net: syncookies: export cookie_v4_init_sequence/cookie_v4_check
Extract the local TCP stack independant parts of tcp_v4_init_sequence() and cookie_v4_check() and export them for use by the upcoming SYNPROXY target. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: Martin Topholm <mph@one.com> Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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