Extend legacy script to assign a static ip address to a new client

README.md

@@ -12,9 +12,37 @@ Run the script and follow the assistant:
 
 Once it ends, you can run it again to add more users, remove some of them or even completely uninstall OpenVPN.
 
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-
-### Donations
-
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+### Extended
+This script has been extended to automatically assign a static ip address to a client.
+All static ip addresses are stored in ccd directory and the ipp.txt file.
+To use static ip routing follow stpes below
+1. Create folder with name ccd where static ip addresses will be stored:
+	mkdir /etc/openvpn/server/ccd
+2. Change server.conf configuration file.
+	Add line: client-config-dir /etc/openvpn/server/ccd
+	Remove line: ifconfig-pool-persist ipp.txt
+	Change subnet mask: server 10.8.0.0 255.255.0.0
+3. Run ipPoolMigration.sh script to create static ip addreses for existing users.
+	sudo ./ipPoolMigration.sh
+4. Restart openvpn server
+	sudo systemctl restart openvpn-server@server
+
+To add a new client run openvpn-ubuntu-install.sh script. It will
+automatically give static ip to a client.
+Don't delete ipp.txt. All ip addresses are stored there.
+
+To add or change static ip manually:
+1. Create file with a profile name in ccd directody:
+	touch /etc/openvpn/server/ccd/client1
+2. Add `ifconfig-push {ip} {subnet_mask}` command to the file. ex:
+	ifconfig-push 10.8.0.236 255.255.0.0
+3. Add profile name and ip address to ipp.txt file in following format:
+	client1,10.8.0.236
+
+You should not restart openvpn server after adding static ip address.
+
+### Info
+You can find more info about static ip routing and how to use it below
+
+https://openvpn.net/community-resources/configuring-client-specific-rules-and-access-policies/
+https://kifarunix.com/assign-static-ip-addresses-for-openvpn-clients/

ipPoolMigration.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+ip_pool="/etc/openvpn/server/ipp.txt"
+
+while IFS="," read -ra line; do
+	name="${line[0]}"
+	address="${line[1]}"
+
+	echo "ifconfig-push $address 255.255.0.0" > /etc/openvpn/server/ccd/$name
+done <"$ip_pool"

openvpn-install.sh

@@ -96,6 +96,28 @@ new_client () {
 	sed -ne '/BEGIN OpenVPN Static key/,$ p' /etc/openvpn/server/tc.key
 	echo "</tls-crypt>"
 	} > ~/"$client".ovpn
+
+	# add address to ccd
+	last_address=$(grep -oE '\b[0-9]{1,3}(\.[0-9]{1,3}){3}\b' /etc/openvpn/server/ipp.txt |
+		      sort -t . -k 3,3n -k 4,4n |
+		      tail -n1
+		      )
+	IFS="." read -ra array <<< "$last_address"
+
+	if [[ ${array[3]} -gt 253 ]]; then
+		array[3]=0
+		let next=${array[2]}+1
+		array[2]=$next
+	else
+		let next=${array[3]}+1
+		array[3]=$next
+	fi
+
+	printf -v new_ip "%s." "${array[@]}"
+	new_ip=${new_ip%?}
+	echo "$client,$new_ip" >> /etc/openvpn/server/ipp.txt
+	echo "ifconfig-push $new_ip 255.255.0.0" >> /etc/openvpn/server/ccd/"$client"
+	#don't give last 2 addresses (10.8.254.253 - 10.8.254.254)
 }
 
 if [[ ! -e /etc/openvpn/server/server.conf ]]; then