AccessPoint.java revision 56cfbfb0319dfed65b6307b1baf73cb9b92db9b9 
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.NetworkInfo;
21import android.net.NetworkInfo.DetailedState;
22import android.net.NetworkInfo.State;
23import android.net.wifi.ScanResult;
24import android.net.wifi.WifiConfiguration;
25import android.net.wifi.WifiConfiguration.KeyMgmt;
26import android.net.wifi.WifiInfo;
27import android.net.wifi.WifiManager;
28import android.os.Bundle;
29import android.text.TextUtils;
30import android.util.Log;
31import android.util.LruCache;
32import android.content.pm.ApplicationInfo;
33import android.content.pm.IPackageManager;
34import android.content.pm.PackageManager;
35import android.os.UserHandle;
36import android.os.RemoteException;
37import android.app.AppGlobals;
38
39import com.android.settingslib.R;
40
41import java.util.Map;
42
43
44public class AccessPoint implements Comparable<AccessPoint> {
45    static final String TAG = "SettingsLib.AccessPoint";
46
47    /**
48     * Lower bound on the 2.4 GHz (802.11b/g/n) WLAN channels
49     */
50    public static final int LOWER_FREQ_24GHZ = 2400;
51
52    /**
53     * Upper bound on the 2.4 GHz (802.11b/g/n) WLAN channels
54     */
55    public static final int HIGHER_FREQ_24GHZ = 2500;
56
57    /**
58     * Lower bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
59     */
60    public static final int LOWER_FREQ_5GHZ = 4900;
61
62    /**
63     * Upper bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
64     */
65    public static final int HIGHER_FREQ_5GHZ = 5900;
66
67
68    /**
69     * Experimental: we should be able to show the user the list of BSSIDs and bands
70     *  for that SSID.
71     *  For now this data is used only with Verbose Logging so as to show the band and number
72     *  of BSSIDs on which that network is seen.
73     */
74    public LruCache<String, ScanResult> mScanResultCache;
75    private static final String KEY_NETWORKINFO = "key_networkinfo";
76    private static final String KEY_WIFIINFO = "key_wifiinfo";
77    private static final String KEY_SCANRESULT = "key_scanresult";
78    private static final String KEY_CONFIG = "key_config";
79
80    /**
81     * These values are matched in string arrays -- changes must be kept in sync
82     */
83    public static final int SECURITY_NONE = 0;
84    public static final int SECURITY_WEP = 1;
85    public static final int SECURITY_PSK = 2;
86    public static final int SECURITY_EAP = 3;
87
88    private static final int PSK_UNKNOWN = 0;
89    private static final int PSK_WPA = 1;
90    private static final int PSK_WPA2 = 2;
91    private static final int PSK_WPA_WPA2 = 3;
92
93    private static final int VISIBILITY_OUTDATED_AGE_IN_MILLI = 20000;
94    private final Context mContext;
95
96    private String ssid;
97    private int security;
98    private int networkId = WifiConfiguration.INVALID_NETWORK_ID;
99
100    private int pskType = PSK_UNKNOWN;
101
102    private WifiConfiguration mConfig;
103    private ScanResult mScanResult;
104
105    private int mRssi = Integer.MAX_VALUE;
106    private long mSeen = 0;
107
108    private WifiInfo mInfo;
109    private NetworkInfo mNetworkInfo;
110    private AccessPointListener mAccessPointListener;
111
112    private Object mTag;
113
114    public AccessPoint(Context context, Bundle savedState) {
115        mContext = context;
116        mConfig = savedState.getParcelable(KEY_CONFIG);
117        if (mConfig != null) {
118            loadConfig(mConfig);
119        }
120        mScanResult = (ScanResult) savedState.getParcelable(KEY_SCANRESULT);
121        if (mScanResult != null) {
122            loadResult(mScanResult);
123        }
124        mInfo = (WifiInfo) savedState.getParcelable(KEY_WIFIINFO);
125        if (savedState.containsKey(KEY_NETWORKINFO)) {
126            mNetworkInfo = savedState.getParcelable(KEY_NETWORKINFO);
127        }
128        update(mInfo, mNetworkInfo);
129    }
130
131    AccessPoint(Context context, ScanResult result) {
132        mContext = context;
133        loadResult(result);
134    }
135
136    AccessPoint(Context context, WifiConfiguration config) {
137        mContext = context;
138        loadConfig(config);
139    }
140
141    @Override
142    public int compareTo(AccessPoint other) {
143        // Active one goes first.
