c++ - 将结构与消息一起发送，累积消息并重新发送给 Veins 中的邻居

Question

我想从所有邻居节点连同消息一起累积一种信任值(比如 'theta='，介于 0.5 到 1 之间)，然后将累积的消息和信任值发送到其他节点。还需要以 .txt 文件或 cvs 格式制作这些值的日志文件。 结构可能是这样的:

struct knownVehicle {
               int id;
               std::string vType;
               double theta=0.5;
               simtime_t lastSeenAt;
                      };

void TraCITestApp::onData(EWaveShortMessage* wsm) {
findHost()->getDisplayString().updateWith("r=16,green");
annotations->scheduleErase(1, annotations->drawLine(wsm->getSenderPos(), mobility->getPositionAt(simTime()), "blue"));
   if (mobility->getRoadId()[0] != ':') traciVehicle->changeRoute("-39539626", 9999);
      if (sentMessage){

    //Added for Knownvehicle receiving
          knownVehicle &recveh = wsm->getKnownVeh();
              double rectheta = recveh.theta;
              // process other fields of recveh
              delete &recveh; // remember to remove dynamically created object

          // check if new warning
         bool isNewWarning = true;
         for (map<long,WaveShortMessages>::iterator i = receivedWarningMessageMap.begin(); i != receivedWarningMessageMap.end(); ++i) {
           WaveShortMessage* msg = i->second[0];
           if (msg->getTreeId() == wsm->getTreeId())
               isNewWarning = false;
         }
         // add warning message to received messages storage
           receivedWarningMessageMap[wsm->getTreeId()].push_back(wsm->dup());
           std::ofstream logFile;
           logFile.open("log.txt", std::ios_base::app); // if exist it will be overwritten if added "std::ios_base::app" Appends
           std::stringstream ss;
           std::cout<<"MyID="<<getMyID()<<";"<< "Sender Id="<< wsm->getSenderAddress()<<endl;
          std::cout << "Accumulated receivedWarningMessageMap="<<wsm->dup() << std::endl;
          logFile <<"MyID="<<getMyID()<< "Sender Id="<< wsm->getSenderAddress()<<endl;

           for (auto it = receivedWarningMessageMap.begin(); it != receivedWarningMessageMap.end(); ++it) {
               ss << "id=" << static_cast<int>(it->first) << "; wsms Contents=";
               for (auto it2 : it->second) {
                   ss << it2 << "; ";
                      }
               }
               ss << endl;

 std::cout<<"MyID="<<getMyID()<<";"<< "Sender Id="<< wsm->getSenderAddress()<<endl;
           std::cout << "Accumulated receivedWarningMessageMap="<<wsm->dup() << std::endl;
           logFile <<"MyID="<<getMyID()<< "Sender Id="<< wsm->getSenderAddress()<<endl;
           logFile << "====Accumulated receivedWarningMessageMap (wsm->dup())=>"<<wsm->dup() <<"====\n"<< std::endl;
           logFile << ss.str();
           logFile <<"======================\n" <<endl;
         //  logFile.close();


 void TraCITestApp::sendMessage1(double theta)
{
        sentMessage = true;
t_channel channel = dataOnSch ? type_SCH : type_CCH;
EWaveShortMessage* wsm = prepareWSM("data", dataLengthBits, channel,  dataPriority, -1,2);
knownVehicle * veh = new knownVehicle();
veh->theta = 0.5;

// set other fields...
WaveShortMessage * packet = new WaveShortMessage();

packet->setKnownVeh(*veh);  // I got error here ...

// and now packet is ready to send, using send() OMNeT++ method
 sendWSM(wsm);
}

Answer 1

为了使用 WaveShortMessage 发送 knownVehicle 实例，对 WaveShortMessage.msg 进行以下修改:

// file: /veins/src/veins/modules/messages/WaveShortMessage.msg
cplusplus {{
#include "veins/base/utils/Coord.h"
struct knownVehicle {
  int id;
  std::string vType;
  double theta;
  simtime_t lastSeenAt;
};
}}

class noncobject knownVehicle;
class noncobject Coord;

packet WaveShortMessage {
//Version of the Wave Short Message
int wsmVersion = 0;
// ...
knownVehicle knownVeh;
}

当你想发送带有 knownVehicle 对象的 WaveShortMessage 时，使用下面的代码:

// add include:
// #include "WaveShortMessage_m.h"

knownVehicle * veh = new knownVehicle();
veh->theta = 0.5;
veh->id = 15;
// set other fields...
WaveShortMessage * packet = new WaveShortMessage();
packet->setKnownVeh(*veh);
// and now packet is ready to send, using send() OMNeT++ method

接收 WaveShortMessage:

void TraCIDemo11p::onData(WaveShortMessage* wsm) {
    knownVehicle & recveh = wsm->getKnownVeh();
    double rectheta = recveh.theta;
    // process other fields of recveh 
    delete &recveh; // remember to remove dynamically created object

    // existing code of this method
    findHost()->getDisplayString().updateWith("r=16,green");
    // ...
}