2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2013 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>
42 #ifdef LDAP_CONNECTIONLESS
43 #include "../../libraries/liblber/lber-int.h" /* ber_int_sb_read() */
47 #include "slapi/slapi.h"
50 /* protected by connections_mutex */
51 static ldap_pvt_thread_mutex_t connections_mutex;
52 static Connection *connections = NULL;
54 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
55 static unsigned long conn_nextid = SLAPD_SYNC_SYNCCONN_OFFSET;
57 static const char conn_lost_str[] = "connection lost";
60 connection_state2str( int state )
63 case SLAP_C_INVALID: return "!";
64 case SLAP_C_INACTIVE: return "|";
65 case SLAP_C_CLOSING: return "C";
66 case SLAP_C_ACTIVE: return "";
67 case SLAP_C_BINDING: return "B";
68 case SLAP_C_CLIENT: return "L";
74 static Connection* connection_get( ber_socket_t s );
76 typedef struct conn_readinfo {
78 ldap_pvt_thread_start_t *func;
84 static int connection_input( Connection *c, conn_readinfo *cri );
85 static void connection_close( Connection *c );
87 static int connection_op_activate( Operation *op );
88 static void connection_op_queue( Operation *op );
89 static int connection_resched( Connection *conn );
90 static void connection_abandon( Connection *conn );
91 static void connection_destroy( Connection *c );
93 static ldap_pvt_thread_start_t connection_operation;
96 * Initialize connection management infrastructure.
98 int connections_init(void)
102 assert( connections == NULL );
104 if( connections != NULL) {
105 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
110 /* should check return of every call */
111 ldap_pvt_thread_mutex_init( &connections_mutex );
112 ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
114 connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
116 if( connections == NULL ) {
117 Debug( LDAP_DEBUG_ANY, "connections_init: "
118 "allocation (%d*%ld) of connection array failed\n",
119 dtblsize, (long) sizeof(Connection), 0 );
123 assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
124 assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
126 for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
129 * per entry initialization of the Connection array initialization
130 * will be done by connection_init()
137 * Destroy connection management infrastructure.
140 int connections_destroy(void)
144 /* should check return of every call */
146 if( connections == NULL) {
147 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
152 for ( i = 0; i < dtblsize; i++ ) {
153 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
154 ber_sockbuf_free( connections[i].c_sb );
155 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
156 ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
157 ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
158 ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
159 ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
161 if ( slapi_plugins_used ) {
162 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
172 ldap_pvt_thread_mutex_destroy( &connections_mutex );
173 ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
178 * shutdown all connections
180 int connections_shutdown(void)
184 for ( i = 0; i < dtblsize; i++ ) {
185 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
186 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
187 if( connections[i].c_struct_state == SLAP_C_USED ) {
189 /* give persistent clients a chance to cleanup */
190 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
191 ldap_pvt_thread_pool_submit( &connection_pool,
192 connections[i].c_clientfunc, connections[i].c_clientarg );
194 /* c_mutex is locked */
195 connection_closing( &connections[i], "slapd shutdown" );
196 connection_close( &connections[i] );
199 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
207 * Timeout idle connections.
209 int connections_timeout_idle(time_t now)
211 int i = 0, writers = 0;
212 ber_socket_t connindex;
216 old = slapd_get_writetime();
218 for( c = connection_first( &connindex );
220 c = connection_next( c, &connindex ) )
222 /* Don't timeout a slow-running request or a persistent
223 * outbound connection. But if it has a writewaiter, see
224 * if the waiter has been there too long.
226 if(( c->c_n_ops_executing && !c->c_writewaiter)
227 || c->c_conn_state == SLAP_C_CLIENT ) {
231 if( global_idletimeout &&
232 difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
234 connection_closing( c, "idletimeout" );
235 connection_close( c );
239 if ( c->c_writewaiter && global_writetimeout ) {
241 if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
243 connection_closing( c, "writetimeout" );
244 connection_close( c );
250 connection_done( c );
251 if ( old && !writers )
252 slapd_clr_writetime( old );
257 /* Drop all client connections */
258 void connections_drop()
261 ber_socket_t connindex;
263 for( c = connection_first( &connindex );
265 c = connection_next( c, &connindex ) )
267 /* Don't close a slow-running request or a persistent
268 * outbound connection.
270 if(( c->c_n_ops_executing && !c->c_writewaiter)
271 || c->c_conn_state == SLAP_C_CLIENT ) {
274 connection_closing( c, "dropping" );
275 connection_close( c );
277 connection_done( c );
280 static Connection* connection_get( ber_socket_t s )
284 Debug( LDAP_DEBUG_ARGS,
285 "connection_get(%ld)\n",
288 assert( connections != NULL );
290 if(s == AC_SOCKET_INVALID) return NULL;
292 assert( s < dtblsize );
296 ldap_pvt_thread_mutex_lock( &c->c_mutex );
298 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
300 if( c->c_struct_state != SLAP_C_USED ) {
301 /* connection must have been closed due to resched */
303 Debug( LDAP_DEBUG_CONNS,
304 "connection_get(%d): connection not used\n",
306 assert( c->c_conn_state == SLAP_C_INVALID );
307 assert( c->c_sd == AC_SOCKET_INVALID );
309 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
313 Debug( LDAP_DEBUG_TRACE,
314 "connection_get(%d): got connid=%lu\n",
319 assert( c->c_struct_state == SLAP_C_USED );
320 assert( c->c_conn_state != SLAP_C_INVALID );
321 assert( c->c_sd != AC_SOCKET_INVALID );
323 #ifndef SLAPD_MONITOR
324 if ( global_idletimeout > 0 )
325 #endif /* ! SLAPD_MONITOR */
327 c->c_activitytime = slap_get_time();
334 static void connection_return( Connection *c )
336 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
339 Connection * connection_init(
343 const char* peername,
346 struct berval *authid
347 LDAP_PF_LOCAL_SENDMSG_ARG(struct berval *peerbv))
352 ber_socket_t sfd = SLAP_FD2SOCK(s);
354 assert( connections != NULL );
356 assert( listener != NULL );
357 assert( dnsname != NULL );
358 assert( peername != NULL );
361 assert( !( flags & CONN_IS_TLS ));
364 if( s == AC_SOCKET_INVALID ) {
365 Debug( LDAP_DEBUG_ANY,
366 "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
371 assert( s < dtblsize );
373 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
376 assert( c->c_struct_state == SLAP_C_UNUSED );
380 c->c_send_ldap_result = slap_send_ldap_result;
381 c->c_send_search_entry = slap_send_search_entry;
382 c->c_send_search_reference = slap_send_search_reference;
383 c->c_send_ldap_extended = slap_send_ldap_extended;
384 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
386 BER_BVZERO( &c->c_authmech );
387 BER_BVZERO( &c->c_dn );
388 BER_BVZERO( &c->c_ndn );
390 c->c_listener = NULL;
391 BER_BVZERO( &c->c_peer_domain );
392 BER_BVZERO( &c->c_peer_name );
394 LDAP_STAILQ_INIT(&c->c_ops);
395 LDAP_STAILQ_INIT(&c->c_pending_ops);
398 c->c_txn = CONN_TXN_INACTIVE;
399 c->c_txn_backend = NULL;
400 LDAP_STAILQ_INIT(&c->c_txn_ops);
403 BER_BVZERO( &c->c_sasl_bind_mech );
405 c->c_sasl_authctx = NULL;
406 c->c_sasl_sockctx = NULL;
407 c->c_sasl_extra = NULL;
408 c->c_sasl_bindop = NULL;
410 c->c_sb = ber_sockbuf_alloc( );
413 ber_len_t max = sockbuf_max_incoming;
414 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
417 c->c_currentber = NULL;
419 /* should check status of thread calls */
420 ldap_pvt_thread_mutex_init( &c->c_mutex );
421 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
422 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
423 ldap_pvt_thread_cond_init( &c->c_write1_cv );
424 ldap_pvt_thread_cond_init( &c->c_write2_cv );
427 if ( slapi_plugins_used ) {
428 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
433 ldap_pvt_thread_mutex_lock( &c->c_mutex );
435 assert( BER_BVISNULL( &c->c_authmech ) );
436 assert( BER_BVISNULL( &c->c_dn ) );
437 assert( BER_BVISNULL( &c->c_ndn ) );
438 assert( c->c_listener == NULL );
439 assert( BER_BVISNULL( &c->c_peer_domain ) );
440 assert( BER_BVISNULL( &c->c_peer_name ) );
441 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
442 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
444 assert( c->c_txn == CONN_TXN_INACTIVE );
445 assert( c->c_txn_backend == NULL );
446 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
448 assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
449 assert( c->c_sasl_done == 0 );
450 assert( c->c_sasl_authctx == NULL );
451 assert( c->c_sasl_sockctx == NULL );
452 assert( c->c_sasl_extra == NULL );
453 assert( c->c_sasl_bindop == NULL );
454 assert( c->c_currentber == NULL );
455 assert( c->c_writewaiter == 0);
456 assert( c->c_writers == 0);
458 c->c_listener = listener;
461 if ( flags & CONN_IS_CLIENT ) {
463 ldap_pvt_thread_mutex_lock( &connections_mutex );
464 c->c_conn_state = SLAP_C_CLIENT;
465 c->c_struct_state = SLAP_C_USED;
466 ldap_pvt_thread_mutex_unlock( &connections_mutex );
467 c->c_close_reason = "?"; /* should never be needed */
468 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
469 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
474 ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
475 ber_str2bv( peername, 0, 1, &c->c_peer_name );
477 c->c_n_ops_received = 0;
478 c->c_n_ops_executing = 0;
479 c->c_n_ops_pending = 0;
480 c->c_n_ops_completed = 0;
486 /* set to zero until bind, implies LDAP_VERSION3 */
489 #ifndef SLAPD_MONITOR
490 if ( global_idletimeout > 0 )
491 #endif /* ! SLAPD_MONITOR */
493 c->c_activitytime = c->c_starttime = slap_get_time();
496 #ifdef LDAP_CONNECTIONLESS
498 if( flags & CONN_IS_UDP ) {
501 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
502 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
504 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
505 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
506 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
507 LBER_SBIOD_LEVEL_PROVIDER, NULL );
509 #endif /* LDAP_CONNECTIONLESS */
511 if ( flags & CONN_IS_IPC ) {
513 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
514 LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
516 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
517 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
518 #ifdef LDAP_PF_LOCAL_SENDMSG
519 if ( !BER_BVISEMPTY( peerbv ))
520 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
523 #endif /* LDAP_PF_LOCAL */
526 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
527 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
529 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
530 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
534 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
535 INT_MAX, (void*)"ldap_" );
538 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
539 c /* non-NULL */ ) < 0 )
541 Debug( LDAP_DEBUG_ANY,
542 "connection_init(%d, %s): set nonblocking failed\n",
543 s, c->c_peer_name.bv_val, 0 );
546 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
547 id = c->c_connid = conn_nextid++;
548 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
550 ldap_pvt_thread_mutex_lock( &connections_mutex );
551 c->c_conn_state = SLAP_C_INACTIVE;
552 c->c_struct_state = SLAP_C_USED;
553 ldap_pvt_thread_mutex_unlock( &connections_mutex );
554 c->c_close_reason = "?"; /* should never be needed */
556 c->c_ssf = c->c_transport_ssf = ssf;
560 if ( flags & CONN_IS_TLS ) {
562 c->c_needs_tls_accept = 1;
565 c->c_needs_tls_accept = 0;
569 slap_sasl_open( c, 0 );
570 slap_sasl_external( c, ssf, authid );
572 slapd_add_internal( s, 1 );
574 backend_connection_init(c);
575 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
580 void connection2anonymous( Connection *c )
582 assert( connections != NULL );
586 ber_len_t max = sockbuf_max_incoming;
587 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
590 if ( !BER_BVISNULL( &c->c_authmech ) ) {
591 ch_free(c->c_authmech.bv_val);
593 BER_BVZERO( &c->c_authmech );
595 if ( !BER_BVISNULL( &c->c_dn ) ) {
596 ch_free(c->c_dn.bv_val);
598 BER_BVZERO( &c->c_dn );
600 if ( !BER_BVISNULL( &c->c_ndn ) ) {
601 ch_free(c->c_ndn.bv_val);
603 BER_BVZERO( &c->c_ndn );
605 if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
606 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
608 BER_BVZERO( &c->c_sasl_authz_dn );
610 c->c_authz_backend = NULL;
614 connection_destroy( Connection *c )
616 unsigned long connid;
617 const char *close_reason;
621 assert( connections != NULL );
623 assert( c->c_struct_state != SLAP_C_UNUSED );
624 assert( c->c_conn_state != SLAP_C_INVALID );
625 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
626 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
628 assert( c->c_txn == CONN_TXN_INACTIVE );
629 assert( c->c_txn_backend == NULL );
630 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
632 assert( c->c_writewaiter == 0);
633 assert( c->c_writers == 0);
635 /* only for stats (print -1 as "%lu" may give unexpected results ;) */
636 connid = c->c_connid;
637 close_reason = c->c_close_reason;
639 ldap_pvt_thread_mutex_lock( &connections_mutex );
640 c->c_struct_state = SLAP_C_PENDING;
641 ldap_pvt_thread_mutex_unlock( &connections_mutex );
643 backend_connection_destroy(c);
648 c->c_activitytime = c->c_starttime = 0;
650 connection2anonymous( c );
651 c->c_listener = NULL;
653 if(c->c_peer_domain.bv_val != NULL) {
654 free(c->c_peer_domain.bv_val);
656 BER_BVZERO( &c->c_peer_domain );
657 if(c->c_peer_name.bv_val != NULL) {
658 free(c->c_peer_name.bv_val);
660 BER_BVZERO( &c->c_peer_name );
662 c->c_sasl_bind_in_progress = 0;
663 if(c->c_sasl_bind_mech.bv_val != NULL) {
664 free(c->c_sasl_bind_mech.bv_val);
666 BER_BVZERO( &c->c_sasl_bind_mech );
668 slap_sasl_close( c );
670 if ( c->c_currentber != NULL ) {
671 ber_free( c->c_currentber, 1 );
672 c->c_currentber = NULL;
677 /* call destructors, then constructors; avoids unnecessary allocation */
678 if ( slapi_plugins_used ) {
679 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
684 c->c_sd = AC_SOCKET_INVALID;
685 c->c_conn_state = SLAP_C_INVALID;
686 c->c_struct_state = SLAP_C_UNUSED;
687 c->c_close_reason = "?"; /* should never be needed */
690 c->c_sb = ber_sockbuf_alloc( );
692 ber_len_t max = sockbuf_max_incoming;
693 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
696 /* c must be fully reset by this point; when we call slapd_remove
697 * it may get immediately reused by a new connection.
699 if ( sd != AC_SOCKET_INVALID ) {
700 slapd_remove( sd, sb, 1, 0, 0 );
702 if ( close_reason == NULL ) {
703 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
704 connid, (long) sd, 0, 0, 0 );
706 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
707 connid, (long) sd, close_reason, 0, 0 );
712 int connection_valid( Connection *c )
714 /* c_mutex must be locked by caller */
718 return c->c_struct_state == SLAP_C_USED &&
719 c->c_conn_state >= SLAP_C_ACTIVE &&
720 c->c_conn_state <= SLAP_C_CLIENT;
723 static void connection_abandon( Connection *c )
725 /* c_mutex must be locked by caller */
727 Operation *o, *next, op = {0};
732 op.o_connid = c->c_connid;
733 op.o_tag = LDAP_REQ_ABANDON;
735 for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
736 SlapReply rs = {REP_RESULT};
738 next = LDAP_STAILQ_NEXT( o, o_next );
739 op.orn_msgid = o->o_msgid;
741 op.o_bd = frontendDB;
742 frontendDB->be_abandon( &op, &rs );
746 /* remove operations in pending transaction */
747 while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
748 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
749 LDAP_STAILQ_NEXT(o, o_next) = NULL;
750 slap_op_free( o, NULL );
753 /* clear transaction */
754 c->c_txn_backend = NULL;
755 c->c_txn = CONN_TXN_INACTIVE;
758 /* remove pending operations */
759 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
760 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
761 LDAP_STAILQ_NEXT(o, o_next) = NULL;
762 slap_op_free( o, NULL );
767 connection_wake_writers( Connection *c )
769 /* wake write blocked operations */
770 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
771 if ( c->c_writers > 0 ) {
772 c->c_writers = -c->c_writers;
773 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
774 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
775 if ( c->c_writewaiter ) {
776 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
777 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
778 slapd_clr_write( c->c_sd, 1 );
779 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
781 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
782 while ( c->c_writers ) {
783 ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
785 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
787 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
788 slapd_clr_write( c->c_sd, 1 );
792 void connection_closing( Connection *c, const char *why )
794 assert( connections != NULL );
797 if ( c->c_struct_state != SLAP_C_USED ) return;
799 assert( c->c_conn_state != SLAP_C_INVALID );
801 /* c_mutex must be locked by caller */
803 if( c->c_conn_state != SLAP_C_CLOSING ) {
804 Debug( LDAP_DEBUG_CONNS,
805 "connection_closing: readying conn=%lu sd=%d for close\n",
806 c->c_connid, c->c_sd, 0 );
807 /* update state to closing */
808 c->c_conn_state = SLAP_C_CLOSING;
809 c->c_close_reason = why;
811 /* don't listen on this port anymore */
812 slapd_clr_read( c->c_sd, 0 );
814 /* abandon active operations */
815 connection_abandon( c );
817 /* wake write blocked operations */
818 connection_wake_writers( c );
820 } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
821 /* Client closed connection after doing Unbind. */
822 c->c_close_reason = NULL;
827 connection_close( Connection *c )
829 assert( connections != NULL );
832 if ( c->c_struct_state != SLAP_C_USED ) return;
834 assert( c->c_conn_state == SLAP_C_CLOSING );
836 /* NOTE: c_mutex should be locked by caller */
838 if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
839 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
841 Debug( LDAP_DEBUG_CONNS,
842 "connection_close: deferring conn=%lu sd=%d\n",
843 c->c_connid, c->c_sd, 0 );
847 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
848 c->c_connid, c->c_sd, 0 );
850 connection_destroy( c );
853 unsigned long connections_nextid(void)
856 assert( connections != NULL );
858 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
862 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
868 * Loop through the connections:
870 * for (c = connection_first(&i); c; c = connection_next(c, &i)) ...;
871 * connection_done(c);
873 * 'i' is the cursor, initialized by connection_first().
874 * 'c_mutex' is locked in the returned connection. The functions must
875 * be passed the previous return value so they can unlock it again.
878 Connection* connection_first( ber_socket_t *index )
880 assert( connections != NULL );
881 assert( index != NULL );
883 ldap_pvt_thread_mutex_lock( &connections_mutex );
884 for( *index = 0; *index < dtblsize; (*index)++) {
885 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
889 ldap_pvt_thread_mutex_unlock( &connections_mutex );
891 return connection_next(NULL, index);
894 /* Next connection in loop, see connection_first() */
895 Connection* connection_next( Connection *c, ber_socket_t *index )
897 assert( connections != NULL );
898 assert( index != NULL );
899 assert( *index <= dtblsize );
901 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
905 ldap_pvt_thread_mutex_lock( &connections_mutex );
906 for(; *index < dtblsize; (*index)++) {
908 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
909 /* FIXME: accessing c_conn_state without locking c_mutex */
910 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
914 if( connections[*index].c_struct_state == SLAP_C_USED ) {
915 c = &connections[(*index)++];
916 if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
918 ldap_pvt_thread_mutex_unlock( &connections_mutex );
919 ldap_pvt_thread_mutex_lock( &c->c_mutex );
920 ldap_pvt_thread_mutex_lock( &connections_mutex );
921 if ( c->c_struct_state != SLAP_C_USED ) {
922 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
927 assert( c->c_conn_state != SLAP_C_INVALID );
931 c_struct = connections[*index].c_struct_state;
932 if ( c_struct == SLAP_C_PENDING )
934 assert( c_struct == SLAP_C_UNUSED );
935 /* FIXME: accessing c_conn_state without locking c_mutex */
936 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
939 ldap_pvt_thread_mutex_unlock( &connections_mutex );
943 /* End connection loop, see connection_first() */
944 void connection_done( Connection *c )
946 assert( connections != NULL );
948 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
952 * connection_activity - handle the request operation op on connection
953 * conn. This routine figures out what kind of operation it is and
954 * calls the appropriate stub to handle it.
958 /* FIXME: returns 0 in case of failure */
959 #define INCR_OP_INITIATED(index) \
961 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
962 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
963 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
965 #define INCR_OP_COMPLETED(index) \
967 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
968 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
969 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
970 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
972 #else /* !SLAPD_MONITOR */
973 #define INCR_OP_INITIATED(index) do { } while (0)
974 #define INCR_OP_COMPLETED(index) \
976 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
977 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
978 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
980 #endif /* !SLAPD_MONITOR */
983 * NOTE: keep in sync with enum in slapd.h
985 static BI_op_func *opfun[] = {
999 /* Counters are per-thread, not per-connection.
1002 conn_counter_destroy( void *key, void *data )
1004 slap_counters_t **prev, *sc;
1006 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1007 for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
1008 prev = &sc->sc_next, sc = sc->sc_next ) {
1012 *prev = sc->sc_next;
1013 /* Copy data to main counter */
1014 ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1015 ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1016 ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1017 ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1018 ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1019 ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1020 #ifdef SLAPD_MONITOR
1021 for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1022 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1023 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1025 #endif /* SLAPD_MONITOR */
1026 slap_counters_destroy( sc );
1027 ber_memfree_x( data, NULL );
1031 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1035 conn_counter_init( Operation *op, void *ctx )
1037 slap_counters_t *sc;
1040 if ( ldap_pvt_thread_pool_getkey(
1041 ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1042 vsc = ch_malloc( sizeof( slap_counters_t ));
1044 slap_counters_init( sc );
1045 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1046 conn_counter_destroy, NULL, NULL );
1048 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1049 sc->sc_next = slap_counters.sc_next;
1050 slap_counters.sc_next = sc;
1051 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1053 op->o_counters = vsc;
1057 connection_operation( void *ctx, void *arg_v )
1059 int rc = LDAP_OTHER, cancel;
1060 Operation *op = arg_v;
1061 SlapReply rs = {REP_RESULT};
1062 ber_tag_t tag = op->o_tag;
1063 slap_op_t opidx = SLAP_OP_LAST;
1064 Connection *conn = op->o_conn;
1065 void *memctx = NULL;
1066 void *memctx_null = NULL;
1069 conn_counter_init( op, ctx );
1070 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1071 /* FIXME: returns 0 in case of failure */
1072 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1073 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1075 op->o_threadctx = ctx;
1076 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1080 case LDAP_REQ_UNBIND:
1082 case LDAP_REQ_DELETE:
1083 case LDAP_REQ_MODDN:
1084 case LDAP_REQ_MODIFY:
1085 case LDAP_REQ_COMPARE:
1086 case LDAP_REQ_SEARCH:
1087 case LDAP_REQ_ABANDON:
1088 case LDAP_REQ_EXTENDED:
1091 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1092 "conn %lu unknown LDAP request 0x%lx\n",
1093 conn->c_connid, tag, 0 );
1094 op->o_tag = LBER_ERROR;
1095 rs.sr_err = LDAP_PROTOCOL_ERROR;
1096 rs.sr_text = "unknown LDAP request";
1097 send_ldap_disconnect( op, &rs );
1098 rc = SLAPD_DISCONNECT;
1099 goto operations_error;
1102 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1103 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1104 "error: SASL bind in progress (tag=%ld).\n",
1106 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1107 "SASL bind in progress" );
1108 rc = LDAP_OPERATIONS_ERROR;
1109 goto operations_error;
1113 if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1114 ( tag == LDAP_REQ_ADD ) ||
1115 ( tag == LDAP_REQ_DELETE ) ||
1116 ( tag == LDAP_REQ_MODIFY ) ||
1117 ( tag == LDAP_REQ_MODRDN )))
1119 /* Disable SLAB allocator for all update operations
1120 issued inside of a transaction */
1121 op->o_tmpmemctx = NULL;
1122 op->o_tmpmfuncs = &ch_mfuncs;
1126 /* We can use Thread-Local storage for most mallocs. We can
1127 * also use TL for ber parsing, but not on Add or Modify.
1130 memsiz = ber_len( op->o_ber ) * 64;
1131 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1133 memsiz = SLAP_SLAB_SIZE;
1135 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1136 op->o_tmpmemctx = memctx;
1137 op->o_tmpmfuncs = &slap_sl_mfuncs;
1138 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1139 /* Note - the ber and its buffer are already allocated from
1140 * regular memory; this only affects subsequent mallocs that
1141 * ber_scanf may invoke.
1143 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1147 opidx = slap_req2op( tag );
1148 assert( opidx != SLAP_OP_LAST );
1149 INCR_OP_INITIATED( opidx );
1150 rc = (*(opfun[opidx]))( op, &rs );
1153 if ( rc == SLAPD_DISCONNECT ) {
1156 } else if ( opidx != SLAP_OP_LAST ) {
1157 /* increment completed operations count
1158 * only if operation was initiated
1159 * and rc != SLAPD_DISCONNECT */
1160 INCR_OP_COMPLETED( opidx );
1163 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1165 if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1166 conn->c_conn_state = SLAP_C_ACTIVE;
1168 cancel = op->o_cancel;
1169 if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1170 if ( cancel == SLAP_CANCEL_REQ ) {
1171 op->o_cancel = rc == SLAPD_ABANDON
1172 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1176 /* Fake a cond_wait with thread_yield, then
1177 * verify the result properly mutex-protected.
1179 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1181 ldap_pvt_thread_yield();
1182 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1183 && cancel != SLAP_CANCEL_DONE );
1184 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1185 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1186 && cancel != SLAP_CANCEL_DONE );
1189 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1191 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1192 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1193 conn->c_n_ops_executing--;
1194 conn->c_n_ops_completed++;
1198 case LDAP_REQ_UNBIND:
1199 /* c_mutex is locked */
1200 connection_closing( conn,
1201 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1205 connection_resched( conn );
1206 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1207 slap_op_free( op, ctx );
1211 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1213 Connection *connection_client_setup(
1215 ldap_pvt_thread_start_t *func,
1219 ber_socket_t sfd = SLAP_SOCKNEW( s );
1221 c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1222 CONN_IS_CLIENT, 0, NULL
1223 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1225 c->c_clientfunc = func;
1226 c->c_clientarg = arg;
1228 slapd_add_internal( sfd, 0 );
1233 void connection_client_enable(
1236 slapd_set_read( c->c_sd, 1 );
1239 void connection_client_stop(
1243 ber_socket_t s = c->c_sd;
1245 /* get (locked) connection */
1246 c = connection_get( s );
1248 assert( c->c_conn_state == SLAP_C_CLIENT );
1250 c->c_listener = NULL;
1251 c->c_conn_state = SLAP_C_INVALID;
1252 c->c_struct_state = SLAP_C_UNUSED;
1253 c->c_sd = AC_SOCKET_INVALID;
1254 c->c_close_reason = "?"; /* should never be needed */
1256 c->c_sb = ber_sockbuf_alloc( );
1258 ber_len_t max = sockbuf_max_incoming;
1259 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1261 slapd_remove( s, sb, 0, 1, 0 );
1263 connection_return( c );
1266 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1268 static void* connection_read_thread( void* ctx, void* argv )
1271 conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1272 ber_socket_t s = (long)argv;
1275 * read incoming LDAP requests. If there is more than one,
1276 * the first one is returned with new_op
1279 if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1280 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1281 return (void*)(long)rc;
1284 /* execute a single queued request in the same thread */
1285 if( cri.op && !cri.nullop ) {
1286 rc = (long)connection_operation( ctx, cri.op );
1287 } else if ( cri.func ) {
1288 rc = (long)cri.func( ctx, cri.arg );
1291 return (void*)(long)rc;
1294 int connection_read_activate( ber_socket_t s )
1299 * suspend reading on this file descriptor until a connection processing
1300 * thread reads data on it. Otherwise the listener thread will repeatedly
1301 * submit the same event on it to the pool.
1303 rc = slapd_clr_read( s, 0 );
1307 /* Don't let blocked writers block a pause request */
1308 if ( connections[s].c_writewaiter &&
1309 ldap_pvt_thread_pool_pausing( &connection_pool ))
1310 connection_wake_writers( &connections[s] );
1312 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1313 connection_read_thread, (void *)(long)s );
1316 Debug( LDAP_DEBUG_ANY,
1317 "connection_read_activate(%d): submit failed (%d)\n",
1325 connection_read( ber_socket_t s, conn_readinfo *cri )
1330 assert( connections != NULL );
1332 /* get (locked) connection */
1333 c = connection_get( s );
1336 Debug( LDAP_DEBUG_ANY,
1337 "connection_read(%ld): no connection!\n",
1345 if( c->c_conn_state == SLAP_C_CLOSING ) {
1346 Debug( LDAP_DEBUG_CONNS,
1347 "connection_read(%d): closing, ignoring input for id=%lu\n",
1348 s, c->c_connid, 0 );
1349 connection_return( c );
1353 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1354 cri->func = c->c_clientfunc;
1355 cri->arg = c->c_clientarg;
1356 /* read should already be cleared */
1357 connection_return( c );
1361 Debug( LDAP_DEBUG_TRACE,
1362 "connection_read(%d): checking for input on id=%lu\n",
1363 s, c->c_connid, 0 );
1366 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1367 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1369 Debug( LDAP_DEBUG_TRACE,
1370 "connection_read(%d): TLS accept failure "
1371 "error=%d id=%lu, closing\n",
1372 s, rc, c->c_connid );
1374 c->c_needs_tls_accept = 0;
1375 /* c_mutex is locked */
1376 connection_closing( c, "TLS negotiation failure" );
1377 connection_close( c );
1378 connection_return( c );
1381 } else if ( rc == 0 ) {
1383 struct berval authid = BER_BVNULL;
1385 c->c_needs_tls_accept = 0;
1387 /* we need to let SASL know */
1388 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1390 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1391 if( c->c_tls_ssf > c->c_ssf ) {
1392 c->c_ssf = c->c_tls_ssf;
1395 rc = dnX509peerNormalize( ssl, &authid );
1396 if ( rc != LDAP_SUCCESS ) {
1397 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1398 "unable to get TLS client DN, error=%d id=%lu\n",
1399 s, rc, c->c_connid );
1401 Statslog( LDAP_DEBUG_STATS,
1402 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1403 c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1404 slap_sasl_external( c, c->c_tls_ssf, &authid );
1405 if ( authid.bv_val ) free( authid.bv_val );
1406 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1407 LBER_SB_OPT_NEEDS_WRITE, NULL )) { /* need to retry */
1408 slapd_set_write( s, 1 );
1409 connection_return( c );
1413 /* if success and data is ready, fall thru to data input loop */
1414 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1416 slapd_set_read( s, 1 );
1417 connection_return( c );
1423 #ifdef HAVE_CYRUS_SASL
1424 if ( c->c_sasl_layers ) {
1425 /* If previous layer is not removed yet, give up for now */
1426 if ( !c->c_sasl_sockctx ) {
1427 slapd_set_read( s, 1 );
1428 connection_return( c );
1432 c->c_sasl_layers = 0;
1434 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1435 if( rc != LDAP_SUCCESS ) {
1436 Debug( LDAP_DEBUG_TRACE,
1437 "connection_read(%d): SASL install error "
1438 "error=%d id=%lu, closing\n",
1439 s, rc, c->c_connid );
1441 /* c_mutex is locked */
1442 connection_closing( c, "SASL layer install failure" );
1443 connection_close( c );
1444 connection_return( c );
1450 #define CONNECTION_INPUT_LOOP 1
1451 /* #define DATA_READY_LOOP 1 */
1454 /* How do we do this without getting into a busy loop ? */
1455 rc = connection_input( c, cri );
1457 #ifdef DATA_READY_LOOP
1458 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1459 #elif defined CONNECTION_INPUT_LOOP
1466 Debug( LDAP_DEBUG_CONNS,
1467 "connection_read(%d): input error=%d id=%lu, closing.\n",
1468 s, rc, c->c_connid );
1470 /* c_mutex is locked */
1471 connection_closing( c, conn_lost_str );
1472 connection_close( c );
1473 connection_return( c );
1477 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1478 slapd_set_write( s, 0 );
1481 slapd_set_read( s, 1 );
1482 connection_return( c );
1488 connection_input( Connection *conn , conn_readinfo *cri )
1496 #ifdef LDAP_CONNECTIONLESS
1503 if ( conn->c_currentber == NULL &&
1504 ( conn->c_currentber = ber_alloc()) == NULL )
1506 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1512 #ifdef LDAP_CONNECTIONLESS
1513 if ( conn->c_is_udp ) {
1514 char peername[sizeof("IP=255.255.255.255:65336")];
1515 const char *peeraddr_string = NULL;
1517 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1518 if (len != sizeof(struct sockaddr)) return 1;
1520 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1521 char addr[INET_ADDRSTRLEN];
1522 peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1523 addr, sizeof(addr) );
1524 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1525 peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1526 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1527 sprintf( peername, "IP=%s:%d",
1529 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1530 Statslog( LDAP_DEBUG_STATS,
1531 "conn=%lu UDP request from %s (%s) accepted.\n",
1532 conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1536 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1537 if ( tag != LDAP_TAG_MESSAGE ) {
1538 int err = sock_errno();
1540 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1541 /* log, close and send error */
1542 Debug( LDAP_DEBUG_TRACE,
1543 "ber_get_next on fd %d failed errno=%d (%s)\n",
1544 conn->c_sd, err, sock_errstr(err) );
1545 ber_free( conn->c_currentber, 1 );
1546 conn->c_currentber = NULL;
1553 ber = conn->c_currentber;
1554 conn->c_currentber = NULL;
1556 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1557 /* log, close and send error */
1558 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1563 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1564 /* log, close and send error */
1565 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1571 #ifdef LDAP_CONNECTIONLESS
1572 if( conn->c_is_udp ) {
1573 if( tag == LBER_OCTETSTRING ) {
