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                 c->c_currentber = NULL;
 426
 427         /* should check status of thread calls */
 428         ldap_pvt_thread_mutex_init( &c->c_mutex );
 429         ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 430         ldap_pvt_thread_cond_init( &c->c_write_cv );
 431
 432         c->c_struct_state = SLAP_C_UNUSED;
 433     }
 434
 435     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 436
 437     assert( c->c_struct_state == SLAP_C_UNUSED );
 438         assert( c->c_authmech == NULL );
 439     assert(     c->c_dn == NULL );
 440     assert(     c->c_cdn == NULL );
 441     assert( c->c_listener_url == NULL );
 442     assert( c->c_peer_domain == NULL );
 443     assert( c->c_peer_name == NULL );
 444     assert( c->c_sock_name == NULL );
 445     assert( c->c_ops == NULL );
 446     assert( c->c_pending_ops == NULL );
 447         assert( c->c_sasl_bind_mech == NULL );
 448         assert( c->c_sasl_context == NULL );
 449         assert( c->c_sasl_extra == NULL );
 450         assert( c->c_currentber == NULL );
 451
 452         c->c_listener_url = ch_strdup( url  );
 453         c->c_peer_domain = ch_strdup( dnsname  );
 454     c->c_peer_name = ch_strdup( peername  );
 455     c->c_sock_name = ch_strdup( sockname );
 456
 457     c->c_n_ops_received = 0;
 458     c->c_n_ops_executing = 0;
 459     c->c_n_ops_pending = 0;
 460     c->c_n_ops_completed = 0;
 461
 462         c->c_n_get = 0;
 463         c->c_n_read = 0;
 464         c->c_n_write = 0;
 465
 466         /* set to zero until bind, implies LDAP_VERSION3 */
 467         c->c_protocol = 0;
 468
 469     c->c_activitytime = c->c_starttime = slap_get_time();
 470
 471 #ifdef LDAP_DEBUG
 472         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 473                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 474 #endif
 475         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 476                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 477         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 478                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 479
 480 #ifdef LDAP_DEBUG
 481         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 482                 INT_MAX, (void*)"ldap_" );
 483 #endif
 484
 485         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 486                 c /* non-NULL */ ) < 0 )
 487         {
 488 #ifdef NEW_LOGGING
 489                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 490                            "connection_init: conn %d  set nonblocking failed\n",
 491                            c->c_connid ));
 492 #else
 493                 Debug( LDAP_DEBUG_ANY,
 494                         "connection_init(%d, %s): set nonblocking failed\n",
 495                         s, c->c_peer_name, 0 );
 496 #endif
 497         }
 498
 499     id = c->c_connid = conn_nextid++;
 500
 501     c->c_conn_state = SLAP_C_INACTIVE;
 502     c->c_struct_state = SLAP_C_USED;
 503
 504         c->c_ssf = c->c_transport_ssf = ssf;
 505         c->c_tls_ssf = 0;
 506
 507 #ifdef HAVE_TLS
 508     if ( use_tls ) {
 509             c->c_is_tls = 1;
 510             c->c_needs_tls_accept = 1;
 511     } else {
 512             c->c_is_tls = 0;
 513             c->c_needs_tls_accept = 0;
 514     }
 515 #endif
 516
 517         slap_sasl_open( c );
 518         slap_sasl_external( c, ssf, authid );
 519
 520     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 521     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 522
 523     backend_connection_init(c);
 524
 525     return id;
 526 }
 527
 528 void connection2anonymous( Connection *c )
 529 {
 530     assert( connections != NULL );
 531     assert( c != NULL );
 532
 533         if(c->c_authmech != NULL ) {
 534                 free(c->c_authmech);
 535                 c->c_authmech = NULL;
 536         }
 537
 538     if(c->c_dn != NULL) {
 539         free(c->c_dn);
 540         c->c_dn = NULL;
 541     }
 542
 543         if(c->c_cdn != NULL) {
 544                 free(c->c_cdn);
 545                 c->c_cdn = NULL;
 546         }
 547
 548         c->c_authc_backend = NULL;
 549         c->c_authz_backend = NULL;
 550 }
 551
 552 static void
 553 connection_destroy( Connection *c )
 554 {
 555         /* note: connections_mutex should be locked by caller */
 556     ber_socket_t        sd;
