[Serusers] Multiple contacts

[Yang Xiang]

Hi,

a user, we say yang, is registered from different locations, therefor there
are multiple contacts in the location table like this:
---------------------------------
aor    : 'yang at domain'
Contact: 'sip:10.20.0.100:5060'
q:        1.00

aor    :'yang at domain'
Contact: 'sip:192.44.30.122:16621'
q:        0.00
-----------------------------------

I have configured SER as following:
---------------------------
        if (!lookup("location")) {
                sl_send_reply("404", "Not Found");
                break;
        };

        if (!uri=~"^sip:(.+@)?(10\.20\.).*") {
                forward("192.168.252.2");
                break;
        };

        t_relay();
------------------------------

That says the INVITE should  be forwarded to an outbound proxy 192.168.252.2
if the user is not located in our internal network, e.g. 10.20.0.0/24.
However, the Request-URI will be overwritten with the highest-q rated
contact, in this case with the contact 'sip:10.20.0.100:5060' and the
if-block will be skiped. This induces the INVITE to
'sip:192.44.30.122:16621' will be also directly sent but not via our
outbound proxy 192.168.252.2, what means the messages will be discarded by
the firewall.

Is there any chance to resolve this problem?

Thanks

Yang