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                         ber_sockbuf_ctrl( connections[i].c_sb,
 238                                 LBER_SB_OPT_GET_FD, &sd );
 239
 240                         if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
 241                                 assert( connections[i].c_conn_state == SLAP_C_INVALID );
 242                                 assert( connections[i].c_sb == 0 );
 243                                 break;
 244                         }
 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 %ld\n",s, c->c_connid ));
 292 #else
 293                 Debug( LDAP_DEBUG_TRACE,
 294                         "connection_get(%d): got connid=%ld\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 %d  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, 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
 629     assert( connections != NULL );
 630     assert( c != NULL );
 631     assert( c->c_struct_state != SLAP_C_UNUSED );
 632     assert( c->c_conn_state != SLAP_C_INVALID );
 633     assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
 634
 635     backend_connection_destroy(c);
 636
 637     c->c_protocol = 0;
 638     c->c_connid = -1;
 639
 640     c->c_activitytime = c->c_starttime = 0;
 641
 642         connection2anonymous( c );
 643
 644         if(c->c_listener_url.bv_val != NULL) {
 645                 free(c->c_listener_url.bv_val);
 646                 c->c_listener_url.bv_val = NULL;
 647         }
 648         c->c_listener_url.bv_len = 0;
 649
 650         if(c->c_peer_domain.bv_val != NULL) {
 651                 free(c->c_peer_domain.bv_val);
 652                 c->c_peer_domain.bv_val = NULL;
 653         }
 654         c->c_peer_domain.bv_len = 0;
 655         if(c->c_peer_name.bv_val != NULL) {
 656 #ifdef LDAP_PF_lOCAL
 657                 /*
 658                  * If peer was a domain socket, unlink. Mind you,
 659                  * they may be un-named. Should we leave this to
 660                  * the client?
 661                  */
 662                 if (strncmp(c->c_peer_name.bv_val, "PATH=", 5) == 0) {
 663                         char *path = c->c_peer_name.bv_val + 5;
 664                         if (path != '\0') {
 665                                 (void)unlink(path);
 666                         }
 667                 }
 668 #endif /* LDAP_PF_LOCAL */
 669
 670                 free(c->c_peer_name.bv_val);
 671                 c->c_peer_name.bv_val = NULL;
 672         }
 673         c->c_peer_name.bv_len = 0;
 674         if(c->c_sock_name.bv_val != NULL) {
 675                 free(c->c_sock_name.bv_val);
 676                 c->c_sock_name.bv_val = NULL;
 677         }
 678         c->c_sock_name.bv_len = 0;
 679
 680         c->c_sasl_bind_in_progress = 0;
 681         if(c->c_sasl_bind_mech.bv_val != NULL) {
 682                 free(c->c_sasl_bind_mech.bv_val);
 683                 c->c_sasl_bind_mech.bv_val = NULL;
 684         }
 685         c->c_sasl_bind_mech.bv_len = 0;
 686
 687         slap_sasl_close( c );
 688
 689         if ( c->c_currentber != NULL ) {
 690                 ber_free( c->c_currentber, 1 );
 691                 c->c_currentber = NULL;
 692         }
 693
 694         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 695         if ( sd != AC_SOCKET_INVALID ) {
 696                 slapd_remove( sd, 0 );
 697
 698                 Statslog( LDAP_DEBUG_STATS,
 699                     "conn=%ld fd=%d closed\n",
 700                         c->c_connid, sd, 0, 0, 0 );
 701         }
 702
 703         ber_sockbuf_free( c->c_sb );
 704
 705         c->c_sb = ber_sockbuf_alloc( );
 706
 707         {
 708                 ber_len_t max = sockbuf_max_incoming;
 709                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
 710         }
 711
 712     c->c_conn_state = SLAP_C_INVALID;
 713     c->c_struct_state = SLAP_C_UNUSED;
 714 }
 715
 716 int connection_state_closing( Connection *c )
 717 {
 718         /* c_mutex must be locked by caller */
 719
 720         int state;
 721         assert( c != NULL );
 722         assert( c->c_struct_state == SLAP_C_USED );
 723
 724         state = c->c_conn_state;
 725
 726         assert( state != SLAP_C_INVALID );
 727
 728         return state == SLAP_C_CLOSING;
 729 }
 730
 731 static void connection_abandon( Connection *c )
 732 {
 733         /* c_mutex must be locked by caller */
 734
 735         Operation *o;
 736
 737         LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
 738                 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
 739                 o->o_abandon = 1;
 740                 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
 741         }
 742
 743         /* remove pending operations */
 744         while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
 745                 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
 746                 LDAP_STAILQ_NEXT(o, o_next) = NULL;
 747                 slap_op_free( o );
 748         }
 749 }
 750
 751 void connection_closing( Connection *c )
 752 {
 753         assert( connections != NULL );
 754         assert( c != NULL );
