3 * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
12 #include <ac/socket.h>
14 #include <ac/signal.h>
15 #include <ac/string.h>
17 #include <ac/unistd.h>
23 /* protected by connections_mutex */
24 static ldap_pvt_thread_mutex_t connections_mutex;
25 static Connection *connections = NULL;
26 static unsigned long conn_nextid = 0;
28 /* structure state (protected by connections_mutex) */
29 #define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */
30 #define SLAP_C_UNUSED 0x01
31 #define SLAP_C_USED 0x02
33 /* connection state (protected by c_mutex ) */
34 #define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */
35 #define SLAP_C_INACTIVE 0x01 /* zero threads */
36 #define SLAP_C_ACTIVE 0x02 /* one or more threads */
37 #define SLAP_C_BINDING 0x03 /* binding */
38 #define SLAP_C_CLOSING 0x04 /* closing */
41 connection_state2str( int state )
44 case SLAP_C_INVALID: return "!";
45 case SLAP_C_INACTIVE: return "|";
46 case SLAP_C_ACTIVE: return "";
47 case SLAP_C_BINDING: return "B";
48 case SLAP_C_CLOSING: return "C";
54 static Connection* connection_get( ber_socket_t s );
56 static int connection_input( Connection *c );
57 static void connection_close( Connection *c );
59 static int connection_op_activate( Connection *conn, Operation *op );
60 static int connection_resched( Connection *conn );
61 static void connection_abandon( Connection *conn );
62 static void connection_destroy( Connection *c );
70 * Initialize connection management infrastructure.
72 int connections_init(void)
74 assert( connections == NULL );
76 if( connections != NULL) {
78 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
79 "connections_init: already initialized.\n" ));
81 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
87 /* should check return of every call */
88 ldap_pvt_thread_mutex_init( &connections_mutex );
90 connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
92 if( connections == NULL ) {
94 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
95 "connections_init: allocation (%d * %ld) of connection array failed\n",
96 dtblsize, (long) sizeof(Connection) ));
98 Debug( LDAP_DEBUG_ANY,
99 "connections_init: allocation (%d*%ld) of connection array failed\n",
100 dtblsize, (long) sizeof(Connection), 0 );
105 assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
106 assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
109 * per entry initialization of the Connection array initialization
110 * will be done by connection_init()
117 * Destroy connection management infrastructure.
119 int connections_destroy(void)
123 /* should check return of every call */
125 if( connections == NULL) {
127 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
128 "connections_destroy: nothing to destroy.\n"));
130 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
136 for ( i = 0; i < dtblsize; i++ ) {
137 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
138 ber_sockbuf_free( connections[i].c_sb );
139 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
140 ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
141 ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
148 ldap_pvt_thread_mutex_destroy( &connections_mutex );
153 * shutdown all connections
155 int connections_shutdown(void)
159 ldap_pvt_thread_mutex_lock( &connections_mutex );
161 for ( i = 0; i < dtblsize; i++ ) {
162 if( connections[i].c_struct_state != SLAP_C_USED ) {
166 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
168 /* connections_mutex and c_mutex are locked */
169 connection_closing( &connections[i] );
170 connection_close( &connections[i] );
172 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
175 ldap_pvt_thread_mutex_unlock( &connections_mutex );
181 * Timeout idle connections.
183 int connections_timeout_idle(time_t now)
189 for( c = connection_first( &connindex );
191 c = connection_next( c, &connindex ) )
193 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
195 connection_closing( c );
196 connection_close( c );
200 connection_done( c );
205 static Connection* connection_get( ber_socket_t s )
207 /* connections_mutex should be locked by caller */
212 LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
213 "connection_get: socket %ld\n", (long)s ));
215 Debug( LDAP_DEBUG_ARGS,
216 "connection_get(%ld)\n",
220 assert( connections != NULL );
222 if(s == AC_SOCKET_INVALID) {
229 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
236 for(i=0; i<dtblsize; i++) {
237 ber_sockbuf_ctrl( connections[i].c_sb,
238 LBER_SB_OPT_GET_FD, &sd );
240 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
241 assert( connections[i].c_conn_state == SLAP_C_INVALID );
242 assert( connections[i].c_sb == 0 );
246 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
247 assert( connections[i].c_conn_state == SLAP_C_INVALID );
248 assert( sd == AC_SOCKET_INVALID );
252 /* state can actually change from used -> unused by resched,
253 * so don't assert details here.
