Binary Scan help with an iRule

Yes, citizen_elah is correct, those should have been defined as global vars, my bad, sorry guys:

when RULE_INIT {
  log local0. "0001 iRule RealEC-iRule initialized"
   Convert Text to HEX before Client_Accepted so we only do this task once.
  set ::InsertService "0049006e00730065007200740053006500720076006900630065"
  set ::TranOrigID "005400720061006e004f00720069006700490044"
  set ::TranRefNum "005400720061006e005200650066004e0075006d"
}
when CLIENT_ACCEPTED {
  log local0. "0002 New client connection from [IP::client_addr]:[TCP::client_port]"
  TCP::collect
  log local0. "0003 Collecting"
}
when CLIENT_DATA {
  binary scan [TCP::payload] H128 clientdata
  log local0. "0004 clientdata: $clientdata"
   Look for InsertService 128 bites into the TCP Payload
  set svc_event [findstr $clientdata $::InsertService 52 ]
   If we see Insert Service set Persist
  if { [string first $::InsertService $clientdata] != -1 } {
     Look for TranOrigID, offset 40 (Hex) and stop at "&" (0x26)
    set trans_id [findstr $clientdata $::TranOrigID 40 "26"]
     Look for TranRefNum, offset 40 (Hex) and stop at "&" (0x26)
    set ref_id [findstr $clientdata $::TranRefNum 40 "26"]
     Concantenate the two values and persist
    set db_id $trans_id:$ref_id
    if { $db_id != "" } {
      log local0. "0005 DB-ID=$db_id"
      persist uie $db_id
      log local0. "Persisting $db_id to [persist lookup uie $db_id]"
      TCP::release
    }
  }
}

Global variables are shared across all connections, so anything that's constant for all connections should be defined as a global variable to save memory. Any variable whose value is expected to vary per connection must be defined as a non-global variable.

HTH

/deb