1#value_indexed 2AF_UNSPEC 0 3AF_UNIX 1 4AF_INET 2 5AF_AX25 3 6AF_IPX 4 7AF_APPLETALK 5 8AF_NETROM 6 9AF_BRIDGE 7 10AF_ATMPVC 8 11AF_X25 9 12AF_INET6 10 13AF_ROSE 11 14AF_DECnet 12 15AF_NETBEUI 13 16AF_SECURITY 14 17AF_KEY 15 18AF_NETLINK 16 19AF_PACKET 17 20AF_ASH 18 21AF_ECONET 19 22AF_ATMSVC 20 23AF_RDS 21 24AF_SNA 22 25AF_IRDA 23 26AF_PPPOX 24 27AF_WANPIPE 25 28AF_LLC 26 29AF_IB 27 30AF_MPLS 28 31AF_CAN 29 32AF_TIPC 30 33AF_BLUETOOTH 31 34AF_IUCV 32 35AF_RXRPC 33 36AF_ISDN 34 37AF_PHONET 35 38AF_IEEE802154 36 39AF_CAIF 37 40AF_ALG 38 41AF_NFC 39 42AF_VSOCK 40 43AF_KCM 41 44AF_QIPCRTR 42 45AF_SMC 43 46AF_XDP 44 47