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<p>Hello,</p>
<p>so it seems that FreeSwitch is not handling properly the Path
header. As you can see, that Path in REGISTER is:</p>
<p>Path:
<a class="moz-txt-link-rfc2396E" href="sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063"><sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063></a><br>
</p>
<p>But the INVITE has the ROUTE:</p>
<p>Route:
<a class="moz-txt-link-rfc2396E" href="sip:KAMAILIO_PUBLIC_IP"><sip:KAMAILIO_PUBLIC_IP></a>;lr;received=<a class="moz-txt-link-freetext" href="sip:UAC_PUBLIC_IP:5063">sip:UAC_PUBLIC_IP:5063</a><br>
</p>
<p>The closing '>' is no longer at the end, making lr and
received header parameters, instead of uri parameters.<br>
</p>
If there is nothing easy to fix in freeswitch, you can try to:<br>
- use add_path() instead of add_path_received()<br>
- use set_contact_alias() instead of fix_nated_contact() and
fix_nated_register() and then when the INVITE comes from FreeSwitch
use handle_ruri_alias()<br>
<br>
Because I encountered other sip apps that get confused by the value
of received parameter in the Path, I added in master branch an
alternative:<br>
<br>
-
<a class="moz-txt-link-freetext" href="https://www.kamailio.org/docs/modules/devel/modules/path.html#path.p.received_format">https://www.kamailio.org/docs/modules/devel/modules/path.html#path.p.received_format</a><br>
<br>
But for this you need to install from git master.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 21.07.17 12:22, Iskren Hadzhinedev
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:9066e087-3664-cffe-4dc4-c8db1fa1144f@ikiji.com">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<font face="Calibri">Hi Daniel,<br>
Yes, those headers are extracted from a wireshark pcap.<br>
Yes, kamailio is listening on a public IP address without any
sort of NAT.<br>
<br>
Here's the REGISTER sent from kamailio to FreeSWITCH, copied
from a pcap using wireshark with IPs replaced:<br>
<br>
</font><tt>Session Initiation Protocol (REGISTER)</tt><tt><br>
</tt><tt> Request-Line: REGISTER <a
class="moz-txt-link-freetext" href="sip:sip.test.com:5060"
moz-do-not-send="true">sip:sip.test.com:5060</a> SIP/2.0</tt><tt><br>
</tt><tt> Method: REGISTER</tt><tt><br>
</tt><tt> Request-URI: <a class="moz-txt-link-freetext"
href="sip:sip.test.com:5060" moz-do-not-send="true">sip:sip.test.com:5060</a></tt><tt><br>
</tt><tt> Request-URI Host Part: sip.test.com</tt><tt><br>
</tt><tt> Request-URI Host Port: 5060</tt><tt><br>
</tt><tt> [Resent Packet: False]</tt><tt><br>
</tt><tt> Message Header</tt><tt><br>
</tt><tt> Record-Route: <a class="moz-txt-link-rfc2396E"
href="sip:KAMAILIO_PUBLIC_IP;lr=on;ftag=1015994109"
moz-do-not-send="true"><sip:KAMAILIO_PUBLIC_IP;lr=on;ftag=1015994109></a></tt><tt><br>
</tt><tt> Via: SIP/2.0/UDP
KAMAILIO_PUBLIC_IP;branch=z9hG4bKb4a9.4cbfa8e6cdc8083ffe5ff1ea228fea26.0</tt><tt><br>
</tt><tt> Via: SIP/2.0/UDP
192.168.1.200:5063;rport=5063;received=UAC_PUBLIC_IP;branch=z9hG4bK332629336</tt><tt><br>
</tt><tt> From: <a class="moz-txt-link-rfc2396E"
href="sip:1001@sip.test.com" moz-do-not-send="true"><sip:1001@sip.test.com></a>;tag=1015994109</tt><tt><br>
</tt><tt> To: <a class="moz-txt-link-rfc2396E"
href="sip:1001@sip.test.com" moz-do-not-send="true"><sip:1001@sip.test.com></a></tt><tt><br>
</tt><tt> Call-ID: <a class="moz-txt-link-abbreviated"
href="mailto:1821101462@192.168.1.200" moz-do-not-send="true">1821101462@192.168.1.200</a></tt><tt><br>
</tt><tt> CSeq: 1 REGISTER</tt><tt><br>
</tt><tt> Contact: <a class="moz-txt-link-rfc2396E"
href="sip:1001@192.168.1.200:5063" moz-do-not-send="true"><sip:1001@192.168.1.200:5063></a></tt><tt><br>
</tt><tt> Allow: INVITE, INFO, PRACK, ACK, BYE, CANCEL,
OPTIONS, NOTIFY, REGISTER, SUBSCRIBE, REFER, PUBLISH, UPDATE,
MESSAGE</tt><tt><br>
</tt><tt> Max-Forwards: 69</tt><tt><br>
</tt><tt> User-Agent: Yealink SIP-T42G 29.72.23.5</tt><tt><br>
</tt><tt> Expires: 3600</tt><tt><br>
</tt><tt> Allow-Events:
talk,hold,conference,refer,check-sync</tt><tt><br>
</tt><tt> Content-Length: 0</tt><tt><br>
</tt><tt> Path: <a class="moz-txt-link-rfc2396E"
href="sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063"
moz-do-not-send="true"><sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063></a></tt><tt><br>
</tt><tt> Path URI: <a class="moz-txt-link-freetext"
href="sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063"
moz-do-not-send="true">sip:KAMAILIO_PUBLIC_IP;lr;received=sip:UAC_PUBLIC_IP:5063</a></tt><tt><br>
</tt><tt> Path Host Part: KAMAILIO_PUBLIC_IP</tt><tt><br>
</tt><tt> Path URI parameter: lr</tt><tt><br>
</tt><tt> Path URI parameter: received=<a
class="moz-txt-link-freetext" href="sip:UAC_PUBLIC_IP:5063"
moz-do-not-send="true">sip:UAC_PUBLIC_IP:5063</a></tt><tt><br>
</tt><font face="Calibri"><br>
And this is the test INVITE from FreeSWITCH to kamailio:<br>
<br>
</font><tt>Session Initiation Protocol (INVITE)</tt><tt><br>
</tt><tt> Request-Line: INVITE <a
class="moz-txt-link-freetext"
href="sip:1001@192.168.1.200:5063" moz-do-not-send="true">sip:1001@192.168.1.200:5063</a>
SIP/2.0</tt><tt><br>
</tt><tt> Message Header</tt><tt><br>
</tt><tt> Via: SIP/2.0/UDP
FREESWITCH_PUBLIC_IP;rport;branch=z9hG4bK543jg8S9Ng8gm</tt><tt><br>
</tt><tt> Route: <a class="moz-txt-link-rfc2396E"
href="sip:KAMAILIO_PUBLIC_IP" moz-do-not-send="true"><sip:KAMAILIO_PUBLIC_IP></a>;lr;received=<a
class="moz-txt-link-freetext" href="sip:UAC_PUBLIC_IP:5063"
moz-do-not-send="true">sip:UAC_PUBLIC_IP:5063</a></tt><tt><br>
</tt><tt> Max-Forwards: 70</tt><tt><br>
</tt><tt> From: "" <a class="moz-txt-link-rfc2396E"
href="sip:0000000000@FREESWITCH_PUBLIC_IP"
moz-do-not-send="true"><sip:0000000000@FREESWITCH_PUBLIC_IP></a>;tag=DyFB81r40609Q</tt><tt><br>
</tt><tt> To: <a class="moz-txt-link-rfc2396E"
href="sip:1001@192.168.1.200:5063" moz-do-not-send="true"><sip:1001@192.168.1.200:5063></a></tt><tt><br>
</tt><tt> Call-ID: fad5ae53-e89d-1235-d8b5-00163e50ea42</tt><tt><br>
</tt><tt> CSeq: 109979488 INVITE</tt><tt><br>
</tt><tt> Contact: <a class="moz-txt-link-rfc2396E"
href="sip:mod_sofia@FREESWITCH_PUBLIC_IP:5060"
moz-do-not-send="true"><sip:mod_sofia@FREESWITCH_PUBLIC_IP:5060></a></tt><tt><br>
</tt><tt> User-Agent: FreeSWITCH-1.6.9-16-d574870~64bit</tt><tt><br>
</tt><tt> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS,
MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH,
SUBSCRIBE</tt><tt><br>
</tt><tt> Supported: timer, path, replaces</tt><tt><br>
</tt><tt> Allow-Events: talk, hold, conference, presence,
as-feature-event, dialog, line-seize, call-info, sla,
include-session-description, presence.winfo, message-summary,
refer</tt><tt><br>
</tt><tt> Content-Type: application/sdp</tt><tt><br>
</tt><tt> Content-Disposition: session</tt><tt><br>
</tt><tt> Content-Length: 319</tt><tt><br>
</tt><tt> X-FS-Support: update_display,send_info</tt><tt><br>
</tt><tt> Message Body</tt><tt><br>
</tt><tt> Session Description Protocol</tt><tt><br>
</tt><tt> Session Description Protocol Version (v): 0</tt><tt><br>
</tt><tt> Owner/Creator, Session Id (o): FreeSWITCH
1500611681 1500611682 IN IP4 FREESWITCH_PUBLIC_IP</tt><tt><br>
</tt><tt> Session Name (s): FreeSWITCH</tt><tt><br>
</tt><tt> Connection Information (c): IN IP4
FREESWITCH_PUBLIC_IP</tt><tt><br>
</tt><tt> Time Description, active time (t): 0 0</tt><tt><br>
</tt><tt> Media Description, name and address (m):
audio 19424 RTP/AVP 9 0 8 3 101 13</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:9 G722/8000</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:0 PCMU/8000</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:8 PCMA/8000</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:3 GSM/8000</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:101
telephone-event/8000</tt><tt><br>
