More swping changes

git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@9356 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb

docs/MultiISP.xml

@@ -640,14 +640,22 @@
         place to start.</para>
       </important>
 
+      <para>The script should be copied to a directory on root's PATH such as
+      <filename>/usr/local/sbin/.</filename></para>
+
       <para>The script monitors two interfaces but it is a trivial exercise to
       extend it to more than two. At the top are a number of variables to
       set:</para>
 
-      <programlisting># The commands to run when the status of a line changes. Both commands will be executed.
+      <programlisting>#
+# IP family -- 4 or 6
 #
-COMMAND1=
-COMMAND2="ip -4 route ls"
+FAMILY=4
+#
+# The commands to run when the status of a line changes. Both commands will be executed.
+#
+COMMANDA=
+COMMANDB="ip -$FAMILY route ls"
 ...
 #
 # Interfaces to monitor -- you may use shell variables from your params file
@@ -676,7 +684,7 @@ UP_COUNT=5
 #
 DOWN_COUNT=2</programlisting>
 
-      <para>If you leave COMMAND1 empty, the script sets its value
+      <para>If you leave COMMANDA empty, the script sets its value
       automatically depending on whether Shorewall-lite is installed.</para>
 
       <para>When the status of an interface changes:</para>
@@ -722,11 +730,28 @@ return $status</programlisting></para>
       on <trademark>OpenSuSE</trademark> 11.0 -- YMMV. Modify the PROG and
       STATEDIR variables as needed.</para>
 
+      <para>As an alternative to using the init script, you can add the
+      following to <filename>/etc/shorewall/started</filename>:</para>
+
+      <programlisting>if [ "$COMMAND" = start ]; then
+   killall -9 swping 2&gt; /dev/null #be sure that there are none left running
+   /usr/local/sbin/swping &amp;
+fi</programlisting>
+
+      <para>and add this to
+      <filename>/etc/shorewall/stopped</filename>.</para>
+
+      <para><programlisting>if [ "$COMMAND" = stop -o "$COMMAND" = clear ]; then
+   killall -9 swping 2&gt; /dev/null
+fi</programlisting></para>
+
       <para>This simple script has a number of limitations:</para>
 
       <orderedlist>
         <listitem>
-          <para>It only works on IPv4 (but is easy to modify for IPv6)</para>
+          <para>It only works on IPv4 or IPv6 but not both at once. So if you
+          want to monitor both IPv4 and IPv6, you need to clone the script are
+          run two copies; one for IPv4 and one for IPv6.</para>
         </listitem>
 
         <listitem>
@@ -744,7 +769,7 @@ return $status</programlisting></para>
         </listitem>
 
         <listitem>
-          <para>It is tricky to configure a system such that a system works
+          <para>It is tricky to configure a system such that the system works
           correctly when one of its providers is down unless you largely don't
           care which interface is used.</para>
         </listitem>