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/signal.h>
  15 #include <ac/string.h>
  16 #include <ac/time.h>
  17 #include <ac/unistd.h>
  18
  19 #include "ldap_pvt.h"
  20 #include "lutil.h"
  21 #include "slap.h"
  22
  23 /* protected by connections_mutex */
  24 static ldap_pvt_thread_mutex_t connections_mutex;
  25 static Connection *connections = NULL;
  26 static unsigned long conn_nextid = 0;
  27
  28 /* structure state (protected by connections_mutex) */
  29 #define SLAP_C_UNINITIALIZED    0x00    /* MUST BE ZERO (0) */
  30 #define SLAP_C_UNUSED                   0x01
  31 #define SLAP_C_USED                             0x02
  32
  33 /* connection state (protected by c_mutex ) */
  34 #define SLAP_C_INVALID                  0x00    /* MUST BE ZERO (0) */
  35 #define SLAP_C_INACTIVE                 0x01    /* zero threads */
  36 #define SLAP_C_ACTIVE                   0x02    /* one or more threads */
  37 #define SLAP_C_BINDING                  0x03    /* binding */
  38 #define SLAP_C_CLOSING                  0x04    /* closing */
  39
  40 const char *
  41 connection_state2str( int state )
  42 {
  43         switch( state ) {
  44         case SLAP_C_INVALID:    return "!";
  45         case SLAP_C_INACTIVE:   return "|";
  46         case SLAP_C_ACTIVE:             return "";
  47         case SLAP_C_BINDING:    return "B";
  48         case SLAP_C_CLOSING:    return "C";
  49         }
  50
  51         return "?";
  52 }
  53
  54 static Connection* connection_get( ber_socket_t s );
  55
  56 static int connection_input( Connection *c );
  57 static void connection_close( Connection *c );
  58
  59 static int connection_op_activate( Connection *conn, Operation *op );
  60 static int connection_resched( Connection *conn );
  61 static void connection_abandon( Connection *conn );
  62 static void connection_destroy( Connection *c );
  63
  64 struct co_arg {
  65         Connection      *co_conn;
  66         Operation       *co_op;
  67 };
  68
  69 /*
  70  * Initialize connection management infrastructure.
  71  */
  72 int connections_init(void)
  73 {
  74         assert( connections == NULL );
  75
  76         if( connections != NULL) {
  77 #ifdef NEW_LOGGING
  78                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
  79                            "connections_init:  already initialized.\n" ));
  80 #else
  81                 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
  82                         0, 0, 0 );
  83 #endif
  84                 return -1;
  85         }
  86
  87         /* should check return of every call */
  88         ldap_pvt_thread_mutex_init( &connections_mutex );
  89
  90         connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
  91
  92         if( connections == NULL ) {
  93 #ifdef NEW_LOGGING
  94                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
  95                            "connections_init: allocation (%d * %ld) of connection array failed\n",
  96                            dtblsize, (long) sizeof(Connection) ));
  97 #else
  98                 Debug( LDAP_DEBUG_ANY,
  99                         "connections_init: allocation (%d*%ld) of connection array failed\n",
 100                         dtblsize, (long) sizeof(Connection), 0 );
 101 #endif
 102                 return -1;
 103         }
 104
 105     assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
 106     assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
 107
 108         /*
 109          * per entry initialization of the Connection array initialization
 110          * will be done by connection_init()
 111          */
 112
 113         return 0;
 114 }
 115
 116 /*
 117  * Destroy connection management infrastructure.
 118  */
 119 int connections_destroy(void)
 120 {
 121         ber_socket_t i;
 122
 123         /* should check return of every call */
 124
 125         if( connections == NULL) {
 126 #ifdef NEW_LOGGING
 127                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 128                            "connections_destroy: nothing to destroy.\n"));
 129 #else
 130                 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
 131                         0, 0, 0 );
 132 #endif
 133                 return -1;
 134         }
 135
 136         for ( i = 0; i < dtblsize; i++ ) {
 137                 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
 138                         ber_sockbuf_free( connections[i].c_sb );
 139                         ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
 140                         ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
 141                         ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
 142                 }
 143         }
 144
 145         free( connections );
 146         connections = NULL;
 147
 148         ldap_pvt_thread_mutex_destroy( &connections_mutex );
 149         return 0;
 150 }
 151
 152 /*
 153  * shutdown all connections
 154  */
 155 int connections_shutdown(void)
 156 {
 157         ber_socket_t i;
 158
 159         ldap_pvt_thread_mutex_lock( &connections_mutex );
 160
 161         for ( i = 0; i < dtblsize; i++ ) {
 162                 if( connections[i].c_struct_state != SLAP_C_USED ) {
 163                         continue;
 164                 }
 165
 166                 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
 167
 168                 /* connections_mutex and c_mutex are locked */
 169                 connection_closing( &connections[i] );
 170                 connection_close( &connections[i] );
 171
 172                 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
 173         }
 174
 175         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * Timeout idle connections.
