[asterisk-dev] Idea for GSoC: Support of PRACK in Asterisk

[Matt Riddell]

On 25/03/2009 1:25 p.m., Kevin P. Fleming wrote:
> Nic Bellamy wrote:
>
>> A question for the Digium guys: what kind of license would be required
>> in order to use a third-party SIP library in a new SIP stack? Would an
>> LGPL library be usable?
>
> I recently (as in a few months ago) went through the exercise of trying
> to use the Sofia stack's SDP parser/generator in chan_sip. It wasn't
> that hard to use, and it worked well.
>
> However, since it is licensed under the LGPL, incorporating the Sofia
> code *into* chan_sip won't work, as it doesn't fly with commercial
> licensing of Asterisk. *Linking* to an LGPL library outside Asterisk,
> though, is acceptable. In the case of the Sofia stack, this wasn't
> practical, because it's not widely packaged by Linux distributions, so
> it would be an inconvenience for users to have to download it from some
> place, compile it and install it just to have SIP support in Asterisk.
> Conversely, if we distributed it as part of Asterisk, even though it
> might be compiled and installed separately, we'd risk infringing on the
> 'spirit' of the LGPL by just using a build-time split to try to avoid it.

Couldn't we just do a get_ilbc type of script.

BTW: the pluggable RTP library in SVN is looking cool - maybe we could 
do the same for SIP?

-- 
Kind Regards,

Matt Riddell
Director
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