From fb96f1daa8721562a4ed8c1bce7e47e4aa549149 Mon Sep 17 00:00:00 2001
From: toby <toby@wit.com>
Date: Thu, 21 Feb 2019 01:02:35 +0000
Subject: [PATCH] adding more resiliancy to the ifup-public script. we want it
 to maybe fail if it doesn't know what to do with the variable. not just
 silently continue

---
 files/qemu-ifup-public | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/files/qemu-ifup-public b/files/qemu-ifup-public
index 36e2d27..eea116e 100755
--- a/files/qemu-ifup-public
+++ b/files/qemu-ifup-public
@@ -11,7 +11,7 @@ maxprefixv4=25
 
 if [ -z $IP ]; then
         echo "got nothing back from the API"
-	exit 10
+        exit 10
 fi
 
 eui64() {
@@ -45,7 +45,7 @@ for IP in "${IPS[@]}"; do
         fi
 
         echo "we got IPv4 with prefix ${BASH_REMATCH[0]}"
-	ip route add ${IP} dev ${IFACE}
+        ip route add ${IP} dev ${IFACE}
 
      elif [[ $IP =~ ^2604:bbc0:[0-9,a-f,:]{1,444}/([0-9]{2,3})$ ]]; then		### we got a PIv6 prefix < masprefixv6
 
@@ -60,9 +60,13 @@ for IP in "${IPS[@]}"; do
         fi
 
         echo "we got IPv6 with prefix ${BASH_REMATCH[0]}"
-	ip route add ${IP} dev ${IFACE} via $(eui64 $PUBLICMAC)
+        ip route add ${IP} dev ${IFACE} via $(eui64 $PUBLICMAC)
 
-     else										### don't know what we have but something we can't work with
+     elif [[ $IP =~ ^\ *$ ]]; then
+        echo "we just got an empty string. so not gonna do anything. probably due to splitting the comma"
+
+     else
         echo "Unable to detect with what prefix I'm working with"
+        exit 10
    fi
 done