# HG changeset patch
# User Ivo Smits <Ivo@UCIS.nl>
# Date 1380742449 -7200
# Node ID ec222fb577ddce0b6e93ec21fe94e02e3b9a688a
# Parent  ba4e2cb031e035605ae2294c5098fe8c61f3cbf7
Added Windows Named Pipe stream wrapper

diff -r ba4e2cb031e0 -r ec222fb577dd UCIS.Core.csproj
--- a/UCIS.Core.csproj	Wed Oct 02 21:17:30 2013 +0200
+++ b/UCIS.Core.csproj	Wed Oct 02 21:34:09 2013 +0200
@@ -178,6 +178,7 @@
     <Compile Include="VNCServer\IFramebuffer.cs" />
     <Compile Include="VNCServer\VNCServer.cs" />
     <Compile Include="Windows\ServiceManager.cs" />
+    <Compile Include="Windows\WindowsNamedPipe.cs" />
     <Compile Include="Xml\PolicyFile.cs" />
     <Compile Include="Xml\Server.cs" />
     <Compile Include="Xml\Socket.cs" />
diff -r ba4e2cb031e0 -r ec222fb577dd Windows/WindowsNamedPipe.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Windows/WindowsNamedPipe.cs	Wed Oct 02 21:34:09 2013 +0200
@@ -0,0 +1,178 @@
+using System;
+using System.ComponentModel;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Threading;
+using Microsoft.Win32.SafeHandles;
+using UCIS.Util;
+
+namespace UCIS.Windows {
+	public class WindowsNamedPipe : PacketStream {
+		delegate Byte[] ReadPacketDelegate();
+		ReadPacketDelegate ReadPacketDelegateInstance = null;
+		SafeFileHandle PipeHandle;
+
+		[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+		static extern SafeFileHandle CreateFile(string lpFileName, uint dwDesiredAccess, [MarshalAs(UnmanagedType.U4)] FileShare dwShareMode, IntPtr lpSecurityAttributes, [MarshalAs(UnmanagedType.U4)] FileMode dwCreationDisposition, UInt32 dwFlagsAndAttributes, IntPtr hTemplateFile);
+		[DllImport("kernel32.dll", SetLastError = true)]
+		static extern unsafe bool ReadFile(SafeFileHandle hFile, Byte* lpBuffer, uint nNumberOfBytesToRead, out uint lpNumberOfBytesRead, NativeOverlapped* lpOverlapped);
+		[DllImport("kernel32.dll", SetLastError = true)]
+		static extern unsafe bool WriteFile(SafeFileHandle hFile, Byte* lpBuffer, uint nNumberOfBytesToWrite, out uint lpNumberOfBytesWritten, NativeOverlapped* lpOverlapped);
+		[DllImport("kernel32.dll", SetLastError = true)]
+		static extern unsafe bool GetOverlappedResult(SafeFileHandle hFile, NativeOverlapped* lpOverlapped, out uint lpNumberOfBytesTransferred, Boolean bWait);
+		[DllImport("kernel32.dll", SetLastError = true)]
+		static extern bool SetNamedPipeHandleState(SafeFileHandle hNamedPipe, ref UInt32 lpMode, IntPtr lpMaxCollectionCount, IntPtr lpCollectDataTimeout);
+		[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Ansi)]
+		static extern SafeFileHandle CreateNamedPipe([MarshalAs(UnmanagedType.LPStr)] String lpName, UInt32 dwOpenMode, UInt32 dwPipeMode, UInt32 nMaxInstances, UInt32 nOutBufferSize, UInt32 nInBufferSize, UInt32 nDefaultTimeOut, IntPtr lpSecurityAttributes);
+		[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+		static extern unsafe bool ConnectNamedPipe(SafeFileHandle hNamedPipe, NativeOverlapped* lpOverlapped);
+		[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
+		static extern unsafe bool GetNamedPipeInfo(SafeFileHandle hNamedPipe, out UInt32 lpFlags, IntPtr lpOutBufferSize, IntPtr lpInBufferSize, IntPtr lpMaxInstances);
+
+		const UInt32 PIPE_ACCESS_DUPLEX = 0x00000003;
+		const UInt32 FILE_FLAG_OVERLAPPED = 0x40000000;
+		const UInt32 PIPE_TYPE_BYTE = 0x00000000;
+		const UInt32 PIPE_TYPE_MESSAGE = 0x00000004;
+		const UInt32 PIPE_READMODE_BYTE = 0x00000000;
+		const UInt32 PIPE_READMODE_MESSAGE = 0x00000002;
+
+		public int InitialMessageBufferSize { get; set; }
+
+		private WindowsNamedPipe(SafeFileHandle handle) {
+			InitialMessageBufferSize = 1024;
+			this.PipeHandle = handle;
+		}
+		public static WindowsNamedPipe Create(String name, Boolean messageMode, uint maxClients, uint readBuffer, uint writeBuffer, uint defaultTimeout) {
+			SafeFileHandle handle = CreateNamedPipe(name, PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED, 
+				messageMode ? (PIPE_TYPE_MESSAGE | PIPE_READMODE_MESSAGE) : (PIPE_TYPE_BYTE | PIPE_READMODE_BYTE),
+				maxClients, writeBuffer, readBuffer, defaultTimeout, IntPtr.Zero);
+			if (handle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error());
+			return new WindowsNamedPipe(handle);
+		}
+		public static WindowsNamedPipe Connect(String name) {
+			SafeFileHandle handle = CreateFile(name, 0x40000000 | 0x80000000, FileShare.None, IntPtr.Zero, FileMode.Open, 0x40000000, IntPtr.Zero);
+			if (handle.IsInvalid) throw new Win32Exception(Marshal.GetLastWin32Error());
+			UInt32 flags;
+			if (!GetNamedPipeInfo(handle, out flags, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero)) throw new Win32Exception(Marshal.GetLastWin32Error());
+			UInt32 lpMode = (flags & PIPE_TYPE_MESSAGE) != 0 ? PIPE_READMODE_MESSAGE : PIPE_READMODE_BYTE;
+			if (!SetNamedPipeHandleState(handle, ref lpMode, IntPtr.Zero, IntPtr.Zero)) throw new Win32Exception(Marshal.GetLastWin32Error());
+			return new WindowsNamedPipe(handle);
+		}
+
+		public unsafe void WaitForClient() {
+			uint nread;
+			using (ManualResetEvent evt = new ManualResetEvent(false)) {
+				NativeOverlapped overlapped = new NativeOverlapped();
+				overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
+				if (!ConnectNamedPipe(PipeHandle, &overlapped)) {
+					int err = Marshal.GetLastWin32Error();
+					if (err != 997) throw new Win32Exception(err);
+					evt.WaitOne();
+					if (!GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) throw new Win32Exception(Marshal.GetLastWin32Error());
+				}
+			}
+		}
+
+		private unsafe int ReadInternal(Byte[] buffer, int offset, int count, out int error) {
+			if (offset < 0 || offset + count > buffer.Length) throw new ArgumentOutOfRangeException("offset", "Specified buffer is outside of array bounds");
+			uint nread;
+			using (ManualResetEvent evt = new ManualResetEvent(false)) {
+				NativeOverlapped overlapped = new NativeOverlapped();
+				overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
+				fixed (Byte* bufferptr = buffer) {
+					if (ReadFile(PipeHandle, bufferptr + offset, (uint)count, out nread, &overlapped)) {
+						error = 0;
+					} else {
+						error = Marshal.GetLastWin32Error();
+						if (error == 997) {
+							evt.WaitOne();
+							if (GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) {
+								error = 0;
+							} else {
+								error = Marshal.GetLastWin32Error();
+							}
+						}
+					}
+					return (int)nread;
+				}
+			}
+		}
+		public override unsafe int Read(byte[] buffer, int offset, int count) {
+			int error;
+			int nread = ReadInternal(buffer, offset, count, out error);
+			if (error == 109) return 0;
+			if (error == 0) return nread;
+			throw new Win32Exception(error);
+		}
+		public override unsafe void Write(byte[] buffer, int offset, int count) {
+			if (offset < 0 || offset + count > buffer.Length) throw new ArgumentOutOfRangeException("offset", "Specified buffer is outside of array bounds");
+			uint nread;
+			using (ManualResetEvent evt = new ManualResetEvent(false)) {
+				NativeOverlapped overlapped = new NativeOverlapped();
+				overlapped.EventHandle = evt.SafeWaitHandle.DangerousGetHandle();
+				fixed (Byte* bufferptr = buffer) {
+					if (!WriteFile(PipeHandle, bufferptr + offset, (uint)count, out nread, &overlapped)) {
+						int err = Marshal.GetLastWin32Error();
+						if (err != 997) throw new Win32Exception(err);
+						evt.WaitOne();
+						if (!GetOverlappedResult(PipeHandle, &overlapped, out nread, false)) throw new Win32Exception(Marshal.GetLastWin32Error());
+					}
+				}
+			}
+			if (nread != count) throw new IOException("Not all data could be written");
+		}
+		public override void Close() {
+			base.Close();
+			PipeHandle.Close();
+		}
+
+		public unsafe override byte[] ReadPacket() {
+			int offset = 0;
+			Byte[] buffer = new Byte[InitialMessageBufferSize];
+			while (true) {
+				int error;
+				int nread = ReadInternal(buffer, offset, buffer.Length - offset, out error);
+				offset += nread;
+				if (error == 109) {
+					return null;
+				} else if (error == 0) {
+					if (offset != buffer.Length) Array.Resize(ref buffer, offset);
+					return buffer;
+				} else if (error == 234) {
+					offset = buffer.Length;
+					Array.Resize(ref buffer, buffer.Length * 2);
+				} else {
+					throw new Win32Exception(error);
+				}
+			}
+		}
+		public override IAsyncResult BeginReadPacket(AsyncCallback callback, object state) {
+			if (ReadPacketDelegateInstance == null) ReadPacketDelegateInstance = (ReadPacketDelegate)ReadPacket;
+			return ReadPacketDelegateInstance.BeginInvoke(callback, state);
+		}
+		public override byte[] EndReadPacket(IAsyncResult asyncResult) {
+			return ReadPacketDelegateInstance.EndInvoke(asyncResult);
+		}
+
+		public override bool CanRead {
+			get { return !PipeHandle.IsClosed; }
+		}
+		public override bool CanWrite {
+			get { return !PipeHandle.IsClosed; }
+		}
+
+		public override void Flush() { }
+		public override bool CanSeek { get { return false; } }
+
+		public override long Length { get { throw new NotSupportedException(); } }
+		public override long Position {
+			get { throw new NotSupportedException(); }
+			set { throw new NotSupportedException(); }
+		}
+
+		public override long Seek(long offset, System.IO.SeekOrigin origin) { throw new NotSupportedException(); }
+
+		public override void SetLength(long value) { throw new NotSupportedException(); }
+
+	}
+}