Question about socket netlink

[lam wai wm <00028911@brookes.ac.uk>]

Hi all,

I've created a program using socket netlink, but error emerge 
in the statement of "ipq_set_mode".  Could you tell me the 
reason behind that?  I've already compiled the kernel with 
netlink options.

Code :
.
  if ((qh = ipq_create_handle(IPQ_FLAG_PROMISC, 0)) == NULL) {
    ipq_perror("create_handle()");
    exit(1);
  }

  if (ipq_set_mode(qh, IPQ_COPY_PACKET, MAX_PACKET_LEN) < 0) {
    ipq_perror("set_mode()");
    goto cleanup;
  }
.

And it prompted me that
set_mode(): Failed to send netlink message: Connection refused  
 
Is there anything I've missed?
Apart from that, is it possible to change the payload in the 
packet?  I mean probably the packet would be larger than the 
original size.

Thanks so much

your sincerely,
marco.



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