addressFunc     func(nw string) string
				targetPortFunc  func(nw string) int
				networkNameFunc func(nw string) string
			}{
				{
					name:            "with gateway address",
					addressFunc:     func(nw string) string { return gatewayAddresses[nw].ip },
					targetPortFunc:  func(nw string) int { return gatewayAddresses[nw].port },
					networkNameFunc: func(nw string) string { return "" },
				},
				{

		o.qty = uint32(chunkSize)
		o.o.Offset = uint32(curpos)
		o.o.OffsetHigh = uint32(curpos >> 32)

		nw, err := execIO(o, func(o *operation) error {
			return syscall.TransmitFile(o.fd.Sysfd, o.handle, o.qty, 0, &o.o, nil, syscall.TF_WRITE_BEHIND)
		})
		if err != nil {
			return written, err
		}

		curpos += int64(nw)

		// Some versions of Windows (Windows 10 1803) do not set
		// file position after TransmitFile completes.

const (
	north direction = iota
	ne
	east
	se
	south
	sw
	west
	nw
	up
	down
)

func (dir direction) String() string {
	strs := map[direction]string{
		north: "north",
		ne:    "ne",
		east:  "east",
		se:    "se",
		south: "south",
		sw:    "sw",
		west:  "west",
		nw:    "nw",
		up:    "up",
		down:  "down",
	}
	if str, ok := strs[dir]; ok {
		return str

	sz := len(ws.BytesWritten())
	zeros := []byte{0, 0, 0, 0}
	rem := uint32(sz) % 4
	if rem != 0 {
		pad := zeros[:(4 - rem)]
		if nw, err := ws.Write(pad); err != nil {
			return err
		} else if nw != len(pad) {
			return fmt.Errorf("error: short write")
		}
	}
	return nil
}

func (cfw *CoverageDataWriter) patchSegmentHeader(ws *slicewriter.WriteSeeker) error {

func (npa *NodePortAddresses) GetNodeIPs(nw NetworkInterfacer) ([]net.IP, error) {
	addrs, err := nw.InterfaceAddrs()
	if err != nil {
		return nil, fmt.Errorf("error listing all interfaceAddrs from host, error: %v", err)
	}

	// Use a map to dedup matches
	addresses := make(map[string]net.IP)
	for _, cidr := range npa.cidrs {
		for _, addr := range addrs {
			var ip net.IP

	}

	p.wrMu.Lock() // Ensure entirety of b is written together
	defer p.wrMu.Unlock()
	for once := true; once || len(b) > 0; once = false {
		select {
		case p.wrTx <- b:
			nw := <-p.wrRx
			b = b[nw:]
			n += nw
		case <-p.localDone:
			return n, io.ErrClosedPipe
		case <-p.remoteDone:
			return n, io.ErrClosedPipe
		case <-p.writeDeadline.wait():
			return n, os.ErrDeadlineExceeded
		}
	}

	}
	return off + (int64(len(b.funcs)) * 4)
}

func (b *CoverageMetaDataBuilder) emitFunc(w io.WriteSeeker, off int64, f funcDesc) (int64, error) {
	ew := len(f.encoded)
	if nw, err := w.Write(f.encoded); err != nil {
		return 0, err
	} else if ew != nw {
		return 0, fmt.Errorf("short write emitting coverage meta-data")
	}
	return off + int64(ew), nil
}

func (b *CoverageMetaDataBuilder) reportWriteError(err error) {

func (b *EndpointBuilder) selectNetworkGateways(nw network.ID, c cluster.ID) []model.NetworkGateway {
	// Get the gateways for this network+cluster combination.
	gws := b.gateways().GatewaysForNetworkAndCluster(nw, c)
	if len(gws) == 0 {
		// No match for network+cluster, just match the network.
		gws = b.gateways().GatewaysForNetwork(nw)
	}
	return gws
}

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00000050  3b c5 42 ad aa 73 a8 e0  ac 26 d2 e7 ef c7 a9 72  |;.B..s...&.....r|

00000300  66 19 52 0b 0a 2e ea 0d  69 bf 93 a0 29 0f 6a 30  |f.R.....i...).j0|
00000310  2c 1b 44 25 13 e3 b7 03  db b3 fc 37 9c 3f bb e7  |,.D%.......7.?..|
00000320  c7 4d 65 8f af bb 39 fa  6e 77 09 bb 08 09 7e d1  |.Me...9.nw....~.|
00000330  0f ad 57 78 a6 cb a8 3f  2e 70 fc 38 75 2f a0 23  |..Wx...?.p.8u/.#|
00000340  0b 0c 6c 28 0a 71 51 dc  10 8f 85 fd 97 0f c4 84  |..l(.qQ.........|