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-rw-r--r--net/server_select.lua1842
1 files changed, 921 insertions, 921 deletions
diff --git a/net/server_select.lua b/net/server_select.lua
index f278edd5..4c923159 100644
--- a/net/server_select.lua
+++ b/net/server_select.lua
@@ -1,921 +1,921 @@
---
--- server.lua by blastbeat of the luadch project
--- Re-used here under the MIT/X Consortium License
---
--- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain
---
-
--- // wrapping luadch stuff // --
-
-local use = function( what )
- return _G[ what ]
-end
-local clean = function( tbl )
- for i, k in pairs( tbl ) do
- tbl[ i ] = nil
- end
-end
-
-local log, table_concat = require ("util.logger").init("socket"), table.concat;
-local out_put = function (...) return log("debug", table_concat{...}); end
-local out_error = function (...) return log("warn", table_concat{...}); end
-local mem_free = collectgarbage
-
-----------------------------------// DECLARATION //--
-
---// constants //--
-
-local STAT_UNIT = 1 -- byte
-
---// lua functions //--
-
-local type = use "type"
-local pairs = use "pairs"
-local ipairs = use "ipairs"
-local tostring = use "tostring"
-local collectgarbage = use "collectgarbage"
-
---// lua libs //--
-
-local os = use "os"
-local table = use "table"
-local string = use "string"
-local coroutine = use "coroutine"
-
---// lua lib methods //--
-
-local os_time = os.time
-local os_difftime = os.difftime
-local table_concat = table.concat
-local table_remove = table.remove
-local string_len = string.len
-local string_sub = string.sub
-local coroutine_wrap = coroutine.wrap
-local coroutine_yield = coroutine.yield
-
---// extern libs //--
-
-local luasec = select( 2, pcall( require, "ssl" ) )
-local luasocket = require "socket"
-
---// extern lib methods //--
-
-local ssl_wrap = ( luasec and luasec.wrap )
-local socket_bind = luasocket.bind
-local socket_sleep = luasocket.sleep
-local socket_select = luasocket.select
-local ssl_newcontext = ( luasec and luasec.newcontext )
-
---// functions //--
-
-local id
-local loop
-local stats
-local idfalse
-local addtimer
-local closeall
-local addserver
-local getserver
-local wrapserver
-local getsettings
-local closesocket
-local removesocket
-local removeserver
-local changetimeout
-local wrapconnection
-local changesettings
-
---// tables //--
-
-local _server
-local _readlist
-local _timerlist
-local _sendlist
-local _socketlist
-local _closelist
-local _readtimes
-local _writetimes
-
---// simple data types //--
-
-local _
-local _readlistlen
-local _sendlistlen
-local _timerlistlen
-
-local _sendtraffic
-local _readtraffic
-
-local _selecttimeout
-local _sleeptime
-
-local _starttime
-local _currenttime
-
-local _maxsendlen
-local _maxreadlen
-
-local _checkinterval
-local _sendtimeout
-local _readtimeout
-
-local _cleanqueue
-
-local _timer
-
-local _maxclientsperserver
-
-----------------------------------// DEFINITION //--
-
-_server = { } -- key = port, value = table; list of listening servers
-_readlist = { } -- array with sockets to read from
-_sendlist = { } -- arrary with sockets to write to
-_timerlist = { } -- array of timer functions
-_socketlist = { } -- key = socket, value = wrapped socket (handlers)
-_readtimes = { } -- key = handler, value = timestamp of last data reading
-_writetimes = { } -- key = handler, value = timestamp of last data writing/sending
-_closelist = { } -- handlers to close
-
-_readlistlen = 0 -- length of readlist
-_sendlistlen = 0 -- length of sendlist
-_timerlistlen = 0 -- lenght of timerlist
-
-_sendtraffic = 0 -- some stats
-_readtraffic = 0
-
-_selecttimeout = 1 -- timeout of socket.select
-_sleeptime = 0 -- time to wait at the end of every loop
-
-_maxsendlen = 51000 * 1024 -- max len of send buffer
-_maxreadlen = 25000 * 1024 -- max len of read buffer
-
-_checkinterval = 1200000 -- interval in secs to check idle clients
-_sendtimeout = 60000 -- allowed send idle time in secs
-_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs
-
-_cleanqueue = false -- clean bufferqueue after using
-
-_maxclientsperserver = 1000
-
-_maxsslhandshake = 30 -- max handshake round-trips
-----------------------------------// PRIVATE //--
-
-wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server
-
- maxconnections = maxconnections or _maxclientsperserver
-
- local connections = 0
-
- local dispatch, disconnect = listeners.onincoming, listeners.ondisconnect
-
- local err
-
- local ssl = false
-
- if sslctx then
- ssl = true
- if not ssl_newcontext then
- out_error "luasec not found"
- ssl = false
- end
- if type( sslctx ) ~= "table" then
- out_error "server.lua: wrong server sslctx"
- ssl = false
- end
- local ctx;
- ctx, err = ssl_newcontext( sslctx )
- if not ctx then
- err = err or "wrong sslctx parameters"
- local file;
- file = err:match("^error loading (.-) %(");
- if file then
- if file == "private key" then
- file = sslctx.key or "your private key";
- elseif file == "certificate" then
- file = sslctx.certificate or "your certificate file";
- end
- local reason = err:match("%((.+)%)$") or "some reason";
- if reason == "Permission denied" then
- reason = "Check that the permissions allow Prosody to read this file.";
- elseif reason == "No such file or directory" then
- reason = "Check that the path is correct, and the file exists.";
