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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <limits.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/signal.h>
  15 #include <ac/string.h>
  16 #include <ac/time.h>
  17
  18 #include "ldap_pvt.h"
  19 #include "lutil.h"
  20 #include "slap.h"
  21
  22 /* protected by connections_mutex */
  23 static ldap_pvt_thread_mutex_t connections_mutex;
  24 static Connection *connections = NULL;
  25 static unsigned long conn_nextid = 0;
  26
  27 /* structure state (protected by connections_mutex) */
  28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  29 #define SLAP_C_UNUSED                   0x01
  30 #define SLAP_C_USED                             0x02
  31
  32 /* connection state (protected by c_mutex ) */
  33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  36 #define SLAP_C_BINDING                  0x03    /* binding */
  37 #define SLAP_C_CLOSING                  0x04    /* closing */
  38
  39 const char *
  40 connection_state2str( int state )
  41 {
  42         switch( state ) {
  43         case SLAP_C_INVALID:    return "!";
  44         case SLAP_C_INACTIVE:   return "|";
  45         case SLAP_C_ACTIVE:             return "";
  46         case SLAP_C_BINDING:    return "B";
  47         case SLAP_C_CLOSING:    return "C";
  48         }
  49
  50         return "?";
  51 }
  52
  53 static Connection* connection_get( ber_socket_t s );
  54
  55 static int connection_input( Connection *c );
  56 static void connection_close( Connection *c );
  57
  58 static int connection_op_activate( Connection *conn, Operation *op );
  59 static int connection_resched( Connection *conn );
  60 static void connection_abandon( Connection *conn );
  61 static void connection_destroy( Connection *c );
  62
  63 struct co_arg {
  64         Connection      *co_conn;
  65         Operation       *co_op;
  66 };
  67
  68 /*
  69  * Initialize connection management infrastructure.
  70  */
  71 int connections_init(void)
  72 {
  73         assert( connections == NULL );
  74
  75         if( connections != NULL) {
  76 #ifdef NEW_LOGGING
  77                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  78                            "connections_init:  already initialized.\n" ));
  79 #else
  80                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  81                         0, 0, 0 );
  82 #endif
  83                 return -1;
  84         }
  85
  86         /* should check return of every call */
  87         ldap_pvt_thread_mutex_init( &connections_mutex );
  88
  89         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  90
  91         if( connections == NULL ) {
  92 #ifdef NEW_LOGGING
  93                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  94                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  95                            dtblsize, (long) sizeof(Connection) ));
  96 #else
  97                 Debug( LDAP_DEBUG_ANY,
  98                         "connections_init: allocation (%d*%ld) of connection array failed\n",
  99                         dtblsize, (long) sizeof(Connection), 0 );
 100 #endif
 101                 return -1;
 102         }
 103
 104     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 105     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 106
 107         /*
 108          * per entry initialization of the Connection array initialization
 109          * will be done by connection_init()
 110          */
 111
 112         return 0;
 113 }
 114
 115 /*
 116  * Destroy connection management infrastructure.
 117  */
 118 int connections_destroy(void)
 119 {
 120         ber_socket_t i;
 121
 122         /* should check return of every call */
 123
 124         if( connections == NULL) {
 125 #ifdef NEW_LOGGING
 126                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 127                            "connections_destroy: nothing to destroy.\n"));
 128 #else
 129                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 130                         0, 0, 0 );
 131 #endif
 132                 return -1;
 133         }
 134
 135         for ( i = 0; i < dtblsize; i++ ) {
 136                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 137                         ber_sockbuf_free( connections[i].c_sb );
 138                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 140                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 141                 }
 142         }
 143
 144         free( connections );
 145         connections = NULL;
 146
 147         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 148         return 0;
 149 }
 150
 151 /*
 152  * shutdown all connections
 153  */
 154 int connections_shutdown(void)
 155 {
 156         ber_socket_t i;
 157
 158         ldap_pvt_thread_mutex_lock( &connections_mutex );
 159
 160         for ( i = 0; i < dtblsize; i++ ) {
 161                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 162                         continue;
 163                 }
 164
 165                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 166
 167                 /* connections_mutex and c_mutex are locked */
 168                 connection_closing( &connections[i] );
 169                 connection_close( &connections[i] );
 170
 171                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 172         }
 173
 174         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 175
 176         return 0;
 177 }
 178
 179 /*
 180  * Timeout idle connections.
 181  */
 182 int connections_timeout_idle(time_t now)
 183 {
 184         int i = 0;
 185         int connindex;
 186         Connection* c;
 187
 188         for( c = connection_first( &connindex );
 189                 c != NULL;
 190                 c = connection_next( c, &connindex ) )
 191         {
 192                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 193                         /* close it */
 194                         connection_closing( c );
 195                         connection_close( c );
 196                         i++;
 197                 }
 198         }
 199         connection_done( c );
 200
 201         return i;
 202 }
 203
 204 static Connection* connection_get( ber_socket_t s )
 205 {
 206         /* connections_mutex should be locked by caller */
 207
 208         Connection *c;
 209
 210 #ifdef NEW_LOGGING
 211         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 212                    "connection_get: socket %ld\n", (long)s ));
 213 #else
 214         Debug( LDAP_DEBUG_ARGS,
 215                 "connection_get(%ld)\n",
 216                 (long) s, 0, 0 );
 217 #endif
 218
 219         assert( connections != NULL );
 220
 221         if(s == AC_SOCKET_INVALID) {
 222                 return NULL;
 223         }
 224
 225 #ifndef HAVE_WINSOCK
 226         c = &connections[s];
 227
 228         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 229
 230 #else
 231         c = NULL;
 232         {
 233                 ber_socket_t i, sd;
 234
 235                 for(i=0; i<dtblsize; i++) {
 236                         ber_sockbuf_ctrl( connections[i].c_sb,
 237                                 LBER_SB_OPT_GET_FD, &sd );
 238
 239                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 240                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 241                                 assert( connections[i].c_sb == 0 );
 242                                 break;
 243                         }
 244
 245                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 246                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 247                                 assert( sd == AC_SOCKET_INVALID );
 248                                 continue;
 249                         }
 250
 251                         /* state can actually change from used -> unused by resched,
 252                          * so don't assert details here.
