From 0a139067b8da62805d7e534b85a6652713f7587d Mon Sep 17 00:00:00 2001
From: yusing <yusing.wys@gmail.com>
Date: Sun, 15 Feb 2026 17:22:53 +0800
Subject: [PATCH] fix(acl): add logging for unexpected remote address types in
 TCP and UDP listeners

---
 internal/acl/tcp_listener.go | 3 +++
 internal/acl/udp_listener.go | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/internal/acl/tcp_listener.go b/internal/acl/tcp_listener.go
index 0597211c..d64461a1 100644
--- a/internal/acl/tcp_listener.go
+++ b/internal/acl/tcp_listener.go
@@ -5,6 +5,8 @@ import (
 	"io"
 	"net"
 	"time"
+
+	"github.com/rs/zerolog/log"
 )
 
 type TCPListener struct {
@@ -44,6 +46,7 @@ func (s *TCPListener) Accept() (net.Conn, error) {
 	}
 	addr, ok := c.RemoteAddr().(*net.TCPAddr)
 	if !ok {
+		log.Error().Msgf("unexpected remote address type: %T, addr: %s", c.RemoteAddr(), c.RemoteAddr().String())
 		// Not a TCPAddr, drop
 		c.Close()
 		return noConn{}, nil
diff --git a/internal/acl/udp_listener.go b/internal/acl/udp_listener.go
index 7818bd41..a635318d 100644
--- a/internal/acl/udp_listener.go
+++ b/internal/acl/udp_listener.go
@@ -4,6 +4,8 @@ import (
 	"errors"
 	"net"
 	"time"
+
+	"github.com/rs/zerolog/log"
 )
 
 type UDPListener struct {
@@ -33,6 +35,7 @@ func (s *UDPListener) ReadFrom(p []byte) (int, net.Addr, error) {
 		}
 		udpAddr, ok := addr.(*net.UDPAddr)
 		if !ok {
+			log.Error().Msgf("unexpected remote address type: %T, addr: %s", addr, addr.String())
 			// Not a UDPAddr, drop
 			continue
 		}