diff options
Diffstat (limited to 'lib/snmp/src/agent/snmpa_agent.erl')
| -rw-r--r-- | lib/snmp/src/agent/snmpa_agent.erl | 586 |
1 files changed, 437 insertions, 149 deletions
diff --git a/lib/snmp/src/agent/snmpa_agent.erl b/lib/snmp/src/agent/snmpa_agent.erl index f70885b2ec..00fe9be098 100644 --- a/lib/snmp/src/agent/snmpa_agent.erl +++ b/lib/snmp/src/agent/snmpa_agent.erl @@ -65,7 +65,10 @@ %% Internal exports -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3, tr_var/2, tr_varbind/1, - handle_pdu/7, worker/2, worker_loop/1, do_send_trap/7]). + handle_pdu/8, worker/2, worker_loop/1, do_send_trap/7]). +%% <BACKWARD-COMPAT> +-export([handle_pdu/7]). +%% </BACKWARD-COMPAT> -ifndef(default_verbosity). -define(default_verbosity,silence). @@ -81,7 +84,6 @@ -define(DISCO_TERMINATING_TRIGGER_USERNAME, ""). - -ifdef(snmp_debug). -define(GS_START_LINK3(Prio, Parent, Ref, Opts), gen_server:start_link(?MODULE, [Prio, Parent, Ref, Opts], @@ -97,13 +99,48 @@ gen_server:start_link({local, Name}, ?MODULE, [Prio, Parent, Ref, Opts],[])). -endif. - + +%% Increment this whenever a change is made to the worker interface +-define(WORKER_INTERFACE_VERSION, 1). + +%% -- Utility macros for creating worker commands -- +-define(mk_pdu_wreq(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra), + #wrequest{cmd = handle_pdu, + info = [{vsn, Vsn}, + {pdu, Pdu}, + {pdu_ms, PduMS}, + {acm_data, ACMData}, + {addr, Address}, + {gb_max_vbs, GbMaxVBs}, + {extra, Extra}]}). +-define(mk_send_trap_wreq(TrapRec, NotifyName, ContextName, + Recv, Vbs, LocalEngineID), + #wrequest{cmd = send_trap, + info = [{trap_rec, TrapRec}, + {notify_name, NotifyName}, + {context_name, ContextName}, + {receiver, Recv}, + {varbinds, Vbs}, + {local_engine_id, LocalEngineID}]}). +-define(mk_terminate_wreq(), #wrequest{cmd = terminate, info = []}). +-define(mk_verbosity_wreq(V), #wrequest{cmd = verbosity, + info = [{verbosity, V}]}). + -record(notification_filter, {id, mod, data}). -record(disco, {from, rec, sender, target, engine_id, sec_level, ctx, ivbs, stage, handler, extra}). +%% This record is used when sending requests to the worker processes +-record(wrequest, + { + version = ?WORKER_INTERFACE_VERSION, + cmd, + info + } + ). + %%----------------------------------------------------------------- %% The agent is multi-threaded, i.e. each request is handled @@ -136,7 +173,8 @@ net_if_mod, backup, disco, - mibs_cache_request}). + mibs_cache_request, + gb_max_vbs}). %%%----------------------------------------------------------------- @@ -324,6 +362,8 @@ do_init(Prio, Parent, Ref, Options) -> MultiT = get_multi_threaded(Options), Vsns = get_versions(Options), + GbMaxVbs = get_gb_max_vbs(Options), + NS = start_note_store(Prio, Ref, Options), {Type, NetIfPid, NetIfMod} = start_net_if(Parent, Prio, Ref, Vsns, NS, Options), @@ -342,7 +382,8 @@ do_init(Prio, Parent, Ref, Options) -> ref = Ref, vsns = Vsns, note_store = NS, - net_if_mod = NetIfMod}}. + net_if_mod = NetIfMod, + gb_max_vbs = GbMaxVbs}}. start_note_store(Prio, Ref, Options) -> @@ -404,7 +445,8 @@ start_net_if(Parent, _Prio, _Ref, _Vsns, _NoteStore, _Options) start_mib_server(Prio, Ref, Mibs, Options) -> ?vdebug("start_mib_server -> with Prio: ~p", [Prio]), MibStorage = get_mib_storage(Options), - MibsOpts = [{mib_storage, MibStorage}|get_option(mib_server, Options, [])], + MibsOpts = [{mib_storage, MibStorage} | + get_option(mib_server, Options, [])], ?vtrace("start_mib_server -> " "~n Mibs: ~p" @@ -734,7 +776,8 @@ handle_info({snmp_pdu, Vsn, Pdu, PduMS, ACMData, Address, Extra}, S) -> ?vdebug("handle_info(snmp_pdu) -> entry with" "~n Vsn: ~p" "~n Pdu: ~p" - "~n Address: ~p", [Vsn, Pdu, Address]), + "~n Address: ~p" + "~n Extra: ~p", [Vsn, Pdu, Address, Extra]), NewS = handle_snmp_pdu(is_valid_pdu_type(Pdu#pdu.type), Vsn, Pdu, PduMS, ACMData, Address, Extra, S), @@ -1005,7 +1048,7 @@ handle_call({subagent_get_next, MibView, Varbinds, PduData}, _From, S) -> "~n PduData: ~p", [MibView,Varbinds,PduData]), put_pdu_data(PduData), - {reply, do_get_next(MibView, Varbinds), S}; + {reply, do_get_next(MibView, Varbinds, infinity), S}; handle_call({subagent_set, Arguments, PduData}, _From, S) -> ?vlog("[handle_call] subagent set:" "~n Arguments: ~p" @@ -1046,7 +1089,7 @@ handle_call({get_next, Vars, Context}, _From, S) -> ?vdebug("Varbinds: ~p",[Varbinds]), MibView = snmpa_acm:get_root_mib_view(), Reply = - case do_get_next(MibView, Varbinds) of + case do_get_next(MibView, Varbinds, infinity) of {noError, 