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-rw-r--r--lib/snmp/src/misc/snmp_pdus.erl100
1 files changed, 63 insertions, 37 deletions
diff --git a/lib/snmp/src/misc/snmp_pdus.erl b/lib/snmp/src/misc/snmp_pdus.erl
index 0788d86b2d..e15be4a298 100644
--- a/lib/snmp/src/misc/snmp_pdus.erl
+++ b/lib/snmp/src/misc/snmp_pdus.erl
@@ -254,68 +254,87 @@ strip(0, _Tail) ->
%%----------------------------------------------------------------------
%% Returns:{Type, Value}
%%----------------------------------------------------------------------
+
+%% OBJECT IDENTIFIER
dec_value([6 | Bytes]) ->
{Value, Rest} = dec_oid_notag(Bytes),
{{'OBJECT IDENTIFIER', Value}, Rest};
dec_value([5,0 | T]) ->
{{'NULL', 'NULL'}, T};
+
+%% INTEGER
dec_value([2 | Bytes]) ->
{Value, Rest} = dec_integer_notag(Bytes),
{{'INTEGER', Value}, Rest};
+
+%% OCTET STRING
dec_value([4 | Bytes]) ->
{Value, Rest} = dec_oct_str_notag(Bytes),
{{'OCTET STRING', Value}, Rest};
+
+%% IpAddress
dec_value([64 | Bytes]) ->
{Value, Rest} = dec_oct_str_notag(Bytes),
{{'IpAddress', Value}, Rest};
+
+%% Counter32
dec_value([65 | Bytes]) ->
%% Counter32 is an unsigned 32 but is actually encoded as
%% a signed integer 32 (INTEGER).
{Value, Rest} = dec_integer_notag(Bytes),
Value2 =
- if
- (Value >= 0) andalso (Value =< 16#ffffffff) ->
- %% We accept value above 16#7fffffff
- %% in order to be backward bug-compatible
- Value;
- (Value < 0) ->
- 16#ffffffff + Value + 1;
- true ->
- exit({error, {bad_counter32, Value}})
- end,
+ if
+ (Value >= 0) andalso (Value =< 16#ffffffff) ->
+ %% We accept value above 16#7fffffff
+ %% in order to be backward bug-compatible
+ Value;
+ (Value < 0) ->
+ 16#ffffffff + Value + 1;
+ true ->
+ exit({error, {bad_counter32, Value}})
+ end,
{{'Counter32', Value2}, Rest};
+
+%% Unsigned32
dec_value([66 | Bytes]) ->
{Value, Rest} = dec_integer_notag(Bytes),
if
- (Value >= 0) andalso (Value =< 4294967295) ->
- {{'Unsigned32', Value}, Rest};
- true ->
- exit({error, {bad_unsigned32, Value}})
+ (Value >= 0) andalso (Value =< 16#ffffffff) ->
+ {{'Unsigned32', Value}, Rest};
+ true ->
+ exit({error, {bad_unsigned32, Value}})
end;
+
+%% TimeTicks
dec_value([67 | Bytes]) ->
{Value, Rest} = dec_integer_notag(Bytes),
- if
- (Value >= 0) andalso (Value =< 4294967295) ->
+ if
+ (Value >= 0) andalso (Value =< 16#ffffffff) ->
{{'TimeTicks', Value}, Rest};
true ->
exit({error, {bad_timeticks, Value}})
end;
+
+%% Opaque
dec_value([68 | Bytes]) ->
{Value, Rest} = dec_oct_str_notag(Bytes),
{{'Opaque', Value}, Rest};
+
+%% Counter64
dec_value([70 | Bytes]) ->
%% Counter64 is an unsigned 64 but is actually encoded as
%% a signed integer 64.
{Value, Rest} = dec_integer_notag(Bytes),
Value2 =
- if
- (Value >= 0) andalso (Value < 16#8000000000000000) ->
- Value;
- (Value < 0) ->
- 18446744073709551615 + Value + 1;
- true ->
- exit({error, {bad_counter64, Value}}) end,
+ if
+ (Value >= 0) andalso (Value < 16#8000000000000000) ->
+ Value;
+ (Value < 0) ->
+ 16#ffffffffffffffff + Value + 1;
+ true ->
+ exit({error, {bad_counter64, Value}}) end,
{{'Counter64', Value2}, Rest};
+
dec_value([128,0|T]) ->
{{'NULL', noSuchObject}, T};
dec_value([129,0|T]) ->
@@ -629,7 +648,7 @@ enc_VarBind_attributes(#varbind{oid = Oid, variabletype = Type,value = Val}) ->
ValueBytes = enc_value(Type, Val),
lists:append(OidBytes, ValueBytes).
-enc_value('INTEGER',Val) ->
+enc_value('INTEGER', Val) ->
enc_integer_tag(Val);
enc_value('OCTET STRING', Val) ->
enc_oct_str_tag(Val);
@@ -637,7 +656,7 @@ enc_value('BITS', Val) ->
enc_oct_str_tag(bits_to_str(Val));
enc_value('OBJECT IDENTIFIER', Val) ->
enc_oid_tag(Val);
-enc_value('IpAddress',Val) ->
+enc_value('IpAddress', Val) ->
Bytes2 = enc_oct_str_notag(Val),
Len2 = elength(length(Bytes2)),
lists:append([64 | Len2],Bytes2);
@@ -668,6 +687,24 @@ enc_value('Counter32', Val) ->
Bytes2 = enc_integer_notag(Val2),
Len2 = elength(length(Bytes2)),
lists:append([65 | Len2],Bytes2);
+enc_value('Unsigned32', Val) ->
+ if
+ (Val >= 0) andalso (Val =< 4294967295) ->
+ Bytes2 = enc_integer_notag(Val),
+ Len2 = elength(length(Bytes2)),
+ lists:append([66 | Len2], Bytes2);
+ true ->
+ exit({error, {bad_counter32, Val}})
+ end;
+enc_value('TimeTicks', Val) ->
+ if
+ (Val >= 0) andalso (Val =< 4294967295) ->
+ Bytes2 = enc_integer_notag(Val),
+ Len2 = elength(length(Bytes2)),
+ lists:append([67 | Len2], Bytes2);
+ true ->
+ exit({error, {bad_timeticks, Val}})
+ end;
enc_value('Counter64', Val) ->
Val2 =
if
@@ -682,18 +719,7 @@ enc_value('Counter64', Val) ->
end,
Bytes2 = enc_integer_notag(Val2),
Len2 = elength(length(Bytes2)),
- lists:append([70 | Len2],Bytes2);
-enc_value(Type, Val) ->
- Bytes2 = enc_integer_notag(Val),
- Len2 = elength(length(Bytes2)),
- lists:append([enc_val_tag(Type,Val) | Len2],Bytes2).
-
-enc_val_tag('Counter32',Val) when (Val >= 0) andalso (Val =< 4294967295) ->
- 65;
-enc_val_tag('Unsigned32', Val) when (Val >= 0) andalso (Val =< 4294967295) ->
- 66;
-enc_val_tag('TimeTicks', Val) when (Val >= 0) andalso (Val =< 4294967295) ->
- 67.
+ lists:append([70 | Len2],Bytes2).
%%----------------------------------------------------------------------