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>
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;
421 c->c_listener_url = NULL;
422 c->c_peer_domain = NULL;
423 c->c_peer_name = NULL;
424 c->c_sock_name = NULL;
427 c->c_pending_ops = NULL;
429 c->c_sasl_bind_mech = NULL;
430 c->c_sasl_context = NULL;
431 c->c_sasl_extra = NULL;
433 c->c_sb = ber_sockbuf_alloc( );
436 ber_len_t max = sockbuf_max_incoming;
437 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
440 c->c_currentber = NULL;
442 /* should check status of thread calls */
443 ldap_pvt_thread_mutex_init( &c->c_mutex );
444 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
445 ldap_pvt_thread_cond_init( &c->c_write_cv );
447 c->c_struct_state = SLAP_C_UNUSED;
450 ldap_pvt_thread_mutex_lock( &c->c_mutex );
452 assert( c->c_struct_state == SLAP_C_UNUSED );
453 assert( c->c_authmech == NULL );
454 assert( c->c_dn == NULL );
455 assert( c->c_ndn == NULL );
456 assert( c->c_cdn == NULL );
457 assert( c->c_groups == NULL );
458 assert( c->c_listener_url == NULL );
459 assert( c->c_peer_domain == NULL );
460 assert( c->c_peer_name == NULL );
461 assert( c->c_sock_name == NULL );
462 assert( c->c_ops == NULL );
463 assert( c->c_pending_ops == NULL );
464 assert( c->c_sasl_bind_mech == NULL );
465 assert( c->c_sasl_context == NULL );
466 assert( c->c_sasl_extra == NULL );
467 assert( c->c_currentber == NULL );
469 c->c_listener_url = ch_strdup( url );
470 c->c_peer_domain = ch_strdup( dnsname );
471 c->c_peer_name = ch_strdup( peername );
472 c->c_sock_name = ch_strdup( sockname );
474 c->c_n_ops_received = 0;
475 c->c_n_ops_executing = 0;
476 c->c_n_ops_pending = 0;
477 c->c_n_ops_completed = 0;
483 /* set to zero until bind, implies LDAP_VERSION3 */
487 c->c_activitytime = c->c_starttime = slap_get_time();
489 if( global_idletimeout > 0 ) {
490 c->c_activitytime = c->c_starttime = slap_get_time();
494 #ifdef LDAP_CONNECTIONLESS
496 if (tls_udp_option == 2)
500 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
501 LBER_SBIOD_LEVEL_PROVIDER, (void*)"udp_" );
503 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_udp,
504 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
509 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
510 LBER_SBIOD_LEVEL_PROVIDER, (void*)"tcp_" );
512 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_tcp,
513 LBER_SBIOD_LEVEL_PROVIDER, (void *)&s );
515 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_readahead,
516 LBER_SBIOD_LEVEL_PROVIDER, NULL );
519 ber_sockbuf_add_io( c->c_sb, &ber_sockbuf_io_debug,
520 INT_MAX, (void*)"ldap_" );
523 if( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_NONBLOCK,
524 c /* non-NULL */ ) < 0 )
527 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
528 "connection_init: conn %d set nonblocking failed\n",
531 Debug( LDAP_DEBUG_ANY,
532 "connection_init(%d, %s): set nonblocking failed\n",
533 s, c->c_peer_name, 0 );
537 id = c->c_connid = conn_nextid++;
539 c->c_conn_state = SLAP_C_INACTIVE;
540 c->c_struct_state = SLAP_C_USED;
542 c->c_ssf = c->c_transport_ssf = ssf;
546 if ( tls_udp_option == 1 ) {
548 c->c_needs_tls_accept = 1;
551 c->c_needs_tls_accept = 0;
556 slap_sasl_external( c, ssf, authid );
558 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
559 ldap_pvt_thread_mutex_unlock( &connections_mutex );
561 backend_connection_init(c);
566 void connection2anonymous( Connection *c )
568 assert( connections != NULL );
572 ber_len_t max = sockbuf_max_incoming;
