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292 lines
9.5 KiB
292 lines
9.5 KiB
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-- The code in this file should be self-explanatory, though the logic is horrible
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-- for more info on that, see doc/stanza_routing.txt, which attempts to condense
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-- the rules from the RFCs (mainly 3921)
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require "core.servermanager"
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local log = require "util.logger".init("stanzarouter")
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require "util.jid"
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local jid_split = jid.split;
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function core_process_stanza(origin, stanza)
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log("debug", "Received: "..tostring(stanza))
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local to = stanza.attr.to;
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if not to or (hosts[to] and hosts[to].type == "local") then
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core_handle_stanza(origin, stanza);
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elseif origin.type == "c2s" then
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core_route_stanza(origin, stanza);
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end
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end
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function core_handle_stanza(origin, stanza)
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-- Handlers
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if origin.type == "c2s" or origin.type == "c2s_unauthed" then
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local session = origin;
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stanza.attr.from = session.full_jid;
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log("debug", "Routing stanza");
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-- Stanza has no to attribute
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--local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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--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
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-- Stanza is to this server, or a user on this server
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log("debug", "Routing stanza to local");
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handle_stanza(session, stanza);
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end
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end
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function core_route_stanza(origin, stanza)
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-- Hooks
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-- Deliver
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end
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function handle_stanza_nodest(stanza)
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if stanza.name == "iq" then
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handle_stanza_iq_no_to(session, stanza);
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elseif stanza.name == "presence" then
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-- Broadcast to this user's contacts
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handle_stanza_presence_broadcast(session, stanza);
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-- also, if it is initial presence, send out presence probes
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if not session.last_presence then
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handle_stanza_presence_probe_broadcast(session, stanza);
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end
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session.last_presence = stanza;
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elseif stanza.name == "message" then
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-- Treat as if message was sent to bare JID of the sender
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handle_stanza_to_local_user(stanza);
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end
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end
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function handle_stanza_tolocal(stanza)
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local node, host, resource = jid.split(stanza.attr.to);
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if host and hosts[host] and hosts[host].type == "local" then
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-- Is a local host, handle internally
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if node then
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-- Is a local user, send to their session
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log("debug", "Routing stanza to %s@%s", node, host);
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if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
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handle_stanza_to_local_user(stanza);
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else
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-- Is sent to this server, let's handle it...
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log("debug", "Routing stanza to %s", host);
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handle_stanza_to_server(stanza, session);
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end
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end
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end
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function handle_stanza_toremote(stanza)
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log("error", "Stanza bound for remote host, but s2s is not implemented");
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end
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--[[
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local function route_c2s_stanza(session, stanza)
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stanza.attr.from = session.full_jid;
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if not stanza.attr.to and session.username then
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-- Has no 'to' attribute, handle internally
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if stanza.name == "iq" then
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handle_stanza_iq_no_to(session, stanza);
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elseif stanza.name == "presence" then
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-- Broadcast to this user's contacts
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handle_stanza_presence_broadcast(session, stanza);
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-- also, if it is initial presence, send out presence probes
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if not session.last_presence then
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handle_stanza_presence_probe_broadcast(session, stanza);
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end
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session.last_presence = stanza;
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elseif stanza.name == "message" then
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-- Treat as if message was sent to bare JID of the sender
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handle_stanza_to_local_user(stanza);
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end
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end
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local node, host, resource = jid.split(stanza.attr.to);
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if host and hosts[host] and hosts[host].type == "local" then
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-- Is a local host, handle internally
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if node then
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-- Is a local user, send to their session
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if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
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handle_stanza_to_local_user(stanza);
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else
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-- Is sent to this server, let's handle it...
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handle_stanza_to_server(stanza, session);
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end
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else
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-- Is not for us or a local user, route accordingly
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route_s2s_stanza(stanza);
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end
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end
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function handle_stanza_no_to(session, stanza)
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if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
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local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns);
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if stanza.attr.type == "get" or stanza.attr.type == "set" then
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if iq_handlers[xmlns] then
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if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it
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end
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-- Oh, handler didn't handle it. Need to send service-unavailable now.
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log("warn", "Unhandled namespace: "..xmlns);
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session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
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return; -- All done!
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end
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end
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function handle_stanza_to_local_user(stanza)
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if stanza.name == "message" then
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handle_stanza_message_to_local_user(stanza);
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elseif stanza.name == "presence" then
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handle_stanza_presence_to_local_user(stanza);
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elseif stanza.name == "iq" then
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handle_stanza_iq_to_local_user(stanza);
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end
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end
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function handle_stanza_message_to_local_user(stanza)
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local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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local destuser = hosts[host].sessions[node];
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if destuser then
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if resource and destuser[resource] then
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destuser[resource]:send(stanza);
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else
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-- Bare JID, or resource offline
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local best_session;
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for resource, session in pairs(destuser.sessions) do
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if not best_session then best_session = session;
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elseif session.priority >= best_session.priority and session.priority >= 0 then
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best_session = session;
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end
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end
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if not best_session then
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offlinemessage.new(node, host, stanza);
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else
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print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
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destuser[best_session]:send(stanza);
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end
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end
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else
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-- User is offline
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offlinemessage.new(node, host, stanza);
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end
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end
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function handle_stanza_presence_to_local_user(stanza)
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local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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local destuser = hosts[host].sessions[node];
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if destuser then
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if resource then
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if destuser[resource] then
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destuser[resource]:send(stanza);
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else
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return;
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end
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else
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-- Broadcast to all user's resources
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for resource, session in pairs(destuser.sessions) do
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session:send(stanza);
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end
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end
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end
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end
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function handle_stanza_iq_to_local_user(stanza)
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end
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function foo()
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local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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local destuser = hosts[host].sessions[node];
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if destuser and destuser.sessions then
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-- User online
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if resource and destuser.sessions[resource] then
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stanza.to:send(stanza);
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else
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--User is online, but specified resource isn't (or no resource specified)
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local best_session;
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for resource, session in pairs(destuser.sessions) do
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if not best_session then best_session = session;
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elseif session.priority >= best_session.priority and session.priority >= 0 then
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best_session = session;
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end
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end
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if not best_session then
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offlinemessage.new(node, host, stanza);
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else
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print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
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resource = best_session.resource;
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end
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end
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if destuser.sessions[resource] == session then
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log("warn", "core", "Attempt to send stanza to self, dropping...");
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else
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print("...sending...", tostring(stanza));
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--destuser.sessions[resource].conn.write(tostring(data));
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print(" to conn ", destuser.sessions[resource].conn);
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destuser.sessions[resource].conn.write(tostring(stanza));
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print("...sent")
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end
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elseif stanza.name == "message" then
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print(" ...will be stored offline");
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offlinemessage.new(node, host, stanza);
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elseif stanza.name == "iq" then
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print(" ...is an iq");
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stanza.from:send(st.reply(stanza)
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:tag("error", { type = "cancel" })
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:tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
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end
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end
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-- Broadcast a presence stanza to all of a user's contacts
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function handle_stanza_presence_broadcast(session, stanza)
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if session.roster then
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local initial_presence = not session.last_presence;
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session.last_presence = stanza;
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-- Broadcast presence and probes
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local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
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for child in stanza:childtags() do
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broadcast:add_child(child);
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end
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for contact_jid in pairs(session.roster) do
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broadcast.attr.to = contact_jid;
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send_to(contact_jid, broadcast);
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if initial_presence then
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local node, host = jid.split(contact_jid);
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if hosts[host] and hosts[host].type == "local" then
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local contact = hosts[host].sessions[node]
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if contact then
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local pres = st.presence { to = session.full_jid };
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for resource, contact_session in pairs(contact.sessions) do
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if contact_session.last_presence then
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pres.tags = contact_session.last_presence.tags;
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pres.attr.from = contact_session.full_jid;
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send(pres);
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end
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end
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end
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--FIXME: Do we send unavailable if they are offline?
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else
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probe.attr.to = contact;
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send_to(contact, probe);
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end
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end
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end
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-- Probe for our contacts' presence
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end
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end
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-- Broadcast presence probes to all of a user's contacts
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function handle_stanza_presence_probe_broadcast(session, stanza)
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end
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--
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function handle_stanza_to_server(stanza)
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end
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function handle_stanza_iq_no_to(session, stanza)
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end
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]] |