From 7cff8746711417b57d1d248bcffd8dc0b44a2655 Mon Sep 17 00:00:00 2001
From: xqzr <34030394+xqzr@users.noreply.github.com>
Date: Tue, 1 Apr 2025 03:01:46 +0800
Subject: [PATCH] Add `SO_KEEPALIVE`

---
 transport/internet/sockopt_windows.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/transport/internet/sockopt_windows.go b/transport/internet/sockopt_windows.go
index 57b15c47..c452aeab 100644
--- a/transport/internet/sockopt_windows.go
+++ b/transport/internet/sockopt_windows.go
@@ -74,6 +74,9 @@ func applyOutboundSocketOptions(network string, address string, fd uintptr, conf
 					return errors.New("failed to set TCP_KEEPIDLE", err)
 				}
 			}
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
+				return errors.New("failed to set SO_KEEPALIVE", err)
+			}
 		} else if config.TcpKeepAliveInterval < 0 || config.TcpKeepAliveIdle < 0 {
 			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 0); err != nil {
 				return errors.New("failed to unset SO_KEEPALIVE", err)
@@ -100,6 +103,9 @@ func applyInboundSocketOptions(network string, fd uintptr, config *SocketConfig)
 					return errors.New("failed to set TCP_KEEPIDLE", err)
 				}
 			}
+			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 1); err != nil {
+				return errors.New("failed to set SO_KEEPALIVE", err)
+			}
 		} else if config.TcpKeepAliveInterval < 0 || config.TcpKeepAliveIdle < 0 {
 			if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, 0); err != nil {
 				return errors.New("failed to unset SO_KEEPALIVE", err)