1 files changed, 0 insertions, 263 deletions
diff --git a/common/device/com/android/net/module/util/netlink/RtNetlinkAddressMessage.java b/common/device/com/android/net/module/util/netlink/RtNetlinkAddressMessage.java
deleted file mode 100644
index cbe0ab0e..00000000
--- a/common/device/com/android/net/module/util/netlink/RtNetlinkAddressMessage.java
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- * Copyright (C) 2021 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 static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_ACK;
-import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_REPLACE;
-import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_REQUEST;
-
-import android.system.OsConstants;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-
-import com.android.net.module.util.HexDump;
-
-import java.net.Inet6Address;
-import java.net.InetAddress;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.util.Objects;
-
-/**
- * A NetlinkMessage subclass for rtnetlink address messages.
- *
- * RtNetlinkAddressMessage.parse() must be called with a ByteBuffer that contains exactly one
- * netlink message.
- *
- * see also:
- *
- *     include/uapi/linux/rtnetlink.h
- *
- * @hide
- */
-public class RtNetlinkAddressMessage extends NetlinkMessage {
-    public static final short IFA_ADDRESS        = 1;
-    public static final short IFA_CACHEINFO      = 6;
-    public static final short IFA_FLAGS          = 8;
-
-    private int mFlags;
-    @NonNull
-    private StructIfaddrMsg mIfaddrmsg;
-    @NonNull
-    private InetAddress mIpAddress;
-    @Nullable
-    private StructIfacacheInfo mIfacacheInfo;
-
-    @VisibleForTesting
-    public RtNetlinkAddressMessage(@NonNull final StructNlMsgHdr header,
-            @NonNull final StructIfaddrMsg ifaddrMsg,
-            @NonNull final InetAddress ipAddress,
-            @Nullable final StructIfacacheInfo structIfacacheInfo,
-            int flags) {
-        super(header);
-        mIfaddrmsg = ifaddrMsg;
-        mIpAddress = ipAddress;
-        mIfacacheInfo = structIfacacheInfo;
-        mFlags = flags;
-    }
-    private RtNetlinkAddressMessage(@NonNull StructNlMsgHdr header) {
-        this(header, null, null, null, 0);
-    }
-
-    public int getFlags() {
-        return mFlags;
-    }
-
-    @NonNull
-    public StructIfaddrMsg getIfaddrHeader() {
-        return mIfaddrmsg;
-    }
-
-    @NonNull
-    public InetAddress getIpAddress() {
-        return mIpAddress;
-    }
-
-    @Nullable
-    public StructIfacacheInfo getIfacacheInfo() {
-        return mIfacacheInfo;
-    }
-
-    /**
-     * Parse rtnetlink address message from {@link ByteBuffer}. This method must be called with a
-     * ByteBuffer that contains exactly one netlink message.
-     *
-     * @param header netlink message header.
-     * @param byteBuffer the ByteBuffer instance that wraps the raw netlink message bytes.
-     */
-    @Nullable
-    public static RtNetlinkAddressMessage parse(@NonNull final StructNlMsgHdr header,
-            @NonNull final ByteBuffer byteBuffer) {
-        final RtNetlinkAddressMessage addrMsg = new RtNetlinkAddressMessage(header);
-
-        addrMsg.mIfaddrmsg = StructIfaddrMsg.parse(byteBuffer);
-        if (addrMsg.mIfaddrmsg == null) return null;
-
-        // IFA_ADDRESS
-        final int baseOffset = byteBuffer.position();
-        StructNlAttr nlAttr = StructNlAttr.findNextAttrOfType(IFA_ADDRESS, byteBuffer);
-        if (nlAttr == null) return null;
-        addrMsg.mIpAddress = nlAttr.getValueAsInetAddress();
-        if (addrMsg.mIpAddress == null) return null;
-
-        // IFA_CACHEINFO
-        byteBuffer.position(baseOffset);
-        nlAttr = StructNlAttr.findNextAttrOfType(IFA_CACHEINFO, byteBuffer);
-        if (nlAttr != null) {
-            addrMsg.mIfacacheInfo = StructIfacacheInfo.parse(nlAttr.getValueAsByteBuffer());
-        }
-
-        // The first 8 bits of flags are in the ifaddrmsg.
-        addrMsg.mFlags = addrMsg.mIfaddrmsg.flags;
-        // IFA_FLAGS. All the flags are in the IF_FLAGS attribute. This should always be present,
-        // and will overwrite the flags set above.
-        byteBuffer.position(baseOffset);
-        nlAttr = StructNlAttr.findNextAttrOfType(IFA_FLAGS, byteBuffer);
-        if (nlAttr == null) return null;
-        final Integer value = nlAttr.getValueAsInteger();
-        if (value == null) return null;
-        addrMsg.mFlags = value;
-
-        return addrMsg;
-    }
-
-    /**
-     * Write a rtnetlink address message to {@link ByteBuffer}.
-     */
-    @VisibleForTesting
-    protected void pack(ByteBuffer byteBuffer) {
-        getHeader().pack(byteBuffer);
-        mIfaddrmsg.pack(byteBuffer);
-
-        final StructNlAttr address = new StructNlAttr(IFA_ADDRESS, mIpAddress);
-        address.pack(byteBuffer);
-
-        if (mIfacacheInfo != null) {
-            final StructNlAttr cacheInfo = new StructNlAttr(IFA_CACHEINFO,
-                    mIfacacheInfo.writeToBytes());
-            cacheInfo.pack(byteBuffer);
-        }
-
-        // If IFA_FLAGS attribute isn't present on the wire at parsing netlink message, it will
-        // still be packed to ByteBuffer even if the flag is 0.
-        final StructNlAttr flags = new StructNlAttr(IFA_FLAGS, mFlags);
-        flags.pack(byteBuffer);
-    }
-
-    /**
-     * A convenience method to create a RTM_NEWADDR message.
-     */
-    public static byte[] newRtmNewAddressMessage(int seqNo, @NonNull final InetAddress ip,
-            short prefixlen, int flags, byte scope, int ifIndex, long preferred, long valid) {
-        Objects.requireNonNull(ip, "IP address to be set via netlink message cannot be null");
-
-        final StructNlMsgHdr nlmsghdr = new StructNlMsgHdr();
-        nlmsghdr.nlmsg_type = NetlinkConstants.RTM_NEWADDR;
-        nlmsghdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_REPLACE | NLM_F_ACK;
-        nlmsghdr.nlmsg_seq = seqNo;
-
-        final RtNetlinkAddressMessage msg = new RtNetlinkAddressMessage(nlmsghdr);
-        final byte family =
-                (byte) ((ip instanceof Inet6Address) ? OsConstants.AF_INET6 : OsConstants.AF_INET);
-        // IFA_FLAGS attribute is always present within this method, just set flags from
-        // ifaddrmsg to 0. kernel will prefer the flags from IFA_FLAGS attribute.
-        msg.mIfaddrmsg =
-                new StructIfaddrMsg(family, prefixlen, (short) 0 /* flags */, scope, ifIndex);
-        msg.mIpAddress = ip;
-        msg.mIfacacheInfo = new StructIfacacheInfo(preferred, valid, 0 /* cstamp */,
-                0 /* tstamp */);
-        msg.mFlags = flags;
-
-        final byte[] bytes = new byte[msg.getRequiredSpace()];
-        nlmsghdr.nlmsg_len = bytes.length;
-        final ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
-        byteBuffer.order(ByteOrder.nativeOrder());
-        msg.pack(byteBuffer);
-        return bytes;
-    }
-
-    /**
-     * A convenience method to create a RTM_DELADDR message.
