[SR-Users] CRLF Error with tcp_crlf_ping

[Daniel-Constantin Mierla]

Hello,

On 3/23/12 3:15 PM, Jijo wrote:
> Hello,
>
> Yes it is sending CRLF after the second CRLF from client.
>
> Another thing is, Kamailio would send CRLF even if the second CRLF 
> come after few seconds.
>
> I believe we don't have any way to drop it ?

not really, in a stream protocol, such delays can appear due to 
congestions in some routers -- the apps just have to keep reading until 
a format error, packet is complete or connection is closed. Few seconds 
could be very common in between parts of large sip messages.

Are these sequential CRLFs causing problems?

Cheers,
Daniel

>
> Thanks
> Jijo
>
>
> On Fri, Mar 23, 2012 at 5:34 AM, Daniel-Constantin Mierla 
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>     Hello,
>
>     is kamailio sending crlf after the second crlf from the client?
>
>     There is no notion of a packet in a stream connection, even a sip
>     packet can be send char by char and the server has to assemble it
>     by keep reading in a local buffer until all is retrieved.
>
>     Cheers,
>     Daniel
>
>
>     On 3/23/12 1:50 AM, Jijo wrote:
>>     Hi
>>
>>     Sorry for the late reply,
>>
>>     I observed this issue when testing with broken TLS UA, which was
>>     sending CRLF in two packets instead of double CRLF in a single
>>     packet.
>>
>>     It is very easy to recreate using openssl s_client command ,
>>     where kamailio as server
>>
>>      openssl s_client -connect 192.168.2.151:5061
>>     <http://192.168.2.151:5061>  -CAfile serverCA.pem  -crlf
>>
>>
>>     After the connection established by the client, Press enter key
>>     two times from the key board, which will send CRLF in two packet
>>     to server and You would see CRLF replied back by Kamailio
>>
>>     Note:-crlf will send CR as CRLF in a single packet to server.
>>
>>     Thanks
>>     Jijo
>>
>>
>>
>>
>>
>>     On Sat, Mar 10, 2012 at 6:27 AM, Daniel-Constantin Mierla
>>     <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>>
>>         Hello,
>>
>>         looking at the code, it seems that CRLF is sent only after
>>         CRLFCRLF. Can you get a pcap for your case?
>>
>>         Cheers,
>>         Daniel
>>
>>         On Tue, Feb 28, 2012 at 5:28 PM, Jijo <realjijo at gmail.com
>>         <mailto:realjijo at gmail.com>> wrote:
>>
>>             Hi All.
>>
>>             As per the tcp_crlf_ping description, kamailio shall
>>             reply CRLF only when it receives "CRLF CRLF".  But In the
>>             3.1.0 version, if kamailio recieves "CRLF", it respond
>>             back CRLF.  Is this an expected behavior or an error?
>>
>>             Thanks
>>             Jijo
>>
>>             _______________________________________________
>>             SIP Express Router (SER) and Kamailio (OpenSER) -
>>             sr-users mailing list
>>             sr-users at lists.sip-router.org
>>             <mailto:sr-users at lists.sip-router.org>
>>             http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>>
>>
>>         -- 
>>         Daniel-Constantin Mierla
>>         http://www.asipto.com
>>
>>
>
>     -- 
>     Daniel-Constantin Mierla
>     Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
>     http://www.asipto.com/index.php/kamailio-advanced-training/
>
>

-- 
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
http://www.asipto.com/index.php/kamailio-advanced-training/

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.sip-router.org/pipermail/sr-users/attachments/20120324/d1bac4d5/attachment-0001.htm>