--- 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"
-
local log = require "util.logger".init("stanzarouter")
local st = require "util.stanza";
-local send = require "core.sessionmanager".send_to_session;
+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;
-require "util.jid"
-local jid_split = jid.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 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;
function core_process_stanza(origin, stanza)
- log("debug", "Received: "..tostring(stanza))
+ (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:pretty_print()) --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] and stanza.tags[1].name == "bind"
+ 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 = stanza.attr.to;
- stanza.attr.from = origin.full_jid -- quick fix to prevent impersonation
-
- if not to or (hosts[to] and hosts[to].type == "local") then
+ 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
+
+ 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?
+ end
+ 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(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[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);
+ end
+ else
core_handle_stanza(origin, stanza);
- elseif origin.type == "c2s" then
- core_route_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(stanza.attr.to or origin.host, origin, stanza) then return; end
if origin.type == "c2s" or origin.type == "c2s_unauthed" then
local session = origin;
- stanza.attr.from = session.full_jid;
-
- log("debug", "Routing stanza");
- -- Stanza has no to attribute
- --local to_node, to_host, to_resource = jid_split(stanza.attr.to);
- --if not to_host then error("Invalid destination JID: "..string.format("{ %q, %q, %q } == %q", to_node or "", to_host or "", to_resource or "", stanza.attr.to or "nil")); end
-
- -- Stanza is to this server, or a user on this server
- log("debug", "Routing stanza to local");
- handle_stanza(session, stanza);
+
+ 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;
+ 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
+ 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
+ end
+ 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?
+ end
+ end -- TODO handle other stanzas
+ 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?
+ end
end
end
function core_route_stanza(origin, stanza)
-- Hooks
--- ...later
-
+
-- Deliver
- local node, host, resource = jid_split(stanza.attr.to);
+ 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];
- -- TODO do something about presence broadcast
if not res then
-- if we get here, resource was not specified or was unavailable
- for k in pairs(user.sessions) do
- res = user.sessions[k];
- break;
- end
- -- TODO find resource with greatest priority
- end
- stanza.attr.to = res.full_jid;
- send(res, stanza); -- Yay \o/
- else
- -- user not found
- send(origin, st.error_reply(stanza, "cancel", "service-unavailable"));
- end
- else
- -- Remote host
- if host_session then
- -- Send to session
- else
- -- Need to establish the connection
- end
- end
-end
-
-function handle_stanza_nodest(stanza)
- if stanza.name == "iq" then
- handle_stanza_iq_no_to(session, stanza);
- elseif stanza.name == "presence" then
- -- Broadcast to this user's contacts
- handle_stanza_presence_broadcast(session, stanza);
- -- also, if it is initial presence, send out presence probes
- if not session.last_presence then
- handle_stanza_presence_probe_broadcast(session, stanza);
- end
- session.last_presence = stanza;
- elseif stanza.name == "message" then
- -- Treat as if message was sent to bare JID of the sender
- handle_stanza_to_local_user(stanza);
- end
-end
-
-function handle_stanza_tolocal(stanza)
- local node, host, resource = jid.split(stanza.attr.to);
- if host and hosts[host] and hosts[host].type == "local" then
- -- Is a local host, handle internally
- if node then
- -- Is a local user, send to their session
- log("debug", "Routing stanza to %s@%s", node, host);
- if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
- handle_stanza_to_local_user(stanza);
- else
- -- Is sent to this server, let's handle it...
- log("debug", "Routing stanza to %s", host);
- handle_stanza_to_server(stanza, session);
- end
- end
-end
-
-function handle_stanza_toremote(stanza)
- log("error", "Stanza bound for remote host, but s2s is not implemented");
-end
-
-
---[[
-local function route_c2s_stanza(session, stanza)
- stanza.attr.from = session.full_jid;
- if not stanza.attr.to and session.username then
- -- Has no 'to' attribute, handle internally
- if stanza.name == "iq" then
- handle_stanza_iq_no_to(session, stanza);
- elseif stanza.name == "presence" then
- -- Broadcast to this user's contacts
- handle_stanza_presence_broadcast(session, stanza);
- -- also, if it is initial presence, send out presence probes
- if not session.last_presence then
- handle_stanza_presence_probe_broadcast(session, stanza);
- end
- session.last_presence = stanza;
- elseif stanza.name == "message" then
- -- Treat as if message was sent to bare JID of the sender
- handle_stanza_to_local_user(stanza);
- end
- end
- local node, host, resource = jid.split(stanza.attr.to);
- if host and hosts[host] and hosts[host].type == "local" then
- -- Is a local host, handle internally
- if node then
- -- Is a local user, send to their session
- if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
- handle_stanza_to_local_user(stanza);
- else
- -- Is sent to this server, let's handle it...
- handle_stanza_to_server(stanza, session);
- end
- else
- -- Is not for us or a local user, route accordingly
- route_s2s_stanza(stanza);
- end
-end
-
-function handle_stanza_no_to(session, stanza)
- if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
- local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns);
- if stanza.attr.type == "get" or stanza.attr.type == "set" then
- if iq_handlers[xmlns] then
- if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it
- end
- -- Oh, handler didn't handle it. Need to send service-unavailable now.
- log("warn", "Unhandled namespace: "..xmlns);
- session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
- return; -- All done!
- end
-end
-
-function handle_stanza_to_local_user(stanza)
- if stanza.name == "message" then
- handle_stanza_message_to_local_user(stanza);
- elseif stanza.name == "presence" then
- handle_stanza_presence_to_local_user(stanza);
- elseif stanza.name == "iq" then
- handle_stanza_iq_to_local_user(stanza);
- end
-end
-
-function handle_stanza_message_to_local_user(stanza)
- local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
- local destuser = hosts[host].sessions[node];
- if destuser then
- if resource and destuser[resource] then
- destuser[resource]:send(stanza);
- else
- -- Bare JID, or resource offline
- local best_session;
- for resource, session in pairs(destuser.sessions) do
- if not best_session then best_session = session;
- elseif session.priority >= best_session.priority and session.priority >= 0 then
- best_session = session;
+ 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
- end
- if not best_session then
- offlinemessage.new(node, host, stanza);
- else
- print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
- destuser[best_session]:send(stanza);
- end
- end
- else
- -- User is offline
- offlinemessage.new(node, host, stanza);
- end
-end
-
-function handle_stanza_presence_to_local_user(stanza)
- local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
- local destuser = hosts[host].sessions[node];
- if destuser then
- if resource then
- if destuser[resource] then
- destuser[resource]:send(stanza);
else
- return;
+ -- User + resource is online...
+ stanza.attr.to = res.full_jid; -- reset at the end of function
+ res.send(stanza); -- Yay \o/
end
else
- -- Broadcast to all user's resources
- for resource, session in pairs(destuser.sessions) do
- session:send(stanza);
- end
- end
- end
-end
-
-function handle_stanza_iq_to_local_user(stanza)
-
-end
-
-function foo()
- local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
- local destuser = hosts[host].sessions[node];
- if destuser and destuser.sessions then
- -- User online
- if resource and destuser.sessions[resource] then
- stanza.to:send(stanza);
- else
- --User is online, but specified resource isn't (or no resource specified)
- local best_session;
- for resource, session in pairs(destuser.sessions) do
- if not best_session then best_session = session;
- elseif session.priority >= best_session.priority and session.priority >= 0 then
- best_session = session;
+ -- 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
- if not best_session then
- offlinemessage.new(node, host, stanza);
- else
- print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
- resource = best_session.resource;
- end
- end
- if destuser.sessions[resource] == session then
- log("warn", "core", "Attempt to send stanza to self, dropping...");
- else
- print("...sending...", tostring(stanza));
- --destuser.sessions[resource].conn.write(tostring(data));
- print(" to conn ", destuser.sessions[resource].conn);
- destuser.sessions[resource].conn.write(tostring(stanza));
- print("...sent")
- end
- elseif stanza.name == "message" then
- print(" ...will be stored offline");
- offlinemessage.new(node, host, stanza);
- elseif stanza.name == "iq" then
- print(" ...is an iq");
- stanza.from:send(st.reply(stanza)
- :tag("error", { type = "cancel" })
- :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
- end
-end
-
--- Broadcast a presence stanza to all of a user's contacts
-function handle_stanza_presence_broadcast(session, stanza)
- if session.roster then
- local initial_presence = not session.last_presence;
- session.last_presence = stanza;
-
- -- Broadcast presence and probes
- local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
-
- for child in stanza:childtags() do
- broadcast:add_child(child);
- end
- for contact_jid in pairs(session.roster) do
- broadcast.attr.to = contact_jid;
- send_to(contact_jid, broadcast);
- if initial_presence then
- local node, host = jid.split(contact_jid);
- if hosts[host] and hosts[host].type == "local" then
- local contact = hosts[host].sessions[node]
- if contact then
- local pres = st.presence { to = session.full_jid };
- for resource, contact_session in pairs(contact.sessions) do
- if contact_session.last_presence then
- pres.tags = contact_session.last_presence.tags;
- pres.attr.from = contact_session.full_jid;
- send(pres);
- end
- 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
- --FIXME: Do we send unavailable if they are offline?
+ -- else ignore
else
- probe.attr.to = contact;
- send_to(contact, probe);
+ origin.send(st.error_reply(stanza, "cancel", "service-unavailable"));
end
end
end
-
- -- Probe for our contacts' presence
+ 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
--- Broadcast presence probes to all of a user's contacts
-function handle_stanza_presence_probe_broadcast(session, stanza)
+function handle_stanza_toremote(stanza)
+ log("error", "Stanza bound for remote host, but s2s is not implemented");
end
---
-function handle_stanza_to_server(stanza)
-end
-function handle_stanza_iq_no_to(session, stanza)
-end
-]]
\ No newline at end of file
projects / prosody.git / blobdiff