From 4f6f4beef591ad47eeb4e2218e03116fba84e30f Mon Sep 17 00:00:00 2001
From: tofasthacker <comet@use.startmail.com>
Date: Mon, 26 Feb 2024 18:54:15 -0500
Subject: [PATCH] first commit

---
 README.md                |   0
 cloudflare_multi_update  |   7 +++
 cloudflare_single_update | 105 +++++++++++++++++++++++++++++++++++++++
 domain_lists             |   2 +
 4 files changed, 114 insertions(+)
 create mode 100644 README.md
 create mode 100755 cloudflare_multi_update
 create mode 100755 cloudflare_single_update
 create mode 100644 domain_lists

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/cloudflare_multi_update b/cloudflare_multi_update
new file mode 100755
index 0000000..445534d
--- /dev/null
+++ b/cloudflare_multi_update
@@ -0,0 +1,7 @@
+#!/bin/bash
+rm /home/brickman/cloudflare-ddns-updater/logs &>/dev/null
+while read -r domain_name; do
+    if [ -n "$domain_name" ]; then
+        /home/brickman/cloudflare-ddns-updater/cloudflare_single_update "$domain_name" >> /home/brickman/cloudflare-ddns-updater/logs
+    fi
+done < "/home/brickman/cloudflare-ddns-updater/domain_lists"
diff --git a/cloudflare_single_update b/cloudflare_single_update
new file mode 100755
index 0000000..07186d0
--- /dev/null
+++ b/cloudflare_single_update
@@ -0,0 +1,105 @@
+#!/bin/bash
+## change to "bin/sh" when necessary
+
+auth_email="<email>"             # The email used to login 'https://dash.cloudflare.com'
+auth_method="token"                                 # Set to "global" for Global API Key or "token" for Scoped API Token
+auth_key="<key>" # Your API Token or Global API Key
+zone_identifier="<zone id>"  # Can be found in the "Overview" tab of your domain
+record_name="<record>"           # Which record you want to be synced
+ttl="120"                                           # Set the DNS TTL (seconds)
+proxy="false"                                       # Set the proxy to true or false
+
+
+if [ -n "$1" ]; then
+    record_name="$1"
+else
+    exit 1
+fi
+
+###########################################
+## Check if we have a public IP
+###########################################
+ipv4_regex='([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])\.([01]?[0-9]?[0-9]|2[0-4][0-9]|25[0-5])'
+ip=$(curl -s -4 https://cloudflare.com/cdn-cgi/trace | grep -E '^ip'); ret=$?
+if [[ ! $ret == 0 ]]; then # In the case that cloudflare failed to return an ip.
+    # Attempt to get the ip from other websites.
+    ip=$(curl -s https://api.ipify.org || curl -s https://ipv4.icanhazip.com)
+else
+    # Extract just the ip from the ip line from cloudflare.
+    ip=$(echo $ip | sed -E "s/^ip=($ipv4_regex)$/\1/")
+fi
+
+# Use regex to check for proper IPv4 format.
+if [[ ! $ip =~ ^$ipv4_regex$ ]]; then
+    echo "DDNS Updater: Failed to find a valid IP."
+    curl -d "DDNS Updater: Failed to find a valid IP." --url https://ntfy.sh/server_errors_1
+    exit 2
+fi
+
+###########################################
+## Check and set the proper auth header
+###########################################
+if [[ "${auth_method}" == "global" ]]; then
+  auth_header="X-Auth-Key:"
+else
+  auth_header="Authorization: Bearer"
+fi
+
+###########################################
+## Seek for the A record
+###########################################
+
+echo "DDNS Updater: Check Initiated"
+record=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records?type=A&name=$record_name" \
+                      -H "X-Auth-Email: $auth_email" \
+                      -H "$auth_header $auth_key" \
+                      -H "Content-Type: application/json")
+
+###########################################
+## Check if the domain has an A record
+###########################################
+if [[ $record == *"\"count\":0"* ]]; then
+  echo "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})"
+  curl -d "DDNS Updater: Record does not exist, perhaps create one first? (${ip} for ${record_name})" --url https://ntfy.sh/server_errors_1
+  exit 1
+fi
+
+###########################################
+## Get existing IP
+###########################################
+old_ip=$(echo "$record" | sed -E 's/.*"content":"(([0-9]{1,3}\.){3}[0-9]{1,3})".*/\1/')
+# Compare if they're the same
+if [[ $ip == $old_ip ]]; then
+  echo "DDNS Updater: IP ($ip) for ${record_name} has not changed."
+  exit 0
+fi
+
+###########################################
+## Set the record identifier from result
+###########################################
+record_identifier=$(echo "$record" | sed -E 's/.*"id":"(\w+)".*/\1/')
+
+###########################################
+## Change the IP@Cloudflare using the API
+###########################################
+update=$(curl -s -X PATCH "https://api.cloudflare.com/client/v4/zones/$zone_identifier/dns_records/$record_identifier" \
+                     -H "X-Auth-Email: $auth_email" \
+                     -H "$auth_header $auth_key" \
+                     -H "Content-Type: application/json" \
+                     --data "{\"type\":\"A\",\"name\":\"$record_name\",\"content\":\"$ip\",\"ttl\":\"$ttl\",\"proxied\":${proxy}}")
+
+###########################################
+## Report the status
+###########################################
+echo $update
+case "$update" in
+*"\"success\":false"*)
+  echo "DDNS Updater: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS:\n$update"
+  curl -d "DDNS Updater: $ip $record_name DDNS failed for $record_identifier ($ip). DUMPING RESULTS: $update" --url https://ntfy.sh/server_errors_1
+  exit 1;;
+*)
+  echo "DDNS Updater: $ip $record_name DDNS updated."
+  exit 0;;
+esac
+
+
diff --git a/domain_lists b/domain_lists
new file mode 100644
index 0000000..b122874
--- /dev/null
+++ b/domain_lists
@@ -0,0 +1,2 @@
+example.com
+test.example.com