exact crc calculation

[47x65x72x68x61x72x64]

hi

can someone tell me, how to calculate the crc32-code in the FCS-field of a ethernet frame?
i know the crc-32 polynom.
questions:
- is the correct init. FF FF FF FF?
- is it necessary/correct to invert the first 32 bit of the frame - calculate the crc32 and invert the result?
- what happens when at the very end of the frame only 1, 2 or 3 bytes existing for calculating crc? at which position are these bytes written and how is the rest (up to 32 bit) filled?

tnx
gerhard

 

[pansophic]

Does this help?

http://glide.stanford.edu/lxr/source/lib/crc32.c?v=linux-2.6.5

I have to ask if your name is Long?


pansophic