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CsmaCaMac.cc
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CsmaCaMac.cc
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//
// Copyright (C) 2016 OpenSim Ltd.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, see <http://www.gnu.org/licenses/>.
//
#include "inet/common/ModuleAccess.h"
#include "inet/linklayer/common/Ieee802Ctrl.h"
#include "inet/linklayer/common/UserPriority.h"
#include "inet/linklayer/csmaca/CsmaCaMac.h"
#include "inet/networklayer/ipv4/IPv4.h"
namespace inet {
Define_Module(CsmaCaMac);
static long numFwdDownstreamInfoA[6]={0};
static long numFwdDownstreamInfoC[6]={0};
static long numRecInfo[4]={0};
static long numSentA[6]={0};
static long numSentC[6]={0};
static long numSentWithoutRetryC[6]={0};
static long numSentWithoutRetryA[6]={0};
//long numFwdDownstreamInfo=0;
static int getUPBasedFramePriority(cObject *obj)
{
auto frame = check_and_cast<CsmaCaMacDataFrame*>(obj);
int up = frame->getPriority();
return (up == UP_BK) ? -2 : (up == UP_BK2) ? -1 : up; // because UP_BE==0, but background traffic should have lower priority than best effort
}
static int compareFramesByPriority(cObject *a, cObject *b)
{
return getUPBasedFramePriority(b) - getUPBasedFramePriority(a);
}
//@Anjana
long* getUpdate()
{
for(int i=0;i<=3;i++)
EV<<"inside getUpdate. The value of numRecInfo is:"<<numRecInfo[i]<<endl;
return numRecInfo;
}
long* getUpdateA()
{
//long info=numFwdDownstreamInfo[nodeIndex];
for(int i=0;i<=5;i++)
EV<<"inside getUpdateA. The value of numFwdDownstreamInfoA is:"<<numFwdDownstreamInfoA[i]<<endl;
return numFwdDownstreamInfoA;
}
long* getUpdateC()
{
//long info=numFwdDownstreamInfo[nodeIndex];
for(int i=0;i<=5;i++)
EV<<"inside getUpdateC. The value of numFwdDownstreamInfoC is:"<<numFwdDownstreamInfoC[i]<<endl;
return numFwdDownstreamInfoC;
}
long* getUpdateSentA()
{
//long info=numFwdDownstreamInfo[nodeIndex];
for(int i=0;i<=5;i++)
EV<<"inside getUpdateSentA. The value of numSentA is:"<<numSentA[i]<<endl;
return numSentA;
}
long* getUpdateSentC()
{
//long info=numFwdDownstreamInfo[nodeIndex];
for(int i=0;i<=5;i++)
EV<<"inside getUpdateSentC. The value of numSentC is:"<<numSentC[i]<<endl;
return numSentC;
}
simsignal_t CsmaCaMac::drpPkChannelSignal = SIMSIGNAL_NULL;
CsmaCaMac::~CsmaCaMac()
{
cancelAndDelete(endSifs);
cancelAndDelete(endDifs);
cancelAndDelete(endBackoff);
cancelAndDelete(endAckTimeout);
cancelAndDelete(endData);
cancelAndDelete(mediumStateChange);
//@anjana
/*cancelAndDelete(endEvaluationTxr);
cancelAndDelete(endEvaluationRxr);*/
}
/****************************************************************
* Initialization functions.
*/
void CsmaCaMac::initialize(int stage)
{
MACProtocolBase::initialize(stage);
if (stage == INITSTAGE_LOCAL) {
EV << "Initializing stage 0\n";
maxQueueSize = par("maxQueueSize");
useAck = par("useAck");
bitrate = par("bitrate");
headerLength = par("headerLength");
ackLength = par("ackLength");
ackTimeout = par("ackTimeout");
slotTime = par("slotTime");
sifsTime = par("sifsTime");
difsTime = par("difsTime");
cwMin = par("cwMin");
cwMax = par("cwMax");
cwMulticast = par("cwMulticast");
retryLimit = par("retryLimit");
const char *addressString = par("address");
if (!strcmp(addressString, "auto")) {
// assign automatic address
address = MACAddress::generateAutoAddress();
// change module parameter from "auto" to concrete address
par("address").setStringValue(address.str().c_str());
}
else
address.setAddress(addressString);
registerInterface();
// subscribe for the information of the carrier sense
cModule *radioModule = getModuleFromPar<cModule>(par("radioModule"), this);
radioModule->subscribe(IRadio::receptionStateChangedSignal, this);
radioModule->subscribe(IRadio::transmissionStateChangedSignal, this);
radio = check_and_cast<IRadio *>(radioModule);
// initialize self messages
endSifs = new cMessage("SIFS");
endDifs = new cMessage("DIFS");
endBackoff = new cMessage("Backoff");
endAckTimeout = new cMessage("AckTimeout");
endData = new cMessage("Data");
mediumStateChange = new cMessage("MediumStateChange");
// set up internal queue
transmissionQueue.setMaxPacketLength(maxQueueSize);
transmissionQueue.setName("transmissionQueue");
if (par("prioritizeByUP"))
transmissionQueue.setup(&compareFramesByPriority);
// obtain pointer to external queue
initializeQueueModule();
// state variables
fsm.setName("CsmaCaMac State Machine");
backoffPeriod = -1;
retryCounter = 0;
// statistics
numRetry = 0;
numSentWithoutRetry = 0;
numGivenUp = 0;
numCollision = 0;
numSent = 0;
numReceived = 0;
numSentBroadcast = 0;
numReceivedBroadcast = 0;
//int numFwdDownstream=0;
//numFwdDownstreamA=0;
// numFwdDownstreamC=0;
//numFwdDownstreamInfo=0;
// initialize watches
WATCH(fsm);
WATCH(backoffPeriod);
WATCH(retryCounter);
WATCH(numRetry);
WATCH(numSentWithoutRetry);
WATCH(numGivenUp);
WATCH(numCollision);
WATCH(numSent);
WATCH(numReceived);
WATCH(numSentBroadcast);
WATCH(numReceivedBroadcast);
}
else if (stage == INITSTAGE_LINK_LAYER)
radio->setRadioMode(IRadio::RADIO_MODE_RECEIVER);
drpPkChannelSignal = registerSignal("drpPkChannel");
}
void CsmaCaMac::initializeQueueModule()
{
// use of external queue module is optional -- find it if there's one specified
if (par("queueModule").stringValue()[0]) {
cModule *module = getParentModule()->getSubmodule(par("queueModule").stringValue());
queueModule = check_and_cast<IPassiveQueue *>(module);
EV << "Requesting first two frames from queue module\n";
queueModule->requestPacket();
// needed for backoff: mandatory if next message is already present
queueModule->requestPacket();
}
}
void CsmaCaMac::finish()
{
recordScalar("numRetry", numRetry);
recordScalar("numSentWithoutRetry", numSentWithoutRetry);
recordScalar("numGivenUp", numGivenUp);
recordScalar("numCollision", numCollision);
recordScalar("numSent", numSent);
recordScalar("numReceived", numReceived);
recordScalar("numSentBroadcast", numSentBroadcast);
recordScalar("numReceivedBroadcast", numReceivedBroadcast);
recordScalar("numReceivedBroadcast", numReceivedBroadcast);
//recordScalar("numFwdDownstream", numFwdDownstream);
//recordScalar("numFwdDownstreamC", numFwdDownstreamC);
}
InterfaceEntry *CsmaCaMac::createInterfaceEntry()
{
InterfaceEntry *e = new InterfaceEntry(this);
// data rate
e->setDatarate(bitrate);
// generate a link-layer address to be used as interface token for IPv6
e->setMACAddress(address);
e->setInterfaceToken(address.formInterfaceIdentifier());
// capabilities
e->setMtu(par("mtu"));
e->setMulticast(true);
e->setBroadcast(true);
e->setPointToPoint(false);
return e;
}
/****************************************************************
* Message handling functions.
