Feature: add vmess WebSocket early data (#1505)

Co-authored-by: ShinyGwyn <79344143+ShinyGwyn@users.noreply.github.com>

adapter/outbound/vmess.go

@@ -43,6 +43,7 @@ type VmessOption struct {
 	HTTPOpts       HTTPOptions       `proxy:"http-opts,omitempty"`
 	HTTP2Opts      HTTP2Options      `proxy:"h2-opts,omitempty"`
 	GrpcOpts       GrpcOptions       `proxy:"grpc-opts,omitempty"`
+	WSOpts         WSOptions         `proxy:"ws-opts,omitempty"`
 	WSPath         string            `proxy:"ws-path,omitempty"`
 	WSHeaders      map[string]string `proxy:"ws-headers,omitempty"`
 	SkipCertVerify bool              `proxy:"skip-cert-verify,omitempty"`
@@ -64,19 +65,35 @@ type GrpcOptions struct {
 	GrpcServiceName string `proxy:"grpc-service-name,omitempty"`
 }
 
+type WSOptions struct {
+	Path                string            `proxy:"path,omitempty"`
+	Headers             map[string]string `proxy:"headers,omitempty"`
+	MaxEarlyData        int               `proxy:"max-early-data,omitempty"`
+	EarlyDataHeaderName string            `proxy:"early-data-header-name,omitempty"`
+}
+
 // StreamConn implements C.ProxyAdapter
 func (v *Vmess) StreamConn(c net.Conn, metadata *C.Metadata) (net.Conn, error) {
 	var err error
 	switch v.option.Network {
 	case "ws":
-		host, port, _ := net.SplitHostPort(v.addr)
-		wsOpts := &vmess.WebsocketConfig{
-			Host: host,
-			Port: port,
-			Path: v.option.WSPath,
+		if v.option.WSOpts.Path == "" {
+			v.option.WSOpts.Path = v.option.WSPath
+		}
+		if len(v.option.WSOpts.Headers) == 0 {
+			v.option.WSOpts.Headers = v.option.WSHeaders
 		}
 
-		if len(v.option.WSHeaders) != 0 {
+		host, port, _ := net.SplitHostPort(v.addr)
+		wsOpts := &vmess.WebsocketConfig{
+			Host:                host,
+			Port:                port,
+			Path:                v.option.WSOpts.Path,
+			MaxEarlyData:        v.option.WSOpts.MaxEarlyData,
+			EarlyDataHeaderName: v.option.WSOpts.EarlyDataHeaderName,
+		}
+
+		if len(v.option.WSOpts.Headers) != 0 {
 			header := http.Header{}
 			for key, value := range v.option.WSHeaders {
 				header.Add(key, value)