-
--- 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"
+-- 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")
-require "util.jid"
-local jid_split = jid.split;
-
-function core_process_stanza(origin, stanza)
- local to = stanza.attr.to;
-
- if not to or (hosts[to] and hosts[to].type == "local") then
- core_handle_stanza(origin, stanza);
- elseif origin.type == "c2s" then
- core_route_stanza(origin, stanza);
- end
-
-end
-
-function core_handle_stanza(origin, stanza)
- -- Handlers
- 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");
- print(type(origin), type(stanza));
- handle_stanza(session, stanza);
- end
-end
-
-function core_route_stanza(origin, stanza)
- -- Hooks
- -- Deliver
-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);
+local hosts = _G.prosody.hosts;
+local tostring = tostring;
+local st = require "util.stanza";
+local send_s2s = require "core.s2smanager".send_to_host;
+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
- 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
+ if stanza.attr.xmlns == nil 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: %s; xmlns=%s: %s", origin.type, stanza.name, xmlns, tostring(stanza)); -- we didn't handle it
+ origin:close("unsupported-stanza-type");
end
end
-function handle_stanza_toremote(stanza)
- log("error", "Stanza bound for remote host, but s2s is not implemented");
-end
-
+function core_process_stanza(origin, stanza)
+ (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag())
---[[
-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);
+ -- 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 (stanza.attr.type == "set" or stanza.attr.type == "get") and (#stanza.tags ~= 1) then
+ origin.send(st.error_reply(stanza, "modify", "bad-request"));
+ return;
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
+ 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
- -- 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);
+ -- TODO also, stanzas should be returned to their original state before the function ends
+ stanza.attr.from = origin.full_jid;
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);
+ 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
- -- 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;
+ 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
- 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
+ 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
- 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;
- end
- else
- -- Broadcast to all user's resources
- for resource, session in pairs(destuser.sessions) do
- session:send(stanza);
+ 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
-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;
- end
- end
- if not best_session then
- offlinemessage.new(node, host, stanza);
+ --[[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 == 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?
+ 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
- print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
- resource = best_session.resource;
+ event = "stanza/"..stanza.name;
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")
+ event = "stanza/"..xmlns..":"..stanza.name;
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" }));
+ 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
--- 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 });
+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
- 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
- end
- --FIXME: Do we send unavailable if they are offline?
- else
- probe.attr.to = contact;
- send_to(contact, probe);
- end
+ 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
-
- -- Probe for our contacts' presence
+ else
+ if host then
+ to_type = '/host';
+ else
+ to_type = '/bare';
+ to_self = true;
+ end
end
-end
--- Broadcast presence probes to all of a user's contacts
-function handle_stanza_presence_probe_broadcast(session, stanza)
+ 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 handle_stanza_to_server(stanza)
-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);
-function handle_stanza_iq_no_to(session, stanza)
+ -- 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);
+ elseif origin.type == "c2s" then
+ -- Remote host
+ if not hosts[from_host] then
+ log("error", "No hosts[from_host] (please report): %s", tostring(stanza));
+ end
+ if (not hosts[from_host]) or (not hosts[from_host].disallow_s2s) then
+ local xmlns = stanza.attr.xmlns;
+ --stanza.attr.xmlns = "jabber:server";
+ stanza.attr.xmlns = nil;
+ log("debug", "sending s2s stanza: %s", tostring(stanza.top_tag and stanza:top_tag()) or stanza);
+ send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors
+ stanza.attr.xmlns = xmlns; -- reset
+ else
+ core_route_stanza(hosts[from_host], st.error_reply(stanza, "cancel", "not-allowed", "Communication with remote servers is not allowed"));
+ end
+ 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);
+ else
+ log("warn", "received %s stanza from unhandled connection type: %s", tostring(stanza.name), tostring(origin.type));
+ end
end
-]]
\ No newline at end of file
projects / prosody.git / blobdiff