OpenMoko application as Final Year Project
alexey at feldgendler.ru
Fri Sep 28 13:40:06 CEST 2007
On Fri, 28 Sep 2007 12:39:25 +0200, Ferran Orsola <forsola at gmail.com>
> What it can make a huge different for a mobile is a application that
> allow that mobile to talk using skypo protocol.
> As you should kn ow skype used a private protocol and it is not and
> So I suggest to you to snnifer a full conversation and try to copy this
> protocol and the application to create a opensource project compatible
> with skype for openmoko (if this has not been deployed).
This has been tried many times by different people. Unfortunately, the
Skype protocol turned out to be exceptionally hard to reverse-engineer.
Even though someone did claim that they managed to do it, there wasn't
ever a workable alternative client presented to the public based on the
results from reverse engineering. So far all existing alternative clients,
SIP gateways etc run the original Skype binary in the background to handle
the actual calls, which is unreliable, has an incredible performance
overhead, and is only possible on Intel CPUs for which Skype makes the
I also doubt that implementing a Skype client is a good idea for a project
like OpenMoko, even if it's technically feasible. Skype is a closed-source
solution locking you in to their paid services without an alternative.
Even if the protocol eventually gets reverse engineered, and alternative
clients emerge, Skype can always find ways to break them by slightly
changing the protocol. That's what in reality happens with Mirabillis'
instant messenger, ICQ, for which many alternative clients based on the
reverse engineered protocol are available. It has already happened several
times that Mirabillis introduced slight changes to the protocol breaking
at least some of the alternative clients without breaking their own
(Mirabillis is interested in everyone using their client because it
On the other hand, the SIP protocol is fully open, has numerous
interoperable client and server implementations, including multiple brands
of hardware SIP telephones, stimulates a healthy competition between
providers of paid landline gateways, plays nice with XMPP (Jabber), etc.
Alexey Feldgendler <alexey at feldgendler.ru>
[ICQ: 115226275] http://feldgendler.livejournal.com
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