conn,wintun: use unsafe.Slice instead of unsafeSlice
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
parent
642a56e165
commit
982d5d2e84
@ -121,10 +121,8 @@ func (*WinRingBind) ParseEndpoint(s string) (Endpoint, error) {
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if (addrinfo.Family != windows.AF_INET && addrinfo.Family != windows.AF_INET6) || addrinfo.Addrlen > unsafe.Sizeof(WinRingEndpoint{}) {
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if (addrinfo.Family != windows.AF_INET && addrinfo.Family != windows.AF_INET6) || addrinfo.Addrlen > unsafe.Sizeof(WinRingEndpoint{}) {
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return nil, windows.ERROR_INVALID_ADDRESS
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return nil, windows.ERROR_INVALID_ADDRESS
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}
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}
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var src []byte
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var dst [unsafe.Sizeof(WinRingEndpoint{})]byte
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var dst [unsafe.Sizeof(WinRingEndpoint{})]byte
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unsafeSlice(unsafe.Pointer(&src), unsafe.Pointer(addrinfo.Addr), int(addrinfo.Addrlen))
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copy(dst[:], unsafe.Slice((*byte)(unsafe.Pointer(addrinfo.Addr)), addrinfo.Addrlen))
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copy(dst[:], src)
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return (*WinRingEndpoint)(unsafe.Pointer(&dst[0])), nil
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return (*WinRingEndpoint)(unsafe.Pointer(&dst[0])), nil
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}
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}
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@ -581,21 +579,3 @@ func bindSocketToInterface6(handle windows.Handle, interfaceIndex uint32) error
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const IPV6_UNICAST_IF = 31
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const IPV6_UNICAST_IF = 31
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return windows.SetsockoptInt(handle, windows.IPPROTO_IPV6, IPV6_UNICAST_IF, int(interfaceIndex))
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return windows.SetsockoptInt(handle, windows.IPPROTO_IPV6, IPV6_UNICAST_IF, int(interfaceIndex))
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}
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}
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// unsafeSlice updates the slice slicePtr to be a slice
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// referencing the provided data with its length & capacity set to
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// lenCap.
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//
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// TODO: when Go 1.16 or Go 1.17 is the minimum supported version,
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// update callers to use unsafe.Slice instead of this.
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func unsafeSlice(slicePtr, data unsafe.Pointer, lenCap int) {
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type sliceHeader struct {
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Data unsafe.Pointer
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Len int
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Cap int
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}
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h := (*sliceHeader)(slicePtr)
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h.Data = data
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h.Len = lenCap
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h.Cap = lenCap
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}
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@ -67,7 +67,7 @@ func (session Session) ReceivePacket() (packet []byte, err error) {
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err = e1
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err = e1
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return
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return
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}
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}
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unsafeSlice(unsafe.Pointer(&packet), unsafe.Pointer(r0), int(packetSize))
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packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
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return
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return
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}
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}
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@ -81,28 +81,10 @@ func (session Session) AllocateSendPacket(packetSize int) (packet []byte, err er
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err = e1
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err = e1
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return
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return
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}
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}
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unsafeSlice(unsafe.Pointer(&packet), unsafe.Pointer(r0), int(packetSize))
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packet = unsafe.Slice((*byte)(unsafe.Pointer(r0)), packetSize)
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return
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return
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}
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}
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func (session Session) SendPacket(packet []byte) {
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func (session Session) SendPacket(packet []byte) {
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syscall.Syscall(procWintunSendPacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
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syscall.Syscall(procWintunSendPacket.Addr(), 2, session.handle, uintptr(unsafe.Pointer(&packet[0])), 0)
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}
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}
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// unsafeSlice updates the slice slicePtr to be a slice
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// referencing the provided data with its length & capacity set to
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// lenCap.
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//
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// TODO: when Go 1.16 or Go 1.17 is the minimum supported version,
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// update callers to use unsafe.Slice instead of this.
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func unsafeSlice(slicePtr, data unsafe.Pointer, lenCap int) {
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type sliceHeader struct {
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Data unsafe.Pointer
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Len int
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Cap int
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}
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h := (*sliceHeader)(slicePtr)
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h.Data = data
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h.Len = lenCap
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h.Cap = lenCap
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}
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