Thank you, but I still don't know how to generate the checksum. I need to send some UDP packets without the kind of data behind the '->' , but that data must be preceded by a checksum, and without it my target ignores the packet. I have even considered to send all the possible combinations, but since they are composed of two bytes they are 256^2 (65536). With each packet weighting =~ 40 bytes, I should have to send 2.5MB...
