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Re: [Linphone-developers] Failure to establish ZRTP sessions using linph

From: Guillaume Beraudo
Subject: Re: [Linphone-developers] Failure to establish ZRTP sessions using linphone-iphone built from source
Date: Fri, 18 Jan 2013 09:33:02 +0100
User-agent: Mutt/1.5.21 (2010-09-15)


On Thu, Jan 17, 2013 at 04:43:01PM -0500, Eli Burke wrote:
> I have compiled linphone-iphone from source, using "make all
> enable_gpl_third_parties=yes enable_zrtp=yes"  and am now trying to
> verify the functionality of the ZRTP integration. So far, I am not able
> to establish a ZRTP-secured connection (SRTP works fine).
> Has anyone successfully used linphone with ZRTP since Linphone 2.0 was
> released? I know ZRTP is not enabled in the App store version, so it
> would have to be tested using a version you've built yourself.


> Some additional background: we are using Freeswitch and can
> successfully establish ZRTP calls using the Groundwire app. When I try
> to call between Groundwire and Linphone, I either get an unprotected
> phone call, or if I set Groundwire to require ZRTP, it immediately
> hangs up. I also tried calling between two instances of Linphone, and
> got the 'insecure call' icon. (vs SRTP which showed the 'secure'
> padlock)

It is strange that you cannot call between two Linphone instances.
You should enable debug logs and check the ZRTP discution: you should see
that some HELLO packets are sent and received.
> Other notables: So far I have only tested in the Simulator, so it is
> possible ZRTP only works on live hardware.  and This is speculation,
> but to my untrained eye it looks like during an outbound call
> 'zrtp-hash' is not listed in the SDP header, and in an incoming call it
> is not being parsed.

We do not support this optionnal feature yet.
Patches welcomed :).

Guillaume Beraudo

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