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