I would like to send fragmented packets size of 8 bytes and a random starting offset. Also want to leave out the last fragmented packet.
So far I got everything except the fragment of
from scapy.all import *
from random import randint
dip="MY.IP.ADD.RESS"
payload="A"*250+"B"*500
packet=IP(dst=dip,id=12345,off=123)/UDP(sport=1500,dport=1501)/payload
frags=fragment(packet,fragsize=8)
print(packet.show())
for f in frags:
send(f)
What does the above code do? It sends IP Fragment Packets size of 8 byte to a destination IP address.
I would like to send IP Fragment Packets with a random Frag Offset.
I can't find anything about fragment()
and the only field, I was able to edit was in IP packet instead of each fragmented IP packet.
Does someone have an idea to accomplish this?
Infos: Python2.7, latest version of scapy (pip)
If you want to generate "broken" fragment offset fields, you have to do that yourself. The scapy fragment() function is simple enough:
Source: https://github.com/secdev/scapy/blob/652b77bf12499451b47609b89abc663aa0f69c55/scapy/layers/inet.py#L891
If you change the marked code line above, you can set the fragment offset to whatever you want.