SERVER

// ConsoleApplication2.cpp : Defines the entry point for the console application.
//
#include <time.h>
#include <locale.h>
#include "stdafx.h"
#include <winsock2.h>
#include <conio.h>
#include <stdio.h>
#include <cstdlib>
#include <cstdio>
#include <ctime>
#pragma comment(lib,"WS2_32.lib")
#define PORT 8888
#define BUFFLEN 512
int main()
{
    srand(time(NULL));
    char buf[BUFFLEN];
    char buf2[BUFFLEN]= "TEST!";
    SOCKET s;
    int slen, recv_len;
    WSADATA wsa;
    struct sockaddr_in server, si_other;
    slen = sizeof(si_other);
    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0)
    {
        printf("Błąd wsadata KOD: %d", WSAGetLastError());
        getch();
    }

    if ((s = socket(AF_INET, SOCK_DGRAM, 0)) == INVALID_SOCKET)  // ew w miejsce zera dać IPPROTOUDP
    {
        printf("Błąd tworzenia gniazda KOD: %d", WSAGetLastError());
        getch();
    }

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

    if (bind(s, (struct sockaddr *)&server, sizeof(server)) == SOCKET_ERROR)
    {
        printf("Błąd Bindowania KOD: %d", WSAGetLastError());
        getch();
    }
    puts("Bindowanie zakończone");
    int iResult = 0;
    int ibuf=0;
    int ran = 0;
    while (true)
    {
        printf("oczekiwanie na dane: ");
        fflush(stdout);
        //memset ?
        /*double liczba = rand() % 1401;
        sprintf(buf2, "%f",liczba);*/
        /*
        int liczba = rand() % 3871;
        sprintf(buf2, "%d", liczba);*/



    /*  if ((recv_len = recvfrom(s, buf, BUFFLEN, 0, (sockaddr *)&si_other, &slen)) == SOCKET_ERROR)
            {
            printf("Błąd recv_len <while> KOD: %d", WSAGetLastError());
            getch();
            exit(EXIT_FAILURE);
            }
        */


        if ((recv_len = recvfrom(s, (char*)&ibuf, sizeof(ibuf), 0, (sockaddr *)&si_other, &slen)) == SOCKET_ERROR)
        {
            printf("Błąd recv_len <while> KOD: %d", WSAGetLastError());
            getch();
        }


    /*  buf[recv_len] = '\0';
        printf("\nOdebrano pakiet danych z %s : %d \n", inet_ntoa(si_other.sin_addr), ntohs(si_other.sin_port));
        printf("\nDane %s\n", buf);*/

        printf("\nDane:   %d\n", ibuf);

    /*  iResult = sendto(s, buf2, strlen(buf2), 0, (SOCKADDR *)&si_other, slen);
        if (iResult == SOCKET_ERROR) {
            printf("Bład wysyłania: %d", WSAGetLastError());
            _getch();
            return 1;
        }*/
        ran = rand() % 65443 + 4;
            iResult = sendto(s, (char*)&ran, sizeof(ran), 0, (SOCKADDR *)&si_other, slen);
            if (iResult == SOCKET_ERROR) {
                printf("Bład wysyłania: %d", WSAGetLastError());
                _getch();
                return 1;
            }

    } // koniec while

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