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net: handle more interface types without a hardware address on Plan 9
We were handling loopback devices when attempting to read hardware address, but packet interfaces were not being handled. As a general fix, don't attempt to read hardware address of any device that's not inside /net. Fixes #39908 Change-Id: Ifa05e270357e111c60906110db2cc23dc7c1c49c Reviewed-on: https://go-review.googlesource.com/c/go/+/240259 Run-TryBot: David du Colombier <0intro@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David du Colombier <0intro@gmail.com>
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@ -68,8 +68,8 @@ func readInterface(i int) (*Interface, error) {
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}
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ifc.MTU = mtu
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// Not a loopback device
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if device != "/dev/null" {
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// Not a loopback device ("/dev/null") or packet interface (e.g. "pkt2")
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if stringsHasPrefix(device, netdir+"/") {
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deviceaddrf, err := open(device + "/addr")
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if err != nil {
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return nil, err
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