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<p>Hello,</p>
<p>that can happen when you do many operations over the contact
header (e.g., functions like fix_natted_contact()), see more
details for a similar case at:</p>
<p> *
<a class="moz-txt-link-freetext" href="https://www.kamailio.org/wiki/tutorials/faq/main#why_parts_of_fromto_header_app">https://www.kamailio.org/wiki/tutorials/faq/main#why_parts_of_fromto_header_app</a></p>
<p>If you need many operations, then you have to use
msg_apply_changes() in between.</p>
<p>Cheers,<br>
Daniel<br>
</p>
<div class="moz-cite-prefix">On 06.01.21 17:05, Devang Dhandhalya
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAP0uOe8oz=pja4ggUJmqyOSf--1xcpsQ3AnZsME1v7C+SrHTuA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">in my requirement call coming from sbc to kamailio
proxy and we route to pbx server in that when
<div>kamailio proxy get the call at that time i am removing
Contact header using remove_hf("Contact") and adding contact
Header using append_hf("$uac_req(hdrs)") for route to PBX
server . in that signaling i am getting modified Contact
header but old contact header not removed properly some junks
are remain in the signaling </div>
<div><br>
</div>
<div>scenario : </div>
<div><br>
</div>
<div>SBC ---------> Kamailio proxy ------> PBX</div>
<div><br>
</div>
<div>before using remove_hf("Contact") </div>
<div><br>
</div>
<div>INVITE <a href="mailto:sip%3A5678@opensips.org"
target="_blank" moz-do-not-send="true">sip:user2@</a><a
href="http://domain.org" moz-do-not-send="true">domain.org</a>;transport=UDP
SIP/2.0<br>
Via: SIP/2.0/UDP
10.212.xxx.xxx:port;branch=z9hG4bK-524287-1---8c5ac8642f321a9e<br>
Max-Forwards: 70<br>
Contact: <a class="moz-txt-link-rfc2396E" href="sip:user1@10.212.xxx.xxx:39931;transport=UDP"><sip:user1@10.212.xxx.xxx:39931;transport=UDP></a><br>
To: <<a href="mailto:sip%3A5678@opensips.org"
target="_blank" moz-do-not-send="true">sip:user2@</a><a
href="http://domain.org" moz-do-not-send="true">domain.org</a>;transport=UDP><br>
From: <<a href="mailto:sip%3A1234@opensips.org"
target="_blank" moz-do-not-send="true">sip:user1@</a><a
href="http://domain.org" moz-do-not-send="true">domain.org</a>;transport=UDP>;tag=891fd646<br>
Call-ID: t9Ff-fCrin_VN1IO9Xf1mA..<br>
CSeq: 2 INVITE<br>
Content-Type: application/sdp<br>
Proxy-Authorization: Digest username="user1",realm="domain<a
href="http://opensips.org" target="_blank"
moz-do-not-send="true">.org</a>",nonce="5ff5a660afc72502212b4a611bb0d689efadafab",uri="<a
href="mailto:sip%3A5678@opensips.org" target="_blank"
moz-do-not-send="true">sip:user2@domain.org</a>;transport=UDP",response="f926e3742cbdcb8c68ea9b5<br>
82ac2dc",cnonce="9b3276d6d37aaa6107a835df8e5b3a87",nc=00000001,qop=auth,algorithm=MD5<br>
User-Agent: Z 3.15.40006 rv2.8.20<br>
Allow-Events: presence, kpml, talk<br>
Content-Length: 243<br>
<br>
v=0<br>
o=Z 0 0 IN IP4 10.212.xxx.xxx<br>
s=Z<br>
c=IN IP4 10.212.xxx.xxx<br>
t=0 0<br>
m=audio 8000 RTP/AVP 3 110 8 0 97 101<br>
a=rtpmap:110 speex/8000<br>
a=rtpmap:97 iLBC/8000<br>
a=fmtp:97 mode=30<br>
a=rtpmap:101 telephone-event/8000<br>
a=fmtp:101 0-16<br>
a=sendrecv<br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>after using remove-hf("Contact") function removing contact
header but some junks are left and that eats next To header
