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 = tonumber, tostring;
12 local ipairs, pairs, print, next= ipairs, pairs, print, next;
13 local collectgarbage = collectgarbage;
14 local m_random = import("math", "random");
15 local format = import("string", "format");
18 local full_sessions = full_sessions;
19 local bare_sessions = bare_sessions;
21 local modulemanager = require "core.modulemanager";
22 local log = require "util.logger".init("sessionmanager");
24 local uuid_generate = require "util.uuid".generate;
25 local rm_load_roster = require "core.rostermanager".load_roster;
26 local config_get = require "core.configmanager".get;
27 local nameprep = require "util.encodings".stringprep.nameprep;
29 local fire_event = require "core.eventmanager".fire_event;
31 local gettime = require "socket".gettime;
33 local st = require "util.stanza";
35 local newproxy = newproxy;
36 local getmetatable = getmetatable;
38 module "sessionmanager"
40 local open_sessions = 0;
42 function new_session(conn)
43 local session = { conn = conn, type = "c2s_unauthed", conntime = gettime() };
45 session.trace = newproxy(true);
46 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
48 open_sessions = open_sessions + 1;
49 log("debug", "open sessions now: ".. open_sessions);
51 session.send = function (t) w(tostring(t)); end
52 session.ip = conn.ip();
56 function destroy_session(session, err)
57 (session.log or log)("info", "Destroying session for %s (%s@%s)", session.full_jid or "(unknown)", session.username or "(unknown)", session.host or "(unknown)");
59 -- Remove session/resource from user's session list
60 if session.full_jid then
61 hosts[session.host].events.fire_event("resource-unbind", {session=session, error=err});
63 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
64 full_sessions[session.full_jid] = nil;
66 if not next(hosts[session.host].sessions[session.username].sessions) then
67 log("debug", "All resources of %s are now offline", session.username);
68 hosts[session.host].sessions[session.username] = nil;
69 bare_sessions[session.username..'@'..session.host] = nil;
73 for k in pairs(session) do
80 function make_authenticated(session, username)
81 session.username = username;
82 if session.type == "c2s_unauthed" then
85 session.log("info", "Authenticated as %s@%s", username or "(unknown)", session.host or "(unknown)");
89 -- returns true, nil on success
90 -- returns nil, err_type, err, err_message on failure
91 function bind_resource(session, resource)
92 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
93 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
94 -- We don't support binding multiple resources
96 resource = resource or uuid_generate();
97 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
99 if not hosts[session.host].sessions[session.username] then
100 local sessions = { sessions = {} };
101 hosts[session.host].sessions[session.username] = sessions;
102 bare_sessions[session.username..'@'..session.host] = sessions;
104 local sessions = hosts[session.host].sessions[session.username].sessions;
105 local limit = config_get(session.host, "core", "max_resources") or 10;
106 if #sessions >= limit then
107 return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
109 if sessions[resource] then
111 local policy = config_get(session.host, "core", "conflict_resolve");
113 if policy == "random" then
114 resource = uuid_generate();
116 elseif policy == "increment" then
117 increment = true; -- TODO ping old resource
118 elseif policy == "kick_new" then
119 return nil, "cancel", "conflict", "Resource already exists";
120 else -- if policy == "kick_old" then
121 sessions[resource]:close {
122 condition = "conflict";
123 text = "Replaced by new connection";
125 if not next(sessions) then
126 hosts[session.host].sessions[session.username] = { sessions = sessions };
127 bare_sessions[session.username.."@"..session.host] = hosts[session.host].sessions[session.username];
130 if increment and sessions[resource] then
132 while sessions[resource.."#"..count] do
135 resource = resource.."#"..count;
140 session.resource = resource;
141 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
142 hosts[session.host].sessions[session.username].sessions[resource] = session;
143 full_sessions[session.full_jid] = session;
145 session.roster = rm_load_roster(session.username, session.host);
147 hosts[session.host].events.fire_event("resource-bind", {session=session});
152 function streamopened(session, attr)
153 local send = session.send;
154 session.host = attr.to or error("Client failed to specify destination hostname");
155 session.host = nameprep(session.host);
156 session.version = tonumber(attr.version) or 0;
157 session.streamid = m_random(1000000, 99999999);
158 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
160 send("<?xml version='1.0'?>");
161 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));
163 if not hosts[session.host] then
164 -- We don't serve this host...
165 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
169 -- If session.secure is *false* (not nil) then it means we /were/ encrypting
170 -- since we now have a new stream header, session is secured
171 if session.secure == false then
172 session.secure = true;
175 local features = st.stanza("stream:features");
176 fire_event("stream-features", session, features);
180 (session.log or log)("debug", "Sent reply <stream:stream> to client");
181 session.notopen = nil;
184 function streamclosed(session)
185 session.send("</stream:stream>");
186 session.notopen = true;
189 function send_to_available_resources(user, host, stanza)
191 local to = stanza.attr.to;
192 stanza.attr.to = nil;
193 local h = hosts[host];
194 if h and h.type == "local" then
195 local u = h.sessions[user];
197 for k, session in pairs(u.sessions) do
198 if session.presence then
199 session.send(stanza);