feat: REALITY use proxy servername

adapter/outbound/reality.go

@@ -11,14 +11,12 @@ import (
 )
 
 type RealityOptions struct {
-	ServerName string `proxy:"server-name"`
 	PublicKey string `proxy:"public-key"`
 	ShortID   string `proxy:"short-id"`
 }
 
 func (o RealityOptions) Parse() (*tlsC.RealityConfig, error) {
-	if o.PublicKey != "" || o.ServerName != "" {
-		if o.PublicKey != "" && o.ServerName != "" {
+	if o.PublicKey != "" {
 		config := new(tlsC.RealityConfig)
 
 		n, err := base64.RawURLEncoding.Decode(config.PublicKey[:], []byte(o.PublicKey))
@@ -31,11 +29,7 @@ func (o RealityOptions) Parse() (*tlsC.RealityConfig, error) {
 			return nil, errors.New("invalid REALITY short ID")
 		}
 
-			config.ServerName = o.ServerName
-
 		return config, nil
 	}
-		return nil, errors.New("invalid REALITY protocol option")
-	}
 	return nil, nil
 }

component/tls/reality.go

@@ -30,7 +30,6 @@ import (
 )
 
 type RealityConfig struct {
-	ServerName string
 	PublicKey [curve25519.ScalarSize]byte
 	ShortID   []byte
 }
@@ -38,13 +37,14 @@ type RealityConfig struct {
 func GetRealityConn(ctx context.Context, conn net.Conn, ClientFingerprint string, tlsConfig *tls.Config, realityConfig *RealityConfig) (net.Conn, error) {
 	if fingerprint, exists := GetFingerprint(ClientFingerprint); exists {
 		verifier := &realityVerifier{
-			serverName: realityConfig.ServerName,
+			serverName: tlsConfig.ServerName,
+		}
+		uConfig := &utls.Config{
+			ServerName:             tlsConfig.ServerName,
+			InsecureSkipVerify:     true,
+			SessionTicketsDisabled: true,
+			VerifyPeerCertificate:  verifier.VerifyPeerCertificate,
 		}
-		uConfig := copyConfig(tlsConfig)
-		uConfig.ServerName = realityConfig.ServerName
-		uConfig.InsecureSkipVerify = true
-		uConfig.SessionTicketsDisabled = true
-		uConfig.VerifyPeerCertificate = verifier.VerifyPeerCertificate
 		clientID := utls.ClientHelloID{
 			Client:  fingerprint.Client,
 			Version: fingerprint.Version,

docs/config.yaml

@@ -451,13 +451,11 @@ proxies: # socks5
     udp: true
     xudp: true
     flow: xtls-rprx-vision
+    servername: www.microsoft.com # REALITY servername
     reality-opts:
-      server-name: www.microsoft.com
       public-key: xxx
-      short-id: xxx
-    client-fingerprint: chrome
-    # fingerprint: xxxx
-    # skip-cert-verify: true
+      short-id: xxx # optional
+    client-fingerprint: chrome # cannot be empty
     
   - name: "vless-ws"
     type: vless