| /* |
| * 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 com.android.server.connectivity; |
| |
| import android.content.Context; |
| import android.net.LinkProperties; |
| import android.net.Network; |
| import android.net.NetworkCapabilities; |
| import android.net.NetworkInfo; |
| import android.net.NetworkMisc; |
| import android.net.NetworkRequest; |
| import android.os.Handler; |
| import android.os.Messenger; |
| import android.util.SparseArray; |
| |
| import com.android.internal.util.AsyncChannel; |
| import com.android.server.connectivity.NetworkMonitor; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * A bag class used by ConnectivityService for holding a collection of most recent |
| * information published by a particular NetworkAgent as well as the |
| * AsyncChannel/messenger for reaching that NetworkAgent and lists of NetworkRequests |
| * interested in using it. |
| */ |
| public class NetworkAgentInfo { |
| public NetworkInfo networkInfo; |
| public Network network; |
| public LinkProperties linkProperties; |
| public NetworkCapabilities networkCapabilities; |
| public final NetworkMonitor networkMonitor; |
| public final NetworkMisc networkMisc; |
| // Indicates if netd has been told to create this Network. Once created the appropriate routing |
| // rules are setup and routes are added so packets can begin flowing over the Network. |
| // NOTE: This is a sticky bit; once set it is never cleared. |
| public boolean created; |
| // Set to true if this Network successfully passed validation or if it did not satisfy the |
| // default NetworkRequest in which case validation will not be attempted. |
| // NOTE: This is a sticky bit; once set it is never cleared even if future validation attempts |
| // fail. |
| public boolean validated; |
| |
| // This represents the last score received from the NetworkAgent. |
| private int currentScore; |
| // Penalty applied to scores of Networks that have not been validated. |
| private static final int UNVALIDATED_SCORE_PENALTY = 40; |
| |
| // Score for explicitly connected network. |
| private static final int EXPLICITLY_SELECTED_NETWORK_SCORE = 100; |
| |
| // The list of NetworkRequests being satisfied by this Network. |
| public final SparseArray<NetworkRequest> networkRequests = new SparseArray<NetworkRequest>(); |
| // The list of NetworkRequests that this Network previously satisfied with the highest |
| // score. A non-empty list indicates that if this Network was validated it is lingered. |
| // NOTE: This list is only used for debugging. |
| public final ArrayList<NetworkRequest> networkLingered = new ArrayList<NetworkRequest>(); |
| |
| public final Messenger messenger; |
| public final AsyncChannel asyncChannel; |
| |
| // Used by ConnectivityService to keep track of 464xlat. |
| public Nat464Xlat clatd; |
| |
| public NetworkAgentInfo(Messenger messenger, AsyncChannel ac, NetworkInfo info, |
| LinkProperties lp, NetworkCapabilities nc, int score, Context context, Handler handler, |
| NetworkMisc misc, NetworkRequest defaultRequest) { |
| this.messenger = messenger; |
| asyncChannel = ac; |
| network = null; |
| networkInfo = info; |
| linkProperties = lp; |
| networkCapabilities = nc; |
| currentScore = score; |
| networkMonitor = new NetworkMonitor(context, handler, this, defaultRequest); |
| networkMisc = misc; |
| created = false; |
| validated = false; |
| } |
| |
| public void addRequest(NetworkRequest networkRequest) { |
| networkRequests.put(networkRequest.requestId, networkRequest); |
| } |
| |
| public boolean isVPN() { |
| return networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN); |
| } |
| |
| // Get the current score for this Network. This may be modified from what the |
| // NetworkAgent sent, as it has modifiers applied to it. |
| public int getCurrentScore() { |
| // TODO: We may want to refactor this into a NetworkScore class that takes a base score from |
| // the NetworkAgent and signals from the NetworkAgent and uses those signals to modify the |
| // score. The NetworkScore class would provide a nice place to centralize score constants |
| // so they are not scattered about the transports. |
| |
| int score = currentScore; |
| |
| if (!validated) score -= UNVALIDATED_SCORE_PENALTY; |
| if (score < 0) score = 0; |
| |
| if (networkMisc.explicitlySelected) score = EXPLICITLY_SELECTED_NETWORK_SCORE; |
| |
| return score; |
| } |
| |
| public void setCurrentScore(int newScore) { |
| currentScore = newScore; |
| } |
| |
| public String toString() { |
| return "NetworkAgentInfo{ ni{" + networkInfo + "} network{" + |
| network + "} lp{" + |
| linkProperties + "} nc{" + |
| networkCapabilities + "} Score{" + getCurrentScore() + "} " + |
| "validated{" + validated + "} created{" + created + "} " + |
| "explicitlySelected{" + networkMisc.explicitlySelected + "} }"; |
| } |
| |
| public String name() { |
| return "NetworkAgentInfo [" + networkInfo.getTypeName() + " (" + |
| networkInfo.getSubtypeName() + ") - " + |
| (network == null ? "null" : network.toString()) + "]"; |
| } |
| } |