A bug in RdmaHw

[lxvxl]

In RdmaHw::ReceiveUdp:

int RdmaHw::ReceiveUdp(Ptr<Packet> p, CustomHeader &ch){
	uint8_t ecnbits = ch.GetIpv4EcnBits();

	uint32_t payload_size = p->GetSize() - ch.GetSerializedSize();

	// TODO find corresponding rx queue pair
	Ptr<RdmaRxQueuePair> rxQp = GetRxQp(ch.dip, ch.sip, ch.udp.dport, ch.udp.sport, ch.udp.pg, true);
	if (ecnbits != 0){
		rxQp->m_ecn_source.ecnbits |= ecnbits;
		rxQp->m_ecn_source.qfb++;
	}
	rxQp->m_ecn_source.total++;
	rxQp->m_milestone_rx = m_ack_interval;

The rxQp->m_milestone_rx is assigned to m_ack_interval for each Udp packet received. The correct approach is assign rxQp->m_milestone_rx to m_ack_interval when rxQp->m_milestone_rx is 0. Otherwise, there will be mistakes when ack_interval is adjusted to a larger value.