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
|
-- Prosody IM v0.3
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local tonumber, tostring = tonumber, tostring;
local ipairs, pairs, print, next= ipairs, pairs, print, next;
local collectgarbage = collectgarbage;
local m_random = import("math", "random");
local format = import("string", "format");
local hosts = hosts;
local sessions = sessions;
local modulemanager = require "core.modulemanager";
local log = require "util.logger".init("sessionmanager");
local error = error;
local uuid_generate = require "util.uuid".generate;
local rm_load_roster = require "core.rostermanager".load_roster;
local config_get = require "core.configmanager".get;
local fire_event = require "core.eventmanager".fire_event;
local gettime = require "socket".gettime;
local st = require "util.stanza";
local newproxy = newproxy;
local getmetatable = getmetatable;
module "sessionmanager"
local open_sessions = 0;
function new_session(conn)
local session = { conn = conn, priority = 0, type = "c2s_unauthed", conntime = gettime() };
if true then
session.trace = newproxy(true);
getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
end
open_sessions = open_sessions + 1;
log("info", "open sessions now: ".. open_sessions);
local w = conn.write;
session.send = function (t) w(tostring(t)); end
session.ip = conn.ip();
return session;
end
function destroy_session(session, err)
(session.log or log)("info", "Destroying session");
-- Send unavailable presence
if session.presence then
local pres = st.presence{ type = "unavailable" };
if (not err) or err == "closed" then err = "connection closed"; end
pres:tag("status"):text("Disconnected: "..err);
session:dispatch_stanza(pres);
end
-- Remove session/resource from user's session list
if session.host and session.username then
-- FIXME: How can the below ever be nil? (but they sometimes are...)
if hosts[session.host] and hosts[session.host].sessions[session.username] then
if session.resource then
hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
end
if not next(hosts[session.host].sessions[session.username].sessions) then
log("debug", "All resources of %s are now offline", session.username);
hosts[session.host].sessions[session.username] = nil;
end
else
log("error", "host or session table didn't exist, please report this! Host: %s [%s] Sessions: %s [%s]",
tostring(hosts[session.host]), tostring(session.host),
tostring(hosts[session.host].sessions[session.username] ), tostring(session.username));
end
end
for k in pairs(session) do
if k ~= "trace" then
session[k] = nil;
end
end
end
function make_authenticated(session, username)
session.username = username;
if session.type == "c2s_unauthed" then
session.type = "c2s";
end
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", "already-bound", "Cannot bind multiple resources on a single connection"; end
-- We don't support binding multiple resources
resource = 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
hosts[session.host].sessions[session.username] = { sessions = {} };
else
local sessions = hosts[session.host].sessions[session.username].sessions;
local limit = config_get(session.host, "core", "max_resources") or 10;
if #sessions >= limit then
return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
end
if sessions[resource] then
-- Resource conflict
local policy = config_get(session.host, "core", "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 };
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;
session.roster = rm_load_roster(session.username, session.host);
return true;
end
function streamopened(session, attr)
local send = session.send;
session.host = attr.to or error("Client failed to specify destination hostname");
session.version = tonumber(attr.version) or 0;
session.streamid = m_random(1000000, 99999999);
(session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
send("<?xml version='1.0'?>");
send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0'>", session.streamid, session.host));
if not hosts[session.host] then
-- We don't serve this host...
session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
return;
end
local features = st.stanza("stream:features");
fire_event("stream-features", session, features);
send(features);
(session.log or log)("info", "Sent reply <stream:stream> to client");
session.notopen = nil;
end
function send_to_available_resources(user, host, stanza)
local count = 0;
local to = stanza.attr.to;
stanza.attr.to = nil;
local h = hosts[host];
if h and h.type == "local" then
local u = h.sessions[user];
if u then
for k, session in pairs(u.sessions) do
if session.presence then
session.send(stanza);
count = count + 1;
end
end
end
end
stanza.attr.to = to;
return count;
end
return _M;
|
