intoa
setenv("boot.netif.netmask", intoa(netmask), 1);
intoa(netmask));
printf("'native netmask' is %s\n", intoa(netmask));
printf("mask: %s\n", intoa(netmask));
return (intoa(ia.s_addr));
char *intoa(n_long); /* similar to inet_ntoa */