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 #ifdef LDAP_SLAPI
  23 #include "slapi.h"
  24 #endif
  25
  26 /* protected by connections_mutex */
  27 static ldap_pvt_thread_mutex_t connections_mutex;
  28 static Connection *connections = NULL;
  29 static unsigned long conn_nextid = 0;
  30
  31 /* structure state (protected by connections_mutex) */
  32 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  33 #define SLAP_C_UNUSED                   0x01
  34 #define SLAP_C_USED                             0x02
  35
  36 /* connection state (protected by c_mutex ) */
  37 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  38 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  39 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  40 #define SLAP_C_BINDING                  0x03    /* binding */
  41 #define SLAP_C_CLOSING                  0x04    /* closing */
  42 #define SLAP_C_CLIENT                   0x05    /* outbound client conn */
  43
  44 const char *
  45 connection_state2str( int state )
  46 {
  47         switch( state ) {
  48         case SLAP_C_INVALID:    return "!";
  49         case SLAP_C_INACTIVE:   return "|";
  50         case SLAP_C_ACTIVE:             return "";
  51         case SLAP_C_BINDING:    return "B";
  52         case SLAP_C_CLOSING:    return "C";
  53         case SLAP_C_CLIENT:             return "L";
  54         }
  55
  56         return "?";
  57 }
  58
  59 static Connection* connection_get( ber_socket_t s );
  60
  61 static int connection_input( Connection *c );
  62 static void connection_close( Connection *c );
  63
  64 static int connection_op_activate( Operation *op );
  65 static int connection_resched( Connection *conn );
  66 static void connection_abandon( Connection *conn );
  67 static void connection_destroy( Connection *c );
  68
  69 static ldap_pvt_thread_start_t connection_operation;
  70
  71 /*
  72  * Initialize connection management infrastructure.
  73  */
  74 int connections_init(void)
  75 {
  76         assert( connections == NULL );
  77
  78         if( connections != NULL) {
  79 #ifdef NEW_LOGGING
  80                 LDAP_LOG( CONNECTION, INFO,
  81                            "connections_init:  already initialized.\n", 0, 0, 0 );
  82 #else
  83                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  84                         0, 0, 0 );
  85 #endif
  86                 return -1;
  87         }
  88
  89         /* should check return of every call */
  90         ldap_pvt_thread_mutex_init( &connections_mutex );
  91
  92         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
  93
  94         if( connections == NULL ) {
  95 #ifdef NEW_LOGGING
  96                 LDAP_LOG( CONNECTION, ERR,
  97                            "connections_init: allocation (%d * %ld) of connection "
  98                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
  99 #else
 100                 Debug( LDAP_DEBUG_ANY,
 101                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 102                         dtblsize, (long) sizeof(Connection), 0 );
 103 #endif
 104                 return -1;
 105         }
 106
 107     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 108     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 109
 110         /*
 111          * per entry initialization of the Connection array initialization
 112          * will be done by connection_init()
 113          */
 114
 115         return 0;
 116 }
 117
 118 /*
 119  * Destroy connection management infrastructure.
 120  */
 121 int connections_destroy(void)
 122 {
 123         ber_socket_t i;
 124
 125         /* should check return of every call */
 126
 127         if( connections == NULL) {
 128 #ifdef NEW_LOGGING
 129                 LDAP_LOG( CONNECTION, INFO,
 130                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 131 #else
 132                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 133                         0, 0, 0 );
 134 #endif
 135                 return -1;
 136         }
 137
 138         for ( i = 0; i < dtblsize; i++ ) {
 139                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 140                         ber_sockbuf_free( connections[i].c_sb );
 141                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 142                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 143                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 144 #ifdef LDAP_SLAPI
 145                         if ( slapi_plugins_used ) {
 146                                 slapi_x_free_object_extensions( SLAPI_X_EXT_CONNECTION, &connections[i] );
 147                         }
 148 #endif
 149                 }
 150         }
 151
 152         free( connections );
 153         connections = NULL;
 154
 155         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 156         return 0;
 157 }
 158
 159 /*
 160  * shutdown all connections
 161  */
 162 int connections_shutdown(void)
 163 {
 164         ber_socket_t i;
 165
 166         ldap_pvt_thread_mutex_lock( &connections_mutex );
 167
 168         for ( i = 0; i < dtblsize; i++ ) {
 169                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 170                         continue;
 171                 }
 172                 /* give persistent clients a chance to cleanup */
 173                 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
 174                         ldap_pvt_thread_pool_submit( &connection_pool,
 175                         connections[i].c_clientfunc, connections[i].c_clientarg );
 176                         continue;
 177                 }
 178
 179                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 180
 181                 /* connections_mutex and c_mutex are locked */
 182                 connection_closing( &connections[i] );
 183                 connection_close( &connections[i] );
 184
 185                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 186         }
 187
 188         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 189
 190         return 0;
 191 }
 192
 193 /*
 194  * Timeout idle connections.
 195  */
 196 int connections_timeout_idle(time_t now)
 197 {
 198         int i = 0;
 199         int connindex;
 200         Connection* c;
 201
 202         for( c = connection_first( &connindex );
 203                 c != NULL;
 204                 c = connection_next( c, &connindex ) )
 205         {
 206                 /* Don't timeout a slow-running request or a persistent
 207                  * outbound connection */
 208                 if( c->c_n_ops_executing ||
 209                         c->c_conn_state == SLAP_C_CLIENT ) continue;
 210
 211                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 212                         /* close it */
 213                         connection_closing( c );
 214                         connection_close( c );
 215                         i++;
 216                 }
 217         }
 218         connection_done( c );
 219
 220         return i;
 221 }
 222
 223 static Connection* connection_get( ber_socket_t s )
 224 {
 225         /* connections_mutex should be locked by caller */
 226
 227         Connection *c;
 228
 229 #ifdef NEW_LOGGING
 230         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 231 #else
 232         Debug( LDAP_DEBUG_ARGS,
 233                 "connection_get(%ld)\n",
 234                 (long) s, 0, 0 );
 235 #endif
 236
 237         assert( connections != NULL );
 238
 239         if(s == AC_SOCKET_INVALID) {
 240                 return NULL;
 241         }
 242
 243 #ifndef HAVE_WINSOCK
 244         c = &connections[s];
 245
 246         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 247
 248 #else
 249         c = NULL;
 250         {
 251                 ber_socket_t i, sd;
 252
 253                 for(i=0; i<dtblsize; i++) {
 254                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 255                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 256                                 assert( connections[i].c_sb == 0 );
 257                                 break;
 258                         }
 259
 260                         ber_sockbuf_ctrl( connections[i].c_sb,
 261                                 LBER_SB_OPT_GET_FD, &sd );
 262
 263                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 264                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 265                                 assert( sd == AC_SOCKET_INVALID );
 266                                 continue;
 267                         }
 268
 269                         /* state can actually change from used -> unused by resched,
 270                          * so don't assert details here.
