Fix crash due to DNS timeout #76
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Fixes crash due to
dns.resolver.LifetimeTimeout: The resolution lifetime expired after 19.275 seconds.snallygaster crashes during axfr test if the DNS server of the target responds slowly.
It should not crash completely but instead pass the test as desired behavior.
During crash, snallygaster logs to stderr the following:
Traceback (most recent call last): File "/tools/snallygaster/bin/snallygaster", line 1022, in <module> test(host) File "/tools/snallygaster/bin/snallygaster", line 801, in test_axfr ipv4 = dns.resolver.resolve(r, 'a').rrset File "/tools/snallygaster/lib/python3.10/site-packages/dns/resolver.py", line 1193, in resolve return get_default_resolver().resolve(qname, rdtype, rdclass, tcp, source, File "/tools/snallygaster/lib/python3.10/site-packages/dns/resolver.py", line 1066, in resolve timeout = self._compute_timeout(start, lifetime, File "/tools/snallygaster/lib/python3.10/site-packages/dns/resolver.py", line 879, in _compute_timeout raise LifetimeTimeout(timeout=duration, errors=errors) dns.resolver.LifetimeTimeout: The resolution lifetime expired after 19.275 seconds:And stdout to: