sdk/sources/android-25/android/net/NetworkPolicyManager.java - android_tools - Git at Google

 /*
  * Copyright (C) 2011 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 static android.content.pm.PackageManager.GET_SIGNATURES;
 import static android.net.NetworkPolicy.CYCLE_NONE;

 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.pm.Signature;
 import android.os.RemoteException;
 import android.os.UserHandle;
 import android.util.DebugUtils;

 import com.google.android.collect.Sets;

 import java.util.Calendar;
 import java.util.HashSet;
 import java.util.TimeZone;

 /**
  * Manager for creating and modifying network policy rules.
  *
  * {@hide}
  */
 public class NetworkPolicyManager {

     /* POLICY_* are masks and can be ORed */
     /** No specific network policy, use system default. */
     public static final int POLICY_NONE = 0x0;
     /** Reject network usage on metered networks when application in background. */
     public static final int POLICY_REJECT_METERED_BACKGROUND = 0x1;
     /** Allow network use (metered or not) in the background in battery save mode. */
     public static final int POLICY_ALLOW_BACKGROUND_BATTERY_SAVE = 0x2;

     /*
      * Rules defining whether an uid has access to a network given its type (metered / non-metered).
      *
      * These rules are bits and can be used in bitmask operations; in particular:
      * - rule & RULE_MASK_METERED: returns the metered-networks status.
      * - rule & RULE_MASK_ALL: returns the all-networks status.
      *
      * The RULE_xxx_ALL rules applies to all networks (metered or non-metered), but on
      * metered networks, the RULE_xxx_METERED rules should be checked first. For example,
      * if the device is on Battery Saver Mode and Data Saver Mode simulatenously, and a uid
      * is whitelisted for the former but not the latter, its status would be
      * RULE_REJECT_METERED | RULE_ALLOW_ALL, meaning it could have access to non-metered
      * networks but not to metered networks.
      *
      * See network-policy-restrictions.md for more info.
      */
     /** No specific rule was set */
     public static final int RULE_NONE = 0;
     /** Allow traffic on metered networks. */
     public static final int RULE_ALLOW_METERED = 1 << 0;
     /** Temporarily allow traffic on metered networks because app is on foreground. */
     public static final int RULE_TEMPORARY_ALLOW_METERED = 1 << 1;
     /** Reject traffic on metered networks. */
     public static final int RULE_REJECT_METERED = 1 << 2;
     /** Network traffic should be allowed on all networks (metered or non-metered), although
      * metered-network restrictions could still apply. */
     public static final int RULE_ALLOW_ALL = 1 << 5;
     /** Reject traffic on all networks. */
     public static final int RULE_REJECT_ALL = 1 << 6;
     /** Mask used to get the {@code RULE_xxx_METERED} rules */
     public static final int MASK_METERED_NETWORKS = 0b00001111;
     /** Mask used to get the {@code RULE_xxx_ALL} rules */
     public static final int MASK_ALL_NETWORKS     = 0b11110000;

     public static final int FIREWALL_RULE_DEFAULT = 0;
     public static final int FIREWALL_RULE_ALLOW = 1;
     public static final int FIREWALL_RULE_DENY = 2;

     public static final int FIREWALL_TYPE_WHITELIST = 0;
     public static final int FIREWALL_TYPE_BLACKLIST = 1;

     public static final int FIREWALL_CHAIN_NONE = 0;
     public static final int FIREWALL_CHAIN_DOZABLE = 1;
     public static final int FIREWALL_CHAIN_STANDBY = 2;
     public static final int FIREWALL_CHAIN_POWERSAVE = 3;

     public static final String FIREWALL_CHAIN_NAME_NONE = "none";
     public static final String FIREWALL_CHAIN_NAME_DOZABLE = "dozable";
     public static final String FIREWALL_CHAIN_NAME_STANDBY = "standby";
     public static final String FIREWALL_CHAIN_NAME_POWERSAVE = "powersave";

     private static final boolean ALLOW_PLATFORM_APP_POLICY = true;

