WifiNative.java revision 9d7489491984e86915b2cf4fac38a882de1c8cdb 
1/*
2 * Copyright (C) 2008 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.server.wifi;
18
19import android.annotation.Nullable;
20import android.app.AlarmManager;
21import android.app.PendingIntent;
22import android.content.BroadcastReceiver;
23import android.content.Context;
24import android.content.Intent;
25import android.content.IntentFilter;
26import android.net.wifi.RttManager;
27import android.net.wifi.RttManager.ResponderConfig;
28import android.net.wifi.ScanResult;
29import android.net.wifi.WifiConfiguration;
30import android.net.wifi.WifiEnterpriseConfig;
31import android.net.wifi.WifiLinkLayerStats;
32import android.net.wifi.WifiManager;
33import android.net.wifi.WifiScanner;
34import android.net.wifi.WifiSsid;
35import android.net.wifi.WifiWakeReasonAndCounts;
36import android.net.wifi.WpsInfo;
37import android.net.wifi.p2p.WifiP2pConfig;
38import android.net.wifi.p2p.WifiP2pGroup;
39import android.net.wifi.p2p.nsd.WifiP2pServiceInfo;
40import android.os.SystemClock;
41import android.os.SystemProperties;
42import android.text.TextUtils;
43import android.util.LocalLog;
44import android.util.Log;
45
46import com.android.server.connectivity.KeepalivePacketData;
47import com.android.server.wifi.hotspot2.NetworkDetail;
48import com.android.server.wifi.hotspot2.SupplicantBridge;
49import com.android.server.wifi.hotspot2.Utils;
50import com.android.server.wifi.util.InformationElementUtil;
51
52import libcore.util.HexEncoding;
53
54import org.json.JSONException;
55import org.json.JSONObject;
56
57import java.io.UnsupportedEncodingException;
58import java.net.URLDecoder;
59import java.net.URLEncoder;
60import java.nio.ByteBuffer;
61import java.nio.CharBuffer;
62import java.nio.charset.CharacterCodingException;
63import java.nio.charset.CharsetDecoder;
64import java.nio.charset.StandardCharsets;
65import java.util.ArrayList;
66import java.util.BitSet;
67import java.util.HashMap;
68import java.util.Iterator;
69import java.util.List;
70import java.util.Locale;
71import java.util.Map;
72import java.util.Set;
73
74
75/**
76 * Native calls for bring up/shut down of the supplicant daemon and for
77 * sending requests to the supplicant daemon
78 *
79 * waitForEvent() is called on the monitor thread for events. All other methods
80 * must be serialized from the framework.
81 *
82 * {@hide}
83 */
84public class WifiNative {
85    private static boolean DBG = false;
86
87    /**
88     * Hold this lock before calling supplicant or HAL methods
89     * it is required to mutually exclude access to the driver
90     */
91    public static final Object sLock = new Object();
92
93    private static final LocalLog sLocalLog = new LocalLog(16384);
94
95    public static LocalLog getLocalLog() {
96        return sLocalLog;
97    }
98
99    /* Register native functions */
100    static {
101        /* Native functions are defined in libwifi-service.so */
102        System.loadLibrary("wifi-service");
103        registerNatives();
104    }
105
106    private static native int registerNatives();
107
108    /*
109     * Singleton WifiNative instances
110     */
111    private static WifiNative wlanNativeInterface =
112            new WifiNative(SystemProperties.get("wifi.interface", "wlan0"));
113    public static WifiNative getWlanNativeInterface() {
114        return wlanNativeInterface;
115    }
116
117    //STOPSHIP: get interface name from native side
118    private static WifiNative p2pNativeInterface = new WifiNative("p2p0");
119    public static WifiNative getP2pNativeInterface() {
120        return p2pNativeInterface;
121    }
122
123
124    private final String mTAG;
125    private final String mInterfaceName;
126    private final String mInterfacePrefix;
127
128    private Context mContext = null;
129    private PnoMonitor mPnoMonitor = null;
130    public void initContext(Context context) {
131        if (mContext == null && context != null) {
132            mContext = context;
133            mPnoMonitor = new PnoMonitor();
134        }
135    }
136
137    private WifiNative(String interfaceName) {
138        mInterfaceName = interfaceName;
139        mTAG = "WifiNative-" + interfaceName;
140
141        if (!interfaceName.equals("p2p0")) {
142            mInterfacePrefix = "IFNAME=" + interfaceName + " ";
143        } else {
144            // commands for p2p0 interface don't need prefix
145            mInterfacePrefix = "";
146        }
147    }
148
149    public String getInterfaceName() {
150        return mInterfaceName;
151    }
152
153    // Note this affects logging on for all interfaces
154    void enableVerboseLogging(int verbose) {
155        if (verbose > 0) {
156            DBG = true;
157        } else {
158            DBG = false;
159        }
160    }
161
162    private void localLog(String s) {
163        if (sLocalLog != null) sLocalLog.log(mInterfaceName + ": " + s);
164    }
165
166
167
168    /*
169     * Driver and Supplicant management
170     */
171    private native static boolean loadDriverNative();
172    public boolean loadDriver() {
173        synchronized (sLock) {
174            return loadDriverNative();
175        }
176    }
177
178    private native static boolean isDriverLoadedNative();
179    public boolean isDriverLoaded() {
180        synchronized (sLock) {
181            return isDriverLoadedNative();
182        }
183    }
184
185    private native static boolean unloadDriverNative();
186    public boolean unloadDriver() {
187        synchronized (sLock) {
188            return unloadDriverNative();
189        }
190    }
191
192    private native static boolean startSupplicantNative(boolean p2pSupported);
193    public boolean startSupplicant(boolean p2pSupported) {
194        synchronized (sLock) {
195            return startSupplicantNative(p2pSupported);
196        }
197    }
198
199    /* Sends a kill signal to supplicant. To be used when we have lost connection
200       or when the supplicant is hung */
201    private native static boolean killSupplicantNative(boolean p2pSupported);
202    public boolean killSupplicant(boolean p2pSupported) {
203        synchronized (sLock) {
204            return killSupplicantNative(p2pSupported);
205        }
206    }
207
208    private native static boolean connectToSupplicantNative();
209    public boolean connectToSupplicant() {
210        synchronized (sLock) {
211            localLog(mInterfacePrefix + "connectToSupplicant");
212            return connectToSupplicantNative();
213        }
214    }
215
216    private native static void closeSupplicantConnectionNative();
217    public void closeSupplicantConnection() {
218        synchronized (sLock) {
219            localLog(mInterfacePrefix + "closeSupplicantConnection");
220            closeSupplicantConnectionNative();
221        }
222    }
223
224    /**
225     * Wait for the supplicant to send an event, returning the event string.
226     * @return the event string sent by the supplicant.
227     */
228    private native static String waitForEventNative();
229    public String waitForEvent() {
230        // No synchronization necessary .. it is implemented in WifiMonitor
231        return waitForEventNative();
232    }
233
234
235    /*
236     * Supplicant Command Primitives
237     */
238    private native boolean doBooleanCommandNative(String command);
239
240    private native int doIntCommandNative(String command);
241
242    private native String doStringCommandNative(String command);
243
244    private boolean doBooleanCommand(String command) {
245        if (DBG) Log.d(mTAG, "doBoolean: " + command);
246        synchronized (sLock) {
247            String toLog = mInterfacePrefix + command;
248            boolean result = doBooleanCommandNative(mInterfacePrefix + command);
249            localLog(toLog + " -> " + result);
250            if (DBG) Log.d(mTAG, command + ": returned " + result);
251            return result;
252        }
253    }
254
255    private boolean doBooleanCommandWithoutLogging(String command) {
256        if (DBG) Log.d(mTAG, "doBooleanCommandWithoutLogging: " + command);
257        synchronized (sLock) {
258            boolean result = doBooleanCommandNative(mInterfacePrefix + command);
259            if (DBG) Log.d(mTAG, command + ": returned " + result);
260            return result;
261        }
262    }
263
264    private int doIntCommand(String command) {
265        if (DBG) Log.d(mTAG, "doInt: " + command);
266        synchronized (sLock) {
267            String toLog = mInterfacePrefix + command;
268            int result = doIntCommandNative(mInterfacePrefix + command);
269            localLog(toLog + " -> " + result);
270            if (DBG) Log.d(mTAG, "   returned " + result);
271            return result;
272        }
273    }
274
275    private String doStringCommand(String command) {
276        if (DBG) {
277            //GET_NETWORK commands flood the logs
278            if (!command.startsWith("GET_NETWORK")) {
279                Log.d(mTAG, "doString: [" + command + "]");
280            }
281        }
282        synchronized (sLock) {
283            String toLog = mInterfacePrefix + command;
284            String result = doStringCommandNative(mInterfacePrefix + command);
285            if (result == null) {
286                if (DBG) Log.d(mTAG, "doStringCommandNative no result");
287            } else {
288                if (!command.startsWith("STATUS-")) {
289                    localLog(toLog + " -> " + result);
290                }
291                if (DBG) Log.d(mTAG, "   returned " + result.replace("\n", " "));
292            }
293            return result;
294        }
295    }
296
297    private String doStringCommandWithoutLogging(String command) {
298        if (DBG) {
299            //GET_NETWORK commands flood the logs
300            if (!command.startsWith("GET_NETWORK")) {
301                Log.d(mTAG, "doString: [" + command + "]");
302            }
303        }
304        synchronized (sLock) {
305            return doStringCommandNative(mInterfacePrefix + command);
306        }
307    }
308
309    public String doCustomSupplicantCommand(String command) {
310        return doStringCommand(command);
311    }
312
313    /*
314     * Wrappers for supplicant commands
315     */
316    public boolean ping() {
317        String pong = doStringCommand("PING");
318        return (pong != null && pong.equals("PONG"));
319    }
320
321    public void setSupplicantLogLevel(String level) {
322        doStringCommand("LOG_LEVEL " + level);
323    }
324
325    public String getFreqCapability() {
326        return doStringCommand("GET_CAPABILITY freq");
327    }
328
329
330    /**
331     * Start a scan using wpa_supplicant for the given frequencies.
332     * If freqs is null then all supported channels are scanned.
333     */
334    public boolean scan(Set<Integer> freqs) {
335        if (freqs == null) {
336            return scanFrequencyList(null);
337        } else if (freqs.size() != 0) {
338            StringBuilder freqList = new StringBuilder();
339            boolean first = true;
340            for (Integer freq : freqs) {
341                if (!first) {
342                    freqList.append(",");
343                }
344                freqList.append(freq.toString());
345                first = false;
346            }
347            return scanFrequencyList(freqList.toString());
348        } else {
349            return false;
350        }
351    }
352
353    private boolean scanFrequencyList(String freqList) {
354        if (freqList == null) {
355            return doBooleanCommand("SCAN TYPE=ONLY");
356        } else {
357            return doBooleanCommand("SCAN TYPE=ONLY freq=" + freqList);
358        }
359    }
360
361    /* Does a graceful shutdown of supplicant. Is a common stop function for both p2p and sta.
362     *
363     * Note that underneath we use a harsh-sounding "terminate" supplicant command
364     * for a graceful stop and a mild-sounding "stop" interface
365     * to kill the process
366     */
367    public boolean stopSupplicant() {
368        return doBooleanCommand("TERMINATE");
369    }
370
371    public String listNetworks() {
372        return doStringCommand("LIST_NETWORKS");
373    }
374
375    public String listNetworks(int last_id) {
376        return doStringCommand("LIST_NETWORKS LAST_ID=" + last_id);
377    }
378
379    public int addNetwork() {
380        return doIntCommand("ADD_NETWORK");
381    }
382
383    public boolean setNetworkExtra(int netId, String name, Map<String, String> values) {
384        final String encoded;
385        try {
386            encoded = URLEncoder.encode(new JSONObject(values).toString(), "UTF-8");
387        } catch (NullPointerException e) {
388            Log.e(TAG, "Unable to serialize networkExtra: " + e.toString());
389            return false;
390        } catch (UnsupportedEncodingException e) {
391            Log.e(TAG, "Unable to serialize networkExtra: " + e.toString());
392            return false;
393        }
394        return setNetworkVariable(netId, name, "\"" + encoded + "\"");
395    }
396
397    public boolean setNetworkVariable(int netId, String name, String value) {
398        if (TextUtils.isEmpty(name) || TextUtils.isEmpty(value)) return false;
399        if (name.equals(WifiConfiguration.pskVarName)
400                || name.equals(WifiEnterpriseConfig.PASSWORD_KEY)) {
401            return doBooleanCommandWithoutLogging("SET_NETWORK " + netId + " " + name + " " + value);
402        } else {
403            return doBooleanCommand("SET_NETWORK " + netId + " " + name + " " + value);
404        }
405    }
406
407    public Map<String, String> getNetworkExtra(int netId, String name) {
408        final String wrapped = getNetworkVariable(netId, name);
409        if (wrapped == null || !wrapped.startsWith("\"") || !wrapped.endsWith("\"")) {
410            return null;
411        }
412        try {
413            final String encoded = wrapped.substring(1, wrapped.length() - 1);
414            // This method reads a JSON dictionary that was written by setNetworkExtra(). However,
415            // on devices that upgraded from Marshmallow, it may encounter a legacy value instead -
416            // an FQDN stored as a plain string. If such a value is encountered, the JSONObject
417            // constructor will thrown a JSONException and the method will return null.
418            final JSONObject json = new JSONObject(URLDecoder.decode(encoded, "UTF-8"));
419            final Map<String, String> values = new HashMap<String, String>();
420            final Iterator<?> it = json.keys();
421            while (it.hasNext()) {
422                final String key = (String) it.next();
423                final Object value = json.get(key);
424                if (value instanceof String) {
425                    values.put(key, (String) value);
426                }
427            }
428            return values;
429        } catch (UnsupportedEncodingException e) {
430            Log.e(TAG, "Unable to serialize networkExtra: " + e.toString());
431            return null;
432        } catch (JSONException e) {
433            // This is not necessarily an error. This exception will also occur if we encounter a
434            // legacy FQDN stored as a plain string. We want to return null in this case as no JSON
435            // dictionary of extras was found.
436            return null;
437        }
438    }
439
440    public String getNetworkVariable(int netId, String name) {
441        if (TextUtils.isEmpty(name)) return null;
442
443        // GET_NETWORK will likely flood the logs ...
444        return doStringCommandWithoutLogging("GET_NETWORK " + netId + " " + name);
445    }
446
447    public boolean removeNetwork(int netId) {
448        return doBooleanCommand("REMOVE_NETWORK " + netId);
449    }
450
451
452    private void logDbg(String debug) {
453        long now = SystemClock.elapsedRealtimeNanos();
454        String ts = String.format("[%,d us] ", now/1000);
455        Log.e("WifiNative: ", ts+debug+ " stack:"
456                + Thread.currentThread().getStackTrace()[2].getMethodName() +" - "
457                + Thread.currentThread().getStackTrace()[3].getMethodName() +" - "
458                + Thread.currentThread().getStackTrace()[4].getMethodName() +" - "
459                + Thread.currentThread().getStackTrace()[5].getMethodName()+" - "
460                + Thread.currentThread().getStackTrace()[6].getMethodName());
461
462    }
463
464    /**
465     * Enables a network in wpa_supplicant.
466     * @param netId - Network ID of the network to be enabled.
467     * @return true if command succeeded, false otherwise.
468     */
469    public boolean enableNetwork(int netId) {
470        if (DBG) logDbg("enableNetwork nid=" + Integer.toString(netId));
471        return doBooleanCommand("ENABLE_NETWORK " + netId);
472    }
473
474    /**
475     * Disables a network in wpa_supplicant.
476     * @param netId - Network ID of the network to be disabled.
477     * @return true if command succeeded, false otherwise.
478     */
479    public boolean disableNetwork(int netId) {
480        if (DBG) logDbg("disableNetwork nid=" + Integer.toString(netId));
481        return doBooleanCommand("DISABLE_NETWORK " + netId);
482    }
483
484    /**
485     * Select a network in wpa_supplicant (Disables all others).
486     * @param netId - Network ID of the network to be selected.
487     * @return true if command succeeded, false otherwise.
488     */
489    public boolean selectNetwork(int netId) {
490        if (DBG) logDbg("selectNetwork nid=" + Integer.toString(netId));
491        return doBooleanCommand("SELECT_NETWORK " + netId);
492    }
493
494    public boolean reconnect() {
495        if (DBG) logDbg("RECONNECT ");
496        return doBooleanCommand("RECONNECT");
497    }
498
499    public boolean reassociate() {
500        if (DBG) logDbg("REASSOCIATE ");
501        return doBooleanCommand("REASSOCIATE");
502    }
503
504    public boolean disconnect() {
505        if (DBG) logDbg("DISCONNECT ");
506        return doBooleanCommand("DISCONNECT");
507    }
508
509    public String status() {
510        return status(false);
511    }
512
513    public String status(boolean noEvents) {
514        if (noEvents) {
515            return doStringCommand("STATUS-NO_EVENTS");
516        } else {
517            return doStringCommand("STATUS");
518        }
519    }
520
521    public String getMacAddress() {
522        //Macaddr = XX.XX.XX.XX.XX.XX
523        String ret = doStringCommand("DRIVER MACADDR");
524        if (!TextUtils.isEmpty(ret)) {
525            String[] tokens = ret.split(" = ");
526            if (tokens.length == 2) return tokens[1];
527        }
528        return null;
529    }
530
531
532
533    /**
534     * Format of results:
535     * =================
536     * id=1
537     * bssid=68:7f:76:d7:1a:6e
538     * freq=2412
539     * level=-44
540     * tsf=1344626243700342
541     * flags=[WPA2-PSK-CCMP][WPS][ESS]
542     * ssid=zfdy
543     * ====
544     * id=2
545     * bssid=68:5f:74:d7:1a:6f
546     * freq=5180
547     * level=-73
548     * tsf=1344626243700373
549     * flags=[WPA2-PSK-CCMP][WPS][ESS]
550     * ssid=zuby
551     * ====
552     *
553     * RANGE=ALL gets all scan results
554     * RANGE=ID- gets results from ID
555     * MASK=<N> see wpa_supplicant/src/common/wpa_ctrl.h for details
556     * 0                         0                        1                       0     2
557     *                           WPA_BSS_MASK_MESH_SCAN | WPA_BSS_MASK_DELIM    | WPA_BSS_MASK_WIFI_DISPLAY
558     * 0                         0                        0                       1     1   -> 9
559     * WPA_BSS_MASK_INTERNETW  | WPA_BSS_MASK_P2P_SCAN  | WPA_BSS_MASK_WPS_SCAN | WPA_BSS_MASK_SSID
560     * 1                         0                        0                       1     9   -> d
561     * WPA_BSS_MASK_FLAGS      | WPA_BSS_MASK_IE        | WPA_BSS_MASK_AGE      | WPA_BSS_MASK_TSF
562     * 1                         0                        0                       0     8
563     * WPA_BSS_MASK_LEVEL      | WPA_BSS_MASK_NOISE     | WPA_BSS_MASK_QUAL     | WPA_BSS_MASK_CAPABILITIES
564     * 0                         1                        1                       1     7
565     * WPA_BSS_MASK_BEACON_INT | WPA_BSS_MASK_FREQ      | WPA_BSS_MASK_BSSID    | WPA_BSS_MASK_ID
566     *
567     * WPA_BSS_MASK_INTERNETW adds ANQP info (ctrl_iface:4151-4176)
568     *
569     * ctrl_iface.c:wpa_supplicant_ctrl_iface_process:7884
570     *  wpa_supplicant_ctrl_iface_bss:4315
571     *  print_bss_info
572     */
573    private String getRawScanResults(String range) {
574        return doStringCommandWithoutLogging("BSS RANGE=" + range + " MASK=0x29d87");
575    }
576
577    private static final String BSS_IE_STR = "ie=";
578    private static final String BSS_ID_STR = "id=";
579    private static final String BSS_BSSID_STR = "bssid=";
580    private static final String BSS_FREQ_STR = "freq=";
581    private static final String BSS_LEVEL_STR = "level=";
582    private static final String BSS_TSF_STR = "tsf=";
583    private static final String BSS_FLAGS_STR = "flags=";
584    private static final String BSS_SSID_STR = "ssid=";
585    private static final String BSS_DELIMITER_STR = "====";
586    private static final String BSS_END_STR = "####";
587
588    public ArrayList<ScanDetail> getScanResults() {
589        int next_sid = 0;
590        ArrayList<ScanDetail> results = new ArrayList<>();
591        while(next_sid >= 0) {
592            String rawResult = getRawScanResults(next_sid+"-");
593            next_sid = -1;
594
595            if (TextUtils.isEmpty(rawResult))
596                break;
597
598            String[] lines = rawResult.split("\n");
599
600
601            // note that all these splits and substrings keep references to the original
602            // huge string buffer while the amount we really want is generally pretty small
603            // so make copies instead (one example b/11087956 wasted 400k of heap here).
604            final int bssidStrLen = BSS_BSSID_STR.length();
605            final int flagLen = BSS_FLAGS_STR.length();
606
607            String bssid = "";
608            int level = 0;
609            int freq = 0;
610            long tsf = 0;
611            String flags = "";
612            WifiSsid wifiSsid = null;
613            String infoElementsStr = null;
614            List<String> anqpLines = null;
615
616            for (String line : lines) {
617                if (line.startsWith(BSS_ID_STR)) { // Will find the last id line
618                    try {
619                        next_sid = Integer.parseInt(line.substring(BSS_ID_STR.length())) + 1;
620                    } catch (NumberFormatException e) {
621                        // Nothing to do
622                    }
623                } else if (line.startsWith(BSS_BSSID_STR)) {
624                    bssid = new String(line.getBytes(), bssidStrLen, line.length() - bssidStrLen);
625                } else if (line.startsWith(BSS_FREQ_STR)) {
626                    try {
627                        freq = Integer.parseInt(line.substring(BSS_FREQ_STR.length()));
628                    } catch (NumberFormatException e) {
629                        freq = 0;
630                    }
631                } else if (line.startsWith(BSS_LEVEL_STR)) {
632                    try {
633                        level = Integer.parseInt(line.substring(BSS_LEVEL_STR.length()));
634                        /* some implementations avoid negative values by adding 256
635                         * so we need to adjust for that here.
636                         */
637                        if (level > 0) level -= 256;
638                    } catch (NumberFormatException e) {
639                        level = 0;
640                    }
641                } else if (line.startsWith(BSS_TSF_STR)) {
642                    try {
643                        tsf = Long.parseLong(line.substring(BSS_TSF_STR.length()));
644                    } catch (NumberFormatException e) {
645                        tsf = 0;
646                    }
647                } else if (line.startsWith(BSS_FLAGS_STR)) {
648                    flags = new String(line.getBytes(), flagLen, line.length() - flagLen);
649                } else if (line.startsWith(BSS_SSID_STR)) {
650                    wifiSsid = WifiSsid.createFromAsciiEncoded(
651                            line.substring(BSS_SSID_STR.length()));
652                } else if (line.startsWith(BSS_IE_STR)) {
653                    infoElementsStr = line;
654                } else if (SupplicantBridge.isAnqpAttribute(line)) {
655                    if (anqpLines == null) {
656                        anqpLines = new ArrayList<>();
657                    }
658                    anqpLines.add(line);
659                } else if (line.startsWith(BSS_DELIMITER_STR) || line.startsWith(BSS_END_STR)) {
660                    if (bssid != null) {
661                        try {
662                            if (infoElementsStr == null) {
663                                throw new IllegalArgumentException("Null information element data");
664                            }
665                            int seperator = infoElementsStr.indexOf('=');
666                            if (seperator < 0) {
667                                throw new IllegalArgumentException("No element separator");
668                            }
669
670                            ScanResult.InformationElement[] infoElements =
671                                        InformationElementUtil.parseInformationElements(
672                                        Utils.hexToBytes(infoElementsStr.substring(seperator + 1)));
673
674                            NetworkDetail networkDetail = new NetworkDetail(bssid,
675                                    infoElements, anqpLines, freq);
676                            if (DBG) {
677                                Log.v(TAG + ":DTIM", "SSID" + networkDetail.getSSID()
678                                        + ", DTIM=" + networkDetail.getDtimInterval() + ", "
679                                        + " IEstr:" + infoElementsStr);
680                            }
681                            String xssid = (wifiSsid != null) ? wifiSsid.toString() : WifiSsid.NONE;
682                            if (!xssid.equals(networkDetail.getTrimmedSSID())) {
683                                Log.d(TAG, String.format(
684                                        "Inconsistent SSID on BSSID '%s': '%s' vs '%s': %s",
685                                        bssid, xssid, networkDetail.getSSID(), infoElementsStr));
686                            }
687
688                            if (networkDetail.hasInterworking()) {
689                                Log.d(TAG, "HSNwk: '" + networkDetail);
690                            }
691                            ScanDetail scan = new ScanDetail(networkDetail, wifiSsid, bssid, flags,
692                                    level, freq, tsf, infoElements, anqpLines);
693                            results.add(scan);
694                        } catch (IllegalArgumentException iae) {
695                            Log.d(TAG, "Failed to parse information elements: " + iae);
696                        }
697                    }
698                    bssid = null;
699                    level = 0;
700                    freq = 0;
701                    tsf = 0;
702                    flags = "";
703                    wifiSsid = null;
704                    infoElementsStr = null;
705                    anqpLines = null;
706                }
707            }
708        }
709        return results;
710    }
711
712    /**
713     * Format of result:
714     * id=1016
715     * bssid=00:03:7f:40:84:10
716     * freq=2462
717     * beacon_int=200
718     * capabilities=0x0431
719     * qual=0
720     * noise=0
721     * level=-46
722     * tsf=0000002669008476
723     * age=5
724     * ie=00105143412d485332302d52322d54455354010882848b960c12182403010b0706555...
725     * flags=[WPA2-EAP-CCMP][ESS][P2P][HS20]
726     * ssid=QCA-HS20-R2-TEST
727     * p2p_device_name=
728     * p2p_config_methods=0x0SET_NE
729     * anqp_venue_name=02083d656e6757692d466920416c6c69616e63650a3239383920436f...
730     * anqp_network_auth_type=010000
731     * anqp_roaming_consortium=03506f9a05001bc504bd
732     * anqp_ip_addr_type_availability=0c
733     * anqp_nai_realm=0200300000246d61696c2e6578616d706c652e636f6d3b636973636f2...
734     * anqp_3gpp=000600040132f465
735     * anqp_domain_name=0b65786d61706c652e636f6d
736     * hs20_operator_friendly_name=11656e6757692d466920416c6c69616e63650e636869...
737     * hs20_wan_metrics=01c40900008001000000000a00
738     * hs20_connection_capability=0100000006140001061600000650000106bb010106bb0...
739     * hs20_osu_providers_list=0b5143412d4f53552d425353010901310015656e6757692d...
740     */
741    public String scanResult(String bssid) {
742        return doStringCommand("BSS " + bssid);
743    }
744
745    public boolean startDriver() {
746        return doBooleanCommand("DRIVER START");
747    }
748
749    public boolean stopDriver() {
750        return doBooleanCommand("DRIVER STOP");
751    }
752
753
754    /**
755     * Start filtering out Multicast V4 packets
756     * @return {@code true} if the operation succeeded, {@code false} otherwise
757     *
758     * Multicast filtering rules work as follows:
759     *
760     * The driver can filter multicast (v4 and/or v6) and broadcast packets when in
761     * a power optimized mode (typically when screen goes off).
762     *
763     * In order to prevent the driver from filtering the multicast/broadcast packets, we have to
764     * add a DRIVER RXFILTER-ADD rule followed by DRIVER RXFILTER-START to make the rule effective
765     *
766     * DRIVER RXFILTER-ADD Num
767     *   where Num = 0 - Unicast, 1 - Broadcast, 2 - Mutil4 or 3 - Multi6
768     *
769     * and DRIVER RXFILTER-START
770     * In order to stop the usage of these rules, we do
771     *
772     * DRIVER RXFILTER-STOP
773     * DRIVER RXFILTER-REMOVE Num
774     *   where Num is as described for RXFILTER-ADD
775     *
776     * The  SETSUSPENDOPT driver command overrides the filtering rules
777     */
778    public boolean startFilteringMulticastV4Packets() {
779        return doBooleanCommand("DRIVER RXFILTER-STOP")
780            && doBooleanCommand("DRIVER RXFILTER-REMOVE 2")
781            && doBooleanCommand("DRIVER RXFILTER-START");
782    }
783
784    /**
785     * Stop filtering out Multicast V4 packets.
786     * @return {@code true} if the operation succeeded, {@code false} otherwise
787     */
788    public boolean stopFilteringMulticastV4Packets() {
789        return doBooleanCommand("DRIVER RXFILTER-STOP")
790            && doBooleanCommand("DRIVER RXFILTER-ADD 2")
791            && doBooleanCommand("DRIVER RXFILTER-START");
792    }
793
794    /**
795     * Start filtering out Multicast V6 packets
796     * @return {@code true} if the operation succeeded, {@code false} otherwise
797     */
798    public boolean startFilteringMulticastV6Packets() {
799        return doBooleanCommand("DRIVER RXFILTER-STOP")
800            && doBooleanCommand("DRIVER RXFILTER-REMOVE 3")
801            && doBooleanCommand("DRIVER RXFILTER-START");
802    }
803
804    /**
805     * Stop filtering out Multicast V6 packets.
806     * @return {@code true} if the operation succeeded, {@code false} otherwise
807     */
808    public boolean stopFilteringMulticastV6Packets() {
809        return doBooleanCommand("DRIVER RXFILTER-STOP")
810            && doBooleanCommand("DRIVER RXFILTER-ADD 3")
811            && doBooleanCommand("DRIVER RXFILTER-START");
812    }
813
814    /**
815     * Set the operational frequency band
816     * @param band One of
817     *     {@link WifiManager#WIFI_FREQUENCY_BAND_AUTO},
818     *     {@link WifiManager#WIFI_FREQUENCY_BAND_5GHZ},
819     *     {@link WifiManager#WIFI_FREQUENCY_BAND_2GHZ},
820     * @return {@code true} if the operation succeeded, {@code false} otherwise
821     */
822    public boolean setBand(int band) {
823        String bandstr;
824
825        if (band == WifiManager.WIFI_FREQUENCY_BAND_5GHZ)
826            bandstr = "5G";
827        else if (band == WifiManager.WIFI_FREQUENCY_BAND_2GHZ)
828            bandstr = "2G";
829        else
830            bandstr = "AUTO";
831        return doBooleanCommand("SET SETBAND " + bandstr);
832    }
833
834    public static final int BLUETOOTH_COEXISTENCE_MODE_ENABLED     = 0;
835    public static final int BLUETOOTH_COEXISTENCE_MODE_DISABLED    = 1;
836    public static final int BLUETOOTH_COEXISTENCE_MODE_SENSE       = 2;
837    /**
838      * Sets the bluetooth coexistence mode.
839      *
840      * @param mode One of {@link #BLUETOOTH_COEXISTENCE_MODE_DISABLED},
841      *            {@link #BLUETOOTH_COEXISTENCE_MODE_ENABLED}, or
842      *            {@link #BLUETOOTH_COEXISTENCE_MODE_SENSE}.
843      * @return Whether the mode was successfully set.
844      */
845    public boolean setBluetoothCoexistenceMode(int mode) {
846        return doBooleanCommand("DRIVER BTCOEXMODE " + mode);
847    }
848
849    /**
850     * Enable or disable Bluetooth coexistence scan mode. When this mode is on,
851     * some of the low-level scan parameters used by the driver are changed to
852     * reduce interference with A2DP streaming.
853     *
854     * @param isSet whether to enable or disable this mode
855     * @return {@code true} if the command succeeded, {@code false} otherwise.
856     */
857    public boolean setBluetoothCoexistenceScanMode(boolean setCoexScanMode) {
858        if (setCoexScanMode) {
859            return doBooleanCommand("DRIVER BTCOEXSCAN-START");
860        } else {
861            return doBooleanCommand("DRIVER BTCOEXSCAN-STOP");
862        }
863    }
864
865    public void enableSaveConfig() {
866        doBooleanCommand("SET update_config 1");
867    }
868
869    public boolean saveConfig() {
870        return doBooleanCommand("SAVE_CONFIG");
871    }
872
873    public boolean addToBlacklist(String bssid) {
874        if (TextUtils.isEmpty(bssid)) return false;
875        return doBooleanCommand("BLACKLIST " + bssid);
876    }
877
878    public boolean clearBlacklist() {
879        return doBooleanCommand("BLACKLIST clear");
880    }
881
882    public boolean setSuspendOptimizations(boolean enabled) {
883        if (enabled) {
884            return doBooleanCommand("DRIVER SETSUSPENDMODE 1");
885        } else {
886            return doBooleanCommand("DRIVER SETSUSPENDMODE 0");
887        }
888    }
889
890    public boolean setCountryCode(String countryCode) {
891        if (countryCode != null)
892            return doBooleanCommand("DRIVER COUNTRY " + countryCode.toUpperCase(Locale.ROOT));
893        else
894            return doBooleanCommand("DRIVER COUNTRY");
895    }
896
897
898    //PNO Monitor
899    private class PnoMonitor {
900        private static final int MINIMUM_PNO_GAP = 5 * 1000;
901        private static final String ACTION_TOGGLE_PNO =
902            "com.android.server.Wifi.action.TOGGLE_PNO";
903        long mLastPnoChangeTimeStamp = -1L;
904        boolean mExpectedPnoState = false;
905        List<WifiPnoNetwork> mExpectedWifiPnoNetworkList = null;
906        boolean mCurrentPnoState = false;;
907        boolean mWaitForTimer = false;
908        final Object mPnoLock = new Object();
909        private final AlarmManager mAlarmManager =
910                (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE);
911        private final PendingIntent mPnoIntent;
912
913        public PnoMonitor() {
914            Intent intent = new Intent(ACTION_TOGGLE_PNO, null);
915            intent.setPackage("android");
916            mPnoIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0);
917
918            mContext.registerReceiver(
919                new BroadcastReceiver() {
920                    @Override
921                    public void onReceive(Context context, Intent intent) {
922                        synchronized(mPnoLock) {
923                            if (DBG) Log.d(mTAG, "PNO timer expire, PNO should change to " +
924                                    mExpectedPnoState);
925                            if (mCurrentPnoState != mExpectedPnoState) {
926                                if (DBG) Log.d(mTAG, "change PNO from " + mCurrentPnoState + " to "
927                                        + mExpectedPnoState);
928                                boolean ret = setPno(
929                                        mExpectedPnoState, mExpectedWifiPnoNetworkList);
930                                if (!ret) {
931                                    Log.e(mTAG, "set PNO failure");
932                                }
933                            } else {
934                                if (DBG) Log.d(mTAG, "Do not change PNO since current is expected");
935                            }
936                            mWaitForTimer = false;
937                        }
938                    }
939                },
940                new IntentFilter(ACTION_TOGGLE_PNO));
941        }
942
943        /*  Enable/Disable PNO with updated network priorities.
944         *
945         * @param enable boolean indicating whether PNO is being enabled or disabled.
946         * @param pnoNetworkList list of networks with priorities to be set before PNO setting.
947         */
948        private boolean setPno(boolean enable, List<WifiPnoNetwork> pnoNetworkList) {
949            // TODO: Couple of cases yet to be handled:
950            // 1. What if the network priority update fails, should we bail out of PNO setting?
951            // 2. If PNO setting fails below, should we go back and revert this priority change?
952            if (pnoNetworkList != null) {
953                if (DBG) Log.i(mTAG, "Update priorities for PNO. Enable: " + enable);
954                for (WifiPnoNetwork pnoNetwork : pnoNetworkList) {
955                    // What if this fails? Should we bail out?
956                    boolean isSuccess = setNetworkVariable(pnoNetwork.networkId,
957                            WifiConfiguration.priorityVarName,
958                            Integer.toString(pnoNetwork.priority));
959                    if (!isSuccess) {
960                        Log.e(mTAG, "Update priority failed for :" + pnoNetwork.networkId);
961                    }
962                }
963            }
964            String cmd = enable ? "SET pno 1" : "SET pno 0";
965            boolean ret = doBooleanCommand(cmd);
966            mLastPnoChangeTimeStamp = System.currentTimeMillis();
967            if (ret) {
968                mCurrentPnoState = enable;
969            }
970            return ret;
971        }
972
973        public boolean enableBackgroundScan(
974                boolean enable,
975                List<WifiPnoNetwork> pnoNetworkList) {
976            synchronized(mPnoLock) {
977                if (mWaitForTimer) {
978                    //already has a timer
979                    mExpectedPnoState = enable;
980                    mExpectedWifiPnoNetworkList = pnoNetworkList;
981                    if (DBG) Log.d(mTAG, "update expected PNO to " +  mExpectedPnoState);
982                } else {
983                    if (mCurrentPnoState == enable) {
984                        return true;
985                    }
986                    long timeDifference = System.currentTimeMillis() - mLastPnoChangeTimeStamp;
987                    if (timeDifference >= MINIMUM_PNO_GAP) {
988                        return setPno(enable, pnoNetworkList);
989                    } else {
990                        mExpectedPnoState = enable;
991                        mExpectedWifiPnoNetworkList = pnoNetworkList;
992                        mWaitForTimer = true;
993                        if (DBG) Log.d(mTAG, "start PNO timer with delay:" + timeDifference);
994                        mAlarmManager.set(AlarmManager.RTC_WAKEUP,
995                                System.currentTimeMillis() + timeDifference, mPnoIntent);
996                    }
997                }
998                return true;
999            }
1000        }
1001    }
1002
1003    public boolean enableBackgroundScan(
1004            boolean enable,
1005            List<WifiPnoNetwork> pnoNetworkList) {
1006        if (mPnoMonitor != null) {
1007            return mPnoMonitor.enableBackgroundScan(enable, pnoNetworkList);
1008        } else {
1009            return false;
1010        }
1011    }
1012
1013    public void enableAutoConnect(boolean enable) {
1014        if (enable) {
1015            doBooleanCommand("STA_AUTOCONNECT 1");
1016        } else {
1017            doBooleanCommand("STA_AUTOCONNECT 0");
1018        }
1019    }
1020
1021    public void setScanInterval(int scanInterval) {
1022        doBooleanCommand("SCAN_INTERVAL " + scanInterval);
1023    }
1024
1025    public void setHs20(boolean hs20) {
1026        if (hs20) {
1027            doBooleanCommand("SET HS20 1");
1028        } else {
1029            doBooleanCommand("SET HS20 0");
1030        }
1031    }
1032
1033    public void startTdls(String macAddr, boolean enable) {
1034        if (enable) {
1035            synchronized (sLock) {
1036                doBooleanCommand("TDLS_DISCOVER " + macAddr);
1037                doBooleanCommand("TDLS_SETUP " + macAddr);
1038            }
1039        } else {
1040            doBooleanCommand("TDLS_TEARDOWN " + macAddr);
1041        }
1042    }
1043
1044    /** Example output:
1045     * RSSI=-65
1046     * LINKSPEED=48
1047     * NOISE=9999
1048     * FREQUENCY=0
1049     */
1050    public String signalPoll() {
1051        return doStringCommandWithoutLogging("SIGNAL_POLL");
1052    }
1053
1054    /** Example outout:
1055     * TXGOOD=396
1056     * TXBAD=1
1057     */
1058    public String pktcntPoll() {
1059        return doStringCommand("PKTCNT_POLL");
1060    }
1061
1062    public void bssFlush() {
1063        doBooleanCommand("BSS_FLUSH 0");
1064    }
1065
1066    public boolean startWpsPbc(String bssid) {
1067        if (TextUtils.isEmpty(bssid)) {
1068            return doBooleanCommand("WPS_PBC");
1069        } else {
1070            return doBooleanCommand("WPS_PBC " + bssid);
1071        }
1072    }
1073
1074    public boolean startWpsPbc(String iface, String bssid) {
1075        synchronized (sLock) {
1076            if (TextUtils.isEmpty(bssid)) {
1077                return doBooleanCommandNative("IFNAME=" + iface + " WPS_PBC");
1078            } else {
1079                return doBooleanCommandNative("IFNAME=" + iface + " WPS_PBC " + bssid);
1080            }
1081        }
1082    }
1083
1084    public boolean startWpsPinKeypad(String pin) {
1085        if (TextUtils.isEmpty(pin)) return false;
1086        return doBooleanCommand("WPS_PIN any " + pin);
1087    }
1088
1089    public boolean startWpsPinKeypad(String iface, String pin) {
1090        if (TextUtils.isEmpty(pin)) return false;
1091        synchronized (sLock) {
1092            return doBooleanCommandNative("IFNAME=" + iface + " WPS_PIN any " + pin);
1093        }
1094    }
1095
1096
1097    public String startWpsPinDisplay(String bssid) {
1098        if (TextUtils.isEmpty(bssid)) {
