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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 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/string.h>
  15 #include <ac/time.h>
  16 #include <ac/unistd.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( 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 static ldap_pvt_thread_start_t connection_operation;
  64
  65 /*
  66  * Initialize connection management infrastructure.
  67  */
  68 int connections_init(void)
  69 {
  70         assert( connections == NULL );
  71
  72         if( connections != NULL) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( CONNECTION, INFO,
  75                            "connections_init:  already initialized.\n", 0, 0, 0 );
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  78                         0, 0, 0 );
  79 #endif
  80                 return -1;
  81         }
  82
  83         /* should check return of every call */
  84         ldap_pvt_thread_mutex_init( &connections_mutex );
  85
  86         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
  87
  88         if( connections == NULL ) {
  89 #ifdef NEW_LOGGING
  90                 LDAP_LOG( CONNECTION, ERR,
  91                            "connections_init: allocation (%d * %ld) of connection "
  92                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
  93 #else
  94                 Debug( LDAP_DEBUG_ANY,
  95                         "connections_init: allocation (%d*%ld) of connection array failed\n",
  96                         dtblsize, (long) sizeof(Connection), 0 );
  97 #endif
  98                 return -1;
  99         }
 100
 101     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 102     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 103
 104         /*
 105          * per entry initialization of the Connection array initialization
 106          * will be done by connection_init()
 107          */
 108
 109         return 0;
 110 }
 111
 112 /*
 113  * Destroy connection management infrastructure.
 114  */
 115 int connections_destroy(void)
 116 {
 117         ber_socket_t i;
 118
 119         /* should check return of every call */
 120
 121         if( connections == NULL) {
 122 #ifdef NEW_LOGGING
 123                 LDAP_LOG( CONNECTION, INFO,
 124                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 125 #else
 126                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 127                         0, 0, 0 );
 128 #endif
 129                 return -1;
 130         }
 131
 132         for ( i = 0; i < dtblsize; i++ ) {
 133                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 134                         ber_sockbuf_free( connections[i].c_sb );
 135                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 136                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 137                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 138                 }
 139         }
 140
 141         free( connections );
 142         connections = NULL;
 143
 144         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 145         return 0;
 146 }
 147
 148 /*
 149  * shutdown all connections
 150  */
 151 int connections_shutdown(void)
 152 {
 153         ber_socket_t i;
 154
 155         ldap_pvt_thread_mutex_lock( &connections_mutex );
 156
 157         for ( i = 0; i < dtblsize; i++ ) {
 158                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 159                         continue;
 160                 }
 161
 162                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 163
 164                 /* connections_mutex and c_mutex are locked */
 165                 connection_closing( &connections[i] );
 166                 connection_close( &connections[i] );
 167
 168                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 169         }
 170
 171         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 172
 173         return 0;
 174 }
 175
 176 /*
 177  * Timeout idle connections.
 178  */
 179 int connections_timeout_idle(time_t now)
 180 {
 181         int i = 0;
 182         int connindex;
 183         Connection* c;
 184
 185         for( c = connection_first( &connindex );
 186                 c != NULL;
 187                 c = connection_next( c, &connindex ) )
 188         {
 189                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 190                         /* close it */
 191                         connection_closing( c );
 192                         connection_close( c );
 193                         i++;
 194                 }
 195         }
 196         connection_done( c );
 197
 198         return i;
 199 }
 200
 201 static Connection* connection_get( ber_socket_t s )
 202 {
 203         /* connections_mutex should be locked by caller */
 204
 205         Connection *c;
 206
 207 #ifdef NEW_LOGGING
 208         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 209 #else
 210         Debug( LDAP_DEBUG_ARGS,
 211                 "connection_get(%ld)\n",
 212                 (long) s, 0, 0 );
 213 #endif
 214
 215         assert( connections != NULL );
 216
 217         if(s == AC_SOCKET_INVALID) {
 218                 return NULL;
 219         }
 220
 221 #ifndef HAVE_WINSOCK
 222         c = &connections[s];
 223
 224         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 225
 226 #else
 227         c = NULL;
 228         {
 229                 ber_socket_t i, sd;
 230
 231                 for(i=0; i<dtblsize; i++) {
 232                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 233                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 234                                 assert( connections[i].c_sb == 0 );
 235                                 break;
 236                         }
 237
 238                         ber_sockbuf_ctrl( connections[i].c_sb,
 239                                 LBER_SB_OPT_GET_FD, &sd );
 240
 241                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 242                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 243                                 assert( sd == AC_SOCKET_INVALID );
 244                                 continue;
 245                         }
 246
 247                         /* state can actually change from used -> unused by resched,
 248                          * so don't assert details here.
 249                          */
 250
 251                         if( sd == s ) {
 252                                 c = &connections[i];
 253                                 break;
 254                         }
 255                 }
 256         }
 257 #endif
 258
 259         if( c != NULL ) {
 260                 ber_socket_t    sd;
 261
 262                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 263
 264                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 265                 if( c->c_struct_state != SLAP_C_USED ) {
 266                         /* connection must have been closed due to resched */
 267
 268                         assert( c->c_conn_state == SLAP_C_INVALID );
 269                         assert( sd == AC_SOCKET_INVALID );
 270
 271 #ifdef NEW_LOGGING
 272                         LDAP_LOG( CONNECTION, ARGS,
 273                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 274 #else
 275                         Debug( LDAP_DEBUG_TRACE,
 276                                 "connection_get(%d): connection not used\n",
 277                                 s, 0, 0 );
 278 #endif
 279
 280                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 281                         return NULL;
 282                 }
 283
 284 #ifdef NEW_LOGGING
 285                 LDAP_LOG( CONNECTION, RESULTS,
 286                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 287 #else
 288                 Debug( LDAP_DEBUG_TRACE,
 289                         "connection_get(%d): got connid=%lu\n",
 290                         s, c->c_connid, 0 );
 291 #endif
 292
 293                 c->c_n_get++;
 294
 295                 assert( c->c_struct_state == SLAP_C_USED );
 296                 assert( c->c_conn_state != SLAP_C_INVALID );
 297                 assert( sd != AC_SOCKET_INVALID );
 298
 299 #ifdef SLAPD_MONITOR
 300                 c->c_activitytime = slap_get_time();
 301 #else
 302                 if( global_idletimeout > 0 ) {
 303                         c->c_activitytime = slap_get_time();
 304                 }
 305 #endif
 306         }
 307
 308         return c;
 309 }
 310
 311 static void connection_return( Connection *c )
 312 {
 313         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 314 }
 315
 316 long connection_init(
 317         ber_socket_t s,
 318         Listener *listener,
 319         const char* dnsname,
 320         const char* peername,
 321         int tls_udp_option,
 322         slap_ssf_t ssf,
 323         const char *authid )
 324 {
 325         unsigned long id;
 326         Connection *c;
 327
 328         assert( connections != NULL );
 329
 330         assert( listener != NULL );
 331         assert( dnsname != NULL );
 332         assert( peername != NULL );
 333
 334 #ifndef HAVE_TLS
 335         assert( tls_udp_option != 1 );
 336 #endif
 337
 338         if( s == AC_SOCKET_INVALID ) {
 339 #ifdef NEW_LOGGING
 340                 LDAP_LOG( CONNECTION, INFO,
 341                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 342 #else
 343                 Debug( LDAP_DEBUG_ANY,
 344                        "connection_init(%ld): invalid.\n",
 345                        (long) s, 0, 0 );
 346 #endif
 347                 return -1;
 348         }
 349
 350         assert( s >= 0 );
 351 #ifndef HAVE_WINSOCK
 352         assert( s < dtblsize );
 353 #endif
 354
 355         ldap_pvt_thread_mutex_lock( &connections_mutex );
 356
 357 #ifndef HAVE_WINSOCK
 358         c = &connections[s];
 359
 360 #else
 361         {
 362                 ber_socket_t    i;
 363
 364                 c = NULL;
 365
 366         for( i=0; i < dtblsize; i++) {
 367                 ber_socket_t    sd;
 368
 369             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 370                 assert( connections[i].c_sb == 0 );
 371                 c = &connections[i];
 372                 break;
 373             }
 374
 375                         sd = AC_SOCKET_INVALID;
 376                         if (connections[i].c_sb != NULL)
 377                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 378
 379             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 380                 assert( sd == AC_SOCKET_INVALID );
 381                 c = &connections[i];
 382                 break;
 383             }
 384
 385             assert( connections[i].c_struct_state == SLAP_C_USED );
 386             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 387             assert( sd != AC_SOCKET_INVALID );
 388         }
 389
 390         if( c == NULL ) {
 391 #ifdef NEW_LOGGING
 392                 LDAP_LOG( CONNECTION, INFO,
 393                            "connection_init: skt %d connection table full "
 394                            "(%d/%d)\n", s, i, dtblsize );
 395 #else
 396                 Debug( LDAP_DEBUG_ANY,
 397                                 "connection_init(%d): connection table full "
 398                                 "(%d/%d)\n", s, i, dtblsize);
 399 #endif
 400             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 401             return -1;
 402         }
 403         }
 404 #endif
 405
 406         assert( c != NULL );
 407
 408         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 409                 c->c_send_ldap_result = slap_send_ldap_result;
 410                 c->c_send_search_entry = slap_send_search_entry;
 411                 c->c_send_search_reference = slap_send_search_reference;
 412                 c->c_send_ldap_extended = slap_send_ldap_extended;
 413 #ifdef LDAP_RES_INTERMEDIATE_RESP
 414                 c->c_send_ldap_intermediate_resp = slap_send_ldap_intermediate_resp;
 415 #endif
 416
 417                 c->c_authmech.bv_val = NULL;
 418                 c->c_authmech.bv_len = 0;
 419                 c->c_dn.bv_val = NULL;
 420                 c->c_dn.bv_len = 0;
 421                 c->c_ndn.bv_val = NULL;
 422                 c->c_ndn.bv_len = 0;
 423                 c->c_groups = NULL;
 424
 425                 c->c_listener = NULL;
 426                 c->c_peer_domain.bv_val = NULL;
 427                 c->c_peer_domain.bv_len = 0;
 428                 c->c_peer_name.bv_val = NULL;
 429                 c->c_peer_name.bv_len = 0;
 430
 431                 LDAP_STAILQ_INIT(&c->c_ops);
 432                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 433
 434                 c->c_sasl_bind_mech.bv_val = NULL;
 435                 c->c_sasl_bind_mech.bv_len = 0;
 436                 c->c_sasl_context = NULL;
 437                 c->c_sasl_extra = NULL;
 438                 c->c_sasl_bindop = NULL;
 439
 440                 c->c_sb = ber_sockbuf_alloc( );
 441
 442                 {
 443                         ber_len_t max = sockbuf_max_incoming;
 444                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 445                 }
 446
 447                 c->c_currentber = NULL;
 448
 449                 /* should check status of thread calls */
 450                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 451                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 452                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 453
 454                 c->c_struct_state = SLAP_C_UNUSED;
 455         }
 456
 457     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 458
 459     assert( c->c_struct_state == SLAP_C_UNUSED );
 460     assert( c->c_authmech.bv_val == NULL );
 461     assert( c->c_dn.bv_val == NULL );
 462     assert( c->c_ndn.bv_val == NULL );
 463     assert( c->c_groups == NULL );
 464     assert( c->c_listener == NULL );
 465     assert( c->c_peer_domain.bv_val == NULL );
 466     assert( c->c_peer_name.bv_val == NULL );
 467     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 468     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 469         assert( c->c_sasl_bind_mech.bv_val == NULL );
 470         assert( c->c_sasl_context == NULL );
 471         assert( c->c_sasl_extra == NULL );
 472         assert( c->c_sasl_bindop == NULL );
 473         assert( c->c_currentber == NULL );
 474
 475         c->c_listener = listener;
 476         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 477         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 478
 479     c->c_n_ops_received = 0;
 480     c->c_n_ops_executing = 0;
 481     c->c_n_ops_pending = 0;
 482     c->c_n_ops_completed = 0;
 483
 484         c->c_n_get = 0;
 485         c->c_n_read = 0;
 486         c->c_n_write = 0;
 487
 488         /* set to zero until bind, implies LDAP_VERSION3 */
 489         c->c_protocol = 0;
 490
 491 #ifdef SLAPD_MONITOR
 492         c->c_activitytime = c->c_starttime = slap_get_time();
 493 #else
 494         if( global_idletimeout > 0 ) {
 495                 c->c_activitytime = c->c_starttime = slap_get_time();
 496         }
 497 #endif
 498
 499 #ifdef LDAP_CONNECTIONLESS
 500         c->c_is_udp = 0;
 501         if( tls_udp_option == 2 ) {
 502                 c->c_is_udp = 1;
 503 #ifdef LDAP_DEBUG
 504                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 505                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 506 #endif
 507                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 508                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 509                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 510                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 511         } else
 512 #endif
 513         {
 514 #ifdef LDAP_DEBUG
 515                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 516                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 517 #endif
 518                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 519                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 520         }
 521
 522 #ifdef LDAP_DEBUG
 523         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 524                 INT_MAX, (void*)"ldap_" );
 525 #endif
 526
 527         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 528                 c /* non-NULL */ ) < 0 )
 529         {
 530 #ifdef NEW_LOGGING
 531                 LDAP_LOG( CONNECTION, INFO,
 532                            "connection_init: conn %lu  set nonblocking failed\n",
 533                            c->c_connid, 0, 0 );
 534 #else
 535                 Debug( LDAP_DEBUG_ANY,
 536                         "connection_init(%d, %s): set nonblocking failed\n",
 537                         s, c->c_peer_name.bv_val, 0 );
 538 #endif
 539         }
 540
 541     id = c->c_connid = conn_nextid++;
 542
 543     c->c_conn_state = SLAP_C_INACTIVE;
 544     c->c_struct_state = SLAP_C_USED;
 545
 546         c->c_ssf = c->c_transport_ssf = ssf;
 547         c->c_tls_ssf = 0;
 548
 549 #ifdef HAVE_TLS
 550     if ( tls_udp_option == 1 ) {
 551             c->c_is_tls = 1;
 552             c->c_needs_tls_accept = 1;
 553     } else {
 554             c->c_is_tls = 0;
 555             c->c_needs_tls_accept = 0;
 556     }
 557 #endif
 558
 559         slap_sasl_open( c );
 560         slap_sasl_external( c, ssf, authid );
 561
 562     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 563     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 564
 565     backend_connection_init(c);
 566
 567     return id;
 568 }
 569
 570 void connection2anonymous( Connection *c )
 571 {
 572         assert( connections != NULL );
 573         assert( c != NULL );
 574
 575         {
 576                 ber_len_t max = sockbuf_max_incoming;
 577                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 578         }
 579
 580         if(c->c_authmech.bv_val != NULL ) {
 581                 free(c->c_authmech.bv_val);
 582                 c->c_authmech.bv_val = NULL;
 583         }
 584         c->c_authmech.bv_len = 0;
 585
 586         if(c->c_dn.bv_val != NULL) {
 587                 free(c->c_dn.bv_val);
 588                 c->c_dn.bv_val = NULL;
 589         }
 590         c->c_dn.bv_len = 0;
 591         if(c->c_ndn.bv_val != NULL) {
 592                 free(c->c_ndn.bv_val);
 593                 c->c_ndn.bv_val = NULL;
 594         }
 595         c->c_ndn.bv_len = 0;
 596
 597         c->c_authz_backend = NULL;
 598
 599         {
 600                 GroupAssertion *g, *n;
 601                 for (g = c->c_groups; g; g=n) {
 602                         n = g->ga_next;
 603                         free(g);
 604                 }
 605                 c->c_groups = NULL;
 606         }
 607 }
 608
 609 static void
 610 connection_destroy( Connection *c )
 611 {
 612         /* note: connections_mutex should be locked by caller */
 613     ber_socket_t        sd;
 614     unsigned long       connid;
 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( LDAP_STAILQ_EMPTY(&c->c_ops) );
 621
 622     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 623     connid = c->c_connid;
 624
 625     backend_connection_destroy(c);
 626
 627     c->c_protocol = 0;
 628     c->c_connid = -1;
 629
 630     c->c_activitytime = c->c_starttime = 0;
 631
 632         connection2anonymous( c );
 633         c->c_listener = NULL;
 634
 635         if(c->c_peer_domain.bv_val != NULL) {
 636                 free(c->c_peer_domain.bv_val);
 637                 c->c_peer_domain.bv_val = NULL;
 638         }
 639         c->c_peer_domain.bv_len = 0;
 640         if(c->c_peer_name.bv_val != NULL) {
 641                 free(c->c_peer_name.bv_val);
 642                 c->c_peer_name.bv_val = NULL;
 643         }
 644         c->c_peer_name.bv_len = 0;
 645
 646         c->c_sasl_bind_in_progress = 0;
 647         if(c->c_sasl_bind_mech.bv_val != NULL) {
 648                 free(c->c_sasl_bind_mech.bv_val);
 649                 c->c_sasl_bind_mech.bv_val = NULL;
 650         }
 651         c->c_sasl_bind_mech.bv_len = 0;
 652
 653         slap_sasl_close( c );
 654
 655         if ( c->c_currentber != NULL ) {
 656                 ber_free( c->c_currentber, 1 );
 657                 c->c_currentber = NULL;
 658         }
 659
 660         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 661         if ( sd != AC_SOCKET_INVALID ) {
 662                 slapd_remove( sd, 0 );
 663
 664                 Statslog( LDAP_DEBUG_STATS,
 665                     "conn=%lu fd=%d closed\n",
 666                         connid, sd, 0, 0, 0 );
 667         }
 668
 669         ber_sockbuf_free( c->c_sb );
 670
 671         c->c_sb = ber_sockbuf_alloc( );
 672
 673         {
 674                 ber_len_t max = sockbuf_max_incoming;
 675                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 676         }
 677
 678     c->c_conn_state = SLAP_C_INVALID;
 679     c->c_struct_state = SLAP_C_UNUSED;
 680 }
 681
 682 int connection_state_closing( Connection *c )
 683 {
 684         /* c_mutex must be locked by caller */
 685
 686         int state;
 687         assert( c != NULL );
 688         assert( c->c_struct_state == SLAP_C_USED );
 689
 690         state = c->c_conn_state;
 691
 692         assert( state != SLAP_C_INVALID );
 693
 694         return state == SLAP_C_CLOSING;
 695 }
 696
 697 static void connection_abandon( Connection *c )
 698 {
 699         /* c_mutex must be locked by caller */
 700
 701         Operation *o;
 702
 703         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 704                 o->o_abandon = 1;
 705         }
 706
 707         /* remove pending operations */
 708         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 709                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 710                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 711                 slap_op_free( o );
 712         }
 713 }
 714
 715 void connection_closing( Connection *c )
 716 {
 717         assert( connections != NULL );
 718         assert( c != NULL );
 719         assert( c->c_struct_state == SLAP_C_USED );
 720         assert( c->c_conn_state != SLAP_C_INVALID );
 721
 722         /* c_mutex must be locked by caller */
 723
 724         if( c->c_conn_state != SLAP_C_CLOSING ) {
 725                 ber_socket_t    sd;
 726
 727                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 728 #ifdef NEW_LOGGING
 729                 LDAP_LOG( CONNECTION, DETAIL1,
 730                            "connection_closing: conn %lu readying socket %d for close.\n",
 731                            c->c_connid, sd, 0 );
 732 #else
 733                 Debug( LDAP_DEBUG_TRACE,
 734                         "connection_closing: readying conn=%lu sd=%d for close\n",
 735                         c->c_connid, sd, 0 );
 736 #endif
 737                 /* update state to closing */
 738                 c->c_conn_state = SLAP_C_CLOSING;
 739
 740                 /* don't listen on this port anymore */
 741                 slapd_clr_read( sd, 1 );
 742
 743                 /* abandon active operations */
 744                 connection_abandon( c );
 745
 746                 /* wake write blocked operations */
 747                 slapd_clr_write( sd, 1 );
 748                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 749         }
 750 }
 751
 752 static void connection_close( Connection *c )
 753 {
 754         ber_socket_t    sd;
 755
 756         assert( connections != NULL );
 757         assert( c != NULL );
 758         assert( c->c_struct_state == SLAP_C_USED );
 759         assert( c->c_conn_state == SLAP_C_CLOSING );
 760
 761         /* note: connections_mutex and c_mutex should be locked by caller */
 762
 763         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 764         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 765 #ifdef NEW_LOGGING
 766                 LDAP_LOG( CONNECTION, DETAIL1,
 767                            "connection_close: conn %lu  deferring sd %d\n",
 768                            c->c_connid, sd, 0 );
 769 #else
 770                 Debug( LDAP_DEBUG_TRACE,
 771                         "connection_close: deferring conn=%lu sd=%d\n",
 772                         c->c_connid, sd, 0 );
 773 #endif
 774                 return;
 775         }
 776
 777 #ifdef NEW_LOGGING
 778         LDAP_LOG( CONNECTION, RESULTS,
 779                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 780 #else
 781         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 782                 c->c_connid, sd, 0 );
 783 #endif
 784         connection_destroy( c );
 785 }
 786
 787 unsigned long connections_nextid(void)
 788 {
 789         unsigned long id;
 790         assert( connections != NULL );
 791
 792         ldap_pvt_thread_mutex_lock( &connections_mutex );
 793
 794         id = conn_nextid;
 795
 796         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 797
 798         return id;
 799 }
 800
 801 Connection* connection_first( ber_socket_t *index )
 802 {
 803         assert( connections != NULL );
 804         assert( index != NULL );
 805
 806         ldap_pvt_thread_mutex_lock( &connections_mutex );
 807
 808         *index = 0;
 809
 810         return connection_next(NULL, index);
 811 }
 812
 813 Connection* connection_next( Connection *c, ber_socket_t *index )
 814 {
 815         assert( connections != NULL );
 816         assert( index != NULL );
 817         assert( *index <= dtblsize );
 818
 819         if( c != NULL ) {
 820                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 821         }
 822
 823         c = NULL;
 824
 825         for(; *index < dtblsize; (*index)++) {
 826                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 827                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 828 #ifndef HAVE_WINSOCK
 829                         continue;
 830 #else
 831                         break;
 832 #endif
 833                 }
 834
 835                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 836                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 837                         c = &connections[(*index)++];
 838                         break;
 839                 }
 840
 841                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 842                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 843         }
 844
 845         if( c != NULL ) {
 846                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 847         }
 848
 849         return c;
 850 }
 851
 852 void connection_done( Connection *c )
 853 {
 854         assert( connections != NULL );
 855
 856         if( c != NULL ) {
 857                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 858         }
 859
 860         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 861 }
 862
 863 /*
 864  * connection_activity - handle the request operation op on connection
 865  * conn.  This routine figures out what kind of operation it is and
 866  * calls the appropriate stub to handle it.
 867  */
 868
 869 #ifdef SLAPD_MONITOR
 870 #define INCR_OP(var,index) \
 871         do { \
 872                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 873                 (var)[(index)]++; \
 874                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 875         } while (0)
 876 #else /* !SLAPD_MONITOR */
 877 #define INCR_OP(var,index)
 878 #endif /* !SLAPD_MONITOR */
 879
 880 static void *
 881 connection_operation( void *ctx, void *arg_v )
 882 {
 883         int rc = SLAPD_DISCONNECT;
 884         Operation *op = arg_v;
 885         SlapReply rs = {REP_RESULT};
 886         ber_tag_t tag = op->o_tag;
 887 #ifdef SLAPD_MONITOR
 888         ber_tag_t oldtag = tag;
 889 #endif /* SLAPD_MONITOR */
 890         Connection *conn = op->o_conn;
 891         void *memctx;
 892         ber_len_t memsiz;
 893
 894         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 895         num_ops_initiated++;
 896         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 897
 898         op->o_threadctx = ctx;
 899
 900         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 901 #ifdef NEW_LOGGING
 902                 LDAP_LOG( CONNECTION, ERR,
 903                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 904                         conn->c_connid, (long)tag, 0 );
 905 #else
 906                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 907                         "error: SASL bind in progress (tag=%ld).\n",
 908                         (long) tag, 0, 0 );
 909 #endif
 910                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 911                         "SASL bind in progress" );
 912                 goto operations_error;
 913         }
 914
 915         /* For all operations besides Add, we can use thread-local
 916          * storage for most mallocs.
 917          */
 918 #define SLAB_SIZE       1048576
 919         memsiz = ber_len( op->o_ber ) * 32;
 920         if ( SLAB_SIZE > memsiz ) memsiz = SLAB_SIZE;
 921
 922         if ( tag == LDAP_REQ_SEARCH ) {
 923                 memctx = sl_mem_create( memsiz, ctx );
 924                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, memctx );
 925                 op->o_tmpmemctx = memctx;
 926                 op->o_tmpmfuncs = &sl_mfuncs;
 927         } else {
 928                 op->o_tmpmemctx = NULL;
 929                 op->o_tmpmfuncs = &ch_mfuncs;
 930         }
 931
 932         switch ( tag ) {
 933         case LDAP_REQ_BIND:
 934                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 935                 rc = do_bind( op, &rs );
 936                 break;
 937
 938         case LDAP_REQ_UNBIND:
 939                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 940                 rc = do_unbind( op, &rs );
 941                 break;
 942
 943         case LDAP_REQ_ADD:
 944                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 945                 rc = do_add( op, &rs );
 946                 break;
 947
 948         case LDAP_REQ_DELETE:
 949                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 950                 rc = do_delete( op, &rs );
 951                 break;
 952
 953         case LDAP_REQ_MODRDN:
 954                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 955                 rc = do_modrdn( op, &rs );
 956                 break;
 957
 958         case LDAP_REQ_MODIFY:
 959                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 960                 rc = do_modify( op, &rs );
 961                 break;
 962
 963         case LDAP_REQ_COMPARE:
 964                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 965                 rc = do_compare( op, &rs );
 966                 break;
 967
 968         case LDAP_REQ_SEARCH:
 969                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 970                 rc = do_search( op, &rs );
 971                 break;
 972
 973         case LDAP_REQ_ABANDON:
 974                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 975                 rc = do_abandon( op, &rs );
 976                 break;
 977
 978         case LDAP_REQ_EXTENDED:
 979                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 980                 rc = do_extended( op, &rs );
 981                 break;
 982
 983         default:
 984 #ifdef NEW_LOGGING
 985                 LDAP_LOG( CONNECTION, INFO,
 986                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 987                            conn->c_connid, tag, 0  );
 988 #else
 989                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 990                     tag, 0, 0 );
 991 #endif
 992                 op->o_tag = LBER_ERROR;
 993                 rs.sr_err = LDAP_PROTOCOL_ERROR;
 994                 rs.sr_text = "unknown LDAP request";
 995                 send_ldap_disconnect( op, &rs );
 996                 rc = -1;
 997                 break;
 998         }
 999
1000 #ifdef SLAPD_MONITOR
1001         oldtag = tag;
1002 #endif /* SLAPD_MONITOR */
1003         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1004
1005 operations_error:
1006         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1007         num_ops_completed++;
1008 #ifdef SLAPD_MONITOR
1009         switch (oldtag) {
1010         case LDAP_REQ_BIND:
1011                 num_ops_completed_[SLAP_OP_BIND]++;
1012                 break;
1013         case LDAP_REQ_UNBIND:
1014                 num_ops_completed_[SLAP_OP_UNBIND]++;
1015                 break;
1016         case LDAP_REQ_ADD:
1017                 num_ops_completed_[SLAP_OP_ADD]++;
1018                 break;
1019         case LDAP_REQ_DELETE:
1020                 num_ops_completed_[SLAP_OP_DELETE]++;
1021                 break;
1022         case LDAP_REQ_MODRDN:
1023                 num_ops_completed_[SLAP_OP_MODRDN]++;
1024                 break;
1025         case LDAP_REQ_MODIFY:
1026                 num_ops_completed_[SLAP_OP_MODIFY]++;
1027                 break;
1028         case LDAP_REQ_COMPARE:
1029                 num_ops_completed_[SLAP_OP_COMPARE]++;
1030                 break;
1031         case LDAP_REQ_SEARCH:
1032                 num_ops_completed_[SLAP_OP_SEARCH]++;
1033                 break;
1034         case LDAP_REQ_ABANDON:
1035                 num_ops_completed_[SLAP_OP_ABANDON]++;
1036                 break;
1037         case LDAP_REQ_EXTENDED:
1038                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1039                 break;
1040         }
1041 #endif /* SLAPD_MONITOR */
1042         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1043
1044 #ifdef LDAP_EXOP_X_CANCEL
1045         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1046                 op->o_cancel = LDAP_TOO_LATE;
1047         }
1048
1049         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1050                 op->o_cancel != SLAP_CANCEL_DONE )
1051         {
1052                 ldap_pvt_thread_yield();
1053         }
1054 #endif
1055
1056         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1057
1058         conn->c_n_ops_executing--;
1059         conn->c_n_ops_completed++;
1060
1061         LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1062         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1063
1064 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
1065         if ( op->o_cancel == SLAP_CANCEL_ACK )
1066                 goto co_op_free;
1067 #endif
1068 #ifdef LDAP_CLIENT_UPDATE
1069         if ( ( op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
1070                 goto no_co_op_free;
1071 #endif
1072 #ifdef LDAP_SYNC
1073         if ( ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
1074                 goto no_co_op_free;
1075 #endif
1076
1077 co_op_free:
1078
1079         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, NULL );
1080         slap_op_free( op );
1081
1082 no_co_op_free:
1083
1084         switch( tag ) {
1085         case LBER_ERROR:
1086         case LDAP_REQ_UNBIND:
1087                 /* c_mutex is locked */
1088                 connection_closing( conn );
1089                 break;
1090
1091         case LDAP_REQ_BIND:
1092                 conn->c_sasl_bind_in_progress =
1093                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1094
1095                 if( conn->c_conn_state == SLAP_C_BINDING) {
1096                         conn->c_conn_state = SLAP_C_ACTIVE;
1097                 }
1098         }
1099
1100         connection_resched( conn );
1101
1102         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1103
1104         return NULL;
1105 }
1106
1107 int connection_read(ber_socket_t s)
1108 {
1109         int rc = 0;
1110         Connection *c;
1111
1112         assert( connections != NULL );
1113
1114         ldap_pvt_thread_mutex_lock( &connections_mutex );
1115
1116         /* get (locked) connection */
1117         c = connection_get( s );
1118
1119         if( c == NULL ) {
1120 #ifdef NEW_LOGGING
1121                 LDAP_LOG( CONNECTION, INFO,
1122                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1123 #else
1124                 Debug( LDAP_DEBUG_ANY,
1125                         "connection_read(%ld): no connection!\n",
1126                         (long) s, 0, 0 );
1127 #endif
1128                 slapd_remove(s, 0);
1129
1130                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1131                 return -1;
1132         }
1133
1134         c->c_n_read++;
1135
1136         if( c->c_conn_state == SLAP_C_CLOSING ) {
1137 #ifdef NEW_LOGGING
1138                 LDAP_LOG( CONNECTION, INFO,
1139                         "connection_read: conn %lu connection closing, ignoring input\n",
1140                         c->c_connid, 0, 0 );
1141 #else
1142                 Debug( LDAP_DEBUG_TRACE,
1143                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1144                         s, c->c_connid, 0 );
1145 #endif
1146                 connection_return( c );
1147                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1148                 return 0;
1149         }
1150
1151 #ifdef NEW_LOGGING
1152         LDAP_LOG( CONNECTION, DETAIL1,
1153                    "connection_read: conn %lu  checking for input.\n",
1154                    c->c_connid, 0, 0  );
1155 #else
1156         Debug( LDAP_DEBUG_TRACE,
1157                 "connection_read(%d): checking for input on id=%lu\n",
1158                 s, c->c_connid, 0 );
1159 #endif
1160
1161 #ifdef HAVE_TLS
1162         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1163                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1164                 if ( rc < 0 ) {
1165 #if 0 /* required by next #if 0 */
1166                         struct timeval tv;
1167                         fd_set rfd;
1168 #endif
1169
1170 #ifdef NEW_LOGGING
1171                         LDAP_LOG( CONNECTION, ERR,
1172                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1173                                    c->c_connid, rc, 0 );
1174 #else
1175                         Debug( LDAP_DEBUG_TRACE,
1176                                 "connection_read(%d): TLS accept error "
1177                                 "error=%d id=%lu, closing\n",
1178                                 s, rc, c->c_connid );
1179 #endif
1180                         c->c_needs_tls_accept = 0;
1181                         /* connections_mutex and c_mutex are locked */
1182                         connection_closing( c );
1183
1184 #if 0
1185                         /* Drain input before close, to allow SSL error codes
1186                          * to propagate to client. */
1187                         FD_ZERO(&rfd);
1188                         FD_SET(s, &rfd);
1189                         for (rc=1; rc>0;) {
1190                             tv.tv_sec = 1;
1191                             tv.tv_usec = 0;
1192                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1193                             if (rc == 1) {
1194                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1195                                 }
1196                         }
1197 #endif
1198                         connection_close( c );
1199
1200                 } else if ( rc == 0 ) {
1201                         void *ssl;
1202                         struct berval authid = { 0, NULL };
1203
1204                         c->c_needs_tls_accept = 0;
1205
1206                         /* we need to let SASL know */
1207                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1208
1209                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1210                         if( c->c_tls_ssf > c->c_ssf ) {
1211                                 c->c_ssf = c->c_tls_ssf;
1212                         }
1213
1214                         rc = dnX509peerNormalize( ssl, &authid );
1215                         if ( rc != LDAP_SUCCESS ) {
1216 #ifdef NEW_LOGGING
1217                                 LDAP_LOG( CONNECTION, INFO,
1218                                         "connection_read: conn %lu unable to get TLS client DN, "
1219                                         "error %d\n", c->c_connid, rc, 0 );
1220 #else
1221                                 Debug( LDAP_DEBUG_TRACE,
1222                                 "connection_read(%d): unable to get TLS client DN "
1223                                 "error=%d id=%lu\n",
1224                                 s, rc, c->c_connid );
1225 #endif
1226                         }
1227                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1228                         if ( authid.bv_val )    free( authid.bv_val );
1229                 }
1230
1231                 /* if success and data is ready, fall thru to data input loop */
1232                 if( rc != 0 ||
1233                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1234                 {
1235                         connection_return( c );
1236                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1237                         return 0;
1238                 }
1239         }
1240 #endif
1241
1242 #ifdef HAVE_CYRUS_SASL
1243         if ( c->c_sasl_layers ) {
1244                 c->c_sasl_layers = 0;
1245
1246                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1247
1248                 if( rc != LDAP_SUCCESS ) {
1249 #ifdef NEW_LOGGING
1250                         LDAP_LOG( CONNECTION, ERR,
1251                                 "connection_read: conn %lu SASL install error %d, closing\n",
1252                                 c->c_connid, rc, 0 );
1253 #else
1254                         Debug( LDAP_DEBUG_TRACE,
1255                                 "connection_read(%d): SASL install error "
1256                                 "error=%d id=%lu, closing\n",
1257                                 s, rc, c->c_connid );
1258 #endif
1259                         /* connections_mutex and c_mutex are locked */
1260                         connection_closing( c );
1261                         connection_close( c );
1262                         connection_return( c );
1263                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1264                         return 0;
1265                 }
1266         }
1267 #endif
1268
1269 #define CONNECTION_INPUT_LOOP 1
1270 /* #define      DATA_READY_LOOP 1 */
1271
1272         do
1273         {
1274                 /* How do we do this without getting into a busy loop ? */
1275                 rc = connection_input( c );
1276         }
1277 #ifdef DATA_READY_LOOP
1278         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1279 #elif CONNECTION_INPUT_LOOP
1280         while(!rc);
1281 #else
1282         while(0);
1283 #endif
1284
1285         if( rc < 0 ) {
1286 #ifdef NEW_LOGGING
1287                 LDAP_LOG( CONNECTION, ERR,
1288                         "connection_read: conn %lu  input error %d, closing.\n",
1289                         c->c_connid, rc, 0 );
1290 #else
1291                 Debug( LDAP_DEBUG_TRACE,
1292                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1293                         s, rc, c->c_connid );
1294 #endif
1295                 /* connections_mutex and c_mutex are locked */
1296                 connection_closing( c );
1297                 connection_close( c );
1298                 connection_return( c );
1299                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1300                 return 0;
1301         }
1302
1303         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1304                 slapd_set_read( s, 1 );
1305         }
1306
1307         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1308                 slapd_set_write( s, 1 );
1309         }
1310
1311         connection_return( c );
1312         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1313         return 0;
1314 }
1315
1316 static int
1317 connection_input(
1318     Connection *conn
1319 )
1320 {
1321         Operation *op;
1322         ber_tag_t       tag;
1323         ber_len_t       len;
1324         ber_int_t       msgid;
1325         BerElement      *ber;
1326         int             rc;
1327 #ifdef LDAP_CONNECTIONLESS
1328         Sockaddr        peeraddr;
1329         char            *cdn = NULL;
1330 #endif
1331
1332         if ( conn->c_currentber == NULL &&
1333                 ( conn->c_currentber = ber_alloc()) == NULL )
1334         {
1335 #ifdef NEW_LOGGING
1336                 LDAP_LOG( CONNECTION, ERR,
1337                         "connection_input: conn %lu  ber_alloc failed.\n",
1338                         conn->c_connid, 0, 0 );
1339 #else
1340                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1341 #endif
1342                 return -1;
1343         }
1344
1345         errno = 0;
1346
1347 #ifdef LDAP_CONNECTIONLESS
1348         if ( conn->c_is_udp ) {
1349                 char    peername[sizeof("IP=255.255.255.255:65336")];
1350                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1351                         sizeof(struct sockaddr));
1352                 if (len != sizeof(struct sockaddr))
1353                         return 1;
1354                 sprintf( peername, "IP=%s:%d",
1355                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1356                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1357                 Statslog( LDAP_DEBUG_STATS,
1358                         "conn=%lu UDP request from %s (%s) accepted.\n",
1359                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1360         }
1361 #endif
1362         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1363         if ( tag != LDAP_TAG_MESSAGE ) {
1364                 int err = errno;
1365                 ber_socket_t    sd;
1366
1367                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1368
1369 #ifdef NEW_LOGGING
1370                 LDAP_LOG( CONNECTION, ERR,
1371                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1372                         conn->c_connid, err, sock_errstr(err) );
1373 #else
1374                 Debug( LDAP_DEBUG_TRACE,
1375                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1376                         sd, err, sock_errstr(err) );
1377 #endif
1378                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1379                         /* log, close and send error */
1380                         ber_free( conn->c_currentber, 1 );
1381                         conn->c_currentber = NULL;
1382
1383                         return -2;
1384                 }
1385                 return 1;
1386         }
1387
1388         ber = conn->c_currentber;
1389         conn->c_currentber = NULL;
1390
1391         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1392                 /* log, close and send error */
1393 #ifdef NEW_LOGGING
1394                 LDAP_LOG( CONNECTION, ERR,
1395                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1396                         conn->c_connid, tag, 0 );
1397 #else
1398                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1399                     0 );
1400 #endif
1401                 ber_free( ber, 1 );
1402                 return -1;
1403         }
1404
1405         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1406                 /* log, close and send error */
1407 #ifdef NEW_LOGGING
1408                 LDAP_LOG( CONNECTION, ERR,
1409                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1410                            conn->c_connid, tag, 0 );
1411 #else
1412                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1413                     0 );
1414 #endif
1415                 ber_free( ber, 1 );
1416
1417                 return -1;
1418         }
1419
1420 #ifdef LDAP_CONNECTIONLESS
1421         if( conn->c_is_udp ) {
1422                 if( tag == LBER_OCTETSTRING ) {
1423                         ber_get_stringa( ber, &cdn );
1424                         tag = ber_peek_tag(ber, &len);
1425                 }
1426                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1427 #ifdef NEW_LOGGING
1428                     LDAP_LOG( CONNECTION, ERR,
1429                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1430                                conn->c_connid, tag, 0 );
1431 #else
1432                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1433                         0 );
1434 #endif
1435                     ber_free( ber, 1 );
1436                     return 0;
1437                 }
1438         }
1439 #endif
1440         if(tag == LDAP_REQ_BIND) {
1441                 /* immediately abandon all exiting operations upon BIND */
1442                 connection_abandon( conn );
1443         }
1444
1445         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1446
1447         op->o_conn = conn;
1448         op->vrFilter = NULL;
1449 #ifdef LDAP_CONTROL_PAGEDRESULTS
1450         op->o_pagedresults_state = conn->c_pagedresults_state;
1451 #endif
1452 #ifdef LDAP_CONNECTIONLESS
1453         if (conn->c_is_udp) {
1454
1455                 if ( cdn ) {
1456                     ber_str2bv( cdn, 0, 1, &op->o_dn );
1457                     op->o_protocol = LDAP_VERSION2;
1458                 }
1459                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1460                 if (op->o_res_ber == NULL)
1461                         return 1;
1462
1463                 rc = ber_write(op->o_res_ber, (char *)&peeraddr, sizeof(struct sockaddr), 0);
1464                 if (rc != sizeof(struct sockaddr)) {
1465 #ifdef NEW_LOGGING
1466                         LDAP_LOG( CONNECTION, INFO,
1467                                 "connection_input: conn %lu  ber_write failed\n",
1468                                 conn->c_connid, 0, 0 );
1469 #else
1470                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1471 #endif
1472                         return 1;
1473                 }
1474
1475                 if (op->o_protocol == LDAP_VERSION2) {
1476                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1477                         if (rc == -1) {
1478 #ifdef NEW_LOGGING
1479                                 LDAP_LOG( CONNECTION, INFO,
1480                                         "connection_input: conn %lu  put outer sequence failed\n",
1481                                         conn->c_connid, 0, 0 );
1482 #else
1483                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1484 #endif
1485                                 return rc;
1486                         }
1487                 }
1488         }
1489 #endif /* LDAP_CONNECTIONLESS */
1490
1491         rc = 0;
1492
1493         /* Don't process requests when the conn is in the middle of a
1494          * Bind, or if it's closing. Also, don't let any single conn
1495          * use up all the available threads, and don't execute if we're
1496          * currently blocked on output. And don't execute if there are
1497          * already pending ops, let them go first.
