initial commit for dynamic IP script

readme.md

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+Dynamic IP
+============
+This script will update the VDM system with your dynamic IP. To run this script, use the following command (as root):
+
+```
+curl -s https://raw.githubusercontent.com/vdm-io/dynamic-ip/master/setip.sh | bash
+```
+
+This script performs the following actions:
+
+ * Adds random Host Key.
+ * Adds a cron entry to update this file on a scheduled basis.
+ * Adds the server IP to VDM system.

setip.sh

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+#!/usr/bin/env bash
+set -e
+
+# Check for CI
+if [ "$CI" = "true" ] ; then
+        BRANCH=$CIRCLE_SHA1
+        echo "Testing commit: $BRANCH"
+else
+        BRANCH="master"
+fi
+
+# simple basic random
+function getKey () {
+    echo $(tr -dc 'A-HJ-NP-Za-km-z2-9' < /dev/urandom | dd bs=128 count=1 status=none)
+}
+
+# Variables
+TRUE=1
+VDMUSER="vdm"
+VDMHOME="/home/vdm"
+VDMSCRIPT="https://raw.githubusercontent.com/vdm-io/dynamic-ip/$BRANCH/setip.sh"
+VDMIPSERVER="https://www.vdm.io/setip"
+
+# Require script to be run via sudo, but not as root
+if [[ $EUID -ne 0 ]]; then
+    echo "Script must be run with root privilages!"
+    exit 1
+fi
+
+# Set cronjob without removing existing
+if [ -f $VDMHOME/vdmip.cron ]; then
+	echo "Crontab already configured for updates...Skipping"
+else
+	echo -n "Adding crontab entry for continued updates..."
+	currentCron=$(crontab -u $VDMUSER -l)
+	echo "$currentCron" > $VDMHOME/vdmip.cron
+	# check if the MAILTO is already set
+	if [[ $currentCron != *"MAILTO"* ]]; then
+		echo "MAILTO=\"\"" >> $VDMHOME/vdmip.cron
+		echo "" >> $VDMHOME/vdmip.cron
+	fi
+	# check if the @reboot curl -s $VDMSCRIPT | sudo bash is already set
+	if [[ $currentCron != *"@reboot curl -s $VDMSCRIPT | sudo bash"* ]]; then
+		echo "@reboot curl -s $VDMSCRIPT | sudo bash" >> $VDMHOME/vdmip.cron
+	fi
+	# check if the @reboot curl -s $VDMSCRIPT | sudo bash is already set
+	if [[ $currentCron != *"*/30 * * * * curl -s $VDMSCRIPT | sudo bash"* ]]; then
+		echo "*/30 * * * * curl -s $VDMSCRIPT | sudo bash" >> $VDMHOME/vdmip.cron
+	fi
+	# set the user cron
+	crontab -u $VDMUSER $VDMHOME/vdmip.cron
+	echo "Done"
+fi
+
+# Set update key
+if [ -f $VDMHOME/ip.key ]; then
+	echo "Update key already set!"
+else
+	echo -n "Setting the update key..."
+	echo $(getKey) > $VDMHOME/ip.key
+	echo "Done"
+fi
+
+# Get update key
+serverKey=$(<"$VDMHOME/ip.key")
+
+# check if vdm access was set
+accessToke=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36"  --silent --data-urlencode "key=$serverKey" $VDMIPSERVER)
+
+if [[ "$accessToke" != "$TRUE" ]]; then
+	read -s -p "Please enter your VDM access key: " vdmAccessKey
+	echo
+	echo -n "One moment while we set your access to the VDM system..."
+	resultAccess=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36"  --silent --data-urlencode "trust=$vdmAccessKey" --data-urlencode  "key=$serverKey" $VDMIPSERVER)
+	if [[ "$resultAccess" != "$TRUE" ]]; then
+		echo " >> YOUR VDM ACCESS KEY IS INCORRECT! <<"
+		exit 1
+	fi
+	echo "Done"
+else
+	echo "Access granted to the VDM system."
+fi
+
+# get this server IP
+IPNOW="$(dig +short myip.opendns.com @resolver1.opendns.com)"
+# store the IP in the HOSTNAME file
+echo -n "Setting/Update the Dynamic IP..."
+resultUpdate=$(curl -H "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36"  --silent --data-urlencode "ip=$IPNOW" --data-urlencode "key=$serverKey" $VDMIPSERVER)
+if [[ "$resultUpdate" != "$TRUE" ]]; then
+	echo " >> YOUR SERVER KEY IS INCORRECT! << $resultUpdate"
+	exit 1
+fi
+echo "Done"