5d62167efc
In order to get the tcp_info via netlink socket from kernel, NetworkStack needs to use netlink class to pack and parse the InetDiagReq. Current design hardcodes ididag_ext field in InetDiagReqV2. The structure is also not allowed to take null id to not to specify certain socket. Update the constructor and backward support exising constructor. Bug: 136162280 Test: atest FrameworksNetTests NetworkStackTests Change-Id: Id66da1797da183ae3d99073f80bad1df929946dc
98 lines
3.5 KiB
Java
98 lines
3.5 KiB
Java
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.net.netlink;
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import android.annotation.Nullable;
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import java.net.InetSocketAddress;
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import java.nio.ByteBuffer;
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/**
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* struct inet_diag_req_v2
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*
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* see <linux_src>/include/uapi/linux/inet_diag.h
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*
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* struct inet_diag_req_v2 {
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* __u8 sdiag_family;
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* __u8 sdiag_protocol;
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* __u8 idiag_ext;
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* __u8 pad;
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* __u32 idiag_states;
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* struct inet_diag_sockid id;
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* };
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*
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* @hide
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*/
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public class StructInetDiagReqV2 {
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public static final int STRUCT_SIZE = 8 + StructInetDiagSockId.STRUCT_SIZE;
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private final byte mSdiagFamily;
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private final byte mSdiagProtocol;
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private final byte mIdiagExt;
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private final byte mPad;
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private final StructInetDiagSockId mId;
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private final int mState;
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public static final int INET_DIAG_REQ_V2_ALL_STATES = (int) 0xffffffff;
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public StructInetDiagReqV2(int protocol, InetSocketAddress local, InetSocketAddress remote,
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int family) {
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this(protocol, local, remote, family, 0 /* pad */, 0 /* extension */,
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INET_DIAG_REQ_V2_ALL_STATES);
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}
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public StructInetDiagReqV2(int protocol, @Nullable InetSocketAddress local,
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@Nullable InetSocketAddress remote, int family, int pad, int extension, int state)
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throws NullPointerException {
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mSdiagFamily = (byte) family;
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mSdiagProtocol = (byte) protocol;
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// Request for all sockets if no specific socket is requested. Specify the local and remote
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// socket address information for target request socket.
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if ((local == null) != (remote == null)) {
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throw new NullPointerException("Local and remote must be both null or both non-null");
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}
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mId = ((local != null && remote != null) ? new StructInetDiagSockId(local, remote) : null);
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mPad = (byte) pad;
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mIdiagExt = (byte) extension;
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mState = state;
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}
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public void pack(ByteBuffer byteBuffer) {
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// The ByteOrder must have already been set by the caller.
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byteBuffer.put((byte) mSdiagFamily);
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byteBuffer.put((byte) mSdiagProtocol);
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byteBuffer.put((byte) mIdiagExt);
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byteBuffer.put((byte) mPad);
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byteBuffer.putInt(mState);
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if (mId != null) mId.pack(byteBuffer);
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}
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@Override
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public String toString() {
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final String familyStr = NetlinkConstants.stringForAddressFamily(mSdiagFamily);
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final String protocolStr = NetlinkConstants.stringForAddressFamily(mSdiagProtocol);
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return "StructInetDiagReqV2{ "
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+ "sdiag_family{" + familyStr + "}, "
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+ "sdiag_protocol{" + protocolStr + "}, "
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+ "idiag_ext{" + mIdiagExt + ")}, "
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+ "pad{" + mPad + "}, "
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+ "idiag_states{" + Integer.toHexString(mState) + "}, "
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+ ((mId != null) ? mId.toString() : "inet_diag_sockid=null")
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+ "}";
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}
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}
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