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-rw-r--r--lib/snmp/doc/src/notes.xml9
-rw-r--r--lib/snmp/src/app/snmp.appup.src4
-rw-r--r--lib/snmp/src/misc/snmp_pdus.erl44
-rw-r--r--lib/snmp/test/snmp_pdus_test.erl55
4 files changed, 101 insertions, 11 deletions
diff --git a/lib/snmp/doc/src/notes.xml b/lib/snmp/doc/src/notes.xml
index 269a227530..c1debd42b1 100644
--- a/lib/snmp/doc/src/notes.xml
+++ b/lib/snmp/doc/src/notes.xml
@@ -44,6 +44,15 @@
-->
<list type="bulleted">
<item>
+ <p>Fixed endode/decode of values of type <c>Counter32</c>. </p>
+ <p>This type (<c>Counter32</c>) is an unsigned integer 32,
+ but is actually encoded as an signed integer 32.
+ The encode/decode functions however, treated it as if it was
+ encodeded as an unsigned integer 32. </p>
+ <p>Own Id: OTP-9022</p>
+ </item>
+
+ <item>
<p>[agent] Added support for sending traps to IPv6 targets. </p>
<p>See the
<seealso marker="snmp_agent_config_files#target_addr">target address config file</seealso>,
diff --git a/lib/snmp/src/app/snmp.appup.src b/lib/snmp/src/app/snmp.appup.src
index f931b14338..5deb40be0f 100644
--- a/lib/snmp/src/app/snmp.appup.src
+++ b/lib/snmp/src/app/snmp.appup.src
@@ -29,6 +29,7 @@
{load_module, snmpa_usm, soft_purge, soft_purge, []},
{load_module, snmpm_usm, soft_purge, soft_purge, []},
{load_module, snmp_log, soft_purge, soft_purge, []},
+ {load_module, snmp_pdus, soft_purge, soft_purge, []},
{load_module, snmp_conf, soft_purge, soft_purge, []},
{load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]},
{load_module, snmp_misc, soft_purge, soft_purge, []},
@@ -61,6 +62,7 @@
{load_module, snmpm_usm, soft_purge, soft_purge, []},
{load_module, snmp_misc, soft_purge, soft_purge, []},
{load_module, snmp_log, soft_purge, soft_purge, []},
+ {load_module, snmp_pdus, soft_purge, soft_purge, []},
{load_module, snmp_conf, soft_purge, soft_purge, []},
{load_module, snmp_config, soft_purge, soft_purge, [snmp_conf]},
{load_module, snmpa_conf, soft_purge, soft_purge, []},
@@ -114,6 +116,7 @@
{load_module, snmpa_usm, soft_purge, soft_purge, []},
{load_module, snmpm_usm, soft_purge, soft_purge, []},
{load_module, snmp_log, soft_purge, soft_purge, []},
+ {load_module, snmp_pdus, soft_purge, soft_purge, []},
{load_module, snmp_conf, soft_purge, soft_purge, []},
{load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]},
{load_module, snmp_misc, soft_purge, soft_purge, []},
@@ -148,6 +151,7 @@
{load_module, snmpm_usm, soft_purge, soft_purge, []},
{load_module, snmp_misc, soft_purge, soft_purge, []},
{load_module, snmp_log, soft_purge, soft_purge, []},
+ {load_module, snmp_pdus, soft_purge, soft_purge, []},
{load_module, snmp_conf, soft_purge, soft_purge, []},
{load_module, snmpa_conf, soft_purge, soft_purge, [snmp_conf]},
{load_module, snmp_config, soft_purge, soft_purge, []},
diff --git a/lib/snmp/src/misc/snmp_pdus.erl b/lib/snmp/src/misc/snmp_pdus.erl
index dc8900c8cd..82618a0b86 100644
--- a/lib/snmp/src/misc/snmp_pdus.erl
+++ b/lib/snmp/src/misc/snmp_pdus.erl
@@ -269,24 +269,35 @@ dec_value([64 | Bytes]) ->
{Value, Rest} = dec_oct_str_notag(Bytes),
{{'IpAddress', Value}, Rest};
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),
- if Value >= 0, Value =< 4294967295 ->
- {{'Counter32', Value}, Rest};
- true ->
- exit({error, {bad_counter32, Value}})
- end;
+ 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,
+ {{'Counter32', Value2}, Rest};
dec_value([66 | Bytes]) ->
{Value, Rest} = dec_integer_notag(Bytes),
- if Value >= 0, Value =< 4294967295 ->
+ if
+ (Value >= 0) andalso (Value =< 4294967295) ->
{{'Unsigned32', Value}, Rest};
- true ->
+ true ->
exit({error, {bad_unsigned32, Value}})
end;
dec_value([67 | Bytes]) ->
{Value, Rest} = dec_integer_notag(Bytes),
- if Value >= 0, Value =< 4294967295 ->
+ if
+ (Value >= 0) andalso (Value =< 4294967295) ->
{{'TimeTicks', Value}, Rest};
- true ->
+ true ->
exit({error, {bad_timeticks, Value}})
end;
dec_value([68 | Bytes]) ->
@@ -642,6 +653,21 @@ enc_value(_Type, endOfMibView) ->
[130,0];
enc_value('NULL', _Val) ->
[5,0];
+enc_value('Counter32', Val) ->
+ Val2 =
+ if
+ Val > 16#ffffffff ->
+ exit({error, {bad_counter32, Val}});
+ Val >= 16#80000000 ->
+ (Val band 16#7fffffff) - 16#80000000;
+ Val >= 0 ->
+ Val;
+ true ->
+ exit({error, {bad_counter32, Val}})
+ end,
+ Bytes2 = enc_integer_notag(Val2),
+ Len2 = elength(length(Bytes2)),
+ lists:append([65 | Len2],Bytes2);
enc_value('Counter64', Val) ->
Val2 =
if
diff --git a/lib/snmp/test/snmp_pdus_test.erl b/lib/snmp/test/snmp_pdus_test.erl
index ef510ad62e..197797c816 100644
--- a/lib/snmp/test/snmp_pdus_test.erl
+++ b/lib/snmp/test/snmp_pdus_test.erl
@@ -38,6 +38,8 @@
otp7575/1,
otp8563/1,
+ otp9022/1,
+
init_per_testcase/2, end_per_testcase/2
]).
@@ -75,7 +77,7 @@ all() ->
[{group, tickets}].
groups() ->
- [{tickets, [], [otp7575, otp8563]}].
+ [{tickets, [], [otp7575, otp8563, otp9022]}].
init_per_group(_GroupName, Config) ->
Config.
@@ -169,7 +171,56 @@ otp8563(Config) when is_list(Config) ->
Unexpected7 ->
exit({unexpected_encode_result, Unexpected7, Val7})
end,
-
+
+ ok.
+
+
+otp9022(suite) -> [];
+otp9022(doc) -> ["OTP-9022"];
+otp9022(Config) when is_list(Config) ->
+ Val1 = 16#7fffffff,
+ io:format("try encode and decode ~w~n", [Val1]),
+ Enc1 = snmp_pdus:enc_value('Counter32', Val1),
+ {{'Counter32', Val1}, []} = snmp_pdus:dec_value(Enc1),
+
+ Val2 = Val1 + 1,
+ io:format("try encode and decode ~w~n", [Val2]),
+ Enc2 = snmp_pdus:enc_value('Counter32', Val2),
+ {{'Counter32', Val2}, []} = snmp_pdus:dec_value(Enc2),
+
+ Val3 = Val2 + 1,
+ io:format("try encode and decode ~w~n", [Val3]),
+ Enc3 = snmp_pdus:enc_value('Counter32', Val3),
+ {{'Counter32', Val3}, []} = snmp_pdus:dec_value(Enc3),
+
+ Val4 = 16#fffffffe,
+ io:format("try encode and decode ~w~n", [Val4]),
+ Enc4 = snmp_pdus:enc_value('Counter32', Val4),
+ {{'Counter32', Val4}, []} = snmp_pdus:dec_value(Enc4),
+
+ Val5 = Val4 + 1,
+ io:format("try encode and decode ~w~n", [Val5]),
+ Enc5 = snmp_pdus:enc_value('Counter32', Val5),
+ {{'Counter32', Val5}, []} = snmp_pdus:dec_value(Enc5),
+
+ Val6 = 16#ffffffff + 1,
+ io:format("try and fail to encode ~w~n", [Val6]),
+ case (catch snmp_pdus:enc_value('Counter32', Val6)) of
+ {'EXIT', {error, {bad_counter32, Val6}}} ->
+ ok;
+ Unexpected6 ->
+ exit({unexpected_encode_result, Unexpected6, Val6})
+ end,
+
+ Val7 = -1,
+ io:format("try and fail to encode ~w~n", [Val7]),
+ case (catch snmp_pdus:enc_value('Counter32', Val7)) of
+ {'EXIT', {error, {bad_counter32, Val7}}} ->
+ ok;
+ Unexpected7 ->
+ exit({unexpected_encode_result, Unexpected7, Val7})
+ end,
+
ok.
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 15:21:09 +0000