Software / code / prosody
Changeset
2093:abfa1cc3a42f
net.server: Rename to net.server_select
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Sat, 21 Nov 2009 02:36:35 +0000 |
| parents | 2092:28c0b313b610 |
| children | 2094:c69cb5c171e0 |
| files | net/server.lua net/server_select.lua |
| diffstat | 2 files changed, 914 insertions(+), 914 deletions(-) [+] |
line wrap: on
line diff
--- a/net/server.lua Fri Nov 20 23:24:41 2009 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,914 +0,0 @@ --- --- server.lua by blastbeat of the luadch project --- Re-used here under the MIT/X Consortium License --- --- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain --- - --- // wrapping luadch stuff // -- - -local use = function( what ) - return _G[ what ] -end -local clean = function( tbl ) - for i, k in pairs( tbl ) do - tbl[ i ] = nil - end -end - -local log, table_concat = require ("util.logger").init("socket"), table.concat; -local out_put = function (...) return log("debug", table_concat{...}); end -local out_error = function (...) return log("warn", table_concat{...}); end -local mem_free = collectgarbage - -----------------------------------// DECLARATION //-- - ---// constants //-- - -local STAT_UNIT = 1 -- byte - ---// lua functions //-- - -local type = use "type" -local pairs = use "pairs" -local ipairs = use "ipairs" -local tostring = use "tostring" -local collectgarbage = use "collectgarbage" - ---// lua libs //-- - -local os = use "os" -local table = use "table" -local string = use "string" -local coroutine = use "coroutine" - ---// lua lib methods //-- - -local os_time = os.time -local os_difftime = os.difftime -local table_concat = table.concat -local table_remove = table.remove -local string_len = string.len -local string_sub = string.sub -local coroutine_wrap = coroutine.wrap -local coroutine_yield = coroutine.yield - ---// extern libs //-- - -local luasec = select( 2, pcall( require, "ssl" ) ) -local luasocket = require "socket" - ---// extern lib methods //-- - -local ssl_wrap = ( luasec and luasec.wrap ) -local socket_bind = luasocket.bind -local socket_sleep = luasocket.sleep -local socket_select = luasocket.select -local ssl_newcontext = ( luasec and luasec.newcontext ) - ---// functions //-- - -local id -local loop -local stats -local idfalse -local addtimer -local closeall -local addserver -local getserver -local wrapserver -local getsettings -local closesocket -local removesocket -local removeserver -local changetimeout -local wrapconnection -local changesettings - ---// tables //-- - -local _server -local _readlist -local _timerlist -local _sendlist -local _socketlist -local _closelist -local _readtimes -local _writetimes - ---// simple data types //-- - -local _ -local _readlistlen -local _sendlistlen -local _timerlistlen - -local _sendtraffic -local _readtraffic - -local _selecttimeout -local _sleeptime - -local _starttime -local _currenttime - -local _maxsendlen -local _maxreadlen - -local _checkinterval -local _sendtimeout -local _readtimeout - -local _cleanqueue - -local _timer - -local _maxclientsperserver - -----------------------------------// DEFINITION //-- - -_server = { } -- key = port, value = table; list of listening servers -_readlist = { } -- array with sockets to read from -_sendlist = { } -- arrary with sockets to write to -_timerlist = { } -- array of timer functions -_socketlist = { } -- key = socket, value = wrapped socket (handlers) -_readtimes = { } -- key = handler, value = timestamp of last data reading -_writetimes = { } -- key = handler, value = timestamp of last data writing/sending -_closelist = { } -- handlers to close - -_readlistlen = 0 -- length of readlist -_sendlistlen = 0 -- length of sendlist -_timerlistlen = 0 -- lenght of timerlist - -_sendtraffic = 0 -- some stats -_readtraffic = 0 - -_selecttimeout = 1 -- timeout of socket.select -_sleeptime = 0 -- time to wait at the end of every loop - -_maxsendlen = 51000 * 1024 -- max len of send buffer -_maxreadlen = 25000 * 1024 -- max len of read buffer - -_checkinterval = 1200000 -- interval in secs to check idle clients -_sendtimeout = 60000 -- allowed send idle time in secs -_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs - -_cleanqueue = false -- clean bufferqueue after using - -_maxclientsperserver = 1000 - -_maxsslhandshake = 30 -- max handshake round-trips -----------------------------------// PRIVATE //-- - -wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server - - maxconnections = maxconnections or _maxclientsperserver - - local connections = 0 - - local dispatch, disconnect = listeners.incoming or listeners.listener, listeners.disconnect - - local err - - local ssl = false - - if sslctx then - ssl = true - if not ssl_newcontext then - out_error "luasec not found" - ssl = false - end - if type( sslctx ) ~= "table" then - out_error "server.lua: wrong server sslctx" - ssl = false - end - local ctx; - ctx, err = ssl_newcontext( sslctx ) - if not ctx then - err = err or "wrong sslctx parameters" - local file; - file = err:match("^error loading (.-) %("); - if file then - if file == "private key" then - file = sslctx.key or "your private key"; - elseif file == "certificate" then - file = sslctx.certificate or "your certificate file"; - end - local reason = err:match("%((.+)%)$") or "some reason"; - if reason == "Permission denied" then - reason = "Check that the permissions allow Prosody to read this file."; - elseif reason == "No such file or directory" then - reason = "Check that the path is correct, and the file exists."; - elseif reason == "system lib" then - reason = "Previous error (see logs), or other system error."; - else - reason = "Reason: "..tostring(reason or "unknown"):lower(); - end - log("error", "SSL/TLS: Failed to load %s: %s", file, reason); - else - log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err ); - end - ssl = false - end - sslctx = ctx; - end - if not ssl then - sslctx = false; - if startssl then - log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport ) - return nil, "Cannot start ssl, see log for details" - end - end - - local accept = socket.accept - - --// public methods of the object //-- - - local handler = { } - - handler.shutdown = function( ) end - - handler.ssl = function( ) - return ssl - end - handler.sslctx = function( ) - return sslctx - end - handler.remove = function( ) - connections = connections - 1 - end - handler.close = function( ) - for _, handler in pairs( _socketlist ) do - if handler.serverport == serverport then - handler.disconnect( handler, "server closed" ) - handler.close( true ) - end - end - socket:close( ) - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) - _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _socketlist[ socket ] = nil - handler = nil - socket = nil - --mem_free( ) - out_put "server.lua: closed server handler and removed sockets from list" - end - handler.ip = function( ) - return ip - end - handler.serverport = function( ) - return serverport - end - handler.socket = function( ) - return socket - end - handler.readbuffer = function( ) - if connections > maxconnections then - out_put( "server.lua: refused new client connection: server full" ) - return false - end - local client, err = accept( socket ) -- try to accept - if client then - local ip, clientport = client:getpeername( ) - client:settimeout( 0 ) - local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket - if err then -- error while wrapping ssl socket - return false - end - connections = connections + 1 - out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport)) - return dispatch( handler ) - elseif err then -- maybe timeout or something else - out_put( "server.lua: error with new client connection: ", tostring(err) ) - return false - end - end - return handler -end - -wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object - - socket:settimeout( 0 ) - - --// local import of socket methods //-- - - local send - local receive - local shutdown - - --// private closures of the object //-- - - local ssl - - local dispatch = listeners.incoming or listeners.listener - local status = listeners.status - local disconnect = listeners.disconnect - - local bufferqueue = { } -- buffer array - local bufferqueuelen = 0 -- end of buffer array - - local toclose - local fatalerror - local needtls - - local bufferlen = 0 - - local noread = false - local nosend = false - - local sendtraffic, readtraffic = 0, 0 - - local maxsendlen = _maxsendlen - local maxreadlen = _maxreadlen - - --// public methods of the object //-- - - local handler = bufferqueue -- saves a table ^_^ - - handler.dispatch = function( ) - return dispatch - end - handler.disconnect = function( ) - return disconnect - end - handler.setlistener = function( listeners ) - dispatch = listeners.incoming - disconnect = listeners.disconnect - end - handler.getstats = function( ) - return readtraffic, sendtraffic - end - handler.ssl = function( ) - return ssl - end - handler.sslctx = function ( ) - return sslctx - end - handler.send = function( _, data, i, j ) - return send( socket, data, i, j ) - end - handler.receive = function( pattern, prefix ) - return receive( socket, pattern, prefix ) - end - handler.shutdown = function( pattern ) - return shutdown( socket, pattern ) - end - handler.close = function( forced ) - if not handler then return true; end - _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _readtimes[ handler ] = nil - if bufferqueuelen ~= 0 then - if not ( forced or fatalerror ) then - handler.sendbuffer( ) - if bufferqueuelen ~= 0 then -- try again... - if handler then - handler.write = nil -- ... but no further writing allowed - end - toclose = true - return false - end - else - send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send - end - end - if socket then - _ = shutdown and shutdown( socket ) - socket:close( ) - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) - _socketlist[ socket ] = nil - socket = nil - else - out_put "server.lua: socket already closed" - end - if handler then - _writetimes[ handler ] = nil - _closelist[ handler ] = nil - handler = nil - end - if server then - server.remove( ) - end - out_put "server.lua: closed client handler and removed socket from list" - return true - end - handler.ip = function( ) - return ip - end - handler.serverport = function( ) - return serverport - end - handler.clientport = function( ) - return clientport - end - local write = function( data ) - bufferlen = bufferlen + string_len( data ) - if bufferlen > maxsendlen then - _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle - handler.write = idfalse -- dont write anymore - return false - elseif socket and not _sendlist[ socket ] then - _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) - end - bufferqueuelen = bufferqueuelen + 1 - bufferqueue[ bufferqueuelen ] = data - if handler then - _writetimes[ handler ] = _writetimes[ handler ] or _currenttime - end - return true - end - handler.write = write - handler.bufferqueue = function( ) - return bufferqueue - end - handler.socket = function( ) - return socket - end - handler.pattern = function( new ) - pattern = new or pattern - return pattern - end - handler.setsend = function ( newsend ) - send = newsend or send - return send - end - handler.bufferlen = function( readlen, sendlen ) - maxsendlen = sendlen or maxsendlen - maxreadlen = readlen or maxreadlen - return maxreadlen, maxsendlen - end - handler.lock = function( switch ) - if switch == true then - handler.write = idfalse - local tmp = _sendlistlen - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) - _writetimes[ handler ] = nil - if _sendlistlen ~= tmp then - nosend = true - end - tmp = _readlistlen - _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _readtimes[ handler ] = nil - if _readlistlen ~= tmp then - noread = true - end - elseif switch == false then - handler.write = write - if noread then - noread = false - _readlistlen = addsocket(_readlist, socket, _readlistlen) - _readtimes[ handler ] = _currenttime - end - if nosend then - nosend = false - write( "" ) - end - end - return noread, nosend - end - local _readbuffer = function( ) -- this function reads data - local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern" - if not err or ( err == "timeout" or err == "wantread" ) then -- received something - local buffer = buffer or part or "" - local len = string_len( buffer ) - if len > maxreadlen then - disconnect( handler, "receive buffer exceeded" ) - handler.close( true ) - return false - end - local count = len * STAT_UNIT - readtraffic = readtraffic + count - _readtraffic = _readtraffic + count - _readtimes[ handler ] = _currenttime - --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err ) - return dispatch( handler, buffer, err ) - else -- connections was closed or fatal error - out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) ) - fatalerror = true - disconnect( handler, err ) - _ = handler and handler.close( ) - return false - end - end - local _sendbuffer = function( ) -- this function sends data - local succ, err, byte, buffer, count; - local count; - if socket then - buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) - succ, err, byte = send( socket, buffer, 1, bufferlen ) - count = ( succ or byte or 0 ) * STAT_UNIT - sendtraffic = sendtraffic + count - _sendtraffic = _sendtraffic + count - _ = _cleanqueue and clean( bufferqueue ) - --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) ) - else - succ, err, count = false, "closed", 0; - end - if succ then -- sending succesful - bufferqueuelen = 0 - bufferlen = 0 - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist - _ = needtls and handler.starttls(true) - _writetimes[ handler ] = nil - _ = toclose and handler.close( ) - return true - elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write - buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer - bufferqueue[ 1 ] = buffer -- insert new buffer in queue - bufferqueuelen = 1 - bufferlen = bufferlen - byte - _writetimes[ handler ] = _currenttime - return true - else -- connection was closed during sending or fatal error - out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) ) - fatalerror = true - disconnect( handler, err ) - _ = handler and handler.close( ) - return false - end - end - - -- Set the sslctx - local handshake; - function handler.set_sslctx(new_sslctx) - ssl = true - sslctx = new_sslctx; - local wrote - local read - handshake = coroutine_wrap( function( client ) -- create handshake coroutine - local err - for i = 1, _maxsslhandshake do - _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen - _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen - read, wrote = nil, nil - _, err = client:dohandshake( ) - if not err then - out_put( "server.lua: ssl handshake done" ) - handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions - handler.sendbuffer = _sendbuffer - _ = status and status( handler, "ssl-handshake-complete" ) - _readlistlen = addsocket(_readlist, client, _readlistlen) - return true - else - out_put( "server.lua: error during ssl handshake: ", tostring(err) ) - if err == "wantwrite" and not wrote then - _sendlistlen = addsocket(_sendlist, client, _sendlistlen) - wrote = true - elseif err == "wantread" and not read then - _readlistlen = addsocket(_readlist, client, _readlistlen) - read = true - else - break; - end - --coroutine_yield( handler, nil, err ) -- handshake not finished - coroutine_yield( ) - end - end - disconnect( handler, "ssl handshake failed" ) - _ = handler and handler.close( true ) -- forced disconnect - return false -- handshake failed - end - ) - end - if sslctx then -- ssl? - handler.set_sslctx(sslctx); - if startssl then -- ssl now? - --out_put("server.lua: ", "starting ssl handshake") - local err - socket, err = ssl_wrap( socket, sslctx ) -- wrap socket - if err then - out_put( "server.lua: ssl error: ", tostring(err) ) - --mem_free( ) - return nil, nil, err -- fatal error - end - socket:settimeout( 0 ) - handler.readbuffer = handshake - handler.sendbuffer = handshake - handshake( socket ) -- do handshake - if not socket then - return nil, nil, "ssl handshake failed"; - end - else - -- We're not automatically doing SSL, so we're not secure (yet) - ssl = false - handler.starttls = function( now ) - if not now then - --out_put "server.lua: we need to do tls, but delaying until later" - needtls = true - return - end - --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) ) - local oldsocket, err = socket - socket, err = ssl_wrap( socket, sslctx ) -- wrap socket - --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) ) - if err then - out_put( "server.lua: error while starting tls on client: ", tostring(err) ) - return nil, err -- fatal error - end - - socket:settimeout( 0 ) - - -- add the new socket to our system - - send = socket.send - receive = socket.receive - shutdown = id - - _socketlist[ socket ] = handler - _readlistlen = addsocket(_readlist, socket, _readlistlen) - - -- remove traces of the old socket - - _readlistlen = removesocket( _readlist, oldsocket, _readlistlen ) - _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen ) - _socketlist[ oldsocket ] = nil - - handler.starttls = nil - needtls = nil - - -- Secure now - ssl = true - - handler.readbuffer = handshake - handler.sendbuffer = handshake - handshake( socket ) -- do handshake - end - handler.readbuffer = _readbuffer - handler.sendbuffer = _sendbuffer - end - else -- normal connection - ssl = false - handler.readbuffer = _readbuffer - handler.sendbuffer = _sendbuffer - end - - send = socket.send - receive = socket.receive - shutdown = ( ssl and id ) or socket.shutdown - - _socketlist[ socket ] = handler - _readlistlen = addsocket(_readlist, socket, _readlistlen) - - return handler, socket -end - -id = function( ) -end - -idfalse = function( ) - return false -end - -addsocket = function( list, socket, len ) - if not list[ socket ] then - len = len + 1 - list[ len ] = socket - list[ socket ] = len - end - return len; -end - -removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas ) - local pos = list[ socket ] - if pos then - list[ socket ] = nil - local last = list[ len ] - list[ len ] = nil - if last ~= socket then - list[ last ] = pos - list[ pos ] = last - end - return len - 1 - end - return len -end - -closesocket = function( socket ) - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) - _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _socketlist[ socket ] = nil - socket:close( ) - --mem_free( ) -end - -----------------------------------// PUBLIC //-- - -addserver = function( listeners, port, addr, pattern, sslctx, maxconnections, startssl ) -- this function provides a way for other scripts to reg a server - local err - --out_put("server.lua: autossl on ", port, " is ", startssl) - if type( listeners ) ~= "table" then - err = "invalid listener table" - end - if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then - err = "invalid port" - elseif _server[ port ] then - err = "listeners on port '" .. port .. "' already exist" - elseif sslctx and not luasec then - err = "luasec not found" - end - if err then - out_error( "server.lua, port ", port, ": ", err ) - return nil, err - end - addr = addr or "*" - local server, err = socket_bind( addr, port ) - if err then - out_error( "server.lua, port ", port, ": ", err ) - return nil, err - end - local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, maxconnections, startssl ) -- wrap new server socket - if not handler then - server:close( ) - return nil, err - end - server:settimeout( 0 ) - _readlistlen = addsocket(_readlist, server, _readlistlen) - _server[ port ] = handler - _socketlist[ server ] = handler - out_put( "server.lua: new server listener on '", addr, ":", port, "'" ) - return handler -end - -getserver = function ( port ) - return _server[ port ]; -end - -removeserver = function( port ) - local handler = _server[ port ] - if not handler then - return nil, "no server found on port '" .. tostring( port ) .. "'" - end - handler.close( ) - _server[ port ] = nil - return true -end - -closeall = function( ) - for _, handler in pairs( _socketlist ) do - handler.close( ) - _socketlist[ _ ] = nil - end - _readlistlen = 0 - _sendlistlen = 0 - _timerlistlen = 0 - _server = { } - _readlist = { } - _sendlist = { } - _timerlist = { } - _socketlist = { } - --mem_free( ) -end - -getsettings = function( ) - return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake -end - -changesettings = function( new ) - if type( new ) ~= "table" then - return nil, "invalid settings table" - end - _selecttimeout = tonumber( new.timeout ) or _selecttimeout - _sleeptime = tonumber( new.sleeptime ) or _sleeptime - _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen - _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen - _checkinterval = tonumber( new.checkinterval ) or _checkinterval - _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout - _readtimeout = tonumber( new.readtimeout ) or _readtimeout - _cleanqueue = new.cleanqueue - _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver - _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake - return true -end - -addtimer = function( listener ) - if type( listener ) ~= "function" then - return nil, "invalid listener function" - end - _timerlistlen = _timerlistlen + 1 - _timerlist[ _timerlistlen ] = listener - return true -end - -stats = function( ) - return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen -end - -local dontstop = true; -- thinking about tomorrow, ... - -setquitting = function (quit) - dontstop = not quit; - return; -end - -loop = function( ) -- this is the main loop of the program - while dontstop do - local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout ) - for i, socket in ipairs( write ) do -- send data waiting in writequeues - local handler = _socketlist[ socket ] - if handler then - handler.sendbuffer( ) - else - closesocket( socket ) - out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen - end - end - for i, socket in ipairs( read ) do -- receive data - local handler = _socketlist[ socket ] - if handler then - handler.readbuffer( ) - else - closesocket( socket ) - out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen - end - end - for handler, err in pairs( _closelist ) do - handler.disconnect( )( handler, err ) - handler.close( true ) -- forced disconnect - end - clean( _closelist ) - _currenttime = os_time( ) - if os_difftime( _currenttime - _timer ) >= 1 then - for i = 1, _timerlistlen do - _timerlist[ i ]( _currenttime ) -- fire timers - end - _timer = _currenttime - end - socket_sleep( _sleeptime ) -- wait some time - --collectgarbage( ) - end - return "quitting" -end - ---// EXPERIMENTAL //-- - -local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl ) - local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl ) - _socketlist[ socket ] = handler - _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) - return handler, socket -end - -local addclient = function( address, port, listeners, pattern, sslctx, startssl ) - local client, err = luasocket.tcp( ) - if err then - return nil, err - end - client:settimeout( 0 ) - _, err = client:connect( address, port ) - if err then -- try again - local handler = wrapclient( client, address, port, listeners ) - else - wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl ) - end -end - ---// EXPERIMENTAL //-- - -----------------------------------// BEGIN //-- - -use "setmetatable" ( _socketlist, { __mode = "k" } ) -use "setmetatable" ( _readtimes, { __mode = "k" } ) -use "setmetatable" ( _writetimes, { __mode = "k" } ) - -_timer = os_time( ) -_starttime = os_time( ) - -addtimer( function( ) - local difftime = os_difftime( _currenttime - _starttime ) - if difftime > _checkinterval then - _starttime = _currenttime - for handler, timestamp in pairs( _writetimes ) do - if os_difftime( _currenttime - timestamp ) > _sendtimeout then - --_writetimes[ handler ] = nil - handler.disconnect( )( handler, "send timeout" ) - handler.close( true ) -- forced disconnect - end - end - for handler, timestamp in pairs( _readtimes ) do - if os_difftime( _currenttime - timestamp ) > _readtimeout then - --_readtimes[ handler ] = nil - handler.disconnect( )( handler, "read timeout" ) - handler.close( ) -- forced disconnect? - end - end - end - end -) - -----------------------------------// PUBLIC INTERFACE //-- - -return { - - addclient = addclient, - wrapclient = wrapclient, - - loop = loop, - stats = stats, - closeall = closeall, - addtimer = addtimer, - addserver = addserver, - getserver = getserver, - getsettings = getsettings, - setquitting = setquitting, - removeserver = removeserver, - changesettings = changesettings, -}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/net/server_select.lua Sat Nov 21 02:36:35 2009 +0000 @@ -0,0 +1,914 @@ +-- +-- server.lua by blastbeat of the luadch project +-- Re-used here under the MIT/X Consortium License +-- +-- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain +-- + +-- // wrapping luadch stuff // -- + +local use = function( what ) + return _G[ what ] +end +local clean = function( tbl ) + for i, k in pairs( tbl ) do + tbl[ i ] = nil + end +end + +local log, table_concat = require ("util.logger").init("socket"), table.concat; +local out_put = function (...) return log("debug", table_concat{...