From f57754918d4d8010b08c5ff2221703085c3a915c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E4=B8=96=E7=95=8C?= <i@sekai.icu>
Date: Sat, 12 Apr 2025 14:39:22 +0800
Subject: [PATCH] Add DefaultInterfaceMonitor.MyInterface

---
 monitor.go        |  2 ++
 monitor_shared.go | 15 ++++++++++++++-
 tun_darwin.go     |  1 +
 tun_linux.go      |  2 +-
 tun_windows.go    |  1 +
 5 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/monitor.go b/monitor.go
index a3b4ef6..a1866c8 100644
--- a/monitor.go
+++ b/monitor.go
@@ -30,6 +30,8 @@ type DefaultInterfaceMonitor interface {
 	AndroidVPNEnabled() bool
 	RegisterCallback(callback DefaultInterfaceUpdateCallback) *list.Element[DefaultInterfaceUpdateCallback]
 	UnregisterCallback(element *list.Element[DefaultInterfaceUpdateCallback])
+	RegisterMyInterface(interfaceName string)
+	MyInterface() string
 }
 
 type DefaultInterfaceMonitorOptions struct {
diff --git a/monitor_shared.go b/monitor_shared.go
index a5ee4e3..12e3e21 100644
--- a/monitor_shared.go
+++ b/monitor_shared.go
@@ -42,11 +42,12 @@ type defaultInterfaceMonitor struct {
 	androidVPNEnabled     bool
 	noRoute               bool
 	networkMonitor        NetworkUpdateMonitor
+	logger                logger.Logger
 	checkUpdateTimer      *time.Timer
 	element               *list.Element[NetworkUpdateCallback]
 	access                sync.Mutex
 	callbacks             list.List[DefaultInterfaceUpdateCallback]
-	logger                logger.Logger
+	myInterface           string
 }
 
 func NewDefaultInterfaceMonitor(networkMonitor NetworkUpdateMonitor, logger logger.Logger, options DefaultInterfaceMonitorOptions) (DefaultInterfaceMonitor, error) {
@@ -132,3 +133,15 @@ func (m *defaultInterfaceMonitor) emit(defaultInterface *control.Interface, flag
 		callback(defaultInterface, flags)
 	}
 }
+
+func (m *defaultInterfaceMonitor) RegisterMyInterface(interfaceName string) {
+	m.access.Lock()
+	defer m.access.Unlock()
+	m.myInterface = interfaceName
+}
+
+func (m *defaultInterfaceMonitor) MyInterface() string {
+	m.access.Lock()
+	defer m.access.Unlock()
+	return m.myInterface
+}
diff --git a/tun_darwin.go b/tun_darwin.go
index a0dd54a..2462d75 100644
--- a/tun_darwin.go
+++ b/tun_darwin.go
@@ -82,6 +82,7 @@ func New(options Options) (Tun, error) {
 }
 
 func (t *NativeTun) Start() error {
+	t.options.InterfaceMonitor.RegisterMyInterface(t.options.Name)
 	return t.setRoutes()
 }
 
diff --git a/tun_linux.go b/tun_linux.go
index 6a3549d..9c28377 100644
--- a/tun_linux.go
+++ b/tun_linux.go
@@ -264,7 +264,7 @@ func (t *NativeTun) Start() error {
 	if t.options.FileDescriptor != 0 {
 		return nil
 	}
-
+	t.options.InterfaceMonitor.RegisterMyInterface(t.options.Name)
 	tunLink, err := netlink.LinkByName(t.options.Name)
 	if err != nil {
 		return err
diff --git a/tun_windows.go b/tun_windows.go
index 9cb1e96..dde6199 100644
--- a/tun_windows.go
+++ b/tun_windows.go
@@ -163,6 +163,7 @@ func (t *NativeTun) Name() (string, error) {
 }
 
 func (t *NativeTun) Start() error {
+	t.options.InterfaceMonitor.RegisterMyInterface(t.options.Name)
 	if !t.options.AutoRoute {
 		return nil
 	}