This patch implements the kernel side of the TCP option patch.
Signed-off-by: NManuel Messner <mm@skelett.io>
Reviewed-by: NFlorian Westphal <fw@strlen.de>
Acked-by: NPhil Sutter <phil@nwl.cc>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>