View Source snmpm_network_interface behaviour (snmp v5.18)
Behaviour module for the SNMP manager network interface.
This module defines the behaviour of the manager network interface. A
snmpm_network_interface
compliant module must export the following functions:
start_link/2
stop/1
send_pdu/7
inform_response/4
note_store/2
info/1
get_log_type/1
set_log_type/2
verbosity/2
The semantics of them and their exact signatures are explained below.
Legacy API function send_pdu/7
that has got separate
IpAddr
and PortNumber
arguments still works as before for backwards
compatibility reasons.
Summary
Callbacks
The Audit Trail Log is managed by the network interface process. So, it is this process that has to return the actual log-type.
The info returned is basically up to the implementer to decide. The implementation provided by this application provides info about memory allocation and various socket information.
Instruct the network interface process to send the response (acknowledgment) to an inform-request.
Change the pid of the note-store process. This is used when the server restarts
the note-store
(e.g. after a crach).
Request the network interface process (Pid
) to send this pdu (Pdu
).
The Audit Trail Log is managed by the network interface process. So, it is this process that has to do the actual changing of the type.
Start-link the network interface process.
Stop the network interface process.
Change the verbosity of the network interface process.
Callbacks
-callback get_log_type(Pid) -> {ok, LogType} | {error, Reason} when Pid :: pid(), LogType :: snmp:atl_type(), Reason :: term().
The Audit Trail Log is managed by the network interface process. So, it is this process that has to return the actual log-type.
-callback info(Pid) -> Info when Pid :: pid(), Info :: [{Key, Value}], Key :: term(), Value :: term().
The info returned is basically up to the implementer to decide. The implementation provided by this application provides info about memory allocation and various socket information.
The info returned by this function is returned together with other info
collected by the manager when the snmpm:info()
function is called (tagged with the key net_if
).
-callback inform_response(Pid, Ref, Addr, Port) -> snmp:void() when Pid :: pid(), Ref :: term(), Addr :: inet:ip_address(), Port :: inet:port_number().
Instruct the network interface process to send the response (acknowledgment) to an inform-request.
Ref
is something that can be used to identify the inform-request, e.g.
request-id of the inform-request.
Addr
and Port
identifies the agent, from which the inform-request
originated.
Change the pid of the note-store process. This is used when the server restarts
the note-store
(e.g. after a crach).
-callback send_pdu(Pid, Pdu, Vsn, MsgData, Domain, Addr, ExtraInfo) -> snmp:void() when Pid :: pid(), Pdu :: snmp:pdu(), Vsn :: 'version-1' | 'version-2' | 'version-3', MsgData :: term(), Domain :: snmp:tdomain(), Addr :: {inet:ip_address(), inet:port_number()}, ExtraInfo :: term().
Request the network interface process (Pid
) to send this pdu (Pdu
).
ExtraInfo
is some opaque data that is passed to the net-if
process. It
originates from the ExtraInfo
parameter in the calls to the
synchronous get-request
,
asynchronous get-request
,
synchronous get-next-request
,
asynchronous get-next-request
,
synchronous set-request
and
asynchronous set-request
functions.
Whether the net-if
process chooses to use this is implementation dependent.
The net-if
process included in this application ignores it.
-callback set_log_type(Pid, NewType) -> {ok, OldType} | {error, Reason} when Pid :: pid(), NewType :: snmp:atl_type(), OldType :: snmp:atl_type(), Reason :: term().
The Audit Trail Log is managed by the network interface process. So, it is this process that has to do the actual changing of the type.
See snmpm:set_log_type/1
for more info.
-callback start_link(Server, NoteStore) -> {ok, Pid} | {error, Reason} when Server :: pid(), NoteStore :: pid(), Pid :: pid(), Reason :: term().
Start-link the network interface process.
Server
is the pid of the managing process.
NoteStore
is the pid of the note-store
process.
Stop the network interface process.
-callback verbosity(Pid, Verbosity) -> snmp:void() when Pid :: pid(), Verbosity :: snmp:verbosity().
Change the verbosity of the network interface process.