 182  */
 183 int connections_timeout_idle(time_t now)
 184 {
 185         int i = 0;
 186         int connindex;
 187         Connection* c;
 188
 189         for( c = connection_first( &connindex );
 190                 c != NULL;
 191                 c = connection_next( c, &connindex ) )
 192         {
 193                 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
 194                         /* close it */
 195                         connection_closing( c );
 196                         connection_close( c );
 197                         i++;
 198                 }
 199         }
 200         connection_done( c );
 201
 202         return i;
 203 }
 204
 205 static Connection* connection_get( ber_socket_t s )
 206 {
 207         /* connections_mutex should be locked by caller */
 208
 209         Connection *c;
 210
 211 #ifdef NEW_LOGGING
 212         LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
 213                    "connection_get: socket %ld\n", (long)s ));
 214 #else
 215         Debug( LDAP_DEBUG_ARGS,
 216                 "connection_get(%ld)\n",
 217                 (long) s, 0, 0 );
 218 #endif
 219
 220         assert( connections != NULL );
 221
 222         if(s == AC_SOCKET_INVALID) {
 223                 return NULL;
 224         }
 225
 226 #ifndef HAVE_WINSOCK
 227         c = &connections[s];
 228
 229         assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
 230
 231 #else
 232         c = NULL;
 233         {
 234                 ber_socket_t i, sd;
 235
 236                 for(i=0; i<dtblsize; i++) {
 237                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 238                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 239                                 assert( connections[i].c_sb == 0 );
 240                                 break;
 241                         }
 242
 243                         ber_sockbuf_ctrl( connections[i].c_sb,
 244                                 LBER_SB_OPT_GET_FD, &sd );
 245
 246                         if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 247                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 248                                 assert( sd == AC_SOCKET_INVALID );
 249                                 continue;
 250                         }
 251
 252                         /* state can actually change from used -> unused by resched,
 253                          * so don't assert details here.
 254                          */
 255
 256                         if( sd == s ) {
 257                                 c = &connections[i];
 258                                 break;
 259                         }
 260                 }
 261         }
 262 #endif
 263
 264         if( c != NULL ) {
 265                 ber_socket_t    sd;
 266
 267                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 268
 269                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 270                 if( c->c_struct_state != SLAP_C_USED ) {
 271                         /* connection must have been closed due to resched */
 272
 273                         assert( c->c_conn_state == SLAP_C_INVALID );
 274                         assert( sd == AC_SOCKET_INVALID );
 275
 276 #ifdef NEW_LOGGING
 277                         LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
 278                                    "connection_get:  connection %d not used\n", s ));
 279 #else
 280                         Debug( LDAP_DEBUG_TRACE,
 281                                 "connection_get(%d): connection not used\n",
 282                                 s, 0, 0 );
 283 #endif
 284
 285                         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 286                         return NULL;
 287                 }
 288
 289 #ifdef NEW_LOGGING
 290                 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 291                            "connection_get: get for %d got connid %lu\n", s, c->c_connid ));
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%lu\n",
 295                         s, c->c_connid, 0 );
 296 #endif
 297
 298                 c->c_n_get++;
 299
 300                 assert( c->c_struct_state == SLAP_C_USED );
 301                 assert( c->c_conn_state != SLAP_C_INVALID );
 302                 assert( sd != AC_SOCKET_INVALID );
 303
 304 #ifdef SLAPD_MONITOR
 305                 c->c_activitytime = slap_get_time();
 306 #else
 307                 if( global_idletimeout > 0 ) {
 308                         c->c_activitytime = slap_get_time();
 309                 }
 310 #endif
 311         }
 312
 313         return c;
 314 }
 315
 316 static void connection_return( Connection *c )
 317 {
 318         ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 319 }
 320
 321 long connection_init(
 322         ber_socket_t s,
 323         const char* url,
 324         const char* dnsname,
 325         const char* peername,
 326         const char* sockname,
 327         int tls_udp_option,
 328         slap_ssf_t ssf,
 329         const char *authid )
 330 {
 331         unsigned long id;
 332         Connection *c;
 333
 334         assert( connections != NULL );
 335
 336         assert( dnsname != NULL );
 337         assert( peername != NULL );
 338         assert( sockname != NULL );
 339
 340 #ifndef HAVE_TLS
 341         assert( tls_udp_option != 1 );
 342 #endif
 343
 344         if( s == AC_SOCKET_INVALID ) {
 345 #ifdef NEW_LOGGING
 346                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 347                            "connection_init: init of socket %ld invalid.\n", (long)s ));
 348 #else
 349                 Debug( LDAP_DEBUG_ANY,
 350                        "connection_init(%ld): invalid.\n",
 351                        (long) s, 0, 0 );
 352 #endif
 353                 return -1;
 354         }
 355
 356         assert( s >= 0 );
 357 #ifndef HAVE_WINSOCK
 358         assert( s < dtblsize );
 359 #endif
 360
 361         ldap_pvt_thread_mutex_lock( &connections_mutex );
 362
 363 #ifndef HAVE_WINSOCK
 364         c = &connections[s];
 365
 366 #else
 367         {
 368                 ber_socket_t    i;
 369
 370                 c = NULL;
 371
 372         for( i=0; i < dtblsize; i++) {
 373                 ber_socket_t    sd;
 374
 375             if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 376                 assert( connections[i].c_sb == 0 );
 377                 c = &connections[i];
 378                 break;
 379             }
 380
 381                         sd = AC_SOCKET_INVALID;
 382                         if (connections[i].c_sb != NULL)
 383                         ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
 384
 385             if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
 386                 assert( sd == AC_SOCKET_INVALID );
 387                 c = &connections[i];
 388                 break;
 389             }
 390
 391             assert( connections[i].c_struct_state == SLAP_C_USED );
 392             assert( connections[i].c_conn_state != SLAP_C_INVALID );
 393             assert( sd != AC_SOCKET_INVALID );
 394         }
 395
 396         if( c == NULL ) {
 397 #ifdef NEW_LOGGING
 398                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 399                            "connection_init: skt %d      connection table full (%d/%d)\n",
 400                            s, i, dtblsize ));
 401 #else
 402                 Debug( LDAP_DEBUG_ANY,
 403                                 "connection_init(%d): connection table full (%d/%d)\n",
 404                                 s, i, dtblsize);
 405 #endif
 406             ldap_pvt_thread_mutex_unlock( &connections_mutex );
 407             return -1;
 408         }
 409     }
 410 #endif
 411
 412     assert( c != NULL );
 413
 414         if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
 415                 c->c_authmech.bv_val = NULL;
 416                 c->c_authmech.bv_len = 0;
 417                 c->c_dn.bv_val = NULL;
 418                 c->c_dn.bv_len = 0;
 419                 c->c_ndn.bv_val = NULL;
 420                 c->c_ndn.bv_len = 0;
 421                 c->c_cdn.bv_val = NULL;
 422                 c->c_cdn.bv_len = 0;
 423                 c->c_groups = NULL;
 424
 425                 c->c_listener_url.bv_val = NULL;
 426                 c->c_listener_url.bv_len = 0;
 427                 c->c_peer_domain.bv_val = NULL;
 428                 c->c_peer_domain.bv_len = 0;
 429                 c->c_peer_name.bv_val = NULL;
 430                 c->c_peer_name.bv_len = 0;
 431                 c->c_sock_name.bv_val = NULL;
 432                 c->c_sock_name.bv_len = 0;
 433
 434                 LDAP_STAILQ_INIT(&c->c_ops);
 435                 LDAP_STAILQ_INIT(&c->c_pending_ops);
 436
 437                 c->c_sasl_bind_mech.bv_val = NULL;
 438                 c->c_sasl_bind_mech.bv_len = 0;
 439                 c->c_sasl_context = NULL;
 440                 c->c_sasl_extra = 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_cdn.bv_val == NULL );
 466     assert( c->c_groups == NULL );
 467     assert( c->c_listener_url.bv_val == NULL );
 468     assert( c->c_peer_domain.bv_val == NULL );
 469     assert( c->c_peer_name.bv_val == NULL );
 470     assert( c->c_sock_name.bv_val == NULL );
 471     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 472     assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
 473         assert( c->c_sasl_bind_mech.bv_val == NULL );
 474         assert( c->c_sasl_context == NULL );
 475         assert( c->c_sasl_extra == NULL );
 476         assert( c->c_currentber == NULL );
 477
 478         ber_str2bv( url, 0, 1, &c->c_listener_url );
 479         ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
 480         ber_str2bv( peername, 0, 1, &c->c_peer_name );
 481         ber_str2bv( sockname, 0, 1, &c->c_sock_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         {
 507                 c->c_is_udp = 1;
 508 #ifdef LDAP_DEBUG
 509         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 510                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
 511 #endif
 512         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
 513                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 514         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
 515                 LBER_SBIOD_LEVEL_PROVIDER, NULL );
 516         } else
 517 #endif
 518         {
 519 #ifdef LDAP_DEBUG
 520         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 521                 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
 522 #endif
 523         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
 524                 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
 525         }
 526
 527 #ifdef LDAP_DEBUG
 528         ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
 529                 INT_MAX, (void*)"ldap_" );
 530 #endif
 531
 532         if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
 533                 c /* non-NULL */ ) < 0 )
 534         {
 535 #ifdef NEW_LOGGING
 536                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 537                            "connection_init: conn %lu  set nonblocking failed\n",
 538                            c->c_connid ));
 539 #else
 540                 Debug( LDAP_DEBUG_ANY,
 541                         "connection_init(%d, %s): set nonblocking failed\n",
 542                         s, c->c_peer_name.bv_val, 0 );
 543 #endif
 544         }
 545
 546     id = c->c_connid = conn_nextid++;
 547
 548     c->c_conn_state = SLAP_C_INACTIVE;
 549     c->c_struct_state = SLAP_C_USED;
 550
 551         c->c_ssf = c->c_transport_ssf = ssf;
 552         c->c_tls_ssf = 0;
 553
 554 #ifdef HAVE_TLS
 555     if ( tls_udp_option == 1 ) {
 556             c->c_is_tls = 1;
 557             c->c_needs_tls_accept = 1;
 558     } else {
 559             c->c_is_tls = 0;
 560             c->c_needs_tls_accept = 0;
 561     }
 562 #endif
 563
 564         slap_sasl_open( c );
 565         slap_sasl_external( c, ssf, authid );
 566
 567     ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 568     ldap_pvt_thread_mutex_unlock( &connections_mutex );
 569
 570     backend_connection_init(c);
 571
 572     return id;
 573 }
 574
 575 void connection2anonymous( Connection *c )
 576 {
 577     assert( connections != NULL );
 578     assert( c != NULL );
 579
 580         {
 581                 ber_len_t max = sockbuf_max_incoming;
 582                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 583         }
 584
 585         if(c->c_authmech.bv_val != NULL ) {
 586                 free(c->c_authmech.bv_val);
 587                 c->c_authmech.bv_val = NULL;
 588         }
 589         c->c_authmech.bv_len = 0;
 590
 591     if(c->c_dn.bv_val != NULL) {
 592         free(c->c_dn.bv_val);
 593         c->c_dn.bv_val = NULL;
 594     }
 595     c->c_dn.bv_len = 0;
 596     if(c->c_ndn.bv_val != NULL) {
 597         free(c->c_ndn.bv_val);
 598         c->c_ndn.bv_val = NULL;
 599     }
 600     c->c_ndn.bv_len = 0;
 601
 602         if(c->c_cdn.bv_val != NULL) {
 603                 free(c->c_cdn.bv_val);
 604                 c->c_cdn.bv_val = NULL;
 605         }
 606         c->c_cdn.bv_len = 0;
 607
 608         c->c_authc_backend = NULL;
 609         c->c_authz_backend = NULL;
 610
 611     {
 612         GroupAssertion *g, *n;
 613         for (g = c->c_groups; g; g=n)
 614         {
 615             n = g->ga_next;
 616             free(g);
 617         }
 618         c->c_groups = NULL;
 619     }
 620
 621 }
 622
 623 static void
 624 connection_destroy( Connection *c )
 625 {
 626         /* note: connections_mutex should be locked by caller */
 627     ber_socket_t        sd;
 628     unsigned long       connid;
 629
 630     assert( connections != NULL );
 631     assert( c != NULL );
 632     assert( c->c_struct_state != SLAP_C_UNUSED );
 633     assert( c->c_conn_state != SLAP_C_INVALID );
 634     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 635
 636     /* only for stats (print -1 as "%lu" may give unexpected results ;) */
 637     connid = c->c_connid;
 638
 639     backend_connection_destroy(c);
 640
 641     c->c_protocol = 0;
 642     c->c_connid = -1;
 643
 644     c->c_activitytime = c->c_starttime = 0;
 645
 646         connection2anonymous( c );
 647
 648         if(c->c_listener_url.bv_val != NULL) {
 649                 free(c->c_listener_url.bv_val);
 650                 c->c_listener_url.bv_val = NULL;
 651         }
 652         c->c_listener_url.bv_len = 0;
 653
 654         if(c->c_peer_domain.bv_val != NULL) {
 655                 free(c->c_peer_domain.bv_val);
 656                 c->c_peer_domain.bv_val = NULL;
 657         }
 658         c->c_peer_domain.bv_len = 0;
 659         if(c->c_peer_name.bv_val != NULL) {
 660 #ifdef LDAP_PF_LOCAL
 661                 /*
 662                  * If peer was a domain socket, unlink. Mind you,
 663                  * they may be un-named. Should we leave this to
 664                  * the client?
