Howdy,<br><br>I'm running into an issue with a load testing tool I'm using generating arbitrary REGISTER messages to opensips 1.4.5. Note, this is not a retransmit. (Note, personal info like IPs obfuscated).<br><br>
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<p class="MsoNormal">REGISTER <a href="sip:205.139.46.237">sip:1.2.3.4</a>
SIP/2.0.</p>
<p class="MsoNormal">Max-Forwards: 70.</p>
<p class="MsoNormal">Via: SIP/2.0/UDP 4.3.2.1:6701;branch=z9hG4bK11-453d6165-0029-1843224199.</p>
<p class="MsoNormal">Call-ID: 841-090708015608-1269668688@453d6165.</p>
<p class="MsoNormal"><b>CSeq: 532839396 REGISTER</b>.</p>
<p class="MsoNormal">From:
<<a href="mailto:sip%3Auser@1.2.3.4">sip:user@1.2.3.4</a>>;tag=11044-453d6165-090708015608-1273695453.</p>
<p class="MsoNormal">To: <<a href="mailto:sip%3Auser@1.2.3.4">sip:user@1.2.3.4</a>>.</p>
<p class="MsoNormal">Contact:
<sip:user@4.3.2.1:6701;transport=udp>.</p>
<p class="MsoNormal">Expires: 3600.</p>
<p class="MsoNormal">Accept: application/sdp, application/dtmf-relay.</p>
<p class="MsoNormal">Content-Length: 0.</p>
<p class="MsoNormal">.</p>
<p class="MsoNormal"> </p><p class="MsoNormal">SIP/2.0 400 Bad Request.</p>
<p class="MsoNormal">Via: SIP/2.0/UDP 4.3.2.1;branch=z9hG4bK11-453d6165-0029-1843224199;rport=6701.</p>
<p class="MsoNormal">Call-ID: 841-090708015608-1269668688@453d6165.</p>
<p class="MsoNormal">CSeq: 532839396 REGISTER.</p>
<p class="MsoNormal">From:
<<a href="mailto:sip%3Auser@1.2.3.4">sip:user@1.2.3.4</a>>;tag=11044-453d6165-090708015608-1273695453.</p>
<p class="MsoNormal">To:
<<a href="mailto:sip%3Auser@1.2.3.4">sip:user@1.2.3.4</a>>;tag=d956cb2540203ca43d36f1e0fd077845.d8d0.</p>
<p class="MsoNormal">Contact: <sip:user@1.2.3.4:6701;transport=udp>;expires=21;received="sip:<a href="http://1.2.3.4:6701">1.2.3.4:6701</a>".</p>
<p class="MsoNormal"><b>P-Registrar-Error: Invalid CSeq number.</b></p>
<p class="MsoNormal">Server: OpenSIPS SIP r-1.4.5.</p><p class="MsoNormal"><br></p><p class="MsoNormal"><br></p><p class="MsoNormal">I believe the problem is that the cseq number is to the order of 5*10^8. According to the RFC (and a handy post I found from the Sip-Implementors mailing list, see here: <meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 12"><meta name="Originator" content="Microsoft Word 12"><link rel="File-List" href="file:///C:%5CUsers%5Cbsmith%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><link rel="themeData" href="file:///C:%5CUsers%5Cbsmith%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx"><link rel="colorSchemeMapping" href="file:///C:%5CUsers%5Cbsmith%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_colorschememapping.xml"><style>
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</style><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);"><a href="https://lists.cs.columbia.edu/pipermail/sip-implementors/2007-February/015380.html">https://lists.cs.columbia.edu/pipermail/sip-implementors/2007-February/015380.html</a></span>), we should be able to have an initial CSeq value up to 2^31-1, or around 2*10^9 (positive).</p>
<p class="MsoNormal"><br></p><p class="MsoNormal">Unfortunately, it's being generated completely randomly, and the vendor has said there doesn't seem to be an issue on their end with their scheme on generating this or a way to change it. All the logging that I can tell on the OpenSIPS side points to the CSeq just being completely invalid; I've ran into retransmits with the same CSeq before causing this issue, but that's not what appears to be happening here.</p>
<p class="MsoNormal"><br></p><p class="MsoNormal">Any insight into this issue?<br><br>Thanks.<br></p>