1 /* os-ip.c -- platform-specific TCP & UDP related code */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 * Copyright 1998-2005 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 );
263 fd.events = POLL_WRITE;
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 & POLL_WRITE ) {
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;
287 if ( s >= FD_SETSIZE ) {
288 rc = AC_SOCKET_ERROR;
290 ldap_pvt_set_errno( EMFILE );
303 rc = select(ldap_int_tblsize, z, &wfds,
309 opt_tv ? &tv : NULL);
310 } while( rc == AC_SOCKET_ERROR && errno == EINTR &&
311 LDAP_BOOL_GET(&ld->ld_options, LDAP_BOOL_RESTART ));
313 if( rc == AC_SOCKET_ERROR ) return rc;
316 /* This means the connection failed */
317 if ( FD_ISSET(s, &efds) ) {
319 int dummy = sizeof(so_errno);
320 if ( getsockopt( s, SOL_SOCKET, SO_ERROR,
321 (char *) &so_errno, &dummy ) == AC_SOCKET_ERROR || !so_errno )
324 so_errno = WSAGetLastError();
326 ldap_pvt_set_errno(so_errno);
327 osip_debug(ld, "ldap_pvt_connect: error on socket %d: "
328 "errno: %d (%s)\n", s, errno, sock_errstr(errno));
332 if ( FD_ISSET(s, &wfds) ) {
334 if ( ldap_pvt_is_socket_ready(ld, s) == -1 ) return -1;
336 if ( ldap_pvt_ndelay_off(ld, s) == -1 ) return -1;
342 osip_debug(ld, "ldap_connect_timeout: timed out\n",0,0,0);
343 ldap_pvt_set_errno( ETIMEDOUT );
347 #ifndef HAVE_INET_ATON
349 ldap_pvt_inet_aton( const char *host, struct in_addr *in)
351 unsigned long u = inet_addr( host );
354 if ( u == INADDR_NONE ) return 0;
356 if ( u == 0xffffffffUL || u == (unsigned long) -1L ) return 0;
365 ldap_connect_to_host(LDAP *ld, Sockbuf *sb,
367 const char *host, int port,
372 ber_socket_t s = AC_SOCKET_INVALID;
374 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
377 struct addrinfo hints, *res, *sai;
381 struct hostent *hp = NULL;
382 struct hostent he_buf;
387 if( host == NULL ) host = "localhost";
390 case LDAP_PROTO_TCP: socktype = SOCK_STREAM;
392 "ldap_connect_to_host: TCP %s:%d\n",
395 case LDAP_PROTO_UDP: socktype = SOCK_DGRAM;
397 "ldap_connect_to_host: UDP %s:%d\n",
401 osip_debug( ld, "ldap_connect_to_host: unknown proto: %d\n",
406 #if defined( HAVE_GETADDRINFO ) && defined( HAVE_INET_NTOP )
407 memset( &hints, '\0', sizeof(hints) );
408 #ifdef USE_AI_ATTRCONFIG /* FIXME: configure test needed */
409 /* Use AI_ATTRCONFIG only on systems where its known to be needed. */
410 hints.ai_flags = AI_ATTRCONFIG;
412 hints.ai_family = ldap_int_inet4or6;
413 hints.ai_socktype = socktype;
414 snprintf(serv, sizeof serv, "%d", port );
416 #ifdef LDAP_R_COMPILE
417 /* most getaddrinfo(3) use non-threadsafe resolver libraries */
418 ldap_pvt_thread_mutex_lock(&ldap_int_resolv_mutex);
421 err = getaddrinfo( host, serv, &hints, &res );
423 #ifdef LDAP_R_COMPILE
424 ldap_pvt_thread_mutex_unlock(&ldap_int_resolv_mutex);
428 osip_debug(ld, "ldap_connect_to_host: getaddrinfo failed: %s\n",
429 AC_GAI_STRERROR(err), 0, 0);
434 for( sai=res; sai != NULL; sai=sai->ai_next) {
435 if( sai->ai_addr == NULL ) {
436 osip_debug(ld, "ldap_connect_to_host: getaddrinfo "
437 "ai_addr is NULL?\n", 0, 0, 0);
441 /* we assume AF_x and PF_x are equal for all x */
442 s = ldap_int_socket( ld, sai->ai_family, socktype );
443 if ( s == AC_SOCKET_INVALID ) {
447 if ( ldap_int_prepare_socket(ld, s, proto ) == -1 ) {
448 ldap_pvt_close_socket(ld, s);
452 switch (sai->ai_family) {
455 char addr[INET6_ADDRSTRLEN];
457 &((struct sockaddr_in6 *)sai->ai_addr)->sin6_addr,
459 osip_debug(ld, "ldap_connect_to_host: Trying %s %s\n",
464 char addr[INET_ADDRSTRLEN];
466 &((struct sockaddr_in *)sai->ai_addr)->sin_addr,
468 osip_debug(ld, "ldap_connect_to_host: Trying %s:%s\n",
473 rc = ldap_pvt_connect( ld, s,
474 sai->ai_addr, sai->ai_addrlen, async );
475 if ( (rc == 0) || (rc == -2) ) {
476 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
479 ldap_pvt_close_socket(ld, s);
484 if (! inet_aton( host, &in ) ) {
486 rc = ldap_pvt_gethostbyname_a( host, &he_buf, &ha_buf,
487 &hp, &local_h_errno );
489 if ( (rc < 0) || (hp == NULL) ) {
491 ldap_pvt_set_errno( WSAGetLastError() );
493 /* not exactly right, but... */
494 ldap_pvt_set_errno( EHOSTUNREACH );
496 if (ha_buf) LDAP_FREE(ha_buf);
504 for ( i = 0; !use_hp || (hp->h_addr_list[i] != 0); ++i, rc = -1 ) {
505 struct sockaddr_in sin;
507 s = ldap_int_socket( ld, PF_INET, socktype );
508 if ( s == AC_SOCKET_INVALID ) {
509 /* use_hp ? continue : break; */
513 if ( ldap_int_prepare_socket( ld, s, proto ) == -1 ) {
514 ldap_pvt_close_socket(ld, s);
518 (void)memset((char *)&sin, '\0', sizeof sin);
519 sin.sin_family = AF_INET;
520 sin.sin_port = htons((short) port);
523 AC_MEMCPY( &sin.sin_addr, hp->h_addr_list[i],
524 sizeof(sin.sin_addr) );
526 AC_MEMCPY( &sin.sin_addr, &in.s_addr,
527 sizeof(sin.sin_addr) );
530 osip_debug(ld, "ldap_connect_to_host: Trying %s:%d\n",
531 inet_ntoa(sin.sin_addr), port, 0);
533 rc = ldap_pvt_connect(ld, s,
534 (struct sockaddr *)&sin, sizeof(sin),
537 if ( (rc == 0) || (rc == -2) ) {
538 ber_sockbuf_ctrl( sb, LBER_SB_OPT_SET_FD, &s );
542 ldap_pvt_close_socket(ld, s);
546 if (ha_buf) LDAP_FREE(ha_buf);
552 #if defined( LDAP_API_FEATURE_X_OPENLDAP_V2_KBIND ) || \
553 defined( HAVE_CYRUS_SASL )
555 ldap_host_connected_to( Sockbuf *sb, const char *host )
559 struct sockaddr_storage sabuf;
561 struct sockaddr sabuf;
563 struct sockaddr *sa = (struct sockaddr *) &sabuf;
566 (void)memset( (char *)sa, '\0', sizeof sabuf );
569 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
570 if ( getpeername( sd, sa, &len ) == -1 ) {
575 * do a reverse lookup on the addr to get the official hostname.
576 * this is necessary for kerberos to work right, since the official
577 * hostname is used as the kerberos instance.
580 switch (sa->sa_family) {
583 return LDAP_STRDUP( ldap_int_hostname );
588 struct in6_addr localhost = IN6ADDR_LOOPBACK_INIT;
589 if( memcmp ( &((struct sockaddr_in6 *)sa)->sin6_addr,
590 &localhost, sizeof(localhost)) == 0 )
592 return LDAP_STRDUP( ldap_int_hostname );
599 struct in_addr localhost;
600 localhost.s_addr = htonl( INADDR_ANY );
602 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
603 &localhost, sizeof(localhost) ) == 0 )
605 return LDAP_STRDUP( ldap_int_hostname );
608 #ifdef INADDR_LOOPBACK
609 localhost.s_addr = htonl( INADDR_LOOPBACK );
611 if( memcmp ( &((struct sockaddr_in *)sa)->sin_addr,
612 &localhost, sizeof(localhost) ) == 0 )
614 return LDAP_STRDUP( ldap_int_hostname );
628 char hbuf[NI_MAXHOST];
629 #elif defined( MAXHOSTNAMELEN
630 char hbuf[MAXHOSTNAMELEN];
636 if (ldap_pvt_get_hname( sa, len, hbuf, sizeof(hbuf), &herr ) == 0
639 return LDAP_STRDUP( hbuf );
643 return host ? LDAP_STRDUP( host ) : NULL;
650 /* for UNIX poll(2) */
652 struct pollfd si_fds[FD_SETSIZE];
654 /* for UNIX select(2) */
657 fd_set si_use_readfds;
658 fd_set si_use_writefds;
663 ldap_mark_select_write( LDAP *ld, Sockbuf *sb )
665 struct selectinfo *sip;
668 sip = (struct selectinfo *)ld->ld_selectinfo;
670 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
673 /* for UNIX poll(2) */
677 for(i=0; i < sip->si_maxfd; i++) {
