2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2005 The OpenLDAP Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
11 * A copy of this license is available in the file LICENSE in the
12 * top-level directory of the distribution or, alternatively, at
13 * <http://www.OpenLDAP.org/license.html>.
15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
16 * All rights reserved.
18 * Redistribution and use in source and binary forms are permitted
19 * provided that this notice is preserved and that due credit is given
20 * to the University of Michigan at Ann Arbor. The name of the University
21 * may not be used to endorse or promote products derived from this
22 * software without specific prior written permission. This software
23 * is provided ``as is'' without express or implied warranty.
33 #include <ac/socket.h>
35 #include <ac/string.h>
37 #include <ac/unistd.h>
43 #include "slapi/slapi.h"
47 #ifdef SLAP_MULTI_CONN_ARRAY
48 /* for Multiple Connection Arrary (MCA) Support */
49 static ldap_pvt_thread_mutex_t* connections_mutex;
50 static Connection **connections = NULL;
52 /* set to the number of processors (round up to a power of 2) */
53 # define NUM_CONNECTION_ARRAY 4
55 /* partition the array in a modulo manner */
56 # define MCA_conn_array_id(fd) ((int)(fd)%NUM_CONNECTION_ARRAY)
57 # define MCA_conn_array_element_id(fd) ((int)(fd)/NUM_CONNECTION_ARRAY)
58 # define MCA_GET_CONNECTION(fd) (&(connections[MCA_conn_array_id(fd)]) \
59 [MCA_conn_array_element_id(fd)])
60 # define MCA_GET_CONN_MUTEX(fd) (&connections_mutex[MCA_conn_array_id(fd)])
63 /* protected by connections_mutex */
64 static ldap_pvt_thread_mutex_t connections_mutex;
65 static Connection *connections = NULL;
67 # define MCA_GET_CONNECTION(fd) (&connections[s])
68 # define MCA_GET_CONN_MUTEX(fd) (&connections_mutex)
71 static ldap_pvt_thread_mutex_t conn_nextid_mutex;
72 static unsigned long conn_nextid = 0;
74 static const char conn_lost_str[] = "connection lost";
76 /* structure state (protected by connections_mutex) */
77 #define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */
78 #define SLAP_C_UNUSED 0x01
79 #define SLAP_C_USED 0x02
81 /* connection state (protected by c_mutex ) */
82 #define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */
83 #define SLAP_C_INACTIVE 0x01 /* zero threads */
84 #define SLAP_C_ACTIVE 0x02 /* one or more threads */
85 #define SLAP_C_BINDING 0x03 /* binding */
86 #define SLAP_C_CLOSING 0x04 /* closing */
87 #define SLAP_C_CLIENT 0x05 /* outbound client conn */
90 connection_state2str( int state )
93 case SLAP_C_INVALID: return "!";
94 case SLAP_C_INACTIVE: return "|";
95 case SLAP_C_ACTIVE: return "";
96 case SLAP_C_BINDING: return "B";
97 case SLAP_C_CLOSING: return "C";
98 case SLAP_C_CLIENT: return "L";
104 static Connection* connection_get( ber_socket_t s );
106 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
107 static int connection_input( Connection *c, Operation** op );
109 static int connection_input( Connection *c );
111 static void connection_close( Connection *c );
113 static int connection_op_activate( Operation *op );
114 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
115 static void connection_op_queue( Operation *op );
117 static int connection_resched( Connection *conn );
118 static void connection_abandon( Connection *conn );
119 static void connection_destroy( Connection *c );
121 static ldap_pvt_thread_start_t connection_operation;
124 * Initialize connection management infrastructure.
126 int connections_init(void)
127 #ifdef SLAP_MULTI_CONN_ARRAY
132 assert( connections == NULL );
134 if( connections != NULL) {
135 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
140 connections_mutex = (ldap_pvt_thread_mutex_t*) ch_calloc(
141 NUM_CONNECTION_ARRAY, sizeof(ldap_pvt_thread_mutex_t) );
142 if( connections_mutex == NULL ) {
143 Debug( LDAP_DEBUG_ANY, "connections_init: "
144 "allocation of connection mutex[%d] failed\n", i, 0, 0 );
148 connections = (Connection**) ch_calloc(
149 NUM_CONNECTION_ARRAY, sizeof(Connection*));
150 if( connections == NULL ) {
151 Debug( LDAP_DEBUG_ANY, "connections_init: "
152 "allocation of connection[%d] failed\n", 0, 0, 0 );
156 for ( i = 0; i < NUM_CONNECTION_ARRAY; i++ ) {
157 ldap_pvt_thread_mutex_init( connections_mutex+i );
158 connections[i] = (Connection*) ch_calloc(
159 dtblsize/NUM_CONNECTION_ARRAY, sizeof(Connection) );
160 if( connections[i] == NULL ) {
161 Debug( LDAP_DEBUG_ANY, "connections_init: "
162 "allocation (%d*%ld) of connection array[%d] failed\n",
163 dtblsize, (long) sizeof(Connection), i );
168 /* should check return of every call */
169 ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
171 assert( connections[0]->c_struct_state == SLAP_C_UNINITIALIZED );
172 assert( connections[NUM_CONNECTION_ARRAY-1]->c_struct_state ==
173 SLAP_C_UNINITIALIZED );
175 for ( i = 0; i < NUM_CONNECTION_ARRAY; i++ ) {
176 conn = connections[i];
177 for ( j = 0; j < (dtblsize/NUM_CONNECTION_ARRAY); j++ ) {
178 conn[j].c_conn_idx = j;
183 * per entry initialization of the Connection array initialization
184 * will be done by connection_init()
193 assert( connections == NULL );
195 if( connections != NULL) {
196 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
201 /* should check return of every call */
202 ldap_pvt_thread_mutex_init( &connections_mutex );
203 ldap_pvt_thread_mutex_init( &conn_nextid_mutex );
205 connections = (Connection *) ch_calloc( dtblsize, sizeof(Connection) );
207 if( connections == NULL ) {
208 Debug( LDAP_DEBUG_ANY, "connections_init: "
209 "allocation (%d*%ld) of connection array failed\n",
210 dtblsize, (long) sizeof(Connection), 0 );
214 assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
215 assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
217 for (i=0; i<dtblsize; i++) connections[i].c_conn_idx = i;
220 * per entry initialization of the Connection array initialization
221 * will be done by connection_init()
229 * Destroy connection management infrastructure.
