| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.app.admin; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| /** |
| * A class that represents a DNS lookup event initiated through the standard network stack. |
| * |
| * <p>It contains information about the originating app as well as the DNS hostname and resolved |
| * IP addresses. |
| */ |
| public final class DnsEvent extends NetworkEvent implements Parcelable { |
| |
| /** The hostname that was looked up. */ |
| private final String mHostname; |
| |
| /** Contains (possibly a subset of) the IP addresses returned. */ |
| private final String[] mIpAddresses; |
| |
| /** |
| * The number of IP addresses returned from the DNS lookup event. May be different from the |
| * length of ipAddresses if there were too many addresses to log. |
| */ |
| private final int mIpAddressesCount; |
| |
| /** @hide */ |
| public DnsEvent(String hostname, String[] ipAddresses, int ipAddressesCount, |
| String packageName, long timestamp) { |
| super(packageName, timestamp); |
| this.mHostname = hostname; |
| this.mIpAddresses = ipAddresses; |
| this.mIpAddressesCount = ipAddressesCount; |
| } |
| |
| private DnsEvent(Parcel in) { |
| this.mHostname = in.readString(); |
| this.mIpAddresses = in.createStringArray(); |
| this.mIpAddressesCount = in.readInt(); |
| this.mPackageName = in.readString(); |
| this.mTimestamp = in.readLong(); |
| this.mId = in.readLong(); |
| } |
| |
| /** Returns the hostname that was looked up. */ |
| public String getHostname() { |
| return mHostname; |
| } |
| |
| /** Returns (possibly a subset of) the IP addresses returned. */ |
| public List<InetAddress> getInetAddresses() { |
| if (mIpAddresses == null || mIpAddresses.length == 0) { |
| return Collections.emptyList(); |
| } |
| final List<InetAddress> inetAddresses = new ArrayList<>(mIpAddresses.length); |
| for (final String ipAddress : mIpAddresses) { |
| try { |
| // ipAddress is already an address, not a host name, no DNS resolution will happen. |
| inetAddresses.add(InetAddress.getByName(ipAddress)); |
| } catch (UnknownHostException e) { |
| // Should never happen as we aren't passing a host name. |
| } |
| } |
| return inetAddresses; |
| } |
| |
| /** |
| * Returns the number of IP addresses returned from the DNS lookup event. May be different from |
| * the length of the list returned by {@link #getInetAddresses()} if there were too many |
| * addresses to log. |
| */ |
| public int getTotalResolvedAddressCount() { |
| return mIpAddressesCount; |
| } |
| |
| @Override |
| public String toString() { |
| return String.format("DnsEvent(%d, %s, %s, %d, %d, %s)", mId, mHostname, |
| (mIpAddresses == null) ? "NONE" : String.join(" ", mIpAddresses), |
| mIpAddressesCount, mTimestamp, mPackageName); |
| } |
| |
| public static final @android.annotation.NonNull Parcelable.Creator<DnsEvent> CREATOR |
| = new Parcelable.Creator<DnsEvent>() { |
| @Override |
| public DnsEvent createFromParcel(Parcel in) { |
| if (in.readInt() != PARCEL_TOKEN_DNS_EVENT) { |
| return null; |
| } |
| return new DnsEvent(in); |
| } |
| |
| @Override |
| public DnsEvent[] newArray(int size) { |
| return new DnsEvent[size]; |
| } |
| }; |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel out, int flags) { |
| // write parcel token first |
| out.writeInt(PARCEL_TOKEN_DNS_EVENT); |
| out.writeString(mHostname); |
| out.writeStringArray(mIpAddresses); |
| out.writeInt(mIpAddressesCount); |
| out.writeString(mPackageName); |
| out.writeLong(mTimestamp); |
| out.writeLong(mId); |
| } |
| } |