--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBLib/Communication/UsbInterface.cs	Mon Apr 15 01:04:59 2013 +0200
@@ -0,0 +1,61 @@
+using System;
+using System.Text;
+using UCIS.USBLib.Descriptor;
+
+namespace UCIS.USBLib.Communication {
+	public abstract class UsbInterface : IUsbInterface {
+		public virtual byte Configuration {
+			get {
+				byte[] buf = new byte[1];
+				int tl = ControlRead(
+					UsbControlRequestType.EndpointIn | UsbControlRequestType.TypeStandard | UsbControlRequestType.RecipDevice,
+					(byte)UsbStandardRequest.GetConfiguration, 0, 0,
+					buf, 0, buf.Length);
+				if (tl != buf.Length) throw new Exception("Read failed");
+				return buf[0];
+			}
+			set {
+				throw new NotImplementedException();
+			}
+		}
+		public unsafe virtual string GetString(short langId, byte stringIndex) {
+			Byte[] buffer = new Byte[256];
+			int tl = GetDescriptor((byte)UsbDescriptorType.String, stringIndex, langId, buffer, 0, buffer.Length);
+			if (tl < 2) return null;
+			return UsbStringDescriptor.GetString(buffer, 0, tl);
+		}
+		public virtual int GetDescriptor(byte descriptorType, byte index, short langId, byte[] buffer, int offset, int length) {
+			return ControlRead(
+				UsbControlRequestType.EndpointIn | UsbControlRequestType.RecipDevice | UsbControlRequestType.TypeStandard,
+				(Byte)UsbStandardRequest.GetDescriptor,
+				(short)((descriptorType << 8) | index), langId, buffer, offset, length);
+		}
+		public virtual int ControlWrite(UsbControlRequestType requestType, byte request, short value, short index) {
+			return ControlWrite(requestType, request, value, index, null, 0, 0);
+		}
+
+		public abstract void Close();
+
+		public abstract int BulkWrite(Byte endpoint, Byte[] buffer, int offset, int length);
+		public abstract int BulkRead(Byte endpoint, Byte[] buffer, int offset, int length);
+		public abstract int InterruptWrite(Byte endpoint, Byte[] buffer, int offset, int length);
+		public abstract int InterruptRead(Byte endpoint, Byte[] buffer, int offset, int length);
+		public abstract int ControlWrite(UsbControlRequestType requestType, byte request, short value, short index, byte[] buffer, int offset, int length);
+		public abstract int ControlRead(UsbControlRequestType requestType, byte request, short value, short index, byte[] buffer, int offset, int length);
+
+		public UsbPipeStream GetBulkStream(Byte endpoint) {
+			return new UsbPipeStream(this, endpoint, false);
+		}
+		public UsbPipeStream GetInterruptStream(Byte endpoint) {
+			return new UsbPipeStream(this, endpoint, true);
+		}
+
+		public void Dispose() {
+			Close();
+			GC.SuppressFinalize(this);
+		}
+		~UsbInterface() {
+			Close();
+		}
+	}
+}