Hi All,
I have kamailio setup and listening on logical interfaces (for failover
purposes) and therefore need to force the sending socket on initial
messages. We are testing sips+tls at the moment and what we are trying
to achive is that the TLS connection occurs from the UAC to the edge
proxy (also responsible for the domain) and then force UDP for internal
communications to services.
What I am comming up against is that when I force the sending socket on
the internal interface to UDP, the record route header still shows up as
a "sips" request. Then, at the presense server, when generating the
NOTIFY it attempts to send it to the proxy using TLS.
My understanding was that the record route would set the uri something
like "sip:internal_ip" when forcing the sending socket to be
"udp:internal_ip". Is my understanding correct, or am I doing something
wrong here?
An example subscribe message follows, the top most record-route header,
from my understanding, should read sip:internal_ip, not
sips:internal_ip. Is this the expected behaviour of double rr with these
types of messages? How could I ensure that the top most record-route
would always be a sip uri (never sips).
SUBSCRIBE sips:subscriber@domain.com:5061 SIP/2.0.
Record-Route: <sips:proxy_internal_ip;r2=on;lr;ftag=594055226>.
Record-Route:
<sips:proxy_external_ip:5061;transport=tls;r2=on;lr;ftag=594055226>.
Max-Breadth: 60.
Via: SIP/2.0/UDP
proxy_internal_ip;branch=z9hG4bK6c9.d7dc4801e872ce9fb5730f9e09f1889e.0;i=1.
Via: SIP/2.0/TLS
172.16.0.121:5060;rport=33273;received=78.143.152.30;branch=z9hG4bK708ea7ba.
Max-Forwards: 69.
Call-ID: 17212ff4-4421321c8feafd63bf800080f0808080@KX-HDV230X.
From: <sips:subscriber@domain.com>;tag=594055226.
To: <sips:subscriber@domain.com>.
CSeq: 2 SUBSCRIBE.
Allow: INVITE,ACK,CANCEL,BYE,PRACK,INFO,UPDATE,OPTIONS,MESSAGE,NOTIFY,REFER.
Accept: application/dialog-info+xml,application/rlmi+xml,multipart/related.
Contact: <sips:subscriber@172.16.0.121:5060;alias=78.143.152.30~33273~3>.
Expires: 3600.
Event: dialog.
Any thoughts, tips, tricks would be greatly appreciated.
Cheers