----- Original Message ----- From: "Jeremy Jackson" <[EMAIL PROTECTED]> To: "Asterisk Security Discussion" <[email protected]> Sent: Wednesday, August 24, 2005 10:40 AM Subject: Re: [Asterisk-Security] SRTP vs IPSEC
> Enzo Michelangeli wrote: [...] > >Why? Asterisk is GPL'd too... > > > > > We all wish it was. Well, the README file in the distribution says so, although it keeps open the possibility of other types of licenses in addition to the GPL _only_ for the modules under Digium's copyright: --------------- * LICENSING Asterisk is distributed under GNU General Public License and is also available under alternative licenses negotiated directly with Digium, Inc. If you obtained Asterisk under the GPL, then the GPL applies to all loadable modules used on your system as well, except as defined below. Digium, Inc. (formerly Linux Support Services) retains copyright and/or a sufficient license to all components of the core Asterisk system, and therefore can grant, at its sole discretion, the ability for companies, individuals, or organizations to create proprietary or Open Source (but non-GPL'd) modules which may be dynamically linked at runtime with the portions of Asterisk which fall under our copyright/license umbrella, or are distributed under more flexible licenses than GPL. If you wish to use our code in other GPL programs, don't worry -- there is no requirement that you provide the same exception in your GPL'd products (although if you've written a module for Asterisk we would strongly encourage you to make the same exception that we do). [...] --------------- This dual-licensing style is not uncommon, and I can't see any reason why linking Asterisk with GPL'd code should create legal difficulties on either side... The only problems may arise if licensees under closed-source terms will want to use the GPL's SRTP module. In that case, they will have to either develop their own, or negotiate terms with the copyright holder of the GPL'd SRTP implementation (a copyright holder _always_ retains the right of re-licensing his/her work under different terms, GPL or not). Enzo _______________________________________________ Asterisk-Security mailing list [email protected] http://lists.digium.com/mailman/listinfo/asterisk-security
