From f8e1d4c5fe8bc67cac092e5cb45457d223172f2a Mon Sep 17 00:00:00 2001 From: Anders Svensson Date: Wed, 24 Jun 2015 13:45:19 +0200 Subject: Fix relay encode of decoded diameter_avp lists MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit c74b593a fixed the problem that a decoded deep diameter_avp list couldn't be encoded, but did so in the wrong way: there's no need to reencode component AVPs since the Grouped AVP itself already contains the encoded binary. The blunder caused diameter_codec:pack_avp/1 to fail if the first element of the AVP list to be encoded was itself a list. Thanks to Andrzej Trawiński for reporting the problem. --- lib/diameter/src/base/diameter_codec.erl | 21 +++++++++----- lib/diameter/test/diameter_relay_SUITE.erl | 44 +++++++++++++++++++++++++++--- 2 files changed, 54 insertions(+), 11 deletions(-) diff --git a/lib/diameter/src/base/diameter_codec.erl b/lib/diameter/src/base/diameter_codec.erl index bf2fe8e7ca..2ad971a422 100644 --- a/lib/diameter/src/base/diameter_codec.erl +++ b/lib/diameter/src/base/diameter_codec.erl @@ -655,16 +655,23 @@ split_data(Bin, Len) -> %% The normal case here is data as an #diameter_avp{} list or an %% iolist, which are the cases that generated codec modules use. The -%% other case is as a convenience in the relay case in which the +%% other cases are a convenience in the relay case in which the %% dictionary doesn't know about specific AVP's. -%% Grouped AVP whose components need packing ... -pack_avp([#diameter_avp{} = A | Avps]) -> - pack_avp(A#diameter_avp{data = Avps}); -pack_avp(#diameter_avp{data = [#diameter_avp{} | _] = Avps} = A) -> - pack_avp(A#diameter_avp{data = encode_avps(Avps)}); +%% Decoded Grouped AVP with decoded components: ignore components +%% since they're already encoded in the Grouped AVP. +pack_avp([#diameter_avp{} = Grouped | _Components]) -> + pack_avp(Grouped); -%% ... data as a type/value tuple ... +%% Grouped AVP whose components need packing. It's intentional that +%% this isn't equivalent to [Grouped | Components]: here the +%% components need to be encoded before wrapping with the Grouped AVP, +%% and the list is flat, nesting being accomplished in the data +%% fields. +pack_avp(#diameter_avp{data = [#diameter_avp{} | _] = Components} = Grouped) -> + pack_avp(Grouped#diameter_avp{data = encode_avps(Components)}); + +%% Data as a type/value tuple ... pack_avp(#diameter_avp{data = {Type, Value}} = A) when is_atom(Type) -> pack_avp(A#diameter_avp{data = diameter_types:Type(encode, Value)}); diff --git a/lib/diameter/test/diameter_relay_SUITE.erl b/lib/diameter/test/diameter_relay_SUITE.erl index 7142239bbb..5f7837e879 100644 --- a/lib/diameter/test/diameter_relay_SUITE.erl +++ b/lib/diameter/test/diameter_relay_SUITE.erl @@ -333,13 +333,39 @@ realm(Host) -> call(Server) -> Realm = realm(Server), + %% Include some arbitrary AVPs to exercise encode/decode, that + %% are received back in the STA. + Avps = [#diameter_avp{code = 111, + data = [#diameter_avp{code = 222, + data = <<222:24>>}, + #diameter_avp{code = 333, + data = <<333:16>>}]}, + #diameter_avp{code = 444, + data = <<444:24>>}, + #diameter_avp{code = 555, + data = [#diameter_avp{code = 666, + data = [#diameter_avp + {code = 777, + data = <<7>>}]}, + #diameter_avp{code = 888, + data = <<8>>}, + #diameter_avp{code = 999, + data = <<9>>}]}], + Req = ['STR', {'Destination-Realm', Realm}, {'Destination-Host', [Server]}, {'Termination-Cause', ?LOGOUT}, - {'Auth-Application-Id', ?APP_ID}], + {'Auth-Application-Id', ?APP_ID}, + {'AVP', Avps}], + #diameter_base_STA{'Result-Code' = ?SUCCESS, 'Origin-Host' = Server, - 'Origin-Realm' = Realm} + 'Origin-Realm' = Realm, + %% Unknown AVPs can't be decoded as Grouped since + %% types aren't known. + 'AVP' = [#diameter_avp{code = 111}, + #diameter_avp{code = 444}, + #diameter_avp{code = 555}]} = call(Req, [{filter, realm}]). call(Req, Opts) -> @@ -433,9 +459,18 @@ request(_Pkt, #diameter_caps{origin_host = {OH, _}}) request(#diameter_packet{msg = #diameter_base_STR{'Session-Id' = SId, 'Origin-Host' = Host, 'Origin-Realm' = Realm, - 'Route-Record' = Route}}, + 'Route-Record' = Route, + 'AVP' = Avps}}, #diameter_caps{origin_host = {OH, _}, origin_realm = {OR, _}}) -> + + %% Payloads of unknown AVPs aren't decoded, so we don't know that + %% some types here are Grouped. + [#diameter_avp{code = 111, vendor_id = undefined}, + #diameter_avp{code = 444, vendor_id = undefined, data = <<444:24>>}, + #diameter_avp{code = 555, vendor_id = undefined}] + = Avps, + %% The request should have the Origin-Host/Realm of the original %% sender. R = realm(?CLIENT), @@ -446,4 +481,5 @@ request(#diameter_packet{msg = #diameter_base_STR{'Session-Id' = SId, {reply, #diameter_base_STA{'Result-Code' = ?SUCCESS, 'Session-Id' = SId, 'Origin-Host' = OH, - 'Origin-Realm' = OR}}. + 'Origin-Realm' = OR, + 'AVP' = Avps}}. -- cgit v1.2.3