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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 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( Connection *conn, 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 struct co_arg {
  64         Connection      *co_conn;
  65         Operation       *co_op;
  66 };
  67
  68 /*
  69  * Initialize connection management infrastructure.
  70  */
  71 int connections_init(void)
  72 {
  73         assert( connections == NULL );
  74
  75         if( connections != NULL) {
  76 #ifdef NEW_LOGGING
  77                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  78                            "connections_init:  already initialized.\n" ));
  79 #else
  80                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  81                         0, 0, 0 );
  82 #endif
  83                 return -1;
  84         }
  85
  86         /* should check return of every call */
  87         ldap_pvt_thread_mutex_init( &connections_mutex );
  88
  89         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  90
  91         if( connections == NULL ) {
  92 #ifdef NEW_LOGGING
  93                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  94                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  95                            dtblsize, (long) sizeof(Connection) ));
  96 #else
  97                 Debug( LDAP_DEBUG_ANY,
  98                         "connections_init: allocation (%d*%ld) of connection array failed\n",
  99                         dtblsize, (long) sizeof(Connection), 0 );
 100 #endif
 101                 return -1;
 102         }
 103
 104     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 105     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 106
 107         /*
 108          * per entry initialization of the Connection array initialization
 109          * will be done by connection_init()
 110          */
 111
 112         return 0;
 113 }
 114
 115 /*
 116  * Destroy connection management infrastructure.
 117  */
 118 int connections_destroy(void)
 119 {
 120         ber_socket_t i;
 121
 122         /* should check return of every call */
 123
 124         if( connections == NULL) {
 125 #ifdef NEW_LOGGING
 126                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 127                            "connections_destroy: nothing to destroy.\n"));
 128 #else
 129                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 130                         0, 0, 0 );
 131 #endif
 132                 return -1;
 133         }
 134
 135         for ( i = 0; i < dtblsize; i++ ) {
 136                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 137                         ber_sockbuf_free( connections[i].c_sb );
 138                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 140                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 141                 }
 142         }
 143
 144         free( connections );
 145         connections = NULL;
 146
 147         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 148         return 0;
 149 }
 150
 151 /*
 152  * shutdown all connections
 153  */
 154 int connections_shutdown(void)
 155 {
 156         ber_socket_t i;
 157
 158         ldap_pvt_thread_mutex_lock( &connections_mutex );
 159
 160         for ( i = 0; i < dtblsize; i++ ) {
 161                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 162                         continue;
 163                 }
 164
 165                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 166
 167                 /* connections_mutex and c_mutex are locked */
 168                 connection_closing( &connections[i] );
 169                 connection_close( &connections[i] );
 170
 171                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 172         }
 173
 174         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 175
 176         return 0;
 177 }
 178
 179 /*
 180  * Timeout idle connections.
 181  */
 182 int connections_timeout_idle(time_t now)
 183 {
 184         int i = 0;
 185         int connindex;
 186         Connection* c;
 187
 188         for( c = connection_first( &connindex );
 189                 c != NULL;
 190                 c = connection_next( c, &connindex ) )
 191         {
 192                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 193                         /* close it */
 194                         connection_closing( c );
 195                         connection_close( c );
 196                         i++;
 197                 }
 198         }
 199         connection_done( c );
 200
 201         return i;
 202 }
 203
 204 static Connection* connection_get( ber_socket_t s )
 205 {
 206         /* connections_mutex should be locked by caller */
 207
 208         Connection *c;
 209
 210 #ifdef NEW_LOGGING
 211         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 212                    "connection_get: socket %ld\n", (long)s ));
 213 #else
 214         Debug( LDAP_DEBUG_ARGS,
 215                 "connection_get(%ld)\n",
 216                 (long) s, 0, 0 );
 217 #endif
 218
 219         assert( connections != NULL );
 220
 221         if(s == AC_SOCKET_INVALID) {
 222                 return NULL;
 223         }
 224
 225 #ifndef HAVE_WINSOCK
 226         c = &connections[s];
 227
 228         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 229
 230 #else
 231         c = NULL;
 232         {
 233                 ber_socket_t i, sd;
 234
 235                 for(i=0; i<dtblsize; i++) {
 236                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 237                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 238                                 assert( connections[i].c_sb == 0 );
 239                                 break;
 240                         }
 241
 242                         ber_sockbuf_ctrl( connections[i].c_sb,
 243                                 LBER_SB_OPT_GET_FD, &sd );
 244
 245                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 246                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 247                                 assert( sd == AC_SOCKET_INVALID );
 248                                 continue;
 249                         }
 250
 251                         /* state can actually change from used -> unused by resched,
 252                          * so don't assert details here.
