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

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1998-2003 The OpenLDAP Foundation.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted only as authorized by the OpenLDAP
   9  * Public License.
  10  *
  11  * A copy of this license is available in the file LICENSE in the
  12  * top-level directory of the distribution or, alternatively, at
  13  * <http://www.OpenLDAP.org/license.html>.
  14  */
  15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  16  * All rights reserved.
  17  *
  18  * Redistribution and use in source and binary forms are permitted
  19  * provided that this notice is preserved and that due credit is given
  20  * to the University of Michigan at Ann Arbor. The name of the University
  21  * may not be used to endorse or promote products derived from this
  22  * software without specific prior written permission. This software
  23  * is provided ``as is'' without express or implied warranty.
  24  */
  25
  26 #include "portable.h"
  27
  28 #include <stdio.h>
  29 #include <limits.h>
  30
  31 #include <ac/socket.h>
  32 #include <ac/errno.h>
  33 #include <ac/string.h>
  34 #include <ac/time.h>
  35 #include <ac/unistd.h>
  36
  37 #include "ldap_pvt.h"
  38 #include "lutil.h"
  39 #include "slap.h"
  40
  41 #ifdef LDAP_SLAPI
  42 #include "slapi.h"
  43 #endif
  44
  45 /* protected by connections_mutex */
  46 static ldap_pvt_thread_mutex_t connections_mutex;
  47 static Connection *connections = NULL;
  48 static unsigned long conn_nextid = 0;
  49
  50 /* structure state (protected by connections_mutex) */
  51 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  52 #define SLAP_C_UNUSED                   0x01
  53 #define SLAP_C_USED                             0x02
  54
  55 /* connection state (protected by c_mutex ) */
  56 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  57 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  58 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  59 #define SLAP_C_BINDING                  0x03    /* binding */
  60 #define SLAP_C_CLOSING                  0x04    /* closing */
  61 #define SLAP_C_CLIENT                   0x05    /* outbound client conn */
  62
  63 const char *
  64 connection_state2str( int state )
  65 {
  66         switch( state ) {
  67         case SLAP_C_INVALID:    return "!";
  68         case SLAP_C_INACTIVE:   return "|";
  69         case SLAP_C_ACTIVE:             return "";
  70         case SLAP_C_BINDING:    return "B";
  71         case SLAP_C_CLOSING:    return "C";
  72         case SLAP_C_CLIENT:             return "L";
  73         }
  74
  75         return "?";
  76 }
  77
  78 static Connection* connection_get( ber_socket_t s );
  79
  80 static int connection_input( Connection *c );
  81 static void connection_close( Connection *c );
  82
  83 static int connection_op_activate( Operation *op );
  84 static int connection_resched( Connection *conn );
  85 static void connection_abandon( Connection *conn );
  86 static void connection_destroy( Connection *c );
  87
  88 static ldap_pvt_thread_start_t connection_operation;
  89
  90 /*
  91  * Initialize connection management infrastructure.
  92  */
  93 int connections_init(void)
  94 {
  95         assert( connections == NULL );
  96
  97         if( connections != NULL) {
  98 #ifdef NEW_LOGGING
  99                 LDAP_LOG( CONNECTION, INFO,
 100                         "connections_init: already initialized.\n", 0, 0, 0 );
 101 #else
 102                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
 103                         0, 0, 0 );
 104 #endif
 105                 return -1;
 106         }
 107
 108         /* should check return of every call */
 109         ldap_pvt_thread_mutex_init( &connections_mutex );
 110
 111         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
 112
 113         if( connections == NULL ) {
 114 #ifdef NEW_LOGGING
 115                 LDAP_LOG( CONNECTION, ERR,
 116                         "connections_init: allocation (%d * %ld) of connection "
 117                         "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
 118 #else
 119                 Debug( LDAP_DEBUG_ANY,
 120                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 121                         dtblsize, (long) sizeof(Connection), 0 );
 122 #endif
 123                 return -1;
 124         }
 125
 126         assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 127         assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 128
 129         /*
 130          * per entry initialization of the Connection array initialization
 131          * will be done by connection_init()
 132          */
 133
 134         return 0;
 135 }
 136
 137 /*
 138  * Destroy connection management infrastructure.
 139  */
 140 int connections_destroy(void)
 141 {
 142         ber_socket_t i;
 143
 144         /* should check return of every call */
 145
 146         if( connections == NULL) {
 147 #ifdef NEW_LOGGING
 148                 LDAP_LOG( CONNECTION, INFO,
 149                         "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 150 #else
 151                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 152                         0, 0, 0 );
 153 #endif
 154                 return -1;
 155         }
 156
 157         for ( i = 0; i < dtblsize; i++ ) {
 158                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 159                         ber_sockbuf_free( connections[i].c_sb );
 160                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 161                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 162                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 163 #ifdef LDAP_SLAPI
 164                         if ( slapi_plugins_used ) {
 165                                 slapi_x_free_object_extensions( SLAPI_X_EXT_CONNECTION, &connections[i] );
 166                         }
 167 #endif
 168                 }
 169         }
 170
 171         free( connections );
 172         connections = NULL;
 173
 174         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 175         return 0;
 176 }
 177
 178 /*
 179  * shutdown all connections
 180  */
 181 int connections_shutdown(void)
 182 {
 183         ber_socket_t i;
 184
 185         ldap_pvt_thread_mutex_lock( &connections_mutex );
 186
 187         for ( i = 0; i < dtblsize; i++ ) {
 188                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 189                         continue;
 190                 }
 191                 /* give persistent clients a chance to cleanup */
 192                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 193                         ldap_pvt_thread_pool_submit( &connection_pool,
 194                         connections[i].c_clientfunc, connections[i].c_clientarg );
 195                         continue;
 196                 }
 197
 198                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 199
 200                 /* connections_mutex and c_mutex are locked */
 201                 connection_closing( &connections[i] );
 202                 connection_close( &connections[i] );
 203
 204                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 205         }
 206
 207         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 208
 209         return 0;
 210 }
 211
 212 /*
 213  * Timeout idle connections.
 214  */
 215 int connections_timeout_idle(time_t now)
 216 {
 217         int i = 0;
 218         int connindex;
 219         Connection* c;
 220
 221         for( c = connection_first( &connindex );
 222                 c != NULL;
 223                 c = connection_next( c, &connindex ) )
 224         {
 225                 /* Don't timeout a slow-running request or a persistent
 226                  * outbound connection */
 227                 if( c->c_n_ops_executing ||
 228                         c->c_conn_state == SLAP_C_CLIENT ) continue;
 229
 230                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 231                         /* close it */
 232                         connection_closing( c );
 233                         connection_close( c );
 234                         i++;
 235                 }
 236         }
 237         connection_done( c );
 238
 239         return i;
 240 }
 241
 242 static Connection* connection_get( ber_socket_t s )
 243 {
 244         /* connections_mutex should be locked by caller */
 245
 246         Connection *c;
 247
 248 #ifdef NEW_LOGGING
 249         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 250 #else
 251         Debug( LDAP_DEBUG_ARGS,
 252                 "connection_get(%ld)\n",
 253                 (long) s, 0, 0 );
 254 #endif
 255
 256         assert( connections != NULL );
 257
 258         if(s == AC_SOCKET_INVALID) {
 259                 return NULL;
 260         }
 261
 262 #ifndef HAVE_WINSOCK
 263         c = &connections[s];
 264
 265         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 266
 267 #else
 268         c = NULL;
 269         {
 270                 ber_socket_t i, sd;
 271
 272                 for(i=0; i<dtblsize; i++) {
 273                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 274                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 275                                 assert( connections[i].c_sb == 0 );
 276                                 break;
 277                         }
 278
 279                         ber_sockbuf_ctrl( connections[i].c_sb,
 280                                 LBER_SB_OPT_GET_FD, &sd );
 281
 282                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 283                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 284                                 assert( sd == AC_SOCKET_INVALID );
 285                                 continue;
 286                         }
 287
 288                         /* state can actually change from used -> unused by resched,
 289                          * so don't assert details here.
