591 lines
22 KiB
C#
591 lines
22 KiB
C#
/***********************************************************************
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*
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* Copyright (C) 2005-2006 Novell, Inc. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; version 2.1
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* of the License.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, Novell, Inc.
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*
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* To contact Novell about this file by physical or electronic mail,
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* you may find current contact information at www.novell.com.
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*
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***********************************************************************/
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using System;
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using System.Security;
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using System.Runtime.InteropServices;
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namespace AppModule.NamedPipes {
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#region Comments
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/// <summary>
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/// This utility class exposes kernel32.dll methods for named pipes communication.
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/// </summary>
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/// <remarks>
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/// Use the following links for complete information about the exposed methods:
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/// <list type="bullet">
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/// <item>
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/// <description><a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ipc/base/pipe_functions.asp" target="_blank">Named Pipe Functions</a></description>
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/// </item>
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/// <item>
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/// <description><a href="http://msdn.microsoft.com/library/en-us/fileio/base/file_management_functions.asp" target="_blank">File Management Functions</a></description>
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/// </item>
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/// <item>
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/// <description><a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/handle_and_object_functions.asp" target="_blank">Handle and Object Functions</a></description>
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/// </item>
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/// <item>
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/// <description><a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/debug/base/system_error_codes.asp" target="_blank">System Error Codes</a></description>
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/// </item>
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/// </list>
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/// </remarks>
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#endregion
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[SuppressUnmanagedCodeSecurity]
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public sealed class NamedPipeNative {
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#region Comments
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/// <summary>
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/// Outbound pipe access.
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/// </summary>
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#endregion
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public const uint PIPE_ACCESS_OUTBOUND = 0x00000002;
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#region Comments
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/// <summary>
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/// Duplex pipe access.
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/// </summary>
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#endregion
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public const uint PIPE_ACCESS_DUPLEX = 0x00000003;
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#region Comments
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/// <summary>
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/// Inbound pipe access.
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/// </summary>
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#endregion
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public const uint PIPE_ACCESS_INBOUND = 0x00000001;
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#region Comments
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/// <summary>
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/// Pipe blocking mode.
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/// </summary>
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#endregion
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public const uint PIPE_WAIT = 0x00000000;
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#region Comments
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/// <summary>
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/// Pipe non-blocking mode.
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/// </summary>
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#endregion
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public const uint PIPE_NOWAIT = 0x00000001;
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#region Comments
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/// <summary>
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/// Pipe read mode of type Byte.
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/// </summary>
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#endregion
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public const uint PIPE_READMODE_BYTE = 0x00000000;
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#region Comments
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/// <summary>
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/// Pipe read mode of type Message.
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/// </summary>
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#endregion
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public const uint PIPE_READMODE_MESSAGE = 0x00000002;
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#region Comments
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/// <summary>
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/// Byte pipe type.
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/// </summary>
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#endregion
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public const uint PIPE_TYPE_BYTE = 0x00000000;
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#region Comments
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/// <summary>
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/// Message pipe type.
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/// </summary>
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#endregion
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public const uint PIPE_TYPE_MESSAGE = 0x00000004;
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#region Comments
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/// <summary>
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/// Pipe client end.
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/// </summary>
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#endregion
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public const uint PIPE_CLIENT_END = 0x00000000;
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#region Comments
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/// <summary>
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/// Pipe server end.
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/// </summary>
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#endregion
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public const uint PIPE_SERVER_END = 0x00000001;
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#region Comments
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/// <summary>
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/// Unlimited server pipe instances.
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/// </summary>
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#endregion
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public const uint PIPE_UNLIMITED_INSTANCES = 255;
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#region Comments
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/// <summary>
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/// Waits indefinitely when connecting to a pipe.
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/// </summary>
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#endregion
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public const uint NMPWAIT_WAIT_FOREVER = 0xffffffff;
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#region Comments
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/// <summary>
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/// Does not wait for the named pipe.
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/// </summary>
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#endregion
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public const uint NMPWAIT_NOWAIT = 0x00000001;
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#region Comments
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/// <summary>
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/// Uses the default time-out specified in a call to the CreateNamedPipe method.
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/// </summary>
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#endregion
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public const uint NMPWAIT_USE_DEFAULT_WAIT = 0x00000000;
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#region Comments
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/// <summary>
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///
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/// </summary>
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#endregion
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public const uint GENERIC_READ = (0x80000000);
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#region Comments
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/// <summary>
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/// Generic write access to the pipe.
