SP_LV4_ZAD1_Klijent

// Client.cpp
#include <winsock2.h>
#include <ws2tcpip.h>
#include <iostream>
#include <string>

#pragma comment(lib, "Ws2_32.lib")

#define SERVER_IP "127.0.0.1"
#define PORT 8080

int main() {
    WSADATA wsaData;
    SOCKET clientSocket;
    sockaddr_in serverAddr;
    char buffer[1024];
    std::string name;

    // Initialize WinSock
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "WSAStartup failed.\n";
        return 1;
    }

    // Create socket
    clientSocket = socket(AF_INET, SOCK_STREAM, 0);
    if (clientSocket == INVALID_SOCKET) {
        std::cerr << "Socket creation failed.\n";
        WSACleanup();
        return 1;
    }

    // Set server address
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(PORT);
    if (InetPtonA(AF_INET, SERVER_IP, &serverAddr.sin_addr) <= 0) {
        std::cerr << "Invalid address or address not supported.\n";
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    // Connect to server
    if (connect(clientSocket, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        std::cerr << "Connection failed.\n";
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    // Send name to server
    std::cout << "Enter your name: ";
    std::cin >> name;
    std::string message = "N" + name;
    send(clientSocket, message.c_str(), message.size(), 0);

    // Receive response from server
    int bytesReceived = recv(clientSocket, buffer, sizeof(buffer), 0);
    if (bytesReceived > 0) {
        buffer[bytesReceived] = '\0';
        std::cout << "Server: " << buffer << "\n";
    }

    // Wait for "P" message
    bytesReceived = recv(clientSocket, buffer, sizeof(buffer), 0);
    if (bytesReceived > 0) {
        buffer[bytesReceived] = '\0';
        if (std::string(buffer, bytesReceived) == "P") {
            std::cout << "Server sent: P\n";

            // Prompt user to enter "OK"
            std::string userInput;
            std::cout << "Enter 'OK': ";
            std::cin >> userInput;

            // Send "OK" back to server
            if (userInput == "OK") {
                send(clientSocket, userInput.c_str(), userInput.size(), 0);
            }
            else {
                std::cerr << "Invalid input. Closing connection.\n";
            }
        }
    }

    closesocket(clientSocket);
    WSACleanup();
    return 0;
}