2 -- Copyright (C) 2008 Matthew Wild
3 -- Copyright (C) 2008 Waqas Hussain
5 -- This program is free software; you can redistribute it and/or
6 -- modify it under the terms of the GNU General Public License
7 -- as published by the Free Software Foundation; either version 2
8 -- of the License, or (at your option) any later version.
10 -- This program is distributed in the hope that it will be useful,
11 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
12 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 -- GNU General Public License for more details.
15 -- You should have received a copy of the GNU General Public License
16 -- along with this program; if not, write to the Free Software
17 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 local tonumber, tostring = tonumber, tostring;
23 local ipairs, pairs, print, next= ipairs, pairs, print, next;
24 local collectgarbage = collectgarbage;
25 local m_random = import("math", "random");
26 local format = import("string", "format");
29 local sessions = sessions;
31 local modulemanager = require "core.modulemanager";
32 local log = require "util.logger".init("sessionmanager");
34 local uuid_generate = require "util.uuid".generate;
35 local rm_load_roster = require "core.rostermanager".load_roster;
36 local config_get = require "core.configmanager".get;
38 local fire_event = require "core.eventmanager".fire_event;
40 local gettime = require "socket".gettime;
42 local st = require "util.stanza";
44 local newproxy = newproxy;
45 local getmetatable = getmetatable;
47 module "sessionmanager"
49 local open_sessions = 0;
51 function new_session(conn)
52 local session = { conn = conn, priority = 0, type = "c2s_unauthed", conntime = gettime() };
54 session.trace = newproxy(true);
55 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end;
57 open_sessions = open_sessions + 1;
58 log("info", "open sessions now: ".. open_sessions);
60 session.send = function (t) w(tostring(t)); end
61 session.ip = conn.ip();
65 function destroy_session(session, err)
66 (session.log or log)("info", "Destroying session");
68 -- Send unavailable presence
69 if session.presence then
70 local pres = st.presence{ type = "unavailable" };
71 if (not err) or err == "closed" then err = "connection closed"; end
72 pres:tag("status"):text("Disconnected: "..err);
73 session:dispatch_stanza(pres);
76 -- Remove session/resource from user's session list
77 if session.host and session.username then
78 -- FIXME: How can the below ever be nil? (but they sometimes are...)
79 if hosts[session.host] and hosts[session.host].sessions[session.username] then
80 if session.resource then
81 hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
84 if not next(hosts[session.host].sessions[session.username].sessions) then
85 log("debug", "All resources of %s are now offline", session.username);
86 hosts[session.host].sessions[session.username] = nil;
89 log("error", "host or session table didn't exist, please report this! Host: %s [%s] Sessions: %s [%s]",
90 tostring(hosts[session.host]), tostring(session.host),
91 tostring(hosts[session.host].sessions[session.username] ), tostring(session.username));
95 for k in pairs(session) do
102 function make_authenticated(session, username)
103 session.username = username;
104 if session.type == "c2s_unauthed" then
105 session.type = "c2s";
110 -- returns true, nil on success
111 -- returns nil, err_type, err, err_message on failure
112 function bind_resource(session, resource)
113 if not session.username then return nil, "auth", "not-authorized", "Cannot bind resource before authentication"; end
114 if session.resource then return nil, "cancel", "already-bound", "Cannot bind multiple resources on a single connection"; end
115 -- We don't support binding multiple resources
117 resource = resource or uuid_generate();
118 --FIXME: Randomly-generated resources must be unique per-user, and never conflict with existing
120 if not hosts[session.host].sessions[session.username] then
121 hosts[session.host].sessions[session.username] = { sessions = {} };
123 local sessions = hosts[session.host].sessions[session.username].sessions;
124 local limit = config_get(session.host, "core", "max_resources") or 10;
125 if #sessions >= limit then
126 return nil, "cancel", "conflict", "Resource limit reached; only "..limit.." resources allowed";
128 if sessions[resource] then
130 local policy = config_get(session.host, "core", "conflict_resolve");
132 if policy == "random" then
133 resource = uuid_generate();
135 elseif policy == "increment" then
136 increment = true; -- TODO ping old resource
137 elseif policy == "kick_new" then
138 return nil, "cancel", "conflict", "Resource already exists";
139 else -- if policy == "kick_old" then
140 hosts[session.host].sessions[session.username].sessions[resource]:close {
141 condition = "conflict";
142 text = "Replaced by new connection";
145 if increment and sessions[resource] then
147 while sessions[resource.."#"..count] do
150 resource = resource.."#"..count;
155 session.resource = resource;
156 session.full_jid = session.username .. '@' .. session.host .. '/' .. resource;
157 hosts[session.host].sessions[session.username].sessions[resource] = session;
159 session.roster = rm_load_roster(session.username, session.host);
164 function streamopened(session, attr)
165 local send = session.send;
166 session.host = attr.to or error("Client failed to specify destination hostname");
167 session.version = tonumber(attr.version) or 0;
168 session.streamid = m_random(1000000, 99999999);
169 (session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
172 send("<?xml version='1.0'?>");
173 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0'>", session.streamid, session.host));
175 if not hosts[session.host] then
176 -- We don't serve this host...
177 session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
182 local features = st.stanza("stream:features");
183 fire_event("stream-features", session, features);
187 (session.log or log)("info", "Sent reply <stream:stream> to client");
188 session.notopen = nil;
191 function send_to_available_resources(user, host, stanza)
193 local to = stanza.attr.to;
194 stanza.attr.to = nil;
195 local h = hosts[host];
196 if h and h.type == "local" then
197 local u = h.sessions[user];
199 for k, session in pairs(u.sessions) do
200 if session.presence then
201 session.send(stanza);