*/
void CsmaCaMac::handleSelfMessage(cMessage *msg)
{
EV << "received self message: " << msg << endl;
handleWithFsm(msg);
}
void CsmaCaMac::handleUpperPacket(cPacket *msg)
{
if (maxQueueSize != -1 && (int)transmissionQueue.getLength() == maxQueueSize) {
EV << "message " << msg << " received from higher layer but MAC queue is full, dropping message\n";
emit(LayeredProtocolBase::packetFromUpperDroppedSignal, msg);
delete msg;
return;
}
CsmaCaMacDataFrame *frame = encapsulate(msg);
if(frame->hasPar("origin"))
EV<<"Origin appended"<<frame->par("origin").longValue()<<endl;
EV << "frame " << frame << " received from higher layer, receiver = " << frame->getReceiverAddress() << endl;
ASSERT(!frame->getReceiverAddress().isUnspecified());
transmissionQueue.insert(frame);
if (fsm.getState() != IDLE)
EV << "deferring upper message transmission in " << fsm.getStateName() << " state\n";
else
handleWithFsm(frame);
}
void CsmaCaMac::handleLowerPacket(cPacket *msg)
{
EV << "received message from lower layer: " << msg << endl;
CsmaCaMacFrame *frame = check_and_cast<CsmaCaMacFrame *>(msg);
EV << "Self address: " << address
<< ", receiver address: " << frame->getReceiverAddress()
<< ", received frame is for us: " << isForUs(frame) << endl;
handleWithFsm(msg);
}
void CsmaCaMac::handleWithFsm(cMessage *msg)
{
CsmaCaMacFrame *frame = dynamic_cast<CsmaCaMacFrame*>(msg);
EV_DEBUG<<"Frame is"<<msg->getName()<<endl;
FSMA_Switch(fsm)
{
FSMA_State(IDLE)
{
FSMA_Event_Transition(Defer-Transmit,
isUpperMessage(msg) && !isMediumFree(),
DEFER,
);
FSMA_Event_Transition(Start-Backoff,
isUpperMessage(msg) && isMediumFree() && !useAck,
BACKOFF,
);
FSMA_Event_Transition(Start-Difs,
isUpperMessage(msg) && isMediumFree() && useAck,
WAITDIFS,
);
FSMA_Event_Transition(Start-Receive,
msg == mediumStateChange && isReceiving(),
RECEIVE,
);
}
FSMA_State(DEFER)
{
FSMA_Event_Transition(Start-Backoff,
msg == mediumStateChange && isMediumFree() && !useAck,
BACKOFF,
);
FSMA_Event_Transition(Start-Difs,
msg == mediumStateChange && isMediumFree() && useAck,
WAITDIFS,
);
FSMA_Event_Transition(Start-Receive,
msg == mediumStateChange && isReceiving(),
RECEIVE,
);
}
FSMA_State(WAITDIFS)
{
FSMA_Enter(scheduleDifsTimer());
FSMA_Event_Transition(Start-Backoff,
msg == endDifs,
BACKOFF,
);
FSMA_Event_Transition(Start-Receive,
msg == mediumStateChange && isReceiving(),
RECEIVE,
cancelDifsTimer();
);
FSMA_Event_Transition(Defer-Difs,
msg == mediumStateChange && !isMediumFree(),
DEFER,
cancelDifsTimer();
);
}
FSMA_State(BACKOFF)
{
FSMA_Enter(scheduleBackoffTimer());
FSMA_Event_Transition(Start-Transmit,
msg == endBackoff,
TRANSMIT,
invalidateBackoffPeriod();
);
FSMA_Event_Transition(Start-Receive,
msg == mediumStateChange && isReceiving(),
RECEIVE,
cancelBackoffTimer();
decreaseBackoffPeriod();
);
FSMA_Event_Transition(Defer-Backoff,
msg == mediumStateChange && !isMediumFree(),
DEFER,
cancelBackoffTimer();
decreaseBackoffPeriod();
);
}
FSMA_State(TRANSMIT)
{
//if (getCurrentTransmission()->getTransmitterAddress() != nullptr)
//{
