2 -- Copyright (C) 2008-2009 Matthew Wild
3 -- Copyright (C) 2008-2009 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;
29 local fire_event = require "core.eventmanager".fire_event;
30 local add_task = require "util.timer".add_task;
31 local gettime = require "socket".gettime;
33 local st = require "util.stanza";
35 local c2s_timeout = config_get("*", "core", "c2s_timeout");
37 local newproxy = newproxy;
38 local getmetatable = getmetatable;
40 module "sessionmanager"
42 local open_sessions = 0;
44 function new_session(conn)
45 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
47 session.trace = newproxy(true);
48 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
50 open_sessions = open_sessions + 1;
51 log("debug", "open sessions now: ".. open_sessions);
53 session.send = function (t) w(conn, tostring(t)); end
54 session.ip = conn:ip();
55 local conn_name = "c2s"..tostring(conn):match("[a-f0-9]+$");
56 session.log = logger.init(conn_name);
59 add_task(c2s_timeout, function ()
60 if session.type == "c2s_unauthed" then
61 session:close("connection-timeout");
69 local resting_session = { -- Resting, not dead
71 }; resting_session.__index = resting_session;
73 function retire_session(session)
74 local log = session.log or log;
75 for k in pairs(session) do
76 if k ~= "trace" and k ~= "log" and k ~= "id" then
81 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end
82 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end
83 return setmetatable(session, resting_session);
86 function destroy_session(session, err)
87 (session.log or log)("info", "Destroying session for %s (%s@%s)", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)");
89 -- Remove session/resource from user's session list
90 if session.full_jid then
91 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
92 full_sessions[session.full_jid] = nil;
94 if not next(hosts[session.host].sessions[session.username].sessions) then
95 log("debug", "All resources of %s are now offline", session.username);
96 hosts[session.host].sessions[session.username] = nil;
97 bare_sessions[session.username..'@'..session.host] = nil;
100 hosts[session.host].events.fire_event("resource-unbind", {session=session, error=err});
103 retire_session(session);
106 function make_authenticated(session, username)
107 session.username = username;
108 if session.type == "c2s_unauthed" then
109 session.type = "c2s";
111 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
115 -- returns true, nil on success
116 -- returns nil, err_type, err, err_message on failure
117 function bind_resource(session, resource)
118 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
119 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
120 -- We don't support binding multiple resources
122 resource = resourceprep(resource);
123 resource = resource ~= "" and resource or uuid_generate();
124 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
126 if not hosts[session.host].sessions[session.username] then
127 local sessions = { sessions = {} };
128 hosts[session.host].sessions[session.username] = sessions;
129 bare_sessions[session.username..'@'..session.host] = sessions;
131 local sessions = hosts[session.host].sessions[session.username].sessions;
132 local limit = config_get(session.host, "core", "max_resources") or 10;
133 if #sessions >= limit then
134 return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
136 if sessions[resource] then
138 local policy = config_get(session.host, "core", "conflict_resolve");
140 if policy == "random" then
141 resource = uuid_generate();
143 elseif policy == "increment" then
144 increment = true; -- TODO ping old resource
145 elseif policy == "kick_new" then
146 return nil, "cancel", "conflict", "Resource already exists";
147 else -- if policy == "kick_old" then
148 sessions[resource]:close {
149 condition = "conflict";
150 text = "Replaced by new connection";
152 if not next(sessions) then
153 hosts[session.host].sessions[session.username] = { sessions = sessions };
154 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
157 if increment and sessions[resource] then
159 while sessions[resource.."#"..count] do
162 resource = resource.."#"..count;
167 session.resource = resource;
168 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
169 hosts[session.host].sessions[session.username].sessions[resource] = session;
170 full_sessions[session.full_jid] = session;
172 session.roster = rm_load_roster(session.username, session.host);
174 hosts[session.host].events.fire_event("resource-bind", {session=session});
179 function streamopened(session, attr)
180 local send = session.send;
181 session.host = attr.to or error("Client failed to specify destination hostname");
182 session.host = nameprep(session.host);
183 session.version = tonumber(attr.version) or 0;
184 session.streamid = uuid_generate();
185 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
187 if not hosts[session.host] then
188 -- We don't serve this host...
189 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
193 send("<?xml version='1.0'?>");
194 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));
196 (session.log or log)("debug", "Sent reply <stream:stream> to client");
197 session.notopen = nil;
199 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
200 -- since we now have a new stream header, session is secured
201 if session.secure == false then
202 session.secure = true;
205 local features = st.stanza("stream:features");
206 hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
207 fire_event("stream-features", session, features);
213 function streamclosed(session)
214 session.send("</stream:stream>");
215 session.notopen = true;
218 function send_to_available_resources(user, host, stanza)
219 local jid = user.."@"..host;
221 local user = bare_sessions[jid];
223 for k, session in pairs(user.sessions) do
224 if session.presence then
225 session.send(stanza);
233 function send_to_interested_resources(user, host, stanza)
234 local jid = user.."@"..host;
236 local user = bare_sessions[jid];
238 for k, session in pairs(user.sessions) do
239 if session.interested then
240 session.send(stanza);