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 #include <ac/unistd.h>
  18
  19 #include "ldap_pvt.h"
  20 #include "lutil.h"
  21 #include "slap.h"
  22
  23 /* protected by connections_mutex */
  24 static ldap_pvt_thread_mutex_t connections_mutex;
  25 static Connection *connections = NULL;
  26 static unsigned long conn_nextid = 0;
  27
  28 /* structure state (protected by connections_mutex) */
  29 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  30 #define SLAP_C_UNUSED                   0x01
  31 #define SLAP_C_USED                             0x02
  32
  33 /* connection state (protected by c_mutex ) */
  34 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  35 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  36 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  37 #define SLAP_C_BINDING                  0x03    /* binding */
  38 #define SLAP_C_CLOSING                  0x04    /* closing */
  39
  40 const char *
  41 connection_state2str( int state )
  42 {
  43         switch( state ) {
  44         case SLAP_C_INVALID:    return "!";
  45         case SLAP_C_INACTIVE:   return "|";
  46         case SLAP_C_ACTIVE:             return "";
  47         case SLAP_C_BINDING:    return "B";
  48         case SLAP_C_CLOSING:    return "C";
  49         }
  50
  51         return "?";
  52 }
  53
  54 static Connection* connection_get( ber_socket_t s );
  55
  56 static int connection_input( Connection *c );
  57 static void connection_close( Connection *c );
  58
  59 static int connection_op_activate( Connection *conn, Operation *op );
  60 static int connection_resched( Connection *conn );
  61 static void connection_abandon( Connection *conn );
  62 static void connection_destroy( Connection *c );
  63
  64 struct co_arg {
  65         Connection      *co_conn;
  66         Operation       *co_op;
  67 };
  68
  69 /*
  70  * Initialize connection management infrastructure.
  71  */
  72 int connections_init(void)
  73 {
  74         assert( connections == NULL );
  75
  76         if( connections != NULL) {
  77 #ifdef NEW_LOGGING
  78                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  79                            "connections_init:  already initialized.\n" ));
  80 #else
  81                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  82                         0, 0, 0 );
  83 #endif
  84                 return -1;
  85         }
  86
  87         /* should check return of every call */
  88         ldap_pvt_thread_mutex_init( &connections_mutex );
  89
  90         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  91
  92         if( connections == NULL ) {
  93 #ifdef NEW_LOGGING
  94                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  95                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  96                            dtblsize, (long) sizeof(Connection) ));
  97 #else
  98                 Debug( LDAP_DEBUG_ANY,
  99                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 100                         dtblsize, (long) sizeof(Connection), 0 );
 101 #endif
 102                 return -1;
 103         }
 104
 105     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 106     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 107
 108         /*
 109          * per entry initialization of the Connection array initialization
 110          * will be done by connection_init()
 111          */
 112
 113         return 0;
 114 }
 115
 116 /*
 117  * Destroy connection management infrastructure.
 118  */
 119 int connections_destroy(void)
 120 {
 121         ber_socket_t i;
 122
 123         /* should check return of every call */
 124
 125         if( connections == NULL) {
 126 #ifdef NEW_LOGGING
 127                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 128                            "connections_destroy: nothing to destroy.\n"));
 129 #else
 130                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 131                         0, 0, 0 );
 132 #endif
 133                 return -1;
 134         }
 135
 136         for ( i = 0; i < dtblsize; i++ ) {
 137                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 138                         ber_sockbuf_free( connections[i].c_sb );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 141                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 142                 }
 143         }
 144
 145         free( connections );
 146         connections = NULL;
 147
 148         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 149         return 0;
 150 }
 151
 152 /*
 153  * shutdown all connections
 154  */
 155 int connections_shutdown(void)
 156 {
 157         ber_socket_t i;
 158
 159         ldap_pvt_thread_mutex_lock( &connections_mutex );
 160
 161         for ( i = 0; i < dtblsize; i++ ) {
 162                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 163                         continue;
 164                 }
 165
 166                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 167
 168                 /* connections_mutex and c_mutex are locked */
 169                 connection_closing( &connections[i] );
 170                 connection_close( &connections[i] );
 171
 172                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 173         }
 174
 175         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * Timeout idle connections.
 182  */
 183 int connections_timeout_idle(time_t now)
 184 {
 185         int i = 0;
 186         int connindex;
 187         Connection* c;
 188
 189         for( c = connection_first( &connindex );
 190                 c != NULL;
 191                 c = connection_next( c, &connindex ) )
 192         {
 193                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 194                         /* close it */
 195                         connection_closing( c );
 196                         connection_close( c );
 197                         i++;
 198                 }
 199         }
 200         connection_done( c );
 201
 202         return i;
 203 }
 204
 205 static Connection* connection_get( ber_socket_t s )
 206 {
 207         /* connections_mutex should be locked by caller */
 208
 209         Connection *c;
 210
 211 #ifdef NEW_LOGGING
 212         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 213                    "connection_get: socket %ld\n", (long)s ));
 214 #else
 215         Debug( LDAP_DEBUG_ARGS,
 216                 "connection_get(%ld)\n",
 217                 (long) s, 0, 0 );
 218 #endif
 219
 220         assert( connections != NULL );
 221
 222         if(s == AC_SOCKET_INVALID) {
 223                 return NULL;
 224         }
 225
 226 #ifndef HAVE_WINSOCK
 227         c = &connections[s];
 228
 229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 230
 231 #else
 232         c = NULL;
 233         {
 234                 ber_socket_t i, sd;
 235
 236                 for(i=0; i<dtblsize; i++) {
 237                         ber_sockbuf_ctrl( connections[i].c_sb,
 238                                 LBER_SB_OPT_GET_FD, &sd );
 239
 240                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 241                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 242                                 assert( connections[i].c_sb == 0 );
 243                                 break;
 244                         }
 245
 246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 248                                 assert( sd == AC_SOCKET_INVALID );
 249                                 continue;
 250                         }
 251
 252                         /* state can actually change from used -> unused by resched,
 253                          * so don't assert details here.
