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 has_luasec, luasec = pcall ( require , "ssl" )
52 local luasocket = use "socket" or require "socket"
53 local luasocket_gettime = luasocket.gettime
54 local getaddrinfo = luasocket.dns.getaddrinfo
56 --// extern lib methods //--
58 local ssl_wrap = ( has_luasec and luasec.wrap )
59 local socket_bind = luasocket.bind
60 local socket_sleep = luasocket.sleep
61 local socket_select = luasocket.select
94 --// simple data types //--
124 local _maxsslhandshake
126 ----------------------------------// DEFINITION //--
128 _server = { } -- key = port, value = table; list of listening servers
129 _readlist = { } -- array with sockets to read from
130 _sendlist = { } -- arrary with sockets to write to
131 _timerlist = { } -- array of timer functions
132 _socketlist = { } -- key = socket, value = wrapped socket (handlers)
133 _readtimes = { } -- key = handler, value = timestamp of last data reading
134 _writetimes = { } -- key = handler, value = timestamp of last data writing/sending
135 _closelist = { } -- handlers to close
136 _fullservers = { } -- servers in a paused state while there are too many clients
138 _readlistlen = 0 -- length of readlist
139 _sendlistlen = 0 -- length of sendlist
140 _timerlistlen = 0 -- lenght of timerlist
142 _sendtraffic = 0 -- some stats
145 _selecttimeout = 1 -- timeout of socket.select
146 _sleeptime = 0 -- time to wait at the end of every loop
147 _tcpbacklog = 128 -- some kind of hint to the OS
148 _accepretry = 10 -- seconds to wait until the next attempt of a full server to accept
150 _maxsendlen = 51000 * 1024 -- max len of send buffer
151 _maxreadlen = 25000 * 1024 -- max len of read buffer
153 _checkinterval = 30 -- interval in secs to check idle clients
154 _sendtimeout = 60000 -- allowed send idle time in secs
155 _readtimeout = 6 * 60 * 60 -- allowed read idle time in secs
157 local is_windows = package.config:sub(1,1) == "\\" -- check the directory separator, to detemine whether this is Windows
158 _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
159 _maxselectlen = luasocket._SETSIZE or 1024 -- But this still applies on Windows
161 _maxsslhandshake = 30 -- max handshake round-trips
163 ----------------------------------// PRIVATE //--
165 wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- this function wraps a server -- FIXME Make sure FD < _maxfd
167 if socket:getfd() >= _maxfd then
168 out_error("server.lua: Disallowed FD number: "..socket:getfd())
170 return nil, "fd-too-large"
173 local connections = 0
175 local dispatch, disconnect = listeners.onconnect, listeners.ondisconnect
177 local accept = socket.accept
179 --// public methods of the object //--
183 handler.shutdown = function( ) end
185 handler.ssl = function( )
188 handler.sslctx = function( )
191 handler.remove = function( )
192 connections = connections - 1
197 handler.close = function()
199 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
200 _readlistlen = removesocket( _readlist, socket, _readlistlen )
201 _server[ip..":"..serverport] = nil;
202 _socketlist[ socket ] = nil
206 out_put "server.lua: closed server handler and removed sockets from list"
208 handler.pause = function( hard )
209 if not handler.paused then
210 _readlistlen = removesocket( _readlist, socket, _readlistlen )
212 _socketlist[ socket ] = nil
216 handler.paused = true;
217 out_put("server.lua: server [", ip, "]:", serverport, " paused")
220 handler.resume = function( )
221 if handler.paused then
223 socket = socket_bind( ip, serverport, _tcpbacklog );
224 socket:settimeout( 0 )
226 _readlistlen = addsocket(_readlist, socket, _readlistlen)
227 _socketlist[ socket ] = handler
228 _fullservers[ handler ] = nil
229 handler.paused = false;
230 out_put("server.lua: server [", ip, "]:", serverport, " resumed")
233 handler.ip = function( )
236 handler.serverport = function( )
239 handler.socket = function( )
242 handler.readbuffer = function( )
243 if _readlistlen >= _maxselectlen or _sendlistlen >= _maxselectlen then
245 _fullservers[ handler ] = _currenttime
246 out_put( "server.lua: refused new client connection: server full" )
249 local client, err = accept( socket ) -- try to accept
251 local ip, clientport = client:getpeername( )
252 local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx ) -- wrap new client socket
253 if err then -- error while wrapping ssl socket
256 connections = connections + 1
257 out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))
258 if dispatch and not sslctx then -- SSL connections will notify onconnect when handshake completes
259 return dispatch( handler );
262 elseif err then -- maybe timeout or something else
263 out_put( "server.lua: error with new client connection: ", tostring(err) )
265 _fullservers[ handler ] = _currenttime
272 wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx ) -- this function wraps a client to a handler object
274 if socket:getfd() >= _maxfd then
275 out_error("server.lua: Disallowed FD number: "..socket:getfd()) -- PROTIP: Switch to libevent
276 socket:close( ) -- Should we send some kind of error here?
278 _fullservers[ server ] = _currenttime
281 return nil, nil, "fd-too-large"
283 socket:settimeout( 0 )
285 --// local import of socket methods //--
291 --// private closures of the object //--
295 local dispatch = listeners.onincoming
296 local status = listeners.onstatus
297 local disconnect = listeners.ondisconnect
298 local drain = listeners.ondrain
299 local onreadtimeout = listeners.onreadtimeout;
300 local detach = listeners.ondetach
302 local bufferqueue = { } -- buffer array
303 local bufferqueuelen = 0 -- end of buffer array
314 local sendtraffic, readtraffic = 0, 0
316 local maxsendlen = _maxsendlen
317 local maxreadlen = _maxreadlen
319 --// public methods of the object //--
321 local handler = bufferqueue -- saves a table ^_^
323 handler.dispatch = function( )
326 handler.disconnect = function( )
329 handler.onreadtimeout = onreadtimeout;
331 handler.setlistener = function( self, listeners )
333 detach(self) -- Notify listener that it is no longer responsible for this connection
335 dispatch = listeners.onincoming
336 disconnect = listeners.ondisconnect
337 status = listeners.onstatus
338 drain = listeners.ondrain
339 handler.onreadtimeout = listeners.onreadtimeout
340 detach = listeners.ondetach
342 handler.getstats = function( )
343 return readtraffic, sendtraffic
345 handler.ssl = function( )
348 handler.sslctx = function ( )
351 handler.send = function( _, data, i, j )
352 return send( socket, data, i, j )
354 handler.receive = function( pattern, prefix )
355 return receive( socket, pattern, prefix )
357 handler.shutdown = function( pattern )
358 return shutdown( socket, pattern )
360 handler.setoption = function (self, option, value)
361 if socket.setoption then
362 return socket:setoption(option, value);
364 return false, "setoption not implemented";
366 handler.force_close = function ( self, err )
367 if bufferqueuelen ~= 0 then
368 out_put("server.lua: discarding unwritten data for ", tostring(ip), ":", tostring(clientport))
371 return self:close(err);
373 handler.close = function( self, err )
374 if not handler then return true; end
375 _readlistlen = removesocket( _readlist, socket, _readlistlen )
376 _readtimes[ handler ] = nil
377 if bufferqueuelen ~= 0 then
378 handler.sendbuffer() -- Try now to send any outstanding data
379 if bufferqueuelen ~= 0 then -- Still not empty, so we'll try again later
381 handler.write = nil -- ... but no further writing allowed
388 _ = shutdown and shutdown( socket )
390 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
391 _socketlist[ socket ] = nil
394 out_put "server.lua: socket already closed"
397 _writetimes[ handler ] = nil
398 _closelist[ handler ] = nil
399 local _handler = handler;
402 disconnect(_handler, err or false);
409 out_put "server.lua: closed client handler and removed socket from list"
412 handler.server = function ( )
415 handler.ip = function( )
418 handler.serverport = function( )
421 handler.clientport = function( )
424 handler.port = handler.clientport -- COMPAT server_event
425 local write = function( self, data )
426 bufferlen = bufferlen + #data
427 if bufferlen > maxsendlen then
428 _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle
429 handler.write = idfalse -- dont write anymore
431 elseif socket and not _sendlist[ socket ] then
432 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
434 bufferqueuelen = bufferqueuelen + 1
435 bufferqueue[ bufferqueuelen ] = data
437 _writetimes[ handler ] = _writetimes[ handler ] or _currenttime
441 handler.write = write
442 handler.bufferqueue = function( self )
445 handler.socket = function( self )
448 handler.set_mode = function( self, new )
449 pattern = new or pattern
452 handler.set_send = function ( self, newsend )
453 send = newsend or send
456 handler.bufferlen = function( self, readlen, sendlen )