     /**
      * {@link Intent} extra that indicates which {@link NetworkTemplate} rule it
      * applies to.
      */
     public static final String EXTRA_NETWORK_TEMPLATE = "android.net.NETWORK_TEMPLATE";

     private final Context mContext;
     private INetworkPolicyManager mService;

     public NetworkPolicyManager(Context context, INetworkPolicyManager service) {
         if (service == null) {
             throw new IllegalArgumentException("missing INetworkPolicyManager");
         }
         mContext = context;
         mService = service;
     }

     public static NetworkPolicyManager from(Context context) {
         return (NetworkPolicyManager) context.getSystemService(Context.NETWORK_POLICY_SERVICE);
     }

     /**
      * Set policy flags for specific UID.
      *
      * @param policy {@link #POLICY_NONE} or combination of flags like
      * {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
      */
     public void setUidPolicy(int uid, int policy) {
         try {
             mService.setUidPolicy(uid, policy);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     /**
      * Add policy flags for specific UID.  The given policy bits will be set for
      * the uid.  Policy flags may be either
      * {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
      */
     public void addUidPolicy(int uid, int policy) {
         try {
             mService.addUidPolicy(uid, policy);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     /**
      * Clear/remove policy flags for specific UID.  The given policy bits will be set for
      * the uid.  Policy flags may be either
      * {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
      */
     public void removeUidPolicy(int uid, int policy) {
         try {
             mService.removeUidPolicy(uid, policy);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public int getUidPolicy(int uid) {
         try {
             return mService.getUidPolicy(uid);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public int[] getUidsWithPolicy(int policy) {
         try {
             return mService.getUidsWithPolicy(policy);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public void registerListener(INetworkPolicyListener listener) {
         try {
             mService.registerListener(listener);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public void unregisterListener(INetworkPolicyListener listener) {
         try {
             mService.unregisterListener(listener);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public void setNetworkPolicies(NetworkPolicy[] policies) {
         try {
             mService.setNetworkPolicies(policies);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public NetworkPolicy[] getNetworkPolicies() {
         try {
             return mService.getNetworkPolicies(mContext.getOpPackageName());
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public void setRestrictBackground(boolean restrictBackground) {
         try {
             mService.setRestrictBackground(restrictBackground);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     public boolean getRestrictBackground() {
         try {
             return mService.getRestrictBackground();
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     /**
      * Resets network policy settings back to factory defaults.
      *
      * @hide
      */
     public void factoryReset(String subscriber) {
         try {
             mService.factoryReset(subscriber);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }

     /**
      * Compute the last cycle boundary for the given {@link NetworkPolicy}. For
      * example, if cycle day is 20th, and today is June 15th, it will return May
      * 20th. When cycle day doesn't exist in current month, it snaps to the 1st
      * of following month.
      *
      * @hide
      */
     public static long computeLastCycleBoundary(long currentTime, NetworkPolicy policy) {
         if (policy.cycleDay == CYCLE_NONE) {
             throw new IllegalArgumentException("Unable to compute boundary without cycleDay");
         }

         final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(policy.cycleTimezone));
         cal.setTimeInMillis(currentTime);
         snapToCycleDay(cal, policy.cycleDay);

         if (cal.getTimeInMillis() >= currentTime) {
             // Cycle boundary is beyond now, use last cycle boundary
             cal.set(Calendar.DAY_OF_MONTH, 1);
             cal.add(Calendar.MONTH, -1);
             snapToCycleDay(cal, policy.cycleDay);
         }

         return cal.getTimeInMillis();
     }

     /** {@hide} */
     public static long computeNextCycleBoundary(long currentTime, NetworkPolicy policy) {
         if (policy.cycleDay == CYCLE_NONE) {
             throw new IllegalArgumentException("Unable to compute boundary without cycleDay");
         }

         final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(policy.cycleTimezone));
         cal.setTimeInMillis(currentTime);
         snapToCycleDay(cal, policy.cycleDay);

         if (cal.getTimeInMillis() <= currentTime) {
             // Cycle boundary is before now, use next cycle boundary
             cal.set(Calendar.DAY_OF_MONTH, 1);
             cal.add(Calendar.MONTH, 1);
             snapToCycleDay(cal, policy.cycleDay);
         }

         return cal.getTimeInMillis();
     }

     /**
      * Snap to the cycle day for the current month given; when cycle day doesn't
      * exist, it snaps to last second of current month.
      *
      * @hide
      */
     public static void snapToCycleDay(Calendar cal, int cycleDay) {
         cal.set(Calendar.HOUR_OF_DAY, 0);
         cal.set(Calendar.MINUTE, 0);
         cal.set(Calendar.SECOND, 0);
         if (cycleDay > cal.getActualMaximum(Calendar.DAY_OF_MONTH)) {
             cal.set(Calendar.DAY_OF_MONTH, 1);
             cal.add(Calendar.MONTH, 1);
             cal.add(Calendar.SECOND, -1);
         } else {
             cal.set(Calendar.DAY_OF_MONTH, cycleDay);
         }
     }

