Florian Westphal dc87efdb1a
mptcp: add mptcp reset option support ...
The MPTCP reset option allows to carry a mptcp-specific error code that
provides more information on the nature of a connection reset.
Reset option data received gets stored in the subflow context so it can
be sent to userspace via the 'subflow closed' netlink event.
When a subflow is closed, the desired error code that should be sent to
the peer is also placed in the subflow context structure.
If a reset is sent before subflow establishment could complete, e.g. on
HMAC failure during an MP_JOIN operation, the mptcp skb extension is
used to store the reset information.
Signed-off-by: Florian Westphal <fw@strlen.de >
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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