On Sat, Jul 20, 2019 at 8:42 PM John Sullivan <jseth...@kanargh.org.uk> wrote: > One of the properties of LFSRs is that a 1 bit in the input toggles a > completely predictable set of register bits *at any point in the > future*. This isn't often useful for most CRC caculations on variable > sized input, as the cost of working out which those bits are vastly > outweighs most other methods.
This is very interesting property! Thanks John! > But here we have a fixed 11 bit input I am sorry, but I have completely missed out there there are two places where CRC5 is calculated: * In SETUP, OUT, IN, PING and SOF the CRC5 is calculated on 11 bits * In SPLIT the CRC5 is calculated on 19 bits > static const char ival = 0x08; This looks like swapped bit order to me. The CRC5 value for 11-bits of 0 is 0x02. ___________________________________________________________________________ Sent via: Wireshark-dev mailing list <wireshark-dev@wireshark.org> Archives: https://www.wireshark.org/lists/wireshark-dev Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev mailto:wireshark-dev-requ...@wireshark.org?subject=unsubscribe