573 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
576 if(c->c_authmech != NULL ) {
578 c->c_authmech = NULL;
581 if(c->c_dn != NULL) {
585 if(c->c_ndn != NULL) {
590 if(c->c_cdn != NULL) {
595 c->c_authc_backend = NULL;
596 c->c_authz_backend = NULL;
599 GroupAssertion *g, *n;
600 for (g = c->c_groups; g; g=n)
611 connection_destroy( Connection *c )
613 /* note: connections_mutex should be locked by caller */
616 assert( connections != NULL );
618 assert( c->c_struct_state != SLAP_C_UNUSED );
619 assert( c->c_conn_state != SLAP_C_INVALID );
620 assert( c->c_ops == NULL );
622 backend_connection_destroy(c);
627 c->c_activitytime = c->c_starttime = 0;
629 connection2anonymous( c );
631 if(c->c_listener_url != NULL) {
632 free(c->c_listener_url);
633 c->c_listener_url = NULL;
636 if(c->c_peer_domain != NULL) {
637 free(c->c_peer_domain);
638 c->c_peer_domain = NULL;
640 if(c->c_peer_name != NULL) {
643 * If peer was a domain socket, unlink. Mind you,
644 * they may be un-named. Should we leave this to
647 if (strncmp(c->c_peer_name, "PATH=", 5) == 0) {
648 char *path = c->c_peer_name + 5;
653 #endif /* LDAP_PF_LOCAL */
655 free(c->c_peer_name);
656 c->c_peer_name = NULL;
658 if(c->c_sock_name != NULL) {
659 free(c->c_sock_name);
660 c->c_sock_name = NULL;
663 c->c_sasl_bind_in_progress = 0;
664 if(c->c_sasl_bind_mech != NULL) {
665 free(c->c_sasl_bind_mech);
666 c->c_sasl_bind_mech = NULL;
669 slap_sasl_close( c );
671 if ( c->c_currentber != NULL ) {
672 ber_free( c->c_currentber, 1 );
673 c->c_currentber = NULL;
676 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
677 if ( sd != AC_SOCKET_INVALID ) {
678 slapd_remove( sd, 0 );
680 Statslog( LDAP_DEBUG_STATS,
681 "conn=%ld fd=%d closed\n",
682 c->c_connid, sd, 0, 0, 0 );
685 ber_sockbuf_free( c->c_sb );
687 c->c_sb = ber_sockbuf_alloc( );
690 ber_len_t max = sockbuf_max_incoming;
691 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_MAX_INCOMING, &max );
694 c->c_conn_state = SLAP_C_INVALID;
695 c->c_struct_state = SLAP_C_UNUSED;
698 int connection_state_closing( Connection *c )
700 /* c_mutex must be locked by caller */
704 assert( c->c_struct_state == SLAP_C_USED );
706 state = c->c_conn_state;
708 assert( state != SLAP_C_INVALID );
710 return state == SLAP_C_CLOSING;
713 static void connection_abandon( Connection *c )
715 /* c_mutex must be locked by caller */
719 for( o = c->c_ops; o != NULL; o = o->o_next ) {
720 ldap_pvt_thread_mutex_lock( &o->o_abandonmutex );
722 ldap_pvt_thread_mutex_unlock( &o->o_abandonmutex );
725 /* remove pending operations */
726 for( o = slap_op_pop( &c->c_pending_ops );
728 o = slap_op_pop( &c->c_pending_ops ) )
734 void connection_closing( Connection *c )
736 assert( connections != NULL );
738 assert( c->c_struct_state == SLAP_C_USED );
739 assert( c->c_conn_state != SLAP_C_INVALID );
741 /* c_mutex must be locked by caller */
743 if( c->c_conn_state != SLAP_C_CLOSING ) {
746 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
748 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
749 "connection_closing: conn %d readying socket %d for close.\n",
752 Debug( LDAP_DEBUG_TRACE,
753 "connection_closing: readying conn=%ld sd=%d for close\n",
754 c->c_connid, sd, 0 );
756 /* update state to closing */
757 c->c_conn_state = SLAP_C_CLOSING;
759 /* don't listen on this port anymore */
760 slapd_clr_read( sd, 1 );
762 /* abandon active operations */
763 connection_abandon( c );
765 /* wake write blocked operations */
766 slapd_clr_write( sd, 1 );
767 ldap_pvt_thread_cond_signal( &c->c_write_cv );
771 static void connection_close( Connection *c )
775 assert( connections != NULL );
777 assert( c->c_struct_state == SLAP_C_USED );
778 assert( c->c_conn_state == SLAP_C_CLOSING );
780 /* note: connections_mutex and c_mutex should be locked by caller */
782 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_GET_FD, &sd );
783 if( c->c_ops != NULL ) {
785 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
786 "connection_close: conn %d deferring sd %d\n",
789 Debug( LDAP_DEBUG_TRACE,
790 "connection_close: deferring conn=%ld sd=%d\n",
791 c->c_connid, sd, 0 );
797 LDAP_LOG(( "connection", LDAP_LEVEL_RESULTS,
798 "connection_close: conn %d sd %d\n",
801 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d\n",
802 c->c_connid, sd, 0 );
804 connection_destroy( c );
807 unsigned long connections_nextid(void)
810 assert( connections != NULL );
812 ldap_pvt_thread_mutex_lock( &connections_mutex );
816 ldap_pvt_thread_mutex_unlock( &connections_mutex );
821 Connection* connection_first( ber_socket_t *index )
823 assert( connections != NULL );
824 assert( index != NULL );
826 ldap_pvt_thread_mutex_lock( &connections_mutex );
830 return connection_next(NULL, index);
833 Connection* connection_next( Connection *c, ber_socket_t *index )
835 assert( connections != NULL );
836 assert( index != NULL );
837 assert( *index <= dtblsize );
840 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
845 for(; *index < dtblsize; (*index)++) {
846 if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
847 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
855 if( connections[*index].c_struct_state == SLAP_C_USED ) {
856 assert( connections[*index].c_conn_state != SLAP_C_INVALID );
857 c = &connections[(*index)++];
861 assert( connections[*index].c_struct_state == SLAP_C_UNUSED );
862 assert( connections[*index].c_conn_state == SLAP_C_INVALID );
866 ldap_pvt_thread_mutex_lock( &c->c_mutex );
872 void connection_done( Connection *c )
874 assert( connections != NULL );
877 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
880 ldap_pvt_thread_mutex_unlock( &connections_mutex );
884 * connection_activity - handle the request operation op on connection
885 * conn. This routine figures out what kind of operation it is and
886 * calls the appropriate stub to handle it.
890 connection_operation( void *arg_v )
893 struct co_arg *arg = arg_v;
894 ber_tag_t tag = arg->co_op->o_tag;
895 Connection *conn = arg->co_conn;
897 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
899 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
901 if( conn->c_sasl_bind_in_progress && tag != LDAP_REQ_BIND ) {
903 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
904 "connection_operation: conn %d SASL bind in progress (tag=%ld).\n",
905 conn->c_connid, (long)tag ));
907 Debug( LDAP_DEBUG_ANY, "connection_operation: "
908 "error: SASL bind in progress (tag=%ld).\n",
911 send_ldap_result( conn, arg->co_op,
912 rc = LDAP_OPERATIONS_ERROR,
913 NULL, "SASL bind in progress", NULL, NULL );
914 goto operations_error;
919 rc = do_bind( conn, arg->co_op );
922 case LDAP_REQ_UNBIND:
923 rc = do_unbind( conn, arg->co_op );
927 rc = do_add( conn, arg->co_op );
930 case LDAP_REQ_DELETE:
931 rc = do_delete( conn, arg->co_op );
934 case LDAP_REQ_MODRDN:
935 rc = do_modrdn( conn, arg->co_op );
938 case LDAP_REQ_MODIFY:
939 rc = do_modify( conn, arg->co_op );
942 case LDAP_REQ_COMPARE:
943 rc = do_compare( conn, arg->co_op );
946 case LDAP_REQ_SEARCH:
947 rc = do_search( conn, arg->co_op );
950 case LDAP_REQ_ABANDON:
951 rc = do_abandon( conn, arg->co_op );
954 case LDAP_REQ_EXTENDED:
955 rc = do_extended( conn, arg->co_op );
960 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
961 "connection_operation: conn %d unknown LDAP request 0x%lx\n",
962 conn->c_connid, tag ));
964 Debug( LDAP_DEBUG_ANY, "unknown LDAP request 0x%lx\n",
967 arg->co_op->o_tag = LBER_ERROR;
968 send_ldap_disconnect( conn, arg->co_op,
969 LDAP_PROTOCOL_ERROR, "unknown LDAP request" );
974 if( rc == SLAPD_DISCONNECT ) tag = LBER_ERROR;
977 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
979 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
981 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
983 conn->c_n_ops_executing--;
984 conn->c_n_ops_completed++;
986 slap_op_remove( &conn->c_ops, arg->co_op );
987 slap_op_free( arg->co_op );
990 free( (char *) arg );
995 case LDAP_REQ_UNBIND:
996 /* c_mutex is locked */
997 connection_closing( conn );
1001 conn->c_sasl_bind_in_progress =
1002 rc == LDAP_SASL_BIND_IN_PROGRESS ? 1 : 0;
1004 if( conn->c_conn_state == SLAP_C_BINDING) {
1005 conn->c_conn_state = SLAP_C_ACTIVE;
1009 connection_resched( conn );
1011 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1016 int connection_read(ber_socket_t s)
1020 assert( connections != NULL );
1022 ldap_pvt_thread_mutex_lock( &connections_mutex );
1024 /* get (locked) connection */
1025 c = connection_get( s );
1029 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1030 "connection_read: sock %ld no connection\n",
1033 Debug( LDAP_DEBUG_ANY,
1034 "connection_read(%ld): no connection!\n",
1039 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1045 if( c->c_conn_state == SLAP_C_CLOSING ) {
1047 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1048 "connection_read: conn %d connection closing, ignoring input\n",
1051 Debug( LDAP_DEBUG_TRACE,
1052 "connection_read(%d): closing, ignoring input for id=%ld\n",
1053 s, c->c_connid, 0 );
1055 connection_return( c );
1056 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1061 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1062 "connection_read: conn %d checking for input.\n", c->c_connid ));
1064 Debug( LDAP_DEBUG_TRACE,
1065 "connection_read(%d): checking for input on id=%ld\n",
1066 s, c->c_connid, 0 );
1070 if ( c->c_is_tls && c->c_needs_tls_accept ) {
1071 rc = ldap_pvt_tls_accept( c->c_sb, NULL );
1073 #if 0 /* required by next #if 0 */
1079 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1080 "connection_read: conn %d TLS accept error, error %d\n",
1083 Debug( LDAP_DEBUG_TRACE,
1084 "connection_read(%d): TLS accept error "
1085 "error=%d id=%ld, closing\n",
1086 s, rc, c->c_connid );
1088 c->c_needs_tls_accept = 0;
1089 /* connections_mutex and c_mutex are locked */
1090 connection_closing( c );
1093 /* Drain input before close, to allow SSL error codes
1094 * to propagate to client. */
1101 rc = select(s+1, &rfd, NULL, NULL, &tv);
1103 ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_DRAIN,
1107 connection_close( c );
1109 } else if ( rc == 0 ) {
1113 c->c_needs_tls_accept = 0;
1115 /* we need to let SASL know */
1116 ssl = (void *)ldap_pvt_tls_sb_ctx( c->c_sb );
1118 c->c_tls_ssf = (slap_ssf_t) ldap_pvt_tls_get_strength( ssl );
1119 if( c->c_tls_ssf > c->c_ssf ) {
1120 c->c_ssf = c->c_tls_ssf;
1123 authid = (char *)ldap_pvt_tls_get_peer( ssl );
1124 slap_sasl_external( c, c->c_tls_ssf, authid );
1126 connection_return( c );
1127 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1132 #ifdef HAVE_CYRUS_SASL
1133 if ( c->c_sasl_layers ) {
1134 c->c_sasl_layers = 0;
1136 rc = ldap_pvt_sasl_install( c->c_sb, c->c_sasl_context );
1138 if( rc != LDAP_SUCCESS ) {
1140 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1141 "connection_read: conn %d SASL install error %d, closing\n",
1144 Debug( LDAP_DEBUG_TRACE,
1145 "connection_read(%d): SASL install error "
1146 "error=%d id=%ld, closing\n",
1147 s, rc, c->c_connid );
1149 /* connections_mutex and c_mutex are locked */
1150 connection_closing( c );
1151 connection_close( c );
1152 connection_return( c );
1153 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1159 #define CONNECTION_INPUT_LOOP 1
1161 #ifdef DATA_READY_LOOP
1162 while( !rc && ber_sockbuf_ctrl( c->c_sb, LBER_SB_DATA_READY, NULL ) )
1163 #elif CONNECTION_INPUT_LOOP
1167 /* How do we do this without getting into a busy loop ? */
1168 rc = connection_input( c );
1173 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1174 "connection_read: conn %d input error %d, closing.\n",
1177 Debug( LDAP_DEBUG_TRACE,
1178 "connection_read(%d): input error=%d id=%ld, closing.\n",
1179 s, rc, c->c_connid );
1181 /* connections_mutex and c_mutex are locked */
1182 connection_closing( c );
1183 connection_close( c );
1184 connection_return( c );
1185 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1189 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
1190 slapd_set_read( s, 1 );
1193 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) ) {
1194 slapd_set_write( s, 1 );
1197 connection_return( c );
1198 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1212 #ifdef LDAP_CONNECTIONLESS
1217 if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
1220 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1221 "connection_input: conn %d ber_alloc failed.\n", conn->c_connid ));
1223 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
1230 #ifdef LDAP_CONNECTIONLESS
1233 char peername[sizeof("IP=255.255.255.255:65336")];
1234 len = ber_int_sb_read(conn->c_sb, &peeraddr,
1235 sizeof(struct sockaddr));
1236 if (len != sizeof(struct sockaddr))
1238 sprintf( peername, "IP=%s:%d",
1239 inet_ntoa( peeraddr.sa_in_addr.sin_addr ),
1240 (unsigned) ntohs( peeraddr.sa_in_addr.sin_port ) );
1241 Statslog( LDAP_DEBUG_STATS,
1242 "conn=%ld UDP request from %s (%s) accepted.\n",
1243 conn->c_connid, peername,
1244 conn->c_sock_name, 0, 0 );
1247 tag = ber_get_next( conn->c_sb, &len, conn->c_currentber );
1248 if ( tag != LDAP_TAG_MESSAGE ) {
1252 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1255 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1256 "connection_input: conn %d ber_get_next failed, errno %d (%s).\n",
1257 conn->c_connid, err, sock_errstr(err) ));
1259 Debug( LDAP_DEBUG_TRACE,
1260 "ber_get_next on fd %d failed errno=%d (%s)\n",
1261 sd, err, sock_errstr(err) );
1263 if ( err != EWOULDBLOCK && err != EAGAIN ) {
1264 /* log, close and send error */
1265 ber_free( conn->c_currentber, 1 );
1266 conn->c_currentber = NULL;
1273 ber = conn->c_currentber;
1274 conn->c_currentber = NULL;
1276 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
1277 /* log, close and send error */
1279 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1280 "connection_input: conn %d ber_get_int returns 0x%lx.\n",
1281 conn->c_connid, tag ));
1283 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
1290 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
1291 /* log, close and send error */
1293 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1294 "connection_input: conn %d ber_peek_tag returns 0x%lx.\n",
1295 conn->c_connid, tag ));
1297 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
1305 #ifdef LDAP_CONNECTIONLESS
1306 if (conn->c_is_udp) {
1307 if (tag == LBER_OCTETSTRING) {
1308 ber_get_stringa( ber, &cdn );
1309 tag = ber_peek_tag(ber, &len);
1311 if (tag != LDAP_REQ_ABANDON && tag != LDAP_REQ_SEARCH) {
1313 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1314 "connection_input: conn %d invalid req for UDP 0x%lx.\n",
1315 conn->c_connid, tag ));
1317 Debug( LDAP_DEBUG_ANY, "invalid req for UDP 0x%lx\n", tag, 0,
1325 if(tag == LDAP_REQ_BIND) {
1326 /* immediately abandon all exiting operations upon BIND */
1327 connection_abandon( conn );
1330 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
1332 #ifdef LDAP_CONNECTIONLESS
1333 op->o_peeraddr = peeraddr;
1336 op->o_protocol = LDAP_VERSION2;
1339 if ( conn->c_conn_state == SLAP_C_BINDING
1340 || conn->c_conn_state == SLAP_C_CLOSING )
1343 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1344 "connection_input: conn %d deferring operation\n",
1347 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
1349 conn->c_n_ops_pending++;
1350 slap_op_add( &conn->c_pending_ops, op );
1353 conn->c_n_ops_executing++;
1354 connection_op_activate( conn, op );
1358 if ( conn->c_struct_state != SLAP_C_USED ) {
1359 /* connection must have got closed underneath us */
1363 assert( conn->c_struct_state == SLAP_C_USED );
1369 connection_resched( Connection *conn )
1373 if( conn->c_conn_state == SLAP_C_CLOSING ) {
1376 ber_sockbuf_ctrl( conn->c_sb, LBER_SB_OPT_GET_FD, &sd );
1378 /* us trylock to avoid possible deadlock */
1379 rc = ldap_pvt_thread_mutex_trylock( &connections_mutex );
1383 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1384 "connection_resched: conn %d reaquiring locks.\n",
1387 Debug( LDAP_DEBUG_TRACE,
1388 "connection_resched: reaquiring locks conn=%ld sd=%d\n",
1389 conn->c_connid, sd, 0 );
1392 * reaquire locks in the right order...
1393 * this may allow another thread to close this connection,
1394 * so recheck state below.
1396 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
1397 ldap_pvt_thread_mutex_lock( &connections_mutex );
1398 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
1401 if( conn->c_conn_state != SLAP_C_CLOSING ) {
1403 LDAP_LOG(( "connection", LDAP_LEVEL_INFO,
1404 "connection_resched: conn %d closed by other thread.\n",
1407 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1408 "closed by other thread conn=%ld sd=%d\n",
1409 conn->c_connid, sd, 0 );
1413 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1414 "connection_resched: conn %d attempting closing.\n",
1417 Debug( LDAP_DEBUG_TRACE, "connection_resched: "
1418 "attempting closing conn=%ld sd=%d\n",
1419 conn->c_connid, sd, 0 );
1421 connection_close( conn );
1424 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1428 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
1429 /* other states need different handling */
1433 for( op = slap_op_pop( &conn->c_pending_ops );
1435 op = slap_op_pop( &conn->c_pending_ops ) )
1437 /* pending operations should not be marked for abandonment */
1438 assert(!op->o_abandon);
1440 conn->c_n_ops_pending--;
1441 conn->c_n_ops_executing++;
1443 connection_op_activate( conn, op );
1445 if ( conn->c_conn_state == SLAP_C_BINDING ) {
1452 static int connection_op_activate( Connection *conn, Operation *op )
1456 ber_tag_t tag = op->o_tag;
1458 if(tag == LDAP_REQ_BIND) {
1459 conn->c_conn_state = SLAP_C_BINDING;
1462 arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
1463 arg->co_conn = conn;
1466 if (!arg->co_op->o_dn) {
1467 arg->co_op->o_authz = conn->c_authz;
1468 arg->co_op->o_dn = ch_strdup( conn->c_dn != NULL ? conn->c_dn : "" );
1469 arg->co_op->o_ndn = ch_strdup( conn->c_ndn != NULL ? conn->c_ndn : "" );
1471 arg->co_op->o_authtype = conn->c_authtype;
1472 arg->co_op->o_authmech = conn->c_authmech != NULL
1473 ? ch_strdup( conn->c_authmech ) : NULL;
1475 if (!arg->co_op->o_protocol) {
1476 arg->co_op->o_protocol = conn->c_protocol
1477 ? conn->c_protocol : LDAP_VERSION3;
1479 arg->co_op->o_connid = conn->c_connid;
1481 slap_op_add( &conn->c_ops, arg->co_op );
1483 status = ldap_pvt_thread_pool_submit( &connection_pool,
1484 connection_operation, (void *) arg );
1486 if ( status != 0 ) {
1488 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1489 "connection_op_activate: conn %d thread pool submit failed.\n",
1492 Debug( LDAP_DEBUG_ANY,
1493 "ldap_pvt_thread_pool_submit failed (%d)\n", status, 0, 0 );
1495 /* should move op to pending list */
1501 int connection_write(ber_socket_t s)
1504 assert( connections != NULL );
1506 ldap_pvt_thread_mutex_lock( &connections_mutex );
1508 c = connection_get( s );
1510 slapd_clr_write( s, 0);
1514 LDAP_LOG(( "connection", LDAP_LEVEL_ERR,
1515 "connection_write: sock %ld no connection!\n",(long)s));
1517 Debug( LDAP_DEBUG_ANY,
1518 "connection_write(%ld): no connection!\n",
1522 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1529 LDAP_LOG(( "connection", LDAP_LEVEL_DETAIL1,
1530 "connection_write conn %d waking output.\n",
1533 Debug( LDAP_DEBUG_TRACE,
1534 "connection_write(%d): waking output for id=%ld\n",
1535 s, c->c_connid, 0 );
1537 ldap_pvt_thread_cond_signal( &c->c_write_cv );
1539 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) )
1540 slapd_set_read( s, 1 );
1541 if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_WRITE, NULL ) )
1542 slapd_set_write( s, 1 );
1543 connection_return( c );
1544 ldap_pvt_thread_mutex_unlock( &connections_mutex );
1550 * Create client side and server side connection structures, connected to
1551 * one another, for the front end to use for searches on arbitrary back ends.
1554 int connection_internal_open( Connection **conn, LDAP **ldp, const char *id )
1557 ber_socket_t fd[2] = {-1,-1};
1563 rc = lutil_pair( fd );
1568 rc = connection_init( fd[1], "INT", "localhost",
1569 "localhost:0", "localhost:00", 0, 256, id );
1575 slapd_add_internal( fd[1] );
1577 /* A search operation, number 0 */
1578 op = slap_op_alloc( NULL, 0, LDAP_REQ_SEARCH, 0);
1579 op->o_ndn = ch_strdup( id );
1580 op->o_protocol = LDAP_VERSION3;
1582 (*conn) = connection_get( fd[1] );
1583 (*conn)->c_ops = op;
1584 (*conn)->c_conn_state = SLAP_C_ACTIVE;
1587 /* Create the client side of the connection */
1588 rc = ldap_open_internal_connection( ldp, &(fd[0]) );
1589 if( rc != LDAP_SUCCESS ) {
1594 /* The connection_get() will have locked the connection's mutex */
1595 ldap_pvt_thread_mutex_unlock( &((*conn)->c_mutex) );
1597 return LDAP_SUCCESS;
1601 void connection_internal_close( Connection *conn )
1603 Operation *op = conn->c_ops;
1605 slap_op_remove( &conn->c_ops, op );
1607 connection_closing( conn );
1608 connection_close( conn );