mirror of
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123 lines
3.5 KiB
Erlang
123 lines
3.5 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_ip_blacklist.erl
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%%% Author : Mickael Remond <mremond@process-one.net>
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%%% Purpose : Download blacklists from ProcessOne
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%%% Created : 5 May 2008 by Mickael Remond <mremond@process-one.net>
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%%% Usage : Add the following line in modules section of ejabberd.cfg:
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%%% {mod_ip_blacklist, []}
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2014 ProcessOne
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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 along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_ip_blacklist).
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-author('mremond@process-one.net').
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-behaviour(gen_mod).
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%% API:
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-export([start/2, preinit/2, init/1, stop/1]).
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-export([update_bl_c2s/0]).
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%% Hooks:
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-export([is_ip_in_c2s_blacklist/2]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-define(PROCNAME, ?MODULE).
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-define(BLC2S,
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<<"http://xaai.process-one.net/bl_c2s.txt">>).
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-define(UPDATE_INTERVAL, 6).
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-record(state, {timer}).
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%% Start once for all vhost
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-record(bl_c2s, {ip = <<"">> :: binary()}).
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start(_Host, _Opts) ->
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Pid = spawn(?MODULE, preinit, [self(), #state{}]),
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receive {ok, Pid, PreinitResult} -> PreinitResult end.
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preinit(Parent, State) ->
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Pid = self(),
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try register(?PROCNAME, Pid) of
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true -> Parent ! {ok, Pid, true}, init(State)
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catch
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error:_ -> Parent ! {ok, Pid, true}
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end.
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%% TODO:
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stop(_Host) -> ok.
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init(State) ->
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ets:new(bl_c2s,
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[named_table, public, {keypos, #bl_c2s.ip}]),
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update_bl_c2s(),
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ejabberd_hooks:add(check_bl_c2s, ?MODULE,
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is_ip_in_c2s_blacklist, 50),
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timer:apply_interval(timer:hours(?UPDATE_INTERVAL),
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?MODULE, update_bl_c2s, []),
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loop(State).
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%% Remove timer when stop is received.
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loop(_State) -> receive stop -> ok end.
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%% Download blacklist file from ProcessOne XAAI
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%% and update the table internal table
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%% TODO: Support comment lines starting by %
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update_bl_c2s() ->
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?INFO_MSG("Updating C2S Blacklist", []),
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case httpc:request(?BLC2S) of
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{ok, 200, _Headers, Body} ->
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IPs = str:tokens(Body, <<"\n">>),
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ets:delete_all_objects(bl_c2s),
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lists:foreach(fun (IP) ->
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ets:insert(bl_c2s,
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#bl_c2s{ip = IP})
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end,
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IPs);
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{error, Reason} ->
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?ERROR_MSG("Cannot download C2S blacklist file. "
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"Reason: ~p",
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[Reason])
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end.
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%% Hook is run with:
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%% ejabberd_hooks:run_fold(check_bl_c2s, false, [IP]),
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%% Return: false: IP not blacklisted
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%% true: IP is blacklisted
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%% IPV4 IP tuple:
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is_ip_in_c2s_blacklist(_Val, IP) when is_tuple(IP) ->
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BinaryIP = jlib:ip_to_list(IP),
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case ets:lookup(bl_c2s, BinaryIP) of
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[] -> %% Not in blacklist
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false;
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[_] -> {stop, true}
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end;
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is_ip_in_c2s_blacklist(_Val, _IP) -> false.
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%% TODO:
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%% - For now, we do not kick user already logged on a given IP after
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%% we update the blacklist.
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