotiation failure" );
1384                         connection_close( c );
1385                         connection_return( c );
1386                         return 0;
1387
1388                 } else if ( rc == 0 ) {
1389                         void *ssl;
1390                         struct berval authid = BER_BVNULL;
1391                         char msgbuf[32];
1392
1393                         c->c_needs_tls_accept = 0;
1394
1395                         /* we need to let SASL know */
1396                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1397
1398                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1399                         if( c->c_tls_ssf > c->c_ssf ) {
1400                                 c->c_ssf = c->c_tls_ssf;
1401                         }
1402
1403                         rc = dnX509peerNormalize( ssl, &authid );
1404                         if ( rc != LDAP_SUCCESS ) {
1405                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1406                                         "unable to get TLS client DN, error=%d id=%lu\n",
1407                                         s, rc, c->c_connid );
1408                         }
1409                         sprintf(msgbuf, "tls_ssf=%u ssf=%u", c->c_tls_ssf, c->c_ssf);
1410                         Statslog( LDAP_DEBUG_STATS,
1411                                 "conn=%lu fd=%d TLS established %s tls_proto=%s tls_cipher=%s\n",
1412                             c->c_connid, (int) s,
1413                                 msgbuf, ldap_pvt_tls_get_version( ssl ), ldap_pvt_tls_get_cipher( ssl ));
1414                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1415                         if ( authid.bv_val ) free( authid.bv_val );
1416                         {
1417                                 char cbinding[64];
1418                                 struct berval cbv = { sizeof(cbinding), cbinding };
1419                                 if ( ldap_pvt_tls_get_unique( ssl, &cbv, 1 ))
1420                                         slap_sasl_cbinding( c, &cbv );
1421                         }
1422                 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1423                         LBER_SB_OPT_NEEDS_WRITE, NULL )) {      /* need to retry */
1424                         slapd_set_write( s, 1 );
1425                         connection_return( c );
1426                         return 0;
1427                 }
1428
1429                 /* if success and data is ready, fall thru to data input loop */
1430                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1431                 {
1432                         slapd_set_read( s, 1 );
1433                         connection_return( c );
1434                         return 0;
1435                 }
1436         }
1437 #endif
1438
1439 #ifdef HAVE_CYRUS_SASL
1440         if ( c->c_sasl_layers ) {
1441                 /* If previous layer is not removed yet, give up for now */
1442                 if ( !c->c_sasl_sockctx ) {
1443                         slapd_set_read( s, 1 );
1444                         connection_return( c );
1445                         return 0;
1446                 }
1447
1448                 c->c_sasl_layers = 0;
1449
1450                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1451                 if( rc != LDAP_SUCCESS ) {
1452                         Debug( LDAP_DEBUG_TRACE,
1453                                 "connection_read(%d): SASL install error "
1454                                 "error=%d id=%lu, closing\n",
1455                                 s, rc, c->c_connid );
1456
1457                         /* c_mutex is locked */
1458                         connection_closing( c, "SASL layer install failure" );
1459                         connection_close( c );
1460                         connection_return( c );
1461                         return 0;
1462                 }
1463         }
1464 #endif
1465
1466 #define CONNECTION_INPUT_LOOP 1
1467 /* #define      DATA_READY_LOOP 1 */
1468
1469         do {
1470                 /* How do we do this without getting into a busy loop ? */
1471                 rc = connection_input( c, cri );
1472         }
1473 #ifdef DATA_READY_LOOP
1474         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1475 #elif defined CONNECTION_INPUT_LOOP
1476         while(!rc);
1477 #else
1478         while(0);
1479 #endif
1480
1481         if( rc < 0 ) {
1482                 Debug( LDAP_DEBUG_CONNS,
1483                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1484                         s, rc, c->c_connid );
1485
1486                 /* c_mutex is locked */
1487                 connection_closing( c, conn_lost_str );
1488                 connection_close( c );
1489                 connection_return( c );
1490                 return 0;
1491         }
1492
1493         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1494                 slapd_set_write( s, 0 );
1495         }
1496
1497         slapd_set_read( s, 1 );
1498         connection_return( c );
1499
1500         return 0;
1501 }
1502
1503 static int
1504 connection_input( Connection *conn , conn_readinfo *cri )
1505 {
1506         Operation *op;
1507         ber_tag_t       tag;
1508         ber_len_t       len;
1509         ber_int_t       msgid;
1510         BerElement      *ber;
1511         int             rc;
1512 #ifdef LDAP_CONNECTIONLESS
1513         Sockaddr        peeraddr;
1514         char            *cdn = NULL;
1515 #endif
1516         char *defer = NULL;
1517         void *ctx;
1518
1519         if ( conn->c_currentber == NULL &&
1520                 ( conn->c_currentber = ber_alloc()) == NULL )
1521         {
1522                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1523                 return -1;
1524         }
1525
1526         sock_errset(0);
1527
1528 #ifdef LDAP_CONNECTIONLESS
1529         if ( conn->c_is_udp ) {
1530                 char peername[sizeof("IP=255.255.255.255:65336")];
1531                 const char *peeraddr_string = NULL;
1532
1533                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1534                 if (len != sizeof(struct sockaddr)) return 1;
1535
1536 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1537                 char addr[INET_ADDRSTRLEN];
1538                 peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1539                            addr, sizeof(addr) );
1540 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1541                 peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1542 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1543                 sprintf( peername, "IP=%s:%d",
1544                          peeraddr_string,
1545                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1546                 Statslog( LDAP_DEBUG_STATS,
1547                         "conn=%lu UDP request from %s (%s) accepted.\n",
1548                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1549         }
1550 #endif
1551
1552         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1553         if ( tag != LDAP_TAG_MESSAGE ) {
1554                 int err = sock_errno();
1555
1556                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1557                         /* log, close and send error */
1558                         Debug( LDAP_DEBUG_TRACE,
1559                                 "ber_get_next on fd %d failed errno=%d (%s)\n",
1560                         conn->c_sd, err, sock_errstr(err) );
1561                         ber_free( conn->c_currentber, 1 );
1562                         conn->c_currentber = NULL;
1563
1564                         return -2;
1565                 }
1566                 return 1;
1567         }
1568
1569         ber = conn->c_currentber;
1570         conn->c_currentber = NULL;
1571
1572         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1573                 /* log, close and send error */
1574                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1575                 ber_free( ber, 1 );
1576                 return -1;
1577         }
1578
1579         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1580                 /* log, close and send error */
1581                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1582                 ber_free( ber, 1 );
1583
1584                 return -1;
1585         }
1586
1587 #ifdef LDAP_CONNECTIONLESS
1588         if( conn->c_is_udp ) {
1589                 if( tag == LBER_OCTETSTRING ) {
1590                         if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1591                                 tag = ber_peek_tag( ber, &len );
1592                 }
1593                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1594                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1595                         ber_free( ber, 1 );
1596                         return 0;
1597                 }
1598         }
1599 #endif
1600
1601         if(tag == LDAP_REQ_BIND) {
1602                 /* immediately abandon all existing operations upon BIND */
1603                 connection_abandon( conn );
1604         }
1605
1606         ctx = cri->ctx;
1607         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1608
1609         Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1610                 (long) op->o_time, 0);
1611
1612         op->o_conn = conn;
1613         /* clear state if the connection is being reused from inactive */
1614         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1615                 memset( &conn->c_pagedresults_state, 0,
1616                         sizeof( conn->c_pagedresults_state ) );
1617         }
1618
1619         op->o_res_ber = NULL;
1620
1621 #ifdef LDAP_CONNECTIONLESS
1622         if (conn->c_is_udp) {
1623                 if ( cdn ) {
1624                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1625                         op->o_protocol = LDAP_VERSION2;
1626                 }
1627                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1628                 if (op->o_res_ber == NULL) return 1;
1629
1630                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1631                         sizeof(struct sockaddr), 0 );
1632
1633                 if (rc != sizeof(struct sockaddr)) {
1634                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1635                         return 1;
1636                 }
1637
1638                 if (op->o_protocol == LDAP_VERSION2) {
1639                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1640                         if (rc == -1) {
1641                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1642                                 return rc;
1643                         }
1644                 }
1645         }
1646 #endif /* LDAP_CONNECTIONLESS */
1647
1648         rc = 0;
1649
1650         /* Don't process requests when the conn is in the middle of a
1651          * Bind, or if it's closing. Also, don't let any single conn
1652          * use up all the available threads, and don't execute if we're
1653          * currently blocked on output. And don't execute if there are
1654          * already pending ops, let them go first.  Abandon operations
1655          * get exceptions to some, but not all, cases.
