[Kamailio-Users] ERROR:core:receive_msg: no via found in reply

[Ovidiu Sas]

Hello Geoffrey,

With tcpdump, you can capture data in buffers and rotate the buffers
and keep only the latest 2-3 buffers (check the man page).
As soon as the error arise, you stop the traffic and your bogus
message should be in your last buffer.
Just an idea ...

Also, if your cps is not very high, you can print the callid of each
request/reply, and when the error arise, you can correlate it with the
callid.


Regards,
Ovidiu Sas

On Sun, Apr 12, 2009 at 8:06 AM, Geoffrey Mina <geoffreymina at gmail.com> wrote:
> Ovidiu,
> Thank you for your pointer.  I could capture all the SIP traffic, but
> it would be a LOT of data to sift through.  This machine processes
> hundreds of thousands of calls per day.  I have tried the error_route
> handler to see if it shows up there... fingers crossed.  I was unaware
> of that handler before now.
>
> Thanks for the info!
> Geoff
>
> On Sat, Apr 11, 2009 at 8:38 PM, Ovidiu Sas <osas at voipembedded.com> wrote:
>> How often do you get this error?
>> IIRC, last time when I got this type of error it was related to a
>> missing Via header into a SIP reply.
>> Can you capture/sniff the traffic and check if all the received
>> replies are sane (via header is present)?
>>
>> Another idea would be to capture the bogus message into the error_route:
>> http://www.kamailio.net/dokuwiki/doku.php/core-cookbook:1.5.x#error_route
>> and then print the message via $mb:
>> http://www.kamailio.net/dokuwiki/doku.php/pseudovariables:1.5.x#sip_message_buffer
>>
>> I haven't checked the code to see if this type of error will end up in
>> the error_route, but is it worth a try.
>> If it's not caught, please open a bug, because it should be.
>>
>>
>> Regards,
>> Ovidiu Sas
>>
>> On Sat, Apr 11, 2009 at 5:58 PM, Geoffrey Mina <geoffreymina at gmail.com> wrote:
>>> Tried adding that log into my onreply_route[1] block, but it didn't
>>> work.  I can't seem to figure out I can possibly capture the SIP
>>> message which is generating this error.  Any help would be much
>>> appreciated.
>>>
>>> On Fri, Apr 10, 2009 at 10:23 PM, Geoffrey Mina <geoffreymina at gmail.com> wrote:
>>>> Perhaps I should clarify what I am looking for a bit.  I am guessing
>>>> based on the log "no via found in reply" that I would need to check
>>>> for this condition in my onreply_route[1] block.
>>>>
>>>> Based on my knowledge of SIP, all reply responses are REQUIRED to have
>>>> a VIA header to ensure the response traverses the same path as the
>>>> request... correct?
>>>>
>>>> Would the following effectively deal with this condition, or would
>>>> sending a 500 error in response to a reply cause problems down stream?
>>>>
>>>> onreply_route[1]{
>>>>     if(!is_present_hf("Via")){
>>>>           sl_reply_error("500","No Via found in response.");
>>>>     }
>>>> }
>>>>
>>>> Thanks for anyone's assistance.
>>>> Geoff
>>>>
>>>> On Fri, Apr 10, 2009 at 12:02 PM, Geoffrey Mina <geoffreymina at gmail.com> wrote:
>>>>> Hello,
>>>>> I am seeing the following message repeatedly in my log file.  I am
>>>>> guessing I have a server or servers misbehaving.  Where might I be
>>>>> able to check for this error condition and log appropriately?  I have
>>>>> attached my current configuration file for reference.
>>>>>
>>>>> Thanks!
>>>>> Geoff
>>>>>
>>>>>
>>>>> Apr 10 11:45:40 atl-sipgateway2 /usr/local/sbin/kamailio[15487]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:45:42 atl-sipgateway2 /usr/local/sbin/kamailio[15490]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:45:46 atl-sipgateway2 /usr/local/sbin/kamailio[15490]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:45:50 atl-sipgateway2 /usr/local/sbin/kamailio[15507]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:45:54 atl-sipgateway2 /usr/local/sbin/kamailio[15497]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:45:58 atl-sipgateway2 /usr/local/sbin/kamailio[15491]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:46:02 atl-sipgateway2 /usr/local/sbin/kamailio[15490]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:46:06 atl-sipgateway2 /usr/local/sbin/kamailio[15485]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:46 atl-sipgateway2 /usr/local/sbin/kamailio[15485]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:47 atl-sipgateway2 /usr/local/sbin/kamailio[15486]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:48 atl-sipgateway2 /usr/local/sbin/kamailio[15507]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:50 atl-sipgateway2 /usr/local/sbin/kamailio[15503]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:54 atl-sipgateway2 /usr/local/sbin/kamailio[15492]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:47:58 atl-sipgateway2 /usr/local/sbin/kamailio[15485]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:48:02 atl-sipgateway2 /usr/local/sbin/kamailio[15490]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:48:06 atl-sipgateway2 /usr/local/sbin/kamailio[15491]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>> Apr 10 11:48:10 atl-sipgateway2 /usr/local/sbin/kamailio[15492]:
>>>>> ERROR:core:receive_msg: no via found in reply
>>>>>
>>>>
>>>
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