public static StunMessageClass Parse(Bits bits)
{
if (bits.Count != 2)
{
throw new ArgumentException("The number of bits must be 2.", nameof(bits));
}
if (Request.Bits.SequenceEqual(bits.ToBitArray()))
{
return Request;
}
if (SuccessResponse.Bits.SequenceEqual(bits.ToBitArray()))
{
return SuccessResponse;
}
if (FailureResponse.Bits.SequenceEqual(bits.ToBitArray()))
{
return FailureResponse;
}
if (Indication.Bits.SequenceEqual(bits.ToBitArray()))
{
return Indication;
}
throw new InvalidOperationException("Invalid class.");
}
public static StunMessageMethod Parse(Bits bits)
{
if (bits.Count != 12)
{
throw new ArgumentException("The number of bits must be 12.", nameof(bits));
}
if (Binding.Bits.SequenceEqual(bits.ToBitArray()))
{
return Binding;
}
throw new InvalidOperationException("Invalid method.");
}
public StunMessageType(StunMessageMethod method, StunMessageClass @class)
{
if (!method.PermittedClasses.Contains(@class))
{
throw new ArgumentException($"The class {@class} is not permitted by the method {method}.", nameof(@class));
}
Name = method.Name + " " + @class.Name;
var methodBits = new Bits(method.Bits);
var classBits = new Bits(@class.Bits);
var bits = new Bits(14);
bits.AddBits(methodBits.PopBits(5));
bits.AddBit(classBits.Pop());
bits.AddBits(methodBits.PopBits(3));
bits.AddBit(classBits.Pop());
bits.AddBits(methodBits);
Bits = bits.ToBitArray();
}