snmpa_notification_filter(3erl) Erlang Module Definition snmpa_notification_filter(3erl)NAME
snmpa_notification_filter - 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 .
Ericsson AB snmp 4.19 snmpa_notification_filter(3erl)
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snmpa_discovery_handler(3erl) Erlang Module Definition snmpa_discovery_handler(3erl)NAME
snmpa_discovery_handler - Behaviour module for the SNMP agent discovery handler.
DESCRIPTION
This module defines the behaviour of the agent discovery handler. A snmpa_discovery_handler compliant module must export the following
functions:
* stage1_finish/2
The semantics of them and their exact signatures are explained below.
EXPORTS
stage1_finish(TargetName, ManagerEngineID, ExtraInfo) -> ignore | {ok, usm_entry() | [usm_entry()]} | {ok, usm_entry() | [usm_entry()],
NewExtraInfo}
Types TargetName = string()
ManagerEngineID = string()
ExtraInfo = term()
usm_entry() = tuple() compatible with usm.conf
NewExtraInfo = term()
This function is called at the end of stage 1 of the discovery process. It should return either the atom ignore or {ok, usm_entry()
| [usm_entry()]} . See usm_entry() and usm_entry/13 for more info.
If the function returns ignore , then it is assumed that either:
* The caller (of the discovery function) will make the needed updates later.
* The callback function itself did the updates.
In either case, the agent will do nothing, but return the retrieved ManagerEngineID (see discovery for more info) and possible con-
tinue with stage 2 of the discovery process.
The ExtraInfo argument is passed on from the discovery function.
This function may return an updated NewExtraInfo that will be used in subsequent calls to the callback functions. Intended for
future use.
The purpose of this function is to generate the usm- related security data needed for usm processing in the agent. Specifically,
updating the usmUserTable.
When an usm_entry() tuple (or a list of such tuples) is returned, this data is then added to the usmUserTable by the (master-)
agent.
When an usm_entry() tuple (or a list of such tuples) is returned, this data is then added to the usmUserTable by the (master-)
agent.
Note:
Note that the function does not check if this entry already exists.
Note:
Note that this function is executed in the context of the master-agent process.
Ericsson AB snmp 4.19 snmpa_discovery_handler(3erl)
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