 253                          */
 254
 255                         if( sd == s ) {
 256                                 c = &connections[i];
 257                                 break;
 258                         }
 259                 }
 260         }
 261 #endif
 262
 263         if( c != NULL ) {
 264                 ber_socket_t    sd;
 265
 266                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 267
 268                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 269                 if( c->c_struct_state != SLAP_C_USED ) {
 270                         /* connection must have been closed due to resched */
 271
 272                         assert( c->c_conn_state == SLAP_C_INVALID );
 273                         assert( sd == AC_SOCKET_INVALID );
 274
 275 #ifdef NEW_LOGGING
 276                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 277                                    "connection_get:  connection %d not used\n", s ));
 278 #else
 279                         Debug( LDAP_DEBUG_TRACE,
 280                                 "connection_get(%d): connection not used\n",
 281                                 s, 0, 0 );
 282 #endif
 283
 284                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 285                         return NULL;
 286                 }
 287
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 290                            "connection_get: get for %d got connid %lu\n", s, c->c_connid ));
 291 #else
 292                 Debug( LDAP_DEBUG_TRACE,
 293                         "connection_get(%d): got connid=%lu\n",
 294                         s, c->c_connid, 0 );
 295 #endif
 296
 297                 c->c_n_get++;
 298
 299                 assert( c->c_struct_state == SLAP_C_USED );
 300                 assert( c->c_conn_state != SLAP_C_INVALID );
 301                 assert( sd != AC_SOCKET_INVALID );
 302
 303 #ifdef SLAPD_MONITOR
 304                 c->c_activitytime = slap_get_time();
 305 #else
 306                 if( global_idletimeout > 0 ) {
 307                         c->c_activitytime = slap_get_time();
 308                 }
 309 #endif
 310         }
 311
 312         return c;
 313 }
 314
 315 static void connection_return( Connection *c )
 316 {
 317         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 318 }
 319
 320 long connection_init(
 321         ber_socket_t s,
 322         const char* url,
 323         const char* dnsname,
 324         const char* peername,
 325         const char* sockname,
 326         int tls_udp_option,
 327         slap_ssf_t ssf,
 328         const char *authid )
 329 {
 330         unsigned long id;
 331         Connection *c;
 332
 333         assert( connections != NULL );
 334
 335         assert( dnsname != NULL );
 336         assert( peername != NULL );
 337         assert( sockname != NULL );
 338
 339 #ifndef HAVE_TLS
 340         assert( tls_udp_option != 1 );
 341 #endif
 342
 343         if( s == AC_SOCKET_INVALID ) {
 344 #ifdef NEW_LOGGING
 345                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 346                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 347 #else
 348                 Debug( LDAP_DEBUG_ANY,
 349                        "connection_init(%ld): invalid.\n",
 350                        (long) s, 0, 0 );
 351 #endif
 352                 return -1;
 353         }
 354
 355         assert( s >= 0 );
 356 #ifndef HAVE_WINSOCK
 357         assert( s < dtblsize );
 358 #endif
 359
 360         ldap_pvt_thread_mutex_lock( &connections_mutex );
 361
 362 #ifndef HAVE_WINSOCK
 363         c = &connections[s];
 364
 365 #else
 366         {
 367                 ber_socket_t    i;
 368
 369                 c = NULL;
 370
 371         for( i=0; i < dtblsize; i++) {
 372                 ber_socket_t    sd;
 373
 374             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 375                 assert( connections[i].c_sb == 0 );
 376                 c = &connections[i];
 377                 break;
 378             }
 379
 380                         sd = AC_SOCKET_INVALID;
 381                         if (connections[i].c_sb != NULL)
 382                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 383
 384             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 385                 assert( sd == AC_SOCKET_INVALID );
 386                 c = &connections[i];
 387                 break;
 388             }
 389
 390             assert( connections[i].c_struct_state == SLAP_C_USED );
 391             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 392             assert( sd != AC_SOCKET_INVALID );
 393         }
 394
 395         if( c == NULL ) {
 396 #ifdef NEW_LOGGING
 397                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 398                            "connection_init: skt %d      connection table full (%d/%d)\n",
 399                            s, i, dtblsize ));
 400 #else
 401                 Debug( LDAP_DEBUG_ANY,
 402                                 "connection_init(%d): connection table full (%d/%d)\n",
 403                                 s, i, dtblsize);
 404 #endif
 405             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 406             return -1;
 407         }
 408     }
 409 #endif
 410
 411     assert( c != NULL );
 412
 413         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 414                 c->c_authmech.bv_val = NULL;
 415                 c->c_authmech.bv_len = 0;
 416                 c->c_dn.bv_val = NULL;
 417                 c->c_dn.bv_len = 0;
 418                 c->c_ndn.bv_val = NULL;
 419                 c->c_ndn.bv_len = 0;
 420                 c->c_groups = NULL;
 421
 422                 c->c_listener_url.bv_val = NULL;
 423                 c->c_listener_url.bv_len = 0;
 424                 c->c_peer_domain.bv_val = NULL;
 425                 c->c_peer_domain.bv_len = 0;
 426                 c->c_peer_name.bv_val = NULL;
 427                 c->c_peer_name.bv_len = 0;
 428                 c->c_sock_name.bv_val = NULL;
 429                 c->c_sock_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
 439                 c->c_sb = ber_sockbuf_alloc( );
 440
 441                 {
 442                         ber_len_t max = sockbuf_max_incoming;
