MAC 地址值无法被其他节点消息识别

Question

我正在使用 Veins 5.0。这是我写的代码：

NodeMsg.msg

cplusplus{{
    #import "veins/base/utils/Coord.h"
    #import "veins/modules/utility/Consts80211p.h"
    #include "veins/modules/messages/BaseFrame1609_4_m.h"
    #include "veins/base/utils/SimpleAddress.h"
}};

namespace veins;

class noncobject Coord;
class BaseFrame1609_4;
class noncobject LAddress::L2Type;

packet mR_SA extends BaseFrame1609_4
{
    int isWlan; // IEEE 80211p and LTE classification variables
    int mrsuId;
    int type;
    int status;
    int remainingCapacity;
    int neighborVehiclesCount;
    int checksum; 
    double direction;
    double velocity;
    double posX; // longitude
    double posY; // latitude
    simtime_t timestamp = 0;
    LAddress::L2Type macId; // MAC address
}

Node.h

#include "veins/modules/mac/ieee80211p/DemoBaseApplLayerToMac1609_4Interface.h"
...

class VEINS_API Node : public DemoBaseApplLayer
{
     ...
     public:
         LAddress::L2Type nodeMacId = 0;
}

Node.cc

...
else if(stage == 1)
{
     mac = FindModule<DemoBaseApplLayerToMac1609_4Interface*>::findSubModule(getParentModule());
     ASSERT(mac);

     nodeMacId = mac -> getMACAddress();
}

...

void Node::handleSelfMsg(cMessage* msg)
{
     ... 
     mR_SA* mr_sa = new mR_SA();
     ...
     mr_sa -> setMacId(nodeMacId);

     BaseFrame1609_4* wsm = new BaseFrame1609_4();
     wsm -> encapsulate(mr_sa);
     populateWSM(wsm);
     sendDelayedDown(wsm, uniform(0.01, 0.50));
}

另一个Node.cc

...
mR_SA* mr_sa = new mR_SA();
LAddress::L2Type nodeMacId = mr_sa -> getMacId();

EV_TRACE << "MAC address: " << nodeMacId << std::endl;
...

日志显示为从Node获取的MAC地址值为326。但是，另一个节点从消息中收到的MAC地址值为0。为什么会这样？

构建后运行当前代码模拟形式完全没有错误。我怀疑是不同类型的原因，所以我转换为 long 类型，但结果是一样的。

Answer 1

AnotherNode.cc 正在使用 new 创建新的 mR_SA，但希望在其中找到发送节点的 mac 地址。这是行不通的。相反，您需要将收到的 cMessage 转换为这种类型并使用成员访问器来获取 mac 地址。

MAC 地址值无法被其他节点消息识别

The MAC address value isn't recognized by other node messages

omnet++

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