[SR-Users] during registration nonce expired, after backwards time shift

Daniel-Constantin Mierla miconda at gmail.com
Thu Aug 20 10:05:27 CEST 2015


Hello,

probably the module is using the time computed internally as start time
plus elapsed seconds (counted internally). We can introduce an option to
use the system time, which may add a bit of delay, but really
insignificant. I will look into it these days.

Cheers,
Daniel


On 18/08/15 22:44, Vasiliy Ganchev wrote:
> Hi list! 
> (sorry for sending first mail to wrong sub forum)
> Have a following issue: 
> Server with Kamailio restart with wrong time (why - this is separate part of
> my investigations), timeshift e.g. for 2 hours in feature. 
> After ntp daemon adjust correct time (move time backwards), Kamailio do not
> accept REGISTERs, pv_www_authenticate answer with code -4 (nonce expired)
>
> I've reade the description of: 
> http://kamailio.org/docs/modules/4.2.x/modules/auth.html#auth.p.nonce_expire
> and 
> http://kamailio.org/docs/modules/4.2.x/modules/auth.html#auth.p.nonce_auth_max_drift
>
> This descriptions mention situation with backwards timeshift from future. 
> As I understand, Kamailio do not authorise the registration, whose nonces
> where generated in future (before ntp shifted the time). But in my tests,
> Kamailio do not accept even REGISTER from UA, sent after time shift (with
> new nonces, that as I expected has to use correct time for nonce generation,
> and be authorised with no problem). 
>
> Only Kamailio process restart help to cope with the issue. 
>
> It looks like for nonce generating Kamailio use old time (in feature, that
> was before timeshift). 
>
> I wander, does the Kamailio behave in described case - as is expected? If I
> am wrong in some of my assumptions, please point out. 
>
> version: kamailio 4.2.5 
>
> Thank in advance! 
> Cheers!
>
>
>
>
> --
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>
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-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
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