 254                          */
 255
 256                         if( sd == s ) {
 257                                 c = &connections[i];
 258                                 break;
 259                         }
 260                 }
 261         }
 262 #endif
 263
 264         if( c != NULL ) {
 265                 ber_socket_t    sd;
 266
 267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 268
 269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 270                 if( c->c_struct_state != SLAP_C_USED ) {
 271                         /* connection must have been closed due to resched */
 272
 273                         assert( c->c_conn_state == SLAP_C_INVALID );
 274                         assert( sd == AC_SOCKET_INVALID );
 275
 276 #ifdef NEW_LOGGING
 277                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 278                                    "connection_get:  connection %d not used\n", s ));
 279 #else
 280                         Debug( LDAP_DEBUG_TRACE,
 281                                 "connection_get(%d): connection not used\n",
 282                                 s, 0, 0 );
 283 #endif
 284
 285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 286                         return NULL;
 287                 }
 288
 289 #ifdef NEW_LOGGING
 290                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 291                            "connection_get: get for %d got connid %ld\n",s, c->c_connid ));
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%ld\n",
 295                         s, c->c_connid, 0 );
 296 #endif
 297
 298                 c->c_n_get++;
 299
 300                 assert( c->c_struct_state == SLAP_C_USED );
 301                 assert( c->c_conn_state != SLAP_C_INVALID );
 302                 assert( sd != AC_SOCKET_INVALID );
 303
 304 #ifdef SLAPD_MONITOR
 305                 c->c_activitytime = slap_get_time();
 306 #else
 307                 if( global_idletimeout > 0 ) {
 308                         c->c_activitytime = slap_get_time();
 309                 }
 310 #endif
 311         }
 312
 313         return c;
 314 }
 315
 316 static void connection_return( Connection *c )
 317 {
 318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319 }
 320
 321 long connection_init(
 322         ber_socket_t s,
 323         const char* url,
 324         const char* dnsname,
 325         const char* peername,
 326         const char* sockname,
 327         int tls_udp_option,
 328         slap_ssf_t ssf,
 329         const char *authid )
 330 {
 331         unsigned long id;
 332         Connection *c;
 333
 334         assert( connections != NULL );
 335
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338         assert( sockname != NULL );
 339
 340 #ifndef HAVE_TLS
 341         assert( tls_udp_option != 1 );
 342 #endif
 343
 344         if( s == AC_SOCKET_INVALID ) {
 345 #ifdef NEW_LOGGING
 346                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 347                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 348 #else
 349                 Debug( LDAP_DEBUG_ANY,
 350                        "connection_init(%ld): invalid.\n",
 351                        (long) s, 0, 0 );
 352 #endif
 353                 return -1;
 354         }
 355
 356         assert( s >= 0 );
 357 #ifndef HAVE_WINSOCK
 358         assert( s < dtblsize );
 359 #endif
 360
 361         ldap_pvt_thread_mutex_lock( &connections_mutex );
 362
 363 #ifndef HAVE_WINSOCK
 364         c = &connections[s];
 365
 366 #else
 367         {
 368                 ber_socket_t    i;
 369
 370                 c = NULL;
 371
 372         for( i=0; i < dtblsize; i++) {
 373                 ber_socket_t    sd;
 374
 375             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 376                 assert( connections[i].c_sb == 0 );
 377                 c = &connections[i];
 378                 break;
 379             }
 380
 381                         sd = AC_SOCKET_INVALID;
 382                         if (connections[i].c_sb != NULL)
 383                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 384
 385             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 386                 assert( sd == AC_SOCKET_INVALID );
 387                 c = &connections[i];
 388                 break;
 389             }
 390
 391             assert( connections[i].c_struct_state == SLAP_C_USED );
 392             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 393             assert( sd != AC_SOCKET_INVALID );
 394         }
 395
 396         if( c == NULL ) {
 397 #ifdef NEW_LOGGING
 398                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 399                            "connection_init: skt %d      connection table full (%d/%d)\n",
 400                            s, i, dtblsize ));
 401 #else
 402                 Debug( LDAP_DEBUG_ANY,
 403                                 "connection_init(%d): connection table full (%d/%d)\n",
 404                                 s, i, dtblsize);
 405 #endif
 406             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 407             return -1;
 408         }
 409     }
 410 #endif
 411
 412     assert( c != NULL );
 413
 414         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 415                 c->c_authmech = NULL;
 416                 c->c_dn = NULL;
 417                 c->c_ndn = NULL;
 418                 c->c_cdn = NULL;
 419                 c->c_groups = NULL;
 420
 421                 c->c_listener_url = NULL;
 422                 c->c_peer_domain = NULL;
 423                 c->c_peer_name = NULL;
 424                 c->c_sock_name = NULL;
 425
 426                 c->c_ops = NULL;
 427                 c->c_pending_ops = NULL;
 428
 429                 c->c_sasl_bind_mech = NULL;
 430                 c->c_sasl_context = NULL;
 431                 c->c_sasl_extra = NULL;
 432
 433                 c->c_sb = ber_sockbuf_alloc( );
 434
 435                 {
 436                         ber_len_t max = sockbuf_max_incoming;
 437                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 438                 }
 439
 440                 c->c_currentber = NULL;
 441
 442                 /* should check status of thread calls */
 443                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 444                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 445                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 446
