Added raise ValueError to end of _parse_dns_response. Closed socket before returning -1 after a timeout.

Author: BiffoBear

adafruit_wiznet5k/adafruit_wiznet5k_dns.py

@@ -199,6 +199,8 @@ class IN answer.
                     x=answer + 1, y=answer_count
                 ),
             )
+        # No IPv4 address in any answer.
+        raise ValueError()
     except (IndexError, ValueError) as error:
         # IndexError means we ran out of data in an answer, maybe truncated.
         # ValueError means we ran out of answers.
@@ -256,6 +258,7 @@ def gethostbyname(self, hostname):
                         debug=self._debug,
                         message="* DNS ERROR: Did not receive DNS response (socket timeout).",
                     )
+                    self._sock.close()
                     return -1
                 time.sleep(0.05)
             # recv packet into buf