[SR-Users] Unable to parse the Cancel request
Daniel-Constantin Mierla
miconda at gmail.com
Wed May 5 17:42:02 CEST 2021
Hello,
are you running the latest version in the X.Y series? Likely you have a
version with an issue that was fixed, iirc.
Cheers,
Daniel
On 05.05.21 17:32, Ilie Soltanici wrote:
> Hello,
>
> No, that's not the case, see below the INVITE sent to the branch:
>
> INVITE sip:123456789 at 1.2.3.4:5060;transport=UDP SIP/2.0
> Record-Route: <sip:1.2.3.4:5060;lr;ftag=244c2803;did=cb4.8cb>
> Via: SIP/2.0/UDP
> 1.2.3.4:5060;branch=z9hG4bK0f41.5079ae8da835958ee58ca1e8a4eb057b.0
> Via: SIP/2.0/UDP
> 192.168.1.10:40769;received=1.3.5.7;branch=z9hG4bK-524287-1---46a5782b47b6ec85;rport=40769
> Max-Forwards: 69
> Contact: <sip:101 at 1.3.5.7:40769;transport=UDP;alias=1.3.5.7~40769~1>
> To: <sip:123456789 at 1.2.3.4:5060 <http://sip:123456789@1.2.3.4:5060>>
> From: <sip:101 at 1.2.3.4:5060;transport=UDP>;tag=244c2803
> Call-ID: KfuC1GMvCvk1YCSKnHwDrw..
> CSeq: 2 INVITE
> Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS,
> INFO, SUBSCRIBE
> Content-Type: application/sdp
> User-Agent: Z 5.4.12 v2.10.13.2-mod
> Allow-Events: presence, kpml, talk
> Content-Length: 336
> TOH: 123456789
>
> v=0
> o=Z 1620220570589 1 IN IP4 1.3.5.7
> s=Z
> c=IN IP4 1.3.5.7
> t=0 0
> m=audio 8000 RTP/AVP 106 9 98 101 0 8 3
> a=rtpmap:106 opus/48000/2
> a=fmtp:106 sprop-maxcapturerate=16000; minptime=20; useinbandfec=1
> a=rtpmap:98 telephone-event/48000
> a=fmtp:98 0-16
> a=rtpmap:101 telephone-event/8000
> a=fmtp:101 0-16
> a=sendrecv
>
> thanks
>
> On Wed, 5 May 2021 at 16:24, Daniel-Constantin Mierla
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
> Hello,
>
> the CANCEL to be sent is generated locally by tm module from the
> INVITE that was sent on the branch, so the errors is actually
> about a duplicate To header in that INVITE. Check it on the
> network to see if that's the case.
>
> Cheers,
> Daniel
>
> On 05.05.21 16:25, Ilie Soltanici wrote:
>> Hello,
>>
>> We are having an issue here where Kamailio is complaining about
>> duplicate To header, while in the SIP Packet there is just one.
>> See below the log message:
>>
>> DEBUG: tm [t_msgbuilder.c:391]: build_local_reparse(): duplicate
>> To header
>> ERROR: tm [t_msgbuilder.c:531]: build_local_reparse(): cannot
>> build CANCEL request
>> ERROR: tm [t_cancel.c:297]: cancel_branch(): attempt to build a
>> CANCEL failed
>> ERROR: tm [t_fwd.c:1434]: e2e_cancel(): cancel error
>>
>> And this is the sip message:
>>
>> CANCEL sip:123456789 at 1.2.3.4:5060
>> <http://sip:123456789@1.2.3.4:5060> SIP/2.0
>> Via: SIP/2.0/UDP
>> 192.168.1.1:19373;branch=z9hG4bK-524287-1---7774073fad1a3264;rport
>> Max-Forwards: 70
>> To: <sip:123456789 at 1.2.3.4:5060 <http://sip:123456789@1.2.3.4:5060>>
>> From: "101"<sip:101 at 1.2.3.4:5060
>> <http://sip:101@1.2.3.4:5060>>;tag=6f373b66
>> Call-ID: hC2O6zx8ZaUJ1di046
>> CSeq: 2 CANCEL
>> Proxy-Authorization: Digest
>> username="101",realm="1.2.3.4",nonce="YJKbfWCSmlFTHxdJfKmySydF9L7FzfaqcgyOo4A=",uri="sip:123456789 at 1.2.3.4:5060
>> <http://sip:123456789@1.2.3.4:5060>",response="2bf2ba8ef2374d6aa8c39d650613077d",algorithm=MD5
>> User-Agent: TEST
>> Content-Length: 0
>>
>> version: kamailio 5.5.0 (x86_64/linux) d4c1a1
>>
>> The route itself, is like in the standard documentation:
>>
>> # CANCEL processing
>> if KSR.is_CANCEL() :
>> KSR.info(RANDOM_LOG + 'KSR.is_CANCEL')
>> if KSR.tm.t_check_trans()>0 :
>> self.ksr_route_relay(msg)
>> return 1
>>
>>
>> def ksr_route_relay(self, msg):
>> if KSR.is_method_in("IBSU") :
>> if KSR.tm.t_is_set("branch_route")<0 :
>> KSR.tm.t_on_branch("ksr_branch_manage")
>>
>> if KSR.is_method_in("ISU") :
>> if KSR.tm.t_is_set("onreply_route")<0 :
>> KSR.tm.t_on_reply("ksr_onreply_manage")
>>
>> if KSR.is_INVITE() :
>> if KSR.tm.t_is_set("failure_route")<0 :
>> KSR.tm.t_on_failure("ksr_failure_manage")
>>
>> if KSR.tm.t_relay()<0 :
>> KSR.sl.sl_reply_error()
>>
>> return -255
>>
>> Thanks
>>
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>
> --
> Daniel-Constantin Mierla -- www.asipto.com <http://www.asipto.com>
> www.twitter.com/miconda <http://www.twitter.com/miconda> -- www.linkedin.com/in/miconda <http://www.linkedin.com/in/miconda>
> Kamailio Advanced Training - Online
> May 17-20, 2021 (Europe Timezone) - June 7-10, 2021 (America Timezone)
> * https://www.asipto.com/sw/kamailio-advanced-training-online/ <https://www.asipto.com/sw/kamailio-advanced-training-online/>
>
--
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda
Kamailio Advanced Training - Online
May 17-20, 2021 (Europe Timezone) - June 7-10, 2021 (America Timezone)
* https://www.asipto.com/sw/kamailio-advanced-training-online/
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