 447                 c->c_struct_state = SLAP_C_UNUSED;
 448         }
 449
 450     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 451
 452     assert( c->c_struct_state == SLAP_C_UNUSED );
 453         assert( c->c_authmech == NULL );
 454     assert(     c->c_dn == NULL );
 455     assert(     c->c_ndn == NULL );
 456     assert(     c->c_cdn == NULL );
 457     assert( c->c_groups == NULL );
 458     assert( c->c_listener_url == NULL );
 459     assert( c->c_peer_domain == NULL );
 460     assert( c->c_peer_name == NULL );
 461     assert( c->c_sock_name == NULL );
 462     assert( c->c_ops == NULL );
 463     assert( c->c_pending_ops == NULL );
 464         assert( c->c_sasl_bind_mech == NULL );
 465         assert( c->c_sasl_context == NULL );
 466         assert( c->c_sasl_extra == NULL );
 467         assert( c->c_currentber == NULL );
 468
 469         c->c_listener_url = ch_strdup( url  );
 470         c->c_peer_domain = ch_strdup( dnsname  );
 471     c->c_peer_name = ch_strdup( peername  );
 472     c->c_sock_name = ch_strdup( sockname );
 473
 474     c->c_n_ops_received = 0;
 475     c->c_n_ops_executing = 0;
 476     c->c_n_ops_pending = 0;
 477     c->c_n_ops_completed = 0;
 478
 479         c->c_n_get = 0;
 480         c->c_n_read = 0;
 481         c->c_n_write = 0;
 482
 483         /* set to zero until bind, implies LDAP_VERSION3 */
 484         c->c_protocol = 0;
 485
 486 #ifdef SLAPD_MONITOR
 487         c->c_activitytime = c->c_starttime = slap_get_time();
 488 #else
 489         if( global_idletimeout > 0 ) {
 490                 c->c_activitytime = c->c_starttime = slap_get_time();
 491         }
 492 #endif
 493
 494 #ifdef LDAP_CONNECTIONLESS
 495         c->c_is_udp = 0;
 496         if (tls_udp_option == 2)
 497         {
 498                 c->c_is_udp = 1;
 499 #ifdef LDAP_DEBUG
 500         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 501                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 502 #endif
 503         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 504                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 505         } else
 506 #endif
 507         {
 508 #ifdef LDAP_DEBUG
 509         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 510                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 511 #endif
 512         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 513                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 514         }
 515         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 516                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 517
 518 #ifdef LDAP_DEBUG
 519         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 520                 INT_MAX, (void*)"ldap_" );
 521 #endif
 522
 523         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 524                 c /* non-NULL */ ) < 0 )
 525         {
 526 #ifdef NEW_LOGGING
 527                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 528                            "connection_init: conn %d  set nonblocking failed\n",
 529                            c->c_connid ));
 530 #else
 531                 Debug( LDAP_DEBUG_ANY,
 532                         "connection_init(%d, %s): set nonblocking failed\n",
 533                         s, c->c_peer_name, 0 );
 534 #endif
 535         }
 536
 537     id = c->c_connid = conn_nextid++;
 538
 539     c->c_conn_state = SLAP_C_INACTIVE;
 540     c->c_struct_state = SLAP_C_USED;
 541
 542         c->c_ssf = c->c_transport_ssf = ssf;
 543         c->c_tls_ssf = 0;
 544
 545 #ifdef HAVE_TLS
 546     if ( tls_udp_option == 1 ) {
 547             c->c_is_tls = 1;
 548             c->c_needs_tls_accept = 1;
 549     } else {
 550             c->c_is_tls = 0;
 551             c->c_needs_tls_accept = 0;
 552     }
 553 #endif
 554
 555         slap_sasl_open( c );
 556         slap_sasl_external( c, ssf, authid );
 557
 558     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 559     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 560
 561     backend_connection_init(c);
 562
 563     return id;
 564 }
 565
 566 void connection2anonymous( Connection *c )
 567 {
 568     assert( connections != NULL );
 569     assert( c != NULL );
 570
 571         {
 572                 ber_len_t max = sockbuf_max_incoming;
 573                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 574         }
 575
 576         if(c->c_authmech != NULL ) {
 577                 free(c->c_authmech);
 578                 c->c_authmech = NULL;
 579         }
 580
 581     if(c->c_dn != NULL) {
 582         free(c->c_dn);
 583         c->c_dn = NULL;
 584     }
 585     if(c->c_ndn != NULL) {
 586         free(c->c_ndn);
 587         c->c_ndn = NULL;
 588     }
 589
 590         if(c->c_cdn != NULL) {
 591                 free(c->c_cdn);
 592                 c->c_cdn = NULL;
 593         }
 594
 595         c->c_authc_backend = NULL;
 596         c->c_authz_backend = NULL;
 597
 598     {
 599         GroupAssertion *g, *n;
 600         for (g = c->c_groups; g; g=n)
 601         {
 602             n = g->next;
 603             free(g);
 604         }
 605         c->c_groups = NULL;
 606     }
 607
 608 }
 609
 610 static void
 611 connection_destroy( Connection *c )
 612 {
 613         /* note: connections_mutex should be locked by caller */
 614     ber_socket_t        sd;
 615
 616     assert( connections != NULL );
 617     assert( c != NULL );
 618     assert( c->c_struct_state != SLAP_C_UNUSED );
 619     assert( c->c_conn_state != SLAP_C_INVALID );
 620     assert( c->c_ops == NULL );
 621
 622     backend_connection_destroy(c);
 623
 624     c->c_protocol = 0;
 625     c->c_connid = -1;
 626
 627     c->c_activitytime = c->c_starttime = 0;
 628
 629         connection2anonymous( c );
 630
 631         if(c->c_listener_url != NULL) {
 632                 free(c->c_listener_url);
 633                 c->c_listener_url = NULL;
 634         }
 635
 636         if(c->c_peer_domain != NULL) {
 637                 free(c->c_peer_domain);
 638                 c->c_peer_domain = NULL;
 639         }
 640         if(c->c_peer_name != NULL) {
 641 #ifdef LDAP_PF_lOCAL
 642                 /*
 643                  * If peer was a domain socket, unlink. Mind you,
 644                  * they may be un-named. Should we leave this to
 645                  * the client?
