11 #include <ac/unistd.h>
13 #include "ldapconfig.h"
19 int allow_severity = LOG_INFO;
20 int deny_severity = LOG_NOTICE;
21 #endif /* TCP Wrappers */
27 /* forward reference */
30 char *WSAGetLastErrorString();
32 #define WAKE_LISTENER \
35 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
40 #define WAKE_LISTENER \
43 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );\
48 static int daemon_initialized = 0;
49 static ldap_pvt_thread_t listener_tid;
50 static volatile sig_atomic_t slapd_shutdown = 0;
51 static volatile sig_atomic_t slapd_listener = 0;
55 ldap_pvt_thread_mutex_t sd_mutex;
60 /* In winsock, accept() returns values higher than dtblsize
61 so don't bother with this optimization */
71 * Add a descriptor to daemon control
73 static void slapd_add(int s) {
74 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
76 assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
77 assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
78 assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
81 if (s >= slap_daemon.sd_nfds) {
82 slap_daemon.sd_nfds = s + 1;
86 FD_SET( (unsigned) s, &slap_daemon.sd_actives );
87 FD_SET( (unsigned) s, &slap_daemon.sd_readers );
89 Debug( LDAP_DEBUG_CONNS, "daemon: added %d%s%s\n", s,
90 FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
91 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
93 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
97 * Remove the descriptor from daemon control
99 void slapd_remove(int s) {
100 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
102 assert( FD_ISSET( s, &slap_daemon.sd_actives ));
104 Debug( LDAP_DEBUG_CONNS, "daemon: removing %d%s%s\n", s,
105 FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
106 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
108 FD_CLR( (unsigned) s, &slap_daemon.sd_actives );
109 FD_CLR( (unsigned) s, &slap_daemon.sd_readers );
110 FD_CLR( (unsigned) s, &slap_daemon.sd_writers );
112 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
115 void slapd_clr_write(int s, int wake) {
116 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
118 assert( FD_ISSET( (unsigned) s, &slap_daemon.sd_actives) );
119 FD_CLR( (unsigned) s, &slap_daemon.sd_writers );
121 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
126 void slapd_set_write(int s, int wake) {
127 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
129 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
130 FD_SET( (unsigned) s, &slap_daemon.sd_writers );
132 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
137 void slapd_clr_read(int s, int wake) {
138 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
140 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
141 FD_CLR( (unsigned) s, &slap_daemon.sd_readers );
143 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
148 void slapd_set_read(int s, int wake) {
149 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
151 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
152 FD_SET( (unsigned) s, &slap_daemon.sd_readers );
154 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
159 static void slapd_close(int s) {
162 Debug( LDAP_DEBUG_CONNS, "daemon: closing %d\n", s, 0, 0 );
167 set_socket( struct sockaddr_in *addr )
170 if ( !daemon_initialized ) sockinit();
173 dtblsize = sysconf( _SC_OPEN_MAX );
174 #elif HAVE_GETDTABLESIZE
175 dtblsize = getdtablesize();
177 dtblsize = FD_SETSIZE;
181 if(dtblsize > FD_SETSIZE) {
182 dtblsize = FD_SETSIZE;
184 #endif /* !FD_SETSIZE */
189 if ( (tcps = socket( AF_INET, SOCK_STREAM, 0 )) == -1 ) {
192 Debug( LDAP_DEBUG_ANY,
193 "daemon: socket() failed errno %d (%s)\n", err,
194 err > -1 && err < sys_nerr ? sys_errlist[err] :
197 Debug( LDAP_DEBUG_ANY,
198 "daemon: socket() failed errno %d (%s)\n",
200 WSAGetLastErrorString(), 0 );
206 if ( tcps >= dtblsize ) {
207 Debug( LDAP_DEBUG_ANY,
208 "daemon: listener descriptor %d is too great\n",
216 if ( setsockopt( tcps, SOL_SOCKET, SO_REUSEADDR,
217 (char *) &tmp, sizeof(tmp) ) == -1 )
220 Debug( LDAP_DEBUG_ANY,
221 "slapd(%d): setsockopt() failed errno %d (%s)\n",
223 err > -1 && err < sys_nerr
224 ? sys_errlist[err] : "unknown" );
229 if ( setsockopt( tcps, SOL_SOCKET, SO_KEEPALIVE,
230 (char *) &tmp, sizeof(tmp) ) == -1 )
233 Debug( LDAP_DEBUG_ANY,
234 "slapd(%d): setsockopt(KEEPALIVE) failed errno %d (%s)\n",
236 err > -1 && err < sys_nerr
237 ? sys_errlist[err] : "unknown" );
242 if ( bind( tcps, (struct sockaddr *) addr, sizeof(*addr) ) == -1 ) {
244 Debug( LDAP_DEBUG_ANY, "daemon: bind(%d) failed errno %d (%s)\n",
246 err > -1 && err < sys_nerr
247 ? sys_errlist[err] : "unknown" );
260 int inetd = ((int *)ptr) [0];
261 int tcps = ((int *)ptr) [1];
264 if ( !daemon_initialized ) sockinit();
268 ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
269 FD_ZERO( &slap_daemon.sd_readers );
270 FD_ZERO( &slap_daemon.sd_writers );
273 if ( listen( tcps, 5 ) == -1 ) {
275 Debug( LDAP_DEBUG_ANY,
276 "daemon: listen(%d, 5) failed errno %d (%s)\n",
278 err > -1 && err < sys_nerr
279 ? sys_errlist[err] : "unknown" );
286 if( connection_init( 0, NULL, NULL ) ) {
287 Debug( LDAP_DEBUG_ANY,
288 "connection_init(%d) failed.\n",
297 while ( !slapd_shutdown ) {
304 struct sockaddr_in from;
305 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
314 FD_ZERO( &writefds );
320 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
322 #ifdef FD_SET_MANUAL_COPY
323 for( s = 0; s < nfds; s++ ) {
324 if(FD_ISSET( &slap_sd_writers, s )) {
325 FD_SET( &writefds, s );
327 if(FD_ISSET( &slap_sd_writers, s )) {
328 FD_SET( &writefds, s );
332 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
333 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
336 FD_SET( (unsigned) tcps, &readfds );
339 nfds = slap_daemon.sd_nfds;
344 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
346 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
347 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
350 tvp = active_threads ? &zero : NULL;
353 Debug( LDAP_DEBUG_CONNS,
354 "daemon: select: tcps=%d active_threads=%d tvp=%s\n",
355 tcps, active_threads,
356 tvp == NULL ? "NULL" : "zero" );
359 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
361 switch(ns = select( nfds, &readfds, &writefds, 0, tvp )) {
362 case -1: { /* failure - try again */
365 Debug( LDAP_DEBUG_CONNS,
366 "daemon: select failed (%d): %s\n",
368 err >= 0 && err < sys_nerr
369 ? sys_errlist[err] : "unknown",
377 case 0: /* timeout - let threads run */
378 Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
380 ldap_pvt_thread_yield();
383 default: /* something happened - deal with it */
384 Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
389 if ( FD_ISSET( tcps, &readfds ) ) {
391 int len = sizeof(from);
394 if ( (s = accept( tcps,
395 (struct sockaddr *) &from, &len )) == -1 )
398 Debug( LDAP_DEBUG_ANY,
399 "daemon: accept(%d) failed errno %d (%s)\n", err,
400 tcps, err >= 0 && err < sys_nerr ?
401 sys_errlist[err] : "unknown");
405 assert( !FD_ISSET( 0, &slap_daemon.sd_actives) );
406 assert( !FD_ISSET( 0, &slap_daemon.sd_readers) );
407 assert( !FD_ISSET( 0, &slap_daemon.sd_writers) );
410 /* make sure descriptor number isn't too great */
411 if ( s >= dtblsize ) {
412 Debug( LDAP_DEBUG_ANY,
413 "daemon: %d beyond descriptor table size %d\n",
420 Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %d\n",
424 if ( getpeername( s, (struct sockaddr *) &from, &len ) == 0 ) {
425 client_addr = inet_ntoa( from.sin_addr );
427 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
428 hp = gethostbyaddr( (char *)
429 &(from.sin_addr.s_addr),
430 sizeof(from.sin_addr.s_addr), AF_INET );
434 client_name = hp->h_name;
436 /* normalize the domain */
437 for ( p = client_name; *p; p++ ) {
438 *p = TOLOWER( (unsigned char) *p );
454 if(!hosts_ctl("slapd",
455 client_name != NULL ? client_name : STRING_UNKNOWN,
456 client_addr != NULL ? client_addr : STRING_UNKNOWN,
460 Statslog( LDAP_DEBUG_ANY,
461 "fd=%d connection from %s (%s) denied.\n",
463 client_name == NULL ? "unknown" : client_name,
464 client_addr == NULL ? "unknown" : client_addr,
470 #endif /* HAVE_TCPD */
473 if( (id = connection_init(s, client_name, client_addr)) < 0 ) {
474 Debug( LDAP_DEBUG_ANY,
475 "daemon: connection_init(%d, %s, %s) failed.\n",
477 client_name == NULL ? "unknown" : client_name,
478 client_addr == NULL ? "unknown" : client_addr);
483 Statslog( LDAP_DEBUG_STATS,
484 "daemon: conn=%d fd=%d connection from %s (%s) accepted.\n",
486 client_name == NULL ? "unknown" : client_name,
487 client_addr == NULL ? "unknown" : client_addr,
495 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
497 for ( i = 0; i < readfds.fd_count; i++ )
499 Debug( LDAP_DEBUG_CONNS, " %d%s", readfds.fd_array[i], "r" );
501 for ( i = 0; i < writefds.fd_count; i++ )
503 Debug( LDAP_DEBUG_CONNS, " %d%s", writefds.fd_array[i], "w" );
506 for ( i = 0; i < nfds; i++ ) {
509 r = FD_ISSET( i, &readfds );
510 w = FD_ISSET( i, &writefds );
511 if ( i != tcps && (r || w) ) {
512 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
513 r ? "r" : "", w ? "w" : "" );
517 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
520 /* loop through the writers */
522 for ( i = 0; i < writefds.fd_count; i++ ) {
523 int wd = writefds.fd_array[i];
529 Debug( LDAP_DEBUG_CONNS,
530 "daemon: signalling write waiter on %d\n",
533 assert( FD_ISSET( wd, &slap_daemon.sd_actives) );
535 slapd_clr_write( wd, 0 );
536 if ( connection_write( wd ) < 0 ) {
537 FD_CLR( (unsigned) wd, &readfds );
542 for ( i = 0; i < nfds; i++ ) {
546 if ( FD_ISSET( i, &writefds ) ) {
547 Debug( LDAP_DEBUG_CONNS,
548 "daemon: signaling write waiter on %d\n", i, 0, 0 );
550 assert( FD_ISSET( i, &slap_daemon.sd_actives) );
552 /* clear the write flag */
553 slapd_clr_write( i, 0 );
555 if( connection_write( i ) < 0 ) {
556 FD_CLR( i, &readfds );
564 for ( i = 0; i < readfds.fd_count; i++ ) {
565 int rd = readfds.fd_array[i];
569 Debug ( LDAP_DEBUG_CONNS,
570 "daemon: read activity on %d\n", rd, 0, 0 );
571 assert( FD_ISSET( rd, &slap_daemon.sd_actives) );
573 if ( connection_read( rd ) < 0 ) {
578 for ( i = 0; i < nfds; i++ ) {
583 if ( FD_ISSET( i, &readfds ) ) {
584 Debug( LDAP_DEBUG_CONNS,
585 "daemon: read activity on %d\n", i, 0, 0 );
587 assert( FD_ISSET( i, &slap_daemon.sd_actives) );
