Omnet++：如何在inet中发送到多个主机

Question

如果我想让一个主机发送给多个主机但不是全部。

**.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"

我正在尝试通过如下编辑应用程序模块来解决问题

代码是

//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;
}

我所做的更改如下

//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 multiaddress 为 false 则它工作正常，但如果它为 true 但也没有错误，则它不起作用。就好像它被一个空地址覆盖一样。

“我很抱歉代码太长，但我害怕错过可能与我正在做的事情有关的功能，我没有注意到”

Answer 1

您在destAddresses 中使用逗号作为分隔符，而在cStringTokenizer 中空格（即空格、制表符、CR、LF）是默认分隔符。 因此，您应该通过更改行来通知 cStringTokenizer 的解析器逗号是分隔符：

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

进入：

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

v 的声明已被省略，因为您可能打算在您的类中使用 v（在 C++ 中，任何局部变量都将覆盖类中同名的变量）。