/*MACAddress& sender=getCurrentTransmission()->getTransmitterAddress();
EV_INFO<<"MACAddress of sender:"<<sender<<endl;*/
//}
FSMA_Enter(sendDataFrame(getCurrentTransmission()));
FSMA_Event_Transition(Transmit-Broadcast,
msg == endData && isBroadcast(getCurrentTransmission()),
IDLE,
finishCurrentTransmission();
numSentBroadcast++;
);
FSMA_Event_Transition(Transmit-Unicast-No-Ack,
msg == endData && !useAck && !isBroadcast(getCurrentTransmission()),
IDLE,
//@Anjana
/* if(!endEvaluationTxr->isScheduled())
scheduleUpdateRecTimeout(getCurrentTransmission());*/
finishCurrentTransmission();
numSent++;
);
FSMA_Event_Transition(Transmit-Unicast-Use-Ack,
msg == endData && useAck && !isBroadcast(getCurrentTransmission()),
WAITACK,
//if (getCurrentTransmission()->hasPar("origin"))
//{
EV<<"Frame name-2 is"<<getCurrentTransmission()->getName()<<endl;
EV<<"inside txn"<<endl;
MACAddress& currentNode=getCurrentTransmission()->getTransmitterAddress();
orgId=getCurrentTransmission()->par("origin").longValue();
if(orgId<5)
{
if(currentNode==MACAddress("0A-AA-00-00-00-01"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[0]++;
numSentA[0]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[0]++;
numSentC[0]++;
}
}
else if(currentNode==MACAddress("0A-AA-00-00-00-03"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[1]++;
numSentA[1]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[1]++;
numSentC[1]++;
}
}
else if(currentNode==MACAddress("0A-AA-00-00-00-04"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[2]++;
numSentA[2]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[2]++;
numSentC[2]++;
}
}
else if(currentNode==MACAddress("0A-AA-00-00-00-05"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[3]++;
numSentA[3]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[3]++;
numSentC[3]++;
}
}
else if(currentNode==MACAddress("0A-AA-00-00-00-06"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[4]++;
numSentA[4]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[4]++;
numSentC[4]++;
}
}
else if(currentNode==MACAddress("0A-AA-00-00-00-07"))
{
if(orgId==0)
{
if (retryCounter == 0) numSentWithoutRetryA[5]++;
numSentA[5]++;
}
else if (orgId==1)
{
if (retryCounter == 0) numSentWithoutRetryC[5]++;
numSentC[5]++;
}
}
// }
}
if (retryCounter == 0) numSentWithoutRetry++;
numSent++;
);
}
FSMA_State(WAITACK)
{
FSMA_Enter(scheduleAckTimeout(getCurrentTransmission()));
FSMA_Event_Transition(Receive-Ack,
isLowerMessage(msg) && isForUs(frame) && isAck(frame),
IDLE,
// if (retryCounter == 0) numSentWithoutRetry++;
//numSent++;
//@Anjana
if(frame->hasPar("nFD"))
{
EV_INFO<<"inside waitack: retrieving info\n";
int index= frame->findPar("nFD");
cArray& c=frame->getParList();
EV_INFO<<"parlist"<<c[0]<<endl;
//cArray& parlist = getParList();
cObject *p = c.get(index);
void *ptrinfo;
if (!p)
EV_WARN<<"par(int): Has no parameter #%d" <<index<<endl;
else
ptrinfo=frame->par(index).pointerValue();
int a[2]={0};
int *b=(int*)(ptrinfo);
a[0]=*(b+0);
a[1]=*(b+1);
MACAddress dest=frame->getReceiverAddress();
EV_INFO<<"MACAddress:"<<dest.str()<<endl;
if(dest==MACAddress("0A-AA-00-00-00-01"))
{
numFwdDownstreamInfoA[0]=a[0];
//long chk1=ptrinfo;
//long chk2=*ptrinfo;
//long chk3=&(ptrinfo);
//long chk4=&(ptrinfo+8);
EV_INFO<<"numFwdDownstreamInfo of A:"<<numFwdDownstreamInfoA[0]<<endl;
}
else if(dest==MACAddress("0A-AA-00-00-00-03"))
{
numFwdDownstreamInfoC[1]=a[1];
EV_INFO<<"numFwdDownstreamInfo of C:"<<numFwdDownstreamInfoC[1]<<endl;
}
else if(dest==MACAddress("0A-AA-00-00-00-04"))
{
//for numreceived info
numRecInfo[0]=numReceived;
numFwdDownstreamInfoA[2]=a[0];
numFwdDownstreamInfoC[2]=a[1];
EV_INFO<<"numFwdDownstreamInfo of R1:"<<numFwdDownstreamInfoA[2]<<"and"<<numFwdDownstreamInfoC[2]<<endl;
}
else if(dest==MACAddress("0A-AA-00-00-00-05"))
{
//for numreceived info
numRecInfo[1]=numReceived;
numFwdDownstreamInfoA[3]=a[0];
numFwdDownstreamInfoC[3]=a[1];
EV_INFO<<"numFwdDownstreamInfo of R2:"<<numFwdDownstreamInfoA[3]<<"and"<<numFwdDownstreamInfoC[3]<<endl;
}
else if(dest==MACAddress("0A-AA-00-00-00-06"))
{
//for numreceived info
numRecInfo[2]=numReceived;
numFwdDownstreamInfoA[4]=a[0];
numFwdDownstreamInfoC[4]=a[1];
EV_INFO<<"numFwdDownstreamInfo of R3:"<<numFwdDownstreamInfoA[4]<<"and"<<numFwdDownstreamInfoC[4]<<endl;
}
else if(dest==MACAddress("0A-AA-00-00-00-07"))
{
//for numreceived info
numRecInfo[3]=numReceived;
numFwdDownstreamInfoA[5]=a[0];
numFwdDownstreamInfoC[5]=a[1];
EV_INFO<<"numFwdDownstreamInfo of R4:"<<numFwdDownstreamInfoA[5]<<"and"<<numFwdDownstreamInfoC[5]<<endl;
}
else
EV_WARN<<"wrong MAC address"<<dest<<endl;
// end of value retrieval from netwrk layer*/
}
cancelAckTimer();
finishCurrentTransmission();
delete frame;
);
FSMA_Event_Transition(Give-Up-Transmission,
msg == endAckTimeout && retryCounter == retryLimit,
IDLE,
//numBreak++;
giveUpCurrentTransmission();
);
FSMA_Event_Transition(Retry-Transmission,
msg == endAckTimeout,
IDLE,
retryCurrentTransmission();
//giveUpCurrentTransmission();
);
}
FSMA_State(RECEIVE)
{
FSMA_Event_Transition(Receive-Bit-Error,
isLowerMessage(msg) && frame->hasBitError(),
IDLE,
// TODO: reason? emit(LayeredProtocolBase::packetFromLowerDroppedSignal, frame);
delete frame;
numCollision++;
resetStateVariables();
);
FSMA_Event_Transition(Receive-Unexpected-Ack,
isLowerMessage(msg) && isAck(frame),
IDLE,
delete frame;
resetStateVariables();
);
FSMA_Event_Transition(Receive-Broadcast,
isLowerMessage(msg) && isBroadcast(frame),
IDLE,
sendUp(decapsulate(check_and_cast<CsmaCaMacDataFrame *>(frame)));
numReceivedBroadcast++;
resetStateVariables();
);
FSMA_Event_Transition(Receive-Unicast-No-Ack,
isLowerMessage(msg) && isForUs(frame) && !useAck,
IDLE,
sendUp(decapsulate(check_and_cast<CsmaCaMacDataFrame *>(frame)));
numReceived++;
//@Anjana
/*if (!endEvaluationRxr->isScheduled())
scheduleUpdateSendTimer(frame);*/
resetStateVariables();
);
FSMA_Event_Transition(Receive-Unicast-Use-Ack,
isLowerMessage(msg) && isForUs(frame) && useAck,
WAITSIFS,
if((1.0 - channelDropProbability) <= dblrand())
{
emit(drpPkChannelSignal, frame);
EV << "Packet Dropped-channel\n";
delete frame;
delete msg; // keeps OMNeT++ happy
return;
}
else
{
sendUp(decapsulate(check_and_cast<CsmaCaMacDataFrame *>(frame->dup())));
numReceived++;
}
);
FSMA_Event_Transition(Receive-Unicast-Not-For-Us,
isLowerMessage(msg) && !isForUs(frame),
IDLE,
delete frame;
resetStateVariables();
);
}
FSMA_State(WAITSIFS)
{
FSMA_Enter(scheduleSifsTimer(frame));
FSMA_Event_Transition(Transmit-Ack,
msg == endSifs,
IDLE,
sendAckFrame();
resetStateVariables();
);
}
}
if (fsm.getState() == IDLE) {
if (isReceiving())
handleWithFsm(mediumStateChange);
else if (!transmissionQueue.isEmpty())
handleWithFsm(transmissionQueue.front());
}
}
void CsmaCaMac::receiveSignal(cComponent *source, simsignal_t signalID, long value, cObject *details)
{
Enter_Method_Silent();
if (signalID == IRadio::receptionStateChangedSignal)
handleWithFsm(mediumStateChange);
else if (signalID == IRadio::transmissionStateChangedSignal) {
IRadio::TransmissionState newRadioTransmissionState = (IRadio::TransmissionState)value;
if (transmissionState == IRadio::TRANSMISSION_STATE_TRANSMITTING && newRadioTransmissionState == IRadio::TRANSMISSION_STATE_IDLE) {
handleWithFsm(endData);
radio->setRadioMode(IRadio::RADIO_MODE_RECEIVER);
}
transmissionState = newRadioTransmissionState;
}
}
CsmaCaMacDataFrame *CsmaCaMac::encapsulate(cPacket *msg)
{
CsmaCaMacDataFrame *frame = new CsmaCaMacDataFrame(msg->getName());
frame->setByteLength(headerLength);
// TODO: kludge to make isUpperMessage work
frame->setArrival(msg->getArrivalModuleId(), msg->getArrivalGateId());
EV_INFO<<"Inside Encapsulate.source addr is:"<<check_and_cast<IPv4Datagram *>(msg)->getSourceAddress()<<endl;
Ieee802Ctrl *ctrl = check_and_cast<Ieee802Ctrl *>(msg->removeControlInfo());
frame->setTransmitterAddress(address);
frame->setReceiverAddress(ctrl->getDest());
//ctrl->getSrc();
int up = ctrl->getUserPriority();
frame->setPriority(up == -1 ? UP_BE : up); // -1 is unset
//@Anjana
L3Address src=check_and_cast<IPv4Datagram *>(msg)->getSourceAddress();
long origin=5;
if (src == IPv4Address("10.0.0.3"))
origin=1;
else if (src ==IPv4Address("10.0.0.1"))
origin=0;
//end addition
delete ctrl;
frame->encapsulate(msg);
//@Anjana
frame->addPar("origin");
frame->par("origin").setLongValue(origin);
//end addn
return frame;
}
cPacket *CsmaCaMac::decapsulate(CsmaCaMacDataFrame *frame)
{
cPacket *payload = frame->decapsulate();
Ieee802Ctrl *ctrl = new Ieee802Ctrl();
ctrl->setSrc(frame->getTransmitterAddress());
ctrl->setDest(frame->getReceiverAddress());
ctrl->setUserPriority(frame->getPriority());
payload->setControlInfo(ctrl);
delete frame;
return payload;
}
//@Anjana
/*cPacket *CsmaCaMac::decapsulate_ack(CsmaCaMacAckFrame *frame)
{
cPacket *payload = frame->decapsulate();
Ieee802Ctrl *ctrl = new Ieee802Ctrl();
ctrl->setSrc(frame->getTransmitterAddress());
ctrl->setDest(frame->getReceiverAddress());
frame->
// ctrl->setUserPriority(frame->getPriority());
//payload->setControlInfo(ctrl);
delete frame;
return payload;
}*/
/****************************************************************
* Timer functions.
*/
void CsmaCaMac::scheduleSifsTimer(CsmaCaMacFrame *frame)
{
EV << "scheduling SIFS timer\n";
endSifs->setContextPointer(frame);
scheduleAt(simTime() + sifsTime, endSifs);
}
void CsmaCaMac::scheduleDifsTimer()
{
EV << "scheduling DIFS timer\n";
scheduleAt(simTime() + difsTime, endDifs);
}
void CsmaCaMac::cancelDifsTimer()
{
EV << "canceling DIFS timer\n";
cancelEvent(endDifs);
}
void CsmaCaMac::scheduleAckTimeout(CsmaCaMacDataFrame *frameToSend)
{
EV << "scheduling ACK timeout\n";
scheduleAt(simTime() + ackTimeout, endAckTimeout);
}
void CsmaCaMac::cancelAckTimer()
{
EV << "canceling ACK timer\n";
cancelEvent(endAckTimeout);
}
//@Anjana
void CsmaCaMac::scheduleUpdateSendTimer(CsmaCaMacFrame *frame)
{
EV << "scheduling Update sending timer\n";
endEvaluationRxr->setContextPointer(frame);
scheduleAt(simTime() + updateTime, endEvaluationRxr);
}
void CsmaCaMac::scheduleUpdateRecTimeout(CsmaCaMacDataFrame *frameToSend)
{
EV << "scheduling update receive timeout\n";
scheduleAt(simTime() + updateTime, endEvaluationTxr);
}
void CsmaCaMac::cancelUpdateRecTimer()
{
EV << "canceling Update timer\n";
cancelEvent(endEvaluationTxr);
}
void CsmaCaMac::invalidateBackoffPeriod()
{
backoffPeriod = -1;
}
bool CsmaCaMac::isInvalidBackoffPeriod()
{
return backoffPeriod == -1;
}
void CsmaCaMac::generateBackoffPeriod()
{
ASSERT(0 <= retryCounter && retryCounter <= retryLimit);
EV << "generating backoff slot number for retry: " << retryCounter << endl;
int cw;
if (getCurrentTransmission()->getReceiverAddress().isMulticast())
cw = cwMulticast;
else
cw = std::min(cwMax, (cwMin + 1) * (1 << retryCounter) - 1);
int slots = intrand(cw + 1);
EV << "generated backoff slot number: " << slots << " , cw: " << cw << endl;
backoffPeriod = slots * slotTime;
ASSERT(backoffPeriod >= 0);
EV << "backoff period set to " << backoffPeriod << endl;
}
void CsmaCaMac::decreaseBackoffPeriod()
{
simtime_t elapsedBackoffTime = simTime() - endBackoff->getSendingTime();
backoffPeriod -= ((int)(elapsedBackoffTime / slotTime)) * slotTime;
ASSERT(backoffPeriod >= 0);
EV << "backoff period decreased to " << backoffPeriod << endl;
}
void CsmaCaMac::scheduleBackoffTimer()
{
EV << "scheduling backoff timer\n";
if (isInvalidBackoffPeriod())
generateBackoffPeriod();
scheduleAt(simTime() + backoffPeriod, endBackoff);
}
void CsmaCaMac::cancelBackoffTimer()
{
EV << "canceling backoff timer\n";
cancelEvent(endBackoff);
}
/****************************************************************
* Frame sender functions.
*/
void CsmaCaMac::sendDataFrame(CsmaCaMacDataFrame *frameToSend)
{
EV << "sending Data frame " << frameToSend->getName() << endl;
radio->setRadioMode(IRadio::RADIO_MODE_TRANSMITTER);
sendDown(frameToSend->dup());
}
void CsmaCaMac::sendAckFrame()
{
EV << "sending Ack frame\n";
auto frameToAck = static_cast<CsmaCaMacDataFrame *>(endSifs->getContextPointer());
endSifs->setContextPointer(nullptr);
auto ackFrame = new CsmaCaMacAckFrame("CsmaAck");
ackFrame->setReceiverAddress(frameToAck->getTransmitterAddress());
ackFrame->setByteLength(ackLength);
int nodeIndex;
//@Anjana
MACAddress currentNode=frameToAck->getReceiverAddress();
EV_INFO<<"MACAddress current node:"<<currentNode.str()<<endl;
if(currentNode==MACAddress("0A-AA-00-00-00-01"))
{
nodeIndex=0;
}
else if (currentNode==MACAddress("0A-AA-00-00-00-03"))
{
nodeIndex=1;
}
else if(currentNode==MACAddress("0A-AA-00-00-00-04"))
{
nodeIndex=2;
}
else if (currentNode==MACAddress("0A-AA-00-00-00-05"))
{
nodeIndex=3;
}
else if (currentNode==MACAddress("0A-AA-00-00-00-06"))
{
nodeIndex=4;
}
else if (currentNode==MACAddress("0A-AA-00-00-00-07"))
{
nodeIndex=5;
}
else
{
EV_INFO<<"wrong mac id"<<currentNode;
nodeIndex=6;
}
if(nodeIndex<=5)
{
/*long *ptrA=inet::getUpdateAfromIP();
numSentInfo[0]=ptrA[nodeIndex];
long *ptrC=inet::getUpdateCfromIP();
numSentInfo[1]=ptrC[nodeIndex];*/
numSentInfo[0]=numSentA[nodeIndex];
numSentInfo[1]=numSentC[nodeIndex];
void* numSentInfoPtr=numSentInfo;
/*ackFrame->addPar("numFwdDownstreamC");
ackFrame->par("numFwdDownstreamC").setLongValue(numSentC);*/
// int nFD;
ackFrame->addPar("nFD");
int index=ackFrame->findPar("nFD");
ackFrame->par(index).setPointerValue(numSentInfoPtr);
EV_INFO<<"numsentA"<<numSentInfo[0]<<endl;
EV_INFO<<"numsentC"<<numSentInfo[1]<<endl;
// EV_INFO<<"ackframe.numFwdDownstreamC"<<ackFrame->par(numFwdDownstreamC).longValue()<<endl;
// EV_INFO<<"ackframe.numFwdDownstreamA"<<ackFrame->par(numFwdDownstreamA).longValue()<<endl;
//end adds
}
radio->setRadioMode(IRadio::RADIO_MODE_TRANSMITTER);
sendDown(ackFrame);
delete frameToAck;
}
//@Anjana
/*void CsmaCaMac::sendUpdateFrame()
{
EV << "sending update frame\n";
auto frameToUpdate = static_cast<CsmaCaMacDataFrame *>(endEvaluationRxr->getContextPointer());
endEvaluationRxr->setContextPointer(nullptr);
auto updateFrame = new CsmaCaMacAckFrame("updateFrame");
updateFrame->setReceiverAddress(frameToUpdate->getTransmitterAddress());
updateFrame->setByteLength(ackLength);
//@Anjana
updateFrame->addPar("numSentDownstream");
updateFrame->par("numSentDownstream").setLongValue(numSent);
//end adds
radio->setRadioMode(IRadio::RADIO_MODE_TRANSMITTER);
sendDown(updateFrame);
delete frameToUpdate;
}*/
/****************************************************************
* Helper functions.
*/
void CsmaCaMac::finishCurrentTransmission()
{
popTransmissionQueue();
resetStateVariables();
}
void CsmaCaMac::giveUpCurrentTransmission()
{
/*if(numBreak>1)
{*/
// emit(NF_LINK_BREAK, getCurrentTransmission());
/* numBreak=0;
}*/