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
|
-- Prosody IM
-- 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 logger = require "logger";
local log = logger.init("xmppserver_listener");
local lxp = require "lxp"
local init_xmlhandlers = require "core.xmlhandlers"
local s2s_new_incoming = require "core.s2smanager".new_incoming;
local s2s_streamopened = require "core.s2smanager".streamopened;
local s2s_streamclosed = require "core.s2smanager".streamclosed;
local s2s_destroy_session = require "core.s2smanager".destroy_session;
local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
local stream_callbacks = { stream_tag = "http://etherx.jabber.org/streams\1stream",
default_ns = "jabber:server",
streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
function stream_callbacks.error(session, error, data)
if error == "no-stream" then
session:close("invalid-namespace");
else
session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
session:close("xml-not-well-formed");
end
end
local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), debug.traceback()); end
function stream_callbacks.handlestanza(a, b)
xpcall(function () core_process_stanza(a, b) end, handleerr);
end
local connlisteners_register = require "net.connlisteners".register;
local t_insert = table.insert;
local t_concat = table.concat;
local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end
local m_random = math.random;
local format = string.format;
local sessionmanager = require "core.sessionmanager";
local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
local st = require "util.stanza";
local sessions = {};
local xmppserver = { default_port = 5269, default_mode = "*a" };
-- These are session methods --
local function session_reset_stream(session)
-- Reset stream
local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "\1");
session.parser = parser;
session.notopen = true;
function session.data(conn, data)
local ok, err = parser:parse(data);
if ok then return; end
(session.log or log)("warn", "Received invalid XML: %s", data);
(session.log or log)("warn", "Problem was: %s", err);
session:close("xml-not-well-formed");
end
return true;
end
local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
local default_stream_attr = { ["xmlns:stream"] = stream_callbacks.stream_tag:match("[^\1]*"), xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
local function session_close(session, reason)
local log = session.log or log;
if session.conn then
if session.notopen then
session.sends2s("<?xml version='1.0'?>");
session.sends2s(st.stanza("stream:stream", default_stream_attr):top_tag());
end
if reason then
if type(reason) == "string" then -- assume stream error
log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
elseif type(reason) == "table" then
if reason.condition then
local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
if reason.text then
stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
end
if reason.extra then
stanza:add_child(reason.extra);
end
log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
session.sends2s(stanza);
elseif reason.name then -- a stanza
log("info", "Disconnecting %s->%s[%s], <stream:error> is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason));
session.sends2s(reason);
end
end
end
session.sends2s("</stream:stream>");
if session.notopen or not session.conn.close() then
session.conn.close(true); -- Force FIXME: timer?
end
session.conn.close();
xmppserver.disconnect(session.conn, "stream error");
end
end
-- End of session methods --
function xmppserver.listener(conn, data)
local session = sessions[conn];
if not session then
session = s2s_new_incoming(conn);
sessions[conn] = session;
-- Logging functions --
local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
session.log = logger.init(conn_name);
session.log("info", "Incoming s2s connection");
session.reset_stream = session_reset_stream;
session.close = session_close;
session_reset_stream(session); -- Initialise, ready for use
session.dispatch_stanza = stream_callbacks.handlestanza;
end
if data then
session.data(conn, data);
end
end
function xmppserver.status(conn, status)
if status == "ssl-handshake-complete" then
local session = sessions[conn];
if session and session.direction == "outgoing" then
local format, to_host, from_host = string.format, session.to_host, session.from_host;
session.log("debug", "Sending stream header...");
session.sends2s(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host));
end
end
end
function xmppserver.disconnect(conn, err)
local session = sessions[conn];
if session then
if err and err ~= "closed" and session.srv_hosts then
(session.log or log)("debug", "s2s connection closed unexpectedly");
if s2s_attempt_connect(session, err) then
(session.log or log)("debug", "...so we're going to try again");
return; -- Session lives for now
end
end
(session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err));
s2s_destroy_session(session);
sessions[conn] = nil;
session = nil;
collectgarbage("collect");
end
end
function xmppserver.register_outgoing(conn, session)
session.direction = "outgoing";
sessions[conn] = session;
session.reset_stream = session_reset_stream;
session.close = session_close;
session_reset_stream(session); -- Initialise, ready for use
--local function handleerr(err) print("Traceback:", err, debug.traceback()); end
--session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end
end
connlisteners_register("xmppserver", xmppserver);
-- We need to perform some initialisation when a connection is created
-- We also need to perform that same initialisation at other points (SASL, TLS, ...)
-- ...and we need to handle data
-- ...and record all sessions associated with connections
|
