Android(安卓)5.1 open data flow 数据开启流程
16lz
2021-12-04
先上一张流程图
Settings.apk 在Settings -> Data Usage Summary中的某个SIM tab下开启数据开关 android/ packages/apps/Settings/src/com/android/settings/DataUsageSummary.java
setMobileDataEnabled (true);
下面这部根据phoneId获得了当前获得了SubId mTelephonyManager . setDataEnabled ( subId [ 0 ], enabled );
frameworks/base
数据开关都会调用到TelephonyManager.setDataEnabled()，不管是从流量使用情况还是从下拉的“快速设置”（Quick Setting）里打开（这里会在后面补充说明）
android/frameworks/base/telephony/java/android/telephony/TelephonyManager.java
getITelephony (). setDataEnabled ( subId , enable );
android/ packages/services/Telephony/src/com/android/phone/PhoneInterfaceManager.java
到这里才是设置phone的数据开启 phone . setDataEnabled ( enable );
android/ frameworks/opt/telephony/src/java/com/android/internal/telephony/gsm/GSMPhone.java
mDcTracker . setDataEnabled ( enable );
发送打开数据开关的消息CMD_SET_USER_DATA_ENABLE Message msg = obtainMessage ( DctConstants . CMD_SET_USER_DATA_ENABLE );
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcTracker.java setupDataOnConnectableApns ( reason );
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcAsyncChannel.java
sendMessage
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DataConnection.java 这其实是个状态即机 StateMachine，这个类或者或机制，本身也比较复杂，以后看明白了以后会单独在写一篇文章 现在是进入其中一个状态 DcInactiveState。 DcInactiveState processmesssage
onConnect ( mConnectionParams );
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/RIL.java
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Settings.apk 在Settings -> Data Usage Summary中的某个SIM tab下开启数据开关 android/ packages/apps/Settings/src/com/android/settings/DataUsageSummary.java
setMobileDataEnabled (true);
private View.OnClickListener mDataEnabledListener = new View.OnClickListener() {@Overridepublic void onClick(View v) {if (mBinding) return;final boolean dataEnabled = !mDataEnabled.isChecked();final String currentTab = mCurrentTab;if (TAB_MOBILE.equals(currentTab) || currentTab.startsWith(TAB_SIM)) {if (dataEnabled) {setMobileDataEnabled(true);if (mPolicyEditor.getPolicyWarningBytes(mTemplate) == WARNING_DISABLED) {mPolicyEditor.setPolicyWarningBytes(mTemplate, 2 * GB_IN_BYTES);}} else {// disabling data; show confirmation dialog which eventually// calls setMobileDataEnabled() once user confirms.ConfirmDataDisableFragment.show(DataUsageSummary.this);}}updatePolicy(false);}};
下面这部根据phoneId获得了当前获得了SubId mTelephonyManager . setDataEnabled ( subId [ 0 ], enabled );
private void setMobileDataEnabled(boolean enabled) {if (LOGD) Log.d(TAG, "setMobileDataEnabled()");// How about exposing sub based API like TelephonyManager.setDataEnabled(int subId);if (mCurrentTab.startsWith(TAB_SIM)) {int phoneId = multiSimGetCurrentSub();// as per phone, set the individual flagandroid.provider.Settings.Global.putInt(getActivity().getContentResolver(),android.provider.Settings.Global.MOBILE_DATA + phoneId, enabled ? 1 : 0);int[] subId = SubscriptionManager.getSubId(phoneId);mTelephonyManager.setDataEnabled(subId[0], enabled);} else {mTelephonyManager.setDataEnabled(enabled);mMobileDataEnabled = enabled;}updatePolicy(false);}
frameworks/base
数据开关都会调用到TelephonyManager.setDataEnabled()，不管是从流量使用情况还是从下拉的“快速设置”（Quick Setting）里打开（这里会在后面补充说明）
android/frameworks/base/telephony/java/android/telephony/TelephonyManager.java
getITelephony (). setDataEnabled ( subId , enable );
/** @hide */@SystemApipublic void setDataEnabled(int subId, boolean enable) {try {AppOpsManager appOps = (AppOpsManager)mContext.getSystemService(Context.APP_OPS_SERVICE);if (enable) {if (appOps.noteOp(AppOpsManager.OP_DATA_CONNECT_CHANGE) != AppOpsManager.MODE_ALLOWED) {Log.w(TAG, "Permission denied by user.");return;}}Log.d(TAG, "setDataEnabled: enabled=" + enable);getITelephony().setDataEnabled(subId, enable);} catch (RemoteException e) {Log.e(TAG, "Error calling setDataEnabled", e);}}
