Merged from Matthew

2 files changed, 223 insertions, 230 deletions

diff --git a/core/sessionmanager.lua b/core/sessionmanager.lua
index 8bdb93d0..19614311 100644
--- a/core/sessionmanager.lua
+++ b/core/sessionmanager.lua
@@ -19,30 +19,27 @@ local getmetatable = getmetatable;
 
 module "sessionmanager"
 
+local open_sessions = 0;
+
 function new_session(conn)
 	local session = { conn = conn,  priority = 0, type = "c2s_unauthed" };
 	if true then
 		session.trace = newproxy(true);
-		getmetatable(session.trace).__gc = function () print("Session got collected") end;
+		getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("Session got collected, now "..open_sessions.." sessions are allocated") end;
 	end
+	open_sessions = open_sessions + 1;
 	local w = conn.write;
 	session.send = function (t) w(tostring(t)); end
 	return session;
 end
 
 function destroy_session(session)
-	if not (session and session.disconnect) then return; end 
-	log("debug", "Destroying session...");
-	session.disconnect();
+	session.log("info", "Destroying session");
 	if session.username then
 		if session.resource then
 			hosts[session.host].sessions[session.username].sessions[session.resource] = nil;
 		end
-		local nomore = true;
-		for res, ssn in pairs(hosts[session.host].sessions[session.username]) do
-			nomore = false;
-		end
-		if nomore then
+		if not next(hosts[session.host].sessions[session.username], nil) then
 			hosts[session.host].sessions[session.username] = nil;
 		end
 	end
@@ -53,11 +50,6 @@ function destroy_session(session)
 			session[k] = nil;
 		end
 	end
-	collectgarbage("collect");
-	collectgarbage("collect");
-	collectgarbage("collect");
-	collectgarbage("collect");
-	collectgarbage("collect");
 end
 
 function send_to_session(session, data)
diff --git a/core/stanza_router.lua b/core/stanza_router.lua
index 3d53e797..06a5af9c 100644
--- a/core/stanza_router.lua
+++ b/core/stanza_router.lua
@@ -1,216 +1,217 @@
-
--- The code in this file should be self-explanatory, though the logic is horrible
--- for more info on that, see doc/stanza_routing.txt, which attempts to condense
--- the rules from the RFCs (mainly 3921)
-
-require "core.servermanager"
-
-local log = require "util.logger".init("stanzarouter")
-
-local st = require "util.stanza";
-local send = require "core.sessionmanager".send_to_session;
-local user_exists = require "core.usermanager".user_exists;
-
-local jid_split = require "util.jid".split;
-local print, debug = print, debug;
-
-function core_process_stanza(origin, stanza)
-	log("debug", "Received: "..tostring(stanza))
-	-- TODO verify validity of stanza (as well as JID validity)
-	if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then
-		if stanza.attr.type == "set" or stanza.attr.type == "get" then
-			error("Invalid IQ");
-		elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then
-			error("Invalid IQ");
-		end
-	end
-
-	if origin.type == "c2s" and not origin.full_jid
-		and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
-				and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
-		error("Client MUST bind resource after auth");
-	end
-
-	local to = stanza.attr.to;
-	stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)
-	-- TODO also, stazas should be returned to their original state before the function ends
-	
-	-- TODO presence subscriptions
-	if not to then
-			core_handle_stanza(origin, stanza);
-	elseif hosts[to] and hosts[to].type == "local" then
-		core_handle_stanza(origin, stanza);
-	elseif stanza.name == "iq" and not select(3, jid_split(to)) then
-		core_handle_stanza(origin, stanza);
-	elseif origin.type == "c2s" then
-		core_route_stanza(origin, stanza);
-	end
-end
-
--- This function handles stanzas which are not routed any further,
--- that is, they are handled by this server
-function core_handle_stanza(origin, stanza)
-	-- Handlers
-	if origin.type == "c2s" or origin.type == "c2s_unauthed" then
-		local session = origin;
-		
-		if stanza.name == "presence" and origin.roster then
-			if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then
-				for jid in pairs(origin.roster) do -- broadcast to all interested contacts
-					local subscription = origin.roster[jid].subscription;
-					if subscription == "both" or subscription == "from" then
-						stanza.attr.to = jid;
-						core_route_stanza(origin, stanza);
-					end
-				end
-				local node, host = jid_split(stanza.attr.from);
-				for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources and from resources
-					if res ~= origin then
-						if res.full_jid then -- to resource. FIXME is this check correct? Maybe it should be res.presence
-							stanza.attr.to = res.full_jid;
-							core_route_stanza(origin, stanza);
-						end
-						if res.presence then -- from all resources for which we have presence
-							res.presence.attr.to = origin.full_jid;
-							core_route_stanza(res, res.presence);
-							res.presence.attr.to = nil;
-						end
-					end
-				end
-				if not origin.presence then -- presence probes on initial presence
-					local probe = st.presence({from = origin.full_jid, type = "probe"});
-					for jid in pairs(origin.roster) do
-						local subscription = origin.roster[jid].subscription;
-						if subscription == "both" or subscription == "to" then
-							probe.attr.to = jid;
-							core_route_stanza(origin, probe);
-						end
-					end
-				end
-				origin.presence = stanza;
-				stanza.attr.to = nil; -- reset it
-			else
-				-- TODO error, bad type
-			end
-		else
-			log("debug", "Routing stanza to local");
-			handle_stanza(session, stanza);
-		end
-	end
-end
-
-function is_authorized_to_see_presence(origin, username, host)
-	local roster = datamanager.load(username, host, "roster") or {};
-	local item = roster[origin.username.."@"..origin.host];
-	return item and (item.subscription == "both" or item.subscription == "from");
-end
-
-function core_route_stanza(origin, stanza)
-	-- Hooks
-	--- ...later
-	
-	-- Deliver
-	local to = stanza.attr.to;
-	local node, host, resource = jid_split(to);
-
-	if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end
-
-	local host_session = hosts[host]
-	if host_session and host_session.type == "local" then
-		-- Local host
-		local user = host_session.sessions[node];
-		if user then
-			local res = user.sessions[resource];
-			if not res then
-				-- if we get here, resource was not specified or was unavailable
-				if stanza.name == "presence" then
-					if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
-						if stanza.attr.type == "probe" then
-							if is_authorized_to_see_presence(origin, node, host) then
-								for k in pairs(user.sessions) do -- return presence for all resources
-									if user.sessions[k].presence then
-										local pres = user.sessions[k].presence;
-										pres.attr.to = origin.full_jid;
-										pres.attr.from = user.sessions[k].full_jid;
-										send(origin, pres);
-										pres.attr.to = nil;
-										pres.attr.from = nil;
-									end
-								end
-							else
-								send(origin, st.presence({from=user.."@"..host, to=origin.username.."@"..origin.host, type="unsubscribed"}));
-							end
-						elseif stanza.attr.type == "subscribe" then
-							-- TODO
-						elseif stanza.attr.type == "unsubscribe" then
-							-- TODO
-						elseif stanza.attr.type == "subscribed" then
-							-- TODO
-						elseif stanza.attr.type == "unsubscribed" then
-							-- TODO
-						end -- discard any other type
-					else -- sender is available or unavailable
-						for k in pairs(user.sessions) do -- presence broadcast to all user resources
-							if user.sessions[k].full_jid then
-								stanza.attr.to = user.sessions[k].full_jid;
-								send(user.sessions[k], stanza);
-							end
-						end
-					end
-				elseif stanza.name == "message" then -- select a resource to recieve message
-					for k in pairs(user.sessions) do
-						if user.sessions[k].full_jid then
-							res = user.sessions[k];
-							break;
-						end
-					end
-					-- TODO find resource with greatest priority
-					send(res, stanza);
-				else
-					-- TODO send IQ error
-				end
-			else
-				-- User + resource is online...
-				stanza.attr.to = res.full_jid;
-				send(res, stanza); -- Yay \o/
-			end
-		else
-			-- user not online
-			if user_exists(node, host) then
-				if stanza.name == "presence" then
-					if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s?
-						-- TODO send last recieved unavailable presence
-					else
-						-- TODO send unavailable presence
-					end
-				elseif stanza.name == "message" then
-					-- TODO send message error, or store offline messages
-				elseif stanza.name == "iq" then
-					-- TODO send IQ error
-				end
-			else -- user does not exist
-				-- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
-				if stanza.name == "presence" then
-					if stanza.attr.type == "probe" then
-						send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"}));
-					end
-					-- else ignore
-				else
-					send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));
-				end
-			end
-		end
-	else
-		-- Remote host
-		if host_session then
-			-- Send to session
-		else
-			-- Need to establish the connection
-		end
-	end
-	stanza.attr.to = to; -- reset
-end
-
-function handle_stanza_toremote(stanza)
-	log("error", "Stanza bound for remote host, but s2s is not implemented");
-end
+

+-- The code in this file should be self-explanatory, though the logic is horrible

+-- for more info on that, see doc/stanza_routing.txt, which attempts to condense

+-- the rules from the RFCs (mainly 3921)

+

+require "core.servermanager"

+

+local log = require "util.logger".init("stanzarouter")

+

+local st = require "util.stanza";

+local send = require "core.sessionmanager".send_to_session;

+-- local send_s2s = require "core.s2smanager".send_to_host;

+local user_exists = require "core.usermanager".user_exists;

+

+local jid_split = require "util.jid".split;

+local print, debug = print, debug;

+

+function core_process_stanza(origin, stanza)

+	log("debug", "Received: "..tostring(stanza))

+	-- TODO verify validity of stanza (as well as JID validity)

+	if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then

+		if stanza.attr.type == "set" or stanza.attr.type == "get" then

+			error("Invalid IQ");

+		elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then

+			error("Invalid IQ");

+		end

+	end

+

+	if origin.type == "c2s" and not origin.full_jid

+		and not(stanza.name == "iq" and stanza.tags[1].name == "bind"

+				and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then

+		error("Client MUST bind resource after auth");

+	end

+

+	local to = stanza.attr.to;

+	stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)

+	-- TODO also, stazas should be returned to their original state before the function ends

+	

+	-- TODO presence subscriptions

+	if not to then

+			core_handle_stanza(origin, stanza);

+	elseif hosts[to] and hosts[to].type == "local" then

+		core_handle_stanza(origin, stanza);

+	elseif stanza.name == "iq" and not select(3, jid_split(to)) then

+		core_handle_stanza(origin, stanza);

+	elseif origin.type == "c2s" then

+		core_route_stanza(origin, stanza);

+	end

+end

+

+-- This function handles stanzas which are not routed any further,

+-- that is, they are handled by this server

+function core_handle_stanza(origin, stanza)

+	-- Handlers

+	if origin.type == "c2s" or origin.type == "c2s_unauthed" then

+		local session = origin;

+		

+		if stanza.name == "presence" and origin.roster then

+			if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then

+				for jid in pairs(origin.roster) do -- broadcast to all interested contacts

+					local subscription = origin.roster[jid].subscription;

+					if subscription == "both" or subscription == "from" then

+						stanza.attr.to = jid;

+						core_route_stanza(origin, stanza);

+					end

+				end

+				local node, host = jid_split(stanza.attr.from);

+				for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources and from resources

+					if res ~= origin then

+						if res.full_jid then -- to resource. FIXME is this check correct? Maybe it should be res.presence

+							stanza.attr.to = res.full_jid;

+							core_route_stanza(origin, stanza);

+						end

+						if res.presence then -- from all resources for which we have presence

+							res.presence.attr.to = origin.full_jid;

+							core_route_stanza(res, res.presence);

+							res.presence.attr.to = nil;

+						end

+					end

+				end

+				if not origin.presence then -- presence probes on initial presence

+					local probe = st.presence({from = origin.full_jid, type = "probe"});

