snmp: Patch 1118

    OTP-8574  The SMI specifies that an table row OID should be named:
              { "1" }. An option has been introduced, relaxed_row_name_assign_check,
              that allows for a more liberal numbering scheme.

    OTP-8594  Changes to make snmp (forward) compatible with the new version
              of the crypto application (released in R14). As of R14,
              crypto is implemented using NIFs. Also, the API is more
              strict.

    OTP-8648  [manager] Changed default value for the MIB server cache.
              Auto GC is now on by default.

    OTP-8563  Decoding of Counter64 values larger then 9306882749598007295
              fails. Counter64 is encoded as an 64 bit signed integer,
              but is actually an unsigned integer, which the decoder does
              not take into account.

    OTP-8595  [compiler] Fails to compile non-contiguous BITS. Per Hedeland

    OTP-8646  [manager] Raise condition causing the manager server process
              to crash. Unregistering an agent while traffic (set/get-operations)
              is ongoing could cause a crash in the manager server process
              (raise condition).

1 files changed, 36 insertions, 15 deletions

diff --git a/lib/snmp/src/misc/snmp_pdus.erl b/lib/snmp/src/misc/snmp_pdus.erl
index 6c80fc3876..dc8900c8cd 100644
--- a/lib/snmp/src/misc/snmp_pdus.erl
+++ b/lib/snmp/src/misc/snmp_pdus.erl
@@ -1,19 +1,19 @@
 %% 
 %% %CopyrightBegin%
-%% 
-%% Copyright Ericsson AB 1996-2009. All Rights Reserved.
-%% 
+%%
+%% Copyright Ericsson AB 1996-2010. 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/.
-%% 
+%%
 %% 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.
-%% 
+%%
 %% %CopyrightEnd%
 %% 
 
@@ -38,7 +38,10 @@
 	 dec_usm_security_parameters/1,
 	 strip_encrypted_scoped_pdu_data/1,
 	 octet_str_to_bits/1, bits_to_str/1,
-	 get_encoded_length/1]).
+	 get_encoded_length/1,
+	 enc_value/2, dec_value/1]).
+
+%% -compile(export_all).
 
 %% Returns the number of octets required to encode Length.
 get_encoded_length(Length) ->
@@ -290,12 +293,18 @@ dec_value([68 | Bytes]) ->
     {Value, Rest} = dec_oct_str_notag(Bytes),
     {{'Opaque', Value}, Rest};
 dec_value([70 | Bytes]) ->
+    %% Counter64 is an unsigned 64 but is actually encoded as 
+    %% a signed integer 64.
     {Value, Rest} = dec_integer_notag(Bytes),
-    if Value >= 0, Value =< 18446744073709551615 ->
-	    {{'Counter64', Value}, Rest};
-       true ->
-	    exit({error, {bad_counter64, Value}})
-    end;
+    Value2 = 
+	if
+	    (Value >= 0) andalso (Value < 16#8000000000000000) ->
+		Value;
+	    (Value < 0) ->
+		18446744073709551615 + 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]) ->
@@ -633,6 +642,21 @@ enc_value(_Type, endOfMibView) ->
     [130,0];
 enc_value('NULL', _Val) ->
     [5,0];
+enc_value('Counter64', Val) ->
+    Val2 = 
+	if
+	    Val > 16#ffffffffffffffff ->
+		exit({error, {bad_counter64, Val}});
+	    Val >= 16#8000000000000000 ->
+		(Val band 16#7fffffffffffffff) - 16#8000000000000000;
+	    Val >= 0 ->
+		Val;
+	    true ->
+		exit({error, {bad_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)),
@@ -643,10 +667,7 @@ enc_val_tag('Counter32',Val) when (Val >= 0) andalso (Val =< 4294967295) ->
 enc_val_tag('Unsigned32', Val) when (Val >= 0) andalso (Val =< 4294967295) ->
     66;
 enc_val_tag('TimeTicks', Val) when (Val >= 0) andalso (Val =< 4294967295) ->
-    67;
-enc_val_tag('Counter64', Val) when ((Val >= 0) andalso 
-				    (Val =< 18446744073709551615)) ->
-    70.
+    67.
 
 
 %%----------------------------------------------------------------------