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%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2013-2015. 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%
%%

%%
%% Test service and transport config. In particular, of the detection
%% of config errors.
%%

-module(diameter_config_SUITE).

-export([suite/0,
         all/0]).

%% testcases
-export([start/1,
         start_service/1,
         add_transport/1,
         stop/1]).

-define(util, diameter_util).

%% Lists of {Key, GoodConfigList, BadConfigList} with which to
%% configure.

-define(SERVICE_CONFIG,
        [{application,
          [[[{dictionary, diameter_gen_base_rfc6733},
             {module, ?MODULE}]]
           | [[[{dictionary, D},
                {module, M},
                {alias, A},
                {state, S},
                {answer_errors, AE},
                {request_errors, RE},
                {call_mutates_state, C}]]
              || D <- [diameter_gen_base_rfc3588, diameter_gen_base_rfc6733],
                 M <- [?MODULE, [?MODULE, now()]],
                 A <- [0, common, make_ref()],
                 S <- [[], make_ref()],
                 AE <- [report, callback, discard],
                 RE <- [answer_3xxx, answer, callback],
                 C <- [true, false]]],
          [[x],
           [[]],
           [[{dictionary, diameter_gen_base_rfc3588}]],
           [[{module, ?MODULE}]]
           | [[[{dictionary, diameter_gen_base_rfc6733},
                {module, ?MODULE},
                {K,x}]]
              || K <- [answer_errors,
                       request_errors,
                       call_mutates_state]]]},
         {restrict_connections,
          [[false], [node], [nodes], [[node(), node()]]],
          []},
         {sequence,
          [[{0,32}], [{1,31}]],
          [[{2,31}]]},
         {share_peers,
          [[true],
           [false],
           [[node()]]],
          [[x]]},
         {use_shared_peers,
          [[true],
           [false],
           [[node(), node()]]],
          [[x]]},
         {string_decode,
          [[true], [false]],
          [[0], [x]]},
         {spawn_opt,
          [[[]], [[monitor, link]]],
          [[false]]},
         {invalid_option,  %% invalid service options are rejected
          [],
          [[x],
           [x,x]]}]).

-define(TRANSPORT_CONFIG,
        [{transport_module,
          [[?MODULE]],
          [[[?MODULE]]]},
         {transport_config,
          [[{}, 3000],
           [{}, infinity]],
          [[{}, x]]},
         {applications,
          [[[1, a, [x]]]],
          [[x]]},
         {capabilities,
          [[[{'Origin-Host', "diameter.erlang.org"}]],
           [[{'Origin-Realm', "erlang.org"}]]]
          ++ [[[{'Host-IP-Address', L}]]
              || L <- [[{127,0,0,1}],
                       ["127.0.0.1"],
                       ["127.0.0.1", "FFFF::1", "::1", {1,2,3,4,5,6,7,8}]]]
          ++ [[[{'Product-Name', N}]]
              || N <- [["Product", $-, ["Name"]],
                       "Norðurálfa",
                       "ᚠᚢᚦᚨᚱᚲ"]]
          ++ [[[{K,V}]]
              || K <- ['Vendor-Id',
                       'Origin-State-Id',
                       'Firmware-Revision'],
                 V <- [0, 256, 16#FFFF]]
          ++ [[[{K,V}]]
              || K <- ['Supported-Vendor-Id',
                       'Auth-Application-Id',
                       'Acct-Application-Id',
                       'Inband-Security-Id'],
                 V <- [[17], [0, 256, 16#FFFF]]]
          ++ [[[{'Vendor-Specific-Application-Id',
                 [[{'Vendor-Id', V},
                   {'Auth-Application-Id', [0]},
                   {'Acct-Application-Id', [4]}]]}]]
              || V <- [1, [1]]],
          [[x], [[{'Origin-Host', "ᚠᚢᚦᚨᚱᚲ"}]]]
          ++ [[[{'Host-IP-Address', A}]]
              || A <- [{127,0,0,1}]]
          ++ [[[{'Product-Name', N}]]
              || N <- [x, 1]]
          ++ [[[{K,V}]]
              || K <- ['Vendor-Id',
                       'Origin-State-Id',
                       'Firmware-Revision'],
                 V <- [x, [0], -1, 1 bsl 32]]
          ++ [[[{K,V}]]
              || K <- ['Supported-Vendor-Id',
                       'Auth-Application-Id',
                       'Acct-Application-Id',
                       'Inband-Security-Id'],
                 V <- [x, 17, [-1], [1 bsl 32]]]
          ++ [[[{'Vendor-Specific-Application-Id', V}]]
              || V <- [x,
                       [[{'Vendor-Id', 1 bsl 32}]],
                       [[{'Auth-Application-Id', 1}]]]]},
         {capabilities_cb,
          [[x]],
          []},
         {capx_timeout,
          [[3000]],
          [[{?MODULE, tmo, []}]]},
         {disconnect_cb,
          [[x]],
          []},
         {length_errors,
          [[exit], [handle], [discard]],
          [[x]]},
         {dpr_timeout,
          [[0], [3000], [16#FFFFFFFF]],
          [[infinity], [-1], [1 bsl 32], [x]]},
         {dpa_timeout,
          [[0], [3000], [16#FFFFFFFF]],
          [[infinity], [-1], [1 bsl 32], [x]]},
         {connect_timer,
          [[3000]],
          [[infinity]]},
         {watchdog_timer,
          [[3000],
           [{?MODULE, tmo, []}]],
          [[infinity],
           [-1]]},
         {watchdog_config,
          [[[{okay, 0}, {suspect, 0}]],
           [[{okay, 1}]],
           [[{suspect, 2}]]],
          [[x],
           [[{open, 0}]]]},
         {pool_size,
          [[1], [100]],
          [[0], [infinity], [-1], [x]]},
         {private,
          [[x]],
          []},
         {spawn_opt,
          [[[]], [[monitor, link]]],
          [[false]]},
         {invalid_option,  %% invalid transport options are silently ignored
          [[x],
           [x,x]],
          []}]).

