Omnet++：如何发送到 inet 中的多个主机

Question

如果我想让一个主机发送给多个主机而不是所有主机怎么办？

**.Host1.app1.destAddress = "6e:27:f5:71:ab:11"  
**.Host1.app2.destAddress = "6e:27:f5:71:ac:12"  
**.Host1.app3.destAddress = "6e:27:f5:71:ad:13"

我正在尝试按照以下方式编辑应用程序模块

密码是

//omnetpp.ini    
**.Host1.app.destAddress = "6e:27:f5:71:ab:11"

void EtherTrafGen::handleMessage(cMessage *msg)
{
if (!isNodeUp())
        throw cRuntimeError("Application is not running");
    if (msg->isSelfMessage())
    {
       if (msg->getKind() == START)
         {
            destMACAddress = resolveDestMACAddress();
            if (destMACAddress.isUnspecified())
            return;
          }
        sendBurstPackets();
        scheduleNextPacket(simTime());
        }
    }
    else
        receivePacket(check_and_cast<cPacket *>(msg));
    }
}

MACAddress EtherTrafGen::resolveDestMACAddress()
{
    MACAddress destMACAddress;
    destAddress = par("destAddress");
    if (destAddress[0]) {
        if (!destMACAddress.tryParse(destAddress)) {
            cModule *destStation = getModuleByPath(destAddress);
            if (!destStation)
                throw cRuntimeError("...");
            cModule *destMAC = destStation->getSubmodule("mac");
            if (!destMAC)
                throw cRuntimeError("...", destAddress);
            destMACAddress.setAddress(destMAC->par("address"));
        }
    }
    return destMACAddress;
}

我做了如下改动

//omnetpp.ini
**.Host1.app.destAddresses = "6e:27:f5:71:ab:11,6e:27:f5:71:ac:12,6e:27:f5:71:ad:13"

class INET_API EtherTrafGen : public cSimpleModule, public ILifecycle
{
  public:
    const char *destAddress;
    bool multipacket;
    std::vector<std::string> v;
    unsigned int x;
}

void EtherTrafGen::handleMessage(cMessage *msg)
{
    multipacket = true;
    if (!isNodeUp())
        throw cRuntimeError("Application is not running");
    if (msg->isSelfMessage())
    {
        const char *destAddresses = par("destAddresses");
        if(multipacket)
        {
            std::vector<std::string> v = cStringTokenizer(destAddresses).asVector();
            for (x = 0; x <= v.size(); x++)
            {
                if (msg->getKind() == START)
                        {
                            destMACAddress = resolveDestMACAddress();
                            // if no dest address given, nothing to do
                            if (destMACAddress.isUnspecified())
                                return;
                        }
                        sendBurstPackets();
                        scheduleNextPacket(simTime());
            }
        }

        else if(!(multipacket))
        {
            if (msg->getKind() == START)
                    {
                        destMACAddress = resolveDestMACAddress();
                        // if no dest address given, nothing to do
                        if (destMACAddress.isUnspecified())
                            return;
                    }
                    sendBurstPackets();
                    scheduleNextPacket(simTime());
        }
    }
    else
        receivePacket(check_and_cast<cPacket *>(msg));
}

MACAddress EtherTrafGen::resolveDestMACAddress()
{
    MACAddress destMACAddress;

    if (multipacket)
    {destAddress = v[x].c_str();}
    else if (!multipacket)
    { destAddress = par("destAddress");}

    if (destAddress[0]) {
        if (!destMACAddress.tryParse(destAddress)) {
            cModule *destStation = getModuleByPath(destAddress);
            if (!destStation)
                throw cRuntimeError("...");

            cModule *destMAC = destStation->getSubmodule("mac");
            if (!destMAC)
                throw cRuntimeError("...", destAddress);
            destMACAddress.setAddress(destMAC->par("address"));
        }
    }
    return destMACAddress;
}

结果是，如果 bool 多地址为 false，它工作正常，但如果它为 true，则不起作用，但也没有错误。好像它被一个空地址覆盖了。

"I am so sorry for the long code, but I am afraid to miss function that might be related to what I am doing and I am not noticing"

Answer 1

您在 destAddresses 中使用逗号作为分隔符，而 [=13] 中的默认分隔符是白色 space（即 space、制表符、CR、LF） =]. 因此，您应该从 cStringTokenizer 通知解析器逗号是分隔符，方法是更改行：

std::vector<std::string> v = cStringTokenizer(destAddresses).asVector();

进入：

v = cStringTokenizer(destAddresses, ",").asVector();

v 的声明已被省略，因为您可能打算使用 class 中的 v（在 C++ 中，任何局部变量都将覆盖 class).

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