--- a/server.lua Mon Aug 25 02:10:50 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,611 +0,0 @@
---[[
-
- server.lua by blastbeat
-
- - this script contains the server loop of the program
- - other scripts can reg a server here
-
-]]--
-
-----------------------------------// 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 out_put = function () end --print;
-local out_error = print;
-
---// extern libs //--
-
-local luasec = 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 ) -- this function wraps a server
-
- local dispatch, disconnect = listener.listener, listener.disconnect -- dangerous
-
- local wrapclient, err
-
- if sslctx then
- if not ssl_newcontext then
- return nil, "luasec not found"
--- elseif not cfg_get "use_ssl" then
--- return nil, "ssl is deactivated"
- 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
- 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 -- end of buffer
-
- 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 )
- 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
- 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
- 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
-
-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
-
- 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 )
- _ = 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
- 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
- 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 ) -- 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( "server.lua: ", err )
- return nil, err
- end
- local handler, err = wrapserver( listeners, server, addr, port, mode, sslctx ) -- 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( )
- --collectgarbage "collect"
- until false --signal_get "hub" ~= "run"
- return --signal_get "hub"
-end
-
-----------------------------------// BEGIN //--
-
-----------------------------------// PUBLIC INTERFACE //--
-
-return {
-
- add = addserver,
- loop = loop,
- stats = stats,
- closeall = closeall,
- addtimer = addtimer,
-
-}