Thank you for your help thus far. I am now getting the expected results for $tos and $len, however, $ver and $hlen are still not right.

first, your "vec($ver_hlen, 4, 0)" brings up "illegal number of bits", due to 0 but being a power of 2 between 1 and 32 (from perldoc -f vec).

I am having trouble understanding exactly what the bits field is. Is that the number of bits that you want to read in? if so, wouldn't: 
my ($ver, $hlen) = (vec($ver_hlen, 0, 4), vec($ver_hlen, 4, 4));

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be better? Using the the changes i made above, I get unexpected results for the values for $ver and $hlen, which leads me to believe I am wrong.

In reply to Re: Re^3: IP Header by Anonymous Monk
in thread IP Header by Anonymous Monk

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