 443                         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 444                 }
 445
 446                 c->c_currentber = NULL;
 447
 448                 /* should check status of thread calls */
 449                 ldap_pvt_thread_mutex_init( &c->c_mutex );
 450                 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
 451                 ldap_pvt_thread_cond_init( &c->c_write_cv );
 452
 453                 c->c_struct_state = SLAP_C_UNUSED;
 454         }
 455
 456     ldap_pvt_thread_mutex_lock( &c->c_mutex );
 457
 458     assert( c->c_struct_state == SLAP_C_UNUSED );
 459     assert( c->c_authmech.bv_val == NULL );
 460     assert( c->c_dn.bv_val == NULL );
 461     assert( c->c_ndn.bv_val == NULL );
 462     assert( c->c_groups == NULL );
 463     assert( c->c_listener_url.bv_val == NULL );
 464     assert( c->c_peer_domain.bv_val == NULL );
 465     assert( c->c_peer_name.bv_val == NULL );
 466     assert( c->c_sock_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_currentber == NULL );
 473
 474         ber_str2bv( url, 0, 1, &c->c_listener_url );
 475         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 476         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 477         ber_str2bv( sockname, 0, 1, &c->c_sock_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         {
 503                 c->c_is_udp = 1;
 504 #ifdef LDAP_DEBUG
 505         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 506                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 507 #endif
 508         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 509                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 510         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 511                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 512         } else
 513 #endif
 514         {
 515 #ifdef LDAP_DEBUG
 516         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 517                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 518 #endif
 519         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 520                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 521         }
 522
 523 #ifdef LDAP_DEBUG
 524         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 525                 INT_MAX, (void*)"ldap_" );
 526 #endif
 527
 528         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 529                 c /* non-NULL */ ) < 0 )
 530         {
 531 #ifdef NEW_LOGGING
 532                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 533                            "connection_init: conn %lu  set nonblocking failed\n",
 534                            c->c_connid ));
 535 #else
 536                 Debug( LDAP_DEBUG_ANY,
 537                         "connection_init(%d, %s): set nonblocking failed\n",
 538                         s, c->c_peer_name.bv_val, 0 );
 539 #endif
 540         }
 541
 542     id = c->c_connid = conn_nextid++;
 543
 544     c->c_conn_state = SLAP_C_INACTIVE;
 545     c->c_struct_state = SLAP_C_USED;
 546
 547         c->c_ssf = c->c_transport_ssf = ssf;
 548         c->c_tls_ssf = 0;
 549
 550 #ifdef HAVE_TLS
 551     if ( tls_udp_option == 1 ) {
 552             c->c_is_tls = 1;
 553             c->c_needs_tls_accept = 1;
 554     } else {
 555             c->c_is_tls = 0;
 556             c->c_needs_tls_accept = 0;
 557     }
 558 #endif
 559
 560         slap_sasl_open( c );
 561         slap_sasl_external( c, ssf, authid );
 562
 563     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 564     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 565
 566     backend_connection_init(c);
 567
 568     return id;
 569 }
 570
 571 void connection2anonymous( Connection *c )
 572 {
 573         assert( connections != NULL );
 574         assert( c != NULL );
 575
 576         {
 577                 ber_len_t max = sockbuf_max_incoming;
 578                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 579         }
 580
 581         if(c->c_authmech.bv_val != NULL ) {
 582                 free(c->c_authmech.bv_val);
 583                 c->c_authmech.bv_val = NULL;
 584         }
 585         c->c_authmech.bv_len = 0;
 586
 587         if(c->c_dn.bv_val != NULL) {
 588                 free(c->c_dn.bv_val);
 589                 c->c_dn.bv_val = NULL;
 590         }
 591         c->c_dn.bv_len = 0;
 592         if(c->c_ndn.bv_val != NULL) {
 593                 free(c->c_ndn.bv_val);
 594                 c->c_ndn.bv_val = NULL;
 595         }
 596         c->c_ndn.bv_len = 0;
 597
 598         c->c_authz_backend = NULL;
 599
 600         {
 601                 GroupAssertion *g, *n;
 602                 for (g = c->c_groups; g; g=n) {
 603                         n = g->ga_next;
 604                         free(g);
 605                 }
 606                 c->c_groups = NULL;
 607         }
 608 }
 609
 610 static void
 611 connection_destroy( Connection *c )
 612 {
 613         /* note: connections_mutex should be locked by caller */
 614     ber_socket_t        sd;
 615     unsigned long       connid;
 616
 617     assert( connections != NULL );
 618     assert( c != NULL );
 619     assert( c->c_struct_state != SLAP_C_UNUSED );
 620     assert( c->c_conn_state != SLAP_C_INVALID );
 621     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 622
 623     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 624     connid = c->c_connid;
 625
 626     backend_connection_destroy(c);
 627
 628     c->c_protocol = 0;
 629     c->c_connid = -1;
 630
 631     c->c_activitytime = c->c_starttime = 0;
 632
 633         connection2anonymous( c );
 634
 635         if(c->c_listener_url.bv_val != NULL) {
 636                 free(c->c_listener_url.bv_val);
 637                 c->c_listener_url.bv_val = NULL;
 638         }
 639         c->c_listener_url.bv_len = 0;
 640
 641         if(c->c_peer_domain.bv_val != NULL) {
 642                 free(c->c_peer_domain.bv_val);
 643                 c->c_peer_domain.bv_val = NULL;
 644         }
 645         c->c_peer_domain.bv_len = 0;
 646         if(c->c_peer_name.bv_val != NULL) {
 647 #ifdef LDAP_PF_LOCAL
 648                 /*
 649                  * If peer was a domain socket, unlink. Mind you,
 650                  * they may be un-named. Should we leave this to
 651                  * the client?
