1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
|
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.net;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Messenger;
import android.os.RemoteException;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.ServiceManager;
import com.android.internal.telephony.DataConnectionTracker;
import com.android.internal.telephony.ITelephony;
import com.android.internal.telephony.Phone;
import com.android.internal.telephony.TelephonyIntents;
import com.android.internal.util.AsyncChannel;
import android.net.NetworkInfo.DetailedState;
import android.net.NetworkInfo;
import android.net.LinkProperties;
import android.telephony.TelephonyManager;
import android.util.Slog;
import android.text.TextUtils;
/**
* Track the state of mobile data connectivity. This is done by
* receiving broadcast intents from the Phone process whenever
* the state of data connectivity changes.
*
* {@hide}
*/
public class MobileDataStateTracker implements NetworkStateTracker {
private static final String TAG = "MobileDataStateTracker";
private static final boolean DBG = true;
private static final boolean VDBG = false;
private Phone.DataState mMobileDataState;
private ITelephony mPhoneService;
private String mApnType;
private static String[] sDnsPropNames;
private NetworkInfo mNetworkInfo;
private boolean mTeardownRequested = false;
private Handler mTarget;
private Context mContext;
private LinkProperties mLinkProperties;
private LinkCapabilities mLinkCapabilities;
private boolean mPrivateDnsRouteSet = false;
private int mDefaultGatewayAddr = 0;
private boolean mDefaultRouteSet = false;
// DEFAULT and HIPRI are the same connection. If we're one of these we need to check if
// the other is also disconnected before we reset sockets
private boolean mIsDefaultOrHipri = false;
private Handler mHandler;
private AsyncChannel mDataConnectionTrackerAc;
private Messenger mMessenger;
/**
* Create a new MobileDataStateTracker
* @param netType the ConnectivityManager network type
* @param tag the name of this network
*/
public MobileDataStateTracker(int netType, String tag) {
mNetworkInfo = new NetworkInfo(netType,
TelephonyManager.getDefault().getNetworkType(), tag,
TelephonyManager.getDefault().getNetworkTypeName());
mApnType = networkTypeToApnType(netType);
if (netType == ConnectivityManager.TYPE_MOBILE ||
netType == ConnectivityManager.TYPE_MOBILE_HIPRI) {
mIsDefaultOrHipri = true;
}
mPhoneService = null;
sDnsPropNames = new String[] {
"net.rmnet0.dns1",
"net.rmnet0.dns2",
"net.eth0.dns1",
"net.eth0.dns2",
"net.eth0.dns3",
"net.eth0.dns4",
"net.gprs.dns1",
"net.gprs.dns2",
"net.ppp0.dns1",
"net.ppp0.dns2"};
}
/**
* Begin monitoring data connectivity.
*
* @param context is the current Android context
* @param target is the Hander to which to return the events.
*/
public void startMonitoring(Context context, Handler target) {
mTarget = target;
mContext = context;
HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread");
handlerThread.start();
mHandler = new MdstHandler(handlerThread.getLooper(), this);
IntentFilter filter = new IntentFilter();
filter.addAction(TelephonyIntents.ACTION_ANY_DATA_CONNECTION_STATE_CHANGED);
filter.addAction(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED);
filter.addAction(DataConnectionTracker.ACTION_DATA_CONNECTION_TRACKER_MESSENGER);
mContext.registerReceiver(new MobileDataStateReceiver(), filter);
mMobileDataState = Phone.DataState.DISCONNECTED;
}
static class MdstHandler extends Handler {
private MobileDataStateTracker mMdst;
MdstHandler(Looper looper, MobileDataStateTracker mdst) {
super(looper);
mMdst = mdst;
}
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED:
if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
if (DBG) {
mMdst.log("MdstHandler connected");
}
mMdst.mDataConnectionTrackerAc = (AsyncChannel) msg.obj;
} else {
if (DBG) {
mMdst.log("MdstHandler %s NOT connected error=" + msg.arg1);
}
}
break;
case AsyncChannel.CMD_CHANNEL_DISCONNECTED:
mMdst.log("Disconnected from DataStateTracker");
mMdst.mDataConnectionTrackerAc = null;
break;
default: {
mMdst.log("Ignorning unknown message=" + msg);
break;
}
}
}
}
/**
* Return the IP addresses of the DNS servers available for the mobile data
* network interface.
* @return a list of DNS addresses, with no holes.
*/
public String[] getDnsPropNames() {
return sDnsPropNames;
}
public boolean isPrivateDnsRouteSet() {
return mPrivateDnsRouteSet;
}
public void privateDnsRouteSet(boolean enabled) {
mPrivateDnsRouteSet = enabled;
}
public NetworkInfo getNetworkInfo() {
return mNetworkInfo;
}
public int getDefaultGatewayAddr() {
return mDefaultGatewayAddr;
}
public boolean isDefaultRouteSet() {
return mDefaultRouteSet;
}
public void defaultRouteSet(boolean enabled) {
mDefaultRouteSet = enabled;
}
/**
* This is not implemented.
*/
public void releaseWakeLock() {
}
private class MobileDataStateReceiver extends BroadcastReceiver {
IConnectivityManager mConnectivityManager;
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(TelephonyIntents.
ACTION_ANY_DATA_CONNECTION_STATE_CHANGED)) {
String apnType = intent.getStringExtra(Phone.DATA_APN_TYPE_KEY);
if (VDBG) {
log(String.format("Broadcast received: ACTION_ANY_DATA_CONNECTION_STATE_CHANGED"
+ "mApnType=%s %s received apnType=%s", mApnType,
TextUtils.equals(apnType, mApnType) ? "==" : "!=", apnType));
}
if (!TextUtils.equals(apnType, mApnType)) {
return;
}
mNetworkInfo.setSubtype(TelephonyManager.getDefault().getNetworkType(),
TelephonyManager.getDefault().getNetworkTypeName());
Phone.DataState state = Enum.valueOf(Phone.DataState.class,
intent.getStringExtra(Phone.STATE_KEY));
String reason = intent.getStringExtra(Phone.STATE_CHANGE_REASON_KEY);
String apnName = intent.getStringExtra(Phone.DATA_APN_KEY);
mNetworkInfo.setIsAvailable(!intent.getBooleanExtra(Phone.NETWORK_UNAVAILABLE_KEY,
false));
if (DBG) {
log("Received state=" + state + ", old=" + mMobileDataState +
", reason=" + (reason == null ? "(unspecified)" : reason));
}
if (mMobileDataState != state) {
mMobileDataState = state;
switch (state) {
case DISCONNECTED:
if(isTeardownRequested()) {
setTeardownRequested(false);
}
setDetailedState(DetailedState.DISCONNECTED, reason, apnName);
boolean doReset = true;
if (mIsDefaultOrHipri == true) {
// both default and hipri must go down before we reset
int typeToCheck = (Phone.APN_TYPE_DEFAULT.equals(mApnType) ?
ConnectivityManager.TYPE_MOBILE_HIPRI :
ConnectivityManager.TYPE_MOBILE);
if (mConnectivityManager == null) {
IBinder b = ServiceManager.getService(
Context.CONNECTIVITY_SERVICE);
mConnectivityManager = IConnectivityManager.Stub.asInterface(b);
}
try {
if (mConnectivityManager != null) {
NetworkInfo info = mConnectivityManager.getNetworkInfo(
typeToCheck);
if (info.isConnected() == true) {
doReset = false;
}
}
} catch (RemoteException e) {
// just go ahead with the reset
loge("Exception trying to contact ConnService: " + e);
}
}
if (doReset && mLinkProperties != null) {
String iface = mLinkProperties.getInterfaceName();
if (iface != null) NetworkUtils.resetConnections(iface);
}
// TODO - check this
// can't do this here - ConnectivityService needs it to clear stuff
// it's ok though - just leave it to be refreshed next time
// we connect.
//if (DBG) log("clearing mInterfaceName for "+ mApnType +
// " as it DISCONNECTED");
//mInterfaceName = null;
//mDefaultGatewayAddr = 0;
break;
case CONNECTING:
setDetailedState(DetailedState.CONNECTING, reason, apnName);
break;
case SUSPENDED:
setDetailedState(DetailedState.SUSPENDED, reason, apnName);
break;
case CONNECTED:
mLinkProperties = intent.getParcelableExtra(
Phone.DATA_LINK_PROPERTIES_KEY);
if (mLinkProperties == null) {
log("CONNECTED event did not supply link properties.");
mLinkProperties = new LinkProperties();
}
mLinkCapabilities = intent.getParcelableExtra(
Phone.DATA_LINK_CAPABILITIES_KEY);
if (mLinkCapabilities == null) {
log("CONNECTED event did not supply link capabilities.");
mLinkCapabilities = new LinkCapabilities();
}
setDetailedState(DetailedState.CONNECTED, reason, apnName);
break;
}
}
} else if (intent.getAction().
equals(TelephonyIntents.ACTION_DATA_CONNECTION_FAILED)) {
String apnType = intent.getStringExtra(Phone.DATA_APN_TYPE_KEY);
if (!TextUtils.equals(apnType, mApnType)) {
if (DBG) {
log(String.format(
"Broadcast received: ACTION_ANY_DATA_CONNECTION_FAILED ignore, " +
"mApnType=%s != received apnType=%s", mApnType, apnType));
}
return;
}
String reason = intent.getStringExtra(Phone.FAILURE_REASON_KEY);
String apnName = intent.getStringExtra(Phone.DATA_APN_KEY);
if (DBG) {
log("Received " + intent.getAction() +
" broadcast" + reason == null ? "" : "(" + reason + ")");
}
setDetailedState(DetailedState.FAILED, reason, apnName);
} else if (intent.getAction().
equals(DataConnectionTracker.ACTION_DATA_CONNECTION_TRACKER_MESSENGER)) {
if (DBG) log(mApnType + " got ACTION_DATA_CONNECTION_TRACKER_MESSENGER");
mMessenger = intent.getParcelableExtra(DataConnectionTracker.EXTRA_MESSENGER);
AsyncChannel ac = new AsyncChannel();
ac.connect(mContext, MobileDataStateTracker.this.mHandler, mMessenger);
} else {
if (DBG) log("Broadcast received: ignore " + intent.getAction());
}
}
}
private void getPhoneService(boolean forceRefresh) {
if ((mPhoneService == null) || forceRefresh) {
mPhoneService = ITelephony.Stub.asInterface(ServiceManager.getService("phone"));
}
}
/**
* Report whether data connectivity is possible.
*/
public boolean isAvailable() {
return mNetworkInfo.isAvailable();
}
/**
* Return the system properties name associated with the tcp buffer sizes
* for this network.
*/
public String getTcpBufferSizesPropName() {
String networkTypeStr = "unknown";
TelephonyManager tm = new TelephonyManager(mContext);
//TODO We have to edit the parameter for getNetworkType regarding CDMA
switch(tm.getNetworkType()) {
case TelephonyManager.NETWORK_TYPE_GPRS:
networkTypeStr = "gprs";
break;
case TelephonyManager.NETWORK_TYPE_EDGE:
networkTypeStr = "edge";
break;
case TelephonyManager.NETWORK_TYPE_UMTS:
networkTypeStr = "umts";
break;
case TelephonyManager.NETWORK_TYPE_HSDPA:
networkTypeStr = "hsdpa";
break;
case TelephonyManager.NETWORK_TYPE_HSUPA:
networkTypeStr = "hsupa";
break;
case TelephonyManager.NETWORK_TYPE_HSPA:
networkTypeStr = "hspa";
break;
case TelephonyManager.NETWORK_TYPE_CDMA:
networkTypeStr = "cdma";
break;
case TelephonyManager.NETWORK_TYPE_1xRTT:
networkTypeStr = "1xrtt";
break;
case TelephonyManager.NETWORK_TYPE_EVDO_0:
networkTypeStr = "evdo";
break;
case TelephonyManager.NETWORK_TYPE_EVDO_A:
networkTypeStr = "evdo";
break;
case TelephonyManager.NETWORK_TYPE_EVDO_B:
networkTypeStr = "evdo";
break;
case TelephonyManager.NETWORK_TYPE_IDEN:
networkTypeStr = "iden";
break;
case TelephonyManager.NETWORK_TYPE_LTE:
networkTypeStr = "lte";
break;
case TelephonyManager.NETWORK_TYPE_EHRPD:
networkTypeStr = "ehrpd";
break;
default:
loge("unknown network type: " + tm.getNetworkType());
}
return "net.tcp.buffersize." + networkTypeStr;
}
/**
* Tear down mobile data connectivity, i.e., disable the ability to create
* mobile data connections.
