* src/ejabberd_service.erl: Bugfix

* src/ejabberd_receiver.erl: Rewritten to use {active, once} mode for socket * src/ejabberd_c2s.erl: Update * src/ejabberd_listener.erl: Likewise * src/ejabberd_s2s_in.erl: Likewise * src/ejabberd_s2s_out.erl: Likewise * src/ejabberd_service.erl: Likewise * src/shaper.erl: Likewise * src/tls/tls.erl: Likewise * src/web/ejabberd_http.erl: Likewise SVN Revision: 483
2024-11-24 16:23:40 +01:00 · 2006-01-13 01:55:20 +00:00 · 2006-01-13 01:55:20 +00:00 · 6bb510d99e
commit 6bb510d99e
parent 8401a5ac55
10 changed files with 280 additions and 100 deletions
--- a/15
+++ b/15
@ -1,3 +1,18 @@
+2006-01-13  Alexey Shchepin  <alexey@sevcom.net>
+
+	* src/ejabberd_service.erl: Bugfix
+
+	* src/ejabberd_receiver.erl: Rewritten to use {active, once} mode
+	for socket
+	* src/ejabberd_c2s.erl: Update
+	* src/ejabberd_listener.erl: Likewise
+	* src/ejabberd_s2s_in.erl: Likewise
+	* src/ejabberd_s2s_out.erl: Likewise
+	* src/ejabberd_service.erl: Likewise
+	* src/shaper.erl: Likewise
+	* src/tls/tls.erl: Likewise
+	* src/web/ejabberd_http.erl: Likewise
+
 2006-01-02  Mickael Remond  <mickael.remond@process-one.net>

 	* src/odbc/ejabberd_odbc.erl: Native MySQL support
--- a/src/ejabberd_c2s.erl
+++ b/src/ejabberd_c2s.erl
@ -17,6 +17,7 @@
 	 start_link/2,
 	 send_text/2,
 	 send_element/2,
+	 become_controller/1,
 	 get_presence/1]).

 %% gen_fsm callbacks
@ -97,6 +98,9 @@ start(SockData, Opts) ->
 start_link(SockData, Opts) ->
    gen_fsm:start_link(ejabberd_c2s, [SockData, Opts], ?FSMOPTS).

+become_controller(Pid) ->
+    gen_fsm:send_all_state_event(Pid, become_controller).
+
 %% Return Username, Resource and presence information
 get_presence(FsmRef) ->
    gen_fsm:sync_send_all_state_event(FsmRef, {get_presence}, 1000).
@ -791,6 +795,12 @@ session_established(closed, StateData) ->
 %%          {next_state, NextStateName, NextStateData, Timeout} |
 %%          {stop, Reason, NewStateData}                         
 %%----------------------------------------------------------------------
+handle_event(become_controller, StateName, StateData) ->
+    ok = (StateData#state.sockmod):controlling_process(
+	   StateData#state.socket,
+	   StateData#state.receiver),
+    ejabberd_receiver:become_controller(StateData#state.receiver),
+    {next_state, StateName, StateData};
 handle_event(_Event, StateName, StateData) ->
    {next_state, StateName, StateData}.

@ -975,7 +985,10 @@ handle_info({route, From, To, Packet}, StateName, StateData) ->
 	    {next_state, StateName, NewState};
 	true ->
 	    {next_state, StateName, NewState}
-    end.
+    end;
+handle_info(Info, StateName, StateData) ->
+    ?ERROR_MSG("Unexpected info: ~p", [Info]),
+    {next_state, StateName, StateData}.

 %%----------------------------------------------------------------------
 %% Func: terminate/3
@ -1035,7 +1048,7 @@ terminate(_Reason, StateName, StateData) ->
 	_ ->
 	    ok
    end,
-    (StateData#state.sockmod):close(StateData#state.socket),
+    ejabberd_receiver:close(StateData#state.receiver),
    ok.

