Rename plugins/s2s/ to plugins/mod_s2s/

1 files changed, 0 insertions, 486 deletions

diff --git a/plugins/s2s/mod_s2s.lua b/plugins/s2s/mod_s2s.lua
deleted file mode 100644
index 649cd595..00000000
--- a/plugins/s2s/mod_s2s.lua
+++ /dev/null
@@ -1,486 +0,0 @@
--- 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 = core_process_stanza;
-
-local tostring, type = tostring, type;
-local t_insert = table.insert;
-local xpcall, traceback = xpcall, 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 s2s_mark_connected = require "core.s2smanager".mark_connected;
-local uuid_gen = require "util.uuid".generate;
-local cert_verify_identity = require "util.x509".verify_identity;
-
-local s2sout = module:require("s2sout");
-
-local connect_timeout = module:get_option_number("s2s_timeout", 60);
-
-local sessions = module:shared("sessions");
-
-local log = module._log;
-
---- 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 "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host));
-	local dummy = {
-		type = "s2sin";
-		send = function(s)
-			(session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", traceback());
-		end;
-		dummy = true;
-	};
-	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 = "cancel"})
-				:tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up();
-			if reason then
-				reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"})
-					:text("Server-to-server connection failed: "..reason):up();
-			end
-			core_process_stanza(dummy, reply);
-		end
-		sendq[i] = nil;
-	end
-	session.sendq = nil;
-end
-
-module:hook("route/remote", function (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
-	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 (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
-			if host.sendq then t_insert(host.sendq, {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)});
-			else host.sendq = { {tostring(stanza), stanza.attr.type ~= "error" and stanza.attr.type ~= "result" and st.reply(stanza)} }; 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", tostring(stanza));
-			return false;
-		else
-			(host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host);
-			-- FIXME
-			if host.from_host ~= from_host then
-				log("error", "WARNING! This might, possibly, be a bug, but it might not...");
-				log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host));
-			end
-			host.sends2s(stanza);
-			host.log("debug", "stanza sent over "..host.type);
-			return true;
-		end
-	end
-end, 200);
-
-module:hook("route/remote", function (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);
-
-	-- 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", tostring(stanza.name));
-	s2sout.initiate_connection(host_session);
-	if (not host_session.connecting) and (not host_session.conn) then
-		log("warn", "Connection to %s failed already, destroying session...", to_host);
-		s2s_destroy_session(host_session, "Connection failed");
-		return false;
-	end
-	return true;
-end, 100);
-
---- Helper to check that a session peer's certificate is valid
-local function check_cert_status(session)
-	local conn = session.conn:socket()
-	local cert
-	if conn.getpeercertificate then
-		cert = conn:getpeercertificate()
-	end
-
-	if cert then
-		local chain_valid, errors = conn:getpeerverification()
-		-- Is there any interest in printing out all/the number of errors here?
-		if not chain_valid then
-			(session.log or log)("debug", "certificate chain validation result: invalid");
-			for depth, t in ipairs(errors) do
-				(session.log or log)("debug", "certificate error(s) at depth %d: %s", depth-1, table.concat(t, ", "))
-			end
-			session.cert_chain_status = "invalid";
-		else
-			(session.log or log)("debug", "certificate chain validation result: valid");
-			session.cert_chain_status = "valid";
-
-			local host = session.direction == "incoming" and session.from_host or session.to_host
-
-			-- We'll go ahead and verify the asserted identity if the
-			-- connecting server specified one.
-			if host then
-				if cert_verify_identity(host, "xmpp-server", cert) then
-					session.cert_identity_status = "valid"
-				else
-					session.cert_identity_status = "invalid"
-				end
-			end
-		end
-	end
-end
-
---- XMPP stream event handlers
-
-local stream_callbacks = { default_ns = "jabber:server", handlestanza =  core_process_stanza };
-
-local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
-
-function stream_callbacks.streamopened(session, attr)
-	local send = session.sends2s;
-	
-	-- TODO: #29: SASL/TLS on s2s streams
-	session.version = tonumber(attr.version) or 0;
-	
-	-- TODO: Rename session.secure to session.encrypted
-	if session.secure == false then
-		session.secure = true;
-	end
-
-	if session.direction == "incoming" then
-		-- Send a reply stream header
-		
-		-- Validate to/from
-		local to, from = nameprep(attr.to), nameprep(attr.from);
-		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
-		
-		session.streamid = uuid_gen();
-		(session.log or log)("debug", "Incoming s2s received %s", st.stanza("stream:stream", attr):top_tag());
-		if session.to_host then
-			if 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;
-			elseif hosts[session.to_host].disallow_s2s then
-				-- Attempting to connect to a host that disallows s2s
-				session:close({
-					condition = "policy-violation";
-					text = "Server-to-server communication is not allowed to this host";
-				});
-				return;
-			end
-		end
-
-		if session.secure and not session.cert_chain_status then check_cert_status(session); end
-
-		send("<?xml version='1.0'?>");
-		send(st.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, to=session.from_host, version=(session.version > 0 and "1.0" or nil) }):top_tag());
-		if session.version >= 1.0 then
-			local features = st.stanza("stream:features");
-			
-			if session.to_host then
-				hosts[session.to_host].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", 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
-		if not attr.id then error("stream response did not give us a streamid!!!"); end
-		session.streamid = attr.id;
-
-		if session.secure and not session.cert_chain_status then check_cert_status(session); end
-
-		-- Send unauthed buffer
-		-- (stanzas which are fine to send before dialback)
-		-- Note that this is *not* the stanza queue (which
-		-- we can only send if auth succeeds) :)
-		local send_buffer = session.send_buffer;
-		if send_buffer and #send_buffer > 0 then
-			log("debug", "Sending s2s send_buffer now...");
-			for i, data in ipairs(send_buffer) do
-				session.sends2s(tostring(data));
-				send_buffer[i] = nil;
-			end
-		end
-		session.send_buffer = nil;
-	
-		-- 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("s2s-authenticate-legacy", { origin = session });
-			else
-				s2s_mark_connected(session);
-			end
-		end
-	end
-	session.notopen = nil;
-	session.send = function(stanza) prosody.events.fire_event("route/remote", { from_host = session.to_host, to_host = session.from_host, stanza = stanza}) end;
-end
-
-function stream_callbacks.streamclosed(session)
-	(session.log or log)("debug", "Received </stream:stream>");
-	session:close();
-end
-
-function stream_callbacks.streamdisconnected(session, err)
-	if err and err ~= "closed" and session.direction == "outgoing" then
-		(session.log or log)("debug", "s2s connection attempt failed: %s", err);
-		if s2sout.attempt_connection(session, err) then
-			(session.log or log)("debug", "...so we're going to try another target");
-			return true; -- 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 or "closed"));
-	s2s_destroy_session(session, err);
-end
-
-function stream_callbacks.error(session, error, data)
-	if error == "no-stream" then
-		session:close("invalid-namespace");
-	elseif error == "parse-error" then
-		session.log("debug", "Server-to-server XML parse error: %s", tostring(error));
-		session:close("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[s2s]: %s: %s", tostring(err), traceback()); end
-function stream_callbacks.handlestanza(session, stanza)
-	if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client
-		stanza.attr.xmlns = nil;
-	end
-	stanza = session.filter("stanzas/in", stanza);
-	if stanza then
-		return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
-	end
-end
-
-local listener = {};
-
---- Session methods
-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, remote_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();
-		listener.ondisconnect(session.conn, remote_reason or (reason and (reason.text or reason.condition)) or reason or "stream closed");
-	end
-end
-
--- Session initialization logic shared by incoming and outgoing
-local function initialize_session(session)
-	local stream = new_xmpp_stream(session, stream_callbacks);
-	session.stream = stream;
-	
-	session.notopen = true;
-		
-	function session.reset_stream()
-		session.notopen = true;
-		session.stream:reset();
-	end
-	
-	local filter = session.filter;
-	function session.data(data)
-		data = filter("bytes/in", data);
-		if data then
-			local ok, err = stream:feed(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("not-well-formed");
-		end
-	end
-
-	session.close = session_close;
-
-	local handlestanza = stream_callbacks.handlestanza;
-	function session.dispatch_stanza(session, stanza)
-		return handlestanza(session, stanza);
-	end
-
-	local conn = session.conn;
-	add_task(connect_timeout, function ()
-		if session.conn ~= conn or session.connecting
-		or session.type == "s2sin" or session.type == "s2sout" then
-			return; -- Ok, we're connect[ed|ing]
-		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 listener.onconnect(conn)
-	if not sessions[conn] then -- May be an existing outgoing session
-		local session = s2s_new_incoming(conn);
-		sessions[conn] = session;
-		session.log("debug", "Incoming s2s connection");
-
-		local filter = initialize_filters(session);
-		local w = conn.write;
-		session.sends2s = function (t)
-			log("debug", "sending: %s", 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
-	
-		initialize_session(session);
-	end
-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
-		if stream_callbacks.streamdisconnected(session, err) then
-			return; -- Connection lives, for now
-		end
-	end
-	sessions[conn] = nil;
-end
-
-function listener.register_outgoing(conn, session)
-	session.direction = "outgoing";
-	sessions[conn] = session;
-	initialize_session(session);
-end
-
-s2sout.set_listener(listener);
-
-module:add_item("net-provider", {
-	name = "s2s";
-	listener = listener;
-	default_port = 5269;
-	encryption = "starttls";
-	multiplex = {
-		pattern = "^<.*:stream.*%sxmlns%s*=%s*(['\"])jabber:server%1.*>";
-	};
-});
-