2 -- server.lua by blastbeat of the luadch project
3 -- Re-used here under the MIT/X Consortium License
5 -- Modifications (C) 2008-2010 Matthew Wild, Waqas Hussain
8 -- // wrapping luadch stuff // --
10 local use = function( what )
14 local log, table_concat = require ("util.logger").init("socket"), table.concat;
15 local out_put = function (...) return log("debug", table_concat{...}); end
16 local out_error = function (...) return log("warn", table_concat{...}); end
18 ----------------------------------// DECLARATION //--
22 local STAT_UNIT = 1 -- byte
24 --// lua functions //--
26 local type = use "type"
27 local pairs = use "pairs"
28 local ipairs = use "ipairs"
29 local tonumber = use "tonumber"
30 local tostring = use "tostring"
35 local table = use "table"
36 local string = use "string"
37 local coroutine = use "coroutine"
39 --// lua lib methods //--
41 local os_difftime = os.difftime
42 local math_min = math.min
43 local math_huge = math.huge
44 local table_concat = table.concat
45 local string_sub = string.sub
46 local coroutine_wrap = coroutine.wrap
47 local coroutine_yield = coroutine.yield
51 local luasec = use "ssl"
52 local luasocket = use "socket" or require "socket"
53 local luasocket_gettime = luasocket.gettime
55 --// extern lib methods //--
57 local ssl_wrap = ( luasec and luasec.wrap )
58 local socket_bind = luasocket.bind
59 local socket_sleep = luasocket.sleep
60 local socket_select = luasocket.select
93 --// simple data types //--
123 local _maxsslhandshake
125 ----------------------------------// DEFINITION //--
127 _server = { } -- key = port, value = table; list of listening servers
128 _readlist = { } -- array with sockets to read from
129 _sendlist = { } -- arrary with sockets to write to
130 _timerlist = { } -- array of timer functions
131 _socketlist = { } -- key = socket, value = wrapped socket (handlers)
132 _readtimes = { } -- key = handler, value = timestamp of last data reading
133 _writetimes = { } -- key = handler, value = timestamp of last data writing/sending
134 _closelist = { } -- handlers to close
135 _fullservers = { } -- servers in a paused state while there are too many clients
137 _readlistlen = 0 -- length of readlist
138 _sendlistlen = 0 -- length of sendlist
139 _timerlistlen = 0 -- lenght of timerlist
141 _sendtraffic = 0 -- some stats
144 _selecttimeout = 1 -- timeout of socket.select
145 _sleeptime = 0 -- time to wait at the end of every loop
146 _tcpbacklog = 128 -- some kind of hint to the OS
147 _accepretry = 10 -- seconds to wait until the next attempt of a full server to accept
149 _maxsendlen = 51000 * 1024 -- max len of send buffer
150 _maxreadlen = 25000 * 1024 -- max len of read buffer
152 _checkinterval = 1200000 -- interval in secs to check idle clients
153 _sendtimeout = 60000 -- allowed send idle time in secs
154 _readtimeout = 6 * 60 * 60 -- allowed read idle time in secs
156 local is_windows = package.config:sub(1,1) == "\\" -- check the directory separator, to detemine whether this is Windows
157 _maxfd = (is_windows and math.huge) or luasocket._SETSIZE or 1024 -- max fd number, limit to 1024 by default to prevent glibc buffer overflow, but not on Windows
158 _maxselectlen = luasocket._SETSIZE or 1024 -- But this still applies on Windows
160 _maxsslhandshake = 30 -- max handshake round-trips
162 ----------------------------------// PRIVATE //--
164 wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- this function wraps a server -- FIXME Make sure FD < _maxfd
166 if socket:getfd() >= _maxfd then
167 out_error("server.lua: Disallowed FD number: "..socket:getfd())
169 return nil, "fd-too-large"
172 local connections = 0
174 local dispatch, disconnect = listeners.onconnect, listeners.ondisconnect
176 local accept = socket.accept
178 --// public methods of the object //--
182 handler.shutdown = function( ) end
