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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2013. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%
-module(snmpa_mib_data).
-include_lib("snmp/include/snmp_types.hrl").
%%%-----------------------------------------------------------------
%%% This is the behaviour for the MIB server backend internal
%%% data storage.
%%%-----------------------------------------------------------------
%% These types should really be defined elsewhere...
-export_type([
mib_storage/0,
mib_storage_opt/0,
mib_storage_module/0,
mib_storage_options/0,
mib_view/0,
mib_view_elem/0,
mib_view_mask/0,
mib_view_inclusion/0
]).
-type mib_storage() :: [mib_storage_opt()].
-type mib_storage_opt() :: {module, mib_storage_module()} |
{options, mib_storage_options()}.
%% Module implementing the snmpa_mib_storage behaviour
-type mib_storage_module() :: atom().
%% Options specific to the above module
-type mib_storage_options() :: list().
-type mib_view() :: [mib_view_elem()].
-type mib_view_elem() :: {SubTree :: snmp:oid(),
Mask :: [non_neg_integer()],
Inclusion :: mib_view_inclusion()}.
-type mib_view_mask() :: [non_neg_integer()].
-type mib_view_inclusion() :: 1 | 2. % 1 = included, 2 = excluded
-type filename() :: file:filename().
-callback new(MibStorage :: mib_storage()) -> State :: term().
-callback close(State :: term()) -> ok.
-callback sync(State :: term()) -> ok.
-callback load_mib(State :: term(), FileName :: string(),
MeOverride :: boolean(),
TeOverride :: boolean()) ->
{ok, NewState :: term()} | {error, Reason :: already_loaded | term()}.
-callback unload_mib(State :: term(), FileName :: string(),
MeOverride :: boolean(),
TeOverride :: boolean()) ->
{ok, NewState :: term()} | {error, Reason :: not_loaded | term()}.
-callback lookup(State :: term(), Oid :: snmp:oid()) ->
{false, Reason :: term()} |
{variable, MibEntry :: snmpa:me()} |
{table_column, MibEntry :: snmpa:me(), TableEntryOid :: snmp:oid()} |
{subagent, SubAgentPid :: pid(), SAOid :: snmp:oid()}.
-callback next(State :: term(), Oid :: snmp:oid(), MibView :: mib_view()) ->
endOfView | false |
{subagent, SubAgentPid :: pid(), SAOid :: snmp:oid()} |
{variable, MibEntry :: snmpa:me(), VarOid :: snmp:oid()} |
{table, TableOid :: snmp:oid(), TableRestOid :: snmp:oid(), MibEntry :: snmpa:me()}.
-callback register_subagent(State :: term(),
Oid :: snmp:oid(),
Pid :: pid()) ->
{ok, NewState :: term()} | {error, Reason :: term()}.
-callback unregister_subagent(State :: term(),
PidOrOid :: pid() | snmp:oid()) ->
{ok, NewState :: term()} | % When second arg was a pid()
{ok, NewState :: term(), Pid :: pid()} | % When second arg was a oid()
{error, Reason :: term()}.
-callback dump(State :: term(), Destination :: io | filename()) ->
ok | {error, Reason :: term()}.
-callback which_mib(State :: term(), Oid :: snmp:oid()) ->
{ok, Mib :: string()} | {error, Reason :: term()}.
-callback which_mibs(State :: term()) ->
[{MibName :: atom(), Filename :: string()}].
-callback whereis_mib(State :: term(), MibName :: atom()) ->
{ok, Filename :: string()} | {error, Reason :: term()}.
-callback info(State :: term()) -> list().
-callback backup(State :: term(), BackupDir :: string()) ->
ok | {error, Reason :: term()}.
-callback code_change(Direction :: up | down,
Vsn :: term(),
Extra :: term(),
State :: term()) ->
NewState :: term().
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