 755         assert( c->c_struct_state == SLAP_C_USED );
 756         assert( c->c_conn_state != SLAP_C_INVALID );
 757
 758         /* c_mutex must be locked by caller */
 759
 760         if( c->c_conn_state != SLAP_C_CLOSING ) {
 761                 ber_socket_t    sd;
 762
 763                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 764 #ifdef NEW_LOGGING
 765                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 766                            "connection_closing: conn %d readying socket %d for close.\n",
 767                            c->c_connid, sd ));
 768 #else
 769                 Debug( LDAP_DEBUG_TRACE,
 770                         "connection_closing: readying conn=%ld sd=%d for close\n",
 771                         c->c_connid, sd, 0 );
 772 #endif
 773                 /* update state to closing */
 774                 c->c_conn_state = SLAP_C_CLOSING;
 775
 776                 /* don't listen on this port anymore */
 777                 slapd_clr_read( sd, 1 );
 778
 779                 /* abandon active operations */
 780                 connection_abandon( c );
 781
 782                 /* wake write blocked operations */
 783                 slapd_clr_write( sd, 1 );
 784                 ldap_pvt_thread_cond_signal( &c->c_write_cv );
 785         }
 786 }
 787
 788 static void connection_close( Connection *c )
 789 {
 790         ber_socket_t    sd;
 791
 792         assert( connections != NULL );
 793         assert( c != NULL );
 794         assert( c->c_struct_state == SLAP_C_USED );
 795         assert( c->c_conn_state == SLAP_C_CLOSING );
 796
 797         /* note: connections_mutex and c_mutex should be locked by caller */
 798
 799         ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
 800         if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
 801 #ifdef NEW_LOGGING
 802                 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
 803                            "connection_close: conn %d  deferring sd %d\n",
 804                            c->c_connid, sd ));
 805 #else
 806                 Debug( LDAP_DEBUG_TRACE,
 807                         "connection_close: deferring conn=%ld sd=%d\n",
 808                         c->c_connid, sd, 0 );
 809 #endif
 810                 return;
 811         }
 812
 813 #ifdef NEW_LOGGING
 814         LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
 815                    "connection_close: conn %d  sd %d\n",
 816                    c->c_connid, sd ));
 817 #else
 818         Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
 819                 c->c_connid, sd, 0 );
 820 #endif
 821         connection_destroy( c );
 822 }
 823
 824 unsigned long connections_nextid(void)
 825 {
 826         unsigned long id;
 827         assert( connections != NULL );
 828
 829         ldap_pvt_thread_mutex_lock( &connections_mutex );
 830
 831         id = conn_nextid;
 832
 833         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 834
 835         return id;
 836 }
 837
 838 Connection* connection_first( ber_socket_t *index )
 839 {
 840         assert( connections != NULL );
 841         assert( index != NULL );
 842
 843         ldap_pvt_thread_mutex_lock( &connections_mutex );
 844
 845         *index = 0;
 846
 847         return connection_next(NULL, index);
 848 }
 849
 850 Connection* connection_next( Connection *c, ber_socket_t *index )
 851 {
 852         assert( connections != NULL );
 853         assert( index != NULL );
 854         assert( *index <= dtblsize );
 855
 856         if( c != NULL ) {
 857                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 858         }
 859
 860         c = NULL;
 861
 862         for(; *index < dtblsize; (*index)++) {
 863                 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
 864                         assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 865 #ifndef HAVE_WINSOCK
 866                         continue;
 867 #else
 868                         break;
 869 #endif
 870                 }
 871
 872                 if( connections[*index].c_struct_state == SLAP_C_USED ) {
 873                         assert( connections[*index].c_conn_state != SLAP_C_INVALID );
 874                         c = &connections[(*index)++];
 875                         break;
 876                 }
 877
 878                 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
 879                 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
 880         }
 881
 882         if( c != NULL ) {
 883                 ldap_pvt_thread_mutex_lock( &c->c_mutex );
 884         }
 885
 886         return c;
 887 }
 888
 889 void connection_done( Connection *c )
 890 {
 891         assert( connections != NULL );
 892
 893         if( c != NULL ) {
 894                 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
 895         }
 896
 897         ldap_pvt_thread_mutex_unlock( &connections_mutex );
 898 }
 899
 900 /*
 901  * connection_activity - handle the request operation op on connection
 902  * conn.  This routine figures out what kind of operation it is and
 903  * calls the appropriate stub to handle it.
 904  */
 905
 906 static void *
 907 connection_operation( void *arg_v )
 908 {
 909         int rc;
 910         struct co_arg   *arg = arg_v;
 911         ber_tag_t tag = arg->co_op->o_tag;
 912         Connection *conn = arg->co_conn;
 913
 914         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 915         num_ops_initiated++;
 916         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 917
 918         if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
 919 #ifdef NEW_LOGGING
 920                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
 921                            "connection_operation: conn %d  SASL bind in progress (tag=%ld).\n",
 922                            conn->c_connid, (long)tag ));
 923 #else
 924                 Debug( LDAP_DEBUG_ANY, "connection_operation: "
 925                         "error: SASL bind in progress (tag=%ld).\n",
 926                         (long) tag, 0, 0 );
 927 #endif
 928                 send_ldap_result( conn, arg->co_op,
 929                         rc = LDAP_OPERATIONS_ERROR,
 930                         NULL, "SASL bind in progress", NULL, NULL );
 931                 goto operations_error;
 932         }
 933
 934         switch ( tag ) {
 935         case LDAP_REQ_BIND:
 936                 rc = do_bind( conn, arg->co_op );
 937                 break;
 938
 939         case LDAP_REQ_UNBIND:
 940                 rc = do_unbind( conn, arg->co_op );
 941                 break;
 942
 943         case LDAP_REQ_ADD:
 944                 rc = do_add( conn, arg->co_op );
 945                 break;
 946
 947         case LDAP_REQ_DELETE:
 948                 rc = do_delete( conn, arg->co_op );
 949                 break;
 950
 951         case LDAP_REQ_MODRDN:
 952                 rc = do_modrdn( conn, arg->co_op );
 953                 break;
 954
 955         case LDAP_REQ_MODIFY:
 956                 rc = do_modify( conn, arg->co_op );
 957                 break;
 958
 959         case LDAP_REQ_COMPARE:
 960                 rc = do_compare( conn, arg->co_op );
 961                 break;
 962
 963         case LDAP_REQ_SEARCH:
 964                 rc = do_search( conn, arg->co_op );
 965                 break;
 966
 967         case LDAP_REQ_ABANDON:
 968                 rc = do_abandon( conn, arg->co_op );
 969                 break;
 970
 971         case LDAP_REQ_EXTENDED:
 972                 rc = do_extended( conn, arg->co_op );
 973                 break;
 974
 975         default:
 976 #ifdef NEW_LOGGING
 977                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
 978                            "connection_operation: conn %d  unknown LDAP request 0x%lx\n",
 979                            conn->c_connid, tag ));
 980 #else
 981                 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
 982                     tag, 0, 0 );
 983 #endif
 984                 arg->co_op->o_tag = LBER_ERROR;
 985                 send_ldap_disconnect( conn, arg->co_op,
 986                         LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
 987                 rc = -1;
 988                 break;
 989         }
 990
 991         if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
 992
 993 operations_error:
 994         ldap_pvt_thread_mutex_lock( &num_ops_mutex );
 995         num_ops_completed++;
 996         ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
 997
 998         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
 999
1000         conn->c_n_ops_executing--;
1001         conn->c_n_ops_completed++;
1002
1003         LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
1004         LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
1005         slap_op_free( arg->co_op );
1006         arg->co_op = NULL;
1007         arg->co_conn = NULL;
1008         free( (char *) arg );
1009         arg = NULL;
1010
1011         switch( tag ) {
1012         case LBER_ERROR:
1013         case LDAP_REQ_UNBIND:
1014                 /* c_mutex is locked */
1015                 connection_closing( conn );
1016                 break;
1017
1018         case LDAP_REQ_BIND:
1019                 conn->c_sasl_bind_in_progress =
1020                         rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1021
1022                 if( conn->c_conn_state == SLAP_C_BINDING) {
1023                         conn->c_conn_state = SLAP_C_ACTIVE;
1024                 }
1025         }
1026
1027         connection_resched( conn );
1028
1029         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1030
1031         return NULL;
1032 }
1033
1034 int connection_read(ber_socket_t s)
1035 {
1036         int rc = 0;
1037         Connection *c;
1038         assert( connections != NULL );
1039
1040         ldap_pvt_thread_mutex_lock( &connections_mutex );
1041
1042         /* get (locked) connection */
1043         c = connection_get( s );
1044
1045         if( c == NULL ) {
1046 #ifdef NEW_LOGGING
