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