omnet++ 中是否send()
将数据包的源地址设置为当前主机地址?
我为什么要问?因为我正在尝试为执行重放攻击的恶意主机“Eve”编写一个类。
void MalAODVRouter::handleMessage(cMessage *msg)
{
cMessage *ReplayMsg = msg->dup();
AODVRouting::handleMessage(msg);
capturedMsgs++;
if (capturedMsgs==10) // One out of every 10 packets (frequency of replay)
{
//we can add a delay before sending the copy of the message again (1 time unit)
sendDelayed(ReplayMsg, 1,"ipOut");
ReplayedMsgs++;
std::cout<<"Launched Replay Packet!\n";
ev<<"Launched Replay Packet!\n";
this->capturedMsgs=0;
// }
}
}
您可以在我的代码片段的开头看到我尝试使用该函数dup()
来复制一个数据包 ( msg
) Eve 接收到的数据包,而它正在前往合法目的地的途中。现在,我可以稍后发送重复的数据包并且它将具有原始源地址还是我应该更深入地挖掘层以伪造源地址以获得 Bob 的地址而不是 Eve 的地址?如下所示:
/*UDPPacket *udpPacket = dynamic_cast<UDPPacket *>(msg);
AODVControlPacket *ctrlPacket = check_and_cast<AODVControlPacket *>(udpPacket->decapsulate());
IPv4ControlInfo *udpProtocolCtrlInfo = dynamic_cast<IPv4ControlInfo *>(udpPacket->getControlInfo());
ASSERT(udpProtocolCtrlInfo != NULL);
IPv4Address sourceAddr = udpProtocolCtrlInfo->getSrcAddr(); //get Source Address
IPv4Address destinationAddr = udpProtocolCtrlInfo->getDestAddr(); //get Destination Address
IPv4Address addr = getSelfIPAddress();
if (addr != destinationAddr) // if it is not destined for "Eve"
{
UDPPacket *ReplayUDPPacket = udpPacket;
AODVControlPacket *ReplayCtrlPacket = check_and_cast<AODVControlPacket *>(ReplayUDPPacket->decapsulate());
IPv4ControlInfo *ReplayUDPProtocolCtrlInfo = dynamic_cast<IPv4ControlInfo *>(ReplayUDPPacket->getControlInfo());
ASSERT(ReplayUDPProtocolCtrlInfo != NULL);
ReplayUDPProtocolCtrlInfo->setSrcAddr(sourceAddr); //Forge Source
ReplayUDPProtocolCtrlInfo->setDestAddr(destinationAddr); //Keep Destination
*/
//we can add a delay before sending the copy of the message again (1 time unit)
sendDelayed(ReplayMsg, 1,"ipOut");
ReplayedMsgs++;
std::cout<<"Launched Replay Packet!\n";
ev<<"Launched Replay Packet!\n";
this->capturedMsgs=0;
该send()
方法是否自动将传出数据包的源地址设置为当前主机地址?如果是这样,那么我的重播尝试不起作用......