144        if (isActive() && !other.isActive()) return -1;
145        if (!isActive() && other.isActive()) return 1;
146
147        // Reachable one goes before unreachable one.
148        if (mRssi != Integer.MAX_VALUE && other.mRssi == Integer.MAX_VALUE) return -1;
149        if (mRssi == Integer.MAX_VALUE && other.mRssi != Integer.MAX_VALUE) return 1;
150
151        // Configured one goes before unconfigured one.
152        if (networkId != WifiConfiguration.INVALID_NETWORK_ID
153                && other.networkId == WifiConfiguration.INVALID_NETWORK_ID) return -1;
154        if (networkId == WifiConfiguration.INVALID_NETWORK_ID
155                && other.networkId != WifiConfiguration.INVALID_NETWORK_ID) return 1;
156
157        // Sort by signal strength.
158        int difference = WifiManager.compareSignalLevel(other.mRssi, mRssi);
159        if (difference != 0) {
160            return difference;
161        }
162        // Sort by ssid.
163        return ssid.compareToIgnoreCase(other.ssid);
164    }
165
166    @Override
167    public boolean equals(Object other) {
168        if (!(other instanceof AccessPoint)) return false;
169        return (this.compareTo((AccessPoint) other) == 0);
170    }
171
172    @Override
173    public int hashCode() {
174        int result = 0;
175        if (mInfo != null) result += 13 * mInfo.hashCode();
176        result += 19 * mRssi;
177        result += 23 * networkId;
178        result += 29 * ssid.hashCode();
179        return result;
180    }
181
182    @Override
183    public String toString() {
184        StringBuilder builder = new StringBuilder().append("AccessPoint(")
185                .append(ssid);
186        if (isSaved()) {
187            builder.append(',').append("saved");
188        }
189        if (isActive()) {
190            builder.append(',').append("active");
191        }
192        if (isEphemeral()) {
193            builder.append(',').append("ephemeral");
194        }
195        if (isConnectable()) {
196            builder.append(',').append("connectable");
197        }
198        if (security != SECURITY_NONE) {
199            builder.append(',').append(securityToString(security, pskType));
200        }
201        return builder.append(')').toString();
202    }
203
204    public boolean matches(ScanResult result) {
205        return ssid.equals(result.SSID) && security == getSecurity(result);
206    }
207
208    public boolean matches(WifiConfiguration config) {
209        if (config.isPasspoint() && mConfig != null && mConfig.isPasspoint())
210            return config.FQDN.equals(mConfig.providerFriendlyName);
211        else
212            return ssid.equals(removeDoubleQuotes(config.SSID)) && security == getSecurity(config);
213    }
214
215    public WifiConfiguration getConfig() {
216        return mConfig;
217    }
218
219    public void clearConfig() {
220        mConfig = null;
221        networkId = WifiConfiguration.INVALID_NETWORK_ID;
222    }
223
224    public WifiInfo getInfo() {
225        return mInfo;
226    }
227
228    public int getLevel() {
229        if (mRssi == Integer.MAX_VALUE) {
230            return -1;
231        }
232        return WifiManager.calculateSignalLevel(mRssi, 4);
233    }
234
235    public NetworkInfo getNetworkInfo() {
236        return mNetworkInfo;
237    }
238
239    public int getSecurity() {
240        return security;
241    }
242
243    public String getSecurityString(boolean concise) {
244        Context context = mContext;
245        switch(security) {
246            case SECURITY_EAP:
247                return concise ? context.getString(R.string.wifi_security_short_eap) :
248                    context.getString(R.string.wifi_security_eap);
249            case SECURITY_PSK:
250                switch (pskType) {
251                    case PSK_WPA:
252                        return concise ? context.getString(R.string.wifi_security_short_wpa) :
253                            context.getString(R.string.wifi_security_wpa);
254                    case PSK_WPA2:
255                        return concise ? context.getString(R.string.wifi_security_short_wpa2) :
256                            context.getString(R.string.wifi_security_wpa2);
257                    case PSK_WPA_WPA2:
258                        return concise ? context.getString(R.string.wifi_security_short_wpa_wpa2) :
259                            context.getString(R.string.wifi_security_wpa_wpa2);
260                    case PSK_UNKNOWN:
261                    default:
262                        return concise ? context.getString(R.string.wifi_security_short_psk_generic)
263                                : context.getString(R.string.wifi_security_psk_generic);
264                }
265            case SECURITY_WEP:
266                return concise ? context.getString(R.string.wifi_security_short_wep) :
267                    context.getString(R.string.wifi_security_wep);
