1 files changed, 0 insertions, 394 deletions

diff --git a/common/device/com/android/net/module/util/netlink/StructNlAttr.java b/common/device/com/android/net/module/util/netlink/StructNlAttr.java
deleted file mode 100644
index a9b64950..00000000
--- a/common/device/com/android/net/module/util/netlink/StructNlAttr.java
+++ /dev/null
@@ -1,394 +0,0 @@
-/*
- * 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 android.net.MacAddress;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import java.io.UnsupportedEncodingException;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.util.Arrays;
-
-/**
- * struct nlattr
- *
- * see: <linux_src>/include/uapi/linux/netlink.h
- *
- * @hide
- */
-public class StructNlAttr {
-    // Already aligned.
-    public static final int NLA_HEADERLEN  = 4;
-    public static final int NLA_F_NESTED   = (1 << 15);
-
-    /**
-     * Set carries nested attributes bit.
-     */
-    public static short makeNestedType(short type) {
-        return (short) (type | NLA_F_NESTED);
-    }
-
-    /**
-     * Peek and parse the netlink attribute from {@link ByteBuffer}.
-     *
-     * Return a (length, type) object only, without consuming any bytes in
-     * |byteBuffer| and without copying or interpreting any value bytes.
-     * This is used for scanning over a packed set of struct nlattr's,
-     * looking for instances of a particular type.
-     */
-    public static StructNlAttr peek(ByteBuffer byteBuffer) {
-        if (byteBuffer == null || byteBuffer.remaining() < NLA_HEADERLEN) {
-            return null;
-        }
-        final int baseOffset = byteBuffer.position();
-
-        final StructNlAttr struct = new StructNlAttr();
-        final ByteOrder originalOrder = byteBuffer.order();
-        byteBuffer.order(ByteOrder.nativeOrder());
-        try {
-            struct.nla_len = byteBuffer.getShort();
-            struct.nla_type = byteBuffer.getShort();
-        } finally {
-            byteBuffer.order(originalOrder);
-        }
-
-        byteBuffer.position(baseOffset);
-        if (struct.nla_len < NLA_HEADERLEN) {
-            // Malformed.
-            return null;
-        }
-        return struct;
-    }
-
-    /**
-     * Parse a netlink attribute from a {@link ByteBuffer}.
-     *
-     * @param byteBuffer The buffer from which to parse the netlink attriute.
-     * @return the parsed netlink attribute, or {@code null} if the netlink attribute
-     *         could not be parsed successfully (for example, if it was truncated).
-     */
-    public static StructNlAttr parse(ByteBuffer byteBuffer) {
-        final StructNlAttr struct = peek(byteBuffer);
-        if (struct == null || byteBuffer.remaining() < struct.getAlignedLength()) {
-            return null;
-        }
-
-        final int baseOffset = byteBuffer.position();
-        byteBuffer.position(baseOffset + NLA_HEADERLEN);
-
-        int valueLen = ((int) struct.nla_len) & 0xffff;
-        valueLen -= NLA_HEADERLEN;
-        if (valueLen > 0) {
-            struct.nla_value = new byte[valueLen];
-            byteBuffer.get(struct.nla_value, 0, valueLen);
-            byteBuffer.position(baseOffset + struct.getAlignedLength());
-        }
-        return struct;
-    }
-
-    /**
-     * Find next netlink attribute with a given type from {@link ByteBuffer}.
-     *
-     * @param attrType The given netlink attribute type is requested for.
-     * @param byteBuffer The buffer from which to find the netlink attribute.
-     * @return the found netlink attribute, or {@code null} if the netlink attribute could not be
-     *         found or parsed successfully (for example, if it was truncated).
