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<tt>Hi Rahul<tt>,<br>
<br>
<tt>Indeed, that is a good point<tt> <tt>here, thanks for bring
it up. Let me investiga<tt>te the code a bit and I will
update you.<br>
<br>
<tt><tt>R<tt>egards,</tt></tt></tt><br>
</tt></tt></tt></tt></tt></tt>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 07.07.2016 22:01, Gupta, Rahul
wrote:<br>
</div>
<blockquote
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Bogdan, so the problem we are facing is the endpoint has a
new branch however the difference in the branch value is
<b>AFTER</b> the MAX_BRANCH_PARAM_LEN, the highlighted text.</span><tt><span
style="font-size:10.0pt"> S</span></tt><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">ince
opensips is copying the partial branch which is same as the
previous Via and thus our SIP stack (OCCAS) is sending back
401 Unauthorized for both thinking it’s a retransmit.
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This
is also in line with RFC3261. Shouldn’t it copy the entire
Via to make sure it’s different from previous Message ?<o:p></o:p></span></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt"><o:p> </o:p></span></tt></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">REGISTER
1<o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.204.70.156:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_11391<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.205.236.44:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_1139156<span
style="background:yellow;mso-highlight:yellow">20064228</span>_MTAuMTIuMy4xMQ<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">REGISTER
2<o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.204.70.156:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_11391<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.205.236.44:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_1139156<span
style="background:yellow;mso-highlight:yellow">56050004</span>_MTAuMTIuMy4xMQ</span><tt><span
style="font-size:10.0pt"><o:p></o:p></span></tt></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt"><o:p> </o:p></span></tt></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"
style="margin-bottom:3.0pt;page-break-after:avoid"><b><span
style="font-size:11.0pt;font-family:"Calibri
Light","sans-serif";color:#1F4E79"
lang="EN-GB">Thanks<o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:3.0pt;page-break-after:avoid"><b><span
style="font-size:11.0pt;font-family:"Calibri
Light","sans-serif";color:#1F4E79"
lang="EN-GB">Rahul Gupta</span></b><b><span
style="font-size:11.0pt;font-family:"Calibri
Light","sans-serif";color:#1F4E79"
lang="EN-GB"><o:p></o:p></span></b></p>
<p class="MsoNormal"
style="margin-bottom:6.0pt;page-break-after:avoid"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F4E79"
lang="EN-GB">Systems Architect</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F4E79"
lang="EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR">T</span></b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR"> +1 732-690-3845
</span><span
style="font-size:10.0pt;font-family:Symbol;color:#5B9BD5">|</span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR">
<b>E</b> <a moz-do-not-send="true"
href="mailto:rahul.gupta@ipc.com"><span
style="color:#0563C1">rahul.gupta@ipc.com</span></a>
<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img
id="_x0000_i1026"
src="cid:part2.03070201.02020400@opensips.org"
alt="cid:image006.jpg@01D1940F.3E021840" height="68"
width="163" border="0"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext">
Bogdan-Andrei Iancu [<a class="moz-txt-link-freetext" href="mailto:bogdan@opensips.org">mailto:bogdan@opensips.org</a>]
<br>
<b>Sent:</b> Thursday, July 07, 2016 4:43 AM<br>
<b>To:</b> Gupta, Rahul<br>
<b>Cc:</b> Elliott, Ray; <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opensips.org">users@lists.opensips.org</a><br>
<b>Subject:</b> Re: [OpenSIPS-Users] Truncated Branch in
Via<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi
Rahul,</span></tt><span
style="font-size:10.0pt;font-family:"Courier New""><br>
<br>
<tt>The received VIA hdr (with the .44 IP) is properly
preserved when forwarding (in the outbound message).</tt><br>
<br>
<tt>The VIA hdr added by OpenSIPS ( .156 IP) is a completely
new VIA and its branch value is completely independent
from the branch of other VIA hdrs.</tt><br>
<br>
<tt>Why do they look the same ? The RFC3261 says that for
stateless fwd (when basically there is no transaction, so
no branch value), to avoid populating its VIA with
";branch=0" , the proxy may "copy" and use a branch value
from an older VIA (a received VIA) - keep in mind it does
not say to copy it entirely or part. So, OpenSIPS copies a
MAX_BRANCH_PARAM_LEN length string from the previous
branch param.</tt><br>
<br>
<tt>Everything is correct and legal (from RFC perspective).
</tt><br>
<br>
<tt>PS: if you would use t_relay() instead of forward() -
doing statefull proxy -, you will see that the branch in
the VIA added by OpenSIPS will be completly different from
the value in the previous VIA.
