| /* |
| * Copyright (C) 2019 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 com.android.net.module.util.netlink; |
| |
| import androidx.annotation.NonNull; |
| import androidx.annotation.Nullable; |
| |
| import java.nio.ByteBuffer; |
| |
| /** |
| * A NetlinkMessage subclass for netlink error messages. |
| * |
| * @hide |
| */ |
| public class NetlinkErrorMessage extends NetlinkMessage { |
| |
| /** |
| * Parse a netlink error message from a {@link ByteBuffer}. |
| * |
| * @param byteBuffer The buffer from which to parse the netlink error message. |
| * @return the parsed netlink error message, or {@code null} if the netlink error message |
| * could not be parsed successfully (for example, if it was truncated). |
| */ |
| @Nullable |
| public static NetlinkErrorMessage parse(@NonNull StructNlMsgHdr header, |
| @NonNull ByteBuffer byteBuffer) { |
| final NetlinkErrorMessage errorMsg = new NetlinkErrorMessage(header); |
| |
| errorMsg.mNlMsgErr = StructNlMsgErr.parse(byteBuffer); |
| if (errorMsg.mNlMsgErr == null) { |
| return null; |
| } |
| |
| return errorMsg; |
| } |
| |
| private StructNlMsgErr mNlMsgErr; |
| |
| NetlinkErrorMessage(@NonNull StructNlMsgHdr header) { |
| super(header); |
| mNlMsgErr = null; |
| } |
| |
| public StructNlMsgErr getNlMsgError() { |
| return mNlMsgErr; |
| } |
| |
| @Override |
| public String toString() { |
| return "NetlinkErrorMessage{ " |
| + "nlmsghdr{" + (mHeader == null ? "" : mHeader.toString()) + "}, " |
| + "nlmsgerr{" + (mNlMsgErr == null ? "" : mNlMsgErr.toString()) + "} " |
| + "}"; |
| } |
| } |