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Implement UDP exchange in Kotlin/Native
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218 changes: 83 additions & 135 deletions
218
library/src/appleMain/kotlin/com/tidal/networktime/internal/NTPUDPSocketOperations.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,158 +1,106 @@ | ||
| package com.tidal.networktime.internal | ||
|
|
||
| import com.tidal.networktime.ProtocolFamily | ||
| import kotlinx.cinterop.ByteVar | ||
| import kotlinx.cinterop.CPointer | ||
| import kotlinx.cinterop.ExperimentalForeignApi | ||
| import kotlinx.cinterop.StableRef | ||
| import kotlinx.cinterop.alloc | ||
| import kotlinx.cinterop.asStableRef | ||
| import kotlinx.cinterop.allocArray | ||
| import kotlinx.cinterop.convert | ||
| import kotlinx.cinterop.memScoped | ||
| import kotlinx.cinterop.pointed | ||
| import kotlinx.cinterop.ptr | ||
| import kotlinx.cinterop.refTo | ||
| import kotlinx.cinterop.reinterpret | ||
| import kotlinx.cinterop.sizeOf | ||
| import kotlinx.cinterop.staticCFunction | ||
| import kotlinx.cinterop.toCPointer | ||
| import kotlinx.cinterop.toLong | ||
| import kotlinx.cinterop.value | ||
| import kotlinx.coroutines.delay | ||
| import kotlinx.cinterop.set | ||
| import kotlinx.coroutines.CompletableDeferred | ||
| import kotlinx.coroutines.withTimeout | ||
| import platform.CoreFoundation.CFDataCreate | ||
| import platform.CoreFoundation.CFDataGetBytes | ||
| import platform.CoreFoundation.CFDataGetLength | ||
| import platform.CoreFoundation.CFDataRefVar | ||
| import platform.CoreFoundation.CFRangeMake | ||
| import platform.CoreFoundation.CFSocketCallBack | ||
| import platform.CoreFoundation.CFSocketConnectToAddress | ||
| import platform.CoreFoundation.CFSocketContext | ||
| import platform.CoreFoundation.CFSocketCreate | ||
| import platform.CoreFoundation.CFSocketInvalidate | ||
| import platform.CoreFoundation.CFSocketRef | ||
| import platform.CoreFoundation.CFSocketSendData | ||
| import platform.CoreFoundation.kCFAllocatorDefault | ||
| import platform.CoreFoundation.kCFSocketDataCallBack | ||
| import platform.darwin.inet_aton | ||
| import platform.darwin.inet_pton | ||
| import platform.posix.AF_INET | ||
| import platform.posix.AF_INET6 | ||
| import platform.posix.IPPROTO_UDP | ||
| import platform.posix.PF_INET | ||
| import platform.posix.PF_INET6 | ||
| import platform.posix.SIGPIPE | ||
| import platform.posix.SIG_IGN | ||
| import platform.posix.SOCK_DGRAM | ||
| import platform.posix.signal | ||
| import platform.posix.sockaddr_in | ||
| import platform.posix.sockaddr_in6 | ||
| import platform.Network.NW_CONNECTION_FINAL_MESSAGE_CONTEXT | ||
| import platform.Network.NW_PARAMETERS_DEFAULT_CONFIGURATION | ||
| import platform.Network.NW_PARAMETERS_DISABLE_PROTOCOL | ||
| import platform.Network.nw_connection_create | ||
| import platform.Network.nw_connection_force_cancel | ||
| import platform.Network.nw_connection_receive | ||
| import platform.Network.nw_connection_send | ||
| import platform.Network.nw_connection_set_queue | ||
| import platform.Network.nw_connection_set_state_changed_handler | ||
| import platform.Network.nw_connection_start | ||
| import platform.Network.nw_connection_state_cancelled | ||
| import platform.Network.nw_connection_state_failed | ||
| import platform.Network.nw_connection_state_ready | ||
| import platform.Network.nw_connection_state_t | ||
| import platform.Network.nw_connection_t | ||
| import platform.Network.nw_endpoint_create_host | ||
| import platform.Network.nw_error_t | ||
| import platform.Network.nw_parameters_create_secure_udp | ||
| import platform.darwin._dispatch_data_destructor_free | ||
| import platform.darwin.dispatch_data_apply | ||
| import platform.darwin.dispatch_data_create | ||
| import platform.darwin.dispatch_data_t | ||
| import platform.darwin.dispatch_get_current_queue | ||
| import platform.posix.memcpy | ||
| import kotlin.test.assertEquals | ||
| import kotlin.test.assertNull | ||
| import kotlin.time.Duration | ||
| import kotlin.time.Duration.Companion.seconds | ||
| import kotlin.time.DurationUnit | ||
|
|
||
| @OptIn(ExperimentalForeignApi::class) | ||
| @Suppress("EXPECT_ACTUAL_CLASSIFIERS_ARE_IN_BETA_WARNING") | ||
| internal actual class NTPUDPSocketOperations { | ||
| private var cfSocket: CFSocketRef? = null | ||
| private var userDataRef: StableRef<UserData>? = null | ||
| private var connection: nw_connection_t = null | ||
|
|
||
| actual suspend fun prepareSocket( | ||
| address: String, | ||
| protocolFamily: ProtocolFamily, | ||
| portNumber: Int, | ||
| connectTimeout: Duration, | ||
| ) { | ||
| userDataRef = StableRef.create(UserData()) | ||
| val callback: CFSocketCallBack = staticCFunction { _, callbackType, _, data, info -> | ||
| val userData = info!!.asStableRef<UserData>().get() | ||
| if (callbackType != kCFSocketDataCallBack) { | ||
| return@staticCFunction | ||
| } | ||
| val reinterpretedData = data!!.reinterpret<CFDataRefVar>().pointed.value | ||
| val length = CFDataGetLength(reinterpretedData) | ||
| val range = CFRangeMake(0, length) | ||
| val bridgeBuffer = UByteArray(length.toInt()) | ||
| CFDataGetBytes(reinterpretedData, range, bridgeBuffer.refTo(0)) | ||
| userData.apply { | ||
| buffer = bridgeBuffer.toByteArray() | ||
| exchangeCompleted = true | ||
| actual suspend fun prepare(address: String, portNumber: Int, connectTimeout: Duration) { | ||
| val parameters = nw_parameters_create_secure_udp( | ||
| NW_PARAMETERS_DISABLE_PROTOCOL, | ||
| NW_PARAMETERS_DEFAULT_CONFIGURATION | ||
| ) | ||
| val endpoint = nw_endpoint_create_host(address, portNumber.toString()) | ||
| connection = nw_connection_create(endpoint, parameters) | ||
| nw_connection_set_queue(connection, dispatch_get_current_queue()) | ||
| val connectionStateDeferred = CompletableDeferred<nw_connection_state_t>() | ||
| nw_connection_set_state_changed_handler(connection) { state: nw_connection_state_t, _ -> | ||
| when (state) { | ||
| nw_connection_state_ready, nw_connection_state_failed, nw_connection_state_cancelled -> | ||
| connectionStateDeferred.complete(state) | ||
| } | ||
| } | ||
| signal(SIGPIPE, SIG_IGN) | ||
| cfSocket = memScoped { | ||
| val socketContext = alloc<CFSocketContext> { | ||
| version = 0 | ||
| info = userDataRef!!.asCPointer() | ||
| retain = null | ||
| release = null | ||
| copyDescription = null | ||
| } | ||
| val socket = CFSocketCreate( | ||
| kCFAllocatorDefault, | ||
| when (protocolFamily) { | ||
| ProtocolFamily.INET -> PF_INET | ||
| ProtocolFamily.INET6 -> PF_INET6 | ||
| }, | ||
| SOCK_DGRAM, | ||
| IPPROTO_UDP, | ||
| kCFSocketDataCallBack, | ||
| callback, | ||
| socketContext.ptr, | ||
| ) | ||
| val addrCFDataRef = when (protocolFamily) { | ||
| ProtocolFamily.INET -> alloc<sockaddr_in> { | ||
| sin_family = AF_INET.toUByte() | ||
| sin_port = portNumber.toUShort() | ||
| inet_aton(address, sin_addr.ptr) | ||
| }.run { | ||
| CFDataCreate(kCFAllocatorDefault, ptr.toLong().toCPointer(), sizeOf<sockaddr_in>()) | ||
| } | ||
|
|
||
| ProtocolFamily.INET6 -> { | ||
| alloc<sockaddr_in6> { | ||
| sin6_family = AF_INET6.toUByte() | ||
| sin6_port = portNumber.toUShort() | ||
| inet_pton(AF_INET6, address, sin6_addr.ptr) | ||
| }.run { | ||
| CFDataCreate(kCFAllocatorDefault, ptr.toLong().toCPointer(), sizeOf<sockaddr_in6>()) | ||
| } | ||
| } | ||
| } | ||
| CFSocketConnectToAddress( | ||
| socket, | ||
| addrCFDataRef, | ||
| connectTimeout.toDouble(DurationUnit.MILLISECONDS), | ||
| ) | ||
| socket | ||
| nw_connection_start(connection) | ||
| withTimeout(connectTimeout) { | ||
| assertEquals(nw_connection_state_ready, connectionStateDeferred.await()) | ||
| } | ||
| } | ||
|
|
||
| actual suspend fun exchangeInPlace(buffer: ByteArray, readTimeout: Duration) { | ||
| val bufferCFDataRef = CFDataCreate( | ||
| kCFAllocatorDefault, | ||
| buffer.asUByteArray().refTo(0), | ||
| buffer.size.toLong(), | ||
| ) | ||
| CFSocketSendData( | ||
| cfSocket, | ||
| null, | ||
| bufferCFDataRef, | ||
| Duration.INFINITE.toDouble(DurationUnit.MILLISECONDS), | ||
| ) | ||
| withTimeout(readTimeout) { | ||
| while (!userDataRef!!.get().exchangeCompleted) { | ||
| delay(1.seconds) | ||
| @OptIn(ExperimentalForeignApi::class) | ||
| actual suspend fun exchange(buffer: ByteArray, readTimeout: Duration) { | ||
| val toSendData = memScoped { | ||
| val cArray = allocArray<ByteVar>(buffer.size) | ||
| buffer.forEachIndexed { i, it -> | ||
| cArray[i] = it | ||
| } | ||
| cArray | ||
| } | ||
| nw_connection_send( | ||
| connection, | ||
| dispatch_data_create(toSendData, buffer.size.convert(), null, _dispatch_data_destructor_free), | ||
| NW_CONNECTION_FINAL_MESSAGE_CONTEXT, | ||
| true | ||
| ) { | ||
| assertNull(it) | ||
| } | ||
| val connectionReceptionDeferred = CompletableDeferred<dispatch_data_t>() | ||
| nw_connection_receive( | ||
| connection, | ||
| 1.convert(), | ||
| buffer.size.convert() | ||
| ) { content: dispatch_data_t, _, _, error: nw_error_t -> | ||
| assertNull(error) | ||
| connectionReceptionDeferred.complete(content) | ||
| } | ||
| val receivedData = withTimeout(readTimeout) { | ||
| connectionReceptionDeferred.await() | ||
| } | ||
| dispatch_data_apply(receivedData) { _, _, regionPointer, _ -> | ||
| memcpy(buffer.refTo(0), regionPointer!!.reinterpret<ByteVar>(), buffer.size.convert()) | ||
| false | ||
| } | ||
| } | ||
|
|
||
| actual fun closeSocket() { | ||
| CFSocketInvalidate(cfSocket) | ||
| cfSocket = null | ||
| userDataRef?.dispose() | ||
| userDataRef = null | ||
| } | ||
|
|
||
| private class UserData { | ||
| var exchangeCompleted = false | ||
| var buffer: ByteArray = byteArrayOf() | ||
| actual fun tearDown() { | ||
| nw_connection_force_cancel(connection) | ||
| connection = null | ||
| } | ||
| } |
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