| /* |
| * Copyright (C) 2016 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.apf; |
| |
| import android.annotation.NonNull; |
| import android.annotation.SystemApi; |
| import android.annotation.TestApi; |
| import android.content.Context; |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| import com.android.internal.R; |
| |
| /** |
| * APF program support capabilities. |
| * |
| * This class is immutable. |
| * @hide |
| */ |
| @SystemApi |
| @TestApi |
| public final class ApfCapabilities implements Parcelable { |
| /** |
| * Version of APF instruction set supported for packet filtering. 0 indicates no support for |
| * packet filtering using APF programs. |
| */ |
| public final int apfVersionSupported; |
| |
| /** |
| * Maximum size of APF program allowed. |
| */ |
| public final int maximumApfProgramSize; |
| |
| /** |
| * Format of packets passed to APF filter. Should be one of ARPHRD_* |
| */ |
| public final int apfPacketFormat; |
| |
| public ApfCapabilities( |
| int apfVersionSupported, int maximumApfProgramSize, int apfPacketFormat) { |
| this.apfVersionSupported = apfVersionSupported; |
| this.maximumApfProgramSize = maximumApfProgramSize; |
| this.apfPacketFormat = apfPacketFormat; |
| } |
| |
| private ApfCapabilities(Parcel in) { |
| apfVersionSupported = in.readInt(); |
| maximumApfProgramSize = in.readInt(); |
| apfPacketFormat = in.readInt(); |
| } |
| |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel dest, int flags) { |
| dest.writeInt(apfVersionSupported); |
| dest.writeInt(maximumApfProgramSize); |
| dest.writeInt(apfPacketFormat); |
| } |
| |
| public static final Creator<ApfCapabilities> CREATOR = new Creator<ApfCapabilities>() { |
| @Override |
| public ApfCapabilities createFromParcel(Parcel in) { |
| return new ApfCapabilities(in); |
| } |
| |
| @Override |
| public ApfCapabilities[] newArray(int size) { |
| return new ApfCapabilities[size]; |
| } |
| }; |
| |
| @Override |
| public String toString() { |
| return String.format("%s{version: %d, maxSize: %d, format: %d}", getClass().getSimpleName(), |
| apfVersionSupported, maximumApfProgramSize, apfPacketFormat); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof ApfCapabilities)) return false; |
| final ApfCapabilities other = (ApfCapabilities) obj; |
| return apfVersionSupported == other.apfVersionSupported |
| && maximumApfProgramSize == other.maximumApfProgramSize |
| && apfPacketFormat == other.apfPacketFormat; |
| } |
| |
| /** |
| * Returns true if the APF interpreter advertises support for the data buffer access opcodes |
| * LDDW and STDW. |
| * |
| * Full LDDW and STDW support is present from APFv4 on. |
| */ |
| public boolean hasDataAccess() { |
| return apfVersionSupported >= 4; |
| } |
| |
| /** |
| * @return Whether the APF Filter in the device should filter out IEEE 802.3 Frames. |
| */ |
| public static boolean getApfDrop8023Frames(@NonNull Context context) { |
| return context.getResources().getBoolean(R.bool.config_apfDrop802_3Frames); |
| } |
| |
| /** |
| * @return An array of blacklisted EtherType, packets with EtherTypes within it will be dropped. |
| */ |
| public static @NonNull int[] getApfEthTypeBlackList(@NonNull Context context) { |
| return context.getResources().getIntArray(R.array.config_apfEthTypeBlackList); |
| } |
| } |