 652                  */
 653                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 654                                         sizeof("PATH=") - 1) == 0) {
 655                         char *path = c->c_peer_name.bv_val
 656                                 + sizeof("PATH=") - 1;
 657                         if (path[0] != '\0') {
 658                                 (void)unlink(path);
 659                         }
 660                 }
 661 #endif /* LDAP_PF_LOCAL */
 662
 663                 free(c->c_peer_name.bv_val);
 664                 c->c_peer_name.bv_val = NULL;
 665         }
 666         c->c_peer_name.bv_len = 0;
 667         if(c->c_sock_name.bv_val != NULL) {
 668                 free(c->c_sock_name.bv_val);
 669                 c->c_sock_name.bv_val = NULL;
 670         }
 671         c->c_sock_name.bv_len = 0;
 672
 673         c->c_sasl_bind_in_progress = 0;
 674         if(c->c_sasl_bind_mech.bv_val != NULL) {
 675                 free(c->c_sasl_bind_mech.bv_val);
 676                 c->c_sasl_bind_mech.bv_val = NULL;
 677         }
 678         c->c_sasl_bind_mech.bv_len = 0;
 679
 680         slap_sasl_close( c );
 681
 682         if ( c->c_currentber != NULL ) {
 683                 ber_free( c->c_currentber, 1 );
 684                 c->c_currentber = NULL;
 685         }
 686
 687         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 688         if ( sd != AC_SOCKET_INVALID ) {
 689                 slapd_remove( sd, 0 );
 690
 691                 Statslog( LDAP_DEBUG_STATS,
 692                     "conn=%lu fd=%d closed\n",
 693                         connid, sd, 0, 0, 0 );
 694         }
 695
 696         ber_sockbuf_free( c->c_sb );
 697
 698         c->c_sb = ber_sockbuf_alloc( );
 699
 700         {
 701                 ber_len_t max = sockbuf_max_incoming;
 702                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 703         }
 704
 705     c->c_conn_state = SLAP_C_INVALID;
 706     c->c_struct_state = SLAP_C_UNUSED;
 707 }
 708
 709 int connection_state_closing( Connection *c )
 710 {
 711         /* c_mutex must be locked by caller */
 712
 713         int state;
 714         assert( c != NULL );
 715         assert( c->c_struct_state == SLAP_C_USED );
 716
 717         state = c->c_conn_state;
 718
 719         assert( state != SLAP_C_INVALID );
 720
 721         return state == SLAP_C_CLOSING;
 722 }
 723
 724 static void connection_abandon( Connection *c )
 725 {
 726         /* c_mutex must be locked by caller */
 727
 728         Operation *o;
 729
 730         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 731                 o->o_abandon = 1;
 732         }
 733
 734         /* remove pending operations */
 735         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 736                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 737                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 738                 slap_op_free( o );
 739         }
 740 }
 741
 742 void connection_closing( Connection *c )
 743 {
 744         assert( connections != NULL );
 745         assert( c != NULL );
 746         assert( c->c_struct_state == SLAP_C_USED );
 747         assert( c->c_conn_state != SLAP_C_INVALID );
 748
 749         /* c_mutex must be locked by caller */
 750
 751         if( c->c_conn_state != SLAP_C_CLOSING ) {
 752                 ber_socket_t    sd;
 753
 754                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 755 #ifdef NEW_LOGGING
 756                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 757                            "connection_closing: conn %lu readying socket %d for close.\n",
 758                            c->c_connid, sd ));
 759 #else
 760                 Debug( LDAP_DEBUG_TRACE,
 761                         "connection_closing: readying conn=%lu sd=%d for close\n",
 762                         c->c_connid, sd, 0 );
 763 #endif
 764                 /* update state to closing */
 765                 c->c_conn_state = SLAP_C_CLOSING;
 766
 767                 /* don't listen on this port anymore */
 768                 slapd_clr_read( sd, 1 );
 769
 770                 /* abandon active operations */
 771                 connection_abandon( c );
 772
 773                 /* wake write blocked operations */
 774                 slapd_clr_write( sd, 1 );
 775                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 776         }
 777 }
 778
 779 static void connection_close( Connection *c )
 780 {
 781         ber_socket_t    sd;
 782
 783         assert( connections != NULL );
 784         assert( c != NULL );
 785         assert( c->c_struct_state == SLAP_C_USED );
 786         assert( c->c_conn_state == SLAP_C_CLOSING );
 787
 788         /* note: connections_mutex and c_mutex should be locked by caller */
 789
 790         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 791         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 792 #ifdef NEW_LOGGING
 793                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 794                            "connection_close: conn %lu  deferring sd %d\n",
 795                            c->c_connid, sd ));
 796 #else
 797                 Debug( LDAP_DEBUG_TRACE,
 798                         "connection_close: deferring conn=%lu sd=%d\n",
 799                         c->c_connid, sd, 0 );
 800 #endif
 801                 return;
 802         }
 803
 804 #ifdef NEW_LOGGING
 805         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 806                    "connection_close: conn %lu  sd %d\n",
 807                    c->c_connid, sd ));
 808 #else
 809         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 810                 c->c_connid, sd, 0 );
 811 #endif
 812         connection_destroy( c );
 813 }
 814
 815 unsigned long connections_nextid(void)
 816 {
 817         unsigned long id;
 818         assert( connections != NULL );
 819
 820         ldap_pvt_thread_mutex_lock( &connections_mutex );
 821
 822         id = conn_nextid;
 823
 824         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 825
 826         return id;
 827 }
 828
 829 Connection* connection_first( ber_socket_t *index )
 830 {
 831         assert( connections != NULL );
 832         assert( index != NULL );
 833
 834         ldap_pvt_thread_mutex_lock( &connections_mutex );
 835
 836         *index = 0;
 837
 838         return connection_next(NULL, index);
 839 }
 840
 841 Connection* connection_next( Connection *c, ber_socket_t *index )
 842 {
 843         assert( connections != NULL );
 844         assert( index != NULL );
 845         assert( *index <= dtblsize );
 846
 847         if( c != NULL ) {
 848                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 849         }
 850
 851         c = NULL;
 852
 853         for(; *index < dtblsize; (*index)++) {
 854                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 855                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 856 #ifndef HAVE_WINSOCK
 857                         continue;
 858 #else
 859                         break;
 860 #endif
 861                 }
 862
 863                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 864                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 865                         c = &connections[(*index)++];
 866                         break;
 867                 }
 868
 869                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 870                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 871         }
 872
 873         if( c != NULL ) {
 874                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 875         }
 876
 877         return c;
 878 }
 879
 880 void connection_done( Connection *c )
 881 {
 882         assert( connections != NULL );
 883
 884         if( c != NULL ) {
 885                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 886         }
 887
 888         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 889 }
 890
 891 /*
 892  * connection_activity - handle the request operation op on connection
 893  * conn.  This routine figures out what kind of operation it is and
 894  * calls the appropriate stub to handle it.
 895  */
 896
 897 #ifdef SLAPD_MONITOR
 898 #define INCR_OP(var,index) \
 899         do { \
 900                 ldap_pvt_thread_mutex_lock( &num_ops_mutex ); \
 901                 (var)[(index)]++; \
 902                 ldap_pvt_thread_mutex_unlock( &num_ops_mutex ); \
 903         } while (0)
 904 #else /* !SLAPD_MONITOR */
 905 #define INCR_OP(var,index)
 906 #endif /* !SLAPD_MONITOR */
 907
 908 static void *
 909 connection_operation( void *arg_v )
 910 {
 911         int rc;
 912         struct co_arg   *arg = arg_v;
 913         ber_tag_t tag = arg->co_op->o_tag;
 914 #ifdef SLAPD_MONITOR
 915         ber_tag_t oldtag = tag;
 916 #endif /* SLAPD_MONITOR */
 917         Connection *conn = arg->co_conn;
 918
 919         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 920         num_ops_initiated++;
 921         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 922
 923         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 924 #ifdef NEW_LOGGING
 925                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 926                            "connection_operation: conn %lu  SASL bind in progress (tag=%ld).\n",
 927                            conn->c_connid, (long)tag ));
 928 #else
 929                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 930                         "error: SASL bind in progress (tag=%ld).\n",
 931                         (long) tag, 0, 0 );
 932 #endif
 933                 send_ldap_result( conn, arg->co_op,
 934                         rc = LDAP_OPERATIONS_ERROR,
 935                         NULL, "SASL bind in progress", NULL, NULL );
 936                 goto operations_error;
 937         }
 938
 939         switch ( tag ) {
 940         case LDAP_REQ_BIND:
 941                 INCR_OP(num_ops_initiated_, SLAP_OP_BIND);
 942                 rc = do_bind( conn, arg->co_op );
 943                 break;
 944
 945         case LDAP_REQ_UNBIND:
 946                 INCR_OP(num_ops_initiated_, SLAP_OP_UNBIND);
 947                 rc = do_unbind( conn, arg->co_op );
 948                 break;
 949
 950         case LDAP_REQ_ADD:
 951                 INCR_OP(num_ops_initiated_, SLAP_OP_ADD);
 952                 rc = do_add( conn, arg->co_op );
 953                 break;
 954
 955         case LDAP_REQ_DELETE:
 956                 INCR_OP(num_ops_initiated_, SLAP_OP_DELETE);
 957                 rc = do_delete( conn, arg->co_op );
 958                 break;
 959
 960         case LDAP_REQ_MODRDN:
 961                 INCR_OP(num_ops_initiated_, SLAP_OP_MODRDN);
 962                 rc = do_modrdn( conn, arg->co_op );
 963                 break;
 964
 965         case LDAP_REQ_MODIFY:
 966                 INCR_OP(num_ops_initiated_, SLAP_OP_MODIFY);
 967                 rc = do_modify( conn, arg->co_op );
 968                 break;
 969
 970         case LDAP_REQ_COMPARE:
 971                 INCR_OP(num_ops_initiated_, SLAP_OP_COMPARE);
 972                 rc = do_compare( conn, arg->co_op );
 973                 break;
 974
 975         case LDAP_REQ_SEARCH:
 976                 INCR_OP(num_ops_initiated_, SLAP_OP_SEARCH);
 977                 rc = do_search( conn, arg->co_op );
 978                 break;
 979
 980         case LDAP_REQ_ABANDON:
 981                 INCR_OP(num_ops_initiated_, SLAP_OP_ABANDON);
 982                 rc = do_abandon( conn, arg->co_op );
 983                 break;
 984
 985         case LDAP_REQ_EXTENDED:
 986                 INCR_OP(num_ops_initiated_, SLAP_OP_EXTENDED);
 987                 rc = do_extended( conn, arg->co_op );
 988                 break;
 989
 990         default:
 991 #ifdef NEW_LOGGING
 992                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 993                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 994                            conn->c_connid, tag ));
 995 #else
 996                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 997                     tag, 0, 0 );
 998 #endif
 999                 arg->co_op->o_tag = LBER_ERROR;
1000                 send_ldap_disconnect( conn, arg->co_op,
1001                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
1002                 rc = -1;
1003                 break;
1004         }
1005
1006 #ifdef SLAPD_MONITOR
1007         oldtag = tag;
1008 #endif /* SLAPD_MONITOR */
1009         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
1010
1011 operations_error:
1012         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1013         num_ops_completed++;
1014 #ifdef SLAPD_MONITOR
1015         switch (oldtag) {
1016         case LDAP_REQ_BIND:
1017                 num_ops_completed_[SLAP_OP_BIND]++;
1018                 break;
1019         case LDAP_REQ_UNBIND:
1020                 num_ops_completed_[SLAP_OP_UNBIND]++;
1021                 break;
1022         case LDAP_REQ_ADD:
1023                 num_ops_completed_[SLAP_OP_ADD]++;
1024                 break;
1025         case LDAP_REQ_DELETE:
1026                 num_ops_completed_[SLAP_OP_DELETE]++;
1027                 break;
1028         case LDAP_REQ_MODRDN:
1029                 num_ops_completed_[SLAP_OP_MODRDN]++;
1030                 break;
1031         case LDAP_REQ_MODIFY:
1032                 num_ops_completed_[SLAP_OP_MODIFY]++;
1033                 break;
1034         case LDAP_REQ_COMPARE:
1035                 num_ops_completed_[SLAP_OP_COMPARE]++;
1036                 break;
1037         case LDAP_REQ_SEARCH:
1038                 num_ops_completed_[SLAP_OP_SEARCH]++;
1039                 break;
1040         case LDAP_REQ_ABANDON:
1041                 num_ops_completed_[SLAP_OP_ABANDON]++;
1042                 break;
1043         case LDAP_REQ_EXTENDED:
1044                 num_ops_completed_[SLAP_OP_EXTENDED]++;
1045                 break;
1046         }
1047 #endif /* SLAPD_MONITOR */
1048         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1049
1050         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1051
1052         conn->c_n_ops_executing--;
1053         conn->c_n_ops_completed++;
1054
1055         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1056         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1057         slap_op_free( arg->co_op );
1058         arg->co_op = NULL;
1059         arg->co_conn = NULL;
1060         free( (char *) arg );
1061         arg = NULL;
1062
1063         switch( tag ) {
1064         case LBER_ERROR:
1065         case LDAP_REQ_UNBIND:
1066                 /* c_mutex is locked */
1067                 connection_closing( conn );
1068                 break;
1069
1070         case LDAP_REQ_BIND:
1071                 conn->c_sasl_bind_in_progress =
1072                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1073
1074                 if( conn->c_conn_state == SLAP_C_BINDING) {
1075                         conn->c_conn_state = SLAP_C_ACTIVE;
1076                 }
1077         }
1078
1079         connection_resched( conn );
1080
1081         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1082
1083         return NULL;
1084 }
1085
1086 int connection_read(ber_socket_t s)
1087 {
1088         int rc = 0;
1089         Connection *c;
1090         assert( connections != NULL );
1091
1092         ldap_pvt_thread_mutex_lock( &connections_mutex );
1093
1094         /* get (locked) connection */
1095         c = connection_get( s );
1096
1097         if( c == NULL ) {
1098 #ifdef NEW_LOGGING
1099                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1100                            "connection_read: sock %ld no connection\n",
