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);
}
/// <summary>
/// Initializes a new instance of the <see cref="SnmpContextBase"/> class.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="sender">The sender.</param>
/// <param name="users">The users.</param>
/// <param name="group">The engine core group.</param>
/// <param name="binding">The binding.</param>
protected SnmpContextBase(ISnmpMessage request, IPEndPoint sender, UserRegistry users, EngineGroup group, IListenerBinding binding)
{
Request = request;
Binding = binding;
Users = users;
Sender = sender;
CreatedTime = DateTime.Now;
Group = group;
}
/// <summary>
/// Creates the specified request.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="sender">The sender.</param>
/// <param name="users">The users.</param>
/// <param name="group">The engine group.</param>
/// <param name="binding">The binding.</param>
/// <returns></returns>
public static SnmpContext Create(ISnmpMessage request, IPEndPoint sender, UserRegistry users, EngineGroup group, IListenerBinding binding)
{
if (request.Version == VersionCode.V3)
{
return new SecureSnmpContext(request, sender, users, group, binding);
}
return new NormalSnmpContext(request, sender, users, binding);
}
/// <summary>
/// Creates <see cref="ISnmpMessage"/> instances from a string.
/// </summary>
/// <param name="bytes">Byte string.</param>
/// <param name="registry">The registry.</param>
/// <returns></returns>
public static IList<ISnmpMessage> ParseMessages(IEnumerable<char> bytes, UserRegistry registry)
{
if (bytes == null)
{
throw new ArgumentNullException("bytes");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
return ParseMessages(ByteTool.Convert(bytes), registry);
}
/// <summary>
/// Creates <see cref="ISnmpMessage"/> instances from buffer.
/// </summary>
/// <param name="buffer">Buffer.</param>
/// <param name="registry">The registry.</param>
/// <returns></returns>
public static IList<ISnmpMessage> ParseMessages(byte[] buffer, UserRegistry registry)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
return ParseMessages(buffer, 0, buffer.Length, registry);
}
public void TestReportFailure2()
{
const string data = "30780201033010020462d4a37602020578040101020103042f302d040b800000090340f4ecf2b113020124020200a4040762696c6c696e67040c62bc133ef237922dfa8ca39a04003030040b800000090340f4ecf2b1130400a81f02049d2b5c8c0201000201003011300f060a2b060106030f01010200410105";
var bytes = ByteTool.Convert(data);
const string userName = "******";
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 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 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 = "******";
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);
}
public SecureAgentProfile(Guid id, VersionCode version, IPEndPoint agent, string agentName, string authenticationPassphrase, string privacyPassphrase, int authenticationMethod, int privacyMethod, string userName, int timeout)
: base(id, version, agent, agentName, userName, timeout)
{
AuthenticationPassphrase = authenticationPassphrase;
PrivacyPassphrase = privacyPassphrase;
AuthenticationMethod = authenticationMethod;
PrivacyMethod = privacyMethod;
switch (AuthenticationMethod)
{
case 0:
_auth = DefaultAuthenticationProvider.Instance;
break;
case 1:
_auth = new MD5AuthenticationProvider(new OctetString(AuthenticationPassphrase));
break;
case 2:
_auth = new SHA1AuthenticationProvider(new OctetString(AuthenticationPassphrase));
break;
}
switch (PrivacyMethod)
{
case 0:
_privacy = new DefaultPrivacyProvider(_auth);
break;
case 1:
_privacy = new DESPrivacyProvider(new OctetString(PrivacyPassphrase), _auth);
break;
case 2:
_privacy = new AESPrivacyProvider(new OctetString(PrivacyPassphrase), _auth);
break;
}
_registry = new UserRegistry().Add(new OctetString(userName), _privacy);
}
public SnmpMessageAsyncResult(IAsyncResult inner, Socket socket, UserRegistry users, IPEndPoint receiver, byte[] buffer)
{
_buffer = buffer;
WorkSocket = socket;
Users = users;
Receiver = receiver;
Inner = inner;
}
/// <summary>
/// Initializes a new instance of the <see cref="SecureSnmpContext"/> class.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="sender">The sender.</param>
/// <param name="users">The users.</param>
/// <param name="group">The engine core group.</param>
/// <param name="binding">The binding.</param>
public SecureSnmpContext(ISnmpMessage request, IPEndPoint sender, UserRegistry users, EngineGroup group, IListenerBinding binding)
: base(request, sender, users, group, binding)
{
}
/// <summary>
/// Sends an <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>
/// <param name="registry">The user registry.</param>
/// <returns></returns>
public static ISnmpMessage GetResponse(this ISnmpMessage request, int timeout, IPEndPoint receiver, UserRegistry registry, Socket udpSocket)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (udpSocket == null)
{
throw new ArgumentNullException("udpSocket");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
var requestCode = request.TypeCode();
if (requestCode == SnmpType.TrapV1Pdu || requestCode == SnmpType.TrapV2Pdu || requestCode == SnmpType.ReportPdu)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "not a request message: {0}", requestCode));
}
var bytes = request.ToBytes();
#if CF
int bufSize = 8192;
#else
var bufSize = udpSocket.ReceiveBufferSize;
#endif
var reply = new byte[bufSize];
// Whatever you change, try to keep the Send and the Receive close to each other.
udpSocket.SendTo(bytes, receiver);
#if !CF
udpSocket.ReceiveTimeout = timeout;
#endif
int count;
try
{
count = udpSocket.Receive(reply, 0, bufSize, SocketFlags.None);
}
catch (SocketException ex)
{
// FIXME: If you use a Mono build without the fix for this issue (https://bugzilla.novell.com/show_bug.cgi?id=599488), please uncomment this code.
/*
if (SnmpMessageExtension.IsRunningOnMono && ex.ErrorCode == 10035)
{
throw TimeoutException.Create(receiver.Address, timeout);
}
// */
if (ex.ErrorCode == WSAETIMEDOUT)
{
throw TimeoutException.Create(receiver.Address, timeout);
}
throw;
}
// Passing 'count' is not necessary because ParseMessages should ignore it, but it offer extra safety (and would avoid an issue if parsing >1 response).
var response = MessageFactory.ParseMessages(reply, 0, count, registry)[0];
var responseCode = response.TypeCode();
if (responseCode == SnmpType.ResponsePdu || responseCode == SnmpType.ReportPdu)
{
var requestId = request.MessageId();
var responseId = response.MessageId();
if (responseId != requestId)
{
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response sequence: expected {0}, received {1}", requestId, responseId), receiver.Address);
}
return response;
}
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response type: {0}", responseCode), receiver.Address);
}
/// <summary>
/// Begins to asynchronously send an <see cref="ISnmpMessage"/> to an <see cref="IPEndPoint"/>.
/// </summary>
/// <param name="request">The <see cref="ISnmpMessage"/>.</param>
/// <param name="receiver">Agent.</param>
/// <param name="registry">The user registry.</param>
/// <param name="udpSocket">The UDP <see cref="Socket"/> to use to send/receive.</param>
/// <param name="callback">The callback.</param>
/// <param name="state">The state object.</param>
/// <returns></returns>
public static IAsyncResult BeginGetResponse(this ISnmpMessage request, IPEndPoint receiver, UserRegistry registry, Socket udpSocket, AsyncCallback callback, object state)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
if (udpSocket == null)
{
throw new ArgumentNullException("udpSocket");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
var requestCode = request.TypeCode();
if (requestCode == SnmpType.TrapV1Pdu || requestCode == SnmpType.TrapV2Pdu || requestCode == SnmpType.ReportPdu)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "not a request message: {0}", requestCode));
}
// Whatever you change, try to keep the Send and the Receive close to each other.
udpSocket.SendTo(request.ToBytes(), receiver);
#if CF
var bufferSize = 8192;
#else
var bufferSize = udpSocket.ReceiveBufferSize;
#endif
var buffer = new byte[bufferSize];
// http://sharpsnmplib.codeplex.com/workitem/7234
if (callback != null)
{
AsyncCallback wrapped = callback;
callback = asyncResult =>
{
var result = new SnmpMessageAsyncResult(asyncResult, udpSocket, registry, receiver, buffer);
wrapped(result);
};
}
var ar = udpSocket.BeginReceive(buffer, 0, bufferSize, SocketFlags.None, callback, state);
return new SnmpMessageAsyncResult(ar, udpSocket, registry, receiver, buffer);
}
/// <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);
}
/// <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 an SNMP message and wait for its responses.
/// </summary>
/// <param name="receiver">The IP address and port of the target to talk to.</param>
/// <param name="bytes">The byte array representing the SNMP message.</param>
/// <param name="number">The <see cref="ResponseMessage.MessageId"/> of the SNMP message.</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="registry">The registry.</param>
/// <param name="socket">The UDP <see cref="Socket"/> to use to send/receive.</param>
/// <returns>
/// The response message (<see cref="ISnmpMessage"/>).
/// </returns>
/// <exception cref="TimeoutException">Timeout happens.</exception>
internal static ISnmpMessage GetResponse(IPEndPoint receiver, byte[] bytes, int number, int timeout, UserRegistry registry, Socket socket)
{
if (bytes == null)
{
throw new ArgumentNullException("bytes");
}
if (registry == null)
{
throw new ArgumentNullException("registry");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
if (socket == null)
{
throw new ArgumentNullException("socket");
}
#if CF
int bufSize = 8192;
#else
int bufSize = socket.ReceiveBufferSize;
#endif
byte[] reply = new byte[bufSize];
// Whatever you change, try to keep the Send and the Receive close to each other.
#if ! SILVERLIGHT //mc++
socket.SendTo(bytes, receiver);
#endif //mc++
#if ! SILVERLIGHT //mc++
#if !(CF)
socket.ReceiveTimeout = timeout;
#endif
#endif // mc++
int count = 0; //mc++
try
{
#if ! SILVERLIGHT //mc++
count = socket.Receive(reply, 0, bufSize, SocketFlags.None);
#endif
}
catch (SocketException ex)
{
// FIXME: If you use a Mono build without the fix for this bug (https://bugzilla.novell.com/show_bug.cgi?id=599488), please uncomment this code.
//if (SnmpMessageExtension.IsRunningOnMono && ex.ErrorCode == 10035)
//{
// throw TimeoutException.Create(receiver.Address, timeout);
//}
if (ex.ErrorCode == WSAETIMEDOUT)
{
throw TimeoutException.Create(receiver.Address, timeout);
}
throw;
}
// Passing 'count' is not necessary because ParseMessages should ignore it, but it offer extra safety (and would avoid a bug if parsing >1 response).
ISnmpMessage message = ParseMessages(reply, 0, count, registry)[0];
var code = message.Pdu.TypeCode;
if (code == SnmpType.ResponsePdu || code == SnmpType.ReportPdu)
{
var id = message.MessageId;
if (id != number)
{
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response sequence: expected {0}, received {1}", number, id), receiver.Address);
}
return message;
}
throw OperationException.Create(string.Format(CultureInfo.InvariantCulture, "wrong response type: {0}", code), receiver.Address);
}
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);
}
/// <summary>
/// Creates <see cref="ISnmpMessage"/> instances from buffer.
/// </summary>
/// <param name="buffer">Buffer.</param>
/// <param name="index">The index.</param>
/// <param name="length">The length.</param>
/// <param name="registry">The registry.</param>
/// <returns></returns>
public static IList<ISnmpMessage> ParseMessages(byte[] buffer, int index, int length, UserRegistry registry)
{
if (registry == null)
{
throw new ArgumentNullException("registry");
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
IList<ISnmpMessage> result = new List<ISnmpMessage>();
using (Stream stream = new MemoryStream(buffer, index, length, false))
{
int first;
while ((first = stream.ReadByte()) != -1)
{
ISnmpMessage message = ParseMessage(first, stream, registry);
if (message == null)
{
continue;
}
result.Add(message);
}
}
return result;
}
private static ISnmpMessage ParseMessage(int first, Stream stream, UserRegistry registry)
{
ISnmpData array = DataFactory.CreateSnmpData(first, stream);
if (array == null)
{
return null;
}
if (array.TypeCode != SnmpType.Sequence)
{
throw new SnmpException("not an SNMP message");
}
Sequence body = (Sequence)array;
if (body.Count != 3 && body.Count != 4)
{
throw new SnmpException("not an SNMP message");
}
VersionCode version = (VersionCode)((Integer32)body[0]).ToInt32();
Header header;
SecurityParameters parameters;
IPrivacyProvider privacy;
Scope scope;
if (body.Count == 3)
{
header = Header.Empty;
parameters = new SecurityParameters(null, null, null, (OctetString)body[1], null, null);
privacy = DefaultPrivacyProvider.DefaultPair;
scope = new Scope((ISnmpPdu)body[2]);
}
else
{
header = new Header(body[1]);
parameters = new SecurityParameters((OctetString)body[2]);
privacy = registry.Find(parameters.UserName);
if (privacy == null)
{
// handle decryption exception.
return new MalformedMessage(header.MessageId, parameters.UserName);
}
var code = body[3].TypeCode;
if (code == SnmpType.Sequence)
{
// v3 not encrypted
scope = new Scope((Sequence)body[3]);
}
else if (code == SnmpType.OctetString)
{
// v3 encrypted
try
{
scope = new Scope((Sequence)privacy.Decrypt(body[3], parameters));
}
catch (DecryptionException)
{
// handle decryption exception.
return new MalformedMessage(header.MessageId, parameters.UserName);
}
}
else
{
throw new SnmpException(string.Format(CultureInfo.InvariantCulture, "invalid v3 packets scoped data: {0}", code));
}
if (!privacy.AuthenticationProvider.VerifyHash(version, header, parameters, body[3], privacy))
{
throw new SnmpException("invalid v3 packet data");
}
}
var scopeCode = scope.Pdu.TypeCode;
switch (scopeCode)
{
case SnmpType.TrapV1Pdu:
return new TrapV1Message(body);
case SnmpType.TrapV2Pdu:
return new TrapV2Message(version, header, parameters, scope, privacy);
case SnmpType.GetRequestPdu:
return new GetRequestMessage(version, header, parameters, scope, privacy);
case SnmpType.ResponsePdu:
return new ResponseMessage(version, header, parameters, scope, privacy, false);
case SnmpType.SetRequestPdu:
return new SetRequestMessage(version, header, parameters, scope, privacy);
case SnmpType.GetNextRequestPdu:
return new GetNextRequestMessage(version, header, parameters, scope, privacy);
case SnmpType.GetBulkRequestPdu:
return new GetBulkRequestMessage(version, header, parameters, scope, privacy);
case SnmpType.ReportPdu:
return new ReportMessage(version, header, parameters, scope, privacy);
case SnmpType.InformRequestPdu:
return new InformRequestMessage(version, header, parameters, scope, privacy);
default:
throw new SnmpException(string.Format(CultureInfo.InvariantCulture, "unsupported pdu: {0}", scopeCode));
}
}
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 TestTimeOutAsync()
{
// IMPORTANT: this test case requires a local SNMP agent such as
// #SNMP Agent (snmpd),
// Windows SNMP agent service,
// Net-SNMP agent, or
// snmp4j agent.
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
GetRequestMessage message = new GetRequestMessage(0x4bed, VersionCode.V2, new OctetString("public"), new List<Variable> { new Variable(new ObjectIdentifier("1.3.6.1.2.1.1.1.0")) });
var users = new UserRegistry();
var ar2 = message.BeginGetResponse(new IPEndPoint(IPAddress.Loopback, 161), users, socket, null, null);
var response = message.EndGetResponse(ar2);
Assert.AreEqual(SnmpType.ResponsePdu, response.TypeCode());
}
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);
}
/// <summary>
/// Initializes a new instance of the <see cref="ListenerBinding"/> class.
/// </summary>
/// <param name="users">The users.</param>
/// <param name="adapters">The adapters.</param>
/// <param name="endpoint">The endpoint.</param>
public ListenerBinding(UserRegistry users, IEnumerable<IListenerAdapter> adapters, IPEndPoint endpoint)
{
_users = users;
Endpoint = endpoint;
_adapters = adapters;
}
/// <summary>
/// Initializes a new instance of the <see cref="NormalSnmpContext"/> class.
/// </summary>
/// <param name="request">The request.</param>
/// <param name="sender">The sender.</param>
/// <param name="users">The users.</param>
/// <param name="binding">The binding.</param>
public NormalSnmpContext(ISnmpMessage request, IPEndPoint sender, UserRegistry users, IListenerBinding binding)
: base(request, sender, users, null, binding)
{
}
/// <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">Port number.</param>
/// <param name="registry">User registry.</param>
/// <returns></returns>
public static ISnmpMessage GetResponse(this ISnmpMessage request, int timeout, IPEndPoint receiver, UserRegistry registry)
{
// TODO: make more usage of UserRegistry.
if (request == null)
{
throw new ArgumentNullException("request");
}
if (receiver == null)
{
throw new ArgumentNullException("receiver");
}
var code = request.TypeCode();
if (code == SnmpType.TrapV1Pdu || code == SnmpType.TrapV2Pdu || code == SnmpType.ReportPdu)
{
throw new InvalidOperationException(string.Format(CultureInfo.InvariantCulture, "not a request message: {0}", code));
}
using (var socket = receiver.GetSocket())
{
return request.GetResponse(timeout, receiver, registry, socket);
}
}
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>
/// Initializes a new instance of the <see cref="ListenerBinding"/> class.
/// </summary>
/// <param name="users">The users.</param>
/// <param name="endpoint">The endpoint.</param>
public ListenerBinding(UserRegistry users, IPEndPoint endpoint)
{
_users = users;
Endpoint = endpoint;
}
