satellite-orbiter-user-mac.cc

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2013 Magister Solutions Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Author: Bastien Tauran <bastien.tauran@viveris.fr>
 */
 
#include "satellite-orbiter-user-mac.h"
 
#include "satellite-address-tag.h"
#include "satellite-mac.h"
#include "satellite-signal-parameters.h"
#include "satellite-time-tag.h"
#include "satellite-uplink-info-tag.h"
#include "satellite-utils.h"
 
#include "ns3/double.h"
#include "ns3/enum.h"
#include "ns3/log.h"
#include "ns3/pointer.h"
#include "ns3/simulator.h"
#include "ns3/uinteger.h"
 
NS_LOG_COMPONENT_DEFINE("SatOrbiterUserMac");
 
namespace ns3
{
 
NS_OBJECT_ENSURE_REGISTERED(SatOrbiterUserMac);
 
TypeId
SatOrbiterUserMac::GetTypeId(void)
{
    static TypeId tid = TypeId("ns3::SatOrbiterUserMac")
                            .SetParent<SatOrbiterMac>()
                            .AddConstructor<SatOrbiterUserMac>()
                            .AddAttribute("GuardTime",
                                          "Guard time in this fwd user link scheduler",
                                          TimeValue(MicroSeconds(1)),
                                          MakeTimeAccessor(&SatOrbiterMac::GetGuardTime,
                                                           &SatOrbiterMac::SetGuardTime),
                                          MakeTimeChecker());
    return tid;
}
 
SatOrbiterUserMac::SatOrbiterUserMac(void)
{
    NS_LOG_FUNCTION(this);
    NS_FATAL_ERROR("SatOrbiterUserMac default constructor is not allowed to use");
}
 
SatOrbiterUserMac::SatOrbiterUserMac(uint32_t satId, uint32_t beamId)
    : SatOrbiterMac(satId, beamId)
{
    NS_LOG_FUNCTION(this << satId << beamId);
}
 
SatOrbiterUserMac::~SatOrbiterUserMac()
{
    NS_LOG_FUNCTION(this);
}
 
void
SatOrbiterUserMac::DoDispose()
{
    NS_LOG_FUNCTION(this);
 
    m_peers.clear();
 
    Object::DoDispose();
}
 
void
SatOrbiterUserMac::DoInitialize()
{
    NS_LOG_FUNCTION(this);
    Object::DoInitialize();
}
 
void
SatOrbiterUserMac::EnquePacket(Ptr<Packet> packet)
{
    NS_LOG_FUNCTION(this << packet);
 
    if (!m_periodicTransmissionEnabled)
    {
        NS_LOG_INFO("Do not enque packet to this beam because it is disabled");
        return;
    }
 
    SatAddressE2ETag addressE2ETag;
    bool success = packet->PeekPacketTag(addressE2ETag);
 
    SatMacTag mTag;
    success &= packet->RemovePacketTag(mTag);
 
    if (m_forwardLinkRegenerationMode != SatEnums::REGENERATION_NETWORK)
    {
        // MAC tag and E2E address tag found
        if (success)
        {
            mTag.SetDestAddress(addressE2ETag.GetE2EDestAddress());
            mTag.SetSourceAddress(m_nodeInfo->GetMacAddress());
            packet->AddPacketTag(mTag);
        }
    }
 
    uint8_t flowId = 1;
    SatControlMsgTag ctrlTag;
    if (packet->PeekPacketTag(ctrlTag))
    {
        flowId = 0;
    }
 
    m_llc->Enque(packet, addressE2ETag.GetE2EDestAddress(), flowId);
 
    m_periodicTransmissionEnabled = true;
}
 
void
SatOrbiterUserMac::Receive(SatPhy::PacketContainer_t packets, Ptr<SatSignalParameters> rxParams)
{
    NS_LOG_FUNCTION(this);
 
    if (m_returnLinkRegenerationMode == SatEnums::REGENERATION_LINK ||
        m_returnLinkRegenerationMode == SatEnums::REGENERATION_NETWORK)
    {
        // Add packet trace entry:
        m_packetTrace(Simulator::Now(),
                      SatEnums::PACKET_RECV,
                      m_nodeInfo->GetNodeType(),
                      m_nodeInfo->GetNodeId(),
                      m_nodeInfo->GetMacAddress(),
                      SatEnums::LL_MAC,
                      SatEnums::LD_RETURN,
                      SatUtils::GetPacketInfo(packets));
 
        RxTraces(packets);
    }
 
    rxParams->m_packetsInBurst.clear();
    for (SatPhy::PacketContainer_t::iterator i = packets.begin(); i != packets.end(); i++)
    {
        // Remove packet tag
        SatMacTag macTag;
        bool mSuccess = (*i)->PeekPacketTag(macTag);
        if (!mSuccess)
        {
            NS_FATAL_ERROR("MAC tag was not found from the packet!");
        }
 
        NS_LOG_INFO("Packet from " << macTag.GetSourceAddress() << " to "
                                   << macTag.GetDestAddress());
        NS_LOG_INFO("Receiver " << m_nodeInfo->GetMacAddress());
 
