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Fixes #4081

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This commit is contained in:
Miroslav Stampar 2020-01-23 11:55:41 +01:00
parent 6b1f4965ed
commit 984808cc26
2 changed files with 14 additions and 9 deletions
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21
lib/request/dns.py
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@ -19,23 +19,28 @@ class DNSQuery(object):
"""
>>> DNSQuery(b'|K\\x01 \\x00\\x01\\x00\\x00\\x00\\x00\\x00\\x01\\x03www\\x06google\\x03com\\x00\\x00\\x01\\x00\\x01\\x00\\x00)\\x10\\x00\\x00\\x00\\x00\\x00\\x00\\x0c\\x00\\n\\x00\\x08O4|Np!\\x1d\\xb3')._query == b"www.google.com."
True
>>> DNSQuery(b'\\x00')._query == b""
True
"""
def __init__(self, raw):
self._raw = raw
self._query = b""
type_ = (ord(raw[2:3]) >> 3) & 15 # Opcode bits
try:
type_ = (ord(raw[2:3]) >> 3) & 15 # Opcode bits
if type_ == 0: # Standard query
i = 12
j = ord(raw[i:i + 1])
while j != 0:
self._query += raw[i + 1:i + j + 1] + b'.'
i = i + j + 1
if type_ == 0: # Standard query
i = 12
j = ord(raw[i:i + 1])
while j != 0:
self._query += raw[i + 1:i + j + 1] + b'.'
i = i + j + 1
j = ord(raw[i:i + 1])
except TypeError:
pass
def response(self, resolution):
"""
Crafts raw DNS resolution response packet