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-rw-r--r--lib/snmp/src/agent/snmpa_mpd.erl160
1 files changed, 95 insertions, 65 deletions
diff --git a/lib/snmp/src/agent/snmpa_mpd.erl b/lib/snmp/src/agent/snmpa_mpd.erl
index 2d37ea56f0..b440d57d03 100644
--- a/lib/snmp/src/agent/snmpa_mpd.erl
+++ b/lib/snmp/src/agent/snmpa_mpd.erl
@@ -1,18 +1,19 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1997-2012. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2015. 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/.
+%% 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
%%
-%% 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.
+%% 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%
%%
@@ -20,7 +21,7 @@
-export([init/1, reset/0, inc/1, counters/0,
discarded_pdu/1,
- process_packet/6, process_packet/7,
+ process_packet/5, process_packet/6, process_packet/7,
generate_response_msg/5, generate_response_msg/6,
generate_msg/5, generate_msg/6,
generate_discovery_msg/4,
@@ -75,8 +76,9 @@
init(Vsns) ->
?vlog("init -> entry with"
"~n Vsns: ~p", [Vsns]),
- {A,B,C} = erlang:now(),
- random:seed(A,B,C),
+ random:seed(erlang:phash2([node()]),
+ erlang:monotonic_time(),
+ erlang:unique_integer()),
ets:insert(snmp_agent_table, {msg_id, random:uniform(2147483647)}),
ets:insert(snmp_agent_table, {req_id, random:uniform(2147483647)}),
init_counters(),
@@ -113,22 +115,30 @@ reset() ->
% length(snmp_pdus:enc_message(M)) + 4.
%%-----------------------------------------------------------------
-%% Func: process_packet(Packet, TDomain, TAddress, State, Log) ->
+%% Func: process_packet(Packet, Domain, Address, State, Log) ->
%% {ok, SnmpVsn, Pdu, PduMS, ACMData} | {discarded, Reason}
%% Types: Packet = binary()
-%% TDomain = snmpUDPDomain | transportDomain()
-%% TAddress = {Ip, Udp} (*but* depends on TDomain)
+%% Domain = snmpUDPDomain | transportDomain()
+%% Address = {Ip, Udp} (*but* depends on Domain)
%% State = #state
%% Purpose: This is the main Message Dispatching function. (see
%% section 4.2.1 in rfc2272)
%%-----------------------------------------------------------------
-process_packet(Packet, TDomain, TAddress, State, NoteStore, Log) ->
+process_packet(Packet, From, State, NoteStore, Log) ->
LocalEngineID = ?DEFAULT_LOCAL_ENGINE_ID,
- process_packet(Packet, TDomain, TAddress, LocalEngineID,
- State, NoteStore, Log).
-
-process_packet(Packet, TDomain, TAddress, LocalEngineID,
- State, NoteStore, Log) ->
+ process_packet(Packet, From, LocalEngineID, State, NoteStore, Log).
+
+process_packet(
+ Packet, Domain, Address, LocalEngineID, State, NoteStore, Log) ->
+ From = {Domain, Address},
+ process_packet(Packet, From, LocalEngineID, State, NoteStore, Log).
+
+process_packet(Packet, Domain, Address, State, NoteStore, Log)
+ when is_atom(Domain) ->
+ LocalEngineID = ?DEFAULT_LOCAL_ENGINE_ID,
+ From = {Domain, Address},
+ process_packet(Packet, From, LocalEngineID, State, NoteStore, Log);
+process_packet(Packet, From, LocalEngineID, State, NoteStore, Log) ->
inc(snmpInPkts),
case catch snmp_pdus:dec_message_only(binary_to_list(Packet)) of
@@ -136,17 +146,17 @@ process_packet(Packet, TDomain, TAddress, LocalEngineID,
when State#state.v1 =:= true ->
?vlog("v1, community: ~s", [Community]),
HS = ?empty_msg_size + length(Community),
- v1_v2c_proc('version-1', NoteStore, Community,
- TDomain, TAddress,
- LocalEngineID, Data, HS, Log, Packet);
+ v1_v2c_proc(
+ 'version-1', NoteStore, Community, From,
+ LocalEngineID, Data, HS, Log, Packet);
#message{version = 'version-2', vsn_hdr = Community, data = Data}
when State#state.v2c =:= true ->
?vlog("v2c, community: ~s", [Community]),
HS = ?empty_msg_size + length(Community),
- v1_v2c_proc('version-2', NoteStore, Community,
- TDomain, TAddress,
- LocalEngineID, Data, HS, Log, Packet);
+ v1_v2c_proc(
+ 'version-2', NoteStore, Community, From,
+ LocalEngineID, Data, HS, Log, Packet);
#message{version = 'version-3', vsn_hdr = V3Hdr, data = Data}
when State#state.v3 =:= true ->
@@ -154,9 +164,9 @@ process_packet(Packet, TDomain, TAddress, LocalEngineID,
[V3Hdr#v3_hdr.msgID,
V3Hdr#v3_hdr.msgFlags,
V3Hdr#v3_hdr.msgSecurityModel]),
- v3_proc(NoteStore, Packet,
- TDomain, TAddress,
- LocalEngineID, V3Hdr, Data, Log);
+ v3_proc(
+ NoteStore, Packet, From,
+ LocalEngineID, V3Hdr, Data, Log);
{'EXIT', {bad_version, Vsn}} ->
?vtrace("exit: bad version: ~p",[Vsn]),
@@ -183,11 +193,32 @@ discarded_pdu(Variable) -> inc(Variable).
