How do I deregister a handler/scalar in my subagent?

Greetings,


We have written a subagent based on snmpd_5.4.3-dfsg-2+squeeze1_xxx.deb on both i386 and armel systems.


We are having a problem that appears to be caused by the order in which we register handlers using:

    netsnmp_handler_registration* reginfo =
            netsnmp_create_handler_registration(name,
                                                generic_snmp_access_method,
                                                (oid*)snmpOid.getOid(),
                                                snmpOid.getLength(),
                                                accessLevel);
    reginfo->handler->myvoid = NULL;
    netsnmp_register_scalar(reginfo);

If the order of calls is wrong, then we cannot snmpwalk the entire tree. We believe that there may be a bug in 5.4.3 that doesn't properly track the correct MODE_GETNEXT entry. We do not experience the issue on 5.7.2 for example.

The trouble is that we do not know apriori which handlers will be available at runtime, so we register them only as they become available.

Our hope is to work around the issue by keeping track of which handlers are available and then deregistering and reregistering handlers as necessary so that we can ensure that we can walk the entire tree.

What I need to know is the names of the functions that I can use to reverse netsnmp_register_scalar(), and netsnmp_create_handler_registration()? A netsnmp_deregister_scalar() and netsnmp_destroy_handler_registration() if you will.

Peter.

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