1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1996-2009. 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(snmpa_svbl).
-include("snmp_types.hrl").
-define(VMODULE,"SVBL").
-include("snmp_verbosity.hrl").
-export([sort_varbindlist/2, sort_varbinds_rows/1, sa_split/1,
delete_org_index/1, col_to_orgindex/2]).
%%-----------------------------------------------------------------
%% Func: sort_varbindlist/2
%% Args: Varbinds is a list of #varbind
%% Purpose: Group all variablebindings that corresponds to logically
%% the same entity, i.e. group all plain variables, all
%% table operations for each table, all varbinds to each
%% subagent.
%% Returns: {VarbindsForThisAgent
%% VarbindsForSubAgents} where
%% VarbindsForThisAgent = List of {TableOid, List of #ivarbinds} |
%% #ivarbinds
%% VarbindsForSubAgents = List of {SubAgentPid,
%% List of {SAOid, #varbinds}}
%%-----------------------------------------------------------------
sort_varbindlist(Mib, Varbinds) ->
{Vars, Tabs, Subagents} = partition(Mib, Varbinds),
{lists:append(Tabs, Vars), Subagents}.
partition(Mib, Vbs) ->
partition(Mib, Vbs, [], [], []).
partition(Mib, [Varbind | Vbs], Vars, Tabs, Subs) ->
#varbind{oid = Oid} = Varbind,
?vtrace("partition -> Oid: ~p", [Oid]),
case snmpa_mib:lookup(Mib, Oid) of
{table_column, MibEntry, TableOid} ->
IVarbind = #ivarbind{varbind = fix_bits(Varbind, MibEntry),
mibentry = MibEntry},
NewTabs = insert_key(TableOid, IVarbind, Tabs),
partition(Mib, Vbs, Vars, NewTabs, Subs);
{subagent, SubagentPid, SAOid} ->
NewSubs = insert_key(SubagentPid, {SAOid, Varbind}, Subs),
partition(Mib, Vbs, Vars, Tabs, NewSubs);
{variable, MibEntry} ->
IVarbind = #ivarbind{varbind = fix_bits(Varbind, MibEntry),
mibentry = MibEntry},
partition(Mib, Vbs, [IVarbind | Vars], Tabs, Subs);
{false, ErrorCode} -> % ErrorCode = noSuchObject | noSuchInstance
IVarbind = #ivarbind{status = ErrorCode, varbind = Varbind},
partition(Mib, Vbs, [IVarbind | Vars], Tabs, Subs)
end;
partition(_Mib, [], Vars, Subs, Tabs) ->
{Vars, Subs, Tabs}.
% fix_bits(#varbind{bertype = 'BITS',
% variabletype = 'OCTET STRING',
% value = V} = VarBind, #me{asn1_type = A}) ->
% VarBind#varbind{variabletype = 'BITS',
% value = snmp_pdus:octet_str_to_bits(V)};
fix_bits(VarBind, #me{asn1_type=A})
when ((A#asn1_type.bertype =:= 'BITS') andalso
(VarBind#varbind.variabletype =:= 'OCTET STRING') andalso
is_list(VarBind#varbind.value)) ->
VarBind#varbind{variabletype = 'BITS',
value = snmp_pdus:octet_str_to_bits(VarBind#varbind.value)};
fix_bits(Vb,_me) -> Vb.
insert_key(Key, Value, [{Key, Values} | Rest]) ->
[{Key, [Value | Values]} | Rest];
insert_key(Key, Value, [{KeyX, Values} | Rest]) ->
[{KeyX, Values} | insert_key(Key, Value, Rest)];
insert_key(Key, Value, []) ->
[{Key, [Value]}].
%%-----------------------------------------------------------------
%% Tranforms a list of {Oid, Vb} to a 2-tuple with all
%% Oids and all Vbs. These lists will be reversed.
%%-----------------------------------------------------------------
sa_split(Vbs) -> sa_split(Vbs, [], []).
sa_split([{SAOid, Vb} | T], Oids, Vbs) ->
sa_split(T, [SAOid | Oids], [Vb | Vbs]);
sa_split([], Oids, Vbs) ->
{Oids, Vbs}.
%%-----------------------------------------------------------------
%% Func: sort_varbinds_rows/1
%% Args: Varbinds is a list of {Oid, Value}.
%% Pre: Varbinds is for one table.
%% Purpose: Sorts all varbinds in Oid order, and in row order.
%% Returns: list of Row where
%% Row = {Indexes, List of Col} and
%% Col = {ColNo, Value, OrgIndex} and
%% OrgIndex is index in original varbind list.
%%-----------------------------------------------------------------
sort_varbinds_rows(Varbinds) ->
P = pack(Varbinds),
S = lists:keysort(1, P),
unpack(S).
%% In: list of {Oid, Value}
%% Out: list of {{Indexes_for_row, Col}, Val, Index}
pack(V) -> pack(1, V).
pack(Index, [{[Col | Rest], Val} | T]) ->
[{{Rest, Col}, Val, Index} | pack(Index+1, T)];
pack(_, []) -> [].
unpack([{{Rest, Col}, Val, Index} | T]) ->
unpack(Rest, [[{Col, Val, Index}]], T);
unpack([]) -> [].
unpack(Rest, [Row | Rows], [{{Rest, Col}, Val, Index} | T]) ->
unpack(Rest, [[{Col, Val, Index} | Row] | Rows], T);
unpack(Rest, [Row | Rows], [{{Rest2, Col}, Val, Index} | T]) ->
unpack(Rest2, [[{Col, Val, Index}],
{Rest, lists:reverse(Row)} | Rows], T);
unpack(Rest, [Row | Rows], []) ->
NewRow = {Rest, lists:reverse(Row)},
lists:reverse([NewRow | Rows]).
%% OrgIndex should not be present when we call the is_set_ok/set/undo
%% table functions. They just see the list of cols, and if an error
%% occurs, they return the column nunber.
%% Also, delete duplicate columns. If a SET is performed with duplicate
%% columns, it is undefined which column to use. We just pick one.
delete_org_index([{RowIndex, Cols} | Rows]) ->
[{RowIndex, doi(Cols)} | delete_org_index(Rows)];
delete_org_index([]) -> [].
doi([{Col, Val, OrgIndex}, {Col, _Val, _OrgIndex} | T]) ->
doi([{Col, Val, OrgIndex} | T]);
doi([{Col, Val, _OrgIndex} | T]) ->
[{Col, Val} | doi(T)];
doi([]) -> [].
%% Maps the column number to OrgIndex.
col_to_orgindex(0, _) -> 0;
col_to_orgindex(Col, [{Col, _Val, OrgIndex}|_]) ->
OrgIndex;
col_to_orgindex(Col, [_|Cols]) ->
col_to_orgindex(Col, Cols);
col_to_orgindex(BadCol, _) ->
{false, BadCol}.
|
