2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
11 local tonumber, tostring, setmetatable = tonumber, tostring, setmetatable;
12 local ipairs, pairs, print, next= ipairs, pairs, print, next;
13 local format = import("string", "format");
16 local full_sessions = full_sessions;
17 local bare_sessions = bare_sessions;
19 local modulemanager = require "core.modulemanager";
20 local logger = require "util.logger";
21 local log = logger.init("sessionmanager");
23 local uuid_generate = require "util.uuid".generate;
24 local rm_load_roster = require "core.rostermanager".load_roster;
25 local config_get = require "core.configmanager".get;
26 local nameprep = require "util.encodings".stringprep.nameprep;
27 local resourceprep = require "util.encodings".stringprep.resourceprep;
28 local nodeprep = require "util.encodings".stringprep.nodeprep;
30 local fire_event = require "core.eventmanager".fire_event;
31 local add_task = require "util.timer".add_task;
32 local gettime = require "socket".gettime;
34 local st = require "util.stanza";
36 local c2s_timeout = config_get("*", "core", "c2s_timeout");
38 local newproxy = newproxy;
39 local getmetatable = getmetatable;
41 module "sessionmanager"
43 local open_sessions = 0;
45 function new_session(conn)
46 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
48 session.trace = newproxy(true);
49 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
51 open_sessions = open_sessions + 1;
52 log("debug", "open sessions now: ".. open_sessions);
54 session.send = function (t) w(conn, tostring(t)); end
55 session.ip = conn:ip();
56 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
57 session.log = logger.init(conn_name);
60 add_task(c2s_timeout, function ()
61 if session.type == "c2s_unauthed" then
62 session:close("connection-timeout");
70 local resting_session = { -- Resting, not dead
72 type = "c2s_destroyed";
73 close = function (session)
74 session.log("debug", "Attempt to close already-closed session");
76 }; resting_session.__index = resting_session;
78 function retire_session(session)
79 local log = session.log or log;
80 for k in pairs(session) do
81 if k ~= "trace" and k ~= "log" and k ~= "id" then
86 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
87 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
88 return setmetatable(session, resting_session);
91 function destroy_session(session, err)
92 (session.log or log)("info", "Destroying session for %s (%s@%s)", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)");
93 if session.destroyed then return; end
95 -- Remove session/resource from user's session list
96 if session.full_jid then
97 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
98 full_sessions[session.full_jid] = nil;
100 if not next(hosts[session.host].sessions[session.username].sessions) then
101 log("debug", "All resources of %s are now offline", session.username);
102 hosts[session.host].sessions[session.username] = nil;
103 bare_sessions[session.username..'@'..session.host] = nil;
106 hosts[session.host].events.fire_event("resource-unbind", {session=session, error=err});
109 retire_session(session);
112 function make_authenticated(session, username)
113 username = nodeprep(username);
114 if not username or #username == 0 then return nil, "Invalid username"; end
115 session.username = username;
116 if session.type == "c2s_unauthed" then
117 session.type = "c2s";
119 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
123 -- returns true, nil on success
124 -- returns nil, err_type, err, err_message on failure
125 function bind_resource(session, resource)
126 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
127 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
128 -- We don't support binding multiple resources
130 resource = resourceprep(resource);
131 resource = resource ~= "" and resource or uuid_generate();
132 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
134 if not hosts[session.host].sessions[session.username] then
135 local sessions = { sessions = {} };
136 hosts[session.host].sessions[session.username] = sessions;
137 bare_sessions[session.username..'@'..session.host] = sessions;
139 local sessions = hosts[session.host].sessions[session.username].sessions;
140 local limit = config_get(session.host, "core", "max_resources") or 10;
141 if #sessions >= limit then
142 return nil, "cancel", "resource-constraint", "Resource limit reached; only "..limit.." resources allowed";
144 if sessions[resource] then
146 local policy = config_get(session.host, "core", "conflict_resolve");
148 if policy == "random" then
149 resource = uuid_generate();
151 elseif policy == "increment" then
152 increment = true; -- TODO ping old resource
153 elseif policy == "kick_new" then
154 return nil, "cancel", "conflict", "Resource already exists";
155 else -- if policy == "kick_old" then
156 sessions[resource]:close {
157 condition = "conflict";
158 text = "Replaced by new connection";
160 if not next(sessions) then
161 hosts[session.host].sessions[session.username] = { sessions = sessions };
162 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
165 if increment and sessions[resource] then
167 while sessions[resource.."#"..count] do
170 resource = resource.."#"..count;
175 session.resource = resource;
176 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
177 hosts[session.host].sessions[session.username].sessions[resource] = session;
178 full_sessions[session.full_jid] = session;
181 session.roster, err = rm_load_roster(session.username, session.host);
183 full_sessions[session.full_jid] = nil;
184 hosts[session.host].sessions[session.username].sessions[resource] = nil;
185 session.full_jid = nil;
186 session.resource = nil;
187 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
188 bare_sessions[session.username..'@'..session.host] = nil;
189 hosts[session.host].sessions[session.username] = nil;
191 return nil, "cancel", "internal-server-error", "Error loading roster";
194 hosts[session.host].events.fire_event("resource-bind", {session=session});
199 function streamopened(session, attr)
200 local send = session.send;
201 session.host = attr.to;
202 if not session.host then
203 session:close{ condition = "improper-addressing",
204 text = "A 'to' attribute is required on stream headers" };
207 session.host = nameprep(session.host);
208 session.version = tonumber(attr.version) or 0;
209 session.streamid = uuid_generate();
210 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
212 if not hosts[session.host] then
213 -- We don't serve this host...
214 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
218 send("<?xml version='1.0'?>");
219 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0' xml:lang='en'>", session.streamid, session.host));
221 (session.log or log)("debug", "Sent reply <stream:stream> to client");
222 session.notopen = nil;
224 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
225 -- since we now have a new stream header, session is secured
226 if session.secure == false then
227 session.secure = true;
230 local features = st.stanza("stream:features");
231 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
232 fire_event("stream-features", session, features);
238 function streamclosed(session)
239 session.log("debug", "Received </stream:stream>");
243 function send_to_available_resources(user, host, stanza)
244 local jid = user.."@"..host;
246 local user = bare_sessions[jid];
248 for k, session in pairs(user.sessions) do
249 if session.presence then
250 session.send(stanza);
258 function send_to_interested_resources(user, host, stanza)
259 local jid = user.."@"..host;
261 local user = bare_sessions[jid];
263 for k, session in pairs(user.sessions) do
264 if session.interested then
265 session.send(stanza);