 290                          */
 291
 292                         if( sd == s ) {
 293                                 c = &connections[i];
 294                                 break;
 295                         }
 296                 }
 297         }
 298 #endif
 299
 300         if( c != NULL ) {
 301                 ber_socket_t    sd;
 302
 303                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 304
 305                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 306                 if( c->c_struct_state != SLAP_C_USED ) {
 307                         /* connection must have been closed due to resched */
 308
 309                         assert( c->c_conn_state == SLAP_C_INVALID );
 310                         assert( sd == AC_SOCKET_INVALID );
 311
 312 #ifdef NEW_LOGGING
 313                         LDAP_LOG( CONNECTION, ARGS,
 314                                 "connection_get: connection %d not used\n", s, 0, 0 );
 315 #else
 316                         Debug( LDAP_DEBUG_TRACE,
 317                                 "connection_get(%d): connection not used\n",
 318                                 s, 0, 0 );
 319 #endif
 320
 321                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 322                         return NULL;
 323                 }
 324                 if( c->c_conn_state == SLAP_C_CLIENT ) sd = 0;
 325
 326 #ifdef NEW_LOGGING
 327                 LDAP_LOG( CONNECTION, RESULTS,
 328                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 329 #else
 330                 Debug( LDAP_DEBUG_TRACE,
 331                         "connection_get(%d): got connid=%lu\n",
 332                         s, c->c_connid, 0 );
 333 #endif
 334
 335                 c->c_n_get++;
 336
 337                 assert( c->c_struct_state == SLAP_C_USED );
 338                 assert( c->c_conn_state != SLAP_C_INVALID );
 339                 assert( sd != AC_SOCKET_INVALID );
 340
 341 #ifdef SLAPD_MONITOR
 342                 c->c_activitytime = slap_get_time();
 343 #else
 344                 if( global_idletimeout > 0 ) {
 345                         c->c_activitytime = slap_get_time();
 346                 }
 347 #endif
 348         }
 349
 350         return c;
 351 }
 352
 353 static void connection_return( Connection *c )
 354 {
 355         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 356 }
 357
 358 long connection_init(
 359         ber_socket_t s,
 360         Listener *listener,
 361         const char* dnsname,
 362         const char* peername,
 363         int flags,
 364         slap_ssf_t ssf,
 365         const char *authid )
 366 {
 367         unsigned long id;
 368         Connection *c;
 369
 370         assert( connections != NULL );
 371
 372         assert( listener != NULL );
 373         assert( dnsname != NULL );
 374         assert( peername != NULL );
 375
 376 #ifndef HAVE_TLS
 377         assert( flags != CONN_IS_TLS );
 378 #endif
 379
 380         if( s == AC_SOCKET_INVALID ) {
 381 #ifdef NEW_LOGGING
 382                 LDAP_LOG( CONNECTION, INFO,
 383                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 384 #else
 385                 Debug( LDAP_DEBUG_ANY,
 386                         "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 387 #endif
 388                 return -1;
 389         }
 390
 391         assert( s >= 0 );
 392 #ifndef HAVE_WINSOCK
 393         assert( s < dtblsize );
 394 #endif
 395
 396         ldap_pvt_thread_mutex_lock( &connections_mutex );
 397
 398 #ifndef HAVE_WINSOCK
 399         c = &connections[s];
 400
 401 #else
 402         {
 403                 ber_socket_t i;
 404                 c = NULL;
 405
 406                 for( i=0; i < dtblsize; i++) {
 407                         ber_socket_t    sd;
 408
 409                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 410                                 assert( connections[i].c_sb == 0 );
 411                                 c = &connections[i];
 412                                 break;
 413                         }
 414
 415                         sd = AC_SOCKET_INVALID;
 416                         if (connections[i].c_sb != NULL) {
 417                                 ber_sockbuf_ctrl( connections[i].c_sb,
 418                                         LBER_SB_OPT_GET_FD, &sd );
 419                         }
 420
 421                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 422                                 assert( sd == AC_SOCKET_INVALID );
 423                                 c = &connections[i];
 424                                 break;
 425                         }
 426
 427                         assert( connections[i].c_struct_state == SLAP_C_USED );
 428                         assert( connections[i].c_conn_state != SLAP_C_INVALID );
 429                         assert( sd != AC_SOCKET_INVALID );
 430                 }
 431
 432                 if( c == NULL ) {
 433 #ifdef NEW_LOGGING
 434                         LDAP_LOG( CONNECTION, INFO,
 435                                 "connection_init(%d): connection table full "
 436                                 "(%d/%d)\n", s, i, dtblsize );
 437 #else
 438                         Debug( LDAP_DEBUG_ANY,
 439                                 "connection_init(%d): connection table full "
 440                                 "(%d/%d)\n", s, i, dtblsize);
 441 #endif
 442                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 443                         return -1;
 444                 }
 445         }
 446 #endif
 447
 448         assert( c != NULL );
 449
 450         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 451                 c->c_send_ldap_result = slap_send_ldap_result;
 452                 c->c_send_search_entry = slap_send_search_entry;
 453                 c->c_send_search_reference = slap_send_search_reference;
 454                 c->c_send_ldap_extended = slap_send_ldap_extended;
 455 #ifdef LDAP_RES_INTERMEDIATE
 456                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 457 #endif
 458
 459                 c->c_authmech.bv_val = NULL;
 460                 c->c_authmech.bv_len = 0;
 461                 c->c_dn.bv_val = NULL;
 462                 c->c_dn.bv_len = 0;
 463                 c->c_ndn.bv_val = NULL;
 464                 c->c_ndn.bv_len = 0;
 465
 466                 c->c_listener = NULL;
 467                 c->c_peer_domain.bv_val = NULL;
 468                 c->c_peer_domain.bv_len = 0;
 469                 c->c_peer_name.bv_val = NULL;
 470                 c->c_peer_name.bv_len = 0;
 471
 472                 LDAP_STAILQ_INIT(&c->c_ops);
 473                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 474
 475                 c->c_sasl_bind_mech.bv_val = NULL;
 476                 c->c_sasl_bind_mech.bv_len = 0;
 477                 c->c_sasl_done = 0;
 478                 c->c_sasl_authctx = NULL;
 479                 c->c_sasl_sockctx = NULL;
 480                 c->c_sasl_extra = NULL;
 481                 c->c_sasl_bindop = NULL;
 482
 483                 c->c_sb = ber_sockbuf_alloc( );
 484
 485                 {
 486                         ber_len_t max = sockbuf_max_incoming;
 487                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 488                 }
 489
 490                 c->c_currentber = NULL;
 491
 492                 /* should check status of thread calls */
 493                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 494                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 495                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 496
 497 #ifdef LDAP_SLAPI
 498                 if ( slapi_plugins_used ) {
 499                         slapi_x_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 500                 }
 501 #endif
 502
 503                 c->c_struct_state = SLAP_C_UNUSED;
 504         }
 505
 506         ldap_pvt_thread_mutex_lock( &c->c_mutex );
 507
 508         assert( c->c_struct_state == SLAP_C_UNUSED );
 509         assert( c->c_authmech.bv_val == NULL );
 510         assert( c->c_dn.bv_val == NULL );
 511         assert( c->c_ndn.bv_val == NULL );
 512         assert( c->c_listener == NULL );
 513         assert( c->c_peer_domain.bv_val == NULL );
 514         assert( c->c_peer_name.bv_val == NULL );
 515         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 516         assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 517         assert( c->c_sasl_bind_mech.bv_val == NULL );
 518         assert( c->c_sasl_done == 0 );
 519         assert( c->c_sasl_authctx == NULL );
 520         assert( c->c_sasl_sockctx == NULL );
 521         assert( c->c_sasl_extra == NULL );
 522         assert( c->c_sasl_bindop == NULL );
 523         assert( c->c_currentber == NULL );
 524         assert( c->c_writewaiter == 0);
 525
 526         c->c_listener = listener;
 527
 528         if ( flags == CONN_IS_CLIENT ) {
 529                 c->c_conn_state = SLAP_C_CLIENT;
 530                 c->c_struct_state = SLAP_C_USED;
 531                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 532                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 533
 534                 return 0;
 535         }
 536
 537         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 538         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 539
 540         c->c_n_ops_received = 0;
 541         c->c_n_ops_executing = 0;
 542         c->c_n_ops_pending = 0;
 543         c->c_n_ops_completed = 0;
 544
 545         c->c_n_get = 0;
 546         c->c_n_read = 0;
 547         c->c_n_write = 0;
 548
 549         /* set to zero until bind, implies LDAP_VERSION3 */
 550         c->c_protocol = 0;
 551
 552 #ifdef SLAPD_MONITOR
 553         c->c_activitytime = c->c_starttime = slap_get_time();
 554 #else
 555         if( global_idletimeout > 0 ) {
 556                 c->c_activitytime = c->c_starttime = slap_get_time();
 557         }
 558 #endif
 559
 560 #ifdef LDAP_CONNECTIONLESS
 561         c->c_is_udp = 0;
 562         if( flags == CONN_IS_UDP ) {
 563                 c->c_is_udp = 1;
 564 #ifdef LDAP_DEBUG
 565                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 566                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 567 #endif
 568                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 569                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 570                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 571                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 572         } else
 573 #endif
 574         {
 575 #ifdef LDAP_DEBUG
 576                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 577                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 578 #endif
 579                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 580                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 581         }
 582
 583 #ifdef LDAP_DEBUG
 584         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 585                 INT_MAX, (void*)"ldap_" );
 586 #endif
 587
 588         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 589                 c /* non-NULL */ ) < 0 )
 590         {
 591 #ifdef NEW_LOGGING
 592                 LDAP_LOG( CONNECTION, INFO,
 593                         "connection_init: conn %lu set nonblocking failed\n",
 594                         c->c_connid, 0, 0 );
 595 #else
 596                 Debug( LDAP_DEBUG_ANY,
 597                         "connection_init(%d, %s): set nonblocking failed\n",
 598                         s, c->c_peer_name.bv_val, 0 );
 599 #endif
 600         }
 601
 602         id = c->c_connid = conn_nextid++;
 603
 604         c->c_conn_state = SLAP_C_INACTIVE;
 605         c->c_struct_state = SLAP_C_USED;
 606
 607         c->c_ssf = c->c_transport_ssf = ssf;
 608         c->c_tls_ssf = 0;
 609
 610 #ifdef HAVE_TLS
 611         if ( flags == CONN_IS_TLS ) {
 612                 c->c_is_tls = 1;
 613                 c->c_needs_tls_accept = 1;
 614         } else {
 615                 c->c_is_tls = 0;
 616                 c->c_needs_tls_accept = 0;
 617         }
 618 #endif
 619
 620         slap_sasl_open( c, 0 );
 621         slap_sasl_external( c, ssf, authid );
 622
 623         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 624         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 625
 626         backend_connection_init(c);
 627
 628         return id;
 629 }
 630
 631 void connection2anonymous( Connection *c )
 632 {
 633         assert( connections != NULL );
 634         assert( c != NULL );
 635
 636         {
 637                 ber_len_t max = sockbuf_max_incoming;
 638                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 639         }
 640
 641         if(c->c_authmech.bv_val != NULL ) {
 642                 free(c->c_authmech.bv_val);
 643                 c->c_authmech.bv_val = NULL;
 644         }
 645         c->c_authmech.bv_len = 0;
 646
 647         if(c->c_dn.bv_val != NULL) {
 648                 free(c->c_dn.bv_val);
 649                 c->c_dn.bv_val = NULL;
 650         }
 651         c->c_dn.bv_len = 0;
 652         if(c->c_ndn.bv_val != NULL) {
 653                 free(c->c_ndn.bv_val);
 654                 c->c_ndn.bv_val = NULL;
 655         }
 656         c->c_ndn.bv_len = 0;
 657
 658         c->c_authz_backend = NULL;
 659 }
 660
 661 static void
 662 connection_destroy( Connection *c )
 663 {
 664         /* note: connections_mutex should be locked by caller */
 665         ber_socket_t    sd;
 666         unsigned long   connid;
 667
 668         assert( connections != NULL );
 669         assert( c != NULL );
 670         assert( c->c_struct_state != SLAP_C_UNUSED );
 671         assert( c->c_conn_state != SLAP_C_INVALID );
 672         assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 673         assert( c->c_writewaiter == 0);
 674
 675         /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 676         connid = c->c_connid;
 677
 678         backend_connection_destroy(c);
 679
 680         c->c_protocol = 0;
 681         c->c_connid = -1;
 682
 683         c->c_activitytime = c->c_starttime = 0;
 684
 685         connection2anonymous( c );
 686         c->c_listener = NULL;
 687
 688         if(c->c_peer_domain.bv_val != NULL) {
 689                 free(c->c_peer_domain.bv_val);
 690                 c->c_peer_domain.bv_val = NULL;
 691         }
 692         c->c_peer_domain.bv_len = 0;
 693         if(c->c_peer_name.bv_val != NULL) {
 694                 free(c->c_peer_name.bv_val);
 695                 c->c_peer_name.bv_val = NULL;
 696         }
 697         c->c_peer_name.bv_len = 0;
 698
 699         c->c_sasl_bind_in_progress = 0;
 700         if(c->c_sasl_bind_mech.bv_val != NULL) {
 701                 free(c->c_sasl_bind_mech.bv_val);
