[RFC PATCH mptcp-next v8 0/7] mptcp: Fast Open Mechanism

[Dmytro Shytyi <dmytro@shytyi.net>]

[PATCH v8] includes "client-server" partial support for:
1. MPTCP cookie request from client (seems OK).
2. MPTCP cookie offering from server (seems OK).
3. MPTCP SYN+DATA+COOKIE from client (seems OK).
4. subsequent write + read on the opened socket (seems OK).
===Changes between v7 and v8
- We change from 0impact approach on existing TCP code to
  full reusage of existing and available functions.
- Code is refactored (Max. reuse of existing linux kernel code).
- fastopen.c is reduced to minima.
- Other comments from mailing list are coming in the next version.
===Future work
-Adress the appearance of "MPTCP FIN" as duplicated acks.
-Integrate presented in the last patch selftests. 

Dmytro Shytyi (7):
  add mptcp_stream_connect to protocol.h
  add mptcp_setsockopt_fastopen
  reuse tcp_sendmsg_fastopen()
  mptfo variables for msk, options. Fix loop retrans
  Fix unxpctd val of subflow->map_seq(dscrd packet)
  add skb to mskq in tcp_fastopen_add_skb()
  selftests: mptfo initiator/listener

 include/net/tcp.h                             |  5 +-
 net/ipv4/tcp.c                                | 18 +++-
 net/ipv4/tcp_fastopen.c                       | 55 +++++++++--
 net/ipv4/tcp_input.c                          | 11 ++-
 net/mptcp/Makefile                            |  2 +-
 net/mptcp/fastopen.c                          | 46 +++++++++
 net/mptcp/options.c                           |  9 ++
 net/mptcp/protocol.c                          | 19 ++--
 net/mptcp/protocol.h                          | 14 ++-
 net/mptcp/sockopt.c                           |  3 +
 tools/testing/selftests/net/mptcp/mptfo.sh    | 13 +++
 .../selftests/net/mptcp/mptfo_initiator.c     | 41 ++++++++
 .../selftests/net/mptcp/mptfo_listener.c      | 98 +++++++++++++++++++
 13 files changed, 311 insertions(+), 23 deletions(-)
 create mode 100644 net/mptcp/fastopen.c
 create mode 100644 tools/testing/selftests/net/mptcp/mptfo.sh
 create mode 100644 tools/testing/selftests/net/mptcp/mptfo_initiator.c
 create mode 100644 tools/testing/selftests/net/mptcp/mptfo_listener.c

-- 
2.25.1