-----------------------------------// 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