aboutsummaryrefslogblamecommitdiffstats
path: root/lib/ssl/test/ssl_payload_SUITE.erl
blob: 77ad546420a03523588a95ce9618007f876e2275 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
                   
  
                                                        
  



                                                                      
  


                                                                         
  






                                                           
                                           

                         
                                                                      
                                                                      
                                                                      
                                         
 
         














                                      
                                    
                                
                                    








                                   
                               
                                   
 













                                                                                 
 
                                    
                                                   
               





                                                                     
            

                        
                                    
           
 


                                                   
 


                                                                      
                                                                      
 

                                                                                    











                                                                        

                                                                                  











                                                                        

                                                                                   










                                                                        

                                                                                    










                                                                        
                                   
                                                                            
                                           










                                                                            

                                                                                   
                                                          
                                              








                                                                        

                                                                                     











                                                                         

                                                                                  
                                                             
                                              








                                                                             

                                                                                   










                                                                        

                                                                                     










                                                                         

                                                                                  










                                                                             

                                                                                    










                                                                        

                                                                                










                                                                          

                                                                                    










                                                                              

                                                                                     










                                                                         

                                                                                









                                                                          

                                                                                    









                                                                              

                                                                                     









                                                                        
                                                                      








































































































































































                                                                                              
                                                                   



                                                                       
                                        




                                                                
                                                                     

                             
                                                                   

                                                                    
                                         


                                                                           
                                                                     



















































































                                                                           
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2008-2013. All Rights Reserved.
%%
%% The contents of this file are subject to the Erlang Public License,
%% Version 1.1, (the "License"); you may not use this file except in
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved online at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% %CopyrightEnd%
%%

-module(ssl_payload_SUITE).

%% Note: This directive should only be used in test suites.
-compile(export_all).

-include_lib("common_test/include/ct.hrl").

-define(TIMEOUT, 600000).

%%--------------------------------------------------------------------
%% Common Test interface functions -----------------------------------
%%--------------------------------------------------------------------
suite() -> [{ct_hooks,[ts_install_cth]}].

all() -> 
    [
     {group, 'tlsv1.2'},
     {group, 'tlsv1.1'},
     {group, 'tlsv1'},
     {group, 'sslv3'}
    ].

groups() ->
    [
     {'tlsv1.2', [], payload_tests()},
     {'tlsv1.1', [], payload_tests()},
     {'tlsv1', [], payload_tests()},
     {'sslv3', [], payload_tests()}
    ].

payload_tests() ->
    [server_echos_passive_small,
     server_echos_active_once_small,
     server_echos_active_small,
     client_echos_passive_small,
     client_echos_active_once_small,
     client_echos_active_small,
     server_echos_passive_big,
     server_echos_active_once_big,
     server_echos_active_big,
     client_echos_passive_big,
     client_echos_active_once_big,
     client_echos_active_big,
     server_echos_passive_huge,
     server_echos_active_once_huge,
     server_echos_active_huge,
     client_echos_passive_huge,
     client_echos_active_once_huge,
     client_echos_active_huge].

init_per_suite(Config) ->
    catch crypto:stop(),
    try crypto:start() of
	ok ->
	    application:start(public_key),
	    ssl:start(),
	    make_certs:all(?config(data_dir, Config), ?config(priv_dir, Config)),
	    ssl_test_lib:cert_options(Config)
    catch _:_  ->
	    {skip, "Crypto did not start"}
    end.

end_per_suite(_Config) ->
    ssl:stop(),
    application:stop(crypto).

init_per_group(GroupName, Config) ->
     case ssl_test_lib:is_tls_version(GroupName) of
	true ->
	    case ssl_test_lib:sufficient_crypto_support(GroupName) of
		true ->
		    ssl_test_lib:init_tls_version(GroupName),
		    Config;
		false ->
		    {skip, "Missing crypto support"}
	    end;
	_ ->
	    ssl:start(),
	    Config
    end.

end_per_group(_GroupName, Config) ->
    Config.

init_per_testcase(_TestCase, Config0) ->
    Config = lists:keydelete(watchdog, 1, Config0),
    Dog = ct:timetrap(?TIMEOUT),
    [{watchdog, Dog} | Config].

end_per_testcase(_TestCase, Config) ->
    Config.
%%--------------------------------------------------------------------
%% Test Cases --------------------------------------------------------
%%--------------------------------------------------------------------

server_echos_passive_small() ->
    [{doc, "Client sends 1000 bytes in passive mode to server, that receives them, "
     "sends them back, and closes."}].

server_echos_passive_small(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_passive(Str, 1000, ClientOpts, ServerOpts, 
			 ClientNode, ServerNode, Hostname).

