dnsforward: imp code

internal/dnsforward/http.go

@@ -70,7 +70,7 @@ type jsonDNSConfig struct {
 	DisableIPv6 *bool `json:"disable_ipv6"`
 
 	// UpstreamMode defines the way DNS requests are constructed.
-	UpstreamMode *UpstreamMode `json:"upstream_mode"`
+	UpstreamMode *jsonUpstreamMode `json:"upstream_mode"`
 
 	// BlockedResponseTTL is the TTL for blocked responses.
 	BlockedResponseTTL *uint32 `json:"blocked_response_ttl"`
@@ -114,20 +114,20 @@ type jsonDNSConfig struct {
 	DefaultLocalPTRUpstreams []string `json:"default_local_ptr_upstreams,omitempty"`
 }
 
-// UpstreamMode is a enumeration of upstream modes.
-type UpstreamMode string
+// jsonUpstreamMode is a enumeration of upstream modes.
+type jsonUpstreamMode string
 
 const (
-	// UpstreamModeEmpty is the default value on frontend, it is used as
-	// UpstreamModeLoadBalance mode.
+	// jsonUpstreamModeEmpty is the default value on frontend, it is used as
+	// jsonUpstreamModeLoadBalance mode.
 	//
 	// Deprecated
-	// TODO(d.kolyshev): Use UpstreamModeLoadBalance instead.
-	UpstreamModeEmpty UpstreamMode = ""
+	// TODO(d.kolyshev): Use jsonUpstreamModeLoadBalance instead.
+	jsonUpstreamModeEmpty jsonUpstreamMode = ""
 
-	UpstreamModeLoadBalance UpstreamMode = "load_balance"
-	UpstreamModeParallel    UpstreamMode = "parallel"
-	UpstreamModeFastestAddr UpstreamMode = "fastest_addr"
+	jsonUpstreamModeLoadBalance jsonUpstreamMode = "load_balance"
+	jsonUpstreamModeParallel    jsonUpstreamMode = "parallel"
+	jsonUpstreamModeFastestAddr jsonUpstreamMode = "fastest_addr"
 )
 
 func (s *Server) getDNSConfig() (c *jsonDNSConfig) {
@@ -161,16 +161,16 @@ func (s *Server) getDNSConfig() (c *jsonDNSConfig) {
 	usePrivateRDNS := s.conf.UsePrivateRDNS
 	localPTRUpstreams := stringutil.CloneSliceOrEmpty(s.conf.LocalPTRResolvers)
 
-	var upstreamMode UpstreamMode
+	var upstreamMode jsonUpstreamMode
 	switch s.conf.UpstreamMode {
 	case UpstreamModeTypeLoadBalance:
-		// TODO(d.kolyshev): Support UpstreamModeLoadBalance on frontend instead
-		// of UpstreamModeEmpty.
-		upstreamMode = UpstreamModeEmpty
+		// TODO(d.kolyshev): Support jsonUpstreamModeLoadBalance on frontend instead
+		// of jsonUpstreamModeEmpty.
+		upstreamMode = jsonUpstreamModeEmpty
 	case UpstreamModeTypeParallel:
-		upstreamMode = UpstreamModeParallel
+		upstreamMode = jsonUpstreamModeParallel
 	case UpstreamModeTypeFastestAddr:
-		upstreamMode = UpstreamModeFastestAddr
+		upstreamMode = jsonUpstreamModeFastestAddr
 	}
 
 	defPTRUps, err := s.defaultLocalPTRUpstreams()
@@ -251,10 +251,10 @@ func (req *jsonDNSConfig) checkUpstreamMode() (err error) {
 
 	switch um := *req.UpstreamMode; um {
 	case
-		UpstreamModeEmpty,
-		UpstreamModeLoadBalance,
-		UpstreamModeParallel,
-		UpstreamModeFastestAddr:
+		jsonUpstreamModeEmpty,
+		jsonUpstreamModeLoadBalance,
+		jsonUpstreamModeParallel,
+		jsonUpstreamModeFastestAddr:
 		return nil
 	default:
 		return fmt.Errorf("upstream_mode: incorrect value %q", um)
@@ -488,13 +488,13 @@ func (s *Server) setConfig(dc *jsonDNSConfig) (shouldRestart bool) {
 
 // mustParseUpstreamMode returns an upstream mode parsed from string.  Panics in
 // case of invalid value.
-func mustParseUpstreamMode(mode UpstreamMode) (um UpstreamModeType) {
+func mustParseUpstreamMode(mode jsonUpstreamMode) (um UpstreamModeType) {
 	switch mode {
-	case UpstreamModeEmpty, UpstreamModeLoadBalance:
+	case jsonUpstreamModeEmpty, jsonUpstreamModeLoadBalance:
 		return UpstreamModeTypeLoadBalance
-	case UpstreamModeParallel:
+	case jsonUpstreamModeParallel:
 		return UpstreamModeTypeParallel
-	case UpstreamModeFastestAddr:
+	case jsonUpstreamModeFastestAddr:
 		return UpstreamModeTypeFastestAddr
 	default:
 		// Should never happen, since the value should be validated.