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xmpp.chapril.org-ejabberd/src/mod_muc.erl
Evgeniy Khramtsov 6dd31299cf Avoid case clause crash when loading permanent rooms
2013-10-23 12:23:00 +10:00

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%%%----------------------------------------------------------------------
%%% File : mod_muc.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : MUC support (XEP-0045)
%%% Created : 19 Mar 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2013 ProcessOne
%%%
%%% 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(mod_muc).
-author('alexey@process-one.net').
-behaviour(gen_server).
-behaviour(gen_mod).
%% API
-export([start_link/2,
start/2,
stop/1,
room_destroyed/4,
store_room/4,
restore_room/3,
forget_room/3,
create_room/5,
shutdown_rooms/1,
process_iq_disco_items/4,
broadcast_service_message/2,
export/1,
import/1,
import/3,
can_use_nick/4]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2,
handle_info/2, terminate/2, code_change/3]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("jlib.hrl").
-record(muc_room, {name_host = {<<"">>, <<"">>} :: {binary(), binary()} |
{'_', binary()},
opts = [] :: list() | '_'}).
-record(muc_online_room,
{name_host = {<<"">>, <<"">>} :: {binary(), binary()} | '$1' |
{'_', binary()} | '_',
pid = self() :: pid() | '$2' | '_' | '$1'}).
-record(muc_registered,
{us_host = {{<<"">>, <<"">>}, <<"">>} :: {{binary(), binary()}, binary()} | '$1',
nick = <<"">> :: binary()}).
-record(state,
{host = <<"">> :: binary(),
server_host = <<"">> :: binary(),
access = {none, none, none, none} :: {atom(), atom(), atom(), atom()},
history_size = 20 :: non_neg_integer(),
default_room_opts = [] :: list(),
room_shaper = none :: shaper:shaper()}).
-define(PROCNAME, ejabberd_mod_muc).
%%====================================================================
%% API
%%====================================================================
%%--------------------------------------------------------------------
%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}
%% Description: Starts the server
%%--------------------------------------------------------------------
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:start_link({local, Proc}, ?MODULE,
[Host, Opts], []).
start(Host, Opts) ->
start_supervisor(Host),
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
ChildSpec = {Proc, {?MODULE, start_link, [Host, Opts]},
temporary, 1000, worker, [?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop(Host) ->
Rooms = shutdown_rooms(Host),
stop_supervisor(Host),
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:call(Proc, stop),
supervisor:delete_child(ejabberd_sup, Proc),
{wait, Rooms}.
shutdown_rooms(Host) ->
MyHost = gen_mod:get_module_opt_host(Host, mod_muc,
<<"conference.@HOST@">>),
Rooms = mnesia:dirty_select(muc_online_room,
[{#muc_online_room{name_host = '$1',
pid = '$2'},
[{'==', {element, 2, '$1'}, MyHost}],
['$2']}]),
[Pid ! shutdown || Pid <- Rooms],
Rooms.
%% This function is called by a room in three situations:
%% A) The owner of the room destroyed it
%% B) The only participant of a temporary room leaves it
%% C) mod_muc:stop was called, and each room is being terminated
%% In this case, the mod_muc process died before the room processes
%% So the message sending must be catched
room_destroyed(Host, Room, Pid, ServerHost) ->
catch gen_mod:get_module_proc(ServerHost, ?PROCNAME) !
{room_destroyed, {Room, Host}, Pid},
ok.
%% @doc Create a room.
%% If Opts = default, the default room options are used.
%% Else use the passed options as defined in mod_muc_room.
create_room(Host, Name, From, Nick, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:call(Proc, {create, Name, From, Nick, Opts}).
store_room(ServerHost, Host, Name, Opts) ->
LServer = jlib:nameprep(ServerHost),
store_room(LServer, Host, Name, Opts,
gen_mod:db_type(LServer, ?MODULE)).
store_room(_LServer, Host, Name, Opts, mnesia) ->
F = fun () ->
mnesia:write(#muc_room{name_host = {Name, Host},
opts = Opts})
end,
mnesia:transaction(F);
store_room(LServer, Host, Name, Opts, odbc) ->
SName = ejabberd_odbc:escape(Name),
SHost = ejabberd_odbc:escape(Host),
SOpts = ejabberd_odbc:encode_term(Opts),
F = fun () ->
odbc_queries:update_t(<<"muc_room">>,
[<<"name">>, <<"host">>, <<"opts">>],
[SName, SHost, SOpts],
[<<"name='">>, SName, <<"' and host='">>,
SHost, <<"'">>])
end,
ejabberd_odbc:sql_transaction(LServer, F).
restore_room(ServerHost, Host, Name) ->
LServer = jlib:nameprep(ServerHost),
restore_room(LServer, Host, Name,
gen_mod:db_type(LServer, ?MODULE)).
restore_room(_LServer, Host, Name, mnesia) ->
case catch mnesia:dirty_read(muc_room, {Name, Host}) of
[#muc_room{opts = Opts}] -> Opts;
_ -> error
end;
restore_room(LServer, Host, Name, odbc) ->
SName = ejabberd_odbc:escape(Name),
SHost = ejabberd_odbc:escape(Host),
case catch ejabberd_odbc:sql_query(LServer,
[<<"select opts from muc_room where name='">>,
SName, <<"' and host='">>, SHost,
<<"';">>])
of
{selected, [<<"opts">>], [[Opts]]} ->
opts_to_binary(ejabberd_odbc:decode_term(Opts));
_ -> error
end.
forget_room(ServerHost, Host, Name) ->
LServer = jlib:nameprep(ServerHost),
forget_room(LServer, Host, Name,
gen_mod:db_type(LServer, ?MODULE)).
forget_room(_LServer, Host, Name, mnesia) ->
F = fun () -> mnesia:delete({muc_room, {Name, Host}})
end,
mnesia:transaction(F);
forget_room(LServer, Host, Name, odbc) ->
SName = ejabberd_odbc:escape(Name),
SHost = ejabberd_odbc:escape(Host),
F = fun () ->
ejabberd_odbc:sql_query_t([<<"delete from muc_room where name='">>,
SName, <<"' and host='">>, SHost,
<<"';">>])
end,
ejabberd_odbc:sql_transaction(LServer, F).
process_iq_disco_items(Host, From, To,
#iq{lang = Lang} = IQ) ->
Rsm = jlib:rsm_decode(IQ),
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, ?NS_DISCO_ITEMS}],
children = iq_disco_items(Host, From, Lang, Rsm)}]},
ejabberd_router:route(To, From, jlib:iq_to_xml(Res)).
can_use_nick(_ServerHost, _Host, _JID, <<"">>) -> false;
can_use_nick(ServerHost, Host, JID, Nick) ->
LServer = jlib:nameprep(ServerHost),
can_use_nick(LServer, Host, JID, Nick,
gen_mod:db_type(LServer, ?MODULE)).
can_use_nick(_LServer, Host, JID, Nick, mnesia) ->
{LUser, LServer, _} = jlib:jid_tolower(JID),
LUS = {LUser, LServer},
case catch mnesia:dirty_select(muc_registered,
[{#muc_registered{us_host = '$1',
nick = Nick, _ = '_'},
[{'==', {element, 2, '$1'}, Host}],
['$_']}])
of
{'EXIT', _Reason} -> true;
[] -> true;
[#muc_registered{us_host = {U, _Host}}] -> U == LUS
end;
can_use_nick(LServer, Host, JID, Nick, odbc) ->
SJID =
jlib:jid_to_string(jlib:jid_tolower(jlib:jid_remove_resource(JID))),
SNick = ejabberd_odbc:escape(Nick),
SHost = ejabberd_odbc:escape(Host),
case catch ejabberd_odbc:sql_query(LServer,
[<<"select jid from muc_registered ">>,
<<"where nick='">>, SNick,
<<"' and host='">>, SHost, <<"';">>])
of
{selected, [<<"jid">>], [[SJID1]]} -> SJID == SJID1;
_ -> true
end.
%%====================================================================
%% gen_server callbacks
%%====================================================================
%%--------------------------------------------------------------------
%% Function: init(Args) -> {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%% Description: Initiates the server
%%--------------------------------------------------------------------
init([Host, Opts]) ->
MyHost = gen_mod:get_opt_host(Host, Opts,
<<"conference.@HOST@">>),
case gen_mod:db_type(Opts) of
mnesia ->
mnesia:create_table(muc_room,
[{disc_copies, [node()]},
{attributes,
record_info(fields, muc_room)}]),
mnesia:create_table(muc_registered,
[{disc_copies, [node()]},
{attributes,
record_info(fields, muc_registered)}]),
update_tables(MyHost),
mnesia:add_table_index(muc_registered, nick);
_ ->
ok
end,
mnesia:create_table(muc_online_room,
[{ram_copies, [node()]},
{attributes, record_info(fields, muc_online_room)}]),
mnesia:add_table_copy(muc_online_room, node(), ram_copies),
catch ets:new(muc_online_users, [bag, named_table, public, {keypos, 2}]),
clean_table_from_bad_node(node(), MyHost),
mnesia:subscribe(system),
Access = gen_mod:get_opt(access, Opts, fun(A) -> A end, all),
AccessCreate = gen_mod:get_opt(access_create, Opts, fun(A) -> A end, all),
AccessAdmin = gen_mod:get_opt(access_admin, Opts, fun(A) -> A end, none),
AccessPersistent = gen_mod:get_opt(access_persistent, Opts, fun(A) -> A end, all),
HistorySize = gen_mod:get_opt(history_size, Opts, fun(A) -> A end, 20),
DefRoomOpts = gen_mod:get_opt(default_room_options, Opts, fun(A) -> A end, []),
RoomShaper = gen_mod:get_opt(room_shaper, Opts, fun(A) -> A end, none),
ejabberd_router:register_route(MyHost),
load_permanent_rooms(MyHost, Host,
{Access, AccessCreate, AccessAdmin, AccessPersistent},
HistorySize,
RoomShaper),
{ok, #state{host = MyHost,
server_host = Host,
access = {Access, AccessCreate, AccessAdmin, AccessPersistent},
default_room_opts = DefRoomOpts,
history_size = HistorySize,
room_shaper = RoomShaper}}.
