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 */
26 static ldap_pvt_thread_t listener_tid;
27 static volatile sig_atomic_t slapd_shutdown = 0;
30 ldap_pvt_thread_mutex_t sd_mutex;
35 /* In winsock, accept() returns values higher than dtblsize
36 so don't bother with this optimization */
46 * Add a descriptor to daemon control
48 static void slapd_add(int s) {
49 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
51 assert( !FD_ISSET( s, &slap_daemon.sd_actives ));
52 assert( !FD_ISSET( s, &slap_daemon.sd_readers ));
53 assert( !FD_ISSET( s, &slap_daemon.sd_writers ));
56 if (s >= slap_daemon.sd_nfds) {
57 slap_daemon.sd_nfds = s + 1;
61 FD_SET( s, &slap_daemon.sd_actives );
62 FD_SET( s, &slap_daemon.sd_readers );
64 Debug( LDAP_DEBUG_CONNS, "daemon: added %d%s%s\n", s,
65 FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
66 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
68 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
72 * Remove the descriptor from daemon control
74 void slapd_remove(int s) {
75 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
77 assert( FD_ISSET( s, &slap_daemon.sd_actives ));
79 Debug( LDAP_DEBUG_CONNS, "daemon: removing %d%s%s\n", s,
80 FD_ISSET(s, &slap_daemon.sd_readers) ? "r" : "",
81 FD_ISSET(s, &slap_daemon.sd_writers) ? "w" : "" );
83 FD_CLR( s, &slap_daemon.sd_actives );
84 FD_CLR( s, &slap_daemon.sd_readers );
85 FD_CLR( s, &slap_daemon.sd_writers );
87 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
90 void slapd_clr_write(int s, int wake) {
91 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
93 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
94 FD_CLR( s, &slap_daemon.sd_writers );
96 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
99 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
103 void slapd_set_write(int s, int wake) {
104 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
106 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
107 FD_SET( s, &slap_daemon.sd_writers );
109 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
112 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
116 void slapd_clr_read(int s, int wake) {
117 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
119 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
120 FD_CLR( s, &slap_daemon.sd_readers );
122 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
125 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
129 void slapd_set_read(int s, int wake) {
130 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
132 assert( FD_ISSET( s, &slap_daemon.sd_actives) );
133 FD_SET( s, &slap_daemon.sd_readers );
135 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
138 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
142 static void slapd_close(int s) {
145 Debug( LDAP_DEBUG_CONNS, "daemon: closing %d\n", s, 0, 0 );
154 struct sockaddr_in *addr = ptr;
158 dtblsize = sysconf( _SC_OPEN_MAX );
159 #elif HAVE_GETDTABLESIZE
160 dtblsize = getdtablesize();
162 dtblsize = FD_SETSIZE;
166 if(dtblsize > FD_SETSIZE) {
167 dtblsize = FD_SETSIZE;
169 #endif /* !FD_SETSIZE */
173 WORD vers = MAKEWORD( 2, 0);
176 err = WSAStartup( vers, &wsaData );
182 ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
183 FD_ZERO( &slap_daemon.sd_readers );
184 FD_ZERO( &slap_daemon.sd_writers );
189 if ( (tcps = socket( AF_INET, SOCK_STREAM, 0 )) == -1 ) {
190 Debug( LDAP_DEBUG_ANY,
191 "daemon: socket() failed errno %d (%s)", errno,
192 errno > -1 && errno < sys_nerr ? sys_errlist[errno] :
198 if ( tcps >= dtblsize ) {
199 Debug( LDAP_DEBUG_ANY,
200 "daemon: listener descriptor %d is too great",
207 if ( setsockopt( tcps, SOL_SOCKET, SO_REUSEADDR,
208 (char *) &tmp, sizeof(tmp) ) == -1 )
210 Debug( LDAP_DEBUG_ANY,
211 "slapd(%d): setsockopt() failed errno %d (%s)",
213 errno > -1 && errno < sys_nerr
214 ? sys_errlist[errno] : "unknown" );
219 if ( bind( tcps, (struct sockaddr *) addr, sizeof(*addr) ) == -1 ) {
220 Debug( LDAP_DEBUG_ANY, "daemon: bind(%d) failed errno %d (%s)\n",
222 errno > -1 && errno < sys_nerr
223 ? sys_errlist[errno] : "unknown" );
227 if ( listen( tcps, 5 ) == -1 ) {
228 Debug( LDAP_DEBUG_ANY,
229 "daemon: listen(%d, 5) failed errno %d (%s)\n",
231 errno > -1 && errno < sys_nerr
232 ? sys_errlist[errno] : "unknown" );
239 if( connection_init( 0, NULL, NULL ) ) {
240 Debug( LDAP_DEBUG_ANY,
241 "connection_init(%d) failed.\n",
250 while ( !slapd_shutdown ) {
257 struct sockaddr_in from;
265 FD_ZERO( &writefds );
271 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
273 #ifdef FD_SET_MANUAL_COPY
274 for( s = 0; s < nfds; s++ ) {
275 if(FD_ISSET( &slap_sd_writers, s )) {
276 FD_SET( &writefds, s );
278 if(FD_ISSET( &slap_sd_writers, s )) {
279 FD_SET( &writefds, s );
283 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
284 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
287 FD_SET( tcps, &readfds );
290 nfds = slap_daemon.sd_nfds;
295 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
297 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
298 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
301 tvp = active_threads ? &zero : NULL;
304 Debug( LDAP_DEBUG_CONNS,
305 "daemon: select: tcps=%d active_threads=%d tvp=%s\n",
306 tcps, active_threads,
307 tvp == NULL ? "NULL" : "zero" );
310 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
312 switch(ns = select( nfds, &readfds, &writefds, 0, tvp )) {
313 case -1: /* failure - try again */
314 if( errno != EINTR ) {
315 Debug( LDAP_DEBUG_CONNS,
316 "daemon: select failed (%d): %s\n",
318 errno >= 0 && errno < sys_nerr
319 ? sys_errlist[errno] : "unknown",
327 case 0: /* timeout - let threads run */
328 Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
330 ldap_pvt_thread_yield();
333 default: /* something happened - deal with it */
334 Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
339 if ( FD_ISSET( tcps, &readfds ) ) {
341 int len = sizeof(from);
344 if ( (s = accept( tcps,
345 (struct sockaddr *) &from, &len )) == -1 )
347 Debug( LDAP_DEBUG_ANY,
348 "daemon: accept(%d) failed errno %d (%s)", errno,
349 tcps, errno >= 0 && errno < sys_nerr ?
350 sys_errlist[errno] : "unknown");
354 assert( !FD_ISSET( 0, &slap_daemon.sd_actives) );
355 assert( !FD_ISSET( 0, &slap_daemon.sd_readers) );
356 assert( !FD_ISSET( 0, &slap_daemon.sd_writers) );
359 /* make sure descriptor number isn't too great */
360 if ( s >= dtblsize ) {
361 Debug( LDAP_DEBUG_ANY,
362 "daemon: %d beyond descriptor table size %d\n",
369 Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %d\n",
373 if ( getpeername( s, (struct sockaddr *) &from, &len ) == 0 ) {
374 client_addr = inet_ntoa( from.sin_addr );
376 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
377 hp = gethostbyaddr( (char *)
378 &(from.sin_addr.s_addr),
379 sizeof(from.sin_addr.s_addr), AF_INET );
383 client_name = hp->h_name;
385 /* normalize the domain */
386 for ( p = client_name; *p; p++ ) {
387 *p = TOLOWER( (unsigned char) *p );
403 if(!hosts_ctl("slapd",
404 client_name != NULL ? client_name : STRING_UNKNOWN,
405 client_addr != NULL ? client_addr : STRING_UNKNOWN,
409 Statslog( LDAP_DEBUG_ANY,
410 "fd=%d connection from %s (%s) denied.\n",
412 client_name == NULL ? "unknown" : client_name,
413 client_addr == NULL ? "unknown" : client_addr,
419 #endif /* HAVE_TCPD */
421 if( (id = connection_init(s, client_name, client_addr)) < 0 ) {
422 Debug( LDAP_DEBUG_ANY,
423 "daemon: connection_init(%d, %s, %s) failed.\n",
425 client_name == NULL ? "unknown" : client_name,
426 client_addr == NULL ? "unknown" : client_addr);
431 Statslog( LDAP_DEBUG_STATS,
432 "daemon: conn=%d fd=%d connection from %s (%s) accepted.\n",
434 client_name == NULL ? "unknown" : client_name,
435 client_addr == NULL ? "unknown" : client_addr,
443 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
445 for ( i = 0; i < readfds.fd_count; i++ )
447 Debug( LDAP_DEBUG_CONNS, " %d%s", readfds.fd_array[i], "r" );
449 for ( i = 0; i < writefds.fd_count; i++ )
451 Debug( LDAP_DEBUG_CONNS, " %d%s", writefds.fd_array[i], "w" );
454 for ( i = 0; i < nfds; i++ ) {
457 r = FD_ISSET( i, &readfds );
458 w = FD_ISSET( i, &writefds );
459 if ( i != tcps && (r || w) ) {
460 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
461 r ? "r" : "", w ? "w" : "" );
465 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
468 /* loop through the writers */
470 for ( i = 0; i < writefds.fd_count; i++ ) {
471 if ( writefds.fd_array[i] == tcps ) {
474 Debug( LDAP_DEBUG_CONNS,
475 "daemon: signalling write waiter on %d\n",
476 writefds.fd_array[i], 0, 0 );
477 assert( FD_ISSET( 0, &slap_daemon.sd_actives) );
479 slapd_clr_write( writefds.fd_array[i], 0 );
480 if ( connection_write( writefds.fd_array[i] ) < 0 ) {
481 FD_CLR( writefds.fd_array[i], &readfds );
482 slapd_close( writefds.fd_array[i] );
486 for ( i = 0; i < nfds; i++ ) {
490 if ( FD_ISSET( i, &writefds ) ) {
491 Debug( LDAP_DEBUG_CONNS,
492 "daemon: signaling write waiter on %d\n", i, 0, 0 );
494 assert( FD_ISSET( 0, &slap_daemon.sd_actives) );
496 /* clear the write flag */
497 slapd_clr_write( i, 0 );
499 if( connection_write( i ) < 0 ) {
500 FD_CLR( i, &readfds );
508 for ( i = 0; i < readfds.fd_count; i++ ) {
509 if ( readfds.fd_array[i] == tcps ) {
512 Debug ( LDAP_DEBUG_CONNS,
513 "daemon: read activity on %d\n", readfds.fd_array[i], 0, 0 );
514 assert( FD_ISSET( readfds.fd_array[i], &slap_daemon.sd_actives) );
516 if ( connection_read( readfds.fd_array[i] ) < 0 ) {
521 for ( i = 0; i < nfds; i++ ) {
526 if ( FD_ISSET( i, &readfds ) ) {
527 Debug( LDAP_DEBUG_CONNS,
528 "daemon: read activity on %d\n", i, 0, 0 );
530 assert( FD_ISSET( i, &slap_daemon.sd_actives) );
532 if( connection_read( i ) < 0) {
538 ldap_pvt_thread_yield();
541 if( slapd_shutdown > 0 ) {
542 Debug( LDAP_DEBUG_TRACE,
543 "daemon: shutdown requested and initiated.\n",
546 } else if ( slapd_shutdown < 0 ) {
547 Debug( LDAP_DEBUG_TRACE,
548 "daemon: abnormal condition, shutdown initiated.\n",
551 Debug( LDAP_DEBUG_TRACE,
552 "daemon: no active streams, shutdown initiated.\n",
560 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
561 Debug( LDAP_DEBUG_ANY,
562 "slapd shutdown: waiting for %d threads to terminate\n",
563 active_threads, 0, 0 );
564 while ( active_threads > 0 ) {
565 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
567 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
572 int slapd_daemon( struct sockaddr_in *addr )
576 status = ldap_pvt_thread_create( &listener_tid, 0,
577 slapd_daemon_task, addr );
580 Debug( LDAP_DEBUG_ANY,
581 "listener ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
584 /* wait for the listener thread to complete */
585 ldap_pvt_thread_join( listener_tid, (void *) NULL );
592 slap_set_shutdown( int sig )
595 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
598 (void) SIGNAL( sig, slap_set_shutdown );
602 slap_do_nothing( int sig )
605 (void) SIGNAL( sig, slap_do_nothing );