1047                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1048                            "connection_read: sock %ld no connection\n",
1049                            (long)s ));
1050 #else
1051                 Debug( LDAP_DEBUG_ANY,
1052                         "connection_read(%ld): no connection!\n",
1053                         (long) s, 0, 0 );
1054 #endif
1055                 slapd_remove(s, 0);
1056
1057                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1058                 return -1;
1059         }
1060
1061         c->c_n_read++;
1062
1063         if( c->c_conn_state == SLAP_C_CLOSING ) {
1064 #ifdef NEW_LOGGING
1065                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1066                            "connection_read: conn %d connection closing, ignoring input\n",
1067                            c->c_connid));
1068 #else
1069                 Debug( LDAP_DEBUG_TRACE,
1070                         "connection_read(%d): closing, ignoring input for id=%ld\n",
1071                         s, c->c_connid, 0 );
1072 #endif
1073                 connection_return( c );
1074                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1075                 return 0;
1076         }
1077
1078 #ifdef NEW_LOGGING
1079         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1080                    "connection_read: conn %d  checking for input.\n", c->c_connid ));
1081 #else
1082         Debug( LDAP_DEBUG_TRACE,
1083                 "connection_read(%d): checking for input on id=%ld\n",
1084                 s, c->c_connid, 0 );
1085 #endif
1086
1087 #ifdef HAVE_TLS
1088         if ( c->c_is_tls && c->c_needs_tls_accept ) {
1089                 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1090                 if ( rc < 0 ) {
1091 #if 0 /* required by next #if 0 */
1092                         struct timeval tv;
1093                         fd_set rfd;
1094 #endif
1095
1096 #ifdef NEW_LOGGING
1097                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1098                                    "connection_read: conn %d  TLS accept error, error %d\n",
1099                                    c->c_connid, rc ));
1100 #else
1101                         Debug( LDAP_DEBUG_TRACE,
1102                                 "connection_read(%d): TLS accept error "
1103                                 "error=%d id=%ld, closing\n",
1104                                 s, rc, c->c_connid );
1105 #endif
1106                         c->c_needs_tls_accept = 0;
1107                         /* connections_mutex and c_mutex are locked */
1108                         connection_closing( c );
1109
1110 #if 0
1111                         /* Drain input before close, to allow SSL error codes
1112                          * to propagate to client. */
1113                         FD_ZERO(&rfd);
1114                         FD_SET(s, &rfd);
1115                         for (rc=1; rc>0;)
1116                         {
1117                             tv.tv_sec = 1;
1118                             tv.tv_usec = 0;
1119                             rc = select(s+1, &rfd, NULL, NULL, &tv);
1120                             if (rc == 1)
1121                                 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1122                                     NULL);
1123                         }
1124 #endif
1125                         connection_close( c );
1126
1127                 } else if ( rc == 0 ) {
1128                         void *ssl;
1129                         char *authid;
1130
1131                         c->c_needs_tls_accept = 0;
1132
1133                         /* we need to let SASL know */
1134                         ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1135
1136                         c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1137                         if( c->c_tls_ssf > c->c_ssf ) {
1138                                 c->c_ssf = c->c_tls_ssf;
1139                         }
1140
1141                         authid = (char *)ldap_pvt_tls_get_peer( ssl );
1142                         slap_sasl_external( c, c->c_tls_ssf, authid );
1143                 }
1144                 connection_return( c );
1145                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1146                 return 0;
1147         }
1148 #endif
1149
1150 #ifdef HAVE_CYRUS_SASL
1151         if ( c->c_sasl_layers ) {
1152                 c->c_sasl_layers = 0;
1153
1154                 rc = ldap_pvt_sasl_install( c->c_sb,  c->c_sasl_context );
1155
1156                 if( rc != LDAP_SUCCESS ) {
1157 #ifdef NEW_LOGGING
1158                         LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1159                                    "connection_read: conn %d SASL install error %d, closing\n",
1160                                    c->c_connid, rc ));
1161 #else
1162                         Debug( LDAP_DEBUG_TRACE,