 646                  */
 647                 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
 648                         char *path = c->c_peer_name + 5;
 649                         if (path != '\0') {
 650                                 (void)unlink(path);
 651                         }
 652                 }
 653 #endif /* LDAP_PF_LOCAL */
 654
 655                 free(c->c_peer_name);
 656                 c->c_peer_name = NULL;
 657         }
 658         if(c->c_sock_name != NULL) {
 659                 free(c->c_sock_name);
 660                 c->c_sock_name = NULL;
 661         }
 662
 663         c->c_sasl_bind_in_progress = 0;
 664         if(c->c_sasl_bind_mech != NULL) {
 665                 free(c->c_sasl_bind_mech);
 666                 c->c_sasl_bind_mech = NULL;
 667         }
 668
 669         slap_sasl_close( c );
 670
 671         if ( c->c_currentber != NULL ) {
 672                 ber_free( c->c_currentber, 1 );
 673                 c->c_currentber = NULL;
 674         }
 675
 676         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 677         if ( sd != AC_SOCKET_INVALID ) {
 678                 slapd_remove( sd, 0 );
 679
 680                 Statslog( LDAP_DEBUG_STATS,
 681                     "conn=%ld fd=%d closed\n",
 682                         c->c_connid, sd, 0, 0, 0 );
 683         }
 684
 685         ber_sockbuf_free( c->c_sb );
 686
 687         c->c_sb = ber_sockbuf_alloc( );
 688
 689         {
 690                 ber_len_t max = sockbuf_max_incoming;
 691                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 692         }
 693
 694     c->c_conn_state = SLAP_C_INVALID;
 695     c->c_struct_state = SLAP_C_UNUSED;
 696 }
 697
 698 int connection_state_closing( Connection *c )
 699 {
 700         /* c_mutex must be locked by caller */
 701
 702         int state;
 703         assert( c != NULL );
 704         assert( c->c_struct_state == SLAP_C_USED );
 705
 706         state = c->c_conn_state;
 707
 708         assert( state != SLAP_C_INVALID );
 709
 710         return state == SLAP_C_CLOSING;
 711 }
 712
 713 static void connection_abandon( Connection *c )
 714 {
 715         /* c_mutex must be locked by caller */
 716
 717         Operation *o;
 718
 719         for( o = c->c_ops; o != NULL; o = o->o_next ) {
 720                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 721                 o->o_abandon = 1;
 722                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 723         }
 724
 725         /* remove pending operations */
 726         for( o = slap_op_pop( &c->c_pending_ops );
 727                 o != NULL;
 728                 o = slap_op_pop( &c->c_pending_ops ) )
 729         {
 730                 slap_op_free( o );
 731         }
 732 }
 733
 734 void connection_closing( Connection *c )
 735 {
 736         assert( connections != NULL );
 737         assert( c != NULL );
 738         assert( c->c_struct_state == SLAP_C_USED );
 739         assert( c->c_conn_state != SLAP_C_INVALID );
 740
 741         /* c_mutex must be locked by caller */
 742
 743         if( c->c_conn_state != SLAP_C_CLOSING ) {
 744                 ber_socket_t    sd;
 745
 746                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 747 #ifdef NEW_LOGGING
 748                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 749                            "connection_closing: conn %d readying socket %d for close.\n",
 750                            c->c_connid, sd ));
 751 #else
 752                 Debug( LDAP_DEBUG_TRACE,
 753                         "connection_closing: readying conn=%ld sd=%d for close\n",
 754                         c->c_connid, sd, 0 );
 755 #endif
 756                 /* update state to closing */
 757                 c->c_conn_state = SLAP_C_CLOSING;
 758
 759                 /* don't listen on this port anymore */
 760                 slapd_clr_read( sd, 1 );
 761
 762                 /* abandon active operations */
 763                 connection_abandon( c );
 764
 765                 /* wake write blocked operations */
 766                 slapd_clr_write( sd, 1 );
 767                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 768         }
 769 }
 770
 771 static void connection_close( Connection *c )
 772 {
 773         ber_socket_t    sd;
 774
 775         assert( connections != NULL );
 776         assert( c != NULL );
 777         assert( c->c_struct_state == SLAP_C_USED );
 778         assert( c->c_conn_state == SLAP_C_CLOSING );
 779
 780         /* note: connections_mutex and c_mutex should be locked by caller */
 781
 782         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 783         if( c->c_ops != NULL ) {
 784 #ifdef NEW_LOGGING
 785                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 786                            "connection_close: conn %d  deferring sd %d\n",
 787                            c->c_connid, sd ));
 788 #else
 789                 Debug( LDAP_DEBUG_TRACE,
 790                         "connection_close: deferring conn=%ld sd=%d\n",
 791                         c->c_connid, sd, 0 );
 792 #endif
 793                 return;
 794         }
 795
 796 #ifdef NEW_LOGGING
 797         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 798                    "connection_close: conn %d  sd %d\n",
 799                    c->c_connid, sd ));
 800 #else
 801         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
 802                 c->c_connid, sd, 0 );
 803 #endif
 804         connection_destroy( c );
 805 }
 806
 807 unsigned long connections_nextid(void)
 808 {
 809         unsigned long id;
 810         assert( connections != NULL );
 811
 812         ldap_pvt_thread_mutex_lock( &connections_mutex );
 813
 814         id = conn_nextid;
 815
 816         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 817
 818         return id;
 819 }
 820
 821 Connection* connection_first( ber_socket_t *index )
 822 {
 823         assert( connections != NULL );
 824         assert( index != NULL );
 825
 826         ldap_pvt_thread_mutex_lock( &connections_mutex );
 827
 828         *index = 0;
 829
 830         return connection_next(NULL, index);
 831 }
 832
 833 Connection* connection_next( Connection *c, ber_socket_t *index )
 834 {
 835         assert( connections != NULL );
 836         assert( index != NULL );
 837         assert( *index <= dtblsize );
 838
 839         if( c != NULL ) {
 840                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 841         }
 842
 843         c = NULL;
 844
 845         for(; *index < dtblsize; (*index)++) {
 846                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 847                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 848 #ifndef HAVE_WINSOCK
 849                         continue;
 850 #else
 851                         break;
 852 #endif
 853                 }
 854
 855                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 856                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 857                         c = &connections[(*index)++];
 858                         break;
 859                 }
 860
 861                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 862                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 863         }
 864
 865         if( c != NULL ) {
 866                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 867         }
 868
 869         return c;
 870 }
 871
 872 void connection_done( Connection *c )
 873 {
 874         assert( connections != NULL );
 875
 876         if( c != NULL ) {
 877                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 878         }
 879
 880         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 881 }
 882
 883 /*
 884  * connection_activity - handle the request operation op on connection
 885  * conn.  This routine figures out what kind of operation it is and
 886  * calls the appropriate stub to handle it.
 887  */
 888
 889 static void *
 890 connection_operation( void *arg_v )
 891 {
 892         int rc;
 893         struct co_arg   *arg = arg_v;
 894         ber_tag_t tag = arg->co_op->o_tag;
 895         Connection *conn = arg->co_conn;
 896
 897         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 898         num_ops_initiated++;
 899         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 900
 901         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 902 #ifdef NEW_LOGGING
 903                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 904                            "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
 905                            conn->c_connid, (long)tag ));
 906 #else
 907                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 908                         "error: SASL bind in progress (tag=%ld).\n",
 909                         (long) tag, 0, 0 );
 910 #endif
 911                 send_ldap_result( conn, arg->co_op,
 912                         rc = LDAP_OPERATIONS_ERROR,
 913                         NULL, "SASL bind in progress", NULL, NULL );
 914                 goto operations_error;
 915         }
 916
 917         switch ( tag ) {
 918         case LDAP_REQ_BIND:
 919                 rc = do_bind( conn, arg->co_op );
 920                 break;
 921
 922         case LDAP_REQ_UNBIND:
 923                 rc = do_unbind( conn, arg->co_op );
 924                 break;
 925
 926         case LDAP_REQ_ADD:
 927                 rc = do_add( conn, arg->co_op );
 928                 break;
 929
 930         case LDAP_REQ_DELETE:
 931                 rc = do_delete( conn, arg->co_op );
 932                 break;
 933
 934         case LDAP_REQ_MODRDN:
 935                 rc = do_modrdn( conn, arg->co_op );
 936                 break;
 937
 938         case LDAP_REQ_MODIFY:
 939                 rc = do_modify( conn, arg->co_op );
 940                 break;
 941
 942         case LDAP_REQ_COMPARE:
 943                 rc = do_compare( conn, arg->co_op );
 944                 break;
 945
 946         case LDAP_REQ_SEARCH:
 947                 rc = do_search( conn, arg->co_op );
 948                 break;
 949
 950         case LDAP_REQ_ABANDON:
 951                 rc = do_abandon( conn, arg->co_op );
 952                 break;
 953
 954         case LDAP_REQ_EXTENDED:
 955                 rc = do_extended( conn, arg->co_op );
 956                 break;
 957
 958         default:
 959 #ifdef NEW_LOGGING
 960                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 961                            "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
 962                            conn->c_connid, tag ));
 963 #else
 964                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 965                     tag, 0, 0 );
 966 #endif
 967                 arg->co_op->o_tag = LBER_ERROR;
 968                 send_ldap_disconnect( conn, arg->co_op,
 969                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 970                 rc = -1;
 971                 break;
 972         }
 973
 974         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 975
 976 operations_error:
 977         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 978         num_ops_completed++;
 979         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 980
 981         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 982
 983         conn->c_n_ops_executing--;
 984         conn->c_n_ops_completed++;
 985
 986         slap_op_remove( &conn->c_ops, arg->co_op );
 987         slap_op_free( arg->co_op );
 988         arg->co_op = NULL;
 989         arg->co_conn = NULL;
 990         free( (char *) arg );
 991         arg = NULL;
 992
 993         switch( tag ) {
 994         case LBER_ERROR:
 995         case LDAP_REQ_UNBIND:
 996                 /* c_mutex is locked */
 997                 connection_closing( conn );
 998                 break;
 999
1000         case LDAP_REQ_BIND:
1001                 conn->c_sasl_bind_in_progress =
1002                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1003
1004                 if( conn->c_conn_state == SLAP_C_BINDING) {
1005                         conn->c_conn_state = SLAP_C_ACTIVE;
1006                 }
1007         }
1008
1009         connection_resched( conn );
1010
1011         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1012
1013         return NULL;
1014 }
1015
1016 int connection_read(ber_socket_t s)
1017 {
1018         int rc = 0;
1019         Connection *c;
1020         assert( connections != NULL );
1021
1022         ldap_pvt_thread_mutex_lock( &connections_mutex );
1023
1024         /* get (locked) connection */
1025         c = connection_get( s );
1026
1027         if( c == NULL ) {
1028 #ifdef NEW_LOGGING
1029                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1030                            "connection_read: sock %ld no connection\n",
1031                            (long)s ));
1032 #else
1033                 Debug( LDAP_DEBUG_ANY,
1034                         "connection_read(%ld): no connection!\n",
1035                         (long) s, 0, 0 );
1036 #endif
1037                 slapd_remove(s, 0);
1038
1039                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1040                 return -1;
1041         }
1042
1043         c->c_n_read++;
1044
1045         if( c->c_conn_state == SLAP_C_CLOSING ) {
1046 #ifdef NEW_LOGGING
1047                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1048                            "connection_read: conn %d connection closing, ignoring input\n",
1049                            c->c_connid));
1050 #else
1051                 Debug( LDAP_DEBUG_TRACE,
1052                         "connection_read(%d): closing, ignoring input for id=%ld\n",
1053                         s, c->c_connid, 0 );
1054 #endif
1055                 connection_return( c );
1056                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1057                 return 0;
1058         }
1059
1060 #ifdef NEW_LOGGING
1061         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1062                    "connection_read: conn %d  checking for input.\n", c->c_connid ));
1063 #else
1064         Debug( LDAP_DEBUG_TRACE,
1065                 "connection_read(%d): checking for input on id=%ld\n",
1066                 s, c->c_connid, 0 );
1067 #endif
1068
1069 #ifdef HAVE_TLS
