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//
// System.Runtime.Remoting.Channels.Ipc.Win32.NamedPipeClient.cs
//
// Author: Robert Jordan (robertj@gmx.net)
//
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Runtime.InteropServices;
namespace System.Runtime.Remoting.Channels.Ipc.Win32
{
/// <summary>
/// Provides client connections for local Named Pipes.
/// </summary>
internal class NamedPipeClient
{
readonly string pipeName;
public string Name
{
get { return pipeName; }
}
/// <summary>
/// Creates a new instance with the local Named Pipe name specified as an unique ID.
/// </summary>
/// <param name="uid">The Guid.</param>
public NamedPipeClient(Guid uid)
: this(uid.ToString("N"))
{
}
/// <summary>
/// Creates a new instance for the specified pipe name.
/// </summary>
/// <param name="pipeName">The pipe name omiting the leading <c>\\.\pipe\</c></param>
public NamedPipeClient(string pipeName)
{
this.pipeName = NamedPipeHelper.FormatPipeName(pipeName);
}
/// <summary>
/// Connects to a local Named Pipe server.
/// </summary>
/// <returns>The NamedPipeSocket</returns>
public NamedPipeSocket Connect()
{
return Connect(2000);
}
/// <summary>
/// Connects to a local Named Pipe server.
/// </summary>
/// <param name="timeout">Timeout in millisecons to wait for the connection.</param>
/// <returns></returns>
public NamedPipeSocket Connect(int timeout)
{
while (true)
{
IntPtr hPipe = NamedPipeHelper.CreateFile(
pipeName,
NamedPipeHelper.GENERIC_READ |
NamedPipeHelper.GENERIC_WRITE,
0,
IntPtr.Zero,
NamedPipeHelper.OPEN_EXISTING,
0,
IntPtr.Zero
);
if (hPipe.ToInt32() == NamedPipeHelper.INVALID_HANDLE_VALUE)
{
int lastError = Marshal.GetLastWin32Error();
if (lastError != NamedPipeHelper.ERROR_PIPE_BUSY)
throw new NamedPipeException(lastError);
if (!NamedPipeHelper.WaitNamedPipe(pipeName, timeout))
{
throw new NamedPipeException();
}
}
else
{
return new NamedPipeSocket(hPipe);
}
}
}
}
}
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