Surface list of apps with given network policy.

Bug: 6007276
Change-Id: I0f0e939ee6481496480c4afaa108c99eb158547c

Author: jsharkey

core/java/android/net/INetworkPolicyManager.aidl

@@ -32,6 +32,7 @@ interface INetworkPolicyManager {
     /** Control UID policies. */
     void setAppPolicy(int appId, int policy);
     int getAppPolicy(int appId);
+    int[] getAppsWithPolicy(int policy);
 
     boolean isUidForeground(int uid);
 

core/java/android/net/NetworkPolicyManager.java

@@ -92,6 +92,14 @@ public int getAppPolicy(int appId) {
         }
     }
 
+    public int[] getAppsWithPolicy(int policy) {
+        try {
+            return mService.getAppsWithPolicy(policy);
+        } catch (RemoteException e) {
+            return new int[0];
+        }
+    }
+
     public void registerListener(INetworkPolicyListener listener) {
         try {
             mService.registerListener(listener);

core/java/com/android/internal/util/ArrayUtils.java

@@ -201,4 +201,40 @@ public static <T> T[] removeElement(Class<T> kind, T[] array, T element) {
         }
         return array;
     }
+
+    public static int[] appendInt(int[] cur, int val) {
+        if (cur == null) {
+            return new int[] { val };
+        }
+        final int N = cur.length;
+        for (int i = 0; i < N; i++) {
+            if (cur[i] == val) {
+                return cur;
+            }
+        }
+        int[] ret = new int[N + 1];
+        System.arraycopy(cur, 0, ret, 0, N);
+        ret[N] = val;
+        return ret;
+    }
+
+    public static int[] removeInt(int[] cur, int val) {
+        if (cur == null) {
+            return null;
+        }
+        final int N = cur.length;
+        for (int i = 0; i < N; i++) {
+            if (cur[i] == val) {
+                int[] ret = new int[N - 1];
+                if (i > 0) {
+                    System.arraycopy(cur, 0, ret, 0, i);
+                }
+                if (i < (N - 1)) {
+                    System.arraycopy(cur, i + 1, ret, i, N - i - 1);
+                }
+                return ret;
+            }
+        }
+        return cur;
+    }
 }

services/java/com/android/server/net/NetworkPolicyManagerService.java

@@ -50,6 +50,7 @@
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.telephony.TelephonyManager.SIM_STATE_READY;
 import static android.text.format.DateUtils.DAY_IN_MILLIS;
+import static com.android.internal.util.ArrayUtils.appendInt;
 import static com.android.internal.util.Preconditions.checkNotNull;
 import static com.android.server.NetworkManagementService.LIMIT_GLOBAL_ALERT;
 import static com.android.server.net.NetworkPolicyManagerService.XmlUtils.readBooleanAttribute;
@@ -1215,6 +1216,23 @@ public int getAppPolicy(int appId) {
         }
     }
 
+    @Override
+    public int[] getAppsWithPolicy(int policy) {
+        mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
+
+        int[] appIds = new int[0];
+        synchronized (mRulesLock) {
+            for (int i = 0; i < mAppPolicy.size(); i++) {
+                final int appId = mAppPolicy.keyAt(i);
+                final int appPolicy = mAppPolicy.valueAt(i);
+                if (appPolicy == policy) {
+                    appIds = appendInt(appIds, appId);
+                }
+            }
+        }
+        return appIds;
+    }
+
     @Override
     public void registerListener(INetworkPolicyListener listener) {
         // TODO: create permission for observing network policy

services/java/com/android/server/pm/PackageManagerService.java

@@ -16,12 +16,14 @@
 
 package com.android.server.pm;
 
+import static android.Manifest.permission.GRANT_REVOKE_PERMISSIONS;
+import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DEFAULT;
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED;
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_DISABLED_USER;
 import static android.content.pm.PackageManager.COMPONENT_ENABLED_STATE_ENABLED;
-import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
-import static android.Manifest.permission.GRANT_REVOKE_PERMISSIONS;
+import static com.android.internal.util.ArrayUtils.appendInt;
+import static com.android.internal.util.ArrayUtils.removeInt;
 import static libcore.io.OsConstants.S_ISLNK;
 
 import com.android.internal.app.IMediaContainerService;
@@ -1451,22 +1453,6 @@ void readPermission(XmlPullParser parser, String name)
         }
     }
 
-    static int[] appendInt(int[] cur, int val) {
-        if (cur == null) {
-            return new int[] { val };
-        }
-        final int N = cur.length;
-        for (int i=0; i<N; i++) {
-            if (cur[i] == val) {
-                return cur;
-            }
-        }
-        int[] ret = new int[N+1];
-        System.arraycopy(cur, 0, ret, 0, N);
-        ret[N] = val;
-        return ret;
-    }
-
     static int[] appendInts(int[] cur, int[] add) {
         if (add == null) return cur;
         if (cur == null) return add;
@@ -1477,26 +1463,6 @@ static int[] appendInts(int[] cur, int[] add) {
         return cur;
     }
 
-    static int[] removeInt(int[] cur, int val) {
-        if (cur == null) {
-            return null;
-        }
-        final int N = cur.length;
-        for (int i=0; i<N; i++) {
-            if (cur[i] == val) {
-                int[] ret = new int[N-1];
-                if (i > 0) {
-                    System.arraycopy(cur, 0, ret, 0, i);
-                }
-                if (i < (N-1)) {
-                    System.arraycopy(cur, i + 1, ret, i, N - i - 1);
-                }
-                return ret;
-            }
-        }
-        return cur;
-    }
-
     static int[] removeInts(int[] cur, int[] rem) {
         if (rem == null) return cur;
         if (cur == null) return cur;