RTA_UNSPEC		0
RTA_DST			1
RTA_SRC			2
RTA_IIF			3
RTA_OIF			4
RTA_GATEWAY		5
RTA_PRIORITY		6
RTA_PREFSRC		7
RTA_METRICS		8
RTA_MULTIPATH		9
RTA_PROTOINFO		10
RTA_FLOW		11
RTA_CACHEINFO		12
RTA_SESSION		13
RTA_MP_ALGO		14
RTA_TABLE		15
RTA_MARK		16
RTA_MFC_STATS		17
RTA_VIA			18
RTA_NEWDST		19
RTA_PREF		20
RTA_ENCAP_TYPE		21
RTA_ENCAP		22
RTA_EXPIRES		23
RTA_PAD			24
RTA_UID			25
RTA_TTL_PROPAGATE	26