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) );
397 hints.ai_flags = AI_ADDRCONFIG;
399 hints.ai_family = ldap_int_inet4or6;
400 hints.ai_socktype = socktype;
401 snprintf(serv, sizeof serv, "%d", port );
403 #ifdef LDAP_R_COMPILE
404 /* most getaddrinfo(3) use non-threadsafe resolver libraries */
405 ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
408 err = getaddrinfo( host, serv, &hints, &res );
410 #ifdef LDAP_R_COMPILE
411 ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
415 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
416 AC_GAI_STRERROR(err), 0, 0);
421 for( sai=res; sai != NULL; sai=sai->ai_next) {
422 if( sai->ai_addr == NULL ) {
423 osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
424 "ai_addr is NULL?\n", 0, 0, 0);
428 /* we assume AF_x and PF_x are equal for all x */
429 s = ldap_int_socket( ld, sai->ai_family, socktype );
430 if ( s == AC_SOCKET_INVALID ) {
434 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
435 ldap_pvt_close_socket(ld, s);
439 switch (sai->ai_family) {
442 char addr[INET6_ADDRSTRLEN];
444 &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
446 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
451 char addr[INET_ADDRSTRLEN];
453 &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
455 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
460 rc = ldap_pvt_connect( ld, s,
461 sai->ai_addr, sai->ai_addrlen, async );
462 if ( (rc == 0) || (rc == -2) ) {
463 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
466 ldap_pvt_close_socket(ld, s);
471 if (! inet_aton( host, &in ) ) {
473 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
474 &hp, &local_h_errno );
476 if ( (rc < 0) || (hp == NULL) ) {
478 ldap_pvt_set_errno( WSAGetLastError() );
480 /* not exactly right, but... */
481 ldap_pvt_set_errno( EHOSTUNREACH );
483 if (ha_buf) LDAP_FREE(ha_buf);
491 for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
492 struct sockaddr_in sin;
494 s = ldap_int_socket( ld, PF_INET, socktype );
495 if ( s == AC_SOCKET_INVALID ) {
496 /* use_hp ? continue : break; */
500 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
501 ldap_pvt_close_socket(ld, s);
505 (void)memset((char *)&sin, '\0', sizeof sin);
506 sin.sin_family = AF_INET;
507 sin.sin_port = htons((short) port);
510 AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
511 sizeof(sin.sin_addr) );
513 AC_MEMCPY( &sin.sin_addr, &in.s_addr,
514 sizeof(sin.sin_addr) );
517 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
518 inet_ntoa(sin.sin_addr), port, 0);
520 rc = ldap_pvt_connect(ld, s,
521 (struct sockaddr *)&sin, sizeof(sin),
524 if ( (rc == 0) || (rc == -2) ) {
525 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
529 ldap_pvt_close_socket(ld, s);
533 if (ha_buf) LDAP_FREE(ha_buf);
539 #if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND ) || \
540 defined( HAVE_CYRUS_SASL )
542 ldap_host_connected_to( Sockbuf *sb, const char *host )
546 struct sockaddr_storage sabuf;
548 struct sockaddr sabuf;
550 struct sockaddr *sa = (struct sockaddr *) &sabuf;
553 (void)memset( (char *)sa, '\0', sizeof sabuf );
556 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
557 if ( getpeername( sd, sa, &len ) == -1 ) {
562 * do a reverse lookup on the addr to get the official hostname.
563 * this is necessary for kerberos to work right, since the official
564 * hostname is used as the kerberos instance.
567 switch (sa->sa_family) {
570 return LDAP_STRDUP( ldap_int_hostname );
575 struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
576 if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
577 &localhost, sizeof(localhost)) == 0 )
579 return LDAP_STRDUP( ldap_int_hostname );
586 struct in_addr localhost;
587 localhost.s_addr = htonl( INADDR_ANY );
589 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
590 &localhost, sizeof(localhost) ) == 0 )
592 return LDAP_STRDUP( ldap_int_hostname );
595 #ifdef INADDR_LOOPBACK
596 localhost.s_addr = htonl( INADDR_LOOPBACK );
598 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
599 &localhost, sizeof(localhost) ) == 0 )
601 return LDAP_STRDUP( ldap_int_hostname );
615 char hbuf[NI_MAXHOST];
616 #elif defined( MAXHOSTNAMELEN
617 char hbuf[MAXHOSTNAMELEN];
623 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
626 return LDAP_STRDUP( hbuf );
630 return host ? LDAP_STRDUP( host ) : NULL;
636 /* for UNIX poll(2) */
639 /* for UNIX select(2) */
643 fd_set si_use_readfds;
644 fd_set si_use_writefds;
649 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
651 struct selectinfo *sip;
654 sip = (struct selectinfo *)ld->ld_selectinfo;
656 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
657 if ( !FD_ISSET( sd, &sip->si_writefds )) {
658 FD_SET( sd, &sip->si_writefds );
664 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
666 struct selectinfo *sip;
669 sip = (struct selectinfo *)ld->ld_selectinfo;
671 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
672 if ( !FD_ISSET( sd, &sip->si_readfds )) {
673 FD_SET( sd, &sip->si_readfds );
679 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
681 struct selectinfo *sip;
684 sip = (struct selectinfo *)ld->ld_selectinfo;
686 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
687 FD_CLR( sd, &sip->si_writefds );
688 FD_CLR( sd, &sip->si_readfds );
693 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
695 struct selectinfo *sip;
698 sip = (struct selectinfo *)ld->ld_selectinfo;
700 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
701 return( FD_ISSET( sd, &sip->si_use_writefds ));
706 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
708 struct selectinfo *sip;
711 sip = (struct selectinfo *)ld->ld_selectinfo;
713 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
714 return( FD_ISSET( sd, &sip->si_use_readfds ));
719 ldap_new_select_info( void )
721 struct selectinfo *sip;
723 if (( sip = (struct selectinfo *)LDAP_CALLOC( 1,
724 sizeof( struct selectinfo ))) != NULL ) {
725 FD_ZERO( &sip->si_readfds );
726 FD_ZERO( &sip->si_writefds );
729 return( (void *)sip );
734 ldap_free_select_info( void *sip )
741 int ldap_int_tblsize = 0;
744 ldap_int_ip_init( void )
748 #if defined( HAVE_SYSCONF )
749 tblsize = sysconf( _SC_OPEN_MAX );
750 #elif defined( HAVE_GETDTABLESIZE )
751 tblsize = getdtablesize();
753 tblsize = FD_SETSIZE;
754 #endif /* !USE_SYSCONF */
757 if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
758 #endif /* FD_SETSIZE*/
760 ldap_int_tblsize = tblsize;
766 ldap_int_select( LDAP *ld, struct timeval *timeout )
768 struct selectinfo *sip;
771 LDAP_LOG ( CONNECTION, ENTRY, "ldap_int_select\n", 0, 0, 0 );
773 Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
777 if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
780 sip = (struct selectinfo *)ld->ld_selectinfo;
781 sip->si_use_readfds = sip->si_readfds;
782 sip->si_use_writefds = sip->si_writefds;
788 return( select( ldap_int_tblsize,
789 &sip->si_use_readfds, &sip->si_use_writefds,