1099            return doStringCommand("WPS_PIN any");
1100        } else {
1101            return doStringCommand("WPS_PIN " + bssid);
1102        }
1103    }
1104
1105    public String startWpsPinDisplay(String iface, String bssid) {
1106        synchronized (sLock) {
1107            if (TextUtils.isEmpty(bssid)) {
1108                return doStringCommandNative("IFNAME=" + iface + " WPS_PIN any");
1109            } else {
1110                return doStringCommandNative("IFNAME=" + iface + " WPS_PIN " + bssid);
1111            }
1112        }
1113    }
1114
1115    public boolean setExternalSim(boolean external) {
1116        String value = external ? "1" : "0";
1117        Log.d(TAG, "Setting external_sim to " + value);
1118        return doBooleanCommand("SET external_sim " + value);
1119    }
1120
1121    public boolean simAuthResponse(int id, String type, String response) {
1122        // with type = GSM-AUTH, UMTS-AUTH or UMTS-AUTS
1123        return doBooleanCommand("CTRL-RSP-SIM-" + id + ":" + type + response);
1124    }
1125
1126    public boolean simAuthFailedResponse(int id) {
1127        // should be used with type GSM-AUTH
1128        return doBooleanCommand("CTRL-RSP-SIM-" + id + ":GSM-FAIL");
1129    }
1130
1131    public boolean umtsAuthFailedResponse(int id) {
1132        // should be used with type UMTS-AUTH
1133        return doBooleanCommand("CTRL-RSP-SIM-" + id + ":UMTS-FAIL");
1134    }
1135
1136    public boolean simIdentityResponse(int id, String response) {
1137        return doBooleanCommand("CTRL-RSP-IDENTITY-" + id + ":" + response);
1138    }
1139
1140    /* Configures an access point connection */
1141    public boolean startWpsRegistrar(String bssid, String pin) {
1142        if (TextUtils.isEmpty(bssid) || TextUtils.isEmpty(pin)) return false;
1143        return doBooleanCommand("WPS_REG " + bssid + " " + pin);
1144    }
1145
1146    public boolean cancelWps() {
1147        return doBooleanCommand("WPS_CANCEL");
1148    }
1149
1150    public boolean setPersistentReconnect(boolean enabled) {
1151        int value = (enabled == true) ? 1 : 0;
1152        return doBooleanCommand("SET persistent_reconnect " + value);
1153    }
1154
1155    public boolean setDeviceName(String name) {
1156        return doBooleanCommand("SET device_name " + name);
1157    }
1158
1159    public boolean setDeviceType(String type) {
1160        return doBooleanCommand("SET device_type " + type);
1161    }
1162
1163    public boolean setConfigMethods(String cfg) {
1164        return doBooleanCommand("SET config_methods " + cfg);
1165    }
1166
1167    public boolean setManufacturer(String value) {
1168        return doBooleanCommand("SET manufacturer " + value);
1169    }
1170
1171    public boolean setModelName(String value) {
1172        return doBooleanCommand("SET model_name " + value);
1173    }
1174
1175    public boolean setModelNumber(String value) {
1176        return doBooleanCommand("SET model_number " + value);
1177    }
1178
1179    public boolean setSerialNumber(String value) {
1180        return doBooleanCommand("SET serial_number " + value);
1181    }
1182
1183    public boolean setP2pSsidPostfix(String postfix) {
1184        return doBooleanCommand("SET p2p_ssid_postfix " + postfix);
1185    }
1186
1187    public boolean setP2pGroupIdle(String iface, int time) {
1188        synchronized (sLock) {
1189            return doBooleanCommandNative("IFNAME=" + iface + " SET p2p_group_idle " + time);
1190        }
1191    }
1192
1193    public void setPowerSave(boolean enabled) {
1194        if (enabled) {
1195            doBooleanCommand("SET ps 1");
1196        } else {
1197            doBooleanCommand("SET ps 0");
1198        }
1199    }
1200
1201    public boolean setP2pPowerSave(String iface, boolean enabled) {
1202        synchronized (sLock) {
1203            if (enabled) {
1204                return doBooleanCommandNative("IFNAME=" + iface + " P2P_SET ps 1");
1205            } else {
1206                return doBooleanCommandNative("IFNAME=" + iface + " P2P_SET ps 0");
1207            }
1208        }
1209    }
1210
1211    public boolean setWfdEnable(boolean enable) {
1212        return doBooleanCommand("SET wifi_display " + (enable ? "1" : "0"));
1213    }
1214
1215    public boolean setWfdDeviceInfo(String hex) {
1216        return doBooleanCommand("WFD_SUBELEM_SET 0 " + hex);
1217    }
1218
1219    /**
1220     * "sta" prioritizes STA connection over P2P and "p2p" prioritizes
1221     * P2P connection over STA
1222     */
1223    public boolean setConcurrencyPriority(String s) {
1224        return doBooleanCommand("P2P_SET conc_pref " + s);
1225    }
1226
1227    public boolean p2pFind() {
1228        return doBooleanCommand("P2P_FIND");
1229    }
1230
1231    public boolean p2pFind(int timeout) {
1232        if (timeout <= 0) {
1233            return p2pFind();
1234        }
1235        return doBooleanCommand("P2P_FIND " + timeout);
1236    }
1237
1238    public boolean p2pStopFind() {
1239       return doBooleanCommand("P2P_STOP_FIND");
1240    }
1241
1242    public boolean p2pListen() {
1243        return doBooleanCommand("P2P_LISTEN");
1244    }
1245
1246    public boolean p2pListen(int timeout) {
1247        if (timeout <= 0) {
1248            return p2pListen();
1249        }
1250        return doBooleanCommand("P2P_LISTEN " + timeout);
1251    }
1252
1253    public boolean p2pExtListen(boolean enable, int period, int interval) {
1254        if (enable && interval < period) {
1255            return false;
1256        }
1257        return doBooleanCommand("P2P_EXT_LISTEN"
1258                    + (enable ? (" " + period + " " + interval) : ""));
1259    }
1260
1261    public boolean p2pSetChannel(int lc, int oc) {
1262        if (DBG) Log.d(mTAG, "p2pSetChannel: lc="+lc+", oc="+oc);
1263
1264        synchronized (sLock) {
1265            if (lc >=1 && lc <= 11) {
1266                if (!doBooleanCommand("P2P_SET listen_channel " + lc)) {
1267                    return false;
1268                }
1269            } else if (lc != 0) {
1270                return false;
1271            }
1272
1273            if (oc >= 1 && oc <= 165 ) {
1274                int freq = (oc <= 14 ? 2407 : 5000) + oc * 5;
1275                return doBooleanCommand("P2P_SET disallow_freq 1000-"
1276                        + (freq - 5) + "," + (freq + 5) + "-6000");
1277            } else if (oc == 0) {
1278                /* oc==0 disables "P2P_SET disallow_freq" (enables all freqs) */
1279                return doBooleanCommand("P2P_SET disallow_freq \"\"");
1280            }
1281        }
1282        return false;
1283    }
1284
1285    public boolean p2pFlush() {
1286        return doBooleanCommand("P2P_FLUSH");
1287    }
1288
1289    private static final int DEFAULT_GROUP_OWNER_INTENT     = 6;
1290    /* p2p_connect <peer device address> <pbc|pin|PIN#> [label|display|keypad]
1291        [persistent] [join|auth] [go_intent=<0..15>] [freq=<in MHz>] */
1292    public String p2pConnect(WifiP2pConfig config, boolean joinExistingGroup) {
1293        if (config == null) return null;
1294        List<String> args = new ArrayList<String>();
1295        WpsInfo wps = config.wps;
1296        args.add(config.deviceAddress);
1297
1298        switch (wps.setup) {
1299            case WpsInfo.PBC:
1300                args.add("pbc");
1301                break;
1302            case WpsInfo.DISPLAY:
1303                if (TextUtils.isEmpty(wps.pin)) {
1304                    args.add("pin");
1305                } else {
1306                    args.add(wps.pin);
1307                }
1308                args.add("display");
1309                break;
1310            case WpsInfo.KEYPAD:
1311                args.add(wps.pin);
1312                args.add("keypad");
1313                break;
1314            case WpsInfo.LABEL:
1315                args.add(wps.pin);
1316                args.add("label");
1317            default:
1318                break;
1319        }
1320
1321        if (config.netId == WifiP2pGroup.PERSISTENT_NET_ID) {
1322            args.add("persistent");
1323        }
1324
1325        if (joinExistingGroup) {
1326            args.add("join");
1327        } else {
1328            //TODO: This can be adapted based on device plugged in state and
1329            //device battery state
1330            int groupOwnerIntent = config.groupOwnerIntent;
1331            if (groupOwnerIntent < 0 || groupOwnerIntent > 15) {
1332                groupOwnerIntent = DEFAULT_GROUP_OWNER_INTENT;
1333            }
1334            args.add("go_intent=" + groupOwnerIntent);
1335        }
1336
1337        String command = "P2P_CONNECT ";
1338        for (String s : args) command += s + " ";
1339
1340        return doStringCommand(command);
1341    }
1342
1343    public boolean p2pCancelConnect() {
1344        return doBooleanCommand("P2P_CANCEL");
1345    }
1346
1347    public boolean p2pProvisionDiscovery(WifiP2pConfig config) {
1348        if (config == null) return false;
1349
1350        switch (config.wps.setup) {
1351            case WpsInfo.PBC:
1352                return doBooleanCommand("P2P_PROV_DISC " + config.deviceAddress + " pbc");
1353            case WpsInfo.DISPLAY:
1354                //We are doing display, so provision discovery is keypad
1355                return doBooleanCommand("P2P_PROV_DISC " + config.deviceAddress + " keypad");
1356            case WpsInfo.KEYPAD:
1357                //We are doing keypad, so provision discovery is display
1358                return doBooleanCommand("P2P_PROV_DISC " + config.deviceAddress + " display");
1359            default:
1360                break;
1361        }
1362        return false;
1363    }
1364
1365    public boolean p2pGroupAdd(boolean persistent) {
1366        if (persistent) {
1367            return doBooleanCommand("P2P_GROUP_ADD persistent");
1368        }
1369        return doBooleanCommand("P2P_GROUP_ADD");
1370    }
1371
1372    public boolean p2pGroupAdd(int netId) {
1373        return doBooleanCommand("P2P_GROUP_ADD persistent=" + netId);
1374    }
1375
1376    public boolean p2pGroupRemove(String iface) {
1377        if (TextUtils.isEmpty(iface)) return false;
1378        synchronized (sLock) {
1379            return doBooleanCommandNative("IFNAME=" + iface + " P2P_GROUP_REMOVE " + iface);
1380        }
1381    }
1382
1383    public boolean p2pReject(String deviceAddress) {
1384        return doBooleanCommand("P2P_REJECT " + deviceAddress);
1385    }
1386
1387    /* Invite a peer to a group */
1388    public boolean p2pInvite(WifiP2pGroup group, String deviceAddress) {
1389        if (TextUtils.isEmpty(deviceAddress)) return false;
1390
1391        if (group == null) {
1392            return doBooleanCommand("P2P_INVITE peer=" + deviceAddress);
1393        } else {
1394            return doBooleanCommand("P2P_INVITE group=" + group.getInterface()
1395                    + " peer=" + deviceAddress + " go_dev_addr=" + group.getOwner().deviceAddress);
1396        }
1397    }
1398
1399    /* Reinvoke a persistent connection */
1400    public boolean p2pReinvoke(int netId, String deviceAddress) {
1401        if (TextUtils.isEmpty(deviceAddress) || netId < 0) return false;
1402
1403        return doBooleanCommand("P2P_INVITE persistent=" + netId + " peer=" + deviceAddress);
1404    }
1405
1406    public String p2pGetSsid(String deviceAddress) {
1407        return p2pGetParam(deviceAddress, "oper_ssid");
1408    }
1409
1410    public String p2pGetDeviceAddress() {
1411        Log.d(TAG, "p2pGetDeviceAddress");
1412
1413        String status = null;
1414
1415        /* Explicitly calling the API without IFNAME= prefix to take care of the devices that
1416        don't have p2p0 interface. Supplicant seems to be returning the correct address anyway. */
1417
1418        synchronized (sLock) {
1419            status = doStringCommandNative("STATUS");
1420        }
1421
1422        String result = "";
1423        if (status != null) {
1424            String[] tokens = status.split("\n");
1425            for (String token : tokens) {
1426                if (token.startsWith("p2p_device_address=")) {
1427                    String[] nameValue = token.split("=");
1428                    if (nameValue.length != 2)
1429                        break;
1430                    result = nameValue[1];
1431                }
1432            }
1433        }
1434
1435        Log.d(TAG, "p2pGetDeviceAddress returning " + result);
1436        return result;
1437    }
1438
1439    public int getGroupCapability(String deviceAddress) {
1440        int gc = 0;
1441        if (TextUtils.isEmpty(deviceAddress)) return gc;
1442        String peerInfo = p2pPeer(deviceAddress);
1443        if (TextUtils.isEmpty(peerInfo)) return gc;
1444
1445        String[] tokens = peerInfo.split("\n");
1446        for (String token : tokens) {
1447            if (token.startsWith("group_capab=")) {
1448                String[] nameValue = token.split("=");
1449                if (nameValue.length != 2) break;
1450                try {
1451                    return Integer.decode(nameValue[1]);
1452                } catch(NumberFormatException e) {
1453                    return gc;
1454                }
1455            }
1456        }
1457        return gc;
1458    }
1459
1460    public String p2pPeer(String deviceAddress) {
1461        return doStringCommand("P2P_PEER " + deviceAddress);
1462    }
1463
1464    private String p2pGetParam(String deviceAddress, String key) {
1465        if (deviceAddress == null) return null;
1466
1467        String peerInfo = p2pPeer(deviceAddress);
1468        if (peerInfo == null) return null;
1469        String[] tokens= peerInfo.split("\n");
1470
1471        key += "=";
1472        for (String token : tokens) {
1473            if (token.startsWith(key)) {
1474                String[] nameValue = token.split("=");
1475                if (nameValue.length != 2) break;
1476                return nameValue[1];
1477            }
1478        }
1479        return null;
1480    }
1481
1482    public boolean p2pServiceAdd(WifiP2pServiceInfo servInfo) {
1483        /*
1484         * P2P_SERVICE_ADD bonjour <query hexdump> <RDATA hexdump>
1485         * P2P_SERVICE_ADD upnp <version hex> <service>
1486         *
1487         * e.g)
1488         * [Bonjour]
1489         * # IP Printing over TCP (PTR) (RDATA=MyPrinter._ipp._tcp.local.)
1490         * P2P_SERVICE_ADD bonjour 045f697070c00c000c01 094d795072696e746572c027
1491         * # IP Printing over TCP (TXT) (RDATA=txtvers=1,pdl=application/postscript)
1492         * P2P_SERVICE_ADD bonjour 096d797072696e746572045f697070c00c001001
1493         *  09747874766572733d311a70646c3d6170706c69636174696f6e2f706f7374736372797074
1494         *
1495         * [UPnP]
1496         * P2P_SERVICE_ADD upnp 10 uuid:6859dede-8574-59ab-9332-123456789012
1497         * P2P_SERVICE_ADD upnp 10 uuid:6859dede-8574-59ab-9332-123456789012::upnp:rootdevice
1498         * P2P_SERVICE_ADD upnp 10 uuid:6859dede-8574-59ab-9332-123456789012::urn:schemas-upnp
1499         * -org:device:InternetGatewayDevice:1
1500         * P2P_SERVICE_ADD upnp 10 uuid:6859dede-8574-59ab-9322-123456789012::urn:schemas-upnp
1501         * -org:service:ContentDirectory:2
1502         */
1503        synchronized (sLock) {
1504            for (String s : servInfo.getSupplicantQueryList()) {
1505                String command = "P2P_SERVICE_ADD";
1506                command += (" " + s);
1507                if (!doBooleanCommand(command)) {
1508                    return false;
1509                }
1510            }
1511        }
1512        return true;
1513    }
1514
1515    public boolean p2pServiceDel(WifiP2pServiceInfo servInfo) {
1516        /*
1517         * P2P_SERVICE_DEL bonjour <query hexdump>
1518         * P2P_SERVICE_DEL upnp <version hex> <service>
1519         */
1520        synchronized (sLock) {
1521            for (String s : servInfo.getSupplicantQueryList()) {
1522                String command = "P2P_SERVICE_DEL ";
1523
1524                String[] data = s.split(" ");
1525                if (data.length < 2) {
1526                    return false;
1527                }
1528                if ("upnp".equals(data[0])) {
1529                    command += s;
1530                } else if ("bonjour".equals(data[0])) {
1531                    command += data[0];
1532                    command += (" " + data[1]);
1533                } else {
1534                    return false;
1535                }
1536                if (!doBooleanCommand(command)) {
1537                    return false;
1538                }
1539            }
1540        }
1541        return true;
1542    }
1543
1544    public boolean p2pServiceFlush() {
1545        return doBooleanCommand("P2P_SERVICE_FLUSH");
1546    }
1547
1548    public String p2pServDiscReq(String addr, String query) {
1549        String command = "P2P_SERV_DISC_REQ";
1550        command += (" " + addr);
1551        command += (" " + query);
1552
1553        return doStringCommand(command);
1554    }
1555
1556    public boolean p2pServDiscCancelReq(String id) {
1557        return doBooleanCommand("P2P_SERV_DISC_CANCEL_REQ " + id);
1558    }
1559
1560    /* Set the current mode of miracast operation.
1561     *  0 = disabled
1562     *  1 = operating as source
1563     *  2 = operating as sink
1564     */
1565    public void setMiracastMode(int mode) {
1566        // Note: optional feature on the driver. It is ok for this to fail.
1567        doBooleanCommand("DRIVER MIRACAST " + mode);
1568    }
1569
1570    public boolean fetchAnqp(String bssid, String subtypes) {
1571        return doBooleanCommand("ANQP_GET " + bssid + " " + subtypes);
1572    }
1573
1574    /*
1575     * NFC-related calls
1576     */
1577    public String getNfcWpsConfigurationToken(int netId) {
1578        return doStringCommand("WPS_NFC_CONFIG_TOKEN WPS " + netId);
1579    }
1580
1581    public String getNfcHandoverRequest() {
1582        return doStringCommand("NFC_GET_HANDOVER_REQ NDEF P2P-CR");
1583    }
1584
1585    public String getNfcHandoverSelect() {
1586        return doStringCommand("NFC_GET_HANDOVER_SEL NDEF P2P-CR");
1587    }
1588
1589    public boolean initiatorReportNfcHandover(String selectMessage) {
1590        return doBooleanCommand("NFC_REPORT_HANDOVER INIT P2P 00 " + selectMessage);
1591    }
1592
1593    public boolean responderReportNfcHandover(String requestMessage) {
1594        return doBooleanCommand("NFC_REPORT_HANDOVER RESP P2P " + requestMessage + " 00");
1595    }
1596
1597
1598    /* kernel logging support */
1599    private static native byte[] readKernelLogNative();
1600
1601    synchronized public String readKernelLog() {
1602        byte[] bytes = readKernelLogNative();
1603        if (bytes != null) {
1604            CharsetDecoder decoder = StandardCharsets.UTF_8.newDecoder();
1605            try {
1606                CharBuffer decoded = decoder.decode(ByteBuffer.wrap(bytes));
1607                return decoded.toString();
1608            } catch (CharacterCodingException cce) {
1609                return new String(bytes, StandardCharsets.ISO_8859_1);
1610            }
1611        } else {
1612            return "*** failed to read kernel log ***";
1613        }
1614    }
1615
1616    /* WIFI HAL support */
1617
1618    // HAL command ids
1619    private static int sCmdId = 1;
1620    private static int getNewCmdIdLocked() {
1621        return sCmdId++;
1622    }
1623
1624    private static final String TAG = "WifiNative-HAL";
1625    private static long sWifiHalHandle = 0;             /* used by JNI to save wifi_handle */
1626    private static long[] sWifiIfaceHandles = null;     /* used by JNI to save interface handles */
1627    public static int sWlan0Index = -1;
1628    private static int sP2p0Index = -1;
1629    private static MonitorThread sThread;
1630    private static final int STOP_HAL_TIMEOUT_MS = 1000;
1631
1632    private static native boolean startHalNative();
1633    private static native void stopHalNative();
1634    private static native void waitForHalEventNative();
1635
1636    private static class MonitorThread extends Thread {
1637        public void run() {
1638            Log.i(TAG, "Waiting for HAL events mWifiHalHandle=" + Long.toString(sWifiHalHandle));
1639            waitForHalEventNative();
1640        }
1641    }
1642
1643    public boolean startHal() {
1644        String debugLog = "startHal stack: ";
1645        java.lang.StackTraceElement[] elements = Thread.currentThread().getStackTrace();
1646        for (int i = 2; i < elements.length && i <= 7; i++ ) {
1647            debugLog = debugLog + " - " + elements[i].getMethodName();
1648        }
1649
1650        sLocalLog.log(debugLog);
1651
1652        synchronized (sLock) {
1653            if (startHalNative() && (getInterfaces() != 0) && (sWlan0Index != -1)) {
1654                sThread = new MonitorThread();
1655                sThread.start();
1656                return true;
1657            } else {
1658                if (DBG) sLocalLog.log("Could not start hal");
1659                Log.e(TAG, "Could not start hal");
1660                return false;
1661            }
1662        }
1663    }
1664
1665    public void stopHal() {
1666        synchronized (sLock) {
1667            if (isHalStarted()) {
1668                stopHalNative();
1669                try {
1670                    sThread.join(STOP_HAL_TIMEOUT_MS);
1671                    Log.d(TAG, "HAL event thread stopped successfully");
1672                } catch (InterruptedException e) {
1673                    Log.e(TAG, "Could not stop HAL cleanly");
1674                }
1675                sThread = null;
1676                sWifiHalHandle = 0;
1677                sWifiIfaceHandles = null;
1678                sWlan0Index = -1;
1679                sP2p0Index = -1;
1680            }
1681        }
1682    }
1683
1684    public boolean isHalStarted() {
1685        return (sWifiHalHandle != 0);
1686    }
1687    private static native int getInterfacesNative();
1688
1689    public int getInterfaces() {
1690        synchronized (sLock) {
1691            if (isHalStarted()) {
1692                if (sWifiIfaceHandles == null) {
1693                    int num = getInterfacesNative();
1694                    int wifi_num = 0;
1695                    for (int i = 0; i < num; i++) {
1696                        String name = getInterfaceNameNative(i);
1697                        Log.i(TAG, "interface[" + i + "] = " + name);
1698                        if (name.equals("wlan0")) {
1699                            sWlan0Index = i;
1700                            wifi_num++;
1701                        } else if (name.equals("p2p0")) {
1702                            sP2p0Index = i;
1703                            wifi_num++;
1704                        }
1705                    }
1706                    return wifi_num;
1707                } else {
1708                    return sWifiIfaceHandles.length;
1709                }
1710            } else {
1711                return 0;
1712            }
1713        }
1714    }
1715
1716    private static native String getInterfaceNameNative(int index);
1717    public String getInterfaceName(int index) {
1718        synchronized (sLock) {
1719            return getInterfaceNameNative(index);
1720        }
1721    }
1722
1723    // TODO: Change variable names to camel style.
1724    public static class ScanCapabilities {
1725        public int  max_scan_cache_size;
1726        public int  max_scan_buckets;
1727        public int  max_ap_cache_per_scan;
1728        public int  max_rssi_sample_size;
1729        public int  max_scan_reporting_threshold;
1730        public int  max_hotlist_bssids;
1731        public int  max_significant_wifi_change_aps;
1732    }
1733
1734    public boolean getScanCapabilities(ScanCapabilities capabilities) {
1735        synchronized (sLock) {
1736            return isHalStarted() && getScanCapabilitiesNative(sWlan0Index, capabilities);
1737        }
1738    }
1739
1740    private static native boolean getScanCapabilitiesNative(
1741            int iface, ScanCapabilities capabilities);
1742
1743    private static native boolean startScanNative(int iface, int id, ScanSettings settings);
1744    private static native boolean stopScanNative(int iface, int id);
1745    private static native WifiScanner.ScanData[] getScanResultsNative(int iface, boolean flush);
1746    private static native WifiLinkLayerStats getWifiLinkLayerStatsNative(int iface);
1747    private static native void setWifiLinkLayerStatsNative(int iface, int enable);
1748
1749    public static class ChannelSettings {
1750        public int frequency;
1751        public int dwell_time_ms;
1752        public boolean passive;
1753    }
1754
1755    public static class BucketSettings {
1756        public int bucket;
1757        public int band;
1758        public int period_ms;
1759        public int max_period_ms;
1760        public int step_count;
1761        public int report_events;
1762        public int num_channels;
1763        public ChannelSettings[] channels;
1764    }
1765
1766    public static class ScanSettings {
1767        public int base_period_ms;
1768        public int max_ap_per_scan;
1769        public int report_threshold_percent;
1770        public int report_threshold_num_scans;
1771        public int num_buckets;
1772        public BucketSettings[] buckets;
1773    }
1774
1775    /**
1776     * Wi-Fi channel information.
1777     */
1778    public static class WifiChannelInfo {
1779        int mPrimaryFrequency;
1780        int mCenterFrequency0;
1781        int mCenterFrequency1;
1782        int mChannelWidth;
1783        // TODO: add preamble once available in HAL.
1784    }
1785
1786    public static interface ScanEventHandler {
1787        /**
1788         * Called for each AP as it is found with the entire contents of the beacon/probe response.
1789         * Only called when WifiScanner.REPORT_EVENT_FULL_SCAN_RESULT is specified.
1790         */
1791        void onFullScanResult(ScanResult fullScanResult);
1792        /**
1793         * Callback on an event during a gscan scan.
1794         * See WifiNative.WIFI_SCAN_* for possible values.
1795         */
1796        void onScanStatus(int event);
1797        /**
1798         * Called with the current cached scan results when gscan is paused.
1799         */
1800        void onScanPaused(WifiScanner.ScanData[] data);
1801        /**
1802         * Called with the current cached scan results when gscan is resumed.
1803         */
1804        void onScanRestarted();
1805    }
1806
1807    /* scan status, keep these values in sync with gscan.h */
1808    public static final int WIFI_SCAN_RESULTS_AVAILABLE = 0;
1809    public static final int WIFI_SCAN_THRESHOLD_NUM_SCANS = 1;
1810    public static final int WIFI_SCAN_THRESHOLD_PERCENT = 2;
1811    public static final int WIFI_SCAN_FAILED = 3;
1812
1813    // Callback from native
1814    private static void onScanStatus(int id, int event) {
1815        ScanEventHandler handler = sScanEventHandler;
1816        if (handler != null) {
1817            handler.onScanStatus(event);
1818        }
1819    }
1820
1821    public static  WifiSsid createWifiSsid(byte[] rawSsid) {
1822        String ssidHexString = String.valueOf(HexEncoding.encode(rawSsid));
1823
1824        if (ssidHexString == null) {
1825            return null;
1826        }
1827
1828        WifiSsid wifiSsid = WifiSsid.createFromHex(ssidHexString);
1829
1830        return wifiSsid;
1831    }
1832
1833    public static String ssidConvert(byte[] rawSsid) {
1834        String ssid;
1835
1836        CharsetDecoder decoder = StandardCharsets.UTF_8.newDecoder();
1837        try {
1838            CharBuffer decoded = decoder.decode(ByteBuffer.wrap(rawSsid));
1839            ssid = decoded.toString();
1840        } catch (CharacterCodingException cce) {
1841            ssid = null;
1842        }
1843
1844        if (ssid == null) {
1845            ssid = new String(rawSsid, StandardCharsets.ISO_8859_1);
1846        }
1847
1848        return ssid;
1849    }
1850
1851    // Called from native
1852    public static boolean setSsid(byte[] rawSsid, ScanResult result) {
1853        if (rawSsid == null || rawSsid.length == 0 || result == null) {
1854            return false;
1855        }
1856
1857        result.SSID = ssidConvert(rawSsid);
1858        result.wifiSsid = createWifiSsid(rawSsid);
1859        return true;
1860    }
1861
1862    private static void populateScanResult(ScanResult result, int beaconCap, String dbg) {
1863        if (dbg == null) dbg = "";
1864
1865        InformationElementUtil.HtOperation htOperation = new InformationElementUtil.HtOperation();
1866        InformationElementUtil.VhtOperation vhtOperation =
1867                new InformationElementUtil.VhtOperation();
1868        InformationElementUtil.ExtendedCapabilities extendedCaps =
1869                new InformationElementUtil.ExtendedCapabilities();
1870
1871        ScanResult.InformationElement elements[] =
1872                InformationElementUtil.parseInformationElements(result.bytes);
1873        for (ScanResult.InformationElement ie : elements) {
1874            if(ie.id == ScanResult.InformationElement.EID_HT_OPERATION) {
1875                htOperation.from(ie);
1876            } else if(ie.id == ScanResult.InformationElement.EID_VHT_OPERATION) {
1877                vhtOperation.from(ie);
1878            } else if (ie.id == ScanResult.InformationElement.EID_EXTENDED_CAPS) {
1879                extendedCaps.from(ie);
1880            }
1881        }
1882
1883        if (extendedCaps.is80211McRTTResponder) {
1884            result.setFlag(ScanResult.FLAG_80211mc_RESPONDER);
1885        } else {
1886            result.clearFlag(ScanResult.FLAG_80211mc_RESPONDER);
1887        }
1888
1889        //handle RTT related information
1890        if (vhtOperation.isValid()) {
1891            result.channelWidth = vhtOperation.getChannelWidth();
1892            result.centerFreq0 = vhtOperation.getCenterFreq0();
1893            result.centerFreq1 = vhtOperation.getCenterFreq1();
1894        } else {
1895            result.channelWidth = htOperation.getChannelWidth();
1896            result.centerFreq0 = htOperation.getCenterFreq0(result.frequency);
1897            result.centerFreq1  = 0;
1898        }
1899
1900        // build capabilities string
1901        BitSet beaconCapBits = new BitSet(16);
1902        for (int i = 0; i < 16; i++) {
1903            if ((beaconCap & (1 << i)) != 0) {
1904                beaconCapBits.set(i);
1905            }
1906        }
1907        result.capabilities = InformationElementUtil.Capabilities.buildCapabilities(elements,
1908                                               beaconCapBits);
1909
1910        if(DBG) {
1911            Log.d(TAG, dbg + "SSID: " + result.SSID + " ChannelWidth is: " + result.channelWidth
1912                    + " PrimaryFreq: " + result.frequency + " mCenterfreq0: " + result.centerFreq0
1913                    + " mCenterfreq1: " + result.centerFreq1 + (extendedCaps.is80211McRTTResponder
1914                    ? "Support RTT reponder: " : "Do not support RTT responder")
1915                    + " Capabilities: " + result.capabilities);
1916        }
1917
1918        result.informationElements = elements;
1919    }
1920
1921    // Callback from native
1922    private static void onFullScanResult(int id, ScanResult result,
1923            int bucketsScanned, int beaconCap) {
1924        if (DBG) Log.i(TAG, "Got a full scan results event, ssid = " + result.SSID);
1925
1926        ScanEventHandler handler = sScanEventHandler;
1927        if (handler != null) {
1928            populateScanResult(result, beaconCap, " onFullScanResult ");
1929            handler.onFullScanResult(result);
1930        }
1931    }
1932
1933    private static int sScanCmdId = 0;
1934    private static ScanEventHandler sScanEventHandler;
1935    private static ScanSettings sScanSettings;
1936
1937    public boolean startScan(ScanSettings settings, ScanEventHandler eventHandler) {
1938        synchronized (sLock) {
1939            if (isHalStarted()) {
1940                if (sScanCmdId != 0) {
1941                    stopScan();
1942                } else if (sScanSettings != null || sScanEventHandler != null) {
1943                /* current scan is paused; no need to stop it */
1944                }
1945
1946                sScanCmdId = getNewCmdIdLocked();
1947
1948                sScanSettings = settings;
1949                sScanEventHandler = eventHandler;
1950
1951                if (startScanNative(sWlan0Index, sScanCmdId, settings) == false) {
1952                    sScanEventHandler = null;
1953                    sScanSettings = null;
1954                    sScanCmdId = 0;
1955                    return false;
1956                }
1957
1958                return true;
1959            } else {
1960                return false;
1961            }
1962        }
1963    }
1964
1965    public void stopScan() {
1966        synchronized (sLock) {
1967            if (isHalStarted()) {
1968                if (sScanCmdId != 0) {
1969                    stopScanNative(sWlan0Index, sScanCmdId);
1970                }
1971                sScanSettings = null;
1972                sScanEventHandler = null;
1973                sScanCmdId = 0;
1974            }
1975        }
1976    }
1977
1978    public void pauseScan() {
1979        synchronized (sLock) {
1980            if (isHalStarted()) {
1981                if (sScanCmdId != 0 && sScanSettings != null && sScanEventHandler != null) {
1982                    Log.d(TAG, "Pausing scan");
1983                    WifiScanner.ScanData scanData[] = getScanResultsNative(sWlan0Index, true);
1984                    stopScanNative(sWlan0Index, sScanCmdId);
1985                    sScanCmdId = 0;
1986                    sScanEventHandler.onScanPaused(scanData);
1987                }
1988            }
1989        }
1990    }
1991
1992    public void restartScan() {
1993        synchronized (sLock) {
1994            if (isHalStarted()) {
1995                if (sScanCmdId == 0 && sScanSettings != null && sScanEventHandler != null) {
1996                    Log.d(TAG, "Restarting scan");
1997                    ScanEventHandler handler = sScanEventHandler;
1998                    ScanSettings settings = sScanSettings;
1999                    if (startScan(sScanSettings, sScanEventHandler)) {
2000                        sScanEventHandler.onScanRestarted();
2001                    } else {
2002                    /* we are still paused; don't change state */
2003                        sScanEventHandler = handler;
2004                        sScanSettings = settings;
2005                    }
2006                }
2007            }
2008        }
2009    }
2010
2011    public WifiScanner.ScanData[] getScanResults(boolean flush) {
2012        synchronized (sLock) {
2013            WifiScanner.ScanData[] sd = null;
2014            if (isHalStarted()) {
2015                sd = getScanResultsNative(sWlan0Index, flush);
2016            }
2017
2018            if (sd != null) {
2019                return sd;
2020            } else {
2021                return new WifiScanner.ScanData[0];
2022            }
2023        }
2024    }
2025
2026    public static interface HotlistEventHandler {
2027        void onHotlistApFound (ScanResult[] result);
2028        void onHotlistApLost  (ScanResult[] result);
2029    }
2030
2031    private static int sHotlistCmdId = 0;
2032    private static HotlistEventHandler sHotlistEventHandler;
2033
2034    private native static boolean setHotlistNative(int iface, int id,
2035            WifiScanner.HotlistSettings settings);
2036    private native static boolean resetHotlistNative(int iface, int id);
2037
2038    public boolean setHotlist(WifiScanner.HotlistSettings settings,
2039            HotlistEventHandler eventHandler) {
2040        synchronized (sLock) {
2041            if (isHalStarted()) {
2042                if (sHotlistCmdId != 0) {
2043                    return false;
2044                } else {
2045                    sHotlistCmdId = getNewCmdIdLocked();
2046                }
2047
2048                sHotlistEventHandler = eventHandler;
2049                if (setHotlistNative(sWlan0Index, sHotlistCmdId, settings) == false) {
2050                    sHotlistEventHandler = null;
2051                    return false;
2052                }
2053
2054                return true;
2055            } else {
2056                return false;
2057            }
2058        }
2059    }
2060
2061    public void resetHotlist() {
2062        synchronized (sLock) {
2063            if (isHalStarted()) {
2064                if (sHotlistCmdId != 0) {
2065                    resetHotlistNative(sWlan0Index, sHotlistCmdId);
2066                    sHotlistCmdId = 0;
2067                    sHotlistEventHandler = null;
2068                }
2069            }
2070        }
2071    }
2072
2073    // Callback from native
2074    private static void onHotlistApFound(int id, ScanResult[] results) {
2075        HotlistEventHandler handler = sHotlistEventHandler;
2076        if (handler != null) {
2077            handler.onHotlistApFound(results);
2078        } else {
2079            /* this can happen because of race conditions */
2080            Log.d(TAG, "Ignoring hotlist AP found event");
2081        }
2082    }
2083
2084    // Callback from native
2085    private static void onHotlistApLost(int id, ScanResult[] results) {
2086        HotlistEventHandler handler = sHotlistEventHandler;
2087        if (handler != null) {
2088            handler.onHotlistApLost(results);
2089        } else {
2090            /* this can happen because of race conditions */
2091            Log.d(TAG, "Ignoring hotlist AP lost event");
2092        }
2093    }
2094
2095    public static interface SignificantWifiChangeEventHandler {
2096        void onChangesFound(ScanResult[] result);
2097    }
2098
2099    private static SignificantWifiChangeEventHandler sSignificantWifiChangeHandler;
2100    private static int sSignificantWifiChangeCmdId;
2101
2102    private static native boolean trackSignificantWifiChangeNative(
2103            int iface, int id, WifiScanner.WifiChangeSettings settings);
2104    private static native boolean untrackSignificantWifiChangeNative(int iface, int id);
2105
2106    public boolean trackSignificantWifiChange(
2107            WifiScanner.WifiChangeSettings settings, SignificantWifiChangeEventHandler handler) {
2108        synchronized (sLock) {
2109            if (isHalStarted()) {
2110                if (sSignificantWifiChangeCmdId != 0) {
2111                    return false;
2112                } else {
2113                    sSignificantWifiChangeCmdId = getNewCmdIdLocked();
2114                }
2115
2116                sSignificantWifiChangeHandler = handler;
2117                if (trackSignificantWifiChangeNative(sWlan0Index, sSignificantWifiChangeCmdId,
2118                        settings) == false) {
2119                    sSignificantWifiChangeHandler = null;
2120                    return false;
2121                }
2122
2123                return true;
2124            } else {
2125                return false;
2126            }
2127
2128        }
2129    }
2130
2131    public void untrackSignificantWifiChange() {
2132        synchronized (sLock) {
2133            if (isHalStarted()) {
2134                if (sSignificantWifiChangeCmdId != 0) {
2135                    untrackSignificantWifiChangeNative(sWlan0Index, sSignificantWifiChangeCmdId);
2136                    sSignificantWifiChangeCmdId = 0;
2137                    sSignificantWifiChangeHandler = null;
2138                }
2139            }
2140        }
2141    }
2142
2143    // Callback from native
2144    private static void onSignificantWifiChange(int id, ScanResult[] results) {
2145        SignificantWifiChangeEventHandler handler = sSignificantWifiChangeHandler;
2146        if (handler != null) {
2147            handler.onChangesFound(results);
2148        } else {
2149            /* this can happen because of race conditions */
2150            Log.d(TAG, "Ignoring significant wifi change");
2151        }
2152    }
2153
2154    public WifiLinkLayerStats getWifiLinkLayerStats(String iface) {
2155        // TODO: use correct iface name to Index translation
2156        if (iface == null) return null;
2157        synchronized (sLock) {
2158            if (isHalStarted()) {
2159                return getWifiLinkLayerStatsNative(sWlan0Index);
2160            } else {
2161                return null;
2162            }
2163        }
2164    }
2165
2166    public void setWifiLinkLayerStats(String iface, int enable) {
2167        if (iface == null) return;
2168        synchronized (sLock) {
2169            if (isHalStarted()) {
2170                setWifiLinkLayerStatsNative(sWlan0Index, enable);
2171            }
2172        }
2173    }
2174
2175    public static native int getSupportedFeatureSetNative(int iface);
2176    public int getSupportedFeatureSet() {
2177        synchronized (sLock) {
2178            if (isHalStarted()) {
2179                return getSupportedFeatureSetNative(sWlan0Index);
2180            } else {
2181                Log.d(TAG, "Failing getSupportedFeatureset because HAL isn't started");
2182                return 0;
2183            }
2184        }
2185    }
2186
2187    /* Rtt related commands/events */
2188    public static interface RttEventHandler {
2189        void onRttResults(RttManager.RttResult[] result);
2190    }
2191
2192    private static RttEventHandler sRttEventHandler;
2193    private static int sRttCmdId;
2194
2195    // Callback from native
2196    private static void onRttResults(int id, RttManager.RttResult[] results) {
2197        RttEventHandler handler = sRttEventHandler;
2198        if (handler != null && id == sRttCmdId) {
2199            Log.d(TAG, "Received " + results.length + " rtt results");
2200            handler.onRttResults(results);
2201            sRttCmdId = 0;
2202        } else {
2203            Log.d(TAG, "RTT Received event for unknown cmd = " + id +
2204                    ", current id = " + sRttCmdId);
2205        }
2206    }
2207
2208    private static native boolean requestRangeNative(
2209            int iface, int id, RttManager.RttParams[] params);
2210    private static native boolean cancelRangeRequestNative(
2211            int iface, int id, RttManager.RttParams[] params);
2212
2213    public boolean requestRtt(
2214            RttManager.RttParams[] params, RttEventHandler handler) {
2215        synchronized (sLock) {
2216            if (isHalStarted()) {
2217                if (sRttCmdId != 0) {
2218                    Log.v("TAG", "Last one is still under measurement!");
2219                    return false;
2220                } else {
2221                    sRttCmdId = getNewCmdIdLocked();
2222                }
2223                sRttEventHandler = handler;
2224                Log.v(TAG, "native issue RTT request");
2225                return requestRangeNative(sWlan0Index, sRttCmdId, params);
2226            } else {
2227                return false;
2228            }
2229        }
2230    }
2231
2232    public boolean cancelRtt(RttManager.RttParams[] params) {
2233        synchronized (sLock) {
2234            if (isHalStarted()) {
2235                if (sRttCmdId == 0) {
2236                    return false;
2237                }
2238
2239                sRttCmdId = 0;
2240
2241                if (cancelRangeRequestNative(sWlan0Index, sRttCmdId, params)) {
2242                    sRttEventHandler = null;
2243                    Log.v(TAG, "RTT cancel Request Successfully");
2244                    return true;
2245                } else {
2246                    Log.e(TAG, "RTT cancel Request failed");
2247                    return false;
2248                }
2249            } else {
2250                return false;
2251            }
2252        }
2253    }
2254
2255    private static int sRttResponderCmdId = 0;
2256
2257    private static native ResponderConfig enableRttResponderNative(int iface, int commandId,
2258            int timeoutSeconds, WifiChannelInfo channelHint);
2259    /**
2260     * Enable RTT responder role on the device. Returns {@link ResponderConfig} if the responder
2261     * role is successfully enabled, {@code null} otherwise.