 253                          */
 254
 255                         if( sd == s ) {
 256                                 c = &connections[i];
 257                                 break;
 258                         }
 259                 }
 260         }
 261 #endif
 262
 263         if( c != NULL ) {
 264                 ber_socket_t    sd;
 265
 266                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 267
 268                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 269                 if( c->c_struct_state != SLAP_C_USED ) {
 270                         /* connection must have been closed due to resched */
 271
 272                         assert( c->c_conn_state == SLAP_C_INVALID );
 273                         assert( sd == AC_SOCKET_INVALID );
 274
 275 #ifdef NEW_LOGGING
 276                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 277                                    "connection_get:  connection %d not used\n", s ));
 278 #else
 279                         Debug( LDAP_DEBUG_TRACE,
 280                                 "connection_get(%d): connection not used\n",
 281                                 s, 0, 0 );
 282 #endif
 283
 284                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 285                         return NULL;
 286                 }
 287
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 290                            "connection_get: get for %d got connid %ld\n",s, c->c_connid ));
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE,
 293                         "connection_get(%d): got connid=%ld\n",
 294                         s, c->c_connid, 0 );
 295 #endif
 296
 297                 c->c_n_get++;
 298
 299                 assert( c->c_struct_state == SLAP_C_USED );
 300                 assert( c->c_conn_state != SLAP_C_INVALID );
 301                 assert( sd != AC_SOCKET_INVALID );
 302
 303         c->c_activitytime = slap_get_time();
 304         }
 305
 306         return c;
 307 }
 308
 309 static void connection_return( Connection *c )
 310 {
 311         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 312 }
 313
 314 long connection_init(
 315         ber_socket_t s,
 316         const char* url,
 317         const char* dnsname,
 318         const char* peername,
 319         const char* sockname,
 320         int use_tls,
 321         slap_ssf_t ssf,
 322         const char *authid )
 323 {
 324         unsigned long id;
 325         Connection *c;
 326
 327         assert( connections != NULL );
 328
 329         assert( dnsname != NULL );
 330         assert( peername != NULL );
 331         assert( sockname != NULL );
 332
 333 #ifndef HAVE_TLS
 334         assert( !use_tls );
 335 #endif
 336
 337         if( s == AC_SOCKET_INVALID ) {
 338 #ifdef NEW_LOGGING
 339                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 340                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 341 #else
 342                 Debug( LDAP_DEBUG_ANY,
 343                        "connection_init(%ld): invalid.\n",
 344                        (long) s, 0, 0 );
 345 #endif
 346                 return -1;
 347         }
 348
 349         assert( s >= 0 );
 350 #ifndef HAVE_WINSOCK
 351         assert( s < dtblsize );
 352 #endif
 353
 354         ldap_pvt_thread_mutex_lock( &connections_mutex );
 355
 356 #ifndef HAVE_WINSOCK
 357         c = &connections[s];
 358
 359 #else
 360         {
 361                 unsigned int i;
 362
 363                 c = NULL;
 364
 365         for( i=0; i < dtblsize; i++) {
 366                 ber_socket_t    sd;
 367
 368             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 369                 assert( connections[i].c_sb == 0 );
 370                 c = &connections[i];
 371                 break;
 372             }
 373
 374                         sd = AC_SOCKET_INVALID;
 375                         if (connections[i].c_sb != NULL)
 376                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 377
 378             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 379                 assert( sd == AC_SOCKET_INVALID );
 380                 c = &connections[i];
 381                 break;
 382             }
 383
 384             assert( connections[i].c_struct_state == SLAP_C_USED );
 385             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 386             assert( sd != AC_SOCKET_INVALID );
 387         }
 388
 389         if( c == NULL ) {
 390 #ifdef NEW_LOGGING
 391                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 392                            "connection_init: skt %d      connection table full (%d/%d)\n",
 393                            s, i, dtblsize ));
 394 #else
 395                 Debug( LDAP_DEBUG_ANY,
 396                                 "connection_init(%d): connection table full (%d/%d)\n",
 397                                 s, i, dtblsize);
 398 #endif
 399             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 400             return -1;
 401         }
 402     }
 403 #endif
 404
 405     assert( c != NULL );
 406
 407         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 408                 c->c_authmech = NULL;
 409                 c->c_dn = NULL;
 410                 c->c_cdn = NULL;
 411
 412                 c->c_listener_url = NULL;
 413                 c->c_peer_domain = NULL;
 414                 c->c_peer_name = NULL;
 415                 c->c_sock_name = NULL;
 416
 417                 c->c_ops = NULL;
 418                 c->c_pending_ops = NULL;
 419
 420                 c->c_sasl_bind_mech = NULL;
 421                 c->c_sasl_context = NULL;
 422                 c->c_sasl_extra = NULL;
 423
 424                 c->c_sb = ber_sockbuf_alloc( );
 425
 426                 {
 427                         ber_len_t max = sockbuf_max_incoming;
 428                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 429                 }
 430
 431                 c->c_currentber = NULL;
 432
 433                 /* should check status of thread calls */
 434                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 435                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 436                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 437
 438                 c->c_struct_state = SLAP_C_UNUSED;
 439         }
 440
 441     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 442
 443     assert( c->c_struct_state == SLAP_C_UNUSED );
 444         assert( c->c_authmech == NULL );
 445     assert(     c->c_dn == NULL );
 446     assert(     c->c_cdn == NULL );
 447     assert( c->c_listener_url == NULL );
 448     assert( c->c_peer_domain == NULL );
 449     assert( c->c_peer_name == NULL );
 450     assert( c->c_sock_name == NULL );
 451     assert( c->c_ops == NULL );
 452     assert( c->c_pending_ops == NULL );
 453         assert( c->c_sasl_bind_mech == NULL );
 454         assert( c->c_sasl_context == NULL );
 455         assert( c->c_sasl_extra == NULL );
 456         assert( c->c_currentber == NULL );
 457
 458         c->c_listener_url = ch_strdup( url  );
 459         c->c_peer_domain = ch_strdup( dnsname  );
 460     c->c_peer_name = ch_strdup( peername  );
 461     c->c_sock_name = ch_strdup( sockname );
 462
 463     c->c_n_ops_received = 0;
 464     c->c_n_ops_executing = 0;
 465     c->c_n_ops_pending = 0;
 466     c->c_n_ops_completed = 0;
 467
 468         c->c_n_get = 0;
 469         c->c_n_read = 0;
 470         c->c_n_write = 0;
 471
 472         /* set to zero until bind, implies LDAP_VERSION3 */
 473         c->c_protocol = 0;
 474
 475     c->c_activitytime = c->c_starttime = slap_get_time();
 476
 477 #ifdef LDAP_DEBUG
 478         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 479                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 480 #endif
 481         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 482                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 483         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 484                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 485
 486 #ifdef LDAP_DEBUG
 487         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 488                 INT_MAX, (void*)"ldap_" );
 489 #endif
 490
 491         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 492                 c /* non-NULL */ ) < 0 )
 493         {
 494 #ifdef NEW_LOGGING
 495                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 496                            "connection_init: conn %d  set nonblocking failed\n",
 497                            c->c_connid ));
 498 #else
 499                 Debug( LDAP_DEBUG_ANY,
 500                         "connection_init(%d, %s): set nonblocking failed\n",
 501                         s, c->c_peer_name, 0 );
 502 #endif
 503         }
 504
 505     id = c->c_connid = conn_nextid++;
 506
 507     c->c_conn_state = SLAP_C_INACTIVE;
 508     c->c_struct_state = SLAP_C_USED;
 509
 510         c->c_ssf = c->c_transport_ssf = ssf;
 511         c->c_tls_ssf = 0;
 512
 513 #ifdef HAVE_TLS
 514     if ( use_tls ) {
 515             c->c_is_tls = 1;
 516             c->c_needs_tls_accept = 1;
 517     } else {
 518             c->c_is_tls = 0;
 519             c->c_needs_tls_accept = 0;
 520     }
 521 #endif
 522
 523         slap_sasl_open( c );
 524         slap_sasl_external( c, ssf, authid );
 525
 526     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 527     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 528
 529     backend_connection_init(c);
 530
 531     return id;
 532 }
 533
 534 void connection2anonymous( Connection *c )
 535 {
 536     assert( connections != NULL );
 537     assert( c != NULL );
 538
 539         {
 540                 ber_len_t max = sockbuf_max_incoming;
 541                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 542         }
 543
 544         if(c->c_authmech != NULL ) {
 545                 free(c->c_authmech);
 546                 c->c_authmech = NULL;
 547         }
 548
 549     if(c->c_dn != NULL) {
 550         free(c->c_dn);
 551         c->c_dn = NULL;
 552     }
 553
 554         if(c->c_cdn != NULL) {
 555                 free(c->c_cdn);
 556                 c->c_cdn = NULL;
 557         }
 558
 559         c->c_authc_backend = NULL;
 560         c->c_authz_backend = NULL;
 561 }
 562
 563 static void
 564 connection_destroy( Connection *c )
 565 {
 566         /* note: connections_mutex should be locked by caller */
 567     ber_socket_t        sd;
 568
 569     assert( connections != NULL );
 570     assert( c != NULL );
 571     assert( c->c_struct_state != SLAP_C_UNUSED );
 572     assert( c->c_conn_state != SLAP_C_INVALID );
 573     assert( c->c_ops == NULL );
 574
 575     backend_connection_destroy(c);
 576
 577     c->c_protocol = 0;
 578     c->c_connid = -1;
 579
 580     c->c_activitytime = c->c_starttime = 0;
 581
 582         connection2anonymous( c );
 583
 584         if(c->c_listener_url != NULL) {
 585                 free(c->c_listener_url);
 586                 c->c_listener_url = NULL;
 587         }
 588
 589         if(c->c_peer_domain != NULL) {
 590                 free(c->c_peer_domain);
 591                 c->c_peer_domain = NULL;
 592         }
 593         if(c->c_peer_name != NULL) {
 594 #ifdef LDAP_PF_lOCAL
 595                 /*
 596                  * If peer was a domain socket, unlink. Mind you,
 597                  * they may be un-named. Should we leave this to
 598                  * the client?
