title: Set IP_HDRINCL to setsockopt function in win32
body: <p>I'm fighting with raw sockets in Win32 and now I'm stuck, the soetsockopt function give me the 10022 error (invalid argument), but I think I pass the correct arguments... of course I'm wrong u_u' </p>
  
  <pre><code>sock = socket(AF_INET,SOCK_RAW,IPPROTO_UDP);
  if (sock == SOCKET_ERROR)
  {
    printf("Error socket(): %d", WSAGetLastError());
    return;
  }
  char on = 1;
  error =  setsockopt(sock,IPPROTO_IP,IP_HDRINCL,&amp;on,sizeof(on)); 
  if (sock == SOCKET_ERROR)
  {
    printf("Error setsockopt(): %d", WSAGetLastError());
    return;
  }
  </code></pre>
  
  <p>Anybody knows what happen to my code?</p>