c++ - 如何在 omnet++ 中使用 AODV 协议(protocol)实现重放攻击？

Question

我需要一段 C++ 代码来模拟 AODV 网络，其中的恶意节点会进行重放攻击。我需要将它嵌入到我的 OMNet++ 项目中。

我试图在 OMNet++ 中更改示例项目中的原始代码，但我又回到了起点。

很高兴能找到帮助。

我无法包含示例代码，它的字符相当长，如果您需要查看我到目前为止的试验，请告诉我在哪里可以分享我的项目。

Answer 1

由于OP问题缺少一些细节，我将在Wikipedia article's example之后提供一个模拟解决方案。对于重放攻击:

Suppose Alice wants to prove her identity to Bob. Bob requests her password as proof of identity, which Alice dutifully provides (possibly after some transformation like a hash function); meanwhile, Eve is eavesdropping on the conversation and keeps the password (or the hash). After the interchange is over, Eve (posing as Alice) connects to Bob; when asked for a proof of identity, Eve sends Alice's password (or hash) read from the last session, which Bob accepts thus granting access to Eve.

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我将通过向 UDPPacket 添加 source 和 destination 字段来创建一个新数据包(扩展 UDPPacket)来满足您的特定应用程序目标:

cplusplus {{                
#include "<directory_path_for_the_udp_packet_goes_here>/UDPPacket_m.h"      // inheriting the parent class

}}

class ExtendedUDPPacket;    // you can call it whatever you want

message ExtendedUDPPacket extends UDPPacket 
{
    string sourceNode;          // name of the sender
    string destinationNode;         // name of the receiver
}

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现在让我们看看给定示例中的 3 个不同角色:

1. 爱丽丝:需要验证
2. 鲍勃:验证者
3. 夏娃:窃听者

如果我们考虑到每个节点都有一个包含其名称的特定 ID，我们可以为每个角色执行以下操作:

爱丽丝:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (this->myID == eUDPmsg->getDestinationNode())      // myID is "Alice"
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(myID.c_str());
        ExtendedUDPPacket->setDestinationAddress(std::string("Bob").c_str());

        send(udpPacket, "ipOut");
    }
}

夏娃:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (this->myID != eUDPmsg->getDestinationNode())      // myID is "Eve"
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(std::string("Alice").c_str());  // fake the message
        ExtendedUDPPacket->setDestinationAddress(std::string("Bob").c_str());

        send(udpPacket, "ipOut");
    }
}

鲍勃:

void MalAODVRouter::handleMessage(cMessage *msg)
{
    ExtendedUDPPacket *eUDPmsg = dynamic_cast<UDPPacket *>(msg);
    if (eUDPmsg->getSourceNode() == 'Alice')   
    {
        ExtendedUDPPacket *ExtendedUDPPacket= new UDPPacket();
        ExtendedUDPPacket->setSourceAddress(std::string("Bob").c_str());
        ExtendedUDPPacket->setDestinationAddress(std::string("Alice").c_str());


        send(udpPacket, "ipOut");
    }
}

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请记住这是一个模拟实现，您可以添加更智能的条件检查以使应用程序表现得更好。