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Merge branch 'stable' into next-minor

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This commit is contained in:
Dylan K. Taylor
2023-01-12 19:02:07 +00:00
parent 5021096bdd c5056e0a43
commit d74719704e
5 changed files with 133 additions and 60 deletions
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42
src/network/mcpe/NetworkSession.php
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@ -128,20 +128,39 @@ use function array_values;
use function base64_encode;
use function bin2hex;
use function count;
use function function_exists;
use function get_class;
use function hrtime;
use function in_array;
use function intdiv;
use function json_encode;
use function ksort;
use function min;
use function strcasecmp;
use function strlen;
use function strtolower;
use function substr;
use function time;
use function ucfirst;
use function xdebug_is_debugger_active;
use const JSON_THROW_ON_ERROR;
use const SORT_NUMERIC;
class NetworkSession{
private const INCOMING_PACKET_BATCH_PER_TICK = 2; //usually max 1 per tick, but transactions may arrive separately
private const INCOMING_PACKET_BATCH_MAX_BUDGET = 100; //enough to account for a 5-second lag spike
/**
* At most this many more packets can be received. If this reaches zero, any additional packets received will cause
* the player to be kicked from the server.
* This number is increased every tick up to a maximum limit.
*
* @see self::INCOMING_PACKET_BATCH_PER_TICK
* @see self::INCOMING_PACKET_BATCH_MAX_BUDGET
*/
private int $incomingPacketBatchBudget = self::INCOMING_PACKET_BATCH_MAX_BUDGET;
private int $lastPacketBudgetUpdateTimeNs;
private \PrefixedLogger $logger;
private ?Player $player = null;
private ?PlayerInfo $info = null;
@ -199,6 +218,7 @@ class NetworkSession{
$this->disposeHooks = new ObjectSet();
$this->connectTime = time();
$this->lastPacketBudgetUpdateTimeNs = hrtime(true);
$this->setHandler(new SessionStartPacketHandler(
$this->server,
@ -339,6 +359,17 @@ class NetworkSession{
return;
}
if($this->incomingPacketBatchBudget <= 0){
if(!function_exists('xdebug_is_debugger_active') || !xdebug_is_debugger_active()){
throw new PacketHandlingException("Receiving packets too fast");
}else{
//when a debugging session is active, the server may halt at any point for an indefinite length of time,
//in which time the client will continue to send packets
$this->incomingPacketBatchBudget = self::INCOMING_PACKET_BATCH_MAX_BUDGET;
}
}
$this->incomingPacketBatchBudget--;
if($this->cipher !== null){
Timings::$playerNetworkReceiveDecrypt->startTiming();
try{
@ -1138,5 +1169,16 @@ class NetworkSession{
}
$this->flushSendBuffer();
$nowNs = hrtime(true);
$timeSinceLastUpdateNs = $nowNs - $this->lastPacketBudgetUpdateTimeNs;
if($timeSinceLastUpdateNs > 50_000_000){
$ticksSinceLastUpdate = intdiv($timeSinceLastUpdateNs, 50_000_000);
$this->incomingPacketBatchBudget = min(
$this->incomingPacketBatchBudget + (self::INCOMING_PACKET_BATCH_PER_TICK * 2 * $ticksSinceLastUpdate),
self::INCOMING_PACKET_BATCH_MAX_BUDGET
);
$this->lastPacketBudgetUpdateTimeNs = $nowNs;
}
}
}