AccessPoint.java revision 6980d12c5864941e68933705c1f15a102ac348cb 
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.app.AppGlobals;
20import android.content.Context;
21import android.content.pm.ApplicationInfo;
22import android.content.pm.IPackageManager;
23import android.content.pm.PackageManager;
24import android.net.ConnectivityManager;
25import android.net.Network;
26import android.net.NetworkCapabilities;
27import android.net.NetworkInfo;
28import android.net.NetworkInfo.DetailedState;
29import android.net.NetworkInfo.State;
30import android.net.wifi.IWifiManager;
31import android.net.wifi.ScanResult;
32import android.net.wifi.WifiConfiguration;
33import android.net.wifi.WifiConfiguration.KeyMgmt;
34import android.net.wifi.WifiInfo;
35import android.net.wifi.WifiManager;
36import android.os.Bundle;
37import android.os.RemoteException;
38import android.os.ServiceManager;
39import android.os.UserHandle;
40import android.text.Spannable;
41import android.text.SpannableString;
42import android.text.TextUtils;
43import android.text.style.TtsSpan;
44import android.util.Log;
45import android.util.LruCache;
46
47import com.android.settingslib.R;
48
49import java.util.Map;
50
51
52public class AccessPoint implements Comparable<AccessPoint> {
53    static final String TAG = "SettingsLib.AccessPoint";
54
55    /**
56     * Lower bound on the 2.4 GHz (802.11b/g/n) WLAN channels
57     */
58    public static final int LOWER_FREQ_24GHZ = 2400;
59
60    /**
61     * Upper bound on the 2.4 GHz (802.11b/g/n) WLAN channels
62     */
63    public static final int HIGHER_FREQ_24GHZ = 2500;
64
65    /**
66     * Lower bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
67     */
68    public static final int LOWER_FREQ_5GHZ = 4900;
69
70    /**
71     * Upper bound on the 5.0 GHz (802.11a/h/j/n/ac) WLAN channels
72     */
73    public static final int HIGHER_FREQ_5GHZ = 5900;
74
75
76    /**
77     * Experimental: we should be able to show the user the list of BSSIDs and bands
78     *  for that SSID.
79     *  For now this data is used only with Verbose Logging so as to show the band and number
80     *  of BSSIDs on which that network is seen.
81     */
82    public LruCache<String, ScanResult> mScanResultCache;
83    private static final String KEY_NETWORKINFO = "key_networkinfo";
84    private static final String KEY_WIFIINFO = "key_wifiinfo";
85    private static final String KEY_SCANRESULT = "key_scanresult";
86    private static final String KEY_CONFIG = "key_config";
87
88    /**
89     * These values are matched in string arrays -- changes must be kept in sync
90     */
91    public static final int SECURITY_NONE = 0;
92    public static final int SECURITY_WEP = 1;
93    public static final int SECURITY_PSK = 2;
94    public static final int SECURITY_EAP = 3;
95
96    private static final int PSK_UNKNOWN = 0;
97    private static final int PSK_WPA = 1;
98    private static final int PSK_WPA2 = 2;
99    private static final int PSK_WPA_WPA2 = 3;
100
101    private static final int VISIBILITY_OUTDATED_AGE_IN_MILLI = 20000;
102    private final Context mContext;
103
104    private String ssid;
105    private int security;
106    private int networkId = WifiConfiguration.INVALID_NETWORK_ID;
107
108    private int pskType = PSK_UNKNOWN;
109
110    private WifiConfiguration mConfig;
111    private ScanResult mScanResult;
112
113    private int mRssi = Integer.MAX_VALUE;
114    private long mSeen = 0;
115
116    private WifiInfo mInfo;
117    private NetworkInfo mNetworkInfo;
118    private AccessPointListener mAccessPointListener;
119
120    private Object mTag;
121
122    public AccessPoint(Context context, Bundle savedState) {
123        mContext = context;
124        mConfig = savedState.getParcelable(KEY_CONFIG);
125        if (mConfig != null) {
126            loadConfig(mConfig);
127        }
128        mScanResult = (ScanResult) savedState.getParcelable(KEY_SCANRESULT);
129        if (mScanResult != null) {
130            loadResult(mScanResult);
131        }
132        mInfo = (WifiInfo) savedState.getParcelable(KEY_WIFIINFO);
133        if (savedState.containsKey(KEY_NETWORKINFO)) {
134            mNetworkInfo = savedState.getParcelable(KEY_NETWORKINFO);
135        }
136        update(mInfo, mNetworkInfo);
137    }
138
139    AccessPoint(Context context, ScanResult result) {
140        mContext = context;
141        loadResult(result);
142    }
143
144    AccessPoint(Context context, WifiConfiguration config) {
145        mContext = context;
146        loadConfig(config);
147    }
148
149    @Override
150    public int compareTo(AccessPoint other) {
151        // Active one goes first.
152        if (isActive() && !other.isActive()) return -1;
153        if (!isActive() && other.isActive()) return 1;
154
155        // Reachable one goes before unreachable one.
156        if (mRssi != Integer.MAX_VALUE && other.mRssi == Integer.MAX_VALUE) return -1;
157        if (mRssi == Integer.MAX_VALUE && other.mRssi != Integer.MAX_VALUE) return 1;
158
159        // Configured one goes before unconfigured one.
160        if (networkId != WifiConfiguration.INVALID_NETWORK_ID
161                && other.networkId == WifiConfiguration.INVALID_NETWORK_ID) return -1;
162        if (networkId == WifiConfiguration.INVALID_NETWORK_ID
163                && other.networkId != WifiConfiguration.INVALID_NETWORK_ID) return 1;
164
165        // Sort by signal strength.
166        int difference = WifiManager.compareSignalLevel(other.mRssi, mRssi);
167        if (difference != 0) {
168            return difference;
169        }
170        // Sort by ssid.
171        return ssid.compareToIgnoreCase(other.ssid);
172    }
173
174    @Override
175    public boolean equals(Object other) {
176        if (!(other instanceof AccessPoint)) return false;
177        return (this.compareTo((AccessPoint) other) == 0);
178    }
179
180    @Override
181    public int hashCode() {
182        int result = 0;
183        if (mInfo != null) result += 13 * mInfo.hashCode();
184        result += 19 * mRssi;
185        result += 23 * networkId;
186        result += 29 * ssid.hashCode();
187        return result;
188    }
189
190    @Override
191    public String toString() {
192        StringBuilder builder = new StringBuilder().append("AccessPoint(")
193                .append(ssid);
194        if (isSaved()) {
195            builder.append(',').append("saved");
196        }
197        if (isActive()) {
198            builder.append(',').append("active");
199        }
200        if (isEphemeral()) {
201            builder.append(',').append("ephemeral");
202        }
203        if (isConnectable()) {
204            builder.append(',').append("connectable");
205        }
206        if (security != SECURITY_NONE) {
207            builder.append(',').append(securityToString(security, pskType));
208        }
209        return builder.append(')').toString();
210    }
211
212    public boolean matches(ScanResult result) {
213        return ssid.equals(result.SSID) && security == getSecurity(result);
214    }
215
216    public boolean matches(WifiConfiguration config) {
217        if (config.isPasspoint() && mConfig != null && mConfig.isPasspoint())
218            return config.FQDN.equals(mConfig.providerFriendlyName);
219        else
220            return ssid.equals(removeDoubleQuotes(config.SSID)) && security == getSecurity(config);
221    }
222
223    public WifiConfiguration getConfig() {
224        return mConfig;
225    }
226
227    public void clearConfig() {
228        mConfig = null;
229        networkId = WifiConfiguration.INVALID_NETWORK_ID;
230    }
231
232    public WifiInfo getInfo() {
233        return mInfo;
234    }
235
236    public int getLevel() {
237        if (mRssi == Integer.MAX_VALUE) {
238            return -1;
239        }
240        return WifiManager.calculateSignalLevel(mRssi, 4);
241    }
242
243    public NetworkInfo getNetworkInfo() {
244        return mNetworkInfo;
245    }
246
247    public int getSecurity() {
248        return security;
249    }
250
251    public String getSecurityString(boolean concise) {
252        Context context = mContext;
253        if (mConfig != null && mConfig.isPasspoint()) {
254            return context.getString(R.string.wifi_security_passpoint);
255        }
256        switch(security) {
257            case SECURITY_EAP:
258                return concise ? context.getString(R.string.wifi_security_short_eap) :
259                    context.getString(R.string.wifi_security_eap);
260            case SECURITY_PSK:
261                switch (pskType) {
262                    case PSK_WPA:
263                        return concise ? context.getString(R.string.wifi_security_short_wpa) :
264                            context.getString(R.string.wifi_security_wpa);
265                    case PSK_WPA2:
