34 lines
1.1 KiB
Kotlin
34 lines
1.1 KiB
Kotlin
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/*
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* Copyright © 2026 RTAkland
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* Author: RTAkland
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* Date: 2026/9/3
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*/
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package cn.rtast.mcping.bedrock
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import cn.rtast.mcping.PingResponse
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import cn.rtast.mcping.platform.PingContext
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import cn.rtast.mcping.platform.UdpSocket
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import cn.rtast.mcping.platform.wrap
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import kotlin.time.Clock
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internal fun pingBedrockServer(host: String, port: Int, context: PingContext): PingResponse {
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val socket = UdpSocket(host, port, context)
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return try {
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val sendTime = Clock.System.now().toEpochMilliseconds()
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val packet = BedrockRequestPacket(sendTime)
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val responseBytes = socket.sendPacket(packet)
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val receiveTime = Clock.System.now().toEpochMilliseconds()
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val buf = responseBytes.wrap()
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buf.readByte() // packet id
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buf.readLong() // time
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buf.readLong() // server guid
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buf.readBytes(16) // magic refer to `rakNetMagic`
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val payloadLength = buf.readShort()
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val payload = buf.readBytes(payloadLength.toInt())
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PingResponse(payload.decodeToString(), (receiveTime - sendTime).toInt())
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} finally {
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socket.close()
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}
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}
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