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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6
   7 #include "portable.h"
   8
   9 #include <stdio.h>
  10 #include <limits.h>
  11
  12 #include <ac/socket.h>
  13 #include <ac/errno.h>
  14 #include <ac/string.h>
  15 #include <ac/time.h>
  16 #include <ac/unistd.h>
  17
  18 #include "ldap_pvt.h"
  19 #include "lutil.h"
  20 #include "slap.h"
  21
  22 /* protected by connections_mutex */
  23 static ldap_pvt_thread_mutex_t connections_mutex;
  24 static Connection *connections = NULL;
  25 static unsigned long conn_nextid = 0;
  26
  27 /* structure state (protected by connections_mutex) */
  28 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  29 #define SLAP_C_UNUSED                   0x01
  30 #define SLAP_C_USED                             0x02
  31
  32 /* connection state (protected by c_mutex ) */
  33 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  34 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  35 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  36 #define SLAP_C_BINDING                  0x03    /* binding */
  37 #define SLAP_C_CLOSING                  0x04    /* closing */
  38
  39 const char *
  40 connection_state2str( int state )
  41 {
  42         switch( state ) {
  43         case SLAP_C_INVALID:    return "!";
  44         case SLAP_C_INACTIVE:   return "|";
  45         case SLAP_C_ACTIVE:             return "";
  46         case SLAP_C_BINDING:    return "B";
  47         case SLAP_C_CLOSING:    return "C";
  48         }
  49
  50         return "?";
  51 }
  52
  53 static Connection* connection_get( ber_socket_t s );
  54
  55 static int connection_input( Connection *c );
  56 static void connection_close( Connection *c );
  57
  58 static int connection_op_activate( Operation *op );
  59 static int connection_resched( Connection *conn );
  60 static void connection_abandon( Connection *conn );
  61 static void connection_destroy( Connection *c );
  62
  63 static ldap_pvt_thread_start_t connection_operation;
  64
  65 /*
  66  * Initialize connection management infrastructure.
  67  */
  68 int connections_init(void)
  69 {
  70         assert( connections == NULL );
  71
  72         if( connections != NULL) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( CONNECTION, INFO,
  75                            "connections_init:  already initialized.\n", 0, 0, 0 );
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  78                         0, 0, 0 );
  79 #endif
  80                 return -1;
  81         }
  82
  83         /* should check return of every call */
  84         ldap_pvt_thread_mutex_init( &connections_mutex );
  85
  86         connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
  87
  88         if( connections == NULL ) {
  89 #ifdef NEW_LOGGING
  90                 LDAP_LOG( CONNECTION, ERR,
  91                            "connections_init: allocation (%d * %ld) of connection "
  92                            "array failed\n", dtblsize, (long) sizeof(Connection), 0 );
  93 #else
  94                 Debug( LDAP_DEBUG_ANY,
  95                         "connections_init: allocation (%d*%ld) of connection array failed\n",
  96                         dtblsize, (long) sizeof(Connection), 0 );
  97 #endif
  98                 return -1;
  99         }
 100
 101     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 102     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 103
 104         /*
 105          * per entry initialization of the Connection array initialization
 106          * will be done by connection_init()
 107          */
 108
 109         return 0;
 110 }
 111
 112 /*
 113  * Destroy connection management infrastructure.
 114  */
 115 int connections_destroy(void)
 116 {
 117         ber_socket_t i;
 118
 119         /* should check return of every call */
 120
 121         if( connections == NULL) {
 122 #ifdef NEW_LOGGING
 123                 LDAP_LOG( CONNECTION, INFO,
 124                            "connections_destroy: nothing to destroy.\n", 0, 0, 0 );
 125 #else
 126                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 127                         0, 0, 0 );
 128 #endif
 129                 return -1;
 130         }
 131
 132         for ( i = 0; i < dtblsize; i++ ) {
 133                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 134                         ber_sockbuf_free( connections[i].c_sb );
 135                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 136                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 137                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 138                 }
 139         }
 140
 141         free( connections );
 142         connections = NULL;
 143
 144         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 145         return 0;
 146 }
 147
 148 /*
 149  * shutdown all connections
 150  */
 151 int connections_shutdown(void)
 152 {
 153         ber_socket_t i;
 154
 155         ldap_pvt_thread_mutex_lock( &connections_mutex );
 156
 157         for ( i = 0; i < dtblsize; i++ ) {
 158                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 159                         continue;
 160                 }
 161
 162                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 163
 164                 /* connections_mutex and c_mutex are locked */
 165                 connection_closing( &connections[i] );
 166                 connection_close( &connections[i] );
 167
 168                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 169         }
 170
 171         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 172
 173         return 0;
 174 }
 175
 176 /*
 177  * Timeout idle connections.
 178  */
 179 int connections_timeout_idle(time_t now)
 180 {
 181         int i = 0;
 182         int connindex;
 183         Connection* c;
 184
 185         for( c = connection_first( &connindex );
 186                 c != NULL;
 187                 c = connection_next( c, &connindex ) )
 188         {
 189                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 190                         /* close it */
 191                         connection_closing( c );
 192                         connection_close( c );
 193                         i++;
 194                 }
 195         }
 196         connection_done( c );
 197
 198         return i;
 199 }
 200
 201 static Connection* connection_get( ber_socket_t s )
 202 {
 203         /* connections_mutex should be locked by caller */
 204
 205         Connection *c;
 206
 207 #ifdef NEW_LOGGING
 208         LDAP_LOG( CONNECTION, ENTRY, "connection_get: socket %ld\n", (long)s, 0, 0 );
 209 #else
 210         Debug( LDAP_DEBUG_ARGS,
 211                 "connection_get(%ld)\n",
 212                 (long) s, 0, 0 );
 213 #endif
 214
 215         assert( connections != NULL );
 216
 217         if(s == AC_SOCKET_INVALID) {
 218                 return NULL;
 219         }
 220
 221 #ifndef HAVE_WINSOCK
 222         c = &connections[s];
 223
 224         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 225
 226 #else
 227         c = NULL;
 228         {
 229                 ber_socket_t i, sd;
 230
 231                 for(i=0; i<dtblsize; i++) {
 232                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 233                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 234                                 assert( connections[i].c_sb == 0 );
 235                                 break;
 236                         }
 237
 238                         ber_sockbuf_ctrl( connections[i].c_sb,
 239                                 LBER_SB_OPT_GET_FD, &sd );
 240
 241                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 242                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 243                                 assert( sd == AC_SOCKET_INVALID );
 244                                 continue;
 245                         }
 246
 247                         /* state can actually change from used -> unused by resched,
 248                          * so don't assert details here.
