| /* |
| * Copyright (C) 2014 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.net; |
| |
| import android.content.Context; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.util.Log; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * A data tracker responsible for bringing up and tearing down the system proxy server. |
| * |
| * {@hide} |
| */ |
| public class ProxyDataTracker extends BaseNetworkStateTracker { |
| private static final String NETWORK_TYPE = "PROXY"; |
| private static final String TAG = "ProxyDataTracker"; |
| |
| // TODO: investigate how to get these DNS addresses from the system. |
| private static final String DNS1 = "8.8.8.8"; |
| private static final String DNS2 = "8.8.4.4"; |
| private static final String REASON_ENABLED = "enabled"; |
| |
| private final AtomicInteger mDefaultGatewayAddr = new AtomicInteger(0); |
| private final AtomicInteger mReconnectGeneration = new AtomicInteger(0); |
| |
| /** |
| * Create a new ProxyDataTracker |
| */ |
| public ProxyDataTracker() { |
| mNetworkInfo = new NetworkInfo(ConnectivityManager.TYPE_PROXY, 0, NETWORK_TYPE, ""); |
| // TODO: update available state according to proxy state. |
| mNetworkInfo.setIsAvailable(true); |
| mLinkProperties = new LinkProperties(); |
| mLinkCapabilities = new LinkCapabilities(); |
| |
| try { |
| mLinkProperties.addDns(InetAddress.getByName(DNS1)); |
| mLinkProperties.addDns(InetAddress.getByName(DNS2)); |
| } catch (UnknownHostException e) { |
| Log.e(TAG, "Could not add DNS address", e); |
| } |
| } |
| |
| public Object Clone() throws CloneNotSupportedException { |
| throw new CloneNotSupportedException(); |
| } |
| |
| /** |
| * Disable connectivity to the network. |
| */ |
| public boolean teardown() { |
| // TODO: tell relevant service to tear down proxy. |
| return true; |
| } |
| |
| /** |
| * Re-enable proxy data connectivity after a {@link #teardown()}. |
| */ |
| public boolean reconnect() { |
| if (!isAvailable()) { |
| Log.w(TAG, "Reconnect requested even though network is disabled. Bailing."); |
| return false; |
| } |
| setTeardownRequested(false); |
| mReconnectGeneration.incrementAndGet(); |
| // TODO: tell relevant service to setup proxy. Set state to connected only if setup |
| // succeeds. |
| setDetailedState(NetworkInfo.DetailedState.CONNECTED, REASON_ENABLED, null); |
| |
| return true; |
| } |
| |
| /** |
| * Fetch default gateway address for the network |
| */ |
| public int getDefaultGatewayAddr() { |
| return mDefaultGatewayAddr.get(); |
| } |
| |
| /** |
| * Return the system properties name associated with the tcp buffer sizes |
| * for this network. |
| */ |
| public String getTcpBufferSizesPropName() { |
| return "net.tcp.buffersize.wifi"; |
| } |
| |
| /** |
| * Record the detailed state of a network, and if it is a |
| * change from the previous state, send a notification to |
| * any listeners. |
| * @param state the new @{code DetailedState} |
| * @param reason a {@code String} indicating a reason for the state change, |
| * if one was supplied. May be {@code null}. |
| * @param extraInfo optional {@code String} providing extra information about the state change |
| */ |
| private void setDetailedState(NetworkInfo.DetailedState state, String reason, |
| String extraInfo) { |
| mNetworkInfo.setDetailedState(state, reason, extraInfo); |
| Message msg = getTargetHandler().obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo); |
| msg.sendToTarget(); |
| } |
| } |