268            case SECURITY_NONE:
269            default:
270                return concise ? "" : context.getString(R.string.wifi_security_none);
271        }
272    }
273
274    public String getSsid() {
275        return ssid;
276    }
277
278    public String getConfigName() {
279        if (mConfig != null && mConfig.isPasspoint()) {
280            return mConfig.providerFriendlyName;
281        } else {
282            return ssid;
283        }
284    }
285
286    public DetailedState getDetailedState() {
287        return mNetworkInfo != null ? mNetworkInfo.getDetailedState() : null;
288    }
289
290    public String getSavedNetworkSummary() {
291        if (mConfig != null) {
292            PackageManager pm = mContext.getPackageManager();
293            String systemName = pm.getNameForUid(android.os.Process.SYSTEM_UID);
294            int userId = UserHandle.getUserId(mConfig.creatorUid);
295            ApplicationInfo appInfo = null;
296            if (mConfig.creatorName != null && mConfig.creatorName.equals(systemName)) {
297                appInfo = mContext.getApplicationInfo();
298            } else {
299                try {
300                    IPackageManager ipm = AppGlobals.getPackageManager();
301                    appInfo = ipm.getApplicationInfo(mConfig.creatorName, 0 /* flags */, userId);
302                } catch (RemoteException rex) {
303                }
304            }
305            if (appInfo != null &&
306                    !appInfo.packageName.equals(mContext.getString(R.string.settings_package)) &&
307                    !appInfo.packageName.equals(
308                    mContext.getString(R.string.certinstaller_package))) {
309                return mContext.getString(R.string.saved_network, appInfo.loadLabel(pm));
310            }
311        }
312        return "";
313    }
314
315    public String getSummary() {
316        return getSettingsSummary();
317    }
318
319    public String getSettingsSummary() {
320        // Update to new summary
321        StringBuilder summary = new StringBuilder();
322
323        if (isActive() && mConfig != null && mConfig.isPasspoint()) {
324            // This is the active connection on passpoint
325            summary.append(getSummary(mContext, getDetailedState(),
326                    false, mConfig.providerFriendlyName));
327        } else if (isActive()) {
328            // This is the active connection on non-passpoint network
329            summary.append(getSummary(mContext, getDetailedState(),
330                    networkId == WifiConfiguration.INVALID_NETWORK_ID));
331        } else if (mConfig != null && mConfig.isPasspoint()) {
332            String format = mContext.getString(R.string.available_via_passpoint);
333            summary.append(String.format(format, mConfig.providerFriendlyName));
334        } else if (mConfig != null && mConfig.hasNoInternetAccess()) {
335            summary.append(mContext.getString(R.string.wifi_no_internet));
336        } else if (mConfig != null && ((mConfig.status == WifiConfiguration.Status.DISABLED &&
337                mConfig.disableReason != WifiConfiguration.DISABLED_UNKNOWN_REASON)
338               || mConfig.autoJoinStatus
339                >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE)) {
340            if (mConfig.autoJoinStatus
341                    >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE) {
342                if (mConfig.disableReason == WifiConfiguration.DISABLED_DHCP_FAILURE) {
343                    summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
344                } else if (mConfig.disableReason == WifiConfiguration.DISABLED_AUTH_FAILURE) {
345                    summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
346                } else {
347                    summary.append(mContext.getString(R.string.wifi_disabled_wifi_failure));
348                }
349            } else {
350                switch (mConfig.disableReason) {
351                    case WifiConfiguration.DISABLED_AUTH_FAILURE:
352                        summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
353                        break;
354                    case WifiConfiguration.DISABLED_DHCP_FAILURE:
355                    case WifiConfiguration.DISABLED_DNS_FAILURE:
356                        summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
357                        break;
358                    case WifiConfiguration.DISABLED_UNKNOWN_REASON:
359                    case WifiConfiguration.DISABLED_ASSOCIATION_REJECT:
360                        summary.append(mContext.getString(R.string.wifi_disabled_generic));
361                        break;
362                }
363            }
364        } else if (mRssi == Integer.MAX_VALUE) { // Wifi out of range
365            summary.append(mContext.getString(R.string.wifi_not_in_range));
366        } else { // In range, not disabled.
