chore: Upgrade to golangci-lint v2 (#7236)

Signed-off-by: Manuel Rüger <manuel@rueg.eu>

.github/workflows/golangci-lint.yml

@@ -13,6 +13,6 @@ jobs:
         with:
           go-version: ${{ env.GO_VERSION }}
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@55c2c1448f86e01eaae002a5a3a9624417608d84  # v6.5.2
+        uses: golangci/golangci-lint-action@1481404843c368bc19ca9406f87d6e0fc97bdcfd  # v7.0.0
         with:
-          version: v1.64.8
+          version: v2.0.2

.golangci.yml

@@ -1,13 +1,30 @@
-run:
-  timeout: 5m
+version: "2"
 linters:
-  disable-all: true
+  default: none
   enable:
     - govet
     - ineffassign
     - staticcheck
-    - typecheck
-    - whitespace
-    - unused
-    - gofmt
     - unconvert
+    - unused
+    - whitespace
+  exclusions:
+    generated: lax
+    presets:
+      - comments
+      - common-false-positives
+      - legacy
+      - std-error-handling
+    paths:
+      - third_party$
+      - builtin$
+      - examples$
+formatters:
+  enable:
+    - gofmt
+  exclusions:
+    generated: lax
+    paths:
+      - third_party$
+      - builtin$
+      - examples$

core/dnsserver/server_quic.go

@@ -63,8 +63,7 @@ func NewServerQUIC(addr string, group []*Config) (*ServerQUIC, error) {
 		tlsConfig.NextProtos = []string{"doq"}
 	}
 
-	var quicConfig *quic.Config
-	quicConfig = &quic.Config{
+	var quicConfig = &quic.Config{
 		MaxIdleTimeout:        s.idleTimeout,
 		MaxIncomingStreams:    math.MaxUint16,
 		MaxIncomingUniStreams: math.MaxUint16,

plugin/acl/setup.go

@@ -50,15 +50,16 @@ func parse(c *caddy.Controller) (ACL, error) {
 			p := policy{}
 
 			action := strings.ToLower(c.Val())
-			if action == "allow" {
+			switch action {
+			case "allow":
 				p.action = actionAllow
-			} else if action == "block" {
+			case "block":
 				p.action = actionBlock
-			} else if action == "filter" {
+			case "filter":
 				p.action = actionFilter
-			} else if action == "drop" {
+			case "drop":
 				p.action = actionDrop
-			} else {
+			default:
 				return a, c.Errf("unexpected token %q; expect 'allow', 'block', 'filter' or 'drop'", c.Val())
 			}
 

plugin/auto/auto.go

@@ -54,9 +54,9 @@ func (a Auto) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (i
 		return plugin.NextOrFailure(a.Name(), a.Next, ctx, w, r)
 	}
 
-	a.Zones.RLock()
-	z, ok := a.Zones.Z[zone]
-	a.Zones.RUnlock()
+	a.RLock()
+	z, ok := a.Z[zone]
+	a.RUnlock()
 
 	if !ok || z == nil {
 		return dns.RcodeServerFailure, nil

plugin/auto/setup.go

@@ -48,11 +48,11 @@ func setup(c *caddy.Controller) error {
 		if err := a.Notify(); err != nil {
 			log.Warning(err)
 		}
-		if a.loader.ReloadInterval == 0 {
+		if a.ReloadInterval == 0 {
 			return nil
 		}
 		go func() {
-			ticker := time.NewTicker(a.loader.ReloadInterval)
+			ticker := time.NewTicker(a.ReloadInterval)
 			defer ticker.Stop()
 			for {
 				select {
@@ -71,7 +71,7 @@ func setup(c *caddy.Controller) error {
 
 	c.OnShutdown(func() error {
 		close(walkChan)
-		for _, z := range a.Zones.Z {
+		for _, z := range a.Z {
 			z.Lock()
 			z.OnShutdown()
 			z.Unlock()
@@ -103,8 +103,8 @@ func autoParse(c *caddy.Controller) (Auto, error) {
 	for c.Next() {
 		// auto [ZONES...]
 		args := c.RemainingArgs()
-		a.Zones.origins = plugin.OriginsFromArgsOrServerBlock(args, c.ServerBlockKeys)
-		a.loader.upstream = upstream.New()
+		a.origins = plugin.OriginsFromArgsOrServerBlock(args, c.ServerBlockKeys)
+		a.upstream = upstream.New()
 
 		for c.NextBlock() {
 			switch c.Val() {
@@ -112,33 +112,33 @@ func autoParse(c *caddy.Controller) (Auto, error) {
 				if !c.NextArg() {
 					return a, c.ArgErr()
 				}
-				a.loader.directory = c.Val()
-				if !filepath.IsAbs(a.loader.directory) && config.Root != "" {
-					a.loader.directory = filepath.Join(config.Root, a.loader.directory)
+				a.directory = c.Val()
+				if !filepath.IsAbs(a.directory) && config.Root != "" {
+					a.directory = filepath.Join(config.Root, a.directory)
 				}
-				_, err := os.Stat(a.loader.directory)
+				_, err := os.Stat(a.directory)
 				if err != nil {
 					if os.IsNotExist(err) {
-						log.Warningf("Directory does not exist: %s", a.loader.directory)
+						log.Warningf("Directory does not exist: %s", a.directory)
 					} else {
-						return a, c.Errf("Unable to access root path '%s': %v", a.loader.directory, err)
+						return a, c.Errf("Unable to access root path '%s': %v", a.directory, err)
 					}
 				}
 
 				// regexp template
 				if c.NextArg() {
-					a.loader.re, err = regexp.Compile(c.Val())
+					a.re, err = regexp.Compile(c.Val())
 					if err != nil {
 						return a, err
 					}
-					if a.loader.re.NumSubexp() == 0 {
+					if a.re.NumSubexp() == 0 {
 						return a, c.Errf("Need at least one sub expression")
 					}
 
 					if !c.NextArg() {
 						return a, c.ArgErr()
 					}
-					a.loader.template = rewriteToExpand(c.Val())
+					a.template = rewriteToExpand(c.Val())
 				}
 
 				if c.NextArg() {
@@ -157,7 +157,7 @@ func autoParse(c *caddy.Controller) (Auto, error) {
 				if err != nil {
 					return a, plugin.Error("file", err)
 				}
-				a.loader.ReloadInterval = d
+				a.ReloadInterval = d
 
 			case "upstream":
 				// remove soon
@@ -169,8 +169,8 @@ func autoParse(c *caddy.Controller) (Auto, error) {
 		}
 	}
 
-	if a.loader.ReloadInterval == nilInterval {
-		a.loader.ReloadInterval = 60 * time.Second
+	if a.ReloadInterval == nilInterval {
+		a.ReloadInterval = 60 * time.Second
 	}
 
 	return a, nil

plugin/auto/setup_test.go

@@ -111,17 +111,17 @@ func TestAutoParse(t *testing.T) {
 		} else if err != nil && !test.shouldErr {
 			t.Fatalf("Test %d expected no errors, but got '%v'", i, err)
 		} else if !test.shouldErr {
-			if a.loader.directory != test.expectedDirectory {
-				t.Fatalf("Test %d expected %v, got %v", i, test.expectedDirectory, a.loader.directory)
+			if a.directory != test.expectedDirectory {
+				t.Fatalf("Test %d expected %v, got %v", i, test.expectedDirectory, a.directory)
 			}
-			if a.loader.template != test.expectedTempl {
-				t.Fatalf("Test %d expected %v, got %v", i, test.expectedTempl, a.loader.template)
+			if a.template != test.expectedTempl {
+				t.Fatalf("Test %d expected %v, got %v", i, test.expectedTempl, a.template)
 			}
-			if a.loader.re.String() != test.expectedRe {
-				t.Fatalf("Test %d expected %v, got %v", i, test.expectedRe, a.loader.re)
+			if a.re.String() != test.expectedRe {
+				t.Fatalf("Test %d expected %v, got %v", i, test.expectedRe, a.re)
 			}
-			if a.loader.ReloadInterval != test.expectedReloadInterval {
-				t.Fatalf("Test %d expected %v, got %v", i, test.expectedReloadInterval, a.loader.ReloadInterval)
+			if a.ReloadInterval != test.expectedReloadInterval {
+				t.Fatalf("Test %d expected %v, got %v", i, test.expectedReloadInterval, a.ReloadInterval)
 			}
 		}
 	}

plugin/auto/walk.go

@@ -15,11 +15,11 @@ func (a Auto) Walk() error {
 	// TODO(miek): should add something so that we don't stomp on each other.
 
