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 = SLAP_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         if(c->c_authmech != NULL ) {
 540                 free(c->c_authmech);
 541                 c->c_authmech = NULL;
 542         }
 543
 544     if(c->c_dn != NULL) {
 545         free(c->c_dn);
 546         c->c_dn = NULL;
 547     }
 548
 549         if(c->c_cdn != NULL) {
 550                 free(c->c_cdn);
 551                 c->c_cdn = NULL;
 552         }
 553
 554         c->c_authc_backend = NULL;
 555         c->c_authz_backend = NULL;
 556 }
 557
 558 static void
 559 connection_destroy( Connection *c )
 560 {
 561         /* note: connections_mutex should be locked by caller */
 562     ber_socket_t        sd;
 563
 564     assert( connections != NULL );
 565     assert( c != NULL );
 566     assert( c->c_struct_state != SLAP_C_UNUSED );
 567     assert( c->c_conn_state != SLAP_C_INVALID );
 568     assert( c->c_ops == NULL );
 569
 570     backend_connection_destroy(c);
 571
 572     c->c_protocol = 0;
 573     c->c_connid = -1;
 574
 575     c->c_activitytime = c->c_starttime = 0;
 576
 577         connection2anonymous( c );
 578
 579         if(c->c_listener_url != NULL) {
 580                 free(c->c_listener_url);
 581                 c->c_listener_url = NULL;
 582         }
 583
 584         if(c->c_peer_domain != NULL) {
 585                 free(c->c_peer_domain);
 586                 c->c_peer_domain = NULL;
 587         }
 588         if(c->c_peer_name != NULL) {
 589 #ifdef LDAP_PF_lOCAL
 590                 /*
 591                  * If peer was a domain socket, unlink. Mind you,
 592                  * they may be un-named. Should we leave this to
 593                  * the client?
 594                  */
 595                 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
 596                         char *path = c->c_peer_name + 5;
 597                         if (path != '\0') {
 598                                 (void)unlink(path);
 599                         }
 600                 }
 601 #endif /* LDAP_PF_LOCAL */
 602
 603                 free(c->c_peer_name);
 604                 c->c_peer_name = NULL;
 605         }
 606         if(c->c_sock_name != NULL) {
 607                 free(c->c_sock_name);
 608                 c->c_sock_name = NULL;
 609         }
 610
 611         c->c_sasl_bind_in_progress = 0;
 612         if(c->c_sasl_bind_mech != NULL) {
 613                 free(c->c_sasl_bind_mech);
 614                 c->c_sasl_bind_mech = NULL;
 615         }
 616
 617         slap_sasl_close( c );
 618
 619         if ( c->c_currentber != NULL ) {
 620                 ber_free( c->c_currentber, 1 );
 621                 c->c_currentber = NULL;
 622         }
 623
 624         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 625         if ( sd != AC_SOCKET_INVALID ) {
 626                 slapd_remove( sd, 0 );
 627
 628                 Statslog( LDAP_DEBUG_STATS,
 629                     "conn=%ld fd=%d closed\n",
 630                         c->c_connid, sd, 0, 0, 0 );
 631         }
 632
 633         ber_sockbuf_free( c->c_sb );
 634
 635         c->c_sb = ber_sockbuf_alloc( );
 636
 637         {
 638                 ber_len_t max = SLAP_MAX_INCOMING;
 639                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 640         }
 641
 642     c->c_conn_state = SLAP_C_INVALID;
 643     c->c_struct_state = SLAP_C_UNUSED;
 644 }
 645
 646 int connection_state_closing( Connection *c )
 647 {
 648         /* c_mutex must be locked by caller */
 649
 650         int state;
 651         assert( c != NULL );
 652         assert( c->c_struct_state == SLAP_C_USED );
 653
 654         state = c->c_conn_state;
 655
 656         assert( state != SLAP_C_INVALID );
 657
 658         return state == SLAP_C_CLOSING;
 659 }
 660
 661 static void connection_abandon( Connection *c )
 662 {
 663         /* c_mutex must be locked by caller */
 664
 665         Operation *o;
 666
 667         for( o = c->c_ops; o != NULL; o = o->o_next ) {
 668                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 669                 o->o_abandon = 1;
 670                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 671         }
 672
 673         /* remove pending operations */
 674         for( o = slap_op_pop( &c->c_pending_ops );
 675                 o != NULL;
 676                 o = slap_op_pop( &c->c_pending_ops ) )
 677         {
 678                 slap_op_free( o );
 679         }
 680 }
 681
 682 void connection_closing( Connection *c )
 683 {
 684         assert( connections != NULL );
 685         assert( c != NULL );
 686         assert( c->c_struct_state == SLAP_C_USED );
 687         assert( c->c_conn_state != SLAP_C_INVALID );
 688
 689         /* c_mutex must be locked by caller */
 690
 691         if( c->c_conn_state != SLAP_C_CLOSING ) {
 692                 ber_socket_t    sd;
 693
 694                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 695 #ifdef NEW_LOGGING
 696                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 697                            "connection_closing: conn %d readying socket %d for close.\n",
 698                            c->c_connid, sd ));
 699 #else
 700                 Debug( LDAP_DEBUG_TRACE,
 701                         "connection_closing: readying conn=%ld sd=%d for close\n",
 702                         c->c_connid, sd, 0 );
 703 #endif
 704                 /* update state to closing */
 705                 c->c_conn_state = SLAP_C_CLOSING;
 706
 707                 /* don't listen on this port anymore */
 708                 slapd_clr_read( sd, 1 );
 709
 710                 /* abandon active operations */
 711                 connection_abandon( c );
 712
 713                 /* wake write blocked operations */
 714                 slapd_clr_write( sd, 1 );
 715                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 716         }
 717 }
 718
 719 static void connection_close( Connection *c )
 720 {
 721         ber_socket_t    sd;
 722
 723         assert( connections != NULL );
 724         assert( c != NULL );
 725         assert( c->c_struct_state == SLAP_C_USED );
 726         assert( c->c_conn_state == SLAP_C_CLOSING );
 727
 728         /* note: connections_mutex and c_mutex should be locked by caller */
 729
 730         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 731         if( c->c_ops != NULL ) {
 732 #ifdef NEW_LOGGING
 733                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 734                            "connection_close: conn %d  deferring sd %d\n",
 735                            c->c_connid, sd ));
 736 #else
 737                 Debug( LDAP_DEBUG_TRACE,
 738                         "connection_close: deferring conn=%ld sd=%d\n",
 739                         c->c_connid, sd, 0 );
 740 #endif
 741                 return;
 742         }
 743
 744 #ifdef NEW_LOGGING
 745         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 746                    "connection_close: conn %d  sd %d\n",
 747                    c->c_connid, sd ));
 748 #else
 749         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
 750                 c->c_connid, sd, 0 );
 751 #endif
 752         connection_destroy( c );
 753 }
 754
 755 unsigned long connections_nextid(void)
 756 {
 757         unsigned long id;
 758         assert( connections != NULL );
 759
 760         ldap_pvt_thread_mutex_lock( &connections_mutex );
 761
 762         id = conn_nextid;
 763
 764         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 765
 766         return id;
 767 }
 768
 769 Connection* connection_first( ber_socket_t *index )
 770 {
 771         assert( connections != NULL );
 772         assert( index != NULL );
 773
 774         ldap_pvt_thread_mutex_lock( &connections_mutex );
 775
 776         *index = 0;
 777
 778         return connection_next(NULL, index);
 779 }
 780
 781 Connection* connection_next( Connection *c, ber_socket_t *index )
 782 {
 783         assert( connections != NULL );
 784         assert( index != NULL );
 785         assert( *index <= dtblsize );
 786
 787         if( c != NULL ) {
 788                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 789         }
 790
 791         c = NULL;
 792
 793         for(; *index < dtblsize; (*index)++) {
 794                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 795                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 796 #ifndef HAVE_WINSOCK
 797                         continue;
 798 #else
 799                         break;
 800 #endif
 801                 }
 802
 803                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 804                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 805                         c = &connections[(*index)++];
 806                         break;
 807                 }
 808
 809                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 810                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 811         }
 812
 813         if( c != NULL ) {
 814                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 815         }
 816
 817         return c;
 818 }
 819
 820 void connection_done( Connection *c )
 821 {
 822         assert( connections != NULL );
 823
 824         if( c != NULL ) {
 825                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 826         }
 827
 828         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 829 }
 830
 831 /*
 832  * connection_activity - handle the request operation op on connection
 833  * conn.  This routine figures out what kind of operation it is and
 834  * calls the appropriate stub to handle it.
 835  */
 836
 837 static void *
 838 connection_operation( void *arg_v )
 839 {
 840         int rc;
 841         struct co_arg   *arg = arg_v;
 842         ber_tag_t tag = arg->co_op->o_tag;
 843         Connection *conn = arg->co_conn;
 844
 845         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 846         num_ops_initiated++;
 847         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 848
 849         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 850 #ifdef NEW_LOGGING
 851                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 852                            "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
 853                            conn->c_connid, (long)tag ));
 854 #else
 855                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 856                         "error: SASL bind in progress (tag=%ld).\n",
 857                         (long) tag, 0, 0 );
 858 #endif
 859                 send_ldap_result( conn, arg->co_op,
 860                         rc = LDAP_OPERATIONS_ERROR,
 861                         NULL, "SASL bind in progress", NULL, NULL );
 862                 goto operations_error;
 863         }
 864
 865         switch ( tag ) {
 866         case LDAP_REQ_BIND:
 867                 rc = do_bind( conn, arg->co_op );
 868                 break;
 869
 870         case LDAP_REQ_UNBIND:
 871                 rc = do_unbind( conn, arg->co_op );
 872                 break;
 873
 874         case LDAP_REQ_ADD:
 875                 rc = do_add( conn, arg->co_op );
 876                 break;
 877
 878         case LDAP_REQ_DELETE:
 879                 rc = do_delete( conn, arg->co_op );
 880                 break;
 881
 882         case LDAP_REQ_MODRDN:
 883                 rc = do_modrdn( conn, arg->co_op );
 884                 break;
 885
 886         case LDAP_REQ_MODIFY:
 887                 rc = do_modify( conn, arg->co_op );
 888                 break;
 889
 890         case LDAP_REQ_COMPARE:
 891                 rc = do_compare( conn, arg->co_op );
 892                 break;
 893
 894         case LDAP_REQ_SEARCH:
 895                 rc = do_search( conn, arg->co_op );
 896                 break;
 897
 898         case LDAP_REQ_ABANDON:
 899                 rc = do_abandon( conn, arg->co_op );
 900                 break;
 901
 902         case LDAP_REQ_EXTENDED:
 903                 rc = do_extended( conn, arg->co_op );
 904                 break;
 905
 906         default:
 907 #ifdef NEW_LOGGING
 908                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 909                            "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
 910                            conn->c_connid, tag ));
 911 #else
 912                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 913                     tag, 0, 0 );
 914 #endif
 915                 arg->co_op->o_tag = LBER_ERROR;
 916                 send_ldap_disconnect( conn, arg->co_op,
 917                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 918                 rc = -1;
 919                 break;
 920         }
 921
 922         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 923
 924 operations_error:
 925         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 926         num_ops_completed++;
 927         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 928
 929         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 930
 931         conn->c_n_ops_executing--;
 932         conn->c_n_ops_completed++;
 933
 934         slap_op_remove( &conn->c_ops, arg->co_op );
 935         slap_op_free( arg->co_op );
 936         arg->co_op = NULL;
 937         arg->co_conn = NULL;
 938         free( (char *) arg );
 939         arg = NULL;
 940
 941         switch( tag ) {
 942         case LBER_ERROR:
 943         case LDAP_REQ_UNBIND:
 944                 /* c_mutex is locked */
 945                 connection_closing( conn );
 946                 break;
 947
 948         case LDAP_REQ_BIND:
 949                 conn->c_sasl_bind_in_progress =
 950                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
 951
 952                 if( conn->c_conn_state == SLAP_C_BINDING) {
 953                         conn->c_conn_state = SLAP_C_ACTIVE;
 954                 }
 955         }
 956
 957         connection_resched( conn );
 958
 959         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
 960
 961         return NULL;
 962 }
 963
 964 int connection_read(ber_socket_t s)
 965 {
 966         int rc = 0;
 967         Connection *c;
 968         assert( connections != NULL );
 969
 970         ldap_pvt_thread_mutex_lock( &connections_mutex );
 971
 972         /* get (locked) connection */
 973         c = connection_get( s );
 974
 975         if( c == NULL ) {
 976 #ifdef NEW_LOGGING
 977                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 978                            "connection_read: sock %ld no connection\n",
 979                            (long)s ));
 980 #else
 981                 Debug( LDAP_DEBUG_ANY,
 982                         "connection_read(%ld): no connection!\n",
 983                         (long) s, 0, 0 );
 984 #endif
 985                 slapd_remove(s, 0);
 986
 987                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 988                 return -1;
 989         }
 990
 991         c->c_n_read++;
 992
 993         if( c->c_conn_state == SLAP_C_CLOSING ) {
 994 #ifdef NEW_LOGGING
 995                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 996                            "connection_read: conn %d connection closing, ignoring input\n",
 997                            c->c_connid));
 998 #else
 999                 Debug( LDAP_DEBUG_TRACE,
1000                         "connection_read(%d): closing, ignoring input for id=%ld\n",
1001                         s, c->c_connid, 0 );
1002 #endif
1003                 connection_return( c );
1004                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1005                 return 0;
1006         }
1007
1008 #ifdef NEW_LOGGING
1009         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1010                    "connection_read: conn %d  checking for input.\n", c->c_connid ));
1011 #else
1012         Debug( LDAP_DEBUG_TRACE,
1013                 "connection_read(%d): checking for input on id=%ld\n",
1014                 s, c->c_connid, 0 );
1015 #endif
1016
1017 #ifdef HAVE_TLS
1018         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1019                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1020                 if ( rc < 0 ) {
1021                         struct timeval tv;
1022                         fd_set rfd;
1023
1024 #ifdef NEW_LOGGING
1025                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1026                                    "connection_read: conn %d  TLS accept error, error %d\n",
1027                                    c->c_connid, rc ));
1028 #else
1029                         Debug( LDAP_DEBUG_TRACE,
1030                                 "connection_read(%d): TLS accept error "
1031                                 "error=%d id=%ld, closing\n",
1032                                 s, rc, c->c_connid );
1033 #endif
1034                         c->c_needs_tls_accept = 0;
1035                         /* connections_mutex and c_mutex are locked */
1036                         connection_closing( c );
1037
1038 #if 0
1039                         /* Drain input before close, to allow SSL error codes
1040                          * to propagate to client. */
1041                         FD_ZERO(&rfd);
1042                         FD_SET(s, &rfd);
1043                         for (rc=1; rc>0;)
1044                         {
1045                             tv.tv_sec = 1;
1046                             tv.tv_usec = 0;
1047                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1048                             if (rc == 1)
1049                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1050                                     NULL);
1051                         }
1052 #endif
1053                         connection_close( c );
1054
1055                 } else if ( rc == 0 ) {
1056                         void *ssl;
1057                         char *authid;
1058
1059                         c->c_needs_tls_accept = 0;
1060
1061                         /* we need to let SASL know */
1062                         ssl = (void *)ldap_pvt_tls_sb_handle( c->c_sb );
1063
1064                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1065                         if( c->c_tls_ssf > c->c_ssf ) {
1066                                 c->c_ssf = c->c_tls_ssf;
1067                         }
1068
1069                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1070                         slap_sasl_external( c, c->c_tls_ssf, authid );
1071                 }
1072                 connection_return( c );
1073                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1074                 return 0;
1075         }
1076 #endif
1077
1078 #ifdef HAVE_CYRUS_SASL
1079         if ( c->c_sasl_layers ) {
1080                 c->c_sasl_layers = 0;
1081
1082                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1083
1084                 if( rc != LDAP_SUCCESS ) {
1085 #ifdef NEW_LOGGING
1086                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1087                                    "connection_read: conn %d SASL install error %d, closing\n",
1088                                    c->c_connid, rc ));
1089 #else
1090                         Debug( LDAP_DEBUG_TRACE,
1091                                 "connection_read(%d): SASL install error "
1092                                 "error=%d id=%ld, closing\n",
1093                                 s, rc, c->c_connid );
1094 #endif
1095                         /* connections_mutex and c_mutex are locked */
1096                         connection_closing( c );
1097                         connection_close( c );