 702                 c->c_sasl_bind_mech.bv_val = NULL;
 703         }
 704         c->c_sasl_bind_mech.bv_len = 0;
 705
 706         slap_sasl_close( c );
 707
 708         if ( c->c_currentber != NULL ) {
 709                 ber_free( c->c_currentber, 1 );
 710                 c->c_currentber = NULL;
 711         }
 712
 713         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 714         if ( sd != AC_SOCKET_INVALID ) {
 715                 slapd_remove( sd, 1, 0 );
 716
 717                 Statslog( LDAP_DEBUG_STATS,
 718                         "conn=%lu fd=%ld closed\n",
 719                         connid, (long) sd, 0, 0, 0 );
 720         }
 721
 722         ber_sockbuf_free( c->c_sb );
 723
 724         c->c_sb = ber_sockbuf_alloc( );
 725
 726         {
 727                 ber_len_t max = sockbuf_max_incoming;
 728                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 729         }
 730
 731         c->c_conn_state = SLAP_C_INVALID;
 732         c->c_struct_state = SLAP_C_UNUSED;
 733
 734 #ifdef LDAP_SLAPI
 735         /* call destructors, then constructors; avoids unnecessary allocation */
 736         if ( slapi_plugins_used ) {
 737                 slapi_x_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 738         }
 739 #endif
 740 }
 741
 742 int connection_state_closing( Connection *c )
 743 {
 744         /* c_mutex must be locked by caller */
 745
 746         int state;
 747         assert( c != NULL );
 748         assert( c->c_struct_state == SLAP_C_USED );
 749
 750         state = c->c_conn_state;
 751
 752         assert( state != SLAP_C_INVALID );
 753
 754         return state == SLAP_C_CLOSING;
 755 }
 756
 757 static void connection_abandon( Connection *c )
 758 {
 759         /* c_mutex must be locked by caller */
 760
 761         Operation *o;
 762
 763         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 764                 o->o_abandon = 1;
 765         }
 766
 767         /* remove pending operations */
 768         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 769                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 770                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 771                 slap_op_free( o );
 772         }
 773 }
 774
 775 void connection_closing( Connection *c )
 776 {
 777         assert( connections != NULL );
 778         assert( c != NULL );
 779         assert( c->c_struct_state == SLAP_C_USED );
 780         assert( c->c_conn_state != SLAP_C_INVALID );
 781
 782         /* c_mutex must be locked by caller */
 783
 784         if( c->c_conn_state != SLAP_C_CLOSING ) {
 785                 ber_socket_t    sd;
 786
 787                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 788 #ifdef NEW_LOGGING
 789                 LDAP_LOG( CONNECTION, DETAIL1,
 790                         "connection_closing: conn %lu readying socket %d for close.\n",
 791                         c->c_connid, sd, 0 );
 792 #else
 793                 Debug( LDAP_DEBUG_TRACE,
 794                         "connection_closing: readying conn=%lu sd=%d for close\n",
 795                         c->c_connid, sd, 0 );
 796 #endif
 797                 /* update state to closing */
 798                 c->c_conn_state = SLAP_C_CLOSING;
 799
 800                 /* don't listen on this port anymore */
 801                 slapd_clr_read( sd, 1 );
 802
 803                 /* abandon active operations */
 804                 connection_abandon( c );
 805
 806                 /* wake write blocked operations */
 807                 slapd_clr_write( sd, 1 );
 808                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 809         }
 810 }
 811
 812 static void connection_close( Connection *c )
 813 {
 814         ber_socket_t    sd;
 815
 816         assert( connections != NULL );
 817         assert( c != NULL );
 818         assert( c->c_struct_state == SLAP_C_USED );
 819         assert( c->c_conn_state == SLAP_C_CLOSING );
 820
 821         /* note: connections_mutex and c_mutex should be locked by caller */
 822
 823         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 824         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 825 #ifdef NEW_LOGGING
 826                 LDAP_LOG( CONNECTION, DETAIL1,
 827                         "connection_close: conn %lu deferring sd %d\n",
 828                                 c->c_connid, sd, 0 );
 829 #else
 830                 Debug( LDAP_DEBUG_TRACE,
 831                         "connection_close: deferring conn=%lu sd=%d\n",
 832                         c->c_connid, sd, 0 );
 833 #endif
 834                 return;
 835         }
 836
 837 #ifdef NEW_LOGGING
 838         LDAP_LOG( CONNECTION, RESULTS,
 839                 "connection_close: conn %lu sd %d\n", c->c_connid, sd, 0 );
 840 #else
 841         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 842                 c->c_connid, sd, 0 );
 843 #endif
 844         connection_destroy( c );
 845 }
 846
 847 unsigned long connections_nextid(void)
 848 {
 849         unsigned long id;
 850         assert( connections != NULL );
 851
 852         ldap_pvt_thread_mutex_lock( &connections_mutex );
 853
 854         id = conn_nextid;
 855
 856         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 857
 858         return id;
 859 }
 860
 861 Connection* connection_first( ber_socket_t *index )
 862 {
 863         assert( connections != NULL );
 864         assert( index != NULL );
 865
 866         ldap_pvt_thread_mutex_lock( &connections_mutex );
 867
 868         *index = 0;
 869
 870         return connection_next(NULL, index);
 871 }
 872
 873 Connection* connection_next( Connection *c, ber_socket_t *index )
 874 {
 875         assert( connections != NULL );
 876         assert( index != NULL );
 877         assert( *index <= dtblsize );
 878
 879         if( c != NULL ) {
 880                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 881         }
 882
 883         c = NULL;
 884
 885         for(; *index < dtblsize; (*index)++) {
 886                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 887                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 888 #ifndef HAVE_WINSOCK
 889                         continue;
 890 #else
 891                         break;
 892 #endif
 893                 }
 894
 895                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 896                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 897                         c = &connections[(*index)++];
 898                         break;
 899                 }
 900
 901                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 902                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 903         }
 904
 905         if( c != NULL ) {
 906                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 907         }
 908
 909         return c;
 910 }
 911
 912 void connection_done( Connection *c )
 913 {
 914         assert( connections != NULL );
 915
 916         if( c != NULL ) {
 917                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 918         }
 919
 920         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 921 }
 922
 923 /*
 924  * connection_activity - handle the request operation op on connection
 925  * conn.  This routine figures out what kind of operation it is and
 926  * calls the appropriate stub to handle it.
 927  */
 928
 929 #ifdef SLAPD_MONITOR
 930 #define INCR_OP(var,index) \
 931         do { \
 932                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 933                 (var)[(index)]++; \
 934                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 935         } while (0)
 936 #else /* !SLAPD_MONITOR */
 937 #define INCR_OP(var,index)
 938 #endif /* !SLAPD_MONITOR */
 939
 940 static void *
 941 connection_operation( void *ctx, void *arg_v )
 942 {
 943         int rc = SLAPD_DISCONNECT;
 944         Operation *op = arg_v;
 945         SlapReply rs = {REP_RESULT};
 946         ber_tag_t tag = op->o_tag;
 947 #ifdef SLAPD_MONITOR
 948         ber_tag_t oldtag = tag;
 949 #endif /* SLAPD_MONITOR */
 950         Connection *conn = op->o_conn;
 951         void *memctx = NULL;
 952         void *memctx_null = NULL;
 953         ber_len_t memsiz;
 954
 955         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 956         num_ops_initiated++;
 957         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 958
 959         op->o_threadctx = ctx;
 960
 961         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 962 #ifdef NEW_LOGGING
 963                 LDAP_LOG( CONNECTION, ERR,
 964                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 965                         conn->c_connid, (long)tag, 0 );
 966 #else
 967                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 968                         "error: SASL bind in progress (tag=%ld).\n",
 969                         (long) tag, 0, 0 );
 970 #endif
 971                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 972                         "SASL bind in progress" );
 973                 goto operations_error;
 974         }
 975
 976         /* We can use Thread-Local storage for most mallocs. We can
 977          * also use TL for ber parsing, but not on Add or Modify.
 978          */
 979 #if 0
 980         memsiz = ber_len( op->o_ber ) * 64;
 981         if ( SLMALLOC_SLAB_SIZE > memsiz ) memsiz = SLMALLOC_SLAB_SIZE;
 982 #endif
 983         memsiz = SLMALLOC_SLAB_SIZE;
 984
 985         memctx = sl_mem_create( memsiz, ctx );
 986         op->o_tmpmemctx = memctx;
 987         op->o_tmpmfuncs = &sl_mfuncs;
 988         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
 989                 /* Note - the ber and its buffer are already allocated from
 990                  * regular memory; this only affects subsequent mallocs that
 991                  * ber_scanf may invoke.
 992                  */
 993                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
 994         }
 995
 996         switch ( tag ) {
 997         case LDAP_REQ_BIND:
 998                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 999                 rc = do_bind( op, &rs );
1000                 break;
1001
1002         case LDAP_REQ_UNBIND:
1003                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
1004                 rc = do_unbind( op, &rs );
1005                 break;
1006
1007         case LDAP_REQ_ADD:
1008                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
1009                 rc = do_add( op, &rs );
1010                 break;
1011
1012         case LDAP_REQ_DELETE:
1013                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
1014                 rc = do_delete( op, &rs );
1015                 break;
1016
1017         case LDAP_REQ_MODRDN:
1018                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
1019                 rc = do_modrdn( op, &rs );
1020                 break;
1021
1022         case LDAP_REQ_MODIFY:
1023                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
1024                 rc = do_modify( op, &rs );
1025                 break;
1026
1027         case LDAP_REQ_COMPARE:
1028                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
1029                 rc = do_compare( op, &rs );
1030                 break;
1031
1032         case LDAP_REQ_SEARCH:
1033                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
1034                 rc = do_search( op, &rs );
1035                 break;
1036
1037         case LDAP_REQ_ABANDON:
1038                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
1039                 rc = do_abandon( op, &rs );
1040                 break;
1041
1042         case LDAP_REQ_EXTENDED:
1043                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
1044                 rc = do_extended( op, &rs );
1045                 break;
1046
1047         default:
1048 #ifdef NEW_LOGGING
1049                 LDAP_LOG( CONNECTION, INFO,
1050                         "connection_operation: conn %lu unknown LDAP request 0x%lx\n",
1051                         conn->c_connid, tag, 0 );
1052 #else
1053                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1054                         tag, 0, 0 );
1055 #endif
1056                 op->o_tag = LBER_ERROR;
1057                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1058                 rs.sr_text = "unknown LDAP request";
1059                 send_ldap_disconnect( op, &rs );
1060                 rc = -1;
1061                 break;
1062         }
1063
1064 #ifdef SLAPD_MONITOR
1065         oldtag = tag;
1066 #endif /* SLAPD_MONITOR */
1067         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1068
1069 operations_error:
1070         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1071         num_ops_completed++;
1072 #ifdef SLAPD_MONITOR
1073         switch (oldtag) {
1074         case LDAP_REQ_BIND:
1075                 num_ops_completed_[SLAP_OP_BIND]++;
1076                 break;
1077         case LDAP_REQ_UNBIND:
1078                 num_ops_completed_[SLAP_OP_UNBIND]++;
1079                 break;
1080         case LDAP_REQ_ADD:
1081                 num_ops_completed_[SLAP_OP_ADD]++;
1082                 break;
1083         case LDAP_REQ_DELETE:
1084                 num_ops_completed_[SLAP_OP_DELETE]++;
1085                 break;
1086         case LDAP_REQ_MODRDN:
1087                 num_ops_completed_[SLAP_OP_MODRDN]++;
1088                 break;
1089         case LDAP_REQ_MODIFY:
1090                 num_ops_completed_[SLAP_OP_MODIFY]++;
1091                 break;
1092         case LDAP_REQ_COMPARE:
1093                 num_ops_completed_[SLAP_OP_COMPARE]++;
1094                 break;
1095         case LDAP_REQ_SEARCH:
1096                 num_ops_completed_[SLAP_OP_SEARCH]++;
1097                 break;
1098         case LDAP_REQ_ABANDON:
1099                 num_ops_completed_[SLAP_OP_ABANDON]++;
1100                 break;
1101         case LDAP_REQ_EXTENDED:
1102                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1103                 break;
1104         }
1105 #endif /* SLAPD_MONITOR */
1106         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1107
1108 #ifdef LDAP_EXOP_X_CANCEL
1109         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1110                 op->o_cancel = LDAP_TOO_LATE;
1111         }
1112
1113         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1114                 op->o_cancel != SLAP_CANCEL_DONE )
1115         {
1116                 ldap_pvt_thread_yield();
1117         }
1118 #endif
1119
1120         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1121
1122         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1123
1124         if ( op->o_cancel != SLAP_CANCEL_ACK &&
1125                                 ( op->o_sync_mode & SLAP_SYNC_PERSIST ) ) {
1126                 sl_mem_detach( ctx, memctx );
1127         } else if (( op->o_sync_slog_size != -1 )) {
1128                 sl_mem_detach( ctx, memctx );
1129                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1130                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1131                 conn->c_n_ops_executing--;
1132                 conn->c_n_ops_completed++;
1133         } else {
1134                 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1135                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1136                 slap_op_free( op );
1137                 conn->c_n_ops_executing--;
1138                 conn->c_n_ops_completed++;
1139         }
1140
1141         switch( tag ) {
1142         case LBER_ERROR:
1143         case LDAP_REQ_UNBIND:
1144                 /* c_mutex is locked */
1145                 connection_closing( conn );
1146                 break;
1147
1148         case LDAP_REQ_BIND:
1149                 conn->c_sasl_bind_in_progress =
1150                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1151
1152                 if( conn->c_conn_state == SLAP_C_BINDING) {
1153                         conn->c_conn_state = SLAP_C_ACTIVE;
1154                 }
1155         }
1156
1157         connection_resched( conn );
