2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2009 The OpenLDAP Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
11 * A copy of this license is available in the file LICENSE in the
12 * top-level directory of the distribution or, alternatively, at
13 * <http://www.OpenLDAP.org/license.html>.
15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
16 * All rights reserved.
18 * Redistribution and use in source and binary forms are permitted
19 * provided that this notice is preserved and that due credit is given
20 * to the University of Michigan at Ann Arbor. The name of the University
21 * may not be used to endorse or promote products derived from this
22 * software without specific prior written permission. This software
23 * is provided ``as is'' without express or implied warranty.
33 #include <ac/socket.h>
35 #include <ac/string.h>
37 #include <ac/unistd.h>
43 #include "slapi/slapi.h"
46 /* protected by connections_mutex */
47 static ldap_pvt_thread_mutex_t connections_mutex;
48 static Connection *connections = NULL;
50 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
51 static unsigned long conn_nextid = 0;
53 static const char conn_lost_str[] = "connection lost";
55 /* structure state (protected by connections_mutex) */
56 enum sc_struct_state {
57 SLAP_C_UNINITIALIZED = 0, /* MUST BE ZERO (0) */
63 /* connection state (protected by c_mutex ) */
65 SLAP_C_INVALID = 0, /* MUST BE ZERO (0) */
66 SLAP_C_INACTIVE, /* zero threads */
67 SLAP_C_CLOSING, /* closing */
68 SLAP_C_ACTIVE, /* one or more threads */
69 SLAP_C_BINDING, /* binding */
70 SLAP_C_CLIENT /* outbound client conn */
74 connection_state2str( int state )
77 case SLAP_C_INVALID: return "!";
78 case SLAP_C_INACTIVE: return "|";
79 case SLAP_C_CLOSING: return "C";
80 case SLAP_C_ACTIVE: return "";
81 case SLAP_C_BINDING: return "B";
82 case SLAP_C_CLIENT: return "L";
88 static Connection* connection_get( ber_socket_t s );
90 typedef struct conn_readinfo {
92 ldap_pvt_thread_start_t *func;
98 static int connection_input( Connection *c, conn_readinfo *cri );
99 static void connection_close( Connection *c );
101 static int connection_op_activate( Operation *op );
102 static void connection_op_queue( Operation *op );
103 static int connection_resched( Connection *conn );
104 static void connection_abandon( Connection *conn );
105 static void connection_destroy( Connection *c );
107 static ldap_pvt_thread_start_t connection_operation;
110 * Initialize connection management infrastructure.
112 int connections_init(void)
116 assert( connections == NULL );
118 if( connections != NULL) {
119 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
124 /* should check return of every call */
125 ldap_pvt_thread_mutex_init( &connections_mutex );
126 ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
128 connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
130 if( connections == NULL ) {
131 Debug( LDAP_DEBUG_ANY, "connections_init: "
132 "allocation (%d*%ld) of connection array failed\n",
133 dtblsize, (long) sizeof(Connection), 0 );
137 assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
138 assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
140 for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
143 * per entry initialization of the Connection array initialization
144 * will be done by connection_init()
151 * Destroy connection management infrastructure.
154 int connections_destroy(void)
158 /* should check return of every call */
160 if( connections == NULL) {
161 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
166 for ( i = 0; i < dtblsize; i++ ) {
167 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
168 ber_sockbuf_free( connections[i].c_sb );
169 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
170 ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
171 ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
172 ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
173 ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
175 if ( slapi_plugins_used ) {
176 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
186 ldap_pvt_thread_mutex_destroy( &connections_mutex );
187 ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
192 * shutdown all connections
194 int connections_shutdown(void)
198 for ( i = 0; i < dtblsize; i++ ) {
199 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
200 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
201 if( connections[i].c_struct_state == SLAP_C_USED ) {
203 /* give persistent clients a chance to cleanup */
204 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
205 ldap_pvt_thread_pool_submit( &connection_pool,
206 connections[i].c_clientfunc, connections[i].c_clientarg );
208 /* c_mutex is locked */
209 connection_closing( &connections[i], "slapd shutdown" );
210 connection_close( &connections[i] );
213 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
221 * Timeout idle connections.
223 int connections_timeout_idle(time_t now)
225 int i = 0, writers = 0;
230 old = slapd_get_writetime();
232 for( c = connection_first( &connindex );
234 c = connection_next( c, &connindex ) )
236 /* Don't timeout a slow-running request or a persistent
237 * outbound connection. But if it has a writewaiter, see
238 * if the waiter has been there too long.
