[OpenSIPS-Users] check for NULL values

[Pasan Meemaduma]

 Hi Bogdan,
I'm not seeing any other related error msg prior to this. I'm calling this test in request route for a REGISTER request. Before the error pops up I could see the received msg successfully parse by opensips and can see value of To uri
 Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_msg: SIP Request:
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_msg:  method:  <REGISTER>
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_msg:  uri:     <sip:xx.xx.xx.xx>
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_msg:  version: <SIP/2.0>
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=2
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_via_param: found param type 232, <branch> = <z9hG4bK-24790813>; state=16
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_via: end of header reached, state=5
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: via found, flags=2
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: this is the first via
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:receive_msg: After parse_msg...
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:receive_msg: preparing to run routing scripts...
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=100
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:_parse_to: end of header reached, state=10
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:_parse_to: display={XXXXXXXXXX}, ruri={sip:XXXXXXXXXX at xx.xx.xx.x}
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:get_hdr_field: <To> [48]; uri=[sip:XXXXXXXXXX at x.x.x.x]
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:get_hdr_field: to body [XXXXXXXXXX <sip:XXXXXXXXXX at x.x.x.x>#015#012]
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:get_hdr_field: cseq <CSeq>: <79474> <REGISTER>
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:maxfwd:is_maxfwd_present: value = 70
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_to_param: tag=46474fbe5728f700o0
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:_parse_to: end of header reached, state=29
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:_parse_to: display={XXXXXXXXXX}, ruri={sip:XXXXXXXXXX at x.x.x.x}
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=200
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:get_hdr_field: content_length=0
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:get_hdr_field: found end of header

and following are the line that I get before the error If I set log level to 6
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=ffffffffffffffff
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=ffffffffffffffff
Nov 15 18:19:19  /usr/sbin/opensips[21608]: DBG:core:parse_headers: flags=ffffffffffffffff
Nov 15 18:19:19  /usr/sbin/opensips[21608]: ERROR:core:comp_scriptvar: cannot get left var value
Nov 15 18:19:19  /usr/sbin/opensips[21608]: WARNING:core:do_action: error in expression at /etc/opensips/opensips.cfg:807


 

    On Wednesday, 14 November 2018, 7:19:44 PM GMT+5:30, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:  
 
  Hi Pasan,
 
 It should be fine if $tu would translate to NULL. The script handles this case. But I'm afraid you have something else there, like another deeper error that prevents the $tu variable to be evaluated.
 
 Do you see any other errors before the mentioned ones ? what is the type of route where you do the test ?
 
 Regards,
  Bogdan-Andrei Iancu

OpenSIPS Founder and Developer
  http://www.opensips-solutions.com
OpenSIPS Bootcamp 2018
  http://opensips.org/training/OpenSIPS_Bootcamp_2018/
 On 11/13/2018 10:56 AM, Pasan Meemaduma via Users wrote:
  
  Hey, 
  Anyone have a suggestion for this?
  
      On Thursday, 8 November 2018, 8:09:50 AM GMT+5:30, Pasan Meemaduma <pasandev at ymail.com> wrote:  
  
     Hi Guys, 
  I have a check for NULL for $tu var in the script, But when the value is missing I'm getting the following error. 
  ERROR:core:comp_scriptvar: cannot get left var value
 
  WARNING:core:do_action: error in expression at /etc/opensips/opensips.cfg:806 
  and line 806 contains following. 
      if ( $tu != NULL ) {
         remove("location","$tu");
     }
 
  any suggestion on how to test for NULL values without getting above error. I'm using opensips 2.3.5 
  
  
         
  
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