diff options
Diffstat (limited to 'net/server_select.lua')
| -rw-r--r-- | net/server_select.lua | 75 |
1 files changed, 40 insertions, 35 deletions
diff --git a/net/server_select.lua b/net/server_select.lua index 0852d444..63a94b7e 100644 --- a/net/server_select.lua +++ b/net/server_select.lua @@ -10,11 +10,6 @@ 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 @@ -47,7 +42,6 @@ local os_difftime = os.difftime local math_min = math.min local math_huge = math.huge local table_concat = table.concat -local string_len = string.len local string_sub = string.sub local coroutine_wrap = coroutine.wrap local coroutine_yield = coroutine.yield @@ -118,11 +112,10 @@ local _checkinterval local _sendtimeout local _readtimeout -local _cleanqueue - local _timer -local _maxclientsperserver +local _maxselectlen +local _maxfd local _maxsslhandshake @@ -154,17 +147,20 @@ _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 +_maxfd = luasocket._SETSIZE or 1024 -- We should ignore this on Windows. Perhaps by simply setting it to math.huge or something. +_maxselectlen = luasocket._SETSIZE or 1024 -- But this still applies on Windows _maxsslhandshake = 30 -- max handshake round-trips ----------------------------------// PRIVATE //-- -wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections ) -- this function wraps a server +wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- this function wraps a server -- FIXME Make sure FD < _maxfd - maxconnections = maxconnections or _maxclientsperserver + if socket:getfd() >= _maxfd then + out_error("server.lua: Disallowed FD number: "..socket:getfd()) + socket:close() + return nil, "fd-too-large" + end local connections = 0 @@ -201,20 +197,23 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxco --mem_free( ) out_put "server.lua: closed server handler and removed sockets from list" end - handler.pause = function() + handler.pause = function( hard ) if not handler.paused then - socket:close( ) - _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _socketlist[ socket ] = nil - socket = nil; + if hard then + _socketlist[ socket ] = nil + socket:close( ) + socket = nil; + end handler.paused = true; end end - handler.resume = function() + handler.resume = function( ) if handler.paused then - socket = socket_bind( ip, serverport ); - socket:settimeout( 0 ) + if not socket then + socket = socket_bind( ip, serverport ); + socket:settimeout( 0 ) + end _readlistlen = addsocket(_readlist, socket, _readlistlen) _socketlist[ socket ] = handler handler.paused = false; @@ -230,7 +229,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxco return socket end handler.readbuffer = function( ) - if connections > maxconnections then + if _readlistlen >= _maxselectlen or _sendlistlen >= _maxselectlen then handler.pause( ) out_put( "server.lua: refused new client connection: server full" ) return false @@ -258,6 +257,12 @@ end wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx ) -- this function wraps a client to a handler object + if socket:getfd() >= _maxfd then + out_error("server.lua: Disallowed FD number: "..socket:getfd()) -- PROTIP: Switch to libevent + socket:close( ) -- Should we send some kind of error here? + server.pause( ) + return nil, nil, "fd-too-large" + end socket:settimeout( 0 ) --// local import of socket methods //-- @@ -335,9 +340,6 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport handler.force_close = function ( self, err ) if bufferqueuelen ~= 0 then out_put("server.lua: discarding unwritten data for ", tostring(ip), ":", tostring(clientport)) - for i = bufferqueuelen, 1, -1 do - bufferqueue[i] = nil; - end bufferqueuelen = 0; end return self:close(err); @@ -391,7 +393,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport return clientport end local write = function( self, data ) - bufferlen = bufferlen + string_len( data ) + bufferlen = bufferlen + #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 @@ -473,7 +475,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern" if not err or (err == "wantread" or err == "timeout") then -- received something local buffer = buffer or part or "" - local len = string_len( buffer ) + local len = #buffer if len > maxreadlen then handler:close( "receive buffer exceeded" ) return false @@ -499,7 +501,9 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport count = ( succ or byte or 0 ) * STAT_UNIT sendtraffic = sendtraffic + count _sendtraffic = _sendtraffic + count - _ = _cleanqueue and clean( bufferqueue ) + for i = bufferqueuelen,1,-1 do + bufferqueue[ i ] = nil + end --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, "unexpected close", 0; @@ -721,7 +725,7 @@ addserver = function( addr, port, listeners, pattern, sslctx ) -- this function out_error( "server.lua, [", addr, "]:", port, ": ", err ) return nil, err end - local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver ) -- wrap new server socket + local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx ) -- wrap new server socket if not handler then server:close( ) return nil, err @@ -765,7 +769,7 @@ closeall = function( ) end getsettings = function( ) - return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake + return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, nil, _maxselectlen, _maxsslhandshake, _maxfd end changesettings = function( new ) @@ -779,9 +783,9 @@ changesettings = function( new ) _checkinterval = tonumber( new.select_idle_check_interval ) or _checkinterval _sendtimeout = tonumber( new.send_timeout ) or _sendtimeout _readtimeout = tonumber( new.read_timeout ) or _readtimeout - _cleanqueue = new.select_clean_queue - _maxclientsperserver = new.max_connections or _maxclientsperserver + _maxselectlen = new.max_connections or _maxselectlen _maxsslhandshake = new.max_ssl_handshake_roundtrips or _maxsslhandshake + _maxfd = new.highest_allowed_fd or _maxfd return true end @@ -831,8 +835,8 @@ loop = function(once) -- this is the main loop of the program for handler, err in pairs( _closelist ) do handler.disconnect( )( handler, err ) handler:force_close() -- forced disconnect + _closelist[ handler ] = nil; end - clean( _closelist ) _currenttime = luasocket_gettime( ) if _currenttime - _timer >= math_min(next_timer_time, 1) then next_timer_time = math_huge; @@ -862,7 +866,8 @@ end --// EXPERIMENTAL //-- local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx ) - local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx ) + local handler, socket, err = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx ) + if not handler then return nil, err end _socketlist[ socket ] = handler if not sslctx then _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) |