diff options
Diffstat (limited to 'lib/snmp/src/misc/snmp_pdus.erl')
| -rw-r--r-- | lib/snmp/src/misc/snmp_pdus.erl | 110 |
1 files changed, 72 insertions, 38 deletions
diff --git a/lib/snmp/src/misc/snmp_pdus.erl b/lib/snmp/src/misc/snmp_pdus.erl index 0788d86b2d..5b8be90a71 100644 --- a/lib/snmp/src/misc/snmp_pdus.erl +++ b/lib/snmp/src/misc/snmp_pdus.erl @@ -254,68 +254,95 @@ 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 + 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), + 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}}) + exit({error, {bad_unsigned32, Value}}) end, - {{'Counter32', Value2}, Rest}; -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}}) - end; + {{'Unsigned32', Value2}, Rest}; + +%% TimeTicks dec_value([67 | Bytes]) -> {Value, Rest} = dec_integer_notag(Bytes), - if - (Value >= 0) andalso (Value =< 4294967295) -> - {{'TimeTicks', Value}, Rest}; + Value2 = + if + (Value >= 0) andalso (Value =< 16#ffffffff) -> + Value; + (Value < 0) -> + 16#ffffffff + Value + 1; true -> exit({error, {bad_timeticks, Value}}) - end; + end, + {{'TimeTicks', Value2}, Rest}; + +%% 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 +656,7 @@ 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 +664,7 @@ 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 +695,24 @@ 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 +727,7 @@ 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). %%---------------------------------------------------------------------- |