android/ packages/services/Telephony/src/com/android/phone/PhoneInterfaceManager.java
到这里才是设置phone的数据开启 phone . setDataEnabled ( enable );
/*** Set mobile data enabled* Used by the user through settings etc to turn on/off mobile data** @param enable {@code true} turn turn data on, else {@code false}*/@Overridepublic void setDataEnabled(int subId, boolean enable) {enforceModifyPermission();int phoneId = mSubscriptionController.getPhoneId(subId);log("getDataEnabled: subId=" + subId + " phoneId=" + phoneId);Phone phone = PhoneFactory.getPhone(phoneId);if (phone != null) {log("setDataEnabled: subId=" + subId + " enable=" + enable);phone.setDataEnabled(enable);} else {loge("setDataEnabled: no phone for subId=" + subId);}}
android/ frameworks/opt/telephony/src/java/com/android/internal/telephony/gsm/GSMPhone.java
mDcTracker . setDataEnabled ( enable );
android/rameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcTrackerBase.java@Overridepublic void setDataEnabled(boolean enable) {mDcTracker.setDataEnabled(enable);}
发送打开数据开关的消息CMD_SET_USER_DATA_ENABLE Message msg = obtainMessage ( DctConstants . CMD_SET_USER_DATA_ENABLE );
处理消息 onSetUserDataEnabled ( enabled );/*** Modify {@link android.provider.Settings.Global#MOBILE_DATA} value.*/public void setDataEnabled(boolean enable) {Message msg = obtainMessage(DctConstants.CMD_SET_USER_DATA_ENABLE);msg.arg1 = enable ? 1 : 0;sendMessage(msg);}
onTrySetupData ( Phone . REASON_DATA_ENABLED );@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {log("DISCONNECTED_CONNECTED: msg=" + msg);DcAsyncChannel dcac = (DcAsyncChannel) msg.obj;mDataConnectionAcHashMap.remove(dcac.getDataConnectionIdSync());dcac.disconnected();break;}...case DctConstants.CMD_SET_USER_DATA_ENABLE: {final boolean enabled = (msg.arg1 == DctConstants.ENABLED) ? true : false;if (DBG) log("CMD_SET_USER_DATA_ENABLE enabled=" + enabled);onSetUserDataEnabled(enabled);break;}...
protected void onSetUserDataEnabled(boolean enabled) {synchronized (mDataEnabledLock) {if (mUserDataEnabled != enabled) {mUserDataEnabled = enabled;Settings.Global.putInt(mPhone.getContext().getContentResolver(),Settings.Global.MOBILE_DATA + mPhone.getPhoneId(), enabled ? 1 : 0);if (getDataOnRoamingEnabled() == false &&mPhone.getServiceState().getRoaming() == true) {if (enabled) {notifyOffApnsOfAvailability(Phone.REASON_ROAMING_ON);} else {notifyOffApnsOfAvailability(Phone.REASON_DATA_DISABLED);}}if (enabled) {onTrySetupData(Phone.REASON_DATA_ENABLED);} else {onCleanUpAllConnections(Phone.REASON_DATA_SPECIFIC_DISABLED);}}}}
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcTracker.java setupDataOnConnectableApns ( reason );
trySetupData ( apnContext );@Override// TODO: We shouldnt need this.protected boolean onTrySetupData(String reason) {if (DBG) log("onTrySetupData: reason=" + reason);setupDataOnConnectableApns(reason);return true;}
下面这个方法比较长，有很多条件的检查 boolean retValue = setupData ( apnContext , radioTech );private void setupDataOnConnectableApns(String reason) {if (DBG) log("setupDataOnConnectableApns: " + reason);for (ApnContext apnContext : mPrioritySortedApnContexts) {if (DBG) log("setupDataOnConnectableApns: apnContext " + apnContext);if (apnContext.getState() == DctConstants.State.FAILED) {apnContext.setState(DctConstants.State.IDLE);}if (apnContext.isConnectable()) {log("setupDataOnConnectableApns: isConnectable() call trySetupData");apnContext.setReason(reason);trySetupData(apnContext);}}}
