[sr-dev] Msrp module in Kamailio relays frame back to the source instead of target

Thu Nov 10 10:16:22 CET 2016

Hello,

for the future -- this kind of discussion is more suitable for sr-users
mailing list, because it is not related to kamailio development, but
using kamailio.

Can you get the log messages from syslog with debug=3 for this case,
from the moment of receiving the msrp frame till the end of its processing?

Cheers,
Daniel

On 09/11/16 15:06, Pranathi Venkatayogi wrote:
>
> Hi users of MSRP module,
>
>   I just set up MSRP module with Kamailio 4.4.3 & blink client on
> Windows. What I am noticing is messages are coming though one-way.
> When other side replies, they are relayed back to itself instead of
> target.
>
>   Msrp layer of the relayed packet is built fine, but tcp destination
> is set wrong.
>
>  
>
>   I am suspecting it is either due to wrong use of msrp_set_dst in
> Kamailio.cfg (attached) or a bug in msrp_relay method in the module
> itself.
>
>   I am new to this area, please suggest how to troubleshoot this.
>
>  
>
>   Find below the trace of msrp messages of the issue. My analysis of
> the msrp trace is *in purple*.
>
>  
>
>   *Some points to note:*
>
>          10.11.200.24 and 10.0.0.5 are nics on same box and are marked
> in same color as is called “source”.
>
>         10.11.52.53 is “target” machine, where the relayed message
> should go to.
>
>          10.0.16.51 is the relay server
>
>  
>
> *  Question to answer:***Why is Message3 below sent to source tcp ip
> address (10.11.200.24) instead of target tcp address (10.11.52.53).
>
> * *
>
> ----------------------------------------------------------------------------------------------------
>
> *Message1 is sent from source to target + relay session***
>
> *Message1:*2016-11-08 15:47:17.338892 [blink.exe 26372]:
> 10.11.200.24:62680 --> 10.0.16.51:2855
>
> MSRP 5f0c96c84796750d SEND
>
> To-Path: msrp://10.0.16.51:2855/s.12455.7.1628740562;tcp
> msrp://10.11.52.53:2855/b5e6018fca0bdddfcea2;tcp
>
> From-Path: msrp://10.0.0.5:62680/7549e765f173b8ae2250;tcp
>
> Message-ID: d54ab6cddfffb429
>
> Byte-Range: 1-375/375
>
> Success-Report: no
>
> Failure-Report: partial
>
> Content-Type: message/cpim
>
>  
>
> From: pvenkatayogi <sip:pvenkatayogi at labsip00.cyracom.com>
>
> To: <sip:pranathi at labsip00.cyracom.com>
>
> DateTime: 2016-11-08T15:47:17.336892-06:00
>
>  
>
> MIME-Version: 1.0
>
> Content-Type: application/im-iscomposing+xml
>
>  
>
> <?xml version='1.0' encoding='UTF-8'?>
>
> <isComposing
> xmlns="urn:ietf:params:xml:ns:im-iscomposing"><state>active</state><contenttype>text</contenttype></isComposing>
>
>  
>
> -------5f0c96c84796750d$
>
> *Message2 is sent from relay server to source with 200 OK***
>
> *Message2: *2016-11-08 15:47:17.418908 [blink.exe 26372]:
> 10.11.200.24:62680 <-- 10.0.16.51:2855
>
> MSRP 5f0c96c84796750d 200 OK
>
>  
>
> To-Path: msrp://10.0.0.5:62680/7549e765f173b8ae2250;tcp
>
> From-Path: msrp://10.0.16.51:2855/s.12455.7.1628740562;tcp
>
> Message-ID: d54ab6cddfffb429
>
>  
>
> -------5f0c96c84796750d$
>
>  
>
> *Message3 is **wrongly sent to source**, though the to-path in msrp
> packet is pointing to target.***
>
> *Message3: *2016-11-08 15:47:17.423909 [blink.exe 26372]:
> 10.11.200.24:62680 <-- 10.0.16.51:2855
>
> MSRP 5f0c96c84796750d SEND
>
> To-Path: msrp://10.11.52.53:2855/b5e6018fca0bdddfcea2;tcp
>
> From-Path: msrp://10.0.16.51:2855/s.12455.7.1628740562;tcp
> msrp://10.0.0.5:62680/7549e765f173b8ae2250;tcp
>
> Message-ID: d54ab6cddfffb429
>
> Byte-Range: 1-375/375
>
> Success-Report: no
>
> Failure-Report: partial
>
> Content-Type: message/cpim
>
>  
>
> From: pvenkatayogi <sip:pvenkatayogi at labsip00.cyracom.com>
>
> To: <sip:pranathi at labsip00.cyracom.com>
>
> DateTime: 2016-11-08T15:47:17.336892-06:00
>
>  
>
> MIME-Version: 1.0
>
> Content-Type: application/im-iscomposing+xml
>
>  
>
> <?xml version='1.0' encoding='UTF-8'?>
>
> <isComposing
> xmlns="urn:ietf:params:xml:ns:im-iscomposing"><state>active</state><contenttype>text</contenttype></isComposing>
>
>  
>
> -------5f0c96c84796750d$
>
> *Message4 is source machine rightly rejecting the Message3 above
> saying it is not for me.*
>
> *Message4: * 2016-11-08 15:47:17.429911 [blink.exe 26372]:
> 10.11.200.24:62680 --> 10.0.16.51:2855
>
> *MSRP 5f0c96c84796750d 481 Invalid To-Path*
>
>  
>
> To-Path: msrp://10.0.16.51:2855/s.12455.7.1628740562;tcp
>
> From-Path: msrp://10.11.52.53:2855/b5e6018fca0bdddfcea2;tcp
>
>  
>
> -------5f0c96c84796750d$
>
> -----------------------------------------------------------------------------------------------
>
> *Pranathi Venkatayogi*
>
> /System Developer II/
>
> (520) 745-9447 x4466
>
> www.cyracom.com <http://www.cyracom.com/>
>
>  
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-- 
Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio Advanced Training, Berlin, Nov 28-30, 2016 - http://www.asipto.com

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