Thanks for your suggestions! I guess I have been too much involved in B2BUA that I forgot how a proxy should work. After some digging around in the RFC I fixed my sipp scripts (for reference herunder) Also the SIP trace.

U 10.57.26.219:5060 -> 10.57.26.220:5060
INVITE sip:service@10.57.26.220:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 70.
Subject: Performance Test.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.219.
s=-.
c=IN IP4 10.57.26.219.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.

#
U 10.57.26.220:5060 -> 10.57.26.219:5060
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Server: kamailio (4.2.0 (x86_64/linux)).
Content-Length: 0.
.

#
U 10.57.26.220:5060 -> 10.57.26.239:5060
INVITE sip:service@10.57.26.220:5060 SIP/2.0.
Record-Route: <sip:10.57.26.220;lr>.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKd377.9ceee9cba2a2b30026d549ab64abb1f1.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 69.
Subject: Performance Test.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.219.
s=-.
c=IN IP4 10.57.26.219.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.

#
U 10.57.26.239:5060 -> 10.57.26.220:5060
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKd377.9ceee9cba2a2b30026d549ab64abb1f1.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

#
U 10.57.26.239:5060 -> 10.57.26.220:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKd377.9ceee9cba2a2b30026d549ab64abb1f1.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
Record-Route: <sip:10.57.26.220;lr>.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.

#
U 10.57.26.220:5060 -> 10.57.26.219:5060
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

#
U 10.57.26.220:5060 -> 10.57.26.219:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-0.
Record-Route: <sip:10.57.26.220;lr>.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.

#
U 10.57.26.219:5060 -> 10.57.26.220:5060
ACK sip:service@10.57.26.220:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-5.
Route: <sip:10.57.26.220;lr>.
Route: <sip:10.57.26.239:5060;transport=UDP>.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 ACK.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 70.
Subject: Performance Test.
XContactinOK: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

#
U 10.57.26.220:5060 -> 10.57.26.239:5060
ACK sip:10.57.26.239:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKd377.617ab2682b59d6f46efa48d3f737eb80.0.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKd377.b2a7497aae5192ea12836223b6f311a4.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-5.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 1 ACK.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 68.
Subject: Performance Test.
XContactinOK: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

#
U 10.57.26.219:5060 -> 10.57.26.220:5060
BYE sip:service@10.57.26.220:5060 SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-7.
Route: <sip:10.57.26.220;lr>.
Route: <sip:10.57.26.239:5060;transport=UDP>.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 2 BYE.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 70.
Subject: Performance Test.
Content-Length: 0.
.

#
U 10.57.26.220:5060 -> 10.57.26.239:5060
BYE sip:10.57.26.239:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKa377.b77caac49d952819ae55aa61662a095b.0.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKa377.d1ee5b3c5e388385ec3f050fdd10a7fb.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-7.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 2 BYE.
Contact: sip:sipp@10.57.26.219:5060.
Max-Forwards: 68.
Subject: Performance Test.
Content-Length: 0.
.

#
U 10.57.26.239:5060 -> 10.57.26.220:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKa377.b77caac49d952819ae55aa61662a095b.0, SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKa377.d1ee5b3c5e388385ec3f050fdd10a7fb.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-7.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 2 BYE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

#
U 10.57.26.220:5060 -> 10.57.26.219:5060
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-16174-1-7.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=16174SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=15186SIPpTag015.
Call-ID: 1-16174@10.57.26.219.
CSeq: 2 BYE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.

SIPP UAC:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE scenario SYSTEM "sipp.dtd">

<!-- This program is free software; you can redistribute it and/or      -->
<!-- modify it under the terms of the GNU General Public License as     -->
<!-- published by the Free Software Foundation; either version 2 of the -->
<!-- License, or (at your option) any later version.                    -->
<!--                                                                    -->
<!-- This program is distributed in the hope that it will be useful,    -->
<!-- but WITHOUT ANY WARRANTY; without even the implied warranty of     -->
<!-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the      -->
<!-- GNU General Public License for more details.                       -->
<!--                                                                    -->
<!-- You should have received a copy of the GNU General Public License  -->
<!-- along with this program; if not, write to the                      -->
<!-- Free Software Foundation, Inc.,                                    -->
<!-- 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA             -->
<!--                                                                    -->
<!--                 Sipp default 'regexp client' scenario.             -->
<!--                                                                    -->

<scenario name="Client with regexp scenario">
  <send retrans="500">
    <![CDATA[

      INVITE sip:[service]@[remote_ip]:[remote_port] SIP/2.0
      Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
      From: sipp <sip:sipp@[local_ip]:[local_port]>;tag=[pid]SIPpTag02[call_number]
      To: sut <sip:[service]@[remote_ip]:[remote_port]>
      Call-ID: [call_id]
      CSeq: 1 INVITE
      Contact: sip:sipp@[local_ip]:[local_port]
      Max-Forwards: 70
      Subject: Performance Test
      Content-Type: application/sdp
      Content-Length: [len]

      v=0
      o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip]
      s=-
      c=IN IP[media_ip_type] [media_ip]
      t=0 0
      m=audio [media_port] RTP/AVP 0
      a=rtpmap:0 PCMU/8000

    ]]>
  </send>

  <recv response="100"
        optional="true">
  </recv>

  <recv response="180" optional="true">
  </recv>
  <recv response="183" optional="true">
  </recv>

  <recv response="200" start_rtd="true", rrs="true">
    <!-- Definition of regexp in the action tag. The regexp must follow -->
    <!-- the Posix Extended standard (POSIX 1003.2), see:               -->
    <!--                                                                -->
    <!--   http://www.opengroup.org/onlinepubs/007908799/xbd/re.html    -->
    <!--                                                                -->
    <!-- regexp    : Contain the regexp to use for matching the         -->
    <!--             received message                                   -->
    <!--             MANDATORY                                          -->
    <!-- search_in : msg (try to match against the entire message)      -->
    <!--           : hdr (try to match against a specific SIP header    -->
    <!--             (passed in the header tag)                         -->
    <!--             OPTIONAL - default value : msg                     -->
    <!-- header    : Header to try to match against.                    -->
    <!--             Only used when the search_in tag is set to hdr     -->
    <!--             MANDATORY IF search_in is equal to hdr             -->
    <!-- check_it  : if set to true, the call is marked as failed if    -->
    <!--             the regexp doesn't match.                          -->
    <!--             OPTIONAL - default value : false                   -->
    <!-- assign_to : contain the variable id (integer) or a list of     -->
    <!--             variable id which will be used to store the        -->
    <!--             result of the matching process between the regexp  -->
    <!--             and the message. This variable can be re-used at   -->
    <!--             a later time in the scenario using '[$n]' syntax   -->
    <!--             where n is the variable id.                        -->
    <!--             MANDATORY                                          -->
    <action>
      <ereg regexp="<(.*)>"
            search_in="hdr"
            header="Contact:"
            check_it="true"
            assign_to="6,7"/>
    </action>
  </recv>

  <send>
    <![CDATA[
      ACK sip:[service]@[remote_ip]:[remote_port] SIP/2.0
      Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
      [routes]
      Route: <[$7]>
      From: sipp <sip:sipp@[local_ip]:[local_port]>;tag=[pid]SIPpTag02[call_number]
      To: sut <sip:[service]@[remote_ip]:[remote_port]>[peer_tag_param]
      Call-ID: [call_id]
      CSeq: 1 ACK
      Contact: sip:sipp@[local_ip]:[local_port]
      Max-Forwards: 70
      Subject: Performance Test
      XContactinOK: [$6]
      Content-Length: 0
    ]]>
  </send>

  <!-- This delay can be customized by the -d command-line option       -->
  <!-- or by adding a 'milliseconds = "value"' option here.           -->
  <pause milliseconds = "1000"/>

  <!-- The 'crlf' option inserts a blank line in the statistics report. -->
  <send retrans="500">
    <![CDATA[

