cvs2svn
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Sprout from bmsi 2005-05-31 18:23:49 UTC Stuart Gathman <stuart@gathman.org> 'Development changes since 0.7.2' Cherrypick from master 2005-07-20 14:56:38 UTC Stuart Gathman <stuart@gathman.org> 'Handle corrupt ZIP attachments': COPYING CREDITS MANIFEST.in Milter/__init__.py Milter/dsn.py Milter/dynip.py NEWS TODO bms.py faq.html milter.cfg milter.html milter.spec miltermodule.c mime.py setup.cfg setup.py softfail.txt spf.py spfquery.py strike3.txt test/zip1 test/zip2 test/zip3 test/ziploop testmime.py
94 lines
2.4 KiB
Python
94 lines
2.4 KiB
Python
# Author: Stuart D. Gathman <stuart@bmsi.com>
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# Copyright 2005 Business Management Systems, Inc.
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# This code is under the GNU General Public License. See COPYING for details.
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# Heuristically determine whether a domain name is for a dynamic IP.
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# examples we don't yet recognize:
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#
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# wiley-268-8196.roadrunner.nf.net at ('205.251.174.46', 4810)
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# cbl-sd-02-79.aster.com.do at ('200.88.62.79', 4153)
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import re
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ip3 = re.compile('[0-9]{1,3}')
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hpats = (
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'h[0-9a-f]{12}[.]',
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'h\d*n\d*c\d*o\d*\.',
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'pcp\d{6,10}pcs[.]',
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'no-reverse',
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'S[0-9a-f]{16}[.][a-z]{2}[.]',
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'user<3>\.',
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'[Cc]ust<3>\.',
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'^<3>\.',
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'ppp[^.]*<3>\.',
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'-ppp\d*\.',
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'\d*-<3>\.',
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'[0-9a-f]{1,3}-<3>\.',
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'p<3>\.pool',
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'h<3>\.',
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'xdsl-\d*\.',
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'-\d*-\d*\.',
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'\.adsl\.',
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'\.cable\.'
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)
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rehmac = re.compile('|'.join(hpats))
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def is_dynip(host,addr):
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"""Return True if hostname is for a dynamic ip.
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Examples:
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>>> is_dynip('post3.fabulousdealz.com','69.60.99.112')
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False
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>>> is_dynip('adsl-69-208-201-177.dsl.emhril.ameritech.net','69.208.201.177')
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True
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>>> is_dynip('[1.2.3.4]','1.2.3.4')
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True
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"""
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if host.startswith('[') and host.endswith(']'):
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return True
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if addr:
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if host.find(addr) >= 0: return True
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a = addr.split('.')
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ia = map(int,a)
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h = host
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m = ip3.findall(host)
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if m:
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g = map(int,m)
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ia3 = (ia[1:],ia[:3])
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if g[-3:] in ia3: return True
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if g[0] == ia[3] and g[1:3] == ia[:2]: return True
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if g[-2:] == ia[2:]: return True
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g.reverse()
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if g[:3] in ia3: return True
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if g[:2] == ia[2:]: return True
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if ia[2:] in (g[:2],g[-2:]): return True
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for m in ip3.finditer(host):
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if int(m.group()) == ia[3]:
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h = host[:m.start()] + '<3>' + host[m.end():]
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break
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if rehmac.search(h): return True
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if host.find(''.join(a[:3])) >= 0: return True
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if host.find(''.join(a[1:])) >= 0: return True
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x = "%02x%02x%02x%02x" % tuple(ia)
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if host.lower().find(x) >= 0: return True
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return False
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if __name__ == '__main__':
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import fileinput
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import sets
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seen = sets.Set()
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for ln in fileinput.input():
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a = ln.split()
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if a[3:5] == ['connect','from']:
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host = a[5]
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if host.startswith('[') and host.endswith(']'):
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continue # no PTR
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ip = a[7][2:-2]
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if ip in seen: continue
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seen.add(ip)
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if is_dynip(host,ip):
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print '%s\t%s DYN' % (ip,host)
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else:
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print '%s\t%s' % (ip,host)
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