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-- Prosody IM v0.4
-- Copyright (C) 2008-2009 Matthew Wild
-- Copyright (C) 2008-2009 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local log = require "util.logger".init("mod_presence")
local require = require;
local pairs, ipairs = pairs, ipairs;
local t_concat = table.concat;
local s_find = string.find;
local tonumber = tonumber;
local st = require "util.stanza";
local jid_split = require "util.jid".split;
local jid_bare = require "util.jid".bare;
local hosts = hosts;
local rostermanager = require "core.rostermanager";
local sessionmanager = require "core.sessionmanager";
local offlinemanager = require "core.offlinemanager";
local _core_route_stanza = core_route_stanza;
local core_route_stanza;
function core_route_stanza(origin, stanza)
if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
local node, host = jid_split(stanza.attr.to);
host = hosts[host];
if host and host.type == "local" then
handle_inbound_presence_subscriptions_and_probes(origin, stanza, jid_bare(stanza.attr.from), jid_bare(stanza.attr.to), core_route_stanza);
return;
end
end
_core_route_stanza(origin, stanza);
end
function handle_presence(origin, stanza, from_bare, to_bare, core_route_stanza, inbound)
local type = stanza.attr.type;
if type and type ~= "unavailable" and type ~= "error" then
if inbound then
handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
else
handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
end
elseif not inbound and not stanza.attr.to then
handle_normal_presence(origin, stanza, core_route_stanza);
else
core_route_stanza(origin, stanza);
end
end
function handle_normal_presence(origin, stanza, core_route_stanza)
if origin.roster then
for jid in pairs(origin.roster) do -- broadcast to all interested contacts
local subscription = origin.roster[jid].subscription;
if subscription == "both" or subscription == "from" then
stanza.attr.to = jid;
core_route_stanza(origin, stanza);
end
end
local node, host = jid_split(stanza.attr.from);
for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources
if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence
stanza.attr.to = res.full_jid;
core_route_stanza(origin, stanza);
end
end
if stanza.attr.type == nil and not origin.presence then -- initial presence
local probe = st.presence({from = origin.full_jid, type = "probe"});
for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to
local subscription = origin.roster[jid].subscription;
if subscription == "both" or subscription == "to" then
probe.attr.to = jid;
core_route_stanza(origin, probe);
end
end
for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources
if res ~= origin and res.presence then
res.presence.attr.to = origin.full_jid;
core_route_stanza(res, res.presence);
res.presence.attr.to = nil;
end
end
if origin.roster.pending then -- resend incoming subscription requests
for jid in pairs(origin.roster.pending) do
origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
end
end
local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests
if item.ask then
request.attr.to = jid;
core_route_stanza(origin, request);
end
end
local offline = offlinemanager.load(node, host);
if offline then
for _, msg in ipairs(offline) do
origin.send(msg); -- FIXME do we need to modify to/from in any way?
end
offlinemanager.deleteAll(node, host);
end
end
origin.priority = 0;
if stanza.attr.type == "unavailable" then
origin.presence = nil;
if origin.directed then
local old_from = stanza.attr.from;
stanza.attr.from = origin.full_jid;
for jid in pairs(origin.directed) do
stanza.attr.to = jid;
core_route_stanza(origin, stanza);
end
stanza.attr.from = old_from;
origin.directed = nil;
end
else
origin.presence = stanza;
local priority = stanza:child_with_name("priority");
if priority and #priority > 0 then
priority = t_concat(priority);
if s_find(priority, "^[+-]?[0-9]+$") then
priority = tonumber(priority);
if priority < -128 then priority = -128 end
if priority > 127 then priority = 127 end
origin.priority = priority;
end
end
end
stanza.attr.to = nil; -- reset it
else
log("error", "presence recieved from client with no roster");
end
end
function send_presence_of_available_resources(user, host, jid, recipient_session, core_route_stanza)
local h = hosts[host];
local count = 0;
if h and h.type == "local" then
local u = h.sessions[user];
if u then
for k, session in pairs(u.sessions) do
local pres = session.presence;
if pres then
pres.attr.to = jid;
pres.attr.from = session.full_jid;
core_route_stanza(session, pres);
pres.attr.to = nil;
pres.attr.from = nil;
count = count + 1;
end
end
end
end
log("info", "broadcasted presence of "..count.." resources from "..user.."@"..host.." to "..jid);
return count;
end
function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
local node, host = jid_split(from_bare);
local st_from, st_to = stanza.attr.from, stanza.attr.to;
stanza.attr.from, stanza.attr.to = from_bare, to_bare;
log("debug", "outbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
if stanza.attr.type == "subscribe" then
-- 1. route stanza
-- 2. roster push (subscription = none, ask = subscribe)
if rostermanager.set_contact_pending_out(node, host, to_bare) then
rostermanager.roster_push(node, host, to_bare);
end -- else file error
core_route_stanza(origin, stanza);
elseif stanza.attr.type == "unsubscribe" then
-- 1. route stanza
-- 2. roster push (subscription = none or from)
if rostermanager.unsubscribe(node, host, to_bare) then
rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed?
end -- else file error
core_route_stanza(origin, stanza);
elseif stanza.attr.type == "subscribed" then
-- 1. route stanza
-- 2. roster_push ()
-- 3. send_presence_of_available_resources
if rostermanager.subscribed(node, host, to_bare) then
rostermanager.roster_push(node, host, to_bare);
end
core_route_stanza(origin, stanza);
send_presence_of_available_resources(node, host, to_bare, origin, core_route_stanza);
elseif stanza.attr.type == "unsubscribed" then
-- 1. route stanza
-- 2. roster push (subscription = none or to)
if rostermanager.unsubscribed(node, host, to_bare) then
rostermanager.roster_push(node, host, to_bare);
end
core_route_stanza(origin, stanza);
end
stanza.attr.from, stanza.attr.to = st_from, st_to;
end
function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza)
local node, host = jid_split(to_bare);
local st_from, st_to = stanza.attr.from, stanza.attr.to;
stanza.attr.from, stanza.attr.to = from_bare, to_bare;
log("debug", "inbound presence "..stanza.attr.type.." from "..from_bare.." for "..to_bare);
if stanza.attr.type == "probe" then
if rostermanager.is_contact_subscribed(node, host, from_bare) then
if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
-- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
end
else
core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"}));
end
elseif stanza.attr.type == "subscribe" then
if rostermanager.is_contact_subscribed(node, host, from_bare) then
core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed
-- Sending presence is not clearly stated in the RFC, but it seems appropriate
if 0 == send_presence_of_available_resources(node, host, from_bare, origin, core_route_stanza) then
-- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too)
end
else
if not rostermanager.is_contact_pending_in(node, host, from_bare) then
if rostermanager.set_contact_pending_in(node, host, from_bare) then
sessionmanager.send_to_available_resources(node, host, stanza);
end -- TODO else return error, unable to save
end
end
elseif stanza.attr.type == "unsubscribe" then
if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then
rostermanager.roster_push(node, host, from_bare);
end
elseif stanza.attr.type == "subscribed" then
if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then
rostermanager.roster_push(node, host, from_bare);
end
elseif stanza.attr.type == "unsubscribed" then
if rostermanager.process_inbound_subscription_cancellation(node, host, from_bare) then
rostermanager.roster_push(node, host, from_bare);
end
end -- discard any other type
stanza.attr.from, stanza.attr.to = st_from, st_to;
end
local function presence_handler(data)
local origin, stanza = data.origin, data.stanza;
local to = stanza.attr.to;
local node, host = jid_split(to);
local to_bare = jid_bare(to);
local from_bare = jid_bare(stanza.attr.from);
if origin.type == "c2s" then
if to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then -- directed presence
origin.directed = origin.directed or {};
origin.directed[to] = true;
end
if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
elseif not to then
handle_normal_presence(origin, stanza, core_route_stanza);
else
core_route_stanza(origin, stanza);
end
elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then
if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error" then
handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
else
core_route_stanza(origin, stanza);
end
end
end
local add_handler = require "core.eventmanager2".add_handler;
local remove_handler = require "core.eventmanager2".remove_handler;
add_handler(module:get_host().."/presence", presence_handler);
module.unload = function()
remove_handler(module:get_host().."/presence", presence_handler);
end
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