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@@ -3,8 +3,9 @@
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package tun
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package tun
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import (
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import (
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+ "crypto/md5"
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"errors"
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"errors"
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- _ "unsafe"
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+ "unsafe"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows"
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"golang.zx2c4.com/wintun"
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"golang.zx2c4.com/wintun"
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@@ -66,7 +67,9 @@ func NewTun(options TunOptions) (Tun, error) {
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}
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}
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func open(name string) (*wintun.Adapter, error) {
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func open(name string) (*wintun.Adapter, error) {
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- var guid *windows.GUID
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+ // generate a deterministic GUID from the adapter name
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+ id := md5.Sum([]byte(name))
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+ guid := (*windows.GUID)(unsafe.Pointer(&id[0]))
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// try to open existing adapter by name
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// try to open existing adapter by name
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adapter, err := wintun.OpenAdapter(name)
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adapter, err := wintun.OpenAdapter(name)
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if err == nil {
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if err == nil {
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