[PWŚS] Prosty Serwer / Klient

protip: Win32 Console Application -> Empty Project

//////////////////Server/////////////////////////////

#define _WINSOCK_DEPRECATED_NO_WARNINGS

#pragma comment(lib,"ws2_32.lib")
#include <WinSock2.h>
#include <iostream>

int main()
{
    //WinSock Startup
    WSAData wsaData;
    WORD DllVersion = MAKEWORD(2, 1);
    if (WSAStartup(DllVersion, &wsaData) != 0) //If WSAStartup returns anything other than 0, then that means an error has occured in the WinSock Startup.
    {
        MessageBoxA(NULL, "WinSock startup failed", "Error", MB_OK | MB_ICONERROR);
        return 0;
    }

    SOCKADDR_IN addr; //Address that we will bind our listening socket to
    int addrlen = sizeof(addr); //length of the address (required for accept call)
    addr.sin_addr.s_addr = inet_addr("127.0.0.1"); //Broadcast locally
    addr.sin_port = htons(1111); //Port
    addr.sin_family = AF_INET; //IPv4 Socket

    SOCKET sListen = socket(AF_INET, SOCK_STREAM, NULL); //Create socket to listen for new connections
    bind(sListen, (SOCKADDR*)&addr, sizeof(addr)); //Bind the address to the socket
    listen(sListen, SOMAXCONN); //Places sListen socket in a state in which it is listening for an incoming connection. Note:SOMAXCONN = Socket Oustanding Max Connections

    SOCKET newConnection; //Socket to hold the client's connection
    newConnection = accept(sListen, (SOCKADDR*)&addr, &addrlen); //Accept a new connection
    if (newConnection == 0) //If accepting the client connection failed
    {
        std::cout << "Failed to accept the client's connection." << std::endl;
    }
    else //If client connection properly accepted
    {
        std::cout << "Klient polaczony!" << std::endl;
        char MOTD[256] = "Udalo sie przeslac wiadomosc z klienta na serwer!"; //Create buffer with message of the day
        send(newConnection, MOTD, sizeof(MOTD), NULL); //Send MOTD buffer
    }

    system("pause");
    return 0;
}

//////////////////END OF SERVER ///////////////

/////////////////////CLIENT////////////////////

#define _WINSOCK_DEPRECATED_NO_WARNINGS

#pragma comment(lib,"ws2_32.lib")
#include <WinSock2.h>
#include <iostream>

int main()
{
    //Winsock Startup
    WSAData wsaData;
    WORD DllVersion = MAKEWORD(2, 1);
    if (WSAStartup(DllVersion, &wsaData) != 0) //If WSAStartup returns anything other than 0, then that means an error has occured in the WinSock Startup.
    {
        MessageBoxA(NULL, "Winsock startup failed", "Error", MB_OK | MB_ICONERROR);
        exit(1);
    }

    SOCKADDR_IN addr; //Address to be binded to our Connection socket
    int sizeofaddr = sizeof(addr); //Need sizeofaddr for the connect function
    addr.sin_addr.s_addr = inet_addr("127.0.0.1"); //Address = localhost (this pc)
    addr.sin_port = htons(1111); //Port = 1111
    addr.sin_family = AF_INET; //IPv4 Socket

    SOCKET Connection = socket(AF_INET, SOCK_STREAM, NULL); //Set Connection socket
    if (connect(Connection, (SOCKADDR*)&addr, sizeofaddr) != 0) //If we are unable to connect...
    {
        MessageBoxA(NULL, "Failed to Connect", "Error", MB_OK | MB_ICONERROR);
        return 0; //Failed to Connect
    }
    std::cout << "Polaczono z serwerem" << std::endl;

    char MOTD[256];
    recv(Connection, MOTD, sizeof(MOTD), NULL); //Receive Message of the Day buffer into MOTD array
    std::cout << "Wiadomosc:" << MOTD << std::endl;
    while (true)
    {
        Sleep(10);
    }
}

//////////////END OF CLIENT////////////////////