[SNMP4J] Community String has to be equal to security name, is this supposed behavior?

[Frank Fock]

Hi Guang,

SNMP4J-Agent 1.1 RC2 is now available for download,
which fixes this and other bugs related to SNMP version
coexistence.

Best regards,
Frank

Frank Fock wrote:
> Hi Guang,
> 
> This is apparently a bug. I will provide a patch for it
> later today.
> 
> Best regards,
> Frank
> 
> Guang Yang wrote:
>> Dear Friends,
>>
>>  
>>
>> I am recently using SNMP4J Agent.
>> As we know actually SNMP4J using v3 mechanism to simulate v1/v2
>> community behavior, thus a community will be mapped with a security
>> name, which is full complied with SNMP-COMMUNITY-MIB.
>>
>>  
>>
>> Just found an interesting issue. That is, in case the community String
>> does not equals to Security Name everything will be confusing.
>> To be more detail:
>>
>>  
>>
>> I created a security named "mysecurity" by
>>
>> *          vacm.addAccess
>>
>> *          vacmMib.addGroup()
>>
>>  
>>
>> Tried to map it with a specified community String by operation of
>>  
>>
>>         Variable[] com2secReadOnly = new Variable[] {
>>
>>              new OctetString("mycommunity"), // community
>>
>>                 // name
>>
>>                 new OctetString("mysecurity"), //  security
>>
>>                 // name
>>
>>                 getAgent().getContextEngineID(), // local engine ID
>>
>>                 new OctetString(WlcsSnmpConfiguration.getInstance()
>>
>>                         .getContext()), // default context name
>>
>>                 new OctetString(), // transport tag
>>
>>                 new Integer32(StorageType.nonVolatile), // storage type
>>
>>                 new Integer32(RowStatus.active) // row status
>>
>>         };
>>
>>  
>>
>>         communityMIB.getSnmpCommunityEntry().addRow(
>>
>>              communityMIB.getSnmpCommunityEntry().createRow(
>>
>>                         new
>> OctetString("readonlySec2ReadCom").toSubIndex(true), com2secReadOnly));
>> //this name is not important, right?
>>
>>  
>>
>> SNMP does not response. This shall be nothing to do with wrong
>> community, for I get following statement on console if I test with wrong
>> community
>>
>> *          "Community name "wrongcommunity" not found in
>> SNMP-COMMUNITY-MIB"
>>
>>  
>>
>> But mycommunity does not have this report.
>>
>>  
>>
>> However, when I create a security named "mycommunity" with SAME API, and
>> change code like this,
>>
>>         Variable[] com2secReadOnly = new Variable[] {
>>
>>              new OctetString("mycommunity"), // community
>>
>>                 // name
>>
>>                 new OctetString("mycommunity"),   //  security
>>
>>                 // name
>>
>>  
>>
>> It works without any problem...
>>
>> Therefore...I am a bit confused.
>>  
>>
>> I will be very appreciated if there is any expert could provide me a
>> hint. Although this workaround works fine I still would like to know, is
>> this a supposed behavior?
>>
>>  
>>
>> With best regards,
>>
>> Yang Guang.
>>
>> Guang Yang (Grant)
>>
>> ----------------------------------------
>> BEA Telecommunication Technique Center
>> Software Engineer
>> ----------------------------------------
>>
>>  
>>
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> 

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