        SatAddressE2ETag satAddressE2ETag;
        mSuccess = (*i)->PeekPacketTag(satAddressE2ETag);
        if (!mSuccess)
        {
            NS_FATAL_ERROR("SatAddressE2E tag was not found from the packet!");
        }
        Mac48Address destE2EAddress = satAddressE2ETag.GetE2EDestAddress();
        if (destE2EAddress == m_nodeInfo->GetMacAddress())
        {
            // Remove control msg tag
            SatControlMsgTag ctrlTag;
            bool cSuccess = (*i)->PeekPacketTag(ctrlTag);
 
            if (cSuccess)
            {
                SatControlMsgTag::SatControlMsgType_t cType = ctrlTag.GetMsgType();
 
                if (cType != SatControlMsgTag::SAT_NON_CTRL_MSG)
                {
                    ReceiveSignalingPacket(*i);
                }
                else
                {
                    NS_FATAL_ERROR("A control message received with not valid msg type!");
                }
            }
        }
        else
        {
            rxParams->m_packetsInBurst.push_back(*i);
        }
    }
 
    if (m_returnLinkRegenerationMode == SatEnums::REGENERATION_NETWORK)
    {
        for (SatPhy::PacketContainer_t::iterator i = rxParams->m_packetsInBurst.begin();
             i != rxParams->m_packetsInBurst.end();
             i++)
        {
            // Remove packet tag
            SatMacTag macTag;
            bool mSuccess = (*i)->PeekPacketTag(macTag);
            if (!mSuccess)
            {
                NS_FATAL_ERROR("MAC tag was not found from the packet!");
            }
            Mac48Address destAddress = macTag.GetDestAddress();
 
            NS_LOG_INFO("Packet from " << macTag.GetSourceAddress() << " to "
                                       << macTag.GetDestAddress());
            NS_LOG_INFO("Receiver " << m_nodeInfo->GetMacAddress());
 
            if (destAddress == m_nodeInfo->GetMacAddress() || destAddress.IsBroadcast() ||
                destAddress.IsGroup())
            {
                m_rxCallback(*i, macTag.GetSourceAddress(), macTag.GetDestAddress());
            }
        }
    }
    else
    {
        m_rxNetDeviceCallback(rxParams->m_packetsInBurst, rxParams);
    }
}
 
void
SatOrbiterUserMac::ReceiveSignalingPacket(Ptr<Packet> packet)
{
    NS_LOG_FUNCTION(this << packet);
 
    // Remove the mac tag
    SatMacTag macTag;
    packet->PeekPacketTag(macTag);
 
    // Peek control msg tag
    SatControlMsgTag ctrlTag;
    bool cSuccess = packet->PeekPacketTag(ctrlTag);
 
    if (!cSuccess)
    {
        NS_FATAL_ERROR("SatControlMsgTag not found in the packet!");
    }
 
    switch (ctrlTag.GetMsgType())
    {
    case SatControlMsgTag::SAT_CN0_REPORT: {
        uint32_t msgId = ctrlTag.GetMsgId();
        Ptr<SatCnoReportMessage> cnoReport =
            DynamicCast<SatCnoReportMessage>(m_readCtrlCallback(msgId));
 
        if (cnoReport != nullptr)
        {
            m_fwdScheduler->CnoInfoUpdated(macTag.GetSourceAddress(), cnoReport->GetCnoEstimate());
        }
        else
        {
            NS_LOG_WARN("Control message "
                        << ctrlTag.GetMsgType()
                        << " is not found from the RTN link control msg container!"
                        << " at: " << Now().GetSeconds() << "s");
        }
 
        packet->RemovePacketTag(macTag);
        packet->RemovePacketTag(ctrlTag);
 
        break;
    }
    default: {
        NS_FATAL_ERROR("Control message unkonwn on user MAC");
    }
    }
}
 
SatEnums::SatLinkDir_t
SatOrbiterUserMac::GetSatLinkTxDir()
{
    return SatEnums::LD_FORWARD;
}
 
SatEnums::SatLinkDir_t
SatOrbiterUserMac::GetSatLinkRxDir()
{
    return SatEnums::LD_RETURN;
}
 
Address
SatOrbiterUserMac::GetRxUtAddress(Ptr<Packet> packet)
{
    NS_LOG_FUNCTION(this << packet);
 
    Address utAddr; // invalid address.
 
    SatAddressE2ETag addressE2ETag;
    if (packet->PeekPacketTag(addressE2ETag))
    {
        NS_LOG_DEBUG(this << " contains a SatE2E tag");
        utAddr = addressE2ETag.GetE2ESourceAddress();
    }
 
    return utAddr;
}
 
bool
SatOrbiterUserMac::AddPeer(Mac48Address address)
{
    NS_LOG_FUNCTION(this << address);
 
    NS_ASSERT(m_peers.find(address) == m_peers.end());
 
    if (m_disableSchedulingIfNoDeviceConnected && !HasPeer())
    {
        NS_LOG_INFO("Start beam " << m_beamId);
        m_peers.insert(address);
        StartPeriodicTransmissions();
    }
    else
    {
        m_peers.insert(address);
    }
 
    return true;
}
 
bool
SatOrbiterUserMac::RemovePeer(Mac48Address address)
{
    NS_LOG_FUNCTION(this << address);
 
    NS_ASSERT(m_peers.find(address) != m_peers.end());
 
    m_peers.erase(address);
 
    if (m_disableSchedulingIfNoDeviceConnected && !HasPeer())
    {
        NS_LOG_INFO("Stop beam " << m_beamId);
        StopPeriodicTransmissions();
    }
 
    return true;
}
 
bool
SatOrbiterUserMac::HasPeer()
{
    NS_LOG_FUNCTION(this);
 
    return !m_peers.empty();
}
 
} // namespace ns3