 %%%----------------------------------------------------------------------
--- a/src/ejabberd_listener.erl
+++ b/src/ejabberd_listener.erl
@ -99,6 +99,7 @@ accept(ListenSocket, Module, Opts) ->
 		{error, _Reason} ->
 		    gen_tcp:close(Socket)
 	    end,
+	    Module:become_controller(Pid),
 	    accept(ListenSocket, Module, Opts);
 	{error, Reason} ->
 	    ?INFO_MSG("(~w) Failed TCP accept: ~w",
@ -146,6 +147,7 @@ accept_ssl(ListenSocket, Module, Opts) ->
 	    end,
 	    {ok, Pid} = Module:start({ssl, Socket}, Opts),
 	    catch ssl:controlling_process(Socket, Pid),
+	    Module:become_controller(Pid),
 	    accept_ssl(ListenSocket, Module, Opts);
 	{error, timeout} ->
 	    accept_ssl(ListenSocket, Module, Opts);
--- a/src/ejabberd_receiver.erl
+++ b/src/ejabberd_receiver.erl
@ -10,20 +10,68 @@
 -author('alexey@sevcom.net').
 -vsn('$Revision$ ').

+-behaviour(gen_server).
+
+%% API
 -export([start/3,
-	 receiver/4,
 	 change_shaper/2,
 	 reset_stream/1,
-	 starttls/2]).
+	 starttls/2,
+	 become_controller/1,
+	 close/1]).
+
+%% gen_server callbacks
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
+	 terminate/2, code_change/3]).

 -include("ejabberd.hrl").

+-record(state, {socket,
+		sock_mod,
+		shaper_state,
+		c2s_pid,
+		xml_stream_state,
+		timeout}).

+%%====================================================================
+%% API
+%%====================================================================
+%%--------------------------------------------------------------------
+%% Function: start() -> {ok,Pid} | ignore | {error,Error}
+%% Description: Starts the server
+%%--------------------------------------------------------------------
 start(Socket, SockMod, Shaper) ->
-    proc_lib:spawn(?MODULE, receiver, [Socket, SockMod, Shaper, self()]).
+    {ok, Pid} = gen_server:start(
+		  ?MODULE, [Socket, SockMod, Shaper, self()], []),
+    Pid.

+change_shaper(Pid, Shaper) ->
+    gen_server:cast(Pid, {change_shaper, Shaper}).

-receiver(Socket, SockMod, Shaper, C2SPid) ->
+reset_stream(Pid) ->
+    gen_server:call(Pid, reset_stream).
+
+starttls(Pid, TLSSocket) ->
+    gen_server:call(Pid, {starttls, TLSSocket}).
+
+become_controller(Pid) ->
+    gen_server:call(Pid, become_controller).
+
+close(Pid) ->
+    gen_server:cast(Pid, close).
+
+%%====================================================================
+%% gen_server callbacks
+%%====================================================================
+
+%%--------------------------------------------------------------------
+%% Function: init(Args) -> {ok, State} |
+%%                         {ok, State, Timeout} |
+%%                         ignore               |
+%%                         {stop, Reason}
+%% Description: Initiates the server
+%%--------------------------------------------------------------------
+init([Socket, SockMod, Shaper, C2SPid]) ->
    XMLStreamState = xml_stream:new(C2SPid),
    ShaperState = shaper:new(Shaper),
    Timeout = case SockMod of
@ -32,77 +80,149 @@ receiver(Socket, SockMod, Shaper, C2SPid) ->
 		  _ ->
 		      infinity
 	      end,
-    receiver(Socket, SockMod, ShaperState, C2SPid, XMLStreamState, Timeout).
+    {ok, #state{socket = Socket,
+		sock_mod = SockMod,
+		shaper_state = ShaperState,
+		c2s_pid = C2SPid,
+		xml_stream_state = XMLStreamState,
+		timeout = Timeout}}.

