local _closelist
local _readtimes
local _writetimes
+local _fullservers
--// simple data types //--
local _selecttimeout
local _tcpbacklog
+local _accepretry
local _starttime
local _currenttime
_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
_selecttimeout = 1 -- timeout of socket.select
_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
socket = nil;
end
handler.paused = true;
+ out_put("server.lua: server [", ip, "]:", serverport, " paused")
end
end
handler.resume = function( )
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( )
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
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
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"
max_connections = _maxselectlen;
max_ssl_handshake_roundtrips = _maxsslhandshake;
highest_allowed_fd = _maxfd;
+ accept_retry_interval = _accepretry;
}
end
_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
_currenttime = luasocket_gettime( )
repeat
-- Fire timers
- local next_timer_time = math_huge;
+ local next_timer_time = math_huge;
for i = 1, _timerlistlen do
local t = _timerlist[ i ]( _currenttime ) -- fire timers
if t then next_timer_time = math_min(next_timer_time, t); end
end
local read, write, err = socket_select( _readlist, _sendlist, math_min(_selecttimeout, next_timer_time) )
- for i, socket in ipairs( write ) do -- send data waiting in writequeues
+ for _, socket in ipairs( write ) do -- send data waiting in writequeues
local handler = _socketlist[ socket ]
if handler then
handler.sendbuffer( )
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
+ for _, socket in ipairs( read ) do -- receive data
local handler = _socketlist[ socket ]
if handler then
handler.readbuffer( )
end
end
end
+
+ for server, paused_time in pairs( _fullservers ) do
+ if _currenttime - paused_time > _accepretry then
+ _fullservers[ server ] = nil;
+ server.resume();
+ end
+ end
until quitting;
if once and quitting == "once" then quitting = nil; return; end
closeall();