 665                  */
 666                 if (strncmp(c->c_peer_name.bv_val, "PATH=",
 667                                         sizeof("PATH=") - 1) == 0) {
 668                         char *path = c->c_peer_name.bv_val
 669                                 + sizeof("PATH=") - 1;
 670                         if (path[0] != '\0') {
 671                                 (void)unlink(path);
 672                         }
 673                 }
 674 #endif /* LDAP_PF_LOCAL */
 675
 676                 free(c->c_peer_name.bv_val);
 677                 c->c_peer_name.bv_val = NULL;
 678         }
 679         c->c_peer_name.bv_len = 0;
 680         if(c->c_sock_name.bv_val != NULL) {
 681                 free(c->c_sock_name.bv_val);
 682                 c->c_sock_name.bv_val = NULL;
 683         }
 684         c->c_sock_name.bv_len = 0;
 685
 686         c->c_sasl_bind_in_progress = 0;
 687         if(c->c_sasl_bind_mech.bv_val != NULL) {
 688                 free(c->c_sasl_bind_mech.bv_val);
 689                 c->c_sasl_bind_mech.bv_val = NULL;
 690         }
 691         c->c_sasl_bind_mech.bv_len = 0;
 692
 693         slap_sasl_close( c );
 694
 695         if ( c->c_currentber != NULL ) {
 696                 ber_free( c->c_currentber, 1 );
 697                 c->c_currentber = NULL;
 698         }
 699
 700         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 701         if ( sd != AC_SOCKET_INVALID ) {
 702                 slapd_remove( sd, 0 );
 703
 704                 Statslog( LDAP_DEBUG_STATS,
 705                     "conn=%lu fd=%d closed\n",
 706                         connid, sd, 0, 0, 0 );
 707         }
 708
 709         ber_sockbuf_free( c->c_sb );
 710
 711         c->c_sb = ber_sockbuf_alloc( );
 712
 713         {
 714                 ber_len_t max = sockbuf_max_incoming;
 715                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 716         }
 717
 718     c->c_conn_state = SLAP_C_INVALID;
 719     c->c_struct_state = SLAP_C_UNUSED;
 720 }
 721
 722 int connection_state_closing( Connection *c )
 723 {
 724         /* c_mutex must be locked by caller */
 725
 726         int state;
 727         assert( c != NULL );
 728         assert( c->c_struct_state == SLAP_C_USED );
 729
 730         state = c->c_conn_state;
 731
 732         assert( state != SLAP_C_INVALID );
 733
 734         return state == SLAP_C_CLOSING;
 735 }
 736
 737 static void connection_abandon( Connection *c )
 738 {
 739         /* c_mutex must be locked by caller */
 740
 741         Operation *o;
 742
 743         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 744                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 745                 o->o_abandon = 1;
 746                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 747         }
 748
 749         /* remove pending operations */
 750         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 751                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 752                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 753                 slap_op_free( o );
 754         }
 755 }
 756
 757 void connection_closing( Connection *c )
 758 {
 759         assert( connections != NULL );
 760         assert( c != NULL );
 761         assert( c->c_struct_state == SLAP_C_USED );
 762         assert( c->c_conn_state != SLAP_C_INVALID );
 763
 764         /* c_mutex must be locked by caller */
 765
 766         if( c->c_conn_state != SLAP_C_CLOSING ) {
 767                 ber_socket_t    sd;
 768
 769                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 770 #ifdef NEW_LOGGING
 771                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 772                            "connection_closing: conn %lu readying socket %d for close.\n",
 773                            c->c_connid, sd ));
 774 #else
 775                 Debug( LDAP_DEBUG_TRACE,
 776                         "connection_closing: readying conn=%lu sd=%d for close\n",
 777                         c->c_connid, sd, 0 );
 778 #endif
 779                 /* update state to closing */
 780                 c->c_conn_state = SLAP_C_CLOSING;
 781
 782                 /* don't listen on this port anymore */
 783                 slapd_clr_read( sd, 1 );
 784
 785                 /* abandon active operations */
 786                 connection_abandon( c );
 787
 788                 /* wake write blocked operations */
 789                 slapd_clr_write( sd, 1 );
 790                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 791         }
 792 }
 793
 794 static void connection_close( Connection *c )
 795 {
 796         ber_socket_t    sd;
 797
 798         assert( connections != NULL );
 799         assert( c != NULL );
 800         assert( c->c_struct_state == SLAP_C_USED );
 801         assert( c->c_conn_state == SLAP_C_CLOSING );
 802
 803         /* note: connections_mutex and c_mutex should be locked by caller */
 804
 805         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 806         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 807 #ifdef NEW_LOGGING
 808                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 809                            "connection_close: conn %lu  deferring sd %d\n",
 810                            c->c_connid, sd ));
 811 #else
 812                 Debug( LDAP_DEBUG_TRACE,
 813                         "connection_close: deferring conn=%lu sd=%d\n",
 814                         c->c_connid, sd, 0 );
 815 #endif
 816                 return;
 817         }
 818
 819 #ifdef NEW_LOGGING
 820         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 821                    "connection_close: conn %lu  sd %d\n",
 822                    c->c_connid, sd ));
 823 #else
 824         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
 825                 c->c_connid, sd, 0 );
 826 #endif
 827         connection_destroy( c );
 828 }
 829
 830 unsigned long connections_nextid(void)
 831 {
 832         unsigned long id;
 833         assert( connections != NULL );
 834
 835         ldap_pvt_thread_mutex_lock( &connections_mutex );
 836
 837         id = conn_nextid;
 838
 839         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 840
 841         return id;
 842 }
 843
 844 Connection* connection_first( ber_socket_t *index )
 845 {
 846         assert( connections != NULL );
 847         assert( index != NULL );
 848
 849         ldap_pvt_thread_mutex_lock( &connections_mutex );
 850
 851         *index = 0;
 852
 853         return connection_next(NULL, index);
 854 }
 855
 856 Connection* connection_next( Connection *c, ber_socket_t *index )
 857 {
 858         assert( connections != NULL );
 859         assert( index != NULL );
 860         assert( *index <= dtblsize );
 861
 862         if( c != NULL ) {
 863                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 864         }
 865
 866         c = NULL;
 867
