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45 lines
1.5 KiB
Python
45 lines
1.5 KiB
Python
#!/usr/bin/env python
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"""
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$Id$
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Copyright (c) 2006-2012 sqlmap developers (http://www.sqlmap.org/)
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See the file 'doc/COPYING' for copying permission
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"""
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class DNSQuery:
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"""
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Used for making fake DNS resolution responses based on received
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raw request
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Reference(s):
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http://code.activestate.com/recipes/491264-mini-fake-dns-server/
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https://code.google.com/p/marlon-tools/source/browse/tools/dnsproxy/dnsproxy.py
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"""
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def __init__(self, raw):
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self._raw = raw
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self._query = ""
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type_ = (ord(raw[2]) >> 3) & 15 # Opcode bits
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if type_ == 0: # Standard query
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i = 12
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j = ord(raw[i])
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while j != 0:
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self._query += raw[i+1:i+j+1] + '.'
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i = i + j + 1
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j = ord(raw[i])
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def response(self, resolution):
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retval = ""
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if self._query:
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retval += self._raw[:2] + "\x81\x80"
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retval += self._raw[4:6] + self._raw[4:6] + "\x00\x00\x00\x00" # Questions and Answers Counts
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retval += self._raw[12:] # Original Domain Name Question
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retval += "\xc0\x0c" # Pointer to domain name
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retval += "\x00\x01\x00\x01\x00\x00\x00\x3c\x00\x04" # Response type, ttl and resource data length -> 4 bytes
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retval += "".join(chr(int(_)) for _ in resolution.split('.')) # 4 bytes of IP
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return retval
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