1098                         connection_return( c );
1099                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1100                         return 0;
1101                 }
1102         }
1103 #endif
1104
1105 #define CONNECTION_INPUT_LOOP 1
1106
1107 #ifdef DATA_READY_LOOP
1108         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1109 #elif CONNECTION_INPUT_LOOP
1110         while(!rc)
1111 #endif
1112         {
1113                 /* How do we do this without getting into a busy loop ? */
1114                 rc = connection_input( c );
1115         }
1116
1117         if( rc < 0 ) {
1118 #ifdef NEW_LOGGING
1119                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1120                            "connection_read: conn %d  input error %d, closing.\n",
1121                            c->c_connid, rc ));
1122 #else
1123                 Debug( LDAP_DEBUG_TRACE,
1124                         "connection_read(%d): input error=%d id=%ld, closing.\n",
1125                         s, rc, c->c_connid );
1126 #endif
1127                 /* connections_mutex and c_mutex are locked */
1128                 connection_closing( c );
1129                 connection_close( c );
1130                 connection_return( c );
1131                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1132                 return 0;
1133         }
1134
1135         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1136                 slapd_set_read( s, 1 );
1137         }
1138
1139         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1140                 slapd_set_write( s, 1 );
1141         }
1142
1143         connection_return( c );
1144         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1145         return 0;
1146 }
1147
1148 static int
1149 connection_input(
1150     Connection *conn
1151 )
1152 {
1153         Operation *op;
1154         ber_tag_t       tag;
1155         ber_len_t       len;
1156         ber_int_t       msgid;
1157         BerElement      *ber;
1158
1159         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1160             == NULL ) {
1161 #ifdef NEW_LOGGING
1162                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1163                            "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
1164 #else
1165                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1166 #endif
1167                 return -1;
1168         }
1169
1170         errno = 0;
1171
1172         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1173         if ( tag != LDAP_TAG_MESSAGE ) {
1174                 int err = errno;
1175                 ber_socket_t    sd;
1176
1177                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1178
1179 #ifdef NEW_LOGGING
1180                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1181                            "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
1182                            conn->c_connid, err, sock_errstr(err) ));
1183 #else
1184                 Debug( LDAP_DEBUG_TRACE,
1185                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1186                         sd, err, sock_errstr(err) );
1187 #endif
1188                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1189                         /* log, close and send error */
1190                         ber_free( conn->c_currentber, 1 );
1191                         conn->c_currentber = NULL;
1192
1193                         return -2;
1194                 }
1195                 return 1;
1196         }
1197
1198         ber = conn->c_currentber;
1199         conn->c_currentber = NULL;
1200
1201         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1202                 /* log, close and send error */
1203 #ifdef NEW_LOGGING
1204                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1205                            "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
1206                            conn->c_connid, tag ));
1207 #else
1208                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1209                     0 );
1210 #endif
1211                 ber_free( ber, 1 );
1212                 return -1;
1213         }
1214
1215         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1216                 /* log, close and send error */
1217 #ifdef NEW_LOGGING
1218                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1219                            "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
1220                            conn->c_connid, tag ));
1221 #else
1222                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1223                     0 );
1224 #endif
1225                 ber_free( ber, 1 );
1226
1227                 return -1;
1228         }
1229
1230         if(tag == LDAP_REQ_BIND) {
1231                 /* immediately abandon all exiting operations upon BIND */
1232                 connection_abandon( conn );
1233         }
1234
1235         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1236
1237         if ( conn->c_conn_state == SLAP_C_BINDING
1238                 || conn->c_conn_state == SLAP_C_CLOSING )
1239         {
1240 #ifdef NEW_LOGGING
1241                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1242                            "connection_input: conn %d  deferring operation\n",
1243                            conn->c_connid ));
1244 #else
1245                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1246 #endif
1247                 conn->c_n_ops_pending++;
1248                 slap_op_add( &conn->c_pending_ops, op );
1249
1250         } else {
1251                 conn->c_n_ops_executing++;
1252                 connection_op_activate( conn, op );
1253         }
1254
1255 #ifdef NO_THREADS
1256         if ( conn->c_struct_state != SLAP_C_USED ) {
1257                 /* connection must have got closed underneath us */
1258                 return 1;
1259         }
1260 #endif
1261         assert( conn->c_struct_state == SLAP_C_USED );
1262
1263         return 0;
1264 }
1265
1266 static int
1267 connection_resched( Connection *conn )
1268 {
1269         Operation *op;
1270
1271         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1272                 int rc;
1273                 ber_socket_t    sd;
1274                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1275
1276                 /* us trylock to avoid possible deadlock */
1277                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1278
1279                 if( rc ) {
1280 #ifdef NEW_LOGGING
1281                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1282                                    "connection_resched: conn %d  reaquiring locks.\n",
1283                                    conn->c_connid ));
1284 #else
1285                         Debug( LDAP_DEBUG_TRACE,
1286                                 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1287                                 conn->c_connid, sd, 0 );
1288 #endif
1289                         /*
1290                          * reaquire locks in the right order...
1291                          * this may allow another thread to close this connection,
1292                          * so recheck state below.
1293                          */
1294                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1295                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1296                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1297                 }
1298
1299                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1300 #ifdef NEW_LOGGING
1301                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1302                                    "connection_resched: conn %d  closed by other thread.\n",
1303                                    conn->c_connid ));
1304 #else
1305                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1306                                 "closed by other thread conn=%ld sd=%d\n",
1307                                 conn->c_connid, sd, 0 );
1308 #endif
1309                 } else {
1310 #ifdef NEW_LOGGING
1311                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1312                                    "connection_resched: conn %d  attempting closing.\n",
1313                                    conn->c_connid ));
1314 #else
1315                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1316                                 "attempting closing conn=%ld sd=%d\n",
1317                                 conn->c_connid, sd, 0 );
1318 #endif
1319                         connection_close( conn );
1320                 }
1321
1322                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1323                 return 0;
1324         }
1325
1326         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1327                 /* other states need different handling */
1328                 return 0;
1329         }
1330
1331         for( op = slap_op_pop( &conn->c_pending_ops );
1332                 op != NULL;
1333                 op = slap_op_pop( &conn->c_pending_ops ) )
1334         {
1335                 /* pending operations should not be marked for abandonment */
1336                 assert(!op->o_abandon);
1337
1338                 conn->c_n_ops_pending--;
1339                 conn->c_n_ops_executing++;
1340
1341                 connection_op_activate( conn, op );
1342
1343                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1344                         break;
1345                 }
1346         }
1347         return 0;
1348 }
1349
1350 static int connection_op_activate( Connection *conn, Operation *op )
1351 {
1352         struct co_arg *arg;
1353         int status;
1354         ber_tag_t tag = op->o_tag;
1355
1356         if(tag == LDAP_REQ_BIND) {
1357                 conn->c_conn_state = SLAP_C_BINDING;
1358         }
1359
1360         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1361         arg->co_conn = conn;
1362         arg->co_op = op;
1363
1364         arg->co_op->o_authz = conn->c_authz;
1365         arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1366         arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
1367         (void) dn_normalize( arg->co_op->o_ndn );
1368         arg->co_op->o_authtype = conn->c_authtype;
1369         arg->co_op->o_authmech = conn->c_authmech != NULL
1370                 ?  ch_strdup( conn->c_authmech ) : NULL;
1371
1372         arg->co_op->o_protocol = conn->c_protocol
1373                 ? conn->c_protocol : LDAP_VERSION3;
1374         arg->co_op->o_connid = conn->c_connid;
1375
1376         slap_op_add( &conn->c_ops, arg->co_op );
1377
1378         status = ldap_pvt_thread_pool_submit( &connection_pool,
1379                 connection_operation, (void *) arg );
1380
1381         if ( status != 0 ) {
1382 #ifdef NEW_LOGGING
1383                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1384                            "connection_op_activate: conn %d      thread pool submit failed.\n",
1385                            conn->c_connid ));
1386 #else
1387                 Debug( LDAP_DEBUG_ANY,
1388                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1389 #endif
1390                 /* should move op to pending list */
1391         }
1392
1393         return status;
1394 }
1395
1396 int connection_write(ber_socket_t s)
1397 {
1398         Connection *c;
1399         assert( connections != NULL );
1400
1401         ldap_pvt_thread_mutex_lock( &connections_mutex );
1402
1403         c = connection_get( s );
1404
1405         slapd_clr_write( s, 0);
1406
1407         if( c == NULL ) {
1408 #ifdef NEW_LOGGING
1409                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1410                            "connection_write: sock %ld  no connection!\n",(long)s));
1411 #else
1412                 Debug( LDAP_DEBUG_ANY,
1413                         "connection_write(%ld): no connection!\n",
1414                         (long) s, 0, 0 );
1415 #endif
1416                 slapd_remove(s, 0);
1417                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1418                 return -1;
1419         }
1420
1421         c->c_n_write++;
1422
1423 #ifdef NEW_LOGGING
1424         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1425                    "connection_write conn %d  waking output.\n",
1426                    c->c_connid ));
1427 #else
1428         Debug( LDAP_DEBUG_TRACE,
1429                 "connection_write(%d): waking output for id=%ld\n",
1430                 s, c->c_connid, 0 );
1431 #endif
1432         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1433
1434         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1435                 slapd_set_read( s, 1 );
1436         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1437                 slapd_set_write( s, 1 );
1438         connection_return( c );
1439         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1440         return 0;
1441 }
1442
1443
1444 /*
1445  * Create client side and server side connection structures, connected to
1446  * one another, for the front end to use for searches on arbitrary back ends.
1447  */
1448
1449 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1450 {
1451         int rc;
1452         ber_socket_t fd[2] = {-1,-1};
1453         Operation *op;
1454
1455         *conn=NULL;
1456         *ldp=NULL;
1457
1458         rc = lutil_pair( fd );
1459         if( rc == -1 ) {
1460                 return LDAP_OTHER;
1461         }
1462
1463         rc = connection_init( fd[1], "INT", "localhost",
1464       "localhost:0", "localhost:00", 0, 256, id );
1465         if( rc < 0 ) {
1466                 tcp_close( fd[0] );
1467                 tcp_close( fd[1] );
1468                 return LDAP_OTHER;
1469         }
1470         slapd_add_internal( fd[1] );
1471
1472         /* A search operation, number 0 */
1473         op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1474         op->o_ndn = ch_strdup( id );
1475         op->o_protocol = LDAP_VERSION3;
1476
1477         (*conn) = connection_get( fd[1] );
1478         (*conn)->c_ops = op;
1479     (*conn)->c_conn_state = SLAP_C_ACTIVE;
1480
1481
1482         /* Create the client side of the connection */
1483         rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1484         if( rc != LDAP_SUCCESS ) {
1485                 tcp_close( fd[0] );
1486                 return LDAP_OTHER;
1487         }
1488
1489         /* The connection_get() will have locked the connection's mutex */
1490         ldap_pvt_thread_mutex_unlock(  &((*conn)->c_mutex) );
1491
1492         return LDAP_SUCCESS;
1493 }
1494
1495
1496 void connection_internal_close( Connection *conn )
1497 {
1498         Operation *op = conn->c_ops;
1499
1500         slap_op_remove( &conn->c_ops, op );
1501         slap_op_free( op );
1502         connection_closing( conn );
1503         connection_close( conn );
1504 }