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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
%%%----------------------------------------------------------------------
%%% File : mod_proxy65_service.erl
%%% Author : Evgeniy Khramtsov <xram@jabber.ru>
%%% Purpose : SOCKS5 Bytestreams XMPP service.
%%% Created : 12 Oct 2006 by Evgeniy Khramtsov <xram@jabber.ru>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(mod_proxy65_service).
-author('xram@jabber.ru').
-behaviour(gen_server).
%% gen_server callbacks.
-export([init/1,
handle_info/2,
handle_call/3,
handle_cast/2,
terminate/2,
code_change/3
]).
%% API.
-export([start_link/2]).
-include("mod_proxy65.hrl").
-include("../ejabberd.hrl").
-include("../jlib.hrl").
-define(PROCNAME, ejabberd_mod_proxy65_service).
-record(state, {
myhost,
serverhost,
name,
stream_addr,
port,
http_port,
http_base_path,
acl
}).
%% Unused callbacks.
handle_cast(_Request, State) ->
{noreply, State}.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
handle_call(_Request, _From, State) ->
{reply, ok, State}.
%%----------------
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []).
init([Host, Opts]) ->
{IP, State} = parse_options(Host, Opts),
NewOpts = [Host, {ip, IP} | Opts],
ejabberd_listener:add_listener(State#state.port, mod_proxy65_stream, NewOpts),
ejabberd_router:register_route(State#state.myhost),
{ok, State}.
terminate(_Reason, #state{myhost=MyHost, port=Port}) ->
catch ejabberd_listener:delete_listener(Port),
ejabberd_router:unregister_route(MyHost),
ok.
handle_info({route, From, To, {xmlelement, "iq", _, _} = Packet}, State) ->
IQ = jlib:iq_query_info(Packet),
case catch process_iq(From, IQ, State) of
Result when is_record(Result, iq) ->
ejabberd_router:route(To, From, jlib:iq_to_xml(Result));
{'EXIT', Reason} ->
?ERROR_MSG("Error when processing IQ stanza: ~p", [Reason]),
Err = jlib:make_error_reply(Packet, ?ERR_INTERNAL_SERVER_ERROR),
ejabberd_router:route(To, From, Err);
_ ->
ok
end,
{noreply, State};
handle_info(_Info, State) ->
{noreply, State}.
%%%------------------------
%%% IQ Processing
%%%------------------------
%% disco#info request
process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_INFO} = IQ, #state{name=Name, http_port=HTTP_Port}) ->
io:format("~p~n", [IQ]),
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_DISCO_INFO}], iq_disco_info(Name, HTTP_Port)}]};
%% disco#items request
process_iq(_, #iq{type = get, xmlns = ?NS_DISCO_ITEMS} = IQ, _) ->
io:format("~p~n", [IQ]),
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_DISCO_ITEMS}], []}]};
%% vCard request
process_iq(_, #iq{type = get, xmlns = ?NS_VCARD, lang = Lang} = IQ, _) ->
IQ#iq{type = result, sub_el =
[{xmlelement, "vCard", [{"xmlns", ?NS_VCARD}], iq_vcard(Lang)}]};
%% bytestreams info request
process_iq(JID, #iq{type = get, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
#state{acl = ACL, stream_addr = StreamAddr, serverhost = ServerHost}) ->
io:format("~p~n", [IQ]),
case acl:match_rule(ServerHost, ACL, JID) of
allow ->
StreamHostEl = [{xmlelement, "streamhost", StreamAddr, []}],
IQ#iq{type = result, sub_el =
[{xmlelement, "query", [{"xmlns", ?NS_BYTESTREAMS}], StreamHostEl}]};
deny ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
end;
%% bytestream target fake connection (for later http connection)
process_iq(TargetJID, #iq{type = set, sub_el = SubEl, xmlns = ?NS_HTTP_BYTESTREAMS} = IQ,
#state{acl = _ACL, myhost = MyHost,
http_port=HTTP_Port, http_base_path=HTTP_Base_Path}) ->
% XXX TODO: acl
SID = xml:get_tag_attr_s("sid", SubEl),
case catch jlib:string_to_jid(xml:get_tag_attr_s("jid", SubEl)) of
InitiatorJID when is_record(InitiatorJID, jid), SID /= "",
length(SID) =< 128, TargetJID /= InitiatorJID ->
Target = jlib:jid_to_string(jlib:jid_tolower(TargetJID)),
Initiator = jlib:jid_to_string(jlib:jid_tolower(InitiatorJID)),
SHA1 = sha:sha(SID ++ Initiator ++ Target),
URL = "http://" ++ MyHost ++ ":"++HTTP_Port++ HTTP_Base_Path,
case catch mod_proxy65_sm:register_stream(SHA1, TargetJID, URL, MyHost, self()) of
{atomic, ok} ->
IQ#iq{type = result, sub_el =
[{xmlelement, "connected",
[{"xmlns", ?NS_HTTP_BYTESTREAMS}, {"jid", MyHost}], []}]};
_Reason ->
?ERROR_MSG("process IQ set ~p:~n~p~n", [?NS_HTTP_BYTESTREAMS, _Reason]),
IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
end;
_Reason ->
?ERROR_MSG("process IQ set ~p:~n~p~n", [?NS_HTTP_BYTESTREAMS, _Reason]),
IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}
end;
%% bytestream activation request
process_iq(InitiatorJID, #iq{type = set, sub_el = SubEl, xmlns = ?NS_BYTESTREAMS} = IQ,
#state{acl = ACL, serverhost = ServerHost, myhost = MyHost,
http_port=HTTP_Port, http_base_path=HTTP_Base_Path}) ->
case acl:match_rule(ServerHost, ACL, InitiatorJID) of
allow ->
ActivateEl = xml:get_path_s(SubEl, [{elem, "activate"}]),
SID = xml:get_tag_attr_s("sid", SubEl),
case catch jlib:string_to_jid(xml:get_tag_cdata(ActivateEl)) of
TargetJID when is_record(TargetJID, jid), SID /= "",
length(SID) =< 128, TargetJID /= InitiatorJID ->
Target = jlib:jid_to_string(jlib:jid_tolower(TargetJID)),
Initiator = jlib:jid_to_string(jlib:jid_tolower(InitiatorJID)),
SHA1 = sha:sha(SID ++ Initiator ++ Target),
{Module, Activated} =
case xml:get_path_s(SubEl, [{elem, "x"}]) of
{xmlelement, "x", [{"xmlns", ?NS_HTTP_BYTESTREAMS}], _} ->
{mod_proxy65_http,
[{xmlelement, "activated",
[{"xmlns", ?NS_HTTP_BYTESTREAMS},
{"url", "http://" ++ MyHost ++ ":"++HTTP_Port++
HTTP_Base_Path ++ ?DEFAULT_HTTP_UPLOAD_PATH}], []}]};
_ ->
{mod_proxy65_sm, []}
end,
case mod_proxy65_sm:activate_stream(SHA1, InitiatorJID, TargetJID,
ServerHost, Module) of
ok ->
IQ#iq{type = result, sub_el = Activated};
false ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_ITEM_NOT_FOUND]};
limit ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_RESOURCE_CONSTRAINT]};
conflict ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_CONFLICT]};
_ ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_INTERNAL_SERVER_ERROR]}
end;
_Reason ->
?ERROR_MSG("process IQ set ~p:~n~p~n", [?NS_BYTESTREAMS, _Reason]),
IQ#iq{type = error, sub_el = [SubEl, ?ERR_BAD_REQUEST]}
end;
deny ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
end;
%% Unknown "set" or "get" request
process_iq(_, #iq{type=Type, sub_el=SubEl} = IQ, _) when Type==get; Type==set ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_SERVICE_UNAVAILABLE]};
%% IQ "result" or "error".
process_iq(_, _, _) ->
ok.
%%%-------------------------
%%% Auxiliary functions.
%%%-------------------------
-define(FEATURE(Feat), {xmlelement,"feature",[{"var", Feat}],[]}).
iq_disco_info(Name, HTTP_Port) ->
HTTP_Bytestreams = case HTTP_Port of
"0" ->
[];
_ ->
[?FEATURE(?NS_HTTP_BYTESTREAMS)]
end,
[{xmlelement, "identity",
[{"category", "proxy"},
{"type", "bytestreams"},
{"name", Name}], []},
?FEATURE(?NS_DISCO_INFO),
?FEATURE(?NS_DISCO_ITEMS),
?FEATURE(?NS_VCARD),
?FEATURE(?NS_BYTESTREAMS)] ++ HTTP_Bytestreams.
iq_vcard(Lang) ->
[{xmlelement, "FN", [],
[{xmlcdata, "ejabberd/mod_proxy65"}]},
{xmlelement, "URL", [],
[{xmlcdata, ?EJABBERD_URI}]},
{xmlelement, "DESC", [],
[{xmlcdata, translate:translate(Lang, "ejabberd SOCKS5 Bytestreams module\n"
"Copyright (c) 2003-2006 Alexey Shchepin")}]}].
parse_options(ServerHost, Opts) ->
MyHost = gen_mod:get_opt(host, Opts, "proxy." ++ ServerHost),
Port = gen_mod:get_opt(port, Opts, 7777),
HTTP_Port = integer_to_list(gen_mod:get_opt(http_port, Opts, 0)),
HTTP_Base_Path = gen_mod:get_opt(http_base_path, Opts, ?DEFAULT_HTTP_BASE_PATH),
ACL = gen_mod:get_opt(access, Opts, all),
Name = gen_mod:get_opt(name, Opts, "SOCKS5 Bytestreams"),
IP = case gen_mod:get_opt(ip, Opts, none) of
none -> get_proxy_or_domainip(ServerHost, MyHost);
Addr -> Addr
end,
[_ | StrIP] = lists:append([[$. | integer_to_list(X)] || X <- inet:ip_to_bytes(IP)]),
StreamAddr = [{"jid", MyHost}, {"host", StrIP}, {"port", integer_to_list(Port)}],
{IP, #state{myhost = MyHost,
serverhost = ServerHost,
name = Name,
port = Port,
http_port = HTTP_Port,
http_base_path = HTTP_Base_Path,
stream_addr = StreamAddr,
acl = ACL}}.
%% Return the IP of the proxy host, or if not found, the ip of the xmpp domain
get_proxy_or_domainip(ServerHost, MyHost) ->
case inet:getaddr(MyHost, inet) of
{ok, Addr} -> Addr;
{error, _} ->
case inet:getaddr(ServerHost, inet) of
{ok, Addr} -> Addr;
{error, _} -> {127,0,0,1}
end
end.
|
