%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010-2015. 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.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%
%% The diameter application callback module configured by server.erl.
%%
-module(server_cb).
-include_lib("diameter/include/diameter.hrl").
-include_lib("diameter/include/diameter_gen_base_rfc6733.hrl").
%% diameter callbacks
-export([peer_up/3,
peer_down/3,
pick_peer/4,
prepare_request/3,
prepare_retransmit/3,
handle_answer/4,
handle_error/4,
handle_request/3]).
-define(UNEXPECTED, erlang:error({unexpected, ?MODULE, ?LINE})).
peer_up(_SvcName, _Peer, State) ->
State.
peer_down(_SvcName, _Peer, State) ->
State.
pick_peer(_, _, _SvcName, _State) ->
?UNEXPECTED.
prepare_request(_, _SvcName, _Peer) ->
?UNEXPECTED.
prepare_retransmit(_Packet, _SvcName, _Peer) ->
?UNEXPECTED.
handle_answer(_Packet, _Request, _SvcName, _Peer) ->
?UNEXPECTED.
handle_error(_Reason, _Request, _SvcName, _Peer) ->
?UNEXPECTED.
%% A request whose decode was successful ...
handle_request(#diameter_packet{msg = Req, errors = []}, _SvcName, {_, Caps})
when is_record(Req, diameter_base_RAR) ->
#diameter_caps{origin_host = {OH,_},
origin_realm = {OR,_}}
= Caps,
#diameter_base_RAR{'Session-Id' = Id,
'Re-Auth-Request-Type' = Type}
= Req,
{reply, #diameter_base_RAA{'Result-Code' = rc(Type),
'Origin-Host' = OH,
'Origin-Realm' = OR,
'Session-Id' = Id}};
%% ... or one that wasn't. 3xxx errors are answered by diameter itself
%% but these are 5xxx errors for which we must contruct a reply.
%% diameter will set Result-Code and Failed-AVP's.
handle_request(#diameter_packet{msg = Req}, _SvcName, {_, Caps})
when is_record(Req, diameter_base_RAR) ->
#diameter_caps{origin_host = {OH,_},
origin_realm = {OR,_}}
= Caps,
#diameter_base_RAR{'Session-Id' = Id}
= Req,
{reply, #diameter_base_RAA{'Origin-Host' = OH,
'Origin-Realm' = OR,
'Session-Id' = Id}};
%% Answer that any other message is unsupported.
handle_request(#diameter_packet{}, _SvcName, _) ->
{answer_message, 3001}. %% DIAMETER_COMMAND_UNSUPPORTED
%% Map Re-Auth-Request-Type to Result-Code just for the purpose of
%% generating different answers.
rc(0) ->
2001; %% DIAMETER_SUCCESS
rc(_) ->
5012. %% DIAMETER_UNABLE_TO_COMPLY