%% ===========================================================================

suite() ->
    [{timetrap, {seconds, 60}}].

all() ->
    [start,
     start_service,
     add_transport,
     stop].

%% ===========================================================================

start(_) ->
    ok = diameter:start().

start_service(T)
  when is_tuple(T) ->
    do(fun start/3, T);

start_service(_) ->
    [] = ?util:run([{?MODULE, start_service, [T]}
                    || T <- [lists:keyfind(capabilities, 1, ?TRANSPORT_CONFIG)
                             | ?SERVICE_CONFIG]]).

add_transport(T)
  when is_tuple(T) ->
    do(fun add/3, T);

add_transport(_) ->
    [] = ?util:run([{?MODULE, add_transport, [T]}
                    || T <- ?TRANSPORT_CONFIG]).

stop(_) ->
    ok = diameter:stop().

%% ===========================================================================

%% do/2

do(F, {Key, Good, Bad}) ->
    F(Key, Good, Bad).

%% add/3

add(Key, Good, Bad) ->
    {[],[]} = {[{Vs,T} || Vs <- Good,
                          T <- [add(Key, Vs)],
                          [T] /= [T || {ok,_} <- [T]]],
               [{Vs,T} || Vs <- Bad,
                          T <- [add(Key, Vs)],
                          [T] /= [T || {error,_} <- [T]]]}.

add(Key, Vs) ->
    T = list_to_tuple([Key | Vs]),
    diameter:add_transport(make_ref(), {connect, [T]}).

%% start/3

start(Key, Good, Bad) ->
    {[],[]} = {[{Vs,T} || Vs <- Good,
                          T <- [start(Key, Vs)],
                          T /= ok],
               [{Vs,T} || Vs <- Bad,
                          T <- [start(Key, Vs)],
                          [T] /= [T || {error,_} <- [T]]]}.

start(capabilities = K, [Vs]) ->
    if is_list(Vs) ->
            start(make_ref(), Vs ++ apps(K));
       true ->
            {error, Vs}
    end;

start(Key, Vs)
  when is_atom(Key) ->
    start(make_ref(), [list_to_tuple([Key | Vs]) | apps(Key)]);

start(SvcName, Opts) ->
    try
        diameter:start_service(SvcName, Opts)
    after
        diameter:stop_service(SvcName)
    end.

apps(application) ->
    [];
apps(_) ->
    [{application, [{dictionary, diameter_gen_base_rfc6733},
                    {module, ?MODULE}]}].