assertThat(canonicalizeInetAddress(addressD)).isEqualTo(addressD)

    val addressE = decodeIpv6("2001:db8::1:0:0:1")!!
    assertThat(canonicalizeInetAddress(addressE)).isEqualTo(addressE)

    val addressF = decodeIpv6("0:0:0:0:0:ffff:7f00:1")!!
    assertThat(canonicalizeInetAddress(addressF)).isEqualTo(addressB)

    val addressG = decodeIpv6("0:0:0:0:0:ffff:c0a8:1")!!

 * 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 {
    isMappedIpv4Address(address) -> address.sliceArray(12 until 16)
    else -> address
  }
}