2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2009 The OpenLDAP Foundation.
5 * Portions Copyright 1998 A. Hartgers.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
17 * This work was initially developed by Bart Hartgers for inclusion in
22 * util-int.c Various functions to replace missing threadsafe ones.
23 * Without the real *_r funcs, things will
24 * work, but might not be threadsafe.
29 #include <ac/stdlib.h>
32 #include <ac/socket.h>
33 #include <ac/string.h>
35 #include <ac/unistd.h>
40 /* newer systems declare this in <netdb.h> for you, older ones don't.
41 * harmless to declare it again (unless defined by a macro).
47 # define HSTRERROR(e) hstrerror(e)
49 # define HSTRERROR(e) hp_strerror(e)
52 #ifndef LDAP_R_COMPILE
53 # undef HAVE_REENTRANT_FUNCTIONS
55 # undef HAVE_GETHOSTBYNAME_R
56 # undef HAVE_GETHOSTBYADDR_R
59 # include <ldap_pvt_thread.h>
60 ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
62 # if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
63 && defined( CTIME_R_NARGS )
66 static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
69 # if defined(HAVE_GETHOSTBYNAME_R) && \
70 (GETHOSTBYNAME_R_NARGS < 5) || (6 < GETHOSTBYNAME_R_NARGS)
71 /* Don't know how to handle this version, pretend it's not there */
72 # undef HAVE_GETHOSTBYNAME_R
74 # if defined(HAVE_GETHOSTBYADDR_R) && \
75 (GETHOSTBYADDR_R_NARGS < 7) || (8 < GETHOSTBYADDR_R_NARGS)
76 /* Don't know how to handle this version, pretend it's not there */
77 # undef HAVE_GETHOSTBYADDR_R
79 #endif /* LDAP_R_COMPILE */
81 char *ldap_pvt_ctime( const time_t *tp, char *buf )
84 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
85 # error "CTIME_R_NARGS should be 2 or 3"
86 # elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
87 return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
88 # elif CTIME_R_NARGS > 2
89 return ctime_r(tp,buf,26);
91 return ctime_r(tp,buf);
96 # ifdef LDAP_R_COMPILE
97 ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
100 AC_MEMCPY( buf, ctime(tp), 26 );
102 # ifdef LDAP_R_COMPILE
103 ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
110 #define BUFSTART (1024-32)
111 #define BUFMAX (32*1024-32)
113 #if defined(LDAP_R_COMPILE)
114 static char *safe_realloc( char **buf, int len );
116 #if !(defined(HAVE_GETHOSTBYNAME_R) && defined(HAVE_GETHOSTBYADDR_R))
117 static int copy_hostent( struct hostent *res,
118 char **buf, struct hostent * src );
122 int ldap_pvt_gethostbyname_a(
124 struct hostent *resbuf,
126 struct hostent **result,
129 #if defined( HAVE_GETHOSTBYNAME_R )
131 # define NEED_SAFE_REALLOC 1
135 for(;buflen<BUFMAX;) {
136 if (safe_realloc( buf, buflen )==NULL)
139 #if (GETHOSTBYNAME_R_NARGS < 6)
140 *result=gethostbyname_r( name, resbuf, *buf, buflen, herrno_ptr );
141 r = (*result == NULL) ? -1 : 0;
143 r = gethostbyname_r( name, resbuf, *buf,
144 buflen, result, herrno_ptr );
147 Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
150 #ifdef NETDB_INTERNAL
152 (*herrno_ptr==NETDB_INTERNAL) &&
162 #elif defined( LDAP_R_COMPILE )
163 # define NEED_COPY_HOSTENT
168 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
170 he = gethostbyname( name );
173 *herrno_ptr = h_errno;
175 } else if (copy_hostent( resbuf, buf, he )<0) {
183 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
188 *result = gethostbyname( name );
194 *herrno_ptr = h_errno;
