049fe386d3
Because TCP-level resets only affect the subflow, there is a MPTCP option to indicate that the MPTCP-level connection should be closed immediately without a mptcp-level fin exchange. This is the 'MPTCP fast close option'. It can be carried on ack segments or TCP resets. In the latter case, its needed to parse mptcp options also for reset packets so that MPTCP can act accordingly. Next patch will add receive side fastclose support in MPTCP. Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>