<html>

  <head>

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

  </head>

  <body>

    <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">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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