| /* |
| * Copyright (C) 2023 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.apf |
| |
| import android.content.Context |
| import android.net.LinkAddress |
| import android.net.LinkProperties |
| import android.net.apf.ApfCounterTracker.Counter |
| import android.net.apf.ApfCounterTracker.Counter.APF_PROGRAM_ID |
| import android.net.apf.ApfCounterTracker.Counter.APF_VERSION |
| import android.net.apf.ApfCounterTracker.Counter.DROPPED_ARP_REQUEST_REPLIED |
| import android.net.apf.ApfCounterTracker.Counter.DROPPED_ETHERTYPE_DENYLISTED |
| import android.net.apf.ApfCounterTracker.Counter.DROPPED_ETH_BROADCAST |
| import android.net.apf.ApfCounterTracker.Counter.PASSED_ARP |
| import android.net.apf.ApfCounterTracker.Counter.TOTAL_PACKETS |
| import android.net.apf.ApfFilter.Dependencies |
| import android.net.apf.ApfTestUtils.DROP |
| import android.net.apf.ApfTestUtils.MIN_PKT_SIZE |
| import android.net.apf.ApfTestUtils.PASS |
| import android.net.apf.ApfTestUtils.TestApfFilter |
| import android.net.apf.ApfTestUtils.assertDrop |
| import android.net.apf.ApfTestUtils.assertPass |
| import android.net.apf.ApfTestUtils.assertVerdict |
| import android.net.apf.BaseApfGenerator.APF_VERSION_2 |
| import android.net.apf.BaseApfGenerator.APF_VERSION_4 |
| import android.net.apf.BaseApfGenerator.APF_VERSION_6 |
| import android.net.apf.BaseApfGenerator.DROP_LABEL |
| import android.net.apf.BaseApfGenerator.IllegalInstructionException |
| import android.net.apf.BaseApfGenerator.MemorySlot |
| import android.net.apf.BaseApfGenerator.PASS_LABEL |
| import android.net.apf.BaseApfGenerator.Register.R0 |
| import android.net.apf.BaseApfGenerator.Register.R1 |
| import android.os.Build |
| import android.system.OsConstants.ARPHRD_ETHER |
| import androidx.test.filters.SmallTest |
| import com.android.net.module.util.HexDump |
| import com.android.net.module.util.NetworkStackConstants.ARP_ETHER_IPV4_LEN |
| import com.android.net.module.util.NetworkStackConstants.ARP_REPLY |
| import com.android.net.module.util.NetworkStackConstants.ARP_REQUEST |
| import com.android.net.module.util.Struct |
| import com.android.net.module.util.arp.ArpPacket |
| import com.android.net.module.util.structs.EthernetHeader |
| import com.android.net.module.util.structs.Ipv4Header |
| import com.android.net.module.util.structs.UdpHeader |
| import com.android.networkstack.metrics.NetworkQuirkMetrics |
| import com.android.testutils.DevSdkIgnoreRule |
| import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo |
| import com.android.testutils.DevSdkIgnoreRunner |
| import java.net.InetAddress |
| import java.nio.ByteBuffer |
| import kotlin.test.assertContentEquals |
| import kotlin.test.assertEquals |
| import kotlin.test.assertFailsWith |
| import org.junit.After |
| import org.junit.Before |
| import org.junit.Rule |
| import org.junit.Test |
| import org.junit.runner.RunWith |
| import org.mockito.Mock |
| import org.mockito.Mockito |
| import org.mockito.MockitoAnnotations |
| |
| /** |
| * Tests for APFv6 specific instructions. |
| */ |
| @RunWith(DevSdkIgnoreRunner::class) |
| @SmallTest |
| class ApfV5Test { |
| |
| @get:Rule |
| val ignoreRule = DevSdkIgnoreRule() |
| |
| @Mock |
| private lateinit var context: Context |
| |
| @Mock |
| private lateinit var metrics: NetworkQuirkMetrics |
| |
| @Mock |
| private lateinit var dependencies: Dependencies |
| |
| private val defaultMaximumApfProgramSize = 2048 |
| |
| private val testPacket = byteArrayOf(1, 2, 3, 4, 5, 6, 7, 8, |
| 9, 10, 11, 12, 13, 14, 15, 16) |
| private val hostIpv4Address = byteArrayOf(10, 0, 0, 1) |
| private val senderIpv4Address = byteArrayOf(10, 0, 0, 2) |
| private val arpBroadcastMacAddress = intArrayOf(0xff, 0xff, 0xff, 0xff, 0xff, 0xff) |
| .map { it.toByte() }.toByteArray() |
| private val senderMacAddress = intArrayOf(0x11, 0x22, 0x33, 0x44, 0x55, 0x66) |
| .map { it.toByte() }.toByteArray() |
| |
| @Before |
| fun setUp() { |
| MockitoAnnotations.initMocks(this) |
| } |
| |
| @After |
| fun tearDown() { |
| Mockito.framework().clearInlineMocks() |
| ApfJniUtils.resetTransmittedPacketMemory() |
| } |
| |
| @Test |
| fun testDataInstructionMustComeFirst() { |
| var gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addAllocateR0() |
| assertFailsWith<IllegalInstructionException> { gen.addData(ByteArray(3) { 0x01 }) } |
| } |
| |
| @Test |
| fun testApfInstructionEncodingSizeCheck() { |
| var gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| assertFailsWith<IllegalArgumentException> { |
| ApfV6Generator(ByteArray(65536) { 0x01 }, defaultMaximumApfProgramSize) |
| } |
| assertFailsWith<IllegalArgumentException> { gen.addAllocate(65536) } |
| assertFailsWith<IllegalArgumentException> { gen.addAllocate(-1) } |
| assertFailsWith<IllegalArgumentException> { gen.addDataCopy(-1, 1) } |
| assertFailsWith<IllegalArgumentException> { gen.addPacketCopy(-1, 1) } |
| assertFailsWith<IllegalArgumentException> { gen.addDataCopy(1, 256) } |
| assertFailsWith<IllegalArgumentException> { gen.addPacketCopy(1, 256) } |
| assertFailsWith<IllegalArgumentException> { gen.addDataCopy(1, -1) } |
| assertFailsWith<IllegalArgumentException> { gen.addPacketCopy(1, -1) } |
| assertFailsWith<IllegalArgumentException> { gen.addPacketCopyFromR0(256) } |
| assertFailsWith<IllegalArgumentException> { gen.addDataCopyFromR0(256) } |
| assertFailsWith<IllegalArgumentException> { gen.addPacketCopyFromR0(-1) } |