     /**
      * Check if given UID can have a {@link #setUidPolicy(int, int)} defined,
      * usually to protect critical system services.
      */
     @Deprecated
     public static boolean isUidValidForPolicy(Context context, int uid) {
         // first, quick-reject non-applications
         if (!UserHandle.isApp(uid)) {
             return false;
         }

         if (!ALLOW_PLATFORM_APP_POLICY) {
             final PackageManager pm = context.getPackageManager();
             final HashSet<Signature> systemSignature;
             try {
                 systemSignature = Sets.newHashSet(
                         pm.getPackageInfo("android", GET_SIGNATURES).signatures);
             } catch (NameNotFoundException e) {
                 throw new RuntimeException("problem finding system signature", e);
             }

             try {
                 // reject apps signed with platform cert
                 for (String packageName : pm.getPackagesForUid(uid)) {
                     final HashSet<Signature> packageSignature = Sets.newHashSet(
                             pm.getPackageInfo(packageName, GET_SIGNATURES).signatures);
                     if (packageSignature.containsAll(systemSignature)) {
                         return false;
                     }
                 }
             } catch (NameNotFoundException e) {
             }
         }

         // nothing found above; we can apply policy to UID
         return true;
     }

     /*
      * @hide
      */
     public static String uidRulesToString(int uidRules) {
         final StringBuilder string = new StringBuilder().append(uidRules).append(" (");
         if (uidRules == RULE_NONE) {
             string.append("NONE");
         } else {
             string.append(DebugUtils.flagsToString(NetworkPolicyManager.class, "RULE_", uidRules));
         }
         string.append(")");
         return string.toString();
     }
 }
	/*
	* Copyright (C) 2011 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 static android.content.pm.PackageManager.GET_SIGNATURES;
	import static android.net.NetworkPolicy.CYCLE_NONE;

	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.pm.PackageManager.NameNotFoundException;
	import android.content.pm.Signature;
	import android.os.RemoteException;
	import android.os.UserHandle;
	import android.util.DebugUtils;

	import com.google.android.collect.Sets;

	import java.util.Calendar;
	import java.util.HashSet;
	import java.util.TimeZone;

	/**
	* Manager for creating and modifying network policy rules.
	*
	* {@hide}
	*/
	public class NetworkPolicyManager {

	/* POLICY_* are masks and can be ORed */
	/** No specific network policy, use system default. */
	public static final int POLICY_NONE = 0x0;
	/** Reject network usage on metered networks when application in background. */
	public static final int POLICY_REJECT_METERED_BACKGROUND = 0x1;
	/** Allow network use (metered or not) in the background in battery save mode. */
	public static final int POLICY_ALLOW_BACKGROUND_BATTERY_SAVE = 0x2;

	/*
	* Rules defining whether an uid has access to a network given its type (metered / non-metered).
	*
	* These rules are bits and can be used in bitmask operations; in particular:
	* - rule & RULE_MASK_METERED: returns the metered-networks status.
	* - rule & RULE_MASK_ALL: returns the all-networks status.
	*
	* The RULE_xxx_ALL rules applies to all networks (metered or non-metered), but on
	* metered networks, the RULE_xxx_METERED rules should be checked first. For example,
	* if the device is on Battery Saver Mode and Data Saver Mode simulatenously, and a uid
	* is whitelisted for the former but not the latter, its status would be
	* RULE_REJECT_METERED \| RULE_ALLOW_ALL, meaning it could have access to non-metered
	* networks but not to metered networks.
	*
	* See network-policy-restrictions.md for more info.
	*/
	/** No specific rule was set */
	public static final int RULE_NONE = 0;
	/** Allow traffic on metered networks. */
	public static final int RULE_ALLOW_METERED = 1 << 0;
	/** Temporarily allow traffic on metered networks because app is on foreground. */
	public static final int RULE_TEMPORARY_ALLOW_METERED = 1 << 1;
	/** Reject traffic on metered networks. */
	public static final int RULE_REJECT_METERED = 1 << 2;
	/** Network traffic should be allowed on all networks (metered or non-metered), although
	* metered-network restrictions could still apply. */
	public static final int RULE_ALLOW_ALL = 1 << 5;
	/** Reject traffic on all networks. */
	public static final int RULE_REJECT_ALL = 1 << 6;
	/** Mask used to get the {@code RULE_xxx_METERED} rules */
	public static final int MASK_METERED_NETWORKS = 0b00001111;
	/** Mask used to get the {@code RULE_xxx_ALL} rules */
	public static final int MASK_ALL_NETWORKS = 0b11110000;

