HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_RECV 937 ext/socket/option.c defined HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_RECV || \ HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_RECV 1072 ext/socket/option.c #ifdef HAVE_STRUCT_TCP_INFO_TCPI_LAST_ACK_RECV