Trick for being extra sensitive to route changes

conn_linux.go

@@ -58,11 +58,12 @@ func (endpoint *NativeEndpoint) dst6() *unix.SockaddrInet6 {
 }
 
 type NativeBind struct {
-	sock4         int
-	sock6         int
-	netlinkSock   int
-	netlinkCancel *rwcancel.RWCancel
-	lastMark      uint32
+	sock4                        int
+	sock6                        int
+	netlinkSock                  int
+	netlinkCancel                *rwcancel.RWCancel
+	lastMark                     uint32
+	clearSourceOnAllRouteChanges bool
 }
 
 var _ Endpoint = (*NativeEndpoint)(nil)
@@ -582,6 +583,16 @@ func (bind *NativeBind) routineRouteListener(device *Device) {
 
 			switch hdr.Type {
 			case unix.RTM_NEWROUTE, unix.RTM_DELROUTE:
+				if bind.clearSourceOnAllRouteChanges {
+					for _, peer := range device.peers.keyMap {
+						peer.mutex.Lock()
+						if peer.endpoint != nil && peer.endpoint.(*NativeEndpoint) != nil {
+							peer.endpoint.(*NativeEndpoint).ClearSrc()
+						}
+						peer.mutex.Unlock()
+					}
+					break
+				}
 				if hdr.Seq <= MaxPeers && hdr.Seq > 0 {
 					if uint(len(remain)) < uint(hdr.Len) {
 						break