 868         for(; *index < dtblsize; (*index)++) {
 869                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 870                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 871 #ifndef HAVE_WINSOCK
 872                         continue;
 873 #else
 874                         break;
 875 #endif
 876                 }
 877
 878                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 879                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 880                         c = &connections[(*index)++];
 881                         break;
 882                 }
 883
 884                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 885                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 886         }
 887
 888         if( c != NULL ) {
 889                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 890         }
 891
 892         return c;
 893 }
 894
 895 void connection_done( Connection *c )
 896 {
 897         assert( connections != NULL );
 898
 899         if( c != NULL ) {
 900                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 901         }
 902
 903         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 904 }
 905
 906 /*
 907  * connection_activity - handle the request operation op on connection
 908  * conn.  This routine figures out what kind of operation it is and
 909  * calls the appropriate stub to handle it.
 910  */
 911
 912 static void *
 913 connection_operation( void *arg_v )
 914 {
 915         int rc;
 916         struct co_arg   *arg = arg_v;
 917         ber_tag_t tag = arg->co_op->o_tag;
 918         Connection *conn = arg->co_conn;
 919
 920         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 921         num_ops_initiated++;
 922         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 923
 924         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 925 #ifdef NEW_LOGGING
 926                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 927                            "connection_operation: conn %lu  SASL bind in progress (tag=%ld).\n",
 928                            conn->c_connid, (long)tag ));
 929 #else
 930                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 931                         "error: SASL bind in progress (tag=%ld).\n",
 932                         (long) tag, 0, 0 );
 933 #endif
 934                 send_ldap_result( conn, arg->co_op,
 935                         rc = LDAP_OPERATIONS_ERROR,
 936                         NULL, "SASL bind in progress", NULL, NULL );
 937                 goto operations_error;
 938         }
 939
 940         switch ( tag ) {
 941         case LDAP_REQ_BIND:
 942                 rc = do_bind( conn, arg->co_op );
 943                 break;
 944
 945         case LDAP_REQ_UNBIND:
 946                 rc = do_unbind( conn, arg->co_op );
 947                 break;
 948
 949         case LDAP_REQ_ADD:
 950                 rc = do_add( conn, arg->co_op );
 951                 break;
 952
 953         case LDAP_REQ_DELETE:
 954                 rc = do_delete( conn, arg->co_op );
 955                 break;
 956
 957         case LDAP_REQ_MODRDN:
 958                 rc = do_modrdn( conn, arg->co_op );
 959                 break;
 960
 961         case LDAP_REQ_MODIFY:
 962                 rc = do_modify( conn, arg->co_op );
 963                 break;
 964
 965         case LDAP_REQ_COMPARE:
 966                 rc = do_compare( conn, arg->co_op );
 967                 break;
 968
 969         case LDAP_REQ_SEARCH:
 970                 rc = do_search( conn, arg->co_op );
 971                 break;
 972
 973         case LDAP_REQ_ABANDON:
 974                 rc = do_abandon( conn, arg->co_op );
 975                 break;
 976
 977         case LDAP_REQ_EXTENDED:
 978                 rc = do_extended( conn, arg->co_op );
 979                 break;
 980
 981         default:
 982 #ifdef NEW_LOGGING
 983                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 984                            "connection_operation: conn %lu  unknown LDAP request 0x%lx\n",
 985                            conn->c_connid, tag ));
 986 #else
 987                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 988                     tag, 0, 0 );
 989 #endif
 990                 arg->co_op->o_tag = LBER_ERROR;
 991                 send_ldap_disconnect( conn, arg->co_op,
 992                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 993                 rc = -1;
 994                 break;
 995         }
 996
 997         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 998
 999 operations_error:
1000         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
1001         num_ops_completed++;
1002         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
1003
1004         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1005
1006         conn->c_n_ops_executing--;
1007         conn->c_n_ops_completed++;
1008
1009         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1010         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1011         slap_op_free( arg->co_op );
1012         arg->co_op = NULL;
1013         arg->co_conn = NULL;
1014         free( (char *) arg );
1015         arg = NULL;
1016
1017         switch( tag ) {
1018         case LBER_ERROR:
1019         case LDAP_REQ_UNBIND:
1020                 /* c_mutex is locked */
1021                 connection_closing( conn );
1022                 break;
1023
1024         case LDAP_REQ_BIND:
1025                 conn->c_sasl_bind_in_progress =
1026                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1027
1028                 if( conn->c_conn_state == SLAP_C_BINDING) {
1029                         conn->c_conn_state = SLAP_C_ACTIVE;
1030                 }
1031         }
1032
1033         connection_resched( conn );
1034
1035         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1036
1037         return NULL;
1038 }
1039
1040 int connection_read(ber_socket_t s)
1041 {
1042         int rc = 0;
1043         Connection *c;
1044         assert( connections != NULL );
1045
1046         ldap_pvt_thread_mutex_lock( &connections_mutex );
1047
1048         /* get (locked) connection */
1049         c = connection_get( s );
1050
1051         if( c == NULL ) {
1052 #ifdef NEW_LOGGING
1053                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1054                            "connection_read: sock %ld no connection\n",
1055                            (long)s ));
1056 #else
1057                 Debug( LDAP_DEBUG_ANY,
1058                         "connection_read(%ld): no connection!\n",
1059                         (long) s, 0, 0 );
1060 #endif
1061                 slapd_remove(s, 0);
1062
1063                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1064                 return -1;
1065         }
1066
1067         c->c_n_read++;
1068
1069         if( c->c_conn_state == SLAP_C_CLOSING ) {
