-<<<<<<< local\r
-\r
--- The code in this file should be self-explanatory, though the logic is horrible\r
--- for more info on that, see doc/stanza_routing.txt, which attempts to condense\r
--- the rules from the RFCs (mainly 3921)\r
-\r
-require "core.servermanager"\r
-\r
-local log = require "util.logger".init("stanzarouter")\r
-\r
-local st = require "util.stanza";\r
-local send = require "core.sessionmanager".send_to_session;\r
--- local send_s2s = require "core.s2smanager".send_to_host;\r
-local user_exists = require "core.usermanager".user_exists;\r
-\r
-local jid_split = require "util.jid".split;\r
-local print, debug = print, debug;\r
-\r
-function core_process_stanza(origin, stanza)\r
- log("debug", "Received: "..tostring(stanza))\r
- -- TODO verify validity of stanza (as well as JID validity)\r
- if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then\r
- if stanza.attr.type == "set" or stanza.attr.type == "get" then\r
- error("Invalid IQ");\r
- elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then\r
- error("Invalid IQ");\r
- end\r
- end\r
-\r
- if origin.type == "c2s" and not origin.full_jid\r
- and not(stanza.name == "iq" and stanza.tags[1].name == "bind"\r
- and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then\r
- error("Client MUST bind resource after auth");\r
- end\r
-\r
- local to = stanza.attr.to;\r
- stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)\r
- -- TODO also, stazas should be returned to their original state before the function ends\r
- \r
- -- TODO presence subscriptions\r
- if not to then\r
- core_handle_stanza(origin, stanza);\r
- elseif hosts[to] and hosts[to].type == "local" then\r
- core_handle_stanza(origin, stanza);\r
- elseif stanza.name == "iq" and not select(3, jid_split(to)) then\r
- core_handle_stanza(origin, stanza);\r
- elseif origin.type == "c2s" then\r
- core_route_stanza(origin, stanza);\r
- end\r
-end\r
-\r
--- This function handles stanzas which are not routed any further,\r
--- that is, they are handled by this server\r
-function core_handle_stanza(origin, stanza)\r
- -- Handlers\r
- if origin.type == "c2s" or origin.type == "c2s_unauthed" then\r
- local session = origin;\r
- \r
- if stanza.name == "presence" and origin.roster then\r
- if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then\r
- for jid in pairs(origin.roster) do -- broadcast to all interested contacts\r
- local subscription = origin.roster[jid].subscription;\r
- if subscription == "both" or subscription == "from" then\r
- stanza.attr.to = jid;\r
- core_route_stanza(origin, stanza);\r
- end\r
- end\r
- local node, host = jid_split(stanza.attr.from);\r
- for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources and from resources\r
- if res ~= origin then\r
- if res.full_jid then -- to resource. FIXME is this check correct? Maybe it should be res.presence\r
- stanza.attr.to = res.full_jid;\r
- core_route_stanza(origin, stanza);\r
- end\r
- if res.presence then -- from all resources for which we have presence\r
- res.presence.attr.to = origin.full_jid;\r
- core_route_stanza(res, res.presence);\r
- res.presence.attr.to = nil;\r
- end\r
- end\r
- end\r
- if not origin.presence then -- presence probes on initial presence\r
- local probe = st.presence({from = origin.full_jid, type = "probe"});\r
- for jid in pairs(origin.roster) do\r
- local subscription = origin.roster[jid].subscription;\r
- if subscription == "both" or subscription == "to" then\r
- probe.attr.to = jid;\r
- core_route_stanza(origin, probe);\r
- end\r
- end\r
- -- TODO resend subscription requests\r
- end\r
- origin.presence = stanza;\r
- stanza.attr.to = nil; -- reset it\r
- else\r
- -- TODO error, bad type\r
- end\r
- else\r
- log("debug", "Routing stanza to local");\r
- handle_stanza(session, stanza);\r
- end\r
- end\r
-end\r
-\r
-function is_authorized_to_see_presence(origin, username, host)\r
- local roster = datamanager.load(username, host, "roster") or {};\r
- local item = roster[origin.username.."@"..origin.host];\r
- return item and (item.subscription == "both" or item.subscription == "from");\r
-end\r
-\r
-function core_route_stanza(origin, stanza)\r
- -- Hooks\r
- --- ...later\r
- \r
- -- Deliver\r
- local to = stanza.attr.to;\r
- local node, host, resource = jid_split(to);\r
-\r
- if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end\r
-\r
- local host_session = hosts[host]\r
- if host_session and host_session.type == "local" then\r
- -- Local host\r
- local user = host_session.sessions[node];\r
- if user then\r
- local res = user.sessions[resource];\r
- if not res then\r
- -- if we get here, resource was not specified or was unavailable\r
- if stanza.name == "presence" then\r
- if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then\r
- if stanza.attr.type == "probe" then\r
- if is_authorized_to_see_presence(origin, node, host) then\r
- for k in pairs(user.sessions) do -- return presence for all resources\r
- if user.sessions[k].presence then\r
- local pres = user.sessions[k].presence;\r
- pres.attr.to = origin.full_jid;\r
- pres.attr.from = user.sessions[k].full_jid;\r
- send(origin, pres);\r
- pres.attr.to = nil;\r
- pres.attr.from = nil;\r
- end\r
- end\r
- else\r
- send(origin, st.presence({from=user.."@"..host, to=origin.username.."@"..origin.host, type="unsubscribed"}));\r
- end\r
- elseif stanza.attr.type == "subscribe" then\r
- -- TODO\r
- elseif stanza.attr.type == "unsubscribe" then\r
- -- TODO\r
- elseif stanza.attr.type == "subscribed" then\r
- -- TODO\r
- elseif stanza.attr.type == "unsubscribed" then\r
- -- TODO\r
- end -- discard any other type\r
- else -- sender is available or unavailable\r
- for k in pairs(user.sessions) do -- presence broadcast to all user resources\r
- if user.sessions[k].full_jid then\r
- stanza.attr.to = user.sessions[k].full_jid;\r
- send(user.sessions[k], stanza);\r
- end\r
- end\r
- end\r
- elseif stanza.name == "message" then -- select a resource to recieve message\r
- for k in pairs(user.sessions) do\r
- if user.sessions[k].full_jid then\r
- res = user.sessions[k];\r
- break;\r
- end\r
- end\r
- -- TODO find resource with greatest priority\r
- send(res, stanza);\r
- else\r
- -- TODO send IQ error\r
- end\r
- else\r
- -- User + resource is online...\r
- stanza.attr.to = res.full_jid;\r
- send(res, stanza); -- Yay \o/\r
- end\r
- else\r
- -- user not online\r
- if user_exists(node, host) then\r
- if stanza.name == "presence" then\r
- if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s?\r
- -- TODO send last recieved unavailable presence\r
- else\r
- -- TODO send unavailable presence\r
- end\r
- elseif stanza.name == "message" then\r
- -- TODO send message error, or store offline messages\r
- elseif stanza.name == "iq" then\r
- -- TODO send IQ error\r
- end\r
- else -- user does not exist\r
- -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?\r
- if stanza.name == "presence" then\r
- if stanza.attr.type == "probe" then\r
- send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"}));\r
- end\r
- -- else ignore\r
- else\r
- send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));\r
- end\r
- end\r
- end\r
- else\r
- -- Remote host\r
- if host_session then\r
- -- Send to session\r
- else\r
- -- Need to establish the connection\r
- end\r
- end\r
- stanza.attr.to = to; -- reset\r
-end\r
-\r
-function handle_stanza_toremote(stanza)\r
- log("error", "Stanza bound for remote host, but s2s is not implemented");\r
-end\r
-=======\r
-- 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
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];
end
else
-- Remote host
- send_s2s(origin.host, host, stanza);
+ 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
->>>>>>> other\r
projects / prosody.git / commitdiff