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# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import os
import unittest
import dns.exception
import dns.message
query_text = """id 1234
opcode QUERY
rcode NOERROR
flags RD
edns 0
eflags DO
payload 4096
;QUESTION
wwww.dnspython.org. IN A
;ANSWER
;AUTHORITY
;ADDITIONAL"""
goodhex = '04d201000001000000000001047777777709646e73707974686f6e' \
'036f726700000100010000291000000080000000'
goodwire = bytes.fromhex(goodhex)
answer_text = """id 1234
opcode QUERY
rcode NOERROR
flags QR AA RD
;QUESTION
dnspython.org. IN SOA
;ANSWER
dnspython.org. 3600 IN SOA woof.dnspython.org. hostmaster.dnspython.org. 2003052700 3600 1800 604800 3600
;AUTHORITY
dnspython.org. 3600 IN NS ns1.staff.nominum.org.
dnspython.org. 3600 IN NS ns2.staff.nominum.org.
dnspython.org. 3600 IN NS woof.play-bow.org.
;ADDITIONAL
woof.play-bow.org. 3600 IN A 204.152.186.150
"""
goodhex2 = '04d2 8500 0001 0001 0003 0001' \
'09646e73707974686f6e036f726700 0006 0001' \
'c00c 0006 0001 00000e10 0028 ' \
'04776f6f66c00c 0a686f73746d6173746572c00c' \
'7764289c 00000e10 00000708 00093a80 00000e10' \
'c00c 0002 0001 00000e10 0014' \
'036e7331057374616666076e6f6d696e756dc016' \
'c00c 0002 0001 00000e10 0006 036e7332c063' \
'c00c 0002 0001 00000e10 0010 04776f6f6608706c61792d626f77c016' \
'c091 0001 0001 00000e10 0004 cc98ba96'
goodwire2 = bytes.fromhex(goodhex2.replace(' ', ''))
query_text_2 = """id 1234
opcode QUERY
rcode 4095
flags RD
edns 0
eflags DO
payload 4096
;QUESTION
wwww.dnspython.org. IN A
;ANSWER
;AUTHORITY
;ADDITIONAL"""
goodhex3 = '04d2010f0001000000000001047777777709646e73707974686f6e' \
'036f726700000100010000291000ff0080000000'
goodwire3 = bytes.fromhex(goodhex3)
class MessageTestCase(unittest.TestCase):
def test_comparison_eq1(self):
q1 = dns.message.from_text(query_text)
q2 = dns.message.from_text(query_text)
self.assertTrue(q1 == q2)
def test_comparison_ne1(self):
q1 = dns.message.from_text(query_text)
q2 = dns.message.from_text(query_text)
q2.id = 10
self.assertTrue(q1 != q2)
def test_comparison_ne2(self):
q1 = dns.message.from_text(query_text)
q2 = dns.message.from_text(query_text)
q2.question = []
self.assertTrue(q1 != q2)
def test_comparison_ne3(self):
q1 = dns.message.from_text(query_text)
self.assertTrue(q1 != 1)
def test_EDNS_to_wire1(self):
q = dns.message.from_text(query_text)
w = q.to_wire()
self.assertTrue(w == goodwire)
def test_EDNS_from_wire1(self):
m = dns.message.from_wire(goodwire)
self.assertTrue(str(m) == query_text)
def test_EDNS_to_wire2(self):
q = dns.message.from_text(query_text_2)
w = q.to_wire()
self.assertTrue(w == goodwire3)
def test_EDNS_from_wire2(self):
m = dns.message.from_wire(goodwire3)
self.assertTrue(str(m) == query_text_2)
def test_TooBig(self):
def bad():
q = dns.message.from_text(query_text)
for i in range(0, 25):
rrset = dns.rrset.from_text('foo%d.' % i, 3600,
dns.rdataclass.IN,
dns.rdatatype.A,
'10.0.0.%d' % i)
q.additional.append(rrset)
w = q.to_wire(max_size=512)
self.assertRaises(dns.exception.TooBig, bad)
def test_answer1(self):
a = dns.message.from_text(answer_text)
wire = a.to_wire(want_shuffle=False)
self.assertTrue(wire == goodwire2)
def test_TrailingJunk(self):
def bad():
badwire = goodwire + b'\x00'
m = dns.message.from_wire(badwire)
self.assertRaises(dns.message.TrailingJunk, bad)
def test_ShortHeader(self):
def bad():
badwire = b'\x00' * 11
m = dns.message.from_wire(badwire)
self.assertRaises(dns.message.ShortHeader, bad)
def test_RespondingToResponse(self):
def bad():
q = dns.message.make_query('foo', 'A')
r1 = dns.message.make_response(q)
r2 = dns.message.make_response(r1)
self.assertRaises(dns.exception.FormError, bad)
def test_ExtendedRcodeSetting(self):
m = dns.message.make_query('foo', 'A')
m.set_rcode(4095)
self.assertTrue(m.rcode() == 4095)
m.set_rcode(2)
self.assertTrue(m.rcode() == 2)
def test_EDNSVersionCoherence(self):
m = dns.message.make_query('foo', 'A')
m.use_edns(1)
self.assertTrue((m.ednsflags >> 16) & 0xFF == 1)
if __name__ == '__main__':
unittest.main()
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