local stanza = st.stanza;
local nameprep = require "util.encodings".stringprep.nameprep;
+local fire_event = require "core.eventmanager".fire_event;
local uuid_gen = require "util.uuid".generate;
local logger_init = require "util.logger".init;
local dialback_secret = uuid_gen();
local adns, dns = require "net.adns", require "net.dns";
-
+local config = require "core.configmanager";
+local connect_timeout = config.get("*", "core", "s2s_timeout") or 60;
local dns_timeout = config.get("*", "core", "dns_timeout") or 60;
+local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3;
incoming_s2s = {};
+_G.prosody.incoming_s2s = incoming_s2s;
local incoming_s2s = incoming_s2s;
module "s2smanager"
local host = hosts[from_host].s2sout[to_host];
if host then
-- We have a connection to this host already
- if host.type == "s2sout_unauthed" and data.name ~= "db:verify" and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then
+ if host.type == "s2sout_unauthed" and (data.name ~= "db:verify" or not host.dialback_key) and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then
(host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host);
- if not host.notopen and not host.dialback_key and host.sends2s then
- host.log("debug", "dialback had not been initiated");
- initiate_dialback(host);
- end
-- Queue stanza until we are able to send it
if host.sendq then t_insert(host.sendq, {tostring(data), st.reply(data)});
else
log("debug", "opening a new outgoing connection for this stanza");
local host_session = new_outgoing(from_host, to_host);
+
-- Store in buffer
host_session.sendq = { {tostring(data), st.reply(data)} };
log("debug", "stanza [%s] queued until connection complete", tostring(data.name));
open_sessions = open_sessions + 1;
local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$"));
session.log = log;
- session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end
+ session.sends2s = function (t) log("debug", "sending: %s", (t.top_tag and t:top_tag()) or t:match("^([^>]*>?)"); w(conn, tostring(t)); end
incoming_s2s[session] = true;
+ add_task(connect_timeout, function ()
+ if session.conn ~= conn or
+ session.type == "s2sin" then
+ return; -- Ok, we're connect[ed|ing]
+ end
+ -- Not connected, need to close session and clean up
+ (session.log or log)("warn", "Destroying incomplete session %s->%s due to inactivity",
+ session.from_host or "(unknown)", session.to_host or "(unknown)");
+ session:close("connection-timeout");
+ end);
return session;
end
function new_outgoing(from_host, to_host)
- local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" };
+ local host_session = { to_host = to_host, from_host = from_host, host = from_host,
+ notopen = true, type = "s2sout_unauthed", direction = "outgoing" };
+
hosts[from_host].s2sout[to_host] = host_session;
local log;
host_session.log = log;
end
- -- This is the first call, can't fail (the first step is DNS lookup)
+ -- Kick the connection attempting machine
attempt_connection(host_session);
if not host_session.sends2s then
local from_host, to_host = host_session.from_host, host_session.to_host;
local connect_host, connect_port = idna_to_ascii(to_host), 5269;
+ if not connect_host then
+ return false;
+ end
+
if not err then -- This is our first attempt
log("debug", "First attempt to connect to %s, starting with SRV lookup...", to_host);
host_session.connecting = true;
host_session.connecting = nil;
-- COMPAT: This is a compromise for all you CNAME-(ab)users :)
- if not (reply and reply[1] and reply[1].a) then
+ if not (reply and reply[#reply] and reply[#reply].a) then
+ local count = max_dns_depth;
reply = dns.peek(connect_host, "CNAME", "IN");
- while reply and reply[1] and not reply[1].a and reply[1].cname do
- reply = dns.peek(reply[1].cname, "A", "IN") or dns.peek(reply[1].cname, "CNAME", "IN");
+ while count > 0 and reply and reply[#reply] and not reply[#reply].a and reply[#reply].cname do
+ log("debug", "Looking up %s (DNS depth is %d)", tostring(reply[#reply].cname), count);
+ reply = dns.peek(reply[#reply].cname, "A", "IN") or dns.peek(reply[#reply].cname, "CNAME", "IN");
+ count = count - 1;
end
end
-- end of CNAME resolving
- if reply and reply[1] and reply[1].a then
- log("debug", "DNS reply for %s gives us %s", connect_host, reply[1].a);
- return make_connect(host_session, reply[1].a, connect_port);
+ if reply and reply[#reply] and reply[#reply].a then
+ log("debug", "DNS reply for %s gives us %s", connect_host, reply[#reply].a);
+ return make_connect(host_session, reply[#reply].a, connect_port);
else
log("debug", "DNS lookup failed to get a response for %s", connect_host);
if not attempt_connection(host_session, "name resolution failed") then -- Retry if we can
-- otherwise it will assume it is a new incoming connection
cl.register_outgoing(conn, host_session);
- local w = conn.write;
- host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end
+ local w, log = conn.write, host_session.log;
+ host_session.sends2s = function (t) log("debug", "sending: %s", (t.top_tag and t:top_tag()) or t:match("^[^>]*>?")); w(conn, tostring(t)); end
- conn.write(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' xml:lang='en'>]], from_host, to_host));
+ conn:write(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' xml:lang='en'>]], from_host, to_host));
log("debug", "Connection attempt in progress...");
+ add_task(connect_timeout, function ()
+ if host_session.conn ~= conn or
+ host_session.type == "s2sout" or
+ host_session.connecting then
+ return; -- Ok, we're connect[ed|ing]
+ end
+ -- Not connected, need to close session and clean up
+ (host_session.log or log)("warn", "Destroying incomplete session %s->%s due to inactivity",
+ host_session.from_host or "(unknown)", host_session.to_host or "(unknown)");
+ host_session:close("connection-timeout");
+ end);
return true;
end
local send = session.sends2s;
-- TODO: #29: SASL/TLS on s2s streams
- session.version = 0; --tonumber(attr.version) or 0;
+ session.version = tonumber(attr.version) or 0;
+
+ if session.secure == false then
+ session.secure = true;
+ end
if session.version >= 1.0 and not (attr.to and attr.from) then
- log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC");
+
+ (session.log or log)("warn", "Remote of stream "..(session.from_host or "(unknown)").."->"..(session.to_host or "(unknown)")
+ .." failed to specify to (%s) and/or from (%s) hostname as per RFC", tostring(attr.to), tostring(attr.from));
end
if session.direction == "incoming" then
(session.log or log)("debug", "incoming s2s received <stream:stream>");
send("<?xml version='1.0'?>");
send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback',
- ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag());
+ ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host, version=(session.version > 0 and "1.0" or nil) }):top_tag());
if session.to_host and not hosts[session.to_host] then
-- Attempting to connect to a host we don't serve
session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host });
return;
end
if session.version >= 1.0 then
- send(st.stanza("stream:features")
- :tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up());
+ local features = st.stanza("stream:features");
+
+ if session.to_host then
+ hosts[session.to_host].events.fire_event("s2s-stream-features", { session = session, features = features });
+ else
+ (session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", session.from_host or "unknown host");
+ end
+
+ log("debug", "Sending stream features: %s", tostring(features));
+ send(features);
end
elseif session.direction == "outgoing" then
-- If we are just using the connection for verifying dialback keys, we won't try and auth it
end
session.send_buffer = nil;
- if not session.dialback_verifying then
- initiate_dialback(session);
- else
- mark_connected(session);
+ -- 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
+ log("debug", "Initiating dialback...");
+ initiate_dialback(session);
+ else
+ mark_connected(session);
+ end
end
end
return true;
end
+-- Stream is authorised, and ready for normal stanzas
function mark_connected(session)
local sendq, send = session.sendq, session.sends2s;
projects / prosody.git / blobdiff