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=%d closed\n",
 670                         connid, 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;
 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                 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, memctx );
 934         }
 935
 936         switch ( tag ) {
 937         case LDAP_REQ_BIND:
 938                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 939                 rc = do_bind( op, &rs );
 940                 break;
 941
 942         case LDAP_REQ_UNBIND:
 943                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 944                 rc = do_unbind( op, &rs );
 945                 break;
 946
 947         case LDAP_REQ_ADD:
 948                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 949                 rc = do_add( op, &rs );
 950                 break;
 951
 952         case LDAP_REQ_DELETE:
 953                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 954                 rc = do_delete( op, &rs );
 955                 break;
 956
 957         case LDAP_REQ_MODRDN:
 958                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 959                 rc = do_modrdn( op, &rs );
 960                 break;
 961
 962         case LDAP_REQ_MODIFY:
 963                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 964                 rc = do_modify( op, &rs );
 965                 break;
 966
 967         case LDAP_REQ_COMPARE:
 968                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 969                 rc = do_compare( op, &rs );
 970                 break;
 971
 972         case LDAP_REQ_SEARCH:
 973                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 974                 rc = do_search( op, &rs );
 975                 break;
 976
 977         case LDAP_REQ_ABANDON:
 978                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 979                 rc = do_abandon( op, &rs );
 980                 break;
 981
 982         case LDAP_REQ_EXTENDED:
 983                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 984                 rc = do_extended( op, &rs );
 985                 break;
 986
 987         default:
 988 #ifdef NEW_LOGGING
 989                 LDAP_LOG( CONNECTION, INFO,
 990                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 991                            conn->c_connid, tag, 0  );
 992 #else
 993                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 994                     tag, 0, 0 );
 995 #endif
 996                 op->o_tag = LBER_ERROR;
 997                 rs.sr_err = LDAP_PROTOCOL_ERROR;
 998                 rs.sr_text = "unknown LDAP request";
 999                 send_ldap_disconnect( op, &rs );
1000                 rc = -1;
1001                 break;
1002         }
1003
1004 #ifdef SLAPD_MONITOR
1005         oldtag = tag;
1006 #endif /* SLAPD_MONITOR */
1007         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1008
1009 operations_error:
1010         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1011         num_ops_completed++;
1012 #ifdef SLAPD_MONITOR
1013         switch (oldtag) {
1014         case LDAP_REQ_BIND:
1015                 num_ops_completed_[SLAP_OP_BIND]++;
1016                 break;
1017         case LDAP_REQ_UNBIND:
1018                 num_ops_completed_[SLAP_OP_UNBIND]++;
1019                 break;
1020         case LDAP_REQ_ADD:
1021                 num_ops_completed_[SLAP_OP_ADD]++;
1022                 break;
1023         case LDAP_REQ_DELETE:
1024                 num_ops_completed_[SLAP_OP_DELETE]++;
1025                 break;
1026         case LDAP_REQ_MODRDN:
1027                 num_ops_completed_[SLAP_OP_MODRDN]++;
1028                 break;
1029         case LDAP_REQ_MODIFY:
1030                 num_ops_completed_[SLAP_OP_MODIFY]++;
1031                 break;
1032         case LDAP_REQ_COMPARE:
1033                 num_ops_completed_[SLAP_OP_COMPARE]++;
1034                 break;
1035         case LDAP_REQ_SEARCH:
1036                 num_ops_completed_[SLAP_OP_SEARCH]++;
1037                 break;
1038         case LDAP_REQ_ABANDON:
1039                 num_ops_completed_[SLAP_OP_ABANDON]++;
1040                 break;
1041         case LDAP_REQ_EXTENDED:
1042                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1043                 break;
1044         }
1045 #endif /* SLAPD_MONITOR */
1046         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1047
1048 #ifdef LDAP_EXOP_X_CANCEL
1049         if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1050                 op->o_cancel = LDAP_TOO_LATE;
1051         }
1052
1053         while ( op->o_cancel != SLAP_CANCEL_NONE &&
1054                 op->o_cancel != SLAP_CANCEL_DONE )
1055         {
1056                 ldap_pvt_thread_yield();
1057         }
1058 #endif
1059
1060         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1061
1062         conn->c_n_ops_executing--;
