python - Receiving Custom Protocol Packets With Scapy and NetFilter Queue -


i doing project involves shimming packet custom layer containing specific fields. managed using guide here:

http://www.secdev.org/projects/scapy/doc/build_dissect.html

the guide great on how build , send packets custom layers, not on how receive them.

i have packet form:

ip()/customlayer()/icmp()

and sending packet host receive packet using python's netfilter queue , scapy libraries.

my question is, how receive incoming packet custom layers in , still have access fields? trying parse packet with

ip(packet)

seems not working.. appreciated!

have tried declare empty packet first?

pkt = ip()/customlayer()/icmp()

and then

pkt = ip(packet)

look here , may find solution problem: extract scapy custom layer


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