improve portability, defining MAXDNAME and MAXCDNAME

diff --git a/ares/nameser.h b/ares/nameser.h
index 34f8dab32c9b3c69a03cf03902ded2f1a12e53a4..61741bb5f8a987c9ba4020d282aa66d954cb32ef 100644 (file)
--- a/ares/nameser.h
+++ b/ares/nameser.h
@@ -149,6 +149,11 @@ typedef enum __ns_opcode {
 
 #define T_CNAME                ns_t_cname
 
+#define NS_MAXDNAME   256     /* maximum domain name */
+#define MAXDNAME      NS_MAXDNAME
+
+#define NS_MAXCDNAME  255     /* maximum compressed domain name */
+#define MAXCDNAME     NS_MAXCDNAME
 
 #define NS_PACKETSZ   512     /* maximum packet size */
 #define PACKETSZ       NS_PACKETSZ