1 files changed, 33 insertions, 0 deletions
diff --git a/ipv6test.go b/ipv6test.go
new file mode 100644
index 0000000..c18faf9
--- /dev/null
+++ b/ipv6test.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"time"
+)
+
+// The host we will try to connect to.
+// ipv6.google.com is a good choice as it's highly available and resolves only to AAAA records (IPv6).
+const ipv6TestHost = "ipv6.google.com"
+const testPort = "443" // HTTPS port, almost always open.
+
+func IPv6test() (string, error) {
+	// We use net.DialTimeout to attempt a TCP connection.
+	// By specifying "tcp6" as the network, we force the dialer to use IPv6 only.
+	// If the system can't resolve the AAAA record or can't route to the IPv6 address,
+	// this will fail.
+	timeout := 2 * time.Second
+	conn, err := net.DialTimeout("tcp6", net.JoinHostPort(ipv6TestHost, testPort), timeout)
+
+	// Check the result.
+	if err != nil {
+		// The connection failed. This indicates that IPv6 is not working correctly.
+		return fmt.Sprintf("IPv6 connectivity test failed: %v"), err
+	}
+
+	// If we get here, the connection was successful.
+	// It's good practice to close the connection we opened.
+	conn.Close()
+
+	return fmt.Sprintf("IPv6 connectivity test successful."), nil
+}