114 lines
2.9 KiB
Erlang
114 lines
2.9 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : stringprep.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Interface to stringprep_drv
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%%% Created : 16 Feb 2003 by Alexey Shchepin <alexey@proces-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(stringprep).
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-author('alexey@process-one.net').
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-behaviour(gen_server).
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-export([start/0, start_link/0,
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tolower/1,
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nameprep/1,
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nodeprep/1,
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resourceprep/1]).
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%% Internal exports, call-back functions.
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-export([init/1,
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handle_call/3,
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handle_cast/2,
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handle_info/2,
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code_change/3,
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terminate/2]).
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-define(STRINGPREP_PORT, stringprep_port).
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-define(NAMEPREP_COMMAND, 1).
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-define(NODEPREP_COMMAND, 2).
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-define(RESOURCEPREP_COMMAND, 3).
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start() ->
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gen_server:start({local, ?MODULE}, ?MODULE, [], []).
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start_link() ->
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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init([]) ->
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case erl_ddll:load_driver(ejabberd:get_so_path(), stringprep_drv) of
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ok -> ok;
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{error, already_loaded} -> ok
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end,
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Port = open_port({spawn, stringprep_drv}, []),
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register(?STRINGPREP_PORT, Port),
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{ok, Port}.
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%%% --------------------------------------------------------
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%%% The call-back functions.
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%%% --------------------------------------------------------
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handle_call(_, _, State) ->
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{noreply, State}.
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handle_cast(_, State) ->
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{noreply, State}.
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handle_info({'EXIT', Port, Reason}, Port) ->
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{stop, {port_died, Reason}, Port};
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handle_info({'EXIT', _Pid, _Reason}, Port) ->
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{noreply, Port};
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handle_info(_, State) ->
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{noreply, State}.
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code_change(_OldVsn, State, _Extra) ->
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{ok, State}.
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terminate(_Reason, Port) ->
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Port ! {self, close},
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ok.
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tolower(String) ->
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control(0, String).
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nameprep(String) ->
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control(?NAMEPREP_COMMAND, String).
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nodeprep(String) ->
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control(?NODEPREP_COMMAND, String).
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resourceprep(String) ->
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control(?RESOURCEPREP_COMMAND, String).
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control(Command, String) ->
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case port_control(?STRINGPREP_PORT, Command, String) of
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[0 | _] -> error;
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[1 | Res] -> Res
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end.
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