14 #define EWOULDBLOCK WSAEWOULDBLOCK
17 /* protected by connections_mutex */
18 static ldap_pvt_thread_mutex_t connections_mutex;
19 static Connection *connections = NULL;
20 static int conn_index = -1;
21 static long conn_nextid = 0;
23 /* structure state (protected by connections_mutex) */
24 #define SLAP_C_UNINITIALIZED 0x0 /* MUST BE ZERO (0) */
25 #define SLAP_C_UNUSED 0x1
26 #define SLAP_C_USED 0x2
28 /* connection state (protected by c_mutex ) */
29 #define SLAP_C_INVALID 0x0 /* MUST BE ZERO (0) */
30 #define SLAP_C_INACTIVE 0x1 /* zero threads */
31 #define SLAP_C_ACTIVE 0x2 /* one or more threads */
32 #define SLAP_C_BINDING 0x3 /* binding */
33 #define SLAP_C_CLOSING 0x4 /* closing */
35 void slapd_remove(int s);
36 static Connection* connection_get( int s );
38 static int connection_input( Connection *c );
40 static int connection_op_activate( Connection *conn, Operation *op );
41 static int connection_resched( Connection *conn );
49 * Initialize connection management infrastructure.
51 int connections_init(void)
55 assert( connections == NULL );
57 if( connections != NULL) { /* probably should assert this */
58 Debug( LDAP_DEBUG_ANY, "connections_init: already initialized.\n",
63 /* should check return of every call */
64 ldap_pvt_thread_mutex_init( &connections_mutex );
66 connections = (Connection *) calloc( dtblsize, sizeof(Connection) );
68 if( connections == NULL ) {
69 Debug( LDAP_DEBUG_ANY,
70 "connections_init: allocation (%d*%ld) of connection array failed.\n",
71 dtblsize, (long) sizeof(Connection), 0 );
75 for ( i = 0; i < dtblsize; i++ )
76 memset( &connections[i], 0, sizeof(Connection) );
79 * per entry initialization of the Connection array initialization
80 * will be done by connection_init()
86 static Connection* connection_get( int s )
90 assert( connections != NULL );
97 assert( connections[s].c_struct_state == SLAP_C_USED );
98 assert( connections[s].c_conn_state != SLAP_C_INVALID );
99 assert( connections[s].c_sb.sb_sd != -1 );
106 for(i=0; i<dtblsize; i++) {
107 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
108 assert( connections[i].c_conn_state == SLAP_C_INVALID );
109 assert( connections[i].c_sb.sb_sd == 0 );
113 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
114 assert( connections[i].c_conn_state == SLAP_C_INVALID );
115 assert( connections[i].c_sb.sb_sd == -1 );
119 assert( connections[i].c_struct_state == SLAP_C_USED );
120 assert( connections[i].c_conn_state != SLAP_C_INVALID );
121 assert( connections[i].c_sb.sb_sd != -1 );
123 if( connections[i].c_sb.sb_sd == s ) {
132 /* we do this BEFORE locking to aid in debugging */
133 Debug( LDAP_DEBUG_TRACE,
134 "connection_get(%d): got connid=%ld\n",
137 ldap_pvt_thread_mutex_lock( &c->c_mutex );
142 static void connection_return( Connection *c )
144 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
147 long connection_init(
154 assert( connections != NULL );
162 assert( s < dtblsize );
165 ldap_pvt_thread_mutex_lock( &connections_mutex );
174 for( i=0; i < dtblsize; i++) {
175 if( connections[i].c_struct_state == SLAP_C_UNINITIALIZED ) {
176 assert( connections[i].c_sb.sb_sd == 0 );
181 if( connections[i].c_struct_state == SLAP_C_UNUSED ) {
182 assert( connections[i].c_sb.sb_sd == -1 );
187 assert( connections[i].c_struct_state == SLAP_C_USED );
188 assert( connections[i].c_conn_state != SLAP_C_INVALID );
189 assert( connections[i].c_sb.sb_sd != -1 );
193 ldap_pvt_thread_mutex_unlock( &connections_mutex );
200 assert( c->c_struct_state != SLAP_C_USED );
201 assert( c->c_conn_state == SLAP_C_INVALID );
203 if( c->c_struct_state == SLAP_C_UNINITIALIZED ) {
206 c->c_client_name = NULL;
207 c->c_client_addr = NULL;
209 c->c_pending_ops = NULL;
211 lber_pvt_sb_init( &c->c_sb );
213 /* should check status of thread calls */
214 ldap_pvt_thread_mutex_init( &c->c_mutex );
215 ldap_pvt_thread_mutex_init( &c->c_write_mutex );
216 ldap_pvt_thread_cond_init( &c->c_write_cv );
218 c->c_struct_state = SLAP_C_UNUSED;
221 ldap_pvt_thread_mutex_lock( &c->c_mutex );
223 assert( c->c_struct_state == SLAP_C_UNUSED );
224 assert( c->c_dn == NULL );
