diff options
Diffstat (limited to 'lib/diameter')
| -rw-r--r-- | lib/diameter/src/base/diameter_traffic.erl | 367 |
1 files changed, 165 insertions, 202 deletions
diff --git a/lib/diameter/src/base/diameter_traffic.erl b/lib/diameter/src/base/diameter_traffic.erl index daba440586..42164c48c0 100644 --- a/lib/diameter/src/base/diameter_traffic.erl +++ b/lib/diameter/src/base/diameter_traffic.erl @@ -275,45 +275,40 @@ recv_request(Ack, apps = Apps} = RecvData) -> Ack andalso (TPid ! {handler, self()}), - send_A(recv_R(diameter_service:find_incoming_app(PeerT, TPid, Id, Apps), - TPid, - Pkt, - Dict0, - RecvData), - TPid, - Dict0, - RecvData). - -%% recv_R/5 - -recv_R({#diameter_app{id = Id, dictionary = AppDict} = App, Caps}, - TPid, - Pkt0, - Dict0, - #recvdata{codec = Opts} - = RecvData) -> - incr(recv, Pkt0, TPid, AppDict), - Pkt = errors(Id, diameter_codec:decode(Id, AppDict, Opts, Pkt0)), - incr_error(recv, Pkt, TPid, AppDict), - {Caps, Pkt, App, recv_R(App, TPid, Dict0, Caps, RecvData, Pkt)}; -%% Note that the decode is different depending on whether or not Id is -%% ?APP_ID_RELAY. - -%% DIAMETER_APPLICATION_UNSUPPORTED 3007 -%% A request was sent for an application that is not supported. - -recv_R(#diameter_caps{} - = Caps, - _TPid, - #diameter_packet{errors = Es} - = Pkt, - _Dict0, - _RecvData) -> - {Caps, Pkt#diameter_packet{avps = collect_avps(Pkt), - errors = [3007 | Es]}}; + case diameter_service:find_incoming_app(PeerT, TPid, Id, Apps) of + {#diameter_app{id = Aid, dictionary = AppDict} = App, Caps} -> + incr(recv, Pkt, TPid, AppDict), + DecPkt = decode(Aid, AppDict, RecvData, Pkt), + incr_error(recv, DecPkt, TPid, AppDict), + send_A(recv_R(App, TPid, Dict0, Caps, RecvData, DecPkt), + TPid, + App, + Dict0, + RecvData, + DecPkt, + Caps); + #diameter_caps{} = Caps -> + %% DIAMETER_APPLICATION_UNSUPPORTED 3007 + %% A request was sent for an application that is not + %% supported. + RC = 3007, + Es = Pkt#diameter_packet.errors, + DecPkt = Pkt#diameter_packet{avps = collect_avps(Pkt), + errors = [RC | Es]}, + send_answer(answer_message(RC, Dict0, Caps, DecPkt), + TPid, + Dict0, + Dict0, + Dict0, + RecvData, + DecPkt, + [[]]); + false = No -> %% transport has gone down + No + end. -recv_R(false = No, _, _, _, _) -> %% transport has gone down - No. +decode(Id, Dict, #recvdata{codec = Opts}, Pkt) -> + errors(Id, diameter_codec:decode(Id, Dict, Opts, Pkt)). collect_avps(Pkt) -> case diameter_codec:collect_avps(Pkt) of @@ -323,6 +318,14 @@ collect_avps(Pkt) -> Avps end. +%% send_A/7 + +send_A([T | Fs], TPid, App, Dict0, RecvData, DecPkt, Caps) -> + send_A(T, TPid, App, Dict0, RecvData, DecPkt, Caps, Fs); + +send_A(discard = No, _, _, _, _, _, _) -> + No. + %% recv_R/6 %% Answer errors ourselves ... @@ -332,9 +335,9 @@ recv_R(#diameter_app{options = [_, {request_errors, E} | _]}, _Caps, _RecvData, #diameter_packet{errors = [RC|_]}) %% a detected 3xxx is hd - when E == answer, (Dict0 /= ?BASE orelse 3 == RC div 1000); + when E == answer, Dict0 /= ?BASE orelse 3 == RC div 1000; E == answer_3xxx, 3 == RC div 1000 -> - {{answer_message, rc(RC)}, [], []}; + [{answer_message, rc(RC)}, []]; %% ... or make a handle_request callback. Note that %% Pkt#diameter_packet.msg = undefined in the 3001 case. @@ -426,24 +429,24 @@ errors(_, Pkt) -> %% command code in this case. It will also then ignore Dict and use %% the base encoder. request_cb({reply, _Ans} = T, _App, EvalPktFs, EvalFs) -> - {T, EvalPktFs, EvalFs}; + [T, EvalPktFs | EvalFs]; %% An 3xxx result code, for which the E-bit is set in the header. request_cb({protocol_error, RC}, _App, EvalPktFs, EvalFs) when 3 == RC div 1000 -> - {{answer_message, RC}, EvalPktFs, EvalFs}; + [{answer_message, RC}, EvalPktFs | EvalFs]; request_cb({answer_message, RC} = T, _App, EvalPktFs, EvalFs) when 3 == RC div 1000; 5 == RC div 1000 -> - {T, EvalPktFs, EvalFs}; + [T, EvalPktFs | EvalFs]; %% RFC 3588 says we must reply 3001 to anything unrecognized or %% unsupported. 'noreply' is undocumented (and inappropriately named) %% backwards compatibility for this, protocol_error the documented %% alternative. request_cb(noreply, _App, EvalPktFs, EvalFs) -> - {{answer_message, 3001}, EvalPktFs, EvalFs}; + [{answer_message, 3001}, EvalPktFs | EvalFs]; %% Relay a request to another peer. This is equivalent to doing an %% explicit call/4 with the message in question except that (1) a loop @@ -464,7 +467,7 @@ request_cb({A, Opts}, #diameter_app{id = Id}, EvalPktFs, EvalFs) when A == relay, Id == ?APP_ID_RELAY; A == proxy, Id /= ?APP_ID_RELAY; A == resend -> - {{call, Opts}, EvalPktFs, EvalFs}; + [{call, Opts}, EvalPktFs | EvalFs]; request_cb(discard = No, _, _, _) -> No; @@ -478,80 +481,95 @@ request_cb({eval, RC, F}, App, EvalPktFs, Fs) -> request_cb(T, App, _, _) -> ?ERROR({invalid_return, T, handle_request, App}). -%% send_A/4 - -send_A({Caps, Pkt}, TPid, Dict0, RecvData) -> %% unsupported application - #diameter_packet{errors = [RC|_]} = Pkt, - send_A(answer_message(RC, Caps, Dict0, Pkt), - TPid, - {Dict0, Dict0}, - RecvData, - Pkt, - [], - []); - -send_A({Caps, Pkt, App, {T, EvalPktFs, EvalFs}}, TPid, Dict0, RecvData) -> - send_A(answer(T, Caps, Pkt, App, Dict0, RecvData), - TPid, - {App#diameter_app.dictionary, Dict0}, - RecvData, - Pkt, - EvalPktFs, - EvalFs); - -send_A(_, _, _, _) -> - ok. +%% send_A/8 + +send_A({reply, Ans}, TPid, App, Dict0, RecvData, Pkt, _Caps, Fs) -> + AppDict = App#diameter_app.dictionary, + MsgDict = msg_dict(AppDict, Dict0, Ans), + send_answer(Ans, + TPid, + MsgDict, + AppDict, + Dict0, + RecvData, + Pkt, + Fs); + +send_A({call, Opts}, TPid, App, Dict0, RecvData, Pkt, Caps, Fs) -> + AppDict = App#diameter_app.dictionary, + case resend(Opts, Caps, Pkt, App, Dict0, RecvData) of + #diameter_packet{bin = Bin} = Ans -> %% answer: reset hop by hop id + #diameter_packet{header = #diameter_header{hop_by_hop_id = Id}, + transport_data = TD} + = Pkt, + Reset = diameter_codec:hop_by_hop_id(Id, Bin), + MsgDict = msg_dict(AppDict, Dict0, Ans), + send_answer(Ans#diameter_packet{bin = Reset, + transport_data = TD}, + TPid, + MsgDict, + AppDict, + Dict0, + Fs); + RC -> + send_answer(answer_message(RC, Dict0, Caps, Pkt), + TPid, + Dict0, + AppDict, + Dict0, + RecvData, + Pkt, + Fs) + end; -%% send_A/7 +%% RFC 3588 only allows 3xxx errors in an answer-message. RFC 6733 +%% added the possibility of setting 5xxx. -send_A(T, - TPid, - {AppDict, Dict0} - = DictT0, - RecvData, - ReqPkt, - EvalPktFs, - EvalFs) -> - {MsgDict, Pkt} = reply(T, TPid, DictT0, RecvData, EvalPktFs, ReqPkt), - incr(send, Pkt, TPid, AppDict), - incr_rc(send, Pkt, TPid, {MsgDict, AppDict, Dict0}), %% count outgoing - send(TPid, Pkt, _Route = self()), - lists:foreach(fun diameter_lib:eval/1, EvalFs). +send_A({answer_message, RC} = T, TPid, App, Dict0, RecvData, Pkt, Caps, Fs) -> + Dict0 /= ?BASE orelse 3 == RC div 1000 + orelse ?ERROR({invalid_return, T, handle_request, App}), + send_answer(answer_message(RC, Dict0, Caps, Pkt), + TPid, + Dict0, + App#diameter_app.dictionary, + Dict0, + RecvData, + Pkt, + Fs). -%% answer/6 +%% send_answer/8 -answer({reply, Ans}, _Caps, _Pkt, App, Dict0, _RecvData) -> - {msg_dict(App#diameter_app.dictionary, Dict0, Ans), Ans}; +%% Skip the setting of Result-Code and Failed-AVP's below. This is +%% undocumented and shouldn't be relied on. +send_answer([Ans], TPid, MsgDict, AppDict, Dict0, RecvData, Pkt, Fs) + when [] == Pkt#diameter_packet.errors -> + send_answer(Ans, TPid, MsgDict, AppDict, Dict0, RecvData, Pkt, Fs); +send_answer([Ans], TPid, MsgDict, AppDict, Dict0, RecvData, Pkt0, Fs) -> + Pkt = Pkt0#diameter_packet{errors = []}, + send_answer(Ans, TPid, MsgDict, AppDict, Dict0, RecvData, Pkt, Fs); + +send_answer(Ans, TPid, MsgDict, AppDict, Dict0, RecvData, DecPkt, Fs) -> + Pkt = encode({MsgDict, AppDict}, + TPid, + RecvData#recvdata.codec, + make_answer_packet(Ans, DecPkt, MsgDict, Dict0)), + send_answer(Pkt, TPid, MsgDict, AppDict, Dict0, Fs). -answer({call, Opts}, Caps, Pkt, App, Dict0, RecvData) -> - #diameter_caps{origin_host = {OH,_}} - = Caps, - #diameter_packet{avps = Avps} - = Pkt, - {Code, _Flags, Vid} = Dict0:avp_header('Route-Record'), - resend(is_loop(Code, Vid, OH, Dict0, Avps), - Opts, - Caps, - Pkt, - App, - Dict0, - RecvData); +%% send_answer/6 -%% RFC 3588 only allows 3xxx errors in an answer-message. RFC 6733 -%% added the possibility of setting 5xxx. -answer({answer_message, RC} = T, Caps, Pkt, App, Dict0, _RecvData) -> - Dict0 /= ?BASE orelse 3 == RC div 1000 - orelse ?ERROR({invalid_return, T, handle_request, App}), - answer_message(RC, Caps, Dict0, Pkt). +send_answer(Pkt, TPid, MsgDict, AppDict, Dict0, [EvalPktFs | EvalFs]) -> + eval_packet(Pkt, EvalPktFs), + incr(send, Pkt, TPid, AppDict), + incr_rc(send, Pkt, TPid, {MsgDict, AppDict, Dict0}), %% count outgoing + send(TPid, Pkt, _Route = self()), + lists:foreach(fun diameter_lib:eval/1, EvalFs). %% msg_dict/3 %% %% Return the dictionary defining the message grammar in question: the %% application dictionary or the common dictionary. -msg_dict(AppDict, Dict0, [Msg]) - when is_list(Msg); - is_tuple(Msg) -> +msg_dict(AppDict, Dict0, [Msg]) -> msg_dict(AppDict, Dict0, Msg); msg_dict(AppDict, Dict0, Msg) -> @@ -582,14 +600,10 @@ is_answer_message(Rec, Dict) -> error:_ -> false end. -%% answer_message/4 +%% resend/6 -answer_message(RC, - #diameter_caps{origin_host = {OH,_}, - origin_realm = {OR,_}}, - Dict0, - Pkt) -> - {Dict0, answer_message(OH, OR, RC, Dict0, Pkt)}. +resend(Opts, Caps, Pkt, App, Dict0, RecvData) -> + resend(is_loop(Dict0, Caps, Pkt), Opts, Caps, Pkt, App, Dict0, RecvData). %% resend/7 @@ -599,8 +613,8 @@ answer_message(RC, %% if one is available, but the peer reporting the error has %% identified a configuration problem. -resend(true, _Opts, Caps, Pkt, _App, Dict0, _RecvData) -> - answer_message(3005, Caps, Dict0, Pkt); +resend(true, _Opts, _Caps, _Pkt, _App, _Dict0, _RecvData) -> + 3005; %% 6.1.8. Relaying and Proxying Requests %% @@ -610,11 +624,9 @@ resend(true, _Opts, Caps, Pkt, _App, Dict0, _RecvData) -> resend(false, Opts, - #diameter_caps{origin_host = {_,OH}} - = Caps, + #diameter_caps{origin_host = {_,OH}}, #diameter_packet{header = Hdr0, - avps = Avps} - = Pkt, + avps = Avps}, App, Dict0, #recvdata{service_name = SvcName, @@ -623,7 +635,12 @@ resend(false, Seq = diameter_session:sequence(Mask), Hdr = Hdr0#diameter_header{hop_by_hop_id = Seq}, Msg = [Hdr, Route | Avps], %% reordered at encode - resend(send_request(SvcName, App, Msg, Opts), Caps, Dict0, Pkt). + case send_request(SvcName, App, Msg, Opts) of + #diameter_packet{} = Ans -> + Ans; + _ -> + 3002 %% DIAMETER_UNABLE_TO_DELIVER. + end. %% The incoming request is relayed with the addition of a %% Route-Record. Note the requirement on the return from call/4 below, %% which places a requirement on the value returned by the @@ -640,85 +657,33 @@ resend(false, %% RFC 6.3 says that a relay agent does not modify Origin-Host but %% says nothing about a proxy. Assume it should behave the same way. -%% resend/4 -%% -%% Relay a reply to a relayed request. - -%% Answer from the peer: reset the hop by hop identifier. -resend(#diameter_packet{bin = B} - = Pkt, - _Caps, - _Dict0, - #diameter_packet{header = #diameter_header{hop_by_hop_id = Id}, - transport_data = TD}) -> - Pkt#diameter_packet{bin = diameter_codec:hop_by_hop_id(Id, B), - transport_data = TD}; -%% TODO: counters +%% is_loop/3 -%% Or not: DIAMETER_UNABLE_TO_DELIVER. -resend(_, Caps, Dict0, Pkt) -> - answer_message(3002, Caps, Dict0, Pkt). +is_loop(Dict0, + #diameter_caps{origin_host = {OH,_}}, + #diameter_packet{avps = Avps}) -> + {Code, _Flags, Vid} = Dict0:avp_header('Route-Record'), + is_loop(Code, Vid, OH, Avps). -%% is_loop/5 +%% is_loop/4 %% %% Is there a Route-Record AVP with our Origin-Host? -is_loop(Code, - Vid, - Bin, - _Dict0, - [#diameter_avp{code = Code, vendor_id = Vid, data = Bin} | _]) -> +is_loop(Code, Vid, Bin, [#diameter_avp{code = Code, + vendor_id = Vid, + data = Bin} + | _]) -> true; -is_loop(_, _, _, _, []) -> +is_loop(_, _, _, []) -> false; -is_loop(Code, Vid, OH, Dict0, [_ | Avps]) +is_loop(Code, Vid, OH, [_ | Avps]) when is_binary(OH) -> - is_loop(Code, Vid, OH, Dict0, Avps); - -is_loop(Code, Vid, OH, Dict0, Avps) -> - is_loop(Code, Vid, list_to_binary(OH), Dict0, Avps). + is_loop(Code, Vid, OH, Avps); -%% reply/6 - -%% Local answer ... -reply({MsgDict, Ans}, TPid, {AppDict, Dict0}, RecvData, Fs, ReqPkt) -> - local(Ans, TPid, {MsgDict, AppDict, Dict0}, RecvData, Fs, ReqPkt); - -%% ... or relayed. -reply(#diameter_packet{} = Pkt, _TPid, {AppDict, Dict0}, _, Fs, _ReqPkt) -> - eval_packet(Pkt, Fs), - {msg_dict(AppDict, Dict0, Pkt), Pkt}. - -%% local/6 -%% -%% Send a locally originating reply. - -%% Skip the setting of Result-Code and Failed-AVP's below. This is -%% undocumented and shouldn't be relied on. -local([Msg], TPid, DictT, RecvData, Fs, ReqPkt) - when is_list(Msg); - is_tuple(Msg) -> - local(Msg, - TPid, - DictT, - RecvData, - Fs, - ReqPkt#diameter_packet{errors = []}); - -local(Msg, - TPid, - {MsgDict, AppDict, Dict0}, - #recvdata{codec = Opts}, - Fs, - ReqPkt) -> - Pkt = encode({MsgDict, AppDict}, - TPid, - make_answer_packet(Msg, ReqPkt, MsgDict, Dict0), - Opts, - Fs), - {MsgDict, Pkt}. +is_loop(Code, Vid, OH, Avps) -> + is_loop(Code, Vid, list_to_binary(OH), Avps). %% select_error/3 %% @@ -999,10 +964,14 @@ failed(Rec, FailedAvp, Dict) -> %% Error-Message AVP is not intended to be useful in real-time, and %% SHOULD NOT be expected to be parsed by network entities. -%% answer_message/5 +%% answer_message/4 -answer_message(OH, OR, RC, Dict0, #diameter_packet{avps = Avps, - errors = Es}) -> +answer_message(RC, + Dict0, + #diameter_caps{origin_host = {OH,_}, + origin_realm = {OR,_}}, + #diameter_packet{avps = Avps, + errors = Es}) -> {Code, _, Vid} = Dict0:avp_header('Session-Id'), ['answer-message', {'Origin-Host', OH}, {'Origin-Realm', OR}, @@ -1367,9 +1336,9 @@ send_request({{TPid, _Caps} = TC, App} ReqPkt = make_request_packet(Msg, Pkt), EncPkt = encode(App#diameter_app.dictionary, TPid, - ReqPkt, SvcOpts, - Fs), + ReqPkt), + eval_packet(EncPkt, Fs), T = send_R(ReqPkt, EncPkt, Transport, CallOpts, Caller, SvcName), Ans = recv_answer(SvcName, App, CallOpts, T), handle_answer(SvcName, SvcOpts, App, Ans); @@ -1648,7 +1617,8 @@ resend_request({{{TPid, _Caps} = TC, App}, SvcOpts}, of [ReqPkt | Fs] -> AppDict = App#diameter_app.dictionary, - EncPkt = encode(AppDict, TPid, ReqPkt, SvcOpts, Fs), + EncPkt = encode(AppDict, TPid, SvcOpts, ReqPkt), + eval_packet(EncPkt, Fs), Req = Req0#request{peer = TC, packet = ReqPkt}, ?LOG(retransmission, EncPkt#diameter_packet.header), @@ -1698,13 +1668,6 @@ msg(#diameter_packet{msg = undefined, bin = Bin}) -> msg(#diameter_packet{msg = Msg}) -> Msg. -%% encode/5 - -encode(Dict, TPid, Pkt, Opts, Fs) -> - P = encode(Dict, TPid, Opts, Pkt), - eval_packet(P, Fs), - P. - %% encode/4 %% Note that prepare_request can return a diameter_packet containing a |