	public static final int FIREWALL_RULE_DEFAULT = 0;
	public static final int FIREWALL_RULE_ALLOW = 1;
	public static final int FIREWALL_RULE_DENY = 2;

	public static final int FIREWALL_TYPE_WHITELIST = 0;
	public static final int FIREWALL_TYPE_BLACKLIST = 1;

	public static final int FIREWALL_CHAIN_NONE = 0;
	public static final int FIREWALL_CHAIN_DOZABLE = 1;
	public static final int FIREWALL_CHAIN_STANDBY = 2;
	public static final int FIREWALL_CHAIN_POWERSAVE = 3;

	public static final String FIREWALL_CHAIN_NAME_NONE = "none";
	public static final String FIREWALL_CHAIN_NAME_DOZABLE = "dozable";
	public static final String FIREWALL_CHAIN_NAME_STANDBY = "standby";
	public static final String FIREWALL_CHAIN_NAME_POWERSAVE = "powersave";

	private static final boolean ALLOW_PLATFORM_APP_POLICY = true;

	/**
	* {@link Intent} extra that indicates which {@link NetworkTemplate} rule it
	* applies to.
	*/
	public static final String EXTRA_NETWORK_TEMPLATE = "android.net.NETWORK_TEMPLATE";

	private final Context mContext;
	private INetworkPolicyManager mService;

	public NetworkPolicyManager(Context context, INetworkPolicyManager service) {
	if (service == null) {
	throw new IllegalArgumentException("missing INetworkPolicyManager");
	}
	mContext = context;
	mService = service;
	}

	public static NetworkPolicyManager from(Context context) {
	return (NetworkPolicyManager) context.getSystemService(Context.NETWORK_POLICY_SERVICE);
	}

	/**
	* Set policy flags for specific UID.
	*
	* @param policy {@link #POLICY_NONE} or combination of flags like
	* {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
	*/
	public void setUidPolicy(int uid, int policy) {
	try {
	mService.setUidPolicy(uid, policy);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	/**
	* Add policy flags for specific UID. The given policy bits will be set for
	* the uid. Policy flags may be either
	* {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
	*/
	public void addUidPolicy(int uid, int policy) {
	try {
	mService.addUidPolicy(uid, policy);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	/**
	* Clear/remove policy flags for specific UID. The given policy bits will be set for
	* the uid. Policy flags may be either
	* {@link #POLICY_REJECT_METERED_BACKGROUND} or {@link #POLICY_ALLOW_BACKGROUND_BATTERY_SAVE}.
	*/
	public void removeUidPolicy(int uid, int policy) {
	try {
	mService.removeUidPolicy(uid, policy);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public int getUidPolicy(int uid) {
	try {
	return mService.getUidPolicy(uid);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public int[] getUidsWithPolicy(int policy) {
	try {
	return mService.getUidsWithPolicy(policy);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public void registerListener(INetworkPolicyListener listener) {
	try {
	mService.registerListener(listener);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public void unregisterListener(INetworkPolicyListener listener) {
	try {
	mService.unregisterListener(listener);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public void setNetworkPolicies(NetworkPolicy[] policies) {
	try {
	mService.setNetworkPolicies(policies);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public NetworkPolicy[] getNetworkPolicies() {
	try {
	return mService.getNetworkPolicies(mContext.getOpPackageName());
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public void setRestrictBackground(boolean restrictBackground) {
	try {
	mService.setRestrictBackground(restrictBackground);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	public boolean getRestrictBackground() {
	try {
	return mService.getRestrictBackground();
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	/**
	* Resets network policy settings back to factory defaults.
	*
	* @hide
	*/
	public void factoryReset(String subscriber) {
	try {
	mService.factoryReset(subscriber);
	} catch (RemoteException e) {
	throw e.rethrowFromSystemServer();
	}
	}