1070         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1071                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1072                 if ( rc < 0 ) {
1073 #if 0 /* required by next #if 0 */
1074                         struct timeval tv;
1075                         fd_set rfd;
1076 #endif
1077
1078 #ifdef NEW_LOGGING
1079                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1080                                    "connection_read: conn %d  TLS accept error, error %d\n",
1081                                    c->c_connid, rc ));
1082 #else
1083                         Debug( LDAP_DEBUG_TRACE,
1084                                 "connection_read(%d): TLS accept error "
1085                                 "error=%d id=%ld, closing\n",
1086                                 s, rc, c->c_connid );
1087 #endif
1088                         c->c_needs_tls_accept = 0;
1089                         /* connections_mutex and c_mutex are locked */
1090                         connection_closing( c );
1091
1092 #if 0
1093                         /* Drain input before close, to allow SSL error codes
1094                          * to propagate to client. */
1095                         FD_ZERO(&rfd);
1096                         FD_SET(s, &rfd);
1097                         for (rc=1; rc>0;)
1098                         {
1099                             tv.tv_sec = 1;
1100                             tv.tv_usec = 0;
1101                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1102                             if (rc == 1)
1103                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1104                                     NULL);
1105                         }
1106 #endif
1107                         connection_close( c );
1108
1109                 } else if ( rc == 0 ) {
1110                         void *ssl;
1111                         char *authid;
1112
1113                         c->c_needs_tls_accept = 0;
1114
1115                         /* we need to let SASL know */
1116                         ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1117
1118                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1119                         if( c->c_tls_ssf > c->c_ssf ) {
1120                                 c->c_ssf = c->c_tls_ssf;
1121                         }
1122
1123                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1124                         slap_sasl_external( c, c->c_tls_ssf, authid );
1125                 }
1126                 connection_return( c );
1127                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1128                 return 0;
1129         }
1130 #endif
1131
1132 #ifdef HAVE_CYRUS_SASL
1133         if ( c->c_sasl_layers ) {
1134                 c->c_sasl_layers = 0;
1135
1136                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1137
1138                 if( rc != LDAP_SUCCESS ) {
1139 #ifdef NEW_LOGGING
1140                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1141                                    "connection_read: conn %d SASL install error %d, closing\n",
1142                                    c->c_connid, rc ));
1143 #else
1144                         Debug( LDAP_DEBUG_TRACE,
1145                                 "connection_read(%d): SASL install error "
1146                                 "error=%d id=%ld, closing\n",
1147                                 s, rc, c->c_connid );
1148 #endif
1149                         /* connections_mutex and c_mutex are locked */
1150                         connection_closing( c );
1151                         connection_close( c );
1152                         connection_return( c );
1153                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1154                         return 0;
1155                 }
1156         }
1157 #endif
1158
1159 #define CONNECTION_INPUT_LOOP 1
1160
1161 #ifdef DATA_READY_LOOP
1162         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1163 #elif CONNECTION_INPUT_LOOP
1164         while(!rc)
1165 #endif
1166         {
1167                 /* How do we do this without getting into a busy loop ? */
1168                 rc = connection_input( c );
1169         }
1170
1171         if( rc < 0 ) {
1172 #ifdef NEW_LOGGING
1173                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1174                            "connection_read: conn %d  input error %d, closing.\n",
1175                            c->c_connid, rc ));
1176 #else
1177                 Debug( LDAP_DEBUG_TRACE,
1178                         "connection_read(%d): input error=%d id=%ld, closing.\n",
1179                         s, rc, c->c_connid );
1180 #endif
1181                 /* connections_mutex and c_mutex are locked */
1182                 connection_closing( c );
1183                 connection_close( c );
1184                 connection_return( c );
1185                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1186                 return 0;
1187         }
1188
1189         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1190                 slapd_set_read( s, 1 );
1191         }
1192
1193         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1194                 slapd_set_write( s, 1 );
1195         }
1196
1197         connection_return( c );
1198         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1199         return 0;
1200 }
1201
1202 static int
1203 connection_input(
1204     Connection *conn
1205 )
1206 {
1207         Operation *op;
1208         ber_tag_t       tag;
1209         ber_len_t       len;
1210         ber_int_t       msgid;
1211         BerElement      *ber;
1212 #ifdef LDAP_CONNECTIONLESS
1213         Sockaddr        peeraddr;
1214         char            *cdn = NULL;
1215 #endif
1216
1217         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1218             == NULL ) {
1219 #ifdef NEW_LOGGING
1220                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1221                            "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
1222 #else
1223                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1224 #endif
1225                 return -1;
1226         }
1227
1228         errno = 0;
1229
1230 #ifdef LDAP_CONNECTIONLESS
1231         if (conn->c_is_udp)
1232         {
1233                 char    peername[sizeof("IP=255.255.255.255:65336")];
1234                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1235                         sizeof(struct sockaddr));
