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token ring stuff wip

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minjaesong
2025-02-28 22:44:57 +09:00
parent e889b397d0
commit f154b2348b
1 changed files with 22 additions and 5 deletions
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27
src/net/torvald/terrarum/modulebasegame/gameworld/IngameNetPacket.kt
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@@ -1,8 +1,6 @@
package net.torvald.terrarum.modulebasegame.gameworld package net.torvald.terrarum.modulebasegame.gameworld
import net.torvald.terrarum.serialise.toBigInt32 import net.torvald.terrarum.serialise.*
import net.torvald.terrarum.serialise.toUint
import net.torvald.terrarum.serialise.writeBigInt32
import java.util.zip.CRC32 import java.util.zip.CRC32
/** /**
@@ -42,6 +40,11 @@ import java.util.zip.CRC32
* - (Bytes) The actual data * - (Bytes) The actual data
* - (Byte4) CRC-32 of the actual data * - (Byte4) CRC-32 of the actual data
* *
* ## Acknowledgement
*
* - (Byte4) Receiver MAC address
* - (Byte2) Optional status, should be set to 0 if not used; value of 65535 (all bits set) is reserved for negative acknowledgement
*
* Created by minjaesong on 2025-02-27. * Created by minjaesong on 2025-02-27.
*/ */
data class IngameNetPacket(val byteArray: ByteArray) { data class IngameNetPacket(val byteArray: ByteArray) {
@@ -50,6 +53,7 @@ data class IngameNetPacket(val byteArray: ByteArray) {
return when (byteArray.first().toUint()) { return when (byteArray.first().toUint()) {
0xff -> "token" 0xff -> "token"
0xaa -> "data" 0xaa -> "data"
0x55 -> "ack"//nowledgement
0xee -> "abort" 0xee -> "abort"
0x99 -> "ballot" 0x99 -> "ballot"
0x00 -> "invalid" 0x00 -> "invalid"
@@ -59,6 +63,8 @@ data class IngameNetPacket(val byteArray: ByteArray) {
private fun checkIsToken() { if (getFrameType() != "token") throw Error() } private fun checkIsToken() { if (getFrameType() != "token") throw Error() }
private fun checkIsData() { if (getFrameType() != "data") throw Error() } private fun checkIsData() { if (getFrameType() != "data") throw Error() }
private fun checkIsAck() { if (getFrameType() != "ack") throw Error() }
private fun checkIsDataOrAck() { if (getFrameType() != "data" && getFrameType() != "ack") throw Error() }
private fun checkIsAbort() { if (getFrameType() != "abort") throw Error() } private fun checkIsAbort() { if (getFrameType() != "abort") throw Error() }
private fun checkIsBallot() { if (getFrameType() != "ballot") throw Error() } private fun checkIsBallot() { if (getFrameType() != "ballot") throw Error() }
@@ -74,7 +80,7 @@ data class IngameNetPacket(val byteArray: ByteArray) {
fun shouldIintercept(mac: Int) = when (getFrameType()) { fun shouldIintercept(mac: Int) = when (getFrameType()) {
"ballot" -> (getBallot() < mac) "ballot" -> (getBallot() < mac)
"data" -> (getDataRecipient() == mac) "data", "ack" -> (getDataRecipient() == mac)
else -> false else -> false
} }
@@ -91,8 +97,13 @@ data class IngameNetPacket(val byteArray: ByteArray) {
return if (crc != crc0) null else ret return if (crc != crc0) null else ret
} }
fun getAckStatus(): Int {
checkIsAck()
return byteArray.toBigInt16(10)
}
fun getDataRecipient(): Int { fun getDataRecipient(): Int {
checkIsData() checkIsDataOrAck()
return byteArray.toBigInt32(6) return byteArray.toBigInt32(6)
} }
@@ -117,6 +128,12 @@ data class IngameNetPacket(val byteArray: ByteArray) {
val crc = CRC32().also { it.update(data) }.value.toInt() val crc = CRC32().also { it.update(data) }.value.toInt()
it.writeBigInt32(crc, 14 + data.size) it.writeBigInt32(crc, 14 + data.size)
} }
fun makeAck(sender: Int, recipient: Int, status: Int = 0) = ByteArray(12).also {
it.makeHeader(0x55, sender)
it.writeBigInt32(recipient, 6)
it.writeBigInt16(status, 10)
}
} }
} }