</tt><tt> Media Attribute (a): fmtp:101 0-16</tt><tt><br>
</tt><tt> Media Attribute (a): rtpmap:13 CN/8000</tt><tt><br>
</tt><tt> Media Attribute (a): ptime:20</tt><tt><br>
</tt><font face="Calibri"><br>
As always, thanks for all your help!<br>
<br>
Kind regards,<br>
</font>
<div class="moz-signature">
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charset=utf-8">
<div class="moz-signature">
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charset=utf-8">
<title></title>
Iskren<br>
<br>
</div>
</div>
<div class="moz-cite-prefix">On 21.7.2017 г. 11:42,
Daniel-Constantin Mierla wrote:<br>
</div>
<blockquote type="cite"
cite="mid:4fb9d947-8297-3f79-aec8-9587aa38c8c9@gmail.com">
<meta http-equiv="Content-Type" content="text/html;
charset=utf-8">
<p>Hello,</p>
<p>are you sure that the Route is like that? The lr parameter
and received should be between angle brakets <> along
with the sip uri.</p>
<p>Maybe you should paste here the full REGISTER sent to sip
server after adding the path as well as the INVITE received
later. You can replace the IP addresses that are sensitive for
you, but keel everything else as it is in order to see if
there is something wrong in the headers.</p>
<p>Btw, the To header has nothing to do with routing, the R-URI
will be also relevant in this case.</p>
<p>Is kamailio listening directly on a public ip?<br>
</p>
<p>Cheers,<br>
Daniel<br>
</p>
<br>
<div class="moz-cite-prefix">On 20.07.17 17:18, Iskren
Hadzhinedev wrote:<br>
</div>
<blockquote type="cite"
cite="mid:6dea34b0-c326-da12-c49a-3feef9b9f55c@ikiji.com">
<meta http-equiv="content-type" content="text/html;
charset=utf-8">
<p>Hello,</p>
<p>I have a kamailio proxy in front of FreeSWITCH.</p>
<p>Whenever FreeSWITCH initiates the dialog (e.g. sends an
INVITE), kamailio doesn't use the 'received' parameter and
it forwards to the RFC1918 IP address. The initial INVITE
from FreeSWITCH has the following headers:</p>
<tt>To: <a class="moz-txt-link-rfc2396E"
href="sip:1001@192.168.1.200:5063" moz-do-not-send="true"><sip:1001@192.168.1.200:5063></a></tt><tt><br>
</tt><tt>Route: <a class="moz-txt-link-rfc2396E"
href="sip:1.2.3.4" moz-do-not-send="true"><sip:1.2.3.4></a>;lr;received=<a
class="moz-txt-link-freetext" href="sip:5.6.7.8:5063"
moz-do-not-send="true">sip:5.6.7.8:5063</a></tt><br>
<br>
Where <tt>1.2.3.4</tt> is the kamailio public IP and<tt>
5.6.7.8</tt> is the public IP of the UAC behind NAT.<br>
I have <tt>modparam("path", "use_received", 1)</tt> in my
config file and to my understanding that should be sufficient
to route to the proper IP, but kamailio keeps sending INVITEs
to <tt>192.168.1.200</tt>.<br>
<br>
Can anyone tell me what am I missing?<br>
Thanks!<br>
<br>
Kind regards,<br>
Iskren<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
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</pre>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<a class="moz-txt-link-abbreviated" href="http://www.twitter.com/miconda" moz-do-not-send="true">www.twitter.com/miconda</a> -- <a class="moz-txt-link-abbreviated" href="http://www.linkedin.com/in/miconda" moz-do-not-send="true">www.linkedin.com/in/miconda</a>
Kamailio Advanced Training - <a class="moz-txt-link-abbreviated" href="http://www.asipto.com" moz-do-not-send="true">www.asipto.com</a>
Kamailio World Conference - <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com" moz-do-not-send="true">www.kamailioworld.com</a></pre>
</blockquote>
<br>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Daniel-Constantin Mierla
<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>
Kamailio Advanced Training - <a class="moz-txt-link-abbreviated" href="http://www.asipto.com">www.asipto.com</a>
Kamailio World Conference - <a class="moz-txt-link-abbreviated" href="http://www.kamailioworld.com">www.kamailioworld.com</a></pre>
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