1 /* 2 * Copyright (C) 2014 Square, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.squareup.okhttp.internal; 17 18 import com.squareup.okhttp.Dns; 19 import java.net.InetAddress; 20 import java.net.UnknownHostException; 21 import java.util.Collections; 22 import java.util.List; 23 24 /** 25 * A network that resolves only one IP address per host. Use this when testing 26 * route selection fallbacks to prevent the host machine's various IP addresses 27 * from interfering. 28 */ 29 public class SingleInetAddressDns implements Dns { lookup(String hostname)30 @Override public List<InetAddress> lookup(String hostname) throws UnknownHostException { 31 List<InetAddress> addresses = Dns.SYSTEM.lookup(hostname); 32 return Collections.singletonList(addresses.get(0)); 33 } 34 } 35