1 /* os-ip.c -- platform-specific TCP & UDP related code */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1998-2004 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 */
42 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
44 int ldap_int_inet4or6 = AF_UNSPEC;
46 int ldap_int_inet4or6 = AF_INET;
52 #define osip_debug(ld,fmt,arg1,arg2,arg3) \
54 ldap_log_printf(NULL, LDAP_DEBUG_TRACE, fmt, arg1, arg2, arg3); \
59 #define osip_debug(ld,fmt,arg1,arg2,arg3) ((void)0)
61 #endif /* LDAP_DEBUG */
64 ldap_pvt_set_errno(int err)
70 ldap_int_timeval_dup( struct timeval **dest, const struct timeval *src )
74 assert( dest != NULL );
81 new = (struct timeval *) LDAP_MALLOC(sizeof(struct timeval));
88 AC_MEMCPY( (char *) new, (const char *) src, sizeof(struct timeval));
95 ldap_pvt_ndelay_on(LDAP *ld, int fd)
97 osip_debug(ld, "ldap_ndelay_on: %d\n",fd,0,0);
98 return ber_pvt_socket_set_nonblock( fd, 1 );
102 ldap_pvt_ndelay_off(LDAP *ld, int fd)
104 osip_debug(ld, "ldap_ndelay_off: %d\n",fd,0,0);
105 return ber_pvt_socket_set_nonblock( fd, 0 );
109 ldap_int_socket(LDAP *ld, int family, int type )
111 ber_socket_t s = socket(family, type, 0);
112 osip_debug(ld, "ldap_new_socket: %d\n",s,0,0);
117 ldap_pvt_close_socket(LDAP *ld, int s)
119 osip_debug(ld, "ldap_close_socket: %d\n",s,0,0);
124 ldap_int_prepare_socket(LDAP *ld, int s, int proto )
126 osip_debug(ld, "ldap_prepare_socket: %d\n", s,0,0);
129 if( proto == LDAP_PROTO_TCP ) {
131 if ( setsockopt( s, IPPROTO_TCP, TCP_NODELAY,
132 (char*) &dummy, sizeof(dummy) ) == AC_SOCKET_ERROR )
134 osip_debug(ld, "ldap_prepare_socket: "
135 "setsockopt(%d, TCP_NODELAY) failed (ignored).\n",
149 "ldap_is_socket_ready: error on socket %d: errno: %d (%s)\n", \
152 sock_errstr(errno) ); \
156 * check the socket for errors after select returned.
159 ldap_pvt_is_socket_ready(LDAP *ld, int s)
161 osip_debug(ld, "ldap_is_sock_ready: %d\n",s,0,0);
163 #if defined( notyet ) /* && defined( SO_ERROR ) */
166 socklen_t dummy = sizeof(so_errno);
167 if ( getsockopt( s, SOL_SOCKET, SO_ERROR, &so_errno, &dummy )
173 ldap_pvt_set_errno(so_errno);
183 struct sockaddr_storage sin;
185 struct sockaddr_in sin;
188 socklen_t dummy = sizeof(sin);
189 if ( getpeername( s, (struct sockaddr *) &sin, &dummy )
192 /* XXX: needs to be replace with ber_stream_read() */
204 #endif /* HAVE_WINSOCK */
207 ldap_pvt_connect(LDAP *ld, ber_socket_t s,
208 struct sockaddr *sin, socklen_t addrlen,
212 struct timeval tv, *opt_tv=NULL;
214 #ifdef LDAP_CONNECTIONLESS
215 /* We could do a connect() but that would interfere with
216 * attempts to poll a broadcast address
218 if (LDAP_IS_UDP(ld)) {
219 if (ld->ld_options.ldo_peer)
220 ldap_memfree(ld->ld_options.ldo_peer);
221 ld->ld_options.ldo_peer=ldap_memalloc(sizeof(struct sockaddr));
222 AC_MEMCPY(ld->ld_options.ldo_peer,sin,sizeof(struct sockaddr));
226 if ( (opt_tv = ld->ld_options.ldo_tm_net) != NULL ) {
227 tv.tv_usec = opt_tv->tv_usec;
228 tv.tv_sec = opt_tv->tv_sec;
231 osip_debug(ld, "ldap_connect_timeout: fd: %d tm: %ld async: %d\n",
232 s, opt_tv ? tv.tv_sec : -1L, async);
234 if ( ldap_pvt_ndelay_on(ld, s) == -1 )
237 if ( connect(s, sin, addrlen) != AC_SOCKET_ERROR ) {
238 if ( ldap_pvt_ndelay_off(ld, s) == -1 )
244 ldap_pvt_set_errno( WSAGetLastError() );
247 if ( errno != EINPROGRESS && errno != EWOULDBLOCK ) {
252 if ( async ) return ( -2 );
258 int timeout = INFTIM;
260 if( opt_tv != NULL ) timeout = TV2MILLISEC( &tv );
267 rc = poll( &fd, 1, timeout );
268 } while( rc == AC_SOCKET_ERROR && errno == EINTR &&
269 LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
271 if( rc == AC_SOCKET_ERROR ) return rc;
273 if( fd.revents & POLLOUT ) {
274 if ( ldap_pvt_is_socket_ready(ld, s) == -1 ) return -1;
275 if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
281 fd_set wfds, *z=NULL;
294 rc = select(ldap_int_tblsize, z, &wfds,
300 opt_tv ? &tv : NULL);
301 } while( rc == AC_SOCKET_ERROR && errno == EINTR &&
302 LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
304 if( rc == AC_SOCKET_ERROR ) return rc;
307 /* This means the connection failed */
308 if ( FD_ISSET(s, &efds) ) {
310 int dummy = sizeof(so_errno);
311 if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
312 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
315 so_errno = WSAGetLastError();
317 ldap_pvt_set_errno(so_errno);
318 osip_debug(ld, "ldap_pvt_connect: error on socket %d: "
319 "errno: %d (%s)\n", s, errno, sock_errstr(errno));
323 if ( FD_ISSET(s, &wfds) ) {
325 if ( ldap_pvt_is_socket_ready(ld, s) == -1 ) return -1;
327 if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
333 osip_debug(ld, "ldap_connect_timeout: timed out\n",0,0,0);
334 ldap_pvt_set_errno( ETIMEDOUT );
338 #ifndef HAVE_INET_ATON
340 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
342 unsigned long u = inet_addr( host );
343 if ( u != 0xffffffff || u != (unsigned long) -1 ) {
353 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
355 const char *host, int port,
360 ber_socket_t s = AC_SOCKET_INVALID;
362 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
365 struct addrinfo hints, *res, *sai;
369 struct hostent *hp = NULL;
370 struct hostent he_buf;
375 if( host == NULL ) host = "localhost";
378 case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
380 "ldap_connect_to_host: TCP %s:%d\n",
383 case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
385 "ldap_connect_to_host: UDP %s:%d\n",
389 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
394 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
395 memset( &hints, '\0', sizeof(hints) );
396 hints.ai_family = ldap_int_inet4or6;
397 hints.ai_socktype = socktype;
398 snprintf(serv, sizeof serv, "%d", port );
400 #ifdef LDAP_R_COMPILE
401 /* most getaddrinfo(3) use non-threadsafe resolver libraries */
402 ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
405 err = getaddrinfo( host, serv, &hints, &res );
407 #ifdef LDAP_R_COMPILE
408 ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
412 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
413 AC_GAI_STRERROR(err), 0, 0);
418 for( sai=res; sai != NULL; sai=sai->ai_next) {
419 if( sai->ai_addr == NULL ) {
420 osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
421 "ai_addr is NULL?\n", 0, 0, 0);
425 /* we assume AF_x and PF_x are equal for all x */
426 s = ldap_int_socket( ld, sai->ai_family, socktype );
427 if ( s == AC_SOCKET_INVALID ) {
431 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
432 ldap_pvt_close_socket(ld, s);
436 switch (sai->ai_family) {
439 char addr[INET6_ADDRSTRLEN];
441 &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
443 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
448 char addr[INET_ADDRSTRLEN];
450 &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
452 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
457 rc = ldap_pvt_connect( ld, s,
458 sai->ai_addr, sai->ai_addrlen, async );
459 if ( (rc == 0) || (rc == -2) ) {
460 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
463 ldap_pvt_close_socket(ld, s);
468 if (! inet_aton( host, &in ) ) {
470 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
471 &hp, &local_h_errno );
473 if ( (rc < 0) || (hp == NULL) ) {
475 ldap_pvt_set_errno( WSAGetLastError() );
477 /* not exactly right, but... */
478 ldap_pvt_set_errno( EHOSTUNREACH );
480 if (ha_buf) LDAP_FREE(ha_buf);
488 for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
489 struct sockaddr_in sin;
491 s = ldap_int_socket( ld, PF_INET, socktype );
492 if ( s == AC_SOCKET_INVALID ) {
493 /* use_hp ? continue : break; */
497 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
498 ldap_pvt_close_socket(ld, s);
502 (void)memset((char *)&sin, '\0', sizeof sin);
503 sin.sin_family = AF_INET;
504 sin.sin_port = htons((short) port);
507 AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
508 sizeof(sin.sin_addr) );
510 AC_MEMCPY( &sin.sin_addr, &in.s_addr,
511 sizeof(sin.sin_addr) );
514 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
515 inet_ntoa(sin.sin_addr), port, 0);
517 rc = ldap_pvt_connect(ld, s,
518 (struct sockaddr *)&sin, sizeof(sin),
521 if ( (rc == 0) || (rc == -2) ) {
522 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
526 ldap_pvt_close_socket(ld, s);
530 if (ha_buf) LDAP_FREE(ha_buf);
536 #if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND ) || \
537 defined( HAVE_CYRUS_SASL )
539 ldap_host_connected_to( Sockbuf *sb, const char *host )
543 struct sockaddr_storage sabuf;
545 struct sockaddr sabuf;
547 struct sockaddr *sa = (struct sockaddr *) &sabuf;
550 (void)memset( (char *)sa, '\0', sizeof sabuf );
553 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
554 if ( getpeername( sd, sa, &len ) == -1 ) {
559 * do a reverse lookup on the addr to get the official hostname.
560 * this is necessary for kerberos to work right, since the official
561 * hostname is used as the kerberos instance.
564 switch (sa->sa_family) {
567 return LDAP_STRDUP( ldap_int_hostname );
572 struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
573 if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
574 &localhost, sizeof(localhost)) == 0 )
576 return LDAP_STRDUP( ldap_int_hostname );
583 struct in_addr localhost;
584 localhost.s_addr = htonl( INADDR_ANY );
586 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
587 &localhost, sizeof(localhost) ) == 0 )
589 return LDAP_STRDUP( ldap_int_hostname );
592 #ifdef INADDR_LOOPBACK
593 localhost.s_addr = htonl( INADDR_LOOPBACK );
595 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
596 &localhost, sizeof(localhost) ) == 0 )
598 return LDAP_STRDUP( ldap_int_hostname );
612 char hbuf[NI_MAXHOST];
613 #elif defined( MAXHOSTNAMELEN
614 char hbuf[MAXHOSTNAMELEN];
620 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
623 return LDAP_STRDUP( hbuf );
627 return host ? LDAP_STRDUP( host ) : NULL;
633 /* for UNIX poll(2) */
636 /* for UNIX select(2) */
640 fd_set si_use_readfds;
641 fd_set si_use_writefds;
646 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
648 struct selectinfo *sip;
651 sip = (struct selectinfo *)ld->ld_selectinfo;
653 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
654 if ( !FD_ISSET( sd, &sip->si_writefds )) {
655 FD_SET( sd, &sip->si_writefds );
661 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
663 struct selectinfo *sip;
666 sip = (struct selectinfo *)ld->ld_selectinfo;
668 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
669 if ( !FD_ISSET( sd, &sip->si_readfds )) {
670 FD_SET( sd, &sip->si_readfds );
676 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
678 struct selectinfo *sip;
681 sip = (struct selectinfo *)ld->ld_selectinfo;
683 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
684 FD_CLR( sd, &sip->si_writefds );
685 FD_CLR( sd, &sip->si_readfds );
690 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
692 struct selectinfo *sip;
695 sip = (struct selectinfo *)ld->ld_selectinfo;
697 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
698 return( FD_ISSET( sd, &sip->si_use_writefds ));
703 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
705 struct selectinfo *sip;
708 sip = (struct selectinfo *)ld->ld_selectinfo;
710 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
711 return( FD_ISSET( sd, &sip->si_use_readfds ));
716 ldap_new_select_info( void )
718 struct selectinfo *sip;
720 if (( sip = (struct selectinfo *)LDAP_CALLOC( 1,
721 sizeof( struct selectinfo ))) != NULL ) {
722 FD_ZERO( &sip->si_readfds );
723 FD_ZERO( &sip->si_writefds );
726 return( (void *)sip );
731 ldap_free_select_info( void *sip )
738 int ldap_int_tblsize = 0;
741 ldap_int_ip_init( void )
745 #if defined( HAVE_SYSCONF )
746 tblsize = sysconf( _SC_OPEN_MAX );
747 #elif defined( HAVE_GETDTABLESIZE )
748 tblsize = getdtablesize();
750 tblsize = FD_SETSIZE;
751 #endif /* !USE_SYSCONF */
754 if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
755 #endif /* FD_SETSIZE*/
757 ldap_int_tblsize = tblsize;
763 ldap_int_select( LDAP *ld, struct timeval *timeout )
765 struct selectinfo *sip;
768 LDAP_LOG ( CONNECTION, ENTRY, "ldap_int_select\n", 0, 0, 0 );
770 Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
774 if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
777 sip = (struct selectinfo *)ld->ld_selectinfo;
778 sip->si_use_readfds = sip->si_readfds;
779 sip->si_use_writefds = sip->si_writefds;
785 return( select( ldap_int_tblsize,
786 &sip->si_use_readfds, &sip->si_use_writefds,