184 handler.ssl = function( )
187 handler.sslctx = function( )
190 handler.remove = function( )
191 connections = connections - 1
196 handler.close = function()
198 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
199 _readlistlen = removesocket( _readlist, socket, _readlistlen )
200 _server[ip..":"..serverport] = nil;
201 _socketlist[ socket ] = nil
205 out_put "server.lua: closed server handler and removed sockets from list"
207 handler.pause = function( hard )
208 if not handler.paused then
209 _readlistlen = removesocket( _readlist, socket, _readlistlen )
211 _socketlist[ socket ] = nil
215 handler.paused = true;
216 out_put("server.lua: server [", ip, "]:", serverport, " paused")
219 handler.resume = function( )
220 if handler.paused then
222 socket = socket_bind( ip, serverport, _tcpbacklog );
223 socket:settimeout( 0 )
225 _readlistlen = addsocket(_readlist, socket, _readlistlen)
226 _socketlist[ socket ] = handler
227 _fullservers[ handler ] = nil
228 handler.paused = false;
229 out_put("server.lua: server [", ip, "]:", serverport, " resumed")
232 handler.ip = function( )
235 handler.serverport = function( )
238 handler.socket = function( )
241 handler.readbuffer = function( )
242 if _readlistlen >= _maxselectlen or _sendlistlen >= _maxselectlen then
244 _fullservers[ handler ] = _currenttime
245 out_put( "server.lua: refused new client connection: server full" )
248 local client, err = accept( socket ) -- try to accept
250 local ip, clientport = client:getpeername( )
251 local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx ) -- wrap new client socket
252 if err then -- error while wrapping ssl socket
255 connections = connections + 1
256 out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))
257 if dispatch and not sslctx then -- SSL connections will notify onconnect when handshake completes
258 return dispatch( handler );
261 elseif err then -- maybe timeout or something else
262 out_put( "server.lua: error with new client connection: ", tostring(err) )
264 _fullservers[ handler ] = _currenttime
271 wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx ) -- this function wraps a client to a handler object
273 if socket:getfd() >= _maxfd then
274 out_error("server.lua: Disallowed FD number: "..socket:getfd()) -- PROTIP: Switch to libevent
275 socket:close( ) -- Should we send some kind of error here?
277 _fullservers[ server ] = _currenttime
280 return nil, nil, "fd-too-large"
282 socket:settimeout( 0 )
284 --// local import of socket methods //--
290 --// private closures of the object //--
294 local dispatch = listeners.onincoming
295 local status = listeners.onstatus
296 local disconnect = listeners.ondisconnect
297 local drain = listeners.ondrain
298 local detach = listeners.ondetach
300 local bufferqueue = { } -- buffer array
301 local bufferqueuelen = 0 -- end of buffer array
312 local sendtraffic, readtraffic = 0, 0
314 local maxsendlen = _maxsendlen
315 local maxreadlen = _maxreadlen
317 --// public methods of the object //--
319 local handler = bufferqueue -- saves a table ^_^
321 handler.dispatch = function( )
324 handler.disconnect = function( )
327 handler.setlistener = function( self, listeners )
329 detach(self) -- Notify listener that it is no longer responsible for this connection
331 dispatch = listeners.onincoming
332 disconnect = listeners.ondisconnect
333 status = listeners.onstatus
334 drain = listeners.ondrain
335 detach = listeners.ondetach
337 handler.getstats = function( )
338 return readtraffic, sendtraffic
340 handler.ssl = function( )
343 handler.sslctx = function ( )
346 handler.send = function( _, data, i, j )
347 return send( socket, data, i, j )
349 handler.receive = function( pattern, prefix )
350 return receive( socket, pattern, prefix )
352 handler.shutdown = function( pattern )
353 return shutdown( socket, pattern )
355 handler.setoption = function (self, option, value)
356 if socket.setoption then
357 return socket:setoption(option, value);
359 return false, "setoption not implemented";
361 handler.force_close = function ( self, err )
362 if bufferqueuelen ~= 0 then
363 out_put("server.lua: discarding unwritten data for ", tostring(ip), ":", tostring(clientport))
366 return self:close(err);
368 handler.close = function( self, err )
369 if not handler then return true; end
370 _readlistlen = removesocket( _readlist, socket, _readlistlen )
371 _readtimes[ handler ] = nil
372 if bufferqueuelen ~= 0 then
373 handler.sendbuffer() -- Try now to send any outstanding data
374 if bufferqueuelen ~= 0 then -- Still not empty, so we'll try again later
376 handler.write = nil -- ... but no further writing allowed
383 _ = shutdown and shutdown( socket )
385 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
386 _socketlist[ socket ] = nil
389 out_put "server.lua: socket already closed"
392 _writetimes[ handler ] = nil
393 _closelist[ handler ] = nil
394 local _handler = handler;
397 disconnect(_handler, err or false);
404 out_put "server.lua: closed client handler and removed socket from list"
407 handler.ip = function( )
410 handler.serverport = function( )
413 handler.clientport = function( )
416 handler.port = handler.clientport -- COMPAT server_event
417 local write = function( self, data )
418 bufferlen = bufferlen + #data
419 if bufferlen > maxsendlen then
420 _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle
421 handler.write = idfalse -- dont write anymore
423 elseif socket and not _sendlist[ socket ] then
424 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
426 bufferqueuelen = bufferqueuelen + 1
427 bufferqueue[ bufferqueuelen ] = data
429 _writetimes[ handler ] = _writetimes[ handler ] or _currenttime
433 handler.write = write
434 handler.bufferqueue = function( self )
437 handler.socket = function( self )
440 handler.set_mode = function( self, new )
441 pattern = new or pattern
444 handler.set_send = function ( self, newsend )
445 send = newsend or send
448 handler.bufferlen = function( self, readlen, sendlen )
449 maxsendlen = sendlen or maxsendlen
450 maxreadlen = readlen or maxreadlen
451 return bufferlen, maxreadlen, maxsendlen
454 handler.lock_read = function (self, switch)
455 if switch == true then
456 local tmp = _readlistlen
457 _readlistlen = removesocket( _readlist, socket, _readlistlen )
458 _readtimes[ handler ] = nil
459 if _readlistlen ~= tmp then
462 elseif switch == false then
465 _readlistlen = addsocket(_readlist, socket, _readlistlen)
466 _readtimes[ handler ] = _currenttime
471 handler.pause = function (self)
472 return self:lock_read(true);
474 handler.resume = function (self)
475 return self:lock_read(false);
477 handler.lock = function( self, switch )
478 handler.lock_read (switch)
479 if switch == true then
480 handler.write = idfalse
481 local tmp = _sendlistlen
482 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
483 _writetimes[ handler ] = nil
484 if _sendlistlen ~= tmp then
487 elseif switch == false then
488 handler.write = write
494 return noread, nosend
496 local _readbuffer = function( ) -- this function reads data
497 local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern"
498 if not err or (err == "wantread" or err == "timeout") then -- received something
499 local buffer = buffer or part or ""
501 if len > maxreadlen then
502 handler:close( "receive buffer exceeded" )
505 local count = len * STAT_UNIT
506 readtraffic = readtraffic + count
507 _readtraffic = _readtraffic + count
508 _readtimes[ handler ] = _currenttime
509 --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )
510 return dispatch( handler, buffer, err )
511 else -- connections was closed or fatal error
512 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )
514 _ = handler and handler:force_close( err )
518 local _sendbuffer = function( ) -- this function sends data
519 local succ, err, byte, buffer, count;
521 buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )
522 succ, err, byte = send( socket, buffer, 1, bufferlen )
523 count = ( succ or byte or 0 ) * STAT_UNIT
524 sendtraffic = sendtraffic + count
525 _sendtraffic = _sendtraffic + count
526 for i = bufferqueuelen,1,-1 do
527 bufferqueue[ i ] = nil
529 --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )
531 succ, err, count = false, "unexpected close", 0;
533 if succ then -- sending succesful
536 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist
537 _writetimes[ handler ] = nil
541 _ = needtls and handler:starttls(nil)
542 _ = toclose and handler:force_close( )
544 elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
545 buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer
546 bufferqueue[ 1 ] = buffer -- insert new buffer in queue
548 bufferlen = bufferlen - byte
549 _writetimes[ handler ] = _currenttime
551 else -- connection was closed during sending or fatal error
552 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )
554 _ = handler and handler:force_close( err )
561 function handler.set_sslctx(self, new_sslctx)
564 handshake = coroutine_wrap( function( client ) -- create handshake coroutine
566 for i = 1, _maxsslhandshake do
567 _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen
568 _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen
569 read, wrote = nil, nil
570 _, err = client:dohandshake( )
572 out_put( "server.lua: ssl handshake done" )
573 handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions
574 handler.sendbuffer = _sendbuffer
575 _ = status and status( handler, "ssl-handshake-complete" )
576 if self.autostart_ssl and listeners.onconnect then
577 listeners.onconnect(self);
579 _readlistlen = addsocket(_readlist, client, _readlistlen)
582 if err == "wantwrite" then
583 _sendlistlen = addsocket(_sendlist, client, _sendlistlen)
585 elseif err == "wantread" then
586 _readlistlen = addsocket(_readlist, client, _readlistlen)
592 coroutine_yield( ) -- handshake not finished
595 out_put( "server.lua: ssl handshake error: ", tostring(err or "handshake too long") )
596 _ = handler and handler:force_close("ssl handshake failed")
597 return false, err -- handshake failed
602 handler.starttls = function( self, _sslctx)
604 handler:set_sslctx(_sslctx);
606 if bufferqueuelen > 0 then
607 out_put "server.lua: we need to do tls, but delaying until send buffer empty"
611 out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )
612 local oldsocket, err = socket
613 socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
615 out_put( "server.lua: error while starting tls on client: ", tostring(err or "unknown error") )
616 return nil, err -- fatal error
619 socket:settimeout( 0 )
621 -- add the new socket to our system
623 receive = socket.receive
625 _socketlist[ socket ] = handler
626 _readlistlen = addsocket(_readlist, socket, _readlistlen)
628 -- remove traces of the old socket
629 _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )
630 _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )
631 _socketlist[ oldsocket ] = nil
633 handler.starttls = nil
636 -- Secure now (if handshake fails connection will close)
639 handler.readbuffer = handshake
640 handler.sendbuffer = handshake
641 return handshake( socket ) -- do handshake
645 handler.readbuffer = _readbuffer
646 handler.sendbuffer = _sendbuffer
648 receive = socket.receive
649 shutdown = ( ssl and id ) or socket.shutdown
651 _socketlist[ socket ] = handler
652 _readlistlen = addsocket(_readlist, socket, _readlistlen)
654 if sslctx and luasec then
655 out_put "server.lua: auto-starting ssl negotiation..."
656 handler.autostart_ssl = true;
657 local ok, err = handler:starttls(sslctx);
663 return handler, socket
669 idfalse = function( )
673 addsocket = function( list, socket, len )
674 if not list[ socket ] then
682 removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )
683 local pos = list[ socket ]
686 local last = list[ len ]
688 if last ~= socket then
697 closesocket = function( socket )
698 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
699 _readlistlen = removesocket( _readlist, socket, _readlistlen )
700 _socketlist[ socket ] = nil
705 local function link(sender, receiver, buffersize)
707 local _sendbuffer = receiver.sendbuffer;
708 function receiver.sendbuffer()
710 if sender_locked and receiver.bufferlen() < buffersize then
711 sender:lock_read(false); -- Unlock now
716 local _readbuffer = sender.readbuffer;
717 function sender.readbuffer()
719 if not sender_locked and receiver.bufferlen() >= buffersize then
720 sender_locked = true;
721 sender:lock_read(true);
724 sender:set_mode("*a");
727 ----------------------------------// PUBLIC //--
729 addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server
731 if type( listeners ) ~= "table" then
732 err = "invalid listener table"
734 if type( port ) ~= "number" or not ( port >= 0 and port <= 65535 ) then
736 elseif _server[ addr..":"..port ] then
737 err = "listeners on '[" .. addr .. "]:" .. port .. "' already exist"
738 elseif sslctx and not luasec then
739 err = "luasec not found"
742 out_error( "server.lua, [", addr, "]:", port, ": ", err )
746 local server, err = socket_bind( addr, port, _tcpbacklog )
748 out_error( "server.lua, [", addr, "]:", port, ": ", err )
751 local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx ) -- wrap new server socket
756 server:settimeout( 0 )
757 _readlistlen = addsocket(_readlist, server, _readlistlen)
758 _server[ addr..":"..port ] = handler
759 _socketlist[ server ] = handler
760 out_put( "server.lua: new "..(sslctx and "ssl " or "").."server listener on '[", addr, "]:", port, "'" )
764 getserver = function ( addr, port )
765 return _server[ addr..":"..port ];
768 removeserver = function( addr, port )
769 local handler = _server[ addr..":"..port ]
771 return nil, "no server found on '[" .. addr .. "]:" .. tostring( port ) .. "'"
774 _server[ addr..":"..port ] = nil
778 closeall = function( )
779 for _, handler in pairs( _socketlist ) do
781 _socketlist[ _ ] = nil
794 getsettings = function( )
796 select_timeout = _selecttimeout;
797 select_sleep_time = _sleeptime;
798 tcp_backlog = _tcpbacklog;
799 max_send_buffer_size = _maxsendlen;
800 max_receive_buffer_size = _maxreadlen;
801 select_idle_check_interval = _checkinterval;
802 send_timeout = _sendtimeout;
803 read_timeout = _readtimeout;
804 max_connections = _maxselectlen;
805 max_ssl_handshake_roundtrips = _maxsslhandshake;
806 highest_allowed_fd = _maxfd;
807 accept_retry_interval = _accepretry;
811 changesettings = function( new )
812 if type( new ) ~= "table" then
813 return nil, "invalid settings table"
815 _selecttimeout = tonumber( new.select_timeout ) or _selecttimeout
816 _sleeptime = tonumber( new.select_sleep_time ) or _sleeptime
817 _maxsendlen = tonumber( new.max_send_buffer_size ) or _maxsendlen
818 _maxreadlen = tonumber( new.max_receive_buffer_size ) or _maxreadlen
819 _checkinterval = tonumber( new.select_idle_check_interval ) or _checkinterval
820 _tcpbacklog = tonumber( new.tcp_backlog ) or _tcpbacklog
821 _sendtimeout = tonumber( new.send_timeout ) or _sendtimeout
822 _readtimeout = tonumber( new.read_timeout ) or _readtimeout
823 _accepretry = tonumber( new.accept_retry_interval ) or _accepretry
824 _maxselectlen = new.max_connections or _maxselectlen
825 _maxsslhandshake = new.max_ssl_handshake_roundtrips or _maxsslhandshake
826 _maxfd = new.highest_allowed_fd or _maxfd
830 addtimer = function( listener )
831 if type( listener ) ~= "function" then
832 return nil, "invalid listener function"
834 _timerlistlen = _timerlistlen + 1
835 _timerlist[ _timerlistlen ] = listener
840 return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen
845 local function setquitting(quit)
846 quitting = not not quit;
849 loop = function(once) -- this is the main loop of the program
850 if quitting then return "quitting"; end
851 if once then quitting = "once"; end
852 local next_timer_time = math_huge;
854 local read, write, err = socket_select( _readlist, _sendlist, math_min(_selecttimeout, next_timer_time) )
855 for i, socket in ipairs( write ) do -- send data waiting in writequeues
856 local handler = _socketlist[ socket ]
858 handler.sendbuffer( )
860 closesocket( socket )
861 out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen
864 for i, socket in ipairs( read ) do -- receive data
865 local handler = _socketlist[ socket ]
867 handler.readbuffer( )
869 closesocket( socket )
870 out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
873 for handler, err in pairs( _closelist ) do
874 handler.disconnect( )( handler, err )
875 handler:force_close() -- forced disconnect
876 _closelist[ handler ] = nil;
878 _currenttime = luasocket_gettime( )
880 -- Check for socket timeouts
881 local difftime = os_difftime( _currenttime - _starttime )
882 if difftime > _checkinterval then
883 _starttime = _currenttime
884 for handler, timestamp in pairs( _writetimes ) do
885 if os_difftime( _currenttime - timestamp ) > _sendtimeout then
886 --_writetimes[ handler ] = nil
887 handler.disconnect( )( handler, "send timeout" )
888 handler:force_close() -- forced disconnect
891 for handler, timestamp in pairs( _readtimes ) do
892 if os_difftime( _currenttime - timestamp ) > _readtimeout then
893 --_readtimes[ handler ] = nil
894 handler.disconnect( )( handler, "read timeout" )
895 handler:close( ) -- forced disconnect?
901 if _currenttime - _timer >= math_min(next_timer_time, 1) then
902 next_timer_time = math_huge;
903 for i = 1, _timerlistlen do
904 local t = _timerlist[ i ]( _currenttime ) -- fire timers
905 if t then next_timer_time = math_min(next_timer_time, t); end
907 _timer = _currenttime
909 next_timer_time = next_timer_time - (_currenttime - _timer);
912 for server, paused_time in pairs( _fullservers ) do
913 if _currenttime - paused_time > _accepretry then
914 _fullservers[ server ] = nil;
919 -- wait some time (0 by default)
920 socket_sleep( _sleeptime )
922 if once and quitting == "once" then quitting = nil; return; end
926 local function step()
930 local function get_backend()
934 --// EXPERIMENTAL //--
936 local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx )
937 local handler, socket, err = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx )
938 if not handler then return nil, err end
939 _socketlist[ socket ] = handler
941 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
942 if listeners.onconnect then
943 -- When socket is writeable, call onconnect
944 local _sendbuffer = handler.sendbuffer;
945 handler.sendbuffer = function ()
946 handler.sendbuffer = _sendbuffer;
947 listeners.onconnect(handler);
948 return _sendbuffer(); -- Send any queued outgoing data
952 return handler, socket
955 local addclient = function( address, port, listeners, pattern, sslctx )
956 local client, err = luasocket.tcp( )
960 client:settimeout( 0 )
961 _, err = client:connect( address, port )
962 if err then -- try again
963 local handler = wrapclient( client, address, port, listeners )
965 wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx )
969 --// EXPERIMENTAL //--
971 ----------------------------------// BEGIN //--
973 use "setmetatable" ( _socketlist, { __mode = "k" } )
974 use "setmetatable" ( _readtimes, { __mode = "k" } )
975 use "setmetatable" ( _writetimes, { __mode = "k" } )
977 _timer = luasocket_gettime( )
978 _starttime = luasocket_gettime( )
980 local function setlogger(new_logger)
981 local old_logger = log;
988 ----------------------------------// PUBLIC INTERFACE //--
991 _addtimer = addtimer,
993 addclient = addclient,
994 wrapclient = wrapclient,
1000 closeall = closeall,
1001 addserver = addserver,
1002 getserver = getserver,
1003 setlogger = setlogger,
1004 getsettings = getsettings,
1005 setquitting = setquitting,
1006 removeserver = removeserver,
1007 get_backend = get_backend,
1008 changesettings = changesettings,