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-rw-r--r--lib/diameter/src/base/diameter_config.erl106
-rw-r--r--lib/diameter/src/base/diameter_config_sup.erl58
-rw-r--r--lib/diameter/src/base/diameter_reg.erl423
-rw-r--r--lib/diameter/src/base/diameter_service.erl49
-rw-r--r--lib/diameter/src/base/diameter_sup.erl3
-rw-r--r--lib/diameter/src/modules.mk3
-rw-r--r--lib/diameter/src/transport/diameter_sctp.erl37
-rw-r--r--lib/diameter/src/transport/diameter_tcp.erl31
8 files changed, 482 insertions, 228 deletions
diff --git a/lib/diameter/src/base/diameter_config.erl b/lib/diameter/src/base/diameter_config.erl
index 702f11593a..73b828536b 100644
--- a/lib/diameter/src/base/diameter_config.erl
+++ b/lib/diameter/src/base/diameter_config.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -45,10 +45,12 @@
add_transport/2,
remove_transport/2,
have_transport/2,
- lookup/1]).
+ lookup/1,
+ subscribe/2]).
-%% child server start
--export([start_link/0]).
+%% server start
+-export([start_link/0,
+ start_link/1]).
%% gen_server callbacks
-export([init/1,
@@ -58,8 +60,9 @@
handle_info/2,
code_change/3]).
-%% diameter_sync requests.
--export([sync/1]).
+%% callbacks
+-export([sync/1, %% diameter_sync requests
+ remove/0]). %% transport server termination
%% debug
-export([state/0,
@@ -77,6 +80,9 @@
%% Table config is written to.
-define(TABLE, ?MODULE).
+%% Key on which a transport-specific child registers itself.
+-define(TRANSPORT_KEY(Ref), {?MODULE, transport, Ref}).
+
%% Workaround for dialyzer's lack of understanding of match specs.
-type match(T)
:: T | '_' | '$1' | '$2' | '$3' | '$4'.
@@ -225,6 +231,13 @@ pred(_) ->
?THROW(pred).
%% --------------------------------------------------------------------------
+%% # subscribe/2
+%% --------------------------------------------------------------------------
+
+subscribe(Ref, T) ->
+ diameter_reg:subscribe(?TRANSPORT_KEY(Ref), T).
+
+%% --------------------------------------------------------------------------
%% # have_transport/2
%%
%% Output: true | false
@@ -264,6 +277,9 @@ start_link() ->
Options = [{spawn_opt, diameter_lib:spawn_opts(server, [])}],
gen_server:start_link(ServerName, Module, Args, Options).
+start_link(T) ->
+ proc_lib:start_link(?MODULE, init, [T], infinity, []).
+
state() ->
call(state).
@@ -274,8 +290,42 @@ uptime() ->
%%% # init/1
%%% ----------------------------------------------------------
+%% ?SERVER start.
init([]) ->
- {ok, #state{}}.
+ {ok, #state{}};
+
+%% Child start as a consequence of add_transport.
+init({SvcName, Type, Opts}) ->
+ Res = try
+ add(SvcName, Type, Opts)
+ catch
+ ?FAILURE(Reason) -> {error, Reason}
+ end,
+ proc_lib:init_ack({ok, self(), Res}),
+ sleep(Res).
+
+%% sleep/1
+
+sleep({ok, _}) ->
+ sleep();
+
+sleep({error, _}) ->
+ ok. %% die
+
+%% sleep/0
+
+sleep() ->
+ proc_lib:hibernate(?MODULE, remove, []).
+
+%% remove/0
+
+remove() ->
+ receive
+ {?MODULE, stop} ->
+ ok;
+ _ ->
+ sleep()
+ end.
%%% ----------------------------------------------------------
%%% # handle_call/2
@@ -404,19 +454,22 @@ sync({start_service, SvcName, Opts}) ->
sync({stop_service, SvcName}) ->
stop(SvcName);
+%% Start a child whose only purpose is to be alive for the lifetime of
+%% the transport configuration and publish itself in diameter_reg.
+%% This is to provide a way for processes to to be notified when the
+%% configuration is removed (diameter_reg:subscribe/2).
sync({add, SvcName, Type, Opts}) ->
- try
- add(SvcName, Type, Opts)
- catch
- ?FAILURE(Reason) -> {error, Reason}
- end;
+ {ok, _Pid, Res} = diameter_config_sup:start_child({SvcName, Type, Opts}),
+ Res;
sync({remove, SvcName, Pred}) ->
- remove(select([{#transport{service = '$1', _ = '_'},
+ Recs = select([{#transport{service = '$1', _ = '_'},
[{'=:=', '$1', {const, SvcName}}],
['$_']}]),
- SvcName,
- Pred).
+ F = fun(#transport{ref = R, type = T, options = O}) ->
+ Pred(R,T,O)
+ end,
+ remove(SvcName, lists:filter(F, Recs)).
%% start/3
@@ -503,6 +556,7 @@ add(SvcName, Type, Opts) ->
ok = transport_opts(Opts),
Ref = make_ref(),
+ true = diameter_reg:add_new(?TRANSPORT_KEY(Ref)),
T = {Ref, Type, Opts},
%% The call to the service returns error if the service isn't
%% started yet, which is harmless. The transport will be started
@@ -594,26 +648,30 @@ start_transport(SvcName, T) ->
No
end.
-%% remove/3
-
-remove(L, SvcName, Pred) ->
- rm(SvcName, lists:filter(fun(#transport{ref = R, type = T, options = O}) ->
- Pred(R,T,O)
- end,
- L)).
+%% remove/2
-rm(_, []) ->
+remove(_, []) ->
ok;
-rm(SvcName, L) ->
+
+remove(SvcName, L) ->
Refs = lists:map(fun(#transport{ref = R}) -> R end, L),
case stop_transport(SvcName, Refs) of
ok ->
+ lists:foreach(fun stop_child/1, Refs),
diameter_stats:flush(Refs),
lists:foreach(fun delete_object/1, L);
{error, _} = No ->
No
end.
+stop_child(Ref) ->
+ case diameter_reg:match(?TRANSPORT_KEY(Ref)) of
+ [{_, Pid}] -> %% tell the transport-specific child to die
+ Pid ! {?MODULE, stop};
+ [] -> %% already removed/dead
+ ok
+ end.
+
stop_transport(SvcName, Refs) ->
case diameter_service:stop_transport(SvcName, Refs) of
ok ->
diff --git a/lib/diameter/src/base/diameter_config_sup.erl b/lib/diameter/src/base/diameter_config_sup.erl
new file mode 100644
index 0000000000..9524573378
--- /dev/null
+++ b/lib/diameter/src/base/diameter_config_sup.erl
@@ -0,0 +1,58 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2016. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+%% Supervisor for config processes.
+%%
+
+-module(diameter_config_sup).
+
+-behaviour(supervisor).
+
+%% interface
+-export([start_link/0, %% supervisor start
+ start_child/1]). %% config start
+
+-export([init/1]).
+
+-define(NAME, ?MODULE). %% supervisor name
+
+%% start_link/0
+
+start_link() ->
+ SupName = {local, ?NAME},
+ supervisor:start_link(SupName, ?MODULE, []).
+
+%% start_child/1
+
+start_child(T) ->
+ supervisor:start_child(?NAME, [T]).
+
+%% init/1
+
+init([]) ->
+ Mod = diameter_config,
+ Flags = {simple_one_for_one, 0, 1},
+ ChildSpec = {Mod,
+ {Mod, start_link, []},
+ temporary,
+ 1000,
+ worker,
+ [Mod]},
+ {ok, {Flags, [ChildSpec]}}.
diff --git a/lib/diameter/src/base/diameter_reg.erl b/lib/diameter/src/base/diameter_reg.erl
index 7f198080ba..9027130063 100644
--- a/lib/diameter/src/base/diameter_reg.erl
+++ b/lib/diameter/src/base/diameter_reg.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -25,14 +25,12 @@
-module(diameter_reg).
-behaviour(gen_server).
--compile({no_auto_import, [monitor/2]}).
-
-export([add/1,
add_new/1,
- del/1,
- repl/2,
+ remove/1,
match/1,
- wait/1]).
+ wait/1,
+ subscribe/2]).
-export([start_link/0]).
@@ -46,29 +44,32 @@
%% test
-export([pids/0,
- terms/0]).
+ terms/0,
+ subs/0,
+ waits/0]).
%% debug
-export([state/0,
uptime/0]).
--include("diameter_internal.hrl").
-
-define(SERVER, ?MODULE).
-define(TABLE, ?MODULE).
-%% Table entry used to keep from starting more than one monitor on the
-%% same process. This isn't a problem but there's no point in starting
-%% multiple monitors if we can avoid it. Note that we can't have a 2-tuple
-%% keyed on Pid since a registered term can be anything. Want the entry
-%% keyed on Pid so that lookup is fast.
--define(MONITOR(Pid, MRef), {Pid, monitor, MRef}).
-
-%% Table entry containing the Term -> Pid mapping.
--define(MAPPING(Term, Pid), {Term, Pid}).
+-type key() :: term().
+-type from() :: {pid(), term()}.
+-type pattern() :: term().
-record(state, {id = diameter_lib:now(),
- q = []}). %% [{From, Pat}]
+ receivers = dict:new()
+ :: dict:dict(pattern(), [[pid() | term()]%% subscribe
+ | from()]), %% wait
+ monitors = sets:new() :: sets:set(pid())}).
+
+%% The ?TABLE bag contains the Key -> Pid mapping, as {Key, Pid}
+%% tuples. Each pid is stored in the monitors set to ensure only one
+%% monitor for each pid: more are harmless, but unnecessary. A pattern
+%% is added to receivers a result of calls to wait/1 or subscribe/2:
+%% changes to ?TABLE causes processes to be notified as required.
%% ===========================================================================
%% # add(T)
@@ -77,18 +78,18 @@
%% this or other assocations can be retrieved using match/1.
%%
%% An association is removed when the calling process dies or as a
-%% result of calling del/1. Adding the same term more than once is
-%% equivalent to adding it exactly once.
+%% result of calling remove/1. Adding the same term more than once is
+%% equivalent to adding it once.
%%
%% Note that since match/1 takes a pattern as argument, specifying a
%% term that contains match variables is probably not a good idea
%% ===========================================================================
--spec add(any())
+-spec add(key())
-> true.
add(T) ->
- call({add, fun ets:insert/2, T, self()}).
+ call({add, false, T}).
%% ===========================================================================
%% # add_new(T)
@@ -97,36 +98,23 @@ add(T) ->
%% association, false being returned if an association already exists.
%% ===========================================================================
--spec add_new(any())
+-spec add_new(key())
-> boolean().
add_new(T) ->
- call({add, fun insert_new/2, T, self()}).
+ call({add, true, T}).
%% ===========================================================================
-%% # repl(T, NewT)
-%%
-%% Like add/1 but only replace an existing association on T, false
-%% being returned if it doesn't exist.
-%% ===========================================================================
-
--spec repl(any(), any())
- -> boolean().
-
-repl(T, U) ->
- call({repl, T, U, self()}).
-
-%% ===========================================================================
-%% # del(Term)
+%% # remove(Term)
%%
%% Remove any existing association of Term with self().
%% ===========================================================================
--spec del(any())
+-spec remove(key())
-> true.
-del(T) ->
- call({del, T, self()}).
+remove(T) ->
+ call({remove, T}).
%% ===========================================================================
%% # match(Pat)
@@ -139,12 +127,17 @@ del(T) ->
%% associations removed.)
%% ===========================================================================
--spec match(any())
- -> [{term(), pid()}].
+-spec match(pattern())
+ -> [{key(), pid()}].
match(Pat) ->
- ets:match_object(?TABLE, ?MAPPING(Pat, '_')).
+ match(Pat, '_').
+
+%% match/2
+match(Pat, Pid) ->
+ ets:match_object(?TABLE, {Pat, Pid}).
+
%% ===========================================================================
%% # wait(Pat)
%%
@@ -152,10 +145,29 @@ match(Pat) ->
%% It's up to the caller to ensure that the wait won't be forever.
%% ===========================================================================
+-spec wait(pattern())
+ -> [{key(), pid()}].
+
wait(Pat) ->
+ _ = match(Pat), %% ensure match can succeed
call({wait, Pat}).
%% ===========================================================================
+%% # subscribe(Pat, T)
+%%
+%% Like match/1, but additionally receive messages of the form
+%% {T, add|remove, {term(), pid()} when associations are added
+%% or removed.
+%% ===========================================================================
+
+-spec subscribe(Pat :: any(), T :: term())
+ -> [{term(), pid()}].
+
+subscribe(Pat, T) ->
+ _ = match(Pat), %% ensure match can succeed
+ call({subscribe, Pat, T}).
+
+%% ===========================================================================
start_link() ->
ServerName = {local, ?SERVER},
@@ -169,19 +181,15 @@ uptime() ->
call(uptime).
%% pids/0
-%%
-%% Return: list of {Pid, [Term, ...]}
+
+-spec pids()
+ -> [{pid(), [key()]}].
pids() ->
to_list(fun swap/1).
to_list(Fun) ->
- ets:foldl(fun(T,A) -> acc(Fun, T, A) end, orddict:new(), ?TABLE).
-
-acc(Fun, ?MAPPING(Term, Pid), Dict) ->
- append(Fun({Term, Pid}), Dict);
-acc(_, _, Dict) ->
- Dict.
+ ets:foldl(fun(T,D) -> append(Fun(T), D) end, orddict:new(), ?TABLE).
append({K,V}, Dict) ->
orddict:append(K, V, Dict).
@@ -189,14 +197,47 @@ append({K,V}, Dict) ->
id(T) -> T.
%% terms/0
-%%
-%% Return: list of {Term, [Pid, ...]}
+
+-spec terms()
+ -> [{key(), [pid()]}].
terms() ->
to_list(fun id/1).
swap({X,Y}) -> {Y,X}.
+%% subs/0
+
+-spec subs()
+ -> [{pattern(), [{pid(), term()}]}].
+
+subs() ->
+ #state{receivers = RD} = state(),
+ dict:fold(fun sub/3, orddict:new(), RD).
+
+sub(Pat, Ps, Dict) ->
+ lists:foldl(fun([P|T], D) -> orddict:append(Pat, {P,T}, D);
+ (_, D) -> D
+ end,
+ Dict,
+ Ps).
+
+%% waits/0
+
+-spec waits()
+ -> [{pattern(), [{from(), term()}]}].
+
+waits() ->
+ #state{receivers = RD} = state(),
+ dict:fold(fun wait/3, orddict:new(), RD).
+
+wait(Pat, Ps, Dict) ->
+ lists:foldl(fun({_,_} = F, D) -> orddict:append(Pat, F, D);
+ (_, D) -> D
+ end,
+ Dict,
+ Ps).
+
%% ----------------------------------------------------------
%% # init/1
%% ----------------------------------------------------------
@@ -209,57 +250,58 @@ init(_) ->
%% # handle_call/3
%% ----------------------------------------------------------
-handle_call({add, Fun, Key, Pid}, _, S) ->
- B = Fun(?TABLE, {Key, Pid}),
- monitor(B andalso no_monitor(Pid), Pid),
- {reply, B, pending(B, S)};
-
-handle_call({del, Key, Pid}, _, S) ->
- {reply, ets:delete_object(?TABLE, ?MAPPING(Key, Pid)), S};
-
-handle_call({repl, T, U, Pid}, _, S) ->
- MatchSpec = [{?MAPPING('$1', Pid),
- [{'=:=', '$1', {const, T}}],
- ['$_']}],
- {reply, repl(ets:select(?TABLE, MatchSpec), U, Pid), S};
-
-handle_call({wait, Pat}, From, #state{q = Q} = S) ->
- case find(Pat) of
- {ok, L} ->
- {reply, L, S};
- false ->
- {noreply, S#state{q = [{From, Pat} | Q]}}
+handle_call({add, Uniq, Key}, {Pid, _}, S0) ->
+ Rec = {Key, Pid},
+ S1 = flush(Uniq, Rec, S0),
+ {Res, New} = insert(Uniq, Rec),
+ {Recvs, S} = add(New, Rec, S1),
+ notify(Recvs, Rec),
+ {reply, Res, S};
+
+handle_call({remove, Key}, {Pid, _}, S) ->
+ Rec = {Key, Pid},
+ Recvs = delete([Rec], S),
+ ets:delete_object(?TABLE, Rec),
+ notify(Recvs, remove),
+ {reply, true, S};
+
+handle_call({wait, Pat}, {Pid, _} = From, #state{receivers = RD} = S) ->
+ NS = add_monitor(Pid, S),
+ case match(Pat) of
+ [_|_] = L ->
+ {reply, L, NS};
+ [] ->
+ {noreply, NS#state{receivers = dict:append(Pat, From, RD)}}
end;
+handle_call({subscribe, Pat, T}, {Pid, _}, #state{receivers = RD} = S) ->
+ NS = add_monitor(Pid, S),
+ {reply, match(Pat), NS#state{receivers = dict:append(Pat, [Pid | T], RD)}};
+
handle_call(state, _, S) ->
{reply, S, S};
handle_call(uptime, _, #state{id = Time} = S) ->
{reply, diameter_lib:now_diff(Time), S};
-handle_call(Req, From, S) ->
- ?UNEXPECTED([Req, From]),
+handle_call(_Req, _From, S) ->
{reply, nok, S}.
%% ----------------------------------------------------------
%% # handle_cast/2
%% ----------------------------------------------------------
-handle_cast(Msg, S)->
- ?UNEXPECTED([Msg]),
+handle_cast(_Msg, S)->
{noreply, S}.
%% ----------------------------------------------------------
%% # handle_info/2
%% ----------------------------------------------------------
-handle_info({'DOWN', MRef, process, Pid, _}, S) ->
- ets:delete_object(?TABLE, ?MONITOR(Pid, MRef)),
- ets:match_delete(?TABLE, ?MAPPING('_', Pid)),
- {noreply, S};
+handle_info({'DOWN', _MRef, process, Pid, _}, S) ->
+ {noreply, down(Pid, S)};
-handle_info(Info, S) ->
- ?UNEXPECTED([Info]),
+handle_info(_Info, S) ->
{noreply, S}.
%% ----------------------------------------------------------
@@ -278,71 +320,166 @@ code_change(_OldVsn, State, _Extra) ->
%% ===========================================================================
-monitor(true, Pid) ->
- ets:insert(?TABLE, ?MONITOR(Pid, erlang:monitor(process, Pid)));
-monitor(false, _) ->
- ok.
+%% insert/2
+
+insert(false, Rec) ->
+ Spec = [{'$1', [{'==', '$1', {const, Rec}}], ['$_']}],
+ X = '$end_of_table' /= ets:select(?TABLE, Spec, 1), %% entry exists?
+ X orelse ets:insert(?TABLE, Rec),
+ {true, not X};
-%% Do we need a monitor for the specified Pid?
-no_monitor(Pid) ->
- [] == ets:match_object(?TABLE, ?MONITOR(Pid, '_')).
+insert(true, Rec) ->
+ B = ets:insert_new(?TABLE, Rec), %% entry inserted?
+ {B, B}.
-%% insert_new/2
+%% add/3
-insert_new(?TABLE, {Key, _} = T) ->
- flush(ets:lookup(?TABLE, Key)),
- ets:insert_new(?TABLE, T).
+%% Only add a single monitor for any given process, since there's no
+%% use to more.
+add(true, {_Key, Pid} = Rec, S) ->
+ NS = add_monitor(Pid, S),
+ {Recvs, RD} = add(Rec, NS),
+ {Recvs, S#state{receivers = RD}};
+
+add(false = No, _, S) ->
+ {No, S}.
+
+%% add/2
+
+%% Notify processes whose patterns match the inserted key.
+add({_Key, Pid} = Rec, #state{receivers = RD}) ->
+ dict:fold(fun(Pt, Ps, A) ->
+ add(lists:member(Rec, match(Pt, Pid)), Pt, Ps, Rec, A)
+ end,
+ {sets:new(), RD},
+ RD).
+
+%% add/5
+
+add(true, Pat, Recvs, {_,_} = Rec, {Set, Dict}) ->
+ {lists:foldl(fun sets:add_element/2, Set, Recvs),
+ remove(fun erlang:is_list/1, Pat, Recvs, Dict)};
+
+add(false, _, _, _, Acc) ->
+ Acc.
+
+%% add_monitor/2
+
+add_monitor(Pid, #state{monitors = MS} = S) ->
+ add_monitor(sets:is_element(Pid, MS), Pid, S).
+
+%% add_monitor/3
+
+add_monitor(false, Pid, #state{monitors = MS} = S) ->
+ monitor(process, Pid),
+ S#state{monitors = sets:add_element(Pid, MS)};
+
+add_monitor(true, _, S) ->
+ S.
+
+%% delete/2
+
+delete(Recs, #state{receivers = RD}) ->
+ lists:foldl(fun(R,S) -> delete(R, RD, S) end, sets:new(), Recs).
+
+%% delete/3
+
+delete({_Key, Pid} = Rec, RD, Set) ->
+ dict:fold(fun(Pt, Ps, S) ->
+ delete(lists:member(Rec, match(Pt, Pid)), Rec, Ps, S)
+ end,
+ Set,
+ RD).
+
+%% delete/4
+
+%% Entry matches a pattern ...
+delete(true, Rec, Recvs, Set) ->
+ lists:foldl(fun(R,S) -> sets:add_element({R, Rec}, S) end,
+ Set,
+ Recvs);
+
+%% ... or not.
+delete(false, _, _, Set) ->
+ Set.
+
+%% notify/2
+
+notify(false = No, _) ->
+ No;
+
+notify(Recvs, remove = Op) ->
+ sets:fold(fun({P,R}, N) -> send(P, R, Op), N+1 end, 0, Recvs);
+
+notify(Recvs, {_,_} = Rec) ->
+ sets:fold(fun(P,N) -> send(P, Rec, add), N+1 end, 0, Recvs).
+
+%% send/3
+
+%% No processes waiting on remove, by construction: they've either
+%% received notification at add or aren't waiting.
+send([Pid | T], Rec, Op) ->
+ Pid ! {T, Op, Rec};
+
+send({_,_} = From, Rec, add) ->
+ gen_server:reply(From, [Rec]).
+
+%% down/2
+
+down(Pid, #state{monitors = MS} = S) ->
+ NS = flush(Pid, S),
+ Recvs = delete(match('_', Pid), NS),
+ ets:match_delete(?TABLE, {'_', Pid}),
+ notify(Recvs, remove),
+ NS#state{monitors = sets:del_element(Pid, MS)}.
+
+%% flush/3
%% Remove any processes that are dead but for which we may not have
-%% received 'DOWN' yet. This is to ensure that add_new can be used
-%% to register a unique name each time a process restarts.
-flush(List) ->
- lists:foreach(fun({_,P} = T) ->
- del(erlang:is_process_alive(P), T)
- end,
- List).
-
-del(Alive, T) ->
- Alive orelse ets:delete_object(?TABLE, T).
-
-%% repl/3
-
-repl([?MAPPING(_, Pid) = M], Key, Pid) ->
- ets:delete_object(?TABLE, M),
- true = ets:insert(?TABLE, ?MAPPING(Key, Pid));
-repl([], _, _) ->
- false.
-
-%% pending/1
-
-pending(true, #state{q = [_|_] = Q} = S) ->
- S#state{q = q(lists:reverse(Q), [])}; %% retain reply order
-pending(_, S) ->
+%% received 'DOWN' yet, to ensure that add_new can be used to register
+%% a unique name each time a registering process restarts.
+flush(true, {Key, Pid}, S) ->
+ Spec = [{{'$1', '$2'},
+ [{'andalso', {'==', '$1', {const, Key}},
+ {'/=', '$2', Pid}}],
+ ['$2']}],
+ lists:foldl(fun down/2, S, [P || P <- ets:select(?TABLE, Spec),
+ not is_process_alive(P)]);
+
+flush(false, _, S) ->
S.
-q([], Q) ->
- Q;
-q([{From, Pat} = T | Rest], Q) ->
- case find(Pat) of
- {ok, L} ->
- gen_server:reply(From, L),
- q(Rest, Q);
- false ->
- q(Rest, [T|Q])
- end.
-
-%% find/1
-
-find(Pat) ->
- try match(Pat) of
- [] ->
- false;
- L ->
- {ok, L}
- catch
- _:_ ->
- {ok, []}
- end.
+%% flush/2
+
+%% Process has died and should no longer receive messages/replies.
+flush(Pid, #state{receivers = RD} = S)
+ when is_pid(Pid) ->
+ S#state{receivers = dict:fold(fun(Pt,Ps,D) -> flush(Pid, Pt, Ps, D) end,
+ RD,
+ RD)}.
+
+%% flush/4
+
+flush(Pid, Pat, Recvs, Dict) ->
+ remove(fun(T) -> Pid /= head(T) end, Pat, Recvs, Dict).
+
+%% head/1
+
+head([P|_]) ->
+ P;
+
+head({P,_}) ->
+ P.
+
+%% remove/4
+
+remove(Pred, Key, Values, Dict) ->
+ case lists:filter(Pred, Values) of
+ [] ->
+ dict:erase(Key, Dict);
+ Rest ->
+ dict:store(Key, Rest, Dict)
+ end.
%% call/1
diff --git a/lib/diameter/src/base/diameter_service.erl b/lib/diameter/src/base/diameter_service.erl
index cfb5cb5b82..ccf68f4d93 100644
--- a/lib/diameter/src/base/diameter_service.erl
+++ b/lib/diameter/src/base/diameter_service.erl
@@ -136,7 +136,7 @@
state = ?WD_INITIAL :: match(wd_state()),
started = diameter_lib:now(),%% at process start
peer = false :: match(boolean() | pid())}).
- %% true at accepted, pid() at okay/reopen
+ %% true at accepted/remove, pid() at okay/reopen
%% Record representing a Peer State Machine processes implemented by
%% diameter_peer_fsm.
@@ -250,7 +250,7 @@ subscribe(SvcName) ->
diameter_reg:add({?MODULE, subscriber, SvcName}).
unsubscribe(SvcName) ->
- diameter_reg:del({?MODULE, subscriber, SvcName}).
+ diameter_reg:remove({?MODULE, subscriber, SvcName}).
subscriptions(Pat) ->
pmap(diameter_reg:match({?MODULE, subscriber, Pat})).
@@ -676,25 +676,34 @@ mod_state(Alias, ModS) ->
%% remove_transport
shutdown(Refs, #state{watchdogT = WatchdogT})
when is_list(Refs) ->
- ets:foldl(fun(P,ok) -> st(P, Refs), ok end, ok, WatchdogT);
+ ets:insert(WatchdogT, ets:foldl(fun(R,A) -> st(R, Refs, A) end,
+ [],
+ WatchdogT));
%% application/service shutdown
shutdown(Reason, #state{watchdogT = WatchdogT})
when Reason == application;
Reason == service ->
- diameter_lib:wait(ets:foldl(fun(P,A) -> st(P, Reason, A) end,
+ diameter_lib:wait(ets:foldl(fun(P,A) -> ss(P, Reason, A) end,
[],
WatchdogT)).
-%% st/2
+%% st/3
-st(#watchdog{ref = Ref, pid = Pid}, Refs) ->
- lists:member(Ref, Refs)
- andalso (Pid ! {shutdown, self(), transport}). %% 'DOWN' cleans up
+%% Mark replacement as started so that a subsequent accept doesn't
+%% result in a new process that isn't terminated.
+st(#watchdog{ref = Ref, pid = Pid, peer = P} = Rec, Refs, Acc) ->
+ case lists:member(Ref, Refs) of
+ true ->
+ Pid ! {shutdown, self(), transport}, %% 'DOWN' cleans up
+ [Rec#watchdog{peer = true} || P == false] ++ Acc;
+ false ->
+ Acc
+ end.
-%% st/3
+%% ss/3
-st(#watchdog{pid = Pid}, Reason, Acc) ->
+ss(#watchdog{pid = Pid}, Reason, Acc) ->
MRef = monitor(process, Pid),
Pid ! {shutdown, self(), Reason},
[MRef | Acc].
@@ -974,11 +983,22 @@ ms(_, Svc) ->
%% ---------------------------------------------------------------------------
accepted(Pid, _TPid, #state{watchdogT = WatchdogT} = S) ->
- #watchdog{ref = Ref, type = accept = T, peer = false, options = Opts}
+ #watchdog{type = accept = T, peer = P}
= Wd
= fetch(WatchdogT, Pid),
- ets:insert(WatchdogT, Wd#watchdog{peer = true}),%% mark replacement started
- start(Ref, T, Opts, S). %% start new watchdog
+ if not P ->
+ #watchdog{ref = Ref, options = Opts} = Wd,
+ %% Mark replacement started, and start new watchdog.
+ ets:insert(WatchdogT, Wd#watchdog{peer = true}),
+ start(Ref, T, Opts, S);
+ P ->
+ %% Transport removal in progress: true has been set in
+ %% shutdown/2, and the transport will die as a
+ %% consequence.
+ ok
+ end.
+
+%% fetch/2
fetch(Tid, Key) ->
[T] = ets:lookup(Tid, Key),
@@ -1317,8 +1337,7 @@ start_tc(Tc, T, _) ->
tc_timeout({Ref, _Type, _Opts} = T, #state{service_name = SvcName} = S) ->
tc(diameter_config:have_transport(SvcName, Ref), T, S).
-tc(true, {Ref, Type, Opts}, #state{service_name = SvcName}
- = S) ->
+tc(true, {Ref, Type, Opts}, #state{service_name = SvcName} = S) ->
send_event(SvcName, {reconnect, Ref, Opts}),
start(Ref, Type, Opts, S);
tc(false = No, _, _) -> %% removed
diff --git a/lib/diameter/src/base/diameter_sup.erl b/lib/diameter/src/base/diameter_sup.erl
index e89ede9843..482289cb9a 100644
--- a/lib/diameter/src/base/diameter_sup.erl
+++ b/lib/diameter/src/base/diameter_sup.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -34,6 +34,7 @@
-export([init/1]).
-define(CHILDREN, [diameter_misc_sup,
+ diameter_config_sup,
diameter_watchdog_sup,
diameter_peer_fsm_sup,
diameter_transport_sup,
diff --git a/lib/diameter/src/modules.mk b/lib/diameter/src/modules.mk
index 3b223ea391..4e4ce60ddf 100644
--- a/lib/diameter/src/modules.mk
+++ b/lib/diameter/src/modules.mk
@@ -1,7 +1,7 @@
# %CopyrightBegin%
#
-# Copyright Ericsson AB 2010-2015. All Rights Reserved.
+# Copyright Ericsson AB 2010-2016. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
@@ -37,6 +37,7 @@ RT_MODULES = \
base/diameter_callback \
base/diameter_capx \
base/diameter_config \
+ base/diameter_config_sup \
base/diameter_codec \
base/diameter_dict \
base/diameter_lib \
diff --git a/lib/diameter/src/transport/diameter_sctp.erl b/lib/diameter/src/transport/diameter_sctp.erl
index 8a80ce630a..4a005b853d 100644
--- a/lib/diameter/src/transport/diameter_sctp.erl
+++ b/lib/diameter/src/transport/diameter_sctp.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2010-2015. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -61,10 +61,6 @@
%% Remote addresses to accept connections from.
-define(DEFAULT_ACCEPT, []). %% any
-%% How long a listener with no associations lives before offing
-%% itself.
--define(LISTENER_TIMEOUT, 30000).
-
%% How long to wait for a transport process to attach after
%% association establishment.
-define(ACCEPT_TIMEOUT, 5000).
@@ -104,7 +100,6 @@
socket :: gen_sctp:sctp_socket(),
count = 0 :: uint(), %% attached transport processes
pending = {0, queue:new()},
- tref :: reference() | undefined,
accept :: [match()]}).
%% Field pending implements two queues: the first of transport-to-be
%% processes to which an association has been assigned but for which
@@ -216,14 +211,15 @@ init(T) ->
%% A process owning a listening socket.
i({listen, Ref, {Opts, Addrs}}) ->
+ [_] = diameter_config:subscribe(Ref, transport), %% assert existence
{[Matches], Rest} = proplists:split(Opts, [accept]),
{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}),
- start_timer(#listener{ref = Ref,
- socket = Sock,
- accept = [[M] || {accept, M} <- Matches]});
+ #listener{ref = Ref,
+ socket = Sock,
+ accept = [[M] || {accept, M} <- Matches]};
%% A connecting transport.
i({connect, Pid, Opts, Addrs, Ref}) ->
@@ -431,13 +427,6 @@ putr(Key, Val) ->
getr(Key) ->
get({?MODULE, Key}).
-%% start_timer/1
-
-start_timer(#listener{count = 0} = S) ->
- S#listener{tref = erlang:start_timer(?LISTENER_TIMEOUT, self(), close)};
-start_timer(S) ->
- S.
-
%% l/2
%%
%% Transition listener state.
@@ -455,12 +444,10 @@ l({sctp, Sock, _RA, _RP, Data} = T, #listener{socket = Sock,
l({'DOWN', _MRef, process, TPid, _}, #listener{pending = {_,Q}} = S) ->
down(queue:member(TPid, Q), TPid, S);
-%% Timeout after the last accepting process has died.
-l({timeout, TRef, close = T}, #listener{tref = TRef,
- count = 0}) ->
- x(T);
-l({timeout, _, close}, #listener{} = S) ->
- S.
+%% Transport has been removed.
+l({transport, remove, _} = T, #listener{socket = Sock}) ->
+ gen_sctp:close(Sock),
+ x(T).
%% down/3
%%
@@ -472,15 +459,15 @@ down(true, TPid, #listener{pending = {N,Q},
= S) ->
NQ = queue:filter(fun(P) -> P /= TPid end, Q),
if N < 0 -> %% awaiting an association ...
- start_timer(S#listener{count = K-1,
- pending = {N+1, NQ}});
+ S#listener{count = K-1,
+ pending = {N+1, NQ}};
true -> %% ... or one has been assigned
S#listener{pending = {N-1, NQ}}
end;
%% ... or one that's already attached.
down(false, _TPid, #listener{count = K} = S) ->
- start_timer(S#listener{count = K-1}).
+ S#listener{count = K-1}.
%% t/2
%%
diff --git a/lib/diameter/src/transport/diameter_tcp.erl b/lib/diameter/src/transport/diameter_tcp.erl
index 6a5e5fe89d..546c2cfa5e 100644
--- a/lib/diameter/src/transport/diameter_tcp.erl
+++ b/lib/diameter/src/transport/diameter_tcp.erl
@@ -57,7 +57,6 @@
-define(ERROR(T), erlang:error({T, ?MODULE, ?LINE})).
-define(DEFAULT_PORT, 3868). %% RFC 3588, ch 2.1
--define(LISTENER_TIMEOUT, 30000).
-define(DEFAULT_FRAGMENT_TIMEOUT, 1000).
-define(IS_UINT32(N), (is_integer(N) andalso 0 =< N andalso 0 == N bsr 32)).
@@ -73,8 +72,10 @@
%% Listener process state.
-record(listener, {socket :: inet:socket(),
- count = 1 :: non_neg_integer(),
- tref :: reference() | undefined}).
+ count = 1 :: non_neg_integer()}). %% accepting processes
+%% The count of accepting processes was previously used to terminate
+%% the listening process, but diameter_reg:subscribe/2 is now used for
+%% this. Leave the the count for trace purposes.
%% Monitor process state.
-record(monitor,
@@ -240,6 +241,7 @@ i(#monitor{parent = Pid, transport = TPid} = S) ->
%% gen_tcp seems to so. Links should be left to supervisors.
i({listen, LRef, APid, {Mod, Opts, Addrs}}) ->
+ [_] = diameter_config:subscribe(LRef, transport), %% assert existence
{[LA, LP], Rest} = proplists:split(Opts, [ip, port]),
LAddrOpt = get_addr(LA, Addrs),
LPort = get_port(LP),
@@ -248,7 +250,7 @@ i({listen, LRef, APid, {Mod, Opts, Addrs}}) ->
true = diameter_reg:add_new({?MODULE, listener, {LRef, {LAddr, LSock}}}),
proc_lib:init_ack({ok, self(), {LAddr, LSock}}),
monitor(process, APid),
- start_timer(#listener{socket = LSock}).
+ #listener{socket = LSock}.
laddr([], Mod, Sock) ->
{ok, {Addr, _Port}} = sockname(Mod, Sock),
@@ -484,13 +486,6 @@ putr(Key, Val) ->
getr(Key) ->
get({?MODULE, Key}).
-%% start_timer/1
-
-start_timer(#listener{count = 0} = S) ->
- S#listener{tref = erlang:start_timer(?LISTENER_TIMEOUT, self(), close)};
-start_timer(S) ->
- S.
-
%% m/2
%%
%% Transition monitor state.
@@ -512,21 +507,19 @@ m({'DOWN', _, process, Pid, _}, #monitor{parent = Pid,
%%
%% Transition listener state.
-%% Another accept transport is attaching.
+%% An accepting transport is attaching.
l({accept, TPid}, #listener{count = N} = S) ->
monitor(process, TPid),
S#listener{count = N+1};
%% Accepting process has died.
l({'DOWN', _, process, _, _}, #listener{count = N} = S) ->
- start_timer(S#listener{count = N-1});
+ S#listener{count = N-1};
-%% Timeout after the last accepting process has died.
-l({timeout, TRef, close = T}, #listener{tref = TRef,
- count = 0}) ->
- x(T);
-l({timeout, _, close}, #listener{} = S) ->
- S.
+%% Transport has been removed.
+l({transport, remove, _} = T, #listener{socket = Sock}) ->
+ gen_tcp:close(Sock),
+ x(T).
%% t/2
%%