-\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
+-- Prosody IM
+-- Copyright (C) 2008-2010 Matthew Wild
+-- Copyright (C) 2008-2010 Waqas Hussain
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local log = require "util.logger".init("stanzarouter")
+
+local hosts = _G.prosody.hosts;
+local tostring = tostring;
+local st = require "util.stanza";
+local send_s2s = require "core.s2smanager".send_to_host;
+local jid_split = require "util.jid".split;
+local jid_prepped_split = require "util.jid".prepped_split;
+
+local full_sessions = _G.prosody.full_sessions;
+local bare_sessions = _G.prosody.bare_sessions;
+
+local function handle_unhandled_stanza(host, origin, stanza)
+ local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns or "jabber:client", origin.type;
+ if name == "iq" and xmlns == "jabber:client" then
+ if stanza.attr.type == "get" or stanza.attr.type == "set" then
+ xmlns = stanza.tags[1].attr.xmlns or "jabber:client";
+ log("debug", "Stanza of type %s from %s has xmlns: %s", name, origin_type, xmlns);
+ else
+ log("debug", "Discarding %s from %s of type: %s", name, origin_type, stanza.attr.type);
+ return true;
+ end
+ end
+ if stanza.attr.xmlns == nil then
+ log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin.type, stanza.name, xmlns); -- we didn't handle it
+ if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
+ origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
+ end
+ elseif not((name == "features" or name == "error") and xmlns == "http://etherx.jabber.org/streams") then -- FIXME remove check once we handle S2S features
+ log("warn", "Unhandled %s stream element: %s; xmlns=%s: %s", origin.type, stanza.name, xmlns, tostring(stanza)); -- we didn't handle it
+ origin:close("unsupported-stanza-type");
+ end
+end
+
+function core_process_stanza(origin, stanza)
+ (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
+
+ -- TODO verify validity of stanza (as well as JID validity)
+ if stanza.attr.type == "error" and #stanza.tags == 0 then return; end -- TODO invalid stanza, log
+ if stanza.name == "iq" then
+ if not stanza.attr.id then stanza.attr.id = ""; end -- COMPAT Jabiru doesn't send the id attribute on roster requests
+ if (stanza.attr.type == "set" or stanza.attr.type == "get") and (#stanza.tags ~= 1) then
+ origin.send(st.error_reply(stanza, "modify", "bad-request"));
+ return;
+ end
+ end
+
+ if origin.type == "c2s" and not stanza.attr.xmlns then
+ if not origin.full_jid
+ and not(stanza.name == "iq" and stanza.attr.type == "set" and stanza.tags[1] and stanza.tags[1].name == "bind"
+ and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
+ -- authenticated client isn't bound and current stanza is not a bind request
+ if stanza.attr.type ~= "result" and stanza.attr.type ~= "error" then
+ origin.send(st.error_reply(stanza, "auth", "not-authorized")); -- FIXME maybe allow stanzas to account or server
+ end
+ return;
+ end
+
+ -- TODO also, stanzas should be returned to their original state before the function ends
+ stanza.attr.from = origin.full_jid;
+ end
+ local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
+ local from = stanza.attr.from;
+ local node, host, resource;
+ local from_node, from_host, from_resource;
+ local to_bare, from_bare;
+ if to then
+ if full_sessions[to] or bare_sessions[to] or hosts[to] then
+ node, host = jid_split(to); -- TODO only the host is needed, optimize
+ else
+ node, host, resource = jid_prepped_split(to);
+ if not host then
+ log("warn", "Received stanza with invalid destination JID: %s", to);
+ if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
+ origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The destination address is invalid: "..to));
+ end
+ return;
+ end
+ to_bare = node and (node.."@"..host) or host; -- bare JID
+ if resource then to = to_bare.."/"..resource; else to = to_bare; end
+ stanza.attr.to = to;
+ end
+ end
+ if from and not origin.full_jid then
+ -- We only stamp the 'from' on c2s stanzas, so we still need to check validity
+ from_node, from_host, from_resource = jid_prepped_split(from);
+ if not from_host then
+ log("warn", "Received stanza with invalid source JID: %s", from);
+ if stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
+ origin.send(st.error_reply(stanza, "modify", "jid-malformed", "The source address is invalid: "..from));
+ end
+ return;
+ end
+ from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
+ if from_resource then from = from_bare.."/"..from_resource; else from = from_bare; end
+ stanza.attr.from = from;
+ end
+
+ --[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
+ log("warn", "stanza recieved for a non-local server");
+ return; -- FIXME what should we do here?
