1 /* os-ip.c -- platform-specific TCP & UDP related code */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1998-2010 The OpenLDAP Foundation.
6 * Portions Copyright 1999 Lars Uffmann.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
17 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
18 * All rights reserved.
20 /* Significant additional contributors include:
28 #include <ac/stdlib.h>
31 #include <ac/socket.h>
32 #include <ac/string.h>
34 #include <ac/unistd.h>
38 #endif /* HAVE_IO_H */
45 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
47 int ldap_int_inet4or6 = AF_UNSPEC;
49 int ldap_int_inet4or6 = AF_INET;
55 #define osip_debug(ld,fmt,arg1,arg2,arg3) \
57 ldap_log_printf(NULL, LDAP_DEBUG_TRACE, fmt, arg1, arg2, arg3); \
62 #define osip_debug(ld,fmt,arg1,arg2,arg3) ((void)0)
64 #endif /* LDAP_DEBUG */
67 ldap_pvt_set_errno(int err)
73 ldap_int_timeval_dup( struct timeval **dest, const struct timeval *src )
77 assert( dest != NULL );
84 new = (struct timeval *) LDAP_MALLOC(sizeof(struct timeval));
91 AC_MEMCPY( (char *) new, (const char *) src, sizeof(struct timeval));
98 ldap_pvt_ndelay_on(LDAP *ld, int fd)
100 osip_debug(ld, "ldap_ndelay_on: %d\n",fd,0,0);
101 return ber_pvt_socket_set_nonblock( fd, 1 );
105 ldap_pvt_ndelay_off(LDAP *ld, int fd)
107 osip_debug(ld, "ldap_ndelay_off: %d\n",fd,0,0);
108 return ber_pvt_socket_set_nonblock( fd, 0 );
112 ldap_int_socket(LDAP *ld, int family, int type )
114 ber_socket_t s = socket(family, type, 0);
115 osip_debug(ld, "ldap_new_socket: %d\n",s,0,0);
117 fcntl(s, F_SETFD, FD_CLOEXEC);
123 ldap_pvt_close_socket(LDAP *ld, int s)
125 osip_debug(ld, "ldap_close_socket: %d\n",s,0,0);
130 ldap_int_prepare_socket(LDAP *ld, int s, int proto )
132 osip_debug( ld, "ldap_prepare_socket: %d\n", s, 0, 0 );
134 #if defined( SO_KEEPALIVE ) || defined( TCP_NODELAY )
135 if ( proto == LDAP_PROTO_TCP ) {
138 if ( setsockopt( s, SOL_SOCKET, SO_KEEPALIVE,
139 (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
141 osip_debug( ld, "ldap_prepare_socket: "
142 "setsockopt(%d, SO_KEEPALIVE) failed (ignored).\n",
145 if ( ld->ld_options.ldo_keepalive_idle > 0 )
148 if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPIDLE,
149 (void*) &ld->ld_options.ldo_keepalive_idle,
150 sizeof(ld->ld_options.ldo_keepalive_idle) ) == AC_SOCKET_ERROR )
152 osip_debug( ld, "ldap_prepare_socket: "
153 "setsockopt(%d, TCP_KEEPIDLE) failed (ignored).\n",
157 osip_debug( ld, "ldap_prepare_socket: "
158 "sockopt TCP_KEEPIDLE not supported on this system.\n",
160 #endif /* TCP_KEEPIDLE */
162 if ( ld->ld_options.ldo_keepalive_probes > 0 )
165 if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPCNT,
166 (void*) &ld->ld_options.ldo_keepalive_probes,
167 sizeof(ld->ld_options.ldo_keepalive_probes) ) == AC_SOCKET_ERROR )
169 osip_debug( ld, "ldap_prepare_socket: "
170 "setsockopt(%d, TCP_KEEPCNT) failed (ignored).\n",
174 osip_debug( ld, "ldap_prepare_socket: "
175 "sockopt TCP_KEEPCNT not supported on this system.\n",
177 #endif /* TCP_KEEPCNT */
179 if ( ld->ld_options.ldo_keepalive_interval > 0 )
182 if ( setsockopt( s, IPPROTO_TCP, TCP_KEEPINTVL,
183 (void*) &ld->ld_options.ldo_keepalive_interval,
184 sizeof(ld->ld_options.ldo_keepalive_interval) ) == AC_SOCKET_ERROR )
186 osip_debug( ld, "ldap_prepare_socket: "
187 "setsockopt(%d, TCP_KEEPINTVL) failed (ignored).\n",
191 osip_debug( ld, "ldap_prepare_socket: "
192 "sockopt TCP_KEEPINTVL not supported on this system.\n",
194 #endif /* TCP_KEEPINTVL */
196 #endif /* SO_KEEPALIVE */
198 if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
199 (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
201 osip_debug( ld, "ldap_prepare_socket: "
202 "setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
205 #endif /* TCP_NODELAY */
207 #endif /* SO_KEEPALIVE || TCP_NODELAY */
217 "ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
220 sock_errstr(errno) ); \
224 * check the socket for errors after select returned.
227 ldap_pvt_is_socket_ready(LDAP *ld, int s)
229 osip_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
231 #if defined( notyet ) /* && defined( SO_ERROR ) */
234 ber_socklen_t dummy = sizeof(so_errno);
235 if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
241 ldap_pvt_set_errno(so_errno);
251 struct sockaddr_storage sin;
253 struct sockaddr_in sin;
256 ber_socklen_t dummy = sizeof(sin);
257 if ( getpeername( s, (struct sockaddr *) &sin, &dummy )
260 /* XXX: needs to be replace with ber_stream_read() */
261 (void)read(s, &ch, 1);
272 #endif /* HAVE_WINSOCK */
274 /* NOTE: this is identical to analogous code in os-local.c */
279 struct timeval *tvp )
284 osip_debug(ld, "ldap_int_poll: fd: %d tm: %ld\n",
285 s, tvp ? tvp->tv_sec : -1L, 0);
290 int timeout = INFTIM;
293 fd.events = POLL_WRITE;
296 timeout = TV2MILLISEC( tvp );
300 rc = poll( &fd, 1, timeout );
302 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
303 LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
305 if ( rc == AC_SOCKET_ERROR ) {
309 if ( timeout == 0 && rc == 0 ) {
313 if ( fd.revents & POLL_WRITE ) {
314 if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
318 if ( ldap_pvt_ndelay_off( ld, s ) == -1 ) {
326 fd_set wfds, *z = NULL;
330 struct timeval tv = { 0 };
332 #if defined( FD_SETSIZE ) && !defined( HAVE_WINSOCK )
333 if ( s >= FD_SETSIZE ) {
334 rc = AC_SOCKET_ERROR;
336 ldap_pvt_set_errno( EMFILE );
354 rc = select( ldap_int_tblsize, z, &wfds,
361 } while ( rc == AC_SOCKET_ERROR && errno == EINTR &&
362 LDAP_BOOL_GET( &ld->ld_options, LDAP_BOOL_RESTART ) );
364 if ( rc == AC_SOCKET_ERROR ) {
368 if ( rc == 0 && tvp && tvp->tv_sec == 0 && tvp->tv_usec == 0 ) {
373 /* This means the connection failed */
374 if ( FD_ISSET(s, &efds) ) {
376 ber_socklen_t dummy = sizeof(so_errno);
377 if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
378 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
381 so_errno = WSAGetLastError();
383 ldap_pvt_set_errno( so_errno );
384 osip_debug(ld, "ldap_int_poll: error on socket %d: "
385 "errno: %d (%s)\n", s, errno, sock_errstr( errno ));
389 if ( FD_ISSET(s, &wfds) ) {
391 if ( ldap_pvt_is_socket_ready( ld, s ) == -1 ) {
395 if ( ldap_pvt_ndelay_off(ld, s) == -1 ) {
403 osip_debug(ld, "ldap_int_poll: timed out\n",0,0,0);
404 ldap_pvt_set_errno( ETIMEDOUT );
409 ldap_pvt_connect(LDAP *ld, ber_socket_t s,
410 struct sockaddr *sin, ber_socklen_t addrlen,
414 struct timeval tv, *opt_tv = NULL;
416 #ifdef LDAP_CONNECTIONLESS
417 /* We could do a connect() but that would interfere with
418 * attempts to poll a broadcast address
420 if (LDAP_IS_UDP(ld)) {
421 if (ld->ld_options.ldo_peer)
422 ldap_memfree(ld->ld_options.ldo_peer);
423 ld->ld_options.ldo_peer=ldap_memalloc(sizeof(struct sockaddr));
424 AC_MEMCPY(ld->ld_options.ldo_peer,sin,sizeof(struct sockaddr));
428 if ( ld->ld_options.ldo_tm_net.tv_sec >= 0 ) {
429 tv = ld->ld_options.ldo_tm_net;
433 osip_debug(ld, "ldap_pvt_connect: fd: %d tm: %ld async: %d\n",
434 s, opt_tv ? tv.tv_sec : -1L, async);
436 if ( opt_tv && ldap_pvt_ndelay_on(ld, s) == -1 )
439 if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
440 if ( opt_tv && ldap_pvt_ndelay_off(ld, s) == -1 )
446 if ( err != EINPROGRESS && err != EWOULDBLOCK ) {
451 /* caller will call ldap_int_poll() as appropriate? */
455 rc = ldap_int_poll( ld, s, opt_tv );
457 osip_debug(ld, "ldap_pvt_connect: %d\n", rc, 0, 0);
462 #ifndef HAVE_INET_ATON
464 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
466 unsigned long u = inet_addr( host );
469 if ( u == INADDR_NONE ) return 0;