 557
 558     assert( connections != NULL );
 559     assert( c != NULL );
 560     assert( c->c_struct_state != SLAP_C_UNUSED );
 561     assert( c->c_conn_state != SLAP_C_INVALID );
 562     assert( c->c_ops == NULL );
 563
 564     backend_connection_destroy(c);
 565
 566     c->c_protocol = 0;
 567     c->c_connid = -1;
 568
 569     c->c_activitytime = c->c_starttime = 0;
 570
 571         connection2anonymous( c );
 572
 573         if(c->c_listener_url != NULL) {
 574                 free(c->c_listener_url);
 575                 c->c_listener_url = NULL;
 576         }
 577
 578         if(c->c_peer_domain != NULL) {
 579                 free(c->c_peer_domain);
 580                 c->c_peer_domain = NULL;
 581         }
 582         if(c->c_peer_name != NULL) {
 583 #ifdef LDAP_PF_lOCAL
 584                 /*
 585                  * If peer was a domain socket, unlink. Mind you,
 586                  * they may be un-named. Should we leave this to
 587                  * the client?
 588                  */
 589                 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
 590                         char *path = c->c_peer_name + 5;
 591                         if (path != '\0') {
 592                                 (void)unlink(path);
 593                         }
 594                 }
 595 #endif /* LDAP_PF_LOCAL */
 596
 597                 free(c->c_peer_name);
 598                 c->c_peer_name = NULL;
 599         }
 600         if(c->c_sock_name != NULL) {
 601                 free(c->c_sock_name);
 602                 c->c_sock_name = NULL;
 603         }
 604
 605         c->c_sasl_bind_in_progress = 0;
 606         if(c->c_sasl_bind_mech != NULL) {
 607                 free(c->c_sasl_bind_mech);
 608                 c->c_sasl_bind_mech = NULL;
 609         }
 610
 611         slap_sasl_close( c );
 612
 613         if ( c->c_currentber != NULL ) {
 614                 ber_free( c->c_currentber, 1 );
 615                 c->c_currentber = NULL;
 616         }
 617
 618         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 619         if ( sd != AC_SOCKET_INVALID ) {
 620                 slapd_remove( sd, 0 );
 621
 622                 Statslog( LDAP_DEBUG_STATS,
 623                     "conn=%ld fd=%d closed\n",
 624                         c->c_connid, sd, 0, 0, 0 );
 625         }
 626
 627         ber_sockbuf_free( c->c_sb );
 628         c->c_sb = ber_sockbuf_alloc( );
 629
 630     c->c_conn_state = SLAP_C_INVALID;
 631     c->c_struct_state = SLAP_C_UNUSED;
 632 }
 633
 634 int connection_state_closing( Connection *c )
 635 {
 636         /* c_mutex must be locked by caller */
 637
 638         int state;
 639         assert( c != NULL );
 640         assert( c->c_struct_state == SLAP_C_USED );
 641
 642         state = c->c_conn_state;
 643
 644         assert( state != SLAP_C_INVALID );
 645
 646         return state == SLAP_C_CLOSING;
 647 }
 648
 649 static void connection_abandon( Connection *c )
 650 {
 651         /* c_mutex must be locked by caller */
 652
 653         Operation *o;
 654
 655         for( o = c->c_ops; o != NULL; o = o->o_next ) {
 656                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 657                 o->o_abandon = 1;
 658                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 659         }
 660
 661         /* remove pending operations */
 662         for( o = slap_op_pop( &c->c_pending_ops );
 663                 o != NULL;
 664                 o = slap_op_pop( &c->c_pending_ops ) )
 665         {
 666                 slap_op_free( o );
 667         }
 668 }
 669
 670 void connection_closing( Connection *c )
 671 {
 672         assert( connections != NULL );
 673         assert( c != NULL );
 674         assert( c->c_struct_state == SLAP_C_USED );
 675         assert( c->c_conn_state != SLAP_C_INVALID );
 676
 677         /* c_mutex must be locked by caller */
 678
 679         if( c->c_conn_state != SLAP_C_CLOSING ) {
 680                 ber_socket_t    sd;
 681
 682                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 683 #ifdef NEW_LOGGING
 684                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 685                            "connection_closing: conn %d readying socket %d for close.\n",
 686                            c->c_connid, sd ));
 687 #else
 688                 Debug( LDAP_DEBUG_TRACE,
