+ /* NTPv4 (RFC 5905, section 7.4) formalizes that refid _may_
+ * contain a printable, four-character, left justified, zero
+ * filled ASCII string ("kiss code") for status reporting
+ * and debugging. Some kiss codes are defined in the RFC as
+ * initial set for a new IANA registry, but the list may be
+ * modified or extended in the future, and unregistered kiss
+ * codes are possible (and are being seen in the field).
+ */
+ if (!ND_ASCII_ISPRINT(GET_U_1(bp->refid))) {
+ ND_PRINT("(unspec)");
+ ND_TCHECK_4(bp->refid);
+ } else {
+ nd_printjn(ndo, (const u_char *)&(bp->refid), 4);
+ }