mirror of
https://github.com/processone/ejabberd.git
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300 lines
10 KiB
Erlang
300 lines
10 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_local.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Route local packets
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%%% Created : 30 Nov 2002 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2007 Process-one
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(ejabberd_local).
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-author('alexey@process-one.net').
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-behaviour(gen_server).
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%% API
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-export([start_link/0]).
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-export([route/3,
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register_iq_handler/4,
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register_iq_handler/5,
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register_iq_response_handler/4,
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unregister_iq_handler/2,
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refresh_iq_handlers/0,
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bounce_resource_packet/3
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]).
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%% gen_server callbacks
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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terminate/2, code_change/3]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-record(state, {}).
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-record(iq_response, {id, module, function}).
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-define(IQTABLE, local_iqtable).
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%%====================================================================
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%% API
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%%====================================================================
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%%--------------------------------------------------------------------
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%% Function: start_link() -> {ok,Pid} | ignore | {error,Error}
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%% Description: Starts the server
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%%--------------------------------------------------------------------
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start_link() ->
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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process_iq(From, To, Packet) ->
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IQ = jlib:iq_query_info(Packet),
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case IQ of
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#iq{xmlns = XMLNS} ->
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Host = To#jid.lserver,
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case ets:lookup(?IQTABLE, {XMLNS, Host}) of
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[{_, Module, Function}] ->
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ResIQ = Module:Function(From, To, IQ),
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if
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ResIQ /= ignore ->
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ejabberd_router:route(
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To, From, jlib:iq_to_xml(ResIQ));
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true ->
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ok
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end;
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[{_, Module, Function, Opts}] ->
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gen_iq_handler:handle(Host, Module, Function, Opts,
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From, To, IQ);
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[] ->
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Err = jlib:make_error_reply(
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Packet, ?ERR_FEATURE_NOT_IMPLEMENTED),
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ejabberd_router:route(To, From, Err)
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end;
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reply ->
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process_iq_reply(From, To, Packet);
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_ ->
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Err = jlib:make_error_reply(Packet, ?ERR_BAD_REQUEST),
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ejabberd_router:route(To, From, Err),
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ok
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end.
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process_iq_reply(From, To, Packet) ->
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IQ = jlib:iq_query_or_response_info(Packet),
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#iq{id = ID} = IQ,
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case catch mnesia:dirty_read(iq_response, ID) of
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[] ->
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ok;
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_ ->
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F = fun() ->
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case mnesia:read({iq_response, ID}) of
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[] ->
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nothing;
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[#iq_response{module = Module,
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function = Function}] ->
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mnesia:delete({iq_response, ID}),
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{Module, Function}
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end
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end,
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case mnesia:transaction(F) of
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{atomic, {Module, Function}} ->
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Module:Function(From, To, IQ);
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_ ->
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ok
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end
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end.
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route(From, To, Packet) ->
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case catch do_route(From, To, Packet) of
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{'EXIT', Reason} ->
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?ERROR_MSG("~p~nwhen processing: ~p",
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[Reason, {From, To, Packet}]);
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_ ->
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ok
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end.
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register_iq_response_handler(Host, ID, Module, Fun) ->
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ejabberd_local ! {register_iq_response_handler, Host, ID, Module, Fun}.
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register_iq_handler(Host, XMLNS, Module, Fun) ->
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ejabberd_local ! {register_iq_handler, Host, XMLNS, Module, Fun}.
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register_iq_handler(Host, XMLNS, Module, Fun, Opts) ->
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ejabberd_local ! {register_iq_handler, Host, XMLNS, Module, Fun, Opts}.
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unregister_iq_handler(Host, XMLNS) ->
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ejabberd_local ! {unregister_iq_handler, Host, XMLNS}.
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refresh_iq_handlers() ->
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ejabberd_local ! refresh_iq_handlers.
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bounce_resource_packet(From, To, Packet) ->
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Err = jlib:make_error_reply(Packet, ?ERR_ITEM_NOT_FOUND),
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ejabberd_router:route(To, From, Err),
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stop.
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%%====================================================================
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%% gen_server callbacks
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%%====================================================================
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%%--------------------------------------------------------------------
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%% Function: init(Args) -> {ok, State} |
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%% {ok, State, Timeout} |
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%% ignore |
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%% {stop, Reason}
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%% Description: Initiates the server
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%%--------------------------------------------------------------------
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init([]) ->
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lists:foreach(
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fun(Host) ->
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ejabberd_router:register_route(Host, {apply, ?MODULE, route}),
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ejabberd_hooks:add(local_send_to_resource_hook, Host,
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?MODULE, bounce_resource_packet, 100)
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end, ?MYHOSTS),
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catch ets:new(?IQTABLE, [named_table, public]),
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mnesia:create_table(iq_response,
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[{ram_copies, [node()]},
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{attributes, record_info(fields, iq_response)}]),
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{ok, #state{}}.
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%%--------------------------------------------------------------------
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%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
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%% {reply, Reply, State, Timeout} |
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%% {noreply, State} |
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%% {noreply, State, Timeout} |
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%% {stop, Reason, Reply, State} |
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%% {stop, Reason, State}
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%% Description: Handling call messages
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%%--------------------------------------------------------------------
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handle_call(_Request, _From, State) ->
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Reply = ok,
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{reply, Reply, State}.
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%%--------------------------------------------------------------------
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%% Function: handle_cast(Msg, State) -> {noreply, State} |
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%% {noreply, State, Timeout} |
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%% {stop, Reason, State}
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%% Description: Handling cast messages
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%%--------------------------------------------------------------------
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handle_cast(_Msg, State) ->
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{noreply, State}.
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%%--------------------------------------------------------------------
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%% Function: handle_info(Info, State) -> {noreply, State} |
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%% {noreply, State, Timeout} |
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%% {stop, Reason, State}
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%% Description: Handling all non call/cast messages
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%%--------------------------------------------------------------------
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handle_info({route, From, To, Packet}, State) ->
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case catch do_route(From, To, Packet) of
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{'EXIT', Reason} ->
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?ERROR_MSG("~p~nwhen processing: ~p",
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[Reason, {From, To, Packet}]);
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_ ->
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ok
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end,
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{noreply, State};
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handle_info({register_iq_response_handler, _Host, ID, Module, Function}, State) ->
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mnesia:dirty_write(#iq_response{id = ID, module = Module, function = Function}),
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{noreply, State};
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handle_info({register_iq_handler, Host, XMLNS, Module, Function}, State) ->
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ets:insert(?IQTABLE, {{XMLNS, Host}, Module, Function}),
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catch mod_disco:register_feature(Host, XMLNS),
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{noreply, State};
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handle_info({register_iq_handler, Host, XMLNS, Module, Function, Opts}, State) ->
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ets:insert(?IQTABLE, {{XMLNS, Host}, Module, Function, Opts}),
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catch mod_disco:register_feature(Host, XMLNS),
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{noreply, State};
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handle_info({unregister_iq_handler, Host, XMLNS}, State) ->
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case ets:lookup(?IQTABLE, {XMLNS, Host}) of
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[{_, Module, Function, Opts}] ->
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gen_iq_handler:stop_iq_handler(Module, Function, Opts);
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_ ->
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ok
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end,
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ets:delete(?IQTABLE, {XMLNS, Host}),
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catch mod_disco:unregister_feature(Host, XMLNS),
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{noreply, State};
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handle_info(refresh_iq_handlers, State) ->
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lists:foreach(
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fun(T) ->
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case T of
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{{XMLNS, Host}, _Module, _Function, _Opts} ->
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catch mod_disco:register_feature(Host, XMLNS);
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{{XMLNS, Host}, _Module, _Function} ->
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catch mod_disco:register_feature(Host, XMLNS);
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_ ->
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ok
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end
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end, ets:tab2list(?IQTABLE)),
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{noreply, State};
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handle_info(_Info, State) ->
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{noreply, State}.
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%%--------------------------------------------------------------------
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%% Function: terminate(Reason, State) -> void()
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%% Description: This function is called by a gen_server when it is about to
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%% terminate. It should be the opposite of Module:init/1 and do any necessary
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%% cleaning up. When it returns, the gen_server terminates with Reason.
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%% The return value is ignored.
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%%--------------------------------------------------------------------
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terminate(_Reason, _State) ->
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ok.
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%%--------------------------------------------------------------------
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%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
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%% Description: Convert process state when code is changed
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%%--------------------------------------------------------------------
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code_change(_OldVsn, State, _Extra) ->
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{ok, State}.
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%%--------------------------------------------------------------------
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%%% Internal functions
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%%--------------------------------------------------------------------
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do_route(From, To, Packet) ->
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?DEBUG("local route~n\tfrom ~p~n\tto ~p~n\tpacket ~P~n",
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[From, To, Packet, 8]),
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if
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To#jid.luser /= "" ->
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ejabberd_sm:route(From, To, Packet);
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To#jid.lresource == "" ->
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{xmlelement, Name, _Attrs, _Els} = Packet,
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case Name of
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"iq" ->
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process_iq(From, To, Packet);
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"message" ->
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ok;
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"presence" ->
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ok;
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_ ->
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ok
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end;
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true ->
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{xmlelement, _Name, Attrs, _Els} = Packet,
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case xml:get_attr_s("type", Attrs) of
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"error" -> ok;
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"result" -> ok;
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_ ->
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ejabberd_hooks:run(local_send_to_resource_hook,
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To#jid.lserver,
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[From, To, Packet])
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end
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end.
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