-
--- 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
-
-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
- 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
+\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
+ 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
projects / prosody.git / blobdiff