/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wifi;
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import android.net.wifi.SupplicantState;
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import android.net.wifi.WifiEnterpriseConfig;
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import android.net.wifi.WifiManager;
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import android.net.wifi.WifiSsid;
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import android.os.Handler;
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import android.os.Message;
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import android.util.ArraySet;
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import android.util.Log;
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import android.util.SparseArray;
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import com.android.internal.annotations.VisibleForTesting;
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import com.android.internal.util.Protocol;
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import com.android.server.wifi.hotspot2.AnqpEvent;
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import com.android.server.wifi.hotspot2.IconEvent;
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import com.android.server.wifi.hotspot2.WnmData;
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import com.android.server.wifi.util.TelephonyUtil.SimAuthRequestData;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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/**
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* Listen for events from the wpa_supplicant & wificond and broadcast them on
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* to the various {@link ClientModeImpl} modules interested in handling these events.
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* @hide
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*/
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public class WifiMonitor {
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private static final String TAG = "WifiMonitor";
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/* Supplicant events reported to a state machine */
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private static final int BASE = Protocol.BASE_WIFI_MONITOR;
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/* Connection to supplicant established */
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public static final int SUP_CONNECTION_EVENT = BASE + 1;
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/* Connection to supplicant lost */
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public static final int SUP_DISCONNECTION_EVENT = BASE + 2;
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/* Network connection completed */
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public static final int NETWORK_CONNECTION_EVENT = BASE + 3;
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/* Network disconnection completed */
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public static final int NETWORK_DISCONNECTION_EVENT = BASE + 4;
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/* Scan results are available */
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public static final int SCAN_RESULTS_EVENT = BASE + 5;
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/* Supplicate state changed */
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public static final int SUPPLICANT_STATE_CHANGE_EVENT = BASE + 6;
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/* Password failure and EAP authentication failure */
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public static final int AUTHENTICATION_FAILURE_EVENT = BASE + 7;
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/* WPS success detected */
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public static final int WPS_SUCCESS_EVENT = BASE + 8;
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/* WPS failure detected */
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public static final int WPS_FAIL_EVENT = BASE + 9;
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/* WPS overlap detected */
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public static final int WPS_OVERLAP_EVENT = BASE + 10;
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/* WPS timeout detected */
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public static final int WPS_TIMEOUT_EVENT = BASE + 11;
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/* Request Identity */
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public static final int SUP_REQUEST_IDENTITY = BASE + 15;
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/* Request SIM Auth */
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public static final int SUP_REQUEST_SIM_AUTH = BASE + 16;
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public static final int SCAN_FAILED_EVENT = BASE + 17;
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/* Pno scan results are available */
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public static final int PNO_SCAN_RESULTS_EVENT = BASE + 18;
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/* Indicates assoc reject event */
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public static final int ASSOCIATION_REJECTION_EVENT = BASE + 43;
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public static final int ANQP_DONE_EVENT = BASE + 44;
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/* hotspot 2.0 ANQP events */
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public static final int GAS_QUERY_START_EVENT = BASE + 51;
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public static final int GAS_QUERY_DONE_EVENT = BASE + 52;
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public static final int RX_HS20_ANQP_ICON_EVENT = BASE + 53;
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/* hotspot 2.0 events */
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public static final int HS20_REMEDIATION_EVENT = BASE + 61;
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/* WPS config errrors */
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private static final int CONFIG_MULTIPLE_PBC_DETECTED = 12;
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private static final int CONFIG_AUTH_FAILURE = 18;
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/* WPS error indications */
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private static final int REASON_TKIP_ONLY_PROHIBITED = 1;
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private static final int REASON_WEP_PROHIBITED = 2;
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private final WifiInjector mWifiInjector;
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private boolean mVerboseLoggingEnabled = false;
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private boolean mConnected = false;
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public WifiMonitor(WifiInjector wifiInjector) {
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mWifiInjector = wifiInjector;
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}
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void enableVerboseLogging(int verbose) {
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if (verbose > 0) {
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mVerboseLoggingEnabled = true;
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} else {
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mVerboseLoggingEnabled = false;
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}
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}
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private final Map<String, SparseArray<Set<Handler>>> mHandlerMap = new HashMap<>();
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public synchronized void registerHandler(String iface, int what, Handler handler) {
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SparseArray<Set<Handler>> ifaceHandlers = mHandlerMap.get(iface);
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if (ifaceHandlers == null) {
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ifaceHandlers = new SparseArray<>();
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mHandlerMap.put(iface, ifaceHandlers);
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}
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Set<Handler> ifaceWhatHandlers = ifaceHandlers.get(what);
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if (ifaceWhatHandlers == null) {
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ifaceWhatHandlers = new ArraySet<>();
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ifaceHandlers.put(what, ifaceWhatHandlers);
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}
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ifaceWhatHandlers.add(handler);
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}
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/**
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* Deregister the given |handler|
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* @param iface
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* @param what
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* @param handler
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*/
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public synchronized void deregisterHandler(String iface, int what, Handler handler) {
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SparseArray<Set<Handler>> ifaceHandlers = mHandlerMap.get(iface);
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if (ifaceHandlers == null) {
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return;
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}
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Set<Handler> ifaceWhatHandlers = ifaceHandlers.get(what);
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if (ifaceWhatHandlers == null) {
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return;
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}
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ifaceWhatHandlers.remove(handler);
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}
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private final Map<String, Boolean> mMonitoringMap = new HashMap<>();
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private boolean isMonitoring(String iface) {
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Boolean val = mMonitoringMap.get(iface);
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if (val == null) {
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return false;
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} else {
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return val.booleanValue();
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}
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}
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/**
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* Enable/Disable monitoring for the provided iface.
