rta_getattr
flags = rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_FLAGS]);
rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_TOKEN_REM]),
rta_getattr(__u8, tb[MPTCP_SUBFLOW_ATTR_ID_REM]),
rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_TOKEN_LOC]),
rta_getattr(__u8, tb[MPTCP_SUBFLOW_ATTR_ID_LOC]));
rta_getattr(__u64, tb[MPTCP_SUBFLOW_ATTR_MAP_SEQ]));
rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_MAP_SFSEQ]));
rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_SSN_OFFSET]));
rta_getattr(__u32, tb[MPTCP_SUBFLOW_ATTR_MAP_DATALEN]));