232 int connections_destroy(void)
233 #ifdef SLAP_MULTI_CONN_ARRAY
238 if( connections == NULL) {
239 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
244 for ( i = 0; i < NUM_CONNECTION_ARRAY; i++ ) {
245 Connection* conn = connections[i];
246 for ( j = 0; j < (dtblsize/NUM_CONNECTION_ARRAY); j++ ) {
247 if( conn[j].c_struct_state != SLAP_C_UNINITIALIZED ) {
248 ber_sockbuf_free( conn[j].c_sb );
249 ldap_pvt_thread_mutex_destroy( &conn[j].c_mutex );
250 ldap_pvt_thread_mutex_destroy( &conn[j].c_write_mutex );
251 ldap_pvt_thread_cond_destroy( &conn[j].c_write_cv );
254 if ( slapi_plugins_used ) {
255 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
263 for ( i = 0; i < NUM_CONNECTION_ARRAY; i++ ) {
264 free( connections[i] );
265 connections[i] = NULL;
266 ldap_pvt_thread_mutex_destroy( &connections_mutex[i] );
269 ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
278 /* should check return of every call */
280 if( connections == NULL) {
281 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
286 for ( i = 0; i < dtblsize; i++ ) {
287 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
288 ber_sockbuf_free( connections[i].c_sb );
289 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
290 ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
291 ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
293 if ( slapi_plugins_used ) {
294 slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
304 ldap_pvt_thread_mutex_destroy( &connections_mutex );
305 ldap_pvt_thread_mutex_destroy( &conn_nextid_mutex );
311 * shutdown all connections
313 int connections_shutdown(void)
314 #ifdef SLAP_MULTI_CONN_ARRAY
319 for ( i = 0; i < NUM_CONNECTION_ARRAY; i++ ) {
320 Connection* conn = connections[i];
321 ldap_pvt_thread_mutex_lock( &connections_mutex[i] );
322 for ( j = 0; j < (dtblsize/NUM_CONNECTION_ARRAY); j++ ) {
323 if( conn[j].c_struct_state != SLAP_C_USED ) {
326 /* give persistent clients a chance to cleanup */
327 if( conn[j].c_conn_state == SLAP_C_CLIENT ) {
328 ldap_pvt_thread_pool_submit( &connection_pool,
329 conn[j].c_clientfunc, conn[j].c_clientarg );
333 ldap_pvt_thread_mutex_lock( &conn[j].c_mutex );
334 /* connections_mutex and c_mutex are locked */
335 connection_closing( &conn[j], "connection shutdown" );
336 connection_close( &conn[j] );
337 ldap_pvt_thread_mutex_unlock( &conn[j].c_mutex );
340 ldap_pvt_thread_mutex_unlock( &connections_mutex[i] );
350 ldap_pvt_thread_mutex_lock( &connections_mutex );
352 for ( i = 0; i < dtblsize; i++ ) {
353 if( connections[i].c_struct_state != SLAP_C_USED ) {
356 /* give persistent clients a chance to cleanup */
357 if( connections[i].c_conn_state == SLAP_C_CLIENT ) {
358 ldap_pvt_thread_pool_submit( &connection_pool,
359 connections[i].c_clientfunc, connections[i].c_clientarg );
363 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
365 /* connections_mutex and c_mutex are locked */
366 connection_closing( &connections[i], "slapd shutdown" );
367 connection_close( &connections[i] );
369 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
372 ldap_pvt_thread_mutex_unlock( &connections_mutex );
379 * Timeout idle connections.
381 int connections_timeout_idle(time_t now)
387 for( c = connection_first( &connindex );
389 c = connection_next( c, &connindex ) )
391 /* Don't timeout a slow-running request or a persistent
392 * outbound connection */
393 if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
397 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
399 connection_closing( c, "idletimeout" );
400 connection_close( c );
404 connection_done( c );
409 static Connection* connection_get( ber_socket_t s )
411 /* connections_mutex should be locked by caller */
415 Debug( LDAP_DEBUG_ARGS,
416 "connection_get(%ld)\n",
419 assert( connections != NULL );
421 if(s == AC_SOCKET_INVALID) return NULL;
424 c = MCA_GET_CONNECTION(s);
426 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
433 for(i=0; i<dtblsize; i++) {
434 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
435 assert( connections[i].c_conn_state == SLAP_C_INVALID );
436 assert( connections[i].c_sb == 0 );
440 ber_sockbuf_ctrl( connections[i].c_sb,
441 LBER_SB_OPT_GET_FD, &sd );
443 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
444 assert( connections[i].c_conn_state == SLAP_C_INVALID );
445 assert( sd == AC_SOCKET_INVALID );
449 /* state can actually change from used -> unused by resched,
450 * so don't assert details here.
464 ldap_pvt_thread_mutex_lock( &c->c_mutex );
466 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
467 if( c->c_struct_state != SLAP_C_USED ) {
468 /* connection must have been closed due to resched */
470 assert( c->c_conn_state == SLAP_C_INVALID );
471 assert( sd == AC_SOCKET_INVALID );
473 Debug( LDAP_DEBUG_TRACE,
474 "connection_get(%d): connection not used\n",
477 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
481 Debug( LDAP_DEBUG_TRACE,
482 "connection_get(%d): got connid=%lu\n",
487 assert( c->c_struct_state == SLAP_C_USED );
488 assert( c->c_conn_state != SLAP_C_INVALID );
489 assert( sd != AC_SOCKET_INVALID );
491 #ifndef SLAPD_MONITOR
492 if ( global_idletimeout > 0 )
493 #endif /* ! SLAPD_MONITOR */
495 c->c_activitytime = slap_get_time();
502 static void connection_return( Connection *c )
504 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
507 long connection_init(
511 const char* peername,
514 struct berval *authid )
519 assert( connections != NULL );
521 assert( listener != NULL );
522 assert( dnsname != NULL );
523 assert( peername != NULL );
526 assert( flags != CONN_IS_TLS );
529 if( s == AC_SOCKET_INVALID ) {
530 Debug( LDAP_DEBUG_ANY,
531 "connection_init: init of socket %ld invalid.\n", (long)s, 0, 0 );
537 assert( s < dtblsize );
540 ldap_pvt_thread_mutex_lock( MCA_GET_CONN_MUTEX(s) );
543 c = MCA_GET_CONNECTION(s);
549 for( i=0; i < dtblsize; i++) {
552 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
553 assert( connections[i].c_sb == 0 );
558 sd = AC_SOCKET_INVALID;
559 if (connections[i].c_sb != NULL) {
560 ber_sockbuf_ctrl( connections[i].c_sb,
561 LBER_SB_OPT_GET_FD, &sd );
564 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
565 assert( sd == AC_SOCKET_INVALID );
570 if( connections[i].c_conn_state == SLAP_C_CLIENT ) continue;
572 assert( connections[i].c_struct_state == SLAP_C_USED );
573 assert( connections[i].c_conn_state != SLAP_C_INVALID );
574 assert( sd != AC_SOCKET_INVALID );
578 Debug( LDAP_DEBUG_ANY,
579 "connection_init(%d): connection table full "
580 "(%d/%d)\n", s, i, dtblsize);
581 ldap_pvt_thread_mutex_unlock( &connections_mutex );
589 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
590 c->c_send_ldap_result = slap_send_ldap_result;
591 c->c_send_search_entry = slap_send_search_entry;
592 c->c_send_search_reference = slap_send_search_reference;
593 c->c_send_ldap_extended = slap_send_ldap_extended;
594 #ifdef LDAP_RES_INTERMEDIATE
595 c->c_send_ldap_intermediate = slap_send_ldap_intermediate;
598 BER_BVZERO( &c->c_authmech );
599 BER_BVZERO( &c->c_dn );
600 BER_BVZERO( &c->c_ndn );
602 c->c_listener = NULL;
603 BER_BVZERO( &c->c_peer_domain );
604 BER_BVZERO( &c->c_peer_name );
606 LDAP_STAILQ_INIT(&c->c_ops);
607 LDAP_STAILQ_INIT(&c->c_pending_ops);
609 BER_BVZERO( &c->c_sasl_bind_mech );
611 c->c_sasl_authctx = NULL;
612 c->c_sasl_sockctx = NULL;
613 c->c_sasl_extra = NULL;
614 c->c_sasl_bindop = NULL;
616 c->c_sb = ber_sockbuf_alloc( );
619 ber_len_t max = sockbuf_max_incoming;
620 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
623 c->c_currentber = NULL;
625 /* should check status of thread calls */
626 ldap_pvt_thread_mutex_init( &c->c_mutex );
627 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
628 ldap_pvt_thread_cond_init( &c->c_write_cv );
631 if ( slapi_plugins_used ) {
632 slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, c );
636 c->c_struct_state = SLAP_C_UNUSED;
639 ldap_pvt_thread_mutex_lock( &c->c_mutex );
641 assert( c->c_struct_state == SLAP_C_UNUSED );
642 assert( BER_BVISNULL( &c->c_authmech ) );
643 assert( BER_BVISNULL( &c->c_dn ) );
644 assert( BER_BVISNULL( &c->c_ndn ) );
645 assert( c->c_listener == NULL );
646 assert( BER_BVISNULL( &c->c_peer_domain ) );
647 assert( BER_BVISNULL( &c->c_peer_name ) );
648 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
649 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
650 assert( BER_BVISNULL( &c->c_sasl_bind_mech ) );
651 assert( c->c_sasl_done == 0 );
652 assert( c->c_sasl_authctx == NULL );
653 assert( c->c_sasl_sockctx == NULL );
654 assert( c->c_sasl_extra == NULL );
655 assert( c->c_sasl_bindop == NULL );
656 assert( c->c_currentber == NULL );
657 assert( c->c_writewaiter == 0);
659 c->c_listener = listener;
661 if ( flags == CONN_IS_CLIENT ) {
662 c->c_conn_state = SLAP_C_CLIENT;
663 c->c_struct_state = SLAP_C_USED;
664 c->c_close_reason = "?"; /* should never be needed */
665 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &s );
666 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
667 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
672 ber_str2bv( dnsname, 0, 1, &c->c_peer_domain );
673 ber_str2bv( peername, 0, 1, &c->c_peer_name );
675 c->c_n_ops_received = 0;
676 c->c_n_ops_executing = 0;
677 c->c_n_ops_pending = 0;
678 c->c_n_ops_completed = 0;
684 /* set to zero until bind, implies LDAP_VERSION3 */
687 #ifndef SLAPD_MONITOR
688 if ( global_idletimeout > 0 )
689 #endif /* ! SLAPD_MONITOR */
691 c->c_activitytime = c->c_starttime = slap_get_time();
694 #ifdef LDAP_CONNECTIONLESS
696 if( flags == CONN_IS_UDP ) {
699 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
700 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
702 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
703 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
704 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
705 LBER_SBIOD_LEVEL_PROVIDER, NULL );
710 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
711 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
713 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
714 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
718 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
719 INT_MAX, (void*)"ldap_" );
722 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
723 c /* non-NULL */ ) < 0 )
725 Debug( LDAP_DEBUG_ANY,
726 "connection_init(%d, %s): set nonblocking failed\n",
727 s, c->c_peer_name.bv_val, 0 );
730 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
731 id = c->c_connid = conn_nextid++;
732 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
734 c->c_conn_state = SLAP_C_INACTIVE;
735 c->c_struct_state = SLAP_C_USED;
736 c->c_close_reason = "?"; /* should never be needed */
738 c->c_ssf = c->c_transport_ssf = ssf;
742 if ( flags == CONN_IS_TLS ) {
744 c->c_needs_tls_accept = 1;
747 c->c_needs_tls_accept = 0;
751 slap_sasl_open( c, 0 );
752 slap_sasl_external( c, ssf, authid );
754 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
755 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
757 backend_connection_init(c);
762 void connection2anonymous( Connection *c )
764 assert( connections != NULL );
768 ber_len_t max = sockbuf_max_incoming;
769 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
772 if ( !BER_BVISNULL( &c->c_authmech ) ) {
773 ch_free(c->c_authmech.bv_val);
775 BER_BVZERO( &c->c_authmech );
777 if ( !BER_BVISNULL( &c->c_dn ) ) {
778 ch_free(c->c_dn.bv_val);
780 BER_BVZERO( &c->c_dn );
782 if ( !BER_BVISNULL( &c->c_ndn ) ) {
783 ch_free(c->c_ndn.bv_val);
785 BER_BVZERO( &c->c_ndn );
787 if ( !BER_BVISNULL( &c->c_sasl_authz_dn ) ) {
788 ber_memfree_x( c->c_sasl_authz_dn.bv_val, NULL );
790 BER_BVZERO( &c->c_sasl_authz_dn );
792 c->c_authz_backend = NULL;
796 connection_destroy( Connection *c )
798 /* note: connections_mutex should be locked by caller */
800 unsigned long connid;
801 const char *close_reason;
803 assert( connections != NULL );
805 assert( c->c_struct_state != SLAP_C_UNUSED );
806 assert( c->c_conn_state != SLAP_C_INVALID );
807 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
808 assert( c->c_writewaiter == 0);
810 /* only for stats (print -1 as "%lu" may give unexpected results ;) */
811 connid = c->c_connid;
812 close_reason = c->c_close_reason;
814 backend_connection_destroy(c);
819 c->c_activitytime = c->c_starttime = 0;
821 connection2anonymous( c );
822 c->c_listener = NULL;
824 if(c->c_peer_domain.bv_val != NULL) {
825 free(c->c_peer_domain.bv_val);
827 BER_BVZERO( &c->c_peer_domain );
828 if(c->c_peer_name.bv_val != NULL) {
829 free(c->c_peer_name.bv_val);
831 BER_BVZERO( &c->c_peer_name );
833 c->c_sasl_bind_in_progress = 0;