1656          */
1657         switch( tag ){
1658         default:
1659                 /* Abandon and Unbind are exempt from these checks */
1660                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1661                         defer = "closing";
1662                         break;
1663                 } else if (conn->c_writewaiter) {
1664                         defer = "awaiting write";
1665                         break;
1666                 } else if (conn->c_n_ops_pending) {
1667                         defer = "pending operations";
1668                         break;
1669                 }
1670                 /* FALLTHRU */
1671         case LDAP_REQ_ABANDON:
1672                 /* Unbind is exempt from these checks */
1673                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1674                         defer = "too many executing";
1675                         break;
1676                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1677                         defer = "binding";
1678                         break;
1679                 }
1680                 /* FALLTHRU */
1681         case LDAP_REQ_UNBIND:
1682                 break;
1683         }
1684
1685         if( defer ) {
1686                 int max = conn->c_dn.bv_len
1687                         ? slap_conn_max_pending_auth
1688                         : slap_conn_max_pending;
1689
1690                 Debug( LDAP_DEBUG_ANY,
1691                         "connection_input: conn=%lu deferring operation: %s\n",
1692                         conn->c_connid, defer, 0 );
1693                 conn->c_n_ops_pending++;
1694                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1695                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1696
1697         } else {
1698                 conn->c_n_ops_executing++;
1699
1700                 /*
1701                  * The first op will be processed in the same thread context,
1702                  * as long as there is only one op total.
1703                  * Subsequent ops will be submitted to the pool by
1704                  * calling connection_op_activate()
1705                  */
1706                 if ( cri->op == NULL ) {
1707                         /* the first incoming request */
1708                         connection_op_queue( op );
1709                         cri->op = op;
1710                 } else {
1711                         if ( !cri->nullop ) {
1712                                 cri->nullop = 1;
1713                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1714                                         connection_operation, (void *) cri->op );
1715                         }
1716                         connection_op_activate( op );
1717                 }
1718         }
1719
1720 #ifdef NO_THREADS
1721         if ( conn->c_struct_state != SLAP_C_USED ) {
1722                 /* connection must have got closed underneath us */
1723                 return 1;
1724         }
1725 #endif
1726
1727         assert( conn->c_struct_state == SLAP_C_USED );
1728         return rc;
1729 }
1730
1731 static int
1732 connection_resched( Connection *conn )
1733 {
1734         Operation *op;
1735
1736         if( conn->c_writewaiter )
1737                 return 0;
1738
1739         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1740                 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1741                         "attempting closing conn=%lu sd=%d\n",
1742                         conn->c_connid, conn->c_sd, 0 );
1743                 connection_close( conn );
1744                 return 0;
1745         }
1746
1747         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1748                 /* other states need different handling */
1749                 return 0;
1750         }
1751
1752         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1753                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1754
1755                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1756                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1757
1758                 /* pending operations should not be marked for abandonment */
1759                 assert(!op->o_abandon);
1760
1761                 conn->c_n_ops_pending--;
1762                 conn->c_n_ops_executing++;
1763
1764                 connection_op_activate( op );
1765
1766                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1767         }
1768         return 0;
1769 }
1770
1771 static void
1772 connection_init_log_prefix( Operation *op )
1773 {
1774         if ( op->o_connid == (unsigned long)(-1) ) {
1775                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1776                         "conn=-1 op=%lu", op->o_opid );
1777
1778         } else {
1779                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1780                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1781         }
1782 }
1783
1784 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1785 {
1786         op->o_conn->c_sasl_bindop = NULL;
1787
1788         ch_free( op->o_callback );
1789         op->o_callback = NULL;
1790
1791         return SLAP_CB_CONTINUE;
1792 }
1793
1794 static int connection_bind_cb( Operation *op, SlapReply *rs )
1795 {
1796         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1797         op->o_conn->c_sasl_bind_in_progress =
1798                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1799
1800         /* Moved here from bind.c due to ITS#4158 */
1801         op->o_conn->c_sasl_bindop = NULL;
1802         if ( op->orb_method == LDAP_AUTH_SASL ) {
1803                 if( rs->sr_err == LDAP_SUCCESS ) {
1804                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1805                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1806                                 /* edn is always normalized already */
1807                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1808                         }
