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Diffstat (limited to 'common/device/com/android/net/module/util/netlink/RtNetlinkRouteMessage.java')
-rw-r--r--common/device/com/android/net/module/util/netlink/RtNetlinkRouteMessage.java217
1 files changed, 0 insertions, 217 deletions
diff --git a/common/device/com/android/net/module/util/netlink/RtNetlinkRouteMessage.java b/common/device/com/android/net/module/util/netlink/RtNetlinkRouteMessage.java
deleted file mode 100644
index 9acac69c..00000000
--- a/common/device/com/android/net/module/util/netlink/RtNetlinkRouteMessage.java
+++ /dev/null
@@ -1,217 +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 android.system.OsConstants.AF_INET;
-import static android.system.OsConstants.AF_INET6;
-
-import static com.android.net.module.util.NetworkStackConstants.IPV4_ADDR_ANY;
-import static com.android.net.module.util.NetworkStackConstants.IPV6_ADDR_ANY;
-
-import android.annotation.SuppressLint;
-import android.net.IpPrefix;
-import android.system.OsConstants;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-import java.net.InetAddress;
-import java.nio.ByteBuffer;
-
-/**
- * A NetlinkMessage subclass for rtnetlink route messages.
- *
- * RtNetlinkRouteMessage.parse() must be called with a ByteBuffer that contains exactly one
- * netlink message.
- *
- * see also:
- *
- * include/uapi/linux/rtnetlink.h
- *
- * @hide
- */
-public class RtNetlinkRouteMessage extends NetlinkMessage {
- public static final short RTA_DST = 1;
- public static final short RTA_OIF = 4;
- public static final short RTA_GATEWAY = 5;
- public static final short RTA_CACHEINFO = 12;
-
- private int mIfindex;
- @NonNull
- private StructRtMsg mRtmsg;
- @NonNull
- private IpPrefix mDestination;
- @Nullable
- private InetAddress mGateway;
- @Nullable
- private StructRtaCacheInfo mRtaCacheInfo;
-
- private RtNetlinkRouteMessage(StructNlMsgHdr header) {
- super(header);
- mRtmsg = null;
- mDestination = null;
- mGateway = null;
- mIfindex = 0;
- mRtaCacheInfo = null;
- }
-
- public int getInterfaceIndex() {
- return mIfindex;
- }
-
- @NonNull
- public StructRtMsg getRtMsgHeader() {
- return mRtmsg;
- }
-
- @NonNull
- public IpPrefix getDestination() {
- return mDestination;
- }
-
- @Nullable
- public InetAddress getGateway() {
- return mGateway;
- }
-
- @Nullable
- public StructRtaCacheInfo getRtaCacheInfo() {
- return mRtaCacheInfo;
- }
-
- /**
- * Check whether the address families of destination and gateway match rtm_family in
- * StructRtmsg.
- *
- * For example, IPv4-mapped IPv6 addresses as an IPv6 address will be always converted to IPv4
- * address, that's incorrect when upper layer creates a new {@link RouteInfo} class instance
- * for IPv6 route with the converted IPv4 gateway.
- */
- private static boolean matchRouteAddressFamily(@NonNull final InetAddress address,
- int family) {
- return ((address instanceof Inet4Address) && (family == AF_INET))
- || ((address instanceof Inet6Address) && (family == AF_INET6));
- }
-
- /**
- * Parse rtnetlink route 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.
- */
- @SuppressLint("NewApi")
- @Nullable
- public static RtNetlinkRouteMessage parse(@NonNull final StructNlMsgHdr header,
- @NonNull final ByteBuffer byteBuffer) {
- final RtNetlinkRouteMessage routeMsg = new RtNetlinkRouteMessage(header);
-
- routeMsg.mRtmsg = StructRtMsg.parse(byteBuffer);
- if (routeMsg.mRtmsg == null) return null;
- int rtmFamily = routeMsg.mRtmsg.family;
-
- // RTA_DST
- final int baseOffset = byteBuffer.position();
- StructNlAttr nlAttr = StructNlAttr.findNextAttrOfType(RTA_DST, byteBuffer);
- if (nlAttr != null) {
- final InetAddress destination = nlAttr.getValueAsInetAddress();
- // If the RTA_DST attribute is malformed, return null.
