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Simple Network Management Protocol (SNMP)
Reference Manual
Version 4.16

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# snmpa_notification_filter

### MODULE

snmpa_notification_filter

### MODULE SUMMARY

Behaviour module for the SNMP agent notification filters.

### DESCRIPTION

This module defines the behaviour of the agent notification filters. A snmpa_notification_filter compliant module must export the following functions:

- handle_notification/2

The semantics of them and their exact signatures are explained below.

The purpose of notification filters is to allow for modification and/or suppression of a notification.

A misbehaving filter will be removed.

### EXPORTS

handle_notification(Notif, Data) -> Reply

Types:

Reply = send | {send, NewNotif} | dont_send
Notif = NewNotif = notification() | trap()
Data = term()

Handle a notification to be sent. The filter can either accept the notification as is, return send, modify the notification, return {send, NewNotif} or suppress the notification, return dont_send.

Data is supplied at filter registration time, see register_notification_filter.