 249                          */
 250
 251                         if( sd == s ) {
 252                                 c = &connections[i];
 253                                 break;
 254                         }
 255                 }
 256         }
 257 #endif
 258
 259         if( c != NULL ) {
 260                 ber_socket_t    sd;
 261
 262                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 263
 264                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 265                 if( c->c_struct_state != SLAP_C_USED ) {
 266                         /* connection must have been closed due to resched */
 267
 268                         assert( c->c_conn_state == SLAP_C_INVALID );
 269                         assert( sd == AC_SOCKET_INVALID );
 270
 271 #ifdef NEW_LOGGING
 272                         LDAP_LOG( CONNECTION, ARGS,
 273                                 "connection_get:  connection %d not used\n", s, 0, 0 );
 274 #else
 275                         Debug( LDAP_DEBUG_TRACE,
 276                                 "connection_get(%d): connection not used\n",
 277                                 s, 0, 0 );
 278 #endif
 279
 280                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 281                         return NULL;
 282                 }
 283
 284 #ifdef NEW_LOGGING
 285                 LDAP_LOG( CONNECTION, RESULTS,
 286                         "connection_get: get for %d got connid %lu\n", s, c->c_connid, 0 );
 287 #else
 288                 Debug( LDAP_DEBUG_TRACE,
 289                         "connection_get(%d): got connid=%lu\n",
 290                         s, c->c_connid, 0 );
 291 #endif
 292
 293                 c->c_n_get++;
 294
 295                 assert( c->c_struct_state == SLAP_C_USED );
 296                 assert( c->c_conn_state != SLAP_C_INVALID );
 297                 assert( sd != AC_SOCKET_INVALID );
 298
 299 #ifdef SLAPD_MONITOR
 300                 c->c_activitytime = slap_get_time();
 301 #else
 302                 if( global_idletimeout > 0 ) {
 303                         c->c_activitytime = slap_get_time();
 304                 }
 305 #endif
 306         }
 307
 308         return c;
 309 }
 310
 311 static void connection_return( Connection *c )
 312 {
 313         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 314 }
 315
 316 long connection_init(
 317         ber_socket_t s,
 318         Listener *listener,
 319         const char* dnsname,
 320         const char* peername,
 321         int tls_udp_option,
 322         slap_ssf_t ssf,
 323         const char *authid )
 324 {
 325         unsigned long id;
 326         Connection *c;
 327
 328         assert( connections != NULL );
 329
 330         assert( listener != NULL );
 331         assert( dnsname != NULL );
 332         assert( peername != NULL );
 333
 334 #ifndef HAVE_TLS
 335         assert( tls_udp_option != 1 );
 336 #endif
 337
 338         if( s == AC_SOCKET_INVALID ) {
 339 #ifdef NEW_LOGGING
 340                 LDAP_LOG( CONNECTION, INFO,
 341                            "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
 342 #else
 343                 Debug( LDAP_DEBUG_ANY,
 344                        "connection_init(%ld): invalid.\n",
 345                        (long) s, 0, 0 );
 346 #endif
 347                 return -1;
 348         }
 349
 350         assert( s >= 0 );
 351 #ifndef HAVE_WINSOCK
 352         assert( s < dtblsize );
 353 #endif
 354
 355         ldap_pvt_thread_mutex_lock( &connections_mutex );
 356
 357 #ifndef HAVE_WINSOCK
 358         c = &connections[s];
 359
 360 #else
 361         {
 362                 ber_socket_t    i;
 363
 364                 c = NULL;
 365
 366         for( i=0; i < dtblsize; i++) {
 367                 ber_socket_t    sd;
 368
 369             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 370                 assert( connections[i].c_sb == 0 );
 371                 c = &connections[i];
 372                 break;
 373             }
 374
 375                         sd = AC_SOCKET_INVALID;
 376                         if (connections[i].c_sb != NULL)
 377                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 378
 379             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 380                 assert( sd == AC_SOCKET_INVALID );
 381                 c = &connections[i];
 382                 break;
 383             }
 384
 385             assert( connections[i].c_struct_state == SLAP_C_USED );
 386             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 387             assert( sd != AC_SOCKET_INVALID );
 388         }
 389
 390         if( c == NULL ) {
 391 #ifdef NEW_LOGGING
 392                 LDAP_LOG( CONNECTION, INFO,
 393                            "connection_init: skt %d connection table full "
 394                            "(%d/%d)\n", s, i, dtblsize );
 395 #else
 396                 Debug( LDAP_DEBUG_ANY,
 397                                 "connection_init(%d): connection table full "
 398                                 "(%d/%d)\n", s, i, dtblsize);
 399 #endif
 400             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 401             return -1;
 402         }
 403         }
 404 #endif
 405
 406         assert( c != NULL );
 407
 408         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 409                 c->c_send_ldap_result = slap_send_ldap_result;
 410                 c->c_send_search_entry = slap_send_search_entry;
 411                 c->c_send_search_reference = slap_send_search_reference;
 412                 c->c_send_ldap_extended = slap_send_ldap_extended;
 413 #ifdef LDAP_RES_INTERMEDIATE_RESP
 414                 c->c_send_ldap_intermediate_resp = slap_send_ldap_intermediate_resp;
 415 #endif
 416
 417                 c->c_authmech.bv_val = NULL;
 418                 c->c_authmech.bv_len = 0;
 419                 c->c_dn.bv_val = NULL;
 420                 c->c_dn.bv_len = 0;
 421                 c->c_ndn.bv_val = NULL;
 422                 c->c_ndn.bv_len = 0;
 423                 c->c_groups = NULL;
 424
 425                 c->c_listener = NULL;
 426                 c->c_peer_domain.bv_val = NULL;
 427                 c->c_peer_domain.bv_len = 0;
 428                 c->c_peer_name.bv_val = NULL;
 429                 c->c_peer_name.bv_len = 0;
 430
 431                 LDAP_STAILQ_INIT(&c->c_ops);
 432                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 433
 434                 c->c_sasl_bind_mech.bv_val = NULL;
 435                 c->c_sasl_bind_mech.bv_len = 0;
 436                 c->c_sasl_done = 0;
 437                 c->c_sasl_authctx = NULL;
 438                 c->c_sasl_sockctx = NULL;
 439                 c->c_sasl_extra = NULL;
 440                 c->c_sasl_bindop = NULL;
 441
 442                 c->c_sb = ber_sockbuf_alloc( );
 443
 444                 {
 445                         ber_len_t max = sockbuf_max_incoming;
 446                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 447                 }
 448
 449                 c->c_currentber = NULL;
 450
 451                 /* should check status of thread calls */
 452                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 453                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 454                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 455
 456                 c->c_struct_state = SLAP_C_UNUSED;
 457         }
 458
 459     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 460
 461     assert( c->c_struct_state == SLAP_C_UNUSED );
 462     assert( c->c_authmech.bv_val == NULL );
 463     assert( c->c_dn.bv_val == NULL );
 464     assert( c->c_ndn.bv_val == NULL );
 465     assert( c->c_groups == NULL );
 466     assert( c->c_listener == NULL );
 467     assert( c->c_peer_domain.bv_val == NULL );
 468     assert( c->c_peer_name.bv_val == NULL );
 469     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 470     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 471         assert( c->c_sasl_bind_mech.bv_val == NULL );
 472         assert( c->c_sasl_done == 0 );
 473         assert( c->c_sasl_authctx == NULL );
 474         assert( c->c_sasl_sockctx == NULL );
 475         assert( c->c_sasl_extra == NULL );
 476         assert( c->c_sasl_bindop == NULL );
 477         assert( c->c_currentber == NULL );
 478
 479         c->c_listener = listener;
 480         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 481         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 482
 483     c->c_n_ops_received = 0;
 484     c->c_n_ops_executing = 0;
 485     c->c_n_ops_pending = 0;
 486     c->c_n_ops_completed = 0;
 487
 488         c->c_n_get = 0;
 489         c->c_n_read = 0;
 490         c->c_n_write = 0;
 491
 492         /* set to zero until bind, implies LDAP_VERSION3 */
 493         c->c_protocol = 0;
 494
 495 #ifdef SLAPD_MONITOR
 496         c->c_activitytime = c->c_starttime = slap_get_time();
 497 #else
 498         if( global_idletimeout > 0 ) {
 499                 c->c_activitytime = c->c_starttime = slap_get_time();
 500         }
 501 #endif
 502
 503 #ifdef LDAP_CONNECTIONLESS
 504         c->c_is_udp = 0;
 505         if( tls_udp_option == 2 ) {
 506                 c->c_is_udp = 1;
 507 #ifdef LDAP_DEBUG
 508                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 509                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 510 #endif
 511                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 512                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 513                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 514                         LBER_SBIOD_LEVEL_PROVIDER, NULL );
 515         } else
 516 #endif
 517         {
 518 #ifdef LDAP_DEBUG
 519                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 520                         LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 521 #endif
 522                 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 523                         LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 524         }
 525
 526 #ifdef LDAP_DEBUG
 527         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 528                 INT_MAX, (void*)"ldap_" );
 529 #endif
 530
 531         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 532                 c /* non-NULL */ ) < 0 )
 533         {
 534 #ifdef NEW_LOGGING
 535                 LDAP_LOG( CONNECTION, INFO,
 536                            "connection_init: conn %lu  set nonblocking failed\n",
 537                            c->c_connid, 0, 0 );
 538 #else
 539                 Debug( LDAP_DEBUG_ANY,
 540                         "connection_init(%d, %s): set nonblocking failed\n",
 541                         s, c->c_peer_name.bv_val, 0 );
 542 #endif
 543         }
 544
 545     id = c->c_connid = conn_nextid++;
 546
 547     c->c_conn_state = SLAP_C_INACTIVE;
 548     c->c_struct_state = SLAP_C_USED;
 549
 550         c->c_ssf = c->c_transport_ssf = ssf;
 551         c->c_tls_ssf = 0;
 552
 553 #ifdef HAVE_TLS
 554     if ( tls_udp_option == 1 ) {
 555             c->c_is_tls = 1;
 556             c->c_needs_tls_accept = 1;
 557     } else {
 558             c->c_is_tls = 0;
 559             c->c_needs_tls_accept = 0;
 560     }
 561 #endif
 562
 563         slap_sasl_open( c, 0 );
 564         slap_sasl_external( c, ssf, authid );
 565
 566     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 567     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 568
 569     backend_connection_init(c);
 570
 571     return id;
 572 }
 573
 574 void connection2anonymous( Connection *c )
 575 {
 576         assert( connections != NULL );
 577         assert( c != NULL );
 578
 579         {
 580                 ber_len_t max = sockbuf_max_incoming;
 581                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 582         }
 583
 584         if(c->c_authmech.bv_val != NULL ) {
 585                 free(c->c_authmech.bv_val);
 586                 c->c_authmech.bv_val = NULL;
 587         }
 588         c->c_authmech.bv_len = 0;
 589
 590         if(c->c_dn.bv_val != NULL) {
 591                 free(c->c_dn.bv_val);
 592                 c->c_dn.bv_val = NULL;
 593         }
 594         c->c_dn.bv_len = 0;
 595         if(c->c_ndn.bv_val != NULL) {
 596                 free(c->c_ndn.bv_val);
 597                 c->c_ndn.bv_val = NULL;
 598         }
 599         c->c_ndn.bv_len = 0;
 600
 601         c->c_authz_backend = NULL;
 602
 603         {
 604                 GroupAssertion *g, *n;
 605                 for (g = c->c_groups; g; g=n) {
 606                         n = g->ga_next;
 607                         free(g);
 608                 }
 609                 c->c_groups = NULL;
 610         }
 611 }
 612
 613 static void
 614 connection_destroy( Connection *c )
 615 {
 616         /* note: connections_mutex should be locked by caller */
 617     ber_socket_t        sd;
 618     unsigned long       connid;
 619
 620     assert( connections != NULL );
 621     assert( c != NULL );
 622     assert( c->c_struct_state != SLAP_C_UNUSED );
 623     assert( c->c_conn_state != SLAP_C_INVALID );
 624     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 625
 626     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 627     connid = c->c_connid;
 628
 629     backend_connection_destroy(c);
 630
 631     c->c_protocol = 0;
 632     c->c_connid = -1;
 633
 634     c->c_activitytime = c->c_starttime = 0;
 635
 636         connection2anonymous( c );
 637         c->c_listener = NULL;
 638
 639         if(c->c_peer_domain.bv_val != NULL) {
 640                 free(c->c_peer_domain.bv_val);
 641                 c->c_peer_domain.bv_val = NULL;
 642         }
 643         c->c_peer_domain.bv_len = 0;
 644         if(c->c_peer_name.bv_val != NULL) {
 645                 free(c->c_peer_name.bv_val);
 646                 c->c_peer_name.bv_val = NULL;
 647         }
 648         c->c_peer_name.bv_len = 0;
 649
 650         c->c_sasl_bind_in_progress = 0;
 651         if(c->c_sasl_bind_mech.bv_val != NULL) {
 652                 free(c->c_sasl_bind_mech.bv_val);
 653                 c->c_sasl_bind_mech.bv_val = NULL;
 654         }
 655         c->c_sasl_bind_mech.bv_len = 0;
 656
 657         slap_sasl_close( c );
 658
 659         if ( c->c_currentber != NULL ) {
 660                 ber_free( c->c_currentber, 1 );
 661                 c->c_currentber = NULL;
 662         }
 663
 664         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 665         if ( sd != AC_SOCKET_INVALID ) {
 666                 slapd_remove( sd, 0 );
 667
 668                 Statslog( LDAP_DEBUG_STATS,
 669                     "conn=%lu fd=%ld closed\n",
 670                         connid, (long) sd, 0, 0, 0 );
 671         }
 672
 673         ber_sockbuf_free( c->c_sb );
 674
 675         c->c_sb = ber_sockbuf_alloc( );
 676
 677         {
 678                 ber_len_t max = sockbuf_max_incoming;
 679                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 680         }
 681
 682     c->c_conn_state = SLAP_C_INVALID;
 683     c->c_struct_state = SLAP_C_UNUSED;
 684 }
 685
 686 int connection_state_closing( Connection *c )
 687 {
 688         /* c_mutex must be locked by caller */
 689
 690         int state;
 691         assert( c != NULL );
 692         assert( c->c_struct_state == SLAP_C_USED );
 693
 694         state = c->c_conn_state;
 695
 696         assert( state != SLAP_C_INVALID );
 697
 698         return state == SLAP_C_CLOSING;
 699 }
 700
 701 static void connection_abandon( Connection *c )
 702 {
 703         /* c_mutex must be locked by caller */
 704
 705         Operation *o;
 706
 707         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 708                 o->o_abandon = 1;
 709         }
 710
 711         /* remove pending operations */
 712         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 713                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 714                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 715                 slap_op_free( o );
 716         }
 717 }
 718
 719 void connection_closing( Connection *c )
 720 {
 721         assert( connections != NULL );
 722         assert( c != NULL );
 723         assert( c->c_struct_state == SLAP_C_USED );
 724         assert( c->c_conn_state != SLAP_C_INVALID );
 725
 726         /* c_mutex must be locked by caller */
 727
 728         if( c->c_conn_state != SLAP_C_CLOSING ) {
 729                 ber_socket_t    sd;
 730
 731                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 732 #ifdef NEW_LOGGING
 733                 LDAP_LOG( CONNECTION, DETAIL1,
 734                            "connection_closing: conn %lu readying socket %d for close.\n",
 735                            c->c_connid, sd, 0 );
 736 #else
 737                 Debug( LDAP_DEBUG_TRACE,
 738                         "connection_closing: readying conn=%lu sd=%d for close\n",
 739                         c->c_connid, sd, 0 );
 740 #endif
 741                 /* update state to closing */
 742                 c->c_conn_state = SLAP_C_CLOSING;
 743
 744                 /* don't listen on this port anymore */
 745                 slapd_clr_read( sd, 1 );
 746
 747                 /* abandon active operations */
 748                 connection_abandon( c );
 749
 750                 /* wake write blocked operations */
 751                 slapd_clr_write( sd, 1 );
 752                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 753         }
 754 }
 755
 756 static void connection_close( Connection *c )
 757 {
 758         ber_socket_t    sd;
 759
 760         assert( connections != NULL );
 761         assert( c != NULL );
 762         assert( c->c_struct_state == SLAP_C_USED );
 763         assert( c->c_conn_state == SLAP_C_CLOSING );
 764
 765         /* note: connections_mutex and c_mutex should be locked by caller */
 766
 767         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 768         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 769 #ifdef NEW_LOGGING
 770                 LDAP_LOG( CONNECTION, DETAIL1,
 771                            "connection_close: conn %lu  deferring sd %d\n",
 772                            c->c_connid, sd, 0 );
 773 #else
 774                 Debug( LDAP_DEBUG_TRACE,
 775                         "connection_close: deferring conn=%lu sd=%d\n",
 776                         c->c_connid, sd, 0 );
 777 #endif
 778                 return;
 779         }
 780
 781 #ifdef NEW_LOGGING
 782         LDAP_LOG( CONNECTION, RESULTS,
 783                    "connection_close: conn %lu  sd %d\n", c->c_connid, sd, 0 );
 784 #else
 785         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 786                 c->c_connid, sd, 0 );
 787 #endif
 788         connection_destroy( c );
 789 }
 790
 791 unsigned long connections_nextid(void)
 792 {
 793         unsigned long id;
 794         assert( connections != NULL );
 795
 796         ldap_pvt_thread_mutex_lock( &connections_mutex );
 797
 798         id = conn_nextid;
 799
 800         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 801
 802         return id;
 803 }
 804
 805 Connection* connection_first( ber_socket_t *index )
 806 {
 807         assert( connections != NULL );
 808         assert( index != NULL );
 809
 810         ldap_pvt_thread_mutex_lock( &connections_mutex );
 811
 812         *index = 0;
 813
 814         return connection_next(NULL, index);
 815 }
 816
 817 Connection* connection_next( Connection *c, ber_socket_t *index )
 818 {
 819         assert( connections != NULL );
 820         assert( index != NULL );
 821         assert( *index <= dtblsize );
 822
 823         if( c != NULL ) {
 824                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 825         }
 826
 827         c = NULL;
 828
 829         for(; *index < dtblsize; (*index)++) {
 830                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 831                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 832 #ifndef HAVE_WINSOCK
 833                         continue;
 834 #else
 835                         break;
 836 #endif
 837                 }
 838
 839                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 840                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 841                         c = &connections[(*index)++];
 842                         break;
 843                 }
 844
 845                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 846                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 847         }
 848
 849         if( c != NULL ) {
 850                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 851         }
 852
 853         return c;
 854 }
 855
 856 void connection_done( Connection *c )
 857 {
 858         assert( connections != NULL );
 859
 860         if( c != NULL ) {
 861                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 862         }
 863
 864         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 865 }
 866
 867 /*
 868  * connection_activity - handle the request operation op on connection
 869  * conn.  This routine figures out what kind of operation it is and
 870  * calls the appropriate stub to handle it.
