package main

import (
    "fmt"
    "net"

    "github.com/dwisiswant0/fastdns"
    "github.com/miekg/dns"
)

func main() {
	// Define the DNS resolver to use.
	// This should be a valid IP address of a DNS resolver.
	resolver := net.ParseIP("1.1.1.1")

	// Create a new FastDNS instance with the default resolver.
	f, err := fastdns.New(resolver)
	if err != nil {
		panic(err)
	}

	// Ensure that the FastDNS instance is closed when done.
	// Closing is essential to properly release all underlying XDP and socket
	// resources.
	//
	// If Close is not called, system resources such as file descriptors and
	// network handles may be leaked, which can eventually exhaust available
	// resources and cause failures in network operations or prevent new FastDNS
	// instances from being created.
	defer f.Close()

	// Create a new DNS query message.
	msg := new(dns.Msg)
	msg.SetQuestion(dns.Fqdn("cloudflare.com"), dns.TypeA)

	// Send the DNS query and receive the response.
	resp, _, err := f.Query(msg)
	if err != nil {
		f.Close()

		panic(err)
	}

	fmt.Printf("Response: %v\n", resp.String())
	fmt.Printf("Round-trip time: %v\n", rtt)
}