Hi Daniel,<div><br></div><div>Thanks for looking into that for me and yes I see the problem now. We&#39;ll have to get our software fixed to support loose routing.</div><div>Is there a way to do this without using loose routing, for example building two completely separate SIP dialogs with the proxy in the middle?</div>
<div><br></div><div>Cheers,</div><div>Richard<br><br><div class="gmail_quote">On 9 April 2012 11:17, Daniel-Constantin Mierla <span dir="ltr">&lt;<a href="mailto:miconda@gmail.com">miconda@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div bgcolor="#FFFFFF" text="#000000">
    Hello,<br>
    <br>
    the r-uri in the bad ACK is pointing to the proxy, as I understood
    from the headers. It should point to callee IP address.<br>
    <br>
    Look at he 200ok for INVITE to see the Contact address -- some
    device involved in the call does not implement properly loose
    routing or the contact address is improperly updated somewhere.<br>
    <br>
    Cheers,<br>
    Daniel<div><div class="h5"><br>
    <br>
    On 4/6/12 5:16 PM, SIP Mailing-list wrote:
    </div></div><blockquote type="cite"><div><div class="h5">Hi guys,
      <div><br>
      </div>
      <div>Hope someone can help me with this.</div>
      <div><br>
      </div>
      <div>The background: I&#39;m just trying to implement a simple load
        balancer with one source and multiple destinations using the
        call load balancer (ALG10) in dispatcher. kamailio version 3.2.0</div>
      <div>The symptoms: I have a simple script working in one test
        environment (csipsimple -&gt; kamailaio -&gt; Twinkle) but can&#39;t
        get it to work in another (Dialogic HMP 3.0 -&gt; kamailio -&gt;
        Dialogic HMP 3.0)</div>
      <div>
        The details: I&#39;ve done a debug trace (below) in both
        environments and can&#39;t see the problem. For some reason the ACK
        is destroyed before it is forwarded even though the log says
        &quot;[forward.c:601]: Sending:#012ACK...&quot;</div>
      <div><br>
      </div>
      <div>Any help would be much appreciated!</div>
      <div><br>
      </div>
      <div>TIA,</div>
      <div>Richard</div>
      <div><br>
      </div>
      <div>kamailio.cfg:</div>
      <div>...</div>
      <div>
        <div>#!KAMAILIO</div>
        <div>#</div>
        <div># Kamailio (OpenSER) SIP Server v3.2 - default
          configuration script</div>
        <div>#     - web: <a href="http://www.kamailio.org" target="_blank">http://www.kamailio.org</a></div>
        <div>#     - git: <a href="http://sip-router.org" target="_blank">http://sip-router.org</a></div>
        <div>#</div>
        <div># Direct your questions about this file to: &lt;<a href="mailto:sr-users@lists.sip-router.org" target="_blank">sr-users@lists.sip-router.org</a>&gt;</div>
        <div>#</div>
        <div># Refer to the Core CookBook at <a href="http://www.kamailio.org/dokuwiki/doku.php" target="_blank">http://www.kamailio.org/dokuwiki/doku.php</a></div>
        <div># for an explanation of possible statements, functions and
          parameters.</div>
        <div>#</div>
        <div># </div>
        <div># Several features can be enabled using &#39;#!define
          WITH_FEATURE&#39; directives:</div>
        <div>#</div>
        <div># RAC: Uses dispatcher algorithm 10 to keep track of load
          distribution</div>
        <div>#</div>
        <div># Use: kamctl start/stop/restart</div>
        <div><br>
        </div>
        <div>####### Global Parameters #########</div>
        <div><br>
        </div>
        <div># Output goes to /var/log/syslog</div>
        <div># 5 gives too much output</div>
        <div># 3 is DEBUG, even this can go crazy</div>
        <div># 2 is INFO</div>
        <div># 1 is NOTICE</div>
        <div>debug=3</div>
        <div>#log_stderror=yes</div>
        <div><br>
        </div>
        <div>memdbg=5</div>
        <div>memlog=5</div>
        <div>mem_summary=2</div>
        <div><br>
        </div>
        <div>log_facility=LOG_LOCAL0</div>
        <div>
          <br>
        </div>
        <div>fork=yes</div>
        <div>children=4</div>
        <div><br>
        </div>
        <div>/* uncomment the next line to disable TCP (default on) */</div>
        <div>disable_tcp=yes</div>
        <div><br>
        </div>
        <div>/* uncomment the next line to disable the auto discovery of
          local aliases</div>
        <div>   based on reverse DNS on IPs (default on) */</div>
        <div>auto_aliases=no</div>
        <div><br>
        </div>
        <div>/* add local domain aliases */</div>
        <div>alias=<a href="http://10.130.11.121:5060" target="_blank">10.130.11.121:5060</a></div>
        <div><br>
        </div>
        <div>/* uncomment and configure the following line if you want
          Kamailio to </div>
        <div>   bind on a specific interface/port/proto (default bind on
          all available) */</div>
        <div>listen=udp:<a href="http://10.130.11.121:5060" target="_blank">10.130.11.121:5060</a></div>
        <div><br>
        </div>
        <div>/* port to listen to</div>
        <div> * - can be specified more than once if needed to listen on
          many ports */</div>
        <div>#port=5062</div>
        <div><br>
        </div>
        <div># life time of TCP connection when there is no traffic</div>
        <div># - a bit higher than registration expires to cope with UA
          behind NAT</div>
        <div>tcp_connection_lifetime=3605</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>####### Modules Section ########</div>
        <div><br>
        </div>
        <div># set paths to location of modules (to sources or
          installation folders)</div>
        <div>#!ifdef WITH_SRCPATH</div>
        <div>mpath=&quot;modules_k:modules&quot;</div>
        <div>#!else</div>
        <div>mpath=&quot;/usr/lib/kamailio/modules_k/:/usr/lib/kamailio/modules/&quot;</div>
        <div>#!endif</div>
        <div><br>
        </div>
        <div># For the kamctl interface</div>
        <div>loadmodule &quot;mi_fifo.so&quot;</div>
        <div>#loadmodule &quot;kex.so&quot;</div>
        <div># TM module is required for t_relay()</div>
        <div>loadmodule &quot;tm.so&quot;</div>
        <div>#loadmodule &quot;tmx.so&quot;</div>
        <div>loadmodule &quot;sl.so&quot;</div>
        <div># RR module is required for loose_route() and
          record_route()</div>
        <div>loadmodule &quot;rr.so&quot;</div>
        <div># PV is required for avp&#39;s for ALG10</div>
        <div>loadmodule &quot;pv.so&quot;</div>
        <div># Used for mf_process_maxfwd_header()</div>
        <div>loadmodule &quot;maxfwd.so&quot;</div>
        <div>#loadmodule &quot;usrloc.so&quot;</div>
        <div>#loadmodule &quot;registrar.so&quot;</div>
        <div># textops is required for is_method()</div>
        <div>loadmodule &quot;textops.so&quot;</div>
        <div># For has_totag()</div>
        <div>loadmodule &quot;siputils.so&quot;</div>
        <div># xlog is required for user xlog() formatted messages.
          Output goes to /var/log/messages</div>
        <div>loadmodule &quot;xlog.so&quot;</div>
        <div># For sanity_check()</div>
        <div>loadmodule &quot;sanity.so&quot;</div>
        <div>#loadmodule &quot;ctl.so&quot;</div>
        <div>#loadmodule &quot;cfg_rpc.so&quot;</div>
        <div>#loadmodule &quot;mi_rpc.so&quot;</div>
        <div>#loadmodule &quot;acc.so&quot;</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div># Added by RAC 2012-04-04: required for ds_select_dst() etc</div>
        <div>loadmodule &quot;dispatcher.so&quot;</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div># ----------------- setting module-specific parameters
          ---------------</div>
        <div><br>
        </div>
        <div># ----- mi_fifo params -----</div>
        <div>modparam(&quot;mi_fifo&quot;, &quot;fifo_name&quot;, &quot;/tmp/kamailio_fifo&quot;)</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div># Added by RAC 2012-04-04</div>
        <div># ----- dispatcher params -----</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;list_file&quot;,  
           &quot;/etc/kamailio/dispatcher.list&quot;)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;force_dst&quot;, 0)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;use_default&quot;, 1)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_ping_method&quot;, &quot;OPTIONS&quot;)</div>
        <div># Only set ping reply codes that are acceptable. CE should
          only reply &quot;200OK&quot; if OK, &quot;486 Busy Here&quot; if not</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_ping_reply_codes&quot;, &quot;class=2&quot;)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_ping_from&quot;, &quot;<a href="mailto:sip%3Aproxy@10.130.11.121" target="_blank">sip:proxy@10.130.11.121</a>&quot;)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_ping_interval&quot;, 20)</div>
        <div># In this mode only inactive destinations marked as
          probe-able will be pinged</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_probing_mode&quot;, 2)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_probing_threshhold&quot;, 1)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_hash_expire&quot;, 3600)</div>
        <div># Flag &quot;2&quot; MUST be set to use the AVPs listed below. If not
          set these will be &lt;null&gt;</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;flags&quot;,     2)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;dst_avp&quot;,    &quot;$avp(dsdst)&quot;)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;grp_avp&quot;,    &quot;$avp(dsgrp)&quot;)</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;cnt_avp&quot;,    &quot;$avp(dscnt)&quot;)</div>
        <div># For algorithm 10, call load distribution duid (in
          list_file), dstid_avp and ds_hash_size are required</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;dstid_avp&quot;,    &quot;$avp(dsdstid)&quot;)</div>
        <div># Appears to be the size (2^ds_hash_size) of a hashtable
          for storing the state of individual sessions</div>
        <div># Presumably needs to be bigger than the number of
          concurrent sessions expected</div>
        <div># 2^12 = 4096</div>
        <div>modparam(&quot;dispatcher&quot;, &quot;ds_hash_size&quot;, 12)</div>
        <div><br>
        </div>
        <div>####### Routing Logic ########</div>
        <div><br>
        </div>
        <div># ds_load_update():</div>
        <div>#  if it is a BYE or CANCEL - remove the load from
          destination address used to forward the INVITE</div>
        <div>#  if it is a reply to INVITE - set internal state to
          confirmed for call load structure when reply code is 2xx.</div>
        <div>#</div>
        <div># ds_load_unset(): Remove the call load for the destination
          that routed the call. </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div># Main SIP request routing logic</div>
        <div># - processing of any incoming SIP request starts with this
          route</div>
        <div># - note: this is the same as route { ... }</div>
        <div>
          request_route {</div>
        <div><br>
        </div>
        <div>    if (!mf_process_maxfwd_header(&quot;10&quot;)) {</div>
        <div>        sl_send_reply(&quot;483&quot;,&quot;Too Many Hops&quot;);</div>
        <div>        exit;</div>
        <div>    }</div>
        <div><br>
        </div>
        <div>    if(!sanity_check(&quot;1511&quot;, &quot;7&quot;)) {</div>
        <div>        xlog(&quot;Malformed SIP message from $si:$sp\n&quot;);</div>
        <div>        exit;</div>
        <div>    }</div>
        <div><br>
        </div>
        <div>    # Added by RAC 2012-04-04</div>
        <div>    # Do not run ds_load_update() here; the reply to the
          orginal invite is sufficient to release the load</div>
        <div>    # loose_route() performs routing of in-dialog requests</div>
        <div>    if(has_totag()) {</div>
        <div>
                  if (loose_route()) {</div>
        <div>            # t_relay() relays a message statefully;
          forward() (stateless) easily gets in a muddle</div>
        <div>            if(!t_relay()) {</div>
        <div>                if (method == &quot;ACK&quot;) xlog(&quot;L_ERR&quot;, <a>&quot;cid:$ci
          [$rm] [200-OK] t_relay failed\n&quot;</a>);</div>
        <div>                else xlog(&quot;L_WARN&quot;, <a>&quot;cid:$ci Existing
          Transaction relay failed: [$rm] from($ft) [$fu] to($tt)
          [$tu]\n&quot;</a>);</div>
        <div>                sl_reply_error();</div>
        <div>            }</div>
        <div>
                      else xlog(&quot;L_INFO&quot;, <a>&quot;cid:$ci Existing Transaction:
          [$rm] from($ft) [$fu] to($tt) [$tu]\n&quot;</a>);</div>
        <div>        } else if (method == &quot;ACK&quot;) {</div>
        <div>            if (t_check_trans()) {</div>
        <div>                # stateful ACK after 487 or 404</div>
        <div>                t_relay();</div>
        <div>            } else {</div>
        <div>                # ACK without transaction, ignore and
          discard</div>
        <div>                xlog(&quot;L_WARN&quot;, <a>&quot;cid:$ci Dropping ACK:
          from($ft) [$fu] to($tt) [$tu]\n&quot;</a>);</div>
        <div>            }</div>
        <div>        } else {</div>
        <div>            sl_send_reply(&quot;404&quot;,&quot;Not here&quot;);</div>
        <div>        }</div>
        <div>        exit;</div>
        <div>    } # has_totag()</div>
        <div><br>
        </div>
        <div>    # dest set1, ALG10: call load distribution: least
          number of calls receives the next call</div>
        <div>    # Keeps a hash table of calls based on Call-ID to track
          call load per destination</div>
        <div>    if(ds_select_dst(&quot;1&quot;, &quot;10&quot;))</div>
        <div>        xlog(&quot;L_NOTICE&quot;, <a>&quot;cid:$ci Destination Selected:
          [$rm] from($ft) [$fu] routed to [sip:$tU@$dd:$dp]
          ($avp(dsdstid))\n&quot;</a>);</div>
        <div>    else {</div>
        <div>        xlog(&quot;L_ERR&quot;, &quot;No destinations available: [$rm]
          from [$fu]\n&quot;);</div>
        <div>        sl_send_reply(&quot;500&quot;,&quot;No destinations available&quot;);</div>
        <div> <span style="white-space:pre-wrap"> </span>
             drop();</div>
        <div>        exit();</div>
        <div>    }</div>
        <div>    # record_route() causes ALL messages to go through the
          proxy including ACKs and BYEs. Results in 16 SIP packets</div>
        <div>    # Without record_route(), after 200OK, the ACK and BYE
          is sent direct. Results in 11 SIP packets</div>
        <div>    # Must use record_route() with call load distribution,
          otherwise we will not know when a call is released</div>
        <div>    #  and cannot account for it</div>
        <div>    record_route();</div>
        <div>    # With t_relay(), the proxy creates its own messages
          like 100 trying, instead of forwarding the original</div>
        <div>    # forward() is not recommended</div>
        <div>    t_relay();</div>
        <div><br>
        </div>
        <div>}</div>
        <div><br>
        </div>
        <div>event_route[dispatcher:dst-down] {</div>
        <div>    xlog(&quot;L_ERR&quot;, &quot;Destination down: [$rm] $ru ($du)\n&quot;);</div>
        <div>}</div>
        <div><br>
        </div>
        <div>event_route[dispatcher:dst-up] {</div>
        <div>    xlog(&quot;L_NOTICE&quot;, &quot;Destination up: [$rm] $ru\n&quot;);</div>
        <div>}</div>
        <div><br>
        </div>
        <div># Added by RAC 2012-04-04: Update call loads on replies for
          ALG10.</div>
        <div># Default action is to reply upstream statelessly using Via
          headers</div>
        <div>onreply_route {</div>
        <div>    xlog(&quot;L_INFO&quot;, <a>&quot;cid:$ci Reply: [$rm] [$rs-$rr]
          from($ft) [$fu] to($tt) [$tu]\n&quot;</a>);</div>
        <div>
              if(is_method(&quot;INVITE&quot;)) {</div>
        <div>        if(status=~&quot;2[0-9][0-9]&quot;)</div>
        <div>            ds_load_update();</div>
        <div>        else if(status=~&quot;[3-7][0-9][0-9]&quot;)</div>
        <div>            ds_load_unset();</div>
        <div>    }</div>
        <div>    else if(is_method(&quot;BYE&quot;)) {</div>
        <div>        ds_load_update();</div>
        <div>    }</div>
        <div>}</div>
      </div>
      <div>...</div>
      <div><br>
      </div>
      <div>
        <div>Bad debug trace (CE to IVRSim):</div>
        <div>NOTE: Phone numbers have been changed</div>
        <div>...</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:628]: SIP Request:</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:630]:  method:
           &lt;ACK&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:632]:  uri:     &lt;<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>&gt;</div>
        <div>
          Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:634]:  version:
          &lt;SIP/2.0&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:174]: DEBUG: add_param:
          tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:803]: end of header
          reached, state=29</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:187]: DEBUG:
          get_hdr_field: &lt;To&gt; [81]; uri=[<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>] </div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:189]: DEBUG: to body
          [&lt;<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>&gt;]</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:167]: get_hdr_field:
          cseq &lt;CSeq&gt;: &lt;1&gt; &lt;ACK&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:1288]: Found param
          type 232, &lt;branch&gt; =
          &lt;z9hG4bK-182890-5e5e75ec-235d6d1e&gt;; state=16</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:2563]: end of header
          reached, state=5</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:515]: parse_headers:
          Via found, flags=2</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:517]: parse_headers:
          this is the first via</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [receive.c:146]: After parse_msg...</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [receive.c:187]: preparing to run routing
          scripts...</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: sl [sl_funcs.c:307]: DEBUG : sl_filter_ACK: to late to
          be a local ACK!</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: maxfwd [mf_funcs.c:85]: value = 70 </div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:201]: DEBUG:
          get_hdr_body : content_length=0</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:103]: found end of
          header</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:174]: DEBUG: add_param:
          tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:803]: end of header
          reached, state=29</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: sanity [mod_sanity.c:251]: sanity checks result: 1</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: siputils [checks.c:107]: totag found</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: rr [loose.c:85]: is_preloaded: No</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [socket_info.c:502]: grep_sock_info -
          checking if host==us: 13==13 &amp;&amp;  [10.130.11.121] ==
          [10.130.11.121]</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [socket_info.c:505]: grep_sock_info -
          checking if port 5060 matches port 5060</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: rr [loose.c:594]: Next hop:
          &#39;<a>sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</a>&#39;
          is loose router</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: rr [loose.c:644]: The last route URI:
&#39;<a>sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</a>&#39;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: tm [t_lookup.c:1379]: DEBUG: t_newtran: msg id=6 ,
          global msg id=5 , T on entrance=(nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: tm [t_lookup.c:527]: t_lookup_request: start searching:
          hash=37904, isACK=1</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: tm [t_lookup.c:485]: DEBUG: RFC3261 transaction
          matching failed</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: tm [t_lookup.c:709]: DEBUG: t_lookup_request: no
          transaction found</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: tm [t_funcs.c:315]: SER: forwarding ACK  statelessly </div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [msg_translator.c:204]:
          check_via_address(10.130.11.101, 10.130.11.101, 0)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [forward.c:601]: Sending:#012ACK
          <a>sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</a>
          SIP/2.0#015#012From: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;;tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890#015#012To:
          &lt;<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>&gt;;tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4#015#012Call-ID:
          fb041312-da6d-4fb7-bfee-32677fbab37b#015#012CSeq: 1
          ACK#015#012Via: SIP/2.0/UDP
          10.130.11.121;branch=z9hG4bKcydzigwkX#015#012Via: SIP/2.0/UDP
          10.130.11.101:5060;branch=z9hG4bK-182890-5e5e75ec-235d6d1e#015#012Max-Forwards:
          69#015#012Contact: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;#015#012Allow-Events:
          refer#015#012Content-Length: 0#015#012#015#012.</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [forward.c:603]: orig. len=550,
          new_len=566, proto=1</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:628]: SIP Request:</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:630]:  method:
           &lt;ACK&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:632]:  uri:    
<a>&lt;sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890&gt;</a></div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:634]:  version:
          &lt;SIP/2.0&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:174]: DEBUG: add_param:
          tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:803]: end of header
          reached, state=29</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [xavp.c:365]: destroying xavp list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:187]: DEBUG:
          get_hdr_field: &lt;To&gt; [81]; uri=[<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>] </div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28277]:
          DEBUG: &lt;core&gt; [receive.c:290]: receive_msg: cleaning up</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:189]: DEBUG: to body
          [&lt;<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>&gt;]</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:167]: get_hdr_field:
          cseq &lt;CSeq&gt;: &lt;1&gt; &lt;ACK&gt;</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:1288]: Found param
          type 232, &lt;branch&gt; = &lt;z9hG4bKcydzigwkX&gt;; state=16</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:2563]: end of header
          reached, state=5</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:515]: parse_headers:
          Via found, flags=2</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:517]: parse_headers:
          this is the first via</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [receive.c:146]: After parse_msg...</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [receive.c:187]: preparing to run routing
          scripts...</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: sl [sl_funcs.c:307]: DEBUG : sl_filter_ACK: to late to
          be a local ACK!</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:1288]: Found param
          type 232, &lt;branch&gt; =
          &lt;z9hG4bK-182890-5e5e75ec-235d6d1e&gt;; state=16</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_via.c:2563]: end of header
          reached, state=5</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:515]: parse_headers:
          Via found, flags=100</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:528]: parse_headers:
          this is the second via</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: maxfwd [mf_funcs.c:85]: value = 69 </div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:201]: DEBUG:
          get_hdr_body : content_length=0</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/msg_parser.c:103]: found end of
          header</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:174]: DEBUG: add_param:
          tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [parser/parse_to.c:803]: end of header
          reached, state=29</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: sanity [mod_sanity.c:251]: sanity checks result: 1</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: siputils [checks.c:107]: totag found</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: rr [loose.c:108]: No Route headers found</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: rr [loose.c:838]: There is no Route HF</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: tm [t_lookup.c:1079]: DEBUG: t_check_msg: msg id=6
          global id=5 T start=(nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: tm [t_lookup.c:527]: t_lookup_request: start searching:
          hash=37904, isACK=1</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: tm [t_lookup.c:485]: DEBUG: RFC3261 transaction
          matching failed</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: tm [t_lookup.c:709]: DEBUG: t_lookup_request: no
          transaction found</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: tm [t_lookup.c:1148]: DEBUG: t_check_msg: msg id=6
          global id=6 T end=(nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          WARNING: &lt;script&gt;:
          <a>cid:fb041312-da6d-4fb7-bfee-32677fbab37b</a> Dropping ACK:
          from(774ee38-650b820a-13c4-50022-182890-4de156df-182890) [<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>]
          to(f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4) [<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>]</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          last message repeated 5 times</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [xavp.c:365]: destroying xavp list (nil)</div>
        <div>Apr  6 14:10:29 UKCY-VM-LINUX199 /usr/sbin/kamailio[28276]:
          DEBUG: &lt;core&gt; [receive.c:290]: receive_msg: cleaning up</div>
        <div>...</div>
        <div><br>
        </div>
        <div>Bad SIP ACK:</div>
        <div>...</div>
        <div>Session Initiation Protocol</div>
        <div>    Request-Line: ACK <a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>
          SIP/2.0</div>
        <div>        Method: ACK</div>
        <div>        Request-URI: <a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a></div>
        <div>            Request-URI User Part: 18000005835</div>
        <div>            Request-URI Host Part: 10.130.11.121</div>
        <div>        [Resent Packet: False]</div>
        <div>        [Request Frame: 7]</div>
        <div>        [Response Time (ms): 29]</div>
        <div>    Message Header</div>
        <div>        From: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;;tag=774ee38-650b820a-13c4-50022-182890-4de156df-182890</div>
        <div>            SIP from address: <a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a></div>
        <div>                SIP from address User Part: 441865000101</div>
        <div>                SIP from address Host Part: 10.130.11.101</div>
        <div>            SIP tag:
          774ee38-650b820a-13c4-50022-182890-4de156df-182890</div>
        <div>        To: &lt;<a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a>&gt;;tag=f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4</div>
        <div>            SIP to address: <a href="mailto:sip%3A18000005835@10.130.11.121" target="_blank">sip:18000005835@10.130.11.121</a></div>
        <div>                SIP to address User Part: 18000005835</div>
        <div>                SIP to address Host Part: 10.130.11.121</div>
        <div>            SIP tag:
          f8a6698-0-13c4-50022-16d0d4-103b30a3-16d0d4</div>
        <div>        Call-ID: fb041312-da6d-4fb7-bfee-32677fbab37b</div>
        <div>        CSeq: 1 ACK</div>
        <div>            Sequence Number: 1</div>
        <div>            Method: ACK</div>
        <div>        Via: SIP/2.0/UDP
          10.130.11.101:5060;branch=z9hG4bK-182890-5e5e75ec-235d6d1e</div>
        <div>            Transport: UDP</div>
        <div>            Sent-by Address: 10.130.11.101</div>
        <div>            Sent-by port: 5060</div>
        <div>            Branch: z9hG4bK-182890-5e5e75ec-235d6d1e</div>
        <div>        Max-Forwards: 70</div>
        <div>        Route:
<a>&lt;sip:10.130.11.121;lr;ftag=774ee38-650b820a-13c4-50022-182890-4de156df-182890&gt;</a></div>
