git.sur5r.net Git - openldap/blob - servers/slapd/connection.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2007 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29 #ifdef HAVE_LIMITS_H
  30 #include <limits.h>
  31 #endif
  32
  33 #include <ac/socket.h>
  34 #include <ac/errno.h>
  35 #include <ac/string.h>
  36 #include <ac/time.h>
  37 #include <ac/unistd.h>
  38
  39 #include "lutil.h"
  40 #include "slap.h"
  41
  42 #ifdef LDAP_SLAPI
  43 #include "slapi/slapi.h"
  44 #endif
  45
  46 /* protected by connections_mutex */
  47 static ldap_pvt_thread_mutex_t connections_mutex;
  48 static Connection *connections = NULL;
  49
  50 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
  51 static unsigned long conn_nextid = 0;
  52
  53 static const char conn_lost_str[] = "connection lost";
  54
  55 /* structure state (protected by connections_mutex) */
  56 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  57 #define SLAP_C_UNUSED                   0x01
  58 #define SLAP_C_USED                             0x02
  59 #define SLAP_C_PENDING                  0x03
  60
  61 /* connection state (protected by c_mutex ) */
  62 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  63 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  64 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  65 #define SLAP_C_BINDING                  0x03    /* binding */
  66 #define SLAP_C_CLOSING                  0x04    /* closing */
  67 #define SLAP_C_CLIENT                   0x05    /* outbound client conn */
  68
  69 const char *
  70 connection_state2str( int state )
  71 {
  72         switch( state ) {
  73         case SLAP_C_INVALID:    return "!";
  74         case SLAP_C_INACTIVE:   return "|";
  75         case SLAP_C_ACTIVE:             return "";
  76         case SLAP_C_BINDING:    return "B";
  77         case SLAP_C_CLOSING:    return "C";
  78         case SLAP_C_CLIENT:             return "L";
  79         }
  80
  81         return "?";
  82 }
  83
  84 static Connection* connection_get( ber_socket_t s );
  85
  86 typedef struct conn_readinfo {
  87         Operation *op;
  88         ldap_pvt_thread_start_t *func;
  89         void *arg;
  90         void *ctx;
  91         int nullop;
  92 } conn_readinfo;
  93
  94 static int connection_input( Connection *c, conn_readinfo *cri );
  95 static void connection_close( Connection *c );
  96
  97 static int connection_op_activate( Operation *op );
  98 static void connection_op_queue( Operation *op );
  99 static int connection_resched( Connection *conn );
 100 static void connection_abandon( Connection *conn );
 101 static void connection_destroy( Connection *c );
 102
 103 static ldap_pvt_thread_start_t connection_operation;
 104
 105 /*
 106  * Initialize connection management infrastructure.
 107  */
 108 int connections_init(void)
 109 {
 110         int i;
 111
 112         assert( connections == NULL );
 113
 114         if( connections != NULL) {
 115                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 116                         0, 0, 0 );
 117                 return -1;
 118         }
 119
 120         /* should check return of every call */
 121         ldap_pvt_thread_mutex_init( &connections_mutex );
 122         ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
 123
 124         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 125
 126         if( connections == NULL ) {
 127                 Debug( LDAP_DEBUG_ANY, "connections_init: "
 128                         "allocation (%d*%ld) of connection array failed\n",
 129                         dtblsize, (long) sizeof(Connection), 0 );
 130                 return -1;
 131         }
 132
 133         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 134         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 135
 136         for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
 137
 138         /*
 139          * per entry initialization of the Connection array initialization
 140          * will be done by connection_init()
 141          */
 142
 143         return 0;
 144 }
 145
 146 /*
 147  * Destroy connection management infrastructure.
 148  */
 149
 150 int connections_destroy(void)
 151 {
 152         ber_socket_t i;
 153
 154         /* should check return of every call */
 155
 156         if( connections == NULL) {
 157                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 158                         0, 0, 0 );
 159                 return -1;
 160         }
 161
 162         for ( i = 0; i < dtblsize; i++ ) {
 163                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 164                         ber_sockbuf_free( connections[i].c_sb );
 165                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 166                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 167                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 168 #ifdef LDAP_SLAPI
 169                         if ( slapi_plugins_used ) {
 170                                 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
 171                                         &connections[i] );
 172                         }
 173 #endif
 174                 }
 175         }
 176
 177         free( connections );
 178         connections = NULL;
 179
 180         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 181         ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
 182         return 0;
 183 }
 184
 185 /*
 186  * shutdown all connections
 187  */
 188 int connections_shutdown(void)
 189 {
 190         ber_socket_t i;
 191
 192         for ( i = 0; i < dtblsize; i++ ) {
 193                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 194                         ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 195                         if( connections[i].c_struct_state == SLAP_C_USED ) {
 196
 197                                 /* give persistent clients a chance to cleanup */
 198                                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 199                                         ldap_pvt_thread_pool_submit( &connection_pool,
 200                                         connections[i].c_clientfunc, connections[i].c_clientarg );
 201                                 } else {
 202                                         /* c_mutex is locked */
 203                                         connection_closing( &connections[i], "slapd shutdown" );
 204                                         connection_close( &connections[i] );
 205                                 }
 206                         }
 207                         ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 208                 }
 209         }
 210
 211         return 0;
 212 }
 213
 214 /*
 215  * Timeout idle connections.
 216  */
 217 int connections_timeout_idle(time_t now)
 218 {
 219         int i = 0;
 220         int connindex;
 221         Connection* c;
 222
 223         for( c = connection_first( &connindex );
 224                 c != NULL;
 225                 c = connection_next( c, &connindex ) )
 226         {
 227                 /* Don't timeout a slow-running request or a persistent
 228                  * outbound connection */
 229                 if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
 230                         continue;
 231                 }
 232
 233                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 234                         /* close it */
 235                         connection_closing( c, "idletimeout" );
 236                         connection_close( c );
 237                         i++;
 238                 }
 239         }
 240         connection_done( c );
 241
 242         return i;
 243 }
 244
 245 static Connection* connection_get( ber_socket_t s )
 246 {
 247         Connection *c;
 248
 249         Debug( LDAP_DEBUG_ARGS,
 250                 "connection_get(%ld)\n",
 251                 (long) s, 0, 0 );
 252
 253         assert( connections != NULL );
 254
 255         if(s == AC_SOCKET_INVALID) return NULL;
 256
 257 #ifndef HAVE_WINSOCK
 258         assert( s < dtblsize );
 259         c = &connections[s];
 260
 261 #else
 262         c = NULL;
 263         {
 264                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 265                 for(i=0; i<dtblsize; i++) {
 266                         if( connections[i].c_struct_state == SLAP_C_PENDING )
 267                                 continue;
 268
 269                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 270                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 271                                 assert( connections[i].c_sb == 0 );
 272                                 break;
 273                         }
 274
 275                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 276                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 277                                 assert( connections[i].c_sd == AC_SOCKET_INVALID );
 278                                 continue;
 279                         }
 280
 281                         /* state can actually change from used -> unused by resched,
 282                          * so don't assert details here.
