Is there a UPnP Library for .NET (C# or VB.NET)?

Question

I'm working on a P2P application, and I need to get it to communicate through NAT Routers / Firewalls using UPnP. However, it doesn't seem that the .NET Framework includes support for UPnP.

Is there a UPnP Library for .NET? C# or VB.NET?

UPDATE: I have since found the NATUPnP 1.0 Type Library (NATUPNP.DLL) COM Component that is part of Windows (since Windows XP) that allows you to easily setup/maintain Port Forwarding using UPnP.

I wrote an article with code samples here: .NET Framework: Communicate through NAT Router via UPnP (Universal Plug and Play)

Hey thank you for the exhaustive article and the project. I am trying it out and it works brilliantly on a 32bit Win7 system - however on a 64bit Win7 system, UPnPNATHelper.StaticPortMappings is always NULL. Would you have any insights on this? — saurabhj, Dec 07 '11 at 06:42
The link in Chris post has rotted. Here's a fresh link: https://pietschsoft.com/post/2009/02/05/net-framework-communicate-through-nat-router-via-upnp — John Dyer, May 21 '22 at 12:49

Aaron Murgatroyd · Answer 1 · 2022-05-22T14:13:23.793

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I have a written a fully Managed UPnP library around the microsoft UPnP Control Point COM objects, its available with full source and a demo project, you can download it from a GitHub repository here:

https://github.com/jogibear9988/ManagedUPnP

It supports full traversal of the UPnP description documents using an object heirachy and among other things is very easy to use.

edited May 22 '22 at 14:13

answered May 20 '11 at 05:59

Aaron Murgatroyd

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This looks very promising, I'll give this a go in my project. – jishi Aug 24 '11 at 13:13
it's nice, but the underlying objects seem broken. device finder never sends the discovery packet. – Garr Godfrey Dec 31 '16 at 21:15
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@Aaron Murgatroyd Your link is dead. Here's a git hub fork: https://github.com/jogibear9988/ManagedUPnP – John Dyer May 21 '22 at 12:42

score 21 · Accepted Answer · answered Dec 02 '08 at 04:57

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There is a COM library that's easy enough to access:

UPnP APIs Purpose

The UPnP™ framework enables dynamic networking of intelligent appliances, wireless devices, and PCs. There are two APIs for working with UPnP-certified devices:

The Control Point API, which consists of a set of COM interfaces used to find and control devices. The Device Host API, which consists of a set of COM interfaces used to implement devices that are hosted by a computer.

answered Dec 02 '08 at 04:57

Frank Krueger

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I wrote an article with code samples here: .NET Framework: Communicate through NAT Router via UPnP (Universal Plug and Play) - http://pietschsoft.com/post.aspx?id=31200e6d-4b61-48b8-a9cb-91e3dd8e97f3 – Chris Pietschmann Apr 15 '09 at 02:48
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@ChrisPietschmann link is dead as of Sept 14, 2012 – Urda Sep 14 '12 at 17:45
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@Urda, the link is working (again). The Wayback Machine link: http://web.archive.org/web/20130813184633/http://pietschsoft.com/post/2009/02/05/NET-Framework-Communicate-through-NAT-Router-via-UPnP – M. Mimpen Jan 13 '14 at 13:01

denied66 · Answer 3 · 2012-07-13T14:15:49.423

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Mono.Nat is a pretty good library for upnp, at least for my case I had less issues with it so far than when I was using NATUPnP.

You can download it here and you can find a decent tutorial on how to operate it at http://www.fluxbytes.com/csharp/upnp-port-forwarding-the-easy-way/

edited Jul 13 '12 at 14:15

answered Jul 13 '12 at 14:08

denied66

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score 5 · Answer 4 · answered Dec 13 '09 at 00:23

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This Intel UPnP tools have been re-released as open source tools at: http://opentools.homeip.net. The new tools are called the "Developer Tools for UPnP technologies". They are built in C# but there is a free code generator that will output C and C# stacks. The C stack will work on Windows and Linux.

Ylian

answered Dec 13 '09 at 00:23

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@user230486 Yilan, you really need to turn this stuff into a COM .dll or .ocx so people using VB6 or Delphi (or any other non.NET Win32 designer) can use all this work you've put into it. The current upnp.dll is a nightmare of a control and I wouldn't wish having to use it on my worst enemy, please create a Com Wrapper at least. – Erx_VB.NExT.Coder Sep 01 '12 at 17:33

score 5 · Answer 5 · answered Mar 01 '12 at 00:10

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Was looking around for this stuff personally and found::

mono-upnp:: https://github.com/mono/mono-upnp

Mono.Nat:: https://github.com/mono/Mono.Nat

answered Mar 01 '12 at 00:10

zezba9000

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score 3 · Answer 6 · answered Dec 06 '08 at 22:57

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I use this, which seems to work fine:

http://code.google.com/p/dotnetportmapper/

answered Dec 06 '08 at 22:57

Walt D

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score 3 · Answer 7 · answered Jan 02 '11 at 11:00

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If someone needs an easy library, I wrote a c# class library that uses the UPnPLib COM component. It has some basic functions to open and close ports. I haven't tested it on multiple platforms yet, but it works on Visual Studio 2010 in Windows 7. Feel free to download it at http://sourceforge.net/projects/easyupnp/

answered Jan 02 '11 at 11:00

cisv

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https://github.com/meehi/EasyUPnP – g.breeze Oct 20 '17 at 18:33

score 3 · Answer 8 · answered Feb 21 '11 at 17:38

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For NAT specifically there is Mono.Nat.

answered Feb 21 '11 at 17:38

James

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score 3 · Answer 9 · answered Feb 11 '09 at 00:24

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Intels UPNP Tools used to be able to export UPnP clients in C#. The suite is deprecated but ought still work.

answered Feb 11 '09 at 00:24

Is there a UPnP Library for .NET (C# or VB.NET)?

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