1236                 if (len != sizeof(struct sockaddr))
1237                         return 1;
1238                 sprintf( peername, "IP=%s:%d",
1239                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1240                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1241                 Statslog( LDAP_DEBUG_STATS,
1242                             "conn=%ld UDP request from %s (%s) accepted.\n",
1243                             conn->c_connid, peername,
1244                             conn->c_sock_name, 0, 0 );
1245         }
1246 #endif
1247         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1248         if ( tag != LDAP_TAG_MESSAGE ) {
1249                 int err = errno;
1250                 ber_socket_t    sd;
1251
1252                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1253
1254 #ifdef NEW_LOGGING
1255                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1256                            "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
1257                            conn->c_connid, err, sock_errstr(err) ));
1258 #else
1259                 Debug( LDAP_DEBUG_TRACE,
1260                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1261                         sd, err, sock_errstr(err) );
1262 #endif
1263                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1264                         /* log, close and send error */
1265                         ber_free( conn->c_currentber, 1 );
1266                         conn->c_currentber = NULL;
1267
1268                         return -2;
1269                 }
1270                 return 1;
1271         }
1272
1273         ber = conn->c_currentber;
1274         conn->c_currentber = NULL;
1275
1276         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1277                 /* log, close and send error */
1278 #ifdef NEW_LOGGING
1279                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1280                            "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
1281                            conn->c_connid, tag ));
1282 #else
1283                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1284                     0 );
1285 #endif
1286                 ber_free( ber, 1 );
1287                 return -1;
1288         }
1289
1290         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1291                 /* log, close and send error */
1292 #ifdef NEW_LOGGING
1293                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1294                            "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
1295                            conn->c_connid, tag ));
1296 #else
1297                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1298                     0 );
1299 #endif
1300                 ber_free( ber, 1 );
1301
1302                 return -1;
1303         }
1304
1305 #ifdef LDAP_CONNECTIONLESS
1306         if (conn->c_is_udp) {
1307                 if (tag == LBER_OCTETSTRING) {
1308                         ber_get_stringa( ber, &cdn );
1309                         tag = ber_peek_tag(ber, &len);
1310                 }
1311                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1312 #ifdef NEW_LOGGING
1313                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1314                                "connection_input: conn %d  invalid req for UDP 0x%lx.\n",
1315                                conn->c_connid, tag ));
1316 #else
1317                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1318                         0 );
1319 #endif
1320                     ber_free( ber, 1 );
1321                     return 0;
1322                 }
1323         }
1324 #endif
1325         if(tag == LDAP_REQ_BIND) {
1326                 /* immediately abandon all exiting operations upon BIND */
1327                 connection_abandon( conn );
1328         }
1329
1330         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1331
1332 #ifdef LDAP_CONNECTIONLESS
1333         op->o_peeraddr = peeraddr;
1334         if (cdn) {
1335             op->o_dn = cdn;
1336             op->o_protocol = LDAP_VERSION2;
1337         }
1338 #endif
1339         if ( conn->c_conn_state == SLAP_C_BINDING
1340                 || conn->c_conn_state == SLAP_C_CLOSING )
1341         {
1342 #ifdef NEW_LOGGING
1343                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1344                            "connection_input: conn %d  deferring operation\n",
1345                            conn->c_connid ));
1346 #else
1347                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1348 #endif
1349                 conn->c_n_ops_pending++;
1350                 slap_op_add( &conn->c_pending_ops, op );
1351
1352         } else {
1353                 conn->c_n_ops_executing++;
1354                 connection_op_activate( conn, op );
1355         }
1356
1357 #ifdef NO_THREADS
1358         if ( conn->c_struct_state != SLAP_C_USED ) {
1359                 /* connection must have got closed underneath us */
1360                 return 1;
1361         }
1362 #endif
1363         assert( conn->c_struct_state == SLAP_C_USED );
1364
1365         return 0;
1366 }
1367
1368 static int
1369 connection_resched( Connection *conn )
1370 {
1371         Operation *op;
1372
1373         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1374                 int rc;
1375                 ber_socket_t    sd;
1376                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1377
1378                 /* us trylock to avoid possible deadlock */
1379                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1380
1381                 if( rc ) {
1382 #ifdef NEW_LOGGING
1383                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1384                                    "connection_resched: conn %d  reaquiring locks.\n",
1385                                    conn->c_connid ));
1386 #else
1387                         Debug( LDAP_DEBUG_TRACE,
1388                                 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1389                                 conn->c_connid, sd, 0 );
1390 #endif
1391                         /*
1392                          * reaquire locks in the right order...
1393                          * this may allow another thread to close this connection,
1394                          * so recheck state below.
