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-rw-r--r--lib/diameter/src/base/diameter_codec.erl10
-rw-r--r--lib/diameter/src/base/diameter_traffic.erl176
2 files changed, 103 insertions, 83 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});
diff --git a/lib/diameter/src/base/diameter_traffic.erl b/lib/diameter/src/base/diameter_traffic.erl
index 538ebeeeba..ffd2c0afa2 100644
--- a/lib/diameter/src/base/diameter_traffic.erl
+++ b/lib/diameter/src/base/diameter_traffic.erl
@@ -980,8 +980,8 @@ answer_message(OH, OR, RC, Dict0, #diameter_packet{avps = Avps,
session_id(Code, Vid, Dict0, Avps)
when is_list(Avps) ->
try
- {value, #diameter_avp{data = D}} = find_avp(Code, Vid, Avps),
- [{'Session-Id', [Dict0:avp(decode, D, 'Session-Id')]}]
+ #diameter_avp{data = Bin} = find_avp(Code, Vid, Avps),
+ [{'Session-Id', [Dict0:avp(decode, Bin, 'Session-Id')]}]
catch
error: _ ->
[]
@@ -998,26 +998,17 @@ failed_avp(_, [] = No) ->
%% find_avp/3
-find_avp(Code, Vid, Avps)
- when is_integer(Code), (undefined == Vid orelse is_integer(Vid)) ->
- find(fun(A) -> is_avp(Code, Vid, A) end, Avps).
+%% Grouped ...
+find_avp(Code, VId, [[#diameter_avp{code = Code, vendor_id = VId} | _] = As
+ | _]) ->
+ As;
-%% The final argument here could be a list of AVP's, depending on the case,
-%% but we're only searching at the top level.
-is_avp(Code, Vid, #diameter_avp{code = Code, vendor_id = Vid}) ->
- true;
-is_avp(_, _, _) ->
- false.
+%% ... or not.
+find_avp(Code, VId, [#diameter_avp{code = Code, vendor_id = VId} = A | _]) ->
+ A;
-find(_, []) ->
- false;
-find(Pred, [H|T]) ->
- case Pred(H) of
- true ->
- {value, H};
- false ->
- find(Pred, T)
- end.
+find_avp(Code, VId, [_ | Avps]) ->
+ find_avp(Code, VId, Avps).
%% 7. Error Handling
%%
@@ -1086,7 +1077,6 @@ incr_result(_, #diameter_packet{msg = undefined = No}, _, _) ->
incr_result(Dir, Pkt, TPid, {Dict, AppDict, Dict0}) ->
#diameter_packet{header = #diameter_header{is_error = E}
= Hdr,
- msg = Msg,
errors = Es}
= Pkt,
@@ -1096,13 +1086,13 @@ incr_result(Dir, Pkt, TPid, {Dict, AppDict, Dict0}) ->
recv /= Dir orelse [] == Es orelse incr_error(Dir, Id, TPid, AppDict),
%% Exit on a missing result code.
- T = rc_counter(Dict, Msg),
+ T = rc_counter(Dict, Dir, Pkt),
T == false andalso ?LOGX(no_result_code, {Dict, Dir, Hdr}),
- {Ctr, RC} = T,
+ {Ctr, RC, Avp} = T,
%% Or on an inappropriate value.
is_result(RC, E, Dict0)
- orelse ?LOGX(invalid_error_bit, {Dict, Dir, Hdr, RC}),
+ orelse ?LOGX(invalid_error_bit, {Dict, Dir, Hdr, Avp}),
incr(TPid, {Id, Dir, Ctr}),
Ctr.
@@ -1116,19 +1106,15 @@ msg_id(#diameter_packet{header = H}, Dict) ->
%% there are 2^32 (application ids) * 2^24 (command codes) = 2^56
%% pairs for an attacker to choose from.
msg_id(Hdr, Dict) ->
- {_ApplId, Code, R} = Id = diameter_codec:msg_id(Hdr),
- case Dict:msg_name(Code, 0 == R) of
- '' ->
- unknown(Dict:id(), R);
- _ ->
- Id
+ {Aid, Code, R} = Id = diameter_codec:msg_id(Hdr),
+ if Aid == ?APP_ID_RELAY ->
+ {relay, R};
+ true ->
+ choose(Aid /= Dict:id() orelse '' == Dict:msg_name(Code, 0 == R),
+ unknown,
+ Id)
end.
-unknown(?APP_ID_RELAY, R) ->
- {relay, R};
-unknown(_, _) ->
- unknown.
-
%% No E-bit: can't be 3xxx.
is_result(RC, false, _Dict0) ->
RC < 3000 orelse 4000 =< RC;
@@ -1148,7 +1134,7 @@ is_result(RC, true, _) ->
incr(TPid, Counter) ->
diameter_stats:incr(Counter, TPid, 1).
-%% rc_counter/2
+%% rc_counter/3
%% RFC 3588, 7.6:
%%
@@ -1156,39 +1142,45 @@ incr(TPid, Counter) ->
%% applications MUST include either one Result-Code AVP or one
%% Experimental-Result AVP.
-rc_counter(Dict, Msg) ->
- rcc(Dict, Msg, int(get_avp_value(Dict, 'Result-Code', Msg))).
+rc_counter(Dict, recv, #diameter_packet{header = H, avps = As}) ->
+ rc_counter(Dict, [H|As]);
-rcc(Dict, Msg, undefined) ->
- rcc(get_avp_value(Dict, 'Experimental-Result', Msg));
+rc_counter(Dict, _, #diameter_packet{msg = Msg}) ->
+ rc_counter(Dict, Msg).
-rcc(_, _, N)
+rc_counter(Dict, Msg) ->
+ rcc(get_result(Dict, Msg)).
+
+rcc(#diameter_avp{name = 'Result-Code' = Name, value = N} = A)
when is_integer(N) ->
- {{'Result-Code', N}, N}.
+ {{Name, N}, N, A};
-%% Outgoing answers may be in any of the forms messages can be sent
-%% in. Incoming messages will be records. We're assuming here that the
-%% arity of the result code AVP's is 0 or 1.
+rcc(#diameter_avp{name = 'Result-Code' = Name, value = [N|_]} = A)
+ when is_integer(N) ->
+ {{Name, N}, N, A};
-rcc([{_,_,N} = T | _])
+rcc(#diameter_avp{name = 'Experimental-Result', value = {_,_,N} = T} = A)
when is_integer(N) ->
- {T,N};
-rcc({_,_,N} = T)
+ {T, N, A};
+
+rcc(#diameter_avp{name = 'Experimental-Result', value = [{_,_,N} = T|_]} = A)
when is_integer(N) ->
- {T,N};
+ {T, N, A};
+
rcc(_) ->
false.
-%% Extract the first good looking integer. There's no guarantee
-%% that what we're looking for has arity 1.
-int([N|_])
- when is_integer(N) ->
- N;
-int(N)
- when is_integer(N) ->
- N;
-int(_) ->
- undefined.
+%% get_result/2
+
+get_result(Dict, Msg) ->
+ try
+ [throw(A) || N <- ['Result-Code', 'Experimental-Result'],
+ #diameter_avp{} = A <- [get_avp(Dict, N, Msg)]]
+ of
+ [] -> false
+ catch
+ #diameter_avp{} = A -> A
+ end.
x(T) ->
exit(T).
@@ -1528,10 +1520,10 @@ handle_A(Pkt, SvcName, Dict, Dict0, App, #request{transport = TPid} = Req) ->
%% a missing AVP. If both are optional in the dictionary
%% then this isn't a decode error: just continue on.
answer(Pkt, SvcName, App, Req);
- exit: {invalid_error_bit, {_, _, _, RC}} ->
+ exit: {invalid_error_bit, {_, _, _, Avp}} ->
#diameter_packet{errors = Es}
= Pkt,
- E = {5004, #diameter_avp{name = 'Result-Code', value = RC}},
+ E = {5004, Avp},
answer(Pkt#diameter_packet{errors = [E|Es]}, SvcName, App, Req)
end.
@@ -1868,7 +1860,7 @@ str([]) ->
str(T) ->
T.
-%% get_avp_value/3
+%% get_avp/3
%%
%% Find an AVP in a message of one of three forms:
%%
@@ -1885,47 +1877,71 @@ str(T) ->
%% look for are in the common dictionary. This is required since the
%% relay dictionary doesn't inherit the common dictionary (which maybe
%% it should).
-get_avp_value(?RELAY, Name, Msg) ->
- get_avp_value(?BASE, Name, Msg);
+get_avp(?RELAY, Name, Msg) ->
+ get_avp(?BASE, Name, Msg);
-%% Message sent as a header/avps list, probably a relay case but not
-%% necessarily.
-get_avp_value(Dict, Name, [#diameter_header{} | Avps]) ->
+%% Message as a header/avps list.
+get_avp(Dict, Name, [#diameter_header{} | Avps]) ->
try
{Code, _, VId} = Dict:avp_header(Name),
- [A|_] = lists:dropwhile(fun(#diameter_avp{code = C, vendor_id = V}) ->
- C /= Code orelse V /= VId
- end,
- Avps),
- avp_decode(Dict, Name, A)
+ find_avp(Code, VId, Avps)
+ of
+ A ->
+ avp_decode(Dict, Name, ungroup(A))
catch
error: _ ->
undefined
end;
%% Outgoing message as a name/values list.
-get_avp_value(_, Name, [_MsgName | Avps]) ->
+get_avp(_, Name, [_MsgName | Avps]) ->
case lists:keyfind(Name, 1, Avps) of
{_, V} ->
- V;
+ #diameter_avp{name = Name, value = V};
_ ->
undefined
end;
%% Message is typically a record but not necessarily.
-get_avp_value(Dict, Name, Rec) ->
+get_avp(Dict, Name, Rec) ->
try
- Dict:'#get-'(Name, Rec)
+ #diameter_avp{name = Name, value = Dict:'#get-'(Name, Rec)}
catch
error:_ ->
undefined
end.
+%% get_avp_value/3
+
+get_avp_value(Dict, Name, Msg) ->
+ case get_avp(Dict, Name, Msg) of
+ #diameter_avp{value = V} ->
+ V;
+ undefined = No ->
+ No
+ end.
+
+%% ungroup/1
+
+ungroup([Avp|_]) ->
+ Avp;
+ungroup(Avp) ->
+ Avp.
+
+%% avp_decode/3
+
avp_decode(Dict, Name, #diameter_avp{value = undefined,
- data = Bin}) ->
- Dict:avp(decode, Bin, Name);
-avp_decode(_, _, #diameter_avp{value = V}) ->
- V.
+ data = Bin}
+ = Avp) ->
+ try Dict:avp(decode, Bin, Name) of
+ V ->
+ Avp#diameter_avp{value = V}
+ catch
+ error:_ ->
+ Avp
+ end;
+avp_decode(_, _, #diameter_avp{} = Avp) ->
+ Avp.
cb(#diameter_app{module = [_|_] = M}, F, A) ->
eval(M, F, A);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 19:31:02 +0000