#value_indexed
AF_UNSPEC	0
AF_UNIX		1
AF_INET		2
AF_AX25		3
AF_IPX		4
AF_APPLETALK	5
AF_NETROM	6
AF_BRIDGE	7
AF_ATMPVC	8
AF_X25		9
AF_INET6	10
AF_ROSE		11
AF_DECnet	12
AF_NETBEUI	13
AF_SECURITY	14
AF_KEY		15
AF_NETLINK	16
AF_PACKET	17
AF_ASH		18
AF_ECONET	19
AF_ATMSVC	20
AF_RDS		21
AF_SNA		22
AF_IRDA		23
AF_PPPOX	24
AF_WANPIPE	25
AF_LLC		26
AF_IB		27
AF_MPLS		28
AF_CAN		29
AF_TIPC		30
AF_BLUETOOTH	31
AF_IUCV		32
AF_RXRPC	33
AF_ISDN		34
AF_PHONET	35
AF_IEEE802154	36
AF_CAIF		37
AF_ALG		38
AF_NFC		39
AF_VSOCK	40
AF_KCM		41
AF_QIPCRTR	42
AF_SMC		43
AF_XDP		44