| /* |
| * Copyright (C) 2011 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 com.android.server.net; |
| |
| import static android.net.ConnectivityManager.TYPE_WIFI; |
| import static android.net.ConnectivityManager.TYPE_WIMAX; |
| import static android.net.ConnectivityManager.isNetworkTypeMobile; |
| import static android.net.TrafficStats.TEMPLATE_MOBILE_3G_LOWER; |
| import static android.net.TrafficStats.TEMPLATE_MOBILE_4G; |
| import static android.net.TrafficStats.TEMPLATE_MOBILE_ALL; |
| import static android.net.TrafficStats.TEMPLATE_WIFI; |
| import static android.telephony.TelephonyManager.NETWORK_CLASS_2_G; |
| import static android.telephony.TelephonyManager.NETWORK_CLASS_3_G; |
| import static android.telephony.TelephonyManager.NETWORK_CLASS_4_G; |
| import static android.telephony.TelephonyManager.getNetworkClass; |
| |
| import android.content.Context; |
| import android.net.ConnectivityManager; |
| import android.net.NetworkInfo; |
| import android.net.NetworkState; |
| import android.telephony.TelephonyManager; |
| |
| import com.android.internal.util.Objects; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.net.ProtocolException; |
| |
| /** |
| * Identity of a {@link NetworkInfo}, defined by network type and billing |
| * relationship (such as IMSI). |
| * |
| * @hide |
| */ |
| public class NetworkIdentity { |
| private static final int VERSION_CURRENT = 1; |
| |
| public final int type; |
| public final int subType; |
| public final String subscriberId; |
| |
| public NetworkIdentity(int type, int subType, String subscriberId) { |
| this.type = type; |
| this.subType = subType; |
| this.subscriberId = subscriberId; |
| } |
| |
| public NetworkIdentity(DataInputStream in) throws IOException { |
| final int version = in.readInt(); |
| switch (version) { |
| case VERSION_CURRENT: { |
| type = in.readInt(); |
| subType = in.readInt(); |
| subscriberId = readOptionalString(in); |
| break; |
| } |
| default: { |
| throw new ProtocolException("unexpected version: " + version); |
| } |
| } |
| } |
| |
| public void writeToStream(DataOutputStream out) throws IOException { |
| out.writeInt(VERSION_CURRENT); |
| out.writeInt(type); |
| out.writeInt(subType); |
| writeOptionalString(out, subscriberId); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hashCode(type, subType, subscriberId); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj instanceof NetworkIdentity) { |
| final NetworkIdentity ident = (NetworkIdentity) obj; |
| return type == ident.type && subType == ident.subType |
| && Objects.equal(subscriberId, ident.subscriberId); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| final String typeName = ConnectivityManager.getNetworkTypeName(type); |
| final String subTypeName; |
| if (ConnectivityManager.isNetworkTypeMobile(type)) { |
| subTypeName = TelephonyManager.getNetworkTypeName(subType); |
| } else { |
| subTypeName = Integer.toString(subType); |
| } |
| |
| return "[type=" + typeName + ", subType=" + subTypeName + ", subId=" + subscriberId + "]"; |
| } |
| |
| /** |
| * Test if this network matches the given template and IMEI. |
| */ |
| public boolean matchesTemplate(int networkTemplate, String subscriberId) { |
| switch (networkTemplate) { |
| case TEMPLATE_MOBILE_ALL: |
| return matchesMobile(subscriberId); |
| case TEMPLATE_MOBILE_3G_LOWER: |
| return matchesMobile3gLower(subscriberId); |
| case TEMPLATE_MOBILE_4G: |
| return matchesMobile4g(subscriberId); |
| case TEMPLATE_WIFI: |
| return matchesWifi(); |
| default: |
| throw new IllegalArgumentException("unknown network template"); |
| } |
| } |
| |
| /** |
| * Check if mobile network with matching IMEI. Also matches |
| * {@link #TYPE_WIMAX}. |
| */ |
| private boolean matchesMobile(String subscriberId) { |
| if (isNetworkTypeMobile(type) && Objects.equal(this.subscriberId, subscriberId)) { |
| return true; |
| } else if (type == TYPE_WIMAX) { |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Check if mobile network classified 3G or lower with matching IMEI. |
| */ |
| private boolean matchesMobile3gLower(String subscriberId) { |
| if (isNetworkTypeMobile(type) |
| && Objects.equal(this.subscriberId, subscriberId)) { |
| switch (getNetworkClass(subType)) { |
| case NETWORK_CLASS_2_G: |
| case NETWORK_CLASS_3_G: |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Check if mobile network classified 4G with matching IMEI. Also matches |
| * {@link #TYPE_WIMAX}. |
| */ |
| private boolean matchesMobile4g(String subscriberId) { |
| if (isNetworkTypeMobile(type) |
| && Objects.equal(this.subscriberId, subscriberId)) { |
| switch (getNetworkClass(subType)) { |
| case NETWORK_CLASS_4_G: |
| return true; |
| } |
| } else if (type == TYPE_WIMAX) { |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Check if matches Wi-Fi network template. |
| */ |
| private boolean matchesWifi() { |
| if (type == TYPE_WIFI) { |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Build a {@link NetworkIdentity} from the given {@link NetworkState}, |
| * assuming that any mobile networks are using the current IMSI. |
| */ |
| public static NetworkIdentity buildNetworkIdentity(Context context, NetworkState state) { |
| final int type = state.networkInfo.getType(); |
| final int subType = state.networkInfo.getSubtype(); |
| |
| // TODO: consider moving subscriberId over to LinkCapabilities, so it |
| // comes from an authoritative source. |
| |
| final String subscriberId; |
| if (isNetworkTypeMobile(type)) { |
| final TelephonyManager telephony = (TelephonyManager) context.getSystemService( |
| Context.TELEPHONY_SERVICE); |
| subscriberId = telephony.getSubscriberId(); |
| } else { |
| subscriberId = null; |
| } |
| return new NetworkIdentity(type, subType, subscriberId); |
| } |
| |
| private static void writeOptionalString(DataOutputStream out, String value) throws IOException { |
| if (value != null) { |
| out.writeByte(1); |
| out.writeUTF(value); |
| } else { |
| out.writeByte(0); |
| } |
| } |
| |
| private static String readOptionalString(DataInputStream in) throws IOException { |
| if (in.readByte() != 0) { |
| return in.readUTF(); |
| } else { |
| return null; |
| } |
| } |
| |
| } |