Freedom noises: Change legacy variable name (#4238)

Closes https://github.com/XTLS/Xray-core/issues/4237

infra/conf/freedom.go

@@ -167,11 +167,11 @@ func ParseNoise(noise *Noise) (*freedom.Noise, error) {
 
 	case "str":
 		//user input string
-		NConfig.StrNoise = []byte(strings.TrimSpace(noise.Packet))
+		NConfig.Packet = []byte(strings.TrimSpace(noise.Packet))
 
 	case "base64":
 		//user input base64
-		NConfig.StrNoise, err = base64.StdEncoding.DecodeString(strings.TrimSpace(noise.Packet))
+		NConfig.Packet, err = base64.StdEncoding.DecodeString(strings.TrimSpace(noise.Packet))
 		if err != nil {
 			return nil, errors.New("Invalid base64 string")
 		}

proxy/freedom/config.pb.go

@@ -233,7 +233,7 @@ type Noise struct {
 	LengthMax uint64 `protobuf:"varint,2,opt,name=length_max,json=lengthMax,proto3" json:"length_max,omitempty"`
 	DelayMin  uint64 `protobuf:"varint,3,opt,name=delay_min,json=delayMin,proto3" json:"delay_min,omitempty"`
 	DelayMax  uint64 `protobuf:"varint,4,opt,name=delay_max,json=delayMax,proto3" json:"delay_max,omitempty"`
-	StrNoise  []byte `protobuf:"bytes,5,opt,name=str_noise,json=strNoise,proto3" json:"str_noise,omitempty"`
+	Packet    []byte `protobuf:"bytes,5,opt,name=packet,proto3" json:"packet,omitempty"`
 }
 
 func (x *Noise) Reset() {
@@ -294,9 +294,9 @@ func (x *Noise) GetDelayMax() uint64 {
 	return 0
 }
 
-func (x *Noise) GetStrNoise() []byte {
+func (x *Noise) GetPacket() []byte {
 	if x != nil {
-		return x.StrNoise
+		return x.Packet
 	}
 	return nil
 }
@@ -412,7 +412,7 @@ var file_proxy_freedom_config_proto_rawDesc = []byte{
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@@ -420,49 +420,49 @@ var file_proxy_freedom_config_proto_rawDesc = []byte{
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 }
 
 var (

proxy/freedom/config.proto

@@ -25,7 +25,7 @@ message Noise {
   uint64 length_max = 2;
   uint64 delay_min = 3;
   uint64 delay_max = 4;
-  bytes str_noise = 5;
+  bytes packet = 5;
 }
 
 message Config {

proxy/freedom/freedom.go

@@ -407,8 +407,8 @@ func (w *NoisePacketWriter) WriteMultiBuffer(mb buf.MultiBuffer) error {
 		var err error
 		for _, n := range w.noises {
 			//User input string or base64 encoded string
-			if n.StrNoise != nil {
-				noise = n.StrNoise
+			if n.Packet != nil {
+				noise = n.Packet
 			} else {
 				//Random noise
 				noise, err = GenerateRandomBytes(randBetween(int64(n.LengthMin),