240 if(( c->c_n_ops_executing && !c->c_writewaiter)
241 || c->c_conn_state == SLAP_C_CLIENT ) {
245 if( global_idletimeout &&
246 difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
248 connection_closing( c, "idletimeout" );
249 connection_close( c );
253 if ( c->c_writewaiter && global_writetimeout ) {
255 if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
257 connection_closing( c, "writetimeout" );
258 connection_close( c );
263 connection_done( c );
264 if ( old && !writers )
265 slapd_clr_writetime( old );
270 static Connection* connection_get( ber_socket_t s )
274 Debug( LDAP_DEBUG_ARGS,
275 "connection_get(%ld)\n",
278 assert( connections != NULL );
280 if(s == AC_SOCKET_INVALID) return NULL;
282 assert( s < dtblsize );
286 ldap_pvt_thread_mutex_lock( &c->c_mutex );
288 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
290 if( c->c_struct_state != SLAP_C_USED ) {
291 /* connection must have been closed due to resched */
293 assert( c->c_conn_state == SLAP_C_INVALID );
294 assert( c->c_sd == AC_SOCKET_INVALID );
296 Debug( LDAP_DEBUG_CONNS,
297 "connection_get(%d): connection not used\n",
300 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
304 Debug( LDAP_DEBUG_TRACE,
305 "connection_get(%d): got connid=%lu\n",
310 assert( c->c_struct_state == SLAP_C_USED );
311 assert( c->c_conn_state != SLAP_C_INVALID );
312 assert( c->c_sd != AC_SOCKET_INVALID );
314 #ifndef SLAPD_MONITOR
315 if ( global_idletimeout > 0 )
316 #endif /* ! SLAPD_MONITOR */
318 c->c_activitytime = slap_get_time();
325 static void connection_return( Connection *c )
327 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
330 Connection * connection_init(
334 const char* peername,
337 struct berval *authid
338 LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
343 ber_socket_t sfd = SLAP_FD2SOCK(s);
345 assert( connections != NULL );
347 assert( listener != NULL );
348 assert( dnsname != NULL );
349 assert( peername != NULL );
352 assert( !( flags & CONN_IS_TLS ));
355 if( s == AC_SOCKET_INVALID ) {
356 Debug( LDAP_DEBUG_ANY,
357 "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
362 assert( s < dtblsize );
364 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
367 assert( c->c_struct_state == SLAP_C_UNUSED );
371 c->c_send_ldap_result = slap_send_ldap_result;
372 c->c_send_search_entry = slap_send_search_entry;
373 c->c_send_search_reference = slap_send_search_reference;
374 c->c_send_ldap_extended = slap_send_ldap_extended;
375 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
377 BER_BVZERO( &c->c_authmech );
378 BER_BVZERO( &c->c_dn );
379 BER_BVZERO( &c->c_ndn );
381 c->c_listener = NULL;
382 BER_BVZERO( &c->c_peer_domain );
383 BER_BVZERO( &c->c_peer_name );
385 LDAP_STAILQ_INIT(&c->c_ops);
386 LDAP_STAILQ_INIT(&c->c_pending_ops);
389 c->c_txn = CONN_TXN_INACTIVE;
390 c->c_txn_backend = NULL;
391 LDAP_STAILQ_INIT(&c->c_txn_ops);
394 BER_BVZERO( &c->c_sasl_bind_mech );
396 c->c_sasl_authctx = NULL;
397 c->c_sasl_sockctx = NULL;
398 c->c_sasl_extra = NULL;
399 c->c_sasl_bindop = NULL;
401 c->c_sb = ber_sockbuf_alloc( );
404 ber_len_t max = sockbuf_max_incoming;
405 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
408 c->c_currentber = NULL;
410 /* should check status of thread calls */
411 ldap_pvt_thread_mutex_init( &c->c_mutex );
412 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
413 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
414 ldap_pvt_thread_cond_init( &c->c_write1_cv );
415 ldap_pvt_thread_cond_init( &c->c_write2_cv );
418 if ( slapi_plugins_used ) {
419 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
424 ldap_pvt_thread_mutex_lock( &c->c_mutex );
426 assert( BER_BVISNULL( &c->c_authmech ) );
427 assert( BER_BVISNULL( &c->c_dn ) );
428 assert( BER_BVISNULL( &c->c_ndn ) );
429 assert( c->c_listener == NULL );
430 assert( BER_BVISNULL( &c->c_peer_domain ) );
431 assert( BER_BVISNULL( &c->c_peer_name ) );
432 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
433 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
435 assert( c->c_txn == CONN_TXN_INACTIVE );
436 assert( c->c_txn_backend == NULL );
437 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
439 assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
440 assert( c->c_sasl_done == 0 );
441 assert( c->c_sasl_authctx == NULL );
442 assert( c->c_sasl_sockctx == NULL );
443 assert( c->c_sasl_extra == NULL );
444 assert( c->c_sasl_bindop == NULL );
445 assert( c->c_currentber == NULL );
446 assert( c->c_writewaiter == 0);
447 assert( c->c_writers == 0);
449 c->c_listener = listener;
452 if ( flags & CONN_IS_CLIENT ) {
454 ldap_pvt_thread_mutex_lock( &connections_mutex );
455 c->c_conn_state = SLAP_C_CLIENT;
456 c->c_struct_state = SLAP_C_USED;
457 ldap_pvt_thread_mutex_unlock( &connections_mutex );
458 c->c_close_reason = "?"; /* should never be needed */
459 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
460 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
465 ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
466 ber_str2bv( peername, 0, 1, &c->c_peer_name );
468 c->c_n_ops_received = 0;
469 c->c_n_ops_executing = 0;
470 c->c_n_ops_pending = 0;
471 c->c_n_ops_completed = 0;
477 /* set to zero until bind, implies LDAP_VERSION3 */
480 #ifndef SLAPD_MONITOR
481 if ( global_idletimeout > 0 )
482 #endif /* ! SLAPD_MONITOR */
484 c->c_activitytime = c->c_starttime = slap_get_time();
487 #ifdef LDAP_CONNECTIONLESS
489 if( flags & CONN_IS_UDP ) {
492 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
493 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
495 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
496 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
497 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
498 LBER_SBIOD_LEVEL_PROVIDER, NULL );
500 #endif /* LDAP_CONNECTIONLESS */
502 if ( flags & CONN_IS_IPC ) {
504 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
505 LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
507 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
508 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
509 #ifdef LDAP_PF_LOCAL_SENDMSG
510 if ( !BER_BVISEMPTY( peerbv ))
511 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
514 #endif /* LDAP_PF_LOCAL */
517 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
518 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
520 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
521 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
525 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
526 INT_MAX, (void*)"ldap_" );
529 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
530 c /* non-NULL */ ) < 0 )
532 Debug( LDAP_DEBUG_ANY,
533 "connection_init(%d, %s): set nonblocking failed\n",
534 s, c->c_peer_name.bv_val, 0 );
537 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
538 id = c->c_connid = conn_nextid++;
539 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
541 ldap_pvt_thread_mutex_lock( &connections_mutex );
542 c->c_conn_state = SLAP_C_INACTIVE;
543 c->c_struct_state = SLAP_C_USED;
544 ldap_pvt_thread_mutex_unlock( &connections_mutex );
545 c->c_close_reason = "?"; /* should never be needed */
547 c->c_ssf = c->c_transport_ssf = ssf;
551 if ( flags & CONN_IS_TLS ) {
553 c->c_needs_tls_accept = 1;
556 c->c_needs_tls_accept = 0;
560 slap_sasl_open( c, 0 );
561 slap_sasl_external( c, ssf, authid );
563 slapd_add_internal( s, 1 );
564 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
566 backend_connection_init(c);
571 void connection2anonymous( Connection *c )
573 assert( connections != NULL );
577 ber_len_t max = sockbuf_max_incoming;
578 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
581 if ( !BER_BVISNULL( &c->c_authmech ) ) {
582 ch_free(c->c_authmech.bv_val);
584 BER_BVZERO( &c->c_authmech );
586 if ( !BER_BVISNULL( &c->c_dn ) ) {
587 ch_free(c->c_dn.bv_val);
589 BER_BVZERO( &c->c_dn );
591 if ( !BER_BVISNULL( &c->c_ndn ) ) {
592 ch_free(c->c_ndn.bv_val);
594 BER_BVZERO( &c->c_ndn );
596 if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
597 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
599 BER_BVZERO( &c->c_sasl_authz_dn );
601 c->c_authz_backend = NULL;
605 connection_destroy( Connection *c )
607 unsigned long connid;
608 const char *close_reason;
612 assert( connections != NULL );
614 assert( c->c_struct_state != SLAP_C_UNUSED );
615 assert( c->c_conn_state != SLAP_C_INVALID );
616 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
617 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
619 assert( c->c_txn == CONN_TXN_INACTIVE );
620 assert( c->c_txn_backend == NULL );
621 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
623 assert( c->c_writewaiter == 0);
624 assert( c->c_writers == 0);
626 /* only for stats (print -1 as "%lu" may give unexpected results ;) */
627 connid = c->c_connid;
628 close_reason = c->c_close_reason;
630 ldap_pvt_thread_mutex_lock( &connections_mutex );
631 c->c_struct_state = SLAP_C_PENDING;
632 ldap_pvt_thread_mutex_unlock( &connections_mutex );
634 backend_connection_destroy(c);
639 c->c_activitytime = c->c_starttime = 0;
641 connection2anonymous( c );
642 c->c_listener = NULL;
644 if(c->c_peer_domain.bv_val != NULL) {
645 free(c->c_peer_domain.bv_val);
647 BER_BVZERO( &c->c_peer_domain );
648 if(c->c_peer_name.bv_val != NULL) {
649 free(c->c_peer_name.bv_val);
651 BER_BVZERO( &c->c_peer_name );
653 c->c_sasl_bind_in_progress = 0;
654 if(c->c_sasl_bind_mech.bv_val != NULL) {
655 free(c->c_sasl_bind_mech.bv_val);
657 BER_BVZERO( &c->c_sasl_bind_mech );
659 slap_sasl_close( c );
661 if ( c->c_currentber != NULL ) {
662 ber_free( c->c_currentber, 1 );
663 c->c_currentber = NULL;
668 /* call destructors, then constructors; avoids unnecessary allocation */
669 if ( slapi_plugins_used ) {
670 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
675 c->c_sd = AC_SOCKET_INVALID;
676 c->c_conn_state = SLAP_C_INVALID;
677 c->c_struct_state = SLAP_C_UNUSED;
678 c->c_close_reason = "?"; /* should never be needed */
681 c->c_sb = ber_sockbuf_alloc( );
683 ber_len_t max = sockbuf_max_incoming;
684 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
687 /* c must be fully reset by this point; when we call slapd_remove
688 * it may get immediately reused by a new connection.