        <div>        Contact: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;</div>
        <div>            Contact Binding: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;</div>
        <div>                URI: &lt;<a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a>&gt;</div>
        <div>                    SIP contact address: <a href="mailto:sip%3A441865000101@10.130.11.101" target="_blank">sip:441865000101@10.130.11.101</a></div>
        <div>        Allow-Events: refer</div>
        <div>        Content-Length: 0</div>
        <div>...</div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div><br>
        </div>
        <div>Good debug trace (Richard laptop, Twinkle local and
          csipsimple on wifi):</div>
        <div>...</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:628]: SIP Request:</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:630]:  method:  &lt;ACK&gt;</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:632]:  uri:     &lt;<a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>;transport=udp&gt;</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:634]:  version:
          &lt;SIP/2.0&gt;</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/parse_via.c:1288]: Found param type 235,
          &lt;rport&gt; = &lt;n/a&gt;; state=6</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/parse_via.c:1288]: Found param type 232,
          &lt;branch&gt; =
          &lt;z9hG4bKPjWvIFG5BzVRtUe1jnpRa1ilioYiezOrTz&gt;; state=16</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/parse_via.c:2563]: end of header reached,
          state=5</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:515]: parse_headers: Via
          found, flags=2</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:517]: parse_headers: this is
          the first via</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [receive.c:146]: After parse_msg...</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [receive.c:187]: preparing to run routing
          scripts...</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          sl [sl_funcs.c:307]: DEBUG : sl_filter_ACK: to late to be a
          local ACK!</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/parse_to.c:174]: DEBUG: add_param:
          tag=ggpxl</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/parse_to.c:803]: end of header reached,
          state=29</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:187]: DEBUG: get_hdr_field:
          &lt;To&gt; [35]; uri=[<a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>] </div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:189]: DEBUG: to body [&lt;<a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>&gt;]</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:167]: get_hdr_field: cseq
          &lt;CSeq&gt;: &lt;10807&gt; &lt;ACK&gt;</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          rr [loose.c:85]: is_preloaded: No</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [socket_info.c:502]: grep_sock_info - checking if
          host==us: 13==13 &amp;&amp;  [192.168.0.104] ==
          [192.168.0.104]</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [socket_info.c:505]: grep_sock_info - checking if
          port 5062 matches port 5060</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [forward.c:448]: check_self: host != me</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [socket_info.c:502]: grep_sock_info - checking if
          host==us: 13==13 &amp;&amp;  [192.168.0.104] ==
          [192.168.0.104]</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [socket_info.c:505]: grep_sock_info - checking if
          port 5062 matches port 5062</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          rr [loose.c:709]: Topmost route URI:
          &#39;<a>sip:192.168.0.104:5062;lr;ftag=gYRr.jGE57ZMeLuxYrVmKDuHlnX964Fa</a>&#39;
          is me</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:201]: DEBUG: get_hdr_body :
          content_length=0</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [parser/msg_parser.c:103]: found end of header</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          rr [loose.c:173]: No next Route HF found</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          rr [loose.c:728]: No next URI found</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          tm [t_lookup.c:1379]: DEBUG: t_newtran: msg id=2 , global msg
          id=1 , T on entrance=0xffffffffffffffff</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          tm [t_lookup.c:527]: t_lookup_request: start searching:
          hash=17962, isACK=1</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          tm [t_lookup.c:485]: DEBUG: RFC3261 transaction matching
          failed</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          tm [t_lookup.c:709]: DEBUG: t_lookup_request: no transaction
          found</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          tm [t_funcs.c:315]: SER: forwarding ACK  statelessly </div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [msg_translator.c:204]:
          check_via_address(192.168.0.3, 192.168.0.3, 0)</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [forward.c:601]: Sending:#012ACK <a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>;transport=udp
          SIP/2.0#015#012Via: SIP/2.0/UDP
          192.168.0.104:5062;branch=z9hG4bKcydzigwkX#015#012Via:
          SIP/2.0/UDP
          192.168.0.3:51351;rport=51351;branch=z9hG4bKPjWvIFG5BzVRtUe1jnpRa1ilioYiezOrTz#015#012Max-Forwards:
          70#015#012From:
          <a>&lt;sip:racitup@mobile&gt;</a>;tag=gYRr.jGE57ZMeLuxYrVmKDuHlnX964Fa#015#012To:
          &lt;<a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>&gt;;tag=ggpxl#015#012Call-ID:
          zH5ub5H6ooVWQmBzZyswgMSLn7rb2xJl#015#012CSeq: 10807
          ACK#015#012Content-Length:  0#015#012#015#012.</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [forward.c:603]: orig. len=418, new_len=411,
          proto=1</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [usr_avp.c:644]: DEBUG:destroy_avp_list:
          destroying list (nil)</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: last
          message repeated 5 times</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [xavp.c:365]: destroying xavp list (nil)</div>
        <div>Apr  6 14:24:30 adventure /usr/sbin/kamailio[8545]: DEBUG:
          &lt;core&gt; [receive.c:290]: receive_msg: cleaning up</div>
        <div>...</div>
        <div><br>
        </div>
        <div>Good ACK:</div>
        <div>...</div>
        <div>Session Initiation Protocol</div>
        <div>    Request-Line: ACK <a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>;transport=udp
          SIP/2.0</div>
        <div>        Method: ACK</div>
        <div>        Request-URI: <a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>;transport=udp</div>
        <div>            Request-URI User Part: 123</div>
        <div>            Request-URI Host Part: 192.168.0.104</div>
        <div>        [Resent Packet: False]</div>
        <div>        [Request Frame: 13]</div>
        <div>        [Response Time (ms): 6489]</div>
        <div>    Message Header</div>
        <div>        Via: SIP/2.0/UDP
          192.168.0.3:38653;rport;branch=z9hG4bKPjyL0GhUP12E0Dkn2CQ5BR9aQm67DdxKfE</div>
        <div>            Transport: UDP</div>
        <div>            Sent-by Address: 192.168.0.3</div>
        <div>            Sent-by port: 38653</div>
        <div>            RPort: rport</div>
        <div>            Branch:
          z9hG4bKPjyL0GhUP12E0Dkn2CQ5BR9aQm67DdxKfE</div>
        <div>        Max-Forwards: 70</div>
        <div>        From:
          <a>&lt;sip:racitup@mobile&gt;</a>;tag=6UtDyO9vBPzP46w7K8AGOfL6qQbFciij</div>
        <div>            SIP from address: <a>sip:racitup@mobile</a></div>
        <div>                SIP from address User Part: racitup</div>
        <div>                SIP from address Host Part: mobile</div>
        <div>            SIP tag: 6UtDyO9vBPzP46w7K8AGOfL6qQbFciij</div>
        <div>        To: &lt;<a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a>&gt;;tag=lsboj</div>
        <div>            SIP to address: <a href="mailto:sip%3A123@192.168.0.104" target="_blank">sip:123@192.168.0.104</a></div>
        <div>                SIP to address User Part: 123</div>
        <div>                SIP to address Host Part: 192.168.0.104</div>
        <div>            SIP tag: lsboj</div>
        <div>        Call-ID: 1jtxqtjWsDqEL3C2tsrhS3WtRirBFcB7</div>
        <div>        CSeq: 3674 ACK</div>
        <div>            Sequence Number: 3674</div>
        <div>            Method: ACK</div>
        <div>        Route:
          <a>&lt;sip:192.168.0.104:5062;lr;ftag=6UtDyO9vBPzP46w7K8AGOfL6qQbFciij&gt;</a></div>
        <div>        Content-Length:  0</div>
        <div>...</div>
      </div>
      <div><br>
      </div>
      <br>
      <fieldset></fieldset>
      <br>
      </div></div><pre>_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
<a href="mailto:sr-users@lists.sip-router.org" target="_blank">sr-users@lists.sip-router.org</a>
<a href="http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users" target="_blank">http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users</a><span class="HOEnZb"><font color="#888888">
</font></span></pre><span class="HOEnZb"><font color="#888888">
    </font></span></blockquote><span class="HOEnZb"><font color="#888888">
    <br>
    <pre cols="72">-- 
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
<a href="http://www.asipto.com/index.php/kamailio-advanced-training/" target="_blank">http://www.asipto.com/index.php/kamailio-advanced-training/</a></pre>
  </font></span></div>

</blockquote></div><br></div>