834 if(c->c_sasl_bind_mech.bv_val != NULL) {
835 free(c->c_sasl_bind_mech.bv_val);
837 BER_BVZERO( &c->c_sasl_bind_mech );
839 slap_sasl_close( c );
841 if ( c->c_currentber != NULL ) {
842 ber_free( c->c_currentber, 1 );
843 c->c_currentber = NULL;
846 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
847 if ( sd != AC_SOCKET_INVALID ) {
848 slapd_remove( sd, 1, 0 );
850 Statslog( LDAP_DEBUG_STATS, (close_reason
851 ? "conn=%lu fd=%ld closed (%s)\n"
852 : "conn=%lu fd=%ld closed\n"),
853 connid, (long) sd, close_reason, 0, 0 );
856 ber_sockbuf_free( c->c_sb );
858 c->c_sb = ber_sockbuf_alloc( );
861 ber_len_t max = sockbuf_max_incoming;
862 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
865 c->c_conn_state = SLAP_C_INVALID;
866 c->c_struct_state = SLAP_C_UNUSED;
867 c->c_close_reason = "?"; /* should never be needed */
870 /* call destructors, then constructors; avoids unnecessary allocation */
871 if ( slapi_plugins_used ) {
872 slapi_int_clear_object_extensions( SLAPI_X_EXT_CONNECTION, c );
877 int connection_state_closing( Connection *c )
879 /* c_mutex must be locked by caller */
883 assert( c->c_struct_state == SLAP_C_USED );
885 state = c->c_conn_state;
887 assert( state != SLAP_C_INVALID );
889 return state == SLAP_C_CLOSING;
892 static void connection_abandon( Connection *c )
894 /* c_mutex must be locked by caller */
896 Operation *o, *next, op = {0};
902 op.o_connid = c->c_connid;
903 op.o_tag = LDAP_REQ_ABANDON;
904 for ( o = LDAP_STAILQ_FIRST( &c->c_ops ); o; o=next ) {
905 next = LDAP_STAILQ_NEXT( o, o_next );
906 op.orn_msgid = o->o_msgid;
908 op.o_bd = frontendDB;
909 frontendDB->be_abandon( &op, &rs );
912 /* remove pending operations */
913 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
914 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
915 LDAP_STAILQ_NEXT(o, o_next) = NULL;
920 void connection_closing( Connection *c, const char *why )
922 assert( connections != NULL );
924 assert( c->c_struct_state == SLAP_C_USED );
925 assert( c->c_conn_state != SLAP_C_INVALID );
927 /* c_mutex must be locked by caller */
929 if( c->c_conn_state != SLAP_C_CLOSING ) {
932 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
933 Debug( LDAP_DEBUG_TRACE,
934 "connection_closing: readying conn=%lu sd=%d for close\n",
935 c->c_connid, sd, 0 );
936 /* update state to closing */
937 c->c_conn_state = SLAP_C_CLOSING;
938 c->c_close_reason = why;
940 /* don't listen on this port anymore */
941 slapd_clr_read( sd, 1 );
943 /* abandon active operations */
944 connection_abandon( c );
946 /* wake write blocked operations */
947 slapd_clr_write( sd, 1 );
948 if ( c->c_writewaiter ) {
949 ldap_pvt_thread_cond_signal( &c->c_write_cv );
950 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
951 ldap_pvt_thread_yield();
952 ldap_pvt_thread_mutex_lock( &c->c_mutex );
954 } else if( why == NULL && c->c_close_reason == conn_lost_str ) {
955 /* Client closed connection after doing Unbind. */
956 c->c_close_reason = NULL;
960 static void connection_close( Connection *c )
964 assert( connections != NULL );
966 assert( c->c_struct_state == SLAP_C_USED );
967 assert( c->c_conn_state == SLAP_C_CLOSING );
969 /* note: connections_mutex and c_mutex should be locked by caller */
971 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
972 if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
973 Debug( LDAP_DEBUG_TRACE,
974 "connection_close: deferring conn=%lu sd=%d\n",
975 c->c_connid, sd, 0 );
979 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%lu sd=%d\n",
980 c->c_connid, sd, 0 );
981 connection_destroy( c );
984 unsigned long connections_nextid(void)
987 assert( connections != NULL );
989 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
993 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
998 Connection* connection_first( ber_socket_t *index )
1000 #ifdef SLAP_MULTI_CONN_ARRAY
1004 assert( connections != NULL );
1005 assert( index != NULL );
1007 #ifdef SLAP_MULTI_CONN_ARRAY
1008 for ( conn_array_id = 0;
1009 conn_array_id < NUM_CONNECTION_ARRAY;
1012 ldap_pvt_thread_mutex_lock( &connections_mutex[ conn_array_id ] );
1015 ldap_pvt_thread_mutex_lock( &connections_mutex );
1020 return connection_next(NULL, index);
1023 Connection* connection_next( Connection *c, ber_socket_t *index )
1024 #ifdef SLAP_MULTI_CONN_ARRAY
1028 assert( connections != NULL );
1029 assert( index != NULL );
1030 assert( *index <= (dtblsize/NUM_CONNECTION_ARRAY) );
1032 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
1036 for(; *index < dtblsize; (*index)++) {
1037 conn = MCA_GET_CONNECTION(*index);
1038 if( conn->c_struct_state == SLAP_C_UNINITIALIZED ) {
1039 assert( conn->c_conn_state == SLAP_C_INVALID );
1040 #ifndef HAVE_WINSOCK
1047 if( conn->c_struct_state == SLAP_C_USED ) {
1048 assert( conn->c_conn_state != SLAP_C_INVALID );
1054 assert( conn->c_struct_state == SLAP_C_UNUSED );
1055 assert( conn->c_conn_state == SLAP_C_INVALID );
1058 if( c != NULL ) ldap_pvt_thread_mutex_lock( &c->c_mutex );
1065 assert( connections != NULL );
1066 assert( index != NULL );
1067 assert( *index <= dtblsize );
1069 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
1073 for(; *index < dtblsize; (*index)++) {
1074 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
1075 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
1076 #ifndef HAVE_WINSOCK
1083 if( connections[*index].c_struct_state == SLAP_C_USED ) {
1084 assert( connections[*index].c_conn_state != SLAP_C_INVALID );
1085 c = &connections[(*index)++];
1089 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
1090 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
1093 if( c != NULL ) ldap_pvt_thread_mutex_lock( &c->c_mutex );
1098 void connection_done( Connection *c )
1100 #ifdef SLAP_MULTI_CONN_ARRAY
1104 assert( connections != NULL );
1106 if( c != NULL ) ldap_pvt_thread_mutex_unlock( &c->c_mutex );
1108 #ifdef SLAP_MULTI_CONN_ARRAY
1109 for ( conn_array_id = 0;
1110 conn_array_id < NUM_CONNECTION_ARRAY;
1113 ldap_pvt_thread_mutex_unlock( &connections_mutex[ conn_array_id ] );
1116 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1121 * connection_activity - handle the request operation op on connection
1122 * conn. This routine figures out what kind of operation it is and
1123 * calls the appropriate stub to handle it.
1126 #ifdef SLAPD_MONITOR
1127 /* FIXME: returns 0 in case of failure */
1128 #define INCR_OP_INITIATED(index) \
1130 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1131 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated_[(index)], 1); \
1132 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1134 #define INCR_OP_COMPLETED(index) \
1136 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1137 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
1138 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed_[(index)], 1); \
1139 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1141 #else /* !SLAPD_MONITOR */
1142 #define INCR_OP_INITIATED(index) do { } while (0)
1143 #define INCR_OP_COMPLETED(index) \
1145 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex ); \
1146 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_completed, 1); \
1147 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex ); \
1149 #endif /* !SLAPD_MONITOR */
1152 * NOTE: keep in sync with enum in slapd.h
1154 static int (*opfun[])( Operation *op, SlapReply *rs ) = {
1169 connection_operation( void *ctx, void *arg_v )
1171 int rc = LDAP_OTHER;
1172 Operation *op = arg_v;
1173 SlapReply rs = {REP_RESULT};
1174 ber_tag_t tag = op->o_tag;
1176 Connection *conn = op->o_conn;
1177 void *memctx = NULL;
1178 void *memctx_null = NULL;
1181 ldap_pvt_thread_mutex_lock( &slap_counters.sc_ops_mutex );
1182 /* FIXME: returns 0 in case of failure */
1183 ldap_pvt_mp_add_ulong(slap_counters.sc_ops_initiated, 1);
1184 ldap_pvt_thread_mutex_unlock( &slap_counters.sc_ops_mutex );
1186 op->o_threadctx = ctx;
1190 case LDAP_REQ_UNBIND:
1192 case LDAP_REQ_DELETE:
1193 case LDAP_REQ_MODDN:
1194 case LDAP_REQ_MODIFY:
1195 case LDAP_REQ_COMPARE:
1196 case LDAP_REQ_SEARCH:
1197 case LDAP_REQ_ABANDON:
1198 case LDAP_REQ_EXTENDED:
1201 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1202 "conn %lu unknown LDAP request 0x%lx\n",
1203 conn->c_connid, tag, 0 );
1204 op->o_tag = LBER_ERROR;
1205 rs.sr_err = LDAP_PROTOCOL_ERROR;
1206 rs.sr_text = "unknown LDAP request";
1207 send_ldap_disconnect( op, &rs );
1208 rc = SLAPD_DISCONNECT;
1209 goto operations_error;
1212 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
1213 Debug( LDAP_DEBUG_ANY, "connection_operation: "
1214 "error: SASL bind in progress (tag=%ld).\n",
1216 send_ldap_error( op, &rs, LDAP_OPERATIONS_ERROR,
1217 "SASL bind in progress" );
1218 rc = LDAP_OPERATIONS_ERROR;
1219 goto operations_error;
1222 /* We can use Thread-Local storage for most mallocs. We can
1223 * also use TL for ber parsing, but not on Add or Modify.
1226 memsiz = ber_len( op->o_ber ) * 64;
1227 if ( SLAP_SLAB_SIZE > memsiz ) memsiz = SLAP_SLAB_SIZE;
1229 memsiz = SLAP_SLAB_SIZE;
1231 memctx = slap_sl_mem_create( memsiz, SLAP_SLAB_STACK, ctx );
1232 op->o_tmpmemctx = memctx;
1233 op->o_tmpmfuncs = &slap_sl_mfuncs;
1234 if ( tag != LDAP_REQ_ADD && tag != LDAP_REQ_MODIFY ) {
1235 /* Note - the ber and its buffer are already allocated from
1236 * regular memory; this only affects subsequent mallocs that
1237 * ber_scanf may invoke.
1239 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx );
1244 opidx = SLAP_OP_BIND;
1247 case LDAP_REQ_UNBIND:
1248 opidx = SLAP_OP_UNBIND;
1252 opidx = SLAP_OP_ADD;
1255 case LDAP_REQ_DELETE:
1256 opidx = SLAP_OP_DELETE;
1259 case LDAP_REQ_MODRDN:
1260 opidx = SLAP_OP_MODRDN;
1263 case LDAP_REQ_MODIFY:
1264 opidx = SLAP_OP_MODIFY;
1267 case LDAP_REQ_COMPARE:
1268 opidx = SLAP_OP_COMPARE;
1271 case LDAP_REQ_SEARCH:
1272 opidx = SLAP_OP_SEARCH;
1275 case LDAP_REQ_ABANDON:
1276 opidx = SLAP_OP_ABANDON;
1279 case LDAP_REQ_EXTENDED:
1280 opidx = SLAP_OP_EXTENDED;
1288 assert( opidx > -1 );
1289 INCR_OP_INITIATED( opidx );
1290 rc = (*(opfun[opidx]))( op, &rs );
1293 if ( rc == SLAPD_DISCONNECT ) {
1296 } else if ( opidx > -1 ) {
1297 /* increment completed operations count
1298 * only if operation was initiated
1299 * and rc != SLAPD_DISCONNECT */
1300 INCR_OP_COMPLETED( opidx );
1303 if ( op->o_cancel == SLAP_CANCEL_REQ ) {
1304 if ( rc == SLAPD_ABANDON ) {
1305 op->o_cancel = SLAP_CANCEL_ACK;
1307 op->o_cancel = LDAP_TOO_LATE;
1310 while ( op->o_cancel != SLAP_CANCEL_NONE &&
1311 op->o_cancel != SLAP_CANCEL_DONE )
1313 ldap_pvt_thread_yield();
1316 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1318 ber_set_option( op->o_ber, LBER_OPT_BER_MEMCTX, &memctx_null );
1320 LDAP_STAILQ_REMOVE( &conn->c_ops, op, slap_op, o_next);
1321 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1323 conn->c_n_ops_executing--;
1324 conn->c_n_ops_completed++;
1328 case LDAP_REQ_UNBIND:
1329 /* c_mutex is locked */
1330 connection_closing( conn,
1331 tag == LDAP_REQ_UNBIND ? NULL : "operations error" );
1335 conn->c_sasl_bind_in_progress =
1336 rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1338 if( conn->c_conn_state == SLAP_C_BINDING) {
1339 conn->c_conn_state = SLAP_C_ACTIVE;
1343 connection_resched( conn );
1344 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1348 static const Listener dummy_list = { BER_BVC(""), BER_BVC("") };
1350 int connection_client_setup(
1352 ldap_pvt_thread_start_t *func,
1358 rc = connection_init( s, (Listener *)&dummy_list, "", "",
1359 CONN_IS_CLIENT, 0, NULL );
1360 if ( rc < 0 ) return -1;
1362 c = connection_get( s );
1363 c->c_clientfunc = func;
1364 c->c_clientarg = arg;
1365 connection_return( c );
1366 slapd_add_internal( s, 0 );
1367 slapd_set_read( s, 1 );
1371 void connection_client_enable(
1374 slapd_set_read( s, 1 );
1377 void connection_client_stop(
1382 /* get (locked) connection */
1383 c = connection_get( s );
1385 assert( c->c_conn_state == SLAP_C_CLIENT );
1387 c->c_listener = NULL;
1388 c->c_conn_state = SLAP_C_INVALID;
1389 c->c_struct_state = SLAP_C_UNUSED;
1390 c->c_close_reason = "?"; /* should never be needed */
1391 ber_sockbuf_free( c->c_sb );
1392 c->c_sb = ber_sockbuf_alloc( );
1394 ber_len_t max = sockbuf_max_incoming;
1395 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
1398 connection_return( c );
1399 slapd_remove( s, 0, 1 );
1402 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1403 static int connection_read( ber_socket_t s, Operation** op );
1405 static void* connection_read_thread( void* ctx, void* argv )
1408 Operation* new_op = NULL;
1409 ber_socket_t s = (ber_socket_t)argv;
1412 * read incoming LDAP requests. If there is more than one,
1413 * the first one is returned with new_op
1415 if( ( rc = connection_read( s, &new_op ) ) < 0 ) {
1416 Debug( LDAP_DEBUG_TRACE, "connection_read(%d) error\n", s, 0, 0 );
1421 /* execute the queued request in the same thread */
1423 rc = (int)connection_operation(
1424 ldap_pvt_thread_pool_context(), new_op );
1430 int connection_read_activate( ber_socket_t s )
1435 * suspend reading on this file descriptor until a connection processing
1436 * thread reads data on it. Otherwise the listener thread will repeatedly
1437 * submit the same event on it to the pool.
1439 slapd_clr_read( s, 0 );
1441 rc = ldap_pvt_thread_pool_submit( &connection_pool,
1442 connection_read_thread, (void *) s );
1445 Debug( LDAP_DEBUG_ANY,
1446 "connection_read_activiate(%d): submit failed (%d)\n",
1454 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1456 connection_read( ber_socket_t s, Operation** op )
1458 int connection_read(ber_socket_t s)
1464 assert( connections != NULL );
1466 ldap_pvt_thread_mutex_lock( MCA_GET_CONN_MUTEX(s) );
1468 /* get (locked) connection */
1469 c = connection_get( s );
1472 Debug( LDAP_DEBUG_ANY,
1473 "connection_read(%ld): no connection!\n",
1475 slapd_remove(s, 1, 0);
1477 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1483 if( c->c_conn_state == SLAP_C_CLOSING ) {
1484 Debug( LDAP_DEBUG_TRACE,
1485 "connection_read(%d): closing, ignoring input for id=%lu\n",
1486 s, c->c_connid, 0 );
1487 connection_return( c );
1488 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1490 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1491 slapd_set_read( s, 1);
1496 if ( c->c_conn_state == SLAP_C_CLIENT ) {
1497 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1498 /* read should already be cleared */
1500 slapd_clr_read( s, 0 );
1502 ldap_pvt_thread_pool_submit( &connection_pool,
1503 c->c_clientfunc, c->c_clientarg );
1505 connection_return( c );
1506 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1510 Debug( LDAP_DEBUG_TRACE,
1511 "connection_read(%d): checking for input on id=%lu\n",
1512 s, c->c_connid, 0 );
1515 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1516 rc = ldap_pvt_tls_accept( c->c_sb, slap_tls_ctx );
1518 Debug( LDAP_DEBUG_TRACE,
1519 "connection_read(%d): TLS accept error "
1520 "error=%d id=%lu, closing\n",
1521 s, rc, c->c_connid );
1523 c->c_needs_tls_accept = 0;
1524 /* connections_mutex and c_mutex are locked */
1525 connection_closing( c, "TLS negotiation failure" );
1531 /* Drain input before close, to allow SSL error codes
1532 * to propagate to client. */
1538 rc = select(s+1, &rfd, NULL, NULL, &tv);
1540 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN, NULL);
1546 connection_close( c );
1548 } else if ( rc == 0 ) {
1550 struct berval authid = BER_BVNULL;
1552 c->c_needs_tls_accept = 0;
1554 /* we need to let SASL know */
1555 ssl = ldap_pvt_tls_sb_ctx( c->c_sb );
1557 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1558 if( c->c_tls_ssf > c->c_ssf ) {
1559 c->c_ssf = c->c_tls_ssf;
1562 rc = dnX509peerNormalize( ssl, &authid );
1563 if ( rc != LDAP_SUCCESS ) {
1564 Debug( LDAP_DEBUG_TRACE, "connection_read(%d): "
1565 "unable to get TLS client DN, error=%d id=%lu\n",
1566 s, rc, c->c_connid );
1568 Statslog( LDAP_DEBUG_STATS,
1569 "conn=%lu fd=%d TLS established tls_ssf=%u ssf=%u\n",
1570 c->c_connid, (int) s, c->c_tls_ssf, c->c_ssf, 0 );
1571 slap_sasl_external( c, c->c_tls_ssf, &authid );
1572 if ( authid.bv_val ) free( authid.bv_val );
1575 /* if success and data is ready, fall thru to data input loop */
1577 !ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ) )
1579 connection_return( c );
1580 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1582 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1583 slapd_set_read( s, 1 );
1590 #ifdef HAVE_CYRUS_SASL
1591 if ( c->c_sasl_layers ) {
1592 /* If previous layer is not removed yet, give up for now */
1593 if ( !c->c_sasl_sockctx ) {
1594 connection_return( c );
1595 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1597 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1598 slapd_set_read( s, 1 );
1603 c->c_sasl_layers = 0;
1605 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_sockctx );
1606 if( rc != LDAP_SUCCESS ) {
1607 Debug( LDAP_DEBUG_TRACE,
1608 "connection_read(%d): SASL install error "
1609 "error=%d id=%lu, closing\n",
1610 s, rc, c->c_connid );
1612 /* connections_mutex and c_mutex are locked */
1614 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1615 slapd_set_read( s, 1 );
1618 connection_closing( c, "SASL layer install failure" );
1619 connection_close( c );
1620 connection_return( c );
1621 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1627 #define CONNECTION_INPUT_LOOP 1
1628 /* #define DATA_READY_LOOP 1 */
1631 /* How do we do this without getting into a busy loop ? */
1632 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1633 rc = connection_input( c, op );
1635 rc = connection_input( c );
1638 #ifdef DATA_READY_LOOP
1639 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DATA_READY, NULL ));
1640 #elif CONNECTION_INPUT_LOOP
1647 Debug( LDAP_DEBUG_TRACE,
1648 "connection_read(%d): input error=%d id=%lu, closing.\n",
1649 s, rc, c->c_connid );
1651 /* connections_mutex and c_mutex are locked */
1652 connection_closing( c, conn_lost_str );
1653 connection_close( c );
1654 connection_return( c );
1655 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1659 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1660 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1661 slapd_set_write( s, 0 );
1664 slapd_set_read( s, 1 );
1666 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1667 slapd_set_read( s, 1 );
1670 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1671 slapd_set_write( s, 1 );
1675 connection_return( c );
1676 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
1682 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
1683 connection_input( Connection *conn , Operation** c_op )
1685 connection_input( Connection *conn )
1694 #ifdef LDAP_CONNECTIONLESS
1700 if ( conn->c_currentber == NULL &&
1701 ( conn->c_currentber = ber_alloc()) == NULL )
1703 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1709 #ifdef LDAP_CONNECTIONLESS
1710 if ( conn->c_is_udp ) {
1711 char peername[sizeof("IP=255.255.255.255:65336")];
1713 len = ber_int_sb_read(conn->c_sb, &peeraddr, sizeof(struct sockaddr));
1714 if (len != sizeof(struct sockaddr)) return 1;
1716 sprintf( peername, "IP=%s:%d",
1717 inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1718 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1719 Statslog( LDAP_DEBUG_STATS,
1720 "conn=%lu UDP request from %s (%s) accepted.\n",
1721 conn->c_connid, peername, conn->c_sock_name.bv_val, 0, 0 );
1725 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1726 if ( tag != LDAP_TAG_MESSAGE ) {
1730 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1732 Debug( LDAP_DEBUG_TRACE,
1733 "ber_get_next on fd %d failed errno=%d (%s)\n",
1734 sd, err, sock_errstr(err) );
1735 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1736 /* log, close and send error */
1737 ber_free( conn->c_currentber, 1 );
1738 conn->c_currentber = NULL;
1745 ber = conn->c_currentber;
1746 conn->c_currentber = NULL;
1748 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1749 /* log, close and send error */
1750 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0, 0 );
1755 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1756 /* log, close and send error */
1757 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0, 0 );
1763 #ifdef LDAP_CONNECTIONLESS
1764 if( conn->c_is_udp ) {
1765 if( tag == LBER_OCTETSTRING ) {
1766 ber_get_stringa( ber, &cdn );
1767 tag = ber_peek_tag(ber, &len);
1769 if( tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH ) {
1770 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0, 0 );
1777 if(tag == LDAP_REQ_BIND) {
1778 /* immediately abandon all existing operations upon BIND */
1779 connection_abandon( conn );
1782 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1785 /* clear state if the connection is being reused from inactive */
1786 if ( conn->c_conn_state == SLAP_C_INACTIVE ) {
1787 memset( &conn->c_pagedresults_state, 0,
1788 sizeof( conn->c_pagedresults_state ) );
1791 op->o_res_ber = NULL;
1793 #ifdef LDAP_CONNECTIONLESS
1794 if (conn->c_is_udp) {
1796 ber_str2bv( cdn, 0, 1, &op->o_dn );
1797 op->o_protocol = LDAP_VERSION2;
1799 op->o_res_ber = ber_alloc_t( LBER_USE_DER );
1800 if (op->o_res_ber == NULL) return 1;
1802 rc = ber_write( op->o_res_ber, (char *)&peeraddr,
1803 sizeof(struct sockaddr), 0 );
1805 if (rc != sizeof(struct sockaddr)) {
1806 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1810 if (op->o_protocol == LDAP_VERSION2) {
1811 rc = ber_printf(op->o_res_ber, "{is{" /*}}*/, op->o_msgid, "");
1813 Debug( LDAP_DEBUG_ANY, "ber_write failed\n", 0, 0, 0 );
1818 #endif /* LDAP_CONNECTIONLESS */
1822 /* Don't process requests when the conn is in the middle of a
1823 * Bind, or if it's closing. Also, don't let any single conn
1824 * use up all the available threads, and don't execute if we're
1825 * currently blocked on output. And don't execute if there are
1826 * already pending ops, let them go first. Abandon operations
1827 * get exceptions to some, but not all, cases.
1831 /* Abandon and Unbind are exempt from these checks */
1832 if (conn->c_conn_state == SLAP_C_CLOSING) {
1835 } else if (conn->c_writewaiter) {
1836 defer = "awaiting write";
1838 } else if (conn->c_n_ops_pending) {
1839 defer = "pending operations";
1843 case LDAP_REQ_ABANDON:
1844 /* Unbind is exempt from these checks */
1845 if (conn->c_n_ops_executing >= connection_pool_max/2) {
1846 defer = "too many executing";
1848 } else if (conn->c_conn_state == SLAP_C_BINDING) {
1853 case LDAP_REQ_UNBIND:
1858 int max = conn->c_dn.bv_len
1859 ? slap_conn_max_pending_auth
1860 : slap_conn_max_pending;
1862 Debug( LDAP_DEBUG_ANY,
1863 "connection_input: conn=%lu deferring operation: %s\n",
1864 conn->c_connid, defer, 0 );
1865 conn->c_n_ops_pending++;
1866 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1867 rc = ( conn->c_n_ops_pending > max ) ? -1 : 0;
1870 conn->c_n_ops_executing++;
1874 * The first op will be processed in the same thread context,
1875 * Subsequent ops will be submitted to the pool by
1876 * calling connection_op_activate()
1878 if ( *c_op == NULL ) {
1879 /* the first incoming request */
1880 connection_op_queue( op );
1885 connection_op_activate( op );
1890 if ( conn->c_struct_state != SLAP_C_USED ) {
1891 /* connection must have got closed underneath us */
1896 assert( conn->c_struct_state == SLAP_C_USED );
1901 connection_resched( Connection *conn )
1905 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1908 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1910 /* use trylock to avoid possible deadlock */
1911 rc = ldap_pvt_thread_mutex_trylock( MCA_GET_CONN_MUTEX( sd ) );
1914 Debug( LDAP_DEBUG_TRACE,
1915 "connection_resched: reaquiring locks conn=%lu sd=%d\n",
1916 conn->c_connid, sd, 0 );
1918 * reaquire locks in the right order...
1919 * this may allow another thread to close this connection,
1920 * so recheck state below.
1922 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1923 ldap_pvt_thread_mutex_lock( MCA_GET_CONN_MUTEX ( sd ) );
1924 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1927 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1928 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1929 "closed by other thread conn=%lu sd=%d\n",
1930 conn->c_connid, sd, 0 );
1932 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1933 "attempting closing conn=%lu sd=%d\n",
1934 conn->c_connid, sd, 0 );
1935 connection_close( conn );
1938 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX( sd ) );
1942 if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
1943 /* other states need different handling */
1947 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1948 if ( conn->c_n_ops_executing > connection_pool_max/2 ) break;
1950 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1951 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1953 /* pending operations should not be marked for abandonment */
1954 assert(!op->o_abandon);
1956 conn->c_n_ops_pending--;
1957 conn->c_n_ops_executing++;
1959 connection_op_activate( op );
1961 if ( conn->c_conn_state == SLAP_C_BINDING ) break;
1967 connection_init_log_prefix( Operation *op )
1969 if ( op->o_connid == (unsigned long)(-1) ) {
1970 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1971 "conn=-1 op=%lu", op->o_opid );
1974 snprintf( op->o_log_prefix, sizeof( op->o_log_prefix ),
1975 "conn=%lu op=%lu", op->o_connid, op->o_opid );
1979 static void connection_op_queue( Operation *op )
1982 ber_tag_t tag = op->o_tag;
1984 if (tag == LDAP_REQ_BIND) {
1985 op->o_conn->c_conn_state = SLAP_C_BINDING;
1988 if (!op->o_dn.bv_len) {
1989 op->o_authz = op->o_conn->c_authz;
1990 if ( BER_BVISNULL( &op->o_conn->c_sasl_authz_dn )) {
1991 ber_dupbv( &op->o_dn, &op->o_conn->c_dn );
1992 ber_dupbv( &op->o_ndn, &op->o_conn->c_ndn );
1994 ber_dupbv( &op->o_dn, &op->o_conn->c_sasl_authz_dn );
1995 ber_dupbv( &op->o_ndn, &op->o_conn->c_sasl_authz_dn );
1999 op->o_authtype = op->o_conn->c_authtype;
2000 ber_dupbv( &op->o_authmech, &op->o_conn->c_authmech );
2002 if (!op->o_protocol) {
2003 op->o_protocol = op->o_conn->c_protocol
2004 ? op->o_conn->c_protocol : LDAP_VERSION3;
2007 if (op->o_conn->c_conn_state == SLAP_C_INACTIVE &&
2008 op->o_protocol > LDAP_VERSION2)
2010 op->o_conn->c_conn_state = SLAP_C_ACTIVE;
2013 op->o_connid = op->o_conn->c_connid;
2014 connection_init_log_prefix( op );
2016 LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op, o_next );
2019 static int connection_op_activate( Operation *op )
2022 ber_tag_t tag = op->o_tag;
2024 connection_op_queue( op );
2026 rc = ldap_pvt_thread_pool_submit( &connection_pool,
2027 connection_operation, (void *) op );
2030 Debug( LDAP_DEBUG_ANY,
2031 "connection_op_activate: submit failed (%d) for conn=%lu\n",
2032 rc, op->o_connid, 0 );
2033 /* should move op to pending list */
2039 #ifdef SLAP_LIGHTWEIGHT_DISPATCHER
2040 int connection_write_activate( ber_socket_t s )
2045 * suspend reading on this file descriptor until a connection processing
2046 * thread write data on it. Otherwise the listener thread will repeatedly
2047 * submit the same event on it to the pool.
2050 #ifndef SLAP_LIGHTWEIGHT_DISPATCHER
2051 slapd_clr_write( s, 0);
2055 rc = ldap_pvt_thread_pool_submit( &connection_pool,
2056 connection_read_thread, (void *) s );
2059 Debug( LDAP_DEBUG_ANY,
2060 "connection_write_activiate(%d): submit failed (%d)\n",
2068 int connection_write(ber_socket_t s)
2073 assert( connections != NULL );
2075 ldap_pvt_thread_mutex_lock( MCA_GET_CONN_MUTEX( s ) );
2077 c = connection_get( s );
2079 Debug( LDAP_DEBUG_ANY,
2080 "connection_write(%ld): no connection!\n",
2082 slapd_remove(s, 1, 0);
2083 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX( s ) );
2087 #ifndef SLAP_LIGHTWEIGHT_DISPATCHER
2088 slapd_clr_write( s, 0);
2092 Debug( LDAP_DEBUG_TRACE,
2093 "connection_write(%d): waking output for id=%lu\n",
2094 s, c->c_connid, 0 );
2095 ldap_pvt_thread_cond_signal( &c->c_write_cv );
2097 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
2098 slapd_set_read( s, 1 );
2100 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
2101 slapd_set_write( s, 1 );
2104 /* If there are ops pending because of a writewaiter,
2107 while ((op = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
2108 if ( !c->c_writewaiter ) break;
2109 if ( c->c_n_ops_executing > connection_pool_max/2 ) break;
2111 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
2112 LDAP_STAILQ_NEXT(op, o_next) = NULL;
2114 /* pending operations should not be marked for abandonment */
2115 assert(!op->o_abandon);
2117 c->c_n_ops_pending--;
2118 c->c_n_ops_executing++;
2120 connection_op_activate( op );
2124 connection_return( c );
2126 ldap_pvt_thread_mutex_unlock( MCA_GET_CONN_MUTEX(s) );
2132 connection_fake_init(
2137 conn->c_connid = -1;
2138 conn->c_send_ldap_result = slap_send_ldap_result;
2139 conn->c_send_search_entry = slap_send_search_entry;
2140 conn->c_send_search_reference = slap_send_search_reference;
2141 conn->c_listener = (Listener *)&dummy_list;
2142 conn->c_peer_domain = slap_empty_bv;
2143 conn->c_peer_name = slap_empty_bv;
2145 memset(op, 0, OPERATION_BUFFER_SIZE);
2146 op->o_hdr = (Opheader *)(op+1);
2147 op->o_controls = (void **)(op->o_hdr+1);
2148 /* set memory context */
2149 op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx);
2150 op->o_tmpmfuncs = &slap_sl_mfuncs;
2151 op->o_threadctx = ctx;
2154 op->o_connid = op->o_conn->c_connid;
2155 connection_init_log_prefix( op );
2157 slap_op_time( &op->o_time, &op->o_tincr );
2161 connection_assign_nextid( Connection *conn )
2163 ldap_pvt_thread_mutex_lock( &conn_nextid_mutex );
2164 conn->c_connid = conn_nextid++;
2165 ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );