3 * Copyright 1998-2000 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>
22 /* protected by connections_mutex */
23 static ldap_pvt_thread_mutex_t connections_mutex;
24 static Connection *connections = NULL;
25 static unsigned long conn_nextid = 0;
27 /* structure state (protected by connections_mutex) */
28 #define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */
29 #define SLAP_C_UNUSED 0x01
30 #define SLAP_C_USED 0x02
32 /* connection state (protected by c_mutex ) */
33 #define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */
34 #define SLAP_C_INACTIVE 0x01 /* zero threads */
35 #define SLAP_C_ACTIVE 0x02 /* one or more threads */
36 #define SLAP_C_BINDING 0x03 /* binding */
37 #define SLAP_C_CLOSING 0x04 /* closing */
40 connection_state2str( int state )
43 case SLAP_C_INVALID: return "!";
44 case SLAP_C_INACTIVE: return "|";
45 case SLAP_C_ACTIVE: return "";
46 case SLAP_C_BINDING: return "B";
47 case SLAP_C_CLOSING: return "C";
53 static Connection* connection_get( ber_socket_t s );
55 static int connection_input( Connection *c );
56 static void connection_close( Connection *c );
58 static int connection_op_activate( Connection *conn, Operation *op );
59 static int connection_resched( Connection *conn );
60 static void connection_abandon( Connection *conn );
61 static void connection_destroy( Connection *c );
69 * Initialize connection management infrastructure.
71 int connections_init(void)
73 assert( connections == NULL );
75 if( connections != NULL) {
77 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
78 "connections_init: already initialized.\n" ));
80 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
86 /* should check return of every call */
87 ldap_pvt_thread_mutex_init( &connections_mutex );
89 connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
91 if( connections == NULL ) {
93 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
94 "connections_init: allocation (%d * %ld) of connection array failed\n",
95 dtblsize, (long) sizeof(Connection) ));
97 Debug( LDAP_DEBUG_ANY,
98 "connections_init: allocation (%d*%ld) of connection array failed\n",
99 dtblsize, (long) sizeof(Connection), 0 );
104 assert( connections[0].c_struct_state == SLAP_C_UNINITIALIZED );
105 assert( connections[dtblsize-1].c_struct_state == SLAP_C_UNINITIALIZED );
108 * per entry initialization of the Connection array initialization
109 * will be done by connection_init()
116 * Destroy connection management infrastructure.
118 int connections_destroy(void)
122 /* should check return of every call */
124 if( connections == NULL) {
126 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
127 "connections_destroy: nothing to destroy.\n"));
129 Debug( LDAP_DEBUG_ANY, "connections_destroy: nothing to destroy.\n",
135 for ( i = 0; i < dtblsize; i++ ) {
136 if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
137 ber_sockbuf_free( connections[i].c_sb );
138 ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
139 ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
140 ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
147 ldap_pvt_thread_mutex_destroy( &connections_mutex );
152 * shutdown all connections
154 int connections_shutdown(void)
158 ldap_pvt_thread_mutex_lock( &connections_mutex );
160 for ( i = 0; i < dtblsize; i++ ) {
161 if( connections[i].c_struct_state != SLAP_C_USED ) {
165 ldap_pvt_thread_mutex_lock( &connections[i].c_mutex );
167 /* connections_mutex and c_mutex are locked */
168 connection_closing( &connections[i] );
169 connection_close( &connections[i] );
171 ldap_pvt_thread_mutex_unlock( &connections[i].c_mutex );
174 ldap_pvt_thread_mutex_unlock( &connections_mutex );
180 * Timeout idle connections.