* TODO - make async and return nothing?
*/
public boolean teardown() {
setTeardownRequested(true);
return (setEnableApn(mApnType, false) != Phone.APN_REQUEST_FAILED);
}
/**
* Record the detailed state of a network, and if it is a
* change from the previous state, send a notification to
* any listeners.
* @param state the new @{code DetailedState}
* @param reason a {@code String} indicating a reason for the state change,
* if one was supplied. May be {@code null}.
* @param extraInfo optional {@code String} providing extra information about the state change
*/
private void setDetailedState(NetworkInfo.DetailedState state, String reason,
String extraInfo) {
if (DBG) log("setDetailed state, old ="
+ mNetworkInfo.getDetailedState() + " and new state=" + state);
if (state != mNetworkInfo.getDetailedState()) {
boolean wasConnecting = (mNetworkInfo.getState() == NetworkInfo.State.CONNECTING);
String lastReason = mNetworkInfo.getReason();
/*
* If a reason was supplied when the CONNECTING state was entered, and no
* reason was supplied for entering the CONNECTED state, then retain the
* reason that was supplied when going to CONNECTING.
*/
if (wasConnecting && state == NetworkInfo.DetailedState.CONNECTED && reason == null
&& lastReason != null)
reason = lastReason;
mNetworkInfo.setDetailedState(state, reason, extraInfo);
Message msg = mTarget.obtainMessage(EVENT_STATE_CHANGED, mNetworkInfo);
msg.sendToTarget();
}
}
public void setTeardownRequested(boolean isRequested) {
mTeardownRequested = isRequested;
}
public boolean isTeardownRequested() {
return mTeardownRequested;
}
/**
* Re-enable mobile data connectivity after a {@link #teardown()}.
* TODO - make async and always get a notification?
*/
public boolean reconnect() {
boolean retValue = false; //connected or expect to be?
setTeardownRequested(false);
switch (setEnableApn(mApnType, true)) {
case Phone.APN_ALREADY_ACTIVE:
// need to set self to CONNECTING so the below message is handled.
retValue = true;
break;
case Phone.APN_REQUEST_STARTED:
// no need to do anything - we're already due some status update intents
retValue = true;
break;
case Phone.APN_REQUEST_FAILED:
case Phone.APN_TYPE_NOT_AVAILABLE:
break;
default:
loge("Error in reconnect - unexpected response.");
break;
}
return retValue;
}
/**
* Turn on or off the mobile radio. No connectivity will be possible while the
* radio is off. The operation is a no-op if the radio is already in the desired state.
* @param turnOn {@code true} if the radio should be turned on, {@code false} if
*/
public boolean setRadio(boolean turnOn) {
getPhoneService(false);
/*
* If the phone process has crashed in the past, we'll get a
* RemoteException and need to re-reference the service.
*/
for (int retry = 0; retry < 2; retry++) {
if (mPhoneService == null) {
log("Ignoring mobile radio request because could not acquire PhoneService");
break;
}
try {
return mPhoneService.setRadio(turnOn);
} catch (RemoteException e) {
if (retry == 0) getPhoneService(true);
}
}
log("Could not set radio power to " + (turnOn ? "on" : "off"));
return false;
}
/**
* Tells the phone sub-system that the caller wants to
* begin using the named feature. The only supported features at
* this time are {@code Phone.FEATURE_ENABLE_MMS}, which allows an application
* to specify that it wants to send and/or receive MMS data, and
* {@code Phone.FEATURE_ENABLE_SUPL}, which is used for Assisted GPS.
* @param feature the name of the feature to be used
* @param callingPid the process ID of the process that is issuing this request
* @param callingUid the user ID of the process that is issuing this request
* @return an integer value representing the outcome of the request.
* The interpretation of this value is feature-specific.
