net.server*: Allow the TCP backlog parameter to be set in the config

[prosody.git] / net / server_select.lua

diff --git a/net/server_select.lua b/net/server_select.lua
index 28f1dc6da1f47db2589e026edb9a36efec0521fb..bdf262aef49123f642a3f4100efb35f030a6f353 100644 (file)
--- a/net/server_select.lua
+++ b/net/server_select.lua
@@ -101,6 +101,7 @@ local _readtraffic
 
 local _selecttimeout
 local _sleeptime
+local _tcpbacklog
 
 local _starttime
 local _currenttime
@@ -139,6 +140,7 @@ _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
 
 _maxsendlen = 51000 * 1024 -- max len of send buffer
 _maxreadlen = 25000 * 1024 -- max len of read buffer
@@ -211,7 +213,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t
        handler.resume = function( )
                if handler.paused then
                        if not socket then
-                               socket = socket_bind( ip, serverport );
+                               socket = socket_bind( ip, serverport, _tcpbacklog );
                                socket:settimeout( 0 )
                        end
                        _readlistlen = addsocket(_readlist, socket, _readlistlen)
@@ -720,7 +722,7 @@ addserver = function( addr, port, listeners, pattern, sslctx ) -- this function
                return nil, err
        end
        addr = addr or "*"
-       local server, err = socket_bind( addr, port )
+       local server, err = socket_bind( addr, port, _tcpbacklog )
        if err then
                out_error( "server.lua, [", addr, "]:", port, ": ", err )
                return nil, err
@@ -772,6 +774,7 @@ getsettings = function( )
        return {
                select_timeout = _selecttimeout;
                select_sleep_time = _sleeptime;
+               tcp_backlog = _tcpbacklog;
                max_send_buffer_size = _maxsendlen;
                max_receive_buffer_size = _maxreadlen;
                select_idle_check_interval = _checkinterval;
@@ -792,6 +795,7 @@ changesettings = function( new )
        _maxsendlen = tonumber( new.max_send_buffer_size ) or _maxsendlen
        _maxreadlen = tonumber( new.max_receive_buffer_size ) or _maxreadlen
        _checkinterval = tonumber( new.select_idle_check_interval ) or _checkinterval
+       _tcpbacklog = tonumber( new.tcp_backlog ) or _tcpbacklog
        _sendtimeout = tonumber( new.send_timeout ) or _sendtimeout
        _readtimeout = tonumber( new.read_timeout ) or _readtimeout
        _maxselectlen = new.max_connections or _maxselectlen