267 ldap_pvt_thread_mutex_lock( &c->c_mutex );
269 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
270 if( c->c_struct_state != SLAP_C_USED ) {
271 /* connection must have been closed due to resched */
273 assert( c->c_conn_state == SLAP_C_INVALID );
274 assert( sd == AC_SOCKET_INVALID );
277 LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
278 "connection_get: connection %d not used\n", s ));
280 Debug( LDAP_DEBUG_TRACE,
281 "connection_get(%d): connection not used\n",
285 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
290 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
291 "connection_get: get for %d got connid %ld\n",s, c->c_connid ));
293 Debug( LDAP_DEBUG_TRACE,
294 "connection_get(%d): got connid=%ld\n",
300 assert( c->c_struct_state == SLAP_C_USED );
301 assert( c->c_conn_state != SLAP_C_INVALID );
302 assert( sd != AC_SOCKET_INVALID );
305 c->c_activitytime = slap_get_time();
307 if( global_idletimeout > 0 ) {
308 c->c_activitytime = slap_get_time();
316 static void connection_return( Connection *c )
318 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
321 long connection_init(
325 const char* peername,
326 const char* sockname,
334 assert( connections != NULL );
336 assert( dnsname != NULL );
337 assert( peername != NULL );
338 assert( sockname != NULL );
341 assert( tls_udp_option != 1 );
344 if( s == AC_SOCKET_INVALID ) {
346 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
347 "connection_init: init of socket %ld invalid.\n", (long)s ));
349 Debug( LDAP_DEBUG_ANY,
350 "connection_init(%ld): invalid.\n",
358 assert( s < dtblsize );
361 ldap_pvt_thread_mutex_lock( &connections_mutex );
372 for( i=0; i < dtblsize; i++) {
375 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
376 assert( connections[i].c_sb == 0 );
381 sd = AC_SOCKET_INVALID;
382 if (connections[i].c_sb != NULL)
383 ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
385 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
386 assert( sd == AC_SOCKET_INVALID );
391 assert( connections[i].c_struct_state == SLAP_C_USED );
392 assert( connections[i].c_conn_state != SLAP_C_INVALID );
393 assert( sd != AC_SOCKET_INVALID );
398 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
399 "connection_init: skt %d connection table full (%d/%d)\n",
402 Debug( LDAP_DEBUG_ANY,
403 "connection_init(%d): connection table full (%d/%d)\n",
406 ldap_pvt_thread_mutex_unlock( &connections_mutex );
414 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
415 c->c_authmech = NULL;
416 c->c_dn.bv_val = NULL;
418 c->c_ndn.bv_val = NULL;
420 c->c_cdn.bv_val = NULL;
424 c->c_listener_url = NULL;
425 c->c_peer_domain = NULL;
426 c->c_peer_name = NULL;
427 c->c_sock_name = NULL;
429 LDAP_STAILQ_INIT(&c->c_ops);
430 LDAP_STAILQ_INIT(&c->c_pending_ops);
432 c->c_sasl_bind_mech = NULL;
433 c->c_sasl_context = NULL;
434 c->c_sasl_extra = NULL;
436 c->c_sb = ber_sockbuf_alloc( );
439 ber_len_t max = sockbuf_max_incoming;
440 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
443 c->c_currentber = NULL;
445 /* should check status of thread calls */
446 ldap_pvt_thread_mutex_init( &c->c_mutex );
447 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
448 ldap_pvt_thread_cond_init( &c->c_write_cv );
450 c->c_struct_state = SLAP_C_UNUSED;
453 ldap_pvt_thread_mutex_lock( &c->c_mutex );
455 assert( c->c_struct_state == SLAP_C_UNUSED );
456 assert( c->c_authmech == NULL );
457 assert( c->c_dn.bv_val == NULL );
458 assert( c->c_ndn.bv_val == NULL );
459 assert( c->c_cdn.bv_val == NULL );
460 assert( c->c_groups == NULL );
461 assert( c->c_listener_url == NULL );
462 assert( c->c_peer_domain == NULL );
463 assert( c->c_peer_name == NULL );
464 assert( c->c_sock_name == NULL );
465 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
466 assert( LDAP_STAILQ_EMPTY(&c->c_pending_ops) );
467 assert( c->c_sasl_bind_mech == NULL );
468 assert( c->c_sasl_context == NULL );
469 assert( c->c_sasl_extra == NULL );
470 assert( c->c_currentber == NULL );
472 c->c_listener_url = ch_strdup( url );
473 c->c_peer_domain = ch_strdup( dnsname );
474 c->c_peer_name = ch_strdup( peername );
475 c->c_sock_name = ch_strdup( sockname );
477 c->c_n_ops_received = 0;
478 c->c_n_ops_executing = 0;
479 c->c_n_ops_pending = 0;
480 c->c_n_ops_completed = 0;
486 /* set to zero until bind, implies LDAP_VERSION3 */
490 c->c_activitytime = c->c_starttime = slap_get_time();
492 if( global_idletimeout > 0 ) {
493 c->c_activitytime = c->c_starttime = slap_get_time();
497 #ifdef LDAP_CONNECTIONLESS
499 if (tls_udp_option == 2)
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 *)&s );
512 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
513 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
515 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
516 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
518 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
519 LBER_SBIOD_LEVEL_PROVIDER, NULL );
522 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
523 INT_MAX, (void*)"ldap_" );
526 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
527 c /* non-NULL */ ) < 0 )
530 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
531 "connection_init: conn %d set nonblocking failed\n",
534 Debug( LDAP_DEBUG_ANY,
535 "connection_init(%d, %s): set nonblocking failed\n",
536 s, c->c_peer_name, 0 );
540 id = c->c_connid = conn_nextid++;
542 c->c_conn_state = SLAP_C_INACTIVE;
543 c->c_struct_state = SLAP_C_USED;
545 c->c_ssf = c->c_transport_ssf = ssf;
549 if ( tls_udp_option == 1 ) {
551 c->c_needs_tls_accept = 1;
554 c->c_needs_tls_accept = 0;
559 slap_sasl_external( c, ssf, authid );
561 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
562 ldap_pvt_thread_mutex_unlock( &connections_mutex );
564 backend_connection_init(c);
569 void connection2anonymous( Connection *c )
571 assert( connections != NULL );
575 ber_len_t max = sockbuf_max_incoming;
576 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
579 if(c->c_authmech != NULL ) {
581 c->c_authmech = NULL;
584 if(c->c_dn.bv_val != NULL) {
585 free(c->c_dn.bv_val);
586 c->c_dn.bv_val = NULL;
589 if(c->c_ndn.bv_val != NULL) {
590 free(c->c_ndn.bv_val);
591 c->c_ndn.bv_val = NULL;
595 if(c->c_cdn.bv_val != NULL) {
596 free(c->c_cdn.bv_val);
597 c->c_cdn.bv_val = NULL;
601 c->c_authc_backend = NULL;
602 c->c_authz_backend = NULL;
605 GroupAssertion *g, *n;
606 for (g = c->c_groups; g; g=n)
617 connection_destroy( Connection *c )
619 /* note: connections_mutex should be locked by caller */
622 assert( connections != NULL );
624 assert( c->c_struct_state != SLAP_C_UNUSED );
625 assert( c->c_conn_state != SLAP_C_INVALID );
626 assert( LDAP_STAILQ_EMPTY(&c->c_ops) );
628 backend_connection_destroy(c);
633 c->c_activitytime = c->c_starttime = 0;
635 connection2anonymous( c );
637 if(c->c_listener_url != NULL) {
638 free(c->c_listener_url);
639 c->c_listener_url = NULL;
642 if(c->c_peer_domain != NULL) {
643 free(c->c_peer_domain);
644 c->c_peer_domain = NULL;
646 if(c->c_peer_name != NULL) {
649 * If peer was a domain socket, unlink. Mind you,
650 * they may be un-named. Should we leave this to
653 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
654 char *path = c->c_peer_name + 5;
659 #endif /* LDAP_PF_LOCAL */
661 free(c->c_peer_name);
662 c->c_peer_name = NULL;
664 if(c->c_sock_name != NULL) {
665 free(c->c_sock_name);
666 c->c_sock_name = NULL;
669 c->c_sasl_bind_in_progress = 0;
670 if(c->c_sasl_bind_mech != NULL) {
671 free(c->c_sasl_bind_mech);
672 c->c_sasl_bind_mech = NULL;
675 slap_sasl_close( c );
677 if ( c->c_currentber != NULL ) {
678 ber_free( c->c_currentber, 1 );
679 c->c_currentber = NULL;
682 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
683 if ( sd != AC_SOCKET_INVALID ) {
684 slapd_remove( sd, 0 );
686 Statslog( LDAP_DEBUG_STATS,
687 "conn=%ld fd=%d closed\n",
688 c->c_connid, sd, 0, 0, 0 );
691 ber_sockbuf_free( c->c_sb );
693 c->c_sb = ber_sockbuf_alloc( );
696 ber_len_t max = sockbuf_max_incoming;
697 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
700 c->c_conn_state = SLAP_C_INVALID;
701 c->c_struct_state = SLAP_C_UNUSED;
704 int connection_state_closing( Connection *c )
706 /* c_mutex must be locked by caller */
710 assert( c->c_struct_state == SLAP_C_USED );
712 state = c->c_conn_state;
714 assert( state != SLAP_C_INVALID );
716 return state == SLAP_C_CLOSING;
719 static void connection_abandon( Connection *c )
721 /* c_mutex must be locked by caller */
725 LDAP_STAILQ_FOREACH(o, &c->c_ops, o_next) {
726 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
728 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
731 /* remove pending operations */
732 while ( (o = LDAP_STAILQ_FIRST( &c->c_pending_ops )) != NULL) {
733 LDAP_STAILQ_REMOVE_HEAD( &c->c_pending_ops, o_next );
734 LDAP_STAILQ_NEXT(o, o_next) = NULL;
739 void connection_closing( Connection *c )
741 assert( connections != NULL );
743 assert( c->c_struct_state == SLAP_C_USED );
744 assert( c->c_conn_state != SLAP_C_INVALID );
746 /* c_mutex must be locked by caller */
748 if( c->c_conn_state != SLAP_C_CLOSING ) {
751 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
753 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
754 "connection_closing: conn %d readying socket %d for close.\n",
757 Debug( LDAP_DEBUG_TRACE,
758 "connection_closing: readying conn=%ld sd=%d for close\n",
759 c->c_connid, sd, 0 );
761 /* update state to closing */
762 c->c_conn_state = SLAP_C_CLOSING;
764 /* don't listen on this port anymore */
765 slapd_clr_read( sd, 1 );
767 /* abandon active operations */
768 connection_abandon( c );
770 /* wake write blocked operations */
771 slapd_clr_write( sd, 1 );
772 ldap_pvt_thread_cond_signal( &c->c_write_cv );
776 static void connection_close( Connection *c )
780 assert( connections != NULL );
782 assert( c->c_struct_state == SLAP_C_USED );
783 assert( c->c_conn_state == SLAP_C_CLOSING );
785 /* note: connections_mutex and c_mutex should be locked by caller */
787 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
788 if( !LDAP_STAILQ_EMPTY(&c->c_ops) ) {
790 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
791 "connection_close: conn %d deferring sd %d\n",
794 Debug( LDAP_DEBUG_TRACE,
795 "connection_close: deferring conn=%ld sd=%d\n",
796 c->c_connid, sd, 0 );
802 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
803 "connection_close: conn %d sd %d\n",
806 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
807 c->c_connid, sd, 0 );
809 connection_destroy( c );
812 unsigned long connections_nextid(void)
815 assert( connections != NULL );
817 ldap_pvt_thread_mutex_lock( &connections_mutex );
821 ldap_pvt_thread_mutex_unlock( &connections_mutex );
826 Connection* connection_first( ber_socket_t *index )
828 assert( connections != NULL );
829 assert( index != NULL );
831 ldap_pvt_thread_mutex_lock( &connections_mutex );
835 return connection_next(NULL, index);
838 Connection* connection_next( Connection *c, ber_socket_t *index )
840 assert( connections != NULL );
841 assert( index != NULL );
842 assert( *index <= dtblsize );
845 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
850 for(; *index < dtblsize; (*index)++) {
851 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
852 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
860 if( connections[*index].c_struct_state == SLAP_C_USED ) {
861 assert( connections[*index].c_conn_state != SLAP_C_INVALID );
862 c = &connections[(*index)++];
866 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
867 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
871 ldap_pvt_thread_mutex_lock( &c->c_mutex );
877 void connection_done( Connection *c )
879 assert( connections != NULL );
882 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
885 ldap_pvt_thread_mutex_unlock( &connections_mutex );
889 * connection_activity - handle the request operation op on connection
890 * conn. This routine figures out what kind of operation it is and
891 * calls the appropriate stub to handle it.
895 connection_operation( void *arg_v )
898 struct co_arg *arg = arg_v;
899 ber_tag_t tag = arg->co_op->o_tag;
900 Connection *conn = arg->co_conn;
902 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
904 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
906 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
908 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
909 "connection_operation: conn %d SASL bind in progress (tag=%ld).\n",
910 conn->c_connid, (long)tag ));
912 Debug( LDAP_DEBUG_ANY, "connection_operation: "
913 "error: SASL bind in progress (tag=%ld).\n",
916 send_ldap_result( conn, arg->co_op,
917 rc = LDAP_OPERATIONS_ERROR,
918 NULL, "SASL bind in progress", NULL, NULL );
919 goto operations_error;
924 rc = do_bind( conn, arg->co_op );
927 case LDAP_REQ_UNBIND:
928 rc = do_unbind( conn, arg->co_op );
932 rc = do_add( conn, arg->co_op );
935 case LDAP_REQ_DELETE:
936 rc = do_delete( conn, arg->co_op );
939 case LDAP_REQ_MODRDN:
940 rc = do_modrdn( conn, arg->co_op );
943 case LDAP_REQ_MODIFY:
944 rc = do_modify( conn, arg->co_op );
947 case LDAP_REQ_COMPARE:
948 rc = do_compare( conn, arg->co_op );
951 case LDAP_REQ_SEARCH:
952 rc = do_search( conn, arg->co_op );
955 case LDAP_REQ_ABANDON:
956 rc = do_abandon( conn, arg->co_op );
959 case LDAP_REQ_EXTENDED:
960 rc = do_extended( conn, arg->co_op );
965 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
966 "connection_operation: conn %d unknown LDAP request 0x%lx\n",
967 conn->c_connid, tag ));
969 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
972 arg->co_op->o_tag = LBER_ERROR;
973 send_ldap_disconnect( conn, arg->co_op,
974 LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
979 if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
982 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
984 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
986 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
988 conn->c_n_ops_executing--;
989 conn->c_n_ops_completed++;
991 LDAP_STAILQ_REMOVE( &conn->c_ops, arg->co_op, slap_op, o_next);
992 LDAP_STAILQ_NEXT(arg->co_op, o_next) = NULL;
993 slap_op_free( arg->co_op );
996 free( (char *) arg );
1001 case LDAP_REQ_UNBIND:
1002 /* c_mutex is locked */
1003 connection_closing( conn );
1007 conn->c_sasl_bind_in_progress =
1008 rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1010 if( conn->c_conn_state == SLAP_C_BINDING) {
1011 conn->c_conn_state = SLAP_C_ACTIVE;
1015 connection_resched( conn );
1017 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1022 int connection_read(ber_socket_t s)
1026 assert( connections != NULL );
1028 ldap_pvt_thread_mutex_lock( &connections_mutex );
1030 /* get (locked) connection */
1031 c = connection_get( s );
1035 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1036 "connection_read: sock %ld no connection\n",
1039 Debug( LDAP_DEBUG_ANY,
1040 "connection_read(%ld): no connection!\n",
1045 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1051 if( c->c_conn_state == SLAP_C_CLOSING ) {
1053 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1054 "connection_read: conn %d connection closing, ignoring input\n",
1057 Debug( LDAP_DEBUG_TRACE,
1058 "connection_read(%d): closing, ignoring input for id=%ld\n",
1059 s, c->c_connid, 0 );
1061 connection_return( c );
1062 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1067 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1068 "connection_read: conn %d checking for input.\n", c->c_connid ));
1070 Debug( LDAP_DEBUG_TRACE,
1071 "connection_read(%d): checking for input on id=%ld\n",
1072 s, c->c_connid, 0 );
1076 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1077 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1079 #if 0 /* required by next #if 0 */
1085 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1086 "connection_read: conn %d TLS accept error, error %d\n",
1089 Debug( LDAP_DEBUG_TRACE,
1090 "connection_read(%d): TLS accept error "
1091 "error=%d id=%ld, closing\n",
1092 s, rc, c->c_connid );
1094 c->c_needs_tls_accept = 0;
1095 /* connections_mutex and c_mutex are locked */
1096 connection_closing( c );
1099 /* Drain input before close, to allow SSL error codes
1100 * to propagate to client. */
1107 rc = select(s+1, &rfd, NULL, NULL, &tv);
1109 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1113 connection_close( c );
1115 } else if ( rc == 0 ) {
1119 c->c_needs_tls_accept = 0;
1121 /* we need to let SASL know */
1122 ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1124 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1125 if( c->c_tls_ssf > c->c_ssf ) {
1126 c->c_ssf = c->c_tls_ssf;
1129 authid = (char *)ldap_pvt_tls_get_peer( ssl );
1130 slap_sasl_external( c, c->c_tls_ssf, authid );
1132 connection_return( c );
1133 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1138 #ifdef HAVE_CYRUS_SASL
1139 if ( c->c_sasl_layers ) {
1140 c->c_sasl_layers = 0;
1142 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_context );
1144 if( rc != LDAP_SUCCESS ) {
1146 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1147 "connection_read: conn %d SASL install error %d, closing\n",
1150 Debug( LDAP_DEBUG_TRACE,
1151 "connection_read(%d): SASL install error "
1152 "error=%d id=%ld, closing\n",
1153 s, rc, c->c_connid );
1155 /* connections_mutex and c_mutex are locked */
1156 connection_closing( c );
1157 connection_close( c );
1158 connection_return( c );
1159 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1165 #define CONNECTION_INPUT_LOOP 1
1167 #ifdef DATA_READY_LOOP
1168 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1169 #elif CONNECTION_INPUT_LOOP
1173 /* How do we do this without getting into a busy loop ? */
1174 rc = connection_input( c );
1179 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1180 "connection_read: conn %d input error %d, closing.\n",
1183 Debug( LDAP_DEBUG_TRACE,
1184 "connection_read(%d): input error=%d id=%ld, closing.\n",
1185 s, rc, c->c_connid );
1187 /* connections_mutex and c_mutex are locked */
1188 connection_closing( c );
1189 connection_close( c );
1190 connection_return( c );
1191 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1195 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1196 slapd_set_read( s, 1 );
1199 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1200 slapd_set_write( s, 1 );
1203 connection_return( c );
1204 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1218 #ifdef LDAP_CONNECTIONLESS
1223 if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1226 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1227 "connection_input: conn %d ber_alloc failed.\n", conn->c_connid ));
1229 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1236 #ifdef LDAP_CONNECTIONLESS
1239 char peername[sizeof("IP=255.255.255.255:65336")];
1240 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1241 sizeof(struct sockaddr));
1242 if (len != sizeof(struct sockaddr))
1244 sprintf( peername, "IP=%s:%d",
1245 inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1246 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1247 Statslog( LDAP_DEBUG_STATS,
1248 "conn=%ld UDP request from %s (%s) accepted.\n",
1249 conn->c_connid, peername,
1250 conn->c_sock_name, 0, 0 );
1253 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1254 if ( tag != LDAP_TAG_MESSAGE ) {
1258 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1261 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1262 "connection_input: conn %d ber_get_next failed, errno %d (%s).\n",
1263 conn->c_connid, err, sock_errstr(err) ));
1265 Debug( LDAP_DEBUG_TRACE,
1266 "ber_get_next on fd %d failed errno=%d (%s)\n",
1267 sd, err, sock_errstr(err) );
1269 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1270 /* log, close and send error */
1271 ber_free( conn->c_currentber, 1 );
1272 conn->c_currentber = NULL;
1279 ber = conn->c_currentber;
1280 conn->c_currentber = NULL;
1282 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1283 /* log, close and send error */
1285 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1286 "connection_input: conn %d ber_get_int returns 0x%lx.\n",
1287 conn->c_connid, tag ));
1289 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1296 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1297 /* log, close and send error */
1299 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1300 "connection_input: conn %d ber_peek_tag returns 0x%lx.\n",
1301 conn->c_connid, tag ));
1303 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1311 #ifdef LDAP_CONNECTIONLESS
1312 if (conn->c_is_udp) {
1313 if (tag == LBER_OCTETSTRING) {
1314 ber_get_stringa( ber, &cdn );
1315 tag = ber_peek_tag(ber, &len);
1317 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1319 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1320 "connection_input: conn %d invalid req for UDP 0x%lx.\n",
1321 conn->c_connid, tag ));
1323 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1331 if(tag == LDAP_REQ_BIND) {
1332 /* immediately abandon all exiting operations upon BIND */
1333 connection_abandon( conn );
1336 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1338 #ifdef LDAP_CONNECTIONLESS
1339 op->o_peeraddr = peeraddr;
1342 op->o_protocol = LDAP_VERSION2;
1345 if ( conn->c_conn_state == SLAP_C_BINDING
1346 || conn->c_conn_state == SLAP_C_CLOSING )
1349 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1350 "connection_input: conn %d deferring operation\n",
1353 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1355 conn->c_n_ops_pending++;
1356 LDAP_STAILQ_INSERT_TAIL( &conn->c_pending_ops, op, o_next );
1359 conn->c_n_ops_executing++;
1360 connection_op_activate( conn, op );
1364 if ( conn->c_struct_state != SLAP_C_USED ) {
1365 /* connection must have got closed underneath us */
1369 assert( conn->c_struct_state == SLAP_C_USED );
1375 connection_resched( Connection *conn )
1379 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1382 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1384 /* us trylock to avoid possible deadlock */
1385 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1389 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1390 "connection_resched: conn %d reaquiring locks.\n",
1393 Debug( LDAP_DEBUG_TRACE,
1394 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1395 conn->c_connid, sd, 0 );
1398 * reaquire locks in the right order...
1399 * this may allow another thread to close this connection,
1400 * so recheck state below.
1402 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1403 ldap_pvt_thread_mutex_lock( &connections_mutex );
1404 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1407 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1409 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1410 "connection_resched: conn %d closed by other thread.\n",
1413 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1414 "closed by other thread conn=%ld sd=%d\n",
1415 conn->c_connid, sd, 0 );
1419 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1420 "connection_resched: conn %d attempting closing.\n",
1423 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1424 "attempting closing conn=%ld sd=%d\n",
1425 conn->c_connid, sd, 0 );
1427 connection_close( conn );
1430 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1434 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1435 /* other states need different handling */
1439 while ((op = LDAP_STAILQ_FIRST( &conn->c_pending_ops )) != NULL) {
1440 LDAP_STAILQ_REMOVE_HEAD( &conn->c_pending_ops, o_next );
1441 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1442 /* pending operations should not be marked for abandonment */
1443 assert(!op->o_abandon);
1445 conn->c_n_ops_pending--;
1446 conn->c_n_ops_executing++;
1448 connection_op_activate( conn, op );
1450 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1457 static int connection_op_activate( Connection *conn, Operation *op )
1461 ber_tag_t tag = op->o_tag;
1463 if(tag == LDAP_REQ_BIND) {
1464 conn->c_conn_state = SLAP_C_BINDING;
1467 arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1468 arg->co_conn = conn;
1471 if (!arg->co_op->o_dn.bv_len) {
1472 arg->co_op->o_authz = conn->c_authz;
1473 arg->co_op->o_dn.bv_val = ch_strdup( conn->c_dn.bv_val ?
1474 conn->c_dn.bv_val : "" );
1475 arg->co_op->o_ndn.bv_val = ch_strdup( conn->c_ndn.bv_val ?
1476 conn->c_ndn.bv_val : "" );
1478 arg->co_op->o_authtype = conn->c_authtype;
1479 arg->co_op->o_authmech = conn->c_authmech != NULL
1480 ? ch_strdup( conn->c_authmech ) : NULL;
1482 if (!arg->co_op->o_protocol) {
1483 arg->co_op->o_protocol = conn->c_protocol
1484 ? conn->c_protocol : LDAP_VERSION3;
1486 arg->co_op->o_connid = conn->c_connid;
1488 LDAP_STAILQ_INSERT_TAIL( &conn->c_ops, arg->co_op, o_next );
1490 status = ldap_pvt_thread_pool_submit( &connection_pool,
1491 connection_operation, (void *) arg );
1493 if ( status != 0 ) {
1495 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1496 "connection_op_activate: conn %d thread pool submit failed.\n",
1499 Debug( LDAP_DEBUG_ANY,
1500 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1502 /* should move op to pending list */
1508 int connection_write(ber_socket_t s)
1511 assert( connections != NULL );
1513 ldap_pvt_thread_mutex_lock( &connections_mutex );
1515 c = connection_get( s );
1517 slapd_clr_write( s, 0);
1521 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1522 "connection_write: sock %ld no connection!\n",(long)s));
1524 Debug( LDAP_DEBUG_ANY,
1525 "connection_write(%ld): no connection!\n",
1529 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1536 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1537 "connection_write conn %d waking output.\n",
1540 Debug( LDAP_DEBUG_TRACE,
1541 "connection_write(%d): waking output for id=%ld\n",
1542 s, c->c_connid, 0 );
1544 ldap_pvt_thread_cond_signal( &c->c_write_cv );
1546 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1547 slapd_set_read( s, 1 );
1548 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1549 slapd_set_write( s, 1 );
1550 connection_return( c );
1551 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1557 * Create client side and server side connection structures, connected to
1558 * one another, for the front end to use for searches on arbitrary back ends.
1561 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1564 ber_socket_t fd[2] = {-1,-1};
1570 rc = lutil_pair( fd );
1575 rc = connection_init( fd[1], "INT", "localhost",
1576 "localhost:0", "localhost:00", 0, 256, id );
1582 slapd_add_internal( fd[1] );
1584 /* A search operation, number 0 */
1585 op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1586 op->o_ndn.bv_val = ch_strdup( id );
1587 op->o_ndn.bv_len = strlen( id );
1588 op->o_protocol = LDAP_VERSION3;
1590 (*conn) = connection_get( fd[1] );
1591 LDAP_STAILQ_INSERT_HEAD( &(*conn)->c_ops, op, o_next);
1592 (*conn)->c_conn_state = SLAP_C_ACTIVE;
1594 /* Create the client side of the connection */
1595 rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1596 if( rc != LDAP_SUCCESS ) {
1601 /* The connection_get() will have locked the connection's mutex */
1602 ldap_pvt_thread_mutex_unlock( &((*conn)->c_mutex) );
1604 return LDAP_SUCCESS;
1608 void connection_internal_close( Connection *conn )
1610 Operation *op = LDAP_STAILQ_FIRST(&conn->c_ops);
1612 LDAP_STAILQ_REMOVE_HEAD(&conn->c_ops, o_next);
1613 LDAP_STAILQ_NEXT(op, o_next) = NULL;
1615 connection_closing( conn );
1616 connection_close( conn );