1163                                 "connection_read(%d): SASL install error "
1164                                 "error=%d id=%ld, closing\n",
1165                                 s, rc, c->c_connid );
1166 #endif
1167                         /* connections_mutex and c_mutex are locked */
1168                         connection_closing( c );
1169                         connection_close( c );
1170                         connection_return( c );
1171                         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1172                         return 0;
1173                 }
1174         }
1175 #endif
1176
1177 #define CONNECTION_INPUT_LOOP 1
1178
1179 #ifdef DATA_READY_LOOP
1180         while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1181 #elif CONNECTION_INPUT_LOOP
1182         while(!rc)
1183 #endif
1184         {
1185                 /* How do we do this without getting into a busy loop ? */
1186                 rc = connection_input( c );
1187         }
1188
1189         if( rc < 0 ) {
1190 #ifdef NEW_LOGGING
1191                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1192                            "connection_read: conn %d  input error %d, closing.\n",
1193                            c->c_connid, rc ));
1194 #else
1195                 Debug( LDAP_DEBUG_TRACE,
1196                         "connection_read(%d): input error=%d id=%ld, closing.\n",
1197                         s, rc, c->c_connid );
1198 #endif
1199                 /* connections_mutex and c_mutex are locked */
1200                 connection_closing( c );
1201                 connection_close( c );
1202                 connection_return( c );
1203                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1204                 return 0;
1205         }
1206
1207         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1208                 slapd_set_read( s, 1 );
1209         }
1210
1211         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1212                 slapd_set_write( s, 1 );
1213         }
1214
1215         connection_return( c );
1216         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1217         return 0;
1218 }
1219
1220 static int
1221 connection_input(
1222     Connection *conn
1223 )
1224 {
1225         Operation *op;
1226         ber_tag_t       tag;
1227         ber_len_t       len;
1228         ber_int_t       msgid;
1229         BerElement      *ber;
1230 #ifdef LDAP_CONNECTIONLESS
1231         Sockaddr        peeraddr;
1232         char            *cdn = NULL;
1233 #endif
1234
1235         if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1236             == NULL ) {
1237 #ifdef NEW_LOGGING
1238                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1239                            "connection_input: conn %d  ber_alloc failed.\n", conn->c_connid ));
1240 #else
1241                 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1242 #endif
1243                 return -1;
1244         }
1245
1246         errno = 0;
1247
1248 #ifdef LDAP_CONNECTIONLESS
1249         if (conn->c_is_udp)
1250         {
1251                 char    peername[sizeof("IP=255.255.255.255:65336")];
1252                 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1253                         sizeof(struct sockaddr));
1254                 if (len != sizeof(struct sockaddr))
1255                         return 1;
1256                 sprintf( peername, "IP=%s:%d",
1257                         inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1258                         (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1259                 Statslog( LDAP_DEBUG_STATS,
1260                         "conn=%ld UDP request from %s (%s) accepted.\n",
1261                         conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1262         }
1263 #endif
1264         tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1265         if ( tag != LDAP_TAG_MESSAGE ) {
1266                 int err = errno;
1267                 ber_socket_t    sd;
1268
1269                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1270
1271 #ifdef NEW_LOGGING
1272                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1273                            "connection_input: conn %d  ber_get_next failed, errno %d (%s).\n",
1274                            conn->c_connid, err, sock_errstr(err) ));
1275 #else
1276                 Debug( LDAP_DEBUG_TRACE,
1277                         "ber_get_next on fd %d failed errno=%d (%s)\n",
1278                         sd, err, sock_errstr(err) );
1279 #endif
1280                 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1281                         /* log, close and send error */
1282                         ber_free( conn->c_currentber, 1 );
1283                         conn->c_currentber = NULL;
1284
1285                         return -2;
1286                 }
1287                 return 1;
1288         }
1289
1290         ber = conn->c_currentber;
1291         conn->c_currentber = NULL;
1292
1293         if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1294                 /* log, close and send error */
1295 #ifdef NEW_LOGGING
1296                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1297                            "connection_input: conn %d  ber_get_int returns 0x%lx.\n",
1298                            conn->c_connid, tag ));
1299 #else
1300                 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1301                     0 );
1302 #endif
1303                 ber_free( ber, 1 );
1304                 return -1;
1305         }
1306
1307         if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1308                 /* log, close and send error */
1309 #ifdef NEW_LOGGING
1310                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1311                            "connection_input: conn %d  ber_peek_tag returns 0x%lx.\n",
1312                            conn->c_connid, tag ));
1313 #else
1314                 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1315                     0 );
1316 #endif
1317                 ber_free( ber, 1 );
1318
1319                 return -1;
1320         }
1321
1322 #ifdef LDAP_CONNECTIONLESS
1323         if (conn->c_is_udp) {
1324                 if (tag == LBER_OCTETSTRING) {
1325                         ber_get_stringa( ber, &cdn );
1326                         tag = ber_peek_tag(ber, &len);
1327                 }
1328                 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1329 #ifdef NEW_LOGGING
1330                     LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1331                                "connection_input: conn %d  invalid req for UDP 0x%lx.\n",
1332                                conn->c_connid, tag ));
1333 #else
1334                     Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1335                         0 );
1336 #endif
1337                     ber_free( ber, 1 );
1338                     return 0;
1339                 }
1340         }
1341 #endif
1342         if(tag == LDAP_REQ_BIND) {
1343                 /* immediately abandon all exiting operations upon BIND */
1344                 connection_abandon( conn );
1345         }
1346
1347         op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1348
1349 #ifdef LDAP_CONNECTIONLESS
1350         op->o_peeraddr = peeraddr;
1351         if (cdn) {
1352             op->o_dn.bv_val = ch_strdup( cdn );
1353             op->o_dn.bv_len = strlen( op->o_dn.bv_val );
1354             op->o_protocol = LDAP_VERSION2;
1355         }
1356 #endif
1357         if ( conn->c_conn_state == SLAP_C_BINDING
1358                 || conn->c_conn_state == SLAP_C_CLOSING )
1359         {
1360 #ifdef NEW_LOGGING
1361                 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1362                            "connection_input: conn %d  deferring operation\n",
1363                            conn->c_connid ));
1364 #else
1365                 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1366 #endif
1367                 conn->c_n_ops_pending++;
1368                 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1369
1370         } else {
1371                 conn->c_n_ops_executing++;
1372                 connection_op_activate( conn, op );
1373         }
1374
1375 #ifdef NO_THREADS
1376         if ( conn->c_struct_state != SLAP_C_USED ) {
1377                 /* connection must have got closed underneath us */
1378                 return 1;
1379         }
1380 #endif
1381         assert( conn->c_struct_state == SLAP_C_USED );
1382
1383         return 0;
1384 }
1385
1386 static int
1387 connection_resched( Connection *conn )
1388 {
1389         Operation *op;
1390
1391         if( conn->c_conn_state == SLAP_C_CLOSING ) {
1392                 int rc;
1393                 ber_socket_t    sd;
1394                 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1395
1396                 /* us trylock to avoid possible deadlock */
1397                 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1398
1399                 if( rc ) {
1400 #ifdef NEW_LOGGING
1401                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1402                                    "connection_resched: conn %d  reaquiring locks.\n",
1403                                    conn->c_connid ));
1404 #else
1405                         Debug( LDAP_DEBUG_TRACE,
1406                                 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1407                                 conn->c_connid, sd, 0 );
1408 #endif
1409                         /*
1410                          * reaquire locks in the right order...
1411                          * this may allow another thread to close this connection,
1412                          * so recheck state below.
