public static List <IPNetwork <TAddress> > ResizeNetwork <TAddress>(IPNetwork <TAddress> initialNet,
TAddress newSubnetMask, Func <TAddress, TAddress, IPNetwork <TAddress> > createSubnet, out int netComparison)
where TAddress : struct, IIPAddress <TAddress>
{
int initialHostBits = initialNet.CiscoWildcard.Bytes.Sum(b => CalcIPUtils.BytePopCount[b]);
int newNetBits = newSubnetMask.Bytes.Sum(b => CalcIPUtils.BytePopCount[b]);
int newHostBits = newSubnetMask.BitwiseNot().Bytes.Sum(b => CalcIPUtils.BytePopCount[b]);
if (newHostBits > initialHostBits)
{
// supernet
netComparison = -1;
TAddress unraveledInitialBaseAddress = CalcIPUtils.UnravelAddress(initialNet.BaseAddress, initialNet.SubnetMask);
IPNetwork <TAddress> unraveledShortenedNet = createSubnet(unraveledInitialBaseAddress, newSubnetMask.SubnetMaskFromCidrPrefix(newNetBits));
TAddress wovenNewBaseAddress = CalcIPUtils.WeaveAddress(unraveledShortenedNet.BaseAddress, newSubnetMask);
var newNet = createSubnet(wovenNewBaseAddress, newSubnetMask);
return(new List <IPNetwork <TAddress> > {
newNet
});
}
else if (newHostBits == initialHostBits)
{
// samenet
netComparison = 0;
TAddress unraveledBaseAddress = CalcIPUtils.UnravelAddress(initialNet.BaseAddress, initialNet.SubnetMask);
TAddress wovenNewBaseAddress = CalcIPUtils.WeaveAddress(unraveledBaseAddress, newSubnetMask);
var newNet = createSubnet(wovenNewBaseAddress, newSubnetMask);
return(new List <IPNetwork <TAddress> > {
newNet
});
}
else
{
// subnet(s)
netComparison = 1;
TAddress unraveledBaseAddress = CalcIPUtils.UnravelAddress(initialNet.BaseAddress, initialNet.SubnetMask);
TAddress unraveledLastAddress = CalcIPUtils.UnravelAddress(initialNet.LastAddressOfSubnet, initialNet.SubnetMask);
var ret = new List <IPNetwork <TAddress> >();
TAddress currentUnraveledBaseAddress = unraveledBaseAddress;
while (currentUnraveledBaseAddress.CompareTo(unraveledLastAddress) <= 0)
{
TAddress wovenNewBaseAddress = CalcIPUtils.WeaveAddress(currentUnraveledBaseAddress, newSubnetMask);
var newNet = createSubnet(wovenNewBaseAddress, newSubnetMask);
ret.Add(newNet);
currentUnraveledBaseAddress = newNet.NextSubnetBaseAddress;
}
return(ret);
}
}
public static IEnumerable <TAddress> EnumerateNetwork <TAddress>(IPNetwork <TAddress> network)
where TAddress : struct, IIPAddress <TAddress>
{
BigInteger hostCount = network.HostCount;
TAddress currentAddress = CalcIPUtils.UnravelAddress(network.BaseAddress, network.SubnetMask);
for (BigInteger i = BigInteger.Zero; i < hostCount; ++i)
{
yield return(CalcIPUtils.WeaveAddress(currentAddress, network.SubnetMask));
currentAddress = currentAddress.Add(1);
}
}