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>
32 #include <ac/unistd.h>
36 #if defined( LDAP_R_COMPILE )
37 # include <ldap_pvt_thread.h>
39 # undef HAVE_REENTRANT_FUNCTIONS
42 #if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
43 && defined( CTIME_R_NARGS )
47 #if defined(HAVE_GETHOSTBYNAME_R) && \
48 (GETHOSTBYNAME_R_NARGS > 6 || GETHOSTBYNAME_R_NARGS < 5)
49 /* Don't know how to handle this version, pretend it's not there */
50 # undef HAVE_GETHOSTBYNAME_R
52 #if defined(HAVE_GETHOSTBYADDR_R) && \
53 (GETHOSTBYADDR_R_NARGS > 8 || GETHOSTBYADDR_R_NARGS < 7)
54 /* Don't know how to handle this version, pretend it's not there */
55 # undef HAVE_GETHOSTBYADDR_R
60 static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
62 # if !defined( HAVE_GETHOSTBYNAME_R ) || !defined( HAVE_GETHOSTBYADDR_R )
63 static ldap_pvt_thread_mutex_t ldap_int_gethostby_mutex;
65 # ifdef HAVE_RES_QUERY
66 ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
68 #endif /* LDAP_R_COMPILE */
70 char *ldap_pvt_ctime( const time_t *tp, char *buf )
73 # if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
74 # error "CTIME_R_NARGS should be 2 or 3"
75 # elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
76 return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
77 # elif CTIME_R_NARGS > 2
78 return ctime_r(tp,buf,26);
80 return ctime_r(tp,buf);
84 # ifdef LDAP_R_COMPILE
85 ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
87 AC_MEMCPY( buf, ctime(tp), 26 );
88 # ifdef LDAP_R_COMPILE
89 ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
96 #define BUFMAX (32*1024)
98 #if defined( NEED_SAFE_REALLOC )
99 static char *safe_realloc( char **buf, int len );
102 #if !defined(HAVE_GETHOSTBYNAME_R) && defined(LDAP_R_COMPILE)
103 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src );
106 int ldap_pvt_gethostbyname_a(
108 struct hostent *resbuf,
110 struct hostent **result,
113 #if defined( HAVE_GETHOSTBYNAME_R )
115 # define NEED_SAFE_REALLOC 1
119 for(;buflen<BUFMAX;) {
120 if (safe_realloc( buf, buflen )==NULL)
123 #if (GETHOSTBYNAME_R_NARGS < 6)
124 r = ((*result=gethostbyname_r( name, resbuf, *buf,
125 buflen, herrno_ptr ))== NULL) ?
128 r = gethostbyname_r( name, resbuf, *buf,
129 buflen, result, herrno_ptr );
132 Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
135 #ifdef NETDB_INTERNAL
137 (*herrno_ptr==NETDB_INTERNAL) &&
147 #elif defined( LDAP_R_COMPILE )
148 # define NEED_COPY_HOSTENT
153 ldap_pvt_thread_mutex_lock( &ldap_int_gethostby_mutex );
155 he = gethostbyname( name );
158 *herrno_ptr = h_errno;
160 } else if (copy_hostent( resbuf, buf, he )<0) {
168 ldap_pvt_thread_mutex_unlock( &ldap_int_gethostby_mutex );
173 *result = gethostbyname( name );
179 *herrno_ptr = h_errno;
185 int ldap_pvt_gethostbyaddr_a(
189 struct hostent *resbuf,
191 struct hostent **result,
194 #if defined( HAVE_GETHOSTBYADDR_R )
196 # undef NEED_SAFE_REALLOC
197 # define NEED_SAFE_REALLOC
201 for(;buflen<BUFMAX;) {
202 if (safe_realloc( buf, buflen )==NULL)
204 #if (GETHOSTBYADDR_R_NARGS < 8)
205 r = ((*result=gethostbyaddr_r( addr, len, type,
206 resbuf, *buf, buflen,
207 herrno_ptr )) == NULL) ?
210 r = gethostbyaddr_r( addr, len, type,
211 resbuf, *buf, buflen,
212 result, herrno_ptr );
215 #ifdef NETDB_INTERNAL
217 (*herrno_ptr==NETDB_INTERNAL) &&
227 #elif defined( LDAP_R_COMPILE )
228 # undef NEED_COPY_HOSTENT
229 # define NEED_COPY_HOSTENT
234 ldap_pvt_thread_mutex_lock( &ldap_int_gethostby_mutex );
236 he = gethostbyaddr( addr, len, type );
239 *herrno_ptr = h_errno;
241 } else if (copy_hostent( resbuf, buf, he )<0) {
249 ldap_pvt_thread_mutex_unlock( &ldap_int_gethostby_mutex );
252 #else /* gethostbyaddr() */
254 *result = gethostbyaddr( addr, len, type );
263 * ldap_int_utils_init() should be called before any other function.
266 void ldap_int_utils_init( void )
273 #ifdef LDAP_R_COMPILE
275 #if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
276 ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
279 #if !defined( HAVE_GETHOSTBYNAME_R ) || !defined( HAVE_GETHOSTBYADDR_R )
280 ldap_pvt_thread_mutex_init( &ldap_int_gethostby_mutex );
283 #ifdef HAVE_RES_QUERY
284 ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
287 /* call other module init functions here... */
291 #if defined( NEED_COPY_HOSTENT )
292 # undef NEED_SAFE_REALLOC
293 #define NEED_SAFE_REALLOC
295 static char *cpy_aliases( char ***tgtio, char *buf, char **src )
299 for( ; (*src) ; src++ ) {
300 len = strlen( *src ) + 1;
301 AC_MEMCPY( buf, *src, len );
309 static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
312 for( ; (*src) ; src++ ) {
313 AC_MEMCPY( buf, *src, len );
321 static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
328 int total_alias_len=0;
333 /* calculate the size needed for the buffer */
334 name_len = strlen( src->h_name ) + 1;
336 if( src->h_aliases != NULL ) {
337 for( p = src->h_aliases; (*p) != NULL; p++ ) {
338 total_alias_len += strlen( *p ) + 1;
343 if( src->h_addr_list != NULL ) {
344 for( p = src->h_addr_list; (*p) != NULL; p++ ) {
347 total_addr_len = n_addr * src->h_length;
350 total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
351 total_addr_len + total_alias_len + name_len;
353 if (safe_realloc( buf, total_len )) {
355 tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
356 AC_MEMCPY( res, src, sizeof( struct hostent ) );
357 /* first the name... */
358 AC_MEMCPY( tbuf, src->h_name, name_len );
359 res->h_name = tbuf; tbuf+=name_len;
360 /* now the aliases */
362 if ( src->h_aliases != NULL ) {
363 tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
366 /* finally the addresses */
367 res->h_addr_list = tp;
368 if ( src->h_addr_list != NULL ) {
369 tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
378 #if defined( NEED_SAFE_REALLOC )
379 static char *safe_realloc( char **buf, int len )
382 tmpbuf = LDAP_REALLOC( *buf, len );
390 char * ldap_pvt_get_fqdn( char *name )
393 char hostbuf[MAXHOSTNAMELEN+1];
394 struct hostent *hp, he_buf;
395 int rc, local_h_errno;
398 if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
399 hostbuf[MAXHOSTNAMELEN] = '\0';
406 rc = ldap_pvt_gethostbyname_a( name,
407 &he_buf, &ha_buf, &hp, &local_h_errno );
409 if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
410 fqdn = LDAP_STRDUP( name );
412 fqdn = LDAP_STRDUP( hp->h_name );
419 #if defined( HAVE_GETADDRINFO ) && !defined( HAVE_GAI_STRERROR )
420 char *ldap_pvt_gai_strerror (int code) {
425 #ifdef EAI_ADDRFAMILY
426 { EAI_ADDRFAMILY, "Address family for hostname not supported" },
428 { EAI_AGAIN, "Temporary failure in name resolution" },
429 { EAI_BADFLAGS, "Bad value for ai_flags" },
430 { EAI_FAIL, "Non-recoverable failure in name resolution" },
431 { EAI_FAMILY, "ai_family not supported" },
432 { EAI_MEMORY, "Memory allocation failure" },
434 { EAI_NODATA, "No address associated with hostname" },
436 { EAI_NONAME, "Name or service not known" },
437 { EAI_SERVICE, "Servname not supported for ai_socktype" },
438 { EAI_SOCKTYPE, "ai_socktype not supported" },
439 { EAI_SYSTEM, "System error" },
445 for ( i = 0; values[i].msg != NULL; i++ ) {
446 if ( values[i].code == code ) {
447 return (char *) values[i].msg;
451 return "Unknown error";