Hello, On Sun, Nov 27, 2011 at 6:21 PM, Ben Hughes wrote:

This is my basic understanding of the Serval architecture, please let me know if it's misguided:

- BATMAN is the underlying protocol that is used to connect nodes on the mesh

Correct at present. Ultimately DNA will include it's own custom mesh routing protocol that drives an overlay mesh so that operating system cooperation is not required, thus maximising portability. It will also support asynchronous and highly partitioned mesh networks.

- DNA is a layer on top of batman that lets you use claimed numbers (and a public/private key pair) to identify nodes on the batman mesh

Yes.

- when you make a mesh call, DNA resolves the number to a batman ip, and then attempts to establish a SIP connection (via asterix) to that address

That is right for now. The overlay mesh will change things a bit, but DNA will still do phone number to address resolution, it is just that the addresses will be 256 bit public keys instead of IPv4 based SIP addresses. SIP will go by the way side as well, to be replaced by something more suited to lossy wireless meshes.

I know that there's more to it than that (social verification of claimed numbers, bridging networks, DID etc) but is that basically correct?

If so, batman seems as though it's a vital (and complex) component in the stack. And from what I can tell, it seems pretty tied to *nix.

It is pretty tied to posix, not unix. Windows and practically every other operating system supports most of posix. There will be some OS specific code.

If I'm looking to port DNA to WP7, do I first need to port batman? Or put another way: is there any value in a batman-less DNA?

You do not need to first port BATMAN to produce something of value. In the long term, Serval will be based on the increasingly pluripotent Serval DNA daemon (which will probably get a rename from dna to servald or similar at some point), that will handle everything, and just need hooks to the audio and network channels on the host device. Thus a C# port of DNA is exceptionally valuable. It will also serve as a good basis for a port to Windows. Paul.

Cheers,

Ben

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