Simulation of Data Link Layer Protocols Gaming Project in C++

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3 months ago

#include <iostream>
#include <vector>
#include <string>
#include <cstdlib>
#include <ctime>

class Frame {
public:
    Frame(const std::string& data) : data(data) {
        checksum = calculateChecksum(data);
    }

    std::string getData() const { return data; }
    int getChecksum() const { return checksum; }

    bool isCorrupted() const {
        return calculateChecksum(data) != checksum;
    }

private:
    std::string data;
    int checksum;

    int calculateChecksum(const std::string& data) const {
        int sum = 0;
        for (char c : data) {
            sum += static_cast<int>(c);
        }
        return sum % 256; // Simple checksum (mod 256)
    }
};

class DataLinkLayer {
public:
    void sendFrame(const Frame& frame) {
        std::cout << "Sending frame with data: " << frame.getData() << std::endl;
        receivedFrame = frame;
    }

    void receiveFrame() {
        if (receivedFrame.isCorrupted()) {
            std::cout << "Error: Frame is corrupted." << std::endl;
        } else {
            std::cout << "Frame received successfully with data: " << receivedFrame.getData() << std::endl;
        }
    }

private:
    Frame receivedFrame{"default"};
};

int main() {
    std::srand(std::time(0));

    DataLinkLayer linkLayer;

    // Simulate sending a frame
    std::string data = "Hello, Data Link Layer!";
    Frame frame(data);
    linkLayer.sendFrame(frame);

    // Simulate potential corruption
    if (std::rand() % 2) {
        // Simulate corruption by altering data
        std::string corruptedData = data;
        corruptedData[0] = (corruptedData[0] == 'H') ? 'X' : 'H'; // Simple corruption example
        Frame corruptedFrame(corruptedData);
        linkLayer.sendFrame(corruptedFrame);
    }

    // Receive and check the frame
    linkLayer.receiveFrame();

    return 0;
}

#include <iostream>

#include <vector>

#include <string>

#include <cstdlib>

#include <ctime>

class Frame {

public:

Frame(const std::string& data) : data(data) {

checksum = calculateChecksum(data);

}

std::string getData() const { return data; }

int getChecksum() const { return checksum; }

bool isCorrupted() const {

return calculateChecksum(data) != checksum;

}

private:

std::string data;

int checksum;

int calculateChecksum(const std::string& data) const {

int sum = 0;

for (char c : data) {

sum += static_cast<int>(c);

}

return sum % 256; // Simple checksum (mod 256)

}

};

class DataLinkLayer {

public:

void sendFrame(const Frame& frame) {

std::cout << "Sending frame with data: " << frame.getData() << std::endl;

receivedFrame = frame;

}

void receiveFrame() {

if (receivedFrame.isCorrupted()) {

std::cout << "Error: Frame is corrupted." << std::endl;

} else {

std::cout << "Frame received successfully with data: " << receivedFrame.getData() << std::endl;

}

private:

Frame receivedFrame{"default"};

};

int main() {

std::srand(std::time(0));

DataLinkLayer linkLayer;

// Simulate sending a frame

std::string data = "Hello, Data Link Layer!";

Frame frame(data);

linkLayer.sendFrame(frame);

// Simulate potential corruption

if (std::rand() % 2) {

// Simulate corruption by altering data

std::string corruptedData = data;

corruptedData[0] = (corruptedData[0] == 'H') ? 'X' : 'H'; // Simple corruption example

Frame corruptedFrame(corruptedData);

linkLayer.sendFrame(corruptedFrame);

}

// Receive and check the frame

linkLayer.receiveFrame();

return 0;

}

Explanation

Header Files:
- <iostream>: For input and output operations.
- <vector>: Used here just for completeness in case of extension.
- <string>: To handle string operations.
- <cstdlib>: For functions like std::rand().
- <ctime>: For seeding the random number generator.
Frame Class:
- Constructor: Initializes a frame with data and calculates its checksum.
- getData(): Returns the data of the frame.
- getChecksum(): Returns the checksum of the frame.
- isCorrupted(): Checks if the frame has been corrupted by comparing the calculated checksum with the stored checksum.
- calculateChecksum(): Computes a simple checksum by summing ASCII values of characters in the data and taking modulo 256.
DataLinkLayer Class:
- sendFrame(): Simulates sending a frame by storing it in receivedFrame.
- receiveFrame(): Checks the received frame for corruption and outputs the result.
main() Function:
- Seeds the random number generator.
- Creates an instance of DataLinkLayer.
- Creates a frame with some data and sends it.
- Simulates potential corruption by altering the frame’s data.
- Receives and checks the frame to detect any corruption.

Explanation

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