200 #if !defined( HAVE_GETNAMEINFO ) && !defined( HAVE_HSTRERROR )
202 hp_strerror( int err )
205 case HOST_NOT_FOUND: return _("Host not found (authoritative)");
206 case TRY_AGAIN: return _("Host not found (server fail?)");
207 case NO_RECOVERY: return _("Non-recoverable failure");
208 case NO_DATA: return _("No data of requested type");
209 #ifdef NETDB_INTERNAL
210 case NETDB_INTERNAL: return STRERROR( errno );
213 return _("Unknown resolver error");
217 int ldap_pvt_get_hname(
218 const struct sockaddr *sa,
225 #if defined( HAVE_GETNAMEINFO )
227 #if defined( LDAP_R_COMPILE )
228 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
230 rc = getnameinfo( sa, len, name, namelen, NULL, 0, 0 );
231 #if defined( LDAP_R_COMPILE )
232 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
234 if ( rc ) *err = (char *)AC_GAI_STRERROR( rc );
237 #else /* !HAVE_GETNAMEINFO */
240 struct hostent *hp = NULL;
241 #ifdef HAVE_GETHOSTBYADDR_R
243 int buflen=BUFSTART, h_errno;
248 if (sa->sa_family == AF_INET6) {
249 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)sa;
250 addr = (char *)&sin->sin6_addr;
251 alen = sizeof(sin->sin6_addr);
254 if (sa->sa_family == AF_INET) {
255 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
256 addr = (char *)&sin->sin_addr;
257 alen = sizeof(sin->sin_addr);
260 *err = (char *)HSTRERROR( rc );
263 #if defined( HAVE_GETHOSTBYADDR_R )
264 for(;buflen<BUFMAX;) {
265 if (safe_realloc( &buf, buflen )==NULL) {
266 *err = (char *)STRERROR( ENOMEM );
269 #if (GETHOSTBYADDR_R_NARGS < 8)
270 hp=gethostbyaddr_r( addr, alen, sa->sa_family,
271 &hb, buf, buflen, &h_errno );
272 rc = (hp == NULL) ? -1 : 0;
274 rc = gethostbyaddr_r( addr, alen, sa->sa_family,
278 #ifdef NETDB_INTERNAL
280 (h_errno==NETDB_INTERNAL) &&
290 strncpy( name, hp->h_name, namelen );
292 *err = (char *)HSTRERROR( h_errno );
295 #else /* HAVE_GETHOSTBYADDR_R */
297 #if defined( LDAP_R_COMPILE )
298 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
300 hp = gethostbyaddr( addr, alen, sa->sa_family );
302 strncpy( name, hp->h_name, namelen );
306 *err = (char *)HSTRERROR( h_errno );
308 #if defined( LDAP_R_COMPILE )
309 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
312 #endif /* !HAVE_GETHOSTBYADDR_R */
314 #endif /* !HAVE_GETNAMEINFO */
317 int ldap_pvt_gethostbyaddr_a(
321 struct hostent *resbuf,
323 struct hostent **result,
326 #if defined( HAVE_GETHOSTBYADDR_R )
328 # undef NEED_SAFE_REALLOC
329 # define NEED_SAFE_REALLOC
333 for(;buflen<BUFMAX;) {
334 if (safe_realloc( buf, buflen )==NULL)
336 #if (GETHOSTBYADDR_R_NARGS < 8)
337 *result=gethostbyaddr_r( addr, len, type,
338 resbuf, *buf, buflen, herrno_ptr );
339 r = (*result == NULL) ? -1 : 0;
341 r = gethostbyaddr_r( addr, len, type,
342 resbuf, *buf, buflen,
343 result, herrno_ptr );
346 #ifdef NETDB_INTERNAL
348 (*herrno_ptr==NETDB_INTERNAL) &&
358 #elif defined( LDAP_R_COMPILE )
359 # undef NEED_COPY_HOSTENT
360 # define NEED_COPY_HOSTENT
365 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
367 he = gethostbyaddr( addr, len, type );
370 *herrno_ptr = h_errno;
372 } else if (copy_hostent( resbuf, buf, he )<0) {
380 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
384 #else /* gethostbyaddr() */
386 *result = gethostbyaddr( addr, len, type );
395 * ldap_int_utils_init() should be called before any other function.
