[OpenSIPS-Users] Manipulate Opensips generated SIP headers

[Bogdan-Andrei Iancu]

Hi Ping,

You should not manually change the cseq in the messages as you will 
break the whole dialog (the sequential requests).

The 2.1 version does cseq increasing (with dialog consistency) when 
performing uac_auth().

Regards,

Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

On 05.06.2015 09:39, Ping Han wrote:
> Hi Bogdan,
>
> Thanks for your reply.
>
> I am trying to manipulate the CSeq header.
>
> I have attached a packet trace.
>
> In the example 10.216.235.38 sends a SIP Invite to 10.216.235.37 via 
> Opensips. Then 10.216.235.37 challenges authentication. In the second 
> SIP Invite that contains the authentication info (frame number 6), I 
> have to increment the CSeq header otherwise 10.216.235.37 does not 
> like it. The new CSeq is now set to 2.
>
> If 10.216.235.37 is not able to accept the call, it returns something 
> other than "200 OK" (606 in this example). Now it is the problem. 
> Opensips sends back an ACK (frame number 12) with CSeq set to 1 (not 
> 2). 10.216.235.37 is expecting an ACK with a CSeq set to 2. The 
> consequence is that 10.216.235.37 keeps sending 606 until times out.
>
> The ACK is internally generated by Opensips and as you said we can not 
> manipulate it. I am wondering if there is any way to solve this problem.
>
> PS: 10.216.235.97 is the internal IP of Opensips server and 
> 10.216.235.74 is the external IP.
>
> Thanks,
> Ping
>
>
> On Thu, Jun 4, 2015 at 12:55 AM, Bogdan-Andrei Iancu 
> <bogdan at opensips.org <mailto:bogdan at opensips.org>> wrote:
>
>     Hi Ping,
>
>     There is no access to internally generated ACK and CANCEL requests.
>
>     What are you trying to do ?
>
>     Regards,
>
>     Bogdan-Andrei Iancu
>     OpenSIPS Founder and Developer
>     http://www.opensips-solutions.com
>
>     On 03.06.2015 02:53, Ping Han wrote:
>>     Hi,
>>
>>     With Opensips is there a way to manipulate the SIP headers of a
>>     messages that are generated locally by Opensips. See the example
>>     below.
>>
>>     --------------------------------------------
>>     ACK sip:0370103204 at 192.168.100.37:5060
>>     <http://sip:0370103204@192.168.100.37:5060> SIP/2.0
>>     Via: SIP/2.0/UDP 192.168.100.74:5060;branch=z9hG4bK5094.3ee05403.1
>>     From:<sip:0370103401 at xxxvoip.com
>>     <mailto:sip%3A0370103401 at xxxvoip.com>>;tag=1740643510
>>     Call-ID: 641613075 at 192.168.100.38 <mailto:641613075 at 192.168.100.38>
>>     To:<sip:0370103204 at 192.168.100.37:5060
>>     <http://sip:0370103204@192.168.100.37:5060>>;tag=1994410995-1432625097305;
>>     CSeq: 1 ACK
>>     Max-Forwards: 70
>>     User-Agent: OpenSIPS (2.1.0 (x86_64/linux))
>>     Content-Length: 0
>>     --------------------------------------------
>>
>>     Thanks,
>>     Ping Han
>>
>>
>>     _______________________________________________
>>     Users mailing list
>>     Users at lists.opensips.org  <mailto:Users at lists.opensips.org>
>>     http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.opensips.org/pipermail/users/attachments/20150609/e9ba714c/attachment-0001.htm>