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authorAnders Svensson <[email protected]>2012-08-28 15:05:16 +0200
committerAnders Svensson <[email protected]>2012-08-28 15:05:16 +0200
commitbc2b1d56047bd370dd6e1e5b5377601bfcd89d23 (patch)
treed17e705244fdacdbec0bcef98f799f2c7e110d11 /lib/diameter
parentf7036408ed27781cc5d060d6966f07cb2a5e00f6 (diff)
parentde0cbe83cd96c17d75baf353e84c883b78980f98 (diff)
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Merge branch 'anders/diameter/avp_errors/OTP-10202' into maint
* anders/diameter/avp_errors/OTP-10202: Allow an answer to opt out of setting Result-Code/Failed-AVP Set Result-Code as an optional AVP in reply to request containing errors Fix Destination-Host/Realm extraction for arbitrary dictionaries Fix result code statistics for arbitrary dictionaries Count incoming answers containing AVP decode errors Fix counter typo Encode fix
Diffstat (limited to 'lib/diameter')
-rw-r--r--lib/diameter/src/base/diameter_codec.erl5
-rw-r--r--lib/diameter/src/base/diameter_service.erl149
2 files changed, 96 insertions, 58 deletions
diff --git a/lib/diameter/src/base/diameter_codec.erl b/lib/diameter/src/base/diameter_codec.erl
index fe1212b7e0..fb109fe271 100644
--- a/lib/diameter/src/base/diameter_codec.erl
+++ b/lib/diameter/src/base/diameter_codec.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2012. 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
@@ -91,7 +91,8 @@ e(_, #diameter_packet{msg = [#diameter_header{} = Hdr | As]} = Pkt) ->
Flags = make_flags(0, Hdr),
- Pkt#diameter_packet{bin = <<Vsn:8, Length:24,
+ Pkt#diameter_packet{header = Hdr,
+ bin = <<Vsn:8, Length:24,
Flags:8, Code:24,
Aid:32,
Hid:32,
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl
index 3dfdcee2b2..ced6fe605c 100644
--- a/lib/diameter/src/base/diameter_service.erl
+++ b/lib/diameter/src/base/diameter_service.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2012. 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
@@ -72,6 +72,8 @@
-define(DEFAULT_TIMEOUT, 5000). %% for outgoing requests
-define(RESTART_TC, 1000). %% if restart was this recent
+-define(RELAY, ?DIAMETER_DICT_RELAY).
+
%% Used to be able to swap this with anything else dict-like but now
%% rely on the fact that a service's #state{} record does not change
%% in storing in it ?STATE table and not always going through the
@@ -1935,6 +1937,12 @@ is_loop(Code, Vid, OH, Avps) ->
%%
%% Send a locally originating reply.
+%% Skip the setting of Result-Code and Failed-AVP's below.
+reply([Msg], Dict, TPid, Pkt)
+ when is_list(Msg);
+ is_tuple(Msg) ->
+ reply(Msg, Dict, TPid, Pkt#diameter_packet{errors = []});
+
%% No errors or a diameter_header/avp list.
reply(Msg, Dict, TPid, #diameter_packet{errors = Es,
transport_data = TD}
@@ -1942,7 +1950,7 @@ reply(Msg, Dict, TPid, #diameter_packet{errors = Es,
when [] == Es;
is_record(hd(Msg), diameter_header) ->
Pkt = diameter_codec:encode(Dict, make_answer_packet(Msg, ReqPkt)),
- incr(send, Pkt, TPid), %% count result codes in sent answers
+ incr(send, Pkt, Dict, TPid), %% count result codes in sent answers
send(TPid, Pkt#diameter_packet{transport_data = TD});
%% Or not: set Result-Code and Failed-AVP AVP's.
@@ -1983,7 +1991,10 @@ rc(RC) ->
rc(Rec, RC, Failed, Dict)
when is_integer(RC) ->
- set(Rec, [{'Result-Code', RC} | failed_avp(Rec, Failed, Dict)], Dict).
+ set(Rec,
+ lists:append([rc(Rec, {'Result-Code', RC}, Dict),
+ failed_avp(Rec, Failed, Dict)]),
+ Dict).
%% Reply as name and tuple list ...
set([_|_] = Ans, Avps, _) ->
@@ -1993,6 +2004,22 @@ set([_|_] = Ans, Avps, _) ->
set(Rec, Avps, Dict) ->
Dict:'#set-'(Avps, Rec).
+%% rc/3
+%%
+%% Turn the result code into a list if its optional and only set it if
+%% the arity is 1 or {0,1}. In other cases (which probably shouldn't
+%% exist in practise) we can't know what's appropriate.
+
+rc([MsgName | _], {'Result-Code' = K, RC} = T, Dict) ->
+ case Dict:avp_arity(MsgName, 'Result-Code') of
+ 1 -> [T];
+ {0,1} -> [{K, [RC]}];
+ _ -> []
+ end;
+
+rc(Rec, T, Dict) ->
+ rc([Dict:rec2msg(element(1, Rec))], T, Dict).
+
%% failed_avp/3
failed_avp(_, [] = No, _) ->
@@ -2200,44 +2227,39 @@ handle_answer(SvcName, _, {error, Req, Reason}) ->
handle_answer(SvcName,
AnswerErrors,
{answer, #request{dictionary = Dict} = Req, Pkt}) ->
- a(examine(diameter_codec:decode(Dict, Pkt)),
- SvcName,
- AnswerErrors,
- Req).
+ answer(examine(diameter_codec:decode(Dict, Pkt)),
+ SvcName,
+ AnswerErrors,
+ Req).
%% We don't really need to do a full decode if we're a relay and will
%% just resend with a new hop by hop identifier, but might a proxy
%% want to examine the answer?
-a(#diameter_packet{errors = []}
- = Pkt,
- SvcName,
- AE,
- #request{transport = TPid,
- caps = Caps,
- packet = P}
- = Req) ->
+answer(Pkt, SvcName, AE, #request{transport = TPid,
+ dictionary = Dict}
+ = Req) ->
try
- incr(in, Pkt, TPid)
+ incr(recv, Pkt, Dict, TPid)
of
- _ ->
- cb(Req, handle_answer, [Pkt, msg(P), SvcName, {TPid, Caps}])
+ _ -> a(Pkt, SvcName, AE, Req)
catch
exit: {invalid_error_bit, _} = E ->
- e(Pkt#diameter_packet{errors = [E]}, SvcName, AE, Req)
- end;
-
-a(#diameter_packet{} = Pkt, SvcName, AE, Req) ->
- e(Pkt, SvcName, AE, Req).
+ a(Pkt#diameter_packet{errors = [E]}, SvcName, AE, Req)
+ end.
-e(Pkt, SvcName, callback, #request{transport = TPid,
- caps = Caps,
- packet = Pkt}
- = Req) ->
- cb(Req, handle_answer, [Pkt, msg(Pkt), SvcName, {TPid, Caps}]);
-e(Pkt, SvcName, report, Req) ->
+a(#diameter_packet{errors = Es} = Pkt, SvcName, AE, #request{transport = TPid,
+ caps = Caps,
+ packet = P}
+ = Req)
+ when [] == Es;
+ callback == AE ->
+ cb(Req, handle_answer, [Pkt, msg(P), SvcName, {TPid, Caps}]);
+
+a(Pkt, SvcName, report, Req) ->
x(errors, handle_answer, [SvcName, Req, Pkt]);
-e(Pkt, SvcName, discard, Req) ->
+
+a(Pkt, SvcName, discard, Req) ->
x({errors, handle_answer, [SvcName, Req, Pkt]}).
%% Note that we don't check that the application id in the answer's
@@ -2249,17 +2271,19 @@ e(Pkt, SvcName, discard, Req) ->
%% Increment a stats counter for an incoming or outgoing message.
%% TODO: fix
-incr(_, #diameter_packet{msg = undefined}, _) ->
+incr(_, #diameter_packet{msg = undefined}, _, _) ->
ok;
-incr(Dir, Pkt, TPid)
- when is_pid(TPid) ->
+incr(recv = D, #diameter_packet{header = H, errors = [_|_]}, _, TPid) ->
+ incr(TPid, {diameter_codec:msg_id(H), D, error});
+
+incr(Dir, Pkt, Dict, TPid) ->
#diameter_packet{header = #diameter_header{is_error = E}
= Hdr,
msg = Rec}
= Pkt,
- RC = int(get_avp_value(?BASE, 'Result-Code', Rec)),
+ RC = int(get_avp_value(Dict, 'Result-Code', Rec)),
PE = is_protocol_error(RC),
%% Check that the E bit is set only for 3xxx result codes.
@@ -2267,15 +2291,21 @@ incr(Dir, Pkt, TPid)
orelse (E andalso PE)
orelse x({invalid_error_bit, RC}, answer, [Dir, Pkt]),
- Ctr = rc_counter(Rec, RC),
- is_tuple(Ctr)
- andalso incr(TPid, {diameter_codec:msg_id(Hdr), Dir, Ctr}).
+ irc(TPid, Hdr, Dir, rc_counter(Dict, Rec, RC)).
+
+irc(_, _, _, undefined) ->
+ false;
+
+irc(TPid, Hdr, Dir, Ctr) ->
+ incr(TPid, {diameter_codec:msg_id(Hdr), Dir, Ctr}).
%% incr/2
incr(TPid, Counter) ->
diameter_stats:incr(Counter, TPid, 1).
+%% error_counter/2
+
%% RFC 3588, 7.6:
%%
%% All Diameter answer messages defined in vendor-specific
@@ -2285,26 +2315,27 @@ incr(TPid, Counter) ->
%% Maintain statistics assuming one or the other, not both, which is
%% surely the intent of the RFC.
-rc_counter(_, RC)
- when is_integer(RC) ->
- {'Result-Code', RC};
-rc_counter(Rec, _) ->
- rcc(get_avp_value(?BASE, 'Experimental-Result', Rec)).
+rc_counter(Dict, Rec, undefined) ->
+ er(get_avp_value(Dict, 'Experimental-Result', Rec));
+rc_counter(_, _, RC) ->
+ {'Result-Code', RC}.
%% 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([{_,_,RC} = T])
- when is_integer(RC) ->
+er([{_,_,N} = T | _])
+ when is_integer(N) ->
T;
-rcc({_,_,RC} = T)
- when is_integer(RC) ->
+er({_,_,N} = T)
+ when is_integer(N) ->
T;
-rcc(_) ->
+er(_) ->
undefined.
-int([N])
+%% 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)
@@ -2349,8 +2380,11 @@ rt(#request{packet = #diameter_packet{msg = undefined}}, _) ->
false; %% TODO: Not what we should do.
%% ... or not.
-rt(#request{packet = #diameter_packet{msg = Msg}} = Req, S) ->
- find_transport(get_destination(Msg), Req, S).
+rt(#request{packet = #diameter_packet{msg = Msg},
+ dictionary = Dict}
+ = Req,
+ S) ->
+ find_transport(get_destination(Dict, Msg), Req, S).
%%% ---------------------------------------------------------------------------
%%% # report_status/5
@@ -2462,12 +2496,12 @@ find_transport({alias, Alias}, Msg, Opts, #state{service = Svc} = S) ->
find_transport(#diameter_app{} = App, Msg, Opts, S) ->
ft(App, Msg, Opts, S).
-ft(#diameter_app{module = Mod} = App, Msg, Opts, S) ->
+ft(#diameter_app{module = Mod, dictionary = Dict} = App, Msg, Opts, S) ->
#options{filter = Filter,
extra = Xtra}
= Opts,
pick_peer(App#diameter_app{module = Mod ++ Xtra},
- get_destination(Msg),
+ get_destination(Dict, Msg),
Filter,
S);
ft(false = No, _, _, _) ->
@@ -2503,11 +2537,11 @@ find_transport([_,_] = RH,
Filter,
S).
-%% get_destination/1
+%% get_destination/2
-get_destination(Msg) ->
- [str(get_avp_value(?BASE, 'Destination-Realm', Msg)),
- str(get_avp_value(?BASE, 'Destination-Host', Msg))].
+get_destination(Dict, Msg) ->
+ [str(get_avp_value(Dict, 'Destination-Realm', Msg)),
+ str(get_avp_value(Dict, 'Destination-Host', Msg))].
%% This is not entirely correct. The avp could have an arity 1, in
%% which case an empty list is a DiameterIdentity of length 0 rather
@@ -2531,6 +2565,9 @@ str(T) ->
%% question. The third form allows messages to be sent as is, without
%% a dictionary, which is needed in the case of relay agents, for one.
+get_avp_value(?RELAY, Name, Msg) ->
+ get_avp_value(?BASE, Name, Msg);
+
get_avp_value(Dict, Name, [#diameter_header{} | Avps]) ->
try
{Code, _, VId} = Dict:avp_header(Name),