/// <summary>
/// Used to tell whether an address is a loopback.
/// All IP addresses of the form 127.X.Y.Z, where X, Y, and Z are in
/// the range 0-255, are loopback addresses.
/// </summary>
/// <param name="addr">Address to compare</param>
/// <returns></returns>
public static bool IsLoopback(IPAddress addr) {
if(addr.m_Family == AddressFamily.InterNetwork)
return (addr.m_Address & 0xFF) == 127;
else {
for(int i=0; i<6; i++) {
if(addr.m_Numbers[i] != 0)
return false;
}
return NetworkToHostOrder((short)addr.m_Numbers[7]) == 1;
}
}
static bool TryParse(string ipString, out IPAddress address) {
if(ipString == null)
throw new ArgumentNullException("ipString");
if((address = ParseIPV4(ipString)) == null)
if((address = ParseIPV6(ipString)) == null)
return false;
return true;
}