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 # ifndef HAVE_GETHOSTBYNAME_R
62 static ldap_pvt_thread_mutex_t ldap_int_gethostbyname_mutex;
64 # ifndef HAVE_GETHOSTBYADDR_R
65 static ldap_pvt_thread_mutex_t ldap_int_gethostbyaddr_mutex;
67 # ifdef HAVE_RES_QUERY
68 ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
70 #endif /* LDAP_R_COMPILE */
72 char *ldap_pvt_ctime( const time_t *tp, char *buf )
75 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
76 # error "CTIME_R_NARGS should be 2 or 3"
77 # elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
78 return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
79 # elif CTIME_R_NARGS > 2
80 return ctime_r(tp,buf,26);
82 return ctime_r(tp,buf);
86 # ifdef LDAP_R_COMPILE
87 ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
89 memcpy( buf, ctime(tp), 26 );
90 # ifdef LDAP_R_COMPILE
91 ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
98 #define BUFMAX (32*1024)
100 static char *safe_realloc( char **buf, int len );
101 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src );
103 int ldap_pvt_gethostbyname_a(
105 struct hostent *resbuf,
107 struct hostent **result,
110 #if defined( HAVE_GETHOSTBYNAME_R )
112 # define NEED_SAFE_REALLOC 1
116 for(;buflen<BUFMAX;) {
117 if (safe_realloc( buf, buflen )==NULL)
120 #if (GETHOSTBYNAME_R_NARGS < 6)
121 r = ((*result=gethostbyname_r( name, resbuf, *buf,
122 buflen, herrno_ptr ))== NULL) ?
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
149 ldap_pvt_thread_mutex_lock( &ldap_int_gethostbyname_mutex );
151 he = gethostbyname( name );
154 *herrno_ptr = h_errno;
156 } else if (copy_hostent( resbuf, buf, he )<0) {
164 ldap_pvt_thread_mutex_unlock( &ldap_int_gethostbyname_mutex );
168 *result = gethostbyname( name );
174 *herrno_ptr = h_errno;
180 int ldap_pvt_gethostbyaddr_a(
184 struct hostent *resbuf,
186 struct hostent **result,
189 #if defined( HAVE_GETHOSTBYADDR_R )
191 # undef NEED_SAFE_REALLOC
192 # define NEED_SAFE_REALLOC
196 for(;buflen<BUFMAX;) {
197 if (safe_realloc( buf, buflen )==NULL)
199 #if (GETHOSTBYADDR_R_NARGS < 8)
200 r = ((*result=gethostbyaddr_r( addr, len, type,
201 resbuf, *buf, buflen,
202 herrno_ptr )) == NULL) ?
205 r = gethostbyaddr_r( addr, len, type,
206 resbuf, *buf, buflen,
207 result, herrno_ptr );
210 #ifdef NETDB_INTERNAL
212 (*herrno_ptr==NETDB_INTERNAL) &&
222 #elif defined( LDAP_R_COMPILE )
223 # undef NEED_COPY_HOSTENT
224 # define NEED_COPY_HOSTENT
228 ldap_pvt_thread_mutex_lock( &ldap_int_gethostbyaddr_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_gethostbyaddr_mutex );
246 #else /* gethostbyaddr() */
247 *result = gethostbyaddr( addr, len, type );
256 * ldap_int_utils_init() should be called before any other function.
259 void ldap_int_utils_init( void )
266 #ifdef LDAP_R_COMPILE
268 #if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
269 ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
272 #if !defined( HAVE_GETHOSTBYNAME_R )
273 ldap_pvt_thread_mutex_init( &ldap_int_gethostbyname_mutex );
276 #if !defined( HAVE_GETHOSTBYADDR_R )
277 ldap_pvt_thread_mutex_init( &ldap_int_gethostbyaddr_mutex );
280 #ifdef HAVE_RES_QUERY
281 ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
284 /* call other module init functions here... */
288 #if defined( NEED_COPY_HOSTENT )
289 # undef NEED_SAFE_REALLOC
290 #define NEED_SAFE_REALLOC
292 static char *cpy_aliases( char ***tgtio, char *buf, char **src )
296 for( ; (*src) ; src++ ) {
297 len = strlen( *src ) + 1;
298 memcpy( buf, *src, len );
306 static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
309 for( ; (*src) ; src++ ) {
310 memcpy( buf, *src, len );
318 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
325 int total_alias_len=0;
330 /* calculate the size needed for the buffer */
331 name_len = strlen( src->h_name ) + 1;
333 if( src->h_aliases != NULL ) {
334 for( p = src->h_aliases; (*p) != NULL; p++ ) {
335 total_alias_len += strlen( *p ) + 1;
340 if( src->h_addr_list != NULL ) {
341 for( p = src->h_addr_list; (*p) != NULL; p++ ) {
344 total_addr_len = n_addr * src->h_length;
347 total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
348 total_addr_len + total_alias_len + name_len;
350 if (safe_realloc( buf, total_len )) {
352 tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
353 memcpy( res, src, sizeof( struct hostent ) );
354 /* first the name... */
355 memcpy( tbuf, src->h_name, name_len );
356 res->h_name = tbuf; tbuf+=name_len;
357 /* now the aliases */
359 if ( src->h_aliases != NULL ) {
360 tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
363 /* finally the addresses */
364 res->h_addr_list = tp;
365 if ( src->h_addr_list != NULL ) {
366 tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
375 #if defined( NEED_SAFE_REALLOC )
376 static char *safe_realloc( char **buf, int len )
379 tmpbuf = LDAP_REALLOC( *buf, len );