 599                  */
 600                 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
 601                         char *path = c->c_peer_name + 5;
 602                         if (path != '\0') {
 603                                 (void)unlink(path);
 604                         }
 605                 }
 606 #endif /* LDAP_PF_LOCAL */
 607
 608                 free(c->c_peer_name);
 609                 c->c_peer_name = NULL;
 610         }
 611         if(c->c_sock_name != NULL) {
 612                 free(c->c_sock_name);
 613                 c->c_sock_name = NULL;
 614         }
 615
 616         c->c_sasl_bind_in_progress = 0;
 617         if(c->c_sasl_bind_mech != NULL) {
 618                 free(c->c_sasl_bind_mech);
 619                 c->c_sasl_bind_mech = NULL;
 620         }
 621
 622         slap_sasl_close( c );
 623
 624         if ( c->c_currentber != NULL ) {
 625                 ber_free( c->c_currentber, 1 );
 626                 c->c_currentber = NULL;
 627         }
 628
 629         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 630         if ( sd != AC_SOCKET_INVALID ) {
 631                 slapd_remove( sd, 0 );
 632
 633                 Statslog( LDAP_DEBUG_STATS,
 634                     "conn=%ld fd=%d closed\n",
 635                         c->c_connid, sd, 0, 0, 0 );
 636         }
 637
 638         ber_sockbuf_free( c->c_sb );
 639
 640         c->c_sb = ber_sockbuf_alloc( );
 641
 642         {
 643                 ber_len_t max = sockbuf_max_incoming;
 644                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 645         }
 646
 647     c->c_conn_state = SLAP_C_INVALID;
 648     c->c_struct_state = SLAP_C_UNUSED;
 649 }
 650
 651 int connection_state_closing( Connection *c )
 652 {
 653         /* c_mutex must be locked by caller */
 654
 655         int state;
 656         assert( c != NULL );
 657         assert( c->c_struct_state == SLAP_C_USED );
 658
 659         state = c->c_conn_state;
 660
 661         assert( state != SLAP_C_INVALID );
 662
 663         return state == SLAP_C_CLOSING;
 664 }
 665
 666 static void connection_abandon( Connection *c )
 667 {
 668         /* c_mutex must be locked by caller */
 669
 670         Operation *o;
 671
 672         for( o = c->c_ops; o != NULL; o = o->o_next ) {
 673                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 674                 o->o_abandon = 1;
 675                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 676         }
 677
 678         /* remove pending operations */
 679         for( o = slap_op_pop( &c->c_pending_ops );
 680                 o != NULL;
 681                 o = slap_op_pop( &c->c_pending_ops ) )
 682         {
 683                 slap_op_free( o );
 684         }
 685 }
 686
 687 void connection_closing( Connection *c )
 688 {
 689         assert( connections != NULL );
 690         assert( c != NULL );
 691         assert( c->c_struct_state == SLAP_C_USED );
 692         assert( c->c_conn_state != SLAP_C_INVALID );
 693
 694         /* c_mutex must be locked by caller */
 695
 696         if( c->c_conn_state != SLAP_C_CLOSING ) {
 697                 ber_socket_t    sd;
 698
 699                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 700 #ifdef NEW_LOGGING
 701                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 702                            "connection_closing: conn %d readying socket %d for close.\n",
 703                            c->c_connid, sd ));
 704 #else
 705                 Debug( LDAP_DEBUG_TRACE,
 706                         "connection_closing: readying conn=%ld sd=%d for close\n",
 707                         c->c_connid, sd, 0 );
 708 #endif
 709                 /* update state to closing */
 710                 c->c_conn_state = SLAP_C_CLOSING;
 711
 712                 /* don't listen on this port anymore */
 713                 slapd_clr_read( sd, 1 );
 714
 715                 /* abandon active operations */
 716                 connection_abandon( c );
 717
 718                 /* wake write blocked operations */
 719                 slapd_clr_write( sd, 1 );
 720                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 721         }
 722 }
 723
 724 static void connection_close( Connection *c )
 725 {
 726         ber_socket_t    sd;
 727
 728         assert( connections != NULL );
 729         assert( c != NULL );
 730         assert( c->c_struct_state == SLAP_C_USED );
 731         assert( c->c_conn_state == SLAP_C_CLOSING );
 732
 733         /* note: connections_mutex and c_mutex should be locked by caller */
 734
 735         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 736         if( c->c_ops != NULL ) {
 737 #ifdef NEW_LOGGING
 738                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 739                            "connection_close: conn %d  deferring sd %d\n",
 740                            c->c_connid, sd ));
 741 #else
 742                 Debug( LDAP_DEBUG_TRACE,
 743                         "connection_close: deferring conn=%ld sd=%d\n",
 744                         c->c_connid, sd, 0 );
 745 #endif
 746                 return;
 747         }
 748
 749 #ifdef NEW_LOGGING
 750         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 751                    "connection_close: conn %d  sd %d\n",
 752                    c->c_connid, sd ));
 753 #else
 754         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
 755                 c->c_connid, sd, 0 );
 756 #endif
 757         connection_destroy( c );
 758 }
 759
 760 unsigned long connections_nextid(void)
 761 {
 762         unsigned long id;
 763         assert( connections != NULL );
 764
 765         ldap_pvt_thread_mutex_lock( &connections_mutex );
 766
 767         id = conn_nextid;
 768
 769         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 770
 771         return id;
 772 }
 773
 774 Connection* connection_first( ber_socket_t *index )
 775 {
 776         assert( connections != NULL );
 777         assert( index != NULL );
 778
 779         ldap_pvt_thread_mutex_lock( &connections_mutex );
 780
 781         *index = 0;
 782
 783         return connection_next(NULL, index);
 784 }
 785
 786 Connection* connection_next( Connection *c, ber_socket_t *index )
 787 {
 788         assert( connections != NULL );
