-\r
--- The code in this file should be self-explanatory, though the logic is horrible\r
--- for more info on that, see doc/stanza_routing.txt, which attempts to condense\r
--- the rules from the RFCs (mainly 3921)\r
-\r
-require "core.servermanager"\r
-\r
-local log = require "util.logger".init("stanzarouter")\r
-\r
-local st = require "util.stanza";\r
-local send = require "core.sessionmanager".send_to_session;\r
--- local send_s2s = require "core.s2smanager".send_to_host;\r
-local user_exists = require "core.usermanager".user_exists;\r
-\r
-local jid_split = require "util.jid".split;\r
-local print, debug = print, debug;\r
-\r
-function core_process_stanza(origin, stanza)\r
- log("debug", "Received: "..tostring(stanza))\r
- -- TODO verify validity of stanza (as well as JID validity)\r
- if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then\r
- if stanza.attr.type == "set" or stanza.attr.type == "get" then\r
- error("Invalid IQ");\r
- elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then\r
- error("Invalid IQ");\r
- end\r
- end\r
-\r
- if origin.type == "c2s" and not origin.full_jid\r
- and not(stanza.name == "iq" and stanza.tags[1].name == "bind"\r
- and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then\r
- error("Client MUST bind resource after auth");\r
- end\r
-\r
- local to = stanza.attr.to;\r
- stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s)\r
- -- TODO also, stazas should be returned to their original state before the function ends\r
- \r
- -- TODO presence subscriptions\r
- if not to then\r
- core_handle_stanza(origin, stanza);\r
- elseif hosts[to] and hosts[to].type == "local" then\r
- core_handle_stanza(origin, stanza);\r
- elseif stanza.name == "iq" and not select(3, jid_split(to)) then\r
- core_handle_stanza(origin, stanza);\r
- elseif origin.type == "c2s" then\r
- core_route_stanza(origin, stanza);\r
- end\r
-end\r
-\r
--- This function handles stanzas which are not routed any further,\r
--- that is, they are handled by this server\r
-function core_handle_stanza(origin, stanza)\r
- -- Handlers\r
- if origin.type == "c2s" or origin.type == "c2s_unauthed" then\r
- local session = origin;\r
- \r
- if stanza.name == "presence" and origin.roster then\r
- if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then\r
- for jid in pairs(origin.roster) do -- broadcast to all interested contacts\r
- local subscription = origin.roster[jid].subscription;\r
- if subscription == "both" or subscription == "from" then\r
- stanza.attr.to = jid;\r
- core_route_stanza(origin, stanza);\r
- end\r
- end\r
- local node, host = jid_split(stanza.attr.from);\r
- for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources and from resources\r
- if res ~= origin then\r
- if res.full_jid then -- to resource. FIXME is this check correct? Maybe it should be res.presence\r
- stanza.attr.to = res.full_jid;\r
- core_route_stanza(origin, stanza);\r
- end\r
- if res.presence then -- from all resources for which we have presence\r
- res.presence.attr.to = origin.full_jid;\r
- core_route_stanza(res, res.presence);\r
- res.presence.attr.to = nil;\r
- end\r
- end\r
- end\r
- if not origin.presence then -- presence probes on initial presence\r
- local probe = st.presence({from = origin.full_jid, type = "probe"});\r
- for jid in pairs(origin.roster) do\r
- local subscription = origin.roster[jid].subscription;\r
- if subscription == "both" or subscription == "to" then\r
- probe.attr.to = jid;\r
- core_route_stanza(origin, probe);\r
- end\r
- end\r
- end\r
- origin.presence = stanza;\r
- stanza.attr.to = nil; -- reset it\r
- else\r
- -- TODO error, bad type\r
- end\r
- else\r
- log("debug", "Routing stanza to local");\r
- handle_stanza(session, stanza);\r
- end\r
- end\r
-end\r
-\r
-function is_authorized_to_see_presence(origin, username, host)\r
- local roster = datamanager.load(username, host, "roster") or {};\r
- local item = roster[origin.username.."@"..origin.host];\r
- return item and (item.subscription == "both" or item.subscription == "from");\r
-end\r
-\r
-function core_route_stanza(origin, stanza)\r
- -- Hooks\r
- --- ...later\r
- \r
- -- Deliver\r
- local to = stanza.attr.to;\r
- local node, host, resource = jid_split(to);\r
-\r
- if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end\r
-\r
- local host_session = hosts[host]\r
- if host_session and host_session.type == "local" then\r
- -- Local host\r
- local user = host_session.sessions[node];\r
- if user then\r
- local res = user.sessions[resource];\r
- if not res then\r
- -- if we get here, resource was not specified or was unavailable\r
- if stanza.name == "presence" then\r
- if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then\r
- if stanza.attr.type == "probe" then\r
- if is_authorized_to_see_presence(origin, node, host) then\r
- for k in pairs(user.sessions) do -- return presence for all resources\r
- if user.sessions[k].presence then\r
- local pres = user.sessions[k].presence;\r
- pres.attr.to = origin.full_jid;\r
- pres.attr.from = user.sessions[k].full_jid;\r
- send(origin, pres);\r
- pres.attr.to = nil;\r
- pres.attr.from = nil;\r
- end\r
- end\r
- else\r
- send(origin, st.presence({from=user.."@"..host, to=origin.username.."@"..origin.host, type="unsubscribed"}));\r
- end\r
- elseif stanza.attr.type == "subscribe" then\r
- -- TODO\r
- elseif stanza.attr.type == "unsubscribe" then\r
- -- TODO\r
- elseif stanza.attr.type == "subscribed" then\r
- -- TODO\r
- elseif stanza.attr.type == "unsubscribed" then\r
- -- TODO\r
- end -- discard any other type\r
- else -- sender is available or unavailable\r
- for k in pairs(user.sessions) do -- presence broadcast to all user resources\r
- if user.sessions[k].full_jid then\r
- stanza.attr.to = user.sessions[k].full_jid;\r
- send(user.sessions[k], stanza);\r
- end\r
- end\r
- end\r
- elseif stanza.name == "message" then -- select a resource to recieve message\r
- for k in pairs(user.sessions) do\r
- if user.sessions[k].full_jid then\r
- res = user.sessions[k];\r
- break;\r
- end\r
- end\r
- -- TODO find resource with greatest priority\r
- send(res, stanza);\r
- else\r
- -- TODO send IQ error\r
- end\r
- else\r
- -- User + resource is online...\r
- stanza.attr.to = res.full_jid;\r
- send(res, stanza); -- Yay \o/\r
- end\r
- else\r
- -- user not online\r
- if user_exists(node, host) then\r
- if stanza.name == "presence" then\r
- if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s?\r
- -- TODO send last recieved unavailable presence\r
- else\r
- -- TODO send unavailable presence\r
- end\r
- elseif stanza.name == "message" then\r
- -- TODO send message error, or store offline messages\r
- elseif stanza.name == "iq" then\r
- -- TODO send IQ error\r
- end\r
- else -- user does not exist\r
- -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses?\r
- if stanza.name == "presence" then\r
- if stanza.attr.type == "probe" then\r
- send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"}));\r
- end\r
- -- else ignore\r
- else\r
- send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));\r
- end\r
- end\r
- end\r
- else\r
- -- Remote host\r
- if host_session then\r
- -- Send to session\r
- else\r
- -- Need to establish the connection\r
- end\r
- end\r
- stanza.attr.to = to; -- reset\r
-end\r
-\r
-function handle_stanza_toremote(stanza)\r
- log("error", "Stanza bound for remote host, but s2s is not implemented");\r
-end\r
+-- Prosody IM v0.2
+-- Copyright (C) 2008 Matthew Wild
+-- Copyright (C) 2008 Waqas Hussain
+--
+-- This program is free software; you can redistribute it and/or
+-- modify it under the terms of the GNU General Public License
+-- as published by the Free Software Foundation; either version 2
+-- of the License, or (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+--
+
+
+
+local log = require "util.logger".init("stanzarouter")
+
+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 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 handle_normal_presence = require "core.presencemanager".handle_normal_presence;
+
+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 jid_prepped_split = require "util.jid".prepped_split;
+local print = print;
+local function checked_error_reply(origin, 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?
+ end
+end
+
+function core_process_stanza(origin, stanza)
+ (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");
+ 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
+
+ -- TODO also, stanzas should be returned to their original state before the function ends
+ if origin.type == "c2s" then
+ 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
+ node, host, resource = jid_prepped_split(to);
+ if not host then
+ error("Invalid to JID");
+ 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
+ from_node, from_host, from_resource = jid_prepped_split(from);
+ if not from_host then
+ error("Invalid from JID");
+ 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") and (not xmlns or xmlns == "jabber:server" or xmlns == "jabber:client") 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 conn authed for %s!", from_host, origin.from_host);
+ return; -- FIXME what should we do here? does this work with subdomains?
+ end
+ end
+ 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(host or origin.host or origin.to_host, 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[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 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
+ 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
+ origin.directed = origin.directed or {};
+ t_insert(origin.directed, to); -- FIXME does it make more sense to add to_bare rather than to?
+ end
+ core_route_stanza(origin, stanza);
+ end
+ 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(select(2, jid_split(stanza.attr.to)) or origin.host, origin, stanza) then return; end
+ if origin.type == "c2s" or origin.type == "s2sin" then
+ if origin.type == "c2s" then
+ if stanza.name == "presence" and origin.roster then
+ if stanza.attr.type == nil or stanza.attr.type == "unavailable" then
+ handle_normal_presence(origin, stanza, core_route_stanza);
+ else
+ log("warn", "Unhandled c2s presence: %s", tostring(stanza));
+ checked_error_reply(origin, stanza);
+ end
+ else
+ log("warn", "Unhandled c2s stanza: %s", tostring(stanza));
+ checked_error_reply(origin, stanza);
+ end
+ else -- s2s stanzas
+ log("warn", "Unhandled s2s stanza: %s", tostring(stanza));
+ checked_error_reply(origin, stanza);
+ end
+ else
+ log("warn", "Unhandled %s stanza: %s", origin.type, tostring(stanza));
+ checked_error_reply(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
+
+ -- 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 -- FIXME if full jid, then send out to resources with highest priority
+ 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
+ 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
+ else
+ 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", origin.host, host);
+ send_s2s(origin.host, host, stanza);
+ else
+ log("warn", "received stanza from unhandled connection type: %s", origin.type);
+ end
+ stanza.attr.to = to; -- reset
+end
projects / prosody.git / blobdiff