 271                          */
 272
 273                         if( sd == s ) {
 274                                 c = &connections[i];
 275                                 break;
 276                         }
 277                 }
 278         }
 279 #endif
 280
 281         if( c != NULL ) {
 282                 ber_socket_t    sd;
 283
 284                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 285
 286                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 287                 if( c->c_struct_state != SLAP_C_USED ) {
 288                         /* connection must have been closed due to resched */
 289
 290                         assert( c->c_conn_state == SLAP_C_INVALID );
 291                         assert( sd == AC_SOCKET_INVALID );
 292
 293 #ifdef NEW_LOGGING
 294                         LDAP_LOG( CONNECTION, ARGS,
 295                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 296 #else
 297                         Debug( LDAP_DEBUG_TRACE,
 298                                 "connection_get(%d): connection not used\n",
 299                                 s, 0, 0 );
 300 #endif
 301
 302                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 303                         return NULL;
 304                 }
 305                 if( c->c_conn_state == SLAP_C_CLIENT ) sd = 0;
 306
 307 #ifdef NEW_LOGGING
 308                 LDAP_LOG( CONNECTION, RESULTS,
 309                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 310 #else
 311                 Debug( LDAP_DEBUG_TRACE,
 312                         "connection_get(%d): got connid=%lu\n",
 313                         s, c->c_connid, 0 );
 314 #endif
 315
 316                 c->c_n_get++;
 317
 318                 assert( c->c_struct_state == SLAP_C_USED );
 319                 assert( c->c_conn_state != SLAP_C_INVALID );
 320                 assert( sd != AC_SOCKET_INVALID );
 321
 322 #ifdef SLAPD_MONITOR
 323                 c->c_activitytime = slap_get_time();
 324 #else
 325                 if( global_idletimeout > 0 ) {
 326                         c->c_activitytime = slap_get_time();
 327                 }
 328 #endif
 329         }
 330
 331         return c;
 332 }
 333
 334 static void connection_return( Connection *c )
 335 {
 336         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 337 }
 338
 339 long connection_init(
 340         ber_socket_t s,
 341         Listener *listener,
 342         const char* dnsname,
 343         const char* peername,
 344         int flags,
 345         slap_ssf_t ssf,
 346         const char *authid )
 347 {
 348         unsigned long id;
 349         Connection *c;
 350
 351         assert( connections != NULL );
 352
 353         assert( listener != NULL );
 354         assert( dnsname != NULL );
 355         assert( peername != NULL );
 356
 357 #ifndef HAVE_TLS
 358         assert( flags != CONN_IS_TLS );
 359 #endif
 360
 361         if( s == AC_SOCKET_INVALID ) {
 362 #ifdef NEW_LOGGING
 363                 LDAP_LOG( CONNECTION, INFO,
 364                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 365 #else
 366                 Debug( LDAP_DEBUG_ANY,
 367                        "connection_init(%ld): invalid.\n",
 368                        (long) s, 0, 0 );
 369 #endif
 370                 return -1;
 371         }
 372
 373         assert( s >= 0 );
 374 #ifndef HAVE_WINSOCK
 375         assert( s < dtblsize );
 376 #endif
 377
 378         ldap_pvt_thread_mutex_lock( &connections_mutex );
 379
 380 #ifndef HAVE_WINSOCK
 381         c = &connections[s];
 382
 383 #else
 384         {
 385                 ber_socket_t    i;
 386
 387                 c = NULL;
 388
 389         for( i=0; i < dtblsize; i++) {
 390                 ber_socket_t    sd;
 391
 392             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 393                 assert( connections[i].c_sb == 0 );
 394                 c = &connections[i];
 395                 break;
 396             }
 397
 398                         sd = AC_SOCKET_INVALID;
 399                         if (connections[i].c_sb != NULL)
 400                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 401
 402             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 403                 assert( sd == AC_SOCKET_INVALID );
 404                 c = &connections[i];
 405                 break;
 406             }
 407
 408             assert( connections[i].c_struct_state == SLAP_C_USED );
 409             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 410             assert( sd != AC_SOCKET_INVALID );
 411         }
 412
 413         if( c == NULL ) {
 414 #ifdef NEW_LOGGING
 415                 LDAP_LOG( CONNECTION, INFO,
 416                            "connection_init: skt %d connection table full "
 417                            "(%d/%d)\n", s, i, dtblsize );
 418 #else
 419                 Debug( LDAP_DEBUG_ANY,
 420                                 "connection_init(%d): connection table full "
 421                                 "(%d/%d)\n", s, i, dtblsize);
 422 #endif
 423             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 424             return -1;
 425         }
 426         }
 427 #endif
 428
 429         assert( c != NULL );
 430
 431         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 432                 c->c_send_ldap_result = slap_send_ldap_result;
 433                 c->c_send_search_entry = slap_send_search_entry;
 434                 c->c_send_search_reference = slap_send_search_reference;
 435                 c->c_send_ldap_extended = slap_send_ldap_extended;
 436 #ifdef LDAP_RES_INTERMEDIATE
 437                 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
 438 #endif
 439
 440                 c->c_authmech.bv_val = NULL;
 441                 c->c_authmech.bv_len = 0;
 442                 c->c_dn.bv_val = NULL;
 443                 c->c_dn.bv_len = 0;
 444                 c->c_ndn.bv_val = NULL;
 445                 c->c_ndn.bv_len = 0;
 446
 447                 c->c_listener = NULL;
 448                 c->c_peer_domain.bv_val = NULL;
 449                 c->c_peer_domain.bv_len = 0;
 450                 c->c_peer_name.bv_val = NULL;
 451                 c->c_peer_name.bv_len = 0;
 452
 453                 LDAP_STAILQ_INIT(&c->c_ops);
 454                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 455
 456                 c->c_sasl_bind_mech.bv_val = NULL;
 457                 c->c_sasl_bind_mech.bv_len = 0;
 458                 c->c_sasl_done = 0;
 459                 c->c_sasl_authctx = NULL;
 460                 c->c_sasl_sockctx = NULL;
 461                 c->c_sasl_extra = NULL;
 462                 c->c_sasl_bindop = NULL;
 463
 464                 c->c_sb = ber_sockbuf_alloc( );
 465
 466                 {
 467                         ber_len_t max = sockbuf_max_incoming;
 468                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 469                 }
 470
 471                 c->c_currentber = NULL;
 472
 473                 /* should check status of thread calls */
 474                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 475                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 476                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 477
 478 #ifdef LDAP_SLAPI
 479                 if ( slapi_plugins_used ) {
 480                         slapi_x_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 481                 }
 482 #endif
 483
 484                 c->c_struct_state = SLAP_C_UNUSED;
 485         }
 486
 487     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 488
 489     assert( c->c_struct_state == SLAP_C_UNUSED );
 490     assert( c->c_authmech.bv_val == NULL );
 491     assert( c->c_dn.bv_val == NULL );
 492     assert( c->c_ndn.bv_val == NULL );
 493     assert( c->c_listener == NULL );
 494     assert( c->c_peer_domain.bv_val == NULL );
 495     assert( c->c_peer_name.bv_val == NULL );
 496     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 497     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 498         assert( c->c_sasl_bind_mech.bv_val == NULL );
 499         assert( c->c_sasl_done == 0 );
 500         assert( c->c_sasl_authctx == NULL );
 501         assert( c->c_sasl_sockctx == NULL );
 502         assert( c->c_sasl_extra == NULL );
 503         assert( c->c_sasl_bindop == NULL );
 504         assert( c->c_currentber == NULL );
 505
 506         c->c_listener = listener;
 507
 508         if ( flags == CONN_IS_CLIENT ) {
 509                 c->c_conn_state = SLAP_C_CLIENT;
 510                 c->c_struct_state = SLAP_C_USED;
 511                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 512                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
 513
 514                 return 0;
 515         }
 516
 517         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 518         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 519
 520     c->c_n_ops_received = 0;
 521     c->c_n_ops_executing = 0;
 522     c->c_n_ops_pending = 0;
 523     c->c_n_ops_completed = 0;
 524
 525         c->c_n_get = 0;
 526         c->c_n_read = 0;
 527         c->c_n_write = 0;
 528
 529         /* set to zero until bind, implies LDAP_VERSION3 */
 530         c->c_protocol = 0;
 531
 532 #ifdef SLAPD_MONITOR
 533         c->c_activitytime = c->c_starttime = slap_get_time();
 534 #else
 535         if( global_idletimeout > 0 ) {
 536                 c->c_activitytime = c->c_starttime = slap_get_time();
 537         }
 538 #endif
 539
 540 #ifdef LDAP_CONNECTIONLESS
 541         c->c_is_udp = 0;
 542         if( flags == CONN_IS_UDP ) {
 543                 c->c_is_udp = 1;
 544 #ifdef LDAP_DEBUG
 545                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 546                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 547 #endif
 548                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 549                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 550                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 551                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 552         } else
 553 #endif
 554         {
 555 #ifdef LDAP_DEBUG
 556                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 557                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 558 #endif
 559                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 560                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 561         }
 562
 563 #ifdef LDAP_DEBUG
 564         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 565                 INT_MAX, (void*)"ldap_" );
 566 #endif
 567
 568         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 569                 c /* non-NULL */ ) < 0 )
 570         {
 571 #ifdef NEW_LOGGING
 572                 LDAP_LOG( CONNECTION, INFO,
 573                            "connection_init: conn %lu  set nonblocking failed\n",
 574                            c->c_connid, 0, 0 );
 575 #else
 576                 Debug( LDAP_DEBUG_ANY,
 577                         "connection_init(%d, %s): set nonblocking failed\n",
 578                         s, c->c_peer_name.bv_val, 0 );
 579 #endif
 580         }
 581
 582     id = c->c_connid = conn_nextid++;
 583
 584     c->c_conn_state = SLAP_C_INACTIVE;
 585     c->c_struct_state = SLAP_C_USED;
 586
 587         c->c_ssf = c->c_transport_ssf = ssf;
 588         c->c_tls_ssf = 0;
 589
 590 #ifdef HAVE_TLS
 591     if ( flags == CONN_IS_TLS ) {
 592             c->c_is_tls = 1;
 593             c->c_needs_tls_accept = 1;
 594     } else {
 595             c->c_is_tls = 0;
 596             c->c_needs_tls_accept = 0;
 597     }
 598 #endif
 599
 600         slap_sasl_open( c, 0 );
 601         slap_sasl_external( c, ssf, authid );
 602
 603     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 604     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 605
 606     backend_connection_init(c);
 607
 608     return id;
 609 }
 610
 611 void connection2anonymous( Connection *c )
 612 {
 613         assert( connections != NULL );
 614         assert( c != NULL );
 615
 616         {
 617                 ber_len_t max = sockbuf_max_incoming;
 618                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 619         }
 620
 621         if(c->c_authmech.bv_val != NULL ) {
 622                 free(c->c_authmech.bv_val);
 623                 c->c_authmech.bv_val = NULL;
 624         }
 625         c->c_authmech.bv_len = 0;
 626
 627         if(c->c_dn.bv_val != NULL) {
 628                 free(c->c_dn.bv_val);
 629                 c->c_dn.bv_val = NULL;
 630         }
 631         c->c_dn.bv_len = 0;
 632         if(c->c_ndn.bv_val != NULL) {
 633                 free(c->c_ndn.bv_val);
 634                 c->c_ndn.bv_val = NULL;
 635         }
 636         c->c_ndn.bv_len = 0;
 637
 638         c->c_authz_backend = NULL;
 639 }
 640
 641 static void
 642 connection_destroy( Connection *c )
 643 {
 644         /* note: connections_mutex should be locked by caller */
 645     ber_socket_t        sd;
 646     unsigned long       connid;
 647
 648     assert( connections != NULL );
 649     assert( c != NULL );
 650     assert( c->c_struct_state != SLAP_C_UNUSED );
 651     assert( c->c_conn_state != SLAP_C_INVALID );
 652     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 653
 654     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 655     connid = c->c_connid;
 656
 657     backend_connection_destroy(c);
 658
 659     c->c_protocol = 0;
 660     c->c_connid = -1;
 661
 662     c->c_activitytime = c->c_starttime = 0;
 663
 664         connection2anonymous( c );
 665         c->c_listener = NULL;
 666
 667         if(c->c_peer_domain.bv_val != NULL) {
 668                 free(c->c_peer_domain.bv_val);
 669                 c->c_peer_domain.bv_val = NULL;
 670         }
 671         c->c_peer_domain.bv_len = 0;
 672         if(c->c_peer_name.bv_val != NULL) {
 673                 free(c->c_peer_name.bv_val);
 674                 c->c_peer_name.bv_val = NULL;
 675         }
 676         c->c_peer_name.bv_len = 0;
 677
 678         c->c_sasl_bind_in_progress = 0;
 679         if(c->c_sasl_bind_mech.bv_val != NULL) {
 680                 free(c->c_sasl_bind_mech.bv_val);
 681                 c->c_sasl_bind_mech.bv_val = NULL;
 682         }
 683         c->c_sasl_bind_mech.bv_len = 0;
 684
 685         slap_sasl_close( c );
 686
 687         if ( c->c_currentber != NULL ) {
 688                 ber_free( c->c_currentber, 1 );
 689                 c->c_currentber = NULL;
 690         }
 691
 692         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 693         if ( sd != AC_SOCKET_INVALID ) {
 694                 slapd_remove( sd, 1, 0 );
 695
 696                 Statslog( LDAP_DEBUG_STATS,
 697                     "conn=%lu fd=%ld closed\n",
 698                         connid, (long) sd, 0, 0, 0 );
 699         }
 700
 701         ber_sockbuf_free( c->c_sb );
 702
 703         c->c_sb = ber_sockbuf_alloc( );
 704
 705         {
 706                 ber_len_t max = sockbuf_max_incoming;
 707                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 708         }
 709
 710     c->c_conn_state = SLAP_C_INVALID;
 711     c->c_struct_state = SLAP_C_UNUSED;
 712
 713 #ifdef LDAP_SLAPI
 714         /* call destructors, then constructors; avoids unnecessary allocation */
 715         if ( slapi_plugins_used ) {
 716                 slapi_x_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
 717         }
 718 #endif
 719 }
 720
 721 int connection_state_closing( Connection *c )
 722 {
 723         /* c_mutex must be locked by caller */
 724
 725         int state;
 726         assert( c != NULL );
 727         assert( c->c_struct_state == SLAP_C_USED );
 728
 729         state = c->c_conn_state;
 730
 731         assert( state != SLAP_C_INVALID );
 732
 733         return state == SLAP_C_CLOSING;
 734 }
 735
 736 static void connection_abandon( Connection *c )
 737 {
 738         /* c_mutex must be locked by caller */
 739
 740         Operation *o;
 741
 742         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 743                 o->o_abandon = 1;
 744         }
 745
 746         /* remove pending operations */
 747         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 748                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 749                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 750                 slap_op_free( o );
 751         }
 752 }
 753
 754 void connection_closing( Connection *c )
 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_INVALID );
 760
 761         /* c_mutex must be locked by caller */
 762
 763         if( c->c_conn_state != SLAP_C_CLOSING ) {
 764                 ber_socket_t    sd;
 765
 766                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 767 #ifdef NEW_LOGGING
 768                 LDAP_LOG( CONNECTION, DETAIL1,
 769                            "connection_closing: conn %lu readying socket %d for close.\n",
 770                            c->c_connid, sd, 0 );
 771 #else
 772                 Debug( LDAP_DEBUG_TRACE,
 773                         "connection_closing: readying conn=%lu sd=%d for close\n",
 774                         c->c_connid, sd, 0 );
 775 #endif
 776                 /* update state to closing */
 777                 c->c_conn_state = SLAP_C_CLOSING;
 778
 779                 /* don't listen on this port anymore */
 780                 slapd_clr_read( sd, 1 );
 781
 782                 /* abandon active operations */
 783                 connection_abandon( c );
 784
 785                 /* wake write blocked operations */
 786                 slapd_clr_write( sd, 1 );
 787                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 788         }
 789 }
 790
 791 static void connection_close( Connection *c )
 792 {
 793         ber_socket_t    sd;
 794
 795         assert( connections != NULL );
 796         assert( c != NULL );
 797         assert( c->c_struct_state == SLAP_C_USED );
 798         assert( c->c_conn_state == SLAP_C_CLOSING );
 799
 800         /* note: connections_mutex and c_mutex should be locked by caller */
 801
 802         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 803         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 804 #ifdef NEW_LOGGING
 805                 LDAP_LOG( CONNECTION, DETAIL1,
 806                            "connection_close: conn %lu  deferring sd %d\n",
 807                            c->c_connid, sd, 0 );
 808 #else
 809                 Debug( LDAP_DEBUG_TRACE,
 810                         "connection_close: deferring conn=%lu sd=%d\n",
 811                         c->c_connid, sd, 0 );
 812 #endif
 813                 return;
 814         }
 815
 816 #ifdef NEW_LOGGING
 817         LDAP_LOG( CONNECTION, RESULTS,
 818                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 819 #else
 820         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 821                 c->c_connid, sd, 0 );
 822 #endif
 823         connection_destroy( c );
 824 }
 825
 826 unsigned long connections_nextid(void)
 827 {
 828         unsigned long id;
 829         assert( connections != NULL );
 830
 831         ldap_pvt_thread_mutex_lock( &connections_mutex );
 832
 833         id = conn_nextid;
 834
 835         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 836
 837         return id;
 838 }
 839
 840 Connection* connection_first( ber_socket_t *index )
 841 {
 842         assert( connections != NULL );
 843         assert( index != NULL );
 844
 845         ldap_pvt_thread_mutex_lock( &connections_mutex );
 846
 847         *index = 0;
 848
 849         return connection_next(NULL, index);
 850 }
 851
 852 Connection* connection_next( Connection *c, ber_socket_t *index )
 853 {
 854         assert( connections != NULL );
 855         assert( index != NULL );
 856         assert( *index <= dtblsize );
 857
 858         if( c != NULL ) {
 859                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 860         }
 861
 862         c = NULL;
 863
 864         for(; *index < dtblsize; (*index)++) {
 865                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 866                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 867 #ifndef HAVE_WINSOCK
 868                         continue;
 869 #else
 870                         break;
 871 #endif
 872                 }
 873
 874                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 875                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 876                         c = &connections[(*index)++];
 877                         break;
 878                 }
 879
 880                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 881                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 882         }
 883
 884         if( c != NULL ) {
 885                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 886         }
 887
 888         return c;
 889 }
 890
 891 void connection_done( Connection *c )
 892 {
 893         assert( connections != NULL );
 894
 895         if( c != NULL ) {
 896                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 897         }
 898
 899         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 900 }
 901
 902 /*
 903  * connection_activity - handle the request operation op on connection
 904  * conn.  This routine figures out what kind of operation it is and
 905  * calls the appropriate stub to handle it.
 906  */
 907
 908 #ifdef SLAPD_MONITOR
 909 #define INCR_OP(var,index) \
 910         do { \
 911                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 912                 (var)[(index)]++; \
 913                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 914         } while (0)
 915 #else /* !SLAPD_MONITOR */
 916 #define INCR_OP(var,index)
 917 #endif /* !SLAPD_MONITOR */
 918
 919 static void *
 920 connection_operation( void *ctx, void *arg_v )
 921 {
 922         int rc = SLAPD_DISCONNECT;
 923         Operation *op = arg_v;
 924         SlapReply rs = {REP_RESULT};
 925         ber_tag_t tag = op->o_tag;
 926 #ifdef SLAPD_MONITOR
 927         ber_tag_t oldtag = tag;
 928 #endif /* SLAPD_MONITOR */
 929         Connection *conn = op->o_conn;
 930         void *memctx = NULL;
 931         ber_len_t memsiz;
 932
 933         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 934         num_ops_initiated++;
 935         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 936
 937         op->o_threadctx = ctx;
 938
 939         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 940 #ifdef NEW_LOGGING
 941                 LDAP_LOG( CONNECTION, ERR,
 942                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 943                         conn->c_connid, (long)tag, 0 );
 944 #else
 945                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 946                         "error: SASL bind in progress (tag=%ld).\n",
 947                         (long) tag, 0, 0 );
 948 #endif
 949                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 950                         "SASL bind in progress" );
 951                 goto operations_error;
 952         }
 953
 954         /* We can use Thread-Local storage for most mallocs. We can
 955          * also use TL for ber parsing, but not on Add or Modify.