690 if ( sd != AC_SOCKET_INVALID ) {
691 slapd_remove( sd, sb, 1, 0, 0 );
693 if ( close_reason == NULL ) {
694 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
695 connid, (long) sd, 0, 0, 0 );
697 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
698 connid, (long) sd, close_reason, 0, 0 );
703 int connection_valid( Connection *c )
705 /* c_mutex must be locked by caller */
709 return c->c_struct_state == SLAP_C_USED &&
710 c->c_conn_state >= SLAP_C_ACTIVE &&
711 c->c_conn_state <= SLAP_C_CLIENT;
714 static void connection_abandon( Connection *c )
716 /* c_mutex must be locked by caller */
718 Operation *o, *next, op = {0};
724 op.o_connid = c->c_connid;
725 op.o_tag = LDAP_REQ_ABANDON;
727 for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
728 next = LDAP_STAILQ_NEXT( o, o_next );
729 op.orn_msgid = o->o_msgid;
731 op.o_bd = frontendDB;
732 frontendDB->be_abandon( &op, &rs );
736 /* remove operations in pending transaction */
737 while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
738 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
739 LDAP_STAILQ_NEXT(o, o_next) = NULL;
740 slap_op_free( o, NULL );
743 /* clear transaction */
744 c->c_txn_backend = NULL;
745 c->c_txn = CONN_TXN_INACTIVE;
748 /* remove pending operations */
749 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
750 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
751 LDAP_STAILQ_NEXT(o, o_next) = NULL;
752 slap_op_free( o, NULL );
757 connection_wake_writers( Connection *c )
759 /* wake write blocked operations */
760 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
761 if ( c->c_writers > 0 ) {
762 c->c_writers = -c->c_writers;
763 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
764 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
765 if ( c->c_writewaiter ) {
766 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
767 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
768 slapd_clr_write( c->c_sd, 1 );
769 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
771 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
772 while ( c->c_writers ) {
773 ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
775 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
777 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
778 slapd_clr_write( c->c_sd, 1 );
782 void connection_closing( Connection *c, const char *why )
784 assert( connections != NULL );
787 if ( c->c_struct_state != SLAP_C_USED ) return;
789 assert( c->c_conn_state != SLAP_C_INVALID );
791 /* c_mutex must be locked by caller */
793 if( c->c_conn_state != SLAP_C_CLOSING ) {
794 Debug( LDAP_DEBUG_CONNS,
795 "connection_closing: readying conn=%lu sd=%d for close\n",
796 c->c_connid, c->c_sd, 0 );
797 /* update state to closing */
798 c->c_conn_state = SLAP_C_CLOSING;
799 c->c_close_reason = why;
801 /* don't listen on this port anymore */
802 slapd_clr_read( c->c_sd, 0 );
804 /* abandon active operations */
805 connection_abandon( c );
807 /* wake write blocked operations */
808 connection_wake_writers( c );
810 } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
811 /* Client closed connection after doing Unbind. */
812 c->c_close_reason = NULL;
817 connection_close( Connection *c )
819 assert( connections != NULL );
822 if ( c->c_struct_state != SLAP_C_USED ) return;
824 assert( c->c_conn_state == SLAP_C_CLOSING );
826 /* NOTE: c_mutex should be locked by caller */
828 if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
829 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
831 Debug( LDAP_DEBUG_CONNS,
832 "connection_close: deferring conn=%lu sd=%d\n",
833 c->c_connid, c->c_sd, 0 );
837 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
838 c->c_connid, c->c_sd, 0 );
840 connection_destroy( c );
843 unsigned long connections_nextid(void)
846 assert( connections != NULL );
848 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
852 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
857 Connection* connection_first( ber_socket_t *index )
859 assert( connections != NULL );
860 assert( index != NULL );
862 ldap_pvt_thread_mutex_lock( &connections_mutex );
863 for( *index = 0; *index < dtblsize; (*index)++) {
864 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
868 ldap_pvt_thread_mutex_unlock( &connections_mutex );
870 return connection_next(NULL, index);
873 Connection* connection_next( Connection *c, ber_socket_t *index )
875 assert( connections != NULL );
876 assert( index != NULL );
877 assert( *index <= dtblsize );
879 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
883 ldap_pvt_thread_mutex_lock( &connections_mutex );
884 for(; *index < dtblsize; (*index)++) {
886 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
887 /* FIXME: accessing c_conn_state without locking c_mutex */
888 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
892 if( connections[*index].c_struct_state == SLAP_C_USED ) {
893 c = &connections[(*index)++];
894 if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
896 ldap_pvt_thread_mutex_unlock( &connections_mutex );
897 ldap_pvt_thread_mutex_lock( &c->c_mutex );
898 ldap_pvt_thread_mutex_lock( &connections_mutex );
899 if ( c->c_struct_state != SLAP_C_USED ) {
900 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
905 assert( c->c_conn_state != SLAP_C_INVALID );
909 c_struct = connections[*index].c_struct_state;
910 if ( c_struct == SLAP_C_PENDING )
912 assert( c_struct == SLAP_C_UNUSED );
913 /* FIXME: accessing c_conn_state without locking c_mutex */
914 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
917 ldap_pvt_thread_mutex_unlock( &connections_mutex );
921 void connection_done( Connection *c )
923 assert( connections != NULL );
925 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
929 * connection_activity - handle the request operation op on connection
930 * conn. This routine figures out what kind of operation it is and
931 * calls the appropriate stub to handle it.
935 /* FIXME: returns 0 in case of failure */
936 #define INCR_OP_INITIATED(index) \
938 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
939 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
940 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
942 #define INCR_OP_COMPLETED(index) \
944 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
945 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
946 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
947 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
949 #else /* !SLAPD_MONITOR */
950 #define INCR_OP_INITIATED(index) do { } while (0)
951 #define INCR_OP_COMPLETED(index) \
953 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
954 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
955 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
957 #endif /* !SLAPD_MONITOR */
960 * NOTE: keep in sync with enum in slapd.h
962 static BI_op_func *opfun[] = {
976 /* Counters are per-thread, not per-connection.
