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 1998-2016 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
 410                 c->c_sb = ber_sockbuf_alloc( );
 411
 412                 {
 413                         ber_len_t max = sockbuf_max_incoming;
 414                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 415                 }
 416
 417                 c->c_currentber = NULL;
 418
 419                 /* should check status of thread calls */
 420                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 421                 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
 422                 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
 423                 ldap_pvt_thread_cond_init( &c->c_write1_cv );
 424                 ldap_pvt_thread_cond_init( &c->c_write2_cv );
 425
 426 #ifdef LDAP_SLAPI
 427                 if ( slapi_plugins_used ) {
 428                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 429                 }
 430 #endif
 431         }
 432
 433         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 434
 435         assert( BER_BVISNULL( &c->c_authmech ) );
 436         assert( BER_BVISNULL( &c->c_dn ) );
 437         assert( BER_BVISNULL( &c->c_ndn ) );
 438         assert( c->c_listener == NULL );
 439         assert( BER_BVISNULL( &c->c_peer_domain ) );
 440         assert( BER_BVISNULL( &c->c_peer_name ) );
 441         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 442         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 443 #ifdef LDAP_X_TXN
 444         assert( c->c_txn == CONN_TXN_INACTIVE );
 445         assert( c->c_txn_backend == NULL );
 446         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 447 #endif
 448         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 449         assert( c->c_sasl_done == 0 );
 450         assert( c->c_sasl_authctx == NULL );
 451         assert( c->c_sasl_sockctx == NULL );
 452         assert( c->c_sasl_extra == NULL );
 453         assert( c->c_sasl_bindop == NULL );
 454         assert( c->c_currentber == NULL );
 455         assert( c->c_writewaiter == 0);
 456         assert( c->c_writers == 0);
 457
 458         c->c_listener = listener;
 459         c->c_sd = s;
 460
 461         if ( flags & CONN_IS_CLIENT ) {
 462                 c->c_connid = 0;
 463                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 464                 c->c_conn_state = SLAP_C_CLIENT;
 465                 c->c_struct_state = SLAP_C_USED;
 466                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 467                 c->c_close_reason = "?";                        /* should never be needed */
 468                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
 469                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 470
 471                 return c;
 472         }
 473
 474         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 475         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 476
 477         c->c_n_ops_received = 0;
 478         c->c_n_ops_executing = 0;
 479         c->c_n_ops_pending = 0;
 480         c->c_n_ops_completed = 0;
 481
 482         c->c_n_get = 0;
 483         c->c_n_read = 0;
 484         c->c_n_write = 0;
 485
 486         /* set to zero until bind, implies LDAP_VERSION3 */
 487         c->c_protocol = 0;
 488
 489 #ifndef SLAPD_MONITOR
 490         if ( global_idletimeout > 0 )
 491 #endif /* ! SLAPD_MONITOR */
 492         {
 493                 c->c_activitytime = c->c_starttime = slap_get_time();
 494         }
 495
 496 #ifdef LDAP_CONNECTIONLESS
 497         c->c_is_udp = 0;
 498         if( flags & CONN_IS_UDP ) {
 499                 c->c_is_udp = 1;
 500 #ifdef LDAP_DEBUG
 501                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 502                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 503 #endif
 504                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 505                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 506                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 507                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 508         } else
 509 #endif /* LDAP_CONNECTIONLESS */
 510 #ifdef LDAP_PF_LOCAL
 511         if ( flags & CONN_IS_IPC ) {
 512 #ifdef LDAP_DEBUG
 513                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 514                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 515 #endif
 516                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
 517                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 518 #ifdef LDAP_PF_LOCAL_SENDMSG
 519                 if ( !BER_BVISEMPTY( peerbv ))
 520                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
 521 #endif
 522         } else
 523 #endif /* LDAP_PF_LOCAL */
 524         {
 525 #ifdef LDAP_DEBUG
 526                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 527                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 528 #endif
 529                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 530                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
 531         }
 532
 533 #ifdef LDAP_DEBUG
 534         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 535                 INT_MAX, (void*)"ldap_" );
 536 #endif
 537
 538         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 539                 c /* non-NULL */ ) < 0 )
 540         {
 541                 Debug( LDAP_DEBUG_ANY,
 542                         "connection_init(%d, %s): set nonblocking failed\n",
 543                         s, c->c_peer_name.bv_val, 0 );
 544         }
 545
 546         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 547         id = c->c_connid = conn_nextid++;
 548         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 549
 550         ldap_pvt_thread_mutex_lock( &connections_mutex );
 551         c->c_conn_state = SLAP_C_INACTIVE;
 552         c->c_struct_state = SLAP_C_USED;
 553         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 554         c->c_close_reason = "?";                        /* should never be needed */
 555
 556         c->c_ssf = c->c_transport_ssf = ssf;
 557         c->c_tls_ssf = 0;
 558
 559 #ifdef HAVE_TLS
 560         if ( flags & CONN_IS_TLS ) {
 561                 c->c_is_tls = 1;
 562                 c->c_needs_tls_accept = 1;
 563         } else {
 564                 c->c_is_tls = 0;
 565                 c->c_needs_tls_accept = 0;
 566         }
 567 #endif
 568
 569         slap_sasl_open( c, 0 );
 570         slap_sasl_external( c, ssf, authid );
 571
 572         slapd_add_internal( s, 1 );
 573
 574         backend_connection_init(c);
 575         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 576
 577         if ( !(flags & CONN_IS_UDP ))
 578                 Statslog( LDAP_DEBUG_STATS,
 579                         "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
 580                         id, (long) s, peername, listener->sl_name.bv_val, 0 );
 581
 582         return c;
 583 }
 584
 585 void connection2anonymous( Connection *c )
 586 {
 587         assert( connections != NULL );
 588         assert( c != NULL );
 589
 590         {
 591                 ber_len_t max = sockbuf_max_incoming;
 592                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 593         }
 594
 595         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 596                 ch_free(c->c_authmech.bv_val);
 597         }
 598         BER_BVZERO( &c->c_authmech );
 599
