[SR-Users] UAC authentication

[anfecora]

can someone please guide me where to find the usage of auc module, thanks
in advance.

I am registering the uac in one end then i want to forward that
registration to an external registrar, if i use $du some domain, some of
the ipv6 info is going to be forwarded, i need to make it look more like an
a b2bua than a outbound proxy therefore i need to use the auc module(also i
need to cover all ipv6 info since i am proxying from ipv4 to ipv6).

i am able to register the client to kamailio, then kamailio send the
registration to the external registrar, but when the registrar sends back
the challenge uac does not reply, any ideas how can achieve this.

uac(linphone etc) --registration--->kamailio(registrar
module)------register(uac)--->SBC

sbc----invite---->kamailio(lookup)---------invite---->uac(linphone etc)

this is the code i am using.



# Handle SIP registrations
route[REGISTRAR] {
xlog("REGISTERING ");
        if (is_method("REGISTER"))
        {
                if(isflagset(FLT_NATS))
                {
                        setbflag(FLB_NATB);
                        # uncomment next line to do SIP NAT pinging
                        ## setbflag(FLB_NATSIPPING);
                }
                if(af==INET6)
                        setbflag(FLB_IPV6);
xlog("IT IS  IPV6");
                if (!save("location"))
                        sl_reply_error();
route(REGSBCFWD);
        exit;
        }
}

route[REGSBCFWD]{
xlog("CREATING OTHER LEG TO THE SBC");
if(!is_method("REGISTER"))
        {
                return;
        }
xlog("CREATING PACKAGE $si -- $fU-- $au--$du-- $tU --$ru");

        $var(rip) = "sip.somedomain.com";
        $uac_req(method)="REGISTER";
        $uac_req(ruri)="sip:" + $var(rip) + ":" + "5060";
        $uac_req(furi)="sip:" + $tU + "@" + $var(rip);
        $uac_req(turi)="sip:" + $tU + "@" + $var(rip);
        $uac_req(hdrs)="Contact: <sip:" + $tU + "@"
                                + "10.0.0.222"
                                + ":" "5060" + ">\r\n";
        if($sel(contact.expires) != $null)
                $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
$sel(contact.expires) + "\r\n";
        else
                $uac_req(hdrs)= $uac_req(hdrs) + "Expires: " +
$hdr(Expires) + "\r\n";
        uac_req_send();



                }





REGISTER sip:sip.somedomain.com:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.0.0.222:5060
;branch=z9hG4bK285f.13a7f0c0000000000000000000000000.0.
To: <sip:14052423 at sip.somedomain.com>.
From: <sip:14052423 at sip.somedomain.com
>;tag=a82eaf71666096790d1397845fbd3254-ebaa.
CSeq: 10 REGISTER.
Call-ID: 357e21ae51d8416d-26605 at 10.0.0.222.
Max-Forwards: 70.
Content-Length: 0.
User-Agent: kamailio (4.4.4 (x86_64/linux)).
Contact: <sip:140524 at 10.0.0.222:5060>.
Expires: 3600.
.



SIP/2.0 401 Unauthorized.
Via: SIP/2.0/UDP 10.0.0.222:5060
;branch=z9hG4bK4b53.ad842757000000000000000000000000.0.
To: <sip:14052423 at sip.somedomain.com>.
From: <sip:14052423 at sip.somedomain.com
>;tag=a82eaf71666096790d1397845fbd3254-37da.
Call-ID: 357e21ae51d8416d-26603 at 10.0.0.222.
CSeq: 10 REGISTER.
WWW-Authenticate: Digest realm="sip.somedomain.com",
nonce="f5831435-3e69-4b78-ab6d-dcb0897e477b", algorithm=MD5, qop="auth".
User-Agent: somedomain.com Host:some proxy.
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER,
REFER, NOTIFY, PUBLISH, SUBSCRIBE.
Content-Length: 0.
.
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