SO_KEEPALIVE 310 source3/lib/util_sock.c {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL}, SO_KEEPALIVE 495 source4/lib/socket/socket.c {"SO_KEEPALIVE", SOL_SOCKET, SO_KEEPALIVE, 0, OPT_BOOL},