<html>

  <head>

    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

  </head>

  <body>

    <p>In a case, if someone will find this topic via search</p>

    <p>is_first_hop() according to documentation is working only with IP

      addresses in a case of replies. So, it's fully correct behavior. <br>

    </p>

    <p>My bad.<br>

    </p>

    <pre class="moz-signature" cols="72">Regards,

Igor</pre>

    <div class="moz-cite-prefix">On 10.05.2021 08:55, Igor Olhovskiy

      wrote:<br>

    </div>

    <blockquote type="cite"

      cite="mid:62960dee-693f-1928-7d3c-90b331a0447b@gmail.com">

      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

      <p>Sergiu,</p>

      <p>Actually, yes</p>

      <p>Problem is in order of checking in this function</p>

      <p><a class="moz-txt-link-freetext"

href="https://github.com/kamailio/kamailio/blob/02240711239149e2f5c4890a70ab158d10fa8187/src/modules/siputils/sipops.c#L183"

          moz-do-not-send="true">https://github.com/kamailio/kamailio/blob/02240711239149e2f5c4890a70ab158d10fa8187/src/modules/siputils/sipops.c#L183</a><br>

      </p>

      <p><font face="Courier New, Courier, monospace">        if (((ip =

          str2ip(&(puri.host))) == NULL)<br>

                          && ((ip = str2ip6(&(puri.host)))

          == NULL)) {<br>

                      LM_DBG("uri host is not an ip address\n");<br>

                      return -1;<br>

                  }</font></p>

      <p>So, it's checking if Record-Route is an IP address before

        actually calling <b><font face="Courier New, Courier,

            monospace">check_self()</font></b> function. I'll add an

        issue.<br>

      </p>

      <pre class="moz-signature" cols="72">Regards,

Igor</pre>

      <div class="moz-cite-prefix">On 08.05.2021 02:42, Sergiu Pojoga

        wrote:<br>

      </div>

      <blockquote type="cite"

cite="mid:CAJZsGCmcJDHzqryLict3NxaKWg5MOMOjNMofvcFAw_gwQXdXfQ@mail.gmail.com">

        <meta http-equiv="content-type" content="text/html;

          charset=UTF-8">

        <div dir="ltr">May be related to a previous topic about

          is_first_hop() and 'myself'<br>

          <br>

          <a

href="https://lists.kamailio.org/pipermail/sr-users/2018-October/103261.html"

            moz-do-not-send="true">https://lists.kamailio.org/pipermail/sr-users/2018-October/103261.html</a><br>

        </div>

        <br>

        <div class="gmail_quote">

          <div dir="ltr" class="gmail_attr">On Fri, May 7, 2021 at 7:22

            PM David Villasmil <<a

              href="mailto:david.villasmil.work@gmail.com"

              moz-do-not-send="true">david.villasmil.work@gmail.com</a>>

            wrote:<br>

          </div>

          <blockquote class="gmail_quote" style="margin:0px 0px 0px

            0.8ex;border-left:1px solid

            rgb(204,204,204);padding-left:1ex">

            <div><br>

            </div>

            <div dir="auto">Can you share a trace?</div>

            <div dir="auto"><br>

              <div class="gmail_quote" dir="auto">

                <div dir="ltr" class="gmail_attr">On Fri, 7 May 2021 at

                  21:12, Igor Olhovskiy <<a

                    href="mailto:igorolhovskiy@gmail.com"

                    target="_blank" moz-do-not-send="true">igorolhovskiy@gmail.com</a>>

                  wrote:<br>

                </div>

                <blockquote class="gmail_quote" style="margin:0px 0px

                  0px 0.8ex;border-left:1px solid

                  rgb(204,204,204);padding-left:1ex">

                  <div>

                    <p>Yes. It passes<font

                        style="font-family:"Courier

                        New",Courier,monospace;color:rgb(0,0,0)"

                        face="Courier New, Courier, monospace"> uri ==

                        myself</font> condition on auth.<br>

                    </p>

                    <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                  </div>

                  <div>

                    <div>On 07.05.2021 17:32, David Villasmil wrote:<br>

                    </div>

                    <blockquote type="cite">

                      <div dir="ltr">Have you tried verifying Kamailio

                        actually believes the FQDN is itself?

                        <div>

                          <div><br clear="all">

                            <div>

                              <div dir="ltr">

                                <div dir="ltr">

                                  <div>Regards,</div>

                                  <div><br>

                                  </div>

                                  David Villasmil

                                  <div>email: <a

                                      href="mailto:david.villasmil.work@gmail.com"

                                      target="_blank"

                                      moz-do-not-send="true">david.villasmil.work@gmail.com</a></div>

                                  <div>phone: +34669448337</div>

                                </div>

                              </div>

                            </div>

                            <br>

                          </div>

                        </div>

                      </div>

                      <br>

                      <div class="gmail_quote">

                        <div dir="ltr" class="gmail_attr">On Fri, May 7,

                          2021 at 4:18 PM Igor Olhovskiy <<a

                            href="mailto:igorolhovskiy@gmail.com"

                            target="_blank" moz-do-not-send="true">igorolhovskiy@gmail.com</a>>

                          wrote:<br>

                        </div>

                        <blockquote class="gmail_quote"

                          style="margin:0px 0px 0px

                          0.8ex;border-left:1px solid

                          rgb(204,204,204);padding-left:1ex">

                          <div>

                            <p>David,</p>

                            <p>Yes, I did added it, means it was there,

                              but is_first_hop() was blocking adding it.

                              I think it's some leftovers from default

                              config.</p>

                            <p>So, my conclusion, that is_first_hop() is

                              ok with IP addresses, but not ok with FQDN

                              in route. Although FQDN is added as alias<br>

                            </p>

                            <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                            <div>On 07.05.2021 16:07, David Villasmil

                              wrote:<br>

                            </div>

                            <blockquote type="cite">

                              <div dir="auto">Did you add the

                                handle_ruri_alias() as suggested by

                                Daniel? I had something like this where

                                I would get “unable to resolve blah blah

                                blah" and it’s because the RURI is the

                                actual wss “address” which is

                                unresolvable, so executing the function

                                forces kamailio to take the alias

                                instead.</div>

                              <div dir="auto"><br>

                              </div>

                              <div><br>

                                <div class="gmail_quote">

                                  <div dir="ltr" class="gmail_attr">On

                                    Fri, 7 May 2021 at 13:48, Igor

                                    Olhovskiy <<a

                                      href="mailto:igorolhovskiy@gmail.com"

                                      target="_blank"

                                      moz-do-not-send="true">igorolhovskiy@gmail.com</a>>

                                    wrote:<br>

                                  </div>

                                  <blockquote class="gmail_quote"

                                    style="margin:0px 0px 0px

                                    0.8ex;border-left:1px solid

                                    rgb(204,204,204);padding-left:1ex">

                                    <div>

                                      <p>Daniel,</p>

                                      <p>Seems to be it's really the

                                        case, but with other function</p>

                                      <p>With FQDN in RR <br>

                                      </p>

                                      <h3> <code

                                          style="font-family:monospace">is_first_hop()</code></h3>

                                      <p>is not acting correctly for

                                        reply. <br>

                                      </p>

                                      <p> </p>

                                      <blockquote type="cite">For

                                        incoming SIP replies, it means

                                        that top Record-Route URI is

                                        'myself' and source address is

                                        not matching it</blockquote>

                                      But in Record-Route we have

                                      "myself", but <b>is_first_hop()</b>

                                      returning 0. <br>

                                      <p>Thanks!<br>

                                      </p>

                                      <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                                    </div>

