fix xnet.Pipe

internal/net/proxyproto/conn.go

@@ -3,9 +3,38 @@ package proxyproto
 import (
 	"net"
 
+	xio "github.com/go-gost/x/internal/io"
 	proxyproto "github.com/pires/go-proxyproto"
 )
 
+type serverConn struct {
+	net.Conn
+}
+
+func (c *serverConn) CloseRead() error {
+	if sc, ok := c.Conn.(xio.CloseRead); ok {
+		return sc.CloseRead()
+	}
+	if conn, ok := c.Conn.(*proxyproto.Conn); ok {
+		if tcpConn, ok := conn.TCPConn(); ok {
+			return tcpConn.CloseRead()
+		}
+	}
+	return xio.ErrUnsupported
+}
+
+func (c *serverConn) CloseWrite() error {
+	if sc, ok := c.Conn.(xio.CloseWrite); ok {
+		return sc.CloseWrite()
+	}
+	if conn, ok := c.Conn.(*proxyproto.Conn); ok {
+		if tcpConn, ok := conn.TCPConn(); ok {
+			return tcpConn.CloseWrite()
+		}
+	}
+	return xio.ErrUnsupported
+}
+
 func WrapClientConn(ppv int, src, dst net.Addr, c net.Conn) net.Conn {
 	if ppv <= 0 {
 		return c