diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/stanza_router.lua | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/core/stanza_router.lua b/core/stanza_router.lua index 4b6ca68c..fe1c8754 100644 --- a/core/stanza_router.lua +++ b/core/stanza_router.lua @@ -1,3 +1,4 @@ +<<<<<<< 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
@@ -216,3 +217,202 @@ 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 = print; + +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 + if res.full_jid then + res = user.sessions[k]; + break; + 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 + +-- 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]; + 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 == "probe" 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 == "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 + else + 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 + send_s2s(origin.host, host, stanza); + 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 +>>>>>>> other
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