1070 #ifdef NEW_LOGGING
1071                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1072                            "connection_read: conn %lu connection closing, ignoring input\n",
1073                            c->c_connid));
1074 #else
1075                 Debug( LDAP_DEBUG_TRACE,
1076                         "connection_read(%d): closing, ignoring input for id=%lu\n",
1077                         s, c->c_connid, 0 );
1078 #endif
1079                 connection_return( c );
1080                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1081                 return 0;
1082         }
1083
1084 #ifdef NEW_LOGGING
1085         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1086                    "connection_read: conn %lu  checking for input.\n", c->c_connid ));
1087 #else
1088         Debug( LDAP_DEBUG_TRACE,
1089                 "connection_read(%d): checking for input on id=%lu\n",
1090                 s, c->c_connid, 0 );
1091 #endif
1092
1093 #ifdef HAVE_TLS
1094         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1095                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1096                 if ( rc < 0 ) {
1097 #if 0 /* required by next #if 0 */
1098                         struct timeval tv;
1099                         fd_set rfd;
1100 #endif
1101
1102 #ifdef NEW_LOGGING
1103                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1104                                    "connection_read: conn %lu  TLS accept error, error %d\n",
1105                                    c->c_connid, rc ));
1106 #else
1107                         Debug( LDAP_DEBUG_TRACE,
1108                                 "connection_read(%d): TLS accept error "
1109                                 "error=%d id=%lu, closing\n",
1110                                 s, rc, c->c_connid );
1111 #endif
1112                         c->c_needs_tls_accept = 0;
1113                         /* connections_mutex and c_mutex are locked */
1114                         connection_closing( c );
1115
1116 #if 0
1117                         /* Drain input before close, to allow SSL error codes
1118                          * to propagate to client. */
1119                         FD_ZERO(&rfd);
1120                         FD_SET(s, &rfd);
1121                         for (rc=1; rc>0;)
1122                         {
1123                             tv.tv_sec = 1;
1124                             tv.tv_usec = 0;
1125                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1126                             if (rc == 1)
1127                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1128                                     NULL);
1129                         }
1130 #endif
1131                         connection_close( c );
1132
1133                 } else if ( rc == 0 ) {
1134                         void *ssl;
1135                         char *authid;
1136
1137                         c->c_needs_tls_accept = 0;
1138
1139                         /* we need to let SASL know */
1140                         ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1141
1142                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1143                         if( c->c_tls_ssf > c->c_ssf ) {
1144                                 c->c_ssf = c->c_tls_ssf;
1145                         }
1146
1147                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1148                         slap_sasl_external( c, c->c_tls_ssf, authid );
1149                 }
1150                 connection_return( c );
1151                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1152                 return 0;
1153         }
1154 #endif
1155
1156 #ifdef HAVE_CYRUS_SASL
1157         if ( c->c_sasl_layers ) {
1158                 c->c_sasl_layers = 0;
1159
1160                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1161
1162                 if( rc != LDAP_SUCCESS ) {
1163 #ifdef NEW_LOGGING
1164                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1165                                    "connection_read: conn %lu SASL install error %d, closing\n",
1166                                    c->c_connid, rc ));
1167 #else
1168                         Debug( LDAP_DEBUG_TRACE,
1169                                 "connection_read(%d): SASL install error "
1170                                 "error=%d id=%lu, closing\n",
1171                                 s, rc, c->c_connid );
1172 #endif
1173                         /* connections_mutex and c_mutex are locked */
1174                         connection_closing( c );
1175                         connection_close( c );
1176                         connection_return( c );
1177                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1178                         return 0;
1179                 }
1180         }
1181 #endif
1182
1183 #define CONNECTION_INPUT_LOOP 1
1184
1185 #ifdef DATA_READY_LOOP
1186         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1187 #elif CONNECTION_INPUT_LOOP
1188         while(!rc)
1189 #endif
1190         {
1191                 /* How do we do this without getting into a busy loop ? */
1192                 rc = connection_input( c );
1193         }
1194
1195         if( rc < 0 ) {
1196 #ifdef NEW_LOGGING
1197                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1198                            "connection_read: conn %lu  input error %d, closing.\n",
1199                            c->c_connid, rc ));
1200 #else
1201                 Debug( LDAP_DEBUG_TRACE,
1202                         "connection_read(%d): input error=%d id=%lu, closing.\n",
1203                         s, rc, c->c_connid );
1204 #endif
1205                 /* connections_mutex and c_mutex are locked */
1206                 connection_closing( c );
1207                 connection_close( c );
1208                 connection_return( c );
1209                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1210                 return 0;
1211         }
1212
1213         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1214                 slapd_set_read( s, 1 );
1215         }
1216
1217         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1218                 slapd_set_write( s, 1 );
1219         }
1220
1221         connection_return( c );
1222         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1223         return 0;
1224 }
1225
1226 static int
1227 connection_input(
1228     Connection *conn
1229 )
1230 {
1231         Operation *op;
1232         ber_tag_t       tag;
1233         ber_len_t       len;
1234         ber_int_t       msgid;
1235         BerElement      *ber;
1236 #ifdef LDAP_CONNECTIONLESS
1237         Sockaddr        peeraddr;
1238         char            *cdn = NULL;
1239 #endif
1240
1241         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1242             == NULL ) {
1243 #ifdef NEW_LOGGING
