public function handlePacket(Packet $packet) { $this->isActive = \true; $this->lastUpdate = \microtime(\true); if ($this->state === self::STATE_CONNECTED or $this->state === self::STATE_CONNECTING_2) { if ($packet::$ID >= 0x80 and $packet::$ID <= 0x8f and $packet instanceof DataPacket) { //Data packet $packet->decode(); if ($packet->seqNumber < $this->windowStart or $packet->seqNumber > $this->windowEnd or isset($this->receivedWindow[$packet->seqNumber])) { return; } $diff = $packet->seqNumber - $this->lastSeqNumber; unset($this->NACKQueue[$packet->seqNumber]); $this->ACKQueue[$packet->seqNumber] = $packet->seqNumber; $this->receivedWindow[$packet->seqNumber] = $packet->seqNumber; if ($diff !== 1) { for ($i = $this->lastSeqNumber + 1; $i < $packet->seqNumber; ++$i) { if (!isset($this->receivedWindow[$i])) { $this->NACKQueue[$i] = $i; } } } if ($diff >= 1) { $this->lastSeqNumber = $packet->seqNumber; $this->windowStart += $diff; $this->windowEnd += $diff; } foreach ($packet->packets as $pk) { $this->handleEncapsulatedPacket($pk); } } else { if ($packet instanceof ACK) { $packet->decode(); foreach ($packet->packets as $seq) { if (isset($this->recoveryQueue[$seq])) { foreach ($this->recoveryQueue[$seq]->packets as $pk) { if ($pk instanceof EncapsulatedPacket and $pk->needACK and $pk->messageIndex !== \null) { unset($this->needACK[$pk->identifierACK][$pk->messageIndex]); } } unset($this->recoveryQueue[$seq]); } } } elseif ($packet instanceof NACK) { $packet->decode(); foreach ($packet->packets as $seq) { if (isset($this->recoveryQueue[$seq])) { $pk = $this->recoveryQueue[$seq]; $pk->seqNumber = $this->sendSeqNumber++; $this->packetToSend[] = $pk; unset($this->recoveryQueue[$seq]); } } } } } elseif ($packet::$ID > 0x0 and $packet::$ID < 0x80) { //Not Data packet :) $packet->decode(); if ($packet instanceof UNCONNECTED_PING) { $pk = new UNCONNECTED_PONG(); $pk->serverID = $this->sessionManager->getID(); $pk->pingID = $packet->pingID; $pk->serverName = $this->sessionManager->getName(true); $this->sendPacket($pk); $pk->serverName = $this->sessionManager->getName(false); $this->sendPacket($pk); } elseif ($packet instanceof OPEN_CONNECTION_REQUEST_1) { $packet->protocol; //TODO: check protocol number and refuse connections $pk = new OPEN_CONNECTION_REPLY_1(); $pk->mtuSize = $packet->mtuSize; $pk->serverID = $this->sessionManager->getID(); $this->sendPacket($pk); $this->state = self::STATE_CONNECTING_1; } elseif ($this->state === self::STATE_CONNECTING_1 and $packet instanceof OPEN_CONNECTION_REQUEST_2) { $this->id = $packet->clientID; if ($packet->serverPort === $this->sessionManager->getPort() or !$this->sessionManager->portChecking) { $this->mtuSize = \min(\abs($packet->mtuSize), 1464); //Max size, do not allow creating large buffers to fill server memory $pk = new OPEN_CONNECTION_REPLY_2(); $pk->mtuSize = $this->mtuSize; $pk->serverID = $this->sessionManager->getID(); $pk->clientAddress = $this->address; $pk->clientPort = $this->port; $this->sendPacket($pk); $this->state = self::STATE_CONNECTING_2; } } } }