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

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