used for optimizing the rxrpc protocol added in linux commit 5271953cad31b97dea80f848c16e96ad66401199
@@ -33,6 +33,7 @@ struct udphdr {
#define UDP_ENCAP_L2TPINUDP 3
#define UDP_ENCAP_GTP0 4
#define UDP_ENCAP_GTP1U 5
+#define UDP_ENCAP_RXRPC 6
#define SOL_UDP 17