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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.
--
module:set_global();
local prosody = prosody;
local hosts = prosody.hosts;
local core_process_stanza = prosody.core_process_stanza;
local tostring, type = tostring, type;
local t_insert = table.insert;
local traceback = debug.traceback;
local add_task = require "util.timer".add_task;
local st = require "util.stanza";
local initialize_filters = require "util.filters".initialize;
local nameprep = require "util.encodings".stringprep.nameprep;
local new_xmpp_stream = require "util.xmppstream".new;
local s2s_new_incoming = require "core.s2smanager".new_incoming;
local s2s_new_outgoing = require "core.s2smanager".new_outgoing;
local s2s_destroy_session = require "core.s2smanager".destroy_session;
local uuid_gen = require "util.uuid".generate;
local fire_global_event = prosody.events.fire_event;
local runner = require "util.async".runner;
local connect = require "net.connect".connect;
local service = require "net.resolvers.service";
local errors = require "util.error";
local set = require "util.set";
local connect_timeout = module:get_option_number("s2s_timeout", 90);
local stream_close_timeout = module:get_option_number("s2s_close_timeout", 5);
local opt_keepalives = module:get_option_boolean("s2s_tcp_keepalives", module:get_option_boolean("tcp_keepalives", true));
local secure_auth = module:get_option_boolean("s2s_secure_auth", false); -- One day...
local secure_domains, insecure_domains =
module:get_option_set("s2s_secure_domains", {})._items, module:get_option_set("s2s_insecure_domains", {})._items;
local require_encryption = module:get_option_boolean("s2s_require_encryption", false);
local measure_connections = module:measure("connections", "amount");
local measure_ipv6 = module:measure("ipv6", "amount");
local sessions = module:shared("sessions");
local runner_callbacks = {};
local listener = {};
local log = module._log;
local s2s_service_options = {
default_port = 5269;
use_ipv4 = module:get_option_boolean("use_ipv4", true);
use_ipv6 = module:get_option_boolean("use_ipv6", true);
};
module:hook("stats-update", function ()
local count = 0;
local ipv6 = 0;
for _, session in pairs(sessions) do
count = count + 1;
if session.ip and session.ip:match(":") then
ipv6 = ipv6 + 1;
end
end
measure_connections(count);
measure_ipv6(ipv6);
end);
--- Handle stanzas to remote domains
local bouncy_stanzas = { message = true, presence = true, iq = true };
local function bounce_sendq(session, reason)
local sendq = session.sendq;
if not sendq then return; end
session.log("info", "Sending error replies for %d queued stanzas because of failed outgoing connection to %s", #sendq, session.to_host);
local dummy = {
type = "s2sin";
send = function ()
(session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", traceback());
end;
dummy = true;
close = function ()
(session.log or log)("error", "Attempting to close the dummy origin of s2s error replies, please report this! Traceback: %s", traceback());
end;
};
-- FIXME Allow for more specific error conditions
-- TODO use util.error ?
local error_type = "cancel";
local condition = "remote-server-not-found";
local reason_text;
if session.had_stream then -- set when a stream is opened by the remote
error_type, condition = "wait", "remote-server-timeout";
end
if errors.is_err(reason) then
error_type, condition, reason_text = reason.type, reason.condition, reason.text;
elseif type(reason) == "string" then
reason_text = reason;
end
for i, data in ipairs(sendq) do
local reply = data[2];
if reply and not(reply.attr.xmlns) and bouncy_stanzas[reply.name] then
reply.attr.type = "error";
reply:tag("error", {type = error_type, by = session.from_host})
:tag(condition, {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
if reason_text then
reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"})
:text("Server-to-server connection failed: "..reason_text):up();
end
core_process_stanza(dummy, reply);
end
sendq[i] = nil;
end
session.sendq = nil;
end
-- Handles stanzas to existing s2s sessions
function route_to_existing_session(event)
local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
if not hosts[from_host] then
log("warn", "Attempt to send stanza from %s - a host we don't serve", from_host);
return false;
end
if hosts[to_host] then
log("warn", "Attempt to route stanza to a remote %s - a host we do serve?!", from_host);
return false;
end
local host = hosts[from_host].s2sout[to_host];
if not host then return end
-- We have a connection to this host already
if host.type == "s2sout_unauthed" and (stanza.name ~= "db:verify" or not host.dialback_key) then
(host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host);
-- Queue stanza until we are able to send it
local queued_item = {
tostring(stanza),
stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza);
};
if host.sendq then
t_insert(host.sendq, queued_item);
else
-- luacheck: ignore 122
host.sendq = { queued_item };
end
host.log("debug", "stanza [%s] queued ", stanza.name);
return true;
elseif host.type == "local" or host.type == "component" then
log("error", "Trying to send a stanza to ourselves??")
