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Hello,<br>
<br>
the caller side builds the ack inccorectly.<br>
<br>
The Contact in 200ok for INVITE is:<br>
<br>
Contact: <a class="moz-txt-link-rfc2396E" href="sip:10004@10.10.11.232:5060"><sip:10004@10.10.11.232:5060></a>.<br>
<br>
But the ACK coming to the server has:<br>
<br>
ACK <a class="moz-txt-link-freetext" href="sip:10004@44.44.44.148:5060">sip:10004@44.44.44.148:5060</a> SIP/2.0.<br>
<br>
I see that there is proxy between the caller and the server, it
could be the one doing some wrong mangling of Contact in 200ok.<br>
<br>
Do you control the sip proxy that adds the header:<br>
<br>
Record-Route: <a class="moz-txt-link-rfc2396E" href="sip:194.213.29.92;lr=on;ftag=as62247c45"><sip:194.213.29.92;lr=on;ftag=as62247c45></a>.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 29/09/15 15:42, Miroslav Dunaev
wrote:<br>
</div>
<blockquote
cite="mid:CADOrUk5mL1GWCtnC4s71_A_u9UsD_Z6DDOxmcOzDYXrqo1Q2ag@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">Hello
everyone,</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">I have a
setup where kamailio acts as UAC to a SIP provider.</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">Kamailio is
also configured to pass all incoming calls to an Asterisk.</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">Here is a
diagram:</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)"><br>
</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">Phone<-->Asterisk(10.10.11.232)<--->(PRIV:10.10.11.238)Kamailio(PUB:44.44.44.148)<--->(194.213.29.92)SIP-provider.</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)"><br>
</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">When a call
comes in from the SIP-provider, it gets all the way to the
phone.</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">But when the
SIP-provider sends BYE or ACK (during hungup event or
200OK/SDP asterisk response.).</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">I get this
errors in my kamailio log:<br>
</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">
<div class="gmail_default"><br>
</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">
<div class="gmail_default"> siputils [checks.c:100]:
has_totag(): totag found</div>
<div class="gmail_default"><core>
[parser/parse_rr.c:49]: do_parse_rr_body():
parse_rr_body(): No body for record-route</div>
<div class="gmail_default">rr [loose.c:106]:
find_first_route(): failed to parse Route HF</div>
<div class="gmail_default">rr [loose.c:929]: loose_route():
There is no Route HF</div>
<div class="gmail_default">tm [t_lookup.c:648]:
t_lookup_request(): DEBUG: t_lookup_request: no
transaction found</div>
<div class="gmail_default">tm [t_lookup.c:1011]:
t_check_msg(): DEBUG: t_check_msg: msg id=1 global id=0 T
start=0xffffffffffffffff</div>
<div class="gmail_default">tm [t_lookup.c:466]:
t_lookup_request(): t_lookup_request: start searching:
hash=10101, isACK=1</div>
<div class="gmail_default">tm [t_lookup.c:424]:
matching_3261(): DEBUG: RFC3261 transaction matching
failed</div>
</div>
</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">.....</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">....</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">....</div>
<div class="gmail_default" style="font-family:'times new
roman',serif;font-size:large;color:rgb(68,68,68)">
<div class="gmail_default">siputils [checks.c:100]:
has_totag(): totag found</div>
<div class="gmail_default">tm [t_lookup.c:1312]: t_newtran():
DEBUG: t_newtran: msg id=2 , global msg id=1 , T on
entrance=0xffffffffffffffff</div>
<div class="gmail_default">tm [t_lookup.c:466]:
t_lookup_request(): t_lookup_request: start searching:
hash=10101, isACK=1</div>
<div class="gmail_default">tm [t_lookup.c:424]:
matching_3261(): DEBUG: RFC3261 transaction matching failed</div>
<div class="gmail_default">tm [t_lookup.c:648]:
t_lookup_request(): DEBUG: t_lookup_request: no transaction
found</div>
<div class="gmail_default">tm [t_funcs.c:279]: t_relay_to():
SER: forwarding ACK statelessly</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">here is the link to: kamailio.cfg,
ngrep -i any capture, debug_level6 log: <a
moz-do-not-send="true" href="http://labmir.com/kamailio/"><a class="moz-txt-link-freetext" href="http://labmir.com/kamailio/">http://labmir.com/kamailio/</a></a></div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">Looking at the SIP ACK that comes
from SIP provider I can see that they use strict routing.</div>
<div class="gmail_default">(i.e. TO field is set to kamailio's
public IP that is next hop to them). </div>
<div class="gmail_default">Maybe I am wrong to judge that its
not loose routing just because of the TO field.<br>
</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">Anyways, because of (failed to
parse Route HF) error, ACKs and BYEs are forwarded by
kamailio statelessly, as a result kamailio uses wrong
interface to forward them (SIP_dailog.txt line:233) and
therefore asterisk never sees ACKs or BYEs.</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">How can I make kamailio recognize
ACKs and BYEs belonging to a dialog and pass them statefully
through the right interface?</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">It is worth to mention that I use
exactly the same config with a different SIP-provider (which
is peered to our PUB IP not registered through UAC like in
this case) and it works flawlessly.</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default">Thank you,</div>
<div class="gmail_default">Mir</div>
<div class="gmail_default"><br>
</div>
<div class="gmail_default"><br>
</div>
</div>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-freetext" href="http://twitter.com/#!/miconda">http://twitter.com/#!/miconda</a> - <a class="moz-txt-link-freetext" href="http://www.linkedin.com/in/miconda">http://www.linkedin.com/in/miconda</a>
Book: SIP Routing With Kamailio - <a class="moz-txt-link-freetext" href="http://www.asipto.com">http://www.asipto.com</a>
Kamailio Advanced Training, Sep 28-30, 2015, in Berlin - <a class="moz-txt-link-freetext" href="http://asipto.com/u/kat">http://asipto.com/u/kat</a></pre>
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