<div dir="ltr">Hello,<div><br></div><div>No, that's not the case, see below the INVITE sent to the branch:</div><div><br></div><div>INVITE sip:123456789@1.2.3.4:5060;transport=UDP SIP/2.0<br>Record-Route: <sip:1.2.3.4:5060;lr;ftag=244c2803;did=cb4.8cb><br>Via: SIP/2.0/UDP 1.2.3.4:5060;branch=z9hG4bK0f41.5079ae8da835958ee58ca1e8a4eb057b.0<br>Via: SIP/2.0/UDP 192.168.1.10:40769;received=1.3.5.7;branch=z9hG4bK-524287-1---46a5782b47b6ec85;rport=40769<br>Max-Forwards: 69<br>Contact: <sip:101@1.3.5.7:40769;transport=UDP;alias=1.3.5.7~40769~1><br>To: <<a href="http://sip:123456789@1.2.3.4:5060">sip:123456789@1.2.3.4:5060</a>><br>From: <sip:101@1.2.3.4:5060;transport=UDP>;tag=244c2803<br>Call-ID: KfuC1GMvCvk1YCSKnHwDrw..<br>CSeq: 2 INVITE<br>Allow: INVITE, ACK, CANCEL, BYE, NOTIFY, REFER, MESSAGE, OPTIONS, INFO, SUBSCRIBE<br>Content-Type: application/sdp<br>User-Agent: Z 5.4.12 v2.10.13.2-mod<br>Allow-Events: presence, kpml, talk<br>Content-Length: 336<br>TOH: 123456789<br><br>v=0<br>o=Z 1620220570589 1 IN IP4 1.3.5.7<br>s=Z<br>c=IN IP4 1.3.5.7<br>t=0 0<br>m=audio 8000 RTP/AVP 106 9 98 101 0 8 3<br>a=rtpmap:106 opus/48000/2<br>a=fmtp:106 sprop-maxcapturerate=16000; minptime=20; useinbandfec=1<br>a=rtpmap:98 telephone-event/48000<br>a=fmtp:98 0-16<br>a=rtpmap:101 telephone-event/8000<br>a=fmtp:101 0-16<br>a=sendrecv<br></div><div><br></div><div>thanks</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, 5 May 2021 at 16:24, Daniel-Constantin Mierla <<a href="mailto:miconda@gmail.com">miconda@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hello,</p>
<p>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.<br>
</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div>On 05.05.21 16:25, Ilie Soltanici
wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hello,<br>
<div><br>
</div>
<div>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:</div>
<div><br>
</div>
<div>DEBUG: tm [t_msgbuilder.c:391]: build_local_reparse():
duplicate To header</div>
<div>ERROR: tm [t_msgbuilder.c:531]: build_local_reparse():
cannot build CANCEL request<br>
ERROR: tm [t_cancel.c:297]: cancel_branch(): attempt to build
a CANCEL failed<br>
ERROR: tm [t_fwd.c:1434]: e2e_cancel(): cancel error<br>
</div>
<div><br>
</div>
<div>And this is the sip message:</div>
<div><br>
</div>
<div>CANCEL <a href="http://sip:123456789@1.2.3.4:5060" target="_blank">sip:123456789@1.2.3.4:5060</a>
SIP/2.0<br>
Via: SIP/2.0/UDP
192.168.1.1:19373;branch=z9hG4bK-524287-1---7774073fad1a3264;rport<br>
Max-Forwards: 70<br>
To: <<a href="http://sip:123456789@1.2.3.4:5060" target="_blank">sip:123456789@1.2.3.4:5060</a>><br>
From: "101"<<a href="http://sip:101@1.2.3.4:5060" target="_blank">sip:101@1.2.3.4:5060</a>>;tag=6f373b66<br>
Call-ID: hC2O6zx8ZaUJ1di046<br>
CSeq: 2 CANCEL<br>
Proxy-Authorization: Digest
username="101",realm="1.2.3.4",nonce="YJKbfWCSmlFTHxdJfKmySydF9L7FzfaqcgyOo4A=",uri="<a href="http://sip:123456789@1.2.3.4:5060" target="_blank">sip:123456789@1.2.3.4:5060</a>",response="2bf2ba8ef2374d6aa8c39d650613077d",algorithm=MD5<br>
User-Agent: TEST<br>
Content-Length: 0<br>
</div>
<div><br>
</div>
<div>version: kamailio 5.5.0 (x86_64/linux) d4c1a1</div>
<div><br>
</div>
<div>The route itself, is like in the standard documentation:</div>
<div><br>
</div>
<div># CANCEL processing<br>
if KSR.is_CANCEL() :<br>
KSR.info(RANDOM_LOG + 'KSR.is_CANCEL')<br>
if KSR.tm.t_check_trans()>0 :<br>
self.ksr_route_relay(msg)<br>
return 1<br>
</div>
<div><br>
</div>
<div><br>
</div>
<div> def ksr_route_relay(self, msg):<br>
if KSR.is_method_in("IBSU") :<br>
if KSR.tm.t_is_set("branch_route")<0 :<br>
KSR.tm.t_on_branch("ksr_branch_manage")<br>
<br>
if KSR.is_method_in("ISU") :<br>
if KSR.tm.t_is_set("onreply_route")<0 :<br>
KSR.tm.t_on_reply("ksr_onreply_manage")<br>
<br>
if KSR.is_INVITE() :<br>
if KSR.tm.t_is_set("failure_route")<0 :<br>
KSR.tm.t_on_failure("ksr_failure_manage")<br>
<br>
if KSR.tm.t_relay()<0 :<br>
KSR.sl.sl_reply_error()<br>
<br>
return -255<br>
</div>
<div><br>
</div>
<div>Thanks</div>
</div>
<br>
<fieldset></fieldset>
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</blockquote>
<pre cols="72">--
Daniel-Constantin Mierla -- <a href="http://www.asipto.com" target="_blank">www.asipto.com</a>
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