From 00cf4bc3cd84b76e9a1c1f75655aec3e6ccde13c Mon Sep 17 00:00:00 2001
From: mzz <2017@duck.com>
Date: Sun, 9 Jul 2023 16:02:17 +0800
Subject: [PATCH] refactor(dns): replace dnsmessage with miekg/dns (#188)

---
 common/netutils/dns.go                        | 101 ++++---
 common/netutils/ip46.go                       |   2 +-
 common/netutils/ip46_test.go                  |  22 ++
 common/utils.go                               |   7 +-
 component/dns/dns.go                          |  36 ++-
 component/dns/function_parser.go              |  28 +-
 component/dns/request_routing.go              |   7 +-
 component/dns/response_routing.go             |   7 +-
 .../outbound/dialer/connectivity_check.go     |   2 +-
 component/outbound/dialer/socks/socks_test.go |   9 +-
 component/outbound/dialer_group_test.go       |  26 +-
 control/control_plane.go                      |  56 ++--
 control/control_plane_core.go                 |  40 +--
 control/dns_cache.go                          |  38 +--
 control/dns_control.go                        | 257 +++++++-----------
 control/dns_utils.go                          |  98 ++-----
 control/udp.go                                |   8 +-
 control/udp_endpoint.go                       |   4 -
 go.mod                                        |   3 +-
 go.sum                                        |   3 +
 20 files changed, 327 insertions(+), 427 deletions(-)
 create mode 100644 common/netutils/ip46_test.go

diff --git a/common/netutils/dns.go b/common/netutils/dns.go
index b38e450..9b93838 100644
--- a/common/netutils/dns.go
+++ b/common/netutils/dns.go
@@ -12,14 +12,13 @@ import (
 	"io"
 	"math"
 	"net/netip"
-	"strings"
 	"sync"
 	"time"
 
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mzz2017/softwind/netproxy"
 	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/pool"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 var (
@@ -90,29 +89,37 @@ func SystemDns() (dns netip.AddrPort, err error) {
 	return systemDns, nil
 }
 
-func ResolveNetip(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host string, typ dnsmessage.Type, network string) (addrs []netip.Addr, err error) {
+func ResolveNetip(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host string, typ uint16, network string) (addrs []netip.Addr, err error) {
 	resources, err := resolve(ctx, d, dns, host, typ, network)
 	if err != nil {
 		return nil, err
 	}
 	for _, ans := range resources {
-		if ans.Header.Type != typ {
+		if ans.Header().Rrtype != typ {
 			continue
 		}
+		var (
+			ip  netip.Addr
+			okk bool
+		)
 		switch typ {
 		case dnsmessage.TypeA:
-			a, ok := ans.Body.(*dnsmessage.AResource)
+			a, ok := ans.(*dnsmessage.A)
 			if !ok {
 				return nil, BadDnsAnsError
 			}
-			addrs = append(addrs, netip.AddrFrom4(a.A))
+			ip, okk = netip.AddrFromSlice(a.A)
 		case dnsmessage.TypeAAAA:
-			a, ok := ans.Body.(*dnsmessage.AAAAResource)
+			a, ok := ans.(*dnsmessage.AAAA)
 			if !ok {
 				return nil, BadDnsAnsError
 			}
-			addrs = append(addrs, netip.AddrFrom16(a.AAAA))
+			ip, okk = netip.AddrFromSlice(a.AAAA)
 		}
+		if !okk {
+			continue
+		}
+		addrs = append(addrs, ip)
 	}
 	return addrs, nil
 }
@@ -124,50 +131,47 @@ func ResolveNS(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host
 		return nil, err
 	}
 	for _, ans := range resources {
-		if ans.Header.Type != typ {
+		if ans.Header().Rrtype != typ {
 			continue
 		}
-		ns, ok := ans.Body.(*dnsmessage.NSResource)
+		ns, ok := ans.(*dnsmessage.NS)
 		if !ok {
 			return nil, BadDnsAnsError
 		}
-		records = append(records, ns.NS.String())
+		records = append(records, ns.Ns)
 	}
 	return records, nil
 }
 
-func resolve(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host string, typ dnsmessage.Type, network string) (ans []dnsmessage.Resource, err error) {
+func resolve(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host string, typ uint16, network string) (ans []dnsmessage.RR, err error) {
 	ctx, cancel := context.WithCancel(ctx)
 	defer cancel()
-	fqdn := host
-	if !strings.HasSuffix(fqdn, ".") {
-		fqdn += "."
-	}
+	fqdn := dnsmessage.CanonicalName(host)
 	switch typ {
 	case dnsmessage.TypeA, dnsmessage.TypeAAAA:
 		if addr, err := netip.ParseAddr(host); err == nil {
 			if (addr.Is4() || addr.Is4In6()) && typ == dnsmessage.TypeA {
-				return []dnsmessage.Resource{
-					{
-						Header: dnsmessage.ResourceHeader{
-							Name:  dnsmessage.MustNewName(fqdn),
-							Class: dnsmessage.ClassINET,
-							TTL:   0,
-							Type:  typ,
+				return []dnsmessage.RR{
+					&dnsmessage.A{
+						Hdr: dnsmessage.RR_Header{
+							Name:   dnsmessage.CanonicalName(fqdn),
+							Class:  dnsmessage.ClassINET,
+							Ttl:    0,
+							Rrtype: typ,
 						},
-						Body: &dnsmessage.AResource{A: addr.As4()},
+						A: addr.AsSlice(),
 					},
 				}, nil
 			} else if addr.Is6() && typ == dnsmessage.TypeAAAA {
-				return []dnsmessage.Resource{
-					{
-						Header: dnsmessage.ResourceHeader{
-							Name:  dnsmessage.MustNewName(fqdn),
-							Class: dnsmessage.ClassINET,
-							TTL:   0,
-							Type:  typ,
+				return []dnsmessage.RR{
+					&dnsmessage.AAAA{
+						Hdr: dnsmessage.RR_Header{
+							Name:   dnsmessage.CanonicalName(fqdn),
+							Class:  dnsmessage.ClassINET,
+							Ttl:    0,
+							Rrtype: typ,
 						},
-						Body: &dnsmessage.AAAAResource{AAAA: addr.As16()},
+						AAAA: addr.AsSlice(),
 					},
 				}, nil
 			}
@@ -177,25 +181,18 @@ func resolve(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host st
 	default:
 	}
 	// Build DNS req.
-	builder := dnsmessage.NewBuilder(nil, dnsmessage.Header{
-		ID:               uint16(fastrand.Intn(math.MaxUint16 + 1)),
-		Response:         false,
-		OpCode:           0,
-		Truncated:        false,
-		RecursionDesired: true,
-		Authoritative:    false,
-	})
-	if err = builder.StartQuestions(); err != nil {
-		return nil, err
+	builder := dnsmessage.Msg{
+		MsgHdr: dnsmessage.MsgHdr{
+			Id:               uint16(fastrand.Intn(math.MaxUint16 + 1)),
+			Response:         false,
+			Opcode:           0,
+			Truncated:        false,
+			RecursionDesired: true,
+			Authoritative:    false,
+		},
 	}
-	if err = builder.Question(dnsmessage.Question{
-		Name:  dnsmessage.MustNewName(fqdn),
-		Type:  typ,
-		Class: dnsmessage.ClassINET,
-	}); err != nil {
-		return nil, err
-	}
-	b, err := builder.Finish()
+	builder.SetQuestion(fqdn, typ)
+	b, err := builder.Pack()
 	if err != nil {
 		return nil, err
 	}
@@ -265,12 +262,12 @@ func resolve(ctx context.Context, d netproxy.Dialer, dns netip.AddrPort, host st
 			return
 		}
 		// Resolve DNS response and extract A/AAAA record.
-		var msg dnsmessage.Message
+		var msg dnsmessage.Msg
 		if err = msg.Unpack(buf[:n]); err != nil {
 			ch <- err
 			return
 		}
-		ans = msg.Answers
+		ans = msg.Answer
 		ch <- nil
 	}()
 	select {
diff --git a/common/netutils/ip46.go b/common/netutils/ip46.go
index 6d2f007..3d8ac90 100644
--- a/common/netutils/ip46.go
+++ b/common/netutils/ip46.go
@@ -12,9 +12,9 @@ import (
 	"net/netip"
 	"sync"
 
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mzz2017/softwind/netproxy"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type Ip46 struct {
diff --git a/common/netutils/ip46_test.go b/common/netutils/ip46_test.go
new file mode 100644
index 0000000..3f0b9d5
--- /dev/null
+++ b/common/netutils/ip46_test.go
@@ -0,0 +1,22 @@
+package netutils
+
+import (
+	"context"
+	"net/netip"
+	"testing"
+	"time"
+
+	"github.com/mzz2017/softwind/protocol/direct"
+)
+
+func TestResolveIp46(t *testing.T) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	ip46, err := ResolveIp46(ctx, direct.SymmetricDirect, netip.MustParseAddrPort("223.5.5.5:53"), "www.apple.com", "udp", false)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !ip46.Ip4.IsValid() && !ip46.Ip6.IsValid() {
+		t.Fatal("No record")
+	}
+}
diff --git a/common/utils.go b/common/utils.go
index 2067903..80a0505 100644
--- a/common/utils.go
+++ b/common/utils.go
@@ -12,7 +12,6 @@ import (
 	"encoding/binary"
 	"encoding/hex"
 	"fmt"
-	"github.com/mzz2017/softwind/netproxy"
 	"net/netip"
 	"net/url"
 	"path/filepath"
@@ -22,9 +21,11 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/mzz2017/softwind/netproxy"
+
 	internal "github.com/daeuniverse/dae/pkg/ebpf_internal"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/vishvananda/netlink"
-	"golang.org/x/net/dns/dnsmessage"
 	"golang.org/x/sys/unix"
 )
 
@@ -409,7 +410,7 @@ func NewGcm(key []byte) (cipher.AEAD, error) {
 	return cipher.NewGCM(block)
 }
 
-func AddrToDnsType(addr netip.Addr) dnsmessage.Type {
+func AddrToDnsType(addr netip.Addr) uint16 {
 	if addr.Is4() {
 		return dnsmessage.TypeA
 	} else {
diff --git a/component/dns/dns.go b/component/dns/dns.go
index f997dd0..f1ed9d5 100644
--- a/component/dns/dns.go
+++ b/component/dns/dns.go
@@ -16,8 +16,8 @@ import (
 	"github.com/daeuniverse/dae/common/consts"
 	"github.com/daeuniverse/dae/component/routing"
 	"github.com/daeuniverse/dae/config"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 var BadUpstreamFormatError = fmt.Errorf("bad upstream format")
@@ -148,7 +148,7 @@ func (s *Dns) InitUpstreams() {
 	wg.Wait()
 }
 
-func (s *Dns) RequestSelect(qname string, qtype dnsmessage.Type) (upstreamIndex consts.DnsRequestOutboundIndex, upstream *Upstream, err error) {
+func (s *Dns) RequestSelect(qname string, qtype uint16) (upstreamIndex consts.DnsRequestOutboundIndex, upstream *Upstream, err error) {
 	// Route.
 	upstreamIndex, err = s.reqMatcher.Match(qname, qtype)
 	if err != nil {
@@ -170,29 +170,37 @@ func (s *Dns) RequestSelect(qname string, qtype dnsmessage.Type) (upstreamIndex
 	return upstreamIndex, upstream, nil
 }
 
-func (s *Dns) ResponseSelect(msg *dnsmessage.Message, fromUpstream *Upstream) (upstreamIndex consts.DnsResponseOutboundIndex, upstream *Upstream, err error) {
+func (s *Dns) ResponseSelect(msg *dnsmessage.Msg, fromUpstream *Upstream) (upstreamIndex consts.DnsResponseOutboundIndex, upstream *Upstream, err error) {
 	if !msg.Response {
 		return 0, nil, fmt.Errorf("DNS response expected but DNS request received")
 	}
 
 	// Prepare routing.
 	var qname string
-	var qtype dnsmessage.Type
+	var qtype uint16
 	var ips []netip.Addr
-	if len(msg.Questions) == 0 {
+	if len(msg.Question) == 0 {
 		qname = ""
 		qtype = 0
 	} else {
-		q := msg.Questions[0]
-		qname = q.Name.String()
-		qtype = q.Type
-		for _, ans := range msg.Answers {
-			switch body := ans.Body.(type) {
-			case *dnsmessage.AResource:
-				ips = append(ips, netip.AddrFrom4(body.A))
-			case *dnsmessage.AAAAResource:
-				ips = append(ips, netip.AddrFrom16(body.AAAA))
+		q := msg.Question[0]
+		qname = q.Name
+		qtype = q.Qtype
+		for _, ans := range msg.Answer {
+			var (
+				ip netip.Addr
+				ok bool
+			)
+			switch body := ans.(type) {
+			case *dnsmessage.A:
+				ip, ok = netip.AddrFromSlice(body.A)
+			case *dnsmessage.AAAA:
+				ip, ok = netip.AddrFromSlice(body.AAAA)
 			}
+			if !ok {
+				continue
+			}
+			ips = append(ips, ip)
 		}
 	}
 
diff --git a/component/dns/function_parser.go b/component/dns/function_parser.go
index f4fee4c..a025c9c 100644
--- a/component/dns/function_parser.go
+++ b/component/dns/function_parser.go
@@ -12,38 +12,20 @@ import (
 
 	"github.com/daeuniverse/dae/component/routing"
 	"github.com/daeuniverse/dae/pkg/config_parser"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
-var typeNames = map[string]dnsmessage.Type{
-	"A":     dnsmessage.TypeA,
-	"NS":    dnsmessage.TypeNS,
-	"CNAME": dnsmessage.TypeCNAME,
-	"SOA":   dnsmessage.TypeSOA,
-	"PTR":   dnsmessage.TypePTR,
-	"MX":    dnsmessage.TypeMX,
-	"TXT":   dnsmessage.TypeTXT,
-	"AAAA":  dnsmessage.TypeAAAA,
-	"SRV":   dnsmessage.TypeSRV,
-	"OPT":   dnsmessage.TypeOPT,
-	"WKS":   dnsmessage.TypeWKS,
-	"HINFO": dnsmessage.TypeHINFO,
-	"MINFO": dnsmessage.TypeMINFO,
-	"AXFR":  dnsmessage.TypeAXFR,
-	"ALL":   dnsmessage.TypeALL,
-}
-
-func TypeParserFactory(callback func(f *config_parser.Function, types []dnsmessage.Type, overrideOutbound *routing.Outbound) (err error)) routing.FunctionParser {
+func TypeParserFactory(callback func(f *config_parser.Function, types []uint16, overrideOutbound *routing.Outbound) (err error)) routing.FunctionParser {
 	return func(log *logrus.Logger, f *config_parser.Function, key string, paramValueGroup []string, overrideOutbound *routing.Outbound) (err error) {
-		var types []dnsmessage.Type
+		var types []uint16
 		for _, v := range paramValueGroup {
-			if t, ok := typeNames[strings.ToUpper(v)]; ok {
+			if t, ok := dnsmessage.StringToType[strings.ToUpper(v)]; ok {
 				types = append(types, t)
 				continue
 			}
 			if val, err := strconv.ParseUint(v, 0, 16); err == nil {
-				types = append(types, dnsmessage.Type(val))
+				types = append(types, uint16(val))
 				continue
 			}
 			return fmt.Errorf("unknown DNS request type: %v", v)
diff --git a/component/dns/request_routing.go b/component/dns/request_routing.go
index 69e439e..b2334d9 100644
--- a/component/dns/request_routing.go
+++ b/component/dns/request_routing.go
@@ -15,7 +15,6 @@ import (
 	"github.com/daeuniverse/dae/config"
 	"github.com/daeuniverse/dae/pkg/config_parser"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type RequestMatcherBuilder struct {
@@ -88,7 +87,7 @@ func (b *RequestMatcherBuilder) addQName(f *config_parser.Function, key string,
 	return nil
 }
 
-func (b *RequestMatcherBuilder) addQType(f *config_parser.Function, values []dnsmessage.Type, upstream *routing.Outbound) (err error) {
+func (b *RequestMatcherBuilder) addQType(f *config_parser.Function, values []uint16, upstream *routing.Outbound) (err error) {
 	for i, value := range values {
 		upstreamName := consts.OutboundLogicalOr.String()
 		if i == len(values)-1 {
@@ -166,7 +165,7 @@ type requestMatchSet struct {
 
 func (m *RequestMatcher) Match(
 	qName string,
-	qType dnsmessage.Type,
+	qType uint16,
 ) (upstreamIndex consts.DnsRequestOutboundIndex, err error) {
 	var domainMatchBitmap []uint32
 	if qName != "" {
@@ -185,7 +184,7 @@ func (m *RequestMatcher) Match(
 				goodSubrule = true
 			}
 		case consts.MatchType_QType:
-			if qType == dnsmessage.Type(match.Value) {
+			if qType == match.Value {
 				goodSubrule = true
 			}
 		case consts.MatchType_Fallback:
diff --git a/component/dns/response_routing.go b/component/dns/response_routing.go
index acee549..83a6f22 100644
--- a/component/dns/response_routing.go
+++ b/component/dns/response_routing.go
@@ -18,7 +18,6 @@ import (
 	"github.com/daeuniverse/dae/pkg/config_parser"
 	"github.com/daeuniverse/dae/pkg/trie"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type ResponseMatcherBuilder struct {
@@ -138,7 +137,7 @@ func (b *ResponseMatcherBuilder) addUpstream(f *config_parser.Function, values [
 	return nil
 }
 
-func (b *ResponseMatcherBuilder) addQType(f *config_parser.Function, values []dnsmessage.Type, upstream *routing.Outbound) (err error) {
+func (b *ResponseMatcherBuilder) addQType(f *config_parser.Function, values []uint16, upstream *routing.Outbound) (err error) {
 	for i, value := range values {
 		upstreamName := consts.OutboundLogicalOr.String()
 		if i == len(values)-1 {
@@ -219,7 +218,7 @@ type responseMatchSet struct {
 
 func (m *ResponseMatcher) Match(
 	qName string,
-	qType dnsmessage.Type,
+	qType uint16,
 	ips []netip.Addr,
 	upstream consts.DnsRequestOutboundIndex,
 ) (upstreamIndex consts.DnsResponseOutboundIndex, err error) {
@@ -253,7 +252,7 @@ func (m *ResponseMatcher) Match(
 				}
 			}
 		case consts.MatchType_QType:
-			if qType == dnsmessage.Type(match.Value) {
+			if qType == uint16(match.Value) {
 				goodSubrule = true
 			}
 		case consts.MatchType_Upstream:
diff --git a/component/outbound/dialer/connectivity_check.go b/component/outbound/dialer/connectivity_check.go
index 0929590..601cf97 100644
--- a/component/outbound/dialer/connectivity_check.go
+++ b/component/outbound/dialer/connectivity_check.go
@@ -25,11 +25,11 @@ import (
 
 	"github.com/daeuniverse/dae/common/consts"
 	"github.com/daeuniverse/dae/common/netutils"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mzz2017/softwind/netproxy"
 	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/protocol/direct"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type NetworkType struct {
diff --git a/component/outbound/dialer/socks/socks_test.go b/component/outbound/dialer/socks/socks_test.go
index a663eca..410de06 100644
--- a/component/outbound/dialer/socks/socks_test.go
+++ b/component/outbound/dialer/socks/socks_test.go
@@ -7,13 +7,14 @@ package socks
 
 import (
 	"context"
-	"github.com/daeuniverse/dae/common/netutils"
-	"github.com/daeuniverse/dae/component/outbound/dialer"
-	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 	"net/netip"
 	"testing"
 	"time"
+
+	"github.com/daeuniverse/dae/common/netutils"
+	"github.com/daeuniverse/dae/component/outbound/dialer"
+	dnsmessage "github.com/miekg/dns"
+	"github.com/sirupsen/logrus"
 )
 
 func TestSocks5(t *testing.T) {
diff --git a/component/outbound/dialer_group_test.go b/component/outbound/dialer_group_test.go
index 5ad5dfd..ca200d8 100644
--- a/component/outbound/dialer_group_test.go
+++ b/component/outbound/dialer_group_test.go
@@ -30,8 +30,8 @@ func TestDialerGroup_Select_Fixed(t *testing.T) {
 	log := logger.NewLogger("trace", false)
 	option := &dialer.GlobalOption{
 		Log:               log,
-		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: testTcpCheckUrl},
-		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: testUdpCheckDns},
+		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: []string{testTcpCheckUrl}},
+		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: []string{testUdpCheckDns}},
 		CheckInterval:     15 * time.Second,
 		CheckTolerance:    0,
 		CheckDnsTcp:       false,
@@ -46,7 +46,7 @@ func TestDialerGroup_Select_Fixed(t *testing.T) {
 		FixedIndex: fixedIndex,
 	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 	for i := 0; i < 10; i++ {
-		d, _, err := g.Select(TestNetworkType)
+		d, _, err := g.Select(TestNetworkType, false)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -58,7 +58,7 @@ func TestDialerGroup_Select_Fixed(t *testing.T) {
 	fixedIndex = 0
 	g.selectionPolicy.FixedIndex = fixedIndex
 	for i := 0; i < 10; i++ {
-		d, _, err := g.Select(TestNetworkType)
+		d, _, err := g.Select(TestNetworkType, false)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -73,8 +73,8 @@ func TestDialerGroup_Select_MinLastLatency(t *testing.T) {
 
 	option := &dialer.GlobalOption{
 		Log:               log,
-		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: testTcpCheckUrl},
-		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: testUdpCheckDns},
+		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: []string{testTcpCheckUrl}},
+		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: []string{testUdpCheckDns}},
 		CheckInterval:     15 * time.Second,
 	}
 	dialers := []*dialer.Dialer{
@@ -120,7 +120,7 @@ func TestDialerGroup_Select_MinLastLatency(t *testing.T) {
 			}
 			g.MustGetAliveDialerSet(TestNetworkType).NotifyLatencyChange(d, alive)
 		}
-		d, _, err := g.Select(TestNetworkType)
+		d, _, err := g.Select(TestNetworkType, false)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -143,8 +143,8 @@ func TestDialerGroup_Select_Random(t *testing.T) {
 
 	option := &dialer.GlobalOption{
 		Log:               log,
-		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: testTcpCheckUrl},
-		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: testUdpCheckDns},
+		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: []string{testTcpCheckUrl}},
+		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: []string{testUdpCheckDns}},
 		CheckInterval:     15 * time.Second,
 	}
 	dialers := []*dialer.Dialer{
@@ -159,7 +159,7 @@ func TestDialerGroup_Select_Random(t *testing.T) {
 	}, func(alive bool, networkType *dialer.NetworkType, isInit bool) {})
 	count := make([]int, len(dialers))
 	for i := 0; i < 100; i++ {
-		d, _, err := g.Select(TestNetworkType)
+		d, _, err := g.Select(TestNetworkType, false)
 		if err != nil {
 			t.Fatal(err)
 		}
@@ -183,8 +183,8 @@ func TestDialerGroup_SetAlive(t *testing.T) {
 
 	option := &dialer.GlobalOption{
 		Log:               log,
-		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: testTcpCheckUrl},
-		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: testUdpCheckDns},
+		TcpCheckOptionRaw: dialer.TcpCheckOptionRaw{Raw: []string{testTcpCheckUrl}},
+		CheckDnsOptionRaw: dialer.CheckDnsOptionRaw{Raw: []string{testUdpCheckDns}},
 		CheckInterval:     15 * time.Second,
 	}
 	dialers := []*dialer.Dialer{
@@ -201,7 +201,7 @@ func TestDialerGroup_SetAlive(t *testing.T) {
 	g.MustGetAliveDialerSet(TestNetworkType).NotifyLatencyChange(dialers[zeroTarget], false)
 	count := make([]int, len(dialers))
 	for i := 0; i < 100; i++ {
-		d, _, err := g.Select(TestNetworkType)
+		d, _, err := g.Select(TestNetworkType, false)
 		if err != nil {
 			t.Fatal(err)
 		}
diff --git a/control/control_plane.go b/control/control_plane.go
index 1a51c1e..8c08578 100644
--- a/control/control_plane.go
+++ b/control/control_plane.go
@@ -32,12 +32,12 @@ import (
 	"github.com/daeuniverse/dae/config"
 	"github.com/daeuniverse/dae/pkg/config_parser"
 	internal "github.com/daeuniverse/dae/pkg/ebpf_internal"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mohae/deepcopy"
 	"github.com/mzz2017/softwind/pool"
 	"github.com/mzz2017/softwind/protocol/direct"
 	"github.com/mzz2017/softwind/transport/grpc"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 	"golang.org/x/sys/unix"
 )
 
@@ -409,10 +409,10 @@ func NewControlPlane(
 			}
 			return nil
 		},
-		NewCache: func(fqdn string, answers []dnsmessage.Resource, deadline time.Time) (cache *DnsCache, err error) {
+		NewCache: func(fqdn string, answers []dnsmessage.RR, deadline time.Time) (cache *DnsCache, err error) {
 			return &DnsCache{
 				DomainBitmap: plane.routingMatcher.domainMatcher.MatchDomainBitmap(fqdn),
-				Answers:      answers,
+				Answer:       answers,
 				Deadline:     deadline,
 			}, nil
 		},
@@ -433,8 +433,13 @@ func NewControlPlane(
 				continue
 			}
 			host := cacheKey[:lastDot]
-			typ := cacheKey[lastDot+1:]
-			_ = plane.dnsController.UpdateDnsCacheDeadline(host, typ, cache.Answers, cache.Deadline)
+			_typ := cacheKey[lastDot+1:]
+			typ, err := strconv.ParseUint(_typ, 10, 16)
+			if err != nil {
+				// Unexpected.
+				return nil, err
+			}
+			_ = plane.dnsController.UpdateDnsCacheDeadline(host, uint16(typ), cache.Answer, cache.Deadline)
 		}
 	} else if _bpf != nil {
 		// Is reloading, and dnsCache == nil.
@@ -509,43 +514,36 @@ func (c *ControlPlane) dnsUpstreamReadyCallback(dnsUpstream *dns.Upstream) (err
 	/// Updates dns cache to support domain routing for hostname of dns_upstream.
 	// Ten years later.
 	deadline := time.Now().Add(time.Hour * 24 * 365 * 10)
-	fqdn := dnsUpstream.Hostname
-	if !strings.HasSuffix(fqdn, ".") {
-		fqdn = fqdn + "."
-	}
+	fqdn := dnsmessage.CanonicalName(dnsUpstream.Hostname)
 
 	if dnsUpstream.Ip4.IsValid() {
 		typ := dnsmessage.TypeA
-		answers := []dnsmessage.Resource{{
-			Header: dnsmessage.ResourceHeader{
-				Name:  dnsmessage.MustNewName(fqdn),
-				Type:  typ,
-				Class: dnsmessage.ClassINET,
-				TTL:   0, // Must be zero.
-			},
-			Body: &dnsmessage.AResource{
-				A: dnsUpstream.Ip4.As4(),
+		answers := []dnsmessage.RR{&dnsmessage.A{
+			Hdr: dnsmessage.RR_Header{
+				Name:   dnsmessage.CanonicalName(fqdn),
+				Rrtype: typ,
+				Class:  dnsmessage.ClassINET,
+				Ttl:    0, // Must be zero.
 			},
+			A: dnsUpstream.Ip4.AsSlice(),
 		}}
-		if err = c.dnsController.UpdateDnsCacheDeadline(dnsUpstream.Hostname, typ.String(), answers, deadline); err != nil {
+		if err = c.dnsController.UpdateDnsCacheDeadline(dnsUpstream.Hostname, typ, answers, deadline); err != nil {
 			return err
 		}
 	}
 
 	if dnsUpstream.Ip6.IsValid() {
 		typ := dnsmessage.TypeAAAA
-		answers := []dnsmessage.Resource{{
-			Header: dnsmessage.ResourceHeader{
-				Name:  dnsmessage.MustNewName(fqdn),
-				Type:  typ,
-				Class: dnsmessage.ClassINET,
-				TTL:   0, // Must be zero.
-			},
-			Body: &dnsmessage.AAAAResource{
-				AAAA: dnsUpstream.Ip6.As16(),
+		answers := []dnsmessage.RR{&dnsmessage.AAAA{
+			Hdr: dnsmessage.RR_Header{
+				Name:   dnsmessage.CanonicalName(fqdn),
+				Rrtype: typ,
+				Class:  dnsmessage.ClassINET,
+				Ttl:    0, // Must be zero.
 			},
+			AAAA: dnsUpstream.Ip6.AsSlice(),
 		}}
-		if err = c.dnsController.UpdateDnsCacheDeadline(dnsUpstream.Hostname, typ.String(), answers, deadline); err != nil {
+		if err = c.dnsController.UpdateDnsCacheDeadline(dnsUpstream.Hostname, typ, answers, deadline); err != nil {
 			return err
 		}
 	}
diff --git a/control/control_plane_core.go b/control/control_plane_core.go
index 8f402c2..b4121c5 100644
--- a/control/control_plane_core.go
+++ b/control/control_plane_core.go
@@ -20,11 +20,11 @@ import (
 	"github.com/daeuniverse/dae/common"
 	"github.com/daeuniverse/dae/common/consts"
 	internal "github.com/daeuniverse/dae/pkg/ebpf_internal"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mohae/deepcopy"
 	"github.com/safchain/ethtool"
 	"github.com/sirupsen/logrus"
 	"github.com/vishvananda/netlink"
-	"golang.org/x/net/dns/dnsmessage"
 	"golang.org/x/sys/unix"
 )
 
@@ -629,15 +629,18 @@ func (c *controlPlaneCore) _bindWan(ifname string) error {
 func (c *controlPlaneCore) BatchUpdateDomainRouting(cache *DnsCache) error {
 	// Parse ips from DNS resp answers.
 	var ips []netip.Addr
-	for _, ans := range cache.Answers {
-		var ip netip.Addr
-		switch ans.Header.Type {
-		case dnsmessage.TypeA:
-			ip = netip.AddrFrom4(ans.Body.(*dnsmessage.AResource).A)
-		case dnsmessage.TypeAAAA:
-			ip = netip.AddrFrom16(ans.Body.(*dnsmessage.AAAAResource).AAAA)
+	for _, ans := range cache.Answer {
+		var (
+			ip netip.Addr
+			ok bool
+		)
+		switch body := ans.(type) {
+		case *dnsmessage.A:
+			ip, ok = netip.AddrFromSlice(body.A)
+		case *dnsmessage.AAAA:
+			ip, ok = netip.AddrFromSlice(body.AAAA)
 		}
-		if ip.IsUnspecified() {
+		if !ok || ip.IsUnspecified() {
 			continue
 		}
 		ips = append(ips, ip)
@@ -672,15 +675,18 @@ func (c *controlPlaneCore) BatchUpdateDomainRouting(cache *DnsCache) error {
 func (c *controlPlaneCore) BatchRemoveDomainRouting(cache *DnsCache) error {
 	// Parse ips from DNS resp answers.
 	var ips []netip.Addr
-	for _, ans := range cache.Answers {
-		var ip netip.Addr
-		switch ans.Header.Type {
-		case dnsmessage.TypeA:
-			ip = netip.AddrFrom4(ans.Body.(*dnsmessage.AResource).A)
-		case dnsmessage.TypeAAAA:
-			ip = netip.AddrFrom16(ans.Body.(*dnsmessage.AAAAResource).AAAA)
+	for _, ans := range cache.Answer {
+		var (
+			ip netip.Addr
+			ok bool
+		)
+		switch body := ans.(type) {
+		case *dnsmessage.A:
+			ip, ok = netip.AddrFromSlice(body.A)
+		case *dnsmessage.AAAA:
+			ip, ok = netip.AddrFromSlice(body.AAAA)
 		}
-		if ip.IsUnspecified() {
+		if !ok || ip.IsUnspecified() {
 			continue
 		}
 		ips = append(ips, ip)
diff --git a/control/dns_cache.go b/control/dns_cache.go
index 7ddf094..43122ea 100644
--- a/control/dns_cache.go
+++ b/control/dns_cache.go
@@ -9,49 +9,39 @@ import (
 	"net/netip"
 	"time"
 
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mohae/deepcopy"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 type DnsCache struct {
 	DomainBitmap []uint32
-	Answers      []dnsmessage.Resource
+	Answer       []dnsmessage.RR
 	Deadline     time.Time
 }
 
-func (c *DnsCache) FillInto(req *dnsmessage.Message) {
-	req.Answers = deepcopy.Copy(c.Answers).([]dnsmessage.Resource)
-	// No need to align because of no flipping now.
-	//// Align question and answer Name.
-	//if len(req.Questions) > 0 {
-	//	q := req.Questions[0]
-	//	for i := range req.Answers {
-	//		if strings.EqualFold(req.Answers[i].Header.Name.String(), q.Name.String()) {
-	//			req.Answers[i].Header.Name.Data = q.Name.Data
-	//		}
-	//	}
-	//}
-	req.RCode = dnsmessage.RCodeSuccess
+func (c *DnsCache) FillInto(req *dnsmessage.Msg) {
+	req.Answer = deepcopy.Copy(c.Answer).([]dnsmessage.RR)
+	req.Rcode = dnsmessage.RcodeSuccess
 	req.Response = true
 	req.RecursionAvailable = true
 	req.Truncated = false
 }
 
 func (c *DnsCache) IncludeIp(ip netip.Addr) bool {
-	for _, ans := range c.Answers {
-		switch body := ans.Body.(type) {
-		case *dnsmessage.AResource:
+	for _, ans := range c.Answer {
+		switch body := ans.(type) {
+		case *dnsmessage.A:
 			if !ip.Is4() {
 				continue
 			}
-			if netip.AddrFrom4(body.A) == ip {
+			if a, ok := netip.AddrFromSlice(body.A); ok && a == ip {
 				return true
 			}
-		case *dnsmessage.AAAAResource:
+		case *dnsmessage.AAAA:
 			if !ip.Is6() {
 				continue
 			}
-			if netip.AddrFrom16(body.AAAA) == ip {
+			if a, ok := netip.AddrFromSlice(body.AAAA); ok && a == ip {
 				return true
 			}
 		}
@@ -60,9 +50,9 @@ func (c *DnsCache) IncludeIp(ip netip.Addr) bool {
 }
 
 func (c *DnsCache) IncludeAnyIp() bool {
-	for _, ans := range c.Answers {
-		switch ans.Body.(type) {
-		case *dnsmessage.AResource, *dnsmessage.AAAAResource:
+	for _, ans := range c.Answer {
+		switch ans.(type) {
+		case *dnsmessage.A, *dnsmessage.AAAA:
 			return true
 		}
 	}
diff --git a/control/dns_control.go b/control/dns_control.go
index 52e2d4e..849a394 100644
--- a/control/dns_control.go
+++ b/control/dns_control.go
@@ -8,12 +8,12 @@ package control
 import (
 	"context"
 	"encoding/binary"
-	"errors"
 	"fmt"
 	"io"
 	"math"
 	"net"
 	"net/netip"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -25,12 +25,12 @@ import (
 	"github.com/daeuniverse/dae/component/dns"
 	"github.com/daeuniverse/dae/component/outbound"
 	"github.com/daeuniverse/dae/component/outbound/dialer"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mohae/deepcopy"
 	"github.com/mzz2017/softwind/netproxy"
 	"github.com/mzz2017/softwind/pkg/fastrand"
 	"github.com/mzz2017/softwind/pool"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 const (
@@ -47,7 +47,6 @@ const (
 )
 
 var (
-	SuspectedRushAnswerError     = fmt.Errorf("suspected DNS rush-answer")
 	UnsupportedQuestionTypeError = fmt.Errorf("unsupported question type")
 )
 
@@ -60,7 +59,7 @@ type DnsControllerOption struct {
 	Log                 *logrus.Logger
 	CacheAccessCallback func(cache *DnsCache) (err error)
 	CacheRemoveCallback func(cache *DnsCache) (err error)
-	NewCache            func(fqdn string, answers []dnsmessage.Resource, deadline time.Time) (cache *DnsCache, err error)
+	NewCache            func(fqdn string, answers []dnsmessage.RR, deadline time.Time) (cache *DnsCache, err error)
 	BestDialerChooser   func(req *udpRequest, upstream *dns.Upstream) (*dialArgument, error)
 	IpVersionPrefer     int
 	FixedDomainTtl      map[string]int
@@ -70,12 +69,12 @@ type DnsController struct {
 	handling sync.Map
 
 	routing     *dns.Dns
-	qtypePrefer dnsmessage.Type
+	qtypePrefer uint16
 
 	log                 *logrus.Logger
 	cacheAccessCallback func(cache *DnsCache) (err error)
 	cacheRemoveCallback func(cache *DnsCache) (err error)
-	newCache            func(fqdn string, answers []dnsmessage.Resource, deadline time.Time) (cache *DnsCache, err error)
+	newCache            func(fqdn string, answers []dnsmessage.RR, deadline time.Time) (cache *DnsCache, err error)
 	bestDialerChooser   func(req *udpRequest, upstream *dns.Upstream) (*dialArgument, error)
 
 	fixedDomainTtl map[string]int
@@ -84,7 +83,7 @@ type DnsController struct {
 	dnsCache   map[string]*DnsCache
 }
 
-func parseIpVersionPreference(prefer int) (dnsmessage.Type, error) {
+func parseIpVersionPreference(prefer int) (uint16, error) {
 	switch prefer := IpVersionPrefer(prefer); prefer {
 	case IpVersionPrefer_No:
 		return 0, nil
@@ -120,15 +119,12 @@ func NewDnsController(routing *dns.Dns, option *DnsControllerOption) (c *DnsCont
 	}, nil
 }
 
-func (c *DnsController) cacheKey(qname string, qtype dnsmessage.Type) string {
+func (c *DnsController) cacheKey(qname string, qtype uint16) string {
 	// To fqdn.
-	if !strings.HasSuffix(qname, ".") {
-		qname = qname + "."
-	}
-	return strings.ToLower(qname) + qtype.String()
+	return dnsmessage.CanonicalName(qname) + strconv.Itoa(int(qtype))
 }
 
-func (c *DnsController) RemoveDnsRespCache(qname string, qtype dnsmessage.Type) {
+func (c *DnsController) RemoveDnsRespCache(qname string, qtype uint16) {
 	c.dnsCacheMu.Lock()
 	key := c.cacheKey(qname, qtype)
 	_, ok := c.dnsCache[key]
@@ -137,7 +133,7 @@ func (c *DnsController) RemoveDnsRespCache(qname string, qtype dnsmessage.Type)
 	}
 	c.dnsCacheMu.Unlock()
 }
-func (c *DnsController) LookupDnsRespCache(qname string, qtype dnsmessage.Type) (cache *DnsCache) {
+func (c *DnsController) LookupDnsRespCache(qname string, qtype uint16) (cache *DnsCache) {
 	c.dnsCacheMu.Lock()
 	cache, ok := c.dnsCache[c.cacheKey(qname, qtype)]
 	c.dnsCacheMu.Unlock()
@@ -150,15 +146,15 @@ func (c *DnsController) LookupDnsRespCache(qname string, qtype dnsmessage.Type)
 }
 
 // LookupDnsRespCache_ will modify the msg in place.
-func (c *DnsController) LookupDnsRespCache_(msg *dnsmessage.Message) (resp []byte) {
-	if len(msg.Questions) == 0 {
+func (c *DnsController) LookupDnsRespCache_(msg *dnsmessage.Msg) (resp []byte) {
+	if len(msg.Question) == 0 {
 		return nil
 	}
-	q := msg.Questions[0]
+	q := msg.Question[0]
 	if msg.Response {
 		return nil
 	}
-	cache := c.LookupDnsRespCache(q.Name.String(), q.Type)
+	cache := c.LookupDnsRespCache(q.Name, q.Qtype)
 	if cache != nil {
 		cache.FillInto(msg)
 		b, err := msg.Pack()
@@ -176,28 +172,28 @@ func (c *DnsController) LookupDnsRespCache_(msg *dnsmessage.Message) (resp []byt
 }
 
 // DnsRespHandler handle DNS resp.
-func (c *DnsController) DnsRespHandler(data []byte, validateRushAns bool) (newMsg *dnsmessage.Message, err error) {
-	var msg dnsmessage.Message
+func (c *DnsController) DnsRespHandler(data []byte) (newMsg *dnsmessage.Msg, err error) {
+	var msg dnsmessage.Msg
 	if err = msg.Unpack(data); err != nil {
 		return nil, fmt.Errorf("unpack dns pkt: %w", err)
 	}
 	// Check healthy resp.
-	if !msg.Response || len(msg.Questions) == 0 {
+	if !msg.Response || len(msg.Question) == 0 {
 		return &msg, nil
 	}
 
-	q := msg.Questions[0]
+	q := msg.Question[0]
 
 	// Check suc resp.
-	if msg.RCode != dnsmessage.RCodeSuccess {
+	if msg.Rcode != dnsmessage.RcodeSuccess {
 		return &msg, nil
 	}
 
 	// Get TTL.
 	var ttl uint32
-	for i := range msg.Answers {
+	for i := range msg.Answer {
 		if ttl == 0 {
-			ttl = msg.Answers[i].Header.TTL
+			ttl = msg.Answer[i].Header().Ttl
 			break
 		}
 	}
@@ -207,7 +203,7 @@ func (c *DnsController) DnsRespHandler(data []byte, validateRushAns bool) (newMs
 	}
 
 	// Check req type.
-	switch q.Type {
+	switch q.Qtype {
 	case dnsmessage.TypeA, dnsmessage.TypeAAAA:
 	default:
 		// Update DnsCache.
@@ -218,17 +214,17 @@ func (c *DnsController) DnsRespHandler(data []byte, validateRushAns bool) (newMs
 	}
 
 	// Set ttl.
-	for i := range msg.Answers {
+	for i := range msg.Answer {
 		// Set TTL = zero. This requests applications must resend every request.
 		// However, it may be not defined in the standard.
-		msg.Answers[i].Header.TTL = 0
+		msg.Answer[i].Header().Ttl = 0
 	}
 
 	// Check if request A/AAAA record.
 	var reqIpRecord bool
 loop:
-	for i := range msg.Questions {
-		switch msg.Questions[i].Type {
+	for i := range msg.Question {
+		switch msg.Question[i].Qtype {
 		case dnsmessage.TypeA, dnsmessage.TypeAAAA:
 			reqIpRecord = true
 			break loop
@@ -242,23 +238,6 @@ loop:
 		return &msg, nil
 	}
 
-	if validateRushAns {
-		exist, e := EnsureAdditionalOpt(&msg, false)
-		if e != nil && !errors.Is(e, UnsupportedQuestionTypeError) {
-			c.log.Warnf("EnsureAdditionalOpt: %v", e)
-		}
-		if e == nil && !exist {
-			// Additional record OPT in the request was ensured, and in normal case the resp should also set it.
-			// This DNS packet may be a rush-answer, and we should reject it.
-			c.log.WithFields(logrus.Fields{
-				"ques":     q,
-				"addition": FormatDnsRsc(msg.Additionals),
-				"ans":      FormatDnsRsc(msg.Answers),
-			}).Traceln("DNS rush-answer detected")
-			return nil, SuspectedRushAnswerError
-		}
-	}
-
 	// Update DnsCache.
 	if err = c.updateDnsCache(&msg, ttl, &q); err != nil {
 		return nil, err
@@ -267,31 +246,29 @@ loop:
 	return &msg, nil
 }
 
-func (c *DnsController) updateDnsCache(msg *dnsmessage.Message, ttl uint32, q *dnsmessage.Question) error {
+func (c *DnsController) updateDnsCache(msg *dnsmessage.Msg, ttl uint32, q *dnsmessage.Question) error {
 	// Update DnsCache.
 	if c.log.IsLevelEnabled(logrus.TraceLevel) {
 		c.log.WithFields(logrus.Fields{
-			"_qname":   q.Name,
-			"rcode":    msg.RCode,
-			"ans":      FormatDnsRsc(msg.Answers),
-			"auth":     FormatDnsRsc(msg.Authorities),
-			"addition": FormatDnsRsc(msg.Additionals),
+			"_qname": q.Name,
+			"rcode":  msg.Rcode,
+			"ans":    FormatDnsRsc(msg.Answer),
 		}).Tracef("Update DNS record cache")
 	}
 
-	if err := c.UpdateDnsCacheTtl(q.Name.String(), q.Type.String(), msg.Answers, int(ttl)); err != nil {
+	if err := c.UpdateDnsCacheTtl(q.Name, q.Qtype, msg.Answer, int(ttl)); err != nil {
 		return err
 	}
 	return nil
 }
 
-func (c *DnsController) __updateDnsCacheDeadline(host string, dnsTyp string, answers []dnsmessage.Resource, deadlineFunc func(now time.Time, host string) time.Time) (err error) {
+func (c *DnsController) __updateDnsCacheDeadline(host string, dnsTyp uint16, answers []dnsmessage.RR, deadlineFunc func(now time.Time, host string) time.Time) (err error) {
 	var fqdn string
 	if strings.HasSuffix(host, ".") {
-		fqdn = host
+		fqdn = strings.ToLower(host)
 		host = host[:len(host)-1]
 	} else {
-		fqdn = host + "."
+		fqdn = dnsmessage.CanonicalName(host)
 	}
 	// Bypass pure IP.
 	if _, err = netip.ParseAddr(host); err == nil {
@@ -301,11 +278,11 @@ func (c *DnsController) __updateDnsCacheDeadline(host string, dnsTyp string, ans
 	now := time.Now()
 	deadline := deadlineFunc(now, host)
 
-	cacheKey := fqdn + dnsTyp
+	cacheKey := c.cacheKey(fqdn, dnsTyp)
 	c.dnsCacheMu.Lock()
 	cache, ok := c.dnsCache[cacheKey]
 	if ok {
-		cache.Answers = answers
+		cache.Answer = answers
 		cache.Deadline = deadline
 		c.dnsCacheMu.Unlock()
 	} else {
@@ -324,7 +301,7 @@ func (c *DnsController) __updateDnsCacheDeadline(host string, dnsTyp string, ans
 	return nil
 }
 
-func (c *DnsController) UpdateDnsCacheDeadline(host string, dnsTyp string, answers []dnsmessage.Resource, deadline time.Time) (err error) {
+func (c *DnsController) UpdateDnsCacheDeadline(host string, dnsTyp uint16, answers []dnsmessage.RR, deadline time.Time) (err error) {
 	return c.__updateDnsCacheDeadline(host, dnsTyp, answers, func(now time.Time, host string) time.Time {
 		if fixedTtl, ok := c.fixedDomainTtl[host]; ok {
 			/// NOTICE: Cannot set TTL accurately.
@@ -336,7 +313,7 @@ func (c *DnsController) UpdateDnsCacheDeadline(host string, dnsTyp string, answe
 	})
 }
 
-func (c *DnsController) UpdateDnsCacheTtl(host string, dnsTyp string, answers []dnsmessage.Resource, ttl int) (err error) {
+func (c *DnsController) UpdateDnsCacheTtl(host string, dnsTyp uint16, answers []dnsmessage.RR, ttl int) (err error) {
 	return c.__updateDnsCacheDeadline(host, dnsTyp, answers, func(now time.Time, host string) time.Time {
 		if fixedTtl, ok := c.fixedDomainTtl[host]; ok {
 			return now.Add(time.Duration(fixedTtl) * time.Second)
@@ -346,27 +323,16 @@ func (c *DnsController) UpdateDnsCacheTtl(host string, dnsTyp string, answers []
 	})
 }
 
-func (c *DnsController) DnsRespHandlerFactory(validateRushAnsFunc func(from netip.AddrPort) bool) func(data []byte, from netip.AddrPort) (msg *dnsmessage.Message, err error) {
-	return func(data []byte, from netip.AddrPort) (msg *dnsmessage.Message, err error) {
+func (c *DnsController) DnsRespHandlerFactory() func(data []byte, from netip.AddrPort) (msg *dnsmessage.Msg, err error) {
+	return func(data []byte, from netip.AddrPort) (msg *dnsmessage.Msg, err error) {
 		// Do not return conn-unrelated err in this func.
 
-		validateRushAns := validateRushAnsFunc(from)
-		msg, err = c.DnsRespHandler(data, validateRushAns)
+		msg, err = c.DnsRespHandler(data)
 		if err != nil {
-			if errors.Is(err, SuspectedRushAnswerError) {
-				if validateRushAns {
-					// Reject DNS rush-answer.
-					c.log.WithFields(logrus.Fields{
-						"from": from,
-					}).Tracef("DNS rush-answer rejected")
-					return nil, nil
-				}
-			} else {
-				if c.log.IsLevelEnabled(logrus.DebugLevel) {
-					c.log.Debugf("DnsRespHandler: %v", err)
-				}
-				return nil, err
+			if c.log.IsLevelEnabled(logrus.DebugLevel) {
+				c.log.Debugf("DnsRespHandler: %v", err)
 			}
+			return nil, err
 		}
 		return msg, nil
 	}
@@ -390,11 +356,11 @@ type dialArgument struct {
 	mark         uint32
 }
 
-func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest) (err error) {
-	if c.log.IsLevelEnabled(logrus.TraceLevel) && len(dnsMessage.Questions) > 0 {
-		q := dnsMessage.Questions[0]
+func (c *DnsController) Handle_(dnsMessage *dnsmessage.Msg, req *udpRequest) (err error) {
+	if c.log.IsLevelEnabled(logrus.TraceLevel) && len(dnsMessage.Question) > 0 {
+		q := dnsMessage.Question[0]
 		c.log.Tracef("Received UDP(DNS) %v <-> %v: %v %v",
-			RefineSourceToShow(req.realSrc, req.realDst.Addr(), req.lanWanFlag), req.realDst.String(), strings.ToLower(q.Name.String()), q.Type,
+			RefineSourceToShow(req.realSrc, req.realDst.Addr(), req.lanWanFlag), req.realDst.String(), strings.ToLower(q.Name), QtypeToString(q.Qtype),
 		)
 	}
 
@@ -404,10 +370,10 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 
 	// Prepare qname, qtype.
 	var qname string
-	var qtype dnsmessage.Type
-	if len(dnsMessage.Questions) != 0 {
-		qname = dnsMessage.Questions[0].Name.String()
-		qtype = dnsMessage.Questions[0].Type
+	var qtype uint16
+	if len(dnsMessage.Question) != 0 {
+		qname = dnsMessage.Question[0].Name
+		qtype = dnsMessage.Question[0].Qtype
 	}
 
 	// Check ip version preference and qtype.
@@ -421,9 +387,9 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 	}
 
 	// Try to make both A and AAAA lookups.
-	dnsMessage2 := deepcopy.Copy(dnsMessage).(*dnsmessage.Message)
-	dnsMessage2.ID = uint16(fastrand.Intn(math.MaxUint16))
-	var qtype2 dnsmessage.Type
+	dnsMessage2 := deepcopy.Copy(dnsMessage).(*dnsmessage.Msg)
+	dnsMessage2.Id = uint16(fastrand.Intn(math.MaxUint16))
+	var qtype2 uint16
 	switch qtype {
 	case dnsmessage.TypeA:
 		qtype2 = dnsmessage.TypeAAAA
@@ -432,7 +398,7 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 	default:
 		return fmt.Errorf("unexpected qtype path")
 	}
-	dnsMessage2.Questions[0].Type = qtype2
+	dnsMessage2.Question[0].Qtype = qtype2
 
 	done := make(chan struct{})
 	go func() {
@@ -452,7 +418,7 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 		// resp is not valid.
 		c.log.WithFields(logrus.Fields{
 			"qname": qname,
-		}).Tracef("Reject %v due to resp not valid", qtype.String())
+		}).Tracef("Reject %v due to resp not valid", qtype)
 		return c.sendReject_(dnsMessage, req)
 	}
 	// resp is valid.
@@ -465,25 +431,19 @@ func (c *DnsController) Handle_(dnsMessage *dnsmessage.Message, req *udpRequest)
 }
 
 func (c *DnsController) handle_(
-	dnsMessage *dnsmessage.Message,
+	dnsMessage *dnsmessage.Msg,
 	req *udpRequest,
 	needResp bool,
 ) (err error) {
 	// Prepare qname, qtype.
 	var qname string
-	var qtype dnsmessage.Type
-	if len(dnsMessage.Questions) != 0 {
-		q := dnsMessage.Questions[0]
-		qname = q.Name.String()
-		qtype = q.Type
+	var qtype uint16
+	if len(dnsMessage.Question) != 0 {
+		q := dnsMessage.Question[0]
+		qname = q.Name
+		qtype = q.Qtype
 	}
 
-	//// NOTICE: Rush-answer detector was removed because it does not always work in all districts.
-	//// Make sure there is additional record OPT in the request to filter DNS rush-answer in the response process.
-	//// Because rush-answer has no resp OPT. We can distinguish them from multiple responses.
-	//// Note that additional record OPT may not be supported by home router either.
-	//_, _ = EnsureAdditionalOpt(dnsMessage, true)
-
 	// Route request.
 	upstreamIndex, upstream, err := c.routing.RequestSelect(qname, qtype)
 	if err != nil {
@@ -509,10 +469,10 @@ func (c *DnsController) handle_(
 				return fmt.Errorf("failed to write cached DNS resp: %w", err)
 			}
 		}
-		if c.log.IsLevelEnabled(logrus.DebugLevel) && len(dnsMessage.Questions) > 0 {
-			q := dnsMessage.Questions[0]
+		if c.log.IsLevelEnabled(logrus.DebugLevel) && len(dnsMessage.Question) > 0 {
+			q := dnsMessage.Question[0]
 			c.log.Debugf("UDP(DNS) %v <-> Cache: %v %v",
-				RefineSourceToShow(req.realSrc, req.realDst.Addr(), req.lanWanFlag), strings.ToLower(q.Name.String()), q.Type,
+				RefineSourceToShow(req.realSrc, req.realDst.Addr(), req.lanWanFlag), strings.ToLower(q.Name), QtypeToString(q.Qtype),
 			)
 		}
 		return nil
@@ -524,7 +484,7 @@ func (c *DnsController) handle_(
 			upstreamName = upstream.String()
 		}
 		c.log.WithFields(logrus.Fields{
-			"question": dnsMessage.Questions,
+			"question": dnsMessage.Question,
 			"upstream": upstreamName,
 		}).Traceln("Request to DNS upstream")
 	}
@@ -534,44 +494,44 @@ func (c *DnsController) handle_(
 	if err != nil {
 		return fmt.Errorf("pack DNS packet: %w", err)
 	}
-	return c.dialSend(0, req, data, dnsMessage.ID, upstream, needResp)
+	return c.dialSend(0, req, data, dnsMessage.Id, upstream, needResp)
 }
 
 // sendReject_ send empty answer.
-func (c *DnsController) sendReject_(dnsMessage *dnsmessage.Message, req *udpRequest) (err error) {
-	dnsMessage.Answers = nil
-	if len(dnsMessage.Questions) > 0 {
-		q := dnsMessage.Questions[0]
-		switch typ := q.Type; typ {
+func (c *DnsController) sendReject_(dnsMessage *dnsmessage.Msg, req *udpRequest) (err error) {
+	dnsMessage.Answer = nil
+	if len(dnsMessage.Question) > 0 {
+		q := dnsMessage.Question[0]
+		switch typ := q.Qtype; typ {
 		case dnsmessage.TypeA:
-			dnsMessage.Answers = []dnsmessage.Resource{{
-				Header: dnsmessage.ResourceHeader{
-					Name:  q.Name,
-					Type:  typ,
-					Class: dnsmessage.ClassINET,
-					TTL:   0,
+			dnsMessage.Answer = []dnsmessage.RR{&dnsmessage.A{
+				Hdr: dnsmessage.RR_Header{
+					Name:   q.Name,
+					Rrtype: typ,
+					Class:  dnsmessage.ClassINET,
+					Ttl:    0,
 				},
-				Body: &dnsmessage.AResource{A: UnspecifiedAddressA.As4()},
+				A: UnspecifiedAddressA.AsSlice(),
 			}}
 		case dnsmessage.TypeAAAA:
-			dnsMessage.Answers = []dnsmessage.Resource{{
-				Header: dnsmessage.ResourceHeader{
-					Name:  q.Name,
-					Type:  typ,
-					Class: dnsmessage.ClassINET,
-					TTL:   0,
+			dnsMessage.Answer = []dnsmessage.RR{&dnsmessage.AAAA{
+				Hdr: dnsmessage.RR_Header{
+					Name:   q.Name,
+					Rrtype: typ,
+					Class:  dnsmessage.ClassINET,
+					Ttl:    0,
 				},
-				Body: &dnsmessage.AAAAResource{AAAA: UnspecifiedAddressAAAA.As16()},
+				AAAA: UnspecifiedAddressAAAA.AsSlice(),
 			}}
 		}
 	}
-	dnsMessage.RCode = dnsmessage.RCodeSuccess
+	dnsMessage.Rcode = dnsmessage.RcodeSuccess
 	dnsMessage.Response = true
 	dnsMessage.RecursionAvailable = true
 	dnsMessage.Truncated = false
 	if c.log.IsLevelEnabled(logrus.TraceLevel) {
 		c.log.WithFields(logrus.Fields{
-			"question": dnsMessage.Questions,
+			"question": dnsMessage.Question,
 		}).Traceln("Reject")
 	}
 	data, err := dnsMessage.Pack()
@@ -623,21 +583,9 @@ func (c *DnsController) dialSend(invokingDepth int, req *udpRequest, data []byte
 	}
 
 	// dnsRespHandler caches dns response and check rush answers.
-	dnsRespHandler := c.DnsRespHandlerFactory(func(from netip.AddrPort) bool {
-		//// NOTICE: Rush-answer detector was removed because it does not always work in all districts.
-		//// We only validate rush-ans when outbound is direct and pkt does not send to a home device.
-		//// Because additional record OPT may not be supported by home router.
-		//// So se should trust home devices even if they make rush-answer (or looks like).
-		//return dialArgument.bestDialer.Property().Name == "direct" &&
-		//	!from.Addr().IsPrivate() &&
-		//	!from.Addr().IsLoopback() &&
-		//	!from.Addr().IsUnspecified()
-
-		// Do not validate rush-answer.
-		return false
-	})
+	dnsRespHandler := c.DnsRespHandlerFactory()
 	// Dial and send.
-	var respMsg *dnsmessage.Message
+	var respMsg *dnsmessage.Msg
 	// defer in a recursive call will delay Close(), thus we Close() before
 	// the next recursive call. However, a connection cannot be closed twice.
 	// We should set a connClosed flag to avoid it.
@@ -774,23 +722,23 @@ func (c *DnsController) dialSend(invokingDepth int, req *udpRequest, data []byte
 		// Accept.
 		if c.log.IsLevelEnabled(logrus.TraceLevel) {
 			c.log.WithFields(logrus.Fields{
-				"question": respMsg.Questions,
+				"question": respMsg.Question,
 				"upstream": upstreamName,
 			}).Traceln("Accept")
 		}
 	case consts.DnsResponseOutboundIndex_Reject:
 		// Reject the request with empty answer.
-		respMsg.Answers = nil
+		respMsg.Answer = nil
 		if c.log.IsLevelEnabled(logrus.TraceLevel) {
 			c.log.WithFields(logrus.Fields{
-				"question": respMsg.Questions,
+				"question": respMsg.Question,
 				"upstream": upstreamName,
 			}).Traceln("Reject with empty answer")
 		}
 	default:
 		if c.log.IsLevelEnabled(logrus.TraceLevel) {
 			c.log.WithFields(logrus.Fields{
-				"question":      respMsg.Questions,
+				"question":      respMsg.Question,
 				"last_upstream": upstreamName,
 				"next_upstream": nextUpstream.String(),
 			}).Traceln("Change DNS upstream and resend")
@@ -798,11 +746,14 @@ func (c *DnsController) dialSend(invokingDepth int, req *udpRequest, data []byte
 		return c.dialSend(invokingDepth+1, req, data, id, nextUpstream, needResp)
 	}
 	if upstreamIndex.IsReserved() && c.log.IsLevelEnabled(logrus.InfoLevel) {
-		var qname, qtype string
-		if len(respMsg.Questions) > 0 {
-			q := respMsg.Questions[0]
-			qname = strings.ToLower(q.Name.String())
-			qtype = q.Type.String()
+		var (
+			qname string
+			qtype string
+		)
+		if len(respMsg.Question) > 0 {
+			q := respMsg.Question[0]
+			qname = strings.ToLower(q.Name)
+			qtype = QtypeToString(q.Qtype)
 		}
 		fields := logrus.Fields{
 			"network":  networkType.String(),
@@ -825,7 +776,7 @@ func (c *DnsController) dialSend(invokingDepth int, req *udpRequest, data []byte
 		}
 	}
 	// Keep the id the same with request.
-	respMsg.ID = id
+	respMsg.Id = id
 	data, err = respMsg.Pack()
 	if err != nil {
 		return err
diff --git a/control/dns_utils.go b/control/dns_utils.go
index a53fbee..3c449b9 100644
--- a/control/dns_utils.go
+++ b/control/dns_utils.go
@@ -6,98 +6,44 @@
 package control
 
 import (
-	"encoding/binary"
 	"fmt"
-	"hash/fnv"
-	"math/rand"
-	"net/netip"
+	"strconv"
 	"strings"
 