+					for jid in pairs(origin.roster) do

+						local subscription = origin.roster[jid].subscription;

+						if subscription == "both" or subscription == "to" then

+							probe.attr.to = jid;

+							core_route_stanza(origin, probe);

+						end

+					end

+				end

+				origin.presence = stanza;

+				stanza.attr.to = nil; -- reset it

+			else

+				-- TODO error, bad type

+			end

+		else

+			log("debug", "Routing stanza to local");

+			handle_stanza(session, stanza);

+		end

+	end

+end

+

+function is_authorized_to_see_presence(origin, username, host)

+	local roster = datamanager.load(username, host, "roster") or {};

+	local item = roster[origin.username.."@"..origin.host];

+	return item and (item.subscription == "both" or item.subscription == "from");

+end

+

+function core_route_stanza(origin, stanza)

+	-- Hooks

+	--- ...later

+	

+	-- Deliver

+	local to = stanza.attr.to;

+	local node, host, resource = jid_split(to);

+

+	if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end

+

+	local host_session = hosts[host]

+	if host_session and host_session.type == "local" then

+		-- Local host

+		local user = host_session.sessions[node];

+		if user then

+			local res = user.sessions[resource];

+			if not res then

+				-- if we get here, resource was not specified or was unavailable

+				if stanza.name == "presence" then

+					if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then

+						if stanza.attr.type == "probe" then

+							if is_authorized_to_see_presence(origin, node, host) then

+								for k in pairs(user.sessions) do -- return presence for all resources

+									if user.sessions[k].presence then

+										local pres = user.sessions[k].presence;

+										pres.attr.to = origin.full_jid;

+										pres.attr.from = user.sessions[k].full_jid;

+										send(origin, pres);

+										pres.attr.to = nil;

+										pres.attr.from = nil;

+									end

+								end

+							else

+								send(origin, st.presence({from=user.."@"..host, to=origin.username.."@"..origin.host, type="unsubscribed"}));

+							end

+						elseif stanza.attr.type == "subscribe" then

+							-- TODO

+						elseif stanza.attr.type == "unsubscribe" then

+							-- TODO

+						elseif stanza.attr.type == "subscribed" then

+							-- TODO

+						elseif stanza.attr.type == "unsubscribed" then

+							-- TODO

+						end -- discard any other type

+					else -- sender is available or unavailable

+						for k in pairs(user.sessions) do -- presence broadcast to all user resources

+							if user.sessions[k].full_jid then

+								stanza.attr.to = user.sessions[k].full_jid;

+								send(user.sessions[k], stanza);

+							end

+						end

+					end

+				elseif stanza.name == "message" then -- select a resource to recieve message

+					for k in pairs(user.sessions) do

+						if user.sessions[k].full_jid then

+							res = user.sessions[k];

+							break;

+						end

+					end

+					-- TODO find resource with greatest priority

+					send(res, stanza);

+				else

+					-- TODO send IQ error

+				end

+			else

+				-- User + resource is online...

+				stanza.attr.to = res.full_jid;

+				send(res, stanza); -- Yay \o/

+			end

+		else

+			-- user not online

+			if user_exists(node, host) then

+				if stanza.name == "presence" then

+					if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s?

+						-- TODO send last recieved unavailable presence

+					else

+						-- TODO send unavailable presence

+					end

+				elseif stanza.name == "message" then

+					-- TODO send message error, or store offline messages

+				elseif stanza.name == "iq" then

+					-- TODO send IQ error

+				end

+			else -- user does not exist

+				-- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?

+				if stanza.name == "presence" then

+					if stanza.attr.type == "probe" then

+						send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"}));

+					end

+					-- else ignore

+				else

+					send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));

+				end

+			end

+		end

+	else

+		-- Remote host

+		if host_session then

+			-- Send to session

+		else

+			-- Need to establish the connection

+		end

+	end

+	stanza.attr.to = to; -- reset

+end

+

+function handle_stanza_toremote(stanza)

+	log("error", "Stanza bound for remote host, but s2s is not implemented");

+end