Date: Tue, 26 Apr 2005 22:38:42 -0700 From: Tim Kientzle <kientzle@freebsd.org> To: Jose M Rodriguez <josemi@freebsd.jazztel.es> Cc: Marcel Moolenaar <marcel@xcllnt.net> Subject: Re: rigth crc32 implementation Message-ID: <426F2562.2090008@freebsd.org> In-Reply-To: <200504270052.33158.josemi@redesjm.local> References: <200504261143.55195.josemi@redesjm.local> <426E9E1C.6020609@errno.com> <20050426221922.GD8621@ns1.xcllnt.net> <200504270052.33158.josemi@redesjm.local>
next in thread | previous in thread | raw e-mail | index | archive | help
Jose M Rodriguez wrote: > El Miércoles, 27 de Abril de 2005 00:19, Marcel Moolenaar escribió: >>On Tue, Apr 26, 2005 at 01:01:32PM -0700, Sam Leffler wrote: >> >>>Note also there is CRC32 code of this sort in WEP and TKIP crypto >>>modules in the net80211 support. >> >>Given the seperation of crc32() into crc32_raw() and crc32(), with >>either crc32() only or otherwise both functions inlined, are there >>any obstacles preventing the 802.11 code from using the ones in >>src/sys/libkern? > > at last, sys/dev/if_sbni have another implementation of what seems to be > a crc32 alg. Be a little careful, please. There are very many different, incompatible "32-bit CRCs." There are just a few popular ones, so you can often combine functions, but not always. Any CRC implementation should clearly document the generating polynomial and the preconditioning and postconditioning assumptions. Tim Kientzle
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?426F2562.2090008>