servfail.go

// Package example is a CoreDNS plugin that prints "example" to stdout on every packet received.
//
// It serves as an example CoreDNS plugin with numerous code comments.
package servfail

import (
	"context"

	"github.com/coredns/coredns/plugin"
	clog "github.com/coredns/coredns/plugin/pkg/log"

	"github.com/miekg/dns"
)

// Define log to be a logger with the plugin name in it. This way we can just use log.Info and
// friends to log.
var log = clog.NewWithPlugin("servfail")

type ServFail struct {
	Next plugin.Handler
}

// ServeDNS implements the plugin.Handler interface. This method gets called when example is used
// in a Server.
func (e *ServFail) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (int, error) {
	msg := new(dns.Msg)
	msg.SetReply(r)
	msg.Authoritative = true
	msg.RecursionAvailable = true
	msg.Rcode = dns.RcodeServerFailure

	w.WriteMsg(msg)

	return dns.RcodeSuccess, nil
}

// Name implements the Handler interface.
func (e *ServFail) Name() string { return "servfail" }