182 int connections_timeout_idle(time_t now)
188 for( c = connection_first( &connindex );
190 c = connection_next( c, &connindex ) )
192 if( difftime( c->c_activitytime+global_idletimeout, now) < 0 ) {
194 connection_closing( c );
195 connection_close( c );
199 connection_done( c );
204 static Connection* connection_get( ber_socket_t s )
206 /* connections_mutex should be locked by caller */
211 LDAP_LOG(( "connection", LDAP_LEVEL_ENTRY,
212 "connection_get: socket %ld\n", (long)s ));
214 Debug( LDAP_DEBUG_ARGS,
215 "connection_get(%ld)\n",
219 assert( connections != NULL );
221 if(s == AC_SOCKET_INVALID) {
228 assert( c->c_struct_state != SLAP_C_UNINITIALIZED );
235 for(i=0; i<dtblsize; i++) {
236 ber_sockbuf_ctrl( connections[i].c_sb,
237 LBER_SB_OPT_GET_FD, &sd );
239 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
240 assert( connections[i].c_conn_state == SLAP_C_INVALID );
241 assert( connections[i].c_sb == 0 );
245 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
246 assert( connections[i].c_conn_state == SLAP_C_INVALID );
247 assert( sd == AC_SOCKET_INVALID );
251 /* state can actually change from used -> unused by resched,
252 * so don't assert details here.
266 ldap_pvt_thread_mutex_lock( &c->c_mutex );
268 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
269 if( c->c_struct_state != SLAP_C_USED ) {
270 /* connection must have been closed due to resched */
272 assert( c->c_conn_state == SLAP_C_INVALID );
273 assert( sd == AC_SOCKET_INVALID );
276 LDAP_LOG(( "connection", LDAP_LEVEL_ARGS,
277 "connection_get: connection %d not used\n", s ));
279 Debug( LDAP_DEBUG_TRACE,
280 "connection_get(%d): connection not used\n",
284 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
289 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
290 "connection_get: get for %d got connid %ld\n",s, c->c_connid ));
292 Debug( LDAP_DEBUG_TRACE,
293 "connection_get(%d): got connid=%ld\n",
299 assert( c->c_struct_state == SLAP_C_USED );
300 assert( c->c_conn_state != SLAP_C_INVALID );
301 assert( sd != AC_SOCKET_INVALID );
303 c->c_activitytime = slap_get_time();
309 static void connection_return( Connection *c )
311 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
314 long connection_init(
318 const char* peername,
319 const char* sockname,
327 assert( connections != NULL );
329 assert( dnsname != NULL );
330 assert( peername != NULL );
331 assert( sockname != NULL );
337 if( s == AC_SOCKET_INVALID ) {
339 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
340 "connection_init: init of socket %ld invalid.\n", (long)s ));
342 Debug( LDAP_DEBUG_ANY,
343 "connection_init(%ld): invalid.\n",
351 assert( s < dtblsize );
354 ldap_pvt_thread_mutex_lock( &connections_mutex );
365 for( i=0; i < dtblsize; i++) {
368 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
369 assert( connections[i].c_sb == 0 );
374 sd = AC_SOCKET_INVALID;
375 if (connections[i].c_sb != NULL)
376 ber_sockbuf_ctrl( connections[i].c_sb, LBER_SB_OPT_GET_FD, &sd );
378 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
379 assert( sd == AC_SOCKET_INVALID );
384 assert( connections[i].c_struct_state == SLAP_C_USED );
385 assert( connections[i].c_conn_state != SLAP_C_INVALID );
386 assert( sd != AC_SOCKET_INVALID );
391 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
392 "connection_init: skt %d connection table full (%d/%d)\n",
395 Debug( LDAP_DEBUG_ANY,
396 "connection_init(%d): connection table full (%d/%d)\n",
399 ldap_pvt_thread_mutex_unlock( &connections_mutex );
407 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
408 c->c_authmech = NULL;
412 c->c_listener_url = NULL;
413 c->c_peer_domain = NULL;
414 c->c_peer_name = NULL;
415 c->c_sock_name = NULL;
418 c->c_pending_ops = NULL;
420 c->c_sasl_bind_mech = NULL;
421 c->c_sasl_context = NULL;
422 c->c_sasl_extra = NULL;
424 c->c_sb = ber_sockbuf_alloc( );
427 ber_len_t max = sockbuf_max_incoming;
428 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
431 c->c_currentber = NULL;
433 /* should check status of thread calls */
434 ldap_pvt_thread_mutex_init( &c->c_mutex );
435 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
436 ldap_pvt_thread_cond_init( &c->c_write_cv );
438 c->c_struct_state = SLAP_C_UNUSED;
441 ldap_pvt_thread_mutex_lock( &c->c_mutex );
443 assert( c->c_struct_state == SLAP_C_UNUSED );
444 assert( c->c_authmech == NULL );
445 assert( c->c_dn == NULL );
446 assert( c->c_cdn == NULL );
447 assert( c->c_listener_url == NULL );
448 assert( c->c_peer_domain == NULL );
449 assert( c->c_peer_name == NULL );
450 assert( c->c_sock_name == NULL );
451 assert( c->c_ops == NULL );
452 assert( c->c_pending_ops == NULL );
453 assert( c->c_sasl_bind_mech == NULL );
454 assert( c->c_sasl_context == NULL );
455 assert( c->c_sasl_extra == NULL );
456 assert( c->c_currentber == NULL );
458 c->c_listener_url = ch_strdup( url );
459 c->c_peer_domain = ch_strdup( dnsname );
460 c->c_peer_name = ch_strdup( peername );
461 c->c_sock_name = ch_strdup( sockname );
463 c->c_n_ops_received = 0;
464 c->c_n_ops_executing = 0;
465 c->c_n_ops_pending = 0;
466 c->c_n_ops_completed = 0;
472 /* set to zero until bind, implies LDAP_VERSION3 */
475 c->c_activitytime = c->c_starttime = slap_get_time();
478 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
479 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
481 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
482 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
483 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
484 LBER_SBIOD_LEVEL_PROVIDER, NULL );
487 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
488 INT_MAX, (void*)"ldap_" );
491 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
492 c /* non-NULL */ ) < 0 )
495 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
496 "connection_init: conn %d set nonblocking failed\n",
499 Debug( LDAP_DEBUG_ANY,
500 "connection_init(%d, %s): set nonblocking failed\n",
501 s, c->c_peer_name, 0 );
505 id = c->c_connid = conn_nextid++;
507 c->c_conn_state = SLAP_C_INACTIVE;
508 c->c_struct_state = SLAP_C_USED;
510 c->c_ssf = c->c_transport_ssf = ssf;
516 c->c_needs_tls_accept = 1;
519 c->c_needs_tls_accept = 0;
524 slap_sasl_external( c, ssf, authid );
526 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
527 ldap_pvt_thread_mutex_unlock( &connections_mutex );
529 backend_connection_init(c);
534 void connection2anonymous( Connection *c )
536 assert( connections != NULL );
539 if(c->c_authmech != NULL ) {
541 c->c_authmech = NULL;
544 if(c->c_dn != NULL) {
549 if(c->c_cdn != NULL) {
554 c->c_authc_backend = NULL;
555 c->c_authz_backend = NULL;
559 connection_destroy( Connection *c )
561 /* note: connections_mutex should be locked by caller */
564 assert( connections != NULL );
566 assert( c->c_struct_state != SLAP_C_UNUSED );
567 assert( c->c_conn_state != SLAP_C_INVALID );
568 assert( c->c_ops == NULL );
570 backend_connection_destroy(c);
575 c->c_activitytime = c->c_starttime = 0;
577 connection2anonymous( c );
579 if(c->c_listener_url != NULL) {
580 free(c->c_listener_url);
581 c->c_listener_url = NULL;
584 if(c->c_peer_domain != NULL) {
585 free(c->c_peer_domain);
586 c->c_peer_domain = NULL;
588 if(c->c_peer_name != NULL) {
591 * If peer was a domain socket, unlink. Mind you,
592 * they may be un-named. Should we leave this to
595 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
596 char *path = c->c_peer_name + 5;
601 #endif /* LDAP_PF_LOCAL */
603 free(c->c_peer_name);
604 c->c_peer_name = NULL;
606 if(c->c_sock_name != NULL) {
607 free(c->c_sock_name);
608 c->c_sock_name = NULL;
611 c->c_sasl_bind_in_progress = 0;
612 if(c->c_sasl_bind_mech != NULL) {
613 free(c->c_sasl_bind_mech);
614 c->c_sasl_bind_mech = NULL;
617 slap_sasl_close( c );
619 if ( c->c_currentber != NULL ) {
620 ber_free( c->c_currentber, 1 );
621 c->c_currentber = NULL;
624 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
625 if ( sd != AC_SOCKET_INVALID ) {
626 slapd_remove( sd, 0 );
628 Statslog( LDAP_DEBUG_STATS,
629 "conn=%ld fd=%d closed\n",
630 c->c_connid, sd, 0, 0, 0 );
633 ber_sockbuf_free( c->c_sb );
635 c->c_sb = ber_sockbuf_alloc( );
638 ber_len_t max = sockbuf_max_incoming;
639 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
642 c->c_conn_state = SLAP_C_INVALID;
643 c->c_struct_state = SLAP_C_UNUSED;
646 int connection_state_closing( Connection *c )
648 /* c_mutex must be locked by caller */
652 assert( c->c_struct_state == SLAP_C_USED );
654 state = c->c_conn_state;
656 assert( state != SLAP_C_INVALID );
658 return state == SLAP_C_CLOSING;
661 static void connection_abandon( Connection *c )
663 /* c_mutex must be locked by caller */
667 for( o = c->c_ops; o != NULL; o = o->o_next ) {
668 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
670 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
673 /* remove pending operations */
674 for( o = slap_op_pop( &c->c_pending_ops );
676 o = slap_op_pop( &c->c_pending_ops ) )
682 void connection_closing( Connection *c )
684 assert( connections != NULL );
686 assert( c->c_struct_state == SLAP_C_USED );
687 assert( c->c_conn_state != SLAP_C_INVALID );
689 /* c_mutex must be locked by caller */
691 if( c->c_conn_state != SLAP_C_CLOSING ) {
694 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
696 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
697 "connection_closing: conn %d readying socket %d for close.\n",
700 Debug( LDAP_DEBUG_TRACE,
701 "connection_closing: readying conn=%ld sd=%d for close\n",
702 c->c_connid, sd, 0 );
704 /* update state to closing */
705 c->c_conn_state = SLAP_C_CLOSING;
707 /* don't listen on this port anymore */
708 slapd_clr_read( sd, 1 );
710 /* abandon active operations */
711 connection_abandon( c );
713 /* wake write blocked operations */
714 slapd_clr_write( sd, 1 );
715 ldap_pvt_thread_cond_signal( &c->c_write_cv );
719 static void connection_close( Connection *c )
723 assert( connections != NULL );
725 assert( c->c_struct_state == SLAP_C_USED );
726 assert( c->c_conn_state == SLAP_C_CLOSING );
728 /* note: connections_mutex and c_mutex should be locked by caller */
730 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
731 if( c->c_ops != NULL ) {
733 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
734 "connection_close: conn %d deferring sd %d\n",
737 Debug( LDAP_DEBUG_TRACE,
738 "connection_close: deferring conn=%ld sd=%d\n",
739 c->c_connid, sd, 0 );
745 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
746 "connection_close: conn %d sd %d\n",
749 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
750 c->c_connid, sd, 0 );
752 connection_destroy( c );
755 unsigned long connections_nextid(void)
758 assert( connections != NULL );
760 ldap_pvt_thread_mutex_lock( &connections_mutex );
764 ldap_pvt_thread_mutex_unlock( &connections_mutex );
769 Connection* connection_first( ber_socket_t *index )
771 assert( connections != NULL );
772 assert( index != NULL );
774 ldap_pvt_thread_mutex_lock( &connections_mutex );
778 return connection_next(NULL, index);
781 Connection* connection_next( Connection *c, ber_socket_t *index )
783 assert( connections != NULL );
784 assert( index != NULL );
785 assert( *index <= dtblsize );
788 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
793 for(; *index < dtblsize; (*index)++) {
794 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
795 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
803 if( connections[*index].c_struct_state == SLAP_C_USED ) {
804 assert( connections[*index].c_conn_state != SLAP_C_INVALID );
805 c = &connections[(*index)++];
809 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
810 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
814 ldap_pvt_thread_mutex_lock( &c->c_mutex );
820 void connection_done( Connection *c )
822 assert( connections != NULL );
825 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
828 ldap_pvt_thread_mutex_unlock( &connections_mutex );
832 * connection_activity - handle the request operation op on connection
833 * conn. This routine figures out what kind of operation it is and
834 * calls the appropriate stub to handle it.
838 connection_operation( void *arg_v )
841 struct co_arg *arg = arg_v;
842 ber_tag_t tag = arg->co_op->o_tag;
843 Connection *conn = arg->co_conn;
845 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
847 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
849 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
851 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
852 "connection_operation: conn %d SASL bind in progress (tag=%ld).\n",
853 conn->c_connid, (long)tag ));
855 Debug( LDAP_DEBUG_ANY, "connection_operation: "
856 "error: SASL bind in progress (tag=%ld).\n",
859 send_ldap_result( conn, arg->co_op,
860 rc = LDAP_OPERATIONS_ERROR,
861 NULL, "SASL bind in progress", NULL, NULL );
862 goto operations_error;
867 rc = do_bind( conn, arg->co_op );
870 case LDAP_REQ_UNBIND:
871 rc = do_unbind( conn, arg->co_op );
875 rc = do_add( conn, arg->co_op );
878 case LDAP_REQ_DELETE:
879 rc = do_delete( conn, arg->co_op );
882 case LDAP_REQ_MODRDN:
883 rc = do_modrdn( conn, arg->co_op );
886 case LDAP_REQ_MODIFY:
887 rc = do_modify( conn, arg->co_op );
890 case LDAP_REQ_COMPARE:
891 rc = do_compare( conn, arg->co_op );
894 case LDAP_REQ_SEARCH:
895 rc = do_search( conn, arg->co_op );
898 case LDAP_REQ_ABANDON:
899 rc = do_abandon( conn, arg->co_op );
902 case LDAP_REQ_EXTENDED:
903 rc = do_extended( conn, arg->co_op );
908 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
909 "connection_operation: conn %d unknown LDAP request 0x%lx\n",
910 conn->c_connid, tag ));
912 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
915 arg->co_op->o_tag = LBER_ERROR;
916 send_ldap_disconnect( conn, arg->co_op,
917 LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
922 if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
925 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
927 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
929 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
931 conn->c_n_ops_executing--;
932 conn->c_n_ops_completed++;
934 slap_op_remove( &conn->c_ops, arg->co_op );
935 slap_op_free( arg->co_op );
938 free( (char *) arg );
943 case LDAP_REQ_UNBIND:
944 /* c_mutex is locked */
945 connection_closing( conn );
949 conn->c_sasl_bind_in_progress =
950 rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
952 if( conn->c_conn_state == SLAP_C_BINDING) {
953 conn->c_conn_state = SLAP_C_ACTIVE;
957 connection_resched( conn );
959 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
964 int connection_read(ber_socket_t s)
968 assert( connections != NULL );
970 ldap_pvt_thread_mutex_lock( &connections_mutex );
972 /* get (locked) connection */
973 c = connection_get( s );
977 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
978 "connection_read: sock %ld no connection\n",
981 Debug( LDAP_DEBUG_ANY,
982 "connection_read(%ld): no connection!\n",
987 ldap_pvt_thread_mutex_unlock( &connections_mutex );
993 if( c->c_conn_state == SLAP_C_CLOSING ) {
995 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
996 "connection_read: conn %d connection closing, ignoring input\n",
999 Debug( LDAP_DEBUG_TRACE,
1000 "connection_read(%d): closing, ignoring input for id=%ld\n",
1001 s, c->c_connid, 0 );
1003 connection_return( c );
1004 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1009 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1010 "connection_read: conn %d checking for input.\n", c->c_connid ));
1012 Debug( LDAP_DEBUG_TRACE,
1013 "connection_read(%d): checking for input on id=%ld\n",
1014 s, c->c_connid, 0 );
1018 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1019 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1025 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1026 "connection_read: conn %d TLS accept error, error %d\n",
1029 Debug( LDAP_DEBUG_TRACE,
1030 "connection_read(%d): TLS accept error "
1031 "error=%d id=%ld, closing\n",
1032 s, rc, c->c_connid );
1034 c->c_needs_tls_accept = 0;
1035 /* connections_mutex and c_mutex are locked */
1036 connection_closing( c );
1039 /* Drain input before close, to allow SSL error codes
1040 * to propagate to client. */
1047 rc = select(s+1, &rfd, NULL, NULL, &tv);
1049 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1053 connection_close( c );
1055 } else if ( rc == 0 ) {
1059 c->c_needs_tls_accept = 0;
1061 /* we need to let SASL know */
1062 ssl = (void *)ldap_pvt_tls_sb_handle( c->c_sb );
1064 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1065 if( c->c_tls_ssf > c->c_ssf ) {
1066 c->c_ssf = c->c_tls_ssf;
1069 authid = (char *)ldap_pvt_tls_get_peer( ssl );
1070 slap_sasl_external( c, c->c_tls_ssf, authid );
1072 connection_return( c );
1073 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1078 #ifdef HAVE_CYRUS_SASL
1079 if ( c->c_sasl_layers ) {
1080 c->c_sasl_layers = 0;
1082 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_context );
1084 if( rc != LDAP_SUCCESS ) {
1086 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1087 "connection_read: conn %d SASL install error %d, closing\n",
1090 Debug( LDAP_DEBUG_TRACE,
1091 "connection_read(%d): SASL install error "
1092 "error=%d id=%ld, closing\n",
1093 s, rc, c->c_connid );
1095 /* connections_mutex and c_mutex are locked */
1096 connection_closing( c );
1097 connection_close( c );
1098 connection_return( c );
1099 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1105 #define CONNECTION_INPUT_LOOP 1
1107 #ifdef DATA_READY_LOOP
1108 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1109 #elif CONNECTION_INPUT_LOOP
1113 /* How do we do this without getting into a busy loop ? */
1114 rc = connection_input( c );
1119 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1120 "connection_read: conn %d input error %d, closing.\n",
1123 Debug( LDAP_DEBUG_TRACE,
1124 "connection_read(%d): input error=%d id=%ld, closing.\n",
1125 s, rc, c->c_connid );
1127 /* connections_mutex and c_mutex are locked */
1128 connection_closing( c );
1129 connection_close( c );
1130 connection_return( c );
1131 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1135 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1136 slapd_set_read( s, 1 );
1139 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1140 slapd_set_write( s, 1 );
1143 connection_return( c );
1144 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1159 if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1162 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1163 "connection_input: conn %d ber_alloc failed.\n", conn->c_connid ));
1165 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1172 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1173 if ( tag != LDAP_TAG_MESSAGE ) {
1177 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1180 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1181 "connection_input: conn %d ber_get_next failed, errno %d (%s).\n",
1182 conn->c_connid, err, sock_errstr(err) ));
1184 Debug( LDAP_DEBUG_TRACE,
1185 "ber_get_next on fd %d failed errno=%d (%s)\n",
1186 sd, err, sock_errstr(err) );
1188 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1189 /* log, close and send error */
1190 ber_free( conn->c_currentber, 1 );
1191 conn->c_currentber = NULL;
1198 ber = conn->c_currentber;
1199 conn->c_currentber = NULL;
1201 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1202 /* log, close and send error */
1204 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1205 "connection_input: conn %d ber_get_int returns 0x%lx.\n",
1206 conn->c_connid, tag ));
1208 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1215 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1216 /* log, close and send error */
1218 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1219 "connection_input: conn %d ber_peek_tag returns 0x%lx.\n",
1220 conn->c_connid, tag ));
1222 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1230 if(tag == LDAP_REQ_BIND) {
1231 /* immediately abandon all exiting operations upon BIND */
1232 connection_abandon( conn );
1235 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1237 if ( conn->c_conn_state == SLAP_C_BINDING
1238 || conn->c_conn_state == SLAP_C_CLOSING )
1241 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1242 "connection_input: conn %d deferring operation\n",
1245 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1247 conn->c_n_ops_pending++;
1248 slap_op_add( &conn->c_pending_ops, op );
1251 conn->c_n_ops_executing++;
1252 connection_op_activate( conn, op );
1256 if ( conn->c_struct_state != SLAP_C_USED ) {
1257 /* connection must have got closed underneath us */
1261 assert( conn->c_struct_state == SLAP_C_USED );
1267 connection_resched( Connection *conn )
1271 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1274 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1276 /* us trylock to avoid possible deadlock */
1277 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1281 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1282 "connection_resched: conn %d reaquiring locks.\n",
1285 Debug( LDAP_DEBUG_TRACE,
1286 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1287 conn->c_connid, sd, 0 );
1290 * reaquire locks in the right order...
1291 * this may allow another thread to close this connection,
1292 * so recheck state below.
1294 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1295 ldap_pvt_thread_mutex_lock( &connections_mutex );
1296 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1299 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1301 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1302 "connection_resched: conn %d closed by other thread.\n",
1305 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1306 "closed by other thread conn=%ld sd=%d\n",
1307 conn->c_connid, sd, 0 );
1311 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1312 "connection_resched: conn %d attempting closing.\n",
1315 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1316 "attempting closing conn=%ld sd=%d\n",
1317 conn->c_connid, sd, 0 );
1319 connection_close( conn );
1322 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1326 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1327 /* other states need different handling */
1331 for( op = slap_op_pop( &conn->c_pending_ops );
1333 op = slap_op_pop( &conn->c_pending_ops ) )
1335 /* pending operations should not be marked for abandonment */
1336 assert(!op->o_abandon);
1338 conn->c_n_ops_pending--;
1339 conn->c_n_ops_executing++;
1341 connection_op_activate( conn, op );
1343 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1350 static int connection_op_activate( Connection *conn, Operation *op )
1354 ber_tag_t tag = op->o_tag;
1356 if(tag == LDAP_REQ_BIND) {
1357 conn->c_conn_state = SLAP_C_BINDING;
1360 arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1361 arg->co_conn = conn;
1364 arg->co_op->o_authz = conn->c_authz;
1365 arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1366 arg->co_op->o_ndn = ch_strdup( arg->co_op->o_dn );
1367 (void) dn_normalize( arg->co_op->o_ndn );
1368 arg->co_op->o_authtype = conn->c_authtype;
1369 arg->co_op->o_authmech = conn->c_authmech != NULL
1370 ? ch_strdup( conn->c_authmech ) : NULL;
1372 arg->co_op->o_protocol = conn->c_protocol
1373 ? conn->c_protocol : LDAP_VERSION3;
1374 arg->co_op->o_connid = conn->c_connid;
1376 slap_op_add( &conn->c_ops, arg->co_op );
1378 status = ldap_pvt_thread_pool_submit( &connection_pool,
1379 connection_operation, (void *) arg );
1381 if ( status != 0 ) {
1383 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1384 "connection_op_activate: conn %d thread pool submit failed.\n",
1387 Debug( LDAP_DEBUG_ANY,
1388 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1390 /* should move op to pending list */
1396 int connection_write(ber_socket_t s)
1399 assert( connections != NULL );
1401 ldap_pvt_thread_mutex_lock( &connections_mutex );
1403 c = connection_get( s );
1405 slapd_clr_write( s, 0);
1409 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1410 "connection_write: sock %ld no connection!\n",(long)s));
1412 Debug( LDAP_DEBUG_ANY,
1413 "connection_write(%ld): no connection!\n",
1417 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1424 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1425 "connection_write conn %d waking output.\n",
1428 Debug( LDAP_DEBUG_TRACE,
1429 "connection_write(%d): waking output for id=%ld\n",
1430 s, c->c_connid, 0 );
1432 ldap_pvt_thread_cond_signal( &c->c_write_cv );
1434 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1435 slapd_set_read( s, 1 );
1436 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1437 slapd_set_write( s, 1 );
1438 connection_return( c );
1439 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1445 * Create client side and server side connection structures, connected to
1446 * one another, for the front end to use for searches on arbitrary back ends.
1449 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1452 ber_socket_t fd[2] = {-1,-1};
1458 rc = lutil_pair( fd );
1463 rc = connection_init( fd[1], "INT", "localhost",
1464 "localhost:0", "localhost:00", 0, 256, id );
1470 slapd_add_internal( fd[1] );
1472 /* A search operation, number 0 */
1473 op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1474 op->o_ndn = ch_strdup( id );
1475 op->o_protocol = LDAP_VERSION3;
1477 (*conn) = connection_get( fd[1] );
1478 (*conn)->c_ops = op;
1479 (*conn)->c_conn_state = SLAP_C_ACTIVE;
1482 /* Create the client side of the connection */
1483 rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1484 if( rc != LDAP_SUCCESS ) {
1489 /* The connection_get() will have locked the connection's mutex */
1490 ldap_pvt_thread_mutex_unlock( &((*conn)->c_mutex) );
1492 return LDAP_SUCCESS;
1496 void connection_internal_close( Connection *conn )
1498 Operation *op = conn->c_ops;
1500 slap_op_remove( &conn->c_ops, op );
1502 connection_closing( conn );
1503 connection_close( conn );