Behaviour module for the SNMP agent notification filters.

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


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.


handle_notification(Notif, Data) -> Reply

  • 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.