log("error", "Traceback: %s", traceback());
log("error", "Stanza: %s", stanza);
return false;
else
if host.sends2s(stanza) then
return true;
end
end
end
-- Create a new outgoing session for a stanza
function route_to_new_session(event)
local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
log("debug", "opening a new outgoing connection for this stanza");
local host_session = s2s_new_outgoing(from_host, to_host);
host_session.version = 1;
-- Store in buffer
host_session.bounce_sendq = bounce_sendq;
host_session.sendq = { {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} };
log("debug", "stanza [%s] queued until connection complete", stanza.name);
connect(service.new(to_host, "xmpp-server", "tcp", s2s_service_options), listener, nil, { session = host_session });
return true;
end
local function keepalive(event)
return event.session.sends2s(' ');
end
module:hook("s2s-read-timeout", keepalive, -1);
function module.add_host(module)
if module:get_option_boolean("disallow_s2s", false) then
module:log("warn", "The 'disallow_s2s' config option is deprecated, please see https://prosody.im/doc/s2s#disabling");
return nil, "This host has disallow_s2s set";
end
module:hook("route/remote", route_to_existing_session, -1);
module:hook("route/remote", route_to_new_session, -10);
module:hook("s2s-authenticated", make_authenticated, -1);
module:hook("s2s-read-timeout", keepalive, -1);
module:hook_stanza("http://etherx.jabber.org/streams", "features", function (session, stanza) -- luacheck: ignore 212/stanza
if session.type == "s2sout" then
-- Stream is authenticated and we are seem to be done with feature negotiation,
-- so the stream is ready for stanzas. RFC 6120 Section 4.3
mark_connected(session);
return true;
elseif require_encryption and not session.secure then
session.log("warn", "Encrypted server-to-server communication is required but was not offered by %s", session.to_host);
session:close({
condition = "policy-violation",
text = "Encrypted server-to-server communication is required but was not offered",
}, nil, "Could not establish encrypted connection to remote server");
return true;
elseif not session.dialback_verifying then
session.log("warn", "No SASL EXTERNAL offer and Dialback doesn't seem to be enabled, giving up");
session:close({
condition = "unsupported-feature",
text = "No viable authentication method offered",
}, nil, "No viable authentication method offered by remote server");
return true;
end
end, -1);
end
-- Stream is authorised, and ready for normal stanzas
function mark_connected(session)
local sendq = session.sendq;
local from, to = session.from_host, session.to_host;
session.log("info", "%s s2s connection %s->%s complete", session.direction:gsub("^.", string.upper), from, to);
local event_data = { session = session };
if session.type == "s2sout" then
fire_global_event("s2sout-established", event_data);
hosts[from].events.fire_event("s2sout-established", event_data);
if session.incoming then
session.send = function(stanza)
return hosts[from].events.fire_event("route/remote", { from_host = from, to_host = to, stanza = stanza });
end;
end
else
if session.outgoing and not hosts[to].s2sout[from] then
session.log("debug", "Setting up to handle route from %s to %s", to, from);
hosts[to].s2sout[from] = session; -- luacheck: ignore 122
end
local host_session = hosts[to];
session.send = function(stanza)
return host_session.events.fire_event("route/remote", { from_host = to, to_host = from, stanza = stanza });
end;
fire_global_event("s2sin-established", event_data);
hosts[to].events.fire_event("s2sin-established", event_data);
end
if session.direction == "outgoing" then
if sendq then
session.log("debug", "sending %d queued stanzas across new outgoing connection to %s", #sendq, session.to_host);
local send = session.sends2s;
for i, data in ipairs(sendq) do
send(data[1]);
sendq[i] = nil;
end
session.sendq = nil;
end
end
end
function make_authenticated(event)
local session, host = event.session, event.host;
if not session.secure then
if require_encryption or (secure_auth and not(insecure_domains[host])) or secure_domains[host] then
session:close({
condition = "policy-violation",