| assertFailsWith<IllegalArgumentException> { gen.addDataCopyFromR0(-1) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 0, 0), |
| 256, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, 'a'.code.toByte(), 0, 0), |
| 0x0c, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, '.'.code.toByte(), 0, 0), |
| 0x0c, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(0, 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte()), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(64) + ByteArray(64) { 'A'.code.toByte() } + byteArrayOf(0, 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte(), 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte()), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 0, 0), |
| 256, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, 'a'.code.toByte(), 0, 0), |
| 0x0c, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, '.'.code.toByte(), 0, 0), |
| 0x0c, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(0, 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte()), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(64) + ByteArray(64) { 'A'.code.toByte() } + byteArrayOf(0, 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte(), 0), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte()), |
| 0xc0, |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(1, 'a'.code.toByte(), 0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(1, '.'.code.toByte(), 0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte()), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(64) + ByteArray(64) { 'A'.code.toByte() } + byteArrayOf(0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte(), 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0DoesNotContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte()), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(1, 'a'.code.toByte(), 0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(1, '.'.code.toByte(), 0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte()), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(64) + ByteArray(64) { 'A'.code.toByte() } + byteArrayOf(0, 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte(), 0), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { gen.addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte()), |
| ApfV4Generator.DROP_LABEL |
| ) } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfBytesAtR0Equal(ByteArray(2048) { 1 }, DROP_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfBytesAtR0NotEqual(ByteArray(2048) { 1 }, DROP_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { gen.addCountAndDrop(PASSED_ARP) } |
| assertFailsWith<IllegalArgumentException> { gen.addCountAndPass(DROPPED_ETH_BROADCAST) } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndDropIfR0Equals(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndPassIfR0Equals(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndDropIfR0NotEquals(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndPassIfR0NotEquals(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndDropIfR0LessThan(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndPassIfR0LessThan(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addCountAndDropIfBytesAtR0NotEqual(byteArrayOf(1), PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addWrite32(byteArrayOf()) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfOneOf(R0, setOf(), PASS_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfOneOf(R0, setOf(-1, 1), PASS_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfOneOf(R0, setOf(4294967296L, 1), PASS_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfOneOf(R0, List(34) { (it + 1).toLong() }.toSet(), PASS_LABEL) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfBytesAtR0EqualsAnyOf(listOf(ByteArray(2048) { 1 }), PASS_LABEL ) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| gen.addJumpIfBytesAtR0EqualsAnyOf( |
| listOf(byteArrayOf(1), byteArrayOf(1, 2)), |
| PASS_LABEL |
| ) |
| } |
| |
| val v4gen = ApfV4Generator(APF_VERSION_4) |
| assertFailsWith<IllegalArgumentException> { v4gen.addCountAndDrop(PASSED_ARP) } |
| assertFailsWith<IllegalArgumentException> { v4gen.addCountAndPass(DROPPED_ETH_BROADCAST) } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndDropIfR0Equals(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndPassIfR0Equals(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndDropIfR0NotEquals(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndPassIfR0NotEquals(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndDropIfR0LessThan(3, PASSED_ARP) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndPassIfR0LessThan(3, DROPPED_ETH_BROADCAST) |
| } |
| assertFailsWith<IllegalArgumentException> { |
| v4gen.addCountAndDropIfBytesAtR0NotEqual(byteArrayOf(1), PASSED_ARP) |
| } |
| } |
| |
| @Test |
| fun testValidateDnsNames() { |
| // '%' is a valid label character in mDNS subtype |
| // byte == 0xff means it is a '*' wildcard, which is a valid encoding. |
| val program = ApfV6Generator(defaultMaximumApfProgramSize).addJumpIfPktAtR0ContainDnsQ( |
| byteArrayOf(1, '%'.code.toByte(), 0, 0), |
| 1, |
| DROP_LABEL |
| ).addJumpIfPktAtR0ContainDnsA( |
| byteArrayOf(0xff.toByte(), 1, 'B'.code.toByte(), 0, 0), |
| DROP_LABEL |
| ).generate() |
| } |
| |
| @Test |
| fun testApfInstructionsEncoding() { |
| val v4gen = ApfV4Generator(APF_VERSION_2) |
| v4gen.addPass() |
| var program = v4gen.generate() |
| // encoding PASS opcode: opcode=0, imm_len=0, R=0 |
| assertContentEquals( |
| byteArrayOf(encodeInstruction(opcode = 0, immLength = 0, register = 0)), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: pass"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| var gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addDrop() |
| program = gen.generate().skipDataAndDebug() |
| // encoding DROP opcode: opcode=0, imm_len=0, R=1 |
| assertContentEquals( |
| byteArrayOf(encodeInstruction(opcode = 0, immLength = 0, register = 1)), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: drop"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addCountAndPass(129) |
| program = gen.generate().skipDataAndDebug() |
| // encoding COUNT(PASS) opcode: opcode=0, imm_len=size_of(imm), R=0, imm=counterNumber |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 0, immLength = 1, register = 0), |
| 0x81.toByte() |
| ), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: pass counter=129"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addCountAndDrop(1000) |
| program = gen.generate().skipDataAndDebug() |
| // encoding COUNT(DROP) opcode: opcode=0, imm_len=size_of(imm), R=1, imm=counterNumber |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 0, immLength = 2, register = 1), |
| 0x03, |
| 0xe8.toByte() |
| ), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: drop counter=1000"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addCountAndPass(PASSED_ARP) |
| program = gen.generate().skipDataAndDebug() |
| // encoding COUNT(PASS) opcode: opcode=0, imm_len=size_of(imm), R=0, imm=counterNumber |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 0, immLength = 1, register = 0), |
| PASSED_ARP.value().toByte() |
| ), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: pass counter=10"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addCountAndDrop(DROPPED_ETHERTYPE_DENYLISTED) |
| program = gen.generate().skipDataAndDebug() |
| // encoding COUNT(DROP) opcode: opcode=0, imm_len=size_of(imm), R=1, imm=counterNumber |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 0, immLength = 1, register = 1), |
| DROPPED_ETHERTYPE_DENYLISTED.value().toByte() |
| ), |
| program |
| ) |
| assertContentEquals( |
| listOf("0: drop counter=37"), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addAllocateR0() |
| gen.addAllocate(1500) |
| program = gen.generate().skipDataAndDebug() |
| // encoding ALLOC opcode: opcode=21(EXT opcode number), imm=36(TRANS opcode number). |
| // R=0 means length stored in R0. R=1 means the length stored in imm1. |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 21, immLength = 1, register = 0), |
| 36, |
| encodeInstruction(opcode = 21, immLength = 1, register = 1), |
| 36, |
| 0x05, |
| 0xDC.toByte() |
| ), |
| program |
| ) |
| assertContentEquals(listOf( |
| "0: allocate r0", |
| "2: allocate 1500" |
| ), ApfJniUtils.disassembleApf(program).map { it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addTransmitWithoutChecksum() |
| gen.addTransmitL4(30, 40, 50, 256, true) |
| program = gen.generate().skipDataAndDebug() |
| // encoding TRANSMIT opcode: opcode=21(EXT opcode number), |
| // imm=37(TRANSMIT opcode number), |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(opcode = 21, immLength = 1, register = 0), |
| 37, 255.toByte(), 255.toByte(), |
| encodeInstruction(opcode = 21, immLength = 1, register = 1), 37, 30, 40, 50, 1, 0 |
| ), program) |
| assertContentEquals(listOf( |
| "0: transmit ip_ofs=255", |
| "4: transmitudp ip_ofs=30, csum_ofs=40, csum_start=50, partial_csum=0x0100", |
| ), ApfJniUtils.disassembleApf(program).map { it.trim() }) |
| |
| val largeByteArray = ByteArray(256) { 0x01 } |
| gen = ApfV6Generator(largeByteArray, defaultMaximumApfProgramSize) |
| program = gen.generate() |
| assertContentEquals( |
| byteArrayOf( |
| encodeInstruction(opcode = 14, immLength = 2, register = 1), 1, 0 |
| ) + largeByteArray + byteArrayOf( |
| encodeInstruction(opcode = 21, immLength = 1, register = 0), 48, 6, 49 |
| ), |
| program |
| ) |
| assertContentEquals( |
| listOf( |
| "0: data 256, " + "01".repeat(256), |
| "259: debugbuf size=1585" |
| ), |
| ApfJniUtils.disassembleApf(program).map { it.trim() } |
| ) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addWriteU8(0x01) |
| gen.addWriteU16(0x0102) |
| gen.addWriteU32(0x01020304) |
| gen.addWriteU8(0x00) |
| gen.addWriteU8(0x80) |
| gen.addWriteU16(0x0000) |
| gen.addWriteU16(0x8000) |
| gen.addWriteU32(0x00000000) |
| gen.addWriteU32(0x80000000) |
| gen.addWrite32(-2) |
| gen.addWrite32(byteArrayOf(0xff.toByte(), 0xfe.toByte(), 0xfd.toByte(), 0xfc.toByte())) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(24, 1, 0), 0x01, |
| encodeInstruction(24, 2, 0), 0x01, 0x02, |
| encodeInstruction(24, 4, 0), 0x01, 0x02, 0x03, 0x04, |
| encodeInstruction(24, 1, 0), 0x00, |
| encodeInstruction(24, 1, 0), 0x80.toByte(), |
| encodeInstruction(24, 2, 0), 0x00, 0x00, |
| encodeInstruction(24, 2, 0), 0x80.toByte(), 0x00, |
| encodeInstruction(24, 4, 0), 0x00, 0x00, 0x00, 0x00, |
| encodeInstruction(24, 4, 0), 0x80.toByte(), 0x00, 0x00, 0x00, |
| encodeInstruction(24, 4, 0), 0xff.toByte(), 0xff.toByte(), |
| 0xff.toByte(), 0xfe.toByte(), |
| encodeInstruction(24, 4, 0), 0xff.toByte(), 0xfe.toByte(), |
| 0xfd.toByte(), 0xfc.toByte()), program) |
| assertContentEquals(listOf( |
| "0: write 0x01", |
| "2: write 0x0102", |
| "5: write 0x01020304", |
| "10: write 0x00", |
| "12: write 0x80", |
| "14: write 0x0000", |
| "17: write 0x8000", |
| "20: write 0x00000000", |
| "25: write 0x80000000", |
| "30: write 0xfffffffe", |
| "35: write 0xfffefdfc" |
| ), ApfJniUtils.disassembleApf(program).map { it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addWriteU8(R0) |
| gen.addWriteU16(R0) |
| gen.addWriteU32(R0) |
| gen.addWriteU8(R1) |
| gen.addWriteU16(R1) |
| gen.addWriteU32(R1) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 0), 38, |
| encodeInstruction(21, 1, 0), 39, |
| encodeInstruction(21, 1, 0), 40, |
| encodeInstruction(21, 1, 1), 38, |
| encodeInstruction(21, 1, 1), 39, |
| encodeInstruction(21, 1, 1), 40 |
| ), program) |
| assertContentEquals(listOf( |
| "0: ewrite1 r0", |
| "2: ewrite2 r0", |
| "4: ewrite4 r0", |
| "6: ewrite1 r1", |
| "8: ewrite2 r1", |
| "10: ewrite4 r1" |
| ), ApfJniUtils.disassembleApf(program).map { it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addDataCopy(0, 10) |
| gen.addDataCopy(1, 5) |
| gen.addPacketCopy(1000, 255) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(25, 0, 1), 10, |
| encodeInstruction(25, 1, 1), 1, 5, |
| encodeInstruction(25, 2, 0), |
| 0x03.toByte(), 0xe8.toByte(), 0xff.toByte(), |
| ), program) |
| assertContentEquals(listOf( |
| "0: datacopy src=0, len=10", |
| "2: datacopy src=1, len=5", |
| "5: pktcopy src=1000, len=255" |
| ), ApfJniUtils.disassembleApf(program).map { it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addDataCopyFromR0(5) |
| gen.addPacketCopyFromR0(5) |
| gen.addDataCopyFromR0LenR1() |
| gen.addPacketCopyFromR0LenR1() |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 1), 41, 5, |
| encodeInstruction(21, 1, 0), 41, 5, |
| encodeInstruction(21, 1, 1), 42, |
| encodeInstruction(21, 1, 0), 42, |
| ), program) |
| assertContentEquals(listOf( |
| "0: edatacopy src=r0, len=5", |
| "3: epktcopy src=r0, len=5", |
| "6: edatacopy src=r0, len=r1", |
| "8: epktcopy src=r0, len=r1" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfBytesAtR0Equal(byteArrayOf('a'.code.toByte()), ApfV4Generator.DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(opcode = 20, immLength = 1, register = 1), |
| 1, |
| 1, |
| 'a'.code.toByte() |
| ), program) |
| assertContentEquals(listOf( |
| "0: jbseq r0, 0x1, DROP, 61" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| val qnames = byteArrayOf(1, 'A'.code.toByte(), 1, 'B'.code.toByte(), 0, 0) |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfPktAtR0DoesNotContainDnsQ(qnames, 0x0c, ApfV4Generator.DROP_LABEL) |
| gen.addJumpIfPktAtR0ContainDnsQ(qnames, 0x0c, ApfV4Generator.DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 0), 43, 11, 0x0c.toByte(), |
| ) + qnames + byteArrayOf( |
| encodeInstruction(21, 1, 1), 43, 1, 0x0c.toByte(), |
| ) + qnames, program) |
| assertContentEquals(listOf( |
| "0: jdnsqne r0, DROP, 12, (1)A(1)B(0)(0)", |
| "10: jdnsqeq r0, DROP, 12, (1)A(1)B(0)(0)" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfPktAtR0DoesNotContainDnsQSafe(qnames, 0x0c, ApfV4Generator.DROP_LABEL) |
| gen.addJumpIfPktAtR0ContainDnsQSafe(qnames, 0x0c, ApfV4Generator.DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 0), 45, 11, 0x0c.toByte(), |
| ) + qnames + byteArrayOf( |
| encodeInstruction(21, 1, 1), 45, 1, 0x0c.toByte(), |
| ) + qnames, program) |
| assertContentEquals(listOf( |
| "0: jdnsqnesafe r0, DROP, 12, (1)A(1)B(0)(0)", |
| "10: jdnsqeqsafe r0, DROP, 12, (1)A(1)B(0)(0)" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfPktAtR0DoesNotContainDnsA(qnames, ApfV4Generator.DROP_LABEL) |
| gen.addJumpIfPktAtR0ContainDnsA(qnames, ApfV4Generator.DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 0), 44, 10, |
| ) + qnames + byteArrayOf( |
| encodeInstruction(21, 1, 1), 44, 1, |
| ) + qnames, program) |
| assertContentEquals(listOf( |
| "0: jdnsane r0, DROP, (1)A(1)B(0)(0)", |
| "9: jdnsaeq r0, DROP, (1)A(1)B(0)(0)" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfPktAtR0DoesNotContainDnsASafe(qnames, ApfV4Generator.DROP_LABEL) |
| gen.addJumpIfPktAtR0ContainDnsASafe(qnames, ApfV4Generator.DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 0), 46, 10, |
| ) + qnames + byteArrayOf( |
| encodeInstruction(21, 1, 1), 46, 1, |
| ) + qnames, program) |
| assertContentEquals(listOf( |
| "0: jdnsanesafe r0, DROP, (1)A(1)B(0)(0)", |
| "9: jdnsaeqsafe r0, DROP, (1)A(1)B(0)(0)" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfOneOf(R1, List(32) { (it + 1).toLong() }.toSet(), DROP_LABEL) |
| gen.addJumpIfOneOf(R0, setOf(0, 257, 65536), DROP_LABEL) |
| gen.addJumpIfNoneOf(R0, setOf(1, 2, 3), DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(21, 1, 1), 47, 24, -16, 1, 2, 3, 4, 5, 6, |
| 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, |
| 29, 30, 31, 32, |
| encodeInstruction(21, 1, 0), 47, 8, 14, 0, 0, 0, 0, 0, 0, |
| 1, 1, 0, 1, 0, 0, |
| encodeInstruction(21, 1, 0), 47, 1, 9, 1, 2, 3 |
| ), program) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfOneOf(R0, setOf(0, 128, 256, 65536), DROP_LABEL) |
| gen.addJumpIfNoneOf(R1, setOf(0, 128, 256, 65536), DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(listOf( |
| "0: joneof r0, DROP, { 0, 128, 256, 65536 }", |
| "20: jnoneof r1, DROP, { 0, 128, 256, 65536 }" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| |
| gen = ApfV6Generator(defaultMaximumApfProgramSize) |
| gen.addJumpIfBytesAtR0EqualsAnyOf(listOf(byteArrayOf(1, 2), byteArrayOf(3, 4)), DROP_LABEL) |
| gen.addJumpIfBytesAtR0EqualNoneOf(listOf(byteArrayOf(1, 2), byteArrayOf(3, 4)), DROP_LABEL) |
| gen.addJumpIfBytesAtR0EqualNoneOf(listOf(byteArrayOf(1, 1), byteArrayOf(1, 1)), DROP_LABEL) |
| program = gen.generate().skipDataAndDebug() |
| assertContentEquals(byteArrayOf( |
| encodeInstruction(opcode = 20, immLength = 2, register = 1), |
| 0, 15, 8, 2, 1, 2, 3, 4, |
| encodeInstruction(opcode = 20, immLength = 2, register = 0), |
| 0, 6, 8, 2, 1, 2, 3, 4, |
| encodeInstruction(opcode = 20, immLength = 1, register = 0), |
| 1, 2, 1, 1 |
| ), program) |
| assertContentEquals(listOf( |
| "0: jbseq r0, 0x2, DROP, { 0102, 0304 }", |
| "9: jbsne r0, 0x2, DROP, { 0102, 0304 }", |
| "18: jbsne r0, 0x2, DROP, 0101" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| } |
| |
| @Test |
| fun testWriteToTxBuffer() { |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addAllocate(14) |
| .addWriteU8(0x01) |
| .addWriteU16(0x0203) |
| .addWriteU32(0x04050607) |
| .addWrite32(-2) |
| .addWrite32(byteArrayOf(0xff.toByte(), 0xfe.toByte(), 0xfd.toByte(), 0xfc.toByte())) |
| .addLoadImmediate(R0, 1) |
| .addWriteU8(R0) |
| .addLoadImmediate(R0, 0x0203) |
| .addWriteU16(R0) |
| .addLoadImmediate(R1, 0x04050607) |
| .addWriteU32(R1) |
| .addTransmitWithoutChecksum() |
| .generate() |
| assertPass(APF_VERSION_6, program, ByteArray(MIN_PKT_SIZE)) |
| assertContentEquals( |
| byteArrayOf( |
| 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0xff.toByte(), |
| 0xff.toByte(), 0xff.toByte(), 0xfe.toByte(), 0xff.toByte(), 0xfe.toByte(), |
| 0xfd.toByte(), 0xfc.toByte(), 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07), |
| ApfJniUtils.getTransmittedPacket() |
| ) |
| } |
| |
| @Test |
| fun testCopyToTxBuffer() { |
| var program = ApfV6Generator(byteArrayOf(33, 34, 35), defaultMaximumApfProgramSize) |
| .addAllocate(14) |
| .addDataCopy(3, 2) // arg1=src, arg2=len |
| .addDataCopy(5, 1) // arg1=src, arg2=len |
| .addPacketCopy(0, 1) // arg1=src, arg2=len |
| .addPacketCopy(1, 3) // arg1=src, arg2=len |
| .addLoadImmediate(R0, 3) // data copy offset |
| .addDataCopyFromR0(2) // len |
| .addLoadImmediate(R0, 5) // data copy offset |
| .addLoadImmediate(R1, 1) // len |
| .addDataCopyFromR0LenR1() |
| .addLoadImmediate(R0, 0) // packet copy offset |
| .addPacketCopyFromR0(1) // len |
| .addLoadImmediate(R0, 1) // packet copy offset |
| .addLoadImmediate(R1, 3) // len |
| .addPacketCopyFromR0LenR1() |
| .addTransmitWithoutChecksum() |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| assertContentEquals( |
| byteArrayOf(33, 34, 35, 1, 2, 3, 4, 33, 34, 35, 1, 2, 3, 4), |
| ApfJniUtils.getTransmittedPacket() |
| ) |
| } |
| |
| @Test |
| fun testCopyContentToTxBuffer() { |
| val program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addAllocate(18) |
| .addDataCopy(HexDump.hexStringToByteArray("112233445566")) |
| .addDataCopy(HexDump.hexStringToByteArray("223344")) |
| .addDataCopy(HexDump.hexStringToByteArray("778899")) |
| .addDataCopy(HexDump.hexStringToByteArray("112233445566")) |
| .addTransmitWithoutChecksum() |
| .generate() |
| assertContentEquals(listOf( |
| "0: data 9, 112233445566778899", |
| "12: debugbuf size=1812", |
| "16: allocate 18", |
| "20: datacopy src=3, len=6", |
| "23: datacopy src=4, len=3", |
| "26: datacopy src=9, len=3", |
| "29: datacopy src=3, len=6", |
| "32: transmit ip_ofs=255" |
| ), ApfJniUtils.disassembleApf(program).map{ it.trim() }) |
| assertPass(APF_VERSION_6, program, testPacket) |
| val transmitPkt = HexDump.toHexString(ApfJniUtils.getTransmittedPacket()) |
| assertEquals("112233445566223344778899112233445566", transmitPkt) |
| } |
| |
| @Test |
| fun testPassDrop() { |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addDrop() |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, testPacket) |
| |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addCountAndDrop(Counter.DROPPED_ETH_BROADCAST) |
| .generate() |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.DROPPED_ETH_BROADCAST to 1 |
| ), counterMap) |
| |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addCountAndPass(Counter.PASSED_ARP) |
| .generate() |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.PASSED_ARP to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testLoadStoreCounter() { |
| doTestLoadStoreCounter ( |
| { mutableMapOf() }, |
| { ApfV4Generator(APF_VERSION_4) } |
| ) |
| doTestLoadStoreCounter ( |
| { mutableMapOf(TOTAL_PACKETS to 1) }, |
| { ApfV6Generator(defaultMaximumApfProgramSize) } |
| ) |
| } |
| |
| private fun doTestLoadStoreCounter( |
| getInitialMap: () -> MutableMap<Counter, Long>, |
| getGenerator: () -> ApfV4GeneratorBase<*> |
| ) { |
| val program = getGenerator() |
| .addIncrementCounter(PASSED_ARP, 2) |
| .addPass() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| var expectedMap = getInitialMap() |
| expectedMap[PASSED_ARP] = 2 |
| assertEquals(expectedMap, counterMap) |
| } |
| |
| @Test |
| fun testCountAndPassDropCompareR0() { |
| doTestCountAndPassDropCompareR0( |
| { mutableMapOf() }, |
| { ApfV4Generator(APF_VERSION_4) } |
| ) |
| doTestCountAndPassDropCompareR0( |
| { mutableMapOf(Counter.TOTAL_PACKETS to 1) }, |
| { ApfV6Generator(defaultMaximumApfProgramSize) } |
| ) |
| } |
| |
| private fun doTestCountAndPassDropCompareR0( |
| getInitialMap: () -> MutableMap<Counter, Long>, |
| getGenerator: () -> ApfV4GeneratorBase<*> |
| ) { |