0, NewVarbinds} -> Vbs = lists:keysort(#varbind.org_index, NewVarbinds), [{Oid,Val} || #varbind{oid = Oid, value = Val} <- Vbs]; @@ -1242,15 +1285,15 @@ handle_call(Req, _From, S) -> Reply = {error, {unknown, Req}}, {reply, Reply, S}. -handle_cast({verbosity,Verbosity}, S) -> - ?vlog("verbosity: ~p -> ~p",[get(verbosity),Verbosity]), +handle_cast({verbosity, Verbosity}, S) -> + ?vlog("verbosity: ~p -> ~p",[get(verbosity), Verbosity]), put(verbosity,snmp_verbosity:validate(Verbosity)), case S#state.worker of - Pid when is_pid(Pid) -> Pid ! {verbosity,Verbosity}; + Pid when is_pid(Pid) -> Pid ! ?mk_verbosity_wreq(Verbosity); _ -> ok end, case S#state.set_worker of - Pid2 when is_pid(Pid2) -> Pid2 ! {verbosity,Verbosity}; + Pid2 when is_pid(Pid2) -> Pid2 ! ?mk_verbosity_wreq(Verbosity); _ -> ok end, {noreply, S}; @@ -1337,13 +1380,80 @@ handle_mibs_cache_request(MibServer, Req) -> %% Downgrade %% -%% code_change({down, _Vsn}, S, downgrade_to_pre_4_13) -> -%% {ok, S2}; +code_change({down, _Vsn}, S1, downgrade_to_pre_4_17_3) -> + #state{type = Type, + parent = Parent, + worker = Worker, + worker_state = WorkerState, + set_worker = SetWorker, + multi_threaded = MT, + ref = Ref, + vsns = Vsns, + nfilters = NF, + note_store = NoteStore, + mib_server = MS, + net_if = NetIf, + net_if_mod = NetIfMod, + backup = Backup, + disco = Disco, + mibs_cache_request = MCR} = S1, + S2 = {state, + type = Type, + parent = Parent, + worker = Worker, + worker_state = WorkerState, + set_worker = SetWorker, + multi_threaded = MT, + ref = Ref, + vsns = Vsns, + nfilters = NF, + note_store = NoteStore, + mib_server = MS, + net_if = NetIf, + net_if_mod = NetIfMod, + backup = Backup, + disco = Disco, + mibs_cache_request = MCR}, + {ok, S2}; %% Upgrade %% -%% code_change(_Vsn, S, upgrade_from_pre_4_13) -> -%% {ok, S2}; +code_change(_Vsn, S1, upgrade_from_pre_4_17_3) -> + {state, + type = Type, + parent = Parent, + worker = Worker, + worker_state = WorkerState, + set_worker = SetWorker, + multi_threaded = MT, + ref = Ref, + vsns = Vsns, + nfilters = NF, + note_store = NoteStore, + mib_server = MS, + net_if = NetIf, + net_if_mod = NetIfMod, + backup = Backup, + disco = Disco, + mibs_cache_request = MCR} = S1, + S2 = #state{type = Type, + parent = Parent, + worker = Worker, + worker_state = WorkerState, + set_worker = SetWorker, + multi_threaded = MT, + ref = Ref, + vsns = Vsns, + nfilters = NF, + note_store = NoteStore, + mib_server = MS, + net_if = NetIf, + net_if_mod = NetIfMod, + backup = Backup, + disco = Disco, + mibs_cache_request = MCR, + gb_max_vbs = ?DEFAULT_GB_MAX_VBS}, + {ok, S2}; code_change(_Vsn, S, _Extra) -> {ok, S}. @@ -1383,7 +1493,7 @@ worker_start(Dict) -> %% worker_stop(Pid, infinity). worker_stop(Pid, Timeout) when is_pid(Pid) -> - Pid ! terminate, + Pid ! ?mk_terminate_wreq(), receive {'EXIT', Pid, normal} -> ok @@ -1517,9 +1627,11 @@ invalidate_ca_cache() -> %% %%----------------------------------------------------------------- -spawn_thread(Vsn, Pdu, PduMS, ACMData, Address, Extra) -> +%% This functions spawns a temporary worker process, +%% that evaluates one request and then silently exits. +spawn_thread(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra) -> Dict = get(), - Args = [Vsn, Pdu, PduMS, ACMData, Address, Extra, Dict], + Args = [Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra, Dict], proc_lib:spawn_link(?MODULE, handle_pdu, Args). spawn_trap_thread(TrapRec, NotifyName, ContextName, Recv, Vbs, @@ -1532,7 +1644,7 @@ spawn_trap_thread(TrapRec, NotifyName, ContextName, Recv, Vbs, do_send_trap(TrapRec, NotifyName, ContextName, Recv, Vbs, LocalEngineID, Dict) -> lists:foreach(fun({Key, Val}) -> put(Key, Val) end, Dict), - put(sname,trap_sender_short_name(get(sname))), + put(sname, trap_sender_short_name(get(sname))), ?vlog("starting",[]), snmpa_trap:send_trap(TrapRec, NotifyName, ContextName, Recv, Vbs, LocalEngineID, get(net_if)). @@ -1544,45 +1656,119 @@ worker(Master, Dict) -> worker_loop(Master). worker_loop(Master) -> - receive - {Vsn, Pdu, PduMS, ACMData, Address, Extra} -> - ?vtrace("worker_loop -> received request", []), - handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra), - Master ! worker_available; - - %% We don't trap exits! - {TrapRec, NotifyName, ContextName, Recv, Vbs} -> - ?vtrace("worker_loop -> send trap:" - "~n ~p", [TrapRec]), - snmpa_trap:send_trap(TrapRec, NotifyName, - ContextName, Recv, Vbs, get(net_if)), - Master ! worker_available; - - %% We don't trap exits! - {send_trap, - TrapRec, NotifyName, ContextName, Recv, Vbs, LocalEngineID} -> - ?vtrace("worker_loop -> send trap:" - "~n ~p", [TrapRec]), - snmpa_trap:send_trap(TrapRec, NotifyName, - ContextName, Recv, Vbs, LocalEngineID, - get(net_if)), - Master ! worker_available; - - {verbosity, Verbosity} -> - put(verbosity,snmp_verbosity:validate(Verbosity)); - - terminate -> - exit(normal); - - _X -> - %% ignore - ok - - after 30000 -> - %% This is to assure that the worker process leaves a - %% possibly old version of this module. - ok - end, + Res = + receive + #wrequest{cmd = handle_pdu, + info = Info} = Req -> + ?vtrace("worker_loop -> received handle_pdu request with" + "~n Info: ~p", [Info]), + Vsn = proplists:get_value(vsn, Info), + Pdu = proplists:get_value(pdu, Info), + PduMS = proplists:get_value(pdu_ms, Info), + ACMData = proplists:get_value(acm_data, Info), + Address = proplists:get_value(addr, Info), + GbMaxVBs = proplists:get_value(gb_max_vbs, Info), + Extra = proplists:get_value(extra, Info), + HandlePduRes = + try + begin + handle_pdu2(Vsn, Pdu, PduMS, ACMData, Address, + GbMaxVBs, Extra) + end + catch + T:E -> + exit({worker_crash, Req, T, E, + erlang:get_stacktrace()}) + end, + Master ! worker_available, + HandlePduRes; % For debugging... + + + #wrequest{cmd = send_trap, + info = Info} = Req -> + ?vtrace("worker_loop -> received send_trap request with" + "~n Info: ~p", [Info]), + TrapRec = proplists:get_value(trap_rec, Info), + NotifyName = proplists:get_value(notify_name, Info), + ContextName = proplists:get_value(context_name, Info), + Recv = proplists:get_value(receiver, Info), + Vbs = proplists:get_value(varbinds, Info), + LocalEngineID = proplists:get_value(local_engine_id, Info), + SendTrapRes = + try + begin + snmpa_trap:send_trap(TrapRec, NotifyName, + ContextName, Recv, Vbs, + LocalEngineID, + get(net_if)) + end + catch + T:E -> + exit({worker_crash, Req, T, E, + erlang:get_stacktrace()}) + end, + Master ! worker_available, + SendTrapRes; % For debugging... + + + #wrequest{cmd = verbosity, + info = Info} -> + Verbosity = proplists:get_value(verbosity, Info), + put(verbosity, snmp_verbosity:validate(Verbosity)); + + + #wrequest{cmd = terminate} -> + ?vtrace("worker_loop -> received terminate request", []), + exit(normal); + + + %% ************************************************************* + %% + %% Kept for backward compatibillity reasons + %% + %% ************************************************************* + + {Vsn, Pdu, PduMS, ACMData, Address, Extra} -> + ?vtrace("worker_loop -> received request", []), + handle_pdu2(Vsn, Pdu, PduMS, ACMData, Address, + ?DEFAULT_GB_MAX_VBS, Extra), + Master ! worker_available; + + %% We don't trap exits! + {TrapRec, NotifyName, ContextName, Recv, Vbs} -> + ?vtrace("worker_loop -> send trap:" + "~n ~p", [TrapRec]), + snmpa_trap:send_trap(TrapRec, NotifyName, + ContextName, Recv, Vbs, get(net_if)), + Master ! worker_available; + + %% We don't trap exits! + {send_trap, + TrapRec, NotifyName, ContextName, Recv, Vbs, LocalEngineID} -> + ?vtrace("worker_loop -> send trap:" + "~n ~p", [TrapRec]), + snmpa_trap:send_trap(TrapRec, NotifyName, + ContextName, Recv, Vbs, LocalEngineID, + get(net_if)), + Master ! worker_available; + + {verbosity, Verbosity} -> + put(verbosity, snmp_verbosity:validate(Verbosity)); + + terminate -> + exit(normal); + + _X -> + %% ignore + ignore_unknown + + after 30000 -> + %% This is to assure that the worker process leaves a + %% possibly old version of this module. + ok + end, + ?vtrace("worker_loop -> wrap with" + "~n ~p", [Res]), ?MODULE:worker_loop(Master). @@ -1590,42 +1776,52 @@ worker_loop(Master) -> %%----------------------------------------------------------------- handle_snmp_pdu(true, Vsn, Pdu, PduMS, ACMData, Address, Extra, - #state{multi_threaded = false} = S) -> + #state{multi_threaded = false, + gb_max_vbs = GbMaxVBs} = S) -> ?vtrace("handle_snmp_pdu -> single-thread agent",[]), - handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra), + handle_pdu2(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra), S; handle_snmp_pdu(true, Vsn, #pdu{type = 'set-request'} = Pdu, PduMS, ACMData, Address, Extra, #state{set_worker = Worker} = S) -> ?vtrace("handle_snmp_pdu -> multi-thread agent: " "send set-request to main worker",[]), - Worker ! {Vsn, Pdu, PduMS, ACMData, Address, Extra}, + WRequest = ?mk_pdu_wreq(Vsn, Pdu, PduMS, ACMData, Address, infinity, Extra), + Worker ! WRequest, S#state{worker_state = busy}; handle_snmp_pdu(true, Vsn, Pdu, PduMS, ACMData, Address, Extra, - #state{worker_state = busy} = S) -> + #state{worker_state = busy, + gb_max_vbs = GbMaxVBs} = S) -> ?vtrace("handle_snmp_pdu -> multi-thread agent: " "main worker busy - create new worker",[]), - spawn_thread(Vsn, Pdu, PduMS, ACMData, Address, Extra), + spawn_thread(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra), S; handle_snmp_pdu(true, Vsn, Pdu, PduMS, ACMData, Address, Extra, - #state{worker = Worker} = S) -> + #state{worker = Worker, + gb_max_vbs = GbMaxVBs} = S) -> ?vtrace("handle_snmp_pdu -> multi-thread agent: " "send to main worker",[]), - Worker ! {Vsn, Pdu, PduMS, ACMData, Address, Extra}, + WRequest = ?mk_pdu_wreq(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra), + Worker ! WRequest, S#state{worker_state = busy}; handle_snmp_pdu(_, _Vsn, _Pdu, _PduMS, _ACMData, _Address, _Extra, S) -> S. %% Called via the spawn_thread function +%% <BACKWARD-COMPAT> handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra, Dict) -> + handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, ?DEFAULT_GB_MAX_VBS, Extra, + Dict). +%% </BACKWARD-COMPAT> +handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra, Dict) -> lists:foreach(fun({Key, Val}) -> put(Key, Val) end, Dict), put(sname, pdu_handler_short_name(get(sname))), ?vlog("new worker starting",[]), - handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra). + handle_pdu2(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra). -handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra) -> +handle_pdu2(Vsn, Pdu, PduMS, ACMData, Address, GbMaxVBs, Extra) -> %% OTP-3324 AuthMod = get(auth_module), case AuthMod:init_check_access(Pdu, ACMData) of @@ -1634,7 +1830,8 @@ handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra) -> "~n MibView: ~p" "~n ContextName: ~p", [MibView, ContextName]), AgentData = cheat(ACMData, Address, ContextName), - do_handle_pdu(MibView, Vsn, Pdu, PduMS, ACMData, AgentData, Extra); + do_handle_pdu(MibView, Vsn, Pdu, PduMS, ACMData, AgentData, + GbMaxVBs, Extra); {error, Reason} -> ?vlog("handle_pdu -> error:" "~n Reason: ~p", [Reason]), @@ -1648,16 +1845,19 @@ handle_pdu(Vsn, Pdu, PduMS, ACMData, Address, Extra) -> end. do_handle_pdu(MibView, Vsn, Pdu, PduMS, - ACMData, {Community, Address, ContextName}, Extra) -> + ACMData, {Community, Address, ContextName}, + GbMaxVBs, Extra) -> put(net_if_data, Extra), + RePdu = process_msg(MibView, Vsn, Pdu, PduMS, Community, - Address, ContextName), + Address, ContextName, GbMaxVBs), ?vtrace("do_handle_pdu -> processed:" "~n RePdu: ~p", [RePdu]), - get(net_if) ! {snmp_response, Vsn, RePdu, - RePdu#pdu.type, ACMData, Address, Extra}. + NetIf = get(net_if), + NetIf ! {snmp_response, Vsn, RePdu, + RePdu#pdu.type, ACMData, Address, Extra}. handle_acm_error(Vsn, Reason, Pdu, ACMData, Address, Extra) -> @@ -1831,9 +2031,9 @@ do_handle_send_trap(S, TrapRec, NotifyName, ContextName, Recv, Varbinds, master_agent -> %% Send to main worker ?vtrace("do_handle_send_trap -> send to main worker",[]), - S#state.worker ! {send_trap, - TrapRec, NotifyName, ContextName, Recv, Vbs, - LocalEngineID}, + S#state.worker ! ?mk_send_trap_wreq(TrapRec, NotifyName, + ContextName, Recv, Vbs, + LocalEngineID), {ok, S#state{worker_state = busy}} end. @@ -2170,17 +2370,18 @@ handle_mib_of(MibServer, Oid) -> %% Func: process_msg/7 %% Returns: RePdu %%----------------------------------------------------------------- -process_msg(MibView, Vsn, Pdu, PduMS, Community, {Ip, Udp}, ContextName) -> +process_msg(MibView, Vsn, Pdu, PduMS, Community, {Ip, Udp}, ContextName, + GbMaxVBs) -> #pdu{request_id = ReqId} = Pdu, put(snmp_address, {tuple_to_list(Ip), Udp}), put(snmp_request_id, ReqId), put(snmp_community, Community), put(snmp_context, ContextName), ?vtrace("process ~p",[Pdu#pdu.type]), - process_pdu(Pdu, PduMS, Vsn, MibView). + process_pdu(Pdu, PduMS, Vsn, MibView, GbMaxVBs). process_pdu(#pdu{type='get-request', request_id = ReqId, varbinds=Vbs}, - _PduMS, Vsn, MibView) -> + _PduMS, Vsn, MibView, _GbMaxVBs) -> ?vtrace("get ~p",[ReqId]), Res = get_err(do_get(MibView, Vbs, false)), ?vtrace("get result: " @@ -2201,12 +2402,12 @@ process_pdu(#pdu{type='get-request', request_id = ReqId, varbinds=Vbs}, make_response_pdu(ReqId, ErrStatus, ErrIndex, Vbs, ResponseVarbinds); process_pdu(#pdu{type = 'get-next-request', request_id = ReqId, varbinds = Vbs}, - _PduMS, Vsn, MibView) -> + _PduMS, Vsn, MibView, _GbMaxVBs) -> ?vtrace("process get-next-request -> entry with" "~n ReqId: ~p" "~n Vbs: ~p" "~n