367            if (mConfig != null) { // Is saved network
368                summary.append(mContext.getString(R.string.wifi_remembered));
369            }
370        }
371
372        if (WifiTracker.sVerboseLogging > 0) {
373            // Add RSSI/band information for this config, what was seen up to 6 seconds ago
374            // verbose WiFi Logging is only turned on thru developers settings
375            if (mInfo != null && mNetworkInfo != null) { // This is the active connection
376                summary.append(" f=" + Integer.toString(mInfo.getFrequency()));
377            }
378            summary.append(" " + getVisibilityStatus());
379            if (mConfig != null && mConfig.autoJoinStatus > 0) {
380                summary.append(" (" + mConfig.autoJoinStatus);
381                if (mConfig.blackListTimestamp > 0) {
382                    long now = System.currentTimeMillis();
383                    long diff = (now - mConfig.blackListTimestamp)/1000;
384                    long sec = diff%60; //seconds
385                    long min = (diff/60)%60; //minutes
386                    long hour = (min/60)%60; //hours
387                    summary.append(", ");
388                    if (hour > 0) summary.append(Long.toString(hour) + "h ");
389                    summary.append( Long.toString(min) + "m ");
390                    summary.append( Long.toString(sec) + "s ");
391                }
392                summary.append(")");
393            }
394            if (mConfig != null && mConfig.numIpConfigFailures > 0) {
395                summary.append(" ipf=").append(mConfig.numIpConfigFailures);
396            }
397            if (mConfig != null && mConfig.numConnectionFailures > 0) {
398                summary.append(" cf=").append(mConfig.numConnectionFailures);
399            }
400            if (mConfig != null && mConfig.numAuthFailures > 0) {
401                summary.append(" authf=").append(mConfig.numAuthFailures);
402            }
403            if (mConfig != null && mConfig.numNoInternetAccessReports > 0) {
404                summary.append(" noInt=").append(mConfig.numNoInternetAccessReports);
405            }
406        }
407        return summary.toString();
408    }
409
410    /**
411     * Returns the visibility status of the WifiConfiguration.
412     *
413     * @return autojoin debugging information
414     * TODO: use a string formatter
415     * ["rssi 5Ghz", "num results on 5GHz" / "rssi 5Ghz", "num results on 5GHz"]
416     * For instance [-40,5/-30,2]
417     */
418    private String getVisibilityStatus() {
419        StringBuilder visibility = new StringBuilder();
420        StringBuilder scans24GHz = null;
421        StringBuilder scans5GHz = null;
422        String bssid = null;
423
424        long now = System.currentTimeMillis();
425
426        if (mInfo != null) {
427            bssid = mInfo.getBSSID();
428            if (bssid != null) {
429                visibility.append(" ").append(bssid);
430            }
431            visibility.append(" rssi=").append(mInfo.getRssi());
432            visibility.append(" ");
433            visibility.append(" score=").append(mInfo.score);
434            visibility.append(String.format(" tx=%.1f,", mInfo.txSuccessRate));
435            visibility.append(String.format("%.1f,", mInfo.txRetriesRate));
436            visibility.append(String.format("%.1f ", mInfo.txBadRate));
437            visibility.append(String.format("rx=%.1f", mInfo.rxSuccessRate));
438        }
439
440        if (mScanResultCache != null) {
441            int rssi5 = WifiConfiguration.INVALID_RSSI;
442            int rssi24 = WifiConfiguration.INVALID_RSSI;
443            int num5 = 0;
444            int num24 = 0;
445            int numBlackListed = 0;
446            int n24 = 0; // Number scan results we included in the string
447            int n5 = 0; // Number scan results we included in the string
448            Map<String, ScanResult> list = mScanResultCache.snapshot();
449            // TODO: sort list by RSSI or age
450            for (ScanResult result : list.values()) {
451                if (result.seen == 0)
452                    continue;
453
454                if (result.autoJoinStatus != ScanResult.ENABLED) numBlackListed++;
455
456                if (result.frequency >= LOWER_FREQ_5GHZ
457                        && result.frequency <= HIGHER_FREQ_5GHZ) {
458                    // Strictly speaking: [4915, 5825]
459                    // number of known BSSID on 5GHz band
460                    num5 = num5 + 1;
461                } else if (result.frequency >= LOWER_FREQ_24GHZ
462                        && result.frequency <= HIGHER_FREQ_24GHZ) {
