I'm developing a V4 driver for printer that connects via TCP/IP port. I need to access snmp data from the printer, but am having trouble extending the BiDi to our custom data.
From the V4 printer extension app, within a IPrinterRequestEvent, I have successfully gotten the IPrinterQueue interface and sent queries using IPrinterQueue::SendBiDiQuery().
I successfully receive responses through an IPrinterQueueEvent connected to a IConnectionPoint from IPrinterQueue. Built-in queries, like "\Printer.DeviceInfo.NetworkingInfo:PresentationUrl" return valid results. However, queries on
my custom properties defined in the xml bidi file all return <BIDI_NULL> responses.
If I query for all printer properties with "\Printer" query, I do get response for all the built-in and my custom properties, so I know the bidi xml file is being processed, but again all the custom properties come back <BIDI_NULL>
I know the properties are not null, because I can successfully access them from the same application using an SNMP api that we developed previously.
Below is the Bidi-Spm.xml file contents that we have to extend the Printer properties.
This file defines these queries:
\Printer\Extension\System\Custom:AgentDescription
\Printer\Extension\System\ProcessColorants
BiDi-Smp.xml file:
<?xml version="1.0"?>
<bidi:Schema xmlns:bidi="http://schemas.microsoft.com/windows/2005/03/printing/bidi">
<Property name='Printer'>
<!-- Add IHV Extensions to the \Printer section fo the Bidi Schema here --
<Property name="Extension">
<Property name="System">
<Property name="Custom">
<Value name="AgentDescription" type="BIDI_STRING" oid="1.3.6.1.2.1.1.1.0" deviceIndex="false"/>
<Value name="ProcessColorants" type="BIDI_INT" oid="1.3.6.1.2.1.43.10.2.1.6.1.1" deviceIndex="false"/>
</Property>
</Property>
</Property>
</Property>
</bidi:Schema>
What is wrong with this? Is there anything else I need to do to hook up the snmp queries? Thanks for your help.
