Re: [Ccrtp-devel] Understanding GPL and ccRTP

[David Sugar]

I was more concerned about the effect of the OpenSSL license in linking.
 Right now this has become a large issue in gnupg, because gnupg was
changed to link to libcurl for it's backend url engine, and libcurl may
either be linked with gnutls or openssl.  The problem was if libcurl
happened to use openssl as it's back end, then the licensing of gnupg,
which has no exception and does not advertise openssl the way openssh
does, is said to no longer be legally redistributable in combined
source/binary GNU/Linux distributions.  My concern is that if we change
the licensing to add an exception for openssl linking, would we cause
similar issues for things later built with libccrtp?  This was the issue
that concerned me.

Werner Dittmann wrote:
> David,
> 
> as I'm not very familiar with this license stuff I just want you to
> know that the original SRTP code is LGPL licensed. However, I did some
> testing (make it interoperable with other SRTP implementations) and
> additions to it, removing bugs, some code cleanup etc.
> 
> As for the ZRTP code: this was done entirely by myself. As a first
> shot I released it for minisip using their LGPL. If there is a requirement
> to change some stuff in this part please let me know.
> 
> Regards,
> Werner
> 
> David Sugar wrote:
>> At present we use essentially the same license as libstdc++ does in the
>> GNU Compiler Collection
>> (http://gcc.gnu.org/onlinedocs/libstdc++/17_intro/license.html).
>> However, we are looking how srtp additions will effect this.
>>
>> George A. Papayiannis wrote:
>>> Hi,
>>>
>>> I apologize for asking a question like this on a developers list, but
>>> I'm running out of options in understanding the implications of GPL on
>>> ccRTP.  I know that GPL requires all derivative works of GPL'd code
>>> must be GPL'd also.  But in the case of ccRTP, I would be using this
>>> code as a transport to a larger application.
>>>
>>> The question is, if I create a client/server application which uses
>>> ccRTP as the transport, do I need to license the entire client/server
>>> application under GPL?
>>>
>>> If anyone has any thoughts, I would really appreciate it.
>>> Thanks,
>>> George
>>>
>>>
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> 
> 
> 
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