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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2010-2011. 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%
+%%
+
+%%
+%% An example Diameter relay agent.
+%%
+%% Usage to connect to a server listening on the default port over TCP
+%% and to listen on the default port over SCTP is as follows, assuming
+%% diameter is already started (eg. diameter:start()).
+%%
+%% Eg. relay:start().
+%% relay:connect(tcp).
+%% relay:listen(sctp).
+%%
+
+-module(relay).
+
+-include_lib("diameter/include/diameter.hrl").
+-include_lib("diameter/src/app/diameter_gen_base_rfc3588.hrl").
+
+-export([start/1,
+ listen/2,
+ connect/2,
+ stop/1]).
+
+-export([start/0,
+ listen/1,
+ connect/1,
+ stop/0]).
+
+-define(APP_ALIAS, ?MODULE).
+-define(SVC_NAME, ?MODULE).
+-define(CALLBACK_MOD, relay_cb).
+
+%% The service configuration.
+-define(SERVICE(Name), [{'Origin-Host', atom_to_list(Name) ++ ".example.com"},
+ {'Origin-Realm', "example.com"},
+ {'Vendor-Id', 193},
+ {'Product-Name', "RelayAgent"},
+ {'Auth-Application-Id', [?DIAMETER_APP_ID_RELAY]},
+ {application, [{alias, ?MODULE},
+ {dictionary, ?DIAMETER_DICT_RELAY},
+ {module, ?CALLBACK_MOD}]}]).
+
+%% start/1
+
+start(Name)
+ when is_atom(Name) ->
+ peer:start(Name, ?SERVICE(Name)).
+
+start() ->
+ start(?SVC_NAME).
+
+%% listen/2
+
+listen(Name, T) ->
+ peer:listen(Name, T).
+
+listen(T) ->
+ listen(?SVC_NAME, T).
+
+%% connect/2
+
+connect(Name, T) ->
+ peer:connect(Name, T).
+
+connect(T) ->
+ connect(?SVC_NAME, T).
+
+%% stop/1
+
+stop(Name) ->
+ peer:stop(Name).
+
+stop() ->
+ stop(?SVC_NAME).