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ipv4: fix unsafe pointer conversion in parseInterface

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Fixes golang/go#35174

Change-Id: I01ae0ec25c90da0d05b1b262b33a32233f88260f
Reviewed-on: https://go-review.googlesource.com/c/net/+/203400
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Cuong Manh Le
2019-10-26 23:09:49 +07:00
committed by Brad Fitzpatrick
parent 83d349e8ac
commit d64ee3fa51
1 changed files with 2 additions and 1 deletions
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3
ipv4/control_bsd.go
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@@ -35,6 +35,7 @@ func marshalInterface(b []byte, cm *ControlMessage) []byte {
}
func parseInterface(cm *ControlMessage, b []byte) {
sadl := (*syscall.SockaddrDatalink)(unsafe.Pointer(&b[0]))
var sadl syscall.SockaddrDatalink
copy((*[unsafe.Sizeof(&sadl)]byte)(unsafe.Pointer(&sadl))[:], b)
cm.IfIndex = int(sadl.Index)
}