	/**
	* Compute the last cycle boundary for the given {@link NetworkPolicy}. For
	* example, if cycle day is 20th, and today is June 15th, it will return May
	* 20th. When cycle day doesn't exist in current month, it snaps to the 1st
	* of following month.
	*
	* @hide
	*/
	public static long computeLastCycleBoundary(long currentTime, NetworkPolicy policy) {
	if (policy.cycleDay == CYCLE_NONE) {
	throw new IllegalArgumentException("Unable to compute boundary without cycleDay");
	}

	final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(policy.cycleTimezone));
	cal.setTimeInMillis(currentTime);
	snapToCycleDay(cal, policy.cycleDay);

	if (cal.getTimeInMillis() >= currentTime) {
	// Cycle boundary is beyond now, use last cycle boundary
	cal.set(Calendar.DAY_OF_MONTH, 1);
	cal.add(Calendar.MONTH, -1);
	snapToCycleDay(cal, policy.cycleDay);
	}

	return cal.getTimeInMillis();
	}

	/** {@hide} */
	public static long computeNextCycleBoundary(long currentTime, NetworkPolicy policy) {
	if (policy.cycleDay == CYCLE_NONE) {
	throw new IllegalArgumentException("Unable to compute boundary without cycleDay");
	}

	final Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(policy.cycleTimezone));
	cal.setTimeInMillis(currentTime);
	snapToCycleDay(cal, policy.cycleDay);

	if (cal.getTimeInMillis() <= currentTime) {
	// Cycle boundary is before now, use next cycle boundary
	cal.set(Calendar.DAY_OF_MONTH, 1);
	cal.add(Calendar.MONTH, 1);
	snapToCycleDay(cal, policy.cycleDay);
	}

	return cal.getTimeInMillis();
	}

	/**
	* Snap to the cycle day for the current month given; when cycle day doesn't
	* exist, it snaps to last second of current month.
	*
	* @hide
	*/
	public static void snapToCycleDay(Calendar cal, int cycleDay) {
	cal.set(Calendar.HOUR_OF_DAY, 0);
	cal.set(Calendar.MINUTE, 0);
	cal.set(Calendar.SECOND, 0);
	if (cycleDay > cal.getActualMaximum(Calendar.DAY_OF_MONTH)) {
	cal.set(Calendar.DAY_OF_MONTH, 1);
	cal.add(Calendar.MONTH, 1);
	cal.add(Calendar.SECOND, -1);
	} else {
	cal.set(Calendar.DAY_OF_MONTH, cycleDay);
	}
	}

	/**
	* Check if given UID can have a {@link #setUidPolicy(int, int)} defined,
	* usually to protect critical system services.
	*/
	@Deprecated
	public static boolean isUidValidForPolicy(Context context, int uid) {
	// first, quick-reject non-applications
	if (!UserHandle.isApp(uid)) {
	return false;
	}

	if (!ALLOW_PLATFORM_APP_POLICY) {
	final PackageManager pm = context.getPackageManager();
	final HashSet<Signature> systemSignature;
	try {
	systemSignature = Sets.newHashSet(
	pm.getPackageInfo("android", GET_SIGNATURES).signatures);
	} catch (NameNotFoundException e) {
	throw new RuntimeException("problem finding system signature", e);
	}

	try {
	// reject apps signed with platform cert
	for (String packageName : pm.getPackagesForUid(uid)) {
	final HashSet<Signature> packageSignature = Sets.newHashSet(
	pm.getPackageInfo(packageName, GET_SIGNATURES).signatures);
	if (packageSignature.containsAll(systemSignature)) {
	return false;
	}
	}
	} catch (NameNotFoundException e) {
	}
	}

	// nothing found above; we can apply policy to UID
	return true;
	}

	/*
	* @hide
	*/
	public static String uidRulesToString(int uidRules) {
	final StringBuilder string = new StringBuilder().append(uidRules).append(" (");
	if (uidRules == RULE_NONE) {
	string.append("NONE");
	} else {
	string.append(DebugUtils.flagsToString(NetworkPolicyManager.class, "RULE_", uidRules));
	}
	string.append(")");
	return string.toString();
	}
	}