docs: def parse_status_file(status_file,nas_addr):
      ''' parse openvpn status log
      '''
      session_users = {}
      flag1 = False
      flag2 = False
      with open(status_file) as stlines:
          for line in stlines:
  
              if line.startswith("Common Name"):
                  flag1 = True
                  continue
  
              if line.startswith("ROUTING TABLE"):
                  flag1 = False
                  continue
  
              if line.startswith("Virtual Address"):
                  flag2 = True
                  continue
  
              if line.startswith("GLOBAL STATS"):
                  flag2 = False
                  continue
  
              if flag1:
                  try:
                      username,realaddr,inbytes,outbytes,_ = line.split(',')
                      realip,realport = realaddr.split(':')
                      session_id = md5(nas_addr + realip + realport).hexdigest()
                      session_users.setdefault(session_id, {}).update(dict(
                          session_id=session_id,
                          username=username,
                          realip=realip,
                          realport=realport,
                          inbytes=inbytes,
                          outbytes=outbytes
                      ))
                  except:
                      traceback.print_exc()
  
              if flag2:
                  try:
                      userip,username,realaddr,_ = line.split(',')
                      realip,realport = realaddr.split(':')
                      session_id = md5(nas_addr + realip + realport).hexdigest()
                      session_users.setdefault(session_id, {}).update(dict(
                          session_id=session_id,
                          username=username,
                          realip=realip,
                          realport=realport,
                          userip=userip,
                      ))
                  except:
                      traceback.print_exc()
  
      return session_users