RelayInterface*: Replaced default vlan ID 0 with -1 to distinguish between the no vlan ID and vlan ID 0 cases.

Author: levy

src/inet/linklayer/ethernet/common/RelayInterfaceLearner.cc

@@ -37,7 +37,7 @@ cGate *RelayInterfaceLearner::getRegistrationForwardingGate(cGate *gate)
 
 void RelayInterfaceLearner::processPacket(Packet *packet)
 {
-    unsigned int vid = 0;
+    int vid = -1;
     if (auto vlanInd = packet->findTag<VlanInd>())
         vid = vlanInd->getVlanId();
     auto incomingInterface = interfaceTable->getInterfaceById(packet->getTag<InterfaceInd>()->getInterfaceId());

src/inet/linklayer/ethernet/common/RelayInterfaceSelector.cc

@@ -53,7 +53,7 @@ void RelayInterfaceSelector::pushPacket(Packet *packet, const cGate *gates)
         auto interfaceInd = packet->findTag<InterfaceInd>();
         auto incomingInterface = interfaceInd != nullptr ? interfaceTable->getInterfaceById(interfaceInd->getInterfaceId()) : nullptr;
         auto vlanReq = packet->findTag<VlanReq>();
-        int vlanId = vlanReq != nullptr ? vlanReq->getVlanId() : 0;
+        int vlanId = vlanReq != nullptr ? vlanReq->getVlanId() : -1;
         if (destinationAddress.isBroadcast())
             broadcastPacket(packet, destinationAddress, incomingInterface);
         else if (destinationAddress.isMulticast()) {