SO_KEEPALIVE      959 src/simh/sim_sock.c     sta = setsockopt (newsock, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive, sizeof(keepalive));
SO_KEEPALIVE     1040 src/simh/sim_sock.c sta = setsockopt (newsock, SOL_SOCKET, SO_KEEPALIVE, (char *)&keepalive, sizeof(keepalive));