 	toDelete := make(map[string]bool)
-	for _, n := range a.Zones.Names() {
+	for _, n := range a.Names() {
 		toDelete[n] = true
 	}
 
-	filepath.Walk(a.loader.directory, func(path string, info os.FileInfo, e error) error {
+	filepath.Walk(a.directory, func(path string, info os.FileInfo, e error) error {
 		if e != nil {
 			log.Warningf("error reading %v: %v", path, e)
 		}
@@ -27,12 +27,12 @@ func (a Auto) Walk() error {
 			return nil
 		}
 
-		match, origin := matches(a.loader.re, info.Name(), a.loader.template)
+		match, origin := matches(a.re, info.Name(), a.template)
 		if !match {
 			return nil
 		}
 
-		if z, ok := a.Zones.Z[origin]; ok {
+		if z, ok := a.Z[origin]; ok {
 			// we already have this zone
 			toDelete[origin] = false
 			z.SetFile(path)
@@ -53,10 +53,10 @@ func (a Auto) Walk() error {
 			return nil
 		}
 
-		zo.ReloadInterval = a.loader.ReloadInterval
-		zo.Upstream = a.loader.upstream
+		zo.ReloadInterval = a.ReloadInterval
+		zo.Upstream = a.upstream
 
-		a.Zones.Add(zo, origin, a.transfer)
+		a.Add(zo, origin, a.transfer)
 
 		if a.metrics != nil {
 			a.metrics.AddZone(origin)
@@ -78,7 +78,7 @@ func (a Auto) Walk() error {
 			a.metrics.RemoveZone(origin)
 		}
 
-		a.Zones.Remove(origin)
+		a.Remove(origin)
 
 		log.Infof("Deleting zone `%s'", origin)
 	}

plugin/auto/walk_test.go

@@ -38,7 +38,7 @@ func TestWalk(t *testing.T) {
 
 	// db.example.org and db.example.com should be here (created in createFiles)
 	for _, name := range []string{"example.com.", "example.org."} {
-		if _, ok := a.Zones.Z[name]; !ok {
+		if _, ok := a.Z[name]; !ok {
 			t.Errorf("%s should have been added", name)
 		}
 	}

plugin/auto/watcher_test.go

@@ -27,10 +27,10 @@ func TestWatcher(t *testing.T) {
 	a.Walk()
 
 	// example.org and example.com should exist, we have 3 apex rrs and 1 "real" record. All() returns the non-apex ones.
-	if x := len(a.Zones.Z["example.org."].All()); x != 1 {
+	if x := len(a.Z["example.org."].All()); x != 1 {
 		t.Fatalf("Expected 1 RRs, got %d", x)
 	}
-	if x := len(a.Zones.Z["example.com."].All()); x != 1 {
+	if x := len(a.Z["example.com."].All()); x != 1 {
 		t.Fatalf("Expected 1 RRs, got %d", x)
 	}
 
@@ -41,10 +41,10 @@ func TestWatcher(t *testing.T) {
 
 	a.Walk()
 
-	if _, ok := a.Zones.Z["example.com."]; ok {
+	if _, ok := a.Z["example.com."]; ok {
 		t.Errorf("Expected %q to be gone.", "example.com.")
 	}
-	if _, ok := a.Zones.Z["example.org."]; !ok {
+	if _, ok := a.Z["example.org."]; !ok {
 		t.Errorf("Expected %q to still be there.", "example.org.")
 	}
 }
@@ -83,7 +83,7 @@ func TestSymlinks(t *testing.T) {
 
 	a.Walk()
 
-	if storedZone, ok := a.Zones.Z["example.com."]; ok {
+	if storedZone, ok := a.Z["example.com."]; ok {
 		storedFile := storedZone.File()
 		if storedFile != newFile {
 			t.Errorf("Expected %q to reflect new path %q", storedFile, newFile)

plugin/auto/xfr.go

@@ -8,9 +8,9 @@ import (
 
 // Transfer implements the transfer.Transfer interface.
 func (a Auto) Transfer(zone string, serial uint32) (<-chan []dns.RR, error) {
-	a.Zones.RLock()
-	z, ok := a.Zones.Z[zone]
-	a.Zones.RUnlock()
+	a.RLock()
+	z, ok := a.Z[zone]
+	a.RUnlock()
 
 	if !ok || z == nil {
 		return nil, transfer.ErrNotAuthoritative
@@ -21,7 +21,7 @@ func (a Auto) Transfer(zone string, serial uint32) (<-chan []dns.RR, error) {
 // Notify sends notifies for all zones with secondaries configured with the transfer plugin
 func (a Auto) Notify() error {
 	var err error
-	for _, origin := range a.Zones.Names() {
+	for _, origin := range a.Names() {
 		e := a.transfer.Notify(origin)
 		if e != nil {
 			err = e

plugin/azure/azure.go

@@ -138,26 +138,26 @@ func (h *Azure) updateZones(ctx context.Context) error {
 
 func updateZoneFromPublicResourceSet(recordSet publicdns.RecordSetListResultPage, newZ *file.Zone) {
 	for _, result := range *(recordSet.Response().Value) {
-		resultFqdn := *(result.RecordSetProperties.Fqdn)
-		resultTTL := uint32(*(result.RecordSetProperties.TTL))
-		if result.RecordSetProperties.ARecords != nil {
-			for _, A := range *(result.RecordSetProperties.ARecords) {
+		resultFqdn := *(result.Fqdn)
+		resultTTL := uint32(*(result.TTL))
+		if result.ARecords != nil {
+			for _, A := range *(result.ARecords) {
 				a := &dns.A{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeA, Class: dns.ClassINET, Ttl: resultTTL},
 					A: net.ParseIP(*(A.Ipv4Address))}
 				newZ.Insert(a)
 			}
 		}
 
-		if result.RecordSetProperties.AaaaRecords != nil {
-			for _, AAAA := range *(result.RecordSetProperties.AaaaRecords) {
+		if result.AaaaRecords != nil {
+			for _, AAAA := range *(result.AaaaRecords) {
 				aaaa := &dns.AAAA{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: resultTTL},
 					AAAA: net.ParseIP(*(AAAA.Ipv6Address))}
 				newZ.Insert(aaaa)
 			}
 		}
 
-		if result.RecordSetProperties.MxRecords != nil {
-			for _, MX := range *(result.RecordSetProperties.MxRecords) {
+		if result.MxRecords != nil {
+			for _, MX := range *(result.MxRecords) {
 				mx := &dns.MX{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeMX, Class: dns.ClassINET, Ttl: resultTTL},
 					Preference: uint16(*(MX.Preference)),
 					Mx:         dns.Fqdn(*(MX.Exchange))}
@@ -165,16 +165,16 @@ func updateZoneFromPublicResourceSet(recordSet publicdns.RecordSetListResultPage
 			}
 		}
 
-		if result.RecordSetProperties.PtrRecords != nil {
-			for _, PTR := range *(result.RecordSetProperties.PtrRecords) {
+		if result.PtrRecords != nil {
+			for _, PTR := range *(result.PtrRecords) {
 				ptr := &dns.PTR{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypePTR, Class: dns.ClassINET, Ttl: resultTTL},
 					Ptr: dns.Fqdn(*(PTR.Ptrdname))}
 				newZ.Insert(ptr)
 			}
 		}
 
-		if result.RecordSetProperties.SrvRecords != nil {
-			for _, SRV := range *(result.RecordSetProperties.SrvRecords) {
+		if result.SrvRecords != nil {
+			for _, SRV := range *(result.SrvRecords) {
 				srv := &dns.SRV{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeSRV, Class: dns.ClassINET, Ttl: resultTTL},
 					Priority: uint16(*(SRV.Priority)),
 					Weight:   uint16(*(SRV.Weight)),
@@ -184,24 +184,24 @@ func updateZoneFromPublicResourceSet(recordSet publicdns.RecordSetListResultPage
 			}
 		}
 
-		if result.RecordSetProperties.TxtRecords != nil {
-			for _, TXT := range *(result.RecordSetProperties.TxtRecords) {
+		if result.TxtRecords != nil {
+			for _, TXT := range *(result.TxtRecords) {
 				txt := &dns.TXT{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeTXT, Class: dns.ClassINET, Ttl: resultTTL},
 					Txt: *(TXT.Value)}
 				newZ.Insert(txt)
 			}
 		}
 
-		if result.RecordSetProperties.NsRecords != nil {
-			for _, NS := range *(result.RecordSetProperties.NsRecords) {
+		if result.NsRecords != nil {
+			for _, NS := range *(result.NsRecords) {
 				ns := &dns.NS{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeNS, Class: dns.ClassINET, Ttl: resultTTL},
 					Ns: *(NS.Nsdname)}
 				newZ.Insert(ns)
 			}
 		}
 
-		if result.RecordSetProperties.SoaRecord != nil {
-			SOA := result.RecordSetProperties.SoaRecord
+		if result.SoaRecord != nil {
+			SOA := result.SoaRecord
 			soa := &dns.SOA{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeSOA, Class: dns.ClassINET, Ttl: resultTTL},
 				Minttl:  uint32(*(SOA.MinimumTTL)),
 				Expire:  uint32(*(SOA.ExpireTime)),
@@ -213,8 +213,8 @@ func updateZoneFromPublicResourceSet(recordSet publicdns.RecordSetListResultPage
 			newZ.Insert(soa)
 		}
 
-		if result.RecordSetProperties.CnameRecord != nil {
-			CNAME := result.RecordSetProperties.CnameRecord.Cname
+		if result.CnameRecord != nil {
+			CNAME := result.CnameRecord.Cname
 			cname := &dns.CNAME{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeCNAME, Class: dns.ClassINET, Ttl: resultTTL},
 				Target: dns.Fqdn(*CNAME)}
 			newZ.Insert(cname)
@@ -224,25 +224,25 @@ func updateZoneFromPublicResourceSet(recordSet publicdns.RecordSetListResultPage
 
 func updateZoneFromPrivateResourceSet(recordSet privatedns.RecordSetListResultPage, newZ *file.Zone) {
 	for _, result := range *(recordSet.Response().Value) {
-		resultFqdn := *(result.RecordSetProperties.Fqdn)
-		resultTTL := uint32(*(result.RecordSetProperties.TTL))
-		if result.RecordSetProperties.ARecords != nil {
-			for _, A := range *(result.RecordSetProperties.ARecords) {
+		resultFqdn := *(result.Fqdn)
+		resultTTL := uint32(*(result.TTL))
+		if result.ARecords != nil {
+			for _, A := range *(result.ARecords) {
 				a := &dns.A{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeA, Class: dns.ClassINET, Ttl: resultTTL},
 					A: net.ParseIP(*(A.Ipv4Address))}
 				newZ.Insert(a)
 			}
 		}
-		if result.RecordSetProperties.AaaaRecords != nil {
-			for _, AAAA := range *(result.RecordSetProperties.AaaaRecords) {
+		if result.AaaaRecords != nil {
+			for _, AAAA := range *(result.AaaaRecords) {
 				aaaa := &dns.AAAA{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: resultTTL},
 					AAAA: net.ParseIP(*(AAAA.Ipv6Address))}
 				newZ.Insert(aaaa)
 			}
 		}
 
-		if result.RecordSetProperties.MxRecords != nil {
-			for _, MX := range *(result.RecordSetProperties.MxRecords) {
+		if result.MxRecords != nil {
+			for _, MX := range *(result.MxRecords) {
 				mx := &dns.MX{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeMX, Class: dns.ClassINET, Ttl: resultTTL},
 					Preference: uint16(*(MX.Preference)),
 					Mx:         dns.Fqdn(*(MX.Exchange))}
@@ -250,16 +250,16 @@ func updateZoneFromPrivateResourceSet(recordSet privatedns.RecordSetListResultPa
 			}
 		}
 
-		if result.RecordSetProperties.PtrRecords != nil {
-			for _, PTR := range *(result.RecordSetProperties.PtrRecords) {
+		if result.PtrRecords != nil {
+			for _, PTR := range *(result.PtrRecords) {
 				ptr := &dns.PTR{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypePTR, Class: dns.ClassINET, Ttl: resultTTL},
 					Ptr: dns.Fqdn(*(PTR.Ptrdname))}
 				newZ.Insert(ptr)
 			}
 		}
 
-		if result.RecordSetProperties.SrvRecords != nil {
-			for _, SRV := range *(result.RecordSetProperties.SrvRecords) {
+		if result.SrvRecords != nil {
+			for _, SRV := range *(result.SrvRecords) {
 				srv := &dns.SRV{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeSRV, Class: dns.ClassINET, Ttl: resultTTL},
 					Priority: uint16(*(SRV.Priority)),
 					Weight:   uint16(*(SRV.Weight)),
@@ -269,16 +269,16 @@ func updateZoneFromPrivateResourceSet(recordSet privatedns.RecordSetListResultPa
 			}
 		}
 
-		if result.RecordSetProperties.TxtRecords != nil {
-			for _, TXT := range *(result.RecordSetProperties.TxtRecords) {
+		if result.TxtRecords != nil {
+			for _, TXT := range *(result.TxtRecords) {
 				txt := &dns.TXT{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeTXT, Class: dns.ClassINET, Ttl: resultTTL},
 					Txt: *(TXT.Value)}
 				newZ.Insert(txt)
 			}
 		}
 
-		if result.RecordSetProperties.SoaRecord != nil {
-			SOA := result.RecordSetProperties.SoaRecord
+		if result.SoaRecord != nil {
+			SOA := result.SoaRecord
 			soa := &dns.SOA{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeSOA, Class: dns.ClassINET, Ttl: resultTTL},
 				Minttl:  uint32(*(SOA.MinimumTTL)),
 				Expire:  uint32(*(SOA.ExpireTime)),
@@ -290,8 +290,8 @@ func updateZoneFromPrivateResourceSet(recordSet privatedns.RecordSetListResultPa
 			newZ.Insert(soa)
 		}
 
-		if result.RecordSetProperties.CnameRecord != nil {
-			CNAME := result.RecordSetProperties.CnameRecord.Cname
+		if result.CnameRecord != nil {
+			CNAME := result.CnameRecord.Cname
 			cname := &dns.CNAME{Hdr: dns.RR_Header{Name: resultFqdn, Rrtype: dns.TypeCNAME, Class: dns.ClassINET, Ttl: resultTTL},
 				Target: dns.Fqdn(*CNAME)}
 			newZ.Insert(cname)

plugin/cache/cache.go

@@ -189,11 +189,12 @@ func (w *ResponseWriter) WriteMsg(res *dns.Msg) error {
 
 	msgTTL := dnsutil.MinimalTTL(res, mt)
 	var duration time.Duration
-	if mt == response.NameError || mt == response.NoData {
+	switch mt {
+	case response.NameError, response.NoData:
 		duration = computeTTL(msgTTL, w.minnttl, w.nttl)
-	} else if mt == response.ServerError {
+	case response.ServerError:
 		duration = w.failttl
-	} else {
+	default:
 		duration = computeTTL(msgTTL, w.minpttl, w.pttl)
 	}
 

plugin/cache/cache_test.go

@@ -467,14 +467,15 @@ func TestServeFromStaleCacheFetchVerify(t *testing.T) {
 		rec := dnstest.NewRecorder(&test.ResponseWriter{})
 		c.now = func() time.Time { return time.Now().Add(time.Duration(tt.futureMinutes) * time.Minute) }
 
-		if tt.upstreamRCode == dns.RcodeSuccess {
+		switch tt.upstreamRCode {
+		case dns.RcodeSuccess:
 			c.Next = ttlBackend(tt.upstreamTtl)
-		} else if tt.upstreamRCode == dns.RcodeServerFailure {
+		case dns.RcodeServerFailure:
 			// Make upstream fail, should now rely on cache during the c.staleUpTo period
 			c.Next = servFailBackend(tt.upstreamTtl)
-		} else if tt.upstreamRCode == dns.RcodeNameError {
+		case dns.RcodeNameError:
 			c.Next = nxDomainBackend(tt.upstreamTtl)
-		} else {
+		default:
 			t.Fatal("upstream code not implemented")
 		}
 
@@ -485,12 +486,13 @@ func TestServeFromStaleCacheFetchVerify(t *testing.T) {
 			t.Errorf("Test %d: expected rcode=%v, got rcode=%v", i, tt.expectedRCode, ret)
 			continue
 		}
-		if ret == dns.RcodeSuccess {
+		switch ret {
+		case dns.RcodeSuccess:
 			recTtl := rec.Msg.Answer[0].Header().Ttl
 			if tt.expectedTtl != int(recTtl) {
 				t.Errorf("Test %d: expected TTL=%d, got TTL=%d", i, tt.expectedTtl, recTtl)
 			}
-		} else if ret == dns.RcodeNameError {
+		case dns.RcodeNameError:
 			soaTtl := rec.Msg.Ns[0].Header().Ttl
 			if tt.expectedTtl != int(soaTtl) {
 				t.Errorf("Test %d: expected TTL=%d, got TTL=%d", i, tt.expectedTtl, soaTtl)
@@ -631,7 +633,7 @@ func nxDomainBackend(ttl int) plugin.Handler {
 
 		m.Ns = []dns.RR{test.SOA(fmt.Sprintf("example.org. %d IN	SOA	sns.dns.icann.org. noc.dns.icann.org. 2016082540 7200 3600 1209600 3600", ttl))}
 
-		m.MsgHdr.Rcode = dns.RcodeNameError
+		m.Rcode = dns.RcodeNameError
 		w.WriteMsg(m)
 		return dns.RcodeNameError, nil
 	})
@@ -657,7 +659,7 @@ func servFailBackend(ttl int) plugin.Handler {
 
 		m.Ns = []dns.RR{test.SOA(fmt.Sprintf("example.org. %d IN	SOA	sns.dns.icann.org. noc.dns.icann.org. 2016082540 7200 3600 1209600 3600", ttl))}
 
-		m.MsgHdr.Rcode = dns.RcodeServerFailure
+		m.Rcode = dns.RcodeServerFailure
 		w.WriteMsg(m)
 		return dns.RcodeServerFailure, nil
 	})

plugin/cache/handler.go

@@ -100,7 +100,7 @@ func (c *Cache) doPrefetch(ctx context.Context, state request.Request, cw *Respo
 	// that we've gathered sofar. See we copy the frequencies info back
 	// into the new item that was stored in the cache.
 	if i1 := c.exists(state); i1 != nil {
-		i1.Freq.Reset(now, i.Freq.Hits())
+		i1.Reset(now, i.Hits())
 	}
 }
 
@@ -112,9 +112,9 @@ func (c *Cache) shouldPrefetch(i *item, now time.Time) bool {
 	if c.prefetch <= 0 {
 		return false
 	}
-	i.Freq.Update(c.duration, now)
+	i.Update(c.duration, now)
 	threshold := int(math.Ceil(float64(c.percentage) / 100 * float64(i.origTTL)))
-	return i.Freq.Hits() >= c.prefetch && i.ttl(now) <= threshold
+	return i.Hits() >= c.prefetch && i.ttl(now) <= threshold
 }
 
 // Name implements the Handler interface.

plugin/dns64/dns64.go

@@ -62,7 +62,7 @@ func (d *DNS64) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg)
 
 	RequestsTranslatedCount.WithLabelValues(metrics.WithServer(ctx)).Inc()
 	w.WriteMsg(msg)
-	return msg.MsgHdr.Rcode, nil
+	return msg.Rcode, nil
 }
 
 // Name implements the Handler interface.

plugin/dnssec/setup.go

@@ -117,7 +117,8 @@ func keyParse(c *caddy.Controller) ([]*DNSKEY, error) {
 		return nil, c.ArgErr()
 	}
 	value := c.Val()
-	if value == "file" {
+	switch value {
+	case "file":
 		ks := c.RemainingArgs()
 		if len(ks) == 0 {
 			return nil, c.ArgErr()
@@ -141,7 +142,7 @@ func keyParse(c *caddy.Controller) ([]*DNSKEY, error) {
 			}
 			keys = append(keys, k)
 		}
-	} else if value == "aws_secretsmanager" {
+	case "aws_secretsmanager":
 		ks := c.RemainingArgs()
 		if len(ks) == 0 {
 			return nil, c.ArgErr()

plugin/file/closest.go

@@ -10,7 +10,7 @@ import (
 func (z *Zone) ClosestEncloser(qname string) (*tree.Elem, bool) {
 	offset, end := dns.NextLabel(qname, 0)
 	for !end {
-		elem, _ := z.Tree.Search(qname)
+		elem, _ := z.Search(qname)
 		if elem != nil {
 			return elem, true
 		}
@@ -19,5 +19,5 @@ func (z *Zone) ClosestEncloser(qname string) (*tree.Elem, bool) {
 		offset, end = dns.NextLabel(qname, offset)
 	}
 
-	return z.Tree.Search(z.origin)
+	return z.Search(z.origin)
 }

plugin/file/file.go

@@ -42,7 +42,7 @@ func (f File) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg) (i
 		return plugin.NextOrFailure(f.Name(), f.Next, ctx, w, r)
 	}
 
-	z, ok := f.Zones.Z[zone]
+	z, ok := f.Z[zone]
 	if !ok || z == nil {
 		return dns.RcodeServerFailure, nil
 	}

plugin/file/lookup.go

@@ -330,11 +330,11 @@ func (z *Zone) externalLookup(ctx context.Context, state request.Request, elem *
 	}
 
 	targetName := rrs[0].(*dns.CNAME).Target
-	elem, _ = z.Tree.Search(targetName)
+	elem, _ = z.Search(targetName)
 	if elem == nil {
 		lookupRRs, result := z.doLookup(ctx, state, targetName, qtype)
 		rrs = append(rrs, lookupRRs...)
-		return rrs, z.Apex.ns(do), nil, result
+		return rrs, z.ns(do), nil, result
 	}
 
 	i := 0
@@ -350,16 +350,16 @@ Redo:
 			rrs = append(rrs, sigs...)
 		}
 		targetName := cname[0].(*dns.CNAME).Target
-		elem, _ = z.Tree.Search(targetName)
+		elem, _ = z.Search(targetName)
 		if elem == nil {
 			lookupRRs, result := z.doLookup(ctx, state, targetName, qtype)
 			rrs = append(rrs, lookupRRs...)
-			return rrs, z.Apex.ns(do), nil, result
+			return rrs, z.ns(do), nil, result
 		}
 
 		i++
 		if i > 8 {
-			return rrs, z.Apex.ns(do), nil, Success
+			return rrs, z.ns(do), nil, Success
 		}
 
 		goto Redo
@@ -376,7 +376,7 @@ Redo:
 		}
 	}
 
-	return rrs, z.Apex.ns(do), nil, Success
+	return rrs, z.ns(do), nil, Success
 }
 
 func (z *Zone) doLookup(ctx context.Context, state request.Request, target string, qtype uint16) ([]dns.RR, Result) {
@@ -414,7 +414,7 @@ func (z *Zone) additionalProcessing(answer []dns.RR, do bool) (extra []dns.RR) {
 			continue
 		}
 
