-module(tda). -export([start/0, client/1, stop/0]). -define(TIMEOUT, 300000). -define(CONNECT_TIMEOUT, 3000). -define(HOST, "192.168.240.20"). -define(PORT, 33333). start() -> register(tda_client, spawn(?MODULE, client, [{dial, ?HOST, ?PORT}])). stop() -> tda_client ! {logout}. client({dial, Host, Port}) -> io:format("Dial ~p:~p~n", [Host, Port]), Conn = gen_tcp:connect(Host, Port, [binary, {active, once}, {packet, 2}], ?CONNECT_TIMEOUT), client(Conn); client({ok, Sock}) -> io:format("Connected~n", []), tda_client ! {login}, loop(Sock); client({error, Reason}) -> io:format("Error: ~p~n", [Reason]), {error, Reason}. loop(Sock) -> inet:setopts(Sock, [{active, once}]), io:format("Loop~n", []), receive {login} -> io:format("Login~n", []), {ok, Hello} = acse:associate_request(), gen_tcp:send(Sock, Hello), loop(Sock); {logout} -> io:format("Logout~n", []), {ok, Bye} = acse:release_request(), gen_tcp:send(Sock, Bye), loop(Sock); {tcp, Sock, Msg} -> io:format("Reply ~p~n", [Msg]), case decode(Sock, Msg) of ok -> loop(Sock); error -> gen_tcp:close(Sock), error end; {tcp_closed, _} -> io:format("Connection closed~n", []), closed after ?TIMEOUT -> gen_tcp:close(Sock), timeout end. decode(Sock, Msg) -> case dispatch(Msg) of rose -> {ok, Rose} = rose:decode(Msg), io:format("ROSE> ~p~n", [Rose]), {ok, Result} = rose:dispatch(Rose), gen_tcp:send(Sock, Result); acse -> {ok, Acse} = acse:decode(Msg), io:format("ACSE> ~p~n", [Acse]), acse:accepted(Acse) end. dispatch(<>) -> case Head of 96 -> acse; 97 -> acse; 98 -> acse; 99 -> acse; 100 -> acse; 161 -> rose; 162 -> rose end.