%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2015. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(snmp_standard_mib).
%%%-----------------------------------------------------------------
%%% This module implements the configure- and reinit-functions
%%% for the STANDARD-MIB and SNMPv2-MIB.
%%%-----------------------------------------------------------------
-include("snmp_types.hrl").
-include("STANDARD-MIB.hrl").
-define(VMODULE,"STANDARD-MIB").
-include("snmp_verbosity.hrl").
-define(enabled, 1).
-define(disabled, 2).
%% External exports
%% Avoid warning for local function error/1 clashing with autoimported BIF.
-compile({no_auto_import,[error/1]}).
-export([configure/1, reconfigure/1, reset/0, sys_up_time/0, sys_up_time/1,
snmp_enable_authen_traps/1, snmp_enable_authen_traps/2,
sys_object_id/1, sys_object_id/2, sys_or_table/3,
variable_func/1, variable_func/2,
inc/1, inc/2]).
-export([sysDescr/1, sysContact/1, sysName/1, sysLocation/1,
sysServices/1, sysUpTime/1, snmpEnableAuthenTraps/1,
sysObjectID/1,
snmpInPkts/1, snmpOutPkts/1,
snmpInBadVersions/1,
snmpInBadCommunityNames/1, snmpInBadCommunityUses/1,
snmpInASNParseErrs/1,
snmpInTooBigs/1,
snmpInNoSuchNames/1, snmpInBadValues/1,
snmpInReadOnlys/1, snmpInGenErrs/1,
snmpInTotalReqVars/1, snmpInTotalSetVars/1,
snmpInGetRequests/1, snmpInSetRequests/1,
snmpInGetNexts/1,
snmpInGetResponses/1, snmpInTraps/1,
snmpOutTooBigs/1,
snmpOutNoSuchNames/1,
snmpOutBadValues/1,
snmpOutGenErrs/1,
snmpOutGetRequests/1, snmpOutSetRequests/1,
snmpOutGetNexts/1,
snmpOutGetResponses/1,
snmpOutTraps/1]).
-export([dummy/1, snmp_set_serial_no/1, snmp_set_serial_no/2]).
-export([add_agent_caps/2, del_agent_caps/1, get_agent_caps/0]).
-export([check_standard/1]).
%%-----------------------------------------------------------------
%% Func: configure/1
%% Args: Dir is the directory with trailing dir_separator where
%% the configuration files can be found.
%% Purpose: Reads the config-files for the standard mib, and
%% inserts the data. Persistent data that is already
%% present is *not* changed! (use reconfigure for that)
%% Returns: ok
%% Fails: exit(configuration_error)
%%-----------------------------------------------------------------
configure(Dir) ->
case (catch do_configure(Dir)) of
ok ->
ok;
{error, Reason} ->
?vinfo("configure error: ~p", [Reason]),
config_err("configure failed: ~p", [Reason]),
exit(configuration_error);
Error ->
?vinfo("configure failed: ~p", [Error]),
config_err("configure failed: ~p", [Error]),
exit(configuration_error)
end.
do_configure(Dir) ->
case snmpa_agent:get_agent_mib_storage() of
mnesia ->
ok;
_ ->
Standard = read_standard(Dir),
lists:map(fun maybe_create_persistent_var/1, Standard)
end,
snmpa_local_db:variable_set({next_sys_or_index, volatile}, 1),
%% sysORTable is always volatile
snmp_generic:table_func(new, {sysORTable, volatile}),
ok.
%%-----------------------------------------------------------------
%% Func: reconfigure/1
%% Args: Dir is the directory with trailing dir_separator where
%% the configuration files can be found.
%% Purpose: Reads the config-files for the standard mib, and
%% inserts the data. Persistent data that is already
%% present is deleted. Makes sure the config file
%% data is used.