 283                          */
 284
 285                         if( connections[i].c_sd == s ) {
 286                                 c = &connections[i];
 287                                 break;
 288                         }
 289                 }
 290                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 291         }
 292 #endif
 293
 294         if( c != NULL ) {
 295                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 296
 297                 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 298
 299 #ifdef HAVE_WINSOCK
 300                 /* Avoid race condition after releasing
 301                  * connections_mutex
 302                  */
 303                 if ( c->c_sd != s ) {
 304                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 305                         return NULL;
 306                 }
 307 #endif
 308                 if( c->c_struct_state != SLAP_C_USED ) {
 309                         /* connection must have been closed due to resched */
 310
 311                         assert( c->c_conn_state == SLAP_C_INVALID );
 312                         assert( c->c_sd == AC_SOCKET_INVALID );
 313
 314                         Debug( LDAP_DEBUG_TRACE,
 315                                 "connection_get(%d): connection not used\n",
 316                                 s, 0, 0 );
 317
 318                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319                         return NULL;
 320                 }
 321
 322                 Debug( LDAP_DEBUG_TRACE,
 323                         "connection_get(%d): got connid=%lu\n",
 324                         s, c->c_connid, 0 );
 325
 326                 c->c_n_get++;
 327
 328                 assert( c->c_struct_state == SLAP_C_USED );
 329                 assert( c->c_conn_state != SLAP_C_INVALID );
 330                 assert( c->c_sd != AC_SOCKET_INVALID );
 331
 332 #ifndef SLAPD_MONITOR
 333                 if ( global_idletimeout > 0 )
 334 #endif /* ! SLAPD_MONITOR */
 335                 {
 336                         c->c_activitytime = slap_get_time();
 337                 }
 338         }
 339
 340         return c;
 341 }
 342
 343 static void connection_return( Connection *c )
 344 {
 345         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 346 }
 347
 348 Connection * connection_init(
 349         ber_socket_t s,
 350         Listener *listener,
 351         const char* dnsname,
 352         const char* peername,
 353         int flags,
 354         slap_ssf_t ssf,
 355         struct berval *authid
 356         LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
 357 {
 358         unsigned long id;
 359         Connection *c;
 360         int doinit = 0;
 361
 362         assert( connections != NULL );
 363
 364         assert( listener != NULL );
 365         assert( dnsname != NULL );
 366         assert( peername != NULL );
 367
 368 #ifndef HAVE_TLS
 369         assert( !( flags & CONN_IS_TLS ));
 370 #endif
 371
 372         if( s == AC_SOCKET_INVALID ) {
 373                 Debug( LDAP_DEBUG_ANY,
 374                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 375                 return NULL;
 376         }
 377
 378         assert( s >= 0 );
 379 #ifndef HAVE_WINSOCK
 380         assert( s < dtblsize );
 381         c = &connections[s];
 382         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 383                 doinit = 1;
 384         } else {
 385                 assert( c->c_struct_state == SLAP_C_UNUSED );
 386         }
 387 #else
 388         {
 389                 ber_socket_t i;
 390                 c = NULL;
 391
 392                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 393                 for( i=0; i < dtblsize; i++) {
 394                         if ( connections[i].c_struct_state == SLAP_C_PENDING )
 395                                 continue;
 396
 397                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 398                                 assert( connections[i].c_sb == 0 );
 399                                 c = &connections[i];
 400                                 c->c_struct_state = SLAP_C_PENDING;
 401                                 doinit = 1;
 402                                 break;
 403                         }
 404
 405                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 406                                 c = &connections[i];
 407                                 c->c_struct_state = SLAP_C_PENDING;
 408                                 break;
 409                         }
 410
 411                         if( connections[i].c_conn_state == SLAP_C_CLIENT ) continue;
 412
 413                         assert( connections[i].c_struct_state == SLAP_C_USED );
 414                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 415                 }
 416                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 417
 418                 if( c == NULL ) {
 419                         Debug( LDAP_DEBUG_ANY,
 420                                 "connection_init(%d): connection table full "
 421                                 "(%d/%d)\n", s, i, dtblsize);
 422                         return NULL;
 423                 }
 424         }
 425 #endif
 426
 427         if( doinit ) {
 428                 c->c_send_ldap_result = slap_send_ldap_result;
 429                 c->c_send_search_entry = slap_send_search_entry;
 430                 c->c_send_search_reference = slap_send_search_reference;
 431                 c->c_send_ldap_extended = slap_send_ldap_extended;
 432                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 433
 434                 BER_BVZERO( &c->c_authmech );
 435                 BER_BVZERO( &c->c_dn );
 436                 BER_BVZERO( &c->c_ndn );
 437
 438                 c->c_listener = NULL;
 439                 BER_BVZERO( &c->c_peer_domain );
 440                 BER_BVZERO( &c->c_peer_name );
 441
 442                 LDAP_STAILQ_INIT(&c->c_ops);
 443                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 444
 445 #ifdef LDAP_X_TXN
 446                 c->c_txn = CONN_TXN_INACTIVE;
 447                 c->c_txn_backend = NULL;
 448                 LDAP_STAILQ_INIT(&c->c_txn_ops);
 449 #endif
 450
 451                 BER_BVZERO( &c->c_sasl_bind_mech );
 452                 c->c_sasl_done = 0;
 453                 c->c_sasl_authctx = NULL;
 454                 c->c_sasl_sockctx = NULL;
 455                 c->c_sasl_extra = NULL;
 456                 c->c_sasl_bindop = NULL;
 457
 458                 c->c_sb = ber_sockbuf_alloc( );
 459
 460                 {
 461                         ber_len_t max = sockbuf_max_incoming;
 462                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 463                 }
 464
 465                 c->c_currentber = NULL;
 466
 467                 /* should check status of thread calls */
 468                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 469                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 470                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 471
 472 #ifdef LDAP_SLAPI
 473                 if ( slapi_plugins_used ) {
 474                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 475                 }
 476 #endif
 477         }
 478
 479         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 480
 481         assert( BER_BVISNULL( &c->c_authmech ) );
 482         assert( BER_BVISNULL( &c->c_dn ) );
 483         assert( BER_BVISNULL( &c->c_ndn ) );
 484         assert( c->c_listener == NULL );
 485         assert( BER_BVISNULL( &c->c_peer_domain ) );
 486         assert( BER_BVISNULL( &c->c_peer_name ) );
 487         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 488         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 489 #ifdef LDAP_X_TXN
 490         assert( c->c_txn == CONN_TXN_INACTIVE );
 491         assert( c->c_txn_backend == NULL );
 492         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 493 #endif
 494         assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
 495         assert( c->c_sasl_done == 0 );
 496         assert( c->c_sasl_authctx == NULL );
 497         assert( c->c_sasl_sockctx == NULL );
 498         assert( c->c_sasl_extra == NULL );
 499         assert( c->c_sasl_bindop == NULL );
 500         assert( c->c_currentber == NULL );
 501         assert( c->c_writewaiter == 0);
 502
 503         c->c_listener = listener;
 504         c->c_sd = s;
 505
 506         if ( flags & CONN_IS_CLIENT ) {
 507                 c->c_connid = 0;
 508                 c->c_conn_state = SLAP_C_CLIENT;
 509                 c->c_struct_state = SLAP_C_USED;
 510                 c->c_close_reason = "?";                        /* should never be needed */
 511                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
 512                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 513
 514                 return c;
 515         }
 516
 517         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 518         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 519
 520         c->c_n_ops_received = 0;
 521         c->c_n_ops_executing = 0;
 522         c->c_n_ops_pending = 0;
 523         c->c_n_ops_completed = 0;
 524
 525         c->c_n_get = 0;
 526         c->c_n_read = 0;
 527         c->c_n_write = 0;
 528
 529         /* set to zero until bind, implies LDAP_VERSION3 */
 530         c->c_protocol = 0;
 531
 532 #ifndef SLAPD_MONITOR
 533         if ( global_idletimeout > 0 )
 534 #endif /* ! SLAPD_MONITOR */
 535         {
 536                 c->c_activitytime = c->c_starttime = slap_get_time();
 537         }
 538
 539 #ifdef LDAP_CONNECTIONLESS
 540         c->c_is_udp = 0;
 541         if( flags & CONN_IS_UDP ) {
 542                 c->c_is_udp = 1;
 543 #ifdef LDAP_DEBUG
 544                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 545                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 546 #endif
 547                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 548                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 549                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 550                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 551         } else
 552 #endif /* LDAP_CONNECTIONLESS */
 553 #ifdef LDAP_PF_LOCAL
 554         if ( flags & CONN_IS_IPC ) {
 555 #ifdef LDAP_DEBUG
 556                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 557                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
 558 #endif
 559                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
 560                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 561 #ifdef LDAP_PF_LOCAL_SENDMSG
 562                 if ( !BER_BVISEMPTY( peerbv ))
 563                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
 564 #endif
 565         } else
 566 #endif /* LDAP_PF_LOCAL */
 567         {
 568 #ifdef LDAP_DEBUG
 569                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 570                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 571 #endif
 572                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 573                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 574         }
 575
 576 #ifdef LDAP_DEBUG
 577         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 578                 INT_MAX, (void*)"ldap_" );
 579 #endif
 580
 581         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 582                 c /* non-NULL */ ) < 0 )
 583         {
 584                 Debug( LDAP_DEBUG_ANY,
 585                         "connection_init(%d, %s): set nonblocking failed\n",
 586                         s, c->c_peer_name.bv_val, 0 );
 587         }
 588
 589         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 590         id = c->c_connid = conn_nextid++;
 591         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 592
 593         c->c_conn_state = SLAP_C_INACTIVE;
 594         c->c_struct_state = SLAP_C_USED;
 595         c->c_close_reason = "?";                        /* should never be needed */
 596
 597         c->c_ssf = c->c_transport_ssf = ssf;
 598         c->c_tls_ssf = 0;
 599
 600 #ifdef HAVE_TLS
 601         if ( flags & CONN_IS_TLS ) {
 602                 c->c_is_tls = 1;
 603                 c->c_needs_tls_accept = 1;
 604         } else {
 605                 c->c_is_tls = 0;
 606                 c->c_needs_tls_accept = 0;
 607         }
 608 #endif
 609
 610         slap_sasl_open( c, 0 );
 611         slap_sasl_external( c, ssf, authid );
 612
 613         slapd_add_internal( s, 1 );
 614         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 615
 616         backend_connection_init(c);
 617
 618         return c;
 619 }
 620
 621 void connection2anonymous( Connection *c )
 622 {
 623         assert( connections != NULL );
 624         assert( c != NULL );
 625
 626         {
 627                 ber_len_t max = sockbuf_max_incoming;
 628                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 629         }
 630
 631         if ( !BER_BVISNULL( &c->c_authmech ) ) {
 632                 ch_free(c->c_authmech.bv_val);
 633         }
 634         BER_BVZERO( &c->c_authmech );
 635
 636         if ( !BER_BVISNULL( &c->c_dn ) ) {
 637                 ch_free(c->c_dn.bv_val);
 638         }
 639         BER_BVZERO( &c->c_dn );
 640
 641         if ( !BER_BVISNULL( &c->c_ndn ) ) {
 642                 ch_free(c->c_ndn.bv_val);
 643         }
 644         BER_BVZERO( &c->c_ndn );
 645
 646         if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
 647                 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
 648         }
 649         BER_BVZERO( &c->c_sasl_authz_dn );
 650
 651         c->c_authz_backend = NULL;
 652 }
 653
 654 static void
 655 connection_destroy( Connection *c )
 656 {
 657         unsigned long   connid;
 658         const char              *close_reason;
 659         Sockbuf                 *sb;
 660         ber_socket_t    sd;
 661
 662         assert( connections != NULL );
 663         assert( c != NULL );
 664         assert( c->c_struct_state != SLAP_C_UNUSED );
 665         assert( c->c_conn_state != SLAP_C_INVALID );
 666         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 667         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 668 #ifdef LDAP_X_TXN
 669         assert( c->c_txn == CONN_TXN_INACTIVE );
 670         assert( c->c_txn_backend == NULL );
 671         assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
 672 #endif
 673         assert( c->c_writewaiter == 0);
 674
 675         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 676         connid = c->c_connid;
 677         close_reason = c->c_close_reason;
 678
 679         ldap_pvt_thread_mutex_lock( &connections_mutex );
 680         c->c_struct_state = SLAP_C_PENDING;
 681         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 682
 683         backend_connection_destroy(c);
 684
 685         c->c_protocol = 0;
 686         c->c_connid = -1;
 687
 688         c->c_activitytime = c->c_starttime = 0;
 689
 690         connection2anonymous( c );
 691         c->c_listener = NULL;
 692
 693         if(c->c_peer_domain.bv_val != NULL) {
 694                 free(c->c_peer_domain.bv_val);
 695         }
 696         BER_BVZERO( &c->c_peer_domain );
 697         if(c->c_peer_name.bv_val != NULL) {
 698                 free(c->c_peer_name.bv_val);
 699         }
 700         BER_BVZERO( &c->c_peer_name );
 701
 702         c->c_sasl_bind_in_progress = 0;
 703         if(c->c_sasl_bind_mech.bv_val != NULL) {
 704                 free(c->c_sasl_bind_mech.bv_val);
 705         }
 706         BER_BVZERO( &c->c_sasl_bind_mech );
 707
 708         slap_sasl_close( c );
 709
 710         if ( c->c_currentber != NULL ) {
 711                 ber_free( c->c_currentber, 1 );
 712                 c->c_currentber = NULL;
 713         }
 714
 715
 716 #ifdef LDAP_SLAPI
 717         /* call destructors, then constructors; avoids unnecessary allocation */
 718         if ( slapi_plugins_used ) {
 719                 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 720         }
 721 #endif
 722
 723         sd = c->c_sd;
 724         c->c_sd = AC_SOCKET_INVALID;
 725         c->c_conn_state = SLAP_C_INVALID;
 726         c->c_struct_state = SLAP_C_UNUSED;
 727         c->c_close_reason = "?";                        /* should never be needed */
 728
 729         sb = c->c_sb;
 730         c->c_sb = ber_sockbuf_alloc( );
 731         {
 732                 ber_len_t max = sockbuf_max_incoming;
 733                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 734         }
 735
 736         /* c must be fully reset by this point; when we call slapd_remove
 737          * it may get immediately reused by a new connection.