1244                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1245                            "connection_input: conn %lu  ber_alloc failed.\n",
1246                            conn->c_connid ));
1247 #else
1248                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1249 #endif
1250                 return -1;
1251         }
1252
1253         errno = 0;
1254
1255 #ifdef LDAP_CONNECTIONLESS
1256         if (conn->c_is_udp)
1257         {
1258                 char    peername[sizeof("IP=255.255.255.255:65336")];
1259                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1260                         sizeof(struct sockaddr));
1261                 if (len != sizeof(struct sockaddr))
1262                         return 1;
1263                 sprintf( peername, "IP=%s:%d",
1264                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1265                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1266                 Statslog( LDAP_DEBUG_STATS,
1267                         "conn=%lu UDP request from %s (%s) accepted.\n",
1268                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1269         }
1270 #endif
1271         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1272         if ( tag != LDAP_TAG_MESSAGE ) {
1273                 int err = errno;
1274                 ber_socket_t    sd;
1275
1276                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1277
1278 #ifdef NEW_LOGGING
1279                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1280                            "connection_input: conn %lu  ber_get_next failed, errno %d (%s).\n",
1281                            conn->c_connid, err, sock_errstr(err) ));
1282 #else
1283                 Debug( LDAP_DEBUG_TRACE,
1284                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1285                         sd, err, sock_errstr(err) );
1286 #endif
1287                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1288                         /* log, close and send error */
1289                         ber_free( conn->c_currentber, 1 );
1290                         conn->c_currentber = NULL;
1291
1292                         return -2;
1293                 }
1294                 return 1;
1295         }
1296
1297         ber = conn->c_currentber;
1298         conn->c_currentber = NULL;
1299
1300         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1301                 /* log, close and send error */
1302 #ifdef NEW_LOGGING
1303                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1304                            "connection_input: conn %lu  ber_get_int returns 0x%lx.\n",
1305                            conn->c_connid, tag ));
1306 #else
1307                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1308                     0 );
1309 #endif
1310                 ber_free( ber, 1 );
1311                 return -1;
1312         }
1313
1314         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1315                 /* log, close and send error */
1316 #ifdef NEW_LOGGING
1317                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1318                            "connection_input: conn %lu  ber_peek_tag returns 0x%lx.\n",
1319                            conn->c_connid, tag ));
1320 #else
1321                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1322                     0 );
1323 #endif
1324                 ber_free( ber, 1 );
1325
1326                 return -1;
1327         }
1328
1329 #ifdef LDAP_CONNECTIONLESS
1330         if (conn->c_is_udp) {
1331                 if (tag == LBER_OCTETSTRING) {
1332                         ber_get_stringa( ber, &cdn );
1333                         tag = ber_peek_tag(ber, &len);
1334                 }
1335                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1336 #ifdef NEW_LOGGING
1337                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1338                                "connection_input: conn %lu  invalid req for UDP 0x%lx.\n",
1339                                conn->c_connid, tag ));
1340 #else
1341                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1342                         0 );
1343 #endif
1344                     ber_free( ber, 1 );
1345                     return 0;
1346                 }
1347         }
1348 #endif
1349         if(tag == LDAP_REQ_BIND) {
1350                 /* immediately abandon all exiting operations upon BIND */
1351                 connection_abandon( conn );
1352         }
1353
1354         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1355
1356         op->o_pagedresults_state = conn->c_pagedresults_state;
1357
1358 #ifdef LDAP_CONNECTIONLESS
1359         op->o_peeraddr = peeraddr;
1360         if (cdn) {
1361             ber_str2bv( cdn, 0, 1, &op->o_dn );
1362             op->o_protocol = LDAP_VERSION2;
1363         }
1364 #endif
1365         if ( conn->c_conn_state == SLAP_C_BINDING
1366                 || conn->c_conn_state == SLAP_C_CLOSING )
1367         {
1368 #ifdef NEW_LOGGING
1369                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1370                            "connection_input: conn %lu  deferring operation\n",
1371                            conn->c_connid ));
1372 #else
1373                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1374 #endif
1375                 conn->c_n_ops_pending++;
1376                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1377
1378         } else {
1379                 conn->c_n_ops_executing++;
1380                 connection_op_activate( conn, op );
1381         }
1382
1383 #ifdef NO_THREADS
1384         if ( conn->c_struct_state != SLAP_C_USED ) {
1385                 /* connection must have got closed underneath us */
1386                 return 1;
1387         }
1388 #endif
1389         assert( conn->c_struct_state == SLAP_C_USED );
1390
1391         return 0;
1392 }
1393
1394 static int
1395 connection_resched( Connection *conn )
1396 {
1397         Operation *op;
1398
1399         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1400                 int rc;
1401                 ber_socket_t    sd;
1402                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1403
1404                 /* us trylock to avoid possible deadlock */
1405                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1406
1407                 if( rc ) {
1408 #ifdef NEW_LOGGING
1409                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1410                                    "connection_resched: conn %lu  reaquiring locks.\n",
1411                                    conn->c_connid ));
1412 #else
1413                         Debug( LDAP_DEBUG_TRACE,
1414                                 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1415                                 conn->c_connid, sd, 0 );
1416 #endif
1417                         /*
1418                          * reaquire locks in the right order...
1419                          * this may allow another thread to close this connection,
1420                          * so recheck state below.
1421                          */
1422                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1423                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1424                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1425                 }
1426
1427                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1428 #ifdef NEW_LOGGING
1429                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1430                                    "connection_resched: conn %lu  closed by other thread.\n",
1431                                    conn->c_connid ));
1432 #else
1433                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1434                                 "closed by other thread conn=%lu sd=%d\n",
1435                                 conn->c_connid, sd, 0 );
1436 #endif
1437                 } else {
1438 #ifdef NEW_LOGGING
1439                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1440                                    "connection_resched: conn %lu  attempting closing.\n",
1441                                    conn->c_connid ));
1442 #else
1443                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1444                                 "attempting closing conn=%lu sd=%d\n",
1445                                 conn->c_connid, sd, 0 );
1446 #endif
1447                         connection_close( conn );
1448                 }
1449
1450                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1451                 return 0;
1452         }
1453
1454         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1455                 /* other states need different handling */
1456                 return 0;
1457         }
1458
1459         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1460                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1461                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1462                 /* pending operations should not be marked for abandonment */
1463                 assert(!op->o_abandon);
1464
1465                 conn->c_n_ops_pending--;
1466                 conn->c_n_ops_executing++;
1467
1468                 connection_op_activate( conn, op );
1469
1470                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1471                         break;
1472                 }
1473         }
1474         return 0;
1475 }
1476
1477 static int connection_op_activate( Connection *conn, Operation *op )
1478 {
1479         struct co_arg *arg;
1480         int status;
1481         ber_tag_t tag = op->o_tag;
1482
1483         if(tag == LDAP_REQ_BIND) {
1484                 conn->c_conn_state = SLAP_C_BINDING;
1485         }
1486
1487         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1488         arg->co_conn = conn;
1489         arg->co_op = op;
1490
1491         if (!arg->co_op->o_dn.bv_len) {
1492             arg->co_op->o_authz = conn->c_authz;
1493             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1494                 conn->c_dn.bv_val : "" );
1495             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1496                 conn->c_ndn.bv_val : "" );
1497         }
1498         arg->co_op->o_authtype = conn->c_authtype;
1499         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1500
1501         if (!arg->co_op->o_protocol) {
1502             arg->co_op->o_protocol = conn->c_protocol
1503                 ? conn->c_protocol : LDAP_VERSION3;
1504         }
1505         arg->co_op->o_connid = conn->c_connid;
1506
1507         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1508
1509         status = ldap_pvt_thread_pool_submit( &connection_pool,
1510                 connection_operation, (void *) arg );
1511
1512         if ( status != 0 ) {
1513 #ifdef NEW_LOGGING
1514                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1515                            "connection_op_activate: conn %lu     thread pool submit failed.\n",
1516                            conn->c_connid ));
1517 #else
1518                 Debug( LDAP_DEBUG_ANY,
1519                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1520 #endif
1521                 /* should move op to pending list */
1522         }
1523
1524         return status;
1525 }
1526
1527 int connection_write(ber_socket_t s)
1528 {
1529         Connection *c;
1530         assert( connections != NULL );
1531
1532         ldap_pvt_thread_mutex_lock( &connections_mutex );
1533
1534         c = connection_get( s );
1535
1536         slapd_clr_write( s, 0);
1537
1538         if( c == NULL ) {
1539 #ifdef NEW_LOGGING
1540                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1541                            "connection_write: sock %ld  no connection!\n",(long)s));
1542 #else
1543                 Debug( LDAP_DEBUG_ANY,
1544                         "connection_write(%ld): no connection!\n",
1545                         (long) s, 0, 0 );
1546 #endif
1547                 slapd_remove(s, 0);
1548                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1549                 return -1;
1550         }
1551
1552         c->c_n_write++;
1553
1554 #ifdef NEW_LOGGING
1555         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1556                    "connection_write conn %lu  waking output.\n",
1557                    c->c_connid ));
1558 #else
1559         Debug( LDAP_DEBUG_TRACE,
1560                 "connection_write(%d): waking output for id=%lu\n",
1561                 s, c->c_connid, 0 );
1562 #endif
1563         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1564
1565         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1566                 slapd_set_read( s, 1 );
1567         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1568                 slapd_set_write( s, 1 );
1569         connection_return( c );
1570         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1571         return 0;
1572 }
1573