MibView: ~p",[ReqId, Vbs, MibView]), - Res = get_err(do_get_next(MibView, Vbs)), + Res = get_err(do_get_next(MibView, Vbs, infinity)), ?vtrace("get-next result: " "~n ~p",[Res]), {ErrStatus, ErrIndex, ResVarbinds} = @@ -2223,11 +2424,15 @@ process_pdu(#pdu{type = 'get-next-request', request_id = ReqId, varbinds = Vbs}, "~n ~p",[ResponseVarbinds]), make_response_pdu(ReqId, ErrStatus, ErrIndex, Vbs, ResponseVarbinds); -process_pdu(#pdu{type = 'get-bulk-request',request_id = ReqId,varbinds = Vbs, - error_status = NonRepeaters, error_index = MaxRepetitions}, - PduMS, _Vsn, MibView)-> +process_pdu(#pdu{type = 'get-bulk-request', + request_id = ReqId, + varbinds = Vbs, + error_status = NonRepeaters, + error_index = MaxRepetitions}, + PduMS, _Vsn, MibView, GbMaxVBs) -> {ErrStatus, ErrIndex, ResponseVarbinds} = - get_err(do_get_bulk(MibView,NonRepeaters,MaxRepetitions,PduMS,Vbs)), + get_err(do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Vbs, + GbMaxVBs)), ?vtrace("get-bulk final result: " "~n Error status: ~p" "~n Error index: ~p" @@ -2236,7 +2441,7 @@ process_pdu(#pdu{type = 'get-bulk-request',request_id = ReqId,varbinds = Vbs, make_response_pdu(ReqId, ErrStatus, ErrIndex, Vbs, ResponseVarbinds); process_pdu(#pdu{type = 'set-request', request_id = ReqId, varbinds = Vbs}, - _PduMS, Vsn, MibView)-> + _PduMS, Vsn, MibView, _GbMaxVbs)-> Res = do_set(MibView, Vbs), ?vtrace("set result: " "~n ~p",[Res]), @@ -2293,7 +2498,8 @@ validate_next_v1_2([Vb | _Vbs], _MibView, _Res) {noSuchName, Vb#varbind.org_index}; validate_next_v1_2([Vb | Vbs], MibView, Res) when Vb#varbind.variabletype =:= 'Counter64' -> - case validate_next_v1(do_get_next(MibView, [mk_next_oid(Vb)]), MibView) of + case validate_next_v1( + do_get_next(MibView, [mk_next_oid(Vb)], infinity), MibView) of {noError, 0, [NVb]} -> validate_next_v1_2(Vbs, MibView, [NVb | Res]); {Error, Index, _OrgVb} -> @@ -2766,59 +2972,97 @@ validate_tab_res(_TooMany, [], Mfa, _Res, I) -> %% that this really matters, since many nexts across the same %% subagent must be considered to be very rare. %%----------------------------------------------------------------- -do_get_next(MibView, UnsortedVarbinds) -> - SortedVarbinds = oid_sort_varbindlist(UnsortedVarbinds), - next_loop_varbinds([], SortedVarbinds, MibView, [], []). -oid_sort_varbindlist(Vbs) -> +%% It may be a bit agressive to check this already, +%% but since it is a security measure, it makes sense. +do_get_next(_MibView, UnsortedVarbinds, GbMaxVBs) + when (is_integer(GbMaxVBs) andalso (length(UnsortedVarbinds) > GbMaxVBs)) -> + {tooBig, 0, []}; % What is the correct index in this case? +do_get_next(MibView, UnsortedVBs, GbMaxVBs) -> + ?vt("do_get_next -> entry when" + "~n MibView: ~p" + "~n UnsortedVBs: ~p", [MibView, UnsortedVBs]), + SortedVBs = oid_sort_vbs(UnsortedVBs), + ?vt("do_get_next -> " + "~n SortedVBs: ~p", [SortedVBs]), + next_loop_varbinds([], SortedVBs, MibView, [], [], GbMaxVBs). + +oid_sort_vbs(Vbs) -> lists:keysort(#varbind.oid, Vbs). +next_loop_varbinds(_, Vbs, _MibView, Res, _LAVb, GbMaxVBs) + when (is_integer(GbMaxVBs) andalso + ((length(Vbs) + length(Res)) > GbMaxVBs)) -> + {tooBig, 0, []}; % What is the correct index in this case? + %% LAVb is Last Accessible Vb -next_loop_varbinds([], [Vb | Vbs], MibView, Res, LAVb) -> +next_loop_varbinds([], [Vb | Vbs], MibView, Res, LAVb, GbMaxVBs) -> ?vt("next_loop_varbinds -> entry when" "~n Vb: ~p" "~n MibView: ~p", [Vb, MibView]), case varbind_next(Vb, MibView) of endOfMibView -> + ?vt("next_loop_varbind -> endOfMibView", []), RVb = if LAVb =:= [] -> Vb; true -> LAVb end, NewVb = RVb#varbind{variabletype = 'NULL', value = endOfMibView}, - next_loop_varbinds([], Vbs, MibView, [NewVb | Res], []); + next_loop_varbinds([], Vbs, MibView, [NewVb | Res], [], GbMaxVBs); + {variable, ME, VarOid} when ((ME#me.access =/= 'not-accessible') andalso (ME#me.access =/= 'write-only') andalso (ME#me.access =/= 'accessible-for-notify')) -> + ?vt("next_loop_varbind -> variable: " + "~n ME: ~p" + "~n VarOid: ~p", [ME, VarOid]), case try_get_instance(Vb, ME) of {value, noValue, _NoSuchSomething} -> + ?vt("next_loop_varbind -> noValue", []), %% Try next one - NewVb = Vb#varbind{oid = VarOid, value = 'NULL'}, - next_loop_varbinds([], [NewVb | Vbs], MibView, Res, []); + NewVb = Vb#varbind{oid = VarOid, + value = 'NULL'}, + next_loop_varbinds([], [NewVb | Vbs], MibView, Res, [], + GbMaxVBs); {value, Type, Value} -> - NewVb = Vb#varbind{oid = VarOid, variabletype = Type, - value = Value}, - next_loop_varbinds([], Vbs, MibView, [NewVb | Res], []); + ?vt("next_loop_varbind -> value" + "~n Type: ~p" + "~n Value: ~p", [Type, Value]), + NewVb = Vb#varbind{oid = VarOid, + variabletype = Type, + value = Value}, + next_loop_varbinds([], Vbs, MibView, [NewVb | Res], [], + GbMaxVBs); {error, ErrorStatus} -> ?vdebug("next loop varbinds:" "~n ErrorStatus: ~p",[ErrorStatus]), {ErrorStatus, Vb#varbind.org_index, []} end; {variable, _ME, VarOid} -> + ?vt("next_loop_varbind -> variable: " + "~n VarOid: ~p", [VarOid]), RVb = if LAVb =:= [] -> Vb; true -> LAVb end, NewVb = Vb#varbind{oid = VarOid, value = 'NULL'}, - next_loop_varbinds([], [NewVb | Vbs], MibView, Res, RVb); + next_loop_varbinds([], [NewVb | Vbs], MibView, Res, RVb, GbMaxVBs); {table, TableOid, TableRestOid, ME} -> + ?vt("next_loop_varbind -> table: " + "~n TableOid: ~p" + "~n TableRestOid: ~p" + "~n ME: ~p", [TableOid, TableRestOid, ME]), next_loop_varbinds({table, TableOid, ME, [{tab_oid(TableRestOid), Vb}]}, - Vbs, MibView, Res, []); + Vbs, MibView, Res, [], GbMaxVBs); {subagent, SubAgentPid, SAOid} -> + ?vt("next_loop_varbind -> subagent: " + "~n SubAgentPid: ~p" + "~n SAOid: ~p", [SubAgentPid, SAOid]), NewVb = Vb#varbind{variabletype = 'NULL', value = 'NULL'}, next_loop_varbinds({subagent, SubAgentPid, SAOid, [NewVb]}, - Vbs, MibView, Res, []) + Vbs, MibView, Res, [], GbMaxVBs) end; next_loop_varbinds({table, TableOid, ME, TabOids}, - [Vb | Vbs], MibView, Res, _LAVb) -> + [Vb | Vbs], MibView, Res, _LAVb, GbMaxVBs) -> ?vt("next_loop_varbinds(table) -> entry with" "~n TableOid: ~p" "~n Vb: ~p", [TableOid, Vb]), @@ -2826,13 +3070,14 @@ next_loop_varbinds({table, TableOid, ME, TabOids}, {table, TableOid, TableRestOid, _ME} -> next_loop_varbinds({table, TableOid, ME, [{tab_oid(TableRestOid), Vb} | TabOids]}, - Vbs, MibView, Res, []); + Vbs, MibView, Res, [], GbMaxVBs); _ -> case get_next_table(ME, TableOid, TabOids, MibView) of {ok, TabRes, TabEndOfTabVbs} -> NewVbs = lists:append(TabEndOfTabVbs, [Vb | Vbs]), NewRes = lists:append(TabRes, Res), - next_loop_varbinds([], NewVbs, MibView, NewRes, []); + next_loop_varbinds([], NewVbs, MibView, NewRes, [], + GbMaxVBs); {ErrorStatus, OrgIndex} -> ?vdebug("next loop varbinds: next varbind" "~n ErrorStatus: ~p" @@ -2842,7 +3087,7 @@ next_loop_varbinds({table, TableOid, ME, TabOids}, end end; next_loop_varbinds({table, TableOid, ME, TabOids}, - [], MibView, Res, _LAVb) -> + [], MibView, Res, _LAVb, GbMaxVBs) -> ?vt("next_loop_varbinds(table) -> entry with" "~n TableOid: ~p", [TableOid]), case get_next_table(ME, TableOid, TabOids, MibView) of @@ -2851,7 +3096,8 @@ next_loop_varbinds({table, TableOid, ME, TabOids}, "~n TabRes: ~p" "~n TabEndOfTabVbs: ~p", [TabRes, TabEndOfTabVbs]), NewRes = lists:append(TabRes, Res), - next_loop_varbinds([], TabEndOfTabVbs, MibView, NewRes, []); + next_loop_varbinds([], TabEndOfTabVbs, MibView, NewRes, [], + GbMaxVBs); {ErrorStatus, OrgIndex} -> ?vdebug("next loop varbinds: next table" "~n ErrorStatus: ~p" @@ -2860,7 +3106,7 @@ next_loop_varbinds({table, TableOid, ME, TabOids}, {ErrorStatus, OrgIndex, []} end; next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, - [Vb | Vbs], MibView, Res, _LAVb) -> + [Vb | Vbs], MibView, Res, _LAVb, GbMaxVBs) -> ?vt("next_loop_varbinds(subagent) -> entry with" "~n SAPid: ~p" "~n SAOid: ~p" @@ -2869,13 +3115,14 @@ next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, {subagent, _SubAgentPid, SAOid} -> next_loop_varbinds({subagent, SAPid, SAOid, [Vb | SAVbs]}, - Vbs, MibView, Res, []); + Vbs, MibView, Res, [], GbMaxVBs); _ -> case get_next_sa(SAPid, SAOid, SAVbs, MibView) of {ok, SARes, SAEndOfMibViewVbs} -> NewVbs = lists:append(SAEndOfMibViewVbs, [Vb | Vbs]), NewRes = lists:append(SARes, Res), - next_loop_varbinds([], NewVbs, MibView, NewRes, []); + next_loop_varbinds([], NewVbs, MibView, NewRes, [], + GbMaxVBs); {noSuchName, OrgIndex} -> %% v1 reply, treat this Vb as endOfMibView, and try again %% for the others. @@ -2888,12 +3135,14 @@ next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, case lists:delete(EVb, SAVbs) of [] -> next_loop_varbinds([], [EndOfVb, Vb | Vbs], - MibView, Res, []); + MibView, Res, [], + GbMaxVBs); TryAgainVbs -> next_loop_varbinds({subagent, SAPid, SAOid, TryAgainVbs}, [EndOfVb, Vb | Vbs], - MibView, Res, []) + MibView, Res, [], + GbMaxVBs) end; false -> %% bad index from subagent @@ -2909,14 +3158,15 @@ next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, end end; next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, - [], MibView, Res, _LAVb) -> + [], MibView, Res, _LAVb, GbMaxVBs) -> ?vt("next_loop_varbinds(subagent) -> entry with" "~n SAPid: ~p" "~n SAOid: ~p", [SAPid, SAOid]), case get_next_sa(SAPid, SAOid, SAVbs, MibView) of {ok, SARes, SAEndOfMibViewVbs} -> NewRes = lists:append(SARes, Res), - next_loop_varbinds([], SAEndOfMibViewVbs, MibView, NewRes, []); + next_loop_varbinds([], SAEndOfMibViewVbs, MibView, NewRes, [], + GbMaxVBs); {noSuchName, OrgIndex} -> %% v1 reply, treat this Vb as endOfMibView, and try again for %% the others. @@ -2927,11 +3177,13 @@ next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, value = {endOfMibView, NextOid}}, case lists:delete(EVb, SAVbs) of [] -> - next_loop_varbinds([], [EndOfVb], MibView, Res, []); + next_loop_varbinds([], [EndOfVb], MibView, Res, [], + GbMaxVBs); TryAgainVbs -> next_loop_varbinds({subagent, SAPid, SAOid, TryAgainVbs}, - [EndOfVb], MibView, Res, []) + [EndOfVb], MibView, Res, [], + GbMaxVBs) end; false -> %% bad index from subagent @@ -2944,12 +3196,15 @@ next_loop_varbinds({subagent, SAPid, SAOid, SAVbs}, [ErrorStatus,OrgIndex]), {ErrorStatus, OrgIndex, []} end; -next_loop_varbinds([], [], _MibView, Res, _LAVb) -> +next_loop_varbinds([], [], _MibView, Res, _LAVb, _GbMaxVBs) -> ?vt("next_loop_varbinds -> entry when done", []), {noError, 0, Res}. try_get_instance(_Vb, #me{mfa = {M, F, A}, asn1_type = ASN1Type}) -> - ?vtrace("try get instance from <~p,~p,~p>",[M,F,A]), + ?vtrace("try_get_instance -> entry with" + "~n M: ~p" + "~n F: ~p" + "~n A: ~p", [M,F,A]), Result = (catch dbg_apply(M, F, [get | A])), % mib shall return {value, <a-nice-value-within-range>} | % {noValue, noSuchName} (v1) | @@ -2960,6 +3215,7 @@ try_get_instance(_Vb, #me{mfa = {M, F, A}, asn1_type = ASN1Type}) -> tab_oid([]) -> [0]; tab_oid(X) -> X. + %%----------------------------------------------------------------- %% Perform a next, using the varbinds Oid if value is simple %% value. If value is {endOf<something>, NextOid}, use NextOid. @@ -3206,22 +3462,30 @@ next_oid(Oid) -> %%%----------------------------------------------------------------- %%% 5. GET-BULK REQUEST +%%% +%%% In order to prevent excesses in reply sizes there are two +%%% preventive methods in place. One is to check that the encode +%%% size does not exceed Max PDU size (this is mentioned in the +%%% standard). The other is a simple VBs limit. That is, the +%%% resulting response cannot contain more then this number of VBs. %%%----------------------------------------------------------------- -do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds) -> - ?vtrace("do get bulk: start with" + +do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds, GbMaxVBs) -> + ?vtrace("do_get_bulk -> entry with" "~n MibView: ~p" "~n NonRepeaters: ~p" "~n MaxRepetitions: ~p" "~n PduMS: ~p" - "~n Varbinds: ~p", - [MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds]), + "~n Varbinds: ~p" + "~n GbMaxVBs: ~p", + [MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds, GbMaxVBs]), {NonRepVbs, RestVbs} = split_vbs(NonRepeaters, Varbinds, []), - ?vt("do get bulk -> split: " + ?vt("do_get_bulk -> split: " "~n NonRepVbs: ~p" "~n RestVbs: ~p", [NonRepVbs, RestVbs]), - case do_get_next(MibView, NonRepVbs) of - {noError, 0, UResNonRepVbs} -> - ?vt("do get bulk -> next: " + case do_get_next(MibView, NonRepVbs, GbMaxVBs) of + {noError, 0, UResNonRepVbs} -> + ?vt("do_get_bulk -> next noError: " "~n UResNonRepVbs: ~p", [UResNonRepVbs]), ResNonRepVbs = lists:keysort(#varbind.org_index, UResNonRepVbs), %% Decode the first varbinds, produce a reversed list of @@ -3231,11 +3495,12 @@ do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds) -> user_err("failed encoding varbind ~w:~n~p", [Idx, Reason]), {genErr, Idx, []}; {SizeLeft, Res} when is_integer(SizeLeft) and is_list(Res) -> - ?vtrace("do get bulk -> encoded: " + ?vtrace("do_get_bulk -> encoded: " "~n SizeLeft: ~p" "~n Res: ~w", [SizeLeft, Res]), case (catch do_get_rep(SizeLeft, MibView, MaxRepetitions, - RestVbs, Res)) of + RestVbs, Res, + length(UResNonRepVbs), GbMaxVBs)) of {error, Idx, Reason} -> user_err("failed encoding varbind ~w:~n~p", [Idx, Reason]), @@ -3244,6 +3509,10 @@ do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds) -> ?vtrace("do get bulk -> Res: " "~n ~w", [Res]), {noError, 0, conv_res(Res)}; + {noError, 0, Data} = OK -> + ?vtrace("do get bulk -> OK: " + "~n length(Data): ~w", [length(Data)]), + OK; Else -> ?vtrace("do get bulk -> Else: " "~n ~w", [Else]), @@ -3252,6 +3521,7 @@ do_get_bulk(MibView, NonRepeaters, MaxRepetitions, PduMS, Varbinds) -> Res when is_list(Res) -> {noError, 0, conv_res(Res)} end; + {ErrorStatus, Index, _} -> ?vdebug("do get bulk: " "~n ErrorStatus: ~p" @@ -3301,11 +3571,12 @@ enc_vbs(SizeLeft, Vbs) -> end, lists:foldl(Fun, {SizeLeft, []}, Vbs). -do_get_rep(Sz, MibView, MaxRepetitions, Varbinds, Res) +do_get_rep(Sz, MibView, MaxRepetitions, Varbinds, Res, GbNumVBs, GbMaxVBs) when MaxRepetitions >= 0 -> - do_get_rep(Sz, MibView, 0, MaxRepetitions, Varbinds, Res); -do_get_rep(Sz, MibView, _MaxRepetitions, Varbinds, Res) -> - do_get_rep(Sz, MibView, 0, 0, Varbinds, Res). + do_get_rep(Sz, MibView, 0, MaxRepetitions, Varbinds, Res, + GbNumVBs, GbMaxVBs); +do_get_rep(Sz, MibView, _MaxRepetitions, Varbinds, Res, GbNumVBs, GbMaxVBs) -> + do_get_rep(Sz, MibView, 0, 0, Varbinds, Res, GbNumVBs, GbMaxVBs). conv_res(ResVarbinds) -> conv_res(ResVarbinds, []). @@ -3314,22 +3585,30 @@ conv_res([VbListOfBytes | T], Bytes) -> conv_res([], Bytes) -> Bytes. -do_get_rep(_Sz, _MibView, Max, Max, _, Res) -> +%% The only other value, then a positive integer, is infinity. +do_get_rep(_Sz, _MibView, Count, Max, _, _Res, GbNumVBs, GbMaxVBs) + when (is_integer(GbMaxVBs) andalso (GbNumVBs > GbMaxVBs)) -> + ?vinfo("Max Get-BULK VBs limit (~w) exceeded (~w) when:" + "~n Count: ~p" + "~n Max: ~p", [GbMaxVBs, GbNumVBs, Count, Max]), + {tooBig, 0, []}; +do_get_rep(_Sz, _MibView, Max, Max, _, Res, _GbNumVBs, _GbMaxVBs) -> ?vt("do_get_rep -> done when: " "~n Res: ~p", [Res]), {noError, 0, conv_res(Res)}; -do_get_rep(Sz, MibView, Count, Max, Varbinds, Res) -> +do_get_rep(Sz, MibView, Count, Max, Varbinds, Res, GbNumVBs, GbMaxVBs) -> ?vt("do_get_rep -> entry when: " "~n Sz: ~p" "~n Count: ~p" "~n Res: ~w", [Sz, Count, Res]), - case try_get_bulk(Sz, MibView, Varbinds) of + case try_get_bulk(Sz, MibView, Varbinds, GbMaxVBs) of {noError, NextVarbinds, SizeLeft, Res2} -> ?vt("do_get_rep -> noError: " "~n SizeLeft: ~p" "~n Res2: ~p", [SizeLeft, Res2]), do_get_rep(SizeLeft, MibView, Count+1, Max, NextVarbinds, - Res2 ++ Res); + Res2 ++ Res, + GbNumVBs + length(Varbinds), GbMaxVBs); {endOfMibView, _NextVarbinds, _SizeLeft, Res2} -> ?vt("do_get_rep -> endOfMibView: " "~n Res2: ~p", [Res2]), @@ -3341,22 +3620,29 @@ do_get_rep(Sz, MibView, Count, Max, Varbinds, Res) -> {ErrorStatus, Index, []} end. -try_get_bulk(Sz, MibView, Varbinds) -> +org_index_sort_vbs(Vbs) -> + lists:keysort(#varbind.org_index, Vbs). + +try_get_bulk(Sz, MibView, Varbinds, GbMaxVBs) -> ?vt("try_get_bulk -> entry with" - "~n Sz: ~w", [Sz]), - case do_get_next(MibView, Varbinds) of + "~n Sz: ~w" + "~n MibView: ~w" + "~n Varbinds: ~w", [Sz, MibView, Varbinds]), + case do_get_next(MibView, Varbinds, GbMaxVBs) of {noError, 0, UNextVarbinds} -> - ?vt("try_get_bulk -> noError", []), - NextVarbinds = lists:keysort(#varbind.org_index, UNextVarbinds), + ?vt("try_get_bulk -> noError: " + "~n UNextVarbinds: ~p", [UNextVarbinds]), + NextVarbinds = org_index_sort_vbs(UNextVarbinds), case (catch enc_vbs(Sz, NextVarbinds)) of {error, Idx, Reason} -> user_err("failed encoding varbind ~w:~n~p", [Idx, Reason]), - ?vtrace("try_get_bulk -> error: " + ?vtrace("try_get_bulk -> encode error: " "~n Idx: ~p" "~n Reason: ~p", [Idx, Reason]), {genErr, Idx}; - {SizeLeft, Res} when is_integer(SizeLeft) andalso is_list(Res) -> - ?vt("try get bulk -> " + {SizeLeft, Res} when is_integer(SizeLeft) andalso + is_list(Res) -> + ?vt("try get bulk -> encode ok: " "~n SizeLeft: ~w" "~n Res: ~w", [SizeLeft, Res]), {check_end_of_mibview(NextVarbinds), @@ -3367,9 +3653,9 @@ try_get_bulk(Sz, MibView, Varbinds) -> {endOfMibView, [], 0, Res} end; {ErrorStatus, Index, _} -> - ?vt("try get bulk: " + ?vt("try_get_bulk -> error: " "~n ErrorStatus: ~p" - "~n Index: ~p",[ErrorStatus, Index]), + "~n Index: ~p", [ErrorStatus, Index]), {ErrorStatus, Index} end. @@ -3510,9 +3796,8 @@ get_err({ErrC, ErrI, Vbs}) -> {get_err_i(ErrC), ErrI, Vbs}. get_err_i(noError) -> noError; -get_err_i(S) -> - ?vtrace("convert '~p' to 'genErr'",[S]), - genErr. +get_err_i(tooBig) -> tooBig; % OTP-9700 +get_err_i(ES) -> ?vtrace("convert ErrorStatus '~p' to 'genErr'", [ES]), genErr. v2err_to_v1err(noError) -> noError; v2err_to_v1err(noAccess) -> noSuchName; @@ -4001,6 +4286,9 @@ get_multi_threaded(Opts) -> get_versions(Opts) -> get_option(versions, Opts, [v1,v2,v3]). +get_gb_max_vbs(Opts) -> + get_option(gb_max_vbs, Opts, infinity). + get_note_store_opt(Opts) -> get_option(note_store, Opts, []). |