1413                          */
1414                         ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1415                         ldap_pvt_thread_mutex_lock( &connections_mutex );
1416                         ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1417                 }
1418
1419                 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1420 #ifdef NEW_LOGGING
1421                         LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1422                                    "connection_resched: conn %d  closed by other thread.\n",
1423                                    conn->c_connid ));
1424 #else
1425                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1426                                 "closed by other thread conn=%ld sd=%d\n",
1427                                 conn->c_connid, sd, 0 );
1428 #endif
1429                 } else {
1430 #ifdef NEW_LOGGING
1431                         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1432                                    "connection_resched: conn %d  attempting closing.\n",
1433                                    conn->c_connid ));
1434 #else
1435                         Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1436                                 "attempting closing conn=%ld sd=%d\n",
1437                                 conn->c_connid, sd, 0 );
1438 #endif
1439                         connection_close( conn );
1440                 }
1441
1442                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1443                 return 0;
1444         }
1445
1446         if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1447                 /* other states need different handling */
1448                 return 0;
1449         }
1450
1451         while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1452                 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1453                 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1454                 /* pending operations should not be marked for abandonment */
1455                 assert(!op->o_abandon);
1456
1457                 conn->c_n_ops_pending--;
1458                 conn->c_n_ops_executing++;
1459
1460                 connection_op_activate( conn, op );
1461
1462                 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1463                         break;
1464                 }
1465         }
1466         return 0;
1467 }
1468
1469 static int connection_op_activate( Connection *conn, Operation *op )
1470 {
1471         struct co_arg *arg;
1472         int status;
1473         ber_tag_t tag = op->o_tag;
1474
1475         if(tag == LDAP_REQ_BIND) {
1476                 conn->c_conn_state = SLAP_C_BINDING;
1477         }
1478
1479         arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1480         arg->co_conn = conn;
1481         arg->co_op = op;
1482
1483         if (!arg->co_op->o_dn.bv_len) {
1484             arg->co_op->o_authz = conn->c_authz;
1485             arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1486                 conn->c_dn.bv_val : "" );
1487             arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1488                 conn->c_ndn.bv_val : "" );
1489         }
1490         arg->co_op->o_authtype = conn->c_authtype;
1491         ber_dupbv( &arg->co_op->o_authmech, &conn->c_authmech );
1492
1493         if (!arg->co_op->o_protocol) {
1494             arg->co_op->o_protocol = conn->c_protocol
1495                 ? conn->c_protocol : LDAP_VERSION3;
1496         }
1497         arg->co_op->o_connid = conn->c_connid;
1498
1499         LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1500
1501         status = ldap_pvt_thread_pool_submit( &connection_pool,
1502                 connection_operation, (void *) arg );
1503
1504         if ( status != 0 ) {
1505 #ifdef NEW_LOGGING
1506                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1507                            "connection_op_activate: conn %d      thread pool submit failed.\n",
1508                            conn->c_connid ));
1509 #else
1510                 Debug( LDAP_DEBUG_ANY,
1511                 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1512 #endif
1513                 /* should move op to pending list */
1514         }
1515
1516         return status;
1517 }
1518
1519 int connection_write(ber_socket_t s)
1520 {
1521         Connection *c;
1522         assert( connections != NULL );
1523
1524         ldap_pvt_thread_mutex_lock( &connections_mutex );
1525
1526         c = connection_get( s );
1527
1528         slapd_clr_write( s, 0);
1529
1530         if( c == NULL ) {
1531 #ifdef NEW_LOGGING
1532                 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1533                            "connection_write: sock %ld  no connection!\n",(long)s));
1534 #else
1535                 Debug( LDAP_DEBUG_ANY,
1536                         "connection_write(%ld): no connection!\n",
1537                         (long) s, 0, 0 );
1538 #endif
1539                 slapd_remove(s, 0);
1540                 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1541                 return -1;
1542         }
1543
1544         c->c_n_write++;
1545
1546 #ifdef NEW_LOGGING
1547         LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1548                    "connection_write conn %d  waking output.\n",
1549                    c->c_connid ));
1550 #else
1551         Debug( LDAP_DEBUG_TRACE,
1552                 "connection_write(%d): waking output for id=%ld\n",
1553                 s, c->c_connid, 0 );
1554 #endif
1555         ldap_pvt_thread_cond_signal( &c->c_write_cv );
1556
1557         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1558                 slapd_set_read( s, 1 );
1559         if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1560                 slapd_set_write( s, 1 );
1561         connection_return( c );
1562         ldap_pvt_thread_mutex_unlock( &connections_mutex );
1563         return 0;
1564 }
1565