[SR-Users] CRLF from Kamailio server

[Klaus Darilion]

forwarded to mailing-list ....


-------- Original Message --------
Subject: Re: [SR-Users] CRLF from Kamailio server
Date: Mon, 26 Nov 2012 16:34:26 +0100
From: Daniel-Constantin Mierla <miconda at gmail.com>
Reply-To: miconda at gmail.com
To: Klaus Darilion <klaus.mailinglists at pernau.at>

Hello,

I haven't checked actually the parts for tcp, but recently I added the
feature of removing the location records if there is no reply to OPTIONS
keepalives in nathelper, and it was only for UDP. Also, I think the nat
ping is 4 bytes (zeros) or so.

Might be another option from tcp, like:
http://www.kamailio.org/wiki/cookbooks/3.3.x/core#tcp_keepalive

Cheers,
Daniel


On 11/26/12 3:54 PM, Klaus Darilion wrote:
> IIRC tcp_crlf_ping is only about the Ping-Pong mechanism: client sends
> PING=CRLF, server responds with PONG=CRLFCRLF.
>
> Thus, server should only response on client CRLF. Further the PONG is
> always double-CRLF.
>
> So I suspected it is NAT keepalive - maybe someone added
> NAT-keep-alive for TCP :-)
>
> regards
> Klaus
>
> On 26.11.2012 11:05, Daniel-Constantin Mierla wrote:
>> Hello,
>>
>> this might be actually related to tcp connection keepalive:
>>
>> http://www.kamailio.org/wiki/cookbooks/3.3.x/core#tcp_crlf_ping
>>
>> IIRC, nathelper pings only udp contacts.
>>
>> Cheers,
>> Daniel
>>
>> On 11/26/12 10:54 AM, Klaus Darilion wrote:
>>>
>>>
>>> On 26.11.2012 05:13, Dmytro Bogovych wrote:
>>>> Greetings.
>>>> May anyone give me advice?
>>>> I have working Kamailio with TLS.
>>>> It is used by iOS softphone - i developed own one based on
>>>> resiprocate.
>>>> All signalling is TLS.
>>>> Almost everything is fine.
>>>>
>>>> But looks kamailio sends CRLF messages sometimes.
>>>> If it happens when softphone is in background mode - it is killed
>>>> by iOS
>>>>   (as iOS prohibits too often awakes from background mode).
>>>>
>>>> How I can disable these messages?
>>>> I see natping_interval = 30 and ping_nated_only=0
>>>> Should I set natping_interval to zero ?
>>>
>>> Either set the interval to 0 or set ping_nated_only=1 and make sure to
>>> not set the NAT flag for the iphone clients.
>>>
>>> A problem may be firewalls/NAT between the iPhone and Kamailio, as
>>> they may drop the TCP connection is there is no activity for too long
>>> time.
>>>
>>> regards
>>> Klaus
>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>> sr-users at lists.sip-router.org
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>>

-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda