AccessPoint.java revision 402be0628c3c27273e826344ec7b12d53f861152 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settingslib.wifi;
18
19import android.content.Context;
20import android.net.ConnectivityManager;
21import android.net.Network;
22import android.net.NetworkCapabilities;
23import android.net.NetworkInfo;
24import android.net.NetworkInfo.DetailedState;
25import android.net.NetworkInfo.State;
26import android.net.wifi.IWifiManager;
27import android.net.wifi.ScanResult;
28import android.net.wifi.WifiConfiguration;
29import android.net.wifi.WifiConfiguration.KeyMgmt;
30import android.net.wifi.WifiInfo;
31import android.net.wifi.WifiManager;
32import android.os.Bundle;
33import android.text.TextUtils;
34import android.os.RemoteException;
35import android.os.ServiceManager;
36import android.util.Log;
37import android.util.LruCache;
38import android.content.pm.ApplicationInfo;
39import android.content.pm.IPackageManager;
40import android.content.pm.PackageManager;
41import android.os.UserHandle;
42import android.os.RemoteException;
43import android.app.AppGlobals;
44
45import com.android.settingslib.R;
46
47import java.util.Map;
48
49
50public class AccessPoint implements Comparable<AccessPoint> {
51    static final String TAG = "SettingsLib.AccessPoint";
52
53    /**
54     * Lower bound on the 2.4 GHz (802.11b/g/n) WLAN channels
55     */
56    public static final int LOWER_FREQ_24GHZ = 2400;
57
58    /**
59     * Upper bound on the 2.4 GHz (802.11b/g/n) WLAN channels
60     */
61    public static final int HIGHER_FREQ_24GHZ = 2500;
62
63    /**
64     * Lower bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
65     */
66    public static final int LOWER_FREQ_5GHZ = 4900;
67
68    /**
69     * Upper bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
70     */
71    public static final int HIGHER_FREQ_5GHZ = 5900;
72
73
74    /**
75     * Experimental: we should be able to show the user the list of BSSIDs and bands
76     *  for that SSID.
77     *  For now this data is used only with Verbose Logging so as to show the band and number
78     *  of BSSIDs on which that network is seen.
79     */
80    public LruCache<String, ScanResult> mScanResultCache;
81    private static final String KEY_NETWORKINFO = "key_networkinfo";
82    private static final String KEY_WIFIINFO = "key_wifiinfo";
83    private static final String KEY_SCANRESULT = "key_scanresult";
84    private static final String KEY_CONFIG = "key_config";
85
86    /**
87     * These values are matched in string arrays -- changes must be kept in sync
88     */
89    public static final int SECURITY_NONE = 0;
90    public static final int SECURITY_WEP = 1;
91    public static final int SECURITY_PSK = 2;
92    public static final int SECURITY_EAP = 3;
93
94    private static final int PSK_UNKNOWN = 0;
95    private static final int PSK_WPA = 1;
96    private static final int PSK_WPA2 = 2;
97    private static final int PSK_WPA_WPA2 = 3;
98
99    private static final int VISIBILITY_OUTDATED_AGE_IN_MILLI = 20000;
100    private final Context mContext;
101
102    private String ssid;
103    private int security;
104    private int networkId = WifiConfiguration.INVALID_NETWORK_ID;
105
106    private int pskType = PSK_UNKNOWN;
107
108    private WifiConfiguration mConfig;
109    private ScanResult mScanResult;
110
111    private int mRssi = Integer.MAX_VALUE;
112    private long mSeen = 0;
113
114    private WifiInfo mInfo;
115    private NetworkInfo mNetworkInfo;
116    private AccessPointListener mAccessPointListener;
117
118    private Object mTag;
119
120    public AccessPoint(Context context, Bundle savedState) {
121        mContext = context;
122        mConfig = savedState.getParcelable(KEY_CONFIG);
123        if (mConfig != null) {
124            loadConfig(mConfig);
125        }
126        mScanResult = (ScanResult) savedState.getParcelable(KEY_SCANRESULT);
127        if (mScanResult != null) {
128            loadResult(mScanResult);
129        }
130        mInfo = (WifiInfo) savedState.getParcelable(KEY_WIFIINFO);
131        if (savedState.containsKey(KEY_NETWORKINFO)) {
132            mNetworkInfo = savedState.getParcelable(KEY_NETWORKINFO);
133        }
134        update(mInfo, mNetworkInfo);
135    }
136
137    AccessPoint(Context context, ScanResult result) {
138        mContext = context;
139        loadResult(result);
140    }
141
142    AccessPoint(Context context, WifiConfiguration config) {
143        mContext = context;
144        loadConfig(config);
145    }
146
147    @Override
148    public int compareTo(AccessPoint other) {
149        // Active one goes first.
150        if (isActive() && !other.isActive()) return -1;
151        if (!isActive() && other.isActive()) return 1;
152
153        // Reachable one goes before unreachable one.
154        if (mRssi != Integer.MAX_VALUE && other.mRssi == Integer.MAX_VALUE) return -1;
155        if (mRssi == Integer.MAX_VALUE && other.mRssi != Integer.MAX_VALUE) return 1;
156
157        // Configured one goes before unconfigured one.
158        if (networkId != WifiConfiguration.INVALID_NETWORK_ID
159                && other.networkId == WifiConfiguration.INVALID_NETWORK_ID) return -1;
160        if (networkId == WifiConfiguration.INVALID_NETWORK_ID
161                && other.networkId != WifiConfiguration.INVALID_NETWORK_ID) return 1;
162
163        // Sort by signal strength.
164        int difference = WifiManager.compareSignalLevel(other.mRssi, mRssi);
165        if (difference != 0) {
166            return difference;
167        }
168        // Sort by ssid.
169        return ssid.compareToIgnoreCase(other.ssid);
170    }
171
172    @Override
173    public boolean equals(Object other) {
174        if (!(other instanceof AccessPoint)) return false;
175        return (this.compareTo((AccessPoint) other) == 0);
176    }
177
178    @Override
179    public int hashCode() {
180        int result = 0;
181        if (mInfo != null) result += 13 * mInfo.hashCode();
182        result += 19 * mRssi;
183        result += 23 * networkId;
184        result += 29 * ssid.hashCode();
185        return result;
186    }
187
188    @Override
189    public String toString() {
190        StringBuilder builder = new StringBuilder().append("AccessPoint(")
191                .append(ssid);
192        if (isSaved()) {
193            builder.append(',').append("saved");
194        }
195        if (isActive()) {
196            builder.append(',').append("active");
197        }
198        if (isEphemeral()) {
199            builder.append(',').append("ephemeral");
200        }
201        if (isConnectable()) {
202            builder.append(',').append("connectable");
203        }
204        if (security != SECURITY_NONE) {
205            builder.append(',').append(securityToString(security, pskType));
206        }
207        return builder.append(')').toString();
208    }
209
210    public boolean matches(ScanResult result) {
211        return ssid.equals(result.SSID) && security == getSecurity(result);
212    }
213
214    public boolean matches(WifiConfiguration config) {
215        if (config.isPasspoint() && mConfig != null && mConfig.isPasspoint())
216            return config.FQDN.equals(mConfig.providerFriendlyName);
217        else
218            return ssid.equals(removeDoubleQuotes(config.SSID)) && security == getSecurity(config);
219    }
220
221    public WifiConfiguration getConfig() {
222        return mConfig;
223    }
224
225    public void clearConfig() {
226        mConfig = null;
227        networkId = WifiConfiguration.INVALID_NETWORK_ID;
228    }
229
230    public WifiInfo getInfo() {
231        return mInfo;
232    }
233
234    public int getLevel() {
235        if (mRssi == Integer.MAX_VALUE) {
236            return -1;
237        }
238        return WifiManager.calculateSignalLevel(mRssi, 4);
239    }
240
241    public NetworkInfo getNetworkInfo() {
242        return mNetworkInfo;
243    }
244
245    public int getSecurity() {
246        return security;
247    }
248
249    public String getSecurityString(boolean concise) {
250        Context context = mContext;
251        if (mConfig != null && mConfig.isPasspoint()) {
252            return context.getString(R.string.wifi_security_passpoint);
253        }
254        switch(security) {
255            case SECURITY_EAP:
256                return concise ? context.getString(R.string.wifi_security_short_eap) :
257                    context.getString(R.string.wifi_security_eap);
258            case SECURITY_PSK:
259                switch (pskType) {
260                    case PSK_WPA:
261                        return concise ? context.getString(R.string.wifi_security_short_wpa) :
262                            context.getString(R.string.wifi_security_wpa);
263                    case PSK_WPA2:
264                        return concise ? context.getString(R.string.wifi_security_short_wpa2) :
265                            context.getString(R.string.wifi_security_wpa2);
266                    case PSK_WPA_WPA2:
267                        return concise ? context.getString(R.string.wifi_security_short_wpa_wpa2) :
268                            context.getString(R.string.wifi_security_wpa_wpa2);
269                    case PSK_UNKNOWN:
270                    default:
271                        return concise ? context.getString(R.string.wifi_security_short_psk_generic)
272                                : context.getString(R.string.wifi_security_psk_generic);
273                }
274            case SECURITY_WEP:
275                return concise ? context.getString(R.string.wifi_security_short_wep) :
276                    context.getString(R.string.wifi_security_wep);
277            case SECURITY_NONE:
278            default:
279                return concise ? "" : context.getString(R.string.wifi_security_none);
280        }
281    }
282
283    public String getSsid() {
284        return ssid;
285    }
286
287    public String getConfigName() {
288        if (mConfig != null && mConfig.isPasspoint()) {
289            return mConfig.providerFriendlyName;
290        } else {
291            return ssid;
292        }
293    }
294
295    public DetailedState getDetailedState() {
296        return mNetworkInfo != null ? mNetworkInfo.getDetailedState() : null;
297    }
298
299    public String getSavedNetworkSummary() {
300        if (mConfig != null) {
301            PackageManager pm = mContext.getPackageManager();
302            String systemName = pm.getNameForUid(android.os.Process.SYSTEM_UID);
303            int userId = UserHandle.getUserId(mConfig.creatorUid);
304            ApplicationInfo appInfo = null;
305            if (mConfig.creatorName != null && mConfig.creatorName.equals(systemName)) {
306                appInfo = mContext.getApplicationInfo();
307            } else {
308                try {
309                    IPackageManager ipm = AppGlobals.getPackageManager();
310                    appInfo = ipm.getApplicationInfo(mConfig.creatorName, 0 /* flags */, userId);
311                } catch (RemoteException rex) {
312                }
313            }
314            if (appInfo != null &&
315                    !appInfo.packageName.equals(mContext.getString(R.string.settings_package)) &&
316                    !appInfo.packageName.equals(
317                    mContext.getString(R.string.certinstaller_package))) {
318                return mContext.getString(R.string.saved_network, appInfo.loadLabel(pm));
319            }
320        }
321        return "";
322    }
323
324    public String getSummary() {
325        return getSettingsSummary();
326    }
327
328    public String getSettingsSummary() {
329        // Update to new summary
330        StringBuilder summary = new StringBuilder();
331
332        if (isActive() && mConfig != null && mConfig.isPasspoint()) {
333            // This is the active connection on passpoint
334            summary.append(getSummary(mContext, getDetailedState(),
335                    false, mConfig.providerFriendlyName));
336        } else if (isActive()) {
337            // This is the active connection on non-passpoint network
338            summary.append(getSummary(mContext, getDetailedState(),
339                    networkId == WifiConfiguration.INVALID_NETWORK_ID));
340        } else if (mConfig != null && mConfig.isPasspoint()) {
341            String format = mContext.getString(R.string.available_via_passpoint);
342            summary.append(String.format(format, mConfig.providerFriendlyName));
343        } else if (mConfig != null && mConfig.hasNoInternetAccess()) {
344            summary.append(mContext.getString(R.string.wifi_no_internet));
345        } else if (mConfig != null && ((mConfig.status == WifiConfiguration.Status.DISABLED &&
346                mConfig.disableReason != WifiConfiguration.DISABLED_UNKNOWN_REASON)
347               || mConfig.autoJoinStatus
348                >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE)) {
349            if (mConfig.autoJoinStatus
350                    >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE) {
351                if (mConfig.disableReason == WifiConfiguration.DISABLED_DHCP_FAILURE) {
352                    summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
353                } else if (mConfig.disableReason == WifiConfiguration.DISABLED_AUTH_FAILURE) {
354                    summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
355                } else {
356                    summary.append(mContext.getString(R.string.wifi_disabled_wifi_failure));
357                }
358            } else {
359                switch (mConfig.disableReason) {
360                    case WifiConfiguration.DISABLED_AUTH_FAILURE:
361                        summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
362                        break;
363                    case WifiConfiguration.DISABLED_DHCP_FAILURE:
364                    case WifiConfiguration.DISABLED_DNS_FAILURE:
365                        summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
366                        break;
367                    case WifiConfiguration.DISABLED_UNKNOWN_REASON:
368                    case WifiConfiguration.DISABLED_ASSOCIATION_REJECT:
369                        summary.append(mContext.getString(R.string.wifi_disabled_generic));
370                        break;
371                }
372            }
373        } else if (mRssi == Integer.MAX_VALUE) { // Wifi out of range
374            summary.append(mContext.getString(R.string.wifi_not_in_range));
375        } else { // In range, not disabled.
376            if (mConfig != null) { // Is saved network
377                summary.append(mContext.getString(R.string.wifi_remembered));
378            }
379        }
380
381        if (WifiTracker.sVerboseLogging > 0) {
382            // Add RSSI/band information for this config, what was seen up to 6 seconds ago
383            // verbose WiFi Logging is only turned on thru developers settings
384            if (mInfo != null && mNetworkInfo != null) { // This is the active connection
385                summary.append(" f=" + Integer.toString(mInfo.getFrequency()));
386            }
387            summary.append(" " + getVisibilityStatus());
388            if (mConfig != null && mConfig.autoJoinStatus > 0) {
389                summary.append(" (" + mConfig.autoJoinStatus);
390                if (mConfig.blackListTimestamp > 0) {
391                    long now = System.currentTimeMillis();
392                    long diff = (now - mConfig.blackListTimestamp)/1000;
393                    long sec = diff%60; //seconds
394                    long min = (diff/60)%60; //minutes
395                    long hour = (min/60)%60; //hours
396                    summary.append(", ");
397                    if (hour > 0) summary.append(Long.toString(hour) + "h ");
398                    summary.append( Long.toString(min) + "m ");
399                    summary.append( Long.toString(sec) + "s ");
400                }
401                summary.append(")");
402            }
403            if (mConfig != null && mConfig.numIpConfigFailures > 0) {
404                summary.append(" ipf=").append(mConfig.numIpConfigFailures);
405            }
406            if (mConfig != null && mConfig.numConnectionFailures > 0) {
407                summary.append(" cf=").append(mConfig.numConnectionFailures);
408            }
409            if (mConfig != null && mConfig.numAuthFailures > 0) {
410                summary.append(" authf=").append(mConfig.numAuthFailures);
411            }
412            if (mConfig != null && mConfig.numNoInternetAccessReports > 0) {
413                summary.append(" noInt=").append(mConfig.numNoInternetAccessReports);
414            }
415        }
416        return summary.toString();
417    }
418
419    /**
420     * Returns the visibility status of the WifiConfiguration.