</tt><br>
<br>
<tt>Best regards,</tt><br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 07.07.2016 03:42, Gupta, Rahul wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Bogdan,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Here
is a Ethernet trace (pcap) file that has a successful and
an unsuccessful registration.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Frames
1-8 illustrate the successful case with Frames 2 and 6
show how opensips adds an extra VIA header that has a full
VIA;branch</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Frame:2</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.204.70.156:5060;branch=z9hG4bK-c45d6-2ff0ce63-4583dc45-6bd144f8</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.204.45.122:5060;branch=z9hG4bK-c45d6-2ff0ce63-4583dc45-6bd144f8</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Frames
9-16 illustrate the unsuccessful case where Frames 10 and
14 show how opensips adds an extra VIA header that has a
truncated branch.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Frame
10:</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.204.70.156:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_11391</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
10.205.236.44:5060;branch=z9hG4bK1c68e33e-848e-412a-9137-4fb065a7b7eb_0efbfc5e_11391</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:red;background:yellow;mso-highlight:yellow">5620064228_MTAuMTIuMy4xMQ</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"
style="margin-bottom:3.0pt;page-break-after:avoid"><b><span
style="font-size:11.0pt" lang="EN-GB">Thanks</span></b><o:p></o:p></p>
<p class="MsoNormal"
style="margin-bottom:3.0pt;page-break-after:avoid"><b><span
style="font-size:11.0pt" lang="EN-GB">Rahul Gupta</span></b><o:p></o:p></p>
<p class="MsoNormal"
style="margin-bottom:6.0pt;page-break-after:avoid"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F4E79"
lang="EN-GB">Systems Architect</span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR">T</span></b><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR"> +1 732-690-3845
</span><span
style="font-size:10.0pt;font-family:Symbol;color:#5B9BD5">|</span><span
style="font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="FR">
<b>E</b> <a moz-do-not-send="true"
href="mailto:rahul.gupta@ipc.com"><span
style="color:#0563C1">rahul.gupta@ipc.com</span></a>
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><img
id="Picture_x0020_2"
src="cid:part5.00020905.00030803@opensips.org"
alt="cid:image006.jpg@01D1940F.3E021840" height="68"
width="163" border="0"></span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:windowtext">
Bogdan-Andrei Iancu [<a moz-do-not-send="true"
href="mailto:bogdan@opensips.org">mailto:bogdan@opensips.org</a>]
<br>
<b>Sent:</b> Wednesday, July 06, 2016 5:38 AM<br>
<b>To:</b> OpenSIPS users mailling list<br>
<b>Cc:</b> Elliott, Ray; Gupta, Rahul<br>
<b>Subject:</b> Re: [OpenSIPS-Users] Truncated Branch
in Via</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><tt><span style="font-size:10.0pt">Hi
Rahul,</span></tt><span
style="font-size:10.0pt;font-family:"Courier
New""><br>
<br>
<tt>That define is used to calculate the the max VIA len
when OpenSIPS is generating its own VIA headers. That
max len does not impact the VIA headers which were
received.</tt><br>
<br>
<tt>I do not understand exactly (in your example) what's
the flow of that VIA header. If you want, send me
off-list the pcap/ngrep showing the SIP package (before
and after OpenSIPS) and how it is affected.</tt><br>
<br>
<tt>Regards,</tt><br>
<br>
<br>
</span><o:p></o:p></p>
<pre>Bogdan-Andrei Iancu<o:p></o:p></pre>
<pre>OpenSIPS Founder and Developer<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a><o:p></o:p></pre>
<div>
<p class="MsoNormal">On 05.07.2016 20:57, Gupta, Rahul
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">We
are using opensips 1.11.5 as a stateless proxy and
seeing a truncated Branch in Via for my REGISTER
message. After some code digging, the MAX length is
calculated using the following formula and seems like
its truncating the branch after 55 characters. This is
causing the REGISTER to fail in our case. Is there a
config level solution to this ?</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">#define
MAX_BRANCH_PARAM_LEN (MCOOKIE_LEN+8
/*!<int2hex*/ + 1 /*sep*/ + \</span></b><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
MD5_LEN + 1 /*!<sep*/ + 8 /*int2hex*/ + \</span></b><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif"">
1 /*extra space, needed by t_calc_branch*/)</span></b><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">truncated
from opensips
</span><span
style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">à</span><span
style="font-size:11.0pt;color:#1F497D"> </span><span
style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">
</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via:
SIP/2.0/UDP
XX.XX.XX.XX:5060;branch=z9hG4bK0fddbbc9-1487-4755-a0b3-0c319155b8c3_0efbfc5e_11160 </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Via
from EndPoint </span><span
style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">à</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
Via: SIP/2.0/UDP
XX.XX.XX.XX:5060;branch=z9hG4bK0fddbbc9-1487-4755-a0b3-0c319155b8c3_0efbfc5e_11160<span
style="background:yellow">78308924346_MTAuMTIuMy4xMQ</span> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div style="margin-bottom:3.0pt">
<p class="MsoNormal"><b><span style="font-size:11.0pt">Thanks</span></b><o:p></o:p></p>
</div>
<div style="margin-bottom:3.0pt">
<p class="MsoNormal"><b><span style="font-size:11.0pt">Rahul
Gupta</span></b><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><o:p></o:p></p>
</div>
<div>
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<o:p></o:p></p>
</div>
<p class="MsoNormal"><br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>Users mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:Users@lists.opensips.org">Users@lists.opensips.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://lists.opensips.org/cgi-bin/mailman/listinfo/users">http://lists.opensips.org/cgi-bin/mailman/listinfo/users</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</blockquote>
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