 956          */
 957 #define SLAB_SIZE       1048576
 958 #if 0
 959         memsiz = ber_len( op->o_ber ) * 64;
 960         if ( SLAB_SIZE > memsiz ) memsiz = SLAB_SIZE;
 961 #endif
 962         memsiz = SLAB_SIZE;
 963
 964         memctx = sl_mem_create( memsiz, ctx );
 965         op->o_tmpmemctx = memctx;
 966         op->o_tmpmfuncs = &sl_mfuncs;
 967         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
 968                 /* Note - the ber and its buffer are already allocated from
 969                  * regular memory; this only affects subsequent mallocs that
 970                  * ber_scanf may invoke.
 971                  */
 972                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
 973         }
 974
 975         switch ( tag ) {
 976         case LDAP_REQ_BIND:
 977                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 978                 rc = do_bind( op, &rs );
 979                 break;
 980
 981         case LDAP_REQ_UNBIND:
 982                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 983                 rc = do_unbind( op, &rs );
 984                 break;
 985
 986         case LDAP_REQ_ADD:
 987                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 988                 rc = do_add( op, &rs );
 989                 break;
 990
 991         case LDAP_REQ_DELETE:
 992                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 993                 rc = do_delete( op, &rs );
 994                 break;
 995
 996         case LDAP_REQ_MODRDN:
 997                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 998                 rc = do_modrdn( op, &rs );
 999                 break;
1000
1001         case LDAP_REQ_MODIFY:
1002                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
1003                 rc = do_modify( op, &rs );
1004                 break;
1005
1006         case LDAP_REQ_COMPARE:
1007                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
1008                 rc = do_compare( op, &rs );
1009                 break;
1010
1011         case LDAP_REQ_SEARCH:
1012                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
1013                 rc = do_search( op, &rs );
1014                 break;
1015
1016         case LDAP_REQ_ABANDON:
1017                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
1018                 rc = do_abandon( op, &rs );
1019                 break;
1020
1021         case LDAP_REQ_EXTENDED:
1022                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
1023                 rc = do_extended( op, &rs );
1024                 break;
1025
1026         default:
1027 #ifdef NEW_LOGGING
1028                 LDAP_LOG( CONNECTION, INFO,
1029                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
1030                            conn->c_connid, tag, 0  );
1031 #else
1032                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
1033                     tag, 0, 0 );
1034 #endif
1035                 op->o_tag = LBER_ERROR;
1036                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1037                 rs.sr_text = "unknown LDAP request";
1038                 send_ldap_disconnect( op, &rs );
1039                 rc = -1;
1040                 break;
1041         }
1042
1043 #ifdef SLAPD_MONITOR
1044         oldtag = tag;
1045 #endif /* SLAPD_MONITOR */
1046         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1047
1048 operations_error:
1049         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1050         num_ops_completed++;
1051 #ifdef SLAPD_MONITOR
1052         switch (oldtag) {
1053         case LDAP_REQ_BIND:
1054                 num_ops_completed_[SLAP_OP_BIND]++;
1055                 break;
1056         case LDAP_REQ_UNBIND:
1057                 num_ops_completed_[SLAP_OP_UNBIND]++;
1058                 break;
1059         case LDAP_REQ_ADD:
1060                 num_ops_completed_[SLAP_OP_ADD]++;
1061                 break;
1062         case LDAP_REQ_DELETE:
1063                 num_ops_completed_[SLAP_OP_DELETE]++;
1064                 break;
1065         case LDAP_REQ_MODRDN:
1066                 num_ops_completed_[SLAP_OP_MODRDN]++;
1067                 break;
1068         case LDAP_REQ_MODIFY:
1069                 num_ops_completed_[SLAP_OP_MODIFY]++;
1070                 break;
1071         case LDAP_REQ_COMPARE:
1072                 num_ops_completed_[SLAP_OP_COMPARE]++;
1073                 break;
1074         case LDAP_REQ_SEARCH:
1075                 num_ops_completed_[SLAP_OP_SEARCH]++;
1076                 break;
1077         case LDAP_REQ_ABANDON:
1078                 num_ops_completed_[SLAP_OP_ABANDON]++;
1079                 break;
1080         case LDAP_REQ_EXTENDED:
1081                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1082                 break;
1083         }
1084 #endif /* SLAPD_MONITOR */
1085         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1086
1087 #ifdef LDAP_EXOP_X_CANCEL
1088         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1089                 op->o_cancel = LDAP_TOO_LATE;
1090         }
1091
1092         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1093                 op->o_cancel != SLAP_CANCEL_DONE )
1094         {
1095                 ldap_pvt_thread_yield();
1096         }
1097 #endif
1098
1099         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1100
1101         if ( op->o_cancel != SLAP_CANCEL_ACK && ( op->o_sync_mode & SLAP_SYNC_PERSIST ) ) {
1102                 sl_mem_detach( ctx, memctx );
1103                 goto no_co_op_free;
1104         }
1105
1106         LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1107         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1108
1109         conn->c_n_ops_executing--;
1110         conn->c_n_ops_completed++;
1111         memctx = NULL;
1112         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1113         slap_op_free( op );
1114
1115 no_co_op_free:
1116
1117         switch( tag ) {
1118         case LBER_ERROR:
1119         case LDAP_REQ_UNBIND:
1120                 /* c_mutex is locked */
1121                 connection_closing( conn );
1122                 break;
1123
1124         case LDAP_REQ_BIND:
1125                 conn->c_sasl_bind_in_progress =
1126                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1127
1128                 if( conn->c_conn_state == SLAP_C_BINDING) {
1129                         conn->c_conn_state = SLAP_C_ACTIVE;
1130                 }
1131         }
1132
1133         connection_resched( conn );
1134
1135         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1136
1137         return NULL;
1138 }
1139
1140 int connection_client_setup(
1141         ber_socket_t s,
1142         Listener *l,
1143         ldap_pvt_thread_start_t *func,
1144         void *arg )
1145 {
1146         Connection *c;
1147
1148         if ( connection_init( s, l, "", "", CONN_IS_CLIENT, 0, "" ) < 0 ) {
1149                 return -1;
1150         }
1151
1152         c = connection_get( s );
1153         c->c_clientfunc = func;
1154         c->c_clientarg = arg;
1155         connection_return( c );
1156         slapd_add_internal( s, 0 );
1157         slapd_set_read( s, 1 );
1158         return 0;
1159 }
1160
1161 void connection_client_enable(
1162         ber_socket_t s
1163 )
1164 {
1165         slapd_set_read( s, 1 );
1166 }
1167
1168 void connection_client_stop(
1169         ber_socket_t s
1170 )
1171 {
1172         Connection *c;
1173
1174         /* get (locked) connection */
1175         c = connection_get( s );
1176
1177         assert( c->c_conn_state == SLAP_C_CLIENT );
1178
1179         c->c_listener = NULL;
1180         c->c_conn_state = SLAP_C_INVALID;
1181         c->c_struct_state = SLAP_C_UNUSED;
1182         connection_return( c );
1183         slapd_remove( s, 0, 1 );
1184 }
1185
1186 int connection_read(ber_socket_t s)
1187 {
1188         int rc = 0;
1189         Connection *c;
1190
1191         assert( connections != NULL );
1192
