linux-toradex.git/include/net/sctp/checksum.h, branch v3.1.3 Linux kernel for Apalis and Colibri modules sctp: Clean up sctp checksumming code 2009-02-16T08:03:10+00:00 Vlad Yasevich vladislav.yasevich@hp.com 2009-02-13T08:33:42+00:00 4458f04c02a46c679a90ef71f866a415c192deb4 The sctp crc32c checksum is always generated in little endian. So, we clean up the code to treat it as little endian and remove all the __force casts. Suggested by Herbert Xu. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
The sctp crc32c checksum is always generated in little endian.
So, we clean up the code to treat it as little endian and remove
all the __force casts.

Suggested by Herbert Xu.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sctp: Fix crc32c calculations on big-endian arhes. 2009-01-22T22:52:23+00:00 Vlad Yasevich vladislav.yasevich@hp.com 2009-01-22T22:52:23+00:00 9c5ff5f75d0d0a1c7928ecfae3f38418b51a88e3 crc32c algorithm provides a byteswaped result. On little-endian arches, the result ends up in big-endian/network byte order. On big-endinan arches, the result ends up in little-endian order and needs to be byte swapped again. Thus calling cpu_to_le32 gives the right output. Tested-by: Jukka Taimisto <jukka.taimisto@mail.suomi.net> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
crc32c algorithm provides a byteswaped result.  On little-endian
arches, the result ends up in big-endian/network byte order.
On big-endinan arches, the result ends up in little-endian
order and needs to be byte swapped again.  Thus calling cpu_to_le32
gives the right output.

Tested-by: Jukka Taimisto <jukka.taimisto@mail.suomi.net>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sctp: remove unnecessary byteshifting, calculate directly in big-endian 2008-07-19T06:07:09+00:00 Harvey Harrison harvey.harrison@gmail.com 2008-07-19T06:07:09+00:00 336d3262df71fcd2661180bb35d5ea41b4cbca58 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[SCTP]: Use crc32c library for checksum calculations. 2008-01-28T22:58:20+00:00 Vlad Yasevich vladislav.yasevich@hp.com 2007-12-16T22:06:41+00:00 9ad0977fe10bd5d052a6db7738afe017367c2e32 The crc32c library used an identical table and algorithm as SCTP. Switch to using the library instead of carrying our own table. Using crypto layer proved to have too much overhead compared to using the library directly. Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
The crc32c library used an identical table and algorithm
as SCTP.  Switch to using the library instead of carrying
our own table.  Using crypto layer proved to have too
much overhead compared to using the library directly.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>