 789         assert( index != NULL );
 790         assert( *index <= dtblsize );
 791
 792         if( c != NULL ) {
 793                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 794         }
 795
 796         c = NULL;
 797
 798         for(; *index < dtblsize; (*index)++) {
 799                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 800                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 801 #ifndef HAVE_WINSOCK
 802                         continue;
 803 #else
 804                         break;
 805 #endif
 806                 }
 807
 808                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 809                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 810                         c = &connections[(*index)++];
 811                         break;
 812                 }
 813
 814                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 815                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 816         }
 817
 818         if( c != NULL ) {
 819                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 820         }
 821
 822         return c;
 823 }
 824
 825 void connection_done( Connection *c )
 826 {
 827         assert( connections != NULL );
 828
 829         if( c != NULL ) {
 830                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 831         }
 832
 833         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 834 }
 835
 836 /*
 837  * connection_activity - handle the request operation op on connection
 838  * conn.  This routine figures out what kind of operation it is and
 839  * calls the appropriate stub to handle it.
 840  */
 841
 842 static void *
 843 connection_operation( void *arg_v )
 844 {
 845         int rc;
 846         struct co_arg   *arg = arg_v;
 847         ber_tag_t tag = arg->co_op->o_tag;
 848         Connection *conn = arg->co_conn;
 849
 850         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 851         num_ops_initiated++;
 852         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 853
 854         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 855 #ifdef NEW_LOGGING
 856                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 857                            "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
 858                            conn->c_connid, (long)tag ));
 859 #else
 860                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 861                         "error: SASL bind in progress (tag=%ld).\n",
 862                         (long) tag, 0, 0 );
 863 #endif
 864                 send_ldap_result( conn, arg->co_op,
 865                         rc = LDAP_OPERATIONS_ERROR,
 866                         NULL, "SASL bind in progress", NULL, NULL );
 867                 goto operations_error;
 868         }
 869
 870         switch ( tag ) {
 871         case LDAP_REQ_BIND:
 872                 rc = do_bind( conn, arg->co_op );
 873                 break;
 874
 875         case LDAP_REQ_UNBIND:
 876                 rc = do_unbind( conn, arg->co_op );
 877                 break;
 878
 879         case LDAP_REQ_ADD:
 880                 rc = do_add( conn, arg->co_op );
 881                 break;
 882
 883         case LDAP_REQ_DELETE:
 884                 rc = do_delete( conn, arg->co_op );
 885                 break;
 886
 887         case LDAP_REQ_MODRDN:
 888                 rc = do_modrdn( conn, arg->co_op );
 889                 break;
 890
 891         case LDAP_REQ_MODIFY:
 892                 rc = do_modify( conn, arg->co_op );
 893                 break;
 894
 895         case LDAP_REQ_COMPARE:
 896                 rc = do_compare( conn, arg->co_op );
 897                 break;
 898
 899         case LDAP_REQ_SEARCH:
 900                 rc = do_search( conn, arg->co_op );
 901                 break;
 902
 903         case LDAP_REQ_ABANDON:
 904                 rc = do_abandon( conn, arg->co_op );
 905                 break;
 906
 907         case LDAP_REQ_EXTENDED:
 908                 rc = do_extended( conn, arg->co_op );
 909                 break;
 910
 911         default:
 912 #ifdef NEW_LOGGING
 913                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 914                            "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
 915                            conn->c_connid, tag ));
 916 #else
 917                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 918                     tag, 0, 0 );
 919 #endif
 920                 arg->co_op->o_tag = LBER_ERROR;
 921                 send_ldap_disconnect( conn, arg->co_op,
 922                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 923                 rc = -1;
 924                 break;
 925         }
 926
 927         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 928
 929 operations_error:
 930         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 931         num_ops_completed++;
 932         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 933
 934         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 935
 936         conn->c_n_ops_executing--;
 937         conn->c_n_ops_completed++;
 938
 939         slap_op_remove( &conn->c_ops, arg->co_op );
 940         slap_op_free( arg->co_op );
 941         arg->co_op = NULL;
 942         arg->co_conn = NULL;
 943         free( (char *) arg );
 944         arg = NULL;
 945
 946         switch( tag ) {
 947         case LBER_ERROR:
 948         case LDAP_REQ_UNBIND:
 949                 /* c_mutex is locked */
 950                 connection_closing( conn );
 951                 break;
 952
 953         case LDAP_REQ_BIND:
 954                 conn->c_sasl_bind_in_progress =
 955                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
 956
 957                 if( conn->c_conn_state == SLAP_C_BINDING) {
 958                         conn->c_conn_state = SLAP_C_ACTIVE;
 959                 }
 960         }
 961
 962         connection_resched( conn );
 963
 964         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 965
 966         return NULL;
 967 }
 968
 969 int connection_read(ber_socket_t s)
 970 {
 971         int rc = 0;
 972         Connection *c;
 973         assert( connections != NULL );
 974
 975         ldap_pvt_thread_mutex_lock( &connections_mutex );
 976
 977         /* get (locked) connection */
 978         c = connection_get( s );
 979
 980         if( c == NULL ) {
 981 #ifdef NEW_LOGGING
 982                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 983                            "connection_read: sock %ld no connection\n",
 984                            (long)s ));
 985 #else
 986                 Debug( LDAP_DEBUG_ANY,
 987                         "connection_read(%ld): no connection!\n",
 988                         (long) s, 0, 0 );
 989 #endif
 990                 slapd_remove(s, 0);
 991
 992                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 993                 return -1;
 994         }
 995
 996         c->c_n_read++;
 997
 998         if( c->c_conn_state == SLAP_C_CLOSING ) {
 999 #ifdef NEW_LOGGING
1000                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1001                            "connection_read: conn %d connection closing, ignoring input\n",
1002                            c->c_connid));
1003 #else
1004                 Debug( LDAP_DEBUG_TRACE,
1005                         "connection_read(%d): closing, ignoring input for id=%ld\n",
1006                         s, c->c_connid, 0 );
1007 #endif
1008                 connection_return( c );
1009                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1010                 return 0;
1011         }
1012
1013 #ifdef NEW_LOGGING
1014         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1015                    "connection_read: conn %d  checking for input.\n", c->c_connid ));
1016 #else
1017         Debug( LDAP_DEBUG_TRACE,
1018                 "connection_read(%d): checking for input on id=%ld\n",
1019                 s, c->c_connid, 0 );
1020 #endif
1021
1022 #ifdef HAVE_TLS
1023         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1024                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1025                 if ( rc < 0 ) {
1026                         struct timeval tv;
1027                         fd_set rfd;
1028
1029 #ifdef NEW_LOGGING
1030                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1031                                    "connection_read: conn %d  TLS accept error, error %d\n",
1032                                    c->c_connid, rc ));
1033 #else
1034                         Debug( LDAP_DEBUG_TRACE,
1035                                 "connection_read(%d): TLS accept error "
1036                                 "error=%d id=%ld, closing\n",
1037                                 s, rc, c->c_connid );
1038 #endif
1039                         c->c_needs_tls_accept = 0;
1040                         /* connections_mutex and c_mutex are locked */
1041                         connection_closing( c );
1042
1043 #if 0
1044                         /* Drain input before close, to allow SSL error codes
1045                          * to propagate to client. */
1046                         FD_ZERO(&rfd);
1047                         FD_SET(s, &rfd);
1048                         for (rc=1; rc>0;)
1049                         {
1050                             tv.tv_sec = 1;
1051                             tv.tv_usec = 0;
1052                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1053                             if (rc == 1)
1054                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1055                                     NULL);
1056                         }
1057 #endif
1058                         connection_close( c );
1059
1060                 } else if ( rc == 0 ) {
1061                         void *ssl;
1062                         char *authid;
1063
1064                         c->c_needs_tls_accept = 0;
1065
1066                         /* we need to let SASL know */
1067                         ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1068
1069                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1070                         if( c->c_tls_ssf > c->c_ssf ) {
1071                                 c->c_ssf = c->c_tls_ssf;
1072                         }
1073
1074                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1075                         slap_sasl_external( c, c->c_tls_ssf, authid );
1076                 }
1077                 connection_return( c );
1078                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1079                 return 0;
1080         }
1081 #endif
1082
1083 #ifdef HAVE_CYRUS_SASL
1084         if ( c->c_sasl_layers ) {
1085                 c->c_sasl_layers = 0;
1086
1087                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1088
1089                 if( rc != LDAP_SUCCESS ) {
1090 #ifdef NEW_LOGGING
1091                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1092                                    "connection_read: conn %d SASL install error %d, closing\n",
1093                                    c->c_connid, rc ));
1094 #else
1095                         Debug( LDAP_DEBUG_TRACE,
1096                                 "connection_read(%d): SASL install error "
1097                                 "error=%d id=%ld, closing\n",
1098                                 s, rc, c->c_connid );
1099 #endif
1100                         /* connections_mutex and c_mutex are locked */
1101                         connection_closing( c );
1102                         connection_close( c );
1103                         connection_return( c );
1104                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1105                         return 0;
1106                 }
1107         }
1108 #endif
1109
1110 #define CONNECTION_INPUT_LOOP 1
1111
1112 #ifdef DATA_READY_LOOP
1113         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1114 #elif CONNECTION_INPUT_LOOP
1115         while(!rc)
1116 #endif
1117         {
1118                 /* How do we do this without getting into a busy loop ? */
1119                 rc = connection_input( c );
1120         }
1121
1122         if( rc < 0 ) {
1123 #ifdef NEW_LOGGING
1124                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1125                            "connection_read: conn %d  input error %d, closing.\n",
1126                            c->c_connid, rc ));
1127 #else
1128                 Debug( LDAP_DEBUG_TRACE,
1129                         "connection_read(%d): input error=%d id=%ld, closing.\n",