      BYE sip:[service]@[remote_ip]:[remote_port] SIP/2.0
      Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
      [routes]
      Route: <[$7]>
      From: sipp <sip:sipp@[local_ip]:[local_port]>;tag=[pid]SIPpTag02[call_number]
      To: sut <sip:[service]@[remote_ip]:[remote_port]>[peer_tag_param]
      Call-ID: [call_id]
      CSeq: 2 BYE
      Contact: sip:sipp@[local_ip]:[local_port]
      Max-Forwards: 70
      Subject: Performance Test
      Content-Length: 0

    ]]>
  </send>

  <recv response="200" crlf="true" rtd="true">
  </recv>

  <!-- definition of the response time repartition table (unit is ms)   -->
  <ResponseTimeRepartition value="1000, 1040, 1080, 1120, 1160, 1200"/>

  <!-- definition of the call length repartition table (unit is ms)     -->
  <CallLengthRepartition value="1000, 1100, 1200, 1300, 1400"/>

</scenario>


SIPP UAS:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE scenario SYSTEM "sipp.dtd">

<!-- This program is free software; you can redistribute it and/or      -->
<!-- modify it under the terms of the GNU General Public License as     -->
<!-- published by the Free Software Foundation; either version 2 of the -->
<!-- License, or (at your option) any later version.                    -->
<!--                                                                    -->
<!-- This program is distributed in the hope that it will be useful,    -->
<!-- but WITHOUT ANY WARRANTY; without even the implied warranty of     -->
<!-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the      -->
<!-- GNU General Public License for more details.                       -->
<!--                                                                    -->
<!-- You should have received a copy of the GNU General Public License  -->
<!-- along with this program; if not, write to the                      -->
<!-- Free Software Foundation, Inc.,                                    -->
<!-- 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA             -->
<!--                                                                    -->
<!--                 Sipp default 'uas' scenario.                       -->
<!--                                                                    -->

<scenario name="Basic UAS responder">
  <!-- By adding rrs="true" (Record Route Sets), the route sets         -->
  <!-- are saved and used for following messages sent. Useful to test   -->
  <!-- against stateful SIP proxies/B2BUAs.                             -->
  <recv request="INVITE" crlf="true", rrs="true">
  </recv>
  <!-- The '[last_*]' keyword is replaced automatically by the          -->
  <!-- specified header if it was present in the last message received  -->
  <!-- (except if it was a retransmission). If the header was not       -->
  <!-- present or if no message has been received, the '[last_*]'       -->
  <!-- keyword is discarded, and all bytes until the end of the line    -->
  <!-- are also discarded.                                              -->
  <!--                                                                  -->
  <!-- If the specified header was present several times in the         -->
  <!-- message, all occurences are concatenated (CRLF separated)        -->
  <!-- to be used in place of the '[last_*]' keyword.                   -->

  <send>
    <![CDATA[

      SIP/2.0 180 Ringing
      [last_Via:]
      [last_From:]
      [last_To:];tag=[pid]SIPpTag01[call_number]
      [last_Call-ID:]
      [last_CSeq:]
      Contact: <sip:[local_ip]:[local_port];transport=[transport]>
      Content-Length: 0

    ]]>
  </send>

  <send retrans="500">
    <![CDATA[

      SIP/2.0 200 OK
      [last_Via:]
      [last_Record-route]
      [last_From:]
      [last_To:];tag=[pid]SIPpTag01[call_number]
      [last_Call-ID:]
      [last_CSeq:]
      Contact: <sip:[local_ip]:[local_port];transport=[transport]>
      Content-Type: application/sdp
      Content-Length: [len]

      v=0
      o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip]
      s=-
      c=IN IP[media_ip_type] [media_ip]
      t=0 0
      m=audio [media_port] RTP/AVP 0
      a=rtpmap:0 PCMU/8000

    ]]>
  </send>

  <recv request="ACK"
        optional="true"
        rtd="true"
        crlf="true">
  </recv>

  <recv request="BYE">
  </recv>

  <send>
    <![CDATA[

      SIP/2.0 200 OK
      [last_Via:]
      [last_Record-route]
      [last_From:]
      [last_To:]
      [last_Call-ID:]
      [last_CSeq:]
      Contact: <sip:[local_ip]:[local_port];transport=[transport]>
      Content-Length: 0

    ]]>
  </send>

  <!-- Keep the call open for a while in case the 200 is lost to be     -->
  <!-- able to retransmit it if we receive the BYE again.               -->
  <timewait milliseconds="4000"/>


  <!-- definition of the response time repartition table (unit is ms)   -->
  <ResponseTimeRepartition value="10, 20, 30, 40, 50, 100, 150, 200"/>

  <!-- definition of the call length repartition table (unit is ms)     -->
  <CallLengthRepartition value="10, 50, 100, 500, 1000, 5000, 10000"/>

</scenario>





On Thu, Dec 15, 2016 at 2:40 PM, Jan Hazenberg <jenus@cyberchaos.nl> wrote:

Wim,

Looks like your ACK is missing the Route header, since ACK is a new transaction kamailio needs to route it based on a preloaded route. When you receive the 200OK in sipp you should save the record route set and use it in the ACK with the "[routes]" statement.

Take a look at the SIPP docs and search for rrs="true". If you take a packet capture on the loopback interface of the kamailio server you will probably see that kamailio keeps looping the ACK until the Max-Forwards is exhausted.

 

Example:

<recv response="200" rtd="true" rrs="true">
</recv>

<send>
<![CDATA[

ACK [next_url] SIP/2.0
Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch]
From: sipp <sip:sipp@[field1]>;tag=[pid]SIPpTag00[call_number]
To: sut <sip:[service]@[field1]>[peer_tag_param]
Call-ID: [call_id]
CSeq: 2 ACK
[routes]
Contact: sip:[service]@[local_ip]:[local_port]
Max-Forwards: 70
Subject: Performance Test
Content-Length: 0

]]>
</send>

 

Regards,

 

Jan Hazenberg

 

 

Wim Van Cauwenbergh schreef op 2016-12-15 15:13:

Hi, I have setup kamailio with the dispatcher module and have a problem with the ACK in response to 200OK not being forwarded by kamailio:
 
Scenario is very simple:
sipp(.219) --> kamailio (.220) --> sipp(.239)
 
SIP trace:
 
root@DNS-enum-8Gb-3:/var/log# ngrep -W byline -d eth0 port 5060
interface: eth0 (10.57.26.0/255.255.255.0)
filter: (ip or ip6) and ( port 5060 )
#
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
CSeq: 1 INVITE.
Max-Forwards: 70.
Subject: Performance Test.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.219.
s=-.
c=IN IP4 10.57.26.219.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
SIP/2.0 100 trying -- your call is important to us.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
CSeq: 1 INVITE.
Server: kamailio (4.2.0 (x86_64/linux)).
Content-Length: 0.
.
 
#
Record-Route: <sip:10.57.26.220;lr>.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
CSeq: 1 INVITE.
Max-Forwards: 69.
Subject: Performance Test.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.219.
s=-.
c=IN IP4 10.57.26.219.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
SIP/2.0 180 Ringing.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
ACK sip:10.57.26.239:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-5.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 ACK.
Max-Forwards: 70.
Subject: Performance Test.
XContactinOK: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
ACK sip:10.57.26.239:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-5.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 ACK.
Max-Forwards: 70.
Subject: Performance Test.
XContactinOK: <sip:10.57.26.239:5060;transport=UDP>.
Content-Length: 0.
.
 
#
BYE sip:10.57.26.239:5060;transport=UDP SIP/2.0.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-7.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 2 BYE.
Max-Forwards: 70.
Subject: Performance Test.
Content-Length: 0.
.
 
#
SIP/2.0 404 Not here.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-7.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 2 BYE.
Server: kamailio (4.2.0 (x86_64/linux)).
Content-Length: 0.
.
 
#
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1--1.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 3 BYE.
Max-Forwards: 70.
Contact: <sip:sipp@10.57.26.219:5060;transport=UDP>.
Content-Length: 0.
.
 
#
SIP/2.0 404 Not here.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1--1.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 3 BYE.
Server: kamailio (4.2.0 (x86_64/linux)).
Content-Length: 0.
.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.220;branch=z9hG4bKf92d.33550a94aa52aef3978cb507902d8aaa.0, SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
#
SIP/2.0 200 OK.
Via: SIP/2.0/UDP 10.57.26.219:5060;branch=z9hG4bK-15698-1-0.
From: sipp <sip:sipp@10.57.26.219:5060>;tag=15698SIPpTag021.
To: sut <sip:service@10.57.26.220:5060>;tag=14783SIPpTag018.
CSeq: 1 INVITE.
Contact: <sip:10.57.26.239:5060;transport=UDP>.
Content-Type: application/sdp.
Content-Length:   135.
.
v=0.
o=user1 53655765 2353687637 IN IP4 10.57.26.239.
s=-.
c=IN IP4 10.57.26.239.
t=0 0.
m=audio 6000 RTP/AVP 0.
a=rtpmap:0 PCMU/8000.
 
 
kamailio.conf:
 
# ----- mi_fifo params -----
modparam("mi_fifo", "fifo_name", "/var/run/kamailio/kamailio_fifo")
modparam("ctl", "binrpc", "unix:/var/run/kamailio/kamailio_ctl")
 
# ----- rr params -----
# add value to ;lr param to cope with most of the UAs
modparam("rr", "enable_full_lr", 0)
# do not append from tag to the RR (no need for this script)
modparam("rr", "append_fromtag", 0)
 
 
# ----- acc params -----
modparam("acc", "log_flag", 1)
modparam("acc", "failed_transaction_flag", 3)
modparam("acc", "log_extra", 
"src_user=$fU;src_domain=$fd;dst_ouser=$tU;dst_user=$rU;dst_domain=$rd;src_ip=$si")
 
# ----- tm params -----
modparam("tm", "fr_timer", 2000)
modparam("tm", "fr_inv_timer", 40000)
 
# ----- dispatcher params -----
#modparam("dispatcher", "db_url",
# "mysql://openser:openserro@localhost/openser")
modparam("dispatcher", "list_file", "/etc/kamailio/dispatcher.list")
modparam("dispatcher", "table_name", "dispatcher")
modparam("dispatcher", "flags", 2)
modparam("dispatcher", "dst_avp", "$avp(AVP_DST)")
modparam("dispatcher", "grp_avp", "$avp(AVP_GRP)")
modparam("dispatcher", "cnt_avp", "$avp(AVP_CNT)")
 
####### Routing Logic ########
 
 
# main request routing logic
 
route {
 
# per request initial checks
route(REQINIT);
 
# handle requests within SIP dialogs
route(WITHINDLG);
 
### only initial requests (no To tag)
 
# CANCEL processing
if (is_method("CANCEL"))
{
if (t_check_trans())
t_relay();
exit;
}
 
t_check_trans();
 
# record routing for dialog forming requests (in case they are routed)
# - remove preloaded route headers
remove_hf("Route");
if (is_method("INVITE|SUBSCRIBE"))
record_route();
 
# account only INVITEs
if (is_method("INVITE"))
{
setflag(1); # do accounting
}
 
# handle presence related requests
route(PRESENCE);
 
# handle registrations
route(REGISTRAR);
 
if ($rU==$null)
{
# request with no Username in RURI
sl_send_reply("484","Address Incomplete");
exit;
}
 
# dispatch destinations
route(DISPATCH);
 
route(RELAY);
}
 
 
route[RELAY] {
if (!t_relay()) {
sl_reply_error();
}
exit;
}
 
# Per SIP request initial checks
route[REQINIT] {
if (!mf_process_maxfwd_header("15")) {
sl_send_reply("483","Too Many Hops");
exit;
}
 
# 1= only check the header RURI,  1126 checks some other general stuff 
if(!sanity_check("1126", "1"))
{
xlog("Malformed SIP message from $si:$sp\n");
exit;
}
}
 
