From 209e9dcd7b2f23b68ff93bf20fad025bc03219ac Mon Sep 17 00:00:00 2001
From: Susant Sahani <susant@redhat.com>
Date: Thu, 14 Aug 2014 23:06:11 +0530
Subject: socket: Add Support for TCP keep alive variables

The tcp keep alive variables now can be configured via conf
parameter. Follwing variables are now supported by this patch.

tcp_keepalive_intvl: The number of seconds between TCP keep-alive probes

tcp_keepalive_probes: The maximum number of TCP keep-alive probes to
send before giving up and killing the connection if no response is
obtained from the other end.

tcp_keepalive_time: The number of seconds a connection needs to be
idle before TCP begins sending out keep-alive probes.
---
 man/systemd.socket.xml | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

(limited to 'man')

diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml
index 352825f580..5efb398b09 100644
--- a/man/systemd.socket.xml
+++ b/man/systemd.socket.xml
@@ -487,6 +487,42 @@
                                 <option>false</option>.</para></listitem>
                         </varlistentry>
 
+                        <varlistentry>
+                                <term><varname>KeepAliveTime=</varname></term>
+                                <listitem><para>Takes time (in seconds) as argument . The connection needs to remain
+                                idle before TCP starts sending keepalive probes. This controls the TCP_KEEPIDLE
+                                socket option (see
+                                <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+                                and the <ulink
+                                url="http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/">TCP
+                                Keepalive HOWTO</ulink> for details.)
+                                Defaults value is 7200 seconds (2 hours).</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>KeepAliveInterval=</varname></term>
+                                <listitem><para>Takes time (in seconds) as argument between individual keepalive probes,
+                                if the socket option SO_KEEPALIVE has  been set on this socket seconds as argument.
+                                This controls the TCP_KEEPINTVL socket option (see
+                                <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+                                and the <ulink
+                                url="http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/">TCP
+                                Keepalive HOWTO</ulink> for details.)
+                                Defaults value is 75 seconds.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>KeepAliveProbes=</varname></term>
+                                <listitem><para>Takes interger as argument. It's the number of unacknowledged probes to
+                                send before considering the connection dead and notifying the application layer.
+                                This controls the TCP_KEEPCNT socket option (see
+                                <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
+                                and the <ulink
+                                url="http://www.tldp.org/HOWTO/html_single/TCP-Keepalive-HOWTO/">TCP
+                                Keepalive HOWTO</ulink> for details.)
+                                Defaults value is 9.</para></listitem>
+                        </varlistentry>
+
                         <varlistentry>
                                 <term><varname>NoDelay=</varname></term>
                                 <listitem><para>Takes a boolean
-- 
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