remove duplicated address type def

app/proxyman/mux/frame.go

@@ -4,6 +4,7 @@ import (
 	"v2ray.com/core/common/bitmask"
 	"v2ray.com/core/common/buf"
 	"v2ray.com/core/common/net"
+	"v2ray.com/core/common/protocol"
 	"v2ray.com/core/common/serial"
 )
 
@@ -27,14 +28,6 @@ const (
 	TargetNetworkUDP TargetNetwork = 0x02
 )
 
-type AddressType byte
-
-const (
-	AddressTypeIPv4   AddressType = 0x01
-	AddressTypeDomain AddressType = 0x02
-	AddressTypeIPv6   AddressType = 0x03
-)
-
 /*
 Frame format
 2 bytes - length
@@ -79,16 +72,16 @@ func (f FrameMetadata) AsSupplier() buf.Supplier {
 			addr := f.Target.Address
 			switch addr.Family() {
 			case net.AddressFamilyIPv4:
-				b = append(b, byte(AddressTypeIPv4))
+				b = append(b, byte(protocol.AddressTypeIPv4))
 				b = append(b, addr.IP()...)
 				length += 5
 			case net.AddressFamilyIPv6:
-				b = append(b, byte(AddressTypeIPv6))
+				b = append(b, byte(protocol.AddressTypeIPv6))
 				b = append(b, addr.IP()...)
 				length += 17
 			case net.AddressFamilyDomain:
 				nDomain := len(addr.Domain())
-				b = append(b, byte(AddressTypeDomain), byte(nDomain))
+				b = append(b, byte(protocol.AddressTypeDomain), byte(nDomain))
 				b = append(b, addr.Domain()...)
 				length += nDomain + 2
 			}
@@ -115,18 +108,18 @@ func ReadFrameFrom(b []byte) (*FrameMetadata, error) {
 	if f.SessionStatus == SessionStatusNew {
 		network := TargetNetwork(b[0])
 		port := net.PortFromBytes(b[1:3])
-		addrType := AddressType(b[3])
+		addrType := protocol.AddressType(b[3])
 		b = b[4:]
 
 		var addr net.Address
 		switch addrType {
-		case AddressTypeIPv4:
+		case protocol.AddressTypeIPv4:
 			addr = net.IPAddress(b[0:4])
 			b = b[4:]
-		case AddressTypeIPv6:
+		case protocol.AddressTypeIPv6:
 			addr = net.IPAddress(b[0:16])
 			b = b[16:]
-		case AddressTypeDomain:
+		case protocol.AddressTypeDomain:
 			nDomain := int(b[0])
 			addr = net.DomainAddress(string(b[1 : 1+nDomain]))
 			b = b[nDomain+1:]