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[validate-dns] print the error if an unknown error occurs,

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so that the script doesn't completely exit upon such errors
- add warning after summary if at least one 'error' occured
- align line beginnings
This commit is contained in:
lare 2023-11-11 20:35:10 +01:00
parent d3de73d1f3
commit bb37cb9223
No known key found for this signature in database
1 changed files with 52 additions and 40 deletions
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40
validate-my-dns.py
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@ -249,6 +249,19 @@ def get_domain_by_mntner(mntner):
return domains
# if an unknown error occurs: notify the user
def _handle_unknown_error(e: Exception, nserver: str, domain_name: str):
global errors
print(f"-----------------")
print(f"Error: unknown/unexpected error occured while querying {nserver} for {domain_name}")
print(f"Error: '{e.__class__.__module__}.{e.__class__.__name__}': '{str(e)}'")
print(f"Note: please check your nameserver, your network and any related configuration")
print(f"-----------------")
errors += 1
time.sleep(3)
return False
def get_soa(domain_name, nserver):
"""query dns server for SOA"""
global errors, summary
@ -270,11 +283,7 @@ def get_soa(domain_name, nserver):
summary[domain_name][SUMMARY.SERVFAIL] += 1
return False
except Exception as e:
print(
f"ERROR: unknown error occured while querying {nserver} for {domain_name}: '{e}'")
errors += 1
time.sleep(3)
return False
return _handle_unknown_error(e)
# raise e
if response[0].rcode() != 0:
# HANDLE QUERY FAILED (SERVER ERROR OR NO SOA RECORD)
@ -330,6 +339,8 @@ def get_ns(domain_name, nserver):
f"ERROR: server replied with different different ip than requested: error: {e}")
errors += 1
return False
except Exception as e:
return _handle_unknown_error(e, nserver=nserver, domain_name=domain_name)
if response[0].rcode() != 0:
# HANDLE QUERY FAILED (SERVER ERROR OR NO NS RECORD)
print(
@ -390,6 +401,8 @@ def get_dnskey(domain_name, nserver):
summary[domain_name][SUMMARY.REFUSED] += 1
errors += 1
return False
except Exception as e:
return _handle_unknown_error(e, nserver=nserver, domain_name=domain_name )
if response[0].rcode() != 0:
# HANDLE QUERY FAILED (SERVER ERROR OR NO DNSKEY RECORD)
@ -515,6 +528,9 @@ def check_dnssec(domain_name, domain_data):
f"WARN: querying {nserver} ({nsaddr}) for {domain_name} timed out")
summary[domain_name][SUMMARY.TIMEOUT] += 1
continue
except Exception as e:
_handle_unknown_error(e, nserver=f"{nserver} ({nsaddr})", domain_name=domain_name)
continue
if no_ds_rdatas:
print(
@ -581,16 +597,9 @@ def main(mntner):
# get all domains/inet(6)nums of the mntner
domains = get_domain_by_mntner(mntner=mntner)
# global _tmp_continue, _tmp_found
# _tmp_found = False
# _tmp_continue = "10.in-addr.arpa"
def check_dns(domain_name):
global errors, summary
# global _tmp_found, _tmp_continue
# if domain_name == _tmp_continue:
# _tmp_found = True
# if not _tmp_found:
# return
summary[domain_name] = [0, 0, 0, 0, 0, 0, 0, 0]
# check if the domain doesn't have DS data
if domains[domain_name]["ds-rdata"] == []:
@ -736,12 +745,15 @@ def main(mntner):
if len(_domain) > _max_domain_length:
_max_domain_length = len(_domain)
print("\n\nSummary:\n")
print("```\n\nSummary:\n")
print(f"{'domain name'.ljust(_max_domain_length)} | success | dnssec fail | wrong NS | wrong SOA | NXDOMAIN | REFUSED | SERVFAIL | timeout")
print(f"-{'-'.rjust(_max_domain_length, '-') }-|---------|-------------|----------|-----------|----------|---------| -------- | -------")
for domain in summary:
print(f" {domain.rjust(1).ljust(_max_domain_length)} | {str(summary[domain][SUMMARY.SUCCESS]).rjust(7)} | {str(summary[domain][SUMMARY.DNSSEC_FAIL]).rjust(11)} | {str(summary[domain][SUMMARY.WRONG_NS]).rjust(8)} | {str(summary[domain][SUMMARY.WRONG_SOA]).rjust(9)} | {str(summary[domain][SUMMARY.NXDOMAIN]).rjust(8)} | {str(summary[domain][SUMMARY.REFUSED]).rjust(7)} | {str(summary[domain][SUMMARY.SERVFAIL]).rjust(8)} | {str(summary[domain][SUMMARY.TIMEOUT]).rjust(7)}")
print("```\n")
if errors > 0:
print("WARN: at least one 'error' occured while checking. check the table and output above")
# print(summary)