| var program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndDropIfR0Equals(123, Counter.DROPPED_ETH_BROADCAST) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| var expectedMap = getInitialMap() |
| expectedMap[Counter.DROPPED_ETH_BROADCAST] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndPassIfR0Equals(123, Counter.PASSED_ARP) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[Counter.PASSED_ARP] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndDropIfR0NotEquals(124, Counter.DROPPED_ETH_BROADCAST) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[Counter.DROPPED_ETH_BROADCAST] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndPassIfR0NotEquals(124, Counter.PASSED_ARP) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[Counter.PASSED_ARP] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndDropIfR0LessThan(124, Counter.DROPPED_ETH_BROADCAST) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[Counter.DROPPED_ETH_BROADCAST] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 123) |
| .addCountAndPassIfR0LessThan(124, Counter.PASSED_ARP) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[Counter.PASSED_ARP] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 1) |
| .addCountAndDropIfBytesAtR0NotEqual( |
| byteArrayOf(5, 5), DROPPED_ETH_BROADCAST) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[DROPPED_ETH_BROADCAST] = 1 |
| assertEquals(expectedMap, counterMap) |
| |
| program = getGenerator() |
| .addLoadImmediate(R0, 1) |
| .addCountAndPassIfBytesAtR0NotEqual( |
| byteArrayOf(5, 5), PASSED_ARP) |
| .addPass() |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| expectedMap = getInitialMap() |
| expectedMap[PASSED_ARP] = 1 |
| assertEquals(expectedMap, counterMap) |
| } |
| |
| @Test |
| fun testV4CountAndPassDrop() { |
| var program = ApfV4Generator(APF_VERSION_4) |
| .addCountAndDrop(Counter.DROPPED_ETH_BROADCAST) |
| .addCountTrampoline() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.DROPPED_ETH_BROADCAST to 1 |
| ), counterMap) |
| |
| program = ApfV4Generator(APF_VERSION_4) |
| .addCountAndPass(Counter.PASSED_ARP) |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.PASSED_ARP to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testV2CountAndPassDrop() { |
| var program = ApfV4Generator(APF_VERSION_2) |
| .addCountAndDrop(Counter.DROPPED_ETH_BROADCAST) |
| .addCountTrampoline() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, testPacket, dataRegion) |
| assertContentEquals(ByteArray(Counter.totalSize()) { 0 }, dataRegion) |
| |
| program = ApfV4Generator(APF_VERSION_2) |
| .addCountAndPass(PASSED_ARP) |
| .addCountTrampoline() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| assertContentEquals(ByteArray(Counter.totalSize()) { 0 }, dataRegion) |
| } |
| |
| @Test |
| fun testAllocateFailure() { |
| val program = ApfV6Generator(defaultMaximumApfProgramSize) |
| // allocate size: 65535 > sizeof(apf_test_buffer): 1514, trigger allocate failure. |
| .addAllocate(65535) |
| .addDrop() |
| .generate() |
| val dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| val counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.PASSED_ALLOCATE_FAILURE to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testTransmitFailure() { |
| val program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addAllocate(14) |
| // len: 13 is less than ETH_HLEN, trigger transmit failure. |
| .addLoadImmediate(R0, 13) |
| .addStoreToMemory(MemorySlot.TX_BUFFER_OUTPUT_POINTER, R0) |
| .addTransmitWithoutChecksum() |
| .addDrop() |
| .generate() |
| val dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| val counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.PASSED_TRANSMIT_FAILURE to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testTransmitL4() { |
| val etherIpv4UdpPacket = intArrayOf( |
| 0x01, 0x00, 0x5e, 0x00, 0x00, 0xfb, |
| 0x38, 0xca, 0x84, 0xb7, 0x7f, 0x16, |
| 0x08, 0x00, // end of ethernet header |
| 0x45, |
| 0x04, |
| 0x00, 0x3f, |
| 0x43, 0xcd, |
| 0x40, 0x00, |
| 0xff, |
| 0x11, |
| 0x00, 0x00, // ipv4 checksum set to 0 |
| 0xc0, 0xa8, 0x01, 0x03, |
| 0xe0, 0x00, 0x00, 0xfb, // end of ipv4 header |
| 0x14, 0xe9, |
| 0x14, 0xe9, |
| 0x00, 0x2b, |
| 0x00, 0x2b, // end of udp header. udp checksum set to udp (header + payload) size |
| 0x00, 0x00, 0x84, 0x00, 0x00, 0x00, |
| 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x62, 0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c, |
| 0x00, 0x00, 0x01, 0x80, 0x01, 0x00, 0x00, 0x00, 0x78, 0x00, 0x04, 0xc0, 0xa8, 0x01, |
| 0x09, |
| ).map { it.toByte() }.toByteArray() |
| val program = ApfV6Generator(etherIpv4UdpPacket, defaultMaximumApfProgramSize) |
| .addAllocate(etherIpv4UdpPacket.size) |
| .addDataCopy(3, etherIpv4UdpPacket.size) // arg1=src, arg2=len |
| .addTransmitL4( |
| ETH_HLEN, // ipOfs, |
| ETH_HLEN + IPV4_HLEN + 6, // csumOfs |
| ETH_HLEN + IPV4_HLEN - 8, // csumStart |
| IPPROTO_UDP, // partialCsum |
| true // isUdp |
| ) |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| val txBuf = ByteBuffer.wrap(ApfJniUtils.getTransmittedPacket()) |
| Struct.parse(EthernetHeader::class.java, txBuf) |
| val ipv4Hdr = Struct.parse(Ipv4Header::class.java, txBuf) |
| val udpHdr = Struct.parse(UdpHeader::class.java, txBuf) |
| assertEquals(0x9535.toShort(), ipv4Hdr.checksum) |
| assertEquals(0xa73d.toShort(), udpHdr.checksum) |
| } |
| |
| @Test |
| fun testDnsQuestionMatch() { |
| // needles = { A, B.LOCAL } |
| val needlesMatch = intArrayOf( |
| 0x01, 'A'.code, |
| 0x00, |
| 0x01, 'B'.code, |
| 0x05, 'L'.code, 'O'.code, 'C'.code, 'A'.code, 'L'.code, |
| 0x00, |
| 0x00 |
| ).map { it.toByte() }.toByteArray() |
| val udpPayload = intArrayOf( |
| 0x00, 0x00, 0x00, 0x00, // tid = 0x00, flags = 0x00, |
| 0x00, 0x02, // qdcount = 2 |
| 0x00, 0x00, // ancount = 0 |
| 0x00, 0x00, // nscount = 0 |
| 0x00, 0x00, // arcount = 0 |
| 0x01, 'a'.code, |
| 0x01, 'b'.code, |
| 0x05, 'l'.code, 'o'.code, 'c'.code, 'a'.code, 'l'.code, |
| 0x00, // qname1 = a.b.local |
| 0x00, 0x01, 0x00, 0x01, // type = A, class = 0x0001 |
| 0xc0, 0x0e, // qname2 = b.local (name compression) |
| 0x00, 0x01, 0x00, 0x01 // type = A, class = 0x0001 |
| ).map { it.toByte() }.toByteArray() |
| |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsQ(needlesMatch, 0x01, DROP_LABEL) // arg2=qtype |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsQSafe(needlesMatch, 0x01, DROP_LABEL) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0DoesNotContainDnsQ(needlesMatch, 0x01, DROP_LABEL) // arg2=qtype |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0DoesNotContainDnsQSafe(needlesMatch, 0x01, DROP_LABEL) // arg2=qtype |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, udpPayload) |
| |
| val badUdpPayload = intArrayOf( |
| 0x00, 0x00, 0x00, 0x00, // tid = 0x00, flags = 0x00, |
| 0x00, 0x02, // qdcount = 2 |
| 0x00, 0x00, // ancount = 0 |
| 0x00, 0x00, // nscount = 0 |
| 0x00, 0x00, // arcount = 0 |
| 0x01, 'a'.code, |
| 0x01, 'b'.code, |
| 0x05, 'l'.code, 'o'.code, 'c'.code, 'a'.code, 'l'.code, |
| 0x00, // qname1 = a.b.local |
| 0x00, 0x01, 0x00, 0x01, // type = A, class = 0x0001 |
| 0xc0, 0x1b, // corrupted pointer cause infinite loop |
| 0x00, 0x01, 0x00, 0x01 // type = A, class = 0x0001 |
| ).map { it.toByte() }.toByteArray() |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsQ(needlesMatch, 0x01, DROP_LABEL) // arg2=qtype |
| .addPass() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, badUdpPayload, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.CORRUPT_DNS_PACKET to 1 |
| ), counterMap) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsQSafe(needlesMatch, 0x01, DROP_LABEL) // arg2=qtype |
| .addPass() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, badUdpPayload, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.CORRUPT_DNS_PACKET to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testDnsAnswerMatch() { |
| // needles = { A, B.LOCAL } |
| val needlesMatch = intArrayOf( |
| 0x01, 'A'.code, |
| 0x00, |
| 0x01, 'B'.code, |
| 0x05, 'L'.code, 'O'.code, 'C'.code, 'A'.code, 'L'.code, |
| 0x00, |
| 0x00 |
| ).map { it.toByte() }.toByteArray() |
| |
| val udpPayload = intArrayOf( |
| 0x00, 0x00, 0x84, 0x00, // tid = 0x00, flags = 0x8400, |
| 0x00, 0x00, // qdcount = 0 |
| 0x00, 0x02, // ancount = 2 |
| 0x00, 0x00, // nscount = 0 |
| 0x00, 0x00, // arcount = 0 |
| 0x01, 'a'.code, |
| 0x01, 'b'.code, |
| 0x05, 'l'.code, 'o'.code, 'c'.code, 'a'.code, 'l'.code, |
| 0x00, // name1 = a.b.local |
| 0x00, 0x01, 0x80, 0x01, // type = A, class = 0x8001 |
| 0x00, 0x00, 0x00, 0x78, // ttl = 120 |
| 0x00, 0x04, 0xc0, 0xa8, 0x01, 0x09, // rdlengh = 4, rdata = 192.168.1.9 |
| 0xc0, 0x0e, // name2 = b.local (name compression) |
| 0x00, 0x01, 0x80, 0x01, // type = A, class = 0x8001 |
| 0x00, 0x00, 0x00, 0x78, // ttl = 120 |
| 0x00, 0x04, 0xc0, 0xa8, 0x01, 0x09 // rdlengh = 4, rdata = 192.168.1.9 |
| ).map { it.toByte() }.toByteArray() |
| |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsA(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsASafe(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0DoesNotContainDnsA(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, udpPayload) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0DoesNotContainDnsASafe(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, udpPayload) |
| |
| val badUdpPayload = intArrayOf( |
| 0x00, 0x00, 0x84, 0x00, // tid = 0x00, flags = 0x8400, |
| 0x00, 0x00, // qdcount = 0 |
| 0x00, 0x02, // ancount = 2 |
| 0x00, 0x00, // nscount = 0 |
| 0x00, 0x00, // arcount = 0 |
| 0x01, 'a'.code, |
| 0x01, 'b'.code, |
| 0x05, 'l'.code, 'o'.code, 'c'.code, 'a'.code, 'l'.code, |
| 0x00, // name1 = a.b.local |
| 0x00, 0x01, 0x80, 0x01, // type = A, class = 0x8001 |
| 0x00, 0x00, 0x00, 0x78, // ttl = 120 |
| 0x00, 0x04, 0xc0, 0xa8, 0x01, 0x09, // rdlengh = 4, rdata = 192.168.1.9 |
| 0xc0, 0x25, // corrupted pointer cause infinite loop |
| 0x00, 0x01, 0x80, 0x01, // type = A, class = 0x8001 |
| 0x00, 0x00, 0x00, 0x78, // ttl = 120 |
| 0x00, 0x04, 0xc0, 0xa8, 0x01, 0x09 // rdlengh = 4, rdata = 192.168.1.9 |
| ).map { it.toByte() }.toByteArray() |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsA(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| var dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, badUdpPayload, dataRegion) |
| var counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.CORRUPT_DNS_PACKET to 1 |
| ), counterMap) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfPktAtR0ContainDnsASafe(needlesMatch, DROP_LABEL) |
| .addPass() |
| .generate() |
| dataRegion = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, PASS, program, badUdpPayload, dataRegion) |
| counterMap = decodeCountersIntoMap(dataRegion) |
| assertEquals(mapOf<Counter, Long>( |
| Counter.TOTAL_PACKETS to 1, |
| Counter.CORRUPT_DNS_PACKET to 1 |
| ), counterMap) |
| } |
| |
| @Test |
| fun testGetCounterValue() { |
| val counterBytes = intArrayOf(0xff, 0, 0, 0, 0x78, 0x56, 0x34, 0x12) |
| .map { it.toByte() }.toByteArray() |
| assertEquals(0xff, ApfCounterTracker.getCounterValue(counterBytes, Counter.TOTAL_PACKETS)) |
| } |
| |
| @Test |
| fun testJumpMultipleByteSequencesMatch() { |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfBytesAtR0EqualsAnyOf( |
| listOf(byteArrayOf(1, 2, 3), byteArrayOf(6, 5, 4)), |
| DROP_LABEL |
| ) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 2) |
| .addJumpIfBytesAtR0EqualsAnyOf( |
| listOf(byteArrayOf(1, 2, 3), byteArrayOf(6, 5, 4)), |
| DROP_LABEL |
| ) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 1) |
| .addJumpIfBytesAtR0EqualNoneOf( |
| listOf(byteArrayOf(1, 2, 3), byteArrayOf(6, 5, 4)), |
| DROP_LABEL |
| ) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 0) |
| .addJumpIfBytesAtR0EqualNoneOf( |
| listOf(byteArrayOf(1, 2, 3), byteArrayOf(6, 5, 4)), |
| DROP_LABEL |
| ) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| } |
| |
| @Test |
| fun testJumpOneOf() { |
| var program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 255) |
| .addJumpIfOneOf(R0, setOf(1, 2, 3, 128, 255), DROP_LABEL) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 254) |
| .addJumpIfOneOf(R0, setOf(1, 2, 3, 128, 255), DROP_LABEL) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 254) |
| .addJumpIfNoneOf(R0, setOf(1, 2, 3, 128, 255), DROP_LABEL) |
| .addPass() |
| .generate() |
| assertDrop(APF_VERSION_6, program, testPacket) |
| |
| program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoadImmediate(R0, 255) |
| .addJumpIfNoneOf(R0, setOf(1, 2, 3, 128, 255), DROP_LABEL) |
| .addPass() |
| .generate() |
| assertPass(APF_VERSION_6, program, testPacket) |
| } |
| |
| @Test |
| fun testDebugBuffer() { |
| val program = ApfV6Generator(defaultMaximumApfProgramSize) |
| .addLoad8(R0, 255) |
| .generate() |
| val dataRegion = ByteArray(defaultMaximumApfProgramSize - program.size) { 0 } |
| |
| assertVerdict(APF_VERSION_6, PASS, program, testPacket, dataRegion) |
| // offset 3 in the data region should contain if the interpreter is APFv6 mode or not |
| assertEquals(1, dataRegion[3]) |
| } |
| |
| // The APFv6 code path is only turned on in V+ |
| @IgnoreUpTo(Build.VERSION_CODES.UPSIDE_DOWN_CAKE) |
| @Test |
| fun testArpTransmit() { |
| val ipClientCallback = ApfTestUtils.MockIpClientCallback() |
| val apfFilter = TestApfFilter( |
| context, |
| getDefaultConfig(), |
| ipClientCallback, |
| metrics, |
| dependencies |
| ) |
| val linkAddress = LinkAddress(InetAddress.getByAddress(hostIpv4Address), 24) |
| val lp = LinkProperties() |
| lp.addLinkAddress(linkAddress) |
| ipClientCallback.resetApfProgramWait() |
| apfFilter.setLinkProperties(lp) |
| val program = ipClientCallback.assertProgramUpdateAndGet() |
| val receivedArpPacketBuf = ArpPacket.buildArpPacket( |
| arpBroadcastMacAddress, |
| senderMacAddress, |
| hostIpv4Address, |
| HexDump.hexStringToByteArray("000000000000"), |
| senderIpv4Address, |
| ARP_REQUEST.toShort() |
| ) |
| val receivedArpPacket = ByteArray(ARP_ETHER_IPV4_LEN) |
| receivedArpPacketBuf.get(receivedArpPacket) |
| val data = ByteArray(Counter.totalSize()) { 0 } |
| assertVerdict(APF_VERSION_6, DROP, program, receivedArpPacket, data) |
| |
| val transmittedPacket = ApfJniUtils.getTransmittedPacket() |
| val expectedArpReplyBuf = ArpPacket.buildArpPacket( |
| senderMacAddress, |
| apfFilter.mHardwareAddress, |
| senderIpv4Address, |
| senderMacAddress, |
| hostIpv4Address, |
| ARP_REPLY.toShort() |
| ) |
| val expectedArpReplyPacket = ByteArray(ARP_ETHER_IPV4_LEN) |
| expectedArpReplyBuf.get(expectedArpReplyPacket) |
| assertContentEquals( |
| expectedArpReplyPacket + ByteArray(18) {0}, |
| transmittedPacket |
| ) |
| assertEquals( |
| mapOf<Counter, Long>( |
| TOTAL_PACKETS to 1, |
| DROPPED_ARP_REQUEST_REPLIED to 1 |
| ), |
| decodeCountersIntoMap(data) |
| ) |
| apfFilter.shutdown() |
| } |
| |
| private fun decodeCountersIntoMap(counterBytes: ByteArray): Map<Counter, Long> { |
| val counters = Counter::class.java.enumConstants |
| val ret = HashMap<Counter, Long>() |
| val skippedCounters = setOf(APF_PROGRAM_ID, APF_VERSION) |
| // starting from index 2 to skip the endianness mark |
| for (c in listOf(*counters).subList(2, counters.size)) { |
| if (c in skippedCounters) continue |
| val value = ApfCounterTracker.getCounterValue(counterBytes, c) |
| if (value != 0L) { |
| ret[c] = value |
| } |
| } |
| return ret |
| } |
| |
| private fun encodeInstruction(opcode: Int, immLength: Int, register: Int): Byte { |
| val immLengthEncoding = if (immLength == 4) 3 else immLength |
| return opcode.shl(3).or(immLengthEncoding.shl(1)).or(register).toByte() |
| } |
| |
| private fun ByteArray.skipDataAndDebug(): ByteArray { |
| assertEquals( |
| listOf( |
| encodeInstruction(14, 2, 1), |
| 0, |
| 0, |
| encodeInstruction(21, 1, 0), |
| 48 |
| // the actual exception buffer size is not checked here. |
| ), |
| this.take(5) |
| ) |
| return this.drop(7).toByteArray() |
| } |
| |
| private fun getDefaultConfig(): ApfFilter.ApfConfiguration { |
| val config = ApfFilter.ApfConfiguration() |
| config.apfCapabilities = |
| ApfCapabilities(APF_VERSION_6, 4096, ARPHRD_ETHER) |
| config.multicastFilter = false |
| config.ieee802_3Filter = false |
| config.ethTypeBlackList = IntArray(0) |
| return config |
| } |
| |
| companion object { |
| const val ETH_HLEN = 14 |
| const val IPV4_HLEN = 20 |
| const val IPPROTO_UDP = 17 |
| } |
| } |