Re: SCTP: use lib/libcrc32c.c instead of net/sctp/crc32c.c?

netdev

Re: SCTP: use lib/libcrc32c.c instead of net/sctp/crc32c.c?

To:	Adrian Bunk <bunk@xxxxxxxxx>
Subject:	Re: SCTP: use lib/libcrc32c.c instead of net/sctp/crc32c.c?
From:	Sridhar Samudrala <sri@xxxxxxxxxx>
Date:	Fri, 13 May 2005 18:01:27 -0700
Cc:	Clay Haapala <chaapala@xxxxxxxxx>, lksctp-developers@xxxxxxxxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
In-reply-to:	<20050513135004.GG3603@stusta.de>
References:	<20050513135004.GG3603@stusta.de>
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Adrian Bunk wrote:

As far as I understand it, lib/libcrc32c.c could be used instead of the similar code in net/sctp/crc32c.c .

Is there any reason why this isn't done?

The SCTP RFC3309 says that SCTP uses a tranport-level CRC where the bit
ordering is mirrored and different from link-level CRC.

The CRC is computed using a procedure similar to ETHERNET CRC [ITU32],
modified to reflect transport level usage.

So I am not sure if we can use the libcrc32c routines for calculating SCTP
crc32 checksum. But if it is possible, we should definitely use the crc32
library.

Thanks
Sridhar

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