 689                         "connection_closing: readying conn=%ld sd=%d for close\n",
 690                         c->c_connid, sd, 0 );
 691 #endif
 692                 /* update state to closing */
 693                 c->c_conn_state = SLAP_C_CLOSING;
 694
 695                 /* don't listen on this port anymore */
 696                 slapd_clr_read( sd, 1 );
 697
 698                 /* abandon active operations */
 699                 connection_abandon( c );
 700
 701                 /* wake write blocked operations */
 702                 slapd_clr_write( sd, 1 );
 703                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 704         }
 705 }
 706
 707 static void connection_close( Connection *c )
 708 {
 709         ber_socket_t    sd;
 710
 711         assert( connections != NULL );
 712         assert( c != NULL );
 713         assert( c->c_struct_state == SLAP_C_USED );
 714         assert( c->c_conn_state == SLAP_C_CLOSING );
 715
 716         /* note: connections_mutex and c_mutex should be locked by caller */
 717
 718         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 719         if( c->c_ops != NULL ) {
 720 #ifdef NEW_LOGGING
 721                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 722                            "connection_close: conn %d  deferring sd %d\n",
 723                            c->c_connid, sd ));
 724 #else
 725                 Debug( LDAP_DEBUG_TRACE,
 726                         "connection_close: deferring conn=%ld sd=%d\n",
 727                         c->c_connid, sd, 0 );
 728 #endif
 729                 return;
 730         }
 731
 732 #ifdef NEW_LOGGING
 733         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 734                    "connection_close: conn %d  sd %d\n",
 735                    c->c_connid, sd ));
 736 #else
 737         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
 738                 c->c_connid, sd, 0 );
 739 #endif
 740         connection_destroy( c );
 741 }
 742
 743 unsigned long connections_nextid(void)
 744 {
 745         unsigned long id;
 746         assert( connections != NULL );
 747
 748         ldap_pvt_thread_mutex_lock( &connections_mutex );
 749
 750         id = conn_nextid;
 751
 752         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 753
 754         return id;
 755 }
 756
 757 Connection* connection_first( ber_socket_t *index )
 758 {
 759         assert( connections != NULL );
 760         assert( index != NULL );
 761
 762         ldap_pvt_thread_mutex_lock( &connections_mutex );
 763
 764         *index = 0;
 765
 766         return connection_next(NULL, index);
 767 }
 768
 769 Connection* connection_next( Connection *c, ber_socket_t *index )
 770 {
 771         assert( connections != NULL );
 772         assert( index != NULL );
 773         assert( *index <= dtblsize );
 774
 775         if( c != NULL ) {
 776                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 777         }
 778
 779         c = NULL;
 780
 781         for(; *index < dtblsize; (*index)++) {
 782                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 783                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 784 #ifndef HAVE_WINSOCK
 785                         continue;
 786 #else
 787                         break;
 788 #endif
 789                 }
 790
 791                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 792                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 793                         c = &connections[(*index)++];
 794                         break;
 795                 }
 796
 797                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 798                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 799         }
 800
 801         if( c != NULL ) {
 802                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 803         }
 804
 805         return c;
 806 }
 807
 808 void connection_done( Connection *c )
 809 {
 810         assert( connections != NULL );
 811
 812         if( c != NULL ) {
 813                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 814         }
 815
 816         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 817 }
 818
 819 /*
 820  * connection_activity - handle the request operation op on connection
 821  * conn.  This routine figures out what kind of operation it is and
 822  * calls the appropriate stub to handle it.