266                        return concise ? context.getString(R.string.wifi_security_short_wpa2) :
267                            context.getString(R.string.wifi_security_wpa2);
268                    case PSK_WPA_WPA2:
269                        return concise ? context.getString(R.string.wifi_security_short_wpa_wpa2) :
270                            context.getString(R.string.wifi_security_wpa_wpa2);
271                    case PSK_UNKNOWN:
272                    default:
273                        return concise ? context.getString(R.string.wifi_security_short_psk_generic)
274                                : context.getString(R.string.wifi_security_psk_generic);
275                }
276            case SECURITY_WEP:
277                return concise ? context.getString(R.string.wifi_security_short_wep) :
278                    context.getString(R.string.wifi_security_wep);
279            case SECURITY_NONE:
280            default:
281                return concise ? "" : context.getString(R.string.wifi_security_none);
282        }
283    }
284
285    public String getSsidStr() {
286        return ssid;
287    }
288
289    public CharSequence getSsid() {
290        SpannableString str = new SpannableString(ssid);
291        str.setSpan(new TtsSpan.VerbatimBuilder(ssid).build(), 0, ssid.length(),
292                Spannable.SPAN_INCLUSIVE_INCLUSIVE);
293        return str;
294    }
295
296    public String getConfigName() {
297        if (mConfig != null && mConfig.isPasspoint()) {
298            return mConfig.providerFriendlyName;
299        } else {
300            return ssid;
301        }
302    }
303
304    public DetailedState getDetailedState() {
305        return mNetworkInfo != null ? mNetworkInfo.getDetailedState() : null;
306    }
307
308    public String getSavedNetworkSummary() {
309        if (mConfig != null) {
310            PackageManager pm = mContext.getPackageManager();
311            String systemName = pm.getNameForUid(android.os.Process.SYSTEM_UID);
312            int userId = UserHandle.getUserId(mConfig.creatorUid);
313            ApplicationInfo appInfo = null;
314            if (mConfig.creatorName != null && mConfig.creatorName.equals(systemName)) {
315                appInfo = mContext.getApplicationInfo();
316            } else {
317                try {
318                    IPackageManager ipm = AppGlobals.getPackageManager();
319                    appInfo = ipm.getApplicationInfo(mConfig.creatorName, 0 /* flags */, userId);
320                } catch (RemoteException rex) {
321                }
322            }
323            if (appInfo != null &&
324                    !appInfo.packageName.equals(mContext.getString(R.string.settings_package)) &&
325                    !appInfo.packageName.equals(
326                    mContext.getString(R.string.certinstaller_package))) {
327                return mContext.getString(R.string.saved_network, appInfo.loadLabel(pm));
328            }
329        }
330        return "";
331    }
332
333    public String getSummary() {
334        return getSettingsSummary();
335    }
336
337    public String getSettingsSummary() {
338        // Update to new summary
339        StringBuilder summary = new StringBuilder();
340
341        if (isActive() && mConfig != null && mConfig.isPasspoint()) {
342            // This is the active connection on passpoint
343            summary.append(getSummary(mContext, getDetailedState(),
344                    false, mConfig.providerFriendlyName));
345        } else if (isActive()) {
346            // This is the active connection on non-passpoint network
347            summary.append(getSummary(mContext, getDetailedState(),
348                    networkId == WifiConfiguration.INVALID_NETWORK_ID));
349        } else if (mConfig != null && mConfig.isPasspoint()) {
350            String format = mContext.getString(R.string.available_via_passpoint);
351            summary.append(String.format(format, mConfig.providerFriendlyName));
352        } else if (mConfig != null && mConfig.hasNoInternetAccess()) {
353            summary.append(mContext.getString(R.string.wifi_no_internet));
354        } else if (mConfig != null && ((mConfig.status == WifiConfiguration.Status.DISABLED &&
355                mConfig.disableReason != WifiConfiguration.DISABLED_UNKNOWN_REASON)
356               || mConfig.autoJoinStatus
357                >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE)) {
358            if (mConfig.autoJoinStatus
359                    >= WifiConfiguration.AUTO_JOIN_DISABLED_ON_AUTH_FAILURE) {
360                if (mConfig.disableReason == WifiConfiguration.DISABLED_DHCP_FAILURE) {
361                    summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
362                } else if (mConfig.disableReason == WifiConfiguration.DISABLED_AUTH_FAILURE) {
363                    summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
364                } else {
365                    summary.append(mContext.getString(R.string.wifi_disabled_wifi_failure));
366                }
367            } else {
368                switch (mConfig.disableReason) {
369                    case WifiConfiguration.DISABLED_AUTH_FAILURE:
370                        summary.append(mContext.getString(R.string.wifi_disabled_password_failure));
371                        break;
372                    case WifiConfiguration.DISABLED_DHCP_FAILURE:
373                    case WifiConfiguration.DISABLED_DNS_FAILURE:
374                        summary.append(mContext.getString(R.string.wifi_disabled_network_failure));
375                        break;
376                    case WifiConfiguration.DISABLED_UNKNOWN_REASON:
377                    case WifiConfiguration.DISABLED_ASSOCIATION_REJECT:
378                        summary.append(mContext.getString(R.string.wifi_disabled_generic));
379                        break;
380                }
381            }
382        } else if (mRssi == Integer.MAX_VALUE) { // Wifi out of range
383            summary.append(mContext.getString(R.string.wifi_not_in_range));
384        } else { // In range, not disabled.
385            if (mConfig != null) { // Is saved network
386                summary.append(mContext.getString(R.string.wifi_remembered));
387            }
388        }
389
390        if (WifiTracker.sVerboseLogging > 0) {
391            // Add RSSI/band information for this config, what was seen up to 6 seconds ago
392            // verbose WiFi Logging is only turned on thru developers settings
393            if (mInfo != null && mNetworkInfo != null) { // This is the active connection
394                summary.append(" f=" + Integer.toString(mInfo.getFrequency()));
395            }
396            summary.append(" " + getVisibilityStatus());
397            if (mConfig != null && mConfig.autoJoinStatus > 0) {
398                summary.append(" (" + mConfig.autoJoinStatus);
399                if (mConfig.blackListTimestamp > 0) {
400                    long now = System.currentTimeMillis();
401                    long diff = (now - mConfig.blackListTimestamp)/1000;
402                    long sec = diff%60; //seconds
403                    long min = (diff/60)%60; //minutes
404                    long hour = (min/60)%60; //hours
405                    summary.append(", ");
406                    if (hour > 0) summary.append(Long.toString(hour) + "h ");
407                    summary.append( Long.toString(min) + "m ");
408                    summary.append( Long.toString(sec) + "s ");
409                }
410                summary.append(")");
411            }
412            if (mConfig != null && mConfig.numIpConfigFailures > 0) {
413                summary.append(" ipf=").append(mConfig.numIpConfigFailures);
414            }
415            if (mConfig != null && mConfig.numConnectionFailures > 0) {
416                summary.append(" cf=").append(mConfig.numConnectionFailures);
417            }
418            if (mConfig != null && mConfig.numAuthFailures > 0) {
419                summary.append(" authf=").append(mConfig.numAuthFailures);
420            }
421            if (mConfig != null && mConfig.numNoInternetAccessReports > 0) {
422                summary.append(" noInt=").append(mConfig.numNoInternetAccessReports);
423            }
424        }
425        return summary.toString();
426    }
427
428    /**
429     * Returns the visibility status of the WifiConfiguration.
