--- Prosody IM v0.4
--- Copyright (C) 2008-2009 Matthew Wild
--- Copyright (C) 2008-2009 Waqas Hussain
+-- 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.hosts;
-
-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 offlinemanager = require "core.offlinemanager";
-
-local modules_handle_stanza = require "core.modulemanager".handle_stanza;
-local component_handle_stanza = require "core.componentmanager".handle_stanza;
-
+local hosts = _G.prosody.hosts;
local tostring = tostring;
-local t_insert = table.insert;
-local pairs = pairs;
-local ipairs = ipairs;
-
+local st = require "util.stanza";
local jid_split = require "util.jid".split;
local jid_prepped_split = require "util.jid".prepped_split;
-local fire_event = prosody.events.fire_event;
-local select_best_resources;
+local full_sessions = _G.prosody.full_sessions;
+local bare_sessions = _G.prosody.bare_sessions;
-function core_process_stanza(origin, stanza)
- (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
+local core_post_stanza, core_process_stanza, core_route_stanza;
- -- Currently we guarantee every stanza to have an xmlns, should we keep this rule?
- if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end
-
- -- 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 (stanza.attr.type == "set" or stanza.attr.type == "get") and #stanza.tags ~= 1 then
- origin.send(st.error_reply(stanza, "modify", "bad-request"));
+function deprecated_warning(f)
+ _G[f] = function(...)
+ log("warn", "Using the global %s() is deprecated, use module:send() or prosody.%s(). %s", f, f, debug.traceback());
+ return prosody[f](...);
+ end
+end
+deprecated_warning"core_post_stanza";
+deprecated_warning"core_process_stanza";
+deprecated_warning"core_route_stanza";
+
+local valid_stanzas = { message = true, presence = true, iq = true };
+local function handle_unhandled_stanza(host, origin, stanza)
+ local name, xmlns, origin_type = stanza.name, stanza.attr.xmlns or "jabber:client", origin.type;
+ if xmlns == "jabber:client" and valid_stanzas[name] then
+ -- A normal stanza
+ local st_type = stanza.attr.type;
+ if st_type == "error" or (name == "iq" and st_type == "result") then
+ log("debug", "Discarding %s from %s of type: %s", name, origin_type, st_type or '<nil>');
return;
end
+ if name == "iq" and (st_type == "get" or st_type == "set") and stanza.tags[1] then
+ xmlns = stanza.tags[1].attr.xmlns or "jabber:client";
+ end
+ log("debug", "Unhandled %s stanza: %s; xmlns=%s", origin_type, name, xmlns);
+ if origin.send 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, 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())
+
+ if origin.type == "c2s" and not stanza.attr.xmlns then
+ local name, st_type = stanza.name, stanza.attr.type;
+ if st_type == "error" and #stanza.tags == 0 then
+ return handle_unhandled_stanza(origin.host, origin, stanza);
+ end
+ if 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[st_type] or ((st_type == "set" or st_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" 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 not(name == "iq" and st_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
- origin.send(st.error_reply(stanza, "auth", "not-authorized")); -- FIXME maybe allow stanzas to account or server
+ 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 from_node, from_host, from_resource;
local to_bare, from_bare;
if to then
- 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));
+ 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
- return;
+ 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
- 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
- if from then
+ 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
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 == "jabber:client" then
+ 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?
