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 logger = require "logger";
23 local lxp = require "lxp"
24 local init_xmlhandlers = require "core.xmlhandlers"
25 local sm_new_session = require "core.sessionmanager".new_session;
26 local s2s_new_incoming = require "core.s2smanager".new_incoming;
27 local s2s_streamopened = require "core.s2smanager".streamopened;
28 local s2s_streamclosed = require "core.s2smanager".streamclosed;
29 local s2s_destroy_session = require "core.s2smanager".destroy_session;
30 local s2s_attempt_connect = require "core.s2smanager".attempt_connection;
31 local stream_callbacks = { ns = "http://etherx.jabber.org/streams", streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza };
33 function stream_callbacks.error(session, error, data)
34 if error == "no-stream" then
35 session:close("invalid-namespace");
37 session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
38 session:close("xml-not-well-formed");
42 local connlisteners_register = require "net.connlisteners".register;
44 local t_insert = table.insert;
45 local t_concat = table.concat;
46 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
47 local m_random = math.random;
48 local format = string.format;
49 local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session");
53 local xmppserver = { default_port = 5269, default_mode = "*a" };
55 -- These are session methods --
57 local function session_reset_stream(session)
59 local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|");
60 session.parser = parser;
62 session.notopen = true;
64 function session.data(conn, data)
65 local ok, err = parser:parse(data);
66 if ok then return; end
67 session:close("xml-not-well-formed");
74 local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
75 local function session_close(session, reason)
76 local log = session.log or log;
79 if type(reason) == "string" then -- assume stream error
80 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason);
81 session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
82 elseif type(reason) == "table" then
83 if reason.condition then
84 local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
86 stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
89 stanza:add_child(reason.extra);
91 log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza));
92 session.sends2s(stanza);
93 elseif reason.name then -- a stanza
94 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));
95 session.sends2s(reason);
99 session.sends2s("</stream:stream>");
100 session.conn.close();
101 xmppserver.disconnect(session.conn, "stream error");
106 -- End of session methods --
108 function xmppserver.listener(conn, data)
109 local session = sessions[conn];
111 session = s2s_new_incoming(conn);
112 sessions[conn] = session;
114 -- Logging functions --
116 local mainlog, log = log;
118 local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$");
119 log = logger.init(conn_name);
121 local print = function (...) log("info", t_concatall({...}, "\t")); end
124 print("Incoming s2s connection");
126 session.reset_stream = session_reset_stream;
127 session.close = session_close;
129 session_reset_stream(session); -- Initialise, ready for use
131 -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
132 -- this will avoid the useless indirection we have atm
133 -- (I'm on a mission, no time to fix now)
136 -- local function handleerr(err) print("Traceback:", err, debug.traceback()); end
137 -- session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end
140 session.data(conn, data);
144 function xmppserver.disconnect(conn, err)
145 local session = sessions[conn];
147 if err and err ~= "closed" and session.srv_hosts then
148 if s2s_attempt_connect(session, err) then
149 return; -- Session lives for now
152 (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err));
153 s2s_destroy_session(session);
154 sessions[conn] = nil;
156 collectgarbage("collect");
160 function xmppserver.register_outgoing(conn, session)
161 session.direction = "outgoing";
162 sessions[conn] = session;
164 session.reset_stream = session_reset_stream;
165 session_reset_stream(session); -- Initialise, ready for use
167 -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call,
168 -- this will avoid the useless indirection we have atm
169 -- (I'm on a mission, no time to fix now)
170 local function handleerr(err) print("Traceback:", err, debug.traceback()); end
171 session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end
174 connlisteners_register("xmppserver", xmppserver);
177 -- We need to perform some initialisation when a connection is created
178 -- We also need to perform that same initialisation at other points (SASL, TLS, ...)
180 -- ...and we need to handle data
181 -- ...and record all sessions associated with connections