1101                            (long)s ));
1102 #else
1103                 Debug( LDAP_DEBUG_ANY,
1104                         "connection_read(%ld): no connection!\n",
1105                         (long) s, 0, 0 );
1106 #endif
1107                 slapd_remove(s, 0);
1108
1109                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1110                 return -1;
1111         }
1112
1113         c->c_n_read++;
1114
1115         if( c->c_conn_state == SLAP_C_CLOSING ) {
1116 #ifdef NEW_LOGGING
1117                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1118                            "connection_read: conn %lu connection closing, ignoring input\n",
1119                            c->c_connid));
1120 #else
1121                 Debug( LDAP_DEBUG_TRACE,
1122                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1123                         s, c->c_connid, 0 );
1124 #endif
1125                 connection_return( c );
1126                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1127                 return 0;
1128         }
1129
1130 #ifdef NEW_LOGGING
1131         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1132                    "connection_read: conn %lu  checking for input.\n", c->c_connid ));
1133 #else
1134         Debug( LDAP_DEBUG_TRACE,
1135                 "connection_read(%d): checking for input on id=%lu\n",
1136                 s, c->c_connid, 0 );
1137 #endif
1138
1139 #ifdef HAVE_TLS
1140         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1141                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1142                 if ( rc < 0 ) {
1143 #if 0 /* required by next #if 0 */
1144                         struct timeval tv;
1145                         fd_set rfd;
1146 #endif
1147
1148 #ifdef NEW_LOGGING
1149                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1150                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1151                                    c->c_connid, rc ));
1152 #else
1153                         Debug( LDAP_DEBUG_TRACE,
1154                                 "connection_read(%d): TLS accept error "
1155                                 "error=%d id=%lu, closing\n",
1156                                 s, rc, c->c_connid );
1157 #endif
1158                         c->c_needs_tls_accept = 0;
1159                         /* connections_mutex and c_mutex are locked */
1160                         connection_closing( c );
1161
1162 #if 0
1163                         /* Drain input before close, to allow SSL error codes
1164                          * to propagate to client. */
1165                         FD_ZERO(&rfd);
1166                         FD_SET(s, &rfd);
1167                         for (rc=1; rc>0;)
1168                         {
1169                             tv.tv_sec = 1;
1170                             tv.tv_usec = 0;
1171                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1172                             if (rc == 1)
1173                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1174                                     NULL);
1175                         }
1176 #endif
1177                         connection_close( c );
1178
1179                 } else if ( rc == 0 ) {
1180                         void *ssl;
1181                         struct berval authid = { 0, NULL };
1182
1183                         c->c_needs_tls_accept = 0;
1184
1185                         /* we need to let SASL know */
1186                         ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1187
1188                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1189                         if( c->c_tls_ssf > c->c_ssf ) {
1190                                 c->c_ssf = c->c_tls_ssf;
1191                         }
1192
1193                         rc = dnX509peerNormalize( ssl, &authid );
1194                         if ( rc != LDAP_SUCCESS ) {
1195 #ifdef NEW_LOGGING
1196                                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1197                                 "connection_read: conn %lu unable to get TLS client DN, error %d\n",
1198                                         c->c_connid, rc));
1199 #else
1200                                 Debug( LDAP_DEBUG_TRACE,
1201                                 "connection_read(%d): unable to get TLS client DN "
1202                                 "error=%d id=%lu\n",
1203                                 s, rc, c->c_connid );
1204 #endif
1205                         }
1206                         slap_sasl_external( c, c->c_tls_ssf, authid.bv_val );
1207                         if ( authid.bv_val )    free( authid.bv_val );
1208                 }
1209                 connection_return( c );
1210                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1211                 return 0;
1212         }
1213 #endif
1214
1215 #ifdef HAVE_CYRUS_SASL
1216         if ( c->c_sasl_layers ) {
1217                 c->c_sasl_layers = 0;
1218
1219                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1220
1221                 if( rc != LDAP_SUCCESS ) {
1222 #ifdef NEW_LOGGING
1223                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1224                                    "connection_read: conn %lu SASL install error %d, closing\n",
1225                                    c->c_connid, rc ));
1226 #else
1227                         Debug( LDAP_DEBUG_TRACE,
1228                                 "connection_read(%d): SASL install error "
1229                                 "error=%d id=%lu, closing\n",
1230                                 s, rc, c->c_connid );
1231 #endif
1232                         /* connections_mutex and c_mutex are locked */
1233                         connection_closing( c );
1234                         connection_close( c );
1235                         connection_return( c );
1236                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1237                         return 0;
1238                 }
1239         }
1240 #endif
1241
1242 #define CONNECTION_INPUT_LOOP 1
1243
1244 #ifdef DATA_READY_LOOP
1245         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1246 #elif CONNECTION_INPUT_LOOP
1247         while(!rc)
1248 #endif
1249         {
1250                 /* How do we do this without getting into a busy loop ? */
1251                 rc = connection_input( c );
1252         }
1253
1254         if( rc < 0 ) {
1255 #ifdef NEW_LOGGING
1256                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1257                            "connection_read: conn %lu  input error %d, closing.\n",
1258                            c->c_connid, rc ));
1259 #else
1260                 Debug( LDAP_DEBUG_TRACE,
1261                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1262                         s, rc, c->c_connid );
1263 #endif
1264                 /* connections_mutex and c_mutex are locked */
1265                 connection_closing( c );
1266                 connection_close( c );
1267                 connection_return( c );
1268                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1269                 return 0;
1270         }
1271
1272         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1273                 slapd_set_read( s, 1 );
1274         }
1275
1276         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1277                 slapd_set_write( s, 1 );
1278         }
1279
1280         connection_return( c );