678 if( sip->si_fds[i].fd == sd ) {
679 sip->si_fds[i].events |= POLL_WRITE;
682 if( empty==-1 && sip->si_fds[i].fd == -1 ) {
688 if( sip->si_maxfd >= FD_SETSIZE ) {
692 empty = sip->si_maxfd++;
695 sip->si_fds[empty].fd = sd;
696 sip->si_fds[empty].events = POLL_WRITE;
699 /* for UNIX select(2) */
700 if ( !FD_ISSET( sd, &sip->si_writefds )) {
701 FD_SET( sd, &sip->si_writefds );
708 ldap_mark_select_read( LDAP *ld, Sockbuf *sb )
710 struct selectinfo *sip;
713 sip = (struct selectinfo *)ld->ld_selectinfo;
715 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
718 /* for UNIX poll(2) */
722 for(i=0; i < sip->si_maxfd; i++) {
723 if( sip->si_fds[i].fd == sd ) {
724 sip->si_fds[i].events |= POLL_READ;
727 if( empty==-1 && sip->si_fds[i].fd == -1 ) {
733 if( sip->si_maxfd >= FD_SETSIZE ) {
737 empty = sip->si_maxfd++;
740 sip->si_fds[empty].fd = sd;
741 sip->si_fds[empty].events = POLL_READ;
744 /* for UNIX select(2) */
745 if ( !FD_ISSET( sd, &sip->si_readfds )) {
746 FD_SET( sd, &sip->si_readfds );
753 ldap_mark_select_clear( LDAP *ld, Sockbuf *sb )
755 struct selectinfo *sip;
758 sip = (struct selectinfo *)ld->ld_selectinfo;
760 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
763 /* for UNIX poll(2) */
766 for(i=0; i < sip->si_maxfd; i++) {
767 if( sip->si_fds[i].fd == sd ) {
768 sip->si_fds[i].fd = -1;
773 /* for UNIX select(2) */
774 FD_CLR( sd, &sip->si_writefds );
775 FD_CLR( sd, &sip->si_readfds );
781 ldap_is_write_ready( LDAP *ld, Sockbuf *sb )
783 struct selectinfo *sip;
786 sip = (struct selectinfo *)ld->ld_selectinfo;
788 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
791 /* for UNIX poll(2) */
794 for(i=0; i < sip->si_maxfd; i++) {
795 if( sip->si_fds[i].fd == sd ) {
796 return sip->si_fds[i].revents & POLL_WRITE;
803 /* for UNIX select(2) */
804 return( FD_ISSET( sd, &sip->si_use_writefds ));
810 ldap_is_read_ready( LDAP *ld, Sockbuf *sb )
812 struct selectinfo *sip;
815 sip = (struct selectinfo *)ld->ld_selectinfo;
817 ber_sockbuf_ctrl( sb, LBER_SB_OPT_GET_FD, &sd );
820 /* for UNIX poll(2) */
823 for(i=0; i < sip->si_maxfd; i++) {
824 if( sip->si_fds[i].fd == sd ) {
825 return sip->si_fds[i].revents & POLL_READ;
832 /* for UNIX select(2) */
833 return( FD_ISSET( sd, &sip->si_use_readfds ));
839 ldap_new_select_info( void )
841 struct selectinfo *sip;
843 sip = (struct selectinfo *)LDAP_CALLOC( 1, sizeof( struct selectinfo ));
845 if ( sip == NULL ) return NULL;
848 /* for UNIX poll(2) */
849 /* sip->si_maxfd=0 */
851 /* for UNIX select(2) */
852 FD_ZERO( &sip->si_readfds );
853 FD_ZERO( &sip->si_writefds );
856 return( (void *)sip );
861 ldap_free_select_info( void *sip )
868 int ldap_int_tblsize = 0;
871 ldap_int_ip_init( void )
875 #if defined( HAVE_SYSCONF )
876 tblsize = sysconf( _SC_OPEN_MAX );
877 #elif defined( HAVE_GETDTABLESIZE )
878 tblsize = getdtablesize();
880 tblsize = FD_SETSIZE;
881 #endif /* !USE_SYSCONF */
884 if( tblsize > FD_SETSIZE ) tblsize = FD_SETSIZE;
885 #endif /* FD_SETSIZE */
887 ldap_int_tblsize = tblsize;
893 ldap_int_select( LDAP *ld, struct timeval *timeout )
896 struct selectinfo *sip;
898 Debug( LDAP_DEBUG_TRACE, "ldap_int_select\n", 0, 0, 0 );
901 if ( ldap_int_tblsize == 0 ) ldap_int_ip_init();
904 sip = (struct selectinfo *)ld->ld_selectinfo;
908 int to = timeout ? TV2MILLISEC( timeout ) : INFTIM;
909 rc = poll( sip->si_fds, sip->si_maxfd, to );
912 sip->si_use_readfds = sip->si_readfds;
913 sip->si_use_writefds = sip->si_writefds;
915 rc = select( ldap_int_tblsize,
916 &sip->si_use_readfds, &sip->si_use_writefds,