3 * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
4 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
7 * util-int.c Various functions to replace missing threadsafe ones.
8 * Without the real *_r funcs, things will
9 * work, but might not be threadsafe.
11 * Written by Bart Hartgers.
13 * Copyright 1998, A. Hartgers, All rights reserved.
14 * This software is not subject to any license of Eindhoven University of
15 * Technology, since it was written in my spare time.
17 * Redistribution and use in source and binary forms are permitted only
18 * as authorized by the OpenLDAP Public License. A copy of this
19 * license is available at http://www.OpenLDAP.org/license.html or
20 * in file LICENSE in the top-level directory of the distribution.
26 #include <ac/stdlib.h>
29 #include <ac/socket.h>
30 #include <ac/string.h>
32 #include <ac/unistd.h>
36 #ifndef LDAP_R_COMPILE
37 # undef HAVE_REENTRANT_FUNCTIONS
39 # undef HAVE_GETHOSTBYNAME_R
40 # undef HAVE_GETHOSTBYADDR_R
43 # include <ldap_pvt_thread.h>
44 ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
46 #if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
47 && defined( CTIME_R_NARGS )
50 static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
53 # if defined(HAVE_GETHOSTBYNAME_R) && \
54 (GETHOSTBYNAME_R_NARGS < 5) || (6 < GETHOSTBYNAME_R_NARGS)
55 /* Don't know how to handle this version, pretend it's not there */
56 # undef HAVE_GETHOSTBYNAME_R
58 # if defined(HAVE_GETHOSTBYADDR_R) && \
59 (GETHOSTBYADDR_R_NARGS < 7) || (8 < GETHOSTBYADDR_R_NARGS)
60 /* Don't know how to handle this version, pretend it's not there */
61 # undef HAVE_GETHOSTBYADDR_R
63 #endif /* LDAP_R_COMPILE */
65 char *ldap_pvt_ctime( const time_t *tp, char *buf )
68 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
69 # error "CTIME_R_NARGS should be 2 or 3"
70 # elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
71 return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
72 # elif CTIME_R_NARGS > 2
73 return ctime_r(tp,buf,26);
75 return ctime_r(tp,buf);
80 # ifdef LDAP_R_COMPILE
81 ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
84 AC_MEMCPY( buf, ctime(tp), 26 );
86 # ifdef LDAP_R_COMPILE
87 ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
94 #define BUFSTART (1024-32)
95 #define BUFMAX (32*1024-32)
97 static char *safe_realloc( char **buf, int len );
99 #if !defined(HAVE_GETHOSTBYNAME_R) && defined(LDAP_R_COMPILE)
100 static int copy_hostent( struct hostent *res,
101 char **buf, struct hostent * src );
104 int ldap_pvt_gethostbyname_a(
106 struct hostent *resbuf,
108 struct hostent **result,
111 #if defined( HAVE_GETHOSTBYNAME_R )
113 # define NEED_SAFE_REALLOC 1
117 for(;buflen<BUFMAX;) {
118 if (safe_realloc( buf, buflen )==NULL)
121 #if (GETHOSTBYNAME_R_NARGS < 6)
122 *result=gethostbyname_r( name, resbuf, *buf, buflen, herrno_ptr );
123 r = (*result == NULL) ? -1 : 0;
125 r = gethostbyname_r( name, resbuf, *buf,
126 buflen, result, herrno_ptr );
129 Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
132 #ifdef NETDB_INTERNAL
134 (*herrno_ptr==NETDB_INTERNAL) &&
144 #elif defined( LDAP_R_COMPILE )
145 # define NEED_COPY_HOSTENT
150 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
152 he = gethostbyname( name );
155 *herrno_ptr = h_errno;
157 } else if (copy_hostent( resbuf, buf, he )<0) {
165 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
170 *result = gethostbyname( name );
176 *herrno_ptr = h_errno;
184 hp_strerror( int err )
187 case HOST_NOT_FOUND: return "Host not found (authoritative)";
188 case TRY_AGAIN: return "Host not found (server fail?)";
189 case NO_RECOVERY: return "Non-recoverable failure";
190 case NO_DATA: return "No data of requested type";
191 #ifdef NETDB_INTERNAL
192 case NETDB_INTERNAL: return STRERROR( errno );
196 return "Unknown resolver error";
200 int ldap_pvt_get_hname(
201 const struct sockaddr *sa,
208 #if defined( HAVE_GETNAMEINFO )
210 #if defined( LDAP_R_COMPILE )
211 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
213 rc = getnameinfo( sa, len, name, namelen, NULL, 0, 0 );
214 #if defined( LDAP_R_COMPILE )
215 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
217 if ( rc ) *err = AC_GAI_STRERROR( rc );
220 #else /* !HAVE_GETNAMEINFO */
223 struct hostent *hp = NULL;
224 #ifdef HAVE_GETHOSTBYADDR_R
226 int buflen=BUFSTART, h_errno;
231 if (sa->sa_family == AF_INET6) {
232 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)sa;
233 addr = (char *)&sin->sin6_addr;
234 alen = sizeof(sin->sin6_addr);
237 if (sa->sa_family == AF_INET) {
238 struct sockaddr_in *sin = (struct sockaddr_in *)sa;
239 addr = (char *)&sin->sin_addr;
240 alen = sizeof(sin->sin_addr);
243 *err = hp_strerror( rc );
246 #if defined( HAVE_GETHOSTBYADDR_R )
247 for(;buflen<BUFMAX;) {
248 if (safe_realloc( &buf, buflen )==NULL) {
249 *err = STRERROR( ENOMEM );
252 #if (GETHOSTBYADDR_R_NARGS < 8)
253 hp=gethostbyaddr_r( addr, alen, sa->sa_family,
254 &hb, buf, buflen, &h_errno );
255 rc = (hp == NULL) ? -1 : 0;
257 rc = gethostbyaddr_r( addr, alen, sa->sa_family,
261 #ifdef NETDB_INTERNAL
263 (h_errno==NETDB_INTERNAL) &&
273 strncpy( name, hp->h_name, namelen );
275 *err = hp_strerror( h_errno );
278 #else /* HAVE_GETHOSTBYADDR_R */
280 #if defined( LDAP_R_COMPILE )
281 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
283 hp = gethostbyaddr( addr, alen, sa->sa_family );
285 strncpy( name, hp->h_name, namelen );
289 *err = hp_strerror( h_errno );
291 #if defined( LDAP_R_COMPILE )
292 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
295 #endif /* !HAVE_GETHOSTBYADDR_R */
297 #endif /* !HAVE_GETNAMEINFO */
300 int ldap_pvt_gethostbyaddr_a(
304 struct hostent *resbuf,
306 struct hostent **result,
309 #if defined( HAVE_GETHOSTBYADDR_R )
311 # undef NEED_SAFE_REALLOC
312 # define NEED_SAFE_REALLOC
316 for(;buflen<BUFMAX;) {
317 if (safe_realloc( buf, buflen )==NULL)
319 #if (GETHOSTBYADDR_R_NARGS < 8)
320 *result=gethostbyaddr_r( addr, len, type,
321 resbuf, *buf, buflen, herrno_ptr );
322 r = (*result == NULL) ? -1 : 0;
324 r = gethostbyaddr_r( addr, len, type,
325 resbuf, *buf, buflen,
326 result, herrno_ptr );
329 #ifdef NETDB_INTERNAL
331 (*herrno_ptr==NETDB_INTERNAL) &&
341 #elif defined( LDAP_R_COMPILE )
342 # undef NEED_COPY_HOSTENT
343 # define NEED_COPY_HOSTENT
348 ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
350 he = gethostbyaddr( addr, len, type );
353 *herrno_ptr = h_errno;
355 } else if (copy_hostent( resbuf, buf, he )<0) {
363 ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
367 #else /* gethostbyaddr() */
369 *result = gethostbyaddr( addr, len, type );
378 * ldap_int_utils_init() should be called before any other function.
381 void ldap_int_utils_init( void )
388 #ifdef LDAP_R_COMPILE
389 #if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
390 ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
392 ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
395 /* call other module init functions here... */
398 #if defined( NEED_COPY_HOSTENT )
399 # undef NEED_SAFE_REALLOC
400 #define NEED_SAFE_REALLOC
402 static char *cpy_aliases(
409 for( ; (*src) ; src++ ) {
410 len = strlen( *src ) + 1;
411 AC_MEMCPY( buf, *src, len );
419 static char *cpy_addresses(
426 for( ; (*src) ; src++ ) {
427 AC_MEMCPY( buf, *src, len );
435 static int copy_hostent(
438 struct hostent * src )
445 int total_alias_len=0;
450 /* calculate the size needed for the buffer */
451 name_len = strlen( src->h_name ) + 1;
453 if( src->h_aliases != NULL ) {
454 for( p = src->h_aliases; (*p) != NULL; p++ ) {
455 total_alias_len += strlen( *p ) + 1;
460 if( src->h_addr_list != NULL ) {
461 for( p = src->h_addr_list; (*p) != NULL; p++ ) {
464 total_addr_len = n_addr * src->h_length;
467 total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
468 total_addr_len + total_alias_len + name_len;
470 if (safe_realloc( buf, total_len )) {
472 tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
473 AC_MEMCPY( res, src, sizeof( struct hostent ) );
474 /* first the name... */
475 AC_MEMCPY( tbuf, src->h_name, name_len );
476 res->h_name = tbuf; tbuf+=name_len;
477 /* now the aliases */
479 if ( src->h_aliases != NULL ) {
480 tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
483 /* finally the addresses */
484 res->h_addr_list = tp;
485 if ( src->h_addr_list != NULL ) {
486 tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
495 #if defined( NEED_SAFE_REALLOC )
496 static char *safe_realloc( char **buf, int len )
499 tmpbuf = LDAP_REALLOC( *buf, len );
507 char * ldap_pvt_get_fqdn( char *name )
510 char hostbuf[MAXHOSTNAMELEN+1];
511 struct hostent *hp, he_buf;
512 int rc, local_h_errno;
515 if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
516 hostbuf[MAXHOSTNAMELEN] = '\0';
523 rc = ldap_pvt_gethostbyname_a( name,
524 &he_buf, &ha_buf, &hp, &local_h_errno );
526 if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
527 fqdn = LDAP_STRDUP( name );
529 fqdn = LDAP_STRDUP( hp->h_name );
536 #if defined( HAVE_GETADDRINFO ) && !defined( HAVE_GAI_STRERROR )
537 char *ldap_pvt_gai_strerror (int code) {
542 #ifdef EAI_ADDRFAMILY
543 { EAI_ADDRFAMILY, "Address family for hostname not supported" },
545 { EAI_AGAIN, "Temporary failure in name resolution" },
546 { EAI_BADFLAGS, "Bad value for ai_flags" },
547 { EAI_FAIL, "Non-recoverable failure in name resolution" },
548 { EAI_FAMILY, "ai_family not supported" },
549 { EAI_MEMORY, "Memory allocation failure" },
551 { EAI_NODATA, "No address associated with hostname" },
553 { EAI_NONAME, "Name or service not known" },
554 { EAI_SERVICE, "Servname not supported for ai_socktype" },
555 { EAI_SOCKTYPE, "ai_socktype not supported" },
556 { EAI_SYSTEM, "System error" },
562 for ( i = 0; values[i].msg != NULL; i++ ) {
563 if ( values[i].code == code ) {
564 return (char *) values[i].msg;
568 return "Unknown error";