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-- 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 logger = require "logger";
local log = logger.init("xmppclient_listener");
local lxp = require "lxp"
local init_xmlhandlers = require "core.xmlhandlers"
local sm_new_session = require "core.sessionmanager".new_session;
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 sm_streamopened = sessionmanager.streamopened;
local sm_streamclosed = sessionmanager.streamclosed;
local st = require "util.stanza";
local config = require "core.configmanager";
local opt_keepalives = config.get("*", "core", "tcp_keepalives");
local stream_callbacks = { default_ns = "jabber:client",
streamopened = sm_streamopened, streamclosed = sm_streamclosed, handlestanza = core_process_stanza };
local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
function stream_callbacks.error(session, error, data)
if error == "no-stream" then
session.log("debug", "Invalid opening stream header");
session:close("invalid-namespace");
elseif error == "parse-error" then
(session.log or log)("debug", "Client XML parse error: %s", tostring(data));
session:close("xml-not-well-formed");
elseif error == "stream-error" then
local condition, text = "undefined-condition";
for child in data:children() do
if child.attr.xmlns == xmlns_xmpp_streams then
if child.name ~= "text" then
condition = child.name;
else
text = child:get_text();
end
if condition ~= "undefined-condition" and text then
break;
end
end
end
text = condition .. (text and (" ("..text..")") or "");
session.log("info", "Session closed by remote with error: %s", text);
session:close(nil, text);
end
end
local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), debug.traceback()); end
function stream_callbacks.handlestanza(a, b)
xpcall(function () core_process_stanza(a, b) end, handleerr);
end
local sessions = {};
local xmppclient = { default_port = 5222, 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
log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
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"] = "http://etherx.jabber.org/streams", 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.send("<?xml version='1.0'?>");
session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
end
if reason then
if type(reason) == "string" then -- assume stream error
log("info", "Disconnecting client, <stream:error> is: %s", reason);
session.send(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 client, <stream:error> is: %s", tostring(stanza));
session.send(stanza);
elseif reason.name then -- a stanza
log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
session.send(reason);
end
end
end
session.send("</stream:stream>");
session.conn:close();
xmppclient.ondisconnect(session.conn, (reason and (reason.text or reason.condition)) or reason or "session closed");
end
end
-- End of session methods --
function xmppclient.onincoming(conn, data)
local session = sessions[conn];
if not session then
session = sm_new_session(conn);
sessions[conn] = session;
session.log("info", "Client connected");
-- Client is using legacy SSL (otherwise mod_tls sets this flag)
if conn:ssl() then
session.secure = true;
end
if opt_keepalives ~= nil then
conn:setoption("keepalive", opt_keepalives);
end
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 xmppclient.ondisconnect(conn, err)
local session = sessions[conn];
if session then
(session.log or log)("info", "Client disconnected: %s", err);
sm_destroy_session(session, err);
sessions[conn] = nil;
session = nil;
end
end
connlisteners_register("xmppclient", xmppclient);
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