#define SUBTLV_PADN 1
#define SUBTLV_DIVERSITY 2 /* Also known as babelz. */
#define SUBTLV_TIMESTAMP 3 /* Used to compute RTT. */
+#define SUBTLV_SOURCE_PREFIX 128 /* Source-specific routing. */
#define SUBTLV_MANDATORY 0x80
extern unsigned short myseqno;