 738          */
 739         if ( sd != AC_SOCKET_INVALID ) {
 740                 slapd_remove( sd, sb, 1, 0, 0 );
 741
 742                 if ( close_reason == NULL ) {
 743                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
 744                                 connid, (long) sd, 0, 0, 0 );
 745                 } else {
 746                         Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
 747                                 connid, (long) sd, close_reason, 0, 0 );
 748                 }
 749         }
 750 }
 751
 752 int connection_state_closing( Connection *c )
 753 {
 754         /* c_mutex must be locked by caller */
 755
 756         int state;
 757         assert( c != NULL );
 758         assert( c->c_struct_state == SLAP_C_USED );
 759
 760         state = c->c_conn_state;
 761
 762         assert( state != SLAP_C_INVALID );
 763
 764         return state == SLAP_C_CLOSING;
 765 }
 766
 767 static void connection_abandon( Connection *c )
 768 {
 769         /* c_mutex must be locked by caller */
 770
 771         Operation *o, *next, op = {0};
 772         Opheader ohdr = {0};
 773         SlapReply rs = {0};
 774
 775         op.o_hdr = &ohdr;
 776         op.o_conn = c;
 777         op.o_connid = c->c_connid;
 778         op.o_tag = LDAP_REQ_ABANDON;
 779
 780         for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
 781                 next = LDAP_STAILQ_NEXT( o, o_next );
 782                 op.orn_msgid = o->o_msgid;
 783                 o->o_abandon = 1;
 784                 op.o_bd = frontendDB;
 785                 frontendDB->be_abandon( &op, &rs );
 786         }
 787
 788 #ifdef LDAP_X_TXN
 789         /* remove operations in pending transaction */
 790         while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
 791                 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
 792                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 793                 slap_op_free( o, NULL );
 794         }
 795
 796         /* clear transaction */
 797         c->c_txn_backend = NULL;
 798         c->c_txn = CONN_TXN_INACTIVE;
 799 #endif
 800
 801         /* remove pending operations */
 802         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 803                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 804                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 805                 slap_op_free( o, NULL );
 806         }
 807 }
 808
 809 void connection_closing( Connection *c, const char *why )
 810 {
 811         assert( connections != NULL );
 812         assert( c != NULL );
 813         assert( c->c_struct_state == SLAP_C_USED );
 814         assert( c->c_conn_state != SLAP_C_INVALID );
 815
 816         /* c_mutex must be locked by caller */
 817
 818         if( c->c_conn_state != SLAP_C_CLOSING ) {
 819                 Debug( LDAP_DEBUG_TRACE,
 820                         "connection_closing: readying conn=%lu sd=%d for close\n",
 821                         c->c_connid, c->c_sd, 0 );
 822                 /* update state to closing */
 823                 c->c_conn_state = SLAP_C_CLOSING;
 824                 c->c_close_reason = why;
 825
 826                 /* don't listen on this port anymore */
 827                 slapd_clr_read( c->c_sd, 0 );
 828
 829                 /* abandon active operations */
 830                 connection_abandon( c );
 831
 832                 /* wake write blocked operations */
 833                 if ( c->c_writewaiter ) {
 834                         ldap_pvt_thread_cond_signal( &c->c_write_cv );
 835                         /* ITS#4667 this may allow another thread to drop into
 836                          * connection_resched / connection_close before we
 837                          * finish, but that's OK.
 838                          */
 839                         slapd_clr_write( c->c_sd, 1 );
 840                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 841                         ldap_pvt_thread_mutex_lock( &c->c_write_mutex );
 842                         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 843                         ldap_pvt_thread_mutex_unlock( &c->c_write_mutex );
 844                 } else {
 845                         slapd_clr_write( c->c_sd, 1 );
 846                 }
 847
 848         } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
 849                 /* Client closed connection after doing Unbind. */
 850                 c->c_close_reason = NULL;
 851         }
 852 }
 853
 854 static void
 855 connection_close( Connection *c )
 856 {
 857         assert( connections != NULL );
 858         assert( c != NULL );
 859
 860         /* ITS#4667 we may have gotten here twice */
 861         if ( c->c_conn_state == SLAP_C_INVALID )
 862                 return;
 863
 864         assert( c->c_struct_state == SLAP_C_USED );
 865         assert( c->c_conn_state == SLAP_C_CLOSING );
 866
 867         /* NOTE: c_mutex should be locked by caller */
 868
 869         if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
 870                 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
 871         {
 872                 Debug( LDAP_DEBUG_TRACE,
 873                         "connection_close: deferring conn=%lu sd=%d\n",
 874                         c->c_connid, c->c_sd, 0 );
 875                 return;
 876         }
 877
 878         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 879                 c->c_connid, c->c_sd, 0 );
 880
 881         connection_destroy( c );
 882 }
 883
 884 unsigned long connections_nextid(void)
 885 {
 886         unsigned long id;
 887         assert( connections != NULL );
 888
 889         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
 890
 891         id = conn_nextid;
 892
 893         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
 894
 895         return id;
 896 }
 897
 898 Connection* connection_first( ber_socket_t *index )
 899 {
 900         assert( connections != NULL );
 901         assert( index != NULL );
 902
 903         ldap_pvt_thread_mutex_lock( &connections_mutex );
 904         for( *index = 0; *index < dtblsize; (*index)++) {
 905                 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
 906                         break;
 907                 }
 908         }
 909         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 910
 911         return connection_next(NULL, index);
 912 }
 913
 914 Connection* connection_next( Connection *c, ber_socket_t *index )
 915 {
 916         assert( connections != NULL );
 917         assert( index != NULL );
 918         assert( *index <= dtblsize );
 919
 920         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 921
 922         c = NULL;
 923
 924         ldap_pvt_thread_mutex_lock( &connections_mutex );
 925         for(; *index < dtblsize; (*index)++) {
 926                 int c_struct;
 927                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 928                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 929 #ifdef HAVE_WINSOCK
 930                         break;
 931 #else
 932                         continue;
 933 #endif
 934                 }
 935
 936                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 937                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 938                         c = &connections[(*index)++];
 939                         if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
 940                                 /* avoid deadlock */
 941                                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 942                                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 943                                 ldap_pvt_thread_mutex_lock( &connections_mutex );
 944                                 if ( c->c_struct_state != SLAP_C_USED ) {
 945                                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 946                                         c = NULL;
 947                                         continue;
 948                                 }
 949                         }
 950                         break;
 951                 }
 952
 953                 c_struct = connections[*index].c_struct_state;
 954                 if ( c_struct == SLAP_C_PENDING )
 955                         continue;
 956                 assert( c_struct == SLAP_C_UNUSED );
 957                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 958         }
 959
 960         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 961         return c;
 962 }
 963
 964 void connection_done( Connection *c )
 965 {
 966         assert( connections != NULL );
 967
 968         if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 969 }
 970
 971 /*
 972  * connection_activity - handle the request operation op on connection
 973  * conn.  This routine figures out what kind of operation it is and
 974  * calls the appropriate stub to handle it.
 975  */
 976
 977 #ifdef SLAPD_MONITOR
 978 /* FIXME: returns 0 in case of failure */
 979 #define INCR_OP_INITIATED(index) \
 980         do { \
 981                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 982                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
 983                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 984         } while (0)
 985 #define INCR_OP_COMPLETED(index) \
 986         do { \
 987                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 988                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 989                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
 990                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 991         } while (0)
 992 #else /* !SLAPD_MONITOR */
 993 #define INCR_OP_INITIATED(index) do { } while (0)
 994 #define INCR_OP_COMPLETED(index) \
 995         do { \
 996                 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
 997                 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
 998                 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
 999         } while (0)
1000 #endif /* !SLAPD_MONITOR */
1001
1002 /*
1003  * NOTE: keep in sync with enum in slapd.h
1004  */
1005 static BI_op_func *opfun[] = {
1006         do_bind,
1007         do_unbind,
1008         do_search,
1009         do_compare,
1010         do_modify,
1011         do_modrdn,
1012         do_add,
1013         do_delete,
1014         do_abandon,
1015         do_extended,
1016         NULL
1017 };
1018
1019 /* Counters are per-thread, not per-connection.
1020  */
1021 static void
1022 conn_counter_destroy( void *key, void *data )
1023 {
1024         slap_counters_t **prev, *sc;
1025
1026         ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1027         for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
1028                 prev = &sc->sc_next, sc = sc->sc_next ) {
1029                 if ( sc == data ) {
1030                         int i;
1031
1032                         *prev = sc->sc_next;
1033                         /* Copy data to main counter */
1034                         ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1035                         ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1036                         ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1037                         ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1038                         ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1039                         ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1040 #ifdef SLAPD_MONITOR
1041                         for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1042                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1043                                 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1044                         }
1045 #endif /* SLAPD_MONITOR */
1046                         slap_counters_destroy( sc );
1047                         ber_memfree_x( data, NULL );
1048                         break;
1049                 }
1050         }
1051         ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1052 }
1053
1054 static void
1055 conn_counter_init( Operation *op, void *ctx )
1056 {
1057         slap_counters_t *sc;
1058         void *vsc = NULL;
1059
1060         if ( ldap_pvt_thread_pool_getkey( ctx, conn_counter_init, &vsc, NULL ) || !vsc ) {
1061                 vsc = ch_malloc( sizeof( slap_counters_t ));
1062                 sc = vsc;
1063                 slap_counters_init( sc );
1064                 ldap_pvt_thread_pool_setkey( ctx, conn_counter_init, vsc,
1065                         conn_counter_destroy );
1066
1067                 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1068                 sc->sc_next = slap_counters.sc_next;
1069                 slap_counters.sc_next = sc;
1070                 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1071         }
1072         op->o_counters = vsc;
1073 }
1074
1075 static void *
1076 connection_operation( void *ctx, void *arg_v )
1077 {
1078         int rc = LDAP_OTHER;
1079         Operation *op = arg_v;
1080         SlapReply rs = {REP_RESULT};
1081         ber_tag_t tag = op->o_tag;
1082         slap_op_t opidx = SLAP_OP_LAST;
1083         Connection *conn = op->o_conn;
1084         void *memctx = NULL;
1085         void *memctx_null = NULL;
1086         ber_len_t memsiz;
1087
1088         conn_counter_init( op, ctx );
1089         ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1090         /* FIXME: returns 0 in case of failure */
1091         ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1092         ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1093
1094         op->o_threadctx = ctx;
1095         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1096
1097         switch ( tag ) {
1098         case LDAP_REQ_BIND:
1099         case LDAP_REQ_UNBIND:
1100         case LDAP_REQ_ADD:
1101         case LDAP_REQ_DELETE:
1102         case LDAP_REQ_MODDN:
1103         case LDAP_REQ_MODIFY:
1104         case LDAP_REQ_COMPARE:
1105         case LDAP_REQ_SEARCH:
1106         case LDAP_REQ_ABANDON:
1107         case LDAP_REQ_EXTENDED:
1108                 break;
1109         default:
1110                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1111                         "conn %lu unknown LDAP request 0x%lx\n",
1112                         conn->c_connid, tag, 0 );
1113                 op->o_tag = LBER_ERROR;
1114                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1115                 rs.sr_text = "unknown LDAP request";
1116                 send_ldap_disconnect( op, &rs );
1117                 rc = SLAPD_DISCONNECT;
1118                 goto operations_error;
1119         }
1120
1121         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1122                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1123                         "error: SASL bind in progress (tag=%ld).\n",
1124                         (long) tag, 0, 0 );
1125                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1126                         "SASL bind in progress" );
1127                 rc = LDAP_OPERATIONS_ERROR;
1128                 goto operations_error;
1129         }
1130
1131 #ifdef LDAP_X_TXN
1132         if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1133                 ( tag == LDAP_REQ_ADD ) ||
1134                 ( tag == LDAP_REQ_DELETE ) ||
1135                 ( tag == LDAP_REQ_MODIFY ) ||
1136                 ( tag == LDAP_REQ_MODRDN )))
1137         {
1138                 /* Disable SLAB allocator for all update operations
1139                         issued inside of a transaction */
1140                 op->o_tmpmemctx = NULL;
1141                 op->o_tmpmfuncs = &ch_mfuncs;
1142         } else
1143 #endif
1144         {
1145         /* We can use Thread-Local storage for most mallocs. We can
1146          * also use TL for ber parsing, but not on Add or Modify.
1147          */
1148 #if 0
1149         memsiz = ber_len( op->o_ber ) * 64;
1150         if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1151 #endif
1152         memsiz = SLAP_SLAB_SIZE;
1153
1154         memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1155         op->o_tmpmemctx = memctx;
1156         op->o_tmpmfuncs = &slap_sl_mfuncs;
1157         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1158                 /* Note - the ber and its buffer are already allocated from
1159                  * regular memory; this only affects subsequent mallocs that
1160                  * ber_scanf may invoke.
1161                  */
1162                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1163         }
1164         }
1165
1166         opidx = slap_req2op( tag );
1167         assert( opidx != SLAP_OP_LAST );
1168         INCR_OP_INITIATED( opidx );
1169         rc = (*(opfun[opidx]))( op, &rs );
1170
1171 operations_error:
1172         if ( rc == SLAPD_DISCONNECT ) {
1173                 tag = LBER_ERROR;
1174
1175         } else if ( opidx != SLAP_OP_LAST ) {
1176                 /* increment completed operations count
1177                  * only if operation was initiated
1178                  * and rc != SLAPD_DISCONNECT */
1179                 INCR_OP_COMPLETED( opidx );
1180         }
1181
1182         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1183                 if ( rc == SLAPD_ABANDON ) {
1184                         op->o_cancel = SLAP_CANCEL_ACK;
1185                 } else {
1186                         op->o_cancel = LDAP_TOO_LATE;
1187                 }
1188         }
1189
1190         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1191                 op->o_cancel != SLAP_CANCEL_DONE )
1192         {
1193                 ldap_pvt_thread_yield();
1194         }
1195
1196         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1197
1198         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1199
1200         LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1201         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1202         conn->c_n_ops_executing--;
1203         conn->c_n_ops_completed++;
1204
1205         switch( tag ) {
1206         case LBER_ERROR:
1207         case LDAP_REQ_UNBIND:
1208                 /* c_mutex is locked */
1209                 connection_closing( conn,
1210                         tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1211                 break;
1212         }
1213
1214         connection_resched( conn );
1215         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1216         slap_op_free( op, ctx );
1217         return NULL;
1218 }
1219
1220 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1221
1222 int connection_client_setup(
1223         ber_socket_t s,
1224         ldap_pvt_thread_start_t *func,
1225         void *arg )
1226 {
1227         Connection *c;
1228
1229         c = connection_init( s, (Listener *)&dummy_list, "", "",
1230                 CONN_IS_CLIENT, 0, NULL
1231                 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1232         if ( !c ) return -1;
1233
1234         c->c_clientfunc = func;
1235         c->c_clientarg = arg;
1236
1237         slapd_add_internal( s, 0 );
1238         slapd_set_read( s, 1 );
1239         return 0;
1240 }
1241
1242 void connection_client_enable(
1243         ber_socket_t s )
1244 {
1245         slapd_set_read( s, 1 );
1246 }
1247
1248 void connection_client_stop(
1249         ber_socket_t s )
1250 {
1251         Connection *c;
1252         Sockbuf *sb;
1253
1254         /* get (locked) connection */
1255         c = connection_get( s );
1256
1257         assert( c->c_conn_state == SLAP_C_CLIENT );
1258
1259         c->c_listener = NULL;
1260         c->c_conn_state = SLAP_C_INVALID;
1261         c->c_struct_state = SLAP_C_UNUSED;
1262         c->c_sd = AC_SOCKET_INVALID;
1263         c->c_close_reason = "?";                        /* should never be needed */
1264         sb = c->c_sb;
1265         c->c_sb = ber_sockbuf_alloc( );
1266         {
1267                 ber_len_t max = sockbuf_max_incoming;
1268                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1269         }
1270         slapd_remove( s, sb, 0, 1, 0 );
1271
1272         connection_return( c );
1273 }
1274
1275 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1276
1277 static void* connection_read_thread( void* ctx, void* argv )
1278 {
1279         int rc ;
1280         conn_readinfo cri = { NULL, NULL, NULL, 0 };
1281         ber_socket_t s = (long)argv;
1282
1283         /*
1284          * read incoming LDAP requests. If there is more than one,
1285          * the first one is returned with new_op
1286          */
1287         cri.ctx = ctx;
1288         if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1289                 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1290                 return (void*)(long)rc;
1291         }
1292
1293         /* execute a single queued request in the same thread */
1294         if( cri.op && !cri.nullop ) {
1295                 rc = (long)connection_operation( ctx, cri.op );
1296         } else if ( cri.func ) {
1297                 rc = (long)cri.func( ctx, cri.arg );
1298         }
1299
1300         return (void*)(long)rc;
1301 }
1302
1303 int connection_read_activate( ber_socket_t s )
1304 {
1305         int rc;
1306
1307         /*
1308          * suspend reading on this file descriptor until a connection processing
1309          * thread reads data on it. Otherwise the listener thread will repeatedly
1310          * submit the same event on it to the pool.