421     *
422     * @return autojoin debugging information
423     * TODO: use a string formatter
424     * ["rssi 5Ghz", "num results on 5GHz" / "rssi 5Ghz", "num results on 5GHz"]
425     * For instance [-40,5/-30,2]
426     */
427    private String getVisibilityStatus() {
428        StringBuilder visibility = new StringBuilder();
429        StringBuilder scans24GHz = null;
430        StringBuilder scans5GHz = null;
431        String bssid = null;
432
433        long now = System.currentTimeMillis();
434
435        if (mInfo != null) {
436            bssid = mInfo.getBSSID();
437            if (bssid != null) {
438                visibility.append(" ").append(bssid);
439            }
440            visibility.append(" rssi=").append(mInfo.getRssi());
441            visibility.append(" ");
442            visibility.append(" score=").append(mInfo.score);
443            visibility.append(String.format(" tx=%.1f,", mInfo.txSuccessRate));
444            visibility.append(String.format("%.1f,", mInfo.txRetriesRate));
445            visibility.append(String.format("%.1f ", mInfo.txBadRate));
446            visibility.append(String.format("rx=%.1f", mInfo.rxSuccessRate));
447        }
448
449        if (mScanResultCache != null) {
450            int rssi5 = WifiConfiguration.INVALID_RSSI;
451            int rssi24 = WifiConfiguration.INVALID_RSSI;
452            int num5 = 0;
453            int num24 = 0;
454            int numBlackListed = 0;
455            int n24 = 0; // Number scan results we included in the string
456            int n5 = 0; // Number scan results we included in the string
457            Map<String, ScanResult> list = mScanResultCache.snapshot();
458            // TODO: sort list by RSSI or age
459            for (ScanResult result : list.values()) {
460                if (result.seen == 0)
461                    continue;
462
463                if (result.autoJoinStatus != ScanResult.ENABLED) numBlackListed++;
464
465                if (result.frequency >= LOWER_FREQ_5GHZ
466                        && result.frequency <= HIGHER_FREQ_5GHZ) {
467                    // Strictly speaking: [4915, 5825]
468                    // number of known BSSID on 5GHz band
469                    num5 = num5 + 1;
470                } else if (result.frequency >= LOWER_FREQ_24GHZ
471                        && result.frequency <= HIGHER_FREQ_24GHZ) {
472                    // Strictly speaking: [2412, 2482]
473                    // number of known BSSID on 2.4Ghz band
474                    num24 = num24 + 1;
475                }
476
477                // Ignore results seen, older than 20 seconds
478                if (now - result.seen > VISIBILITY_OUTDATED_AGE_IN_MILLI) continue;
479
480                if (result.frequency >= LOWER_FREQ_5GHZ
481                        && result.frequency <= HIGHER_FREQ_5GHZ) {
482                    if (result.level > rssi5) {
483                        rssi5 = result.level;
484                    }
485                    if (n5 < 4) {
486                        if (scans5GHz == null) scans5GHz = new StringBuilder();
487                        scans5GHz.append(" \n{").append(result.BSSID);
488                        if (bssid != null && result.BSSID.equals(bssid)) scans5GHz.append("*");
489                        scans5GHz.append("=").append(result.frequency);
490                        scans5GHz.append(",").append(result.level);
491                        if (result.autoJoinStatus != 0) {
492                            scans5GHz.append(",st=").append(result.autoJoinStatus);
493                        }
494                        if (result.numIpConfigFailures != 0) {
495                            scans5GHz.append(",ipf=").append(result.numIpConfigFailures);
496                        }
497                        scans5GHz.append("}");
498                        n5++;
499                    }
500                } else if (result.frequency >= LOWER_FREQ_24GHZ
501                        && result.frequency <= HIGHER_FREQ_24GHZ) {
502                    if (result.level > rssi24) {
503                        rssi24 = result.level;
504                    }
505                    if (n24 < 4) {
506                        if (scans24GHz == null) scans24GHz = new StringBuilder();
507                        scans24GHz.append(" \n{").append(result.BSSID);
508                        if (bssid != null && result.BSSID.equals(bssid)) scans24GHz.append("*");
509                        scans24GHz.append("=").append(result.frequency);
510                        scans24GHz.append(",").append(result.level);
511                        if (result.autoJoinStatus != 0) {
512                            scans24GHz.append(",st=").append(result.autoJoinStatus);
513                        }
514                        if (result.numIpConfigFailures != 0) {
515                            scans24GHz.append(",ipf=").append(result.numIpConfigFailures);
516                        }
517                        scans24GHz.append("}");
518                        n24++;
519                    }
520                }
521            }
522            visibility.append(" [");
523            if (num24 > 0) {
524                visibility.append("(").append(num24).append(")");
525                if (n24 <= 4) {
526                    if (scans24GHz != null) {
527                        visibility.append(scans24GHz.toString());
528                    }
529                } else {
530                    visibility.append("max=").append(rssi24);
531                    if (scans24GHz != null) {
532                        visibility.append(",").append(scans24GHz.toString());
533                    }
534                }
535            }
536            visibility.append(";");
537            if (num5 > 0) {
538                visibility.append("(").append(num5).append(")");
539                if (n5 <= 4) {
540                    if (scans5GHz != null) {
541                        visibility.append(scans5GHz.toString());
542                    }
543                } else {
544                    visibility.append("max=").append(rssi5);
545                    if (scans5GHz != null) {
546                        visibility.append(",").append(scans5GHz.toString());
547                    }
548                }
549            }
550            if (numBlackListed > 0)
551                visibility.append("!").append(numBlackListed);
552            visibility.append("]");
553        } else {
554            if (mRssi != Integer.MAX_VALUE) {
555                visibility.append(" rssi=");
556                visibility.append(mRssi);
557                if (mScanResult != null) {
558                    visibility.append(", f=");
559                    visibility.append(mScanResult.frequency);
560                }
561            }
562        }
563
564        return visibility.toString();
565    }
566
567    /**
568     * Return whether this is the active connection.
569     * For ephemeral connections (networkId is invalid), this returns false if the network is
570     * disconnected.
571     */
572    public boolean isActive() {
573        return mNetworkInfo != null &&
574                (networkId != WifiConfiguration.INVALID_NETWORK_ID ||
575                 mNetworkInfo.getState() != State.DISCONNECTED);
576    }
577
578    public boolean isConnectable() {
579        return getLevel() != -1 && getDetailedState() == null;
580    }
581
582    public boolean isEphemeral() {
583        return !isSaved() && mNetworkInfo != null && mNetworkInfo.getState() != State.DISCONNECTED;
584    }
585
586    /** Return whether the given {@link WifiInfo} is for this access point. */
587    private boolean isInfoForThisAccessPoint(WifiInfo info) {
588        if (networkId != WifiConfiguration.INVALID_NETWORK_ID) {
589            return networkId == info.getNetworkId();
590        } else {
591            // Might be an ephemeral connection with no WifiConfiguration. Try matching on SSID.
592            // (Note that we only do this if the WifiConfiguration explicitly equals INVALID).
593            // TODO: Handle hex string SSIDs.
594            return ssid.equals(removeDoubleQuotes(info.getSSID()));
595        }
596    }
597
598    public boolean isSaved() {
599        return networkId != WifiConfiguration.INVALID_NETWORK_ID;
600    }
601
602    public Object getTag() {
603        return mTag;
604    }
605
606    public void setTag(Object tag) {
607        mTag = tag;
608    }
609
610    /**
611     * Generate and save a default wifiConfiguration with common values.
612     * Can only be called for unsecured networks.
613     */
614    public void generateOpenNetworkConfig() {
615        if (security != SECURITY_NONE)
616            throw new IllegalStateException();
617        if (mConfig != null)
618            return;
619        mConfig = new WifiConfiguration();
620        mConfig.SSID = AccessPoint.convertToQuotedString(ssid);
621        mConfig.allowedKeyManagement.set(KeyMgmt.NONE);
622    }
623
624    void loadConfig(WifiConfiguration config) {
625        if (config.isPasspoint())
626            ssid = config.providerFriendlyName;
627        else
628            ssid = (config.SSID == null ? "" : removeDoubleQuotes(config.SSID));
629
630        security = getSecurity(config);
631        networkId = config.networkId;
632        mConfig = config;
633    }
634
635    private void loadResult(ScanResult result) {
636        ssid = result.SSID;
637        security = getSecurity(result);
638        if (security == SECURITY_PSK)
639            pskType = getPskType(result);
640        mRssi = result.level;
641        mScanResult = result;
642        if (result.seen > mSeen) {
643            mSeen = result.seen;
644        }
645    }
646
647    public void saveWifiState(Bundle savedState) {
648        savedState.putParcelable(KEY_CONFIG, mConfig);
649        savedState.putParcelable(KEY_SCANRESULT, mScanResult);
650        savedState.putParcelable(KEY_WIFIINFO, mInfo);
651        if (mNetworkInfo != null) {
652            savedState.putParcelable(KEY_NETWORKINFO, mNetworkInfo);
653        }
654    }
655
656    public void setListener(AccessPointListener listener) {
657        mAccessPointListener = listener;
658    }
659
660    boolean update(ScanResult result) {
661        if (result.seen > mSeen) {
662            mSeen = result.seen;
663        }
664        if (WifiTracker.sVerboseLogging > 0) {
665            if (mScanResultCache == null) {
666                mScanResultCache = new LruCache<String, ScanResult>(32);
667            }
668            mScanResultCache.put(result.BSSID, result);
669        }
670
671        if (ssid.equals(result.SSID) && security == getSecurity(result)) {
672            if (WifiManager.compareSignalLevel(result.level, mRssi) > 0) {
673                int oldLevel = getLevel();
674                mRssi = result.level;
675                if (getLevel() != oldLevel && mAccessPointListener != null) {
676                    mAccessPointListener.onLevelChanged(this);
677                }
678            }
679            // This flag only comes from scans, is not easily saved in config
680            if (security == SECURITY_PSK) {
681                pskType = getPskType(result);
682            }
683            mScanResult = result;
684            if (mAccessPointListener != null) {
685                mAccessPointListener.onAccessPointChanged(this);
686            }
687            return true;
688        }
689        return false;
690    }
691
692    boolean update(WifiInfo info, NetworkInfo networkInfo) {
693        boolean reorder = false;
694        if (info != null && isInfoForThisAccessPoint(info)) {
695            reorder = (mInfo == null);
696            mRssi = info.getRssi();
697            mInfo = info;
698            mNetworkInfo = networkInfo;
699            if (mAccessPointListener != null) {
700                mAccessPointListener.onAccessPointChanged(this);
701            }
702        } else if (mInfo != null) {
703            reorder = true;
704            mInfo = null;
705            mNetworkInfo = null;
706            if (mAccessPointListener != null) {
707                mAccessPointListener.onAccessPointChanged(this);
708            }
709        }
710        return reorder;
711    }
712
713    void update(WifiConfiguration config) {
714        mConfig = config;
715        networkId = config.networkId;
716        if (mAccessPointListener != null) {
717            mAccessPointListener.onAccessPointChanged(this);
718        }
719    }
720
721    public static String getSummary(Context context, String ssid, DetailedState state,
722            boolean isEphemeral, String passpointProvider) {
723        if (state == DetailedState.CONNECTED && ssid == null) {
724            if (TextUtils.isEmpty(passpointProvider) == false) {
725                // Special case for connected + passpoint networks.
726                String format = context.getString(R.string.connected_via_passpoint);
727                return String.format(format, passpointProvider);
728            } else if (isEphemeral) {
729                // Special case for connected + ephemeral networks.
730                return context.getString(R.string.connected_via_wfa);
731            }
732        }
733
734        // Case when there is wifi connected without internet connectivity.
735        final ConnectivityManager cm = (ConnectivityManager)
736                context.getSystemService(Context.CONNECTIVITY_SERVICE);
737        if (state == DetailedState.CONNECTED) {
738            IWifiManager wifiManager = IWifiManager.Stub.asInterface(
739                    ServiceManager.getService(Context.WIFI_SERVICE));
740            Network nw;
741
742            try {
743                nw = wifiManager.getCurrentNetwork();
744            } catch (RemoteException e) {
745                nw = null;
746            }
747            NetworkCapabilities nc = cm.getNetworkCapabilities(nw);
748            if (nc != null && !nc.hasCapability(nc.NET_CAPABILITY_VALIDATED)) {
749                return context.getString(R.string.wifi_connected_no_internet);
750            }
751        }
752
753        String[] formats = context.getResources().getStringArray((ssid == null)
754                ? R.array.wifi_status : R.array.wifi_status_with_ssid);
755        int index = state.ordinal();
756
757        if (index >= formats.length || formats[index].length() == 0) {
758            return null;
759        }
760        return String.format(formats[index], ssid);
761    }
762
763    public static String getSummary(Context context, DetailedState state, boolean isEphemeral) {
764        return getSummary(context, null, state, isEphemeral, null);
765    }
766
767    public static String getSummary(Context context, DetailedState state, boolean isEphemeral,
768            String passpointProvider) {
769        return getSummary(context, null, state, isEphemeral, passpointProvider);
770    }
771
772    public static String convertToQuotedString(String string) {
773        return "\"" + string + "\"";
774    }
775
776    private static int getPskType(ScanResult result) {
777        boolean wpa = result.capabilities.contains("WPA-PSK");
778        boolean wpa2 = result.capabilities.contains("WPA2-PSK");
779        if (wpa2 && wpa) {
780            return PSK_WPA_WPA2;
781        } else if (wpa2) {
782            return PSK_WPA2;
783        } else if (wpa) {
784            return PSK_WPA;
785        } else {
786            Log.w(TAG, "Received abnormal flag string: " + result.capabilities);
787            return PSK_UNKNOWN;
788        }
789    }
790
791    private static int getSecurity(ScanResult result) {
792        if (result.capabilities.contains("WEP")) {
793            return SECURITY_WEP;
794        } else if (result.capabilities.contains("PSK")) {
795            return SECURITY_PSK;
796        } else if (result.capabilities.contains("EAP")) {
797            return SECURITY_EAP;
798        }
799        return SECURITY_NONE;
800    }
801
802    static int getSecurity(WifiConfiguration config) {
803        if (config.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
804            return SECURITY_PSK;
805        }
806        if (config.allowedKeyManagement.get(KeyMgmt.WPA_EAP) ||
807                config.allowedKeyManagement.get(KeyMgmt.IEEE8021X)) {
808            return SECURITY_EAP;
809        }
810        return (config.wepKeys[0] != null) ? SECURITY_WEP : SECURITY_NONE;
811    }
812
813    public static String securityToString(int security, int pskType) {
814        if (security == SECURITY_WEP) {
815            return "WEP";
816        } else if (security == SECURITY_PSK) {
817            if (pskType == PSK_WPA) {
818                return "WPA";
819            } else if (pskType == PSK_WPA2) {
820                return "WPA2";
821            } else if (pskType == PSK_WPA_WPA2) {
822                return "WPA_WPA2";
823            }
824            return "PSK";
825        } else if (security == SECURITY_EAP) {
826            return "EAP";
827        }
828        return "NONE";
829    }
830
831    static String removeDoubleQuotes(String string) {
832        if (TextUtils.isEmpty(string)) {
833            return "";
834        }
835        int length = string.length();
836        if ((length > 1) && (string.charAt(0) == '"')
837                && (string.charAt(length - 1) == '"')) {
838            return string.substring(1, length - 1);
839        }
840        return string;
841    }
842
843    public interface AccessPointListener {
844        void onAccessPointChanged(AccessPoint accessPoint);
845        void onLevelChanged(AccessPoint accessPoint);
846    }
847}
848