23 Mar
2010
23 Mar
'10
8:42 a.m.
Am 22.03.2010 21:00, schrieb Uriel Rozenbaum:
Hi gentlemen,
I'm having a bit of a hard time developing a bridge for media sessions.
I have a box with 2 interfaces; eth0 has the private IP p.r.i.v and eth1
has public IP p.u.b.l.
When I receive a message in the private IP I try sending the call to a
public proxy we have (p.u.b.2) using Carrierroute module but the source
IP used is p.r.i.v. It is obvious that p.u.b.2 will not be able to route
back messages.
#
U 192.168.200.11:5060 <http://192.168.200.11:5060> -> p.r.i.v:5060
INVITE sip:1568767139@p.r.i.v SIP/2.0.
Via: SIP/2.0/UDP 192.168.200.11:5060;branch=z9hG4bK5d94bc09.
From: "60911000" <sip:60911000@p.r.i.v>;tag=as6d477d46.
To: <sip:1568767139@p.r.i.v>.
Contact: <sip:60911000@192.168.200.11
<mailto:sip%3A60911000@192.168.200.11>>.
...
#
U p.r.i.v:5060 -> p.u.b.2:5060
INVITE sip:1568767139@p.u.b.2 SIP/2.0.
Record-Route: <sip:p.r.i.v;lr=on;ftag=as6d477d46>.
Via: SIP/2.0/UDP p.r.i.v;branch=z9hG4bKf531.440788e1.0.
Via: SIP/2.0/UDP
192.168.200.11:5060;rport=5060;received=192.168.200.11;branch=z9hG4bK5d94bc09.
From: "60911000" <sip:60911000@p.r.i.v>;tag=as6d477d46.
To: <sip:1568767139@p.r.i.v>.
Contact: <sip:60911000@192.168.200.11
<mailto:sip%3A60911000@192.168.200.11>>.
...
I try then to set listen=0.0.0.0 so kamailio will be binded to all IPs
but then the Route headers and Via use this 0.0.0.0
This is really weird.
Usually you configure each interface separately. Then Kamailio should
choose the proper IP address in Via and RR headers:
listen=udp:p.r.i.v:5060
listen=udp:p.u.b.2:5060
regards
klaus
#
U 192.168.200.11:5060 <http://192.168.200.11:5060> -> p.r.i.v:5060
INVITE sip:1568767139@p.r.i.v SIP/2.0.
Via: SIP/2.0/UDP 192.168.200.11:5060;branch=z9hG4bK14a00df7.
From: "60911000" <sip:60911000@p.r.i.v>;tag=as502405cf.
To: <sip:1568767139@p.r.i.v>.
Contact: <sip:60911000@192.168.200.11
<mailto:sip%3A60911000@192.168.200.11>>.
...
#
U p.u.b.l:5060 -> p.u.b.2:5060
INVITE sip:1568767139@p.u.b.2 SIP/2.0.
Record-Route: <sip:0.0.0.0;lr=on;ftag=as502405cf>.
Via: SIP/2.0/UDP 0.0.0.0;branch=z9hG4bK711b.8d28549.0.
Via: SIP/2.0/UDP
192.168.200.11:5060;rport=5060;received=192.168.200.11;branch=z9hG4bK14a00df7.
From: "60911000" <sip:60911000@p.r.i.v>;tag=as502405cf.
To: <sip:1568767139@p.r.i.v>.
Contact: <sip:60911000@192.168.200.11
<mailto:sip%3A60911000@192.168.200.11>>.
...
In this case the destination UA cannot return the call because it does
not have a valid IP to do so.
Is there any way to make Kamailio act in a different way? Like letting
me modify the IP it will use for Via and Record-Route headers. Be aware
that I'm supposed to do some kind of mirror for calls coming from
outside the network (origin is public and destination is private).
I'm sure I'll be asking some more on this same thread as I test.
Thanks in advance!
Uriel
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