diff options
Diffstat (limited to 'plugins')
| -rw-r--r-- | plugins/mod_presence.lua | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/plugins/mod_presence.lua b/plugins/mod_presence.lua new file mode 100644 index 00000000..0d35feed --- /dev/null +++ b/plugins/mod_presence.lua @@ -0,0 +1,267 @@ +-- 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";
+
+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 to == nil and 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);
+ else
+ core_route_stanza(origin, stanza);
+ end
+ elseif (origin.type == "s2sin" or origin.type == "component") and hosts[host] then
+ if to == nil and 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
+
+return _M;
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