979 conn_counter_destroy( void *key, void *data )
981 slap_counters_t **prev, *sc;
983 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
984 for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
985 prev = &sc->sc_next, sc = sc->sc_next ) {
990 /* Copy data to main counter */
991 ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
992 ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
993 ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
994 ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
995 ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
996 ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
998 for ( i = 0; i < SLAP_OP_LAST; i++ ) {
999 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1000 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1002 #endif /* SLAPD_MONITOR */
1003 slap_counters_destroy( sc );
1004 ber_memfree_x( data, NULL );
1008 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1012 conn_counter_init( Operation *op, void *ctx )
1014 slap_counters_t *sc;
1017 if ( ldap_pvt_thread_pool_getkey(
1018 ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1019 vsc = ch_malloc( sizeof( slap_counters_t ));
1021 slap_counters_init( sc );
1022 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1023 conn_counter_destroy, NULL, NULL );
1025 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1026 sc->sc_next = slap_counters.sc_next;
1027 slap_counters.sc_next = sc;
1028 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1030 op->o_counters = vsc;
1034 connection_operation( void *ctx, void *arg_v )
1036 int rc = LDAP_OTHER, cancel;
1037 Operation *op = arg_v;
1038 SlapReply rs = {REP_RESULT};
1039 ber_tag_t tag = op->o_tag;
1040 slap_op_t opidx = SLAP_OP_LAST;
1041 Connection *conn = op->o_conn;
1042 void *memctx = NULL;
1043 void *memctx_null = NULL;
1046 conn_counter_init( op, ctx );
1047 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1048 /* FIXME: returns 0 in case of failure */
1049 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1050 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1052 op->o_threadctx = ctx;
1053 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1057 case LDAP_REQ_UNBIND:
1059 case LDAP_REQ_DELETE:
1060 case LDAP_REQ_MODDN:
1061 case LDAP_REQ_MODIFY:
1062 case LDAP_REQ_COMPARE:
1063 case LDAP_REQ_SEARCH:
1064 case LDAP_REQ_ABANDON:
1065 case LDAP_REQ_EXTENDED:
1068 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1069 "conn %lu unknown LDAP request 0x%lx\n",
1070 conn->c_connid, tag, 0 );
1071 op->o_tag = LBER_ERROR;
1072 rs.sr_err = LDAP_PROTOCOL_ERROR;
1073 rs.sr_text = "unknown LDAP request";
1074 send_ldap_disconnect( op, &rs );
1075 rc = SLAPD_DISCONNECT;
1076 goto operations_error;
1079 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1080 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1081 "error: SASL bind in progress (tag=%ld).\n",
1083 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1084 "SASL bind in progress" );
1085 rc = LDAP_OPERATIONS_ERROR;
1086 goto operations_error;
1090 if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1091 ( tag == LDAP_REQ_ADD ) ||
1092 ( tag == LDAP_REQ_DELETE ) ||
1093 ( tag == LDAP_REQ_MODIFY ) ||
1094 ( tag == LDAP_REQ_MODRDN )))
1096 /* Disable SLAB allocator for all update operations
1097 issued inside of a transaction */
1098 op->o_tmpmemctx = NULL;
1099 op->o_tmpmfuncs = &ch_mfuncs;
1103 /* We can use Thread-Local storage for most mallocs. We can
1104 * also use TL for ber parsing, but not on Add or Modify.
1107 memsiz = ber_len( op->o_ber ) * 64;
1108 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1110 memsiz = SLAP_SLAB_SIZE;
1112 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1113 op->o_tmpmemctx = memctx;
1114 op->o_tmpmfuncs = &slap_sl_mfuncs;
1115 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1116 /* Note - the ber and its buffer are already allocated from
1117 * regular memory; this only affects subsequent mallocs that
1118 * ber_scanf may invoke.
1120 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1124 opidx = slap_req2op( tag );
1125 assert( opidx != SLAP_OP_LAST );
1126 INCR_OP_INITIATED( opidx );
1127 rc = (*(opfun[opidx]))( op, &rs );
1130 if ( rc == SLAPD_DISCONNECT ) {
1133 } else if ( opidx != SLAP_OP_LAST ) {
1134 /* increment completed operations count
1135 * only if operation was initiated
1136 * and rc != SLAPD_DISCONNECT */
1137 INCR_OP_COMPLETED( opidx );
1140 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1142 if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1143 conn->c_conn_state = SLAP_C_ACTIVE;
1145 cancel = op->o_cancel;
1146 if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1147 if ( cancel == SLAP_CANCEL_REQ ) {
1148 op->o_cancel = rc == SLAPD_ABANDON
1149 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1153 /* Fake a cond_wait with thread_yield, then
1154 * verify the result properly mutex-protected.
1156 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1158 ldap_pvt_thread_yield();
1159 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1160 && cancel != SLAP_CANCEL_DONE );
1161 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1162 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1163 && cancel != SLAP_CANCEL_DONE );
1166 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1168 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1169 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1170 conn->c_n_ops_executing--;
1171 conn->c_n_ops_completed++;
1175 case LDAP_REQ_UNBIND:
1176 /* c_mutex is locked */
1177 connection_closing( conn,
1178 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1182 connection_resched( conn );
1183 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1184 slap_op_free( op, ctx );
1188 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1190 Connection *connection_client_setup(
1192 ldap_pvt_thread_start_t *func,
1196 ber_socket_t sfd = SLAP_SOCKNEW( s );
1198 c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1199 CONN_IS_CLIENT, 0, NULL
1200 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1202 c->c_clientfunc = func;
1203 c->c_clientarg = arg;
1205 slapd_add_internal( sfd, 0 );
1210 void connection_client_enable(
1213 slapd_set_read( c->c_sd, 1 );
1216 void connection_client_stop(
1220 ber_socket_t s = c->c_sd;
1222 /* get (locked) connection */
1223 c = connection_get( s );
1225 assert( c->c_conn_state == SLAP_C_CLIENT );
1227 c->c_listener = NULL;
1228 c->c_conn_state = SLAP_C_INVALID;
1229 c->c_struct_state = SLAP_C_UNUSED;
1230 c->c_sd = AC_SOCKET_INVALID;
1231 c->c_close_reason = "?"; /* should never be needed */
1233 c->c_sb = ber_sockbuf_alloc( );
1235 ber_len_t max = sockbuf_max_incoming;
1236 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1238 slapd_remove( s, sb, 0, 1, 0 );
1240 connection_return( c );
1243 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1245 static void* connection_read_thread( void* ctx, void* argv )
1248 conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1249 ber_socket_t s = (long)argv;
1252 * read incoming LDAP requests. If there is more than one,
1253 * the first one is returned with new_op
1256 if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1257 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1258 return (void*)(long)rc;
1261 /* execute a single queued request in the same thread */
1262 if( cri.op && !cri.nullop ) {
1263 rc = (long)connection_operation( ctx, cri.op );
1264 } else if ( cri.func ) {
1265 rc = (long)cri.func( ctx, cri.arg );
1268 return (void*)(long)rc;
1271 int connection_read_activate( ber_socket_t s )
1276 * suspend reading on this file descriptor until a connection processing
1277 * thread reads data on it. Otherwise the listener thread will repeatedly
1278 * submit the same event on it to the pool.
