net/{dnscache,interfaces}: use netaddr.IP.IsPrivate, delete copied code
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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committed by
Brad Fitzpatrick

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@ -93,7 +93,7 @@ func likelyHomeRouterIPWindows() (ret netaddr.IP, ok bool) {
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}
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}
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if !ret.IsZero() && !isPrivateIP(ret) {
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if !ret.IsZero() && !ret.IsPrivate() {
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// Default route has a non-private gateway
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return netaddr.IP{}, false
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}
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