+ end]] -- FIXME
+
+ if (origin.type == "s2sin" or origin.type == "c2s" or origin.type == "component") and xmlns == nil then
+ if origin.type == "s2sin" and not origin.dummy then
+ local host_status = origin.hosts[from_host];
+ if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
+ log("warn", "Received a stanza claiming to be from %s, over a stream authed for %s!", from_host, origin.from_host);
+ return; -- FIXME what should we do here? does this work with subdomains?
+ end
+ end
+ core_post_stanza(origin, stanza, origin.full_jid);
+ else
+ local h = hosts[stanza.attr.to or origin.host or origin.to_host];
+ if h then
+ local event;
+ if xmlns == nil then
+ if stanza.name == "iq" and (stanza.attr.type == "set" or stanza.attr.type == "get") then
+ event = "stanza/iq/"..stanza.tags[1].attr.xmlns..":"..stanza.tags[1].name;
+ else
+ event = "stanza/"..stanza.name;
+ end
+ else
+ event = "stanza/"..xmlns..":"..stanza.name;
+ end
+ if h.events.fire_event(event, {origin = origin, stanza = stanza}) then return; end
+ end
+ if host and not hosts[host] then host = nil; end -- COMPAT: workaround for a Pidgin bug which sets 'to' to the SRV result
+ handle_unhandled_stanza(host or origin.host or origin.to_host, origin, stanza);
+ end
+end
+
+function core_post_stanza(origin, stanza, preevents)
+ local to = stanza.attr.to;
+ local node, host, resource = jid_split(to);
+ local to_bare = node and (node.."@"..host) or host; -- bare JID
+
+ local to_type, to_self;
+ if node then
+ if resource then
+ to_type = '/full';
+ else
+ to_type = '/bare';
+ if node == origin.username and host == origin.host then
+ stanza.attr.to = nil;
+ to_self = true;
+ end
+ end
+ else
+ if host then
+ to_type = '/host';
+ else
+ to_type = '/bare';
+ to_self = true;
+ end
+ end
+
+ local event_data = {origin=origin, stanza=stanza};
+ if preevents then -- c2s connection
+ if hosts[origin.host].events.fire_event('pre-'..stanza.name..to_type, event_data) then return; end -- do preprocessing
+ end
+ local h = hosts[to_bare] or hosts[host or origin.host];
+ if h then
+ if h.events.fire_event(stanza.name..to_type, event_data) then return; end -- do processing
+ if to_self and h.events.fire_event(stanza.name..'/self', event_data) then return; end -- do processing
+ handle_unhandled_stanza(h.host, origin, stanza);
+ else
+ core_route_stanza(origin, stanza);
+ end
+end
+
+function core_route_stanza(origin, stanza)
+ local node, host, resource = jid_split(stanza.attr.to);
+ local from_node, from_host, from_resource = jid_split(stanza.attr.from);
+
+ -- Auto-detect origin if not specified
+ origin = origin or hosts[from_host];
+ if not origin then return false; end
+
+ if hosts[host] then
+ -- old stanza routing code removed
+ core_post_stanza(origin, stanza);
+ elseif origin.type == "c2s" then
+ -- Remote host
+ if not hosts[from_host] then
+ log("error", "No hosts[from_host] (please report): %s", tostring(stanza));
+ end
+ if (not hosts[from_host]) or (not hosts[from_host].disallow_s2s) then
+ local xmlns = stanza.attr.xmlns;
+ --stanza.attr.xmlns = "jabber:server";
+ stanza.attr.xmlns = nil;
+ log("debug", "sending s2s stanza: %s", tostring(stanza.top_tag and stanza:top_tag()) or stanza);
+ send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
+ stanza.attr.xmlns = xmlns; -- reset
+ else
+ core_route_stanza(hosts[from_host], st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote servers is not allowed"));
+ end
+ elseif origin.type == "component" or origin.type == "local" then
+ -- Route via s2s for components and modules
+ log("debug", "Routing outgoing stanza for %s to %s", from_host, host);
+ send_s2s(from_host, host, stanza);
+ else
+ log("warn", "received %s stanza from unhandled connection type: %s", tostring(stanza.name), tostring(origin.type));
+ end
+end
projects / prosody.git / blobdiff