From 9a0a01274373ef5229ca5f0a27bf82b189033a24 Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng@yasker.org>
Date: Fri, 14 Apr 2017 15:24:59 -0700
Subject: [PATCH] Add IP validation

Prevent user from direct copy/paste
---
 deploy/common.sh               | 10 ++++++++++
 deploy/longhorn-deploy-node.sh |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/deploy/common.sh b/deploy/common.sh
index b50d71b..93a74f9 100644
--- a/deploy/common.sh
+++ b/deploy/common.sh
@@ -27,3 +27,13 @@ get_container_ip() {
     fi
     echo $ip
 }
+
+validate_ip() {
+    ip=$1
+    rx='([1-9]?[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])'
+    if [[ $ip =~ ^$rx\.$rx\.$rx\.$rx$ ]]; then
+        return 0
+    fi
+    echo Invalid ip address ${ip}
+    return 1
+}
diff --git a/deploy/longhorn-deploy-node.sh b/deploy/longhorn-deploy-node.sh
index c9e1c23..f10b53e 100755
--- a/deploy/longhorn-deploy-node.sh
+++ b/deploy/longhorn-deploy-node.sh
@@ -38,6 +38,9 @@ if [ "$etcd_ip" == "" ]; then
         exit 1
 fi
 
+# will error out if fail since we have set -e
+validate_ip ${etcd_ip}
+
 network_option=
 if [ "$network" != "" ]; then
         network_option="--network ${network}"