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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 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("stanzarouter")
local hosts = _G.prosody.hosts;
local tostring = tostring;
local st = require "util.stanza";
local send_s2s = require "core.s2smanager".send_to_host;
local modules_handle_stanza = require "core.modulemanager".handle_stanza;
local component_handle_stanza = require "core.componentmanager".handle_stanza;
local jid_split = require "util.jid".split;
local jid_prepped_split = require "util.jid".prepped_split;
local full_sessions = _G.prosody.full_sessions;
local bare_sessions = _G.prosody.bare_sessions;
function core_process_stanza(origin, stanza)
(origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
-- Currently we guarantee every stanza to have an xmlns, should we keep this rule?
if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end
-- TODO verify validity of stanza (as well as JID validity)
if stanza.attr.type == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
if stanza.name == "iq" then
if not stanza.attr.id then stanza.attr.id = ""; end -- COMPAT Jabiru doesn't send the id attribute on roster requests
if (stanza.attr.type == "set" or stanza.attr.type == "get") and (#stanza.tags ~= 1) then
origin.send(st.error_reply(stanza, "modify", "bad-request"));
return;
end
end
if origin.type == "c2s" and stanza.attr.xmlns == "jabber:client" then
if not origin.full_jid
and not(stanza.name == "iq" and stanza.attr.type == "set" and stanza.tags[1] and stanza.tags[1].name == "bind"
and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
-- authenticated client isn't bound and current stanza is not a bind request
if stanza.attr.type ~= "result" and stanza.attr.type ~= "error" then
origin.send(st.error_reply(stanza, "auth", "not-authorized")); -- FIXME maybe allow stanzas to account or server
end
return;
end
-- TODO also, stanzas should be returned to their original state before the function ends
stanza.attr.from = origin.full_jid;
end
local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
local from = stanza.attr.from;
local node, host, resource;
local from_node, from_host, from_resource;
local to_bare, from_bare;
if to then
if full_sessions[to] or bare_sessions[to] or hosts[to] then
node, host = jid_split(to); -- TODO only the host is needed, optimize
else
node, host, resource = jid_prepped_split(to);
if not host then
log("warn", "Received stanza with invalid destination JID: %s", to);
if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The destination address is invalid: "..to));
end
return;
end
to_bare = node and (node.."@"..host) or host; -- bare JID
if resource then to = to_bare.."/"..resource; else to = to_bare; end
stanza.attr.to = to;
end
end
if from and not origin.full_jid then
-- We only stamp the 'from' on c2s stanzas, so we still need to check validity
from_node, from_host, from_resource = jid_prepped_split(from);
if not from_host then
log("warn", "Received stanza with invalid source JID: %s", from);
if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The source address is invalid: "..from));
end
return;
end
from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
stanza.attr.from = from;
end
--[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
log("warn", "stanza recieved for a non-local server");
return; -- FIXME what should we do here?
end]] -- FIXME
if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and xmlns == "jabber:client" then
if origin.type == "s2sin" and not origin.dummy then
local host_status = origin.hosts[from_host];
if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
log("warn", "Received a stanza claiming to be from %s, over a stream authed for %s!", from_host, origin.from_host);
return; -- FIXME what should we do here? does this work with subdomains?
end
end
core_post_stanza(origin, stanza, origin.full_jid);
else
local h = hosts[stanza.attr.to or origin.host or origin.to_host];
if h then
local event;
if stanza.attr.xmlns == "jabber:client" then
if stanza.name == "iq" and (stanza.attr.type == "set" or stanza.attr.type == "get") then
event = "stanza/iq/"..stanza.tags[1].attr.xmlns..":"..stanza.tags[1].name;
else
event = "stanza/"..stanza.name;
end
else
event = "stanza/"..stanza.attr.xmlns..":"..stanza.name;
end
if h.events.fire_event(event, {origin = origin, stanza = stanza}) then return; end
end
if host and not hosts[host] then host = nil; end -- COMPAT: workaround for a Pidgin bug which sets 'to' to the SRV result
modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
end
end
function core_post_stanza(origin, stanza, preevents)
local to = stanza.attr.to;
local node, host, resource = jid_split(to);
local to_bare = node and (node.."@"..host) or host; -- bare JID
local to_type;
if node then
if resource then
to_type = '/full';
else
to_type = '/bare';
if node == origin.username and host == origin.host then
stanza.attr.to = nil;
end
end
else
if host then
to_type = '/host';
else
to_type = '/bare';
end
end
local event_data = {origin=origin, stanza=stanza};
if preevents then -- c2s connection
if hosts[origin.host].events.fire_event('pre-'..stanza.name..to_type, event_data) then return; end -- do preprocessing
end
local h = hosts[to_bare] or hosts[host or origin.host];
if h then
if h.events.fire_event(stanza.name..to_type, event_data) then return; end -- do processing
if h.type == "component" then
component_handle_stanza(origin, stanza);
return;
end
modules_handle_stanza(h.host, origin, stanza);
else
core_route_stanza(origin, stanza);
end
end
function core_route_stanza(origin, stanza)
local node, host, resource = jid_split(stanza.attr.to);
local from_node, from_host, from_resource = jid_split(stanza.attr.from);
-- Auto-detect origin if not specified
origin = origin or hosts[from_host];
if not origin then return false; end
if hosts[host] then
-- old stanza routing code removed
core_post_stanza(origin, stanza);
elseif origin.type == "c2s" then
-- Remote host
if not hosts[from_host] then
log("error", "No hosts[from_host] (please report): %s", tostring(stanza));
end
if (not hosts[from_host]) or (not hosts[from_host].disallow_s2s) then
local xmlns = stanza.attr.xmlns;
--stanza.attr.xmlns = "jabber:server";
stanza.attr.xmlns = nil;
log("debug", "sending s2s stanza: %s", tostring(stanza));
send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
stanza.attr.xmlns = xmlns; -- reset
else
core_route_stanza(hosts[from_host], st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote servers is not allowed"));
end
elseif origin.type == "component" or origin.type == "local" then
-- Route via s2s for components and modules
log("debug", "Routing outgoing stanza for %s to %s", from_host, host);
send_s2s(from_host, host, stanza);
else
log("warn", "received %s stanza from unhandled connection type: %s", tostring(stanza.name), tostring(origin.type));
end
end
|
