TCP_LAST_ACK      877 ext/socket/option.c #if defined(HAVE_CONST_TCP_LAST_ACK) && !defined(TCP_LAST_ACK)
TCP_LAST_ACK      878 ext/socket/option.c # define TCP_LAST_ACK TCP_LAST_ACK
TCP_LAST_ACK      996 ext/socket/option.c # ifdef TCP_LAST_ACK
TCP_LAST_ACK      997 ext/socket/option.c           case TCP_LAST_ACK: rb_str_cat_cstr(ret, " state=LAST_ACK"); break;