[nox-dev] using scapy with nox
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 ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
Re: [nox-dev] using scapy with nox
From the second listing, I think line 7 can be something like:
e = Ether(packet.arr.tostring())
(which is much more efficient and straightforward)
-- Murphy
On Oct 13, 2011, at 3:48 PM, Javier Liendo wrote:
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):
2hexdigits = [int(x,16) for x in octstr]
3blob = ''.join(struct.pack('B',(high4) + low) for high,low in
zip(hexdigits[::2], hexdigits[1::2]))
4return 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
5log.debug(+++ inside arping_me)
6print array_to_octstr(packet.arr)
7e=Ether(octstr_to_hexbinary(array_to_octstr(packet.arr)))
8e.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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http://noxrepo.org/mailman/listinfo/nox-dev
___
nox-dev mailing list
nox-dev@noxrepo.org
http://noxrepo.org/mailman/listinfo/nox-dev
Re: [nox-dev] using scapy with nox
Javier,
while not directly related to its use in NOX, you may want to have a
look at oftest, 1.0 test suites do use scapy for a number of tests...
Keep posting updates on your research,
regards,
Christian
On Thu, Oct 13, 2011 at 20:25, Javier Liendo jav...@liendo.net wrote:
you are absolutely right...thanks for the tip...
On Thu, Oct 13, 2011 at 6:18 PM, Murphy McCauley jam...@nau.edu wrote:
From the second listing, I think line 7 can be something like:
e = Ether(packet.arr.tostring())
(which is much more efficient and straightforward)
-- Murphy
On Oct 13, 2011, at 3:48 PM, Javier Liendo wrote:
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',(high4) + 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
___
nox-dev mailing list
nox-dev@noxrepo.org
http://noxrepo.org/mailman/listinfo/nox-dev
___
nox-dev mailing list
nox-dev@noxrepo.org
http://noxrepo.org/mailman/listinfo/nox-dev
--
Christian
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