Hi Logeshwaran,

Actually the error message says everything: "<recv> before <send> sequence 
without a mandatory message. Please remove one 'optional=true' (element 2)..

You have to add a mandatory <recv> before an optional <recv>.  So, your first 
REGISTER request must be mandatory.

Thanks, v.








From: Logeshwaran G [mailto:logeshwara...@gmail.com]
Sent: Thursday, February 09, 2017 10:48 AM
To: sipp-users@lists.sourceforge.net
Subject: [Sipp-users] Fwd: Reg:Sipp Register and 200(ok) should be optional


Hi Team,
I am facing an issue of setting the receiving response of register message as 
optional one. Please find below my xml file and kindly correct me if I am wrong.


<scenario name="Basic UAS responder">

<recv request="REGISTER" crlf="true" optional="true" rrs="true">
</recv>

<send>
    <![CDATA[

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

    ]]>
</send

  <!-- 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" optional="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 seperated)        -->
  <!-- to be used in place of the '[last_*]' keyword.                   -->



 <send>
    <![CDATA[

      SIP/2.0 100 Trying
      [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>
Issue is : while I am executing the sipp command
./sipp -sf sipp_uas_pcap_g729.xml -p 5060 -i 198.8.93.48
i am getting  "<recv> before <send> sequence without a mandatory message. 
Please remove one 'optional=true' (element 2).."

Thanks & Kind Regards,
LogEshwaran G

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