%% Returns: ok
%% Fails: exit(configuration_error)
%%-----------------------------------------------------------------
reconfigure(Dir) ->
set_sname(),
case (catch do_reconfigure(Dir)) of
ok ->
ok;
{error, Reason} ->
?vinfo("reconfigure error: ~p", [Reason]),
config_err("reconfigure failed: ~p", [Reason]),
exit(configuration_error);
Error ->
?vinfo("reconfigure failed: ~p", [Error]),
config_err("reconfigure failed: ~p", [Error]),
exit(configuration_error)
end.
do_reconfigure(Dir) ->
Standard = read_standard(Dir),
lists:map(fun create_persistent_var/1, Standard),
snmpa_local_db:variable_set({next_sys_or_index, volatile}, 1),
snmp_generic:table_func(new, {sysORTable, volatile}),
ok.
%%-----------------------------------------------------------------
%% Func: read_standard/1
%% Args: Dir is the directory with trailing dir_separator where
%% the configuration files can be found.
%% Purpose: Reads the standard configuration file.
%% Returns: A list of standard variables
%% Fails: If an error occurs, the process will die with Reason
%% configuration_error.
%% This file is mandatory, as it contains mandatory
%% config options for which there are no default values.
%%-----------------------------------------------------------------
read_standard(Dir) ->
?vdebug("check standard config file",[]),
FileName = "standard.conf",
Gen =
fun (D, Reason) ->
throw(
{error,
{failed_reading_config_file,
D, FileName, list_dir(Dir), Reason}})
end,
Order = fun snmp_conf:no_order/2,
Check = fun (Entry, State) -> {check_standard(Entry), State} end,
Filter = fun sort_standard/1,
[Standard] =
snmp_conf:read_files(Dir, [{FileName, Gen, Order, Check, Filter}]),
Standard.
list_dir(Dir) ->
case file:list_dir(Dir) of
{ok, Files} ->
Files;
Error ->
Error
end.
%%-----------------------------------------------------------------
%% Make sure that each mandatory standard attribute is present, and
%% provide default values for the other non-present attributes.
%%-----------------------------------------------------------------
sort_standard(L) ->
Mand = [{sysContact, {value, ""}},
{sysDescr, {value, ""}},
{sysLocation, {value, ""}},
{sysName, {value, ""}},
{sysObjectID, mandatory},
{sysServices, mandatory},
{snmpEnableAuthenTraps, mandatory}],
{ok, L2} = snmp_conf:check_mandatory(L, Mand),
lists:keysort(1, L2).
%%-----------------------------------------------------------------
%% Standard
%% {Name, Value}.
%%-----------------------------------------------------------------
check_standard({sysDescr, Value}) -> snmp_conf:check_string(Value);
check_standard({sysObjectID, Value}) -> snmp_conf:check_oid(Value);
check_standard({sysContact, Value}) -> snmp_conf:check_string(Value);
check_standard({sysName, Value}) -> snmp_conf:check_string(Value);
check_standard({sysLocation, Value}) -> snmp_conf:check_string(Value);
check_standard({sysServices, Value}) -> snmp_conf:check_integer(Value);
check_standard({snmpEnableAuthenTraps, Value}) ->
Atoms = [{enabled, ?snmpEnableAuthenTraps_enabled},
{disabled, ?snmpEnableAuthenTraps_disabled}],
{ok, Val} = snmp_conf:check_atom(Value, Atoms),
{ok, {snmpEnableAuthenTraps, Val}};
check_standard({Attrib, _Value}) -> error({unknown_attribute, Attrib});
check_standard(X) -> error({invalid_standard_specification, X}).
%%-----------------------------------------------------------------
%% Func: reset/0
%% Purpose: Resets all counters (sets them to 0).
%%-----------------------------------------------------------------
reset() ->
snmpa_mpd:reset().
maybe_create_persistent_var({Var, Val}) ->
VarDB = db(Var),
case snmp_generic:variable_get(VarDB) of
{value, _} -> ok;
_ -> snmp_generic:variable_set(VarDB, Val)
end.
create_persistent_var({Var, Val}) ->
snmp_generic:variable_set(db(Var), Val).
variable_func(_Op) -> ok.
variable_func(get, Name) ->
[{_, Val}] = ets:lookup(snmp_agent_table, Name),
{value, Val}.
%%-----------------------------------------------------------------
%% inc(VariableName) increments the variable (Counter) in
%% the local mib. (e.g. snmpInPkts)
%%-----------------------------------------------------------------
inc(Name) -> inc(Name, 1).
inc(Name, N) -> ets:update_counter(snmp_agent_table, Name, N).
sysDescr(print) ->
VarAndValue = [{sysDescr, sysDescr(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sysDescr(get) ->
VarDB = db(sysDescr),
snmp_generic:variable_get(VarDB).
sysContact(print) ->
VarAndValue = [{sysContact, sysContact(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sysContact(get) ->
VarDB = db(sysContact),
snmp_generic:variable_get(VarDB).
sysName(print) ->
VarAndValue = [{sysName, sysName(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sysName(get) ->
VarDB = db(sysName),
snmp_generic:variable_get(VarDB).
sysLocation(print) ->
VarAndValue = [{sysLocation, sysLocation(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sysLocation(get) ->
VarDB = db(sysLocation),
snmp_generic:variable_get(VarDB).
sysServices(print) ->
VarAndValue = [{sysServices, sysServices(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sysServices(get) ->
VarDB = db(sysServices),
snmp_generic:variable_get(VarDB).
snmpInPkts(print) ->
gen_counter(print, snmpInPkts);
snmpInPkts(get) ->
gen_counter(get, snmpInPkts).
snmpOutPkts(print) ->
gen_counter(print, snmpOutPkts);
snmpOutPkts(get) ->
gen_counter(get, snmpOutPkts).
snmpInASNParseErrs(print) ->
gen_counter(print, snmpInASNParseErrs);
snmpInASNParseErrs(get) ->
gen_counter(get, snmpInASNParseErrs).
snmpInBadCommunityNames(print) ->
gen_counter(print, snmpInBadCommunityNames);
snmpInBadCommunityNames(get) ->
gen_counter(get, snmpInBadCommunityNames).
snmpInBadCommunityUses(print) ->
gen_counter(print, snmpInBadCommunityUses);
snmpInBadCommunityUses(get) ->
gen_counter(get, snmpInBadCommunityUses).
snmpInBadVersions(print) ->
gen_counter(print, snmpInBadVersions);
snmpInBadVersions(get) ->
gen_counter(get, snmpInBadVersions).
snmpInTooBigs(print) ->
gen_counter(print, snmpInTooBigs);
snmpInTooBigs(get) ->
gen_counter(get, snmpInTooBigs).
snmpInNoSuchNames(print) ->
gen_counter(print, snmpInNoSuchNames);
snmpInNoSuchNames(get) ->
gen_counter(get, snmpInNoSuchNames).
snmpInBadValues(print) ->
gen_counter(print, snmpInBadValues);
snmpInBadValues(get) ->
gen_counter(get, snmpInBadValues).
snmpInReadOnlys(print) ->
gen_counter(print, snmpInReadOnlys);
snmpInReadOnlys(get) ->
gen_counter(get, snmpInReadOnlys).
snmpInGenErrs(print) ->
gen_counter(print, snmpInGenErrs);
snmpInGenErrs(get) ->
gen_counter(get, snmpInGenErrs).
snmpInTotalReqVars(print) ->
gen_counter(print, snmpInTotalReqVars);
snmpInTotalReqVars(get) ->
gen_counter(get, snmpInTotalReqVars).
snmpInTotalSetVars(print) ->
gen_counter(print, snmpInTotalSetVars);
snmpInTotalSetVars(get) ->
gen_counter(get, snmpInTotalSetVars).