2262     */
2263    @Nullable
2264    public ResponderConfig enableRttResponder(int timeoutSeconds) {
2265        synchronized (sLock) {
2266            if (!isHalStarted()) return null;
2267            if (sRttResponderCmdId != 0) {
2268                if (DBG) Log.e(mTAG, "responder mode already enabled - this shouldn't happen");
2269                return null;
2270            }
2271            int id = getNewCmdIdLocked();
2272            ResponderConfig config = enableRttResponderNative(
2273                    sWlan0Index, id, timeoutSeconds, null);
2274            if (config != null) sRttResponderCmdId = id;
2275            if (DBG) Log.d(TAG, "enabling rtt " + (config != null));
2276            return config;
2277        }
2278    }
2279
2280    private static native boolean disableRttResponderNative(int iface, int commandId);
2281    /**
2282     * Disable RTT responder role. Returns {@code true} if responder role is successfully disabled,
2283     * {@code false} otherwise.
2284     */
2285    public boolean disableRttResponder() {
2286        synchronized (sLock) {
2287            if (!isHalStarted()) return false;
2288            if (sRttResponderCmdId == 0) {
2289                Log.e(mTAG, "responder role not enabled yet");
2290                return true;
2291            }
2292            sRttResponderCmdId = 0;
2293            return disableRttResponderNative(sWlan0Index, sRttResponderCmdId);
2294        }
2295    }
2296
2297    private static native boolean setScanningMacOuiNative(int iface, byte[] oui);
2298
2299    public boolean setScanningMacOui(byte[] oui) {
2300        synchronized (sLock) {
2301            if (isHalStarted()) {
2302                return setScanningMacOuiNative(sWlan0Index, oui);
2303            } else {
2304                return false;
2305            }
2306        }
2307    }
2308
2309    private static native int[] getChannelsForBandNative(
2310            int iface, int band);
2311
2312    public int [] getChannelsForBand(int band) {
2313        synchronized (sLock) {
2314            if (isHalStarted()) {
2315                return getChannelsForBandNative(sWlan0Index, band);
2316            } else {
2317                return null;
2318            }
2319        }
2320    }
2321
2322    private static native boolean isGetChannelsForBandSupportedNative();
2323    public boolean isGetChannelsForBandSupported(){
2324        synchronized (sLock) {
2325            if (isHalStarted()) {
2326                return isGetChannelsForBandSupportedNative();
2327            } else {
2328                return false;
2329            }
2330        }
2331    }
2332
2333    private static native boolean setDfsFlagNative(int iface, boolean dfsOn);
2334    public boolean setDfsFlag(boolean dfsOn) {
2335        synchronized (sLock) {
2336            if (isHalStarted()) {
2337                return setDfsFlagNative(sWlan0Index, dfsOn);
2338            } else {
2339                return false;
2340            }
2341        }
2342    }
2343
2344    private static native boolean toggleInterfaceNative(int on);
2345    public boolean toggleInterface(int on) {
2346        synchronized (sLock) {
2347            if (isHalStarted()) {
2348                return toggleInterfaceNative(on);
2349            } else {
2350                return false;
2351            }
2352        }
2353    }
2354
2355    private static native RttManager.RttCapabilities getRttCapabilitiesNative(int iface);
2356    public RttManager.RttCapabilities getRttCapabilities() {
2357        synchronized (sLock) {
2358            if (isHalStarted()) {
2359                return getRttCapabilitiesNative(sWlan0Index);
2360            } else {
2361                return null;
2362            }
2363        }
2364    }
2365
2366    private static native boolean setCountryCodeHalNative(int iface, String CountryCode);
2367    public boolean setCountryCodeHal(String CountryCode) {
2368        synchronized (sLock) {
2369            if (isHalStarted()) {
2370                return setCountryCodeHalNative(sWlan0Index, CountryCode);
2371            } else {
2372                return false;
2373            }
2374        }
2375    }
2376
2377    /* Rtt related commands/events */
2378    public abstract class TdlsEventHandler {
2379        abstract public void onTdlsStatus(String macAddr, int status, int reason);
2380    }
2381
2382    private static TdlsEventHandler sTdlsEventHandler;
2383
2384    private static native boolean enableDisableTdlsNative(int iface, boolean enable,
2385            String macAddr);
2386    public boolean enableDisableTdls(boolean enable, String macAdd, TdlsEventHandler tdlsCallBack) {
2387        synchronized (sLock) {
2388            sTdlsEventHandler = tdlsCallBack;
2389            return enableDisableTdlsNative(sWlan0Index, enable, macAdd);
2390        }
2391    }
2392
2393    // Once TDLS per mac and event feature is implemented, this class definition should be
2394    // moved to the right place, like WifiManager etc
2395    public static class TdlsStatus {
2396        int channel;
2397        int global_operating_class;
2398        int state;
2399        int reason;
2400    }
2401    private static native TdlsStatus getTdlsStatusNative(int iface, String macAddr);
2402    public TdlsStatus getTdlsStatus(String macAdd) {
2403        synchronized (sLock) {
2404            if (isHalStarted()) {
2405                return getTdlsStatusNative(sWlan0Index, macAdd);
2406            } else {
2407                return null;
2408            }
2409        }
2410    }
2411
2412    //ToFix: Once TDLS per mac and event feature is implemented, this class definition should be
2413    // moved to the right place, like WifiStateMachine etc
2414    public static class TdlsCapabilities {
2415        /* Maximum TDLS session number can be supported by the Firmware and hardware */
2416        int maxConcurrentTdlsSessionNumber;
2417        boolean isGlobalTdlsSupported;
2418        boolean isPerMacTdlsSupported;
2419        boolean isOffChannelTdlsSupported;
2420    }
2421
2422
2423
2424    private static native TdlsCapabilities getTdlsCapabilitiesNative(int iface);
2425    public TdlsCapabilities getTdlsCapabilities () {
2426        synchronized (sLock) {
2427            if (isHalStarted()) {
2428                return getTdlsCapabilitiesNative(sWlan0Index);
2429            } else {
2430                return null;
2431            }
2432        }
2433    }
2434
2435    private static boolean onTdlsStatus(String macAddr, int status, int reason) {
2436        TdlsEventHandler handler = sTdlsEventHandler;
2437        if (handler == null) {
2438            return false;
2439        } else {
2440            handler.onTdlsStatus(macAddr, status, reason);
2441            return true;
2442        }
2443    }
2444
2445    //---------------------------------------------------------------------------------
2446
2447    /* Wifi Logger commands/events */
2448
2449    public static interface WifiLoggerEventHandler {
2450        void onRingBufferData(RingBufferStatus status, byte[] buffer);
2451        void onWifiAlert(int errorCode, byte[] buffer);
2452    }
2453
2454    private static WifiLoggerEventHandler sWifiLoggerEventHandler = null;
2455
2456    // Callback from native
2457    private static void onRingBufferData(RingBufferStatus status, byte[] buffer) {
2458        WifiLoggerEventHandler handler = sWifiLoggerEventHandler;
2459        if (handler != null)
2460            handler.onRingBufferData(status, buffer);
2461    }
2462
2463    // Callback from native
2464    private static void onWifiAlert(byte[] buffer, int errorCode) {
2465        WifiLoggerEventHandler handler = sWifiLoggerEventHandler;
2466        if (handler != null)
2467            handler.onWifiAlert(errorCode, buffer);
2468    }
2469
2470    private static int sLogCmdId = -1;
2471    private static native boolean setLoggingEventHandlerNative(int iface, int id);
2472    public boolean setLoggingEventHandler(WifiLoggerEventHandler handler) {
2473        synchronized (sLock) {
2474            if (isHalStarted()) {
2475                int oldId =  sLogCmdId;
2476                sLogCmdId = getNewCmdIdLocked();
2477                if (!setLoggingEventHandlerNative(sWlan0Index, sLogCmdId)) {
2478                    sLogCmdId = oldId;
2479                    return false;
2480                }
2481                sWifiLoggerEventHandler = handler;
2482                return true;
2483            } else {
2484                return false;
2485            }
2486        }
2487    }
2488
2489    private static native boolean startLoggingRingBufferNative(int iface, int verboseLevel,
2490            int flags, int minIntervalSec ,int minDataSize, String ringName);
2491    public boolean startLoggingRingBuffer(int verboseLevel, int flags, int maxInterval,
2492            int minDataSize, String ringName){
2493        synchronized (sLock) {
2494            if (isHalStarted()) {
2495                return startLoggingRingBufferNative(sWlan0Index, verboseLevel, flags, maxInterval,
2496                        minDataSize, ringName);
2497            } else {
2498                return false;
2499            }
2500        }
2501    }
2502
2503    private static native int getSupportedLoggerFeatureSetNative(int iface);
2504    public int getSupportedLoggerFeatureSet() {
2505        synchronized (sLock) {
2506            if (isHalStarted()) {
2507                return getSupportedLoggerFeatureSetNative(sWlan0Index);
2508            } else {
2509                return 0;
2510            }
2511        }
2512    }
2513
2514    private static native boolean resetLogHandlerNative(int iface, int id);
2515    public boolean resetLogHandler() {
2516        synchronized (sLock) {
2517            if (isHalStarted()) {
2518                if (sLogCmdId == -1) {
2519                    Log.e(TAG,"Can not reset handler Before set any handler");
2520                    return false;
2521                }
2522                sWifiLoggerEventHandler = null;
2523                if (resetLogHandlerNative(sWlan0Index, sLogCmdId)) {
2524                    sLogCmdId = -1;
2525                    return true;
2526                } else {
2527                    return false;
2528                }
2529            } else {
2530                return false;
2531            }
2532        }
2533    }
2534
2535    private static native String getDriverVersionNative(int iface);
2536    public String getDriverVersion() {
2537        synchronized (sLock) {
2538            if (isHalStarted()) {
2539                return getDriverVersionNative(sWlan0Index);
2540            } else {
2541                return "";
2542            }
2543        }
2544    }
2545
2546
2547    private static native String getFirmwareVersionNative(int iface);
2548    public String getFirmwareVersion() {
2549        synchronized (sLock) {
2550            if (isHalStarted()) {
2551                return getFirmwareVersionNative(sWlan0Index);
2552            } else {
2553                return "";
2554            }
2555        }
2556    }
2557
2558    public static class RingBufferStatus{
2559        String name;
2560        int flag;
2561        int ringBufferId;
2562        int ringBufferByteSize;
2563        int verboseLevel;
2564        int writtenBytes;
2565        int readBytes;
2566        int writtenRecords;
2567
2568        @Override
2569        public String toString() {
2570            return "name: " + name + " flag: " + flag + " ringBufferId: " + ringBufferId +
2571                    " ringBufferByteSize: " +ringBufferByteSize + " verboseLevel: " +verboseLevel +
2572                    " writtenBytes: " + writtenBytes + " readBytes: " + readBytes +
2573                    " writtenRecords: " + writtenRecords;
2574        }
2575    }
2576
2577    private static native RingBufferStatus[] getRingBufferStatusNative(int iface);
2578    public RingBufferStatus[] getRingBufferStatus() {
2579        synchronized (sLock) {
2580            if (isHalStarted()) {
2581                return getRingBufferStatusNative(sWlan0Index);
2582            } else {
2583                return null;
2584            }
2585        }
2586    }
2587
2588    private static native boolean getRingBufferDataNative(int iface, String ringName);
2589    public boolean getRingBufferData(String ringName) {
2590        synchronized (sLock) {
2591            if (isHalStarted()) {
2592                return getRingBufferDataNative(sWlan0Index, ringName);
2593            } else {
2594                return false;
2595            }
2596        }
2597    }
2598
2599    private static byte[] mFwMemoryDump;
2600    // Callback from native
2601    private static void onWifiFwMemoryAvailable(byte[] buffer) {
2602        mFwMemoryDump = buffer;
2603        if (DBG) {
2604            Log.d(TAG, "onWifiFwMemoryAvailable is called and buffer length is: " +
2605                    (buffer == null ? 0 :  buffer.length));
2606        }
2607    }
2608
2609    private static native boolean getFwMemoryDumpNative(int iface);
2610    public byte[] getFwMemoryDump() {
2611        synchronized (sLock) {
2612            if (isHalStarted()) {
2613                if(getFwMemoryDumpNative(sWlan0Index)) {
2614                    byte[] fwMemoryDump = mFwMemoryDump;
2615                    mFwMemoryDump = null;
2616                    return fwMemoryDump;
2617                } else {
2618                    return null;
2619                }
2620            }
2621            return null;
2622        }
2623    }
2624
2625    //---------------------------------------------------------------------------------
2626    /* Configure ePNO/PNO */
2627
2628    /* pno flags, keep these values in sync with gscan.h */
2629    private static int WIFI_PNO_AUTH_CODE_OPEN  = 1; // open
2630    private static int WIFI_PNO_AUTH_CODE_PSK   = 2; // WPA_PSK or WPA2PSK
2631    private static int WIFI_PNO_AUTH_CODE_EAPOL = 4; // any EAPOL
2632
2633    // Whether directed scan needs to be performed (for hidden SSIDs)
2634    private static int WIFI_PNO_FLAG_DIRECTED_SCAN = 1;
2635    // Whether PNO event shall be triggered if the network is found on A band
2636    private static int WIFI_PNO_FLAG_A_BAND = 2;
2637    // Whether PNO event shall be triggered if the network is found on G band
2638    private static int WIFI_PNO_FLAG_G_BAND = 4;
2639    // Whether strict matching is required (i.e. firmware shall not match on the entire SSID)
2640    private static int WIFI_PNO_FLAG_STRICT_MATCH = 8;
2641
2642    /**
2643     * Object holding the network ID and the corresponding priority to be set before enabling/
2644     * disabling PNO.
