Merge "Add code to sanitize location info in CellInfo" (f3e623ff) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/NetworkScanRequestTracker.java

+43 −13

Original line number	Diff line number	Diff line
		@@ -16,10 +16,12 @@

		package com.android.internal.telephony;

		import static android.os.Binder.withCleanCallingIdentity;
		import static android.telephony.AccessNetworkConstants.AccessNetworkType.EUTRAN;
		import static android.telephony.AccessNetworkConstants.AccessNetworkType.GERAN;
		import static android.telephony.AccessNetworkConstants.AccessNetworkType.UTRAN;

		import android.content.Context;
		import android.hardware.radio.V1_0.RadioError;
		import android.os.AsyncResult;
		import android.os.Binder;
		@@ -39,8 +41,10 @@ import android.telephony.RadioAccessSpecifier;
		import android.telephony.TelephonyScanManager;
		import android.util.Log;

		import java.util.Collection;
		import java.util.List;
		import java.util.concurrent.atomic.AtomicInteger;
		import java.util.stream.Collectors;

		/**
		* Manages radio access network scan requests.
		@@ -160,6 +164,25 @@ public final class NetworkScanRequestTracker {
		return true;
		}

		private static boolean doesCellInfoCorrespondToKnownMccMnc(CellInfo ci,
		Collection<String> knownMccMncs) {
		String mccMnc = ci.getCellIdentity().getMccString()
		+ ci.getCellIdentity().getMncString();
		return knownMccMncs.contains(mccMnc);
		}

		/**
		* @return S list of MCC/MNC ids that apps should be allowed to see as results from a network
		* scan when scan results are restricted due to location privacy.
		*/
		public static List<String> getAllowedMccMncsForLocationRestrictedScan(Context context) {
		return withCleanCallingIdentity(() -> SubscriptionController.getInstance()
		.getAllSubInfoList(context.getOpPackageName()).stream()
		.filter(subInfo -> subInfo.getMccString() != null)
		.map(subInfo -> subInfo.getMccString() + subInfo.getMncString())
		.collect(Collectors.toList()));
		}

		/** Sends a message back to the application via its callback. */
		private void notifyMessenger(NetworkScanRequestInfo nsri, int what, int err,
		List<CellInfo> result) {
		@@ -168,7 +191,17 @@ public final class NetworkScanRequestTracker {
		message.what = what;
		message.arg1 = err;
		message.arg2 = nsri.mScanId;

		if (result != null) {
		if (what == TelephonyScanManager.CALLBACK_RESTRICTED_SCAN_RESULTS) {
		List<String> allowedMccMncs =
		getAllowedMccMncsForLocationRestrictedScan(nsri.mPhone.getContext());

		result = result.stream().map(CellInfo::sanitizeLocationInfo)
		.filter(ci -> doesCellInfoCorrespondToKnownMccMnc(ci, allowedMccMncs))
		.collect(Collectors.toList());
		}

		CellInfo[] ci = result.toArray(new CellInfo[result.size()]);
		Bundle b = new Bundle();
		b.putParcelableArray(TelephonyScanManager.SCAN_RESULT_KEY, ci);
		@@ -387,25 +420,23 @@ public final class NetworkScanRequestTracker {
		.build();
		if (ar.exception == null && ar.result != null) {
		NetworkScanResult nsr = (NetworkScanResult) ar.result;
		if (nsr.scanError == NetworkScan.SUCCESS) {
		if (LocationAccessPolicy.checkLocationPermission(
		boolean isLocationAccessAllowed = LocationAccessPolicy.checkLocationPermission(
		nsri.mPhone.getContext(), locationQuery)
		== LocationAccessPolicy.LocationPermissionResult.ALLOWED) {
		notifyMessenger(nsri, TelephonyScanManager.CALLBACK_SCAN_RESULTS,
		== LocationAccessPolicy.LocationPermissionResult.ALLOWED;
		int notifyMsg = isLocationAccessAllowed
		? TelephonyScanManager.CALLBACK_SCAN_RESULTS
		: TelephonyScanManager.CALLBACK_RESTRICTED_SCAN_RESULTS;
		if (nsr.scanError == NetworkScan.SUCCESS) {
		notifyMessenger(nsri, notifyMsg,
		rilErrorToScanError(nsr.scanError), nsr.networkInfos);
		}
		if (nsr.scanStatus == NetworkScanResult.SCAN_STATUS_COMPLETE) {
		deleteScanAndMayNotify(nsri, NetworkScan.SUCCESS, true);
		nsri.mPhone.mCi.unregisterForNetworkScanResult(mHandler);
		}
		} else {
		if (nsr.networkInfos != null) {
		if (LocationAccessPolicy.checkLocationPermission(
		nsri.mPhone.getContext(), locationQuery)
		== LocationAccessPolicy.LocationPermissionResult.ALLOWED) {
		notifyMessenger(nsri, TelephonyScanManager.CALLBACK_SCAN_RESULTS,
		NetworkScan.SUCCESS, nsr.networkInfos);
		}
		notifyMessenger(nsri, notifyMsg,
		rilErrorToScanError(nsr.scanError), nsr.networkInfos);
		}
		deleteScanAndMayNotify(nsri, rilErrorToScanError(nsr.scanError), true);
		nsri.mPhone.mCi.unregisterForNetworkScanResult(mHandler);
		@@ -417,7 +448,6 @@ public final class NetworkScanRequestTracker {
		}
		}


		// Stops the scan if the scanId and uid match the mScanId and mUid.
		// If the scan to be stopped is the live scan, we only send the request to RIL, while the
		// mLiveRequestInfo will not be cleared and the user will not be notified either.