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;
409 c->c_sasl_cbind = NULL;
411 c->c_sb = ber_sockbuf_alloc( );
414 ber_len_t max = sockbuf_max_incoming;
415 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
418 c->c_currentber = NULL;
420 /* should check status of thread calls */
421 ldap_pvt_thread_mutex_init( &c->c_mutex );
422 ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
423 ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
424 ldap_pvt_thread_cond_init( &c->c_write1_cv );
425 ldap_pvt_thread_cond_init( &c->c_write2_cv );
428 if ( slapi_plugins_used ) {
429 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
434 ldap_pvt_thread_mutex_lock( &c->c_mutex );
436 assert( BER_BVISNULL( &c->c_authmech ) );
437 assert( BER_BVISNULL( &c->c_dn ) );
438 assert( BER_BVISNULL( &c->c_ndn ) );
439 assert( c->c_listener == NULL );
440 assert( BER_BVISNULL( &c->c_peer_domain ) );
441 assert( BER_BVISNULL( &c->c_peer_name ) );
442 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
443 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
445 assert( c->c_txn == CONN_TXN_INACTIVE );
446 assert( c->c_txn_backend == NULL );
447 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
449 assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
450 assert( c->c_sasl_done == 0 );
451 assert( c->c_sasl_authctx == NULL );
452 assert( c->c_sasl_sockctx == NULL );
453 assert( c->c_sasl_extra == NULL );
454 assert( c->c_sasl_bindop == NULL );
455 assert( c->c_sasl_cbind == NULL );
456 assert( c->c_currentber == NULL );
457 assert( c->c_writewaiter == 0);
458 assert( c->c_writers == 0);
460 c->c_listener = listener;
463 if ( flags & CONN_IS_CLIENT ) {
465 ldap_pvt_thread_mutex_lock( &connections_mutex );
466 c->c_conn_state = SLAP_C_CLIENT;
467 c->c_struct_state = SLAP_C_USED;
468 ldap_pvt_thread_mutex_unlock( &connections_mutex );
469 c->c_close_reason = "?"; /* should never be needed */
470 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
471 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
476 ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
477 ber_str2bv( peername, 0, 1, &c->c_peer_name );
479 c->c_n_ops_received = 0;
480 c->c_n_ops_executing = 0;
481 c->c_n_ops_pending = 0;
482 c->c_n_ops_completed = 0;
488 /* set to zero until bind, implies LDAP_VERSION3 */
491 #ifndef SLAPD_MONITOR
492 if ( global_idletimeout > 0 )
493 #endif /* ! SLAPD_MONITOR */
495 c->c_activitytime = c->c_starttime = slap_get_time();
498 #ifdef LDAP_CONNECTIONLESS
500 if( flags & CONN_IS_UDP ) {
503 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
504 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
506 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
507 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
508 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
509 LBER_SBIOD_LEVEL_PROVIDER, NULL );
511 #endif /* LDAP_CONNECTIONLESS */
513 if ( flags & CONN_IS_IPC ) {
515 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
516 LBER_SBIOD_LEVEL_PROVIDER, (void*)"ipc_" );
518 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_fd,
519 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
520 #ifdef LDAP_PF_LOCAL_SENDMSG
521 if ( !BER_BVISEMPTY( peerbv ))
522 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_UNGET_BUF, peerbv );
525 #endif /* LDAP_PF_LOCAL */
528 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
529 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
531 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
532 LBER_SBIOD_LEVEL_PROVIDER, (void *)&sfd );
536 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
537 INT_MAX, (void*)"ldap_" );
540 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
541 c /* non-NULL */ ) < 0 )
543 Debug( LDAP_DEBUG_ANY,
544 "connection_init(%d, %s): set nonblocking failed\n",
545 s, c->c_peer_name.bv_val, 0 );
548 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
549 id = c->c_connid = conn_nextid++;
550 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
552 ldap_pvt_thread_mutex_lock( &connections_mutex );
553 c->c_conn_state = SLAP_C_INACTIVE;
554 c->c_struct_state = SLAP_C_USED;
555 ldap_pvt_thread_mutex_unlock( &connections_mutex );
556 c->c_close_reason = "?"; /* should never be needed */
558 c->c_ssf = c->c_transport_ssf = ssf;
562 if ( flags & CONN_IS_TLS ) {
564 c->c_needs_tls_accept = 1;
567 c->c_needs_tls_accept = 0;
571 slap_sasl_open( c, 0 );
572 slap_sasl_external( c, ssf, authid );
574 slapd_add_internal( s, 1 );
576 backend_connection_init(c);
577 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
579 if ( !(flags & CONN_IS_UDP ))
580 Statslog( LDAP_DEBUG_STATS,
581 "conn=%ld fd=%ld ACCEPT from %s (%s)\n",
582 id, (long) s, peername, listener->sl_name.bv_val, 0 );
587 void connection2anonymous( Connection *c )
589 assert( connections != NULL );
593 ber_len_t max = sockbuf_max_incoming;
594 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
597 if ( !BER_BVISNULL( &c->c_authmech ) ) {
598 ch_free(c->c_authmech.bv_val);
600 BER_BVZERO( &c->c_authmech );
602 if ( !BER_BVISNULL( &c->c_dn ) ) {
603 ch_free(c->c_dn.bv_val);
605 BER_BVZERO( &c->c_dn );
607 if ( !BER_BVISNULL( &c->c_ndn ) ) {
608 ch_free(c->c_ndn.bv_val);
610 BER_BVZERO( &c->c_ndn );
612 if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
613 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
615 BER_BVZERO( &c->c_sasl_authz_dn );
617 c->c_authz_backend = NULL;
621 connection_destroy( Connection *c )
623 unsigned long connid;
624 const char *close_reason;
628 assert( connections != NULL );
630 assert( c->c_struct_state != SLAP_C_UNUSED );
631 assert( c->c_conn_state != SLAP_C_INVALID );
632 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
633 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
635 assert( c->c_txn == CONN_TXN_INACTIVE );
636 assert( c->c_txn_backend == NULL );
637 assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
639 assert( c->c_writewaiter == 0);
640 assert( c->c_writers == 0);
642 /* only for stats (print -1 as "%lu" may give unexpected results ;) */
643 connid = c->c_connid;
644 close_reason = c->c_close_reason;
646 ldap_pvt_thread_mutex_lock( &connections_mutex );
647 c->c_struct_state = SLAP_C_PENDING;
648 ldap_pvt_thread_mutex_unlock( &connections_mutex );
650 backend_connection_destroy(c);
655 c->c_activitytime = c->c_starttime = 0;
657 connection2anonymous( c );
658 c->c_listener = NULL;
660 if(c->c_peer_domain.bv_val != NULL) {
661 free(c->c_peer_domain.bv_val);
663 BER_BVZERO( &c->c_peer_domain );
664 if(c->c_peer_name.bv_val != NULL) {
665 free(c->c_peer_name.bv_val);
667 BER_BVZERO( &c->c_peer_name );
669 c->c_sasl_bind_in_progress = 0;
670 if(c->c_sasl_bind_mech.bv_val != NULL) {
671 free(c->c_sasl_bind_mech.bv_val);
673 BER_BVZERO( &c->c_sasl_bind_mech );
675 slap_sasl_close( c );
677 if ( c->c_currentber != NULL ) {
678 ber_free( c->c_currentber, 1 );
679 c->c_currentber = NULL;
684 /* call destructors, then constructors; avoids unnecessary allocation */
685 if ( slapi_plugins_used ) {
686 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
691 c->c_sd = AC_SOCKET_INVALID;
692 c->c_conn_state = SLAP_C_INVALID;
693 c->c_struct_state = SLAP_C_UNUSED;
694 c->c_close_reason = "?"; /* should never be needed */
697 c->c_sb = ber_sockbuf_alloc( );
699 ber_len_t max = sockbuf_max_incoming;
700 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
703 /* c must be fully reset by this point; when we call slapd_remove
704 * it may get immediately reused by a new connection.
706 if ( sd != AC_SOCKET_INVALID ) {
707 slapd_remove( sd, sb, 1, 0, 0 );
709 if ( close_reason == NULL ) {
710 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed\n",
711 connid, (long) sd, 0, 0, 0 );
713 Statslog( LDAP_DEBUG_STATS, "conn=%lu fd=%ld closed (%s)\n",
714 connid, (long) sd, close_reason, 0, 0 );
719 int connection_valid( Connection *c )
721 /* c_mutex must be locked by caller */
725 return c->c_struct_state == SLAP_C_USED &&
726 c->c_conn_state >= SLAP_C_ACTIVE &&
727 c->c_conn_state <= SLAP_C_CLIENT;
730 static void connection_abandon( Connection *c )
732 /* c_mutex must be locked by caller */
734 Operation *o, *next, op = {0};
739 op.o_connid = c->c_connid;
740 op.o_tag = LDAP_REQ_ABANDON;
742 for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
743 SlapReply rs = {REP_RESULT};
745 next = LDAP_STAILQ_NEXT( o, o_next );
746 op.orn_msgid = o->o_msgid;
748 op.o_bd = frontendDB;
749 frontendDB->be_abandon( &op, &rs );
753 /* remove operations in pending transaction */
754 while ( (o = LDAP_STAILQ_FIRST( &c->c_txn_ops )) != NULL) {
755 LDAP_STAILQ_REMOVE_HEAD( &c->c_txn_ops, o_next );
756 LDAP_STAILQ_NEXT(o, o_next) = NULL;
757 slap_op_free( o, NULL );
760 /* clear transaction */
761 c->c_txn_backend = NULL;
762 c->c_txn = CONN_TXN_INACTIVE;
765 /* remove pending operations */
766 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
767 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
768 LDAP_STAILQ_NEXT(o, o_next) = NULL;
769 slap_op_free( o, NULL );
774 connection_wake_writers( Connection *c )
776 /* wake write blocked operations */
777 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
778 if ( c->c_writers > 0 ) {
779 c->c_writers = -c->c_writers;
780 ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
781 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
782 if ( c->c_writewaiter ) {
783 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
784 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
785 slapd_clr_write( c->c_sd, 1 );
786 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
788 ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
789 while ( c->c_writers ) {
790 ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
792 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
794 ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
795 slapd_clr_write( c->c_sd, 1 );
799 void connection_closing( Connection *c, const char *why )
801 assert( connections != NULL );
804 if ( c->c_struct_state != SLAP_C_USED ) return;
806 assert( c->c_conn_state != SLAP_C_INVALID );
808 /* c_mutex must be locked by caller */
810 if( c->c_conn_state != SLAP_C_CLOSING ) {
811 Debug( LDAP_DEBUG_CONNS,
812 "connection_closing: readying conn=%lu sd=%d for close\n",
813 c->c_connid, c->c_sd, 0 );
814 /* update state to closing */
815 c->c_conn_state = SLAP_C_CLOSING;
816 c->c_close_reason = why;
818 /* don't listen on this port anymore */
819 slapd_clr_read( c->c_sd, 0 );
821 /* abandon active operations */
822 connection_abandon( c );
824 /* wake write blocked operations */
825 connection_wake_writers( c );
827 } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
828 /* Client closed connection after doing Unbind. */
829 c->c_close_reason = NULL;
834 connection_close( Connection *c )
836 assert( connections != NULL );
839 if ( c->c_struct_state != SLAP_C_USED ) return;
841 assert( c->c_conn_state == SLAP_C_CLOSING );
843 /* NOTE: c_mutex should be locked by caller */
845 if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
846 !LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
848 Debug( LDAP_DEBUG_CONNS,
849 "connection_close: deferring conn=%lu sd=%d\n",
850 c->c_connid, c->c_sd, 0 );
854 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
855 c->c_connid, c->c_sd, 0 );
857 connection_destroy( c );
860 unsigned long connections_nextid(void)
863 assert( connections != NULL );
865 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
869 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
875 * Loop through the connections:
877 * for (c = connection_first(&i); c; c = connection_next(c, &i)) ...;
878 * connection_done(c);
880 * 'i' is the cursor, initialized by connection_first().
881 * 'c_mutex' is locked in the returned connection. The functions must
882 * be passed the previous return value so they can unlock it again.
885 Connection* connection_first( ber_socket_t *index )
887 assert( connections != NULL );
888 assert( index != NULL );
890 ldap_pvt_thread_mutex_lock( &connections_mutex );
891 for( *index = 0; *index < dtblsize; (*index)++) {
892 if( connections[*index].c_struct_state != SLAP_C_UNINITIALIZED ) {
896 ldap_pvt_thread_mutex_unlock( &connections_mutex );
898 return connection_next(NULL, index);
901 /* Next connection in loop, see connection_first() */
902 Connection* connection_next( Connection *c, ber_socket_t *index )
904 assert( connections != NULL );
905 assert( index != NULL );
906 assert( *index <= dtblsize );
908 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
912 ldap_pvt_thread_mutex_lock( &connections_mutex );
913 for(; *index < dtblsize; (*index)++) {
915 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
916 /* FIXME: accessing c_conn_state without locking c_mutex */
917 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
921 if( connections[*index].c_struct_state == SLAP_C_USED ) {
922 c = &connections[(*index)++];
923 if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
925 ldap_pvt_thread_mutex_unlock( &connections_mutex );
926 ldap_pvt_thread_mutex_lock( &c->c_mutex );
927 ldap_pvt_thread_mutex_lock( &connections_mutex );
928 if ( c->c_struct_state != SLAP_C_USED ) {
929 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
934 assert( c->c_conn_state != SLAP_C_INVALID );
938 c_struct = connections[*index].c_struct_state;
939 if ( c_struct == SLAP_C_PENDING )
941 assert( c_struct == SLAP_C_UNUSED );
942 /* FIXME: accessing c_conn_state without locking c_mutex */
943 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
946 ldap_pvt_thread_mutex_unlock( &connections_mutex );
950 /* End connection loop, see connection_first() */
951 void connection_done( Connection *c )
953 assert( connections != NULL );
955 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
959 * connection_activity - handle the request operation op on connection
960 * conn. This routine figures out what kind of operation it is and
961 * calls the appropriate stub to handle it.
965 /* FIXME: returns 0 in case of failure */
966 #define INCR_OP_INITIATED(index) \
968 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
969 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated_[(index)], 1); \
970 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
972 #define INCR_OP_COMPLETED(index) \
974 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
975 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
976 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed_[(index)], 1); \
977 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
979 #else /* !SLAPD_MONITOR */
980 #define INCR_OP_INITIATED(index) do { } while (0)
981 #define INCR_OP_COMPLETED(index) \
983 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex ); \
984 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_completed, 1); \
985 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex ); \
987 #endif /* !SLAPD_MONITOR */
990 * NOTE: keep in sync with enum in slapd.h
992 static BI_op_func *opfun[] = {
1006 /* Counters are per-thread, not per-connection.
1009 conn_counter_destroy( void *key, void *data )
1011 slap_counters_t **prev, *sc;
1013 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1014 for ( prev = &slap_counters.sc_next, sc = slap_counters.sc_next; sc;
1015 prev = &sc->sc_next, sc = sc->sc_next ) {
1019 *prev = sc->sc_next;
1020 /* Copy data to main counter */
1021 ldap_pvt_mp_add( slap_counters.sc_bytes, sc->sc_bytes );
1022 ldap_pvt_mp_add( slap_counters.sc_pdu, sc->sc_pdu );
1023 ldap_pvt_mp_add( slap_counters.sc_entries, sc->sc_entries );
1024 ldap_pvt_mp_add( slap_counters.sc_refs, sc->sc_refs );
1025 ldap_pvt_mp_add( slap_counters.sc_ops_initiated, sc->sc_ops_initiated );
1026 ldap_pvt_mp_add( slap_counters.sc_ops_completed, sc->sc_ops_completed );
1027 #ifdef SLAPD_MONITOR
1028 for ( i = 0; i < SLAP_OP_LAST; i++ ) {
1029 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_initiated_[ i ] );
1030 ldap_pvt_mp_add( slap_counters.sc_ops_initiated_[ i ], sc->sc_ops_completed_[ i ] );
1032 #endif /* SLAPD_MONITOR */
1033 slap_counters_destroy( sc );
1034 ber_memfree_x( data, NULL );
1038 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1042 conn_counter_init( Operation *op, void *ctx )
1044 slap_counters_t *sc;
1047 if ( ldap_pvt_thread_pool_getkey(
1048 ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
1049 vsc = ch_malloc( sizeof( slap_counters_t ));
1051 slap_counters_init( sc );
1052 ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
1053 conn_counter_destroy, NULL, NULL );
1055 ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
1056 sc->sc_next = slap_counters.sc_next;
1057 slap_counters.sc_next = sc;
1058 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_mutex );
1060 op->o_counters = vsc;
1064 connection_operation( void *ctx, void *arg_v )
1066 int rc = LDAP_OTHER, cancel;
1067 Operation *op = arg_v;
1068 SlapReply rs = {REP_RESULT};
1069 ber_tag_t tag = op->o_tag;
1070 slap_op_t opidx = SLAP_OP_LAST;
1071 Connection *conn = op->o_conn;
1072 void *memctx = NULL;
1073 void *memctx_null = NULL;
1076 conn_counter_init( op, ctx );
1077 ldap_pvt_thread_mutex_lock( &op->o_counters->sc_mutex );
1078 /* FIXME: returns 0 in case of failure */
1079 ldap_pvt_mp_add_ulong(op->o_counters->sc_ops_initiated, 1);
1080 ldap_pvt_thread_mutex_unlock( &op->o_counters->sc_mutex );
1082 op->o_threadctx = ctx;
1083 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
1087 case LDAP_REQ_UNBIND:
1089 case LDAP_REQ_DELETE:
1090 case LDAP_REQ_MODDN:
1091 case LDAP_REQ_MODIFY:
1092 case LDAP_REQ_COMPARE:
1093 case LDAP_REQ_SEARCH:
1094 case LDAP_REQ_ABANDON:
1095 case LDAP_REQ_EXTENDED:
1098 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1099 "conn %lu unknown LDAP request 0x%lx\n",
1100 conn->c_connid, tag, 0 );
1101 op->o_tag = LBER_ERROR;
1102 rs.sr_err = LDAP_PROTOCOL_ERROR;
1103 rs.sr_text = "unknown LDAP request";
1104 send_ldap_disconnect( op, &rs );
1105 rc = SLAPD_DISCONNECT;
1106 goto operations_error;
1109 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1110 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1111 "error: SASL bind in progress (tag=%ld).\n",
1113 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1114 "SASL bind in progress" );
1115 rc = LDAP_OPERATIONS_ERROR;
1116 goto operations_error;
1120 if (( conn->c_txn == CONN_TXN_SPECIFY ) && (
1121 ( tag == LDAP_REQ_ADD ) ||
1122 ( tag == LDAP_REQ_DELETE ) ||
1123 ( tag == LDAP_REQ_MODIFY ) ||
1124 ( tag == LDAP_REQ_MODRDN )))
1126 /* Disable SLAB allocator for all update operations
1127 issued inside of a transaction */
1128 op->o_tmpmemctx = NULL;
1129 op->o_tmpmfuncs = &ch_mfuncs;
1133 /* We can use Thread-Local storage for most mallocs. We can
1134 * also use TL for ber parsing, but not on Add or Modify.
1137 memsiz = ber_len( op->o_ber ) * 64;
1138 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1140 memsiz = SLAP_SLAB_SIZE;
1142 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx, 1 );
1143 op->o_tmpmemctx = memctx;
1144 op->o_tmpmfuncs = &slap_sl_mfuncs;
1145 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1146 /* Note - the ber and its buffer are already allocated from
1147 * regular memory; this only affects subsequent mallocs that
1148 * ber_scanf may invoke.
1150 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1154 opidx = slap_req2op( tag );
1155 assert( opidx != SLAP_OP_LAST );
1156 INCR_OP_INITIATED( opidx );
1157 rc = (*(opfun[opidx]))( op, &rs );
1160 if ( rc == SLAPD_DISCONNECT ) {
1163 } else if ( opidx != SLAP_OP_LAST ) {
1164 /* increment completed operations count
1165 * only if operation was initiated
1166 * and rc != SLAPD_DISCONNECT */
1167 INCR_OP_COMPLETED( opidx );
1170 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1172 if ( opidx == SLAP_OP_BIND && conn->c_conn_state == SLAP_C_BINDING )
1173 conn->c_conn_state = SLAP_C_ACTIVE;
1175 cancel = op->o_cancel;
1176 if ( cancel != SLAP_CANCEL_NONE && cancel != SLAP_CANCEL_DONE ) {
1177 if ( cancel == SLAP_CANCEL_REQ ) {
1178 op->o_cancel = rc == SLAPD_ABANDON
1179 ? SLAP_CANCEL_ACK : LDAP_TOO_LATE;
1183 /* Fake a cond_wait with thread_yield, then
1184 * verify the result properly mutex-protected.
1186 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1188 ldap_pvt_thread_yield();
1189 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1190 && cancel != SLAP_CANCEL_DONE );
1191 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1192 } while ( (cancel = op->o_cancel) != SLAP_CANCEL_NONE
1193 && cancel != SLAP_CANCEL_DONE );
1196 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1198 LDAP_STAILQ_REMOVE( &conn->c_ops, op, Operation, o_next);
1199 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1200 conn->c_n_ops_executing--;
1201 conn->c_n_ops_completed++;
1205 case LDAP_REQ_UNBIND:
1206 /* c_mutex is locked */
1207 connection_closing( conn,
1208 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1212 connection_resched( conn );
1213 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1214 slap_op_free( op, ctx );
1218 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1220 Connection *connection_client_setup(
1222 ldap_pvt_thread_start_t *func,
1226 ber_socket_t sfd = SLAP_SOCKNEW( s );
1228 c = connection_init( sfd, (Listener *)&dummy_list, "", "",
1229 CONN_IS_CLIENT, 0, NULL
1230 LDAP_PF_LOCAL_SENDMSG_ARG(NULL));
1232 c->c_clientfunc = func;
1233 c->c_clientarg = arg;
1235 slapd_add_internal( sfd, 0 );
1240 void connection_client_enable(
1243 slapd_set_read( c->c_sd, 1 );
1246 void connection_client_stop(
1250 ber_socket_t s = c->c_sd;
1252 /* get (locked) connection */
1253 c = connection_get( s );
1255 assert( c->c_conn_state == SLAP_C_CLIENT );
1257 c->c_listener = NULL;
1258 c->c_conn_state = SLAP_C_INVALID;
1259 c->c_struct_state = SLAP_C_UNUSED;
1260 c->c_sd = AC_SOCKET_INVALID;
1261 c->c_close_reason = "?"; /* should never be needed */
1263 c->c_sb = ber_sockbuf_alloc( );
1265 ber_len_t max = sockbuf_max_incoming;
1266 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1268 slapd_remove( s, sb, 0, 1, 0 );
1270 connection_return( c );
1273 static int connection_read( ber_socket_t s, conn_readinfo *cri );
1275 static void* connection_read_thread( void* ctx, void* argv )
1278 conn_readinfo cri = { NULL, NULL, NULL, NULL, 0 };
1279 ber_socket_t s = (long)argv;
1282 * read incoming LDAP requests. If there is more than one,
1283 * the first one is returned with new_op
1286 if( ( rc = connection_read( s, &cri ) ) < 0 ) {
1287 Debug( LDAP_DEBUG_CONNS, "connection_read(%d) error\n", s, 0, 0 );
1288 return (void*)(long)rc;
1291 /* execute a single queued request in the same thread */
1292 if( cri.op && !cri.nullop ) {
1293 rc = (long)connection_operation( ctx, cri.op );
1294 } else if ( cri.func ) {
1295 rc = (long)cri.func( ctx, cri.arg );
1298 return (void*)(long)rc;
1301 int connection_read_activate( ber_socket_t s )
1306 * suspend reading on this file descriptor until a connection processing
1307 * thread reads data on it. Otherwise the listener thread will repeatedly
1308 * submit the same event on it to the pool.
1310 rc = slapd_clr_read( s, 0 );
1314 /* Don't let blocked writers block a pause request */
1315 if ( connections[s].c_writewaiter &&
1316 ldap_pvt_thread_pool_pausing( &connection_pool ))
1317 connection_wake_writers( &connections[s] );
1319 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1320 connection_read_thread, (void *)(long)s );
1323 Debug( LDAP_DEBUG_ANY,
1324 "connection_read_activate(%d): submit failed (%d)\n",
1332 connection_read( ber_socket_t s, conn_readinfo *cri )
1337 assert( connections != NULL );
1339 /* get (locked) connection */
1340 c = connection_get( s );
1343 Debug( LDAP_DEBUG_ANY,
1344 "connection_read(%ld): no connection!\n",
1352 if( c->c_conn_state == SLAP_C_CLOSING ) {
1353 Debug( LDAP_DEBUG_CONNS,
1354 "connection_read(%d): closing, ignoring input for id=%lu\n",
1355 s, c->c_connid, 0 );
1356 connection_return( c );
1360 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1361 cri->func = c->c_clientfunc;
1362 cri->arg = c->c_clientarg;
1363 /* read should already be cleared */
1364 connection_return( c );
1368 Debug( LDAP_DEBUG_TRACE,
1369 "connection_read(%d): checking for input on id=%lu\n",
1370 s, c->c_connid, 0 );
1373 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1374 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1376 Debug( LDAP_DEBUG_TRACE,
1377 "connection_read(%d): TLS accept failure "
1378 "error=%d id=%lu, closing\n",
1379 s, rc, c->c_connid );
1381 c->c_needs_tls_accept = 0;
1382 /* c_mutex is locked */
1383 connection_closing( c, "TLS negotiation failure" );
1384 connection_close( c );
1385 connection_return( c );
1388 } else if ( rc == 0 ) {
1390 struct berval authid = BER_BVNULL;
1392 c->c_needs_tls_accept = 0;
1394 /* we need to let SASL know */
1395 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1397 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1398 if( c->c_tls_ssf > c->c_ssf ) {
1399 c->c_ssf = c->c_tls_ssf;
1402 rc = dnX509peerNormalize( ssl, &authid );
1403 if ( rc != LDAP_SUCCESS ) {
1404 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1405 "unable to get TLS client DN, error=%d id=%lu\n",
1406 s, rc, c->c_connid );
1408 Statslog( LDAP_DEBUG_STATS,
1409 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1410 c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1411 slap_sasl_external( c, c->c_tls_ssf, &authid );
1412 if ( authid.bv_val ) free( authid.bv_val );
1415 struct berval cbv = { sizeof(cbinding), cbinding };
1416 if ( ldap_pvt_tls_get_unique( ssl, &cbv, 1 ))
1417 slap_sasl_cbinding( c, &cbv );
1419 } else if ( rc == 1 && ber_sockbuf_ctrl( c->c_sb,
1420 LBER_SB_OPT_NEEDS_WRITE, NULL )) { /* need to retry */
1421 slapd_set_write( s, 1 );
1422 connection_return( c );
1426 /* if success and data is ready, fall thru to data input loop */
1427 if( !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1429 slapd_set_read( s, 1 );
1430 connection_return( c );
1436 #ifdef HAVE_CYRUS_SASL
1437 if ( c->c_sasl_layers ) {
1438 /* If previous layer is not removed yet, give up for now */
1439 if ( !c->c_sasl_sockctx ) {
1440 slapd_set_read( s, 1 );
1441 connection_return( c );
1445 c->c_sasl_layers = 0;
1447 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1448 if( rc != LDAP_SUCCESS ) {
1449 Debug( LDAP_DEBUG_TRACE,
1450 "connection_read(%d): SASL install error "
1451 "error=%d id=%lu, closing\n",
1452 s, rc, c->c_connid );
1454 /* c_mutex is locked */
1455 connection_closing( c, "SASL layer install failure" );
1456 connection_close( c );
1457 connection_return( c );
1463 #define CONNECTION_INPUT_LOOP 1
1464 /* #define DATA_READY_LOOP 1 */
1467 /* How do we do this without getting into a busy loop ? */
1468 rc = connection_input( c, cri );
1470 #ifdef DATA_READY_LOOP
1471 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1472 #elif defined CONNECTION_INPUT_LOOP
1479 Debug( LDAP_DEBUG_CONNS,
1480 "connection_read(%d): input error=%d id=%lu, closing.\n",
1481 s, rc, c->c_connid );
1483 /* c_mutex is locked */
1484 connection_closing( c, conn_lost_str );
1485 connection_close( c );
1486 connection_return( c );
1490 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1491 slapd_set_write( s, 0 );
1494 slapd_set_read( s, 1 );
1495 connection_return( c );
1501 connection_input( Connection *conn , conn_readinfo *cri )
1509 #ifdef LDAP_CONNECTIONLESS
1516 if ( conn->c_currentber == NULL &&
1517 ( conn->c_currentber = ber_alloc()) == NULL )
1519 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1525 #ifdef LDAP_CONNECTIONLESS
1526 if ( conn->c_is_udp ) {
1527 char peername[sizeof("IP=255.255.255.255:65336")];
1528 const char *peeraddr_string = NULL;
1530 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1531 if (len != sizeof(struct sockaddr)) return 1;
1533 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
1534 char addr[INET_ADDRSTRLEN];
1535 peeraddr_string = inet_ntop( AF_INET, &peeraddr.sa_in_addr.sin_addr,
1536 addr, sizeof(addr) );
1537 #else /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1538 peeraddr_string = inet_ntoa( peeraddr.sa_in_addr.sin_addr );
1539 #endif /* ! HAVE_GETADDRINFO || ! HAVE_INET_NTOP */
1540 sprintf( peername, "IP=%s:%d",
1542 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1543 Statslog( LDAP_DEBUG_STATS,
1544 "conn=%lu UDP request from %s (%s) accepted.\n",
1545 conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1549 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1550 if ( tag != LDAP_TAG_MESSAGE ) {
1551 int err = sock_errno();
1553 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1554 /* log, close and send error */
1555 Debug( LDAP_DEBUG_TRACE,
1556 "ber_get_next on fd %d failed errno=%d (%s)\n",
1557 conn->c_sd, err, sock_errstr(err) );
1558 ber_free( conn->c_currentber, 1 );
1559 conn->c_currentber = NULL;
1566 ber = conn->c_currentber;
1567 conn->c_currentber = NULL;
1569 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1570 /* log, close and send error */
1571 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1576 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1577 /* log, close and send error */
1578 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1584 #ifdef LDAP_CONNECTIONLESS
1585 if( conn->c_is_udp ) {
1586 if( tag == LBER_OCTETSTRING ) {
1587 if ( (tag = ber_get_stringa( ber, &cdn )) != LBER_ERROR )
1588 tag = ber_peek_tag( ber, &len );
1590 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1591 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1598 if(tag == LDAP_REQ_BIND) {
1599 /* immediately abandon all existing operations upon BIND */
1600 connection_abandon( conn );
1604 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++, ctx );
1606 Debug( LDAP_DEBUG_TRACE, "op tag 0x%lx, time %ld\n", tag,
1607 (long) op->o_time, 0);
1610 /* clear state if the connection is being reused from inactive */
1611 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1612 memset( &conn->c_pagedresults_state, 0,
1613 sizeof( conn->c_pagedresults_state ) );
1616 op->o_res_ber = NULL;
1618 #ifdef LDAP_CONNECTIONLESS
1619 if (conn->c_is_udp) {
1621 ber_str2bv( cdn, 0, 1, &op->o_dn );
1622 op->o_protocol = LDAP_VERSION2;
1624 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1625 if (op->o_res_ber == NULL) return 1;
1627 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1628 sizeof(struct sockaddr), 0 );
1630 if (rc != sizeof(struct sockaddr)) {
1631 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1635 if (op->o_protocol == LDAP_VERSION2) {
1636 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1638 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1643 #endif /* LDAP_CONNECTIONLESS */
1647 /* Don't process requests when the conn is in the middle of a
1648 * Bind, or if it's closing. Also, don't let any single conn
1649 * use up all the available threads, and don't execute if we're
1650 * currently blocked on output. And don't execute if there are
1651 * already pending ops, let them go first. Abandon operations
1652 * get exceptions to some, but not all, cases.
1656 /* Abandon and Unbind are exempt from these checks */
1657 if (conn->c_conn_state == SLAP_C_CLOSING) {
1660 } else if (conn->c_writewaiter) {
1661 defer = "awaiting write";
1663 } else if (conn->c_n_ops_pending) {
1664 defer = "pending operations";
1668 case LDAP_REQ_ABANDON:
1669 /* Unbind is exempt from these checks */
1670 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1671 defer = "too many executing";
1673 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1678 case LDAP_REQ_UNBIND:
1683 int max = conn->c_dn.bv_len
1684 ? slap_conn_max_pending_auth
1685 : slap_conn_max_pending;
1687 Debug( LDAP_DEBUG_ANY,
1688 "connection_input: conn=%lu deferring operation: %s\n",
1689 conn->c_connid, defer, 0 );
1690 conn->c_n_ops_pending++;
1691 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1692 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1695 conn->c_n_ops_executing++;
1698 * The first op will be processed in the same thread context,
1699 * as long as there is only one op total.
1700 * Subsequent ops will be submitted to the pool by
1701 * calling connection_op_activate()
1703 if ( cri->op == NULL ) {
1704 /* the first incoming request */
1705 connection_op_queue( op );
1708 if ( !cri->nullop ) {
1710 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1711 connection_operation, (void *) cri->op );
1713 connection_op_activate( op );
1718 if ( conn->c_struct_state != SLAP_C_USED ) {
1719 /* connection must have got closed underneath us */
1724 assert( conn->c_struct_state == SLAP_C_USED );
1729 connection_resched( Connection *conn )
1733 if( conn->c_writewaiter )
1736 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1737 Debug( LDAP_DEBUG_CONNS, "connection_resched: "
1738 "attempting closing conn=%lu sd=%d\n",
1739 conn->c_connid, conn->c_sd, 0 );
1740 connection_close( conn );
1744 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1745 /* other states need different handling */
1749 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1750 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1752 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1753 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1755 /* pending operations should not be marked for abandonment */
1756 assert(!op->o_abandon);
1758 conn->c_n_ops_pending--;
1759 conn->c_n_ops_executing++;
1761 connection_op_activate( op );
1763 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1769 connection_init_log_prefix( Operation *op )
1771 if ( op->o_connid == (unsigned long)(-1) ) {
1772 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1773 "conn=-1 op=%lu", op->o_opid );
1776 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1777 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1781 static int connection_bind_cleanup_cb( Operation *op, SlapReply *rs )
1783 op->o_conn->c_sasl_bindop = NULL;
1785 ch_free( op->o_callback );
1786 op->o_callback = NULL;
1788 return SLAP_CB_CONTINUE;
1791 static int connection_bind_cb( Operation *op, SlapReply *rs )
1793 ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1794 op->o_conn->c_sasl_bind_in_progress =
1795 ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
1797 /* Moved here from bind.c due to ITS#4158 */
1798 op->o_conn->c_sasl_bindop = NULL;
1799 if ( op->orb_method == LDAP_AUTH_SASL ) {
1800 if( rs->sr_err == LDAP_SUCCESS ) {
1801 ber_dupbv(&op->o_conn->c_dn, &op->orb_edn);
1802 if( !BER_BVISEMPTY( &op->orb_edn ) ) {
1803 /* edn is always normalized already */
1804 ber_dupbv( &op->o_conn->c_ndn, &op->o_conn->c_dn );
1806 op->o_tmpfree( op->orb_edn.bv_val, op->o_tmpmemctx );
1807 BER_BVZERO( &op->orb_edn );
1808 op->o_conn->c_authmech = op->o_conn->c_sasl_bind_mech;
1809 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1811 op->o_conn->c_sasl_ssf = op->orb_ssf;
1812 if( op->orb_ssf > op->o_conn->c_ssf ) {
1813 op->o_conn->c_ssf = op->orb_ssf;
1816 if( !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
1817 ber_len_t max = sockbuf_max_incoming_auth;
1818 ber_sockbuf_ctrl( op->o_conn->c_sb,
1819 LBER_SB_OPT_SET_MAX_INCOMING, &max );
1822 /* log authorization identity */
1823 Statslog( LDAP_DEBUG_STATS,
1824 "%s BIND dn=\"%s\" mech=%s sasl_ssf=%d ssf=%d\n",
1826 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1827 op->o_conn->c_authmech.bv_val,
1828 op->orb_ssf, op->o_conn->c_ssf );
1830 Debug( LDAP_DEBUG_TRACE,
1831 "do_bind: SASL/%s bind: dn=\"%s\" sasl_ssf=%d\n",
1832 op->o_conn->c_authmech.bv_val,
1833 BER_BVISNULL( &op->o_conn->c_dn ) ? "<empty>" : op->o_conn->c_dn.bv_val,
1836 } else if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS ) {
1837 if ( !BER_BVISNULL( &op->o_conn->c_sasl_bind_mech ) ) {
1838 free( op->o_conn->c_sasl_bind_mech.bv_val );
1839 BER_BVZERO( &op->o_conn->c_sasl_bind_mech );
1843 ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1845 ch_free( op->o_callback );
1846 op->o_callback = NULL;
1848 return SLAP_CB_CONTINUE;
1851 static void connection_op_queue( Operation *op )
1853 ber_tag_t tag = op->o_tag;
1855 if (tag == LDAP_REQ_BIND) {
1856 slap_callback *sc = ch_calloc( 1, sizeof( slap_callback ));
1857 sc->sc_response = connection_bind_cb;
1858 sc->sc_cleanup = connection_bind_cleanup_cb;
1859 sc->sc_next = op->o_callback;
1860 op->o_callback = sc;
1861 op->o_conn->c_conn_state = SLAP_C_BINDING;
1864 if (!op->o_dn.bv_len) {
1865 op->o_authz = op->o_conn->c_authz;
1866 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1867 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1868 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1870 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1871 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1875 op->o_authtype = op->o_conn->c_authtype;
1876 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
1878 if (!op->o_protocol) {
1879 op->o_protocol = op->o_conn->c_protocol
1880 ? op->o_conn->c_protocol : LDAP_VERSION3;
1883 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
1884 op->o_protocol > LDAP_VERSION2)
1886 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
1889 op->o_connid = op->o_conn->c_connid;
1890 connection_init_log_prefix( op );
1892 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
1895 static int connection_op_activate( Operation *op )
1899 connection_op_queue( op );
1901 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1902 connection_operation, (void *) op );
1905 Debug( LDAP_DEBUG_ANY,
1906 "connection_op_activate: submit failed (%d) for conn=%lu\n",
1907 rc, op->o_connid, 0 );
1908 /* should move op to pending list */
1914 int connection_write(ber_socket_t s)
1919 assert( connections != NULL );
1921 c = connection_get( s );
1923 Debug( LDAP_DEBUG_ANY,
1924 "connection_write(%ld): no connection!\n",
1929 slapd_clr_write( s, 0 );
1932 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1933 connection_return( c );
1934 connection_read_activate( s );
1941 Debug( LDAP_DEBUG_TRACE,
1942 "connection_write(%d): waking output for id=%lu\n",
1943 s, c->c_connid, 0 );
1944 ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
1945 ldap_pvt_thread_cond_signal( &c->c_write2_cv );
1946 ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
1948 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1949 slapd_set_read( s, 1 );
1951 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1952 slapd_set_write( s, 1 );
1955 /* If there are ops pending because of a writewaiter,
1958 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
1959 if ( !c->c_writewaiter ) break;
1960 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
1962 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
1963 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1965 /* pending operations should not be marked for abandonment */
1966 assert(!op->o_abandon);
1968 c->c_n_ops_pending--;
1969 c->c_n_ops_executing++;
1971 connection_op_activate( op );
1976 connection_return( c );
1981 typedef struct conn_fake_extblock {
1984 } conn_fake_extblock;
1987 connection_fake_destroy(
1991 Connection conn = {0};
1993 Opheader ohdr = {0};
1995 conn_fake_extblock *eb = data;
1998 op.o_hdr->oh_extensions = eb->eb_op;
1999 conn.c_extensions = eb->eb_conn;
2004 ber_memfree_x( eb, NULL );
2005 slapi_int_free_object_extensions( SLAPI_X_EXT_OPERATION, &op );
2006 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION, &conn );
2011 connection_fake_init(
2013 OperationBuffer *opbuf,
2016 connection_fake_init2( conn, opbuf, ctx, 1 );
2020 operation_fake_init(
2026 /* set memory context */
2027 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx,
2029 op->o_tmpmfuncs = &slap_sl_mfuncs;
2030 op->o_threadctx = ctx;
2031 op->o_tid = ldap_pvt_thread_pool_tid( ctx );
2033 op->o_counters = &slap_counters;
2035 op->o_connid = op->o_conn->c_connid;
2036 connection_init_log_prefix( op );
2041 connection_fake_init2(
2043 OperationBuffer *opbuf,
2047 Operation *op = (Operation *) opbuf;
2049 conn->c_connid = -1;
2050 conn->c_conn_idx = -1;
2051 conn->c_send_ldap_result = slap_send_ldap_result;
2052 conn->c_send_search_entry = slap_send_search_entry;
2053 conn->c_send_search_reference = slap_send_search_reference;
2054 conn->c_send_ldap_extended = slap_send_ldap_extended;
2055 conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
2056 conn->c_listener = (Listener *)&dummy_list;
2057 conn->c_peer_domain = slap_empty_bv;
2058 conn->c_peer_name = slap_empty_bv;
2060 memset( opbuf, 0, sizeof( *opbuf ));
2061 op->o_hdr = &opbuf->ob_hdr;
2062 op->o_controls = opbuf->ob_controls;
2064 operation_fake_init( conn, op, ctx, newmem );
2067 if ( slapi_plugins_used ) {
2068 conn_fake_extblock *eb;
2071 /* Use thread keys to make sure these eventually get cleaned up */
2072 if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
2074 eb = ch_malloc( sizeof( *eb ));
2075 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
2076 slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
2077 eb->eb_conn = conn->c_extensions;
2078 eb->eb_op = op->o_hdr->oh_extensions;
2079 ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
2080 eb, connection_fake_destroy, NULL, NULL );
2083 conn->c_extensions = eb->eb_conn;
2084 op->o_hdr->oh_extensions = eb->eb_op;
2087 #endif /* LDAP_SLAPI */
2089 slap_op_time( &op->o_time, &op->o_tincr );
2093 connection_assign_nextid( Connection *conn )
2095 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2096 conn->c_connid = conn_nextid++;
2097 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );