2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2012 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;
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()
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 );
867 Connection* connection_first( ber_socket_t *index )
869 assert( connections != NULL );
870 assert( index != NULL );
872 ldap_pvt_thread_mutex_lock( &connections_mutex );
873 for( *index = 0; *index < dtblsize; (*index)++) {
874 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
878 ldap_pvt_thread_mutex_unlock( &connections_mutex );
880 return connection_next(NULL, index);
883 Connection* connection_next( Connection *c, ber_socket_t *index )
885 assert( connections != NULL );
886 assert( index != NULL );
887 assert( *index <= dtblsize );
889 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
893 ldap_pvt_thread_mutex_lock( &connections_mutex );
894 for(; *index < dtblsize; (*index)++) {
896 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
897 /* FIXME: accessing c_conn_state without locking c_mutex */
898 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
902 if( connections[*index].c_struct_state == SLAP_C_USED ) {
903 c = &connections[(*index)++];
904 if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
906 ldap_pvt_thread_mutex_unlock( &connections_mutex );
907 ldap_pvt_thread_mutex_lock( &c->c_mutex );
908 ldap_pvt_thread_mutex_lock( &connections_mutex );
909 if ( c->c_struct_state != SLAP_C_USED ) {
910 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
915 assert( c->c_conn_state != SLAP_C_INVALID );
919 c_struct = connections[*index].c_struct_state;
920 if ( c_struct == SLAP_C_PENDING )
922 assert( c_struct == SLAP_C_UNUSED );
923 /* FIXME: accessing c_conn_state without locking c_mutex */
924 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
927 ldap_pvt_thread_mutex_unlock( &connections_mutex );
931 void connection_done( Connection *c )
933 assert( connections != NULL );
935 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
939 * connection_activity - handle the request operation op on connection
940 * conn. This routine figures out what kind of operation it is and
941 * calls the appropriate stub to handle it.
945 /* FIXME: returns 0 in case of failure */
946 #define INCR_OP_INITIATED(index) \
948 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
949 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
950 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
952 #define INCR_OP_COMPLETED(index) \
954 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
955 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
956 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
957 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
959 #else /* !SLAPD_MONITOR */
960 #define INCR_OP_INITIATED(index) do { } while (0)
961 #define INCR_OP_COMPLETED(index) \
963 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
964 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
965 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
967 #endif /* !SLAPD_MONITOR */
970 * NOTE: keep in sync with enum in slapd.h
972 static BI_op_func *opfun[] = {
986 /* Counters are per-thread, not per-connection.
989 conn_counter_destroy( void *key, void *data )
991 slap_counters_t **prev, *sc;
993 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
994 for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
995 prev = &sc->sc_next, sc = sc->sc_next ) {
1000 /* Copy data to main counter */
1001 ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1002 ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1003 ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1004 ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1005 ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1006 ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1007 #ifdef SLAPD_MONITOR
1008 for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1009 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1010 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1012 #endif /* SLAPD_MONITOR */
1013 slap_counters_destroy( sc );
1014 ber_memfree_x( data, NULL );
1018 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1022 conn_counter_init( Operation *op, void *ctx )
1024 slap_counters_t *sc;
1027 if ( ldap_pvt_thread_pool_getkey(
1028 ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1029 vsc = ch_malloc( sizeof( slap_counters_t ));
1031 slap_counters_init( sc );
1032 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1033 conn_counter_destroy, NULL, NULL );
1035 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1036 sc->sc_next = slap_counters.sc_next;
1037 slap_counters.sc_next = sc;
1038 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1040 op->o_counters = vsc;
1044 connection_operation( void *ctx, void *arg_v )
1046 int rc = LDAP_OTHER, cancel;
1047 Operation *op = arg_v;
1048 SlapReply rs = {REP_RESULT};
1049 ber_tag_t tag = op->o_tag;
1050 slap_op_t opidx = SLAP_OP_LAST;
1051 Connection *conn = op->o_conn;
1052 void *memctx = NULL;
1053 void *memctx_null = NULL;
1056 conn_counter_init( op, ctx );
1057 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1058 /* FIXME: returns 0 in case of failure */
1059 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1060 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1062 op->o_threadctx = ctx;
1063 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1067 case LDAP_REQ_UNBIND:
1069 case LDAP_REQ_DELETE:
1070 case LDAP_REQ_MODDN:
1071 case LDAP_REQ_MODIFY:
