--- \r
--- server.lua by blastbeat of the luadch project\r
--- Re-used here under the MIT/X Consortium License\r
--- \r
--- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain\r
---\r
-\r
--- // wrapping luadch stuff // --\r
-\r
-local use = function( what )\r
- return _G[ what ]\r
-end\r
-local clean = function( tbl )\r
- for i, k in pairs( tbl ) do\r
- tbl[ i ] = nil\r
- end\r
-end\r
-\r
-local log, table_concat = require ("util.logger").init("socket"), table.concat;\r
-local out_put = function (...) return log("debug", table_concat{...}); end\r
-local out_error = function (...) return log("warn", table_concat{...}); end\r
-local mem_free = collectgarbage\r
-\r
-----------------------------------// DECLARATION //--\r
-\r
---// constants //--\r
-\r
-local STAT_UNIT = 1 -- byte\r
-\r
---// lua functions //--\r
-\r
-local type = use "type"\r
-local pairs = use "pairs"\r
-local ipairs = use "ipairs"\r
-local tostring = use "tostring"\r
-local collectgarbage = use "collectgarbage"\r
-\r
---// lua libs //--\r
-\r
-local os = use "os"\r
-local table = use "table"\r
-local string = use "string"\r
-local coroutine = use "coroutine"\r
-\r
---// lua lib methods //--\r
-\r
-local os_time = os.time\r
-local os_difftime = os.difftime\r
-local table_concat = table.concat\r
-local table_remove = table.remove\r
-local string_len = string.len\r
-local string_sub = string.sub\r
-local coroutine_wrap = coroutine.wrap\r
-local coroutine_yield = coroutine.yield\r
-\r
---// extern libs //--\r
-\r
-local luasec = select( 2, pcall( require, "ssl" ) )\r
-local luasocket = require "socket"\r
-\r
---// extern lib methods //--\r
-\r
-local ssl_wrap = ( luasec and luasec.wrap )\r
-local socket_bind = luasocket.bind\r
-local socket_sleep = luasocket.sleep\r
-local socket_select = luasocket.select\r
-local ssl_newcontext = ( luasec and luasec.newcontext )\r
-\r
---// functions //--\r
-\r
-local id\r
-local loop\r
-local stats\r
-local idfalse\r
-local addtimer\r
-local closeall\r
-local addserver\r
-local getserver\r
-local wrapserver\r
-local getsettings\r
-local closesocket\r
-local removesocket\r
-local removeserver\r
-local changetimeout\r
-local wrapconnection\r
-local changesettings\r
-\r
---// tables //--\r
-\r
-local _server\r
-local _readlist\r
-local _timerlist\r
-local _sendlist\r
-local _socketlist\r
-local _closelist\r
-local _readtimes\r
-local _writetimes\r
-\r
---// simple data types //--\r
-\r
-local _\r
-local _readlistlen\r
-local _sendlistlen\r
-local _timerlistlen\r
-\r
-local _sendtraffic\r
-local _readtraffic\r
-\r
-local _selecttimeout\r
-local _sleeptime\r
-\r
-local _starttime\r
-local _currenttime\r
-\r
-local _maxsendlen\r
-local _maxreadlen\r
-\r
-local _checkinterval\r
-local _sendtimeout\r
-local _readtimeout\r
-\r
-local _cleanqueue\r
-\r
-local _timer\r
-\r
-local _maxclientsperserver\r
-\r
-----------------------------------// DEFINITION //--\r
-\r
-_server = { } -- key = port, value = table; list of listening servers\r
-_readlist = { } -- array with sockets to read from\r
-_sendlist = { } -- arrary with sockets to write to\r
-_timerlist = { } -- array of timer functions\r
-_socketlist = { } -- key = socket, value = wrapped socket (handlers)\r
-_readtimes = { } -- key = handler, value = timestamp of last data reading\r
-_writetimes = { } -- key = handler, value = timestamp of last data writing/sending\r
-_closelist = { } -- handlers to close\r
-\r
-_readlistlen = 0 -- length of readlist\r
-_sendlistlen = 0 -- length of sendlist\r
-_timerlistlen = 0 -- lenght of timerlist\r
-\r
-_sendtraffic = 0 -- some stats\r
-_readtraffic = 0\r
-\r
-_selecttimeout = 1 -- timeout of socket.select\r
-_sleeptime = 0 -- time to wait at the end of every loop\r
-\r
-_maxsendlen = 51000 * 1024 -- max len of send buffer\r
-_maxreadlen = 25000 * 1024 -- max len of read buffer\r
-\r
-_checkinterval = 1200000 -- interval in secs to check idle clients\r
-_sendtimeout = 60000 -- allowed send idle time in secs\r
-_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs\r
-\r
-_cleanqueue = false -- clean bufferqueue after using\r
-\r
-_maxclientsperserver = 1000\r
-\r
-_maxsslhandshake = 30 -- max handshake round-trips\r
-----------------------------------// PRIVATE //--\r
-\r
-wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server\r
-\r
- maxconnections = maxconnections or _maxclientsperserver\r
-\r
- local connections = 0\r
-\r
- local dispatch, disconnect = listeners.onincoming, listeners.ondisconnect\r
-\r
- local err\r
-\r
- local ssl = false\r
-\r
- if sslctx then\r
- ssl = true\r
- if not ssl_newcontext then\r
- out_error "luasec not found"\r
- ssl = false\r
- end\r
- if type( sslctx ) ~= "table" then\r
- out_error "server.lua: wrong server sslctx"\r
- ssl = false\r
- end\r
- local ctx;\r
- ctx, err = ssl_newcontext( sslctx )\r
- if not ctx then\r
- err = err or "wrong sslctx parameters"\r
- local file;\r
- file = err:match("^error loading (.-) %(");\r
- if file then\r
- if file == "private key" then\r
- file = sslctx.key or "your private key";\r
- elseif file == "certificate" then\r
- file = sslctx.certificate or "your certificate file";\r
- end\r
- local reason = err:match("%((.+)%)$") or "some reason";\r
- if reason == "Permission denied" then\r
- reason = "Check that the permissions allow Prosody to read this file.";\r
- elseif reason == "No such file or directory" then\r
- reason = "Check that the path is correct, and the file exists.";\r
- elseif reason == "system lib" then\r
- reason = "Previous error (see logs), or other system error.";\r
- else\r
- reason = "Reason: "..tostring(reason or "unknown"):lower();\r
- end\r
- log("error", "SSL/TLS: Failed to load %s: %s", file, reason);\r
- else\r
- log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err );\r
- end\r
- ssl = false\r
- end\r
- sslctx = ctx;\r
- end\r
- if not ssl then\r
- sslctx = false;\r
- if startssl then\r
- log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport )\r
- return nil, "Cannot start ssl, see log for details"\r
- end\r
- end\r
-\r
- local accept = socket.accept\r
-\r
- --// public methods of the object //--\r
-\r
- local handler = { }\r
-\r
- handler.shutdown = function( ) end\r
-\r
- handler.ssl = function( )\r
- return ssl\r
- end\r
- handler.sslctx = function( )\r
- return sslctx\r
- end\r
- handler.remove = function( )\r
- connections = connections - 1\r
- end\r
- handler.close = function( )\r
- for _, handler in pairs( _socketlist ) do\r
- if handler.serverport == serverport then\r
- handler.disconnect( handler, "server closed" )\r
- handler:close( true )\r
- end\r
- end\r
- socket:close( )\r
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )\r
- _readlistlen = removesocket( _readlist, socket, _readlistlen )\r
- _socketlist[ socket ] = nil\r
- handler = nil\r
- socket = nil\r
- --mem_free( )\r
- out_put "server.lua: closed server handler and removed sockets from list"\r
- end\r
- handler.ip = function( )\r
- return ip\r
- end\r
- handler.serverport = function( )\r
- return serverport\r
- end\r
- handler.socket = function( )\r
- return socket\r
- end\r
- handler.readbuffer = function( )\r
- if connections > maxconnections then\r
- out_put( "server.lua: refused new client connection: server full" )\r
- return false\r
- end\r
- local client, err = accept( socket ) -- try to accept\r
- if client then\r
- local ip, clientport = client:getpeername( )\r
- client:settimeout( 0 )\r
- local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket\r
- if err then -- error while wrapping ssl socket\r
- return false\r
- end\r
- connections = connections + 1\r
- out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))\r
- return dispatch( handler )\r
- elseif err then -- maybe timeout or something else\r
- out_put( "server.lua: error with new client connection: ", tostring(err) )\r
- return false\r
- end\r
- end\r
- return handler\r
-end\r
-\r
-wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object\r
-\r
- socket:settimeout( 0 )\r
-\r
- --// local import of socket methods //--\r
-\r
- local send\r
- local receive\r
- local shutdown\r
-\r
- --// private closures of the object //--\r
-\r
- local ssl\r
-\r
- local dispatch = listeners.onincoming\r
- local status = listeners.status\r
- local disconnect = listeners.ondisconnect\r
-\r
- local bufferqueue = { } -- buffer array\r
- local bufferqueuelen = 0 -- end of buffer array\r
-\r
- local toclose\r
- local fatalerror\r
- local needtls\r
-\r
- local bufferlen = 0\r
-\r
- local noread = false\r
- local nosend = false\r
-\r
- local sendtraffic, readtraffic = 0, 0\r
-\r
- local maxsendlen = _maxsendlen\r
- local maxreadlen = _maxreadlen\r
-\r
- --// public methods of the object //--\r
-\r
- local handler = bufferqueue -- saves a table ^_^\r
-\r
- handler.dispatch = function( )\r
- return dispatch\r
- end\r
- handler.disconnect = function( )\r
- return disconnect\r
- end\r
- handler.setlistener = function( self, listeners )\r
- dispatch = listeners.onincoming\r
- disconnect = listeners.ondisconnect\r
- end\r
- handler.getstats = function( )\r
- return readtraffic, sendtraffic\r
- end\r
- handler.ssl = function( )\r
- return ssl\r
- end\r
- handler.sslctx = function ( )\r
- return sslctx\r
- end\r
- handler.send = function( _, data, i, j )\r
- return send( socket, data, i, j )\r
- end\r
- handler.receive = function( pattern, prefix )\r
- return receive( socket, pattern, prefix )\r
- end\r
- handler.shutdown = function( pattern )\r
- return shutdown( socket, pattern )\r
- end\r
- handler.close = function( self, forced )\r
- if not handler then return true; end\r
- _readlistlen = removesocket( _readlist, socket, _readlistlen )\r
- _readtimes[ handler ] = nil\r
- if bufferqueuelen ~= 0 then\r
- if not ( forced or fatalerror ) then\r
- handler.sendbuffer( )\r
- if bufferqueuelen ~= 0 then -- try again...\r
- if handler then\r
- handler.write = nil -- ... but no further writing allowed\r
- end\r
- toclose = true\r
- return false\r
- end\r
- else\r
- send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send\r
- end\r
- end\r
- if socket then\r
- _ = shutdown and shutdown( socket )\r
- socket:close( )\r
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )\r
- _socketlist[ socket ] = nil\r
- socket = nil\r
- else\r
- out_put "server.lua: socket already closed"\r
- end\r
- if handler then\r
- _writetimes[ handler ] = nil\r
- _closelist[ handler ] = nil\r
- handler = nil\r
- end\r
- if server then\r
- server.remove( )\r
- end\r
- out_put "server.lua: closed client handler and removed socket from list"\r
- return true\r
- end\r
- handler.ip = function( )\r
- return ip\r
- end\r
- handler.serverport = function( )\r
- return serverport\r
- end\r
- handler.clientport = function( )\r
- return clientport\r
- end\r
- local write = function( self, data )\r
- bufferlen = bufferlen + string_len( data )\r
- if bufferlen > maxsendlen then\r
- _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle\r
- handler.write = idfalse -- dont write anymore\r
- return false\r
- elseif socket and not _sendlist[ socket ] then\r
- _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)\r
- end\r
- bufferqueuelen = bufferqueuelen + 1\r
- bufferqueue[ bufferqueuelen ] = data\r
- if handler then\r
- _writetimes[ handler ] = _writetimes[ handler ] or _currenttime\r
- end\r
- return true\r
- end\r
- handler.write = write\r
- handler.bufferqueue = function( self )\r
- return bufferqueue\r
- end\r
- handler.socket = function( self )\r
- return socket\r
- end\r
- handler.pattern = function( self, new )\r
- pattern = new or pattern\r
- return pattern\r
- end\r
- handler.set_send = function ( self, newsend )\r
- send = newsend or send\r
- return send\r
- end\r
- handler.bufferlen = function( self, readlen, sendlen )\r
- maxsendlen = sendlen or maxsendlen\r
- maxreadlen = readlen or maxreadlen\r
- return bufferlen, maxreadlen, maxsendlen\r
- end\r
- handler.lock = function( self, switch )\r
- if switch == true then\r
- handler.write = idfalse\r
- local tmp = _sendlistlen\r
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )\r
- _writetimes[ handler ] = nil\r
- if _sendlistlen ~= tmp then\r
- nosend = true\r
- end\r
- tmp = _readlistlen\r
- _readlistlen = removesocket( _readlist, socket, _readlistlen )\r
- _readtimes[ handler ] = nil\r
- if _readlistlen ~= tmp then\r
- noread = true\r
- end\r
- elseif switch == false then\r
- handler.write = write\r
- if noread then\r
- noread = false\r
- _readlistlen = addsocket(_readlist, socket, _readlistlen)\r
- _readtimes[ handler ] = _currenttime\r
- end\r
- if nosend then\r
- nosend = false\r
- write( "" )\r
- end\r
- end\r
- return noread, nosend\r
- end\r
- local _readbuffer = function( ) -- this function reads data\r
- local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern"\r
- if not err or string_len(part) > 0 then -- received something\r
