Hello! I am currently testing Freeswitch which, as you probably are aware, relies on Sofia-SIP.
To conduct tests, I am using a Callcentric account. Callcentric uses DNS SRV records as a way to direct traffic to their SIP proxies. A 'srv' 'dig' of '_sip._udp.callcentric.com' returns: _sip._udp.callcentric.com. 10025 IN SRV 20 7 5080 alpha6.callcentric.com. _sip._udp.callcentric.com. 10025 IN SRV 20 7 5080 alpha7.callcentric.com. _sip._udp.callcentric.com. 10025 IN SRV 20 7 5080 alpha1.callcentric.com. _sip._udp.callcentric.com. 10025 IN SRV 20 7 5080 alpha3.callcentric.com. Based on this information, Sofia-SIP appears to correctly round robin all available IP addresses. There is a situation, however, in which this round robin causes problems: in the middle of authorizations. For example, in a registration, Sofia-SIP sends a packet to alpha1.callcentric.com. Callcentric then challenges Sofia-SIP with a Proxy Authorization request. Sofia-SIP then sends the packet with the requested credentials but not necessarily to alpha1.callcentric.com. Sofia-SIP round robins and sends the second packet to one of the other proxies. However, Callcentric proxies don't appear to share a common authorization database and in most cases authorizarion fails. This continues for a little while and eventually, by chance, the second packet is sent to the initial Callcentric proxy. This situation appears to be a Callcentric "bug". However, it would be nice if Sofia-SIP could handle such a scenario by sticking with the original proxy when challenged for authentication even if this behavior deviates slightly from the specs. Is this something that could be implemented, perhaps controlled by a flag? Thanks! Carlos Antunes Nowthor Corporation ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Sofia-sip-devel mailing list Sofia-sip-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sofia-sip-devel
