[Planetlab-users] A problem with running nmap. Thanks!

[Xin Hu]

Hi, 

I am a new user of planetlab. I am trying to use nmap to do some experiments
but encounter a problem. I hope I can get some help or advice from you here.
Thanks!

 

After nmap is running, it shows following error message:

sendto in send_ip_packet: sendto(4, packet, 60, 0, 192.6.10.2, 16) =>
Operation not permitted

 

I read the previous archive and found that this problem may caused by using
raw packets which is not supported by planetlab. And I also read the VNET
document, but still cannot solve the problem. Some people say that the
socket must be binded to specific local port to send raw packet. I tried
this, but it still doesn't work. The binding code of nmap is:

 

/* We set the socket lingering so we will RST connection instead of wasting

   bandwidth with the four step close  */

void init_socket(int sd) {

  struct linger l;

  int res;

  static int bind_failed=0;

  struct sockaddr_storage ss;

  size_t sslen;

 

  l.l_onoff = 1;

  l.l_linger = 0;

 

  if (setsockopt(sd, SOL_SOCKET, SO_LINGER,  (const char *) &l,
sizeof(struct linger)))

    {

      fprintf(stderr, "Problem setting socket SO_LINGER, errno: %d\n",
socket_errno());

      perror("setsockopt");

    }

  if (o.spoofsource && !bind_failed)

    {

      o.SourceSockAddr(&ss, &sslen);

      res=bind(sd, (struct sockaddr*)&ss, sslen);

      if (res<0)

         {

           fprintf(stderr, "init_socket: Problem binding source address
(%s), errno :%d\n", inet_socktop(&ss), socket_errno());

           perror("bind");

           bind_failed=1;

         }

    }

}

 

 

Can anybody give me some advice on how to solve this problem? Thank you very
much! Any suggestions would be greatly appreciated!

 

Sincerely yours,

Xin Hu

 

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