public static IPv4Address GetIPv4NetworkAddress(this Random random, IPv4SubnetMask mask)
{
IPv4Address start = random.GetIPv4Address();
Byte[] rawResult = ByteHelper.AndArray(start.GetBytes(), mask.GetBytes());
IPv4Address result = IPv4Address.FromByteArray(rawResult);
return(result);
}
public void IPv4SubnetMask_FromByteArray(Byte[] input, Boolean parsable)
{
if (parsable == false)
{
Assert.ThrowsAny <Exception>(() => IPv4SubnetMask.FromByteArray(input));
return;
}
IPv4SubnetMask mask = IPv4SubnetMask.FromByteArray(input);
Byte[] actual = mask.GetBytes();
Assert.Equal(input, actual);
}
public void IPv4SubnetMask_FromIdentifier()
{
Dictionary <Int32, Byte> mapper = new Dictionary <int, byte>
{
{ 0, 0 },
{ 1, 128 },
{ 2, 192 },
{ 3, 224 },
{ 4, 240 },
{ 5, 248 },
{ 6, 252 },
{ 7, 254 },
{ 8, 255 },
};
for (int maskIdentifier = 0; maskIdentifier <= 32; maskIdentifier++)
{
IPv4SubnetMask mask = new IPv4SubnetMask(new IPv4SubnetMaskIdentifier(maskIdentifier));
Byte[] result = mask.GetBytes();
Int32 index = maskIdentifier % 8;
Int32 arrayIndex = maskIdentifier / 8;
if (maskIdentifier == 32)
{
for (int i = 0; i < 4; i++)
{
Assert.Equal(255, result[i]);
}
continue;
}
for (int j = 0; j < arrayIndex; j++)
{
Assert.Equal(255, result[j]);
}
Assert.Equal(mapper[index], result[arrayIndex]);
}
}