From e546b15fde7e6b97729f5c90f9133af8c3e518cc Mon Sep 17 00:00:00 2001
From: Martin Lucina <martin@lucina.net>
Date: Tue, 20 Oct 2015 18:30:16 +0200
Subject: [PATCH] rumprun: Generate random MAC addresses for qemu/kvm

Each unikernel on kvm/qemu gets the same MAC address, making them
unusable in bridged configurations.
---
 app-tools/rumprun | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app-tools/rumprun b/app-tools/rumprun
index d224809..71a1305 100755
--- a/app-tools/rumprun
+++ b/app-tools/rumprun
@@ -159,8 +159,10 @@ createif_qemu ()
 	scratch="${1#*,}"
 	ifbasename="${scratch%%,*}"
 	qemuargs="${scratch#*,}"
+	# 52:54:00 is QEMU registered OUI
+	ifmac="52:54:00$(od -N 3 -A n -t x1 /dev/urandom | tr ' ' :)"
 
-	opt_netif="${opt_netif} -net nic,model=virtio ${qemuargs}"
+	opt_netif="${opt_netif} -net nic,model=virtio,macaddr=${ifmac} ${qemuargs}"
 	eval ${iftag}2ifname=${ifbasename}${nindex}
 	eval ${iftag}2cloner=false
 	nindex=$(expr $nindex + 1)
-- 
2.39.5