%%--------------------------------------------------------------------
%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} |
%% {stop, Reason, State}
%% Description: Handling call messages
%%--------------------------------------------------------------------
handle_call(stop, _From, State) ->
{stop, normal, ok, State};
handle_call({create, Room, From, Nick, Opts}, _From,
#state{host = Host, server_host = ServerHost,
access = Access, default_room_opts = DefOpts,
history_size = HistorySize,
room_shaper = RoomShaper} = State) ->
?DEBUG("MUC: create new room '~s'~n", [Room]),
NewOpts = case Opts of
default -> DefOpts;
_ -> Opts
end,
{ok, Pid} = mod_muc_room:start(
Host, ServerHost, Access,
Room, HistorySize,
RoomShaper, From,
Nick, NewOpts),
register_room(Host, Room, Pid),
{reply, ok, State}.
%%--------------------------------------------------------------------
%% Function: handle_cast(Msg, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling cast messages
%%--------------------------------------------------------------------
handle_cast(_Msg, State) -> {noreply, State}.
%%--------------------------------------------------------------------
%% Function: handle_info(Info, State) -> {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State}
%% Description: Handling all non call/cast messages
%%--------------------------------------------------------------------
handle_info({route, From, To, Packet},
#state{host = Host, server_host = ServerHost,
access = Access, default_room_opts = DefRoomOpts,
history_size = HistorySize,
room_shaper = RoomShaper} = State) ->
case catch do_route(Host, ServerHost, Access, HistorySize, RoomShaper,
From, To, Packet, DefRoomOpts) of
{'EXIT', Reason} ->
?ERROR_MSG("~p", [Reason]);
_ ->
ok
end,
{noreply, State};
handle_info({room_destroyed, RoomHost, Pid}, State) ->
F = fun () ->
mnesia:delete_object(#muc_online_room{name_host =
RoomHost,
pid = Pid})
end,
mnesia:transaction(F),
{noreply, State};
handle_info({mnesia_system_event, {mnesia_down, Node}}, State) ->
clean_table_from_bad_node(Node),
{noreply, State};
handle_info(_Info, State) -> {noreply, State}.
%%--------------------------------------------------------------------
%% Function: terminate(Reason, State) -> void()
%% Description: This function is called by a gen_server when it is about to
%% terminate. It should be the opposite of Module:init/1 and do any necessary
%% cleaning up. When it returns, the gen_server terminates with Reason.
%% The return value is ignored.
%%--------------------------------------------------------------------
terminate(_Reason, State) ->
ejabberd_router:unregister_route(State#state.host),
ok.
%%--------------------------------------------------------------------
%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
%% Description: Convert process state when code is changed
%%--------------------------------------------------------------------
code_change(_OldVsn, State, _Extra) -> {ok, State}.
%%--------------------------------------------------------------------
%%% Internal functions
%%--------------------------------------------------------------------
start_supervisor(Host) ->
Proc = gen_mod:get_module_proc(Host,
ejabberd_mod_muc_sup),
ChildSpec = {Proc,
{ejabberd_tmp_sup, start_link, [Proc, mod_muc_room]},
permanent, infinity, supervisor, [ejabberd_tmp_sup]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop_supervisor(Host) ->
Proc = gen_mod:get_module_proc(Host,
ejabberd_mod_muc_sup),
supervisor:terminate_child(ejabberd_sup, Proc),
supervisor:delete_child(ejabberd_sup, Proc).
do_route(Host, ServerHost, Access, HistorySize, RoomShaper,
From, To, Packet, DefRoomOpts) ->
{AccessRoute, _AccessCreate, _AccessAdmin, _AccessPersistent} = Access,
case acl:match_rule(ServerHost, AccessRoute, From) of
allow ->
do_route1(Host, ServerHost, Access, HistorySize, RoomShaper,
From, To, Packet, DefRoomOpts);
_ ->
#xmlel{attrs = Attrs} = Packet,
Lang = xml:get_attr_s(<<"xml:lang">>, Attrs),
ErrText = <<"Access denied by service policy">>,
Err = jlib:make_error_reply(Packet,
?ERRT_FORBIDDEN(Lang, ErrText)),
ejabberd_router:route_error(To, From, Err, Packet)
end.