-	"golang.org/x/net/dns/dnsmessage"
+	dnsmessage "github.com/miekg/dns"
 )
 
-// FlipDnsQuestionCase is used to reduce dns pollution.
-func FlipDnsQuestionCase(dm *dnsmessage.Message) {
-	if len(dm.Questions) == 0 {
-		return
-	}
-	q := &dm.Questions[0]
-	// For reproducibility, we use dm.ID as input and add some entropy to make the results more discrete.
-	h := fnv.New64()
-	var buf [4]byte
-	binary.BigEndian.PutUint16(buf[:], dm.ID)
-	h.Write(buf[:2])
-	binary.BigEndian.PutUint32(buf[:], 20230204) // entropy
-	h.Write(buf[:])
-	r := rand.New(rand.NewSource(int64(h.Sum64())))
-	perm := r.Perm(int(q.Name.Length))
-	for i := 0; i < int(q.Name.Length/3); i++ {
-		j := perm[i]
-		// Upper to lower; lower to upper.
-		if q.Name.Data[j] >= 'a' && q.Name.Data[j] <= 'z' {
-			q.Name.Data[j] -= 'a' - 'A'
-		} else if q.Name.Data[j] >= 'A' && q.Name.Data[j] <= 'Z' {
-			q.Name.Data[j] += 'a' - 'A'
-		}
-	}
-}
-
-// EnsureAdditionalOpt makes sure there is additional record OPT in the request.
-func EnsureAdditionalOpt(dm *dnsmessage.Message, isReqAdd bool) (bool, error) {
-	// Check healthy resp.
-	if isReqAdd == dm.Response || dm.RCode != dnsmessage.RCodeSuccess || len(dm.Questions) == 0 {
-		return false, UnsupportedQuestionTypeError
-	}
-	q := dm.Questions[0]
-	switch q.Type {
-	case dnsmessage.TypeA, dnsmessage.TypeAAAA:
-	default:
-		return false, UnsupportedQuestionTypeError
-	}
-
-	for _, ad := range dm.Additionals {
-		if ad.Header.Type == dnsmessage.TypeOPT {
-			// Already has additional record OPT.
-			return true, nil
-		}
-	}
-	if !isReqAdd {
-		return false, nil
-	}
-	// Add one.
-	dm.Additionals = append(dm.Additionals, dnsmessage.Resource{
-		Header: dnsmessage.ResourceHeader{
-			Name:  dnsmessage.MustNewName("."),
-			Type:  dnsmessage.TypeOPT,
-			Class: 512, TTL: 0, Length: 0,
-		},
-		Body: &dnsmessage.OPTResource{
-			Options: nil,
-		},
-	})
-	return false, nil
-}
-
 type RscWrapper struct {
-	Rsc dnsmessage.Resource
+	Rsc dnsmessage.RR
 }
 
 func (w RscWrapper) String() string {
 	var strBody string
-	switch body := w.Rsc.Body.(type) {
-	case *dnsmessage.AResource:
-		strBody = netip.AddrFrom4(body.A).String()
-	case *dnsmessage.AAAAResource:
-		strBody = netip.AddrFrom16(body.AAAA).String()
+	switch body := w.Rsc.(type) {
+	case *dnsmessage.A:
+		strBody = body.A.String()
+	case *dnsmessage.AAAA:
+		strBody = body.AAAA.String()
+	case *dnsmessage.CNAME:
+		strBody = body.Target
 	default:
-		strBody = body.GoString()
+		strBody = body.String()
 	}
-	return fmt.Sprintf("%v(%v): %v", w.Rsc.Header.Name.String(), w.Rsc.Header.Type.String(), strBody)
+	return fmt.Sprintf("%v(%v): %v", w.Rsc.Header().Name, QtypeToString(w.Rsc.Header().Rrtype), strBody)
 }
-func FormatDnsRsc(ans []dnsmessage.Resource) string {
+
+func FormatDnsRsc(ans []dnsmessage.RR) string {
 	var w []string
 	for _, a := range ans {
 		w = append(w, RscWrapper{Rsc: a}.String())
 	}
 	return strings.Join(w, "; ")
 }
+
+func QtypeToString(qtype uint16) string {
+	str, ok := dnsmessage.TypeToString[qtype]
+	if !ok {
+		str = strconv.Itoa(int(qtype))
+	}
+	return str
+}
diff --git a/control/udp.go b/control/udp.go
index e4ad09f..eb07037 100644
--- a/control/udp.go
+++ b/control/udp.go
@@ -20,9 +20,9 @@ import (
 	"github.com/daeuniverse/dae/component/outbound/dialer"
 	"github.com/daeuniverse/dae/component/sniffing"
 	internal "github.com/daeuniverse/dae/pkg/ebpf_internal"
+	dnsmessage "github.com/miekg/dns"
 	"github.com/mzz2017/softwind/pkg/zeroalloc/buffer"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/net/dns/dnsmessage"
 )
 
 const (
@@ -31,11 +31,11 @@ const (
 	MaxRetry          = 2
 )
 
-func ChooseNatTimeout(data []byte, sniffDns bool) (dmsg *dnsmessage.Message, timeout time.Duration) {
+func ChooseNatTimeout(data []byte, sniffDns bool) (dmsg *dnsmessage.Msg, timeout time.Duration) {
 	if sniffDns {
-		var dnsmsg dnsmessage.Message
+		var dnsmsg dnsmessage.Msg
 		if err := dnsmsg.Unpack(data); err == nil {
-			//log.Printf("DEBUG: lookup %v", dnsmsg.Questions[0].Name)
+			//log.Printf("DEBUG: lookup %v", dnsmsg.Question[0].Name)
 			return &dnsmsg, DnsNatTimeout
 		}
 	}
diff --git a/control/udp_endpoint.go b/control/udp_endpoint.go
index 1e37dfc..2e15123 100644
--- a/control/udp_endpoint.go
+++ b/control/udp_endpoint.go
@@ -6,7 +6,6 @@
 package control
 
 import (
-	"errors"
 	"fmt"
 	"net/netip"
 	"sync"
@@ -47,9 +46,6 @@ func (ue *UdpEndpoint) start() {
 		ue.deadlineTimer.Reset(ue.NatTimeout)
 		ue.mu.Unlock()
 		if err = ue.handler(buf[:n], from); err != nil {
-			if errors.Is(err, SuspectedRushAnswerError) {
-				continue
-			}
 			break
 		}
 	}
diff --git a/go.mod b/go.mod
index 3cdc228..5609a53 100644
--- a/go.mod
+++ b/go.mod
@@ -10,6 +10,7 @@ require (
 	github.com/daeuniverse/dae-config-dist/go/dae_config v0.0.0-20230604120805-1c27619b592d
 	github.com/gorilla/websocket v1.5.0
 	github.com/json-iterator/go v1.1.12
+	github.com/miekg/dns v1.1.55
 	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
 	github.com/mzz2017/softwind v0.0.0-20230708102709-26ff44839573
 	github.com/okzk/sdnotify v0.0.0-20180710141335-d9becc38acbd
@@ -21,7 +22,6 @@ require (
 	github.com/x-cray/logrus-prefixed-formatter v0.5.2
 	golang.org/x/crypto v0.11.0
 	golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df
-	golang.org/x/net v0.12.0
 	golang.org/x/sys v0.10.0
 	google.golang.org/protobuf v1.31.0
 )
@@ -38,6 +38,7 @@ require (
 	github.com/quic-go/qtls-go1-19 v0.3.2 // indirect
 	github.com/quic-go/qtls-go1-20 v0.2.2 // indirect
 	golang.org/x/mod v0.12.0 // indirect
+	golang.org/x/net v0.12.0 // indirect
 	golang.org/x/tools v0.11.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20230706204954-ccb25ca9f130 // indirect
 )
diff --git a/go.sum b/go.sum
index d1b6d1e..eb4ac0f 100644
--- a/go.sum
+++ b/go.sum
@@ -78,6 +78,8 @@ github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APP
 github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d h1:5PJl274Y63IEHC+7izoQE9x6ikvDFZS2mDVS3drnohI=
 github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d/go.mod h1:01TrycV0kFyexm33Z7vhZRXopbI8J3TDReVlkTgMUxE=
+github.com/miekg/dns v1.1.55 h1:GoQ4hpsj0nFLYe+bWiCToyrBEJXkQfOOIvFGFy0lEgo=
+github.com/miekg/dns v1.1.55/go.mod h1:uInx36IzPl7FYnDcMeVWxj9byh7DutNykX4G9Sj60FY=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
@@ -175,6 +177,7 @@ golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=