463                    // Strictly speaking: [2412, 2482]
464                    // number of known BSSID on 2.4Ghz band
465                    num24 = num24 + 1;
466                }
467
468                // Ignore results seen, older than 20 seconds
469                if (now - result.seen > VISIBILITY_OUTDATED_AGE_IN_MILLI) continue;
470
471                if (result.frequency >= LOWER_FREQ_5GHZ
472                        && result.frequency <= HIGHER_FREQ_5GHZ) {
473                    if (result.level > rssi5) {
474                        rssi5 = result.level;
475                    }
476                    if (n5 < 4) {
477                        if (scans5GHz == null) scans5GHz = new StringBuilder();
478                        scans5GHz.append(" \n{").append(result.BSSID);
479                        if (bssid != null && result.BSSID.equals(bssid)) scans5GHz.append("*");
480                        scans5GHz.append("=").append(result.frequency);
481                        scans5GHz.append(",").append(result.level);
482                        if (result.autoJoinStatus != 0) {
483                            scans5GHz.append(",st=").append(result.autoJoinStatus);
484                        }
485                        if (result.numIpConfigFailures != 0) {
486                            scans5GHz.append(",ipf=").append(result.numIpConfigFailures);
487                        }
488                        scans5GHz.append("}");
489                        n5++;
490                    }
491                } else if (result.frequency >= LOWER_FREQ_24GHZ
492                        && result.frequency <= HIGHER_FREQ_24GHZ) {
493                    if (result.level > rssi24) {
494                        rssi24 = result.level;
495                    }
496                    if (n24 < 4) {
497                        if (scans24GHz == null) scans24GHz = new StringBuilder();
498                        scans24GHz.append(" \n{").append(result.BSSID);
499                        if (bssid != null && result.BSSID.equals(bssid)) scans24GHz.append("*");
500                        scans24GHz.append("=").append(result.frequency);
501                        scans24GHz.append(",").append(result.level);
502                        if (result.autoJoinStatus != 0) {
503                            scans24GHz.append(",st=").append(result.autoJoinStatus);
504                        }
505                        if (result.numIpConfigFailures != 0) {
506                            scans24GHz.append(",ipf=").append(result.numIpConfigFailures);
507                        }
508                        scans24GHz.append("}");
509                        n24++;
510                    }
511                }
512            }
513            visibility.append(" [");
514            if (num24 > 0) {
515                visibility.append("(").append(num24).append(")");
516                if (n24 <= 4) {
517                    if (scans24GHz != null) {
518                        visibility.append(scans24GHz.toString());
519                    }
520                } else {
521                    visibility.append("max=").append(rssi24);
522                    if (scans24GHz != null) {
523                        visibility.append(",").append(scans24GHz.toString());
524                    }
525                }
526            }
527            visibility.append(";");
528            if (num5 > 0) {
529                visibility.append("(").append(num5).append(")");
530                if (n5 <= 4) {
531                    if (scans5GHz != null) {
532                        visibility.append(scans5GHz.toString());
533                    }
534                } else {
535                    visibility.append("max=").append(rssi5);
536                    if (scans5GHz != null) {
537                        visibility.append(",").append(scans5GHz.toString());
538                    }
539                }
540            }
541            if (numBlackListed > 0)
542                visibility.append("!").append(numBlackListed);
543            visibility.append("]");
544        } else {
545            if (mRssi != Integer.MAX_VALUE) {
546                visibility.append(" rssi=");
547                visibility.append(mRssi);
548                if (mScanResult != null) {
549                    visibility.append(", f=");
550                    visibility.append(mScanResult.frequency);
551                }
552            }
553        }
554
555        return visibility.toString();
556    }
557
558    /**
559     * Return whether this is the active connection.
560     * For ephemeral connections (networkId is invalid), this returns false if the network is
561     * disconnected.