- if (destination == null) return null;
- // If the address family of destination doesn't match rtm_family, return null.
- if (!matchRouteAddressFamily(destination, rtmFamily)) return null;
- routeMsg.mDestination = new IpPrefix(destination, routeMsg.mRtmsg.dstLen);
- } else if (rtmFamily == AF_INET) {
- routeMsg.mDestination = new IpPrefix(IPV4_ADDR_ANY, 0);
- } else if (rtmFamily == AF_INET6) {
- routeMsg.mDestination = new IpPrefix(IPV6_ADDR_ANY, 0);
- } else {
- return null;
- }
-
- // RTA_GATEWAY
- byteBuffer.position(baseOffset);
- nlAttr = StructNlAttr.findNextAttrOfType(RTA_GATEWAY, byteBuffer);
- if (nlAttr != null) {
- routeMsg.mGateway = nlAttr.getValueAsInetAddress();
- // If the RTA_GATEWAY attribute is malformed, return null.
- if (routeMsg.mGateway == null) return null;
- // If the address family of gateway doesn't match rtm_family, return null.
- if (!matchRouteAddressFamily(routeMsg.mGateway, rtmFamily)) return null;
- }
-
- // RTA_OIF
- byteBuffer.position(baseOffset);
- nlAttr = StructNlAttr.findNextAttrOfType(RTA_OIF, byteBuffer);
- if (nlAttr != null) {
- // Any callers that deal with interface names are responsible for converting
- // the interface index to a name themselves. This may not succeed or may be
- // incorrect, because the interface might have been deleted, or even deleted
- // and re-added with a different index, since the netlink message was sent.
- routeMsg.mIfindex = nlAttr.getValueAsInt(0 /* 0 isn't a valid ifindex */);
- }
-
- // RTA_CACHEINFO
- byteBuffer.position(baseOffset);
- nlAttr = StructNlAttr.findNextAttrOfType(RTA_CACHEINFO, byteBuffer);
- if (nlAttr != null) {
- routeMsg.mRtaCacheInfo = StructRtaCacheInfo.parse(nlAttr.getValueAsByteBuffer());
- }
-
- return routeMsg;
- }
-
- /**
- * Write a rtnetlink address message to {@link ByteBuffer}.
- */
- @VisibleForTesting
- protected void pack(ByteBuffer byteBuffer) {
- getHeader().pack(byteBuffer);
- mRtmsg.pack(byteBuffer);
-
- final StructNlAttr destination = new StructNlAttr(RTA_DST, mDestination.getAddress());
- destination.pack(byteBuffer);
-
- if (mGateway != null) {
- final StructNlAttr gateway = new StructNlAttr(RTA_GATEWAY, mGateway.getAddress());
- gateway.pack(byteBuffer);
- }
- if (mIfindex != 0) {
- final StructNlAttr ifindex = new StructNlAttr(RTA_OIF, mIfindex);
- ifindex.pack(byteBuffer);
- }
- if (mRtaCacheInfo != null) {
- final StructNlAttr cacheInfo = new StructNlAttr(RTA_CACHEINFO,
- mRtaCacheInfo.writeToBytes());
- cacheInfo.pack(byteBuffer);
- }
- }
-
- @Override
- public String toString() {
- return "RtNetlinkRouteMessage{ "
- + "nlmsghdr{" + mHeader.toString(OsConstants.NETLINK_ROUTE) + "}, "
- + "Rtmsg{" + mRtmsg.toString() + "}, "
- + "destination{" + mDestination.getAddress().getHostAddress() + "}, "
- + "gateway{" + (mGateway == null ? "" : mGateway.getHostAddress()) + "}, "
- + "ifindex{" + mIfindex + "}, "
- + "rta_cacheinfo{" + (mRtaCacheInfo == null ? "" : mRtaCacheInfo.toString()) + "} "
- + "}";
- }
-}
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