Catch dns.message.TrailingJunk

[sijanec]

It would be useful to catch this exception and consider it a nameserver error, just like in the case of SERVFAIL.

n3map 0.8.2: starting mapping of si.
checking SOA...
checking DNSKEY...
starting NSEC3 enumeration...
;; mapping si. .................................................................... ;;
;; records =   0; queries =   3; hashes =   0; ... q/s = 29; coverage =   0.000000% ;;
Traceback (most recent call last):
  File "/home/z/.local/bin/n3map", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/map.py", line 664, in main
    sys.exit(n3map_main(sys.argv))
             ^^^^^^^^^^^^^^^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/map.py", line 253, in n3map_main
    walker.walk()
  File "/home/z/.local/lib/python3.12/site-packages/n3map/nsec3walker.py", line 159, in walk
    self._map_zone()
  File "/home/z/.local/lib/python3.12/site-packages/n3map/nsec3walker.py", line 138, in _map_zone
    res, ns = self.queryprovider.query(query_dn, rrtype='A')
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/queryprovider.py", line 122, in query
    res = self._sendquery(query_dn, ns, rrtype)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/queryprovider.py", line 113, in _sendquery
    return query.query(query_dn, ns, rrtype, self.timeout)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/query.py", line 158, in query
    res = dnspython_query(dname, ns.ip_str(), ns.port, rrtype, timeout)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/z/.local/lib/python3.12/site-packages/n3map/query.py", line 148, in dnspython_query
    r = dns.query.udp(q, ns_ip, port=ns_port, timeout=timeout,
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dns/query.py", line 735, in udp
    (r, received_time) = receive_udp(
                         ^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dns/query.py", line 633, in receive_udp
    r = dns.message.from_wire(
        ^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dns/message.py", line 1367, in from_wire
    m = reader.read()
        ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/dns/message.py", line 1266, in read
    raise TrailingJunk
dns.message.TrailingJunk: The DNS packet passed to from_wire() has extra junk at the end of it.