1 PF_UNSPEC 2 PF_LOCAL 3 PF_UNIX 4 PF_INET 5 PF_AX25 6 PF_IPX 7 PF_APPLETALK 8 PF_NETROM 9 PF_BRIDGE 10 PF_ATMPVC 11 PF_X25 12 PF_INET6 13 PF_ROSE 14 PF_DECnet 15 PF_NETBEUI 16 PF_SECURITY 17 PF_KEY 18 PF_NETLINK 19 PF_ROUTE 20 PF_PACKET 21 PF_ASH 22 PF_ECONET 23 PF_ATMSVC 24 PF_RDS 25 PF_SNA 26 PF_IRDA 27 PF_PPPOX 28 PF_WANPIPE 29 PF_LLC 30 PF_CAN 31 PF_TIPC 32 PF_BLUETOOTH 33 PF_IUCV 34 PF_RXRPC 35 PF_ISDN 36 PF_PHONET 37 PF_IEEE802154 38 PF_CAIF 39 PF_ALG 40 PF_NFC 41 PF_VSOCK 42
