add interface xnet.SrcAddr/DstAddr

internal/net/proxyproto/conn.go

@@ -2,6 +2,7 @@ package proxyproto
 
 import (
 	"net"
+	"strconv"
 
 	xio "github.com/go-gost/x/internal/io"
 	proxyproto "github.com/pires/go-proxyproto"
@@ -11,6 +12,28 @@ type serverConn struct {
 	net.Conn
 }
 
+func (c *serverConn) RemoteAddr() net.Addr {
+	if conn, ok := c.Conn.(*proxyproto.Conn); ok {
+		return conn.Raw().RemoteAddr()
+	}
+	return c.Conn.RemoteAddr()
+}
+
+func (c *serverConn) LocalAddr() net.Addr {
+	if conn, ok := c.Conn.(*proxyproto.Conn); ok {
+		return conn.Raw().LocalAddr()
+	}
+	return c.Conn.LocalAddr()
+}
+
+func (c *serverConn) SrcAddr() net.Addr {
+	return c.Conn.RemoteAddr()
+}
+
+func (c *serverConn) DstAddr() net.Addr {
+	return c.Conn.LocalAddr()
+}
+
 func (c *serverConn) CloseRead() error {
 	if sc, ok := c.Conn.(xio.CloseRead); ok {
 		return sc.CloseRead()
@@ -36,7 +59,14 @@ func (c *serverConn) CloseWrite() error {
 }
 
 func WrapClientConn(ppv int, src, dst net.Addr, c net.Conn) net.Conn {
-	if ppv <= 0 {
+	if ppv <= 0 || c == nil {
+		return c
+	}
+
+	if src = convertAddr(src); src == nil {
+		return c
+	}
+	if dst = convertAddr(dst); dst == nil {
 		return c
 	}
 
@@ -44,3 +74,31 @@ func WrapClientConn(ppv int, src, dst net.Addr, c net.Conn) net.Conn {
 	header.WriteTo(c)
 	return c
 }
+
+func convertAddr(addr net.Addr) net.Addr {
+	if addr == nil {
+		return nil
+	}
+
+	host, sp, _ := net.SplitHostPort(addr.String())
+	ip := net.ParseIP(host)
+	port, _ := strconv.Atoi(sp)
+
+	if ip == nil || ip.Equal(net.IPv6zero) {
+		ip = net.IPv4zero
+	}
+
+	switch addr.Network() {
+	case "tcp", "tcp4", "tcp6":
+		return &net.TCPAddr{
+			IP:   ip,
+			Port: port,
+		}
+
+	default:
+		return &net.UDPAddr{
+			IP:   ip,
+			Port: port,
+		}
+	}
+}