                                    <div>

                                      <div>On 07.05.2021 14:22,

                                        Daniel-Constantin Mierla wrote:<br>

                                      </div>

                                      <blockquote type="cite">

                                        <p>OK, because looping was

                                          something that should not have

                                          happened in this case.</p>

                                        <p>Then the problem is that you

                                          do not do nat-traversal-like

                                          processing for

                                          websocket/webrtc traffic. You

                                          have to use

                                          set_contact_alias() +

                                          handle_ruri_alias() because

                                          the webrtc endpoints do not

                                          set "valid" contact addresses.</p>

                                        <p>Cheers,<br>

                                          Daniel<br>

                                        </p>

                                        <div>On 07.05.21 14:13, Igor

                                          Olhovskiy wrote:<br>

                                        </div>

                                        <blockquote type="cite">

                                          <p>Ah, no, sorry, I was wrong

                                            at this one,</p>

                                          <p>This just is not sent with

                                            "unable to resolve address

                                            toleivu2gdbh.invalid". <br>

                                          </p>

                                          <p>Sorry. Looping were

                                            something else during my

                                            tests, this just with <b>advertise</b>

                                            added<br>

                                          </p>

                                          <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                                          <div>On 07.05.2021 14:02,

                                            Daniel-Constantin Mierla

                                            wrote:<br>

                                          </div>

                                          <blockquote type="cite">

                                            <p>This looks like incoming

                                              ACK, because there is only

                                              one Via header, so it is

                                              not what proxy forwards --

                                              that one is relevant to

                                              see what headers were

                                              consumed and added.</p>

                                            <p>Cheers,<br>

                                              Daniel<br>

                                            </p>

                                            <div>On 07.05.21 13:51, Igor

                                              Olhovskiy wrote:<br>

                                            </div>

                                            <blockquote type="cite">

                                              Sure.

                                              <p><font

                                                  style="font-family:"Courier

New",Courier,monospace;color:rgb(0,0,0)" face="Courier New,

                                                  Courier, monospace">ACK

                                                  <a

                                                    style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true">sip:88290@toleivu2gdbh.invalid;transport=wss</a>

                                                  SIP/2.0<br>

                                                  Via: SIP/2.0/UDP

A_IP_ADDRESS:5060;rport;branch=z9hG4bKPj8d05548a-91ef-4332-8617-32f8eeebf8f2<br>

                                                  From: <a

                                                    style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:88881@A_IP_ADDRESS></a>;tag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d<br>

                                                  To: <a

                                                    style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:88290@KAMAILIO_FQDN></a>;tag=hvra7mj3q0<br>

                                                  Call-ID:

                                                  46f44741-d155-4dd5-8fd8-78e540fc1acb<br>

                                                  CSeq: 18326 ACK<br>

                                                  Route: <a

                                                    style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:KAMAILIO_FQDN;lr;r2=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                  Route: <a

                                                    style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:KAMAILIO_FQDN:8089;transport=ws;lr;r2=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                  Max-Forwards: 70<br>

                                                  User-Agent: Asterisk

                                                  PBX 13.33.0<br>

                                                  Content-Length:  0</font></p>

                                              <p><br>

                                              </p>

                                              <p>By loop I meant,

                                                Kamailio just relaying

                                                it back to self and

                                                discard.<br>

                                              </p>

                                              <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                                              <div>On 07.05.2021 13:48,

                                                Daniel-Constantin Mierla

                                                wrote:<br>

                                              </div>

                                              <blockquote type="cite">

                                                <p>Can you paste the ACK

                                                  that loops, after

                                                  being handled once by

                                                  Kamailio?</p>

                                                <p>Cheers,<br>

                                                  Daniel<br>

                                                </p>

                                                <div>On 07.05.21 13:25,

                                                  Igor Olhovskiy wrote:<br>

                                                </div>

                                                <blockquote type="cite">

                                                  <p>Daniel,</p>

                                                  <p>Yes, it is.</p>

                                                  <p><font

                                                      style="font-family:"Courier

New",Courier,monospace;color:rgb(0,0,0)" face="Courier New,

                                                      Courier,

                                                      monospace">alias=...<br>

                                                    </font></p>

                                                  <p>Also tried with</p>

                                                  <p><font

                                                      style="font-family:"Courier

New",Courier,monospace;color:rgb(0,0,0)" face="Courier New,

                                                      Courier,

                                                      monospace">listen

                                                      = IP advertise

                                                      FQDN</font><br>

                                                  </p>

                                                  <p>same behavior, <font

style="font-family:"Courier

                                                      New",Courier,monospace;color:rgb(0,0,0)"

                                                      face="Courier New,

                                                      Courier,

                                                      monospace">loose_route()</font>

                                                    stops acting

                                                    correctly.<br>

                                                  </p>

                                                  <p>PS: Forgot to add,

                                                    Kamailio 5.4.3 /

                                                    5.4.4<br>

                                                  </p>

                                                  <pre cols="72" style="font-family:monospace">Regards,

Igor</pre>

                                                  <div>On 07.05.2021

                                                    13:21,

                                                    Daniel-Constantin

                                                    Mierla wrote:<br>

                                                  </div>

                                                  <blockquote

                                                    type="cite">

                                                    <p>Hello,</p>

                                                    <p>is the

                                                      KAMAILIO_FQDN set

                                                      as local domain

                                                      for Kamailio (via

                                                      alias parameter or

                                                      domain

                                                      module+register

                                                      myself)?</p>

                                                    <p>Cheers,<br>

                                                      Daniel<br>

                                                    </p>

                                                    <div>On 07.05.21

                                                      11:17, Igor

                                                      Olhovskiy wrote:<br>

                                                    </div>

                                                    <blockquote

                                                      type="cite">

                                                      <p>Hello,</p>

                                                      <p>I saw there are

                                                        some topics on

                                                        this already and

                                                        carefully walked

                                                        through all of

                                                        them, but can't

                                                        solve following

                                                        issue.</p>

                                                      <p>For a reason I

                                                        do need that in

                                                        Record-Route

                                                        header sent to

                                                        endpoint would

                                                        present FQDN. If

                                                        it matters, it's

                                                        UDP/WSS

                                                        conversion done

                                                        on Kamailio.</p>

                                                      <p>So, scheme is

                                                        quite simple<br>

                                                      </p>

                                                      <p>Enpoint A 

                                                        ->UDP->

                                                        Kamailio

                                                        ->WSS->

                                                        Endpoint B (NAT)<br>

                                                      </p>

                                                      <p>Main issue

                                                        here, that if in

                                                        Record-Route

                                                        headers it's

                                                        FQDN, but not IP

                                                        addresses, on a

                                                        new transactions

                                                        with a dialog

                                                        (ACK on 200,

                                                        PRACK, BYE),

                                                        Kamailio<b>

                                                          loose_route()</b>

                                                        function

                                                        resolves address

                                                        of destination

                                                        not current

                                                        dialog, but

                                                        actual R-URI (or

                                                        itself, if R-URI

                                                        is something

                                                        from WebRTC

                                                        world) that is

                                                        not correct due

                                                        to NAT.<br>

                                                      </p>

                                                      <p>If in RR

                                                        headers IP

                                                        addresses are

                                                        present - all is

                                                        working as

                                                        expected.</p>

                                                      <p>As an example

                                                        (RR with FQDN)<br>

                                                      </p>

                                                      <p>B answers 200</p>

                                                      <p><font

                                                          style="font-family:"Courier

New",Courier,monospace;color:rgb(0,0,0)" face="Courier New,

                                                          Courier,

                                                          monospace">SIP/2.0

                                                          200 OK<br>

                                                          Record-Route:

                                                          <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:KAMAILIO_FQDN:8089;transport=ws;r2=on;lr=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                          Record-Route:

                                                          <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:KAMAILIO_FQDN;r2=on;lr=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                          Via:

