[Freeswitch-users] extended FS as ZRTP client

[Assaf Dahary]

Following Mike's advise, I've compiled the latest FS version 1.6.7 on a Raspi-2 device with the zrtp libs and setup:
./configure --enable-zrtp.
I've enabled zrtp in vars.XML and in dialplan and tried to make a regular zrtp call with several zrtp clients but failed to make it happen.

The fs_CLI log shows the zrtp hash and there is a statement that zrtp is detected BUT no zrtp session is starting with HELLO or anything else. It looks like the ZRTP module is not active.
>From fs_CLI I get zrtp_enabled=false.

I've also recompiled with ver 1.7 with same results.

When I'm recompiling back with ver 1.4 then zrtp is working.

Is there any issue with fs 1.6.7 on raspi-2 using zrtp?

Regards

Assaf



On Mar 28, 2016, 18:13, at 18:13, Michael Jerris <mike at jerris.com> wrote:
>did you try and see if this is the case with a current release instead
>of the old one?
>
>> On Mar 28, 2016, at 8:14 AM, Assaf Dahary <adahary at gmail.com> wrote:
>> 
>> Hi,
>>  
>> I would like to use FS (multiple) as a ZRTP client register on a the
>main FS.
>>  
>> I have already managed to setup a Gateway with user/pass on the FS
>client and register it on the main FS for regular incoming/outgoing
>calls (without ZRTP).
>>  
>> To enable ZRTP calls I setup the FS client/main as follow:
>> None ZRTP SIP phone -> FS client -> NAT Internet -> FS main ->
>CSipSimple ZRTP enabled).
>>  
>> FS Client (ver 1.4) :
>> ZRTP enabled globally in VARS and in dialplan.
>> Media proxy disabled on both internal and external profiles and in
>dialplan.
>>  
>> FS Main (ver 1.4):
>> Media proxy enabled – including late negotiation.
>>  
>> I forced the FS client and the CSipSimple to use only PCMU codec to
>avoid transcoding.
>>  
>> The problem is that on a call from the SIP phone via the FS client
>there are always CRC errors on the ZRTP log.
>> Only if the FS main is set to disable media proxy then there are no
>CRC errors – but then it becomes a MITM with incompatible SASs.
>>  
>> From reading other posts about FS and ZRTP CRC errors I assume that
>it happens because the FS client is not creating a zrtp hash in the
>invite SDP.
>>  
>> So my question is how to make the FS client to generate the zrtp hash
>in the invite SDP to act as real ZRTP enabled client? 
>> I've already tried to set the FS client internal/external/dialplan
>with several zrtp configs with no success.
>>  
>> I would appreciate any tip to resolve this issue.
>>  
>> Regards
>>  
>> Assaf  
>>  
>>  
>> The client FS 
>>  
>>
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