--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/core/stanza_router.lua Tue Sep 30 19:52:00 2008 +0100
@@ -0,0 +1,292 @@
+
+-- 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")
+
+require "util.jid"
+local jid_split = jid.split;
+
+function core_process_stanza(origin, stanza)
+ local to = stanza.attr.to;
+
+ if not to or (hosts[to] and hosts[to].type == "local") then
+ core_handle_stanza(origin, stanza);
+ elseif origin.type == "c2s" then
+ core_route_stanza(origin, stanza);
+ end
+
+end
+
+function core_handle_stanza(origin, stanza)
+ -- Handlers
+ if origin.type == "c2s" or origin.type == "c2s_unauthed" then
+ local session = origin;
+ stanza.attr.from = session.full_jid;
+
+ log("debug", "Routing stanza");
+ -- Stanza has no to attribute
+ --local to_node, to_host, to_resource = jid_split(stanza.attr.to);
+ --if not to_host then error("Invalid destination JID: "..string.format("{ %q, %q, %q } == %q", to_node or "", to_host or "", to_resource or "", stanza.attr.to or "nil")); end
+
+ -- Stanza is to this server, or a user on this server
+ log("debug", "Routing stanza to local");
+ print(type(origin), type(stanza));
+ handle_stanza(session, stanza);
+ end
+end
+
+function core_route_stanza(origin, stanza)
+ -- Hooks
+ -- Deliver
+end
+
+function handle_stanza_nodest(stanza)
+ if stanza.name == "iq" then
+ handle_stanza_iq_no_to(session, stanza);
+ elseif stanza.name == "presence" then
+ -- Broadcast to this user's contacts
+ handle_stanza_presence_broadcast(session, stanza);
+ -- also, if it is initial presence, send out presence probes
+ if not session.last_presence then
+ handle_stanza_presence_probe_broadcast(session, stanza);
+ end
+ session.last_presence = stanza;
+ elseif stanza.name == "message" then
+ -- Treat as if message was sent to bare JID of the sender
+ handle_stanza_to_local_user(stanza);
+ end
+end
+
+function handle_stanza_tolocal(stanza)
+ local node, host, resource = jid.split(stanza.attr.to);
+ if host and hosts[host] and hosts[host].type == "local" then
+ -- Is a local host, handle internally
+ if node then
+ -- Is a local user, send to their session
+ log("debug", "Routing stanza to %s@%s", node, host);
+ if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
+ handle_stanza_to_local_user(stanza);
+ else
+ -- Is sent to this server, let's handle it...
+ log("debug", "Routing stanza to %s", host);
+ handle_stanza_to_server(stanza, session);
+ end
+ end
+end
+
+function handle_stanza_toremote(stanza)
+ log("error", "Stanza bound for remote host, but s2s is not implemented");
+end
+
+
+--[[
+local function route_c2s_stanza(session, stanza)
+ stanza.attr.from = session.full_jid;
+ if not stanza.attr.to and session.username then
+ -- Has no 'to' attribute, handle internally
+ if stanza.name == "iq" then
+ handle_stanza_iq_no_to(session, stanza);
+ elseif stanza.name == "presence" then
+ -- Broadcast to this user's contacts
+ handle_stanza_presence_broadcast(session, stanza);
+ -- also, if it is initial presence, send out presence probes
+ if not session.last_presence then
+ handle_stanza_presence_probe_broadcast(session, stanza);
+ end
+ session.last_presence = stanza;
+ elseif stanza.name == "message" then
+ -- Treat as if message was sent to bare JID of the sender
+ handle_stanza_to_local_user(stanza);
+ end
+ end
+ local node, host, resource = jid.split(stanza.attr.to);
+ if host and hosts[host] and hosts[host].type == "local" then
+ -- Is a local host, handle internally
+ if node then
+ -- Is a local user, send to their session
+ if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
+ handle_stanza_to_local_user(stanza);
+ else
+ -- Is sent to this server, let's handle it...
+ handle_stanza_to_server(stanza, session);
+ end
+ else
+ -- Is not for us or a local user, route accordingly
+ route_s2s_stanza(stanza);
+ end
+end
+
+function handle_stanza_no_to(session, stanza)
+ if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
+ local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns);
+ if stanza.attr.type == "get" or stanza.attr.type == "set" then
+ if iq_handlers[xmlns] then
+ if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it
+ end
+ -- Oh, handler didn't handle it. Need to send service-unavailable now.
+ log("warn", "Unhandled namespace: "..xmlns);
+ session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
+ return; -- All done!
+ end
+end
+
+function handle_stanza_to_local_user(stanza)
+ if stanza.name == "message" then
+ handle_stanza_message_to_local_user(stanza);
+ elseif stanza.name == "presence" then
+ handle_stanza_presence_to_local_user(stanza);
+ elseif stanza.name == "iq" then
+ handle_stanza_iq_to_local_user(stanza);
+ end
+end
+
+function handle_stanza_message_to_local_user(stanza)
+ local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
+ local destuser = hosts[host].sessions[node];
+ if destuser then
+ if resource and destuser[resource] then
+ destuser[resource]:send(stanza);
+ else
+ -- Bare JID, or resource offline
+ local best_session;
+ for resource, session in pairs(destuser.sessions) do
+ if not best_session then best_session = session;
+ elseif session.priority >= best_session.priority and session.priority >= 0 then
+ best_session = session;
+ end
+ end
+ if not best_session then
+ offlinemessage.new(node, host, stanza);
+ else
+ print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
+ destuser[best_session]:send(stanza);
+ end
+ end
+ else
+ -- User is offline
+ offlinemessage.new(node, host, stanza);
+ end
+end
+
+function handle_stanza_presence_to_local_user(stanza)
+ local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
+ local destuser = hosts[host].sessions[node];
+ if destuser then
+ if resource then
+ if destuser[resource] then
+ destuser[resource]:send(stanza);
+ else
+ return;
+ end
+ else
+ -- Broadcast to all user's resources
+ for resource, session in pairs(destuser.sessions) do
+ session:send(stanza);
+ end
+ end
+ end
+end
+
+function handle_stanza_iq_to_local_user(stanza)
+
+end
+
+function foo()
+ local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
+ local destuser = hosts[host].sessions[node];
+ if destuser and destuser.sessions then
+ -- User online
+ if resource and destuser.sessions[resource] then
+ stanza.to:send(stanza);
+ else
+ --User is online, but specified resource isn't (or no resource specified)
+ local best_session;
+ for resource, session in pairs(destuser.sessions) do
+ if not best_session then best_session = session;
+ elseif session.priority >= best_session.priority and session.priority >= 0 then
+ best_session = session;
+ end
+ end
+ if not best_session then
+ offlinemessage.new(node, host, stanza);
+ else
+ print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
+ resource = best_session.resource;
+ end
+ end
+ if destuser.sessions[resource] == session then
+ log("warn", "core", "Attempt to send stanza to self, dropping...");
+ else
+ print("...sending...", tostring(stanza));
+ --destuser.sessions[resource].conn.write(tostring(data));
+ print(" to conn ", destuser.sessions[resource].conn);
+ destuser.sessions[resource].conn.write(tostring(stanza));
+ print("...sent")
+ end
+ elseif stanza.name == "message" then
+ print(" ...will be stored offline");
+ offlinemessage.new(node, host, stanza);
+ elseif stanza.name == "iq" then
+ print(" ...is an iq");
+ stanza.from:send(st.reply(stanza)
+ :tag("error", { type = "cancel" })
+ :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
+ end
+end
+
+-- Broadcast a presence stanza to all of a user's contacts
+function handle_stanza_presence_broadcast(session, stanza)
+ if session.roster then
+ local initial_presence = not session.last_presence;
+ session.last_presence = stanza;
+
+ -- Broadcast presence and probes
+ local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
+
+ for child in stanza:childtags() do
+ broadcast:add_child(child);
+ end
+ for contact_jid in pairs(session.roster) do
+ broadcast.attr.to = contact_jid;
+ send_to(contact_jid, broadcast);
+ if initial_presence then
+ local node, host = jid.split(contact_jid);
+ if hosts[host] and hosts[host].type == "local" then
+ local contact = hosts[host].sessions[node]
+ if contact then
+ local pres = st.presence { to = session.full_jid };
+ for resource, contact_session in pairs(contact.sessions) do
+ if contact_session.last_presence then
+ pres.tags = contact_session.last_presence.tags;
+ pres.attr.from = contact_session.full_jid;
+ send(pres);
+ end
+ end
+ end
+ --FIXME: Do we send unavailable if they are offline?
+ else
+ probe.attr.to = contact;
+ send_to(contact, probe);
+ end
+ end
+ end
+
+ -- Probe for our contacts' presence
+ end
+end
+
+-- Broadcast presence probes to all of a user's contacts
+function handle_stanza_presence_probe_broadcast(session, stanza)
+end
+
+--
+function handle_stanza_to_server(stanza)
+end
+
+function handle_stanza_iq_no_to(session, stanza)
+end
+]]
\ No newline at end of file