docs: def send_chaos_queries(self):
          """Send chaos queries to identify the DNS server and its manufacturer
  
          Note: we send 2 queries for BIND stuff per RFC 4892 and 1
          query per RFC 6304
  
          Note: we are not waiting on a second response because we
          shouldn't be getting injected packets here
  
          """
          names = ["HOSTNAME.BIND", "VERSION.BIND", "ID.SERVER"]
          self.results = {'exp-name': "chaos-queries"}
          for name in names:
              self.results[name] = {}
              for nameserver in self.nameservers:
                  sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
                  sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
                  sock.settimeout(self.timeout)
                  query = dns.message.make_query(name,
                                                 dns.rdatatype.from_text("TXT"),
                                                 dns.rdataclass.from_text("CH"))
                  sock.sendto(query.to_wire(), (nameserver, 53))
                  reads, _, _ = select.select([sock], [], [], self.timeout)
                  if len(reads) == 0:
                      self.results[name][nameserver] = None
                  else:
                      response = reads[0].recvfrom(4096)[0]
                      self.results[name][nameserver] = b64encode(response)
          return self.results