diff options
| -rw-r--r-- | core/stanza_router.lua | 228 |
1 files changed, 223 insertions, 5 deletions
diff --git a/core/stanza_router.lua b/core/stanza_router.lua index 2203f351..fe1c8754 100644 --- a/core/stanza_router.lua +++ b/core/stanza_router.lua @@ -1,3 +1,223 @@ +<<<<<<< local
+
+-- 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
+ -- TODO resend subscription requests
+ 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 @@ -93,6 +313,7 @@ function core_handle_stanza(origin, stanza) end end +-- TODO: Does this function belong here? function is_authorized_to_see_presence(origin, username, host) local roster = datamanager.load(username, host, "roster") or {}; local item = roster[origin.username.."@"..origin.host]; @@ -186,11 +407,7 @@ function core_route_stanza(origin, stanza) end else -- Remote host - if host_session then - -- Send to session - else - -- Need to establish the connection - end + send_s2s(origin.host, host, stanza); end stanza.attr.to = to; -- reset end @@ -198,3 +415,4 @@ end function handle_stanza_toremote(stanza) log("error", "Stanza bound for remote host, but s2s is not implemented"); end +>>>>>>> other
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