subnet_number
subnet->net = subnet_number(subnet->net, subnet->netmask);
struct iaddr subnet_number(struct iaddr, struct iaddr);
net = subnet_number(low, subnet->netmask);
if (!addr_eq(net, subnet_number(high, subnet->netmask))) {
lnet = subnet_number(lp->ip_addr, subnet->netmask);
if (addr_eq(subnet_number(addr, rv->netmask), rv->net))
if (addr_eq(subnet_number(addr, rv->netmask), rv->net))
if (addr_eq(subnet_number(subnet->net, scan->netmask), scan->net) ||
addr_eq(subnet_number(scan->net, subnet->netmask), subnet->net)) {