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271 lines
12 KiB
271 lines
12 KiB
-- Prosody IM v0.2
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-- Copyright (C) 2008 Matthew Wild
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-- Copyright (C) 2008 Waqas Hussain
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--
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-- This program is free software; you can redistribute it and/or
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-- modify it under the terms of the GNU General Public License
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-- as published by the Free Software Foundation; either version 2
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-- of the License, or (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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--
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local log = require "util.logger".init("stanzarouter")
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local st = require "util.stanza";
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local send_s2s = require "core.s2smanager".send_to_host;
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local user_exists = require "core.usermanager".user_exists;
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local rostermanager = require "core.rostermanager";
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local sessionmanager = require "core.sessionmanager";
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local offlinemanager = require "core.offlinemanager";
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local s2s_verify_dialback = require "core.s2smanager".verify_dialback;
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local s2s_make_authenticated = require "core.s2smanager".make_authenticated;
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local modules_handle_stanza = require "core.modulemanager".handle_stanza;
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local component_handle_stanza = require "core.componentmanager".handle_stanza;
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local handle_outbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_outbound_presence_subscriptions_and_probes;
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local handle_inbound_presence_subscriptions_and_probes = require "core.presencemanager".handle_inbound_presence_subscriptions_and_probes;
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local handle_normal_presence = require "core.presencemanager".handle_normal_presence;
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local format = string.format;
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local tostring = tostring;
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local t_concat = table.concat;
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local t_insert = table.insert;
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local tonumber = tonumber;
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local s_find = string.find;
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local jid_split = require "util.jid".split;
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local print = print;
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function core_process_stanza(origin, stanza)
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(origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:pretty_print()) --top_tag())
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if not stanza.attr.xmlns then stanza.attr.xmlns = "jabber:client"; end -- FIXME Hack. This should be removed when we fix namespace handling.
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-- TODO verify validity of stanza (as well as JID validity)
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if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then
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if stanza.attr.type == "set" or stanza.attr.type == "get" then
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error("Invalid IQ");
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elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then
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error("Invalid IQ");
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end
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end
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if origin.type == "c2s" and not origin.full_jid
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and not(stanza.name == "iq" and stanza.tags[1].name == "bind"
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and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then
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error("Client MUST bind resource after auth");
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end
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-- TODO also, stanzas should be returned to their original state before the function ends
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if origin.type == "c2s" then
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stanza.attr.from = origin.full_jid;
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end
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local to, xmlns = stanza.attr.to, stanza.attr.xmlns;
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local node, host, resource = jid_split(to);
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local to_bare = node and (node.."@"..host) or host; -- bare JID
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local from = stanza.attr.from;
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local from_node, from_host, from_resource = jid_split(from);
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local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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--[[if to and not(hosts[to]) and not(hosts[to_bare]) and (hosts[host] and hosts[host].type ~= "local") then -- not for us?
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log("warn", "stanza recieved for a non-local server");
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return; -- FIXME what should we do here?
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end]] -- FIXME
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-- FIXME do stanzas not of jabber:client get handled by components?
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if (origin.type == "s2sin" or origin.type == "c2s") and (not xmlns or xmlns == "jabber:server" or xmlns == "jabber:client") then
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if origin.type == "s2sin" and not origin.dummy then
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local host_status = origin.hosts[from_host];
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if not host_status or not host_status.authed then -- remote server trying to impersonate some other server?
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log("warn", "Received a stanza claiming to be from %s, over a conn authed for %s!", from_host, origin.from_host);
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return; -- FIXME what should we do here? does this work with subdomains?
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end
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end
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if not to then
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core_handle_stanza(origin, stanza);
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elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server
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core_handle_stanza(origin, stanza);
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elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then
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modules_handle_stanza(host or origin.host or origin.to_host, origin, stanza);
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elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource
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component_handle_stanza(origin, stanza);
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elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server
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component_handle_stanza(origin, stanza);
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elseif hosts[host] and hosts[host].type == "component" then -- directed at a component
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component_handle_stanza(origin, stanza);
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elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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elseif origin.type ~= "c2s" and stanza.name == "iq" and not resource then -- directed at bare JID
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core_handle_stanza(origin, stanza);
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else
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if origin.type == "c2s" and stanza.name == "presence" and to ~= nil and not(origin.roster[to_bare] and (origin.roster[to_bare].subscription == "both" or origin.roster[to_bare].subscription == "from")) then
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origin.directed = origin.directed or {};
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t_insert(origin.directed, to); -- FIXME does it make more sense to add to_bare rather than to?