1072 case LDAP_REQ_COMPARE:
1073 case LDAP_REQ_SEARCH:
1074 case LDAP_REQ_ABANDON:
1075 case LDAP_REQ_EXTENDED:
1078 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1079 "conn %lu unknown LDAP request 0x%lx\n",
1080 conn->c_connid, tag, 0 );
1081 op->o_tag = LBER_ERROR;
1082 rs.sr_err = LDAP_PROTOCOL_ERROR;
1083 rs.sr_text = "unknown LDAP request";
1084 send_ldap_disconnect( op, &rs );
1085 rc = SLAPD_DISCONNECT;
1086 goto operations_error;
1089 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1090 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1091 "error: SASL bind in progress (tag=%ld).\n",
1093 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1094 "SASL bind in progress" );
1095 rc = LDAP_OPERATIONS_ERROR;
1096 goto operations_error;
1100 if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1101 ( tag == LDAP_REQ_ADD ) ||
1102 ( tag == LDAP_REQ_DELETE ) ||
1103 ( tag == LDAP_REQ_MODIFY ) ||
1104 ( tag == LDAP_REQ_MODRDN )))
1106 /* Disable SLAB allocator for all update operations
1107 issued inside of a transaction */
1108 op->o_tmpmemctx = NULL;
1109 op->o_tmpmfuncs = &ch_mfuncs;
1113 /* We can use Thread-Local storage for most mallocs. We can
1114 * also use TL for ber parsing, but not on Add or Modify.
1117 memsiz = ber_len( op->o_ber ) * 64;
1118 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1120 memsiz = SLAP_SLAB_SIZE;
1122 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1123 op->o_tmpmemctx = memctx;
1124 op->o_tmpmfuncs = &slap_sl_mfuncs;
1125 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1126 /* Note - the ber and its buffer are already allocated from
1127 * regular memory; this only affects subsequent mallocs that
1128 * ber_scanf may invoke.
1130 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1134 opidx = slap_req2op( tag );
1135 assert( opidx != SLAP_OP_LAST );
1136 INCR_OP_INITIATED( opidx );
1137 rc = (*(opfun[opidx]))( op, &rs );
1140 if ( rc == SLAPD_DISCONNECT ) {
1143 } else if ( opidx != SLAP_OP_LAST ) {
1144 /* increment completed operations count
1145 * only if operation was initiated
1146 * and rc != SLAPD_DISCONNECT */
1147 INCR_OP_COMPLETED( opidx );
1150 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1152 if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1153 conn->c_conn_state = SLAP_C_ACTIVE;
1155 cancel = op->o_cancel;
1156 if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1157 if ( cancel == SLAP_CANCEL_REQ ) {
1158 op->o_cancel = rc == SLAPD_ABANDON
1159 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1163 /* Fake a cond_wait with thread_yield, then
1164 * verify the result properly mutex-protected.
1166 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1168 ldap_pvt_thread_yield();
1169 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1170 && cancel != SLAP_CANCEL_DONE );
1171 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1172 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1173 && cancel != SLAP_CANCEL_DONE );
1176 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1178 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1179 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1180 conn->c_n_ops_executing--;
1181 conn->c_n_ops_completed++;
1185 case LDAP_REQ_UNBIND:
1186 /* c_mutex is locked */
1187 connection_closing( conn,
1188 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1192 connection_resched( conn );
1193 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1194 slap_op_free( op, ctx );
1198 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1200 Connection *connection_client_setup(
1202 ldap_pvt_thread_start_t *func,
1206 ber_socket_t sfd = SLAP_SOCKNEW( s );
1208 c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1209 CONN_IS_CLIENT, 0, NULL
1210 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1212 c->c_clientfunc = func;
1213 c->c_clientarg = arg;
1215 slapd_add_internal( sfd, 0 );
1220 void connection_client_enable(
1223 slapd_set_read( c->c_sd, 1 );
1226 void connection_client_stop(
1230 ber_socket_t s = c->c_sd;
1232 /* get (locked) connection */
1233 c = connection_get( s );
1235 assert( c->c_conn_state == SLAP_C_CLIENT );
1237 c->c_listener = NULL;
1238 c->c_conn_state = SLAP_C_INVALID;
1239 c->c_struct_state = SLAP_C_UNUSED;
1240 c->c_sd = AC_SOCKET_INVALID;
1241 c->c_close_reason = "?"; /* should never be needed */
1243 c->c_sb = ber_sockbuf_alloc( );
1245 ber_len_t max = sockbuf_max_incoming;
1246 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1248 slapd_remove( s, sb, 0, 1, 0 );
1250 connection_return( c );
1253 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1255 static void* connection_read_thread( void* ctx, void* argv )
1258 conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1259 ber_socket_t s = (long)argv;
1262 * read incoming LDAP requests. If there is more than one,
1263 * the first one is returned with new_op
1266 if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1267 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1268 return (void*)(long)rc;
1271 /* execute a single queued request in the same thread */
1272 if( cri.op && !cri.nullop ) {
1273 rc = (long)connection_operation( ctx, cri.op );
1274 } else if ( cri.func ) {
1275 rc = (long)cri.func( ctx, cri.arg );
1278 return (void*)(long)rc;
1281 int connection_read_activate( ber_socket_t s )
1286 * suspend reading on this file descriptor until a connection processing
1287 * thread reads data on it. Otherwise the listener thread will repeatedly
1288 * submit the same event on it to the pool.
1290 rc = slapd_clr_read( s, 0 );
1294 /* Don't let blocked writers block a pause request */
1295 if ( connections[s].c_writewaiter &&
1296 ldap_pvt_thread_pool_pausing( &connection_pool ))
1297 connection_wake_writers( &connections[s] );
1299 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1300 connection_read_thread, (void *)(long)s );
1303 Debug( LDAP_DEBUG_ANY,
1304 "connection_read_activate(%d): submit failed (%d)\n",
1312 connection_read( ber_socket_t s, conn_readinfo *cri )
1317 assert( connections != NULL );
1319 /* get (locked) connection */
1320 c = connection_get( s );
1323 Debug( LDAP_DEBUG_ANY,
1324 "connection_read(%ld): no connection!\n",
1332 if( c->c_conn_state == SLAP_C_CLOSING ) {
1333 Debug( LDAP_DEBUG_CONNS,
1334 "connection_read(%d): closing, ignoring input for id=%lu\n",
1335 s, c->c_connid, 0 );
1336 connection_return( c );
1340 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1341 cri->func = c->c_clientfunc;
1342 cri->arg = c->c_clientarg;
1343 /* read should already be cleared */
1344 connection_return( c );
1348 Debug( LDAP_DEBUG_TRACE,
1349 "connection_read(%d): checking for input on id=%lu\n",
1350 s, c->c_connid, 0 );
1353 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1354 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1356 Debug( LDAP_DEBUG_TRACE,
1357 "connection_read(%d): TLS accept failure "
1358 "error=%d id=%lu, closing\n",
1359 s, rc, c->c_connid );
1361 c->c_needs_tls_accept = 0;
1362 /* c_mutex is locked */
1363 connection_closing( c, "TLS negotiation failure" );
1364 connection_close( c );
1365 connection_return( c );
1368 } else if ( rc == 0 ) {
1370 struct berval authid = BER_BVNULL;
1372 c->c_needs_tls_accept = 0;
1374 /* we need to let SASL know */
1375 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1377 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1378 if( c->c_tls_ssf > c->c_ssf ) {
1379 c->c_ssf = c->c_tls_ssf;
1382 rc = dnX509peerNormalize( ssl, &authid );
1383 if ( rc != LDAP_SUCCESS ) {
1384 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1385 "unable to get TLS client DN, error=%d id=%lu\n",
1386 s, rc, c->c_connid );
1388 Statslog( LDAP_DEBUG_STATS,
1389 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1390 c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1391 slap_sasl_external( c, c->c_tls_ssf, &authid );
1392 if ( authid.bv_val ) free( authid.bv_val );
1393 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1394 LBER_SB_OPT_NEEDS_WRITE, NULL )) { /* need to retry */
1395 slapd_set_write( s, 1 );
1396 connection_return( c );
1400 /* if success and data is ready, fall thru to data input loop */
1401 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1403 slapd_set_read( s, 1 );
1404 connection_return( c );
1410 #ifdef HAVE_CYRUS_SASL
1411 if ( c->c_sasl_layers ) {
1412 /* If previous layer is not removed yet, give up for now */
1413 if ( !c->c_sasl_sockctx ) {
1414 slapd_set_read( s, 1 );
1415 connection_return( c );
1419 c->c_sasl_layers = 0;
1421 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1422 if( rc != LDAP_SUCCESS ) {
1423 Debug( LDAP_DEBUG_TRACE,
1424 "connection_read(%d): SASL install error "
1425 "error=%d id=%lu, closing\n",
1426 s, rc, c->c_connid );
1428 /* c_mutex is locked */
1429 connection_closing( c, "SASL layer install failure" );
1430 connection_close( c );
1431 connection_return( c );
1437 #define CONNECTION_INPUT_LOOP 1
1438 /* #define DATA_READY_LOOP 1 */
1441 /* How do we do this without getting into a busy loop ? */
1442 rc = connection_input( c, cri );
1444 #ifdef DATA_READY_LOOP
1445 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1446 #elif defined CONNECTION_INPUT_LOOP
1453 Debug( LDAP_DEBUG_CONNS,
1454 "connection_read(%d): input error=%d id=%lu, closing.\n",
1455 s, rc, c->c_connid );
1457 /* c_mutex is locked */
1458 connection_closing( c, conn_lost_str );
1459 connection_close( c );
1460 connection_return( c );
1464 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1465 slapd_set_write( s, 0 );
1468 slapd_set_read( s, 1 );
1469 connection_return( c );
1475 connection_input( Connection *conn , conn_readinfo *cri )
1483 #ifdef LDAP_CONNECTIONLESS
1490 if ( conn->c_currentber == NULL &&
1491 ( conn->c_currentber = ber_alloc()) == NULL )
1493 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1499 #ifdef LDAP_CONNECTIONLESS
1500 if ( conn->c_is_udp ) {
1501 char peername[sizeof("IP=255.255.255.255:65336")];
1502 const char *peeraddr_string = NULL;
1504 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1505 if (len != sizeof(struct sockaddr)) return 1;
1507 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1508 char addr[INET_ADDRSTRLEN];
1509 peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1510 addr, sizeof(addr) );
1511 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1512 peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1513 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1514 sprintf( peername, "IP=%s:%d",
1516 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1517 Statslog( LDAP_DEBUG_STATS,
1518 "conn=%lu UDP request from %s (%s) accepted.\n",
1519 conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1523 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1524 if ( tag != LDAP_TAG_MESSAGE ) {
1525 int err = sock_errno();
1527 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1528 /* log, close and send error */
1529 Debug( LDAP_DEBUG_TRACE,
1530 "ber_get_next on fd %d failed errno=%d (%s)\n",
1531 conn->c_sd, err, sock_errstr(err) );
1532 ber_free( conn->c_currentber, 1 );
1533 conn->c_currentber = NULL;
1540 ber = conn->c_currentber;
1541 conn->c_currentber = NULL;
1543 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1544 /* log, close and send error */
1545 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1550 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1551 /* log, close and send error */
1552 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1558 #ifdef LDAP_CONNECTIONLESS
1559 if( conn->c_is_udp ) {
1560 if( tag == LBER_OCTETSTRING ) {
1561 if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1562 tag = ber_peek_tag( ber, &len );
1564 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1565 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1572 if(tag == LDAP_REQ_BIND) {
1573 /* immediately abandon all existing operations upon BIND */
1574 connection_abandon( conn );
1578 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1580 Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1581 (long) op->o_time, 0);
1584 /* clear state if the connection is being reused from inactive */
1585 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1586 memset( &conn->c_pagedresults_state, 0,
1587 sizeof( conn->c_pagedresults_state ) );
1590 op->o_res_ber = NULL;
1592 #ifdef LDAP_CONNECTIONLESS
1593 if (conn->c_is_udp) {
1595 ber_str2bv( cdn, 0, 1, &op->o_dn );
1596 op->o_protocol = LDAP_VERSION2;
1598 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1599 if (op->o_res_ber == NULL) return 1;
1601 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1602 sizeof(struct sockaddr), 0 );
1604 if (rc != sizeof(struct sockaddr)) {
1605 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1609 if (op->o_protocol == LDAP_VERSION2) {
1610 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1612 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1617 #endif /* LDAP_CONNECTIONLESS */
1621 /* Don't process requests when the conn is in the middle of a
1622 * Bind, or if it's closing. Also, don't let any single conn
1623 * use up all the available threads, and don't execute if we're
1624 * currently blocked on output. And don't execute if there are
1625 * already pending ops, let them go first. Abandon operations
1626 * get exceptions to some, but not all, cases.
1630 /* Abandon and Unbind are exempt from these checks */
1631 if (conn->c_conn_state == SLAP_C_CLOSING) {
1634 } else if (conn->c_writewaiter) {
1635 defer = "awaiting write";
1637 } else if (conn->c_n_ops_pending) {
1638 defer = "pending operations";
1642 case LDAP_REQ_ABANDON:
1643 /* Unbind is exempt from these checks */
1644 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1645 defer = "too many executing";
1647 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1652 case LDAP_REQ_UNBIND:
1657 int max = conn->c_dn.bv_len
1658 ? slap_conn_max_pending_auth
1659 : slap_conn_max_pending;
1661 Debug( LDAP_DEBUG_ANY,
1662 "connection_input: conn=%lu deferring operation: %s\n",
1663 conn->c_connid, defer, 0 );
1664 conn->c_n_ops_pending++;
1665 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1666 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1669 conn->c_n_ops_executing++;
1672 * The first op will be processed in the same thread context,
1673 * as long as there is only one op total.
1674 * Subsequent ops will be submitted to the pool by
1675 * calling connection_op_activate()
1677 if ( cri->op == NULL ) {
1678 /* the first incoming request */
1679 connection_op_queue( op );
1682 if ( !cri->nullop ) {
1684 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1685 connection_operation, (void *) cri->op );
1687 connection_op_activate( op );
1692 if ( conn->c_struct_state != SLAP_C_USED ) {
1693 /* connection must have got closed underneath us */
1698 assert( conn->c_struct_state == SLAP_C_USED );
1703 connection_resched( Connection *conn )
1707 if( conn->c_writewaiter )
1710 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1711 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1712 "attempting closing conn=%lu sd=%d\n",
1713 conn->c_connid, conn->c_sd, 0 );
1714 connection_close( conn );
1718 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1719 /* other states need different handling */
1723 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1724 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1726 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1727 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1729 /* pending operations should not be marked for abandonment */
1730 assert(!op->o_abandon);
1732 conn->c_n_ops_pending--;
1733 conn->c_n_ops_executing++;
1735 connection_op_activate( op );
1737 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1743 connection_init_log_prefix( Operation *op )
1745 if ( op->o_connid == (unsigned long)(-1) ) {
1746 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1747 "conn=-1 op=%lu", op->o_opid );
1750 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1751 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1755 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1757 op->o_conn->c_sasl_bindop = NULL;
1759 ch_free( op->o_callback );
1760 op->o_callback = NULL;
1762 return SLAP_CB_CONTINUE;
1765 static int connection_bind_cb( Operation *op, SlapReply *rs )
1767 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1768 op->o_conn->c_sasl_bind_in_progress =
1769 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1771 /* Moved here from bind.c due to ITS#4158 */
1772 op->o_conn->c_sasl_bindop = NULL;
1773 if ( op->orb_method == LDAP_AUTH_SASL ) {
1774 if( rs->sr_err == LDAP_SUCCESS ) {
1775 ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1776 if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1777 /* edn is always normalized already */
1778 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1780 op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1781 BER_BVZERO( &op->orb_edn );
1782 op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1783 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1785 op->o_conn->c_sasl_ssf = op->orb_ssf;
1786 if( op->orb_ssf > op->o_conn->c_ssf ) {
1787 op->o_conn->c_ssf = op->orb_ssf;
1790 if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1791 ber_len_t max = sockbuf_max_incoming_auth;
1792 ber_sockbuf_ctrl( op->o_conn->c_sb,
1793 LBER_SB_OPT_SET_MAX_INCOMING, &max );
1796 /* log authorization identity */
1797 Statslog( LDAP_DEBUG_STATS,
1798 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1800 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1801 op->o_conn->c_authmech.bv_val,
1802 op->orb_ssf, op->o_conn->c_ssf );
1804 Debug( LDAP_DEBUG_TRACE,
1805 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1806 op->o_conn->c_authmech.bv_val,
1807 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1810 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1811 if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1812 free( op->o_conn->c_sasl_bind_mech.bv_val );
1813 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1817 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1819 ch_free( op->o_callback );
1820 op->o_callback = NULL;
1822 return SLAP_CB_CONTINUE;
1825 static void connection_op_queue( Operation *op )
1827 ber_tag_t tag = op->o_tag;
1829 if (tag == LDAP_REQ_BIND) {
1830 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1831 sc->sc_response = connection_bind_cb;
1832 sc->sc_cleanup = connection_bind_cleanup_cb;
1833 sc->sc_next = op->o_callback;
