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%%% Copyright (c) 2017, NORDUnet A/S.
%%% See LICENSE for licensing information.
-module(plopcontrol).
-export([start_link/0, server_start/2]).
start_link() ->
case gen_tcp:listen(application:get_env(plop, plopcontrolport, 0), [binary, {packet, line},
{active, false},
{ip, {127, 0, 0, 1}}]) of
{ok, ListenSocket} ->
proc_lib:start_link(?MODULE,server_start,[self(), ListenSocket]);
{error,Reason} ->
{error,Reason}
end.
server_start(Parent, ListenSocket) ->
proc_lib:init_ack(Parent, {ok, self()}),
{ok, Port} = inet:port(ListenSocket),
{ok, PlopcontrolFile} = application:get_env(plop, plopcontrol),
atomic:replacefile(PlopcontrolFile, integer_to_list(Port)),
acceptloop(ListenSocket).
acceptloop(ListenSocket) ->
{ok, Socket} = gen_tcp:accept(ListenSocket),
commandloop(Socket),
acceptloop(ListenSocket).
commandloop(Socket) ->
case gen_tcp:recv(Socket, 0) of
{ok, Packet} ->
Answer = command(Packet),
gen_tcp:send(Socket, Answer),
commandloop(Socket);
{error, _Reason} ->
ok
end.
command(<<"reload\n">>) ->
plopconfig:load_config(),
"reload completed\n";
command(<<"configversion\n">>) ->
{ok, ConfigVersion} = plopconfig:get_env(version),
io_lib:format("~w\n", [ConfigVersion]);
command(_) ->
"unknown command\n".
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