1281         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1282         return 0;
1283 }
1284
1285 static int
1286 connection_input(
1287     Connection *conn
1288 )
1289 {
1290         Operation *op;
1291         ber_tag_t       tag;
1292         ber_len_t       len;
1293         ber_int_t       msgid;
1294         BerElement      *ber;
1295 #ifdef LDAP_CONNECTIONLESS
1296         Sockaddr        peeraddr;
1297         char            *cdn = NULL;
1298 #endif
1299
1300         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1301             == NULL ) {
1302 #ifdef NEW_LOGGING
1303                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1304                            "connection_input: conn %lu  ber_alloc failed.\n",
1305                            conn->c_connid ));
1306 #else
1307                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1308 #endif
1309                 return -1;
1310         }
1311
1312         errno = 0;
1313
1314 #ifdef LDAP_CONNECTIONLESS
1315         if (conn->c_is_udp)
1316         {
1317                 char    peername[sizeof("IP=255.255.255.255:65336")];
1318                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1319                         sizeof(struct sockaddr));
1320                 if (len != sizeof(struct sockaddr))
1321                         return 1;
1322                 sprintf( peername, "IP=%s:%d",
1323                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1324                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1325                 Statslog( LDAP_DEBUG_STATS,
1326                         "conn=%lu UDP request from %s (%s) accepted.\n",
1327                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1328         }
1329 #endif
1330         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1331         if ( tag != LDAP_TAG_MESSAGE ) {
1332                 int err = errno;
1333                 ber_socket_t    sd;
1334
1335                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1336
1337 #ifdef NEW_LOGGING
1338                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1339                            "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1340                            conn->c_connid, err, sock_errstr(err) ));
1341 #else
1342                 Debug( LDAP_DEBUG_TRACE,
1343                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1344                         sd, err, sock_errstr(err) );
1345 #endif
1346                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1347                         /* log, close and send error */
1348                         ber_free( conn->c_currentber, 1 );
1349                         conn->c_currentber = NULL;
1350
1351                         return -2;
1352                 }
1353                 return 1;
1354         }
1355
1356         ber = conn->c_currentber;
1357         conn->c_currentber = NULL;
1358
1359         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1360                 /* log, close and send error */
1361 #ifdef NEW_LOGGING
1362                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1363                            "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1364                            conn->c_connid, tag ));
1365 #else
1366                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1367                     0 );
1368 #endif
1369                 ber_free( ber, 1 );
1370                 return -1;
1371         }
1372
1373         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1374                 /* log, close and send error */
1375 #ifdef NEW_LOGGING
1376                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1377                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1378                            conn->c_connid, tag ));
1379 #else
1380                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1381                     0 );
1382 #endif
1383                 ber_free( ber, 1 );
1384
1385                 return -1;
1386         }
1387
1388 #ifdef LDAP_CONNECTIONLESS
1389         if (conn->c_is_udp) {
1390                 if (tag == LBER_OCTETSTRING) {
1391                         ber_get_stringa( ber, &cdn );
1392                         tag = ber_peek_tag(ber, &len);
1393                 }
1394                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1395 #ifdef NEW_LOGGING
1396                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1397                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1398                                conn->c_connid, tag ));
1399 #else
1400                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1401                         0 );
1402 #endif
1403                     ber_free( ber, 1 );
1404                     return 0;
1405                 }
1406         }
1407 #endif
1408         if(tag == LDAP_REQ_BIND) {
1409                 /* immediately abandon all exiting operations upon BIND */
1410                 connection_abandon( conn );
1411         }
1412
1413         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1414
1415         op->vrFilter = NULL;
1416
1417         op->o_pagedresults_state = conn->c_pagedresults_state;
1418
1419 #ifdef LDAP_CONNECTIONLESS
1420         op->o_peeraddr = peeraddr;
1421         if (cdn) {
1422             ber_str2bv( cdn, 0, 1, &op->o_dn );
1423             op->o_protocol = LDAP_VERSION2;
1424         }
1425 #endif
1426         if ( conn->c_conn_state == SLAP_C_BINDING
1427                 || conn->c_conn_state == SLAP_C_CLOSING )
1428         {
1429 #ifdef NEW_LOGGING
1430                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1431                            "connection_input: conn %lu  deferring operation\n",
1432                            conn->c_connid ));
1433 #else
1434                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1435 #endif
1436                 conn->c_n_ops_pending++;
1437                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1438
1439         } else {
1440                 conn->c_n_ops_executing++;
1441                 connection_op_activate( conn, op );
1442         }
1443
1444 #ifdef NO_THREADS
1445         if ( conn->c_struct_state != SLAP_C_USED ) {
1446                 /* connection must have got closed underneath us */
1447                 return 1;
1448         }
1449 #endif
1450         assert( conn->c_struct_state == SLAP_C_USED );
1451
1452         return 0;
1453 }
1454
1455 static int
1456 connection_resched( Connection *conn )
1457 {
1458         Operation *op;
1459
1460         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1461                 int rc;
1462                 ber_socket_t    sd;
1463                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1464
1465                 /* us trylock to avoid possible deadlock */
1466                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1467
1468                 if( rc ) {
1469 #ifdef NEW_LOGGING
1470                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1471                                    "connection_resched: conn %lu  reaquiring locks.\n",
1472                                    conn->c_connid ));
1473 #else
1474                         Debug( LDAP_DEBUG_TRACE,
1475                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1476                                 conn->c_connid, sd, 0 );
1477 #endif
1478                         /*
1479                          * reaquire locks in the right order...
