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started more or less MP internet protocols

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This commit is contained in:
Sergey Chernov 2023-11-12 04:26:17 +03:00
parent 770555024f
commit 6c10c2e578
12 changed files with 358 additions and 2 deletions
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2
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@ -4,7 +4,7 @@
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2
build.gradle.kts
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@ -17,7 +17,7 @@ repositories {
kotlin {
jvm {
jvmToolchain(11)
jvmToolchain(8)
withJava()
testRuns.named("test") {
executionTask.configure {

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src/commonMain/kotlin/net/sergeych/kiloparsec/adapter/NetworkProvider.kt Normal file
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@ -0,0 +1,37 @@
package net.sergeych.kiloparsec.adapter
import kotlinx.coroutines.channels.ReceiveChannel
/**
* Multiplatform implementation of an internet address.
* Notice to implementors. It must provide correct and effective [equals] and [hashCode].
*/
interface NetworkAddress {
val host: String
val port: Int
}
/**
* Multiplatform datagram abstraction
*/
interface Datagram {
val message: UByteArray
val address: NetworkAddress
suspend fun respondWith(message: UByteArray)
}
interface DatagramReceiver {
val incoming: ReceiveChannel<Datagram>
suspend fun send(message: UByteArray, networkAddress: NetworkAddress)
@Suppress("unused")
suspend fun send(message: UByteArray, datagramAddress: String) {
send(message, networkAddressOf(datagramAddress))
}
suspend fun send(message: UByteArray,host: String,port: Int) =
send(message, NetworkAddress(host,port))
fun close()
}
expect fun networkAddressOf(address: String): NetworkAddress
expect fun NetworkAddress(host: String,port: Int): NetworkAddress

5
src/jsMain/kotlin/net/sergeych/kiloparsec/adapter/DatagramProvider.js.kt Normal file
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@ -0,0 +1,5 @@
package net.sergeych.kiloparsec.adapter
actual fun networkAddressOf(address: String): NetworkAddress {
TODO("Not yet implemented")
}

5
src/jsMain/kotlin/net/sergeych/kiloparsec/adapter/NetworkProvider.js.kt Normal file
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@ -0,0 +1,5 @@
package net.sergeych.kiloparsec.adapter
actual fun NetworkAddress(host: String, port: Int): NetworkAddress {
TODO("Not yet implemented")
}

8
src/jvmMain/kotlin/net/sergeych/kiloparsec/adapter/DatagramProvider.jvm.kt Normal file
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@ -0,0 +1,8 @@
package net.sergeych.kiloparsec.adapter
import java.net.InetAddress
actual fun networkAddressOf(address: String): NetworkAddress {
val (host,port) = address.split(":")
return JvmNetworkAddress(InetAddress.getByName(host), port.toInt())
}

6
src/jvmMain/kotlin/net/sergeych/kiloparsec/adapter/NetworkProvider.jvm.kt Normal file
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@ -0,0 +1,6 @@
package net.sergeych.kiloparsec.adapter
import java.net.InetAddress
actual fun NetworkAddress(host: String, port: Int): NetworkAddress =
JvmNetworkAddress(InetAddress.getByName(host), port)

