%%%---------------------------------------------------------------------- %%% File : ejabberd_local.erl %%% Author : Alexey Shchepin %%% Purpose : Route local packets %%% Created : 30 Nov 2002 by Alexey Shchepin %%% %%% %%% ejabberd, Copyright (C) 2002-2008 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(ejabberd_local). -author('alexey@process-one.net'). -behaviour(gen_server). %% API -export([start_link/0]). -export([route/3, register_iq_handler/4, register_iq_handler/5, register_iq_response_handler/4, unregister_iq_handler/2, unregister_iq_response_handler/2, refresh_iq_handlers/0, bounce_resource_packet/3 ]). %% gen_server callbacks -export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]). -include("ejabberd.hrl"). -include("jlib.hrl"). -record(state, {}). -record(iq_response, {id, module, function}). -define(IQTABLE, local_iqtable). %%==================================================================== %% API %%==================================================================== %%-------------------------------------------------------------------- %% Function: start_link() -> {ok,Pid} | ignore | {error,Error} %% Description: Starts the server %%-------------------------------------------------------------------- start_link() -> gen_server:start_link({local, ?MODULE}, ?MODULE, [], []). process_iq(From, To, Packet) -> IQ = jlib:iq_query_info(Packet), case IQ of #iq{xmlns = XMLNS} -> Host = To#jid.lserver, case ets:lookup(?IQTABLE, {XMLNS, Host}) of [{_, Module, Function}] -> ResIQ = Module:Function(From, To, IQ), if ResIQ /= ignore -> ejabberd_router:route( To, From, jlib:iq_to_xml(ResIQ)); true -> ok end; [{_, Module, Function, Opts}] -> gen_iq_handler:handle(Host, Module, Function, Opts, From, To, IQ); [] -> Err = jlib:make_error_reply( Packet, ?ERR_FEATURE_NOT_IMPLEMENTED), ejabberd_router:route(To, From, Err) end; reply -> process_iq_reply(From, To, Packet); _ -> Err = jlib:make_error_reply(Packet, ?ERR_BAD_REQUEST), ejabberd_router:route(To, From, Err), ok end. process_iq_reply(From, To, Packet) -> IQ = jlib:iq_query_or_response_info(Packet), #iq{id = ID} = IQ, case catch mnesia:dirty_read(iq_response, ID) of [] -> ok; _ -> F = fun() -> case mnesia:read({iq_response, ID}) of [] -> nothing; [#iq_response{module = Module, function = Function}] -> mnesia:delete({iq_response, ID}), {Module, Function} end end, case mnesia:transaction(F) of {atomic, {Module, Function}} -> Module:Function(From, To, IQ); _ -> ok end end. route(From, To, Packet) -> case catch do_route(From, To, Packet) of {'EXIT', Reason} -> ?ERROR_MSG("~p~nwhen processing: ~p", [Reason, {From, To, Packet}]); _ -> ok end. register_iq_response_handler(Host, ID, Module, Fun) -> ejabberd_local ! {register_iq_response_handler, Host, ID, Module, Fun}. register_iq_handler(Host, XMLNS, Module, Fun) -> ejabberd_local ! {register_iq_handler, Host, XMLNS, Module, Fun}. register_iq_handler(Host, XMLNS, Module, Fun, Opts) -> ejabberd_local ! {register_iq_handler, Host, XMLNS, Module, Fun, Opts}. unregister_iq_response_handler(Host, ID) -> ejabberd_local ! {unregister_iq_response_handler, Host, ID}. unregister_iq_handler(Host, XMLNS) -> ejabberd_local ! {unregister_iq_handler, Host, XMLNS}. refresh_iq_handlers() -> ejabberd_local ! refresh_iq_handlers. bounce_resource_packet(From, To, Packet) -> Err = jlib:make_error_reply(Packet, ?ERR_ITEM_NOT_FOUND), ejabberd_router:route(To, From, Err), stop. %%==================================================================== %% gen_server callbacks %%==================================================================== %%-------------------------------------------------------------------- %% Function: init(Args) -> {ok, State} | %% {ok, State, Timeout} | %% ignore | %% {stop, Reason} %% Description: Initiates the server %%-------------------------------------------------------------------- init([]) -> lists:foreach( fun(Host) -> ejabberd_router:register_route(Host, {apply, ?MODULE, route}), ejabberd_hooks:add(local_send_to_resource_hook, Host, ?MODULE, bounce_resource_packet, 100) end, ?MYHOSTS), catch ets:new(?IQTABLE, [named_table, public]), mnesia:create_table(iq_response, [{ram_copies, [node()]}, {attributes, record_info(fields, iq_response)}]), mnesia:add_table_copy(iq_response, node(), ram_copies), {ok, #state{}}. %%-------------------------------------------------------------------- %% 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(_Request, _From, State) -> Reply = ok, {reply, Reply, 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) -> case catch do_route(From, To, Packet) of {'EXIT', Reason} -> ?ERROR_MSG("~p~nwhen processing: ~p", [Reason, {From, To, Packet}]); _ -> ok end, {noreply, State}; handle_info({register_iq_response_handler, _Host, ID, Module, Function}, State) -> mnesia:dirty_write(#iq_response{id = ID, module = Module, function = Function}), {noreply, State}; handle_info({unregister_iq_response_handler, _Host, ID}, State) -> mnesia:dirty_delete({iq_response, ID}), {noreply, State}; handle_info({register_iq_handler, Host, XMLNS, Module, Function}, State) -> ets:insert(?IQTABLE, {{XMLNS, Host}, Module, Function}), catch mod_disco:register_feature(Host, XMLNS), {noreply, State}; handle_info({register_iq_handler, Host, XMLNS, Module, Function, Opts}, State) -> ets:insert(?IQTABLE, {{XMLNS, Host}, Module, Function, Opts}), catch mod_disco:register_feature(Host, XMLNS), {noreply, State}; handle_info({unregister_iq_handler, Host, XMLNS}, State) -> case ets:lookup(?IQTABLE, {XMLNS, Host}) of [{_, Module, Function, Opts}] -> gen_iq_handler:stop_iq_handler(Module, Function, Opts); _ -> ok end, ets:delete(?IQTABLE, {XMLNS, Host}), catch mod_disco:unregister_feature(Host, XMLNS), {noreply, State}; handle_info(refresh_iq_handlers, State) -> lists:foreach( fun(T) -> case T of {{XMLNS, Host}, _Module, _Function, _Opts} -> catch mod_disco:register_feature(Host, XMLNS); {{XMLNS, Host}, _Module, _Function} -> catch mod_disco:register_feature(Host, XMLNS); _ -> ok end end, ets:tab2list(?IQTABLE)), {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) -> 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 %%-------------------------------------------------------------------- do_route(From, To, Packet) -> ?DEBUG("local route~n\tfrom ~p~n\tto ~p~n\tpacket ~P~n", [From, To, Packet, 8]), if To#jid.luser /= "" -> ejabberd_sm:route(From, To, Packet); To#jid.lresource == "" -> {xmlelement, Name, _Attrs, _Els} = Packet, case Name of "iq" -> process_iq(From, To, Packet); "message" -> ok; "presence" -> ok; _ -> ok end; true -> {xmlelement, _Name, Attrs, _Els} = Packet, case xml:get_attr_s("type", Attrs) of "error" -> ok; "result" -> ok; _ -> ejabberd_hooks:run(local_send_to_resource_hook, To#jid.lserver, [From, To, Packet]) end end.