4 server.lua based on lua/libevent by blastbeat
7 -- when using luaevent, never register 2 or more EV_READ at one socket, same for EV_WRITE
8 -- you cant even register a new EV_READ/EV_WRITE callback inside another one
9 -- to do some of the above, use timeout events or something what will called from outside
10 -- dont let garbagecollect eventcallbacks, as long they are running
11 -- when using luasec, there are 4 cases of timeout errors: wantread or wantwrite during reading or writing
15 local SCRIPT_NAME = "server_event.lua"
16 local SCRIPT_VERSION = "0.05"
17 local SCRIPT_AUTHOR = "blastbeat"
18 local LAST_MODIFIED = "2009/11/20"
21 MAX_CONNECTIONS = 100000, -- max per server connections (use "ulimit -n" on *nix)
22 MAX_HANDSHAKE_ATTEMPTS= 1000, -- attempts to finish ssl handshake
23 HANDSHAKE_TIMEOUT = 60, -- timeout in seconds per handshake attempt
24 MAX_READ_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes allowed to read from sockets
25 MAX_SEND_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes size of write buffer (for writing on sockets)
26 ACCEPT_QUEUE = 128, -- might influence the length of the pending sockets queue
27 ACCEPT_DELAY = 10, -- seconds to wait until the next attempt of a full server to accept
28 READ_TIMEOUT = 60 * 60 * 6, -- timeout in seconds for read data from socket
29 WRITE_TIMEOUT = 180, -- timeout in seconds for write data on socket
30 CONNECT_TIMEOUT = 20, -- timeout in seconds for connection attempts
31 CLEAR_DELAY = 5, -- seconds to wait for clearing interface list (and calling ondisconnect listeners)
32 DEBUG = true, -- show debug messages
35 local function use(x) return rawget(_G, x); end
36 local ipairs = use "ipairs"
37 local string = use "string"
38 local select = use "select"
39 local require = use "require"
40 local tostring = use "tostring"
41 local coroutine = use "coroutine"
42 local setmetatable = use "setmetatable"
44 local t_insert = table.insert
45 local t_concat = table.concat
47 local has_luasec, ssl = pcall ( require , "ssl" )
48 local socket = use "socket" or require "socket"
49 local getaddrinfo = socket.dns.getaddrinfo
51 local log = require ("util.logger").init("socket")
53 local function debug(...)
54 return log("debug", ("%s "):rep(select('#', ...)), ...)
58 local bitor = ( function( ) -- thx Rici Lake
59 local hasbit = function( x, p )
60 return x % ( p + p ) >= p
62 return function( x, y )
65 local limit = x > y and x or y
67 if hasbit( x, p ) or hasbit( y, p ) then
76 local event = require "luaevent.core"
77 local base = event.new( )
78 local EV_READ = event.EV_READ
79 local EV_WRITE = event.EV_WRITE
80 local EV_TIMEOUT = event.EV_TIMEOUT
81 local EV_SIGNAL = event.EV_SIGNAL
83 local EV_READWRITE = bitor( EV_READ, EV_WRITE )
85 local interfacelist = ( function( ) -- holds the interfaces for sockets
88 return function( method, arg )
89 if "add" == method then
94 elseif "delete" == method then
96 return nil, "array is already empty"
98 local position = arg:_position() -- get position in array
99 if position ~= len then
100 local interface = array[ len ] -- get last interface
101 array[ position ] = interface -- copy it into free position
102 array[ len ] = nil -- free last position
103 interface:_position( position ) -- set new position in array
104 else -- free last position
115 -- Client interface methods
118 interface_mt = {}; interface_mt.__index = interface_mt;
120 local addevent = base.addevent
121 local coroutine_wrap, coroutine_yield = coroutine.wrap,coroutine.yield
124 function interface_mt:_position(new_position)
125 self.position = new_position or self.position
126 return self.position;
128 function interface_mt:_close()
129 return self:_destroy();
132 function interface_mt:_start_connection(plainssl) -- called from wrapclient
133 local callback = function( event )
134 if EV_TIMEOUT == event then -- timeout during connection
135 self.fatalerror = "connection timeout"
136 self:ontimeout() -- call timeout listener
138 debug( "new connection failed. id:", self.id, "error:", self.fatalerror )
140 if plainssl and has_luasec then -- start ssl session
141 self:starttls(self._sslctx, true)
142 else -- normal connection
143 self:_start_session(true)
145 debug( "new connection established. id:", self.id )
147 self.eventconnect = nil
150 self.eventconnect = addevent( base, self.conn, EV_WRITE, callback, cfg.CONNECT_TIMEOUT )
153 function interface_mt:_start_session(call_onconnect) -- new session, for example after startssl
154 if self.type == "client" then
155 local callback = function( )
156 self:_lock( false, false, false )
157 --vdebug( "start listening on client socket with id:", self.id )
158 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
159 if call_onconnect then
162 self.eventsession = nil
165 self.eventsession = addevent( base, nil, EV_TIMEOUT, callback, 0 )
168 --vdebug( "start listening on server socket with id:", self.id )
169 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback ) -- register callback
173 function interface_mt:_start_ssl(call_onconnect) -- old socket will be destroyed, therefore we have to close read/write events first
174 --vdebug( "starting ssl session with client id:", self.id )
176 _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks!
177 _ = self.eventwrite and self.eventwrite:close( )
178 self.eventread, self.eventwrite = nil, nil
180 self.conn, err = ssl.wrap( self.conn, self._sslctx )
182 self.fatalerror = err
183 self.conn = nil -- cannot be used anymore
184 if call_onconnect then
185 self.ondisconnect = nil -- dont call this when client isnt really connected
188 debug( "fatal error while ssl wrapping:", err )
191 self.conn:settimeout( 0 ) -- set non blocking
192 local handshakecallback = coroutine_wrap(
196 local maxattempt = cfg.MAX_HANDSHAKE_ATTEMPTS
197 while attempt < maxattempt do -- no endless loop
198 attempt = attempt + 1
199 debug( "ssl handshake of client with id:"..tostring(self)..", attempt:"..attempt )
200 if attempt > maxattempt then
201 self.fatalerror = "max handshake attempts exceeded"
202 elseif EV_TIMEOUT == event then
203 self.fatalerror = "timeout during handshake"
205 _, err = self.conn:dohandshake( )
207 self:_lock( false, false, false ) -- unlock the interface; sending, closing etc allowed
208 self.send = self.conn.send -- caching table lookups with new client object
209 self.receive = self.conn.receive
210 if not call_onconnect then -- trigger listener
211 self:onstatus("ssl-handshake-complete");
213 self:_start_session( call_onconnect )
214 debug( "ssl handshake done" )
215 self.eventhandshake = nil
218 if err == "wantwrite" then
220 elseif err == "wantread" then
223 debug( "ssl handshake error:", err )
224 self.fatalerror = err
227 if self.fatalerror then
228 if call_onconnect then
229 self.ondisconnect = nil -- dont call this when client isnt really connected
232 debug( "handshake failed because:", self.fatalerror )
233 self.eventhandshake = nil
236 event = coroutine_yield( event, cfg.HANDSHAKE_TIMEOUT ) -- yield this monster...
240 debug "starting handshake..."
241 self:_lock( false, true, true ) -- unlock read/write events, but keep interface locked
242 self.eventhandshake = addevent( base, self.conn, EV_READWRITE, handshakecallback, cfg.HANDSHAKE_TIMEOUT )
245 function interface_mt:_destroy() -- close this interface + events and call last listener
246 debug( "closing client with id:", self.id, self.fatalerror )
247 self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions
249 _ = self.eventread and self.eventread:close( )
250 if self.type == "client" then
251 _ = self.eventwrite and self.eventwrite:close( )
252 _ = self.eventhandshake and self.eventhandshake:close( )
253 _ = self.eventstarthandshake and self.eventstarthandshake:close( )
254 _ = self.eventconnect and self.eventconnect:close( )
255 _ = self.eventsession and self.eventsession:close( )
256 _ = self.eventwritetimeout and self.eventwritetimeout:close( )
257 _ = self.eventreadtimeout and self.eventreadtimeout:close( )
258 _ = self.ondisconnect and self:ondisconnect( self.fatalerror ~= "client to close" and self.fatalerror) -- call ondisconnect listener (wont be the case if handshake failed on connect)
259 _ = self.conn and self.conn:close( ) -- close connection
260 _ = self._server and self._server:counter(-1);
261 self.eventread, self.eventwrite = nil, nil
262 self.eventstarthandshake, self.eventhandshake, self.eventclose = nil, nil, nil
263 self.readcallback, self.writecallback = nil, nil
266 self.eventread, self.eventclose = nil, nil
267 self.interface, self.readcallback = nil, nil
269 interfacelist( "delete", self )
273 function interface_mt:_lock(nointerface, noreading, nowriting) -- lock or unlock this interface or events
274 self.nointerface, self.noreading, self.nowriting = nointerface, noreading, nowriting
275 return nointerface, noreading, nowriting
279 function interface_mt:lock_read(switch)
283 return self:resume();
287 function interface_mt:pause()
288 return self:_lock(self.nointerface, true, self.nowriting);
291 function interface_mt:resume()
292 self:_lock(self.nointerface, false, self.nowriting);
293 if not self.eventread then
294 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
298 function interface_mt:counter(c)
300 self._connections = self._connections + c
302 return self._connections
306 function interface_mt:write(data)
307 if self.nowriting then return nil, "locked" end
308 --vdebug( "try to send data to client, id/data:", self.id, data )
309 data = tostring( data )
311 local total = len + self.writebufferlen
312 if total > cfg.MAX_SEND_LENGTH then -- check buffer length
313 local err = "send buffer exceeded"
314 debug( "error:", err ) -- to much, check your app
317 t_insert(self.writebuffer, data) -- new buffer
318 self.writebufferlen = total
319 if not self.eventwrite then -- register new write event
320 --vdebug( "register new write event" )
321 self.eventwrite = addevent( base, self.conn, EV_WRITE, self.writecallback, cfg.WRITE_TIMEOUT )
325 function interface_mt:close()
326 if self.nointerface then return nil, "locked"; end
327 debug( "try to close client connection with id:", self.id )
328 if self.type == "client" then
329 self.fatalerror = "client to close"
330 if self.eventwrite then -- wait for incomplete write request
331 self:_lock( true, true, false )
332 debug "closing delayed until writebuffer is empty"
333 return nil, "writebuffer not empty, waiting"
335 self:_lock( true, true, true )
340 debug( "try to close server with id:", tostring(self.id))
341 self.fatalerror = "server to close"
348 function interface_mt:socket()
352 function interface_mt:server()
353 return self._server or self;
356 function interface_mt:port()
360 function interface_mt:serverport()
361 return self._serverport
364 function interface_mt:ip()
368 function interface_mt:ssl()
369 return self._usingssl
372 function interface_mt:type()
373 return self._type or "client"
376 function interface_mt:connections()
377 return self._connections
380 function interface_mt:address()
384 function interface_mt:set_sslctx(sslctx)
385 self._sslctx = sslctx;
387 self.starttls = nil; -- use starttls() of interface_mt
389 self.starttls = false; -- prevent starttls()
393 function interface_mt:set_mode(pattern)
395 self._pattern = pattern;
397 return self._pattern;
400 function interface_mt:set_send(new_send)
401 -- No-op, we always use the underlying connection's send
404 function interface_mt:starttls(sslctx, call_onconnect)
405 debug( "try to start ssl at client id:", self.id )
407 self._sslctx = sslctx;
408 if self._usingssl then -- startssl was already called
409 err = "ssl already active"
412 debug( "error:", err )
415 self._usingssl = true
416 self.startsslcallback = function( ) -- we have to start the handshake outside of a read/write event
417 self.startsslcallback = nil
418 self:_start_ssl(call_onconnect);
419 self.eventstarthandshake = nil
422 if not self.eventwrite then
423 self:_lock( true, true, true ) -- lock the interface, to not disturb the handshake
424 self.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, self.startsslcallback, 0 ) -- add event to start handshake
425 else -- wait until writebuffer is empty
426 self:_lock( true, true, false )
427 debug "ssl session delayed until writebuffer is empty..."
429 self.starttls = false;
433 function interface_mt:setoption(option, value)
434 if self.conn.setoption then
435 return self.conn:setoption(option, value);
437 return false, "setoption not implemented";
440 function interface_mt:setlistener(listener)
441 self.onconnect, self.ondisconnect, self.onincoming, self.ontimeout, self.onreadtimeout, self.onstatus
442 = listener.onconnect, listener.ondisconnect, listener.onincoming,
443 listener.ontimeout, listener.onreadtimeout, listener.onstatus;
447 function interface_mt:onconnect()
449 function interface_mt:onincoming()
451 function interface_mt:ondisconnect()
453 function interface_mt:ontimeout()
455 function interface_mt:onreadtimeout()
456 self.fatalerror = "timeout during receiving"
457 debug( "connection failed:", self.fatalerror )
461 function interface_mt:ondrain()
463 function interface_mt:onstatus()
467 -- End of client interface methods
471 local string_sub = string.sub -- caching table lookups
472 local addevent = base.addevent
473 local socket_gettime = socket.gettime
474 function handleclient( client, ip, port, server, pattern, listener, sslctx ) -- creates an client interface
475 --vdebug("creating client interfacce...")
479 currenttime = socket_gettime( ); -- safe the origin
480 writebuffer = {}; -- writebuffer
481 writebufferlen = 0; -- length of writebuffer
482 send = client.send; -- caching table lookups
483 receive = client.receive;
484 onconnect = listener.onconnect; -- will be called when client disconnects
485 ondisconnect = listener.ondisconnect; -- will be called when client disconnects
486 onincoming = listener.onincoming; -- will be called when client sends data
487 ontimeout = listener.ontimeout; -- called when fatal socket timeout occurs
488 onreadtimeout = listener.onreadtimeout; -- called when socket inactivity timeout occurs
489 ondrain = listener.ondrain; -- called when writebuffer is empty
490 onstatus = listener.onstatus; -- called for status changes (e.g. of SSL/TLS)
491 eventread = false, eventwrite = false, eventclose = false,
492 eventhandshake = false, eventstarthandshake = false; -- event handler
493 eventconnect = false, eventsession = false; -- more event handler...
494 eventwritetimeout = false; -- even more event handler...
495 eventreadtimeout = false;
496 fatalerror = false; -- error message
497 writecallback = false; -- will be called on write events
498 readcallback = false; -- will be called on read events
499 nointerface = true; -- lock/unlock parameter of this interface
500 noreading = false, nowriting = false; -- locks of the read/writecallback
501 startsslcallback = false; -- starting handshake callback
502 position = false; -- position of client in interfacelist
505 _ip = ip, _port = port, _server = server, _pattern = pattern,
506 _serverport = (server and server:port() or nil),
507 _sslctx = sslctx; -- parameters
508 _usingssl = false; -- client is using ssl;
510 if not has_luasec then interface.starttls = false; end
511 interface.id = tostring(interface):match("%x+$");
512 interface.writecallback = function( event ) -- called on write events
513 --vdebug( "new client write event, id/ip/port:", interface, ip, port )
514 if interface.nowriting or ( interface.fatalerror and ( "client to close" ~= interface.fatalerror ) ) then -- leave this event
515 --vdebug( "leaving this event because:", interface.nowriting or interface.fatalerror )
516 interface.eventwrite = false
519 if EV_TIMEOUT == event then -- took too long to write some data to socket -> disconnect
520 interface.fatalerror = "timeout during writing"
521 debug( "writing failed:", interface.fatalerror )
523 interface.eventwrite = false
526 if interface._usingssl then -- handle luasec
527 if interface.eventreadtimeout then -- we have to read first
528 local ret = interface.readcallback( ) -- call readcallback
529 --vdebug( "tried to read in writecallback, result:", ret )
531 if interface.eventwritetimeout then -- luasec only
532 interface.eventwritetimeout:close( ) -- first we have to close timeout event which where regged after a wantread error
533 interface.eventwritetimeout = false
536 interface.writebuffer = { t_concat(interface.writebuffer) }
537 local succ, err, byte = interface.conn:send( interface.writebuffer[1], 1, interface.writebufferlen )
538 --vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte )
539 if succ then -- writing succesful
540 interface.writebuffer[1] = nil
541 interface.writebufferlen = 0
543 if interface.fatalerror then
544 debug "closing client after writing"
545 interface:_close() -- close interface if needed
546 elseif interface.startsslcallback then -- start ssl connection if needed
547 debug "starting ssl handshake after writing"
548 interface.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, interface.startsslcallback, 0 )
549 elseif interface.eventreadtimeout then
550 return EV_WRITE, EV_TIMEOUT
552 interface.eventwrite = nil
554 elseif byte and (err == "timeout" or err == "wantwrite") then -- want write again
555 --vdebug( "writebuffer is not empty:", err )
556 interface.writebuffer[1] = string_sub( interface.writebuffer[1], byte + 1, interface.writebufferlen ) -- new buffer
557 interface.writebufferlen = interface.writebufferlen - byte
558 if "wantread" == err then -- happens only with luasec
559 local callback = function( )
561 interface.eventwritetimeout = nil
