Tue, 06 Oct 2009 11:02:33 +0100
s2smanager: Improve log message on missing to/from in stream header
-- Prosody IM -- Copyright (C) 2008-2009 Matthew Wild -- Copyright (C) 2008-2009 Waqas Hussain -- -- This project is MIT/X11 licensed. Please see the -- COPYING file in the source package for more information. -- local datamanager = require "util.datamanager"; local datetime = require "util.datetime"; local jid_split = require "util.jid".split; local jid_bare = require "util.jid".bare; local jid_prep = require "util.jid".prep; local st = require "util.stanza"; local log = require "util.logger".init("mod_muc"); local multitable_new = require "util.multitable".new; local t_insert, t_remove = table.insert, table.remove; local setmetatable = setmetatable; local base64 = require "util.encodings".base64; local md5 = require "util.hashes".md5; local muc_domain = nil; --module:get_host(); local history_length = 20; ------------ local function filter_xmlns_from_array(array, filters) local count = 0; for i=#array,1,-1 do local attr = array[i].attr; if filters[attr and attr.xmlns] then t_remove(array, i); count = count + 1; end end return count; end local function filter_xmlns_from_stanza(stanza, filters) if filters then if filter_xmlns_from_array(stanza.tags, filters) ~= 0 then return stanza, filter_xmlns_from_array(stanza, filters); end end return stanza, 0; end local presence_filters = {["http://jabber.org/protocol/muc"]=true;["http://jabber.org/protocol/muc#user"]=true}; local function get_filtered_presence(stanza) return filter_xmlns_from_stanza(st.clone(stanza), presence_filters); end local kickable_error_conditions = { ["gone"] = true; ["internal-server-error"] = true; ["item-not-found"] = true; ["jid-malformed"] = true; ["recipient-unavailable"] = true; ["redirect"] = true; ["remote-server-not-found"] = true; ["remote-server-timeout"] = true; ["service-unavailable"] = true; }; local function get_kickable_error(stanza) for _, tag in ipairs(stanza.tags) do if tag.name == "error" and tag.attr.xmlns == "jabber:client" then for _, cond in ipairs(tag.tags) do if cond.attr.xmlns == "urn:ietf:params:xml:ns:xmpp-stanzas" then return kickable_error_conditions[cond.name] and cond.name; end end return true; -- malformed error message end end return true; -- malformed error message end local function getUsingPath(stanza, path, getText) local tag = stanza; for _, name in ipairs(path) do if type(tag) ~= 'table' then return; end tag = tag:child_with_name(name); end if tag and getText then tag = table.concat(tag); end return tag; end local function getTag(stanza, path) return getUsingPath(stanza, path); end local function getText(stanza, path) return getUsingPath(stanza, path, true); end ----------- --[[function get_room_disco_info(room, stanza) return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#info") :tag("identity", {category='conference', type='text', name=room._data["name"]):up() :tag("feature", {var="http://jabber.org/protocol/muc"}); -- TODO cache disco reply end function get_room_disco_items(room, stanza) return st.iq({type='result', id=stanza.attr.id, from=stanza.attr.to, to=stanza.attr.from}):query("http://jabber.org/protocol/disco#items"); end -- TODO allow non-private rooms]] -- local room_mt = {}; room_mt.__index = room_mt; function room_mt:get_default_role(affiliation) if affiliation == "owner" or affiliation == "admin" then return "moderator"; elseif affiliation == "member" or not affiliation then return "participant"; end end function room_mt:broadcast_presence(stanza, code, nick) stanza = get_filtered_presence(stanza); local occupant = self._occupants[stanza.attr.from]; stanza:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) :tag("item", {affiliation=occupant.affiliation, role=occupant.role, nick=nick}):up(); if code then stanza:tag("status", {code=code}):up(); end self:broadcast_except_nick(stanza, stanza.attr.from); local me = self._occupants[stanza.attr.from]; if me then stanza:tag("status", {code='110'}); for jid in pairs(me.sessions) do stanza.attr.to = jid; self:route_stanza(stanza); end end end function room_mt:broadcast_message(stanza, historic) for occupant, o_data in pairs(self._occupants) do for jid in pairs(o_data.sessions) do stanza.attr.to = jid; self:route_stanza(stanza); end end if historic then -- add to history local history = self._data['history']; if not history then history = {}; self._data['history'] = history; end -- stanza = st.clone(stanza); stanza:tag("delay", {xmlns = "urn:xmpp:delay", from = muc_domain, stamp = datetime.datetime()}):up(); -- XEP-0203 stanza:tag("x", {xmlns = "jabber:x:delay", from = muc_domain, stamp = datetime.legacy()}):up(); -- XEP-0091 (deprecated) t_insert(history, st.clone(st.preserialize(stanza))); while #history > history_length do t_remove(history, 1) end end end function room_mt:broadcast_except_nick(stanza, nick) for rnick, occupant in pairs(self._occupants) do if rnick ~= nick then for jid in pairs(occupant.sessions) do stanza.attr.to = jid; self:route_stanza(stanza); end end end end function room_mt:send_occupant_list(to) local current_nick = self._jid_nick[to]; for occupant, o_data in pairs(self._occupants) do if occupant ~= current_nick then local pres = get_filtered_presence(o_data.sessions[o_data.jid]); pres.attr.to, pres.attr.from = to, occupant; pres:tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) :tag("item", {affiliation=o_data.affiliation, role=o_data.role}):up(); self:route_stanza(pres); end end end function room_mt:send_history(to) local history = self._data['history']; -- send discussion history if history then for _, msg in ipairs(history) do msg = st.deserialize(msg); msg.attr.to=to; self:route_stanza(msg); end end if self._data['subject'] then self:route_stanza(st.message({type='groupchat', from=self.jid, to=to}):tag("subject"):text(self._data['subject'])); end end local function room_get_disco_info(self, stanza) return st.reply(stanza):query("http://jabber.org/protocol/disco#info") :tag("identity", {category="conference", type="text"}):up() :tag("feature", {var="http://jabber.org/protocol/muc"}); end local function room_get_disco_items(self, stanza) return st.reply(stanza):query("http://jabber.org/protocol/disco#items"); end function room_mt:set_subject(current_nick, subject) -- TODO check nick's authority if subject == "" then subject = nil; end self._data['subject'] = subject; if self.save then self:save(); end local msg = st.message({type='groupchat', from=current_nick}) :tag('subject'):text(subject):up(); self:broadcast_message(msg, false); return true; end function room_mt:handle_to_occupant(origin, stanza) -- PM, vCards, etc local from, to = stanza.attr.from, stanza.attr.to; local room = jid_bare(to); local current_nick = self._jid_nick[from]; local type = stanza.attr.type; log("debug", "room: %s, current_nick: %s, stanza: %s", room or "nil", current_nick or "nil", stanza:top_tag()); if (select(2, jid_split(from)) == muc_domain) then error("Presence from the MUC itself!!!"); end if stanza.name == "presence" then local pr = get_filtered_presence(stanza); pr.attr.from = current_nick; if type == "error" then -- error, kick em out! if current_nick then log("debug", "kicking %s from %s", current_nick, room); self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}) :tag('status'):text('This participant is kicked from the room because he sent an error presence')); -- send unavailable end elseif type == "unavailable" then -- unavailable if current_nick then log("debug", "%s leaving %s", current_nick, room); local occupant = self._occupants[current_nick]; local old_session = occupant.sessions[from]; local new_jid = next(occupant.sessions); if new_jid == from then new_jid = next(occupant.sessions, new_jid); end if new_jid then occupant.jid = new_jid; occupant.sessions[from] = nil; local pr = st.clone(occupant[new_jid]) :tag("x", {xmlns='http://jabber.org/protocol/muc#user'}) :tag("item", {affiliation=occupant.affiliation, role=occupant.role}); self:broadcast_except_nick(pr, current_nick); else occupant.role = 'none'; self:broadcast_presence(pr); self._occupants[current_nick] = nil; end self._jid_nick[from] = nil; end elseif not type then -- available if current_nick