[Serusers] how to use check_to ?

[Tamas J]

Hello!

Finally I got check_to() working well with the uri table. However I
discovered, that there is a problem with some SIP UAs which does not
support or not work well with SRV records.
What I mean:
I have a domain: example.com
My SIP UA doesn't support SRV records, so I have to configure it
directly to use my SIP server. Therefore the UA sends uri like
xyz at hostname.example.com.
My SER is configured to use
                if (method=="REGISTER") {
                        if (!www_authorize("example.com", "subscriber")) {
                                www_challenge("example.com", "0");
                                break;
                        };
                        if (!check_to()) {
                                sl_send_reply("403", "Registration id must does not fit");
                                break;
                        };
                        save("location");
                        break;
                };
In logs I see:
 0(15538) HA1 string calculated: 589858581b9363bcd477f922ff71172a
 0(15538) check_response(): Our result = 'b3fcd7f8f83981c994ff52f388001415'
 0(15538) check_response(): Authorization is OK
 0(15538) save_rpid(): rpid value is ''
 0(15538) check_username(): Digest realm and URI domain do not match
 0(15538) parse_headers: flags=-1
 
What is the most elegant way to solve such case - together with UAs
which can use SRV? Any idea, hints?

Thanks in advance,
        Tamas