1574 if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1575 tag = ber_peek_tag( ber, &len );
1577 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1578 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1585 if(tag == LDAP_REQ_BIND) {
1586 /* immediately abandon all existing operations upon BIND */
1587 connection_abandon( conn );
1591 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1593 Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1594 (long) op->o_time, 0);
1597 /* clear state if the connection is being reused from inactive */
1598 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1599 memset( &conn->c_pagedresults_state, 0,
1600 sizeof( conn->c_pagedresults_state ) );
1603 op->o_res_ber = NULL;
1605 #ifdef LDAP_CONNECTIONLESS
1606 if (conn->c_is_udp) {
1608 ber_str2bv( cdn, 0, 1, &op->o_dn );
1609 op->o_protocol = LDAP_VERSION2;
1611 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1612 if (op->o_res_ber == NULL) return 1;
1614 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1615 sizeof(struct sockaddr), 0 );
1617 if (rc != sizeof(struct sockaddr)) {
1618 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1622 if (op->o_protocol == LDAP_VERSION2) {
1623 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1625 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1630 #endif /* LDAP_CONNECTIONLESS */
1634 /* Don't process requests when the conn is in the middle of a
1635 * Bind, or if it's closing. Also, don't let any single conn
1636 * use up all the available threads, and don't execute if we're
1637 * currently blocked on output. And don't execute if there are
1638 * already pending ops, let them go first. Abandon operations
1639 * get exceptions to some, but not all, cases.
1643 /* Abandon and Unbind are exempt from these checks */
1644 if (conn->c_conn_state == SLAP_C_CLOSING) {
1647 } else if (conn->c_writewaiter) {
1648 defer = "awaiting write";
1650 } else if (conn->c_n_ops_pending) {
1651 defer = "pending operations";
1655 case LDAP_REQ_ABANDON:
1656 /* Unbind is exempt from these checks */
1657 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1658 defer = "too many executing";
1660 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1665 case LDAP_REQ_UNBIND:
1670 int max = conn->c_dn.bv_len
1671 ? slap_conn_max_pending_auth
1672 : slap_conn_max_pending;
1674 Debug( LDAP_DEBUG_ANY,
1675 "connection_input: conn=%lu deferring operation: %s\n",
1676 conn->c_connid, defer, 0 );
1677 conn->c_n_ops_pending++;
1678 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1679 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1682 conn->c_n_ops_executing++;
1685 * The first op will be processed in the same thread context,
1686 * as long as there is only one op total.
1687 * Subsequent ops will be submitted to the pool by
1688 * calling connection_op_activate()
1690 if ( cri->op == NULL ) {
1691 /* the first incoming request */
1692 connection_op_queue( op );
1695 if ( !cri->nullop ) {
1697 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1698 connection_operation, (void *) cri->op );
1700 connection_op_activate( op );
1705 if ( conn->c_struct_state != SLAP_C_USED ) {
1706 /* connection must have got closed underneath us */
1711 assert( conn->c_struct_state == SLAP_C_USED );
1716 connection_resched( Connection *conn )
1720 if( conn->c_writewaiter )
1723 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1724 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1725 "attempting closing conn=%lu sd=%d\n",
1726 conn->c_connid, conn->c_sd, 0 );
1727 connection_close( conn );
1731 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1732 /* other states need different handling */
1736 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1737 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1739 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1740 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1742 /* pending operations should not be marked for abandonment */
1743 assert(!op->o_abandon);
1745 conn->c_n_ops_pending--;
1746 conn->c_n_ops_executing++;
1748 connection_op_activate( op );
1750 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1756 connection_init_log_prefix( Operation *op )
1758 if ( op->o_connid == (unsigned long)(-1) ) {
1759 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1760 "conn=-1 op=%lu", op->o_opid );
1763 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1764 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1768 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1770 op->o_conn->c_sasl_bindop = NULL;
1772 ch_free( op->o_callback );
1773 op->o_callback = NULL;
1775 return SLAP_CB_CONTINUE;
1778 static int connection_bind_cb( Operation *op, SlapReply *rs )
1780 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1781 op->o_conn->c_sasl_bind_in_progress =
1782 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1784 /* Moved here from bind.c due to ITS#4158 */
1785 op->o_conn->c_sasl_bindop = NULL;
1786 if ( op->orb_method == LDAP_AUTH_SASL ) {
1787 if( rs->sr_err == LDAP_SUCCESS ) {
1788 ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1789 if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1790 /* edn is always normalized already */
1791 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1793 op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1794 BER_BVZERO( &op->orb_edn );
1795 op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1796 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1798 op->o_conn->c_sasl_ssf = op->orb_ssf;
1799 if( op->orb_ssf > op->o_conn->c_ssf ) {
1800 op->o_conn->c_ssf = op->orb_ssf;
1803 if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1804 ber_len_t max = sockbuf_max_incoming_auth;
1805 ber_sockbuf_ctrl( op->o_conn->c_sb,
1806 LBER_SB_OPT_SET_MAX_INCOMING, &max );
1809 /* log authorization identity */
1810 Statslog( LDAP_DEBUG_STATS,
1811 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1813 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1814 op->o_conn->c_authmech.bv_val,
