[libdnet-devel] Intercepting traffic using libdnet

[Rajkumar S. <raj...@as...>]

Hi,

I am looking to intercept the traffic flowing through my FreeBSD  
*gateway* and selectievly allow/reject traffic (snort_inline for  
FreeBSD) I had gone through the previous archives and now studying the  
fragroute-2.0b1 sources. From the source I am trying to extract the  
minimum possible code required for intercepting.

 From what I understand from the sources, the following is the minimum code:

import dnet, dpkt

dst = dnet.addr("192.168.3.49")
src = dnet.addr('192.168.3.50')
tun = dnet.tun(src, dst)
pkt = tun.recv()
print pkt
tun.send (pkt)
tun.close()

192.168.3.50 is the machine running this code and 49 is another  
machine. After running this program I am not able to ping from 49 to  
50 or vice versa.

What is the src and dst for? I do not yet fully comprehend what I have  
written, but is there some thing I am missing out? There is not much  
help available in the net. Any help here would be  much appreciated.

with warm regards,

raj