/// <summary>
/// Convert a StunMethodClass to an host-byte ordered unsigned short
/// </summary>
/// <param name="mClass">The StunMethodClass to convert</param>
/// <returns>
/// The unsigned short (16bits) matching the StunMethodClass
/// Return max UInt16 value if the mClass parameter is StunMethodClass.Unmanaged
/// </returns>
public static UInt16 MethodClassToUInt16(StunMethodClass mClass)
{
foreach (FieldInfo field in typeof(StunMethodClass).GetFields())
{
if (field.Name == mClass.ToString())
{
Object[] fieldAttributes = field.GetCustomAttributes(typeof(StunValueAttribute), false);
if (fieldAttributes.Length == 1)
{
StunValueAttribute stunValueAttribute = fieldAttributes.GetValue(0) as StunValueAttribute;
return(stunValueAttribute.Value);
}
}
}
return(0xFFFF);
}
/// <summary>
/// Convert an host-byte ordered unsigned short to a StunMethodClass
/// </summary>
/// <param name="mClass">An unsigned short representing a method class</param>
/// <returns>
/// The StunMethodClass matching the unsigned short (16bits)
/// Returns StunMethodClass.Unmanaged if the unsigned short doesn't match any StunMethodClass StunValue's
/// </returns>
public static StunMethodClass UInt16ToMethodClass(UInt16 mClass)
{
foreach (FieldInfo field in typeof(StunMethodClass).GetFields())
{
Object[] fieldAttributes = field.GetCustomAttributes(typeof(StunValueAttribute), false);
if (fieldAttributes.Length == 1)
{
StunValueAttribute stunValueAttribute = fieldAttributes.GetValue(0) as StunValueAttribute;
if (stunValueAttribute != null &&
stunValueAttribute.Value == mClass)
{
return((StunMethodClass)Enum.Parse(typeof(StunMethodClass), field.Name));
}
}
}
return(StunMethodClass.Unmanaged);
}
/// <summary>
/// Convert a network-byte ordered array of bytes to a StunAttributeType
/// </summary>
/// <param name="bytes">An array of 2 bytes (16bits) representing an attribute type</param>
/// <returns>
/// The StunAttributeType matching the array of bytes
/// Returns StunAttributeType.Unmanaged if the byte array doesn't match any StunAttributeType StunValue's
/// </returns>
public static StunAttributeType BytesToAttributeType(byte[] bytes)
{
UInt16 type = StunUtilities.ReverseBytes(BitConverter.ToUInt16(bytes, 0));
foreach (FieldInfo field in typeof(StunAttributeType).GetFields())
{
Object[] fieldAttributes = field.GetCustomAttributes(typeof(StunValueAttribute), false);
if (fieldAttributes.Length == 1)
{
StunValueAttribute stunValueAttribute = fieldAttributes.GetValue(0) as StunValueAttribute;
if (stunValueAttribute != null &&
stunValueAttribute.Value == type)
{
return((StunAttributeType)Enum.Parse(typeof(StunAttributeType), field.Name));
}
}
}
return(StunAttributeType.Unmanaged);
}
/// <summary>
/// Convert a StunAttributeType to a network-byte ordered array of bytes
/// </summary>
/// <param name="type">The StunAttributeType to convert</param>
/// <returns>
/// The array of 2 bytes (16bits) matching the StunAttributeType
/// Returns max UInt16 value if the type parameter is StunAttributeType.Unmanaged
/// </returns>
public static byte[] AttributeTypeToBytes(StunAttributeType type)
{
foreach (FieldInfo field in typeof(StunAttributeType).GetFields())
{
if (field.Name == type.ToString())
{
Object[] fieldAttributes = field.GetCustomAttributes(typeof(StunValueAttribute), false);
if (fieldAttributes.Length == 1)
{
StunValueAttribute stunValueAttribute = fieldAttributes.GetValue(0) as StunValueAttribute;
byte[] typeBytes = BitConverter.GetBytes(stunValueAttribute.Value);
Array.Reverse(typeBytes);
return(typeBytes);
}
}
}
return(BitConverter.GetBytes(0xFFFF));
}