1 files changed, 0 insertions, 171 deletions
diff --git a/common/device/com/android/net/module/util/netlink/NetlinkMessage.java b/common/device/com/android/net/module/util/netlink/NetlinkMessage.java
deleted file mode 100644
index 9e1e26e7..00000000
--- a/common/device/com/android/net/module/util/netlink/NetlinkMessage.java
+++ /dev/null
@@ -1,171 +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.system.OsConstants;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import java.nio.ByteBuffer;
-
-/**
- * NetlinkMessage base class for other, more specific netlink message types.
- *
- * Classes that extend NetlinkMessage should:
- *     - implement a public static parse(StructNlMsgHdr, ByteBuffer) method
- *     - returning either null (parse errors) or a new object of the subclass
- *       type (cast-able to NetlinkMessage)
- *
- * NetlinkMessage.parse() should be updated to know which nlmsg_type values
- * correspond with which message subclasses.
- *
- * @hide
- */
-public class NetlinkMessage {
-    private static final String TAG = "NetlinkMessage";
-
-    /**
-     * Parsing netlink messages for reserved control message or specific netlink message. The
-     * netlink family is required for parsing specific netlink message. See man-pages/netlink.
-     */
-    @Nullable
-    public static NetlinkMessage parse(@NonNull ByteBuffer byteBuffer, int nlFamily) {
-        final int startPosition = (byteBuffer != null) ? byteBuffer.position() : -1;
-        final StructNlMsgHdr nlmsghdr = StructNlMsgHdr.parse(byteBuffer);
-        if (nlmsghdr == null) {
-            return null;
-        }
-
-        final int messageLength = NetlinkConstants.alignedLengthOf(nlmsghdr.nlmsg_len);
-        final int payloadLength = messageLength - StructNlMsgHdr.STRUCT_SIZE;
-        if (payloadLength < 0 || payloadLength > byteBuffer.remaining()) {
-            // Malformed message or runt buffer.  Pretend the buffer was consumed.
-            byteBuffer.position(byteBuffer.limit());
-            return null;
-        }
-
-        // Reserved control messages. The netlink family is ignored.
-        // See NLMSG_MIN_TYPE in include/uapi/linux/netlink.h.
-        if (nlmsghdr.nlmsg_type <= NetlinkConstants.NLMSG_MAX_RESERVED) {
-            return parseCtlMessage(nlmsghdr, byteBuffer, payloadLength);
-        }
-
-        // Netlink family messages. The netlink family is required. Note that the reason for using
-        // if-statement is that switch-case can't be used because the OsConstants.NETLINK_* are
-        // not constant.
-        final NetlinkMessage parsed;
-        if (nlFamily == OsConstants.NETLINK_ROUTE) {
-            parsed = parseRtMessage(nlmsghdr, byteBuffer);
-        } else if (nlFamily == OsConstants.NETLINK_INET_DIAG) {
-            parsed = parseInetDiagMessage(nlmsghdr, byteBuffer);
-        } else if (nlFamily == OsConstants.NETLINK_NETFILTER) {
-            parsed = parseNfMessage(nlmsghdr, byteBuffer);
-        } else {
-            parsed = null;
-        }
-
-        // Advance to the end of the message, regardless of whether the parsing code consumed
-        // all of it or not.
-        byteBuffer.position(startPosition + messageLength);
-
-        return parsed;
-    }
-
-    @NonNull
-    protected final StructNlMsgHdr mHeader;
-
-    public NetlinkMessage(@NonNull StructNlMsgHdr nlmsghdr) {
-        mHeader = nlmsghdr;
-    }
-
-    @NonNull
-    public StructNlMsgHdr getHeader() {
-        return mHeader;
-    }
-
-    @Override
-    public String toString() {
-        // The netlink family is not provided to StructNlMsgHdr#toString because NetlinkMessage
-        // doesn't store the information. So the netlink message type can't be transformed into
-        // a string by StructNlMsgHdr#toString and just keep as an integer. The specific message
-        // which inherits NetlinkMessage could override NetlinkMessage#toString and provide the
-        // specific netlink family to StructNlMsgHdr#toString.
-        return "NetlinkMessage{" + mHeader.toString() + "}";
-    }
-
-    @NonNull
-    private static NetlinkMessage parseCtlMessage(@NonNull StructNlMsgHdr nlmsghdr,
-            @NonNull ByteBuffer byteBuffer, int payloadLength) {
-        switch (nlmsghdr.nlmsg_type) {
-            case NetlinkConstants.NLMSG_ERROR:
-                return (NetlinkMessage) NetlinkErrorMessage.parse(nlmsghdr, byteBuffer);
-            default: {
-                // Other netlink control messages. Just parse the header for now,
-                // pretending the whole message was consumed.
-                byteBuffer.position(byteBuffer.position() + payloadLength);
-                return new NetlinkMessage(nlmsghdr);
-            }
-        }
-    }
-
-    @Nullable
-    private static NetlinkMessage parseRtMessage(@NonNull StructNlMsgHdr nlmsghdr,
-            @NonNull ByteBuffer byteBuffer) {
-        switch (nlmsghdr.nlmsg_type) {
-            case NetlinkConstants.RTM_NEWLINK:
-            case NetlinkConstants.RTM_DELLINK:
-                return (NetlinkMessage) RtNetlinkLinkMessage.parse(nlmsghdr, byteBuffer);
-            case NetlinkConstants.RTM_NEWADDR:
-            case NetlinkConstants.RTM_DELADDR:
-                return (NetlinkMessage) RtNetlinkAddressMessage.parse(nlmsghdr, byteBuffer);
-            case NetlinkConstants.RTM_NEWROUTE:
-            case NetlinkConstants.RTM_DELROUTE:
-                return (NetlinkMessage) RtNetlinkRouteMessage.parse(nlmsghdr, byteBuffer);
-            case NetlinkConstants.RTM_NEWNEIGH:
-            case NetlinkConstants.RTM_DELNEIGH:
-            case NetlinkConstants.RTM_GETNEIGH:
-                return (NetlinkMessage) RtNetlinkNeighborMessage.parse(nlmsghdr, byteBuffer);
-            case NetlinkConstants.RTM_NEWNDUSEROPT:
-                return (NetlinkMessage) NduseroptMessage.parse(nlmsghdr, byteBuffer);
-            default: return null;
-        }
-    }
-
-    @Nullable
-    private static NetlinkMessage parseInetDiagMessage(@NonNull StructNlMsgHdr nlmsghdr,
-            @NonNull ByteBuffer byteBuffer) {
-        switch (nlmsghdr.nlmsg_type) {
-            case NetlinkConstants.SOCK_DIAG_BY_FAMILY:
-                return (NetlinkMessage) InetDiagMessage.parse(nlmsghdr, byteBuffer);
-            default: return null;
-        }
-    }
-
-    @Nullable
-    private static NetlinkMessage parseNfMessage(@NonNull StructNlMsgHdr nlmsghdr,
-            @NonNull ByteBuffer byteBuffer) {
-        switch (nlmsghdr.nlmsg_type) {
-            case NetlinkConstants.NFNL_SUBSYS_CTNETLINK << 8
-                    | NetlinkConstants.IPCTNL_MSG_CT_NEW:
-            case NetlinkConstants.NFNL_SUBSYS_CTNETLINK << 8
-                    | NetlinkConstants.IPCTNL_MSG_CT_DELETE:
-                return (NetlinkMessage) ConntrackMessage.parse(nlmsghdr, byteBuffer);
-            default: return null;
-        }
-    }
-}