C# UserRegistry.Add方法代码示例

 public void TestConstructor()
 {
     var response = new ResponseMessage(
         VersionCode.V3,
         new Header(
             new Integer32(500),
             new Integer32(4000),
             Levels.Reportable),
         new SecurityParameters(
             OctetString.Empty,
             Integer32.Zero,
             Integer32.Zero,
             new OctetString("lextm"),
             OctetString.Empty,
             OctetString.Empty),
         new Scope(
             OctetString.Empty,
             OctetString.Empty,
             new ResponsePdu(0x2C6B, ErrorCode.NoError, 0, new List<Variable>{ new Variable(new ObjectIdentifier("1.3.6.1.1.2.5.0"), new Integer32(400))})),
         DefaultPrivacyProvider.DefaultPair,
         true,
         null);
     var registry = new UserRegistry();
     registry.Add(new OctetString("lextm"), DefaultPrivacyProvider.DefaultPair);
     var messages = MessageFactory.ParseMessages(response.ToBytes(), registry);
     Assert.AreEqual(1, messages.Count);
 }

        public static void Main(string[] args)
        {
            if (args.Length != 0)
            {
                return;
            }

            var users = new UserRegistry();
            users.Add(new OctetString("neither"), DefaultPrivacyProvider.DefaultPair);
            users.Add(new OctetString("authen"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("authentication"))));
            users.Add(new OctetString("privacy"), new DESPrivacyProvider(new OctetString("privacyphrase"),
                                                                         new MD5AuthenticationProvider(new OctetString("authentication")))); 

            var trapv1 = new TrapV1MessageHandler();
            trapv1.MessageReceived += WatcherTrapV1Received;
            var trapv1Mapping = new HandlerMapping("v1", "TRAPV1", trapv1);

            var trapv2 = new TrapV2MessageHandler();
            trapv2.MessageReceived += WatcherTrapV2Received;
            var trapv2Mapping = new HandlerMapping("v2,v3", "TRAPV2", trapv2);

            var inform = new InformRequestMessageHandler();
            inform.MessageReceived += WatcherInformRequestReceived;
            var informMapping = new HandlerMapping("v2,v3", "INFORM", inform);

            var store = new ObjectStore();
            var v1 = new Version1MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v2 = new Version2MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v3 = new Version3MembershipProvider();
            var membership = new ComposedMembershipProvider(new IMembershipProvider[] {v1, v2, v3});
            var handlerFactory = new MessageHandlerFactory(new[] {trapv1Mapping, trapv2Mapping, informMapping});

            var pipelineFactory = new SnmpApplicationFactory(store, membership, handlerFactory);
            using (var engine = new SnmpEngine(pipelineFactory, new Listener { Users = users }, new EngineGroup()))
            {
                engine.Listener.AddBinding(new IPEndPoint(IPAddress.Any, 162));
                engine.Start();
                Console.WriteLine("#SNMP is available at http://sharpsnmplib.codeplex.com");
                Console.WriteLine("Press any key to stop . . . ");
                Console.Read();
                engine.Stop();
            }
        }

 public void TestReportFailure2()
 {
     const string data = "30780201033010020462d4a37602020578040101020103042f302d040b800000090340f4ecf2b113020124020200a4040762696c6c696e67040c62bc133ef237922dfa8ca39a04003030040b800000090340f4ecf2b1130400a81f02049d2b5c8c0201000201003011300f060a2b060106030f01010200410105";
     var bytes = ByteTool.Convert(data);
     const string userName = "billing";
     IAuthenticationProvider auth = new MD5AuthenticationProvider(new OctetString("testing345"));
     IPrivacyProvider priv = new DefaultPrivacyProvider(auth);
     var users = new UserRegistry();
     users.Add(new User(new OctetString(userName), priv));
     var messages = MessageFactory.ParseMessages(bytes, users);
     Assert.AreEqual(1, messages.Count);
     var message = messages[0];
     Assert.AreEqual(1, message.Variables().Count);
     Assert.AreEqual("not in time window", message.Variables()[0].Id.GetErrorMessage());
 }

        private void txtBytes_TextChanged(object sender, EventArgs e)
        {
            tvMessage.Nodes.Clear();
            var users = new UserRegistry();
            IAuthenticationProvider authen;
            if (tscbAuthentication.SelectedIndex == 0)
            {
                authen = DefaultAuthenticationProvider.Instance;
            }
            else if (tscbAuthentication.SelectedIndex == 1)
            {
                authen = new MD5AuthenticationProvider(new OctetString(tstxtAuthentication.Text));
            }
            else
            {
                authen = new SHA1AuthenticationProvider(new OctetString(tstxtAuthentication.Text));
            }

            IPrivacyProvider privacy;
            if (tscbPrivacy.SelectedIndex == 0)
            {
                privacy = new DefaultPrivacyProvider(authen);
            }
            else if (tscbPrivacy.SelectedIndex == 1)
            {
                privacy = new DESPrivacyProvider(new OctetString(tstxtPrivacy.Text), authen);
            }
            else
            {
                privacy = new AESPrivacyProvider(new OctetString(tstxtPrivacy.Text), authen);
            }

            users.Add(new User(new OctetString(tstxtUser.Text), privacy));

            try
            {
                var messages = MessageFactory.ParseMessages(ByteTool.Convert(txtBytes.Text.Replace("\"", null).Replace("+", null)), users);
                messages.Fill(tvMessage);
            }
            catch (Exception ex)
            {
                tvMessage.Nodes.Add(ex.Message);
            }
        }

 public void TestToBytes3()
 {
     var privacy = new DESPrivacyProvider(new OctetString("privacyphrase"), new MD5AuthenticationProvider(new OctetString("authentication")));
     var trap = new TrapV2Message(
         VersionCode.V3,
         new Header(
             new Integer32(1004947569),
             new Integer32(0x10000),
             privacy.ToSecurityLevel()),
         new SecurityParameters(
             new OctetString(ByteTool.Convert("80001F8880E9630000D61FF449")),
             Integer32.Zero,
             Integer32.Zero,
             new OctetString("lextm"),
             new OctetString(ByteTool.Convert("61A9A486AF4A861BD5C0BB1F")), 
             new OctetString(ByteTool.Convert("0000000069D39B2A"))),
         new Scope(OctetString.Empty, OctetString.Empty,
                   new TrapV2Pdu(
                       234419641,
                       new ObjectIdentifier("1.3.6"),
                       0,
                       new List<Variable>())),
         privacy, 
         null);         
     byte[] bytes = trap.ToBytes();
     UserRegistry registry = new UserRegistry();
     registry.Add(new OctetString("lextm"), privacy);
     IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
     Assert.AreEqual(1, messages.Count);
     ISnmpMessage message = messages[0];
     Assert.AreEqual("80001F8880E9630000D61FF449", message.Parameters.EngineId.ToHexString());
     Assert.AreEqual(0, message.Parameters.EngineBoots.ToInt32());
     Assert.AreEqual(0, message.Parameters.EngineTime.ToInt32());
     Assert.AreEqual("lextm", message.Parameters.UserName.ToString());
     Assert.AreEqual("61A9A486AF4A861BD5C0BB1F", message.Parameters.AuthenticationParameters.ToHexString());
     Assert.AreEqual("0000000069D39B2A", message.Parameters.PrivacyParameters.ToHexString());
     Assert.AreEqual("", message.Scope.ContextEngineId.ToHexString()); // SNMP#NET returns string.Empty here.
     Assert.AreEqual("", message.Scope.ContextName.ToHexString());
     Assert.AreEqual(0, message.Scope.Pdu.Variables.Count);
     Assert.AreEqual(1004947569, message.MessageId());
     Assert.AreEqual(234419641, message.RequestId());
 }

        public void TestReportFailure()
        {
            const string data = "30 70 02 01 03 30"+
                                "11 02 04 76 EB 6A 22 02 03 00 FF F0 04 01 01 02 01 03 04 33 30 31 04 09"+

                                "80 00 05 23 01 C1 4D BB 83 02 01 5B 02 03 1C 93 9D 04 0C 4D 44 35 5F 44"+
                                "45 53 5F 55 73 65 72 04 0C E5 C7 C5 2E 17 7E 87 62 AB 56 D6 C7 04 00 30"+
                                "23 04 00 04 00 A8 1D 02 01 00 02 01 00 02 01 00 30 12 30 10 06 0A 2B 06"+

                                "01 06 03 0F 01 01 02 00 41 02 05 EE";
            var bytes = ByteTool.Convert(data);
            const string userName = "MD5_DES_User";
            const string phrase = "AuthPassword";
            const string privatePhrase = "PrivPassword";
            IAuthenticationProvider auth = new MD5AuthenticationProvider(new OctetString(phrase));
            IPrivacyProvider priv = new DESPrivacyProvider(new OctetString(privatePhrase), auth);
            var users = new UserRegistry();
            users.Add(new User(new OctetString(userName), priv));
            var messages = MessageFactory.ParseMessages(bytes, users);
            Assert.AreEqual(1, messages.Count);
            var message = messages[0];
            Assert.AreEqual(1, message.Variables().Count);
        }

        private SnmpEngine CreateEngine()
        {
            // TODO: this is a hack. review it later.
            var store = new ObjectStore();
            store.Add(new SysDescr());
            store.Add(new SysObjectId());
            store.Add(new SysUpTime());
            store.Add(new SysContact());
            store.Add(new SysName());
            store.Add(new SysLocation());
            store.Add(new SysServices());
            store.Add(new SysORLastChange());
            store.Add(new SysORTable());
            store.Add(new IfNumber());
            store.Add(new IfTable());

            var users = new UserRegistry();
            users.Add(new OctetString("neither"), DefaultPrivacyProvider.DefaultPair);
            users.Add(new OctetString("authen"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("authentication"))));
            users.Add(new OctetString("privacy"), new DESPrivacyProvider(new OctetString("privacyphrase"),
                                                                         new MD5AuthenticationProvider(new OctetString("authentication"))));

            var getv1 = new GetV1MessageHandler();
            var getv1Mapping = new HandlerMapping("v1", "GET", getv1);

            var getv23 = new GetMessageHandler();
            var getv23Mapping = new HandlerMapping("v2,v3", "GET", getv23);

            var setv1 = new SetV1MessageHandler();
            var setv1Mapping = new HandlerMapping("v1", "SET", setv1);

            var setv23 = new SetMessageHandler();
            var setv23Mapping = new HandlerMapping("v2,v3", "SET", setv23);

            var getnextv1 = new GetNextV1MessageHandler();
            var getnextv1Mapping = new HandlerMapping("v1", "GETNEXT", getnextv1);

            var getnextv23 = new GetNextMessageHandler();
            var getnextv23Mapping = new HandlerMapping("v2,v3", "GETNEXT", getnextv23);

            var getbulk = new GetBulkMessageHandler();
            var getbulkMapping = new HandlerMapping("v2,v3", "GETBULK", getbulk);

            var v1 = new Version1MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v2 = new Version2MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v3 = new Version3MembershipProvider();
            var membership = new ComposedMembershipProvider(new IMembershipProvider[] { v1, v2, v3 });
            var handlerFactory = new MessageHandlerFactory(new[]
            {
                getv1Mapping, 
                getv23Mapping, 
                setv1Mapping,
                setv23Mapping,
                getnextv1Mapping,
                getnextv23Mapping,
                getbulkMapping
            });

            var pipelineFactory = new SnmpApplicationFactory(store, membership, handlerFactory);
            return new SnmpEngine(pipelineFactory, new Listener { Users = users }, new EngineGroup());
        }

 public void TestTrapV3Auth()
 {
     byte[] bytes = Resources.trapv3auth;
     UserRegistry registry = new UserRegistry();
     registry.Add(new OctetString("lextm"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("authentication"))));
     IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
     Assert.AreEqual(1, messages.Count);
     ISnmpMessage message = messages[0];
     Assert.AreEqual("80001F8880E9630000D61FF449", message.Parameters.EngineId.ToHexString());
     Assert.AreEqual(0, message.Parameters.EngineBoots.ToInt32());
     Assert.AreEqual(0, message.Parameters.EngineTime.ToInt32());
     Assert.AreEqual("lextm", message.Parameters.UserName.ToString());
     Assert.AreEqual("84433969457707152C289A3E", message.Parameters.AuthenticationParameters.ToHexString());
     Assert.AreEqual("", message.Parameters.PrivacyParameters.ToHexString());
     Assert.AreEqual("", message.Scope.ContextEngineId.ToHexString()); // SNMP#NET returns string.Empty here.
     Assert.AreEqual("", message.Scope.ContextName.ToHexString());
     Assert.AreEqual(318463383, message.MessageId);
     Assert.AreEqual(1276263065, message.RequestId);
 }

        public MainForm()
        {
            // TODO: this is a hack. review it later.
            var store = new ObjectStore();
            store.Add(new SysDescr());
            store.Add(new SysObjectId());
            store.Add(new SysUpTime());
            store.Add(new SysContact());
            store.Add(new SysName());
            store.Add(new SysLocation());
            store.Add(new SysServices());
            store.Add(new SysORLastChange());
            store.Add(new SysORTable());
            store.Add(new IfNumber());
            store.Add(new IfTable());

            var users = new UserRegistry();
            users.Add(new OctetString("neither"), DefaultPrivacyProvider.DefaultPair);
            users.Add(new OctetString("authen"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("authentication"))));
            users.Add(new OctetString("privacy"), new DESPrivacyProvider(new OctetString("privacyphrase"),
                                                                         new MD5AuthenticationProvider(new OctetString("authentication"))));

            var getv1 = new GetV1MessageHandler();
            var getv1Mapping = new HandlerMapping("v1", "GET", getv1);

            var getv23 = new GetMessageHandler();
            var getv23Mapping = new HandlerMapping("v2,v3", "GET", getv23);

            var setv1 = new SetV1MessageHandler();
            var setv1Mapping = new HandlerMapping("v1", "SET", setv1);

            var setv23 = new SetMessageHandler();
            var setv23Mapping = new HandlerMapping("v2,v3", "SET", setv23);
            
            var getnextv1 = new GetNextV1MessageHandler();
            var getnextv1Mapping = new HandlerMapping("v1", "GETNEXT", getnextv1);

            var getnextv23 = new GetNextMessageHandler();
            var getnextv23Mapping = new HandlerMapping("v2,v3", "GETNEXT", getnextv23);

            var getbulk = new GetBulkMessageHandler();
            var getbulkMapping = new HandlerMapping("v2,v3", "GETBULK", getbulk);
            
            var v1 = new Version1MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v2 = new Version2MembershipProvider(new OctetString("public"), new OctetString("public"));
            var v3 = new Version3MembershipProvider();
            var membership = new ComposedMembershipProvider(new IMembershipProvider[] { v1, v2, v3 });
            var handlerFactory = new MessageHandlerFactory(new[]
            {
                getv1Mapping, 
                getv23Mapping, 
                setv1Mapping,
                setv23Mapping,
                getnextv1Mapping,
                getnextv23Mapping,
                getbulkMapping
            });

            var pipelineFactory = new SnmpApplicationFactory(new RollingLogger(), store, membership, handlerFactory);
            _engine = new SnmpEngine(pipelineFactory, new Listener { Users = users }, new EngineGroup());
            _engine.ExceptionRaised += (sender, e) => MessageBox.Show(e.Exception.ToString());

            InitializeComponent();
            if (PlatformSupport.Platform == PlatformType.Windows)
            {
                // FIXME: work around a Mono WinForms issue.
                Icon = Properties.Resources.network_server;                
            }
            
            actEnabled.Image = Properties.Resources.media_playback_start;
            tstxtPort.Text = @"161";
            tscbIP.Items.Add(StrAllUnassigned);
            foreach (IPAddress address in Dns.GetHostEntry(string.Empty).AddressList.Where(address => !address.IsIPv6LinkLocal))
            {
                tscbIP.Items.Add(address);
            }

            tscbIP.SelectedIndex = 0;
        }

        /// <summary>
        /// Sends this <see cref="ISnmpMessage"/> and handles the response from agent.
        /// </summary>
        /// <param name="request">The <see cref="ISnmpMessage"/>.</param>
        /// <param name="timeout">The time-out value, in milliseconds. The default value is 0, which indicates an infinite time-out period. Specifying -1 also indicates an infinite time-out period.</param>
        /// <param name="receiver">Agent.</param>
        /// <param name="udpSocket">The UDP <see cref="Socket"/> to use to send/receive.</param>
        /// <returns></returns>
        public static ISnmpMessage GetResponse(this ISnmpMessage request, int timeout, IPEndPoint receiver, Socket udpSocket)
        {
            if (request == null)
            {
                throw new ArgumentNullException("request");
            }
            
            if (receiver == null)
            {
                throw new ArgumentNullException("receiver");
            }
            
            if (udpSocket == null)
            {
                throw new ArgumentNullException("udpSocket");
            }
            
            var registry = new UserRegistry();
            if (request.Version == VersionCode.V3)
            {
                registry.Add(request.Parameters.UserName, request.Privacy);
            }

            return request.GetResponse(timeout, receiver, registry, udpSocket);
        }

        /// <summary>
        /// Sends this <see cref="SetRequestMessage"/> and handles the response from agent.
        /// </summary>
        /// <param name="timeout">The time-out value, in milliseconds. The default value is 0, which indicates an infinite time-out period. Specifying -1 also indicates an infinite time-out period.</param>
        /// <param name="receiver">Agent.</param>
        /// <param name="socket">The UDP <see cref="Socket"/> to use to send/receive.</param>
        /// <returns></returns>
        private ISnmpMessage GetResponse(int timeout, IPEndPoint receiver, Socket socket)
        {
            if (socket == null)
            {
                throw new ArgumentNullException("socket");
            }
            
            if (receiver == null)
            {
                throw new ArgumentNullException("receiver");
            }

            UserRegistry registry = new UserRegistry();
            if (Version == VersionCode.V3)
            {
                registry.Add(Parameters.UserName, Privacy);
            }

            return MessageFactory.GetResponse(receiver, ToBytes(), MessageId, timeout, registry, socket);
        }

        public void TestGetRequestV3Auth()
        {
            const string bytes = "30 73"+
                                 "02 01  03 "+
                                 "30 0F "+
                                 "02  02 35 41 "+
                                 "02  03 00 FF E3"+
                                 "04 01 05"+
                                 "02  01 03"+
                                 "04 2E  "+
                                 "30 2C"+
                                 "04 0D  80 00 1F 88 80 E9 63 00  00 D6 1F F4  49 "+
                                 "02 01 0D  "+
                                 "02 01 57 "+
                                 "04 05 6C 65 78  6C 69 "+
                                 "04 0C  1C 6D 67 BF  B2 38 ED 63 DF 0A 05 24  "+
                                 "04 00 "+
                                 "30 2D  "+
                                 "04 0D 80 00  1F 88 80 E9 63 00 00 D6  1F F4 49 "+
                                 "04  00 "+
                                 "A0 1A 02  02 01 AF 02 01 00 02 01  00 30 0E 30  0C 06 08 2B  06 01 02 01 01 03 00 05  00";
            UserRegistry registry = new UserRegistry();
            registry.Add(new OctetString("lexli"), new DefaultPrivacyProvider(new MD5AuthenticationProvider(new OctetString("testpass"))));
            IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
            Assert.AreEqual(1, messages.Count);
            GetRequestMessage get = (GetRequestMessage)messages[0];
            Assert.AreEqual(13633, get.MessageId);
            //Assert.AreEqual(SecurityLevel.None | SecurityLevel.Reportable, get.Level);
            Assert.AreEqual("lexli", get.Community.ToString());
            //OctetString digest = new MD5AuthenticationProvider(new OctetString("testpass")).ComputeHash(get);

            //Assert.AreEqual(digest, get.Parameters.AuthenticationParameters);
        }

 public void TestGetV3()
 {
     const string bytes = "30 68 02 01  03 30 0F 02  02 6A 08 02  03 00 FF E3" +
                          "04 01 04 02  01 03 04 23  30 21 04 0D  80 00 1F 88" +
                          "80 E9 63 00  00 D6 1F F4  49 02 01 05  02 02 0F 1B" +
                          "04 05 6C 65  78 74 6D 04  00 04 00 30  2D 04 0D 80" +
                          "00 1F 88 80  E9 63 00 00  D6 1F F4 49  04 00 A0 1A" +
                          "02 02 2C 6A  02 01 00 02  01 00 30 0E  30 0C 06 08" +
                          "2B 06 01 02  01 01 03 00  05 00";
     UserRegistry registry = new UserRegistry();
     registry.Add(new OctetString("lextm"), DefaultPrivacyProvider.DefaultPair);
     IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
     Assert.AreEqual(1, messages.Count);
     GetRequestMessage get = (GetRequestMessage)messages[0];
     Assert.AreEqual(27144, get.MessageId);
     //Assert.AreEqual(SecurityLevel.None | SecurityLevel.Reportable, get.Level);
     Assert.AreEqual("lextm", get.Community.ToString());
 }

        public void TestGetRequestV3AuthPriv()
        {
            const string bytes = "30 81 80 02  01 03 30 0F  02 02 6C 99  02 03 00 FF" +
                                 "E3 04 01 07  02 01 03 04  38 30 36 04  0D 80 00 1F" +
                                 "88 80 E9 63  00 00 D6 1F  F4 49 02 01  14 02 01 35" +
                                 "04 07 6C 65  78 6D 61 72  6B 04 0C 80  50 D9 A1 E7" +
                                 "81 B6 19 80  4F 06 C0 04  08 00 00 00  01 44 2C A3" +
                                 "B5 04 30 4B  4F 10 3B 73  E1 E4 BD 91  32 1B CB 41" +
                                 "1B A1 C1 D1  1D 2D B7 84  16 CA 41 BF  B3 62 83 C4" +
                                 "29 C5 A4 BC  32 DA 2E C7  65 A5 3D 71  06 3C 5B 56" +
                                 "FB 04 A4";
            MD5AuthenticationProvider auth = new MD5AuthenticationProvider(new OctetString("testpass"));
            var registry = new UserRegistry();
            registry.Add(new OctetString("lexmark"), new DESPrivacyProvider(new OctetString("passtest"), auth));
            IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
            Assert.AreEqual(1, messages.Count);
            GetRequestMessage get = (GetRequestMessage)messages[0];
            Assert.AreEqual(27801, get.MessageId);
            //Assert.AreEqual(SecurityLevel.None | SecurityLevel.Reportable, get.Level);
            Assert.AreEqual("lexmark", get.Community.ToString());
            //OctetString digest = new MD5AuthenticationProvider(new OctetString("testpass")).ComputeHash(get);

            //Assert.AreEqual(digest, get.Parameters.AuthenticationParameters);
        }

 public void TestTrapV3AuthPriv()
 {
     // The message body generated by snmp#net is problematic.
     byte[] bytes = Resources.trapv3authpriv;
     string line = ByteTool.Convert(bytes);
     UserRegistry registry = new UserRegistry();
     registry.Add(new OctetString("lextm"), new DESPrivacyProvider(new OctetString("privacyphrase"), new MD5AuthenticationProvider(new OctetString("authentication"))));
     IList<ISnmpMessage> messages = MessageFactory.ParseMessages(bytes, registry);
     Assert.AreEqual(1, messages.Count);
     ISnmpMessage message = messages[0];
     Assert.AreEqual("80001F8880E9630000D61FF449", message.Parameters.EngineId.ToHexString());
     Assert.AreEqual(0, message.Parameters.EngineBoots.ToInt32());
     Assert.AreEqual(0, message.Parameters.EngineTime.ToInt32());
     Assert.AreEqual("lextm", message.Parameters.UserName.ToString());
     Assert.AreEqual("89D351891A55829243617F2C", message.Parameters.AuthenticationParameters.ToHexString());
     Assert.AreEqual("0000000069D39B2A", message.Parameters.PrivacyParameters.ToHexString());
     Assert.AreEqual("", message.Scope.ContextEngineId.ToHexString()); // SNMP#NET returns string.Empty here.
     Assert.AreEqual("", message.Scope.ContextName.ToHexString());
     Assert.AreEqual(0, message.Scope.Pdu.Variables.Count);
     Assert.AreEqual(1004947569, message.MessageId);
     Assert.AreEqual(234419641, message.RequestId);
 }