1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2010-2015. 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%
%%
%%
%% 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
|
