Server.cpp

#include <iostream>
#include <string>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")

#define PORT 8888
#define BUFFER_SIZE 1024

int main() {
    WSADATA wsaData;
    SOCKET serverSocket;
    struct sockaddr_in serverAddress, clientAddress;
    int clientAddressSize = sizeof(clientAddress);
    char buffer[BUFFER_SIZE];

    // Initialize Winsock
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "Failed to initialize Winsock" << std::endl;
        return -1;
    }

    // Create socket
    serverSocket = socket(AF_INET, SOCK_DGRAM, 0);
    if (serverSocket == INVALID_SOCKET) {
        std::cerr << "Failed to create socket: " << WSAGetLastError() << std::endl;
        WSACleanup();
        return -1;
    }

    serverAddress.sin_family = AF_INET;
    serverAddress.sin_addr.s_addr = INADDR_ANY;
    serverAddress.sin_port = htons(PORT);

    // Bind the socket to the specified address and port
    if (bind(serverSocket, (struct sockaddr*)&serverAddress, sizeof(serverAddress)) == SOCKET_ERROR) {
        std::cerr << "Failed to bind socket: " << WSAGetLastError() << std::endl;
        closesocket(serverSocket);
        WSACleanup();
        return -1;
    }

    std::cout << "Server listening on port " << PORT << std::endl;

    while (true) {
        // Receive data from client
        int recvResult = recvfrom(serverSocket, buffer, BUFFER_SIZE, 0, (struct sockaddr*)&clientAddress, &clientAddressSize);
        if (recvResult == SOCKET_ERROR) {
            std::cerr << "Failed to receive data: " << WSAGetLastError() << std::endl;
            break;
        }

        // Print received data
        std::cout << "Received from client: " << buffer << std::endl;

        // Echo the received data back to the client
        int sendResult = sendto(serverSocket, buffer, recvResult, 0, (struct sockaddr*)&clientAddress, clientAddressSize);
        if (sendResult == SOCKET_ERROR) {
            std::cerr << "Failed to send data: " << WSAGetLastError() << std::endl;
            break;
        }
    }

    // Cleanup
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}