// IsLoopback reports whether ip is a loopback address.
public static bool IsLoopback(this IP ip)
{
{
var ip4 = ip.To4();
if (ip4 != null)
{
return(ip4[0L] == 127L);
}
}
return(ip.Equal(IPv6loopback));
}
// IsGlobalUnicast reports whether ip is a global unicast
// address.
//
// The identification of global unicast addresses uses address type
// identification as defined in RFC 1122, RFC 4632 and RFC 4291 with
// the exception of IPv4 directed broadcast addresses.
// It returns true even if ip is in IPv4 private address space or
// local IPv6 unicast address space.
public static bool IsGlobalUnicast(this IP ip)
{
return((len(ip) == IPv4len || len(ip) == IPv6len) && !ip.Equal(IPv4bcast) && !ip.IsUnspecified() && !ip.IsLoopback() && !ip.IsMulticast() && !ip.IsLinkLocalUnicast());
}
// IsUnspecified reports whether ip is an unspecified address, either
// the IPv4 address "0.0.0.0" or the IPv6 address "::".
public static bool IsUnspecified(this IP ip)
{
return(ip.Equal(IPv4zero) || ip.Equal(IPv6unspecified));
}