---[[
-
- server.lua by blastbeat of the luadch project
-
- re-used here under the MIT/X Consortium License
-
- Modifications (C) 2008 Matthew Wild, Waqas Hussain
-]]--
-
-----------------------------------// DECLARATION //--
-
---// constants //--
-
-local STAT_UNIT = 1 / ( 1024 * 1024 ) -- mb
-
---// lua functions //--
-
-local function use( what ) return _G[ what ] end
-
-local type = use "type"
-local pairs = use "pairs"
-local ipairs = use "ipairs"
-local tostring = use "tostring"
-local collectgarbage = use "collectgarbage"
-
---// lua libs //--
-
-local table = use "table"
-local coroutine = use "coroutine"
-
---// lua lib methods //--
-
-local table_concat = table.concat
-local table_remove = table.remove
-local string_sub = use'string'.sub
-local coroutine_wrap = coroutine.wrap
-local coroutine_yield = coroutine.yield
-local print = print;
-
-local log = require "util.logger".init("server");
-local out_put = function () end --print;
-local out_error = function (...) log("error", table_concat({...}, " ")); end
-
---// 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_select = luasocket.select
-local ssl_newcontext = ( luasec and luasec.newcontext )
-
---// functions //--
-
-local loop
-local stats
-local addtimer
-local closeall
-local addserver
-local firetimer
-local closesocket
-local removesocket
-local wrapserver
-local wraptcpclient
-local wrapsslclient
-
---// tables //--
-
-local listener
-local readlist
-local writelist
-local socketlist
-local timelistener
-
---// simple data types //--
-
-local _
-local readlen = 0 -- length of readlist
-local writelen = 0 -- lenght of writelist
-
-local sendstat= 0
-local receivestat = 0
-
-----------------------------------// DEFINITION //--
-
-listener = { } -- key = port, value = table
-readlist = { } -- array with sockets to read from
-writelist = { } -- arrary with sockets to write to
-socketlist = { } -- key = socket, value = wrapped socket
-timelistener = { }
-
-stats = function( )
- return receivestat, sendstat
-end
-
-wrapserver = function( listener, socket, ip, serverport, mode, sslctx, wrapper_function ) -- this function wraps a server
-
- local dispatch, disconnect = listener.listener, listener.disconnect -- dangerous
-
- local wrapclient, err
-
- out_put("Starting a new server on "..tostring(serverport).." with ssl: "..tostring(sslctx));
- if sslctx then
- if not ssl_newcontext then
- return nil, "luasec not found"
- end
- if type( sslctx ) ~= "table" then
- out_error "server.lua: wrong server sslctx"
- return nil, "wrong server sslctx"
- end
- sslctx, err = ssl_newcontext( sslctx )
- if not sslctx then
- err = err or "wrong sslctx parameters"
- out_error( "server.lua: ", err )
- return nil, err
- end
- end
-
- if wrapper_function then
- wrapclient = wrapper_function
- elseif sslctx then
- wrapclient = wrapsslclient
- else
- wrapclient = wraptcpclient
- end
-
- local accept = socket.accept
- local close = socket.close
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.shutdown = function( ) end
-
- --[[handler.listener = function( data, err )
- return ondata( handler, data, err )
- end]]
- handler.ssl = function( )
- return sslctx and true or false
- end
- handler.close = function( closed )
- _ = not closed and close( socket )
- writelen = removesocket( writelist, socket, writelen )
- readlen = removesocket( readlist, socket, readlen )
- socketlist[ socket ] = nil
- handler = nil
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.socket = function( )
- return socket
- end
- handler.receivedata = function( )
- local client, err = accept( socket ) -- try to accept
- if client then
- local ip, clientport = client:getpeername( )
- client:settimeout( 0 )
- local handler, client, err = wrapclient( listener, client, ip, serverport, clientport, mode, sslctx ) -- wrap new client socket
- if err then -- error while wrapping ssl socket
- return false
- end
- out_put( "server.lua: accepted new client connection from ", ip, ":", clientport )
- return dispatch( handler )
- elseif err then -- maybe timeout or something else
- out_put( "server.lua: error with new client connection: ", err )
- return false
- end
- end
- return handler
-end
-
-wrapsslclient = function( listener, socket, ip, serverport, clientport, mode, sslctx ) -- this function wraps a ssl cleint
-
- local dispatch, disconnect = listener.listener, listener.disconnect
-
- --// transform socket to ssl object //--
-
- local err
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- if err then
- out_put( "server.lua: ssl error: ", err )
- return nil, nil, err -- fatal error
- end
- socket:settimeout( 0 )
-
- --// private closures of the object //--
-
- local writequeue = { } -- buffer for messages to send
-
- local eol, fatal_send_error, wants_closing
-
- local sstat, rstat = 0, 0
-
- --// local import of socket methods //--
-
- local send = socket.send
- local receive = socket.receive
- local close = socket.close
- --local shutdown = socket.shutdown
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.getstats = function( )
- return rstat, sstat
- end
-
- handler.listener = function( data, err )
- return listener( handler, data, err )
- end
- handler.ssl = function( )
- return true
- 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( closed )
- if eol and not fatal_send_error then
- -- There is data in the buffer, and we haven't experienced
- -- an error trying to send yet, so we'll flush the buffer now
- handler._dispatchdata();
- if eol then
- -- and there is *still* data in the buffer
- -- we'll give up for now, and close later
- wants_closing = true;
- return;
- end
- end
- close( socket )
- writelen = ( eol and removesocket( writelist, socket, writelen ) ) or writelen
- readlen = removesocket( readlist, socket, readlen )
- socketlist[ socket ] = nil
- out_put "server.lua: closed handler and removed socket from list"
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.clientport = function( )
- return clientport
- end
-
- handler.write = function( data )
- if not eol then
- writelen = writelen + 1
- writelist[ writelen ] = socket
- eol = 0
- end
- eol = eol + 1
- writequeue[ eol ] = data
- end
- handler.writequeue = function( )
- return writequeue
- end
- handler.socket = function( )
- return socket
- end
- handler.mode = function( )
- return mode
- end
- handler._receivedata = function( )
- local data, err, part = receive( socket, mode ) -- receive data in "mode"
- if not err or ( err == "timeout" or err == "wantread" ) then -- received something
- local data = data or part or ""
- local count = #data * STAT_UNIT
- rstat = rstat + count
- receivestat = receivestat + count
- --out_put( "server.lua: read data '", data, "', error: ", err )
- return dispatch( handler, data, err )
- else -- connections was closed or fatal error
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
- handler._dispatchdata = function( ) -- this function writes data to handlers
- local buffer = table_concat( writequeue, "", 1, eol )
- local succ, err, byte = send( socket, buffer )
- local count = ( succ or 0 ) * STAT_UNIT
- sstat = sstat + count
- sendstat = sendstat + count
- out_put( "server.lua: sended '", buffer, "', bytes: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport )
- if succ then -- sending succesful
- --writequeue = { }
- eol = nil
- writelen = removesocket( writelist, socket, writelen ) -- delete socket from writelist
- if wants_closing then
- handler.close();
- end
- return true
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
- buffer = string_sub( buffer, byte + 1, -1 ) -- new buffer
- writequeue[ 1 ] = buffer -- insert new buffer in queue
- eol = 1
- return true
- else -- connection was closed during sending or fatal error
- fatal_send_error = true;
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
-
- -- // COMPAT // --
-
- handler.getIp = handler.ip
- handler.getPort = handler.clientport
-
- --// handshake //--
-
- local wrote
-
- handler.handshake = coroutine_wrap( function( client )
- local err
- for i = 1, 10 do -- 10 handshake attemps
- _, err = client:dohandshake( )
- if not err then
- out_put( "server.lua: ssl handshake done" )
- writelen = ( wrote and removesocket( writelist, socket, writelen ) ) or writelen
- handler.receivedata = handler._receivedata -- when handshake is done, replace the handshake function with regular functions
- handler.dispatchdata = handler._dispatchdata
- return dispatch( handler )
- else
- out_put( "server.lua: error during ssl handshake: ", err )
- if err == "wantwrite" then
- if wrote == nil then
- writelen = writelen + 1
- writelist[ writelen ] = client
- wrote = true
- end
- end
- coroutine_yield( handler, nil, err ) -- handshake not finished
- end
- end
- _ = err ~= "closed" and close( socket )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false -- handshake failed
- end
- )
- handler.receivedata = handler.handshake
- handler.dispatchdata = handler.handshake
-
- handler.handshake( socket ) -- do handshake
-
- socketlist[ socket ] = handler
- readlen = readlen + 1
- readlist[ readlen ] = socket
-
- return handler, socket
-end
-
-wraptlsclient = function( listener, socket, ip, serverport, clientport, mode, sslctx ) -- this function wraps a tls cleint
-
- local dispatch, disconnect = listener.listener, listener.disconnect
-
- --// transform socket to ssl object //--
-
- local err
-
- socket:settimeout( 0 )
- --// private closures of the object //--
-
- local writequeue = { } -- buffer for messages to send
-
- local eol, fatal_send_error, wants_closing
-
- local sstat, rstat = 0, 0
-
- --// local import of socket methods //--
-
- local send = socket.send
- local receive = socket.receive
- local close = socket.close
- --local shutdown = socket.shutdown
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.getstats = function( )
- return rstat, sstat
- end
-
- handler.listener = function( data, err )
- return listener( handler, data, err )
- end
- handler.ssl = function( )
- return false
- 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( closed )
- if eol and not fatal_send_error then
- -- There is data in the buffer, and we haven't experienced
- -- an error trying to send yet, so we'll flush the buffer now
- handler._dispatchdata();
- if eol then
- -- and there is *still* data in the buffer
- -- we'll give up for now, and close later
- wants_closing = true;
- return;
- end
- end
- close( socket )
- writelen = ( eol and removesocket( writelist, socket, writelen ) ) or writelen
- readlen = removesocket( readlist, socket, readlen )
- socketlist[ socket ] = nil
- out_put "server.lua: closed handler and removed socket from list"
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.clientport = function( )
- return clientport
- end
-
- handler.write = function( data )
- if not eol then
- writelen = writelen + 1
- writelist[ writelen ] = socket
- eol = 0
- end
- eol = eol + 1
- writequeue[ eol ] = data
- end
- handler.writequeue = function( )
- return writequeue
- end
- handler.socket = function( )
- return socket
- end
- handler.mode = function( )
- return mode
- end
- handler._receivedata = function( )
- local data, err, part = receive( socket, mode ) -- receive data in "mode"
- if not err or ( err == "timeout" or err == "wantread" ) then -- received something
- local data = data or part or ""
- local count = #data * STAT_UNIT
- rstat = rstat + count
- receivestat = receivestat + count
- --out_put( "server.lua: read data '", data, "', error: ", err )
- return dispatch( handler, data, err )
- else -- connections was closed or fatal error
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
- handler._dispatchdata = function( ) -- this function writes data to handlers
- local buffer = table_concat( writequeue, "", 1, eol )
- local succ, err, byte = send( socket, buffer )
- local count = ( succ or 0 ) * STAT_UNIT
- sstat = sstat + count
- sendstat = sendstat + count
- out_put( "server.lua: sended '", buffer, "', bytes: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport )
- if succ then -- sending succesful
- --writequeue = { }
- eol = nil
- writelen = removesocket( writelist, socket, writelen ) -- delete socket from writelist
- if handler.need_tls then
- out_put("server.lua: connection is ready for tls handshake");
- handler.starttls(true);
- end
- if wants_closing then
- handler.close();
- end
- return true
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
- buffer = string_sub( buffer, byte + 1, -1 ) -- new buffer
- writequeue[ 1 ] = buffer -- insert new buffer in queue
- eol = 1
- return true
- else -- connection was closed during sending or fatal error
- fatal_send_error = true; -- :(
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
-
- handler.receivedata, handler.dispatchdata = handler._receivedata, handler._dispatchdata;
- -- // COMPAT // --
-
- handler.getIp = handler.ip
- handler.getPort = handler.clientport
-
- --// handshake //--
-
- local wrote, read
-
- handler.starttls = function (now)
- if not now then out_put("server.lua: we need to do tls, but delaying until later"); handler.need_tls = true; return; end
- out_put( "server.lua: attempting to start tls on "..tostring(socket) )
- local oldsocket = socket;
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- out_put("sslwrapped socket is "..tostring(socket));
- if err then
- out_put( "server.lua: ssl error: ", err )
- return nil, nil, err -- fatal error
- end
- socket:settimeout(0);
-
- -- Add the new socket to our system
- socketlist[ socket ] = handler
- readlen = readlen + 1
- readlist[ readlen ] = socket
-
- -- Remove traces of the old socket
- readlen = removesocket( readlist, oldsocket, readlen )
- socketlist [ oldsocket ] = nil;
-
- send = socket.send
- receive = socket.receive
- close = socket.close
- handler.ssl = function( )
- return true
- 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.starttls = nil;
- handler.need_tls = nil
-
- handler.handshake = coroutine_wrap( function( client )
- local err
- for i = 1, 10 do -- 10 handshake attemps
- _, err = client:dohandshake( )
- if not err then
- out_put( "server.lua: ssl handshake done" )
- writelen = ( wrote and removesocket( writelist, socket, writelen ) ) or writelen
- handler.receivedata = handler._receivedata -- when handshake is done, replace the handshake function with regular functions
- handler.dispatchdata = handler._dispatchdata;
- return true;
- else
- out_put( "server.lua: error during ssl handshake: ", err )
- if err == "wantwrite" then
- if wrote == nil then
- writelen = writelen + 1
- writelist[ writelen ] = client
- wrote = true
- end
- end
- coroutine_yield( handler, nil, err ) -- handshake not finished
- end
- end
- _ = err ~= "closed" and close( socket )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false -- handshake failed
- end
- )
- handler.receivedata = handler.handshake
- handler.dispatchdata = handler.handshake
-
- handler.handshake( socket ) -- do handshake
- end
- socketlist[ socket ] = handler
- readlen = readlen + 1
- readlist[ readlen ] = socket
-
- return handler, socket
-end
-
-wraptcpclient = function( listener, socket, ip, serverport, clientport, mode ) -- this function wraps a socket
-
- local dispatch, disconnect = listener.listener, listener.disconnect
-
- --// private closures of the object //--
-
- local writequeue = { } -- list for messages to send
-
- local eol, fatal_send_error, wants_closing
-
- socket:settimeout(0);
-
- local rstat, sstat = 0, 0
-
- --// local import of socket methods //--
-
- local send = socket.send
- local receive = socket.receive
- local close = socket.close
- local shutdown = socket.shutdown
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.getstats = function( )
- return rstat, sstat
- end
-
- handler.listener = function( data, err )
- return listener( handler, data, err )
- end
- handler.ssl = function( )
- return false
- 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( closed )
- if eol and not fatal_send_error then
- -- There is data in the buffer, and we haven't experienced
- -- an error trying to send yet, so we'll flush the buffer now
- handler.dispatchdata();
- if eol then
- -- and there is *still* data in the buffer
- -- we'll give up for now, and close later
- wants_closing = true;
- return;
- end
- end
- _ = not closed and shutdown( socket )
- _ = not closed and close( socket )
- writelen = ( eol and removesocket( writelist, socket, writelen ) ) or writelen
- readlen = removesocket( readlist, socket, readlen )
- socketlist[ socket ] = nil
- out_put "server.lua: closed handler and removed socket from list"
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.clientport = function( )
- return clientport
- end
- handler.write = function( data )
- if not eol then
- writelen = writelen + 1
- writelist[ writelen ] = socket
- eol = 0
- end
- eol = eol + 1
- writequeue[ eol ] = data
- end
- handler.writequeue = function( )
- return writequeue
- end
- handler.socket = function( )
- return socket
- end
- handler.mode = function( )
- return mode
- end
-
- handler.receivedata = function( )
- local data, err, part = receive( socket, mode ) -- receive data in "mode"
- if not err or ( err == "timeout" or err == "wantread" ) then -- received something
- local data = data or part or ""
- local count = #data * STAT_UNIT
- rstat = rstat + count
- receivestat = receivestat + count
- --out_put( "server.lua: read data '", data, "', error: ", err )
- return dispatch( handler, data, err )
- else -- connections was closed or fatal error
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
-
- handler.dispatchdata = function( ) -- this function writes data to handlers
- local buffer = table_concat( writequeue, "", 1, eol )
- local succ, err, byte = send( socket, buffer )
- local count = ( succ or 0 ) * STAT_UNIT
- sstat = sstat + count
- sendstat = sendstat + count
- out_put( "server.lua: sended '", buffer, "', bytes: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport )
- if succ then -- sending succesful
- --writequeue = { }
- eol = nil
- writelen = removesocket( writelist, socket, writelen ) -- delete socket from writelist
- if wants_closing then
- handler.close();
- end
- return true
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
- buffer = string_sub( buffer, byte + 1, -1 ) -- new buffer
- writequeue[ 1 ] = buffer -- insert new buffer in queue
- eol = 1
- return true
- else -- connection was closed during sending or fatal error
- fatal_send_error = true; -- :'-(
- out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )
- handler.close( )
- disconnect( handler, err )
- writequeue = nil
- handler = nil
- return false
- end
- end
-
- -- // COMPAT // --
-
- handler.getIp = handler.ip
- handler.getPort = handler.clientport
-
- socketlist[ socket ] = handler
- readlen = readlen + 1
- readlist[ readlen ] = socket
-
- return handler, socket
-end
-
-addtimer = function( listener )
- timelistener[ #timelistener + 1 ] = listener
-end
-
-firetimer = function( listener )
- for i, listener in ipairs( timelistener ) do
- listener( )
- end
-end
-
-addserver = function( listeners, port, addr, mode, sslctx, wrapper_function ) -- this function provides a way for other scripts to reg a server
- local err
- if type( listeners ) ~= "table" then
- err = "invalid listener table"
- else
- for name, func in pairs( listeners ) do
- if type( func ) ~= "function" then
- --err = "invalid listener function"
- break
- end
- end
- end
- if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then
- err = "invalid port"
- elseif listener[ 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: ", err )
- return nil, err
- end
- addr = addr or "*"
- local server, err = socket_bind( addr, port )
- if err then
- out_error( addr..":"..port.." -", err )
- return nil, err
- end
- local handler, err = wrapserver( listeners, server, addr, port, mode, sslctx, wrapper_function ) -- wrap new server socket
- if not handler then
- server:close( )
- return nil, err
- end
- server:settimeout( 0 )
- readlen = readlen + 1
- readlist[ readlen ] = server
- listener[ port ] = listeners
- socketlist[ server ] = handler
- out_put( "server.lua: new server listener on ", addr, ":", port )
- return true
-end
-
-removesocket = function( tbl, socket, len ) -- this function removes sockets from a list
- for i, target in ipairs( tbl ) do
- if target == socket then
- len = len - 1
- table_remove( tbl, i )
- return len
- end
- end
- return len
-end
-
-closeall = function( )
- for sock, handler in pairs( socketlist ) do
- handler.shutdown( )
- handler.close( )
- socketlist[ sock ] = nil
- end
- writelist, readlist, socketlist = { }, { }, { }
-end
-
-closesocket = function( socket )
- writelen = removesocket( writelist, socket, writelen )
- readlen = removesocket( readlist, socket, readlen )
- socketlist[ socket ] = nil
- socket:close( )
-end
-
-loop = function( ) -- this is the main loop of the program
- --signal_set( "hub", "run" )
- repeat
- local read, write, err = socket_select( readlist, writelist, 1 ) -- 1 sec timeout, nice for timers
- for i, socket in ipairs( write ) do -- send data waiting in writequeues
- local handler = socketlist[ socket ]
- if handler then
- handler.dispatchdata( )
- 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.receivedata( )
- else
- closesocket( socket )
- out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
- end
- end
- firetimer( )
- until false
- return
-end
-
-----------------------------------// BEGIN //--
-
-----------------------------------// PUBLIC INTERFACE //--
-
-return {
-
- add = addserver,
- loop = loop,
- stats = stats,
- closeall = closeall,
- addtimer = addtimer,
- wraptcpclient = wraptcpclient,
- wrapsslclient = wrapsslclient,
- wraptlsclient = wraptlsclient,
-}
+--[[\r
+\r
+ server.lua by blastbeat\r
+\r
+ - this script contains the server loop of the program\r
+ - other scripts can reg a server here\r
+\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 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
+----------------------------------// 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.incoming or listeners.listener, listeners.disconnect\r
+\r
+ local err\r
+\r
+ local ssl = false\r
+\r
+ if sslctx then\r
+ if not ssl_newcontext then\r
+ return nil, "luasec not found"\r
+ end\r
+ if type( sslctx ) ~= "table" then\r
+ out_error "server.lua: wrong server sslctx"\r
+ return nil, "wrong server sslctx"\r
+ end\r
+ sslctx, err = ssl_newcontext( sslctx )\r
+ if not sslctx then\r
+ err = err or "wrong sslctx parameters"\r
+ out_error( "server.lua: ", err )\r
+ return nil, err\r
+ end\r
+ ssl = true\r
+ else\r
+ out_put("server.lua: ", "ssl not enabled on ", serverport);\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.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 ", ip, ":", clientport, " to ", serverport)\r
+ return dispatch( handler )\r
+ elseif err then -- maybe timeout or something else\r
+ out_put( "server.lua: error with new client connection: ", 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.incoming or listeners.listener\r
+ local disconnect = listeners.disconnect\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( listeners )\r
+ dispatch = listeners.incoming\r
+ disconnect = listeners.disconnect\r
+ end\r
+ handler.getstats = function( )\r
+ return readtraffic, sendtraffic\r
+ end\r
+ handler.ssl = function( )\r
+ return ssl\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( forced )\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
+ handler.write = nil -- ... but no further writing allowed\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
+ shutdown( socket )\r
+ socket:close( )\r
+ _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )\r
+ _socketlist[ socket ] = nil\r
+ _writetimes[ handler ] = nil\r
+ _closelist[ handler ] = nil\r
+ handler = nil\r
+ socket = nil\r
+ mem_free( )\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( 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 not _sendlist[ socket ] then\r
+ _sendlistlen = _sendlistlen + 1\r
+ _sendlist[ _sendlistlen ] = socket\r
+ _sendlist[ socket ] = _sendlistlen\r
+ end\r
+ bufferqueuelen = bufferqueuelen + 1\r
+ bufferqueue[ bufferqueuelen ] = data\r
+ _writetimes[ handler ] = _writetimes[ handler ] or _currenttime\r
+ return true\r
+ end\r
+ handler.write = write\r
+ handler.bufferqueue = function( )\r
+ return bufferqueue\r
+ end\r
+ handler.socket = function( )\r
+ return socket\r
+ end\r
+ handler.pattern = function( new )\r
+ pattern = new or pattern\r
+ return pattern\r
+ end\r
+ handler.bufferlen = function( readlen, sendlen )\r
+ maxsendlen = sendlen or maxsendlen\r
+ maxreadlen = readlen or maxreadlen\r
+ return maxreadlen, maxsendlen\r
+ end\r
+ handler.lock = function( 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 = _readlistlen + 1\r
+ _readlist[ socket ] = _readlistlen\r
+ _readlist[ _readlistlen ] = socket\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 ( err == "timeout" or err == "wantread" ) 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, "', error: ", err )\r
