package server

import (
	"net"
	"testing"

	netutils "k8s.io/utils/net"
)

func TestLoopbackHostPortIPv4(t *testing.T) {
	_, ipv6only, err := isIPv6LoopbackSupported()
	if err != nil {
		t.Fatalf("fail to enumerate network interface, %s", err)
	}
	if ipv6only {
		t.Fatalf("no ipv4 loopback interface")
	}

	host, port, err := LoopbackHostPort("1.2.3.4:443")
	if err != nil {

	"os"
	"syscall"
)

func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
		// Allow both IP versions even if the OS default
		// is otherwise. Note that some operating systems
		// never admit this option.
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
	}

)

func setDefaultSockopts(s syscall.Handle, family, sotype int, ipv6only bool) error {
	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
		// Allow both IP versions even if the OS default
		// is otherwise. Note that some operating systems
		// never admit this option.
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
	}

	{ipv4only, nil, testInetaddr, nil, nil, nil, &AddrError{errNoSuitableAddress.Error(), "ADDR"}},
	{ipv4only, []IPAddr{{IP: IPv6loopback}}, testInetaddr, nil, nil, nil, &AddrError{errNoSuitableAddress.Error(), "ADDR"}},

	{ipv6only, nil, testInetaddr, nil, nil, nil, &AddrError{errNoSuitableAddress.Error(), "ADDR"}},

	"os"
	"syscall"
)

func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
		// Allow both IP versions even if the OS default
		// is otherwise. Note that some operating systems
		// never admit this option.
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
	}

	"os"
	"syscall"
)

func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
	if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
		// Allow both IP versions even if the OS default
		// is otherwise. Note that some operating systems
		// never admit this option.
		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
	}

	}
	return addrs, nil
}

// ipv4only reports whether addr is an IPv4 address.
func ipv4only(addr IPAddr) bool {
	return addr.IP.To4() != nil
}

// ipv6only reports whether addr is an IPv6 address except IPv4-mapped IPv6 address.
func ipv6only(addr IPAddr) bool {
	return len(addr.IP) == IPv6len && addr.IP.To4() == nil
}

//go:build darwin || dragonfly || freebsd || netbsd || openbsd

package net

import (
	"os"
	"runtime"
	"syscall"
)

func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
	if runtime.GOOS == "dragonfly" && sotype != syscall.SOCK_RAW {
		// On DragonFly BSD, we adjust the ephemeral port
		// range because unlike other BSD systems its default

	case "aix", "windows", "openbsd", "js", "wasip1":
		if mode == "dial" && raddr.isWildcard() {
			raddr = raddr.toLocal(net)
		}
	}
	family, ipv6only := favoriteAddrFamily(net, laddr, raddr, mode)
	return socket(ctx, net, family, sotype, proto, ipv6only, laddr, raddr, ctrlCtxFn)
}

func ipToSockaddrInet4(ip IP, port int) (syscall.SockaddrInet4, error) {
	if len(ip) == 0 {
		ip = IPv4zero
	}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build js || wasip1

package net

import "syscall"

func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
	return nil
}

func setDefaultListenerSockopts(s int) error {
	return nil
}

func setDefaultMulticastSockopts(s int) error {
	return nil
}