589 if( connection_read( i ) < 0) {
595 ldap_pvt_thread_yield();
598 if( slapd_shutdown > 0 ) {
599 Debug( LDAP_DEBUG_TRACE,
600 "daemon: shutdown requested (%d) and initiated.\n",
601 (int) slapd_shutdown, 0, 0 );
603 } else if ( slapd_shutdown < 0 ) {
604 Debug( LDAP_DEBUG_TRACE,
605 "daemon: abnormal condition (%d), shutdown initiated.\n",
606 (int) slapd_shutdown, 0, 0 );
608 Debug( LDAP_DEBUG_TRACE,
609 "daemon: no active streams, shutdown initiated.\n",
617 /* we only implement "quick" shutdown */
618 connections_shutdown();
620 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
621 Debug( LDAP_DEBUG_ANY,
622 "slapd shutdown: waiting for %d threads to terminate\n",
623 active_threads, 0, 0 );
624 while ( active_threads > 0 ) {
625 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
627 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
633 int slapd_daemon( int inetd, int tcps )
636 int *args = ch_malloc( sizeof( int[2] ) );
640 if ( !daemon_initialized ) sockinit();
644 #define SLAPD_LISTENER_THREAD 1
645 #if defined( SLAPD_LISTENER_THREAD ) || !defined(HAVE_PTHREADS)
647 /* listener as a separate THREAD */
648 rc = ldap_pvt_thread_create( &listener_tid,
649 0, slapd_daemon_task, args );
652 Debug( LDAP_DEBUG_ANY,
653 "listener ldap_pvt_thread_create failed (%d)\n", rc, 0, 0 );
657 /* wait for the listener thread to complete */
658 ldap_pvt_thread_join( listener_tid, (void *) NULL );
660 /* expermimental code */
661 listener_tid = pthread_self();
662 slapd_daemon_task( args );
668 connections_destroy();
680 WORD wVersionRequested;
684 wVersionRequested = MAKEWORD( 2, 0 );
686 err = WSAStartup( wVersionRequested, &wsaData );
688 /* Tell the user that we couldn't find a usable */
693 /* Confirm that the WinSock DLL supports 2.0.*/
694 /* Note that if the DLL supports versions greater */
695 /* than 2.0 in addition to 2.0, it will still return */
696 /* 2.0 in wVersion since that is the version we */
699 if ( LOBYTE( wsaData.wVersion ) != 2 ||
700 HIBYTE( wsaData.wVersion ) != 0 )
702 /* Tell the user that we couldn't find a usable */
707 daemon_initialized = 1;
708 } /* The WinSock DLL is acceptable. Proceed. */
710 void hit_socket( void )
713 extern struct sockaddr_in bind_addr;
715 /* throw something at the socket to terminate the select() in the daemon thread. */
716 if (( s = socket( AF_INET, SOCK_STREAM, 0 )) == INVALID_SOCKET )
717 Debug( LDAP_DEBUG_TRACE, "slap_set_shutdown: socket failed\n\tWSAGetLastError=%d (%s)\n", WSAGetLastError(), WSAGetLastErrorString(), 0 );
718 if ( ioctlsocket( s, FIONBIO, &on ) == -1 )
719 Debug( LDAP_DEBUG_TRACE, "slap_set_shutdown:FIONBIO ioctl on %d faled\n\tWSAGetLastError=%d (%s)\n", s, WSAGetLastError(), WSAGetLastError() );
721 bind_addr.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
722 if ( connect( s, (struct sockaddr *)&bind_addr, sizeof( struct sockaddr_in )) == SOCKET_ERROR ) {
723 /* we can probably expect some error to occur here, mostly WSAEWOULDBLOCK */
729 if ( WSAStartup( 0x0101, &wsaData ) != 0 ) {
732 daemon_initialized = 1;
737 daemon_initialized = 1;
743 slap_set_shutdown( int sig )
745 slapd_shutdown = sig;
748 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
754 (void) SIGNAL( sig, slap_set_shutdown );
758 slap_do_nothing( int sig )
761 (void) SIGNAL( sig, slap_do_nothing );