cupsDoRequest changes request->request.op.operation_id

[Jardel Weyrich]

Hi there.

I'm writing an application that uses IPP_GET_NOTIFICATIONS to get the events on a given subscription id.

The problem occurs here:

ipp_t *request = ippNewRequest(IPP_GET_NOTIFICATIONS);
...append the attributes...
printf("id = %d\n", request->request.op.operation_id);
ipp_t *response = cupsDoRequest(m_http, request, resource);
printf("id = %d\n", request->request.op.operation_id);

The output is:
id = 28
id = 3

For some reason, the cupsDoRequest() is internally changing the operation_id. Maybe,
I suppose it's an error, isn't it? Please, explain me.

Thank you in advance,
Jardel