[sr-dev] Bug in Record-Route (???) / undocumented behaviour

Hi, I have a server listening on a single tls-socket: -------------------------------------------------------------------------- Bug in Record-Route??? -------------------------------------------------------------------------- listen=tls:47.11.23.42:443 I use this socket for both Websocket and SIP-TLS. Kamailio basically does a WebSockets to SIP-TLS translation. For simplicity reasons, I use only one TLS socket for both TLS and WebSockets. If I simply do the following in my routing-script: record_route(); $du = "sip:server;transport=tls"; it will simply add a single Record-Route header, e.g.: Record-Route: <sip:47.11.23.42:443;transport=ws> It will only add this single Record-Route header, despite the fact, that it's actually translating between WebSocket and SIP-TLS. The expected behaviour would be: Record-Route: <sip:47.11.23.42:443;transport=ws> Record-Route: <sip:47.11.23.42:443;transport=tls> The problem is, that the upstream Proxy (a loadbalancer) only speaks SIP-TLS and UDP (for Interconnecting) and not WebSockets. As a result, in-Dialog-Requests fail, as the Loadbalancer cannot reach the next hop using "transport=ws". In the code, I did see, that COND_IF_DIFF_REALMS actually should also check the protocol, so I'm not sure, why this is not happening. -------------------------------------------------------------------------- Undocumented Feature / Workaround -------------------------------------------------------------------------- Looking at the code of RR, I've found that I can actually set "enable_double_rr" to 2, which will ALWAYS add a second Record-Route header. Apart from the fact, that I don't need the second record-route header always, it solves my problem. At least the latter I will add to the docs, but however I haven't found any time to look any deeper into the Bug. Thanks, Carsten -- Carsten Bock CEO (Geschäftsführer) ng-voice GmbH Millerntorplatz 1 20359 Hamburg / Germany http://www.ng-voice.com mailto:carsten@ng-voice.com Office +49 40 5247593-40 Fax +49 40 5247593-99 Sitz der Gesellschaft: Hamburg Registergericht: Amtsgericht Hamburg, HRB 120189 Geschäftsführer: Carsten Bock Ust-ID: DE279344284 Hier finden Sie unsere handelsrechtlichen Pflichtangaben: http://www.ng-voice.com/imprint/