1158
1159         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1160
1161         return NULL;
1162 }
1163
1164 int connection_client_setup(
1165         ber_socket_t s,
1166         Listener *l,
1167         ldap_pvt_thread_start_t *func,
1168         void *arg )
1169 {
1170         Connection *c;
1171
1172         if ( connection_init( s, l, "", "", CONN_IS_CLIENT, 0, "" ) < 0 ) {
1173                 return -1;
1174         }
1175
1176         c = connection_get( s );
1177         c->c_clientfunc = func;
1178         c->c_clientarg = arg;
1179         connection_return( c );
1180         slapd_add_internal( s, 0 );
1181         slapd_set_read( s, 1 );
1182         return 0;
1183 }
1184
1185 void connection_client_enable(
1186         ber_socket_t s
1187 )
1188 {
1189         slapd_set_read( s, 1 );
1190 }
1191
1192 void connection_client_stop(
1193         ber_socket_t s
1194 )
1195 {
1196         Connection *c;
1197
1198         /* get (locked) connection */
1199         c = connection_get( s );
1200
1201         assert( c->c_conn_state == SLAP_C_CLIENT );
1202
1203         c->c_listener = NULL;
1204         c->c_conn_state = SLAP_C_INVALID;
1205         c->c_struct_state = SLAP_C_UNUSED;
1206         connection_return( c );
1207         slapd_remove( s, 0, 1 );
1208 }
1209
1210 int connection_read(ber_socket_t s)
1211 {
1212         int rc = 0;
1213         Connection *c;
1214
1215         assert( connections != NULL );
1216
1217         ldap_pvt_thread_mutex_lock( &connections_mutex );
1218
1219         /* get (locked) connection */
1220         c = connection_get( s );
1221
1222         if( c == NULL ) {
1223 #ifdef NEW_LOGGING
1224                 LDAP_LOG( CONNECTION, INFO,
1225                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1226 #else
1227                 Debug( LDAP_DEBUG_ANY,
1228                         "connection_read(%ld): no connection!\n",
1229                         (long) s, 0, 0 );
1230 #endif
1231                 slapd_remove(s, 1, 0);
1232
1233                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1234                 return -1;
1235         }
1236
1237         c->c_n_read++;
1238
1239         if( c->c_conn_state == SLAP_C_CLOSING ) {
1240 #ifdef NEW_LOGGING
1241                 LDAP_LOG( CONNECTION, INFO,
1242                         "connection_read: conn %lu connection closing, ignoring input\n",
1243                         c->c_connid, 0, 0 );
1244 #else
1245                 Debug( LDAP_DEBUG_TRACE,
1246                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1247                         s, c->c_connid, 0 );
1248 #endif
1249                 connection_return( c );
1250                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1251                 return 0;
1252         }
1253
1254         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1255                 slapd_clr_read( s, 0 );
1256                 ldap_pvt_thread_pool_submit( &connection_pool,
1257                         c->c_clientfunc, c->c_clientarg );
1258                 connection_return( c );
1259                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1260                 return 0;
1261         }
1262
1263 #ifdef NEW_LOGGING
1264         LDAP_LOG( CONNECTION, DETAIL1,
1265                 "connection_read: conn %lu checking for input.\n",
1266                         c->c_connid, 0, 0 );
1267 #else
1268         Debug( LDAP_DEBUG_TRACE,
1269                 "connection_read(%d): checking for input on id=%lu\n",
1270                 s, c->c_connid, 0 );
1271 #endif
1272
1273 #ifdef HAVE_TLS
1274         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1275                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1276                 if ( rc < 0 ) {
1277 #if 0 /* required by next #if 0 */
1278                         struct timeval tv;
1279                         fd_set rfd;
1280 #endif
1281
1282 #ifdef NEW_LOGGING
1283                         LDAP_LOG( CONNECTION, ERR,
1284                                 "connection_read: conn %lu TLS accept error, error %d\n",
1285                                 c->c_connid, rc, 0 );
1286 #else
1287                         Debug( LDAP_DEBUG_TRACE,
1288                                 "connection_read(%d): TLS accept error "
1289                                 "error=%d id=%lu, closing\n",
1290                                 s, rc, c->c_connid );
1291 #endif
1292                         c->c_needs_tls_accept = 0;
1293                         /* connections_mutex and c_mutex are locked */
1294                         connection_closing( c );
1295
1296 #if 0
1297                         /* Drain input before close, to allow SSL error codes
1298                          * to propagate to client. */
1299                         FD_ZERO(&rfd);
1300                         FD_SET(s, &rfd);
1301                         for (rc=1; rc>0;) {
1302                                 tv.tv_sec = 1;
1303                                 tv.tv_usec = 0;
1304                                 rc = select(s+1, &rfd, NULL, NULL, &tv);
1305                                 if (rc == 1) {
1306                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1307                                 }
1308                         }
1309 #endif
1310                         connection_close( c );
1311
1312                 } else if ( rc == 0 ) {
1313                         void *ssl;
1314                         struct berval authid = { 0, NULL };
1315
1316                         c->c_needs_tls_accept = 0;
1317
1318                         /* we need to let SASL know */
1319                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1320
1321                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1322                         if( c->c_tls_ssf > c->c_ssf ) {
1323                                 c->c_ssf = c->c_tls_ssf;
1324                         }
1325
1326                         rc = dnX509peerNormalize( ssl, &authid );
1327                         if ( rc != LDAP_SUCCESS ) {
1328 #ifdef NEW_LOGGING
1329                                 LDAP_LOG( CONNECTION, INFO,
1330                                         "connection_read: conn %lu unable to get TLS client DN, "
1331                                         "error %d\n", c->c_connid, rc, 0 );
1332 #else
1333                                 Debug( LDAP_DEBUG_TRACE,
1334                                 "connection_read(%d): unable to get TLS client DN "
1335                                 "error=%d id=%lu\n",
1336                                 s, rc, c->c_connid );
1337 #endif
1338                         }
1339                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1340                         if ( authid.bv_val )    free( authid.bv_val );
1341                 }
1342
1343                 /* if success and data is ready, fall thru to data input loop */
1344                 if( rc != 0 ||
1345                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1346                 {
1347                         connection_return( c );
1348                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1349                         return 0;
1350                 }
1351         }
1352 #endif
1353
1354 #ifdef HAVE_CYRUS_SASL
1355         if ( c->c_sasl_layers ) {
1356                 /* If previous layer is not removed yet, give up for now */
1357                 if ( !c->c_sasl_sockctx ) {
1358                         connection_return( c );
1359                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1360                         return 0;
1361                 }
1362
1363                 c->c_sasl_layers = 0;
1364
1365                 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1366
1367                 if( rc != LDAP_SUCCESS ) {
1368 #ifdef NEW_LOGGING
1369                         LDAP_LOG( CONNECTION, ERR,
1370                                 "connection_read: conn %lu SASL install error %d, closing\n",
1371                                 c->c_connid, rc, 0 );
1372 #else
1373                         Debug( LDAP_DEBUG_TRACE,
1374                                 "connection_read(%d): SASL install error "
1375                                 "error=%d id=%lu, closing\n",
1376                                 s, rc, c->c_connid );
1377 #endif
1378                         /* connections_mutex and c_mutex are locked */
1379                         connection_closing( c );
1380                         connection_close( c );
1381                         connection_return( c );
1382                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1383                         return 0;
1384                 }
1385         }
1386 #endif
1387
1388 #define CONNECTION_INPUT_LOOP 1
1389 /* #define      DATA_READY_LOOP 1 */
1390
1391         do {
1392                 /* How do we do this without getting into a busy loop ? */
1393                 rc = connection_input( c );
1394         }
1395 #ifdef DATA_READY_LOOP
1396         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1397 #elif CONNECTION_INPUT_LOOP
1398         while(!rc);
1399 #else
1400         while(0);
1401 #endif
1402
1403         if( rc < 0 ) {
1404 #ifdef NEW_LOGGING
1405                 LDAP_LOG( CONNECTION, ERR,
1406                         "connection_read: conn %lu input error %d, closing.\n",
1407                         c->c_connid, rc, 0 );
1408 #else
1409                 Debug( LDAP_DEBUG_TRACE,
1410                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1411                         s, rc, c->c_connid );
1412 #endif
1413                 /* connections_mutex and c_mutex are locked */
1414                 connection_closing( c );
1415                 connection_close( c );
1416                 connection_return( c );
1417                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1418                 return 0;
1419         }
1420
1421         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1422                 slapd_set_read( s, 1 );
1423         }
1424
1425         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1426                 slapd_set_write( s, 1 );
1427         }
1428
1429         connection_return( c );
1430         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1431         return 0;
1432 }
1433
1434 static int
1435 connection_input(
1436         Connection *conn
1437 )
1438 {
1439         Operation *op;
1440         ber_tag_t       tag;
1441         ber_len_t       len;
1442         ber_int_t       msgid;
1443         BerElement      *ber;
1444         int             rc;
1445 #ifdef LDAP_CONNECTIONLESS
1446         Sockaddr        peeraddr;
1447         char            *cdn = NULL;
1448 #endif
1449
1450         if ( conn->c_currentber == NULL &&
1451                 ( conn->c_currentber = ber_alloc()) == NULL )
1452         {
1453 #ifdef NEW_LOGGING
1454                 LDAP_LOG( CONNECTION, ERR,
1455                         "connection_input: conn %lu ber_alloc failed.\n",
1456                         conn->c_connid, 0, 0 );
1457 #else
1458                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1459 #endif
1460                 return -1;
1461         }
1462
1463         errno = 0;
1464
1465 #ifdef LDAP_CONNECTIONLESS
1466         if ( conn->c_is_udp ) {
1467                 char    peername[sizeof("IP=255.255.255.255:65336")];
1468                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1469                         sizeof(struct sockaddr));
1470                 if (len != sizeof(struct sockaddr))
1471                         return 1;
1472                 sprintf( peername, "IP=%s:%d",
1473                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1474                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1475                 Statslog( LDAP_DEBUG_STATS,
1476                         "conn=%lu UDP request from %s (%s) accepted.\n",
1477                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1478         }
1479 #endif
1480         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1481         if ( tag != LDAP_TAG_MESSAGE ) {
1482                 int err = errno;
1483                 ber_socket_t    sd;
1484
1485                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1486
1487 #ifdef NEW_LOGGING
1488                 LDAP_LOG( CONNECTION, ERR,
1489                         "connection_input: conn %lu ber_get_next failed, errno %d (%s).\n",
1490                         conn->c_connid, err, sock_errstr(err) );
1491 #else
1492                 Debug( LDAP_DEBUG_TRACE,
1493                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1494                         sd, err, sock_errstr(err) );
1495 #endif
1496                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1497                         /* log, close and send error */
1498                         ber_free( conn->c_currentber, 1 );
1499                         conn->c_currentber = NULL;
1500
1501                         return -2;
1502                 }
1503                 return 1;
1504         }
1505
1506         ber = conn->c_currentber;
1507         conn->c_currentber = NULL;
1508
1509         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1510                 /* log, close and send error */
1511 #ifdef NEW_LOGGING
1512                 LDAP_LOG( CONNECTION, ERR,
1513                         "connection_input: conn %lu ber_get_int returns 0x%lx.\n",
1514                         conn->c_connid, tag, 0 );
1515 #else
1516                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n",
1517                         tag, 0, 0 );
1518 #endif
1519                 ber_free( ber, 1 );
1520                 return -1;
1521         }
1522
1523         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1524                 /* log, close and send error */
1525 #ifdef NEW_LOGGING
1526                 LDAP_LOG( CONNECTION, ERR,
1527                         "connection_input: conn %lu ber_peek_tag returns 0x%lx.\n",
1528                         conn->c_connid, tag, 0 );
1529 #else
1530                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n",
1531                         tag, 0, 0 );
1532 #endif
1533                 ber_free( ber, 1 );
1534
1535                 return -1;
1536         }
1537
1538 #ifdef LDAP_CONNECTIONLESS
1539         if( conn->c_is_udp ) {
1540                 if( tag == LBER_OCTETSTRING ) {
1541                         ber_get_stringa( ber, &cdn );
1542                         tag = ber_peek_tag(ber, &len);
1543                 }
1544                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1545 #ifdef NEW_LOGGING
1546                         LDAP_LOG( CONNECTION, ERR,
1547                                 "connection_input: conn %lu invalid req for UDP 0x%lx.\n",
1548                                 conn->c_connid, tag, 0 );
1549 #else
1550                         Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1551 #endif
1552                         ber_free( ber, 1 );
1553                         return 0;
1554                 }
1555         }
1556 #endif
1557         if(tag == LDAP_REQ_BIND) {
1558                 /* immediately abandon all exiting operations upon BIND */
1559                 connection_abandon( conn );
1560         }
1561
1562         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1563
1564         op->o_conn = conn;
1565         op->o_assertion = NULL;
1566         op->o_preread_attrs = NULL;
1567         op->o_postread_attrs = NULL;
1568         op->o_vrFilter = NULL;
1569         op->o_pagedresults_state = conn->c_pagedresults_state;
1570
1571         op->o_res_ber = NULL;
1572
1573 #ifdef LDAP_CONNECTIONLESS
1574         if (conn->c_is_udp) {
1575                 if ( cdn ) {
1576                         ber_str2bv( cdn, 0, 1, &op->o_dn );
1577                         op->o_protocol = LDAP_VERSION2;
1578                 }
1579                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1580                 if (op->o_res_ber == NULL) return 1;
1581
1582                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1583                         sizeof(struct sockaddr), 0 );
1584
1585                 if (rc != sizeof(struct sockaddr)) {
1586 #ifdef NEW_LOGGING
1587                         LDAP_LOG( CONNECTION, INFO,
1588                                 "connection_input: conn %lu ber_write failed\n",
1589                                 conn->c_connid, 0, 0 );
1590 #else
1591                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1592 #endif
1593                         return 1;
1594                 }
1595
1596                 if (op->o_protocol == LDAP_VERSION2) {
1597                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1598                         if (rc == -1) {
1599 #ifdef NEW_LOGGING
1600                                 LDAP_LOG( CONNECTION, INFO,
1601                                         "connection_input: conn %lu put outer sequence failed\n",
1602                                         conn->c_connid, 0, 0 );
1603 #else
1604                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1605 #endif
1606                                 return rc;
1607                         }
1608                 }
1609         }
1610 #endif /* LDAP_CONNECTIONLESS */
1611
1612         rc = 0;
1613
1614         /* Don't process requests when the conn is in the middle of a
1615          * Bind, or if it's closing. Also, don't let any single conn
1616          * use up all the available threads, and don't execute if we're
1617          * currently blocked on output. And don't execute if there are
1618          * already pending ops, let them go first.
