-
--- 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_s2s = require "core.s2smanager".send_to_host;
-local user_exists = require "core.usermanager".user_exists;
-
-local rostermanager = require "core.rostermanager";
-local sessionmanager = require "core.sessionmanager";
-local offlinemanager = require "core.offlinemanager";
-
-local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
-local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
-
-local modules_handle_stanza = require "core.modulemanager".handle_stanza;
-local component_handle_stanza = require "core.componentmanager".handle_stanza;
+local jid_split = require "util.jid".split;
+local jid_prepped_split = require "util.jid".prepped_split;
-local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
-local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
+local full_sessions = _G.prosody.full_sessions;
+local bare_sessions = _G.prosody.bare_sessions;
-local format = string.format;
-local tostring = tostring;
-local t_concat = table.concat;
-local t_insert = table.insert;
-local tonumber = tonumber;
-local s_find = string.find;
-
-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)
- (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:pretty_print()) --top_tag())
+ (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
- if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
-- 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
- -- TODO also, stanzas should be returned to their original state before the function ends
- if origin.type == "c2s" then
+ -- TODO also, stanzas should be returned to their original state before the function ends
stanza.attr.from = origin.full_jid;
end
- 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, xmlns = stanza.attr.to, stanza.attr.xmlns;
local from = stanza.attr.from;
- local from_node, from_host, from_resource = jid_split(from);
- local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
-
- if origin.type == "s2sin" then
- if origin.from_host ~= from_host then -- remote server trying to impersonate some other server?
- log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from, origin.from_host);
- return; -- FIXME what should we do here? does this work with subdomains?
+ 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
- -- FIXME do stanzas not of jabber:client get handled by components?
- if origin.type == "s2sin" or origin.type == "c2s" then
- if not to then
- core_handle_stanza(origin, stanza);
- elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
- core_handle_stanza(origin, stanza);
- elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
- modules_handle_stanza(origin, stanza);
- elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
- component_handle_stanza(origin, stanza);
- elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
- component_handle_stanza(origin, stanza);
- elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
- component_handle_stanza(origin, stanza);
- elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
- handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
- elseif origin.type ~= "c2s" and stanza.name == "iq" and not resource then -- directed at bare JID
- core_handle_stanza(origin, stanza);
- else
- core_route_stanza(origin, stanza);
+ 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
- core_handle_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 modules_handle_stanza(origin, stanza) then return; end
- 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 stanza.attr.type == nil and not origin.presence then -- 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 available resources
- if res ~= origin and res.presence then
- res.presence.attr.to = origin.full_jid;
- core_route_stanza(res, res.presence);
- res.presence.attr.to = nil;
- end
- end
- if origin.roster.pending then -- resend incoming subscription requests
- for jid in pairs(origin.roster.pending) do
- origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original?
- end
- end
- local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host});
- for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests
- if item.ask then
- request.attr.to = jid;
- core_route_stanza(origin, request);
- end
- end
- for _, msg in ipairs(offlinemanager.load(node, host) or {}) do
- origin.send(msg); -- FIXME do we need to modify to/from in any way?
- end
- offlinemanager.deleteAll(node, host);
- end
- origin.priority = 0;
- if stanza.attr.type == "unavailable" then
- origin.presence = nil;
+ 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
- origin.presence = stanza;
- local priority = stanza:child_with_name("priority");
- if priority and #priority > 0 then
- priority = t_concat(priority);
- if s_find(priority, "^[+-]?[0-9]+$") then
- priority = tonumber(priority);
- if priority < -128 then priority = -128 end
- if priority > 127 then priority = 127 end
- origin.priority = priority;
- end
- end
+ event = "stanza/"..stanza.name;
end
- stanza.attr.to = nil; -- reset it
else
- log("warn", "Unhandled c2s presence: %s", tostring(stanza));
- if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" then
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
- end
+ 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
- log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
- if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
+ to_type = '/bare';
+ if node == origin.username and host == origin.host then
+ stanza.attr.to = nil;
+ to_self = true;
end
- end -- TODO handle other stanzas
+ end
else
- log("warn", "Unhandled origin: %s", origin.type);
- if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
- -- s2s stanzas can get here
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
+ 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)
- -- Hooks
- --- ...later
-
- -- Deliver
- local to = stanza.attr.to;
- local node, host, resource = jid_split(to);
- local to_bare = node and (node.."@"..host) or host; -- bare JID
- local from = stanza.attr.from;
- local from_node, from_host, from_resource = jid_split(from);
- local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
+ 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 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
- handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
- else -- sender is available or unavailable
- for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
- if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
- stanza.attr.to = session.full_jid; -- reset at the end of function
- session.send(stanza);
- end
- end
- end
- elseif stanza.name == "message" then -- select a resource to recieve message
- local priority = 0;
- local recipients = {};
- for _, session in pairs(user.sessions) do -- find resource with greatest priority
- local p = session.priority;
- if p > priority then
- priority = p;
- recipients = {session};
- elseif p == priority then
- t_insert(recipients, session);
- end
- end
- local count = 0;
- for _, session in pairs(recipients) do
- session.send(stanza);
- count = count + 1;
- end
- if count == 0 then
- offlinemanager.store(node, host, stanza);
- -- TODO deal with storage errors
- end
- else
- -- TODO send IQ error
- end
- else
- -- User + resource is online...
- stanza.attr.to = res.full_jid; -- reset at the end of function
- res.send(stanza); -- Yay \o/
- end
- else
- -- user not online
- if user_exists(node, host) then
- if stanza.name == "presence" then
- if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
- handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
- else
- -- TODO send unavailable presence or unsubscribed
- end
- elseif stanza.name == "message" then
- if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
- offlinemanager.store(node, host, stanza);
- -- FIXME don't store messages with only chat state notifications
- end
- -- TODO allow configuration of offline storage
- -- TODO send error if not storing offline
- 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
- origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
- end
- -- else ignore
- else
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
- end
- end
- end
+ if hosts[host] then
+ -- old stanza routing code removed
+ core_post_stanza(origin, stanza);
elseif origin.type == "c2s" then
-- Remote host
- local xmlns = stanza.attr.xmlns;
- --stanza.attr.xmlns = "jabber:server";
- stanza.attr.xmlns = nil;
- log("debug", "sending s2s stanza: %s", tostring(stanza));
- send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
- stanza.attr.xmlns = xmlns; -- reset
+ 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", origin.host, host);
- send_s2s(origin.host, host, stanza);
+ log("debug", "Routing outgoing stanza for %s to %s", from_host, host);
+ send_s2s(from_host, host, stanza);
else
- log("warn", "received stanza from unhandled connection type: %s", origin.type);
+ log("warn", "received %s stanza from unhandled connection type: %s", tostring(stanza.name), tostring(origin.type));
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
-
-
projects / prosody.git / blobdiff