API: Reject unknown flags

[adns] / src / query.c

diff --git a/src/query.c b/src/query.c
index 799a318..ff56fc3 100644 (file)
--- a/src/query.c
+++ b/src/query.c
@@ -7,6 +7,7 @@
 /*
  *  This file is part of adns, which is
  *    Copyright (C) 1997-2000,2003,2006,2014  Ian Jackson
+ *    Copyright (C) 2014  Mark Wooding
  *    Copyright (C) 1999-2000,2003,2006  Tony Finch
  *    Copyright (C) 1991 Massachusetts Institute of Technology
  *  (See the file INSTALL for full details.)
@@ -274,6 +275,12 @@ int adns_submit(adns_state ads,
 
   adns__consistency(ads,0,cc_entex);
 
+  if (flags & ~(adns_queryflags)0x4009ffff)
+    /* 0x40080000 are reserved for `harmless' future expansion
+     * 0x00000020 used to be adns_qf_quoteok_cname, now the default;
+     * see also addrfam.c:textaddr_check_qf */
+    return ENOSYS;
+
   typei= adns__findtype(type);
   if (!typei) return ENOSYS;