1063         conn->c_n_ops_completed++;
1064
1065         LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1066         LDAP_STAILQ_NEXT(op, o_next) = NULL;
1067
1068 #if defined(LDAP_CLIENT_UPDATE) || defined(LDAP_SYNC)
1069         if ( op->o_cancel == SLAP_CANCEL_ACK )
1070                 goto co_op_free;
1071 #endif
1072 #ifdef LDAP_CLIENT_UPDATE
1073         if ( ( op->o_clientupdate_type & SLAP_LCUP_PERSIST ) )
1074                 goto no_co_op_free;
1075 #endif
1076 #ifdef LDAP_SYNC
1077         if ( ( op->o_sync_mode & SLAP_SYNC_PERSIST ) )
1078                 goto no_co_op_free;
1079 #endif
1080
1081 co_op_free:
1082
1083         ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, NULL );
1084         slap_op_free( op );
1085
1086 no_co_op_free:
1087
1088         switch( tag ) {
1089         case LBER_ERROR:
1090         case LDAP_REQ_UNBIND:
1091                 /* c_mutex is locked */
1092                 connection_closing( conn );
1093                 break;
1094
1095         case LDAP_REQ_BIND:
1096                 conn->c_sasl_bind_in_progress =
1097                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1098
1099                 if( conn->c_conn_state == SLAP_C_BINDING) {
1100                         conn->c_conn_state = SLAP_C_ACTIVE;
1101                 }
1102         }
1103
1104         connection_resched( conn );
1105
1106         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1107
1108         return NULL;
1109 }
1110
1111 int connection_read(ber_socket_t s)
1112 {
1113         int rc = 0;
1114         Connection *c;
1115
1116         assert( connections != NULL );
1117
1118         ldap_pvt_thread_mutex_lock( &connections_mutex );
1119
1120         /* get (locked) connection */
1121         c = connection_get( s );
1122
1123         if( c == NULL ) {
1124 #ifdef NEW_LOGGING
1125                 LDAP_LOG( CONNECTION, INFO,
1126                         "connection_read: sock %ld no connection\n", (long)s, 0, 0 );
1127 #else
1128                 Debug( LDAP_DEBUG_ANY,
1129                         "connection_read(%ld): no connection!\n",
1130                         (long) s, 0, 0 );
1131 #endif
1132                 slapd_remove(s, 0);
1133
1134                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1135                 return -1;
1136         }
1137
1138         c->c_n_read++;
1139
1140         if( c->c_conn_state == SLAP_C_CLOSING ) {
1141 #ifdef NEW_LOGGING
1142                 LDAP_LOG( CONNECTION, INFO,
1143                         "connection_read: conn %lu connection closing, ignoring input\n",
1144                         c->c_connid, 0, 0 );
1145 #else
1146                 Debug( LDAP_DEBUG_TRACE,
1147                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1148                         s, c->c_connid, 0 );
1149 #endif
1150                 connection_return( c );
1151                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1152                 return 0;
1153         }
1154
1155 #ifdef NEW_LOGGING
1156         LDAP_LOG( CONNECTION, DETAIL1,
1157                    "connection_read: conn %lu  checking for input.\n",
1158                    c->c_connid, 0, 0  );
1159 #else
1160         Debug( LDAP_DEBUG_TRACE,
1161                 "connection_read(%d): checking for input on id=%lu\n",
1162                 s, c->c_connid, 0 );
1163 #endif
1164
1165 #ifdef HAVE_TLS
1166         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1167                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1168                 if ( rc < 0 ) {
1169 #if 0 /* required by next #if 0 */
1170                         struct timeval tv;
1171                         fd_set rfd;
1172 #endif
1173
1174 #ifdef NEW_LOGGING
1175                         LDAP_LOG( CONNECTION, ERR,
1176                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1177                                    c->c_connid, rc, 0 );
1178 #else
1179                         Debug( LDAP_DEBUG_TRACE,
1180                                 "connection_read(%d): TLS accept error "
1181                                 "error=%d id=%lu, closing\n",
1182                                 s, rc, c->c_connid );
1183 #endif
1184                         c->c_needs_tls_accept = 0;
1185                         /* connections_mutex and c_mutex are locked */
1186                         connection_closing( c );
1187
1188 #if 0
1189                         /* Drain input before close, to allow SSL error codes
1190                          * to propagate to client. */
1191                         FD_ZERO(&rfd);
1192                         FD_SET(s, &rfd);
1193                         for (rc=1; rc>0;) {
1194                             tv.tv_sec = 1;
1195                             tv.tv_usec = 0;
1196                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1197                             if (rc == 1) {
1198                                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1199                                 }
1200                         }
1201 #endif
1202                         connection_close( c );
1203
1204                 } else if ( rc == 0 ) {
1205                         void *ssl;
1206                         struct berval authid = { 0, NULL };
1207
1208                         c->c_needs_tls_accept = 0;
1209
1210                         /* we need to let SASL know */
1211                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1212
1213                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1214                         if( c->c_tls_ssf > c->c_ssf ) {
1215                                 c->c_ssf = c->c_tls_ssf;
1216                         }
1217
1218                         rc = dnX509peerNormalize( ssl, &authid );
1219                         if ( rc != LDAP_SUCCESS ) {
1220 #ifdef NEW_LOGGING
1221                                 LDAP_LOG( CONNECTION, INFO,
1222                                         "connection_read: conn %lu unable to get TLS client DN, "
1223                                         "error %d\n", c->c_connid, rc, 0 );
1224 #else
1225                                 Debug( LDAP_DEBUG_TRACE,
1226                                 "connection_read(%d): unable to get TLS client DN "
1227                                 "error=%d id=%lu\n",
1228                                 s, rc, c->c_connid );
1229 #endif
1230                         }
1231                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1232                         if ( authid.bv_val )    free( authid.bv_val );
1233                 }
1234
1235                 /* if success and data is ready, fall thru to data input loop */
1236                 if( rc != 0 ||
1237                         !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1238                 {
1239                         connection_return( c );
1240                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1241                         return 0;
1242                 }
1243         }
1244 #endif
1245
1246 #ifdef HAVE_CYRUS_SASL
1247         if ( c->c_sasl_layers ) {
1248                 /* If previous layer is not removed yet, give up for now */
1249                 if ( !c->c_sasl_sockctx ) {
1250                         connection_return( c );
1251                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1252                         return 0;
1253                 }
1254
1255                 c->c_sasl_layers = 0;
1256
1257                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_sockctx );
1258
1259                 if( rc != LDAP_SUCCESS ) {
1260 #ifdef NEW_LOGGING
1261                         LDAP_LOG( CONNECTION, ERR,
1262                                 "connection_read: conn %lu SASL install error %d, closing\n",
1263                                 c->c_connid, rc, 0 );
1264 #else
1265                         Debug( LDAP_DEBUG_TRACE,
1266                                 "connection_read(%d): SASL install error "
1267                                 "error=%d id=%lu, closing\n",
1268                                 s, rc, c->c_connid );
1269 #endif
1270                         /* connections_mutex and c_mutex are locked */
1271                         connection_closing( c );
1272                         connection_close( c );
1273                         connection_return( c );
1274                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1275                         return 0;
1276                 }
1277         }
1278 #endif
1279
1280 #define CONNECTION_INPUT_LOOP 1
1281 /* #define      DATA_READY_LOOP 1 */
1282
1283         do
1284         {
1285                 /* How do we do this without getting into a busy loop ? */
1286                 rc = connection_input( c );
1287         }
1288 #ifdef DATA_READY_LOOP
1289         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) );
1290 #elif CONNECTION_INPUT_LOOP
1291         while(!rc);
1292 #else
1293         while(0);
1294 #endif
1295
1296         if( rc < 0 ) {
1297 #ifdef NEW_LOGGING
1298                 LDAP_LOG( CONNECTION, ERR,
1299                         "connection_read: conn %lu  input error %d, closing.\n",
1300                         c->c_connid, rc, 0 );
1301 #else
1302                 Debug( LDAP_DEBUG_TRACE,
1303                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1304                         s, rc, c->c_connid );
1305 #endif
1306                 /* connections_mutex and c_mutex are locked */
1307                 connection_closing( c );
1308                 connection_close( c );
1309                 connection_return( c );
1310                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1311                 return 0;
1312         }
1313
1314         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1315                 slapd_set_read( s, 1 );
1316         }
1317
1318         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1319                 slapd_set_write( s, 1 );
1320         }
1321
1322         connection_return( c );
1323         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1324         return 0;
1325 }
1326
1327 static int
1328 connection_input(
1329     Connection *conn
1330 )
1331 {
1332         Operation *op;
1333         ber_tag_t       tag;
1334         ber_len_t       len;
1335         ber_int_t       msgid;
1336         BerElement      *ber;
1337         int             rc;
1338 #ifdef LDAP_CONNECTIONLESS
1339         Sockaddr        peeraddr;
1340         char            *cdn = NULL;
1341 #endif
1342
1343         if ( conn->c_currentber == NULL &&
1344                 ( conn->c_currentber = ber_alloc()) == NULL )
1345         {
1346 #ifdef NEW_LOGGING
1347                 LDAP_LOG( CONNECTION, ERR,
1348                         "connection_input: conn %lu  ber_alloc failed.\n",
1349                         conn->c_connid, 0, 0 );
1350 #else
1351                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1352 #endif
1353                 return -1;
1354         }
1355
1356         errno = 0;
1357
1358 #ifdef LDAP_CONNECTIONLESS
1359         if ( conn->c_is_udp ) {
1360                 char    peername[sizeof("IP=255.255.255.255:65336")];
1361                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1362                         sizeof(struct sockaddr));
1363                 if (len != sizeof(struct sockaddr))
1364                         return 1;
1365                 sprintf( peername, "IP=%s:%d",
1366                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1367                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1368                 Statslog( LDAP_DEBUG_STATS,
1369                         "conn=%lu UDP request from %s (%s) accepted.\n",
1370                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1371         }
1372 #endif
1373         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1374         if ( tag != LDAP_TAG_MESSAGE ) {
1375                 int err = errno;
1376                 ber_socket_t    sd;
1377
1378                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1379
1380 #ifdef NEW_LOGGING
1381                 LDAP_LOG( CONNECTION, ERR,
1382                         "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1383                         conn->c_connid, err, sock_errstr(err) );
1384 #else
1385                 Debug( LDAP_DEBUG_TRACE,
1386                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1387                         sd, err, sock_errstr(err) );
1388 #endif
1389                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1390                         /* log, close and send error */
1391                         ber_free( conn->c_currentber, 1 );
1392                         conn->c_currentber = NULL;
1393
1394                         return -2;
1395                 }
1396                 return 1;
1397         }
1398
1399         ber = conn->c_currentber;
1400         conn->c_currentber = NULL;
1401
1402         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1403                 /* log, close and send error */
1404 #ifdef NEW_LOGGING
1405                 LDAP_LOG( CONNECTION, ERR,
1406                         "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1407                         conn->c_connid, tag, 0 );
1408 #else
1409                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1410                     0 );
1411 #endif
1412                 ber_free( ber, 1 );
1413                 return -1;
1414         }
1415
1416         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1417                 /* log, close and send error */
1418 #ifdef NEW_LOGGING
1419                 LDAP_LOG( CONNECTION, ERR,
1420                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1421                            conn->c_connid, tag, 0 );
1422 #else
1423                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1424                     0 );
1425 #endif
1426                 ber_free( ber, 1 );
1427
1428                 return -1;
1429         }
1430
1431 #ifdef LDAP_CONNECTIONLESS
1432         if( conn->c_is_udp ) {
1433                 if( tag == LBER_OCTETSTRING ) {
1434                         ber_get_stringa( ber, &cdn );
1435                         tag = ber_peek_tag(ber, &len);
1436                 }
1437                 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1438 #ifdef NEW_LOGGING
1439                     LDAP_LOG( CONNECTION, ERR,
1440                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1441                                conn->c_connid, tag, 0 );
1442 #else
1443                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1444                         0 );
1445 #endif
1446                     ber_free( ber, 1 );
1447                     return 0;
1448                 }
1449         }
1450 #endif
1451         if(tag == LDAP_REQ_BIND) {
1452                 /* immediately abandon all exiting operations upon BIND */
1453                 connection_abandon( conn );
1454         }
1455
1456         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1457
1458         op->o_conn = conn;
1459         op->vrFilter = NULL;
1460 #ifdef LDAP_CONTROL_PAGEDRESULTS
1461         op->o_pagedresults_state = conn->c_pagedresults_state;
1462 #endif
1463 #ifdef LDAP_CONNECTIONLESS
1464         if (conn->c_is_udp) {
1465
1466                 if ( cdn ) {
1467                     ber_str2bv( cdn, 0, 1, &op->o_dn );
1468                     op->o_protocol = LDAP_VERSION2;
1469                 }
1470                 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1471                 if (op->o_res_ber == NULL)
1472                         return 1;
1473
1474                 rc = ber_write(op->o_res_ber, (char *)&peeraddr, sizeof(struct sockaddr), 0);
1475                 if (rc != sizeof(struct sockaddr)) {
1476 #ifdef NEW_LOGGING
1477                         LDAP_LOG( CONNECTION, INFO,
1478                                 "connection_input: conn %lu  ber_write failed\n",
1479                                 conn->c_connid, 0, 0 );
1480 #else
1481                         Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1482 #endif
1483                         return 1;
1484                 }
1485
1486                 if (op->o_protocol == LDAP_VERSION2) {
1487                         rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1488                         if (rc == -1) {
1489 #ifdef NEW_LOGGING
1490                                 LDAP_LOG( CONNECTION, INFO,
1491                                         "connection_input: conn %lu  put outer sequence failed\n",
1492                                         conn->c_connid, 0, 0 );
1493 #else
1494                                 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1495 #endif
1496                                 return rc;
1497                         }
1498                 }
1499         }
1500 #endif /* LDAP_CONNECTIONLESS */
1501
1502         rc = 0;
1503
1504         /* Don't process requests when the conn is in the middle of a
1505          * Bind, or if it's closing. Also, don't let any single conn
1506          * use up all the available threads, and don't execute if we're
1507          * currently blocked on output. And don't execute if there are
1508          * already pending ops, let them go first.
1509          */
1510         if ( conn->c_conn_state == SLAP_C_BINDING
1511                 || conn->c_conn_state == SLAP_C_CLOSING
1512                 || conn->c_n_ops_executing >= connection_pool_max/2
1513                 || conn->c_n_ops_pending
1514                 || conn->c_writewaiter)
1515         {
1516                 int max = conn->c_dn.bv_len ? slap_conn_max_pending_auth
1517                          : slap_conn_max_pending;
1518 #ifdef NEW_LOGGING
1519                 LDAP_LOG( CONNECTION, INFO,
1520                         "connection_input: conn %lu  deferring operation\n",
1521                         conn->c_connid, 0, 0 );
1522 #else
1523                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1524 #endif
1525                 conn->c_n_ops_pending++;
1526                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1527                 if ( conn->c_n_ops_pending > max ) {
1528                         rc = -1;
1529                 } else {
1530                         rc = 1;
1531                 }
1532         } else {
1533                 conn->c_n_ops_executing++;
1534                 connection_op_activate( op );
1535         }
1536
1537 #ifdef NO_THREADS
1538         if ( conn->c_struct_state != SLAP_C_USED ) {
1539                 /* connection must have got closed underneath us */
1540                 return 1;
1541         }
1542 #endif
1543         assert( conn->c_struct_state == SLAP_C_USED );
1544
1545         return rc;
1546 }
1547
1548 static int
1549 connection_resched( Connection *conn )
1550 {
1551         Operation *op;
1552
1553         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1554                 int rc;
1555                 ber_socket_t    sd;
1556                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1557
1558                 /* us trylock to avoid possible deadlock */
1559                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1560
1561                 if( rc ) {
1562 #ifdef NEW_LOGGING
1563                         LDAP_LOG( CONNECTION, DETAIL1,
1564                                 "connection_resched: conn %lu  reaquiring locks.\n",
1565                                 conn->c_connid, 0, 0 );
1566 #else
1567                         Debug( LDAP_DEBUG_TRACE,
1568                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1569                                 conn->c_connid, sd, 0 );
1570 #endif
1571                         /*
1572                          * reaquire locks in the right order...
1573                          * this may allow another thread to close this connection,
1574                          * so recheck state below.
1575                          */
1576                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1577                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1578                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1579                 }
1580
1581                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1582 #ifdef NEW_LOGGING
1583                         LDAP_LOG( CONNECTION, INFO,
1584                                 "connection_resched: conn %lu  closed by other thread.\n",
1585                                 conn->c_connid, 0, 0 );
1586 #else
1587                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1588                                 "closed by other thread conn=%lu sd=%d\n",
1589                                 conn->c_connid, sd, 0 );
1590 #endif
1591                 } else {
1592 #ifdef NEW_LOGGING
1593                         LDAP_LOG( CONNECTION, DETAIL1,
1594                                 "connection_resched: conn %lu  attempting closing.\n",
1595                                 conn->c_connid, 0, 0 );
1596 #else
1597                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1598                                 "attempting closing conn=%lu sd=%d\n",
1599                                 conn->c_connid, sd, 0 );
1600 #endif
1601                         connection_close( conn );
1602                 }
1603
1604                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1605                 return 0;
1606         }
1607
1608         if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1609                 /* other states need different handling */
1610                 return 0;
1611         }
1612
1613         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1614                 if ( conn->c_n_ops_executing > connection_pool_max/2 ) {
1615                         break;
1616                 }
1617                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1618                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1619                 /* pending operations should not be marked for abandonment */
1620                 assert(!op->o_abandon);
1621
1622                 conn->c_n_ops_pending--;
1623                 conn->c_n_ops_executing++;
1624
1625                 connection_op_activate( op );
1626
1627                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1628                         break;
1629                 }
1630         }
1631         return 0;
1632 }
1633
1634 static int connection_op_activate( Operation *op )
1635 {
1636         int status;
1637         ber_tag_t tag = op->o_tag;
1638
1639         if(tag == LDAP_REQ_BIND) {
1640                 op->o_conn->c_conn_state = SLAP_C_BINDING;
1641         }
1642
1643         if (!op->o_dn.bv_len) {
1644             op->o_authz = op->o_conn->c_authz;
1645             ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1646             ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1647         }
1648         op->o_authtype = op->o_conn->c_authtype;
1649         ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1650
1651         if (!op->o_protocol) {
1652             op->o_protocol = op->o_conn->c_protocol
1653                 ? op->o_conn->c_protocol : LDAP_VERSION3;
1654         }
1655         if (op->o_conn->c_conn_state == SLAP_C_INACTIVE
1656                 && op->o_protocol > LDAP_VERSION2) {
1657                 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1658         }
1659
1660         op->o_connid = op->o_conn->c_connid;
1661
1662         LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1663
1664         status = ldap_pvt_thread_pool_submit( &connection_pool,
1665                 connection_operation, (void *) op );
1666
1667         if ( status != 0 ) {
1668 #ifdef NEW_LOGGING
1669                 LDAP_LOG( CONNECTION, ERR,
1670                         "connection_op_activate: conn %lu        thread pool submit failed.\n",
1671                         op->o_connid, 0, 0 );
1672 #else
1673                 Debug( LDAP_DEBUG_ANY,
1674                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1675 #endif
1676                 /* should move op to pending list */
1677         }
1678
1679         return status;
1680 }
1681
1682 int connection_write(ber_socket_t s)
1683 {
1684         Connection *c;
1685
1686         assert( connections != NULL );
1687
1688         ldap_pvt_thread_mutex_lock( &connections_mutex );
1689
1690         c = connection_get( s );
1691
1692         slapd_clr_write( s, 0);
1693
1694         if( c == NULL ) {
1695 #ifdef NEW_LOGGING
1696                 LDAP_LOG( CONNECTION, ERR,
1697                         "connection_write: sock %ld  no connection!\n", (long)s, 0, 0);
1698 #else
1699                 Debug( LDAP_DEBUG_ANY,
1700                         "connection_write(%ld): no connection!\n",
1701                         (long) s, 0, 0 );
1702 #endif
1703                 slapd_remove(s, 0);
1704                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1705                 return -1;
1706         }
1707
1708         c->c_n_write++;
1709
1710 #ifdef NEW_LOGGING
1711         LDAP_LOG( CONNECTION, DETAIL1,
1712                 "connection_write conn %lu  waking output.\n", c->c_connid, 0, 0 );
1713 #else
1714         Debug( LDAP_DEBUG_TRACE,
1715                 "connection_write(%d): waking output for id=%lu\n",
1716                 s, c->c_connid, 0 );
1717 #endif
1718         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1719
1720         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1721                 slapd_set_read( s, 1 );
1722         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1723                 slapd_set_write( s, 1 );
1724         connection_return( c );
1725         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1726         return 0;
1727 }
1728