NEBCALLBACK_SERVICE_STATUS_DATA callback being invoked twice

[Andreas Ericsson]

James King wrote:
> Hello all,
> 
> I'm attempting to write a NEB module that will enable forwarding of
> service state transitions to another NMS platform.  I'm registering
> for NEBCALLBACK_SERVICE_STATUS_DATA, but my callback is being invoked
> twice for each status update, with identical timestamp, type code and
> identical current_state and last_state in the (service *)
> (data->object_ptr).  There's only a single event type associated with
> this hook (NEBTYPE_SERVICESTATUS_UPDATE).  Is this normal behavior for
> this hook (and if so, what is the reasoning behind this, or is there
> at least a difference between the 2 invocations that I can use to
> filter on)?

Here's how Merlin does it. Note the first check there, making sure that
if (ds->type != NEBTYPE_SERVICECHECK_PROCESSED), it returns immediately.

--8<--8<--8<--
int hook_service_result(int cb, void *data)
{
    nebstruct_service_check_data *ds = (nebstruct_service_check_data *)data;
    char buf[MAX_PKT_SIZE];
    int len, result;

    if (ds->type != NEBTYPE_SERVICECHECK_PROCESSED
        || ds->check_type != SERVICE_CHECK_ACTIVE
        || cb != NEBCALLBACK_SERVICE_CHECK_DATA)
    {
        return 0;
    }
--8<--8<--8<--

-- 
Andreas Ericsson                   andreas.ericsson at op5.se
OP5 AB                             www.op5.se
Tel: +46 8-230225                  Fax: +46 8-230231

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