398 void ldap_int_utils_init( void )
405 #ifdef LDAP_R_COMPILE
406 #if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
407 ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
409 ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
411 #ifdef HAVE_CYRUS_SASL
412 ldap_pvt_thread_mutex_init( &ldap_int_sasl_mutex );
415 ldap_pvt_thread_mutex_init( &ldap_int_gssapi_mutex );
419 /* call other module init functions here... */
422 #if defined( NEED_COPY_HOSTENT )
423 # undef NEED_SAFE_REALLOC
424 #define NEED_SAFE_REALLOC
426 static char *cpy_aliases(
433 for( ; (*src) ; src++ ) {
434 len = strlen( *src ) + 1;
435 AC_MEMCPY( buf, *src, len );
443 static char *cpy_addresses(
450 for( ; (*src) ; src++ ) {
451 AC_MEMCPY( buf, *src, len );
459 static int copy_hostent(
462 struct hostent * src )
469 int total_alias_len=0;
471 int total_addr_len=0;
474 /* calculate the size needed for the buffer */
475 name_len = strlen( src->h_name ) + 1;
477 if( src->h_aliases != NULL ) {
478 for( p = src->h_aliases; (*p) != NULL; p++ ) {
479 total_alias_len += strlen( *p ) + 1;
484 if( src->h_addr_list != NULL ) {
485 for( p = src->h_addr_list; (*p) != NULL; p++ ) {
488 total_addr_len = n_addr * src->h_length;
491 total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
492 total_addr_len + total_alias_len + name_len;
494 if (safe_realloc( buf, total_len )) {
496 tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
497 AC_MEMCPY( res, src, sizeof( struct hostent ) );
498 /* first the name... */
499 AC_MEMCPY( tbuf, src->h_name, name_len );
500 res->h_name = tbuf; tbuf+=name_len;
501 /* now the aliases */
503 if ( src->h_aliases != NULL ) {
504 tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
507 /* finally the addresses */
508 res->h_addr_list = tp;
509 if ( src->h_addr_list != NULL ) {
510 tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
519 #if defined( NEED_SAFE_REALLOC )
520 static char *safe_realloc( char **buf, int len )
523 tmpbuf = LDAP_REALLOC( *buf, len );
531 char * ldap_pvt_get_fqdn( char *name )
534 char hostbuf[MAXHOSTNAMELEN+1];
535 struct hostent *hp, he_buf;
536 int rc, local_h_errno;
539 if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
540 hostbuf[MAXHOSTNAMELEN] = '\0';
547 rc = ldap_pvt_gethostbyname_a( name,
548 &he_buf, &ha_buf, &hp, &local_h_errno );
550 if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
551 fqdn = LDAP_STRDUP( name );
553 fqdn = LDAP_STRDUP( hp->h_name );
560 #if ( defined( HAVE_GETADDRINFO ) || defined( HAVE_GETNAMEINFO ) ) \
561 && !defined( HAVE_GAI_STRERROR )
562 char *ldap_pvt_gai_strerror (int code) {
567 #ifdef EAI_ADDRFAMILY
568 { EAI_ADDRFAMILY, N_("Address family for hostname not supported") },
570 { EAI_AGAIN, N_("Temporary failure in name resolution") },
571 { EAI_BADFLAGS, N_("Bad value for ai_flags") },
572 { EAI_FAIL, N_("Non-recoverable failure in name resolution") },
573 { EAI_FAMILY, N_("ai_family not supported") },
574 { EAI_MEMORY, N_("Memory allocation failure") },
576 { EAI_NODATA, N_("No address associated with hostname") },
578 { EAI_NONAME, N_("Name or service not known") },
579 { EAI_SERVICE, N_("Servname not supported for ai_socktype") },
580 { EAI_SOCKTYPE, N_("ai_socktype not supported") },
581 { EAI_SYSTEM, N_("System error") },
587 for ( i = 0; values[i].msg != NULL; i++ ) {
588 if ( values[i].code == code ) {
589 return (char *) _(values[i].msg);
593 return _("Unknown error");