--- /dev/null
+/* $OpenLDAP$ */
+/*
+ * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+/*
+ * util-int.c Various functions to replace missing threadsafe ones.
+ * Without the real *_r funcs, things will
+ * work, but might not be threadsafe.
+ *
+ * Written by Bart Hartgers.
+ *
+ * Copyright 1998, A. Hartgers, All rights reserved.
+ * This software is not subject to any license of Eindhoven University of
+ * Technology, since it was written in my spare time.
+ *
+ * Redistribution and use in source and binary forms are permitted only
+ * as authorized by the OpenLDAP Public License. A copy of this
+ * license is available at http://www.OpenLDAP.org/license.html or
+ * in file LICENSE in the top-level directory of the distribution.
+ */
+
+
+#include "portable.h"
+
+#include <ac/stdlib.h>
+
+#include <ac/errno.h>
+#include <ac/socket.h>
+#include <ac/string.h>
+#include <ac/time.h>
+#include <ac/unistd.h>
+
+#include "ldap-int.h"
+
+#if defined( LDAP_R_COMPILE )
+# include <ldap_pvt_thread.h>
+#else
+# undef HAVE_REENTRANT_FUNCTIONS
+#endif
+
+#if (defined( HAVE_CTIME_R ) || defined( HAVE_REENTRANT_FUNCTIONS)) \
+ && defined( CTIME_R_NARGS )
+# define USE_CTIME_R
+#endif
+
+#if defined(HAVE_GETHOSTBYNAME_R) && \
+ (GETHOSTBYNAME_R_NARGS > 6 || GETHOSTBYNAME_R_NARGS < 5)
+ /* Don't know how to handle this version, pretend it's not there */
+# undef HAVE_GETHOSTBYNAME_R
+#endif
+#if defined(HAVE_GETHOSTBYADDR_R) && \
+ (GETHOSTBYADDR_R_NARGS > 8 || GETHOSTBYADDR_R_NARGS < 7)
+ /* Don't know how to handle this version, pretend it's not there */
+# undef HAVE_GETHOSTBYADDR_R
+#endif
+
+#ifdef LDAP_R_COMPILE
+# ifndef USE_CTIME_R
+ static ldap_pvt_thread_mutex_t ldap_int_ctime_mutex;
+# endif
+# ifdef HAVE_RES_QUERY
+ ldap_pvt_thread_mutex_t ldap_int_resolv_mutex;
+# endif
+#endif /* LDAP_R_COMPILE */
+
+char *ldap_pvt_ctime( const time_t *tp, char *buf )
+{
+#ifdef USE_CTIME_R
+# if (CTIME_R_NARGS > 3) || (CTIME_R_NARGS < 2)
+# error "CTIME_R_NARGS should be 2 or 3"
+# elif CTIME_R_NARGS > 2 && defined(CTIME_R_RETURNS_INT)
+ return( ctime_r(tp,buf,26) < 0 ? 0 : buf );
+# elif CTIME_R_NARGS > 2
+ return ctime_r(tp,buf,26);
+# else
+ return ctime_r(tp,buf);
+# endif
+
+#else
+# ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_lock( &ldap_int_ctime_mutex );
+# endif
+ AC_MEMCPY( buf, ctime(tp), 26 );
+# ifdef LDAP_R_COMPILE
+ ldap_pvt_thread_mutex_unlock( &ldap_int_ctime_mutex );
+# endif
+ return buf;
+#endif
+}
+
+#define BUFSTART (1024-32)
+#define BUFMAX (32*1024-32)
+
+static char *safe_realloc( char **buf, int len );
+
+#if !defined(HAVE_GETHOSTBYNAME_R) && defined(LDAP_R_COMPILE)
+static int copy_hostent( struct hostent *res, char **buf, struct hostent * src );
+#endif
+
+int ldap_pvt_gethostbyname_a(
+ const char *name,
+ struct hostent *resbuf,
+ char **buf,
+ struct hostent **result,
+ int *herrno_ptr )
+{
+#if defined( HAVE_GETHOSTBYNAME_R )
+
+# define NEED_SAFE_REALLOC 1
+ int r=-1;
+ int buflen=BUFSTART;
+ *buf = NULL;
+ for(;buflen<BUFMAX;) {
+ if (safe_realloc( buf, buflen )==NULL)
+ return r;
+
+#if (GETHOSTBYNAME_R_NARGS < 6)
+ r = ((*result=gethostbyname_r( name, resbuf, *buf,
+ buflen, herrno_ptr ))== NULL) ?
+ -1 : 0;
+#else
+ r = gethostbyname_r( name, resbuf, *buf,
+ buflen, result, herrno_ptr );
+#endif
+
+ Debug( LDAP_DEBUG_TRACE, "ldap_pvt_gethostbyname_a: host=%s, r=%d\n",
+ name, r, 0 );
+
+#ifdef NETDB_INTERNAL
+ if ((r<0) &&
+ (*herrno_ptr==NETDB_INTERNAL) &&
+ (errno==ERANGE))
+ {
+ buflen*=2;
+ continue;
+ }
+#endif
+ return r;
+ }
+ return -1;
+#elif defined( LDAP_R_COMPILE )
+# define NEED_COPY_HOSTENT
+ struct hostent *he;
+ int retval;
+ *buf = NULL;
+
+ ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
+
+ he = gethostbyname( name );
+
+ if (he==NULL) {
+ *herrno_ptr = h_errno;
+ retval = -1;
+ } else if (copy_hostent( resbuf, buf, he )<0) {
+ *herrno_ptr = -1;
+ retval = -1;
+ } else {
+ *result = resbuf;
+ retval = 0;
+ }
+
+ ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
+
+ return retval;
+#else
+ *buf = NULL;
+ *result = gethostbyname( name );
+
+ if (*result!=NULL) {
+ return 0;
+ }
+
+ *herrno_ptr = h_errno;
+
+ return -1;
+#endif
+}
+
+int ldap_pvt_gethostbyaddr_a(
+ const char *addr,
+ int len,
+ int type,
+ struct hostent *resbuf,
+ char **buf,
+ struct hostent **result,
+ int *herrno_ptr )
+{
+#if defined( HAVE_GETHOSTBYADDR_R )
+
+# undef NEED_SAFE_REALLOC
+# define NEED_SAFE_REALLOC
+ int r=-1;
+ int buflen=BUFSTART;
+ *buf = NULL;
+ for(;buflen<BUFMAX;) {
+ if (safe_realloc( buf, buflen )==NULL)
+ return r;
+#if (GETHOSTBYADDR_R_NARGS < 8)
+ r = ((*result=gethostbyaddr_r( addr, len, type,
+ resbuf, *buf, buflen,
+ herrno_ptr )) == NULL) ?
+ -1 : 0;
+#else
+ r = gethostbyaddr_r( addr, len, type,
+ resbuf, *buf, buflen,
+ result, herrno_ptr );
+#endif
+
+#ifdef NETDB_INTERNAL
+ if ((r<0) &&
+ (*herrno_ptr==NETDB_INTERNAL) &&
+ (errno==ERANGE))
+ {
+ buflen*=2;
+ continue;
+ }
+#endif
+ return r;
+ }
+ return -1;
+#elif defined( LDAP_R_COMPILE )
+# undef NEED_COPY_HOSTENT
+# define NEED_COPY_HOSTENT
+ struct hostent *he;
+ int retval;
+ *buf = NULL;
+
+ ldap_pvt_thread_mutex_lock( &ldap_int_resolv_mutex );
+
+ he = gethostbyaddr( addr, len, type );
+
+ if (he==NULL) {
+ *herrno_ptr = h_errno;
+ retval = -1;
+ } else if (copy_hostent( resbuf, buf, he )<0) {
+ *herrno_ptr = -1;
+ retval = -1;
+ } else {
+ *result = resbuf;
+ retval = 0;
+ }
+
+ ldap_pvt_thread_mutex_unlock( &ldap_int_resolv_mutex );
+
+ return retval;
+#else /* gethostbyaddr() */
+ *buf = NULL;
+ *result = gethostbyaddr( addr, len, type );
+
+ if (*result!=NULL) {
+ return 0;
+ }
+ return -1;
+#endif
+}
+/*
+ * ldap_int_utils_init() should be called before any other function.
+ */
+
+void ldap_int_utils_init( void )
+{
+ static int done=0;
+ if (done)
+ return;
+ done=1;
+
+#ifdef LDAP_R_COMPILE
+
+#if !defined( USE_CTIME_R ) && !defined( HAVE_REENTRANT_FUNCTIONS )
+ ldap_pvt_thread_mutex_init( &ldap_int_ctime_mutex );
+#endif
+
+#ifdef HAVE_RES_QUERY
+ ldap_pvt_thread_mutex_init( &ldap_int_resolv_mutex );
+#endif
+
+ /* call other module init functions here... */
+#endif
+}
+
+#if defined( NEED_COPY_HOSTENT )
+# undef NEED_SAFE_REALLOC
+#define NEED_SAFE_REALLOC
+
+static char *cpy_aliases( char ***tgtio, char *buf, char **src )
+{
+ int len;
+ char **tgt=*tgtio;
+ for( ; (*src) ; src++ ) {
+ len = strlen( *src ) + 1;
+ AC_MEMCPY( buf, *src, len );
+ *tgt++=buf;
+ buf+=len;
+ }
+ *tgtio=tgt;
+ return buf;
+}
+
+static char *cpy_addresses( char ***tgtio, char *buf, char **src, int len )
+{
+ char **tgt=*tgtio;
+ for( ; (*src) ; src++ ) {
+ AC_MEMCPY( buf, *src, len );
+ *tgt++=buf;
+ buf+=len;
+ }
+ *tgtio=tgt;
+ return buf;
+}
+
+static int copy_hostent( struct hostent *res, char **buf, struct hostent * src )
+{
+ char **p;
+ char **tp;
+ char *tbuf;
+ int name_len;
+ int n_alias=0;
+ int total_alias_len=0;
+ int n_addr=0;
+ int total_addr_len;
+ int total_len;
+
+ /* calculate the size needed for the buffer */
+ name_len = strlen( src->h_name ) + 1;
+
+ if( src->h_aliases != NULL ) {
+ for( p = src->h_aliases; (*p) != NULL; p++ ) {
+ total_alias_len += strlen( *p ) + 1;
+ n_alias++;
+ }
+ }
+
+ if( src->h_addr_list != NULL ) {
+ for( p = src->h_addr_list; (*p) != NULL; p++ ) {
+ n_addr++;
+ }
+ total_addr_len = n_addr * src->h_length;
+ }
+
+ total_len = (n_alias + n_addr + 2) * sizeof( char * ) +
+ total_addr_len + total_alias_len + name_len;
+
+ if (safe_realloc( buf, total_len )) {
+ tp = (char **) *buf;
+ tbuf = *buf + (n_alias + n_addr + 2) * sizeof( char * );
+ AC_MEMCPY( res, src, sizeof( struct hostent ) );
+ /* first the name... */
+ AC_MEMCPY( tbuf, src->h_name, name_len );
+ res->h_name = tbuf; tbuf+=name_len;
+ /* now the aliases */
+ res->h_aliases = tp;
+ if ( src->h_aliases != NULL ) {
+ tbuf = cpy_aliases( &tp, tbuf, src->h_aliases );
+ }
+ *tp++=NULL;
+ /* finally the addresses */
+ res->h_addr_list = tp;
+ if ( src->h_addr_list != NULL ) {
+ tbuf = cpy_addresses( &tp, tbuf, src->h_addr_list, src->h_length );
+ }
+ *tp++=NULL;
+ return 0;
+ }
+ return -1;
+}
+#endif
+
+#if defined( NEED_SAFE_REALLOC )
+static char *safe_realloc( char **buf, int len )
+{
+ char *tmpbuf;
+ tmpbuf = LDAP_REALLOC( *buf, len );
+ if (tmpbuf) {
+ *buf=tmpbuf;
+ }
+ return tmpbuf;
+}
+#endif
+
+char * ldap_pvt_get_fqdn( char *name )
+{
+ char *fqdn, *ha_buf;
+ char hostbuf[MAXHOSTNAMELEN+1];
+ struct hostent *hp, he_buf;
+ int rc, local_h_errno;
+
+ if( name == NULL ) {
+ if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
+ hostbuf[MAXHOSTNAMELEN] = '\0';
+ name = hostbuf;
+ } else {
+ name = "localhost";
+ }
+ }
+
+ rc = ldap_pvt_gethostbyname_a( name,
+ &he_buf, &ha_buf, &hp, &local_h_errno );
+
+ if( rc < 0 || hp == NULL || hp->h_name == NULL ) {
+ fqdn = LDAP_STRDUP( name );
+ } else {
+ fqdn = LDAP_STRDUP( hp->h_name );
+ }
+
+ LDAP_FREE( ha_buf );
+ return fqdn;
+}
+
+#if defined( HAVE_GETADDRINFO ) && !defined( HAVE_GAI_STRERROR )
+char *ldap_pvt_gai_strerror (int code) {
+ static struct {
+ int code;
+ const char *msg;
+ } values[] = {
+#ifdef EAI_ADDRFAMILY
+ { EAI_ADDRFAMILY, "Address family for hostname not supported" },
+#endif
+ { EAI_AGAIN, "Temporary failure in name resolution" },
+ { EAI_BADFLAGS, "Bad value for ai_flags" },
+ { EAI_FAIL, "Non-recoverable failure in name resolution" },
+ { EAI_FAMILY, "ai_family not supported" },
+ { EAI_MEMORY, "Memory allocation failure" },
+#ifdef EAI_NODATA
+ { EAI_NODATA, "No address associated with hostname" },
+#endif
+ { EAI_NONAME, "Name or service not known" },
+ { EAI_SERVICE, "Servname not supported for ai_socktype" },
+ { EAI_SOCKTYPE, "ai_socktype not supported" },
+ { EAI_SYSTEM, "System error" },
+ { 0, NULL }
+ };
+
+ int i;
+
+ for ( i = 0; values[i].msg != NULL; i++ ) {
+ if ( values[i].code == code ) {
+ return (char *) values[i].msg;
+ }
+ }
+
+ return "Unknown error";
+}
+#endif
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