+ return dispatch( handler, buffer, err )\r
+ else -- connections was closed or fatal error\r
+ out_put( "server.lua: client ", ip, ":", clientport, " error: ", err )\r
+ fatalerror = true\r
+ disconnect( handler, err )\r
+ handler.close( )\r
+ return false\r
+ end\r
+ end\r
+ local _sendbuffer = function( ) -- this function sends data\r
+ local buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )\r
+ local succ, err, byte = send( socket, buffer, 1, bufferlen )\r
+ local 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: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport )\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
+ _ = toclose and handler.close( )\r
+ _writetimes[ handler ] = nil\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 ", ip, ":", clientport, " error: ", err )\r
+ fatalerror = true\r
+ disconnect( handler, err )\r
+ handler.close( )\r
+ return false\r
+ end\r
+ end\r
+\r
+ if sslctx then -- ssl?\r
+ ssl = true\r
+ local wrote\r
+ local handshake = coroutine_wrap( function( client ) -- create handshake coroutine\r
+ local err\r
+ for i = 1, 10 do -- 10 handshake attemps\r
+ _, err = client:dohandshake( )\r
+ if not err then\r
+ --out_put( "server.lua: ssl handshake done" )\r
+ _sendlistlen = ( wrote and removesocket( _sendlist, socket, _sendlistlen ) ) or _sendlistlen\r
+ handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions\r
+ handler.sendbuffer = _sendbuffer\r
+ --return dispatch( handler )\r
+ return true\r
+ else\r
+ out_put( "server.lua: error during ssl handshake: ", err )\r
+ if err == "wantwrite" and not wrote then\r
+ _sendlistlen = _sendlistlen + 1\r
+ _sendlist[ _sendlistlen ] = client\r
+ wrote = true\r
+ end\r
+ --coroutine_yield( handler, nil, err ) -- handshake not finished\r
+ coroutine_yield( )\r
+ end\r
+ end\r
+ disconnect( handler, "max handshake attemps exceeded" )\r
+ handler.close( true ) -- forced disconnect\r
+ return false -- handshake failed\r
+ end\r
+ )\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: ", 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
+ else\r
+ handler.starttls = function( 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: ", 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 = _readlistlen + 1\r
+ _readlist[ _readlistlen ] = socket\r
+ _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
+ handler.receivedata = handler.handshake\r
+ handler.dispatchdata = handler.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 = _readlistlen + 1\r
+ _readlist[ _readlistlen ] = socket\r
+ _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
+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( listeners, port, addr, pattern, sslctx, maxconnections, 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: ", 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: ", err )\r
+ return nil, err\r
+ end\r
+ local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, maxconnections, 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 = _readlistlen + 1\r
+ _readlist[ _readlistlen ] = server\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
+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
+ 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\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
+ 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
+loop = function( ) -- this is the main loop of the program\r
+ while true 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 ]( ) -- fire timers\r
+ end\r
+ _timer = _currenttime\r
+ end\r
+ socket_sleep( _sleeptime ) -- wait some time\r
+ --collectgarbage( )\r
+ end\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 = _sendlistlen + 1\r
+ _sendlist[ _sendlistlen ] = socket\r
+ _sendlist[ socket ] = _sendlistlen\r
+ return handler, socket\r
+end\r
+\r
+local addclient = function( address, port, listeners, pattern, sslctx, startssl )\r
+ local client, err = socket.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( server, listeners, socket, 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
+ getsettings = getsettings,\r
+ removeserver = removeserver,\r
+ changesettings = changesettings,\r
+\r
+}\r
projects / prosody.git / commitdiff