Check and update IP if necessary.

cfddns.sh

@@ -109,6 +109,8 @@ errorExplain=()
 dnsRecords=()
 cfDetails=()
 cfRecords=()
+currentIP=()
+recordID=()
 ip4=1
 ip6=0
 
@@ -242,6 +244,49 @@ else
     done
 fi
 
+
+## Get existing IP address and identifier in CloudFlare's DNS records
+for recordIdx in "${!cfRecords[@]}"; do
+    currentIP+=($(echo "${cfRecords[recordIdx]}" | \
+        grep -Po '(?<="content":")[^"]*'))
+    recordID+=($(echo "${cfRecords[recordIdx]}" | \
+        grep -Po '(?<="id":")[^"]*'))
+    echo -e "\e[1;36mIndex $recordIdx: \e[0mFor record\e[1;33m" \
+        "${dnsRecords[recordIdx]}\e[0m" \
+        "with ID: \e[1;33m${recordID[recordIdx]}\e[0m" \
+        "the current IP is \e[1;35m ${currentIP[recordIdx]}\e[0m"
+done
+
+## Check whether new IP matches old IP and update if they do not match
+for recordIdx in "${!currentIP[@]}"; do
+    if [ ${currentIP[recordIdx]} = $ipAddress ]; then
+        echo -e "\e[0;32m${dnsRecords[recordIdx]} is up-to-date.\e[0m"
+    else
+        echo -e "\e[0;31m${dnsRecords[recordIdx]} needs updating...\e[0m"
+        if [ $ip4 -eq 1 ]; then
+            # update record at CloudFlare with new IP
+            update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records/${recordID[recordIdx]}" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json" --data "{\"id\":\"${cfDetails[2]}\",\"type\":\"A\",\"proxied\":false,\"name\":\"${dnsRecords[recordIdx]}\",\"content\":\"$ipAddress\"}")
+            # check for success code from CloudFlare
+            if [[ $update == *"\"success\":true"* ]]; then
+                echo -e "\e[1;32m${dnsRecords[recordIdx]} updated.\e[0m]"
+            else
+                echo -e "\e[1;31m${dnsRecords[recordIdx]} update failed\e[0m"
+            fi
+        elif [ $ip6 -eq 1 ]; then
+            # update record at CloudFlare with new IP
+            update=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${cfDetails[2]}/dns_records/${recordID[recordIdx]}" -H "X-Auth-Email: ${cfDetails[0]}" -H "X-Auth-Key: ${cfDetails[1]}" -H "Content-Type: application/json" --data "{\"id\":\"${cfDetails[2]}\",\"type\":\"AAAA\",\"proxied\":false,\"name\":\"${dnsRecords[recordIdx]}\",\"content\":\"$ipAddress\"}")
+            # check for success code from CloudFlare
+            if [[ $update == *"\"success\":true"* ]]; then
+                echo -e "\e[1;32m${dnsRecords[recordIdx]} updated.\e[0m"
+            else
+                echo -e "\e[1;31m${dnsRecords[recordIdx]} update failed\e[0m"
+            fi
+        fi
+    fi
+done
+
+
+
 quit
 
 # this code should never be executed