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
|
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local tostring, setmetatable = tostring, setmetatable;
local pairs, next= pairs, next;
local hosts = hosts;
local full_sessions = prosody.full_sessions;
local bare_sessions = prosody.bare_sessions;
local logger = require "util.logger";
local log = logger.init("sessionmanager");
local rm_load_roster = require "core.rostermanager".load_roster;
local config_get = require "core.configmanager".get;
local resourceprep = require "util.encodings".stringprep.resourceprep;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local uuid_generate = require "util.uuid".generate;
local initialize_filters = require "util.filters".initialize;
local gettime = require "socket".gettime;
module "sessionmanager"
function new_session(conn)
local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
local filter = initialize_filters(session);
local w = conn.write;
session.send = function (t)
if t.name then
t = filter("stanzas/out", t);
end
if t then
t = filter("bytes/out", tostring(t));
if t then
return w(conn, t);
end
end
end
session.ip = conn:ip();
local conn_name = "c2s"..tostring(session):match("[a-f0-9]+$");
session.log = logger.init(conn_name);
return session;
end
local resting_session = { -- Resting, not dead
destroyed = true;
type = "c2s_destroyed";
close = function (session)
session.log("debug", "Attempt to close already-closed session");
end;
filter = function (type, data) return data; end;
}; resting_session.__index = resting_session;
function retire_session(session)
local log = session.log or log;
for k in pairs(session) do
if k ~= "log" and k ~= "id" then
session[k] = nil;
end
end
function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); return false; end
function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
session.thread = { run = function (_, data) return session.data(data) end };
return setmetatable(session, resting_session);
end
function destroy_session(session, err)
(session.log or log)("debug", "Destroying session for %s (%s@%s)%s", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)", err and (": "..err) or "");
if session.destroyed then return; end
-- Remove session/resource from user's session list
if session.full_jid then
local host_session = hosts[session.host];
-- Allow plugins to prevent session destruction
if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then
return;
end
host_session.sessions[session.username].sessions[session.resource] = nil;
full_sessions[session.full_jid] = nil;
if not next(host_session.sessions[session.username].sessions) then
log("debug", "All resources of %s are now offline", session.username);
host_session.sessions[session.username] = nil;
bare_sessions[session.username..'@'..session.host] = nil;
end
host_session.events.fire_event("resource-unbind", {session=session, error=err});
end
retire_session(session);
end
function make_authenticated(session, username)
username = nodeprep(username);
if not username or #username == 0 then return nil, "Invalid username"; end
session.username = username;
if session.type == "c2s_unauthed" then
session.type = "c2s";
end
session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
return true;
end
-- returns true, nil on success
-- returns nil, err_type, err, err_message on failure
function bind_resource(session, resource)
if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
if session.resource then return nil, "cancel", "not-allowed", "Cannot bind multiple resources on a single connection"; end
-- We don't support binding multiple resources
local event_payload = { session = session, resource = resource };
if hosts[session.host].events.fire_event("pre-resource-bind", event_payload) == false then
local err = event_payload.error;
if err then return nil, err.type, err.condition, err.text; end
return nil, "cancel", "not-allowed";
else
-- In case a plugin wants to poke at it
resource = event_payload.resource;
end
resource = resourceprep(resource);
resource = resource ~= "" and resource or uuid_generate();
--FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
if not hosts[session.host].sessions[session.username] then
local sessions = { sessions = {} };
hosts[session.host].sessions[session.username] = sessions;
bare_sessions[session.username..'@'..session.host] = sessions;
else
local sessions = hosts[session.host].sessions[session.username].sessions;
if sessions[resource] then
-- Resource conflict
local policy = config_get(session.host, "conflict_resolve");
local increment;
if policy == "random" then
resource = uuid_generate();
increment = true;
elseif policy == "increment" then
increment = true; -- TODO ping old resource
elseif policy == "kick_new" then
return nil, "cancel", "conflict", "Resource already exists";
else -- if policy == "kick_old" then
sessions[resource]:close {
condition = "conflict";
text = "Replaced by new connection";
};
if not next(sessions) then
hosts[session.host].sessions[session.username] = { sessions = sessions };
bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
end
end
if increment and sessions[resource] then
local count = 1;
while sessions[resource.."#"..count] do
count = count + 1;
end
resource = resource.."#"..count;
end
end
end
session.resource = resource;
session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
hosts[session.host].sessions[session.username].sessions[resource] = session;
full_sessions[session.full_jid] = session;
local err;
session.roster, err = rm_load_roster(session.username, session.host);
if err then
full_sessions[session.full_jid] = nil;
hosts[session.host].sessions[session.username].sessions[resource] = nil;
session.full_jid = nil;
session.resource = nil;
if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
bare_sessions[session.username..'@'..session.host] = nil;
hosts[session.host].sessions[session.username] = nil;
end
session.log("error", "Roster loading failed: %s", err);
return nil, "cancel", "internal-server-error", "Error loading roster";
end
hosts[session.host].events.fire_event("resource-bind", {session=session});
return true;
end
function send_to_available_resources(username, host, stanza)
local jid = username.."@"..host;
local count = 0;
local user = bare_sessions[jid];
if user then
for k, session in pairs(user.sessions) do
if session.presence then
session.send(stanza);
count = count + 1;
end
end
end
return count;
end
function send_to_interested_resources(user, host, stanza)
local jid = user.."@"..host;
local count = 0;
local user = bare_sessions[jid];
if user then
for k, session in pairs(user.sessions) do
if session.interested then
session.send(stanza);
count = count + 1;
end
end
end
return count;
end
return _M;
|