471 if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
479 ldap_int_connect_cbs(LDAP *ld, Sockbuf *sb, ber_socket_t *s, LDAPURLDesc *srv, struct sockaddr *addr)
481 struct ldapoptions *lo;
486 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, s );
488 /* Invoke all handle-specific callbacks first */
489 lo = &ld->ld_options;
490 for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
492 rc = cb->lc_add( ld, sb, srv, addr, cb );
493 /* on any failure, call the teardown functions for anything
494 * that previously succeeded
498 for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
500 cb->lc_del( ld, sb, cb );
502 /* a failure might have implicitly closed the fd */
503 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
507 lo = LDAP_INT_GLOBAL_OPT();
508 for (ll = lo->ldo_conn_cbs; ll; ll = ll->ll_next) {
510 rc = cb->lc_add( ld, sb, srv, addr, cb );
513 for (l2 = lo->ldo_conn_cbs; l2 != ll; l2 = l2->ll_next) {
515 cb->lc_del( ld, sb, cb );
517 lo = &ld->ld_options;
518 for (l2 = lo->ldo_conn_cbs; l2; l2 = l2->ll_next) {
520 cb->lc_del( ld, sb, cb );
522 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, s );
530 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
531 int proto, LDAPURLDesc *srv,
536 ber_socket_t s = AC_SOCKET_INVALID;
539 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
542 struct addrinfo hints, *res, *sai;
546 struct hostent *hp = NULL;
547 struct hostent he_buf;
552 if ( srv->lud_host == NULL || *srv->lud_host == 0 ) {
555 host = srv->lud_host;
558 port = srv->lud_port;
561 if( strcmp(srv->lud_scheme, "ldaps") == 0 ) {
569 case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
571 "ldap_connect_to_host: TCP %s:%d\n",
574 case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
576 "ldap_connect_to_host: UDP %s:%d\n",
580 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
585 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
586 memset( &hints, '\0', sizeof(hints) );
587 #ifdef USE_AI_ADDRCONFIG /* FIXME: configure test needed */
588 /* Use AI_ADDRCONFIG only on systems where its known to be needed. */
589 hints.ai_flags = AI_ADDRCONFIG;
591 hints.ai_family = ldap_int_inet4or6;
592 hints.ai_socktype = socktype;
593 snprintf(serv, sizeof serv, "%d", port );
595 #ifdef LDAP_R_COMPILE
596 /* most getaddrinfo(3) use non-threadsafe resolver libraries */
597 ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
600 err = getaddrinfo( host, serv, &hints, &res );
602 #ifdef LDAP_R_COMPILE
603 ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
607 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
608 AC_GAI_STRERROR(err), 0, 0);
613 for( sai=res; sai != NULL; sai=sai->ai_next) {
614 if( sai->ai_addr == NULL ) {
615 osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
616 "ai_addr is NULL?\n", 0, 0, 0);
620 /* we assume AF_x and PF_x are equal for all x */
621 s = ldap_int_socket( ld, sai->ai_family, socktype );
622 if ( s == AC_SOCKET_INVALID ) {
626 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
627 ldap_pvt_close_socket(ld, s);
631 switch (sai->ai_family) {
634 char addr[INET6_ADDRSTRLEN];
636 &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
638 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
643 char addr[INET_ADDRSTRLEN];
645 &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
647 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
652 rc = ldap_pvt_connect( ld, s,
653 sai->ai_addr, sai->ai_addrlen, async );
654 if ( rc == 0 || rc == -2 ) {
655 err = ldap_int_connect_cbs( ld, sb, &s, srv, sai->ai_addr );
661 ldap_pvt_close_socket(ld, s);
666 if (! inet_aton( host, &in ) ) {
668 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
669 &hp, &local_h_errno );
671 if ( (rc < 0) || (hp == NULL) ) {
673 ldap_pvt_set_errno( WSAGetLastError() );
675 /* not exactly right, but... */
676 ldap_pvt_set_errno( EHOSTUNREACH );
678 if (ha_buf) LDAP_FREE(ha_buf);
686 for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
687 struct sockaddr_in sin;
689 s = ldap_int_socket( ld, PF_INET, socktype );
690 if ( s == AC_SOCKET_INVALID ) {
691 /* use_hp ? continue : break; */
695 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
696 ldap_pvt_close_socket(ld, s);
700 (void)memset((char *)&sin, '\0', sizeof sin);
701 sin.sin_family = AF_INET;
702 sin.sin_port = htons((unsigned short) port);
705 AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
706 sizeof(sin.sin_addr) );
708 AC_MEMCPY( &sin.sin_addr, &in.s_addr,
709 sizeof(sin.sin_addr) );
712 #ifdef HAVE_INET_NTOA_B
715 char address[INET_ADDR_LEN];
716 inet_ntoa_b(sin.sin_address, address);
717 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
721 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
722 inet_ntoa(sin.sin_addr), port, 0);
725 rc = ldap_pvt_connect(ld, s,
726 (struct sockaddr *)&sin, sizeof(sin),
729 if ( (rc == 0) || (rc == -2) ) {
730 i = ldap_int_connect_cbs( ld, sb, &s, srv, (struct sockaddr *)&sin );
737 ldap_pvt_close_socket(ld, s);
741 if (ha_buf) LDAP_FREE(ha_buf);
747 #if defined( HAVE_CYRUS_SASL )
749 ldap_host_connected_to( Sockbuf *sb, const char *host )
753 struct sockaddr_storage sabuf;
755 struct sockaddr sabuf;
757 struct sockaddr *sa = (struct sockaddr *) &sabuf;
760 (void)memset( (char *)sa, '\0', sizeof sabuf );
763 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
764 if ( getpeername( sd, sa, &len ) == -1 ) {
769 * do a reverse lookup on the addr to get the official hostname.
770 * this is necessary for kerberos to work right, since the official
771 * hostname is used as the kerberos instance.
774 switch (sa->sa_family) {
777 return LDAP_STRDUP( ldap_int_hostname );
782 struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
783 if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
784 &localhost, sizeof(localhost)) == 0 )
786 return LDAP_STRDUP( ldap_int_hostname );
793 struct in_addr localhost;
794 localhost.s_addr = htonl( INADDR_ANY );
796 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
797 &localhost, sizeof(localhost) ) == 0 )
799 return LDAP_STRDUP( ldap_int_hostname );
802 #ifdef INADDR_LOOPBACK
803 localhost.s_addr = htonl( INADDR_LOOPBACK );
805 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
806 &localhost, sizeof(localhost) ) == 0 )
808 return LDAP_STRDUP( ldap_int_hostname );
822 char hbuf[NI_MAXHOST];
823 #elif defined( MAXHOSTNAMELEN )
824 char hbuf[MAXHOSTNAMELEN];
830 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
833 return LDAP_STRDUP( hbuf );
837 return host ? LDAP_STRDUP( host ) : NULL;
844 /* for UNIX poll(2) */
846 struct pollfd si_fds[FD_SETSIZE];
848 /* for UNIX select(2) */
851 fd_set si_use_readfds;
852 fd_set si_use_writefds;
857 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
859 struct selectinfo *sip;
862 sip = (struct selectinfo *)ld->ld_selectinfo;
864 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
867 /* for UNIX poll(2) */
871 for(i=0; i < sip->si_maxfd; i++) {
872 if( sip->si_fds[i].fd == sd ) {
873 sip->si_fds[i].events |= POLL_WRITE;
876 if( empty==-1 && sip->si_fds[i].fd == -1 ) {
882 if( sip->si_maxfd >= FD_SETSIZE ) {
886 empty = sip->si_maxfd++;