1130                         s, rc, c->c_connid );
1131 #endif
1132                 /* connections_mutex and c_mutex are locked */
1133                 connection_closing( c );
1134                 connection_close( c );
1135                 connection_return( c );
1136                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1137                 return 0;
1138         }
1139
1140         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1141                 slapd_set_read( s, 1 );
1142         }
1143
1144         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1145                 slapd_set_write( s, 1 );
1146         }
1147
1148         connection_return( c );
1149         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1150         return 0;
1151 }
1152
1153 static int
1154 connection_input(
1155     Connection *conn
1156 )
1157 {
1158         Operation *op;
1159         ber_tag_t       tag;
1160         ber_len_t       len;
1161         ber_int_t       msgid;
1162         BerElement      *ber;
1163
1164         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1165             == NULL ) {
1166 #ifdef NEW_LOGGING
1167                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1168                            "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
1169 #else
1170                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1171 #endif
1172                 return -1;
1173         }
1174
1175         errno = 0;
1176
1177         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1178         if ( tag != LDAP_TAG_MESSAGE ) {
1179                 int err = errno;
1180                 ber_socket_t    sd;
1181
1182                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1183
1184 #ifdef NEW_LOGGING
1185                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1186                            "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
1187                            conn->c_connid, err, sock_errstr(err) ));
1188 #else
1189                 Debug( LDAP_DEBUG_TRACE,
1190                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1191                         sd, err, sock_errstr(err) );
1192 #endif
1193                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1194                         /* log, close and send error */
1195                         ber_free( conn->c_currentber, 1 );
1196                         conn->c_currentber = NULL;
1197
1198                         return -2;
1199                 }
1200                 return 1;
1201         }
1202
1203         ber = conn->c_currentber;
1204         conn->c_currentber = NULL;
1205
1206         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1207                 /* log, close and send error */
1208 #ifdef NEW_LOGGING
1209                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1210                            "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
1211                            conn->c_connid, tag ));
1212 #else
1213                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1214                     0 );
1215 #endif
1216                 ber_free( ber, 1 );
1217                 return -1;
1218         }
1219
1220         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1221                 /* log, close and send error */
1222 #ifdef NEW_LOGGING
1223                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1224                            "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
1225                            conn->c_connid, tag ));
1226 #else
1227                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1228                     0 );
1229 #endif
1230                 ber_free( ber, 1 );
1231
1232                 return -1;
1233         }
1234
1235         if(tag == LDAP_REQ_BIND) {
1236                 /* immediately abandon all exiting operations upon BIND */
1237                 connection_abandon( conn );
1238         }
1239
1240         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1241
1242         if ( conn->c_conn_state == SLAP_C_BINDING
1243                 || conn->c_conn_state == SLAP_C_CLOSING )
1244         {
1245 #ifdef NEW_LOGGING
1246                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1247                            "connection_input: conn %d  deferring operation\n",
1248                            conn->c_connid ));
1249 #else
1250                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1251 #endif
1252                 conn->c_n_ops_pending++;
1253                 slap_op_add( &conn->c_pending_ops, op );
1254
1255         } else {
1256                 conn->c_n_ops_executing++;
1257                 connection_op_activate( conn, op );
1258         }
1259
1260 #ifdef NO_THREADS
1261         if ( conn->c_struct_state != SLAP_C_USED ) {
1262                 /* connection must have got closed underneath us */
1263                 return 1;
1264         }
1265 #endif
1266         assert( conn->c_struct_state == SLAP_C_USED );
1267
1268         return 0;
1269 }
1270
1271 static int
1272 connection_resched( Connection *conn )
1273 {
1274         Operation *op;
1275
1276         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1277                 int rc;
1278                 ber_socket_t    sd;
1279                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1280
1281                 /* us trylock to avoid possible deadlock */
1282                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1283
1284                 if( rc ) {
1285 #ifdef NEW_LOGGING
1286                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1287                                    "connection_resched: conn %d  reaquiring locks.\n",
1288                                    conn->c_connid ));
1289 #else
1290                         Debug( LDAP_DEBUG_TRACE,
1291                                 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1292                                 conn->c_connid, sd, 0 );
1293 #endif
1294                         /*
1295                          * reaquire locks in the right order...
1296                          * this may allow another thread to close this connection,
1297                          * so recheck state below.
1298                          */
1299                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1300                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1301                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1302                 }
1303
1304                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1305 #ifdef NEW_LOGGING
1306                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1307                                    "connection_resched: conn %d  closed by other thread.\n",
1308                                    conn->c_connid ));
1309 #else
1310                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1311                                 "closed by other thread conn=%ld sd=%d\n",
1312                                 conn->c_connid, sd, 0 );
1313 #endif
1314                 } else {
1315 #ifdef NEW_LOGGING
1316                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1317                                    "connection_resched: conn %d  attempting closing.\n",
1318                                    conn->c_connid ));
1319 #else
1320                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1321                                 "attempting closing conn=%ld sd=%d\n",
1322                                 conn->c_connid, sd, 0 );
1323 #endif
1324                         connection_close( conn );
1325                 }
1326
1327                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1328                 return 0;
1329         }
1330
1331         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1332                 /* other states need different handling */
1333                 return 0;
1334         }
1335
1336         for( op = slap_op_pop( &conn->c_pending_ops );
1337                 op != NULL;
1338                 op = slap_op_pop( &conn->c_pending_ops ) )
1339         {
1340                 /* pending operations should not be marked for abandonment */
1341                 assert(!op->o_abandon);
1342
1343                 conn->c_n_ops_pending--;
1344                 conn->c_n_ops_executing++;
1345
1346                 connection_op_activate( conn, op );
1347
1348                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1349                         break;
1350                 }
1351         }
1352         return 0;
1353 }
1354
1355 static int connection_op_activate( Connection *conn, Operation *op )
1356 {
1357         struct co_arg *arg;
1358         int status;
1359         ber_tag_t tag = op->o_tag;
1360
1361         if(tag == LDAP_REQ_BIND) {
1362                 conn->c_conn_state = SLAP_C_BINDING;
1363         }
1364
1365         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1366         arg->co_conn = conn;
1367         arg->co_op = op;
1368
1369         arg->co_op->o_authz = conn->c_authz;
1370         arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1371         arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
1372         (void) dn_normalize( arg->co_op->o_ndn );
1373         arg->co_op->o_authtype = conn->c_authtype;
1374         arg->co_op->o_authmech = conn->c_authmech != NULL
1375                 ?  ch_strdup( conn->c_authmech ) : NULL;
1376
1377         arg->co_op->o_protocol = conn->c_protocol
1378                 ? conn->c_protocol : LDAP_VERSION3;
1379         arg->co_op->o_connid = conn->c_connid;
1380
1381         slap_op_add( &conn->c_ops, arg->co_op );
1382
1383         status = ldap_pvt_thread_pool_submit( &connection_pool,
1384                 connection_operation, (void *) arg );
1385
1386         if ( status != 0 ) {
1387 #ifdef NEW_LOGGING
1388                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1389                            "connection_op_activate: conn %d      thread pool submit failed.\n",
1390                            conn->c_connid ));
1391 #else
1392                 Debug( LDAP_DEBUG_ANY,
1393                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1394 #endif
1395                 /* should move op to pending list */
1396         }
1397
1398         return status;
1399 }
1400
1401 int connection_write(ber_socket_t s)
1402 {
1403         Connection *c;
1404         assert( connections != NULL );
1405
1406         ldap_pvt_thread_mutex_lock( &connections_mutex );
1407
1408         c = connection_get( s );
1409
1410         slapd_clr_write( s, 0);
1411
1412         if( c == NULL ) {
1413 #ifdef NEW_LOGGING
1414                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1415                            "connection_write: sock %ld  no connection!\n",(long)s));
1416 #else
1417                 Debug( LDAP_DEBUG_ANY,
1418                         "connection_write(%ld): no connection!\n",
1419                         (long) s, 0, 0 );
1420 #endif
1421                 slapd_remove(s, 0);
1422                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1423                 return -1;
1424         }
1425
1426         c->c_n_write++;
1427
1428 #ifdef NEW_LOGGING
1429         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1430                    "connection_write conn %d  waking output.\n",
1431                    c->c_connid ));
1432 #else
1433         Debug( LDAP_DEBUG_TRACE,
1434                 "connection_write(%d): waking output for id=%ld\n",
1435                 s, c->c_connid, 0 );
1436 #endif
1437         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1438
1439         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1440                 slapd_set_read( s, 1 );
1441         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1442                 slapd_set_write( s, 1 );
1443         connection_return( c );
1444         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1445         return 0;
1446 }
1447
1448
1449 /*
1450  * Create client side and server side connection structures, connected to
1451  * one another, for the front end to use for searches on arbitrary back ends.
1452  */
1453
1454 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1455 {
1456         int rc;
1457         ber_socket_t fd[2] = {-1,-1};
1458         Operation *op;
1459
1460         *conn=NULL;
1461         *ldp=NULL;
1462
1463         rc = lutil_pair( fd );
1464         if( rc == -1 ) {
1465                 return LDAP_OTHER;
1466         }
1467
1468         rc = connection_init( fd[1], "INT", "localhost",
1469       "localhost:0", "localhost:00", 0, 256, id );
1470         if( rc < 0 ) {
1471                 tcp_close( fd[0] );
1472                 tcp_close( fd[1] );
1473                 return LDAP_OTHER;
1474         }
1475         slapd_add_internal( fd[1] );
1476
1477         /* A search operation, number 0 */
1478         op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1479         op->o_ndn = ch_strdup( id );
1480         op->o_protocol = LDAP_VERSION3;
1481
1482         (*conn) = connection_get( fd[1] );
1483         (*conn)->c_ops = op;
1484     (*conn)->c_conn_state = SLAP_C_ACTIVE;
1485
1486
1487         /* Create the client side of the connection */
1488         rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1489         if( rc != LDAP_SUCCESS ) {
1490                 tcp_close( fd[0] );
1491                 return LDAP_OTHER;
1492         }
1493
1494         /* The connection_get() will have locked the connection's mutex */
1495         ldap_pvt_thread_mutex_unlock(  &((*conn)->c_mutex) );
1496
1497         return LDAP_SUCCESS;
1498 }
1499
1500
1501 void connection_internal_close( Connection *conn )
1502 {
1503         Operation *op = conn->c_ops;
1504
1505         slap_op_remove( &conn->c_ops, op );
1506         slap_op_free( op );
1507         connection_closing( conn );
1508         connection_close( conn );
1509 }