openldap2/0009-Fix-ldap-host-lookup-ipv6.patch

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The patch was written by Christian Kornacker on 2014-01-08 to fix an issue with unresponsive
LDAP host lookups in IPv6 environment.
---
libraries/libldap/util-int.c | 39 +++++++++++++++++++++++++++++++++++++--
1 file changed, 37 insertions(+), 2 deletions(-)
Index: openldap-2.4.41/libraries/libldap/util-int.c
===================================================================
--- openldap-2.4.41.orig/libraries/libldap/util-int.c
+++ openldap-2.4.41/libraries/libldap/util-int.c
@@ -731,10 +731,16 @@ static char *safe_realloc( char **buf, i
char * ldap_pvt_get_fqdn( char *name )
{
- char *fqdn, *ha_buf;
+ int rc;
+ char *fqdn;
char hostbuf[MAXHOSTNAMELEN+1];
+#ifdef HAVE_GETADDRINFO
+ struct addrinfo hints, *res;
+#else
+ char *ha_buf;
struct hostent *hp, he_buf;
- int rc, local_h_errno;
+ int local_h_errno;
+#endif
if( name == NULL ) {
if( gethostname( hostbuf, MAXHOSTNAMELEN ) == 0 ) {
@@ -745,6 +751,33 @@ char * ldap_pvt_get_fqdn( char *name )
}
}
+#ifdef HAVE_GETADDRINFO
+ memset( &hints, '\0', sizeof( hints ) );
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags |= AI_CANONNAME;
+
+ /* most getaddrinfo(3) use non-threadsafe resolver libraries */
+ LDAP_MUTEX_LOCK(&ldap_int_resolv_mutex);
+
+ rc = getaddrinfo( name, NULL, &hints, &res );
+
+ LDAP_MUTEX_UNLOCK(&ldap_int_resolv_mutex);
+
+ if ( rc != 0 ) {
+ fqdn = LDAP_STRDUP( name );
+ } else {
+ while ( res ) {
+ if ( res->ai_canonname ) {
+ fqdn = LDAP_STRDUP ( res->ai_canonname );
+ break;
+ }
+ res = res->ai_next;
+ }
+ freeaddrinfo( res );
+ }
+#else
+
rc = ldap_pvt_gethostbyname_a( name,
&he_buf, &ha_buf, &hp, &local_h_errno );
@@ -755,6 +788,8 @@ char * ldap_pvt_get_fqdn( char *name )
}
LDAP_FREE( ha_buf );
+#endif
+
return fqdn;
}