1498          */
1499         if ( conn->c_conn_state == SLAP_C_BINDING
1500                 || conn->c_conn_state == SLAP_C_CLOSING
1501                 || conn->c_n_ops_executing >= connection_pool_max/2
1502                 || conn->c_n_ops_pending
1503                 || conn->c_writewaiter)
1504         {
1505                 int max = conn->c_dn.bv_len ? slap_conn_max_pending_auth
1506                          : slap_conn_max_pending;
1507 #ifdef NEW_LOGGING
1508                 LDAP_LOG( CONNECTION, INFO,
1509                         "connection_input: conn %lu  deferring operation\n",
1510                         conn->c_connid, 0, 0 );
1511 #else
1512                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1513 #endif
1514                 conn->c_n_ops_pending++;
1515                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1516                 if ( conn->c_n_ops_pending > max ) {
1517                         rc = -1;
1518                 } else {
1519                         rc = 1;
1520                 }
1521         } else {
1522                 conn->c_n_ops_executing++;
1523                 connection_op_activate( op );
1524         }
1525
1526 #ifdef NO_THREADS
1527         if ( conn->c_struct_state != SLAP_C_USED ) {
1528                 /* connection must have got closed underneath us */
1529                 return 1;
1530         }
1531 #endif
1532         assert( conn->c_struct_state == SLAP_C_USED );
1533
1534         return rc;
1535 }
1536
1537 static int
1538 connection_resched( Connection *conn )
1539 {
1540         Operation *op;
1541
1542         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1543                 int rc;
1544                 ber_socket_t    sd;
1545                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1546
1547                 /* us trylock to avoid possible deadlock */
1548                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1549
1550                 if( rc ) {
1551 #ifdef NEW_LOGGING
1552                         LDAP_LOG( CONNECTION, DETAIL1,
1553                                 "connection_resched: conn %lu  reaquiring locks.\n",
1554                                 conn->c_connid, 0, 0 );
1555 #else
1556                         Debug( LDAP_DEBUG_TRACE,
1557                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1558                                 conn->c_connid, sd, 0 );
1559 #endif
1560                         /*
1561                          * reaquire locks in the right order...
1562                          * this may allow another thread to close this connection,
1563                          * so recheck state below.
1564                          */
1565                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1566                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1567                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1568                 }
1569
1570                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1571 #ifdef NEW_LOGGING
1572                         LDAP_LOG( CONNECTION, INFO,
1573                                 "connection_resched: conn %lu  closed by other thread.\n",
1574                                 conn->c_connid, 0, 0 );
1575 #else
1576                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1577                                 "closed by other thread conn=%lu sd=%d\n",
1578                                 conn->c_connid, sd, 0 );
1579 #endif
1580                 } else {
1581 #ifdef NEW_LOGGING
1582                         LDAP_LOG( CONNECTION, DETAIL1,
1583                                 "connection_resched: conn %lu  attempting closing.\n",
1584                                 conn->c_connid, 0, 0 );
1585 #else
1586                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1587                                 "attempting closing conn=%lu sd=%d\n",
1588                                 conn->c_connid, sd, 0 );
1589 #endif
1590                         connection_close( conn );
1591                 }
1592
1593                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1594                 return 0;
1595         }
1596
1597         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1598                 /* other states need different handling */
1599                 return 0;
1600         }
1601
1602         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1603                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1604                         break;
1605                 }
1606                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1607                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1608                 /* pending operations should not be marked for abandonment */
1609                 assert(!op->o_abandon);
1610
1611                 conn->c_n_ops_pending--;
1612                 conn->c_n_ops_executing++;
1613
1614                 connection_op_activate( op );
1615
1616                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1617                         break;
1618                 }
1619         }
1620         return 0;
1621 }
1622
1623 static int connection_op_activate( Operation *op )
1624 {
1625         int status;
1626         ber_tag_t tag = op->o_tag;
1627
1628         if(tag == LDAP_REQ_BIND) {
1629                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1630         }
1631
1632         if (!op->o_dn.bv_len) {
1633             op->o_authz = op->o_conn->c_authz;
1634             ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1635             ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1636         }
1637         op->o_authtype = op->o_conn->c_authtype;
1638         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1639
1640         if (!op->o_protocol) {
1641             op->o_protocol = op->o_conn->c_protocol
1642                 ? op->o_conn->c_protocol : LDAP_VERSION3;
1643         }
1644         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1645                 && op->o_protocol > LDAP_VERSION2) {
1646                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1647         }
1648
1649         op->o_connid = op->o_conn->c_connid;
1650
1651         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1652
1653         status = ldap_pvt_thread_pool_submit( &connection_pool,
1654                 connection_operation, (void *) op );
1655
1656         if ( status != 0 ) {
1657 #ifdef NEW_LOGGING
1658                 LDAP_LOG( CONNECTION, ERR,
1659                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1660                         op->o_connid, 0, 0 );
1661 #else
1662                 Debug( LDAP_DEBUG_ANY,
1663                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1664 #endif
1665                 /* should move op to pending list */
1666         }
1667
1668         return status;
1669 }
1670
1671 int connection_write(ber_socket_t s)
1672 {
1673         Connection *c;
1674
1675         assert( connections != NULL );
1676
1677         ldap_pvt_thread_mutex_lock( &connections_mutex );
1678
1679         c = connection_get( s );
1680
1681         slapd_clr_write( s, 0);
1682
1683         if( c == NULL ) {
1684 #ifdef NEW_LOGGING
1685                 LDAP_LOG( CONNECTION, ERR,
1686                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1687 #else
1688                 Debug( LDAP_DEBUG_ANY,
1689                         "connection_write(%ld): no connection!\n",
1690                         (long) s, 0, 0 );
1691 #endif
1692                 slapd_remove(s, 0);
1693                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1694                 return -1;
1695         }
1696
1697         c->c_n_write++;
1698
1699 #ifdef NEW_LOGGING
1700         LDAP_LOG( CONNECTION, DETAIL1,
1701                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1702 #else
1703         Debug( LDAP_DEBUG_TRACE,
1704                 "connection_write(%d): waking output for id=%lu\n",
1705                 s, c->c_connid, 0 );
1706 #endif
1707         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1708
1709         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1710                 slapd_set_read( s, 1 );
1711         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1712                 slapd_set_write( s, 1 );
1713         connection_return( c );
1714         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1715         return 0;
1716 }
1717