}); end +local out_error = function (...) return log("warn", table_concat{...}); end +local mem_free = collectgarbage + +----------------------------------// DECLARATION //-- + +--// constants //-- + +local STAT_UNIT = 1 -- byte + +--// lua functions //-- + +local type = use "type" +local pairs = use "pairs" +local ipairs = use "ipairs" +local tostring = use "tostring" +local collectgarbage = use "collectgarbage" + +--// lua libs //-- + +local os = use "os" +local table = use "table" +local string = use "string" +local coroutine = use "coroutine" + +--// lua lib methods //-- + +local os_time = os.time +local os_difftime = os.difftime +local table_concat = table.concat +local table_remove = table.remove +local string_len = string.len +local string_sub = string.sub +local coroutine_wrap = coroutine.wrap +local coroutine_yield = coroutine.yield + +--// extern libs //-- + +local luasec = select( 2, pcall( require, "ssl" ) ) +local luasocket = require "socket" + +--// extern lib methods //-- + +local ssl_wrap = ( luasec and luasec.wrap ) +local socket_bind = luasocket.bind +local socket_sleep = luasocket.sleep +local socket_select = luasocket.select +local ssl_newcontext = ( luasec and luasec.newcontext ) + +--// functions //-- + +local id +local loop +local stats +local idfalse +local addtimer +local closeall +local addserver +local getserver +local wrapserver +local getsettings +local closesocket +local removesocket +local removeserver +local changetimeout +local wrapconnection +local changesettings + +--// tables //-- + +local _server +local _readlist +local _timerlist +local _sendlist +local _socketlist +local _closelist +local _readtimes +local _writetimes + +--// simple data types //-- + +local _ +local _readlistlen +local _sendlistlen +local _timerlistlen + +local _sendtraffic +local _readtraffic + +local _selecttimeout +local _sleeptime + +local _starttime +local _currenttime + +local _maxsendlen +local _maxreadlen + +local _checkinterval +local _sendtimeout +local _readtimeout + +local _cleanqueue + +local _timer + +local _maxclientsperserver + +----------------------------------// DEFINITION //-- + +_server = { } -- key = port, value = table; list of listening servers +_readlist = { } -- array with sockets to read from +_sendlist = { } -- arrary with sockets to write to +_timerlist = { } -- array of timer functions +_socketlist = { } -- key = socket, value = wrapped socket (handlers) +_readtimes = { } -- key = handler, value = timestamp of last data reading +_writetimes = { } -- key = handler, value = timestamp of last data writing/sending +_closelist = { } -- handlers to close + +_readlistlen = 0 -- length of readlist +_sendlistlen = 0 -- length of sendlist +_timerlistlen = 0 -- lenght of timerlist + +_sendtraffic = 0 -- some stats +_readtraffic = 0 + +_selecttimeout = 1 -- timeout of socket.select +_sleeptime = 0 -- time to wait at the end of every loop + +_maxsendlen = 51000 * 1024 -- max len of send buffer +_maxreadlen = 25000 * 1024 -- max len of read buffer + +_checkinterval = 1200000 -- interval in secs to check idle clients +_sendtimeout = 60000 -- allowed send idle time in secs +_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs + +_cleanqueue = false -- clean bufferqueue after using + +_maxclientsperserver = 1000 + +_maxsslhandshake = 30 -- max handshake round-trips +----------------------------------// PRIVATE //-- + +wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server + + maxconnections = maxconnections or _maxclientsperserver + + local connections = 0 + + local dispatch, disconnect = listeners.incoming or listeners.listener, listeners.disconnect + + local err + + local ssl = false + + if sslctx then + ssl = true + if not ssl_newcontext then + out_error "luasec not found" + ssl = false + end + if type( sslctx ) ~= "table" then + out_error "server.lua: wrong server sslctx" + ssl = false + end + local ctx; + ctx, err = ssl_newcontext( sslctx ) + if not ctx then + err = err or "wrong sslctx parameters" + local file; + file = err:match("^error loading (.-) %("); + if file then + if file == "private key" then + file = sslctx.key or "your private key"; + elseif file == "certificate" then + file = sslctx.certificate or "your certificate file"; + end + local reason = err:match("%((.+)%)$") or "some reason"; + if reason == "Permission denied" then + reason = "Check that the permissions allow Prosody to read this file."; + elseif reason == "No such file or directory" then + reason = "Check that the path is correct, and the file exists."; + elseif reason == "system lib" then + reason = "Previous error (see logs), or other system error."; + else + reason = "Reason: "..tostring(reason or "unknown"):lower(); + end + log("error", "SSL/TLS: Failed to load %s: %s", file, reason); + else + log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err ); + end + ssl = false + end + sslctx = ctx; + end + if not ssl then + sslctx = false; + if startssl then + log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport ) + return nil, "Cannot start ssl, see log for details" + end + end + + local accept = socket.accept + + --// public methods of the object //-- + + local handler = { } + + handler.shutdown = function( ) end + + handler.ssl = function( ) + return ssl + end + handler.sslctx = function( ) + return sslctx + end + handler.remove = function( ) + connections = connections - 1 + end + handler.close = function( ) + for _, handler in pairs( _socketlist ) do + if handler.serverport == serverport then + handler.disconnect( handler, "server closed" ) + handler.close( true ) + end + end + socket:close( ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _socketlist[ socket ] = nil + handler = nil + socket = nil + --mem_free( ) + out_put "server.lua: closed server handler and removed sockets from list" + end + handler.ip = function( ) + return ip + end + handler.serverport = function( ) + return serverport + end + handler.socket = function( ) + return socket + end + handler.readbuffer = function( ) + if connections > maxconnections then + out_put( "server.lua: refused new client connection: server full" ) + return false + end + local client, err = accept( socket ) -- try to accept + if client then + local ip, clientport = client:getpeername( ) + client:settimeout( 0 ) + local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket + if err then -- error while wrapping ssl socket + return false + end + connections = connections + 1 + out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport)) + return dispatch( handler ) + elseif err then -- maybe timeout or something else + out_put( "server.lua: error with new client connection: ", tostring(err) ) + return false + end + end + return handler +end + +wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object + + socket:settimeout( 0 ) + + --// local import of socket methods //-- + + local send + local receive + local shutdown + + --// private closures of the object //-- + + local ssl + + local dispatch = listeners.incoming or listeners.listener + local status = listeners.status + local disconnect = listeners.disconnect + + local bufferqueue = { } -- buffer array + local bufferqueuelen = 0 -- end of buffer array + + local toclose + local fatalerror + local needtls + + local bufferlen = 0 + + local noread = false + local nosend = false + + local sendtraffic, readtraffic = 0, 0 + + local maxsendlen = _maxsendlen + local maxreadlen = _maxreadlen + + --// public methods of the object //-- + + local handler = bufferqueue -- saves a table ^_^ + + handler.dispatch = function( ) + return dispatch + end + handler.disconnect = function( ) + return disconnect + end + handler.setlistener = function( listeners ) + dispatch = listeners.incoming + disconnect = listeners.disconnect + end + handler.getstats = function( ) + return readtraffic, sendtraffic + end + handler.ssl = function( ) + return ssl + end + handler.sslctx = function ( ) + return sslctx + end + handler.send = function( _, data, i, j ) + return send( socket, data, i, j ) + end + handler.receive = function( pattern, prefix ) + return receive( socket, pattern, prefix ) + end + handler.shutdown = function( pattern ) + return shutdown( socket, pattern ) + end + handler.close = function( forced ) + if not handler then return true; end + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _readtimes[ handler ] = nil + if bufferqueuelen ~= 0 then + if not ( forced or fatalerror ) then + handler.sendbuffer( ) + if bufferqueuelen ~= 0 then -- try again... + if handler then + handler.write = nil -- ... but no further writing allowed + end + toclose = true + return false + end + else + send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send + end + end + if socket then + _ = shutdown and shutdown( socket ) + socket:close( ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _socketlist[ socket ] = nil + socket = nil + else + out_put "server.lua: socket already closed" + end + if handler then + _writetimes[ handler ] = nil + _closelist[ handler ] = nil + handler = nil + end + if server then + server.remove( ) + end + out_put "server.lua: closed client handler and removed socket from list" + return true + end + handler.ip = function( ) + return ip + end + handler.serverport = function( ) + return serverport + end + handler.clientport = function( ) + return clientport + end + local write = function( data ) + bufferlen = bufferlen + string_len( data ) + if bufferlen > maxsendlen then + _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle + handler.write = idfalse -- dont write anymore + return false + elseif socket and not _sendlist[ socket ] then + _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) + end + bufferqueuelen = bufferqueuelen + 1 + bufferqueue[ bufferqueuelen ] = data + if handler then + _writetimes[ handler ] = _writetimes[ handler ] or _currenttime + end + return true + end + handler.write = write + handler.bufferqueue = function( ) + return bufferqueue + end + handler.socket = function( ) + return socket + end + handler.pattern = function( new ) + pattern = new or pattern + return pattern + end + handler.setsend = function ( newsend ) + send = newsend or send + return send + end + handler.bufferlen = function( readlen, sendlen ) + maxsendlen = sendlen or maxsendlen + maxreadlen = readlen or maxreadlen + return maxreadlen, maxsendlen + end + handler.lock = function( switch ) + if switch == true then + handler.write = idfalse + local tmp = _sendlistlen + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _writetimes[ handler ] = nil + if _sendlistlen ~= tmp then + nosend = true + end + tmp = _readlistlen + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _readtimes[ handler ] = nil + if _readlistlen ~= tmp then + noread = true + end + elseif switch == false then + handler.write = write + if noread then + noread = false + _readlistlen = addsocket(_readlist, socket, _readlistlen) + _readtimes[ handler ] = _currenttime + end + if nosend then + nosend = false + write( "" ) + end + end + return noread, nosend + end + local _readbuffer = function( ) -- this function reads data + local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern" + if not err or ( err == "timeout" or err == "wantread" ) then -- received something + local buffer = buffer or part or "" + local len = string_len( buffer ) + if len > maxreadlen then + disconnect( handler, "receive buffer exceeded" ) + handler.close( true ) + return false + end + local count = len * STAT_UNIT + readtraffic = readtraffic + count + _readtraffic = _readtraffic + count + _readtimes[ handler ] = _currenttime + --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err ) + return dispatch( handler, buffer, err ) + else -- connections was closed or fatal error + out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) ) + fatalerror = true + disconnect( handler, err ) + _ = handler and handler.close( ) + return false + end + end + local _sendbuffer = function( ) -- this function sends data + local succ, err, byte, buffer, count; + local count; + if socket then + buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) + succ, err, byte = send( socket, buffer, 1, bufferlen ) + count = ( succ or byte or 0 ) * STAT_UNIT + sendtraffic = sendtraffic + count + _sendtraffic = _sendtraffic + count + _ = _cleanqueue and clean( bufferqueue ) + --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) ) + else + succ, err, count = false, "closed", 0; + end + if succ then -- sending succesful + bufferqueuelen = 0 + bufferlen = 0 + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist + _ = needtls and handler.starttls(true) + _writetimes[ handler ] = nil + _ = toclose and handler.close( ) + return true + elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write + buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer + bufferqueue[ 1 ] = buffer -- insert new buffer in queue + bufferqueuelen = 1 + bufferlen = bufferlen - byte + _writetimes[ handler ] = _currenttime + return true + else -- connection was closed during sending or fatal error + out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) ) + fatalerror = true + disconnect( handler, err ) + _ = handler and handler.close( ) + return false + end + end + + -- Set the sslctx + local handshake; + function handler.set_sslctx(new_sslctx) + ssl = true + sslctx = new_sslctx; + local wrote + local read + handshake = coroutine_wrap( function( client ) -- create handshake coroutine + local err + for i = 1, _maxsslhandshake do + _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen + _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen + read, wrote = nil, nil + _, err = client:dohandshake( ) + if not err then + out_put( "server.lua: ssl handshake done" ) + handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions + handler.sendbuffer = _sendbuffer + _ = status and status( handler, "ssl-handshake-complete" ) + _readlistlen = addsocket(_readlist, client, _readlistlen) + return true + else + out_put( "server.lua: error during ssl handshake: ", tostring(err) ) + if err == "wantwrite" and not wrote then + _sendlistlen = addsocket(_sendlist, client, _sendlistlen) + wrote = true + elseif err == "wantread" and not read then + _readlistlen = addsocket(_readlist, client, _readlistlen) + read = true + else + break; + end + --coroutine_yield( handler, nil, err ) -- handshake not finished + coroutine_yield( ) + end + end + disconnect( handler, "ssl handshake failed" ) + _ = handler and handler.close( true ) -- forced disconnect + return false -- handshake failed + end + ) + end + if sslctx then -- ssl? + handler.set_sslctx(sslctx); + if startssl then -- ssl now? + --out_put("server.lua: ", "starting ssl handshake") + local err + socket, err = ssl_wrap( socket, sslctx ) -- wrap socket + if err then + out_put( "server.lua: ssl error: ", tostring(err) ) + --mem_free( ) + return nil, nil, err -- fatal error + end + socket:settimeout( 0 ) + handler.readbuffer = handshake + handler.sendbuffer = handshake + handshake( socket ) -- do handshake + if not socket then + return nil, nil, "ssl handshake failed"; + end + else + -- We're not automatically doing SSL, so we're not secure (yet) + ssl = false + handler.starttls = function( now ) + if not now then + --out_put "server.lua: we need to do tls, but delaying until later" + needtls = true + return + end + --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) ) + local oldsocket, err = socket + socket, err = ssl_wrap( socket, sslctx ) -- wrap socket + --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) ) + if err then + out_put( "server.lua: error while starting tls on client: ", tostring(err) ) + return nil, err -- fatal error + end + + socket:settimeout( 0 ) + + -- add the new socket to our system + + send = socket.send + receive = socket.receive + shutdown = id + + _socketlist[ socket ] = handler + _readlistlen = addsocket(_readlist, socket, _readlistlen) + + -- remove traces of the old socket + + _readlistlen = removesocket( _readlist, oldsocket, _readlistlen ) + _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen ) + _socketlist[ oldsocket ] = nil + + handler.starttls = nil + needtls = nil + + -- Secure now + ssl = true + + handler.readbuffer = handshake + handler.sendbuffer = handshake + handshake( socket ) -- do handshake + end + handler.readbuffer = _readbuffer + handler.sendbuffer = _sendbuffer + end + else -- normal connection + ssl = false + handler.readbuffer = _readbuffer + handler.sendbuffer = _sendbuffer + end + + send = socket.send + receive = socket.receive + shutdown = ( ssl and id ) or socket.shutdown + + _socketlist[ socket ] = handler + _readlistlen = addsocket(_readlist, socket, _readlistlen) + + return handler, socket +end + +id = function( ) +end + +idfalse = function( ) + return false +end + +addsocket = function( list, socket, len ) + if not list[ socket ] then + len = len + 1 + list[ len ] = socket + list[ socket ] = len + end + return len; +end + +removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas ) + local pos = list[ socket ] + if pos then + list[ socket ] = nil + local last = list[ len ] + list[ len ] = nil + if last ~= socket then + list[ last ] = pos + list[ pos ] = last + end + return len - 1 + end + return len +end + +closesocket = function( socket ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _socketlist[ socket ] = nil + socket:close( ) + --mem_free( ) +end + +----------------------------------// PUBLIC //-- + +addserver = function( listeners, port, addr, pattern, sslctx, maxconnections, startssl ) -- this function provides a way for other scripts to reg a server + local err + --out_put("server.lua: autossl on ", port, " is ", startssl) + if type( listeners ) ~= "table" then + err = "invalid listener table" + end + if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then + err = "invalid port" + elseif _server[ port ] then + err = "listeners on port '" .. port .. "' already exist" + elseif sslctx and not luasec then + err = "luasec not found" + end + if err then + out_error( "server.lua, port ", port, ": ", err ) + return nil, err + end + addr = addr or "*" + local server, err = socket_bind( addr, port ) + if err then + out_error( "server.lua, port ", port, ": ", err ) + return nil, err + end + local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, maxconnections, startssl ) -- wrap new server socket + if not handler then + server:close( ) + return nil, err + end + server:settimeout( 0 ) + _readlistlen = addsocket(_readlist, server, _readlistlen) + _server[ port ] = handler + _socketlist[ server ] = handler + out_put( "server.lua: new server listener on '", addr, ":", port, "'" ) + return handler +end + +getserver = function ( port ) + return _server[ port ]; +end + +removeserver = function( port ) + local handler = _server[ port ] + if not handler then + return nil, "no server found on port '" .. tostring( port ) .. "'" + end + handler.close( ) + _server[ port ] = nil + return true +end + +closeall = function( ) + for _, handler in pairs( _socketlist ) do + handler.close( ) + _socketlist[ _ ] = nil + end + _readlistlen = 0 + _sendlistlen = 0 + _timerlistlen = 0 + _server = { } + _readlist = { } + _sendlist = { } + _timerlist = { } + _socketlist = { } + --mem_free( ) +end + +getsettings = function( ) + return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake +end + +changesettings = function( new ) + if type( new ) ~= "table" then + return nil, "invalid settings table" + end + _selecttimeout = tonumber( new.timeout ) or _selecttimeout + _sleeptime = tonumber( new.sleeptime ) or _sleeptime + _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen + _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen + _checkinterval = tonumber( new.checkinterval ) or _checkinterval + _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout + _readtimeout = tonumber( new.readtimeout ) or _readtimeout + _cleanqueue = new.cleanqueue + _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver + _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake + return true +end + +addtimer = function( listener ) + if type( listener ) ~= "function" then + return nil, "invalid listener function" + end + _timerlistlen = _timerlistlen + 1 + _timerlist[ _timerlistlen ] = listener + return true +end + +stats = function( ) + return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen +end + +local dontstop = true; -- thinking about tomorrow, ... + +setquitting = function (quit) + dontstop = not quit; + return; +end + +loop = function( ) -- this is the main loop of the program + while dontstop do + local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout ) + for i, socket in ipairs( write ) do -- send data waiting in writequeues + local handler = _socketlist[ socket ] + if handler then + handler.sendbuffer( ) + else + closesocket( socket ) + out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen + end + end + for i, socket in ipairs( read ) do -- receive data + local handler = _socketlist[ socket ] + if handler then + handler.readbuffer( ) + else + closesocket( socket ) + out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen + end + end + for handler, err in pairs( _closelist ) do + handler.disconnect( )( handler, err ) + handler.close( true ) -- forced disconnect + end + clean( _closelist ) + _currenttime = os_time( ) + if os_difftime( _currenttime - _timer ) >= 1 then + for i = 1, _timerlistlen do + _timerlist[ i ]( _currenttime ) -- fire timers + end + _timer = _currenttime + end + socket_sleep( _sleeptime ) -- wait some time + --collectgarbage( ) + end + return "quitting" +end + +--// EXPERIMENTAL //-- + +local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl ) + local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl ) + _socketlist[ socket ] = handler + _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) + return handler, socket +end + +local addclient = function( address, port, listeners, pattern, sslctx, startssl ) + local client, err = luasocket.tcp( ) + if err then + return nil, err + end + client:settimeout( 0 ) + _, err = client:connect( address, port ) + if err then -- try again + local handler = wrapclient( client, address, port, listeners ) + else + wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl ) + end +end + +--// EXPERIMENTAL //-- + +----------------------------------// BEGIN //-- + +use "setmetatable" ( _socketlist, { __mode = "k" } ) +use "setmetatable" ( _readtimes, { __mode = "k" } ) +use "setmetatable" ( _writetimes, { __mode = "k" } ) + +_timer = os_time( ) +_starttime = os_time( ) + +addtimer( function( ) + local difftime = os_difftime( _currenttime - _starttime ) + if difftime > _checkinterval then + _starttime = _currenttime + for handler, timestamp in pairs( _writetimes ) do + if os_difftime( _currenttime - timestamp ) > _sendtimeout then + --_writetimes[ handler ] = nil + handler.disconnect( )( handler, "send timeout" ) + handler.close( true ) -- forced disconnect + end + end + for handler, timestamp in pairs( _readtimes ) do + if os_difftime( _currenttime - timestamp ) > _readtimeout then + --_readtimes[ handler ] = nil + handler.disconnect( )( handler, "read timeout" ) + handler.close( ) -- forced disconnect? + end + end + end + end +) + +----------------------------------// PUBLIC INTERFACE //-- + +return { + + addclient = addclient, + wrapclient = wrapclient, + + loop = loop, + stats = stats, + closeall = closeall, + addtimer = addtimer, + addserver = addserver, + getserver = getserver, + getsettings = getsettings, + setquitting = setquitting, + removeserver = removeserver, + changesettings = changesettings, +}