430     *
431     * @return autojoin debugging information
432     * TODO: use a string formatter
433     * ["rssi 5Ghz", "num results on 5GHz" / "rssi 5Ghz", "num results on 5GHz"]
434     * For instance [-40,5/-30,2]
435     */
436    private String getVisibilityStatus() {
437        StringBuilder visibility = new StringBuilder();
438        StringBuilder scans24GHz = null;
439        StringBuilder scans5GHz = null;
440        String bssid = null;
441
442        long now = System.currentTimeMillis();
443
444        if (mInfo != null) {
445            bssid = mInfo.getBSSID();
446            if (bssid != null) {
447                visibility.append(" ").append(bssid);
448            }
449            visibility.append(" rssi=").append(mInfo.getRssi());
450            visibility.append(" ");
451            visibility.append(" score=").append(mInfo.score);
452            visibility.append(String.format(" tx=%.1f,", mInfo.txSuccessRate));
453            visibility.append(String.format("%.1f,", mInfo.txRetriesRate));
454            visibility.append(String.format("%.1f ", mInfo.txBadRate));
455            visibility.append(String.format("rx=%.1f", mInfo.rxSuccessRate));
456        }
457
458        if (mScanResultCache != null) {
459            int rssi5 = WifiConfiguration.INVALID_RSSI;
460            int rssi24 = WifiConfiguration.INVALID_RSSI;
461            int num5 = 0;
462            int num24 = 0;
463            int numBlackListed = 0;
464            int n24 = 0; // Number scan results we included in the string
465            int n5 = 0; // Number scan results we included in the string
466            Map<String, ScanResult> list = mScanResultCache.snapshot();
467            // TODO: sort list by RSSI or age
468            for (ScanResult result : list.values()) {
469                if (result.seen == 0)
470                    continue;
471
472                if (result.autoJoinStatus != ScanResult.ENABLED) numBlackListed++;
473
474                if (result.frequency >= LOWER_FREQ_5GHZ
475                        && result.frequency <= HIGHER_FREQ_5GHZ) {
476                    // Strictly speaking: [4915, 5825]
477                    // number of known BSSID on 5GHz band
478                    num5 = num5 + 1;
479                } else if (result.frequency >= LOWER_FREQ_24GHZ
480                        && result.frequency <= HIGHER_FREQ_24GHZ) {
481                    // Strictly speaking: [2412, 2482]
482                    // number of known BSSID on 2.4Ghz band
483                    num24 = num24 + 1;
484                }
485
486                // Ignore results seen, older than 20 seconds
487                if (now - result.seen > VISIBILITY_OUTDATED_AGE_IN_MILLI) continue;
488
489                if (result.frequency >= LOWER_FREQ_5GHZ
490                        && result.frequency <= HIGHER_FREQ_5GHZ) {
491                    if (result.level > rssi5) {
492                        rssi5 = result.level;
493                    }
494                    if (n5 < 4) {
495                        if (scans5GHz == null) scans5GHz = new StringBuilder();
496                        scans5GHz.append(" \n{").append(result.BSSID);
497                        if (bssid != null && result.BSSID.equals(bssid)) scans5GHz.append("*");
498                        scans5GHz.append("=").append(result.frequency);
499                        scans5GHz.append(",").append(result.level);
500                        if (result.autoJoinStatus != 0) {
501                            scans5GHz.append(",st=").append(result.autoJoinStatus);
502                        }
503                        if (result.numIpConfigFailures != 0) {
504                            scans5GHz.append(",ipf=").append(result.numIpConfigFailures);
505                        }
506                        scans5GHz.append("}");
507                        n5++;
508                    }
509                } else if (result.frequency >= LOWER_FREQ_24GHZ
510                        && result.frequency <= HIGHER_FREQ_24GHZ) {
511                    if (result.level > rssi24) {
512                        rssi24 = result.level;
513                    }
514                    if (n24 < 4) {
515                        if (scans24GHz == null) scans24GHz = new StringBuilder();
516                        scans24GHz.append(" \n{").append(result.BSSID);
517                        if (bssid != null && result.BSSID.equals(bssid)) scans24GHz.append("*");
518                        scans24GHz.append("=").append(result.frequency);
519                        scans24GHz.append(",").append(result.level);
520                        if (result.autoJoinStatus != 0) {
521                            scans24GHz.append(",st=").append(result.autoJoinStatus);
522                        }
523                        if (result.numIpConfigFailures != 0) {
524                            scans24GHz.append(",ipf=").append(result.numIpConfigFailures);
525                        }
526                        scans24GHz.append("}");
527                        n24++;
528                    }
529                }
530            }
531            visibility.append(" [");
532            if (num24 > 0) {
533                visibility.append("(").append(num24).append(")");
534                if (n24 <= 4) {
535                    if (scans24GHz != null) {
536                        visibility.append(scans24GHz.toString());
537                    }
538                } else {
539                    visibility.append("max=").append(rssi24);
540                    if (scans24GHz != null) {
541                        visibility.append(",").append(scans24GHz.toString());
542                    }
543                }
544            }
545            visibility.append(";");
546            if (num5 > 0) {
547                visibility.append("(").append(num5).append(")");
548                if (n5 <= 4) {
549                    if (scans5GHz != null) {
550                        visibility.append(scans5GHz.toString());
551                    }
552                } else {
553                    visibility.append("max=").append(rssi5);
554                    if (scans5GHz != null) {
555                        visibility.append(",").append(scans5GHz.toString());
556                    }
557                }
558            }
559            if (numBlackListed > 0)
560                visibility.append("!").append(numBlackListed);
561            visibility.append("]");
562        } else {
563            if (mRssi != Integer.MAX_VALUE) {
564                visibility.append(" rssi=");
565                visibility.append(mRssi);
566                if (mScanResult != null) {
567                    visibility.append(", f=");
568                    visibility.append(mScanResult.frequency);
569                }
570            }
571        }
572
573        return visibility.toString();
574    }
575
576    /**
577     * Return whether this is the active connection.
578     * For ephemeral connections (networkId is invalid), this returns false if the network is
579     * disconnected.
580     */
581    public boolean isActive() {
582        return mNetworkInfo != null &&
583                (networkId != WifiConfiguration.INVALID_NETWORK_ID ||
584                 mNetworkInfo.getState() != State.DISCONNECTED);
585    }
586
587    public boolean isConnectable() {
588        return getLevel() != -1 && getDetailedState() == null;
589    }
590
591    public boolean isEphemeral() {
592        return !isSaved() && mNetworkInfo != null && mNetworkInfo.getState() != State.DISCONNECTED;
593    }
594
595    /** Return whether the given {@link WifiInfo} is for this access point. */
596    private boolean isInfoForThisAccessPoint(WifiInfo info) {
597        if (networkId != WifiConfiguration.INVALID_NETWORK_ID) {
598            return networkId == info.getNetworkId();
599        } else {
600            // Might be an ephemeral connection with no WifiConfiguration. Try matching on SSID.
601            // (Note that we only do this if the WifiConfiguration explicitly equals INVALID).
602            // TODO: Handle hex string SSIDs.
603            return ssid.equals(removeDoubleQuotes(info.getSSID()));
604        }
605    }
606
607    public boolean isSaved() {
608        return networkId != WifiConfiguration.INVALID_NETWORK_ID;
609    }
610
611    public Object getTag() {
612        return mTag;
613    }
614
615    public void setTag(Object tag) {
616        mTag = tag;
617    }
618
619    /**
620     * Generate and save a default wifiConfiguration with common values.
621     * Can only be called for unsecured networks.
622     */
623    public void generateOpenNetworkConfig() {
624        if (security != SECURITY_NONE)
625            throw new IllegalStateException();
626        if (mConfig != null)
627            return;
628        mConfig = new WifiConfiguration();
629        mConfig.SSID = AccessPoint.convertToQuotedString(ssid);
630        mConfig.allowedKeyManagement.set(KeyMgmt.NONE);
631    }
632
633    void loadConfig(WifiConfiguration config) {
634        if (config.isPasspoint())
635            ssid = config.providerFriendlyName;
636        else
637            ssid = (config.SSID == null ? "" : removeDoubleQuotes(config.SSID));
638
639        security = getSecurity(config);
640        networkId = config.networkId;
641        mConfig = config;
642    }
643
644    private void loadResult(ScanResult result) {
645        ssid = result.SSID;
646        security = getSecurity(result);
647        if (security == SECURITY_PSK)
648            pskType = getPskType(result);
649        mRssi = result.level;
650        mScanResult = result;
651        if (result.seen > mSeen) {
652            mSeen = result.seen;
653        }
654    }
655
656    public void saveWifiState(Bundle savedState) {
657        savedState.putParcelable(KEY_CONFIG, mConfig);
658        savedState.putParcelable(KEY_SCANRESULT, mScanResult);
659        savedState.putParcelable(KEY_WIFIINFO, mInfo);
660        if (mNetworkInfo != null) {
661            savedState.putParcelable(KEY_NETWORKINFO, mNetworkInfo);
662        }
663    }
664
665    public void setListener(AccessPointListener listener) {
666        mAccessPointListener = listener;
667    }
668
669    boolean update(ScanResult result) {
670        if (result.seen > mSeen) {
671            mSeen = result.seen;
672        }
673        if (WifiTracker.sVerboseLogging > 0) {
674            if (mScanResultCache == null) {
675                mScanResultCache = new LruCache<String, ScanResult>(32);
676            }
677            mScanResultCache.put(result.BSSID, result);
678        }
679
680        if (ssid.equals(result.SSID) && security == getSecurity(result)) {
681            if (WifiManager.compareSignalLevel(result.level, mRssi) > 0) {
682                int oldLevel = getLevel();
683                mRssi = result.level;
684                if (getLevel() != oldLevel && mAccessPointListener != null) {
685                    mAccessPointListener.onLevelChanged(this);
686                }
687            }
688            // This flag only comes from scans, is not easily saved in config
689            if (security == SECURITY_PSK) {
690                pskType = getPskType(result);
691            }
692            mScanResult = result;
693            if (mAccessPointListener != null) {
694                mAccessPointListener.onAccessPointChanged(this);
695            }
696            return true;
697        }
698        return false;
699    }
700
701    boolean update(WifiInfo info, NetworkInfo networkInfo) {
702        boolean reorder = false;
703        if (info != null && isInfoForThisAccessPoint(info)) {
704            reorder = (mInfo == null);
705            mRssi = info.getRssi();
706            mInfo = info;
707            mNetworkInfo = networkInfo;
708            if (mAccessPointListener != null) {
709                mAccessPointListener.onAccessPointChanged(this);
710            }
711        } else if (mInfo != null) {
712            reorder = true;
713            mInfo = null;
714            mNetworkInfo = null;
715            if (mAccessPointListener != null) {
716                mAccessPointListener.onAccessPointChanged(this);
717            }
718        }
719        return reorder;
720    }
721
722    void update(WifiConfiguration config) {
723        mConfig = config;
724        networkId = config.networkId;
725        if (mAccessPointListener != null) {
726            mAccessPointListener.onAccessPointChanged(this);
727        }
728    }
729
730    public static String getSummary(Context context, String ssid, DetailedState state,
731            boolean isEphemeral, String passpointProvider) {
732        if (state == DetailedState.CONNECTED && ssid == null) {
733            if (TextUtils.isEmpty(passpointProvider) == false) {
734                // Special case for connected + passpoint networks.
735                String format = context.getString(R.string.connected_via_passpoint);
736                return String.format(format, passpointProvider);
737            } else if (isEphemeral) {
738                // Special case for connected + ephemeral networks.
739                return context.getString(R.string.connected_via_wfa);
740            }
741        }
742
743        // Case when there is wifi connected without internet connectivity.
