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core/stanza_router.lua @ 3689:2ca76b4f6404
mod_proxy65: Allow loading on normal hosts.
author | Waqas Hussain <waqas20@gmail.com> |
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date | Fri, 03 Dec 2010 00:04:32 +0500 |
parent | 3586:78ed7ad330ab |
child | 4130:c3508071af47 |
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-- 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.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 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 core_process_stanza(origin, stanza) (origin.log or log)("debug", "Received[%s]: %s", origin.type, stanza:top_tag()) -- 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 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 -- TODO also, stanzas should be returned to their original state before the function ends 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 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 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 end 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 --[[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 event = "stanza/"..stanza.name; end else 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 -- 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, 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, 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 else if host then to_type = '/host'; else to_type = '/bare'; to_self = true; end end 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 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); -- 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