Description

Following this scenario:

Softphone <-> Kamailio <-> Asterisk

1- Softphone registers with kamailio (REGISTER)
2- Kamailio challenges... (401)
3- Softphone registers with kamailio (REGISTER + Auth info)
4- Kamailio accepts (200)
5- If Kamailio accepted, it sends a REGISTER to asterisk (REGISTER)
6- Asterisk challenges... (401)
7- Kamailio authenticates (REGISTER + Auth info)
8- Asterisk accepts (200)

(NOTE: I know you can avoid Asterisk re-requesting for authentication, but in this case it's mandatory.)

kamailio.cfg has this:

        $var(rip) = $(avp(s:dsp_uri_list){uri.host});
        $var(rip_port) = $(avp(s:dsp_uri_list){uri.port});
        $uac_req(method)="REGISTER";
        $uac_req(auser)=$avp(customer_user);
        $uac_req(apasswd)=$avp(customer_pass);
        $uac_req(ruri)="sip:" + $var(rip) + ":" + $var(rip_port);
        $uac_req(furi)="sip:" + $au + "@" + $var(rip);
        $uac_req(turi)="sip:" + $au + "@" + $var(rip);
        $uac_req(hdrs)="Contact: <sip:" + $au + "@X.X.X.X:5060>\r\n";
        $uac_req(evroute)=1;
        if ($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();

and this:

# Log replies from uac_req_send()
event_route[uac:reply] {
    xlog("L_NOTICE", "[UAC] - $uac_req(method) request from user $uac_req(auser) to $uac_req(ruri) completed with code: $uac_req(evcode)\n");
}

The result:

Jul 20 16:49:42 sbc01 sbc[5236]: NOTICE: <script>: [UAC] - REGISTER request from user XXXXX to sip:A.B.C.D:5060 completed with code: 401
Jul 20 16:51:05 sbc01 sbc[5240]: NOTICE: <script>: [UAC] - REGISTER request from user XXXXX to sip:A.B.C.D:5060 completed with code: 401
Jul 20 16:51:49 sbc01 sbc[5241]: NOTICE: <script>: [UAC] - REGISTER request from user XXXXX to sip:A.B.C.D:5060 completed with code: 401
Jul 20 17:00:06 sbc01 sbc[5239]: NOTICE: <script>: [UAC] - REGISTER request from user XXXXX to sip:A.B.C.D:5060 completed with code: 401
Jul 20 17:09:06 sbc01 sbc[5240]: NOTICE: <script>: [UAC] - REGISTER request from user XXXXX to sip:A.B.C.D:5060 completed with code: 401

I was expecting for $uac_req(evcode) to be 200, but it's 401.

Reproduction

Generate a REGISTER using uaq_send_req() with auser and apasswd set, and then print the $uac_req(evcode) from the corresponding event_route[].

Possible Solutions

Not sure if the 401 is expected because it was the first final response, period.

Or, (when using authentication), it should be updated to 200 or whatever the reply is after sending the REGISTER with auth info.

Additional Information

• Kamailio Version - output of kamailio -v

# kamailio -v
version: kamailio 5.1.4 (x86_64/linux)
flags: STATS: Off, USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MEM, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS=1024, MAX_RECV_BUFFER_SIZE 262144, MAX_LISTEN 16, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: unknown
compiled with gcc 6.3.0

• Operating System:

OS: Debian stretch 9.4

Kernel: Linux kamailio 4.9.0-6-amd64 #1 SMP Debian 4.9.88-1+deb9u1 (2018-05-07) x86_64 GNU/Linux

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