3 * Copyright 1998-2000 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>
35 #if defined( LDAP_R_COMPILE )
36 # include <ldap_pvt_thread.h>
38 # undef HAVE_REENTRANT_FUNCTIONS
41 #if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
42 && defined( CTIME_R_NARGS )
46 #if defined(HAVE_GETHOSTBYNAME_R) && \
47 (GETHOSTBYNAME_R_NARGS > 6 || GETHOSTBYNAME_R_NARGS < 5)
48 /* Don't know how to handle this version, pretend it's not there */
49 # undef HAVE_GETHOSTBYNAME_R
51 #if defined(HAVE_GETHOSTBYADDR_R) && \
52 (GETHOSTBYADDR_R_NARGS > 8 || GETHOSTBYADDR_R_NARGS < 7)
53 /* Don't know how to handle this version, pretend it's not there */
54 # undef HAVE_GETHOSTBYADDR_R
59 static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
61 # if !defined( HAVE_GETHOSTBYNAME_R ) || !defined( HAVE_GETHOSTBYADDR_R )
62 static ldap_pvt_thread_mutex_t ldap_int_gethostby_mutex;
64 # ifdef HAVE_RES_QUERY
65 ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
67 #endif /* LDAP_R_COMPILE */
69 char *ldap_pvt_ctime( const time_t *tp, char *buf )
72 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
73 # error "CTIME_R_NARGS should be 2 or 3"
74 # elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
75 return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
76 # elif CTIME_R_NARGS > 2
77 return ctime_r(tp,buf,26);
79 return ctime_r(tp,buf);
83 # ifdef LDAP_R_COMPILE
84 ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
86 AC_MEMCPY( buf, ctime(tp), 26 );
87 # ifdef LDAP_R_COMPILE
88 ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
95 #define BUFMAX (32*1024)
97 static char *safe_realloc( char **buf, int len );
98 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src );
100 int ldap_pvt_gethostbyname_a(
102 struct hostent *resbuf,
104 struct hostent **result,
107 #if defined( HAVE_GETHOSTBYNAME_R )
109 # define NEED_SAFE_REALLOC 1
113 for(;buflen<BUFMAX;) {
114 if (safe_realloc( buf, buflen )==NULL)
117 #if (GETHOSTBYNAME_R_NARGS < 6)
118 r = ((*result=gethostbyname_r( name, resbuf, *buf,
119 buflen, herrno_ptr ))== NULL) ?
122 r = gethostbyname_r( name, resbuf, *buf,
123 buflen, result, herrno_ptr );
126 Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
129 #ifdef NETDB_INTERNAL
131 (*herrno_ptr==NETDB_INTERNAL) &&
141 #elif defined( LDAP_R_COMPILE )
142 # define NEED_COPY_HOSTENT
147 ldap_pvt_thread_mutex_lock( &ldap_int_gethostby_mutex );
149 he = gethostbyname( name );
152 *herrno_ptr = h_errno;
154 } else if (copy_hostent( resbuf, buf, he )<0) {
162 ldap_pvt_thread_mutex_unlock( &ldap_int_gethostby_mutex );
167 *result = gethostbyname( name );
173 *herrno_ptr = h_errno;
179 int ldap_pvt_gethostbyaddr_a(
183 struct hostent *resbuf,
185 struct hostent **result,
188 #if defined( HAVE_GETHOSTBYADDR_R )
190 # undef NEED_SAFE_REALLOC
191 # define NEED_SAFE_REALLOC
195 for(;buflen<BUFMAX;) {
196 if (safe_realloc( buf, buflen )==NULL)
198 #if (GETHOSTBYADDR_R_NARGS < 8)
199 r = ((*result=gethostbyaddr_r( addr, len, type,
200 resbuf, *buf, buflen,
201 herrno_ptr )) == NULL) ?
204 r = gethostbyaddr_r( addr, len, type,
205 resbuf, *buf, buflen,
206 result, herrno_ptr );
209 #ifdef NETDB_INTERNAL
211 (*herrno_ptr==NETDB_INTERNAL) &&
221 #elif defined( LDAP_R_COMPILE )
222 # undef NEED_COPY_HOSTENT
223 # define NEED_COPY_HOSTENT
228 ldap_pvt_thread_mutex_lock( &ldap_int_gethostby_mutex );
230 he = gethostbyaddr( addr, len, type );
233 *herrno_ptr = h_errno;
235 } else if (copy_hostent( resbuf, buf, he )<0) {
243 ldap_pvt_thread_mutex_unlock( &ldap_int_gethostby_mutex );
246 #else /* gethostbyaddr() */
248 *result = gethostbyaddr( addr, len, type );
257 * ldap_int_utils_init() should be called before any other function.
260 void ldap_int_utils_init( void )
267 #ifdef LDAP_R_COMPILE
269 #if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
270 ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
273 #if !defined( HAVE_GETHOSTBYNAME_R ) || !defined( HAVE_GETHOSTBYADDR_R )
274 ldap_pvt_thread_mutex_init( &ldap_int_gethostby_mutex );
277 #ifdef HAVE_RES_QUERY
278 ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
281 /* call other module init functions here... */
285 #if defined( NEED_COPY_HOSTENT )
286 # undef NEED_SAFE_REALLOC
287 #define NEED_SAFE_REALLOC
289 static char *cpy_aliases( char ***tgtio, char *buf, char **src )
293 for( ; (*src) ; src++ ) {
294 len = strlen( *src ) + 1;
295 AC_MEMCPY( buf, *src, len );
303 static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
306 for( ; (*src) ; src++ ) {
307 AC_MEMCPY( buf, *src, len );
315 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
322 int total_alias_len=0;
327 /* calculate the size needed for the buffer */
328 name_len = strlen( src->h_name ) + 1;
330 if( src->h_aliases != NULL ) {
331 for( p = src->h_aliases; (*p) != NULL; p++ ) {
332 total_alias_len += strlen( *p ) + 1;
337 if( src->h_addr_list != NULL ) {
338 for( p = src->h_addr_list; (*p) != NULL; p++ ) {
341 total_addr_len = n_addr * src->h_length;
344 total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
345 total_addr_len + total_alias_len + name_len;
347 if (safe_realloc( buf, total_len )) {
349 tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
350 AC_MEMCPY( res, src, sizeof( struct hostent ) );
351 /* first the name... */
352 AC_MEMCPY( tbuf, src->h_name, name_len );
353 res->h_name = tbuf; tbuf+=name_len;
354 /* now the aliases */
356 if ( src->h_aliases != NULL ) {
357 tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
360 /* finally the addresses */
361 res->h_addr_list = tp;
362 if ( src->h_addr_list != NULL ) {
363 tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
372 #if defined( NEED_SAFE_REALLOC )
373 static char *safe_realloc( char **buf, int len )
376 tmpbuf = LDAP_REALLOC( *buf, len );
384 char * ldap_pvt_get_fqdn( char *name )
387 char hostbuf[MAXHOSTNAMELEN+1];
388 struct hostent *hp, he_buf;
389 int rc, local_h_errno;
392 if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
393 hostbuf[MAXHOSTNAMELEN] = '\0';
400 rc = ldap_pvt_gethostbyname_a( name,
401 &he_buf, &ha_buf, &hp, &local_h_errno );
403 if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
404 fqdn = LDAP_STRDUP( name );
406 fqdn = LDAP_STRDUP( hp->h_name );