)

  /**
   * Callback to receive results from the DNS Queries.
   */
  @ExperimentalOkHttpApi
  interface Callback {
    /**
     * Return addresses for a dns query for a single class of IPv4 (A) or IPv6 (AAAA).
     * May be an empty list indicating that the host is unreachable.
     */
    fun onResponse(
      hostname: String,
      addresses: List<InetAddress>,
    )

    /**

  }
  return result.readUtf8()
}

/**
 * Returns the canonical address for [address]. If [address] is an IPv6 address that is mapped to an
 * IPv4 address, this returns the IPv4-mapped address. Otherwise, this returns [address].
 *
 * https://en.wikipedia.org/wiki/IPv6#IPv4-mapped_IPv6_addresses
 */
internal fun canonicalizeInetAddress(address: ByteArray): ByteArray {
  return when {

      ),
    ).isEqualTo("255.255.255.255")
  }

  private fun decodeIpv6(input: String): ByteArray? = decodeIpv6(input, 0, input.length)

  @Test
  fun testToCanonicalHost() {
    // IPv4
    assertThat("127.0.0.1".toCanonicalHost()).isEqualTo("127.0.0.1")
    assertThat("1.2.3.4".toCanonicalHost()).isEqualTo("1.2.3.4")

    // IPv6
    assertThat("::1".toCanonicalHost()).isEqualTo("::1")

				// Number of probes.
				// ~ cat /proc/sys/net/ipv4/tcp_keepalive_probes (defaults to 9, we reduce it to 5)
				_ = syscall.SetsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_KEEPCNT, 5)

				// Wait time after successful probe in seconds.
				// ~ cat /proc/sys/net/ipv4/tcp_keepalive_intvl (defaults to 75 secs, we reduce it to 15 secs)

          initCause(e)
        },
      )
    }
  }

  @ExperimentalOkHttpApi
  companion object {
    @RequiresApi(Build.VERSION_CODES.Q)
    val IPv4 = AndroidAsyncDns(dnsClass = AsyncDns.DnsClass.IPV4)

    @RequiresApi(Build.VERSION_CODES.Q)
    val IPv6 = AndroidAsyncDns(dnsClass = AsyncDns.DnsClass.IPV6)
  }

@Config(shadows = [ShadowDnsResolver::class], sdk = [34])
@RunWith(RobolectricTestRunner::class)
class AndroidAsyncDnsTest {
  @Test
  fun testDnsRequestInvalid() {
    val asyncDns = AndroidAsyncDns.IPv4
    val shadowDns: ShadowDnsResolver = Shadow.extract(asyncDns.resolver)

    shadowDns.responder = {
      throw IllegalArgumentException("Network.fromNetworkHandle refusing to instantiate NETID_UNSET Network.")
    }

DEFAULT_KIND_IMAGE="gcr.io/istio-testing/kind-node:v1.28.4"

# the default kind cluster should be ipv4 if not otherwise specified
IP_FAMILY="${IP_FAMILY:-ipv4}"

# COMMON_SCRIPTS contains the directory this file is in.
COMMON_SCRIPTS=$(dirname "${BASH_SOURCE:-$0}")

function log() {
  echo -e "$(date -u '+%Y-%m-%dT%H:%M:%S.%NZ')\t$*"
}

  // All addresses in this slice must be the same type. This field is
  // immutable after creation. The following address types are currently
  // supported:
  // * IPv4: Represents an IPv4 Address.
  // * IPv6: Represents an IPv6 Address.
  // * FQDN: Represents a Fully Qualified Domain Name.
  optional string addressType = 4;

    assertThat(recordedRequest.requestUrl!!.host).isEqualTo("2607:f8b0:400b:804::200e")
    assertThat(recordedRequest.handshakeServerNames).isEmpty()
  }

  /** No SNI for literal IPv4 addresses. */
  @Test
  fun ipv4() {
    val recordedRequest = requestToHostnameViaProxy("76.223.91.57")
    assertThat(recordedRequest.requestUrl!!.host).isEqualTo("76.223.91.57")
    assertThat(recordedRequest.handshakeServerNames).isEmpty()

	if err != nil {
		t.Fatal(err)
	}

	compareToGolden(t, false, tt.name, ext.ExecutedAll)
}

func ipstr(ipv6 bool) string {
	if ipv6 {
		return "ipv6"
	}
	return "ipv4"
}

func compareToGolden(t *testing.T, ipv6 bool, name string, actual []string) {
	t.Helper()
	gotBytes := []byte(strings.Join(actual, "\n"))
	goldenFile := filepath.Join("testdata", name+".golden")
	if ipv6 {