QOS OMNET++

Sample code for QoS in network:
void ErrorHandling::handleMessage(cMessage *msg)
{
numReceived++;

IPv4Datagram *d = check_and_cast(QosMsg->getEncapsulatedPacket());

EV << “Error Handler: QOS message received:\n”;
EV << ” Type: ” << (int)QosMsg->getType()
<< ” Code: ” << (int)QosMsg->getCode()
<< ” Bytelength: ” << d->getByteLength()
<< ” Src: ” << d->getSrcAddress()
<< ” Dest: ” << d->getDestAddress()
<< ” Time: ” << simTime()
<< “\n”; switch (QosMsg->getType())
{
case QOS_DESTINATION_UNREACHABLE:
numHostUnreachable++;
break;

case QOS_TIME_EXCEEDED:
numTimeExceeded++;
break;
}

delete QosMsg;

if (ev.isGUI())
{
char buf[80];
sprintf(buf, “errors: %ld”, numReceived);
getDisplayString().setTagArg(“t”, 0, buf);
}
bool QOS::possiblyLocalBroadcast(const IPv4Address& addr, int interfaceId)
{
if ((addr.getInt()&1) == 0)
return false;

IRoutingTable *rt = RoutingTableAccess().get();
if (rt->isLocalBroadcastAddress(addr))
return true;
IInterfaceTable *ift = InterfaceTableAccess().get();
if (interfaceId != -1)
{
InterfaceEntry *ie = ift->getInterfaceById(interfaceId);
bool interfaceUnconfigured = (ie->ipv4Data() == NULL) || ie->ipv4Data()->getIPAddress().isUnspecified();
return interfaceUnconfigured;
}
else
{
//
bool allInterfacesConfigured = true;
for (int i = 0; i < (int)ift->getNumInterfaces(); i++)
if ((ift->getInterface(i)->ipv4Data() == NULL) || ift->getInterface(i)->ipv4Data()->getIPAddress().isUnspecified())
allInterfacesConfigured = false;
return !allInterfacesConfigured;
}
}