IN_CLASSA_HOST
return ((i)&IN_CLASSA_HOST);
addr = (net << IN_CLASSA_NSHIFT) | (host & IN_CLASSA_HOST);
(IN_CLASSA(b) && (b | IN_CLASSA_HOST) == i))
return ((IN_CLASSA_HOST & addr) == 0 ||
(IN_CLASSA_HOST & addr) == IN_CLASSA_HOST)? 0 : 1;