add up and down .sh

doc/source/devref/cloudpipe.rst

@@ -50,6 +50,18 @@ Making a cloudpipe image is relatively easy.
    :language: bash
    :linenos:
 
+# set up.sh in /etc/openvpn/
+
+.. literalinclude:: up.sh
+   :language: bash
+   :linenos:
+
+# set down.sh in /etc/openvpn/
+
+.. literalinclude:: down.sh
+   :language: bash
+   :linenos:
+
 # download and run the payload on boot from /etc/rc.local.
 
 .. literalinclude:: rc.local

doc/source/down.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+BR=$1
+DEV=$2
+
+/usr/sbin/brctl delif $BR $DEV
+/sbin/ifconfig $DEV down

doc/source/up.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+
+BR=$1
+DEV=$2
+MTU=$3
+/sbin/ifconfig $DEV mtu $MTU promisc up
+/usr/sbin/brctl addif $BR $DEV