1 /* 2 * Copyright (C) 2021 The Android Open Source Project 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 17 package libcore.net.http; 18 19 import static android.annotation.SystemApi.Client.MODULE_LIBRARIES; 20 21 import android.annotation.SystemApi; 22 23 import java.net.InetAddress; 24 import java.net.UnknownHostException; 25 import java.util.List; 26 import libcore.util.NonNull; 27 import libcore.util.Nullable; 28 29 /** 30 * A domain name service that resolves IP addresses for host names. 31 * @hide 32 */ 33 @SystemApi(client = MODULE_LIBRARIES) 34 public interface Dns extends com.android.okhttp.internalandroidapi.Dns { 35 /** 36 * Returns the IP addresses of {@code hostname}, in the order they should 37 * be attempted. Returns loopback addresses for {@code null} host. 38 * 39 * @param hostname The host name will be looked up. 40 * 41 * @hide 42 */ 43 @SystemApi(client = MODULE_LIBRARIES) lookup(@ullable String hostname)44 @NonNull List<@NonNull InetAddress> lookup(@Nullable String hostname) throws UnknownHostException; 45 }