public static STUNHeader ParseSTUNHeader(byte[] buffer)
{
if (buffer != null && buffer.Length > 0 && buffer.Length >= STUN_HEADER_LENGTH)
{
STUNHeader stunHeader = new STUNHeader();
UInt16 stunTypeValue = BitConverter.ToUInt16(buffer, 0);
UInt16 stunMessageLength = BitConverter.ToUInt16(buffer, 2);
if (BitConverter.IsLittleEndian)
{
stunTypeValue = Utility.ReverseEndian(stunTypeValue);
stunMessageLength = Utility.ReverseEndian(stunMessageLength);
}
stunHeader.MessageType = STUNMessageTypes.GetSTUNMessageTypeForId(stunTypeValue);
stunHeader.MessageLength = stunMessageLength;
//stunHeader.TransactionId = BitConverter.ToString(buffer, 4, TRANSACTION_ID_LENGTH);
Buffer.BlockCopy(buffer, 4, stunHeader.TransactionId, 0, TRANSACTION_ID_LENGTH);
return(stunHeader);
}
return(null);
}
public static STUNHeader ParseSTUNHeader(byte[] buffer)
{
if ((buffer[0] & STUN_INITIAL_BYTE_MASK) != 0)
{
throw new ApplicationException("The STUN header did not begin with 0x00.");
}
if (buffer != null && buffer.Length > 0 && buffer.Length >= STUN_HEADER_LENGTH)
{
STUNHeader stunHeader = new STUNHeader();
UInt16 stunTypeValue = BitConverter.ToUInt16(buffer, 0);
UInt16 stunMessageLength = BitConverter.ToUInt16(buffer, 2);
if (BitConverter.IsLittleEndian)
{
stunTypeValue = NetConvert.DoReverseEndian(stunTypeValue);
stunMessageLength = NetConvert.DoReverseEndian(stunMessageLength);
}
stunHeader.MessageType = STUNMessageTypes.GetSTUNMessageTypeForId(stunTypeValue);
stunHeader.MessageLength = stunMessageLength;
Buffer.BlockCopy(buffer, 8, stunHeader.TransactionId, 0, TRANSACTION_ID_LENGTH);
return(stunHeader);
}
return(null);
}