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# -*- coding: utf-8
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# 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 unittest
from io import BytesIO
import dns.edns
class OptionTestCase(unittest.TestCase):
def testGenericOption(self):
opt = dns.edns.GenericOption(3, b'data')
io = BytesIO()
opt.to_wire(io)
data = io.getvalue()
self.assertEqual(data, b'data')
self.assertEqual(dns.edns.option_from_wire(3, data, 0, len(data)), opt)
def testECSOption_prefix_length(self):
opt = dns.edns.ECSOption('1.2.255.33', 20)
io = BytesIO()
opt.to_wire(io)
data = io.getvalue()
self.assertEqual(data, b'\x00\x01\x14\x00\x01\x02\xf0')
def testECSOption(self):
opt = dns.edns.ECSOption('1.2.3.4', 24)
io = BytesIO()
opt.to_wire(io)
data = io.getvalue()
self.assertEqual(data, b'\x00\x01\x18\x00\x01\x02\x03')
def testECSOption25(self):
opt = dns.edns.ECSOption('1.2.3.255', 25)
io = BytesIO()
opt.to_wire(io)
data = io.getvalue()
self.assertEqual(data, b'\x00\x01\x19\x00\x01\x02\x03\x80')
opt2 = dns.edns.option_from_wire(dns.edns.ECS, data, 0, len(data))
self.assertEqual(opt2.otype, dns.edns.ECS)
self.assertEqual(opt2.address, '1.2.3.128')
self.assertEqual(opt2.srclen, 25)
self.assertEqual(opt2.scopelen, 0)
def testECSOption_v6(self):
opt = dns.edns.ECSOption('2001:4b98::1')
io = BytesIO()
opt.to_wire(io)
data = io.getvalue()
self.assertEqual(data, b'\x00\x02\x38\x00\x20\x01\x4b\x98\x00\x00\x00')
opt2 = dns.edns.option_from_wire(dns.edns.ECS, data, 0, len(data))
self.assertEqual(opt2.otype, dns.edns.ECS)
self.assertEqual(opt2.address, '2001:4b98::')
self.assertEqual(opt2.srclen, 56)
self.assertEqual(opt2.scopelen, 0)
def testECSOption_from_text_valid(self):
ecs1 = dns.edns.ECSOption.from_text('1.2.3.4/24/0')
self.assertEqual(ecs1, dns.edns.ECSOption('1.2.3.4', 24, 0))
ecs2 = dns.edns.ECSOption.from_text('1.2.3.4/24')
self.assertEqual(ecs2, dns.edns.ECSOption('1.2.3.4', 24, 0))
ecs3 = dns.edns.ECSOption.from_text('ECS 1.2.3.4/24')
self.assertEqual(ecs3, dns.edns.ECSOption('1.2.3.4', 24, 0))
ecs4 = dns.edns.ECSOption.from_text('ECS 1.2.3.4/24/32')
self.assertEqual(ecs4, dns.edns.ECSOption('1.2.3.4', 24, 32))
ecs5 = dns.edns.ECSOption.from_text('2001:4b98::1/64/56')
self.assertEqual(ecs5, dns.edns.ECSOption('2001:4b98::1', 64, 56))
ecs6 = dns.edns.ECSOption.from_text('2001:4b98::1/64')
self.assertEqual(ecs6, dns.edns.ECSOption('2001:4b98::1', 64, 0))
ecs7 = dns.edns.ECSOption.from_text('ECS 2001:4b98::1/0')
self.assertEqual(ecs7, dns.edns.ECSOption('2001:4b98::1', 0, 0))
ecs8 = dns.edns.ECSOption.from_text('ECS 2001:4b98::1/64/128')
self.assertEqual(ecs8, dns.edns.ECSOption('2001:4b98::1', 64, 128))
def testECSOption_from_text_invalid(self):
with self.assertRaises(ValueError):
dns.edns.ECSOption.from_text('some random text 1.2.3.4/24/0 24')
with self.assertRaises(ValueError):
dns.edns.ECSOption.from_text('1.2.3.4/twentyfour')
with self.assertRaises(ValueError):
dns.edns.ECSOption.from_text('1.2.3.4/24/O') # <-- that's not a zero
with self.assertRaises(ValueError):
dns.edns.ECSOption.from_text('')
with self.assertRaises(ValueError):
dns.edns.ECSOption.from_text('1.2.3.4/2001:4b98::1/24')
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