 823  */
 824
 825 static void *
 826 connection_operation( void *arg_v )
 827 {
 828         int rc;
 829         struct co_arg   *arg = arg_v;
 830         ber_tag_t tag = arg->co_op->o_tag;
 831         Connection *conn = arg->co_conn;
 832
 833         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 834         num_ops_initiated++;
 835         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 836
 837         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 838 #ifdef NEW_LOGGING
 839                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 840                            "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
 841                            conn->c_connid, (long)tag ));
 842 #else
 843                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 844                         "error: SASL bind in progress (tag=%ld).\n",
 845                         (long) tag, 0, 0 );
 846 #endif
 847                 send_ldap_result( conn, arg->co_op,
 848                         rc = LDAP_OPERATIONS_ERROR,
 849                         NULL, "SASL bind in progress", NULL, NULL );
 850                 goto operations_error;
 851         }
 852
 853         switch ( tag ) {
 854         case LDAP_REQ_BIND:
 855                 rc = do_bind( conn, arg->co_op );
 856                 break;
 857
 858         case LDAP_REQ_UNBIND:
 859                 rc = do_unbind( conn, arg->co_op );
 860                 break;
 861
 862         case LDAP_REQ_ADD:
 863                 rc = do_add( conn, arg->co_op );
 864                 break;
 865
 866         case LDAP_REQ_DELETE:
 867                 rc = do_delete( conn, arg->co_op );
 868                 break;
 869
 870         case LDAP_REQ_MODRDN:
 871                 rc = do_modrdn( conn, arg->co_op );
 872                 break;
 873
 874         case LDAP_REQ_MODIFY:
 875                 rc = do_modify( conn, arg->co_op );
 876                 break;
 877
 878         case LDAP_REQ_COMPARE:
 879                 rc = do_compare( conn, arg->co_op );
 880                 break;
 881
 882         case LDAP_REQ_SEARCH:
 883                 rc = do_search( conn, arg->co_op );
 884                 break;
 885
 886         case LDAP_REQ_ABANDON:
 887                 rc = do_abandon( conn, arg->co_op );
 888                 break;
 889
 890         case LDAP_REQ_EXTENDED:
 891                 rc = do_extended( conn, arg->co_op );
 892                 break;
 893
 894         default:
 895 #ifdef NEW_LOGGING
 896                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 897                            "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
 898                            conn->c_connid, tag ));
 899 #else
 900                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 901                     tag, 0, 0 );
 902 #endif
 903                 arg->co_op->o_tag = LBER_ERROR;
 904                 send_ldap_disconnect( conn, arg->co_op,
 905                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 906                 rc = -1;
 907                 break;
 908         }
 909
 910         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 911
 912 operations_error:
 913         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 914         num_ops_completed++;
 915         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 916
 917         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 918
 919         conn->c_n_ops_executing--;
 920         conn->c_n_ops_completed++;
 921
 922         slap_op_remove( &conn->c_ops, arg->co_op );
 923         slap_op_free( arg->co_op );
 924         arg->co_op = NULL;
 925         arg->co_conn = NULL;
 926         free( (char *) arg );
 927         arg = NULL;
 928
 929         switch( tag ) {
 930         case LBER_ERROR:
 931         case LDAP_REQ_UNBIND:
 932                 /* c_mutex is locked */
 933                 connection_closing( conn );
 934                 break;
 935
 936         case LDAP_REQ_BIND:
 937                 conn->c_sasl_bind_in_progress =
 938                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
 939
 940                 if( conn->c_conn_state == SLAP_C_BINDING) {
 941                         conn->c_conn_state = SLAP_C_ACTIVE;
 942                 }
 943         }
 944
 945         connection_resched( conn );
 946
 947         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 948
 949         return NULL;
 950 }
 951
 952 int connection_read(ber_socket_t s)
 953 {
 954         int rc = 0;
 955         Connection *c;
 956         assert( connections != NULL );
 957
 958         ldap_pvt_thread_mutex_lock( &connections_mutex );
 959
 960         /* get (locked) connection */
 961         c = connection_get( s );
 962
 963         if( c == NULL ) {
 964 #ifdef NEW_LOGGING
 965                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 966                            "connection_read: sock %ld no connection\n",
 967                            (long)s ));
 968 #else
 969                 Debug( LDAP_DEBUG_ANY,
 970                         "connection_read(%ld): no connection!\n",
 971                         (long) s, 0, 0 );
 972 #endif
 973                 slapd_remove(s, 0);
 974
 975                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 976                 return -1;
 977         }
 978
 979         c->c_n_read++;
 980
 981         if( c->c_conn_state == SLAP_C_CLOSING ) {
 982 #ifdef NEW_LOGGING
 983                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 984                            "connection_read: conn %d connection closing, ignoring input\n",
 985                            c->c_connid));
 986 #else
 987                 Debug( LDAP_DEBUG_TRACE,
 988                         "connection_read(%d): closing, ignoring input for id=%ld\n",
 989                         s, c->c_connid, 0 );
 990 #endif
 991                 connection_return( c );
 992                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 993                 return 0;
 994         }
 995
 996 #ifdef NEW_LOGGING
 997         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 998                    "connection_read: conn %d  checking for input.\n", c->c_connid ));
 999 #else
1000         Debug( LDAP_DEBUG_TRACE,
1001                 "connection_read(%d): checking for input on id=%ld\n",
1002                 s, c->c_connid, 0 );
1003 #endif
1004
1005 #ifdef HAVE_TLS
1006         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1007                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1008                 if ( rc < 0 ) {
1009                         struct timeval tv;
1010                         fd_set rfd;
1011
1012 #ifdef NEW_LOGGING
1013                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1014                                    "connection_read: conn %d  TLS accept error, error %d\n",
1015                                    c->c_connid, rc ));
1016 #else
1017                         Debug( LDAP_DEBUG_TRACE,
1018                                 "connection_read(%d): TLS accept error "
1019                                 "error=%d id=%ld, closing\n",
1020                                 s, rc, c->c_connid );
1021 #endif
1022                         c->c_needs_tls_accept = 0;
1023                         /* connections_mutex and c_mutex are locked */
1024                         connection_closing( c );
1025
1026 #if 0
1027                         /* Drain input before close, to allow SSL error codes
1028                          * to propagate to client. */
1029                         FD_ZERO(&rfd);
1030                         FD_SET(s, &rfd);
1031                         for (rc=1; rc>0;)
1032                         {
1033                             tv.tv_sec = 1;
1034                             tv.tv_usec = 0;
1035                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1036                             if (rc == 1)
1037                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1038                                     NULL);
1039                         }
1040 #endif
1041                         connection_close( c );
1042
1043                 } else if ( rc == 0 ) {
1044                         void *ssl;
1045                         char *authid;
1046
1047                         c->c_needs_tls_accept = 0;
1048
1049                         /* we need to let SASL know */
1050                         ssl = (void *)ldap_pvt_tls_sb_handle( c->c_sb );
1051
1052                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1053                         if( c->c_tls_ssf > c->c_ssf ) {
1054                                 c->c_ssf = c->c_tls_ssf;
1055                         }
1056
1057                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1058                         slap_sasl_external( c, c->c_tls_ssf, authid );
1059                 }
1060                 connection_return( c );
1061                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1062                 return 0;
1063         }
1064 #endif
1065
1066 #ifdef HAVE_CYRUS_SASL
1067         if ( c->c_sasl_layers ) {
1068                 c->c_sasl_layers = 0;
1069
1070                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1071
1072                 if( rc != LDAP_SUCCESS ) {
1073 #ifdef NEW_LOGGING
1074                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1075                                    "connection_read: conn %d SASL install error %d, closing\n",
1076                                    c->c_connid, rc ));
1077 #else
1078                         Debug( LDAP_DEBUG_TRACE,
1079                                 "connection_read(%d): SASL install error "
1080                                 "error=%d id=%ld, closing\n",
1081                                 s, rc, c->c_connid );
1082 #endif
1083                         /* connections_mutex and c_mutex are locked */
1084                         connection_closing( c );
1085                         connection_close( c );
