public void testIncrementIPv6() throws UnknownHostException {
    InetAddress addressV6_66_0 = InetAddress.getByName("2001:db8::6600");
    InetAddress addressV6_66_ff = InetAddress.getByName("2001:db8::66ff");
    InetAddress addressV6_67_0 = InetAddress.getByName("2001:db8::6700");

    InetAddress address = addressV6_66_0;
    for (int i = 0; i < 255; i++) {
      address = InetAddresses.increment(address);

   *
   * @param address the InetAddress to decrement
   * @return a new InetAddress that is one less than the passed in address
   * @throws IllegalArgumentException if InetAddress is at the beginning of its range
   * @since 18.0
   */
  public static InetAddress decrement(InetAddress address) {
    byte[] addr = address.getAddress();
    int i = addr.length - 1;
    while (i >= 0 && addr[i] == (byte) 0x00) {

    printEvent("callEnd");
  }

  @Override public void dnsStart(Call call, String domainName) {
    printEvent("dnsStart");
  }

  @Override public void dnsEnd(Call call, String domainName, List<InetAddress> inetAddressList) {
    printEvent("dnsEnd");
  }

  ...
}
```

We make a couple calls:

```java
Request request = new Request.Builder()
    .url("https://publicobject.com/helloworld.txt")

     *
     * @return formatted string containing hostname and IP address
     */
    protected String getHostInfo() {
        final StringBuilder buf = new StringBuilder();
        try {
            final InetAddress ia = InetAddress.getLocalHost();
            final String hostname = ia.getHostName();
            if (StringUtil.isNotBlank(hostname)) {
                buf.append(hostname);
            }

    }

    /**
     * Resolves a hostname to an InetAddress.
     *
     * @param host the hostname to resolve
     * @return the resolved InetAddress
     * @throws FessSystemException if hostname resolution fails
     */
    protected InetAddress getInetAddressByName(final String host) {
        try {
            return InetAddress.getByName(host);
        } catch (final UnknownHostException e) {

 * limitations under the License.
 */

package okhttp3

import java.io.File
import java.io.IOException
import java.math.BigInteger
import java.net.CookieHandler
import java.net.InetAddress
import java.net.InetSocketAddress
import java.net.Proxy
import java.net.ProxySelector
import java.net.Socket
import java.net.URI
import java.net.URL
import java.nio.charset.Charset
import java.security.KeyPair

import assertk.assertions.isTrue
import assertk.fail
import java.net.CookieHandler
import java.net.CookieManager
import java.net.CookiePolicy
import java.net.HttpCookie
import java.net.HttpURLConnection
import java.net.InetAddress
import java.net.URI
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.Cookie.Companion.parse
import okhttp3.HttpUrl.Companion.toHttpUrl

import java.io.IOException
import java.io.InterruptedIOException
import java.net.CookieManager
import java.net.CookiePolicy
import java.net.HttpCookie
import java.net.HttpURLConnection
import java.net.InetAddress
import java.net.ProtocolException
import java.net.Proxy
import java.net.SocketTimeoutException
import java.net.UnknownHostException
import java.net.UnknownServiceException
import java.time.Duration

import static org.codelibs.core.stream.StreamUtil.stream;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.InetAddress;
import java.net.URLEncoder;
import java.net.UnknownHostException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;

    reading the public suffix database would cause subsequent reads to hang when they should have
    crashed.

 *  Fix: Avoid `InetAddress.getCanonicalHostName()` in MockWebServer. This avoids problems if the
    host machine's IP address has additional DNS registrations.