aboutsummaryrefslogtreecommitdiffstats
path: root/core/componentmanager.lua
blob: c7d9407c7af2d558db5c4a467794d7cea98a3140 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
-- 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("componentmanager");
local configmanager = require "core.configmanager";
local eventmanager = require "core.eventmanager";
local modulemanager = require "core.modulemanager";
local core_route_stanza = core_route_stanza;
local jid_split = require "util.jid".split;
local st = require "util.stanza";
local hosts = hosts;

local pairs, type, tostring = pairs, type, tostring;

local components = {};

local disco_items = require "util.multitable".new();
local NULL = {};
require "core.discomanager".addDiscoItemsHandler("*host", function(reply, to, from, node)
	if #node == 0 and hosts[to] then
		for jid in pairs(disco_items:get(to) or NULL) do
			reply:tag("item", {jid = jid}):up();
		end
		return true;
	end
end);


module "componentmanager"

local function default_component_handler(origin, stanza)
	log("warn", "Stanza being handled by default component, bouncing error");
	if stanza.attr.type ~= "error" then
		core_route_stanza(nil, st.error_reply(stanza, "wait", "service-unavailable", "Component unavailable"));
	end
end


function load_enabled_components(config)
	local defined_hosts = config or configmanager.getconfig();
		
	for host, host_config in pairs(defined_hosts) do
		if host ~= "*" and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
			hosts[host] = { type = "component", host = host, connected = false, s2sout = {} };
			components[host] = default_component_handler;
			local ok, err = modulemanager.load(host, host_config.core.component_module);
			if not ok then
				log("error", "Error loading %s component %s: %s", tostring(host_config.core.component_module), tostring(host), tostring(err));
			else
				log("info", "Activated %s component: %s", host_config.core.component_module, host);
			end
		end
	end
end

eventmanager.add_event_hook("server-starting", load_enabled_components);

function handle_stanza(origin, stanza)
	local node, host = jid_split(stanza.attr.to);
	local component = nil;
	if not component then component = components[stanza.attr.to]; end -- hack to allow hooking node@server/resource and server/resource
	if not component then component = components[node.."@"..host]; end -- hack to allow hooking node@server
	if not component then component = components[host]; end
	if component then
		log("debug", "%s stanza being handled by component: %s", stanza.name, host);
		component(origin, stanza, hosts[host]);
	else
		log("error", "Component manager recieved a stanza for a non-existing component: " .. stanza.attr.to);
	end
end

function create_component(host, component)
	-- TODO check for host well-formedness
	local session = session or { type = "component", host = host, connected = true, s2sout = {} };
	return session;
end

function register_component(host, component, session)
	if not hosts[host] or (hosts[host].type == 'component' and not hosts[host].connected) then
		components[host] = component;
		hosts[host] = session or create_component(host, component);
		-- add to disco_items
		if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
			disco_items:set(host:sub(host:find(".", 1, true)+1), host, true);
		end
		-- FIXME only load for a.b.c if b.c has dialback, and/or check in config
		modulemanager.load(host, "dialback");
		log("debug", "component added: "..host);
		return session or hosts[host];
	else
		log("error", "Attempt to set component for existing host: "..host);
	end
end

function deregister_component(host)
	if components[host] then
		modulemanager.unload(host, "dialback");
		local host_config = configmanager.getconfig()[host];
		if host_config and ((host_config.core.enabled == nil or host_config.core.enabled) and type(host_config.core.component_module) == "string") then
			-- Set default handler
			components[host] = default_component_handler;
		else
			-- Component not in config, or disabled, remove
			hosts[host] = nil;
			components[host] = nil;
		end
		-- remove from disco_items
		if not(host:find("@", 1, true) or host:find("/", 1, true)) and host:find(".", 1, true) then
			disco_items:remove(host:sub(host:find(".", 1, true)+1), host);
		end
		log("debug", "component removed: "..host);
		return true;
	else
		log("error", "Attempt to remove component for non-existing host: "..host);
	end
end

function set_component_handler(host, handler)
	components[host] = handler;
end

return _M;