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("error", "Write-error: %s", tostring(err));
50 session.ip = conn:ip();
51 local conn_name = "c2s"..tostring(session):match("[a-f0-9]+$");
52 session.log = logger.init(conn_name);
57 local resting_session = { -- Resting, not dead
59 type = "c2s_destroyed";
60 close = function (session)
61 session.log("debug", "Attempt to close already-closed session");
63 filter = function (type, data) return data; end; --luacheck: ignore 212/type
64 }; resting_session.__index = resting_session;
66 local function retire_session(session)
67 local log = session.log or log; --luacheck: ignore 431/log
68 for k in pairs(session) do
69 if k ~= "log" and k ~= "id" then
74 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); return false; end
75 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
76 session.thread = { run = function (_, data) return session.data(data) end };
77 return setmetatable(session, resting_session);
80 local function destroy_session(session, err)
81 (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 "");
82 if session.destroyed then return; end
84 -- Remove session/resource from user's session list
85 if session.full_jid then
86 local host_session = hosts[session.host];
88 -- Allow plugins to prevent session destruction
89 if host_session.events.fire_event("pre-resource-unbind", {session=session, error=err}) then
93 host_session.sessions[session.username].sessions[session.resource] = nil;
94 full_sessions[session.full_jid] = nil;
96 if not next(host_session.sessions[session.username].sessions) then
97 log("debug", "All resources of %s are now offline", session.username);
98 host_session.sessions[session.username] = nil;
99 bare_sessions[session.username..'@'..session.host] = nil;
102 host_session.events.fire_event("resource-unbind", {session=session, error=err});
105 retire_session(session);
108 local function make_authenticated(session, username)
109 username = nodeprep(username);
110 if not username or #username == 0 then return nil, "Invalid username"; end
111 session.username = username;
112 if session.type == "c2s_unauthed" then
113 session.type = "c2s";
115 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
119 -- returns true, nil on success
120 -- returns nil, err_type, err, err_message on failure
121 local function bind_resource(session, resource)
122 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
123 if session.resource then return nil, "cancel", "not-allowed", "Cannot bind multiple resources on a single connection"; end
124 -- We don't support binding multiple resources
126 local event_payload = { session = session, resource = resource };
127 if hosts[session.host].events.fire_event("pre-resource-bind", event_payload) == false then
128 local err = event_payload.error;
129 if err then return nil, err.type, err.condition, err.text; end
130 return nil, "cancel", "not-allowed";
132 -- In case a plugin wants to poke at it
133 resource = event_payload.resource;
136 resource = resourceprep(resource);
137 resource = resource ~= "" and resource or uuid_generate();
138 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
140 if not hosts[session.host].sessions[session.username] then
141 local sessions = { sessions = {} };
142 hosts[session.host].sessions[session.username] = sessions;
143 bare_sessions[session.username..'@'..session.host] = sessions;
145 local sessions = hosts[session.host].sessions[session.username].sessions;
146 if sessions[resource] then
148 local policy = config_get(session.host, "conflict_resolve");
150 if policy == "random" then
151 resource = uuid_generate();
153 elseif policy == "increment" then
154 increment = true; -- TODO ping old resource
155 elseif policy == "kick_new" then
156 return nil, "cancel", "conflict", "Resource already exists";
157 else -- if policy == "kick_old" then
158 sessions[resource]:close {
159 condition = "conflict";
160 text = "Replaced by new connection";
162 if not next(sessions) then
163 hosts[session.host].sessions[session.username] = { sessions = sessions };
164 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
167 if increment and sessions[resource] then
169 while sessions[resource.."#"..count] do
172 resource = resource.."#"..count;
177 session.resource = resource;
178 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
179 hosts[session.host].sessions[session.username].sessions[resource] = session;
180 full_sessions[session.full_jid] = session;
183 session.roster, err = rm_load_roster(session.username, session.host);
185 full_sessions[session.full_jid] = nil;
186 hosts[session.host].sessions[session.username].sessions[resource] = nil;
187 session.full_jid = nil;
188 session.resource = nil;
189 if next(bare_sessions[session.username..'@'..session.host].sessions) == nil then
190 bare_sessions[session.username..'@'..session.host] = nil;
191 hosts[session.host].sessions[session.username] = nil;
193 session.log("error", "Roster loading failed: %s", err);
194 return nil, "cancel", "internal-server-error", "Error loading roster";
197 hosts[session.host].events.fire_event("resource-bind", {session=session});
202 local function send_to_available_resources(username, host, stanza)
203 local jid = username.."@"..host;
205 local user = bare_sessions[jid];
207 for _, session in pairs(user.sessions) do
208 if session.presence then
209 session.send(stanza);
217 local function send_to_interested_resources(username, host, stanza)
218 local jid = username.."@"..host;
220 local user = bare_sessions[jid];
222 for _, session in pairs(user.sessions) do
223 if session.interested then
224 session.send(stanza);
233 new_session = new_session;
234 retire_session = retire_session;
235 destroy_session = destroy_session;
236 make_authenticated = make_authenticated;
237 bind_resource = bind_resource;
238 send_to_available_resources = send_to_available_resources;
239 send_to_interested_resources = send_to_interested_resources;