private boolean trySetupData(ApnContext apnContext) {...if ( apnContext . isConnectable () && ( isEmergencyApn ||(isDataAllowed(apnContext) &&getAnyDataEnabled(checkUserDataEnabled) && !isEmergency()))) {if (apnContext.getState() == DctConstants.State.FAILED) {if (DBG) log("trySetupData: make a FAILED ApnContext IDLE so its reusable");apnContext.setState(DctConstants.State.IDLE);}int radioTech = mPhone.getServiceState().getRilDataRadioTechnology();if (apnContext.getState() == DctConstants.State.IDLE) {ArrayList<ApnSetting> waitingApns = buildWaitingApns(apnContext.getApnType(),radioTech);if (waitingApns.isEmpty()) {notifyNoData(DcFailCause.MISSING_UNKNOWN_APN, apnContext);notifyOffApnsOfAvailability(apnContext.getReason());if (DBG) log("trySetupData: X No APN found retValue=false");return false;} else {apnContext.setWaitingApns(waitingApns);if (DBG) {log ("trySetupData: Create from mAllApnSettings : "+ apnListToString(mAllApnSettings));}}}if (DBG) {log("trySetupData: call setupData, waitingApns : "+ apnListToString(apnContext.getWaitingApns()));}boolean retValue = setupData(apnContext, radioTech);//7notifyOffApnsOfAvailability(apnContext.getReason());if (DBG) log("trySetupData: X retValue=" + retValue);return retValue;} else {if (!apnContext.getApnType().equals(PhoneConstants.APN_TYPE_DEFAULT)&& apnContext.isConnectable()) {mPhone.notifyDataConnectionFailed(apnContext.getReason(), apnContext.getApnType());}notifyOffApnsOfAvailability(apnContext.getReason());if (DBG) log ("trySetupData: X apnContext not 'ready' retValue=false");return false;}}
dcac.bringUp(apnContext, getInitialMaxRetry(), profileId, radioTech, mAutoAttachOnCreation, msg ); private boolean setupData(ApnContext apnContext, int radioTech) {if (DBG) log("setupData: apnContext=" + apnContext);ApnSetting apnSetting;DcAsyncChannel dcac = null;apnSetting = apnContext.getNextWaitingApn();if (apnSetting == null) {if (DBG) log("setupData: return for no apn found!");return false;}int profileId = apnSetting.profileId;if (profileId == 0) {profileId = getApnProfileID(apnContext.getApnType());}// On CDMA, if we're explicitly asking for DUN, we need have// a dun-profiled connection so we can't share an existing one// On GSM/LTE we can share existing apn connections provided they support// this type.if (apnContext.getApnType() != PhoneConstants.APN_TYPE_DUN ||teardownForDun() == false) {dcac = checkForCompatibleConnectedApnContext(apnContext);if (dcac != null) {// Get the dcacApnSetting for the connection we want to share.ApnSetting dcacApnSetting = dcac.getApnSettingSync();if (dcacApnSetting != null) {// Setting is good, so use it.apnSetting = dcacApnSetting;}}}if (dcac == null) {if (isOnlySingleDcAllowed(radioTech)) {if (isHigherPriorityApnContextActive(apnContext)) {if (DBG) {log("setupData: Higher priority ApnContext active. Ignoring call");}return false;}// Only lower priority calls left. Disconnect them all in this single PDP case// so that we can bring up the requested higher priority call (once we receive// repsonse for deactivate request for the calls we are about to disconnectif (cleanUpAllConnections(true, Phone.REASON_SINGLE_PDN_ARBITRATION)) {// If any call actually requested to be disconnected, means we can't// bring up this connection yet as we need to wait for those data calls// to be disconnected.if (DBG) log("setupData: Some calls are disconnecting first. Wait and retry");return false;}// No other calls are active, so proceedif (DBG) log("setupData: Single pdp. Continue setting up data call.");}dcac = findFreeDataConnection();if (dcac == null) {dcac = createDataConnection();}if (dcac == null) {if (DBG) log("setupData: No free DataConnection and couldn't create one, WEIRD");return false;}}if (DBG) log("setupData: dcac=" + dcac + " apnSetting=" + apnSetting);apnContext.setDataConnectionAc(dcac);apnContext.setApnSetting(apnSetting);apnContext.setState(DctConstants.State.CONNECTING);mPhone.notifyDataConnection(apnContext.getReason(), apnContext.getApnType());Message msg = obtainMessage();msg.what = DctConstants.EVENT_DATA_SETUP_COMPLETE;msg.obj = apnContext;dcac.bringUp(apnContext, getInitialMaxRetry(), profileId, radioTech, mAutoAttachOnCreation,msg);//8if (DBG) log("setupData: initing!");return true;}
