Hello,

you have to set authentication username and password inside the $uac_req(...) -- see the attributes for it at:

  - https://www.kamailio.org/wiki/cookbooks/4.4.x/pseudovariables#uac_req_key

Cheers,
Daniel


On 20/01/2017 07:26, anfecora wrote:
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.
From: <sip:14052423@sip.somedomain.com>;tag=a82eaf71666096790d1397845fbd3254-ebaa.
CSeq: 10 REGISTER.
Max-Forwards: 70.
Content-Length: 0.
User-Agent: kamailio (4.4.4 (x86_64/linux)).
Expires: 3600.
.



SIP/2.0 401 Unauthorized.
Via: SIP/2.0/UDP 10.0.0.222:5060;branch=z9hG4bK4b53.ad842757000000000000000000000000.0.
From: <sip:14052423@sip.somedomain.com>;tag=a82eaf71666096790d1397845fbd3254-37da.
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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