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# Unix SMB/CIFS implementation.
# Copyright (C) Andrew Bartlett 2007
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import sys
from samba import credentials
from samba.dcerpc import dns, dnsserver
from samba.netcmd.dns import data_to_dns_record
from samba.tests.subunitrun import SubunitOptions, TestProgram
from samba import werror, WERRORError
from samba.tests.dns_base import DNSTest
import samba.getopt as options
import optparse
parser = optparse.OptionParser(
"dns_wildcard.py <server name> <server ip> [options]")
sambaopts = options.SambaOptions(parser)
parser.add_option_group(sambaopts)
# This timeout only has relevance when testing against Windows
# Format errors tend to return patchy responses, so a timeout is needed.
parser.add_option("--timeout", type="int", dest="timeout",
help="Specify timeout for DNS requests")
# To run against Windows
# python python/samba/tests/dns_wildcard.py computer_name ip
# -U"Administrator%admin_password"
# --realm=Domain_name
# --timeout 10
#
# use command line creds if available
credopts = options.CredentialsOptions(parser)
parser.add_option_group(credopts)
subunitopts = SubunitOptions(parser)
parser.add_option_group(subunitopts)
opts, args = parser.parse_args()
lp = sambaopts.get_loadparm()
creds = credopts.get_credentials(lp)
timeout = opts.timeout
if len(args) < 2:
parser.print_usage()
sys.exit(1)
server_name = args[0]
server_ip = args[1]
creds.set_krb_forwardable(credentials.NO_KRB_FORWARDABLE)
WILDCARD_IP = "1.1.1.1"
WILDCARD = "*.wildcardtest"
EXACT_IP = "1.1.1.2"
EXACT = "exact.wildcardtest"
LEVEL2_WILDCARD_IP = "1.1.1.3"
LEVEL2_WILDCARD = "*.level2.wildcardtest"
LEVEL2_EXACT_IP = "1.1.1.4"
LEVEL2_EXACT = "exact.level2.wildcardtest"
class TestWildCardQueries(DNSTest):
def setUp(self):
super(TestWildCardQueries, self).setUp()
global server, server_ip, lp, creds, timeout
self.server = server_name
self.server_ip = server_ip
self.lp = lp
self.creds = creds
self.timeout = timeout
# Create the dns records
self.dns_records = [(dns.DNS_QTYPE_A,
"%s.%s" % (WILDCARD, self.get_dns_domain()),
WILDCARD_IP),
(dns.DNS_QTYPE_A,
"%s.%s" % (EXACT, self.get_dns_domain()),
EXACT_IP),
(dns.DNS_QTYPE_A,
("%s.%s" % (
LEVEL2_WILDCARD,
self.get_dns_domain())),
LEVEL2_WILDCARD_IP),
(dns.DNS_QTYPE_A,
("%s.%s" % (
LEVEL2_EXACT,
self.get_dns_domain())),
LEVEL2_EXACT_IP)]
c = self.dns_connect()
for (typ, name, data) in self.dns_records:
self.add_record(c, typ, name, data)
def tearDown(self):
c = self.dns_connect()
for (typ, name, data) in self.dns_records:
self.delete_record(c, typ, name, data)
def dns_connect(self):
binding_str = "ncacn_ip_tcp:%s[sign]" % self.server_ip
return dnsserver.dnsserver(binding_str, self.lp, self.creds)
def delete_record(self, dns_conn, typ, name, data):
rec = data_to_dns_record(typ, data)
del_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
del_rec_buf.rec = rec
try:
dns_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
0,
self.server,
self.get_dns_domain(),
name,
None,
del_rec_buf)
except WERRORError as e:
# Ignore record does not exist errors
if e.args[0] != werror.WERR_DNS_ERROR_NAME_DOES_NOT_EXIST:
raise e
def add_record(self, dns_conn, typ, name, data):
rec = data_to_dns_record(typ, data)
add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
add_rec_buf.rec = rec
try:
dns_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
0,
self.server,
self.get_dns_domain(),
name,
add_rec_buf,
None)
except WERRORError as e:
raise e
def test_one_a_query_match_wildcard(self):
"Query an A record, should match the wildcard entry"
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "miss.wildcardtest.%s" % self.get_dns_domain()
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, WILDCARD_IP)
def test_one_a_query_wildcard_entry(self):
"Query the wildcard entry"
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "%s.%s" % (WILDCARD, self.get_dns_domain())
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, WILDCARD_IP)
def test_one_a_query_exact_match(self):
"""Query an entry that matches the wild card but has an exact match as
well.
"""
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "%s.%s" % (EXACT, self.get_dns_domain())
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, EXACT_IP)
def test_one_a_query_match_wildcard_l2(self):
"Query an A record, should match the level 2 wildcard entry"
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "miss.level2.wildcardtest.%s" % self.get_dns_domain()
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, LEVEL2_WILDCARD_IP)
def test_one_a_query_exact_match_l2(self):
"""Query an entry that matches the wild card but has an exact match as
well.
"""
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "%s.%s" % (LEVEL2_EXACT, self.get_dns_domain())
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, LEVEL2_EXACT_IP)
def test_one_a_query_wildcard_entry_l2(self):
"Query the level 2 wildcard entry"
p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
questions = []
# Check the record
name = "%s.%s" % (LEVEL2_WILDCARD, self.get_dns_domain())
q = self.make_name_question(name,
dns.DNS_QTYPE_A,
dns.DNS_QCLASS_IN)
questions.append(q)
self.finish_name_packet(p, questions)
(response, response_packet) =\
self.dns_transaction_udp(p, host=self.server_ip)
self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
self.assertEquals(response.ancount, 1)
self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_A)
self.assertEquals(response.answers[0].rdata, LEVEL2_WILDCARD_IP)
TestProgram(module=__name__, opts=subunitopts)
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