text = "Encrypted server-to-server communication is required but was not "
..((session.direction == "outgoing" and "offered") or "used")
}, nil, "Could not establish encrypted connection to remote server");
end
end
if hosts[host] then
session:close({ condition = "undefined-condition", text = "Attempt to authenticate as a host we serve" });
end
if session.type == "s2sout_unauthed" then
session.type = "s2sout";
elseif session.type == "s2sin_unauthed" then
session.type = "s2sin";
elseif session.type ~= "s2sin" and session.type ~= "s2sout" then
return false;
end
if session.incoming and host then
if not session.hosts[host] then session.hosts[host] = {}; end
session.hosts[host].authed = true;
end
session.log("debug", "connection %s->%s is now authenticated for %s", session.from_host, session.to_host, host);
if (session.type == "s2sout" and session.external_auth ~= "succeeded") or session.type == "s2sin" then
-- Stream either used dialback for authentication or is an incoming stream.
mark_connected(session);
end
return true;
end
--- Helper to check that a session peer's certificate is valid
function check_cert_status(session)
local host = session.direction == "outgoing" and session.to_host or session.from_host
local conn = session.conn:socket()
local cert
if conn.getpeercertificate then
cert = conn:getpeercertificate()
end
return module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert });
end
--- XMPP stream event handlers
local stream_callbacks = { default_ns = "jabber:server" };
function stream_callbacks.handlestanza(session, stanza)
stanza = session.filter("stanzas/in", stanza);
session.thread:run(stanza);
end
local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
function stream_callbacks.streamopened(session, attr)
-- run _streamopened in async context
session.thread:run({ stream = "opened", attr = attr });
end
function stream_callbacks._streamopened(session, attr)
session.version = tonumber(attr.version) or 0;
session.had_stream = true; -- Had a stream opened at least once
-- TODO: Rename session.secure to session.encrypted
if session.secure == false then
session.secure = true;
session.encrypted = true;
local sock = session.conn:socket();
if sock.info then
local info = sock:info();
(session.log or log)("info", "Stream encrypted (%s with %s)", info.protocol, info.cipher);
session.compressed = info.compression;
else
(session.log or log)("info", "Stream encrypted");
end
end
if session.direction == "incoming" then
-- Send a reply stream header
-- Validate to/from
local to, from = attr.to, attr.from;
if to then to = nameprep(attr.to); end
if from then from = nameprep(attr.from); end
if not to and attr.to then -- COMPAT: Some servers do not reliably set 'to' (especially on stream restarts)
session:close({ condition = "improper-addressing", text = "Invalid 'to' address" });
return;
end
if not from and attr.from then -- COMPAT: Some servers do not reliably set 'from' (especially on stream restarts)
session:close({ condition = "improper-addressing", text = "Invalid 'from' address" });
return;
end
-- Set session.[from/to]_host if they have not been set already and if
-- this session isn't already authenticated
if session.type == "s2sin_unauthed" and from and not session.from_host then
session.from_host = from;
elseif from ~= session.from_host then
session:close({ condition = "improper-addressing", text = "New stream 'from' attribute does not match original" });
return;
end
if session.type == "s2sin_unauthed" and to and not session.to_host then
session.to_host = to;
elseif to ~= session.to_host then
session:close({ condition = "improper-addressing", text = "New stream 'to' attribute does not match original" });
return;
end
-- For convenience we'll put the sanitised values into these variables
to, from = session.to_host, session.from_host;
session.streamid = uuid_gen();
(session.log or log)("debug", "Incoming s2s received %s", st.stanza("stream:stream", attr):top_tag());
if to then
if not hosts[to] then
-- Attempting to connect to a host we don't serve
session:close({
condition = "host-unknown";
text = "This host does not serve "..to
});
return;
elseif not hosts[to].modules.s2s then
-- Attempting to connect to a host that disallows s2s
session:close({
condition = "policy-violation";
text = "Server-to-server communication is disabled for this host";
});
return;
end
end
if hosts[from] then
session:close({ condition = "undefined-condition", text = "Attempt to connect from a host we serve" });
return;
end
if session.secure and not session.cert_chain_status then
if check_cert_status(session) == false then
return;
end
end
session:open_stream(session.to_host, session.from_host)
session.notopen = nil;
if session.version >= 1.0 then
local features = st.stanza("stream:features");
if to then
hosts[to].events.fire_event("s2s-stream-features", { origin = session, features = features });
else
(session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", from or session.ip or "unknown host");
fire_global_event("s2s-stream-features-legacy", { origin = session, features = features });
end
if ( session.type == "s2sin" or session.type == "s2sout" ) or features.tags[1] then
log("debug", "Sending stream features: %s", features);
session.sends2s(features);
else
(session.log or log)("warn", "No stream features to offer, giving up");
session:close({ condition = "undefined-condition", text = "No stream features to offer" });
end
end
elseif session.direction == "outgoing" then
session.notopen = nil;
if not attr.id then
log("warn", "Stream response did not give us a stream id!");
session:close({ condition = "undefined-condition", text = "Missing stream ID" });
return;
end
session.streamid = attr.id;
if session.secure and not session.cert_chain_status then
if check_cert_status(session) == false then
return;
end
end
-- If server is pre-1.0, don't wait for features, just do dialback
if session.version < 1.0 then
if not session.dialback_verifying then
hosts[session.from_host].events.fire_event("s2sout-authenticate-legacy", { origin = session });
else
mark_connected(session);
end
end
end
end
function stream_callbacks.streamclosed(session)
(session.log or log)("debug", "Received </stream:stream>");
session:close(false);
end
function stream_callbacks.error(session, error, data)
if error == "no-stream" then
session.log("debug", "Invalid opening stream header (%s)", (data:gsub("^([^\1]+)\1", "{%1}")));
session:close("invalid-namespace");
elseif error == "parse-error" then
session.log("debug", "Server-to-server XML parse error: %s", error);
session:close("not-well-formed");
elseif error == "stream-error" then
local condition, text = "undefined-condition";
for child in data:childtags(nil, xmlns_xmpp_streams) do
if child.name ~= "text" then
condition = child.name;
else
text = child:get_text();
end
if condition ~= "undefined-condition" and text then
break;
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
--- Session methods
local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
-- reason: stream error to send to the remote server
-- remote_reason: stream error received from the remote server
-- bounce_reason: stanza error to pass to bounce_sendq because stream- and stanza errors are different
local function session_close(session, reason, remote_reason, bounce_reason)
local log = session.log or log;
if session.conn then
if session.notopen then
if session.direction == "incoming" then
session:open_stream(session.to_host, session.from_host);
else
session:open_stream(session.from_host, session.to_host);
end
end
if reason then -- nil == no err, initiated by us, false == initiated by remote
local stream_error;
if type(reason) == "string" then -- assume stream error
stream_error = st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' });
elseif type(reason) == "table" and not st.is_stanza(reason) then
stream_error = st.stanza("stream:error"):tag(reason.condition or "undefined-condition", stream_xmlns_attr):up();
if reason.text then
stream_error:tag("text", stream_xmlns_attr):text(reason.text):up();
end
if reason.extra then
stream_error:add_child(reason.extra);
end
end
if st.is_stanza(stream_error) then
-- to and from are never unknown on outgoing connections
log("debug", "Disconnecting %s->%s[%s], <stream:error> is: %s",
session.from_host or "(unknown host)" or session.ip, session.to_host or "(unknown host)", session.type, reason);
session.sends2s(stream_error);
end
end
session.sends2s("</stream:stream>");
function session.sends2s() return false; end
-- luacheck: ignore 422/reason
-- FIXME reason should be managed in a place common to c2s, s2s, bosh, component etc
local reason = remote_reason or (reason and (reason.text or reason.condition)) or reason;
session.log("info", "%s s2s stream %s->%s closed: %s", session.direction:gsub("^.", string.upper),
session.from_host or "(unknown host)", session.to_host or "(unknown host)", reason or "stream closed");
-- Authenticated incoming stream may still be sending us stanzas, so wait for </stream:stream> from remote
local conn = session.conn;
if reason == nil and not session.notopen and session.incoming then
add_task(stream_close_timeout, function ()
if not session.destroyed then
session.log("warn", "Failed to receive a stream close response, closing connection anyway...");
s2s_destroy_session(session, reason, bounce_reason);
conn:close();
end
end);
else
s2s_destroy_session(session, reason, bounce_reason);
conn:close(); -- Close immediately, as this is an outgoing connection or is not authed
end
end
end
function session_stream_attrs(session, from, to, attr) -- luacheck: ignore 212/session
if not from or (hosts[from] and hosts[from].modules.dialback) then
attr["xmlns:db"] = 'jabber:server:dialback';
end
if not from then
attr.from = '';
end
if not to then
attr.to = '';
end
end
-- Session initialization logic shared by incoming and outgoing
local function initialize_session(session)
local stream = new_xmpp_stream(session, stream_callbacks);
session.thread = runner(function (stanza)
if st.is_stanza(stanza) then
core_process_stanza(session, stanza);
elseif stanza.stream == "opened" then
stream_callbacks._streamopened(session, stanza.attr);
end
end, runner_callbacks, session);
local log = session.log or log;
session.stream = stream;
session.notopen = true;
function session.reset_stream()
session.notopen = true;
session.streamid = nil;
session.stream:reset();
end
session.stream_attrs = session_stream_attrs;
local filter = initialize_filters(session);
local conn = session.conn;
local w = conn.write;
function session.sends2s(t)
log("debug", "Sending[%s]: %s", session.type, t.top_tag and t:top_tag() or t:match("^[^>]*>?"));
if t.name then
t = filter("stanzas/out", t);
end
if t then
t = filter("bytes/out", tostring(t));
if t then
return w(conn, t);
end
end
end
function session.data(data)
data = filter("bytes/in", data);
if data then
local ok, err = stream:feed(data);
if ok then return; end
log("debug", "Received invalid XML (%s) %d bytes: %q", err, #data, data:sub(1, 300));
session:close("not-well-formed", nil, "Received invalid XML from remote server");
end
end
session.close = session_close;
local handlestanza = stream_callbacks.handlestanza;
function session.dispatch_stanza(session, stanza) -- luacheck: ignore 432/session
return handlestanza(session, stanza);
end
module:fire_event("s2s-created", { session = session });
add_task(connect_timeout, function ()
if session.type == "s2sin" or session.type == "s2sout" then
return; -- Ok, we're connected
elseif session.type == "s2s_destroyed" then
return; -- Session already destroyed
end
-- Not connected, need to close session and clean up
(session.log or log)("debug", "Destroying incomplete session %s->%s due to inactivity",
session.from_host or "(unknown)", session.to_host or "(unknown)");
session:close("connection-timeout");
end);
end
function runner_callbacks:ready()
self.data.log("debug", "Runner %s ready (%s)", self.thread, coroutine.status(self.thread));
self.data.conn:resume();
end
function runner_callbacks:waiting()
self.data.log("debug", "Runner %s waiting (%s)", self.thread, coroutine.status(self.thread));
self.data.conn:pause();
end
function runner_callbacks:error(err)
(self.data.log or log)("error", "Traceback[s2s]: %s", err);
end
function listener.onconnect(conn)
conn:setoption("keepalive", opt_keepalives);
local session = sessions[conn];
if not session then -- New incoming connection
session = s2s_new_incoming(conn);
sessions[conn] = session;
session.log("debug", "Incoming s2s connection");
initialize_session(session);
else -- Outgoing session connected
session:open_stream(session.from_host, session.to_host);
end
session.ip = conn:ip();
end
function listener.onincoming(conn, data)
local session = sessions[conn];
if session then
session.data(data);
end
end
function listener.onstatus(conn, status)
if status == "ssl-handshake-complete" then
local session = sessions[conn];
if session and session.direction == "outgoing" then
session.log("debug", "Sending stream header...");
session:open_stream(session.from_host, session.to_host);
end
end
end
function listener.ondisconnect(conn, err)
local session = sessions[conn];
if session then
sessions[conn] = nil;
(session.log or log)("debug", "s2s disconnected: %s->%s (%s)", session.from_host, session.to_host, err or "connection closed");
if session.secure == false and err then
-- TODO util.error-ify this
err = "Error during negotiation of encrypted connection: "..err;
end
s2s_destroy_session(session, err);
end
end
function listener.onfail(data, err)
local session = data and data.session;
if session then
if err and session.direction == "outgoing" and session.notopen then
(session.log or log)("debug", "s2s connection attempt failed: %s", err);
end
(session.log or log)("debug", "s2s disconnected: %s->%s (%s)", session.from_host, session.to_host, err or "connection closed");
s2s_destroy_session(session, err);
end
end
function listener.onreadtimeout(conn)
local session = sessions[conn];
if session then
local host = session.host or session.to_host;
return (hosts[host] or prosody).events.fire_event("s2s-read-timeout", { session = session });
end
end
function listener.register_outgoing(conn, session)
sessions[conn] = session;
initialize_session(session);
end
function listener.ondetach(conn)
sessions[conn] = nil;
end
function listener.onattach(conn, data)
local session = data and data.session;
if session then
session.conn = conn;
sessions[conn] = session;
initialize_session(session);
end
end
-- Complete the sentence "Your certificate " with what's wrong
local function friendly_cert_error(session) --> string
if session.cert_chain_status == "invalid" then
if session.cert_chain_errors then
local cert_errors = set.new(session.cert_chain_errors[1]);
if cert_errors:contains("certificate has expired") then
return "has expired";
elseif cert_errors:contains("self signed certificate") then
return "is self-signed";
end
end
return "is not trusted"; -- for some other reason
elseif session.cert_identity_status == "invalid" then
return "is not valid for this name";
end
-- this should normally be unreachable except if no s2s auth module was loaded
return "could not be validated";
end
function check_auth_policy(event)
local host, session = event.host, event.session;
local must_secure = secure_auth;
if not must_secure and secure_domains[host] then
must_secure = true;
elseif must_secure and insecure_domains[host] then
must_secure = false;
end
if must_secure and (session.cert_chain_status ~= "valid" or session.cert_identity_status ~= "valid") then
local reason = friendly_cert_error(session);
session.log("warn", "Forbidding insecure connection to/from %s because its certificate %s", host or session.ip or "(unknown host)", reason);
-- XEP-0178 recommends closing outgoing connections without warning
-- but does not give a rationale for this.
-- In practice most cases are configuration mistakes or forgotten
-- certificate renewals. We think it's better to let the other party
-- know about the problem so that they can fix it.
session:close({ condition = "not-authorized", text = "Your server's certificate "..reason },
nil, "Remote server's certificate "..reason);
return false;
end
end
module:hook("s2s-check-certificate", check_auth_policy, -1);
module:hook("server-stopping", function(event)
local reason = event.reason;
for _, session in pairs(sessions) do
session:close{ condition = "system-shutdown", text = reason };
end
end, -200);
module:provides("net", {
name = "s2s";
listener = listener;
default_port = 5269;
encryption = "starttls";
ssl_config = { -- FIXME This is not used atm, see mod_tls
verify = { "peer", "client_once", };
};
multiplex = {
protocol = "xmpp-server";
pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:server%1.*>";
};
});
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