1280 rc = slapd_clr_read( s, 0 );
1284 /* Don't let blocked writers block a pause request */
1285 if ( connections[s].c_writewaiter &&
1286 ldap_pvt_thread_pool_pausing( &connection_pool ))
1287 connection_wake_writers( &connections[s] );
1289 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1290 connection_read_thread, (void *)(long)s );
1293 Debug( LDAP_DEBUG_ANY,
1294 "connection_read_activate(%d): submit failed (%d)\n",
1302 connection_read( ber_socket_t s, conn_readinfo *cri )
1307 assert( connections != NULL );
1309 /* get (locked) connection */
1310 c = connection_get( s );
1313 Debug( LDAP_DEBUG_ANY,
1314 "connection_read(%ld): no connection!\n",
1322 if( c->c_conn_state == SLAP_C_CLOSING ) {
1323 Debug( LDAP_DEBUG_CONNS,
1324 "connection_read(%d): closing, ignoring input for id=%lu\n",
1325 s, c->c_connid, 0 );
1326 connection_return( c );
1330 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1331 cri->func = c->c_clientfunc;
1332 cri->arg = c->c_clientarg;
1333 /* read should already be cleared */
1334 connection_return( c );
1338 Debug( LDAP_DEBUG_TRACE,
1339 "connection_read(%d): checking for input on id=%lu\n",
1340 s, c->c_connid, 0 );
1343 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1344 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1346 Debug( LDAP_DEBUG_TRACE,
1347 "connection_read(%d): TLS accept failure "
1348 "error=%d id=%lu, closing\n",
1349 s, rc, c->c_connid );
1351 c->c_needs_tls_accept = 0;
1352 /* c_mutex is locked */
1353 connection_closing( c, "TLS negotiation failure" );
1354 connection_close( c );
1355 connection_return( c );
1358 } else if ( rc == 0 ) {
1360 struct berval authid = BER_BVNULL;
1362 c->c_needs_tls_accept = 0;
1364 /* we need to let SASL know */
1365 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1367 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1368 if( c->c_tls_ssf > c->c_ssf ) {
1369 c->c_ssf = c->c_tls_ssf;
1372 rc = dnX509peerNormalize( ssl, &authid );
1373 if ( rc != LDAP_SUCCESS ) {
1374 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1375 "unable to get TLS client DN, error=%d id=%lu\n",
1376 s, rc, c->c_connid );
1378 Statslog( LDAP_DEBUG_STATS,
1379 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1380 c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1381 slap_sasl_external( c, c->c_tls_ssf, &authid );
1382 if ( authid.bv_val ) free( authid.bv_val );
1385 /* if success and data is ready, fall thru to data input loop */
1386 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1388 slapd_set_read( s, 1 );
1389 connection_return( c );
1395 #ifdef HAVE_CYRUS_SASL
1396 if ( c->c_sasl_layers ) {
1397 /* If previous layer is not removed yet, give up for now */
1398 if ( !c->c_sasl_sockctx ) {
1399 slapd_set_read( s, 1 );
1400 connection_return( c );
1404 c->c_sasl_layers = 0;
1406 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1407 if( rc != LDAP_SUCCESS ) {
1408 Debug( LDAP_DEBUG_TRACE,
1409 "connection_read(%d): SASL install error "
1410 "error=%d id=%lu, closing\n",
1411 s, rc, c->c_connid );
1413 /* c_mutex is locked */
1414 connection_closing( c, "SASL layer install failure" );
1415 connection_close( c );
1416 connection_return( c );
1422 #define CONNECTION_INPUT_LOOP 1
1423 /* #define DATA_READY_LOOP 1 */
1426 /* How do we do this without getting into a busy loop ? */
1427 rc = connection_input( c, cri );
1429 #ifdef DATA_READY_LOOP
1430 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1431 #elif defined CONNECTION_INPUT_LOOP
1438 Debug( LDAP_DEBUG_CONNS,
1439 "connection_read(%d): input error=%d id=%lu, closing.\n",
1440 s, rc, c->c_connid );
1442 /* c_mutex is locked */
1443 connection_closing( c, conn_lost_str );
1444 connection_close( c );
1445 connection_return( c );
1449 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1450 slapd_set_write( s, 0 );
1453 slapd_set_read( s, 1 );
1454 connection_return( c );
1460 connection_input( Connection *conn , conn_readinfo *cri )
1468 #ifdef LDAP_CONNECTIONLESS
1475 if ( conn->c_currentber == NULL &&
1476 ( conn->c_currentber = ber_alloc()) == NULL )
1478 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1484 #ifdef LDAP_CONNECTIONLESS
1485 if ( conn->c_is_udp ) {
1486 char peername[sizeof("IP=255.255.255.255:65336")];
1488 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1489 if (len != sizeof(struct sockaddr)) return 1;
1491 sprintf( peername, "IP=%s:%d",
1492 inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1493 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1494 Statslog( LDAP_DEBUG_STATS,
1495 "conn=%lu UDP request from %s (%s) accepted.\n",
1496 conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1500 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1501 if ( tag != LDAP_TAG_MESSAGE ) {
1502 int err = sock_errno();
1504 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1505 /* log, close and send error */
1506 Debug( LDAP_DEBUG_TRACE,
1507 "ber_get_next on fd %d failed errno=%d (%s)\n",
1508 conn->c_sd, err, sock_errstr(err) );
1509 ber_free( conn->c_currentber, 1 );
1510 conn->c_currentber = NULL;
1517 ber = conn->c_currentber;
1518 conn->c_currentber = NULL;
1520 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1521 /* log, close and send error */
1522 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1527 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1528 /* log, close and send error */
1529 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1535 #ifdef LDAP_CONNECTIONLESS
1536 if( conn->c_is_udp ) {
1537 if( tag == LBER_OCTETSTRING ) {
1538 ber_get_stringa( ber, &cdn );
1539 tag = ber_peek_tag(ber, &len);
1541 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1542 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1549 if(tag == LDAP_REQ_BIND) {
1550 /* immediately abandon all existing operations upon BIND */