1193         ldap_pvt_thread_mutex_lock( &connections_mutex );
1194
1195         /* get (locked) connection */
1196         c = connection_get( s );
1197
1198         if( c == NULL ) {
1199 #ifdef NEW_LOGGING
1200                 LDAP_LOG( CONNECTION, INFO,
1201                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1202 #else
1203                 Debug( LDAP_DEBUG_ANY,
1204                         "connection_read(%ld): no connection!\n",
1205                         (long) s, 0, 0 );
1206 #endif
1207                 slapd_remove(s, 1, 0);
1208
1209                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1210                 return -1;
1211         }
1212
1213         c->c_n_read++;
1214
1215         if( c->c_conn_state == SLAP_C_CLOSING ) {
1216 #ifdef NEW_LOGGING
1217                 LDAP_LOG( CONNECTION, INFO,
1218                         "connection_read: conn %lu connection closing, ignoring input\n",
1219                         c->c_connid, 0, 0 );
1220 #else
1221                 Debug( LDAP_DEBUG_TRACE,
1222                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1223                         s, c->c_connid, 0 );
1224 #endif
1225                 connection_return( c );
1226                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1227                 return 0;
1228         }
1229
1230         if ( c->c_conn_state == SLAP_C_CLIENT ) {
1231                 slapd_clr_read( s, 0 );
1232                 ldap_pvt_thread_pool_submit( &connection_pool,
1233                         c->c_clientfunc, c->c_clientarg );
1234                 connection_return( c );
1235                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1236                 return 0;
1237         }
1238
1239 #ifdef NEW_LOGGING
1240         LDAP_LOG( CONNECTION, DETAIL1,
1241                    "connection_read: conn %lu  checking for input.\n",
1242                    c->c_connid, 0, 0  );
1243 #else
1244         Debug( LDAP_DEBUG_TRACE,
1245                 "connection_read(%d): checking for input on id=%lu\n",
1246                 s, c->c_connid, 0 );
1247 #endif
1248
1249 #ifdef HAVE_TLS
1250         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1251                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1252                 if ( rc < 0 ) {
1253 #if 0 /* required by next #if 0 */
1254                         struct timeval tv;
1255                         fd_set rfd;
1256 #endif
1257
1258 #ifdef NEW_LOGGING
1259                         LDAP_LOG( CONNECTION, ERR,
1260                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1261                                    c->c_connid, rc, 0 );
1262 #else
1263                         Debug( LDAP_DEBUG_TRACE,
1264                                 "connection_read(%d): TLS accept error "
1265                                 "error=%d id=%lu, closing\n",
1266                                 s, rc, c->c_connid );
1267 #endif
1268                         c->c_needs_tls_accept = 0;
1269                         /* connections_mutex and c_mutex are locked */
1270                         connection_closing( c );
1271
1272 #if 0
1273                         /* Drain input before close, to allow SSL error codes
1274                          * to propagate to client. */
1275                         FD_ZERO(&rfd);
1276                         FD_SET(s, &rfd);
1277                         for (rc=1; rc>0;) {
1278                             tv.tv_sec = 1;
1279                             tv.tv_usec = 0;
1280                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1281                             if (rc == 1) {
1282                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1283                                 }
1284                         }
1285 #endif
1286                         connection_close( c );
1287
1288                 } else if ( rc == 0 ) {
1289                         void *ssl;
1290                         struct berval authid = { 0, NULL };
1291
1292                         c->c_needs_tls_accept = 0;
1293
1294                         /* we need to let SASL know */
1295                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1296
1297                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1298                         if( c->c_tls_ssf > c->c_ssf ) {
1299                                 c->c_ssf = c->c_tls_ssf;
1300                         }
1301
1302                         rc = dnX509peerNormalize( ssl, &authid );
1303                         if ( rc != LDAP_SUCCESS ) {
1304 #ifdef NEW_LOGGING
1305                                 LDAP_LOG( CONNECTION, INFO,
1306                                         "connection_read: conn %lu unable to get TLS client DN, "
1307                                         "error %d\n", c->c_connid, rc, 0 );
1308 #else
1309                                 Debug( LDAP_DEBUG_TRACE,
1310                                 "connection_read(%d): unable to get TLS client DN "
1311                                 "error=%d id=%lu\n",
1312                                 s, rc, c->c_connid );
1313 #endif
1314                         }
1315                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1316                         if ( authid.bv_val )    free( authid.bv_val );
1317                 }
1318
1319                 /* if success and data is ready, fall thru to data input loop */
1320                 if( rc != 0 ||
1321                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1322                 {
1323                         connection_return( c );
1324                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1325                         return 0;
1326                 }
1327         }
1328 #endif
1329
1330 #ifdef HAVE_CYRUS_SASL
1331         if ( c->c_sasl_layers ) {
1332                 /* If previous layer is not removed yet, give up for now */
1333                 if ( !c->c_sasl_sockctx ) {
1334                         connection_return( c );
1335                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1336                         return 0;
1337                 }
1338
1339                 c->c_sasl_layers = 0;
1340
1341                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_sockctx );
1342
1343                 if( rc != LDAP_SUCCESS ) {
1344 #ifdef NEW_LOGGING
1345                         LDAP_LOG( CONNECTION, ERR,
1346                                 "connection_read: conn %lu SASL install error %d, closing\n",
1347                                 c->c_connid, rc, 0 );
1348 #else
1349                         Debug( LDAP_DEBUG_TRACE,
1350                                 "connection_read(%d): SASL install error "
1351                                 "error=%d id=%lu, closing\n",
1352                                 s, rc, c->c_connid );
1353 #endif
1354                         /* connections_mutex and c_mutex are locked */
1355                         connection_closing( c );
1356                         connection_close( c );
1357                         connection_return( c );
1358                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1359                         return 0;
1360                 }
1361         }
1362 #endif
1363
1364 #define CONNECTION_INPUT_LOOP 1
1365 /* #define      DATA_READY_LOOP 1 */
1366
1367         do
1368         {
1369                 /* How do we do this without getting into a busy loop ? */
1370                 rc = connection_input( c );
1371         }
1372 #ifdef DATA_READY_LOOP
1373         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1374 #elif CONNECTION_INPUT_LOOP
1375         while(!rc);
1376 #else
1377         while(0);
1378 #endif
1379
1380         if( rc < 0 ) {
1381 #ifdef NEW_LOGGING
1382                 LDAP_LOG( CONNECTION, ERR,
1383                         "connection_read: conn %lu  input error %d, closing.\n",
1384                         c->c_connid, rc, 0 );
1385 #else
1386                 Debug( LDAP_DEBUG_TRACE,
1387                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1388                         s, rc, c->c_connid );
1389 #endif
1390                 /* connections_mutex and c_mutex are locked */
1391                 connection_closing( c );
1392                 connection_close( c );
1393                 connection_return( c );
1394                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1395                 return 0;
1396         }
1397
1398         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1399                 slapd_set_read( s, 1 );
1400         }
1401
1402         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1403                 slapd_set_write( s, 1 );
1404         }
1405
1406         connection_return( c );
1407         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1408         return 0;
1409 }
1410
1411 static int
1412 connection_input(
1413     Connection *conn
1414 )
1415 {
1416         Operation *op;
1417         ber_tag_t       tag;
1418         ber_len_t       len;
1419         ber_int_t       msgid;
1420         BerElement      *ber;
1421         int             rc;
1422 #ifdef LDAP_CONNECTIONLESS
1423         Sockaddr        peeraddr;
1424         char            *cdn = NULL;
1425 #endif
1426
1427         if ( conn->c_currentber == NULL &&
1428                 ( conn->c_currentber = ber_alloc()) == NULL )
1429         {
1430 #ifdef NEW_LOGGING
1431                 LDAP_LOG( CONNECTION, ERR,
1432                         "connection_input: conn %lu  ber_alloc failed.\n",
1433                         conn->c_connid, 0, 0 );
1434 #else
1435                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1436 #endif
1437                 return -1;
1438         }
1439
1440         errno = 0;
1441
1442 #ifdef LDAP_CONNECTIONLESS
1443         if ( conn->c_is_udp ) {
1444                 char    peername[sizeof("IP=255.255.255.255:65336")];
1445                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1446                         sizeof(struct sockaddr));
1447                 if (len != sizeof(struct sockaddr))
1448                         return 1;
1449                 sprintf( peername, "IP=%s:%d",
1450                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1451                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1452                 Statslog( LDAP_DEBUG_STATS,
1453                         "conn=%lu UDP request from %s (%s) accepted.\n",
1454                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1455         }
1456 #endif
1457         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1458         if ( tag != LDAP_TAG_MESSAGE ) {
1459                 int err = errno;
1460                 ber_socket_t    sd;
1461
1462                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1463
1464 #ifdef NEW_LOGGING
1465                 LDAP_LOG( CONNECTION, ERR,
1466                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1467                         conn->c_connid, err, sock_errstr(err) );
1468 #else
1469                 Debug( LDAP_DEBUG_TRACE,
1470                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1471                         sd, err, sock_errstr(err) );
1472 #endif
1473                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1474                         /* log, close and send error */
1475                         ber_free( conn->c_currentber, 1 );
1476                         conn->c_currentber = NULL;
1477
1478                         return -2;
1479                 }
1480                 return 1;
1481         }
1482
1483         ber = conn->c_currentber;
1484         conn->c_currentber = NULL;
1485
1486         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1487                 /* log, close and send error */
1488 #ifdef NEW_LOGGING
1489                 LDAP_LOG( CONNECTION, ERR,
1490                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1491                         conn->c_connid, tag, 0 );
1492 #else
1493                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1494                     0 );
1495 #endif
1496                 ber_free( ber, 1 );
1497                 return -1;
1498         }
1499
1500         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1501                 /* log, close and send error */
1502 #ifdef NEW_LOGGING
1503                 LDAP_LOG( CONNECTION, ERR,
1504                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1505                            conn->c_connid, tag, 0 );
1506 #else
1507                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1508                     0 );
1509 #endif
1510                 ber_free( ber, 1 );
1511
1512                 return -1;
1513         }
1514
1515 #ifdef LDAP_CONNECTIONLESS
1516         if( conn->c_is_udp ) {
1517                 if( tag == LBER_OCTETSTRING ) {
1518                         ber_get_stringa( ber, &cdn );
1519                         tag = ber_peek_tag(ber, &len);
1520                 }
1521                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1522 #ifdef NEW_LOGGING
1523                     LDAP_LOG( CONNECTION, ERR,
1524                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1525                                conn->c_connid, tag, 0 );
1526 #else
1527                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1528                         0 );
1529 #endif
1530                     ber_free( ber, 1 );
1531                     return 0;
1532                 }
1533         }
1534 #endif
1535         if(tag == LDAP_REQ_BIND) {
1536                 /* immediately abandon all exiting operations upon BIND */
1537                 connection_abandon( conn );
1538         }
1539
1540         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1541
1542         op->o_conn = conn;
1543         op->o_assertion = NULL;
1544         op->o_preread_attrs = NULL;
1545         op->o_postread_attrs = NULL;
1546         op->o_vrFilter = NULL;
1547
1548 #ifdef LDAP_CONTROL_PAGEDRESULTS
1549         op->o_pagedresults_state = conn->c_pagedresults_state;
1550 #endif
1551
1552         op->o_res_ber = NULL;
1553
1554 #ifdef LDAP_CONNECTIONLESS
1555         if (conn->c_is_udp) {
1556                 if ( cdn ) {
1557                     ber_str2bv( cdn, 0, 1, &op->o_dn );
1558                     op->o_protocol = LDAP_VERSION2;
1559                 }
1560                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1561                 if (op->o_res_ber == NULL) return 1;
1562
1563                 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1564                         sizeof(struct sockaddr), 0 );
1565
1566                 if (rc != sizeof(struct sockaddr)) {
1567 #ifdef NEW_LOGGING
1568                         LDAP_LOG( CONNECTION, INFO,
1569                                 "connection_input: conn %lu  ber_write failed\n",
1570                                 conn->c_connid, 0, 0 );
1571 #else
1572                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1573 #endif
1574                         return 1;
1575                 }
1576
1577                 if (op->o_protocol == LDAP_VERSION2) {
1578                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1579                         if (rc == -1) {
1580 #ifdef NEW_LOGGING
1581                                 LDAP_LOG( CONNECTION, INFO,
1582                                         "connection_input: conn %lu  put outer sequence failed\n",
1583                                         conn->c_connid, 0, 0 );
1584 #else
1585                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1586 #endif
1587                                 return rc;
1588                         }
1589                 }
1590         }
1591 #endif /* LDAP_CONNECTIONLESS */
1592
1593         rc = 0;
1594
1595         /* Don't process requests when the conn is in the middle of a
1596          * Bind, or if it's closing. Also, don't let any single conn
1597          * use up all the available threads, and don't execute if we're
1598          * currently blocked on output. And don't execute if there are
1599          * already pending ops, let them go first.
1600          *
1601          * But always allow Abandon through; it won't cost much.
1602          */
1603         if ( tag != LDAP_REQ_ABANDON && (conn->c_conn_state == SLAP_C_BINDING
1604                 || conn->c_conn_state == SLAP_C_CLOSING
1605                 || conn->c_n_ops_executing >= connection_pool_max/2
1606                 || conn->c_n_ops_pending
1607                 || conn->c_writewaiter))
1608         {
1609                 int max = conn->c_dn.bv_len ? slap_conn_max_pending_auth
1610                          : slap_conn_max_pending;
1611 #ifdef NEW_LOGGING
1612                 LDAP_LOG( CONNECTION, INFO,
1613                         "connection_input: conn %lu  deferring operation\n",
1614                         conn->c_connid, 0, 0 );
1615 #else
1616                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1617 #endif
1618                 conn->c_n_ops_pending++;
1619                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1620                 if ( conn->c_n_ops_pending > max ) {
1621                         rc = -1;
1622                 } else {
1623                         rc = 1;
1624                 }
1625         } else {
1626                 conn->c_n_ops_executing++;
1627                 connection_op_activate( op );
1628         }
1629
1630 #ifdef NO_THREADS
1631         if ( conn->c_struct_state != SLAP_C_USED ) {
1632                 /* connection must have got closed underneath us */
1633                 return 1;
1634         }
1635 #endif
1636         assert( conn->c_struct_state == SLAP_C_USED );
1637
1638         return rc;
1639 }
1640
1641 static int
1642 connection_resched( Connection *conn )
1643 {
1644         Operation *op;
1645
1646         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1647                 int rc;
1648                 ber_socket_t    sd;
1649                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1650
1651                 /* us trylock to avoid possible deadlock */
1652                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1653
1654                 if( rc ) {
1655 #ifdef NEW_LOGGING
1656                         LDAP_LOG( CONNECTION, DETAIL1,
1657                                 "connection_resched: conn %lu  reaquiring locks.\n",
1658                                 conn->c_connid, 0, 0 );
1659 #else
1660                         Debug( LDAP_DEBUG_TRACE,
1661                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1662                                 conn->c_connid, sd, 0 );
1663 #endif
1664                         /*
1665                          * reaquire locks in the right order...
1666                          * this may allow another thread to close this connection,
1667                          * so recheck state below.
1668                          */
1669                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1670                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1671                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1672                 }
1673
1674                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1675 #ifdef NEW_LOGGING
1676                         LDAP_LOG( CONNECTION, INFO,
1677                                 "connection_resched: conn %lu  closed by other thread.\n",
1678                                 conn->c_connid, 0, 0 );
1679 #else
1680                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1681                                 "closed by other thread conn=%lu sd=%d\n",
1682                                 conn->c_connid, sd, 0 );
1683 #endif
1684                 } else {
1685 #ifdef NEW_LOGGING
1686                         LDAP_LOG( CONNECTION, DETAIL1,
1687                                 "connection_resched: conn %lu  attempting closing.\n",
1688                                 conn->c_connid, 0, 0 );
1689 #else
1690                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1691                                 "attempting closing conn=%lu sd=%d\n",
1692                                 conn->c_connid, sd, 0 );
1693 #endif
1694                         connection_close( conn );
1695                 }
1696
1697                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1698                 return 0;
1699         }
1700
1701         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1702                 /* other states need different handling */
1703                 return 0;
1704         }
1705
1706         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1707                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1708                         break;
1709                 }
1710                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1711                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1712                 /* pending operations should not be marked for abandonment */
1713                 assert(!op->o_abandon);
1714
1715                 conn->c_n_ops_pending--;
1716                 conn->c_n_ops_executing++;
1717
1718                 connection_op_activate( op );
1719
1720                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1721                         break;
1722                 }
1723         }
1724         return 0;
1725 }
1726
1727 static int connection_op_activate( Operation *op )
1728 {
1729         int status;
1730         ber_tag_t tag = op->o_tag;
1731
1732         if(tag == LDAP_REQ_BIND) {
1733                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1734         }
1735
1736         if (!op->o_dn.bv_len) {
1737             op->o_authz = op->o_conn->c_authz;
1738             ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1739             ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1740         }
1741         op->o_authtype = op->o_conn->c_authtype;
1742         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1743
1744         if (!op->o_protocol) {
1745             op->o_protocol = op->o_conn->c_protocol
1746                 ? op->o_conn->c_protocol : LDAP_VERSION3;
1747         }
1748         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1749                 && op->o_protocol > LDAP_VERSION2) {
1750                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1751         }
1752
1753         op->o_connid = op->o_conn->c_connid;
1754
1755         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1756
1757         status = ldap_pvt_thread_pool_submit( &connection_pool,
1758                 connection_operation, (void *) op );
1759
1760         if ( status != 0 ) {
1761 #ifdef NEW_LOGGING
1762                 LDAP_LOG( CONNECTION, ERR,
1763                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1764                         op->o_connid, 0, 0 );
1765 #else
1766                 Debug( LDAP_DEBUG_ANY,
1767                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1768 #endif
1769                 /* should move op to pending list */
1770         }
1771
1772         return status;
1773 }
1774
1775 int connection_write(ber_socket_t s)
1776 {
1777         Connection *c;
1778
1779         assert( connections != NULL );
1780
1781         ldap_pvt_thread_mutex_lock( &connections_mutex );
1782
1783         c = connection_get( s );
1784
1785         slapd_clr_write( s, 0);
1786
1787         if( c == NULL ) {
1788 #ifdef NEW_LOGGING
1789                 LDAP_LOG( CONNECTION, ERR,
1790                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1791 #else
1792                 Debug( LDAP_DEBUG_ANY,
1793                         "connection_write(%ld): no connection!\n",
1794                         (long) s, 0, 0 );
1795 #endif
1796                 slapd_remove(s, 1, 0);
1797                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1798                 return -1;
1799         }
1800
1801         c->c_n_write++;
1802
1803 #ifdef NEW_LOGGING
1804         LDAP_LOG( CONNECTION, DETAIL1,
1805                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1806 #else
1807         Debug( LDAP_DEBUG_TRACE,
1808                 "connection_write(%d): waking output for id=%lu\n",
1809                 s, c->c_connid, 0 );
1810 #endif
1811         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1812
1813         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1814                 slapd_set_read( s, 1 );
1815         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1816                 slapd_set_write( s, 1 );
1817         connection_return( c );
1818         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1819         return 0;
1820 }
1821