...the only supported domains for this call are AF_UNIX (or synonymously, AF_LOCAL ) and AF_TIPC (since Linux 4.12). STANDARDS POSIX.1-2008. HISTORY POSIX.1-2001, 4.4BSD. socketpai…...Multiprotocol Label Switching AF_CAN . Controller Area Network automotive bus protocol AF_TIPC . TIPC, "cluster domain sockets" protocol AF_BLUETOOTH . Bluetooth low-level socke…