-     */
-    public static byte[] newRtmDelAddressMessage(int seqNo, @NonNull final InetAddress ip,
-            short prefixlen, int ifIndex) {
-        Objects.requireNonNull(ip, "IP address to be deleted via netlink message cannot be null");
-
-        final int ifaAddrAttrLength = NetlinkConstants.alignedLengthOf(
-                StructNlAttr.NLA_HEADERLEN + ip.getAddress().length);
-        final int length = StructNlMsgHdr.STRUCT_SIZE + StructIfaddrMsg.STRUCT_SIZE
-                + ifaAddrAttrLength;
-        final byte[] bytes = new byte[length];
-        final ByteBuffer byteBuffer = ByteBuffer.wrap(bytes);
-        byteBuffer.order(ByteOrder.nativeOrder());
-
-        final StructNlMsgHdr nlmsghdr = new StructNlMsgHdr();
-        nlmsghdr.nlmsg_len = length;
-        nlmsghdr.nlmsg_type = NetlinkConstants.RTM_DELADDR;
-        nlmsghdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
-        nlmsghdr.nlmsg_seq = seqNo;
-        nlmsghdr.pack(byteBuffer);
-
-        final byte family =
-                (byte) ((ip instanceof Inet6Address) ? OsConstants.AF_INET6 : OsConstants.AF_INET);
-        // Actually kernel ignores scope and flags(only deal with IFA_F_MANAGETEMPADDR, it
-        // indicates that all relevant IPv6 temporary addresses should be deleted as well when
-        // user space intends to delete a global IPv6 address with IFA_F_MANAGETEMPADDR), so
-        // far IFA_F_MANAGETEMPADDR flag isn't used in user space, it's fine to ignore it.
-        // However, we need to add IFA_FLAGS attribute in RTM_DELADDR if flags parsing should
-        // be supported in the future.
-        final StructIfaddrMsg ifaddrmsg = new StructIfaddrMsg(family, prefixlen,
-                (short) 0 /* flags */, (short) 0 /* scope */, ifIndex);
-        ifaddrmsg.pack(byteBuffer);
-
-        final StructNlAttr address = new StructNlAttr(IFA_ADDRESS, ip);
-        address.pack(byteBuffer);
-
-        return bytes;
-    }
-
-    // This function helper gives the required buffer size for IFA_ADDRESS, IFA_CACHEINFO and
-    // IFA_FLAGS attributes encapsulation. However, that's not a mandatory requirement for all
-    // RtNetlinkAddressMessage, e.g. RTM_DELADDR sent from user space to kernel to delete an
-    // IP address only requires IFA_ADDRESS attribute. The caller should check if these attributes
-    // are necessary to carry when constructing a RtNetlinkAddressMessage.
-    private int getRequiredSpace() {
-        int spaceRequired = StructNlMsgHdr.STRUCT_SIZE + StructIfaddrMsg.STRUCT_SIZE;
-        // IFA_ADDRESS attr
-        spaceRequired += NetlinkConstants.alignedLengthOf(
-                StructNlAttr.NLA_HEADERLEN + mIpAddress.getAddress().length);
-        // IFA_CACHEINFO attr
-        spaceRequired += NetlinkConstants.alignedLengthOf(
-                StructNlAttr.NLA_HEADERLEN + StructIfacacheInfo.STRUCT_SIZE);
-        // IFA_FLAGS "u32" attr
-        spaceRequired += StructNlAttr.NLA_HEADERLEN + 4;
-        return spaceRequired;
-    }
-
-    @Override
-    public String toString() {
-        return "RtNetlinkAddressMessage{ "
-                + "nlmsghdr{" + mHeader.toString(OsConstants.NETLINK_ROUTE) + "}, "
-                + "Ifaddrmsg{" + mIfaddrmsg.toString() + "}, "
-                + "IP Address{" + mIpAddress.getHostAddress() + "}, "
-                + "IfacacheInfo{" + (mIfacacheInfo == null ? "" : mIfacacheInfo.toString()) + "}, "
-                + "Address Flags{" + HexDump.toHexString(mFlags) + "} "
-                + "}";
-    }
-}