PHPDaemon\Clients\DNS\Connection::onRead PHP Method

    public function onRead()
    {
        start:
        if ($this->type === 'udp') {
            $this->onUdpPacket($this->read($this->getInputLength()));
            return;
        }
        if ($this->state === self::STATE_ROOT) {
            if (false === ($hdr = $this->readExact(2))) {
                return;
                // not enough data
            }
            $this->pctSize = Binary::bytes2int($hdr);
            $this->setWatermark($this->pctSize);
            $this->state = self::STATE_PACKET;
        }
        if ($this->state === self::STATE_PACKET) {
            if (false === ($pct = $this->readExact($this->pctSize))) {
                return;
                // not enough data
            }
            $this->state = self::STATE_ROOT;
            $this->setWatermark(2);
            $this->onUdpPacket($pct);
        }
        goto start;
    }