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 initialize_filters = require "util.filters".initialize;
31 local fire_event = prosody.events.fire_event;
32 local add_task = require "util.timer".add_task;
33 local gettime = require "socket".gettime;
35 local st = require "util.stanza";
37 local c2s_timeout = config_get("*", "core", "c2s_timeout");
39 local newproxy = newproxy;
40 local getmetatable = getmetatable;
42 module "sessionmanager"
44 local open_sessions = 0;
46 function new_session(conn)
47 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
49 session.trace = newproxy(true);
50 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
52 open_sessions = open_sessions + 1;
53 log("debug", "open sessions now: ".. open_sessions);
55 local filter = initialize_filters(session);
57 session.send = function (t)
59 t = filter("stanzas/out", t);
62 t = filter("bytes/out", tostring(t));
68 session.ip = conn:ip();
69 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
70 session.log = logger.init(conn_name);
73 add_task(c2s_timeout, function ()
74 if session.type == "c2s_unauthed" then
75 session:close("connection-timeout");
83 local resting_session = { -- Resting, not dead
85 type = "c2s_destroyed";
86 close = function (session)
87 session.log("debug", "Attempt to close already-closed session");
89 filter = function (type, data) return data; end;
90 }; resting_session.__index = resting_session;
92 function retire_session(session)
93 local log = session.log or log;
94 for k in pairs(session) do
95 if k ~= "trace" and k ~= "log" and k ~= "id" then
100 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
101 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
102 return setmetatable(session, resting_session);
105 function destroy_session(session, err)
106 (session.log or log)("info", "Destroying session for %s (%s@%s)", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)");
107 if session.destroyed then return; end
109 -- Remove session/resource from user's session list
110 if session.full_jid then
111 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
112 full_sessions[session.full_jid] = nil;
114 if not next(hosts[session.host].sessions[session.username].sessions) then
115 log("debug", "All resources of %s are now offline", session.username);
116 hosts[session.host].sessions[session.username] = nil;
117 bare_sessions[session.username..'@'..session.host] = nil;
120 hosts[session.host].events.fire_event("resource-unbind", {session=session, error=err});
123 retire_session(session);
126 function make_authenticated(session, username)
127 username = nodeprep(username);
128 if not username or #username == 0 then return nil, "Invalid username"; end
129 session.username = username;
130 if session.type == "c2s_unauthed" then
131 session.type = "c2s";
133 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
137 -- returns true, nil on success
138 -- returns nil, err_type, err, err_message on failure
139 function bind_resource(session, resource)
140 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
141 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
142 -- We don't support binding multiple resources
144 resource = resourceprep(resource);
145 resource = resource ~= "" and resource or uuid_generate();
146 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
148 if not hosts[session.host].sessions[session.username] then
149 local sessions = { sessions = {} };
150 hosts[session.host].sessions[session.username] = sessions;
151 bare_sessions[session.username..'@'..session.host] = sessions;
153 local sessions = hosts[session.host].sessions[session.username].sessions;
154 local limit = config_get(session.host, "core", "max_resources") or 10;
155 if #sessions >= limit then
156 return nil, "cancel", "resource-constraint", "Resource limit reached; only "..limit.." resources allowed";
158 if sessions[resource] then
160 local policy = config_get(session.host, "core", "conflict_resolve");
162 if policy == "random" then
163 resource = uuid_generate();
165 elseif policy == "increment" then
166 increment = true; -- TODO ping old resource
167 elseif policy == "kick_new" then
168 return nil, "cancel", "conflict", "Resource already exists";
169 else -- if policy == "kick_old" then
170 sessions[resource]:close {
171 condition = "conflict";
172 text = "Replaced by new connection";
174 if not next(sessions) then
175 hosts[session.host].sessions[session.username] = { sessions = sessions };
176 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
179 if increment and sessions[resource] then
181 while sessions[resource.."#"..count] do
184 resource = resource.."#"..count;
189 session.resource = resource;
190 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
191 hosts[session.host].sessions[session.username].sessions[resource] = session;
192 full_sessions[session.full_jid] = session;
195 session.roster, err = rm_load_roster(session.username, session.host);
197 full_sessions[session.full_jid] = nil;
198 hosts[session.host].sessions[session.username].sessions[resource] = nil;
199 session.full_jid = nil;
200 session.resource = nil;
201 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
202 bare_sessions[session.username..'@'..session.host] = nil;
203 hosts[session.host].sessions[session.username] = nil;
205 return nil, "cancel", "internal-server-error", "Error loading roster";
208 hosts[session.host].events.fire_event("resource-bind", {session=session});
213 function streamopened(session, attr)
214 local send = session.send;
215 session.host = attr.to;
216 if not session.host then
217 session:close{ condition = "improper-addressing",
218 text = "A 'to' attribute is required on stream headers" };
221 session.host = nameprep(session.host);
222 session.version = tonumber(attr.version) or 0;
223 session.streamid = uuid_generate();
224 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
226 if not hosts[session.host] then
227 -- We don't serve this host...
228 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
232 send("<?xml version='1.0'?>");
233 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));
235 (session.log or log)("debug", "Sent reply <stream:stream> to client");
236 session.notopen = nil;
238 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
239 -- since we now have a new stream header, session is secured
240 if session.secure == false then
241 session.secure = true;
244 local features = st.stanza("stream:features");
245 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
246 fire_event("stream-features", session, features);
252 function streamclosed(session)
253 session.log("debug", "Received </stream:stream>");
257 function send_to_available_resources(user, host, stanza)
258 local jid = user.."@"..host;
260 local user = bare_sessions[jid];
262 for k, session in pairs(user.sessions) do
263 if session.presence then
264 session.send(stanza);
272 function send_to_interested_resources(user, host, stanza)
273 local jid = user.."@"..host;
275 local user = bare_sessions[jid];
277 for k, session in pairs(user.sessions) do
278 if session.interested then
279 session.send(stanza);