Replace first padding in the tcp_md5sig structure with a new flag field
and address prefix length so it can be specified when configuring a new
key for TCP MD5 signature. The tcpm_flags field will only be used if the
socket option is TCP_MD5SIG_EXT to avoid breaking existing programs, and
tcpm_prefixlen only when the TCP_MD5SIG_FLAG_PREFIX flag is set.
Signed-off-by: NBob Gilligan <gilligan@arista.com>
Signed-off-by: NEric Mowat <mowat@arista.com>
Signed-off-by: NIvan Delalande <colona@arista.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>