[SR-Users] Reply:Re: TCP connection select problem

Tue Mar 22 14:58:48 CET 2016

建议使用GRUU，可以回避同一个点登录，多个location 地址。

At 2016-03-21 18:34:41, "张顺通" <shuntongzhang at gmail.com> wrote:

Have provided Callid, thanks.

register callid
2bbadd72-d733-434e-bd06-45d9ddb5289b
a7fa5d8f-1e46-4605-9a6e-08751bc75fee

call
626fec11-684b-1234-d0b9-ecf4bbde9ef8

2016-03-21 16:45 GMT+08:00 Daniel-Constantin Mierla <miconda at gmail.com>:

Quickly looked at the file and I see several calls there. All of them are exposing the issue? Or can you give the call-id of the call that didn't work fine? I don't want to lose time looking at all the calls, knowing one that is wrong is enough...

Cheers,
Daniel

On 21/03/16 03:50, 张顺通 wrote:

I Send you pcap Separatly.

Sorry, can't send pcap to mail list.

Thanks

2016-03-15 16:08 GMT+08:00 Daniel-Constantin Mierla <miconda at gmail.com>:

Can you attach a pcap with such situation, which includes the REGISTER, replies and the call showing the issue?

Cheers,
Daniel

On 15/03/16 03:36, 张顺通 wrote:

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>:

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>:
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).

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

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

-- 
Daniel-Constantin Mierla
http://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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