snmpInGetRequests(print) ->
gen_counter(print, snmpInGetRequests);
snmpInGetRequests(get) ->
gen_counter(get, snmpInGetRequests).
snmpInSetRequests(print) ->
gen_counter(print, snmpInSetRequests);
snmpInSetRequests(get) ->
gen_counter(get, snmpInSetRequests).
snmpInGetNexts(print) ->
gen_counter(print, snmpInGetNexts);
snmpInGetNexts(get) ->
gen_counter(get, snmpInGetNexts).
snmpInGetResponses(print) ->
gen_counter(print, snmpInGetResponses);
snmpInGetResponses(get) ->
gen_counter(get, snmpInGetResponses).
snmpInTraps(print) ->
gen_counter(print, snmpInTraps);
snmpInTraps(get) ->
gen_counter(get, snmpInTraps).
snmpOutTooBigs(print) ->
gen_counter(print, snmpOutTooBigs);
snmpOutTooBigs(get) ->
gen_counter(get, snmpOutTooBigs).
snmpOutNoSuchNames(print) ->
gen_counter(print, snmpOutNoSuchNames);
snmpOutNoSuchNames(get) ->
gen_counter(get, snmpOutNoSuchNames).
snmpOutBadValues(print) ->
gen_counter(print, snmpOutBadValues);
snmpOutBadValues(get) ->
gen_counter(get, snmpOutBadValues).
snmpOutGenErrs(print) ->
gen_counter(print, snmpOutGenErrs);
snmpOutGenErrs(get) ->
gen_counter(get, snmpOutGenErrs).
snmpOutGetRequests(print) ->
gen_counter(print, snmpOutGetRequests);
snmpOutGetRequests(get) ->
gen_counter(get, snmpOutGetRequests).
snmpOutSetRequests(print) ->
gen_counter(print, snmpOutSetRequests);
snmpOutSetRequests(get) ->
gen_counter(get, snmpOutSetRequests).
snmpOutGetNexts(print) ->
gen_counter(print, snmpOutGetNexts);
snmpOutGetNexts(get) ->
gen_counter(get, snmpOutGetNexts).
snmpOutGetResponses(print) ->
gen_counter(print, snmpOutGetResponses);
snmpOutGetResponses(get) ->
gen_counter(get, snmpOutGetResponses).
snmpOutTraps(print) ->
gen_counter(print, snmpOutTraps);
snmpOutTraps(get) ->
gen_counter(get, snmpOutTraps).
gen_counter(print, Counter) ->
Val = gen_counter(get, Counter),
VarAndValue = [{Counter, Val}],
snmpa_mib_lib:print_variables(VarAndValue);
gen_counter(get, Counter) ->
variable_func(get, Counter).
%%-----------------------------------------------------------------
%% This is the instrumentation function for sysUpTime.
%%-----------------------------------------------------------------
sysUpTime(print) ->
sys_up_time(print);
sysUpTime(get) ->
sys_up_time(get).
sys_up_time() ->
snmpa:sys_up_time().
sys_up_time(print) ->
VarAndValue = [{sysUpTime, sys_up_time(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sys_up_time(get) ->
{value, snmpa:sys_up_time()}.
%%-----------------------------------------------------------------
%% This is the instrumentation function for snmpEnableAuthenTraps
%%-----------------------------------------------------------------
snmpEnableAuthenTraps(print) ->
snmp_enable_authen_traps(print);
snmpEnableAuthenTraps(get) ->
snmp_enable_authen_traps(get).
snmp_enable_authen_traps(print) ->
VarAndValue = [{snmpEnableAuthenTraps, snmp_enable_authen_traps(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
snmp_enable_authen_traps(new) ->
snmp_generic:variable_func(new, db(snmpEnableAuthenTraps));
snmp_enable_authen_traps(delete) ->
ok;
snmp_enable_authen_traps(get) ->
snmp_generic:variable_func(get, db(snmpEnableAuthenTraps)).
snmp_enable_authen_traps(set, NewVal) ->
snmp_generic:variable_func(set, NewVal, db(snmpEnableAuthenTraps)).
%%-----------------------------------------------------------------
%% This is the instrumentation function for sysObjectID
%%-----------------------------------------------------------------
sysObjectID(print) ->
sys_object_id(print);
sysObjectID(get) ->
sys_object_id(get).
sys_object_id(print) ->
VarAndValue = [{sysObjectID, sys_object_id(get)}],
snmpa_mib_lib:print_variables(VarAndValue);
sys_object_id(new) ->
snmp_generic:variable_func(new, db(sysObjectID));
sys_object_id(delete) ->
ok;
sys_object_id(get) ->
snmp_generic:variable_func(get, db(sysObjectID)).
sys_object_id(set, NewVal) ->
snmp_generic:variable_func(set, NewVal, db(sysObjectID)).
%%-----------------------------------------------------------------
%% This is a dummy instrumentation function for objects like
%% snmpTrapOID, that is accessible-for-notify, with different
%% values each time. This function will only be called with
%% new/delete.
%%-----------------------------------------------------------------
dummy(_Op) -> ok.
%%-----------------------------------------------------------------
%% This is the instrumentation function for snmpSetSerialNo.
%% It is always volatile.
%%-----------------------------------------------------------------
snmp_set_serial_no(new) ->
snmp_generic:variable_func(new, {snmpSetSerialNo, volatile}),
random:seed(erlang:phash2([node()]),
erlang:monotonic_time(),
erlang:unique_integer()),
Val = random:uniform(2147483648) - 1,
snmp_generic:variable_func(set, Val, {snmpSetSerialNo, volatile});
snmp_set_serial_no(delete) ->
ok;
snmp_set_serial_no(get) ->
snmp_generic:variable_func(get, {snmpSetSerialNo, volatile}).
snmp_set_serial_no(is_set_ok, NewVal) ->
case snmp_generic:variable_func(get, {snmpSetSerialNo, volatile}) of
{value, NewVal} -> noError;
_ -> inconsistentValue
end;
snmp_set_serial_no(set, NewVal) ->
snmp_generic:variable_func(set, (NewVal + 1) rem 2147483648,
{snmpSetSerialNo, volatile}).
%%-----------------------------------------------------------------
%% This is the instrumentation function for sysOrTable
%%-----------------------------------------------------------------
sys_or_table(Op, RowIndex, Cols) ->
snmp_generic:table_func(Op, RowIndex, Cols, {sysORTable, volatile}).
add_agent_caps(Oid, Descr) when is_list(Oid) andalso is_list(Descr) ->
{value, Next} = snmpa_local_db:variable_get({next_sys_or_index, volatile}),
snmpa_local_db:variable_set({next_sys_or_index, volatile}, Next+1),
SysUpTime = sys_up_time(),
Row = {Next, Oid, Descr, SysUpTime},
snmpa_local_db:table_create_row({sysORTable, volatile}, [Next], Row),
snmpa_local_db:variable_set({sysORLastChange, volatile}, SysUpTime),
Next.
del_agent_caps(Index) ->
snmpa_local_db:table_delete_row({sysORTable, volatile}, [Index]),
snmpa_local_db:variable_set({sysORLastChange, volatile}, sys_up_time()).
get_agent_caps() ->
snmpa_local_db:match({sysORTable, volatile}, {'$1', '$2', '$3', '$4'}).
db(Var) -> snmpa_agent:db(Var).
%% -----
set_sname() ->
set_sname(get(sname)).
set_sname(undefined) ->
put(sname,conf);
set_sname(_) -> %% Keep it, if already set.
ok.
error(Reason) ->
throw({error, Reason}).
config_err(F, A) ->
snmpa_error:config_err("[STANDARD-MIB] " ++ F, A).
