allocation_pool.py 文件源码

def _build_excludes(self):
        self._validate_allocation_pools()
        subnet_net = netaddr.IPNetwork(self._subnet_cidr)
        version = subnet_net.version
        cidrset = netaddr.IPSet(
            netaddr.IPRange(
                netaddr.IPAddress(subnet_net.first, version=version),
                netaddr.IPAddress(subnet_net.last, version=version)).cidrs())

        if isinstance(self._alloc_pools, list):
            for p in self._alloc_pools:
                start = netaddr.IPAddress(p["start"])
                end = netaddr.IPAddress(p["end"])
                cidrset -= netaddr.IPSet(netaddr.IPRange(
                    netaddr.IPAddress(start),
                    netaddr.IPAddress(end)).cidrs())
        elif self._alloc_pools is None:
            # Empty list is completely unallocatable, None is fully
            # allocatable
            cidrset = netaddr.IPSet()

        for p in self._policies:
            cidrset.add(netaddr.IPNetwork(p))

        self._exclude_cidrs = cidrset