564 interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event
565 debug( "wantread during write attempt, reg it in readcallback but dont know what really happens next..." )
566 -- hopefully this works with luasec; its simply not possible to use 2 different write events on a socket in luaevent
569 return EV_WRITE, cfg.WRITE_TIMEOUT
570 else -- connection was closed during writing or fatal error
571 interface.fatalerror = err or "fatal error"
572 debug( "connection failed in write event:", interface.fatalerror )
574 interface.eventwrite = nil
580 interface.readcallback = function( event ) -- called on read events
581 --vdebug( "new client read event, id/ip/port:", tostring(interface.id), tostring(ip), tostring(port) )
582 if interface.noreading or interface.fatalerror then -- leave this event
583 --vdebug( "leaving this event because:", tostring(interface.noreading or interface.fatalerror) )
584 interface.eventread = nil
587 if EV_TIMEOUT == event and interface:onreadtimeout() ~= true then
588 return -1 -- took too long to get some data from client -> disconnect
590 if interface._usingssl then -- handle luasec
591 if interface.eventwritetimeout then -- ok, in the past writecallback was regged
592 local ret = interface.writecallback( ) -- call it
593 --vdebug( "tried to write in readcallback, result:", tostring(ret) )
595 if interface.eventreadtimeout then
596 interface.eventreadtimeout:close( )
597 interface.eventreadtimeout = nil
600 local buffer, err, part = interface.conn:receive( interface._pattern ) -- receive buffer with "pattern"
601 --vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) )
602 buffer = buffer or part
603 if buffer and #buffer > cfg.MAX_READ_LENGTH then -- check buffer length
604 interface.fatalerror = "receive buffer exceeded"
605 debug( "fatal error:", interface.fatalerror )
607 interface.eventread = nil
610 if err and ( err ~= "timeout" and err ~= "wantread" ) then
611 if "wantwrite" == err then -- need to read on write event
612 if not interface.eventwrite then -- register new write event if needed
613 interface.eventwrite = addevent( base, interface.conn, EV_WRITE, interface.writecallback, cfg.WRITE_TIMEOUT )
615 interface.eventreadtimeout = addevent( base, nil, EV_TIMEOUT,
618 end, cfg.READ_TIMEOUT
620 debug( "wantwrite during read attempt, reg it in writecallback but dont know what really happens next..." )
621 -- to be honest i dont know what happens next, if it is allowed to first read, the write etc...
622 else -- connection was closed or fatal error
623 interface.fatalerror = err
624 debug( "connection failed in read event:", interface.fatalerror )
626 interface.eventread = nil
630 interface.onincoming( interface, buffer, err ) -- send new data to listener
632 if interface.noreading then
633 interface.eventread = nil;
636 return EV_READ, cfg.READ_TIMEOUT
639 client:settimeout( 0 ) -- set non blocking
640 setmetatable(interface, interface_mt)
641 interfacelist( "add", interface ) -- add to interfacelist
648 function handleserver( server, addr, port, pattern, listener, sslctx ) -- creates an server interface
649 debug "creating server interface..."
654 onconnect = listener.onconnect; -- will be called when new client connected
655 eventread = false; -- read event handler
656 eventclose = false; -- close event handler
657 readcallback = false; -- read event callback
658 fatalerror = false; -- error message
659 nointerface = true; -- lock/unlock parameter
661 _ip = addr, _port = port, _pattern = pattern,
664 interface.id = tostring(interface):match("%x+$");
665 interface.readcallback = function( event ) -- server handler, called on incoming connections
666 --vdebug( "server can accept, id/addr/port:", interface, addr, port )
667 if interface.fatalerror then
668 --vdebug( "leaving this event because:", self.fatalerror )
669 interface.eventread = nil
672 local delay = cfg.ACCEPT_DELAY
673 if EV_TIMEOUT == event then
674 if interface._connections >= cfg.MAX_CONNECTIONS then -- check connection count
675 debug( "to many connections, seconds to wait for next accept:", delay )
676 return EV_TIMEOUT, delay -- timeout...
678 return EV_READ -- accept again
681 --vdebug("max connection check ok, accepting...")
682 local client, err = server:accept() -- try to accept; TODO: check err
684 if interface._connections >= cfg.MAX_CONNECTIONS then
685 client:close( ) -- refuse connection
686 debug( "maximal connections reached, refuse client connection; accept delay:", delay )
687 return EV_TIMEOUT, delay -- delay for next accept attempt
689 local client_ip, client_port = client:getpeername( )
690 interface._connections = interface._connections + 1 -- increase connection count
691 local clientinterface = handleclient( client, client_ip, client_port, interface, pattern, listener, sslctx )
692 --vdebug( "client id:", clientinterface, "startssl:", startssl )
693 if has_luasec and sslctx then
694 clientinterface:starttls(sslctx, true)
696 clientinterface:_start_session( true )
698 debug( "accepted incoming client connection from:", client_ip or "<unknown IP>", client_port or "<unknown port>", "to", port or "<unknown port>");
700 client, err = server:accept() -- try to accept again
705 server:settimeout( 0 )
706 setmetatable(interface, interface_mt)
707 interfacelist( "add", interface )
708 interface:_start_session()
713 local addserver = ( function( )
714 return function( addr, port, listener, pattern, sslctx, startssl ) -- TODO: check arguments
715 --vdebug( "creating new tcp server with following parameters:", addr or "nil", port or "nil", sslctx or "nil", startssl or "nil")
716 if sslctx and not has_luasec then
717 debug "fatal error: luasec not found"
718 return nil, "luasec not found"
720 local server, err = socket.bind( addr, port, cfg.ACCEPT_QUEUE ) -- create server socket
722 debug( "creating server socket on "..addr.." port "..port.." failed:", err )
725 local interface = handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- new server handler
726 debug( "new server created with id:", tostring(interface))
731 local addclient, wrapclient
733 function wrapclient( client, ip, port, listeners, pattern, sslctx )
734 local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx )
735 interface:_start_connection(sslctx)
736 return interface, client
737 --function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface
740 function addclient( addr, serverport, listener, pattern, sslctx, typ )
741 if sslctx and not has_luasec then
742 debug "need luasec, but not available"
743 return nil, "luasec not found"
745 if getaddrinfo and not typ then
746 local addrinfo, err = getaddrinfo(addr)
747 if not addrinfo then return nil, err end
748 if addrinfo[1] and addrinfo[1].family == "inet6" then
752 local create = socket[typ or "tcp"]
753 if type( create ) ~= "function" then
754 return nil, "invalid socket type"
756 local client, err = create() -- creating new socket
758 debug( "cannot create socket:", err )
761 client:settimeout( 0 ) -- set nonblocking
762 local res, err = client:connect( addr, serverport ) -- connect
763 if res or ( err == "timeout" ) then
764 if client.getsockname then
765 addr = client:getsockname( )
767 local interface = wrapclient( client, addr, serverport, listener, pattern, sslctx )
768 debug( "new connection id:", interface.id )
769 return interface, err
771 debug( "new connection failed:", err )
778 local loop = function( ) -- starts the event loop
783 local newevent = ( function( )
784 local add = base.addevent
785 return function( ... )
786 return add( base, ... )
790 local closeallservers = function( arg )
791 for _, item in ipairs( interfacelist( ) ) do
792 if item.type == "server" then
798 local function setquitting(yes)
806 local function get_backend()
807 return base:method();
810 -- We need to hold onto the events to stop them
811 -- being garbage-collected
812 local signal_events = {}; -- [signal_num] -> event object
813 local function hook_signal(signal_num, handler)
814 local function _handler(event)
815 local ret = handler();
816 if ret ~= false then -- Continue handling this signal?
817 return EV_SIGNAL; -- Yes
819 return -1; -- Close this event
821 signal_events[signal_num] = base:addevent(signal_num, EV_SIGNAL, _handler);
822 return signal_events[signal_num];
825 local function link(sender, receiver, buffersize)
828 function receiver:ondrain()
829 if sender_locked then
835 function sender:onincoming(data)
836 receiver:write(data);
837 if receiver.writebufferlen >= buffersize then
838 sender_locked = true;
853 addserver = addserver,
854 addclient = addclient,
855 wrapclient = wrapclient,
856 setquitting = setquitting,
857 closeall = closeallservers,
858 get_backend = get_backend,
859 hook_signal = hook_signal,
861 __NAME = SCRIPT_NAME,
862 __DATE = LAST_MODIFIED,
863 __AUTHOR = SCRIPT_AUTHOR,
864 __VERSION = SCRIPT_VERSION,