-     */
-    @Nullable
-    public static StructNlAttr findNextAttrOfType(short attrType,
-            @Nullable ByteBuffer byteBuffer) {
-        while (byteBuffer != null && byteBuffer.remaining() > 0) {
-            final StructNlAttr nlAttr = StructNlAttr.peek(byteBuffer);
-            if (nlAttr == null) {
-                break;
-            }
-            if (nlAttr.nla_type == attrType) {
-                return StructNlAttr.parse(byteBuffer);
-            }
-            if (byteBuffer.remaining() < nlAttr.getAlignedLength()) {
-                break;
-            }
-            byteBuffer.position(byteBuffer.position() + nlAttr.getAlignedLength());
-        }
-        return null;
-    }
-
-    public short nla_len = (short) NLA_HEADERLEN;
-    public short nla_type;
-    public byte[] nla_value;
-
-    public StructNlAttr() {}
-
-    public StructNlAttr(short type, byte value) {
-        nla_type = type;
-        setValue(new byte[1]);
-        nla_value[0] = value;
-    }
-
-    public StructNlAttr(short type, short value) {
-        this(type, value, ByteOrder.nativeOrder());
-    }
-
-    public StructNlAttr(short type, short value, ByteOrder order) {
-        nla_type = type;
-        setValue(new byte[Short.BYTES]);
-        final ByteBuffer buf = getValueAsByteBuffer();
-        final ByteOrder originalOrder = buf.order();
-        try {
-            buf.order(order);
-            buf.putShort(value);
-        } finally {
-            buf.order(originalOrder);
-        }
-    }
-
-    public StructNlAttr(short type, int value) {
-        this(type, value, ByteOrder.nativeOrder());
-    }
-
-    public StructNlAttr(short type, int value, ByteOrder order) {
-        nla_type = type;
-        setValue(new byte[Integer.BYTES]);
-        final ByteBuffer buf = getValueAsByteBuffer();
-        final ByteOrder originalOrder = buf.order();
-        try {
-            buf.order(order);
-            buf.putInt(value);
-        } finally {
-            buf.order(originalOrder);
-        }
-    }
-
-    public StructNlAttr(short type, @NonNull final byte[] value) {
-        nla_type = type;
-        setValue(value);
-    }
-
-    public StructNlAttr(short type, @NonNull final InetAddress ip) {
-        nla_type = type;
-        setValue(ip.getAddress());
-    }
-
-    public StructNlAttr(short type, @NonNull final MacAddress mac) {
-        nla_type = type;
-        setValue(mac.toByteArray());
-    }
-
-    public StructNlAttr(short type, @NonNull final String string) {
-        nla_type = type;
-        byte[] value = null;
-        try {
-            final byte[] stringBytes = string.getBytes("UTF-8");
-            // Append '\0' at the end of interface name string bytes.
-            value = Arrays.copyOf(stringBytes, stringBytes.length + 1);
-        } catch (UnsupportedEncodingException ignored) {
-            // Do nothing.
-        } finally {
-            setValue(value);
-        }
-    }
-
-    public StructNlAttr(short type, StructNlAttr... nested) {
-        this();
-        nla_type = makeNestedType(type);
-
-        int payloadLength = 0;
-        for (StructNlAttr nla : nested) payloadLength += nla.getAlignedLength();
-        setValue(new byte[payloadLength]);
-
-        final ByteBuffer buf = getValueAsByteBuffer();
-        for (StructNlAttr nla : nested) {
-            nla.pack(buf);
-        }
-    }
-
-    /**
-     * Get aligned attribute length.
-     */
-    public int getAlignedLength() {
-        return NetlinkConstants.alignedLengthOf(nla_len);
-    }
-
-    /**
-     * Get attribute value as BE16.
-     */
-    public short getValueAsBe16(short defaultValue) {
-        final ByteBuffer byteBuffer = getValueAsByteBuffer();
-        if (byteBuffer == null || byteBuffer.remaining() != Short.BYTES) {
-            return defaultValue;
-        }
-        final ByteOrder originalOrder = byteBuffer.order();
-        try {
-            byteBuffer.order(ByteOrder.BIG_ENDIAN);
-            return byteBuffer.getShort();
-        } finally {
-            byteBuffer.order(originalOrder);
-        }
-    }
-
-    /**
-     * Get attribute value as BE32.
-     */
-    public int getValueAsBe32(int defaultValue) {
-        final ByteBuffer byteBuffer = getValueAsByteBuffer();
-        if (byteBuffer == null || byteBuffer.remaining() != Integer.BYTES) {
-            return defaultValue;
-        }
-        final ByteOrder originalOrder = byteBuffer.order();
-        try {
-            byteBuffer.order(ByteOrder.BIG_ENDIAN);
-            return byteBuffer.getInt();
-        } finally {
-            byteBuffer.order(originalOrder);
-        }
-    }
-
-    /**
-     * Get attribute value as ByteBuffer.
-     */
-    public ByteBuffer getValueAsByteBuffer() {
-        if (nla_value == null) return null;
-        final ByteBuffer byteBuffer = ByteBuffer.wrap(nla_value);
-        // By convention, all buffers in this library are in native byte order because netlink is in
-        // native byte order. It's the order that is used by NetlinkSocket.recvMessage and the only
-        // order accepted by NetlinkMessage.parse.
-        byteBuffer.order(ByteOrder.nativeOrder());
-        return byteBuffer;
-    }
-
-    /**
-     * Get attribute value as byte.
-     */
-    public byte getValueAsByte(byte defaultValue) {
-        final ByteBuffer byteBuffer = getValueAsByteBuffer();
-        if (byteBuffer == null || byteBuffer.remaining() != Byte.BYTES) {
-            return defaultValue;
-        }
-        return getValueAsByteBuffer().get();
-    }
-
-    /**
-     * Get attribute value as Integer, or null if malformed (e.g., length is not 4 bytes).
-     */
-    public Integer getValueAsInteger() {
-        final ByteBuffer byteBuffer = getValueAsByteBuffer();
-        if (byteBuffer == null || byteBuffer.remaining() != Integer.BYTES) {
-            return null;
-        }
-        return byteBuffer.getInt();
-    }
-
-    /**
-     * Get attribute value as Int, default value if malformed.
-     */
-    public int getValueAsInt(int defaultValue) {
-        final Integer value = getValueAsInteger();
-        return (value != null) ? value : defaultValue;
-    }
-
-    /**
-     * Get attribute value as InetAddress.
-     *
-     * @return the InetAddress instance representation of attribute value or null if IP address
-     *         is of illegal length.
-     */
-    @Nullable
-    public InetAddress getValueAsInetAddress() {
-        if (nla_value == null) return null;
-
-        try {
-            return InetAddress.getByAddress(nla_value);
-        } catch (UnknownHostException ignored) {
-            return null;
-        }
-    }
-
-    /**
-     * Get attribute value as MacAddress.
-     *
-     * @return the MacAddress instance representation of attribute value or null if the given byte
-     *         array is not a valid representation(e.g, not all link layers have 6-byte link-layer
-     *         addresses)
-     */
-    @Nullable
-    public MacAddress getValueAsMacAddress() {
-        if (nla_value == null) return null;
-
-        try {
-            return MacAddress.fromBytes(nla_value);
-        } catch (IllegalArgumentException ignored) {
-            return null;
-        }
-    }
-
-    /**
-     * Get attribute value as a unicode string.
-     *
-     * @return a unicode string or null if UTF-8 charset is not supported.
-     */
-    @Nullable
-    public String getValueAsString() {
-        if (nla_value == null) return null;
-        // Check the attribute value length after removing string termination flag '\0'.
-        // This assumes that all netlink strings are null-terminated.
-        if (nla_value.length < (nla_len - NLA_HEADERLEN - 1)) return null;
-
-        try {
-            final byte[] array = Arrays.copyOf(nla_value, nla_len - NLA_HEADERLEN - 1);
-            return new String(array, "UTF-8");
-        } catch (UnsupportedEncodingException | NegativeArraySizeException ignored) {
-            return null;
-        }
-    }
-
-    /**
-     * Write the netlink attribute to {@link ByteBuffer}.
-     */
-    public void pack(ByteBuffer byteBuffer) {
-        final ByteOrder originalOrder = byteBuffer.order();
-        final int originalPosition = byteBuffer.position();
-
-        byteBuffer.order(ByteOrder.nativeOrder());
-        try {
-            byteBuffer.putShort(nla_len);
-            byteBuffer.putShort(nla_type);
-            if (nla_value != null) byteBuffer.put(nla_value);
-        } finally {
-            byteBuffer.order(originalOrder);
-        }
-        byteBuffer.position(originalPosition + getAlignedLength());
-    }
-
-    private void setValue(byte[] value) {
-        nla_value = value;
-        nla_len = (short) (NLA_HEADERLEN + ((nla_value != null) ? nla_value.length : 0));
-    }
-
-    @Override
-    public String toString() {
-        return "StructNlAttr{ "
-                + "nla_len{" + nla_len + "}, "
-                + "nla_type{" + nla_type + "}, "
-                + "nla_value{" + NetlinkConstants.hexify(nla_value) + "}, "
-                + "}";
-    }
-}