CVE-2016-0771: tests/dns: Remove dependencies on env variables
[samba.git] / python / samba / tests / dns.py
index e153a2b1b94b8f3eb4d57514f816c0841c01a8a7..75b5b7f085a2e77d69e10874783640369b2ac003 100644 (file)
 #
 
 import os
+import sys
 import struct
 import random
+
+sys.path.insert(0, "bin/python")
+import samba
+samba.ensure_external_module("testtools", "testtools")
+samba.ensure_external_module("subunit", "subunit/python")
+from subunit.run import SubunitTestRunner
+import unittest
+
 from samba import socket
 import samba.ndr as ndr
 from samba import credentials, param
 from samba.tests import TestCase
 from samba.dcerpc import dns, dnsp, dnsserver
+from samba.netcmd.dns import TXTRecord, dns_record_match, data_to_dns_record
+import samba.getopt as options
+import optparse
+
+parser = optparse.OptionParser("dns.py <server name> <server ip> [options]")
+sambaopts = options.SambaOptions(parser)
+parser.add_option_group(sambaopts)
 
 FILTER=''.join([(len(repr(chr(x)))==3) and chr(x) or '.' for x in range(256)])
 
+# use command line creds if available
+credopts = options.CredentialsOptions(parser)
+parser.add_option_group(credopts)
+
+opts, args = parser.parse_args()
+
+lp = sambaopts.get_loadparm()
+creds = credopts.get_credentials(lp)
+
+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)
+
 def make_txt_record(records):
     rdata_txt = dns.txt_record()
     s_list = dnsp.string_list()
@@ -36,10 +69,13 @@ def make_txt_record(records):
 
 class DNSTest(TestCase):
 
-    def get_loadparm(self):
-        lp = param.LoadParm()
-        lp.load(os.getenv("SMB_CONF_PATH"))
-        return lp
+    def setUp(self):
+        global server, server_ip, lp, creds
+        super(DNSTest, self).setUp()
+        self.server = server_name
+        self.server_ip = server_ip
+        self.lp = lp
+        self.creds = creds
 
     def errstr(self, errcode):
         "Return a readable error code"
@@ -96,9 +132,10 @@ class DNSTest(TestCase):
 
     def get_dns_domain(self):
         "Helper to get dns domain"
-        return os.getenv('REALM', 'example.com').lower()
+        return self.creds.get_realm().lower()
 
-    def dns_transaction_udp(self, packet, host=os.getenv('SERVER_IP'), dump=False):
+    def dns_transaction_udp(self, packet, host=server_ip,
+                            dump=False):
         "send a DNS query and read the reply"
         s = None
         try:
@@ -116,7 +153,8 @@ class DNSTest(TestCase):
             if s is not None:
                 s.close()
 
-    def dns_transaction_tcp(self, packet, host=os.getenv('SERVER_IP'), dump=False):
+    def dns_transaction_tcp(self, packet, host=server_ip,
+                            dump=False):
         "send a DNS query and read the reply"
         s = None
         try:
@@ -146,6 +184,47 @@ class DNSTest(TestCase):
            N+=length
         return result
 
+    def make_txt_update(self, prefix, txt_array):
+        p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
+        updates = []
+
+        name = self.get_dns_domain()
+        u = self.make_name_question(name, dns.DNS_QTYPE_SOA, dns.DNS_QCLASS_IN)
+        updates.append(u)
+        self.finish_name_packet(p, updates)
+
+        updates = []
+        r = dns.res_rec()
+        r.name = "%s.%s" % (prefix, self.get_dns_domain())
+        r.rr_type = dns.DNS_QTYPE_TXT
+        r.rr_class = dns.DNS_QCLASS_IN
+        r.ttl = 900
+        r.length = 0xffff
+        rdata = make_txt_record(txt_array)
+        r.rdata = rdata
+        updates.append(r)
+        p.nscount = len(updates)
+        p.nsrecs = updates
+
+        return p
+
+    def check_query_txt(self, prefix, txt_array):
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+        p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
+        questions = []
+
+        q = self.make_name_question(name, dns.DNS_QTYPE_TXT, dns.DNS_QCLASS_IN)
+        questions.append(q)
+
+        self.finish_name_packet(p, questions)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.assertEquals(response.ancount, 1)
+        self.assertEquals(response.answers[0].rdata.txt.str, txt_array)
+
+    def assertIsNotNone(self, item):
+        self.assertTrue(item is not None)
+
 class TestSimpleQueries(DNSTest):
 
     def test_one_a_query(self):
@@ -153,7 +232,7 @@ class TestSimpleQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_A, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -164,14 +243,14 @@ class TestSimpleQueries(DNSTest):
         self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
         self.assertEquals(response.ancount, 1)
         self.assertEquals(response.answers[0].rdata,
-                          os.getenv('SERVER_IP'))
+                          self.server_ip)
 
     def test_one_a_query_tcp(self):
         "create a query packet containing one query record via TCP"
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_A, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -182,14 +261,14 @@ class TestSimpleQueries(DNSTest):
         self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
         self.assertEquals(response.ancount, 1)
         self.assertEquals(response.answers[0].rdata,
-                          os.getenv('SERVER_IP'))
+                          self.server_ip)
 
     def test_one_mx_query(self):
         "create a query packet causing an empty RCODE_OK answer"
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_MX, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -203,7 +282,7 @@ class TestSimpleQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "invalid-%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "invalid-%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_MX, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -219,7 +298,7 @@ class TestSimpleQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_A, dns.DNS_QCLASS_IN)
         questions.append(q)
 
@@ -236,7 +315,7 @@ class TestSimpleQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_ALL, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -253,7 +332,7 @@ class TestSimpleQueries(DNSTest):
         self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
         self.assertEquals(response.ancount, num_answers)
         self.assertEquals(response.answers[0].rdata,
-                          os.getenv('SERVER_IP'))
+                          self.server_ip)
         if dc_ipv6 is not None:
             self.assertEquals(response.answers[1].rdata, dc_ipv6)
 
@@ -262,7 +341,7 @@ class TestSimpleQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_ALL, dns.DNS_QCLASS_NONE)
         questions.append(q)
 
@@ -312,7 +391,7 @@ class TestDNSUpdates(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
         updates = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         u = self.make_name_question(name, dns.DNS_QTYPE_A, dns.DNS_QCLASS_IN)
         updates.append(u)
 
@@ -350,7 +429,7 @@ class TestDNSUpdates(DNSTest):
 
         prereqs = []
         r = dns.res_rec()
-        r.name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        r.name = "%s.%s" % (self.server, self.get_dns_domain())
         r.rr_type = dns.DNS_QTYPE_TXT
         r.rr_class = dns.DNS_QCLASS_NONE
         r.ttl = 1
@@ -376,7 +455,7 @@ class TestDNSUpdates(DNSTest):
 
         prereqs = []
         r = dns.res_rec()
-        r.name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        r.name = "%s.%s" % (self.server, self.get_dns_domain())
         r.rr_type = dns.DNS_QTYPE_TXT
         r.rr_class = dns.DNS_QCLASS_ANY
         r.ttl = 0
@@ -415,44 +494,6 @@ class TestDNSUpdates(DNSTest):
         response = self.dns_transaction_udp(p)
         self.assert_dns_rcode_equals(response, dns.DNS_RCODE_NXRRSET)
 
-    def make_txt_update(self, prefix, txt_array):
-        p = self.make_name_packet(dns.DNS_OPCODE_UPDATE)
-        updates = []
-
-        name = self.get_dns_domain()
-        u = self.make_name_question(name, dns.DNS_QTYPE_SOA, dns.DNS_QCLASS_IN)
-        updates.append(u)
-        self.finish_name_packet(p, updates)
-
-        updates = []
-        r = dns.res_rec()
-        r.name = "%s.%s" % (prefix, self.get_dns_domain())
-        r.rr_type = dns.DNS_QTYPE_TXT
-        r.rr_class = dns.DNS_QCLASS_IN
-        r.ttl = 900
-        r.length = 0xffff
-        rdata = make_txt_record(txt_array)
-        r.rdata = rdata
-        updates.append(r)
-        p.nscount = len(updates)
-        p.nsrecs = updates
-
-        return p
-
-    def check_query_txt(self, prefix, txt_array):
-        name = "%s.%s" % (prefix, self.get_dns_domain())
-        p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
-        questions = []
-
-        q = self.make_name_question(name, dns.DNS_QTYPE_TXT, dns.DNS_QCLASS_IN)
-        questions.append(q)
-
-        self.finish_name_packet(p, questions)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.assertEquals(response.ancount, 1)
-        self.assertEquals(response.answers[0].rdata.txt.str, txt_array)
-
     def test_update_add_txt_record(self):
         "test adding records works"
         prefix, txt = 'textrec', ['"This is a test"']
@@ -461,74 +502,6 @@ class TestDNSUpdates(DNSTest):
         self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
         self.check_query_txt(prefix, txt)
 
-    def test_update_add_null_padded_txt_record(self):
-        "test adding records works"
-        prefix, txt = 'pad1textrec', ['"This is a test"', '', '']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-        prefix, txt = 'pad2textrec', ['"This is a test"', '', '', 'more text']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-        prefix, txt = 'pad3textrec', ['', '', '"This is a test"']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-    # Test is incomplete due to strlen against txt records
-    def test_update_add_null_char_txt_record(self):
-        "test adding records works"
-        prefix, txt = 'nulltextrec', ['NULL\x00BYTE']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, ['NULL'])
-
-        prefix, txt = 'nulltextrec2', ['NULL\x00BYTE', 'NULL\x00BYTE']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, ['NULL', 'NULL'])
-
-    def test_update_add_hex_char_txt_record(self):
-        "test adding records works"
-        prefix, txt = 'hextextrec', ['HIGH\xFFBYTE']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-    def test_update_add_slash_txt_record(self):
-        "test adding records works"
-        prefix, txt = 'slashtextrec', ['Th\\=is=is a test']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-    def test_update_add_two_txt_records(self):
-        "test adding two txt records works"
-        prefix, txt = 'textrec2', ['"This is a test"',
-                                   '"and this is a test, too"']
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
-    def test_update_add_empty_txt_records(self):
-        "test adding two txt records works"
-        prefix, txt = 'emptytextrec', []
-        p = self.make_txt_update(prefix, txt)
-        response = self.dns_transaction_udp(p)
-        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
-        self.check_query_txt(prefix, txt)
-
     def test_delete_record(self):
         "Test if deleting records works"
 
@@ -787,7 +760,7 @@ class TestComplexQueries(DNSTest):
         r.rr_class = dns.DNS_QCLASS_IN
         r.ttl = 900
         r.length = 0xffff
-        r.rdata = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        r.rdata = "%s.%s" % (self.server, self.get_dns_domain())
         updates.append(r)
         p.nscount = len(updates)
         p.nsrecs = updates
@@ -813,7 +786,7 @@ class TestComplexQueries(DNSTest):
         r.rr_class = dns.DNS_QCLASS_NONE
         r.ttl = 0
         r.length = 0xffff
-        r.rdata = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        r.rdata = "%s.%s" % (self.server, self.get_dns_domain())
         updates.append(r)
         p.nscount = len(updates)
         p.nsrecs = updates
@@ -838,10 +811,10 @@ class TestComplexQueries(DNSTest):
         self.assertEquals(response.ancount, 2)
         self.assertEquals(response.answers[0].rr_type, dns.DNS_QTYPE_CNAME)
         self.assertEquals(response.answers[0].rdata, "%s.%s" %
-                          (os.getenv('SERVER'), self.get_dns_domain()))
+                          (self.server, self.get_dns_domain()))
         self.assertEquals(response.answers[1].rr_type, dns.DNS_QTYPE_A)
         self.assertEquals(response.answers[1].rdata,
-                          os.getenv('SERVER_IP'))
+                          self.server_ip)
 
 class TestInvalidQueries(DNSTest):
 
@@ -851,7 +824,7 @@ class TestInvalidQueries(DNSTest):
         s = None
         try:
             s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, 0)
-            s.connect((os.getenv('SERVER_IP'), 53))
+            s.connect((self.server_ip, 53))
             s.send("", 0)
         finally:
             if s is not None:
@@ -860,7 +833,7 @@ class TestInvalidQueries(DNSTest):
         p = self.make_name_packet(dns.DNS_OPCODE_QUERY)
         questions = []
 
-        name = "%s.%s" % (os.getenv('SERVER'), self.get_dns_domain())
+        name = "%s.%s" % (self.server, self.get_dns_domain())
         q = self.make_name_question(name, dns.DNS_QTYPE_A, dns.DNS_QCLASS_IN)
         print "asking for ", q.name
         questions.append(q)
@@ -871,7 +844,7 @@ class TestInvalidQueries(DNSTest):
         self.assert_dns_opcode_equals(response, dns.DNS_OPCODE_QUERY)
         self.assertEquals(response.ancount, 1)
         self.assertEquals(response.answers[0].rdata,
-                          os.getenv('SERVER_IP'))
+                          self.server_ip)
 
     def test_one_a_reply(self):
         "send a reply instead of a query"
@@ -890,7 +863,7 @@ class TestInvalidQueries(DNSTest):
         try:
             send_packet = ndr.ndr_pack(p)
             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
-            host=os.getenv('SERVER_IP')
+            host=self.server_ip
             s.connect((host, 53))
             tcp_packet = struct.pack('!H', len(send_packet))
             tcp_packet += send_packet
@@ -901,6 +874,308 @@ class TestInvalidQueries(DNSTest):
             if s is not None:
                 s.close()
 
-if __name__ == "__main__":
-    import unittest
-    unittest.main()
+class TestRPCRoundtrip(DNSTest):
+    def setUp(self):
+        super(TestRPCRoundtrip, self).setUp()
+        self.rpc_conn = dnsserver.dnsserver("ncacn_ip_tcp:%s[sign]" % (self.server_ip),
+                                            self.lp, self.creds)
+
+    def tearDown(self):
+        super(TestRPCRoundtrip, self).tearDown()
+
+    def test_update_add_txt_rpc_to_dns(self):
+        prefix, txt = 'rpctextrec', ['"This is a test"']
+
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"\\"This is a test\\""')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    def test_update_add_null_padded_txt_record(self):
+        "test adding records works"
+        prefix, txt = 'pad1textrec', ['"This is a test"', '', '']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"\\"This is a test\\"" "" ""'))
+
+        prefix, txt = 'pad2textrec', ['"This is a test"', '', '', 'more text']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"\\"This is a test\\"" "" "" "more text"'))
+
+        prefix, txt = 'pad3textrec', ['', '', '"This is a test"']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"" "" "\\"This is a test\\""'))
+
+    def test_update_add_padding_rpc_to_dns(self):
+        prefix, txt = 'pad1textrec', ['"This is a test"', '', '']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"\\"This is a test\\"" "" ""')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+        prefix, txt = 'pad2textrec', ['"This is a test"', '', '', 'more text']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"\\"This is a test\\"" "" "" "more text"')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+        prefix, txt = 'pad3textrec', ['', '', '"This is a test"']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"" "" "\\"This is a test\\""')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    # Test is incomplete due to strlen against txt records
+    def test_update_add_null_char_txt_record(self):
+        "test adding records works"
+        prefix, txt = 'nulltextrec', ['NULL\x00BYTE']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, ['NULL'])
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"NULL"'))
+
+        prefix, txt = 'nulltextrec2', ['NULL\x00BYTE', 'NULL\x00BYTE']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, ['NULL', 'NULL'])
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"NULL" "NULL"'))
+
+    def test_update_add_null_char_rpc_to_dns(self):
+        prefix, txt = 'nulltextrec', ['NULL\x00BYTE']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"NULL"')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, ['NULL'])
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    def test_update_add_hex_char_txt_record(self):
+        "test adding records works"
+        prefix, txt = 'hextextrec', ['HIGH\xFFBYTE']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"HIGH\xFFBYTE"'))
+
+    def test_update_add_hex_rpc_to_dns(self):
+        prefix, txt = 'hextextrec', ['HIGH\xFFBYTE']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"HIGH\xFFBYTE"')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    def test_update_add_slash_txt_record(self):
+        "test adding records works"
+        prefix, txt = 'slashtextrec', ['Th\\=is=is a test']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"Th\\\\=is=is a test"'))
+
+    # This test fails against Windows as it eliminates slashes in RPC
+    # One typical use for a slash is in records like 'var=value' to
+    # escape '=' characters.
+    def test_update_add_slash_rpc_to_dns(self):
+        prefix, txt = 'slashtextrec', ['Th\\=is=is a test']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '"Th\\\\=is=is a test"')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    def test_update_add_two_txt_records(self):
+        "test adding two txt records works"
+        prefix, txt = 'textrec2', ['"This is a test"',
+                                   '"and this is a test, too"']
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, '"\\"This is a test\\""' +
+                             ' "\\"and this is a test, too\\""'))
+
+    def test_update_add_two_rpc_to_dns(self):
+        prefix, txt = 'textrec2', ['"This is a test"',
+                                   '"and this is a test, too"']
+        prefix = 'rpc' + prefix
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT,
+                                '"\\"This is a test\\""' +
+                                ' "\\"and this is a test, too\\""')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+    def test_update_add_empty_txt_records(self):
+        "test adding two txt records works"
+        prefix, txt = 'emptytextrec', []
+        p = self.make_txt_update(prefix, txt)
+        response = self.dns_transaction_udp(p)
+        self.assert_dns_rcode_equals(response, dns.DNS_RCODE_OK)
+        self.check_query_txt(prefix, txt)
+        self.assertIsNotNone(dns_record_match(self.rpc_conn, self.server_ip,
+                             self.get_dns_domain(),
+                             "%s.%s" % (prefix, self.get_dns_domain()),
+                             dnsp.DNS_TYPE_TXT, ''))
+
+    def test_update_add_empty_rpc_to_dns(self):
+        prefix, txt = 'rpcemptytextrec', []
+
+        name = "%s.%s" % (prefix, self.get_dns_domain())
+
+        rec = data_to_dns_record(dnsp.DNS_TYPE_TXT, '')
+        add_rec_buf = dnsserver.DNS_RPC_RECORD_BUF()
+        add_rec_buf.rec = rec
+        try:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                     0, self.server_ip, self.get_dns_domain(),
+                                     name, add_rec_buf, None)
+
+            self.check_query_txt(prefix, txt)
+        finally:
+            self.rpc_conn.DnssrvUpdateRecord2(dnsserver.DNS_CLIENT_VERSION_LONGHORN,
+                                              0, self.server_ip, self.get_dns_domain(),
+                                              name, None, add_rec_buf)
+
+runner = SubunitTestRunner()
+rc = 0
+if not runner.run(unittest.makeSuite(DNSTest)).wasSuccessful():
+    rc = 1
+if not runner.run(unittest.makeSuite(TestSimpleQueries)).wasSuccessful():
+    rc = 1
+if not runner.run(unittest.makeSuite(TestDNSUpdates)).wasSuccessful():
+    rc = 1
+if not runner.run(unittest.makeSuite(TestComplexQueries)).wasSuccessful():
+    rc = 1
+if not runner.run(unittest.makeSuite(TestInvalidQueries)).wasSuccessful():
+    rc = 1
+if not runner.run(unittest.makeSuite(TestRPCRoundtrip)).wasSuccessful():
+    rc = 1
+
+sys.exit(rc)