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.
9 local tostring, setmetatable = tostring, setmetatable;
10 local pairs, next= pairs, next;
13 local full_sessions = prosody.full_sessions;
14 local bare_sessions = prosody.bare_sessions;
16 local logger = require "util.logger";
17 local log = logger.init("sessionmanager");
18 local rm_load_roster = require "core.rostermanager".load_roster;
19 local config_get = require "core.configmanager".get;
20 local resourceprep = require "util.encodings".stringprep.resourceprep;
21 local nodeprep = require "util.encodings".stringprep.nodeprep;
22 local uuid_generate = require "util.uuid".generate;
24 local initialize_filters = require "util.filters".initialize;
25 local gettime = require "socket".gettime;
29 local function new_session(conn)
30 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
31 local filter = initialize_filters(session);
33 session.send = function (t)
35 t = filter("stanzas/out", t);
38 t = filter("bytes/out", tostring(t));
40 local ret, err = w(conn, t);
42 session.log("debug", "Error writing to connection: %s", tostring(err));
49 session.ip = conn:ip();
50 local conn_name = "c2s"..tostring(session):match("[a-f0-9]+$");
51 session.log = logger.init(conn_name);
56 local resting_session = { -- Resting, not dead
58 type = "c2s_destroyed";
59 close = function (session)
60 session.log("debug", "Attempt to close already-closed session");
62 filter = function (type, data) return data; end; --luacheck: ignore 212/type
63 }; resting_session.__index = resting_session;
65 local function retire_session(session)
66 local log = session.log or log; --luacheck: ignore 431/log
67 for k in pairs(session) do
68 if k ~= "log" and k ~= "id" then
73 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); return false; end
74 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
75 return setmetatable(session, resting_session);
78 local function destroy_session(session, err)
79 (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 "");
80 if session.destroyed then return; end
82 -- Remove session/resource from user's session list
83 if session.full_jid then
84 local host_session = hosts[session.host];
86 -- Allow plugins to prevent session destruction
87 if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then
91 host_session.sessions[session.username].sessions[session.resource] = nil;
92 full_sessions[session.full_jid] = nil;
94 if not next(host_session.sessions[session.username].sessions) then
95 log("debug", "All resources of %s are now offline", session.username);
96 host_session.sessions[session.username] = nil;
97 bare_sessions[session.username..'@'..session.host] = nil;
100 host_session.events.fire_event("resource-unbind", {session=session, error=err});
103 retire_session(session);
106 local function make_authenticated(session, username)
107 username = nodeprep(username);
108 if not username or #username == 0 then return nil, "Invalid username"; end
109 session.username = username;
110 if session.type == "c2s_unauthed" then
111 session.type = "c2s";
113 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
117 -- returns true, nil on success
118 -- returns nil, err_type, err, err_message on failure
119 local function bind_resource(session, resource)
120 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
121 if session.resource then return nil, "cancel", "not-allowed", "Cannot bind multiple resources on a single connection"; end
122 -- We don't support binding multiple resources
124 local event_payload = { session = session, resource = resource };
125 if hosts[session.host].events.fire_event("pre-resource-bind", event_payload) == false then
126 local err = event_payload.error;
127 if err then return nil, err.type, err.condition, err.text; end
128 return nil, "cancel", "not-allowed";
130 -- In case a plugin wants to poke at it
131 resource = event_payload.resource;
134 resource = resourceprep(resource);
135 resource = resource ~= "" and resource or uuid_generate();
136 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
138 if not hosts[session.host].sessions[session.username] then
139 local sessions = { sessions = {} };
140 hosts[session.host].sessions[session.username] = sessions;
141 bare_sessions[session.username..'@'..session.host] = sessions;
143 local sessions = hosts[session.host].sessions[session.username].sessions;
144 if sessions[resource] then
146 local policy = config_get(session.host, "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 session.log("error", "Roster loading failed: %s", err);
192 return nil, "cancel", "internal-server-error", "Error loading roster";
195 hosts[session.host].events.fire_event("resource-bind", {session=session});
200 local function send_to_available_resources(username, host, stanza)
201 local jid = username.."@"..host;
203 local user = bare_sessions[jid];
205 for _, session in pairs(user.sessions) do
206 if session.presence then
207 session.send(stanza);
215 local function send_to_interested_resources(username, host, stanza)
216 local jid = username.."@"..host;
218 local user = bare_sessions[jid];
220 for _, session in pairs(user.sessions) do
221 if session.interested then
222 session.send(stanza);
231 new_session = new_session;
232 retire_session = retire_session;
233 destroy_session = destroy_session;
234 make_authenticated = make_authenticated;
235 bind_resource = bind_resource;
236 send_to_available_resources = send_to_available_resources;
237 send_to_interested_resources = send_to_interested_resources;