fix: config marshaller

config/config.go

@@ -88,7 +88,7 @@ type DnsRouting struct {
 }
 type KeyableString string
 type Dns struct {
-	IpVersionPrefer int             `mapstructure:"ipversion_prefer"`
+	IpVersionPrefer uint8           `mapstructure:"ipversion_prefer"`
 	FixedDomainTtl  []KeyableString `mapstructure:"fixed_domain_ttl"`
 	Upstream        []KeyableString `mapstructure:"upstream"`
 	Routing         DnsRouting      `mapstructure:"routing"`

config/marshal.go

@@ -180,7 +180,7 @@ func (m *Marshaller) marshalLeaf(key string, from reflect.Value, depth int) (err
 		case fmt.Stringer, string,
 			uint8, uint16, uint32, uint64,
 			int8, int16, int32, int64,
-			float32, float64,
+			float32, float64, int,
 			bool:
 			m.writeLine(depth, key+":"+strconv.Quote(fmt.Sprintf("%v", val)))
 		case *config_parser.Function:

control/dns_control.go

@@ -38,7 +38,7 @@ const (
 	minFirefoxCacheTtl = 120
 )
 
-type IpVersionPrefer int
+type IpVersionPrefer uint8
 
 const (
 	IpVersionPrefer_No IpVersionPrefer = 0
@@ -61,7 +61,7 @@ type DnsControllerOption struct {
 	CacheRemoveCallback func(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
+	IpVersionPrefer     uint8
 	FixedDomainTtl      map[string]int
 }
 
@@ -83,7 +83,7 @@ type DnsController struct {
 	dnsCache   map[string]*DnsCache
 }
 
-func parseIpVersionPreference(prefer int) (uint16, error) {
+func parseIpVersionPreference(prefer uint8) (uint16, error) {
 	switch prefer := IpVersionPrefer(prefer); prefer {
 	case IpVersionPrefer_No:
 		return 0, nil