--- net/tap-win32.c     2010-07-05 11:14:51 +0200
+++ net/tap-win32.c-orig        2010-07-05 11:33:11 +0200
@@ -479,7 +479,7 @@ static int tap_win32_write(tap_win32_ove
         }
     }
 
-    return 0;
+    return write_size;
 }
 
 static DWORD WINAPI tap_win32_thread_entry(LPVOID param)