public TunnelGatewayMessage(BufRef reader)
{
var start = new BufRef(reader);
reader.Seek(6 + reader.PeekFlip16(4));
SetBuffer(start, reader);
}
// Parse received
public DataFragment(BufRef reader)
{
Buf = reader.ReadBufLen(reader.PeekFlip16(5) + 7);
Data = new BufLen(Buf, 7);
}