v1.0.0

transport/internet/websocket/hub.go

@@ -0,0 +1,151 @@
+// +build !confonly
+
+package websocket
+
+import (
+	"context"
+	"crypto/tls"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+
+	"github.com/xtls/xray-core/v1/common"
+	"github.com/xtls/xray-core/v1/common/net"
+	http_proto "github.com/xtls/xray-core/v1/common/protocol/http"
+	"github.com/xtls/xray-core/v1/common/session"
+	"github.com/xtls/xray-core/v1/transport/internet"
+	v2tls "github.com/xtls/xray-core/v1/transport/internet/tls"
+)
+
+type requestHandler struct {
+	path string
+	ln   *Listener
+}
+
+var upgrader = &websocket.Upgrader{
+	ReadBufferSize:   4 * 1024,
+	WriteBufferSize:  4 * 1024,
+	HandshakeTimeout: time.Second * 4,
+	CheckOrigin: func(r *http.Request) bool {
+		return true
+	},
+}
+
+func (h *requestHandler) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
+	if request.URL.Path != h.path {
+		writer.WriteHeader(http.StatusNotFound)
+		return
+	}
+	conn, err := upgrader.Upgrade(writer, request, nil)
+	if err != nil {
+		newError("failed to convert to WebSocket connection").Base(err).WriteToLog()
+		return
+	}
+
+	forwardedAddrs := http_proto.ParseXForwardedFor(request.Header)
+	remoteAddr := conn.RemoteAddr()
+	if len(forwardedAddrs) > 0 && forwardedAddrs[0].Family().IsIP() {
+		remoteAddr = &net.TCPAddr{
+			IP:   forwardedAddrs[0].IP(),
+			Port: int(0),
+		}
+	}
+
+	h.ln.addConn(newConnection(conn, remoteAddr))
+}
+
+type Listener struct {
+	sync.Mutex
+	server   http.Server
+	listener net.Listener
+	config   *Config
+	addConn  internet.ConnHandler
+	locker   *internet.FileLocker // for unix domain socket
+}
+
+func ListenWS(ctx context.Context, address net.Address, port net.Port, streamSettings *internet.MemoryStreamConfig, addConn internet.ConnHandler) (internet.Listener, error) {
+	l := &Listener{
+		addConn: addConn,
+	}
+	wsSettings := streamSettings.ProtocolSettings.(*Config)
+	l.config = wsSettings
+	if l.config != nil {
+		if streamSettings.SocketSettings == nil {
+			streamSettings.SocketSettings = &internet.SocketConfig{}
+		}
+		streamSettings.SocketSettings.AcceptProxyProtocol = l.config.AcceptProxyProtocol
+	}
+	var listener net.Listener
+	var err error
+	if port == net.Port(0) { //unix
+		listener, err = internet.ListenSystem(ctx, &net.UnixAddr{
+			Name: address.Domain(),
+			Net:  "unix",
+		}, streamSettings.SocketSettings)
+		if err != nil {
+			return nil, newError("failed to listen unix domain socket(for WS) on ", address).Base(err)
+		}
+		newError("listening unix domain socket(for WS) on ", address).WriteToLog(session.ExportIDToError(ctx))
+		locker := ctx.Value(address.Domain())
+		if locker != nil {
+			l.locker = locker.(*internet.FileLocker)
+		}
+	} else { //tcp
+		listener, err = internet.ListenSystem(ctx, &net.TCPAddr{
+			IP:   address.IP(),
+			Port: int(port),
+		}, streamSettings.SocketSettings)
+		if err != nil {
+			return nil, newError("failed to listen TCP(for WS) on ", address, ":", port).Base(err)
+		}
+		newError("listening TCP(for WS) on ", address, ":", port).WriteToLog(session.ExportIDToError(ctx))
+	}
+
+	if streamSettings.SocketSettings != nil && streamSettings.SocketSettings.AcceptProxyProtocol {
+		newError("accepting PROXY protocol").AtWarning().WriteToLog(session.ExportIDToError(ctx))
+	}
+
+	if config := v2tls.ConfigFromStreamSettings(streamSettings); config != nil {
+		if tlsConfig := config.GetTLSConfig(); tlsConfig != nil {
+			listener = tls.NewListener(listener, tlsConfig)
+		}
+	}
+
+	l.listener = listener
+
+	l.server = http.Server{
+		Handler: &requestHandler{
+			path: wsSettings.GetNormalizedPath(),
+			ln:   l,
+		},
+		ReadHeaderTimeout: time.Second * 4,
+		MaxHeaderBytes:    2048,
+	}
+
+	go func() {
+		if err := l.server.Serve(l.listener); err != nil {
+			newError("failed to serve http for WebSocket").Base(err).AtWarning().WriteToLog(session.ExportIDToError(ctx))
+		}
+	}()
+
+	return l, err
+}
+
+// Addr implements net.Listener.Addr().
+func (ln *Listener) Addr() net.Addr {
+	return ln.listener.Addr()
+}
+
+// Close implements net.Listener.Close().
+func (ln *Listener) Close() error {
+	if ln.locker != nil {
+		ln.locker.Release()
+	}
+	return ln.listener.Close()
+}
+
+func init() {
+	common.Must(internet.RegisterTransportListener(protocolName, ListenWS))
+}