30 Apr
2010
30 Apr
'10
9:03 p.m.
Hello,
it might not be the solution, because they should route based on
Record-Route headers, not on Contact header. Anyhow changing the Contact
will break the routing, so you will need to store somehow the original
contact.
You can do manual detection in case you do bridging, by checking the
receiving interface, $Ri is the local IP where the request was received,
therfore you will be sending on the other interface. Are you doing force
send socket to select outgoing interface? If yes, then is where you know
the local ip for sending.
Cheers,
Daniel
On 4/30/10 6:32 PM, Uriel Rozenbaum wrote:
Guys,
I'm successfully using a Kamailio + RTPproxy setup in bridge mode with
most of my Gateways. My setup includes two different interfaces one
with a public IP and teh other with the private IP.
Now I'm facing some slight issue. Some providers won't accept my calls
(or calls will have some strange behavior) if the Contact header has
an IP out of immediate range.
I tried to use fix_nated_contact() function but as per my topology,
this function will not change the contact header because the IP is
already the one on the interface.
Example:
U 192.168.200.X:5060 -> 192.168.200.Y:5060
INVITE sip:111160911097@192.168.200.Y SIP/2.0.
Via: SIP/2.0/UDP 192.168.200.X:5060;branch=z9hG4bK096baacc;rport.
From: "Uriel Rozenbaum" <sip:60911100@192.168.200.X>;tag=as32794d5e.
To: <sip:111160911097@192.168.200.Y>.
Contact: <sip:60911100@*192.168.200.X*>.
U 200.A.A.A:5060 -> 200.B.B.B:5060
INVITE sip:898960911097@200.B.B.B SIP/2.0.
Record-Route: <sip:200.A.A.A;r2=on;lr=on;ftag=as32794d5e>.
Record-Route: <sip:192.168.200.Y;r2=on;lr=on;ftag=as32794d5e>.
Via: SIP/2.0/UDP 200.A.A.A;branch=z9hG4bK5222.14fbf4f7.0.
Via: SIP/2.0/UDP
192.168.200.X:5060;received=192.168.200.X;branch=z9hG4bK096baacc;rport=5060.
From: "Uriel Rozenbaum" <sip:60911100@192.168.200.X>;tag=as32794d5e.
To: <sip:111160911097@192.168.200.Y>.
Contact: <sip:60911100@*192.168.200.X*>.
Is there any way to let know Kamailio the outgoing IP I'll be using
and fix the contact accordingly?
I can trigger this change after I know the destination IP.
Thanks!
Uriel
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--
Daniel-Constantin Mierla
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