hi experts...
i know it is of really bad etiquette answering over you own email, but
as soon i sent this mail i did the following test which seems to be
working...just wanted to share it and see if anybody sees anything
wrong with this approach...
i defined an hex-string to an hex-binary-blob function inside
packet_utils.py (conversion method taken from Brian@stackoverflow)
1 def octstr_to_hexbinary(octstr):
2 hexdigits = [int(x,16) for x in octstr]
3 blob = ''.join(struct.pack('B',(high<<4) + low) for high,low in
zip(hexdigits[::2], hexdigits[1::2]))
4 return blob
then on my controller program i did the following
1 from scapy.all import *
2 ...
3 def arping_me(self, dpid, inport, packet, buf, bufid):
4 """If arping one of my own IPs respond"""
5 log.debug("+++ inside arping_me")
6 print array_to_octstr(packet.arr)
7 e=Ether(octstr_to_hexbinary(array_to_octstr(packet.arr)))
8 e.show()
in (6) i'm printing the hex string representation of the packet...
in (7) i'm calling octstr_to_hexbinary to get a binary "blob" that i
could use with scapy...
in (8) i get a variable 'e' which can be scapy-manipulated...
does this sounds right?
regards,
javier
On Thu, Oct 13, 2011 at 4:40 PM, Javier Liendo <jav...@liendo.net> wrote:
> hi experts,
>
> a) is there a way to decode/parse a receiving packet inside nox using scapy?
>
> b) is it possible to craft a packet using scapy and then use it (i.e.
> send_openflow) inside nox?
>
> regards,
>
> javier
>
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