nSIP / nSDP Project Page

Recent News

nSDP2 - Now in planning
Thu, 17 Jan 2008 18:45:42 GMT

Because of the relatively new RFC 4566 for SDP, development on nSDP has stopped and nSDP2 is being planned for the new version. It begins design immediately, and there should be a roadmap up fairly soon for development. Look for some more information within the next couple of weeks!

Augie

New work on nSDP under way
Fri, 16 Mar 2007 05:37:44 GMT

After a depressingly long silence, I am glad to announce that new work is underway in nSDP. Development has been very very slow lately due to school and other factors; also I seem to be the only active coder left on this project. Either way, the project will go on.

The new work on nSDP mostly consists of tests to ensure consistency and compliance with the standards. It has come to my attention that some of the parsing is fairly shoddy and not exactly true to RFC 2327, so my little project right now is to fix that up and get out a new version. Hopefully this goes quickly. Oh, and I refuse to give release-time estimates now :)

Still working...
Fri, 15 Sep 2006 03:34:00 GMT

This is just a notice to all of those interested in the project that we are still working to be the first open source .NET SIP stack. We also plan to write up some core code for fully functioning UAs (with an API similar to TAPI maybe, but I'd like some feedback on this first. We'd like to create something familiar and easy to use and in order to do that we need to hear from people who are familiar with this kind of development.)

In other news, I have just submitted the project to the Johns Hopkins ACM hackathon, so we can expect completion in a reasonable amount of time. By the end of 2006 we should have complete RFC 3261 support and maybe some support for supplementary RFCs. We might even draft some UAs to try and toy with designs.

As always your feedback is not only appreciated, it is necessary to the survival and success of this project, so please don't hesitate to drop me a line.

nSip SVN Transfer Success
Mon, 12 Jun 2006 02:33:11 GMT

The SVN of the nSip project now reflects the actual history of the files. This sounds trivial, but it took quite a while, since I've never done anything like this before. Through the use of rsync, svnadmin dump, svndumpfilter, and sourceforge's migration from svn dumpfile service, the data before stored in the gibphone SVN is now here in its new home in nSip.

Notable is the use of --drop-empty-revs and --renumber-revs, which means that nSip will 'start' on revision 123, since a number of the previous revisions were dropped, and it seems more elegant to have the numbers contiguous.

Also notable is that ex-folders like SIP.NET and SDP.NET were brought in as well. If you look at revision 100, for example, the familiar nSip does not yet exist, but the others do.

In short, the transfer was successful. I just felt it warranted a newspost because it took quite a bit of time and effort.

-Marc

nSIP Under New Management!
Sat, 10 Jun 2006 01:58:32 GMT

After much inactivity, nSIP is under new management! nSIP will still be the first free and open source SIP stack for the .NET framework as it has promised, but now all development has been taken over by the makers of GibPhone.

For now we'll mostly be moving over all SIP relating projects from the GibPhone page over here, but look for some new work very soon. We are making much headway and the project is expected to be completed soon. We already have a functional SDP parser and SIP parser; the only thing left is stateful transaction management and transport.

As always, any and all feedback is much appreciated!

What is nSIP / nSDP?

The vision of this project is to create a simple, correct, and consistent open source .NET 2.0 impelementation of the Session Initiation Protocol (RFC 3261) and the Session Description Protocol (RFC 4566). The API will be a complete and well-documented interface that describes concepts intuitively derived from the specifications. The results of this effort are designed to be of interest to .NET application developers looking to incorporate session-oriented communication functionality in their programs.

What can I do with nSIP / nSDP?

nSIP and nSDP are designed to serve two distinct purposes. The first is to allow applications to parse and understand SIP and SDP data and present it in a way that is useful to the developer. The second is to allow the developer to easily create valid SIP and SDP data. Both of these purposes allow .NET applications to communicate with other SIP- and SDP-enabled applications and devices, such as Cisco and Asterisk VoIP phones and PBX's.

How do I use nSIP / nSDP?

The output of this project is two .NET assemblies, which can be downloaded along with their source here. One dll provides support for SIP and the other provides support for SDP. The easiest way to use them is to just add them as references to your .NET project. More detailed instructions regarding the use of the API can be found in the documentation.