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/*
* Copyright (C) 2015 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.NETLINK_ROUTE;
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 static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import androidx.test.filters.SmallTest;
import androidx.test.runner.AndroidJUnit4;
import libcore.util.HexEncoding;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
@RunWith(AndroidJUnit4.class)
@SmallTest
public class NetlinkErrorMessageTest {
private static final String TAG = "NetlinkErrorMessageTest";
// Hexadecimal representation of packet capture.
public static final String NLM_ERROR_OK_HEX =
// struct nlmsghdr
"24000000" + // length = 36
"0200" + // type = 2 (NLMSG_ERROR)
"0000" + // flags
"26350000" + // seqno
"64100000" + // pid = userspace process
// error integer
"00000000" + // "errno" (0 == OK)
// struct nlmsghdr
"30000000" + // length (48) of original request
"1C00" + // type = 28 (RTM_NEWNEIGH)
"0501" + // flags (NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE)
"26350000" + // seqno
"00000000"; // pid = kernel
public static final byte[] NLM_ERROR_OK =
HexEncoding.decode(NLM_ERROR_OK_HEX.toCharArray(), false);
@Test
public void testParseNlmErrorOk() {
final ByteBuffer byteBuffer = ByteBuffer.wrap(NLM_ERROR_OK);
byteBuffer.order(ByteOrder.LITTLE_ENDIAN); // For testing.
final NetlinkMessage msg = NetlinkMessage.parse(byteBuffer, NETLINK_ROUTE);
assertNotNull(msg);
assertTrue(msg instanceof NetlinkErrorMessage);
final NetlinkErrorMessage errorMsg = (NetlinkErrorMessage) msg;
final StructNlMsgHdr hdr = errorMsg.getHeader();
assertNotNull(hdr);
assertEquals(36, hdr.nlmsg_len);
assertEquals(NetlinkConstants.NLMSG_ERROR, hdr.nlmsg_type);
assertEquals(0, hdr.nlmsg_flags);
assertEquals(13606, hdr.nlmsg_seq);
assertEquals(4196, hdr.nlmsg_pid);
final StructNlMsgErr err = errorMsg.getNlMsgError();
assertNotNull(err);
assertEquals(0, err.error);
assertNotNull(err.msg);
assertEquals(48, err.msg.nlmsg_len);
assertEquals(NetlinkConstants.RTM_NEWNEIGH, err.msg.nlmsg_type);
assertEquals((NLM_F_REQUEST | NLM_F_ACK | NLM_F_REPLACE), err.msg.nlmsg_flags);
assertEquals(13606, err.msg.nlmsg_seq);
assertEquals(0, err.msg.nlmsg_pid);
}
}
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