1551 connection_abandon( conn );
1555 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1557 Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1558 (long) op->o_time, 0);
1561 /* clear state if the connection is being reused from inactive */
1562 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1563 memset( &conn->c_pagedresults_state, 0,
1564 sizeof( conn->c_pagedresults_state ) );
1567 op->o_res_ber = NULL;
1569 #ifdef LDAP_CONNECTIONLESS
1570 if (conn->c_is_udp) {
1572 ber_str2bv( cdn, 0, 1, &op->o_dn );
1573 op->o_protocol = LDAP_VERSION2;
1575 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1576 if (op->o_res_ber == NULL) return 1;
1578 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1579 sizeof(struct sockaddr), 0 );
1581 if (rc != sizeof(struct sockaddr)) {
1582 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1586 if (op->o_protocol == LDAP_VERSION2) {
1587 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1589 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1594 #endif /* LDAP_CONNECTIONLESS */
1598 /* Don't process requests when the conn is in the middle of a
1599 * Bind, or if it's closing. Also, don't let any single conn
1600 * use up all the available threads, and don't execute if we're
1601 * currently blocked on output. And don't execute if there are
1602 * already pending ops, let them go first. Abandon operations
1603 * get exceptions to some, but not all, cases.
1607 /* Abandon and Unbind are exempt from these checks */
1608 if (conn->c_conn_state == SLAP_C_CLOSING) {
1611 } else if (conn->c_writewaiter) {
1612 defer = "awaiting write";
1614 } else if (conn->c_n_ops_pending) {
1615 defer = "pending operations";
1619 case LDAP_REQ_ABANDON:
1620 /* Unbind is exempt from these checks */
1621 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1622 defer = "too many executing";
1624 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1629 case LDAP_REQ_UNBIND:
1634 int max = conn->c_dn.bv_len
1635 ? slap_conn_max_pending_auth
1636 : slap_conn_max_pending;
1638 Debug( LDAP_DEBUG_ANY,
1639 "connection_input: conn=%lu deferring operation: %s\n",
1640 conn->c_connid, defer, 0 );
1641 conn->c_n_ops_pending++;
1642 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1643 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1646 conn->c_n_ops_executing++;
1649 * The first op will be processed in the same thread context,
1650 * as long as there is only one op total.
1651 * Subsequent ops will be submitted to the pool by
1652 * calling connection_op_activate()
1654 if ( cri->op == NULL ) {
1655 /* the first incoming request */
1656 connection_op_queue( op );
1659 if ( !cri->nullop ) {
1661 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1662 connection_operation, (void *) cri->op );
1664 connection_op_activate( op );
1669 if ( conn->c_struct_state != SLAP_C_USED ) {
1670 /* connection must have got closed underneath us */
1675 assert( conn->c_struct_state == SLAP_C_USED );
1680 connection_resched( Connection *conn )
1684 if( conn->c_writewaiter )
1687 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1688 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1689 "attempting closing conn=%lu sd=%d\n",
1690 conn->c_connid, conn->c_sd, 0 );
1691 connection_close( conn );
1695 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1696 /* other states need different handling */
1700 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1701 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1703 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1704 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1706 /* pending operations should not be marked for abandonment */
1707 assert(!op->o_abandon);
1709 conn->c_n_ops_pending--;
1710 conn->c_n_ops_executing++;
1712 connection_op_activate( op );
1714 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1720 connection_init_log_prefix( Operation *op )
1722 if ( op->o_connid == (unsigned long)(-1) ) {
1723 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1724 "conn=-1 op=%lu", op->o_opid );
1727 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1728 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1732 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1734 op->o_conn->c_sasl_bindop = NULL;
1736 ch_free( op->o_callback );
1737 op->o_callback = NULL;
1739 return SLAP_CB_CONTINUE;
1742 static int connection_bind_cb( Operation *op, SlapReply *rs )
1744 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1745 op->o_conn->c_sasl_bind_in_progress =
1746 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1748 /* Moved here from bind.c due to ITS#4158 */
1749 op->o_conn->c_sasl_bindop = NULL;
1750 if ( op->orb_method == LDAP_AUTH_SASL ) {
1751 if( rs->sr_err == LDAP_SUCCESS ) {
1752 ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1753 if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1754 /* edn is always normalized already */
1755 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1757 op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1758 BER_BVZERO( &op->orb_edn );
1759 op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1760 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1762 op->o_conn->c_sasl_ssf = op->orb_ssf;
1763 if( op->orb_ssf > op->o_conn->c_ssf ) {
1764 op->o_conn->c_ssf = op->orb_ssf;
1767 if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1768 ber_len_t max = sockbuf_max_incoming_auth;
1769 ber_sockbuf_ctrl( op->o_conn->c_sb,
1770 LBER_SB_OPT_SET_MAX_INCOMING, &max );
1773 /* log authorization identity */
1774 Statslog( LDAP_DEBUG_STATS,
1775 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1777 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1778 op->o_conn->c_authmech.bv_val,
1779 op->orb_ssf, op->o_conn->c_ssf );
1781 Debug( LDAP_DEBUG_TRACE,