-		elem, _ := z.Tree.Search(name)
+		elem, _ := z.Search(name)
 		if elem == nil {
 			continue
 		}

plugin/file/reload.go

@@ -42,7 +42,7 @@ func (z *Zone) Reload(t *transfer.Transfer) error {
 				z.Tree = zone.Tree
 				z.Unlock()
 
-				log.Infof("Successfully reloaded zone %q in %q with %d SOA serial", z.origin, zFile, z.Apex.SOA.Serial)
+				log.Infof("Successfully reloaded zone %q in %q with %d SOA serial", z.origin, zFile, z.SOA.Serial)
 				if t != nil {
 					if err := t.Notify(z.origin); err != nil {
 						log.Warningf("Failed sending notifies: %s", err)
@@ -62,8 +62,8 @@ func (z *Zone) Reload(t *transfer.Transfer) error {
 func (z *Zone) SOASerialIfDefined() int64 {
 	z.RLock()
 	defer z.RUnlock()
-	if z.Apex.SOA != nil {
-		return int64(z.Apex.SOA.Serial)
+	if z.SOA != nil {
+		return int64(z.SOA.Serial)
 	}
 	return -1
 }

plugin/file/secondary.go

@@ -89,10 +89,10 @@ Transfer:
 	if serial == -1 {
 		return false, Err
 	}
-	if z.Apex.SOA == nil {
+	if z.SOA == nil {
 		return true, Err
 	}
-	return less(z.Apex.SOA.Serial, uint32(serial)), Err
+	return less(z.SOA.Serial, uint32(serial)), Err
 }
 
 // less returns true of a is smaller than b when taking RFC 1982 serial arithmetic into account.
@@ -109,15 +109,15 @@ func less(a, b uint32) bool {
 // will be marked expired.
 func (z *Zone) Update() error {
 	// If we don't have a SOA, we don't have a zone, wait for it to appear.
-	for z.Apex.SOA == nil {
+	for z.SOA == nil {
 		time.Sleep(1 * time.Second)
 	}
 	retryActive := false
 
 Restart:
-	refresh := time.Second * time.Duration(z.Apex.SOA.Refresh)
-	retry := time.Second * time.Duration(z.Apex.SOA.Retry)
-	expire := time.Second * time.Duration(z.Apex.SOA.Expire)
+	refresh := time.Second * time.Duration(z.SOA.Refresh)
+	retry := time.Second * time.Duration(z.SOA.Retry)
+	expire := time.Second * time.Duration(z.SOA.Expire)
 
 	refreshTicker := time.NewTicker(refresh)
 	retryTicker := time.NewTicker(retry)

plugin/file/secondary_test.go

@@ -84,7 +84,7 @@ func TestShouldTransfer(t *testing.T) {
 		t.Fatalf("ShouldTransfer should return true for serial: %d", soa.serial)
 	}
 	// Serial smaller
-	z.Apex.SOA = test.SOA(fmt.Sprintf("%s IN SOA bla. bla. %d 0 0 0 0 ", testZone, soa.serial-1))
+	z.SOA = test.SOA(fmt.Sprintf("%s IN SOA bla. bla. %d 0 0 0 0 ", testZone, soa.serial-1))
 	should, err = z.shouldTransfer()
 	if err != nil {
 		t.Fatalf("Unable to run shouldTransfer: %v", err)
@@ -93,7 +93,7 @@ func TestShouldTransfer(t *testing.T) {
 		t.Fatalf("ShouldTransfer should return true for serial: %q", soa.serial-1)
 	}
 	// Serial equal
-	z.Apex.SOA = test.SOA(fmt.Sprintf("%s IN SOA bla. bla. %d 0 0 0 0 ", testZone, soa.serial))
+	z.SOA = test.SOA(fmt.Sprintf("%s IN SOA bla. bla. %d 0 0 0 0 ", testZone, soa.serial))
 	should, err = z.shouldTransfer()
 	if err != nil {
 		t.Fatalf("Unable to run shouldTransfer: %v", err)
@@ -116,7 +116,7 @@ func TestTransferIn(t *testing.T) {
 	if err := z.TransferIn(); err != nil {
 		t.Fatalf("Unable to run TransferIn: %v", err)
 	}
-	if z.Apex.SOA.String() != fmt.Sprintf("%s	3600	IN	SOA	bla. bla. 250 0 0 0 0", testZone) {
+	if z.SOA.String() != fmt.Sprintf("%s	3600	IN	SOA	bla. bla. 250 0 0 0 0", testZone) {
 		t.Fatalf("Unknown SOA transferred")
 	}
 }

plugin/file/xfr.go

@@ -9,7 +9,7 @@ import (
 
 // Transfer implements the transfer.Transfer interface.
 func (f File) Transfer(zone string, serial uint32) (<-chan []dns.RR, error) {
-	z, ok := f.Zones.Z[zone]
+	z, ok := f.Z[zone]
 	if !ok || z == nil {
 		return nil, transfer.ErrNotAuthoritative
 	}

plugin/file/zone.go

@@ -80,14 +80,14 @@ func (z *Zone) Insert(r dns.RR) error {
 		r.(*dns.NS).Ns = strings.ToLower(r.(*dns.NS).Ns)
 
 		if r.Header().Name == z.origin {
-			z.Apex.NS = append(z.Apex.NS, r)
+			z.NS = append(z.NS, r)
 			return nil
 		}
 	case dns.TypeSOA:
 		r.(*dns.SOA).Ns = strings.ToLower(r.(*dns.SOA).Ns)
 		r.(*dns.SOA).Mbox = strings.ToLower(r.(*dns.SOA).Mbox)
 
-		z.Apex.SOA = r.(*dns.SOA)
+		z.SOA = r.(*dns.SOA)
 		return nil
 	case dns.TypeNSEC3, dns.TypeNSEC3PARAM:
 		return fmt.Errorf("NSEC3 zone is not supported, dropping RR: %s for zone: %s", r.Header().Name, z.origin)
@@ -95,11 +95,11 @@ func (z *Zone) Insert(r dns.RR) error {
 		x := r.(*dns.RRSIG)
 		switch x.TypeCovered {
 		case dns.TypeSOA:
-			z.Apex.SIGSOA = append(z.Apex.SIGSOA, x)
+			z.SIGSOA = append(z.SIGSOA, x)
 			return nil
 		case dns.TypeNS:
 			if r.Header().Name == z.origin {
-				z.Apex.SIGNS = append(z.Apex.SIGNS, x)
+				z.SIGNS = append(z.SIGNS, x)
 				return nil
 			}
 		}
@@ -133,20 +133,20 @@ func (z *Zone) SetFile(path string) {
 func (z *Zone) ApexIfDefined() ([]dns.RR, error) {
 	z.RLock()
 	defer z.RUnlock()
-	if z.Apex.SOA == nil {
+	if z.SOA == nil {
 		return nil, fmt.Errorf("no SOA")
 	}
 
-	rrs := []dns.RR{z.Apex.SOA}
+	rrs := []dns.RR{z.SOA}
 
-	if len(z.Apex.SIGSOA) > 0 {
-		rrs = append(rrs, z.Apex.SIGSOA...)
+	if len(z.SIGSOA) > 0 {
+		rrs = append(rrs, z.SIGSOA...)
 	}
-	if len(z.Apex.NS) > 0 {
-		rrs = append(rrs, z.Apex.NS...)
+	if len(z.NS) > 0 {
+		rrs = append(rrs, z.NS...)
 	}
-	if len(z.Apex.SIGNS) > 0 {
-		rrs = append(rrs, z.Apex.SIGNS...)
+	if len(z.SIGNS) > 0 {
+		rrs = append(rrs, z.SIGNS...)
 	}
 
 	return rrs, nil

plugin/geoip/geoip.go

@@ -91,8 +91,8 @@ func (g GeoIP) Metadata(ctx context.Context, state request.Request) context.Cont
 		}
 	}
 
-	switch {
-	case g.db.provides&city == city:
+	switch g.db.provides & city {
+	case city:
 		data, err := g.db.City(srcIP)
 		if err != nil {
 			log.Debugf("Setting up metadata failed due to database lookup error: %v", err)

plugin/header/setup.go

@@ -37,7 +37,8 @@ func parse(c *caddy.Controller) ([]Rule, []Rule, error) {
 			selector := strings.ToLower(c.Val())
 
 			var action string
-			if selector == "set" || selector == "clear" {
+			switch selector {
+			case "set", "clear":
 				log.Warningf("The selector for header rule in line %d isn't explicit defined. "+
 					"Assume rule applies for selector 'response'. This syntax is deprecated. "+
 					"In future versions of CoreDNS the selector must be explicit defined.",
@@ -45,11 +46,11 @@ func parse(c *caddy.Controller) ([]Rule, []Rule, error) {
 
 				action = selector
 				selector = "response"
-			} else if selector == "query" || selector == "response" {
+			case "query", "response":
 				if c.NextArg() {
 					action = c.Val()
 				}
-			} else {
+			default:
 				return nil, nil, fmt.Errorf("setting up rule: invalid selector=%s should be query or response", selector)
 			}
 

plugin/k8s_external/transfer_test.go

@@ -13,8 +13,7 @@ import (
 )
 
 func TestImplementsTransferer(t *testing.T) {
-	var e plugin.Handler
-	e = &External{}
+	var e plugin.Handler = &External{}
 	_, ok := e.(transfer.Transferer)
 	if !ok {
 		t.Error("Transferer not implemented")

plugin/kubernetes/controller_test.go

@@ -140,8 +140,8 @@ func generateEndpointSlices(cidr string, client kubernetes.Interface) {
 				Hostname:  &hostname,
 			},
 		}
-		eps.ObjectMeta.Name = "svc" + strconv.Itoa(count)
-		eps.ObjectMeta.Labels = map[string]string{discovery.LabelServiceName: eps.ObjectMeta.Name}
+		eps.Name = "svc" + strconv.Itoa(count)
+		eps.Labels = map[string]string{discovery.LabelServiceName: eps.Name}
 		_, err := client.DiscoveryV1().EndpointSlices("testns").Create(ctx, eps, meta.CreateOptions{})
 		if err != nil {
 			log.Fatal(err)
@@ -175,11 +175,12 @@ func generateSvcs(cidr string, svcType string, client kubernetes.Interface) {
 		}
 	default:
 		for ip := ip.Mask(ipnet.Mask); ipnet.Contains(ip); inc(ip) {
-			if count%3 == 0 {
+			switch count % 3 {
+			case 0:
 				createClusterIPSvc(count, client, ip)
-			} else if count%3 == 1 {
+			case 1:
 				createHeadlessSvc(count, client, ip)
-			} else if count%3 == 2 {
+			case 2:
 				createExternalSvc(count, client, ip)
 			}
 			count++

plugin/kubernetes/external.go

@@ -62,10 +62,11 @@ func (k *Kubernetes) External(state request.Request, headless bool) ([]msg.Servi
 
 	service := segs[last]
 	last--
-	if last == 0 {
+	switch last {
+	case 0:
 		endpoint = stripUnderscore(segs[last])
 		last--
-	} else if last == 1 {
+	case 1:
 		protocol = stripUnderscore(segs[last])
 		port = stripUnderscore(segs[last-1])
 		last -= 2

plugin/kubernetes/kubernetes.go

@@ -332,10 +332,10 @@ func endpointHostname(addr object.EndpointAddress, endpointNameMode bool) string
 		return addr.TargetRefName
 	}
 	if strings.Contains(addr.IP, ".") {
-		return strings.Replace(addr.IP, ".", "-", -1)
+		return strings.ReplaceAll(addr.IP, ".", "-")
 	}
 	if strings.Contains(addr.IP, ":") {
-		return strings.Replace(addr.IP, ":", "-", -1)
+		return strings.ReplaceAll(addr.IP, ":", "-")
 	}
 	return ""
 }
@@ -428,7 +428,7 @@ func (k *Kubernetes) findServices(r recordRequest, zone string) (services []msg.
 
 	zonePath := msg.Path(zone, coredns)
 	for _, svc := range serviceList {
-		if !(match(r.namespace, svc.Namespace) && match(r.service, svc.Name)) {
+		if !match(r.namespace, svc.Namespace) || !match(r.service, svc.Name) {
 			continue
 		}
 

plugin/kubernetes/object/pod.go

@@ -36,7 +36,7 @@ func ToPod(obj meta.Object) (meta.Object, error) {
 		Name:      apiPod.GetName(),
 		Labels:    apiPod.GetLabels(),
 	}
-	t := apiPod.ObjectMeta.DeletionTimestamp
+	t := apiPod.DeletionTimestamp
 	if t != nil && !(*t).Time.IsZero() {
 		// if the pod is in the process of termination, return an error so it can be ignored
 		// during add/update event processing

plugin/loadbalance/setup.go

@@ -15,7 +15,7 @@ import (
 )
 
 var log = clog.NewWithPlugin("loadbalance")
-var errOpen = errors.New("Weight file open error")
+var errOpen = errors.New("weight file open error")
 
 func init() { plugin.Register("loadbalance", setup) }
 

plugin/loadbalance/weighted.go

@@ -90,7 +90,7 @@ func createWeightedFuncs(weightFileName string,
 			randomGen: &randomUint{},
 		},
 	}
-	lb.weighted.randomGen.randInit()
+	lb.weighted.randInit()
 
 	lb.shuffleFunc = func(res *dns.Msg) *dns.Msg {
 		return weightedShuffle(res, lb.weighted)
@@ -285,7 +285,7 @@ func (w *weightedRR) parseWeights(scanner *bufio.Scanner) (map[string]weights, e
 		case 1:
 			// (domain) name sanity check
 			if net.ParseIP(fields[0]) != nil {
-				return nil, fmt.Errorf("Wrong domain name:\"%s\" in weight file %s. (Maybe a missing weight value?)",
+				return nil, fmt.Errorf("wrong domain name:\"%s\" in weight file %s. (Maybe a missing weight value?)",
 					fields[0], w.fileName)
 			}
 			dname = fields[0]
@@ -304,25 +304,25 @@ func (w *weightedRR) parseWeights(scanner *bufio.Scanner) (map[string]weights, e
 			// IP address and weight value
 			ip := net.ParseIP(fields[0])
 			if ip == nil {
-				return nil, fmt.Errorf("Wrong IP address:\"%s\" in weight file %s", fields[0], w.fileName)
+				return nil, fmt.Errorf("wrong IP address:\"%s\" in weight file %s", fields[0], w.fileName)
 			}
 			weight, err := strconv.ParseUint(fields[1], 10, 8)
 			if err != nil || weight == 0 {
-				return nil, fmt.Errorf("Wrong weight value:\"%s\" in weight file %s", fields[1], w.fileName)
+				return nil, fmt.Errorf("wrong weight value:\"%s\" in weight file %s", fields[1], w.fileName)
 			}
 			witem := &weightItem{address: ip, value: uint8(weight)}
 			if dname == "" {
-				return nil, fmt.Errorf("Missing domain name in weight file %s", w.fileName)
+				return nil, fmt.Errorf("missing domain name in weight file %s", w.fileName)
 			}
 			ws = append(ws, witem)
 			domains[dname] = ws
 		default:
-			return nil, fmt.Errorf("Could not parse weight line:\"%s\" in weight file %s", nextLine, w.fileName)
+			return nil, fmt.Errorf("could not parse weight line:\"%s\" in weight file %s", nextLine, w.fileName)
 		}
 	}
 
 	if err := scanner.Err(); err != nil {
-		return nil, fmt.Errorf("Weight file %s parsing error:%s", w.fileName, err)
+		return nil, fmt.Errorf("weight file %s parsing error:%s", w.fileName, err)
 	}
 
 	return domains, nil

plugin/loadbalance/weighted_test.go

@@ -96,11 +96,11 @@ func TestWeightFileUpdate(t *testing.T) {
 		{oneDomainWRR, false, testOneDomainWRR, ""},
 		{twoDomainsWRR, false, testTwoDomainsWRR, ""},
 		// negative
-		{missingWeightWRR, true, nil, "Wrong domain name"},
-		{missingDomainWRR, true, nil, "Missing domain name"},
-		{wrongIpWRR, true, nil, "Wrong IP address"},
-		{wrongWeightWRR, true, nil, "Wrong weight value"},
-		{zeroWeightWRR, true, nil, "Wrong weight value"},
+		{missingWeightWRR, true, nil, "wrong domain name"},
+		{missingDomainWRR, true, nil, "missing domain name"},
+		{wrongIpWRR, true, nil, "wrong IP address"},
+		{wrongWeightWRR, true, nil, "wrong weight value"},
+		{zeroWeightWRR, true, nil, "wrong weight value"},
 	}
 
 	for i, test := range tests {

plugin/log/setup.go

@@ -54,8 +54,8 @@ func logParse(c *caddy.Controller) ([]Rule, error) {
 
 			if strings.Contains(args[len(args)-1], "{") {
 				format = args[len(args)-1]
-				format = strings.Replace(format, "{common}", CommonLogFormat, -1)
-				format = strings.Replace(format, "{combined}", CombinedLogFormat, -1)
+				format = strings.ReplaceAll(format, "{common}", CommonLogFormat)
+				format = strings.ReplaceAll(format, "{combined}", CombinedLogFormat)
 				args = args[:len(args)-1]
 			}
 

plugin/pkg/proxy/health.go

@@ -119,7 +119,7 @@ func (h *dnsHc) Check(p *Proxy) error {
 func (h *dnsHc) send(addr string) error {
 	ping := new(dns.Msg)
 	ping.SetQuestion(h.domain, dns.TypeNS)
-	ping.MsgHdr.RecursionDesired = h.recursionDesired
+	ping.RecursionDesired = h.recursionDesired
 
 	m, _, err := h.c.Exchange(ping, addr)
 	// If we got a header, we're alright, basically only care about I/O errors 'n stuff.

plugin/pkg/replacer/replacer_test.go

@@ -21,7 +21,7 @@ func TestReplacer(t *testing.T) {
 	w := dnstest.NewRecorder(&test.ResponseWriter{})
 	r := new(dns.Msg)
 	r.SetQuestion("example.org.", dns.TypeHINFO)
-	r.MsgHdr.AuthenticatedData = true
+	r.AuthenticatedData = true
 	state := request.Request{W: w, Req: r}
 
 	replacer := New()
@@ -269,7 +269,7 @@ func BenchmarkReplacer(b *testing.B) {
 	w := dnstest.NewRecorder(&test.ResponseWriter{})
 	r := new(dns.Msg)
 	r.SetQuestion("example.org.", dns.TypeHINFO)
-	r.MsgHdr.AuthenticatedData = true
+	r.AuthenticatedData = true
 	state := request.Request{W: w, Req: r}
 
 	b.ResetTimer()
@@ -288,7 +288,7 @@ func BenchmarkReplacer_CommonLogFormat(b *testing.B) {
 	r.Id = 1053
 	r.AuthenticatedData = true
 	r.CheckingDisabled = true
-	r.MsgHdr.AuthenticatedData = true
+	r.AuthenticatedData = true
 	w.WriteMsg(r)
 	state := request.Request{W: w, Req: r}
 

plugin/rewrite/cname_target.go

@@ -49,7 +49,7 @@ func (r *cnameTargetRule) getFromAndToTarget(inputCName string) (from string, to
 		}
 	case SubstringMatch:
 		if strings.Contains(inputCName, r.paramFromTarget) {
-			return inputCName, strings.Replace(inputCName, r.paramFromTarget, r.paramToTarget, -1)
+			return inputCName, strings.ReplaceAll(inputCName, r.paramFromTarget, r.paramToTarget)
 		}
 	case RegexMatch:
 		pattern := regexp.MustCompile(r.paramFromTarget)
@@ -60,7 +60,7 @@ func (r *cnameTargetRule) getFromAndToTarget(inputCName string) (from string, to
 		substitution := r.paramToTarget
 		for groupIndex, groupValue := range regexGroups {
 			groupIndexStr := "{" + strconv.Itoa(groupIndex) + "}"
-			substitution = strings.Replace(substitution, groupIndexStr, groupValue, -1)
+			substitution = strings.ReplaceAll(substitution, groupIndexStr, groupValue)
 		}
 		return inputCName, substitution
 	}

plugin/rewrite/name.go

@@ -40,7 +40,7 @@ func (r *regexStringRewriter) rewriteString(src string) string {
 	s := r.replacement
 	for groupIndex, groupValue := range regexGroups {
 		groupIndexStr := "{" + strconv.Itoa(groupIndex) + "}"
-		s = strings.Replace(s, groupIndexStr, groupValue, -1)
+		s = strings.ReplaceAll(s, groupIndexStr, groupValue)
 	}
 	return s
 }
@@ -257,7 +257,7 @@ func newSubstringNameRule(nextAction string, auto bool, substring, replacement s
 
 func (rule *substringNameRule) Rewrite(ctx context.Context, state request.Request) (ResponseRules, Result) {
 	if strings.Contains(state.Name(), rule.substring) {
-		state.Req.Question[0].Name = strings.Replace(state.Name(), rule.substring, rule.replacement, -1)
+		state.Req.Question[0].Name = strings.ReplaceAll(state.Name(), rule.substring, rule.replacement)
 		return rule.responseRuleFor(state)
 	}
 	return nil, RewriteIgnored
@@ -285,7 +285,7 @@ func (rule *regexNameRule) Rewrite(ctx context.Context, state request.Request) (
 	s := rule.replacement
 	for groupIndex, groupValue := range regexGroups {
 		groupIndexStr := "{" + strconv.Itoa(groupIndex) + "}"
-		s = strings.Replace(s, groupIndexStr, groupValue, -1)
+		s = strings.ReplaceAll(s, groupIndexStr, groupValue)
 	}
 	state.Req.Question[0].Name = s
 	return rule.responseRuleFor(state)

plugin/rewrite/rcode.go

@@ -19,8 +19,8 @@ type rcodeResponseRule struct {
 }
 
 func (r *rcodeResponseRule) RewriteResponse(res *dns.Msg, rr dns.RR) {
-	if r.old == res.MsgHdr.Rcode {
-		res.MsgHdr.Rcode = r.new
+	if r.old == res.Rcode {
+		res.Rcode = r.new
 	}
 }
 

plugin/rewrite/rcode_test.go

@@ -60,13 +60,13 @@ func TestRCodeRewrite(t *testing.T) {
 	m.SetQuestion("srv1.coredns.rocks.", dns.TypeA)
 	m.Question[0].Qclass = dns.ClassINET
 	m.Answer = []dns.RR{test.A("srv1.coredns.rocks.  5   IN  A  10.0.0.1")}
-	m.MsgHdr.Rcode = dns.RcodeServerFailure
+	m.Rcode = dns.RcodeServerFailure
 	request := request.Request{Req: m}
 
 	rcRule, _ := rule.(*exactRCodeRule)
 	var rr dns.RR
 	rcRule.response.RewriteResponse(request.Req, rr)
-	if request.Req.MsgHdr.Rcode != dns.RcodeFormatError {
+	if request.Req.Rcode != dns.RcodeFormatError {
 		t.Fatalf("RCode rewrite did not apply changes, request=%#v, err=%v", request.Req, err)
 	}
 }

plugin/rewrite/rewrite.go

@@ -54,7 +54,7 @@ func (rw Rewrite) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg
 			}
 			wr.ResponseRules = append(wr.ResponseRules, respRules...)
 			if rule.Mode() == Stop {
-				if !rw.RevertPolicy.DoRevert() {
+				if !rw.DoRevert() {
 					return plugin.NextOrFailure(rw.Name(), rw.Next, ctx, w, r)
 				}
 				rcode, err := plugin.NextOrFailure(rw.Name(), rw.Next, ctx, wr, r)
@@ -71,7 +71,7 @@ func (rw Rewrite) ServeDNS(ctx context.Context, w dns.ResponseWriter, r *dns.Msg
 			}
 		}
 	}
-	if !rw.RevertPolicy.DoRevert() || len(wr.ResponseRules) == 0 {
+	if !rw.DoRevert() || len(wr.ResponseRules) == 0 {
 		return plugin.NextOrFailure(rw.Name(), rw.Next, ctx, w, r)
 	}
 	return plugin.NextOrFailure(rw.Name(), rw.Next, ctx, wr, r)

plugin/sign/file.go

@@ -29,19 +29,19 @@ func (s *Signer) write(z *file.Zone) error {
 }
 
 func write(w io.Writer, z *file.Zone) error {
-	if _, err := io.WriteString(w, z.Apex.SOA.String()); err != nil {
+	if _, err := io.WriteString(w, z.SOA.String()); err != nil {
 		return err
 	}
 	w.Write([]byte("\n")) // RR Stringer() method doesn't include newline, which ends the RR in a zone file, write that here.
-	for _, rr := range z.Apex.SIGSOA {
+	for _, rr := range z.SIGSOA {
 		io.WriteString(w, rr.String())
 		w.Write([]byte("\n"))
 	}
-	for _, rr := range z.Apex.NS {
+	for _, rr := range z.NS {
 		io.WriteString(w, rr.String())
 		w.Write([]byte("\n"))
 	}
-	for _, rr := range z.Apex.SIGNS {
+	for _, rr := range z.SIGNS {
 		io.WriteString(w, rr.String())
 		w.Write([]byte("\n"))
 	}

plugin/sign/signer.go

@@ -41,10 +41,10 @@ func (s *Signer) Sign(now time.Time) (*file.Zone, error) {
 		return nil, err
 	}
 
-	mttl := z.Apex.SOA.Minttl
-	ttl := z.Apex.SOA.Header().Ttl
+	mttl := z.SOA.Minttl
+	ttl := z.SOA.Header().Ttl
 	inception, expiration := lifetime(now, s.jitterIncep, s.jitterExpir)
-	z.Apex.SOA.Serial = uint32(now.Unix())
+	z.SOA.Serial = uint32(now.Unix())
 
 	for _, pair := range s.keys {
 		pair.Public.Header().Ttl = ttl // set TTL on key so it matches the RRSIG.
@@ -58,14 +58,14 @@ func (s *Signer) Sign(now time.Time) (*file.Zone, error) {
 	ln := len(names)
 
 	for _, pair := range s.keys {
-		rrsig, err := pair.signRRs([]dns.RR{z.Apex.SOA}, s.origin, ttl, inception, expiration)
+		rrsig, err := pair.signRRs([]dns.RR{z.SOA}, s.origin, ttl, inception, expiration)
 		if err != nil {
 			return nil, err
 		}
 		z.Insert(rrsig)
 		// NS apex may not be set if RR's have been discarded because the origin doesn't match.
-		if len(z.Apex.NS) > 0 {
-			rrsig, err = pair.signRRs(z.Apex.NS, s.origin, ttl, inception, expiration)
+		if len(z.NS) > 0 {
+			rrsig, err = pair.signRRs(z.NS, s.origin, ttl, inception, expiration)
 			if err != nil {
 				return nil, err
 			}
@@ -178,7 +178,7 @@ func signAndLog(s *Signer, why error) {
 		log.Warningf("Error signing %q: failed to move zone file into place: %s", s.origin, err)
 		return
 	}
-	log.Infof("Successfully signed zone %q in %q with key tags %q and %d SOA serial, elapsed %f, next: %s", s.origin, filepath.Join(s.directory, s.signedfile), keyTag(s.keys), z.Apex.SOA.Serial, time.Since(now).Seconds(), now.Add(durationRefreshHours).Format(timeFmt))
+	log.Infof("Successfully signed zone %q in %q with key tags %q and %d SOA serial, elapsed %f, next: %s", s.origin, filepath.Join(s.directory, s.signedfile), keyTag(s.keys), z.SOA.Serial, time.Since(now).Seconds(), now.Add(durationRefreshHours).Format(timeFmt))
 }
 
 // refresh checks every val if some zones need to be resigned.

plugin/sign/signer_test.go

@@ -170,7 +170,7 @@ func TestSignDS(t *testing.T) {
 	if x := nsec[0].(*dns.NSEC).NextDomain; x != "www.miek.nl." {
 		t.Errorf("Expected no NSEC NextDomain to be %s for %s, got %s", "www.miek.nl.", name, x)
 	}
-	minttl := z.Apex.SOA.Minttl
+	minttl := z.SOA.Minttl
 	if x := nsec[0].Header().Ttl; x != minttl {
 		t.Errorf("Expected no NSEC TTL to be %d for %s, got %d", minttl, "www.miek.nl.", x)
 	}

plugin/trace/logger.go

@@ -11,10 +11,10 @@ type loggerAdapter struct {
 }
 
 func (l *loggerAdapter) Write(p []byte) (n int, err error) {
-	l.P.Warning(string(p))
+	l.Warning(string(p))
 	return len(p), nil
 }
 
 func (l *loggerAdapter) Log(msg string) {
-	l.P.Warning(msg)
+	l.Warning(msg)
 }

plugin/trace/setup_test.go

@@ -60,7 +60,7 @@ func TestTraceParse(t *testing.T) {
 			continue
 		}
 
-		if "" != m.serviceEndpoint {
+		if m.serviceEndpoint != "" {
 			t.Errorf("Test %v: Expected serviceEndpoint to be '' but found: %s", i, m.serviceEndpoint)
 		}
 		if test.endpoint != m.Endpoint {

plugin/tsig/tsig.go

@@ -117,7 +117,7 @@ func (r *restoreTsigWriter) WriteMsg(m *dns.Msg) error {
 		repTSIG = new(dns.TSIG)
 		repTSIG.Hdr = dns.RR_Header{Name: r.reqTSIG.Hdr.Name, Rrtype: dns.TypeTSIG, Class: dns.ClassANY}
 		repTSIG.Algorithm = r.reqTSIG.Algorithm
-		repTSIG.OrigId = m.MsgHdr.Id
+		repTSIG.OrigId = m.Id
 		repTSIG.Error = r.reqTSIG.Error
 		repTSIG.MAC = r.reqTSIG.MAC
 		repTSIG.MACSize = r.reqTSIG.MACSize

plugin/tsig/tsig_test.go

@@ -179,9 +179,7 @@ func TestServeDNSTsigErrors(t *testing.T) {
 		t.Run(tc.desc, func(t *testing.T) {
 			ctx := context.TODO()
 
-			var w *dnstest.Recorder
-
-			w = dnstest.NewRecorder(&ErrWriter{err: tc.tsigErr})
+			var w = dnstest.NewRecorder(&ErrWriter{err: tc.tsigErr})
 
 			r := new(dns.Msg)
 			r.SetQuestion("test.example.", dns.TypeA)