From 31cf571a6aac3dcfe77cc35c328af967b799d44a Mon Sep 17 00:00:00 2001
From: ginuerzh <ginuerzh@gmail.com>
Date: Wed, 3 Jun 2026 23:33:27 +0800
Subject: [PATCH] refactor(handler/router): extract conn.go (packetConn,
 lockWriter) from associate.go

---
 handler/router/associate.go | 66 --------------------------------
 handler/router/conn.go      | 75 +++++++++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 66 deletions(-)
 create mode 100644 handler/router/conn.go

diff --git a/handler/router/associate.go b/handler/router/associate.go
index 864645e6..9bfff18c 100644
--- a/handler/router/associate.go
+++ b/handler/router/associate.go
@@ -3,13 +3,9 @@ package router
 import (
 	"bytes"
 	"context"
-	"encoding/binary"
-	"errors"
 	"fmt"
 	"io"
-	"math"
 	"net"
-	"sync"
 	"time"
 
 	"github.com/go-gost/core/common/bufpool"
@@ -294,65 +290,3 @@ func (h *routerHandler) getAddrforRoute(ctx context.Context, routerID, gateway s
 	return raddr
 }
 
-type packetConn struct {
-	net.Conn
-}
-
-func (c *packetConn) Read(b []byte) (n int, err error) {
-	var bb [2]byte
-	_, err = io.ReadFull(c.Conn, bb[:])
-	if err != nil {
-		return
-	}
-
-	dlen := int(binary.BigEndian.Uint16(bb[:]))
-	if len(b) >= dlen {
-		return io.ReadFull(c.Conn, b[:dlen])
-	}
-
-	buf := bufpool.Get(dlen)
-	defer bufpool.Put(buf)
-
-	n, err = io.ReadFull(c.Conn, buf)
-	copy(b, buf[:n])
-
-	return
-}
-
-func (c *packetConn) Write(b []byte) (n int, err error) {
-	if len(b) > math.MaxUint16 {
-		err = errors.New("write: data maximum exceeded")
-		return
-	}
-
-	buf := bufpool.Get(len(b) + 2)
-	defer bufpool.Put(buf)
-
-	binary.BigEndian.PutUint16(buf[:2], uint16(len(b)))
-	n = copy(buf[2:], b)
-
-	return c.Conn.Write(buf)
-}
-
-type lockWriter struct {
-	w  io.Writer
-	mu sync.Mutex
-}
-
-func LockWriter(w io.Writer) io.Writer {
-	return &lockWriter{w: w}
-}
-
-func (w *lockWriter) Write(p []byte) (int, error) {
-	w.mu.Lock()
-	defer w.mu.Unlock()
-
-	return w.w.Write(p)
-}
-
-func (w *lockWriter) Close() error {
-	if closer, ok := w.w.(io.Closer); ok {
-		return closer.Close()
-	}
-	return nil
-}
diff --git a/handler/router/conn.go b/handler/router/conn.go
new file mode 100644
index 00000000..214d954b
--- /dev/null
+++ b/handler/router/conn.go
@@ -0,0 +1,75 @@
+package router
+
+import (
+	"encoding/binary"
+	"errors"
+	"io"
+	"math"
+	"net"
+	"sync"
+
+	"github.com/go-gost/core/common/bufpool"
+)
+
+type packetConn struct {
+	net.Conn
+}
+
+func (c *packetConn) Read(b []byte) (n int, err error) {
+	var bb [2]byte
+	_, err = io.ReadFull(c.Conn, bb[:])
+	if err != nil {
+		return
+	}
+
+	dlen := int(binary.BigEndian.Uint16(bb[:]))
+	if len(b) >= dlen {
+		return io.ReadFull(c.Conn, b[:dlen])
+	}
+
+	buf := bufpool.Get(dlen)
+	defer bufpool.Put(buf)
+
+	n, err = io.ReadFull(c.Conn, buf)
+	copy(b, buf[:n])
+
+	return
+}
+
+func (c *packetConn) Write(b []byte) (n int, err error) {
+	if len(b) > math.MaxUint16 {
+		err = errors.New("write: data maximum exceeded")
+		return
+	}
+
+	buf := bufpool.Get(len(b) + 2)
+	defer bufpool.Put(buf)
+
+	binary.BigEndian.PutUint16(buf[:2], uint16(len(b)))
+	n = copy(buf[2:], b)
+
+	return c.Conn.Write(buf)
+}
+
+type lockWriter struct {
+	w  io.Writer
+	mu sync.Mutex
+}
+
+func LockWriter(w io.Writer) io.Writer {
+	return &lockWriter{w: w}
+}
+
+func (w *lockWriter) Write(p []byte) (int, error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+
+	return w.w.Write(p)
+}
+
+func (w *lockWriter) Close() error {
+	if closer, ok := w.w.(io.Closer); ok {
+		return closer.Close()
+	}
+	return nil
+}