1619          *
1620          * But always allow Abandon through; it won't cost much.
1621          */
1622         if ( tag != LDAP_REQ_ABANDON && (conn->c_conn_state == SLAP_C_BINDING
1623                 || conn->c_conn_state == SLAP_C_CLOSING
1624                 || conn->c_n_ops_executing >= connection_pool_max/2
1625                 || conn->c_n_ops_pending
1626                 || conn->c_writewaiter))
1627         {
1628                 int max = conn->c_dn.bv_len
1629                         ? slap_conn_max_pending_auth
1630                         : slap_conn_max_pending;
1631
1632 #ifdef NEW_LOGGING
1633                 LDAP_LOG( CONNECTION, INFO,
1634                         "connection_input: conn %lu deferring operation\n",
1635                         conn->c_connid, 0, 0 );
1636 #else
1637                 Debug( LDAP_DEBUG_ANY,
1638                         "connection_input: conn=%lu deferring operation\n",
1639                         conn->c_connid, 0, 0 );
1640 #endif
1641                 conn->c_n_ops_pending++;
1642                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1643                 if ( conn->c_n_ops_pending > max ) {
1644                         rc = -1;
1645                 } else {
1646                         rc = 1;
1647                 }
1648         } else {
1649                 conn->c_n_ops_executing++;
1650                 connection_op_activate( op );
1651         }
1652
1653 #ifdef NO_THREADS
1654         if ( conn->c_struct_state != SLAP_C_USED ) {
1655                 /* connection must have got closed underneath us */
1656                 return 1;
1657         }
1658 #endif
1659         assert( conn->c_struct_state == SLAP_C_USED );
1660
1661         return rc;
1662 }
1663
1664 static int
1665 connection_resched( Connection *conn )
1666 {
1667         Operation *op;
1668
1669         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1670                 int rc;
1671                 ber_socket_t    sd;
1672                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1673
1674                 /* us trylock to avoid possible deadlock */
1675                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1676
1677                 if( rc ) {
1678 #ifdef NEW_LOGGING
1679                         LDAP_LOG( CONNECTION, DETAIL1,
1680                                 "connection_resched: conn %lu reaquiring locks.\n",
1681                                 conn->c_connid, 0, 0 );
1682 #else
1683                         Debug( LDAP_DEBUG_TRACE,
1684                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1685                                 conn->c_connid, sd, 0 );
1686 #endif
1687                         /*
1688                          * reaquire locks in the right order...
1689                          * this may allow another thread to close this connection,
1690                          * so recheck state below.
1691                          */
1692                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1693                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1694                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1695                 }
1696
1697                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1698 #ifdef NEW_LOGGING
1699                         LDAP_LOG( CONNECTION, INFO,
1700                                 "connection_resched: conn %lu closed by other thread.\n",
1701                                 conn->c_connid, 0, 0 );
1702 #else
1703                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1704                                 "closed by other thread conn=%lu sd=%d\n",
1705                                 conn->c_connid, sd, 0 );
1706 #endif
1707                 } else {
1708 #ifdef NEW_LOGGING
1709                         LDAP_LOG( CONNECTION, DETAIL1,
1710                                 "connection_resched: conn %lu attempting closing.\n",
1711                                 conn->c_connid, 0, 0 );
1712 #else
1713                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1714                                 "attempting closing conn=%lu sd=%d\n",
1715                                 conn->c_connid, sd, 0 );
1716 #endif
1717                         connection_close( conn );
1718                 }
1719
1720                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1721                 return 0;
1722         }
1723
1724         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1725                 /* other states need different handling */
1726                 return 0;
1727         }
1728
1729         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1730                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1731                         break;
1732                 }
1733                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1734                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1735                 /* pending operations should not be marked for abandonment */
1736                 assert(!op->o_abandon);
1737
1738                 conn->c_n_ops_pending--;
1739                 conn->c_n_ops_executing++;
1740
1741                 connection_op_activate( op );
1742
1743                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1744                         break;
1745                 }
1746         }
1747         return 0;
1748 }
1749
1750 static int connection_op_activate( Operation *op )
1751 {
1752         int status;
1753         ber_tag_t tag = op->o_tag;
1754
1755         if(tag == LDAP_REQ_BIND) {
1756                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1757         }
1758
1759         if (!op->o_dn.bv_len) {
1760                 op->o_authz = op->o_conn->c_authz;
1761                 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1762                 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1763         }
1764         op->o_authtype = op->o_conn->c_authtype;
1765         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1766
1767         if (!op->o_protocol) {
1768                 op->o_protocol = op->o_conn->c_protocol
1769                         ? op->o_conn->c_protocol : LDAP_VERSION3;
1770         }
1771         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1772                 && op->o_protocol > LDAP_VERSION2)
1773         {
1774                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1775         }
1776
1777         op->o_connid = op->o_conn->c_connid;
1778
1779         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1780
1781         status = ldap_pvt_thread_pool_submit( &connection_pool,
1782                 connection_operation, (void *) op );
1783
1784         if ( status != 0 ) {
1785 #ifdef NEW_LOGGING
1786                 LDAP_LOG( CONNECTION, ERR,
1787                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1788                         op->o_connid, 0, 0 );
1789 #else
1790                 Debug( LDAP_DEBUG_ANY,
1791                         "ldap_pvt_thread_pool_submit: failed (%d) for conn=%lu\n",
1792                         status, op->o_connid, 0 );
1793 #endif
1794                 /* should move op to pending list */
1795         }
1796
1797         return status;
1798 }
1799
1800 int connection_write(ber_socket_t s)
1801 {
1802         Connection *c;
1803
1804         assert( connections != NULL );
1805
1806         ldap_pvt_thread_mutex_lock( &connections_mutex );
1807
1808         c = connection_get( s );
1809
1810         slapd_clr_write( s, 0);
1811
1812         if( c == NULL ) {
1813 #ifdef NEW_LOGGING
1814                 LDAP_LOG( CONNECTION, ERR,
1815                         "connection_write: sock %ld no connection!\n", (long)s, 0, 0);
1816 #else
1817                 Debug( LDAP_DEBUG_ANY,
1818                         "connection_write(%ld): no connection!\n",
1819                         (long)s, 0, 0 );
1820 #endif
1821                 slapd_remove(s, 1, 0);
1822                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1823                 return -1;
1824         }
1825
1826         c->c_n_write++;
1827
1828 #ifdef NEW_LOGGING
1829         LDAP_LOG( CONNECTION, DETAIL1,
1830                 "connection_write conn %lu waking output.\n", c->c_connid, 0, 0 );
1831 #else
1832         Debug( LDAP_DEBUG_TRACE,
1833                 "connection_write(%d): waking output for id=%lu\n",
1834                 s, c->c_connid, 0 );
1835 #endif
1836         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1837
1838         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1839                 slapd_set_read( s, 1 );
1840         }
1841         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1842                 slapd_set_write( s, 1 );
1843         }
1844         connection_return( c );
1845         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1846         return 0;
1847 }
1848