do_route1(Host, ServerHost, Access, HistorySize, RoomShaper,
From, To, Packet, DefRoomOpts) ->
{_AccessRoute, AccessCreate, AccessAdmin, _AccessPersistent} = Access,
{Room, _, Nick} = jlib:jid_tolower(To),
#xmlel{name = Name, attrs = Attrs} = Packet,
case Room of
<<"">> ->
case Nick of
<<"">> ->
case Name of
<<"iq">> ->
case jlib:iq_query_info(Packet) of
#iq{type = get, xmlns = (?NS_DISCO_INFO) = XMLNS,
sub_el = _SubEl, lang = Lang} =
IQ ->
Info = ejabberd_hooks:run_fold(disco_info,
ServerHost, [],
[ServerHost, ?MODULE,
<<"">>, <<"">>]),
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"query">>,
attrs =
[{<<"xmlns">>, XMLNS}],
children =
iq_disco_info(Lang) ++
Info}]},
ejabberd_router:route(To, From,
jlib:iq_to_xml(Res));
#iq{type = get, xmlns = ?NS_DISCO_ITEMS} = IQ ->
spawn(?MODULE, process_iq_disco_items,
[Host, From, To, IQ]);
#iq{type = get, xmlns = (?NS_REGISTER) = XMLNS,
lang = Lang, sub_el = _SubEl} =
IQ ->
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"query">>,
attrs =
[{<<"xmlns">>, XMLNS}],
children =
iq_get_register_info(ServerHost,
Host,
From,
Lang)}]},
ejabberd_router:route(To, From,
jlib:iq_to_xml(Res));
#iq{type = set, xmlns = (?NS_REGISTER) = XMLNS,
lang = Lang, sub_el = SubEl} =
IQ ->
case process_iq_register_set(ServerHost, Host, From,
SubEl, Lang)
of
{result, IQRes} ->
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"query">>,
attrs =
[{<<"xmlns">>,
XMLNS}],
children = IQRes}]},
ejabberd_router:route(To, From,
jlib:iq_to_xml(Res));
{error, Error} ->
Err = jlib:make_error_reply(Packet, Error),
ejabberd_router:route(To, From, Err)
end;
#iq{type = get, xmlns = (?NS_VCARD) = XMLNS,
lang = Lang, sub_el = _SubEl} =
IQ ->
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"vCard">>,
attrs =
[{<<"xmlns">>, XMLNS}],
children =
iq_get_vcard(Lang)}]},
ejabberd_router:route(To, From,
jlib:iq_to_xml(Res));
#iq{type = get, xmlns = ?NS_MUC_UNIQUE} = IQ ->
Res = IQ#iq{type = result,
sub_el =
[#xmlel{name = <<"unique">>,
attrs =
[{<<"xmlns">>,
?NS_MUC_UNIQUE}],
children =
[iq_get_unique(From)]}]},
ejabberd_router:route(To, From,
jlib:iq_to_xml(Res));
#iq{} ->
Err = jlib:make_error_reply(Packet,
?ERR_FEATURE_NOT_IMPLEMENTED),
ejabberd_router:route(To, From, Err);
_ -> ok
end;
<<"message">> ->
case xml:get_attr_s(<<"type">>, Attrs) of
<<"error">> -> ok;
_ ->
case acl:match_rule(ServerHost, AccessAdmin, From)
of
allow ->
Msg = xml:get_path_s(Packet,
[{elem, <<"body">>},
cdata]),
broadcast_service_message(Host, Msg);
_ ->
Lang = xml:get_attr_s(<<"xml:lang">>, Attrs),
ErrText =
<<"Only service administrators are allowed "
"to send service messages">>,
Err = jlib:make_error_reply(Packet,
?ERRT_FORBIDDEN(Lang,
ErrText)),
ejabberd_router:route(To, From, Err)
end
end;
<<"presence">> -> ok
end;
_ ->
case xml:get_attr_s(<<"type">>, Attrs) of
<<"error">> -> ok;
<<"result">> -> ok;
_ ->
Err = jlib:make_error_reply(
Packet, ?ERR_ITEM_NOT_FOUND),
ejabberd_router:route(To, From, Err)
end
end;
_ ->
case mnesia:dirty_read(muc_online_room, {Room, Host}) of
[] ->
Type = xml:get_attr_s(<<"type">>, Attrs),
case {Name, Type} of
{<<"presence">>, <<"">>} ->
case check_user_can_create_room(ServerHost,
AccessCreate, From,
Room) of
true ->
{ok, Pid} = start_new_room(
Host, ServerHost, Access,
Room, HistorySize,
RoomShaper, From,
Nick, DefRoomOpts),
register_room(Host, Room, Pid),
mod_muc_room:route(Pid, From, Nick, Packet),
ok;
false ->
Lang = xml:get_attr_s(<<"xml:lang">>, Attrs),
ErrText = <<"Room creation is denied by service policy">>,
Err = jlib:make_error_reply(
Packet, ?ERRT_FORBIDDEN(Lang, ErrText)),
ejabberd_router:route(To, From, Err)
end;
_ ->
Lang = xml:get_attr_s(<<"xml:lang">>, Attrs),
ErrText = <<"Conference room does not exist">>,
Err = jlib:make_error_reply(Packet,
?ERRT_ITEM_NOT_FOUND(Lang,
ErrText)),
ejabberd_router:route(To, From, Err)
end;
[R] ->
Pid = R#muc_online_room.pid,
?DEBUG("MUC: send to process ~p~n", [Pid]),
mod_muc_room:route(Pid, From, Nick, Packet),
ok
end
end.
check_user_can_create_room(ServerHost, AccessCreate,
From, RoomID) ->
case acl:match_rule(ServerHost, AccessCreate, From) of
allow ->
byte_size(RoomID) =<
gen_mod:get_module_opt(ServerHost, ?MODULE, max_room_id,
fun(infinity) -> infinity;
(I) when is_integer(I), I>0 -> I
end, infinity);
_ -> false
end.
get_rooms(ServerHost, Host) ->
LServer = jlib:nameprep(ServerHost),
get_rooms(LServer, Host,
gen_mod:db_type(LServer, ?MODULE)).
get_rooms(_LServer, Host, mnesia) ->
case catch mnesia:dirty_select(muc_room,
[{#muc_room{name_host = {'_', Host},
_ = '_'},
[], ['$_']}])
of
{'EXIT', Reason} -> ?ERROR_MSG("~p", [Reason]), [];
Rs -> Rs
end;
get_rooms(LServer, Host, odbc) ->
SHost = ejabberd_odbc:escape(Host),
case catch ejabberd_odbc:sql_query(LServer,
[<<"select name, opts from muc_room ">>,
<<"where host='">>, SHost, <<"';">>])
of
{selected, [<<"name">>, <<"opts">>], RoomOpts} ->
lists:map(fun ([Room, Opts]) ->
#muc_room{name_host = {Room, Host},
opts = opts_to_binary(
ejabberd_odbc:decode_term(Opts))}
end,
RoomOpts);
Err -> ?ERROR_MSG("failed to get rooms: ~p", [Err]), []
end.
load_permanent_rooms(Host, ServerHost, Access, HistorySize, RoomShaper) ->
lists:foreach(
fun(R) ->
{Room, Host} = R#muc_room.name_host,
case mnesia:dirty_read(muc_online_room, {Room, Host}) of
[] ->
{ok, Pid} = mod_muc_room:start(
Host,
ServerHost,
Access,
Room,
HistorySize,
RoomShaper,
R#muc_room.opts),
register_room(Host, Room, Pid);
_ ->
ok
end
end, get_rooms(ServerHost, Host)).
start_new_room(Host, ServerHost, Access, Room,
HistorySize, RoomShaper, From,
Nick, DefRoomOpts) ->
case restore_room(ServerHost, Room, Host) of
error ->
?DEBUG("MUC: open new room '~s'~n", [Room]),
mod_muc_room:start(Host, ServerHost, Access,
Room, HistorySize,
RoomShaper, From,
Nick, DefRoomOpts);
Opts ->
?DEBUG("MUC: restore room '~s'~n", [Room]),
mod_muc_room:start(Host, ServerHost, Access,
Room, HistorySize,
RoomShaper, Opts)
end.
register_room(Host, Room, Pid) ->
F = fun() ->
mnesia:write(#muc_online_room{name_host = {Room, Host},
pid = Pid})
end,
mnesia:transaction(F).
iq_disco_info(Lang) ->
[#xmlel{name = <<"identity">>,
attrs =
[{<<"category">>, <<"conference">>},
{<<"type">>, <<"text">>},
{<<"name">>,
translate:translate(Lang, <<"Chatrooms">>)}],
children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_DISCO_INFO}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_DISCO_ITEMS}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_MUC}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_MUC_UNIQUE}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_REGISTER}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_RSM}], children = []},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_VCARD}], children = []}].
iq_disco_items(Host, From, Lang, none) ->
lists:zf(fun (#muc_online_room{name_host =
{Name, _Host},
pid = Pid}) ->
case catch gen_fsm:sync_send_all_state_event(Pid,
{get_disco_item,
From, Lang},
100)
of
{item, Desc} ->
flush(),
{true,
#xmlel{name = <<"item">>,
attrs =
[{<<"jid">>,
jlib:jid_to_string({Name, Host,
<<"">>})},
{<<"name">>, Desc}],
children = []}};
_ -> false
end
end, get_vh_rooms(Host));
iq_disco_items(Host, From, Lang, Rsm) ->
{Rooms, RsmO} = get_vh_rooms(Host, Rsm),
RsmOut = jlib:rsm_encode(RsmO),
lists:zf(fun (#muc_online_room{name_host =
{Name, _Host},
pid = Pid}) ->
case catch gen_fsm:sync_send_all_state_event(Pid,
{get_disco_item,
From, Lang},
100)
of
{item, Desc} ->
flush(),
{true,
#xmlel{name = <<"item">>,
attrs =
[{<<"jid">>,
jlib:jid_to_string({Name, Host,
<<"">>})},
{<<"name">>, Desc}],
children = []}};
_ -> false
end
end,
Rooms)
++ RsmOut.
get_vh_rooms(Host, #rsm_in{max=M, direction=Direction, id=I, index=Index})->
AllRooms = lists:sort(get_vh_rooms(Host)),
Count = erlang:length(AllRooms),
Guard = case Direction of
_ when Index =/= undefined -> [{'==', {element, 2, '$1'}, Host}];
aft -> [{'==', {element, 2, '$1'}, Host}, {'>=',{element, 1, '$1'} ,I}];
before when I =/= []-> [{'==', {element, 2, '$1'}, Host}, {'=<',{element, 1, '$1'} ,I}];
_ -> [{'==', {element, 2, '$1'}, Host}]
end,
L = lists:sort(
mnesia:dirty_select(muc_online_room,
[{#muc_online_room{name_host = '$1', _ = '_'},
Guard,
['$_']}])),
L2 = if
Index == undefined andalso Direction == before ->
lists:reverse(lists:sublist(lists:reverse(L), 1, M));
Index == undefined ->
lists:sublist(L, 1, M);
Index > Count orelse Index < 0 ->
[];
true ->
lists:sublist(L, Index+1, M)
end,
if L2 == [] -> {L2, #rsm_out{count = Count}};
true ->
H = hd(L2),
NewIndex = get_room_pos(H, AllRooms),
T = lists:last(L2),
{F, _} = H#muc_online_room.name_host,
{Last, _} = T#muc_online_room.name_host,
{L2,
#rsm_out{first = F, last = Last, count = Count,
index = NewIndex}}
end.
%% @doc Return the position of desired room in the list of rooms.
%% The room must exist in the list. The count starts in 0.
%% @spec (Desired::muc_online_room(), Rooms::[muc_online_room()]) -> integer()
get_room_pos(Desired, Rooms) ->
get_room_pos(Desired, Rooms, 0).
get_room_pos(Desired, [HeadRoom | _], HeadPosition)
when Desired#muc_online_room.name_host ==
HeadRoom#muc_online_room.name_host ->
HeadPosition;
get_room_pos(Desired, [_ | Rooms], HeadPosition) ->
get_room_pos(Desired, Rooms, HeadPosition + 1).
flush() -> receive _ -> flush() after 0 -> ok end.
-define(XFIELD(Type, Label, Var, Val),
%% @doc Get a pseudo unique Room Name. The Room Name is generated as a hash of
%% the requester JID, the local time and a random salt.
%%
%% "pseudo" because we don't verify that there is not a room
%% with the returned Name already created, nor mark the generated Name
%% as "already used". But in practice, it is unique enough. See
%% http://xmpp.org/extensions/xep-0045.html#createroom-unique
#xmlel{name = <<"field">>,
attrs =
[{<<"type">>, Type},
{<<"label">>, translate:translate(Lang, Label)},
{<<"var">>, Var}],
children =
[#xmlel{name = <<"value">>, attrs = [],
children = [{xmlcdata, Val}]}]}).
iq_get_unique(From) ->
{xmlcdata,
p1_sha:sha(term_to_binary([From, now(),
randoms:get_string()]))}.
get_nick(ServerHost, Host, From) ->
LServer = jlib:nameprep(ServerHost),
get_nick(LServer, Host, From,
gen_mod:db_type(LServer, ?MODULE)).
get_nick(_LServer, Host, From, mnesia) ->
{LUser, LServer, _} = jlib:jid_tolower(From),
LUS = {LUser, LServer},
case catch mnesia:dirty_read(muc_registered,
{LUS, Host})
of
{'EXIT', _Reason} -> error;
[] -> error;
[#muc_registered{nick = Nick}] -> Nick
end;
get_nick(LServer, Host, From, odbc) ->
SJID =
ejabberd_odbc:escape(jlib:jid_to_string(jlib:jid_tolower(jlib:jid_remove_resource(From)))),
SHost = ejabberd_odbc:escape(Host),
case catch ejabberd_odbc:sql_query(LServer,
[<<"select nick from muc_registered where "
"jid='">>,
SJID, <<"' and host='">>, SHost,
<<"';">>])
of
{selected, [<<"nick">>], [[Nick]]} -> Nick;
_ -> error
end.
iq_get_register_info(ServerHost, Host, From, Lang) ->
{Nick, Registered} = case get_nick(ServerHost, Host,
From)
of
error -> {<<"">>, []};
N ->
{N,
[#xmlel{name = <<"registered">>, attrs = [],
children = []}]}
end,
Registered ++
[#xmlel{name = <<"instructions">>, attrs = [],
children =
[{xmlcdata,
translate:translate(Lang,
<<"You need a client that supports x:data "
"to register the nickname">>)}]},
#xmlel{name = <<"x">>,
attrs = [{<<"xmlns">>, ?NS_XDATA}],
children =
[#xmlel{name = <<"title">>, attrs = [],
children =
[{xmlcdata,
<<(translate:translate(Lang,
<<"Nickname Registration at ">>))/binary,
Host/binary>>}]},
#xmlel{name = <<"instructions">>, attrs = [],
children =
[{xmlcdata,
translate:translate(Lang,
<<"Enter nickname you want to register">>)}]},
?XFIELD(<<"text-single">>, <<"Nickname">>, <<"nick">>,
Nick)]}].
set_nick(ServerHost, Host, From, Nick) ->
LServer = jlib:nameprep(ServerHost),
set_nick(LServer, Host, From, Nick,
gen_mod:db_type(LServer, ?MODULE)).
set_nick(_LServer, Host, From, Nick, mnesia) ->
{LUser, LServer, _} = jlib:jid_tolower(From),
LUS = {LUser, LServer},
F = fun () ->
case Nick of
<<"">> ->
mnesia:delete({muc_registered, {LUS, Host}}), ok;
_ ->
Allow = case mnesia:select(muc_registered,
[{#muc_registered{us_host =
'$1',
nick = Nick,
_ = '_'},
[{'==', {element, 2, '$1'},
Host}],
['$_']}])
of
[] -> true;
[#muc_registered{us_host = {U, _Host}}] ->
U == LUS
end,
if Allow ->
mnesia:write(#muc_registered{us_host = {LUS, Host},
nick = Nick}),
ok;
true -> false
end
end
end,
mnesia:transaction(F);
set_nick(LServer, Host, From, Nick, odbc) ->
JID =
jlib:jid_to_string(jlib:jid_tolower(jlib:jid_remove_resource(From))),
SJID = ejabberd_odbc:escape(JID),
SNick = ejabberd_odbc:escape(Nick),
SHost = ejabberd_odbc:escape(Host),
F = fun () ->
case Nick of
<<"">> ->
ejabberd_odbc:sql_query_t([<<"delete from muc_registered where ">>,
<<"jid='">>, SJID,
<<"' and host='">>, Host,
<<"';">>]),
ok;
_ ->
Allow = case
ejabberd_odbc:sql_query_t([<<"select jid from muc_registered ">>,
<<"where nick='">>,
SNick,
<<"' and host='">>,
SHost, <<"';">>])
of
{selected, [<<"jid">>], [[J]]} -> J == JID;
_ -> true
end,
if Allow ->
odbc_queries:update_t(<<"muc_registered">>,
[<<"jid">>, <<"host">>,
<<"nick">>],
[SJID, SHost, SNick],
[<<"jid='">>, SJID,
<<"' and host='">>, SHost,
<<"'">>]),
ok;
true -> false
end
end
end,
ejabberd_odbc:sql_transaction(LServer, F).
iq_set_register_info(ServerHost, Host, From, Nick,
Lang) ->
case set_nick(ServerHost, Host, From, Nick) of
{atomic, ok} -> {result, []};
{atomic, false} ->
ErrText = <<"That nickname is registered by another "
"person">>,
{error, ?ERRT_CONFLICT(Lang, ErrText)};
_ -> {error, ?ERR_INTERNAL_SERVER_ERROR}
end.
process_iq_register_set(ServerHost, Host, From, SubEl,
Lang) ->
#xmlel{children = Els} = SubEl,
case xml:get_subtag(SubEl, <<"remove">>) of
false ->
case xml:remove_cdata(Els) of
[#xmlel{name = <<"x">>} = XEl] ->
case {xml:get_tag_attr_s(<<"xmlns">>, XEl),
xml:get_tag_attr_s(<<"type">>, XEl)}
of
{?NS_XDATA, <<"cancel">>} -> {result, []};
{?NS_XDATA, <<"submit">>} ->
XData = jlib:parse_xdata_submit(XEl),
case XData of
invalid -> {error, ?ERR_BAD_REQUEST};
_ ->
case lists:keysearch(<<"nick">>, 1, XData) of
{value, {_, [Nick]}} when Nick /= <<"">> ->
iq_set_register_info(ServerHost, Host, From,
Nick, Lang);
_ ->
ErrText =
<<"You must fill in field \"Nickname\" "
"in the form">>,
{error, ?ERRT_NOT_ACCEPTABLE(Lang, ErrText)}
end
end;
_ -> {error, ?ERR_BAD_REQUEST}
end;
_ -> {error, ?ERR_BAD_REQUEST}
end;
_ ->
iq_set_register_info(ServerHost, Host, From, <<"">>,
Lang)
end.
iq_get_vcard(Lang) ->
[#xmlel{name = <<"FN">>, attrs = [],
children = [{xmlcdata, <<"ejabberd/mod_muc">>}]},
#xmlel{name = <<"URL">>, attrs = [],
children = [{xmlcdata, ?EJABBERD_URI}]},
#xmlel{name = <<"DESC">>, attrs = [],
children =
[{xmlcdata,
<<(translate:translate(Lang,
<<"ejabberd MUC module">>))/binary,
"\nCopyright (c) 2003-2013 ProcessOne">>}]}].
broadcast_service_message(Host, Msg) ->
lists:foreach(
fun(#muc_online_room{pid = Pid}) ->
gen_fsm:send_all_state_event(
Pid, {service_message, Msg})
end, get_vh_rooms(Host)).
get_vh_rooms(Host) ->
mnesia:dirty_select(muc_online_room,
[{#muc_online_room{name_host = '$1', _ = '_'},
[{'==', {element, 2, '$1'}, Host}],
['$_']}]).
clean_table_from_bad_node(Node) ->
F = fun() ->
Es = mnesia:select(
muc_online_room,
[{#muc_online_room{pid = '$1', _ = '_'},
[{'==', {node, '$1'}, Node}],
['$_']}]),
lists:foreach(fun(E) ->
mnesia:delete_object(E)
end, Es)
end,
mnesia:async_dirty(F).
clean_table_from_bad_node(Node, Host) ->
F = fun() ->
Es = mnesia:select(
muc_online_room,
[{#muc_online_room{pid = '$1',
name_host = {'_', Host},
_ = '_'},
[{'==', {node, '$1'}, Node}],
['$_']}]),
lists:foreach(fun(E) ->
mnesia:delete_object(E)
end, Es)
end,
mnesia:async_dirty(F).
opts_to_binary(Opts) ->
lists:map(
fun({title, Title}) ->
{title, iolist_to_binary(Title)};
({description, Desc}) ->
{description, iolist_to_binary(Desc)};
({password, Pass}) ->
{password, iolist_to_binary(Pass)};
({subject, Subj}) ->
{subject, iolist_to_binary(Subj)};
({subject_author, Author}) ->
{subject_author, iolist_to_binary(Author)};
({affiliations, Affs}) ->
{affiliations, lists:map(
fun({{U, S, R}, Aff}) ->
NewAff =
case Aff of
{A, Reason} ->
{A, iolist_to_binary(Reason)};
_ ->
Aff
end,
{{iolist_to_binary(U),
iolist_to_binary(S),
iolist_to_binary(R)},
NewAff}
end, Affs)};
({captcha_whitelist, CWList}) ->
{captcha_whitelist, lists:map(
fun({U, S, R}) ->
{iolist_to_binary(U),
iolist_to_binary(S),
iolist_to_binary(R)}
end, CWList)};
(Opt) ->
Opt
end, Opts).
update_tables(Host) ->
update_muc_room_table(Host),
update_muc_registered_table(Host).
update_muc_room_table(_Host) ->
Fields = record_info(fields, muc_room),
case mnesia:table_info(muc_room, attributes) of
Fields ->
ejabberd_config:convert_table_to_binary(
muc_room, Fields, set,
fun(#muc_room{name_host = {N, _}}) -> N end,
fun(#muc_room{name_host = {N, H},
opts = Opts} = R) ->
R#muc_room{name_host = {iolist_to_binary(N),
iolist_to_binary(H)},
opts = opts_to_binary(Opts)}
end);
_ ->
?INFO_MSG("Recreating muc_room table", []),
mnesia:transform_table(muc_room, ignore, Fields)
end.
update_muc_registered_table(_Host) ->
Fields = record_info(fields, muc_registered),
case mnesia:table_info(muc_registered, attributes) of
Fields ->
ejabberd_config:convert_table_to_binary(
muc_registered, Fields, set,
fun(#muc_registered{us_host = {_, H}}) -> H end,
fun(#muc_registered{us_host = {{U, S}, H},
nick = Nick} = R) ->
R#muc_registered{us_host = {{iolist_to_binary(U),
iolist_to_binary(S)},
iolist_to_binary(H)},
nick = iolist_to_binary(Nick)}
end);
_ ->
?INFO_MSG("Recreating muc_registered table", []),
mnesia:transform_table(muc_registered, ignore, Fields)
end.
export(_Server) ->
[{muc_room,
fun(Host, #muc_room{name_host = {Name, RoomHost}, opts = Opts}) ->
case str:suffix(Host, RoomHost) of
true ->
SName = ejabberd_odbc:escape(Name),
SRoomHost = ejabberd_odbc:escape(RoomHost),
SOpts = ejabberd_odbc:encode_term(Opts),
[[<<"delete from muc_room where name='">>, SName,
<<"' and host='">>, SRoomHost, <<"';">>],
[<<"insert into muc_room(name, host, opts) ",
"values (">>,
<<"'">>, SName, <<"', '">>, SRoomHost,
<<"', '">>, SOpts, <<"');">>]];
false ->
[]
end
end},
{muc_registered,
fun(Host, #muc_registered{us_host = {{U, S}, RoomHost},
nick = Nick}) ->
case str:suffix(Host, RoomHost) of
true ->
SJID = ejabberd_odbc:escape(
jlib:jid_to_string(
jlib:make_jid(U, S, <<"">>))),
SNick = ejabberd_odbc:escape(Nick),
SRoomHost = ejabberd_odbc:escape(RoomHost),
[[<<"delete from muc_registered where jid='">>,
SJID, <<"' and host='">>, SRoomHost, <<"';">>],
[<<"insert into muc_registered(jid, host, "
"nick) values ('">>,
SJID, <<"', '">>, SRoomHost, <<"', '">>, SNick,
<<"');">>]];
false ->
[]
end
end}].
import(_LServer) ->
[{<<"select name, host, opts from muc_room;">>,
fun([Name, RoomHost, SOpts]) ->
Opts = opts_to_binary(ejabberd_odbc:decode_term(SOpts)),
#muc_room{name_host = {Name, RoomHost},
opts = Opts}
end},
{<<"select jid, host, nick from muc_registered;">>,
fun([J, RoomHost, Nick]) ->
#jid{user = U, server = S} =
jlib:string_to_jid(J),
#muc_registered{us_host = {{U, S}, RoomHost},
nick = Nick}
end}].
import(_LServer, mnesia, #muc_room{} = R) ->
mnesia:dirty_write(R);
import(_LServer, mnesia, #muc_registered{} = R) ->
mnesia:dirty_write(R);
import(_, _, _) ->
pass.
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