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

[Frank Fock]

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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