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DcAsyncChannel.java
sendMessage
/*** Bring up a connection to the apn and return an AsyncResult in onCompletedMsg.* Used for cellular networks that use Acesss Point Names (APN) such* as GSM networks.** @param apnContext is the Access Point Name to bring up a connection to* @param initialMaxRetry the number of retires for initial bringup.* @param profileId for the conneciton* @param onCompletedMsg is sent with its msg.obj as an AsyncResult object.* With AsyncResult.userObj set to the original msg.obj,* AsyncResult.result = FailCause and AsyncResult.exception = Exception().*/public void bringUp(ApnContext apnContext, int initialMaxRetry, int profileId,int rilRadioTechnology, boolean retryWhenSSChange, Message onCompletedMsg) {if (DBG) {log("bringUp: apnContext=" + apnContext + " initialMaxRetry=" + initialMaxRetry+ " onCompletedMsg=" + onCompletedMsg);}sendMessage(DataConnection.EVENT_CONNECT,//9new ConnectionParams(apnContext, initialMaxRetry, profileId,rilRadioTechnology, retryWhenSSChange, onCompletedMsg));}
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/dataconnection/DataConnection.java 这其实是个状态即机 StateMachine，这个类或者或机制，本身也比较复杂，以后看明白了以后会单独在写一篇文章 现在是进入其中一个状态 DcInactiveState。 DcInactiveState processmesssage
onConnect ( mConnectionParams );
mPhone . mCi . setupDataCall/*** The state machine is inactive and expects a EVENT_CONNECT.*/private class DcInactiveState extends State {...@Overridepublic boolean processMessage(Message msg) {...case EVENT_CONNECT:if (DBG) log("DcInactiveState: mag.what=EVENT_CONNECT");ConnectionParams cp = (ConnectionParams) msg.obj;if (initConnection(cp)) {onConnect(mConnectionParams);//10transitionTo(mActivatingState);} else {if (DBG) {log("DcInactiveState: msg.what=EVENT_CONNECT initConnection failed");}notifyConnectCompleted(cp, DcFailCause.UNACCEPTABLE_NETWORK_PARAMETER,false);}retVal = HANDLED;break;
/*** Begin setting up a data connection, calls setupDataCall* and the ConnectionParams will be returned with the* EVENT_SETUP_DATA_CONNECTION_DONE AsyncResul.userObj.** @param cp is the connection parameters*/private void onConnect(ConnectionParams cp) {if (DBG) log("onConnect: carrier='" + mApnSetting.carrier+ "' APN='" + mApnSetting.apn+ "' proxy='" + mApnSetting.proxy + "' port='" + mApnSetting.port + "'");// Check if we should fake an error.if (mDcTesterFailBringUpAll.getDcFailBringUp().mCounter > 0) {...}mCreateTime = -1;mLastFailTime = -1;mLastFailCause = DcFailCause.NONE;// The data profile's profile ID must be set when it is created.int dataProfileId;if (mApnSetting.getApnProfileType() == ApnProfileType.PROFILE_TYPE_OMH) {dataProfileId = mApnSetting.getProfileId() + RILConstants.DATA_PROFILE_OEM_BASE;log("OMH profile, dataProfile id = " + dataProfileId);} else {dataProfileId = cp.mProfileId;}// msg.obj will be returned in AsyncResult.userObj;Message msg = obtainMessage(EVENT_SETUP_DATA_CONNECTION_DONE, cp);msg.obj = cp;int authType = mApnSetting.authType;if (authType == -1) {authType = TextUtils.isEmpty(mApnSetting.user) ? RILConstants.SETUP_DATA_AUTH_NONE: RILConstants.SETUP_DATA_AUTH_PAP_CHAP;}String protocol;if (mPhone.getServiceState().getRoaming()) {protocol = mApnSetting.roamingProtocol;} else {protocol = mApnSetting.protocol;}mPhone.mCi.setupDataCall(//11Integer.toString(cp.mRilRat + 2),Integer.toString(dataProfileId),mApnSetting.apn, mApnSetting.user, mApnSetting.password,Integer.toString(authType),protocol, msg);}
android/frameworks/opt/telephony/src/java/com/android/internal/telephony/RIL.java
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