                                                          SIP/2.0/UDP

<A_IP_ADDRESS>:5060;received=A IP

ADDRESS;rport=5060;branch=z9hG4bKPj67fb6d86-97d7-4231-995b-e54b0f62881e<br>

                                                          To: <<a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true">sip:88290@</a><KAMAILIO_FQDN>>;tag=hvra7mj3q0<br>

                                                          From: <<a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true">sip:+XXXX7688881@</a><KAMAILIO_FQDN>>;tag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d<br>

                                                          Call-ID:

                                                          46f44741-d155-4dd5-8fd8-78e540fc1acb<br>

                                                          CSeq: 18326

                                                          INVITE<br>

                                                          Contact: <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:88290@toleivu2gdbh.invalid;transport=wss></a><br>

                                                          Allow:

                                                          ACK,CANCEL,INVITE,MESSAGE,BYE,OPTIONS,INFO,NOTIFY,REFER<br>

                                                          Supported:

                                                          outbound<br>

                                                          Content-Type:

application/sdp<br>

Content-Length: 817</font></p>

                                                      <p><br>

                                                      </p>

                                                      <p>ACK looks like</p>

                                                      <p><font

                                                          style="font-family:"Courier

New",Courier,monospace;color:rgb(0,0,0)" face="Courier New,

                                                          Courier,

                                                          monospace">ACK

                                                          <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true">sip:88290@toleivu2gdbh.invalid;transport=wss</a>

                                                          SIP/2.0<br>

                                                          Via:

                                                          SIP/2.0/UDP

A_IP_ADDRESS:5060;rport;branch=z9hG4bKPj8d05548a-91ef-4332-8617-32f8eeebf8f2<br>

                                                          From: <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:88881@A_IP_ADDRESS></a>;tag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d<br>

                                                          To: <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:88290@KAMAILIO_FQDN></a>;tag=hvra7mj3q0<br>

                                                          Call-ID:

                                                          46f44741-d155-4dd5-8fd8-78e540fc1acb<br>

                                                          CSeq: 18326

                                                          ACK<br>

                                                          Route: <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:FQDN;lr;r2=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                          Route: <a

                                                          style="font-family:"Courier

New",Courier,monospace" moz-do-not-send="true"><sip:FQDN:8089;transport=ws;lr;r2=on;ftag=0a3e31a6-96ad-42d0-9310-81b35cedbd3d;nat=wss></a><br>

                                                          Max-Forwards:

                                                          70<br>

                                                          User-Agent:

                                                          Asterisk PBX

                                                          13.33.0<br>

Content-Length:  0</font><br>

                                                      </p>

                                                      <p>And Kamailio on

                                                        <b>loose_route()</b>

                                                        loops ACK to

                                                        itself. (with

                                                        result of

                                                        function == 1)<br>

                                                      </p>

                                                      <p>In a case if in

Record-Route/Route headers just IP address of Kamailio present, all

                                                        works as

                                                        expected, but

                                                        it's not really

                                                        behavior I want

                                                        to achieve.</p>

                                                      <p>I've tried to

                                                        play with <b>record_route_preset("...")</b>

                                                        specifying only

                                                        WSS part (as

                                                        suggested in <a

href="https://skalatan.de/de/blog/kamailio-sbc-teams" target="_blank"

                                                          moz-do-not-send="true">https://skalatan.de/de/blog/kamailio-sbc-teams</a>)

                                                        with FQDN, but

                                                        no luck.</p>

                                                      <p>Also wanted to

                                                        try approach

                                                        using

record_route_preset() function in branch route, but it was working only

                                                        with first

                                                        branch, not

                                                        affecting others

                                                        (but I assume

                                                        having different

                                                        RR headers

                                                        across branches

                                                        is not a good

                                                        idea)</p>

                                                      <pre cols="72" style="font-family:monospace">-- 

Regards,

Igor</pre>

                                                      <br>

                                                      <fieldset></fieldset>

                                                      <pre style="font-family:monospace">__________________________________________________________

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