135
src/jvmMain/kotlin/net/sergeych/kiloparsec/adapter/UdpServer.kt Normal file
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@ -0,0 +1,135 @@
package net.sergeych.kiloparsec.adapter
import kotlinx.coroutines.*
import kotlinx.coroutines.channels.BufferOverflow
import kotlinx.coroutines.channels.Channel
import kotlinx.coroutines.sync.Mutex
import kotlinx.coroutines.sync.withLock
import net.sergeych.mp_logger.LogTag
import net.sergeych.mp_logger.exception
import net.sergeych.mp_logger.info
import net.sergeych.mp_logger.warning
import java.net.DatagramPacket
import java.net.DatagramSocket
import java.net.InetAddress
import java.util.concurrent.atomic.AtomicInteger
private val counter = AtomicInteger(0)
class JvmNetworkAddress(val inetAddress: InetAddress, override val port: Int) : NetworkAddress {
override val host: String by lazy { inetAddress.hostName }
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is JvmNetworkAddress) return false
if (inetAddress != other.inetAddress) return false
if (port != other.port) return false
return true
}
override fun hashCode(): Int {
var result = inetAddress.hashCode()
result = 31 * result + port
return result
}
}
class UdpDatagram(override val message: UByteArray, val inetAddress: InetAddress, val port: Int) : Datagram {
override val address: NetworkAddress by lazy {
JvmNetworkAddress(inetAddress, port)
}
private val access = Mutex()
private var socket: DatagramSocket? = null
override suspend fun respondWith(message: UByteArray) {
withContext(Dispatchers.IO) {
access.withLock {
if (socket == null) socket = DatagramSocket()
val packet = DatagramPacket(
message.toByteArray(),
message.size,
inetAddress,
port
)
socket!!.send(packet)
}
}
}
}
@OptIn(DelicateCoroutinesApi::class)
class UdpServer(val port: Int) :
DatagramReceiver, LogTag("UDPS:${counter.incrementAndGet()}") {
private var isClosed = false
private val deferredSocket = CompletableDeferred<DatagramSocket>()
private var job: Job? = null
private suspend fun start() = try {
coroutineScope {
val socket = DatagramSocket(port)
val buffer = ByteArray(16384)
val packet = DatagramPacket(buffer, buffer.size)
deferredSocket.complete(socket)
while (isActive && !isClosed) {
try {
socket.receive(packet)
val data = packet.data.sliceArray(0..<packet.length)
val datagram = UdpDatagram(data.toUByteArray(), packet.address, packet.port)
if (!channel.trySend(datagram).isSuccess) {
warning { "packet lost!" }
// and we cause overflow that overwrites the oldest
channel.send(datagram)
}
} catch (e: Exception) {
if (!isClosed)
e.printStackTrace()
throw e
}
}
info { "closing socket and reception loop" }
}
} catch (_: CancellationException) {
info { "server is closed" }
} catch (t: Throwable) {
exception { "unexpected end of server" to t }
}
init {
job = GlobalScope.launch(Dispatchers.IO) {
start()
}
}
override fun close() {
if (!isClosed) {
if (deferredSocket.isCompleted) {
runCatching {
deferredSocket.getCompleted().close()
}
}
isClosed = true
job?.cancel(); job = null
}
}
private val channel = Channel<Datagram>(2048, BufferOverflow.DROP_OLDEST)
override val incoming = channel
override suspend fun send(message: UByteArray, networkAddress: NetworkAddress) {
networkAddress as JvmNetworkAddress
withContext(Dispatchers.IO) {
val packet = DatagramPacket(
message.toByteArray(), message.size,
networkAddress.inetAddress, networkAddress.port
)
deferredSocket.await().send(packet)
}
}
}

26
src/jvmTest/kotlin/net/sergeych/kiloparsec/adapters/UServerTest.kt Normal file
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@ -0,0 +1,26 @@
package net.sergeych.kiloparsec.adapters
import com.ionspin.kotlin.crypto.util.encodeToUByteArray
import kotlinx.coroutines.test.runTest
import net.sergeych.kiloparsec.adapter.UdpServer
import net.sergeych.mp_logger.Log
import org.junit.jupiter.api.Assertions.assertEquals
import kotlin.test.Test
class UServerTest {
@Test
fun udpProvider() = runTest {
Log.connectConsole(Log.Level.DEBUG)
val s1 = UdpServer(17120)
val s2 = UdpServer(17121)
s1.send("Hello".encodeToUByteArray(), "localhost",17121)
val d1 = s2.incoming.receive()
assertEquals(d1.address.port, 17120)
assertEquals("Hello", d1.message.toByteArray().decodeToString())
d1.respondWith("world".encodeToUByteArray())
assertEquals("world", s1.incoming.receive().message.toByteArray().decodeToString())
// println("s1: ${s1.bindAddress()}")
}
}

5
src/nativeMain/kotlin/net/sergeych/kiloparsec/adapter/DatagramProvider.native.kt Normal file
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@ -0,0 +1,5 @@
package net.sergeych.kiloparsec.adapter
actual fun networkAddressOf(address: String): NetworkAddress {
TODO("Not yet implemented")
}

5
src/nativeMain/kotlin/net/sergeych/kiloparsec/adapter/NetworkProvider.native.kt Normal file
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@ -0,0 +1,5 @@
package net.sergeych.kiloparsec.adapter
actual fun NetworkAddress(host: String, port: Int): NetworkAddress {
TODO("Not yet implemented")
}