ip6-arpa-scan.py

#!/usr/bin/env python
# Copyright (c) 2016, Peter van Dijk
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from dns import message, query, exception
import sys

queries=0
l=[]
progress=[0]*3
progressperc=0

def tryquery(q, server):
	while 1:
		try:
			return query.udp(q, server, timeout=2)
		except exception.Timeout:
			pass

def drilldown(base, server, limit, depth=0):
	global queries, l, progress, progressperc
	if depth == len(progress):
		progressperc = 0 
		for i in range(len(progress)):
			progressperc = progressperc + (progress[i] / (16.0**(i+1)))*100

	print >> sys.stderr, '\r%*s, %s queries done, %s found, %.2f%% done' % (limit, base, queries, len(l), progressperc),

	q = message.make_query(base, 'PTR')
	r = tryquery(q, server)
	queries = queries + 1
	# print '%s: %s' % (base, r.rcode())
	if r.rcode() == 0:
		if len(base) == limit:
			l.append(base)
		if len(base) < limit:
	 		for c in '0123456789abcdef':
				if depth < len(progress):
					progress[depth]=int(c, 16)
				#print "progress[%s]=%s" % (depth, progress[depth])
				drilldown(c+'.'+base, server, limit, depth+1)
			

(base, server) = sys.argv[1:3]
if len(sys.argv) == 4:
	limit = int(sys.argv[3])/4*2+len('ip6.arpa.')
else:
	limit = 32*2+len('ip6.arpa.')

print 'base %s server %s limit %s' % (base, server, limit)

if base.endswith('ip6.arpa'):
	base = base + '.'

if not base.endswith('ip6.arpa.'):
	print 'please pass an ip6.arpa name'
	sys.exit(1)

try:
	drilldown(base, server, limit)
except KeyboardInterrupt:
	print >> sys.stderr, '\naborted, partial results follow'

print >> sys.stderr, '\nnames found: %s' % len(l)
print >> sys.stderr, 'queries done: %s' % queries
print '\n'.join(l)