2645     */
2646    public static class WifiPnoNetwork {
2647        public String SSID;
2648        public int rssi_threshold; // TODO remove
2649        public int flags;
2650        public int auth;
2651        public String configKey; // kept for reference
2652        public int networkId;
2653        public int priority;
2654
2655        WifiPnoNetwork(WifiConfiguration config, int threshold, int newPriority) {
2656            if (config.SSID == null) {
2657                SSID = "";
2658                flags = WIFI_PNO_FLAG_DIRECTED_SCAN;
2659            } else {
2660                SSID = config.SSID;
2661            }
2662            rssi_threshold = threshold;
2663            if (config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.WPA_PSK)) {
2664                auth |= WIFI_PNO_AUTH_CODE_PSK;
2665            } else if (config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.WPA_EAP) ||
2666                    config.allowedKeyManagement.get(WifiConfiguration.KeyMgmt.IEEE8021X)) {
2667                auth |= WIFI_PNO_AUTH_CODE_EAPOL;
2668            } else {
2669                auth |= WIFI_PNO_AUTH_CODE_OPEN;
2670            }
2671            flags |= WIFI_PNO_FLAG_A_BAND | WIFI_PNO_FLAG_G_BAND;
2672            configKey = config.configKey();
2673            networkId = config.networkId;
2674            priority = newPriority;
2675        }
2676
2677        @Override
2678        public String toString() {
2679            StringBuilder sbuf = new StringBuilder();
2680            sbuf.append(this.SSID);
2681            sbuf.append(" flags=").append(this.flags);
2682            sbuf.append(" rssi=").append(this.rssi_threshold);
2683            sbuf.append(" auth=").append(this.auth);
2684            sbuf.append(" Network ID=").append(this.networkId);
2685            sbuf.append(" Priority=").append(this.priority);
2686            return sbuf.toString();
2687        }
2688    }
2689
2690    public static interface WifiPnoEventHandler {
2691        void onPnoNetworkFound(ScanResult results[]);
2692    }
2693
2694    private static WifiPnoEventHandler sWifiPnoEventHandler;
2695
2696    private static int sPnoCmdId = 0;
2697
2698    private native static boolean setPnoListNative(int iface, int id, WifiPnoNetwork list[]);
2699
2700    public boolean setPnoList(WifiPnoNetwork list[],
2701                                                  WifiPnoEventHandler eventHandler) {
2702        Log.e(TAG, "setPnoList cmd " + sPnoCmdId);
2703
2704        synchronized (sLock) {
2705            if (isHalStarted()) {
2706
2707                sPnoCmdId = getNewCmdIdLocked();
2708
2709                sWifiPnoEventHandler = eventHandler;
2710                if (setPnoListNative(sWlan0Index, sPnoCmdId, list)) {
2711                    return true;
2712                }
2713            }
2714
2715            sWifiPnoEventHandler = null;
2716            return false;
2717        }
2718    }
2719
2720    // Callback from native
2721    private static void onPnoNetworkFound(int id, ScanResult[] results, int[] beaconCaps) {
2722        if (results == null) {
2723            Log.e(TAG, "onPnoNetworkFound null results");
2724            return;
2725
2726        }
2727        Log.d(TAG, "WifiNative.onPnoNetworkFound result " + results.length);
2728
2729        WifiPnoEventHandler handler = sWifiPnoEventHandler;
2730        if (sPnoCmdId != 0 && handler != null) {
2731            for (int i=0; i<results.length; i++) {
2732                Log.e(TAG, "onPnoNetworkFound SSID " + results[i].SSID
2733                        + " " + results[i].level + " " + results[i].frequency);
2734
2735                populateScanResult(results[i], beaconCaps[i], "onPnoNetworkFound ");
2736                results[i].wifiSsid = WifiSsid.createFromAsciiEncoded(results[i].SSID);
2737            }
2738
2739            handler.onPnoNetworkFound(results);
2740        } else {
2741            /* this can happen because of race conditions */
2742            Log.d(TAG, "Ignoring Pno Network found event");
2743        }
2744    }
2745
2746    // TODO remove
2747    public static class WifiLazyRoamParams {
2748        int A_band_boost_threshold;
2749        int A_band_penalty_threshold;
2750        int A_band_boost_factor;
2751        int A_band_penalty_factor;
2752        int A_band_max_boost;
2753        int lazy_roam_hysteresis;
2754        int alert_roam_rssi_trigger;
2755
2756        WifiLazyRoamParams() {
2757        }
2758
2759        @Override
2760        public String toString() {
2761            StringBuilder sbuf = new StringBuilder();
2762            sbuf.append(" A_band_boost_threshold=").append(this.A_band_boost_threshold);
2763            sbuf.append(" A_band_penalty_threshold=").append(this.A_band_penalty_threshold);
2764            sbuf.append(" A_band_boost_factor=").append(this.A_band_boost_factor);
2765            sbuf.append(" A_band_penalty_factor=").append(this.A_band_penalty_factor);
2766            sbuf.append(" A_band_max_boost=").append(this.A_band_max_boost);
2767            sbuf.append(" lazy_roam_hysteresis=").append(this.lazy_roam_hysteresis);
2768            sbuf.append(" alert_roam_rssi_trigger=").append(this.alert_roam_rssi_trigger);
2769            return sbuf.toString();
2770        }
2771    }
2772
2773    // TODO remove
2774    public boolean setLazyRoam(boolean enabled, WifiLazyRoamParams params) {
2775        return false;
2776    }
2777
2778    private native static boolean setBssidBlacklistNative(int iface, int id,
2779                                              String list[]);
2780
2781    public boolean setBssidBlacklist(String list[]) {
2782        int size = 0;
2783        if (list != null) {
2784            size = list.length;
2785        }
2786        Log.e(TAG, "setBssidBlacklist cmd " + sPnoCmdId + " size " + size);
2787
2788        synchronized (sLock) {
2789            if (isHalStarted()) {
2790                sPnoCmdId = getNewCmdIdLocked();
2791                return setBssidBlacklistNative(sWlan0Index, sPnoCmdId, list);
2792            } else {
2793                return false;
2794            }
2795        }
2796    }
2797
2798    // TODO remove
2799    public boolean setSsidWhitelist(String list[]) {
2800        return false;
2801    }
2802
2803    private native static int startSendingOffloadedPacketNative(int iface, int idx,
2804                                    byte[] srcMac, byte[] dstMac, byte[] pktData, int period);
2805
2806    public int
2807    startSendingOffloadedPacket(int slot, KeepalivePacketData keepAlivePacket, int period) {
2808        Log.d(TAG, "startSendingOffloadedPacket slot=" + slot + " period=" + period);
2809
2810        String[] macAddrStr = getMacAddress().split(":");
2811        byte[] srcMac = new byte[6];
2812        for(int i = 0; i < 6; i++) {
2813            Integer hexVal = Integer.parseInt(macAddrStr[i], 16);
2814            srcMac[i] = hexVal.byteValue();
2815        }
2816        synchronized (sLock) {
2817            if (isHalStarted()) {
2818                return startSendingOffloadedPacketNative(sWlan0Index, slot, srcMac,
2819                        keepAlivePacket.dstMac, keepAlivePacket.data, period);
2820            } else {
2821                return -1;
2822            }
2823        }
2824    }
2825
2826    private native static int stopSendingOffloadedPacketNative(int iface, int idx);
2827
2828    public int
2829    stopSendingOffloadedPacket(int slot) {
2830        Log.d(TAG, "stopSendingOffloadedPacket " + slot);
2831        synchronized (sLock) {
2832            if (isHalStarted()) {
2833                return stopSendingOffloadedPacketNative(sWlan0Index, slot);
2834            } else {
2835                return -1;
2836            }
2837        }
2838    }
2839
2840    public static interface WifiRssiEventHandler {
2841        void onRssiThresholdBreached(byte curRssi);
2842    }
2843
2844    private static WifiRssiEventHandler sWifiRssiEventHandler;
2845
2846    // Callback from native
2847    private static void onRssiThresholdBreached(int id, byte curRssi) {
2848        WifiRssiEventHandler handler = sWifiRssiEventHandler;
2849        if (handler != null) {
2850            handler.onRssiThresholdBreached(curRssi);
2851        }
2852    }
2853
2854    private native static int startRssiMonitoringNative(int iface, int id,
2855                                        byte maxRssi, byte minRssi);
2856
2857    private static int sRssiMonitorCmdId = 0;
2858
2859    public int startRssiMonitoring(byte maxRssi, byte minRssi,
2860                                                WifiRssiEventHandler rssiEventHandler) {
2861        Log.d(TAG, "startRssiMonitoring: maxRssi=" + maxRssi + " minRssi=" + minRssi);
2862        synchronized (sLock) {
2863            sWifiRssiEventHandler = rssiEventHandler;
2864            if (isHalStarted()) {
2865                if (sRssiMonitorCmdId != 0) {
2866                    stopRssiMonitoring();
2867                }
2868
2869                sRssiMonitorCmdId = getNewCmdIdLocked();
2870                Log.d(TAG, "sRssiMonitorCmdId = " + sRssiMonitorCmdId);
2871                int ret = startRssiMonitoringNative(sWlan0Index, sRssiMonitorCmdId,
2872                        maxRssi, minRssi);
2873                if (ret != 0) { // if not success
2874                    sRssiMonitorCmdId = 0;
2875                }
2876                return ret;
2877            } else {
2878                return -1;
2879            }
2880        }
2881    }
2882
2883    private native static int stopRssiMonitoringNative(int iface, int idx);
2884
2885    public int stopRssiMonitoring() {
2886        Log.d(TAG, "stopRssiMonitoring, cmdId " + sRssiMonitorCmdId);
2887        synchronized (sLock) {
2888            if (isHalStarted()) {
2889                int ret = 0;
2890                if (sRssiMonitorCmdId != 0) {
2891                    ret = stopRssiMonitoringNative(sWlan0Index, sRssiMonitorCmdId);
2892                }
2893                sRssiMonitorCmdId = 0;
2894                return ret;
2895            } else {
2896                return -1;
2897            }
2898        }
2899    }
2900
2901    private static native WifiWakeReasonAndCounts getWlanWakeReasonCountNative(int iface);
2902
2903    /**
2904     * Fetch the host wakeup reasons stats from wlan driver.
2905     * @return the |WifiWakeReasonAndCounts| object retrieved from the wlan driver.
2906     */
2907    public WifiWakeReasonAndCounts getWlanWakeReasonCount() {
2908        Log.d(TAG, "getWlanWakeReasonCount " + sWlan0Index);
2909        synchronized (sLock) {
2910            if (isHalStarted()) {
2911                return getWlanWakeReasonCountNative(sWlan0Index);
2912            } else {
2913                return null;
2914            }
2915        }
2916    }
2917}
2918