%%--------------------------------------------------------------------

server_echos_active_once_small() ->
    [{doc, "Client sends 1000 bytes in active once mode to server, that receives "
     " them, sends them back, and closes."}].

server_echos_active_once_small(Config) when is_list(Config) -> 
        ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active_once(Str, 1000, ClientOpts, ServerOpts, 
			     ClientNode, ServerNode, Hostname).

%%--------------------------------------------------------------------

server_echos_active_small() ->
    [{doc, "Client sends 1000 bytes in active mode to server, that receives them, "
     "sends them back, and closes."}].

server_echos_active_small(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active(Str, 1000, ClientOpts, ServerOpts, 
			ClientNode, ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_passive_small() ->
    [{doc, "Server sends 1000 bytes in passive mode to client, that receives them, "
      "sends them back, and closes."}].

client_echos_passive_small(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 

    client_echos_passive(Str, 1000, ClientOpts, ServerOpts, ClientNode, 
			 ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_active_once_small() ->
    ["Server sends 1000 bytes in active once mode to client, that receives "
     "them, sends them back, and closes."].

client_echos_active_once_small(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    client_echos_active_once(Str, 1000, ClientOpts, ServerOpts, ClientNode, 
			     ServerNode, Hostname).
   
%%--------------------------------------------------------------------
client_echos_active_small() ->
    [{doc, "Server sends 1000 bytes in active mode to client, that receives them, "
      "sends them back, and closes."}].

client_echos_active_small(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890",     

    client_echos_active(Str, 1000, ClientOpts, ServerOpts, ClientNode, 
			ServerNode, Hostname).


%%--------------------------------------------------------------------
server_echos_passive_big() ->
    [{doc, "Client sends 50000 bytes to server in passive mode, that receives them, "
     "sends them back, and closes."}].

server_echos_passive_big(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_passive(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			 ServerNode, Hostname).

%%--------------------------------------------------------------------

server_echos_active_once_big() ->
    [{doc,"Client sends 50000 bytes to server in active once mode, that receives "
      "them, sends them back, and closes."}].

server_echos_active_once_big(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active_once(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			     ServerNode, Hostname).

%%--------------------------------------------------------------------

server_echos_active_big() ->
    [{doc, "Client sends 50000 bytes to server in active once mode, that receives "
      " them, sends them back, and closes."}].

server_echos_active_big(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_passive_big() ->
    [{doc, "Server sends 50000 bytes to client in passive mode, that receives them, "
     "sends them back, and closes."}].

client_echos_passive_big(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 

    client_echos_passive(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			 ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_active_once_big() ->
    [{doc, "Server sends 50000 bytes to client in active once mode, that receives"
      " them, sends them back, and closes."}].

client_echos_active_once_big(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 

    client_echos_active_once(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			     ServerNode, Hostname).
   
%%--------------------------------------------------------------------
client_echos_active_big() ->
    [{doc, "Server sends 50000 bytes to client in active mode, that receives them, "
      "sends them back, and closes."}].

client_echos_active_big(Config) when is_list(Config) -> 
     ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    client_echos_active(Str, 50000, ClientOpts, ServerOpts, ClientNode, 
			ServerNode, Hostname).

%%--------------------------------------------------------------------
server_echos_passive_huge() ->
    [{doc, "Client sends 500000 bytes to server in passive mode, that receives "
      " them, sends them back, and closes."}].

server_echos_passive_huge(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_passive(Str, 500000, ClientOpts, ServerOpts, ClientNode, 
			 ServerNode, Hostname).

%%--------------------------------------------------------------------
server_echos_active_once_huge() ->
    [{doc, "Client sends 500000 bytes to server in active once mode, that receives "
      "them, sends them back, and closes."}].

server_echos_active_once_huge(Config) when is_list(Config) -> 
        ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active_once(Str, 500000, ClientOpts, ServerOpts, ClientNode, 
			     ServerNode, Hostname).

%%--------------------------------------------------------------------
server_echos_active_huge() ->
    [{doc, "Client sends 500000 bytes to server in active mode, that receives them, "
     "sends them back, and closes."}].

server_echos_active_huge(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    
    server_echos_active(Str, 500000, ClientOpts, ServerOpts, ClientNode, 
			ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_passive_huge() ->
    [{doc, "Server sends 500000 bytes to client in passive mode, that receives "
     "them, sends them back, and closes."}].

client_echos_passive_huge(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    client_echos_passive(Str, 500000, ClientOpts, ServerOpts, ClientNode, 
			 ServerNode, Hostname).

%%--------------------------------------------------------------------
client_echos_active_once_huge() ->
    [{doc, "Server sends 500000 bytes to client in active once mode, that receives "
      "them, sends them back, and closes."}].

client_echos_active_once_huge(Config) when is_list(Config) -> 
    ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    client_echos_active_once(Str, 500000, ClientOpts, ServerOpts, ClientNode, 
			     ServerNode, Hostname).
   
%%--------------------------------------------------------------------
client_echos_active_huge() ->
    [{doc, "Server sends 500000 bytes to client in active mode, that receives them, "
     "sends them back, and closes."}].

client_echos_active_huge(Config) when is_list(Config) -> 
     ClientOpts = ?config(client_opts, Config),
    ServerOpts = ?config(server_opts, Config),
    {ClientNode, ServerNode, Hostname} = ssl_test_lib:run_where(Config),

    Str = "1234567890", 
    client_echos_active(Str, 500000, ClientOpts, ServerOpts, ClientNode,
			ServerNode, Hostname).
 
%%--------------------------------------------------------------------
%% Internal functions ------------------------------------------------
%%--------------------------------------------------------------------

server_echos_passive(Data, Length, ClientOpts, ServerOpts, 
		     ClientNode, ServerNode, Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer, 
					  [Data, Length]}},
					{options, 
					 [{active, false},{mode, binary} 
					  | ServerOpts]}]),
				       Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender, 
					       [Data, 
						Length]}},
					{options, 
					 [{active, false}, {mode, binary} |
					  ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).


server_echos_active_once(Data, Length, ClientOpts, ServerOpts, ClientNode,
			 ServerNode, Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer_once, 
					  [Data, Length]}},
					{options, [{active, once},
						   {mode, binary}| 
						   ServerOpts]}]),
    Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender_once, 
					  [Data, Length]}},
					{options, [{active, once}, 
						   {mode, binary} | 
						   ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).


server_echos_active(Data, Length, ClientOpts, ServerOpts, 
		    ClientNode, ServerNode, Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer_active, 
					  [Data, Length]}},
					{options,  
					 [{active, true},
					  {mode, binary} | ServerOpts]}]),
    Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender_active, 
					       [Data, 
						Length]}},
					{options,  
					 [{active, true}, {mode, binary}
					  | ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).

client_echos_passive(Data, Length, ClientOpts, ServerOpts, 
		     ClientNode, ServerNode, Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender, 
					  [Data, Length]}},
					{options, 
					 [{active, false}, {mode, binary} | 
					  ServerOpts]}]),
    Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer, 
					       [Data, 
						Length]}},
					{options, 
					 [{active, false}, {mode, binary}
					  | ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).

client_echos_active_once(Data, Length, 
			 ClientOpts, ServerOpts, ClientNode, ServerNode,
			 Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender_once, 
					  [Data, Length]}},
					{options, [{active, once},
						   {mode, binary} | 
						   ServerOpts]}]),
    Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer_once, 
					  [Data, 
					   Length]}},
					{options,[{active, once},
						  {mode, binary}
						  | ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).

client_echos_active(Data, Length, ClientOpts, ServerOpts, ClientNode, 
		    ServerNode,
			 Hostname) ->
    Server = ssl_test_lib:start_server([{node, ServerNode}, {port, 0}, 
					{from, self()}, 
					{mfa, 
					 {?MODULE, sender_active, 
					  [Data, Length]}},
					{options, [{active, true}, 
						   {mode, binary}
						   | ServerOpts]}]),
    Port = ssl_test_lib:inet_port(Server),
    Client = ssl_test_lib:start_client([{node, ClientNode}, {port, Port}, 
					{host, Hostname},
					{from, self()}, 
					{mfa, 
					 {?MODULE, echoer_active, 
					       [Data, 
						Length]}},
					{options, [{active, true},
						   {mode, binary}
						   | ClientOpts]}]),
    ssl_test_lib:check_result(Server, ok, Client, ok),
    
    ssl_test_lib:close(Server),
    ssl_test_lib:close(Client).

send(_, _, _, 0,_) ->
    ok;
send(Socket, Data, Size, Repeate,F) ->
    NewData = lists:duplicate(Size div 10, Data),
    ssl:send(Socket, NewData),
    F(),
    send(Socket, Data, Size, Repeate - 1,F).
 
