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 log = require "util.logger".init("stanzarouter")
24 local st = require "util.stanza";
25 local send_s2s = require "core.s2smanager".send_to_host;
26 local user_exists = require "core.usermanager".user_exists;
28 local rostermanager = require "core.rostermanager";
29 local sessionmanager = require "core.sessionmanager";
30 local offlinemanager = require "core.offlinemanager";
32 local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
33 local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
35 local modules_handle_stanza = require "core.modulemanager".handle_stanza;
36 local component_handle_stanza = require "core.componentmanager".handle_stanza;
38 local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
39 local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
40 local handle_normal_presence = require "core.presencemanager".handle_normal_presence;
42 local format = string.format;
43 local tostring = tostring;
44 local t_concat = table.concat;
45 local t_insert = table.insert;
46 local tonumber = tonumber;
47 local s_find = string.find;
49 local jid_split = require "util.jid".split;
52 function core_process_stanza(origin, stanza)
53 (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:pretty_print()) --top_tag())
55 if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
56 -- TODO verify validity of stanza (as well as JID validity)
57 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then
58 if stanza.attr.type == "set" or stanza.attr.type == "get" then
60 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then
65 if origin.type == "c2s" and not origin.full_jid
66 and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
67 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
68 error("Client MUST bind resource after auth");
71 -- TODO also, stanzas should be returned to their original state before the function ends
72 if origin.type == "c2s" then
73 stanza.attr.from = origin.full_jid;
75 local to = stanza.attr.to;
76 local node, host, resource = jid_split(to);
77 local to_bare = node and (node.."@"..host) or host; -- bare JID
78 local from = stanza.attr.from;
79 local from_node, from_host, from_resource = jid_split(from);
80 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
82 if origin.type == "s2sin" then
83 if origin.from_host ~= from_host then -- remote server trying to impersonate some other server?
84 log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from, origin.from_host);
85 return; -- FIXME what should we do here? does this work with subdomains?
88 --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
89 log("warn", "stanza recieved for a non-local server");
90 return; -- FIXME what should we do here?
93 -- FIXME do stanzas not of jabber:client get handled by components?
94 if origin.type == "s2sin" or origin.type == "c2s" then
96 core_handle_stanza(origin, stanza);
97 elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
98 core_handle_stanza(origin, stanza);
99 elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
100 modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
101 elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
102 component_handle_stanza(origin, stanza);
103 elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
104 component_handle_stanza(origin, stanza);
105 elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
106 component_handle_stanza(origin, stanza);
107 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
108 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
109 elseif origin.type ~= "c2s" and stanza.name == "iq" and not resource then -- directed at bare JID
110 core_handle_stanza(origin, stanza);
112 core_route_stanza(origin, stanza);
115 core_handle_stanza(origin, stanza);
119 -- This function handles stanzas which are not routed any further,
120 -- that is, they are handled by this server
121 function core_handle_stanza(origin, stanza)
123 if modules_handle_stanza(stanza.attr.to or origin.host, origin, stanza) then return; end
124 if origin.type == "c2s" or origin.type == "s2sin" then
125 if origin.type == "c2s" then
126 if stanza.name == "presence" and origin.roster then
127 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
128 handle_normal_presence(origin, stanza, core_route_stanza);
130 log("warn", "Unhandled c2s presence: %s", tostring(stanza));
131 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" then
132 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
136 log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
137 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
138 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
142 log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
143 if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
144 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
148 log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
152 function core_route_stanza(origin, stanza)
157 local to = stanza.attr.to;
158 local node, host, resource = jid_split(to);
159 local to_bare = node and (node.."@"..host) or host; -- bare JID
160 local from = stanza.attr.from;
161 local from_node, from_host, from_resource = jid_split(from);
162 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
164 -- Auto-detect origin if not specified
165 origin = origin or hosts[from_host];
166 if not origin then return false; end
168 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end
170 local host_session = hosts[host]
171 if host_session and host_session.type == "local" then
173 local user = host_session.sessions[node];
175 local res = user.sessions[resource];
177 -- if we get here, resource was not specified or was unavailable
178 if stanza.name == "presence" then
179 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
180 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
181 else -- sender is available or unavailable
182 for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
183 if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
184 stanza.attr.to = session.full_jid; -- reset at the end of function
185 session.send(stanza);
189 elseif stanza.name == "message" then -- select a resource to recieve message
191 local recipients = {};
192 for _, session in pairs(user.sessions) do -- find resource with greatest priority
193 local p = session.priority;
196 recipients = {session};
197 elseif p == priority then
198 t_insert(recipients, session);
202 for _, session in pairs(recipients) do
203 session.send(stanza);
207 offlinemanager.store(node, host, stanza);
208 -- TODO deal with storage errors
211 -- TODO send IQ error
214 -- User + resource is online...
215 stanza.attr.to = res.full_jid; -- reset at the end of function
216 res.send(stanza); -- Yay \o/
220 if user_exists(node, host) then
221 if stanza.name == "presence" then
222 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
223 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
225 -- TODO send unavailable presence or unsubscribed
227 elseif stanza.name == "message" then
228 if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
229 offlinemanager.store(node, host, stanza);
230 -- FIXME don't store messages with only chat state notifications
232 -- TODO allow configuration of offline storage
233 -- TODO send error if not storing offline
234 elseif stanza.name == "iq" then
235 -- TODO send IQ error
237 else -- user does not exist
238 -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
239 if stanza.name == "presence" then
240 if stanza.attr.type == "probe" then
241 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
245 origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
249 elseif origin.type == "c2s" then
251 local xmlns = stanza.attr.xmlns;
252 --stanza.attr.xmlns = "jabber:server";
253 stanza.attr.xmlns = nil;
254 log("debug", "sending s2s stanza: %s", tostring(stanza));
255 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
256 stanza.attr.xmlns = xmlns; -- reset
257 elseif origin.type == "component" or origin.type == "local" then
258 -- Route via s2s for components and modules
259 log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
260 send_s2s(origin.host, host, stanza);
262 log("warn", "received stanza from unhandled connection type: %s", origin.type);
264 stanza.attr.to = to; -- reset