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/// </summary>
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#endregion
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public const uint GENERIC_WRITE = (0x40000000);
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#region Comments
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/// <summary>
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/// Generic execute access to the pipe.
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/// </summary>
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#endregion
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public const uint GENERIC_EXECUTE = (0x20000000);
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#region Comments
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/// <summary>
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/// Read, write, and execute access.
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/// </summary>
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#endregion
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public const uint GENERIC_ALL = (0x10000000);
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#region Comments
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/// <summary>
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/// Create new file. Fails if the file exists.
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/// </summary>
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#endregion
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public const uint CREATE_NEW = 1;
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#region Comments
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/// <summary>
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/// Create new file. Overrides an existing file.
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/// </summary>
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#endregion
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public const uint CREATE_ALWAYS = 2;
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#region Comments
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/// <summary>
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/// Open existing file.
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/// </summary>
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#endregion
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public const uint OPEN_EXISTING = 3;
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#region Comments
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/// <summary>
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/// Open existing file. If the file does not exist, creates it.
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/// </summary>
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#endregion
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public const uint OPEN_ALWAYS = 4;
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#region Comments
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/// <summary>
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/// Opens the file and truncates it so that its size is zero bytes.
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/// </summary>
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#endregion
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public const uint TRUNCATE_EXISTING = 5;
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#region Comments
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/// <summary>
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/// Invalid operating system handle.
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/// </summary>
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#endregion
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public const int INVALID_HANDLE_VALUE = -1;
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#region Comments
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/// <summary>
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/// The operation completed successfully.
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/// </summary>
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#endregion
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public const ulong ERROR_SUCCESS = 0;
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#region Comments
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/// <summary>
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/// The system cannot find the file specified.
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/// </summary>
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#endregion
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public const ulong ERROR_CANNOT_CONNECT_TO_PIPE = 2;
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#region Comments
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/// <summary>
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/// All pipe instances are busy.
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/// </summary>
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#endregion
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public const ulong ERROR_PIPE_BUSY = 231;
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#region Comments
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/// <summary>
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/// The pipe is being closed.
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/// </summary>
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#endregion
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public const ulong ERROR_NO_DATA = 232;
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#region Comments
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/// <summary>
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/// No process is on the other end of the pipe.
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/// </summary>
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#endregion
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public const ulong ERROR_PIPE_NOT_CONNECTED = 233;
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#region Comments
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/// <summary>
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/// More data is available.
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/// </summary>
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#endregion
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public const ulong ERROR_MORE_DATA = 234;
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#region Comments
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/// <summary>
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/// There is a process on other end of the pipe.
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/// </summary>
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#endregion
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public const ulong ERROR_PIPE_CONNECTED = 535;
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#region Comments
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/// <summary>
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/// Waiting for a process to open the other end of the pipe.
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/// </summary>
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#endregion
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public const ulong ERROR_PIPE_LISTENING = 536;
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#region Comments
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/// <summary>
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/// Creates an instance of a named pipe and returns a handle for
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/// subsequent pipe operations.
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/// </summary>
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/// <param name="lpName">Pointer to the null-terminated string that
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/// uniquely identifies the pipe.</param>
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/// <param name="dwOpenMode">Pipe access mode, the overlapped mode,
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/// the write-through mode, and the security access mode of the pipe handle.</param>
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/// <param name="dwPipeMode">Type, read, and wait modes of the pipe handle.</param>
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/// <param name="nMaxInstances">Maximum number of instances that can be
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/// created for this pipe.</param>
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/// <param name="nOutBufferSize">Number of bytes to reserve for the output buffer.</param>
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/// <param name="nInBufferSize">Number of bytes to reserve for the input buffer.</param>
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/// <param name="nDefaultTimeOut">Default time-out value, in milliseconds.</param>
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/// <param name="pipeSecurityDescriptor">Pointer to a
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/// <see cref="AppModule.NamedPipes.SECURITY_ATTRIBUTES">SECURITY_ATTRIBUTES</see>
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/// object that specifies a security descriptor for the new named pipe.</param>
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/// <returns>If the function succeeds, the return value is a handle
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/// to the server end of a named pipe instance.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern IntPtr CreateNamedPipe(
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String lpName, // pipe name
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uint dwOpenMode, // pipe open mode
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uint dwPipeMode, // pipe-specific modes
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uint nMaxInstances, // maximum number of instances
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uint nOutBufferSize, // output buffer size
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uint nInBufferSize, // input buffer size
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uint nDefaultTimeOut, // time-out interval
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IntPtr pipeSecurityDescriptor // SD
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);
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#region Comments
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/// <summary>
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/// Enables a named pipe server process to wait for a client
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/// process to connect to an instance of a named pipe.
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/// </summary>
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/// <param name="hHandle">Handle to the server end of a named pipe instance.</param>
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/// <param name="lpOverlapped">Pointer to an
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/// <see cref="AppModule.NamedPipes.Overlapped">Overlapped</see> object.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool ConnectNamedPipe(
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IntPtr hHandle, // handle to named pipe
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Overlapped lpOverlapped // overlapped structure
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);
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#region Comments
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/// <summary>
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/// Connects to a message-type pipe (and waits if an instance of the
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/// pipe is not available), writes to and reads from the pipe, and then closes the pipe.
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/// </summary>
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/// <param name="lpNamedPipeName">Pointer to a null-terminated string
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/// specifying the pipe name.</param>
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/// <param name="lpInBuffer">Pointer to the buffer containing the data written
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/// to the pipe.</param>
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/// <param name="nInBufferSize">Size of the write buffer, in bytes.</param>
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/// <param name="lpOutBuffer">Pointer to the buffer that receives the data
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/// read from the pipe.</param>
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/// <param name="nOutBufferSize">Size of the read buffer, in bytes.</param>
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/// <param name="lpBytesRead">Pointer to a variable that receives the number
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/// of bytes read from the pipe.</param>
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/// <param name="nTimeOut">Number of milliseconds to wait for the
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/// named pipe to be available.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool CallNamedPipe(
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string lpNamedPipeName,
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byte[] lpInBuffer,
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uint nInBufferSize,
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byte[] lpOutBuffer,
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uint nOutBufferSize,
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byte[] lpBytesRead,
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int nTimeOut
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);
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#region Comments
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/// <summary>
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/// Creates or opens a file, directory, physical disk, volume, console buffer,
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/// tape drive, communications resource, mailslot, or named pipe.
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/// </summary>
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/// <param name="lpFileName">Pointer to a null-terminated string that
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/// specifies the name of the object to create or open.</param>
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/// <param name="dwDesiredAccess">Access to the object (reading, writing, or both).</param>
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/// <param name="dwShareMode">Sharing mode of the object (reading, writing, both, or neither).</param>
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/// <param name="attr">Pointer to a
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/// <see cref="AppModule.NamedPipes.SecurityAttributes">SecurityAttributes</see>
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/// object that determines whether the returned handle can be inherited
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/// by child processes.</param>
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/// <param name="dwCreationDisposition">Action to take on files that exist,
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/// and which action to take when files do not exist.</param>
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/// <param name="dwFlagsAndAttributes">File attributes and flags.</param>
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/// <param name="hTemplateFile">Handle to a template file, with the GENERIC_READ access right.</param>
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/// <returns>If the function succeeds, the return value is an open handle to the specified file.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern IntPtr CreateFile(
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String lpFileName, // file name
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uint dwDesiredAccess, // access mode
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uint dwShareMode, // share mode
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SecurityAttributes attr, // SD
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uint dwCreationDisposition, // how to create
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uint dwFlagsAndAttributes, // file attributes
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uint hTemplateFile); // handle to template file
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#region Comments
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/// <summary>
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/// Reads data from a file, starting at the position indicated by the file pointer.
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/// </summary>
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/// <param name="hHandle">Handle to the file to be read.</param>
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/// <param name="lpBuffer">Pointer to the buffer that receives the data read from the file.</param>
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/// <param name="nNumberOfBytesToRead">Number of bytes to be read from the file.</param>
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/// <param name="lpNumberOfBytesRead">Pointer to the variable that receives the number of bytes read.</param>
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/// <param name="lpOverlapped">Pointer to an
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/// <see cref="AppModule.NamedPipes.Overlapped">Overlapped</see> object.</param>
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/// <returns>The ReadFile function returns when one of the following
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/// conditions is met: a write operation completes on the write end of
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/// the pipe, the number of bytes requested has been read, or an error occurs.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool ReadFile(
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IntPtr hHandle, // handle to file
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byte[] lpBuffer, // data buffer
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uint nNumberOfBytesToRead, // number of bytes to read
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byte[] lpNumberOfBytesRead, // number of bytes read
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uint lpOverlapped // overlapped buffer
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);
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#region Comments
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/// <summary>
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/// Writes data to a file at the position specified by the file pointer.
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/// </summary>
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/// <param name="hHandle">Handle to the file.</param>
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/// <param name="lpBuffer">Pointer to the buffer containing the data to be written to the file.</param>
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/// <param name="nNumberOfBytesToWrite"></param>
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/// <param name="lpNumberOfBytesWritten">Pointer to the variable that receives the number of bytes written.</param>
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/// <param name="lpOverlapped">Pointer to an
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/// <see cref="AppModule.NamedPipes.Overlapped">Overlapped</see> object.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool WriteFile(
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IntPtr hHandle, // handle to file
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byte[] lpBuffer, // data buffer
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uint nNumberOfBytesToWrite, // number of bytes to write
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byte[] lpNumberOfBytesWritten, // number of bytes written
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uint lpOverlapped // overlapped buffer
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);
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#region Comments
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/// <summary>
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/// Retrieves information about a specified named pipe.
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/// </summary>
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/// <param name="hHandle">Handle to the named pipe for which information is wanted.</param>
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/// <param name="lpState">Pointer to a variable that indicates the current
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/// state of the handle.</param>
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/// <param name="lpCurInstances">Pointer to a variable that receives the
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/// number of current pipe instances.</param>
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/// <param name="lpMaxCollectionCount">Pointer to a variable that receives
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/// the maximum number of bytes to be collected on the client's computer
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/// before transmission to the server.</param>
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/// <param name="lpCollectDataTimeout">Pointer to a variable that receives
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/// the maximum time, in milliseconds, that can pass before a remote named
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/// pipe transfers information over the network.</param>
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/// <param name="lpUserName">Pointer to a buffer that receives the
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/// null-terminated string containing the user name string associated
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/// with the client application. </param>
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/// <param name="nMaxUserNameSize">Size of the buffer specified by the
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/// lpUserName parameter.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool GetNamedPipeHandleState(
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IntPtr hHandle,
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IntPtr lpState,
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ref uint lpCurInstances,
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IntPtr lpMaxCollectionCount,
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IntPtr lpCollectDataTimeout,
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IntPtr lpUserName,
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IntPtr nMaxUserNameSize
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);
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#region Comments
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/// <summary>
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/// Cancels all pending input and output (I/O) operations that were
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/// issued by the calling thread for the specified file handle.
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/// </summary>
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/// <param name="hHandle">Handle to a file.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool CancelIo(
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IntPtr hHandle
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);
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#region Comments
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/// <summary>
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/// Waits until either a time-out interval elapses or an instance
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/// of the specified named pipe is available for connection.
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/// </summary>
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/// <param name="name">Pointer to a null-terminated string that specifies
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/// the name of the named pipe.</param>
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/// <param name="timeout">Number of milliseconds that the function will
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/// wait for an instance of the named pipe to be available.</param>
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/// <returns>If an instance of the pipe is available before the
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/// time-out interval elapses, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool WaitNamedPipe(
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String name,
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int timeout);
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#region Comments
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/// <summary>
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/// Retrieves the calling thread's last-error code value.
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/// </summary>
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/// <returns>The return value is the calling thread's last-error code value.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern uint GetLastError();
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#region Comments
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/// <summary>
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/// Flushes the buffers of the specified file and causes all buffered data to be written to the file.
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/// </summary>
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/// <param name="hHandle">Handle to an open file.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
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public static extern bool FlushFileBuffers(
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IntPtr hHandle);
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#region Comments
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/// <summary>
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/// Disconnects the server end of a named pipe instance from a client process.
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/// </summary>
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/// <param name="hHandle">Handle to an instance of a named pipe.</param>
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/// <returns>If the function succeeds, the return value is nonzero.</returns>
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#endregion
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[DllImport("kernel32.dll", SetLastError=true)]
|
|
public static extern bool DisconnectNamedPipe(
|
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IntPtr hHandle);
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#region Comments
|
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/// <summary>
|
|
/// Sets the read mode and the blocking mode of the specified named pipe.
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|
/// </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 NamedPipeNative() {}
|
|
}
|
|
#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 {
|
|
}
|
|
} |