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snmpscan.py: ignore bad DNS config (#8656) 

When someone has configured reverse dns that points to an incorrect dns hostname, this should revert to IP properly
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Tony Murray 2018-05-04 09:46:18 -05:00 committed by GitHub
parent 4140796807
commit e1a3533fbe
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 3 additions and 2 deletions
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snmp-scan.py
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@ -30,7 +30,7 @@ import json
from collections import namedtuple from collections import namedtuple
from multiprocessing import Pool from multiprocessing import Pool
from os import path, chdir from os import path, chdir
from socket import gethostbyname, gethostbyaddr, herror from socket import gethostbyname, gethostbyaddr, herror, gaierror
from subprocess import check_output, CalledProcessError from subprocess import check_output, CalledProcessError
from sys import stdout from sys import stdout
from time import time from time import time
@ -114,10 +114,11 @@ def scan_host(ip):
try: try:
try: try:
# attempt to convert IP to hostname, if anything goes wrong, just use the IP
tmp = gethostbyaddr(ip)[0] tmp = gethostbyaddr(ip)[0]
if gethostbyname(tmp) == ip: # check that forward resolves if gethostbyname(tmp) == ip: # check that forward resolves
hostname = tmp hostname = tmp
except herror: except (herror, gaierror):
pass pass
try: try: