Hi,

I propose a solution to fix the issue some of us are facing with your package, in particular on ubuntu. I change two parts:

1. I skip the IPv4 decoding, because we get the ICMP packet (suggested by @lz520520)
2. I compare the payload because the ident is modified for whatever reason

Things are now ok on my side (tested on various hosts), I hope it would help.

Sincerely,
jC