Commit dab38303 authored by Marc Slemko's avatar Marc Slemko
Browse files

Add ListenBacklog directive to control the backlog passed to listen(). 

Also change the default to 511 for platforms that use an 8-bit datatype
to store it.

A slightly different implementation than suggested by Taso Devetzis
<devetzis@snet.net>, who submitted the PR.

PR: 240
Reviewed by:	Dean Gaudet, Jim Jagielski
Submitted by:
Obtained from:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@78428 13f79535-47bb-0310-9956-ffa450edef68
parent 9bd91f04

docs/manual/mod/core.html

+14 −0
Changes for docs/manual/mod/core.html: 14 added lines, 0 removed lines.
Original line number Diff line number Diff line
@@ -43,6 +43,7 @@ always available. 
<li><A HREF="#keepalivetimeout">KeepAliveTimeout</A>

<li><A HREF="#limit">&lt;Limit&gt;</A>

<li><A HREF="#listen">Listen</A>

<li><A HREF="#listenbacklog">ListenBacklog</A>

<li><A HREF="#location">&lt;Location&gt;</A>

<li><A HREF="#maxclients">MaxClients</A>

<li><A HREF="#maxkeepaliverequests">MaxKeepAliveRequests</a>
@@ -658,6 +659,19 @@ directive.</p> 
<a href="../misc/known_bugs.html#listenbug">Known Bugs</a></p>

<hr>



<A NAME="listenbacklog"<H2>ListenBacklog</H2></A>

<strong>Syntax:</strong> ListenBacklog <em>backlog</em><br>

<strong>Default:</strong> <code>ListenBacklog 511</code><br>

<strong>Context:</strong> server config<br>

<strong>Status:</strong> Core<br>

<strong>Compatibility:</strong> ListenBacklog is only available in Apache

versions after 1.2.0.<p>



The maximum length of the queue of pending connections.  Generally no

tuning is needed or desired, however on some systems it is desirable

to increase this when under a TCP SYN flood attack.  See 

the backlog parameter to the <code>listen(2)</code> system call.



<A name="limit"><h2>&lt;Limit&gt; directive</h2></A>

<!--%plaintext &lt;?INDEX {\tt Limit} section directive&gt; -->

<strong>Syntax:</strong>

docs/manual/mod/directives.html

+1 −0
Changes for docs/manual/mod/directives.html: 1 added line, 0 removed lines.
Original line number Diff line number Diff line
@@ -103,6 +103,7 @@ 
<li><A HREF="mod_negotiation.html#languagepriority">LanguagePriority</A>

<li><A HREF="core.html#limit">&lt;Limit&gt;</A>

<li><A HREF="core.html#listen">Listen</A>

<li><A HREF="core.html#listenbacklog">ListenBacklog</A>

<li><A HREF="mod_dld.html#loadfile">LoadFile</A>

<li><A HREF="mod_dld.html#loadmodule">LoadModule</A>

<li><A HREF="core.html#location">&lt;Location&gt;</A>