diff options
Diffstat (limited to 'lib/diameter/include')
| -rw-r--r-- | lib/diameter/include/diameter_gen.hrl | 61 |
1 files changed, 49 insertions, 12 deletions
diff --git a/lib/diameter/include/diameter_gen.hrl b/lib/diameter/include/diameter_gen.hrl index 81e093b91a..fb321054bd 100644 --- a/lib/diameter/include/diameter_gen.hrl +++ b/lib/diameter/include/diameter_gen.hrl @@ -333,10 +333,8 @@ d(Name, Avp, Acc) -> {H, A} = ungroup(V, Avp), {[H | Avps], pack_avp(Name, A, T)} catch - throw: {?TAG, {grouped, RC, ComponentAvps}} -> - {Avps, {Rec, Errors}} = Acc, - A = trim(Avp), - {[[A | trim(ComponentAvps)] | Avps], {Rec, [{RC, A} | Errors]}}; + throw: {?TAG, {grouped, Error, ComponentAvps}} -> + g(is_failed(), Error, Name, trim(Avp), Acc, ComponentAvps); error: Reason -> d(is_failed(), Reason, Name, trim(Avp), Acc) after @@ -376,6 +374,27 @@ dict(true) -> dict(_) -> ?MODULE. +%% g/5 + +%% Ignore decode errors within Failed-AVP (best-effort) ... +g(true, [_Error | Rec], Name, Avp, Acc, _ComponentAvps) -> + decode_AVP(Name, Avp#diameter_avp{value = Rec}, Acc); +g(true, _Error, Name, Avp, Acc, _ComponentAvps) -> + decode_AVP(Name, Avp, Acc); + +%% ... or not. +g(false, [Error | _Rec], _Name, Avp, Acc, ComponentAvps) -> + g(Error, Avp, Acc, ComponentAvps); +g(false, Error, _Name, Avp, Acc, ComponentAvps) -> + g(Error, Avp, Acc, ComponentAvps). + +%% g/4 + +g({RC, ErrorData}, Avp, Acc, ComponentAvps) -> + {Avps, {Rec, Errors}} = Acc, + E = Avp#diameter_avp{data = [ErrorData]}, + {[[Avp | trim(ComponentAvps)] | Avps], {Rec, [{RC, E} | Errors]}}. + %% d/5 %% Ignore a decode error within Failed-AVP ... @@ -459,8 +478,8 @@ decode_AVP(Name, Avp, {Avps, Acc}) -> %% diameter_types will raise an error of this form to communicate %% DIAMETER_INVALID_AVP_LENGTH (5014). A module specified to a -%% @custom_types tag in a spec file can also raise an error of this -%% form. +%% @custom_types tag in a dictionary file can also raise an error of +%% this form. rc({'DIAMETER', 5014 = RC, _}, #diameter_avp{name = AvpName} = Avp) -> {RC, Avp#diameter_avp{data = empty_value(AvpName)}}; @@ -617,9 +636,12 @@ value(_, Avp) -> -> binary() | no_return(). -%% Length error induced by diameter_codec:collect_avps/1. +%% Length error induced by diameter_codec:collect_avps/1: the AVP +%% length in the header was too short (insufficient for the extracted +%% header) or too long (past the end of the message). An empty payload +%% is sufficient according to the RFC text for 5014. grouped_avp(decode, _Name, <<0:1, _/binary>>) -> - throw({?TAG, {grouped, 5014, []}}); + throw({?TAG, {grouped, {5014, []}, []}}); grouped_avp(decode, Name, Data) -> grouped_decode(Name, diameter_codec:collect_avps(Data)); @@ -633,13 +655,28 @@ grouped_avp(encode, Name, Data) -> %% decoded value, also returning the list of component diameter_avp %% records. +%% Length error in trailing component AVP. grouped_decode(_Name, {Error, Acc}) -> - {RC, Avp} = Error, - throw({?TAG, {grouped, RC, [Avp | Acc]}}); - + {5014, Avp} = Error, + throw({?TAG, {grouped, Error, [Avp | Acc]}}); + +%% 7.5. Failed-AVP AVP + +%% In the case where the offending AVP is embedded within a Grouped AVP, +%% the Failed-AVP MAY contain the grouped AVP, which in turn contains +%% the single offending AVP. The same method MAY be employed if the +%% grouped AVP itself is embedded in yet another grouped AVP and so on. +%% In this case, the Failed-AVP MAY contain the grouped AVP hierarchy up +%% to the single offending AVP. This enables the recipient to detect +%% the location of the offending AVP when embedded in a group. + +%% An error in decoding a component AVP throws the first fauly +%% component, which the catch in d/3 wraps in the Grouped AVP in +%% question. A partially decoded record is only used when ignoring +%% errors in Failed-AVP. grouped_decode(Name, ComponentAvps) -> {Rec, Avps, Es} = decode_avps(Name, ComponentAvps), - [] == Es orelse throw({?TAG, {grouped, 5004, Avps}}), %% decode failure + [] == Es orelse throw({?TAG, {grouped, [{_,_} = hd(Es) | Rec], Avps}}), {Rec, Avps}. %% --------------------------------------------------------------------------- |