Question

I’m trying to send a specific packet size (100 bytes) with scapy but cant seem to get it.

I’m using this to start.

sr(IP(dst="192.168.1.1")/TCP(dport=443))

Looking at the docs / help I cant tell if I can use PacketLenField to specify the length of the packet. I can do it with NMAP & NSE but would like to do it outside of NMAP.

Any ideas on this one?

Thanks!

Answer 1

You can just add on the required number of bytes as a String when crafting the packet e.g.:

payload = 'ZZZZZZZZZZZZZZZZZZZZZ'
pkt = Ether() / IP() / TCP() / payload

will work. You just need to adjust the length of the payload as you require.