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end
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core_route_stanza(origin, stanza);
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end
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else
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core_handle_stanza(origin, stanza);
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end
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end
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-- This function handles stanzas which are not routed any further,
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-- that is, they are handled by this server
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function core_handle_stanza(origin, stanza)
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-- Handlers
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if modules_handle_stanza(select(2, jid_split(stanza.attr.to)) or origin.host, origin, stanza) then return; end
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if origin.type == "c2s" or origin.type == "s2sin" then
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if origin.type == "c2s" then
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if stanza.name == "presence" and origin.roster then
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if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
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handle_normal_presence(origin, stanza, core_route_stanza);
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else
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log("warn", "Unhandled c2s presence: %s", tostring(stanza));
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if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" then
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origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
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end
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end
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else
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log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
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if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
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end
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end
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else -- s2s stanzas
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log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
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if (stanza.attr.xmlns == "jabber:client" or stanza.attr.xmlns == "jabber:server") and stanza.attr.type ~= "error" and stanza.attr.type ~= "result" then
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origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); -- FIXME correct error?
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end
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end
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else
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log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
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end
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end
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function core_route_stanza(origin, stanza)
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-- Hooks
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--- ...later
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-- Deliver
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local to = stanza.attr.to;
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local node, host, resource = jid_split(to);
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local to_bare = node and (node.."@"..host) or host; -- bare JID
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local from = stanza.attr.from;
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local from_node, from_host, from_resource = jid_split(from);
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local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID
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-- Auto-detect origin if not specified
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origin = origin or hosts[from_host];
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if not origin then return false; end
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if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end
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local host_session = hosts[host]
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if host_session and host_session.type == "local" then
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-- Local host
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local user = host_session.sessions[node];
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if user then
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local res = user.sessions[resource];
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if not res then
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-- if we get here, resource was not specified or was unavailable
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if stanza.name == "presence" then
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if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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else -- sender is available or unavailable
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for _, session in pairs(user.sessions) do -- presence broadcast to all user resources.
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if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription?
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stanza.attr.to = session.full_jid; -- reset at the end of function
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session.send(stanza);
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end
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end
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end
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elseif stanza.name == "message" then -- select a resource to recieve message
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local priority = 0;
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local recipients = {};
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for _, session in pairs(user.sessions) do -- find resource with greatest priority
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local p = session.priority;
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if p > priority then
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priority = p;
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recipients = {session};
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elseif p == priority then
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t_insert(recipients, session);
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end
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end
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local count = 0;
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for _, session in pairs(recipients) do
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session.send(stanza);
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count = count + 1;
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end
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if count == 0 then
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offlinemanager.store(node, host, stanza);
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-- TODO deal with storage errors
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end
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else
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-- TODO send IQ error
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end
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else
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-- User + resource is online...
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stanza.attr.to = res.full_jid; -- reset at the end of function
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res.send(stanza); -- Yay \o/
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end
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else
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-- user not online
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if user_exists(node, host) then
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if stanza.name == "presence" then
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if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then
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handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare, core_route_stanza);
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else
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-- TODO send unavailable presence or unsubscribed
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end
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elseif stanza.name == "message" then -- FIXME if full jid, then send out to resources with highest priority
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if stanza.attr.type == "chat" or stanza.attr.type == "normal" or not stanza.attr.type then
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offlinemanager.store(node, host, stanza);
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-- FIXME don't store messages with only chat state notifications
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end
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-- TODO allow configuration of offline storage
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-- TODO send error if not storing offline
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elseif stanza.name == "iq" then
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origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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end
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else -- user does not exist
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-- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?
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if stanza.name == "presence" then
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local t = stanza.attr.type;
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if t == "subscribe" or t == "probe" then
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origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"}));
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end
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-- else ignore
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else
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origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
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end
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end
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end
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elseif origin.type == "c2s" then
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-- Remote host
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local xmlns = stanza.attr.xmlns;
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--stanza.attr.xmlns = "jabber:server";
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stanza.attr.xmlns = nil;
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log("debug", "sending s2s stanza: %s", tostring(stanza));
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send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
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stanza.attr.xmlns = xmlns; -- reset
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elseif origin.type == "component" or origin.type == "local" then
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-- Route via s2s for components and modules
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log("debug", "Routing outgoing stanza for %s to %s", origin.host, host);
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send_s2s(origin.host, host, stanza);
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else
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log("warn", "received stanza from unhandled connection type: %s", origin.type);
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end
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stanza.attr.to = to; -- reset
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end
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