1480                          * this may allow another thread to close this connection,
1481                          * so recheck state below.
1482                          */
1483                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1484                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1485                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1486                 }
1487
1488                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1489 #ifdef NEW_LOGGING
1490                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1491                                    "connection_resched: conn %lu  closed by other thread.\n",
1492                                    conn->c_connid ));
1493 #else
1494                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1495                                 "closed by other thread conn=%lu sd=%d\n",
1496                                 conn->c_connid, sd, 0 );
1497 #endif
1498                 } else {
1499 #ifdef NEW_LOGGING
1500                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1501                                    "connection_resched: conn %lu  attempting closing.\n",
1502                                    conn->c_connid ));
1503 #else
1504                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1505                                 "attempting closing conn=%lu sd=%d\n",
1506                                 conn->c_connid, sd, 0 );
1507 #endif
1508                         connection_close( conn );
1509                 }
1510
1511                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1512                 return 0;
1513         }
1514
1515         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1516                 /* other states need different handling */
1517                 return 0;
1518         }
1519
1520         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1521                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1522                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1523                 /* pending operations should not be marked for abandonment */
1524                 assert(!op->o_abandon);
1525
1526                 conn->c_n_ops_pending--;
1527                 conn->c_n_ops_executing++;
1528
1529                 connection_op_activate( conn, op );
1530
1531                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1532                         break;
1533                 }
1534         }
1535         return 0;
1536 }
1537
1538 static int connection_op_activate( Connection *conn, Operation *op )
1539 {
1540         struct co_arg *arg;
1541         int status;
1542         ber_tag_t tag = op->o_tag;
1543
1544         if(tag == LDAP_REQ_BIND) {
1545                 conn->c_conn_state = SLAP_C_BINDING;
1546         }
1547
1548         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1549         arg->co_conn = conn;
1550         arg->co_op = op;
1551
1552         if (!arg->co_op->o_dn.bv_len) {
1553             arg->co_op->o_authz = conn->c_authz;
1554             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1555                 conn->c_dn.bv_val : "" );
1556             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1557                 conn->c_ndn.bv_val : "" );
1558         }
1559         arg->co_op->o_authtype = conn->c_authtype;
1560         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1561
1562         if (!arg->co_op->o_protocol) {
1563             arg->co_op->o_protocol = conn->c_protocol
1564                 ? conn->c_protocol : LDAP_VERSION3;
1565         }
1566         arg->co_op->o_connid = conn->c_connid;
1567
1568         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1569
1570         status = ldap_pvt_thread_pool_submit( &connection_pool,
1571                 connection_operation, (void *) arg );
1572
1573         if ( status != 0 ) {
1574 #ifdef NEW_LOGGING
1575                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1576                            "connection_op_activate: conn %lu     thread pool submit failed.\n",
1577                            conn->c_connid ));
1578 #else
1579                 Debug( LDAP_DEBUG_ANY,
1580                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1581 #endif
1582                 /* should move op to pending list */
1583         }
1584
1585         return status;
1586 }
1587
1588 int connection_write(ber_socket_t s)
1589 {
1590         Connection *c;
1591         assert( connections != NULL );
1592
1593         ldap_pvt_thread_mutex_lock( &connections_mutex );
1594
1595         c = connection_get( s );
1596
1597         slapd_clr_write( s, 0);
1598
1599         if( c == NULL ) {
1600 #ifdef NEW_LOGGING
1601                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1602                            "connection_write: sock %ld  no connection!\n",(long)s));
1603 #else
1604                 Debug( LDAP_DEBUG_ANY,
1605                         "connection_write(%ld): no connection!\n",
1606                         (long) s, 0, 0 );
1607 #endif
1608                 slapd_remove(s, 0);
1609                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1610                 return -1;
1611         }
1612
1613         c->c_n_write++;
1614
1615 #ifdef NEW_LOGGING
1616         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1617                    "connection_write conn %lu  waking output.\n",
1618                    c->c_connid ));
1619 #else
1620         Debug( LDAP_DEBUG_TRACE,
1621                 "connection_write(%d): waking output for id=%lu\n",
1622                 s, c->c_connid, 0 );
1623 #endif
1624         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1625
1626         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1627                 slapd_set_read( s, 1 );
1628         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1629                 slapd_set_write( s, 1 );
1630         connection_return( c );
1631         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1632         return 0;
1633 }
1634