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Hello,<br>
<br>
if none of your server side has mangled the SIP packets, then there
might be some ALG (in the home router or the ISP) that breaks the
sip packets. You can try using different port that 5060 or switch to
tcp/tls.<br>
<br>
Cheers,<br>
Daniel<br>
<br>
<div class="moz-cite-prefix">On 28/05/15 16:19, Badri Ranganathan
wrote:<br>
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<p class="MsoNormal"><span style="color:#4F81BD">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">I am answering
a SIP call made to my softphone. The softphone rings and
also sends a 200 OK correctly. But the other end that made
the call is seeing a failure in the SDP of the 200 OK
packet.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
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<pre style="line-height:13.5pt;background:white;vertical-align:baseline"><span style="color:#4F81BD">This error is seen in SDP header => </span><span style="color:#555555">Invalid SDP line (no '=' delimiter) error<o:p></o:p></span></pre>
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<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">w.r.t
w_frame4_public_ip.pcap It looks like the failure as seen in
wireshark is because line “audio 5000 RTP/AVP 8 101” should
really be “m= audio 5000 RTP/AVP 8 101”<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">so it doesn’t
see the ‘=’ delimiter.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">But if you look
at w_frame52_local_ip.pcap, the packets sent from the local
IP has the contents correct.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">It is only
after passing the public IP and at the network premises,
that this failure is reported by the Session Border
controller.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">I am not able
to understand why a correctly formed packet sent out is seen
“corrupted” at the network end.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">Any ideas
really appreciated.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#4F81BD">Badri.<o:p></o:p></span></p>
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<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>
Kamailio World Conference, May 27-29, 2015
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