diff options
Diffstat (limited to 'lib/diameter')
| -rw-r--r-- | lib/diameter/src/base/diameter_service.erl | 194 |
1 files changed, 122 insertions, 72 deletions
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl index 725cccda1e..01c50a8e30 100644 --- a/lib/diameter/src/base/diameter_service.erl +++ b/lib/diameter/src/base/diameter_service.erl @@ -1301,28 +1301,34 @@ cm([_,_|_], _, _, _) -> %% The mod field of the #diameter_app{} here includes any extra %% arguments passed to diameter:call/2. -send_request({TPid, Caps, App}, Msg, Opts, Caller, SvcName) -> +send_request({TPid, Caps, App} = T, Msg, Opts, Caller, SvcName) -> #diameter_app{module = ModX} = App, Pkt = make_request_packet(Msg), - case cb(ModX, prepare_request, [Pkt, SvcName, {TPid, Caps}]) of - {send, P} -> - send_request(make_request_packet(P, Pkt), - TPid, - Caps, - App, - Opts, - Caller, - SvcName); - {discard, Reason} -> - {error, Reason}; - discard -> - {error, discarded}; - T -> - ?ERROR({invalid_return, prepare_request, App, T}) - end. + send_req(cb(ModX, prepare_request, [Pkt, SvcName, {TPid, Caps}]), + Pkt, + T, + Opts, + Caller, + SvcName, + []). + +send_req({send, P}, Pkt, T, Opts, Caller, SvcName, Fs) -> + send_request(make_request_packet(P, Pkt), T, Opts, Caller, SvcName, Fs); + +send_req({discard, Reason} , _, _, _, _, _, _) -> + {error, Reason}; + +send_req(discard, _, _, _, _, _, _) -> + {error, discarded}; + +send_req({eval_packet, RC, F}, Pkt, T, Opts, Caller, SvcName, Fs) -> + send_req(RC, Pkt, T, Opts, Caller, SvcName, [F|Fs]); + +send_req(E, _, {_, _, App}, _, _, _, _) -> + ?ERROR({invalid_return, prepare_request, App, E}). %% make_request_packet/1 %% @@ -1400,16 +1406,16 @@ fold_record(undefined, R) -> fold_record(Rec, R) -> diameter_lib:fold_tuple(2, Rec, R). -%% send_request/7 +%% send_request/6 -send_request(Pkt, TPid, Caps, App, Opts, Caller, SvcName) -> +send_request(Pkt, {TPid, Caps, App}, Opts, Caller, SvcName, Fs) -> #diameter_app{alias = Alias, dictionary = Dict, module = ModX, options = [{answer_errors, AE} | _]} = App, - EPkt = encode(Dict, Pkt), + EPkt = encode(Dict, Pkt, Fs), #options{filter = Filter, timeout = Timeout} @@ -1490,6 +1496,13 @@ msg(#diameter_packet{msg = undefined, bin = Bin}) -> msg(#diameter_packet{msg = Msg}) -> Msg. +%% encode/3 + +encode(Dict, Pkt, Fs) -> + P = encode(Dict, Pkt), + eval_packet(P, Fs), + P. + %% encode/2 %% Note that prepare_request can return a diameter_packet containing @@ -1571,38 +1584,47 @@ send(Pid, Pkt) -> %% retransmit/4 -retransmit({TPid, Caps, #diameter_app{alias = Alias} = App}, - #request{app = Alias, - packet = Pkt} +retransmit({TPid, Caps, #diameter_app{alias = Alias} = App} = T, + #request{app = Alias, packet = Pkt} = Req, SvcName, Timeout) -> have_request(Pkt, TPid) %% Don't failover to a peer we've andalso ?THROW(timeout), %% already sent to. - case cb(App, prepare_retransmit, [Pkt, SvcName, {TPid, Caps}]) of - {send, P} -> - retransmit(make_request_packet(P, Pkt), TPid, Caps, Req, Timeout); - {discard, Reason} -> - ?THROW(Reason); - discard -> - ?THROW(discarded); - T -> - ?ERROR({invalid_return, prepare_retransmit, App, T}) - end. + resend_req(cb(App, prepare_retransmit, [Pkt, SvcName, {TPid, Caps}]), + T, + Req, + Timeout, + []). -%% retransmit/5 +resend_req({send, P}, T, #request{packet = Pkt} = Req, Timeout, Fs) -> + retransmit(make_request_packet(P, Pkt), T, Req, Timeout, Fs); -retransmit(Pkt, TPid, Caps, #request{dictionary = Dict} = Req, Timeout) -> - EPkt = encode(Dict, Pkt), +resend_req({discard, Reason}, _, _, _, _) -> + ?THROW(Reason); - NewReq = Req#request{transport = TPid, - packet = Pkt, - caps = Caps}, +resend_req(discard, _, _, _, _) -> + ?THROW(discarded); - ?LOG(retransmission, NewReq), - TRef = send_request(TPid, EPkt, NewReq, Timeout), - {TRef, NewReq}. +resend_req({eval_packet, RC, F}, T, Req, Timeout, Fs) -> + resend_req(RC, T, Req, Timeout, [F|Fs]); + +resend_req(T, {_, _, App}, _, _, _) -> + ?ERROR({invalid_return, prepare_retransmit, App, T}). + +%% retransmit/6 + +retransmit(Pkt, {TPid, Caps, _}, #request{dictionary = D} = Req0, Tmo, Fs) -> + EPkt = encode(D, Pkt, Fs), + + Req = Req0#request{transport = TPid, + packet = Pkt, + caps = Caps}, + + ?LOG(retransmission, Req), + TRef = send_request(TPid, EPkt, Req, Tmo), + {TRef, Req}. %% store_request/4 @@ -1805,7 +1827,12 @@ recv_request(T, TC, App, Pkt) -> %% (3xxx) errors that lead to an answer-message. request_cb({SvcName, _OH, _OR} = T, TC, App, Pkt) -> - request_cb(cb(App, handle_request, [Pkt, SvcName, TC]), App, T, TC, Pkt). + request_cb(cb(App, handle_request, [Pkt, SvcName, TC]), + App, + T, + TC, + [], + Pkt). %% examine/1 %% @@ -1825,7 +1852,7 @@ examine(#diameter_packet{errors = Es} = Pkt) -> Pkt#diameter_packet{errors = [5011 | Es]}. %% It's odd/unfortunate that this isn't a protocol error. -%% request_cb/5 +%% request_cb/6 %% A reply may be an answer-message, constructed either here or by %% the handle_request callback. The header from the incoming request @@ -1836,20 +1863,21 @@ request_cb({reply, Ans}, #diameter_app{dictionary = Dict}, _, {TPid, _}, + Fs, Pkt) -> - reply(Ans, Dict, TPid, Pkt); + reply(Ans, Dict, TPid, Fs, Pkt); %% An 3xxx result code, for which the E-bit is set in the header. -request_cb({protocol_error, RC}, _, T, {TPid, _}, Pkt) +request_cb({protocol_error, RC}, _, T, {TPid, _}, Fs, Pkt) when 3000 =< RC, RC < 4000 -> - protocol_error(RC, T, TPid, Pkt); + protocol_error(RC, T, TPid, Fs, Pkt); %% 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, _, T, {TPid, _}, Pkt) -> - protocol_error(3001, T, TPid, Pkt); +request_cb(noreply, _, T, {TPid, _}, Fs, Pkt) -> + protocol_error(3001, T, TPid, Fs, Pkt); %% 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 @@ -1871,26 +1899,36 @@ request_cb({A, Opts}, = App, T, TC, + Fs, Pkt) when A == relay, Id == ?APP_ID_RELAY; A == proxy, Id /= ?APP_ID_RELAY; A == resend -> - resend(Opts, App, T, TC, Pkt); + resend(Opts, App, T, TC, Fs, Pkt); -request_cb(discard, _, _, _, _) -> +request_cb(discard, _, _, _, _, _) -> ok; -request_cb({eval, RC, F}, App, T, TC, Pkt) -> - request_cb(RC, App, T, TC, Pkt), +request_cb({eval_packet, RC, F}, App, T, TC, Fs, Pkt) -> + request_cb(RC, App, T, TC, [F|Fs], Pkt); + +request_cb({eval, RC, F}, App, T, TC, Fs, Pkt) -> + request_cb(RC, App, T, TC, Pkt, Fs), diameter_lib:eval(F). -%% protocol_error/4 +%% protocol_error/5 -protocol_error(RC, {_, OH, OR}, TPid, #diameter_packet{avps = Avps} = Pkt) -> +protocol_error(RC, {_, OH, OR}, TPid, Fs, Pkt) -> + #diameter_packet{avps = Avps} = Pkt, ?LOG({error, RC}, Pkt), - reply(answer_message({OH, OR, RC}, Avps), ?BASE, TPid, Pkt). + reply(answer_message({OH, OR, RC}, Avps), ?BASE, TPid, Fs, Pkt). + +%% protocol_error/4 -%% resend/5 +protocol_error(RC, T, TPid, Pkt) -> + protocol_error(RC, T, TPid, [], Pkt). + +%% resend/6 %% %% Resend a message as a relay or proxy agent. @@ -1898,9 +1936,12 @@ resend(Opts, #diameter_app{} = App, {_SvcName, OH, _OR} = T, {_TPid, _Caps} = TC, + Fs, #diameter_packet{avps = Avps} = Pkt) -> {Code, _Flags, Vid} = ?BASE:avp_header('Route-Record'), - resend(is_loop(Code, Vid, OH, Avps), Opts, App, T, TC, Pkt). + resend(is_loop(Code, Vid, OH, Avps), Opts, App, T, TC, Fs, Pkt). + +%% resend/7 %% DIAMETER_LOOP_DETECTED 3005 %% An agent detected a loop while trying to get the message to the @@ -1908,8 +1949,8 @@ resend(Opts, %% if one is available, but the peer reporting the error has %% identified a configuration problem. -resend(true, _, _, T, {TPid, _}, Pkt) -> %% Route-Record loop - protocol_error(3005, T, TPid, Pkt); +resend(true, _, _, T, {TPid, _}, Fs, Pkt) -> %% Route-Record loop + protocol_error(3005, T, TPid, Fs, Pkt); %% 6.1.8. Relaying and Proxying Requests %% @@ -1922,6 +1963,7 @@ resend(false, App, {SvcName, _, _} = T, {TPid, #diameter_caps{origin_host = {_, OH}}}, + Fs, #diameter_packet{header = Hdr0, avps = Avps} = Pkt) -> @@ -1929,7 +1971,7 @@ resend(false, Seq = diameter_session:sequence(), Hdr = Hdr0#diameter_header{hop_by_hop_id = Seq}, Msg = [Hdr, Route | Avps], - resend(call(SvcName, App, Msg, Opts), T, TPid, Pkt). + resend(call(SvcName, App, Msg, Opts), T, TPid, Fs, Pkt). %% 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 @@ -1955,15 +1997,18 @@ resend(#diameter_packet{bin = B} = Pkt, _, TPid, + Fs, #diameter_packet{header = #diameter_header{hop_by_hop_id = Id}, transport_data = TD}) -> - send(TPid, Pkt#diameter_packet{bin = diameter_codec:hop_by_hop_id(Id, B), - transport_data = TD}); + P = Pkt#diameter_packet{bin = diameter_codec:hop_by_hop_id(Id, B), + transport_data = TD}, + eval_packet(P, Fs), + send(TPid, P); %% TODO: counters %% Or not: DIAMETER_UNABLE_TO_DELIVER. -resend(_, T, TPid, Pkt) -> - protocol_error(3002, T, TPid, Pkt). +resend(_, T, TPid, Fs, Pkt) -> + protocol_error(3002, T, TPid, Fs, Pkt). %% is_loop/4 %% @@ -1985,33 +2030,38 @@ is_loop(Code, Vid, OH, [_ | Avps]) is_loop(Code, Vid, OH, Avps) -> is_loop(Code, Vid, ?BASE:avp(encode, OH, 'Route-Record'), Avps). -%% reply/4 +%% reply/5 %% %% Send a locally originating reply. %% Skip the setting of Result-Code and Failed-AVP's below. -reply([Msg], Dict, TPid, Pkt) +reply([Msg], Dict, TPid, Fs, Pkt) when is_list(Msg); is_tuple(Msg) -> - reply(Msg, Dict, TPid, Pkt#diameter_packet{errors = []}); + reply(Msg, Dict, TPid, Fs, Pkt#diameter_packet{errors = []}); %% No errors or a diameter_header/avp list. -reply(Msg, Dict, TPid, #diameter_packet{errors = Es, - transport_data = TD} - = ReqPkt) +reply(Msg, Dict, TPid, Fs, #diameter_packet{errors = Es, + transport_data = TD} + = ReqPkt) when [] == Es; is_record(hd(Msg), diameter_header) -> Pkt = diameter_codec:encode(Dict, make_answer_packet(Msg, ReqPkt)), + eval_packet(Pkt, Fs), 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. -reply(Msg, Dict, TPid, #diameter_packet{errors = [H|_] = Es} = Pkt) -> +reply(Msg, Dict, TPid, Fs, #diameter_packet{errors = [H|_] = Es} = Pkt) -> reply(rc(Msg, rc(H), [A || {_,A} <- Es], Dict), Dict, TPid, + Fs, Pkt#diameter_packet{errors = []}). +eval_packet(Pkt, Fs) -> + lists:foreach(fun(F) -> diameter_lib:eval([F,Pkt]) end, Fs). + %% make_answer_packet/2 %% Binaries and header/avp lists are sent as-is. |