-receiver(Socket, SockMod, ShaperState, C2SPid, XMLStreamState, Timeout) ->
-    Res = (catch SockMod:recv(Socket, 0, Timeout)),
-    receive
-	{starttls, TLSSocket} ->
-	    xml_stream:close(XMLStreamState),
-	    XMLStreamState1 = xml_stream:new(C2SPid),
-	    TLSRes = case Res of
-			 {ok, Data} ->
-			     tls:recv_data(TLSSocket, Data);
-			 _ ->
-			     tls:recv_data(TLSSocket, "")
-		     end,
-	    receiver1(TLSSocket, tls,
-		      ShaperState, C2SPid, XMLStreamState1, Timeout,
-		      TLSRes);
-	{change_timeout, NewTimeout} -> % Dirty hack
-	    receiver1(Socket, SockMod,
-		      ShaperState, C2SPid, XMLStreamState, NewTimeout,
-		      Res)
-    after 0 ->
-	    receiver1(Socket, SockMod,
-		      ShaperState, C2SPid, XMLStreamState, Timeout,
-		      Res)
+%%--------------------------------------------------------------------
+%% Function: %% handle_call(Request, From, State) -> {reply, Reply, State} |
+%%                                      {reply, Reply, State, Timeout} |
+%%                                      {noreply, State} |
+%%                                      {noreply, State, Timeout} |
+%%                                      {stop, Reason, Reply, State} |
+%%                                      {stop, Reason, State}
+%% Description: Handling call messages
+%%--------------------------------------------------------------------
+handle_call({starttls, TLSSocket}, _From,
+	    #state{xml_stream_state = XMLStreamState,
+		   c2s_pid = C2SPid} = State) ->
+    xml_stream:close(XMLStreamState),
+    NewXMLStreamState = xml_stream:new(C2SPid),
+    NewState = State#state{socket = TLSSocket,
+			   sock_mod = tls,
+			   xml_stream_state = NewXMLStreamState},
+    case tls:recv_data(TLSSocket, "") of
+	{ok, TLSData} ->
+	    {reply, ok, process_data(TLSData, NewState)};
+	{error, _Reason} ->
+	    {stop, normal, ok, NewState}
+    end;
+handle_call(reset_stream, _From,
+	    #state{xml_stream_state = XMLStreamState,
+		   c2s_pid = C2SPid} = State) ->
+    xml_stream:close(XMLStreamState),
+    NewXMLStreamState = xml_stream:new(C2SPid),
+    Reply = ok,
+    {reply, Reply, State#state{xml_stream_state = NewXMLStreamState}};
+handle_call(become_controller, _From, State) ->
+    activate_socket(State),
+    Reply = ok,
+    {reply, Reply, State};
+handle_call(_Request, _From, State) ->
+    Reply = ok,
+    {reply, Reply, State}.
+
+%%--------------------------------------------------------------------
+%% Function: handle_cast(Msg, State) -> {noreply, State} |
+%%                                      {noreply, State, Timeout} |
+%%                                      {stop, Reason, State}
+%% Description: Handling cast messages
+%%--------------------------------------------------------------------
+handle_cast({change_shaper, Shaper}, State) ->
+    NewShaperState = shaper:new(Shaper),
+    {noreply, State#state{shaper_state = NewShaperState}};
+handle_cast(close, State) ->
+    {stop, normal, State};
+handle_cast(_Msg, State) ->
+    {noreply, State}.
+
+%%--------------------------------------------------------------------
+%% Function: handle_info(Info, State) -> {noreply, State} |
+%%                                       {noreply, State, Timeout} |
+%%                                       {stop, Reason, State}
+%% Description: Handling all non call/cast messages
+%%--------------------------------------------------------------------
+handle_info({Tag, _TCPSocket, Data},
+	    #state{socket = Socket,
+		   sock_mod = SockMod} = State)
+  when (Tag == tcp) or (Tag == ssl) ->
+    case SockMod of
+	tls ->
+	    case tls:recv_data(Socket, Data) of
+		{ok, TLSData} ->
+		    {noreply, process_data(TLSData, State)};
+		{error, _Reason} ->
+		    {stop, normal, State}
+	    end;
+	_ ->
+	    {noreply, process_data(Data, State)}
+    end;
+handle_info({Tag, _TCPSocket}, State)
+  when (Tag == tcp_closed) or (Tag == ssl_closed) ->
+    {stop, normal, State};
+handle_info({Tag, _TCPSocket, Reason}, State)
+  when (Tag == tcp_error) or (Tag == ssl_error) ->
+    case Reason of
+	timeout ->
+	    {noreply, State};
+	_ ->
+	    {stop, normal, State}
+    end;
+handle_info({timeout, _Ref, activate}, State) ->
+    activate_socket(State),
+    {noreply, State};
+handle_info(_Info, State) ->
+    {noreply, State}.
+
+%%--------------------------------------------------------------------
+%% Function: terminate(Reason, State) -> void()
+%% Description: This function is called by a gen_server when it is about to
+%% terminate. It should be the opposite of Module:init/1 and do any necessary
+%% cleaning up. When it returns, the gen_server terminates with Reason.
+%% The return value is ignored.
+%%--------------------------------------------------------------------
+terminate(_Reason, #state{xml_stream_state = XMLStreamState,
+			  c2s_pid = C2SPid} = State) ->
+    xml_stream:close(XMLStreamState),
+    gen_fsm:send_event(C2SPid, closed),
+    catch (State#state.sock_mod):close(State#state.socket),
+    ok.
+
+%%--------------------------------------------------------------------
+%% Func: code_change(OldVsn, State, Extra) -> {ok, NewState}
+%% Description: Convert process state when code is changed
+%%--------------------------------------------------------------------
+code_change(_OldVsn, State, _Extra) ->
+    {ok, State}.
+
+%%--------------------------------------------------------------------
+%%% Internal functions
+%%--------------------------------------------------------------------
+
+activate_socket(#state{socket = Socket,
+		       sock_mod = SockMod}) ->
+    case SockMod of
+	gen_tcp ->
+	    inet:setopts(Socket, [{active, once}]);
+	_ ->
+	    SockMod:setopts(Socket, [{active, once}])
    end.


-receiver1(Socket, SockMod, ShaperState, C2SPid, XMLStreamState, Timeout, Res) ->
-    case Res of
-        {ok, Text} ->
-	    ShaperSt1 = receive
-			    {change_shaper, Shaper} ->
-				shaper:new(Shaper)
-			after 0 ->
-				ShaperState
-			end,
-	    NewShaperState = shaper:update(ShaperSt1, size(Text)),
-	    XMLStreamState1 = receive
-				  reset_stream ->
-				      xml_stream:close(XMLStreamState),
-				      xml_stream:new(C2SPid)
-			      after 0 ->
-				      XMLStreamState
-			      end,
-	    XMLStreamState2 = xml_stream:parse(XMLStreamState1, Text),
-	    receiver(Socket, SockMod, NewShaperState, C2SPid, XMLStreamState2,
-		     Timeout);
-	{error, timeout} ->
-	    receiver(Socket, SockMod, ShaperState, C2SPid, XMLStreamState,
-		     Timeout);
-        {error, Reason} ->
-	    xml_stream:close(XMLStreamState),
-	    gen_fsm:send_event(C2SPid, closed),
-	    ok;
-	{'EXIT', Reason} ->
-	    ?ERROR_MSG("(~w) abnormal ~w:recv termination:~n\t~p~n",
-		       [Socket, SockMod, Reason]),
-	    xml_stream:close(XMLStreamState),
-	    gen_fsm:send_event(C2SPid, closed),
-	    ok
-    end.
-
-
-change_shaper(Pid, Shaper) ->
-    Pid ! {change_shaper, Shaper}.
-
-reset_stream(Pid) ->
-    Pid ! reset_stream.
-
-starttls(Pid, TLSSocket) ->
-    Pid ! {starttls, TLSSocket}.
-
+process_data(Data,
+	     #state{xml_stream_state = XMLStreamState,
+		    shaper_state = ShaperState} = State) ->
+    XMLStreamState1 = xml_stream:parse(XMLStreamState, Data),
+    {NewShaperState, Pause} = shaper:update(ShaperState, size(Data)),
+    if
+	Pause > 0 ->
+	    erlang:start_timer(Pause, self(), activate);
+	true ->
+	    activate_socket(State)
+    end,
+    State#state{xml_stream_state = XMLStreamState1,
+		shaper_state = NewShaperState}.

--- a/src/ejabberd_s2s_in.erl
+++ b/src/ejabberd_s2s_in.erl
@ -1,7 +1,7 @@
 %%%----------------------------------------------------------------------
 %%% File    : ejabberd_s2s_in.erl
 %%% Author  : Alexey Shchepin <alexey@sevcom.net>
-%%% Purpose : 
+%%% Purpose : Serve incoming s2s connection
 %%% Created :  6 Dec 2002 by Alexey Shchepin <alexey@sevcom.net>
 %%% Id      : $Id$
 %%%----------------------------------------------------------------------
@ -14,7 +14,9 @@

 %% External exports
 -export([start/2,
-	 start_link/2,match_domain/2]).
+	 start_link/2,
+	 become_controller/1,
+	 match_domain/2]).

 %% gen_fsm callbacks
 -export([init/1,
@ -29,7 +31,6 @@

 -include("ejabberd.hrl").
 -include("jlib.hrl").
-%-include_lib("ssl/pkix/SSL-PKIX.hrl").
 -include_lib("ssl/pkix/PKIX1Explicit88.hrl").
 -include_lib("ssl/pkix/PKIX1Implicit88.hrl").
 -include("XmppAddr.hrl").
@ -87,6 +88,9 @@ start(SockData, Opts) ->
 start_link(SockData, Opts) ->
    gen_fsm:start_link(ejabberd_s2s_in, [SockData, Opts], ?FSMOPTS).

+become_controller(Pid) ->
+    gen_fsm:send_all_state_event(Pid, become_controller).
+
 %%%----------------------------------------------------------------------
 %%% Callback functions from gen_fsm
 %%%----------------------------------------------------------------------
@ -455,6 +459,12 @@ stream_established(closed, StateData) ->
 %%          {next_state, NextStateName, NextStateData, Timeout} |
 %%          {stop, Reason, NewStateData}                         
 %%----------------------------------------------------------------------
+handle_event(become_controller, StateName, StateData) ->
+    ok = (StateData#state.sockmod):controlling_process(
+	   StateData#state.socket,
+	   StateData#state.receiver),
+    ejabberd_receiver:become_controller(StateData#state.receiver),
+    {next_state, StateName, StateData};
 handle_event(_Event, StateName, StateData) ->
    {next_state, StateName, StateData}.

@ -499,7 +509,7 @@ handle_info(_, StateName, StateData) ->
 %%----------------------------------------------------------------------
 terminate(Reason, _StateName, StateData) ->
    ?INFO_MSG("terminated: ~p", [Reason]),
-    (StateData#state.sockmod):close(StateData#state.socket),
+    ejabberd_receiver:close(StateData#state.receiver),
    ok.

 %%%----------------------------------------------------------------------
--- a/src/ejabberd_s2s_out.erl
+++ b/src/ejabberd_s2s_out.erl
@ -164,6 +164,8 @@ open_socket(init, StateData) ->
    case Res of
 	{ok, Socket} ->
 	    ReceiverPid = ejabberd_receiver:start(Socket, gen_tcp, none),
+	    ok = gen_tcp:controlling_process(Socket, ReceiverPid),
+	    ejabberd_receiver:become_controller(ReceiverPid),
 	    Version = if
 			  StateData#state.use_v10 ->
 			      " version='1.0'";
@ -342,7 +344,6 @@ wait_for_features({xmlstreamelement, El}, StateData) ->
 		     StateData#state{try_auth = false}};
 		StartTLS and StateData#state.tls and
 		(not StateData#state.tls_enabled) ->
-		    StateData#state.receiver ! {change_timeout, 100},
 		    send_element(StateData,
 				 {xmlelement, "starttls",
 				  [{"xmlns", ?NS_TLS}], []}),
@ -462,7 +463,6 @@ wait_for_starttls_proceed({xmlstreamelement, El}, StateData) ->
 		    {ok, TLSSocket} = tls:tcp_to_tls(Socket, TLSOpts),
 		    ejabberd_receiver:starttls(
 		      StateData#state.receiver, TLSSocket),
-		    StateData#state.receiver ! {change_timeout, infinity},
 		    NewStateData = StateData#state{sockmod = tls,
 						   socket = TLSSocket,
 						   streamid = new_id(),
@ -630,8 +630,7 @@ handle_info(_, StateName, StateData) ->
 %%----------------------------------------------------------------------
 terminate(Reason, StateName, StateData) ->
    ?INFO_MSG("terminated: ~p", [Reason]),
-    Error = ?ERR_REMOTE_SERVER_NOT_FOUND,
-    bounce_queue(StateData#state.queue, Error),
+    bounce_queue(StateData#state.queue, ?ERR_REMOTE_SERVER_NOT_FOUND),
    case StateData#state.new of
 	false ->
 	    ok;
@ -642,8 +641,8 @@ terminate(Reason, StateName, StateData) ->
    case StateData#state.socket of
 	undefined ->
 	    ok;
-	Socket ->
-	    (StateData#state.sockmod):close(Socket)
+	_Socket ->
+	    ejabberd_receiver:close(StateData#state.receiver)
    end,
    ok.

--- a/src/ejabberd_service.erl
+++ b/src/ejabberd_service.erl
@ -13,7 +13,12 @@
 -behaviour(gen_fsm).

 %% External exports
-export([start/2, start_link/2, receiver/3, send_text/2, send_element/2]).
+-export([start/2,
+	 start_link/2,
+	 receiver/3,
+	 send_text/2,
+	 send_element/2,
+	 become_controller/1]).

 %% gen_fsm callbacks
 -export([init/1,
@ -75,6 +80,9 @@ start(SockData, Opts) ->
 start_link(SockData, Opts) ->
    gen_fsm:start_link(ejabberd_service, [SockData, Opts], ?FSMOPTS).

+become_controller(_Pid) ->
+    ok.
+
 %%%----------------------------------------------------------------------
 %%% Callback functions from gen_fsm
 %%%----------------------------------------------------------------------
@ -175,7 +183,7 @@ wait_for_handshake({xmlstreamelement, El}, StateData) ->
 		    {stop, normal, StateData}
 	    end;
 	_ ->
-	    {next_state, wait_for_key, StateData}
+	    {next_state, wait_for_handshake, StateData}
    end;

 wait_for_handshake({xmlstreamend, _Name}, StateData) ->
--- a/src/shaper.erl
+++ b/src/shaper.erl
@ -33,25 +33,26 @@ new1({maxrate, MaxRate}) ->
 	     lasttime = now_to_usec(now())}.


-update(none, Size) ->
-    none;
+update(none, _Size) ->
+    {none, 0};
 update(#maxrate{} = State, Size) ->
    MinInterv = 1000 * Size /
 	(2 * State#maxrate.maxrate - State#maxrate.lastrate),
    Interv = (now_to_usec(now()) - State#maxrate.lasttime) / 1000,
    %io:format("State: ~p, Size=~p~nM=~p, I=~p~n",
    %          [State, Size, MinInterv, Interv]),
-    if
-	MinInterv > Interv ->
-	    timer:sleep(1 + trunc(MinInterv - Interv));
-	true ->
-	    ok
-    end,
-    Now = now_to_usec(now()),
-    State#maxrate{
-      lastrate = (State#maxrate.lastrate +
-		  1000000 * Size / (Now - State#maxrate.lasttime))/2,
-      lasttime = Now}.
+    Pause = if
+		MinInterv > Interv ->
+		    1 + trunc(MinInterv - Interv);
+		true ->
+		    0
+	    end,
+    NextNow = now_to_usec(now()) + Pause * 1000,
+    {State#maxrate{
+       lastrate = (State#maxrate.lastrate +
+		   1000000 * Size / (NextNow - State#maxrate.lasttime))/2,
+       lasttime = NextNow},
+     Pause}.


 now_to_usec({MSec, Sec, USec}) ->
--- a/src/tls/tls.erl
+++ b/src/tls/tls.erl
@ -16,6 +16,8 @@
 	 tcp_to_tls/2, tls_to_tcp/1,
 	 send/2,
 	 recv/2, recv/3, recv_data/2,
+	 setopts/2,
+	 controlling_process/2,
 	 close/1,
 	 get_peer_certificate/1,
 	 get_verify_result/1,
@ -175,6 +177,12 @@ send(#tlssock{tcpsock = TCPSocket, tlsport = Port}, Packet) ->
    end.


+setopts(#tlssock{tcpsock = TCPSocket}, Opts) ->
+    inet:setopts(TCPSocket, Opts).
+
+controlling_process(#tlssock{tcpsock = TCPSocket}, Pid) ->
+    gen_tcp:controlling_process(TCPSocket, Pid).
+
 close(#tlssock{tcpsock = TCPSocket, tlsport = Port}) ->
    gen_tcp:close(TCPSocket),
    port_close(Port).
--- a/src/web/ejabberd_http.erl
+++ b/src/web/ejabberd_http.erl
@ -13,6 +13,7 @@
 %% External exports
 -export([start/2,
 	 start_link/2,
+	 become_controller/1,
 	 receive_headers/1,
 	 url_encode/1]).

@ -81,6 +82,9 @@ start_link({SockMod, Socket}, Opts) ->
 				     use_web_admin = UseWebAdmin}])}.


+become_controller(_Pid) ->
+    ok.
+
 send_text(State, Text) ->
    (State#state.sockmod):send(State#state.socket, Text).