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 ldap_pvt_thread_mutex_init( &slap_daemon.sd_mutex );
174 FD_ZERO( &slap_daemon.sd_readers );
175 FD_ZERO( &slap_daemon.sd_writers );
180 if ( (tcps = socket( AF_INET, SOCK_STREAM, 0 )) == -1 ) {
181 Debug( LDAP_DEBUG_ANY,
182 "daemon: socket() failed errno %d (%s)", errno,
183 errno > -1 && errno < sys_nerr ? sys_errlist[errno] :
189 if ( tcps >= dtblsize ) {
190 Debug( LDAP_DEBUG_ANY,
191 "daemon: listener descriptor %d is too great",
198 if ( setsockopt( tcps, SOL_SOCKET, SO_REUSEADDR,
199 (char *) &tmp, sizeof(tmp) ) == -1 )
201 Debug( LDAP_DEBUG_ANY,
202 "slapd(%d): setsockopt() failed errno %d (%s)",
204 errno > -1 && errno < sys_nerr
205 ? sys_errlist[errno] : "unknown" );
210 if ( bind( tcps, (struct sockaddr *) addr, sizeof(*addr) ) == -1 ) {
211 Debug( LDAP_DEBUG_ANY, "daemon: bind(%d) failed errno %d (%s)\n",
213 errno > -1 && errno < sys_nerr
214 ? sys_errlist[errno] : "unknown" );
218 if ( listen( tcps, 5 ) == -1 ) {
219 Debug( LDAP_DEBUG_ANY,
220 "daemon: listen(%d, 5) failed errno %d (%s)\n",
222 errno > -1 && errno < sys_nerr
223 ? sys_errlist[errno] : "unknown" );
230 if( connection_init( 0, NULL, NULL ) ) {
231 Debug( LDAP_DEBUG_ANY,
232 "connection_init(%d) failed.\n",
241 while ( !slapd_shutdown ) {
247 struct sockaddr_in from;
255 FD_ZERO( &writefds );
261 ldap_pvt_thread_mutex_lock( &slap_daemon.sd_mutex );
263 #ifdef FD_SET_MANUAL_COPY
264 for( s = 0; s < nfds; s++ ) {
265 if(FD_ISSET( &slap_sd_writers, s )) {
266 FD_SET( &writefds, s );
268 if(FD_ISSET( &slap_sd_writers, s )) {
269 FD_SET( &writefds, s );
273 memcpy( &readfds, &slap_daemon.sd_readers, sizeof(fd_set) );
274 memcpy( &writefds, &slap_daemon.sd_writers, sizeof(fd_set) );
277 FD_SET( tcps, &readfds );
280 nfds = slap_daemon.sd_nfds;
285 ldap_pvt_thread_mutex_unlock( &slap_daemon.sd_mutex );
287 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
288 #if defined( HAVE_YIELDING_SELECT ) || defined( NO_THREADS )
291 tvp = active_threads ? &zero : NULL;
294 Debug( LDAP_DEBUG_CONNS,
295 "daemon: select: tcps=%d active_threads=%d tvp=%s\n",
296 tcps, active_threads,
297 tvp == NULL ? "NULL" : "zero" );
300 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
302 switch(ns = select( nfds, &readfds, &writefds, 0, tvp )) {
303 case -1: /* failure - try again */
304 if( errno != EINTR ) {
305 Debug( LDAP_DEBUG_CONNS,
306 "daemon: select failed (%d): %s\n",
308 errno >= 0 && errno < sys_nerr
309 ? sys_errlist[errno] : "unknown",
317 case 0: /* timeout - let threads run */
318 Debug( LDAP_DEBUG_CONNS, "daemon: select timeout - yielding\n",
320 ldap_pvt_thread_yield();
323 default: /* something happened - deal with it */
324 Debug( LDAP_DEBUG_CONNS, "daemon: activity on %d descriptors\n",
329 if ( FD_ISSET( tcps, &readfds ) ) {
331 int len = sizeof(from);
334 if ( (s = accept( tcps,
335 (struct sockaddr *) &from, &len )) == -1 )
337 Debug( LDAP_DEBUG_ANY,
338 "daemon: accept(%d) failed errno %d (%s)", errno,
339 tcps, errno >= 0 && errno < sys_nerr ?
340 sys_errlist[errno] : "unknown");
344 assert( !FD_ISSET( 0, &slap_daemon.sd_actives) );
345 assert( !FD_ISSET( 0, &slap_daemon.sd_readers) );
346 assert( !FD_ISSET( 0, &slap_daemon.sd_writers) );
349 /* make sure descriptor number isn't too great */
350 if ( s >= dtblsize ) {
351 Debug( LDAP_DEBUG_ANY,
352 "daemon: %d beyond descriptor table size %d\n",
359 Debug( LDAP_DEBUG_CONNS, "daemon: new connection on %d\n",
363 if ( getpeername( s, (struct sockaddr *) &from, &len ) == 0 ) {
364 client_addr = inet_ntoa( from.sin_addr );
366 #if defined(SLAPD_RLOOKUPS) || defined(HAVE_TCPD)
367 hp = gethostbyaddr( (char *)
368 &(from.sin_addr.s_addr),
369 sizeof(from.sin_addr.s_addr), AF_INET );
373 client_name = hp->h_name;
375 /* normalize the domain */
376 for ( p = client_name; *p; p++ ) {
377 *p = TOLOWER( (unsigned char) *p );
393 if(!hosts_ctl("slapd",
394 client_name != NULL ? client_name : STRING_UNKNOWN,
395 client_addr != NULL ? client_addr : STRING_UNKNOWN,
399 Statslog( LDAP_DEBUG_ANY,
400 "fd=%d connection from %s (%s) denied.\n",
402 client_name == NULL ? "unknown" : client_name,
403 client_addr == NULL ? "unknown" : client_addr,
409 #endif /* HAVE_TCPD */
411 if( (id = connection_init(s, client_name, client_addr)) < 0 ) {
412 Debug( LDAP_DEBUG_ANY,
413 "daemon: connection_init(%d, %s, %s) failed.\n",
415 client_name == NULL ? "unknown" : client_name,
416 client_addr == NULL ? "unknown" : client_addr);
421 Statslog( LDAP_DEBUG_STATS,
422 "daemon: conn=%d fd=%d connection from %s (%s) accepted.\n",
424 client_name == NULL ? "unknown" : client_name,
425 client_addr == NULL ? "unknown" : client_addr,
433 Debug( LDAP_DEBUG_CONNS, "daemon: activity on:", 0, 0, 0 );
435 for ( i = 0; i < nfds; i++ ) {
438 r = FD_ISSET( i, &readfds );
439 w = FD_ISSET( i, &writefds );
440 if ( i != tcps && (r || w) ) {
441 Debug( LDAP_DEBUG_CONNS, " %d%s%s", i,
442 r ? "r" : "", w ? "w" : "" );
446 Debug( LDAP_DEBUG_CONNS, "\n", 0, 0, 0 );
449 /* loop through the writers */
450 for ( i = 0; i < nfds; i++ ) {
455 if ( FD_ISSET( i, &writefds ) ) {
456 Debug( LDAP_DEBUG_CONNS,
457 "daemon: signaling write waiter on %d\n", i, 0, 0 );
459 assert( FD_ISSET( 0, &slap_daemon.sd_actives) );
461 /* clear the write flag */
462 slapd_clr_write( i, 0 );
464 if( connection_write( i ) < 0 ) {
465 FD_CLR( i, &readfds );
471 for ( i = 0; i < nfds; i++ ) {
476 if ( FD_ISSET( i, &readfds ) ) {
477 Debug( LDAP_DEBUG_CONNS,
478 "daemon: read activity on %d\n", i, 0, 0 );
480 assert( FD_ISSET( i, &slap_daemon.sd_actives) );
482 if( connection_read( i ) < 0) {
488 ldap_pvt_thread_yield();
491 if( slapd_shutdown > 0 ) {
492 Debug( LDAP_DEBUG_TRACE,
493 "daemon: shutdown requested and initiated.\n",
496 } else if ( slapd_shutdown < 0 ) {
497 Debug( LDAP_DEBUG_TRACE,
498 "daemon: abnormal condition, shutdown initiated.\n",
501 Debug( LDAP_DEBUG_TRACE,
502 "daemon: no active streams, shutdown initiated.\n",
510 ldap_pvt_thread_mutex_lock( &active_threads_mutex );
511 Debug( LDAP_DEBUG_ANY,
512 "slapd shutdown: waiting for %d threads to terminate\n",
513 active_threads, 0, 0 );
514 while ( active_threads > 0 ) {
515 ldap_pvt_thread_cond_wait(&active_threads_cond, &active_threads_mutex);
517 ldap_pvt_thread_mutex_unlock( &active_threads_mutex );
522 int slapd_daemon( struct sockaddr_in *addr )
526 status = ldap_pvt_thread_create( &listener_tid, 0,
527 slapd_daemon_task, addr );
530 Debug( LDAP_DEBUG_ANY,
531 "listener ldap_pvt_thread_create failed (%d)\n", status, 0, 0 );
534 /* wait for the listener thread to complete */
535 ldap_pvt_thread_join( listener_tid, (void *) NULL );
542 slap_set_shutdown( int sig )
545 ldap_pvt_thread_kill( listener_tid, LDAP_SIGUSR1 );
548 (void) SIGNAL( sig, slap_set_shutdown );
552 slap_do_nothing( int sig )
555 (void) SIGNAL( sig, slap_do_nothing );