1395                          */
1396                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1397                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1398                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1399                 }
1400
1401                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1402 #ifdef NEW_LOGGING
1403                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1404                                    "connection_resched: conn %d  closed by other thread.\n",
1405                                    conn->c_connid ));
1406 #else
1407                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1408                                 "closed by other thread conn=%ld sd=%d\n",
1409                                 conn->c_connid, sd, 0 );
1410 #endif
1411                 } else {
1412 #ifdef NEW_LOGGING
1413                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1414                                    "connection_resched: conn %d  attempting closing.\n",
1415                                    conn->c_connid ));
1416 #else
1417                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1418                                 "attempting closing conn=%ld sd=%d\n",
1419                                 conn->c_connid, sd, 0 );
1420 #endif
1421                         connection_close( conn );
1422                 }
1423
1424                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1425                 return 0;
1426         }
1427
1428         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1429                 /* other states need different handling */
1430                 return 0;
1431         }
1432
1433         for( op = slap_op_pop( &conn->c_pending_ops );
1434                 op != NULL;
1435                 op = slap_op_pop( &conn->c_pending_ops ) )
1436         {
1437                 /* pending operations should not be marked for abandonment */
1438                 assert(!op->o_abandon);
1439
1440                 conn->c_n_ops_pending--;
1441                 conn->c_n_ops_executing++;
1442
1443                 connection_op_activate( conn, op );
1444
1445                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1446                         break;
1447                 }
1448         }
1449         return 0;
1450 }
1451
1452 static int connection_op_activate( Connection *conn, Operation *op )
1453 {
1454         struct co_arg *arg;
1455         int status;
1456         ber_tag_t tag = op->o_tag;
1457
1458         if(tag == LDAP_REQ_BIND) {
1459                 conn->c_conn_state = SLAP_C_BINDING;
1460         }
1461
1462         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1463         arg->co_conn = conn;
1464         arg->co_op = op;
1465
1466         if (!arg->co_op->o_dn) {
1467             arg->co_op->o_authz = conn->c_authz;
1468             arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1469             arg->co_op->o_ndn = ch_strdup( conn->c_ndn != NULL ? conn->c_ndn : "" );
1470         }
1471         arg->co_op->o_authtype = conn->c_authtype;
1472         arg->co_op->o_authmech = conn->c_authmech != NULL
1473                 ?  ch_strdup( conn->c_authmech ) : NULL;
1474
1475         if (!arg->co_op->o_protocol) {
1476             arg->co_op->o_protocol = conn->c_protocol
1477                 ? conn->c_protocol : LDAP_VERSION3;
1478         }
1479         arg->co_op->o_connid = conn->c_connid;
1480
1481         slap_op_add( &conn->c_ops, arg->co_op );
1482
1483         status = ldap_pvt_thread_pool_submit( &connection_pool,
1484                 connection_operation, (void *) arg );
1485
1486         if ( status != 0 ) {
1487 #ifdef NEW_LOGGING
1488                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1489                            "connection_op_activate: conn %d      thread pool submit failed.\n",
1490                            conn->c_connid ));
1491 #else
1492                 Debug( LDAP_DEBUG_ANY,
1493                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1494 #endif
1495                 /* should move op to pending list */
1496         }
1497
1498         return status;
1499 }
1500
1501 int connection_write(ber_socket_t s)
1502 {
1503         Connection *c;
1504         assert( connections != NULL );
1505
1506         ldap_pvt_thread_mutex_lock( &connections_mutex );
1507
1508         c = connection_get( s );
1509
1510         slapd_clr_write( s, 0);
1511
1512         if( c == NULL ) {
1513 #ifdef NEW_LOGGING
1514                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1515                            "connection_write: sock %ld  no connection!\n",(long)s));
1516 #else
1517                 Debug( LDAP_DEBUG_ANY,
1518                         "connection_write(%ld): no connection!\n",
1519                         (long) s, 0, 0 );
1520 #endif
1521                 slapd_remove(s, 0);
1522                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1523                 return -1;
1524         }
1525
1526         c->c_n_write++;
1527
1528 #ifdef NEW_LOGGING
1529         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1530                    "connection_write conn %d  waking output.\n",
1531                    c->c_connid ));
1532 #else
1533         Debug( LDAP_DEBUG_TRACE,
1534                 "connection_write(%d): waking output for id=%ld\n",
1535                 s, c->c_connid, 0 );
1536 #endif
1537         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1538
1539         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1540                 slapd_set_read( s, 1 );
1541         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1542                 slapd_set_write( s, 1 );
1543         connection_return( c );
1544         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1545         return 0;
1546 }
1547
1548
1549 /*
1550  * Create client side and server side connection structures, connected to
1551  * one another, for the front end to use for searches on arbitrary back ends.
1552  */
1553
1554 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1555 {
1556         int rc;
1557         ber_socket_t fd[2] = {-1,-1};
1558         Operation *op;
1559
1560         *conn=NULL;
1561         *ldp=NULL;
1562
1563         rc = lutil_pair( fd );
1564         if( rc == -1 ) {
1565                 return LDAP_OTHER;
1566         }
1567
1568         rc = connection_init( fd[1], "INT", "localhost",
1569       "localhost:0", "localhost:00", 0, 256, id );
1570         if( rc < 0 ) {
1571                 tcp_close( fd[0] );
1572                 tcp_close( fd[1] );
1573                 return LDAP_OTHER;
1574         }
1575         slapd_add_internal( fd[1] );
1576
1577         /* A search operation, number 0 */
1578         op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1579         op->o_ndn = ch_strdup( id );
1580         op->o_protocol = LDAP_VERSION3;
1581
1582         (*conn) = connection_get( fd[1] );
1583         (*conn)->c_ops = op;
1584     (*conn)->c_conn_state = SLAP_C_ACTIVE;
1585
1586
1587         /* Create the client side of the connection */
1588         rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1589         if( rc != LDAP_SUCCESS ) {
1590                 tcp_close( fd[0] );
1591                 return LDAP_OTHER;
1592         }
1593
1594         /* The connection_get() will have locked the connection's mutex */
1595         ldap_pvt_thread_mutex_unlock(  &((*conn)->c_mutex) );
1596
1597         return LDAP_SUCCESS;
1598 }
1599
1600
1601 void connection_internal_close( Connection *conn )
1602 {
1603         Operation *op = conn->c_ops;
1604
1605         slap_op_remove( &conn->c_ops, op );
1606         slap_op_free( op );
1607         connection_closing( conn );
1608         connection_close( conn );
1609 }