-
--- 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"
+-- 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 = 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 jid_prepped_split = require "util.jid".prepped_split;
-local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
-local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
-local format = string.format;
-local tostring = tostring;
+local full_sessions = _G.prosody.full_sessions;
+local bare_sessions = _G.prosody.bare_sessions;
-local jid_split = require "util.jid".split;
-local print = print;
+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)
- log("debug", "Received: "..tostring(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.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 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then
- error("Invalid IQ");
+ 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 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
+ 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
- local to = stanza.attr.to;
- -- TODO also, stazas should be returned to their original state before the function ends
- if origin.type == "c2s" then
- stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)
+ -- TODO also, stanzas should be returned to their original state before the function ends
+ stanza.attr.from = origin.full_jid;
end
-
- 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" or origin.type == "s2sin" 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 == "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 ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence
- stanza.attr.to = res.full_jid;
- core_route_stanza(origin, stanza);
- 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 -- probe all contacts we are subscribed to
- local subscription = origin.roster[jid].subscription;
- if subscription == "both" or subscription == "to" then
- probe.attr.to = jid;
- core_route_stanza(origin, probe);
- end
- end
- for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all resources
- if res ~= origin and stanza.attr.type ~= "unavailable" and res.presence then -- FIXME does unavailable qualify as initial presence?
- res.presence.attr.to = origin.full_jid;
- core_route_stanza(res, res.presence);
- res.presence.attr.to = nil;
- end
- end
- -- TODO resend subscription requests
+ 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
- origin.presence = stanza;
- stanza.attr.to = nil; -- reset it
- else
- -- TODO error, bad type
+ return;
end
- else
- log("debug", "Routing stanza to local");
- handle_stanza(session, stanza);
+ 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
- elseif origin.type == "s2sin_unauthed" or origin.type == "s2sin" then
- if stanza.attr.xmlns == "jabber:server:dialback" then
- if stanza.name == "verify" then
- -- We are being asked to verify the key, to ensure it was generated by us
- log("debug", "verifying dialback key...");
- local attr = stanza.attr;
- print(tostring(attr.to), tostring(attr.from))
- print(tostring(origin.to_host), tostring(origin.from_host))
- -- FIXME: Grr, ejabberd breaks this one too?? it is black and white in XEP-220 example 34
- --if attr.from ~= origin.to_host then error("invalid-from"); end
- local type = "invalid";
- if s2s_verify_dialback(attr.id, attr.from, attr.to, stanza[1]) then
- type = "valid"
- end
- origin.send(format("<db:verify from='%s' to='%s' id='%s' type='%s'>%s</db:verify>", attr.to, attr.from, attr.id, type, stanza[1]));
- elseif stanza.name == "result" and origin.type == "s2sin_unauthed" then
- -- he wants to be identified through dialback
- -- We need to check the key with the Authoritative server
- local attr = stanza.attr;
- origin.from_host = attr.from;
- origin.to_host = attr.to;
- origin.dialback_key = stanza[1];
- log("debug", "asking %s if key %s belongs to them", attr.from, stanza[1]);
- send_s2s(attr.to, attr.from, format("<db:verify from='%s' to='%s' id='%s'>%s</db:verify>", attr.to, attr.from, origin.streamid, stanza[1]));
- hosts[attr.from].dialback_verifying = origin;
+ 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
- elseif origin.type == "s2sout_unauthed" or origin.type == "s2sout" then
- if stanza.attr.xmlns == "jabber:server:dialback" then
- if stanza.name == "result" then
- if stanza.attr.type == "valid" then
- s2s_make_authenticated(origin);
- else
- -- FIXME
- error("dialback failed!");
- end
- elseif stanza.name == "verify" and origin.dialback_verifying then
- local valid;
- local attr = stanza.attr;
- if attr.type == "valid" then
- s2s_make_authenticated(origin.dialback_verifying);
- valid = "valid";
+ 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
- -- Warn the original connection that is was not verified successfully
- log("warn", "dialback for "..(origin.dialback_verifying.from_host or "(unknown)").." failed");
- valid = "invalid";
+ event = "stanza/"..stanza.name;
end
- origin.dialback_verifying.send(format("<db:result from='%s' to='%s' id='%s' type='%s'>%s</db:result>", attr.from, attr.to, attr.id, valid, origin.dialback_verifying.dialback_key));
+ else
+ event = "stanza/"..xmlns..":"..stanza.name;
end
+ if h.events.fire_event(event, {origin = origin, stanza = stanza}) then return; end
end
- else
- log("warn", "Unhandled origin: %s", origin.type);
+ 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 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
+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
- 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
+ local to_type, to_self;
+ if node then
+ if resource then
+ to_type = '/full';
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 = stanza.attr.to, to = stanza.attr.from, type = "unsubscribed"}));
- end
- -- else ignore
- else
- send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));
- end
+ to_type = '/bare';
+ if node == origin.username and host == origin.host then
+ stanza.attr.to = nil;
+ to_self = true;
end
end
- elseif origin.type == "c2s" then
- -- Remote host
- --stanza.attr.xmlns = "jabber:server";
- stanza.attr.xmlns = nil;
- log("debug", "sending s2s stanza: %s", tostring(stanza));
- send_s2s(origin.host, host, stanza);
else
- log("warn", "received stanza from unhandled connection type: %s", origin.type);
+ 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
- stanza.attr.to = to; -- reset
end
-function handle_stanza_toremote(stanza)
- log("error", "Stanza bound for remote host, but s2s is not implemented");
+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