1834 op->o_callback = sc;
1835 op->o_conn->c_conn_state = SLAP_C_BINDING;
1838 if (!op->o_dn.bv_len) {
1839 op->o_authz = op->o_conn->c_authz;
1840 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1841 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1842 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1844 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1845 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1849 op->o_authtype = op->o_conn->c_authtype;
1850 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1852 if (!op->o_protocol) {
1853 op->o_protocol = op->o_conn->c_protocol
1854 ? op->o_conn->c_protocol : LDAP_VERSION3;
1857 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1858 op->o_protocol > LDAP_VERSION2)
1860 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1863 op->o_connid = op->o_conn->c_connid;
1864 connection_init_log_prefix( op );
1866 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1869 static int connection_op_activate( Operation *op )
1873 connection_op_queue( op );
1875 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1876 connection_operation, (void *) op );
1879 Debug( LDAP_DEBUG_ANY,
1880 "connection_op_activate: submit failed (%d) for conn=%lu\n",
1881 rc, op->o_connid, 0 );
1882 /* should move op to pending list */
1888 int connection_write(ber_socket_t s)
1893 assert( connections != NULL );
1895 slapd_clr_write( s, 0 );
1897 c = connection_get( s );
1899 Debug( LDAP_DEBUG_ANY,
1900 "connection_write(%ld): no connection!\n",
1906 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1907 connection_return( c );
1908 connection_read_activate( s );
1915 Debug( LDAP_DEBUG_TRACE,
1916 "connection_write(%d): waking output for id=%lu\n",
1917 s, c->c_connid, 0 );
1918 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1919 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1920 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1922 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1923 slapd_set_read( s, 1 );
1925 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1926 slapd_set_write( s, 1 );
1929 /* If there are ops pending because of a writewaiter,
1932 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1933 if ( !c->c_writewaiter ) break;
1934 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1936 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1937 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1939 /* pending operations should not be marked for abandonment */
1940 assert(!op->o_abandon);
1942 c->c_n_ops_pending--;
1943 c->c_n_ops_executing++;
1945 connection_op_activate( op );
1950 connection_return( c );
1955 typedef struct conn_fake_extblock {
1958 } conn_fake_extblock;
1961 connection_fake_destroy(
1965 Connection conn = {0};
1967 Opheader ohdr = {0};
1969 conn_fake_extblock *eb = data;
1972 op.o_hdr->oh_extensions = eb->eb_op;
1973 conn.c_extensions = eb->eb_conn;
1978 ber_memfree_x( eb, NULL );
1979 slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
1980 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
1985 connection_fake_init(
1987 OperationBuffer *opbuf,
1990 connection_fake_init2( conn, opbuf, ctx, 1 );
1994 operation_fake_init(
2000 /* set memory context */
2001 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2003 op->o_tmpmfuncs = &slap_sl_mfuncs;
2004 op->o_threadctx = ctx;
2005 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2007 op->o_counters = &slap_counters;
2009 op->o_connid = op->o_conn->c_connid;
2010 connection_init_log_prefix( op );
2015 connection_fake_init2(
2017 OperationBuffer *opbuf,
2021 Operation *op = (Operation *) opbuf;
2023 conn->c_connid = -1;
2024 conn->c_conn_idx = -1;
2025 conn->c_send_ldap_result = slap_send_ldap_result;
2026 conn->c_send_search_entry = slap_send_search_entry;
2027 conn->c_send_search_reference = slap_send_search_reference;
2028 conn->c_send_ldap_extended = slap_send_ldap_extended;
2029 conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2030 conn->c_listener = (Listener *)&dummy_list;
2031 conn->c_peer_domain = slap_empty_bv;
2032 conn->c_peer_name = slap_empty_bv;
2034 memset( opbuf, 0, sizeof( *opbuf ));
2035 op->o_hdr = &opbuf->ob_hdr;
2036 op->o_controls = opbuf->ob_controls;
2038 operation_fake_init( conn, op, ctx, newmem );
2041 if ( slapi_plugins_used ) {
2042 conn_fake_extblock *eb;
2045 /* Use thread keys to make sure these eventually get cleaned up */
2046 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2048 eb = ch_malloc( sizeof( *eb ));
2049 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2050 slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2051 eb->eb_conn = conn->c_extensions;
2052 eb->eb_op = op->o_hdr->oh_extensions;
2053 ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2054 eb, connection_fake_destroy, NULL, NULL );
2057 conn->c_extensions = eb->eb_conn;
2058 op->o_hdr->oh_extensions = eb->eb_op;
2061 #endif /* LDAP_SLAPI */
2063 slap_op_time( &op->o_time, &op->o_tincr );
2067 connection_assign_nextid( Connection *conn )
2069 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2070 conn->c_connid = conn_nextid++;
2071 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );