[SR-Users] TCP connection select problem

[张顺通]

sorry，I have not expressed clearly.

kamailio will recive two REGISTER at a time.In first 200 OK to REGISTER,
Server will tell Linphone the Linphone Nat Ip and Port.
like this:
Via:SIP/2.0/TCP 30.9.2.1:50691
;received=42.1.7.1;alias;branch=z9hG4bK.kmhC2L9Rf;rport=33746
and Linphone will know it's outside nat Ip and port, Linphone while use
this Ip and Port in second REGISTER.
like this:
REGSITER
Contact:<sip: 42.1.7.1:33746;transport=tcp>

So kamailio server know Linphone's nated ip and port and save in DB(contact
field).


my question is KA_EDGE receive sip from KA_REGISTER already have right nat
ip and port like
INVITE 123456 at 42.1.7.1:33746;transport=tcp  SIP/2.0
but KA_EDGE do not send this sip msg to 42.1.7.1:33746, it send to another
nat ip and port(other Linphone's ip and port behind same NAT layer)


2016-03-14 21:42 GMT+08:00 Daniel-Constantin Mierla <miconda at gmail.com>:

> 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>
> 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;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>
>> 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;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).
>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>> sr-users at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>
>>
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>> --
>> Daniel-Constantin Mierlahttp://www.asipto.comhttp://twitter.com/#!/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
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>
> --
> Daniel-Constantin Mierlahttp://www.asipto.comhttp://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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