sender(Socket, Data, Size) ->
    ok = send(Socket, Data, Size, 100, fun() -> do_recv(Socket, Data, Size, <<>>, false) end),
    ct:print("Sender recv: ~p~n", [ssl:getopts(Socket, [active])]),
    ok.

sender_once(Socket, Data, Size) ->
    send(Socket, Data, Size, 100, 
	 fun() -> do_active_once(Socket, Data, Size, <<>>, false) end),
    ct:print("Sender active once: ~p~n",
		       [ssl:getopts(Socket, [active])]),
    ok.

sender_active(Socket, Data, Size) ->
    F = fun() -> do_active(Socket, Data, Size, <<>>, false) end,
    send(Socket, Data, Size, 100, F),
    ct:print("Sender active: ~p~n", [ssl:getopts(Socket, [active])]),
    ok.

echoer(Socket, Data, Size) ->
    ct:print("Echoer recv: ~p~n", [ssl:getopts(Socket, [active])]),
    echo(fun() -> do_recv(Socket, Data, Size, <<>>, true) end, 100).

echoer_once(Socket, Data, Size) ->
    ct:print("Echoer active once: ~p ~n",
		       [ssl:getopts(Socket, [active])]),
    echo(fun() -> do_active_once(Socket, Data, Size, <<>>, true) end, 100).

echoer_active(Socket, Data, Size) ->
    ct:print("Echoer active: ~p~n", [ssl:getopts(Socket, [active])]),
    echo(fun() -> do_active(Socket, Data, Size, <<>>, true) end, 100).

echo(_Fun, 0) -> ok;
echo(Fun, N) ->
    Fun(),
    echo(Fun, N-1).


do_recv(_Socket, _Data, 0, _Acc, true) ->
    ok;
do_recv(_Socket, Data, 0, Acc, false) ->
    Data = lists:sublist(binary_to_list(Acc), 10);

do_recv(Socket, Data, Size, Acc, Echo) ->
    {ok, NewData} = ssl:recv(Socket, 0),
    NewSize = size(NewData), 
    case Echo of
	true ->
	    ssl:send(Socket, NewData),
	    NewSize = size(NewData), 
	    do_recv(Socket, Data, Size - NewSize, [], Echo);
	false ->
	    case size(Acc) < 10 of
		true ->
		    do_recv(Socket, Data, Size - NewSize, 
			    <<Acc/binary, NewData/binary>>, Echo);
		false ->
		    do_recv(Socket, Data, Size - NewSize, Acc, Echo) 
	    end
    end.

do_active_once(_Socket, _Data, 0, _Acc, true) ->
    ok;
do_active_once(_Socket, Data, 0, Acc, false) ->
    Data = lists:sublist(binary_to_list(Acc), 10);

do_active_once(Socket, Data, Size, Acc, Echo) ->    
    receive 
	{ssl, Socket, NewData} ->
	    NewSize = size(NewData), 
	    case Echo of
		true ->
		    ssl:send(Socket, NewData),
		    ssl:setopts(Socket, [{active, once}]),
		    do_active_once(Socket, Data, Size - NewSize, [], Echo);
		false ->
		    case size(Acc) < 10 of
			true ->
			    ssl:setopts(Socket, [{active, once}]),
			    do_active_once(Socket, Data, Size - NewSize, 
					   <<Acc/binary, NewData/binary>>, 
					   Echo);
			false ->
			    ssl:setopts(Socket, [{active, once}]),
			    do_active_once(Socket, Data, 
					   Size - NewSize, Acc, Echo) 
		    end 
	    end
    end.
    
do_active(_Socket, _Data, 0, _Acc, true) ->
    ok;
do_active(_Socket, Data, 0, Acc, false) ->
    Data = lists:sublist(binary_to_list(Acc), 10);

do_active(Socket, Data, Size, Acc, Echo) ->    
    receive 
	{ssl, Socket, NewData} ->
	    NewSize = size(NewData), 
	    case Echo of
		true ->
		    ssl:send(Socket, NewData),
		    do_active(Socket, Data, Size - NewSize, [], Echo);
		false ->
		    case size(Acc) < 10 of
			true ->
			    do_active(Socket, Data, Size - NewSize, 
					   <<Acc/binary, NewData/binary>>, 
				      Echo);
			false ->
			    do_active(Socket, Data, 
				      Size - NewSize, Acc, Echo) 
		    end 
	    end
    end.