744        final ConnectivityManager cm = (ConnectivityManager)
745                context.getSystemService(Context.CONNECTIVITY_SERVICE);
746        if (state == DetailedState.CONNECTED) {
747            IWifiManager wifiManager = IWifiManager.Stub.asInterface(
748                    ServiceManager.getService(Context.WIFI_SERVICE));
749            Network nw;
750
751            try {
752                nw = wifiManager.getCurrentNetwork();
753            } catch (RemoteException e) {
754                nw = null;
755            }
756            NetworkCapabilities nc = cm.getNetworkCapabilities(nw);
757            if (nc != null && !nc.hasCapability(nc.NET_CAPABILITY_VALIDATED)) {
758                return context.getString(R.string.wifi_connected_no_internet);
759            }
760        }
761
762        String[] formats = context.getResources().getStringArray((ssid == null)
763                ? R.array.wifi_status : R.array.wifi_status_with_ssid);
764        int index = state.ordinal();
765
766        if (index >= formats.length || formats[index].length() == 0) {
767            return "";
768        }
769        return String.format(formats[index], ssid);
770    }
771
772    public static String getSummary(Context context, DetailedState state, boolean isEphemeral) {
773        return getSummary(context, null, state, isEphemeral, null);
774    }
775
776    public static String getSummary(Context context, DetailedState state, boolean isEphemeral,
777            String passpointProvider) {
778        return getSummary(context, null, state, isEphemeral, passpointProvider);
779    }
780
781    public static String convertToQuotedString(String string) {
782        return "\"" + string + "\"";
783    }
784
785    private static int getPskType(ScanResult result) {
786        boolean wpa = result.capabilities.contains("WPA-PSK");
787        boolean wpa2 = result.capabilities.contains("WPA2-PSK");
788        if (wpa2 && wpa) {
789            return PSK_WPA_WPA2;
790        } else if (wpa2) {
791            return PSK_WPA2;
792        } else if (wpa) {
793            return PSK_WPA;
794        } else {
795            Log.w(TAG, "Received abnormal flag string: " + result.capabilities);
796            return PSK_UNKNOWN;
797        }
798    }
799
800    private static int getSecurity(ScanResult result) {
801        if (result.capabilities.contains("WEP")) {
802            return SECURITY_WEP;
803        } else if (result.capabilities.contains("PSK")) {
804            return SECURITY_PSK;
805        } else if (result.capabilities.contains("EAP")) {
806            return SECURITY_EAP;
807        }
808        return SECURITY_NONE;
809    }
810
811    static int getSecurity(WifiConfiguration config) {
812        if (config.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
813            return SECURITY_PSK;
814        }
815        if (config.allowedKeyManagement.get(KeyMgmt.WPA_EAP) ||
816                config.allowedKeyManagement.get(KeyMgmt.IEEE8021X)) {
817            return SECURITY_EAP;
818        }
819        return (config.wepKeys[0] != null) ? SECURITY_WEP : SECURITY_NONE;
820    }
821
822    public static String securityToString(int security, int pskType) {
823        if (security == SECURITY_WEP) {
824            return "WEP";
825        } else if (security == SECURITY_PSK) {
826            if (pskType == PSK_WPA) {
827                return "WPA";
828            } else if (pskType == PSK_WPA2) {
829                return "WPA2";
830            } else if (pskType == PSK_WPA_WPA2) {
831                return "WPA_WPA2";
832            }
833            return "PSK";
834        } else if (security == SECURITY_EAP) {
835            return "EAP";
836        }
837        return "NONE";
838    }
839
840    static String removeDoubleQuotes(String string) {
841        if (TextUtils.isEmpty(string)) {
842            return "";
843        }
844        int length = string.length();
845        if ((length > 1) && (string.charAt(0) == '"')
846                && (string.charAt(length - 1) == '"')) {
847            return string.substring(1, length - 1);
848        }
849        return string;
850    }
851
852    public interface AccessPointListener {
853        void onAccessPointChanged(AccessPoint accessPoint);
854        void onLevelChanged(AccessPoint accessPoint);
855    }
856}
857