1311          */
1312         rc = slapd_clr_read( s, 0 );
1313         if ( rc )
1314                 return rc;
1315
1316         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1317                 connection_read_thread, (void *)(long)s );
1318
1319         if( rc != 0 ) {
1320                 Debug( LDAP_DEBUG_ANY,
1321                         "connection_read_activate(%d): submit failed (%d)\n",
1322                         s, rc, 0 );
1323         }
1324
1325         return rc;
1326 }
1327
1328 static int
1329 connection_read( ber_socket_t s, conn_readinfo *cri )
1330 {
1331         int rc = 0;
1332         Connection *c;
1333
1334         assert( connections != NULL );
1335
1336         /* get (locked) connection */
1337         c = connection_get( s );
1338
1339         if( c == NULL ) {
1340                 Debug( LDAP_DEBUG_ANY,
1341                         "connection_read(%ld): no connection!\n",
1342                         (long) s, 0, 0 );
1343
1344                 return -1;
1345         }
1346
1347         c->c_n_read++;
1348
1349         if( c->c_conn_state == SLAP_C_CLOSING ) {
1350                 Debug( LDAP_DEBUG_TRACE,
1351                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1352                         s, c->c_connid, 0 );
1353                 connection_return( c );
1354                 return 0;
1355         }
1356
1357         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1358                 cri->func = c->c_clientfunc;
1359                 cri->arg = c->c_clientarg;
1360                 /* read should already be cleared */
1361                 connection_return( c );
1362                 return 0;
1363         }
1364
1365         Debug( LDAP_DEBUG_TRACE,
1366                 "connection_read(%d): checking for input on id=%lu\n",
1367                 s, c->c_connid, 0 );
1368
1369 #ifdef HAVE_TLS
1370         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1371                 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1372                 if ( rc < 0 ) {
1373                         Debug( LDAP_DEBUG_TRACE,
1374                                 "connection_read(%d): TLS accept failure "
1375                                 "error=%d id=%lu, closing\n",
1376                                 s, rc, c->c_connid );
1377
1378                         c->c_needs_tls_accept = 0;
1379                         /* c_mutex is locked */
1380                         connection_closing( c, "TLS negotiation failure" );
1381                         connection_close( c );
1382                         connection_return( c );
1383                         return 0;
1384
1385                 } else if ( rc == 0 ) {
1386                         void *ssl;
1387                         struct berval authid = BER_BVNULL;
1388
1389                         c->c_needs_tls_accept = 0;
1390
1391                         /* we need to let SASL know */
1392                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1393
1394                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1395                         if( c->c_tls_ssf > c->c_ssf ) {
1396                                 c->c_ssf = c->c_tls_ssf;
1397                         }
1398
1399                         rc = dnX509peerNormalize( ssl, &authid );
1400                         if ( rc != LDAP_SUCCESS ) {
1401                                 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1402                                         "unable to get TLS client DN, error=%d id=%lu\n",
1403                                         s, rc, c->c_connid );
1404                         }
1405                         Statslog( LDAP_DEBUG_STATS,
1406                                 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1407                             c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1408                         slap_sasl_external( c, c->c_tls_ssf, &authid );
1409                         if ( authid.bv_val ) free( authid.bv_val );
1410                 }
1411
1412                 /* if success and data is ready, fall thru to data input loop */
1413                 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1414                 {
1415                         slapd_set_read( s, 1 );
1416                         connection_return( c );
1417                         return 0;
1418                 }
1419         }
1420 #endif
1421
1422 #ifdef HAVE_CYRUS_SASL
1423         if ( c->c_sasl_layers ) {
1424                 /* If previous layer is not removed yet, give up for now */
1425                 if ( !c->c_sasl_sockctx ) {
1426                         slapd_set_read( s, 1 );
1427                         connection_return( c );
1428                         return 0;
1429                 }
1430
1431                 c->c_sasl_layers = 0;
1432
1433                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1434                 if( rc != LDAP_SUCCESS ) {
1435                         Debug( LDAP_DEBUG_TRACE,
1436                                 "connection_read(%d): SASL install error "
1437                                 "error=%d id=%lu, closing\n",
1438                                 s, rc, c->c_connid );
1439
1440                         /* c_mutex is locked */
1441                         connection_closing( c, "SASL layer install failure" );
1442                         connection_close( c );
1443                         connection_return( c );
1444                         return 0;
1445                 }
1446         }
1447 #endif
1448
1449 #define CONNECTION_INPUT_LOOP 1
1450 /* #define      DATA_READY_LOOP 1 */
1451
1452         do {
1453                 /* How do we do this without getting into a busy loop ? */
1454                 rc = connection_input( c, cri );
1455         }
1456 #ifdef DATA_READY_LOOP
1457         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1458 #elif defined CONNECTION_INPUT_LOOP
1459         while(!rc);
1460 #else
1461         while(0);
1462 #endif
1463
1464         if( rc < 0 ) {
1465                 Debug( LDAP_DEBUG_CONNS,
1466                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1467                         s, rc, c->c_connid );
1468
1469                 /* c_mutex is locked */
1470                 connection_closing( c, conn_lost_str );
1471                 connection_close( c );
1472                 connection_return( c );
1473                 return 0;
1474         }
1475
1476         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1477                 slapd_set_write( s, 0 );
1478         }
1479
1480         slapd_set_read( s, 1 );
1481         connection_return( c );
1482
1483         return 0;
1484 }
1485
1486 static int
1487 connection_input( Connection *conn , conn_readinfo *cri )
1488 {
1489         Operation *op;
1490         ber_tag_t       tag;
1491         ber_len_t       len;
1492         ber_int_t       msgid;
1493         BerElement      *ber;
1494         int             rc;
1495 #ifdef LDAP_CONNECTIONLESS
1496         Sockaddr        peeraddr;
1497         char            *cdn = NULL;
1498 #endif
1499         char *defer = NULL;
1500         void *ctx;
1501
1502         if ( conn->c_currentber == NULL &&
1503                 ( conn->c_currentber = ber_alloc()) == NULL )
1504         {
1505                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1506                 return -1;
1507         }
1508
1509         sock_errset(0);
1510
1511 #ifdef LDAP_CONNECTIONLESS
1512         if ( conn->c_is_udp ) {
1513                 char peername[sizeof("IP=255.255.255.255:65336")];
1514
1515                 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1516                 if (len != sizeof(struct sockaddr)) return 1;
1517
1518                 sprintf( peername, "IP=%s:%d",
1519                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1520                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1521                 Statslog( LDAP_DEBUG_STATS,
1522                         "conn=%lu UDP request from %s (%s) accepted.\n",
1523                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1524         }
1525 #endif
1526
1527         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1528         if ( tag != LDAP_TAG_MESSAGE ) {
1529                 int err = sock_errno();
1530
1531                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1532                         /* log, close and send error */
1533                         Debug( LDAP_DEBUG_TRACE,
1534                                 "ber_get_next on fd %d failed errno=%d (%s)\n",
1535                         conn->c_sd, err, sock_errstr(err) );
1536                         ber_free( conn->c_currentber, 1 );
1537                         conn->c_currentber = NULL;
1538
1539                         return -2;
1540                 }
1541                 return 1;
1542         }
1543
1544         ber = conn->c_currentber;
1545         conn->c_currentber = NULL;
1546
1547         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1548                 /* log, close and send error */
1549                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1550                 ber_free( ber, 1 );
1551                 return -1;
1552         }
1553
1554         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1555                 /* log, close and send error */
1556                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1557                 ber_free( ber, 1 );
1558
1559                 return -1;
1560         }
1561
1562 #ifdef LDAP_CONNECTIONLESS
1563         if( conn->c_is_udp ) {