line and breaks Invite packet </div>
<div><br>
</div>
<div><span
id="m_6086192861765755615gmail-docs-internal-guid-08b58fff-7fff-3787-298f-839fdb972470">
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt">INVITE
<a class="moz-txt-link-freetext" href="sip:user2@domain.org:;transport=UDP">sip:user2@domain.org:;transport=UDP</a> SIP/2.0<br>
Record-Route:
<a class="moz-txt-link-rfc2396E" href="sip:172.xx.xx.xxx;lr=on;ftag=891fd646;vst=AAAAAFFTQVkuCENVXUEpHwNLAQEOSwdcDhwUcG9ydD1VRFA-;vsf=AAAAAFVCQ1U0ChwlAQMMHgBHHwFJVAYVYW5zcG9ydD1VRFA-"><sip:172.xx.xx.xxx;lr=on;ftag=891fd646;vst=AAAAAFFTQVkuCENVXUEpHwNLAQEOSwdcDhwUcG9ydD1VRFA-;vsf=AAAAAFVCQ1U0ChwlAQMMHgBHHwFJVAYVYW5zcG9ydD1VRFA-></a><br>
Via: SIP/2.0/UDP
172.xx.xx.xxx;branch=z9hG4bKbe4c.9743b885ad3452287530994a2cad6e50.0<br>
Via: SIP/2.0/UDP
10.212.xxx.xxx:39931;rport=39931;received=172.xx.xx.x;branch=z9hG4bK-524287-1---8c5ac8642f321a9e<br>
Max-Forwards: 69<br>
<a class="moz-txt-link-freetext" href="sip:user1@172.xx.xx.x:39931;transport=UDPTo">sip:user1@172.xx.xx.x:39931;transport=UDPTo</a>: <<a
href="mailto:sip%3Adevang3032@opensips.org"
target="_blank" moz-do-not-send="true">sip:user2@domain.org</a>><br>
From: <<a href="mailto:sip%3Adppatel@opensips.org"
target="_blank" moz-do-not-send="true">sip:user1@domain.org</a>>;tag=891fd646<br>
Call-ID: t9Ff-fCrin_VN1IO9Xf1mA..<br>
CSeq: 2 INVITE<br>
Content-Type: application/sdp<br>
User-Agent: Z 3.15.40006 rv2.8.20<br>
Allow-Events: presence, kpml, talk<br>
Content-Length: 534<br>
Contact: <<a
href="http://sip:dppatel@172.16.16.163:5060"
target="_blank" moz-do-not-send="true">sip:user2@172.xx.xx.xxx:5060</a>><br>
<br>
v=0<br>
o=Z 0 0 IN IP4 10.212.xxx.xxx<br>
s=Z<br>
c=IN IP4 172.xx.xx.xxx<br>
t=0 0<br>
m=audio 11210 RTP/AVP 3 110 8 0 97 101<br>
a=rtpmap:3 GSM/8000<br>
a=rtpmap:110 speex/8000<br>
a=rtpmap:8 PCMA/8000<br>
a=rtpmap:0 PCMU/8000<br>
a=rtpmap:97 iLBC/8000<br>
a=rtpmap:101 telephone-event/8000<br>
a=fmtp:97 mode=30<br>
a=fmtp:101 0-16<br>
a=sendrecv<br>
a=rtcp:11211<br>
a=ice-ufrag:lzjregPe<br>
a=ice-pwd:RtA9x3jUWk4yNpJlzPL60nsRck<br>
a=candidate:LhtmUSbPt9BJs4ZC 1 UDP 2130706431
172.16.16.163 11210 typ host<br>
a=candidate:LhtmUSbPt9BJs4ZC 2 UDP 2130706430
172.16.16.163 11211 typ host<br>
</p>
<p dir="ltr"
style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br>
</p>
<p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt">As
you can see Contact header is gone but
<a class="moz-txt-link-freetext" href="sip:1234@172.xx.xx.x:39931;transport=UDP">sip:1234@172.xx.xx.x:39931;transport=UDP</a> part left before
To header . and its breake invite packet .</p>
<p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br>
</p>
<p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><span style="color:rgb(0,0,0);white-space:pre-wrap">Any suggestion will be highly appreciated.</span></p>
<p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br>
</p>
<p style="line-height:1.38;margin-top:0pt;margin-bottom:0pt"><br>
</p>
</span></div>
</div>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla -- <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda">www.linkedin.com/in/miconda</a>
Funding: <a class="moz-txt-link-freetext" href="https://www.paypal.me/dcmierla">https://www.paypal.me/dcmierla</a></pre>
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