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*
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* @param iface Name of the iface.
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* @param enabled true to enable, false to disable.
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*/
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@VisibleForTesting
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public void setMonitoring(String iface, boolean enabled) {
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mMonitoringMap.put(iface, enabled);
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}
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private void setMonitoringNone() {
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for (String iface : mMonitoringMap.keySet()) {
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setMonitoring(iface, false);
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}
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}
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/**
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* Start Monitoring for wpa_supplicant events.
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*
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* @param iface Name of iface.
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*/
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public synchronized void startMonitoring(String iface) {
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if (mVerboseLoggingEnabled) Log.d(TAG, "startMonitoring(" + iface + ")");
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setMonitoring(iface, true);
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broadcastSupplicantConnectionEvent(iface);
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}
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/**
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* Stop Monitoring for wpa_supplicant events.
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*
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* @param iface Name of iface.
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*/
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public synchronized void stopMonitoring(String iface) {
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if (mVerboseLoggingEnabled) Log.d(TAG, "stopMonitoring(" + iface + ")");
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setMonitoring(iface, true);
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broadcastSupplicantDisconnectionEvent(iface);
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setMonitoring(iface, false);
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}
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/**
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* Stop Monitoring for wpa_supplicant events.
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*
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* TODO: Add unit tests for these once we remove the legacy code.
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*/
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public synchronized void stopAllMonitoring() {
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mConnected = false;
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setMonitoringNone();
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}
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/**
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* Similar functions to Handler#sendMessage that send the message to the registered handler
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* for the given interface and message what.
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* All of these should be called with the WifiMonitor class lock
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*/
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private void sendMessage(String iface, int what) {
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sendMessage(iface, Message.obtain(null, what));
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}
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private void sendMessage(String iface, int what, Object obj) {
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sendMessage(iface, Message.obtain(null, what, obj));
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}
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private void sendMessage(String iface, int what, int arg1) {
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sendMessage(iface, Message.obtain(null, what, arg1, 0));
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}
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private void sendMessage(String iface, int what, int arg1, int arg2) {
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sendMessage(iface, Message.obtain(null, what, arg1, arg2));
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}
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private void sendMessage(String iface, int what, int arg1, int arg2, Object obj) {
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sendMessage(iface, Message.obtain(null, what, arg1, arg2, obj));
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}
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private void sendMessage(String iface, Message message) {
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SparseArray<Set<Handler>> ifaceHandlers = mHandlerMap.get(iface);
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if (iface != null && ifaceHandlers != null) {
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if (isMonitoring(iface)) {
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Set<Handler> ifaceWhatHandlers = ifaceHandlers.get(message.what);
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if (ifaceWhatHandlers != null) {
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for (Handler handler : ifaceWhatHandlers) {
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if (handler != null) {
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sendMessage(handler, Message.obtain(message));
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}
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}
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}
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} else {
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if (mVerboseLoggingEnabled) {
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Log.d(TAG, "Dropping event because (" + iface + ") is stopped");
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}
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}
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} else {
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if (mVerboseLoggingEnabled) {
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Log.d(TAG, "Sending to all monitors because there's no matching iface");
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}
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for (Map.Entry<String, SparseArray<Set<Handler>>> entry : mHandlerMap.entrySet()) {
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if (isMonitoring(entry.getKey())) {
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Set<Handler> ifaceWhatHandlers = entry.getValue().get(message.what);
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for (Handler handler : ifaceWhatHandlers) {
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if (handler != null) {
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sendMessage(handler, Message.obtain(message));
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}
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}
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}
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}
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}
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message.recycle();
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}
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private void sendMessage(Handler handler, Message message) {
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message.setTarget(handler);
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message.sendToTarget();
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}
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/**
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* Broadcast the WPS fail event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param cfgError Configuration error code.
