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authorErlang/OTP <[email protected]>2015-05-06 10:46:21 +0200
committerErlang/OTP <[email protected]>2015-05-06 10:46:21 +0200
commitf727c02b263c8e2bce48683e506e6a7da3c70a10 (patch)
treec6cb38ea42e021faf9e2d086686711d733853ed7 /lib/diameter/src/base
parent93655f538f84c156665857bce956526a1181110e (diff)
parent1732c9c9bd6b261cb18f2ff174a8c4d1b9488f3e (diff)
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Merge branch 'anders/diameter/extra_avp_bit/OTP-12642' into maint-17
* anders/diameter/extra_avp_bit/OTP-12642: Remove extra avp bit from diameter_avp decode
Diffstat (limited to 'lib/diameter/src/base')
-rw-r--r--lib/diameter/src/base/diameter_codec.erl10
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/diameter/src/base/diameter_codec.erl b/lib/diameter/src/base/diameter_codec.erl
index 15a4c5e86f..bf2fe8e7ca 100644
--- a/lib/diameter/src/base/diameter_codec.erl
+++ b/lib/diameter/src/base/diameter_codec.erl
@@ -640,8 +640,12 @@ split_data(Bin, Len) ->
%% payload if this is a request. Do this (in cases that we
%% know the type) by inducing a decode failure and letting
%% the dictionary's decode (in diameter_gen) deal with it.
- %% Here we don't know type. If the type isn't known, then
- %% the decode just strips the extra bit.
+ %%
+ %% Note that the extra bit can only occur in the trailing
+ %% AVP of a message or Grouped AVP, since a faulty AVP
+ %% Length is otherwise indistinguishable from a correct
+ %% one here, since we don't know the types of the AVPs
+ %% being extracted.
{<<0:1, Bin/binary>>, <<>>}
end.
@@ -690,8 +694,8 @@ pack_avp(#diameter_avp{code = undefined, data = B})
Len = size(<<H:5/binary, _:24, T/binary>> = <<B/binary, 0:Pad>>),
<<H/binary, Len:24, T/binary>>;
-%% ... from a dictionary compiled against old code in diameter_gen ...
%% ... when ignoring errors in Failed-AVP ...
+%% ... during a relay encode ...
pack_avp(#diameter_avp{data = <<0:1, B/binary>>} = A) ->
pack_avp(A#diameter_avp{data = B});