namedpipeapi.cs

通过NamePipe与其他进程通信的代码

		/// read from the pipe.</param>
		/// <param name="nOutBufferSize">Size of the read buffer, in bytes.</param>
		/// <param name="lpBytesRead">Pointer to a variable that receives the number 
		/// of bytes read from the pipe.</param>
		/// <param name="nTimeOut">Number of milliseconds to wait for the 
		/// named pipe to be available.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool CallNamedPipe(
			string lpNamedPipeName,
			byte[] lpInBuffer,
			uint nInBufferSize,
			byte[] lpOutBuffer,
			uint nOutBufferSize,
			byte[] lpBytesRead,
			int nTimeOut
			);
		#region Comments
		/// <summary>
		/// Creates or opens a file, directory, physical disk, volume, console buffer, 
		/// tape drive, communications resource, mailslot, or named pipe.
		/// </summary>
		/// <param name="lpFileName">Pointer to a null-terminated string that 
		/// specifies the name of the object to create or open.</param>
		/// <param name="dwDesiredAccess">Access to the object (reading, writing, or both).</param>
		/// <param name="dwShareMode">Sharing mode of the object (reading, writing, both, or neither).</param>
		/// <param name="attr">Pointer to a 
		/// <see cref="AppModule.NamedPipes.SecurityAttributes">SecurityAttributes</see> 
		/// object that determines whether the returned handle can be inherited 
		/// by child processes.</param>
		/// <param name="dwCreationDisposition">Action to take on files that exist, 
		/// and which action to take when files do not exist.</param>
		/// <param name="dwFlagsAndAttributes">File attributes and flags.</param>
		/// <param name="hTemplateFile">Handle to a template file, with the GENERIC_READ access right.</param>
		/// <returns>If the function succeeds, the return value is an open handle to the specified file.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern IntPtr CreateFile(
			String lpFileName,						  // file name
			uint dwDesiredAccess,					  // access mode
			uint dwShareMode,								// share mode
			SecurityAttributes attr,				// SD
			uint dwCreationDisposition,			// how to create
			uint dwFlagsAndAttributes,			// file attributes
			uint hTemplateFile);					  // handle to template file
		#region Comments
		/// <summary>
		/// Reads data from a file, starting at the position indicated by the file pointer.
		/// </summary>
		/// <param name="hHandle">Handle to the file to be read.</param>
		/// <param name="lpBuffer">Pointer to the buffer that receives the data read from the file.</param>
		/// <param name="nNumberOfBytesToRead">Number of bytes to be read from the file.</param>
		/// <param name="lpNumberOfBytesRead">Pointer to the variable that receives the number of bytes read.</param>
		/// <param name="lpOverlapped">Pointer to an 
		/// <see cref="AppModule.NamedPipes.Overlapped">Overlapped</see> object.</param>
		/// <returns>The ReadFile function returns when one of the following 
		/// conditions is met: a write operation completes on the write end of 
		/// the pipe, the number of bytes requested has been read, or an error occurs.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool ReadFile(
			IntPtr hHandle,											// handle to file
			byte[] lpBuffer,								// data buffer
			uint nNumberOfBytesToRead,			// number of bytes to read
			byte[] lpNumberOfBytesRead,			// number of bytes read
			uint lpOverlapped								// overlapped buffer
			);
		#region Comments
		/// <summary>
		/// Writes data to a file at the position specified by the file pointer.
		/// </summary>
		/// <param name="hHandle">Handle to the file.</param>
		/// <param name="lpBuffer">Pointer to the buffer containing the data to be written to the file.</param>
		/// <param name="nNumberOfBytesToWrite"></param>
		/// <param name="lpNumberOfBytesWritten">Pointer to the variable that receives the number of bytes written.</param>
		/// <param name="lpOverlapped">Pointer to an 
		/// <see cref="AppModule.NamedPipes.Overlapped">Overlapped</see> object.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool WriteFile(
			IntPtr hHandle,											// handle to file
			byte[] lpBuffer,							  // data buffer
			uint nNumberOfBytesToWrite,			// number of bytes to write
			byte[] lpNumberOfBytesWritten,	// number of bytes written
			uint lpOverlapped								// overlapped buffer
			);
		#region Comments
		/// <summary>
		/// Retrieves information about a specified named pipe.
		/// </summary>
		/// <param name="hHandle">Handle to the named pipe for which information is wanted.</param>
		/// <param name="lpState">Pointer to a variable that indicates the current 
		/// state of the handle.</param>
		/// <param name="lpCurInstances">Pointer to a variable that receives the 
		/// number of current pipe instances.</param>
		/// <param name="lpMaxCollectionCount">Pointer to a variable that receives 
		/// the maximum number of bytes to be collected on the client's computer 
		/// before transmission to the server.</param>
		/// <param name="lpCollectDataTimeout">Pointer to a variable that receives 
		/// the maximum time, in milliseconds, that can pass before a remote named 
		/// pipe transfers information over the network.</param>
		/// <param name="lpUserName">Pointer to a buffer that receives the 
		/// null-terminated string containing the user name string associated 
		/// with the client application. </param>
		/// <param name="nMaxUserNameSize">Size of the buffer specified by the 
		/// lpUserName parameter.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool GetNamedPipeHandleState(
			IntPtr hHandle,
			IntPtr lpState,
			ref uint lpCurInstances,
			IntPtr lpMaxCollectionCount,
			IntPtr lpCollectDataTimeout,
			IntPtr lpUserName,
			IntPtr nMaxUserNameSize
			);
		#region Comments
		/// <summary>
		/// Cancels all pending input and output (I/O) operations that were 
		/// issued by the calling thread for the specified file handle.
		/// </summary>
		/// <param name="hHandle">Handle to a file.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool CancelIo(
			IntPtr hHandle
			);
		#region Comments
		/// <summary>
		/// Waits until either a time-out interval elapses or an instance 
		/// of the specified named pipe is available for connection.
		/// </summary>
		/// <param name="name">Pointer to a null-terminated string that specifies 
		/// the name of the named pipe.</param>
		/// <param name="timeout">Number of milliseconds that the function will 
		/// wait for an instance of the named pipe to be available.</param>
		/// <returns>If an instance of the pipe is available before the 
		/// time-out interval elapses, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool WaitNamedPipe(
			String name,
			int timeout);
		#region Comments
		/// <summary>
		/// Retrieves the calling thread's last-error code value.
		/// </summary>
		/// <returns>The return value is the calling thread's last-error code value.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern uint GetLastError();
		#region Comments
		/// <summary>
		/// Flushes the buffers of the specified file and causes all buffered data to be written to the file.
		/// </summary>
		/// <param name="hHandle">Handle to an open file.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool FlushFileBuffers(
			IntPtr hHandle);
		#region Comments
		/// <summary>
		/// Disconnects the server end of a named pipe instance from a client process.
		/// </summary>
		/// <param name="hHandle">Handle to an instance of a named pipe.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool DisconnectNamedPipe(
			IntPtr hHandle);
		#region Comments
		/// <summary>
		/// Sets the read mode and the blocking mode of the specified named pipe.
		/// </summary>
		/// <remarks>
		/// If the specified handle is to the client end of a named pipe and if 
		/// the named pipe server process is on a remote computer, the function 
		/// can also be used to control local buffering.
		/// </remarks>
		/// <param name="hHandle">Handle to the named pipe instance.</param>
		/// <param name="mode">Pointer to a variable that supplies the new mode.</param>
		/// <param name="cc">Pointer to a variable that specifies the maximum 
		/// number of bytes collected on the client computer before 
		/// transmission to the server.</param>
		/// <param name="cd">Pointer to a variable that specifies the 
		/// maximum time, in milliseconds, that can pass before a remote 
		/// named pipe transfers information over the network.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool SetNamedPipeHandleState(
			IntPtr hHandle,
			ref uint mode,
			IntPtr cc,
			IntPtr cd);
		#region Comments
		/// <summary>
		/// Closes an open object handle.
		/// </summary>
		/// <param name="hHandle">Handle to an open object.</param>
		/// <returns>If the function succeeds, the return value is nonzero.</returns>
		#endregion
		[DllImport("kernel32.dll", SetLastError=true)]
		public static extern bool CloseHandle(
			IntPtr hHandle);
		#region Comments
		/// <summary>
		/// Sets the security descriptor attributes
		/// </summary>
		/// <param name="sd">Reference to a SECURITY_DESCRIPTOR structure.</param>
		/// <param name="bDaclPresent"></param>
		/// <param name="Dacl"></param>
		/// <param name="bDaclDefaulted"></param>
		/// <returns></returns>
		#endregion
		[DllImport("Advapi32.dll", SetLastError=true)]
		public static extern bool SetSecurityDescriptorDacl(ref SECURITY_DESCRIPTOR sd, bool bDaclPresent, IntPtr Dacl, bool bDaclDefaulted);
		#region Comments
		/// <summary>
		/// Initializes a SECURITY_DESCRIPTOR structure.
		/// </summary>
		/// <param name="sd"></param>
		/// <param name="dwRevision"></param>
		/// <returns></returns>
		#endregion
		[DllImport("Advapi32.dll", SetLastError=true)]
		public static extern bool InitializeSecurityDescriptor(out SECURITY_DESCRIPTOR sd, int dwRevision);
		#region Comments
		/// <summary>
		/// Private constructor.
		/// </summary>
		#endregion
		private NamedPipeAPI() {}
	}
	#region Comments
	/// <summary>
	/// Security Descriptor structure
	/// </summary>
	#endregion
	[StructLayout(LayoutKind.Sequential)]
	public struct SECURITY_DESCRIPTOR 
	{
		private byte Revision;
		private byte Sbz1;
		private ushort Control;
		private IntPtr Owner;
		private IntPtr Group;
		private IntPtr Sacl;
		private IntPtr Dacl;
	}
	#region Comments
	/// <summary>
	/// Security Attributes structure.
	/// </summary>
	#endregion
	[StructLayout(LayoutKind.Sequential)]
	public struct SECURITY_ATTRIBUTES 
	{
		public int nLength;
		public IntPtr lpSecurityDescriptor;
		public bool bInheritHandle;
	}
	#region Comments
	/// <summary>
	/// This class is used as a dummy parameter only.
	/// </summary>
	#endregion
	[StructLayout(LayoutKind.Sequential)]
	public class Overlapped 
	{
	}
	#region Comments
	/// <summary>
	/// This class is used as a dummy parameter only.
	/// </summary>
	#endregion
	[StructLayout(LayoutKind.Sequential)]
	public class SecurityAttributes 
	{
	}
}