1815 op->orb_ssf, op->o_conn->c_ssf );
1817 Debug( LDAP_DEBUG_TRACE,
1818 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1819 op->o_conn->c_authmech.bv_val,
1820 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1823 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1824 if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1825 free( op->o_conn->c_sasl_bind_mech.bv_val );
1826 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1830 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1832 ch_free( op->o_callback );
1833 op->o_callback = NULL;
1835 return SLAP_CB_CONTINUE;
1838 static void connection_op_queue( Operation *op )
1840 ber_tag_t tag = op->o_tag;
1842 if (tag == LDAP_REQ_BIND) {
1843 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1844 sc->sc_response = connection_bind_cb;
1845 sc->sc_cleanup = connection_bind_cleanup_cb;
1846 sc->sc_next = op->o_callback;
1847 op->o_callback = sc;
1848 op->o_conn->c_conn_state = SLAP_C_BINDING;
1851 if (!op->o_dn.bv_len) {
1852 op->o_authz = op->o_conn->c_authz;
1853 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1854 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1855 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1857 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1858 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1862 op->o_authtype = op->o_conn->c_authtype;
1863 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1865 if (!op->o_protocol) {
1866 op->o_protocol = op->o_conn->c_protocol
1867 ? op->o_conn->c_protocol : LDAP_VERSION3;
1870 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1871 op->o_protocol > LDAP_VERSION2)
1873 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1876 op->o_connid = op->o_conn->c_connid;
1877 connection_init_log_prefix( op );
1879 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1882 static int connection_op_activate( Operation *op )
1886 connection_op_queue( op );
1888 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1889 connection_operation, (void *) op );
1892 Debug( LDAP_DEBUG_ANY,
1893 "connection_op_activate: submit failed (%d) for conn=%lu\n",
1894 rc, op->o_connid, 0 );
1895 /* should move op to pending list */
1901 int connection_write(ber_socket_t s)
1906 assert( connections != NULL );
1908 c = connection_get( s );
1910 Debug( LDAP_DEBUG_ANY,
1911 "connection_write(%ld): no connection!\n",
1916 slapd_clr_write( s, 0 );
1919 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1920 connection_return( c );
1921 connection_read_activate( s );
1928 Debug( LDAP_DEBUG_TRACE,
1929 "connection_write(%d): waking output for id=%lu\n",
1930 s, c->c_connid, 0 );
1931 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1932 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1933 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1935 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1936 slapd_set_read( s, 1 );
1938 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1939 slapd_set_write( s, 1 );
1942 /* If there are ops pending because of a writewaiter,
1945 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1946 if ( !c->c_writewaiter ) break;
1947 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1949 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1950 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1952 /* pending operations should not be marked for abandonment */
1953 assert(!op->o_abandon);
1955 c->c_n_ops_pending--;
1956 c->c_n_ops_executing++;
1958 connection_op_activate( op );
1963 connection_return( c );
1968 typedef struct conn_fake_extblock {
1971 } conn_fake_extblock;
1974 connection_fake_destroy(
1978 Connection conn = {0};
1980 Opheader ohdr = {0};
1982 conn_fake_extblock *eb = data;
1985 op.o_hdr->oh_extensions = eb->eb_op;
1986 conn.c_extensions = eb->eb_conn;
1991 ber_memfree_x( eb, NULL );
1992 slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1993 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1998 connection_fake_init(
2000 OperationBuffer *opbuf,
2003 connection_fake_init2( conn, opbuf, ctx, 1 );
2007 operation_fake_init(
2013 /* set memory context */
2014 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2016 op->o_tmpmfuncs = &slap_sl_mfuncs;
2017 op->o_threadctx = ctx;
2018 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2020 op->o_counters = &slap_counters;
2022 op->o_connid = op->o_conn->c_connid;
2023 connection_init_log_prefix( op );
2028 connection_fake_init2(
2030 OperationBuffer *opbuf,
2034 Operation *op = (Operation *) opbuf;
2036 conn->c_connid = -1;
2037 conn->c_conn_idx = -1;
2038 conn->c_send_ldap_result = slap_send_ldap_result;
2039 conn->c_send_search_entry = slap_send_search_entry;
2040 conn->c_send_search_reference = slap_send_search_reference;
2041 conn->c_send_ldap_extended = slap_send_ldap_extended;
2042 conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2043 conn->c_listener = (Listener *)&dummy_list;
2044 conn->c_peer_domain = slap_empty_bv;
2045 conn->c_peer_name = slap_empty_bv;
2047 memset( opbuf, 0, sizeof( *opbuf ));
2048 op->o_hdr = &opbuf->ob_hdr;
2049 op->o_controls = opbuf->ob_controls;
2051 operation_fake_init( conn, op, ctx, newmem );
2054 if ( slapi_plugins_used ) {
2055 conn_fake_extblock *eb;
2058 /* Use thread keys to make sure these eventually get cleaned up */
2059 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2061 eb = ch_malloc( sizeof( *eb ));
2062 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2063 slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2064 eb->eb_conn = conn->c_extensions;
2065 eb->eb_op = op->o_hdr->oh_extensions;
2066 ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2067 eb, connection_fake_destroy, NULL, NULL );
2070 conn->c_extensions = eb->eb_conn;
2071 op->o_hdr->oh_extensions = eb->eb_op;
2074 #endif /* LDAP_SLAPI */
2076 slap_op_time( &op->o_time, &op->o_tincr );
2080 connection_assign_nextid( Connection *conn )
2082 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2083 conn->c_connid = conn_nextid++;
2084 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );