#define TCPOPT_AUTH 20 /* Enhanced AUTH option */
#define TCPOPT_UTO 28 /* tcp user timeout (rfc5482) */
#define TCPOLEN_UTO 4
-
+#define TCPOPT_MPTCP 30 /* MPTCP options */
#define TCPOPT_TSTAMP_HDR \
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)