[SR-Users] TCP connection select problem

[Daniel-Constantin Mierla]

Indeed, the ports are different, that's why adding received is important
in this situation.

While local ip and local port are in most of the cases also unique for
devices behind a nat router, it is not 100% true, because there can be
many layers of NATs, which can result in seeing same local ip/port for
devices.

Cheers,
Daniel

On 14/03/16 13:06, 张顺通 wrote:
> source IP  is same,  But port is different。
> like INVITE sip:Linphone_nat_Ip:Linphone_nat_port;tcp;
>
>
> 2016-03-14 18:26 GMT+08:00 Daniel-Constantin Mierla <miconda at gmail.com
> <mailto:miconda at gmail.com>>:
>
>     Adding received information to Path helps to identify properly the
>     connection to be used. Because both devices are behind the same
>     NAT, practically they show the same source IP when they send
>     traffic to server.
>
>     Cheers,
>     Daniel
>
>
>     On 14/03/16 04:05, 张顺通 wrote:
>>     KA_EDGE have two IP，external public IP and internal IP.
>>     I add modparam("path", "use_received", 1)  and replace add_path()
>>     to add_path_received() in edge server.
>>     add modparam("registrar", "path_use_received", 1) in KA_REGISTER
>>     server.
>>
>>     DB path info <sip:aD15fXXXXXXXXXXXXeEpfqRY=@10.10.10.11
>>     <http://10.10.10.11>;lr;ob>
>>     --> <sip:10.10.10.11;lr;received=sip:42.129.1.1:43640%3Btransport%3Dtcp>
>>
>>     This kind of situation very little，It is not easy to reappear.
>>     Can you tell me why this situation happen? and Why this change
>>     can solve the problem?
>>
>>     Thanks for Your Time.
>>
>>
>>
>>     2016-03-09 22:37 GMT+08:00 Daniel Tryba <d.tryba at pocos.nl
>>     <mailto:d.tryba at pocos.nl>>:
>>
>>         On Wed, Mar 09, 2016 at 10:05:11PM +0800, 张顺通 wrote:
>>         > Yes，Use Path in DB. like
>>         <sip:XXxXXXXXXXXXX/ogxZg=@10.10.232.29
>>         <http://10.10.232.29>;lr;ob>
>>         > KA_REGISTER wile the path info in DB.
>>
>>         Should not be a problem if you use the use_received options in
>>         http://kamailio.org/docs/modules/stable/modules/path.html#idp135216
>>         and
>>         http://kamailio.org/docs/modules/stable/modules/registrar.html#registrar.p.path_use_received
>>
>>         (and actually add the source as received on the kamailio edge
>>         server).
>>
>>         _______________________________________________
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>>
>>
>>
>>
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>
>     -- 
>     Daniel-Constantin Mierla
>     http://www.asipto.com
>     http://twitter.com/#!/miconda <http://twitter.com/#%21/miconda> - http://www.linkedin.com/in/miconda
>     Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com
>
>
>     _______________________________________________
>     SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>     list
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>
>

-- 
Daniel-Constantin Mierla
http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Kamailio World Conference, Berlin, May 18-20, 2016 - http://www.kamailioworld.com

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