feat: added shell script to update dynamic dns records

addons/dynamic_dns_client.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Change these values
+login='username'
+password='password'
+domain='mydynamicdns.example.com'
+poweradmin_url='https://www.example.com/poweradmin'
+ip_lookup_url="$poweradmin_url/addons/clientip.php"
+verbose=1
+
+validate_ip() {
+    if [[ $1 =~ ^([0-9a-fA-F]{0,4}:){2}([0-9a-fA-F]{0,4}:){0,5}[0-9a-fA-F]{0,4}$|^([0-9]{1,3}\.){3}[0-9]{1,3}$ ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+ip_address=$(curl -s "$ip_lookup_url")
+if [ $? -ne 0 ] || [ -z "$ip_address" ]; then
+    echo "Error: Could not get your global IP address!"
+    exit 1
+fi
+
+if ! validate_ip "$ip_address"; then
+    echo "Error: Invalid global IP address! Check if Poweradmin url is correct"
+    exit 1
+fi
+
+[ $verbose -eq 1 ] && echo "Updating the IP address ($ip_address) now ..."
+
+auth_url=$(echo "$poweradmin_url" | sed "s#^http[s]*://#&$login:$password@#")
+
+response=$(curl -s "$auth_url/dynamic_update.php?hostname=$domain&myip=$ip_address&verbose=$verbose")
+if [ $? -ne 0 ] || [ -z "$response" ]; then
+    echo "Error: Could not contact your poweradmin web server"
+    exit 1
+fi
+
+[ $verbose -eq 1 ] && echo "Status: $response"