Script to check functionality of pi-hole

Script checks
 1. Google public DNS nameservers, ensure they resolve to public IP's
 2. Two random sites from the whitelist, ensure they are public IP's
 3. Two random sites from the adlist, ensure they resolve to the Pi-Hole IP
 4. Two random sites from the blacklist, ensure they resolve to the Pi-Hole IP

advanced/Scripts/check-functionality.sh

@@ -0,0 +1,115 @@
+#!/usr/bin/env bash
+
+
+IPv4dev=$(/sbin/ip route get 8.8.8.8 | awk '{for(i=1;i<=NF;i++)if($i~/dev/)print $(i+1)}')
+piholeIPCIDR=$(/sbin/ip -o -f inet addr show dev $IPv4dev | awk '{print $4}' | awk 'END {print}')
+piholeIP=${piholeIPCIDR%/*}
+
+adList=/etc/pihole/gravity.list
+blackList=/etc/pihole/blacklist.txt
+whiteList=/etc/pihole/whitelist.txt
+goodListNames="google-public-dns-a.google.com google-public-dns-b.google.com"
+
+
+# Function to resolve hostname and determine if IP is RFC1918, pi-hole, or internet address for the host.
+# Accepts 1 argument which is a host to resolve.
+verifyHostAddress() {
+    status=""
+    ip=`nslookup $1 192.168.100.122 | grep ^"Address:" | tail -1 | cut -d: -f2 | sed 's/ //g'`
+
+    if [[ $ip == $piholeIP ]]; then
+        status="pi-hole IP"
+    elif [[ $ip =~ (^127\.)|(^10\.)|(^172\.1[6-9]\.)|(^172\.2[0-9]\.)|(^172\.3[0-1]\.)|(^192\.168\.) ]]; then
+        status="RFC1918"
+    else
+        status=$ip
+    fi
+}
+
+
+if [[ -r $adList ]];then
+    adListNames=""
+    numberOf=$(cat $adList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        adListNames="$adListNames `sed -n ${n}p $adList | cut -d\  -f2`"
+    done
+fi
+
+
+if [[ -r $blackList ]];then
+    blackListNames=""
+    numberOf=$(cat $blackList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        blackListNames="$blackListNames `sed -n ${n}p $blackList`"
+    done
+fi
+
+
+if [[ -r $whiteList ]];then
+    whiteListNames=""
+    numberOf=$(cat $whiteList | sed '/^\s*$/d' | wc -l)
+    for n in `shuf -i 1-$numberOf -n 2`
+    do
+        whiteListNames="$whiteListNames `sed -n ${n}p $whiteList`"
+    done
+fi
+
+
+echo -e "\nTesting known good websites."
+for name in $goodListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tFailed - $name resolves to your pi-hole ($piholeIP)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tFailed - $name resolves to a non-routable address ($ip)"
+    else
+        echo -e "\tSuccess - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $whiteList file."
+for name in $whiteListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tFailed - $name resolves to your pi-hole ($piholeIP)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tFailed - $name resolves to a non-routable address ($ip)"
+    else
+        echo -e "\tSuccess - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $adList file."
+for name in $adListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tSuccess - $name resolves to your pi-hole ($ip)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tVerify - $name resolves to a non-routable address that is not your pi-hole server ($ip)"
+    else
+        echo -e "\tFailed - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+
+echo -e "\nTesting websites from your $blackList file."
+for name in $blackListNames
+do
+    verifyHostAddress "$name"
+    if [[ "$status" == "pi-hole IP" ]]; then
+        echo -e "\tSuccess - $name resolves to your pi-hole ($ip)"
+    elif [[ "$status" == "RFC1918" ]]; then
+        echo -e "\tVerify - $name resolves to a non-routable address that is not your pi-hole server ($ip)"
+    else
+        echo -e "\tFailed - $name resolves to a public IP address ($ip)"
+    fi
+done
+
+