s3:is_trusted_domain: shortcut if domain name is NULL or empty

This saves some roundtrips to LDAP in an ldapsm setup.

Michael
(cherry picked from commit 0aa5a60d3033fddd652eb4ea89abdf97db912df3)

diff --git a/source3/auth/auth_util.c b/source3/auth/auth_util.c
index 1d25e2220284e3a4ba64df18ccc3490560c3eef5..512cae0dcbb23bb74b5880c32d25d8397d3fc5e7 100644 (file)
--- a/source3/auth/auth_util.c
+++ b/source3/auth/auth_util.c
@@ -2181,6 +2181,10 @@ bool is_trusted_domain(const char* dom_name)
        if ( lp_server_role() == ROLE_STANDALONE )
                return False;
 
+       if (dom_name == NULL || dom_name[0] == '\0') {
+               return false;
+       }
+
        /* if we are a DC, then check for a direct trust relationships */
 
        if ( IS_DC ) {