1809                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1810                         BER_BVZERO( &op->orb_edn );
1811                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1812                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1813
1814                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1815                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1816                                 op->o_conn->c_ssf = op->orb_ssf;
1817                         }
1818
1819                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1820                                 ber_len_t max = sockbuf_max_incoming_auth;
1821                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1822                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1823                         }
1824
1825                         /* log authorization identity */
1826                         Statslog( LDAP_DEBUG_STATS,
1827                                 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1828                                 op->o_log_prefix,
1829                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1830                                 op->o_conn->c_authmech.bv_val,
1831                                 op->orb_ssf, op->o_conn->c_ssf );
1832
1833                         Debug( LDAP_DEBUG_TRACE,
1834                                 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1835                                 op->o_conn->c_authmech.bv_val,
1836                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1837                                 op->orb_ssf );
1838
1839                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1840                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1841                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1842                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1843                         }
1844                 }
1845         }
1846         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1847
1848         ch_free( op->o_callback );
1849         op->o_callback = NULL;
1850
1851         return SLAP_CB_CONTINUE;
1852 }
1853
1854 static void connection_op_queue( Operation *op )
1855 {
1856         ber_tag_t tag = op->o_tag;
1857
1858         if (tag == LDAP_REQ_BIND) {
1859                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1860                 sc->sc_response = connection_bind_cb;
1861                 sc->sc_cleanup = connection_bind_cleanup_cb;
1862                 sc->sc_next = op->o_callback;
1863                 op->o_callback = sc;
1864                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1865         }
1866
1867         if (!op->o_dn.bv_len) {
1868                 op->o_authz = op->o_conn->c_authz;
1869                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1870                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1871                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1872                 } else {
1873                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1874                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1875                 }
1876         }
1877
1878         op->o_authtype = op->o_conn->c_authtype;
1879         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1880
1881         if (!op->o_protocol) {
1882                 op->o_protocol = op->o_conn->c_protocol
1883                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1884         }
1885
1886         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1887                 op->o_protocol > LDAP_VERSION2)
1888         {
1889                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1890         }
1891
1892         op->o_connid = op->o_conn->c_connid;
1893         connection_init_log_prefix( op );
1894
1895         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1896 }
1897
1898 static int connection_op_activate( Operation *op )
1899 {
1900         int rc;
1901
1902         connection_op_queue( op );
1903
1904         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1905                 connection_operation, (void *) op );
1906
1907         if ( rc != 0 ) {
1908                 Debug( LDAP_DEBUG_ANY,
1909                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1910                         rc, op->o_connid, 0 );
1911                 /* should move op to pending list */
1912         }
1913
1914         return rc;
1915 }
1916
1917 int connection_write(ber_socket_t s)
1918 {
1919         Connection *c;
1920         Operation *op;
1921
1922         assert( connections != NULL );
1923
1924         c = connection_get( s );
1925         if( c == NULL ) {
1926                 Debug( LDAP_DEBUG_ANY,
1927                         "connection_write(%ld): no connection!\n",
1928                         (long)s, 0, 0 );
1929                 return -1;
1930         }
1931
1932         slapd_clr_write( s, 0 );
1933
1934 #ifdef HAVE_TLS
1935         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1936                 connection_return( c );
1937                 connection_read_activate( s );
1938                 return 0;
1939         }
1940 #endif
1941
1942         c->c_n_write++;
1943
1944         Debug( LDAP_DEBUG_TRACE,
1945                 "connection_write(%d): waking output for id=%lu\n",
1946                 s, c->c_connid, 0 );
1947         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1948         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1949         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1950
1951         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1952                 slapd_set_read( s, 1 );
1953         }
1954         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1955                 slapd_set_write( s, 1 );
1956         }
1957
1958         /* If there are ops pending because of a writewaiter,
1959          * start one up.