%%-----------------------------------------------------------------
%% Handles a Community based message (v1 or v2c).
%%-----------------------------------------------------------------
-v1_v2c_proc(Vsn, NoteStore, Community, Domain,
- {Ip, Udp}, LocalEngineID,
- Data, HS, Log, Packet) ->
- TDomain = snmp_conf:mk_tdomain(Domain),
- TAddress = snmp_conf:mk_taddress(Domain, Ip, Udp),
+v1_v2c_proc(
+ Vsn, NoteStore, Community, From,
+ LocalEngineID, Data, HS, Log, Packet) ->
+ try
+ case From of
+ {D, A} when is_atom(D) ->
+ {snmp_conf:mk_tdomain(D),
+ snmp_conf:mk_taddress(D, A)};
+ {_, P} = A when is_integer(P) ->
+ {snmp_conf:mk_tdomain(),
+ snmp_conf:mk_taddress(A)}
+ end
+ of
+ {TDomain, TAddress} ->
+ v1_v2c_proc_dec(
+ Vsn, NoteStore, Community, TDomain, TAddress,
+ LocalEngineID, Data, HS, Log, Packet)
+ catch
+ _ ->
+ {discarded, {badarg, From}}
+ end.
+
+
+v1_v2c_proc_dec(
+ Vsn, NoteStore, Community, TDomain, TAddress,
+ LocalEngineID, Data, HS, Log, Packet) ->
AgentMS = get_engine_max_message_size(LocalEngineID),
MgrMS = snmp_community_mib:get_target_addr_ext_mms(TDomain, TAddress),
PduMS = case MgrMS of
@@ -214,7 +245,7 @@ v1_v2c_proc(Vsn, NoteStore, Community, Domain,
case Pdu#pdu.type of
'set-request' ->
%% Check if this message has already been processed
- Key = {agent, Ip, ReqId},
+ Key = {agent, {TDomain, TAddress}, ReqId},
case snmp_note_store:get_note(NoteStore, Key) of
undefined ->
%% Set the processed note _after_ pdu processing.
@@ -236,13 +267,7 @@ v1_v2c_proc(Vsn, NoteStore, Community, Domain,
{discarded, Reason};
_TrapPdu ->
{discarded, trap_pdu}
- end;
-v1_v2c_proc(_Vsn, _NoteStore, _Community, snmpUDPDomain, TAddress,
- _LocalEngineID, _Data, _HS, _Log, _Packet) ->
- {discarded, {badarg, TAddress}};
-v1_v2c_proc(_Vsn, _NoteStore, _Community, TDomain, _TAddress,
- _LocalEngineID, _Data, _HS, _Log, _Packet) ->
- {discarded, {badarg, TDomain}}.
+ end.
sec_model('version-1') -> ?SEC_V1;
sec_model('version-2') -> ?SEC_V2C.
@@ -252,8 +277,7 @@ sec_model('version-2') -> ?SEC_V2C.
%% Handles a SNMPv3 Message, following the procedures in rfc2272,
%% section 4.2 and 7.2
%%-----------------------------------------------------------------
-v3_proc(NoteStore, Packet, _TDomain, _TAddress, LocalEngineID,
- V3Hdr, Data, Log) ->
+v3_proc(NoteStore, Packet, _From, LocalEngineID, V3Hdr, Data, Log) ->
case (catch v3_proc(NoteStore, Packet, LocalEngineID, V3Hdr, Data, Log)) of
{'EXIT', Reason} ->
exit(Reason);
@@ -657,7 +681,7 @@ generate_response_msg(Vsn, RePdu, Type,
?SEC_USM ->
snmpa_usm
end,
- SecEngineID = LocalEngineID,
+ SecEngineID = LocalEngineID, % 3.1.1a
?vtrace("generate_response_msg -> SecEngineID: ~w", [SecEngineID]),
case (catch SecModule:generate_outgoing_msg(Message,
SecEngineID,
@@ -749,21 +773,7 @@ generate_v3_report_msg(MsgID, MsgSecurityModel, Data, LocalEngineID,
ContextEngineID, ContextName, SecData},
LocalEngineID, Log).
-%% req_id(#scopedPdu{data = #pdu{request_id = ReqId}}) ->
-%% ?vtrace("Report ReqId: ~p",[ReqId]),
-%% ReqId;
-%% req_id(_) ->
-%% 0. % RFC2572, 7.1.3.c.4
-
-%% maybe_generate_discovery1_report_msg() ->
-%% case (catch DiscoveryHandler:handle_discovery1(Ip, Udp, EngineId)) of
-%% {ok, Entry} when is_record(Entry, snmp_discovery_data1) ->
-%% ok;
-%% ignore ->
-%% ok;
-%% {error, Reason} ->
-
%% Response to stage 1 discovery message (terminating, i.e. from the manager)
generate_discovery1_report_msg(MsgID, MsgSecurityModel,
SecName, SecLevel,
@@ -999,7 +1009,7 @@ generate_discovery_msg(NoteStore, {TDomain, TAddress},
InitialUserName,
ContextName, Timeout) ->
- {ok, {_Domain, Address}} = transform_taddr(TDomain, TAddress),
+ {ok, {Domain, Address}} = transform_taddr(TDomain, TAddress),
%% 7.1.7
?vdebug("generate_discovery_msg -> 7.1.7 (~w)", [ManagerEngineID]),
@@ -1041,7 +1051,7 @@ generate_discovery_msg(NoteStore, {TDomain, TAddress},
%% Log(Packet),
inc_snmp_out_vars(Pdu),
?vdebug("generate_discovery_msg -> done", []),
- {Packet, Address};
+ {Domain, Address, Packet};
Error ->
throw(Error)
@@ -1081,8 +1091,22 @@ transform_taddr(?transportDomainUdpIpv4, [A, B, C, D, P1, P2]) ->
{ok, {Domain, Address}};
transform_taddr(?transportDomainUdpIpv4, BadAddr) ->
{error, {bad_transportDomainUdpIpv4_address, BadAddr}};
-transform_taddr(?transportDomainUdpIpv6,
- [A1, A2, A3, A4, A5, A6, A7, A8, P1, P2]) ->
+transform_taddr(
+ ?transportDomainUdpIpv6,
+ [A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, A16,
+ P1, P2]) ->
+ Domain = transportDomainUdpIpv6,
+ Addr =
+ {(A1 bsl 8) bor A2, (A3 bsl 8) bor A4,
+ (A5 bsl 8) bor A6, (A7 bsl 8) bor A8,
+ (A9 bsl 8) bor A10, (A11 bsl 8) bor A12,
+ (A13 bsl 8) bor A14, (A15 bsl 8) bor A16},
+ Port = P1 bsl 8 + P2,
+ Address = {Addr, Port},
+ {ok, {Domain, Address}};
+transform_taddr(
+ ?transportDomainUdpIpv6,
+ [A1, A2, A3, A4, A5, A6, A7, A8, P1, P2]) ->
Domain = transportDomainUdpIpv6,
Addr = {A1, A2, A3, A4, A5, A6, A7, A8},
Port = P1 bsl 8 + P2,
@@ -1171,6 +1195,9 @@ mk_v1_v2_packet_list([{Domain, Addr} | T],
%% Sending from default UDP port
inc_snmp_out_vars(Pdu),
Entry = {Domain, Addr, Packet},
+ %% It would be cleaner to return {To, Packet} to not
+ %% break the abstraction for an address on the
+ %% {Domain, Address} format.
mk_v1_v2_packet_list(T, Packet, Len, Pdu, [Entry | Acc]).
@@ -1277,6 +1304,9 @@ mk_v3_packet_entry(NoteStore, Domain, Addr,
req_id = Pdu#pdu.request_id},
snmp_note_store:set_note(NoteStore, 1500, CacheKey, CacheVal),
inc_snmp_out_vars(Pdu),
+ %% It would be cleaner to return {To, Packet} to not
+ %% break the abstraction for an address on the
+ %% {Domain, Address} format.
{ok, {Domain, Addr, Data}}
end.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 03:47:08 +0000