[SNMP4J] Unsupported security model

Gian Marco Gallo gianmarco.gallo at elaide.com
Wed Jun 23 12:01:58 CEST 2010 

  I'm trying to fully understand the pros of the snmp but for now I'm 
still moving the first steps :D
Anyway...thanks again for your help

Il 23/06/2010 11:55, Kazantsev, Andrey V. ha scritto:
> Yes, you right - in UserTarget you should use security name that is exist in USM - i.e., that you created with UsmUser. This tells what security settings to use when sending traps (you can create more than one UsmUser with different settings and use any of them in UserTarget).
>
> -----Original Message-----
> From: Gian Marco Gallo [mailto:gianmarco.gallo at elaide.com]
> Sent: Wednesday, June 23, 2010 16:47
> To: Kazantsev, Andrey V.
> Cc: snmp4j at agentpp.org
> Subject: Re: [SNMP4J] Unsupported security model
>
>    I've done this:
>
> UserTarget target = new UserTarget();
> target.setSecurityName(new OctetString("CryptoExtWeb"));
>
> Then I've done this:
>
> UsmUser user = new UsmUser(new OctetString("CryptoExtWeb"), null, null,
> null, null);
>
> In this way the code works fine and the trap is sent but if I use
> different OctetStrings this runtime exception is returned.
>
> 11:39:14,575 ERROR [STDERR] org.snmp4j.MessageException: Message
> processing model 3 returned error: Unknown security name
> 11:39:14,575 ERROR [STDERR]     at
> org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:465)
> 11:39:14,575 ERROR [STDERR]     at
> org.snmp4j.Snmp.sendMessage(Snmp.java:1067)
> 11:39:14,575 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:882)
> 11:39:14,575 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:875)
> 11:39:14,575 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:840)
> 11:39:14,575 ERROR [STDERR]     at
> com.elaide.crypto.ext.web.snmp.TrapSnmp.sendTrap(TrapSnmp.java:123)
> 11:39:14,575 ERROR [STDERR]     at
> com.elaide.crypto.ext.web.snmp.TrapSnmp.createAndSend(TrapSnmp.java:50)
> 11:39:14,575 ERROR [STDERR]     at
> com.elaide.crypto.ext.web.listeners.IndexListener.loadUserManager(IndexListener.java:47)
> 11:39:14,575 ERROR [STDERR]     at
> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 11:39:14,576 ERROR [STDERR]     at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> 11:39:14,576 ERROR [STDERR]     at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> 11:39:14,576 ERROR [STDERR]     at
> java.lang.reflect.Method.invoke(Method.java:597)
> 11:39:14,576 ERROR [STDERR]     at bsh.Reflect.invokeMethod(Unknown Source)
> 11:39:14,576 ERROR [STDERR]     at
> bsh.Reflect.invokeObjectMethod(Unknown Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.Name.invokeMethod(Unknown Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.BSHMethodInvocation.eval(Unknown
> Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.BSHPrimaryExpression.eval(Unknown
> Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.BSHPrimaryExpression.eval(Unknown
> Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.Interpreter.eval(Unknown Source)
> 11:39:14,576 ERROR [STDERR]     at bsh.Interpreter.eval(Unknown Source)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.scripting.bsh.BSHInterpreter.exec(BSHInterpreter.java:134)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.scripting.util.GenericInterpreter.interpret(GenericInterpreter.java:341)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.ui.impl.PageImpl.interpret(PageImpl.java:840)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:175)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:140)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.ui.impl.EventProcessingThreadImpl.process0(EventProcessingThreadImpl.java:517)
> 11:39:14,576 ERROR [STDERR]     at
> org.zkoss.zk.ui.impl.EventProcessingThreadImpl.run(EventProcessingThreadImpl.java:444)
>
>
> So I've deduced that the two OctetStrings must be equal.
>
>
> Il 23/06/2010 11:30, Kazantsev, Andrey V. ha scritto:
>> I'm glad to hear that I helped you.
>>
>> What user name do you mean? In fact there is only security name, which is first argument to UsmUser constructor. You use it later for adding this user to USM instance (usm.addUser(user.getSecurityName(), user)). I just called security name with "username", but it could be arbitrary string.
>>
>> -----Original Message-----
>> From: Gian Marco Gallo [mailto:gianmarco.gallo at elaide.com]
>> Sent: Wednesday, June 23, 2010 16:12
>> To: Kazantsev, Andrey V.
>> Subject: Re: [SNMP4J] Unsupported security model
>>
>>     Hello
>>
>> Thanks for your quick reply. I've tried your code and after five tries
>> it now works. In fact I didn't understand that the username and the
>> security name have to be equals (confirm?). But now it works fine.
>>
>> Thanks again for your help
>> Have a nice day
>>
>>
>> Il 23/06/2010 04:28, Kazantsev, Andrey V. ha scritto:
>>> Hello.
>>>
>>> I think you should create USM (User Security Model) and add it to your SNMP session. Consider following example:
>>>
>>> USM usm = new USM(SecurityProtocols.getInstance(), new OctetString(MPv3.createLocalEngineID()), 0);
>>> SecurityModels.getInstance().addSecurityModel(usm);
>>>
>>> Also you maybe want to add user (noAuthNoPriv):
>>> user = new UsmUser(new OctetString("username"), null, null, null, null);
>>> usm.addUser(user.getSecurityName(), user);
>>>
>>> This example code from http://www.snmp4j.org/doc/org/snmp4j/Snmp.html
>>>
>>> Also you can look at SnmpRequest.java from snmp4j-1.11.zip\snmp4j-1.11\src\org\snmp4j\tools\console\
>>>
>>> -----Original Message-----
>>> From: snmp4j-bounces at agentpp.org [mailto:snmp4j-bounces at agentpp.org] On Behalf Of Gian Marco Gallo
>>> Sent: Tuesday, June 22, 2010 21:41
>>> To: snmp4j at agentpp.org
>>> Subject: [SNMP4J] Unsupported security model
>>>
>>>      Good afternoon
>>>
>>> I am trying to send a trap message to a server listening for snmp messages but when I try to send the trap an exception is throwed:
>>> 16:20:12,817 ERROR [STDERR] org.snmp4j.MessageException: Message processing model 3 returned error: Unsupported security model
>>> 16:20:12,817 ERROR [STDERR]     at
>>> org.snmp4j.MessageDispatcherImpl.sendPdu(MessageDispatcherImpl.java:465)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> org.snmp4j.Snmp.sendMessage(Snmp.java:1067)
>>> 16:20:12,818 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:882)
>>> 16:20:12,818 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:875)
>>> 16:20:12,818 ERROR [STDERR]     at org.snmp4j.Snmp.send(Snmp.java:840)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> com.elaide.crypto.ext.web.snmp.TrapSnmp.sendTrap(TrapSnmp.java:94)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> com.elaide.crypto.ext.web.snmp.TrapSnmp.createAndSend(TrapSnmp.java:42)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> com.elaide.crypto.ext.web.listeners.IndexListener.loadUserManager(IndexListener.java:47)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> java.lang.reflect.Method.invoke(Method.java:597)
>>> 16:20:12,818 ERROR [STDERR]     at bsh.Reflect.invokeMethod(Unknown Source)
>>> 16:20:12,818 ERROR [STDERR]     at
>>> bsh.Reflect.invokeObjectMethod(Unknown Source)
>>> 16:20:12,818 ERROR [STDERR]     at bsh.Name.invokeMethod(Unknown Source)
>>> 16:20:12,818 ERROR [STDERR]     at bsh.BSHMethodInvocation.eval(Unknown
>>> Source)
>>> 16:20:12,818 ERROR [STDERR]     at bsh.BSHPrimaryExpression.eval(Unknown
>>> Source)
>>> 16:20:12,819 ERROR [STDERR]     at bsh.BSHPrimaryExpression.eval(Unknown
>>> Source)
>>> 16:20:12,819 ERROR [STDERR]     at bsh.Interpreter.eval(Unknown Source)
>>> 16:20:12,819 ERROR [STDERR]     at bsh.Interpreter.eval(Unknown Source)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.scripting.bsh.BSHInterpreter.exec(BSHInterpreter.java:134)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.scripting.util.GenericInterpreter.interpret(GenericInterpreter.java:341)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.ui.impl.PageImpl.interpret(PageImpl.java:840)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:175)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:140)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.ui.impl.EventProcessingThreadImpl.process0(EventProcessingThreadImpl.java:517)
>>> 16:20:12,819 ERROR [STDERR]     at
>>> org.zkoss.zk.ui.impl.EventProcessingThreadImpl.run(EventProcessingThreadImpl.java:444)
>>>
>>> I've searched for two days a solution in the snmp4j documentation and over internet but no luck. Do you have an idea?
>>> I'm attaching my simple snmp class.
>>>
>>> Thanks in advance
>>>
>>> --
>>> Gian Marco Gallo
>>> Elaide SRL
>>>
>>> Email: gianmarco.gallo at elaide.com
>>> Phone: +39 049 4102390
>>>
>>>
>>>
>


-- 
Gian Marco Gallo
Elaide SRL

Email: gianmarco.gallo at elaide.com
Phone: +39 049 4102390

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