X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=core%2Fstanza_router.lua;h=9533123e6eaa8b21f82bf30a993b6cf81ae9911d;hb=61fbebe4017d142510fbcfce61714ecb48b99503;hp=06a5af9cedabc2d803f7a7884dc7a2d7c0fb709d;hpb=1f145d52c3fd27eb9c1ff397942844ea51c1dd6c;p=prosody.git

diff --git a/core/stanza_router.lua b/core/stanza_router.lua
index 06a5af9c..9533123e 100644
--- a/core/stanza_router.lua
+++ b/core/stanza_router.lua
@@ -1,217 +1,289 @@
-
--- 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
+-- Prosody IM v0.2
+-- Copyright (C) 2008 Matthew Wild
+-- Copyright (C) 2008 Waqas Hussain
+-- 
+-- This program is free software; you can redistribute it and/or
+-- modify it under the terms of the GNU General Public License
+-- as published by the Free Software Foundation; either version 2
+-- of the License, or (at your option) any later version.
+-- 
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+-- 
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+--
+
+
+
+local log = require "util.logger".init("stanzarouter")
+
+local st = require "util.stanza";
+local send_s2s = require "core.s2smanager".send_to_host;
+local user_exists = require "core.usermanager".user_exists;
+
+local rostermanager = require "core.rostermanager";
+local sessionmanager = require "core.sessionmanager";
+local offlinemanager = require "core.offlinemanager";
+
+local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
+local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
+
+local modules_handle_stanza = require "core.modulemanager".handle_stanza;
+local component_handle_stanza = require "core.componentmanager".handle_stanza;
+
+local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
+local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
+local handle_normal_presence = require "core.presencemanager".handle_normal_presence;
+
+local format = string.format;
+local tostring = tostring;
+local t_concat = table.concat;
+local t_insert = table.insert;
+local tonumber = tonumber;
+local s_find = string.find;
+
+local jid_split = require "util.jid".split;
+local jid_prepped_split = require "util.jid".prepped_split;
+local print = print;
+local function checked_error_reply(origin, stanza)
+	if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
+		origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
+	end
+end
+
+function core_process_stanza(origin, stanza)
+	(origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
+
+	if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
+	-- 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 and 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
+
+	-- TODO also, stanzas should be returned to their original state before the function ends
+	if origin.type == "c2s" then
+		stanza.attr.from = origin.full_jid;
+	end
+	local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
+	local from = stanza.attr.from;
+	local node, host, resource;
+	local from_node, from_host, from_resource;
+	local to_bare, from_bare;
+	if to then
+		node, host, resource = jid_prepped_split(to);
+		if not host then
+			error("Invalid to JID");
+		end
+		to_bare = node and (node.."@"..host) or host; -- bare JID
+		if resource then to = to_bare.."/"..resource; else to = to_bare; end
+		stanza.attr.to = to;
+	end
+	if from then
+		from_node, from_host, from_resource = jid_prepped_split(from);
+		if not from_host then
+			error("Invalid from JID");
+		end
+		from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
+		if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
+		stanza.attr.from = from;
+	end
+
+	--[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
+		log("warn", "stanza recieved for a non-local server");
+		return; -- FIXME what should we do here?
+	end]] -- FIXME
+
+	-- FIXME do stanzas not of jabber:client get handled by components?
+	if (origin.type == "s2sin" or origin.type == "c2s") and (not xmlns or xmlns == "jabber:server" or xmlns == "jabber:client") then			
+		if origin.type == "s2sin" and not origin.dummy then
+			local host_status = origin.hosts[from_host];
+			if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
+				log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from_host, origin.from_host);
+				return; -- FIXME what should we do here? does this work with subdomains?
+			end
+		end
+		if not to then
+			core_handle_stanza(origin, stanza);
+		elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
+			core_handle_stanza(origin, stanza);
+		elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
+			modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
+		elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
+			component_handle_stanza(origin, stanza);
+		elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
+			component_handle_stanza(origin, stanza);
+		elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
+			component_handle_stanza(origin, stanza);
+		elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
+			handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
+		elseif origin.type ~= "c2s" and stanza.name == "iq" and not resource then -- directed at bare JID
+			core_handle_stanza(origin, stanza);
+		else
+			if origin.type == "c2s" and stanza.name == "presence" and to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then
+				origin.directed = origin.directed or {};
+				t_insert(origin.directed, to); -- FIXME does it make more sense to add to_bare rather than to?
+			end
+			core_route_stanza(origin, stanza);
+		end
+	else
+		core_handle_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 modules_handle_stanza(select(2, jid_split(stanza.attr.to)) or origin.host, origin, stanza) then return; end
+	if origin.type == "c2s" or origin.type == "s2sin" then
+		if origin.type == "c2s" then
+			if stanza.name == "presence" and origin.roster then
+				if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
+					handle_normal_presence(origin, stanza, core_route_stanza);
+				else
+					log("warn", "Unhandled c2s presence: %s", tostring(stanza));
+					checked_error_reply(origin, stanza);
+				end
+			else
+				log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
+				checked_error_reply(origin, stanza);
+			end
+		else -- s2s stanzas
+			log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
+			checked_error_reply(origin, stanza);
+		end
+	else
+		log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
+		checked_error_reply(origin, stanza);
+	end
+end
+
+function core_route_stanza(origin, stanza)
+	-- Hooks
+	--- ...later
+
+	-- Deliver
+	local to = stanza.attr.to;
+	local node, host, resource = jid_split(to);
+	local to_bare = node and (node.."@"..host) or host; -- bare JID
+	local from = stanza.attr.from;
+	local from_node, from_host, from_resource = jid_split(from);
+	local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
+
+	-- Auto-detect origin if not specified
+	origin = origin or hosts[from_host];
+	if not origin then return false; end
+	
+	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
+						handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
+					else -- sender is available or unavailable
+						for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
+							if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
+								stanza.attr.to = session.full_jid; -- reset at the end of function
+								session.send(stanza);
+							end
+						end
+					end
+				elseif stanza.name == "message" then -- select a resource to recieve message
+					local priority = 0;
+					local recipients = {};
+					for _, session in pairs(user.sessions) do -- find resource with greatest priority
+						local p = session.priority;
+						if p > priority then
+							priority = p;
+							recipients = {session};
+						elseif p == priority then
+							t_insert(recipients, session);
+						end
+					end
+					local count = 0;
+					for _, session in pairs(recipients) do
+						session.send(stanza);
+						count = count + 1;
+					end
+					if count == 0 then
+						offlinemanager.store(node, host, stanza);
+						-- TODO deal with storage errors
+					end
+				else
+					-- TODO send IQ error
+				end
+			else
+				-- User + resource is online...
+				stanza.attr.to = res.full_jid; -- reset at the end of function
+				res.send(stanza); -- Yay \o/
+			end
+		else
+			-- user not online
+			if user_exists(node, host) then
+				if stanza.name == "presence" then
+					if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
+						handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
+					else
+						-- TODO send unavailable presence or unsubscribed
+					end
+				elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
+					if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
+						offlinemanager.store(node, host, stanza);
+						-- FIXME don't store messages with only chat state notifications
+					end
+					-- TODO allow configuration of offline storage
+					-- TODO send error if not storing offline
+				elseif stanza.name == "iq" then
+					origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
+				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
+					local t = stanza.attr.type;
+					if t == "subscribe" or t == "probe" then
+						origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
+					end
+					-- else ignore
+				else
+					origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
+				end
+			end
+		end
+	elseif origin.type == "c2s" then
+		-- Remote host
+		local xmlns = stanza.attr.xmlns;
+		--stanza.attr.xmlns = "jabber:server";
+		stanza.attr.xmlns = nil;
+		log("debug", "sending s2s stanza: %s", tostring(stanza));
+		send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
+		stanza.attr.xmlns = xmlns; -- reset
+	elseif origin.type == "component" or origin.type == "local" then
+		-- Route via s2s for components and modules
+		log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
+		send_s2s(origin.host, host, stanza);
+	else
+		log("warn", "received stanza from unhandled connection type: %s", origin.type);
+	end
+	stanza.attr.to = to; -- reset
+end