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-rw-r--r--tun/tun_windows.go6
1 files changed, 6 insertions, 0 deletions
diff --git a/tun/tun_windows.go b/tun/tun_windows.go
index 05fc3df..1de74e6 100644
--- a/tun/tun_windows.go
+++ b/tun/tun_windows.go
@@ -141,6 +141,12 @@ func (tun *NativeTun) openTUN() error {
}
return err
}
+ firstSize := (*uint32)(unsafe.Pointer(&tun.wrBuff.data[0]))
+ saved := *firstSize
+ *firstSize = 0
+ // Set the maximum buffer length with an invalid write.
+ tun.tunFileWrite.Write(tun.wrBuff.data[:])
+ *firstSize = saved
}
return nil
}