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Implementing a Filter

A Filter authenticates incoming requests. It is an ECOM plug-in loaded by the PTP-IP Controller process. This section describes how to implement a Filter.

Procedure

implement the MPTPIPHostFilter::Accept() function.

The filter examines the parameters such as Host GUID and Host Friendly Name from PTP-IP Controller process to filter the requests.
```
void Accept ( 
                  const TDesC& aHostFriendlyName,
                  TDesC8& aHostGUID,
                  TRequestStatus& aStatus);
```
You must include the ptpipfilterapi.lib and cptpiphostfilter.h files.

Note: A filter can also be used to invoke a dialog box to accept or reject an incoming request.

Parent topic: MTP PTP-IP Transport Tutorials

Related concepts

MTP over PTP-IP Overview

Using PTP-IP Controller

Implementing a Listener