1564                 if( tag == LBER_OCTETSTRING ) {
1565                         ber_get_stringa( ber, &cdn );
1566                         tag = ber_peek_tag(ber, &len);
1567                 }
1568                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1569                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1570                         ber_free( ber, 1 );
1571                         return 0;
1572                 }
1573         }
1574 #endif
1575
1576         if(tag == LDAP_REQ_BIND) {
1577                 /* immediately abandon all existing operations upon BIND */
1578                 connection_abandon( conn );
1579         }
1580
1581         ctx = cri->ctx;
1582         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1583
1584         op->o_conn = conn;
1585         /* clear state if the connection is being reused from inactive */
1586         if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1587                 memset( &conn->c_pagedresults_state, 0,
1588                         sizeof( conn->c_pagedresults_state ) );
1589         }
1590
1591         op->o_res_ber = NULL;
1592
1593 #ifdef LDAP_CONNECTIONLESS
1594         if (conn->c_is_udp) {
1595                 if ( cdn ) {
1596                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1597                         op->o_protocol = LDAP_VERSION2;
1598                 }
1599                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1600                 if (op->o_res_ber == NULL) return 1;
1601
1602                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1603                         sizeof(struct sockaddr), 0 );
1604
1605                 if (rc != sizeof(struct sockaddr)) {
1606                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1607                         return 1;
1608                 }
1609
1610                 if (op->o_protocol == LDAP_VERSION2) {
1611                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1612                         if (rc == -1) {
1613                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1614                                 return rc;
1615                         }
1616                 }
1617         }
1618 #endif /* LDAP_CONNECTIONLESS */
1619
1620         rc = 0;
1621
1622         /* Don't process requests when the conn is in the middle of a
1623          * Bind, or if it's closing. Also, don't let any single conn
1624          * use up all the available threads, and don't execute if we're
1625          * currently blocked on output. And don't execute if there are
1626          * already pending ops, let them go first.  Abandon operations
1627          * get exceptions to some, but not all, cases.
1628          */
1629         switch( tag ){
1630         default:
1631                 /* Abandon and Unbind are exempt from these checks */
1632                 if (conn->c_conn_state == SLAP_C_CLOSING) {
1633                         defer = "closing";
1634                         break;
1635                 } else if (conn->c_writewaiter) {
1636                         defer = "awaiting write";
1637                         break;
1638                 } else if (conn->c_n_ops_pending) {
1639                         defer = "pending operations";
1640                         break;
1641                 }
1642                 /* FALLTHRU */
1643         case LDAP_REQ_ABANDON:
1644                 /* Unbind is exempt from these checks */
1645                 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1646                         defer = "too many executing";
1647                         break;
1648                 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1649                         defer = "binding";
1650                         break;
1651                 }
1652                 /* FALLTHRU */
1653         case LDAP_REQ_UNBIND:
1654                 break;
1655         }
1656
1657         if( defer ) {
1658                 int max = conn->c_dn.bv_len
1659                         ? slap_conn_max_pending_auth
1660                         : slap_conn_max_pending;
1661
1662                 Debug( LDAP_DEBUG_ANY,
1663                         "connection_input: conn=%lu deferring operation: %s\n",
1664                         conn->c_connid, defer, 0 );
1665                 conn->c_n_ops_pending++;
1666                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1667                 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1668
1669         } else {
1670                 conn->c_n_ops_executing++;
1671
1672                 /*
1673                  * The first op will be processed in the same thread context,
1674                  * as long as there is only one op total.
1675                  * Subsequent ops will be submitted to the pool by
1676                  * calling connection_op_activate()
1677                  */
1678                 if ( cri->op == NULL ) {
1679                         /* the first incoming request */
1680                         connection_op_queue( op );
1681                         cri->op = op;
1682                 } else {
1683                         if ( !cri->nullop ) {
1684                                 cri->nullop = 1;
1685                                 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1686                                         connection_operation, (void *) cri->op );
1687                         }
1688                         connection_op_activate( op );
1689                 }
1690         }
1691
1692 #ifdef NO_THREADS
1693         if ( conn->c_struct_state != SLAP_C_USED ) {
1694                 /* connection must have got closed underneath us */
1695                 return 1;
1696         }
1697 #endif
1698
1699         assert( conn->c_struct_state == SLAP_C_USED );
1700         return rc;
1701 }
1702
1703 static int
1704 connection_resched( Connection *conn )
1705 {
1706         Operation *op;
1707
1708         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1709                 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1710                         "attempting closing conn=%lu sd=%d\n",
1711                         conn->c_connid, conn->c_sd, 0 );
1712                 connection_close( conn );
1713                 return 0;
1714         }
1715
1716         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1717                 /* other states need different handling */
1718                 return 0;
1719         }
1720
1721         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1722                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1723
1724                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1725                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1726
1727                 /* pending operations should not be marked for abandonment */
1728                 assert(!op->o_abandon);
1729
1730                 conn->c_n_ops_pending--;
1731                 conn->c_n_ops_executing++;
1732
1733                 connection_op_activate( op );
1734
1735                 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1736         }
1737         return 0;
1738 }
1739
1740 static void
1741 connection_init_log_prefix( Operation *op )
1742 {
1743         if ( op->o_connid == (unsigned long)(-1) ) {
1744                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1745                         "conn=-1 op=%lu", op->o_opid );
1746
1747         } else {
1748                 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1749                         "conn=%lu op=%lu", op->o_connid, op->o_opid );
1750         }
1751 }
1752
1753 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1754 {
1755         op->o_conn->c_sasl_bindop = NULL;
1756
1757         ch_free( op->o_callback );
1758         op->o_callback = NULL;
1759
1760         return SLAP_CB_CONTINUE;
1761 }
1762
1763 static int connection_bind_cb( Operation *op, SlapReply *rs )
1764 {
1765         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1766         if ( op->o_conn->c_conn_state == SLAP_C_BINDING )
1767                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1768         op->o_conn->c_sasl_bind_in_progress =
1769                 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1770
1771         /* Moved here from bind.c due to ITS#4158 */
1772         op->o_conn->c_sasl_bindop = NULL;
1773         if ( op->orb_method == LDAP_AUTH_SASL ) {
1774                 if( rs->sr_err == LDAP_SUCCESS ) {
1775                         ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1776                         if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1777                                 /* edn is always normalized already */
1778                                 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1779                         }
1780                         op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1781                         BER_BVZERO( &op->orb_edn );
1782                         op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1783                         BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1784
1785                         op->o_conn->c_sasl_ssf = op->orb_ssf;
1786                         if( op->orb_ssf > op->o_conn->c_ssf ) {
1787                                 op->o_conn->c_ssf = op->orb_ssf;
1788                         }
1789
1790                         if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1791                                 ber_len_t max = sockbuf_max_incoming_auth;
1792                                 ber_sockbuf_ctrl( op->o_conn->c_sb,
1793                                         LBER_SB_OPT_SET_MAX_INCOMING, &max );
1794                         }
1795
1796                         /* log authorization identity */
1797                         Statslog( LDAP_DEBUG_STATS,
1798                                 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1799                                 op->o_log_prefix,
1800                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1801                                 op->o_conn->c_authmech.bv_val,
1802                                 op->orb_ssf, op->o_conn->c_ssf );
1803
1804                         Debug( LDAP_DEBUG_TRACE,
1805                                 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1806                                 op->o_conn->c_authmech.bv_val,
1807                                 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1808                                 op->orb_ssf );
1809
1810                 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1811                         if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1812                                 free( op->o_conn->c_sasl_bind_mech.bv_val );
1813                                 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1814                         }
1815                 }
1816         }
1817         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1818
1819         ch_free( op->o_callback );
1820         op->o_callback = NULL;
1821
1822         return SLAP_CB_CONTINUE;
1823 }
1824
1825 static void connection_op_queue( Operation *op )
1826 {
1827         ber_tag_t tag = op->o_tag;
1828
1829         if (tag == LDAP_REQ_BIND) {
1830                 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1831                 sc->sc_response = connection_bind_cb;
1832                 sc->sc_cleanup = connection_bind_cleanup_cb;
1833                 sc->sc_next = op->o_callback;
1834                 op->o_callback = sc;
1835                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1836         }
1837
1838         if (!op->o_dn.bv_len) {
1839                 op->o_authz = op->o_conn->c_authz;
1840                 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1841                         ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1842                         ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1843                 } else {
1844                         ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1845                         ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1846                 }
1847         }
1848
1849         op->o_authtype = op->o_conn->c_authtype;
1850         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1851
1852         if (!op->o_protocol) {
1853                 op->o_protocol = op->o_conn->c_protocol
1854                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1855         }
1856
1857         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1858                 op->o_protocol > LDAP_VERSION2)
1859         {
1860                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1861         }
1862
1863         op->o_connid = op->o_conn->c_connid;
1864         connection_init_log_prefix( op );
1865
1866         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1867 }
1868
1869 static int connection_op_activate( Operation *op )
1870 {
1871         int rc;
1872
1873         connection_op_queue( op );
1874
1875         rc = ldap_pvt_thread_pool_submit( &connection_pool,
1876                 connection_operation, (void *) op );
1877
1878         if ( rc != 0 ) {
1879                 Debug( LDAP_DEBUG_ANY,
1880                         "connection_op_activate: submit failed (%d) for conn=%lu\n",
1881                         rc, op->o_connid, 0 );
1882                 /* should move op to pending list */
1883         }
1884
1885         return rc;
1886 }
1887
1888 int connection_write(ber_socket_t s)
1889 {
1890         Connection *c;
1891         Operation *op;
1892
1893         assert( connections != NULL );
1894
1895         slapd_clr_write( s, 0 );
1896
1897         c = connection_get( s );
1898         if( c == NULL ) {
1899                 Debug( LDAP_DEBUG_ANY,
1900                         "connection_write(%ld): no connection!\n",
1901                         (long)s, 0, 0 );
1902                 return -1;
1903         }
1904
1905         c->c_n_write++;
1906
1907         Debug( LDAP_DEBUG_TRACE,
1908                 "connection_write(%d): waking output for id=%lu\n",
1909                 s, c->c_connid, 0 );
1910         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1911
1912         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1913                 slapd_set_read( s, 1 );
1914         }
1915         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1916                 slapd_set_write( s, 1 );
1917         }
1918
1919         /* If there are ops pending because of a writewaiter,
1920          * start one up.
1921          */
1922         while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1923                 if ( !c->c_writewaiter ) break;
1924                 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1925
1926                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1927                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1928
1929                 /* pending operations should not be marked for abandonment */
1930                 assert(!op->o_abandon);
1931
1932                 c->c_n_ops_pending--;
1933                 c->c_n_ops_executing++;
1934
1935                 connection_op_activate( op );
1936
1937                 break;
1938         }
1939
1940         connection_return( c );
1941         return 0;
1942 }
1943
1944 #ifdef LDAP_SLAPI
1945 typedef struct conn_fake_extblock {
1946         void *eb_conn;
1947         void *eb_op;
1948 } conn_fake_extblock;
1949
1950 static void
1951 connection_fake_destroy(
1952         void *key,
1953         void *data )
1954 {
1955         Connection conn = {0};
1956         Operation op = {0};
1957         Opheader ohdr = {0};
1958
1959         conn_fake_extblock *eb = data;
1960
1961         op.o_hdr = &ohdr;
1962         op.o_hdr->oh_extensions = eb->eb_op;
1963         conn.c_extensions = eb->eb_conn;
1964         op.o_conn = &conn;
1965         conn.c_connid = -1;
1966         op.o_connid = -1;
1967
1968         ber_memfree_x( eb, NULL );
1969         slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1970         slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1971 }
1972 #endif
1973
1974 void
1975 connection_fake_init(
1976         Connection *conn,
1977         OperationBuffer *opbuf,
1978         void *ctx )
1979 {
1980         connection_fake_init2( conn, opbuf, ctx, 1 );
1981 }
1982
1983 void
1984 connection_fake_init2(
1985         Connection *conn,
1986         OperationBuffer *opbuf,
1987         void *ctx,
1988         int newmem )
1989 {
1990         Operation *op = (Operation *) opbuf;
1991
1992         conn->c_connid = -1;
1993         conn->c_conn_idx = -1;
1994         conn->c_send_ldap_result = slap_send_ldap_result;
1995         conn->c_send_search_entry = slap_send_search_entry;
1996         conn->c_send_search_reference = slap_send_search_reference;
1997         conn->c_listener = (Listener *)&dummy_list;
1998         conn->c_peer_domain = slap_empty_bv;
1999         conn->c_peer_name = slap_empty_bv;
2000
2001         memset( opbuf, 0, sizeof( *opbuf ));
2002         op->o_hdr = &opbuf->ob_hdr;
2003         op->o_controls = opbuf->ob_controls;
2004
2005         /* set memory context */
2006         op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2007                 newmem );
2008         op->o_tmpmfuncs = &slap_sl_mfuncs;
2009         op->o_threadctx = ctx;
2010         op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2011
2012         op->o_counters = &slap_counters;
2013         op->o_conn = conn;
2014         op->o_connid = op->o_conn->c_connid;
2015         connection_init_log_prefix( op );
2016
2017 #ifdef LDAP_SLAPI
2018         if ( slapi_plugins_used ) {
2019                 conn_fake_extblock *eb;
2020                 void *ebx = NULL;
2021
2022                 /* Use thread keys to make sure these eventually get cleaned up */
2023                 if ( ldap_pvt_thread_pool_getkey( ctx, connection_fake_init, &ebx,
2024                         NULL )) {
2025                         eb = ch_malloc( sizeof( *eb ));
2026                         slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2027                         slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2028                         eb->eb_conn = conn->c_extensions;
2029                         eb->eb_op = op->o_hdr->oh_extensions;
2030                         ldap_pvt_thread_pool_setkey( ctx, connection_fake_init, eb,
2031                                 connection_fake_destroy );
2032                 } else {
2033                         eb = ebx;
2034                         conn->c_extensions = eb->eb_conn;
2035                         op->o_hdr->oh_extensions = eb->eb_op;
2036                 }
2037         }
2038 #endif /* LDAP_SLAPI */
2039
2040         slap_op_time( &op->o_time, &op->o_tincr );
2041 }
2042
2043 void
2044 connection_assign_nextid( Connection *conn )
2045 {
2046         ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2047         conn->c_connid = conn_nextid++;
2048         ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
2049 }