func TCPAddrFromAddrPort(addr netip.AddrPort) *TCPAddr {
	return &TCPAddr{
		IP:   addr.Addr().AsSlice(),
		Zone: addr.Addr().Zone(),
		Port: int(addr.Port()),
	}
}

// TCPConn is an implementation of the [Conn] interface for TCP network
// connections.
type TCPConn struct {
	conn
}

// KeepAliveConfig contains TCP keep-alive options.
//

	// Find IP addr of excluded interfaces and add to a map for instant lookup
	for _, ifaceName := range exclusions {
		iface, err := net.InterfaceByName(ifaceName)
		if err != nil {
			log.Warnf("Unable to get interface %s: %v", ifaceName, err)
			continue
		}
		addrs, err := iface.Addrs()
		if err != nil {
			log.Warnf("Unable to get IP addr(s) of interface %s: %v", ifaceName, err)
			continue

	}
	releaseSudog(s)
}

func semrelease(addr *uint32) {
	semrelease1(addr, false, 0)
}

func semrelease1(addr *uint32, handoff bool, skipframes int) {
	root := semtable.rootFor(addr)
	atomic.Xadd(addr, 1)

	// Easy case: no waiters?
	// This check must happen after the xadd, to avoid a missed wakeup
	// (see loop in semacquire).
	if root.nwait.Load() == 0 {
		return
	}

			addr := IPAddr{IP: ip, Zone: zone}
			addrs = append(addrs, addr)
		}
	}
	sortByRFC6724(addrs)
	return addrs, canonical
}

// goLookupIP is the native Go implementation of LookupIP.
// The libc versions are in cgo_*.go.
func (r *Resolver) goLookupIP(ctx context.Context, network, host string, order hostLookupOrder, conf *dnsConfig) (addrs []IPAddr, err error) {

		}
		defer syscall.FreeAddrInfoW(result)
		addrs := make([]IPAddr, 0, 5)
		for ; result != nil; result = result.Next {
			addr := unsafe.Pointer(result.Addr)
			switch result.Family {
			case syscall.AF_INET:
				a := (*syscall.RawSockaddrInet4)(addr).Addr
				addrs = append(addrs, IPAddr{IP: copyIP(a[:])})
			case syscall.AF_INET6:
				a := (*syscall.RawSockaddrInet6)(addr).Addr

	if !ok || i != len(mask) || n < 0 || n > ipAddr.BitLen() {
		return nil, nil, &ParseError{Type: "CIDR address", Text: s}
	}
	m := CIDRMask(n, ipAddr.BitLen())
	addr16 := ipAddr.As16()
	return IP(addr16[:]), &IPNet{IP: IP(addr16[:]).Mask(m), Mask: m}, nil
}

func copyIP(x IP) IP {
	y := make(IP, len(x))
	copy(y, x)
	return y

				t.Fatalf("Test %d: error: expected = <nil>, got = %v", i+1, err)
			}
		}

		addrs := listener.Addrs()
		addrSet := set.NewStringSet()
		for _, addr := range addrs {
			addrSet.Add(addr.String())
		}

		if !addrSet.Equals(testCase.expectedAddrs) {
			t.Fatalf("Test %d: addr: expected = %v, got = %v", i+1, testCase.expectedAddrs, addrs)
		}

		listener.Close()
	}

		}
	}

	for i, tt := range tests {
		d := &Dialer{LocalAddr: tt.laddr}
		var addr string
		ip := ParseIP(tt.raddr)
		if ip.To4() != nil {
			addr = lss[0].Listener.Addr().String()
		}
		if ip.To16() != nil && ip.To4() == nil {
			addr = lss[1].Listener.Addr().String()
		}
		c, err := d.Dial(tt.network, addr)
		if err == nil && tt.error != nil || err != nil && tt.error == nil {

			continue
		}
		have := make([]string, 0)
		addrs, err := ifi.Addrs()
		if err != nil {
			t.Fatal(err)
		}
		for _, addr := range addrs {
			switch addr := addr.(type) {
			case *IPNet:
				if addr.IP.To4() != nil {
					have = append(have, addr.String())
				}
				if addr.IP.To16() != nil && addr.IP.To4() == nil {
					// netsh does not output netmask for ipv6, so ignore ipv6 mask

		}
		switch addr := addr.(type) {
		case *TCPAddr:
			if !wildcard && !addr.isWildcard() && !addr.IP.matchAddrFamily(tcp.IP) {
				continue
			}
			naddrs = append(naddrs, addr)
		case *UDPAddr:
			if !wildcard && !addr.isWildcard() && !addr.IP.matchAddrFamily(udp.IP) {
				continue
			}
			naddrs = append(naddrs, addr)
		case *IPAddr: