Add NattKeepalivePacketDataTest

import static android.net.InvalidPacketException.ERROR_INVALID_PORT;

import android.annotation.NonNull;

import android.annotation.Nullable;

import android.annotation.SystemApi;

import android.net.util.IpUtils;

import android.os.Parcel;

import java.net.InetAddress;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.util.Objects;

/** @hide */

@SystemApi

                    return new NattKeepalivePacketData[size];

                }

            };

    @Override

    public boolean equals(@Nullable final Object o) {

        if (!(o instanceof NattKeepalivePacketData)) return false;

        final NattKeepalivePacketData other = (NattKeepalivePacketData) o;

        return this.srcAddress.equals(other.srcAddress)

            && this.dstAddress.equals(other.dstAddress)

            && this.srcPort == other.srcPort

            && this.dstPort == other.dstPort;

    }

    @Override

    public int hashCode() {

        return Objects.hash(srcAddress, dstAddress, srcPort, dstPort);

    }

}

/*

 * Copyright (C) 2020 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 android.net

import android.net.InvalidPacketException.ERROR_INVALID_IP_ADDRESS

import android.net.InvalidPacketException.ERROR_INVALID_PORT

import android.net.NattSocketKeepalive.NATT_PORT

import android.os.Build

import androidx.test.filters.SmallTest

import androidx.test.runner.AndroidJUnit4

import com.android.testutils.assertEqualBothWays

import com.android.testutils.assertFieldCountEquals

import com.android.testutils.assertParcelSane

import com.android.testutils.DevSdkIgnoreRule

import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo

import com.android.testutils.parcelingRoundTrip

import java.net.InetAddress

import org.junit.Assert.assertEquals

import org.junit.Assert.assertNotEquals

import org.junit.Assert.fail

import org.junit.Rule

import org.junit.Test

import org.junit.runner.RunWith

@RunWith(AndroidJUnit4::class)

@SmallTest

class NattKeepalivePacketDataTest {

    @Rule @JvmField

    val ignoreRule: DevSdkIgnoreRule = DevSdkIgnoreRule()

    /* Refer to the definition in {@code NattKeepalivePacketData} */

    private val IPV4_HEADER_LENGTH = 20

    private val UDP_HEADER_LENGTH = 8

    private val TEST_PORT = 4243

    private val TEST_PORT2 = 4244

    private val TEST_SRC_ADDRV4 = "198.168.0.2".address()

    private val TEST_DST_ADDRV4 = "198.168.0.1".address()

    private val TEST_ADDRV6 = "2001:db8::1".address()

    private fun String.address() = InetAddresses.parseNumericAddress(this)

    private fun nattKeepalivePacket(

        srcAddress: InetAddress? = TEST_SRC_ADDRV4,

        srcPort: Int = TEST_PORT,

        dstAddress: InetAddress? = TEST_DST_ADDRV4,

        dstPort: Int = NATT_PORT

    ) = NattKeepalivePacketData.nattKeepalivePacket(srcAddress, srcPort, dstAddress, dstPort)

    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)

    fun testConstructor() {

        try {

            nattKeepalivePacket(dstPort = TEST_PORT)

            fail("Dst port is not NATT port should cause exception")

        } catch (e: InvalidPacketException) {

            assertEquals(e.error, ERROR_INVALID_PORT)

        }

        try {

            nattKeepalivePacket(srcAddress = TEST_ADDRV6)

            fail("A v6 srcAddress should cause exception")

        } catch (e: InvalidPacketException) {

            assertEquals(e.error, ERROR_INVALID_IP_ADDRESS)

        }

        try {

            nattKeepalivePacket(dstAddress = TEST_ADDRV6)

            fail("A v6 dstAddress should cause exception")

        } catch (e: InvalidPacketException) {

            assertEquals(e.error, ERROR_INVALID_IP_ADDRESS)

        }

        try {

            parcelingRoundTrip(

                    NattKeepalivePacketData(TEST_SRC_ADDRV4, TEST_PORT, TEST_DST_ADDRV4, TEST_PORT,

                    byteArrayOf(12, 31, 22, 44)))

            fail("Invalid data should cause exception")

        } catch (e: IllegalArgumentException) { }

    }

    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)

    fun testParcel() {

        assertParcelSane(nattKeepalivePacket(), 0)

    }

    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)

    fun testEquals() {

        assertEqualBothWays(nattKeepalivePacket(), nattKeepalivePacket())

        assertNotEquals(nattKeepalivePacket(dstAddress = TEST_SRC_ADDRV4), nattKeepalivePacket())

        assertNotEquals(nattKeepalivePacket(srcAddress = TEST_DST_ADDRV4), nattKeepalivePacket())

        // Test src port only because dst port have to be NATT_PORT

        assertNotEquals(nattKeepalivePacket(srcPort = TEST_PORT2), nattKeepalivePacket())

        // Make sure the parceling test is updated if fields are added in the base class.

        assertFieldCountEquals(5, KeepalivePacketData::class.java)

    }

    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)

    fun testHashCode() {

        assertEquals(nattKeepalivePacket().hashCode(), nattKeepalivePacket().hashCode())

    }

}

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