Question

我正在使用lena-simple-epc.cc作为示例代码，并且试图用特定的自定义应用程序替换默认应用程序。我的最终目标是将单个数据包从一个Ue传输到另一个Ue。我删除了代码中包含PacketSinkHelper和UDPClientHelp的部分，并将其替换为：

   for (uint32_t n = 0; n < ueNodes.GetN(); n++)
{
    Ptr<ns3::Socket> srcSkt = Socket::CreateSocket(ueNodes.Get(n), TypeId::LookupByName ("ns3::UdpSocketFactory"));
    InetSocketAddress local = InetSocketAddress (Ipv4Address::GetAny (), 20000);
    srcSkt->Bind (local);
    srcSkt->SetRecvCallback (MakeCallback (&ReceivePacket));
}
uint16_t sinkPort = 20000;
Address sinkAddress (InetSocketAddress (ueIpIface.GetAddress (1), sinkPort));
Ptr<Socket> ns3UdpSocket = Socket::CreateSocket (ueNodes.Get(1), UdpSocketFactory::GetTypeId ());
ns3UdpSocket->Bind();
ns3UdpSocket->Connect(sinkAddress);
Ptr<Packet> packet = Create<Packet> (reinterpret_cast<const uint8_t*> ("Packet Via (LTE simulating Safety)"), 39);
ns3UdpSocket->Send(packet);

对于接收回叫，我有：

    void ReceivePacket (Ptr<Socket> socket){
     Ptr<Packet> packet;
     uint32_t nodeIdr=socket->GetNode()->GetId();
     while ((packet = socket->Recv ()))
     {
        uint8_t buf[1300];
        packet->CopyData(buf , packet->GetSize());
        std::cout<<"Data, "<<buf<< ", SimulatorTime, "<<Simulator::Now().GetSeconds()<<" NodeIDR "<<nodeIdr<<std::endl;
    }}

执行此操作时，将调用receive回调，但这似乎是回送传输。如果我更改ueNode.Get（）程序SIGSEGV：

    Ptr<Socket> ns3UdpSocket = Socket::CreateSocket (ueNodes.Get(**0**), UdpSocketFactory::GetTypeId ());

谁能告诉我我可能做错了什么，以及将自定义数据包从一个ue发送到另一个ue需要什么？

提前感谢您，并对格式表示歉意。第一次发布。

Answer 1

对于感兴趣的任何人：我查看了udp-client.cc文件，并注意到-> SetAllowBroadcast设置为true。此外，它似乎需要作为计划的事件运行。这摆脱了错误，现在正在工作。这是用于根据内容定制数据包的更新后的工作代码。

    uint16_t otherPort = 3000;
for (uint32_t u = 0; u < ueNodes.GetN (); ++u)
{
    Ptr<ns3::Socket> srcSkt = Socket::CreateSocket(ueNodes.Get(u), tid);
    InetSocketAddress local = InetSocketAddress (Ipv4Address::GetAny (), otherPort);
    srcSkt->Bind (local);
    srcSkt->SetRecvCallback (MakeCallback (&ReceivePacket));
    if (u+1 < ueNodes.GetN ())
    {
        Ptr<Socket> ns3UdpSocket = Socket::CreateSocket (ueNodes.Get(u), tid);
        Ptr<Packet> pkt = Create<Packet> (reinterpret_cast<const uint8_t*> ("Packet Via (LTE simulating Safety)"), 39);
        InetSocketAddress remote = InetSocketAddress (ueIpIface.GetAddress(u+1), otherPort);
        ns3UdpSocket->Bind(remote);
        ns3UdpSocket->SetRecvCallback (MakeNullCallback<void, Ptr<Socket> > ());
        ns3UdpSocket->SetAllowBroadcast (true);
        ns3UdpSocket->Connect (remote);
        nodeInfo[u].sendSocketLTE=ns3UdpSocket;
        nodeInfo[u].sendSocketLTE=ns3UdpSocket;
    }
    else
    {
        Ptr<Socket> ns3UdpSocket = Socket::CreateSocket (ueNodes.Get(u), tid);
        Ptr<Packet> pkt = Create<Packet> (reinterpret_cast<const uint8_t*> ("Packet Via (LTE simulating Safety)"), 39);
        InetSocketAddress remote = InetSocketAddress (ueIpIface.GetAddress(u-1), otherPort);
        ns3UdpSocket->Bind(remote);
        ns3UdpSocket->SetRecvCallback (MakeNullCallback<void, Ptr<Socket> > ());
        ns3UdpSocket->SetAllowBroadcast (true);
        ns3UdpSocket->Connect (remote);
        nodeInfo[u].sendSocketLTE=ns3UdpSocket;
    }
}

我创建了一个结构来存储套接字，并在需要发送数据包nodeInfo [x] .ns3UdpSocket-> send（packet）时简单地调用它。祝你好运。

NS3套接字混乱（需要帮助理解）

1 个答案: