From aea1cd3cb730117967c9671aa50f68d2b241c39e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phane=20Graber?= <stgraber@ubuntu.com>
Date: Wed, 23 Oct 2013 19:59:22 -0400
Subject: [PATCH] lxc-debian: Add hwaddr handling logic
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Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
---
 templates/lxc-debian.in | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/templates/lxc-debian.in b/templates/lxc-debian.in
index 4dd491026..645fe8d73 100644
--- a/templates/lxc-debian.in
+++ b/templates/lxc-debian.in
@@ -207,6 +207,13 @@ copy_configuration()
     hostname=$3
     arch=$4
 
+    # if there is exactly one veth network entry, make sure it has an
+    # associated hwaddr.
+    nics=`grep -e '^lxc\.network\.type[ \t]*=[ \t]*veth' $path/config | wc -l`
+    if [ $nics -eq 1 ]; then
+        grep -q "^lxc.network.hwaddr" $path/config || sed -i -e "/^lxc\.network\.type[ \t]*=[ \t]*veth/a lxc.network.hwaddr = 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')" $path/config
+    fi
+
     grep -q "^lxc.rootfs" $path/config 2>/dev/null || echo "lxc.rootfs = $rootfs" >> $path/config
     cat <<EOF >> $path/config
 lxc.tty = 4