[OpenSIPS-Users] CANCEL packet modification.

[Bogdan-Andrei Iancu]

I see....We have a patch to allow changing cseq, we are working in 
properly integrating it in the public tree. Hopefully it will be ready 
in the next 1-2 weeks.

Regards,

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

On 06.08.2014 19:45, Igor Olhovskiy wrote:
> Change CSeq
> It's related to problem to get registering proxy. Means on one side is 
> "transparent" dialog, on other - need to be auth'ed. While auth 
> (INVITE - 401 - INVITE (with digest + another CSeq)) you have to 
> change CSeq.
>
> 06.08.14 19:41, Bogdan-Andrei Iancu написав(ла):
>> Hi Igor,
>>
>> The CANCEL requests are propagating hop by hop (and not end-to-end) - 
>> this means the request is re-generated by each hop. This is why you 
>> cannot change it.
>>
>> What exactly are you trying to achieve here ?
>>
>> Regards,
>> Bogdan-Andrei Iancu
>> OpenSIPS Founder and Developer
>> http://www.opensips-solutions.com
>> On 04.08.2014 15:40, Igor Olhovskiy wrote:
>>> Hi!
>>>
>>> I've tried some modification of in-transaction CANCEL packets.
>>> Idea A call B, than A cancels call.
>>> Initial CANCEL:
>>>
>>> *CANCEL* sip:0919082171 at XXXXXXX SIP/2.0
>>> Via: SIP/2.0/UDP 31.172.143.70;rport;branch=*z9hG4bKHg59atZ9pDDHg*
>>> Route: <sip:31.172.143.67:5060>
>>> Max-Forwards: 68
>>> From: "2063259" <sip:2063259 at 31.172.143.70>;tag=*N1D0tceygg3tN*
>>> To: <sip:0919082171 at XXXXXXXX>
>>> Call-ID: *ed5d0207-9675-1232-e38f-000c29eaa3c3*
>>> CSeq: 63241643 *CANCEL*
>>> Reason: SIP;cause=487;text="ORIGINATOR_*CANCEL*"
>>> Content-Length: 0
>>>
>>> I've simply add
>>>
>>> if (is_method("CANCEL")) {
>>> ...
>>>     xlog("L_INFO", "CANCEL!");
>>>     append_hf("X-Hint: CANCEL!\r\n");
>>>     if (t_check_trans()) {
>>>         xlog("L_INFO", "CANCEL is in transaction!");
>>>         t_relay();
>>>     }
>>> }
>>>
>>> In logs I see:
>>>
>>> CANCEL!
>>> CANCEL is in transaction!
>>>
>>> but I can't see appended header to outgoing CANCEL packet.
>>>
>>> Outgoing CANCEL is
>>>
>>>
>>> *CANCEL* sip:0919082171 at XXXXXXX SIP/2.0
>>> Via: SIP/2.0/UDP 31.172.143.67:5060;branch=*z9hG4bKed78.b56ef11.1*
>>> From: "2063259" <sip:2063259 at 31.172.143.70>;tag=*N1D0tceygg3tN*
>>> Call-ID: *ed5d0207-9675-1232-e38f-000c29eaa3c3*
>>> To: <sip:0919082171 at XXXXXXX>
>>> CSeq: 63241643 *CANCEL*
>>> Max-Forwards: 70
>>> Reason: SIP;cause=487;text="ORIGINATOR_*CANCEL*"
>>> User-Agent: OpenSIPS (1.11.2-notls (x86_64/linux))
>>> Content-Length: 0
>>>
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
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>>
>

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