+ 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);
+ 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 stanza.attr.xmlns == "jabber:client" then
+ 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/"..stanza.attr.xmlns..":"..stanza.name;
+ 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 -- workaround for a Pidgin bug which sets 'to' to the SRV result
- modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
+ 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)
+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;
+ local to_type, to_self;
if node then
if resource then
to_type = '/full';
to_type = '/bare';
if node == origin.username and host == origin.host then
stanza.attr.to = nil;
+ to_self = true;
end
end
else
to_type = '/host';
else
to_type = '/bare';
+ to_self = true;
end
end
local event_data = {origin=origin, stanza=stanza};
- if origin.full_jid then -- c2s connection
+ 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.type == "component" then
- component_handle_stanza(origin, stanza);
- return;
- else
- if h.events.fire_event(stanza.name..to_type, event_data) then return; end -- do processing
- end
- end
-
- if host and fire_event(host.."/"..stanza.name, event_data) then
- -- event handled
- elseif stanza.name == "presence" and origin.host and fire_event(origin.host.."/"..stanza.name, event_data) then
- -- event handled
- elseif not to then
- modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
- elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
- modules_handle_stanza(host or origin.host or origin.to_host, 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[host] and hosts[host].type == "component" then -- directed at a component
- component_handle_stanza(origin, stanza);
- elseif hosts[host] and hosts[host].type == "local" and stanza.name == "iq" and not resource then -- directed at bare JID
- modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
+ 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 hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
- return component_handle_stanza(origin, stanza);
- elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
- return component_handle_stanza(origin, stanza);
- end
-
- if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" and stanza.attr.type ~= "error") 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 res then -- resource is online...
- res.send(stanza); -- Yay \o/
- else
- -- 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" and stanza.attr.type ~= "error" then
- -- inbound presence subscriptions and probes, already handled, so should never get here
- elseif not resource then -- sender is available or unavailable or error
- 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
- stanza.attr.to = to_bare;
- if stanza.attr.type == 'headline' then
- for _, session in pairs(user.sessions) do -- find resource with greatest priority
- if session.presence and session.priority >= 0 then
- session.send(stanza);
- end
- end
- elseif stanza.attr.type == 'groupchat' then
- -- Groupchat message sent to offline resource
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
- else
- local count = 0;
- for _, session in ipairs(select_best_resources(user)) do
- session.send(stanza);
- count = count + 1;
- end
- if count == 0 and (stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type) then
- offlinemanager.store(node, host, stanza);
- -- TODO deal with storage errors
- end
- end
- elseif stanza.attr.type == "get" or stanza.attr.type == "set" then
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
- end
- 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" and stanza.attr.type ~= "error" then
- -- inbound presence subscriptions and probes, already handled, so should never get here
- else
- -- TODO send unavailable presence or unsubscribed
- end
- elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
- stanza.attr.to = to_bare; -- TODO not in RFC, but seems obvious. Should discuss on the mailing list.
- 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
- elseif stanza.attr.type == "groupchat" then
- local reply = st.error_reply(stanza, "cancel", "service-unavailable");
- reply.attr.from = to;
- origin.send(reply);
- end
- -- TODO allow configuration of offline storage
- -- TODO send error if not storing offline
- elseif stanza.name == "iq" and (stanza.attr.type == "get" or stanza.attr.type == "set") then
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
- 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
- local t = stanza.attr.type;
- if t == "subscribe" or t == "probe" then
- origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
- end
- -- else ignore
- elseif stanza.attr.type ~= "error" and (stanza.name ~= "iq" or stanza.attr.type ~= "result") then
- origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
- end
- end
- end
- 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
- 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);
+ if hosts[host] then
+ -- old stanza routing code removed
+ core_post_stanza(origin, stanza);
else
- log("warn", "received stanza from unhandled connection type: %s", origin.type);
- end
- stanza.attr.to = to; -- reset
-end
-
-function select_best_resources(user)
- local priority = 0;
- local recipients = {};
- for _, session in pairs(user.sessions) do -- find resource with greatest priority
- if session.presence then
- local p = session.priority;
- if p > priority then
- priority = p;
- recipients = {session};
- elseif p == priority then
- t_insert(recipients, session);
+ 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
+ log("debug", "... no, just kidding.");
+ if stanza.attr.type == "error" or (stanza.name == "iq" and stanza.attr.type == "result") then return; end
+ core_route_stanza(host_session, st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote domains is not enabled"));
end
end
end
- return recipients;
end
+prosody.core_process_stanza = core_process_stanza;
+prosody.core_post_stanza = core_post_stanza;
+prosody.core_route_stanza = core_route_stanza;
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