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