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* @param vendorErrorCode Vendor specific error indication code.
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*/
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public void broadcastWpsFailEvent(String iface, int cfgError, int vendorErrorCode) {
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int reason = 0;
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switch(vendorErrorCode) {
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case REASON_TKIP_ONLY_PROHIBITED:
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sendMessage(iface, WPS_FAIL_EVENT, WifiManager.WPS_TKIP_ONLY_PROHIBITED);
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return;
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case REASON_WEP_PROHIBITED:
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sendMessage(iface, WPS_FAIL_EVENT, WifiManager.WPS_WEP_PROHIBITED);
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return;
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default:
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reason = vendorErrorCode;
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break;
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}
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switch(cfgError) {
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case CONFIG_AUTH_FAILURE:
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sendMessage(iface, WPS_FAIL_EVENT, WifiManager.WPS_AUTH_FAILURE);
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return;
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case CONFIG_MULTIPLE_PBC_DETECTED:
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sendMessage(iface, WPS_FAIL_EVENT, WifiManager.WPS_OVERLAP_ERROR);
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return;
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default:
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if (reason == 0) {
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reason = cfgError;
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}
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break;
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}
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//For all other errors, return a generic internal error
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sendMessage(iface, WPS_FAIL_EVENT, WifiManager.ERROR, reason);
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}
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/**
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* Broadcast the WPS succes event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastWpsSuccessEvent(String iface) {
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sendMessage(iface, WPS_SUCCESS_EVENT);
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}
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/**
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* Broadcast the WPS overlap event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastWpsOverlapEvent(String iface) {
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sendMessage(iface, WPS_OVERLAP_EVENT);
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}
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/**
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* Broadcast the WPS timeout event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastWpsTimeoutEvent(String iface) {
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sendMessage(iface, WPS_TIMEOUT_EVENT);
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}
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/**
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* Broadcast the ANQP done event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param anqpEvent ANQP result retrieved.
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*/
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public void broadcastAnqpDoneEvent(String iface, AnqpEvent anqpEvent) {
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sendMessage(iface, ANQP_DONE_EVENT, anqpEvent);
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}
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/**
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* Broadcast the Icon done event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param iconEvent Instance of IconEvent containing the icon data retrieved.
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*/
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public void broadcastIconDoneEvent(String iface, IconEvent iconEvent) {
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sendMessage(iface, RX_HS20_ANQP_ICON_EVENT, iconEvent);
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}
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/**
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* Broadcast the WNM event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param wnmData Instance of WnmData containing the event data.
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*/
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public void broadcastWnmEvent(String iface, WnmData wnmData) {
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sendMessage(iface, HS20_REMEDIATION_EVENT, wnmData);
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}
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/**
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* Broadcast the Network identity request event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param networkId ID of the network in wpa_supplicant.
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* @param ssid SSID of the network.
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*/
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public void broadcastNetworkIdentityRequestEvent(String iface, int networkId, String ssid) {
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sendMessage(iface, SUP_REQUEST_IDENTITY, 0, networkId, ssid);
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}
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/**
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* Broadcast the Network Gsm Sim auth request event to all the handlers registered for this
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* event.
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*
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* @param iface Name of iface on which this occurred.
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* @param networkId ID of the network in wpa_supplicant.
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* @param ssid SSID of the network.
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* @param data Accompanying event data.
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*/
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public void broadcastNetworkGsmAuthRequestEvent(String iface, int networkId, String ssid,
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String[] data) {
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sendMessage(iface, SUP_REQUEST_SIM_AUTH,
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new SimAuthRequestData(networkId, WifiEnterpriseConfig.Eap.SIM, ssid, data));
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}
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/**
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* Broadcast the Network Umts Sim auth request event to all the handlers registered for this
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* event.
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*
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* @param iface Name of iface on which this occurred.
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* @param networkId ID of the network in wpa_supplicant.
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* @param ssid SSID of the network.
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* @param data Accompanying event data.
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*/
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public void broadcastNetworkUmtsAuthRequestEvent(String iface, int networkId, String ssid,
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String[] data) {
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sendMessage(iface, SUP_REQUEST_SIM_AUTH,
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new SimAuthRequestData(networkId, WifiEnterpriseConfig.Eap.AKA, ssid, data));
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}
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/**
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* Broadcast scan result event to all the handlers registered for this event.
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastScanResultEvent(String iface) {
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sendMessage(iface, SCAN_RESULTS_EVENT);
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}
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/**
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* Broadcast pno scan result event to all the handlers registered for this event.
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastPnoScanResultEvent(String iface) {
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sendMessage(iface, PNO_SCAN_RESULTS_EVENT);
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}
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/**
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* Broadcast scan failed event to all the handlers registered for this event.
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastScanFailedEvent(String iface) {
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sendMessage(iface, SCAN_FAILED_EVENT);
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}
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/**
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* Broadcast the authentication failure event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param reason Reason for authentication failure. This has to be one of the
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* {@link android.net.wifi.WifiManager#ERROR_AUTH_FAILURE_NONE},
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* {@link android.net.wifi.WifiManager#ERROR_AUTH_FAILURE_TIMEOUT},
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* {@link android.net.wifi.WifiManager#ERROR_AUTH_FAILURE_WRONG_PSWD},
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* {@link android.net.wifi.WifiManager#ERROR_AUTH_FAILURE_EAP_FAILURE}
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* @param errorCode Error code associated with the authentication failure event.
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* A value of -1 is used when no error code is reported.
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*/
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public void broadcastAuthenticationFailureEvent(String iface, int reason, int errorCode) {
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sendMessage(iface, AUTHENTICATION_FAILURE_EVENT, reason, errorCode);
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}
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/**
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* Broadcast the association rejection event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param status Status code for association rejection.
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* @param timedOut Indicates if the association timed out.
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* @param bssid BSSID of the access point from which we received the reject.
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*/
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public void broadcastAssociationRejectionEvent(String iface, int status, boolean timedOut,
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String bssid) {
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sendMessage(iface, ASSOCIATION_REJECTION_EVENT, timedOut ? 1 : 0, status, bssid);
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}
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/**
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* Broadcast the association success event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param bssid BSSID of the access point.
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*/
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public void broadcastAssociatedBssidEvent(String iface, String bssid) {
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sendMessage(iface, ClientModeImpl.CMD_ASSOCIATED_BSSID, 0, 0, bssid);
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}
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/**
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* Broadcast the start of association event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param bssid BSSID of the access point.
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*/
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public void broadcastTargetBssidEvent(String iface, String bssid) {
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sendMessage(iface, ClientModeImpl.CMD_TARGET_BSSID, 0, 0, bssid);
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}
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/**
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* Broadcast the network connection event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param networkId ID of the network in wpa_supplicant.
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* @param bssid BSSID of the access point.
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*/
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public void broadcastNetworkConnectionEvent(String iface, int networkId, String bssid) {
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sendMessage(iface, NETWORK_CONNECTION_EVENT, networkId, 0, bssid);
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}
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/**
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* Broadcast the network disconnection event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param local Whether the disconnect was locally triggered.
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* @param reason Disconnect reason code.
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* @param bssid BSSID of the access point.
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*/
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public void broadcastNetworkDisconnectionEvent(String iface, int local, int reason,
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String bssid) {
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sendMessage(iface, NETWORK_DISCONNECTION_EVENT, local, reason, bssid);
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}
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/**
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* Broadcast the supplicant state change event to all the handlers registered for this event.
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*
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* @param iface Name of iface on which this occurred.
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* @param networkId ID of the network in wpa_supplicant.
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* @param bssid BSSID of the access point.
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* @param newSupplicantState New supplicant state.
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*/
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public void broadcastSupplicantStateChangeEvent(String iface, int networkId, WifiSsid wifiSsid,
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String bssid,
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SupplicantState newSupplicantState) {
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sendMessage(iface, SUPPLICANT_STATE_CHANGE_EVENT, 0, 0,
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new StateChangeResult(networkId, wifiSsid, bssid, newSupplicantState));
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}
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/**
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* Broadcast the connection to wpa_supplicant event to all the handlers registered for
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* this event.
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*
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastSupplicantConnectionEvent(String iface) {
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sendMessage(iface, SUP_CONNECTION_EVENT);
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}
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/**
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* Broadcast the loss of connection to wpa_supplicant event to all the handlers registered for
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* this event.
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*
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* @param iface Name of iface on which this occurred.
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*/
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public void broadcastSupplicantDisconnectionEvent(String iface) {
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sendMessage(iface, SUP_DISCONNECTION_EVENT);
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}
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}
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