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-- 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 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 and origin.send 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 or stanza: %s; xmlns=%s: %s", origin.type, stanza.name, xmlns, tostring(stanza)); -- we didn't handle it
origin:close("unsupported-stanza-type");
end
end
local iq_types = { set=true, get=true, result=true, error=true };
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 not iq_types[stanza.attr.type] or ((stanza.attr.type == "set" or stanza.attr.type == "get") and (#stanza.tags ~= 1)) then
origin.send(st.error_reply(stanza, "modify", "bad-request", "Invalid IQ type or incorrect number of children"));
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 (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);
origin:close("not-authorized");
return;
elseif not hosts[host] then
log("warn", "Remote server %s sent us a stanza for %s, closing stream", origin.from_host, host);
origin:close("host-unknown");
return;
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);
else
log("debug", "Routing to remote...");
local host_session = hosts[from_host];
if not host_session then
log("error", "No hosts[from_host] (please report): %s", tostring(stanza));
else
local xmlns = stanza.attr.xmlns;
stanza.attr.xmlns = nil;
local routed = host_session.events.fire_event("route/remote", { origin = origin, stanza = stanza, from_host = from_host, to_host = host });
stanza.attr.xmlns = xmlns; -- reset
if not routed then
core_route_stanza(host_session, st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote domains is not enabled"));
end
end
end
end
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