diff options
Diffstat (limited to 'lib/diameter/src/transport/diameter_sctp.erl')
| -rw-r--r-- | lib/diameter/src/transport/diameter_sctp.erl | 319 |
1 files changed, 259 insertions, 60 deletions
diff --git a/lib/diameter/src/transport/diameter_sctp.erl b/lib/diameter/src/transport/diameter_sctp.erl index 76aacabcb8..6a9f1f940b 100644 --- a/lib/diameter/src/transport/diameter_sctp.erl +++ b/lib/diameter/src/transport/diameter_sctp.erl @@ -52,21 +52,20 @@ %% Keys into process dictionary. -define(INFO_KEY, info). -define(REF_KEY, ref). +-define(TRANSPORT_KEY, transport). -define(ERROR(T), erlang:error({T, ?MODULE, ?LINE})). %% The default port for a listener. -define(DEFAULT_PORT, 3868). %% RFC 3588, ch 2.1 -%% Remote addresses to accept connections from. --define(DEFAULT_ACCEPT, []). %% any - %% How long to wait for a transport process to attach after %% association establishment. -define(ACCEPT_TIMEOUT, 5000). -type connect_option() :: {raddr, inet:ip_address()} | {rport, inet:port_number()} + | option() | term(). %% gen_sctp:open_option(). -type match() :: inet:ip_address() @@ -74,8 +73,14 @@ | [match()]. -type listen_option() :: {accept, match()} + | option() | term(). %% gen_sctp:open_option(). +-type option() :: {sender, boolean()} + | sender + | {packet, boolean() | raw} + | {message_cb, false | diameter:evaluable()}. + -type uint() :: non_neg_integer(). %% Accepting/connecting transport process state. @@ -87,20 +92,35 @@ %% {RAs, RP, Errors} | connect, socket :: gen_sctp:sctp_socket() | undefined, - assoc_id :: gen_sctp:assoc_id(), %% association identifier + active = false :: boolean(), %% is socket active? + recv = true :: boolean(), %% should it be active? + assoc_id :: gen_sctp:assoc_id() %% association identifier + | undefined + | true, peer :: {[inet:ip_address()], uint()} %% {RAs, RP} | undefined, streams :: {uint(), uint()} %% {InStream, OutStream} counts | undefined, - os = 0 :: uint()}). %% next output stream + os = 0 :: uint(), %% next output stream + packet = true :: boolean() %% legacy transport_data? + | raw, + message_cb = false :: false | diameter:evaluable(), + send = false :: pid() | boolean()}). %% sending process + +%% Monitor process state. +-record(monitor, + {transport :: pid(), + ack = false :: boolean(), + socket :: gen_sctp:sctp_socket(), + assoc_id :: gen_sctp:assoc_id()}). %% next output stream %% Listener process state. -record(listener, {ref :: reference(), socket :: gen_sctp:sctp_socket(), - service = false :: false | pid(), %% service process + service :: pid(), %% service process pending = {0, queue:new()}, - accept :: [match()]}). + opts :: [[match()] | boolean() | diameter:evaluable()]}). %% Field pending implements two queues: the first of transport-to-be %% processes to which an association has been assigned but for which %% diameter hasn't yet spawned a transport process, a short-lived @@ -132,11 +152,11 @@ start(T, Svc, Opts) when is_list(Opts) -> #diameter_service{capabilities = Caps, - pid = SPid} + pid = Pid} = Svc, diameter_sctp_sup:start(), %% start supervisors on demand Addrs = Caps#diameter_caps.host_ip_address, - s(T, Addrs, SPid, lists:map(fun ip/1, Opts)). + s(T, Addrs, Pid, lists:map(fun ip/1, Opts)). ip({ifaddr, A}) -> {ip, A}; @@ -147,9 +167,9 @@ ip(T) -> %% when there is not yet an association to assign it, or at comm_up on %% a new association in which case the call retrieves a transport from %% the pending queue. -s({accept, Ref} = A, Addrs, SPid, Opts) -> - {ok, LPid, LAs} = listener(Ref, {Opts, Addrs}), - try gen_server:call(LPid, {A, self(), SPid}, infinity) of +s({accept, Ref} = A, Addrs, SvcPid, Opts) -> + {ok, LPid, LAs} = listener(Ref, {Opts, SvcPid, Addrs}), + try gen_server:call(LPid, {A, self()}, infinity) of {ok, TPid} -> {ok, TPid, LAs}; No -> @@ -162,7 +182,7 @@ s({accept, Ref} = A, Addrs, SPid, Opts) -> %% gen_sctp in order to be able to accept a new association only %% *after* an accepting transport has been spawned. -s({connect = C, Ref}, Addrs, _SPid, Opts) -> +s({connect = C, Ref}, Addrs, _SvcPid, Opts) -> diameter_sctp_sup:start_child({C, self(), Opts, Addrs, Ref}). %% start_link/1 @@ -216,22 +236,39 @@ init(T) -> %% i/1 +i(#monitor{transport = TPid} = S) -> + monitor(process, TPid), + putr(?TRANSPORT_KEY, TPid), + proc_lib:init_ack({ok, self()}), + S; + %% A process owning a listening socket. -i({listen, Ref, {Opts, Addrs}}) -> +i({listen, Ref, {Opts, SvcPid, Addrs}}) -> + monitor(process, SvcPid), [_] = diameter_config:subscribe(Ref, transport), %% assert existence - {[Matches], Rest} = proplists:split(Opts, [accept]), + {Split, Rest} + = proplists:split(Opts, [accept, packet, sender, message_cb]), + OwnOpts = lists:append(Split), {LAs, Sock} = AS = open(Addrs, Rest, ?DEFAULT_PORT), ok = gen_sctp:listen(Sock, true), true = diameter_reg:add_new({?MODULE, listener, {Ref, AS}}), proc_lib:init_ack({ok, self(), LAs}), #listener{ref = Ref, + service = SvcPid, socket = Sock, - accept = [[M] || {accept, M} <- Matches]}; + opts = [[[M] || {accept, M} <- OwnOpts], + proplists:get_value(packet, OwnOpts, true) + | [proplists:get_value(K, OwnOpts, false) + || K <- [sender, message_cb]]]}; %% A connecting transport. i({connect, Pid, Opts, Addrs, Ref}) -> - {[As, Ps], Rest} = proplists:split(Opts, [raddr, rport]), - RAs = [diameter_lib:ipaddr(A) || {raddr, A} <- As], + {[Ps | Split], Rest} + = proplists:split(Opts, [rport, raddr, packet, sender, message_cb]), + OwnOpts = lists:append(Split), + CB = proplists:get_value(message_cb, OwnOpts, false), + false == CB orelse (Pid ! {diameter, ack}), + RAs = [diameter_lib:ipaddr(A) || {raddr, A} <- OwnOpts], [RP] = [P || {rport, P} <- Ps] ++ [P || P <- [?DEFAULT_PORT], [] == Ps], {LAs, Sock} = open(Addrs, Rest, 0), putr(?REF_KEY, Ref), @@ -239,7 +276,10 @@ i({connect, Pid, Opts, Addrs, Ref}) -> monitor(process, Pid), #transport{parent = Pid, mode = {connect, connect(Sock, RAs, RP, [])}, - socket = Sock}; + socket = Sock, + message_cb = CB, + packet = proplists:get_value(packet, OwnOpts, true), + send = proplists:get_value(sender, OwnOpts, false)}; %% An accepting transport spawned by diameter, not yet owning an %% association. @@ -273,11 +313,16 @@ i({K, Ref}, #transport{mode = {accept, _}} = S) -> receive {Ref, Pid} when K == parent -> %% transport process started S#transport{parent = Pid}; - {K, T, Matches} when K == peeloff -> %% association + {K, T, Opts} when K == peeloff -> %% association {sctp, Sock, _RA, _RP, _Data} = T, + [Matches, Packet, Sender, CB] = Opts, ok = accept_peer(Sock, Matches), demonitor(Ref, [flush]), - t(T, S#transport{socket = Sock}); + false == CB orelse (S#transport.parent ! {diameter, ack}), + t(T, S#transport{socket = Sock, + message_cb = CB, + packet = Packet, + send = Sender}); accept_timeout = T -> x(T); {'DOWN', _, process, _, _} = T -> @@ -374,13 +419,9 @@ handle_call({{accept, Ref}, Pid}, _, #listener{ref = Ref} = S) -> {TPid, NewS} = accept(Ref, Pid, S), {reply, {ok, TPid}, NewS}; -handle_call({{accept, _} = T, Pid, SPid}, From, #listener{service = P} = S) -> - handle_call({T, Pid}, From, if not is_pid(P), is_pid(SPid) -> - monitor(process, SPid), - S#listener{service = SPid}; - true -> - S - end); +%% Transport is telling us of parent death. +handle_call({stop, _Pid} = Reason, _From, #monitor{} = S) -> + {stop, {shutdown, Reason}, ok, S}; handle_call(_, _, State) -> {reply, nok, State}. @@ -400,7 +441,11 @@ handle_info(T, #transport{} = S) -> {noreply, #transport{} = t(T,S)}; handle_info(T, #listener{} = S) -> - {noreply, #listener{} = l(T,S)}. + {noreply, #listener{} = l(T,S)}; + +handle_info(T, #monitor{} = S) -> + m(T,S), + {noreply, S}. %% Prior to the possibility of setting pool_size on in transport %% configuration, a new accepting transport was only started following @@ -422,6 +467,9 @@ code_change(_, State, _) -> %% # terminate/2 %% --------------------------------------------------------------------------- +terminate(_, #monitor{}) -> + ok; + terminate(_, #transport{assoc_id = undefined}) -> ok; @@ -445,11 +493,11 @@ getr(Key) -> %% Incoming message from SCTP. l({sctp, Sock, _RA, _RP, Data} = T, #listener{socket = Sock, - accept = Matches} + opts = Opts} = S) -> Id = assoc_id(Data), {TPid, NewS} = accept(S), - TPid ! {peeloff, setelement(2, T, peeloff(Sock, Id, TPid)), Matches}, + TPid ! {peeloff, setelement(2, T, peeloff(Sock, Id, TPid)), Opts}, setopts(Sock), NewS; @@ -503,12 +551,21 @@ t(T,S) -> %% Incoming message. transition({sctp, Sock, _RA, _RP, Data}, #transport{socket = Sock} = S) -> - setopts(Sock), - recv(Data, S); + setopts(S, recv(Data, S#transport{active = false})); %% Outgoing message. transition({diameter, {send, Msg}}, S) -> - send(Msg, S); + message(send, Msg, S); + +%% Monitor has sent an outgoing message. +transition(Msg, S) + when is_record(Msg, diameter_packet); + is_binary(Msg) -> + message(ack, Msg, S); + +%% Deferred actions from a message_cb. +transition({actions, Dir, Acts}, S) -> + actions(Acts, Dir, S); %% Request to close the transport connection. transition({diameter, {close, Pid}}, #transport{parent = Pid}) -> @@ -522,8 +579,18 @@ transition({diameter, {close, Pid}}, #transport{parent = Pid}) -> transition({diameter, {tls, _Ref, _Type, _Bool}}, _) -> stop; -%% Parent process has died. -transition({'DOWN', _, process, Pid, _}, #transport{parent = Pid}) -> +%% Parent process has died: call the monitor to not close the socket +%% during an ongoing send, but don't let it take forever. +transition({'DOWN', _, process, Pid, _}, #transport{parent = Pid, + send = MPid}) -> + is_boolean(MPid) + orelse ok == (catch gen_server:call(MPid, {stop, Pid})) + orelse exit(MPid, kill), + stop; + +%% Monitor process has died. +transition({'DOWN', _, process, MPid, _}, #transport{send = MPid}) + when is_pid(MPid) -> stop; %% Timeout after transport process has been started. @@ -536,6 +603,18 @@ transition({resolve_port, Pid}, #transport{socket = Sock}) Pid ! inet:port(Sock), ok. +%% m/2 + +m({Msg, StreamId}, #monitor{socket = Sock, + transport = TPid, + assoc_id = AId, + ack = B}) -> + send(Sock, AId, StreamId, Msg), + B andalso (TPid ! Msg); + +m({'DOWN', _, process, TPid, _} = T, #monitor{transport = TPid}) -> + x(T). + %% Crash on anything unexpected. ok({ok, T}) -> @@ -578,33 +657,52 @@ q(Ref, Pid, #listener{pending = {_,Q}}) -> %% send/2 +%% Start monitor process on first send. +send(Msg, #transport{send = true, + socket = Sock, + assoc_id = AId, + message_cb = CB} + = S) -> + {ok, MPid} = diameter_sctp_sup:start_child(#monitor{transport = self(), + socket = Sock, + assoc_id = AId, + ack = false /= CB}), + monitor(process, MPid), + send(Msg, S#transport{send = MPid}); + %% Outbound Diameter message on a specified stream ... -send(#diameter_packet{bin = Bin, transport_data = {outstream, SId}}, +send(#diameter_packet{transport_data = {outstream, SId}} + = Msg, #transport{streams = {_, OS}} = S) -> - send(SId rem OS, Bin, S), - S; + send(SId rem OS, Msg, S); %% ... or not: rotate through all streams. -send(#diameter_packet{bin = Bin}, S) -> - send(Bin, S); -send(Bin, #transport{streams = {_, OS}, +send(Msg, #transport{streams = {_, OS}, os = N} - = S) - when is_binary(Bin) -> - send(N, Bin, S), - S#transport{os = (N + 1) rem OS}. + = S) -> + send(N, Msg, S#transport{os = (N + 1) rem OS}). %% send/3 -send(StreamId, Bin, #transport{socket = Sock, - assoc_id = AId}) -> - send(Sock, AId, StreamId, Bin). +send(StreamId, Msg, #transport{send = false, + socket = Sock, + assoc_id = AId} + = S) -> + send(Sock, AId, StreamId, Msg), + message(ack, Msg, S); + +send(StreamId, Msg, #transport{send = MPid} = S) -> + MPid ! {Msg, StreamId}, + S. %% send/4 -send(Sock, AssocId, Stream, Bin) -> - case gen_sctp:send(Sock, AssocId, Stream, Bin) of +send(Sock, AssocId, StreamId, #diameter_packet{bin = Bin}) -> + send(Sock, AssocId, StreamId, Bin); + +send(Sock, AssocId, StreamId, Bin) -> + case gen_sctp:send(Sock, AssocId, StreamId, Bin) of ok -> ok; {error, Reason} -> @@ -624,7 +722,9 @@ recv({_, #sctp_assoc_change{state = comm_up, = S) -> Ref = getr(?REF_KEY), publish(T, Ref, Id, Sock), - up(S#transport{assoc_id = Id, + %% Deal with different association id after peeloff on Solaris by + %% taking the id from the first reception. + up(S#transport{assoc_id = T == accept orelse Id, streams = {IS, OS}}); %% ... or not: try the next address. @@ -639,17 +739,19 @@ recv({_, #sctp_assoc_change{} = E}, recv({_, #sctp_assoc_change{}}, _) -> stop; +%% First inbound on an accepting transport. +recv({[#sctp_sndrcvinfo{assoc_id = Id}], _Bin} + = T, + #transport{assoc_id = true} + = S) -> + recv(T, S#transport{assoc_id = Id}); + %% Inbound Diameter message. -recv({[#sctp_sndrcvinfo{stream = Id}], Bin}, #transport{parent = Pid}) +recv({[#sctp_sndrcvinfo{}], Bin} = Msg, S) when is_binary(Bin) -> - diameter_peer:recv(Pid, #diameter_packet{transport_data = {stream, Id}, - bin = Bin}), - ok; + message(recv, Msg, S); -recv({_, #sctp_shutdown_event{assoc_id = A}}, - #transport{assoc_id = Id}) - when A == Id; - A == 0 -> +recv({_, #sctp_shutdown_event{}}, _) -> stop; %% Note that diameter_sctp(3) documents that sctp_events cannot be @@ -765,6 +867,23 @@ connect(Sock, [Addr | AT] = As, Port, Reasons) -> connect(Sock, AT, Port, [{Addr, E} | Reasons]) end. +%% setopts/2 + +setopts(_, #transport{socket = Sock, + active = A, + recv = B} + = S) + when B, not A -> + setopts(Sock), + S#transport{active = true}; + +setopts(_, #transport{} = S) -> + S; + +setopts(#transport{socket = Sock}, T) -> + setopts(Sock), + T. + %% setopts/1 setopts(Sock) -> @@ -772,3 +891,83 @@ setopts(Sock) -> ok -> ok; X -> x({setopts, Sock, X}) %% possibly on peer disconnect end. + +%% A message_cb is invoked whenever a message is sent or received, or +%% to provide acknowledgement of a completed send or discarded +%% request. See diameter_tcp for semantics, the only difference being +%% that a recv callback can get a diameter_packet record as Msg +%% depending on how/if option packet has been specified. + +%% message/3 + +message(send, false = M, S) -> + message(ack, M, S); + +message(ack, _, #transport{message_cb = false} = S) -> + S; + +message(Dir, Msg, S) -> + setopts(S, actions(cb(S, Dir, Msg), Dir, S)). + +%% actions/3 + +actions([], _, S) -> + S; + +actions([B | As], Dir, S) + when is_boolean(B) -> + actions(As, Dir, S#transport{recv = B}); + +actions([Dir | As], _, S) + when Dir == send; + Dir == recv -> + actions(As, Dir, S); + +actions([Msg | As], send = Dir, S) + when is_record(Msg, diameter_packet); + is_binary(Msg) -> + actions(As, Dir, send(Msg, S)); + +actions([Msg | As], recv = Dir, #transport{parent = Pid} = S) + when is_record(Msg, diameter_packet); + is_binary(Msg) -> + diameter_peer:recv(Pid, Msg), + actions(As, Dir, S); + +actions([{defer, Tmo, Acts} | As], Dir, S) -> + erlang:send_after(Tmo, self(), {actions, Dir, Acts}), + actions(As, Dir, S); + +actions(CB, _, S) -> + S#transport{message_cb = CB}. + +%% cb/3 + +cb(#transport{message_cb = false, packet = P}, recv, Msg) -> + [pkt(P, true, Msg)]; + +cb(#transport{message_cb = CB, packet = P}, recv = D, Msg) -> + cb(CB, D, pkt(P, false, Msg)); + +cb(#transport{message_cb = CB}, Dir, Msg) -> + cb(CB, Dir, Msg); + +cb(false, send, Msg) -> + [Msg]; + +cb(CB, Dir, Msg) -> + diameter_lib:eval([CB, Dir, Msg]). + +%% pkt/3 + +pkt(false, _, {_Info, Bin}) -> + Bin; + +pkt(true, _, {[#sctp_sndrcvinfo{stream = Id}], Bin}) -> + #diameter_packet{bin = Bin, transport_data = {stream, Id}}; + +pkt(raw, true, {[Info], Bin}) -> + #diameter_packet{bin = Bin, transport_data = Info}; + +pkt(raw, false, {[_], _} = Msg) -> + Msg. |