98 lines
3.5 KiB
Erlang
98 lines
3.5 KiB
Erlang
% Wrapper code, wrapping sctp_handler.erl into OTP gen_server
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% (C) 2011 by Harald Welte <laforge@gnumonks.org>
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% (C) 2011 OnWaves
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%
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% All Rights Reserved
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%
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% This program is free software; you can redistribute it and/or modify
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% it under the terms of the GNU Affero General Public License as
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% published by the Free Software Foundation; either version 3 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
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU Affero General Public License
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% along with this program. If not, see <http://www.gnu.org/licenses/>.
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%
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% Additional Permission under GNU AGPL version 3 section 7:
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%
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% If you modify this Program, or any covered work, by linking or
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% combining it with runtime libraries of Erlang/OTP as released by
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% Ericsson on http://www.erlang.org (or a modified version of these
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% libraries), containing parts covered by the terms of the Erlang Public
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% License (http://www.erlang.org/EPLICENSE), the licensors of this
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% Program grant you additional permission to convey the resulting work
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% without the need to license the runtime libraries of Erlang/OTP under
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% the GNU Affero General Public License. Corresponding Source for a
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% non-source form of such a combination shall include the source code
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% for the parts of the runtime libraries of Erlang/OTP used as well as
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% that of the covered work.
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-module(mgw_nat_usr).
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-author("Harald Welte <laforge@gnumonks.org>").
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-behavior(gen_server).
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-export([start_link/1, stop/0]).
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-export([init/1, handle_cast/2, handle_info/2, terminate/2]).
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start_link(Params) ->
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MscName = get_cfg_pl_val(msc_name, Params),
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gen_server:start_link({local, MscName}, ?MODULE, Params, []).
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stop() ->
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gen_server:cast(?MODULE, stop).
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%% Callback functions of the OTP behavior
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init(Params) ->
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io:format("Starting mgw_nat_usr with Args ~p~n", [Params]),
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MscLocalIp = get_cfg_pl_val(msc_local_ip, Params),
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MscLocalPort = get_cfg_pl_val(msc_local_port, Params),
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MscRemoteIp = get_cfg_pl_val(msc_remote_ip, Params),
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StpLocalIp = proplists:get_value(stp_local_ip, Params),
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StpLocalPort = proplists:get_value(stp_local_port, Params),
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StpRemoteIp = get_cfg_pl_val(stp_remote_ip, Params),
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StpRemotePort = get_cfg_pl_val(stp_remote_port, Params),
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RewriteActMod = get_cfg_pl_val(rewrite_act_mod, Params),
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RewriteActMod:reload_config(),
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SctpHdlrArgs = [
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{msc, {{MscLocalIp, MscLocalPort}, MscRemoteIp}},
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{stp, {{StpLocalIp, StpLocalPort}, {StpRemoteIp, StpRemotePort}}}
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],
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{ok, LoopDat} = apply(sctp_handler, init, [SctpHdlrArgs, RewriteActMod]),
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{ok, {Params, LoopDat}}.
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% this cast is produced by mgw_nat_sup child walker
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handle_cast(reload_config, L = {Params, _LoopData}) ->
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RewriteActMod = get_cfg_pl_val(rewrite_act_mod, Params),
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RewriteActMod:reload_config(),
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{noreply, L};
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handle_cast(stop, LoopData) ->
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{stop, normal, LoopData}.
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terminate(_Reason, _LoopData) ->
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ok.
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% callback for other events like incoming SCTP message
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handle_info({sctp, Sock, Ip, Port, Data}, {InitParams, LoopData}) ->
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NewL = sctp_handler:handle_sctp(LoopData, {sctp, Sock, Ip, Port, Data}),
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{noreply, {InitParams, NewL}}.
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% wrapper around proplists:get_value() to check for missing stuff
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get_cfg_pl_val(Name, List) ->
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case proplists:get_value(Name, List) of
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undefined ->
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error_logger:error_report([{error, app_cfg_missing},
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{get_cfg_pl_val, Name}]);
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Val ->
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Val
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end.
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