1086                         connection_return( c );
1087                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1088                         return 0;
1089                 }
1090         }
1091 #endif
1092
1093 #define CONNECTION_INPUT_LOOP 1
1094
1095 #ifdef DATA_READY_LOOP
1096         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1097 #elif CONNECTION_INPUT_LOOP
1098         while(!rc)
1099 #endif
1100         {
1101                 /* How do we do this without getting into a busy loop ? */
1102                 rc = connection_input( c );
1103         }
1104
1105         if( rc < 0 ) {
1106 #ifdef NEW_LOGGING
1107                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1108                            "connection_read: conn %d  input error %d, closing.\n",
1109                            c->c_connid, rc ));
1110 #else
1111                 Debug( LDAP_DEBUG_TRACE,
1112                         "connection_read(%d): input error=%d id=%ld, closing.\n",
1113                         s, rc, c->c_connid );
1114 #endif
1115                 /* connections_mutex and c_mutex are locked */
1116                 connection_closing( c );
1117                 connection_close( c );
1118                 connection_return( c );
1119                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1120                 return 0;
1121         }
1122
1123         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1124                 slapd_set_read( s, 1 );
1125         }
1126
1127         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1128                 slapd_set_write( s, 1 );
1129         }
1130
1131         connection_return( c );
1132         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1133         return 0;
1134 }
1135
1136 static int
1137 connection_input(
1138     Connection *conn
1139 )
1140 {
1141         Operation *op;
1142         ber_tag_t       tag;
1143         ber_len_t       len;
1144         ber_int_t       msgid;
1145         BerElement      *ber;
1146
1147         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1148             == NULL ) {
1149 #ifdef NEW_LOGGING
1150                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1151                            "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
1152 #else
1153                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1154 #endif
1155                 return -1;
1156         }
1157
1158         errno = 0;
1159
1160         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1161         if ( tag != LDAP_TAG_MESSAGE ) {
1162                 int err = errno;
1163                 ber_socket_t    sd;
1164
1165                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1166
1167 #ifdef NEW_LOGGING
1168                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1169                            "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
1170                            conn->c_connid, err, sock_errstr(err) ));
1171 #else
1172                 Debug( LDAP_DEBUG_TRACE,
1173                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1174                         sd, err, sock_errstr(err) );
1175 #endif
1176                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1177                         /* log, close and send error */
1178                         ber_free( conn->c_currentber, 1 );
1179                         conn->c_currentber = NULL;
1180
1181                         return -2;
1182                 }
1183                 return 1;
1184         }
1185
1186         ber = conn->c_currentber;
1187         conn->c_currentber = NULL;
1188
1189         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1190                 /* log, close and send error */
1191 #ifdef NEW_LOGGING
1192                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1193                            "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
1194                            conn->c_connid, tag ));
1195 #else
1196                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1197                     0 );
1198 #endif
1199                 ber_free( ber, 1 );
1200                 return -1;
1201         }
1202
1203         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1204                 /* log, close and send error */
1205 #ifdef NEW_LOGGING
1206                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1207                            "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
1208                            conn->c_connid, tag ));
1209 #else
1210                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1211                     0 );
1212 #endif
1213                 ber_free( ber, 1 );
1214
1215                 return -1;
1216         }
1217
1218         if(tag == LDAP_REQ_BIND) {
1219                 /* immediately abandon all exiting operations upon BIND */
1220                 connection_abandon( conn );
1221         }
1222
1223         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1224
1225         if ( conn->c_conn_state == SLAP_C_BINDING
1226                 || conn->c_conn_state == SLAP_C_CLOSING )
1227         {
1228 #ifdef NEW_LOGGING
1229                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1230                            "connection_input: conn %d  deferring operation\n",
1231                            conn->c_connid ));
1232 #else
1233                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1234 #endif
1235                 conn->c_n_ops_pending++;
1236                 slap_op_add( &conn->c_pending_ops, op );
1237
1238         } else {
1239                 conn->c_n_ops_executing++;
1240                 connection_op_activate( conn, op );
1241         }
1242
1243 #ifdef NO_THREADS
1244         if ( conn->c_struct_state != SLAP_C_USED ) {
1245                 /* connection must have got closed underneath us */
1246                 return 1;
1247         }
1248 #endif
1249         assert( conn->c_struct_state == SLAP_C_USED );
1250
1251         return 0;
1252 }
1253
1254 static int
1255 connection_resched( Connection *conn )
1256 {
1257         Operation *op;
1258
1259         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1260                 int rc;
1261                 ber_socket_t    sd;
1262                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1263
1264                 /* us trylock to avoid possible deadlock */
1265                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1266
1267                 if( rc ) {
1268 #ifdef NEW_LOGGING
1269                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1270                                    "connection_resched: conn %d  reaquiring locks.\n",
1271                                    conn->c_connid ));
1272 #else
1273                         Debug( LDAP_DEBUG_TRACE,
1274                                 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1275                                 conn->c_connid, sd, 0 );
1276 #endif
1277                         /*
1278                          * reaquire locks in the right order...
1279                          * this may allow another thread to close this connection,
1280                          * so recheck state below.
1281                          */
1282                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1283                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1284                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1285                 }
1286
1287                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1288 #ifdef NEW_LOGGING
1289                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1290                                    "connection_resched: conn %d  closed by other thread.\n",
1291                                    conn->c_connid ));
1292 #else
1293                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1294                                 "closed by other thread conn=%ld sd=%d\n",
1295                                 conn->c_connid, sd, 0 );
1296 #endif
1297                 } else {
1298 #ifdef NEW_LOGGING
1299                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1300                                    "connection_resched: conn %d  attempting closing.\n",
1301                                    conn->c_connid ));
1302 #else
1303                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1304                                 "attempting closing conn=%ld sd=%d\n",
1305                                 conn->c_connid, sd, 0 );
1306 #endif
1307                         connection_close( conn );
1308                 }
1309
1310                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1311                 return 0;
1312         }
1313
1314         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1315                 /* other states need different handling */
1316                 return 0;
1317         }
1318
1319         for( op = slap_op_pop( &conn->c_pending_ops );
1320                 op != NULL;
1321                 op = slap_op_pop( &conn->c_pending_ops ) )
1322         {
1323                 /* pending operations should not be marked for abandonment */
1324                 assert(!op->o_abandon);
1325
1326                 conn->c_n_ops_pending--;
1327                 conn->c_n_ops_executing++;
1328
1329                 connection_op_activate( conn, op );
1330
1331                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1332                         break;
1333                 }
1334         }
1335         return 0;
1336 }
1337
1338 static int connection_op_activate( Connection *conn, Operation *op )
1339 {
1340         struct co_arg *arg;
1341         int status;
1342         ber_tag_t tag = op->o_tag;
1343
1344         if(tag == LDAP_REQ_BIND) {
1345                 conn->c_conn_state = SLAP_C_BINDING;
1346         }
1347
1348         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1349         arg->co_conn = conn;
1350         arg->co_op = op;
1351
1352         arg->co_op->o_authz = conn->c_authz;
1353         arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1354         arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
1355         (void) dn_normalize( arg->co_op->o_ndn );
1356         arg->co_op->o_authtype = conn->c_authtype;
1357         arg->co_op->o_authmech = conn->c_authmech != NULL
1358                 ?  ch_strdup( conn->c_authmech ) : NULL;
1359
1360         arg->co_op->o_protocol = conn->c_protocol
1361                 ? conn->c_protocol : LDAP_VERSION3;
1362         arg->co_op->o_connid = conn->c_connid;
1363
1364         slap_op_add( &conn->c_ops, arg->co_op );
1365
1366         status = ldap_pvt_thread_pool_submit( &connection_pool,
1367                 connection_operation, (void *) arg );
1368
1369         if ( status != 0 ) {
1370 #ifdef NEW_LOGGING
1371                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1372                            "connection_op_activate: conn %d      thread pool submit failed.\n",
1373                            conn->c_connid ));
1374 #else
1375                 Debug( LDAP_DEBUG_ANY,
1376                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1377 #endif
1378                 /* should move op to pending list */
1379         }
1380
1381         return status;
1382 }
1383
1384 int connection_write(ber_socket_t s)
1385 {
1386         Connection *c;
1387         assert( connections != NULL );
1388
1389         ldap_pvt_thread_mutex_lock( &connections_mutex );
1390
1391         c = connection_get( s );
1392
1393         slapd_clr_write( s, 0);
1394
1395         if( c == NULL ) {
1396 #ifdef NEW_LOGGING
1397                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1398                            "connection_write: sock %ld  no connection!\n",(long)s));
1399 #else
1400                 Debug( LDAP_DEBUG_ANY,
1401                         "connection_write(%ld): no connection!\n",
1402                         (long) s, 0, 0 );
1403 #endif
1404                 slapd_remove(s, 0);
1405                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1406                 return -1;
1407         }
1408
1409         c->c_n_write++;
1410
1411 #ifdef NEW_LOGGING
1412         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1413                    "connection_write conn %d  waking output.\n",
1414                    c->c_connid ));
1415 #else
1416         Debug( LDAP_DEBUG_TRACE,
1417                 "connection_write(%d): waking output for id=%ld\n",
1418                 s, c->c_connid, 0 );
1419 #endif
1420         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1421
1422         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1423                 slapd_set_read( s, 1 );
1424         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1425                 slapd_set_write( s, 1 );
1426         connection_return( c );
1427         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1428         return 0;
1429 }
1430
1431
1432 /*
1433  * Create client side and server side connection structures, connected to
1434  * one another, for the front end to use for searches on arbitrary back ends.
1435  */
1436
1437 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1438 {
1439         int rc;
1440         ber_socket_t fd[2] = {-1,-1};
1441         Operation *op;
1442
1443         *conn=NULL;
1444         *ldp=NULL;
1445
1446         rc = lutil_pair( fd );
1447         if( rc == -1 ) {
1448                 return LDAP_OTHER;
1449         }
1450
1451         rc = connection_init( fd[1], "INT", "localhost",
1452       "localhost:0", "localhost:00", 0, 256, id );
1453         if( rc < 0 ) {
1454                 tcp_close( fd[0] );
1455                 tcp_close( fd[1] );
1456                 return LDAP_OTHER;
1457         }
1458         slapd_add_internal( fd[1] );
1459
1460         /* A search operation, number 0 */
1461         op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1462         op->o_ndn = ch_strdup( id );
1463         op->o_protocol = LDAP_VERSION3;
1464
1465         (*conn) = connection_get( fd[1] );
1466         (*conn)->c_ops = op;
1467     (*conn)->c_conn_state = SLAP_C_ACTIVE;
1468
1469
1470         /* Create the client side of the connection */
1471         rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1472         if( rc != LDAP_SUCCESS ) {
1473                 tcp_close( fd[0] );
1474                 return LDAP_OTHER;
1475         }
1476
1477         /* The connection_get() will have locked the connection's mutex */
1478         ldap_pvt_thread_mutex_unlock(  &((*conn)->c_mutex) );
1479
1480         return LDAP_SUCCESS;
1481 }
1482
1483
1484 void connection_internal_close( Connection *conn )
1485 {
1486         Operation *op = conn->c_ops;
1487
1488         slap_op_remove( &conn->c_ops, op );
1489         slap_op_free( op );
1490         connection_closing( conn );
1491         connection_close( conn );
1492 }