1960          */
1961         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1962                 if ( !c->c_writewaiter ) break;
1963                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1964
1965                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1966                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1967
1968                 /* pending operations should not be marked for abandonment */
1969                 assert(!op->o_abandon);
1970
1971                 c->c_n_ops_pending--;
1972                 c->c_n_ops_executing++;
1973
1974                 connection_op_activate( op );
1975
1976                 break;
1977         }
1978
1979         connection_return( c );
1980         return 0;
1981 }
1982
1983 #ifdef LDAP_SLAPI
1984 typedef struct conn_fake_extblock {
1985         void *eb_conn;
1986         void *eb_op;
1987 } conn_fake_extblock;
1988
1989 static void
1990 connection_fake_destroy(
1991         void *key,
1992         void *data )
1993 {
1994         Connection conn = {0};
1995         Operation op = {0};
1996         Opheader ohdr = {0};
1997
1998         conn_fake_extblock *eb = data;
1999
2000         op.o_hdr = &ohdr;
2001         op.o_hdr->oh_extensions = eb->eb_op;
2002         conn.c_extensions = eb->eb_conn;
2003         op.o_conn = &conn;
2004         conn.c_connid = -1;
2005         op.o_connid = -1;
2006
2007         ber_memfree_x( eb, NULL );
2008         slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
2009         slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
2010 }
2011 #endif
2012
2013 void
2014 connection_fake_init(
2015         Connection *conn,
2016         OperationBuffer *opbuf,
2017         void *ctx )
2018 {
2019         connection_fake_init2( conn, opbuf, ctx, 1 );
2020 }
2021
2022 void
2023 operation_fake_init(
2024         Connection *conn,
2025         Operation *op,
2026         void *ctx,
2027         int newmem )
2028 {
2029         /* set memory context */
2030         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2031                 newmem );
2032         op->o_tmpmfuncs = &slap_sl_mfuncs;
2033         op->o_threadctx = ctx;
2034         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2035
2036         op->o_counters = &slap_counters;
2037         op->o_conn = conn;
2038         op->o_connid = op->o_conn->c_connid;
2039         connection_init_log_prefix( op );
2040 }
2041
2042
2043 void
2044 connection_fake_init2(
2045         Connection *conn,
2046         OperationBuffer *opbuf,
2047         void *ctx,
2048         int newmem )
2049 {
2050         Operation *op = (Operation *) opbuf;
2051
2052         conn->c_connid = -1;
2053         conn->c_conn_idx = -1;
2054         conn->c_send_ldap_result = slap_send_ldap_result;
2055         conn->c_send_search_entry = slap_send_search_entry;
2056         conn->c_send_search_reference = slap_send_search_reference;
2057         conn->c_send_ldap_extended = slap_send_ldap_extended;
2058         conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2059         conn->c_listener = (Listener *)&dummy_list;
2060         conn->c_peer_domain = slap_empty_bv;
2061         conn->c_peer_name = slap_empty_bv;
2062
2063         memset( opbuf, 0, sizeof( *opbuf ));
2064         op->o_hdr = &opbuf->ob_hdr;
2065         op->o_controls = opbuf->ob_controls;
2066
2067         operation_fake_init( conn, op, ctx, newmem );
2068
2069 #ifdef LDAP_SLAPI
2070         if ( slapi_plugins_used ) {
2071                 conn_fake_extblock *eb;
2072                 void *ebx = NULL;
2073
2074                 /* Use thread keys to make sure these eventually get cleaned up */
2075                 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2076                                 &ebx, NULL )) {
2077                         eb = ch_malloc( sizeof( *eb ));
2078                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2079                         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2080                         eb->eb_conn = conn->c_extensions;
2081                         eb->eb_op = op->o_hdr->oh_extensions;
2082                         ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2083                                 eb, connection_fake_destroy, NULL, NULL );
2084                 } else {
2085                         eb = ebx;
2086                         conn->c_extensions = eb->eb_conn;
2087                         op->o_hdr->oh_extensions = eb->eb_op;
2088                 }
2089         }
2090 #endif /* LDAP_SLAPI */
2091
2092         slap_op_time( &op->o_time, &op->o_tincr );
2093 }
2094
2095 void
2096 connection_assign_nextid( Connection *conn )
2097 {
2098         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2099         conn->c_connid = conn_nextid++;
2100         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2101 }