From 5bf177b0216c9098b1ec3a22ed9e8de4927aca56 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Fri, 7 Apr 2023 21:10:16 +0800
Subject: [PATCH] platform: Fix build on windows

---
 experimental/libbox/service.go         | 2 +-
 experimental/libbox/service_other.go   | 9 +++++++++
 experimental/libbox/service_windows.go | 7 +++++++
 3 files changed, 17 insertions(+), 1 deletion(-)
 create mode 100644 experimental/libbox/service_other.go
 create mode 100644 experimental/libbox/service_windows.go

diff --git a/experimental/libbox/service.go b/experimental/libbox/service.go
index 33c459ac..5a66852c 100644
--- a/experimental/libbox/service.go
+++ b/experimental/libbox/service.go
@@ -79,7 +79,7 @@ func (w *platformInterfaceWrapper) OpenTun(options tun.Options, platformOptions
 	if err != nil {
 		return nil, err
 	}
-	dupFd, err := syscall.Dup(int(tunFd))
+	dupFd, err := dup(int(tunFd))
 	if err != nil {
 		return nil, E.Cause(err, "dup tun file descriptor")
 	}
diff --git a/experimental/libbox/service_other.go b/experimental/libbox/service_other.go
new file mode 100644
index 00000000..9ea68335
--- /dev/null
+++ b/experimental/libbox/service_other.go
@@ -0,0 +1,9 @@
+//go:build !windows
+
+package libbox
+
+import "syscall"
+
+func dup(fd int) (nfd int, err error) {
+	return syscall.Dup(fd)
+}
diff --git a/experimental/libbox/service_windows.go b/experimental/libbox/service_windows.go
new file mode 100644
index 00000000..2dc3b645
--- /dev/null
+++ b/experimental/libbox/service_windows.go
@@ -0,0 +1,7 @@
+package libbox
+
+import "os"
+
+func dup(fd int) (nfd int, err error) {
+	return 0, os.ErrInvalid
+}