K 10 svn:author V 6 itojun K 8 svn:date V 27 2000-07-09T13:01:59.000000Z K 7 svn:log V 217 be more cautious about tcp option length field. drop bogus ones earlier. not sure if there is a real threat or not, but it seems that there's possibility for overrun/underrun (like non-NOP option with optlen > cnt). END