 600         if ( !BER_BVISNULL( &c->c_dn ) ) {
 601                 ch_free(c->c_dn.bv_val);
 602         }
 603         BER_BVZERO( &c->c_dn );
 604
 605         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 606                 ch_free(c->c_ndn.bv_val);
 607         }
 608         BER_BVZERO( &c->c_ndn );
 609
 610         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 611                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 612         }
 613         BER_BVZERO( &c->c_sasl_authz_dn );
 614
 615         c->c_authz_backend = NULL;
 616 }
 617
 618 static void
 619 connection_destroy( Connection *c )
 620 {
 621         unsigned long   connid;
 622         const char              *close_reason;
 623         Sockbuf                 *sb;
 624         ber_socket_t    sd;
 625
 626         assert( connections != NULL );
 627         assert( c != NULL );
 628         assert( c->c_struct_state != SLAP_C_UNUSED );
 629         assert( c->c_conn_state != SLAP_C_INVALID );
 630         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 631         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 632 #ifdef LDAP_X_TXN
 633         assert( c->c_txn == CONN_TXN_INACTIVE );
 634         assert( c->c_txn_backend == NULL );
 635         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 636 #endif
 637         assert( c->c_writewaiter == 0);
 638         assert( c->c_writers == 0);
 639
 640         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 641         connid = c->c_connid;
 642         close_reason = c->c_close_reason;
 643
 644         ldap_pvt_thread_mutex_lock( &connections_mutex );
 645         c->c_struct_state = SLAP_C_PENDING;
 646         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 647
 648         backend_connection_destroy(c);
 649
 650         c->c_protocol = 0;
 651         c->c_connid = -1;
 652
 653         c->c_activitytime = c->c_starttime = 0;
 654
 655         connection2anonymous( c );
 656         c->c_listener = NULL;
 657
 658         if(c->c_peer_domain.bv_val != NULL) {
 659                 free(c->c_peer_domain.bv_val);
 660         }
 661         BER_BVZERO( &c->c_peer_domain );
 662         if(c->c_peer_name.bv_val != NULL) {
 663                 free(c->c_peer_name.bv_val);
 664         }
 665         BER_BVZERO( &c->c_peer_name );
 666
 667         c->c_sasl_bind_in_progress = 0;
 668         if(c->c_sasl_bind_mech.bv_val != NULL) {
 669                 free(c->c_sasl_bind_mech.bv_val);
 670         }
 671         BER_BVZERO( &c->c_sasl_bind_mech );
 672
 673         slap_sasl_close( c );
 674
 675         if ( c->c_currentber != NULL ) {
 676                 ber_free( c->c_currentber, 1 );
 677                 c->c_currentber = NULL;
 678         }
 679
 680
 681 #ifdef LDAP_SLAPI
 682         /* call destructors, then constructors; avoids unnecessary allocation */
 683         if ( slapi_plugins_used ) {
 684                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 685         }
 686 #endif
 687
 688         sd = c->c_sd;
 689         c->c_sd = AC_SOCKET_INVALID;
 690         c->c_conn_state = SLAP_C_INVALID;
 691         c->c_struct_state = SLAP_C_UNUSED;
 692         c->c_close_reason = "?";                        /* should never be needed */
 693
 694         sb = c->c_sb;
 695         c->c_sb = ber_sockbuf_alloc( );
 696         {
 697                 ber_len_t max = sockbuf_max_incoming;
 698                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 699         }
 700
 701         /* c must be fully reset by this point; when we call slapd_remove
 702          * it may get immediately reused by a new connection.
 703          */
 704         if ( sd != AC_SOCKET_INVALID ) {
 705                 slapd_remove( sd, sb, 1, 0, 0 );
 706
 707                 if ( close_reason == NULL ) {
 708                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
 709                                 connid, (long) sd, 0, 0, 0 );
 710                 } else {
 711                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
 712                                 connid, (long) sd, close_reason, 0, 0 );
 713                 }
 714         }
 715 }
 716
 717 int connection_valid( Connection *c )
 718 {
 719         /* c_mutex must be locked by caller */
 720
 721         assert( c != NULL );
 722
 723         return c->c_struct_state == SLAP_C_USED &&
 724                 c->c_conn_state >= SLAP_C_ACTIVE &&
 725                 c->c_conn_state <= SLAP_C_CLIENT;
 726 }
 727
 728 static void connection_abandon( Connection *c )
 729 {
 730         /* c_mutex must be locked by caller */
 731
 732         Operation *o, *next, op = {0};
 733         Opheader ohdr = {0};
 734
 735         op.o_hdr = &ohdr;
 736         op.o_conn = c;
 737         op.o_connid = c->c_connid;
 738         op.o_tag = LDAP_REQ_ABANDON;
 739
 740         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 741                 SlapReply rs = {REP_RESULT};
 742
 743                 next = LDAP_STAILQ_NEXT( o, o_next );
 744                 /* don't abandon an op twice */
 745                 if ( o->o_abandon )
 746                         continue;
 747                 op.orn_msgid = o->o_msgid;
 748                 o->o_abandon = 1;
 749                 op.o_bd = frontendDB;
 750                 frontendDB->be_abandon( &op, &rs );
 751         }
 752
 753 #ifdef LDAP_X_TXN
 754         /* remove operations in pending transaction */
 755         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 756                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 757                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 758                 slap_op_free( o, NULL );
 759         }
 760
 761         /* clear transaction */
 762         c->c_txn_backend = NULL;
 763         c->c_txn = CONN_TXN_INACTIVE;
 764 #endif
 765
 766         /* remove pending operations */
 767         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 768                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 769                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 770                 slap_op_free( o, NULL );
 771         }
 772 }
 773
 774 static void
 775 connection_wake_writers( Connection *c )
 776 {
 777         /* wake write blocked operations */
 778         ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 779         if ( c->c_writers > 0 ) {
 780                 c->c_writers = -c->c_writers;
 781                 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
 782                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 783                 if ( c->c_writewaiter ) {
 784                         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
 785                         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
 786                         slapd_clr_write( c->c_sd, 1 );
 787                         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
 788                 }
 789                 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
 790                 while ( c->c_writers ) {
 791                         ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
 792                 }
 793                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 794         } else {
 795                 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
 796                 slapd_clr_write( c->c_sd, 1 );
 797         }
 798 }
 799
 800 void connection_closing( Connection *c, const char *why )
 801 {
 802         assert( connections != NULL );
 803         assert( c != NULL );
 804
 805         if ( c->c_struct_state != SLAP_C_USED ) return;