# Handle requests within SIP dialogs
route[WITHINDLG] {
if (has_totag()) {
# sequential request withing a dialog should
# take the path determined by record-routing
xlog("#######WITHINDLG:hastotag $si:$sp\n");
if (loose_route()) {
xlog("#######WITHINDLG:looseroute $si:$sp\n");
if (is_method("BYE")) {
setflag(1); # do accounting ...
setflag(3); # ... even if the transaction fails
}
route(RELAY);
} else {
if (is_method("SUBSCRIBE") && uri == myself) {
# in-dialog subscribe requests
route(PRESENCE);
exit;
}
if ( is_method("ACK") ) {
if ( t_check_trans() ) {
xlog("#######WITHINDLG:ACK transaction found $si:$sp\n");
# non loose-route, but stateful ACK;
# must be ACK after a 487 or e.g. 404 from upstream server
t_relay();
exit;
} else {
# ACK without matching transaction ... ignore and discard.
xlog("#######WITHINDLG:ACK no transaction found so discard $si:$sp\n");
exit;
}
}
sl_send_reply("404","Not here");
}
exit;
}
}
 
 
Debug:
 
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:623]: parse_msg(): SIP Request:
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:625]: parse_msg():  method:  <ACK>
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:627]: parse_msg():  uri:     <sip:10.57.26.239:5060;transport=UDP>
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:629]: parse_msg():  version: <SIP/2.0>
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_via.c:1284]: parse_via_param(): Found param type 232, <branch> = <z9hG4bK-15698-1-5>; state=16
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_via.c:2672]: parse_via(): end of header reached, state=5
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:513]: parse_headers(): parse_headers: Via found, flags=2
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:515]: parse_headers(): parse_headers: this is the first via
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [receive.c:154]: receive_msg(): After parse_msg...
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [receive.c:197]: receive_msg(): preparing to run routing scripts...
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: sl [sl_funcs.c:412]: sl_filter_ACK(): DEBUG : sl_filter_ACK: to late to be a local ACK!
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_addr_spec.c:176]: parse_to_param(): DEBUG: add_param: tag=14783SIPpTag018
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/parse_addr_spec.c:898]: parse_addr_spec(): end of header reached, state=29
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:190]: get_hdr_field(): DEBUG: get_hdr_field: <To> [57]; uri=[sip:service@10.57.26.220:5060]
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:192]: get_hdr_field(): DEBUG: to body [sut <sip:service@10.57.26.220:5060>]
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:170]: get_hdr_field(): get_hdr_field: cseq <CSeq>: <1> <ACK>
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: maxfwd [mf_funcs.c:85]: is_maxfwd_present(): value = 70
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: sanity [mod_sanity.c:255]: w_sanity_check(): sanity checks result: 1
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: siputils [checks.c:106]: has_totag(): totag found
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) ERROR: <script>: #######WITHINDLG:hastotag 10.57.26.219:5060
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:204]: get_hdr_field(): DEBUG: get_hdr_body : content_length=0
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [parser/msg_parser.c:106]: get_hdr_field(): found end of header
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: rr [loose.c:113]: find_first_route(): No Route headers found
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: rr [loose.c:929]: loose_route(): There is no Route HF
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:1072]: t_check_msg(): DEBUG: t_check_msg: msg id=9 global id=8 T start=(nil)
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:527]: t_lookup_request(): t_lookup_request: start searching: hash=53919, isACK=1
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:485]: matching_3261(): DEBUG: RFC3261 transaction matching failed
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:709]: t_lookup_request(): DEBUG: t_lookup_request: no transaction found
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: tm [t_lookup.c:1141]: t_check_msg(): DEBUG: t_check_msg: msg id=9 global id=9 T end=(nil)
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) ERROR: <script>: #######WITHINDLG:ACK no transaction found so discard 10.57.26.219:5060
Dec 15 15:12:02 DNS-enum-8Gb-3 kamailio[6864]: 1(6883) DEBUG: <core> [usr_avp.c:643]: destroy_avp_list(): DEBUG:destroy_avp_list: destroying list (nil)
 
 
 
 

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