[C++] многопоточный сканер портов

[IBM]

Всем привет. К теме форума относится косвенно, но как пример работы с сетью самое то. Мб вы пишете сетевого червя? Тогда для сетевого червя нужно заменить инкремент портов на рандом айпи =D

#include <iostream>
#include <cstdlib>
#include <winsock2.h>
#include <windows.h>

#pragma comment(lib, "ws2_32.lib");

using namespace std;

int error,p_start,p_end;
char ip[] = "111.111.111.111";
HANDLE        hThread;
DWORD        dwThreadId;
int                iSize; 
int j;   
int n = 0;
DWORD WINAPI scan(LPVOID param)
  {
    n++;
    WSADATA wsa;
    int prt = j;
    SOCKET s;
    SOCKADDR_IN a;
    WSAStartup(0x0101,&wsa);
    a.sin_family = AF_INET;
    a.sin_addr.s_addr = inet_addr(ip);
    s = socket(AF_INET,SOCK_STREAM,0);
    a.sin_port = htons(prt);
    int err = (connect(s,(sockaddr*)&a,sizeof(a)));
    if (err==0)
      {
          cout << prt << " - Opened";
          if (prt == 21) cout << " (ftp) " << endl;
          if (prt == 80) cout << " (http) " << endl;
          if (prt == 23) cout << " (telnet) " << endl;
          if (prt == 25) cout << " (smtp) " << endl;
          if (prt == 3389) cout << " (rdp) " << endl;
          if (prt == 22) cout << " (ssh) " << endl;
          if (prt == 5631) cout << " (PC Anywhere) " << endl;
          if (prt == 110) cout << " (pop3) " << endl;
          if (prt == 143) cout << " (imap) " << endl;
          if (prt == 443) cout << " (http) " << endl;
          if (prt == 135) cout << " (DCOM) " << endl;
          if (prt == 445) cout << " (smb) " << endl;
          if (prt == 1604) cout << " (probably DarkComet RAT) " << endl;
          if (prt == 5222) cout << " (xmpp) " << endl;
          cout << endl;
          
      }
       if (n == (p_end-p_start)) cout << "Scan finished!" << endl;
    shutdown(s,2);
    closesocket(s);
    WSACleanup();
    ExitThread(0);
  } 
int main()
{
    cout << "From> ";
    cin >> p_start;
    cout << "To > ";
    cin >> p_end;
    cout << "IP: ";
    cin >> ip;
    for (j = p_start; j <= p_end; j++)
      {
        hThread = CreateThread(NULL, 0, scan,  
          (LPVOID)scan, 0, &dwThreadId);
        Sleep(5);
      } 
    system("pause >nul");
    printf("thank you for using this scanner\n");
    Sleep(500);
    ExitProcess(0);
}

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