889 sip->si_fds[empty].fd = sd;
890 sip->si_fds[empty].events = POLL_WRITE;
893 /* for UNIX select(2) */
894 if ( !FD_ISSET( sd, &sip->si_writefds )) {
895 FD_SET( sd, &sip->si_writefds );
902 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
904 struct selectinfo *sip;
907 sip = (struct selectinfo *)ld->ld_selectinfo;
909 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
912 /* for UNIX poll(2) */
916 for(i=0; i < sip->si_maxfd; i++) {
917 if( sip->si_fds[i].fd == sd ) {
918 sip->si_fds[i].events |= POLL_READ;
921 if( empty==-1 && sip->si_fds[i].fd == -1 ) {
927 if( sip->si_maxfd >= FD_SETSIZE ) {
931 empty = sip->si_maxfd++;
934 sip->si_fds[empty].fd = sd;
935 sip->si_fds[empty].events = POLL_READ;
938 /* for UNIX select(2) */
939 if ( !FD_ISSET( sd, &sip->si_readfds )) {
940 FD_SET( sd, &sip->si_readfds );
947 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
949 struct selectinfo *sip;
952 sip = (struct selectinfo *)ld->ld_selectinfo;
954 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
957 /* for UNIX poll(2) */
960 for(i=0; i < sip->si_maxfd; i++) {
961 if( sip->si_fds[i].fd == sd ) {
962 sip->si_fds[i].fd = -1;
967 /* for UNIX select(2) */
968 FD_CLR( sd, &sip->si_writefds );
969 FD_CLR( sd, &sip->si_readfds );
975 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
977 struct selectinfo *sip;
980 sip = (struct selectinfo *)ld->ld_selectinfo;
982 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
985 /* for UNIX poll(2) */
988 for(i=0; i < sip->si_maxfd; i++) {
989 if( sip->si_fds[i].fd == sd ) {
990 return sip->si_fds[i].revents & POLL_WRITE;
997 /* for UNIX select(2) */
998 return( FD_ISSET( sd, &sip->si_use_writefds ));
1004 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
1006 struct selectinfo *sip;
1009 sip = (struct selectinfo *)ld->ld_selectinfo;
1011 if (ber_sockbuf_ctrl( sb, LBER_SB_OPT_DATA_READY, NULL ))
1014 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
1017 /* for UNIX poll(2) */
1020 for(i=0; i < sip->si_maxfd; i++) {
1021 if( sip->si_fds[i].fd == sd ) {
1022 return sip->si_fds[i].revents & POLL_READ;
1029 /* for UNIX select(2) */
1030 return( FD_ISSET( sd, &sip->si_use_readfds ));
1036 ldap_new_select_info( void )
1038 struct selectinfo *sip;
1040 sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
1042 if ( sip == NULL ) return NULL;
1045 /* for UNIX poll(2) */
1046 /* sip->si_maxfd=0 */
1048 /* for UNIX select(2) */
1049 FD_ZERO( &sip->si_readfds );
1050 FD_ZERO( &sip->si_writefds );
1053 return( (void *)sip );
1058 ldap_free_select_info( void *sip )
1065 int ldap_int_tblsize = 0;
1068 ldap_int_ip_init( void )
1070 #if defined( HAVE_SYSCONF )
1071 long tblsize = sysconf( _SC_OPEN_MAX );
1072 if( tblsize > INT_MAX ) tblsize = INT_MAX;
1074 #elif defined( HAVE_GETDTABLESIZE )
1075 int tblsize = getdtablesize();
1077 int tblsize = FD_SETSIZE;
1078 #endif /* !USE_SYSCONF */
1081 if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
1082 #endif /* FD_SETSIZE */
1084 ldap_int_tblsize = tblsize;
1090 ldap_int_select( LDAP *ld, struct timeval *timeout )
1093 struct selectinfo *sip;
1095 Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
1098 if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
1101 sip = (struct selectinfo *)ld->ld_selectinfo;
1102 assert( sip != NULL );
1106 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
1107 rc = poll( sip->si_fds, sip->si_maxfd, to );
1110 sip->si_use_readfds = sip->si_readfds;
1111 sip->si_use_writefds = sip->si_writefds;
1113 rc = select( ldap_int_tblsize,
1114 &sip->si_use_readfds, &sip->si_use_writefds,