From 3c15ff32e89e401b4dde2b8acc9699be2614b996 Mon Sep 17 00:00:00 2001
From: Anders Svensson <anders@erlang.org>
Date: Wed, 18 May 2011 18:29:12 +0200
Subject: Initial commit of the diameter application.

The application provides an implementation of the Diameter protocol
as defined in RFC 3588.
---
 lib/diameter/examples/client.erl | 125 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 lib/diameter/examples/client.erl

(limited to 'lib/diameter/examples/client.erl')

diff --git a/lib/diameter/examples/client.erl b/lib/diameter/examples/client.erl
new file mode 100644
index 0000000000..36a77dd524
--- /dev/null
+++ b/lib/diameter/examples/client.erl
@@ -0,0 +1,125 @@
+%%
+%% %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 client that can sends base protocol RAR
+%% requests to a connected peer.
+%%
+%% The simplest usage is as follows this to connect to a server
+%% listening on the default port on the local host, assuming diameter
+%% is already started (eg. diameter:start()).
+%%
+%%   client:start().
+%%   client:connect(tcp).
+%%   client:call().
+%%
+%% The first call starts the a service with the default name of
+%% ?MODULE, the second defines a connecting transport that results in
+%% a connection to the peer (if it's listening), the third sends it a
+%% RAR and returns the answer.
+%%
+
+-module(client).
+
+-include_lib("diameter/include/diameter.hrl").
+-include_lib("diameter/src/app/diameter_gen_base_rfc3588.hrl").
+
+-export([start/1,     %% start a service
+         connect/2,   %% add a connecting transport
+         call/1,      %% send using the record encoding
+         cast/1,      %% send using the list encoding and detached
+         stop/1]).    %% stop a service
+%% A real application would typically choose an encoding and whether
+%% they want the call to return the answer or not. Sending with
+%% both the record and list encoding here, one detached and one not,
+%% is just for demonstration purposes.
+
+%% Convenience functions using the default service name, ?SVC_NAME.
+-export([start/0,
+         connect/1,
+         stop/0,
+         call/0,
+         cast/0]).
+
+-define(SVC_NAME,     ?MODULE).
+-define(APP_ALIAS,    ?MODULE).
+-define(CALLBACK_MOD, client_cb).
+
+-define(L, atom_to_list).
+
+%% The service configuration. As in the server example, a client
+%% supporting multiple Diameter applications may or may not want to
+%% configure a common callback module on all applications.
+-define(SERVICE(Name), [{'Origin-Host', ?L(Name) ++ ".example.com"},
+                        {'Origin-Realm', "example.com"},
+                        {'Vendor-Id', 0},
+                        {'Product-Name', "Client"},
+                        {'Auth-Application-Id', [?DIAMETER_APP_ID_COMMON]},
+                        {application, [{alias, ?APP_ALIAS},
+                                       {dictionary, ?DIAMETER_DICT_COMMON},
+                                       {module, ?CALLBACK_MOD}]}]).
+
+%% start/1
+
+start(Name)
+  when is_atom(Name) ->
+    peer:start(Name, ?SERVICE(Name)).
+
+start() ->
+    start(?SVC_NAME).
+
+%% connect/2
+
+connect(Name, T) ->
+    peer:connect(Name, T).
+
+connect(T) ->
+    connect(?SVC_NAME, T).
+
+%% call/1
+
+call(Name) ->
+    SId = diameter:session_id(?L(Name)),
+    RAR = #diameter_base_RAR{'Session-Id' = SId,
+                             'Auth-Application-Id' = 0,
+                             'Re-Auth-Request-Type' = 0},
+    diameter:call(Name, ?APP_ALIAS, RAR, []).
+
+call() ->
+    call(?SVC_NAME).
+
+%% cast/1
+
+cast(Name) ->
+    SId = diameter:session_id(?L(Name)),
+    RAR = ['RAR', {'Session-Id', SId},
+                  {'Auth-Application-Id', 0},
+                  {'Re-Auth-Request-Type', 1}],
+    diameter:call(Name, ?APP_ALIAS, RAR, [detach]).
+    
+cast() ->
+    cast(?SVC_NAME).
+
+%% stop/1
+
+stop(Name) ->
+    peer:stop(Name).
+
+stop() ->
+    stop(?SVC_NAME).
-- 
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