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
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
%%%----------------------------------------------------------------------
%%% File : mod_jidprep.erl
%%% Author : Holger Weiss <holger@zedat.fu-berlin.de>
%%% Purpose : JID Prep (XEP-0328)
%%% Created : 11 Sep 2019 by Holger Weiss <holger@zedat.fu-berlin.de>
%%%
%%%
%%% ejabberd, Copyright (C) 2019-2021 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License along
%%% with this program; if not, write to the Free Software Foundation, Inc.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(mod_jidprep).
-author('holger@zedat.fu-berlin.de').
-protocol({xep, 328, '0.1'}).
-behaviour(gen_mod).
%% gen_mod callbacks.
-export([start/2, stop/1, reload/3, mod_opt_type/1, mod_options/1, depends/2]).
-export([mod_doc/0]).
%% ejabberd_hooks callbacks.
-export([disco_local_features/5]).
%% gen_iq_handler callback.
-export([process_iq/1]).
-include("logger.hrl").
-include("translate.hrl").
-include_lib("xmpp/include/xmpp.hrl").
%%--------------------------------------------------------------------
%% gen_mod callbacks.
%%--------------------------------------------------------------------
-spec start(binary(), gen_mod:opts()) -> ok.
start(Host, _Opts) ->
register_iq_handlers(Host),
register_hooks(Host).
-spec stop(binary()) -> ok.
stop(Host) ->
unregister_hooks(Host),
unregister_iq_handlers(Host).
-spec reload(binary(), gen_mod:opts(), gen_mod:opts()) -> ok.
reload(_Host, _NewOpts, _OldOpts) ->
ok.
-spec depends(binary(), gen_mod:opts()) -> [{module(), hard | soft}].
depends(_Host, _Opts) ->
[].
-spec mod_opt_type(atom()) -> econf:validator().
mod_opt_type(access) ->
econf:acl().
-spec mod_options(binary()) -> [{atom(), any()}].
mod_options(_Host) ->
[{access, local}].
mod_doc() ->
#{desc =>
?T("This module allows XMPP clients to ask the "
"server to normalize a JID as per the rules specified "
"in https://tools.ietf.org/html/rfc6122"
"[RFC 6122: XMPP Address Format]. This might be useful "
"for clients in certain constrained environments, "
"or for testing purposes."),
opts =>
[{access,
#{value => ?T("AccessName"),
desc =>
?T("This option defines which access rule will "
"be used to control who is allowed to use this "
"service. The default value is 'local'.")}}]}.
%%--------------------------------------------------------------------
%% Register/unregister hooks.
%%--------------------------------------------------------------------
-spec register_hooks(binary()) -> ok.
register_hooks(Host) ->
ejabberd_hooks:add(disco_local_features, Host, ?MODULE,
disco_local_features, 50).
-spec unregister_hooks(binary()) -> ok.
unregister_hooks(Host) ->
ejabberd_hooks:delete(disco_local_features, Host, ?MODULE,
disco_local_features, 50).
%%--------------------------------------------------------------------
%% Service discovery.
%%--------------------------------------------------------------------
-spec disco_local_features(mod_disco:features_acc(), jid(), jid(), binary(),
binary()) -> mod_disco:features_acc().
disco_local_features(empty, From, To, Node, Lang) ->
disco_local_features({result, []}, From, To, Node, Lang);
disco_local_features({result, OtherFeatures} = Acc, From,
#jid{lserver = LServer}, <<"">>, _Lang) ->
Access = mod_jidprep_opt:access(LServer),
case acl:match_rule(LServer, Access, From) of
allow ->
{result, [?NS_JIDPREP_0 | OtherFeatures]};
deny ->
Acc
end;
disco_local_features(Acc, _From, _To, _Node, _Lang) ->
Acc.
%%--------------------------------------------------------------------
%% IQ handlers.
%%--------------------------------------------------------------------
-spec register_iq_handlers(binary()) -> ok.
register_iq_handlers(Host) ->
gen_iq_handler:add_iq_handler(ejabberd_local, Host,
?NS_JIDPREP_0, ?MODULE, process_iq).
-spec unregister_iq_handlers(binary()) -> ok.
unregister_iq_handlers(Host) ->
gen_iq_handler:remove_iq_handler(ejabberd_local, Host, ?NS_JIDPREP_0).
-spec process_iq(iq()) -> iq().
process_iq(#iq{type = set, lang = Lang} = IQ) ->
Txt = ?T("Value 'set' of 'type' attribute is not allowed"),
xmpp:make_error(IQ, xmpp:err_not_allowed(Txt, Lang));
process_iq(#iq{from = From, to = #jid{lserver = LServer}, lang = Lang,
sub_els = [#jidprep{jid = #jid{luser = U,
lserver = S,
lresource = R} = JID}]} = IQ) ->
Access = mod_jidprep_opt:access(LServer),
case acl:match_rule(LServer, Access, From) of
allow ->
case jid:make(U, S, R) of
#jid{} = Normalized ->
?DEBUG("Normalized JID for ~ts: ~ts",
[jid:encode(From), jid:encode(JID)]),
xmpp:make_iq_result(IQ, #jidprep{jid = Normalized});
error -> % Cannot happen.
?DEBUG("Normalizing JID failed for ~ts: ~ts",
[jid:encode(From), jid:encode(JID)]),
Txt = ?T("JID normalization failed"),
xmpp:make_error(IQ, xmpp:err_jid_malformed(Txt, Lang))
end;
deny ->
?DEBUG("Won't return normalized JID to ~ts: ~ts",
[jid:encode(From), jid:encode(JID)]),
Txt = ?T("JID normalization denied by service policy"),
xmpp:make_error(IQ, xmpp:err_forbidden(Txt, Lang))
end;
process_iq(#iq{lang = Lang} = IQ) ->
Txt = ?T("No module is handling this query"),
xmpp:make_error(IQ, xmpp:err_service_unavailable(Txt, Lang)).
|