457 maxsendlen = sendlen or maxsendlen
458 maxreadlen = readlen or maxreadlen
459 return bufferlen, maxreadlen, maxsendlen
462 handler.lock_read = function (self, switch)
463 if switch == true then
464 local tmp = _readlistlen
465 _readlistlen = removesocket( _readlist, socket, _readlistlen )
466 _readtimes[ handler ] = nil
467 if _readlistlen ~= tmp then
470 elseif switch == false then
473 _readlistlen = addsocket(_readlist, socket, _readlistlen)
474 _readtimes[ handler ] = _currenttime
479 handler.pause = function (self)
480 return self:lock_read(true);
482 handler.resume = function (self)
483 return self:lock_read(false);
485 handler.lock = function( self, switch )
486 handler.lock_read (switch)
487 if switch == true then
488 handler.write = idfalse
489 local tmp = _sendlistlen
490 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
491 _writetimes[ handler ] = nil
492 if _sendlistlen ~= tmp then
495 elseif switch == false then
496 handler.write = write
502 return noread, nosend
504 local _readbuffer = function( ) -- this function reads data
505 local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern"
506 if not err or (err == "wantread" or err == "timeout") then -- received something
507 local buffer = buffer or part or ""
509 if len > maxreadlen then
510 handler:close( "receive buffer exceeded" )
513 local count = len * STAT_UNIT
514 readtraffic = readtraffic + count
515 _readtraffic = _readtraffic + count
516 _readtimes[ handler ] = _currenttime
517 --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )
518 return dispatch( handler, buffer, err )
519 else -- connections was closed or fatal error
520 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )
522 _ = handler and handler:force_close( err )
526 local _sendbuffer = function( ) -- this function sends data
527 local succ, err, byte, buffer, count;
529 buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )
530 succ, err, byte = send( socket, buffer, 1, bufferlen )
531 count = ( succ or byte or 0 ) * STAT_UNIT
532 sendtraffic = sendtraffic + count
533 _sendtraffic = _sendtraffic + count
534 for i = bufferqueuelen,1,-1 do
535 bufferqueue[ i ] = nil
537 --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )
539 succ, err, count = false, "unexpected close", 0;
541 if succ then -- sending succesful
544 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist
545 _writetimes[ handler ] = nil
549 _ = needtls and handler:starttls(nil)
550 _ = toclose and handler:force_close( )
552 elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
553 buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer
554 bufferqueue[ 1 ] = buffer -- insert new buffer in queue
556 bufferlen = bufferlen - byte
557 _writetimes[ handler ] = _currenttime
559 else -- connection was closed during sending or fatal error
560 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )
562 _ = handler and handler:force_close( err )
569 function handler.set_sslctx(self, new_sslctx)
572 handshake = coroutine_wrap( function( client ) -- create handshake coroutine
574 for i = 1, _maxsslhandshake do
575 _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen
576 _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen
577 read, wrote = nil, nil
578 _, err = client:dohandshake( )
580 out_put( "server.lua: ssl handshake done" )
581 handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions
582 handler.sendbuffer = _sendbuffer
583 _ = status and status( handler, "ssl-handshake-complete" )
584 if self.autostart_ssl and listeners.onconnect then
585 listeners.onconnect(self);
586 if bufferqueuelen ~= 0 then
587 _sendlistlen = addsocket(_sendlist, client, _sendlistlen)
590 _readlistlen = addsocket(_readlist, client, _readlistlen)
593 if err == "wantwrite" then
594 _sendlistlen = addsocket(_sendlist, client, _sendlistlen)
596 elseif err == "wantread" then
597 _readlistlen = addsocket(_readlist, client, _readlistlen)
603 coroutine_yield( ) -- handshake not finished
606 err = "ssl handshake error: " .. ( err or "handshake too long" );
607 out_put( "server.lua: ", err );
608 _ = handler and handler:force_close(err)
609 return false, err -- handshake failed
614 handler.starttls = function( self, _sslctx)
616 handler:set_sslctx(_sslctx);
618 if bufferqueuelen > 0 then
619 out_put "server.lua: we need to do tls, but delaying until send buffer empty"
623 out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )
624 local oldsocket, err = socket
625 socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
627 out_put( "server.lua: error while starting tls on client: ", tostring(err or "unknown error") )
628 return nil, err -- fatal error
631 socket:settimeout( 0 )
633 -- add the new socket to our system
635 receive = socket.receive
637 _socketlist[ socket ] = handler
638 _readlistlen = addsocket(_readlist, socket, _readlistlen)
640 -- remove traces of the old socket
641 _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )
642 _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )
643 _socketlist[ oldsocket ] = nil
645 handler.starttls = nil
648 -- Secure now (if handshake fails connection will close)
651 handler.readbuffer = handshake
652 handler.sendbuffer = handshake
653 return handshake( socket ) -- do handshake
657 handler.readbuffer = _readbuffer
658 handler.sendbuffer = _sendbuffer
660 receive = socket.receive
661 shutdown = ( ssl and id ) or socket.shutdown
663 _socketlist[ socket ] = handler
664 _readlistlen = addsocket(_readlist, socket, _readlistlen)
666 if sslctx and has_luasec then
667 out_put "server.lua: auto-starting ssl negotiation..."
668 handler.autostart_ssl = true;
669 local ok, err = handler:starttls(sslctx);
675 return handler, socket
681 idfalse = function( )
685 addsocket = function( list, socket, len )
686 if not list[ socket ] then
694 removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )
695 local pos = list[ socket ]
698 local last = list[ len ]
700 if last ~= socket then
709 closesocket = function( socket )
710 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
711 _readlistlen = removesocket( _readlist, socket, _readlistlen )
712 _socketlist[ socket ] = nil
717 local function link(sender, receiver, buffersize)
719 local _sendbuffer = receiver.sendbuffer;
720 function receiver.sendbuffer()
722 if sender_locked and receiver.bufferlen() < buffersize then
723 sender:lock_read(false); -- Unlock now
728 local _readbuffer = sender.readbuffer;
729 function sender.readbuffer()
731 if not sender_locked and receiver.bufferlen() >= buffersize then
732 sender_locked = true;
733 sender:lock_read(true);
736 sender:set_mode("*a");
739 ----------------------------------// PUBLIC //--
741 addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server
744 if type( listeners ) ~= "table" then
745 err = "invalid listener table"
746 elseif type ( addr ) ~= "string" then
747 err = "invalid address"
748 elseif type( port ) ~= "number" or not ( port >= 0 and port <= 65535 ) then
750 elseif _server[ addr..":"..port ] then
751 err = "listeners on '[" .. addr .. "]:" .. port .. "' already exist"
752 elseif sslctx and not has_luasec then
753 err = "luasec not found"
756 out_error( "server.lua, [", addr, "]:", port, ": ", err )
759 local server, err = socket_bind( addr, port, _tcpbacklog )
761 out_error( "server.lua, [", addr, "]:", port, ": ", err )
764 local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx ) -- wrap new server socket
769 server:settimeout( 0 )
770 _readlistlen = addsocket(_readlist, server, _readlistlen)
771 _server[ addr..":"..port ] = handler
772 _socketlist[ server ] = handler
773 out_put( "server.lua: new "..(sslctx and "ssl " or "").."server listener on '[", addr, "]:", port, "'" )
777 getserver = function ( addr, port )
778 return _server[ addr..":"..port ];
781 removeserver = function( addr, port )
782 local handler = _server[ addr..":"..port ]
784 return nil, "no server found on '[" .. addr .. "]:" .. tostring( port ) .. "'"
787 _server[ addr..":"..port ] = nil
791 closeall = function( )
792 for _, handler in pairs( _socketlist ) do
794 _socketlist[ _ ] = nil
807 getsettings = function( )
809 select_timeout = _selecttimeout;
810 select_sleep_time = _sleeptime;
811 tcp_backlog = _tcpbacklog;
812 max_send_buffer_size = _maxsendlen;
813 max_receive_buffer_size = _maxreadlen;
814 select_idle_check_interval = _checkinterval;
815 send_timeout = _sendtimeout;
816 read_timeout = _readtimeout;
817 max_connections = _maxselectlen;
818 max_ssl_handshake_roundtrips = _maxsslhandshake;
819 highest_allowed_fd = _maxfd;
820 accept_retry_interval = _accepretry;
824 changesettings = function( new )
825 if type( new ) ~= "table" then
826 return nil, "invalid settings table"
828 _selecttimeout = tonumber( new.select_timeout ) or _selecttimeout
829 _sleeptime = tonumber( new.select_sleep_time ) or _sleeptime
830 _maxsendlen = tonumber( new.max_send_buffer_size ) or _maxsendlen
831 _maxreadlen = tonumber( new.max_receive_buffer_size ) or _maxreadlen
832 _checkinterval = tonumber( new.select_idle_check_interval ) or _checkinterval
833 _tcpbacklog = tonumber( new.tcp_backlog ) or _tcpbacklog
834 _sendtimeout = tonumber( new.send_timeout ) or _sendtimeout
835 _readtimeout = tonumber( new.read_timeout ) or _readtimeout
836 _accepretry = tonumber( new.accept_retry_interval ) or _accepretry
837 _maxselectlen = new.max_connections or _maxselectlen
838 _maxsslhandshake = new.max_ssl_handshake_roundtrips or _maxsslhandshake
839 _maxfd = new.highest_allowed_fd or _maxfd
843 addtimer = function( listener )
844 if type( listener ) ~= "function" then
845 return nil, "invalid listener function"
847 _timerlistlen = _timerlistlen + 1
848 _timerlist[ _timerlistlen ] = listener
853 return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen
858 local function setquitting(quit)
859 quitting = not not quit;
862 loop = function(once) -- this is the main loop of the program
863 if quitting then return "quitting"; end
864 if once then quitting = "once"; end
865 local next_timer_time = math_huge;
867 local read, write, err = socket_select( _readlist, _sendlist, math_min(_selecttimeout, next_timer_time) )
868 for i, socket in ipairs( write ) do -- send data waiting in writequeues
869 local handler = _socketlist[ socket ]
871 handler.sendbuffer( )
873 closesocket( socket )
874 out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen
877 for i, socket in ipairs( read ) do -- receive data
878 local handler = _socketlist[ socket ]
880 handler.readbuffer( )
882 closesocket( socket )
883 out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
886 for handler, err in pairs( _closelist ) do
887 handler.disconnect( )( handler, err )
888 handler:force_close() -- forced disconnect
889 _closelist[ handler ] = nil;
891 _currenttime = luasocket_gettime( )
893 -- Check for socket timeouts
894 local difftime = os_difftime( _currenttime - _starttime )
895 if difftime > _checkinterval then
896 _starttime = _currenttime
897 for handler, timestamp in pairs( _writetimes ) do
898 if os_difftime( _currenttime - timestamp ) > _sendtimeout then
899 handler.disconnect( )( handler, "send timeout" )
900 handler:force_close() -- forced disconnect
903 for handler, timestamp in pairs( _readtimes ) do
904 if os_difftime( _currenttime - timestamp ) > _readtimeout then
905 if not(handler.onreadtimeout) or handler:onreadtimeout() ~= true then
906 handler.disconnect( )( handler, "read timeout" )
907 handler:close( ) -- forced disconnect?
909 _readtimes[ handler ] = _currenttime -- reset timer
916 if _currenttime - _timer >= math_min(next_timer_time, 1) then
917 next_timer_time = math_huge;
918 for i = 1, _timerlistlen do
919 local t = _timerlist[ i ]( _currenttime ) -- fire timers
920 if t then next_timer_time = math_min(next_timer_time, t); end
922 _timer = _currenttime
924 next_timer_time = next_timer_time - (_currenttime - _timer);
927 for server, paused_time in pairs( _fullservers ) do
928 if _currenttime - paused_time > _accepretry then
929 _fullservers[ server ] = nil;
934 -- wait some time (0 by default)
935 socket_sleep( _sleeptime )
937 if once and quitting == "once" then quitting = nil; return; end
942 local function step()
946 local function get_backend()
950 --// EXPERIMENTAL //--
952 local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx )
953 local handler, socket, err = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx )
954 if not handler then return nil, err end
955 _socketlist[ socket ] = handler
957 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
958 if listeners.onconnect then
959 -- When socket is writeable, call onconnect
960 local _sendbuffer = handler.sendbuffer;
961 handler.sendbuffer = function ()
962 handler.sendbuffer = _sendbuffer;
963 listeners.onconnect(handler);
964 return _sendbuffer(); -- Send any queued outgoing data
968 return handler, socket
971 local addclient = function( address, port, listeners, pattern, sslctx, typ )
973 if type( listeners ) ~= "table" then
974 err = "invalid listener table"
975 elseif type ( address ) ~= "string" then
976 err = "invalid address"
977 elseif type( port ) ~= "number" or not ( port >= 0 and port <= 65535 ) then
979 elseif sslctx and not has_luasec then
980 err = "luasec not found"
983 local addrinfo, err = getaddrinfo(address)
984 if not addrinfo then return nil, err end
985 if addrinfo[1] and addrinfo[1].family == "inet6" then
991 local create = luasocket[typ]
992 if type( create ) ~= "function" then
993 err = "invalid socket type"
997 out_error( "server.lua, addclient: ", err )
1001 local client, err = create( )
1005 client:settimeout( 0 )
1006 local ok, err = client:connect( address, port )
1007 if ok or err == "timeout" then
1008 return wrapclient( client, address, port, listeners, pattern, sslctx )
1014 --// EXPERIMENTAL //--
1016 ----------------------------------// BEGIN //--
1018 use "setmetatable" ( _socketlist, { __mode = "k" } )
1019 use "setmetatable" ( _readtimes, { __mode = "k" } )
1020 use "setmetatable" ( _writetimes, { __mode = "k" } )
1022 _timer = luasocket_gettime( )
1023 _starttime = luasocket_gettime( )
1025 local function setlogger(new_logger)
1026 local old_logger = log;
1033 ----------------------------------// PUBLIC INTERFACE //--
1036 _addtimer = addtimer,
1038 addclient = addclient,
1039 wrapclient = wrapclient,
1045 closeall = closeall,
1046 addserver = addserver,
1047 getserver = getserver,
1048 setlogger = setlogger,
1049 getsettings = getsettings,
1050 setquitting = setquitting,
1051 removeserver = removeserver,
1052 get_backend = get_backend,
1053 changesettings = changesettings,