[AGENT++] nonVolatile entries in usmUserTable

[Frank Fock]

Hi Dave,

the hardcode "2" can also be changed to "3" programmatically by 
assigning the
"3" to the usmUserStorageType column after the row has been created.

I will try to reproduce the problem with restoring the USM users. It could
be specific to the windows agent. Generally it highly depends on the 
initialization
order. I will post here any results.

Best regards,
Frank



Dave White | Networking wrote:

>I'm having problems with non-volatile entries in the usmUserTable.  I want
>user entries to be persistent between restarts of the daemon that I'm running
>in a Windows environment.  In my code startup, if the usmUserTable is empty
>during initialization, then I create some v3 user entries by calling
>UsmUserTable::addNewRow().  The first thing that I discovered was that I had
>to change the code in v3_mib.cpp which is hard-coded to volatile(2) (line
>#816 in v.3.5.21).  I temporarily changed it to nonVolatile(3) for my
>testing.  The first time through, my code creates some v3 users.  Then I stop
>and restart the daemon.  The second time through, usmUserTable is initialized
>with data previously saved to a persistence file.  The second time through,
>however, the v3 user which worked correctly before could no longer access MIB
>objects after I restarted.  It seems that I have to explicitly call
>addNewRow() at each startup to fully restore the user.  This defeats the
>purpose of having a nonVolatile entry in the usmUserTable.
>
>Has anyone had experience with this?
>
>Are there reasons that the code is hard-coded to create volatile entries in
>the usmUserTable?
>
>Will a persistent entry in usmUserTable properly restore everything that is
>necessary to enable a v3 user to read and/or write MIB entries if someone
>were to add a nonVolatile entry into the usmUserTable via SNMP, restart the
>daemon, and attempt to use the v3 user name?
>
>Any help or suggestions are appreciated.
>
>Thanks,
>Dave
>
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