- elseif reason == "system lib" then
- reason = "Previous error (see logs), or other system error.";
- else
- reason = "Reason: "..tostring(reason or "unknown"):lower();
- end
- log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
- else
- log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err );
- end
- ssl = false
- end
- sslctx = ctx;
- end
- if not ssl then
- sslctx = false;
- if startssl then
- log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport )
- return nil, "Cannot start ssl, see log for details"
- end
- end
-
- local accept = socket.accept
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.shutdown = function( ) end
-
- handler.ssl = function( )
- return ssl
- end
- handler.sslctx = function( )
- return sslctx
- end
- handler.remove = function( )
- connections = connections - 1
- end
- handler.close = function( )
- for _, handler in pairs( _socketlist ) do
- if handler.serverport == serverport then
- handler.disconnect( handler, "server closed" )
- handler:close( true )
- end
- end
- socket:close( )
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _socketlist[ socket ] = nil
- handler = nil
- socket = nil
- --mem_free( )
- out_put "server.lua: closed server handler and removed sockets from list"
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.socket = function( )
- return socket
- end
- handler.readbuffer = function( )
- if connections > maxconnections then
- out_put( "server.lua: refused new client connection: server full" )
- return false
- end
- local client, err = accept( socket ) -- try to accept
- if client then
- local ip, clientport = client:getpeername( )
- client:settimeout( 0 )
- local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket
- if err then -- error while wrapping ssl socket
- return false
- end
- connections = connections + 1
- out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))
- return dispatch( handler )
- elseif err then -- maybe timeout or something else
- out_put( "server.lua: error with new client connection: ", tostring(err) )
- return false
- end
- end
- return handler
-end
-
-wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object
-
- socket:settimeout( 0 )
-
- --// local import of socket methods //--
-
- local send
- local receive
- local shutdown
-
- --// private closures of the object //--
-
- local ssl
-
- local dispatch = listeners.onincoming
- local status = listeners.status
- local disconnect = listeners.ondisconnect
-
- 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
- end
- handler.getstats = function( )
- return readtraffic, sendtraffic
- end
- handler.ssl = function( )
- return ssl
- end
- handler.sslctx = function ( )
- return sslctx
- end
- handler.send = function( _, data, i, j )
- return send( socket, data, i, j )
- end
- handler.receive = function( pattern, prefix )
- return receive( socket, pattern, prefix )
- end
- handler.shutdown = function( pattern )
- return shutdown( socket, pattern )
- end
- handler.close = function( 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.pattern = 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
- 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.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") or string_len(part) > 0 then -- received something
- local buffer = buffer or part or ""
- local len = string_len( buffer )
- if len > maxreadlen then
- disconnect( handler, "receive buffer exceeded" )
- handler.close( true )
- return false
- end
- local count = len * STAT_UNIT
- readtraffic = readtraffic + count
- _readtraffic = _readtraffic + count
- _readtimes[ handler ] = _currenttime
- --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )
- return dispatch( handler, buffer, err )
- else -- connections was closed or fatal error
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )
- fatalerror = true
- disconnect( handler, err )
- _ = handler and handler.close( )
- return false
- end
- end
- local _sendbuffer = function( ) -- this function sends data
- local succ, err, byte, buffer, count;
- local count;
- if socket then
- buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )
- succ, err, byte = send( socket, buffer, 1, bufferlen )
- count = ( succ or byte or 0 ) * STAT_UNIT
- sendtraffic = sendtraffic + count
- _sendtraffic = _sendtraffic + count
- _ = _cleanqueue and clean( bufferqueue )
- --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )
- else
- succ, err, count = false, "closed", 0;
- end
- if succ then -- sending succesful
- bufferqueuelen = 0
- bufferlen = 0
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist
- _ = needtls and handler:starttls(true)
- _writetimes[ handler ] = nil
- _ = toclose and handler.close( )
- return true
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
- buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer
- bufferqueue[ 1 ] = buffer -- insert new buffer in queue
- bufferqueuelen = 1
- bufferlen = bufferlen - byte
- _writetimes[ handler ] = _currenttime
- return true
- else -- connection was closed during sending or fatal error
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )
- fatalerror = true
- disconnect( handler, err )
- _ = handler and handler.close( )
- return false
- end
- end
-
- -- Set the sslctx
- local handshake;
- function handler.set_sslctx(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 sslctx then -- ssl?
- handler:set_sslctx(sslctx);
- if startssl then -- ssl now?
- --out_put("server.lua: ", "starting ssl handshake")
- local err
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- if err then
- out_put( "server.lua: ssl error: ", tostring(err) )
- --mem_free( )
- return nil, nil, err -- fatal error
- end
- socket:settimeout( 0 )
- handler.readbuffer = handshake
- handler.sendbuffer = handshake
- handshake( socket ) -- do handshake
- if not socket then
- return nil, nil, "ssl handshake failed";
- end
- else
- -- We're not automatically doing SSL, so we're not secure (yet)
- ssl = false
- handler.starttls = function( self, now )
- if not now then
- --out_put "server.lua: we need to do tls, but delaying until later"
- needtls = true
- return
- end
- --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )
- local oldsocket, err = socket
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) )
- if err then
- out_put( "server.lua: error while starting tls on client: ", tostring(err) )
- return nil, err -- fatal error
- end
-
- socket:settimeout( 0 )
-
- -- add the new socket to our system
-
- send = socket.send
- receive = socket.receive
- shutdown = id
-
- _socketlist[ socket ] = handler
- _readlistlen = addsocket(_readlist, socket, _readlistlen)
-
- -- remove traces of the old socket
-
- _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )
- _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )
- _socketlist[ oldsocket ] = nil
-
- handler.starttls = nil
- needtls = nil
-
- -- Secure now
- ssl = true
-
- handler.readbuffer = handshake
- handler.sendbuffer = handshake
- handshake( socket ) -- do handshake
- end
- handler.readbuffer = _readbuffer
- handler.sendbuffer = _sendbuffer
- end
- else -- normal connection
- ssl = false
- handler.readbuffer = _readbuffer
- handler.sendbuffer = _sendbuffer
- end
-
- send = socket.send
- receive = socket.receive
- shutdown = ( ssl and id ) or socket.shutdown
-
- _socketlist[ socket ] = handler
- _readlistlen = addsocket(_readlist, socket, _readlistlen)
-
- return handler, socket
-end
-
-id = function( )
-end
-
-idfalse = function( )
- return false
-end
-
-addsocket = function( list, socket, len )
- if not list[ socket ] then
- len = len + 1
- list[ len ] = socket
- list[ socket ] = len
- end
- return len;
-end
-
-removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )
- local pos = list[ socket ]
- if pos then
- list[ socket ] = nil
- local last = list[ len ]
- list[ len ] = nil
- if last ~= socket then
- list[ last ] = pos
- list[ pos ] = last
- end
- return len - 1
- end
- return len
-end
-
-closesocket = function( socket )
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _socketlist[ socket ] = nil
- socket:close( )
- --mem_free( )
-end
-
-----------------------------------// PUBLIC //--
-
-addserver = function( addr, port, listeners, pattern, sslctx, startssl ) -- this function provides a way for other scripts to reg a server
- local err
- --out_put("server.lua: autossl on ", port, " is ", startssl)
- if type( listeners ) ~= "table" then
- err = "invalid listener table"
- end
- if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then
- err = "invalid port"
- elseif _server[ port ] then
- err = "listeners on port '" .. port .. "' already exist"
- elseif sslctx and not luasec then
- err = "luasec not found"
- end
- if err then
- out_error( "server.lua, port ", port, ": ", err )
- return nil, err
- end
- addr = addr or "*"
- local server, err = socket_bind( addr, port )
- if err then
- out_error( "server.lua, port ", port, ": ", err )
- return nil, err
- end
- local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver, startssl ) -- wrap new server socket
- if not handler then
- server:close( )
- return nil, err
- end
- server:settimeout( 0 )
- _readlistlen = addsocket(_readlist, server, _readlistlen)
- _server[ port ] = handler
- _socketlist[ server ] = handler
- out_put( "server.lua: new server listener on '", addr, ":", port, "'" )
- return handler
-end
-
-getserver = function ( port )
- return _server[ port ];
-end
-
-removeserver = function( port )
- local handler = _server[ port ]
- if not handler then
- return nil, "no server found on port '" .. tostring( port ) .. "'"
- end
- handler:close( )
- _server[ port ] = nil
- return true
-end
-
-closeall = function( )
- for _, handler in pairs( _socketlist ) do
- handler:close( )
- _socketlist[ _ ] = nil
- end
- _readlistlen = 0
- _sendlistlen = 0
- _timerlistlen = 0
- _server = { }
- _readlist = { }
- _sendlist = { }
- _timerlist = { }
- _socketlist = { }
- --mem_free( )
-end
-
-getsettings = function( )
- return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake
-end
-
-changesettings = function( new )
- if type( new ) ~= "table" then
- return nil, "invalid settings table"
- end
- _selecttimeout = tonumber( new.timeout ) or _selecttimeout
- _sleeptime = tonumber( new.sleeptime ) or _sleeptime
- _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen
- _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen
- _checkinterval = tonumber( new.checkinterval ) or _checkinterval
- _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout
- _readtimeout = tonumber( new.readtimeout ) or _readtimeout
- _cleanqueue = new.cleanqueue
- _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver
- _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake
- return true
-end
-
-addtimer = function( listener )
- if type( listener ) ~= "function" then
- return nil, "invalid listener function"
- end
- _timerlistlen = _timerlistlen + 1
- _timerlist[ _timerlistlen ] = listener
- return true
-end
-
-stats = function( )
- return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen
-end
-
-local dontstop = true; -- thinking about tomorrow, ...
-
-setquitting = function (quit)
- dontstop = not quit;
- return;
-end
-
-loop = function( ) -- this is the main loop of the program
- while dontstop do
- local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout )
- for i, socket in ipairs( write ) do -- send data waiting in writequeues
- local handler = _socketlist[ socket ]
- if handler then
- handler.sendbuffer( )
- else
- closesocket( socket )
- out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen
- end
- end
- for i, socket in ipairs( read ) do -- receive data
- local handler = _socketlist[ socket ]
- if handler then
- handler.readbuffer( )
- else
- closesocket( socket )
- out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
- end
- end
- for handler, err in pairs( _closelist ) do
- handler.disconnect( )( handler, err )
- handler:close( true ) -- forced disconnect
- end
- clean( _closelist )
- _currenttime = os_time( )
- if os_difftime( _currenttime - _timer ) >= 1 then
- for i = 1, _timerlistlen do
- _timerlist[ i ]( _currenttime ) -- fire timers
- end
- _timer = _currenttime
- end
- socket_sleep( _sleeptime ) -- wait some time
- --collectgarbage( )
- end
- return "quitting"
-end
-
---// EXPERIMENTAL //--
-
-local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl )
- local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl )
- _socketlist[ socket ] = handler
- _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
- return handler, socket
-end
-
-local addclient = function( address, port, listeners, pattern, sslctx, startssl )
- local client, err = luasocket.tcp( )
- if err then
- return nil, err
- end
- client:settimeout( 0 )
- _, err = client:connect( address, port )
- if err then -- try again
- local handler = wrapclient( client, address, port, listeners )
- else
- wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl )
- end
-end
-
---// EXPERIMENTAL //--
-
-----------------------------------// BEGIN //--
-
-use "setmetatable" ( _socketlist, { __mode = "k" } )
-use "setmetatable" ( _readtimes, { __mode = "k" } )
-use "setmetatable" ( _writetimes, { __mode = "k" } )
-
-_timer = os_time( )
-_starttime = os_time( )
-
-addtimer( function( )
- local difftime = os_difftime( _currenttime - _starttime )
- if difftime > _checkinterval then
- _starttime = _currenttime
- for handler, timestamp in pairs( _writetimes ) do
- if os_difftime( _currenttime - timestamp ) > _sendtimeout then
- --_writetimes[ handler ] = nil
- handler.disconnect( )( handler, "send timeout" )
- handler:close( true ) -- forced disconnect
- end
- end
- for handler, timestamp in pairs( _readtimes ) do
- if os_difftime( _currenttime - timestamp ) > _readtimeout then
- --_readtimes[ handler ] = nil
- handler.disconnect( )( handler, "read timeout" )
- handler:close( ) -- forced disconnect?
- end
- end
- end
- end
-)
-
-----------------------------------// PUBLIC INTERFACE //--
-
-return {
-
- addclient = addclient,
- wrapclient = wrapclient,
-
- loop = loop,
- stats = stats,
- closeall = closeall,
- addtimer = addtimer,
- addserver = addserver,
- getserver = getserver,
- getsettings = getsettings,
- setquitting = setquitting,
- removeserver = removeserver,
- changesettings = changesettings,
-}
+--
+-- server.lua by blastbeat of the luadch project
+-- Re-used here under the MIT/X Consortium License
+--
+-- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain
+--
+
+-- // wrapping luadch stuff // --
+
+local use = function( what )
+ return _G[ what ]
+end
+local clean = function( tbl )
+ for i, k in pairs( tbl ) do
+ tbl[ i ] = nil
+ end
+end
+
+local log, table_concat = require ("util.logger").init("socket"), table.concat;
+local out_put = function (...) return log("debug", table_concat{...}); end
+local out_error = function (...) return log("warn", table_concat{...}); end
+local mem_free = collectgarbage
+
+----------------------------------// DECLARATION //--
+
+--// constants //--
+
+local STAT_UNIT = 1 -- byte
+
+--// lua functions //--
+
+local type = use "type"
+local pairs = use "pairs"
+local ipairs = use "ipairs"
+local tostring = use "tostring"
+local collectgarbage = use "collectgarbage"
+
+--// lua libs //--
+
+local os = use "os"
+local table = use "table"
+local string = use "string"
+local coroutine = use "coroutine"
+
+--// lua lib methods //--
+
+local os_time = os.time
+local os_difftime = os.difftime
+local table_concat = table.concat
+local table_remove = table.remove
+local string_len = string.len
+local string_sub = string.sub
+local coroutine_wrap = coroutine.wrap
+local coroutine_yield = coroutine.yield
+
+--// extern libs //--
+
+local luasec = select( 2, pcall( require, "ssl" ) )
+local luasocket = require "socket"
+
+--// extern lib methods //--
+
+local ssl_wrap = ( luasec and luasec.wrap )
+local socket_bind = luasocket.bind
+local socket_sleep = luasocket.sleep
+local socket_select = luasocket.select
+local ssl_newcontext = ( luasec and luasec.newcontext )
+
+--// functions //--
+
+local id
+local loop
+local stats
+local idfalse
+local addtimer
+local closeall
+local addserver
+local getserver
+local wrapserver
+local getsettings
+local closesocket
+local removesocket
+local removeserver
+local changetimeout
+local wrapconnection
+local changesettings
+
+--// tables //--
+
+local _server
+local _readlist
+local _timerlist
+local _sendlist
+local _socketlist
+local _closelist
+local _readtimes
+local _writetimes
+
+--// simple data types //--
+
+local _
+local _readlistlen
+local _sendlistlen
+local _timerlistlen
+
+local _sendtraffic
+local _readtraffic
+
+local _selecttimeout
+local _sleeptime
+
+local _starttime
+local _currenttime
+
+local _maxsendlen
+local _maxreadlen
+
+local _checkinterval
+local _sendtimeout
+local _readtimeout
+
+local _cleanqueue
+
+local _timer
+
+local _maxclientsperserver
+
+----------------------------------// DEFINITION //--
+
+_server = { } -- key = port, value = table; list of listening servers
+_readlist = { } -- array with sockets to read from
+_sendlist = { } -- arrary with sockets to write to
+_timerlist = { } -- array of timer functions
+_socketlist = { } -- key = socket, value = wrapped socket (handlers)
+_readtimes = { } -- key = handler, value = timestamp of last data reading
+_writetimes = { } -- key = handler, value = timestamp of last data writing/sending
+_closelist = { } -- handlers to close
+
+_readlistlen = 0 -- length of readlist
+_sendlistlen = 0 -- length of sendlist
+_timerlistlen = 0 -- lenght of timerlist
+
+_sendtraffic = 0 -- some stats
+_readtraffic = 0
+
+_selecttimeout = 1 -- timeout of socket.select
+_sleeptime = 0 -- time to wait at the end of every loop
+
+_maxsendlen = 51000 * 1024 -- max len of send buffer
+_maxreadlen = 25000 * 1024 -- max len of read buffer
+
+_checkinterval = 1200000 -- interval in secs to check idle clients
+_sendtimeout = 60000 -- allowed send idle time in secs
+_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs
+
+_cleanqueue = false -- clean bufferqueue after using
+
+_maxclientsperserver = 1000
+
+_maxsslhandshake = 30 -- max handshake round-trips
+----------------------------------// PRIVATE //--
+
+wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server
+
+ maxconnections = maxconnections or _maxclientsperserver
+
+ local connections = 0
+
+ local dispatch, disconnect = listeners.onincoming, listeners.ondisconnect
+
+ local err
+
+ local ssl = false
+
+ if sslctx then
+ ssl = true
+ if not ssl_newcontext then
+ out_error "luasec not found"
+ ssl = false
+ end
+ if type( sslctx ) ~= "table" then
+ out_error "server.lua: wrong server sslctx"
+ ssl = false
+ end
+ local ctx;
+ ctx, err = ssl_newcontext( sslctx )
+ if not ctx then
+ err = err or "wrong sslctx parameters"
+ local file;
+ file = err:match("^error loading (.-) %(");
+ if file then
+ if file == "private key" then
+ file = sslctx.key or "your private key";
+ elseif file == "certificate" then
+ file = sslctx.certificate or "your certificate file";
+ end
+ local reason = err:match("%((.+)%)$") or "some reason";
+ if reason == "Permission denied" then
+ reason = "Check that the permissions allow Prosody to read this file.";
+ elseif reason == "No such file or directory" then
+ reason = "Check that the path is correct, and the file exists.";
+ elseif reason == "system lib" then
+ reason = "Previous error (see logs), or other system error.";
+ else
+ reason = "Reason: "..tostring(reason or "unknown"):lower();
+ end
+ log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
+ else
+ log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err );
+ end
+ ssl = false
+ end
+ sslctx = ctx;
+ end
+ if not ssl then
+ sslctx = false;
+ if startssl then
+ log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport )
+ return nil, "Cannot start ssl, see log for details"
+ end
+ end
+
+ local accept = socket.accept
+
+ --// public methods of the object //--
+
+ local handler = { }
+
+ handler.shutdown = function( ) end
+
+ handler.ssl = function( )
+ return ssl
+ end
+ handler.sslctx = function( )
+ return sslctx
+ end
+ handler.remove = function( )
+ connections = connections - 1
+ end
+ handler.close = function( )
+ for _, handler in pairs( _socketlist ) do
+ if handler.serverport == serverport then
+ handler.disconnect( handler, "server closed" )
+ handler:close( true )
+ end
+ end
+ socket:close( )
+ _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
+ _readlistlen = removesocket( _readlist, socket, _readlistlen )
+ _socketlist[ socket ] = nil
+ handler = nil
+ socket = nil
+ --mem_free( )
+ out_put "server.lua: closed server handler and removed sockets from list"
+ end
+ handler.ip = function( )
+ return ip
+ end
+ handler.serverport = function( )
+ return serverport
+ end
+ handler.socket = function( )
+ return socket
+ end
+ handler.readbuffer = function( )
+ if connections > maxconnections then
+ out_put( "server.lua: refused new client connection: server full" )
+ return false
+ end
+ local client, err = accept( socket ) -- try to accept
+ if client then
+ local ip, clientport = client:getpeername( )
+ client:settimeout( 0 )
+ local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket
+ if err then -- error while wrapping ssl socket
+ return false
+ end
+ connections = connections + 1
+ out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))
+ return dispatch( handler )
+ elseif err then -- maybe timeout or something else
+ out_put( "server.lua: error with new client connection: ", tostring(err) )
+ return false
+ end
+ end
+ return handler
+end
+
+wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object
+
+ socket:settimeout( 0 )
+
+ --// local import of socket methods //--
+
+ local send
+ local receive
+ local shutdown
+
+ --// private closures of the object //--
+
+ local ssl
+
+ local dispatch = listeners.onincoming
+ local status = listeners.status
+ local disconnect = listeners.ondisconnect
+
+ 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
+ end
+ handler.getstats = function( )
+ return readtraffic, sendtraffic
+ end
+ handler.ssl = function( )
+ return ssl
+ end
+ handler.sslctx = function ( )
+ return sslctx
+ end
+ handler.send = function( _, data, i, j )
+ return send( socket, data, i, j )
+ end
+ handler.receive = function( pattern, prefix )
+ return receive( socket, pattern, prefix )
+ end
+ handler.shutdown = function( pattern )
+ return shutdown( socket, pattern )
+ end
+ handler.close = function( 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.pattern = 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
+ 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.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") or string_len(part) > 0 then -- received something
+ local buffer = buffer or part or ""
+ local len = string_len( buffer )
+ if len > maxreadlen then
+ disconnect( handler, "receive buffer exceeded" )
+ handler.close( true )
+ return false
+ end
+ local count = len * STAT_UNIT
+ readtraffic = readtraffic + count
+ _readtraffic = _readtraffic + count
+ _readtimes[ handler ] = _currenttime
+ --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )
+ return dispatch( handler, buffer, err )
+ else -- connections was closed or fatal error
+ out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )
+ fatalerror = true
+ disconnect( handler, err )
+ _ = handler and handler.close( )
+ return false
+ end
+ end
+ local _sendbuffer = function( ) -- this function sends data
+ local succ, err, byte, buffer, count;
+ local count;
+ if socket then
+ buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )
+ succ, err, byte = send( socket, buffer, 1, bufferlen )
+ count = ( succ or byte or 0 ) * STAT_UNIT
+ sendtraffic = sendtraffic + count
+ _sendtraffic = _sendtraffic + count
+ _ = _cleanqueue and clean( bufferqueue )
+ --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )
+ else
+ succ, err, count = false, "closed", 0;
+ end
+ if succ then -- sending succesful
+ bufferqueuelen = 0
+ bufferlen = 0
+ _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist
+ _ = needtls and handler:starttls(true)
+ _writetimes[ handler ] = nil
+ _ = toclose and handler.close( )
+ return true
+ elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
+ buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer
+ bufferqueue[ 1 ] = buffer -- insert new buffer in queue
+ bufferqueuelen = 1
+ bufferlen = bufferlen - byte
+ _writetimes[ handler ] = _currenttime
+ return true
+ else -- connection was closed during sending or fatal error
+ out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )
+ fatalerror = true
+ disconnect( handler, err )
+ _ = handler and handler.close( )
+ return false
+ end
+ end
+
+ -- Set the sslctx
+ local handshake;
+ function handler.set_sslctx(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 sslctx then -- ssl?
+ handler:set_sslctx(sslctx);
+ if startssl then -- ssl now?
+ --out_put("server.lua: ", "starting ssl handshake")
+ local err
+ socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
+ if err then
+ out_put( "server.lua: ssl error: ", tostring(err) )
+ --mem_free( )
+ return nil, nil, err -- fatal error
+ end
+ socket:settimeout( 0 )
+ handler.readbuffer = handshake
+ handler.sendbuffer = handshake
+ handshake( socket ) -- do handshake
+ if not socket then
+ return nil, nil, "ssl handshake failed";
+ end
+ else
+ -- We're not automatically doing SSL, so we're not secure (yet)
+ ssl = false
+ handler.starttls = function( self, now )
+ if not now then
+ --out_put "server.lua: we need to do tls, but delaying until later"
+ needtls = true
+ return
+ end
+ --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )
+ local oldsocket, err = socket
+ socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
+ --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) )
+ if err then
+ out_put( "server.lua: error while starting tls on client: ", tostring(err) )
+ return nil, err -- fatal error
+ end
+
+ socket:settimeout( 0 )
+
+ -- add the new socket to our system
+
+ send = socket.send
+ receive = socket.receive
+ shutdown = id
+
+ _socketlist[ socket ] = handler
+ _readlistlen = addsocket(_readlist, socket, _readlistlen)
+
+ -- remove traces of the old socket
+
+ _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )
+ _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )
+ _socketlist[ oldsocket ] = nil
+
+ handler.starttls = nil
+ needtls = nil
+
+ -- Secure now
+ ssl = true
+
+ handler.readbuffer = handshake
+ handler.sendbuffer = handshake
+ handshake( socket ) -- do handshake
+ end
+ handler.readbuffer = _readbuffer
+ handler.sendbuffer = _sendbuffer
+ end
+ else -- normal connection
+ ssl = false
+ handler.readbuffer = _readbuffer
+ handler.sendbuffer = _sendbuffer
+ end
+
+ send = socket.send
+ receive = socket.receive
+ shutdown = ( ssl and id ) or socket.shutdown
+
+ _socketlist[ socket ] = handler
+ _readlistlen = addsocket(_readlist, socket, _readlistlen)
+
+ return handler, socket
+end
+
+id = function( )
+end
+
+idfalse = function( )
+ return false
+end
+
+addsocket = function( list, socket, len )
+ if not list[ socket ] then
+ len = len + 1
+ list[ len ] = socket
+ list[ socket ] = len
+ end
+ return len;
+end
+
+removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )
+ local pos = list[ socket ]
+ if pos then
+ list[ socket ] = nil
+ local last = list[ len ]
+ list[ len ] = nil
+ if last ~= socket then
+ list[ last ] = pos
+ list[ pos ] = last
+ end
+ return len - 1
+ end
+ return len
+end
+
+closesocket = function( socket )
+ _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
+ _readlistlen = removesocket( _readlist, socket, _readlistlen )
+ _socketlist[ socket ] = nil
+ socket:close( )
+ --mem_free( )
+end
+
+----------------------------------// PUBLIC //--
+
+addserver = function( addr, port, listeners, pattern, sslctx, startssl ) -- this function provides a way for other scripts to reg a server
+ local err
+ --out_put("server.lua: autossl on ", port, " is ", startssl)
+ if type( listeners ) ~= "table" then
+ err = "invalid listener table"
+ end
+ if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then
+ err = "invalid port"
+ elseif _server[ port ] then
+ err = "listeners on port '" .. port .. "' already exist"
+ elseif sslctx and not luasec then
+ err = "luasec not found"
+ end
+ if err then
+ out_error( "server.lua, port ", port, ": ", err )
+ return nil, err
+ end
+ addr = addr or "*"
+ local server, err = socket_bind( addr, port )
+ if err then
+ out_error( "server.lua, port ", port, ": ", err )
+ return nil, err
+ end
+ local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver, startssl ) -- wrap new server socket
+ if not handler then
+ server:close( )
+ return nil, err
+ end
+ server:settimeout( 0 )
+ _readlistlen = addsocket(_readlist, server, _readlistlen)
+ _server[ port ] = handler
+ _socketlist[ server ] = handler
+ out_put( "server.lua: new server listener on '", addr, ":", port, "'" )
+ return handler
+end
+
+getserver = function ( port )
+ return _server[ port ];
+end
+
+removeserver = function( port )
+ local handler = _server[ port ]
+ if not handler then
+ return nil, "no server found on port '" .. tostring( port ) .. "'"
+ end
+ handler:close( )
+ _server[ port ] = nil
+ return true
+end
+
+closeall = function( )
+ for _, handler in pairs( _socketlist ) do
+ handler:close( )
+ _socketlist[ _ ] = nil
+ end
+ _readlistlen = 0
+ _sendlistlen = 0
+ _timerlistlen = 0
+ _server = { }
+ _readlist = { }
+ _sendlist = { }
+ _timerlist = { }
+ _socketlist = { }
+ --mem_free( )
+end
+
+getsettings = function( )
+ return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake
+end
+
+changesettings = function( new )
+ if type( new ) ~= "table" then
+ return nil, "invalid settings table"
+ end
+ _selecttimeout = tonumber( new.timeout ) or _selecttimeout
+ _sleeptime = tonumber( new.sleeptime ) or _sleeptime
+ _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen
+ _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen
+ _checkinterval = tonumber( new.checkinterval ) or _checkinterval
+ _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout
+ _readtimeout = tonumber( new.readtimeout ) or _readtimeout
+ _cleanqueue = new.cleanqueue
+ _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver
+ _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake
+ return true
+end
+
+addtimer = function( listener )
+ if type( listener ) ~= "function" then
+ return nil, "invalid listener function"
+ end
+ _timerlistlen = _timerlistlen + 1
+ _timerlist[ _timerlistlen ] = listener
+ return true
+end
+
+stats = function( )
+ return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen
+end
+
+local dontstop = true; -- thinking about tomorrow, ...
+
+setquitting = function (quit)
+ dontstop = not quit;
+ return;
+end
+
+loop = function( ) -- this is the main loop of the program
+ while dontstop do
+ local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout )
+ for i, socket in ipairs( write ) do -- send data waiting in writequeues
+ local handler = _socketlist[ socket ]
+ if handler then
+ handler.sendbuffer( )
+ else
+ closesocket( socket )
+ out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen
+ end
+ end
+ for i, socket in ipairs( read ) do -- receive data
+ local handler = _socketlist[ socket ]
+ if handler then
+ handler.readbuffer( )
+ else
+ closesocket( socket )
+ out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
+ end
+ end
+ for handler, err in pairs( _closelist ) do
+ handler.disconnect( )( handler, err )
+ handler:close( true ) -- forced disconnect
+ end
+ clean( _closelist )
+ _currenttime = os_time( )
+ if os_difftime( _currenttime - _timer ) >= 1 then
+ for i = 1, _timerlistlen do
+ _timerlist[ i ]( _currenttime ) -- fire timers
+ end
+ _timer = _currenttime
+ end
+ socket_sleep( _sleeptime ) -- wait some time
+ --collectgarbage( )
+ end
+ return "quitting"
+end
+
+--// EXPERIMENTAL //--
+
+local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl )
+ local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl )
+ _socketlist[ socket ] = handler
+ _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
+ return handler, socket
+end
+
+local addclient = function( address, port, listeners, pattern, sslctx, startssl )
+ local client, err = luasocket.tcp( )
+ if err then
+ return nil, err
+ end
+ client:settimeout( 0 )
+ _, err = client:connect( address, port )
+ if err then -- try again
+ local handler = wrapclient( client, address, port, listeners )
+ else
+ wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl )
+ end
+end
+
+--// EXPERIMENTAL //--
+
+----------------------------------// BEGIN //--
+
+use "setmetatable" ( _socketlist, { __mode = "k" } )
+use "setmetatable" ( _readtimes, { __mode = "k" } )
+use "setmetatable" ( _writetimes, { __mode = "k" } )
+
+_timer = os_time( )
+_starttime = os_time( )
+
+addtimer( function( )
+ local difftime = os_difftime( _currenttime - _starttime )
+ if difftime > _checkinterval then
+ _starttime = _currenttime
+ for handler, timestamp in pairs( _writetimes ) do
+ if os_difftime( _currenttime - timestamp ) > _sendtimeout then
+ --_writetimes[ handler ] = nil
+ handler.disconnect( )( handler, "send timeout" )
+ handler:close( true ) -- forced disconnect
+ end
+ end
+ for handler, timestamp in pairs( _readtimes ) do
+ if os_difftime( _currenttime - timestamp ) > _readtimeout then
+ --_readtimes[ handler ] = nil
+ handler.disconnect( )( handler, "read timeout" )
+ handler:close( ) -- forced disconnect?
+ end
+ end
+ end
+ end
+)
+
+----------------------------------// PUBLIC INTERFACE //--
+
+return {
+
+ addclient = addclient,
+ wrapclient = wrapclient,
+
+ loop = loop,
+ stats = stats,
+ closeall = closeall,
+ addtimer = addtimer,
+ addserver = addserver,
+ getserver = getserver,
+ getsettings = getsettings,
+ setquitting = setquitting,
+ removeserver = removeserver,
+ changesettings = changesettings,
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 20:14:35 +0000