* specific, except that the value {@code -1}
* always indicates failure. For {@code Phone.FEATURE_ENABLE_MMS},
* the other possible return values are
* <ul>
* <li>{@code Phone.APN_ALREADY_ACTIVE}</li>
* <li>{@code Phone.APN_REQUEST_STARTED}</li>
* <li>{@code Phone.APN_TYPE_NOT_AVAILABLE}</li>
* <li>{@code Phone.APN_REQUEST_FAILED}</li>
* </ul>
*/
public int startUsingNetworkFeature(String feature, int callingPid, int callingUid) {
return -1;
}
/**
* Tells the phone sub-system that the caller is finished
* using the named feature. The only supported feature at
* this time is {@code Phone.FEATURE_ENABLE_MMS}, which allows an application
* to specify that it wants to send and/or receive MMS data.
* @param feature the name of the feature that is no longer needed
* @param callingPid the process ID of the process that is issuing this request
* @param callingUid the user ID of the process that is issuing this request
* @return an integer value representing the outcome of the request.
* The interpretation of this value is feature-specific, except that
* the value {@code -1} always indicates failure.
*/
public int stopUsingNetworkFeature(String feature, int callingPid, int callingUid) {
return -1;
}
/**
* @param enabled
*/
public void setDataEnable(boolean enabled) {
try {
log("setDataEnable: E enabled=" + enabled);
mDataConnectionTrackerAc.sendMessage(DataConnectionTracker.CMD_SET_DATA_ENABLE,
enabled ? DataConnectionTracker.ENABLED : DataConnectionTracker.DISABLED);
log("setDataEnable: X enabled=" + enabled);
} catch (Exception e) {
log("setDataEnable: X mAc was null" + e);
}
}
@Override
public String toString() {
StringBuffer sb = new StringBuffer("Mobile data state: ");
sb.append(mMobileDataState);
return sb.toString();
}
/**
* Internal method supporting the ENABLE_MMS feature.
* @param apnType the type of APN to be enabled or disabled (e.g., mms)
* @param enable {@code true} to enable the specified APN type,
* {@code false} to disable it.
* @return an integer value representing the outcome of the request.
*/
private int setEnableApn(String apnType, boolean enable) {
getPhoneService(false);
/*
* If the phone process has crashed in the past, we'll get a
* RemoteException and need to re-reference the service.
*/
for (int retry = 0; retry < 2; retry++) {
if (mPhoneService == null) {
log("Ignoring feature request because could not acquire PhoneService");
break;
}
try {
if (enable) {
return mPhoneService.enableApnType(apnType);
} else {
return mPhoneService.disableApnType(apnType);
}
} catch (RemoteException e) {
if (retry == 0) getPhoneService(true);
}
}
log("Could not " + (enable ? "enable" : "disable") + " APN type \"" + apnType + "\"");
return Phone.APN_REQUEST_FAILED;
}
public static String networkTypeToApnType(int netType) {
switch(netType) {
case ConnectivityManager.TYPE_MOBILE:
return Phone.APN_TYPE_DEFAULT; // TODO - use just one of these
case ConnectivityManager.TYPE_MOBILE_MMS:
return Phone.APN_TYPE_MMS;
case ConnectivityManager.TYPE_MOBILE_SUPL:
return Phone.APN_TYPE_SUPL;
case ConnectivityManager.TYPE_MOBILE_DUN:
return Phone.APN_TYPE_DUN;
case ConnectivityManager.TYPE_MOBILE_HIPRI:
return Phone.APN_TYPE_HIPRI;
default:
sloge("Error mapping networkType " + netType + " to apnType.");
return null;
}
}
/**
* @see android.net.NetworkStateTracker#getLinkProperties()
*/
public LinkProperties getLinkProperties() {
return new LinkProperties(mLinkProperties);
}
/**
* @see android.net.NetworkStateTracker#getLinkCapabilities()
*/
public LinkCapabilities getLinkCapabilities() {
return new LinkCapabilities(mLinkCapabilities);
}
private void log(String s) {
Slog.d(TAG, mApnType + ": " + s);
}
private void loge(String s) {
Slog.e(TAG, mApnType + ": " + s);
}
static private void sloge(String s) {
Slog.e(TAG, s);
}
}
|