 871  */
 872
 873 #ifdef SLAPD_MONITOR
 874 #define INCR_OP(var,index) \
 875         do { \
 876                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 877                 (var)[(index)]++; \
 878                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 879         } while (0)
 880 #else /* !SLAPD_MONITOR */
 881 #define INCR_OP(var,index)
 882 #endif /* !SLAPD_MONITOR */
 883
 884 static void *
 885 connection_operation( void *ctx, void *arg_v )
 886 {
 887         int rc = SLAPD_DISCONNECT;
 888         Operation *op = arg_v;
 889         SlapReply rs = {REP_RESULT};
 890         ber_tag_t tag = op->o_tag;
 891 #ifdef SLAPD_MONITOR
 892         ber_tag_t oldtag = tag;
 893 #endif /* SLAPD_MONITOR */
 894         Connection *conn = op->o_conn;
 895         void *memctx = NULL;
 896         ber_len_t memsiz;
 897
 898         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 899         num_ops_initiated++;
 900         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 901
 902         op->o_threadctx = ctx;
 903
 904         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 905 #ifdef NEW_LOGGING
 906                 LDAP_LOG( CONNECTION, ERR,
 907                         "connection_operation: conn %lu SASL bind in progress (tag=%ld).\n",
 908                         conn->c_connid, (long)tag, 0 );
 909 #else
 910                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 911                         "error: SASL bind in progress (tag=%ld).\n",
 912                         (long) tag, 0, 0 );
 913 #endif
 914                 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
 915                         "SASL bind in progress" );
 916                 goto operations_error;
 917         }
 918
 919         /* We can use Thread-Local storage for most mallocs. We can
 920          * also use TL for ber parsing, but not on Add or Modify.
 921          */
 922 #define SLAB_SIZE       1048576
 923 #if 0
 924         memsiz = ber_len( op->o_ber ) * 64;
 925         if ( SLAB_SIZE > memsiz ) memsiz = SLAB_SIZE;
 926 #endif
 927         memsiz = SLAB_SIZE;
 928
 929         memctx = sl_mem_create( memsiz, ctx );
 930         op->o_tmpmemctx = memctx;
 931         op->o_tmpmfuncs = &sl_mfuncs;
 932         if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
 933                 /* Note - the ber and its buffer are already allocated from
 934                  * regular memory; this only affects subsequent mallocs that
 935                  * ber_scanf may invoke.
 936                  */
 937                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
 938         }
 939
 940         switch ( tag ) {
 941         case LDAP_REQ_BIND:
 942                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 943                 rc = do_bind( op, &rs );
 944                 break;
 945
 946         case LDAP_REQ_UNBIND:
 947                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 948                 rc = do_unbind( op, &rs );
 949                 break;
 950
 951         case LDAP_REQ_ADD:
 952                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 953                 rc = do_add( op, &rs );
 954                 break;
 955
 956         case LDAP_REQ_DELETE:
 957                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 958                 rc = do_delete( op, &rs );
 959                 break;
 960
 961         case LDAP_REQ_MODRDN:
 962                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 963                 rc = do_modrdn( op, &rs );
 964                 break;
 965
 966         case LDAP_REQ_MODIFY:
 967                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 968                 rc = do_modify( op, &rs );
 969                 break;
 970
 971         case LDAP_REQ_COMPARE:
 972                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 973                 rc = do_compare( op, &rs );
 974                 break;
 975
 976         case LDAP_REQ_SEARCH:
 977                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 978                 rc = do_search( op, &rs );
 979                 break;
 980
 981         case LDAP_REQ_ABANDON:
 982                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 983                 rc = do_abandon( op, &rs );
 984                 break;
 985
 986         case LDAP_REQ_EXTENDED:
 987                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 988                 rc = do_extended( op, &rs );
 989                 break;
 990
 991         default:
 992 #ifdef NEW_LOGGING
 993                 LDAP_LOG( CONNECTION, INFO,
 994                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 995                            conn->c_connid, tag, 0  );
 996 #else
 997                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 998                     tag, 0, 0 );
 999 #endif
1000                 op->o_tag = LBER_ERROR;
1001                 rs.sr_err = LDAP_PROTOCOL_ERROR;
1002                 rs.sr_text = "unknown LDAP request";
1003                 send_ldap_disconnect( op, &rs );
1004                 rc = -1;
1005                 break;
1006         }
1007
1008 #ifdef SLAPD_MONITOR
1009         oldtag = tag;
1010 #endif /* SLAPD_MONITOR */
1011         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1012
1013 operations_error:
1014         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1015         num_ops_completed++;
1016 #ifdef SLAPD_MONITOR
1017         switch (oldtag) {
1018         case LDAP_REQ_BIND:
1019                 num_ops_completed_[SLAP_OP_BIND]++;
1020                 break;
1021         case LDAP_REQ_UNBIND:
1022                 num_ops_completed_[SLAP_OP_UNBIND]++;
1023                 break;
1024         case LDAP_REQ_ADD:
1025                 num_ops_completed_[SLAP_OP_ADD]++;
1026                 break;
1027         case LDAP_REQ_DELETE:
1028                 num_ops_completed_[SLAP_OP_DELETE]++;
1029                 break;
1030         case LDAP_REQ_MODRDN:
1031                 num_ops_completed_[SLAP_OP_MODRDN]++;
1032                 break;
1033         case LDAP_REQ_MODIFY:
1034                 num_ops_completed_[SLAP_OP_MODIFY]++;
1035                 break;
1036         case LDAP_REQ_COMPARE:
1037                 num_ops_completed_[SLAP_OP_COMPARE]++;
1038                 break;
1039         case LDAP_REQ_SEARCH:
1040                 num_ops_completed_[SLAP_OP_SEARCH]++;
1041                 break;
1042         case LDAP_REQ_ABANDON:
1043                 num_ops_completed_[SLAP_OP_ABANDON]++;
1044                 break;
1045         case LDAP_REQ_EXTENDED:
1046                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1047                 break;
1048         }
1049 #endif /* SLAPD_MONITOR */
1050         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1051
1052 #ifdef LDAP_EXOP_X_CANCEL
1053         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1054                 op->o_cancel = LDAP_TOO_LATE;
1055         }
1056
1057         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1058                 op->o_cancel != SLAP_CANCEL_DONE )
1059         {
1060                 ldap_pvt_thread_yield();
1061         }
1062 #endif
1063
1064         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1065
1066         conn->c_n_ops_executing--;
1067         conn->c_n_ops_completed++;
1068
1069         LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1070         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1071
1072 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
1073         if ( op->o_cancel == SLAP_CANCEL_ACK )
1074                 goto co_op_free;
1075 #endif
1076 #ifdef LDAP_CLIENT_UPDATE
1077         if ( ( op->o_clientupdate_type & SLAP_LCUP_PERSIST ) ) {
1078                 sl_mem_detach( ctx, memctx );
1079                 goto no_co_op_free;
1080         }
1081 #endif
1082 #ifdef LDAP_SYNC
1083         if ( ( op->o_sync_mode & SLAP_SYNC_PERSIST ) ) {
1084                 sl_mem_detach( ctx, memctx );
1085                 goto no_co_op_free;
1086         }
1087 #endif
1088
1089 co_op_free:
1090
1091         memctx = NULL;
1092         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1093         slap_op_free( op );
1094
1095 no_co_op_free:
1096
1097         switch( tag ) {
1098         case LBER_ERROR:
1099         case LDAP_REQ_UNBIND:
1100                 /* c_mutex is locked */
1101                 connection_closing( conn );
1102                 break;
1103
1104         case LDAP_REQ_BIND:
1105                 conn->c_sasl_bind_in_progress =
1106                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1107
1108                 if( conn->c_conn_state == SLAP_C_BINDING) {
1109                         conn->c_conn_state = SLAP_C_ACTIVE;
1110                 }
1111         }
1112
1113         connection_resched( conn );
1114
1115         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1116
1117         return NULL;
1118 }
1119
1120 int connection_read(ber_socket_t s)
1121 {
1122         int rc = 0;
1123         Connection *c;
1124
1125         assert( connections != NULL );
1126
1127         ldap_pvt_thread_mutex_lock( &connections_mutex );
1128
1129         /* get (locked) connection */
1130         c = connection_get( s );
1131
1132         if( c == NULL ) {
1133 #ifdef NEW_LOGGING
1134                 LDAP_LOG( CONNECTION, INFO,
1135                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1136 #else
1137                 Debug( LDAP_DEBUG_ANY,
1138                         "connection_read(%ld): no connection!\n",
1139                         (long) s, 0, 0 );
1140 #endif
1141                 slapd_remove(s, 0);
1142
1143                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1144                 return -1;
1145         }
1146
1147         c->c_n_read++;
1148
1149         if( c->c_conn_state == SLAP_C_CLOSING ) {
1150 #ifdef NEW_LOGGING
1151                 LDAP_LOG( CONNECTION, INFO,
1152                         "connection_read: conn %lu connection closing, ignoring input\n",
1153                         c->c_connid, 0, 0 );
1154 #else
1155                 Debug( LDAP_DEBUG_TRACE,
1156                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1157                         s, c->c_connid, 0 );
1158 #endif
1159                 connection_return( c );
1160                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1161                 return 0;
1162         }
1163
1164 #ifdef NEW_LOGGING
1165         LDAP_LOG( CONNECTION, DETAIL1,
1166                    "connection_read: conn %lu  checking for input.\n",
1167                    c->c_connid, 0, 0  );
1168 #else
1169         Debug( LDAP_DEBUG_TRACE,
1170                 "connection_read(%d): checking for input on id=%lu\n",
1171                 s, c->c_connid, 0 );
1172 #endif
1173
1174 #ifdef HAVE_TLS
1175         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1176                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1177                 if ( rc < 0 ) {
1178 #if 0 /* required by next #if 0 */
1179                         struct timeval tv;
1180                         fd_set rfd;
1181 #endif
1182
1183 #ifdef NEW_LOGGING
1184                         LDAP_LOG( CONNECTION, ERR,
1185                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1186                                    c->c_connid, rc, 0 );
1187 #else
1188                         Debug( LDAP_DEBUG_TRACE,
1189                                 "connection_read(%d): TLS accept error "
1190                                 "error=%d id=%lu, closing\n",
1191                                 s, rc, c->c_connid );
1192 #endif
1193                         c->c_needs_tls_accept = 0;
1194                         /* connections_mutex and c_mutex are locked */
1195                         connection_closing( c );
1196
1197 #if 0
1198                         /* Drain input before close, to allow SSL error codes
1199                          * to propagate to client. */
1200                         FD_ZERO(&rfd);
1201                         FD_SET(s, &rfd);
1202                         for (rc=1; rc>0;) {
1203                             tv.tv_sec = 1;
1204                             tv.tv_usec = 0;
1205                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1206                             if (rc == 1) {
1207                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1208                                 }
1209                         }
1210 #endif
1211                         connection_close( c );
1212
1213                 } else if ( rc == 0 ) {
1214                         void *ssl;
1215                         struct berval authid = { 0, NULL };
1216
1217                         c->c_needs_tls_accept = 0;
1218
1219                         /* we need to let SASL know */
1220                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1221
1222                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1223                         if( c->c_tls_ssf > c->c_ssf ) {
1224                                 c->c_ssf = c->c_tls_ssf;
1225                         }
1226
1227                         rc = dnX509peerNormalize( ssl, &authid );
1228                         if ( rc != LDAP_SUCCESS ) {
1229 #ifdef NEW_LOGGING
1230                                 LDAP_LOG( CONNECTION, INFO,
1231                                         "connection_read: conn %lu unable to get TLS client DN, "
1232                                         "error %d\n", c->c_connid, rc, 0 );
1233 #else
1234                                 Debug( LDAP_DEBUG_TRACE,
1235                                 "connection_read(%d): unable to get TLS client DN "
1236                                 "error=%d id=%lu\n",
1237                                 s, rc, c->c_connid );
1238 #endif
1239                         }
1240                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1241                         if ( authid.bv_val )    free( authid.bv_val );
1242                 }
1243
1244                 /* if success and data is ready, fall thru to data input loop */
1245                 if( rc != 0 ||
1246                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1247                 {
1248                         connection_return( c );
1249                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1250                         return 0;
1251                 }
1252         }
1253 #endif
1254
1255 #ifdef HAVE_CYRUS_SASL
1256         if ( c->c_sasl_layers ) {
1257                 /* If previous layer is not removed yet, give up for now */
1258                 if ( !c->c_sasl_sockctx ) {
1259                         connection_return( c );
1260                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1261                         return 0;
1262                 }
1263
1264                 c->c_sasl_layers = 0;
1265
1266                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_sockctx );
1267
1268                 if( rc != LDAP_SUCCESS ) {
1269 #ifdef NEW_LOGGING
1270                         LDAP_LOG( CONNECTION, ERR,
1271                                 "connection_read: conn %lu SASL install error %d, closing\n",
1272                                 c->c_connid, rc, 0 );
1273 #else
1274                         Debug( LDAP_DEBUG_TRACE,
1275                                 "connection_read(%d): SASL install error "
1276                                 "error=%d id=%lu, closing\n",
1277                                 s, rc, c->c_connid );
1278 #endif
1279                         /* connections_mutex and c_mutex are locked */
1280                         connection_closing( c );
1281                         connection_close( c );
1282                         connection_return( c );
1283                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1284                         return 0;
1285                 }
1286         }
1287 #endif
1288
1289 #define CONNECTION_INPUT_LOOP 1
1290 /* #define      DATA_READY_LOOP 1 */
1291
1292         do
1293         {
1294                 /* How do we do this without getting into a busy loop ? */
1295                 rc = connection_input( c );
1296         }
1297 #ifdef DATA_READY_LOOP
1298         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1299 #elif CONNECTION_INPUT_LOOP
1300         while(!rc);
1301 #else
1302         while(0);
1303 #endif
1304
1305         if( rc < 0 ) {
1306 #ifdef NEW_LOGGING
1307                 LDAP_LOG( CONNECTION, ERR,
1308                         "connection_read: conn %lu  input error %d, closing.\n",
1309                         c->c_connid, rc, 0 );
1310 #else
1311                 Debug( LDAP_DEBUG_TRACE,
1312                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1313                         s, rc, c->c_connid );
1314 #endif
1315                 /* connections_mutex and c_mutex are locked */
1316                 connection_closing( c );
1317                 connection_close( c );
1318                 connection_return( c );
1319                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1320                 return 0;
1321         }
1322
1323         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1324                 slapd_set_read( s, 1 );
1325         }
1326
1327         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1328                 slapd_set_write( s, 1 );
1329         }
1330
1331         connection_return( c );
1332         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1333         return 0;
1334 }
1335
1336 static int
1337 connection_input(
1338     Connection *conn
1339 )
1340 {
1341         Operation *op;
1342         ber_tag_t       tag;
1343         ber_len_t       len;
1344         ber_int_t       msgid;
1345         BerElement      *ber;
1346         int             rc;
1347 #ifdef LDAP_CONNECTIONLESS
1348         Sockaddr        peeraddr;
1349         char            *cdn = NULL;
1350 #endif
1351
1352         if ( conn->c_currentber == NULL &&
1353                 ( conn->c_currentber = ber_alloc()) == NULL )
1354         {
1355 #ifdef NEW_LOGGING
1356                 LDAP_LOG( CONNECTION, ERR,
1357                         "connection_input: conn %lu  ber_alloc failed.\n",
1358                         conn->c_connid, 0, 0 );
1359 #else
1360                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1361 #endif
1362                 return -1;
1363         }
1364
1365         errno = 0;
1366
1367 #ifdef LDAP_CONNECTIONLESS
1368         if ( conn->c_is_udp ) {
1369                 char    peername[sizeof("IP=255.255.255.255:65336")];
1370                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1371                         sizeof(struct sockaddr));
1372                 if (len != sizeof(struct sockaddr))
1373                         return 1;
1374                 sprintf( peername, "IP=%s:%d",
1375                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1376                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1377                 Statslog( LDAP_DEBUG_STATS,
1378                         "conn=%lu UDP request from %s (%s) accepted.\n",
1379                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1380         }
1381 #endif
1382         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1383         if ( tag != LDAP_TAG_MESSAGE ) {
1384                 int err = errno;
1385                 ber_socket_t    sd;
1386
1387                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1388
1389 #ifdef NEW_LOGGING
1390                 LDAP_LOG( CONNECTION, ERR,
1391                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1392                         conn->c_connid, err, sock_errstr(err) );
1393 #else
1394                 Debug( LDAP_DEBUG_TRACE,
1395                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1396                         sd, err, sock_errstr(err) );
1397 #endif
1398                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1399                         /* log, close and send error */
1400                         ber_free( conn->c_currentber, 1 );
1401                         conn->c_currentber = NULL;
1402
1403                         return -2;
1404                 }
1405                 return 1;
1406         }
1407
1408         ber = conn->c_currentber;
1409         conn->c_currentber = NULL;
1410
1411         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1412                 /* log, close and send error */
1413 #ifdef NEW_LOGGING
1414                 LDAP_LOG( CONNECTION, ERR,
1415                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1416                         conn->c_connid, tag, 0 );
1417 #else
1418                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1419                     0 );
1420 #endif
1421                 ber_free( ber, 1 );
1422                 return -1;
1423         }
1424
1425         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1426                 /* log, close and send error */
1427 #ifdef NEW_LOGGING
1428                 LDAP_LOG( CONNECTION, ERR,
1429                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1430                            conn->c_connid, tag, 0 );
1431 #else
1432                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1433                     0 );
1434 #endif
1435                 ber_free( ber, 1 );
1436
1437                 return -1;
1438         }
1439
1440 #ifdef LDAP_CONNECTIONLESS
1441         if( conn->c_is_udp ) {
1442                 if( tag == LBER_OCTETSTRING ) {
1443                         ber_get_stringa( ber, &cdn );
1444                         tag = ber_peek_tag(ber, &len);
1445                 }
1446                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1447 #ifdef NEW_LOGGING
1448                     LDAP_LOG( CONNECTION, ERR,
1449                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1450                                conn->c_connid, tag, 0 );
1451 #else
1452                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1453                         0 );
1454 #endif
1455                     ber_free( ber, 1 );
1456                     return 0;
1457                 }
1458         }
1459 #endif
1460         if(tag == LDAP_REQ_BIND) {
1461                 /* immediately abandon all exiting operations upon BIND */
1462                 connection_abandon( conn );
1463         }
1464
1465         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1466
1467         op->o_conn = conn;
1468         op->vrFilter = NULL;
1469 #ifdef LDAP_CONTROL_PAGEDRESULTS
1470         op->o_pagedresults_state = conn->c_pagedresults_state;
1471 #endif
1472 #ifdef LDAP_CONNECTIONLESS
1473         if (conn->c_is_udp) {
1474
1475                 if ( cdn ) {
1476                     ber_str2bv( cdn, 0, 1, &op->o_dn );
1477                     op->o_protocol = LDAP_VERSION2;
1478                 }
1479                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1480                 if (op->o_res_ber == NULL)
1481                         return 1;
1482
1483                 rc = ber_write(op->o_res_ber, (char *)&peeraddr, sizeof(struct sockaddr), 0);
1484                 if (rc != sizeof(struct sockaddr)) {
1485 #ifdef NEW_LOGGING
1486                         LDAP_LOG( CONNECTION, INFO,
1487                                 "connection_input: conn %lu  ber_write failed\n",
1488                                 conn->c_connid, 0, 0 );
1489 #else
1490                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1491 #endif
1492                         return 1;
1493                 }
1494
1495                 if (op->o_protocol == LDAP_VERSION2) {
1496                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1497                         if (rc == -1) {
1498 #ifdef NEW_LOGGING
1499                                 LDAP_LOG( CONNECTION, INFO,
1500                                         "connection_input: conn %lu  put outer sequence failed\n",
1501                                         conn->c_connid, 0, 0 );
1502 #else
1503                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1504 #endif
1505                                 return rc;
1506                         }
1507                 }
1508         }
1509 #endif /* LDAP_CONNECTIONLESS */
1510
1511         rc = 0;
1512
1513         /* Don't process requests when the conn is in the middle of a
1514          * Bind, or if it's closing. Also, don't let any single conn
1515          * use up all the available threads, and don't execute if we're
1516          * currently blocked on output. And don't execute if there are
1517          * already pending ops, let them go first.
1518          */
1519         if ( conn->c_conn_state == SLAP_C_BINDING
1520                 || conn->c_conn_state == SLAP_C_CLOSING
1521                 || conn->c_n_ops_executing >= connection_pool_max/2
1522                 || conn->c_n_ops_pending
1523                 || conn->c_writewaiter)
1524         {
1525                 int max = conn->c_dn.bv_len ? slap_conn_max_pending_auth
1526                          : slap_conn_max_pending;
1527 #ifdef NEW_LOGGING
1528                 LDAP_LOG( CONNECTION, INFO,
1529                         "connection_input: conn %lu  deferring operation\n",
1530                         conn->c_connid, 0, 0 );
1531 #else
1532                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1533 #endif
1534                 conn->c_n_ops_pending++;
1535                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1536                 if ( conn->c_n_ops_pending > max ) {
1537                         rc = -1;
1538                 } else {
1539                         rc = 1;
1540                 }
1541         } else {
1542                 conn->c_n_ops_executing++;
1543                 connection_op_activate( op );
1544         }
1545
1546 #ifdef NO_THREADS
1547         if ( conn->c_struct_state != SLAP_C_USED ) {
1548                 /* connection must have got closed underneath us */
1549                 return 1;
1550         }
1551 #endif
1552         assert( conn->c_struct_state == SLAP_C_USED );
1553
1554         return rc;
1555 }
1556
1557 static int
1558 connection_resched( Connection *conn )
1559 {
1560         Operation *op;
1561
1562         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1563                 int rc;
1564                 ber_socket_t    sd;
1565                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1566
1567                 /* us trylock to avoid possible deadlock */
1568                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1569
1570                 if( rc ) {
1571 #ifdef NEW_LOGGING
1572                         LDAP_LOG( CONNECTION, DETAIL1,
1573                                 "connection_resched: conn %lu  reaquiring locks.\n",
1574                                 conn->c_connid, 0, 0 );
1575 #else
1576                         Debug( LDAP_DEBUG_TRACE,
1577                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1578                                 conn->c_connid, sd, 0 );
1579 #endif
1580                         /*
1581                          * reaquire locks in the right order...
1582                          * this may allow another thread to close this connection,
1583                          * so recheck state below.
1584                          */
1585                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1586                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1587                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1588                 }
1589
1590                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1591 #ifdef NEW_LOGGING
1592                         LDAP_LOG( CONNECTION, INFO,
1593                                 "connection_resched: conn %lu  closed by other thread.\n",
1594                                 conn->c_connid, 0, 0 );
1595 #else
1596                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1597                                 "closed by other thread conn=%lu sd=%d\n",
1598                                 conn->c_connid, sd, 0 );
1599 #endif
1600                 } else {
1601 #ifdef NEW_LOGGING
1602                         LDAP_LOG( CONNECTION, DETAIL1,
1603                                 "connection_resched: conn %lu  attempting closing.\n",
1604                                 conn->c_connid, 0, 0 );
1605 #else
1606                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1607                                 "attempting closing conn=%lu sd=%d\n",
1608                                 conn->c_connid, sd, 0 );
1609 #endif
1610                         connection_close( conn );
1611                 }
1612
1613                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1614                 return 0;
1615         }
1616
1617         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1618                 /* other states need different handling */
1619                 return 0;
1620         }
1621
1622         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1623                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1624                         break;
1625                 }
1626                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1627                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1628                 /* pending operations should not be marked for abandonment */
1629                 assert(!op->o_abandon);
1630
1631                 conn->c_n_ops_pending--;
1632                 conn->c_n_ops_executing++;
1633
1634                 connection_op_activate( op );
1635
1636                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1637                         break;
1638                 }
1639         }
1640         return 0;
1641 }
1642
1643 static int connection_op_activate( Operation *op )
1644 {
1645         int status;
1646         ber_tag_t tag = op->o_tag;
1647
1648         if(tag == LDAP_REQ_BIND) {
1649                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1650         }
1651
1652         if (!op->o_dn.bv_len) {
1653             op->o_authz = op->o_conn->c_authz;
1654             ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1655             ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1656         }
1657         op->o_authtype = op->o_conn->c_authtype;
1658         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1659
1660         if (!op->o_protocol) {
1661             op->o_protocol = op->o_conn->c_protocol
1662                 ? op->o_conn->c_protocol : LDAP_VERSION3;
1663         }
1664         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1665                 && op->o_protocol > LDAP_VERSION2) {
1666                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1667         }
1668
1669         op->o_connid = op->o_conn->c_connid;
1670
1671         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1672
1673         status = ldap_pvt_thread_pool_submit( &connection_pool,
1674                 connection_operation, (void *) op );
1675
1676         if ( status != 0 ) {
1677 #ifdef NEW_LOGGING
1678                 LDAP_LOG( CONNECTION, ERR,
1679                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1680                         op->o_connid, 0, 0 );
1681 #else
1682                 Debug( LDAP_DEBUG_ANY,
1683                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1684 #endif
1685                 /* should move op to pending list */
1686         }
1687
1688         return status;
1689 }
1690
1691 int connection_write(ber_socket_t s)
1692 {
1693         Connection *c;
1694
1695         assert( connections != NULL );
1696
1697         ldap_pvt_thread_mutex_lock( &connections_mutex );
1698
1699         c = connection_get( s );
1700
1701         slapd_clr_write( s, 0);
1702
1703         if( c == NULL ) {
1704 #ifdef NEW_LOGGING
1705                 LDAP_LOG( CONNECTION, ERR,
1706                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1707 #else
1708                 Debug( LDAP_DEBUG_ANY,
1709                         "connection_write(%ld): no connection!\n",
1710                         (long) s, 0, 0 );
1711 #endif
1712                 slapd_remove(s, 0);
1713                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1714                 return -1;
1715         }
1716
1717         c->c_n_write++;
1718
1719 #ifdef NEW_LOGGING
1720         LDAP_LOG( CONNECTION, DETAIL1,
1721                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1722 #else
1723         Debug( LDAP_DEBUG_TRACE,
1724                 "connection_write(%d): waking output for id=%lu\n",
1725                 s, c->c_connid, 0 );
1726 #endif
1727         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1728
1729         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1730                 slapd_set_read( s, 1 );
1731         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1732                 slapd_set_write( s, 1 );
1733         connection_return( c );
1734         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1735         return 0;
1736 }
1737