- local buffer = buffer or part or ""\r
- local len = string_len( buffer )\r
- if len > maxreadlen then\r
- disconnect( handler, "receive buffer exceeded" )\r
- handler.close( true )\r
- return false\r
- end\r
- local count = len * STAT_UNIT\r
- readtraffic = readtraffic + count\r
- _readtraffic = _readtraffic + count\r
- _readtimes[ handler ] = _currenttime\r
- --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )\r
- return dispatch( handler, buffer, err )\r
- else -- connections was closed or fatal error\r
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )\r
- fatalerror = true\r
- disconnect( handler, err )\r
- _ = handler and handler.close( )\r
- return false\r
- end\r
- end\r
- local _sendbuffer = function( ) -- this function sends data\r
- local succ, err, byte, buffer, count;\r
- local count;\r
- if socket then\r
- buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )\r
- succ, err, byte = send( socket, buffer, 1, bufferlen )\r
- count = ( succ or byte or 0 ) * STAT_UNIT\r
- sendtraffic = sendtraffic + count\r
- _sendtraffic = _sendtraffic + count\r
- _ = _cleanqueue and clean( bufferqueue )\r
- --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )\r
- else\r
- succ, err, count = false, "closed", 0;\r
- end\r
- if succ then -- sending succesful\r
- bufferqueuelen = 0\r
- bufferlen = 0\r
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist\r
- _ = needtls and handler:starttls(true)\r
- _writetimes[ handler ] = nil\r
- _ = toclose and handler.close( )\r
- return true\r
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write\r
- buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer\r
- bufferqueue[ 1 ] = buffer -- insert new buffer in queue\r
- bufferqueuelen = 1\r
- bufferlen = bufferlen - byte\r
- _writetimes[ handler ] = _currenttime\r
- return true\r
- else -- connection was closed during sending or fatal error\r
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )\r
- fatalerror = true\r
- disconnect( handler, err )\r
- _ = handler and handler.close( )\r
- return false\r
- end\r
- end\r
-\r
- -- Set the sslctx\r
- local handshake;\r
- function handler.set_sslctx(self, new_sslctx)\r
- ssl = true\r
- sslctx = new_sslctx;\r
- local wrote\r
- local read\r
- handshake = coroutine_wrap( function( client ) -- create handshake coroutine\r
- local err\r
- for i = 1, _maxsslhandshake do\r
- _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen\r
- _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen\r
- read, wrote = nil, nil\r
- _, err = client:dohandshake( )\r
- if not err then\r
- out_put( "server.lua: ssl handshake done" )\r
- handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions\r
- handler.sendbuffer = _sendbuffer\r
- _ = status and status( handler, "ssl-handshake-complete" )\r
- _readlistlen = addsocket(_readlist, client, _readlistlen)\r
- return true\r
- else\r
- out_put( "server.lua: error during ssl handshake: ", tostring(err) )\r
- if err == "wantwrite" and not wrote then\r
- _sendlistlen = addsocket(_sendlist, client, _sendlistlen)\r
- wrote = true\r
- elseif err == "wantread" and not read then\r
- _readlistlen = addsocket(_readlist, client, _readlistlen)\r
- read = true\r
- else\r
- break;\r
- end\r
- --coroutine_yield( handler, nil, err ) -- handshake not finished\r
- coroutine_yield( )\r
- end\r
- end\r
- disconnect( handler, "ssl handshake failed" )\r
- _ = handler and handler:close( true ) -- forced disconnect\r
- return false -- handshake failed\r
- end\r
- )\r
- end\r
- if sslctx then -- ssl?\r
- handler:set_sslctx(sslctx);\r
- if startssl then -- ssl now?\r
- --out_put("server.lua: ", "starting ssl handshake")\r
- local err\r
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket\r
- if err then\r
- out_put( "server.lua: ssl error: ", tostring(err) )\r
- --mem_free( )\r
- return nil, nil, err -- fatal error\r
- end\r
- socket:settimeout( 0 )\r
- handler.readbuffer = handshake\r
- handler.sendbuffer = handshake\r
- handshake( socket ) -- do handshake\r
- if not socket then\r
- return nil, nil, "ssl handshake failed";\r
- end\r
- else\r
- -- We're not automatically doing SSL, so we're not secure (yet)\r
- ssl = false\r
- handler.starttls = function( self, now )\r
- if not now then\r
- --out_put "server.lua: we need to do tls, but delaying until later"\r
- needtls = true\r
- return\r
- end\r
- --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )\r
- local oldsocket, err = socket\r
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket\r
- --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) )\r
- if err then\r
- out_put( "server.lua: error while starting tls on client: ", tostring(err) )\r
- return nil, err -- fatal error\r
- end\r
-\r
- socket:settimeout( 0 )\r
-\r
- -- add the new socket to our system\r
-\r
- send = socket.send\r
- receive = socket.receive\r
- shutdown = id\r
-\r
- _socketlist[ socket ] = handler\r
- _readlistlen = addsocket(_readlist, socket, _readlistlen)\r
-\r
- -- remove traces of the old socket\r
-\r
- _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )\r
- _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )\r
- _socketlist[ oldsocket ] = nil\r
-\r
- handler.starttls = nil\r
- needtls = nil\r
- \r
- -- Secure now\r
- ssl = true\r
-\r
- handler.readbuffer = handshake\r
- handler.sendbuffer = handshake\r
- handshake( socket ) -- do handshake\r
- end\r
- handler.readbuffer = _readbuffer\r
- handler.sendbuffer = _sendbuffer\r
- end\r
- else -- normal connection\r
- ssl = false\r
- handler.readbuffer = _readbuffer\r
- handler.sendbuffer = _sendbuffer\r
- end\r
-\r
- send = socket.send\r
- receive = socket.receive\r
- shutdown = ( ssl and id ) or socket.shutdown\r
-\r
- _socketlist[ socket ] = handler\r
- _readlistlen = addsocket(_readlist, socket, _readlistlen)\r
-\r
- return handler, socket\r
-end\r
-\r
-id = function( )\r
-end\r
-\r
-idfalse = function( )\r
- return false\r
-end\r
-\r
-addsocket = function( list, socket, len )\r
- if not list[ socket ] then\r
- len = len + 1\r
- list[ len ] = socket\r
- list[ socket ] = len\r
- end\r
- return len;\r
-end\r
-\r
-removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )\r
- local pos = list[ socket ]\r
- if pos then\r
- list[ socket ] = nil\r
- local last = list[ len ]\r
- list[ len ] = nil\r
- if last ~= socket then\r
- list[ last ] = pos\r
- list[ pos ] = last\r
- end\r
- return len - 1\r
- end\r
- return len\r
-end\r
-\r
-closesocket = function( socket )\r
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )\r
- _readlistlen = removesocket( _readlist, socket, _readlistlen )\r
- _socketlist[ socket ] = nil\r
- socket:close( )\r
- --mem_free( )\r
-end\r
-\r
-----------------------------------// PUBLIC //--\r
-\r
-addserver = function( addr, port, listeners, pattern, sslctx, startssl ) -- this function provides a way for other scripts to reg a server\r
- local err\r
- --out_put("server.lua: autossl on ", port, " is ", startssl)\r
- if type( listeners ) ~= "table" then\r
- err = "invalid listener table"\r
- end\r
- if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then\r
- err = "invalid port"\r
- elseif _server[ port ] then\r
- err = "listeners on port '" .. port .. "' already exist"\r
- elseif sslctx and not luasec then\r
- err = "luasec not found"\r
- end\r
- if err then\r
- out_error( "server.lua, port ", port, ": ", err )\r
- return nil, err\r
- end\r
- addr = addr or "*"\r
- local server, err = socket_bind( addr, port )\r
- if err then\r
- out_error( "server.lua, port ", port, ": ", err )\r
- return nil, err\r
- end\r
- local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver, startssl ) -- wrap new server socket\r
- if not handler then\r
- server:close( )\r
- return nil, err\r
- end\r
- server:settimeout( 0 )\r
- _readlistlen = addsocket(_readlist, server, _readlistlen)\r
- _server[ port ] = handler\r
- _socketlist[ server ] = handler\r
- out_put( "server.lua: new server listener on '", addr, ":", port, "'" )\r
- return handler\r
-end\r
-\r
-getserver = function ( port )\r
- return _server[ port ];\r
-end\r
-\r
-removeserver = function( port )\r
- local handler = _server[ port ]\r
- if not handler then\r
- return nil, "no server found on port '" .. tostring( port ) .. "'"\r
- end\r
- handler:close( )\r
- _server[ port ] = nil\r
- return true\r
-end\r
-\r
-closeall = function( )\r
- for _, handler in pairs( _socketlist ) do\r
- handler:close( )\r
- _socketlist[ _ ] = nil\r
- end\r
- _readlistlen = 0\r
- _sendlistlen = 0\r
- _timerlistlen = 0\r
- _server = { }\r
- _readlist = { }\r
- _sendlist = { }\r
- _timerlist = { }\r
- _socketlist = { }\r
- --mem_free( )\r
-end\r
-\r
-getsettings = function( )\r
- return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake\r
-end\r
-\r
-changesettings = function( new )\r
- if type( new ) ~= "table" then\r
- return nil, "invalid settings table"\r
- end\r
- _selecttimeout = tonumber( new.timeout ) or _selecttimeout\r
- _sleeptime = tonumber( new.sleeptime ) or _sleeptime\r
- _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen\r
- _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen\r
- _checkinterval = tonumber( new.checkinterval ) or _checkinterval\r
- _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout\r
- _readtimeout = tonumber( new.readtimeout ) or _readtimeout\r
- _cleanqueue = new.cleanqueue\r
- _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver\r
- _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake\r
- return true\r
-end\r
-\r
-addtimer = function( listener )\r
- if type( listener ) ~= "function" then\r
- return nil, "invalid listener function"\r
- end\r
- _timerlistlen = _timerlistlen + 1\r
- _timerlist[ _timerlistlen ] = listener\r
- return true\r
-end\r
-\r
-stats = function( )\r
- return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen\r
-end\r
-\r
-local dontstop = true; -- thinking about tomorrow, ...\r
-\r
-setquitting = function (quit)\r
- dontstop = not quit;\r
- return;\r
-end\r
-\r
-loop = function( ) -- this is the main loop of the program\r
- while dontstop do\r
- local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout )\r
- for i, socket in ipairs( write ) do -- send data waiting in writequeues\r
- local handler = _socketlist[ socket ]\r
- if handler then\r
- handler.sendbuffer( )\r
- else\r
- closesocket( socket )\r
- out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen\r
- end\r
- end\r
- for i, socket in ipairs( read ) do -- receive data\r
- local handler = _socketlist[ socket ]\r
- if handler then\r
- handler.readbuffer( )\r
- else\r
- closesocket( socket )\r
- out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen\r
- end\r
- end\r
- for handler, err in pairs( _closelist ) do\r
- handler.disconnect( )( handler, err )\r
- handler:close( true ) -- forced disconnect\r
- end\r
- clean( _closelist )\r
- _currenttime = os_time( )\r
- if os_difftime( _currenttime - _timer ) >= 1 then\r
- for i = 1, _timerlistlen do\r
- _timerlist[ i ]( _currenttime ) -- fire timers\r
- end\r
- _timer = _currenttime\r
- end\r
- socket_sleep( _sleeptime ) -- wait some time\r
- --collectgarbage( )\r
- end\r
- return "quitting"\r
-end\r
-\r
---// EXPERIMENTAL //--\r
-\r
-local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl )\r
- local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl )\r
- _socketlist[ socket ] = handler\r
- _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)\r
- return handler, socket\r
-end\r
-\r
-local addclient = function( address, port, listeners, pattern, sslctx, startssl )\r
- local client, err = luasocket.tcp( )\r
- if err then\r
- return nil, err\r
- end\r
- client:settimeout( 0 )\r
- _, err = client:connect( address, port )\r
- if err then -- try again\r
- local handler = wrapclient( client, address, port, listeners )\r
- else\r
- wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl )\r
- end\r
-end\r
-\r
---// EXPERIMENTAL //--\r
-\r
-----------------------------------// BEGIN //--\r
-\r
-use "setmetatable" ( _socketlist, { __mode = "k" } )\r
-use "setmetatable" ( _readtimes, { __mode = "k" } )\r
-use "setmetatable" ( _writetimes, { __mode = "k" } )\r
-\r
-_timer = os_time( )\r
-_starttime = os_time( )\r
-\r
-addtimer( function( )\r
- local difftime = os_difftime( _currenttime - _starttime )\r
- if difftime > _checkinterval then\r
- _starttime = _currenttime\r
- for handler, timestamp in pairs( _writetimes ) do\r
- if os_difftime( _currenttime - timestamp ) > _sendtimeout then\r
- --_writetimes[ handler ] = nil\r
- handler.disconnect( )( handler, "send timeout" )\r
- handler:close( true ) -- forced disconnect\r
- end\r
- end\r
- for handler, timestamp in pairs( _readtimes ) do\r
- if os_difftime( _currenttime - timestamp ) > _readtimeout then\r
- --_readtimes[ handler ] = nil\r
- handler.disconnect( )( handler, "read timeout" )\r
- handler:close( ) -- forced disconnect?\r
- end\r
- end\r
- end\r
- end\r
-)\r
-\r
-----------------------------------// PUBLIC INTERFACE //--\r
-\r
-return {\r
-\r
- addclient = addclient,\r
- wrapclient = wrapclient,\r
- \r
- loop = loop,\r
- stats = stats,\r
- closeall = closeall,\r
- addtimer = addtimer,\r
- addserver = addserver,\r
- getserver = getserver,\r
- getsettings = getsettings,\r
- setquitting = setquitting,\r
- removeserver = removeserver,\r
- changesettings = changesettings,\r
-}\r
+--
+-- server.lua by blastbeat of the luadch project
+-- Re-used here under the MIT/X Consortium License
+--
+-- Modifications (C) 2008-2010 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 tonumber = use "tonumber"
+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_difftime = os.difftime
+local math_min = math.min
+local math_huge = math.huge
+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 = use "ssl"
+local luasocket = use "socket" or require "socket"
+local luasocket_gettime = luasocket.gettime
+
+--// 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 addsocket
+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
+
+local _maxsslhandshake
+
+----------------------------------// 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 = 3600 -- 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 ) -- this function wraps a server
+
+ maxconnections = maxconnections or _maxclientsperserver
+
+ local connections = 0
+
+ local dispatch, disconnect = listeners.onconnect or listeners.onincoming, listeners.ondisconnect
+
+ local accept = socket.accept
+
+ --// public methods of the object //--
+
+ local handler = { }
+
+ handler.shutdown = function( ) end
+
+ handler.ssl = function( )
+ return sslctx ~= nil
+ 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 ) -- 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 ) -- 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.onincoming
+ local status = listeners.onstatus
+ local disconnect = listeners.ondisconnect
+ local drain = listeners.ondrain
+
+ 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( self, listeners )
+ dispatch = listeners.onincoming
+ disconnect = listeners.ondisconnect
+ status = listeners.onstatus
+ drain = listeners.ondrain
+ 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.setoption = function (self, option, value)
+ if socket.setoption then
+ return socket:setoption(option, value);
+ end
+ return false, "setoption not implemented";
+ end
+ handler.close = function( self, 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( self, 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( self )
+ return bufferqueue
+ end
+ handler.socket = function( self )
+ return socket
+ end
+ handler.set_mode = function( self, new )
+ pattern = new or pattern
+ return pattern
+ end
+ handler.set_send = function ( self, newsend )
+ send = newsend or send
+ return send
+ end
+ handler.bufferlen = function( self, readlen, sendlen )
+ maxsendlen = sendlen or maxsendlen
+ maxreadlen = readlen or maxreadlen
+ return bufferlen, maxreadlen, maxsendlen
+ end
+ --TODO: Deprecate
+ handler.lock_read = function (self, switch)
+ if switch == true then
+ local tmp = _readlistlen
+ _readlistlen = removesocket( _readlist, socket, _readlistlen )
+ _readtimes[ handler ] = nil
+ if _readlistlen ~= tmp then
+ noread = true
+ end
+ elseif switch == false then
+ if noread then
+ noread = false
+ _readlistlen = addsocket(_readlist, socket, _readlistlen)
+ _readtimes[ handler ] = _currenttime
+ end
+ end
+ return noread
+ end
+ handler.pause = function (self)
+ return self:lock_read(true);
+ end
+ handler.resume = function (self)
+ return self:lock_read(false);
+ end
+ handler.lock = function( self, switch )
+ handler.lock_read (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
+ elseif switch == false then
+ handler.write = write
+ 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 == "wantread" or err == "timeout") 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
+ _writetimes[ handler ] = nil
+ if drain then
+ drain(handler)
+ end
+ _ = needtls and handler:starttls(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(self, 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 luasec then
+ if sslctx then -- ssl?
+ handler:set_sslctx(sslctx);
+ 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
+ local sslctx;
+ handler.starttls = function( self, _sslctx)
+ if _sslctx then
+ sslctx = _sslctx;
+ handler:set_sslctx(sslctx);
+ end
+ if bufferqueuelen > 0 then
+ out_put "server.lua: we need to do tls, but delaying until send buffer empty"
+ 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
+ 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
+
+local function link(sender, receiver, buffersize)
+ local sender_locked;
+ local _sendbuffer = receiver.sendbuffer;
+ function receiver.sendbuffer()
+ _sendbuffer();
+ if sender_locked and receiver.bufferlen() < buffersize then
+ sender:lock_read(false); -- Unlock now
+ sender_locked = nil;
+ end
+ end
+
+ local _readbuffer = sender.readbuffer;
+ function sender.readbuffer()
+ _readbuffer();
+ if not sender_locked and receiver.bufferlen() >= buffersize then
+ sender_locked = true;
+ sender:lock_read(true);
+ end
+ end
+end
+
+----------------------------------// PUBLIC //--
+
+addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server
+ local err
+ if type( listeners ) ~= "table" then
+ err = "invalid listener table"
+ end
+ if 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, _maxclientsperserver ) -- 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 "..(sslctx and "ssl " or "").."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 quitting;
+
+setquitting = function (quit)
+ quitting = not not quit;
+end
+
+loop = function(once) -- this is the main loop of the program
+ if quitting then return "quitting"; end
+ if once then quitting = "once"; end
+ local next_timer_time = math_huge;
+ repeat
+ local read, write, err = socket_select( _readlist, _sendlist, math_min(_selecttimeout, next_timer_time) )
+ 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 = luasocket_gettime( )
+ if _currenttime - _timer >= math_min(next_timer_time, 1) then
+ next_timer_time = math_huge;
+ for i = 1, _timerlistlen do
+ local t = _timerlist[ i ]( _currenttime ) -- fire timers
+ if t then next_timer_time = math_min(next_timer_time, t); end
+ end
+ _timer = _currenttime
+ else
+ next_timer_time = next_timer_time - (_currenttime - _timer);
+ end
+ socket_sleep( _sleeptime ) -- wait some time
+ --collectgarbage( )
+ until quitting;
+ if once and quitting == "once" then quitting = nil; return; end
+ return "quitting"
+end
+
+step = function ()
+ return loop(true);
+end
+
+local function get_backend()
+ return "select";
+end
+
+--// EXPERIMENTAL //--
+
+local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx )
+ local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx )
+ _socketlist[ socket ] = handler
+ _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
+ if listeners.onconnect then
+ -- When socket is writeable, call onconnect
+ local _sendbuffer = handler.sendbuffer;
+ handler.sendbuffer = function ()
+ handler.sendbuffer = _sendbuffer;
+ listeners.onconnect(handler);
+ -- If there was data with the incoming packet, handle it now.
+ if #handler:bufferqueue() > 0 then
+ return _sendbuffer();
+ end
+ end
+ end
+ return handler, socket
+end
+
+local addclient = function( address, port, listeners, pattern, sslctx )
+ 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 )
+ end
+end
+
+--// EXPERIMENTAL //--
+
+----------------------------------// BEGIN //--
+
+use "setmetatable" ( _socketlist, { __mode = "k" } )
+use "setmetatable" ( _readtimes, { __mode = "k" } )
+use "setmetatable" ( _writetimes, { __mode = "k" } )
+
+_timer = luasocket_gettime( )
+_starttime = luasocket_gettime( )
+
+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
+)
+
+local function setlogger(new_logger)
+ local old_logger = log;
+ if new_logger then
+ log = new_logger;
+ end
+ return old_logger;
+end
+
+----------------------------------// PUBLIC INTERFACE //--
+
+return {
+
+ addclient = addclient,
+ wrapclient = wrapclient,
+
+ loop = loop,
+ link = link,
+ stats = stats,
+ closeall = closeall,
+ addtimer = addtimer,
+ addserver = addserver,
+ getserver = getserver,
+ setlogger = setlogger,
+ getsettings = getsettings,
+ setquitting = setquitting,
+ removeserver = removeserver,
+ get_backend = get_backend,
+ changesettings = changesettings,
+}
projects / prosody.git / blobdiff