Marshal.PtrToStructure (and back again) and generic solution for endianness swapping

Question

I have a system where a remote agent sends serialized structures (from an embedded C system) for me to read and store via IP/UDP. In some cases I need to send back the same

Answer 1

For those of us without Linq, a replacement RespectEndianness():

private static void RespectEndianness(Type type, byte[] data) {
    foreach (FieldInfo f in type.GetFields()) {
        if (f.IsDefined(typeof(EndianAttribute), false)) {
            EndianAttribute att = (EndianAttribute)f.GetCustomAttributes(typeof(EndianAttribute), false)[0];
            int offset = Marshal.OffsetOf(type, f.Name).ToInt32();
            if ((att.Endianness == Endianness.BigEndian && BitConverter.IsLittleEndian) ||
                (att.Endianness == Endianness.LittleEndian && !BitConverter.IsLittleEndian)) {
                Array.Reverse(data, offset, Marshal.SizeOf(f.FieldType));
            }
        }
    }
}