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When ADD_ADDR suboption includes an IPv6 address, the size is 28 octets. It will not fit when other MPTCP suboptions are included in this packet, e.g. DSS. So here we send out an ADD_ADDR dedicated packet to carry only ADD_ADDR suboption, no other MPTCP suboptions. In mptcp_pm_announce_addr, we check whether this is an IPv6 ADD_ADDR. If it is, we set the flag MPTCP_ADD_ADDR_IPV6 to true. Then we call mptcp_pm_nl_add_addr_send_ack to sent out a new pure ACK packet. In mptcp_established_options_add_addr, we check whether this is a pure ACK packet for ADD_ADDR. If it is, we drop all other MPTCP suboptions in this packet, only put ADD_ADDR suboption in it. Suggested-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Geliang Tang <geliangtang@gmail.com> Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.