chg: [pdns-analyzer] pre-pre-alpha version
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95bc7b033d
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import re
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import redis
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import fileinput
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import json
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r = redis.Redis(host="127.0.0.1",port=6400)
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with open('../etc/records-type.json') as rtypefile:
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rtype = json.load(rtypefile)
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dnstype = {}
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stats = True
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for v in rtype:
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dnstype[(v['type'])] = v['value']
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def process_format_passivedns(line=None):
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# log line example
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# timestamp||ip-src||ip-dst||class||q||type||v||ttl||count
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# 1548624738.280922||192.168.1.12||8.8.8.8||IN||www-google-analytics.l.google.com.||AAAA||2a00:1450:400e:801::200e||299||12
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vkey = ['timestamp','ip-src','ip-dst','class','q','type','v','ttl','count']
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record = {}
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if line is None or line == '':
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return False
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v = line.split("||")
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i = 0
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for r in v:
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# trailing dot is removed and avoid case sensitivity
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if i == 4 or i == 6:
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r = r[:-1]
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r = r.lower()
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# timestamp is just epoch - second precision is only required
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if i == 0:
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r = r.split('.')[0]
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record[vkey[i]] = r
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# replace DNS type with the known DNS record type value
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if i == 5:
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record[vkey[i]] = dnstype[r]
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i = i + 1
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return record
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for l in fileinput.input('-'):
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rdns = process_format_passivedns(line=l.strip())
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print (rdns)
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if rdns is False:
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# need to add logging when it fails
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continue
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if 'q' not in rdns:
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continue
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if rdns['q'] and rdns['type']:
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query = "r:{}:{}".format(rdns['q'],rdns['type'])
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r.sadd(query, rdns['v'])
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res = "v:{}:{}".format(rdns['v'], rdns['type'])
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r.sadd(res, rdns['q'])
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firstseen = "s:{}:{}:{}".format(rdns['q'], rdns['v'], rdns['type'])
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if not r.exists(firstseen):
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r.set(firstseen, rdns['timestamp'])
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lastseen = "l:{}:{}:{}".format(rdns['q'], rdns['v'], rdns['type'])
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last = r.get(lastseen)
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if last is None or int(last) < int(rdns['timestamp']):
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r.set(lastseen, rdns['timestamp'])
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occ = "o:{}:{}:{}".format(rdns['q'], rdns['v'], rdns['type'])
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r.incr(occ, amount=1)
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# TTL distribution stats
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if 'ttl' in rdns:
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r.hincrby('dist:ttl', rdns['ttl'], amount=1)
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if 'class' in rdns:
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r.hincrby('dist:class', rdns['class'], amount=1)
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if stats:
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r.incrby('stats:processed', amount=1)
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print (last)
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print (query)
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if not r:
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continue
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