225 assert( c->c_cdn == NULL );
226 assert( c->c_client_name == NULL );
227 assert( c->c_client_addr == NULL );
228 assert( c->c_ops == NULL );
229 assert( c->c_pending_ops == NULL );
231 c->c_client_name = ch_strdup( name == NULL ? "" : name );
232 c->c_client_addr = ch_strdup( addr );
234 c->c_n_ops_received = 0;
236 c->c_n_ops_executing = 0;
237 c->c_n_ops_pending = 0;
238 c->c_n_ops_completed = 0;
241 c->c_starttime = slap_get_time();
243 lber_pvt_sb_set_desc( &c->c_sb, s );
244 lber_pvt_sb_set_io( &c->c_sb, &lber_pvt_sb_io_tcp, NULL );
246 if( lber_pvt_sb_set_nonblock( &c->c_sb, 1 ) < 0 ) {
247 Debug( LDAP_DEBUG_ANY,
248 "connection_init(%d, %s, %s): set nonblocking failed\n",
249 s, c->c_client_name, c->c_client_addr);
252 id = c->c_connid = conn_nextid++;
254 c->c_conn_state = SLAP_C_INACTIVE;
255 c->c_struct_state = SLAP_C_USED;
257 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
258 ldap_pvt_thread_mutex_unlock( &connections_mutex );
264 connection_destroy( Connection *c )
266 assert( connections != NULL );
268 assert( c->c_struct_state != SLAP_C_UNUSED );
269 assert( c->c_conn_state != SLAP_C_INVALID );
270 assert( c->c_ops == NULL );
272 c->c_struct_state = SLAP_C_UNUSED;
273 c->c_conn_state = SLAP_C_INVALID;
280 if(c->c_dn != NULL) {
284 if(c->c_cdn != NULL) {
288 if(c->c_client_name != NULL) {
289 free(c->c_client_name);
290 c->c_client_name = NULL;
292 if(c->c_client_addr != NULL) {
293 free(c->c_client_addr);
294 c->c_client_addr = NULL;
297 if ( lber_pvt_sb_in_use(&c->c_sb) ) {
298 int sd = lber_pvt_sb_get_desc(&c->c_sb);
301 lber_pvt_sb_close( &c->c_sb );
303 Statslog( LDAP_DEBUG_STATS,
304 "conn=%d fd=%d closed.\n",
305 c->c_connid, sd, 0, 0, 0 );
308 lber_pvt_sb_destroy( &c->c_sb );
311 void connection_closing( Connection *c )
313 assert( connections != NULL );
315 assert( c->c_struct_state == SLAP_C_USED );
316 assert( c->c_conn_state != SLAP_C_INVALID );
318 if( c->c_conn_state != SLAP_C_CLOSING ) {
319 /* don't listen on this port anymore */
320 slapd_clr_read( c->c_sb.sb_sd, 1 );
321 c->c_conn_state = SLAP_C_CLOSING;
325 static void connection_close( Connection *c )
327 assert( connections != NULL );
329 assert( c->c_struct_state == SLAP_C_USED );
330 assert( c->c_conn_state == SLAP_C_CLOSING );
332 if( c->c_ops != NULL ) {
333 Debug( LDAP_DEBUG_TRACE,
334 "connection_close: deferring conn=%ld sd=%d.\n",
335 c->c_connid, c->c_sb.sb_sd, 0 );
340 Debug( LDAP_DEBUG_TRACE, "connection_close: conn=%ld sd=%d.\n",
341 c->c_connid, c->c_sb.sb_sd, 0 );
343 connection_destroy( c );
346 long connections_nextid(void)
349 assert( connections != NULL );
351 ldap_pvt_thread_mutex_lock( &connections_mutex );
355 ldap_pvt_thread_mutex_unlock( &connections_mutex );
360 Connection* connection_first(void)
362 assert( connections != NULL );
364 ldap_pvt_thread_mutex_lock( &connections_mutex );
366 assert( conn_index == -1 );
369 return connection_next(NULL);
372 Connection* connection_next(Connection *c)
374 assert( connections != NULL );
375 assert( conn_index != -1 );
376 assert( conn_index <= dtblsize );
379 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
384 for(; conn_index < dtblsize; conn_index++) {
385 if( connections[conn_index].c_struct_state == SLAP_C_UNINITIALIZED ) {
386 assert( connections[conn_index].c_conn_state == SLAP_C_INVALID );
394 if( connections[conn_index].c_struct_state == SLAP_C_USED ) {
395 assert( connections[conn_index].c_conn_state != SLAP_C_INVALID );
396 c = &connections[conn_index++];
400 assert( connections[conn_index].c_struct_state == SLAP_C_UNUSED );
401 assert( connections[conn_index].c_conn_state == SLAP_C_INVALID );
405 ldap_pvt_thread_mutex_lock( &c->c_mutex );
411 void connection_done(Connection *c)
413 assert( connections != NULL );
414 assert( conn_index != -1 );
415 assert( conn_index <= dtblsize );
418 ldap_pvt_thread_mutex_unlock( &c->c_mutex );
422 ldap_pvt_thread_mutex_unlock( &connections_mutex );
426 * connection_activity - handle the request operation op on connection
427 * conn. This routine figures out what kind of operation it is and
428 * calls the appropriate stub to handle it.
432 connection_operation( void *arg_v )
434 struct co_arg *arg = arg_v;
435 int tag = arg->co_op->o_tag;
436 Connection *conn = arg->co_conn;
439 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
441 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
446 do_bind( conn, arg->co_op );
450 case LDAP_REQ_UNBIND_30:
452 case LDAP_REQ_UNBIND:
453 do_unbind( conn, arg->co_op );
457 do_add( conn, arg->co_op );
461 case LDAP_REQ_DELETE_30:
463 case LDAP_REQ_DELETE:
464 do_delete( conn, arg->co_op );
467 case LDAP_REQ_MODRDN:
468 do_modrdn( conn, arg->co_op );
471 case LDAP_REQ_MODIFY:
472 do_modify( conn, arg->co_op );
475 case LDAP_REQ_COMPARE:
476 do_compare( conn, arg->co_op );
479 case LDAP_REQ_SEARCH:
480 do_search( conn, arg->co_op );
484 case LDAP_REQ_ABANDON_30:
486 case LDAP_REQ_ABANDON:
487 do_abandon( conn, arg->co_op );
491 Debug( LDAP_DEBUG_ANY, "unknown request 0x%lx\n",
492 arg->co_op->o_tag, 0, 0 );
497 ldap_pvt_thread_mutex_lock( &num_ops_mutex );
499 ldap_pvt_thread_mutex_unlock( &num_ops_mutex );
502 ldap_pvt_thread_mutex_lock( &conn->c_mutex );
505 conn->c_n_ops_completed++;
508 slap_op_remove( &conn->c_ops, arg->co_op );
509 slap_op_free( arg->co_op );
512 free( (char *) arg );
517 case LDAP_REQ_UNBIND_30:
519 case LDAP_REQ_UNBIND:
520 connection_closing( conn );
524 if( conn->c_conn_state == SLAP_C_BINDING) {
525 conn->c_conn_state = SLAP_C_ACTIVE;
529 if( conn->c_conn_state == SLAP_C_CLOSING ) {
530 Debug( LDAP_DEBUG_TRACE,
531 "connection_operation: attempting closing conn=%ld sd=%d.\n",
532 conn->c_connid, conn->c_sb.sb_sd, 0 );
534 connection_close( conn );
537 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
539 if( active_threads < 1 ) {
540 ldap_pvt_thread_cond_signal(&active_threads_cond);
542 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
544 connection_resched( conn );
546 ldap_pvt_thread_mutex_unlock( &conn->c_mutex );
551 int connection_read(int s)
555 assert( connections != NULL );
557 ldap_pvt_thread_mutex_lock( &connections_mutex );
559 c = connection_get( s );
561 Debug( LDAP_DEBUG_ANY,
562 "connection_read(%d): no connection!\n",
564 ldap_pvt_thread_mutex_unlock( &connections_mutex );
568 if( c->c_conn_state == SLAP_C_CLOSING ) {
569 Debug( LDAP_DEBUG_TRACE,
570 "connection_read(%d): closing, ignoring input for id=%ld\n",
573 connection_return( c );
574 ldap_pvt_thread_mutex_unlock( &connections_mutex );
578 Debug( LDAP_DEBUG_TRACE,
579 "connection_read(%d): checking for input on id=%ld\n",
582 #define CONNECTION_INPUT_LOOP 1
584 #ifdef DATA_READY_LOOP
585 while(!rc && lber_pvt_sb_data_ready(&c->c_sb))
586 #elif CONNECTION_INPUT_LOOP
590 rc = connection_input( c );
594 Debug( LDAP_DEBUG_TRACE,
595 "connection_read(%d): input error id=%ld, closing.\n",
598 connection_closing( c );
599 connection_close( c );
602 connection_return( c );
603 ldap_pvt_thread_mutex_unlock( &connections_mutex );
613 unsigned long tag, len;
617 if ( conn->c_currentber == NULL && (conn->c_currentber = ber_alloc())
619 Debug( LDAP_DEBUG_ANY, "ber_alloc failed\n", 0, 0, 0 );
624 if ( (tag = ber_get_next( &conn->c_sb, &len, conn->c_currentber ))
625 != LDAP_TAG_MESSAGE )
627 Debug( LDAP_DEBUG_TRACE,
628 "ber_get_next on fd %d failed errno %d (%s)\n",
629 lber_pvt_sb_get_desc(&conn->c_sb), errno,
630 errno > -1 && errno < sys_nerr ? sys_errlist[errno] : "unknown" );
631 Debug( LDAP_DEBUG_TRACE,
632 "\t*** got %ld of %lu so far\n",
633 (long)(conn->c_currentber->ber_rwptr - conn->c_currentber->ber_buf),
634 conn->c_currentber->ber_len, 0 );
636 if ( errno != EWOULDBLOCK && errno != EAGAIN ) {
637 /* log, close and send error */
638 ber_free( conn->c_currentber, 1 );
639 conn->c_currentber = NULL;
646 ber = conn->c_currentber;
647 conn->c_currentber = NULL;
649 if ( (tag = ber_get_int( ber, &msgid )) != LDAP_TAG_MSGID ) {
650 /* log, close and send error */
651 Debug( LDAP_DEBUG_ANY, "ber_get_int returns 0x%lx\n", tag, 0,
657 if ( (tag = ber_peek_tag( ber, &len )) == LBER_ERROR ) {
658 /* log, close and send error */
659 Debug( LDAP_DEBUG_ANY, "ber_peek_tag returns 0x%lx\n", tag, 0,
667 if ( conn->c_version == 30 ) {
668 (void) ber_skip_tag( ber, &len );
672 op = slap_op_alloc( ber, msgid, tag, conn->c_n_ops_received++ );
674 if ( conn->c_conn_state == SLAP_C_BINDING
675 || conn->c_conn_state == SLAP_C_CLOSING )
677 Debug( LDAP_DEBUG_ANY, "deferring operation\n", 0, 0, 0 );
678 slap_op_add( &conn->c_pending_ops, op );
681 connection_op_activate( conn, op );
685 if ( conn->c_struct_state != SLAP_C_USED ) {
686 /* connection must have got closed underneath us */
690 assert( conn->c_struct_state == SLAP_C_USED );
696 connection_resched( Connection *conn )
700 if( conn->c_conn_state != SLAP_C_ACTIVE ) {
701 /* other states need different handling */
705 for( op = slap_op_pop( &conn->c_pending_ops );
707 op = slap_op_pop( &conn->c_pending_ops ) )
709 connection_op_activate( conn, op );
711 if ( conn->c_conn_state == SLAP_C_BINDING ) {
718 static int connection_op_activate( Connection *conn, Operation *op )
723 unsigned long tag = op->o_tag;
725 if ( conn->c_dn != NULL ) {
726 tmpdn = ch_strdup( conn->c_dn );
731 arg = (struct co_arg *) ch_malloc( sizeof(struct co_arg) );
735 arg->co_op->o_dn = ch_strdup( tmpdn != NULL ? tmpdn : "" );
736 arg->co_op->o_ndn = dn_normalize_case( ch_strdup( arg->co_op->o_dn ) );
738 slap_op_add( &conn->c_ops, arg->co_op );
740 if(tag == LDAP_REQ_BIND) {
741 conn->c_conn_state = SLAP_C_BINDING;
744 if ( tmpdn != NULL ) {
748 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
750 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
752 status = ldap_pvt_thread_create( &arg->co_op->o_tid, 1,
753 connection_operation, (void *) arg );
756 Debug( LDAP_DEBUG_ANY,
757 "ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
759 /* should move op to pending list */
765 int connection_write(int s)
768 assert( connections != NULL );
770 ldap_pvt_thread_mutex_lock( &connections_mutex );
772 c = connection_get( s );
774 Debug( LDAP_DEBUG_ANY,
775 "connection_write(%d): no connection!\n",
777 ldap_pvt_thread_mutex_unlock( &connections_mutex );
781 Debug( LDAP_DEBUG_TRACE,
782 "connection_write(%d): waking output for id=%ld\n",
785 ldap_pvt_thread_cond_signal( &c->c_write_cv );
787 connection_return( c );
788 ldap_pvt_thread_mutex_unlock( &connections_mutex );