then --if #pr == #stanza or current_nick ~= to then -- commented because google keeps resending directed presence if current_nick == to then -- simple presence log("debug", "%s broadcasted presence", current_nick); self._occupants[current_nick].sessions[from] = pr; self:broadcast_presence(pr); else -- change nick if self._occupants[to] then log("debug", "%s couldn't change nick", current_nick); local reply = st.error_reply(stanza, "cancel", "conflict"):up(); reply.tags[1].attr.code = "409"; origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"})); else local data = self._occupants[current_nick]; local to_nick = select(3, jid_split(to)); if to_nick then log("debug", "%s (%s) changing nick to %s", current_nick, data.jid, to); local p = st.presence({type='unavailable', from=current_nick}); self:broadcast_presence(p, '303', to_nick); self._occupants[current_nick] = nil; self._occupants[to] = data; self._jid_nick[from] = to; pr.attr.from = to; self._occupants[to].sessions[from] = pr; self:broadcast_presence(pr); else --TODO malformed-jid end end end --else -- possible rejoin -- log("debug", "%s had connection replaced", current_nick); -- self:handle_to_occupant(origin, st.presence({type='unavailable', from=from, to=to}) -- :tag('status'):text('Replaced by new connection'):up()); -- send unavailable -- self:handle_to_occupant(origin, stanza); -- resend available --end else -- enter room local new_nick = to; if self._occupants[to] then new_nick = nil; end if not new_nick then log("debug", "%s couldn't join due to nick conflict: %s", from, to); local reply = st.error_reply(stanza, "cancel", "conflict"):up(); reply.tags[1].attr.code = "409"; origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"})); else log("debug", "%s joining as %s", from, to); if not next(self._affiliations) then -- new room, no owners self._affiliations[jid_bare(from)] = "owner"; end local affiliation = self:get_affiliation(from); local role = self:get_default_role(affiliation) if role then -- new occupant self._occupants[to] = {affiliation=affiliation, role=role, jid=from, sessions={[from]=get_filtered_presence(stanza)}}; self._jid_nick[from] = to; self:send_occupant_list(from); pr.attr.from = to; self:broadcast_presence(pr); self:send_history(from); else -- banned local reply = st.error_reply(stanza, "auth", "forbidden"):up(); reply.tags[1].attr.code = "403"; origin.send(reply:tag("x", {xmlns = "http://jabber.org/protocol/muc"})); end end end elseif type ~= 'result' then -- bad type origin.send(st.error_reply(stanza, "modify", "bad-request")); -- FIXME correct error? end elseif not current_nick then -- not in room if type == "error" or type == "result" then local id = stanza.name == "iq" and stanza.attr.id and base64.decode(stanza.attr.id); local _nick, _id, _hash = (id or ""):match("^(.+)%z(.*)%z(.+)$"); local occupant = self._occupants[stanza.attr.to]; if occupant and _nick and self._jid_nick[_nick] and _id and _hash then local id, _to = stanza.attr.id; for jid in pairs(occupant.sessions) do if md5(jid) == _hash then _to = jid; break; end end if _to then stanza.attr.to, stanza.attr.from, stanza.attr.id = _to, self._jid_nick[_nick], _id; self:route_stanza(stanza); stanza.attr.to, stanza.attr.from, stanza.attr.id = to, from, id; end end else origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); end elseif stanza.name == "message" and type == "groupchat" then -- groupchat messages not allowed in PM origin.send(st.error_reply(stanza, "modify", "bad-request")); else -- private stanza local o_data = self._occupants[to]; if o_data then log("debug", "%s sent private stanza to %s (%s)", from, to, o_data.jid); local jid = o_data.jid; local bare = jid_bare(jid); stanza.attr.to, stanza.attr.from = jid, current_nick; local id = stanza.attr.id; if stanza.name=='iq' and type=='get' and stanza.tags[1].attr.xmlns == 'vcard-temp' and bare ~= jid then stanza.attr.to = bare; stanza.attr.id = base64.encode(jid.."\0"..id.."\0"..md5(from)); end self:route_stanza(stanza); stanza.attr.to, stanza.attr.from, stanza.attr.id = to, from, id; elseif type ~= "error" and type ~= "result" then -- recipient not in room origin.send(st.error_reply(stanza, "cancel", "item-not-found", "Recipient not in room")); end end end function room_mt:handle_form(origin, stanza) if self:get_affiliation(stanza.attr.from) ~= "owner" then origin.send(st.error_reply(stanza, "auth", "forbidden")); return; end if stanza.attr.type == "get" then local title = "Configuration for "..self.jid; origin.send(st.reply(stanza):query("http://jabber.org/protocol/muc#owner") :tag("x", {xmlns='jabber:x:data', type='form'}) :tag("title"):text(title):up() :tag("instructions"):text(title):up() :tag("field", {type='hidden', var='FORM_TYPE'}):tag("value"):text("http://jabber.org/protocol/muc#roomconfig"):up():up() :tag("field", {type='boolean', label='Make Room Persistent?', var='muc#roomconfig_persistentroom'}) :tag("value"):text(self._data.persistent and "1" or "0"):up() :up() :tag("field", {type='boolean', label='Make Room Publicly Searchable?', var='muc#roomconfig_publicroom'}) :tag("value"):text(self._data.hidden and "0" or "1"):up() :up() ); elseif stanza.attr.type == "set" then local query = stanza.tags[1]; local form; for _, tag in ipairs(query.tags) do if tag.name == "x" and tag.attr.xmlns == "jabber:x:data" then form = tag; break; end end if not form then origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); return; end if form.attr.type == "cancel" then origin.send(st.reply(stanza)); return; end if form.attr.type ~= "submit" then origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end local fields = {}; for _, field in pairs(form.tags) do if field.name == "field" and field.attr.var and field.tags[1].name == "value" and #field.tags[1].tags == 0 then fields[field.attr.var] = field.tags[1][1] or ""; end end if fields.FORM_TYPE ~= "http://jabber.org/protocol/muc#roomconfig" then origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end local persistent = fields['muc#roomconfig_persistentroom']; if persistent == "0" or persistent == "false" then persistent = nil; elseif persistent == "1" or persistent == "true" then persistent = true; else origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end self._data.persistent = persistent; module:log("debug", "persistent=%s", tostring(persistent)); local public = fields['muc#roomconfig_publicroom']; if public == "0" or public == "false" then public = nil; elseif public == "1" or public == "true" then public = true; else origin.send(st.error_reply(stanza, "cancel", "bad-request")); return; end self._data.hidden = not public and true or nil; if self.save then self:save(true); end origin.send(st.reply(stanza)); end end function room_mt:handle_to_room(origin, stanza) -- presence changes and groupchat messages, along with disco/etc local type = stanza.attr.type; local xmlns = stanza.tags[1] and stanza.tags[1].attr.xmlns; if stanza.name == "iq" then if xmlns == "http://jabber.org/protocol/disco#info" and type == "get" then origin.send(room_get_disco_info(self, stanza)); elseif xmlns == "http://jabber.org/protocol/disco#items" and type == "get" then origin.send(room_get_disco_items(self, stanza)); elseif xmlns == "http://jabber.org/protocol/muc#admin" then local actor = stanza.attr.from; local affiliation = self:get_affiliation(actor); local current_nick = self._jid_nick[actor]; local role = current_nick and self._occupants[current_nick].role or self:get_default_role(affiliation); local item = stanza.tags[1].tags[1]; if item and item.name == "item" then if type == "set" then local callback = function() origin.send(st.reply(stanza)); end if item.attr.jid then -- Validate provided JID item.attr.jid = jid_prep(item.attr.jid); if not item.attr.jid then origin.send(st.error_reply(stanza, "modify", "jid-malformed")); return; end end if not item.attr.jid and item.attr.nick then -- COMPAT Workaround for Miranda sending 'nick' instead of 'jid' when changing affiliation local occupant = self._occupants[self.jid.."/"..item.attr.nick]; if occupant then item.attr.jid = occupant.jid; end end if item.attr.affiliation and item.attr.jid and not item.attr.role then local success, errtype, err = self:set_affiliation(actor, item.attr.jid, item.attr.affiliation, callback); if not success then origin.send(st.error_reply(stanza, errtype, err)); end elseif item.attr.role and item.attr.nick and not item.attr.affiliation then local success, errtype, err = self:set_role(actor, self.jid.."/"..item.attr.nick, item.attr.role, callback); if not success then origin.send(st.error_reply(stanza, errtype, err)); end else origin.send(st.error_reply(stanza, "cancel", "bad-request")); end elseif type == "get" then local _aff = item.attr.affiliation; local _rol = item.attr.role; if _aff and not _rol then if affiliation == "owner" or (affiliation == "admin" and _aff ~= "owner" and _aff ~= "admin") then local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin"); for jid, affiliation in pairs(self._affiliations) do if affiliation == _aff then reply:tag("item", {affiliation = _aff, jid = jid}):up(); end end origin.send(reply); else origin.send(st.error_reply(stanza, "auth", "forbidden")); end elseif _rol and not _aff then if role == "moderator" then -- TODO allow admins and owners not in room? Provide read-only access to everyone who can see the participants anyway? if _rol == "none" then _rol = nil; end local reply = st.reply(stanza):query("http://jabber.org/protocol/muc#admin"); for nick, occupant in pairs(self._occupants) do if occupant.role == _rol then reply:tag("item", {nick = nick, role = _rol or "none", affiliation = occupant.affiliation or "none", jid = occupant.jid}):up(); end end origin.send(reply); else origin.send(st.error_reply(stanza, "auth", "forbidden")); end else origin.send(st.error_reply(stanza, "cancel", "bad-request")); end end elseif type == "set" or type == "get" then origin.send(st.error_reply(stanza, "cancel", "bad-request")); end elseif xmlns == "http://jabber.org/protocol/muc#owner" and (type == "get" or type == "set") and stanza.tags[1].name == "query" then self:handle_form(origin, stanza); elseif type == "set" or type == "get" then origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); end elseif stanza.name == "message" and type == "groupchat" then local from, to = stanza.attr.from, stanza.attr.to; local room = jid_bare(to); local current_nick = self._jid_nick[from]; if not current_nick then -- not in room origin.send(st.error_reply(stanza, "cancel", "not-acceptable")); else local from = stanza.attr.from; stanza.attr.from = current_nick; local subject = getText(stanza, {"subject"}); if subject then self:set_subject(current_nick, subject); -- TODO use broadcast_message_stanza else self:broadcast_message(stanza, true); end end elseif stanza.name == "message" and type == "error" and get_kickable_error(stanza) then local current_nick = self._jid_nick[stanza.attr.from]; log("debug", "%s kicked from %s for sending an error message", current_nick, self.jid); self:handle_to_occupant(origin, st.presence({type='unavailable', from=stanza.attr.from, to=stanza.attr.to}) :tag('status'):text('This participant is kicked from the room because he sent an error message to another occupant')); -- send unavailable elseif stanza.name == "presence" then -- hack - some buggy clients send presence updates to the room rather than their nick local to = stanza.attr.to; local current_nick = self._jid_nick[stanza.attr.from]; if current_nick then stanza.attr.to = current_nick; self:handle_to_occupant(origin, stanza); stanza.attr.to = to; elseif type ~= "error" and type ~= "result" then origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); end elseif stanza.name == "message" and not stanza.attr.type and #stanza.tags == 1 and self._jid_nick[stanza.attr.from] and stanza.tags[1].name == "x" and stanza.tags[1].attr.xmlns == "http://jabber.org/protocol/muc#user" and #stanza.tags[1].tags == 1 and stanza.tags[1].tags[1].name == "invite" and stanza.tags[1].tags[1].attr.to then local _from, _to = stanza.attr.from, stanza.attr.to; local _invitee = stanza.tags[1].tags[1].attr.to; stanza.attr.from, stanza.attr.to = _to, _invitee; stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = _from, nil; self:route_stanza(stanza); stanza.tags[1].tags[1].attr.from, stanza.tags[1].tags[1].attr.to = nil, _invitee; stanza.attr.from, stanza.attr.to = _from, _to; else if type == "error" or type == "result" then return; end origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); end end function room_mt:handle_stanza(origin, stanza) local to_node, to_host, to_resource = jid_split(stanza.attr.to); if to_resource then self:handle_to_occupant(origin, stanza); else self:handle_to_room(origin, stanza); end end function room_mt:route_stanza(stanza) end -- Replace with a routing function, e.g., function(room, stanza) core_route_stanza(origin, stanza); end function room_mt:get_affiliation(jid) local node, host, resource = jid_split(jid); local bare = node and node.."@"..host or host; local result = self._affiliations[bare]; -- Affiliations are granted, revoked, and maintained based on the user's bare JID. if not result and self._affiliations[host] == "outcast" then result = "outcast"; end -- host banned return result; end function room_mt:set_affiliation(actor, jid, affiliation, callback) jid = jid_bare(jid); if affiliation == "none" then affiliation = nil; end if affiliation and affiliation ~= "outcast" and affiliation ~= "owner" and affiliation ~= "admin" and affiliation ~= "member" then return nil, "modify", "not-acceptable"; end if self:get_affiliation(actor) ~= "owner" then return nil, "cancel", "not-allowed"; end if jid_bare(actor) == jid then return nil, "cancel", "not-allowed"; end self._affiliations[jid] = affiliation; local role = self:get_default_role(affiliation); local p = st.presence() :tag("x", {xmlns = "http://jabber.org/protocol/muc#user"}) :tag("item", {affiliation=affiliation or "none", role=role or "none"}):up(); local x = p.tags[1]; local item = x.tags[1]; if not role then -- getting kicked p.attr.type = "unavailable"; if affiliation == "outcast" then x:tag("status", {code="301"}):up(); -- banned else x:tag("status", {code="321"}):up(); -- affiliation change end end local modified_nicks = {}; for nick, occupant in pairs(self._occupants) do if jid_bare(occupant.jid) == jid then if not role then -- getting kicked self._occupants[nick] = nil; else t_insert(modified_nicks, nick); occupant.affiliation, occupant.role = affiliation, role; end p.attr.from = nick; for jid in pairs(occupant.sessions) do -- remove for all sessions of the nick if not role then self._jid_nick[jid] = nil; end p.attr.to = jid; self:route_stanza(p); end end end if self.save then self:save(); end if callback then callback(); end for _, nick in ipairs(modified_nicks) do p.attr.from = nick; self:broadcast_except_nick(p, nick); end return true; end function room_mt:get_role(nick) local session = self._occupants[nick]; return session and session.role or nil; end function room_mt:set_role(actor, nick, role, callback) if role == "none" then role = nil; end if role and role ~= "moderator" and role ~= "participant" and role ~= "visitor" then return nil, "modify", "not-acceptable"; end if self:get_affiliation(actor) ~= "owner" then return nil, "cancel", "not-allowed"; end local occupant = self._occupants[nick]; if not occupant then return nil, "modify", "not-acceptable"; end if occupant.affiliation == "owner" or occupant.affiliation == "admin" then return nil, "cancel", "not-allowed"; end local p = st.presence({from = nick}) :tag("x", {xmlns = "http://jabber.org/protocol/muc#user"}) :tag("item", {affiliation=occupant.affiliation or "none", nick=nick, role=role or "none"}):up(); if not role then -- kick p.attr.type = "unavailable"; self._occupants[nick] = nil; for jid in pairs(occupant.sessions) do -- remove for all sessions of the nick self._jid_nick[jid] = nil; end p:tag("status", {code = "307"}):up(); else occupant.role = role; end for jid in pairs(occupant.sessions) do -- send to all sessions of the nick p.attr.to = jid; self:route_stanza(p); end if callback then callback(); end self:broadcast_except_nick(p, nick); return true; end local _M = {}; -- module "muc" function _M.new_room(jid) return setmetatable({ jid = jid; _jid_nick = {}; _occupants = {}; _data = {}; _affiliations = {}; }, room_mt); end return _M;