562     */
563    public boolean isActive() {
564        return mNetworkInfo != null &&
565                (networkId != WifiConfiguration.INVALID_NETWORK_ID ||
566                 mNetworkInfo.getState() != State.DISCONNECTED);
567    }
568
569    public boolean isConnectable() {
570        return getLevel() != -1 && getDetailedState() == null;
571    }
572
573    public boolean isEphemeral() {
574        return !isSaved() && mNetworkInfo != null && mNetworkInfo.getState() != State.DISCONNECTED;
575    }
576
577    /** Return whether the given {@link WifiInfo} is for this access point. */
578    private boolean isInfoForThisAccessPoint(WifiInfo info) {
579        if (networkId != WifiConfiguration.INVALID_NETWORK_ID) {
580            return networkId == info.getNetworkId();
581        } else {
582            // Might be an ephemeral connection with no WifiConfiguration. Try matching on SSID.
583            // (Note that we only do this if the WifiConfiguration explicitly equals INVALID).
584            // TODO: Handle hex string SSIDs.
585            return ssid.equals(removeDoubleQuotes(info.getSSID()));
586        }
587    }
588
589    public boolean isSaved() {
590        return networkId != WifiConfiguration.INVALID_NETWORK_ID;
591    }
592
593    public Object getTag() {
594        return mTag;
595    }
596
597    public void setTag(Object tag) {
598        mTag = tag;
599    }
600
601    /**
602     * Generate and save a default wifiConfiguration with common values.
603     * Can only be called for unsecured networks.
604     */
605    public void generateOpenNetworkConfig() {
606        if (security != SECURITY_NONE)
607            throw new IllegalStateException();
608        if (mConfig != null)
609            return;
610        mConfig = new WifiConfiguration();
611        mConfig.SSID = AccessPoint.convertToQuotedString(ssid);
612        mConfig.allowedKeyManagement.set(KeyMgmt.NONE);
613    }
614
615    void loadConfig(WifiConfiguration config) {
616        if (config.isPasspoint())
617            ssid = config.providerFriendlyName;
618        else
619            ssid = (config.SSID == null ? "" : removeDoubleQuotes(config.SSID));
620
621        security = getSecurity(config);
622        networkId = config.networkId;
623        mConfig = config;
624    }
625
626    private void loadResult(ScanResult result) {
627        ssid = result.SSID;
628        security = getSecurity(result);
629        if (security == SECURITY_PSK)
630            pskType = getPskType(result);
631        mRssi = result.level;
632        mScanResult = result;
633        if (result.seen > mSeen) {
634            mSeen = result.seen;
635        }
636    }
637
638    public void saveWifiState(Bundle savedState) {
639        savedState.putParcelable(KEY_CONFIG, mConfig);
640        savedState.putParcelable(KEY_SCANRESULT, mScanResult);
641        savedState.putParcelable(KEY_WIFIINFO, mInfo);
642        if (mNetworkInfo != null) {
643            savedState.putParcelable(KEY_NETWORKINFO, mNetworkInfo);
644        }
645    }
646
647    public void setListener(AccessPointListener listener) {
648        mAccessPointListener = listener;
649    }
650
651    boolean update(ScanResult result) {
652        if (result.seen > mSeen) {
653            mSeen = result.seen;
654        }
655        if (WifiTracker.sVerboseLogging > 0) {
656            if (mScanResultCache == null) {
657                mScanResultCache = new LruCache<String, ScanResult>(32);
658            }
659            mScanResultCache.put(result.BSSID, result);
660        }
661
662        if (ssid.equals(result.SSID) && security == getSecurity(result)) {
663            if (WifiManager.compareSignalLevel(result.level, mRssi) > 0) {
664                int oldLevel = getLevel();
665                mRssi = result.level;
666                if (getLevel() != oldLevel && mAccessPointListener != null) {
667                    mAccessPointListener.onLevelChanged(this);
668                }
669            }
670            // This flag only comes from scans, is not easily saved in config
671            if (security == SECURITY_PSK) {
672                pskType = getPskType(result);
673            }
674            mScanResult = result;
675            if (mAccessPointListener != null) {
676                mAccessPointListener.onAccessPointChanged(this);
677            }
678            return true;
679        }
680        return false;
681    }
682
683    boolean update(WifiInfo info, NetworkInfo networkInfo) {
684        boolean reorder = false;
685        if (info != null && isInfoForThisAccessPoint(info)) {
686            reorder = (mInfo == null);
687            mRssi = info.getRssi();
688            mInfo = info;
689            mNetworkInfo = networkInfo;
690            if (mAccessPointListener != null) {
691                mAccessPointListener.onAccessPointChanged(this);
692            }
693        } else if (mInfo != null) {
694            reorder = true;
695            mInfo = null;
696            mNetworkInfo = null;
697            if (mAccessPointListener != null) {
698                mAccessPointListener.onAccessPointChanged(this);
699            }
700        }
701        return reorder;
702    }
703
704    void update(WifiConfiguration config) {
705        mConfig = config;
706        networkId = config.networkId;
707        if (mAccessPointListener != null) {
708            mAccessPointListener.onAccessPointChanged(this);
709        }
710    }
711
712    public static String getSummary(Context context, String ssid, DetailedState state,
713            boolean isEphemeral, String passpointProvider) {
714        if (state == DetailedState.CONNECTED && ssid == null) {
715            if (TextUtils.isEmpty(passpointProvider) == false) {
716                // Special case for connected + passpoint networks.
717                String format = context.getString(R.string.connected_via_passpoint);
718                return String.format(format, passpointProvider);
719            } else if (isEphemeral) {
720                // Special case for connected + ephemeral networks.
721                return context.getString(R.string.connected_via_wfa);
722            }
723        }
724
725        String[] formats = context.getResources().getStringArray((ssid == null)
726                ? R.array.wifi_status : R.array.wifi_status_with_ssid);
727        int index = state.ordinal();
728
729        if (index >= formats.length || formats[index].length() == 0) {
730            return null;
731        }
732        return String.format(formats[index], ssid);
733    }
734
735    public static String getSummary(Context context, DetailedState state, boolean isEphemeral) {
736        return getSummary(context, null, state, isEphemeral, null);
737    }
738
739    public static String getSummary(Context context, DetailedState state, boolean isEphemeral,
740            String passpointProvider) {
741        return getSummary(context, null, state, isEphemeral, passpointProvider);
742    }
743
744    public static String convertToQuotedString(String string) {
745        return "\"" + string + "\"";
746    }
747
748    private static int getPskType(ScanResult result) {
749        boolean wpa = result.capabilities.contains("WPA-PSK");
750        boolean wpa2 = result.capabilities.contains("WPA2-PSK");
751        if (wpa2 && wpa) {
752            return PSK_WPA_WPA2;
753        } else if (wpa2) {
754            return PSK_WPA2;
755        } else if (wpa) {
756            return PSK_WPA;
757        } else {
758            Log.w(TAG, "Received abnormal flag string: " + result.capabilities);
759            return PSK_UNKNOWN;
760        }
761    }
762
763    private static int getSecurity(ScanResult result) {
764        if (result.capabilities.contains("WEP")) {
765            return SECURITY_WEP;
766        } else if (result.capabilities.contains("PSK")) {
767            return SECURITY_PSK;
768        } else if (result.capabilities.contains("EAP")) {
769            return SECURITY_EAP;
770        }
771        return SECURITY_NONE;
772    }
773
774    static int getSecurity(WifiConfiguration config) {
775        if (config.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
776            return SECURITY_PSK;
777        }
778        if (config.allowedKeyManagement.get(KeyMgmt.WPA_EAP) ||
779                config.allowedKeyManagement.get(KeyMgmt.IEEE8021X)) {
780            return SECURITY_EAP;
781        }
782        return (config.wepKeys[0] != null) ? SECURITY_WEP : SECURITY_NONE;
783    }
784
785    public static String securityToString(int security, int pskType) {
786        if (security == SECURITY_WEP) {
787            return "WEP";
788        } else if (security == SECURITY_PSK) {
789            if (pskType == PSK_WPA) {
790                return "WPA";
791            } else if (pskType == PSK_WPA2) {
792                return "WPA2";
793            } else if (pskType == PSK_WPA_WPA2) {
794                return "WPA_WPA2";
795            }
796            return "PSK";
797        } else if (security == SECURITY_EAP) {
798            return "EAP";
799        }
800        return "NONE";
801    }
802
803    static String removeDoubleQuotes(String string) {
804        int length = string.length();
805        if ((length > 1) && (string.charAt(0) == '"')
806                && (string.charAt(length - 1) == '"')) {
807            return string.substring(1, length - 1);
808        }
809        return string;
810    }
811
812    public interface AccessPointListener {
813        void onAccessPointChanged(AccessPoint accessPoint);
814        void onLevelChanged(AccessPoint accessPoint);
815    }
816}
817