 806
 807         assert( c->c_conn_state != SLAP_C_INVALID );
 808
 809         /* c_mutex must be locked by caller */
 810
 811         if( c->c_conn_state != SLAP_C_CLOSING ) {
 812                 Debug( LDAP_DEBUG_CONNS,
 813                         "connection_closing: readying conn=%lu sd=%d for close\n",
 814                         c->c_connid, c->c_sd, 0 );
 815                 /* update state to closing */
 816                 c->c_conn_state = SLAP_C_CLOSING;
 817                 c->c_close_reason = why;
 818
 819                 /* don't listen on this port anymore */
 820                 slapd_clr_read( c->c_sd, 0 );
 821
 822                 /* abandon active operations */
 823                 connection_abandon( c );
 824
 825                 /* wake write blocked operations */
 826                 connection_wake_writers( c );
 827
 828         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 829                 /* Client closed connection after doing Unbind. */
 830                 c->c_close_reason = NULL;
 831         }
 832 }
 833
 834 static void
 835 connection_close( Connection *c )
 836 {
 837         assert( connections != NULL );
 838         assert( c != NULL );
 839
 840         if ( c->c_struct_state != SLAP_C_USED ) return;
 841
 842         assert( c->c_conn_state == SLAP_C_CLOSING );
 843
 844         /* NOTE: c_mutex should be locked by caller */
 845
 846         if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
 847                 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
 848         {
 849                 Debug( LDAP_DEBUG_CONNS,
 850                         "connection_close: deferring conn=%lu sd=%d\n",
 851                         c->c_connid, c->c_sd, 0 );
 852                 return;
 853         }
 854
 855         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 856                 c->c_connid, c->c_sd, 0 );
 857
 858         connection_destroy( c );
 859 }
 860
 861 unsigned long connections_nextid(void)
 862 {
 863         unsigned long id;
 864         assert( connections != NULL );
 865
 866         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 867
 868         id = conn_nextid;
 869
 870         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 871
 872         return id;
 873 }
 874
 875 /*
 876  * Loop through the connections:
 877  *
 878  *      for (c = connection_first(&i); c; c = connection_next(c, &i)) ...;
 879  *      connection_done(c);
 880  *
 881  * 'i' is the cursor, initialized by connection_first().
 882  * 'c_mutex' is locked in the returned connection.  The functions must
 883  * be passed the previous return value so they can unlock it again.
 884  */
 885
 886 Connection* connection_first( ber_socket_t *index )
 887 {
 888         assert( connections != NULL );
 889         assert( index != NULL );
 890
 891         ldap_pvt_thread_mutex_lock( &connections_mutex );
 892         for( *index = 0; *index < dtblsize; (*index)++) {
 893                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 894                         break;
 895                 }
 896         }
 897         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 898
 899         return connection_next(NULL, index);
 900 }
 901
 902 /* Next connection in loop, see connection_first() */
 903 Connection* connection_next( Connection *c, ber_socket_t *index )
 904 {
 905         assert( connections != NULL );
 906         assert( index != NULL );
 907         assert( *index <= dtblsize );
 908
 909         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 910
 911         c = NULL;
 912
 913         ldap_pvt_thread_mutex_lock( &connections_mutex );
 914         for(; *index < dtblsize; (*index)++) {
 915                 int c_struct;
 916                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 917                         /* FIXME: accessing c_conn_state without locking c_mutex */
 918                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 919                         continue;
 920                 }
 921
 922                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 923                         c = &connections[(*index)++];
 924                         if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 925                                 /* avoid deadlock */
 926                                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 927                                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 928                                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 929                                 if ( c->c_struct_state != SLAP_C_USED ) {
 930                                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 931                                         c = NULL;
 932                                         continue;
 933                                 }
 934                         }
 935                         assert( c->c_conn_state != SLAP_C_INVALID );
 936                         break;
 937                 }
 938
 939                 c_struct = connections[*index].c_struct_state;
 940                 if ( c_struct == SLAP_C_PENDING )
 941                         continue;
 942                 assert( c_struct == SLAP_C_UNUSED );
 943                 /* FIXME: accessing c_conn_state without locking c_mutex */
 944                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 945         }
 946
 947         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 948         return c;
 949 }
 950
 951 /* End connection loop, see connection_first() */
 952 void connection_done( Connection *c )
 953 {
 954         assert( connections != NULL );
 955
 956         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 957 }
 958
 959 /*
 960  * connection_activity - handle the request operation op on connection
 961  * conn.  This routine figures out what kind of operation it is and
 962  * calls the appropriate stub to handle it.
 963  */
 964
 965 #ifdef SLAPD_MONITOR
 966 /* FIXME: returns 0 in case of failure */
 967 #define INCR_OP_INITIATED(index) \
 968         do { \
 969                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 970                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
 971                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 972         } while (0)
 973 #define INCR_OP_COMPLETED(index) \
 974         do { \
 975                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 976                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 977                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
 978                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 979         } while (0)
 980 #else /* !SLAPD_MONITOR */
 981 #define INCR_OP_INITIATED(index) do { } while (0)
 982 #define INCR_OP_COMPLETED(index) \
 983         do { \
 984                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 985                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 986                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 987         } while (0)
 988 #endif /* !SLAPD_MONITOR */
 989
 990 /*
 991  * NOTE: keep in sync with enum in slapd.h
 992  */
 993 static BI_op_func *opfun[] = {
 994         do_bind,
 995         do_unbind,
 996         do_search,
 997         do_compare,
 998         do_modify,
 999         do_modrdn,
1000         do_add,
1001         do_delete,
1002         do_abandon,
1003         do_extended,
1004         NULL
1005 };
1006
1007 /* Counters are per-thread, not per-connection.
1008  */
1009 static void
1010 conn_counter_destroy( void *key, void *data )
1011 {
1012         slap_counters_t **prev, *sc;
1013
1014         ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1015         for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
1016                 prev = &sc->sc_next, sc = sc->sc_next ) {
1017                 if ( sc == data ) {
1018                         int i;
1019
1020                         *prev = sc->sc_next;
1021                         /* Copy data to main counter */
1022                         ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1023                         ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1024                         ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1025                         ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1026                         ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1027                         ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1028 #ifdef SLAPD_MONITOR
1029                         for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1030                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1031                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1032                         }
1033 #endif /* SLAPD_MONITOR */
1034                         slap_counters_destroy( sc );
1035                         ber_memfree_x( data, NULL );
1036                         break;
1037                 }
1038         }
1039         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1040 }
1041
1042 static void
1043 conn_counter_init( Operation *op, void *ctx )
1044 {
1045         slap_counters_t *sc;
1046         void *vsc = NULL;
1047
1048         if ( ldap_pvt_thread_pool_getkey(
1049                         ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1050                 vsc = ch_malloc( sizeof( slap_counters_t ));
1051                 sc = vsc;
1052                 slap_counters_init( sc );
1053                 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1054                         conn_counter_destroy, NULL, NULL );
1055
1056                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1057                 sc->sc_next = slap_counters.sc_next;
1058                 slap_counters.sc_next = sc;
1059                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1060         }
1061         op->o_counters = vsc;
1062 }
1063
1064 static void *
1065 connection_operation( void *ctx, void *arg_v )
1066 {
1067         int rc = LDAP_OTHER, cancel;
1068         Operation *op = arg_v;
1069         SlapReply rs = {REP_RESULT};
1070         ber_tag_t tag = op->o_tag;
1071         slap_op_t opidx = SLAP_OP_LAST;
1072         Connection *conn = op->o_conn;
1073         void *memctx = NULL;
1074         void *memctx_null = NULL;
1075         ber_len_t memsiz;
1076
1077         conn_counter_init( op, ctx );
1078         ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1079         /* FIXME: returns 0 in case of failure */
1080         ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1081         ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1082
1083         op->o_threadctx = ctx;
1084         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1085
1086         switch ( tag ) {
1087         case LDAP_REQ_BIND:
1088         case LDAP_REQ_UNBIND:
1089         case LDAP_REQ_ADD:
1090         case LDAP_REQ_DELETE:
1091         case LDAP_REQ_MODDN:
1092         case LDAP_REQ_MODIFY:
1093         case LDAP_REQ_COMPARE:
1094         case LDAP_REQ_SEARCH:
1095         case LDAP_REQ_ABANDON:
1096         case LDAP_REQ_EXTENDED:
1097                 break;
1098         default:
1099                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1100                         "conn %lu unknown LDAP request 0x%lx\n",
1101                         conn->c_connid, tag, 0 );
1102                 op->o_tag = LBER_ERROR;
1103                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1104                 rs.sr_text = "unknown LDAP request";
1105                 send_ldap_disconnect( op, &rs );
1106                 rc = SLAPD_DISCONNECT;
1107                 goto operations_error;
1108         }
1109
1110         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1111                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1112                         "error: SASL bind in progress (tag=%ld).\n",
1113                         (long) tag, 0, 0 );
1114                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1115                         "SASL bind in progress" );
1116                 rc = LDAP_OPERATIONS_ERROR;
1117                 goto operations_error;
1118         }
1119
1120 #ifdef LDAP_X_TXN
1121         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1122                 ( tag == LDAP_REQ_ADD ) ||
1123                 ( tag == LDAP_REQ_DELETE ) ||
1124                 ( tag == LDAP_REQ_MODIFY ) ||
1125                 ( tag == LDAP_REQ_MODRDN )))
1126         {
1127                 /* Disable SLAB allocator for all update operations
1128                         issued inside of a transaction */
1129                 op->o_tmpmemctx = NULL;
1130                 op->o_tmpmfuncs = &ch_mfuncs;
1131         } else
1132 #endif
1133         {
1134         /* We can use Thread-Local storage for most mallocs. We can
1135          * also use TL for ber parsing, but not on Add or Modify.
1136          */
1137 #if 0
1138         memsiz = ber_len( op->o_ber ) * 64;
1139         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1140 #endif
1141         memsiz = SLAP_SLAB_SIZE;
1142
1143         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1144         op->o_tmpmemctx = memctx;
1145         op->o_tmpmfuncs = &slap_sl_mfuncs;
1146         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1147                 /* Note - the ber and its buffer are already allocated from
1148                  * regular memory; this only affects subsequent mallocs that
1149                  * ber_scanf may invoke.
1150                  */
1151                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1152         }
1153         }
1154
1155         opidx = slap_req2op( tag );
1156         assert( opidx != SLAP_OP_LAST );
1157         INCR_OP_INITIATED( opidx );
1158         rc = (*(opfun[opidx]))( op, &rs );
1159
1160 operations_error:
1161         if ( rc == SLAPD_DISCONNECT ) {
1162                 tag = LBER_ERROR;
1163
1164         } else if ( opidx != SLAP_OP_LAST ) {
1165                 /* increment completed operations count
1166                  * only if operation was initiated
1167                  * and rc != SLAPD_DISCONNECT */
1168                 INCR_OP_COMPLETED( opidx );
1169         }
1170
1171         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1172
1173         if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1174                 conn->c_conn_state = SLAP_C_ACTIVE;
1175
1176         cancel = op->o_cancel;
1177         if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1178                 if ( cancel == SLAP_CANCEL_REQ ) {
1179                         op->o_cancel = rc == SLAPD_ABANDON
1180                                 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1181                 }
1182
1183                 do {
1184                         /* Fake a cond_wait with thread_yield, then
1185                          * verify the result properly mutex-protected.
1186                          */
1187                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1188                         do {
1189                                 ldap_pvt_thread_yield();
1190                         } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1191                                         && cancel != SLAP_CANCEL_DONE );
1192                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1193                 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1194                                 && cancel != SLAP_CANCEL_DONE );
1195         }
1196
1197         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1198
1199         LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1200         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1201         conn->c_n_ops_executing--;
1202         conn->c_n_ops_completed++;
1203
1204         switch( tag ) {
1205         case LBER_ERROR:
1206         case LDAP_REQ_UNBIND:
1207                 /* c_mutex is locked */
1208                 connection_closing( conn,
1209                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1210                 break;
1211         }
1212
1213         connection_resched( conn );
1214         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1215         slap_op_free( op, ctx );
1216         return NULL;
1217 }
1218
1219 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1220
1221 Connection *connection_client_setup(
1222         ber_socket_t s,
1223         ldap_pvt_thread_start_t *func,
1224         void *arg )
1225 {
1226         Connection *c;
1227         ber_socket_t sfd = SLAP_SOCKNEW( s );
1228
1229         c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1230                 CONN_IS_CLIENT, 0, NULL
1231                 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1232         if ( c ) {
1233                 c->c_clientfunc = func;
1234                 c->c_clientarg = arg;
1235
1236                 slapd_add_internal( sfd, 0 );
1237         }
1238         return c;
1239 }
1240
1241 void connection_client_enable(
1242         Connection *c )
1243 {
1244         slapd_set_read( c->c_sd, 1 );
1245 }
1246
1247 void connection_client_stop(
1248         Connection *c )
1249 {
1250         Sockbuf *sb;
1251         ber_socket_t s = c->c_sd;
1252
1253         /* get (locked) connection */
1254         c = connection_get( s );
1255
1256         assert( c->c_conn_state == SLAP_C_CLIENT );
1257
1258         c->c_listener = NULL;
1259         c->c_conn_state = SLAP_C_INVALID;
1260         c->c_struct_state = SLAP_C_UNUSED;
1261         c->c_sd = AC_SOCKET_INVALID;
1262         c->c_close_reason = "?";                        /* should never be needed */
1263         sb = c->c_sb;
1264         c->c_sb = ber_sockbuf_alloc( );
1265         {
1266                 ber_len_t max = sockbuf_max_incoming;
1267                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1268         }
1269         slapd_remove( s, sb, 0, 1, 0 );
1270
1271         connection_return( c );
1272 }
1273
1274 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1275
1276 static void* connection_read_thread( void* ctx, void* argv )
1277 {
1278         int rc ;
1279         conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1280         ber_socket_t s = (long)argv;
1281
1282         /*
1283          * read incoming LDAP requests. If there is more than one,
1284          * the first one is returned with new_op
1285          */
1286         cri.ctx = ctx;
1287         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1288                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1289                 return (void*)(long)rc;
1290         }
1291
1292         /* execute a single queued request in the same thread */
1293         if( cri.op && !cri.nullop ) {
1294                 rc = (long)connection_operation( ctx, cri.op );
1295         } else if ( cri.func ) {
1296                 rc = (long)cri.func( ctx, cri.arg );
1297         }
1298
1299         return (void*)(long)rc;
1300 }
1301
1302 int connection_read_activate( ber_socket_t s )
1303 {
1304         int rc;
1305
1306         /*
1307          * suspend reading on this file descriptor until a connection processing
1308          * thread reads data on it. Otherwise the listener thread will repeatedly
1309          * submit the same event on it to the pool.
1310          */
1311         rc = slapd_clr_read( s, 0 );
1312         if ( rc )
1313                 return rc;
1314
1315         /* Don't let blocked writers block a pause request */
1316         if ( connections[s].c_writewaiter &&
1317                 ldap_pvt_thread_pool_pausing( &connection_pool ))
1318                 connection_wake_writers( &connections[s] );
1319
1320         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1321                 connection_read_thread, (void *)(long)s );
1322
1323         if( rc != 0 ) {
1324                 Debug( LDAP_DEBUG_ANY,
1325                         "connection_read_activate(%d): submit failed (%d)\n",
1326                         s, rc, 0 );
1327         }
1328
1329         return rc;
1330 }
1331
1332 static int
1333 connection_read( ber_socket_t s, conn_readinfo *cri )
1334 {
1335         int rc = 0;
1336         Connection *c;
1337
1338         assert( connections != NULL );
1339
1340         /* get (locked) connection */
1341         c = connection_get( s );
1342
1343         if( c == NULL ) {
1344                 Debug( LDAP_DEBUG_ANY,
1345                         "connection_read(%ld): no connection!\n",
1346                         (long) s, 0, 0 );
1347
1348                 return -1;
1349         }
1350
1351         c->c_n_read++;
1352
1353         if( c->c_conn_state == SLAP_C_CLOSING ) {
1354                 Debug( LDAP_DEBUG_CONNS,
1355                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1356                         s, c->c_connid, 0 );
1357                 connection_return( c );
1358                 return 0;
1359         }
1360
1361         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1362                 cri->func = c->c_clientfunc;
1363                 cri->arg = c->c_clientarg;
1364                 /* read should already be cleared */
1365                 connection_return( c );
1366                 return 0;
1367         }
1368
1369         Debug( LDAP_DEBUG_TRACE,
1370                 "connection_read(%d): checking for input on id=%lu\n",
1371                 s, c->c_connid, 0 );
1372
1373 #ifdef HAVE_TLS
1374         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1375                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1376                 if ( rc < 0 ) {
1377                         Debug( LDAP_DEBUG_TRACE,
1378                                 "connection_read(%d): TLS accept failure "
1379                                 "error=%d id=%lu, closing\n",
1380                                 s, rc, c->c_connid );
1381
1382                         c->c_needs_tls_accept = 0;
1383                         /* c_mutex is locked */
1384                         connection_closing( c, "TLS negotiation failure" );
1385                         connection_close( c );
1386                         connection_return( c );
1387                         return 0;
1388
1389                 } else if ( rc == 0 ) {
1390                         void *ssl;
1391                         struct berval authid = BER_BVNULL;
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                         Statslog( LDAP_DEBUG_STATS,
1410                                 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1411                             c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1412                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1413                         if ( authid.bv_val ) free( authid.bv_val );
1414                 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1415                         LBER_SB_OPT_NEEDS_WRITE, NULL )) {      /* need to retry */
1416                         slapd_set_write( s, 1 );
1417                         connection_return( c );
1418                         return 0;
1419                 }
1420
1421                 /* if success and data is ready, fall thru to data input loop */
1422                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1423                 {
1424                         slapd_set_read( s, 1 );
1425                         connection_return( c );
1426                         return 0;
1427                 }
1428         }
1429 #endif
1430
1431 #ifdef HAVE_CYRUS_SASL
1432         if ( c->c_sasl_layers ) {
1433                 /* If previous layer is not removed yet, give up for now */
1434                 if ( !c->c_sasl_sockctx ) {
1435                         slapd_set_read( s, 1 );
1436                         connection_return( c );
1437                         return 0;
1438                 }
1439
1440                 c->c_sasl_layers = 0;
1441
1442                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1443                 if( rc != LDAP_SUCCESS ) {
1444                         Debug( LDAP_DEBUG_TRACE,
1445                                 "connection_read(%d): SASL install error "
1446                                 "error=%d id=%lu, closing\n",
1447                                 s, rc, c->c_connid );
1448
1449                         /* c_mutex is locked */
1450                         connection_closing( c, "SASL layer install failure" );
1451                         connection_close( c );
1452                         connection_return( c );
1453                         return 0;
1454                 }
1455         }
1456 #endif
1457
1458 #define CONNECTION_INPUT_LOOP 1
1459 /* #define      DATA_READY_LOOP 1 */
1460
1461         do {
1462                 /* How do we do this without getting into a busy loop ? */
1463                 rc = connection_input( c, cri );
1464         }
1465 #ifdef DATA_READY_LOOP
1466         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1467 #elif defined CONNECTION_INPUT_LOOP
1468         while(!rc);
1469 #else
1470         while(0);
1471 #endif
1472
1473         if( rc < 0 ) {
1474                 Debug( LDAP_DEBUG_CONNS,
1475                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1476                         s, rc, c->c_connid );
1477
1478                 /* c_mutex is locked */
1479                 connection_closing( c, conn_lost_str );
1480                 connection_close( c );
1481                 connection_return( c );
1482                 return 0;
1483         }
1484
1485         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1486                 slapd_set_write( s, 0 );
1487         }
1488
1489         slapd_set_read( s, 1 );
1490         connection_return( c );
1491
1492         return 0;
1493 }
1494
1495 static int
1496 connection_input( Connection *conn , conn_readinfo *cri )
1497 {
1498         Operation *op;
1499         ber_tag_t       tag;
1500         ber_len_t       len;
1501         ber_int_t       msgid;
1502         BerElement      *ber;
1503         int             rc;
1504 #ifdef LDAP_CONNECTIONLESS
1505         Sockaddr        peeraddr;
1506         char            *cdn = NULL;
1507 #endif
1508         char *defer = NULL;
1509         void *ctx;
1510
1511         if ( conn->c_currentber == NULL &&
1512                 ( conn->c_currentber = ber_alloc()) == NULL )
1513         {
1514                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1515                 return -1;
1516         }
1517
1518         sock_errset(0);
1519
1520 #ifdef LDAP_CONNECTIONLESS
1521         if ( conn->c_is_udp ) {
1522 #if defined(LDAP_PF_INET6)
1523                 char peername[sizeof("IP=[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535")];
1524                 char addr[INET6_ADDRSTRLEN];
1525 #else
1526                 char peername[sizeof("IP=255.255.255.255:65336")];
1527                 char addr[INET_ADDRSTRLEN];
1528 #endif
1529                 const char *peeraddr_string = NULL;
1530
1531                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(Sockaddr));
1532                 if (len != sizeof(Sockaddr)) return 1;
1533
1534 #if defined(LDAP_PF_INET6)
1535                 if (peeraddr.sa_addr.sa_family == AF_INET6) {
1536                         if ( IN6_IS_ADDR_V4MAPPED(&peeraddr.sa_in6_addr.sin6_addr) ) {
1537 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1538                                 peeraddr_string = inet_ntop( AF_INET,
1539                                    ((struct in_addr *)&peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]),
1540                                    addr, sizeof(addr) );
1541 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1542                                 peeraddr_string = inet_ntoa( *((struct in_addr *)
1543                                         &peeraddr.sa_in6_addr.sin6_addr.s6_addr[12]) );
1544 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1545                                 if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN;
1546                                 sprintf( peername, "IP=%s:%d", peeraddr_string,
1547                                         (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) );
1548                         } else {
1549                                 peeraddr_string = inet_ntop( AF_INET6,
1550                                       &peeraddr.sa_in6_addr.sin6_addr,
1551                                       addr, sizeof addr );
1552                                 if ( !peeraddr_string ) peeraddr_string = SLAP_STRING_UNKNOWN;
1553                                 sprintf( peername, "IP=[%s]:%d", peeraddr_string,
1554                                          (unsigned) ntohs( peeraddr.sa_in6_addr.sin6_port ) );
1555                         }
1556                 } else
1557 #endif
1558 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1559                 {
1560                         peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1561                            addr, sizeof(addr) );
1562 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1563                         peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1564 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1565                         sprintf( peername, "IP=%s:%d",
1566                                  peeraddr_string,
1567                                 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1568                 }
1569                 Statslog( LDAP_DEBUG_STATS,
1570                         "conn=%lu UDP request from %s (%s) accepted.\n",
1571                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1572         }
1573 #endif
1574
1575         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1576         if ( tag != LDAP_TAG_MESSAGE ) {
1577                 int err = sock_errno();
1578
1579                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1580                         /* log, close and send error */
1581                         Debug( LDAP_DEBUG_TRACE,
1582                                 "ber_get_next on fd %d failed errno=%d (%s)\n",
1583                         conn->c_sd, err, sock_errstr(err) );
1584                         ber_free( conn->c_currentber, 1 );
1585                         conn->c_currentber = NULL;
1586
1587                         return -2;
1588                 }
1589                 return 1;
1590         }
1591
1592         ber = conn->c_currentber;
1593         conn->c_currentber = NULL;
1594
1595         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1596                 /* log, close and send error */
1597                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1598                 ber_free( ber, 1 );
1599                 return -1;
1600         }
1601
1602         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1603                 /* log, close and send error */
1604                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1605                 ber_free( ber, 1 );
1606
1607                 return -1;
1608         }
1609
1610 #ifdef LDAP_CONNECTIONLESS
1611         if( conn->c_is_udp ) {
1612                 if( tag == LBER_OCTETSTRING ) {
1613                         if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1614                                 tag = ber_peek_tag( ber, &len );
1615                 }
1616                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1617                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1618                         ber_free( ber, 1 );
1619                         return 0;
1620                 }
1621         }
1622 #endif
1623
1624         if(tag == LDAP_REQ_BIND) {
1625                 /* immediately abandon all existing operations upon BIND */
1626                 connection_abandon( conn );
1627         }
1628
1629         ctx = cri->ctx;
1630         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1631
1632         Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1633                 (long) op->o_time, 0);
1634
1635         op->o_conn = conn;
1636         /* clear state if the connection is being reused from inactive */
1637         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1638                 memset( &conn->c_pagedresults_state, 0,
1639                         sizeof( conn->c_pagedresults_state ) );
1640         }
1641
1642         op->o_res_ber = NULL;
1643
1644 #ifdef LDAP_CONNECTIONLESS
1645         if (conn->c_is_udp) {
1646                 if ( cdn ) {
1647                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1648                         op->o_protocol = LDAP_VERSION2;
1649                 }
1650                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1651                 if (op->o_res_ber == NULL) return 1;
1652
1653                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1654                         sizeof(struct sockaddr), 0 );
1655
1656                 if (rc != sizeof(struct sockaddr)) {
1657                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1658                         return 1;
1659                 }
1660
1661                 if (op->o_protocol == LDAP_VERSION2) {
1662                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1663                         if (rc == -1) {
1664                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1665                                 return rc;
1666                         }
1667                 }
1668         }
1669 #endif /* LDAP_CONNECTIONLESS */
1670
1671         rc = 0;
1672
1673         /* Don't process requests when the conn is in the middle of a
1674          * Bind, or if it's closing. Also, don't let any single conn
1675          * use up all the available threads, and don't execute if we're
1676          * currently blocked on output. And don't execute if there are
1677          * already pending ops, let them go first.  Abandon operations
1678          * get exceptions to some, but not all, cases.
1679          */
1680         switch( tag ){
1681         default:
1682                 /* Abandon and Unbind are exempt from these checks */
1683                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1684                         defer = "closing";
1685                         break;
1686                 } else if (conn->c_writewaiter) {
1687                         defer = "awaiting write";
1688                         break;
1689                 } else if (conn->c_n_ops_pending) {
1690                         defer = "pending operations";
1691                         break;
1692                 }
1693                 /* FALLTHRU */
1694         case LDAP_REQ_ABANDON:
1695                 /* Unbind is exempt from these checks */
1696                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1697                         defer = "too many executing";
1698                         break;
1699                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1700                         defer = "binding";
1701                         break;
1702                 }
1703                 /* FALLTHRU */
1704         case LDAP_REQ_UNBIND:
1705                 break;
1706         }
1707
1708         if( defer ) {
1709                 int max = conn->c_dn.bv_len
1710                         ? slap_conn_max_pending_auth
1711                         : slap_conn_max_pending;
1712
1713                 Debug( LDAP_DEBUG_ANY,
1714                         "connection_input: conn=%lu deferring operation: %s\n",
1715                         conn->c_connid, defer, 0 );
1716                 conn->c_n_ops_pending++;
1717                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1718                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1719
1720         } else {
1721                 conn->c_n_ops_executing++;
1722
1723                 /*
1724                  * The first op will be processed in the same thread context,
1725                  * as long as there is only one op total.
1726                  * Subsequent ops will be submitted to the pool by
1727                  * calling connection_op_activate()
1728                  */
1729                 if ( cri->op == NULL ) {
1730                         /* the first incoming request */
1731                         connection_op_queue( op );
1732                         cri->op = op;
1733                 } else {
1734                         if ( !cri->nullop ) {
1735                                 cri->nullop = 1;
1736                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1737                                         connection_operation, (void *) cri->op );
1738                         }
1739                         connection_op_activate( op );
1740                 }
1741         }
1742
1743 #ifdef NO_THREADS
1744         if ( conn->c_struct_state != SLAP_C_USED ) {
1745                 /* connection must have got closed underneath us */
1746                 return 1;
1747         }
1748 #endif
1749
1750         assert( conn->c_struct_state == SLAP_C_USED );
1751         return rc;
1752 }
1753
1754 static int
1755 connection_resched( Connection *conn )
1756 {
1757         Operation *op;
1758
1759         if( conn->c_writewaiter )
1760                 return 0;
1761
1762         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1763                 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1764                         "attempting closing conn=%lu sd=%d\n",
1765                         conn->c_connid, conn->c_sd, 0 );
1766                 connection_close( conn );
1767                 return 0;
1768         }
1769
1770         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1771                 /* other states need different handling */
1772                 return 0;
1773         }
1774
1775         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1776                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1777
1778                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1779                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1780
1781                 /* pending operations should not be marked for abandonment */
1782                 assert(!op->o_abandon);
1783
1784                 conn->c_n_ops_pending--;
1785                 conn->c_n_ops_executing++;
1786
1787                 connection_op_activate( op );
1788
1789                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1790         }
1791         return 0;
1792 }
1793
1794 static void
1795 connection_init_log_prefix( Operation *op )
1796 {
1797         if ( op->o_connid == (unsigned long)(-1) ) {
1798                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1799                         "conn=-1 op=%lu", op->o_opid );
1800
1801         } else {
1802                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1803                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1804         }
1805 }
1806
1807 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1808 {
1809         op->o_conn->c_sasl_bindop = NULL;
1810
1811         ch_free( op->o_callback );
1812         op->o_callback = NULL;
1813
1814         return SLAP_CB_CONTINUE;
1815 }
1816
1817 static int connection_bind_cb( Operation *op, SlapReply *rs )
1818 {
1819         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1820         op->o_conn->c_sasl_bind_in_progress =
1821                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1822
1823         /* Moved here from bind.c due to ITS#4158 */
1824         op->o_conn->c_sasl_bindop = NULL;
1825         if ( op->orb_method == LDAP_AUTH_SASL ) {
1826                 if( rs->sr_err == LDAP_SUCCESS ) {
1827                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1828                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1829                                 /* edn is always normalized already */
1830                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1831                         }
1832                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1833                         BER_BVZERO( &op->orb_edn );
1834                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1835                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1836
1837                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1838                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1839                                 op->o_conn->c_ssf = op->orb_ssf;
1840                         }
1841
1842                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1843                                 ber_len_t max = sockbuf_max_incoming_auth;
1844                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1845                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1846                         }
1847
1848                         /* log authorization identity */
1849                         Statslog( LDAP_DEBUG_STATS,
1850                                 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1851                                 op->o_log_prefix,
1852                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1853                                 op->o_conn->c_authmech.bv_val,
1854                                 op->orb_ssf, op->o_conn->c_ssf );
1855
1856                         Debug( LDAP_DEBUG_TRACE,
1857                                 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1858                                 op->o_conn->c_authmech.bv_val,
1859                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1860                                 op->orb_ssf );
1861
1862                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1863                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1864                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1865                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1866                         }
1867                 }
1868         }
1869         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1870
1871         ch_free( op->o_callback );
1872         op->o_callback = NULL;
1873
1874         return SLAP_CB_CONTINUE;
1875 }
1876
1877 static void connection_op_queue( Operation *op )
1878 {
1879         ber_tag_t tag = op->o_tag;
1880
1881         if (tag == LDAP_REQ_BIND) {
1882                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1883                 sc->sc_response = connection_bind_cb;
1884                 sc->sc_cleanup = connection_bind_cleanup_cb;
1885                 sc->sc_next = op->o_callback;
1886                 op->o_callback = sc;
1887                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1888         }
1889
1890         if (!op->o_dn.bv_len) {
1891                 op->o_authz = op->o_conn->c_authz;
1892                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1893                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1894                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1895                 } else {
1896                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1897                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1898                 }
1899         }
1900
1901         op->o_authtype = op->o_conn->c_authtype;
1902         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1903
1904         if (!op->o_protocol) {
1905                 op->o_protocol = op->o_conn->c_protocol
1906                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1907         }
1908
1909         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1910                 op->o_protocol > LDAP_VERSION2)
1911         {
1912                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1913         }
1914
1915         op->o_connid = op->o_conn->c_connid;
1916         connection_init_log_prefix( op );
1917
1918         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1919 }
1920
1921 static int connection_op_activate( Operation *op )
1922 {
1923         int rc;
1924
1925         connection_op_queue( op );
1926
1927         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1928                 connection_operation, (void *) op );
1929
1930         if ( rc != 0 ) {
1931                 Debug( LDAP_DEBUG_ANY,
1932                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1933                         rc, op->o_connid, 0 );
1934                 /* should move op to pending list */
1935         }
1936
1937         return rc;
1938 }
1939
1940 int connection_write(ber_socket_t s)
1941 {
1942         Connection *c;
1943         Operation *op;
1944
1945         assert( connections != NULL );
1946
1947         c = connection_get( s );
1948         if( c == NULL ) {
1949                 Debug( LDAP_DEBUG_ANY,
1950                         "connection_write(%ld): no connection!\n",
1951                         (long)s, 0, 0 );
1952                 return -1;
1953         }
1954
1955         slapd_clr_write( s, 0 );
1956
1957 #ifdef HAVE_TLS
1958         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1959                 connection_return( c );
1960                 connection_read_activate( s );
1961                 return 0;
1962         }
1963 #endif
1964
1965         c->c_n_write++;
1966
1967         Debug( LDAP_DEBUG_TRACE,
1968                 "connection_write(%d): waking output for id=%lu\n",
1969                 s, c->c_connid, 0 );
1970         ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1971         ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1972         ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1973
1974         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1975                 slapd_set_read( s, 1 );
1976         }
1977         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1978                 slapd_set_write( s, 1 );
1979         }
1980
1981         /* If there are ops pending because of a writewaiter,
1982          * start one up.
1983          */
1984         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1985                 if ( !c->c_writewaiter ) break;
1986                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1987
1988                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1989                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1990
1991                 /* pending operations should not be marked for abandonment */
1992                 assert(!op->o_abandon);
1993
1994                 c->c_n_ops_pending--;
1995                 c->c_n_ops_executing++;
1996
1997                 connection_op_activate( op );
1998
1999                 break;
2000         }
2001
2002         connection_return( c );
2003         return 0;
2004 }
2005
2006 #ifdef LDAP_SLAPI
2007 typedef struct conn_fake_extblock {
2008         void *eb_conn;
2009         void *eb_op;
2010 } conn_fake_extblock;
2011
2012 static void
2013 connection_fake_destroy(
2014         void *key,
2015         void *data )
2016 {
2017         Connection conn = {0};
2018         Operation op = {0};
2019         Opheader ohdr = {0};
2020
2021         conn_fake_extblock *eb = data;
2022
2023         op.o_hdr = &ohdr;
2024         op.o_hdr->oh_extensions = eb->eb_op;
2025         conn.c_extensions = eb->eb_conn;
2026         op.o_conn = &conn;
2027         conn.c_connid = -1;
2028         op.o_connid = -1;
2029
2030         ber_memfree_x( eb, NULL );
2031         slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
2032         slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
2033 }
2034 #endif
2035
2036 void
2037 connection_fake_init(
2038         Connection *conn,
2039         OperationBuffer *opbuf,
2040         void *ctx )
2041 {
2042         connection_fake_init2( conn, opbuf, ctx, 1 );
2043 }
2044
2045 void
2046 operation_fake_init(
2047         Connection *conn,
2048         Operation *op,
2049         void *ctx,
2050         int newmem )
2051 {
2052         /* set memory context */
2053         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2054                 newmem );
2055         op->o_tmpmfuncs = &slap_sl_mfuncs;
2056         op->o_threadctx = ctx;
2057         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2058
2059         op->o_counters = &slap_counters;
2060         op->o_conn = conn;
2061         op->o_connid = op->o_conn->c_connid;
2062         connection_init_log_prefix( op );
2063 }
2064
2065
2066 void
2067 connection_fake_init2(
2068         Connection *conn,
2069         OperationBuffer *opbuf,
2070         void *ctx,
2071         int newmem )
2072 {
2073         Operation *op = (Operation *) opbuf;
2074
2075         conn->c_connid = -1;
2076         conn->c_conn_idx = -1;
2077         conn->c_send_ldap_result = slap_send_ldap_result;
2078         conn->c_send_search_entry = slap_send_search_entry;
2079         conn->c_send_search_reference = slap_send_search_reference;
2080         conn->c_send_ldap_extended = slap_send_ldap_extended;
2081         conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2082         conn->c_listener = (Listener *)&dummy_list;
2083         conn->c_peer_domain = slap_empty_bv;
2084         conn->c_peer_name = slap_empty_bv;
2085
2086         memset( opbuf, 0, sizeof( *opbuf ));
2087         op->o_hdr = &opbuf->ob_hdr;
2088         op->o_controls = opbuf->ob_controls;
2089
2090         operation_fake_init( conn, op, ctx, newmem );
2091
2092 #ifdef LDAP_SLAPI
2093         if ( slapi_plugins_used ) {
2094                 conn_fake_extblock *eb;
2095                 void *ebx = NULL;
2096
2097                 /* Use thread keys to make sure these eventually get cleaned up */
2098                 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2099                                 &ebx, NULL )) {
2100                         eb = ch_malloc( sizeof( *eb ));
2101                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2102                         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2103                         eb->eb_conn = conn->c_extensions;
2104                         eb->eb_op = op->o_hdr->oh_extensions;
2105                         ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2106                                 eb, connection_fake_destroy, NULL, NULL );
2107                 } else {
2108                         eb = ebx;
2109                         conn->c_extensions = eb->eb_conn;
2110                         op->o_hdr->oh_extensions = eb->eb_op;
2111                 }
2112         }
2113 #endif /* LDAP_SLAPI */
2114
2115         slap_op_time( &op->o_time, &op->o_tincr );
2116 }
2117
2118 void
2119 connection_assign_nextid( Connection *conn )
2120 {
2121         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2122         conn->c_connid = conn_nextid++;
2123         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2124 }