From ba2527d67b010dd8d647bc2287d0eec05d74e12b Mon Sep 17 00:00:00 2001
From: Orazio <22700499+orazioedoardo@users.noreply.github.com>
Date: Sat, 25 Dec 2021 14:51:56 +0100
Subject: [PATCH] Fix vpnGW variable creation when pivpnNET was 10.X.0.0 or
 10.0.0.0

Bash built-in substitution doesn't work in those cases, example:

$ pivpnNET=10.34.0.0
$ vpnGw="${pivpnNET/.0/.1}"
$ echo $vpnGw
10.34.1.0
---
 auto_install/install.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/auto_install/install.sh b/auto_install/install.sh
index 32a8419..177deb8 100755
--- a/auto_install/install.sh
+++ b/auto_install/install.sh
@@ -1122,7 +1122,7 @@ setOpenVPNDefaultVars(){
 		if [ -z "$pivpnNET" ]; then
 			pivpnNET="$(generateRandomSubnet)"
 		fi
-		vpnGw="${pivpnNET/.0/.1}"
+		vpnGw="$(cut -d '.' -f 1-3 <<< "${pivpnNET}").1"
 }
 
 setWireguardDefaultVars(){
@@ -1134,7 +1134,7 @@ setWireguardDefaultVars(){
 		if [ -z "$pivpnNET" ]; then
 			pivpnNET="$(generateRandomSubnet)"
 		fi
-		vpnGw="${pivpnNET/.0/.1}"
+		vpnGw="$(cut -d '.' -f 1-3 <<< "${pivpnNET}").1"
 		# Allow custom allowed IPs via unattend setupVARs file. Use default if not provided.
 		if [ -z "$ALLOWED_IPS" ]; then
 			# Forward all traffic through PiVPN (i.e. full-tunnel), may be modified by