1782 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1783 op->o_conn->c_authmech.bv_val,
1784 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1787 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1788 if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1789 free( op->o_conn->c_sasl_bind_mech.bv_val );
1790 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1794 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1796 ch_free( op->o_callback );
1797 op->o_callback = NULL;
1799 return SLAP_CB_CONTINUE;
1802 static void connection_op_queue( Operation *op )
1804 ber_tag_t tag = op->o_tag;
1806 if (tag == LDAP_REQ_BIND) {
1807 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1808 sc->sc_response = connection_bind_cb;
1809 sc->sc_cleanup = connection_bind_cleanup_cb;
1810 sc->sc_next = op->o_callback;
1811 op->o_callback = sc;
1812 op->o_conn->c_conn_state = SLAP_C_BINDING;
1815 if (!op->o_dn.bv_len) {
1816 op->o_authz = op->o_conn->c_authz;
1817 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1818 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1819 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1821 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1822 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1826 op->o_authtype = op->o_conn->c_authtype;
1827 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1829 if (!op->o_protocol) {
1830 op->o_protocol = op->o_conn->c_protocol
1831 ? op->o_conn->c_protocol : LDAP_VERSION3;
1834 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1835 op->o_protocol > LDAP_VERSION2)
1837 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1840 op->o_connid = op->o_conn->c_connid;
1841 connection_init_log_prefix( op );
1843 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1846 static int connection_op_activate( Operation *op )
1850 connection_op_queue( op );
1852 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1853 connection_operation, (void *) op );
1856 Debug( LDAP_DEBUG_ANY,
1857 "connection_op_activate: submit failed (%d) for conn=%lu\n",
1858 rc, op->o_connid, 0 );
1859 /* should move op to pending list */
1865 int connection_write(ber_socket_t s)
1870 assert( connections != NULL );
1872 slapd_clr_write( s, 0 );
1874 c = connection_get( s );
1876 Debug( LDAP_DEBUG_ANY,
1877 "connection_write(%ld): no connection!\n",
1884 Debug( LDAP_DEBUG_TRACE,
1885 "connection_write(%d): waking output for id=%lu\n",
1886 s, c->c_connid, 0 );
1887 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1888 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1889 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1891 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1892 slapd_set_read( s, 1 );
1894 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1895 slapd_set_write( s, 1 );
1898 /* If there are ops pending because of a writewaiter,
1901 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1902 if ( !c->c_writewaiter ) break;
1903 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1905 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1906 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1908 /* pending operations should not be marked for abandonment */
1909 assert(!op->o_abandon);
1911 c->c_n_ops_pending--;
1912 c->c_n_ops_executing++;
1914 connection_op_activate( op );
1919 connection_return( c );
1924 typedef struct conn_fake_extblock {
1927 } conn_fake_extblock;
1930 connection_fake_destroy(
1934 Connection conn = {0};
1936 Opheader ohdr = {0};
1938 conn_fake_extblock *eb = data;
1941 op.o_hdr->oh_extensions = eb->eb_op;
1942 conn.c_extensions = eb->eb_conn;
1947 ber_memfree_x( eb, NULL );
1948 slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1949 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1954 connection_fake_init(
1956 OperationBuffer *opbuf,
1959 connection_fake_init2( conn, opbuf, ctx, 1 );
1963 operation_fake_init(
1969 /* set memory context */
1970 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
1972 op->o_tmpmfuncs = &slap_sl_mfuncs;
1973 op->o_threadctx = ctx;
1974 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1976 op->o_counters = &slap_counters;
1978 op->o_connid = op->o_conn->c_connid;
1979 connection_init_log_prefix( op );
1984 connection_fake_init2(
1986 OperationBuffer *opbuf,
1990 Operation *op = (Operation *) opbuf;
1992 conn->c_connid = -1;
1993 conn->c_conn_idx = -1;
1994 conn->c_send_ldap_result = slap_send_ldap_result;
1995 conn->c_send_search_entry = slap_send_search_entry;
1996 conn->c_send_search_reference = slap_send_search_reference;
1997 conn->c_send_ldap_extended = slap_send_ldap_extended;
1998 conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
1999 conn->c_listener = (Listener *)&dummy_list;
2000 conn->c_peer_domain = slap_empty_bv;
2001 conn->c_peer_name = slap_empty_bv;
2003 memset( opbuf, 0, sizeof( *opbuf ));
2004 op->o_hdr = &opbuf->ob_hdr;
2005 op->o_controls = opbuf->ob_controls;
2007 operation_fake_init( conn, op, ctx, newmem );
2010 if ( slapi_plugins_used ) {
2011 conn_fake_extblock *eb;
2014 /* Use thread keys to make sure these eventually get cleaned up */
2015 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2017 eb = ch_malloc( sizeof( *eb ));
2018 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2019 slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2020 eb->eb_conn = conn->c_extensions;
2021 eb->eb_op = op->o_hdr->oh_extensions;
2022 ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2023 eb, connection_fake_destroy, NULL, NULL );
2026 conn->c_extensions = eb->eb_conn;
2027 op->o_hdr->oh_extensions = eb->eb_op;
2030 #endif /* LDAP_SLAPI */
2032 slap_op_time( &op->o_time, &op->o_tincr );
2036 connection_assign_nextid( Connection *conn )
2038 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2039 conn->c_connid = conn_nextid++;
2040 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );