diff options
Diffstat (limited to 'net/server_select.lua')
| -rw-r--r-- | net/server_select.lua | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/net/server_select.lua b/net/server_select.lua index 7ac41523..c50a6ce1 100644 --- a/net/server_select.lua +++ b/net/server_select.lua @@ -88,6 +88,7 @@ local _socketlist local _closelist local _readtimes local _writetimes +local _fullservers --// simple data types //-- @@ -102,6 +103,7 @@ local _readtraffic local _selecttimeout local _sleeptime local _tcpbacklog +local _accepretry local _starttime local _currenttime @@ -130,6 +132,7 @@ _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 +_fullservers = { } -- servers in a paused state while there are too many clients _readlistlen = 0 -- length of readlist _sendlistlen = 0 -- length of sendlist @@ -141,6 +144,7 @@ _readtraffic = 0 _selecttimeout = 1 -- timeout of socket.select _sleeptime = 0 -- time to wait at the end of every loop _tcpbacklog = 128 -- some kind of hint to the OS +_accepretry = 10 -- seconds to wait until the next attempt of a full server to accept _maxsendlen = 51000 * 1024 -- max len of send buffer _maxreadlen = 25000 * 1024 -- max len of read buffer @@ -209,6 +213,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t socket = nil; end handler.paused = true; + out_put("server.lua: server [", ip, "]:", serverport, " paused") end end handler.resume = function( ) @@ -219,7 +224,9 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t end _readlistlen = addsocket(_readlist, socket, _readlistlen) _socketlist[ socket ] = handler + _fullservers[ handler ] = nil handler.paused = false; + out_put("server.lua: server [", ip, "]:", serverport, " resumed") end end handler.ip = function( ) @@ -234,6 +241,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t handler.readbuffer = function( ) if _readlistlen >= _maxselectlen or _sendlistlen >= _maxselectlen then handler.pause( ) + _fullservers[ handler ] = _currenttime out_put( "server.lua: refused new client connection: server full" ) return false end @@ -252,6 +260,8 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t return; elseif err then -- maybe timeout or something else out_put( "server.lua: error with new client connection: ", tostring(err) ) + handler.pause( ) + _fullservers[ handler ] = _currenttime return false end end @@ -264,6 +274,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport out_error("server.lua: Disallowed FD number: "..socket:getfd()) -- PROTIP: Switch to libevent socket:close( ) -- Should we send some kind of error here? if server then + _fullservers[ server ] = _currenttime server.pause( ) end return nil, nil, "fd-too-large" @@ -793,6 +804,7 @@ getsettings = function( ) max_connections = _maxselectlen; max_ssl_handshake_roundtrips = _maxsslhandshake; highest_allowed_fd = _maxfd; + accept_retry_interval = _accepretry; } end @@ -808,6 +820,7 @@ changesettings = function( new ) _tcpbacklog = tonumber( new.tcp_backlog ) or _tcpbacklog _sendtimeout = tonumber( new.send_timeout ) or _sendtimeout _readtimeout = tonumber( new.read_timeout ) or _readtimeout + _accepretry = tonumber( new.accept_retry_interval ) or _accepretry _maxselectlen = new.max_connections or _maxselectlen _maxsslhandshake = new.max_ssl_handshake_roundtrips or _maxsslhandshake _maxfd = new.highest_allowed_fd or _maxfd @@ -896,6 +909,13 @@ loop = function(once) -- this is the main loop of the program next_timer_time = next_timer_time - (_currenttime - _timer); end + for server, paused_time in pairs( _fullservers ) do + if _currenttime - paused_time > _accepretry then + _fullservers[ server ] = nil; + server.resume(); + end + end + -- wait some time (0 by default) socket_sleep( _sleeptime ) until quitting; |