[SR-Users] Unable to parse the Cancel request

Ilie Soltanici iliusha.md at gmail.com
Wed May 5 17:56:35 CEST 2021


Hello,

Yes, initially I was trying with version 5.4.5, then I upgraded to the
latest version from 5.5 branch - but this didn't fix the issue.

version: kamailio 5.5.0 (x86_64/linux) d4c1a1
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE,
USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC,
TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT,
USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST,
HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024,
BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: d4c1a1
compiled on 16:08:42 May  5 2021 with gcc 8.3.0

OS: Description: Debian GNU/Linux 10 (buster)

Thank you.

On Wed, 5 May 2021 at 16:42, Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> 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>
> 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>
> 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 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>
>> From: "101"<sip:101 at 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
>> ",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.comwww.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/
>>
>> --
> Daniel-Constantin Mierla -- www.asipto.comwww.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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